path: root/contrib/libs/openssl/apps/pkeyutl.c

/* 
 * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
 * 
 * Licensed under the OpenSSL license (the "License").  You may not use 
 * this file except in compliance with the License.  You can obtain a copy 
 * in the file LICENSE in the source distribution or at 
 * https://www.openssl.org/source/license.html 
 */ 
 
#include "apps.h" 
#include "progs.h" 
#include <string.h> 
#include <openssl/err.h> 
#include <openssl/pem.h> 
#include <openssl/evp.h> 
 
#define KEY_NONE        0 
#define KEY_PRIVKEY     1 
#define KEY_PUBKEY      2 
#define KEY_CERT        3 
 
static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize, 
                              const char *keyfile, int keyform, int key_type, 
                              char *passinarg, int pkey_op, ENGINE *e, 
                              const int impl); 
 
static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file, 
                      ENGINE *e); 
 
static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op, 
                    unsigned char *out, size_t *poutlen, 
                    const unsigned char *in, size_t inlen); 
 
typedef enum OPTION_choice { 
    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 
    OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT, 
    OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN, 
    OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT, 
    OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN, 
    OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_KDF, OPT_KDFLEN, 
    OPT_R_ENUM 
} OPTION_CHOICE; 
 
const OPTIONS pkeyutl_options[] = { 
    {"help", OPT_HELP, '-', "Display this summary"}, 
    {"in", OPT_IN, '<', "Input file - default stdin"}, 
    {"out", OPT_OUT, '>', "Output file - default stdout"}, 
    {"pubin", OPT_PUBIN, '-', "Input is a public key"}, 
    {"certin", OPT_CERTIN, '-', "Input is a cert with a public key"}, 
    {"asn1parse", OPT_ASN1PARSE, '-', "asn1parse the output data"}, 
    {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"}, 
    {"sign", OPT_SIGN, '-', "Sign input data with private key"}, 
    {"verify", OPT_VERIFY, '-', "Verify with public key"}, 
    {"verifyrecover", OPT_VERIFYRECOVER, '-', 
     "Verify with public key, recover original data"}, 
    {"rev", OPT_REV, '-', "Reverse the order of the input buffer"}, 
    {"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"}, 
    {"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"}, 
    {"derive", OPT_DERIVE, '-', "Derive shared secret"}, 
    {"kdf", OPT_KDF, 's', "Use KDF algorithm"}, 
    {"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"}, 
    {"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"}, 
    {"inkey", OPT_INKEY, 's', "Input private key file"}, 
    {"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"}, 
    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, 
    {"peerform", OPT_PEERFORM, 'E', "Peer key format - default PEM"}, 
    {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"}, 
    {"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"}, 
    OPT_R_OPTIONS, 
#ifndef OPENSSL_NO_ENGINE 
    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 
    {"engine_impl", OPT_ENGINE_IMPL, '-', 
     "Also use engine given by -engine for crypto operations"}, 
#endif 
    {NULL} 
}; 
 
int pkeyutl_main(int argc, char **argv) 
{ 
    BIO *in = NULL, *out = NULL; 
    ENGINE *e = NULL; 
    EVP_PKEY_CTX *ctx = NULL; 
    char *infile = NULL, *outfile = NULL, *sigfile = NULL, *passinarg = NULL; 
    char hexdump = 0, asn1parse = 0, rev = 0, *prog; 
    unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL; 
    OPTION_CHOICE o; 
    int buf_inlen = 0, siglen = -1, keyform = FORMAT_PEM, peerform = FORMAT_PEM; 
    int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY; 
    int engine_impl = 0; 
    int ret = 1, rv = -1; 
    size_t buf_outlen; 
    const char *inkey = NULL; 
    const char *peerkey = NULL; 
    const char *kdfalg = NULL; 
    int kdflen = 0; 
    STACK_OF(OPENSSL_STRING) *pkeyopts = NULL; 
 
    prog = opt_init(argc, argv, pkeyutl_options); 
    while ((o = opt_next()) != OPT_EOF) { 
        switch (o) { 
        case OPT_EOF: 
        case OPT_ERR: 
 opthelp: 
            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 
            goto end; 
        case OPT_HELP: 
            opt_help(pkeyutl_options); 
            ret = 0; 
            goto end; 
        case OPT_IN: 
            infile = opt_arg(); 
            break; 
        case OPT_OUT: 
            outfile = opt_arg(); 
            break; 
        case OPT_SIGFILE: 
            sigfile = opt_arg(); 
            break; 
        case OPT_ENGINE_IMPL: 
            engine_impl = 1; 
            break; 
        case OPT_INKEY: 
            inkey = opt_arg(); 
            break; 
        case OPT_PEERKEY: 
            peerkey = opt_arg(); 
            break; 
        case OPT_PASSIN: 
            passinarg = opt_arg(); 
            break; 
        case OPT_PEERFORM: 
            if (!opt_format(opt_arg(), OPT_FMT_PDE, &peerform)) 
                goto opthelp; 
            break; 
        case OPT_KEYFORM: 
            if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyform)) 
                goto opthelp; 
            break; 
        case OPT_R_CASES: 
            if (!opt_rand(o)) 
                goto end; 
            break; 
        case OPT_ENGINE: 
            e = setup_engine(opt_arg(), 0); 
            break; 
        case OPT_PUBIN: 
            key_type = KEY_PUBKEY; 
            break; 
        case OPT_CERTIN: 
            key_type = KEY_CERT; 
            break; 
        case OPT_ASN1PARSE: 
            asn1parse = 1; 
            break; 
        case OPT_HEXDUMP: 
            hexdump = 1; 
            break; 
        case OPT_SIGN: 
            pkey_op = EVP_PKEY_OP_SIGN; 
            break; 
        case OPT_VERIFY: 
            pkey_op = EVP_PKEY_OP_VERIFY; 
            break; 
        case OPT_VERIFYRECOVER: 
            pkey_op = EVP_PKEY_OP_VERIFYRECOVER; 
            break; 
        case OPT_ENCRYPT: 
            pkey_op = EVP_PKEY_OP_ENCRYPT; 
            break; 
        case OPT_DECRYPT: 
            pkey_op = EVP_PKEY_OP_DECRYPT; 
            break; 
        case OPT_DERIVE: 
            pkey_op = EVP_PKEY_OP_DERIVE; 
            break; 
        case OPT_KDF: 
            pkey_op = EVP_PKEY_OP_DERIVE; 
            key_type = KEY_NONE; 
            kdfalg = opt_arg(); 
            break; 
        case OPT_KDFLEN: 
            kdflen = atoi(opt_arg()); 
            break; 
        case OPT_REV: 
            rev = 1; 
            break; 
        case OPT_PKEYOPT: 
            if ((pkeyopts == NULL && 
                 (pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) || 
                sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) { 
                BIO_puts(bio_err, "out of memory\n"); 
                goto end; 
            } 
            break; 
        } 
    } 
    argc = opt_num_rest(); 
    if (argc != 0) 
        goto opthelp; 
 
    if (kdfalg != NULL) { 
        if (kdflen == 0) { 
            BIO_printf(bio_err, 
                       "%s: no KDF length given (-kdflen parameter).\n", prog); 
            goto opthelp; 
        } 
    } else if (inkey == NULL) { 
        BIO_printf(bio_err, 
                   "%s: no private key given (-inkey parameter).\n", prog); 
        goto opthelp; 
    } else if (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE) { 
        BIO_printf(bio_err, 
                   "%s: no peer key given (-peerkey parameter).\n", prog); 
        goto opthelp; 
    } 
    ctx = init_ctx(kdfalg, &keysize, inkey, keyform, key_type, 
                   passinarg, pkey_op, e, engine_impl); 
    if (ctx == NULL) { 
        BIO_printf(bio_err, "%s: Error initializing context\n", prog); 
        ERR_print_errors(bio_err); 
        goto end; 
    } 
    if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) { 
        BIO_printf(bio_err, "%s: Error setting up peer key\n", prog); 
        ERR_print_errors(bio_err); 
        goto end; 
    } 
    if (pkeyopts != NULL) { 
        int num = sk_OPENSSL_STRING_num(pkeyopts); 
        int i; 
 
        for (i = 0; i < num; ++i) { 
            const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i); 
 
            if (pkey_ctrl_string(ctx, opt) <= 0) { 
                BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n", 
                           prog, opt); 
                ERR_print_errors(bio_err); 
                goto end; 
            } 
        } 
    } 
 
    if (sigfile != NULL && (pkey_op != EVP_PKEY_OP_VERIFY)) { 
        BIO_printf(bio_err, 
                   "%s: Signature file specified for non verify\n", prog); 
        goto end; 
    } 
 
    if (sigfile == NULL && (pkey_op == EVP_PKEY_OP_VERIFY)) { 
        BIO_printf(bio_err, 
                   "%s: No signature file specified for verify\n", prog); 
        goto end; 
    } 
 
    if (pkey_op != EVP_PKEY_OP_DERIVE) { 
        in = bio_open_default(infile, 'r', FORMAT_BINARY); 
        if (in == NULL) 
            goto end; 
    } 
    out = bio_open_default(outfile, 'w', FORMAT_BINARY); 
    if (out == NULL) 
        goto end; 
 
    if (sigfile != NULL) { 
        BIO *sigbio = BIO_new_file(sigfile, "rb"); 
 
        if (sigbio == NULL) { 
            BIO_printf(bio_err, "Can't open signature file %s\n", sigfile); 
            goto end; 
        } 
        siglen = bio_to_mem(&sig, keysize * 10, sigbio); 
        BIO_free(sigbio); 
        if (siglen < 0) { 
            BIO_printf(bio_err, "Error reading signature data\n"); 
            goto end; 
        } 
    } 
 
    if (in != NULL) { 
        /* Read the input data */ 
        buf_inlen = bio_to_mem(&buf_in, keysize * 10, in); 
        if (buf_inlen < 0) { 
            BIO_printf(bio_err, "Error reading input Data\n"); 
            goto end; 
        } 
        if (rev) { 
            size_t i; 
            unsigned char ctmp; 
            size_t l = (size_t)buf_inlen; 
            for (i = 0; i < l / 2; i++) { 
                ctmp = buf_in[i]; 
                buf_in[i] = buf_in[l - 1 - i]; 
                buf_in[l - 1 - i] = ctmp; 
            } 
        } 
    } 
 
    /* Sanity check the input */ 
    if (buf_inlen > EVP_MAX_MD_SIZE 
            && (pkey_op == EVP_PKEY_OP_SIGN 
                || pkey_op == EVP_PKEY_OP_VERIFY)) {
        BIO_printf(bio_err, 
                   "Error: The input data looks too long to be a hash\n"); 
        goto end; 
    } 
 
    if (pkey_op == EVP_PKEY_OP_VERIFY) { 
        rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen, 
                             buf_in, (size_t)buf_inlen); 
        if (rv == 1) { 
            BIO_puts(out, "Signature Verified Successfully\n"); 
            ret = 0; 
        } else { 
            BIO_puts(out, "Signature Verification Failure\n"); 
        } 
        goto end; 
    } 
    if (kdflen != 0) { 
        buf_outlen = kdflen; 
        rv = 1; 
    } else { 
        rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen, 
                      buf_in, (size_t)buf_inlen); 
    } 
    if (rv > 0 && buf_outlen != 0) { 
        buf_out = app_malloc(buf_outlen, "buffer output"); 
        rv = do_keyop(ctx, pkey_op, 
                      buf_out, (size_t *)&buf_outlen, 
                      buf_in, (size_t)buf_inlen); 
    } 
    if (rv <= 0) { 
        if (pkey_op != EVP_PKEY_OP_DERIVE) { 
            BIO_puts(bio_err, "Public Key operation error\n"); 
        } else { 
            BIO_puts(bio_err, "Key derivation failed\n"); 
        } 
        ERR_print_errors(bio_err); 
        goto end; 
    } 
    ret = 0; 
 
    if (asn1parse) { 
        if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1)) 
            ERR_print_errors(bio_err); 
    } else if (hexdump) { 
        BIO_dump(out, (char *)buf_out, buf_outlen); 
    } else { 
        BIO_write(out, buf_out, buf_outlen); 
    } 
 
 end: 
    EVP_PKEY_CTX_free(ctx); 
    release_engine(e); 
    BIO_free(in); 
    BIO_free_all(out); 
    OPENSSL_free(buf_in); 
    OPENSSL_free(buf_out); 
    OPENSSL_free(sig); 
    sk_OPENSSL_STRING_free(pkeyopts); 
    return ret; 
} 
 
static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize, 
                              const char *keyfile, int keyform, int key_type, 
                              char *passinarg, int pkey_op, ENGINE *e, 
                              const int engine_impl) 
{ 
    EVP_PKEY *pkey = NULL; 
    EVP_PKEY_CTX *ctx = NULL; 
    ENGINE *impl = NULL; 
    char *passin = NULL; 
    int rv = -1; 
    X509 *x; 
    if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT) 
         || (pkey_op == EVP_PKEY_OP_DERIVE)) 
        && (key_type != KEY_PRIVKEY && kdfalg == NULL)) { 
        BIO_printf(bio_err, "A private key is needed for this operation\n"); 
        goto end; 
    } 
    if (!app_passwd(passinarg, NULL, &passin, NULL)) { 
        BIO_printf(bio_err, "Error getting password\n"); 
        goto end; 
    } 
    switch (key_type) { 
    case KEY_PRIVKEY: 
        pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key"); 
        break; 
 
    case KEY_PUBKEY: 
        pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "Public Key"); 
        break; 
 
    case KEY_CERT: 
        x = load_cert(keyfile, keyform, "Certificate"); 
        if (x) { 
            pkey = X509_get_pubkey(x); 
            X509_free(x); 
        } 
        break; 
 
    case KEY_NONE: 
        break; 
 
    } 
 
#ifndef OPENSSL_NO_ENGINE 
    if (engine_impl) 
        impl = e; 
#endif 
 
    if (kdfalg != NULL) { 
        int kdfnid = OBJ_sn2nid(kdfalg); 
 
        if (kdfnid == NID_undef) { 
            kdfnid = OBJ_ln2nid(kdfalg); 
            if (kdfnid == NID_undef) { 
                BIO_printf(bio_err, "The given KDF \"%s\" is unknown.\n", 
                           kdfalg); 
                goto end; 
            } 
        } 
        ctx = EVP_PKEY_CTX_new_id(kdfnid, impl); 
    } else { 
        if (pkey == NULL) 
            goto end; 
        *pkeysize = EVP_PKEY_size(pkey); 
        ctx = EVP_PKEY_CTX_new(pkey, impl); 
        EVP_PKEY_free(pkey); 
    } 
 
    if (ctx == NULL) 
        goto end; 
 
    switch (pkey_op) { 
    case EVP_PKEY_OP_SIGN: 
        rv = EVP_PKEY_sign_init(ctx); 
        break; 
 
    case EVP_PKEY_OP_VERIFY: 
        rv = EVP_PKEY_verify_init(ctx); 
        break; 
 
    case EVP_PKEY_OP_VERIFYRECOVER: 
        rv = EVP_PKEY_verify_recover_init(ctx); 
        break; 
 
    case EVP_PKEY_OP_ENCRYPT: 
        rv = EVP_PKEY_encrypt_init(ctx); 
        break; 
 
    case EVP_PKEY_OP_DECRYPT: 
        rv = EVP_PKEY_decrypt_init(ctx); 
        break; 
 
    case EVP_PKEY_OP_DERIVE: 
        rv = EVP_PKEY_derive_init(ctx); 
        break; 
    } 
 
    if (rv <= 0) { 
        EVP_PKEY_CTX_free(ctx); 
        ctx = NULL; 
    } 
 
 end: 
    OPENSSL_free(passin); 
    return ctx; 
 
} 
 
static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file, 
                      ENGINE *e) 
{ 
    EVP_PKEY *peer = NULL; 
    ENGINE *engine = NULL; 
    int ret; 
 
    if (peerform == FORMAT_ENGINE) 
        engine = e; 
    peer = load_pubkey(file, peerform, 0, NULL, engine, "Peer Key"); 
    if (peer == NULL) { 
        BIO_printf(bio_err, "Error reading peer key %s\n", file); 
        ERR_print_errors(bio_err); 
        return 0; 
    } 
 
    ret = EVP_PKEY_derive_set_peer(ctx, peer); 
 
    EVP_PKEY_free(peer); 
    if (ret <= 0) 
        ERR_print_errors(bio_err); 
    return ret; 
} 
 
static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op, 
                    unsigned char *out, size_t *poutlen, 
                    const unsigned char *in, size_t inlen) 
{ 
    int rv = 0; 
    switch (pkey_op) { 
    case EVP_PKEY_OP_VERIFYRECOVER: 
        rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen); 
        break; 
 
    case EVP_PKEY_OP_SIGN: 
        rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen); 
        break; 
 
    case EVP_PKEY_OP_ENCRYPT: 
        rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen); 
        break; 
 
    case EVP_PKEY_OP_DECRYPT: 
        rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen); 
        break; 
 
    case EVP_PKEY_OP_DERIVE: 
        rv = EVP_PKEY_derive(ctx, out, poutlen); 
        break; 
 
    } 
    return rv; 
}