validate canons without yatest_common

35 files changed, 4009 insertions, 0 deletions

diff --git a/library/cpp/tvmauth/src/parser.cpp b/library/cpp/tvmauth/src/parser.cpp
new file mode 100644
index 0000000000..358de58d36
--- /dev/null
+++ b/library/cpp/tvmauth/src/parser.cpp
@@ -0,0 +1,97 @@
+#include "parser.h"
+
+#include "utils.h"
+
+#include <library/cpp/tvmauth/exception.h>
+
+#include <util/generic/strbuf.h>
+#include <util/string/split.h>
+
+#include <ctime>
+
+namespace NTvmAuth {
+    TString TParserTvmKeys::ParseStrV1(TStringBuf str) {
+        while (str && str.back() == '\n') {
+            str.Chop(1);
+        }
+
+        TStringBuf ver = str.NextTok(DELIM);
+        if (!str || !ver || ver != "1") {
+            throw TMalformedTvmKeysException() << "Malformed TVM keys";
+        }
+        TString res = NUtils::Base64url2bin(str);
+        if (res.empty()) {
+            throw TMalformedTvmKeysException() << "Malformed TVM keys";
+        }
+        return res;
+    }
+
+    TStringBuf TParserTickets::UserFlag() {
+        static const char BUF_[] = "user";
+        return TStringBuf(BUF_, sizeof(BUF_) - 1);
+    }
+
+    TStringBuf TParserTickets::ServiceFlag() {
+        static const char BUF_[] = "serv";
+        return TStringBuf(BUF_, sizeof(BUF_) - 1);
+    }
+
+    TParserTickets::TRes TParserTickets::ParseV3(TStringBuf body, const NRw::TPublicKeys& keys, TStringBuf type) {
+        TStrRes str = ParseStrV3(body, type);
+        TRes res(str.Status);
+        if (str.Status != ETicketStatus::Ok) {
+            return TRes(str.Status);
+        }
+        if (!res.Ticket.ParseFromString(str.Proto)) {
+            res.Status = ETicketStatus::Malformed;
+            return res;
+        }
+        if (res.Ticket.expirationtime() <= time(nullptr)) {
+            res.Status = ETicketStatus::Expired;
+            return res;
+        }
+
+        auto itKey = keys.find(res.Ticket.keyid());
+        if (itKey == keys.end()) {
+            res.Status = ETicketStatus::MissingKey;
+            return res;
+        }
+        if (!itKey->second.CheckSign(str.ForCheck, str.Sign)) {
+            res.Status = ETicketStatus::SignBroken;
+            return res;
+        }
+        return res;
+    }
+
+    TParserTickets::TStrRes TParserTickets::ParseStrV3(TStringBuf body, TStringBuf type) {
+        TStringBuf forCheck = body;
+        TStringBuf version = body.NextTok(DELIM);
+        if (!body || version.size() != 1) {
+            return {ETicketStatus::Malformed, {}, {}, {}};
+        }
+        if (version != "3") {
+            return {ETicketStatus::UnsupportedVersion, {}, {}, {}};
+        }
+
+        TStringBuf ticketType = body.NextTok(DELIM);
+        if (ticketType != type) {
+            return {ETicketStatus::InvalidTicketType, {}, {}, {}};
+        }
+
+        TStringBuf proto = body.NextTok(DELIM);
+        TStringBuf sign = body.NextTok(DELIM);
+
+        if (!proto || !sign || body.size() > 0) {
+            return {ETicketStatus::Malformed, {}, {}, {}};
+        }
+
+        TString protoBin = NUtils::Base64url2bin(proto);
+        TString signBin = NUtils::Base64url2bin(sign);
+
+        if (!protoBin || !signBin) {
+            return {ETicketStatus::Malformed, {}, {}, {}};
+        }
+
+        return {ETicketStatus::Ok, std::move(protoBin), std::move(signBin), forCheck.Chop(sign.size())};
+    }
+}
diff --git a/library/cpp/tvmauth/src/parser.h b/library/cpp/tvmauth/src/parser.h
new file mode 100644
index 0000000000..678e709444
--- /dev/null
+++ b/library/cpp/tvmauth/src/parser.h
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <library/cpp/tvmauth/src/protos/ticket2.pb.h>
+#include <library/cpp/tvmauth/src/rw/keys.h>
+
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <util/generic/fwd.h>
+
+#include <string>
+
+namespace NTvmAuth {
+    struct TParserTvmKeys {
+        static inline const char DELIM = ':';
+        static TString ParseStrV1(TStringBuf str);
+    };
+
+    struct TParserTickets {
+        static const char DELIM = ':';
+
+        static TStringBuf UserFlag();
+        static TStringBuf ServiceFlag();
+
+        struct TRes {
+            TRes(ETicketStatus status)
+                : Status(status)
+            {
+            }
+
+            ETicketStatus Status;
+
+            ticket2::Ticket Ticket;
+        };
+        static TRes ParseV3(TStringBuf body, const NRw::TPublicKeys& keys, TStringBuf type);
+
+        // private:
+        struct TStrRes {
+            const ETicketStatus Status;
+
+            TString Proto;
+            TString Sign;
+
+            TStringBuf ForCheck;
+
+            bool operator==(const TStrRes& o) const { // for tests
+                return Status == o.Status && Proto == o.Proto && Sign == o.Sign && ForCheck == o.ForCheck;
+            }
+        };
+        static TStrRes ParseStrV3(TStringBuf body, TStringBuf type);
+    };
+}
diff --git a/library/cpp/tvmauth/src/protos/ticket2.proto b/library/cpp/tvmauth/src/protos/ticket2.proto
new file mode 100644
index 0000000000..66c00a7d01
--- /dev/null
+++ b/library/cpp/tvmauth/src/protos/ticket2.proto
@@ -0,0 +1,31 @@
+package ticket2;
+
+option go_package = "a.yandex-team.ru/library/cpp/tvmauth/src/protos";
+
+import "library/cpp/tvmauth/src/protos/tvm_keys.proto";
+
+message User {
+    required uint64 uid = 1;
+}
+
+message UserTicket {
+    repeated User users = 1;
+    required uint64 defaultUid = 2;
+    repeated string scopes = 3;
+    required uint32 entryPoint = 4;
+    required tvm_keys.BbEnvType env = 5;
+}
+
+message ServiceTicket {
+    required uint32 srcClientId = 1;
+    required uint32 dstClientId = 2;
+    repeated string scopes = 3;
+    optional uint64 issuerUid = 4;
+}
+
+message Ticket {
+    required uint32 keyId = 1;
+    required int64  expirationTime = 2;
+    optional UserTicket user = 3;
+    optional ServiceTicket service = 4;
+}
diff --git a/library/cpp/tvmauth/src/protos/tvm_keys.proto b/library/cpp/tvmauth/src/protos/tvm_keys.proto
new file mode 100644
index 0000000000..9ba42dbf80
--- /dev/null
+++ b/library/cpp/tvmauth/src/protos/tvm_keys.proto
@@ -0,0 +1,36 @@
+package tvm_keys;
+
+option go_package = "a.yandex-team.ru/library/cpp/tvmauth/src/protos";
+
+enum KeyType {
+    RabinWilliams = 0;
+}
+
+enum BbEnvType {
+   Prod = 0;
+   Test = 1;
+   ProdYateam = 2;
+   TestYateam = 3;
+   Stress = 4;
+}
+
+message General {
+    required uint32 id = 1;
+    required KeyType type = 2;
+    required bytes body = 3;
+    optional int64 createdTime = 4;
+}
+
+message BbKey {
+    required General gen = 1;
+    required BbEnvType env = 2;
+}
+
+message TvmKey {
+    required General gen = 1;
+}
+
+message Keys {
+    repeated BbKey bb = 1;
+    repeated TvmKey tvm = 2;
+}
diff --git a/library/cpp/tvmauth/src/rw/keys.cpp b/library/cpp/tvmauth/src/rw/keys.cpp
new file mode 100644
index 0000000000..5fba7b9232
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/keys.cpp
@@ -0,0 +1,138 @@
+#include "keys.h"
+
+#include "rw.h"
+
+#include <library/cpp/openssl/init/init.h>
+
+#include <openssl/evp.h>
+
+#include <util/generic/strbuf.h>
+#include <util/generic/yexception.h>
+
+namespace {
+    struct TInit {
+        TInit() {
+            InitOpenSSL();
+        }
+    } INIT;
+}
+
+namespace NTvmAuth {
+    namespace NRw {
+        namespace NPrivate {
+            void TRwDestroyer::Destroy(TRwInternal* o) {
+                RwFree(o);
+            }
+
+            class TArrayDestroyer {
+            public:
+                static void Destroy(unsigned char* o) {
+                    free(o);
+                }
+            };
+        }
+
+        static TString SerializeRW(TRwKey* rw, int (*func)(const TRwKey*, unsigned char**)) {
+            unsigned char* buf = nullptr;
+            int size = func(rw, &buf);
+            THolder<unsigned char, NPrivate::TArrayDestroyer> guard(buf);
+            return TString((char*)buf, size);
+        }
+
+        TKeyPair GenKeyPair(size_t size) {
+            TRw rw(RwNew());
+            RwGenerateKey(rw.Get(), size);
+
+            TRw skey(RwPrivateKeyDup(rw.Get()));
+            TRw vkey(RwPublicKeyDup(rw.Get()));
+
+            TKeyPair res;
+            res.Private = SerializeRW(skey.Get(), &i2d_RWPrivateKey);
+            res.Public = SerializeRW(vkey.Get(), &i2d_RWPublicKey);
+
+            TRwPrivateKey prKey(res.Private, 0);
+            TRwPublicKey pubKey(res.Public);
+
+            const TStringBuf msg = "Test test test test test";
+
+            Y_ENSURE(pubKey.CheckSign(msg, prKey.SignTicket(msg)), "Failed to gen keys");
+
+            return res;
+        }
+
+        TRwPrivateKey::TRwPrivateKey(TStringBuf body, TKeyId id)
+            : Id_(id)
+            , Rw_(Deserialize(body))
+            , SignLen_(RwModSize(Rw_.Get()))
+        {
+            Y_ENSURE(SignLen_ > 0, "Private key has bad len: " << SignLen_);
+        }
+
+        TKeyId TRwPrivateKey::GetId() const {
+            return Id_;
+        }
+
+        TString TRwPrivateKey::SignTicket(TStringBuf ticket) const {
+            TString res(SignLen_, 0x00);
+
+            int len = RwPssrSignMsg(ticket.size(),
+                                    (const unsigned char*)ticket.data(),
+                                    (unsigned char*)res.data(),
+                                    Rw_.Get(),
+                                    (EVP_MD*)EVP_sha256());
+
+            Y_ENSURE(len > 0 && len <= SignLen_, "Signing failed. len: " << len);
+
+            res.resize(len);
+            return res;
+        }
+
+        TRw TRwPrivateKey::Deserialize(TStringBuf key) {
+            TRwKey* rw = nullptr;
+            auto data = reinterpret_cast<const unsigned char*>(key.data());
+            if (!d2i_RWPrivateKey(&rw, &data, key.size())) {
+                ythrow yexception() << "Private key is malformed";
+            }
+            return TRw(rw);
+        }
+
+        TRwPublicKey::TRwPublicKey(TStringBuf body)
+            : Rw_(Deserialize(body))
+        {
+        }
+
+        bool TRwPublicKey::CheckSign(TStringBuf ticket, TStringBuf sign) const {
+            int result = RwPssrVerifyMsg(ticket.size(),
+                                         (const unsigned char*)ticket.data(),
+                                         (unsigned char*)sign.data(),
+                                         sign.size(),
+                                         Rw_.Get(),
+                                         (EVP_MD*)EVP_sha256());
+
+            Y_ENSURE(result >= 0, "Failed to check sign: " << result);
+            return result;
+        }
+
+        TRw TRwPublicKey::Deserialize(TStringBuf key) {
+            TRwKey* rw = nullptr;
+            auto data = reinterpret_cast<const unsigned char*>(key.data());
+            auto status = d2i_RWPublicKey(&rw, &data, key.size());
+
+            TRw res(rw);
+            Y_ENSURE(status, "Public key is malformed: " << key);
+            return res;
+        }
+
+        TSecureHeap::TSecureHeap(size_t totalSize, int minChunkSize) {
+            CRYPTO_secure_malloc_init(totalSize, minChunkSize);
+        }
+
+        TSecureHeap::~TSecureHeap() {
+            CRYPTO_secure_malloc_done();
+        }
+
+        void TSecureHeap::Init(size_t totalSize, int minChunkSize) {
+            Singleton<TSecureHeap>(totalSize, minChunkSize);
+        }
+    }
+}
diff --git a/library/cpp/tvmauth/src/rw/keys.h b/library/cpp/tvmauth/src/rw/keys.h
new file mode 100644
index 0000000000..e02b7e72a1
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/keys.h
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <util/generic/ptr.h>
+#include <util/generic/string.h>
+
+#include <unordered_map>
+
+struct TRwInternal;
+
+namespace NTvmAuth {
+    namespace NRw {
+        namespace NPrivate {
+            class TRwDestroyer {
+            public:
+                static void Destroy(TRwInternal* o);
+            };
+        }
+
+        using TRw = THolder<TRwInternal, NPrivate::TRwDestroyer>;
+        using TKeyId = ui32;
+
+        struct TKeyPair {
+            TString Private;
+            TString Public;
+        };
+        TKeyPair GenKeyPair(size_t size);
+
+        class TRwPrivateKey {
+        public:
+            TRwPrivateKey(TStringBuf body, TKeyId id);
+
+            TKeyId GetId() const;
+            TString SignTicket(TStringBuf ticket) const;
+
+        private:
+            static TRw Deserialize(TStringBuf key);
+
+            TKeyId Id_;
+            TRw Rw_;
+            int SignLen_;
+        };
+
+        class TRwPublicKey {
+        public:
+            TRwPublicKey(TStringBuf body);
+
+            bool CheckSign(TStringBuf ticket, TStringBuf sign) const;
+
+        private:
+            static TRw Deserialize(TStringBuf key);
+
+            TRw Rw_;
+        };
+
+        using TPublicKeys = std::unordered_map<TKeyId, TRwPublicKey>;
+
+        class TSecureHeap {
+        public:
+            TSecureHeap(size_t totalSize, int minChunkSize);
+            ~TSecureHeap();
+
+            static void Init(size_t totalSize = 16 * 1024 * 1024, int minChunkSize = 16);
+        };
+    }
+}
diff --git a/library/cpp/tvmauth/src/rw/rw.h b/library/cpp/tvmauth/src/rw/rw.h
new file mode 100644
index 0000000000..aee49148eb
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw.h
@@ -0,0 +1,86 @@
+#pragma once
+
+#include <openssl/bn.h>
+#include <openssl/crypto.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    typedef struct {
+        BIGNUM* S;
+    } TRwSignature;
+
+    /*Rabin–Williams*/
+    typedef struct TRwInternal TRwKey;
+
+    typedef struct {
+        TRwSignature* (*RwSign)(const unsigned char* dgst, const int dlen, TRwKey* rw);
+        int (*RwVerify)(const unsigned char* dgst, int dgst_len, TRwSignature* sig, const TRwKey* rw);
+        int (*RwApply)(BIGNUM* r, BIGNUM* x, BN_CTX* ctx, const TRwKey* rw);
+    } TRwMethod;
+
+    struct TRwInternal {
+        /* first private multiplier */
+        BIGNUM* P;
+        /* second private multiplier */
+        BIGNUM* Q;
+        /* n = p*q - RW modulus */
+        BIGNUM* N;
+        /* precomputed 2^((3q-5)/8) mod q */
+        BIGNUM* Twomq;
+        /* precomputed 2^((9p-11)/8) mod p*/
+        BIGNUM* Twomp;
+        /* precomputed q^(p-2) == q^(-1) mod p */
+        BIGNUM* Iqmp;
+        /* (q+1) / 8 */
+        BIGNUM* Dq;
+        /* (p-3) / 8 */
+        BIGNUM* Dp;
+        /* functions for working with RW */
+        const TRwMethod* Meth;
+    };
+
+    TRwSignature* RwSignatureNew(void);
+    void RwSignatureFree(TRwSignature* a);
+
+    /* RW signing functions */
+    /* the function can put some tmp values to rw */
+    int RwPssrSignHash(const unsigned char* from, unsigned char* to, TRwKey* rw, const EVP_MD* md);
+    int RwPssrSignMsg(const int msgLen, const unsigned char* msg, unsigned char* to, TRwKey* rw, const EVP_MD* md);
+
+    /* RW-PSS verification functions */
+    int RwPssrVerifyHash(const unsigned char* from, const unsigned char* sig, const int sig_len, const TRwKey* rw, const EVP_MD* md);
+    int RwPssrVerifyMsg(const int msgLen, const unsigned char* msg, const unsigned char* sig, const int sig_len, const TRwKey* rw, const EVP_MD* md);
+
+    /* internal functions, use them only if you know what you're doing */
+    int RwNoPaddingSign(int flen, const unsigned char* from, unsigned char* to, TRwKey* rw);
+    int RwApply(const int flen, const unsigned char* from, unsigned char* to, const TRwKey* rw);
+
+    const TRwMethod* RwDefaultMethods(void);
+
+    TRwKey* RwNew(void);
+    void RwFree(TRwKey* r);
+    int RwSize(const TRwKey* rw);
+    int RwModSize(const TRwKey* rw);
+
+    TRwKey* RwPublicKeyDup(TRwKey* rw);
+    TRwKey* RwPrivateKeyDup(TRwKey* rw);
+
+    // NOLINTNEXTLINE(readability-identifier-naming)
+    TRwKey* d2i_RWPublicKey(TRwKey** a, const unsigned char** pp, long length);
+    // NOLINTNEXTLINE(readability-identifier-naming)
+    TRwKey* d2i_RWPrivateKey(TRwKey** a, const unsigned char** pp, long length);
+
+    int RwGenerateKey(TRwKey* a, int bits);
+    // NOLINTNEXTLINE(readability-identifier-naming)
+    int i2d_RWPublicKey(const TRwKey* a, unsigned char** pp);
+    // NOLINTNEXTLINE(readability-identifier-naming)
+    int i2d_RWPrivateKey(const TRwKey* a, unsigned char** pp);
+
+    int RwPaddingAddPssr(const TRwKey* rw, unsigned char* EM, const unsigned char* mHash, const EVP_MD* Hash, int sLen);
+    int RwVerifyPssr(const TRwKey* rw, const unsigned char* mHash, const EVP_MD* Hash, const unsigned char* EM, int sLen);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/library/cpp/tvmauth/src/rw/rw_asn1.c b/library/cpp/tvmauth/src/rw/rw_asn1.c
new file mode 100644
index 0000000000..f9dfe3996d
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_asn1.c
@@ -0,0 +1,81 @@
+#include "rw.h"
+
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/rand.h>
+
+#include <stdio.h>
+
+/* Override the default new methods */
+/* This callback is used by OpenSSL's ASN.1 parser */
+static int SignatureCallback(int operation, ASN1_VALUE** pval, const ASN1_ITEM* it, void* exarg) {
+    (void)it;
+    (void)exarg;
+
+    if (operation == ASN1_OP_NEW_PRE) {
+        TRwSignature* sig;
+        sig = OPENSSL_malloc(sizeof(TRwSignature));
+        if (!sig)
+            return 0;
+        sig->S = NULL;
+        *pval = (ASN1_VALUE*)sig;
+        return 2;
+    }
+    return 1;
+}
+
+/* ASN.1 structure representing RW signature value */
+ASN1_SEQUENCE_cb(TRwSignature, SignatureCallback) = {
+    ASN1_SIMPLE(TRwSignature, S, BIGNUM),
+} ASN1_SEQUENCE_END_cb(TRwSignature, TRwSignature)
+
+    /* i2d_ and d2i functions implementation for RW */
+    IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(TRwSignature, TRwSignature, TRwSignature)
+
+    /* Override the default free and new methods */
+    static int RwCallback(int operation, ASN1_VALUE** pval, const ASN1_ITEM* it, void* exarg) {
+    (void)it;
+    (void)exarg;
+
+    if (operation == ASN1_OP_NEW_PRE) {
+        *pval = (ASN1_VALUE*)RwNew();
+        if (*pval)
+            return 2;
+        return 0;
+    } else if (operation == ASN1_OP_FREE_PRE) {
+        RwFree((TRwKey*)*pval);
+        *pval = NULL;
+        return 2;
+    }
+    return 1;
+}
+
+/* ASN.1 representation of RW's private key */
+ASN1_SEQUENCE_cb(RWPrivateKey, RwCallback) = {
+    ASN1_SIMPLE(TRwKey, N, BIGNUM),
+    ASN1_SIMPLE(TRwKey, P, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Q, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Iqmp, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Dq, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Dp, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Twomp, CBIGNUM),
+    ASN1_SIMPLE(TRwKey, Twomq, CBIGNUM)} ASN1_SEQUENCE_END_cb(TRwKey, RWPrivateKey);
+
+/* i2d_ and d2i_ functions for RW's private key */
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(TRwKey, RWPrivateKey, RWPrivateKey);
+
+/* ASN.1 representation of RW public key */
+ASN1_SEQUENCE_cb(RWPublicKey, RwCallback) = {
+    ASN1_SIMPLE(TRwKey, N, BIGNUM),
+} ASN1_SEQUENCE_END_cb(TRwKey, RWPublicKey);
+
+/* i2d_ and d2i functions for RW public key */
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(TRwKey, RWPublicKey, RWPublicKey);
+
+TRwKey* RwPublicKeyDup(TRwKey* rw) {
+    return ASN1_item_dup(ASN1_ITEM_rptr(RWPublicKey), rw);
+}
+
+TRwKey* RwPrivateKeyDup(TRwKey* rw) {
+    return ASN1_item_dup(ASN1_ITEM_rptr(RWPrivateKey), rw);
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_key.c b/library/cpp/tvmauth/src/rw/rw_key.c
new file mode 100644
index 0000000000..78baaf4dd9
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_key.c
@@ -0,0 +1,135 @@
+#include "rw.h"
+
+#include <openssl/rand.h>
+
+int RwGenerateKey(TRwKey* rw, int bits) {
+    int ok = 0;
+
+    BN_CTX* ctx = NULL;
+    BIGNUM *rem3 = NULL, *rem7 = NULL, *mod8 = NULL, *rem5 = NULL;
+    BIGNUM *nmod = NULL, *twomqexp = NULL, *twompexp = NULL, *two = NULL;
+
+    int bitsp = (bits + 1) / 2;
+    int bitsq = bits - bitsp;
+
+    /* make sure that all components are not null */
+    if ((ctx = BN_CTX_secure_new()) == NULL)
+        goto err;
+    if (!rw)
+        goto err;
+    if (!rw->N && ((rw->N = BN_new()) == NULL))
+        goto err;
+    if (!rw->P && ((rw->P = BN_new()) == NULL))
+        goto err;
+    if (!rw->Q && ((rw->Q = BN_new()) == NULL))
+        goto err;
+    if (!rw->Iqmp && ((rw->Iqmp = BN_new()) == NULL))
+        goto err;
+    if (!rw->Twomq && ((rw->Twomq = BN_new()) == NULL))
+        goto err;
+    if (!rw->Twomp && ((rw->Twomp = BN_new()) == NULL))
+        goto err;
+    if (!rw->Dq && ((rw->Dq = BN_new()) == NULL))
+        goto err;
+    if (!rw->Dp && ((rw->Dp = BN_new()) == NULL))
+        goto err;
+
+    BN_CTX_start(ctx);
+
+    rem3 = BN_CTX_get(ctx);
+    rem7 = BN_CTX_get(ctx);
+    rem5 = BN_CTX_get(ctx);
+    mod8 = BN_CTX_get(ctx);
+    nmod = BN_CTX_get(ctx);
+    twomqexp = BN_CTX_get(ctx);
+    twompexp = BN_CTX_get(ctx);
+    two = BN_CTX_get(ctx);
+
+    if (!BN_set_word(mod8, 8))
+        goto err;
+    if (!BN_set_word(rem3, 3))
+        goto err;
+    if (!BN_set_word(rem7, 7))
+        goto err;
+    if (!BN_set_word(rem5, 5))
+        goto err;
+    if (!BN_set_word(two, 2))
+        goto err;
+
+    /* generate p */
+    /* add == 8 */
+    /* rem == 3 */
+    /* safe == 0 as we don't need (p-1)/2 to be also prime */
+    if (!BN_generate_prime_ex(rw->P, bitsp, 0, mod8, rem3, NULL))
+        goto err;
+
+    /* generate q */
+    /* add == 8 */
+    /* rem == 7 */
+    /* safe == 0 */
+    if (!BN_generate_prime_ex(rw->Q, bitsq, 0, mod8, rem7, NULL))
+        goto err;
+
+    /* n == p*q */
+    if (!BN_mul(rw->N, rw->P, rw->Q, ctx))
+        goto err;
+
+    /* n == 5 mod 8 ? */
+    if (!BN_nnmod(nmod, rw->N, mod8, ctx))
+        goto err;
+    if (BN_ucmp(rem5, nmod) != 0)
+        goto err;
+
+    /* q^(-1) mod p */
+    if (!BN_mod_inverse(rw->Iqmp, rw->Q, rw->P, ctx))
+        goto err;
+
+    /* twomqexp = (3q-5)/8 */
+    if (!BN_copy(twomqexp, rw->Q))
+        goto err;
+    if (!BN_mul_word(twomqexp, 3))
+        goto err;
+    if (!BN_sub_word(twomqexp, 5))
+        goto err;
+    if (!BN_rshift(twomqexp, twomqexp, 3))
+        goto err;
+    if (!BN_mod_exp(rw->Twomq, two, twomqexp, rw->Q, ctx))
+        goto err;
+
+    /* twompexp = (9p-11)/8 */
+    if (!BN_copy(twompexp, rw->P))
+        goto err;
+    if (!BN_mul_word(twompexp, 9))
+        goto err;
+    if (!BN_sub_word(twompexp, 11))
+        goto err;
+    if (!BN_rshift(twompexp, twompexp, 3))
+        goto err;
+    if (!BN_mod_exp(rw->Twomp, two, twompexp, rw->P, ctx))
+        goto err;
+
+    /* dp = (p-3) / 8 */
+    if (!BN_copy(rw->Dp, rw->P))
+        goto err;
+    if (!BN_sub_word(rw->Dp, 3))
+        goto err;
+    if (!BN_rshift(rw->Dp, rw->Dp, 3))
+        goto err;
+
+    /* dq = (q+1) / 8 */
+    if (!BN_copy(rw->Dq, rw->Q))
+        goto err;
+    if (!BN_add_word(rw->Dq, 1))
+        goto err;
+    if (!BN_rshift(rw->Dq, rw->Dq, 3))
+        goto err;
+
+    ok = 1;
+
+err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    return ok;
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_lib.c b/library/cpp/tvmauth/src/rw/rw_lib.c
new file mode 100644
index 0000000000..afd73da38b
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_lib.c
@@ -0,0 +1,77 @@
+#include "rw.h"
+
+#include <openssl/asn1.h>
+
+#include <stdio.h>
+
+TRwKey* RwNew(void) {
+    TRwKey* ret = NULL;
+
+    ret = (TRwKey*)malloc(sizeof(TRwKey));
+    if (ret == NULL) {
+        return (NULL);
+    }
+    ret->Meth = RwDefaultMethods();
+
+    ret->P = NULL;
+    ret->Q = NULL;
+    ret->N = NULL;
+    ret->Iqmp = NULL;
+    ret->Twomq = NULL;
+    ret->Twomp = NULL;
+    ret->Dp = NULL;
+    ret->Dq = NULL;
+
+    return ret;
+}
+
+void RwFree(TRwKey* r) {
+    if (r == NULL)
+        return;
+
+    if (r->P != NULL)
+        BN_clear_free(r->P);
+    if (r->Q != NULL)
+        BN_clear_free(r->Q);
+    if (r->N != NULL)
+        BN_clear_free(r->N);
+    if (r->Iqmp != NULL)
+        BN_clear_free(r->Iqmp);
+    if (r->Dp != NULL)
+        BN_clear_free(r->Dp);
+    if (r->Dq != NULL)
+        BN_clear_free(r->Dq);
+    if (r->Twomp != NULL)
+        BN_clear_free(r->Twomp);
+    if (r->Twomq != NULL)
+        BN_clear_free(r->Twomq);
+
+    free(r);
+}
+
+int RwSize(const TRwKey* r) {
+    int ret = 0, i = 0;
+    ASN1_INTEGER bs;
+    unsigned char buf[4]; /* 4 bytes looks really small.
+                             However, i2d_ASN1_INTEGER() will not look
+                             beyond the first byte, as long as the second
+                             parameter is NULL. */
+
+    i = BN_num_bits(r->N);
+    bs.length = (i + 7) / 8;
+    bs.data = buf;
+    bs.type = V_ASN1_INTEGER;
+    /* If the top bit is set the asn1 encoding is 1 larger. */
+    buf[0] = 0xff;
+
+    i = i2d_ASN1_INTEGER(&bs, NULL);
+
+    ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
+    return ret;
+}
+
+int RwModSize(const TRwKey* rw) {
+    if (rw == NULL || rw->N == NULL)
+        return 0;
+    return BN_num_bytes(rw->N);
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_ossl.c b/library/cpp/tvmauth/src/rw/rw_ossl.c
new file mode 100644
index 0000000000..85bcb802e9
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_ossl.c
@@ -0,0 +1,481 @@
+#include "rw.h"
+
+#include <openssl/rand.h>
+
+//#define RW_PRINT_DEBUG
+//#define AVOID_IF
+//#define FAULT_TOLERANCE_CHECK
+
+#ifdef RW_PRINT_DEBUG
+    #include <stdio.h>
+#endif
+
+static TRwSignature* RwDoSign(const unsigned char* dgst, int dlen, TRwKey* rw);
+static int RwDoVerify(const unsigned char* dgst, int dgst_len, TRwSignature* sig, const TRwKey* rw);
+static int RwDoApply(BIGNUM* r, BIGNUM* x, BN_CTX* ctx, const TRwKey* rw);
+
+static TRwMethod rw_default_meth = {
+    RwDoSign,
+    RwDoVerify,
+    RwDoApply};
+
+const TRwMethod* RwDefaultMethods(void) {
+    return &rw_default_meth;
+}
+
+#ifdef RW_PRINT_DEBUG
+
+static void print_bn(char* name, BIGNUM* value) {
+    char* str_repr;
+    str_repr = BN_bn2dec(value);
+    printf("Name: %s\n", name);
+    printf("Value: %s\n", str_repr);
+    OPENSSL_free(str_repr);
+}
+
+    #define DEBUG_PRINT_BN(s, x) \
+        do {                     \
+            print_bn((s), (x));  \
+        } while (0);
+    #define DEBUG_PRINT_RW(r)                        \
+        do {                                         \
+            DEBUG_PRINT_BN("rw->p", (r)->p);         \
+            DEBUG_PRINT_BN("rw->q", (r)->q);         \
+            DEBUG_PRINT_BN("rw->n", (r)->n);         \
+            DEBUG_PRINT_BN("rw->iqmp", (r)->iqmp);   \
+            DEBUG_PRINT_BN("rw->twomp", (r)->twomp); \
+            DEBUG_PRINT_BN("rw->twomq", (r)->twomq); \
+            DEBUG_PRINT_BN("rw->dp", (r)->dp);       \
+            DEBUG_PRINT_BN("rw->dq", (r)->dq);       \
+        } while (0);
+    #define DEBUG_PRINTF(s, v) \
+        do {                   \
+            printf((s), (v));  \
+        } while (0);
+#else
+    #define DEBUG_PRINT_BN(s, x)
+    #define DEBUG_PRINT_RW(r)
+    #define DEBUG_PRINTF(s, v)
+#endif
+
+/*
+ * The algorithms was taken from
+ * https://cr.yp.to/sigs/rwsota-20080131.pdf
+ * Section 6 -> "Avoiding Jacobi symbols"
+ * '^' means power
+ * 1. Compute U = h ^ ((q+1) / 8) mod q
+ * 2. If U ^ 4 - h mod q == 0, set e = 1 otherwise set e = -1
+ * 3. Compute V = (eh) ^ ((p-3)/8) mod p
+ * 4. If (V^4 * (eh)^2 - eh) mod p = 0; set f = 1; otherwise set f = 2
+ * 5. Precompute 2^((3q-5) / 8) mod q; Compute W = f^((3*q - 5) / 8) * U mod q
+ * 6. Precompute 2^((9p-11) / 8) mod p; Compute X = f^((9p-11) / 8) * V^3 * eh mod p
+ * 7. Precompute q^(p-2) mod p; Compute Y = W + q(q^(p-2) * (X - W) mod p)
+ * 8. Compute s = Y^2 mod pq
+ * 9. Fault tolerance: if efs^2 mod pq != h start over
+ */
+static TRwSignature* RwDoSign(const unsigned char* dgst, int dlen, TRwKey* rw) {
+    BIGNUM *m, *U, *V, *tmp, *m_q, *m_p, *tmp2;
+    /* additional variables to avoid "if" statements */
+    BIGNUM* tmp_mp;
+    TRwSignature* ret = NULL;
+    BN_CTX* ctx = NULL;
+    int ok = 0, e = 0, f = 0;
+
+#ifdef AVOID_IF
+    /* additional variables to avoid "if" statements */
+    BIGNUM *tmp_U, *tmp_V;
+#endif
+
+    if (!rw || !rw->P || !rw->Q || !rw->N || !rw->Iqmp || !rw->Dp || !rw->Dq || !rw->Twomp || !rw->Twomq)
+        goto err;
+
+    if ((ctx = BN_CTX_secure_new()) == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+
+    m = BN_CTX_get(ctx);
+    U = BN_CTX_get(ctx);
+    V = BN_CTX_get(ctx);
+    tmp = BN_CTX_get(ctx);
+    tmp2 = BN_CTX_get(ctx);
+    m_q = BN_CTX_get(ctx);
+    m_p = BN_CTX_get(ctx);
+    tmp_mp = BN_CTX_get(ctx);
+
+#ifdef AVOID_IF
+    tmp_U = BN_CTX_get(ctx);
+    tmp_V = BN_CTX_get(ctx);
+#endif
+
+    DEBUG_PRINT_RW(rw)
+
+    /* if (!BN_set_word(four, 4)) goto err; */
+
+    if (!BN_bin2bn(dgst, dlen, m))
+        goto err;
+    if (BN_ucmp(m, rw->N) >= 0)
+        goto err;
+
+    /* check if m % 16 == 12 */
+    if (BN_mod_word(m, 16) != 12)
+        goto err;
+    DEBUG_PRINT_BN("m", m)
+
+    /* TODO: optimization to avoid memory allocation? */
+    if ((ret = RwSignatureNew()) == NULL)
+        goto err;
+    /* memory allocation */
+    if ((ret->S = BN_new()) == NULL)
+        goto err;
+
+    /* m_q = m mod q */
+    if (!BN_nnmod(m_q, m, rw->Q, ctx))
+        goto err;
+    /* m_p = m mod p */
+    if (!BN_nnmod(m_p, m, rw->P, ctx))
+        goto err;
+
+    DEBUG_PRINT_BN("m_p", m_p)
+    DEBUG_PRINT_BN("m_q", m_q)
+
+    /* U = h ** ((q+1)/8) mod q */
+    if (!BN_mod_exp(U, m_q, rw->Dq, rw->Q, ctx))
+        goto err;
+    DEBUG_PRINT_BN("U", U)
+
+    /* tmp = U^4 - h mod q */
+    if (!BN_mod_sqr(tmp, U, rw->Q, ctx))
+        goto err;
+    if (!BN_mod_sqr(tmp, tmp, rw->Q, ctx))
+        goto err;
+    DEBUG_PRINT_BN("U**4 mod q", tmp)
+
+    /* e = 1 if tmp == 0 else -1 */
+    e = 2 * (BN_ucmp(tmp, m_q) == 0) - 1;
+    DEBUG_PRINTF("e == %i\n", e)
+
+    /*
+     to avoid "if" branch
+     if e == -1: m_p = tmp_mp
+     if e ==  1: m_p = m_p
+     */
+    if (!BN_sub(tmp_mp, rw->P, m_p))
+        goto err;
+    m_p = (BIGNUM*)((1 - ((1 + e) >> 1)) * (BN_ULONG)tmp_mp + ((1 + e) >> 1) * (BN_ULONG)m_p);
+    DEBUG_PRINT_BN("eh mod p", m_p)
+
+    /* V = (eh) ** ((p-3)/8) */
+    if (!BN_mod_exp(V, m_p, rw->Dp, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("V == ((eh) ** ((p-3)/8))", V)
+
+    /* (eh) ** 2 */
+    if (!BN_mod_sqr(tmp2, m_p, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("(eh)**2", tmp2)
+
+    /* V ** 4 */
+    if (!BN_mod_sqr(tmp, V, rw->P, ctx))
+        goto err;
+    if (!BN_mod_sqr(tmp, tmp, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("V**4", tmp)
+
+    /* V**4 * (eh)**2 */
+    if (!BN_mod_mul(tmp, tmp, tmp2, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("tmp = (V**4 * (eh)**2) mod p", tmp)
+
+    /* tmp = tmp - eh mod p */
+    if (!BN_mod_sub(tmp, tmp, m_p, rw->P, ctx))
+        goto err;
+
+    /* f = 1 if zero else 2 */
+    f = 2 - BN_is_zero(tmp);
+    /* f = 2 - (constant_time_is_zero(BN_ucmp(tmp, m_p)) & 1); */
+    DEBUG_PRINTF("f == %i\n", f)
+
+#ifdef AVOID_IF
+    if (!BN_mod_mul(tmp_U, U, rw->twomq, rw->q, ctx))
+        goto err;
+
+    /*
+     to avoid "if" branch we use tiny additional computation
+     */
+    U = (BIGNUM*)((2 - f) * (BN_ULONG)U + (1 - (2 - f)) * (BN_ULONG)tmp_U);
+#else
+
+    if (f == 2) {
+        if (!BN_mod_mul(U, U, rw->Twomq, rw->Q, ctx))
+            goto err;
+    }
+
+#endif
+
+    DEBUG_PRINT_BN("W", U)
+
+    /* V ** 3 */
+    if (!BN_mod_sqr(tmp, V, rw->P, ctx))
+        goto err;
+    if (!BN_mod_mul(V, V, tmp, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("V**3", V)
+
+    /* *(eh) */
+    if (!BN_mod_mul(V, V, m_p, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("V**3 * (eh) mod p", V)
+
+#ifdef AVOID_IF
+
+    /* to avoid "if" statement we use simple computation */
+    if (!BN_mod_mul(tmp_V, V, rw->twomp, rw->p, ctx))
+        goto err;
+    V = (BIGNUM*)((2 - f) * (BN_ULONG)V + (1 - (2 - f)) * (BN_ULONG)tmp_V);
+
+#else
+
+    if (f == 2) {
+        if (!BN_mod_mul(V, V, rw->Twomp, rw->P, ctx))
+            goto err;
+    }
+
+#endif
+
+    DEBUG_PRINT_BN("X", V)
+
+    /* W = U, X = V */
+    if (!BN_mod_sub(V, V, U, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("X - W mod p", V)
+
+    if (!BN_mod_mul(V, V, rw->Iqmp, rw->P, ctx))
+        goto err;
+    DEBUG_PRINT_BN("q**(p-2) * (X-W) mod p", V)
+
+    if (!BN_mul(V, V, rw->Q, ctx))
+        goto err;
+    DEBUG_PRINT_BN("q * prev mod p", V)
+
+    if (!BN_mod_add(V, U, V, rw->N, ctx))
+        goto err;
+    DEBUG_PRINT_BN("Y", V)
+
+    /* now V = Y */
+    if (!BN_mod_sqr(V, V, rw->N, ctx))
+        goto err;
+    DEBUG_PRINT_BN("s", V)
+
+#ifdef FAULT_TOLERANCE_CHECK
+
+    /* now V = s - principal square root */
+    /* fault tolerance check */
+    if (!BN_mod_sqr(tmp, V, rw->n, ctx))
+        goto err;
+    DEBUG_PRINT_BN("s**2", tmp)
+
+    if (!BN_mul_word(tmp, f))
+        goto err;
+    DEBUG_PRINT_BN("f * s**2", tmp)
+
+    if (!BN_nnmod(tmp, tmp, rw->n, ctx))
+        goto err;
+    DEBUG_PRINT_BN("s**2 * f mod n", tmp)
+
+    /* to avoid "if" statement */
+    if (!BN_sub(tmp2, rw->n, tmp))
+        goto err;
+    tmp = (BIGNUM*)(((1 + e) >> 1) * (BN_ULONG)tmp + (1 - ((1 + e) >> 1)) * (BN_ULONG)tmp2);
+    DEBUG_PRINT_BN("ef(s**2)", tmp)
+    DEBUG_PRINT_BN("(tmp == original m)", tmp)
+
+    if (BN_ucmp(tmp, m) != 0)
+        goto err;
+
+#endif
+
+    /* making the "principal square root" to be "|principal| square root" */
+    if (!BN_sub(tmp, rw->N, V))
+        goto err;
+
+    /* if tmp = MIN(V, rw->n - V) */
+    tmp = BN_ucmp(tmp, V) >= 0 ? V : tmp;
+
+    if (!BN_copy(ret->S, tmp))
+        goto err;
+
+    ok = 1;
+
+err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    if (!ok) {
+        RwSignatureFree(ret);
+        ret = NULL;
+    }
+
+    return ret;
+}
+
+static int RwDoVerify(const unsigned char* dgst, int dgst_len, TRwSignature* sig, const TRwKey* rw) {
+    BIGNUM *m = NULL, *x = NULL, *t1 = NULL, *t2 = NULL, *t1d = NULL, *t2d = NULL;
+    BN_CTX* ctx = NULL;
+    BN_ULONG rest1 = 0, rest2 = 0;
+    int retval = 0;
+
+    if (!rw || !rw->N || !sig || !sig->S)
+        goto err;
+
+    if ((ctx = BN_CTX_secure_new()) == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+
+    m = BN_CTX_get(ctx);
+    t1 = BN_CTX_get(ctx);
+    t2 = BN_CTX_get(ctx);
+    t1d = BN_CTX_get(ctx);
+    t2d = BN_CTX_get(ctx);
+
+    if (!BN_bin2bn(dgst, dgst_len, m))
+        goto err;
+    /* dgst too big */
+    if (!BN_copy(t1, rw->N))
+        goto err;
+    if (!BN_sub_word(t1, 1))
+        goto err;
+    if (!BN_rshift(t1, t1, 1))
+        goto err;
+
+    /* check m and rw->n relation */
+    if (BN_ucmp(m, rw->N) >= 0)
+        goto err;
+    rest1 = BN_mod_word(m, 16);
+    if (rest1 != 12)
+        goto err;
+
+    if (BN_ucmp(t1, sig->S) < 0)
+        goto err;
+    if (BN_is_negative(sig->S))
+        goto err;
+
+    if (!BN_mod_sqr(t1, sig->S, rw->N, ctx))
+        goto err;
+    if (!BN_sub(t2, rw->N, t1))
+        goto err;
+    if (!BN_lshift1(t1d, t1))
+        goto err;
+    if (!BN_lshift1(t2d, t2))
+        goto err;
+
+    rest1 = BN_mod_word(t1, 16);
+    rest2 = BN_mod_word(t2, 16);
+
+    /* mod 16 */
+    if (rest1 == 12) {
+        x = t1;
+    }
+    /* mod 8 */
+    else if ((rest1 & 0x07) == 6) {
+        x = t1d;
+    }
+    /* mod 16 */
+    else if (rest2 == 12) {
+        x = t2;
+    }
+    /* mod 8 */
+    else if ((rest2 & 0x07) == 6) {
+        x = t2d;
+    } else
+        goto err;
+
+    DEBUG_PRINT_BN("m", m)
+    DEBUG_PRINT_BN("x", x)
+
+    /* check signature value */
+    retval = BN_ucmp(m, x) == 0;
+
+err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    return retval;
+}
+
+static int RwDoApply(BIGNUM* r, BIGNUM* x, BN_CTX* ctx, const TRwKey* rw) {
+    BIGNUM *t1 = NULL, *t2 = NULL, *t1d = NULL, *t2d = NULL, *rs = NULL;
+    BN_ULONG rest1 = 0, rest2 = 0;
+    int retval = 0;
+
+    if (!rw || !rw->N || !x || !ctx || !r)
+        goto err;
+
+    DEBUG_PRINT_BN("Signature = x = ", x)
+    DEBUG_PRINT_BN("n", rw->n)
+
+    BN_CTX_start(ctx);
+
+    t1 = BN_CTX_get(ctx);
+    t2 = BN_CTX_get(ctx);
+    t1d = BN_CTX_get(ctx);
+    t2d = BN_CTX_get(ctx);
+
+    if (!BN_copy(t1, rw->N))
+        goto err;
+    if (!BN_sub_word(t1, 1))
+        goto err;
+    if (!BN_rshift(t1, t1, 1))
+        goto err;
+
+    /* check m and rw->n relation */
+    if (BN_ucmp(x, rw->N) >= 0)
+        goto err;
+
+    if (BN_ucmp(t1, x) < 0)
+        goto err;
+    if (BN_is_negative(x))
+        goto err;
+
+    if (!BN_mod_sqr(t1, x, rw->N, ctx))
+        goto err;
+    DEBUG_PRINT_BN("x**2 mod n", t1)
+
+    if (!BN_sub(t2, rw->N, t1))
+        goto err;
+    DEBUG_PRINT_BN("n - x**2", t2)
+
+    if (!BN_lshift1(t1d, t1))
+        goto err;
+    if (!BN_lshift1(t2d, t2))
+        goto err;
+
+    rest1 = BN_mod_word(t1, 16);
+    rest2 = BN_mod_word(t2, 16);
+
+    /* mod 16 */
+    if (rest1 == 12) {
+        rs = t1;
+    }
+    /* mod 8 */
+    else if ((rest1 & 0x07) == 6) {
+        rs = t1d;
+    }
+    /* mod 16 */
+    else if (rest2 == 12) {
+        rs = t2;
+    }
+    /* mod 8 */
+    else if ((rest2 & 0x07) == 6) {
+        rs = t2d;
+    } else
+        goto err;
+
+    DEBUG_PRINT_BN("Squaring and shifting result (rs)", rs)
+    retval = BN_copy(r, rs) != NULL;
+
+err:
+    BN_CTX_end(ctx);
+    return retval;
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_pss.c b/library/cpp/tvmauth/src/rw/rw_pss.c
new file mode 100644
index 0000000000..1e040a55eb
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_pss.c
@@ -0,0 +1,328 @@
+/*
+ * This code was taken from the OpenSSL's RSA implementation
+ * and added to the RW project with some changes
+ *
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2005.
+ *
+ */
+/* ====================================================================
+ * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include "rw.h"
+
+#include <openssl/bn.h>
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+#include <openssl/sha.h>
+
+#include <stdio.h>
+#include <string.h>
+
+static const unsigned char zeroes[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+static int PkcS1MgF1(unsigned char *mask, const int len, const unsigned char *seed, const int seedlen, const EVP_MD *dgst) {
+    int i, outlen = 0;
+    unsigned char cnt[4];
+    EVP_MD_CTX* c = EVP_MD_CTX_create();
+    unsigned char md[EVP_MAX_MD_SIZE];
+    int mdlen;
+    int rv = -1;
+
+    if (!c) {
+        return rv;
+    }
+
+    mdlen = EVP_MD_size(dgst);
+
+    if (mdlen < 0 || seedlen < 0)
+        goto err;
+
+    for (i = 0; outlen < len; i++) {
+        cnt[0] = (unsigned char)((i >> 24) & 255);
+        cnt[1] = (unsigned char)((i >> 16) & 255);
+        cnt[2] = (unsigned char)((i >> 8)) & 255;
+        cnt[3] = (unsigned char)(i & 255);
+
+        if (!EVP_DigestInit_ex(c,dgst, NULL) || !EVP_DigestUpdate(c, seed, seedlen) || !EVP_DigestUpdate(c, cnt, 4))
+            goto err;
+
+        if (outlen + mdlen <= len) {
+            if (!EVP_DigestFinal_ex(c, mask + outlen, NULL))
+                goto err;
+            outlen += mdlen;
+        } else {
+            if (!EVP_DigestFinal_ex(c, md, NULL))
+                goto err;
+            memcpy(mask + outlen, md, len - outlen);
+            outlen = len;
+        }
+    }
+    rv = 0;
+
+err:
+    EVP_MD_CTX_destroy(c);
+    return rv;
+}
+
+int RwVerifyPssr(const TRwKey *rw, const unsigned char *mHash, const EVP_MD *Hash, const unsigned char *EM, int sLen) {
+    int i = 0, ret = 0, hLen = 0, maskedDBLen = 0, MSBits = 0, emLen = 0;
+    const unsigned char *H = NULL;
+    unsigned char *DB = NULL;
+    EVP_MD_CTX* ctx = NULL;
+    unsigned char H_[EVP_MAX_MD_SIZE];
+    const EVP_MD *mgf1Hash = Hash;
+
+    ctx = EVP_MD_CTX_create();
+    if (!ctx) {
+        return ret;
+    }
+    hLen = EVP_MD_size(Hash);
+
+    if (hLen < 0)
+        goto err;
+    /*
+     * Negative sLen has special meanings:
+     *    -1    sLen == hLen
+     *    -2    salt length is autorecovered from signature
+     *    -N    reserved
+     */
+    if (sLen == -1)
+        sLen = hLen;
+    else if (sLen < -2)
+        goto err;
+
+    {
+        int bits = BN_num_bits(rw->N);
+        if (bits <= 0)
+            goto err;
+
+        MSBits = (bits - 1) & 0x7;
+    }
+    emLen = RwModSize(rw);
+
+    if (EM[0] & (0xFF << MSBits)) {
+        goto err;
+    }
+
+    if (MSBits == 0) {
+        EM++;
+        emLen--;
+    }
+
+    if (emLen < (hLen + sLen + 2)) /* sLen can be small negative */
+        goto err;
+
+    if (emLen < 1)
+        goto err;
+
+    if (EM[emLen - 1] != 0xbc)
+        goto err;
+
+    maskedDBLen = emLen - hLen - 1;
+    if (maskedDBLen <= 0)
+        goto err;
+
+    H = EM + maskedDBLen;
+    DB = malloc(maskedDBLen);
+
+    if (!DB)
+        goto err;
+
+    if (PkcS1MgF1(DB, maskedDBLen, H, hLen, mgf1Hash) < 0)
+        goto err;
+
+    for (i = 0; i < maskedDBLen; i++)
+        DB[i] ^= EM[i];
+
+    if (MSBits)
+        DB[0] &= 0xFF >> (8 - MSBits);
+
+    for (i = 0; DB[i] == 0 && i < (maskedDBLen-1); i++) ;
+
+    if (DB[i++] != 0x1)
+        goto err;
+
+    if (sLen >= 0 && (maskedDBLen - i) != sLen)
+        goto err;
+
+    if (!EVP_DigestInit_ex(ctx, Hash, NULL) || !EVP_DigestUpdate(ctx, zeroes, sizeof zeroes) || !EVP_DigestUpdate(ctx, mHash, hLen))
+        goto err;
+
+    if (maskedDBLen - i) {
+        if (!EVP_DigestUpdate(ctx, DB + i, maskedDBLen - i))
+            goto err;
+    }
+
+    if (!EVP_DigestFinal_ex(ctx, H_, NULL))
+        goto err;
+
+    ret = memcmp(H, H_, hLen) ? 0 : 1;
+
+err:
+    if (DB)
+        free(DB);
+
+    EVP_MD_CTX_destroy(ctx);
+
+    return ret;
+}
+
+/*
+ rw - public key
+ EM - buffer to write padding value
+ mHash - hash value
+ Hash - EVP_MD() that will be used to pad
+ sLen - random salt len (usually == hashLen)
+ */
+int RwPaddingAddPssr(const TRwKey *rw, unsigned char *EM, const unsigned char *mHash, const EVP_MD *Hash, int sLen) {
+    int i = 0, ret = 0, hLen = 0, maskedDBLen = 0, MSBits = 0, emLen = 0;
+    unsigned char *H = NULL, *salt = NULL, *p = NULL;
+    const EVP_MD *mgf1Hash = Hash;
+    EVP_MD_CTX* ctx = EVP_MD_CTX_create();
+    if (!ctx) {
+        return ret;
+    }
+
+    hLen = EVP_MD_size(Hash);
+    if (hLen < 0)
+        goto err;
+    /*
+     * Negative sLen has special meanings:
+     *    -1    sLen == hLen
+     *    -2    salt length is maximized
+     *    -N    reserved
+     */
+    if (sLen == -1)
+        sLen = hLen;
+    else if (sLen < -2)
+        goto err;
+
+    {
+        int bits = BN_num_bits(rw->N);
+        if (bits <= 0)
+            goto err;
+        MSBits = (bits - 1) & 0x7;
+    }
+    emLen = RwModSize(rw);
+    if (emLen <= 0)
+        goto err;
+
+    if (MSBits == 0) {
+        *EM++ = 0;
+        emLen--;
+        fprintf(stderr, "MSBits == 0\n");
+    }
+
+    if (sLen == -2) {
+        sLen = emLen - hLen - 2;
+    }
+    else if (emLen < (hLen + sLen + 2))
+        goto err;
+
+    if (sLen > 0) {
+        salt = malloc(sLen);
+        if (!salt) goto err;
+        if (RAND_bytes(salt, sLen) <= 0)
+            goto err;
+    }
+
+    maskedDBLen = emLen - hLen - 1;
+    if (maskedDBLen < 0)
+        goto err;
+    H = EM + maskedDBLen;
+
+    if (!EVP_DigestInit_ex(ctx, Hash, NULL) || !EVP_DigestUpdate(ctx, zeroes, sizeof zeroes) || !EVP_DigestUpdate(ctx, mHash, hLen))
+        goto err;
+
+    if (sLen && !EVP_DigestUpdate(ctx, salt, sLen))
+        goto err;
+
+    if (!EVP_DigestFinal_ex(ctx, H, NULL))
+        goto err;
+
+    /* Generate dbMask in place then perform XOR on it */
+    if (PkcS1MgF1(EM, maskedDBLen, H, hLen, mgf1Hash))
+        goto err;
+
+    p = EM;
+
+    /* Initial PS XORs with all zeroes which is a NOP so just update
+     * pointer. Note from a test above this value is guaranteed to
+     * be non-negative.
+     */
+    p += emLen - sLen - hLen - 2;
+    *p++ ^= 0x1;
+
+    if (sLen > 0) {
+        for (i = 0; i < sLen; i++)
+            *p++ ^= salt[i];
+    }
+
+    if (MSBits)
+        EM[0] &= 0xFF >> (8 - MSBits);
+
+    /* H is already in place so just set final 0xbc */
+    EM[emLen - 1] = 0xbc;
+
+    ret = 1;
+
+err:
+    EVP_MD_CTX_destroy(ctx);
+
+    if (salt)
+        free(salt);
+
+    return ret;
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_pss_sign.c b/library/cpp/tvmauth/src/rw/rw_pss_sign.c
new file mode 100644
index 0000000000..683514ad6d
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_pss_sign.c
@@ -0,0 +1,211 @@
+#include "rw.h"
+
+#include <openssl/evp.h>
+
+//#define DBG_FUZZING
+
+int RwApply(const int flen, const unsigned char* from, unsigned char* to, const TRwKey* rw) {
+    int i, j, num, k, r = -1;
+    BN_CTX* ctx = NULL;
+    BIGNUM *f = NULL, *ret = NULL;
+
+    if ((ctx = BN_CTX_secure_new()) == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+
+    f = BN_CTX_get(ctx);
+    ret = BN_CTX_get(ctx);
+
+    num = BN_num_bytes(rw->N);
+
+    if (num <= 0)
+        goto err;
+
+    if (!f || !ret)
+        goto err;
+
+    if (BN_bin2bn(from, flen, f) == NULL)
+        goto err;
+    if (BN_ucmp(f, rw->N) >= 0)
+        goto err;
+
+    if (!rw->Meth->RwApply(ret, f, ctx, rw))
+        goto err;
+
+    j = BN_num_bytes(ret);
+    if (num < j || j < 0)
+        goto err;
+
+    i = BN_bn2bin(ret, to + num - j);
+    if (i < 0 || i > num)
+        goto err;
+
+    for (k = 0; k < (num - i); k++)
+        to[k] = 0;
+    r = num;
+
+err:
+    if (ctx != NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+    }
+    return r;
+}
+
+int RwPssrSignHash(const unsigned char* from, unsigned char* to, TRwKey* rw, const EVP_MD* md) {
+    unsigned char* padding = NULL;
+    int result = 0;
+
+    if (from == NULL || to == NULL || rw == NULL || md == NULL)
+        return 0;
+
+    int digest_size = EVP_MD_size(md);
+    int sig_size = RwModSize(rw);
+
+    if (digest_size <= 0 || sig_size <= 0)
+        return 0;
+
+    int tries = 50;
+    do {
+        if (padding != NULL) {
+            free(padding);
+#ifdef DBG_FUZZING
+            fprintf(stderr, "Padding regenerating required\n");
+#endif
+        }
+
+        padding = malloc(sig_size);
+        if (padding == NULL)
+            return 0;
+
+        if (!RwPaddingAddPssr(rw, padding, from, md, digest_size))
+            goto err;
+    } while (padding[0] == 0x00 && tries-- > 0);
+
+    result = RwNoPaddingSign(sig_size, padding, to, rw);
+
+err:
+    if (padding != NULL)
+        free(padding);
+
+    return result;
+}
+
+int RwPssrSignMsg(const int msgLen, const unsigned char* msg, unsigned char* to, TRwKey* rw, const EVP_MD* md) {
+    EVP_MD_CTX* mdctx = NULL;
+    unsigned char* digest = NULL;
+    unsigned int digestLen;
+    int result = 0;
+
+    if (msg == NULL || to == NULL || rw == NULL || md == NULL)
+        goto err;
+
+    if (rw->P == NULL || rw->Q == NULL)
+        goto err;
+
+    if ((mdctx = EVP_MD_CTX_create()) == NULL)
+        goto err;
+
+    if (1 != EVP_DigestInit_ex(mdctx, md, NULL))
+        goto err;
+
+    if (1 != EVP_DigestUpdate(mdctx, msg, msgLen))
+        goto err;
+
+    if ((digest = (unsigned char*)malloc(EVP_MD_size(md))) == NULL)
+        goto err;
+
+    if (1 != EVP_DigestFinal_ex(mdctx, digest, &digestLen))
+        goto err;
+
+    result = RwPssrSignHash(digest, to, rw, md);
+
+err:
+    if (mdctx != NULL)
+        EVP_MD_CTX_destroy(mdctx);
+    if (digest != NULL)
+        free(digest);
+
+    return result;
+}
+
+int RwPssrVerifyHash(const unsigned char* from, const unsigned char* sig, const int sig_len, const TRwKey* rw, const EVP_MD* md) {
+    unsigned char* buffer = NULL;
+    int buffer_len;
+    int salt_size;
+    int result = 0;
+
+    if (from == NULL || sig == NULL || rw == NULL || md == NULL)
+        return 0;
+
+    if (rw->N == NULL || rw->Meth == NULL)
+        return 0;
+
+    salt_size = EVP_MD_size(md);
+    if (salt_size <= 0)
+        return 0;
+
+    buffer_len = RwModSize(rw);
+    if (buffer_len <= 0)
+        return 0;
+
+    buffer = (unsigned char*)malloc(buffer_len);
+    if (buffer == NULL)
+        return 0;
+
+    if (RwApply(sig_len, sig, buffer, rw) <= 0)
+        goto err;
+
+    if (RwVerifyPssr(rw, from, md, buffer, salt_size) <= 0)
+        goto err;
+
+    result = 1;
+
+err:
+    if (buffer != NULL)
+        free(buffer);
+
+    return result;
+}
+
+int RwPssrVerifyMsg(const int msgLen, const unsigned char* msg, const unsigned char* sig, const int sig_len, const TRwKey* rw, const EVP_MD* md) {
+    EVP_MD_CTX* mdctx = NULL;
+    unsigned char* digest = NULL;
+    unsigned int digestLen = 0;
+    int result = 0;
+
+    if (msg == NULL || msgLen == 0 || sig == NULL || rw == NULL || md == NULL)
+        goto err;
+
+    if (rw->N == NULL)
+        goto err;
+
+    if ((mdctx = EVP_MD_CTX_create()) == NULL)
+        goto err;
+
+    if (1 != EVP_DigestInit_ex(mdctx, md, NULL))
+        goto err;
+
+    int size_to_alloc = EVP_MD_size(md);
+    if (size_to_alloc <= 0)
+        goto err;
+
+    if ((digest = (unsigned char*)malloc(size_to_alloc)) == NULL)
+        goto err;
+
+    if (1 != EVP_DigestUpdate(mdctx, msg, msgLen))
+        goto err;
+
+    if (1 != EVP_DigestFinal_ex(mdctx, digest, &digestLen))
+        goto err;
+
+    result = RwPssrVerifyHash(digest, sig, sig_len, rw, md);
+
+err:
+    if (mdctx != NULL)
+        EVP_MD_CTX_destroy(mdctx);
+    if (digest != NULL)
+        free(digest);
+
+    return result;
+}
diff --git a/library/cpp/tvmauth/src/rw/rw_sign.c b/library/cpp/tvmauth/src/rw/rw_sign.c
new file mode 100644
index 0000000000..e320808dd3
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/rw_sign.c
@@ -0,0 +1,46 @@
+#include "rw.h"
+
+TRwSignature* RwSignatureNew(void) {
+    TRwSignature* sig = NULL;
+    sig = malloc(sizeof(TRwSignature));
+    if (!sig)
+        return NULL;
+    sig->S = NULL;
+    return sig;
+}
+
+void RwSignatureFree(TRwSignature* sig) {
+    if (sig) {
+        if (sig->S)
+            BN_free(sig->S);
+        free(sig);
+    }
+}
+
+int RwNoPaddingSign(int flen, const unsigned char* from, unsigned char* to, TRwKey* rw) {
+    int i = 0, r = 0, num = -1;
+    TRwSignature* sig = NULL;
+
+    if (!rw || !rw->N || !rw->Meth || !rw->Meth->RwSign || !from || !to)
+        goto err;
+
+    if ((sig = rw->Meth->RwSign(from, flen, rw)) == NULL)
+        goto err;
+    num = BN_num_bytes(rw->N);
+
+    r = BN_bn2bin(sig->S, to);
+    if (r < 0)
+        goto err;
+
+    /* put zeroes to the rest of the 'to' buffer */
+    for (i = r; i < num; i++) {
+        to[i] = 0x00;
+    }
+
+err:
+    if (sig != NULL) {
+        RwSignatureFree(sig);
+    }
+
+    return r;
+}
diff --git a/library/cpp/tvmauth/src/rw/ut/rw_ut.cpp b/library/cpp/tvmauth/src/rw/ut/rw_ut.cpp
new file mode 100644
index 0000000000..9467d5d7c4
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/ut/rw_ut.cpp
@@ -0,0 +1,200 @@
+#include <library/cpp/tvmauth/src/rw/keys.h>
+#include <library/cpp/tvmauth/src/rw/rw.h>
+
+#include <library/cpp/string_utils/base64/base64.h>
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <openssl/bn.h>
+#include <openssl/evp.h>
+
+namespace NTvmAuth {
+    /*
+ returns 0 in case of error
+ */
+    int MakeKeysRw(TRwKey** skey, TRwKey** vkey) {
+        int result = 0;
+
+        TRwKey* rw = RwNew();
+
+        do {
+            RwGenerateKey(rw, 2048);
+
+            if (rw == nullptr) {
+                printf("RwGenerateKey failed\n");
+                break; /* failed */
+            }
+
+            printf("RW key bits: %d\n", BN_num_bits(rw->N));
+
+            /* Set signing key */
+            *skey = RwPrivateKeyDup(rw);
+            if (*skey == nullptr) {
+                printf("RwPrivateKeyDup failed\n");
+                break;
+            }
+
+            /* Set verifier key */
+            *vkey = RwPublicKeyDup(rw);
+            if (*vkey == nullptr) {
+                printf("RwPublicKeyDup failed\n");
+                break;
+            }
+
+            result = 1;
+
+        } while (0);
+
+        if (rw) {
+            RwFree(rw);
+            rw = nullptr;
+        }
+
+        return result;
+    }
+
+    static void PrintIt(const char* label, const unsigned char* buff, size_t len) {
+        if (!buff || !len)
+            return;
+
+        if (label)
+            printf("%s: ", label);
+
+        for (size_t i = 0; i < len; ++i)
+            printf("%02X", buff[i]);
+
+        printf("\n");
+    }
+
+    int TestSignVerify() {
+        TRwKey *skey = nullptr, *vkey = nullptr;
+        const char* msg = "Test test test test test";
+        unsigned int msg_len = 0;
+        int res = 0;
+
+        msg_len = (unsigned int)strlen(msg);
+        if (MakeKeysRw(&skey, &vkey)) {
+            unsigned char* sign = new unsigned char[RwModSize(skey) + 10];
+            int sign_len;
+            printf("RwModSize(skey) returned %d\n", RwModSize(skey));
+            memset(sign, 0x00, RwModSize(skey) + 10);
+
+            printf("--- Signing call ---\n");
+            if ((sign_len = RwPssrSignMsg(msg_len, (unsigned char*)msg, sign, skey, (EVP_MD*)EVP_sha256())) != 0) {
+#ifdef RW_PRINT_DEBUG
+                BIGNUM* s = BN_new();
+#endif
+                printf("\n");
+                PrintIt("Signature", sign, RwModSize(skey));
+
+#ifdef RW_PRINT_DEBUG
+                BN_bin2bn(sign, RW_mod_size(skey), s);
+
+                print_bn("Signature BN", s);
+
+                BN_free(s);
+#endif
+
+                printf("--- Verification call ---\n");
+                if (RwPssrVerifyMsg(msg_len, (unsigned char*)msg, sign, sign_len, vkey, (EVP_MD*)EVP_sha256())) {
+                    printf("Verification: success!\n");
+                    res = 1;
+                } else {
+                    printf("Verification: failed!\n");
+                    printf("RwPssrVerifyMsg failed!\n");
+                    return 1;
+                }
+            } else {
+                printf("RwPssrSignMsg failed!\n");
+                return 1;
+            }
+
+            if (sign != nullptr)
+                delete[] sign;
+
+        } else {
+            printf("MakeKeysRw failed!\n");
+            return 1;
+        }
+
+        if (skey != nullptr) {
+            RwFree(skey);
+        }
+        if (vkey != nullptr)
+            RwFree(vkey);
+
+        return res;
+    }
+}
+
+using namespace NTvmAuth;
+Y_UNIT_TEST_SUITE(Rw) {
+    Y_UNIT_TEST(SignVerify) {
+        for (int i = 1; i < 10; ++i) {
+            UNIT_ASSERT_VALUES_EQUAL(1, TestSignVerify());
+        }
+    }
+
+    Y_UNIT_TEST(TKeysPriv) {
+        NRw::TRwPrivateKey priv(Base64Decode("MIIEmwKCAQBwsRd4frsVARIVSfj_vCdfvA3Q9SsGhSybdBDhbm8L6rPqxdoSNLCdNXzDWj7Ppf0o8uWHMxC-5Lfw0I18ri68nhm9-ndixcnbn6ti1uetgkc28eiEP6Q8ILD_JmkynbUl1aKDNAa5XsK2vFSEX402uydRomsTn46kRY23hfqcIi0ohh5VxIrpclRsRZus0JFu-RJzhqTbKYV4y4dglWPGHh5BuTv9k_Oh0_Ra8Xp5Rith5vjaKZUQ5Hyh9UtBYTkNWdvXP9OpmbiLVeRLuMzBm4HEFHDwMZ1h6LSVP-wB_spJPaMLTn3Q3JIHe-wGBYRWzU51RRYDqv4O_H12w5C1AoGBALAwCQ7fdAPG1lGclL7iWFjUofwPCFwPyDjicDT_MRRu6_Ta4GjqOGO9zuOp0o_ePgvR-7nA0fbaspM4LZNrPZwmoYBCJMtKXetg68ylu2DO-RRSN2SSh1AIZSA_8UTABk69bPzNL31j4PyZWxrgZ3zP9uZvzggveuKt5ZhCMoB7AoGBAKO9oC2AZjLdh2RaEFotTL_dY6lVcm38VA6PnigB8gB_TMuSrd4xtRw5BxvHpOCnBcUAJE0dN4_DDe5mrotKYMD2_3_lcq9PaLZadrPDCSDL89wtoVxNQNAJTqFjBFXYNu4Ze63lrsqg45TF5XmVRemyBHzXw3erd0pJaeoUDaSPAoGAJhGoHx_nVw8sDoLzeRkOJ1_6-uh_wVmVr6407_LPjrrySEq-GiYu43M3-QDp8J_J9e3S1Rpm4nQX2bEf5Gx9n4wKz7Hp0cwkOqBOWhvrAu6YLpv59wslEtkx0LYcJy6yQk5mpU8l29rPO7b50NyLnfnE2za-9DyK038FKlr5VgICgYAUd7QFsAzGW7Dsi0ILRamX-6x1Kq5Nv4qB0fPFAD5AD-mZclW7xjajhyDjePScFOC4oASJo6bx-GG9zNXRaUwYHt_v_K5V6e0Wy07WeGEkGX57hbQriagaASnULGCKuwbdwy91vLXZVBxymLyvMqi9NkCPmvhu9W7pSS09QoG0kgKBgBYGASHb7oB42sozkpfcSwsalD-B4QuB-QccTgaf5iKN3X6bXA0dRwx3udx1OlH7x8F6P3c4Gj7bVlJnBbJtZ7OE1DAIRJlpS71sHXmUt2wZ3yKKRuySUOoBDKQH_iiYAMnXrZ-Zpe-sfB-TK2NcDO-Z_tzN-cEF71xVvLMIRlAPAoGAdeikZPh1O57RxnVY72asiMRZheMBhK-9uSNPyYEZv3bUnIjg4XdMYStF2yTHNu014XvkDSQTe-drv2BDs9ExKplM4xFOtDtPQQ3mMB3GoK1qVhM_9n1QEElreurMicahkalnPo6tU4Z6PFL7PTpjRnCN67lJp0J0fxNDL13YSagCgYBA9VJrMtPjzcAx5ZCIYJjrYUPqEG_ttQN2RJIHN3MVpdpLAMIgX3tnlfyLwQFVKK45D1JgFa_1HHcxTWGtdIX4nsIjPWt-cWCCCkkw9rM5_Iqcb-YLSood6IP2OK0w0XLD1STnFRy_BRwdjPbGOYmp6YrJDZAlajDkFSdRvsz9Vg=="),
+                                0);
+        NRw::TRwPrivateKey priv2(Base64Decode("MIIEnAKCAQEA4RATOfumLD1n6ICrW5biaAl9VldinczmkNPjpUWwc3gs8PnkCrtdnPFmpBwW3gjHdSNU1OuEg5A6K1o1xiGv9sU-jd88zQBOdK6E2zwnJnkK6bNusKE2H2CLqg3aMWCmTa9JbzSy1uO7wa-xCqqNUuCko-2lyv12HhL1ICIH951SHDa4qO1U5xZhhlUAnqWi9R4tYDeMiF41WdOjwT2fg8UkbusThmxa3yjCXjD7OyjshPtukN8Tl3UyGtV_s2CLnE3f28VAi-AVW8FtgL22xbGhuyEplXRrtF1E5oV7NSqxH1FS0SYROA8ffYQGV5tfx5WDFHiXDEP6BzoVfeBDRQKBgQDzidelKZNFMWar_yj-r_cniMkZXNaNVEQbMg1A401blGjkU1r-ufGH5mkdNx4IgEoCEYBTM834Z88fYV1lOVfdT0OqtiVoC9NkLu3xhQ1r9_r6RMaAenwsV7leH8jWMOKvhkB0KNI49oznTGDqLp0AbDbtP66xdNH4dr3rw3WFywKBgQDslDdv4sdnRKN27h2drhn4Pp_Lgw2U-6MfHiyjp6BKR8Qtlld3hdb-ZjU9F0h38DqECmFIEe35_flKfd7X21CBQs9EuKR8EdaF3OAgzA-TRWeQhyHmaV7Fas1RlNqZHm8lckaZT8dX9Ygsxn0I_vUbm9pkFivwGvQnnwNQ7Te5LwKBgCVMYOzLHW911l6EbCZE6XU2HUrTKEd1bdqWCgtxPEmDl3BZcXpnyKpqSHmlH1F7s65WBfejxDM2hjin3OnXSog_x35ql_-Azu93-79QAzbQc6Z13BuWPpQxV8iw4ijqRRhzjD2pcvXlIxgebp5-H0eDt-Md2Y8rkrzyhm8EH7mwAoGAHZKG7fxY7OiUbt3Ds7XDPwfT-XBhsp90Y-PFlHT0CUj4hbLK7vC638zGp6LpDv4HUIFMKQI9vz-_KU-72vtqEChZ6JcUj4I60LucBBmB8mis8hDkPM0r2K1ZqjKbUyPN5K5I0yn46v6xBZjPoR_eo3N7TILFfgNehPPgah2m9yYCgYAecTr0pTJopizVf-Uf1f7k8RkjK5rRqoiDZkGoHGmrco0cimtf1z4w_M0jpuPBEAlAQjAKZnm_DPnj7Cuspyr7qeh1VsStAXpshd2-MKGtfv9fSJjQD0-Fivcrw_kaxhxV8MgOhRpHHtGc6YwdRdOgDYbdp_XWLpo_Dte9eG6wuQKBgDzo0e8d8pTyvCP23825rVzvrSHBZkliGkCEu0iggDnfKOreejFhQN9JeBo8sYdQFCRBptEU6k4b5O6J3NQ1Sspiez15ddqmFMD4uhJY6VsV-JFnL9YhLqVd355xZCyU4b07mReU9-LuqK2m2chjxH_HDAgUoEvO_yzR9EDYqHbNAoGAf529Ah9HIT5aG6IGTlwQdk-M7guy63U4vj4uC7z98qgvFEsV6cr4miT6RE8Aw5yAeN5pW59rZNjBNr9i-8n8kouasho2xNMTPKP8YuSNg2PNNS5T1Ou56mgsBCY5i10TIHKNIm2RVSUgzJ97BMEOZY6jQRytFfwgYkvnFzbuA9c="),
+                                 0);
+        NRw::TRwPrivateKey priv3(Base64Decode("MIICVAKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NAkEAg1xBDL_UkHy347HwioMscJFP-6eKeim3LoG9rd1EvOycxkoStZ4299OdyzzEXC9cjLdq401BXe-LairiMUgZawJBALn5ziBCc2ycMaYjZDon2EN55jBEe0tJdUy4mOi0ozTV9OLcBANds0nMYPjZFOY3QymzU0LcOa_An3JknI0C2ucCQGxtwTb3h7ux5Ld8jkeRYzkNoB2Y6Is5fqCYVRIJZmz0IcQFb2iW0EX92U7_BpgVuKlvSDTP9LuaxuPfmY6WXEECQBc_OcQITm2ThjTEbIdE-whvPMYIj2lpLqmXEx0WlGaavpxbgIBrtmk5jB8bIpzG6GU2amhbhzX4E-5Mk5GgW10CQBBriCGX-pIPlvx2PhFQZY4SKf908U9FNuXQN7W7qJedk5jJQlazxt76c7lnmIuF65GW7VxpqCu98W1FXEYpAy0CQG-lpihdvxaZ8SkHqNFZGnXhELT2YesLs7GehZSTwuUwx1iTpVm88PVROLYBDZqoGM316s9aZEJBALe5zEpxQTQCQQCDMszX1cQlbBCP08isuMQ2ac3S-qNd0mfRXDCRfMm4s7iuJ5MeHU3uPUVlA_MR4ULRbg1d97TGio912z4KPgjE"),
+                                 0);
+
+        UNIT_ASSERT_EXCEPTION(NRw::TRwPrivateKey("asdzxcv", 0), yexception);
+        UNIT_ASSERT_EXCEPTION(NRw::TRwPrivateKey(Base64Decode("AKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NAkEAg1xBDL_UkHy347HwioMscJFP-6eKeim3LoG9rd1EvOycxkoStZ4299OdyzzEXC9cjLdq401BXe-LairiMUgZawJBALn5ziBCc2ycMaYjZDon2EN55jBEe0tJdUy4mOi0ozTV9OLcBANds0nMYPjZFOY3QymzU0LcOa_An3JknI0C2ucCQGxtwTb3h7ux5Ld8jkeRYzkNoB2Y6Is5fqCYVRIJZmz0IcQFb2iW0EX92U7_BpgVuKlvSDTP9LuaxuPfmY6WXEECQBc_OcQITm2ThjTEbIdE-whvPMYIj2lpLqmXEx0WlGaavpxbgIBrtmk5jB8bIpzG6GU2amhbhzX4E-5Mk5GgW10CQBBriCGX-pIPlvx2PhFQZY4SKf908U9FNuXQN7W7qJedk5jJQlazxt76c7lnmIuF65GW7VxpqCu98W1FXEYpAy0CQG-lpihdvxaZ8SkHqNFZGnXhELT2YesLs7GehZSTwuUwx1iTpVm88PVROLYBDZqoGM316s9aZEJBALe5zEpxQTQCQQCDMszX1cQlbBCP08isuMQ2ac3S-qNd0mfRXDCRfMm4s7iuJ5MeHU3uPUVlA_MR4ULRbg1d97TGio912z4KP"),
+                                                 0),
+                              yexception);
+
+        UNIT_ASSERT(!priv.SignTicket("").empty());
+    }
+
+    Y_UNIT_TEST(TKeysPub) {
+        NRw::TRwPublicKey pub(Base64Decode("MIIBBAKCAQBwsRd4frsVARIVSfj_vCdfvA3Q9SsGhSybdBDhbm8L6rPqxdoSNLCdNXzDWj7Ppf0o8uWHMxC-5Lfw0I18ri68nhm9-ndixcnbn6ti1uetgkc28eiEP6Q8ILD_JmkynbUl1aKDNAa5XsK2vFSEX402uydRomsTn46kRY23hfqcIi0ohh5VxIrpclRsRZus0JFu-RJzhqTbKYV4y4dglWPGHh5BuTv9k_Oh0_Ra8Xp5Rith5vjaKZUQ5Hyh9UtBYTkNWdvXP9OpmbiLVeRLuMzBm4HEFHDwMZ1h6LSVP-wB_spJPaMLTn3Q3JIHe-wGBYRWzU51RRYDqv4O_H12w5C1"));
+        NRw::TRwPublicKey pub2(Base64Decode("MIIBBQKCAQEA4RATOfumLD1n6ICrW5biaAl9VldinczmkNPjpUWwc3gs8PnkCrtdnPFmpBwW3gjHdSNU1OuEg5A6K1o1xiGv9sU-jd88zQBOdK6E2zwnJnkK6bNusKE2H2CLqg3aMWCmTa9JbzSy1uO7wa-xCqqNUuCko-2lyv12HhL1ICIH951SHDa4qO1U5xZhhlUAnqWi9R4tYDeMiF41WdOjwT2fg8UkbusThmxa3yjCXjD7OyjshPtukN8Tl3UyGtV_s2CLnE3f28VAi-AVW8FtgL22xbGhuyEplXRrtF1E5oV7NSqxH1FS0SYROA8ffYQGV5tfx5WDFHiXDEP6BzoVfeBDRQ=="));
+        NRw::TRwPublicKey pub3(Base64Decode("MIGDAoGAX23ZgkYAmRFEWrp9aGLebVMVbVQ4TR_pmt9iEcCSmoaUqWHRBV95M0-l4mGLvnFfMJ7qhF5FSb7QNuoM2FNKELu4ZS_Ug1idEFBYfoT7kVzletsMVK4ZDDYRiM18fL8d58clfFAoCo-_EEMowqQeBXnxa0zqsLyNGL2x1f-KDY0="));
+
+        UNIT_ASSERT_EXCEPTION(NRw::TRwPublicKey("asdzxcv"), yexception);
+        UNIT_ASSERT_EXCEPTION(NRw::TRwPublicKey(Base64Decode("AoGAX23ZgkYAmRFEWrp9aGLebVMVbVQ4TR_pmt9iEcCSmoaUqWHRBV95M0-l4mGLvnFfMJ7qhF5FSb7QNuoM2FNKELu4ZS_Ug1idEFBYfoT7kVzletsMVK40")), yexception);
+
+        UNIT_ASSERT(!pub.CheckSign("~~~", "~~~"));
+    }
+
+    Y_UNIT_TEST(TKeys) {
+        NRw::TRwPrivateKey priv(Base64Decode("MIIEmwKCAQBwsRd4frsVARIVSfj_vCdfvA3Q9SsGhSybdBDhbm8L6rPqxdoSNLCdNXzDWj7Ppf0o8uWHMxC-5Lfw0I18ri68nhm9-ndixcnbn6ti1uetgkc28eiEP6Q8ILD_JmkynbUl1aKDNAa5XsK2vFSEX402uydRomsTn46kRY23hfqcIi0ohh5VxIrpclRsRZus0JFu-RJzhqTbKYV4y4dglWPGHh5BuTv9k_Oh0_Ra8Xp5Rith5vjaKZUQ5Hyh9UtBYTkNWdvXP9OpmbiLVeRLuMzBm4HEFHDwMZ1h6LSVP-wB_spJPaMLTn3Q3JIHe-wGBYRWzU51RRYDqv4O_H12w5C1AoGBALAwCQ7fdAPG1lGclL7iWFjUofwPCFwPyDjicDT_MRRu6_Ta4GjqOGO9zuOp0o_ePgvR-7nA0fbaspM4LZNrPZwmoYBCJMtKXetg68ylu2DO-RRSN2SSh1AIZSA_8UTABk69bPzNL31j4PyZWxrgZ3zP9uZvzggveuKt5ZhCMoB7AoGBAKO9oC2AZjLdh2RaEFotTL_dY6lVcm38VA6PnigB8gB_TMuSrd4xtRw5BxvHpOCnBcUAJE0dN4_DDe5mrotKYMD2_3_lcq9PaLZadrPDCSDL89wtoVxNQNAJTqFjBFXYNu4Ze63lrsqg45TF5XmVRemyBHzXw3erd0pJaeoUDaSPAoGAJhGoHx_nVw8sDoLzeRkOJ1_6-uh_wVmVr6407_LPjrrySEq-GiYu43M3-QDp8J_J9e3S1Rpm4nQX2bEf5Gx9n4wKz7Hp0cwkOqBOWhvrAu6YLpv59wslEtkx0LYcJy6yQk5mpU8l29rPO7b50NyLnfnE2za-9DyK038FKlr5VgICgYAUd7QFsAzGW7Dsi0ILRamX-6x1Kq5Nv4qB0fPFAD5AD-mZclW7xjajhyDjePScFOC4oASJo6bx-GG9zNXRaUwYHt_v_K5V6e0Wy07WeGEkGX57hbQriagaASnULGCKuwbdwy91vLXZVBxymLyvMqi9NkCPmvhu9W7pSS09QoG0kgKBgBYGASHb7oB42sozkpfcSwsalD-B4QuB-QccTgaf5iKN3X6bXA0dRwx3udx1OlH7x8F6P3c4Gj7bVlJnBbJtZ7OE1DAIRJlpS71sHXmUt2wZ3yKKRuySUOoBDKQH_iiYAMnXrZ-Zpe-sfB-TK2NcDO-Z_tzN-cEF71xVvLMIRlAPAoGAdeikZPh1O57RxnVY72asiMRZheMBhK-9uSNPyYEZv3bUnIjg4XdMYStF2yTHNu014XvkDSQTe-drv2BDs9ExKplM4xFOtDtPQQ3mMB3GoK1qVhM_9n1QEElreurMicahkalnPo6tU4Z6PFL7PTpjRnCN67lJp0J0fxNDL13YSagCgYBA9VJrMtPjzcAx5ZCIYJjrYUPqEG_ttQN2RJIHN3MVpdpLAMIgX3tnlfyLwQFVKK45D1JgFa_1HHcxTWGtdIX4nsIjPWt-cWCCCkkw9rM5_Iqcb-YLSood6IP2OK0w0XLD1STnFRy_BRwdjPbGOYmp6YrJDZAlajDkFSdRvsz9Vg=="),
+                                0);
+        NRw::TRwPublicKey pub(Base64Decode("MIIBBAKCAQBwsRd4frsVARIVSfj_vCdfvA3Q9SsGhSybdBDhbm8L6rPqxdoSNLCdNXzDWj7Ppf0o8uWHMxC-5Lfw0I18ri68nhm9-ndixcnbn6ti1uetgkc28eiEP6Q8ILD_JmkynbUl1aKDNAa5XsK2vFSEX402uydRomsTn46kRY23hfqcIi0ohh5VxIrpclRsRZus0JFu-RJzhqTbKYV4y4dglWPGHh5BuTv9k_Oh0_Ra8Xp5Rith5vjaKZUQ5Hyh9UtBYTkNWdvXP9OpmbiLVeRLuMzBm4HEFHDwMZ1h6LSVP-wB_spJPaMLTn3Q3JIHe-wGBYRWzU51RRYDqv4O_H12w5C1"));
+
+        const TString data = "my magic data";
+
+        UNIT_ASSERT(pub.CheckSign(data, priv.SignTicket(data)));
+        UNIT_ASSERT(!pub.CheckSign("~~~~" + data, priv.SignTicket(data)));
+        UNIT_ASSERT(!pub.CheckSign(data, "~~~~" + priv.SignTicket(data)));
+
+        UNIT_ASSERT(pub.CheckSign(data,
+                                  Base64Decode("EC5hZunmK3hOJZeov_XlNIXcwj5EsgX94lMd-tQJTNUO4NR6bCO7qQkKjEeFJmI2QFYXGY-iSf9WeMJ_brECAMyYAix-L8sZqcMPXD945QgkPsNQKyC0DX9FkgfSh6ZKkA-UvFSHrkn3QbeE9omk3-yXpqR-M8DlVqmp3mwdYlYRq0NdfTaD3AMXVA4aZTbW3OmhJoLJ8AxJ3w1oG5q_lk8dpW9vvqfIzsfPABme6sY5XyPmsjYaRDf9z4ZJgR-wTkG06_N_YzIklS5T2s_4FUKLz5gLMhsnVlNUpgZyRN9sXTAn9-zMJnCwAC8WRgykWnljPGDDJCjk-Xwsg7AOLQ==")));
+        UNIT_ASSERT(pub.CheckSign(data,
+                                  Base64Decode("JbHSn1QEQeOEvzyt-LpawbQv4vPEEE05bWhjB2-MkoV-tyq9FykSqGqhP3ZFc1_FPrqguwEYrHibI2l5w3q8wnI1fcyRUoNuJxmBSzf2f_Uzn9ZoUSc7D9pTGSvK_hhZoL4YMc_VfbdEdnDuvHZNlZyaDPH9EbmUqyXjnXTEwRoK0fAU1rhlHvSZvnp0ctVBWSkaQsaU8dJTKDBtIQVP1D5Py2pKB2NBF_Ytz2thWt7iLjbTyjtis6DC-JKwjFBqv6nQf42sKalHQqWFuIvBCIfNUswEw4_sGfwWVSBBmFplf7FmD7sN8znUahYUPGCe1uFNly6WwpPJsm8VtiU80g==")));
+        UNIT_ASSERT(pub.CheckSign(data,
+                                  Base64Decode("FeMZtDP-yuoNqK2HYw3JxTV9v7p8IoQEuRMtuHddafh4bq1ZOeEqg7g7Su6M3iq_kN9DZ_fVhuhuVcbZmNYPIvJ8oL5DE80KI3d1Qbs9mS8_X4Oq2TJpZgNfFG-z_LPRZSNRP9Q8sQhlAoSZHOSZkBFcYj1EuqEp6nSSSbX8Ji4Se-TfhIh3YFQkr-Ivk_3NmSXhDXUaW7CHo2rVm58QJ2cgSEuxzBH-Q8E8tGDCEmk4p3_iot9XY8RRN-_j0yi15etmXCUIKFbpDogtHdT8CyAEVHMYvsLqkLux9pzy3RdvNQmoPjol3wIm-H0wMtF_pMw4G2QLNev6he6xWeckxw==")));
+    }
+
+    Y_UNIT_TEST(Keygen) {
+        for (size_t idx = 0; idx < 100; ++idx) {
+            NRw::TKeyPair pair = NRw::GenKeyPair(1024);
+            NRw::TRwPrivateKey priv(pair.Private, 0);
+            NRw::TRwPublicKey pub(pair.Public);
+
+            const TString data = "my magic data";
+            TStringStream s;
+            s << "data='" << data << "'.";
+            s << "private='" << Base64Encode(pair.Private) << "'.";
+            s << "public='" << Base64Encode(pair.Public) << "'.";
+            TString sign;
+            UNIT_ASSERT_NO_EXCEPTION_C(sign = priv.SignTicket(data), s.Str());
+            s << "sign='" << Base64Encode(sign) << "'.";
+            UNIT_ASSERT_C(pub.CheckSign(data, sign), s.Str());
+        }
+    }
+}
diff --git a/library/cpp/tvmauth/src/rw/ut_large/gen/main.cpp b/library/cpp/tvmauth/src/rw/ut_large/gen/main.cpp
new file mode 100644
index 0000000000..31a599c996
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/ut_large/gen/main.cpp
@@ -0,0 +1,32 @@
+#include <library/cpp/tvmauth/src/rw/keys.h>
+
+#include <library/cpp/string_utils/base64/base64.h>
+
+#include <util/generic/yexception.h>
+
+using namespace NTvmAuth;
+
+const TString DATA = "my magic data";
+
+int main(int, char**) {
+    const NRw::TKeyPair pair = NRw::GenKeyPair(1024);
+    const NRw::TRwPrivateKey priv(pair.Private, 0);
+    const NRw::TRwPublicKey pub(pair.Public);
+
+    Cout << "data='" << DATA << "'."
+         << "private='" << Base64Encode(pair.Private) << "'."
+         << "public='" << Base64Encode(pair.Public) << "'.";
+
+    TString sign;
+    try {
+        sign = priv.SignTicket(DATA);
+        Cout << "sign='" << Base64Encode(sign) << "'.";
+        Y_ENSURE(pub.CheckSign(DATA, sign));
+    } catch (const std::exception& e) {
+        Cout << "what='" << e.what() << "'" << Endl;
+        return 1;
+    }
+    Cout << Endl;
+
+    return 0;
+}
diff --git a/library/cpp/tvmauth/src/rw/ut_large/test.py b/library/cpp/tvmauth/src/rw/ut_large/test.py
new file mode 100644
index 0000000000..0cf95d9848
--- /dev/null
+++ b/library/cpp/tvmauth/src/rw/ut_large/test.py
@@ -0,0 +1,35 @@
+from __future__ import print_function
+
+import os
+import subprocess
+import sys
+
+import yatest.common as yc
+
+
+def test_fuzzing():
+    errfile = './errfile'
+    outfile = './outfile'
+    env = os.environ.copy()
+
+    for number in range(25000):
+        with open(errfile, 'w') as fe:
+            with open(outfile, 'w') as fo:
+                p = subprocess.Popen(
+                    [
+                        yc.build_path('library/cpp/tvmauth/src/rw/ut_large/gen/gen'),
+                    ],
+                    env=env,
+                    stdout=fo,
+                    stderr=fe,
+                )
+                code = p.wait()
+
+        with open(errfile) as fe:
+            all = fe.read()
+            if all != '':
+                with open(outfile) as fo:
+                    print(fo.read(), file=sys.stderr)
+                assert all == ''
+
+        assert code == 0
diff --git a/library/cpp/tvmauth/src/service_impl.cpp b/library/cpp/tvmauth/src/service_impl.cpp
new file mode 100644
index 0000000000..463b5d634c
--- /dev/null
+++ b/library/cpp/tvmauth/src/service_impl.cpp
@@ -0,0 +1,204 @@
+#include "service_impl.h"
+
+#include "parser.h"
+#include "utils.h"
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <util/generic/strbuf.h>
+#include <util/string/cast.h>
+#include <util/string/split.h>
+
+namespace NTvmAuth {
+    static const char* EX_MSG = "Method cannot be used in non-valid ticket";
+
+    TCheckedServiceTicket::TImpl::operator bool() const {
+        return (Status_ == ETicketStatus::Ok);
+    }
+
+    TTvmId TCheckedServiceTicket::TImpl::GetDst() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.service().dstclientid();
+    }
+
+    TTvmId TCheckedServiceTicket::TImpl::GetSrc() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.service().srcclientid();
+    }
+
+    const TScopes& TCheckedServiceTicket::TImpl::GetScopes() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        if (CachedScopes_.empty()) {
+            for (const auto& el : ProtobufTicket_.service().scopes()) {
+                CachedScopes_.push_back(el);
+            }
+        }
+        return CachedScopes_;
+    }
+
+    bool TCheckedServiceTicket::TImpl::HasScope(TStringBuf scopeName) const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return std::binary_search(ProtobufTicket_.service().scopes().begin(), ProtobufTicket_.service().scopes().end(), scopeName);
+    }
+
+    ETicketStatus TCheckedServiceTicket::TImpl::GetStatus() const {
+        return Status_;
+    }
+
+    time_t TCheckedServiceTicket::TImpl::GetExpirationTime() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.expirationtime();
+    }
+
+    TString TCheckedServiceTicket::TImpl::DebugInfo() const {
+        if (CachedDebugInfo_) {
+            return CachedDebugInfo_;
+        }
+
+        if (Status_ == ETicketStatus::Malformed) {
+            CachedDebugInfo_ = "status=malformed;";
+            return CachedDebugInfo_;
+        }
+
+        TString targetString = "ticket_type=";
+        targetString.reserve(256);
+        if (Status_ == ETicketStatus::InvalidTicketType) {
+            targetString.append("not-serv;");
+            CachedDebugInfo_ = targetString;
+            return targetString;
+        }
+
+        targetString.append("serv");
+        if (ProtobufTicket_.has_expirationtime())
+            targetString.append(";expiration_time=").append(IntToString<10>(ProtobufTicket_.expirationtime()));
+        if (ProtobufTicket_.service().has_srcclientid()) {
+            targetString.append(";src=").append(IntToString<10>(ProtobufTicket_.service().srcclientid()));
+        }
+        if (ProtobufTicket_.service().has_dstclientid()) {
+            targetString.append(";dst=").append(IntToString<10>(ProtobufTicket_.service().dstclientid()));
+        }
+        for (const auto& scope : ProtobufTicket_.service().scopes()) {
+            targetString.append(";scope=").append(scope);
+        }
+        if (ProtobufTicket_.service().has_issueruid()) {
+            targetString.append(";issuer_uid=").append(IntToString<10>(ProtobufTicket_.service().GetissuerUid()));
+        }
+        targetString.append(";");
+
+        CachedDebugInfo_ = targetString;
+        return targetString;
+    }
+
+    TMaybe<TUid> TCheckedServiceTicket::TImpl::GetIssuerUid() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.service().has_issueruid()
+                   ? ProtobufTicket_.service().GetissuerUid()
+                   : TMaybe<TUid>();
+    }
+
+    void TCheckedServiceTicket::TImpl::SetStatus(ETicketStatus status) {
+        Status_ = status;
+    }
+
+    TCheckedServiceTicket::TImpl::TImpl(ETicketStatus status, ticket2::Ticket&& protobufTicket)
+        : Status_(status)
+        , ProtobufTicket_(std::move(protobufTicket))
+    {
+    }
+
+    TServiceTicketImplPtr TCheckedServiceTicket::TImpl::CreateTicketForTests(ETicketStatus status,
+                                                                             TTvmId src,
+                                                                             TMaybe<TUid> issuerUid) {
+        ticket2::Ticket proto;
+        proto.mutable_service()->set_srcclientid(src);
+        proto.mutable_service()->set_dstclientid(100500);
+        if (issuerUid) {
+            proto.mutable_service()->set_issueruid(*issuerUid);
+        }
+        return MakeHolder<TImpl>(status, std::move(proto));
+    }
+
+    TServiceContext::TImpl::TImpl(TStringBuf secretBase64, TTvmId selfTvmId, TStringBuf tvmKeysResponse)
+        : Secret_(ParseSecret(secretBase64))
+        , SelfTvmId_(selfTvmId)
+    {
+        ResetKeys(tvmKeysResponse);
+    }
+
+    TServiceContext::TImpl::TImpl(TTvmId selfTvmId, TStringBuf tvmKeysResponse)
+        : SelfTvmId_(selfTvmId)
+    {
+        ResetKeys(tvmKeysResponse);
+    }
+
+    TServiceContext::TImpl::TImpl(TStringBuf secretBase64)
+        : Secret_(ParseSecret(secretBase64))
+    {
+    }
+
+    void TServiceContext::TImpl::ResetKeys(TStringBuf tvmKeysResponse) {
+        tvm_keys::Keys protoKeys;
+        if (!protoKeys.ParseFromString(TParserTvmKeys::ParseStrV1(tvmKeysResponse))) {
+            ythrow TMalformedTvmKeysException() << "Malformed TVM keys";
+        }
+
+        NRw::TPublicKeys keys;
+        for (int idx = 0; idx < protoKeys.tvm_size(); ++idx) {
+            const tvm_keys::TvmKey& k = protoKeys.tvm(idx);
+            keys.emplace(k.gen().id(),
+                         k.gen().body());
+        }
+
+        if (keys.empty()) {
+            ythrow TEmptyTvmKeysException() << "Empty TVM keys";
+        }
+
+        Keys_ = std::move(keys);
+    }
+
+    TServiceTicketImplPtr TServiceContext::TImpl::Check(TStringBuf ticketBody, const TServiceContext::TCheckFlags& flags) const {
+        Y_ENSURE_EX(!Keys_.empty(), TEmptyTvmKeysException() << "Empty TVM keys");
+
+        TParserTickets::TRes res = TParserTickets::ParseV3(ticketBody, Keys_, TParserTickets::ServiceFlag());
+
+        if (res.Status != ETicketStatus::Ok) {
+            return MakeHolder<TCheckedServiceTicket::TImpl>(res.Status, std::move(res.Ticket));
+        }
+
+        if (!res.Ticket.has_service()) {
+            return MakeHolder<TCheckedServiceTicket::TImpl>(ETicketStatus::Malformed, std::move(res.Ticket));
+        }
+
+        if (flags.NeedDstCheck && SelfTvmId_ != res.Ticket.service().dstclientid()) {
+            return MakeHolder<TCheckedServiceTicket::TImpl>(ETicketStatus::InvalidDst, std::move(res.Ticket));
+        }
+
+        return MakeHolder<TCheckedServiceTicket::TImpl>(ETicketStatus::Ok, std::move(res.Ticket));
+    }
+
+    TString TServiceContext::TImpl::SignCgiParamsForTvm(TStringBuf ts, TStringBuf dst, TStringBuf scopes) const {
+        if (Secret_.Value().empty()) {
+            ythrow TMalformedTvmSecretException() << "Malformed TVM secret: it is empty";
+        }
+        return NUtils::SignCgiParamsForTvm(Secret_, ts, dst, scopes);
+    }
+
+    TString TServiceContext::TImpl::ParseSecret(TStringBuf secretBase64) {
+        while (secretBase64 && secretBase64.back() == '\n') {
+            secretBase64.Chop(1);
+        }
+
+        if (secretBase64.empty()) {
+            ythrow TMalformedTvmSecretException() << "Malformed TVM secret: it is empty";
+        }
+
+        const TString secret = NUtils::Base64url2bin(secretBase64);
+        if (secret.empty()) {
+            ythrow TMalformedTvmSecretException() << "Malformed TVM secret: invalid base64url";
+        }
+
+        return secret;
+    }
+
+}
diff --git a/library/cpp/tvmauth/src/service_impl.h b/library/cpp/tvmauth/src/service_impl.h
new file mode 100644
index 0000000000..26202f283e
--- /dev/null
+++ b/library/cpp/tvmauth/src/service_impl.h
@@ -0,0 +1,77 @@
+#pragma once
+
+#include <library/cpp/tvmauth/src/protos/ticket2.pb.h>
+#include <library/cpp/tvmauth/src/protos/tvm_keys.pb.h>
+#include <library/cpp/tvmauth/src/rw/keys.h>
+
+#include <library/cpp/tvmauth/type.h>
+#include <library/cpp/tvmauth/deprecated/service_context.h>
+
+#include <library/cpp/charset/ci_string.h>
+#include <library/cpp/string_utils/secret_string/secret_string.h>
+
+#include <util/generic/maybe.h>
+
+#include <string>
+
+namespace NTvmAuth {
+    using TServiceTicketImplPtr = THolder<TCheckedServiceTicket::TImpl>;
+    class TCheckedServiceTicket::TImpl {
+    public:
+        explicit operator bool() const;
+
+        TTvmId GetDst() const;
+        TTvmId GetSrc() const;
+        const TScopes& GetScopes() const;
+        bool HasScope(TStringBuf scopeName) const;
+        ETicketStatus GetStatus() const;
+        time_t GetExpirationTime() const;
+
+        TString DebugInfo() const;
+        TMaybe<TUid> GetIssuerUid() const;
+
+        void SetStatus(ETicketStatus status);
+
+        /*!
+         * Constructor for creation invalid ticket storing error status in TServiceContext
+         * @param status
+         * @param protobufTicket
+         */
+        TImpl(ETicketStatus status, ticket2::Ticket&& protobufTicket);
+
+        static TServiceTicketImplPtr CreateTicketForTests(ETicketStatus status,
+                                                          TTvmId src,
+                                                          TMaybe<TUid> issuerUid);
+
+    private:
+        ETicketStatus Status_;
+        ticket2::Ticket ProtobufTicket_;
+        mutable TScopes CachedScopes_;
+        mutable TString CachedDebugInfo_;
+    };
+
+    class TServiceContext::TImpl {
+    public:
+        TImpl(TStringBuf secretBase64, TTvmId selfTvmId, TStringBuf tvmKeysResponse);
+        TImpl(TTvmId selfTvmId, TStringBuf tvmKeysResponse);
+        TImpl(TStringBuf secretBase64);
+
+        void ResetKeys(TStringBuf tvmKeysResponse);
+
+        TServiceTicketImplPtr Check(TStringBuf ticketBody, const TServiceContext::TCheckFlags& flags = {}) const;
+        TString SignCgiParamsForTvm(TStringBuf ts, TStringBuf dst, TStringBuf scopes = TStringBuf()) const;
+
+        const NRw::TPublicKeys& GetKeys() const { // for tests
+            return Keys_;
+        }
+
+    private:
+        static TString ParseSecret(TStringBuf secretBase64);
+
+        NRw::TPublicKeys Keys_;
+        const NSecretString::TSecretString Secret_;
+        const TTvmId SelfTvmId_ = 0;
+
+        ::google::protobuf::LogSilencer LogSilencer_;
+    };
+}
diff --git a/library/cpp/tvmauth/src/service_ticket.cpp b/library/cpp/tvmauth/src/service_ticket.cpp
new file mode 100644
index 0000000000..9716836cf5
--- /dev/null
+++ b/library/cpp/tvmauth/src/service_ticket.cpp
@@ -0,0 +1,46 @@
+#include "service_impl.h"
+
+#include <library/cpp/tvmauth/checked_service_ticket.h>
+
+namespace NTvmAuth {
+    static const char* EX_MSG = "Ticket already moved out";
+
+    TCheckedServiceTicket::TCheckedServiceTicket(THolder<TImpl> impl)
+        : Impl_(std::move(impl))
+    {
+    }
+
+    TCheckedServiceTicket::TCheckedServiceTicket(TCheckedServiceTicket&& o) = default;
+    TCheckedServiceTicket& TCheckedServiceTicket::operator=(TCheckedServiceTicket&& o) = default;
+    TCheckedServiceTicket::~TCheckedServiceTicket() = default;
+
+    TCheckedServiceTicket::operator bool() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->operator bool();
+    }
+
+    TTvmId TCheckedServiceTicket::GetDst() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetDst();
+    }
+
+    TTvmId TCheckedServiceTicket::GetSrc() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetSrc();
+    }
+
+    ETicketStatus TCheckedServiceTicket::GetStatus() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetStatus();
+    }
+
+    TString TCheckedServiceTicket::DebugInfo() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->DebugInfo();
+    }
+
+    TMaybe<TUid> TCheckedServiceTicket::GetIssuerUid() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetIssuerUid();
+    }
+}
diff --git a/library/cpp/tvmauth/src/status.cpp b/library/cpp/tvmauth/src/status.cpp
new file mode 100644
index 0000000000..1b08fc098f
--- /dev/null
+++ b/library/cpp/tvmauth/src/status.cpp
@@ -0,0 +1,32 @@
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <util/generic/yexception.h>
+
+namespace NTvmAuth {
+    TStringBuf StatusToString(ETicketStatus st) {
+        switch (st) {
+            case ETicketStatus::Ok:
+                return "OK";
+            case ETicketStatus::Expired:
+                return "Expired ticket";
+            case ETicketStatus::InvalidBlackboxEnv:
+                return "Invalid BlackBox environment";
+            case ETicketStatus::InvalidDst:
+                return "Invalid ticket destination";
+            case ETicketStatus::InvalidTicketType:
+                return "Invalid ticket type";
+            case ETicketStatus::Malformed:
+                return "Malformed ticket";
+            case ETicketStatus::MissingKey:
+                return "Context does not have required key to check ticket: public keys are too old";
+            case ETicketStatus::SignBroken:
+                return "Invalid ticket signature";
+            case ETicketStatus::UnsupportedVersion:
+                return "Unsupported ticket version";
+            case ETicketStatus::NoRoles:
+                return "Subject (src or defaultUid) does not have any roles in IDM";
+        }
+
+        ythrow yexception() << "Unexpected status: " << static_cast<int>(st);
+    }
+}
diff --git a/library/cpp/tvmauth/src/unittest.cpp b/library/cpp/tvmauth/src/unittest.cpp
new file mode 100644
index 0000000000..5133d79ea9
--- /dev/null
+++ b/library/cpp/tvmauth/src/unittest.cpp
@@ -0,0 +1,14 @@
+#include "service_impl.h"
+#include "user_impl.h"
+
+#include <library/cpp/tvmauth/unittest.h>
+
+namespace NTvmAuth::NUnittest {
+    TCheckedServiceTicket CreateServiceTicket(ETicketStatus status, TTvmId src, TMaybe<TUid> issuerUid) {
+        return TCheckedServiceTicket(TCheckedServiceTicket::TImpl::CreateTicketForTests(status, src, issuerUid));
+    }
+
+    TCheckedUserTicket CreateUserTicket(ETicketStatus status, TUid defaultUid, const TScopes& scopes, const TUids& uids, EBlackboxEnv env) {
+        return TCheckedUserTicket(TCheckedUserTicket::TImpl::CreateTicketForTests(status, defaultUid, scopes, uids, env));
+    }
+}
diff --git a/library/cpp/tvmauth/src/user_impl.cpp b/library/cpp/tvmauth/src/user_impl.cpp
new file mode 100644
index 0000000000..4fda799aac
--- /dev/null
+++ b/library/cpp/tvmauth/src/user_impl.cpp
@@ -0,0 +1,241 @@
+#include "user_impl.h"
+
+#include "parser.h"
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <util/generic/strbuf.h>
+#include <util/string/cast.h>
+#include <util/string/split.h>
+
+#include <algorithm>
+
+namespace NTvmAuth {
+    static const char* EX_MSG = "Method cannot be used in non-valid ticket";
+
+    TStringBuf GetBlackboxEnvAsString(EBlackboxEnv environment) {
+        switch (environment) {
+            case (EBlackboxEnv::Prod):
+                return TStringBuf("Prod");
+            case (EBlackboxEnv::Test):
+                return TStringBuf("Test");
+            case (EBlackboxEnv::ProdYateam):
+                return TStringBuf("ProdYateam");
+            case (EBlackboxEnv::TestYateam):
+                return TStringBuf("TestYateam");
+            case (EBlackboxEnv::Stress):
+                return TStringBuf("Stress");
+            default:
+                throw yexception() << "Unknown environment";
+        }
+    }
+
+    TCheckedUserTicket::TImpl::operator bool() const {
+        return (Status_ == ETicketStatus::Ok);
+    }
+
+    TUid TCheckedUserTicket::TImpl::GetDefaultUid() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.user().defaultuid();
+    }
+
+    time_t TCheckedUserTicket::TImpl::GetExpirationTime() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return ProtobufTicket_.expirationtime();
+    }
+
+    const TScopes& TCheckedUserTicket::TImpl::GetScopes() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        if (CachedScopes_.empty()) {
+            for (const auto& el : ProtobufTicket_.user().scopes()) {
+                CachedScopes_.push_back(el);
+            }
+        }
+        return CachedScopes_;
+    }
+
+    bool TCheckedUserTicket::TImpl::HasScope(TStringBuf scopeName) const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        return std::binary_search(ProtobufTicket_.user().scopes().begin(), ProtobufTicket_.user().scopes().end(), scopeName);
+    }
+
+    ETicketStatus TCheckedUserTicket::TImpl::GetStatus() const {
+        return Status_;
+    }
+
+    const TUids& TCheckedUserTicket::TImpl::GetUids() const {
+        Y_ENSURE_EX(bool(*this), TNotAllowedException() << EX_MSG);
+        if (CachedUids_.empty()) {
+            for (const auto& user : ProtobufTicket_.user().users()) {
+                CachedUids_.push_back(user.uid());
+            }
+        }
+        return CachedUids_;
+    }
+
+    TString TCheckedUserTicket::TImpl::DebugInfo() const {
+        if (CachedDebugInfo_) {
+            return CachedDebugInfo_;
+        }
+
+        if (Status_ == ETicketStatus::Malformed) {
+            CachedDebugInfo_ = "status=malformed;";
+            return CachedDebugInfo_;
+        }
+
+        TString targetString = "ticket_type=";
+        targetString.reserve(256);
+        if (Status_ == ETicketStatus::InvalidTicketType) {
+            targetString.append("not-user;");
+            CachedDebugInfo_ = targetString;
+            return targetString;
+        }
+
+        targetString.append("user");
+        if (ProtobufTicket_.expirationtime() > 0)
+            targetString.append(";expiration_time=").append(IntToString<10>(ProtobufTicket_.expirationtime()));
+        for (const auto& scope : ProtobufTicket_.user().scopes()) {
+            targetString.append(";scope=").append(scope);
+        }
+
+        if (ProtobufTicket_.user().defaultuid() > 0)
+            targetString.append(";default_uid=").append(IntToString<10>(ProtobufTicket_.user().defaultuid()));
+        for (const auto& user : ProtobufTicket_.user().users()) {
+            targetString.append(";uid=").append(IntToString<10>(user.uid()));
+        }
+
+        targetString.append(";env=");
+        EBlackboxEnv environment = static_cast<EBlackboxEnv>(ProtobufTicket_.user().env());
+        targetString.append(GetBlackboxEnvAsString(environment));
+        targetString.append(";");
+
+        CachedDebugInfo_ = targetString;
+        return targetString;
+    }
+
+    EBlackboxEnv TCheckedUserTicket::TImpl::GetEnv() const {
+        return (EBlackboxEnv)ProtobufTicket_.user().env();
+    }
+
+    void TCheckedUserTicket::TImpl::SetStatus(ETicketStatus status) {
+        Status_ = status;
+    }
+
+    TCheckedUserTicket::TImpl::TImpl(ETicketStatus status, ticket2::Ticket&& protobufTicket)
+        : Status_(status)
+        , ProtobufTicket_(std::move(protobufTicket))
+    {
+    }
+
+    TUserTicketImplPtr TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus status,
+                                                                       TUid defaultUid,
+                                                                       TScopes scopes,
+                                                                       TUids uids,
+                                                                       EBlackboxEnv env) {
+        auto prepareCont = [](auto& cont) {
+            std::sort(cont.begin(), cont.end());
+            cont.erase(std::unique(cont.begin(), cont.end()), cont.end());
+        };
+        auto erase = [](auto& cont, auto val) {
+            auto it = std::find(cont.begin(), cont.end(), val);
+            if (it != cont.end()) {
+                cont.erase(it);
+            }
+        };
+
+        prepareCont(scopes);
+        erase(scopes, "");
+
+        uids.push_back(defaultUid);
+        prepareCont(uids);
+        erase(uids, 0);
+        Y_ENSURE(!uids.empty(), "User ticket cannot contain empty uid list");
+
+        ticket2::Ticket proto;
+        for (TUid uid : uids) {
+            proto.mutable_user()->add_users()->set_uid(uid);
+        }
+        proto.mutable_user()->set_defaultuid(defaultUid);
+        proto.mutable_user()->set_entrypoint(100500);
+        for (TStringBuf scope : scopes) {
+            proto.mutable_user()->add_scopes(TString(scope));
+        }
+
+        proto.mutable_user()->set_env((tvm_keys::BbEnvType)env);
+
+        return MakeHolder<TImpl>(status, std::move(proto));
+    }
+
+    TUserContext::TImpl::TImpl(EBlackboxEnv env, TStringBuf tvmKeysResponse)
+        : Env_(env)
+    {
+        ResetKeys(tvmKeysResponse);
+    }
+
+    void TUserContext::TImpl::ResetKeys(TStringBuf tvmKeysResponse) {
+        tvm_keys::Keys protoKeys;
+        if (!protoKeys.ParseFromString(TParserTvmKeys::ParseStrV1(tvmKeysResponse))) {
+            ythrow TMalformedTvmKeysException() << "Malformed TVM keys";
+        }
+
+        NRw::TPublicKeys keys;
+        for (int idx = 0; idx < protoKeys.bb_size(); ++idx) {
+            const tvm_keys::BbKey& k = protoKeys.bb(idx);
+            if (IsAllowed(k.env())) {
+                keys.emplace(k.gen().id(),
+                             k.gen().body());
+            }
+        }
+
+        if (keys.empty()) {
+            ythrow TEmptyTvmKeysException() << "Empty TVM keys";
+        }
+
+        Keys_ = std::move(keys);
+    }
+
+    TUserTicketImplPtr TUserContext::TImpl::Check(TStringBuf ticketBody) const {
+        TParserTickets::TRes res = TParserTickets::ParseV3(ticketBody, Keys_, TParserTickets::UserFlag());
+        ETicketStatus status = CheckProtobufUserTicket(res.Ticket);
+
+        if (res.Status != ETicketStatus::Ok && !(res.Status == ETicketStatus::MissingKey && status == ETicketStatus::InvalidBlackboxEnv)) {
+            status = res.Status;
+        }
+        return MakeHolder<TCheckedUserTicket::TImpl>(status, std::move(res.Ticket));
+    }
+
+    ETicketStatus TUserContext::TImpl::CheckProtobufUserTicket(const ticket2::Ticket& ticket) const {
+        if (!ticket.has_user()) {
+            return ETicketStatus::Malformed;
+        }
+        if (!IsAllowed(ticket.user().env())) {
+            return ETicketStatus::InvalidBlackboxEnv;
+        }
+        return ETicketStatus::Ok;
+    }
+
+    const NRw::TPublicKeys& TUserContext::TImpl::GetKeys() const {
+        return Keys_;
+    }
+
+    bool TUserContext::TImpl::IsAllowed(tvm_keys::BbEnvType env) const {
+        if (env == tvm_keys::Prod && (Env_ == EBlackboxEnv::Prod || Env_ == EBlackboxEnv::Stress)) {
+            return true;
+        }
+        if (env == tvm_keys::ProdYateam && Env_ == EBlackboxEnv::ProdYateam) {
+            return true;
+        }
+        if (env == tvm_keys::Test && Env_ == EBlackboxEnv::Test) {
+            return true;
+        }
+        if (env == tvm_keys::TestYateam && Env_ == EBlackboxEnv::TestYateam) {
+            return true;
+        }
+        if (env == tvm_keys::Stress && Env_ == EBlackboxEnv::Stress) {
+            return true;
+        }
+
+        return false;
+    }
+}
diff --git a/library/cpp/tvmauth/src/user_impl.h b/library/cpp/tvmauth/src/user_impl.h
new file mode 100644
index 0000000000..292e94bf5b
--- /dev/null
+++ b/library/cpp/tvmauth/src/user_impl.h
@@ -0,0 +1,72 @@
+#pragma once
+
+#include <library/cpp/tvmauth/src/protos/ticket2.pb.h>
+#include <library/cpp/tvmauth/src/protos/tvm_keys.pb.h>
+#include <library/cpp/tvmauth/src/rw/keys.h>
+
+#include <library/cpp/tvmauth/deprecated/user_context.h>
+
+#include <library/cpp/charset/ci_string.h>
+
+#include <unordered_map>
+
+namespace NTvmAuth {
+    using TUserTicketImplPtr = THolder<TCheckedUserTicket::TImpl>;
+    class TCheckedUserTicket::TImpl {
+    public:
+        explicit operator bool() const;
+
+        TUid GetDefaultUid() const;
+        time_t GetExpirationTime() const;
+        const TScopes& GetScopes() const;
+        bool HasScope(TStringBuf scopeName) const;
+        ETicketStatus GetStatus() const;
+        const TUids& GetUids() const;
+
+        TString DebugInfo() const;
+
+        EBlackboxEnv GetEnv() const;
+
+        void SetStatus(ETicketStatus status);
+
+        /*!
+         * Constructor for creation invalid ticket storing error status in TServiceContext
+         * @param status
+         * @param protobufTicket
+         */
+        TImpl(ETicketStatus status, ticket2::Ticket&& protobufTicket);
+
+        static TUserTicketImplPtr CreateTicketForTests(ETicketStatus status,
+                                                       TUid defaultUid,
+                                                       TScopes scopes,
+                                                       TUids uids,
+                                                       EBlackboxEnv env = EBlackboxEnv::Test);
+
+    private:
+        static const int MaxUserCount = 15;
+
+        ETicketStatus Status_;
+        ticket2::Ticket ProtobufTicket_;
+        mutable TScopes CachedScopes_;
+        mutable TUids CachedUids_;
+        mutable TString CachedDebugInfo_;
+    };
+
+    class TUserContext::TImpl {
+    public:
+        TImpl(EBlackboxEnv env, TStringBuf tvmKeysResponse);
+        void ResetKeys(TStringBuf tvmKeysResponse);
+
+        TUserTicketImplPtr Check(TStringBuf ticketBody) const;
+        const NRw::TPublicKeys& GetKeys() const;
+
+        bool IsAllowed(tvm_keys::BbEnvType env) const;
+
+    private:
+        ETicketStatus CheckProtobufUserTicket(const ticket2::Ticket& ticket) const;
+
+        NRw::TPublicKeys Keys_;
+        EBlackboxEnv Env_;
+        ::google::protobuf::LogSilencer LogSilencer_;
+    };
+}
diff --git a/library/cpp/tvmauth/src/user_ticket.cpp b/library/cpp/tvmauth/src/user_ticket.cpp
new file mode 100644
index 0000000000..3e4e0c0364
--- /dev/null
+++ b/library/cpp/tvmauth/src/user_ticket.cpp
@@ -0,0 +1,56 @@
+#include "user_impl.h"
+
+#include <library/cpp/tvmauth/checked_user_ticket.h>
+
+namespace NTvmAuth {
+    static const char* EX_MSG = "Ticket already moved out";
+
+    TCheckedUserTicket::TCheckedUserTicket(THolder<TCheckedUserTicket::TImpl> impl)
+        : Impl_(std::move(impl))
+    {
+    }
+
+    TCheckedUserTicket::TCheckedUserTicket(TCheckedUserTicket&& o) = default;
+    TCheckedUserTicket::~TCheckedUserTicket() = default;
+    TCheckedUserTicket& TCheckedUserTicket::operator=(TCheckedUserTicket&& o) = default;
+
+    TCheckedUserTicket::operator bool() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->operator bool();
+    }
+
+    const TUids& TCheckedUserTicket::GetUids() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetUids();
+    }
+
+    TUid TCheckedUserTicket::GetDefaultUid() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetDefaultUid();
+    }
+
+    const TScopes& TCheckedUserTicket::GetScopes() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetScopes();
+    }
+
+    bool TCheckedUserTicket::HasScope(TStringBuf scopeName) const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->HasScope(scopeName);
+    }
+
+    ETicketStatus TCheckedUserTicket::GetStatus() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetStatus();
+    }
+
+    TString TCheckedUserTicket::DebugInfo() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->DebugInfo();
+    }
+
+    EBlackboxEnv TCheckedUserTicket::GetEnv() const {
+        Y_ENSURE(Impl_, EX_MSG);
+        return Impl_->GetEnv();
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/parser_ut.cpp b/library/cpp/tvmauth/src/ut/parser_ut.cpp
new file mode 100644
index 0000000000..530f45331a
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/parser_ut.cpp
@@ -0,0 +1,143 @@
+#include <library/cpp/tvmauth/src/parser.h>
+#include <library/cpp/tvmauth/src/utils.h>
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(ParserTestSuite) {
+    using namespace NTvmAuth;
+
+    Y_UNIT_TEST(Keys) {
+        UNIT_ASSERT_EXCEPTION(TParserTvmKeys::ParseStrV1("2:asds"), TMalformedTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TParserTvmKeys::ParseStrV1("3:asds"), TMalformedTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TParserTvmKeys::ParseStrV1("1:+a/sds"), TMalformedTvmKeysException);
+
+        UNIT_ASSERT_VALUES_EQUAL("sdsd", NUtils::Bin2base64url(TParserTvmKeys::ParseStrV1("1:sdsd")));
+    }
+
+    Y_UNIT_TEST(TicketsStrV3) {
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Ok,
+                                                   NUtils::Base64url2bin("CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg"),
+                                                   NUtils::Base64url2bin("ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA"),
+                                                   "3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:"}),
+                          TParserTickets::ParseStrV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::UnsupportedVersion,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("2:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::InvalidTicketType,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::UserFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv::ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA:asd",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv:CgY+-*/IDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERme/*-+H_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("",
+                                                     TParserTickets::ServiceFlag()));
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Malformed,
+                                                   {},
+                                                   {},
+                                                   {}}),
+                          TParserTickets::ParseStrV3("'",
+                                                     TParserTickets::ServiceFlag()));
+
+        // Invalid proto
+        UNIT_ASSERT_EQUAL(TParserTickets::TStrRes({ETicketStatus::Ok,
+                                                   NUtils::Base64url2bin("YIDRCUkQYBgcIgdiYjpzZXNzIghiYjpzZXNzMg"),
+                                                   NUtils::Base64url2bin("ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA"),
+                                                   "3:serv:YIDRCUkQYBgcIgdiYjpzZXNzIghiYjpzZXNzMg:"}),
+                          TParserTickets::ParseStrV3("3:serv:YIDRCUkQYBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                     TParserTickets::ServiceFlag()));
+    }
+
+    Y_UNIT_TEST(TicketsV3) {
+        NRw::TPublicKeys pub;
+
+        UNIT_ASSERT_EQUAL(ETicketStatus::Malformed,
+                          TParserTickets::ParseV3("3:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERme/*-+H_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+
+        // Invalid proto
+        UNIT_ASSERT_EQUAL(ETicketStatus::Malformed,
+                          TParserTickets::ParseV3("3:serv:YIDRCUkQYBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+
+        // Expire time == 100500
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired,
+                          TParserTickets::ParseV3("3:serv:CBAQlJEGIhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMg:HEzPbsjULegBvgX3nqwFX0GfVhESmN1kEWyeT7U03KAR-sQnNYgm6IuN-b9-lQYQKAJSW6p8ffyucC1yDrWSWRxXVzHJUxAVW4hnbiFDtXrurnEdpMK3izKbmTY25PJ4vH3_TkRXk-_oSAE8RvIFKXlh-aw1tezbXBUpJKvyJ0w",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+
+        UNIT_ASSERT_EQUAL(ETicketStatus::MissingKey,
+                          TParserTickets::ParseV3("3:serv:CBAQ__________9_IhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMg:OKjKEbygehEZWH0XEeLzvf0q0aS0VvSk_CKSXGdpqxPbE4RzU70jeM-X9rXVpbYjt76VgBLlBpumJdyiclulfGPDPiL8nwJuu8AnWIR_o-QqyXbsloo2_syE6w2aYw2Yw_5_qjnipYdxGUWegHAGCj3yeMde6O2BmNZ0OCfg6qU",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+
+        pub.emplace(16, NRw::TRwPublicKey(NUtils::Base64url2bin("MIGEAoGBALhrihbf3EpjDQS2sCQHazoFgN0nBbE9eesnnFTfzQELXb2gnJU9enmV_aDqaHKjgtLIPpCgn40lHrn5k6mvH5OdedyI6cCzE-N-GFp3nAq0NDJyMe0fhtIRD__CbT0ulcvkeow65ubXWfw6dBC2gR_34rdMe_L_TGRLMWjDULbN")));
+        UNIT_ASSERT_EQUAL(ETicketStatus::SignBroken,
+                          TParserTickets::ParseV3("3:serv:CBAQ__________9_IhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMa:OKjKEbygehEZWH0XEeLzvf0q0aS0VvSk_CKSXGdpqxPbE4RzU70jeM-X9rXVpbYjt76VgBLlBpumJdyiclulfGPDPiL8nwJuu8AnWIR_o-QqyXbsloo2_syE6w2aYw2Yw_5_qjnipYdxGUWegHAGCj3yeMde6O2BmNZ0OCfg6qU",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+        UNIT_ASSERT_EQUAL(ETicketStatus::SignBroken,
+                          TParserTickets::ParseV3("3:serv:CBAQ__________9_IhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMg:OKjKEbygehEZWH0XEeLzvf0q0aS0VvSk_CKSXGdpqxPbE4RzU70jeM-X9rXVpbYjt76VgBLlBpumJdyiclulfGPDPiL8nwJuu8AnWIR_o-QqyXbsloo2_syE6w2aYw2Yw_5_qjnipYdxGUWegHAGCj3yeMde6O2BmNZ0OCfg6qa",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+        UNIT_ASSERT_EQUAL(ETicketStatus::SignBroken,
+                          TParserTickets::ParseV3("3:serv:CBAQ__________9_IhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMg:EbygehEZWH0XEeLzvf0q0aS0VvSk_CKSXGdpqxPbE4RzU70jeM-X9rXVpbYjt76VgBLlBpumJdyiclulfGPDPiL8nwJuu8AnWIR_o-QqyXbsloo2_syE6w2aYw2Yw_5_qjnipYdxGUWegHAGCj3yeMde6O2BmNZ0OCfg6qU",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok,
+                          TParserTickets::ParseV3("3:serv:CBAQ__________9_IhcIDBAcGgdiYjpzZXNzGghiYjpzZXNzMg:OKjKEbygehEZWH0XEeLzvf0q0aS0VvSk_CKSXGdpqxPbE4RzU70jeM-X9rXVpbYjt76VgBLlBpumJdyiclulfGPDPiL8nwJuu8AnWIR_o-QqyXbsloo2_syE6w2aYw2Yw_5_qjnipYdxGUWegHAGCj3yeMde6O2BmNZ0OCfg6qU",
+                                                  pub,
+                                                  TParserTickets::ServiceFlag())
+                              .Status);
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/public_ut.cpp b/library/cpp/tvmauth/src/ut/public_ut.cpp
new file mode 100644
index 0000000000..74a483d57b
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/public_ut.cpp
@@ -0,0 +1,290 @@
+// DO_NOT_STYLE
+#include <library/cpp/tvmauth/src/service_impl.h>
+#include <library/cpp/tvmauth/src/user_impl.h>
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/ticket_status.h>
+#include <library/cpp/tvmauth/unittest.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+using namespace NTvmAuth;
+
+Y_UNIT_TEST_SUITE(CommonPublicInterfaceTestSuite){
+    Y_UNIT_TEST(StatusTest){
+        UNIT_ASSERT_VALUES_EQUAL("OK",
+                                  StatusToString(ETicketStatus::Ok));
+        UNIT_ASSERT_VALUES_EQUAL("Expired ticket",
+                                  StatusToString(ETicketStatus::Expired));
+        UNIT_ASSERT_VALUES_EQUAL("Invalid BlackBox environment",
+                                  StatusToString(ETicketStatus::InvalidBlackboxEnv));
+        UNIT_ASSERT_VALUES_EQUAL("Invalid ticket destination",
+                                  StatusToString(ETicketStatus::InvalidDst));
+        UNIT_ASSERT_VALUES_EQUAL("Invalid ticket type",
+                                  StatusToString(ETicketStatus::InvalidTicketType));
+        UNIT_ASSERT_VALUES_EQUAL("Malformed ticket",
+                                  StatusToString(ETicketStatus::Malformed));
+        UNIT_ASSERT_VALUES_EQUAL("Invalid ticket signature",
+                                  StatusToString(ETicketStatus::SignBroken));
+        UNIT_ASSERT_VALUES_EQUAL("Context does not have required key to check ticket: public keys are too old",
+                                  StatusToString(ETicketStatus::MissingKey));
+        UNIT_ASSERT_VALUES_EQUAL("Unsupported ticket version",
+                                  StatusToString(ETicketStatus::UnsupportedVersion));
+    }
+}
+
+Y_UNIT_TEST_SUITE(PublicInterfaceServiceTestSuite) {
+    static const TString EMPTY_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAE";
+    static const TString EXPIRED_SERVICE_TICKET = "3:serv:CBAQACIZCOUBEBwaCGJiOnNlc3MxGghiYjpzZXNzMg:IwfMNJYEqStY_SixwqJnyHOMCPR7-3HHk4uylB2oVRkthtezq-OOA7QizDvx7VABLs_iTlXuD1r5IjufNei_EiV145eaa3HIg4xCdJXCojMexf2UYJz8mF2b0YzFAy6_KWagU7xo13CyKAqzJuQf5MJcSUf0ecY9hVh36cJ51aw";
+    static const TString MALFORMED_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAEEpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQYSlQEKkgEIEBAAGocBMIGEAoGBALhrihbf3EpjDQS2sCQHazoFgN0nBbE9eesnnFTfzQELXb2gnJU9enmV_aDqaHKjgtLIPpCgn40lHrn5k6mvH5OdedyI6cCzE-N-GFp3nAq0NDJyMe0fhtIRD__CbT0ulcvkeow65ubXWfw6dBC2gR_34rdMe_L_TGRLMWjDULbNIJ";
+    static const TString MALFORMED_TVM_SECRET = "adcvxcv./-+";
+    static const TTvmId NOT_OUR_ID = 27;
+    static const TTvmId OUR_ID = 28;
+    static const TString SECRET = "GRMJrKnj4fOVnvOqe-WyD1";
+    static const TString SERVICE_TICKET_PROTOBUF = "CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My";
+    static const TTvmId SRC_ID = 229;
+    static const TString UNSUPPORTED_VERSION_SERVICE_TICKET = "2:serv:CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My:WUPx1cTf05fjD1exB35T5j2DCHWH1YaLJon_a4rN-D7JfXHK1Ai4wM4uSfboHD9xmGQH7extqtlEk1tCTCGm5qbRVloJwWzCZBXo3zKX6i1oBYP_89WcjCNPVe1e8jwGdLsnu6PpxL5cn0xCksiStILH5UmDR6xfkJdnmMG94o8";
+    static const TString VALID_SERVICE_TICKET_1 = "3:serv:CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My:WUPx1cTf05fjD1exB35T5j2DCHWH1YaLJon_a4rN-D7JfXHK1Ai4wM4uSfboHD9xmGQH7extqtlEk1tCTCGm5qbRVloJwWzCZBXo3zKX6i1oBYP_89WcjCNPVe1e8jwGdLsnu6PpxL5cn0xCksiStILH5UmDR6xfkJdnmMG94o8";
+    static const TString VALID_SERVICE_TICKET_2 = "3:serv:CBAQ__________9_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:JYmABAVLM6y7_T4n1pRcwBfwDfzMV4JJ3cpbEG617zdGgKRZwL7MalsYn5bq1F2ibujMrsF9nzZf8l4s_e-Ivjkz_xu4KMzSp-pUh9V7XIF_smj0WHYpv6gOvWNuK8uIvlZTTKwtQX0qZOL9m-MEeZiHoQPKZGCfJ_qxMUp-J8I";
+    static const TString VALID_SERVICE_TICKET_3 = "3:serv:CBAQ__________9_IgUI5QEQHA:Sd6tmA1CNy2Nf7XevC3x7zr2DrGNRmcl-TxUsDtDW2xI3YXyCxBltWeg0-KtDlqyYuPOP5Jd_-XXNA12KlOPnNzrz3jm-5z8uQl6CjCcrVHUHJ75pGC8r9UOlS8cOgeXQB5dYP-fOWyo5CNadlozx1S2meCIxncbQRV1kCBi4KU";
+
+    Y_UNIT_TEST(BlackboxTvmIdTest) {
+        UNIT_ASSERT_VALUES_EQUAL("222", NBlackboxTvmId::Prod);
+        UNIT_ASSERT_VALUES_EQUAL("224", NBlackboxTvmId::Test);
+        UNIT_ASSERT_VALUES_EQUAL("223", NBlackboxTvmId::ProdYateam);
+        UNIT_ASSERT_VALUES_EQUAL("225", NBlackboxTvmId::TestYateam);
+        UNIT_ASSERT_VALUES_EQUAL("226", NBlackboxTvmId::Stress);
+        UNIT_ASSERT_VALUES_EQUAL("239", NBlackboxTvmId::Mimino);
+    }
+
+    Y_UNIT_TEST(Case1Test) {
+        TServiceContext context1(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        TServiceContext context2 = std::move(context1);
+        TServiceContext context3(std::move(context2));
+
+        TCheckedServiceTicket checkedTicket1 = context3.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket1.GetStatus());
+        TCheckedServiceTicket checkedTicket2 = std::move(checkedTicket1);
+        TCheckedServiceTicket checkedTicket3(std::move(checkedTicket2));
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket3.GetStatus());
+    }
+
+    Y_UNIT_TEST(ContextExceptionsTest) {
+        UNIT_ASSERT_EXCEPTION(TServiceContext(SECRET, OUR_ID, MALFORMED_TVM_KEYS), TMalformedTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TServiceContext(SECRET, OUR_ID, EMPTY_TVM_KEYS), TEmptyTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TServiceContext(MALFORMED_TVM_SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS), TMalformedTvmSecretException);
+    }
+
+    Y_UNIT_TEST(ContextSignTest) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_VALUES_EQUAL(
+            "NsPTYak4Cfk-4vgau5lab3W4GPiTtb2etuj3y4MDPrk",
+            context.SignCgiParamsForTvm(IntToString<10>(std::numeric_limits<time_t>::max()), "13,28", ""));
+    }
+
+    Y_UNIT_TEST(ContextSignExceptionTest) {
+        TServiceContext context = TServiceContext::CheckingFactory(OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EXCEPTION(
+            context.SignCgiParamsForTvm(IntToString<10>(std::numeric_limits<time_t>::max()), "13,28", ""),
+            TMalformedTvmSecretException
+        );
+
+        context = TServiceContext::SigningFactory(SECRET);
+        UNIT_ASSERT_NO_EXCEPTION(
+            context.SignCgiParamsForTvm(IntToString<10>(std::numeric_limits<time_t>::max()), "13,28", "")
+        );
+    }
+
+    Y_UNIT_TEST(ContextCheckExceptionTest) {
+        TServiceContext context = TServiceContext::CheckingFactory(OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_NO_EXCEPTION(
+            context.Check("ABCDE")
+        );
+
+        context = TServiceContext::SigningFactory(SECRET);
+        UNIT_ASSERT_EXCEPTION(
+            context.Check("ABCDE"),
+            TEmptyTvmKeysException
+        );
+    }
+
+
+    Y_UNIT_TEST(ContextTest) {
+        TServiceContext context1(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        TServiceContext context2 = TServiceContext::CheckingFactory(OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+    }
+
+    Y_UNIT_TEST(Ticket1Test) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_EQUAL(SRC_ID, checkedTicket.GetSrc());
+        UNIT_ASSERT_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;scope=bb:sess1;scope=bb:sess2;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket2Test) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_2);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;scope=bb:sess1;scope=bb:sess10;scope=bb:sess100;scope=bb:sess11;scope=bb:sess12;scope=bb:sess13;scope=bb:sess14;scope=bb:sess15;scope=bb:sess16;scope=bb:sess17;scope=bb:sess18;scope=bb:sess19;scope=bb:sess2;scope=bb:sess20;scope=bb:sess21;scope=bb:sess22;scope=bb:sess23;scope=bb:sess24;scope=bb:sess25;scope=bb:sess26;scope=bb:sess27;scope=bb:sess28;scope=bb:sess29;scope=bb:sess3;scope=bb:sess30;scope=bb:sess31;scope=bb:sess32;scope=bb:sess33;scope=bb:sess34;scope=bb:sess35;scope=bb:sess36;scope=bb:sess37;scope=bb:sess38;scope=bb:sess39;scope=bb:sess4;scope=bb:sess40;scope=bb:sess41;scope=bb:sess42;scope=bb:sess43;scope=bb:sess44;scope=bb:sess45;scope=bb:sess46;scope=bb:sess47;scope=bb:sess48;scope=bb:sess49;scope=bb:sess5;scope=bb:sess50;scope=bb:sess51;scope=bb:sess52;scope=bb:sess53;scope=bb:sess54;scope=bb:sess55;scope=bb:sess56;scope=bb:sess57;scope=bb:sess58;scope=bb:sess59;scope=bb:sess6;scope=bb:sess60;scope=bb:sess61;scope=bb:sess62;scope=bb:sess63;scope=bb:sess64;scope=bb:sess65;scope=bb:sess66;scope=bb:sess67;scope=bb:sess68;scope=bb:sess69;scope=bb:sess7;scope=bb:sess70;scope=bb:sess71;scope=bb:sess72;scope=bb:sess73;scope=bb:sess74;scope=bb:sess75;scope=bb:sess76;scope=bb:sess77;scope=bb:sess78;scope=bb:sess79;scope=bb:sess8;scope=bb:sess80;scope=bb:sess81;scope=bb:sess82;scope=bb:sess83;scope=bb:sess84;scope=bb:sess85;scope=bb:sess86;scope=bb:sess87;scope=bb:sess88;scope=bb:sess89;scope=bb:sess9;scope=bb:sess90;scope=bb:sess91;scope=bb:sess92;scope=bb:sess93;scope=bb:sess94;scope=bb:sess95;scope=bb:sess96;scope=bb:sess97;scope=bb:sess98;scope=bb:sess99;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket3Test) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_3);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(TicketCheckingTest) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto ticket = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, ticket.GetStatus());
+        UNIT_ASSERT_EQUAL(SRC_ID, ticket.GetSrc());
+    }
+
+    Y_UNIT_TEST(TicketErrorsTest) {
+        TServiceContext context(SECRET, NOT_OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket1 = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::InvalidDst, checkedTicket1.GetStatus());
+
+        auto checkedTicket2 = context.Check(UNSUPPORTED_VERSION_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::UnsupportedVersion, checkedTicket2.GetStatus());
+
+        auto checkedTicket3 = context.Check(EXPIRED_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket3.GetStatus());
+    }
+
+    Y_UNIT_TEST(TicketExceptionsTest) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(EXPIRED_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket.GetStatus());
+
+        UNIT_ASSERT(!bool(checkedTicket));
+        UNIT_ASSERT_EXCEPTION(checkedTicket.GetSrc(), TNotAllowedException);
+        UNIT_ASSERT_NO_EXCEPTION(bool(checkedTicket));
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket.DebugInfo());
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket.GetStatus());
+    }
+
+    Y_UNIT_TEST(RemoveSignatureTest) {
+        UNIT_ASSERT_VALUES_EQUAL("1:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                  NUtils::RemoveTicketSignature("1:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("2:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                  NUtils::RemoveTicketSignature("2:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("4:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                  NUtils::RemoveTicketSignature("4:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3.serv.ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds",
+                                  NUtils::RemoveTicketSignature("3.serv.ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:",
+                                  NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:",
+                                  NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:",
+                                  NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("asdxcbvfgdsgfasdfxczvdsgfxcdvbcbvf",
+                                  NUtils::RemoveTicketSignature("asdxcbvfgdsgfasdfxczvdsgfxcdvbcbvf"));
+    }
+
+    Y_UNIT_TEST(ResetKeysTest) {
+        TServiceContext context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        TCheckedServiceTicket checkedTicket = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+    }
+}
+
+Y_UNIT_TEST_SUITE(PublicInterfaceUserTestSuite) {
+    static const TString EMPTY_TVM_KEYS = "1:EpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQY";
+    static const TString EXPIRED_USER_TICKET = "3:user:CA0QABokCgMIyAMKAgh7EMgDGghiYjpzZXNzMRoIYmI6c2VzczIgEigB:D0CmYVwWg91LDYejjeQ2UP8AeiA_mr1q1CUD_lfJ9zQSEYEOYGDTafg4Um2rwOOvQnsD1JHM4zHyMUJ6Jtp9GAm5pmhbXBBZqaCcJpyxLTEC8a81MhJFCCJRvu_G1FiAgRgB25gI3HIbkvHFUEqAIC_nANy7NFQnbKk2S-EQPGY";
+    static const TString MALFORMED_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAEEpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQYSlQEKkgEIEBAAGocBMIGEAoGBALhrihbf3EpjDQS2sCQHazoFgN0nBbE9eesnnFTfzQELXb2gnJU9enmV_aDqaHKjgtLIPpCgn40lHrn5k6mvH5OdedyI6cCzE-N-GFp3nAq0NDJyMe0fhtIRD__CbT0ulcvkeow65ubXWfw6dBC2gR_34rdMe_L_TGRLMWjDULbNIJ";
+    static const TString UNSUPPORTED_VERSION_USER_TICKET = "2:user:CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE:KJFv5EcXn9krYk19LCvlFrhMW-R4q8mKfXJXCd-RBVBgUQzCOR1Dx2FiOyU-BxUoIsaU0PiwTjbVY5I2onJDilge70Cl5zEPI9pfab2qwklACq_ZBUvD1tzrfNUr88otBGAziHASJWgyVDkhyQ3p7YbN38qpb0vGQrYNxlk4e2I";
+    static const TString USER_TICKET_PROTOBUF = "CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE";
+    static const TString VALID_USER_TICKET_1 = "3:user:CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE:KJFv5EcXn9krYk19LCvlFrhMW-R4q8mKfXJXCd-RBVBgUQzCOR1Dx2FiOyU-BxUoIsaU0PiwTjbVY5I2onJDilge70Cl5zEPI9pfab2qwklACq_ZBUvD1tzrfNUr88otBGAziHASJWgyVDkhyQ3p7YbN38qpb0vGQrYNxlk4e2I";
+    static const TString VALID_USER_TICKET_2 = "3:user:CA0Q__________9_GhAKAwjIAwoCCHsQyAMgEigB:KRibGYTJUA2ns0Fn7VYqeMZ1-GdscB1o9pRzELyr7QJrJsfsE8Y_HoVvB8Npr-oalv6AXOpagSc8HpZjAQz8zKMAVE_tI0tL-9DEsHirpawEbpy7OWV7-k18o1m-RaDaKeTlIB45KHbBul1-9aeKkortBfbbXtz_Qy9r_mfFPiQ";
+    static const TString VALID_USER_TICKET_3 = "3:user:CA0Q__________9_Go8bCgIIAAoCCAEKAggCCgIIAwoCCAQKAggFCgIIBgoCCAcKAggICgIICQoCCAoKAggLCgIIDAoCCA0KAggOCgIIDwoCCBAKAggRCgIIEgoCCBMKAggUCgIIFQoCCBYKAggXCgIIGAoCCBkKAggaCgIIGwoCCBwKAggdCgIIHgoCCB8KAgggCgIIIQoCCCIKAggjCgIIJAoCCCUKAggmCgIIJwoCCCgKAggpCgIIKgoCCCsKAggsCgIILQoCCC4KAggvCgIIMAoCCDEKAggyCgIIMwoCCDQKAgg1CgIINgoCCDcKAgg4CgIIOQoCCDoKAgg7CgIIPAoCCD0KAgg-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_AQoDCMABCgMIwQEKAwjCAQoDCMMBCgMIxAEKAwjFAQoDCMYBCgMIxwEKAwjIAQoDCMkBCgMIygEKAwjLAQoDCMwBCgMIzQEKAwjOAQoDCM8BCgMI0AEKAwjRAQoDCNIBCgMI0wEKAwjUAQoDCNUBCgMI1gEKAwjXAQoDCNgBCgMI2QEKAwjaAQoDCNsBCgMI3AEKAwjdAQoDCN4BCgMI3wEKAwjgAQoDCOEBCgMI4gEKAwjjAQoDCOQBCgMI5QEKAwjmAQoDCOcBCgMI6AEKAwjpAQoDCOoBCgMI6wEKAwjsAQoDCO0BCgMI7gEKAwjvAQoDCPABCgMI8QEKAwjyAQoDCPMBCgMI9AEKAwj1AQoDCPYBCgMI9wEKAwj4AQoDCPkBCgMI-gEKAwj7AQoDCPwBCgMI_QEKAwj-AQoDCP8BCgMIgAIKAwiBAgoDCIICCgMIgwIKAwiEAgoDCIUCCgMIhgIKAwiHAgoDCIgCCgMIiQIKAwiKAgoDCIsCCgMIjAIKAwiNAgoDCI4CCgMIjwIKAwiQAgoDCJECCgMIkgIKAwiTAgoDCJQCCgMIlQIKAwiWAgoDCJcCCgMImAIKAwiZAgoDCJoCCgMImwIKAwicAgoDCJ0CCgMIngIKAwifAgoDCKACCgMIoQIKAwiiAgoDCKMCCgMIpAIKAwilAgoDCKYCCgMIpwIKAwioAgoDCKkCCgMIqgIKAwirAgoDCKwCCgMIrQIKAwiuAgoDCK8CCgMIsAIKAwixAgoDCLICCgMIswIKAwi0AgoDCLUCCgMItgIKAwi3AgoDCLgCCgMIuQIKAwi6AgoDCLsCCgMIvAIKAwi9AgoDCL4CCgMIvwIKAwjAAgoDCMECCgMIwgIKAwjDAgoDCMQCCgMIxQIKAwjGAgoDCMcCCgMIyAIKAwjJAgoDCMoCCgMIywIKAwjMAgoDCM0CCgMIzgIKAwjPAgoDCNACCgMI0QIKAwjSAgoDCNMCCgMI1AIKAwjVAgoDCNYCCgMI1wIKAwjYAgoDCNkCCgMI2gIKAwjbAgoDCNwCCgMI3QIKAwjeAgoDCN8CCgMI4AIKAwjhAgoDCOICCgMI4wIKAwjkAgoDCOUCCgMI5gIKAwjnAgoDCOgCCgMI6QIKAwjqAgoDCOsCCgMI7AIKAwjtAgoDCO4CCgMI7wIKAwjwAgoDCPECCgMI8gIKAwjzAgoDCPQCCgMI9QIKAwj2AgoDCPcCCgMI-AIKAwj5AgoDCPoCCgMI-wIKAwj8AgoDCP0CCgMI_gIKAwj_AgoDCIADCgMIgQMKAwiCAwoDCIMDCgMIhAMKAwiFAwoDCIYDCgMIhwMKAwiIAwoDCIkDCgMIigMKAwiLAwoDCIwDCgMIjQMKAwiOAwoDCI8DCgMIkAMKAwiRAwoDCJIDCgMIkwMKAwiUAwoDCJUDCgMIlgMKAwiXAwoDCJgDCgMImQMKAwiaAwoDCJsDCgMInAMKAwidAwoDCJ4DCgMInwMKAwigAwoDCKEDCgMIogMKAwijAwoDCKQDCgMIpQMKAwimAwoDCKcDCgMIqAMKAwipAwoDCKoDCgMIqwMKAwisAwoDCK0DCgMIrgMKAwivAwoDCLADCgMIsQMKAwiyAwoDCLMDCgMItAMKAwi1AwoDCLYDCgMItwMKAwi4AwoDCLkDCgMIugMKAwi7AwoDCLwDCgMIvQMKAwi-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:CX8PIOrxJnQqFXl7wAsiHJ_1VGjoI-asNlCXb8SE8jtI2vdh9x6CqbAurSgIlAAEgotVP-nuUR38x_a9YJuXzmG5AvJ458apWQtODHIDIX6ZaIwMxjS02R7S5LNqXa0gAuU_R6bCWpZdWe2uLMkdpu5KHbDgW08g-uaP_nceDOk";
+
+    Y_UNIT_TEST(Case1Test) {
+        TUserContext context1(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+
+        TCheckedUserTicket checkedTicket1 = context1.Check("2:serv:CgYIDRCUkQYQDBgcIgdiYjpzZXNzIghiYjpzZXNzMg:ERmeH_yzC7K_QsoHTyw7llCsyExEz3CoEopPIuivA0ZAtTaFq_Pa0l9Fhhx_NX9WpOp2CPyY5cFc4PXhcO83jCB7-EGvHNxGN-j2NQalERzPiKqkDCO0Q5etLzSzrfTlvMz7sXDvELNBHyA0PkAQnbz4supY0l-0Q6JBYSEF3zOVMjjE-HeQIFL3ats3_PakaUMWRvgQQ88pVdYZqAtbDw9PlTla7ommygVZQjcfNFXV1pJKRgOCLs-YyCjOJHLKL04zYj0X6KsOCTUeqhj7ml96wLZ-g1X9tyOR2WAr2Ctq7wIEHwqhxOLgOSKqm05xH6Vi3E_hekf50oe2jPfKEA");
+        UNIT_ASSERT_EQUAL(ETicketStatus::UnsupportedVersion, checkedTicket1.GetStatus());
+        UNIT_ASSERT(!checkedTicket1);
+
+        TUserContext context2 = std::move(context1);
+        TUserContext context3(std::move(context2));
+        TCheckedUserTicket checkedTicket2 = context3.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket2.GetStatus());
+        TCheckedUserTicket checkedTicket3 = std::move(checkedTicket2);
+        TCheckedUserTicket checkedTicket4(std::move(checkedTicket3));
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket4.GetStatus());
+    }
+
+    Y_UNIT_TEST(ContextTest) {
+        TUserContext context(EBlackboxEnv::Prod, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+    }
+
+    Y_UNIT_TEST(ContextExceptionsTest) {
+        UNIT_ASSERT_EXCEPTION(TUserContext(EBlackboxEnv::Prod, EMPTY_TVM_KEYS), TEmptyTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TUserContext(EBlackboxEnv::Prod, MALFORMED_TVM_KEYS), TMalformedTvmKeysException);
+    }
+
+    Y_UNIT_TEST(Ticket1Test) {
+        TUserContext context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_EQUAL(TUids({456, 123}), checkedTicket.GetUids());
+        UNIT_ASSERT_EQUAL(456, checkedTicket.GetDefaultUid());
+        UNIT_ASSERT_EQUAL(TScopes({"bb:sess1", "bb:sess2"}), checkedTicket.GetScopes());
+        UNIT_ASSERT(checkedTicket.HasScope("bb:sess1"));
+        UNIT_ASSERT(checkedTicket.HasScope("bb:sess2"));
+        UNIT_ASSERT(!checkedTicket.HasScope("bb:sess3"));
+        UNIT_ASSERT_EQUAL("ticket_type=user;expiration_time=9223372036854775807;scope=bb:sess1;scope=bb:sess2;default_uid=456;uid=456;uid=123;env=Test;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket2Test) {
+        TUserContext context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_2);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=user;expiration_time=9223372036854775807;default_uid=456;uid=456;uid=123;env=Test;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket3Test) {
+        TUserContext context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_3);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=user;expiration_time=9223372036854775807;scope=bb:sess1;scope=bb:sess10;scope=bb:sess100;scope=bb:sess11;scope=bb:sess12;scope=bb:sess13;scope=bb:sess14;scope=bb:sess15;scope=bb:sess16;scope=bb:sess17;scope=bb:sess18;scope=bb:sess19;scope=bb:sess2;scope=bb:sess20;scope=bb:sess21;scope=bb:sess22;scope=bb:sess23;scope=bb:sess24;scope=bb:sess25;scope=bb:sess26;scope=bb:sess27;scope=bb:sess28;scope=bb:sess29;scope=bb:sess3;scope=bb:sess30;scope=bb:sess31;scope=bb:sess32;scope=bb:sess33;scope=bb:sess34;scope=bb:sess35;scope=bb:sess36;scope=bb:sess37;scope=bb:sess38;scope=bb:sess39;scope=bb:sess4;scope=bb:sess40;scope=bb:sess41;scope=bb:sess42;scope=bb:sess43;scope=bb:sess44;scope=bb:sess45;scope=bb:sess46;scope=bb:sess47;scope=bb:sess48;scope=bb:sess49;scope=bb:sess5;scope=bb:sess50;scope=bb:sess51;scope=bb:sess52;scope=bb:sess53;scope=bb:sess54;scope=bb:sess55;scope=bb:sess56;scope=bb:sess57;scope=bb:sess58;scope=bb:sess59;scope=bb:sess6;scope=bb:sess60;scope=bb:sess61;scope=bb:sess62;scope=bb:sess63;scope=bb:sess64;scope=bb:sess65;scope=bb:sess66;scope=bb:sess67;scope=bb:sess68;scope=bb:sess69;scope=bb:sess7;scope=bb:sess70;scope=bb:sess71;scope=bb:sess72;scope=bb:sess73;scope=bb:sess74;scope=bb:sess75;scope=bb:sess76;scope=bb:sess77;scope=bb:sess78;scope=bb:sess79;scope=bb:sess8;scope=bb:sess80;scope=bb:sess81;scope=bb:sess82;scope=bb:sess83;scope=bb:sess84;scope=bb:sess85;scope=bb:sess86;scope=bb:sess87;scope=bb:sess88;scope=bb:sess89;scope=bb:sess9;scope=bb:sess90;scope=bb:sess91;scope=bb:sess92;scope=bb:sess93;scope=bb:sess94;scope=bb:sess95;scope=bb:sess96;scope=bb:sess97;scope=bb:sess98;scope=bb:sess99;default_uid=456;uid=0;uid=1;uid=2;uid=3;uid=4;uid=5;uid=6;uid=7;uid=8;uid=9;uid=10;uid=11;uid=12;uid=13;uid=14;uid=15;uid=16;uid=17;uid=18;uid=19;uid=20;uid=21;uid=22;uid=23;uid=24;uid=25;uid=26;uid=27;uid=28;uid=29;uid=30;uid=31;uid=32;uid=33;uid=34;uid=35;uid=36;uid=37;uid=38;uid=39;uid=40;uid=41;uid=42;uid=43;uid=44;uid=45;uid=46;uid=47;uid=48;uid=49;uid=50;uid=51;uid=52;uid=53;uid=54;uid=55;uid=56;uid=57;uid=58;uid=59;uid=60;uid=61;uid=62;uid=63;uid=64;uid=65;uid=66;uid=67;uid=68;uid=69;uid=70;uid=71;uid=72;uid=73;uid=74;uid=75;uid=76;uid=77;uid=78;uid=79;uid=80;uid=81;uid=82;uid=83;uid=84;uid=85;uid=86;uid=87;uid=88;uid=89;uid=90;uid=91;uid=92;uid=93;uid=94;uid=95;uid=96;uid=97;uid=98;uid=99;uid=100;uid=101;uid=102;uid=103;uid=104;uid=105;uid=106;uid=107;uid=108;uid=109;uid=110;uid=111;uid=112;uid=113;uid=114;uid=115;uid=116;uid=117;uid=118;uid=119;uid=120;uid=121;uid=122;uid=123;uid=124;uid=125;uid=126;uid=127;uid=128;uid=129;uid=130;uid=131;uid=132;uid=133;uid=134;uid=135;uid=136;uid=137;uid=138;uid=139;uid=140;uid=141;uid=142;uid=143;uid=144;uid=145;uid=146;uid=147;uid=148;uid=149;uid=150;uid=151;uid=152;uid=153;uid=154;uid=155;uid=156;uid=157;uid=158;uid=159;uid=160;uid=161;uid=162;uid=163;uid=164;uid=165;uid=166;uid=167;uid=168;uid=169;uid=170;uid=171;uid=172;uid=173;uid=174;uid=175;uid=176;uid=177;uid=178;uid=179;uid=180;uid=181;uid=182;uid=183;uid=184;uid=185;uid=186;uid=187;uid=188;uid=189;uid=190;uid=191;uid=192;uid=193;uid=194;uid=195;uid=196;uid=197;uid=198;uid=199;uid=200;uid=201;uid=202;uid=203;uid=204;uid=205;uid=206;uid=207;uid=208;uid=209;uid=210;uid=211;uid=212;uid=213;uid=214;uid=215;uid=216;uid=217;uid=218;uid=219;uid=220;uid=221;uid=222;uid=223;uid=224;uid=225;uid=226;uid=227;uid=228;uid=229;uid=230;uid=231;uid=232;uid=233;uid=234;uid=235;uid=236;uid=237;uid=238;uid=239;uid=240;uid=241;uid=242;uid=243;uid=244;uid=245;uid=246;uid=247;uid=248;uid=249;uid=250;uid=251;uid=252;uid=253;uid=254;uid=255;uid=256;uid=257;uid=258;uid=259;uid=260;uid=261;uid=262;uid=263;uid=264;uid=265;uid=266;uid=267;uid=268;uid=269;uid=270;uid=271;uid=272;uid=273;uid=274;uid=275;uid=276;uid=277;uid=278;uid=279;uid=280;uid=281;uid=282;uid=283;uid=284;uid=285;uid=286;uid=287;uid=288;uid=289;uid=290;uid=291;uid=292;uid=293;uid=294;uid=295;uid=296;uid=297;uid=298;uid=299;uid=300;uid=301;uid=302;uid=303;uid=304;uid=305;uid=306;uid=307;uid=308;uid=309;uid=310;uid=311;uid=312;uid=313;uid=314;uid=315;uid=316;uid=317;uid=318;uid=319;uid=320;uid=321;uid=322;uid=323;uid=324;uid=325;uid=326;uid=327;uid=328;uid=329;uid=330;uid=331;uid=332;uid=333;uid=334;uid=335;uid=336;uid=337;uid=338;uid=339;uid=340;uid=341;uid=342;uid=343;uid=344;uid=345;uid=346;uid=347;uid=348;uid=349;uid=350;uid=351;uid=352;uid=353;uid=354;uid=355;uid=356;uid=357;uid=358;uid=359;uid=360;uid=361;uid=362;uid=363;uid=364;uid=365;uid=366;uid=367;uid=368;uid=369;uid=370;uid=371;uid=372;uid=373;uid=374;uid=375;uid=376;uid=377;uid=378;uid=379;uid=380;uid=381;uid=382;uid=383;uid=384;uid=385;uid=386;uid=387;uid=388;uid=389;uid=390;uid=391;uid=392;uid=393;uid=394;uid=395;uid=396;uid=397;uid=398;uid=399;uid=400;uid=401;uid=402;uid=403;uid=404;uid=405;uid=406;uid=407;uid=408;uid=409;uid=410;uid=411;uid=412;uid=413;uid=414;uid=415;uid=416;uid=417;uid=418;uid=419;uid=420;uid=421;uid=422;uid=423;uid=424;uid=425;uid=426;uid=427;uid=428;uid=429;uid=430;uid=431;uid=432;uid=433;uid=434;uid=435;uid=436;uid=437;uid=438;uid=439;uid=440;uid=441;uid=442;uid=443;uid=444;uid=445;uid=446;uid=447;uid=448;uid=449;uid=450;uid=451;uid=452;uid=453;uid=454;uid=455;uid=456;uid=457;uid=458;uid=459;uid=460;uid=461;uid=462;uid=463;uid=464;uid=465;uid=466;uid=467;uid=468;uid=469;uid=470;uid=471;uid=472;uid=473;uid=474;uid=475;uid=476;uid=477;uid=478;uid=479;uid=480;uid=481;uid=482;uid=483;uid=484;uid=485;uid=486;uid=487;uid=488;uid=489;uid=490;uid=491;uid=492;uid=493;uid=494;uid=495;uid=496;uid=497;uid=498;uid=499;env=Test;", checkedTicket.DebugInfo());
+    }
+
+    Y_UNIT_TEST(TicketErrorsTest) {
+        TUserContext contextTest(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket1 = contextTest.Check(UNSUPPORTED_VERSION_USER_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::UnsupportedVersion, checkedTicket1.GetStatus());
+
+        auto checkedTicket2 = contextTest.Check(EXPIRED_USER_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket2.GetStatus());
+
+        TUserContext contextProd(EBlackboxEnv::Prod, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket3 = contextProd.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::InvalidBlackboxEnv, checkedTicket3.GetStatus());
+    }
+
+    Y_UNIT_TEST(TicketExceptionsTest) {
+        TUserContext contextTest(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = contextTest.Check(EXPIRED_USER_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket.GetStatus());
+
+        UNIT_ASSERT_EXCEPTION(checkedTicket.GetDefaultUid(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket.GetUids(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket.GetScopes(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket.HasScope(""), TNotAllowedException);
+        UNIT_ASSERT_NO_EXCEPTION(bool(checkedTicket));
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket.DebugInfo());
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket.GetStatus());
+    }
+
+    Y_UNIT_TEST(ResetKeysTest) {
+        TUserContext context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/service_ut.cpp b/library/cpp/tvmauth/src/ut/service_ut.cpp
new file mode 100644
index 0000000000..5b6b5143bd
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/service_ut.cpp
@@ -0,0 +1,156 @@
+#include <library/cpp/tvmauth/src/service_impl.h>
+#include <library/cpp/tvmauth/src/utils.h>
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/unittest.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/string/cast.h>
+
+using namespace NTvmAuth;
+
+Y_UNIT_TEST_SUITE(ServiceTestSuite) {
+    Y_UNIT_TEST_DECLARE(TicketProtoTest);
+}
+
+class TTestServiceTicketImpl: public TCheckedServiceTicket::TImpl {
+    using TCheckedServiceTicket::TImpl::TImpl;
+    Y_UNIT_TEST_FRIEND(ServiceTestSuite, TicketProtoTest);
+};
+
+Y_UNIT_TEST_SUITE_IMPLEMENTATION(ServiceTestSuite) {
+    static const TString EMPTY_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAE";
+    static const TString EXPIRED_SERVICE_TICKET = "3:serv:CBAQACIZCOUBEBwaCGJiOnNlc3MxGghiYjpzZXNzMg:IwfMNJYEqStY_SixwqJnyHOMCPR7-3HHk4uylB2oVRkthtezq-OOA7QizDvx7VABLs_iTlXuD1r5IjufNei_EiV145eaa3HIg4xCdJXCojMexf2UYJz8mF2b0YzFAy6_KWagU7xo13CyKAqzJuQf5MJcSUf0ecY9hVh36cJ51aw";
+    static const TString MALFORMED_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAEEpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQYSlQEKkgEIEBAAGocBMIGEAoGBALhrihbf3EpjDQS2sCQHazoFgN0nBbE9eesnnFTfzQELXb2gnJU9enmV_aDqaHKjgtLIPpCgn40lHrn5k6mvH5OdedyI6cCzE-N-GFp3nAq0NDJyMe0fhtIRD__CbT0ulcvkeow65ubXWfw6dBC2gR_34rdMe_L_TGRLMWjDULbNIJ";
+    static const TString MALFORMED_TVM_SECRET = "adcvxcv./-+";
+    static const TTvmId NOT_OUR_ID = 27;
+    static const TTvmId OUR_ID = 28;
+    static const TString SECRET = "GRMJrKnj4fOVnvOqe-WyD1";
+    static const TString SERVICE_TICKET_PROTOBUF = "CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My";
+    static const TTvmId SRC_ID = 229;
+    static const TString UNSUPPORTED_VERSION_SERVICE_TICKET = "2:serv:CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My:WUPx1cTf05fjD1exB35T5j2DCHWH1YaLJon_a4rN-D7JfXHK1Ai4wM4uSfboHD9xmGQH7extqtlEk1tCTCGm5qbRVloJwWzCZBXo3zKX6i1oBYP_89WcjCNPVe1e8jwGdLsnu6PpxL5cn0xCksiStILH5UmDR6xfkJdnmMG94o8";
+    static const TString VALID_SERVICE_TICKET_1 = "3:serv:CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My:WUPx1cTf05fjD1exB35T5j2DCHWH1YaLJon_a4rN-D7JfXHK1Ai4wM4uSfboHD9xmGQH7extqtlEk1tCTCGm5qbRVloJwWzCZBXo3zKX6i1oBYP_89WcjCNPVe1e8jwGdLsnu6PpxL5cn0xCksiStILH5UmDR6xfkJdnmMG94o8";
+    static const TString VALID_SERVICE_TICKET_2 = "3:serv:CBAQ__________9_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:JYmABAVLM6y7_T4n1pRcwBfwDfzMV4JJ3cpbEG617zdGgKRZwL7MalsYn5bq1F2ibujMrsF9nzZf8l4s_e-Ivjkz_xu4KMzSp-pUh9V7XIF_smj0WHYpv6gOvWNuK8uIvlZTTKwtQX0qZOL9m-MEeZiHoQPKZGCfJ_qxMUp-J8I";
+    static const TString VALID_SERVICE_TICKET_3 = "3:serv:CBAQ__________9_IgUI5QEQHA:Sd6tmA1CNy2Nf7XevC3x7zr2DrGNRmcl-TxUsDtDW2xI3YXyCxBltWeg0-KtDlqyYuPOP5Jd_-XXNA12KlOPnNzrz3jm-5z8uQl6CjCcrVHUHJ75pGC8r9UOlS8cOgeXQB5dYP-fOWyo5CNadlozx1S2meCIxncbQRV1kCBi4KU";
+    static const TString VALID_SERVICE_TICKET_ISSUER = "3:serv:CBAQ__________9_IgsI5QEQHCDr1MT4Ag:Gu66XJT_nKnIRJjFy1561wFhIqkJItcSTGftLo7Yvi7i5wIdV-QuKT_-IMPpgjxnnGbt1Dy3Ys2TEoeJAb0TdaCYG1uy3vpoLONmTx9AenN5dx1HHf46cypLK5D3OdiTjxvqI9uGmSIKrSdRxU8gprpu5QiBDPZqVCWhM60FVSY";
+
+    Y_UNIT_TEST(ContextExceptionsTest) {
+        UNIT_ASSERT_EXCEPTION(TServiceContext::TImpl(SECRET, OUR_ID, MALFORMED_TVM_KEYS), TMalformedTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TServiceContext::TImpl(SECRET, OUR_ID, EMPTY_TVM_KEYS), TEmptyTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TServiceContext::TImpl(MALFORMED_TVM_SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS), TMalformedTvmSecretException);
+    }
+
+    Y_UNIT_TEST(ContextSignTest) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_VALUES_EQUAL(
+            "NsPTYak4Cfk-4vgau5lab3W4GPiTtb2etuj3y4MDPrk",
+            context.SignCgiParamsForTvm(IntToString<10>(std::numeric_limits<time_t>::max()), "13,28", ""));
+    }
+
+    Y_UNIT_TEST(Ticket1Test) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_EQUAL(std::numeric_limits<time_t>::max(), checkedTicket->GetExpirationTime());
+        UNIT_ASSERT_EQUAL(SRC_ID, checkedTicket->GetSrc());
+        UNIT_ASSERT_EQUAL(TScopes({"bb:sess1", "bb:sess2"}), checkedTicket->GetScopes());
+        UNIT_ASSERT(checkedTicket->HasScope("bb:sess1"));
+        UNIT_ASSERT(checkedTicket->HasScope("bb:sess2"));
+        UNIT_ASSERT(!checkedTicket->HasScope("bb:sess3"));
+        UNIT_ASSERT_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;scope=bb:sess1;scope=bb:sess2;", checkedTicket->DebugInfo());
+        UNIT_ASSERT(!checkedTicket->GetIssuerUid());
+    }
+
+    Y_UNIT_TEST(Ticket2Test) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_2);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;scope=bb:sess1;scope=bb:sess10;scope=bb:sess100;scope=bb:sess11;scope=bb:sess12;scope=bb:sess13;scope=bb:sess14;scope=bb:sess15;scope=bb:sess16;scope=bb:sess17;scope=bb:sess18;scope=bb:sess19;scope=bb:sess2;scope=bb:sess20;scope=bb:sess21;scope=bb:sess22;scope=bb:sess23;scope=bb:sess24;scope=bb:sess25;scope=bb:sess26;scope=bb:sess27;scope=bb:sess28;scope=bb:sess29;scope=bb:sess3;scope=bb:sess30;scope=bb:sess31;scope=bb:sess32;scope=bb:sess33;scope=bb:sess34;scope=bb:sess35;scope=bb:sess36;scope=bb:sess37;scope=bb:sess38;scope=bb:sess39;scope=bb:sess4;scope=bb:sess40;scope=bb:sess41;scope=bb:sess42;scope=bb:sess43;scope=bb:sess44;scope=bb:sess45;scope=bb:sess46;scope=bb:sess47;scope=bb:sess48;scope=bb:sess49;scope=bb:sess5;scope=bb:sess50;scope=bb:sess51;scope=bb:sess52;scope=bb:sess53;scope=bb:sess54;scope=bb:sess55;scope=bb:sess56;scope=bb:sess57;scope=bb:sess58;scope=bb:sess59;scope=bb:sess6;scope=bb:sess60;scope=bb:sess61;scope=bb:sess62;scope=bb:sess63;scope=bb:sess64;scope=bb:sess65;scope=bb:sess66;scope=bb:sess67;scope=bb:sess68;scope=bb:sess69;scope=bb:sess7;scope=bb:sess70;scope=bb:sess71;scope=bb:sess72;scope=bb:sess73;scope=bb:sess74;scope=bb:sess75;scope=bb:sess76;scope=bb:sess77;scope=bb:sess78;scope=bb:sess79;scope=bb:sess8;scope=bb:sess80;scope=bb:sess81;scope=bb:sess82;scope=bb:sess83;scope=bb:sess84;scope=bb:sess85;scope=bb:sess86;scope=bb:sess87;scope=bb:sess88;scope=bb:sess89;scope=bb:sess9;scope=bb:sess90;scope=bb:sess91;scope=bb:sess92;scope=bb:sess93;scope=bb:sess94;scope=bb:sess95;scope=bb:sess96;scope=bb:sess97;scope=bb:sess98;scope=bb:sess99;", checkedTicket->DebugInfo());
+        UNIT_ASSERT(!checkedTicket->GetIssuerUid());
+    }
+
+    Y_UNIT_TEST(Ticket3Test) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_3);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;", checkedTicket->DebugInfo());
+        UNIT_ASSERT(!checkedTicket->GetIssuerUid());
+    }
+
+    Y_UNIT_TEST(TicketIssuerTest) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_ISSUER);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;expiration_time=9223372036854775807;src=229;dst=28;issuer_uid=789654123;",
+                                 checkedTicket->DebugInfo());
+        UNIT_ASSERT(checkedTicket->GetIssuerUid());
+        UNIT_ASSERT_VALUES_EQUAL(789654123, *checkedTicket->GetIssuerUid());
+    }
+
+    Y_UNIT_TEST(TicketErrorsTest) {
+        TServiceContext::TImpl context(SECRET, NOT_OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket1 = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::InvalidDst, checkedTicket1->GetStatus());
+
+        auto checkedTicket2 = context.Check(UNSUPPORTED_VERSION_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::UnsupportedVersion, checkedTicket2->GetStatus());
+
+        auto checkedTicket3 = context.Check(EXPIRED_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket3->GetStatus());
+    }
+
+    Y_UNIT_TEST(TicketExceptionTest) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+
+        auto checkedTicket = context.Check(EXPIRED_SERVICE_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket->GetStatus());
+
+        UNIT_ASSERT_EXCEPTION(checkedTicket->GetScopes(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket->GetSrc(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket->HasScope(""), TNotAllowedException);
+        UNIT_ASSERT_NO_EXCEPTION(bool(*checkedTicket));
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket->DebugInfo());
+    }
+
+    Y_UNIT_TEST(TicketProtoTest) {
+        ticket2::Ticket protobufTicket;
+        UNIT_ASSERT(protobufTicket.ParseFromString(NUtils::Base64url2bin(SERVICE_TICKET_PROTOBUF)));
+        TTestServiceTicketImpl checkedTicket(ETicketStatus::Ok, std::move(protobufTicket));
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket.GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(std::numeric_limits<time_t>::max(), checkedTicket.GetExpirationTime());
+        UNIT_ASSERT_EQUAL(SRC_ID, checkedTicket.GetSrc());
+    }
+
+    Y_UNIT_TEST(ResetKeysTest) {
+        TServiceContext::TImpl context(SECRET, OUR_ID, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        context.ResetKeys(NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_SERVICE_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+    }
+
+    Y_UNIT_TEST(CreateTicketForTests) {
+        TCheckedServiceTicket t = NTvmAuth::NUnittest::CreateServiceTicket(ETicketStatus::Ok, 42);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, t.GetStatus());
+        UNIT_ASSERT_EQUAL(42, t.GetSrc());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=serv;src=42;dst=100500;", t.DebugInfo());
+    }
+
+    Y_UNIT_TEST(CreateForTests) {
+        auto t = TCheckedServiceTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 456, {});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(456, t->GetSrc());
+        UNIT_ASSERT(!t->GetIssuerUid());
+
+        t = TCheckedServiceTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 456, 100800);
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(456, t->GetSrc());
+        UNIT_ASSERT(t->GetIssuerUid());
+        UNIT_ASSERT_VALUES_EQUAL(*t->GetIssuerUid(), 100800);
+
+        t = TCheckedServiceTicket::TImpl::CreateTicketForTests(ETicketStatus::Expired, 456, {});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Expired, t->GetStatus());
+        UNIT_ASSERT_EXCEPTION_CONTAINS(t->GetSrc(), TNotAllowedException, "Method cannot be used in non-valid ticket");
+        UNIT_ASSERT_EXCEPTION_CONTAINS(t->GetIssuerUid(), TNotAllowedException, "Method cannot be used in non-valid ticket");
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/user_ut.cpp b/library/cpp/tvmauth/src/ut/user_ut.cpp
new file mode 100644
index 0000000000..c040e94974
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/user_ut.cpp
@@ -0,0 +1,216 @@
+#include <library/cpp/tvmauth/src/user_impl.h>
+#include <library/cpp/tvmauth/src/utils.h>
+
+#include <library/cpp/tvmauth/exception.h>
+#include <library/cpp/tvmauth/unittest.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+using namespace NTvmAuth;
+
+Y_UNIT_TEST_SUITE(UserTestSuite) {
+    Y_UNIT_TEST_DECLARE(TicketProtoTest);
+}
+
+class TTestUserTicketImpl: TCheckedUserTicket::TImpl {
+    using TCheckedUserTicket::TImpl::TImpl;
+    Y_UNIT_TEST_FRIEND(UserTestSuite, TicketProtoTest);
+};
+
+Y_UNIT_TEST_SUITE_IMPLEMENTATION(UserTestSuite) {
+    static const TString EMPTY_TVM_KEYS = "1:EpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQY";
+    static const TString EXPIRED_USER_TICKET = "3:user:CA0QABokCgMIyAMKAgh7EMgDGghiYjpzZXNzMRoIYmI6c2VzczIgEigB:D0CmYVwWg91LDYejjeQ2UP8AeiA_mr1q1CUD_lfJ9zQSEYEOYGDTafg4Um2rwOOvQnsD1JHM4zHyMUJ6Jtp9GAm5pmhbXBBZqaCcJpyxLTEC8a81MhJFCCJRvu_G1FiAgRgB25gI3HIbkvHFUEqAIC_nANy7NFQnbKk2S-EQPGY";
+    static const TString MALFORMED_TVM_KEYS = "1:CpgCCpMCCAEQABqIAjCCAQQCggEAcLEXeH67FQESFUn4_7wnX7wN0PUrBoUsm3QQ4W5vC-qz6sXaEjSwnTV8w1o-z6X9KPLlhzMQvuS38NCNfK4uvJ4Zvfp3YsXJ25-rYtbnrYJHNvHohD-kPCCw_yZpMp21JdWigzQGuV7CtrxUhF-NNrsnUaJrE5-OpEWNt4X6nCItKIYeVcSK6XJUbEWbrNCRbvkSc4ak2ymFeMuHYJVjxh4eQbk7_ZPzodP0WvF6eUYrYeb42imVEOR8ofVLQWE5DVnb1z_TqZm4i1XkS7jMwZuBxBRw8DGdYei0lT_sAf7KST2jC0590NySB3vsBgWEVs1OdUUWA6r-Dvx9dsOQtSCVkQYQAAqZAgqUAggCEAAaiQIwggEFAoIBAQDhEBM5-6YsPWfogKtbluJoCX1WV2KdzOaQ0-OlRbBzeCzw-eQKu12c8WakHBbeCMd1I1TU64SDkDorWjXGIa_2xT6N3zzNAE50roTbPCcmeQrps26woTYfYIuqDdoxYKZNr0lvNLLW47vBr7EKqo1S4KSj7aXK_XYeEvUgIgf3nVIcNrio7VTnFmGGVQCepaL1Hi1gN4yIXjVZ06PBPZ-DxSRu6xOGbFrfKMJeMPs7KOyE-26Q3xOXdTIa1X-zYIucTd_bxUCL4BVbwW2AvbbFsaG7ISmVdGu0XUTmhXs1KrEfUVLRJhE4Dx99hAZXm1_HlYMUeJcMQ_oHOhV94ENFIJaRBhACCpYBCpEBCAMQABqGATCBgwKBgF9t2YJGAJkRRFq6fWhi3m1TFW1UOE0f6ZrfYhHAkpqGlKlh0QVfeTNPpeJhi75xXzCe6oReRUm-0DbqDNhTShC7uGUv1INYnRBQWH6E-5Fc5XrbDFSuGQw2EYjNfHy_HefHJXxQKAqPvxBDKMKkHgV58WtM6rC8jRi9sdX_ig2NIJeRBhABCpYBCpEBCAQQABqGATCBgwKBgGB4d6eLGUBv-Q6EPLehC4S-yuE2HB-_rJ7WkeYwyp-xIPolPrd-PQme2utHB4ZgpXHIu_OFksDe_0bPgZniNRSVRbl7W49DgS5Ya3kMfrYB4DnF5Fta5tn1oV6EwxYD4JONpFTenOJALPGTPawxXEfon_peiHOSBuQMu3_Vn-l1IJiRBhADCpcBCpIBCAUQABqHATCBhAKBgQCTJMKIfmfeZpaI7Q9rnsc29gdWawK7TnpVKRHws1iY7EUlYROeVcMdAwEqVM6f8BVCKLGgzQ7Gar_uuxfUGKwqEQzoppDraw4F75J464-7D5f6_oJQuGIBHZxqbMONtLjBCXRUhQW5szBLmTQ_R3qaJb5vf-h0APZfkYhq1cTttSCZkQYQBAqWAQqRAQgLEAAahgEwgYMCgYBvvGVH_M2H8qxxv94yaDYUTWbRnJ1uiIYc59KIQlfFimMPhSS7x2tqUa2-hI55JiII0Xym6GNkwLhyc1xtWChpVuIdSnbvttbrt4weDMLHqTwNOF6qAsVKGKT1Yh8yf-qb-DSmicgvFc74mBQm_6gAY1iQsf33YX8578ClhKBWHSCVkQYQAAqXAQqSAQgMEAAahwEwgYQCgYEAkuzFcd5TJu7lYWYe2hQLFfUWIIj91BvQQLa_Thln4YtGCO8gG1KJqJm-YlmJOWQG0B7H_5RVhxUxV9KpmFnsDVkzUFKOsCBaYGXc12xPVioawUlAwp5qp3QQtZyx_se97YIoLzuLr46UkLcLnkIrp-Jo46QzYi_QHq45WTm8MQ0glpEGEAIKlwEKkgEIDRAAGocBMIGEAoGBAIUzbxOknXf_rNt17_ir8JlWvrtnCWsQd1MAnl5mgArvavDtKeBYHzi5_Ak7DHlLzuA6YE8W175FxLFKpN2hkz-l-M7ltUSd8N1BvJRhK4t6WffWfC_1wPyoAbeSN2Yb1jygtZJQ8wGoXHcJQUXiMit3eFNyylwsJFj1gzAR4JCdIJeRBhABCpYBCpEBCA4QABqGATCBgwKBgFMcbEpl9ukVR6AO_R6sMyiU11I8b8MBSUCEC15iKsrVO8v_m47_TRRjWPYtQ9eZ7o1ocNJHaGUU7qqInFqtFaVnIceP6NmCsXhjs3MLrWPS8IRAy4Zf4FKmGOx3N9O2vemjUygZ9vUiSkULdVrecinRaT8JQ5RG4bUMY04XGIwFIJiRBhADCpYBCpEBCA8QABqGATCBgwKBgGpCkW-NR3li8GlRvqpq2YZGSIgm_PTyDI2Zwfw69grsBmPpVFW48Vw7xoMN35zcrojEpialB_uQzlpLYOvsMl634CRIuj-n1QE3-gaZTTTE8mg-AR4mcxnTKThPnRQpbuOlYAnriwiasWiQEMbGjq_HmWioYYxFo9USlklQn4-9IJmRBhAEEpUBCpIBCAYQABqHATCBhAKBgQCoZkFGm9oLTqjeXZAq6j5S6i7K20V0lNdBBLqfmFBIRuTkYxhs4vUYnWjZrKRAd5bp6_py0csmFmpl_5Yh0b-2pdo_E5PNP7LGRzKyKSiFddyykKKzVOazH8YYldDAfE8Z5HoS9e48an5JsPg0jr-TPu34DnJq3yv2a6dqiKL9zSCakQYSlQEKkgEIEBAAGocBMIGEAoGBALhrihbf3EpjDQS2sCQHazoFgN0nBbE9eesnnFTfzQELXb2gnJU9enmV_aDqaHKjgtLIPpCgn40lHrn5k6mvH5OdedyI6cCzE-N-GFp3nAq0NDJyMe0fhtIRD__CbT0ulcvkeow65ubXWfw6dBC2gR_34rdMe_L_TGRLMWjDULbNIJ";
+    static const TString UNSUPPORTED_VERSION_USER_TICKET = "2:user:CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE:KJFv5EcXn9krYk19LCvlFrhMW-R4q8mKfXJXCd-RBVBgUQzCOR1Dx2FiOyU-BxUoIsaU0PiwTjbVY5I2onJDilge70Cl5zEPI9pfab2qwklACq_ZBUvD1tzrfNUr88otBGAziHASJWgyVDkhyQ3p7YbN38qpb0vGQrYNxlk4e2I";
+    static const TString USER_TICKET_PROTOBUF = "CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE";
+    static const TString VALID_USER_TICKET_1 = "3:user:CA0Q__________9_GiQKAwjIAwoCCHsQyAMaCGJiOnNlc3MxGghiYjpzZXNzMiASKAE:KJFv5EcXn9krYk19LCvlFrhMW-R4q8mKfXJXCd-RBVBgUQzCOR1Dx2FiOyU-BxUoIsaU0PiwTjbVY5I2onJDilge70Cl5zEPI9pfab2qwklACq_ZBUvD1tzrfNUr88otBGAziHASJWgyVDkhyQ3p7YbN38qpb0vGQrYNxlk4e2I";
+    static const TString VALID_USER_TICKET_2 = "3:user:CA0Q__________9_GhAKAwjIAwoCCHsQyAMgEigB:KRibGYTJUA2ns0Fn7VYqeMZ1-GdscB1o9pRzELyr7QJrJsfsE8Y_HoVvB8Npr-oalv6AXOpagSc8HpZjAQz8zKMAVE_tI0tL-9DEsHirpawEbpy7OWV7-k18o1m-RaDaKeTlIB45KHbBul1-9aeKkortBfbbXtz_Qy9r_mfFPiQ";
+    static const TString VALID_USER_TICKET_3 = "3:user:CA0Q__________9_Go8bCgIIAAoCCAEKAggCCgIIAwoCCAQKAggFCgIIBgoCCAcKAggICgIICQoCCAoKAggLCgIIDAoCCA0KAggOCgIIDwoCCBAKAggRCgIIEgoCCBMKAggUCgIIFQoCCBYKAggXCgIIGAoCCBkKAggaCgIIGwoCCBwKAggdCgIIHgoCCB8KAgggCgIIIQoCCCIKAggjCgIIJAoCCCUKAggmCgIIJwoCCCgKAggpCgIIKgoCCCsKAggsCgIILQoCCC4KAggvCgIIMAoCCDEKAggyCgIIMwoCCDQKAgg1CgIINgoCCDcKAgg4CgIIOQoCCDoKAgg7CgIIPAoCCD0KAgg-CgIIPwoCCEAKAghBCgIIQgoCCEMKAghECgIIRQoCCEYKAghHCgIISAoCCEkKAghKCgIISwoCCEwKAghNCgIITgoCCE8KAghQCgIIUQoCCFIKAghTCgIIVAoCCFUKAghWCgIIVwoCCFgKAghZCgIIWgoCCFsKAghcCgIIXQoCCF4KAghfCgIIYAoCCGEKAghiCgIIYwoCCGQKAghlCgIIZgoCCGcKAghoCgIIaQoCCGoKAghrCgIIbAoCCG0KAghuCgIIbwoCCHAKAghxCgIIcgoCCHMKAgh0CgIIdQoCCHYKAgh3CgIIeAoCCHkKAgh6CgIIewoCCHwKAgh9CgIIfgoCCH8KAwiAAQoDCIEBCgMIggEKAwiDAQoDCIQBCgMIhQEKAwiGAQoDCIcBCgMIiAEKAwiJAQoDCIoBCgMIiwEKAwiMAQoDCI0BCgMIjgEKAwiPAQoDCJABCgMIkQEKAwiSAQoDCJMBCgMIlAEKAwiVAQoDCJYBCgMIlwEKAwiYAQoDCJkBCgMImgEKAwibAQoDCJwBCgMInQEKAwieAQoDCJ8BCgMIoAEKAwihAQoDCKIBCgMIowEKAwikAQoDCKUBCgMIpgEKAwinAQoDCKgBCgMIqQEKAwiqAQoDCKsBCgMIrAEKAwitAQoDCK4BCgMIrwEKAwiwAQoDCLEBCgMIsgEKAwizAQoDCLQBCgMItQEKAwi2AQoDCLcBCgMIuAEKAwi5AQoDCLoBCgMIuwEKAwi8AQoDCL0BCgMIvgEKAwi_AQoDCMABCgMIwQEKAwjCAQoDCMMBCgMIxAEKAwjFAQoDCMYBCgMIxwEKAwjIAQoDCMkBCgMIygEKAwjLAQoDCMwBCgMIzQEKAwjOAQoDCM8BCgMI0AEKAwjRAQoDCNIBCgMI0wEKAwjUAQoDCNUBCgMI1gEKAwjXAQoDCNgBCgMI2QEKAwjaAQoDCNsBCgMI3AEKAwjdAQoDCN4BCgMI3wEKAwjgAQoDCOEBCgMI4gEKAwjjAQoDCOQBCgMI5QEKAwjmAQoDCOcBCgMI6AEKAwjpAQoDCOoBCgMI6wEKAwjsAQoDCO0BCgMI7gEKAwjvAQoDCPABCgMI8QEKAwjyAQoDCPMBCgMI9AEKAwj1AQoDCPYBCgMI9wEKAwj4AQoDCPkBCgMI-gEKAwj7AQoDCPwBCgMI_QEKAwj-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-AIKAwj5AgoDCPoCCgMI-wIKAwj8AgoDCP0CCgMI_gIKAwj_AgoDCIADCgMIgQMKAwiCAwoDCIMDCgMIhAMKAwiFAwoDCIYDCgMIhwMKAwiIAwoDCIkDCgMIigMKAwiLAwoDCIwDCgMIjQMKAwiOAwoDCI8DCgMIkAMKAwiRAwoDCJIDCgMIkwMKAwiUAwoDCJUDCgMIlgMKAwiXAwoDCJgDCgMImQMKAwiaAwoDCJsDCgMInAMKAwidAwoDCJ4DCgMInwMKAwigAwoDCKEDCgMIogMKAwijAwoDCKQDCgMIpQMKAwimAwoDCKcDCgMIqAMKAwipAwoDCKoDCgMIqwMKAwisAwoDCK0DCgMIrgMKAwivAwoDCLADCgMIsQMKAwiyAwoDCLMDCgMItAMKAwi1AwoDCLYDCgMItwMKAwi4AwoDCLkDCgMIugMKAwi7AwoDCLwDCgMIvQMKAwi-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:CX8PIOrxJnQqFXl7wAsiHJ_1VGjoI-asNlCXb8SE8jtI2vdh9x6CqbAurSgIlAAEgotVP-nuUR38x_a9YJuXzmG5AvJ458apWQtODHIDIX6ZaIwMxjS02R7S5LNqXa0gAuU_R6bCWpZdWe2uLMkdpu5KHbDgW08g-uaP_nceDOk";
+
+    Y_UNIT_TEST(ContextText) {
+        TUserContext::TImpl context(EBlackboxEnv::Prod, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(2, context.GetKeys().size());
+        UNIT_ASSERT_NO_EXCEPTION(context.ResetKeys(NUnittest::TVMKNIFE_PUBLIC_KEYS));
+        UNIT_ASSERT_EQUAL(2, context.GetKeys().size());
+    }
+
+    Y_UNIT_TEST(ContextEnvTest) {
+        TUserContext::TImpl p(EBlackboxEnv::Prod, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(2, p.GetKeys().size());
+        UNIT_ASSERT(p.IsAllowed(tvm_keys::Prod));
+        UNIT_ASSERT(!p.IsAllowed(tvm_keys::ProdYateam));
+        UNIT_ASSERT(!p.IsAllowed(tvm_keys::Test));
+        UNIT_ASSERT(!p.IsAllowed(tvm_keys::TestYateam));
+        UNIT_ASSERT(!p.IsAllowed(tvm_keys::Stress));
+
+        TUserContext::TImpl pt(EBlackboxEnv::ProdYateam, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(2, pt.GetKeys().size());
+        UNIT_ASSERT(!pt.IsAllowed(tvm_keys::Prod));
+        UNIT_ASSERT(pt.IsAllowed(tvm_keys::ProdYateam));
+        UNIT_ASSERT(!pt.IsAllowed(tvm_keys::Test));
+        UNIT_ASSERT(!pt.IsAllowed(tvm_keys::TestYateam));
+        UNIT_ASSERT(!pt.IsAllowed(tvm_keys::Stress));
+
+        TUserContext::TImpl t(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(2, t.GetKeys().size());
+        UNIT_ASSERT(!t.IsAllowed(tvm_keys::Prod));
+        UNIT_ASSERT(!t.IsAllowed(tvm_keys::ProdYateam));
+        UNIT_ASSERT(t.IsAllowed(tvm_keys::Test));
+        UNIT_ASSERT(!t.IsAllowed(tvm_keys::TestYateam));
+        UNIT_ASSERT(!t.IsAllowed(tvm_keys::Stress));
+
+        TUserContext::TImpl tt(EBlackboxEnv::TestYateam, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(2, tt.GetKeys().size());
+        UNIT_ASSERT(!tt.IsAllowed(tvm_keys::Prod));
+        UNIT_ASSERT(!tt.IsAllowed(tvm_keys::ProdYateam));
+        UNIT_ASSERT(!tt.IsAllowed(tvm_keys::Test));
+        UNIT_ASSERT(tt.IsAllowed(tvm_keys::TestYateam));
+        UNIT_ASSERT(!tt.IsAllowed(tvm_keys::Stress));
+
+        TUserContext::TImpl s(EBlackboxEnv::Stress, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        UNIT_ASSERT_EQUAL(4, s.GetKeys().size());
+        UNIT_ASSERT(s.IsAllowed(tvm_keys::Prod));
+        UNIT_ASSERT(!s.IsAllowed(tvm_keys::ProdYateam));
+        UNIT_ASSERT(!s.IsAllowed(tvm_keys::Test));
+        UNIT_ASSERT(!s.IsAllowed(tvm_keys::TestYateam));
+        UNIT_ASSERT(s.IsAllowed(tvm_keys::Stress));
+    }
+
+    Y_UNIT_TEST(ContextExceptionsText) {
+        UNIT_ASSERT_EXCEPTION(TUserContext::TImpl(EBlackboxEnv::Prod, EMPTY_TVM_KEYS), TEmptyTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TUserContext::TImpl(EBlackboxEnv::Prod, MALFORMED_TVM_KEYS), TMalformedTvmKeysException);
+        UNIT_ASSERT_EXCEPTION(TUserContext::TImpl(EBlackboxEnv::Prod, "adcvxcv./-+"), TMalformedTvmKeysException);
+    }
+
+    Y_UNIT_TEST(Ticket1Test) {
+        TUserContext::TImpl context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_EQUAL(std::numeric_limits<time_t>::max(), checkedTicket->GetExpirationTime());
+        UNIT_ASSERT_EQUAL(TUids({456, 123}), checkedTicket->GetUids());
+        UNIT_ASSERT_EQUAL(456, checkedTicket->GetDefaultUid());
+        UNIT_ASSERT_EQUAL(TScopes({"bb:sess1", "bb:sess2"}), checkedTicket->GetScopes());
+        UNIT_ASSERT(checkedTicket->HasScope("bb:sess1"));
+        UNIT_ASSERT(checkedTicket->HasScope("bb:sess2"));
+        UNIT_ASSERT(!checkedTicket->HasScope("bb:sess3"));
+        UNIT_ASSERT_EQUAL("ticket_type=user;expiration_time=9223372036854775807;scope=bb:sess1;scope=bb:sess2;default_uid=456;uid=456;uid=123;env=Test;", checkedTicket->DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket2Test) {
+        TUserContext::TImpl context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_2);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=user;expiration_time=9223372036854775807;default_uid=456;uid=456;uid=123;env=Test;", checkedTicket->DebugInfo());
+    }
+
+    Y_UNIT_TEST(Ticket3Test) {
+        TUserContext::TImpl context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_3);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=user;expiration_time=9223372036854775807;scope=bb:sess1;scope=bb:sess10;scope=bb:sess100;scope=bb:sess11;scope=bb:sess12;scope=bb:sess13;scope=bb:sess14;scope=bb:sess15;scope=bb:sess16;scope=bb:sess17;scope=bb:sess18;scope=bb:sess19;scope=bb:sess2;scope=bb:sess20;scope=bb:sess21;scope=bb:sess22;scope=bb:sess23;scope=bb:sess24;scope=bb:sess25;scope=bb:sess26;scope=bb:sess27;scope=bb:sess28;scope=bb:sess29;scope=bb:sess3;scope=bb:sess30;scope=bb:sess31;scope=bb:sess32;scope=bb:sess33;scope=bb:sess34;scope=bb:sess35;scope=bb:sess36;scope=bb:sess37;scope=bb:sess38;scope=bb:sess39;scope=bb:sess4;scope=bb:sess40;scope=bb:sess41;scope=bb:sess42;scope=bb:sess43;scope=bb:sess44;scope=bb:sess45;scope=bb:sess46;scope=bb:sess47;scope=bb:sess48;scope=bb:sess49;scope=bb:sess5;scope=bb:sess50;scope=bb:sess51;scope=bb:sess52;scope=bb:sess53;scope=bb:sess54;scope=bb:sess55;scope=bb:sess56;scope=bb:sess57;scope=bb:sess58;scope=bb:sess59;scope=bb:sess6;scope=bb:sess60;scope=bb:sess61;scope=bb:sess62;scope=bb:sess63;scope=bb:sess64;scope=bb:sess65;scope=bb:sess66;scope=bb:sess67;scope=bb:sess68;scope=bb:sess69;scope=bb:sess7;scope=bb:sess70;scope=bb:sess71;scope=bb:sess72;scope=bb:sess73;scope=bb:sess74;scope=bb:sess75;scope=bb:sess76;scope=bb:sess77;scope=bb:sess78;scope=bb:sess79;scope=bb:sess8;scope=bb:sess80;scope=bb:sess81;scope=bb:sess82;scope=bb:sess83;scope=bb:sess84;scope=bb:sess85;scope=bb:sess86;scope=bb:sess87;scope=bb:sess88;scope=bb:sess89;scope=bb:sess9;scope=bb:sess90;scope=bb:sess91;scope=bb:sess92;scope=bb:sess93;scope=bb:sess94;scope=bb:sess95;scope=bb:sess96;scope=bb:sess97;scope=bb:sess98;scope=bb:sess99;default_uid=456;uid=0;uid=1;uid=2;uid=3;uid=4;uid=5;uid=6;uid=7;uid=8;uid=9;uid=10;uid=11;uid=12;uid=13;uid=14;uid=15;uid=16;uid=17;uid=18;uid=19;uid=20;uid=21;uid=22;uid=23;uid=24;uid=25;uid=26;uid=27;uid=28;uid=29;uid=30;uid=31;uid=32;uid=33;uid=34;uid=35;uid=36;uid=37;uid=38;uid=39;uid=40;uid=41;uid=42;uid=43;uid=44;uid=45;uid=46;uid=47;uid=48;uid=49;uid=50;uid=51;uid=52;uid=53;uid=54;uid=55;uid=56;uid=57;uid=58;uid=59;uid=60;uid=61;uid=62;uid=63;uid=64;uid=65;uid=66;uid=67;uid=68;uid=69;uid=70;uid=71;uid=72;uid=73;uid=74;uid=75;uid=76;uid=77;uid=78;uid=79;uid=80;uid=81;uid=82;uid=83;uid=84;uid=85;uid=86;uid=87;uid=88;uid=89;uid=90;uid=91;uid=92;uid=93;uid=94;uid=95;uid=96;uid=97;uid=98;uid=99;uid=100;uid=101;uid=102;uid=103;uid=104;uid=105;uid=106;uid=107;uid=108;uid=109;uid=110;uid=111;uid=112;uid=113;uid=114;uid=115;uid=116;uid=117;uid=118;uid=119;uid=120;uid=121;uid=122;uid=123;uid=124;uid=125;uid=126;uid=127;uid=128;uid=129;uid=130;uid=131;uid=132;uid=133;uid=134;uid=135;uid=136;uid=137;uid=138;uid=139;uid=140;uid=141;uid=142;uid=143;uid=144;uid=145;uid=146;uid=147;uid=148;uid=149;uid=150;uid=151;uid=152;uid=153;uid=154;uid=155;uid=156;uid=157;uid=158;uid=159;uid=160;uid=161;uid=162;uid=163;uid=164;uid=165;uid=166;uid=167;uid=168;uid=169;uid=170;uid=171;uid=172;uid=173;uid=174;uid=175;uid=176;uid=177;uid=178;uid=179;uid=180;uid=181;uid=182;uid=183;uid=184;uid=185;uid=186;uid=187;uid=188;uid=189;uid=190;uid=191;uid=192;uid=193;uid=194;uid=195;uid=196;uid=197;uid=198;uid=199;uid=200;uid=201;uid=202;uid=203;uid=204;uid=205;uid=206;uid=207;uid=208;uid=209;uid=210;uid=211;uid=212;uid=213;uid=214;uid=215;uid=216;uid=217;uid=218;uid=219;uid=220;uid=221;uid=222;uid=223;uid=224;uid=225;uid=226;uid=227;uid=228;uid=229;uid=230;uid=231;uid=232;uid=233;uid=234;uid=235;uid=236;uid=237;uid=238;uid=239;uid=240;uid=241;uid=242;uid=243;uid=244;uid=245;uid=246;uid=247;uid=248;uid=249;uid=250;uid=251;uid=252;uid=253;uid=254;uid=255;uid=256;uid=257;uid=258;uid=259;uid=260;uid=261;uid=262;uid=263;uid=264;uid=265;uid=266;uid=267;uid=268;uid=269;uid=270;uid=271;uid=272;uid=273;uid=274;uid=275;uid=276;uid=277;uid=278;uid=279;uid=280;uid=281;uid=282;uid=283;uid=284;uid=285;uid=286;uid=287;uid=288;uid=289;uid=290;uid=291;uid=292;uid=293;uid=294;uid=295;uid=296;uid=297;uid=298;uid=299;uid=300;uid=301;uid=302;uid=303;uid=304;uid=305;uid=306;uid=307;uid=308;uid=309;uid=310;uid=311;uid=312;uid=313;uid=314;uid=315;uid=316;uid=317;uid=318;uid=319;uid=320;uid=321;uid=322;uid=323;uid=324;uid=325;uid=326;uid=327;uid=328;uid=329;uid=330;uid=331;uid=332;uid=333;uid=334;uid=335;uid=336;uid=337;uid=338;uid=339;uid=340;uid=341;uid=342;uid=343;uid=344;uid=345;uid=346;uid=347;uid=348;uid=349;uid=350;uid=351;uid=352;uid=353;uid=354;uid=355;uid=356;uid=357;uid=358;uid=359;uid=360;uid=361;uid=362;uid=363;uid=364;uid=365;uid=366;uid=367;uid=368;uid=369;uid=370;uid=371;uid=372;uid=373;uid=374;uid=375;uid=376;uid=377;uid=378;uid=379;uid=380;uid=381;uid=382;uid=383;uid=384;uid=385;uid=386;uid=387;uid=388;uid=389;uid=390;uid=391;uid=392;uid=393;uid=394;uid=395;uid=396;uid=397;uid=398;uid=399;uid=400;uid=401;uid=402;uid=403;uid=404;uid=405;uid=406;uid=407;uid=408;uid=409;uid=410;uid=411;uid=412;uid=413;uid=414;uid=415;uid=416;uid=417;uid=418;uid=419;uid=420;uid=421;uid=422;uid=423;uid=424;uid=425;uid=426;uid=427;uid=428;uid=429;uid=430;uid=431;uid=432;uid=433;uid=434;uid=435;uid=436;uid=437;uid=438;uid=439;uid=440;uid=441;uid=442;uid=443;uid=444;uid=445;uid=446;uid=447;uid=448;uid=449;uid=450;uid=451;uid=452;uid=453;uid=454;uid=455;uid=456;uid=457;uid=458;uid=459;uid=460;uid=461;uid=462;uid=463;uid=464;uid=465;uid=466;uid=467;uid=468;uid=469;uid=470;uid=471;uid=472;uid=473;uid=474;uid=475;uid=476;uid=477;uid=478;uid=479;uid=480;uid=481;uid=482;uid=483;uid=484;uid=485;uid=486;uid=487;uid=488;uid=489;uid=490;uid=491;uid=492;uid=493;uid=494;uid=495;uid=496;uid=497;uid=498;uid=499;env=Test;", checkedTicket->DebugInfo());
+    }
+
+    Y_UNIT_TEST(TicketExceptionsTest) {
+        TUserContext::TImpl contextTest(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket1 = contextTest.Check(UNSUPPORTED_VERSION_USER_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::UnsupportedVersion, checkedTicket1->GetStatus());
+
+        auto checkedTicket2 = contextTest.Check(EXPIRED_USER_TICKET);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Expired, checkedTicket2->GetStatus());
+
+        TUserContext::TImpl contextProd(EBlackboxEnv::Prod, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket3 = contextProd.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::InvalidBlackboxEnv, checkedTicket3->GetStatus());
+
+        UNIT_ASSERT_EXCEPTION(checkedTicket3->GetDefaultUid(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket3->GetUids(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket3->GetScopes(), TNotAllowedException);
+        UNIT_ASSERT_EXCEPTION(checkedTicket3->HasScope(""), TNotAllowedException);
+        UNIT_ASSERT_NO_EXCEPTION(bool(*checkedTicket3));
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket3->DebugInfo());
+        UNIT_ASSERT_NO_EXCEPTION(checkedTicket3->GetStatus());
+    }
+
+    Y_UNIT_TEST(TicketProtoTest) {
+        ticket2::Ticket protobufTicket;
+        UNIT_ASSERT(protobufTicket.ParseFromString(NUtils::Base64url2bin(USER_TICKET_PROTOBUF)));
+        TTestUserTicketImpl userTicket(ETicketStatus::Ok, std::move(protobufTicket));
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, userTicket.GetStatus());
+        UNIT_ASSERT_EQUAL(std::numeric_limits<time_t>::max(), userTicket.GetExpirationTime());
+        UNIT_ASSERT_EQUAL(TUids({456, 123}), userTicket.GetUids());
+        UNIT_ASSERT_EQUAL(456, userTicket.GetDefaultUid());
+        UNIT_ASSERT_EQUAL(TScopes({"bb:sess1", "bb:sess2"}), userTicket.GetScopes());
+        UNIT_ASSERT(userTicket.HasScope("bb:sess1"));
+        UNIT_ASSERT(userTicket.HasScope("bb:sess2"));
+        UNIT_ASSERT(!userTicket.HasScope("bb:sess3"));
+    }
+
+    Y_UNIT_TEST(ResetKeysTest) {
+        TUserContext::TImpl context(EBlackboxEnv::Test, NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        context.ResetKeys(NUnittest::TVMKNIFE_PUBLIC_KEYS);
+        auto checkedTicket = context.Check(VALID_USER_TICKET_1);
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, checkedTicket->GetStatus());
+    }
+
+    Y_UNIT_TEST(CreateTicketForTests) {
+        TCheckedUserTicket t = NTvmAuth::NUnittest::CreateUserTicket(ETicketStatus::Ok, 42, {"qwerty", "omg"}, {43, 55, 47});
+        UNIT_ASSERT_EQUAL(ETicketStatus::Ok, t.GetStatus());
+        UNIT_ASSERT_EQUAL(42, t.GetDefaultUid());
+        UNIT_ASSERT_EQUAL(TUids({42, 43, 47, 55}), t.GetUids());
+        UNIT_ASSERT_EQUAL(TScopes({"omg", "qwerty"}), t.GetScopes());
+        UNIT_ASSERT_VALUES_EQUAL("ticket_type=user;scope=omg;scope=qwerty;default_uid=42;uid=42;uid=43;uid=47;uid=55;env=Test;", t.DebugInfo());
+    }
+
+    Y_UNIT_TEST(CreateForTests) {
+        TUids uids{456};
+        TScopes scopes{"scope1", "scope2", "scope3"};
+        TScopes scopesIn{"scope1", "scope2", "scope3", "scope1", ""};
+        auto t = TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 456, scopesIn, {});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(456, t->GetDefaultUid());
+        UNIT_ASSERT_VALUES_EQUAL(uids, t->GetUids());
+        UNIT_ASSERT_VALUES_EQUAL(scopes, t->GetScopes());
+
+        t = TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 456, scopesIn, {123, 456, 789});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(456, t->GetDefaultUid());
+        uids = TUids{123, 456, 789};
+        UNIT_ASSERT_VALUES_EQUAL(uids, t->GetUids());
+        UNIT_ASSERT_VALUES_EQUAL(scopes, t->GetScopes());
+
+        t = TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 456, scopesIn, {123, 789});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(456, t->GetDefaultUid());
+        uids = TUids{123, 456, 789};
+        UNIT_ASSERT_VALUES_EQUAL(uids, t->GetUids());
+        UNIT_ASSERT_VALUES_EQUAL(scopes, t->GetScopes());
+
+        t = TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 0, scopesIn, {123, 789});
+        UNIT_ASSERT_VALUES_EQUAL(ETicketStatus::Ok, t->GetStatus());
+        UNIT_ASSERT_VALUES_EQUAL(0, t->GetDefaultUid());
+        uids = TUids{123, 789};
+        UNIT_ASSERT_VALUES_EQUAL(uids, t->GetUids());
+        UNIT_ASSERT_VALUES_EQUAL(scopes, t->GetScopes());
+
+        UNIT_ASSERT_EXCEPTION_CONTAINS(TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 0, scopesIn, {}),
+                                       yexception,
+                                       "User ticket cannot contain empty uid list");
+        UNIT_ASSERT_EXCEPTION_CONTAINS(TCheckedUserTicket::TImpl::CreateTicketForTests(ETicketStatus::Ok, 0, scopesIn, {0}),
+                                       yexception,
+                                       "User ticket cannot contain empty uid list");
+    }
+}
+
+template <>
+void Out<NTvmAuth::TUids>(IOutputStream& o, const NTvmAuth::TUids& v) {
+    for (const auto& uid : v) {
+        o << uid << ",";
+    }
+}
+
+template <>
+void Out<NTvmAuth::TScopes>(IOutputStream& o, const NTvmAuth::TScopes& v) {
+    for (const auto& scope : v) {
+        o << scope << ",";
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/utils_ut.cpp b/library/cpp/tvmauth/src/ut/utils_ut.cpp
new file mode 100644
index 0000000000..c9cb81c36f
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/utils_ut.cpp
@@ -0,0 +1,95 @@
+#include <library/cpp/tvmauth/src/utils.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/generic/maybe.h>
+
+Y_UNIT_TEST_SUITE(UtilsTestSuite) {
+    static const TString VALID_SERVICE_TICKET_1 = "3:serv:CBAQ__________9_IhkI5QEQHBoIYmI6c2VzczEaCGJiOnNlc3My:WUPx1cTf05fjD1exB35T5j2DCHWH1YaLJon_a4rN-D7JfXHK1Ai4wM4uSfboHD9xmGQH7extqtlEk1tCTCGm5qbRVloJwWzCZBXo3zKX6i1oBYP_89WcjCNPVe1e8jwGdLsnu6PpxL5cn0xCksiStILH5UmDR6xfkJdnmMG94o8";
+    static const TString EXPIRED_SERVICE_TICKET = "3:serv:CBAQACIZCOUBEBwaCGJiOnNlc3MxGghiYjpzZXNzMg:IwfMNJYEqStY_SixwqJnyHOMCPR7-3HHk4uylB2oVRkthtezq-OOA7QizDvx7VABLs_iTlXuD1r5IjufNei_EiV145eaa3HIg4xCdJXCojMexf2UYJz8mF2b0YzFAy6_KWagU7xo13CyKAqzJuQf5MJcSUf0ecY9hVh36cJ51aw";
+    using namespace NTvmAuth;
+
+    Y_UNIT_TEST(base64Test) {
+        UNIT_ASSERT_VALUES_EQUAL("-hHx", NUtils::Bin2base64url("\xfa\x11\xf1"));
+        UNIT_ASSERT_VALUES_EQUAL("-hHx_g", NUtils::Bin2base64url("\xfa\x11\xf1\xfe"));
+        UNIT_ASSERT_VALUES_EQUAL("-hHx_v8", NUtils::Bin2base64url("\xfa\x11\xf1\xfe\xff"));
+
+        UNIT_ASSERT_VALUES_EQUAL("", NUtils::Base64url2bin("hHx++"));
+        UNIT_ASSERT_VALUES_EQUAL("", NUtils::Base64url2bin("&*^"));
+        UNIT_ASSERT_VALUES_EQUAL("", NUtils::Base64url2bin(""));
+        UNIT_ASSERT_VALUES_EQUAL("", NUtils::Bin2base64url(""));
+
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1", NUtils::Base64url2bin("-hHx"));
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1\xfe", NUtils::Base64url2bin("-hHx_g"));
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1\xfe", NUtils::Base64url2bin("-hHx_g="));
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1\xfe", NUtils::Base64url2bin("-hHx_g=="));
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1\xfe\xff", NUtils::Base64url2bin("-hHx_v8"));
+        UNIT_ASSERT_VALUES_EQUAL("\xfa\x11\xf1\xfe\xff", NUtils::Base64url2bin("-hHx_v8="));
+
+        UNIT_ASSERT_VALUES_EQUAL("SGVsbG8sIGV2ZXJ5Ym9keSE",
+                                 NUtils::Bin2base64url(("Hello, everybody!")));
+        UNIT_ASSERT_VALUES_EQUAL("Hello, everybody!",
+                                 NUtils::Base64url2bin(("SGVsbG8sIGV2ZXJ5Ym9keSE")));
+        UNIT_ASSERT_VALUES_EQUAL("VGhlIE1hZ2ljIFdvcmRzIGFyZSBTcXVlYW1pc2ggT3NzaWZyYWdl",
+                                 NUtils::Bin2base64url(("The Magic Words are Squeamish Ossifrage")));
+        UNIT_ASSERT_VALUES_EQUAL("The Magic Words are Squeamish Ossifrage",
+                                 NUtils::Base64url2bin(("VGhlIE1hZ2ljIFdvcmRzIGFyZSBTcXVlYW1pc2ggT3NzaWZyYWdl")));
+    }
+
+    Y_UNIT_TEST(sign) {
+        UNIT_ASSERT_VALUES_EQUAL("wkGfeuopf709ozPAeGcDMqtZXPzsWvuNJ1BL586dSug",
+                                 NUtils::SignCgiParamsForTvm(NUtils::Base64url2bin("GRMJrKnj4fOVnvOqe-WyD1"),
+                                                             "1490000000",
+                                                             "13,19",
+                                                             "bb:sess,bb:sess2"));
+
+        UNIT_ASSERT_VALUES_EQUAL("HANDYrA4ApQMQ5cfSWZk_InHWJffoXAa57P_X_B5s4M",
+                                 NUtils::SignCgiParamsForTvm(NUtils::Base64url2bin("GRMJrKnj4fOasvOqe-WyD1"),
+                                                             "1490000000",
+                                                             "13,19",
+                                                             "bb:sess,bb:sess2"));
+
+        UNIT_ASSERT_VALUES_EQUAL("T-M-3_qtjRM1dR_3hS1CRlHBTZRKK04doHXBJw-5VRk",
+                                 NUtils::SignCgiParamsForTvm(NUtils::Base64url2bin("GRMJrKnj4fOasvOqe-WyD1"),
+                                                             "1490000001",
+                                                             "13,19",
+                                                             "bb:sess,bb:sess2"));
+
+        UNIT_ASSERT_VALUES_EQUAL("gwB6M_9Jij50ZADmlDMnoyLc6AhQmtq6MClgGzO1PBE",
+                                 NUtils::SignCgiParamsForTvm(NUtils::Base64url2bin("GRMJrKnj4fOasvOqe-WyD1"),
+                                                             "1490000001",
+                                                             "13,19",
+                                                             ""));
+    }
+
+    Y_UNIT_TEST(GetExpirationTime) {
+        UNIT_ASSERT(!NTvmAuth::NInternal::TCanningKnife::GetExpirationTime("3:aadasdasdasdas"));
+
+        UNIT_ASSERT(NTvmAuth::NInternal::TCanningKnife::GetExpirationTime(VALID_SERVICE_TICKET_1));
+        UNIT_ASSERT_VALUES_EQUAL(TInstant::Seconds(std::numeric_limits<time_t>::max()),
+                                 *NTvmAuth::NInternal::TCanningKnife::GetExpirationTime(VALID_SERVICE_TICKET_1));
+
+        UNIT_ASSERT(NTvmAuth::NInternal::TCanningKnife::GetExpirationTime(EXPIRED_SERVICE_TICKET));
+        UNIT_ASSERT_VALUES_EQUAL(TInstant::Seconds(0),
+                                 *NTvmAuth::NInternal::TCanningKnife::GetExpirationTime(EXPIRED_SERVICE_TICKET));
+    }
+
+    Y_UNIT_TEST(RemoveSignatureTest) {
+        UNIT_ASSERT_VALUES_EQUAL("1:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                 NUtils::RemoveTicketSignature("1:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("2:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                 NUtils::RemoveTicketSignature("2:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("4:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds",
+                                 NUtils::RemoveTicketSignature("4:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3.serv.ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds",
+                                 NUtils::RemoveTicketSignature("3.serv.ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:",
+                                 NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:",
+                                 NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs:asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("3:serv:",
+                                 NUtils::RemoveTicketSignature("3:serv:ASDkljbjhsdbfLJHABFJHBslfbsfjs.asdxcvbxcvniueliuweklsvds"));
+        UNIT_ASSERT_VALUES_EQUAL("asdxcbvfgdsgfasdfxczvdsgfxcdvbcbvf",
+                                 NUtils::RemoveTicketSignature("asdxcbvfgdsgfasdfxczvdsgfxcdvbcbvf"));
+    }
+}
diff --git a/library/cpp/tvmauth/src/ut/version_ut.cpp b/library/cpp/tvmauth/src/ut/version_ut.cpp
new file mode 100644
index 0000000000..eeb95d1cde
--- /dev/null
+++ b/library/cpp/tvmauth/src/ut/version_ut.cpp
@@ -0,0 +1,18 @@
+#include <library/cpp/tvmauth/version.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <regex>
+
+using namespace NTvmAuth;
+
+Y_UNIT_TEST_SUITE(VersionTest) {
+    Y_UNIT_TEST(base64Test) {
+        const std::regex re(R"(^\d+\.\d+\.\d+$)");
+
+        for (size_t idx = 0; idx < 2; ++idx) {
+            TStringBuf ver = LibVersion();
+            UNIT_ASSERT(std::regex_match(ver.begin(), ver.end(), re));
+        }
+    }
+}
diff --git a/library/cpp/tvmauth/src/utils.cpp b/library/cpp/tvmauth/src/utils.cpp
new file mode 100644
index 0000000000..f56fafd97b
--- /dev/null
+++ b/library/cpp/tvmauth/src/utils.cpp
@@ -0,0 +1,162 @@
+#include "utils.h"
+
+#include "parser.h"
+
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+#include <openssl/md5.h>
+#include <openssl/sha.h>
+
+#include <util/generic/maybe.h>
+#include <util/generic/strbuf.h>
+
+#include <array>
+
+namespace {
+    constexpr const unsigned char b64_encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
+
+    constexpr std::array<unsigned char, 256> B64Init() {
+        std::array<unsigned char, 256> buf{};
+        for (auto& i : buf)
+            i = 0xff;
+
+        for (int i = 0; i < 64; ++i)
+            buf[b64_encode[i]] = i;
+
+        return buf;
+    }
+    constexpr std::array<unsigned char, 256> b64_decode = B64Init();
+}
+
+namespace NTvmAuth::NUtils {
+    TString Bin2base64url(TStringBuf buf) {
+        if (!buf) {
+            return TString();
+        }
+
+        TString res;
+        res.resize(((buf.size() + 2) / 3) << 2, 0);
+
+        const unsigned char* pB = (const unsigned char*)buf.data();
+        const unsigned char* pE = (const unsigned char*)buf.data() + buf.size();
+        unsigned char* p = (unsigned char*)res.data();
+        for (; pB + 2 < pE; pB += 3) {
+            const unsigned char a = *pB;
+            *p++ = b64_encode[(a >> 2) & 0x3F];
+            const unsigned char b = *(pB + 1);
+            *p++ = b64_encode[((a & 0x3) << 4) | ((b & 0xF0) >> 4)];
+            const unsigned char c = *(pB + 2);
+            *p++ = b64_encode[((b & 0xF) << 2) | ((c & 0xC0) >> 6)];
+            *p++ = b64_encode[c & 0x3F];
+        }
+
+        if (pB < pE) {
+            const unsigned char a = *pB;
+            *p++ = b64_encode[(a >> 2) & 0x3F];
+
+            if (pB == (pE - 1)) {
+                *p++ = b64_encode[((a & 0x3) << 4)];
+            } else {
+                const unsigned char b = *(pB + 1);
+                *p++ = b64_encode[((a & 0x3) << 4) |
+                                  ((int)(b & 0xF0) >> 4)];
+                *p++ = b64_encode[((b & 0xF) << 2)];
+            }
+        }
+
+        res.resize(p - (unsigned char*)res.data());
+        return res;
+    }
+
+    TString Base64url2bin(TStringBuf buf) {
+        const unsigned char* bufin = (const unsigned char*)buf.data();
+        if (!buf || b64_decode[*bufin] > 63) {
+            return TString();
+        }
+        const unsigned char* bufend = (const unsigned char*)buf.data() + buf.size();
+        while (++bufin < bufend && b64_decode[*bufin] < 64)
+            ;
+        int nprbytes = (bufin - (const unsigned char*)buf.data());
+        int nbytesdecoded = ((nprbytes + 3) / 4) * 3;
+
+        if (nprbytes < static_cast<int>(buf.size())) {
+            int left = buf.size() - nprbytes;
+            while (left--) {
+                if (*(bufin++) != '=')
+                    return TString();
+            }
+        }
+
+        TString res;
+        res.resize(nbytesdecoded);
+
+        unsigned char* bufout = (unsigned char*)res.data();
+        bufin = (const unsigned char*)buf.data();
+
+        while (nprbytes > 4) {
+            unsigned char a = b64_decode[*bufin];
+            unsigned char b = b64_decode[bufin[1]];
+            *(bufout++) = (unsigned char)(a << 2 | b >> 4);
+            unsigned char c = b64_decode[bufin[2]];
+            *(bufout++) = (unsigned char)(b << 4 | c >> 2);
+            unsigned char d = b64_decode[bufin[3]];
+            *(bufout++) = (unsigned char)(c << 6 | d);
+            bufin += 4;
+            nprbytes -= 4;
+        }
+
+        if (nprbytes == 1) {
+            return {}; // Impossible
+        }
+        if (nprbytes > 1) {
+            *(bufout++) = (unsigned char)(b64_decode[*bufin] << 2 | b64_decode[bufin[1]] >> 4);
+        }
+        if (nprbytes > 2) {
+            *(bufout++) = (unsigned char)(b64_decode[bufin[1]] << 4 | b64_decode[bufin[2]] >> 2);
+        }
+        if (nprbytes > 3) {
+            *(bufout++) = (unsigned char)(b64_decode[bufin[2]] << 6 | b64_decode[bufin[3]]);
+        }
+
+        int diff = (4 - nprbytes) & 3;
+        if (diff) {
+            nbytesdecoded -= (4 - nprbytes) & 3;
+            res.resize(nbytesdecoded);
+        }
+
+        return res;
+    }
+
+    TString SignCgiParamsForTvm(TStringBuf secret, TStringBuf ts, TStringBuf dstTvmId, TStringBuf scopes) {
+        TString data;
+        data.reserve(ts.size() + dstTvmId.size() + scopes.size() + 3);
+        const char DELIM = '|';
+        data.append(ts).push_back(DELIM);
+        data.append(dstTvmId).push_back(DELIM);
+        data.append(scopes).push_back(DELIM);
+
+        TString value(EVP_MAX_MD_SIZE, 0);
+        unsigned macLen = 0;
+
+        if (!::HMAC(EVP_sha256(), secret.data(), secret.size(), (unsigned char*)data.data(), data.size(),
+                    (unsigned char*)value.data(), &macLen))
+        {
+            return {};
+        }
+
+        if (macLen != EVP_MAX_MD_SIZE) {
+            value.resize(macLen);
+        }
+        return Bin2base64url(value);
+    }
+}
+
+namespace NTvmAuth::NInternal {
+    TMaybe<TInstant> TCanningKnife::GetExpirationTime(TStringBuf ticket) {
+        const TParserTickets::TRes res = TParserTickets::ParseV3(ticket, {}, TParserTickets::ServiceFlag());
+
+        return res.Status == ETicketStatus::MissingKey || res.Status == ETicketStatus::Expired
+                   ? TInstant::Seconds(res.Ticket.expirationtime())
+                   : TMaybe<TInstant>();
+    }
+}
diff --git a/library/cpp/tvmauth/src/utils.h b/library/cpp/tvmauth/src/utils.h
new file mode 100644
index 0000000000..e5847ac89f
--- /dev/null
+++ b/library/cpp/tvmauth/src/utils.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <library/cpp/tvmauth/checked_service_ticket.h>
+#include <library/cpp/tvmauth/checked_user_ticket.h>
+#include <library/cpp/tvmauth/ticket_status.h>
+
+#include <util/datetime/base.h>
+#include <util/generic/fwd.h>
+
+namespace NTvmAuth::NUtils {
+    TString Bin2base64url(TStringBuf buf);
+    TString Base64url2bin(TStringBuf buf);
+
+    TString SignCgiParamsForTvm(TStringBuf secret, TStringBuf ts, TStringBuf dstTvmId, TStringBuf scopes);
+}
+
+namespace NTvmAuth::NInternal {
+    class TCanningKnife {
+    public:
+        static TCheckedServiceTicket::TImpl* GetS(TCheckedServiceTicket& t) {
+            return t.Impl_.Release();
+        }
+
+        static TCheckedUserTicket::TImpl* GetU(TCheckedUserTicket& t) {
+            return t.Impl_.Release();
+        }
+
+        static TMaybe<TInstant> GetExpirationTime(TStringBuf ticket);
+    };
+}
diff --git a/library/cpp/tvmauth/src/version b/library/cpp/tvmauth/src/version
new file mode 100644
index 0000000000..4f5e69734c
--- /dev/null
+++ b/library/cpp/tvmauth/src/version
@@ -0,0 +1 @@
+3.4.5
diff --git a/library/cpp/tvmauth/src/version.cpp b/library/cpp/tvmauth/src/version.cpp
new file mode 100644
index 0000000000..6b389213d0
--- /dev/null
+++ b/library/cpp/tvmauth/src/version.cpp
@@ -0,0 +1,26 @@
+#include <library/cpp/resource/resource.h>
+
+#include <util/string/strip.h>
+
+namespace {
+    class TBuiltinVersion {
+    public:
+        TBuiltinVersion() {
+            Version_ = NResource::Find("/builtin/version");
+            StripInPlace(Version_);
+        }
+
+        TStringBuf Get() const {
+            return Version_;
+        }
+
+    private:
+        TString Version_;
+    };
+}
+
+namespace NTvmAuth {
+    TStringBuf LibVersion() {
+        return Singleton<TBuiltinVersion>()->Get();
+    }
+}