1 /*
2 * Certificate reading application
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 #endif
38
39 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
40 !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
41 !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \
42 !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
43 !defined(MBEDTLS_CTR_DRBG_C)
main(void)44 int main( void )
45 {
46 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
47 "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or "
48 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
49 "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
50 "MBEDTLS_CTR_DRBG_C not defined.\n");
51 return( 0 );
52 }
53 #else
54
55 #include "mbedtls/entropy.h"
56 #include "mbedtls/ctr_drbg.h"
57 #include "mbedtls/net_sockets.h"
58 #include "mbedtls/ssl.h"
59 #include "mbedtls/x509.h"
60 #include "mbedtls/debug.h"
61
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65
66 #define MODE_NONE 0
67 #define MODE_FILE 1
68 #define MODE_SSL 2
69
70 #define DFL_MODE MODE_NONE
71 #define DFL_FILENAME "cert.crt"
72 #define DFL_CA_FILE ""
73 #define DFL_CRL_FILE ""
74 #define DFL_CA_PATH ""
75 #define DFL_SERVER_NAME "localhost"
76 #define DFL_SERVER_PORT "4433"
77 #define DFL_DEBUG_LEVEL 0
78 #define DFL_PERMISSIVE 0
79
80 #define USAGE_IO \
81 " ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \
82 " default: \"\" (none)\n" \
83 " crl_file=%%s The single CRL file you want to use\n" \
84 " default: \"\" (none)\n" \
85 " ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \
86 " default: \"\" (none) (overrides ca_file)\n"
87
88 #define USAGE \
89 "\n usage: cert_app param=<>...\n" \
90 "\n acceptable parameters:\n" \
91 " mode=file|ssl default: none\n" \
92 " filename=%%s default: cert.crt\n" \
93 USAGE_IO \
94 " server_name=%%s default: localhost\n" \
95 " server_port=%%d default: 4433\n" \
96 " debug_level=%%d default: 0 (disabled)\n" \
97 " permissive=%%d default: 0 (disabled)\n" \
98 "\n"
99
100 /*
101 * global options
102 */
103 struct options
104 {
105 int mode; /* the mode to run the application in */
106 const char *filename; /* filename of the certificate file */
107 const char *ca_file; /* the file with the CA certificate(s) */
108 const char *crl_file; /* the file with the CRL to use */
109 const char *ca_path; /* the path with the CA certificate(s) reside */
110 const char *server_name; /* hostname of the server (client only) */
111 const char *server_port; /* port on which the ssl service runs */
112 int debug_level; /* level of debugging */
113 int permissive; /* permissive parsing */
114 } opt;
115
my_debug(void * ctx,int level,const char * file,int line,const char * str)116 static void my_debug( void *ctx, int level,
117 const char *file, int line,
118 const char *str )
119 {
120 ((void) level);
121
122 mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
123 fflush( (FILE *) ctx );
124 }
125
my_verify(void * data,mbedtls_x509_crt * crt,int depth,uint32_t * flags)126 static int my_verify( void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags )
127 {
128 char buf[1024];
129 ((void) data);
130
131 mbedtls_printf( "\nVerify requested for (Depth %d):\n", depth );
132 mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt );
133 mbedtls_printf( "%s", buf );
134
135 if ( ( *flags ) == 0 )
136 mbedtls_printf( " This certificate has no flags\n" );
137 else
138 {
139 mbedtls_x509_crt_verify_info( buf, sizeof( buf ), " ! ", *flags );
140 mbedtls_printf( "%s\n", buf );
141 }
142
143 return( 0 );
144 }
145
main(int argc,char * argv[])146 int main( int argc, char *argv[] )
147 {
148 int ret = 0;
149 mbedtls_net_context server_fd;
150 unsigned char buf[1024];
151 mbedtls_entropy_context entropy;
152 mbedtls_ctr_drbg_context ctr_drbg;
153 mbedtls_ssl_context ssl;
154 mbedtls_ssl_config conf;
155 mbedtls_x509_crt cacert;
156 mbedtls_x509_crl cacrl;
157 int i, j;
158 uint32_t flags;
159 int verify = 0;
160 char *p, *q;
161 const char *pers = "cert_app";
162
163 /*
164 * Set to sane values
165 */
166 mbedtls_net_init( &server_fd );
167 mbedtls_ctr_drbg_init( &ctr_drbg );
168 mbedtls_ssl_init( &ssl );
169 mbedtls_ssl_config_init( &conf );
170 mbedtls_x509_crt_init( &cacert );
171 #if defined(MBEDTLS_X509_CRL_PARSE_C)
172 mbedtls_x509_crl_init( &cacrl );
173 #else
174 /* Zeroize structure as CRL parsing is not supported and we have to pass
175 it to the verify function */
176 memset( &cacrl, 0, sizeof(mbedtls_x509_crl) );
177 #endif
178
179 if( argc == 0 )
180 {
181 usage:
182 mbedtls_printf( USAGE );
183 ret = 2;
184 goto exit;
185 }
186
187 opt.mode = DFL_MODE;
188 opt.filename = DFL_FILENAME;
189 opt.ca_file = DFL_CA_FILE;
190 opt.crl_file = DFL_CRL_FILE;
191 opt.ca_path = DFL_CA_PATH;
192 opt.server_name = DFL_SERVER_NAME;
193 opt.server_port = DFL_SERVER_PORT;
194 opt.debug_level = DFL_DEBUG_LEVEL;
195 opt.permissive = DFL_PERMISSIVE;
196
197 for( i = 1; i < argc; i++ )
198 {
199 p = argv[i];
200 if( ( q = strchr( p, '=' ) ) == NULL )
201 goto usage;
202 *q++ = '\0';
203
204 for( j = 0; p + j < q; j++ )
205 {
206 if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
207 argv[i][j] |= 0x20;
208 }
209
210 if( strcmp( p, "mode" ) == 0 )
211 {
212 if( strcmp( q, "file" ) == 0 )
213 opt.mode = MODE_FILE;
214 else if( strcmp( q, "ssl" ) == 0 )
215 opt.mode = MODE_SSL;
216 else
217 goto usage;
218 }
219 else if( strcmp( p, "filename" ) == 0 )
220 opt.filename = q;
221 else if( strcmp( p, "ca_file" ) == 0 )
222 opt.ca_file = q;
223 else if( strcmp( p, "crl_file" ) == 0 )
224 opt.crl_file = q;
225 else if( strcmp( p, "ca_path" ) == 0 )
226 opt.ca_path = q;
227 else if( strcmp( p, "server_name" ) == 0 )
228 opt.server_name = q;
229 else if( strcmp( p, "server_port" ) == 0 )
230 opt.server_port = q;
231 else if( strcmp( p, "debug_level" ) == 0 )
232 {
233 opt.debug_level = atoi( q );
234 if( opt.debug_level < 0 || opt.debug_level > 65535 )
235 goto usage;
236 }
237 else if( strcmp( p, "permissive" ) == 0 )
238 {
239 opt.permissive = atoi( q );
240 if( opt.permissive < 0 || opt.permissive > 1 )
241 goto usage;
242 }
243 else
244 goto usage;
245 }
246
247 /*
248 * 1.1. Load the trusted CA
249 */
250 mbedtls_printf( " . Loading the CA root certificate ..." );
251 fflush( stdout );
252
253 if( strlen( opt.ca_path ) )
254 {
255 ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path );
256 verify = 1;
257 }
258 else if( strlen( opt.ca_file ) )
259 {
260 ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
261 verify = 1;
262 }
263
264 if( ret < 0 )
265 {
266 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
267 goto exit;
268 }
269
270 mbedtls_printf( " ok (%d skipped)\n", ret );
271
272 #if defined(MBEDTLS_X509_CRL_PARSE_C)
273 if( strlen( opt.crl_file ) )
274 {
275 if( ( ret = mbedtls_x509_crl_parse_file( &cacrl, opt.crl_file ) ) != 0 )
276 {
277 mbedtls_printf( " failed\n ! mbedtls_x509_crl_parse returned -0x%x\n\n", -ret );
278 goto exit;
279 }
280
281 verify = 1;
282 }
283 #endif
284
285 if( opt.mode == MODE_FILE )
286 {
287 mbedtls_x509_crt crt;
288 mbedtls_x509_crt *cur = &crt;
289 mbedtls_x509_crt_init( &crt );
290
291 /*
292 * 1.1. Load the certificate(s)
293 */
294 mbedtls_printf( "\n . Loading the certificate(s) ..." );
295 fflush( stdout );
296
297 ret = mbedtls_x509_crt_parse_file( &crt, opt.filename );
298
299 if( ret < 0 )
300 {
301 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file returned %d\n\n", ret );
302 mbedtls_x509_crt_free( &crt );
303 goto exit;
304 }
305
306 if( opt.permissive == 0 && ret > 0 )
307 {
308 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse failed to parse %d certificates\n\n", ret );
309 mbedtls_x509_crt_free( &crt );
310 goto exit;
311 }
312
313 mbedtls_printf( " ok\n" );
314
315 /*
316 * 1.2 Print the certificate(s)
317 */
318 while( cur != NULL )
319 {
320 mbedtls_printf( " . Peer certificate information ...\n" );
321 ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
322 cur );
323 if( ret == -1 )
324 {
325 mbedtls_printf( " failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret );
326 mbedtls_x509_crt_free( &crt );
327 goto exit;
328 }
329
330 mbedtls_printf( "%s\n", buf );
331
332 cur = cur->next;
333 }
334
335 ret = 0;
336
337 /*
338 * 1.3 Verify the certificate
339 */
340 if( verify )
341 {
342 mbedtls_printf( " . Verifying X.509 certificate..." );
343
344 if( ( ret = mbedtls_x509_crt_verify( &crt, &cacert, &cacrl, NULL, &flags,
345 my_verify, NULL ) ) != 0 )
346 {
347 char vrfy_buf[512];
348
349 mbedtls_printf( " failed\n" );
350
351 mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
352
353 mbedtls_printf( "%s\n", vrfy_buf );
354 }
355 else
356 mbedtls_printf( " ok\n" );
357 }
358
359 mbedtls_x509_crt_free( &crt );
360 }
361 else if( opt.mode == MODE_SSL )
362 {
363 /*
364 * 1. Initialize the RNG and the session data
365 */
366 mbedtls_printf( "\n . Seeding the random number generator..." );
367 fflush( stdout );
368
369 mbedtls_entropy_init( &entropy );
370 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
371 (const unsigned char *) pers,
372 strlen( pers ) ) ) != 0 )
373 {
374 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
375 goto ssl_exit;
376 }
377
378 mbedtls_printf( " ok\n" );
379
380 #if defined(MBEDTLS_DEBUG_C)
381 mbedtls_debug_set_threshold( opt.debug_level );
382 #endif
383
384 /*
385 * 2. Start the connection
386 */
387 mbedtls_printf( " . SSL connection to tcp/%s/%s...", opt.server_name,
388 opt.server_port );
389 fflush( stdout );
390
391 if( ( ret = mbedtls_net_connect( &server_fd, opt.server_name,
392 opt.server_port, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
393 {
394 mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
395 goto ssl_exit;
396 }
397
398 /*
399 * 3. Setup stuff
400 */
401 if( ( ret = mbedtls_ssl_config_defaults( &conf,
402 MBEDTLS_SSL_IS_CLIENT,
403 MBEDTLS_SSL_TRANSPORT_STREAM,
404 MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
405 {
406 mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
407 goto exit;
408 }
409
410 if( verify )
411 {
412 mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
413 mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
414 mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
415 }
416 else
417 mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_NONE );
418
419 mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
420 mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
421
422 if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
423 {
424 mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
425 goto ssl_exit;
426 }
427
428 if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
429 {
430 mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
431 goto ssl_exit;
432 }
433
434 mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
435
436 /*
437 * 4. Handshake
438 */
439 while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
440 {
441 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
442 {
443 mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret );
444 goto ssl_exit;
445 }
446 }
447
448 mbedtls_printf( " ok\n" );
449
450 /*
451 * 5. Print the certificate
452 */
453 mbedtls_printf( " . Peer certificate information ...\n" );
454 ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
455 ssl.session->peer_cert );
456 if( ret == -1 )
457 {
458 mbedtls_printf( " failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret );
459 goto ssl_exit;
460 }
461
462 mbedtls_printf( "%s\n", buf );
463
464 mbedtls_ssl_close_notify( &ssl );
465
466 ssl_exit:
467 mbedtls_ssl_free( &ssl );
468 mbedtls_ssl_config_free( &conf );
469 }
470 else
471 goto usage;
472
473 exit:
474
475 mbedtls_net_free( &server_fd );
476 mbedtls_x509_crt_free( &cacert );
477 #if defined(MBEDTLS_X509_CRL_PARSE_C)
478 mbedtls_x509_crl_free( &cacrl );
479 #endif
480 mbedtls_ctr_drbg_free( &ctr_drbg );
481 mbedtls_entropy_free( &entropy );
482
483 #if defined(_WIN32)
484 mbedtls_printf( " + Press Enter to exit this program.\n" );
485 fflush( stdout ); getchar();
486 #endif
487
488 if( ret < 0 )
489 ret = 1;
490
491 return( ret );
492 }
493 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
494 MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
495 MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
496
