+ OPENSSL_cleanse(p,i);
+ }
+ else
+#endif
+#ifndef OPENSSL_NO_KRB5
+ if (l & SSL_kKRB5)
+ {
+ krb5_error_code krb5rc;
+ krb5_data enc_ticket;
+ krb5_data authenticator;
+ krb5_data enc_pms;
+ KSSL_CTX *kssl_ctx = s->kssl_ctx;
+ EVP_CIPHER_CTX ciph_ctx;
+ EVP_CIPHER *enc = NULL;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+ unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
+ + EVP_MAX_BLOCK_LENGTH];
+ int padl, outl;
+ krb5_timestamp authtime = 0;
+ krb5_ticket_times ttimes;
+
+ EVP_CIPHER_CTX_init(&ciph_ctx);
+
+ if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
+
+ n2s(p,i);
+ enc_ticket.length = i;
+ enc_ticket.data = (char *)p;
+ p+=enc_ticket.length;
+
+ n2s(p,i);
+ authenticator.length = i;
+ authenticator.data = (char *)p;
+ p+=authenticator.length;
+
+ n2s(p,i);
+ enc_pms.length = i;
+ enc_pms.data = (char *)p;
+ p+=enc_pms.length;
+
+ /* Note that the length is checked again below,
+ ** after decryption
+ */
+ if(enc_pms.length > sizeof pms)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DATA_LENGTH_TOO_LONG);
+ goto err;
+ }
+
+ if (n != enc_ticket.length + authenticator.length +
+ enc_pms.length + 6)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DATA_LENGTH_TOO_LONG);
+ goto err;
+ }
+
+ if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
+ &kssl_err)) != 0)
+ {
+#ifdef KSSL_DEBUG
+ printf("kssl_sget_tkt rtn %d [%d]\n",
+ krb5rc, kssl_err.reason);
+ if (kssl_err.text)
+ printf("kssl_err text= %s\n", kssl_err.text);
+#endif /* KSSL_DEBUG */
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ kssl_err.reason);
+ goto err;
+ }
+
+ /* Note: no authenticator is not considered an error,
+ ** but will return authtime == 0.
+ */
+ if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
+ &authtime, &kssl_err)) != 0)
+ {
+#ifdef KSSL_DEBUG
+ printf("kssl_check_authent rtn %d [%d]\n",
+ krb5rc, kssl_err.reason);
+ if (kssl_err.text)
+ printf("kssl_err text= %s\n", kssl_err.text);
+#endif /* KSSL_DEBUG */
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
+ kssl_err.reason);
+ goto err;
+ }
+
+ if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
+ {
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, krb5rc);
+ goto err;
+ }
+
+#ifdef KSSL_DEBUG
+ kssl_ctx_show(kssl_ctx);
+#endif /* KSSL_DEBUG */
+
+ enc = kssl_map_enc(kssl_ctx->enctype);
+ if (enc == NULL)
+ goto err;
+
+ memset(iv, 0, sizeof iv); /* per RFC 1510 */
+
+ if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DECRYPTION_FAILED);
+ goto err;
+ }
+ if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
+ (unsigned char *)enc_pms.data, enc_pms.length))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DECRYPTION_FAILED);
+ goto err;
+ }
+ if (outl > SSL_MAX_MASTER_KEY_LENGTH)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DATA_LENGTH_TOO_LONG);
+ goto err;
+ }
+ if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DECRYPTION_FAILED);
+ goto err;
+ }
+ outl += padl;
+ if (outl > SSL_MAX_MASTER_KEY_LENGTH)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_DATA_LENGTH_TOO_LONG);
+ goto err;
+ }
+ EVP_CIPHER_CTX_cleanup(&ciph_ctx);
+
+ s->session->master_key_length=
+ s->method->ssl3_enc->generate_master_secret(s,
+ s->session->master_key, pms, outl);
+
+ if (kssl_ctx->client_princ)
+ {
+ int len = strlen(kssl_ctx->client_princ);
+ if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
+ {
+ s->session->krb5_client_princ_len = len;
+ memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
+ }
+ }
+
+
+ /* Was doing kssl_ctx_free() here,
+ ** but it caused problems for apache.
+ ** kssl_ctx = kssl_ctx_free(kssl_ctx);
+ ** if (s->kssl_ctx) s->kssl_ctx = NULL;
+ */
+ }
+ else
+#endif /* OPENSSL_NO_KRB5 */
+
+#ifndef OPENSSL_NO_ECDH
+ if ((l & SSL_kECDH) || (l & SSL_kECDHE))
+ {
+ int ret = 1;
+
+ /* initialize structures for server's ECDH key pair */
+ if ((srvr_ecdh = EC_KEY_new()) == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Let's get server private key and group information */
+ if (l & SSL_kECDH)
+ {
+ /* use the certificate */
+ srvr_ecdh->group = s->cert->key->privatekey-> \
+ pkey.eckey->group;
+ srvr_ecdh->priv_key = s->cert->key->privatekey-> \
+ pkey.eckey->priv_key;
+ }
+ else
+ {
+ /* use the ephermeral values we saved when
+ * generating the ServerKeyExchange msg.
+ */
+ srvr_ecdh->group = s->s3->tmp.ecdh->group;
+ srvr_ecdh->priv_key = s->s3->tmp.ecdh->priv_key;
+ }
+
+ /* Let's get client's public key */
+ if ((clnt_ecpoint = EC_POINT_new(srvr_ecdh->group))
+ == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (n == 0L)
+ {
+ /* Client Publickey was in Client Certificate */
+
+ if (l & SSL_kECDHE)
+ {
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
+ goto f_err;
+ }
+ if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
+ == NULL) ||
+ (clnt_pub_pkey->type != EVP_PKEY_EC))
+ {
+ /* XXX: For now, we do not support client
+ * authentication using ECDH certificates
+ * so this branch (n == 0L) of the code is
+ * never executed. When that support is
+ * added, we ought to ensure the key
+ * received in the certificate is
+ * authorized for key agreement.
+ * ECDH_compute_key implicitly checks that
+ * the two ECDH shares are for the same
+ * group.
+ */
+ al=SSL_AD_HANDSHAKE_FAILURE;
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
+ goto f_err;
+ }
+
+ EC_POINT_copy(clnt_ecpoint,
+ clnt_pub_pkey->pkey.eckey->pub_key);
+ ret = 2; /* Skip certificate verify processing */
+ }
+ else
+ {
+ /* Get client's public key from encoded point
+ * in the ClientKeyExchange message.
+ */
+ if ((bn_ctx = BN_CTX_new()) == NULL)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Get encoded point length */
+ i = *p;
+ p += 1;
+ if (EC_POINT_oct2point(srvr_ecdh->group,
+ clnt_ecpoint, p, i, bn_ctx) == 0)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ ERR_R_EC_LIB);
+ goto err;
+ }
+ /* p is pointing to somewhere in the buffer
+ * currently, so set it to the start
+ */
+ p=(unsigned char *)s->init_buf->data;
+ }
+
+ /* Compute the shared pre-master secret */
+ i = ECDH_compute_key(p, clnt_ecpoint, srvr_ecdh);
+ if (i <= 0)
+ {
+ SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
+ ERR_R_ECDH_LIB);
+ goto err;
+ }
+
+ EVP_PKEY_free(clnt_pub_pkey);
+ EC_POINT_free(clnt_ecpoint);
+ if (srvr_ecdh != NULL)
+ {
+ srvr_ecdh->priv_key = NULL;
+ srvr_ecdh->group = NULL;
+ EC_KEY_free(srvr_ecdh);
+ }
+ BN_CTX_free(bn_ctx);
+
+ /* Compute the master secret */
+ s->session->master_key_length = s->method->ssl3_enc-> \
+ generate_master_secret(s, s->session->master_key, p, i);
+
+ OPENSSL_cleanse(p, i);
+ return (ret);