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627 lines
15 KiB
C
627 lines
15 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "ssl_pm.h"
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#include "ssl_port.h"
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#include "ssl_dbg.h"
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/* mbedtls include */
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#include "mbedtls/platform.h"
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#include "mbedtls/net.h"
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#include "mbedtls/debug.h"
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include "mbedtls/error.h"
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#include "mbedtls/certs.h"
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#if 0
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#define DEBUG_LOAD_BUF_STRING(str) SSL_DEBUG(1, "%s\n", str)
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#else
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#define DEBUG_LOAD_BUF_STRING(str)
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#endif
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#define X509_INFO_STRING_LENGTH 1024
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struct ssl_pm
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{
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/* local socket file description */
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mbedtls_net_context fd;
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/* remote client socket file description */
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mbedtls_net_context cl_fd;
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mbedtls_ssl_config conf;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_ssl_context ssl;
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mbedtls_entropy_context entropy;
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};
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struct x509_pm
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{
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mbedtls_x509_crt *x509_crt;
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mbedtls_x509_crt *ex_crt;
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};
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struct pkey_pm
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{
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mbedtls_pk_context *pkey;
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mbedtls_pk_context *ex_pkey;
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};
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unsigned int max_content_len;
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/*********************************************************************************************/
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/************************************ SSL arch interface *************************************/
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/**
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* @brief create SSL low-level object
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*/
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int ssl_pm_new(SSL *ssl)
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{
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struct ssl_pm *ssl_pm;
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int ret;
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const unsigned char pers[] = "OpenSSL PM";
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size_t pers_len = sizeof(pers);
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int endpoint;
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int version;
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const SSL_METHOD *method = ssl->method;
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ssl_pm = ssl_mem_zalloc(sizeof(struct ssl_pm));
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if (!ssl_pm)
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SSL_ERR(ret, failed1, "ssl_mem_zalloc\n");
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max_content_len = ssl->ctx->read_buffer_len;
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mbedtls_net_init(&ssl_pm->fd);
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mbedtls_net_init(&ssl_pm->cl_fd);
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mbedtls_ssl_config_init(&ssl_pm->conf);
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mbedtls_ctr_drbg_init(&ssl_pm->ctr_drbg);
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mbedtls_entropy_init(&ssl_pm->entropy);
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mbedtls_ssl_init(&ssl_pm->ssl);
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ret = mbedtls_ctr_drbg_seed(&ssl_pm->ctr_drbg, mbedtls_entropy_func, &ssl_pm->entropy, pers, pers_len);
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if (ret)
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SSL_ERR(ret, failed2, "mbedtls_ctr_drbg_seed:[-0x%x]\n", -ret);
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if (method->endpoint) {
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endpoint = MBEDTLS_SSL_IS_SERVER;
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} else {
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endpoint = MBEDTLS_SSL_IS_CLIENT;
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}
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ret = mbedtls_ssl_config_defaults(&ssl_pm->conf, endpoint, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT);
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if (ret)
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SSL_ERR(ret, failed2, "mbedtls_ssl_config_defaults:[-0x%x]\n", -ret);
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if (TLS_ANY_VERSION != ssl->version) {
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if (TLS1_2_VERSION == ssl->version)
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version = MBEDTLS_SSL_MINOR_VERSION_3;
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else if (TLS1_1_VERSION == ssl->version)
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version = MBEDTLS_SSL_MINOR_VERSION_2;
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else if (TLS1_VERSION == ssl->version)
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version = MBEDTLS_SSL_MINOR_VERSION_1;
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else
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version = MBEDTLS_SSL_MINOR_VERSION_0;
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mbedtls_ssl_conf_max_version(&ssl_pm->conf, MBEDTLS_SSL_MAJOR_VERSION_3, version);
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mbedtls_ssl_conf_min_version(&ssl_pm->conf, MBEDTLS_SSL_MAJOR_VERSION_3, version);
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}
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mbedtls_ssl_conf_rng(&ssl_pm->conf, mbedtls_ctr_drbg_random, &ssl_pm->ctr_drbg);
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mbedtls_ssl_conf_dbg(&ssl_pm->conf, NULL, NULL);
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ret = mbedtls_ssl_setup(&ssl_pm->ssl, &ssl_pm->conf);
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if (ret)
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SSL_ERR(ret, failed3, "mbedtls_ssl_setup:[-0x%x]\n", -ret);
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mbedtls_ssl_set_bio(&ssl_pm->ssl, &ssl_pm->fd, mbedtls_net_send, mbedtls_net_recv, NULL);
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ssl->ssl_pm = ssl_pm;
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return 0;
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failed3:
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mbedtls_ssl_config_free(&ssl_pm->conf);
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mbedtls_ctr_drbg_free(&ssl_pm->ctr_drbg);
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failed2:
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mbedtls_entropy_free(&ssl_pm->entropy);
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ssl_mem_free(ssl_pm);
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failed1:
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return -1;
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}
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/**
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* @brief free SSL low-level object
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*/
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void ssl_pm_free(SSL *ssl)
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{
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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mbedtls_ctr_drbg_free(&ssl_pm->ctr_drbg);
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mbedtls_entropy_free(&ssl_pm->entropy);
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mbedtls_ssl_config_free(&ssl_pm->conf);
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mbedtls_ssl_free(&ssl_pm->ssl);
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ssl_mem_free(ssl_pm);
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ssl->ssl_pm = NULL;
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}
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/**
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* @brief reload SSL low-level certification object
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*/
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static int ssl_pm_reload_crt(SSL *ssl)
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{
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int ret;
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int mode;
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struct ssl_pm *ssl_pm = ssl->ssl_pm;
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struct x509_pm *ca_pm = (struct x509_pm *)ssl->client_CA->x509_pm;
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struct pkey_pm *pkey_pm = (struct pkey_pm *)ssl->cert->pkey->pkey_pm;
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struct x509_pm *crt_pm = (struct x509_pm *)ssl->cert->x509->x509_pm;
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if (ssl->verify_mode == SSL_VERIFY_PEER)
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mode = MBEDTLS_SSL_VERIFY_REQUIRED;
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else if (ssl->verify_mode == SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
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mode = MBEDTLS_SSL_VERIFY_OPTIONAL;
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else if (ssl->verify_mode == SSL_VERIFY_CLIENT_ONCE)
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mode = MBEDTLS_SSL_VERIFY_UNSET;
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else
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mode = MBEDTLS_SSL_VERIFY_NONE;
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mbedtls_ssl_conf_authmode(&ssl_pm->conf, mode);
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if (ca_pm->x509_crt) {
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mbedtls_ssl_conf_ca_chain(&ssl_pm->conf, ca_pm->x509_crt, NULL);
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} else if (ca_pm->ex_crt) {
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mbedtls_ssl_conf_ca_chain(&ssl_pm->conf, ca_pm->ex_crt, NULL);
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}
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if (crt_pm->x509_crt && pkey_pm->pkey) {
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ret = mbedtls_ssl_conf_own_cert(&ssl_pm->conf, crt_pm->x509_crt, pkey_pm->pkey);
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} else if (crt_pm->ex_crt && pkey_pm->ex_pkey) {
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ret = mbedtls_ssl_conf_own_cert(&ssl_pm->conf, crt_pm->ex_crt, pkey_pm->ex_pkey);
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} else {
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ret = 0;
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}
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if (ret)
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return -1;
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return 0;
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}
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/*
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* Perform the mbedtls SSL handshake instead of mbedtls_ssl_handshake.
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* We can add debug here.
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*/
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static int mbedtls_handshake( mbedtls_ssl_context *ssl )
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{
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int ret = 0;
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if (ssl == NULL || ssl->conf == NULL)
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return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
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while (ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER)
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{
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ret = mbedtls_ssl_handshake_step(ssl);
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SSL_DEBUG(1, "ssl ret %d state %d heap %d\n",
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ret, ssl->state, system_get_free_heap_size());
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if (ret != 0)
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break;
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}
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return ret;
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}
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int ssl_pm_handshake(SSL *ssl)
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{
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int ret, mbed_ret;
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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mbed_ret = ssl_pm_reload_crt(ssl);
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if (mbed_ret)
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return 0;
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SSL_DEBUG(1, "ssl_speed_up_enter ");
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ssl_speed_up_enter();
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SSL_DEBUG(1, "OK\n");
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while((mbed_ret = mbedtls_handshake(&ssl_pm->ssl)) != 0) {
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if (mbed_ret != MBEDTLS_ERR_SSL_WANT_READ && mbed_ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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break;
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}
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}
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SSL_DEBUG(1, "ssl_speed_up_exit ");
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ssl_speed_up_exit();
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SSL_DEBUG(1, "OK\n");
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if (!mbed_ret) {
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struct x509_pm *x509_pm = (struct x509_pm *)ssl->session->peer->x509_pm;
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ret = 1;
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x509_pm->ex_crt = (mbedtls_x509_crt *)mbedtls_ssl_get_peer_cert(&ssl_pm->ssl);
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} else {
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ret = 0;
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SSL_DEBUG(1, "mbedtls_ssl_handshake [-0x%x]\n", -mbed_ret);
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}
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return ret;
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}
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int ssl_pm_shutdown(SSL *ssl)
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{
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int ret, mbed_ret;
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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mbed_ret = mbedtls_ssl_close_notify(&ssl_pm->ssl);
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if (!mbed_ret) {
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struct x509_pm *x509_pm = (struct x509_pm *)ssl->session->peer->x509_pm;
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ret = 0;
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x509_pm->ex_crt = NULL;
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}
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else
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ret = -1;
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return ret;
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}
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int ssl_pm_clear(SSL *ssl)
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{
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return ssl_pm_shutdown(ssl);
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}
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int ssl_pm_read(SSL *ssl, void *buffer, int len)
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{
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int ret, mbed_ret;
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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mbed_ret = mbedtls_ssl_read(&ssl_pm->ssl, buffer, len);
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if (mbed_ret < 0)
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ret = -1;
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else if (mbed_ret == 0)
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ret = 0;
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else
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ret = mbed_ret;
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return ret;
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}
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int ssl_pm_send(SSL *ssl, const void *buffer, int len)
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{
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int ret, mbed_ret;
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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mbed_ret = mbedtls_ssl_write(&ssl_pm->ssl, buffer, len);
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if (mbed_ret < 0)
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ret = -1;
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else if (mbed_ret == 0)
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ret = 0;
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else
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ret = mbed_ret;
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return ret;
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}
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int ssl_pm_pending(const SSL *ssl)
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{
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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return mbedtls_ssl_get_bytes_avail(&ssl_pm->ssl);
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}
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void ssl_pm_set_fd(SSL *ssl, int fd, int mode)
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{
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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ssl_pm->fd.fd = fd;
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}
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int ssl_pm_get_fd(const SSL *ssl, int mode)
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{
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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return ssl_pm->fd.fd;
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}
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OSSL_HANDSHAKE_STATE ssl_pm_get_state(const SSL *ssl)
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{
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OSSL_HANDSHAKE_STATE state;
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struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
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switch (ssl_pm->ssl.state)
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{
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case MBEDTLS_SSL_CLIENT_HELLO:
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state = TLS_ST_CW_CLNT_HELLO;
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break;
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case MBEDTLS_SSL_SERVER_HELLO:
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state = TLS_ST_SW_SRVR_HELLO;
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break;
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case MBEDTLS_SSL_SERVER_CERTIFICATE:
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state = TLS_ST_SW_CERT;
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break;
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case MBEDTLS_SSL_SERVER_HELLO_DONE:
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state = TLS_ST_SW_SRVR_DONE;
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break;
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case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
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state = TLS_ST_CW_KEY_EXCH;
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break;
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case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
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state = TLS_ST_CW_CHANGE;
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break;
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case MBEDTLS_SSL_CLIENT_FINISHED:
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state = TLS_ST_CW_FINISHED;
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break;
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case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
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state = TLS_ST_SW_CHANGE;
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break;
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case MBEDTLS_SSL_SERVER_FINISHED:
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state = TLS_ST_SW_FINISHED;
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break;
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case MBEDTLS_SSL_CLIENT_CERTIFICATE:
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state = TLS_ST_CW_CERT;
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break;
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case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
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state = TLS_ST_SR_KEY_EXCH;
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break;
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case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
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state = TLS_ST_SW_SESSION_TICKET;
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break;
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case MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT:
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state = TLS_ST_SW_CERT_REQ;
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break;
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case MBEDTLS_SSL_HANDSHAKE_OVER:
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state = TLS_ST_OK;
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break;
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default :
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state = TLS_ST_BEFORE;
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break;
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}
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return state;
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}
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int x509_pm_show_info(X509 *x)
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{
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int ret;
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char *buf;
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mbedtls_x509_crt *x509_crt;
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struct x509_pm *x509_pm = x->x509_pm;
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if (x509_pm->x509_crt)
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x509_crt = x509_pm->x509_crt;
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else if (x509_pm->ex_crt)
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x509_crt = x509_pm->ex_crt;
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else
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x509_crt = NULL;
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if (!x509_crt)
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return -1;
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buf = ssl_mem_malloc(X509_INFO_STRING_LENGTH);
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if (!buf)
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SSL_RET(failed1, "");
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ret = mbedtls_x509_crt_info(buf, X509_INFO_STRING_LENGTH - 1, "", x509_crt);
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if (ret <= 0)
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SSL_RET(failed2, "");
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buf[ret] = 0;
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ssl_mem_free(buf);
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SSL_DEBUG(1, "%s", buf);
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return 0;
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failed2:
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ssl_mem_free(buf);
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failed1:
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return -1;
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}
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int x509_pm_new(X509 *x, X509 *m_x)
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{
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struct x509_pm *x509_pm;
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x509_pm = ssl_mem_zalloc(sizeof(struct x509_pm));
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if (!x509_pm)
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SSL_RET(failed1, "ssl_mem_zalloc\n");
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x->x509_pm = x509_pm;
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if (m_x) {
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struct x509_pm *m_x509_pm = (struct x509_pm *)m_x->x509_pm;
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x509_pm->ex_crt = m_x509_pm->x509_crt;
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}
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return 0;
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failed1:
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return -1;
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}
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void x509_pm_free(X509 *x)
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{
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struct x509_pm *x509_pm = (struct x509_pm *)x->x509_pm;
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if (x509_pm->x509_crt) {
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mbedtls_x509_crt_free(x509_pm->x509_crt);
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ssl_mem_free(x509_pm->x509_crt);
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x509_pm->x509_crt = NULL;
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}
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ssl_mem_free(x->x509_pm);
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x->x509_pm = NULL;
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}
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int x509_pm_load(X509 *x, const unsigned char *buffer, int len)
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{
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int ret;
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unsigned char *load_buf;
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struct x509_pm *x509_pm = (struct x509_pm *)x->x509_pm;
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if (x509_pm->x509_crt)
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mbedtls_x509_crt_free(x509_pm->x509_crt);
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if (!x509_pm->x509_crt) {
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x509_pm->x509_crt = ssl_mem_malloc(sizeof(mbedtls_x509_crt));
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if (!x509_pm->x509_crt)
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SSL_RET(failed1, "ssl_mem_malloc\n");
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}
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load_buf = ssl_mem_malloc(len + 1);
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if (!load_buf)
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SSL_RET(failed2, "ssl_mem_malloc\n");
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ssl_memcpy(load_buf, buffer, len);
|
|
load_buf[len] = '\0';
|
|
|
|
DEBUG_LOAD_BUF_STRING(load_buf);
|
|
|
|
mbedtls_x509_crt_init(x509_pm->x509_crt);
|
|
|
|
ret = mbedtls_x509_crt_parse(x509_pm->x509_crt, load_buf, len + 1);
|
|
ssl_mem_free(load_buf);
|
|
|
|
if (ret)
|
|
SSL_RET(failed2, "mbedtls_x509_crt_parse, return [-0x%x]\n", -ret);
|
|
|
|
return 0;
|
|
|
|
failed2:
|
|
mbedtls_x509_crt_free(x509_pm->x509_crt);
|
|
ssl_mem_free(x509_pm->x509_crt);
|
|
x509_pm->x509_crt = NULL;
|
|
failed1:
|
|
return -1;
|
|
}
|
|
|
|
int pkey_pm_new(EVP_PKEY *pk, EVP_PKEY *m_pkey)
|
|
{
|
|
struct pkey_pm *pkey_pm;
|
|
|
|
pkey_pm = ssl_mem_zalloc(sizeof(struct pkey_pm));
|
|
if (!pkey_pm)
|
|
return -1;
|
|
|
|
pk->pkey_pm = pkey_pm;
|
|
|
|
if (m_pkey) {
|
|
struct pkey_pm *m_pkey_pm = (struct pkey_pm *)m_pkey->pkey_pm;
|
|
|
|
pkey_pm->ex_pkey = m_pkey_pm->pkey;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pkey_pm_free(EVP_PKEY *pk)
|
|
{
|
|
struct pkey_pm *pkey_pm = (struct pkey_pm *)pk->pkey_pm;
|
|
|
|
if (pkey_pm->pkey) {
|
|
mbedtls_pk_free(pkey_pm->pkey);
|
|
|
|
ssl_mem_free(pkey_pm->pkey);
|
|
pkey_pm->pkey = NULL;
|
|
}
|
|
|
|
ssl_mem_free(pk->pkey_pm);
|
|
pk->pkey_pm = NULL;
|
|
}
|
|
|
|
int pkey_pm_load(EVP_PKEY *pk, const unsigned char *buffer, int len)
|
|
{
|
|
int ret;
|
|
unsigned char *load_buf;
|
|
struct pkey_pm *pkey_pm = (struct pkey_pm *)pk->pkey_pm;
|
|
|
|
if (pkey_pm->pkey)
|
|
mbedtls_pk_free(pkey_pm->pkey);
|
|
|
|
if (!pkey_pm->pkey) {
|
|
pkey_pm->pkey = ssl_mem_malloc(sizeof(mbedtls_pk_context));
|
|
if (!pkey_pm->pkey)
|
|
SSL_RET(failed1, "ssl_mem_malloc\n");
|
|
}
|
|
|
|
load_buf = ssl_mem_malloc(len + 1);
|
|
if (!load_buf)
|
|
SSL_RET(failed2, "ssl_mem_malloc\n");
|
|
|
|
ssl_memcpy(load_buf, buffer, len);
|
|
load_buf[len] = '\0';
|
|
|
|
DEBUG_LOAD_BUF_STRING(load_buf);
|
|
|
|
mbedtls_pk_init(pkey_pm->pkey);
|
|
|
|
ret = mbedtls_pk_parse_key(pkey_pm->pkey, load_buf, len + 1, NULL, 0);
|
|
ssl_mem_free(load_buf);
|
|
|
|
if (ret)
|
|
SSL_RET(failed2, "mbedtls_pk_parse_key, return [-0x%x]\n", -ret);
|
|
|
|
return 0;
|
|
|
|
failed2:
|
|
mbedtls_pk_free(pkey_pm->pkey);
|
|
ssl_mem_free(pkey_pm->pkey);
|
|
pkey_pm->pkey = NULL;
|
|
failed1:
|
|
return -1;
|
|
}
|
|
|
|
|
|
|
|
void ssl_pm_set_bufflen(SSL *ssl, int len)
|
|
{
|
|
max_content_len = len;
|
|
}
|
|
|
|
long ssl_pm_get_verify_result(const SSL *ssl)
|
|
{
|
|
long ret;
|
|
long verify_result;
|
|
struct ssl_pm *ssl_pm = (struct ssl_pm *)ssl->ssl_pm;
|
|
|
|
ret = mbedtls_ssl_get_verify_result(&ssl_pm->ssl);
|
|
|
|
if (!ret)
|
|
verify_result = X509_V_OK;
|
|
else
|
|
verify_result = X509_V_ERR_UNSPECIFIED;
|
|
|
|
return verify_result;
|
|
}
|