1 /*
2 * Copyright 1999-2025 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /* S/MIME utility function */
11
12 #include <stdio.h>
13 #include <string.h>
14 #include "apps.h"
15 #include "progs.h"
16 #include <openssl/crypto.h>
17 #include <openssl/pem.h>
18 #include <openssl/err.h>
19 #include <openssl/x509_vfy.h>
20 #include <openssl/x509v3.h>
21
22 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
23 static int smime_cb(int ok, X509_STORE_CTX *ctx);
24
25 #define SMIME_OP 0x10
26 #define SMIME_IP 0x20
27 #define SMIME_SIGNERS 0x40
28 #define SMIME_ENCRYPT (1 | SMIME_OP)
29 #define SMIME_DECRYPT (2 | SMIME_IP)
30 #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
31 #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
32 #define SMIME_VERIFY (4 | SMIME_IP)
33 #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
34
35 typedef enum OPTION_choice {
36 OPT_COMMON,
37 OPT_ENCRYPT,
38 OPT_DECRYPT,
39 OPT_SIGN,
40 OPT_RESIGN,
41 OPT_VERIFY,
42 OPT_PK7OUT,
43 OPT_TEXT,
44 OPT_NOINTERN,
45 OPT_NOVERIFY,
46 OPT_NOCHAIN,
47 OPT_NOCERTS,
48 OPT_NOATTR,
49 OPT_NODETACH,
50 OPT_NOSMIMECAP,
51 OPT_BINARY,
52 OPT_NOSIGS,
53 OPT_STREAM,
54 OPT_INDEF,
55 OPT_NOINDEF,
56 OPT_CRLFEOL,
57 OPT_ENGINE,
58 OPT_PASSIN,
59 OPT_TO,
60 OPT_FROM,
61 OPT_SUBJECT,
62 OPT_SIGNER,
63 OPT_RECIP,
64 OPT_MD,
65 OPT_CIPHER,
66 OPT_INKEY,
67 OPT_KEYFORM,
68 OPT_CERTFILE,
69 OPT_CAFILE,
70 OPT_CAPATH,
71 OPT_CASTORE,
72 OPT_NOCAFILE,
73 OPT_NOCAPATH,
74 OPT_NOCASTORE,
75 OPT_R_ENUM,
76 OPT_PROV_ENUM,
77 OPT_CONFIG,
78 OPT_V_ENUM,
79 OPT_IN,
80 OPT_INFORM,
81 OPT_OUT,
82 OPT_OUTFORM,
83 OPT_CONTENT
84 } OPTION_CHOICE;
85
86 const OPTIONS smime_options[] = {
87 { OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n" },
88
89 OPT_SECTION("General"),
90 { "help", OPT_HELP, '-', "Display this summary" },
91 { "in", OPT_IN, '<', "Input file" },
92 { "inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER" },
93 { "out", OPT_OUT, '>', "Output file" },
94 { "outform", OPT_OUTFORM, 'c',
95 "Output format SMIME (default), PEM or DER" },
96 { "inkey", OPT_INKEY, 's',
97 "Input private key (if not signer or recipient)" },
98 { "keyform", OPT_KEYFORM, 'f', "Input private key format (ENGINE, other values ignored)" },
99 #ifndef OPENSSL_NO_ENGINE
100 { "engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device" },
101 #endif
102 { "stream", OPT_STREAM, '-', "Enable CMS streaming" },
103 { "indef", OPT_INDEF, '-', "Same as -stream" },
104 { "noindef", OPT_NOINDEF, '-', "Disable CMS streaming" },
105 OPT_CONFIG_OPTION,
106
107 OPT_SECTION("Action"),
108 { "encrypt", OPT_ENCRYPT, '-', "Encrypt message" },
109 { "decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message" },
110 { "sign", OPT_SIGN, '-', "Sign message" },
111 { "resign", OPT_RESIGN, '-', "Resign a signed message" },
112 { "verify", OPT_VERIFY, '-', "Verify signed message" },
113 { "pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure" },
114
115 OPT_SECTION("Signing/Encryption"),
116 { "passin", OPT_PASSIN, 's', "Input file pass phrase source" },
117 { "md", OPT_MD, 's', "Digest algorithm to use when signing or resigning" },
118 { "", OPT_CIPHER, '-', "Any supported cipher" },
119 { "nointern", OPT_NOINTERN, '-',
120 "Don't search certificates in message for signer" },
121 { "nodetach", OPT_NODETACH, '-', "Use opaque signing" },
122 { "noattr", OPT_NOATTR, '-', "Don't include any signed attributes" },
123 { "binary", OPT_BINARY, '-', "Don't translate message to text" },
124 { "signer", OPT_SIGNER, 's', "Signer certificate file" },
125 { "content", OPT_CONTENT, '<',
126 "Supply or override content for detached signature" },
127 { "nocerts", OPT_NOCERTS, '-',
128 "Don't include signers certificate when signing" },
129
130 OPT_SECTION("Verification/Decryption"),
131 { "nosigs", OPT_NOSIGS, '-', "Don't verify message signature" },
132 { "noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate" },
133
134 { "certfile", OPT_CERTFILE, '<',
135 "Extra signer and intermediate CA certificates to include when signing" },
136 { OPT_MORE_STR, 0, 0,
137 "or to use as preferred signer certs and for chain building when verifying" },
138 { "recip", OPT_RECIP, '<', "Recipient certificate file for decryption" },
139
140 OPT_SECTION("Email"),
141 { "to", OPT_TO, 's', "To address" },
142 { "from", OPT_FROM, 's', "From address" },
143 { "subject", OPT_SUBJECT, 's', "Subject" },
144 { "text", OPT_TEXT, '-', "Include or delete text MIME headers" },
145 { "nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute" },
146
147 OPT_SECTION("Certificate chain"),
148 { "CApath", OPT_CAPATH, '/', "Trusted certificates directory" },
149 { "CAfile", OPT_CAFILE, '<', "Trusted certificates file" },
150 { "CAstore", OPT_CASTORE, ':', "Trusted certificates store URI" },
151 { "no-CAfile", OPT_NOCAFILE, '-',
152 "Do not load the default certificates file" },
153 { "no-CApath", OPT_NOCAPATH, '-',
154 "Do not load certificates from the default certificates directory" },
155 { "no-CAstore", OPT_NOCASTORE, '-',
156 "Do not load certificates from the default certificates store" },
157 { "nochain", OPT_NOCHAIN, '-',
158 "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" },
159 { "crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of LF only" },
160
161 OPT_R_OPTIONS,
162 OPT_V_OPTIONS,
163 OPT_PROV_OPTIONS,
164
165 OPT_PARAMETERS(),
166 { "cert", 0, 0, "Recipient certs, used when encrypting" },
167 { NULL }
168 };
169
operation_name(int operation)170 static const char *operation_name(int operation)
171 {
172 switch (operation) {
173 case SMIME_ENCRYPT:
174 return "encrypt";
175 case SMIME_DECRYPT:
176 return "decrypt";
177 case SMIME_SIGN:
178 return "sign";
179 case SMIME_RESIGN:
180 return "resign";
181 case SMIME_VERIFY:
182 return "verify";
183 case SMIME_PK7OUT:
184 return "pk7out";
185 default:
186 return "(invalid operation)";
187 }
188 }
189
190 #define SET_OPERATION(op) \
191 ((operation != 0 && (operation != (op))) \
192 ? 0 * BIO_printf(bio_err, "%s: Cannot use -%s together with -%s\n", prog, operation_name(op), operation_name(operation)) \
193 : (operation = (op)))
194
smime_main(int argc,char ** argv)195 int smime_main(int argc, char **argv)
196 {
197 CONF *conf = NULL;
198 BIO *in = NULL, *out = NULL, *indata = NULL;
199 EVP_PKEY *key = NULL;
200 PKCS7 *p7 = NULL;
201 STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
202 STACK_OF(X509) *encerts = NULL, *other = NULL;
203 X509 *cert = NULL, *recip = NULL, *signer = NULL;
204 X509_STORE *store = NULL;
205 X509_VERIFY_PARAM *vpm = NULL;
206 EVP_CIPHER *cipher = NULL;
207 EVP_MD *sign_md = NULL;
208 const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL, *prog = NULL;
209 char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
210 char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile = NULL;
211 char *passinarg = NULL, *passin = NULL, *to = NULL, *from = NULL;
212 char *subject = NULL, *digestname = NULL, *ciphername = NULL;
213 OPTION_CHOICE o;
214 int noCApath = 0, noCAfile = 0, noCAstore = 0;
215 int flags = PKCS7_DETACHED, operation = 0, ret = 0, indef = 0;
216 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform = FORMAT_UNDEF;
217 int vpmtouched = 0, rv = 0;
218 ENGINE *e = NULL;
219 const char *mime_eol = "\n";
220 OSSL_LIB_CTX *libctx = app_get0_libctx();
221
222 if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
223 return 1;
224
225 opt_set_unknown_name("cipher");
226 prog = opt_init(argc, argv, smime_options);
227 while ((o = opt_next()) != OPT_EOF) {
228 switch (o) {
229 case OPT_EOF:
230 case OPT_ERR:
231 opthelp:
232 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
233 goto end;
234 case OPT_HELP:
235 opt_help(smime_options);
236 ret = 0;
237 goto end;
238 case OPT_INFORM:
239 if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat))
240 goto opthelp;
241 break;
242 case OPT_IN:
243 infile = opt_arg();
244 break;
245 case OPT_OUTFORM:
246 if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat))
247 goto opthelp;
248 break;
249 case OPT_OUT:
250 outfile = opt_arg();
251 break;
252 case OPT_ENCRYPT:
253 if (!SET_OPERATION(SMIME_ENCRYPT))
254 goto end;
255 break;
256 case OPT_DECRYPT:
257 if (!SET_OPERATION(SMIME_DECRYPT))
258 goto end;
259 break;
260 case OPT_SIGN:
261 if (!SET_OPERATION(SMIME_SIGN))
262 goto end;
263 break;
264 case OPT_RESIGN:
265 if (!SET_OPERATION(SMIME_RESIGN))
266 goto end;
267 break;
268 case OPT_VERIFY:
269 if (!SET_OPERATION(SMIME_VERIFY))
270 goto end;
271 break;
272 case OPT_PK7OUT:
273 if (!SET_OPERATION(SMIME_PK7OUT))
274 goto end;
275 break;
276 case OPT_TEXT:
277 flags |= PKCS7_TEXT;
278 break;
279 case OPT_NOINTERN:
280 flags |= PKCS7_NOINTERN;
281 break;
282 case OPT_NOVERIFY:
283 flags |= PKCS7_NOVERIFY;
284 break;
285 case OPT_NOCHAIN:
286 flags |= PKCS7_NOCHAIN;
287 break;
288 case OPT_NOCERTS:
289 flags |= PKCS7_NOCERTS;
290 break;
291 case OPT_NOATTR:
292 flags |= PKCS7_NOATTR;
293 break;
294 case OPT_NODETACH:
295 flags &= ~PKCS7_DETACHED;
296 break;
297 case OPT_NOSMIMECAP:
298 flags |= PKCS7_NOSMIMECAP;
299 break;
300 case OPT_BINARY:
301 flags |= PKCS7_BINARY;
302 break;
303 case OPT_NOSIGS:
304 flags |= PKCS7_NOSIGS;
305 break;
306 case OPT_STREAM:
307 case OPT_INDEF:
308 indef = 1;
309 break;
310 case OPT_NOINDEF:
311 indef = 0;
312 break;
313 case OPT_CRLFEOL:
314 flags |= PKCS7_CRLFEOL;
315 mime_eol = "\r\n";
316 break;
317 case OPT_R_CASES:
318 if (!opt_rand(o))
319 goto end;
320 break;
321 case OPT_PROV_CASES:
322 if (!opt_provider(o))
323 goto end;
324 break;
325 case OPT_CONFIG:
326 conf = app_load_config_modules(opt_arg());
327 if (conf == NULL)
328 goto end;
329 break;
330 case OPT_ENGINE:
331 e = setup_engine(opt_arg(), 0);
332 break;
333 case OPT_PASSIN:
334 passinarg = opt_arg();
335 break;
336 case OPT_TO:
337 to = opt_arg();
338 break;
339 case OPT_FROM:
340 from = opt_arg();
341 break;
342 case OPT_SUBJECT:
343 subject = opt_arg();
344 break;
345 case OPT_SIGNER:
346 /* If previous -signer argument add signer to list */
347 if (signerfile != NULL) {
348 if (sksigners == NULL
349 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
350 goto end;
351 if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
352 goto end;
353 if (keyfile == NULL)
354 keyfile = signerfile;
355 if (skkeys == NULL
356 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
357 goto end;
358 if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
359 goto end;
360 keyfile = NULL;
361 }
362 signerfile = opt_arg();
363 break;
364 case OPT_RECIP:
365 recipfile = opt_arg();
366 break;
367 case OPT_MD:
368 digestname = opt_arg();
369 break;
370 case OPT_CIPHER:
371 ciphername = opt_unknown();
372 break;
373 case OPT_INKEY:
374 /* If previous -inkey argument add signer to list */
375 if (keyfile != NULL) {
376 if (signerfile == NULL) {
377 BIO_printf(bio_err,
378 "%s: Must have -signer before -inkey\n", prog);
379 goto opthelp;
380 }
381 if (sksigners == NULL
382 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
383 goto end;
384 if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
385 goto end;
386 signerfile = NULL;
387 if (skkeys == NULL
388 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
389 goto end;
390 if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
391 goto end;
392 }
393 keyfile = opt_arg();
394 break;
395 case OPT_KEYFORM:
396 if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
397 goto opthelp;
398 break;
399 case OPT_CERTFILE:
400 certfile = opt_arg();
401 break;
402 case OPT_CAFILE:
403 CAfile = opt_arg();
404 break;
405 case OPT_CAPATH:
406 CApath = opt_arg();
407 break;
408 case OPT_CASTORE:
409 CAstore = opt_arg();
410 break;
411 case OPT_NOCAFILE:
412 noCAfile = 1;
413 break;
414 case OPT_NOCAPATH:
415 noCApath = 1;
416 break;
417 case OPT_NOCASTORE:
418 noCAstore = 1;
419 break;
420 case OPT_CONTENT:
421 contfile = opt_arg();
422 break;
423 case OPT_V_CASES:
424 if (!opt_verify(o, vpm))
425 goto opthelp;
426 vpmtouched++;
427 break;
428 }
429 }
430
431 /* Extra arguments are files with recipient keys. */
432 argc = opt_num_rest();
433 argv = opt_rest();
434
435 if (!app_RAND_load())
436 goto end;
437
438 if (digestname != NULL) {
439 if (!opt_md(digestname, &sign_md))
440 goto opthelp;
441 }
442 if (!opt_cipher_any(ciphername, &cipher))
443 goto opthelp;
444 if (!(operation & SMIME_SIGNERS) && (skkeys != NULL || sksigners != NULL)) {
445 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
446 goto opthelp;
447 }
448 if (!operation) {
449 BIO_puts(bio_err,
450 "No operation (-encrypt|-sign|...) specified\n");
451 goto opthelp;
452 }
453
454 if (operation & SMIME_SIGNERS) {
455 /* Check to see if any final signer needs to be appended */
456 if (keyfile && !signerfile) {
457 BIO_puts(bio_err, "Illegal -inkey without -signer\n");
458 goto opthelp;
459 }
460 if (signerfile != NULL) {
461 if (sksigners == NULL
462 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
463 goto end;
464 if (sk_OPENSSL_STRING_push(sksigners, signerfile) <= 0)
465 goto end;
466 if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
467 goto end;
468 if (!keyfile)
469 keyfile = signerfile;
470 if (sk_OPENSSL_STRING_push(skkeys, keyfile) <= 0)
471 goto end;
472 }
473 if (sksigners == NULL) {
474 BIO_printf(bio_err, "No signer certificate specified\n");
475 goto opthelp;
476 }
477 signerfile = NULL;
478 keyfile = NULL;
479 } else if (operation == SMIME_DECRYPT) {
480 if (recipfile == NULL && keyfile == NULL) {
481 BIO_printf(bio_err,
482 "No recipient certificate or key specified\n");
483 goto opthelp;
484 }
485 } else if (operation == SMIME_ENCRYPT) {
486 if (argc == 0) {
487 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
488 goto opthelp;
489 }
490 }
491
492 if (!app_passwd(passinarg, NULL, &passin, NULL)) {
493 BIO_printf(bio_err, "Error getting password\n");
494 goto end;
495 }
496
497 ret = 2;
498
499 if (!(operation & SMIME_SIGNERS))
500 flags &= ~PKCS7_DETACHED;
501
502 if (!(operation & SMIME_OP)) {
503 if (flags & PKCS7_BINARY)
504 outformat = FORMAT_BINARY;
505 }
506
507 if (!(operation & SMIME_IP)) {
508 if (flags & PKCS7_BINARY)
509 informat = FORMAT_BINARY;
510 }
511
512 if (operation == SMIME_ENCRYPT) {
513 if (cipher == NULL)
514 cipher = (EVP_CIPHER *)EVP_aes_256_cbc();
515 encerts = sk_X509_new_null();
516 if (encerts == NULL)
517 goto end;
518 while (*argv != NULL) {
519 cert = load_cert(*argv, FORMAT_UNDEF,
520 "recipient certificate file");
521 if (cert == NULL)
522 goto end;
523 if (!sk_X509_push(encerts, cert))
524 goto end;
525 cert = NULL;
526 argv++;
527 }
528 }
529
530 if (certfile != NULL) {
531 if (!load_certs(certfile, 0, &other, NULL, "certificates")) {
532 ERR_print_errors(bio_err);
533 goto end;
534 }
535 }
536
537 if (recipfile != NULL && (operation == SMIME_DECRYPT)) {
538 if ((recip = load_cert(recipfile, FORMAT_UNDEF,
539 "recipient certificate file"))
540 == NULL) {
541 ERR_print_errors(bio_err);
542 goto end;
543 }
544 }
545
546 if (operation == SMIME_DECRYPT) {
547 if (keyfile == NULL)
548 keyfile = recipfile;
549 } else if (operation == SMIME_SIGN) {
550 if (keyfile == NULL)
551 keyfile = signerfile;
552 } else {
553 keyfile = NULL;
554 }
555
556 if (keyfile != NULL) {
557 key = load_key(keyfile, keyform, 0, passin, e, "signing key");
558 if (key == NULL)
559 goto end;
560 }
561
562 in = bio_open_default(infile, 'r', informat);
563 if (in == NULL)
564 goto end;
565
566 if (operation & SMIME_IP) {
567 PKCS7 *p7_in = NULL;
568
569 p7 = PKCS7_new_ex(libctx, app_get0_propq());
570 if (p7 == NULL) {
571 BIO_printf(bio_err, "Error allocating PKCS7 object\n");
572 goto end;
573 }
574 if (informat == FORMAT_SMIME) {
575 p7_in = SMIME_read_PKCS7_ex(in, &indata, &p7);
576 } else if (informat == FORMAT_PEM) {
577 p7_in = PEM_read_bio_PKCS7(in, &p7, NULL, NULL);
578 } else if (informat == FORMAT_ASN1) {
579 p7_in = d2i_PKCS7_bio(in, &p7);
580 } else {
581 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
582 goto end;
583 }
584
585 if (p7_in == NULL) {
586 BIO_printf(bio_err, "Error reading S/MIME message\n");
587 goto end;
588 }
589 if (contfile != NULL) {
590 BIO_free(indata);
591 if ((indata = BIO_new_file(contfile, "rb")) == NULL) {
592 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
593 goto end;
594 }
595 }
596 }
597
598 out = bio_open_default(outfile, 'w', outformat);
599 if (out == NULL)
600 goto end;
601
602 if (operation == SMIME_VERIFY) {
603 if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath,
604 CAstore, noCAstore))
605 == NULL)
606 goto end;
607 X509_STORE_set_verify_cb(store, smime_cb);
608 if (vpmtouched)
609 X509_STORE_set1_param(store, vpm);
610 }
611
612 ret = 3;
613
614 if (operation == SMIME_ENCRYPT) {
615 if (indef)
616 flags |= PKCS7_STREAM;
617 p7 = PKCS7_encrypt_ex(encerts, in, cipher, flags, libctx, app_get0_propq());
618 } else if (operation & SMIME_SIGNERS) {
619 int i;
620 /*
621 * If detached data content we only enable streaming if S/MIME output
622 * format.
623 */
624 if (operation == SMIME_SIGN) {
625 if (flags & PKCS7_DETACHED) {
626 if (outformat == FORMAT_SMIME)
627 flags |= PKCS7_STREAM;
628 } else if (indef) {
629 flags |= PKCS7_STREAM;
630 }
631 flags |= PKCS7_PARTIAL;
632 p7 = PKCS7_sign_ex(NULL, NULL, other, in, flags, libctx, app_get0_propq());
633 if (p7 == NULL)
634 goto end;
635 if (flags & PKCS7_NOCERTS) {
636 for (i = 0; i < sk_X509_num(other); i++) {
637 X509 *x = sk_X509_value(other, i);
638 PKCS7_add_certificate(p7, x);
639 }
640 }
641 } else {
642 flags |= PKCS7_REUSE_DIGEST;
643 }
644 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
645 signerfile = sk_OPENSSL_STRING_value(sksigners, i);
646 keyfile = sk_OPENSSL_STRING_value(skkeys, i);
647 signer = load_cert(signerfile, FORMAT_UNDEF, "signer certificate");
648 if (signer == NULL)
649 goto end;
650 key = load_key(keyfile, keyform, 0, passin, e, "signing key");
651 if (key == NULL)
652 goto end;
653
654 if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags))
655 goto end;
656 X509_free(signer);
657 signer = NULL;
658 EVP_PKEY_free(key);
659 key = NULL;
660 }
661 /* If not streaming or resigning finalize structure */
662 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) {
663 if (!PKCS7_final(p7, in, flags))
664 goto end;
665 }
666 }
667
668 if (p7 == NULL) {
669 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
670 goto end;
671 }
672
673 ret = 4;
674 if (operation == SMIME_DECRYPT) {
675 if (!PKCS7_decrypt(p7, key, recip, out, flags)) {
676 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
677 goto end;
678 }
679 } else if (operation == SMIME_VERIFY) {
680 STACK_OF(X509) *signers;
681 if (PKCS7_verify(p7, other, store, indata, out, flags))
682 BIO_printf(bio_err, "Verification successful\n");
683 else {
684 BIO_printf(bio_err, "Verification failure\n");
685 goto end;
686 }
687 signers = PKCS7_get0_signers(p7, other, flags);
688 if (!save_certs(signerfile, signers)) {
689 BIO_printf(bio_err, "Error writing signers to %s\n", signerfile);
690 ret = 5;
691 goto end;
692 }
693 sk_X509_free(signers);
694 } else if (operation == SMIME_PK7OUT) {
695 PEM_write_bio_PKCS7(out, p7);
696 } else {
697 if (to)
698 BIO_printf(out, "To: %s%s", to, mime_eol);
699 if (from)
700 BIO_printf(out, "From: %s%s", from, mime_eol);
701 if (subject)
702 BIO_printf(out, "Subject: %s%s", subject, mime_eol);
703 if (outformat == FORMAT_SMIME) {
704 if (operation == SMIME_RESIGN)
705 rv = SMIME_write_PKCS7(out, p7, indata, flags);
706 else
707 rv = SMIME_write_PKCS7(out, p7, in, flags);
708 } else if (outformat == FORMAT_PEM) {
709 rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags);
710 } else if (outformat == FORMAT_ASN1) {
711 rv = i2d_PKCS7_bio_stream(out, p7, in, flags);
712 } else {
713 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
714 goto end;
715 }
716 if (rv == 0) {
717 BIO_printf(bio_err, "Error writing output\n");
718 ret = 3;
719 goto end;
720 }
721 }
722 ret = 0;
723 end:
724 if (ret)
725 ERR_print_errors(bio_err);
726 OSSL_STACK_OF_X509_free(encerts);
727 OSSL_STACK_OF_X509_free(other);
728 X509_VERIFY_PARAM_free(vpm);
729 sk_OPENSSL_STRING_free(sksigners);
730 sk_OPENSSL_STRING_free(skkeys);
731 X509_STORE_free(store);
732 X509_free(cert);
733 X509_free(recip);
734 X509_free(signer);
735 EVP_PKEY_free(key);
736 EVP_MD_free(sign_md);
737 EVP_CIPHER_free(cipher);
738 PKCS7_free(p7);
739 release_engine(e);
740 BIO_free(in);
741 BIO_free(indata);
742 BIO_free_all(out);
743 OPENSSL_free(passin);
744 NCONF_free(conf);
745 return ret;
746 }
747
save_certs(char * signerfile,STACK_OF (X509)* signers)748 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
749 {
750 int i;
751 BIO *tmp;
752
753 if (signerfile == NULL)
754 return 1;
755 tmp = BIO_new_file(signerfile, "w");
756 if (tmp == NULL)
757 return 0;
758 for (i = 0; i < sk_X509_num(signers); i++)
759 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
760 BIO_free(tmp);
761 return 1;
762 }
763
764 /* Minimal callback just to output policy info (if any) */
765
smime_cb(int ok,X509_STORE_CTX * ctx)766 static int smime_cb(int ok, X509_STORE_CTX *ctx)
767 {
768 int error;
769
770 error = X509_STORE_CTX_get_error(ctx);
771
772 if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
773 && ((error != X509_V_OK) || (ok != 2)))
774 return ok;
775
776 policies_print(ctx);
777
778 return ok;
779 }
780