+ else if (alg_k & SSL_kGOST)
+ {
+ /* GOST key exchange message creation */
+ EVP_PKEY_CTX *pkey_ctx;
+ X509 *peer_cert;
+ size_t msglen;
+ unsigned int md_len;
+ int keytype;
+ unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
+ EVP_MD_CTX *ukm_hash;
+ EVP_PKEY *pub_key;
+
+ /* Get server sertificate PKEY and create ctx from it */
+ peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
+ if (!peer_cert)
+ peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
+ if (!peer_cert) {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
+ goto err;
+ }
+
+ pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
+ /* If we have send a certificate, and certificate key
+
+ * parameters match those of server certificate, use
+ * certificate key for key exchange
+ */
+
+ /* Otherwise, generate ephemeral key pair */
+
+ EVP_PKEY_encrypt_init(pkey_ctx);
+ /* Generate session key */
+ RAND_bytes(premaster_secret,32);
+ /* If we have client certificate, use its secret as peer key */
+ if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
+ if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
+ /* If there was an error - just ignore it. Ephemeral key
+ * would be used
+ */
+ ERR_clear_error();
+ }
+ }
+ /* Compute shared IV and store it in algorithm-specific
+ * context data */
+ ukm_hash = EVP_MD_CTX_create();
+ EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
+ EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
+ EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
+ EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
+ EVP_MD_CTX_destroy(ukm_hash);
+ if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
+ 8,shared_ukm)<0) {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ SSL_R_LIBRARY_BUG);
+ goto err;
+ }
+ /* Make GOST keytransport blob message */
+ /*Encapsulate it into sequence */
+ *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
+ msglen=255;
+ if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ SSL_R_LIBRARY_BUG);
+ goto err;
+ }
+ if (msglen >= 0x80)
+ {
+ *(p++)=0x81;
+ *(p++)= msglen & 0xff;
+ n=msglen+3;
+ }
+ else
+ {
+ *(p++)= msglen & 0xff;
+ n=msglen+2;
+ }
+ memcpy(p, tmp, msglen);
+ /* Check if pubkey from client certificate was used */
+ if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
+ {
+ /* Set flag "skip certificate verify" */
+ s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
+ }
+ EVP_PKEY_CTX_free(pkey_ctx);
+ s->session->master_key_length=
+ s->method->ssl3_enc->generate_master_secret(s,
+ s->session->master_key,premaster_secret,32);
+ EVP_PKEY_free(pub_key);
+
+ }
+#ifndef OPENSSL_NO_SRP
+ else if (alg_k & SSL_kSRP)
+ {
+ if (s->srp_ctx.A != NULL)
+ {
+ /* send off the data */
+ n=BN_num_bytes(s->srp_ctx.A);
+ s2n(n,p);
+ BN_bn2bin(s->srp_ctx.A,p);
+ n+=2;
+ }
+ else
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ if (s->session->srp_username != NULL)
+ OPENSSL_free(s->session->srp_username);
+ s->session->srp_username = BUF_strdup(s->srp_ctx.login);
+ if (s->session->srp_username == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ }
+#endif
+#ifndef OPENSSL_NO_PSK
+ else if (alg_k & SSL_kPSK)
+ {
+ char identity[PSK_MAX_IDENTITY_LEN];
+ unsigned char *t = NULL;
+ unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
+ unsigned int pre_ms_len = 0, psk_len = 0;
+ int psk_err = 1;
+
+ n = 0;
+ if (s->psk_client_callback == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_NO_CLIENT_CB);
+ goto err;
+ }
+
+ psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
+ identity, PSK_MAX_IDENTITY_LEN,
+ psk_or_pre_ms, sizeof(psk_or_pre_ms));
+ if (psk_len > PSK_MAX_PSK_LEN)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ ERR_R_INTERNAL_ERROR);
+ goto psk_err;
+ }
+ else if (psk_len == 0)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ SSL_R_PSK_IDENTITY_NOT_FOUND);
+ goto psk_err;
+ }
+
+ /* create PSK pre_master_secret */
+ pre_ms_len = 2+psk_len+2+psk_len;
+ t = psk_or_pre_ms;
+ memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
+ s2n(psk_len, t);
+ memset(t, 0, psk_len);
+ t+=psk_len;
+ s2n(psk_len, t);
+
+ if (s->session->psk_identity_hint != NULL)
+ OPENSSL_free(s->session->psk_identity_hint);
+ s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
+ if (s->ctx->psk_identity_hint != NULL &&
+ s->session->psk_identity_hint == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto psk_err;
+ }
+
+ if (s->session->psk_identity != NULL)
+ OPENSSL_free(s->session->psk_identity);
+ s->session->psk_identity = BUF_strdup(identity);
+ if (s->session->psk_identity == NULL)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto psk_err;
+ }
+
+ s->session->master_key_length =
+ s->method->ssl3_enc->generate_master_secret(s,
+ s->session->master_key,
+ psk_or_pre_ms, pre_ms_len);
+ n = strlen(identity);
+ s2n(n, p);
+ memcpy(p, identity, n);
+ n+=2;
+ psk_err = 0;
+ psk_err:
+ OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
+ OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
+ if (psk_err != 0)
+ {
+ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
+ goto err;
+ }
+ }
+#endif