1 /*
2 * SSL server demonstration program using pthread for handling multiple
3 * clients.
4 *
5 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
6 * SPDX-License-Identifier: Apache-2.0
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License"); you may
9 * not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
16 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 *
20 * This file is part of mbed TLS (https://tls.mbed.org)
21 */
22
23 #if !defined(MBEDTLS_CONFIG_FILE)
24 #include "mbedtls/config.h"
25 #else
26 #include MBEDTLS_CONFIG_FILE
27 #endif
28
29 #if defined(MBEDTLS_PLATFORM_C)
30 #include "mbedtls/platform.h"
31 #else
32 #include <stdio.h>
33 #define mbedtls_fprintf fprintf
34 #define mbedtls_printf printf
35 #define mbedtls_snprintf snprintf
36 #endif
37
38 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_CERTS_C) || \
39 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
40 !defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_NET_C) || \
41 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
42 !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
43 !defined(MBEDTLS_THREADING_C) || !defined(MBEDTLS_THREADING_PTHREAD) || \
44 !defined(MBEDTLS_PEM_PARSE_C)
main(void)45 int main( void )
46 {
47 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_CERTS_C and/or MBEDTLS_ENTROPY_C "
48 "and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
49 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
50 "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C and/or "
51 "MBEDTLS_THREADING_C and/or MBEDTLS_THREADING_PTHREAD "
52 "and/or MBEDTLS_PEM_PARSE_C not defined.\n");
53 return( 0 );
54 }
55 #else
56
57 #include <stdlib.h>
58 #include <string.h>
59
60 #if defined(_WIN32)
61 #include <windows.h>
62 #endif
63
64 #include "mbedtls/entropy.h"
65 #include "mbedtls/ctr_drbg.h"
66 #include "mbedtls/certs.h"
67 #include "mbedtls/x509.h"
68 #include "mbedtls/ssl.h"
69 #include "mbedtls/net_sockets.h"
70 #include "mbedtls/error.h"
71
72 #if defined(MBEDTLS_SSL_CACHE_C)
73 #include "mbedtls/ssl_cache.h"
74 #endif
75
76 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
77 #include "mbedtls/memory_buffer_alloc.h"
78 #endif
79
80 #define HTTP_RESPONSE \
81 "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
82 "<h2>mbed TLS Test Server</h2>\r\n" \
83 "<p>Successful connection using: %s</p>\r\n"
84
85 #define DEBUG_LEVEL 0
86
87 #define MAX_NUM_THREADS 5
88
89 mbedtls_threading_mutex_t debug_mutex;
90
my_mutexed_debug(void * ctx,int level,const char * file,int line,const char * str)91 static void my_mutexed_debug( void *ctx, int level,
92 const char *file, int line,
93 const char *str )
94 {
95 long int thread_id = (long int) pthread_self();
96
97 mbedtls_mutex_lock( &debug_mutex );
98
99 ((void) level);
100 mbedtls_fprintf( (FILE *) ctx, "%s:%04d: [ #%ld ] %s",
101 file, line, thread_id, str );
102 fflush( (FILE *) ctx );
103
104 mbedtls_mutex_unlock( &debug_mutex );
105 }
106
107 typedef struct {
108 mbedtls_net_context client_fd;
109 int thread_complete;
110 const mbedtls_ssl_config *config;
111 } thread_info_t;
112
113 typedef struct {
114 int active;
115 thread_info_t data;
116 pthread_t thread;
117 } pthread_info_t;
118
119 static thread_info_t base_info;
120 static pthread_info_t threads[MAX_NUM_THREADS];
121
handle_ssl_connection(void * data)122 static void *handle_ssl_connection( void *data )
123 {
124 int ret, len;
125 thread_info_t *thread_info = (thread_info_t *) data;
126 mbedtls_net_context *client_fd = &thread_info->client_fd;
127 long int thread_id = (long int) pthread_self();
128 unsigned char buf[1024];
129 mbedtls_ssl_context ssl;
130
131 /* Make sure memory references are valid */
132 mbedtls_ssl_init( &ssl );
133
134 mbedtls_printf( " [ #%ld ] Setting up SSL/TLS data\n", thread_id );
135
136 /*
137 * 4. Get the SSL context ready
138 */
139 if( ( ret = mbedtls_ssl_setup( &ssl, thread_info->config ) ) != 0 )
140 {
141 mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_setup returned -0x%04x\n",
142 thread_id, -ret );
143 goto thread_exit;
144 }
145
146 mbedtls_ssl_set_bio( &ssl, client_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
147
148 /*
149 * 5. Handshake
150 */
151 mbedtls_printf( " [ #%ld ] Performing the SSL/TLS handshake\n", thread_id );
152
153 while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
154 {
155 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
156 {
157 mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_handshake returned -0x%04x\n",
158 thread_id, -ret );
159 goto thread_exit;
160 }
161 }
162
163 mbedtls_printf( " [ #%ld ] ok\n", thread_id );
164
165 /*
166 * 6. Read the HTTP Request
167 */
168 mbedtls_printf( " [ #%ld ] < Read from client\n", thread_id );
169
170 do
171 {
172 len = sizeof( buf ) - 1;
173 memset( buf, 0, sizeof( buf ) );
174 ret = mbedtls_ssl_read( &ssl, buf, len );
175
176 if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
177 continue;
178
179 if( ret <= 0 )
180 {
181 switch( ret )
182 {
183 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
184 mbedtls_printf( " [ #%ld ] connection was closed gracefully\n",
185 thread_id );
186 goto thread_exit;
187
188 case MBEDTLS_ERR_NET_CONN_RESET:
189 mbedtls_printf( " [ #%ld ] connection was reset by peer\n",
190 thread_id );
191 goto thread_exit;
192
193 default:
194 mbedtls_printf( " [ #%ld ] mbedtls_ssl_read returned -0x%04x\n",
195 thread_id, -ret );
196 goto thread_exit;
197 }
198 }
199
200 len = ret;
201 mbedtls_printf( " [ #%ld ] %d bytes read\n=====\n%s\n=====\n",
202 thread_id, len, (char *) buf );
203
204 if( ret > 0 )
205 break;
206 }
207 while( 1 );
208
209 /*
210 * 7. Write the 200 Response
211 */
212 mbedtls_printf( " [ #%ld ] > Write to client:\n", thread_id );
213
214 len = sprintf( (char *) buf, HTTP_RESPONSE,
215 mbedtls_ssl_get_ciphersuite( &ssl ) );
216
217 while( ( ret = mbedtls_ssl_write( &ssl, buf, len ) ) <= 0 )
218 {
219 if( ret == MBEDTLS_ERR_NET_CONN_RESET )
220 {
221 mbedtls_printf( " [ #%ld ] failed: peer closed the connection\n",
222 thread_id );
223 goto thread_exit;
224 }
225
226 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
227 {
228 mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_write returned -0x%04x\n",
229 thread_id, ret );
230 goto thread_exit;
231 }
232 }
233
234 len = ret;
235 mbedtls_printf( " [ #%ld ] %d bytes written\n=====\n%s\n=====\n",
236 thread_id, len, (char *) buf );
237
238 mbedtls_printf( " [ #%ld ] . Closing the connection...", thread_id );
239
240 while( ( ret = mbedtls_ssl_close_notify( &ssl ) ) < 0 )
241 {
242 if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
243 ret != MBEDTLS_ERR_SSL_WANT_WRITE )
244 {
245 mbedtls_printf( " [ #%ld ] failed: mbedtls_ssl_close_notify returned -0x%04x\n",
246 thread_id, ret );
247 goto thread_exit;
248 }
249 }
250
251 mbedtls_printf( " ok\n" );
252
253 ret = 0;
254
255 thread_exit:
256
257 #ifdef MBEDTLS_ERROR_C
258 if( ret != 0 )
259 {
260 char error_buf[100];
261 mbedtls_strerror( ret, error_buf, 100 );
262 mbedtls_printf(" [ #%ld ] Last error was: -0x%04x - %s\n\n",
263 thread_id, -ret, error_buf );
264 }
265 #endif
266
267 mbedtls_net_free( client_fd );
268 mbedtls_ssl_free( &ssl );
269
270 thread_info->thread_complete = 1;
271
272 return( NULL );
273 }
274
thread_create(mbedtls_net_context * client_fd)275 static int thread_create( mbedtls_net_context *client_fd )
276 {
277 int ret, i;
278
279 /*
280 * Find in-active or finished thread slot
281 */
282 for( i = 0; i < MAX_NUM_THREADS; i++ )
283 {
284 if( threads[i].active == 0 )
285 break;
286
287 if( threads[i].data.thread_complete == 1 )
288 {
289 mbedtls_printf( " [ main ] Cleaning up thread %d\n", i );
290 pthread_join(threads[i].thread, NULL );
291 memset( &threads[i], 0, sizeof(pthread_info_t) );
292 break;
293 }
294 }
295
296 if( i == MAX_NUM_THREADS )
297 return( -1 );
298
299 /*
300 * Fill thread-info for thread
301 */
302 memcpy( &threads[i].data, &base_info, sizeof(base_info) );
303 threads[i].active = 1;
304 memcpy( &threads[i].data.client_fd, client_fd, sizeof( mbedtls_net_context ) );
305
306 if( ( ret = pthread_create( &threads[i].thread, NULL, handle_ssl_connection,
307 &threads[i].data ) ) != 0 )
308 {
309 return( ret );
310 }
311
312 return( 0 );
313 }
314
main(void)315 int main( void )
316 {
317 int ret;
318 mbedtls_net_context listen_fd, client_fd;
319 const char pers[] = "ssl_pthread_server";
320
321 mbedtls_entropy_context entropy;
322 mbedtls_ctr_drbg_context ctr_drbg;
323 mbedtls_ssl_config conf;
324 mbedtls_x509_crt srvcert;
325 mbedtls_x509_crt cachain;
326 mbedtls_pk_context pkey;
327 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
328 unsigned char alloc_buf[100000];
329 #endif
330 #if defined(MBEDTLS_SSL_CACHE_C)
331 mbedtls_ssl_cache_context cache;
332 #endif
333
334 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
335 mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
336 #endif
337
338 #if defined(MBEDTLS_SSL_CACHE_C)
339 mbedtls_ssl_cache_init( &cache );
340 #endif
341
342 mbedtls_x509_crt_init( &srvcert );
343 mbedtls_x509_crt_init( &cachain );
344
345 mbedtls_ssl_config_init( &conf );
346 mbedtls_ctr_drbg_init( &ctr_drbg );
347 memset( threads, 0, sizeof(threads) );
348 mbedtls_net_init( &listen_fd );
349 mbedtls_net_init( &client_fd );
350
351 mbedtls_mutex_init( &debug_mutex );
352
353 base_info.config = &conf;
354
355 /*
356 * We use only a single entropy source that is used in all the threads.
357 */
358 mbedtls_entropy_init( &entropy );
359
360 /*
361 * 1. Load the certificates and private RSA key
362 */
363 mbedtls_printf( "\n . Loading the server cert. and key..." );
364 fflush( stdout );
365
366 /*
367 * This demonstration program uses embedded test certificates.
368 * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
369 * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
370 */
371 ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
372 mbedtls_test_srv_crt_len );
373 if( ret != 0 )
374 {
375 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
376 goto exit;
377 }
378
379 ret = mbedtls_x509_crt_parse( &cachain, (const unsigned char *) mbedtls_test_cas_pem,
380 mbedtls_test_cas_pem_len );
381 if( ret != 0 )
382 {
383 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
384 goto exit;
385 }
386
387 mbedtls_pk_init( &pkey );
388 ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
389 mbedtls_test_srv_key_len, NULL, 0 );
390 if( ret != 0 )
391 {
392 mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
393 goto exit;
394 }
395
396 mbedtls_printf( " ok\n" );
397
398 /*
399 * 1b. Seed the random number generator
400 */
401 mbedtls_printf( " . Seeding the random number generator..." );
402
403 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
404 (const unsigned char *) pers,
405 strlen( pers ) ) ) != 0 )
406 {
407 mbedtls_printf( " failed: mbedtls_ctr_drbg_seed returned -0x%04x\n",
408 -ret );
409 goto exit;
410 }
411
412 mbedtls_printf( " ok\n" );
413
414 /*
415 * 1c. Prepare SSL configuration
416 */
417 mbedtls_printf( " . Setting up the SSL data...." );
418
419 if( ( ret = mbedtls_ssl_config_defaults( &conf,
420 MBEDTLS_SSL_IS_SERVER,
421 MBEDTLS_SSL_TRANSPORT_STREAM,
422 MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
423 {
424 mbedtls_printf( " failed: mbedtls_ssl_config_defaults returned -0x%04x\n",
425 -ret );
426 goto exit;
427 }
428
429 mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
430 mbedtls_ssl_conf_dbg( &conf, my_mutexed_debug, stdout );
431
432 /* mbedtls_ssl_cache_get() and mbedtls_ssl_cache_set() are thread-safe if
433 * MBEDTLS_THREADING_C is set.
434 */
435 #if defined(MBEDTLS_SSL_CACHE_C)
436 mbedtls_ssl_conf_session_cache( &conf, &cache,
437 mbedtls_ssl_cache_get,
438 mbedtls_ssl_cache_set );
439 #endif
440
441 mbedtls_ssl_conf_ca_chain( &conf, &cachain, NULL );
442 if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
443 {
444 mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
445 goto exit;
446 }
447
448 mbedtls_printf( " ok\n" );
449
450
451 /*
452 * 2. Setup the listening TCP socket
453 */
454 mbedtls_printf( " . Bind on https://localhost:4433/ ..." );
455 fflush( stdout );
456
457 if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP ) ) != 0 )
458 {
459 mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
460 goto exit;
461 }
462
463 mbedtls_printf( " ok\n" );
464
465 reset:
466 #ifdef MBEDTLS_ERROR_C
467 if( ret != 0 )
468 {
469 char error_buf[100];
470 mbedtls_strerror( ret, error_buf, 100 );
471 mbedtls_printf( " [ main ] Last error was: -0x%04x - %s\n", -ret, error_buf );
472 }
473 #endif
474
475 /*
476 * 3. Wait until a client connects
477 */
478 mbedtls_printf( " [ main ] Waiting for a remote connection\n" );
479
480 if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
481 NULL, 0, NULL ) ) != 0 )
482 {
483 mbedtls_printf( " [ main ] failed: mbedtls_net_accept returned -0x%04x\n", ret );
484 goto exit;
485 }
486
487 mbedtls_printf( " [ main ] ok\n" );
488 mbedtls_printf( " [ main ] Creating a new thread\n" );
489
490 if( ( ret = thread_create( &client_fd ) ) != 0 )
491 {
492 mbedtls_printf( " [ main ] failed: thread_create returned %d\n", ret );
493 mbedtls_net_free( &client_fd );
494 goto reset;
495 }
496
497 ret = 0;
498 goto reset;
499
500 exit:
501 mbedtls_x509_crt_free( &srvcert );
502 mbedtls_pk_free( &pkey );
503 #if defined(MBEDTLS_SSL_CACHE_C)
504 mbedtls_ssl_cache_free( &cache );
505 #endif
506 mbedtls_ctr_drbg_free( &ctr_drbg );
507 mbedtls_entropy_free( &entropy );
508 mbedtls_ssl_config_free( &conf );
509
510 mbedtls_net_free( &listen_fd );
511
512 mbedtls_mutex_free( &debug_mutex );
513
514 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
515 mbedtls_memory_buffer_alloc_free();
516 #endif
517
518 #if defined(_WIN32)
519 mbedtls_printf( " Press Enter to exit this program.\n" );
520 fflush( stdout ); getchar();
521 #endif
522
523 return( ret );
524 }
525
526 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_CERTS_C && MBEDTLS_ENTROPY_C &&
527 MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
528 MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_THREADING_C &&
529 MBEDTLS_THREADING_PTHREAD && MBEDTLS_PEM_PARSE_C */
530
