Annotation of src/usr.bin/openssl/smime.c, Revision 1.2
1.2 ! doug 1: /* $OpenBSD: smime.c,v 1.1 2014/08/26 17:47:25 jsing Exp $ */
1.1 jsing 2: /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3: * project.
4: */
5: /* ====================================================================
6: * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: *
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: *
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in
17: * the documentation and/or other materials provided with the
18: * distribution.
19: *
20: * 3. All advertising materials mentioning features or use of this
21: * software must display the following acknowledgment:
22: * "This product includes software developed by the OpenSSL Project
23: * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24: *
25: * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26: * endorse or promote products derived from this software without
27: * prior written permission. For written permission, please contact
28: * licensing@OpenSSL.org.
29: *
30: * 5. Products derived from this software may not be called "OpenSSL"
31: * nor may "OpenSSL" appear in their names without prior written
32: * permission of the OpenSSL Project.
33: *
34: * 6. Redistributions of any form whatsoever must retain the following
35: * acknowledgment:
36: * "This product includes software developed by the OpenSSL Project
37: * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38: *
39: * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50: * OF THE POSSIBILITY OF SUCH DAMAGE.
51: * ====================================================================
52: *
53: * This product includes cryptographic software written by Eric Young
54: * (eay@cryptsoft.com). This product includes software written by Tim
55: * Hudson (tjh@cryptsoft.com).
56: *
57: */
58:
59: /* S/MIME utility function */
60:
61: #include <stdio.h>
62: #include <string.h>
63:
64: #include "apps.h"
65:
66: #include <openssl/crypto.h>
67: #include <openssl/err.h>
68: #include <openssl/pem.h>
69: #include <openssl/x509_vfy.h>
70: #include <openssl/x509v3.h>
71:
72: static int save_certs(char *signerfile, STACK_OF(X509) * signers);
73: static int smime_cb(int ok, X509_STORE_CTX * ctx);
74:
75: #define SMIME_OP 0x10
76: #define SMIME_IP 0x20
77: #define SMIME_SIGNERS 0x40
78: #define SMIME_ENCRYPT (1 | SMIME_OP)
79: #define SMIME_DECRYPT (2 | SMIME_IP)
80: #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
81: #define SMIME_VERIFY (4 | SMIME_IP)
82: #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
83: #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
84:
85: int smime_main(int, char **);
86:
87: int
88: smime_main(int argc, char **argv)
89: {
90: ENGINE *e = NULL;
91: int operation = 0;
92: int ret = 0;
93: char **args;
94: const char *inmode = "r", *outmode = "w";
95: char *infile = NULL, *outfile = NULL;
96: char *signerfile = NULL, *recipfile = NULL;
97: STACK_OF(OPENSSL_STRING) * sksigners = NULL, *skkeys = NULL;
98: char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
99: const EVP_CIPHER *cipher = NULL;
100: PKCS7 *p7 = NULL;
101: X509_STORE *store = NULL;
102: X509 *cert = NULL, *recip = NULL, *signer = NULL;
103: EVP_PKEY *key = NULL;
104: STACK_OF(X509) * encerts = NULL, *other = NULL;
105: BIO *in = NULL, *out = NULL, *indata = NULL;
106: int badarg = 0;
107: int flags = PKCS7_DETACHED;
108: char *to = NULL, *from = NULL, *subject = NULL;
109: char *CAfile = NULL, *CApath = NULL;
110: char *passargin = NULL, *passin = NULL;
111: int indef = 0;
112: const EVP_MD *sign_md = NULL;
113: int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
114: int keyform = FORMAT_PEM;
115: #ifndef OPENSSL_NO_ENGINE
116: char *engine = NULL;
117: #endif
118:
119: X509_VERIFY_PARAM *vpm = NULL;
120:
121: args = argv + 1;
122: ret = 1;
123:
124: while (!badarg && *args && *args[0] == '-') {
125: if (!strcmp(*args, "-encrypt"))
126: operation = SMIME_ENCRYPT;
127: else if (!strcmp(*args, "-decrypt"))
128: operation = SMIME_DECRYPT;
129: else if (!strcmp(*args, "-sign"))
130: operation = SMIME_SIGN;
131: else if (!strcmp(*args, "-resign"))
132: operation = SMIME_RESIGN;
133: else if (!strcmp(*args, "-verify"))
134: operation = SMIME_VERIFY;
135: else if (!strcmp(*args, "-pk7out"))
136: operation = SMIME_PK7OUT;
137: #ifndef OPENSSL_NO_DES
138: else if (!strcmp(*args, "-des3"))
139: cipher = EVP_des_ede3_cbc();
140: else if (!strcmp(*args, "-des"))
141: cipher = EVP_des_cbc();
142: #endif
143: #ifndef OPENSSL_NO_RC2
144: else if (!strcmp(*args, "-rc2-40"))
145: cipher = EVP_rc2_40_cbc();
146: else if (!strcmp(*args, "-rc2-128"))
147: cipher = EVP_rc2_cbc();
148: else if (!strcmp(*args, "-rc2-64"))
149: cipher = EVP_rc2_64_cbc();
150: #endif
151: #ifndef OPENSSL_NO_AES
152: else if (!strcmp(*args, "-aes128"))
153: cipher = EVP_aes_128_cbc();
154: else if (!strcmp(*args, "-aes192"))
155: cipher = EVP_aes_192_cbc();
156: else if (!strcmp(*args, "-aes256"))
157: cipher = EVP_aes_256_cbc();
158: #endif
159: #ifndef OPENSSL_NO_CAMELLIA
160: else if (!strcmp(*args, "-camellia128"))
161: cipher = EVP_camellia_128_cbc();
162: else if (!strcmp(*args, "-camellia192"))
163: cipher = EVP_camellia_192_cbc();
164: else if (!strcmp(*args, "-camellia256"))
165: cipher = EVP_camellia_256_cbc();
166: #endif
167: else if (!strcmp(*args, "-text"))
168: flags |= PKCS7_TEXT;
169: else if (!strcmp(*args, "-nointern"))
170: flags |= PKCS7_NOINTERN;
171: else if (!strcmp(*args, "-noverify"))
172: flags |= PKCS7_NOVERIFY;
173: else if (!strcmp(*args, "-nochain"))
174: flags |= PKCS7_NOCHAIN;
175: else if (!strcmp(*args, "-nocerts"))
176: flags |= PKCS7_NOCERTS;
177: else if (!strcmp(*args, "-noattr"))
178: flags |= PKCS7_NOATTR;
179: else if (!strcmp(*args, "-nodetach"))
180: flags &= ~PKCS7_DETACHED;
181: else if (!strcmp(*args, "-nosmimecap"))
182: flags |= PKCS7_NOSMIMECAP;
183: else if (!strcmp(*args, "-binary"))
184: flags |= PKCS7_BINARY;
185: else if (!strcmp(*args, "-nosigs"))
186: flags |= PKCS7_NOSIGS;
187: else if (!strcmp(*args, "-stream"))
188: indef = 1;
189: else if (!strcmp(*args, "-indef"))
190: indef = 1;
191: else if (!strcmp(*args, "-noindef"))
192: indef = 0;
193: else if (!strcmp(*args, "-nooldmime"))
194: flags |= PKCS7_NOOLDMIMETYPE;
195: else if (!strcmp(*args, "-crlfeol"))
196: flags |= PKCS7_CRLFEOL;
197: #ifndef OPENSSL_NO_ENGINE
198: else if (!strcmp(*args, "-engine")) {
199: if (!args[1])
200: goto argerr;
201: engine = *++args;
202: }
203: #endif
204: else if (!strcmp(*args, "-passin")) {
205: if (!args[1])
206: goto argerr;
207: passargin = *++args;
208: } else if (!strcmp(*args, "-to")) {
209: if (!args[1])
210: goto argerr;
211: to = *++args;
212: } else if (!strcmp(*args, "-from")) {
213: if (!args[1])
214: goto argerr;
215: from = *++args;
216: } else if (!strcmp(*args, "-subject")) {
217: if (!args[1])
218: goto argerr;
219: subject = *++args;
220: } else if (!strcmp(*args, "-signer")) {
221: if (!args[1])
222: goto argerr;
223: /* If previous -signer argument add signer to list */
224:
225: if (signerfile) {
226: if (!sksigners)
227: sksigners = sk_OPENSSL_STRING_new_null();
228: sk_OPENSSL_STRING_push(sksigners, signerfile);
229: if (!keyfile)
230: keyfile = signerfile;
231: if (!skkeys)
232: skkeys = sk_OPENSSL_STRING_new_null();
233: sk_OPENSSL_STRING_push(skkeys, keyfile);
234: keyfile = NULL;
235: }
236: signerfile = *++args;
237: } else if (!strcmp(*args, "-recip")) {
238: if (!args[1])
239: goto argerr;
240: recipfile = *++args;
241: } else if (!strcmp(*args, "-md")) {
242: if (!args[1])
243: goto argerr;
244: sign_md = EVP_get_digestbyname(*++args);
245: if (sign_md == NULL) {
246: BIO_printf(bio_err, "Unknown digest %s\n",
247: *args);
248: goto argerr;
249: }
250: } else if (!strcmp(*args, "-inkey")) {
251: if (!args[1])
252: goto argerr;
253: /* If previous -inkey arument add signer to list */
254: if (keyfile) {
255: if (!signerfile) {
256: BIO_puts(bio_err, "Illegal -inkey without -signer\n");
257: goto argerr;
258: }
259: if (!sksigners)
260: sksigners = sk_OPENSSL_STRING_new_null();
261: sk_OPENSSL_STRING_push(sksigners, signerfile);
262: signerfile = NULL;
263: if (!skkeys)
264: skkeys = sk_OPENSSL_STRING_new_null();
265: sk_OPENSSL_STRING_push(skkeys, keyfile);
266: }
267: keyfile = *++args;
268: } else if (!strcmp(*args, "-keyform")) {
269: if (!args[1])
270: goto argerr;
271: keyform = str2fmt(*++args);
272: } else if (!strcmp(*args, "-certfile")) {
273: if (!args[1])
274: goto argerr;
275: certfile = *++args;
276: } else if (!strcmp(*args, "-CAfile")) {
277: if (!args[1])
278: goto argerr;
279: CAfile = *++args;
280: } else if (!strcmp(*args, "-CApath")) {
281: if (!args[1])
282: goto argerr;
283: CApath = *++args;
284: } else if (!strcmp(*args, "-in")) {
285: if (!args[1])
286: goto argerr;
287: infile = *++args;
288: } else if (!strcmp(*args, "-inform")) {
289: if (!args[1])
290: goto argerr;
291: informat = str2fmt(*++args);
292: } else if (!strcmp(*args, "-outform")) {
293: if (!args[1])
294: goto argerr;
295: outformat = str2fmt(*++args);
296: } else if (!strcmp(*args, "-out")) {
297: if (!args[1])
298: goto argerr;
299: outfile = *++args;
300: } else if (!strcmp(*args, "-content")) {
301: if (!args[1])
302: goto argerr;
303: contfile = *++args;
304: } else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
305: continue;
306: else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
307: badarg = 1;
308: args++;
309: }
310:
311: if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) {
312: BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
313: goto argerr;
314: }
315: if (operation & SMIME_SIGNERS) {
316: /* Check to see if any final signer needs to be appended */
317: if (keyfile && !signerfile) {
318: BIO_puts(bio_err, "Illegal -inkey without -signer\n");
319: goto argerr;
320: }
321: if (signerfile) {
322: if (!sksigners)
323: sksigners = sk_OPENSSL_STRING_new_null();
324: sk_OPENSSL_STRING_push(sksigners, signerfile);
325: if (!skkeys)
326: skkeys = sk_OPENSSL_STRING_new_null();
327: if (!keyfile)
328: keyfile = signerfile;
329: sk_OPENSSL_STRING_push(skkeys, keyfile);
330: }
331: if (!sksigners) {
332: BIO_printf(bio_err, "No signer certificate specified\n");
333: badarg = 1;
334: }
335: signerfile = NULL;
336: keyfile = NULL;
337: } else if (operation == SMIME_DECRYPT) {
338: if (!recipfile && !keyfile) {
339: BIO_printf(bio_err, "No recipient certificate or key specified\n");
340: badarg = 1;
341: }
342: } else if (operation == SMIME_ENCRYPT) {
343: if (!*args) {
344: BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
345: badarg = 1;
346: }
347: } else if (!operation)
348: badarg = 1;
349:
350: if (badarg) {
351: argerr:
352: BIO_printf(bio_err, "Usage smime [options] cert.pem ...\n");
353: BIO_printf(bio_err, "where options are\n");
354: BIO_printf(bio_err, "-encrypt encrypt message\n");
355: BIO_printf(bio_err, "-decrypt decrypt encrypted message\n");
356: BIO_printf(bio_err, "-sign sign message\n");
357: BIO_printf(bio_err, "-verify verify signed message\n");
358: BIO_printf(bio_err, "-pk7out output PKCS#7 structure\n");
359: #ifndef OPENSSL_NO_DES
360: BIO_printf(bio_err, "-des3 encrypt with triple DES\n");
361: BIO_printf(bio_err, "-des encrypt with DES\n");
362: #endif
363: #ifndef OPENSSL_NO_RC2
364: BIO_printf(bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
365: BIO_printf(bio_err, "-rc2-64 encrypt with RC2-64\n");
366: BIO_printf(bio_err, "-rc2-128 encrypt with RC2-128\n");
367: #endif
368: #ifndef OPENSSL_NO_AES
369: BIO_printf(bio_err, "-aes128, -aes192, -aes256\n");
370: BIO_printf(bio_err, " encrypt PEM output with cbc aes\n");
371: #endif
372: #ifndef OPENSSL_NO_CAMELLIA
373: BIO_printf(bio_err, "-camellia128, -camellia192, -camellia256\n");
374: BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n");
375: #endif
376: BIO_printf(bio_err, "-nointern don't search certificates in message for signer\n");
377: BIO_printf(bio_err, "-nosigs don't verify message signature\n");
378: BIO_printf(bio_err, "-noverify don't verify signers certificate\n");
379: BIO_printf(bio_err, "-nocerts don't include signers certificate when signing\n");
380: BIO_printf(bio_err, "-nodetach use opaque signing\n");
381: BIO_printf(bio_err, "-noattr don't include any signed attributes\n");
382: BIO_printf(bio_err, "-binary don't translate message to text\n");
383: BIO_printf(bio_err, "-certfile file other certificates file\n");
384: BIO_printf(bio_err, "-signer file signer certificate file\n");
385: BIO_printf(bio_err, "-recip file recipient certificate file for decryption\n");
386: BIO_printf(bio_err, "-in file input file\n");
387: BIO_printf(bio_err, "-inform arg input format SMIME (default), PEM or DER\n");
388: BIO_printf(bio_err, "-inkey file input private key (if not signer or recipient)\n");
389: BIO_printf(bio_err, "-keyform arg input private key format (PEM or ENGINE)\n");
390: BIO_printf(bio_err, "-out file output file\n");
391: BIO_printf(bio_err, "-outform arg output format SMIME (default), PEM or DER\n");
392: BIO_printf(bio_err, "-content file supply or override content for detached signature\n");
393: BIO_printf(bio_err, "-to addr to address\n");
394: BIO_printf(bio_err, "-from ad from address\n");
395: BIO_printf(bio_err, "-subject s subject\n");
396: BIO_printf(bio_err, "-text include or delete text MIME headers\n");
397: BIO_printf(bio_err, "-CApath dir trusted certificates directory\n");
398: BIO_printf(bio_err, "-CAfile file trusted certificates file\n");
399: BIO_printf(bio_err, "-crl_check check revocation status of signer's certificate using CRLs\n");
400: BIO_printf(bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
401: #ifndef OPENSSL_NO_ENGINE
402: BIO_printf(bio_err, "-engine e use engine e, possibly a hardware device.\n");
403: #endif
404: BIO_printf(bio_err, "-passin arg input file pass phrase source\n");
405: BIO_printf(bio_err, "cert.pem recipient certificate(s) for encryption\n");
406: goto end;
407: }
408: #ifndef OPENSSL_NO_ENGINE
409: e = setup_engine(bio_err, engine, 0);
410: #endif
411:
412: if (!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
413: BIO_printf(bio_err, "Error getting password\n");
414: goto end;
415: }
416: ret = 2;
417:
418: if (!(operation & SMIME_SIGNERS))
419: flags &= ~PKCS7_DETACHED;
420:
421: if (operation & SMIME_OP) {
422: if (outformat == FORMAT_ASN1)
423: outmode = "wb";
424: } else {
425: if (flags & PKCS7_BINARY)
426: outmode = "wb";
427: }
428:
429: if (operation & SMIME_IP) {
430: if (informat == FORMAT_ASN1)
431: inmode = "rb";
432: } else {
433: if (flags & PKCS7_BINARY)
434: inmode = "rb";
435: }
436:
437: if (operation == SMIME_ENCRYPT) {
438: if (!cipher) {
439: #ifndef OPENSSL_NO_RC2
440: cipher = EVP_rc2_40_cbc();
441: #else
442: BIO_printf(bio_err, "No cipher selected\n");
443: goto end;
444: #endif
445: }
446: encerts = sk_X509_new_null();
447: while (*args) {
448: if (!(cert = load_cert(bio_err, *args, FORMAT_PEM,
1.2 ! doug 449: NULL, e, "recipient certificate file"))) {
1.1 jsing 450: goto end;
451: }
452: sk_X509_push(encerts, cert);
453: cert = NULL;
454: args++;
455: }
456: }
457: if (certfile) {
458: if (!(other = load_certs(bio_err, certfile, FORMAT_PEM, NULL,
459: e, "certificate file"))) {
460: ERR_print_errors(bio_err);
461: goto end;
462: }
463: }
464: if (recipfile && (operation == SMIME_DECRYPT)) {
465: if (!(recip = load_cert(bio_err, recipfile, FORMAT_PEM, NULL,
466: e, "recipient certificate file"))) {
467: ERR_print_errors(bio_err);
468: goto end;
469: }
470: }
471: if (operation == SMIME_DECRYPT) {
472: if (!keyfile)
473: keyfile = recipfile;
474: } else if (operation == SMIME_SIGN) {
475: if (!keyfile)
476: keyfile = signerfile;
477: } else
478: keyfile = NULL;
479:
480: if (keyfile) {
481: key = load_key(bio_err, keyfile, keyform, 0, passin, e,
482: "signing key file");
483: if (!key)
484: goto end;
485: }
486: if (infile) {
487: if (!(in = BIO_new_file(infile, inmode))) {
488: BIO_printf(bio_err,
489: "Can't open input file %s\n", infile);
490: goto end;
491: }
492: } else
493: in = BIO_new_fp(stdin, BIO_NOCLOSE);
494:
495: if (operation & SMIME_IP) {
496: if (informat == FORMAT_SMIME)
497: p7 = SMIME_read_PKCS7(in, &indata);
498: else if (informat == FORMAT_PEM)
499: p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
500: else if (informat == FORMAT_ASN1)
501: p7 = d2i_PKCS7_bio(in, NULL);
502: else {
503: BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
504: goto end;
505: }
506:
507: if (!p7) {
508: BIO_printf(bio_err, "Error reading S/MIME message\n");
509: goto end;
510: }
511: if (contfile) {
512: BIO_free(indata);
513: if (!(indata = BIO_new_file(contfile, "rb"))) {
514: BIO_printf(bio_err, "Can't read content file %s\n", contfile);
515: goto end;
516: }
517: }
518: }
519: if (outfile) {
520: if (!(out = BIO_new_file(outfile, outmode))) {
521: BIO_printf(bio_err,
522: "Can't open output file %s\n", outfile);
523: goto end;
524: }
525: } else {
526: out = BIO_new_fp(stdout, BIO_NOCLOSE);
527: }
528:
529: if (operation == SMIME_VERIFY) {
530: if (!(store = setup_verify(bio_err, CAfile, CApath)))
531: goto end;
532: X509_STORE_set_verify_cb(store, smime_cb);
533: if (vpm)
534: X509_STORE_set1_param(store, vpm);
535: }
536: ret = 3;
537:
538: if (operation == SMIME_ENCRYPT) {
539: if (indef)
540: flags |= PKCS7_STREAM;
541: p7 = PKCS7_encrypt(encerts, in, cipher, flags);
542: } else if (operation & SMIME_SIGNERS) {
543: int i;
544: /*
545: * If detached data content we only enable streaming if
546: * S/MIME output format.
547: */
548: if (operation == SMIME_SIGN) {
549: if (flags & PKCS7_DETACHED) {
550: if (outformat == FORMAT_SMIME)
551: flags |= PKCS7_STREAM;
552: } else if (indef)
553: flags |= PKCS7_STREAM;
554: flags |= PKCS7_PARTIAL;
555: p7 = PKCS7_sign(NULL, NULL, other, in, flags);
556: if (!p7)
557: goto end;
558: } else
559: flags |= PKCS7_REUSE_DIGEST;
560: for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
561: signerfile = sk_OPENSSL_STRING_value(sksigners, i);
562: keyfile = sk_OPENSSL_STRING_value(skkeys, i);
563: signer = load_cert(bio_err, signerfile, FORMAT_PEM, NULL,
564: e, "signer certificate");
565: if (!signer)
566: goto end;
567: key = load_key(bio_err, keyfile, keyform, 0, passin, e,
568: "signing key file");
569: if (!key)
570: goto end;
571: if (!PKCS7_sign_add_signer(p7, signer, key,
572: sign_md, flags))
573: goto end;
574: X509_free(signer);
575: signer = NULL;
576: EVP_PKEY_free(key);
577: key = NULL;
578: }
579: /* If not streaming or resigning finalize structure */
580: if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) {
581: if (!PKCS7_final(p7, in, flags))
582: goto end;
583: }
584: }
585: if (!p7) {
586: BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
587: goto end;
588: }
589: ret = 4;
590: if (operation == SMIME_DECRYPT) {
591: if (!PKCS7_decrypt(p7, key, recip, out, flags)) {
592: BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
593: goto end;
594: }
595: } else if (operation == SMIME_VERIFY) {
596: STACK_OF(X509) * signers;
597: if (PKCS7_verify(p7, other, store, indata, out, flags))
598: BIO_printf(bio_err, "Verification successful\n");
599: else {
600: BIO_printf(bio_err, "Verification failure\n");
601: goto end;
602: }
603: signers = PKCS7_get0_signers(p7, other, flags);
604: if (!save_certs(signerfile, signers)) {
605: BIO_printf(bio_err, "Error writing signers to %s\n",
606: signerfile);
607: ret = 5;
608: goto end;
609: }
610: sk_X509_free(signers);
611: } else if (operation == SMIME_PK7OUT)
612: PEM_write_bio_PKCS7(out, p7);
613: else {
614: if (to)
615: BIO_printf(out, "To: %s\n", to);
616: if (from)
617: BIO_printf(out, "From: %s\n", from);
618: if (subject)
619: BIO_printf(out, "Subject: %s\n", subject);
620: if (outformat == FORMAT_SMIME) {
621: if (operation == SMIME_RESIGN)
622: SMIME_write_PKCS7(out, p7, indata, flags);
623: else
624: SMIME_write_PKCS7(out, p7, in, flags);
625: } else if (outformat == FORMAT_PEM)
626: PEM_write_bio_PKCS7_stream(out, p7, in, flags);
627: else if (outformat == FORMAT_ASN1)
628: i2d_PKCS7_bio_stream(out, p7, in, flags);
629: else {
630: BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
631: goto end;
632: }
633: }
634: ret = 0;
635: end:
636: if (ret)
637: ERR_print_errors(bio_err);
638: sk_X509_pop_free(encerts, X509_free);
639: sk_X509_pop_free(other, X509_free);
640: if (vpm)
641: X509_VERIFY_PARAM_free(vpm);
642: if (sksigners)
643: sk_OPENSSL_STRING_free(sksigners);
644: if (skkeys)
645: sk_OPENSSL_STRING_free(skkeys);
646: X509_STORE_free(store);
647: X509_free(cert);
648: X509_free(recip);
649: X509_free(signer);
650: EVP_PKEY_free(key);
651: PKCS7_free(p7);
652: BIO_free(in);
653: BIO_free(indata);
654: BIO_free_all(out);
655: free(passin);
656:
657: return (ret);
658: }
659:
660: static int
661: save_certs(char *signerfile, STACK_OF(X509) * signers)
662: {
663: int i;
664: BIO *tmp;
665: if (!signerfile)
666: return 1;
667: tmp = BIO_new_file(signerfile, "w");
668: if (!tmp)
669: return 0;
670: for (i = 0; i < sk_X509_num(signers); i++)
671: PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
672: BIO_free(tmp);
673: return 1;
674: }
675:
676:
677: /* Minimal callback just to output policy info (if any) */
678:
679: static int
680: smime_cb(int ok, X509_STORE_CTX * ctx)
681: {
682: int error;
683:
684: error = X509_STORE_CTX_get_error(ctx);
685:
686: if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
687: && ((error != X509_V_OK) || (ok != 2)))
688: return ok;
689:
690: policies_print(NULL, ctx);
691:
692: return ok;
693:
694: }