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#pragma once
#include <util/generic/yexception.h>
#include <util/system/compiler.h>
#include <library/cpp/digest/argonish/blake2b.h>
namespace NArgonish {
const ui32 BLAKE2B_BLOCKBYTES = 128;
const ui32 BLAKE2B_BLOCKQWORDS = BLAKE2B_BLOCKBYTES / 8;
const ui32 BLAKE2B_OUTBYTES = 64;
const ui32 BLAKE2B_KEYBYTES = 64;
const ui32 BLAKE2B_SALTBYTES = 16;
const ui32 BLAKE2B_PERSONALBYTES = 16;
template <NArgonish::EInstructionSet instructionSet>
class TBlake2B final: public IBlake2Base {
public:
virtual ~TBlake2B<instructionSet>() {
SecureZeroMemory_((void*)&State_, sizeof(State_));
SecureZeroMemory_((void*)&Param_, sizeof(Param_));
}
EInstructionSet GetInstructionSet() {
return instructionSet;
}
protected:
struct TBlake2BState {
ui64 H[8];
ui64 T[2];
ui64 F[2];
ui64 Buf[BLAKE2B_BLOCKQWORDS];
size_t BufLen;
size_t OutLen;
ui8 LastNode;
};
struct TBlake2BParam {
ui8 DigestLen; /* 1 */
ui8 KeyLen; /* 2 */
ui8 Fanout; /* 3 */
ui8 Depth; /* 4 */
ui32 LeafLength; /* 8 */
ui32 NodeOffset; /* 12 */
ui32 XofLength; /* 16 */
ui8 NodeDepth; /* 17 */
ui8 InnerLength; /* 18 */
ui8 Reserved[14]; /* 32 */
ui8 Salt[BLAKE2B_SALTBYTES]; /* 48 */
ui8 Personal[BLAKE2B_PERSONALBYTES]; /* 64 */
} Y_PACKED;
TBlake2BState State_;
TBlake2BParam Param_;
protected:
void Compress_(const ui64 block[BLAKE2B_BLOCKQWORDS]);
void InitialXor_(ui8* h, const ui8* p);
void* GetIV_() const;
static void SecureZeroMemory_(void* src, size_t len) {
static void* (*const volatile memsetv)(void*, int, size_t) = &memset;
memsetv(src, 0, len);
}
void InitParam_() {
memset(&State_, 0, sizeof(State_));
InitialXor_((ui8*)(State_.H), (const ui8*)(&Param_));
State_.OutLen = Param_.DigestLen;
}
void IncrementCounter_(const ui64 inc) {
State_.T[0] += inc;
State_.T[1] += (State_.T[0] < inc) ? 1 : 0;
}
bool IsLastBlock_() {
return State_.F[0] != 0;
}
void SetLastNode_() {
State_.F[1] = (ui64)-1;
}
void SetLastBlock_() {
if (State_.LastNode)
SetLastNode_();
State_.F[0] = (ui64)-1;
}
public:
TBlake2B(size_t outlen) {
/*
* Note that outlen check was moved to proxy class
*/
Param_.DigestLen = (ui8)outlen;
Param_.KeyLen = 0;
Param_.Fanout = 1;
Param_.Depth = 1;
Param_.LeafLength = 0;
Param_.NodeOffset = 0;
Param_.XofLength = 0;
Param_.NodeDepth = 0;
Param_.InnerLength = 0;
memset(Param_.Reserved, 0, sizeof(Param_.Reserved));
memset(Param_.Salt, 0, sizeof(Param_.Salt));
memset(Param_.Personal, 0, sizeof(Param_.Personal));
InitParam_();
}
TBlake2B(size_t outlen, const void* key, size_t keylen) {
/**
* Note that key and outlen checks were moved to proxy classes
*/
Param_.DigestLen = (ui8)outlen;
Param_.KeyLen = (ui8)keylen;
Param_.Fanout = 1;
Param_.Depth = 1;
Param_.LeafLength = 0;
Param_.NodeOffset = 0;
Param_.XofLength = 0;
Param_.NodeDepth = 0;
Param_.InnerLength = 0;
memset(Param_.Reserved, 0, sizeof(Param_.Reserved));
memset(Param_.Salt, 0, sizeof(Param_.Salt));
memset(Param_.Personal, 0, sizeof(Param_.Personal));
InitParam_();
ui8 block[BLAKE2B_BLOCKBYTES] = {0};
memcpy(block, key, keylen);
Update(block, BLAKE2B_BLOCKBYTES);
SecureZeroMemory_(block, BLAKE2B_BLOCKBYTES);
}
void Update(ui32 in) override {
Update((const void*)&in, sizeof(in));
}
void Update(const void* pin, size_t inlen) override {
const ui8* in = (ui8*)pin;
if (inlen > 0) {
size_t left = State_.BufLen;
size_t fill = BLAKE2B_BLOCKBYTES - left;
if (inlen > fill) {
State_.BufLen = 0;
memcpy((ui8*)State_.Buf + left, in, fill); /* Fill buffer */
IncrementCounter_(BLAKE2B_BLOCKBYTES);
Compress_(State_.Buf); /* Compress */
in += fill;
inlen -= fill;
while (inlen > BLAKE2B_BLOCKBYTES) {
/* to fix ubsan's unaligned report */
ui64 tmpbuf[BLAKE2B_BLOCKQWORDS];
memcpy(tmpbuf, in, BLAKE2B_BLOCKBYTES);
IncrementCounter_(BLAKE2B_BLOCKBYTES);
Compress_(tmpbuf);
in += BLAKE2B_BLOCKBYTES;
inlen -= BLAKE2B_BLOCKBYTES;
}
}
memcpy((ui8*)State_.Buf + State_.BufLen, in, inlen);
State_.BufLen += inlen;
}
}
void Final(void* out, size_t outlen) override {
if (out == nullptr || outlen < State_.OutLen)
ythrow yexception() << "out is null or outlen is too long";
if (IsLastBlock_())
ythrow yexception() << "Final can't be called several times";
IncrementCounter_(State_.BufLen);
SetLastBlock_();
memset((ui8*)State_.Buf + State_.BufLen, 0, BLAKE2B_BLOCKBYTES - State_.BufLen);
Compress_(State_.Buf);
memcpy(out, (void*)&State_.H[0], outlen);
}
};
}
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