Fix broken build
[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, "-trusted_first use locally trusted CA's first when building trust chain\n");
483                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
484                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
485 #ifndef OPENSSL_NO_ENGINE
486                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
487 #endif
488                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
489                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
490                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
491                 BIO_printf(bio_err,  "               the random number generator\n");
492                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
493                 goto end;
494                 }
495
496 #ifndef OPENSSL_NO_ENGINE
497         e = setup_engine(bio_err, engine, 0);
498 #endif
499
500         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
501                 {
502                 BIO_printf(bio_err, "Error getting password\n");
503                 goto end;
504                 }
505
506         if (need_rand)
507                 {
508                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
509                 if (inrand != NULL)
510                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
511                                 app_RAND_load_files(inrand));
512                 }
513
514         ret = 2;
515
516         if (!(operation & SMIME_SIGNERS))
517                 flags &= ~PKCS7_DETACHED;
518
519         if (operation & SMIME_OP)
520                 {
521                 if (outformat == FORMAT_ASN1)
522                         outmode = "wb";
523                 }
524         else
525                 {
526                 if (flags & PKCS7_BINARY)
527                         outmode = "wb";
528                 }
529
530         if (operation & SMIME_IP)
531                 {
532                 if (informat == FORMAT_ASN1)
533                         inmode = "rb";
534                 }
535         else
536                 {
537                 if (flags & PKCS7_BINARY)
538                         inmode = "rb";
539                 }
540
541         if (operation == SMIME_ENCRYPT)
542                 {
543                 if (!cipher)
544                         {
545 #ifndef OPENSSL_NO_DES                  
546                         cipher = EVP_des_ede3_cbc();
547 #else
548                         BIO_printf(bio_err, "No cipher selected\n");
549                         goto end;
550 #endif
551                         }
552                 encerts = sk_X509_new_null();
553                 while (*args)
554                         {
555                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
556                                 NULL, e, "recipient certificate file")))
557                                 {
558 #if 0                           /* An appropriate message is already printed */
559                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
560 #endif
561                                 goto end;
562                                 }
563                         sk_X509_push(encerts, cert);
564                         cert = NULL;
565                         args++;
566                         }
567                 }
568
569         if (certfile)
570                 {
571                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
572                         e, "certificate file")))
573                         {
574                         ERR_print_errors(bio_err);
575                         goto end;
576                         }
577                 }
578
579         if (recipfile && (operation == SMIME_DECRYPT))
580                 {
581                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
582                         e, "recipient certificate file")))
583                         {
584                         ERR_print_errors(bio_err);
585                         goto end;
586                         }
587                 }
588
589         if (operation == SMIME_DECRYPT)
590                 {
591                 if (!keyfile)
592                         keyfile = recipfile;
593                 }
594         else if (operation == SMIME_SIGN)
595                 {
596                 if (!keyfile)
597                         keyfile = signerfile;
598                 }
599         else keyfile = NULL;
600
601         if (keyfile)
602                 {
603                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
604                                "signing key file");
605                 if (!key)
606                         goto end;
607                 }
608
609         if (infile)
610                 {
611                 if (!(in = BIO_new_file(infile, inmode)))
612                         {
613                         BIO_printf (bio_err,
614                                  "Can't open input file %s\n", infile);
615                         goto end;
616                         }
617                 }
618         else
619                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
620
621         if (operation & SMIME_IP)
622                 {
623                 if (informat == FORMAT_SMIME) 
624                         p7 = SMIME_read_PKCS7(in, &indata);
625                 else if (informat == FORMAT_PEM) 
626                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
627                 else if (informat == FORMAT_ASN1) 
628                         p7 = d2i_PKCS7_bio(in, NULL);
629                 else
630                         {
631                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
632                         goto end;
633                         }
634
635                 if (!p7)
636                         {
637                         BIO_printf(bio_err, "Error reading S/MIME message\n");
638                         goto end;
639                         }
640                 if (contfile)
641                         {
642                         BIO_free(indata);
643                         if (!(indata = BIO_new_file(contfile, "rb")))
644                                 {
645                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
646                                 goto end;
647                                 }
648                         }
649                 }
650
651         if (outfile)
652                 {
653                 if (!(out = BIO_new_file(outfile, outmode)))
654                         {
655                         BIO_printf (bio_err,
656                                  "Can't open output file %s\n", outfile);
657                         goto end;
658                         }
659                 }
660         else
661                 {
662                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
663 #ifdef OPENSSL_SYS_VMS
664                 {
665                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
666                     out = BIO_push(tmpbio, out);
667                 }
668 #endif
669                 }
670
671         if (operation == SMIME_VERIFY)
672                 {
673                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
674                         goto end;
675                 X509_STORE_set_verify_cb(store, smime_cb);
676                 if (vpm)
677                         X509_STORE_set1_param(store, vpm);
678                 }
679
680
681         ret = 3;
682
683         if (operation == SMIME_ENCRYPT)
684                 {
685                 if (indef)
686                         flags |= PKCS7_STREAM;
687                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
688                 }
689         else if (operation & SMIME_SIGNERS)
690                 {
691                 int i;
692                 /* If detached data content we only enable streaming if
693                  * S/MIME output format.
694                  */
695                 if (operation == SMIME_SIGN)
696                         {
697                         if (flags & PKCS7_DETACHED)
698                                 {
699                                 if (outformat == FORMAT_SMIME)
700                                         flags |= PKCS7_STREAM;
701                                 }
702                         else if (indef)
703                                 flags |= PKCS7_STREAM;
704                         flags |= PKCS7_PARTIAL;
705                         p7 = PKCS7_sign(NULL, NULL, other, in, flags);
706                         if (!p7)
707                                 goto end;
708                         if (flags & PKCS7_NOCERTS)
709                                 {
710                                 for (i = 0; i < sk_X509_num(other); i++)
711                                         {
712                                         X509 *x = sk_X509_value(other, i);
713                                         PKCS7_add_certificate(p7, x);
714                                         }
715                                 }
716                         }
717                 else
718                         flags |= PKCS7_REUSE_DIGEST;
719                 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++)
720                         {
721                         signerfile = sk_OPENSSL_STRING_value(sksigners, i);
722                         keyfile = sk_OPENSSL_STRING_value(skkeys, i);
723                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
724                                         e, "signer certificate");
725                         if (!signer)
726                                 goto end;
727                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
728                                "signing key file");
729                         if (!key)
730                                 goto end;
731                         if (!PKCS7_sign_add_signer(p7, signer, key,
732                                                 sign_md, flags))
733                                 goto end;
734                         X509_free(signer);
735                         signer = NULL;
736                         EVP_PKEY_free(key);
737                         key = NULL;
738                         }
739                 /* If not streaming or resigning finalize structure */
740                 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
741                         {
742                         if (!PKCS7_final(p7, in, flags))
743                                 goto end;
744                         }
745                 }
746
747         if (!p7)
748                 {
749                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
750                 goto end;
751                 }
752
753         ret = 4;
754         if (operation == SMIME_DECRYPT)
755                 {
756                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
757                         {
758                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
759                         goto end;
760                         }
761                 }
762         else if (operation == SMIME_VERIFY)
763                 {
764                 STACK_OF(X509) *signers;
765                 if (PKCS7_verify(p7, other, store, indata, out, flags))
766                         BIO_printf(bio_err, "Verification successful\n");
767                 else
768                         {
769                         BIO_printf(bio_err, "Verification failure\n");
770                         goto end;
771                         }
772                 signers = PKCS7_get0_signers(p7, other, flags);
773                 if (!save_certs(signerfile, signers))
774                         {
775                         BIO_printf(bio_err, "Error writing signers to %s\n",
776                                                                 signerfile);
777                         ret = 5;
778                         goto end;
779                         }
780                 sk_X509_free(signers);
781                 }
782         else if (operation == SMIME_PK7OUT)
783                 PEM_write_bio_PKCS7(out, p7);
784         else
785                 {
786                 if (to)
787                         BIO_printf(out, "To: %s\n", to);
788                 if (from)
789                         BIO_printf(out, "From: %s\n", from);
790                 if (subject)
791                         BIO_printf(out, "Subject: %s\n", subject);
792                 if (outformat == FORMAT_SMIME) 
793                         {
794                         if (operation == SMIME_RESIGN)
795                                 SMIME_write_PKCS7(out, p7, indata, flags);
796                         else
797                                 SMIME_write_PKCS7(out, p7, in, flags);
798                         }
799                 else if (outformat == FORMAT_PEM) 
800                         PEM_write_bio_PKCS7_stream(out, p7, in, flags);
801                 else if (outformat == FORMAT_ASN1) 
802                         i2d_PKCS7_bio_stream(out,p7, in, flags);
803                 else
804                         {
805                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
806                         goto end;
807                         }
808                 }
809         ret = 0;
810 end:
811         if (need_rand)
812                 app_RAND_write_file(NULL, bio_err);
813         if (ret) ERR_print_errors(bio_err);
814         sk_X509_pop_free(encerts, X509_free);
815         sk_X509_pop_free(other, X509_free);
816         if (vpm)
817                 X509_VERIFY_PARAM_free(vpm);
818         if (sksigners)
819                 sk_OPENSSL_STRING_free(sksigners);
820         if (skkeys)
821                 sk_OPENSSL_STRING_free(skkeys);
822         X509_STORE_free(store);
823         X509_free(cert);
824         X509_free(recip);
825         X509_free(signer);
826         EVP_PKEY_free(key);
827         PKCS7_free(p7);
828         BIO_free(in);
829         BIO_free(indata);
830         BIO_free_all(out);
831         if (passin) OPENSSL_free(passin);
832         return (ret);
833 }
834
835 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
836         {
837         int i;
838         BIO *tmp;
839         if (!signerfile)
840                 return 1;
841         tmp = BIO_new_file(signerfile, "w");
842         if (!tmp) return 0;
843         for(i = 0; i < sk_X509_num(signers); i++)
844                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
845         BIO_free(tmp);
846         return 1;
847         }
848         
849
850 /* Minimal callback just to output policy info (if any) */
851
852 static int smime_cb(int ok, X509_STORE_CTX *ctx)
853         {
854         int error;
855
856         error = X509_STORE_CTX_get_error(ctx);
857
858         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
859                 && ((error != X509_V_OK) || (ok != 2)))
860                 return ok;
861
862         policies_print(NULL, ctx);
863
864         return ok;
865
866         }