491 lines
15 KiB
C
491 lines
15 KiB
C
/*
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* SSL server demonstration program using pthread for handling multiple
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* clients.
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* 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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*
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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, WITHOUT
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* 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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*/
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#include "mbedtls/build_info.h"
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#include "mbedtls/platform.h"
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#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
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!defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_SRV_C) || \
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!defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \
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!defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
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!defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_THREADING_C) || \
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!defined(MBEDTLS_THREADING_PTHREAD) || !defined(MBEDTLS_PEM_PARSE_C)
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int main(void)
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{
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C "
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"and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
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"MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
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"MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C and/or "
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"MBEDTLS_THREADING_C and/or MBEDTLS_THREADING_PTHREAD "
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"and/or MBEDTLS_PEM_PARSE_C not defined.\n");
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mbedtls_exit(0);
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}
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#else
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#include <stdlib.h>
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#include <string.h>
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#if defined(_WIN32)
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#include <windows.h>
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#endif
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include "mbedtls/x509.h"
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#include "mbedtls/ssl.h"
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#include "mbedtls/net_sockets.h"
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#include "mbedtls/error.h"
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#include "test/certs.h"
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#if defined(MBEDTLS_SSL_CACHE_C)
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#include "mbedtls/ssl_cache.h"
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#endif
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#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
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#include "mbedtls/memory_buffer_alloc.h"
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#endif
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#define HTTP_RESPONSE \
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"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
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"<h2>mbed TLS Test Server</h2>\r\n" \
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"<p>Successful connection using: %s</p>\r\n"
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#define DEBUG_LEVEL 0
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#define MAX_NUM_THREADS 5
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mbedtls_threading_mutex_t debug_mutex;
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static void my_mutexed_debug(void *ctx, int level,
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const char *file, int line,
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const char *str)
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{
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long int thread_id = (long int) pthread_self();
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mbedtls_mutex_lock(&debug_mutex);
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((void) level);
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mbedtls_fprintf((FILE *) ctx, "%s:%04d: [ #%ld ] %s",
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file, line, thread_id, str);
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fflush((FILE *) ctx);
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mbedtls_mutex_unlock(&debug_mutex);
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}
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typedef struct {
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mbedtls_net_context client_fd;
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int thread_complete;
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const mbedtls_ssl_config *config;
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} thread_info_t;
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typedef struct {
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int active;
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thread_info_t data;
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pthread_t thread;
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} pthread_info_t;
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static thread_info_t base_info;
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static pthread_info_t threads[MAX_NUM_THREADS];
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static void *handle_ssl_connection(void *data)
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{
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int ret, len;
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thread_info_t *thread_info = (thread_info_t *) data;
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mbedtls_net_context *client_fd = &thread_info->client_fd;
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long int thread_id = (long int) pthread_self();
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unsigned char buf[1024];
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mbedtls_ssl_context ssl;
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/* Make sure memory references are valid */
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mbedtls_ssl_init(&ssl);
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mbedtls_printf(" [ #%ld ] Setting up SSL/TLS data\n", thread_id);
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/*
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* 4. Get the SSL context ready
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*/
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if ((ret = mbedtls_ssl_setup(&ssl, thread_info->config)) != 0) {
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mbedtls_printf(" [ #%ld ] failed: mbedtls_ssl_setup returned -0x%04x\n",
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thread_id, (unsigned int) -ret);
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goto thread_exit;
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}
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mbedtls_ssl_set_bio(&ssl, client_fd, mbedtls_net_send, mbedtls_net_recv, NULL);
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/*
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* 5. Handshake
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*/
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mbedtls_printf(" [ #%ld ] Performing the SSL/TLS handshake\n", thread_id);
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while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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mbedtls_printf(" [ #%ld ] failed: mbedtls_ssl_handshake returned -0x%04x\n",
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thread_id, (unsigned int) -ret);
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goto thread_exit;
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}
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}
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mbedtls_printf(" [ #%ld ] ok\n", thread_id);
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/*
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* 6. Read the HTTP Request
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*/
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mbedtls_printf(" [ #%ld ] < Read from client\n", thread_id);
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do {
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len = sizeof(buf) - 1;
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memset(buf, 0, sizeof(buf));
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ret = mbedtls_ssl_read(&ssl, buf, len);
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if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
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continue;
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}
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if (ret <= 0) {
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switch (ret) {
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case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
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mbedtls_printf(" [ #%ld ] connection was closed gracefully\n",
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thread_id);
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goto thread_exit;
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case MBEDTLS_ERR_NET_CONN_RESET:
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mbedtls_printf(" [ #%ld ] connection was reset by peer\n",
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thread_id);
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goto thread_exit;
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default:
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mbedtls_printf(" [ #%ld ] mbedtls_ssl_read returned -0x%04x\n",
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thread_id, (unsigned int) -ret);
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goto thread_exit;
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}
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}
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len = ret;
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mbedtls_printf(" [ #%ld ] %d bytes read\n=====\n%s\n=====\n",
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thread_id, len, (char *) buf);
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if (ret > 0) {
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break;
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}
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} while (1);
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/*
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* 7. Write the 200 Response
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*/
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mbedtls_printf(" [ #%ld ] > Write to client:\n", thread_id);
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len = sprintf((char *) buf, HTTP_RESPONSE,
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mbedtls_ssl_get_ciphersuite(&ssl));
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while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) {
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if (ret == MBEDTLS_ERR_NET_CONN_RESET) {
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mbedtls_printf(" [ #%ld ] failed: peer closed the connection\n",
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thread_id);
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goto thread_exit;
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}
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if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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mbedtls_printf(" [ #%ld ] failed: mbedtls_ssl_write returned -0x%04x\n",
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thread_id, (unsigned int) ret);
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goto thread_exit;
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}
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}
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len = ret;
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mbedtls_printf(" [ #%ld ] %d bytes written\n=====\n%s\n=====\n",
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thread_id, len, (char *) buf);
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mbedtls_printf(" [ #%ld ] . Closing the connection...", thread_id);
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while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {
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if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
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ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
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mbedtls_printf(" [ #%ld ] failed: mbedtls_ssl_close_notify returned -0x%04x\n",
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thread_id, (unsigned int) ret);
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goto thread_exit;
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}
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}
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mbedtls_printf(" ok\n");
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ret = 0;
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thread_exit:
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#ifdef MBEDTLS_ERROR_C
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if (ret != 0) {
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char error_buf[100];
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mbedtls_strerror(ret, error_buf, 100);
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mbedtls_printf(" [ #%ld ] Last error was: -0x%04x - %s\n\n",
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thread_id, (unsigned int) -ret, error_buf);
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}
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#endif
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mbedtls_net_free(client_fd);
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mbedtls_ssl_free(&ssl);
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thread_info->thread_complete = 1;
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return NULL;
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}
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static int thread_create(mbedtls_net_context *client_fd)
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{
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int ret, i;
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/*
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* Find in-active or finished thread slot
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*/
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for (i = 0; i < MAX_NUM_THREADS; i++) {
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if (threads[i].active == 0) {
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break;
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}
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if (threads[i].data.thread_complete == 1) {
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mbedtls_printf(" [ main ] Cleaning up thread %d\n", i);
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pthread_join(threads[i].thread, NULL);
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memset(&threads[i], 0, sizeof(pthread_info_t));
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break;
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}
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}
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if (i == MAX_NUM_THREADS) {
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return -1;
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}
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/*
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* Fill thread-info for thread
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*/
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memcpy(&threads[i].data, &base_info, sizeof(base_info));
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threads[i].active = 1;
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memcpy(&threads[i].data.client_fd, client_fd, sizeof(mbedtls_net_context));
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if ((ret = pthread_create(&threads[i].thread, NULL, handle_ssl_connection,
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&threads[i].data)) != 0) {
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return ret;
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}
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return 0;
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}
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int main(void)
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{
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int ret;
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mbedtls_net_context listen_fd, client_fd;
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const char pers[] = "ssl_pthread_server";
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_ssl_config conf;
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mbedtls_x509_crt srvcert;
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mbedtls_x509_crt cachain;
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mbedtls_pk_context pkey;
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#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
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unsigned char alloc_buf[100000];
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#endif
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#if defined(MBEDTLS_SSL_CACHE_C)
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mbedtls_ssl_cache_context cache;
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#endif
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#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
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mbedtls_memory_buffer_alloc_init(alloc_buf, sizeof(alloc_buf));
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#endif
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#if defined(MBEDTLS_SSL_CACHE_C)
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mbedtls_ssl_cache_init(&cache);
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#endif
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mbedtls_x509_crt_init(&srvcert);
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mbedtls_x509_crt_init(&cachain);
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mbedtls_ssl_config_init(&conf);
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mbedtls_ctr_drbg_init(&ctr_drbg);
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memset(threads, 0, sizeof(threads));
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mbedtls_net_init(&listen_fd);
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mbedtls_net_init(&client_fd);
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mbedtls_mutex_init(&debug_mutex);
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base_info.config = &conf;
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/*
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* We use only a single entropy source that is used in all the threads.
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*/
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mbedtls_entropy_init(&entropy);
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/*
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* 1a. Seed the random number generator
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*/
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mbedtls_printf(" . Seeding the random number generator...");
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if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen(pers))) != 0) {
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mbedtls_printf(" failed: mbedtls_ctr_drbg_seed returned -0x%04x\n",
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(unsigned int) -ret);
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goto exit;
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}
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mbedtls_printf(" ok\n");
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/*
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* 1b. Load the certificates and private RSA key
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*/
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mbedtls_printf("\n . Loading the server cert. and key...");
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fflush(stdout);
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/*
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* This demonstration program uses embedded test certificates.
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* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
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* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
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*/
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ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,
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mbedtls_test_srv_crt_len);
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if (ret != 0) {
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mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
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goto exit;
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}
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ret = mbedtls_x509_crt_parse(&cachain, (const unsigned char *) mbedtls_test_cas_pem,
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mbedtls_test_cas_pem_len);
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if (ret != 0) {
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mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret);
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goto exit;
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}
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mbedtls_pk_init(&pkey);
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ret = mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key,
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mbedtls_test_srv_key_len, NULL, 0,
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mbedtls_ctr_drbg_random, &ctr_drbg);
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if (ret != 0) {
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mbedtls_printf(" failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret);
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goto exit;
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}
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mbedtls_printf(" ok\n");
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/*
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* 1c. Prepare SSL configuration
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*/
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mbedtls_printf(" . Setting up the SSL data....");
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if ((ret = mbedtls_ssl_config_defaults(&conf,
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MBEDTLS_SSL_IS_SERVER,
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MBEDTLS_SSL_TRANSPORT_STREAM,
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MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
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mbedtls_printf(" failed: mbedtls_ssl_config_defaults returned -0x%04x\n",
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(unsigned int) -ret);
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goto exit;
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}
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mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
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mbedtls_ssl_conf_dbg(&conf, my_mutexed_debug, stdout);
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/* mbedtls_ssl_cache_get() and mbedtls_ssl_cache_set() are thread-safe if
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* MBEDTLS_THREADING_C is set.
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*/
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#if defined(MBEDTLS_SSL_CACHE_C)
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mbedtls_ssl_conf_session_cache(&conf, &cache,
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mbedtls_ssl_cache_get,
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mbedtls_ssl_cache_set);
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#endif
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mbedtls_ssl_conf_ca_chain(&conf, &cachain, NULL);
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if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
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goto exit;
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}
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mbedtls_printf(" ok\n");
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/*
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* 2. Setup the listening TCP socket
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*/
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mbedtls_printf(" . Bind on https://localhost:4433/ ...");
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fflush(stdout);
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if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_net_bind returned %d\n\n", ret);
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goto exit;
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}
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mbedtls_printf(" ok\n");
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reset:
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#ifdef MBEDTLS_ERROR_C
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if (ret != 0) {
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char error_buf[100];
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mbedtls_strerror(ret, error_buf, 100);
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mbedtls_printf(" [ main ] Last error was: -0x%04x - %s\n", (unsigned int) -ret,
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error_buf);
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}
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#endif
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/*
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* 3. Wait until a client connects
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*/
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mbedtls_printf(" [ main ] Waiting for a remote connection\n");
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if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
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NULL, 0, NULL)) != 0) {
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mbedtls_printf(" [ main ] failed: mbedtls_net_accept returned -0x%04x\n",
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(unsigned int) ret);
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goto exit;
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}
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mbedtls_printf(" [ main ] ok\n");
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mbedtls_printf(" [ main ] Creating a new thread\n");
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if ((ret = thread_create(&client_fd)) != 0) {
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mbedtls_printf(" [ main ] failed: thread_create returned %d\n", ret);
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mbedtls_net_free(&client_fd);
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goto reset;
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}
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ret = 0;
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goto reset;
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exit:
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mbedtls_x509_crt_free(&srvcert);
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mbedtls_pk_free(&pkey);
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#if defined(MBEDTLS_SSL_CACHE_C)
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mbedtls_ssl_cache_free(&cache);
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#endif
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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mbedtls_ssl_config_free(&conf);
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mbedtls_net_free(&listen_fd);
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mbedtls_mutex_free(&debug_mutex);
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#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
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mbedtls_memory_buffer_alloc_free();
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#endif
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mbedtls_exit(ret);
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}
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#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
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MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
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MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_THREADING_C &&
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MBEDTLS_THREADING_PTHREAD && MBEDTLS_PEM_PARSE_C */
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