X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_keyexpimp.c;h=62dd4ae063c7c865c0e430e367d5e6a8aba50e76;hb=491b3dc9ff6aec9b9e9c116e0c531862df80a0e3;hp=4ef25c5203c0b2d3d6c58d98d06c69d3e461757d;hpb=a430c355a1d2eff5df6c96c7b6f928a609c2dd73;p=openssl-gost%2Fengine.git diff --git a/gost_keyexpimp.c b/gost_keyexpimp.c index 4ef25c5..62dd4ae 100644 --- a/gost_keyexpimp.c +++ b/gost_keyexpimp.c @@ -1,5 +1,7 @@ +#include #include #include +#include #include "gost_lcl.h" #include "e_gost_err.h" @@ -10,10 +12,9 @@ * */ 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 unsigned char *iv, const size_t ivlen, unsigned char *out, - int *out_len) + int mac_nid, unsigned char *mac_key, + const unsigned char *iv, const size_t ivlen, + unsigned char *out, int *out_len) { unsigned char iv_full[16], mac_buf[16]; unsigned int mac_len; @@ -43,7 +44,7 @@ int gost_kexp15(const unsigned char *shared_key, const int shared_len, } 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_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 @@ -81,14 +82,19 @@ int gost_kexp15(const unsigned char *shared_key, const int shared_len, return ret; } +/* + * Function expects that shared_key is a preallocated buffer + * with length defined as expkeylen - mac_len defined by mac_nid + * */ int gost_kimp15(const unsigned char *expkey, const size_t expkeylen, int cipher_nid, const unsigned char *cipher_key, - const size_t cipher_key_len, int mac_nid, char *mac_key, - const size_t mac_key_len, const char *iv, const size_t ivlen, - char *shared_key, size_t shared_len) + int mac_nid, unsigned char *mac_key, + const unsigned char *iv, const size_t ivlen, + unsigned char *shared_key) { unsigned char iv_full[16], out[48], mac_buf[16]; unsigned int mac_len; + const size_t shared_len = 32; EVP_CIPHER_CTX *ciph = NULL; EVP_MD_CTX *mac = NULL; @@ -108,6 +114,12 @@ int gost_kimp15(const unsigned char *expkey, const size_t expkeylen, memset(iv_full, 0, 16); memcpy(iv_full, iv, ivlen); + ciph = EVP_CIPHER_CTX_new(); + if (ciph == NULL) { + GOSTerr(GOST_F_GOST_KIMP15, 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 @@ -118,8 +130,14 @@ int gost_kimp15(const unsigned char *expkey, const size_t expkeylen, } /*Now we have shared key and mac in out[] */ + mac = EVP_MD_CTX_new(); + if (mac == NULL) { + GOSTerr(GOST_F_GOST_KIMP15, 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_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 @@ -144,13 +162,113 @@ int gost_kimp15(const unsigned char *expkey, const size_t expkeylen, 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) +int gost_kdftree2012_256(unsigned char *keyout, size_t keyout_len, + const unsigned char *key, size_t keylen, + const unsigned char *label, size_t label_len, + const unsigned char *seed, size_t seed_len, + const size_t representation) { - return 0; + int iters, i = 0; + unsigned char zero = 0; + unsigned char *ptr = keyout; + HMAC_CTX *ctx = NULL; + unsigned char *len_ptr = NULL; + uint32_t len_repr = htonl(keyout_len * 8); + size_t len_repr_len = 4; + + ctx = HMAC_CTX_new(); + if (ctx == NULL) { + GOSTerr(GOST_F_GOST_KDFTREE2012_256, ERR_R_MALLOC_FAILURE); + return 0; + } + + if ((keyout_len == 0) || (keyout_len % 32 != 0)) { + GOSTerr(GOST_F_GOST_KDFTREE2012_256, ERR_R_INTERNAL_ERROR); + return 0; + } + iters = keyout_len / 32; + + len_ptr = (unsigned char *)&len_repr; + while (*len_ptr == 0) { + len_ptr++; + len_repr_len--; + } + + for (i = 1; i <= iters; i++) { + uint32_t iter_net = htonl(i); + unsigned char *rep_ptr = + ((unsigned char *)&iter_net) + (4 - representation); + + if (HMAC_Init_ex(ctx, key, keylen, + EVP_get_digestbynid(NID_id_GostR3411_2012_256), + NULL) <= 0 + || HMAC_Update(ctx, rep_ptr, representation) <= 0 + || HMAC_Update(ctx, label, label_len) <= 0 + || HMAC_Update(ctx, &zero, 1) <= 0 + || HMAC_Update(ctx, seed, seed_len) <= 0 + || HMAC_Update(ctx, len_ptr, len_repr_len) <= 0 + || HMAC_Final(ctx, ptr, NULL) <= 0) { + GOSTerr(GOST_F_GOST_KDFTREE2012_256, ERR_R_INTERNAL_ERROR); + HMAC_CTX_free(ctx); + return 0; + } + + HMAC_CTX_reset(ctx); + ptr += 32; + } + + HMAC_CTX_free(ctx); + + return 1; +} + +int gost_tlstree(int cipher_nid, const unsigned char *in, unsigned char *out, + const unsigned char *tlsseq) +{ +#ifndef L_ENDIAN + uint64_t gh_c1 = 0xFFFFFFFF00000000, gh_c2 = 0xFFFFFFFFFFF80000, + gh_c3 = 0xFFFFFFFFFFFFFFC0; + uint64_t mg_c1 = 0xFFFFFFC000000000, mg_c2 = 0xFFFFFFFFFE000000, + mg_c3 = 0xFFFFFFFFFFFFF000; +#else + uint64_t gh_c1 = 0x00000000FFFFFFFF, gh_c2 = 0x0000F8FFFFFFFFFF, + gh_c3 = 0xC0FFFFFFFFFFFFFF; + uint64_t mg_c1 = 0x00000000C0FFFFFF, mg_c2 = 0x000000FEFFFFFFFF, + mg_c3 = 0x00F0FFFFFFFFFFFF; +#endif + uint64_t c1, c2, c3; + uint64_t seed1, seed2, seed3; + uint64_t seq; + unsigned char ko1[32], ko2[32]; + + switch (cipher_nid) { + case NID_magma_cbc: + c1 = mg_c1; + c2 = mg_c2; + c3 = mg_c3; + break; + case NID_grasshopper_cbc: + c1 = gh_c1; + c2 = gh_c2; + c3 = gh_c3; + break; + default: + return 0; + } + memcpy(&seq, tlsseq, 8); + seed1 = seq & c1; + seed2 = seq & c2; + seed3 = seq & c3; + + if (gost_kdftree2012_256(ko1, 32, in, 32, (const unsigned char *)"level1", 6, + (const unsigned char *)&seed1, 8, 1) <= 0 + || gost_kdftree2012_256(ko2, 32, ko1, 32, (const unsigned char *)"level2", 6, + (const unsigned char *)&seed2, 8, 1) <= 0 + || gost_kdftree2012_256(out, 32, ko2, 32, (const unsigned char *)"level3", 6, + (const unsigned char *)&seed3, 8, 1) <= 0) + return 0; + + return 1; } #ifdef ENABLE_UNIT_TESTS @@ -173,7 +291,7 @@ static void hexdump(FILE *f, const char *title, const unsigned char *s, int l) int main(void) { - const unsigned char key[] = { + 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, @@ -196,25 +314,62 @@ int main(void) 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, + 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 kdftree_key[] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, + }; + + unsigned char kdf_label[] = { 0x26, 0xBD, 0xB8, 0x78 }; + unsigned char kdf_seed[] = + { 0xAF, 0x21, 0x43, 0x41, 0x45, 0x65, 0x63, 0x78 }; + const unsigned char kdf_etalon[] = { + 0x22, 0xB6, 0x83, 0x78, 0x45, 0xC6, 0xBE, 0xF6, + 0x5E, 0xA7, 0x16, 0x72, 0xB2, 0x65, 0x83, 0x10, + 0x86, 0xD3, 0xC7, 0x6A, 0xEB, 0xE6, 0xDA, 0xE9, + 0x1C, 0xAD, 0x51, 0xD8, 0x3F, 0x79, 0xD1, 0x6B, + 0x07, 0x4C, 0x93, 0x30, 0x59, 0x9D, 0x7F, 0x8D, + 0x71, 0x2F, 0xCA, 0x54, 0x39, 0x2F, 0x4D, 0xDD, + 0xE9, 0x37, 0x51, 0x20, 0x6B, 0x35, 0x84, 0xC8, + 0xF4, 0x3F, 0x9E, 0x6D, 0xC5, 0x15, 0x31, 0xF9 + }; + + const unsigned char tlstree_gh_etalon[] = { + 0x50, 0x76, 0x42, 0xd9, 0x58, 0xc5, 0x20, 0xc6, + 0xd7, 0xee, 0xf5, 0xca, 0x8a, 0x53, 0x16, 0xd4, + 0xf3, 0x4b, 0x85, 0x5d, 0x2d, 0xd4, 0xbc, 0xbf, + 0x4e, 0x5b, 0xf0, 0xff, 0x64, 0x1a, 0x19, 0xff, + }; + unsigned char buf[32 + 16]; int ret = 0; int outlen = 40; + unsigned char kdf_result[64]; + + unsigned char kroot[32]; + unsigned char tlsseq[8]; + unsigned char out[32]; OpenSSL_add_all_algorithms(); memset(buf, 0, sizeof(buf)); - ret = gost_kexp15(key, 32, - NID_magma_ctr, magma_key, 32, - NID_magma_mac, mac_magma_key, 32, - magma_iv, 4, buf, &outlen); + memset(kroot, 0xFF, 32); + memset(tlsseq, 0, 8); + tlsseq[7] = 63; + memset(out, 0, 32); + + 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); @@ -225,6 +380,40 @@ int main(void) } } + ret = gost_kimp15(magma_export, 40, + NID_magma_ctr, magma_key, + NID_magma_mac, mac_magma_key, magma_iv, 4, buf); + + 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"); + } + } + + ret = gost_kdftree2012_256(kdf_result, 64, kdftree_key, 32, kdf_label, 4, + kdf_seed, 8, 1); + if (ret <= 0) + ERR_print_errors_fp(stderr); + else { + hexdump(stdout, "KDF TREE", kdf_result, 64); + if (memcmp(kdf_result, kdf_etalon, 64) != 0) { + fprintf(stdout, "ERROR! test failed\n"); + } + } + + ret = gost_tlstree(NID_grasshopper_cbc, kroot, out, tlsseq); + if (ret <= 0) + ERR_print_errors_fp(stderr); + else { + hexdump(stdout, "Gost TLSTREE - grasshopper", out, 32); + if (memcmp(out, tlstree_gh_etalon, 32) != 0) { + fprintf(stdout, "ERROR! test failed\n"); + } + } + return 0; }