diff options
Diffstat (limited to 'openssl/engines/ccgost/gost94_keyx.c')
| -rw-r--r-- | openssl/engines/ccgost/gost94_keyx.c | 487 |
1 files changed, 237 insertions, 250 deletions
diff --git a/openssl/engines/ccgost/gost94_keyx.c b/openssl/engines/ccgost/gost94_keyx.c index 0d7d3ffe6..85f4bc899 100644 --- a/openssl/engines/ccgost/gost94_keyx.c +++ b/openssl/engines/ccgost/gost94_keyx.c @@ -4,8 +4,8 @@ * This file is distributed under the same license as OpenSSL * * * * Implements generation and parsing of GOST_KEY_TRANSPORT for * - * GOST R 34.10-94 algorithms * - * * + * GOST R 34.10-94 algorithms * + * * * Requires OpenSSL 0.9.9 for compilation * **********************************************************************/ #include <string.h> @@ -20,272 +20,259 @@ #include "gost_keywrap.h" #include "gost_lcl.h" /* Common functions for both 94 and 2001 key exchange schemes */ -/* Implementation of the Diffi-Hellman key agreement scheme based on - * GOST-94 keys */ +/* + * Implementation of the Diffi-Hellman key agreement scheme based on GOST-94 + * keys + */ -/* Computes Diffie-Hellman key and stores it into buffer in - * little-endian byte order as expected by both versions of GOST 94 - * algorithm +/* + * Computes Diffie-Hellman key and stores it into buffer in little-endian + * byte order as expected by both versions of GOST 94 algorithm */ -static int compute_pair_key_le(unsigned char *pair_key,BIGNUM *pub_key,DH *dh) - { - unsigned char be_key[128]; - int i,key_size; - key_size=DH_compute_key(be_key,pub_key,dh); - if (!key_size) return 0; - memset(pair_key,0,128); - for (i=0;i<key_size;i++) - { - pair_key[i]=be_key[key_size-1-i]; - } - return key_size; - } +static int compute_pair_key_le(unsigned char *pair_key, BIGNUM *pub_key, + DH *dh) +{ + unsigned char be_key[128]; + int i, key_size; + key_size = DH_compute_key(be_key, pub_key, dh); + if (!key_size) + return 0; + memset(pair_key, 0, 128); + for (i = 0; i < key_size; i++) { + pair_key[i] = be_key[key_size - 1 - i]; + } + return key_size; +} /* - * Computes 256 bit Key exchange key as specified in RFC 4357 + * Computes 256 bit Key exchange key as specified in RFC 4357 */ -static int make_cp_exchange_key(BIGNUM *priv_key,EVP_PKEY *pubk, unsigned char *shared_key) - { - unsigned char dh_key [128]; - int ret; - gost_hash_ctx hash_ctx; - DH *dh = DH_new(); - - if (!dh) - return 0; - memset(dh_key,0,128); - dh->g = BN_dup(pubk->pkey.dsa->g); - dh->p = BN_dup(pubk->pkey.dsa->p); - dh->priv_key = BN_dup(priv_key); - ret=compute_pair_key_le(dh_key,((DSA *)(EVP_PKEY_get0(pubk)))->pub_key,dh) ; - DH_free(dh); - if (!ret) return 0; - init_gost_hash_ctx(&hash_ctx,&GostR3411_94_CryptoProParamSet); - start_hash(&hash_ctx); - hash_block(&hash_ctx,dh_key,128); - finish_hash(&hash_ctx,shared_key); - done_gost_hash_ctx(&hash_ctx); - return 1; - } +static int make_cp_exchange_key(BIGNUM *priv_key, EVP_PKEY *pubk, + unsigned char *shared_key) +{ + unsigned char dh_key[128]; + int ret; + gost_hash_ctx hash_ctx; + DH *dh = DH_new(); + + if (!dh) + return 0; + memset(dh_key, 0, 128); + dh->g = BN_dup(pubk->pkey.dsa->g); + dh->p = BN_dup(pubk->pkey.dsa->p); + dh->priv_key = BN_dup(priv_key); + ret = + compute_pair_key_le(dh_key, ((DSA *)(EVP_PKEY_get0(pubk)))->pub_key, + dh); + DH_free(dh); + if (!ret) + return 0; + init_gost_hash_ctx(&hash_ctx, &GostR3411_94_CryptoProParamSet); + start_hash(&hash_ctx); + hash_block(&hash_ctx, dh_key, 128); + finish_hash(&hash_ctx, shared_key); + done_gost_hash_ctx(&hash_ctx); + return 1; +} /* EVP_PKEY_METHOD callback derive. Implements VKO R 34.10-94 */ -int pkey_gost94_derive(EVP_PKEY_CTX *ctx,unsigned char *key,size_t *keylen) - { - EVP_PKEY *pubk = EVP_PKEY_CTX_get0_peerkey(ctx); - EVP_PKEY *mykey = EVP_PKEY_CTX_get0_pkey(ctx); - *keylen = 32; - if (key == NULL) return 1; +int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen) +{ + EVP_PKEY *pubk = EVP_PKEY_CTX_get0_peerkey(ctx); + EVP_PKEY *mykey = EVP_PKEY_CTX_get0_pkey(ctx); + *keylen = 32; + if (key == NULL) + return 1; - return make_cp_exchange_key(gost_get0_priv_key(mykey), pubk, key); - } + return make_cp_exchange_key(gost_get0_priv_key(mykey), pubk, key); +} -/* EVP_PKEY_METHOD callback encrypt for - * GOST R 34.10-94 cryptopro modification +/* + * EVP_PKEY_METHOD callback encrypt for GOST R 34.10-94 cryptopro + * modification */ +int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, + size_t *outlen, const unsigned char *key, + size_t key_len) +{ + GOST_KEY_TRANSPORT *gkt = NULL; + unsigned char shared_key[32], ukm[8], crypted_key[44]; + const struct gost_cipher_info *param = get_encryption_params(NULL); + EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(ctx); + struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); + gost_ctx cctx; + int key_is_ephemeral = 1; + EVP_PKEY *mykey = EVP_PKEY_CTX_get0_peerkey(ctx); -int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len ) - { - GOST_KEY_TRANSPORT *gkt=NULL; - unsigned char shared_key[32], ukm[8],crypted_key[44]; - const struct gost_cipher_info *param=get_encryption_params(NULL); - EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(ctx); - struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); - gost_ctx cctx; - int key_is_ephemeral=1; - EVP_PKEY *mykey = EVP_PKEY_CTX_get0_peerkey(ctx); + /* Do not use vizir cipher parameters with cryptopro */ + if (!get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS) + && param == gost_cipher_list) { + param = gost_cipher_list + 1; + } - /* Do not use vizir cipher parameters with cryptopro */ - if (!get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS) && param == gost_cipher_list) - { - param= gost_cipher_list+1; - } + if (mykey) { + /* If key already set, it is not ephemeral */ + key_is_ephemeral = 0; + if (!gost_get0_priv_key(mykey)) { + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, + GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR); + goto err; + } + } else { + /* Otherwise generate ephemeral key */ + key_is_ephemeral = 1; + if (out) { + mykey = EVP_PKEY_new(); + EVP_PKEY_assign(mykey, EVP_PKEY_base_id(pubk), DSA_new()); + EVP_PKEY_copy_parameters(mykey, pubk); + if (!gost_sign_keygen(EVP_PKEY_get0(mykey))) { + goto err; + } + } + } + if (out) + make_cp_exchange_key(gost_get0_priv_key(mykey), pubk, shared_key); + if (data->shared_ukm) { + memcpy(ukm, data->shared_ukm, 8); + } else if (out) { + if (RAND_bytes(ukm, 8) <= 0) { + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, + GOST_R_RANDOM_GENERATOR_FAILURE); + goto err; + } + } - if (mykey) - { - /* If key already set, it is not ephemeral */ - key_is_ephemeral=0; - if (!gost_get0_priv_key(mykey)) - { - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, - GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR); - goto err; - } - } - else - { - /* Otherwise generate ephemeral key */ - key_is_ephemeral = 1; - if (out) - { - mykey = EVP_PKEY_new(); - EVP_PKEY_assign(mykey, EVP_PKEY_base_id(pubk),DSA_new()); - EVP_PKEY_copy_parameters(mykey,pubk); - if (!gost_sign_keygen(EVP_PKEY_get0(mykey))) - { - goto err; - } - } - } - if (out) - make_cp_exchange_key(gost_get0_priv_key(mykey),pubk,shared_key); - if (data->shared_ukm) - { - memcpy(ukm,data->shared_ukm,8); - } - else if (out) - { - if (RAND_bytes(ukm,8)<=0) - { - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, - GOST_R_RANDOM_GENERATOR_FAILURE); - goto err; - } - } - - if (out) { - gost_init(&cctx,param->sblock); - keyWrapCryptoPro(&cctx,shared_key,ukm,key,crypted_key); - } - gkt = GOST_KEY_TRANSPORT_new(); - if (!gkt) - { - goto memerr; - } - if(!ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, - ukm,8)) - { - goto memerr; - } - if (!ASN1_OCTET_STRING_set(gkt->key_info->imit,crypted_key+40,4)) - { - goto memerr; - } - if (!ASN1_OCTET_STRING_set(gkt->key_info->encrypted_key,crypted_key+8,32)) - { - goto memerr; - } - if (key_is_ephemeral) { - if (!X509_PUBKEY_set(&gkt->key_agreement_info->ephem_key,out?mykey:pubk)) - { - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT,GOST_R_CANNOT_PACK_EPHEMERAL_KEY); - goto err; - } - if (out) EVP_PKEY_free(mykey); - } - ASN1_OBJECT_free(gkt->key_agreement_info->cipher); - gkt->key_agreement_info->cipher = OBJ_nid2obj(param->nid); - *outlen = i2d_GOST_KEY_TRANSPORT(gkt,out?&out:NULL); - if (*outlen <= 0) - { - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT,GOST_R_ERROR_PACKING_KEY_TRANSPORT_INFO); - goto err; - } - if (!key_is_ephemeral) - { - /* Set control "public key from client certificate used" */ - if (EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, - GOST_R_CTRL_CALL_FAILED); - goto err; - } - } - GOST_KEY_TRANSPORT_free(gkt); - return 1; - memerr: - if (key_is_ephemeral) { - EVP_PKEY_free(mykey); - } - GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, - GOST_R_MALLOC_FAILURE); - err: - GOST_KEY_TRANSPORT_free(gkt); - return -1; - } + if (out) { + gost_init(&cctx, param->sblock); + keyWrapCryptoPro(&cctx, shared_key, ukm, key, crypted_key); + } + gkt = GOST_KEY_TRANSPORT_new(); + if (!gkt) { + goto memerr; + } + if (!ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, ukm, 8)) { + goto memerr; + } + if (!ASN1_OCTET_STRING_set(gkt->key_info->imit, crypted_key + 40, 4)) { + goto memerr; + } + if (!ASN1_OCTET_STRING_set + (gkt->key_info->encrypted_key, crypted_key + 8, 32)) { + goto memerr; + } + if (key_is_ephemeral) { + if (!X509_PUBKEY_set + (&gkt->key_agreement_info->ephem_key, out ? mykey : pubk)) { + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, + GOST_R_CANNOT_PACK_EPHEMERAL_KEY); + goto err; + } + if (out) + EVP_PKEY_free(mykey); + } + ASN1_OBJECT_free(gkt->key_agreement_info->cipher); + gkt->key_agreement_info->cipher = OBJ_nid2obj(param->nid); + *outlen = i2d_GOST_KEY_TRANSPORT(gkt, out ? &out : NULL); + if (*outlen <= 0) { + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, + GOST_R_ERROR_PACKING_KEY_TRANSPORT_INFO); + goto err; + } + if (!key_is_ephemeral) { + /* Set control "public key from client certificate used" */ + if (EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= + 0) { + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, GOST_R_CTRL_CALL_FAILED); + goto err; + } + } + GOST_KEY_TRANSPORT_free(gkt); + return 1; + memerr: + if (key_is_ephemeral) { + EVP_PKEY_free(mykey); + } + GOSTerr(GOST_F_PKEY_GOST94CP_ENCRYPT, GOST_R_MALLOC_FAILURE); + err: + GOST_KEY_TRANSPORT_free(gkt); + return -1; +} - -/* EVP_PLEY_METHOD callback decrypt for - * GOST R 34.10-94 cryptopro modification +/* + * EVP_PLEY_METHOD callback decrypt for GOST R 34.10-94 cryptopro + * modification */ -int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *key_len,const unsigned char *in, size_t in_len) { - const unsigned char *p = in; - GOST_KEY_TRANSPORT *gkt = NULL; - unsigned char wrappedKey[44]; - unsigned char sharedKey[32]; - gost_ctx cctx; - const struct gost_cipher_info *param=NULL; - EVP_PKEY *eph_key=NULL, *peerkey=NULL; - EVP_PKEY *priv= EVP_PKEY_CTX_get0_pkey(ctx); - - if (!key) - { - *key_len = 32; - return 1; - } - - gkt = d2i_GOST_KEY_TRANSPORT(NULL,(const unsigned char **)&p, - in_len); - if (!gkt) - { - GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT,GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO); - return 0; - } - eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key); - if (eph_key) - { - if (EVP_PKEY_derive_set_peer(ctx, eph_key) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, - GOST_R_INCOMPATIBLE_PEER_KEY); - goto err; - } - } - else - { - /* Set control "public key from client certificate used" */ - if (EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, - GOST_R_CTRL_CALL_FAILED); - goto err; - } - } - peerkey = EVP_PKEY_CTX_get0_peerkey(ctx); - if (!peerkey) - { - GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, - GOST_R_NO_PEER_KEY); - goto err; - } +int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *key, + size_t *key_len, const unsigned char *in, + size_t in_len) +{ + const unsigned char *p = in; + GOST_KEY_TRANSPORT *gkt = NULL; + unsigned char wrappedKey[44]; + unsigned char sharedKey[32]; + gost_ctx cctx; + const struct gost_cipher_info *param = NULL; + EVP_PKEY *eph_key = NULL, *peerkey = NULL; + EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(ctx); + + if (!key) { + *key_len = 32; + return 1; + } + + gkt = d2i_GOST_KEY_TRANSPORT(NULL, (const unsigned char **)&p, in_len); + if (!gkt) { + GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, + GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO); + return 0; + } + eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key); + if (eph_key) { + if (EVP_PKEY_derive_set_peer(ctx, eph_key) <= 0) { + GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, + GOST_R_INCOMPATIBLE_PEER_KEY); + goto err; + } + } else { + /* Set control "public key from client certificate used" */ + if (EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= + 0) { + GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, GOST_R_CTRL_CALL_FAILED); + goto err; + } + } + peerkey = EVP_PKEY_CTX_get0_peerkey(ctx); + if (!peerkey) { + GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, GOST_R_NO_PEER_KEY); + goto err; + } + + param = get_encryption_params(gkt->key_agreement_info->cipher); + if (!param) { + goto err; + } - param = get_encryption_params(gkt->key_agreement_info->cipher); - if(!param){ + gost_init(&cctx, param->sblock); + OPENSSL_assert(gkt->key_agreement_info->eph_iv->length == 8); + memcpy(wrappedKey, gkt->key_agreement_info->eph_iv->data, 8); + OPENSSL_assert(gkt->key_info->encrypted_key->length == 32); + memcpy(wrappedKey + 8, gkt->key_info->encrypted_key->data, 32); + OPENSSL_assert(gkt->key_info->imit->length == 4); + memcpy(wrappedKey + 40, gkt->key_info->imit->data, 4); + make_cp_exchange_key(gost_get0_priv_key(priv), peerkey, sharedKey); + if (!keyUnwrapCryptoPro(&cctx, sharedKey, wrappedKey, key)) { + GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, + GOST_R_ERROR_COMPUTING_SHARED_KEY); goto err; } - - gost_init(&cctx,param->sblock); - OPENSSL_assert(gkt->key_agreement_info->eph_iv->length==8); - memcpy(wrappedKey,gkt->key_agreement_info->eph_iv->data,8); - OPENSSL_assert(gkt->key_info->encrypted_key->length==32); - memcpy(wrappedKey+8,gkt->key_info->encrypted_key->data,32); - OPENSSL_assert(gkt->key_info->imit->length==4); - memcpy(wrappedKey+40,gkt->key_info->imit->data,4); - make_cp_exchange_key(gost_get0_priv_key(priv),peerkey,sharedKey); - if (!keyUnwrapCryptoPro(&cctx,sharedKey,wrappedKey,key)) - { - GOSTerr(GOST_F_PKEY_GOST94CP_DECRYPT, - GOST_R_ERROR_COMPUTING_SHARED_KEY); - goto err; - } - - EVP_PKEY_free(eph_key); - GOST_KEY_TRANSPORT_free(gkt); - return 1; -err: - EVP_PKEY_free(eph_key); - GOST_KEY_TRANSPORT_free(gkt); - return -1; - } + EVP_PKEY_free(eph_key); + GOST_KEY_TRANSPORT_free(gkt); + return 1; + err: + EVP_PKEY_free(eph_key); + GOST_KEY_TRANSPORT_free(gkt); + return -1; +} |