Import of openssl-0.9.8, a feature release.
[dragonfly.git] / crypto / openssl-0.9 / apps / smime.c
1 /* smime.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 #include "apps.h"
64 #include <openssl/crypto.h>
65 #include <openssl/pem.h>
66 #include <openssl/err.h>
67 #include <openssl/x509_vfy.h>
68 #include <openssl/x509v3.h>
69
70 #undef PROG
71 #define PROG smime_main
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_ENCRYPT   (1 | SMIME_OP)
77 #define SMIME_DECRYPT   2
78 #define SMIME_SIGN      (3 | SMIME_OP)
79 #define SMIME_VERIFY    4
80 #define SMIME_PK7OUT    5
81
82 int MAIN(int, char **);
83
84 int MAIN(int argc, char **argv)
85         {
86         ENGINE *e = NULL;
87         int operation = 0;
88         int ret = 0;
89         char **args;
90         const char *inmode = "r", *outmode = "w";
91         char *infile = NULL, *outfile = NULL;
92         char *signerfile = NULL, *recipfile = NULL;
93         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
94         const EVP_CIPHER *cipher = NULL;
95         PKCS7 *p7 = NULL;
96         X509_STORE *store = NULL;
97         X509 *cert = NULL, *recip = NULL, *signer = NULL;
98         EVP_PKEY *key = NULL;
99         STACK_OF(X509) *encerts = NULL, *other = NULL;
100         BIO *in = NULL, *out = NULL, *indata = NULL;
101         int badarg = 0;
102         int flags = PKCS7_DETACHED;
103         char *to = NULL, *from = NULL, *subject = NULL;
104         char *CAfile = NULL, *CApath = NULL;
105         char *passargin = NULL, *passin = NULL;
106         char *inrand = NULL;
107         int need_rand = 0;
108         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
109         int keyform = FORMAT_PEM;
110 #ifndef OPENSSL_NO_ENGINE
111         char *engine=NULL;
112 #endif
113
114         X509_VERIFY_PARAM *vpm = NULL;
115
116         args = argv + 1;
117         ret = 1;
118
119         apps_startup();
120
121         if (bio_err == NULL)
122                 {
123                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
124                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
125                 }
126
127         if (!load_config(bio_err, NULL))
128                 goto end;
129
130         while (!badarg && *args && *args[0] == '-')
131                 {
132                 if (!strcmp (*args, "-encrypt"))
133                         operation = SMIME_ENCRYPT;
134                 else if (!strcmp (*args, "-decrypt"))
135                         operation = SMIME_DECRYPT;
136                 else if (!strcmp (*args, "-sign"))
137                         operation = SMIME_SIGN;
138                 else if (!strcmp (*args, "-verify"))
139                         operation = SMIME_VERIFY;
140                 else if (!strcmp (*args, "-pk7out"))
141                         operation = SMIME_PK7OUT;
142 #ifndef OPENSSL_NO_DES
143                 else if (!strcmp (*args, "-des3")) 
144                                 cipher = EVP_des_ede3_cbc();
145                 else if (!strcmp (*args, "-des")) 
146                                 cipher = EVP_des_cbc();
147 #endif
148 #ifndef OPENSSL_NO_RC2
149                 else if (!strcmp (*args, "-rc2-40")) 
150                                 cipher = EVP_rc2_40_cbc();
151                 else if (!strcmp (*args, "-rc2-128")) 
152                                 cipher = EVP_rc2_cbc();
153                 else if (!strcmp (*args, "-rc2-64")) 
154                                 cipher = EVP_rc2_64_cbc();
155 #endif
156 #ifndef OPENSSL_NO_AES
157                 else if (!strcmp(*args,"-aes128"))
158                                 cipher = EVP_aes_128_cbc();
159                 else if (!strcmp(*args,"-aes192"))
160                                 cipher = EVP_aes_192_cbc();
161                 else if (!strcmp(*args,"-aes256"))
162                                 cipher = EVP_aes_256_cbc();
163 #endif
164                 else if (!strcmp (*args, "-text")) 
165                                 flags |= PKCS7_TEXT;
166                 else if (!strcmp (*args, "-nointern")) 
167                                 flags |= PKCS7_NOINTERN;
168                 else if (!strcmp (*args, "-noverify")) 
169                                 flags |= PKCS7_NOVERIFY;
170                 else if (!strcmp (*args, "-nochain")) 
171                                 flags |= PKCS7_NOCHAIN;
172                 else if (!strcmp (*args, "-nocerts")) 
173                                 flags |= PKCS7_NOCERTS;
174                 else if (!strcmp (*args, "-noattr")) 
175                                 flags |= PKCS7_NOATTR;
176                 else if (!strcmp (*args, "-nodetach")) 
177                                 flags &= ~PKCS7_DETACHED;
178                 else if (!strcmp (*args, "-nosmimecap"))
179                                 flags |= PKCS7_NOSMIMECAP;
180                 else if (!strcmp (*args, "-binary"))
181                                 flags |= PKCS7_BINARY;
182                 else if (!strcmp (*args, "-nosigs"))
183                                 flags |= PKCS7_NOSIGS;
184                 else if (!strcmp (*args, "-nooldmime"))
185                                 flags |= PKCS7_NOOLDMIMETYPE;
186                 else if (!strcmp (*args, "-crlfeol"))
187                                 flags |= PKCS7_CRLFEOL;
188                 else if (!strcmp(*args,"-rand"))
189                         {
190                         if (args[1])
191                                 {
192                                 args++;
193                                 inrand = *args;
194                                 }
195                         else
196                                 badarg = 1;
197                         need_rand = 1;
198                         }
199 #ifndef OPENSSL_NO_ENGINE
200                 else if (!strcmp(*args,"-engine"))
201                         {
202                         if (args[1])
203                                 {
204                                 args++;
205                                 engine = *args;
206                                 }
207                         else badarg = 1;
208                         }
209 #endif
210                 else if (!strcmp(*args,"-passin"))
211                         {
212                         if (args[1])
213                                 {
214                                 args++;
215                                 passargin = *args;
216                                 }
217                         else
218                                 badarg = 1;
219                         }
220                 else if (!strcmp (*args, "-to"))
221                         {
222                         if (args[1])
223                                 {
224                                 args++;
225                                 to = *args;
226                                 }
227                         else
228                                 badarg = 1;
229                         }
230                 else if (!strcmp (*args, "-from"))
231                         {
232                         if (args[1])
233                                 {
234                                 args++;
235                                 from = *args;
236                                 }
237                         else badarg = 1;
238                         }
239                 else if (!strcmp (*args, "-subject"))
240                         {
241                         if (args[1])
242                                 {
243                                 args++;
244                                 subject = *args;
245                                 }
246                         else
247                                 badarg = 1;
248                         }
249                 else if (!strcmp (*args, "-signer"))
250                         {
251                         if (args[1])
252                                 {
253                                 args++;
254                                 signerfile = *args;
255                                 }
256                         else
257                                 badarg = 1;
258                         }
259                 else if (!strcmp (*args, "-recip"))
260                         {
261                         if (args[1])
262                                 {
263                                 args++;
264                                 recipfile = *args;
265                                 }
266                         else badarg = 1;
267                         }
268                 else if (!strcmp (*args, "-inkey"))
269                         {
270                         if (args[1])
271                                 {
272                                 args++;
273                                 keyfile = *args;
274                                 }
275                         else
276                                 badarg = 1;
277                 }
278                 else if (!strcmp (*args, "-keyform"))
279                         {
280                         if (args[1])
281                                 {
282                                 args++;
283                                 keyform = str2fmt(*args);
284                                 }
285                         else
286                                 badarg = 1;
287                         }
288                 else if (!strcmp (*args, "-certfile"))
289                         {
290                         if (args[1])
291                                 {
292                                 args++;
293                                 certfile = *args;
294                                 }
295                         else
296                                 badarg = 1;
297                         }
298                 else if (!strcmp (*args, "-CAfile"))
299                         {
300                         if (args[1])
301                                 {
302                                 args++;
303                                 CAfile = *args;
304                                 }
305                         else
306                                 badarg = 1;
307                         }
308                 else if (!strcmp (*args, "-CApath"))
309                         {
310                         if (args[1])
311                                 {
312                                 args++;
313                                 CApath = *args;
314                                 }
315                         else
316                                 badarg = 1;
317                         }
318                 else if (!strcmp (*args, "-in"))
319                         {
320                         if (args[1])
321                                 {
322                                 args++;
323                                 infile = *args;
324                                 }
325                         else
326                                 badarg = 1;
327                         }
328                 else if (!strcmp (*args, "-inform"))
329                         {
330                         if (args[1])
331                                 {
332                                 args++;
333                                 informat = str2fmt(*args);
334                                 }
335                         else
336                                 badarg = 1;
337                         }
338                 else if (!strcmp (*args, "-outform"))
339                         {
340                         if (args[1])
341                                 {
342                                 args++;
343                                 outformat = str2fmt(*args);
344                                 }
345                         else
346                                 badarg = 1;
347                         }
348                 else if (!strcmp (*args, "-out"))
349                         {
350                         if (args[1])
351                                 {
352                                 args++;
353                                 outfile = *args;
354                                 }
355                         else
356                                 badarg = 1;
357                         }
358                 else if (!strcmp (*args, "-content"))
359                         {
360                         if (args[1])
361                                 {
362                                 args++;
363                                 contfile = *args;
364                                 }
365                         else
366                                 badarg = 1;
367                         }
368                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
369                         continue;
370                 else
371                         badarg = 1;
372                 args++;
373                 }
374
375
376         if (operation == SMIME_SIGN)
377                 {
378                 if (!signerfile)
379                         {
380                         BIO_printf(bio_err, "No signer certificate specified\n");
381                         badarg = 1;
382                         }
383                 need_rand = 1;
384                 }
385         else if (operation == SMIME_DECRYPT)
386                 {
387                 if (!recipfile)
388                         {
389                         BIO_printf(bio_err, "No recipient certificate and key specified\n");
390                         badarg = 1;
391                         }
392                 }
393         else if (operation == SMIME_ENCRYPT)
394                 {
395                 if (!*args)
396                         {
397                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
398                         badarg = 1;
399                         }
400                 need_rand = 1;
401                 }
402         else if (!operation)
403                 badarg = 1;
404
405         if (badarg)
406                 {
407                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
408                 BIO_printf (bio_err, "where options are\n");
409                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
410                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
411                 BIO_printf (bio_err, "-sign          sign message\n");
412                 BIO_printf (bio_err, "-verify        verify signed message\n");
413                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
414 #ifndef OPENSSL_NO_DES
415                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
416                 BIO_printf (bio_err, "-des           encrypt with DES\n");
417 #endif
418 #ifndef OPENSSL_NO_RC2
419                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
420                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
421                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
422 #endif
423 #ifndef OPENSSL_NO_AES
424                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
425                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
426 #endif
427                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
428                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
429                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
430                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
431                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
432                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
433                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
434                 BIO_printf (bio_err, "-certfile file other certificates file\n");
435                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
436                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
437                 BIO_printf (bio_err, "-in file       input file\n");
438                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
439                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
440                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
441                 BIO_printf (bio_err, "-out file      output file\n");
442                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
443                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
444                 BIO_printf (bio_err, "-to addr       to address\n");
445                 BIO_printf (bio_err, "-from ad       from address\n");
446                 BIO_printf (bio_err, "-subject s     subject\n");
447                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
448                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
449                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
450                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
451                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
452 #ifndef OPENSSL_NO_ENGINE
453                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
454 #endif
455                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
456                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
457                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
458                 BIO_printf(bio_err,  "               the random number generator\n");
459                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
460                 goto end;
461                 }
462
463 #ifndef OPENSSL_NO_ENGINE
464         e = setup_engine(bio_err, engine, 0);
465 #endif
466
467         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
468                 {
469                 BIO_printf(bio_err, "Error getting password\n");
470                 goto end;
471                 }
472
473         if (need_rand)
474                 {
475                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
476                 if (inrand != NULL)
477                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
478                                 app_RAND_load_files(inrand));
479                 }
480
481         ret = 2;
482
483         if (operation != SMIME_SIGN)
484                 flags &= ~PKCS7_DETACHED;
485
486         if (operation & SMIME_OP)
487                 {
488                 if (flags & PKCS7_BINARY)
489                         inmode = "rb";
490                 if (outformat == FORMAT_ASN1)
491                         outmode = "wb";
492                 }
493         else
494                 {
495                 if (flags & PKCS7_BINARY)
496                         outmode = "wb";
497                 if (informat == FORMAT_ASN1)
498                         inmode = "rb";
499                 }
500
501         if (operation == SMIME_ENCRYPT)
502                 {
503                 if (!cipher)
504                         {
505 #ifndef OPENSSL_NO_RC2                  
506                         cipher = EVP_rc2_40_cbc();
507 #else
508                         BIO_printf(bio_err, "No cipher selected\n");
509                         goto end;
510 #endif
511                         }
512                 encerts = sk_X509_new_null();
513                 while (*args)
514                         {
515                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
516                                 NULL, e, "recipient certificate file")))
517                                 {
518 #if 0                           /* An appropriate message is already printed */
519                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
520 #endif
521                                 goto end;
522                                 }
523                         sk_X509_push(encerts, cert);
524                         cert = NULL;
525                         args++;
526                         }
527                 }
528
529         if (signerfile && (operation == SMIME_SIGN))
530                 {
531                 if (!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,
532                         e, "signer certificate")))
533                         {
534 #if 0                   /* An appropri message has already been printed */
535                         BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
536 #endif
537                         goto end;
538                         }
539                 }
540
541         if (certfile)
542                 {
543                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
544                         e, "certificate file")))
545                         {
546 #if 0                   /* An appropriate message has already been printed */
547                         BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
548 #endif
549                         ERR_print_errors(bio_err);
550                         goto end;
551                         }
552                 }
553
554         if (recipfile && (operation == SMIME_DECRYPT))
555                 {
556                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
557                         e, "recipient certificate file")))
558                         {
559 #if 0                   /* An appropriate message has alrady been printed */
560                         BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
561 #endif
562                         ERR_print_errors(bio_err);
563                         goto end;
564                         }
565                 }
566
567         if (operation == SMIME_DECRYPT)
568                 {
569                 if (!keyfile)
570                         keyfile = recipfile;
571                 }
572         else if (operation == SMIME_SIGN)
573                 {
574                 if (!keyfile)
575                         keyfile = signerfile;
576                 }
577         else keyfile = NULL;
578
579         if (keyfile)
580                 {
581                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
582                                "signing key file");
583                 if (!key)
584                         goto end;
585                 }
586
587         if (infile)
588                 {
589                 if (!(in = BIO_new_file(infile, inmode)))
590                         {
591                         BIO_printf (bio_err,
592                                  "Can't open input file %s\n", infile);
593                         goto end;
594                         }
595                 }
596         else
597                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
598
599         if (outfile)
600                 {
601                 if (!(out = BIO_new_file(outfile, outmode)))
602                         {
603                         BIO_printf (bio_err,
604                                  "Can't open output file %s\n", outfile);
605                         goto end;
606                         }
607                 }
608         else
609                 {
610                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
611 #ifdef OPENSSL_SYS_VMS
612                 {
613                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
614                     out = BIO_push(tmpbio, out);
615                 }
616 #endif
617                 }
618
619         if (operation == SMIME_VERIFY)
620                 {
621                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
622                         goto end;
623                 X509_STORE_set_verify_cb_func(store, smime_cb);
624                 if (vpm)
625                         X509_STORE_set1_param(store, vpm);
626                 }
627
628
629         ret = 3;
630
631         if (operation == SMIME_ENCRYPT)
632                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
633         else if (operation == SMIME_SIGN)
634                 {
635                 /* If detached data and SMIME output enable partial
636                  * signing.
637                  */
638                 if ((flags & PKCS7_DETACHED) && (outformat == FORMAT_SMIME))
639                         flags |= PKCS7_STREAM;
640                 p7 = PKCS7_sign(signer, key, other, in, flags);
641                 /* Don't need to rewind for partial signing */
642                 if (!(flags & PKCS7_STREAM) && (BIO_reset(in) != 0))
643                         {
644                         BIO_printf(bio_err, "Can't rewind input file\n");
645                         goto end;
646                         }
647                 }
648         else
649                 {
650                 if (informat == FORMAT_SMIME) 
651                         p7 = SMIME_read_PKCS7(in, &indata);
652                 else if (informat == FORMAT_PEM) 
653                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
654                 else if (informat == FORMAT_ASN1) 
655                         p7 = d2i_PKCS7_bio(in, NULL);
656                 else
657                         {
658                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
659                         goto end;
660                         }
661
662                 if (!p7)
663                         {
664                         BIO_printf(bio_err, "Error reading S/MIME message\n");
665                         goto end;
666                         }
667                 if (contfile)
668                         {
669                         BIO_free(indata);
670                         if (!(indata = BIO_new_file(contfile, "rb")))
671                                 {
672                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
673                                 goto end;
674                                 }
675                         }
676                 }
677
678         if (!p7)
679                 {
680                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
681                 goto end;
682                 }
683
684         ret = 4;
685         if (operation == SMIME_DECRYPT)
686                 {
687                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
688                         {
689                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
690                         goto end;
691                         }
692                 }
693         else if (operation == SMIME_VERIFY)
694                 {
695                 STACK_OF(X509) *signers;
696                 if (PKCS7_verify(p7, other, store, indata, out, flags))
697                         BIO_printf(bio_err, "Verification successful\n");
698                 else
699                         {
700                         BIO_printf(bio_err, "Verification failure\n");
701                         goto end;
702                         }
703                 signers = PKCS7_get0_signers(p7, other, flags);
704                 if (!save_certs(signerfile, signers))
705                         {
706                         BIO_printf(bio_err, "Error writing signers to %s\n",
707                                                                 signerfile);
708                         ret = 5;
709                         goto end;
710                         }
711                 sk_X509_free(signers);
712                 }
713         else if (operation == SMIME_PK7OUT)
714                 PEM_write_bio_PKCS7(out, p7);
715         else
716                 {
717                 if (to)
718                         BIO_printf(out, "To: %s\n", to);
719                 if (from)
720                         BIO_printf(out, "From: %s\n", from);
721                 if (subject)
722                         BIO_printf(out, "Subject: %s\n", subject);
723                 if (outformat == FORMAT_SMIME) 
724                         SMIME_write_PKCS7(out, p7, in, flags);
725                 else if (outformat == FORMAT_PEM) 
726                         PEM_write_bio_PKCS7(out,p7);
727                 else if (outformat == FORMAT_ASN1) 
728                         i2d_PKCS7_bio(out,p7);
729                 else
730                         {
731                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
732                         goto end;
733                         }
734                 }
735         ret = 0;
736 end:
737         if (need_rand)
738                 app_RAND_write_file(NULL, bio_err);
739         if (ret) ERR_print_errors(bio_err);
740         sk_X509_pop_free(encerts, X509_free);
741         sk_X509_pop_free(other, X509_free);
742         if (vpm)
743                 X509_VERIFY_PARAM_free(vpm);
744         X509_STORE_free(store);
745         X509_free(cert);
746         X509_free(recip);
747         X509_free(signer);
748         EVP_PKEY_free(key);
749         PKCS7_free(p7);
750         BIO_free(in);
751         BIO_free(indata);
752         BIO_free_all(out);
753         if (passin) OPENSSL_free(passin);
754         return (ret);
755 }
756
757 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
758         {
759         int i;
760         BIO *tmp;
761         if (!signerfile)
762                 return 1;
763         tmp = BIO_new_file(signerfile, "w");
764         if (!tmp) return 0;
765         for(i = 0; i < sk_X509_num(signers); i++)
766                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
767         BIO_free(tmp);
768         return 1;
769         }
770         
771
772 /* Minimal callback just to output policy info (if any) */
773
774 static int smime_cb(int ok, X509_STORE_CTX *ctx)
775         {
776         int error;
777
778         error = X509_STORE_CTX_get_error(ctx);
779
780         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
781                 && ((error != X509_V_OK) || (ok != 2)))
782                 return ok;
783
784         policies_print(NULL, ctx);
785
786         return ok;
787
788         }