Initialize num properly.
[openssl.git] / apps / smime.c
1 /* smime.c */
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 #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_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 MAIN(int, char **);
86
87 int MAIN(int argc, char **argv)
88         {
89         ENGINE *e = NULL;
90         int operation = 0;
91         int ret = 0;
92         char **args;
93         const char *inmode = "r", *outmode = "w";
94         char *infile = NULL, *outfile = NULL;
95         char *signerfile = NULL, *recipfile = NULL;
96         STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
97         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
98         const EVP_CIPHER *cipher = NULL;
99         PKCS7 *p7 = NULL;
100         X509_STORE *store = NULL;
101         X509 *cert = NULL, *recip = NULL, *signer = NULL;
102         EVP_PKEY *key = NULL;
103         STACK_OF(X509) *encerts = NULL, *other = NULL;
104         BIO *in = NULL, *out = NULL, *indata = NULL;
105         int badarg = 0;
106         int flags = PKCS7_DETACHED;
107         char *to = NULL, *from = NULL, *subject = NULL;
108         char *CAfile = NULL, *CApath = NULL;
109         char *passargin = NULL, *passin = NULL;
110         char *inrand = NULL;
111         int need_rand = 0;
112         int indef = 0;
113         const EVP_MD *sign_md = NULL;
114         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
115         int keyform = FORMAT_PEM;
116 #ifndef OPENSSL_NO_ENGINE
117         char *engine=NULL;
118 #endif
119
120         X509_VERIFY_PARAM *vpm = NULL;
121
122         args = argv + 1;
123         ret = 1;
124
125         apps_startup();
126
127         if (bio_err == NULL)
128                 {
129                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
130                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
131                 }
132
133         if (!load_config(bio_err, NULL))
134                 goto end;
135
136         while (!badarg && *args && *args[0] == '-')
137                 {
138                 if (!strcmp (*args, "-encrypt"))
139                         operation = SMIME_ENCRYPT;
140                 else if (!strcmp (*args, "-decrypt"))
141                         operation = SMIME_DECRYPT;
142                 else if (!strcmp (*args, "-sign"))
143                         operation = SMIME_SIGN;
144                 else if (!strcmp (*args, "-resign"))
145                         operation = SMIME_RESIGN;
146                 else if (!strcmp (*args, "-verify"))
147                         operation = SMIME_VERIFY;
148                 else if (!strcmp (*args, "-pk7out"))
149                         operation = SMIME_PK7OUT;
150 #ifndef OPENSSL_NO_DES
151                 else if (!strcmp (*args, "-des3")) 
152                                 cipher = EVP_des_ede3_cbc();
153                 else if (!strcmp (*args, "-des")) 
154                                 cipher = EVP_des_cbc();
155 #endif
156 #ifndef OPENSSL_NO_SEED
157                 else if (!strcmp (*args, "-seed")) 
158                                 cipher = EVP_seed_cbc();
159 #endif
160 #ifndef OPENSSL_NO_RC2
161                 else if (!strcmp (*args, "-rc2-40")) 
162                                 cipher = EVP_rc2_40_cbc();
163                 else if (!strcmp (*args, "-rc2-128")) 
164                                 cipher = EVP_rc2_cbc();
165                 else if (!strcmp (*args, "-rc2-64")) 
166                                 cipher = EVP_rc2_64_cbc();
167 #endif
168 #ifndef OPENSSL_NO_AES
169                 else if (!strcmp(*args,"-aes128"))
170                                 cipher = EVP_aes_128_cbc();
171                 else if (!strcmp(*args,"-aes192"))
172                                 cipher = EVP_aes_192_cbc();
173                 else if (!strcmp(*args,"-aes256"))
174                                 cipher = EVP_aes_256_cbc();
175 #endif
176 #ifndef OPENSSL_NO_CAMELLIA
177                 else if (!strcmp(*args,"-camellia128"))
178                                 cipher = EVP_camellia_128_cbc();
179                 else if (!strcmp(*args,"-camellia192"))
180                                 cipher = EVP_camellia_192_cbc();
181                 else if (!strcmp(*args,"-camellia256"))
182                                 cipher = EVP_camellia_256_cbc();
183 #endif
184                 else if (!strcmp (*args, "-text")) 
185                                 flags |= PKCS7_TEXT;
186                 else if (!strcmp (*args, "-nointern")) 
187                                 flags |= PKCS7_NOINTERN;
188                 else if (!strcmp (*args, "-noverify")) 
189                                 flags |= PKCS7_NOVERIFY;
190                 else if (!strcmp (*args, "-nochain")) 
191                                 flags |= PKCS7_NOCHAIN;
192                 else if (!strcmp (*args, "-nocerts")) 
193                                 flags |= PKCS7_NOCERTS;
194                 else if (!strcmp (*args, "-noattr")) 
195                                 flags |= PKCS7_NOATTR;
196                 else if (!strcmp (*args, "-nodetach")) 
197                                 flags &= ~PKCS7_DETACHED;
198                 else if (!strcmp (*args, "-nosmimecap"))
199                                 flags |= PKCS7_NOSMIMECAP;
200                 else if (!strcmp (*args, "-binary"))
201                                 flags |= PKCS7_BINARY;
202                 else if (!strcmp (*args, "-nosigs"))
203                                 flags |= PKCS7_NOSIGS;
204                 else if (!strcmp (*args, "-stream"))
205                                 indef = 1;
206                 else if (!strcmp (*args, "-indef"))
207                                 indef = 1;
208                 else if (!strcmp (*args, "-noindef"))
209                                 indef = 0;
210                 else if (!strcmp (*args, "-nooldmime"))
211                                 flags |= PKCS7_NOOLDMIMETYPE;
212                 else if (!strcmp (*args, "-crlfeol"))
213                                 flags |= PKCS7_CRLFEOL;
214                 else if (!strcmp(*args,"-rand"))
215                         {
216                         if (!args[1])
217                                 goto argerr;
218                         args++;
219                         inrand = *args;
220                         need_rand = 1;
221                         }
222 #ifndef OPENSSL_NO_ENGINE
223                 else if (!strcmp(*args,"-engine"))
224                         {
225                         if (!args[1])
226                                 goto argerr;
227                         engine = *++args;
228                         }
229 #endif
230                 else if (!strcmp(*args,"-passin"))
231                         {
232                         if (!args[1])
233                                 goto argerr;
234                         passargin = *++args;
235                         }
236                 else if (!strcmp (*args, "-to"))
237                         {
238                         if (!args[1])
239                                 goto argerr;
240                         to = *++args;
241                         }
242                 else if (!strcmp (*args, "-from"))
243                         {
244                         if (!args[1])
245                                 goto argerr;
246                         from = *++args;
247                         }
248                 else if (!strcmp (*args, "-subject"))
249                         {
250                         if (!args[1])
251                                 goto argerr;
252                         subject = *++args;
253                         }
254                 else if (!strcmp (*args, "-signer"))
255                         {
256                         if (!args[1])
257                                 goto argerr;
258                         /* If previous -signer argument add signer to list */
259
260                         if (signerfile)
261                                 {
262                                 if (!sksigners)
263                                         sksigners = sk_OPENSSL_STRING_new_null();
264                                 sk_OPENSSL_STRING_push(sksigners, signerfile);
265                                 if (!keyfile)
266                                         keyfile = signerfile;
267                                 if (!skkeys)
268                                         skkeys = sk_OPENSSL_STRING_new_null();
269                                 sk_OPENSSL_STRING_push(skkeys, keyfile);
270                                 keyfile = NULL;
271                                 }
272                         signerfile = *++args;
273                         }
274                 else if (!strcmp (*args, "-recip"))
275                         {
276                         if (!args[1])
277                                 goto argerr;
278                         recipfile = *++args;
279                         }
280                 else if (!strcmp (*args, "-md"))
281                         {
282                         if (!args[1])
283                                 goto argerr;
284                         sign_md = EVP_get_digestbyname(*++args);
285                         if (sign_md == NULL)
286                                 {
287                                 BIO_printf(bio_err, "Unknown digest %s\n",
288                                                         *args);
289                                 goto argerr;
290                                 }
291                         }
292                 else if (!strcmp (*args, "-inkey"))
293                         {
294                         if (!args[1])   
295                                 goto argerr;
296                         /* If previous -inkey arument add signer to list */
297                         if (keyfile)
298                                 {
299                                 if (!signerfile)
300                                         {
301                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
302                                         goto argerr;
303                                         }
304                                 if (!sksigners)
305                                         sksigners = sk_OPENSSL_STRING_new_null();
306                                 sk_OPENSSL_STRING_push(sksigners, signerfile);
307                                 signerfile = NULL;
308                                 if (!skkeys)
309                                         skkeys = sk_OPENSSL_STRING_new_null();
310                                 sk_OPENSSL_STRING_push(skkeys, keyfile);
311                                 }
312                         keyfile = *++args;
313                         }
314                 else if (!strcmp (*args, "-keyform"))
315                         {
316                         if (!args[1])
317                                 goto argerr;
318                         keyform = str2fmt(*++args);
319                         }
320                 else if (!strcmp (*args, "-certfile"))
321                         {
322                         if (!args[1])
323                                 goto argerr;
324                         certfile = *++args;
325                         }
326                 else if (!strcmp (*args, "-CAfile"))
327                         {
328                         if (!args[1])
329                                 goto argerr;
330                         CAfile = *++args;
331                         }
332                 else if (!strcmp (*args, "-CApath"))
333                         {
334                         if (!args[1])
335                                 goto argerr;
336                         CApath = *++args;
337                         }
338                 else if (!strcmp (*args, "-in"))
339                         {
340                         if (!args[1])
341                                 goto argerr;
342                         infile = *++args;
343                         }
344                 else if (!strcmp (*args, "-inform"))
345                         {
346                         if (!args[1])
347                                 goto argerr;
348                         informat = str2fmt(*++args);
349                         }
350                 else if (!strcmp (*args, "-outform"))
351                         {
352                         if (!args[1])
353                                 goto argerr;
354                         outformat = str2fmt(*++args);
355                         }
356                 else if (!strcmp (*args, "-out"))
357                         {
358                         if (!args[1])
359                                 goto argerr;
360                         outfile = *++args;
361                         }
362                 else if (!strcmp (*args, "-content"))
363                         {
364                         if (!args[1])
365                                 goto argerr;
366                         contfile = *++args;
367                         }
368                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
369                         continue;
370                 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
371                         badarg = 1;
372                 args++;
373                 }
374
375         if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
376                 {
377                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
378                 goto argerr;
379                 }
380
381         if (operation & SMIME_SIGNERS)
382                 {
383                 /* Check to see if any final signer needs to be appended */
384                 if (keyfile && !signerfile)
385                         {
386                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
387                         goto argerr;
388                         }
389                 if (signerfile)
390                         {
391                         if (!sksigners)
392                                 sksigners = sk_OPENSSL_STRING_new_null();
393                         sk_OPENSSL_STRING_push(sksigners, signerfile);
394                         if (!skkeys)
395                                 skkeys = sk_OPENSSL_STRING_new_null();
396                         if (!keyfile)
397                                 keyfile = signerfile;
398                         sk_OPENSSL_STRING_push(skkeys, keyfile);
399                         }
400                 if (!sksigners)
401                         {
402                         BIO_printf(bio_err, "No signer certificate specified\n");
403                         badarg = 1;
404                         }
405                 signerfile = NULL;
406                 keyfile = NULL;
407                 need_rand = 1;
408                 }
409         else if (operation == SMIME_DECRYPT)
410                 {
411                 if (!recipfile && !keyfile)
412                         {
413                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
414                         badarg = 1;
415                         }
416                 }
417         else if (operation == SMIME_ENCRYPT)
418                 {
419                 if (!*args)
420                         {
421                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
422                         badarg = 1;
423                         }
424                 need_rand = 1;
425                 }
426         else if (!operation)
427                 badarg = 1;
428
429         if (badarg)
430                 {
431                 argerr:
432                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
433                 BIO_printf (bio_err, "where options are\n");
434                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
435                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
436                 BIO_printf (bio_err, "-sign          sign message\n");
437                 BIO_printf (bio_err, "-verify        verify signed message\n");
438                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
439 #ifndef OPENSSL_NO_DES
440                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
441                 BIO_printf (bio_err, "-des           encrypt with DES\n");
442 #endif
443 #ifndef OPENSSL_NO_SEED
444                 BIO_printf (bio_err, "-seed          encrypt with SEED\n");
445 #endif
446 #ifndef OPENSSL_NO_RC2
447                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
448                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
449                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
450 #endif
451 #ifndef OPENSSL_NO_AES
452                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
453                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
454 #endif
455 #ifndef OPENSSL_NO_CAMELLIA
456                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
457                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
458 #endif
459                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
460                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
461                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
462                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
463                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
464                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
465                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
466                 BIO_printf (bio_err, "-certfile file other certificates file\n");
467                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
468                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
469                 BIO_printf (bio_err, "-in file       input file\n");
470                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
471                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
472                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
473                 BIO_printf (bio_err, "-out file      output file\n");
474                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
475                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
476                 BIO_printf (bio_err, "-to addr       to address\n");
477                 BIO_printf (bio_err, "-from ad       from address\n");
478                 BIO_printf (bio_err, "-subject s     subject\n");
479                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
480                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
481                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
482                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
483                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
484 #ifndef OPENSSL_NO_ENGINE
485                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
486 #endif
487                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
488                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
489                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
490                 BIO_printf(bio_err,  "               the random number generator\n");
491                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
492                 goto end;
493                 }
494
495 #ifndef OPENSSL_NO_ENGINE
496         e = setup_engine(bio_err, engine, 0);
497 #endif
498
499         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
500                 {
501                 BIO_printf(bio_err, "Error getting password\n");
502                 goto end;
503                 }
504
505         if (need_rand)
506                 {
507                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
508                 if (inrand != NULL)
509                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
510                                 app_RAND_load_files(inrand));
511                 }
512
513         ret = 2;
514
515         if (!(operation & SMIME_SIGNERS))
516                 flags &= ~PKCS7_DETACHED;
517
518         if (operation & SMIME_OP)
519                 {
520                 if (outformat == FORMAT_ASN1)
521                         outmode = "wb";
522                 }
523         else
524                 {
525                 if (flags & PKCS7_BINARY)
526                         outmode = "wb";
527                 }
528
529         if (operation & SMIME_IP)
530                 {
531                 if (informat == FORMAT_ASN1)
532                         inmode = "rb";
533                 }
534         else
535                 {
536                 if (flags & PKCS7_BINARY)
537                         inmode = "rb";
538                 }
539
540         if (operation == SMIME_ENCRYPT)
541                 {
542                 if (!cipher)
543                         {
544 #ifndef OPENSSL_NO_RC2                  
545                         cipher = EVP_rc2_40_cbc();
546 #else
547                         BIO_printf(bio_err, "No cipher selected\n");
548                         goto end;
549 #endif
550                         }
551                 encerts = sk_X509_new_null();
552                 while (*args)
553                         {
554                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
555                                 NULL, e, "recipient certificate file")))
556                                 {
557 #if 0                           /* An appropriate message is already printed */
558                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
559 #endif
560                                 goto end;
561                                 }
562                         sk_X509_push(encerts, cert);
563                         cert = NULL;
564                         args++;
565                         }
566                 }
567
568         if (certfile)
569                 {
570                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
571                         e, "certificate file")))
572                         {
573                         ERR_print_errors(bio_err);
574                         goto end;
575                         }
576                 }
577
578         if (recipfile && (operation == SMIME_DECRYPT))
579                 {
580                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
581                         e, "recipient certificate file")))
582                         {
583                         ERR_print_errors(bio_err);
584                         goto end;
585                         }
586                 }
587
588         if (operation == SMIME_DECRYPT)
589                 {
590                 if (!keyfile)
591                         keyfile = recipfile;
592                 }
593         else if (operation == SMIME_SIGN)
594                 {
595                 if (!keyfile)
596                         keyfile = signerfile;
597                 }
598         else keyfile = NULL;
599
600         if (keyfile)
601                 {
602                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
603                                "signing key file");
604                 if (!key)
605                         goto end;
606                 }
607
608         if (infile)
609                 {
610                 if (!(in = BIO_new_file(infile, inmode)))
611                         {
612                         BIO_printf (bio_err,
613                                  "Can't open input file %s\n", infile);
614                         goto end;
615                         }
616                 }
617         else
618                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
619
620         if (operation & SMIME_IP)
621                 {
622                 if (informat == FORMAT_SMIME) 
623                         p7 = SMIME_read_PKCS7(in, &indata);
624                 else if (informat == FORMAT_PEM) 
625                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
626                 else if (informat == FORMAT_ASN1) 
627                         p7 = d2i_PKCS7_bio(in, NULL);
628                 else
629                         {
630                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
631                         goto end;
632                         }
633
634                 if (!p7)
635                         {
636                         BIO_printf(bio_err, "Error reading S/MIME message\n");
637                         goto end;
638                         }
639                 if (contfile)
640                         {
641                         BIO_free(indata);
642                         if (!(indata = BIO_new_file(contfile, "rb")))
643                                 {
644                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
645                                 goto end;
646                                 }
647                         }
648                 }
649
650         if (outfile)
651                 {
652                 if (!(out = BIO_new_file(outfile, outmode)))
653                         {
654                         BIO_printf (bio_err,
655                                  "Can't open output file %s\n", outfile);
656                         goto end;
657                         }
658                 }
659         else
660                 {
661                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
662 #ifdef OPENSSL_SYS_VMS
663                 {
664                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
665                     out = BIO_push(tmpbio, out);
666                 }
667 #endif
668                 }
669
670         if (operation == SMIME_VERIFY)
671                 {
672                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
673                         goto end;
674                 X509_STORE_set_verify_cb(store, smime_cb);
675                 if (vpm)
676                         X509_STORE_set1_param(store, vpm);
677                 }
678
679
680         ret = 3;
681
682         if (operation == SMIME_ENCRYPT)
683                 {
684                 if (indef)
685                         flags |= PKCS7_STREAM;
686                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
687                 }
688         else if (operation & SMIME_SIGNERS)
689                 {
690                 int i;
691                 /* If detached data content we only enable streaming if
692                  * S/MIME output format.
693                  */
694                 if (operation == SMIME_SIGN)
695                         {
696                         if (flags & PKCS7_DETACHED)
697                                 {
698                                 if (outformat == FORMAT_SMIME)
699                                         flags |= PKCS7_STREAM;
700                                 }
701                         else if (indef)
702                                 flags |= PKCS7_STREAM;
703                         flags |= PKCS7_PARTIAL;
704                         p7 = PKCS7_sign(NULL, NULL, other, in, flags);
705                         if (!p7)
706                                 goto end;
707                         }
708                 else
709                         flags |= PKCS7_REUSE_DIGEST;
710                 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++)
711                         {
712                         signerfile = sk_OPENSSL_STRING_value(sksigners, i);
713                         keyfile = sk_OPENSSL_STRING_value(skkeys, i);
714                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
715                                         e, "signer certificate");
716                         if (!signer)
717                                 goto end;
718                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
719                                "signing key file");
720                         if (!key)
721                                 goto end;
722                         if (!PKCS7_sign_add_signer(p7, signer, key,
723                                                 sign_md, flags))
724                                 goto end;
725                         X509_free(signer);
726                         signer = NULL;
727                         EVP_PKEY_free(key);
728                         key = NULL;
729                         }
730                 /* If not streaming or resigning finalize structure */
731                 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
732                         {
733                         if (!PKCS7_final(p7, in, flags))
734                                 goto end;
735                         }
736                 }
737
738         if (!p7)
739                 {
740                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
741                 goto end;
742                 }
743
744         ret = 4;
745         if (operation == SMIME_DECRYPT)
746                 {
747                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
748                         {
749                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
750                         goto end;
751                         }
752                 }
753         else if (operation == SMIME_VERIFY)
754                 {
755                 STACK_OF(X509) *signers;
756                 if (PKCS7_verify(p7, other, store, indata, out, flags))
757                         BIO_printf(bio_err, "Verification successful\n");
758                 else
759                         {
760                         BIO_printf(bio_err, "Verification failure\n");
761                         goto end;
762                         }
763                 signers = PKCS7_get0_signers(p7, other, flags);
764                 if (!save_certs(signerfile, signers))
765                         {
766                         BIO_printf(bio_err, "Error writing signers to %s\n",
767                                                                 signerfile);
768                         ret = 5;
769                         goto end;
770                         }
771                 sk_X509_free(signers);
772                 }
773         else if (operation == SMIME_PK7OUT)
774                 PEM_write_bio_PKCS7(out, p7);
775         else
776                 {
777                 if (to)
778                         BIO_printf(out, "To: %s\n", to);
779                 if (from)
780                         BIO_printf(out, "From: %s\n", from);
781                 if (subject)
782                         BIO_printf(out, "Subject: %s\n", subject);
783                 if (outformat == FORMAT_SMIME) 
784                         {
785                         if (operation == SMIME_RESIGN)
786                                 SMIME_write_PKCS7(out, p7, indata, flags);
787                         else
788                                 SMIME_write_PKCS7(out, p7, in, flags);
789                         }
790                 else if (outformat == FORMAT_PEM) 
791                         PEM_write_bio_PKCS7_stream(out, p7, in, flags);
792                 else if (outformat == FORMAT_ASN1) 
793                         i2d_PKCS7_bio_stream(out,p7, in, flags);
794                 else
795                         {
796                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
797                         goto end;
798                         }
799                 }
800         ret = 0;
801 end:
802         if (need_rand)
803                 app_RAND_write_file(NULL, bio_err);
804         if (ret) ERR_print_errors(bio_err);
805         sk_X509_pop_free(encerts, X509_free);
806         sk_X509_pop_free(other, X509_free);
807         if (vpm)
808                 X509_VERIFY_PARAM_free(vpm);
809         if (sksigners)
810                 sk_OPENSSL_STRING_free(sksigners);
811         if (skkeys)
812                 sk_OPENSSL_STRING_free(skkeys);
813         X509_STORE_free(store);
814         X509_free(cert);
815         X509_free(recip);
816         X509_free(signer);
817         EVP_PKEY_free(key);
818         PKCS7_free(p7);
819         BIO_free(in);
820         BIO_free(indata);
821         BIO_free_all(out);
822         if (passin) OPENSSL_free(passin);
823         return (ret);
824 }
825
826 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
827         {
828         int i;
829         BIO *tmp;
830         if (!signerfile)
831                 return 1;
832         tmp = BIO_new_file(signerfile, "w");
833         if (!tmp) return 0;
834         for(i = 0; i < sk_X509_num(signers); i++)
835                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
836         BIO_free(tmp);
837         return 1;
838         }
839         
840
841 /* Minimal callback just to output policy info (if any) */
842
843 static int smime_cb(int ok, X509_STORE_CTX *ctx)
844         {
845         int error;
846
847         error = X509_STORE_CTX_get_error(ctx);
848
849         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
850                 && ((error != X509_V_OK) || (ok != 2)))
851                 return ok;
852
853         policies_print(NULL, ctx);
854
855         return ok;
856
857         }