1 /* crypto/pkcs7/pk7_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/objects.h>
62 #include <openssl/x509.h>
63 #include "asn1_locl.h"
64
PKCS7_ctrl(PKCS7 * p7,int cmd,long larg,char * parg)65 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
66 {
67 int nid;
68 long ret;
69
70 nid = OBJ_obj2nid(p7->type);
71
72 switch (cmd) {
73 /* NOTE(emilia): does not support detached digested data. */
74 case PKCS7_OP_SET_DETACHED_SIGNATURE:
75 if (nid == NID_pkcs7_signed) {
76 ret = p7->detached = (int)larg;
77 if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
78 ASN1_OCTET_STRING *os;
79 os = p7->d.sign->contents->d.data;
80 ASN1_OCTET_STRING_free(os);
81 p7->d.sign->contents->d.data = NULL;
82 }
83 } else {
84 PKCS7err(PKCS7_F_PKCS7_CTRL,
85 PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
86 ret = 0;
87 }
88 break;
89 case PKCS7_OP_GET_DETACHED_SIGNATURE:
90 if (nid == NID_pkcs7_signed) {
91 if (!p7->d.sign || !p7->d.sign->contents->d.ptr)
92 ret = 1;
93 else
94 ret = 0;
95
96 p7->detached = ret;
97 } else {
98 PKCS7err(PKCS7_F_PKCS7_CTRL,
99 PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
100 ret = 0;
101 }
102
103 break;
104 default:
105 PKCS7err(PKCS7_F_PKCS7_CTRL, PKCS7_R_UNKNOWN_OPERATION);
106 ret = 0;
107 }
108 return (ret);
109 }
110
PKCS7_content_new(PKCS7 * p7,int type)111 int PKCS7_content_new(PKCS7 *p7, int type)
112 {
113 PKCS7 *ret = NULL;
114
115 if ((ret = PKCS7_new()) == NULL)
116 goto err;
117 if (!PKCS7_set_type(ret, type))
118 goto err;
119 if (!PKCS7_set_content(p7, ret))
120 goto err;
121
122 return (1);
123 err:
124 if (ret != NULL)
125 PKCS7_free(ret);
126 return (0);
127 }
128
PKCS7_set_content(PKCS7 * p7,PKCS7 * p7_data)129 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
130 {
131 int i;
132
133 i = OBJ_obj2nid(p7->type);
134 switch (i) {
135 case NID_pkcs7_signed:
136 if (p7->d.sign->contents != NULL)
137 PKCS7_free(p7->d.sign->contents);
138 p7->d.sign->contents = p7_data;
139 break;
140 case NID_pkcs7_digest:
141 if (p7->d.digest->contents != NULL)
142 PKCS7_free(p7->d.digest->contents);
143 p7->d.digest->contents = p7_data;
144 break;
145 case NID_pkcs7_data:
146 case NID_pkcs7_enveloped:
147 case NID_pkcs7_signedAndEnveloped:
148 case NID_pkcs7_encrypted:
149 default:
150 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
151 goto err;
152 }
153 return (1);
154 err:
155 return (0);
156 }
157
PKCS7_set_type(PKCS7 * p7,int type)158 int PKCS7_set_type(PKCS7 *p7, int type)
159 {
160 ASN1_OBJECT *obj;
161
162 /*
163 * PKCS7_content_free(p7);
164 */
165 obj = OBJ_nid2obj(type); /* will not fail */
166
167 switch (type) {
168 case NID_pkcs7_signed:
169 p7->type = obj;
170 if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
171 goto err;
172 if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
173 PKCS7_SIGNED_free(p7->d.sign);
174 p7->d.sign = NULL;
175 goto err;
176 }
177 break;
178 case NID_pkcs7_data:
179 p7->type = obj;
180 if ((p7->d.data = M_ASN1_OCTET_STRING_new()) == NULL)
181 goto err;
182 break;
183 case NID_pkcs7_signedAndEnveloped:
184 p7->type = obj;
185 if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
186 == NULL)
187 goto err;
188 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
189 goto err;
190 p7->d.signed_and_enveloped->enc_data->content_type
191 = OBJ_nid2obj(NID_pkcs7_data);
192 break;
193 case NID_pkcs7_enveloped:
194 p7->type = obj;
195 if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
196 == NULL)
197 goto err;
198 if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
199 goto err;
200 p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
201 break;
202 case NID_pkcs7_encrypted:
203 p7->type = obj;
204 if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
205 == NULL)
206 goto err;
207 if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
208 goto err;
209 p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
210 break;
211
212 case NID_pkcs7_digest:
213 p7->type = obj;
214 if ((p7->d.digest = PKCS7_DIGEST_new())
215 == NULL)
216 goto err;
217 if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
218 goto err;
219 break;
220 default:
221 PKCS7err(PKCS7_F_PKCS7_SET_TYPE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
222 goto err;
223 }
224 return (1);
225 err:
226 return (0);
227 }
228
PKCS7_set0_type_other(PKCS7 * p7,int type,ASN1_TYPE * other)229 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
230 {
231 p7->type = OBJ_nid2obj(type);
232 p7->d.other = other;
233 return 1;
234 }
235
PKCS7_add_signer(PKCS7 * p7,PKCS7_SIGNER_INFO * psi)236 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
237 {
238 int i, j, nid;
239 X509_ALGOR *alg;
240 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
241 STACK_OF(X509_ALGOR) *md_sk;
242
243 i = OBJ_obj2nid(p7->type);
244 switch (i) {
245 case NID_pkcs7_signed:
246 signer_sk = p7->d.sign->signer_info;
247 md_sk = p7->d.sign->md_algs;
248 break;
249 case NID_pkcs7_signedAndEnveloped:
250 signer_sk = p7->d.signed_and_enveloped->signer_info;
251 md_sk = p7->d.signed_and_enveloped->md_algs;
252 break;
253 default:
254 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, PKCS7_R_WRONG_CONTENT_TYPE);
255 return (0);
256 }
257
258 nid = OBJ_obj2nid(psi->digest_alg->algorithm);
259
260 /* If the digest is not currently listed, add it */
261 j = 0;
262 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
263 alg = sk_X509_ALGOR_value(md_sk, i);
264 if (OBJ_obj2nid(alg->algorithm) == nid) {
265 j = 1;
266 break;
267 }
268 }
269 if (!j) { /* we need to add another algorithm */
270 if (!(alg = X509_ALGOR_new())
271 || !(alg->parameter = ASN1_TYPE_new())) {
272 X509_ALGOR_free(alg);
273 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
274 return (0);
275 }
276 alg->algorithm = OBJ_nid2obj(nid);
277 alg->parameter->type = V_ASN1_NULL;
278 if (!sk_X509_ALGOR_push(md_sk, alg)) {
279 X509_ALGOR_free(alg);
280 return 0;
281 }
282 }
283
284 if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
285 return 0;
286 return (1);
287 }
288
PKCS7_add_certificate(PKCS7 * p7,X509 * x509)289 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
290 {
291 int i;
292 STACK_OF(X509) **sk;
293
294 i = OBJ_obj2nid(p7->type);
295 switch (i) {
296 case NID_pkcs7_signed:
297 sk = &(p7->d.sign->cert);
298 break;
299 case NID_pkcs7_signedAndEnveloped:
300 sk = &(p7->d.signed_and_enveloped->cert);
301 break;
302 default:
303 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, PKCS7_R_WRONG_CONTENT_TYPE);
304 return (0);
305 }
306
307 if (*sk == NULL)
308 *sk = sk_X509_new_null();
309 if (*sk == NULL) {
310 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, ERR_R_MALLOC_FAILURE);
311 return 0;
312 }
313 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
314 if (!sk_X509_push(*sk, x509)) {
315 X509_free(x509);
316 return 0;
317 }
318 return (1);
319 }
320
PKCS7_add_crl(PKCS7 * p7,X509_CRL * crl)321 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
322 {
323 int i;
324 STACK_OF(X509_CRL) **sk;
325
326 i = OBJ_obj2nid(p7->type);
327 switch (i) {
328 case NID_pkcs7_signed:
329 sk = &(p7->d.sign->crl);
330 break;
331 case NID_pkcs7_signedAndEnveloped:
332 sk = &(p7->d.signed_and_enveloped->crl);
333 break;
334 default:
335 PKCS7err(PKCS7_F_PKCS7_ADD_CRL, PKCS7_R_WRONG_CONTENT_TYPE);
336 return (0);
337 }
338
339 if (*sk == NULL)
340 *sk = sk_X509_CRL_new_null();
341 if (*sk == NULL) {
342 PKCS7err(PKCS7_F_PKCS7_ADD_CRL, ERR_R_MALLOC_FAILURE);
343 return 0;
344 }
345
346 CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
347 if (!sk_X509_CRL_push(*sk, crl)) {
348 X509_CRL_free(crl);
349 return 0;
350 }
351 return (1);
352 }
353
PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO * p7i,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)354 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
355 const EVP_MD *dgst)
356 {
357 int ret;
358
359 /* We now need to add another PKCS7_SIGNER_INFO entry */
360 if (!ASN1_INTEGER_set(p7i->version, 1))
361 goto err;
362 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
363 X509_get_issuer_name(x509)))
364 goto err;
365
366 /*
367 * because ASN1_INTEGER_set is used to set a 'long' we will do things the
368 * ugly way.
369 */
370 M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
371 if (!(p7i->issuer_and_serial->serial =
372 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
373 goto err;
374
375 /* lets keep the pkey around for a while */
376 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
377 p7i->pkey = pkey;
378
379 /* Set the algorithms */
380
381 X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
382 V_ASN1_NULL, NULL);
383
384 if (pkey->ameth && pkey->ameth->pkey_ctrl) {
385 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
386 if (ret > 0)
387 return 1;
388 if (ret != -2) {
389 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
390 PKCS7_R_SIGNING_CTRL_FAILURE);
391 return 0;
392 }
393 }
394 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
395 PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
396 err:
397 return 0;
398 }
399
PKCS7_add_signature(PKCS7 * p7,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)400 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
401 const EVP_MD *dgst)
402 {
403 PKCS7_SIGNER_INFO *si = NULL;
404
405 if (dgst == NULL) {
406 int def_nid;
407 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
408 goto err;
409 dgst = EVP_get_digestbynid(def_nid);
410 if (dgst == NULL) {
411 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNATURE, PKCS7_R_NO_DEFAULT_DIGEST);
412 goto err;
413 }
414 }
415
416 if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
417 goto err;
418 if (!PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst))
419 goto err;
420 if (!PKCS7_add_signer(p7, si))
421 goto err;
422 return (si);
423 err:
424 if (si)
425 PKCS7_SIGNER_INFO_free(si);
426 return (NULL);
427 }
428
PKCS7_set_digest(PKCS7 * p7,const EVP_MD * md)429 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
430 {
431 if (PKCS7_type_is_digest(p7)) {
432 if (!(p7->d.digest->md->parameter = ASN1_TYPE_new())) {
433 PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, ERR_R_MALLOC_FAILURE);
434 return 0;
435 }
436 p7->d.digest->md->parameter->type = V_ASN1_NULL;
437 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
438 return 1;
439 }
440
441 PKCS7err(PKCS7_F_PKCS7_SET_DIGEST, PKCS7_R_WRONG_CONTENT_TYPE);
442 return 1;
443 }
444
STACK_OF(PKCS7_SIGNER_INFO)445 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
446 {
447 if (p7 == NULL || p7->d.ptr == NULL)
448 return NULL;
449 if (PKCS7_type_is_signed(p7)) {
450 return (p7->d.sign->signer_info);
451 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
452 return (p7->d.signed_and_enveloped->signer_info);
453 } else
454 return (NULL);
455 }
456
PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO * si,EVP_PKEY ** pk,X509_ALGOR ** pdig,X509_ALGOR ** psig)457 void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
458 X509_ALGOR **pdig, X509_ALGOR **psig)
459 {
460 if (pk)
461 *pk = si->pkey;
462 if (pdig)
463 *pdig = si->digest_alg;
464 if (psig)
465 *psig = si->digest_enc_alg;
466 }
467
PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO * ri,X509_ALGOR ** penc)468 void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
469 {
470 if (penc)
471 *penc = ri->key_enc_algor;
472 }
473
PKCS7_add_recipient(PKCS7 * p7,X509 * x509)474 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
475 {
476 PKCS7_RECIP_INFO *ri;
477
478 if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
479 goto err;
480 if (!PKCS7_RECIP_INFO_set(ri, x509))
481 goto err;
482 if (!PKCS7_add_recipient_info(p7, ri))
483 goto err;
484 return ri;
485 err:
486 if (ri)
487 PKCS7_RECIP_INFO_free(ri);
488 return NULL;
489 }
490
PKCS7_add_recipient_info(PKCS7 * p7,PKCS7_RECIP_INFO * ri)491 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
492 {
493 int i;
494 STACK_OF(PKCS7_RECIP_INFO) *sk;
495
496 i = OBJ_obj2nid(p7->type);
497 switch (i) {
498 case NID_pkcs7_signedAndEnveloped:
499 sk = p7->d.signed_and_enveloped->recipientinfo;
500 break;
501 case NID_pkcs7_enveloped:
502 sk = p7->d.enveloped->recipientinfo;
503 break;
504 default:
505 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,
506 PKCS7_R_WRONG_CONTENT_TYPE);
507 return (0);
508 }
509
510 if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
511 return 0;
512 return (1);
513 }
514
PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO * p7i,X509 * x509)515 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
516 {
517 int ret;
518 EVP_PKEY *pkey = NULL;
519 if (!ASN1_INTEGER_set(p7i->version, 0))
520 return 0;
521 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
522 X509_get_issuer_name(x509)))
523 return 0;
524
525 M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
526 if (!(p7i->issuer_and_serial->serial =
527 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
528 return 0;
529
530 pkey = X509_get_pubkey(x509);
531
532 if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl) {
533 PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
534 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
535 goto err;
536 }
537
538 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
539 if (ret == -2) {
540 PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
541 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
542 goto err;
543 }
544 if (ret <= 0) {
545 PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
546 PKCS7_R_ENCRYPTION_CTRL_FAILURE);
547 goto err;
548 }
549
550 EVP_PKEY_free(pkey);
551
552 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
553 p7i->cert = x509;
554
555 return 1;
556
557 err:
558 if (pkey)
559 EVP_PKEY_free(pkey);
560 return 0;
561 }
562
PKCS7_cert_from_signer_info(PKCS7 * p7,PKCS7_SIGNER_INFO * si)563 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
564 {
565 if (PKCS7_type_is_signed(p7))
566 return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
567 si->issuer_and_serial->issuer,
568 si->
569 issuer_and_serial->serial));
570 else
571 return (NULL);
572 }
573
PKCS7_set_cipher(PKCS7 * p7,const EVP_CIPHER * cipher)574 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
575 {
576 int i;
577 PKCS7_ENC_CONTENT *ec;
578
579 i = OBJ_obj2nid(p7->type);
580 switch (i) {
581 case NID_pkcs7_signedAndEnveloped:
582 ec = p7->d.signed_and_enveloped->enc_data;
583 break;
584 case NID_pkcs7_enveloped:
585 ec = p7->d.enveloped->enc_data;
586 break;
587 default:
588 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER, PKCS7_R_WRONG_CONTENT_TYPE);
589 return (0);
590 }
591
592 /* Check cipher OID exists and has data in it */
593 i = EVP_CIPHER_type(cipher);
594 if (i == NID_undef) {
595 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,
596 PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
597 return (0);
598 }
599
600 ec->cipher = cipher;
601 return 1;
602 }
603
PKCS7_stream(unsigned char *** boundary,PKCS7 * p7)604 int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
605 {
606 ASN1_OCTET_STRING *os = NULL;
607
608 switch (OBJ_obj2nid(p7->type)) {
609 case NID_pkcs7_data:
610 os = p7->d.data;
611 break;
612
613 case NID_pkcs7_signedAndEnveloped:
614 os = p7->d.signed_and_enveloped->enc_data->enc_data;
615 if (os == NULL) {
616 os = M_ASN1_OCTET_STRING_new();
617 p7->d.signed_and_enveloped->enc_data->enc_data = os;
618 }
619 break;
620
621 case NID_pkcs7_enveloped:
622 os = p7->d.enveloped->enc_data->enc_data;
623 if (os == NULL) {
624 os = M_ASN1_OCTET_STRING_new();
625 p7->d.enveloped->enc_data->enc_data = os;
626 }
627 break;
628
629 case NID_pkcs7_signed:
630 os = p7->d.sign->contents->d.data;
631 break;
632
633 default:
634 os = NULL;
635 break;
636 }
637
638 if (os == NULL)
639 return 0;
640
641 os->flags |= ASN1_STRING_FLAG_NDEF;
642 *boundary = &os->data;
643
644 return 1;
645 }
646