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Improve error handling in pk7_doit
[thirdparty/openssl.git] / crypto / pkcs7 / pk7_doit.c
CommitLineData
62867571
RS		 1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
d02b48c6 3 *
62867571
RS		 4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
d02b48c6
RE		 8 */
9
10#include <stdio.h>
b39fc560 11#include "internal/cryptlib.h"
ec577822
BM		 12#include <openssl/rand.h>
13#include <openssl/objects.h>
14#include <openssl/x509.h>
5a9a4b29 15#include <openssl/x509v3.h>
8f2e4fdf 16#include <openssl/err.h>
d02b48c6 17
b6436ff2 18static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
0f113f3e 19 void *value);
b6436ff2 20static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
dfeab068 21
0f113f3e
MC		 22static int PKCS7_type_is_other(PKCS7 *p7)
23{
24 int isOther = 1;
25
26 int nid = OBJ_obj2nid(p7->type);
27
28 switch (nid) {
29 case NID_pkcs7_data:
30 case NID_pkcs7_signed:
31 case NID_pkcs7_enveloped:
32 case NID_pkcs7_signedAndEnveloped:
33 case NID_pkcs7_digest:
34 case NID_pkcs7_encrypted:
35 isOther = 0;
36 break;
37 default:
38 isOther = 1;
39 }
40
41 return isOther;
42
43}
67fec850 44
caf044cb 45static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
0f113f3e
MC		 46{
47 if (PKCS7_type_is_data(p7))
48 return p7->d.data;
49 if (PKCS7_type_is_other(p7) && p7->d.other
50 && (p7->d.other->type == V_ASN1_OCTET_STRING))
51 return p7->d.other->value.octet_string;
52 return NULL;
53}
67fec850 54
c5a55463 55static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
0f113f3e
MC		 56{
57 BIO *btmp;
58 const EVP_MD *md;
59 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
60 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
61 goto err;
62 }
63
64 md = EVP_get_digestbyobj(alg->algorithm);
65 if (md == NULL) {
66 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
67 goto err;
68 }
69
70 BIO_set_md(btmp, md);
71 if (*pbio == NULL)
72 *pbio = btmp;
73 else if (!BIO_push(*pbio, btmp)) {
74 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
75 goto err;
76 }
77 btmp = NULL;
78
79 return 1;
80
81 err:
ca3a82c3 82 BIO_free(btmp);
0f113f3e 83 return 0;
c5a55463 84
0f113f3e 85}
399a6f0b 86
0f113f3e
MC		 87static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
88 unsigned char *key, int keylen)
89{
90 EVP_PKEY_CTX *pctx = NULL;
91 EVP_PKEY *pkey = NULL;
92 unsigned char *ek = NULL;
93 int ret = 0;
94 size_t eklen;
399a6f0b 95
8382fd3a 96 pkey = X509_get0_pubkey(ri->cert);
399a6f0b 97
0f113f3e
MC		 98 if (!pkey)
99 return 0;
399a6f0b 100
0f113f3e
MC		 101 pctx = EVP_PKEY_CTX_new(pkey, NULL);
102 if (!pctx)
103 return 0;
399a6f0b 104
0f113f3e
MC		 105 if (EVP_PKEY_encrypt_init(pctx) <= 0)
106 goto err;
399a6f0b 107
0f113f3e
MC		 108 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
109 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
110 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
111 goto err;
112 }
399a6f0b 113
0f113f3e
MC		 114 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
115 goto err;
399a6f0b 116
0f113f3e 117 ek = OPENSSL_malloc(eklen);
399a6f0b 118
0f113f3e
MC		 119 if (ek == NULL) {
120 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
121 goto err;
122 }
399a6f0b 123
0f113f3e
MC		 124 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
125 goto err;
399a6f0b 126
0f113f3e
MC		 127 ASN1_STRING_set0(ri->enc_key, ek, eklen);
128 ek = NULL;
399a6f0b 129
0f113f3e 130 ret = 1;
399a6f0b 131
0f113f3e 132 err:
c5ba2d99 133 EVP_PKEY_CTX_free(pctx);
b548a1f1 134 OPENSSL_free(ek);
0f113f3e 135 return ret;
399a6f0b 136
0f113f3e 137}
399a6f0b 138
777c47ac 139static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
0f113f3e
MC		 140 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
141{
142 EVP_PKEY_CTX *pctx = NULL;
143 unsigned char *ek = NULL;
144 size_t eklen;
145
146 int ret = -1;
147
148 pctx = EVP_PKEY_CTX_new(pkey, NULL);
149 if (!pctx)
150 return -1;
151
152 if (EVP_PKEY_decrypt_init(pctx) <= 0)
153 goto err;
154
155 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
156 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
157 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
158 goto err;
159 }
160
161 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
162 ri->enc_key->data, ri->enc_key->length) <= 0)
163 goto err;
164
165 ek = OPENSSL_malloc(eklen);
166
167 if (ek == NULL) {
168 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
169 goto err;
170 }
171
172 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
173 ri->enc_key->data, ri->enc_key->length) <= 0) {
174 ret = 0;
175 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
176 goto err;
177 }
178
179 ret = 1;
180
4b45c6e5 181 OPENSSL_clear_free(*pek, *peklen);
0f113f3e
MC		 182 *pek = ek;
183 *peklen = eklen;
184
185 err:
c5ba2d99 186 EVP_PKEY_CTX_free(pctx);
b548a1f1 187 if (!ret)
0f113f3e
MC		 188 OPENSSL_free(ek);
189
190 return ret;
191}
399a6f0b 192
6b691a5c 193BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
0f113f3e
MC		 194{
195 int i;
196 BIO *out = NULL, *btmp = NULL;
197 X509_ALGOR *xa = NULL;
198 const EVP_CIPHER *evp_cipher = NULL;
199 STACK_OF(X509_ALGOR) *md_sk = NULL;
200 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
201 X509_ALGOR *xalg = NULL;
202 PKCS7_RECIP_INFO *ri = NULL;
203 ASN1_OCTET_STRING *os = NULL;
204
c225c3cf
EK		 205 if (p7 == NULL) {
206 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
207 return NULL;
208 }
209 /*
210 * The content field in the PKCS7 ContentInfo is optional, but that really
211 * only applies to inner content (precisely, detached signatures).
212 *
213 * When reading content, missing outer content is therefore treated as an
214 * error.
215 *
216 * When creating content, PKCS7_content_new() must be called before
217 * calling this method, so a NULL p7->d is always an error.
218 */
219 if (p7->d.ptr == NULL) {
220 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
221 return NULL;
222 }
223
0f113f3e
MC		 224 i = OBJ_obj2nid(p7->type);
225 p7->state = PKCS7_S_HEADER;
226
227 switch (i) {
228 case NID_pkcs7_signed:
229 md_sk = p7->d.sign->md_algs;
230 os = PKCS7_get_octet_string(p7->d.sign->contents);
231 break;
232 case NID_pkcs7_signedAndEnveloped:
233 rsk = p7->d.signed_and_enveloped->recipientinfo;
234 md_sk = p7->d.signed_and_enveloped->md_algs;
235 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
236 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
237 if (evp_cipher == NULL) {
238 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
239 goto err;
240 }
241 break;
242 case NID_pkcs7_enveloped:
243 rsk = p7->d.enveloped->recipientinfo;
244 xalg = p7->d.enveloped->enc_data->algorithm;
245 evp_cipher = p7->d.enveloped->enc_data->cipher;
246 if (evp_cipher == NULL) {
247 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
248 goto err;
249 }
250 break;
251 case NID_pkcs7_digest:
252 xa = p7->d.digest->md;
253 os = PKCS7_get_octet_string(p7->d.digest->contents);
254 break;
255 case NID_pkcs7_data:
256 break;
257 default:
258 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
259 goto err;
260 }
261
262 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
263 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
264 goto err;
265
266 if (xa && !PKCS7_bio_add_digest(&out, xa))
267 goto err;
268
269 if (evp_cipher != NULL) {
270 unsigned char key[EVP_MAX_KEY_LENGTH];
271 unsigned char iv[EVP_MAX_IV_LENGTH];
272 int keylen, ivlen;
273 EVP_CIPHER_CTX *ctx;
274
275 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
276 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
277 goto err;
278 }
279 BIO_get_cipher_ctx(btmp, &ctx);
280 keylen = EVP_CIPHER_key_length(evp_cipher);
281 ivlen = EVP_CIPHER_iv_length(evp_cipher);
282 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
283 if (ivlen > 0)
266483d2 284 if (RAND_bytes(iv, ivlen) <= 0)
0f113f3e
MC		 285 goto err;
286 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
287 goto err;
288 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
289 goto err;
290 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
291 goto err;
292
293 if (ivlen > 0) {
294 if (xalg->parameter == NULL) {
295 xalg->parameter = ASN1_TYPE_new();
296 if (xalg->parameter == NULL)
297 goto err;
298 }
299 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
300 goto err;
301 }
302
303 /* Lets do the pub key stuff :-) */
304 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
305 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
306 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
307 goto err;
308 }
309 OPENSSL_cleanse(key, keylen);
310
311 if (out == NULL)
312 out = btmp;
313 else
314 BIO_push(out, btmp);
315 btmp = NULL;
316 }
317
318 if (bio == NULL) {
4718f449 319 if (PKCS7_is_detached(p7)) {
0f113f3e 320 bio = BIO_new(BIO_s_null());
4718f449 321 } else if (os && os->length > 0) {
0f113f3e 322 bio = BIO_new_mem_buf(os->data, os->length);
4718f449 323 } else {
0f113f3e
MC		 324 bio = BIO_new(BIO_s_mem());
325 if (bio == NULL)
326 goto err;
327 BIO_set_mem_eof_return(bio, 0);
328 }
4718f449
MC		 329 if (bio == NULL)
330 goto err;
0f113f3e
MC		 331 }
332 if (out)
333 BIO_push(out, bio);
334 else
335 out = bio;
ca3a82c3
RS		 336 return out;
337
0f113f3e 338 err:
ca3a82c3
RS		 339 BIO_free_all(out);
340 BIO_free_all(btmp);
341 return NULL;
0f113f3e 342}
dfeab068 343
8f2e4fdf 344static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
0f113f3e
MC		 345{
346 int ret;
347 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
a8d8e06b 348 X509_get_issuer_name(pcert));
0f113f3e
MC		 349 if (ret)
350 return ret;
a8d8e06b
DSH		 351 return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert),
352 ri->issuer_and_serial->serial);
0f113f3e 353}
8f2e4fdf 354
dfeab068 355/* int */
84fa704c 356BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
0f113f3e
MC		 357{
358 int i, j;
359 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
360 X509_ALGOR *xa;
361 ASN1_OCTET_STRING *data_body = NULL;
362 const EVP_MD *evp_md;
363 const EVP_CIPHER *evp_cipher = NULL;
364 EVP_CIPHER_CTX *evp_ctx = NULL;
365 X509_ALGOR *enc_alg = NULL;
366 STACK_OF(X509_ALGOR) *md_sk = NULL;
367 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
368 PKCS7_RECIP_INFO *ri = NULL;
369 unsigned char *ek = NULL, *tkey = NULL;
370 int eklen = 0, tkeylen = 0;
371
c225c3cf
EK		 372 if (p7 == NULL) {
373 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
374 return NULL;
375 }
376
377 if (p7->d.ptr == NULL) {
378 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
379 return NULL;
380 }
381
0f113f3e
MC		 382 i = OBJ_obj2nid(p7->type);
383 p7->state = PKCS7_S_HEADER;
384
385 switch (i) {
386 case NID_pkcs7_signed:
59302b60
EK		 387 /*
388 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
389 * field and optional content.
390 * data_body is NULL if that structure has no (=detached) content
391 * or if the contentType is wrong (i.e., not "data").
392 */
0f113f3e
MC		 393 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
394 if (!PKCS7_is_detached(p7) && data_body == NULL) {
395 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
396 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
397 goto err;
398 }
399 md_sk = p7->d.sign->md_algs;
400 break;
401 case NID_pkcs7_signedAndEnveloped:
402 rsk = p7->d.signed_and_enveloped->recipientinfo;
403 md_sk = p7->d.signed_and_enveloped->md_algs;
59302b60 404 /* data_body is NULL if the optional EncryptedContent is missing. */
0f113f3e
MC		 405 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
406 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
407 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
408 if (evp_cipher == NULL) {
409 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
410 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
411 goto err;
412 }
413 break;
414 case NID_pkcs7_enveloped:
415 rsk = p7->d.enveloped->recipientinfo;
416 enc_alg = p7->d.enveloped->enc_data->algorithm;
59302b60 417 /* data_body is NULL if the optional EncryptedContent is missing. */
0f113f3e
MC		 418 data_body = p7->d.enveloped->enc_data->enc_data;
419 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
420 if (evp_cipher == NULL) {
421 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
422 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
423 goto err;
424 }
425 break;
426 default:
427 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
428 goto err;
429 }
430
59302b60
EK		 431 /* Detached content must be supplied via in_bio instead. */
432 if (data_body == NULL && in_bio == NULL) {
433 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
434 goto err;
435 }
436
0f113f3e
MC		 437 /* We will be checking the signature */
438 if (md_sk != NULL) {
439 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
440 xa = sk_X509_ALGOR_value(md_sk, i);
441 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
442 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
443 goto err;
444 }
445
446 j = OBJ_obj2nid(xa->algorithm);
447 evp_md = EVP_get_digestbynid(j);
448 if (evp_md == NULL) {
449 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
450 PKCS7_R_UNKNOWN_DIGEST_TYPE);
451 goto err;
452 }
453
454 BIO_set_md(btmp, evp_md);
455 if (out == NULL)
456 out = btmp;
457 else
458 BIO_push(out, btmp);
459 btmp = NULL;
460 }
461 }
462
463 if (evp_cipher != NULL) {
0f113f3e
MC		 464 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
465 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
466 goto err;
467 }
468
469 /*
470 * It was encrypted, we need to decrypt the secret key with the
471 * private key
472 */
473
474 /*
475 * Find the recipientInfo which matches the passed certificate (if
476 * any)
477 */
478
479 if (pcert) {
480 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
481 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
482 if (!pkcs7_cmp_ri(ri, pcert))
483 break;
484 ri = NULL;
485 }
486 if (ri == NULL) {
487 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
488 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
489 goto err;
490 }
491 }
492
493 /* If we haven't got a certificate try each ri in turn */
494 if (pcert == NULL) {
495 /*
496 * Always attempt to decrypt all rinfo even after success as a
497 * defence against MMA timing attacks.
498 */
499 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
500 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
501
502 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
503 goto err;
504 ERR_clear_error();
505 }
506 } else {
507 /* Only exit on fatal errors, not decrypt failure */
508 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
509 goto err;
510 ERR_clear_error();
511 }
512
513 evp_ctx = NULL;
514 BIO_get_cipher_ctx(etmp, &evp_ctx);
515 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
516 goto err;
517 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
518 goto err;
519 /* Generate random key as MMA defence */
520 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
521 tkey = OPENSSL_malloc(tkeylen);
90945fa3 522 if (tkey == NULL)
0f113f3e
MC		 523 goto err;
524 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
525 goto err;
526 if (ek == NULL) {
527 ek = tkey;
528 eklen = tkeylen;
529 tkey = NULL;
530 }
531
532 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
533 /*
534 * Some S/MIME clients don't use the same key and effective key
535 * length. The key length is determined by the size of the
536 * decrypted RSA key.
537 */
538 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
539 /* Use random key as MMA defence */
4b45c6e5 540 OPENSSL_clear_free(ek, eklen);
0f113f3e
MC		 541 ek = tkey;
542 eklen = tkeylen;
543 tkey = NULL;
544 }
545 }
546 /* Clear errors so we don't leak information useful in MMA */
547 ERR_clear_error();
548 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
549 goto err;
550
4b45c6e5
RS		 551 OPENSSL_clear_free(ek, eklen);
552 ek = NULL;
553 OPENSSL_clear_free(tkey, tkeylen);
554 tkey = NULL;
0f113f3e
MC		 555
556 if (out == NULL)
557 out = etmp;
558 else
559 BIO_push(out, etmp);
560 etmp = NULL;
561 }
59302b60 562 if (in_bio != NULL) {
0f113f3e
MC		 563 bio = in_bio;
564 } else {
0f113f3e
MC		 565 if (data_body->length > 0)
566 bio = BIO_new_mem_buf(data_body->data, data_body->length);
567 else {
568 bio = BIO_new(BIO_s_mem());
90945fa3
MC		 569 if (bio == NULL)
570 goto err;
0f113f3e
MC		 571 BIO_set_mem_eof_return(bio, 0);
572 }
573 if (bio == NULL)
574 goto err;
0f113f3e
MC		 575 }
576 BIO_push(out, bio);
577 bio = NULL;
4b45c6e5
RS		 578 return out;
579
0f113f3e 580 err:
4b45c6e5
RS		 581 OPENSSL_clear_free(ek, eklen);
582 OPENSSL_clear_free(tkey, tkeylen);
583 BIO_free_all(out);
584 BIO_free_all(btmp);
585 BIO_free_all(etmp);
586 BIO_free_all(bio);
02e112a8 587 return NULL;
0f113f3e 588}
d02b48c6 589
c5a55463 590static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
0f113f3e
MC		 591{
592 for (;;) {
593 bio = BIO_find_type(bio, BIO_TYPE_MD);
594 if (bio == NULL) {
595 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
596 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
597 return NULL;
598 }
599 BIO_get_md_ctx(bio, pmd);
600 if (*pmd == NULL) {
601 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
602 return NULL;
603 }
604 if (EVP_MD_CTX_type(*pmd) == nid)
605 return bio;
606 bio = BIO_next(bio);
607 }
608 return NULL;
609}
c5a55463 610
76fa8f18 611static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
0f113f3e
MC		 612{
613 unsigned char md_data[EVP_MAX_MD_SIZE];
614 unsigned int md_len;
615
616 /* Add signing time if not already present */
617 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
618 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
619 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
620 return 0;
621 }
622 }
623
624 /* Add digest */
625 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
626 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
627 return 0;
628 }
629 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
630 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
631 return 0;
632 }
633
634 /* Now sign the attributes */
635 if (!PKCS7_SIGNER_INFO_sign(si))
636 return 0;
637
638 return 1;
639}
640
6b691a5c 641int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
0f113f3e
MC		 642{
643 int ret = 0;
644 int i, j;
645 BIO *btmp;
646 PKCS7_SIGNER_INFO *si;
6e59a892 647 EVP_MD_CTX *mdc, *ctx_tmp;
0f113f3e
MC		 648 STACK_OF(X509_ATTRIBUTE) *sk;
649 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
650 ASN1_OCTET_STRING *os = NULL;
651
c225c3cf
EK		 652 if (p7 == NULL) {
653 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
654 return 0;
655 }
656
657 if (p7->d.ptr == NULL) {
658 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
659 return 0;
660 }
661
bfb0641f 662 ctx_tmp = EVP_MD_CTX_new();
6e59a892
RL		 663 if (ctx_tmp == NULL) {
664 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
665 return 0;
666 }
667
0f113f3e
MC		 668 i = OBJ_obj2nid(p7->type);
669 p7->state = PKCS7_S_HEADER;
670
671 switch (i) {
672 case NID_pkcs7_data:
673 os = p7->d.data;
674 break;
675 case NID_pkcs7_signedAndEnveloped:
676 /* XXXXXXXXXXXXXXXX */
677 si_sk = p7->d.signed_and_enveloped->signer_info;
678 os = p7->d.signed_and_enveloped->enc_data->enc_data;
90945fa3 679 if (os == NULL) {
f422a514 680 os = ASN1_OCTET_STRING_new();
90945fa3 681 if (os == NULL) {
0f113f3e
MC		 682 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
683 goto err;
684 }
685 p7->d.signed_and_enveloped->enc_data->enc_data = os;
686 }
687 break;
688 case NID_pkcs7_enveloped:
689 /* XXXXXXXXXXXXXXXX */
690 os = p7->d.enveloped->enc_data->enc_data;
90945fa3 691 if (os == NULL) {
f422a514 692 os = ASN1_OCTET_STRING_new();
90945fa3 693 if (os == NULL) {
0f113f3e
MC		 694 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
695 goto err;
696 }
697 p7->d.enveloped->enc_data->enc_data = os;
698 }
699 break;
700 case NID_pkcs7_signed:
701 si_sk = p7->d.sign->signer_info;
702 os = PKCS7_get_octet_string(p7->d.sign->contents);
703 /* If detached data then the content is excluded */
704 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
f422a514 705 ASN1_OCTET_STRING_free(os);
c225c3cf 706 os = NULL;
0f113f3e
MC		 707 p7->d.sign->contents->d.data = NULL;
708 }
709 break;
710
711 case NID_pkcs7_digest:
712 os = PKCS7_get_octet_string(p7->d.digest->contents);
713 /* If detached data then the content is excluded */
714 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
f422a514 715 ASN1_OCTET_STRING_free(os);
c225c3cf 716 os = NULL;
0f113f3e
MC		 717 p7->d.digest->contents->d.data = NULL;
718 }
719 break;
720
721 default:
722 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
723 goto err;
724 }
725
726 if (si_sk != NULL) {
727 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
728 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
729 if (si->pkey == NULL)
730 continue;
731
732 j = OBJ_obj2nid(si->digest_alg->algorithm);
733
734 btmp = bio;
735
736 btmp = PKCS7_find_digest(&mdc, btmp, j);
737
738 if (btmp == NULL)
739 goto err;
740
741 /*
742 * We now have the EVP_MD_CTX, lets do the signing.
743 */
6e59a892 744 if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc))
0f113f3e
MC		 745 goto err;
746
747 sk = si->auth_attr;
748
749 /*
750 * If there are attributes, we add the digest attribute and only
751 * sign the attributes
752 */
753 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
6e59a892 754 if (!do_pkcs7_signed_attrib(si, ctx_tmp))
0f113f3e
MC		 755 goto err;
756 } else {
757 unsigned char *abuf = NULL;
758 unsigned int abuflen;
759 abuflen = EVP_PKEY_size(si->pkey);
760 abuf = OPENSSL_malloc(abuflen);
90945fa3 761 if (abuf == NULL)
0f113f3e
MC		 762 goto err;
763
6e59a892 764 if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) {
d54ac5c4 765 OPENSSL_free(abuf);
0f113f3e
MC		 766 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
767 goto err;
768 }
769 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
770 }
771 }
772 } else if (i == NID_pkcs7_digest) {
773 unsigned char md_data[EVP_MAX_MD_SIZE];
774 unsigned int md_len;
775 if (!PKCS7_find_digest(&mdc, bio,
776 OBJ_obj2nid(p7->d.digest->md->algorithm)))
777 goto err;
778 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
779 goto err;
d356dc56
MC		 780 if (!ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len))
781 goto err;
0f113f3e
MC		 782 }
783
c225c3cf 784 if (!PKCS7_is_detached(p7)) {
0f113f3e 785 /*
c225c3cf
EK		 786 * NOTE(emilia): I think we only reach os == NULL here because detached
787 * digested data support is broken.
0f113f3e 788 */
c225c3cf
EK		 789 if (os == NULL)
790 goto err;
791 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
792 char *cont;
793 long contlen;
794 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
795 if (btmp == NULL) {
796 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
797 goto err;
798 }
799 contlen = BIO_get_mem_data(btmp, &cont);
800 /*
801 * Mark the BIO read only then we can use its copy of the data
802 * instead of making an extra copy.
803 */
804 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
805 BIO_set_mem_eof_return(btmp, 0);
806 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
807 }
0f113f3e
MC		 808 }
809 ret = 1;
810 err:
bfb0641f 811 EVP_MD_CTX_free(ctx_tmp);
26a7d938 812 return ret;
0f113f3e 813}
d02b48c6 814
76fa8f18 815int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
0f113f3e 816{
6e59a892 817 EVP_MD_CTX *mctx;
e6803117 818 EVP_PKEY_CTX *pctx = NULL;
0f113f3e
MC		 819 unsigned char *abuf = NULL;
820 int alen;
821 size_t siglen;
822 const EVP_MD *md = NULL;
823
824 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
825 if (md == NULL)
826 return 0;
827
bfb0641f 828 mctx = EVP_MD_CTX_new();
6e59a892
RL		 829 if (mctx == NULL) {
830 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE);
831 goto err;
832 }
833
834 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
0f113f3e
MC		 835 goto err;
836
837 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
838 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
839 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
840 goto err;
841 }
842
843 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
844 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
845 if (!abuf)
846 goto err;
6e59a892 847 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
0f113f3e
MC		 848 goto err;
849 OPENSSL_free(abuf);
850 abuf = NULL;
6e59a892 851 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
0f113f3e
MC		 852 goto err;
853 abuf = OPENSSL_malloc(siglen);
90945fa3 854 if (abuf == NULL)
0f113f3e 855 goto err;
6e59a892 856 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
0f113f3e
MC		 857 goto err;
858
859 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
860 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
861 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
862 goto err;
863 }
864
bfb0641f 865 EVP_MD_CTX_free(mctx);
0f113f3e
MC		 866
867 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
868
869 return 1;
870
871 err:
b548a1f1 872 OPENSSL_free(abuf);
bfb0641f 873 EVP_MD_CTX_free(mctx);
0f113f3e
MC		 874 return 0;
875
876}
76fa8f18 877
6b691a5c 878int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
0f113f3e
MC		 879 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
880{
881 PKCS7_ISSUER_AND_SERIAL *ias;
882 int ret = 0, i;
883 STACK_OF(X509) *cert;
884 X509 *x509;
885
c225c3cf
EK		 886 if (p7 == NULL) {
887 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
888 return 0;
889 }
890
891 if (p7->d.ptr == NULL) {
892 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
893 return 0;
894 }
895
0f113f3e
MC		 896 if (PKCS7_type_is_signed(p7)) {
897 cert = p7->d.sign->cert;
898 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
899 cert = p7->d.signed_and_enveloped->cert;
900 } else {
901 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
902 goto err;
903 }
904 /* XXXXXXXXXXXXXXXXXXXXXXX */
905 ias = si->issuer_and_serial;
906
907 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
908
909 /* were we able to find the cert in passed to us */
910 if (x509 == NULL) {
911 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
912 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
913 goto err;
914 }
915
916 /* Lets verify */
917 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
918 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
919 goto err;
920 }
921 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
922 i = X509_verify_cert(ctx);
923 if (i <= 0) {
924 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
925 X509_STORE_CTX_cleanup(ctx);
926 goto err;
927 }
928 X509_STORE_CTX_cleanup(ctx);
929
930 return PKCS7_signatureVerify(bio, p7, si, x509);
931 err:
932 return ret;
933}
170afce5
DSH		 934
935int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
0f113f3e 936 X509 *x509)
dfeab068 937{
0f113f3e 938 ASN1_OCTET_STRING *os;
6e59a892 939 EVP_MD_CTX *mdc_tmp, *mdc;
0f113f3e
MC		 940 int ret = 0, i;
941 int md_type;
942 STACK_OF(X509_ATTRIBUTE) *sk;
943 BIO *btmp;
944 EVP_PKEY *pkey;
945
bfb0641f 946 mdc_tmp = EVP_MD_CTX_new();
6e59a892
RL		 947 if (mdc_tmp == NULL) {
948 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE);
949 goto err;
950 }
0f113f3e
MC		 951
952 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
953 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
954 goto err;
955 }
956
957 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
958
959 btmp = bio;
960 for (;;) {
961 if ((btmp == NULL) ||
962 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
963 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
964 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
965 goto err;
966 }
967 BIO_get_md_ctx(btmp, &mdc);
968 if (mdc == NULL) {
969 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
970 goto err;
971 }
972 if (EVP_MD_CTX_type(mdc) == md_type)
973 break;
974 /*
975 * Workaround for some broken clients that put the signature OID
976 * instead of the digest OID in digest_alg->algorithm
977 */
978 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
979 break;
980 btmp = BIO_next(btmp);
981 }
982
983 /*
984 * mdc is the digest ctx that we want, unless there are attributes, in
985 * which case the digest is the signed attributes
986 */
6e59a892 987 if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc))
0f113f3e
MC		 988 goto err;
989
990 sk = si->auth_attr;
991 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
992 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
993 unsigned int md_len;
994 int alen;
995 ASN1_OCTET_STRING *message_digest;
996
6e59a892 997 if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len))
0f113f3e
MC		 998 goto err;
999 message_digest = PKCS7_digest_from_attributes(sk);
1000 if (!message_digest) {
1001 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1002 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1003 goto err;
1004 }
1005 if ((message_digest->length != (int)md_len) ||
1006 (memcmp(message_digest->data, md_dat, md_len))) {
0f113f3e
MC		 1007 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1008 ret = -1;
1009 goto err;
1010 }
1011
6e59a892 1012 if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL))
0f113f3e
MC		 1013 goto err;
1014
1015 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1016 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1017 if (alen <= 0) {
1018 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1019 ret = -1;
1020 goto err;
1021 }
6e59a892 1022 if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen))
0f113f3e
MC		 1023 goto err;
1024
1025 OPENSSL_free(abuf);
1026 }
1027
1028 os = si->enc_digest;
8382fd3a 1029 pkey = X509_get0_pubkey(x509);
0f113f3e
MC		 1030 if (!pkey) {
1031 ret = -1;
1032 goto err;
1033 }
1034
6e59a892 1035 i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey);
0f113f3e
MC		 1036 if (i <= 0) {
1037 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1038 ret = -1;
1039 goto err;
c5ba2d99
RS		 1040 }
1041 ret = 1;
0f113f3e 1042 err:
bfb0641f 1043 EVP_MD_CTX_free(mdc_tmp);
26a7d938 1044 return ret;
0f113f3e 1045}
d02b48c6 1046
6b691a5c 1047PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
0f113f3e
MC		 1048{
1049 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1050 PKCS7_RECIP_INFO *ri;
1051 int i;
1052
1053 i = OBJ_obj2nid(p7->type);
1054 if (i != NID_pkcs7_signedAndEnveloped)
1055 return NULL;
1056 if (p7->d.signed_and_enveloped == NULL)
1057 return NULL;
1058 rsk = p7->d.signed_and_enveloped->recipientinfo;
1059 if (rsk == NULL)
1060 return NULL;
0f113f3e 1061 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
26a7d938 1062 return NULL;
0f113f3e 1063 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
26a7d938 1064 return ri->issuer_and_serial;
0f113f3e 1065}
dfeab068 1066
6b691a5c 1067ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
0f113f3e 1068{
26a7d938 1069 return get_attribute(si->auth_attr, nid);
0f113f3e 1070}
dfeab068 1071
6b691a5c 1072ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
0f113f3e 1073{
26a7d938 1074 return get_attribute(si->unauth_attr, nid);
0f113f3e 1075}
dfeab068 1076
b6436ff2 1077static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
0f113f3e 1078{
9b0a4531 1079 int idx;
0f113f3e 1080 X509_ATTRIBUTE *xa;
9b0a4531
DSH		 1081 idx = X509at_get_attr_by_NID(sk, nid, -1);
1082 xa = X509at_get_attr(sk, idx);
1083 return X509_ATTRIBUTE_get0_type(xa, 0);
0f113f3e 1084}
dfeab068 1085
b6436ff2 1086ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
10243d97 1087{
0f113f3e 1088 ASN1_TYPE *astype;
75ebbd9a 1089 if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL)
0f113f3e
MC		 1090 return NULL;
1091 return astype->value.octet_string;
10243d97 1092}
dfeab068 1093
b6436ff2 1094int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
0f113f3e
MC		 1095 STACK_OF(X509_ATTRIBUTE) *sk)
1096{
1097 int i;
1098
222561fe 1099 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
0f113f3e
MC		 1100 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1101 if (p7si->auth_attr == NULL)
1102 return 0;
1103 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1104 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1105 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1106 (sk, i))))
1107 == NULL)
26a7d938 1108 return 0;
0f113f3e 1109 }
208fb891 1110 return 1;
0f113f3e
MC		 1111}
1112
1113int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1114 STACK_OF(X509_ATTRIBUTE) *sk)
1115{
1116 int i;
1117
222561fe 1118 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
0f113f3e
MC		 1119 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1120 if (p7si->unauth_attr == NULL)
1121 return 0;
1122 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1123 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1124 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1125 (sk, i))))
1126 == NULL)
26a7d938 1127 return 0;
0f113f3e 1128 }
208fb891 1129 return 1;
0f113f3e 1130}
dfeab068 1131
6b691a5c 1132int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
0f113f3e
MC		 1133 void *value)
1134{
26a7d938 1135 return add_attribute(&(p7si->auth_attr), nid, atrtype, value);
0f113f3e 1136}
dfeab068 1137
6b691a5c 1138int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
0f113f3e
MC		 1139 void *value)
1140{
26a7d938 1141 return add_attribute(&(p7si->unauth_attr), nid, atrtype, value);
0f113f3e 1142}
dfeab068 1143
b6436ff2 1144static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
0f113f3e
MC		 1145 void *value)
1146{
1147 X509_ATTRIBUTE *attr = NULL;
1148
1149 if (*sk == NULL) {
75ebbd9a 1150 if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
0f113f3e
MC		 1151 return 0;
1152 new_attrib:
75ebbd9a 1153 if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL)
0f113f3e
MC		 1154 return 0;
1155 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1156 X509_ATTRIBUTE_free(attr);
1157 return 0;
1158 }
1159 } else {
1160 int i;
1161
1162 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1163 attr = sk_X509_ATTRIBUTE_value(*sk, i);
9b0a4531 1164 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
0f113f3e
MC		 1165 X509_ATTRIBUTE_free(attr);
1166 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1167 if (attr == NULL)
1168 return 0;
1169 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1170 X509_ATTRIBUTE_free(attr);
1171 return 0;
1172 }
1173 goto end;
1174 }
1175 }
1176 goto new_attrib;
1177 }
1178 end:
208fb891 1179 return 1;
0f113f3e 1180}
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