GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/openssl/smime.c Lines: 0 456 0.0 %
Date: 2016-12-06 Branches: 0 342 0.0 %

Line Branch Exec Source
1
/* $OpenBSD: smime.c,v 1.7 2015/10/17 15:00:11 doug Exp $ */
2
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3
 * project.
4
 */
5
/* ====================================================================
6
 * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 *
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
14
 *
15
 * 2. Redistributions in binary form must reproduce the above copyright
16
 *    notice, this list of conditions and the following disclaimer in
17
 *    the documentation and/or other materials provided with the
18
 *    distribution.
19
 *
20
 * 3. All advertising materials mentioning features or use of this
21
 *    software must display the following acknowledgment:
22
 *    "This product includes software developed by the OpenSSL Project
23
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24
 *
25
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26
 *    endorse or promote products derived from this software without
27
 *    prior written permission. For written permission, please contact
28
 *    licensing@OpenSSL.org.
29
 *
30
 * 5. Products derived from this software may not be called "OpenSSL"
31
 *    nor may "OpenSSL" appear in their names without prior written
32
 *    permission of the OpenSSL Project.
33
 *
34
 * 6. Redistributions of any form whatsoever must retain the following
35
 *    acknowledgment:
36
 *    "This product includes software developed by the OpenSSL Project
37
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38
 *
39
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50
 * OF THE POSSIBILITY OF SUCH DAMAGE.
51
 * ====================================================================
52
 *
53
 * This product includes cryptographic software written by Eric Young
54
 * (eay@cryptsoft.com).  This product includes software written by Tim
55
 * Hudson (tjh@cryptsoft.com).
56
 *
57
 */
58
59
/* S/MIME utility function */
60
61
#include <stdio.h>
62
#include <string.h>
63
64
#include "apps.h"
65
66
#include <openssl/crypto.h>
67
#include <openssl/err.h>
68
#include <openssl/pem.h>
69
#include <openssl/x509_vfy.h>
70
#include <openssl/x509v3.h>
71
72
static int save_certs(char *signerfile, STACK_OF(X509) * signers);
73
static int smime_cb(int ok, X509_STORE_CTX * ctx);
74
75
#define SMIME_OP	0x10
76
#define SMIME_IP	0x20
77
#define SMIME_SIGNERS	0x40
78
#define SMIME_ENCRYPT	(1 | SMIME_OP)
79
#define SMIME_DECRYPT	(2 | SMIME_IP)
80
#define SMIME_SIGN	(3 | SMIME_OP | SMIME_SIGNERS)
81
#define SMIME_VERIFY	(4 | SMIME_IP)
82
#define SMIME_PK7OUT	(5 | SMIME_IP | SMIME_OP)
83
#define SMIME_RESIGN	(6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
84
85
int
86
smime_main(int argc, char **argv)
87
{
88
	int operation = 0;
89
	int ret = 0;
90
	char **args;
91
	const char *inmode = "r", *outmode = "w";
92
	char *infile = NULL, *outfile = NULL;
93
	char *signerfile = NULL, *recipfile = NULL;
94
	STACK_OF(OPENSSL_STRING) * sksigners = NULL, *skkeys = NULL;
95
	char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
96
	const EVP_CIPHER *cipher = NULL;
97
	PKCS7 *p7 = NULL;
98
	X509_STORE *store = NULL;
99
	X509 *cert = NULL, *recip = NULL, *signer = NULL;
100
	EVP_PKEY *key = NULL;
101
	STACK_OF(X509) * encerts = NULL, *other = NULL;
102
	BIO *in = NULL, *out = NULL, *indata = NULL;
103
	int badarg = 0;
104
	int flags = PKCS7_DETACHED;
105
	char *to = NULL, *from = NULL, *subject = NULL;
106
	char *CAfile = NULL, *CApath = NULL;
107
	char *passargin = NULL, *passin = NULL;
108
	int indef = 0;
109
	const EVP_MD *sign_md = NULL;
110
	int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
111
	int keyform = FORMAT_PEM;
112
113
	X509_VERIFY_PARAM *vpm = NULL;
114
115
	if (single_execution) {
116
		if (pledge("stdio rpath wpath cpath tty", NULL) == -1) {
117
			perror("pledge");
118
			exit(1);
119
		}
120
	}
121
122
	args = argv + 1;
123
	ret = 1;
124
125
	while (!badarg && *args && *args[0] == '-') {
126
		if (!strcmp(*args, "-encrypt"))
127
			operation = SMIME_ENCRYPT;
128
		else if (!strcmp(*args, "-decrypt"))
129
			operation = SMIME_DECRYPT;
130
		else if (!strcmp(*args, "-sign"))
131
			operation = SMIME_SIGN;
132
		else if (!strcmp(*args, "-resign"))
133
			operation = SMIME_RESIGN;
134
		else if (!strcmp(*args, "-verify"))
135
			operation = SMIME_VERIFY;
136
		else if (!strcmp(*args, "-pk7out"))
137
			operation = SMIME_PK7OUT;
138
#ifndef OPENSSL_NO_DES
139
		else if (!strcmp(*args, "-des3"))
140
			cipher = EVP_des_ede3_cbc();
141
		else if (!strcmp(*args, "-des"))
142
			cipher = EVP_des_cbc();
143
#endif
144
#ifndef OPENSSL_NO_RC2
145
		else if (!strcmp(*args, "-rc2-40"))
146
			cipher = EVP_rc2_40_cbc();
147
		else if (!strcmp(*args, "-rc2-128"))
148
			cipher = EVP_rc2_cbc();
149
		else if (!strcmp(*args, "-rc2-64"))
150
			cipher = EVP_rc2_64_cbc();
151
#endif
152
#ifndef OPENSSL_NO_AES
153
		else if (!strcmp(*args, "-aes128"))
154
			cipher = EVP_aes_128_cbc();
155
		else if (!strcmp(*args, "-aes192"))
156
			cipher = EVP_aes_192_cbc();
157
		else if (!strcmp(*args, "-aes256"))
158
			cipher = EVP_aes_256_cbc();
159
#endif
160
#ifndef OPENSSL_NO_CAMELLIA
161
		else if (!strcmp(*args, "-camellia128"))
162
			cipher = EVP_camellia_128_cbc();
163
		else if (!strcmp(*args, "-camellia192"))
164
			cipher = EVP_camellia_192_cbc();
165
		else if (!strcmp(*args, "-camellia256"))
166
			cipher = EVP_camellia_256_cbc();
167
#endif
168
		else if (!strcmp(*args, "-text"))
169
			flags |= PKCS7_TEXT;
170
		else if (!strcmp(*args, "-nointern"))
171
			flags |= PKCS7_NOINTERN;
172
		else if (!strcmp(*args, "-noverify"))
173
			flags |= PKCS7_NOVERIFY;
174
		else if (!strcmp(*args, "-nochain"))
175
			flags |= PKCS7_NOCHAIN;
176
		else if (!strcmp(*args, "-nocerts"))
177
			flags |= PKCS7_NOCERTS;
178
		else if (!strcmp(*args, "-noattr"))
179
			flags |= PKCS7_NOATTR;
180
		else if (!strcmp(*args, "-nodetach"))
181
			flags &= ~PKCS7_DETACHED;
182
		else if (!strcmp(*args, "-nosmimecap"))
183
			flags |= PKCS7_NOSMIMECAP;
184
		else if (!strcmp(*args, "-binary"))
185
			flags |= PKCS7_BINARY;
186
		else if (!strcmp(*args, "-nosigs"))
187
			flags |= PKCS7_NOSIGS;
188
		else if (!strcmp(*args, "-stream"))
189
			indef = 1;
190
		else if (!strcmp(*args, "-indef"))
191
			indef = 1;
192
		else if (!strcmp(*args, "-noindef"))
193
			indef = 0;
194
		else if (!strcmp(*args, "-nooldmime"))
195
			flags |= PKCS7_NOOLDMIMETYPE;
196
		else if (!strcmp(*args, "-crlfeol"))
197
			flags |= PKCS7_CRLFEOL;
198
		else if (!strcmp(*args, "-passin")) {
199
			if (!args[1])
200
				goto argerr;
201
			passargin = *++args;
202
		} else if (!strcmp(*args, "-to")) {
203
			if (!args[1])
204
				goto argerr;
205
			to = *++args;
206
		} else if (!strcmp(*args, "-from")) {
207
			if (!args[1])
208
				goto argerr;
209
			from = *++args;
210
		} else if (!strcmp(*args, "-subject")) {
211
			if (!args[1])
212
				goto argerr;
213
			subject = *++args;
214
		} else if (!strcmp(*args, "-signer")) {
215
			if (!args[1])
216
				goto argerr;
217
			/* If previous -signer argument add signer to list */
218
219
			if (signerfile) {
220
				if (!sksigners)
221
					sksigners = sk_OPENSSL_STRING_new_null();
222
				sk_OPENSSL_STRING_push(sksigners, signerfile);
223
				if (!keyfile)
224
					keyfile = signerfile;
225
				if (!skkeys)
226
					skkeys = sk_OPENSSL_STRING_new_null();
227
				sk_OPENSSL_STRING_push(skkeys, keyfile);
228
				keyfile = NULL;
229
			}
230
			signerfile = *++args;
231
		} else if (!strcmp(*args, "-recip")) {
232
			if (!args[1])
233
				goto argerr;
234
			recipfile = *++args;
235
		} else if (!strcmp(*args, "-md")) {
236
			if (!args[1])
237
				goto argerr;
238
			sign_md = EVP_get_digestbyname(*++args);
239
			if (sign_md == NULL) {
240
				BIO_printf(bio_err, "Unknown digest %s\n",
241
				    *args);
242
				goto argerr;
243
			}
244
		} else if (!strcmp(*args, "-inkey")) {
245
			if (!args[1])
246
				goto argerr;
247
			/* If previous -inkey arument add signer to list */
248
			if (keyfile) {
249
				if (!signerfile) {
250
					BIO_puts(bio_err, "Illegal -inkey without -signer\n");
251
					goto argerr;
252
				}
253
				if (!sksigners)
254
					sksigners = sk_OPENSSL_STRING_new_null();
255
				sk_OPENSSL_STRING_push(sksigners, signerfile);
256
				signerfile = NULL;
257
				if (!skkeys)
258
					skkeys = sk_OPENSSL_STRING_new_null();
259
				sk_OPENSSL_STRING_push(skkeys, keyfile);
260
			}
261
			keyfile = *++args;
262
		} else if (!strcmp(*args, "-keyform")) {
263
			if (!args[1])
264
				goto argerr;
265
			keyform = str2fmt(*++args);
266
		} else if (!strcmp(*args, "-certfile")) {
267
			if (!args[1])
268
				goto argerr;
269
			certfile = *++args;
270
		} else if (!strcmp(*args, "-CAfile")) {
271
			if (!args[1])
272
				goto argerr;
273
			CAfile = *++args;
274
		} else if (!strcmp(*args, "-CApath")) {
275
			if (!args[1])
276
				goto argerr;
277
			CApath = *++args;
278
		} else if (!strcmp(*args, "-in")) {
279
			if (!args[1])
280
				goto argerr;
281
			infile = *++args;
282
		} else if (!strcmp(*args, "-inform")) {
283
			if (!args[1])
284
				goto argerr;
285
			informat = str2fmt(*++args);
286
		} else if (!strcmp(*args, "-outform")) {
287
			if (!args[1])
288
				goto argerr;
289
			outformat = str2fmt(*++args);
290
		} else if (!strcmp(*args, "-out")) {
291
			if (!args[1])
292
				goto argerr;
293
			outfile = *++args;
294
		} else if (!strcmp(*args, "-content")) {
295
			if (!args[1])
296
				goto argerr;
297
			contfile = *++args;
298
		} else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
299
			continue;
300
		else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
301
			badarg = 1;
302
		args++;
303
	}
304
305
	if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) {
306
		BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
307
		goto argerr;
308
	}
309
	if (operation & SMIME_SIGNERS) {
310
		/* Check to see if any final signer needs to be appended */
311
		if (keyfile && !signerfile) {
312
			BIO_puts(bio_err, "Illegal -inkey without -signer\n");
313
			goto argerr;
314
		}
315
		if (signerfile) {
316
			if (!sksigners)
317
				sksigners = sk_OPENSSL_STRING_new_null();
318
			sk_OPENSSL_STRING_push(sksigners, signerfile);
319
			if (!skkeys)
320
				skkeys = sk_OPENSSL_STRING_new_null();
321
			if (!keyfile)
322
				keyfile = signerfile;
323
			sk_OPENSSL_STRING_push(skkeys, keyfile);
324
		}
325
		if (!sksigners) {
326
			BIO_printf(bio_err, "No signer certificate specified\n");
327
			badarg = 1;
328
		}
329
		signerfile = NULL;
330
		keyfile = NULL;
331
	} else if (operation == SMIME_DECRYPT) {
332
		if (!recipfile && !keyfile) {
333
			BIO_printf(bio_err, "No recipient certificate or key specified\n");
334
			badarg = 1;
335
		}
336
	} else if (operation == SMIME_ENCRYPT) {
337
		if (!*args) {
338
			BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
339
			badarg = 1;
340
		}
341
	} else if (!operation)
342
		badarg = 1;
343
344
	if (badarg) {
345
argerr:
346
		BIO_printf(bio_err, "Usage smime [options] cert.pem ...\n");
347
		BIO_printf(bio_err, "where options are\n");
348
		BIO_printf(bio_err, "-encrypt       encrypt message\n");
349
		BIO_printf(bio_err, "-decrypt       decrypt encrypted message\n");
350
		BIO_printf(bio_err, "-sign          sign message\n");
351
		BIO_printf(bio_err, "-verify        verify signed message\n");
352
		BIO_printf(bio_err, "-pk7out        output PKCS#7 structure\n");
353
#ifndef OPENSSL_NO_DES
354
		BIO_printf(bio_err, "-des3          encrypt with triple DES\n");
355
		BIO_printf(bio_err, "-des           encrypt with DES\n");
356
#endif
357
#ifndef OPENSSL_NO_RC2
358
		BIO_printf(bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
359
		BIO_printf(bio_err, "-rc2-64        encrypt with RC2-64\n");
360
		BIO_printf(bio_err, "-rc2-128       encrypt with RC2-128\n");
361
#endif
362
#ifndef OPENSSL_NO_AES
363
		BIO_printf(bio_err, "-aes128, -aes192, -aes256\n");
364
		BIO_printf(bio_err, "               encrypt PEM output with cbc aes\n");
365
#endif
366
#ifndef OPENSSL_NO_CAMELLIA
367
		BIO_printf(bio_err, "-camellia128, -camellia192, -camellia256\n");
368
		BIO_printf(bio_err, "               encrypt PEM output with cbc camellia\n");
369
#endif
370
		BIO_printf(bio_err, "-nointern      don't search certificates in message for signer\n");
371
		BIO_printf(bio_err, "-nosigs        don't verify message signature\n");
372
		BIO_printf(bio_err, "-noverify      don't verify signers certificate\n");
373
		BIO_printf(bio_err, "-nocerts       don't include signers certificate when signing\n");
374
		BIO_printf(bio_err, "-nodetach      use opaque signing\n");
375
		BIO_printf(bio_err, "-noattr        don't include any signed attributes\n");
376
		BIO_printf(bio_err, "-binary        don't translate message to text\n");
377
		BIO_printf(bio_err, "-certfile file other certificates file\n");
378
		BIO_printf(bio_err, "-signer file   signer certificate file\n");
379
		BIO_printf(bio_err, "-recip  file   recipient certificate file for decryption\n");
380
		BIO_printf(bio_err, "-in file       input file\n");
381
		BIO_printf(bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
382
		BIO_printf(bio_err, "-inkey file    input private key (if not signer or recipient)\n");
383
		BIO_printf(bio_err, "-keyform arg   input private key format (PEM)\n");
384
		BIO_printf(bio_err, "-out file      output file\n");
385
		BIO_printf(bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
386
		BIO_printf(bio_err, "-content file  supply or override content for detached signature\n");
387
		BIO_printf(bio_err, "-to addr       to address\n");
388
		BIO_printf(bio_err, "-from ad       from address\n");
389
		BIO_printf(bio_err, "-subject s     subject\n");
390
		BIO_printf(bio_err, "-text          include or delete text MIME headers\n");
391
		BIO_printf(bio_err, "-CApath dir    trusted certificates directory\n");
392
		BIO_printf(bio_err, "-CAfile file   trusted certificates file\n");
393
		BIO_printf(bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
394
		BIO_printf(bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
395
		BIO_printf(bio_err, "-passin arg    input file pass phrase source\n");
396
		BIO_printf(bio_err, "cert.pem       recipient certificate(s) for encryption\n");
397
		goto end;
398
	}
399
400
	if (!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
401
		BIO_printf(bio_err, "Error getting password\n");
402
		goto end;
403
	}
404
	ret = 2;
405
406
	if (!(operation & SMIME_SIGNERS))
407
		flags &= ~PKCS7_DETACHED;
408
409
	if (operation & SMIME_OP) {
410
		if (outformat == FORMAT_ASN1)
411
			outmode = "wb";
412
	} else {
413
		if (flags & PKCS7_BINARY)
414
			outmode = "wb";
415
	}
416
417
	if (operation & SMIME_IP) {
418
		if (informat == FORMAT_ASN1)
419
			inmode = "rb";
420
	} else {
421
		if (flags & PKCS7_BINARY)
422
			inmode = "rb";
423
	}
424
425
	if (operation == SMIME_ENCRYPT) {
426
		if (!cipher) {
427
#ifndef OPENSSL_NO_RC2
428
			cipher = EVP_rc2_40_cbc();
429
#else
430
			BIO_printf(bio_err, "No cipher selected\n");
431
			goto end;
432
#endif
433
		}
434
		encerts = sk_X509_new_null();
435
		while (*args) {
436
			if (!(cert = load_cert(bio_err, *args, FORMAT_PEM,
437
			    NULL, "recipient certificate file"))) {
438
				goto end;
439
			}
440
			sk_X509_push(encerts, cert);
441
			cert = NULL;
442
			args++;
443
		}
444
	}
445
	if (certfile) {
446
		if (!(other = load_certs(bio_err, certfile, FORMAT_PEM, NULL,
447
		    "certificate file"))) {
448
			ERR_print_errors(bio_err);
449
			goto end;
450
		}
451
	}
452
	if (recipfile && (operation == SMIME_DECRYPT)) {
453
		if (!(recip = load_cert(bio_err, recipfile, FORMAT_PEM, NULL,
454
		    "recipient certificate file"))) {
455
			ERR_print_errors(bio_err);
456
			goto end;
457
		}
458
	}
459
	if (operation == SMIME_DECRYPT) {
460
		if (!keyfile)
461
			keyfile = recipfile;
462
	} else if (operation == SMIME_SIGN) {
463
		if (!keyfile)
464
			keyfile = signerfile;
465
	} else
466
		keyfile = NULL;
467
468
	if (keyfile) {
469
		key = load_key(bio_err, keyfile, keyform, 0, passin,
470
		    "signing key file");
471
		if (!key)
472
			goto end;
473
	}
474
	if (infile) {
475
		if (!(in = BIO_new_file(infile, inmode))) {
476
			BIO_printf(bio_err,
477
			    "Can't open input file %s\n", infile);
478
			goto end;
479
		}
480
	} else
481
		in = BIO_new_fp(stdin, BIO_NOCLOSE);
482
483
	if (operation & SMIME_IP) {
484
		if (informat == FORMAT_SMIME)
485
			p7 = SMIME_read_PKCS7(in, &indata);
486
		else if (informat == FORMAT_PEM)
487
			p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
488
		else if (informat == FORMAT_ASN1)
489
			p7 = d2i_PKCS7_bio(in, NULL);
490
		else {
491
			BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
492
			goto end;
493
		}
494
495
		if (!p7) {
496
			BIO_printf(bio_err, "Error reading S/MIME message\n");
497
			goto end;
498
		}
499
		if (contfile) {
500
			BIO_free(indata);
501
			if (!(indata = BIO_new_file(contfile, "rb"))) {
502
				BIO_printf(bio_err, "Can't read content file %s\n", contfile);
503
				goto end;
504
			}
505
		}
506
	}
507
	if (outfile) {
508
		if (!(out = BIO_new_file(outfile, outmode))) {
509
			BIO_printf(bio_err,
510
			    "Can't open output file %s\n", outfile);
511
			goto end;
512
		}
513
	} else {
514
		out = BIO_new_fp(stdout, BIO_NOCLOSE);
515
	}
516
517
	if (operation == SMIME_VERIFY) {
518
		if (!(store = setup_verify(bio_err, CAfile, CApath)))
519
			goto end;
520
		X509_STORE_set_verify_cb(store, smime_cb);
521
		if (vpm)
522
			X509_STORE_set1_param(store, vpm);
523
	}
524
	ret = 3;
525
526
	if (operation == SMIME_ENCRYPT) {
527
		if (indef)
528
			flags |= PKCS7_STREAM;
529
		p7 = PKCS7_encrypt(encerts, in, cipher, flags);
530
	} else if (operation & SMIME_SIGNERS) {
531
		int i;
532
		/*
533
		 * If detached data content we only enable streaming if
534
		 * S/MIME output format.
535
		 */
536
		if (operation == SMIME_SIGN) {
537
			if (flags & PKCS7_DETACHED) {
538
				if (outformat == FORMAT_SMIME)
539
					flags |= PKCS7_STREAM;
540
			} else if (indef)
541
				flags |= PKCS7_STREAM;
542
			flags |= PKCS7_PARTIAL;
543
			p7 = PKCS7_sign(NULL, NULL, other, in, flags);
544
			if (!p7)
545
				goto end;
546
		} else
547
			flags |= PKCS7_REUSE_DIGEST;
548
		for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
549
			signerfile = sk_OPENSSL_STRING_value(sksigners, i);
550
			keyfile = sk_OPENSSL_STRING_value(skkeys, i);
551
			signer = load_cert(bio_err, signerfile, FORMAT_PEM, NULL,
552
			    "signer certificate");
553
			if (!signer)
554
				goto end;
555
			key = load_key(bio_err, keyfile, keyform, 0, passin,
556
			    "signing key file");
557
			if (!key)
558
				goto end;
559
			if (!PKCS7_sign_add_signer(p7, signer, key,
560
				sign_md, flags))
561
				goto end;
562
			X509_free(signer);
563
			signer = NULL;
564
			EVP_PKEY_free(key);
565
			key = NULL;
566
		}
567
		/* If not streaming or resigning finalize structure */
568
		if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) {
569
			if (!PKCS7_final(p7, in, flags))
570
				goto end;
571
		}
572
	}
573
	if (!p7) {
574
		BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
575
		goto end;
576
	}
577
	ret = 4;
578
	if (operation == SMIME_DECRYPT) {
579
		if (!PKCS7_decrypt(p7, key, recip, out, flags)) {
580
			BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
581
			goto end;
582
		}
583
	} else if (operation == SMIME_VERIFY) {
584
		STACK_OF(X509) * signers;
585
		if (PKCS7_verify(p7, other, store, indata, out, flags))
586
			BIO_printf(bio_err, "Verification successful\n");
587
		else {
588
			BIO_printf(bio_err, "Verification failure\n");
589
			goto end;
590
		}
591
		signers = PKCS7_get0_signers(p7, other, flags);
592
		if (!save_certs(signerfile, signers)) {
593
			BIO_printf(bio_err, "Error writing signers to %s\n",
594
			    signerfile);
595
			ret = 5;
596
			goto end;
597
		}
598
		sk_X509_free(signers);
599
	} else if (operation == SMIME_PK7OUT)
600
		PEM_write_bio_PKCS7(out, p7);
601
	else {
602
		if (to)
603
			BIO_printf(out, "To: %s\n", to);
604
		if (from)
605
			BIO_printf(out, "From: %s\n", from);
606
		if (subject)
607
			BIO_printf(out, "Subject: %s\n", subject);
608
		if (outformat == FORMAT_SMIME) {
609
			if (operation == SMIME_RESIGN)
610
				SMIME_write_PKCS7(out, p7, indata, flags);
611
			else
612
				SMIME_write_PKCS7(out, p7, in, flags);
613
		} else if (outformat == FORMAT_PEM)
614
			PEM_write_bio_PKCS7_stream(out, p7, in, flags);
615
		else if (outformat == FORMAT_ASN1)
616
			i2d_PKCS7_bio_stream(out, p7, in, flags);
617
		else {
618
			BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
619
			goto end;
620
		}
621
	}
622
	ret = 0;
623
end:
624
	if (ret)
625
		ERR_print_errors(bio_err);
626
	sk_X509_pop_free(encerts, X509_free);
627
	sk_X509_pop_free(other, X509_free);
628
	if (vpm)
629
		X509_VERIFY_PARAM_free(vpm);
630
	if (sksigners)
631
		sk_OPENSSL_STRING_free(sksigners);
632
	if (skkeys)
633
		sk_OPENSSL_STRING_free(skkeys);
634
	X509_STORE_free(store);
635
	X509_free(cert);
636
	X509_free(recip);
637
	X509_free(signer);
638
	EVP_PKEY_free(key);
639
	PKCS7_free(p7);
640
	BIO_free(in);
641
	BIO_free(indata);
642
	BIO_free_all(out);
643
	free(passin);
644
645
	return (ret);
646
}
647
648
static int
649
save_certs(char *signerfile, STACK_OF(X509) * signers)
650
{
651
	int i;
652
	BIO *tmp;
653
	if (!signerfile)
654
		return 1;
655
	tmp = BIO_new_file(signerfile, "w");
656
	if (!tmp)
657
		return 0;
658
	for (i = 0; i < sk_X509_num(signers); i++)
659
		PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
660
	BIO_free(tmp);
661
	return 1;
662
}
663
664
665
/* Minimal callback just to output policy info (if any) */
666
667
static int
668
smime_cb(int ok, X509_STORE_CTX * ctx)
669
{
670
	int error;
671
672
	error = X509_STORE_CTX_get_error(ctx);
673
674
	if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
675
	    && ((error != X509_V_OK) || (ok != 2)))
676
		return ok;
677
678
	policies_print(NULL, ctx);
679
680
	return ok;
681
682
}