+#include <arpa/inet.h>
#include <string.h>
#include <openssl/evp.h>
+#include <openssl/hmac.h>
#include "gost_lcl.h"
#include "e_gost_err.h"
* 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:
- EVP_MD_CTX_free(mac);
- EVP_CIPHER_CTX_free(ciph);
+ OPENSSL_cleanse(mac_buf, mac_len);
+ EVP_MD_CTX_free(mac);
+ EVP_CIPHER_CTX_free(ciph);
- return ret;
+ return ret;
}
-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
-)
+/*
+ * 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,
+ int mac_nid, unsigned char *mac_key,
+ const unsigned char *iv, const size_t ivlen,
+ unsigned char *shared_key)
{
- return 0;
+ 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;
+
+ 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_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
+ || 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_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, 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:
+ OPENSSL_cleanse(out, sizeof(out));
+ EVP_MD_CTX_free(mac);
+ EVP_CIPHER_CTX_free(ciph);
+ return ret;
+}
+
+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)
+{
+ 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
+# include <stdio.h>
+# include <string.h>
+# include <openssl/obj_mac.h>
+
+static void hexdump(FILE *f, const char *title, const unsigned char *s, int l)
+{
+ int n = 0;
+
+ 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 main(void)
+{
+ 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 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));
+
+ 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);
+ 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);
+
+ 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;
}
+#endif
projects / openssl-gost / engine.git / blobdiff