1 /* crypto/pkcs7/pk7_doit.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/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65 #include <openssl/err.h>
66
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
68 void *value);
69 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
70
PKCS7_type_is_other(PKCS7 * p7)71 static int PKCS7_type_is_other(PKCS7* p7)
72 {
73 int isOther=1;
74
75 int nid=OBJ_obj2nid(p7->type);
76
77 switch( nid )
78 {
79 case NID_pkcs7_data:
80 case NID_pkcs7_signed:
81 case NID_pkcs7_enveloped:
82 case NID_pkcs7_signedAndEnveloped:
83 case NID_pkcs7_digest:
84 case NID_pkcs7_encrypted:
85 isOther=0;
86 break;
87 default:
88 isOther=1;
89 }
90
91 return isOther;
92
93 }
94
PKCS7_get_octet_string(PKCS7 * p7)95 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
96 {
97 if ( PKCS7_type_is_data(p7))
98 return p7->d.data;
99 if ( PKCS7_type_is_other(p7) && p7->d.other
100 && (p7->d.other->type == V_ASN1_OCTET_STRING))
101 return p7->d.other->value.octet_string;
102 return NULL;
103 }
104
PKCS7_bio_add_digest(BIO ** pbio,X509_ALGOR * alg)105 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
106 {
107 BIO *btmp;
108 const EVP_MD *md;
109 if ((btmp=BIO_new(BIO_f_md())) == NULL)
110 {
111 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
112 goto err;
113 }
114
115 md=EVP_get_digestbyobj(alg->algorithm);
116 if (md == NULL)
117 {
118 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
119 goto err;
120 }
121
122 BIO_set_md(btmp,md);
123 if (*pbio == NULL)
124 *pbio=btmp;
125 else if (!BIO_push(*pbio,btmp))
126 {
127 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
128 goto err;
129 }
130 btmp=NULL;
131
132 return 1;
133
134 err:
135 if (btmp)
136 BIO_free(btmp);
137 return 0;
138
139 }
140
pkcs7_encode_rinfo(PKCS7_RECIP_INFO * ri,unsigned char * key,int keylen)141 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
142 unsigned char *key, int keylen)
143 {
144 EVP_PKEY_CTX *pctx = NULL;
145 EVP_PKEY *pkey = NULL;
146 unsigned char *ek = NULL;
147 int ret = 0;
148 size_t eklen;
149
150 pkey = X509_get_pubkey(ri->cert);
151
152 if (!pkey)
153 return 0;
154
155 pctx = EVP_PKEY_CTX_new(pkey, NULL);
156 if (!pctx)
157 return 0;
158
159 if (EVP_PKEY_encrypt_init(pctx) <= 0)
160 goto err;
161
162 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
163 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0)
164 {
165 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
166 goto err;
167 }
168
169 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
170 goto err;
171
172 ek = OPENSSL_malloc(eklen);
173
174 if (ek == NULL)
175 {
176 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
177 goto err;
178 }
179
180 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
181 goto err;
182
183 ASN1_STRING_set0(ri->enc_key, ek, eklen);
184 ek = NULL;
185
186 ret = 1;
187
188 err:
189 if (pkey)
190 EVP_PKEY_free(pkey);
191 if (pctx)
192 EVP_PKEY_CTX_free(pctx);
193 if (ek)
194 OPENSSL_free(ek);
195 return ret;
196
197 }
198
199
pkcs7_decrypt_rinfo(unsigned char ** pek,int * peklen,PKCS7_RECIP_INFO * ri,EVP_PKEY * pkey)200 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
201 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
202 {
203 EVP_PKEY_CTX *pctx = NULL;
204 unsigned char *ek = NULL;
205 size_t eklen;
206
207 int ret = 0;
208
209 pctx = EVP_PKEY_CTX_new(pkey, NULL);
210 if (!pctx)
211 return 0;
212
213 if (EVP_PKEY_decrypt_init(pctx) <= 0)
214 goto err;
215
216 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
217 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0)
218 {
219 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
220 goto err;
221 }
222
223 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
224 ri->enc_key->data, ri->enc_key->length) <= 0)
225 goto err;
226
227 ek = OPENSSL_malloc(eklen);
228
229 if (ek == NULL)
230 {
231 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
232 goto err;
233 }
234
235 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
236 ri->enc_key->data, ri->enc_key->length) <= 0)
237 {
238 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
239 goto err;
240 }
241
242 ret = 1;
243
244 *pek = ek;
245 *peklen = eklen;
246
247 err:
248 if (pctx)
249 EVP_PKEY_CTX_free(pctx);
250 if (!ret && ek)
251 OPENSSL_free(ek);
252
253 return ret;
254 }
255
PKCS7_dataInit(PKCS7 * p7,BIO * bio)256 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
257 {
258 int i;
259 BIO *out=NULL,*btmp=NULL;
260 X509_ALGOR *xa = NULL;
261 const EVP_CIPHER *evp_cipher=NULL;
262 STACK_OF(X509_ALGOR) *md_sk=NULL;
263 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
264 X509_ALGOR *xalg=NULL;
265 PKCS7_RECIP_INFO *ri=NULL;
266 ASN1_OCTET_STRING *os=NULL;
267
268 i=OBJ_obj2nid(p7->type);
269 p7->state=PKCS7_S_HEADER;
270
271 switch (i)
272 {
273 case NID_pkcs7_signed:
274 md_sk=p7->d.sign->md_algs;
275 os = PKCS7_get_octet_string(p7->d.sign->contents);
276 break;
277 case NID_pkcs7_signedAndEnveloped:
278 rsk=p7->d.signed_and_enveloped->recipientinfo;
279 md_sk=p7->d.signed_and_enveloped->md_algs;
280 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
281 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
282 if (evp_cipher == NULL)
283 {
284 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
285 PKCS7_R_CIPHER_NOT_INITIALIZED);
286 goto err;
287 }
288 break;
289 case NID_pkcs7_enveloped:
290 rsk=p7->d.enveloped->recipientinfo;
291 xalg=p7->d.enveloped->enc_data->algorithm;
292 evp_cipher=p7->d.enveloped->enc_data->cipher;
293 if (evp_cipher == NULL)
294 {
295 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
296 PKCS7_R_CIPHER_NOT_INITIALIZED);
297 goto err;
298 }
299 break;
300 case NID_pkcs7_digest:
301 xa = p7->d.digest->md;
302 os = PKCS7_get_octet_string(p7->d.digest->contents);
303 break;
304 case NID_pkcs7_data:
305 break;
306 default:
307 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
308 goto err;
309 }
310
311 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
312 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
313 goto err;
314
315 if (xa && !PKCS7_bio_add_digest(&out, xa))
316 goto err;
317
318 if (evp_cipher != NULL)
319 {
320 unsigned char key[EVP_MAX_KEY_LENGTH];
321 unsigned char iv[EVP_MAX_IV_LENGTH];
322 int keylen,ivlen;
323 EVP_CIPHER_CTX *ctx;
324
325 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
326 {
327 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
328 goto err;
329 }
330 BIO_get_cipher_ctx(btmp, &ctx);
331 keylen=EVP_CIPHER_key_length(evp_cipher);
332 ivlen=EVP_CIPHER_iv_length(evp_cipher);
333 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
334 if (ivlen > 0)
335 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
336 goto err;
337 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
338 goto err;
339 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
340 goto err;
341 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
342 goto err;
343
344 if (ivlen > 0) {
345 if (xalg->parameter == NULL) {
346 xalg->parameter = ASN1_TYPE_new();
347 if (xalg->parameter == NULL)
348 goto err;
349 }
350 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
351 goto err;
352 }
353
354 /* Lets do the pub key stuff :-) */
355 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
356 {
357 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
358 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
359 goto err;
360 }
361 OPENSSL_cleanse(key, keylen);
362
363 if (out == NULL)
364 out=btmp;
365 else
366 BIO_push(out,btmp);
367 btmp=NULL;
368 }
369
370 if (bio == NULL)
371 {
372 if (PKCS7_is_detached(p7))
373 bio=BIO_new(BIO_s_null());
374 else if (os && os->length > 0)
375 bio = BIO_new_mem_buf(os->data, os->length);
376 if(bio == NULL)
377 {
378 bio=BIO_new(BIO_s_mem());
379 if (bio == NULL)
380 goto err;
381 BIO_set_mem_eof_return(bio,0);
382 }
383 }
384 if (out)
385 BIO_push(out,bio);
386 else
387 out = bio;
388 bio=NULL;
389 if (0)
390 {
391 err:
392 if (out != NULL)
393 BIO_free_all(out);
394 if (btmp != NULL)
395 BIO_free_all(btmp);
396 out=NULL;
397 }
398 return(out);
399 }
400
pkcs7_cmp_ri(PKCS7_RECIP_INFO * ri,X509 * pcert)401 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
402 {
403 int ret;
404 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
405 pcert->cert_info->issuer);
406 if (ret)
407 return ret;
408 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
409 ri->issuer_and_serial->serial);
410 }
411
412 /* int */
PKCS7_dataDecode(PKCS7 * p7,EVP_PKEY * pkey,BIO * in_bio,X509 * pcert)413 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
414 {
415 int i,j;
416 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
417 X509_ALGOR *xa;
418 ASN1_OCTET_STRING *data_body=NULL;
419 const EVP_MD *evp_md;
420 const EVP_CIPHER *evp_cipher=NULL;
421 EVP_CIPHER_CTX *evp_ctx=NULL;
422 X509_ALGOR *enc_alg=NULL;
423 STACK_OF(X509_ALGOR) *md_sk=NULL;
424 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
425 PKCS7_RECIP_INFO *ri=NULL;
426
427 i=OBJ_obj2nid(p7->type);
428 p7->state=PKCS7_S_HEADER;
429
430 switch (i)
431 {
432 case NID_pkcs7_signed:
433 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
434 md_sk=p7->d.sign->md_algs;
435 break;
436 case NID_pkcs7_signedAndEnveloped:
437 rsk=p7->d.signed_and_enveloped->recipientinfo;
438 md_sk=p7->d.signed_and_enveloped->md_algs;
439 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
440 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
441 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
442 if (evp_cipher == NULL)
443 {
444 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
445 goto err;
446 }
447 break;
448 case NID_pkcs7_enveloped:
449 rsk=p7->d.enveloped->recipientinfo;
450 enc_alg=p7->d.enveloped->enc_data->algorithm;
451 data_body=p7->d.enveloped->enc_data->enc_data;
452 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
453 if (evp_cipher == NULL)
454 {
455 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
456 goto err;
457 }
458 break;
459 default:
460 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
461 goto err;
462 }
463
464 /* We will be checking the signature */
465 if (md_sk != NULL)
466 {
467 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
468 {
469 xa=sk_X509_ALGOR_value(md_sk,i);
470 if ((btmp=BIO_new(BIO_f_md())) == NULL)
471 {
472 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
473 goto err;
474 }
475
476 j=OBJ_obj2nid(xa->algorithm);
477 evp_md=EVP_get_digestbynid(j);
478 if (evp_md == NULL)
479 {
480 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
481 goto err;
482 }
483
484 BIO_set_md(btmp,evp_md);
485 if (out == NULL)
486 out=btmp;
487 else
488 BIO_push(out,btmp);
489 btmp=NULL;
490 }
491 }
492
493 if (evp_cipher != NULL)
494 {
495 #if 0
496 unsigned char key[EVP_MAX_KEY_LENGTH];
497 unsigned char iv[EVP_MAX_IV_LENGTH];
498 unsigned char *p;
499 int keylen,ivlen;
500 int max;
501 X509_OBJECT ret;
502 #endif
503 unsigned char *ek = NULL;
504 int eklen;
505
506 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
507 {
508 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
509 goto err;
510 }
511
512 /* It was encrypted, we need to decrypt the secret key
513 * with the private key */
514
515 /* Find the recipientInfo which matches the passed certificate
516 * (if any)
517 */
518
519 if (pcert)
520 {
521 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
522 {
523 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
524 if (!pkcs7_cmp_ri(ri, pcert))
525 break;
526 ri=NULL;
527 }
528 if (ri == NULL)
529 {
530 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
531 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
532 goto err;
533 }
534 }
535
536 /* If we haven't got a certificate try each ri in turn */
537
538 if (pcert == NULL)
539 {
540 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
541 {
542 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
543 if (pkcs7_decrypt_rinfo(&ek, &eklen,
544 ri, pkey) > 0)
545 break;
546 ERR_clear_error();
547 ri = NULL;
548 }
549 if (ri == NULL)
550 {
551 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
552 PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
553 goto err;
554 }
555 }
556 else
557 {
558 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) <= 0)
559 goto err;
560 }
561
562 evp_ctx=NULL;
563 BIO_get_cipher_ctx(etmp,&evp_ctx);
564 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
565 goto err;
566 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
567 goto err;
568
569 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
570 /* Some S/MIME clients don't use the same key
571 * and effective key length. The key length is
572 * determined by the size of the decrypted RSA key.
573 */
574 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
575 {
576 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
577 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
578 goto err;
579 }
580 }
581 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
582 goto err;
583
584 if (ek)
585 {
586 OPENSSL_cleanse(ek,eklen);
587 OPENSSL_free(ek);
588 }
589
590 if (out == NULL)
591 out=etmp;
592 else
593 BIO_push(out,etmp);
594 etmp=NULL;
595 }
596
597 #if 1
598 if (PKCS7_is_detached(p7) || (in_bio != NULL))
599 {
600 bio=in_bio;
601 }
602 else
603 {
604 #if 0
605 bio=BIO_new(BIO_s_mem());
606 /* We need to set this so that when we have read all
607 * the data, the encrypt BIO, if present, will read
608 * EOF and encode the last few bytes */
609 BIO_set_mem_eof_return(bio,0);
610
611 if (data_body->length > 0)
612 BIO_write(bio,(char *)data_body->data,data_body->length);
613 #else
614 if (data_body->length > 0)
615 bio = BIO_new_mem_buf(data_body->data,data_body->length);
616 else {
617 bio=BIO_new(BIO_s_mem());
618 BIO_set_mem_eof_return(bio,0);
619 }
620 if (bio == NULL)
621 goto err;
622 #endif
623 }
624 BIO_push(out,bio);
625 bio=NULL;
626 #endif
627 if (0)
628 {
629 err:
630 if (out != NULL) BIO_free_all(out);
631 if (btmp != NULL) BIO_free_all(btmp);
632 if (etmp != NULL) BIO_free_all(etmp);
633 if (bio != NULL) BIO_free_all(bio);
634 out=NULL;
635 }
636 return(out);
637 }
638
PKCS7_find_digest(EVP_MD_CTX ** pmd,BIO * bio,int nid)639 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
640 {
641 for (;;)
642 {
643 bio=BIO_find_type(bio,BIO_TYPE_MD);
644 if (bio == NULL)
645 {
646 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
647 return NULL;
648 }
649 BIO_get_md_ctx(bio,pmd);
650 if (*pmd == NULL)
651 {
652 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
653 return NULL;
654 }
655 if (EVP_MD_CTX_type(*pmd) == nid)
656 return bio;
657 bio=BIO_next(bio);
658 }
659 return NULL;
660 }
661
do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO * si,EVP_MD_CTX * mctx)662 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
663 {
664 unsigned char md_data[EVP_MAX_MD_SIZE];
665 unsigned int md_len;
666
667 /* Add signing time if not already present */
668 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime))
669 {
670 if (!PKCS7_add0_attrib_signing_time(si, NULL))
671 {
672 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
673 ERR_R_MALLOC_FAILURE);
674 return 0;
675 }
676 }
677
678 /* Add digest */
679 EVP_DigestFinal_ex(mctx, md_data,&md_len);
680 if (!PKCS7_add1_attrib_digest(si, md_data, md_len))
681 {
682 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
683 return 0;
684 }
685
686 /* Now sign the attributes */
687 if (!PKCS7_SIGNER_INFO_sign(si))
688 return 0;
689
690 return 1;
691 }
692
693
PKCS7_dataFinal(PKCS7 * p7,BIO * bio)694 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
695 {
696 int ret=0;
697 int i,j;
698 BIO *btmp;
699 PKCS7_SIGNER_INFO *si;
700 EVP_MD_CTX *mdc,ctx_tmp;
701 STACK_OF(X509_ATTRIBUTE) *sk;
702 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
703 ASN1_OCTET_STRING *os=NULL;
704
705 EVP_MD_CTX_init(&ctx_tmp);
706 i=OBJ_obj2nid(p7->type);
707 p7->state=PKCS7_S_HEADER;
708
709 switch (i)
710 {
711 case NID_pkcs7_data:
712 os = p7->d.data;
713 break;
714 case NID_pkcs7_signedAndEnveloped:
715 /* XXXXXXXXXXXXXXXX */
716 si_sk=p7->d.signed_and_enveloped->signer_info;
717 os = p7->d.signed_and_enveloped->enc_data->enc_data;
718 if (!os)
719 {
720 os=M_ASN1_OCTET_STRING_new();
721 if (!os)
722 {
723 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
724 goto err;
725 }
726 p7->d.signed_and_enveloped->enc_data->enc_data=os;
727 }
728 break;
729 case NID_pkcs7_enveloped:
730 /* XXXXXXXXXXXXXXXX */
731 os = p7->d.enveloped->enc_data->enc_data;
732 if (!os)
733 {
734 os=M_ASN1_OCTET_STRING_new();
735 if (!os)
736 {
737 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
738 goto err;
739 }
740 p7->d.enveloped->enc_data->enc_data=os;
741 }
742 break;
743 case NID_pkcs7_signed:
744 si_sk=p7->d.sign->signer_info;
745 os=PKCS7_get_octet_string(p7->d.sign->contents);
746 /* If detached data then the content is excluded */
747 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
748 M_ASN1_OCTET_STRING_free(os);
749 p7->d.sign->contents->d.data = NULL;
750 }
751 break;
752
753 case NID_pkcs7_digest:
754 os=PKCS7_get_octet_string(p7->d.digest->contents);
755 /* If detached data then the content is excluded */
756 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
757 {
758 M_ASN1_OCTET_STRING_free(os);
759 p7->d.digest->contents->d.data = NULL;
760 }
761 break;
762
763 default:
764 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
765 goto err;
766 }
767
768 if (si_sk != NULL)
769 {
770 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
771 {
772 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
773 if (si->pkey == NULL)
774 continue;
775
776 j = OBJ_obj2nid(si->digest_alg->algorithm);
777
778 btmp=bio;
779
780 btmp = PKCS7_find_digest(&mdc, btmp, j);
781
782 if (btmp == NULL)
783 goto err;
784
785 /* We now have the EVP_MD_CTX, lets do the
786 * signing. */
787 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
788
789 sk=si->auth_attr;
790
791 /* If there are attributes, we add the digest
792 * attribute and only sign the attributes */
793 if (sk_X509_ATTRIBUTE_num(sk) > 0)
794 {
795 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
796 goto err;
797 }
798 else
799 {
800 unsigned char *abuf = NULL;
801 unsigned int abuflen;
802 abuflen = EVP_PKEY_size(si->pkey);
803 abuf = OPENSSL_malloc(abuflen);
804 if (!abuf)
805 goto err;
806
807 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
808 si->pkey))
809 {
810 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
811 ERR_R_EVP_LIB);
812 goto err;
813 }
814 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
815 }
816 }
817 }
818 else if (i == NID_pkcs7_digest)
819 {
820 unsigned char md_data[EVP_MAX_MD_SIZE];
821 unsigned int md_len;
822 if (!PKCS7_find_digest(&mdc, bio,
823 OBJ_obj2nid(p7->d.digest->md->algorithm)))
824 goto err;
825 EVP_DigestFinal_ex(mdc,md_data,&md_len);
826 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
827 }
828
829 if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF))
830 {
831 char *cont;
832 long contlen;
833 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
834 if (btmp == NULL)
835 {
836 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
837 goto err;
838 }
839 contlen = BIO_get_mem_data(btmp, &cont);
840 /* Mark the BIO read only then we can use its copy of the data
841 * instead of making an extra copy.
842 */
843 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
844 BIO_set_mem_eof_return(btmp, 0);
845 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
846 }
847 ret=1;
848 err:
849 EVP_MD_CTX_cleanup(&ctx_tmp);
850 return(ret);
851 }
852
PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO * si)853 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
854 {
855 EVP_MD_CTX mctx;
856 EVP_PKEY_CTX *pctx;
857 unsigned char *abuf = NULL;
858 int alen;
859 size_t siglen;
860 const EVP_MD *md = NULL;
861
862 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
863 if (md == NULL)
864 return 0;
865
866 EVP_MD_CTX_init(&mctx);
867 if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0)
868 goto err;
869
870 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
871 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0)
872 {
873 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
874 goto err;
875 }
876
877 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf,
878 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
879 if(!abuf)
880 goto err;
881 if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0)
882 goto err;
883 OPENSSL_free(abuf);
884 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
885 goto err;
886 abuf = OPENSSL_malloc(siglen);
887 if(!abuf)
888 goto err;
889 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
890 goto err;
891
892 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
893 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0)
894 {
895 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
896 goto err;
897 }
898
899 EVP_MD_CTX_cleanup(&mctx);
900
901 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
902
903 return 1;
904
905 err:
906 if (abuf)
907 OPENSSL_free(abuf);
908 EVP_MD_CTX_cleanup(&mctx);
909 return 0;
910
911 }
912
PKCS7_dataVerify(X509_STORE * cert_store,X509_STORE_CTX * ctx,BIO * bio,PKCS7 * p7,PKCS7_SIGNER_INFO * si)913 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
914 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
915 {
916 PKCS7_ISSUER_AND_SERIAL *ias;
917 int ret=0,i;
918 STACK_OF(X509) *cert;
919 X509 *x509;
920
921 if (PKCS7_type_is_signed(p7))
922 {
923 cert=p7->d.sign->cert;
924 }
925 else if (PKCS7_type_is_signedAndEnveloped(p7))
926 {
927 cert=p7->d.signed_and_enveloped->cert;
928 }
929 else
930 {
931 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
932 goto err;
933 }
934 /* XXXXXXXXXXXXXXXXXXXXXXX */
935 ias=si->issuer_and_serial;
936
937 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
938
939 /* were we able to find the cert in passed to us */
940 if (x509 == NULL)
941 {
942 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
943 goto err;
944 }
945
946 /* Lets verify */
947 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
948 {
949 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
950 goto err;
951 }
952 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
953 i=X509_verify_cert(ctx);
954 if (i <= 0)
955 {
956 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
957 X509_STORE_CTX_cleanup(ctx);
958 goto err;
959 }
960 X509_STORE_CTX_cleanup(ctx);
961
962 return PKCS7_signatureVerify(bio, p7, si, x509);
963 err:
964 return ret;
965 }
966
PKCS7_signatureVerify(BIO * bio,PKCS7 * p7,PKCS7_SIGNER_INFO * si,X509 * x509)967 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
968 X509 *x509)
969 {
970 ASN1_OCTET_STRING *os;
971 EVP_MD_CTX mdc_tmp,*mdc;
972 int ret=0,i;
973 int md_type;
974 STACK_OF(X509_ATTRIBUTE) *sk;
975 BIO *btmp;
976 EVP_PKEY *pkey;
977
978 EVP_MD_CTX_init(&mdc_tmp);
979
980 if (!PKCS7_type_is_signed(p7) &&
981 !PKCS7_type_is_signedAndEnveloped(p7)) {
982 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
983 PKCS7_R_WRONG_PKCS7_TYPE);
984 goto err;
985 }
986
987 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
988
989 btmp=bio;
990 for (;;)
991 {
992 if ((btmp == NULL) ||
993 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
994 {
995 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
996 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
997 goto err;
998 }
999 BIO_get_md_ctx(btmp,&mdc);
1000 if (mdc == NULL)
1001 {
1002 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1003 ERR_R_INTERNAL_ERROR);
1004 goto err;
1005 }
1006 if (EVP_MD_CTX_type(mdc) == md_type)
1007 break;
1008 /* Workaround for some broken clients that put the signature
1009 * OID instead of the digest OID in digest_alg->algorithm
1010 */
1011 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1012 break;
1013 btmp=BIO_next(btmp);
1014 }
1015
1016 /* mdc is the digest ctx that we want, unless there are attributes,
1017 * in which case the digest is the signed attributes */
1018 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
1019
1020 sk=si->auth_attr;
1021 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1022 {
1023 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1024 unsigned int md_len;
1025 int alen;
1026 ASN1_OCTET_STRING *message_digest;
1027
1028 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
1029 message_digest=PKCS7_digest_from_attributes(sk);
1030 if (!message_digest)
1031 {
1032 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1033 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1034 goto err;
1035 }
1036 if ((message_digest->length != (int)md_len) ||
1037 (memcmp(message_digest->data,md_dat,md_len)))
1038 {
1039 #if 0
1040 {
1041 int ii;
1042 for (ii=0; ii<message_digest->length; ii++)
1043 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1044 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1045 }
1046 #endif
1047 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1048 PKCS7_R_DIGEST_FAILURE);
1049 ret= -1;
1050 goto err;
1051 }
1052
1053 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
1054
1055 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1056 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1057 if (alen <= 0)
1058 {
1059 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB);
1060 ret = -1;
1061 goto err;
1062 }
1063 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
1064
1065 OPENSSL_free(abuf);
1066 }
1067
1068 os=si->enc_digest;
1069 pkey = X509_get_pubkey(x509);
1070 if (!pkey)
1071 {
1072 ret = -1;
1073 goto err;
1074 }
1075
1076 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1077 EVP_PKEY_free(pkey);
1078 if (i <= 0)
1079 {
1080 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1081 PKCS7_R_SIGNATURE_FAILURE);
1082 ret= -1;
1083 goto err;
1084 }
1085 else
1086 ret=1;
1087 err:
1088 EVP_MD_CTX_cleanup(&mdc_tmp);
1089 return(ret);
1090 }
1091
PKCS7_get_issuer_and_serial(PKCS7 * p7,int idx)1092 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1093 {
1094 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1095 PKCS7_RECIP_INFO *ri;
1096 int i;
1097
1098 i=OBJ_obj2nid(p7->type);
1099 if (i != NID_pkcs7_signedAndEnveloped)
1100 return NULL;
1101 if (p7->d.signed_and_enveloped == NULL)
1102 return NULL;
1103 rsk=p7->d.signed_and_enveloped->recipientinfo;
1104 if (rsk == NULL)
1105 return NULL;
1106 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1107 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1108 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1109 return(ri->issuer_and_serial);
1110 }
1111
PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO * si,int nid)1112 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1113 {
1114 return(get_attribute(si->auth_attr,nid));
1115 }
1116
PKCS7_get_attribute(PKCS7_SIGNER_INFO * si,int nid)1117 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1118 {
1119 return(get_attribute(si->unauth_attr,nid));
1120 }
1121
get_attribute(STACK_OF (X509_ATTRIBUTE)* sk,int nid)1122 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1123 {
1124 int i;
1125 X509_ATTRIBUTE *xa;
1126 ASN1_OBJECT *o;
1127
1128 o=OBJ_nid2obj(nid);
1129 if (!o || !sk) return(NULL);
1130 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1131 {
1132 xa=sk_X509_ATTRIBUTE_value(sk,i);
1133 if (OBJ_cmp(xa->object,o) == 0)
1134 {
1135 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1136 return(sk_ASN1_TYPE_value(xa->value.set,0));
1137 else
1138 return(NULL);
1139 }
1140 }
1141 return(NULL);
1142 }
1143
PKCS7_digest_from_attributes(STACK_OF (X509_ATTRIBUTE)* sk)1144 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1145 {
1146 ASN1_TYPE *astype;
1147 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1148 return astype->value.octet_string;
1149 }
1150
PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO * p7si,STACK_OF (X509_ATTRIBUTE)* sk)1151 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1152 STACK_OF(X509_ATTRIBUTE) *sk)
1153 {
1154 int i;
1155
1156 if (p7si->auth_attr != NULL)
1157 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1158 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1159 if (p7si->auth_attr == NULL)
1160 return 0;
1161 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1162 {
1163 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1164 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1165 == NULL)
1166 return(0);
1167 }
1168 return(1);
1169 }
1170
PKCS7_set_attributes(PKCS7_SIGNER_INFO * p7si,STACK_OF (X509_ATTRIBUTE)* sk)1171 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1172 {
1173 int i;
1174
1175 if (p7si->unauth_attr != NULL)
1176 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1177 X509_ATTRIBUTE_free);
1178 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1179 if (p7si->unauth_attr == NULL)
1180 return 0;
1181 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1182 {
1183 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1184 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1185 == NULL)
1186 return(0);
1187 }
1188 return(1);
1189 }
1190
PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO * p7si,int nid,int atrtype,void * value)1191 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1192 void *value)
1193 {
1194 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1195 }
1196
PKCS7_add_attribute(PKCS7_SIGNER_INFO * p7si,int nid,int atrtype,void * value)1197 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1198 void *value)
1199 {
1200 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1201 }
1202
add_attribute(STACK_OF (X509_ATTRIBUTE)** sk,int nid,int atrtype,void * value)1203 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1204 void *value)
1205 {
1206 X509_ATTRIBUTE *attr=NULL;
1207
1208 if (*sk == NULL)
1209 {
1210 *sk = sk_X509_ATTRIBUTE_new_null();
1211 if (*sk == NULL)
1212 return 0;
1213 new_attrib:
1214 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1215 return 0;
1216 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1217 {
1218 X509_ATTRIBUTE_free(attr);
1219 return 0;
1220 }
1221 }
1222 else
1223 {
1224 int i;
1225
1226 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1227 {
1228 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1229 if (OBJ_obj2nid(attr->object) == nid)
1230 {
1231 X509_ATTRIBUTE_free(attr);
1232 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1233 if (attr == NULL)
1234 return 0;
1235 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1236 {
1237 X509_ATTRIBUTE_free(attr);
1238 return 0;
1239 }
1240 goto end;
1241 }
1242 }
1243 goto new_attrib;
1244 }
1245 end:
1246 return(1);
1247 }
1248
1249