524 lines
15 KiB
C
524 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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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_fprintf fprintf
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#define mbedtls_printf printf
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#define mbedtls_snprintf snprintf
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#define mbedtls_exit exit
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif
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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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{
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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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{
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if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
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{
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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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{
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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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if( ret <= 0 )
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{
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switch( ret )
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{
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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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{
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if( ret == MBEDTLS_ERR_NET_CONN_RESET )
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{
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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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{
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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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{
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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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{
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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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{
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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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{
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if( threads[i].active == 0 )
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break;
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if( threads[i].data.thread_complete == 1 )
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{
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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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* 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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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;
|
|
|
|
exit:
|
|
mbedtls_x509_crt_free( &srvcert );
|
|
mbedtls_pk_free( &pkey );
|
|
#if defined(MBEDTLS_SSL_CACHE_C)
|
|
mbedtls_ssl_cache_free( &cache );
|
|
#endif
|
|
mbedtls_ctr_drbg_free( &ctr_drbg );
|
|
mbedtls_entropy_free( &entropy );
|
|
mbedtls_ssl_config_free( &conf );
|
|
|
|
mbedtls_net_free( &listen_fd );
|
|
|
|
mbedtls_mutex_free( &debug_mutex );
|
|
|
|
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
|
|
mbedtls_memory_buffer_alloc_free();
|
|
#endif
|
|
|
|
mbedtls_exit( ret );
|
|
}
|
|
|
|
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
|
|
MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
|
|
MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_THREADING_C &&
|
|
MBEDTLS_THREADING_PTHREAD && MBEDTLS_PEM_PARSE_C */
|