kopia lustrzana https://github.com/espressif/esp-idf
203 wiersze
6.0 KiB
C
203 wiersze
6.0 KiB
C
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// Copyright 2020 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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#include <sys/param.h>
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#include <stdbool.h>
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#include "esp_mbedtls_dynamic_impl.h"
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int __real_mbedtls_ssl_handshake_client_step(mbedtls_ssl_context *ssl);
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int __wrap_mbedtls_ssl_handshake_client_step(mbedtls_ssl_context *ssl);
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static const char *TAG = "SSL client";
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static int manage_resource(mbedtls_ssl_context *ssl, bool add)
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{
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int state = add ? ssl->state : ssl->state - 1;
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if (ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL) {
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return 0;
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}
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if (!add) {
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if (!ssl->out_left) {
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CHECK_OK(esp_mbedtls_free_tx_buffer(ssl));
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}
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}
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switch (state) {
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case MBEDTLS_SSL_HELLO_REQUEST:
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break;
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case MBEDTLS_SSL_CLIENT_HELLO:
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if (add) {
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size_t buffer_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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}
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break;
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case MBEDTLS_SSL_SERVER_HELLO:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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break;
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case MBEDTLS_SSL_SERVER_CERTIFICATE:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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#ifdef CONFIG_MBEDTLS_DYNAMIC_FREE_CONFIG_DATA
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esp_mbedtls_free_cacert(ssl);
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#endif
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}
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break;
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case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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if (!ssl->keep_current_message) {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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#ifdef CONFIG_MBEDTLS_DYNAMIC_FREE_PEER_CERT
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esp_mbedtls_free_peer_cert(ssl);
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#endif
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}
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break;
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case MBEDTLS_SSL_CERTIFICATE_REQUEST:
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if (add) {
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if (!ssl->keep_current_message) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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}
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} else {
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if (!ssl->keep_current_message) {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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}
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break;
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case MBEDTLS_SSL_SERVER_HELLO_DONE:
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if (add) {
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if (!ssl->keep_current_message) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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}
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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break;
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case MBEDTLS_SSL_CLIENT_CERTIFICATE:
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if (add) {
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size_t buffer_len = 3;
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mbedtls_ssl_key_cert *key_cert = ssl->conf->key_cert;
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while (key_cert && key_cert->cert) {
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size_t num;
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buffer_len += esp_mbedtls_get_crt_size(key_cert->cert, &num);
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buffer_len += num * 3;
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key_cert = key_cert->next;
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}
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buffer_len = MAX(buffer_len, MBEDTLS_SSL_OUT_BUFFER_LEN);
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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}
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break;
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case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
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if (add) {
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size_t buffer_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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}
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break;
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case MBEDTLS_SSL_CERTIFICATE_VERIFY:
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if (add) {
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size_t buffer_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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} else {
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#ifdef CONFIG_MBEDTLS_DYNAMIC_FREE_CONFIG_DATA
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esp_mbedtls_free_dhm(ssl);
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esp_mbedtls_free_keycert_key(ssl);
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esp_mbedtls_free_keycert(ssl);
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#endif
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}
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break;
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case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
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if (add) {
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size_t buffer_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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}
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break;
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case MBEDTLS_SSL_CLIENT_FINISHED:
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if (add) {
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size_t buffer_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
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CHECK_OK(esp_mbedtls_add_tx_buffer(ssl, buffer_len));
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}
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break;
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#if defined(MBEDTLS_SSL_SESSION_TICKETS)
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case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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break;
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#endif
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case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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break;
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case MBEDTLS_SSL_SERVER_FINISHED:
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if (add) {
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CHECK_OK(esp_mbedtls_add_rx_buffer(ssl));
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} else {
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CHECK_OK(esp_mbedtls_free_rx_buffer(ssl));
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}
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break;
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case MBEDTLS_SSL_FLUSH_BUFFERS:
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break;
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case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
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break;
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default:
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break;
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}
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return 0;
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}
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int __wrap_mbedtls_ssl_handshake_client_step(mbedtls_ssl_context *ssl)
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{
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CHECK_OK(manage_resource(ssl, true));
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CHECK_OK(__real_mbedtls_ssl_handshake_client_step(ssl));
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CHECK_OK(manage_resource(ssl, false));
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return 0;
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}
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