1 /*
2 * SSL server demonstration program
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21
22 #if !defined(MBEDTLS_CONFIG_FILE)
23 #include "mbedtls/config.h"
24 #else
25 #include MBEDTLS_CONFIG_FILE
26 #endif
27
28 #if defined(MBEDTLS_PLATFORM_C)
29 #include "mbedtls/platform.h"
30 #else
31 #include <stdio.h>
32 #include <stdlib.h>
33 #define mbedtls_time time
34 #define mbedtls_time_t time_t
35 #define mbedtls_fprintf fprintf
36 #define mbedtls_printf printf
37 #define mbedtls_exit exit
38 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
39 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
40 #endif
41
42 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_CERTS_C) || \
43 !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
44 !defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_NET_C) || \
45 !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
46 !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
47 !defined(MBEDTLS_PEM_PARSE_C)
main(void)48 int main( void )
49 {
50 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_CERTS_C and/or MBEDTLS_ENTROPY_C "
51 "and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
52 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
53 "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C "
54 "and/or MBEDTLS_PEM_PARSE_C not defined.\n");
55 return( 0 );
56 }
57 #else
58
59 #include <stdlib.h>
60 #include <string.h>
61
62 #if defined(_WIN32)
63 #include <windows.h>
64 #endif
65
66 #include "mbedtls/entropy.h"
67 #include "mbedtls/ctr_drbg.h"
68 #include "mbedtls/certs.h"
69 #include "mbedtls/x509.h"
70 #include "mbedtls/ssl.h"
71 #include "mbedtls/net_sockets.h"
72 #include "mbedtls/error.h"
73 #include "mbedtls/debug.h"
74
75 #if defined(MBEDTLS_SSL_CACHE_C)
76 #include "mbedtls/ssl_cache.h"
77 #endif
78
79 #define HTTP_RESPONSE \
80 "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
81 "<h2>mbed TLS Test Server</h2>\r\n" \
82 "<p>Successful connection using: %s</p>\r\n"
83
84 #define DEBUG_LEVEL 0
85
86 #if defined(MBEDTLS_CHECK_PARAMS)
87 #include "mbedtls/platform_util.h"
mbedtls_param_failed(const char * failure_condition,const char * file,int line)88 void mbedtls_param_failed( const char *failure_condition,
89 const char *file,
90 int line )
91 {
92 mbedtls_printf( "%s:%i: Input param failed - %s\n",
93 file, line, failure_condition );
94 mbedtls_exit( MBEDTLS_EXIT_FAILURE );
95 }
96 #endif
97
my_debug(void * ctx,int level,const char * file,int line,const char * str)98 static void my_debug( void *ctx, int level,
99 const char *file, int line,
100 const char *str )
101 {
102 ((void) level);
103
104 mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
105 fflush( (FILE *) ctx );
106 }
107
main(void)108 int main( void )
109 {
110 int ret, len;
111 mbedtls_net_context listen_fd, client_fd;
112 unsigned char buf[1024];
113 const char *pers = "ssl_server";
114
115 mbedtls_entropy_context entropy;
116 mbedtls_ctr_drbg_context ctr_drbg;
117 mbedtls_ssl_context ssl;
118 mbedtls_ssl_config conf;
119 mbedtls_x509_crt srvcert;
120 mbedtls_pk_context pkey;
121 #if defined(MBEDTLS_SSL_CACHE_C)
122 mbedtls_ssl_cache_context cache;
123 #endif
124
125 mbedtls_net_init( &listen_fd );
126 mbedtls_net_init( &client_fd );
127 mbedtls_ssl_init( &ssl );
128 mbedtls_ssl_config_init( &conf );
129 #if defined(MBEDTLS_SSL_CACHE_C)
130 mbedtls_ssl_cache_init( &cache );
131 #endif
132 mbedtls_x509_crt_init( &srvcert );
133 mbedtls_pk_init( &pkey );
134 mbedtls_entropy_init( &entropy );
135 mbedtls_ctr_drbg_init( &ctr_drbg );
136
137 #if defined(MBEDTLS_DEBUG_C)
138 mbedtls_debug_set_threshold( DEBUG_LEVEL );
139 #endif
140
141 /*
142 * 1. Load the certificates and private RSA key
143 */
144 mbedtls_printf( "\n . Loading the server cert. and key..." );
145 fflush( stdout );
146
147 /*
148 * This demonstration program uses embedded test certificates.
149 * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
150 * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
151 */
152 ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
153 mbedtls_test_srv_crt_len );
154 if( ret != 0 )
155 {
156 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
157 goto exit;
158 }
159
160 ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
161 mbedtls_test_cas_pem_len );
162 if( ret != 0 )
163 {
164 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
165 goto exit;
166 }
167
168 ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
169 mbedtls_test_srv_key_len, NULL, 0 );
170 if( ret != 0 )
171 {
172 mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
173 goto exit;
174 }
175
176 mbedtls_printf( " ok\n" );
177
178 /*
179 * 2. Setup the listening TCP socket
180 */
181 mbedtls_printf( " . Bind on https://localhost:4433/ ..." );
182 fflush( stdout );
183
184 if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP ) ) != 0 )
185 {
186 mbedtls_printf( " failed\n ! mbedtls_net_bind returned %d\n\n", ret );
187 goto exit;
188 }
189
190 mbedtls_printf( " ok\n" );
191
192 /*
193 * 3. Seed the RNG
194 */
195 mbedtls_printf( " . Seeding the random number generator..." );
196 fflush( stdout );
197
198 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
199 (const unsigned char *) pers,
200 strlen( pers ) ) ) != 0 )
201 {
202 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
203 goto exit;
204 }
205
206 mbedtls_printf( " ok\n" );
207
208 /*
209 * 4. Setup stuff
210 */
211 mbedtls_printf( " . Setting up the SSL data...." );
212 fflush( stdout );
213
214 if( ( ret = mbedtls_ssl_config_defaults( &conf,
215 MBEDTLS_SSL_IS_SERVER,
216 MBEDTLS_SSL_TRANSPORT_STREAM,
217 MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
218 {
219 mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
220 goto exit;
221 }
222
223 mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
224 mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
225
226 #if defined(MBEDTLS_SSL_CACHE_C)
227 mbedtls_ssl_conf_session_cache( &conf, &cache,
228 mbedtls_ssl_cache_get,
229 mbedtls_ssl_cache_set );
230 #endif
231
232 mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
233 if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
234 {
235 mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
236 goto exit;
237 }
238
239 if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
240 {
241 mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
242 goto exit;
243 }
244
245 mbedtls_printf( " ok\n" );
246
247 reset:
248 #ifdef MBEDTLS_ERROR_C
249 if( ret != 0 )
250 {
251 char error_buf[100];
252 mbedtls_strerror( ret, error_buf, 100 );
253 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf );
254 }
255 #endif
256
257 mbedtls_net_free( &client_fd );
258
259 mbedtls_ssl_session_reset( &ssl );
260
261 /*
262 * 3. Wait until a client connects
263 */
264 mbedtls_printf( " . Waiting for a remote connection ..." );
265 fflush( stdout );
266
267 if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
268 NULL, 0, NULL ) ) != 0 )
269 {
270 mbedtls_printf( " failed\n ! mbedtls_net_accept returned %d\n\n", ret );
271 goto exit;
272 }
273
274 mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
275
276 mbedtls_printf( " ok\n" );
277
278 /*
279 * 5. Handshake
280 */
281 mbedtls_printf( " . Performing the SSL/TLS handshake..." );
282 fflush( stdout );
283
284 while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
285 {
286 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
287 {
288 mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret );
289 goto reset;
290 }
291 }
292
293 mbedtls_printf( " ok\n" );
294
295 /*
296 * 6. Read the HTTP Request
297 */
298 mbedtls_printf( " < Read from client:" );
299 fflush( stdout );
300
301 do
302 {
303 len = sizeof( buf ) - 1;
304 memset( buf, 0, sizeof( buf ) );
305 ret = mbedtls_ssl_read( &ssl, buf, len );
306
307 if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
308 continue;
309
310 if( ret <= 0 )
311 {
312 switch( ret )
313 {
314 case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
315 mbedtls_printf( " connection was closed gracefully\n" );
316 break;
317
318 case MBEDTLS_ERR_NET_CONN_RESET:
319 mbedtls_printf( " connection was reset by peer\n" );
320 break;
321
322 default:
323 mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n", -ret );
324 break;
325 }
326
327 break;
328 }
329
330 len = ret;
331 mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
332
333 if( ret > 0 )
334 break;
335 }
336 while( 1 );
337
338 /*
339 * 7. Write the 200 Response
340 */
341 mbedtls_printf( " > Write to client:" );
342 fflush( stdout );
343
344 len = sprintf( (char *) buf, HTTP_RESPONSE,
345 mbedtls_ssl_get_ciphersuite( &ssl ) );
346
347 while( ( ret = mbedtls_ssl_write( &ssl, buf, len ) ) <= 0 )
348 {
349 if( ret == MBEDTLS_ERR_NET_CONN_RESET )
350 {
351 mbedtls_printf( " failed\n ! peer closed the connection\n\n" );
352 goto reset;
353 }
354
355 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
356 {
357 mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
358 goto exit;
359 }
360 }
361
362 len = ret;
363 mbedtls_printf( " %d bytes written\n\n%s\n", len, (char *) buf );
364
365 mbedtls_printf( " . Closing the connection..." );
366
367 while( ( ret = mbedtls_ssl_close_notify( &ssl ) ) < 0 )
368 {
369 if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
370 ret != MBEDTLS_ERR_SSL_WANT_WRITE )
371 {
372 mbedtls_printf( " failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret );
373 goto reset;
374 }
375 }
376
377 mbedtls_printf( " ok\n" );
378
379 ret = 0;
380 goto reset;
381
382 exit:
383
384 #ifdef MBEDTLS_ERROR_C
385 if( ret != 0 )
386 {
387 char error_buf[100];
388 mbedtls_strerror( ret, error_buf, 100 );
389 mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf );
390 }
391 #endif
392
393 mbedtls_net_free( &client_fd );
394 mbedtls_net_free( &listen_fd );
395
396 mbedtls_x509_crt_free( &srvcert );
397 mbedtls_pk_free( &pkey );
398 mbedtls_ssl_free( &ssl );
399 mbedtls_ssl_config_free( &conf );
400 #if defined(MBEDTLS_SSL_CACHE_C)
401 mbedtls_ssl_cache_free( &cache );
402 #endif
403 mbedtls_ctr_drbg_free( &ctr_drbg );
404 mbedtls_entropy_free( &entropy );
405
406 #if defined(_WIN32)
407 mbedtls_printf( " Press Enter to exit this program.\n" );
408 fflush( stdout ); getchar();
409 #endif
410
411 return( ret );
412 }
413 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_CERTS_C && MBEDTLS_ENTROPY_C &&
414 MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
415 MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_X509_CRT_PARSE_C
416 && MBEDTLS_FS_IO && MBEDTLS_PEM_PARSE_C */
417