X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_keyexpimp.c;h=c881e68ecd8afc7a88efc8a85774a234bec2ee20;hb=6c56684b0c460da20bfeb1e95d2d48cb56ee2c54;hp=ba19245f460b4678c26db17aca3b9f1566c4d024;hpb=9128b0a98a8f89be2830eabca0cdc0b6b344172b;p=openssl-gost%2Fengine.git diff --git a/gost_keyexpimp.c b/gost_keyexpimp.c index ba19245..c881e68 100644 --- a/gost_keyexpimp.c +++ b/gost_keyexpimp.c @@ -8,73 +8,247 @@ * Function expects that out is a preallocated buffer of length * defined as sum of shared_len and mac length defined by mac_nid * */ -int gost_kexp15(const unsigned char *shared_key, const int shared_len, - int cipher_nid, const unsigned char *cipher_key, const size_t cipher_key_len, - int mac_nid, unsigned char *mac_key, const size_t mac_key_len, - const char *iv, const size_t ivlen, - unsigned char *out, int *out_len -) +int gost_kexp15(const unsigned char *shared_key, const int shared_len, + int cipher_nid, const unsigned char *cipher_key, + int mac_nid, unsigned char *mac_key, + const unsigned char *iv, const size_t ivlen, + unsigned char *out, int *out_len) { - /* out_len = key_len + mac_len */ - unsigned char iv_full[16], mac_buf[8]; - unsigned int mac_len; - - EVP_CIPHER_CTX *ciph = NULL; - EVP_MD_CTX *mac = NULL; - - int ret = 0; - - /* we expect IV of half length */ - memset(iv_full, 0, 16); - memcpy(iv_full, iv, ivlen); - - mac = EVP_MD_CTX_new(); - if (mac == NULL) { - GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); - goto err; - } - - if(EVP_DigestInit_ex(mac, EVP_get_digestbynid(mac_nid), NULL) <= 0 - || EVP_MD_CTX_ctrl(mac, EVP_MD_CTRL_SET_KEY, mac_key_len, mac_key) <= 0 - || EVP_DigestUpdate(mac, shared_key, shared_len) <= 0 - || EVP_DigestFinal_ex(mac, mac_buf, &mac_len) <= 0) { - GOSTerr(GOST_F_GOST_KEXP15, ERR_R_INTERNAL_ERROR); - goto err; - } - - ciph = EVP_CIPHER_CTX_new(); - if (ciph == NULL) { - GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); - goto err; - } - - if (EVP_CipherInit_ex(ciph, EVP_get_cipherbynid(cipher_nid), NULL, NULL, NULL, 1) <= 0 - || EVP_CipherInit_ex(ciph, NULL, NULL, cipher_key, iv_full, 1) <= 0 - || EVP_CipherUpdate(ciph, out, out_len, shared_key, shared_len) <= 0 - || EVP_CipherFinal_ex(ciph, out, out_len) <= 0) { - GOSTerr(GOST_F_GOST_KEXP15, ERR_R_INTERNAL_ERROR); - goto err; - } - - memcpy(out + *out_len, mac_buf, mac_len); - *out_len += mac_len; - - ret = 1; + unsigned char iv_full[16], mac_buf[16]; + unsigned int mac_len; + + EVP_CIPHER_CTX *ciph = NULL; + EVP_MD_CTX *mac = NULL; + + int ret = 0; + int len; + + mac_len = (cipher_nid == NID_magma_ctr) ? 8 : + (cipher_nid == NID_grasshopper_ctr) ? 16 : 0; + + if (mac_len == 0) { + GOSTerr(GOST_F_GOST_KEXP15, GOST_R_INVALID_CIPHER); + goto err; + } + + /* we expect IV of half length */ + memset(iv_full, 0, 16); + memcpy(iv_full, iv, ivlen); + + mac = EVP_MD_CTX_new(); + if (mac == NULL) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (EVP_DigestInit_ex(mac, EVP_get_digestbynid(mac_nid), NULL) <= 0 + || EVP_MD_CTX_ctrl(mac, EVP_MD_CTRL_SET_KEY, 32, mac_key) <= 0 + || EVP_MD_CTX_ctrl(mac, EVP_MD_CTRL_MAC_LEN, mac_len, NULL) <= 0 + || EVP_DigestUpdate(mac, iv, ivlen) <= 0 + || EVP_DigestUpdate(mac, shared_key, shared_len) <= 0 + /* As we set MAC length directly, we should not allow overwriting it */ + || EVP_DigestFinal_ex(mac, mac_buf, NULL) <= 0) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_INTERNAL_ERROR); + goto err; + } + + ciph = EVP_CIPHER_CTX_new(); + if (ciph == NULL) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (EVP_CipherInit_ex + (ciph, EVP_get_cipherbynid(cipher_nid), NULL, NULL, NULL, 1) <= 0 + || EVP_CipherInit_ex(ciph, NULL, NULL, cipher_key, iv_full, 1) <= 0 + || EVP_CipherUpdate(ciph, out, &len, shared_key, shared_len) <= 0 + || EVP_CipherUpdate(ciph, out + shared_len, &len, mac_buf, mac_len) <= 0 + || EVP_CipherFinal_ex(ciph, out + shared_len + len, out_len) <= 0) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_INTERNAL_ERROR); + goto err; + } + + *out_len = shared_len + mac_len; + + ret = 1; + + err: + OPENSSL_cleanse(mac_buf, mac_len); + EVP_MD_CTX_free(mac); + EVP_CIPHER_CTX_free(ciph); + + return ret; +} + +int gost_kimp15(const unsigned char *expkey, const size_t expkeylen, + int cipher_nid, const unsigned char *cipher_key, + int mac_nid, unsigned char *mac_key, + const unsigned char *iv, const size_t ivlen, + unsigned char *shared_key, size_t shared_len) +{ + unsigned char iv_full[16], out[48], mac_buf[16]; + unsigned int mac_len; + + EVP_CIPHER_CTX *ciph = NULL; + EVP_MD_CTX *mac = NULL; + + int ret = 0; + int len; + + mac_len = (cipher_nid == NID_magma_ctr) ? 8 : + (cipher_nid == NID_grasshopper_ctr) ? 16 : 0; + + if (mac_len == 0) { + GOSTerr(GOST_F_GOST_KIMP15, GOST_R_INVALID_CIPHER); + goto err; + } + + /* we expect IV of half length */ + memset(iv_full, 0, 16); + memcpy(iv_full, iv, ivlen); + + ciph = EVP_CIPHER_CTX_new(); + if (ciph == NULL) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (EVP_CipherInit_ex + (ciph, EVP_get_cipherbynid(cipher_nid), NULL, NULL, NULL, 0) <= 0 + || EVP_CipherInit_ex(ciph, NULL, NULL, cipher_key, iv_full, 0) <= 0 + || EVP_CipherUpdate(ciph, out, &len, expkey, expkeylen) <= 0 + || EVP_CipherFinal_ex(ciph, out + len, &len) <= 0) { + GOSTerr(GOST_F_GOST_KIMP15, ERR_R_INTERNAL_ERROR); + goto err; + } + /*Now we have shared key and mac in out[] */ + + mac = EVP_MD_CTX_new(); + if (mac == NULL) { + GOSTerr(GOST_F_GOST_KEXP15, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (EVP_DigestInit_ex(mac, EVP_get_digestbynid(mac_nid), NULL) <= 0 + || EVP_MD_CTX_ctrl(mac, EVP_MD_CTRL_SET_KEY, 32, mac_key) <= 0 + || EVP_MD_CTX_ctrl(mac, EVP_MD_CTRL_MAC_LEN, mac_len, NULL) <= 0 + || EVP_DigestUpdate(mac, iv, ivlen) <= 0 + || EVP_DigestUpdate(mac, out, shared_len) <= 0 + /* As we set MAC length directly, we should not allow overwriting it */ + || EVP_DigestFinal_ex(mac, mac_buf, NULL) <= 0) { + GOSTerr(GOST_F_GOST_KIMP15, ERR_R_INTERNAL_ERROR); + goto err; + } + + if (CRYPTO_memcmp(mac_buf, out + shared_len, mac_len) != 0) { + GOSTerr(GOST_F_GOST_KIMP15, GOST_R_BAD_MAC); + goto err; + } + + memcpy(shared_key, out, shared_len); + ret = 1; err: - EVP_MD_CTX_free(mac); - EVP_CIPHER_CTX_free(ciph); + OPENSSL_cleanse(out, sizeof(out)); + EVP_MD_CTX_free(mac); + EVP_CIPHER_CTX_free(ciph); + return ret; +} + +/* + * keyout expected to be 64 bytes + * */ +int gost_keg(const unsigned char *seckey, const size_t seckey_len, + const EC_POINT *pub, const unsigned char *h, unsigned char *keyout) +{ + return 0; +} + +#ifdef ENABLE_UNIT_TESTS +# include +# include +# include + +static void hexdump(FILE *f, const char *title, const unsigned char *s, int l) +{ + int n = 0; - return ret; + fprintf(f, "%s", title); + for (; n < l; ++n) { + if ((n % 16) == 0) + fprintf(f, "\n%04x", n); + fprintf(f, " %02x", s[n]); + } + fprintf(f, "\n"); } -int gost_kimp15(const char *expkey, const size_t expkeylen, - int cipher_nid, const char *cipher_key, const size_t cipher_key_len, - int mac_nid, const char *mac_key, const size_t mac_key_len, - const char *iv, const size_t ivlen, - char *shared_key, size_t *shared_len -) +int main(void) { - return 0; + const unsigned char shared_key[] = { + 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, + 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, + 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10, + 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF + }; + + const unsigned char magma_key[] = { + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, + 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + }; + + unsigned char mac_magma_key[] = { + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, + }; + + const unsigned char magma_iv[] = { 0x67, 0xBE, 0xD6, 0x54 }; + + const unsigned char magma_export[] = { + 0xCF, 0xD5, 0xA1, 0x2D, 0x5B, 0x81, 0xB6, 0xE1, + 0xE9, 0x9C, 0x91, 0x6D, 0x07, 0x90, 0x0C, 0x6A, + 0xC1, 0x27, 0x03, 0xFB, 0x3A, 0xBD, 0xED, 0x55, + 0x56, 0x7B, 0xF3, 0x74, 0x2C, 0x89, 0x9C, 0x75, + 0x5D, 0xAF, 0xE7, 0xB4, 0x2E, 0x3A, 0x8B, 0xD9 + }; + + unsigned char buf[32 + 16]; + int ret = 0; + int outlen = 40; + + OpenSSL_add_all_algorithms(); + memset(buf, 0, sizeof(buf)); + + ret = gost_kexp15(shared_key, 32, + NID_magma_ctr, magma_key, + NID_magma_mac, mac_magma_key, magma_iv, 4, buf, &outlen); + + if (ret <= 0) + ERR_print_errors_fp(stderr); + else { + hexdump(stdout, "Magma key export", buf, 40); + if (memcmp(buf, magma_export, 40) != 0) { + fprintf(stdout, "ERROR! test failed\n"); + } + } + + ret = gost_kimp15(magma_export, 40, + NID_magma_ctr, magma_key, + NID_magma_mac, mac_magma_key, magma_iv, 4, buf, 32); + + if (ret <= 0) + ERR_print_errors_fp(stderr); + else { + hexdump(stdout, "Magma key import", buf, 32); + if (memcmp(buf, shared_key, 32) != 0) { + fprintf(stdout, "ERROR! test failed\n"); + } + } + + return 0; } +#endif