diff options
Diffstat (limited to 'openssl/engines/ccgost/gost2001_keyx.c')
| -rw-r--r-- | openssl/engines/ccgost/gost2001_keyx.c | 514 |
1 files changed, 249 insertions, 265 deletions
diff --git a/openssl/engines/ccgost/gost2001_keyx.c b/openssl/engines/ccgost/gost2001_keyx.c index c74810285..db1bdc18f 100644 --- a/openssl/engines/ccgost/gost2001_keyx.c +++ b/openssl/engines/ccgost/gost2001_keyx.c @@ -18,291 +18,275 @@ #include "gost_lcl.h" #include "gost2001_keyx.h" - - /* Implementation of CryptoPro VKO 34.10-2001 algorithm */ -static int VKO_compute_key(unsigned char *shared_key,size_t shared_key_size,const EC_POINT *pub_key,EC_KEY *priv_key,const unsigned char *ukm) - { - unsigned char ukm_be[8],databuf[64],hashbuf[64]; - BIGNUM *UKM=NULL,*p=NULL,*order=NULL,*X=NULL,*Y=NULL; - const BIGNUM* key=EC_KEY_get0_private_key(priv_key); - EC_POINT *pnt=EC_POINT_new(EC_KEY_get0_group(priv_key)); - int i; - gost_hash_ctx hash_ctx; - BN_CTX *ctx = BN_CTX_new(); - - for (i=0;i<8;i++) - { - ukm_be[7-i]=ukm[i]; - } - BN_CTX_start(ctx); - UKM=getbnfrombuf(ukm_be,8); - p=BN_CTX_get(ctx); - order = BN_CTX_get(ctx); - X=BN_CTX_get(ctx); - Y=BN_CTX_get(ctx); - EC_GROUP_get_order(EC_KEY_get0_group(priv_key),order,ctx); - BN_mod_mul(p,key,UKM,order,ctx); - EC_POINT_mul(EC_KEY_get0_group(priv_key),pnt,NULL,pub_key,p,ctx); - EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(priv_key), - pnt,X,Y,ctx); - /*Serialize elliptic curve point same way as we do it when saving - * key */ - store_bignum(Y,databuf,32); - store_bignum(X,databuf+32,32); - /* And reverse byte order of whole buffer */ - for (i=0;i<64;i++) - { - hashbuf[63-i]=databuf[i]; - } - init_gost_hash_ctx(&hash_ctx,&GostR3411_94_CryptoProParamSet); - start_hash(&hash_ctx); - hash_block(&hash_ctx,hashbuf,64); - finish_hash(&hash_ctx,shared_key); - done_gost_hash_ctx(&hash_ctx); - BN_free(UKM); - BN_CTX_end(ctx); - BN_CTX_free(ctx); - EC_POINT_free(pnt); - return 32; - } +static int VKO_compute_key(unsigned char *shared_key, size_t shared_key_size, + const EC_POINT *pub_key, EC_KEY *priv_key, + const unsigned char *ukm) +{ + unsigned char ukm_be[8], databuf[64], hashbuf[64]; + BIGNUM *UKM = NULL, *p = NULL, *order = NULL, *X = NULL, *Y = NULL; + const BIGNUM *key = EC_KEY_get0_private_key(priv_key); + EC_POINT *pnt = EC_POINT_new(EC_KEY_get0_group(priv_key)); + int i; + gost_hash_ctx hash_ctx; + BN_CTX *ctx = BN_CTX_new(); + for (i = 0; i < 8; i++) { + ukm_be[7 - i] = ukm[i]; + } + BN_CTX_start(ctx); + UKM = getbnfrombuf(ukm_be, 8); + p = BN_CTX_get(ctx); + order = BN_CTX_get(ctx); + X = BN_CTX_get(ctx); + Y = BN_CTX_get(ctx); + EC_GROUP_get_order(EC_KEY_get0_group(priv_key), order, ctx); + BN_mod_mul(p, key, UKM, order, ctx); + EC_POINT_mul(EC_KEY_get0_group(priv_key), pnt, NULL, pub_key, p, ctx); + EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(priv_key), + pnt, X, Y, ctx); + /* + * Serialize elliptic curve point same way as we do it when saving key + */ + store_bignum(Y, databuf, 32); + store_bignum(X, databuf + 32, 32); + /* And reverse byte order of whole buffer */ + for (i = 0; i < 64; i++) { + hashbuf[63 - i] = databuf[i]; + } + init_gost_hash_ctx(&hash_ctx, &GostR3411_94_CryptoProParamSet); + start_hash(&hash_ctx); + hash_block(&hash_ctx, hashbuf, 64); + finish_hash(&hash_ctx, shared_key); + done_gost_hash_ctx(&hash_ctx); + BN_free(UKM); + BN_CTX_end(ctx); + BN_CTX_free(ctx); + EC_POINT_free(pnt); + return 32; +} /* * EVP_PKEY_METHOD callback derive. Implements VKO R 34.10-2001 * algorithm */ -int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen) +int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, + size_t *keylen) { - /* Public key of peer in the ctx field peerkey - * Our private key in the ctx pkey - * ukm is in the algorithm specific context data - */ - EVP_PKEY *my_key = EVP_PKEY_CTX_get0_pkey(ctx); - EVP_PKEY *peer_key = EVP_PKEY_CTX_get0_peerkey(ctx); - struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); - - if (!data->shared_ukm) { - GOSTerr(GOST_F_PKEY_GOST2001_DERIVE, GOST_R_UKM_NOT_SET); - return 0; - } - - if (key == NULL) { - *keylen = 32; - return 32; - } - - *keylen=VKO_compute_key(key, 32, EC_KEY_get0_public_key(EVP_PKEY_get0(peer_key)), - (EC_KEY *)EVP_PKEY_get0(my_key),data->shared_ukm); - return 1; -} + /* + * Public key of peer in the ctx field peerkey Our private key in the ctx + * pkey ukm is in the algorithm specific context data + */ + EVP_PKEY *my_key = EVP_PKEY_CTX_get0_pkey(ctx); + EVP_PKEY *peer_key = EVP_PKEY_CTX_get0_peerkey(ctx); + struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); + if (!data->shared_ukm) { + GOSTerr(GOST_F_PKEY_GOST2001_DERIVE, GOST_R_UKM_NOT_SET); + return 0; + } + if (key == NULL) { + *keylen = 32; + return 32; + } + *keylen = + VKO_compute_key(key, 32, + EC_KEY_get0_public_key(EVP_PKEY_get0(peer_key)), + (EC_KEY *)EVP_PKEY_get0(my_key), data->shared_ukm); + return 1; +} -/* - * EVP_PKEY_METHOD callback encrypt - * Implementation of GOST2001 key transport, cryptocom variation +/* + * EVP_PKEY_METHOD callback encrypt + * Implementation of GOST2001 key transport, cryptocom variation */ -/* Generates ephemeral key based on pubk algorithm - * computes shared key using VKO and returns filled up - * GOST_KEY_TRANSPORT structure +/* + * Generates ephemeral key based on pubk algorithm computes shared key using + * VKO and returns filled up GOST_KEY_TRANSPORT structure */ -/* - * EVP_PKEY_METHOD callback encrypt - * Implementation of GOST2001 key transport, cryptopo variation +/* + * EVP_PKEY_METHOD callback encrypt + * Implementation of GOST2001 key transport, cryptopo variation */ -int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out, size_t *out_len, const unsigned char *key,size_t key_len) - { - GOST_KEY_TRANSPORT *gkt=NULL; - EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx); - struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx); - const struct gost_cipher_info *param=get_encryption_params(NULL); - unsigned char ukm[8], shared_key[32], crypted_key[44]; - int ret=0; - int key_is_ephemeral=1; - gost_ctx cctx; - EVP_PKEY *sec_key=EVP_PKEY_CTX_get0_peerkey(pctx); - if (data->shared_ukm) - { - memcpy(ukm, data->shared_ukm,8); - } - else if (out) - { - - if (RAND_bytes(ukm,8)<=0) - { - GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, - GOST_R_RANDOM_GENERATOR_FAILURE); - return 0; - } - } - /* Check for private key in the peer_key of context */ - if (sec_key) - { - key_is_ephemeral=0; - if (!gost_get0_priv_key(sec_key)) - { - GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, - GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR); - goto err; - } - } - else - { - key_is_ephemeral=1; - if (out) - { - sec_key = EVP_PKEY_new(); - EVP_PKEY_assign(sec_key,EVP_PKEY_base_id(pubk),EC_KEY_new()); - EVP_PKEY_copy_parameters(sec_key,pubk); - if (!gost2001_keygen(EVP_PKEY_get0(sec_key))) - { - goto err; - } - } - } - if (!get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS) && param == gost_cipher_list) - { - param= gost_cipher_list+1; - } - if (out) - { - VKO_compute_key(shared_key,32,EC_KEY_get0_public_key(EVP_PKEY_get0(pubk)),EVP_PKEY_get0(sec_key),ukm); - gost_init(&cctx,param->sblock); - keyWrapCryptoPro(&cctx,shared_key,ukm,key,crypted_key); - } - gkt = GOST_KEY_TRANSPORT_new(); - if (!gkt) - { - goto err; - } - if(!ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, - ukm,8)) - { - goto err; - } - if (!ASN1_OCTET_STRING_set(gkt->key_info->imit,crypted_key+40,4)) - { - goto err; - } - if (!ASN1_OCTET_STRING_set(gkt->key_info->encrypted_key,crypted_key+8,32)) - { - goto err; - } - if (key_is_ephemeral) { - if (!X509_PUBKEY_set(&gkt->key_agreement_info->ephem_key,out?sec_key:pubk)) - { - GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, - GOST_R_CANNOT_PACK_EPHEMERAL_KEY); - goto err; - } - } - ASN1_OBJECT_free(gkt->key_agreement_info->cipher); - gkt->key_agreement_info->cipher = OBJ_nid2obj(param->nid); - if (key_is_ephemeral && sec_key) EVP_PKEY_free(sec_key); - if (!key_is_ephemeral) - { - /* Set control "public key from client certificate used" */ - if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, - GOST_R_CTRL_CALL_FAILED); - goto err; - } - } - if ((*out_len = i2d_GOST_KEY_TRANSPORT(gkt,out?&out:NULL))>0) ret =1; - GOST_KEY_TRANSPORT_free(gkt); - return ret; - err: - if (key_is_ephemeral && sec_key) EVP_PKEY_free(sec_key); - GOST_KEY_TRANSPORT_free(gkt); - return -1; - } -/* - * EVP_PKEY_METHOD callback decrypt - * Implementation of GOST2001 key transport, cryptopo variation +int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out, + size_t *out_len, const unsigned char *key, + size_t key_len) +{ + GOST_KEY_TRANSPORT *gkt = NULL; + EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx); + struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx); + const struct gost_cipher_info *param = get_encryption_params(NULL); + unsigned char ukm[8], shared_key[32], crypted_key[44]; + int ret = 0; + int key_is_ephemeral = 1; + gost_ctx cctx; + EVP_PKEY *sec_key = EVP_PKEY_CTX_get0_peerkey(pctx); + if (data->shared_ukm) { + memcpy(ukm, data->shared_ukm, 8); + } else if (out) { + + if (RAND_bytes(ukm, 8) <= 0) { + GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, + GOST_R_RANDOM_GENERATOR_FAILURE); + return 0; + } + } + /* Check for private key in the peer_key of context */ + if (sec_key) { + key_is_ephemeral = 0; + if (!gost_get0_priv_key(sec_key)) { + GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, + GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR); + goto err; + } + } else { + key_is_ephemeral = 1; + if (out) { + sec_key = EVP_PKEY_new(); + EVP_PKEY_assign(sec_key, EVP_PKEY_base_id(pubk), EC_KEY_new()); + EVP_PKEY_copy_parameters(sec_key, pubk); + if (!gost2001_keygen(EVP_PKEY_get0(sec_key))) { + goto err; + } + } + } + if (!get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS) + && param == gost_cipher_list) { + param = gost_cipher_list + 1; + } + if (out) { + VKO_compute_key(shared_key, 32, + EC_KEY_get0_public_key(EVP_PKEY_get0(pubk)), + EVP_PKEY_get0(sec_key), ukm); + gost_init(&cctx, param->sblock); + keyWrapCryptoPro(&cctx, shared_key, ukm, key, crypted_key); + } + gkt = GOST_KEY_TRANSPORT_new(); + if (!gkt) { + goto err; + } + if (!ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, ukm, 8)) { + goto err; + } + if (!ASN1_OCTET_STRING_set(gkt->key_info->imit, crypted_key + 40, 4)) { + goto err; + } + if (!ASN1_OCTET_STRING_set + (gkt->key_info->encrypted_key, crypted_key + 8, 32)) { + goto err; + } + if (key_is_ephemeral) { + if (!X509_PUBKEY_set + (&gkt->key_agreement_info->ephem_key, out ? sec_key : pubk)) { + GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, + GOST_R_CANNOT_PACK_EPHEMERAL_KEY); + goto err; + } + } + ASN1_OBJECT_free(gkt->key_agreement_info->cipher); + gkt->key_agreement_info->cipher = OBJ_nid2obj(param->nid); + if (key_is_ephemeral && sec_key) + EVP_PKEY_free(sec_key); + if (!key_is_ephemeral) { + /* Set control "public key from client certificate used" */ + if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) + <= 0) { + GOSTerr(GOST_F_PKEY_GOST01CP_ENCRYPT, GOST_R_CTRL_CALL_FAILED); + goto err; + } + } + if ((*out_len = i2d_GOST_KEY_TRANSPORT(gkt, out ? &out : NULL)) > 0) + ret = 1; + GOST_KEY_TRANSPORT_free(gkt); + return ret; + err: + if (key_is_ephemeral && sec_key) + EVP_PKEY_free(sec_key); + GOST_KEY_TRANSPORT_free(gkt); + return -1; +} + +/* + * EVP_PKEY_METHOD callback decrypt + * Implementation of GOST2001 key transport, cryptopo variation */ -int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key, size_t * key_len, const unsigned char *in, size_t in_len) - { - const unsigned char *p = in; - EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx); - GOST_KEY_TRANSPORT *gkt = NULL; - int ret=0; - unsigned char wrappedKey[44]; - unsigned char sharedKey[32]; - gost_ctx ctx; - const struct gost_cipher_info *param=NULL; - EVP_PKEY *eph_key=NULL, *peerkey=NULL; +int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key, + size_t *key_len, const unsigned char *in, + size_t in_len) +{ + const unsigned char *p = in; + EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx); + GOST_KEY_TRANSPORT *gkt = NULL; + int ret = 0; + unsigned char wrappedKey[44]; + unsigned char sharedKey[32]; + gost_ctx ctx; + const struct gost_cipher_info *param = NULL; + EVP_PKEY *eph_key = NULL, *peerkey = NULL; - 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_GOST01CP_DECRYPT,GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO); - return -1; - } + 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_GOST01CP_DECRYPT, + GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO); + return -1; + } - /* If key transport structure contains public key, use it */ - eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key); - if (eph_key) - { - if (EVP_PKEY_derive_set_peer(pctx, eph_key) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, - GOST_R_INCOMPATIBLE_PEER_KEY); - goto err; - } - } - else - { - /* Set control "public key from client certificate used" */ - if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) <= 0) - { - GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, - GOST_R_CTRL_CALL_FAILED); - goto err; - } - } - peerkey = EVP_PKEY_CTX_get0_peerkey(pctx); - if (!peerkey) - { - GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, - GOST_R_NO_PEER_KEY); - goto err; - } - - param = get_encryption_params(gkt->key_agreement_info->cipher); - if(!param){ + /* If key transport structure contains public key, use it */ + eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key); + if (eph_key) { + if (EVP_PKEY_derive_set_peer(pctx, eph_key) <= 0) { + GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, + GOST_R_INCOMPATIBLE_PEER_KEY); + goto err; + } + } else { + /* Set control "public key from client certificate used" */ + if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL) + <= 0) { + GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, GOST_R_CTRL_CALL_FAILED); + goto err; + } + } + peerkey = EVP_PKEY_CTX_get0_peerkey(pctx); + if (!peerkey) { + GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, GOST_R_NO_PEER_KEY); goto err; } - gost_init(&ctx,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); - VKO_compute_key(sharedKey,32,EC_KEY_get0_public_key(EVP_PKEY_get0(peerkey)), - EVP_PKEY_get0(priv),wrappedKey); - if (!keyUnwrapCryptoPro(&ctx,sharedKey,wrappedKey,key)) - { - GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, - GOST_R_ERROR_COMPUTING_SHARED_KEY); - goto err; - } - - ret=1; -err: - if (eph_key) EVP_PKEY_free(eph_key); - if (gkt) GOST_KEY_TRANSPORT_free(gkt); - return ret; - } + param = get_encryption_params(gkt->key_agreement_info->cipher); + if (!param) { + goto err; + } + + gost_init(&ctx, 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); + VKO_compute_key(sharedKey, 32, + EC_KEY_get0_public_key(EVP_PKEY_get0(peerkey)), + EVP_PKEY_get0(priv), wrappedKey); + if (!keyUnwrapCryptoPro(&ctx, sharedKey, wrappedKey, key)) { + GOSTerr(GOST_F_PKEY_GOST01CP_DECRYPT, + GOST_R_ERROR_COMPUTING_SHARED_KEY); + goto err; + } + + ret = 1; + err: + if (eph_key) + EVP_PKEY_free(eph_key); + if (gkt) + GOST_KEY_TRANSPORT_free(gkt); + return ret; +} |