1 /* $OpenBSD: pk7_lib.c,v 1.23 2021/12/12 21:30:14 tb Exp $ */
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
61 #include <openssl/err.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64
65 #include "asn1_locl.h"
66 #include "evp_locl.h"
67 #include "x509_lcl.h"
68
69 long
PKCS7_ctrl(PKCS7 * p7,int cmd,long larg,char * parg)70 PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
71 {
72 int nid;
73 long ret;
74
75 nid = OBJ_obj2nid(p7->type);
76
77 switch (cmd) {
78 case PKCS7_OP_SET_DETACHED_SIGNATURE:
79 if (nid == NID_pkcs7_signed) {
80 ret = p7->detached = (int)larg;
81 if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
82 ASN1_OCTET_STRING *os;
83 os = p7->d.sign->contents->d.data;
84 ASN1_OCTET_STRING_free(os);
85 p7->d.sign->contents->d.data = NULL;
86 }
87 } else {
88 PKCS7error(PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
89 ret = 0;
90 }
91 break;
92 case PKCS7_OP_GET_DETACHED_SIGNATURE:
93 if (nid == NID_pkcs7_signed) {
94 if (!p7->d.sign || !p7->d.sign->contents->d.ptr)
95 ret = 1;
96 else
97 ret = 0;
98
99 p7->detached = ret;
100 } else {
101 PKCS7error(PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
102 ret = 0;
103 }
104
105 break;
106 default:
107 PKCS7error(PKCS7_R_UNKNOWN_OPERATION);
108 ret = 0;
109 }
110 return (ret);
111 }
112
113 int
PKCS7_content_new(PKCS7 * p7,int type)114 PKCS7_content_new(PKCS7 *p7, int type)
115 {
116 PKCS7 *ret = NULL;
117
118 if ((ret = PKCS7_new()) == NULL)
119 goto err;
120 if (!PKCS7_set_type(ret, type))
121 goto err;
122 if (!PKCS7_set_content(p7, ret))
123 goto err;
124
125 return (1);
126 err:
127 if (ret != NULL)
128 PKCS7_free(ret);
129 return (0);
130 }
131
132 int
PKCS7_set_content(PKCS7 * p7,PKCS7 * p7_data)133 PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
134 {
135 int i;
136
137 i = OBJ_obj2nid(p7->type);
138 switch (i) {
139 case NID_pkcs7_signed:
140 if (p7->d.sign->contents != NULL)
141 PKCS7_free(p7->d.sign->contents);
142 p7->d.sign->contents = p7_data;
143 break;
144 case NID_pkcs7_digest:
145 if (p7->d.digest->contents != NULL)
146 PKCS7_free(p7->d.digest->contents);
147 p7->d.digest->contents = p7_data;
148 break;
149 case NID_pkcs7_data:
150 case NID_pkcs7_enveloped:
151 case NID_pkcs7_signedAndEnveloped:
152 case NID_pkcs7_encrypted:
153 default:
154 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
155 goto err;
156 }
157 return (1);
158 err:
159 return (0);
160 }
161
162 int
PKCS7_set_type(PKCS7 * p7,int type)163 PKCS7_set_type(PKCS7 *p7, int type)
164 {
165 ASN1_OBJECT *obj;
166
167 /*PKCS7_content_free(p7);*/
168 obj=OBJ_nid2obj(type); /* will not fail */
169
170 switch (type) {
171 case NID_pkcs7_signed:
172 p7->type = obj;
173 if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
174 goto err;
175 if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
176 PKCS7_SIGNED_free(p7->d.sign);
177 p7->d.sign = NULL;
178 goto err;
179 }
180 break;
181 case NID_pkcs7_data:
182 p7->type = obj;
183 if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
184 goto err;
185 break;
186 case NID_pkcs7_signedAndEnveloped:
187 p7->type = obj;
188 if ((p7->d.signed_and_enveloped =
189 PKCS7_SIGN_ENVELOPE_new()) == NULL)
190 goto err;
191 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
192 goto err;
193 p7->d.signed_and_enveloped->enc_data->content_type =
194 OBJ_nid2obj(NID_pkcs7_data);
195 break;
196 case NID_pkcs7_enveloped:
197 p7->type = obj;
198 if ((p7->d.enveloped = PKCS7_ENVELOPE_new()) == NULL)
199 goto err;
200 if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
201 goto err;
202 p7->d.enveloped->enc_data->content_type =
203 OBJ_nid2obj(NID_pkcs7_data);
204 break;
205 case NID_pkcs7_encrypted:
206 p7->type = obj;
207 if ((p7->d.encrypted = PKCS7_ENCRYPT_new()) == NULL)
208 goto err;
209 if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
210 goto err;
211 p7->d.encrypted->enc_data->content_type =
212 OBJ_nid2obj(NID_pkcs7_data);
213 break;
214
215 case NID_pkcs7_digest:
216 p7->type = obj;
217 if ((p7->d.digest = PKCS7_DIGEST_new()) == NULL)
218 goto err;
219 if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
220 goto err;
221 break;
222 default:
223 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
224 goto err;
225 }
226 return (1);
227 err:
228 return (0);
229 }
230
231 int
PKCS7_set0_type_other(PKCS7 * p7,int type,ASN1_TYPE * other)232 PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
233 {
234 p7->type = OBJ_nid2obj(type);
235 p7->d.other = other;
236 return 1;
237 }
238
239 int
PKCS7_add_signer(PKCS7 * p7,PKCS7_SIGNER_INFO * psi)240 PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
241 {
242 int i, j, nid;
243 X509_ALGOR *alg;
244 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
245 STACK_OF(X509_ALGOR) *md_sk;
246
247 i = OBJ_obj2nid(p7->type);
248 switch (i) {
249 case NID_pkcs7_signed:
250 signer_sk = p7->d.sign->signer_info;
251 md_sk = p7->d.sign->md_algs;
252 break;
253 case NID_pkcs7_signedAndEnveloped:
254 signer_sk = p7->d.signed_and_enveloped->signer_info;
255 md_sk = p7->d.signed_and_enveloped->md_algs;
256 break;
257 default:
258 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
259 return (0);
260 }
261
262 nid = OBJ_obj2nid(psi->digest_alg->algorithm);
263
264 /* If the digest is not currently listed, add it */
265 j = 0;
266 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
267 alg = sk_X509_ALGOR_value(md_sk, i);
268 if (OBJ_obj2nid(alg->algorithm) == nid) {
269 j = 1;
270 break;
271 }
272 }
273 if (!j) /* we need to add another algorithm */
274 {
275 if (!(alg = X509_ALGOR_new()) ||
276 !(alg->parameter = ASN1_TYPE_new())) {
277 X509_ALGOR_free(alg);
278 PKCS7error(ERR_R_MALLOC_FAILURE);
279 return (0);
280 }
281 alg->algorithm = OBJ_nid2obj(nid);
282 alg->parameter->type = V_ASN1_NULL;
283 if (!sk_X509_ALGOR_push(md_sk, alg)) {
284 X509_ALGOR_free(alg);
285 return 0;
286 }
287 }
288
289 if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
290 return 0;
291 return (1);
292 }
293
294 int
PKCS7_add_certificate(PKCS7 * p7,X509 * x509)295 PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
296 {
297 int i;
298 STACK_OF(X509) **sk;
299
300 i = OBJ_obj2nid(p7->type);
301 switch (i) {
302 case NID_pkcs7_signed:
303 sk = &(p7->d.sign->cert);
304 break;
305 case NID_pkcs7_signedAndEnveloped:
306 sk = &(p7->d.signed_and_enveloped->cert);
307 break;
308 default:
309 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
310 return (0);
311 }
312
313 if (*sk == NULL)
314 *sk = sk_X509_new_null();
315 if (*sk == NULL) {
316 PKCS7error(ERR_R_MALLOC_FAILURE);
317 return 0;
318 }
319 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
320 if (!sk_X509_push(*sk, x509)) {
321 X509_free(x509);
322 return 0;
323 }
324 return (1);
325 }
326
327 int
PKCS7_add_crl(PKCS7 * p7,X509_CRL * crl)328 PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
329 {
330 int i;
331 STACK_OF(X509_CRL) **sk;
332
333 i = OBJ_obj2nid(p7->type);
334 switch (i) {
335 case NID_pkcs7_signed:
336 sk = &(p7->d.sign->crl);
337 break;
338 case NID_pkcs7_signedAndEnveloped:
339 sk = &(p7->d.signed_and_enveloped->crl);
340 break;
341 default:
342 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
343 return (0);
344 }
345
346 if (*sk == NULL)
347 *sk = sk_X509_CRL_new_null();
348 if (*sk == NULL) {
349 PKCS7error(ERR_R_MALLOC_FAILURE);
350 return 0;
351 }
352
353 CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
354 if (!sk_X509_CRL_push(*sk, crl)) {
355 X509_CRL_free(crl);
356 return 0;
357 }
358 return (1);
359 }
360
361 int
PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO * p7i,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)362 PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
363 const EVP_MD *dgst)
364 {
365 int ret;
366
367 /* We now need to add another PKCS7_SIGNER_INFO entry */
368 if (!ASN1_INTEGER_set(p7i->version, 1))
369 goto err;
370 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
371 X509_get_issuer_name(x509)))
372 goto err;
373
374 /* because ASN1_INTEGER_set is used to set a 'long' we will do
375 * things the ugly way. */
376 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
377 if (!(p7i->issuer_and_serial->serial =
378 ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
379 goto err;
380
381 /* lets keep the pkey around for a while */
382 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
383 p7i->pkey = pkey;
384
385 /* Set the algorithms */
386
387 X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
388 V_ASN1_NULL, NULL);
389
390 if (pkey->ameth && pkey->ameth->pkey_ctrl) {
391 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN,
392 0, p7i);
393 if (ret > 0)
394 return 1;
395 if (ret != -2) {
396 PKCS7error(PKCS7_R_SIGNING_CTRL_FAILURE);
397 return 0;
398 }
399 }
400 PKCS7error(PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
401 err:
402 return 0;
403 }
404
405 PKCS7_SIGNER_INFO *
PKCS7_add_signature(PKCS7 * p7,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)406 PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey, const EVP_MD *dgst)
407 {
408 PKCS7_SIGNER_INFO *si = NULL;
409
410 if (dgst == NULL) {
411 int def_nid;
412 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
413 goto err;
414 dgst = EVP_get_digestbynid(def_nid);
415 if (dgst == NULL) {
416 PKCS7error(PKCS7_R_NO_DEFAULT_DIGEST);
417 goto err;
418 }
419 }
420
421 if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
422 goto err;
423 if (!PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst))
424 goto err;
425 if (!PKCS7_add_signer(p7, si))
426 goto err;
427 return (si);
428 err:
429 if (si)
430 PKCS7_SIGNER_INFO_free(si);
431 return (NULL);
432 }
433
434 int
PKCS7_set_digest(PKCS7 * p7,const EVP_MD * md)435 PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
436 {
437 if (PKCS7_type_is_digest(p7)) {
438 if (!(p7->d.digest->md->parameter = ASN1_TYPE_new())) {
439 PKCS7error(ERR_R_MALLOC_FAILURE);
440 return 0;
441 }
442 p7->d.digest->md->parameter->type = V_ASN1_NULL;
443 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
444 return 1;
445 }
446
447 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
448 return 1;
449 }
450
STACK_OF(PKCS7_SIGNER_INFO)451 STACK_OF(PKCS7_SIGNER_INFO) *
452 PKCS7_get_signer_info(PKCS7 *p7)
453 {
454 if (p7 == NULL || p7->d.ptr == NULL)
455 return (NULL);
456 if (PKCS7_type_is_signed(p7)) {
457 return (p7->d.sign->signer_info);
458 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
459 return (p7->d.signed_and_enveloped->signer_info);
460 } else
461 return (NULL);
462 }
463
464 void
PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO * si,EVP_PKEY ** pk,X509_ALGOR ** pdig,X509_ALGOR ** psig)465 PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
466 X509_ALGOR **pdig, X509_ALGOR **psig)
467 {
468 if (pk)
469 *pk = si->pkey;
470 if (pdig)
471 *pdig = si->digest_alg;
472 if (psig)
473 *psig = si->digest_enc_alg;
474 }
475
476 void
PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO * ri,X509_ALGOR ** penc)477 PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
478 {
479 if (penc)
480 *penc = ri->key_enc_algor;
481 }
482
483 PKCS7_RECIP_INFO *
PKCS7_add_recipient(PKCS7 * p7,X509 * x509)484 PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
485 {
486 PKCS7_RECIP_INFO *ri;
487
488 if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
489 goto err;
490 if (!PKCS7_RECIP_INFO_set(ri, x509))
491 goto err;
492 if (!PKCS7_add_recipient_info(p7, ri))
493 goto err;
494 return ri;
495 err:
496 if (ri)
497 PKCS7_RECIP_INFO_free(ri);
498 return NULL;
499 }
500
501 int
PKCS7_add_recipient_info(PKCS7 * p7,PKCS7_RECIP_INFO * ri)502 PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
503 {
504 int i;
505 STACK_OF(PKCS7_RECIP_INFO) *sk;
506
507 i = OBJ_obj2nid(p7->type);
508 switch (i) {
509 case NID_pkcs7_signedAndEnveloped:
510 sk = p7->d.signed_and_enveloped->recipientinfo;
511 break;
512 case NID_pkcs7_enveloped:
513 sk = p7->d.enveloped->recipientinfo;
514 break;
515 default:
516 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
517 return (0);
518 }
519
520 if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
521 return 0;
522 return (1);
523 }
524
525 int
PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO * p7i,X509 * x509)526 PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
527 {
528 int ret;
529 EVP_PKEY *pkey = NULL;
530 if (!ASN1_INTEGER_set(p7i->version, 0))
531 return 0;
532 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
533 X509_get_issuer_name(x509)))
534 return 0;
535
536 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
537 if (!(p7i->issuer_and_serial->serial =
538 ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
539 return 0;
540
541 pkey = X509_get_pubkey(x509);
542
543 if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl) {
544 PKCS7error(PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
545 goto err;
546 }
547
548 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT,
549 0, p7i);
550 if (ret == -2) {
551 PKCS7error(PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
552 goto err;
553 }
554 if (ret <= 0) {
555 PKCS7error(PKCS7_R_ENCRYPTION_CTRL_FAILURE);
556 goto err;
557 }
558
559 EVP_PKEY_free(pkey);
560
561 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509);
562 p7i->cert = x509;
563
564 return 1;
565
566 err:
567 EVP_PKEY_free(pkey);
568 return 0;
569 }
570
571 X509 *
PKCS7_cert_from_signer_info(PKCS7 * p7,PKCS7_SIGNER_INFO * si)572 PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
573 {
574 if (PKCS7_type_is_signed(p7))
575 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
576 si->issuer_and_serial->issuer,
577 si->issuer_and_serial->serial));
578 else
579 return (NULL);
580 }
581
582 int
PKCS7_set_cipher(PKCS7 * p7,const EVP_CIPHER * cipher)583 PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
584 {
585 int i;
586 PKCS7_ENC_CONTENT *ec;
587
588 i = OBJ_obj2nid(p7->type);
589 switch (i) {
590 case NID_pkcs7_signedAndEnveloped:
591 ec = p7->d.signed_and_enveloped->enc_data;
592 break;
593 case NID_pkcs7_enveloped:
594 ec = p7->d.enveloped->enc_data;
595 break;
596 default:
597 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE);
598 return (0);
599 }
600
601 /* Check cipher OID exists and has data in it*/
602 i = EVP_CIPHER_type(cipher);
603 if (i == NID_undef) {
604 PKCS7error(PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
605 return (0);
606 }
607
608 ec->cipher = cipher;
609 return 1;
610 }
611
612 int
PKCS7_stream(unsigned char *** boundary,PKCS7 * p7)613 PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
614 {
615 ASN1_OCTET_STRING *os = NULL;
616
617 switch (OBJ_obj2nid(p7->type)) {
618 case NID_pkcs7_data:
619 os = p7->d.data;
620 break;
621
622 case NID_pkcs7_signedAndEnveloped:
623 os = p7->d.signed_and_enveloped->enc_data->enc_data;
624 if (os == NULL) {
625 os = ASN1_OCTET_STRING_new();
626 p7->d.signed_and_enveloped->enc_data->enc_data = os;
627 }
628 break;
629
630 case NID_pkcs7_enveloped:
631 os = p7->d.enveloped->enc_data->enc_data;
632 if (os == NULL) {
633 os = ASN1_OCTET_STRING_new();
634 p7->d.enveloped->enc_data->enc_data = os;
635 }
636 break;
637
638 case NID_pkcs7_signed:
639 os = p7->d.sign->contents->d.data;
640 break;
641
642 default:
643 os = NULL;
644 break;
645 }
646
647 if (os == NULL)
648 return 0;
649
650 os->flags |= ASN1_STRING_FLAG_NDEF;
651 *boundary = &os->data;
652
653 return 1;
654 }
655