1 /*
2 * SSL client for SMTP servers
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 *
7 * This file is provided under the Apache License 2.0, or the
8 * GNU General Public License v2.0 or later.
9 *
10 * **********
11 * Apache License 2.0:
12 *
13 * Licensed under the Apache License, Version 2.0 (the "License"); you may
14 * not use this file except in compliance with the License.
15 * You may obtain a copy of the License at
16 *
17 * http://www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the License for the specific language governing permissions and
23 * limitations under the License.
24 *
25 * **********
26 *
27 * **********
28 * GNU General Public License v2.0 or later:
29 *
30 * This program is free software; you can redistribute it and/or modify
31 * it under the terms of the GNU General Public License as published by
32 * the Free Software Foundation; either version 2 of the License, or
33 * (at your option) any later version.
34 *
35 * This program is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 * GNU General Public License for more details.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
43 *
44 * **********
45 */
46
47 /* Enable definition of gethostname() even when compiling with -std=c99. Must
48 * be set before config.h, which pulls in glibc's features.h indirectly.
49 * Harmless on other platforms. */
50 #define _POSIX_C_SOURCE 200112L
51
52 #if defined(__NetBSD__)
53 #define _XOPEN_SOURCE 600
54 #endif
55
56 #if !defined(MBEDTLS_CONFIG_FILE)
57 #include "mbedtls/config.h"
58 #else
59 #include MBEDTLS_CONFIG_FILE
60 #endif
61
62 #if defined(MBEDTLS_PLATFORM_C)
63 #include "mbedtls/platform.h"
64 #else
65 #include <stdio.h>
66 #include <stdlib.h>
67 #define mbedtls_time time
68 #define mbedtls_time_t time_t
69 #define mbedtls_fprintf fprintf
70 #define mbedtls_printf printf
71 #define mbedtls_exit exit
72 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
73 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
74 #endif /* MBEDTLS_PLATFORM_C */
75
76 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
77 !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
78 !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \
79 !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
80 !defined(MBEDTLS_FS_IO)
main(void)81 int main( void )
82 {
83 mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
84 "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or "
85 "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
86 "MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C "
87 "not defined.\n");
88 mbedtls_exit( 0 );
89 }
90 #else
91
92 #include "mbedtls/base64.h"
93 #include "mbedtls/error.h"
94 #include "mbedtls/net_sockets.h"
95 #include "mbedtls/ssl.h"
96 #include "mbedtls/entropy.h"
97 #include "mbedtls/ctr_drbg.h"
98 #include "mbedtls/certs.h"
99 #include "mbedtls/x509.h"
100
101 #include <stdlib.h>
102 #include <string.h>
103
104 #if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
105 #include <unistd.h>
106 #else
107 #include <io.h>
108 #endif
109
110 #if defined(_WIN32) || defined(_WIN32_WCE)
111 #include <winsock2.h>
112 #include <windows.h>
113
114 #if defined(_MSC_VER)
115 #if defined(_WIN32_WCE)
116 #pragma comment( lib, "ws2.lib" )
117 #else
118 #pragma comment( lib, "ws2_32.lib" )
119 #endif
120 #endif /* _MSC_VER */
121 #endif
122
123 #define DFL_SERVER_NAME "localhost"
124 #define DFL_SERVER_PORT "465"
125 #define DFL_USER_NAME "user"
126 #define DFL_USER_PWD "password"
127 #define DFL_MAIL_FROM ""
128 #define DFL_MAIL_TO ""
129 #define DFL_DEBUG_LEVEL 0
130 #define DFL_CA_FILE ""
131 #define DFL_CRT_FILE ""
132 #define DFL_KEY_FILE ""
133 #define DFL_FORCE_CIPHER 0
134 #define DFL_MODE 0
135 #define DFL_AUTHENTICATION 0
136
137 #define MODE_SSL_TLS 0
138 #define MODE_STARTTLS 0
139
140 #if defined(MBEDTLS_BASE64_C)
141 #define USAGE_AUTH \
142 " authentication=%%d default: 0 (disabled)\n" \
143 " user_name=%%s default: \"" DFL_USER_NAME "\"\n" \
144 " user_pwd=%%s default: \"" DFL_USER_PWD "\"\n"
145 #else
146 #define USAGE_AUTH \
147 " authentication options disabled. (Require MBEDTLS_BASE64_C)\n"
148 #endif /* MBEDTLS_BASE64_C */
149
150 #if defined(MBEDTLS_FS_IO)
151 #define USAGE_IO \
152 " ca_file=%%s default: \"\" (pre-loaded)\n" \
153 " crt_file=%%s default: \"\" (pre-loaded)\n" \
154 " key_file=%%s default: \"\" (pre-loaded)\n"
155 #else
156 #define USAGE_IO \
157 " No file operations available (MBEDTLS_FS_IO not defined)\n"
158 #endif /* MBEDTLS_FS_IO */
159
160 #define USAGE \
161 "\n usage: ssl_mail_client param=<>...\n" \
162 "\n acceptable parameters:\n" \
163 " server_name=%%s default: " DFL_SERVER_NAME "\n" \
164 " server_port=%%d default: " DFL_SERVER_PORT "\n" \
165 " debug_level=%%d default: 0 (disabled)\n" \
166 " mode=%%d default: 0 (SSL/TLS) (1 for STARTTLS)\n" \
167 USAGE_AUTH \
168 " mail_from=%%s default: \"\"\n" \
169 " mail_to=%%s default: \"\"\n" \
170 USAGE_IO \
171 " force_ciphersuite=<name> default: all enabled\n" \
172 " acceptable ciphersuite names:\n"
173
174
175 /*
176 * global options
177 */
178 struct options
179 {
180 const char *server_name; /* hostname of the server (client only) */
181 const char *server_port; /* port on which the ssl service runs */
182 int debug_level; /* level of debugging */
183 int authentication; /* if authentication is required */
184 int mode; /* SSL/TLS (0) or STARTTLS (1) */
185 const char *user_name; /* username to use for authentication */
186 const char *user_pwd; /* password to use for authentication */
187 const char *mail_from; /* E-Mail address to use as sender */
188 const char *mail_to; /* E-Mail address to use as recipient */
189 const char *ca_file; /* the file with the CA certificate(s) */
190 const char *crt_file; /* the file with the client certificate */
191 const char *key_file; /* the file with the client key */
192 int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */
193 } opt;
194
my_debug(void * ctx,int level,const char * file,int line,const char * str)195 static void my_debug( void *ctx, int level,
196 const char *file, int line,
197 const char *str )
198 {
199 ((void) level);
200
201 mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
202 fflush( (FILE *) ctx );
203 }
204
do_handshake(mbedtls_ssl_context * ssl)205 static int do_handshake( mbedtls_ssl_context *ssl )
206 {
207 int ret;
208 uint32_t flags;
209 unsigned char buf[1024];
210 memset(buf, 0, 1024);
211
212 /*
213 * 4. Handshake
214 */
215 mbedtls_printf( " . Performing the SSL/TLS handshake..." );
216 fflush( stdout );
217
218 while( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
219 {
220 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
221 {
222 #if defined(MBEDTLS_ERROR_C)
223 mbedtls_strerror( ret, (char *) buf, 1024 );
224 #endif
225 mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d: %s\n\n", ret, buf );
226 return( -1 );
227 }
228 }
229
230 mbedtls_printf( " ok\n [ Ciphersuite is %s ]\n",
231 mbedtls_ssl_get_ciphersuite( ssl ) );
232
233 /*
234 * 5. Verify the server certificate
235 */
236 mbedtls_printf( " . Verifying peer X.509 certificate..." );
237
238 /* In real life, we probably want to bail out when ret != 0 */
239 if( ( flags = mbedtls_ssl_get_verify_result( ssl ) ) != 0 )
240 {
241 char vrfy_buf[512];
242
243 mbedtls_printf( " failed\n" );
244
245 mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
246
247 mbedtls_printf( "%s\n", vrfy_buf );
248 }
249 else
250 mbedtls_printf( " ok\n" );
251
252 mbedtls_printf( " . Peer certificate information ...\n" );
253 mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
254 mbedtls_ssl_get_peer_cert( ssl ) );
255 mbedtls_printf( "%s\n", buf );
256
257 return( 0 );
258 }
259
write_ssl_data(mbedtls_ssl_context * ssl,unsigned char * buf,size_t len)260 static int write_ssl_data( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
261 {
262 int ret;
263
264 mbedtls_printf("\n%s", buf);
265 while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 0 )
266 {
267 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
268 {
269 mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
270 return -1;
271 }
272 }
273
274 return( 0 );
275 }
276
write_ssl_and_get_response(mbedtls_ssl_context * ssl,unsigned char * buf,size_t len)277 static int write_ssl_and_get_response( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
278 {
279 int ret;
280 unsigned char data[128];
281 char code[4];
282 size_t i, idx = 0;
283
284 mbedtls_printf("\n%s", buf);
285 while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 0 )
286 {
287 if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
288 {
289 mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
290 return -1;
291 }
292 }
293
294 do
295 {
296 len = sizeof( data ) - 1;
297 memset( data, 0, sizeof( data ) );
298 ret = mbedtls_ssl_read( ssl, data, len );
299
300 if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
301 continue;
302
303 if( ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY )
304 return -1;
305
306 if( ret <= 0 )
307 {
308 mbedtls_printf( "failed\n ! mbedtls_ssl_read returned %d\n\n", ret );
309 return -1;
310 }
311
312 mbedtls_printf("\n%s", data);
313 len = ret;
314 for( i = 0; i < len; i++ )
315 {
316 if( data[i] != '\n' )
317 {
318 if( idx < 4 )
319 code[ idx++ ] = data[i];
320 continue;
321 }
322
323 if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
324 {
325 code[3] = '\0';
326 return atoi( code );
327 }
328
329 idx = 0;
330 }
331 }
332 while( 1 );
333 }
334
write_and_get_response(mbedtls_net_context * sock_fd,unsigned char * buf,size_t len)335 static int write_and_get_response( mbedtls_net_context *sock_fd, unsigned char *buf, size_t len )
336 {
337 int ret;
338 unsigned char data[128];
339 char code[4];
340 size_t i, idx = 0;
341
342 mbedtls_printf("\n%s", buf);
343 if( len && ( ret = mbedtls_net_send( sock_fd, buf, len ) ) <= 0 )
344 {
345 mbedtls_printf( " failed\n ! mbedtls_net_send returned %d\n\n", ret );
346 return -1;
347 }
348
349 do
350 {
351 len = sizeof( data ) - 1;
352 memset( data, 0, sizeof( data ) );
353 ret = mbedtls_net_recv( sock_fd, data, len );
354
355 if( ret <= 0 )
356 {
357 mbedtls_printf( "failed\n ! mbedtls_net_recv returned %d\n\n", ret );
358 return -1;
359 }
360
361 data[len] = '\0';
362 mbedtls_printf("\n%s", data);
363 len = ret;
364 for( i = 0; i < len; i++ )
365 {
366 if( data[i] != '\n' )
367 {
368 if( idx < 4 )
369 code[ idx++ ] = data[i];
370 continue;
371 }
372
373 if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
374 {
375 code[3] = '\0';
376 return atoi( code );
377 }
378
379 idx = 0;
380 }
381 }
382 while( 1 );
383 }
384
main(int argc,char * argv[])385 int main( int argc, char *argv[] )
386 {
387 int ret = 1, len;
388 int exit_code = MBEDTLS_EXIT_FAILURE;
389 mbedtls_net_context server_fd;
390 #if defined(MBEDTLS_BASE64_C)
391 unsigned char base[1024];
392 /* buf is used as the destination buffer for printing base with the format:
393 * "%s\r\n". Hence, the size of buf should be at least the size of base
394 * plus 2 bytes for the \r and \n characters.
395 */
396 unsigned char buf[sizeof( base ) + 2];
397 #else
398 unsigned char buf[1024];
399 #endif
400 char hostname[32];
401 const char *pers = "ssl_mail_client";
402
403 mbedtls_entropy_context entropy;
404 mbedtls_ctr_drbg_context ctr_drbg;
405 mbedtls_ssl_context ssl;
406 mbedtls_ssl_config conf;
407 mbedtls_x509_crt cacert;
408 mbedtls_x509_crt clicert;
409 mbedtls_pk_context pkey;
410 int i;
411 size_t n;
412 char *p, *q;
413 const int *list;
414
415 /*
416 * Make sure memory references are valid in case we exit early.
417 */
418 mbedtls_net_init( &server_fd );
419 mbedtls_ssl_init( &ssl );
420 mbedtls_ssl_config_init( &conf );
421 memset( &buf, 0, sizeof( buf ) );
422 mbedtls_x509_crt_init( &cacert );
423 mbedtls_x509_crt_init( &clicert );
424 mbedtls_pk_init( &pkey );
425 mbedtls_ctr_drbg_init( &ctr_drbg );
426
427 if( argc == 0 )
428 {
429 usage:
430 mbedtls_printf( USAGE );
431
432 list = mbedtls_ssl_list_ciphersuites();
433 while( *list )
434 {
435 mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name( *list ) );
436 list++;
437 }
438 mbedtls_printf("\n");
439 goto exit;
440 }
441
442 opt.server_name = DFL_SERVER_NAME;
443 opt.server_port = DFL_SERVER_PORT;
444 opt.debug_level = DFL_DEBUG_LEVEL;
445 opt.authentication = DFL_AUTHENTICATION;
446 opt.mode = DFL_MODE;
447 opt.user_name = DFL_USER_NAME;
448 opt.user_pwd = DFL_USER_PWD;
449 opt.mail_from = DFL_MAIL_FROM;
450 opt.mail_to = DFL_MAIL_TO;
451 opt.ca_file = DFL_CA_FILE;
452 opt.crt_file = DFL_CRT_FILE;
453 opt.key_file = DFL_KEY_FILE;
454 opt.force_ciphersuite[0]= DFL_FORCE_CIPHER;
455
456 for( i = 1; i < argc; i++ )
457 {
458 p = argv[i];
459 if( ( q = strchr( p, '=' ) ) == NULL )
460 goto usage;
461 *q++ = '\0';
462
463 if( strcmp( p, "server_name" ) == 0 )
464 opt.server_name = q;
465 else if( strcmp( p, "server_port" ) == 0 )
466 opt.server_port = q;
467 else if( strcmp( p, "debug_level" ) == 0 )
468 {
469 opt.debug_level = atoi( q );
470 if( opt.debug_level < 0 || opt.debug_level > 65535 )
471 goto usage;
472 }
473 else if( strcmp( p, "authentication" ) == 0 )
474 {
475 opt.authentication = atoi( q );
476 if( opt.authentication < 0 || opt.authentication > 1 )
477 goto usage;
478 }
479 else if( strcmp( p, "mode" ) == 0 )
480 {
481 opt.mode = atoi( q );
482 if( opt.mode < 0 || opt.mode > 1 )
483 goto usage;
484 }
485 else if( strcmp( p, "user_name" ) == 0 )
486 opt.user_name = q;
487 else if( strcmp( p, "user_pwd" ) == 0 )
488 opt.user_pwd = q;
489 else if( strcmp( p, "mail_from" ) == 0 )
490 opt.mail_from = q;
491 else if( strcmp( p, "mail_to" ) == 0 )
492 opt.mail_to = q;
493 else if( strcmp( p, "ca_file" ) == 0 )
494 opt.ca_file = q;
495 else if( strcmp( p, "crt_file" ) == 0 )
496 opt.crt_file = q;
497 else if( strcmp( p, "key_file" ) == 0 )
498 opt.key_file = q;
499 else if( strcmp( p, "force_ciphersuite" ) == 0 )
500 {
501 opt.force_ciphersuite[0] = -1;
502
503 opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( q );
504
505 if( opt.force_ciphersuite[0] <= 0 )
506 goto usage;
507
508 opt.force_ciphersuite[1] = 0;
509 }
510 else
511 goto usage;
512 }
513
514 /*
515 * 0. Initialize the RNG and the session data
516 */
517 mbedtls_printf( "\n . Seeding the random number generator..." );
518 fflush( stdout );
519
520 mbedtls_entropy_init( &entropy );
521 if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
522 (const unsigned char *) pers,
523 strlen( pers ) ) ) != 0 )
524 {
525 mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
526 goto exit;
527 }
528
529 mbedtls_printf( " ok\n" );
530
531 /*
532 * 1.1. Load the trusted CA
533 */
534 mbedtls_printf( " . Loading the CA root certificate ..." );
535 fflush( stdout );
536
537 #if defined(MBEDTLS_FS_IO)
538 if( strlen( opt.ca_file ) )
539 ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
540 else
541 #endif
542 #if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_PEM_PARSE_C)
543 ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
544 mbedtls_test_cas_pem_len );
545 #else
546 {
547 mbedtls_printf("MBEDTLS_CERTS_C and/or MBEDTLS_PEM_PARSE_C not defined.");
548 goto exit;
549 }
550 #endif
551 if( ret < 0 )
552 {
553 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
554 goto exit;
555 }
556
557 mbedtls_printf( " ok (%d skipped)\n", ret );
558
559 /*
560 * 1.2. Load own certificate and private key
561 *
562 * (can be skipped if client authentication is not required)
563 */
564 mbedtls_printf( " . Loading the client cert. and key..." );
565 fflush( stdout );
566
567 #if defined(MBEDTLS_FS_IO)
568 if( strlen( opt.crt_file ) )
569 ret = mbedtls_x509_crt_parse_file( &clicert, opt.crt_file );
570 else
571 #endif
572 #if defined(MBEDTLS_CERTS_C)
573 ret = mbedtls_x509_crt_parse( &clicert, (const unsigned char *) mbedtls_test_cli_crt,
574 mbedtls_test_cli_crt_len );
575 #else
576 {
577 mbedtls_printf("MBEDTLS_CERTS_C not defined.");
578 goto exit;
579 }
580 #endif
581 if( ret != 0 )
582 {
583 mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
584 goto exit;
585 }
586
587 #if defined(MBEDTLS_FS_IO)
588 if( strlen( opt.key_file ) )
589 ret = mbedtls_pk_parse_keyfile( &pkey, opt.key_file, "" );
590 else
591 #endif
592 #if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_PEM_PARSE_C)
593 ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_cli_key,
594 mbedtls_test_cli_key_len, NULL, 0 );
595 #else
596 {
597 mbedtls_printf("MBEDTLS_CERTS_C or MBEDTLS_PEM_PARSE_C not defined.");
598 goto exit;
599 }
600 #endif
601 if( ret != 0 )
602 {
603 mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
604 goto exit;
605 }
606
607 mbedtls_printf( " ok\n" );
608
609 /*
610 * 2. Start the connection
611 */
612 mbedtls_printf( " . Connecting to tcp/%s/%s...", opt.server_name,
613 opt.server_port );
614 fflush( stdout );
615
616 if( ( ret = mbedtls_net_connect( &server_fd, opt.server_name,
617 opt.server_port, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
618 {
619 mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
620 goto exit;
621 }
622
623 mbedtls_printf( " ok\n" );
624
625 /*
626 * 3. Setup stuff
627 */
628 mbedtls_printf( " . Setting up the SSL/TLS structure..." );
629 fflush( stdout );
630
631 if( ( ret = mbedtls_ssl_config_defaults( &conf,
632 MBEDTLS_SSL_IS_CLIENT,
633 MBEDTLS_SSL_TRANSPORT_STREAM,
634 MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
635 {
636 mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
637 goto exit;
638 }
639
640 /* OPTIONAL is not optimal for security,
641 * but makes interop easier in this simplified example */
642 mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
643
644 mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
645 mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
646
647 if( opt.force_ciphersuite[0] != DFL_FORCE_CIPHER )
648 mbedtls_ssl_conf_ciphersuites( &conf, opt.force_ciphersuite );
649
650 mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
651 if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &clicert, &pkey ) ) != 0 )
652 {
653 mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
654 goto exit;
655 }
656
657 if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
658 {
659 mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
660 goto exit;
661 }
662
663 if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
664 {
665 mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
666 goto exit;
667 }
668
669 mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
670
671 mbedtls_printf( " ok\n" );
672
673 if( opt.mode == MODE_SSL_TLS )
674 {
675 if( do_handshake( &ssl ) != 0 )
676 goto exit;
677
678 mbedtls_printf( " > Get header from server:" );
679 fflush( stdout );
680
681 ret = write_ssl_and_get_response( &ssl, buf, 0 );
682 if( ret < 200 || ret > 299 )
683 {
684 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
685 goto exit;
686 }
687
688 mbedtls_printf(" ok\n" );
689
690 mbedtls_printf( " > Write EHLO to server:" );
691 fflush( stdout );
692
693 gethostname( hostname, 32 );
694 len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
695 ret = write_ssl_and_get_response( &ssl, buf, len );
696 if( ret < 200 || ret > 299 )
697 {
698 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
699 goto exit;
700 }
701 }
702 else
703 {
704 mbedtls_printf( " > Get header from server:" );
705 fflush( stdout );
706
707 ret = write_and_get_response( &server_fd, buf, 0 );
708 if( ret < 200 || ret > 299 )
709 {
710 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
711 goto exit;
712 }
713
714 mbedtls_printf(" ok\n" );
715
716 mbedtls_printf( " > Write EHLO to server:" );
717 fflush( stdout );
718
719 gethostname( hostname, 32 );
720 len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
721 ret = write_and_get_response( &server_fd, buf, len );
722 if( ret < 200 || ret > 299 )
723 {
724 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
725 goto exit;
726 }
727
728 mbedtls_printf(" ok\n" );
729
730 mbedtls_printf( " > Write STARTTLS to server:" );
731 fflush( stdout );
732
733 gethostname( hostname, 32 );
734 len = sprintf( (char *) buf, "STARTTLS\r\n" );
735 ret = write_and_get_response( &server_fd, buf, len );
736 if( ret < 200 || ret > 299 )
737 {
738 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
739 goto exit;
740 }
741
742 mbedtls_printf(" ok\n" );
743
744 if( do_handshake( &ssl ) != 0 )
745 goto exit;
746 }
747
748 #if defined(MBEDTLS_BASE64_C)
749 if( opt.authentication )
750 {
751 mbedtls_printf( " > Write AUTH LOGIN to server:" );
752 fflush( stdout );
753
754 len = sprintf( (char *) buf, "AUTH LOGIN\r\n" );
755 ret = write_ssl_and_get_response( &ssl, buf, len );
756 if( ret < 200 || ret > 399 )
757 {
758 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
759 goto exit;
760 }
761
762 mbedtls_printf(" ok\n" );
763
764 mbedtls_printf( " > Write username to server: %s", opt.user_name );
765 fflush( stdout );
766
767 ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_name,
768 strlen( opt.user_name ) );
769
770 if( ret != 0 ) {
771 mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
772 goto exit;
773 }
774 len = sprintf( (char *) buf, "%s\r\n", base );
775 ret = write_ssl_and_get_response( &ssl, buf, len );
776 if( ret < 300 || ret > 399 )
777 {
778 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
779 goto exit;
780 }
781
782 mbedtls_printf(" ok\n" );
783
784 mbedtls_printf( " > Write password to server: %s", opt.user_pwd );
785 fflush( stdout );
786
787 ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_pwd,
788 strlen( opt.user_pwd ) );
789
790 if( ret != 0 ) {
791 mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
792 goto exit;
793 }
794 len = sprintf( (char *) buf, "%s\r\n", base );
795 ret = write_ssl_and_get_response( &ssl, buf, len );
796 if( ret < 200 || ret > 399 )
797 {
798 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
799 goto exit;
800 }
801
802 mbedtls_printf(" ok\n" );
803 }
804 #endif
805
806 mbedtls_printf( " > Write MAIL FROM to server:" );
807 fflush( stdout );
808
809 len = sprintf( (char *) buf, "MAIL FROM:<%s>\r\n", opt.mail_from );
810 ret = write_ssl_and_get_response( &ssl, buf, len );
811 if( ret < 200 || ret > 299 )
812 {
813 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
814 goto exit;
815 }
816
817 mbedtls_printf(" ok\n" );
818
819 mbedtls_printf( " > Write RCPT TO to server:" );
820 fflush( stdout );
821
822 len = sprintf( (char *) buf, "RCPT TO:<%s>\r\n", opt.mail_to );
823 ret = write_ssl_and_get_response( &ssl, buf, len );
824 if( ret < 200 || ret > 299 )
825 {
826 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
827 goto exit;
828 }
829
830 mbedtls_printf(" ok\n" );
831
832 mbedtls_printf( " > Write DATA to server:" );
833 fflush( stdout );
834
835 len = sprintf( (char *) buf, "DATA\r\n" );
836 ret = write_ssl_and_get_response( &ssl, buf, len );
837 if( ret < 300 || ret > 399 )
838 {
839 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
840 goto exit;
841 }
842
843 mbedtls_printf(" ok\n" );
844
845 mbedtls_printf( " > Write content to server:" );
846 fflush( stdout );
847
848 len = sprintf( (char *) buf, "From: %s\r\nSubject: mbed TLS Test mail\r\n\r\n"
849 "This is a simple test mail from the "
850 "mbed TLS mail client example.\r\n"
851 "\r\n"
852 "Enjoy!", opt.mail_from );
853 ret = write_ssl_data( &ssl, buf, len );
854
855 len = sprintf( (char *) buf, "\r\n.\r\n");
856 ret = write_ssl_and_get_response( &ssl, buf, len );
857 if( ret < 200 || ret > 299 )
858 {
859 mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
860 goto exit;
861 }
862
863 mbedtls_printf(" ok\n" );
864
865 mbedtls_ssl_close_notify( &ssl );
866
867 exit_code = MBEDTLS_EXIT_SUCCESS;
868
869 exit:
870
871 mbedtls_net_free( &server_fd );
872 mbedtls_x509_crt_free( &clicert );
873 mbedtls_x509_crt_free( &cacert );
874 mbedtls_pk_free( &pkey );
875 mbedtls_ssl_free( &ssl );
876 mbedtls_ssl_config_free( &conf );
877 mbedtls_ctr_drbg_free( &ctr_drbg );
878 mbedtls_entropy_free( &entropy );
879
880 #if defined(_WIN32)
881 mbedtls_printf( " + Press Enter to exit this program.\n" );
882 fflush( stdout ); getchar();
883 #endif
884
885 mbedtls_exit( exit_code );
886 }
887 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
888 MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C **
889 MBEDTLS_CTR_DRBG_C */
890