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OpenSSL 1.0.2f
[tomato.git] / release / src / router / openssl / crypto / pkcs7 / pk7_doit.c
blob946aaa65435b33c9710cbf4292c194cf0f5469e6
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
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 case NID_pkcs7_data:
79 case NID_pkcs7_signed:
80 case NID_pkcs7_enveloped:
81 case NID_pkcs7_signedAndEnveloped:
82 case NID_pkcs7_digest:
83 case NID_pkcs7_encrypted:
84 isOther = 0;
85 break;
86 default:
87 isOther = 1;
88 }
89
90 return isOther;
91
92 }
93
94 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
95 {
96 if (PKCS7_type_is_data(p7))
97 return p7->d.data;
98 if (PKCS7_type_is_other(p7) && p7->d.other
99 && (p7->d.other->type == V_ASN1_OCTET_STRING))
100 return p7->d.other->value.octet_string;
101 return NULL;
102 }
103
104 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
105 {
106 BIO *btmp;
107 const EVP_MD *md;
108 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
109 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
110 goto err;
111 }
112
113 md = EVP_get_digestbyobj(alg->algorithm);
114 if (md == NULL) {
115 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
116 goto err;
117 }
118
119 BIO_set_md(btmp, md);
120 if (*pbio == NULL)
121 *pbio = btmp;
122 else if (!BIO_push(*pbio, btmp)) {
123 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
124 goto err;
125 }
126 btmp = NULL;
127
128 return 1;
129
130 err:
131 if (btmp)
132 BIO_free(btmp);
133 return 0;
134
135 }
136
137 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
138 unsigned char *key, int keylen)
139 {
140 EVP_PKEY_CTX *pctx = NULL;
141 EVP_PKEY *pkey = NULL;
142 unsigned char *ek = NULL;
143 int ret = 0;
144 size_t eklen;
145
146 pkey = X509_get_pubkey(ri->cert);
147
148 if (!pkey)
149 return 0;
150
151 pctx = EVP_PKEY_CTX_new(pkey, NULL);
152 if (!pctx)
153 return 0;
154
155 if (EVP_PKEY_encrypt_init(pctx) <= 0)
156 goto err;
157
158 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
159 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
160 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
161 goto err;
162 }
163
164 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
165 goto err;
166
167 ek = OPENSSL_malloc(eklen);
168
169 if (ek == NULL) {
170 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
171 goto err;
172 }
173
174 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
175 goto err;
176
177 ASN1_STRING_set0(ri->enc_key, ek, eklen);
178 ek = NULL;
179
180 ret = 1;
181
182 err:
183 if (pkey)
184 EVP_PKEY_free(pkey);
185 if (pctx)
186 EVP_PKEY_CTX_free(pctx);
187 if (ek)
188 OPENSSL_free(ek);
189 return ret;
190
191 }
192
193 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
194 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
195 {
196 EVP_PKEY_CTX *pctx = NULL;
197 unsigned char *ek = NULL;
198 size_t eklen;
199
200 int ret = -1;
201
202 pctx = EVP_PKEY_CTX_new(pkey, NULL);
203 if (!pctx)
204 return -1;
205
206 if (EVP_PKEY_decrypt_init(pctx) <= 0)
207 goto err;
208
209 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
210 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
211 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
212 goto err;
213 }
214
215 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
216 ri->enc_key->data, ri->enc_key->length) <= 0)
217 goto err;
218
219 ek = OPENSSL_malloc(eklen);
220
221 if (ek == NULL) {
222 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
223 goto err;
224 }
225
226 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
227 ri->enc_key->data, ri->enc_key->length) <= 0) {
228 ret = 0;
229 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
230 goto err;
231 }
232
233 ret = 1;
234
235 if (*pek) {
236 OPENSSL_cleanse(*pek, *peklen);
237 OPENSSL_free(*pek);
238 }
239
240 *pek = ek;
241 *peklen = eklen;
242
243 err:
244 if (pctx)
245 EVP_PKEY_CTX_free(pctx);
246 if (!ret && ek)
247 OPENSSL_free(ek);
248
249 return ret;
250 }
251
252 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
253 {
254 int i;
255 BIO *out = NULL, *btmp = NULL;
256 X509_ALGOR *xa = NULL;
257 const EVP_CIPHER *evp_cipher = NULL;
258 STACK_OF(X509_ALGOR) *md_sk = NULL;
259 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
260 X509_ALGOR *xalg = NULL;
261 PKCS7_RECIP_INFO *ri = NULL;
262 ASN1_OCTET_STRING *os = NULL;
263
264 if (p7 == NULL) {
265 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
266 return NULL;
267 }
268 /*
269 * The content field in the PKCS7 ContentInfo is optional, but that really
270 * only applies to inner content (precisely, detached signatures).
271 *
272 * When reading content, missing outer content is therefore treated as an
273 * error.
274 *
275 * When creating content, PKCS7_content_new() must be called before
276 * calling this method, so a NULL p7->d is always an error.
277 */
278 if (p7->d.ptr == NULL) {
279 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
280 return NULL;
281 }
282
283 i = OBJ_obj2nid(p7->type);
284 p7->state = PKCS7_S_HEADER;
285
286 switch (i) {
287 case NID_pkcs7_signed:
288 md_sk = p7->d.sign->md_algs;
289 os = PKCS7_get_octet_string(p7->d.sign->contents);
290 break;
291 case NID_pkcs7_signedAndEnveloped:
292 rsk = p7->d.signed_and_enveloped->recipientinfo;
293 md_sk = p7->d.signed_and_enveloped->md_algs;
294 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
295 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
296 if (evp_cipher == NULL) {
297 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
298 goto err;
299 }
300 break;
301 case NID_pkcs7_enveloped:
302 rsk = p7->d.enveloped->recipientinfo;
303 xalg = p7->d.enveloped->enc_data->algorithm;
304 evp_cipher = p7->d.enveloped->enc_data->cipher;
305 if (evp_cipher == NULL) {
306 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
307 goto err;
308 }
309 break;
310 case NID_pkcs7_digest:
311 xa = p7->d.digest->md;
312 os = PKCS7_get_octet_string(p7->d.digest->contents);
313 break;
314 case NID_pkcs7_data:
315 break;
316 default:
317 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
318 goto err;
319 }
320
321 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
322 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
323 goto err;
324
325 if (xa && !PKCS7_bio_add_digest(&out, xa))
326 goto err;
327
328 if (evp_cipher != NULL) {
329 unsigned char key[EVP_MAX_KEY_LENGTH];
330 unsigned char iv[EVP_MAX_IV_LENGTH];
331 int keylen, ivlen;
332 EVP_CIPHER_CTX *ctx;
333
334 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
335 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
336 goto err;
337 }
338 BIO_get_cipher_ctx(btmp, &ctx);
339 keylen = EVP_CIPHER_key_length(evp_cipher);
340 ivlen = EVP_CIPHER_iv_length(evp_cipher);
341 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
342 if (ivlen > 0)
343 if (RAND_pseudo_bytes(iv, ivlen) <= 0)
344 goto err;
345 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
346 goto err;
347 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
348 goto err;
349 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
350 goto err;
351
352 if (ivlen > 0) {
353 if (xalg->parameter == NULL) {
354 xalg->parameter = ASN1_TYPE_new();
355 if (xalg->parameter == NULL)
356 goto err;
357 }
358 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
359 goto err;
360 }
361
362 /* Lets do the pub key stuff :-) */
363 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
364 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
365 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
366 goto err;
367 }
368 OPENSSL_cleanse(key, keylen);
369
370 if (out == NULL)
371 out = btmp;
372 else
373 BIO_push(out, btmp);
374 btmp = NULL;
375 }
376
377 if (bio == NULL) {
378 if (PKCS7_is_detached(p7))
379 bio = BIO_new(BIO_s_null());
380 else if (os && os->length > 0)
381 bio = BIO_new_mem_buf(os->data, os->length);
382 if (bio == NULL) {
383 bio = BIO_new(BIO_s_mem());
384 if (bio == NULL)
385 goto err;
386 BIO_set_mem_eof_return(bio, 0);
387 }
388 }
389 if (out)
390 BIO_push(out, bio);
391 else
392 out = bio;
393 bio = NULL;
394 if (0) {
395 err:
396 if (out != NULL)
397 BIO_free_all(out);
398 if (btmp != NULL)
399 BIO_free_all(btmp);
400 out = NULL;
401 }
402 return (out);
403 }
404
405 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
406 {
407 int ret;
408 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
409 pcert->cert_info->issuer);
410 if (ret)
411 return ret;
412 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
413 ri->issuer_and_serial->serial);
414 }
415
416 /* int */
417 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
418 {
419 int i, j;
420 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
421 X509_ALGOR *xa;
422 ASN1_OCTET_STRING *data_body = NULL;
423 const EVP_MD *evp_md;
424 const EVP_CIPHER *evp_cipher = NULL;
425 EVP_CIPHER_CTX *evp_ctx = NULL;
426 X509_ALGOR *enc_alg = NULL;
427 STACK_OF(X509_ALGOR) *md_sk = NULL;
428 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
429 PKCS7_RECIP_INFO *ri = NULL;
430 unsigned char *ek = NULL, *tkey = NULL;
431 int eklen = 0, tkeylen = 0;
432
433 if (p7 == NULL) {
434 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
435 return NULL;
436 }
437
438 if (p7->d.ptr == NULL) {
439 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
440 return NULL;
441 }
442
443 i = OBJ_obj2nid(p7->type);
444 p7->state = PKCS7_S_HEADER;
445
446 switch (i) {
447 case NID_pkcs7_signed:
448 /*
449 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
450 * field and optional content.
451 * data_body is NULL if that structure has no (=detached) content
452 * or if the contentType is wrong (i.e., not "data").
453 */
454 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
455 if (!PKCS7_is_detached(p7) && data_body == NULL) {
456 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
457 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
458 goto err;
459 }
460 md_sk = p7->d.sign->md_algs;
461 break;
462 case NID_pkcs7_signedAndEnveloped:
463 rsk = p7->d.signed_and_enveloped->recipientinfo;
464 md_sk = p7->d.signed_and_enveloped->md_algs;
465 /* data_body is NULL if the optional EncryptedContent is missing. */
466 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
467 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
468 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
469 if (evp_cipher == NULL) {
470 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
471 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
472 goto err;
473 }
474 break;
475 case NID_pkcs7_enveloped:
476 rsk = p7->d.enveloped->recipientinfo;
477 enc_alg = p7->d.enveloped->enc_data->algorithm;
478 /* data_body is NULL if the optional EncryptedContent is missing. */
479 data_body = p7->d.enveloped->enc_data->enc_data;
480 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
481 if (evp_cipher == NULL) {
482 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
483 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
484 goto err;
485 }
486 break;
487 default:
488 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
489 goto err;
490 }
491
492 /* Detached content must be supplied via in_bio instead. */
493 if (data_body == NULL && in_bio == NULL) {
494 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
495 goto err;
496 }
497
498 /* We will be checking the signature */
499 if (md_sk != NULL) {
500 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
501 xa = sk_X509_ALGOR_value(md_sk, i);
502 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
503 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
504 goto err;
505 }
506
507 j = OBJ_obj2nid(xa->algorithm);
508 evp_md = EVP_get_digestbynid(j);
509 if (evp_md == NULL) {
510 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
511 PKCS7_R_UNKNOWN_DIGEST_TYPE);
512 goto err;
513 }
514
515 BIO_set_md(btmp, evp_md);
516 if (out == NULL)
517 out = btmp;
518 else
519 BIO_push(out, btmp);
520 btmp = NULL;
521 }
522 }
523
524 if (evp_cipher != NULL) {
525 #if 0
526 unsigned char key[EVP_MAX_KEY_LENGTH];
527 unsigned char iv[EVP_MAX_IV_LENGTH];
528 unsigned char *p;
529 int keylen, ivlen;
530 int max;
531 X509_OBJECT ret;
532 #endif
533
534 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
535 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
536 goto err;
537 }
538
539 /*
540 * It was encrypted, we need to decrypt the secret key with the
541 * private key
542 */
543
544 /*
545 * Find the recipientInfo which matches the passed certificate (if
546 * any)
547 */
548
549 if (pcert) {
550 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
551 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
552 if (!pkcs7_cmp_ri(ri, pcert))
553 break;
554 ri = NULL;
555 }
556 if (ri == NULL) {
557 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
558 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
559 goto err;
560 }
561 }
562
563 /* If we haven't got a certificate try each ri in turn */
564 if (pcert == NULL) {
565 /*
566 * Always attempt to decrypt all rinfo even after sucess as a
567 * defence against MMA timing attacks.
568 */
569 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
570 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
571
572 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
573 goto err;
574 ERR_clear_error();
575 }
576 } else {
577 /* Only exit on fatal errors, not decrypt failure */
578 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
579 goto err;
580 ERR_clear_error();
581 }
582
583 evp_ctx = NULL;
584 BIO_get_cipher_ctx(etmp, &evp_ctx);
585 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
586 goto err;
587 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
588 goto err;
589 /* Generate random key as MMA defence */
590 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
591 tkey = OPENSSL_malloc(tkeylen);
592 if (!tkey)
593 goto err;
594 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
595 goto err;
596 if (ek == NULL) {
597 ek = tkey;
598 eklen = tkeylen;
599 tkey = NULL;
600 }
601
602 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
603 /*
604 * Some S/MIME clients don't use the same key and effective key
605 * length. The key length is determined by the size of the
606 * decrypted RSA key.
607 */
608 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
609 /* Use random key as MMA defence */
610 OPENSSL_cleanse(ek, eklen);
611 OPENSSL_free(ek);
612 ek = tkey;
613 eklen = tkeylen;
614 tkey = NULL;
615 }
616 }
617 /* Clear errors so we don't leak information useful in MMA */
618 ERR_clear_error();
619 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
620 goto err;
621
622 if (ek) {
623 OPENSSL_cleanse(ek, eklen);
624 OPENSSL_free(ek);
625 ek = NULL;
626 }
627 if (tkey) {
628 OPENSSL_cleanse(tkey, tkeylen);
629 OPENSSL_free(tkey);
630 tkey = NULL;
631 }
632
633 if (out == NULL)
634 out = etmp;
635 else
636 BIO_push(out, etmp);
637 etmp = NULL;
638 }
639 #if 1
640 if (in_bio != NULL) {
641 bio = in_bio;
642 } else {
643 # if 0
644 bio = BIO_new(BIO_s_mem());
645 /*
646 * We need to set this so that when we have read all the data, the
647 * encrypt BIO, if present, will read EOF and encode the last few
648 * bytes
649 */
650 BIO_set_mem_eof_return(bio, 0);
651
652 if (data_body->length > 0)
653 BIO_write(bio, (char *)data_body->data, data_body->length);
654 # else
655 if (data_body->length > 0)
656 bio = BIO_new_mem_buf(data_body->data, data_body->length);
657 else {
658 bio = BIO_new(BIO_s_mem());
659 if (bio == NULL)
660 goto err;
661 BIO_set_mem_eof_return(bio, 0);
662 }
663 if (bio == NULL)
664 goto err;
665 # endif
666 }
667 BIO_push(out, bio);
668 bio = NULL;
669 #endif
670 if (0) {
671 err:
672 if (ek) {
673 OPENSSL_cleanse(ek, eklen);
674 OPENSSL_free(ek);
675 }
676 if (tkey) {
677 OPENSSL_cleanse(tkey, tkeylen);
678 OPENSSL_free(tkey);
679 }
680 if (out != NULL)
681 BIO_free_all(out);
682 if (btmp != NULL)
683 BIO_free_all(btmp);
684 if (etmp != NULL)
685 BIO_free_all(etmp);
686 if (bio != NULL)
687 BIO_free_all(bio);
688 out = NULL;
689 }
690 return (out);
691 }
692
693 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
694 {
695 for (;;) {
696 bio = BIO_find_type(bio, BIO_TYPE_MD);
697 if (bio == NULL) {
698 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
699 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
700 return NULL;
701 }
702 BIO_get_md_ctx(bio, pmd);
703 if (*pmd == NULL) {
704 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
705 return NULL;
706 }
707 if (EVP_MD_CTX_type(*pmd) == nid)
708 return bio;
709 bio = BIO_next(bio);
710 }
711 return NULL;
712 }
713
714 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
715 {
716 unsigned char md_data[EVP_MAX_MD_SIZE];
717 unsigned int md_len;
718
719 /* Add signing time if not already present */
720 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
721 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
722 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
723 return 0;
724 }
725 }
726
727 /* Add digest */
728 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
729 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
730 return 0;
731 }
732 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
733 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
734 return 0;
735 }
736
737 /* Now sign the attributes */
738 if (!PKCS7_SIGNER_INFO_sign(si))
739 return 0;
740
741 return 1;
742 }
743
744 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
745 {
746 int ret = 0;
747 int i, j;
748 BIO *btmp;
749 PKCS7_SIGNER_INFO *si;
750 EVP_MD_CTX *mdc, ctx_tmp;
751 STACK_OF(X509_ATTRIBUTE) *sk;
752 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
753 ASN1_OCTET_STRING *os = NULL;
754
755 if (p7 == NULL) {
756 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
757 return 0;
758 }
759
760 if (p7->d.ptr == NULL) {
761 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
762 return 0;
763 }
764
765 EVP_MD_CTX_init(&ctx_tmp);
766 i = OBJ_obj2nid(p7->type);
767 p7->state = PKCS7_S_HEADER;
768
769 switch (i) {
770 case NID_pkcs7_data:
771 os = p7->d.data;
772 break;
773 case NID_pkcs7_signedAndEnveloped:
774 /* XXXXXXXXXXXXXXXX */
775 si_sk = p7->d.signed_and_enveloped->signer_info;
776 os = p7->d.signed_and_enveloped->enc_data->enc_data;
777 if (!os) {
778 os = M_ASN1_OCTET_STRING_new();
779 if (!os) {
780 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
781 goto err;
782 }
783 p7->d.signed_and_enveloped->enc_data->enc_data = os;
784 }
785 break;
786 case NID_pkcs7_enveloped:
787 /* XXXXXXXXXXXXXXXX */
788 os = p7->d.enveloped->enc_data->enc_data;
789 if (!os) {
790 os = M_ASN1_OCTET_STRING_new();
791 if (!os) {
792 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
793 goto err;
794 }
795 p7->d.enveloped->enc_data->enc_data = os;
796 }
797 break;
798 case NID_pkcs7_signed:
799 si_sk = p7->d.sign->signer_info;
800 os = PKCS7_get_octet_string(p7->d.sign->contents);
801 /* If detached data then the content is excluded */
802 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
803 M_ASN1_OCTET_STRING_free(os);
804 os = NULL;
805 p7->d.sign->contents->d.data = NULL;
806 }
807 break;
808
809 case NID_pkcs7_digest:
810 os = PKCS7_get_octet_string(p7->d.digest->contents);
811 /* If detached data then the content is excluded */
812 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
813 M_ASN1_OCTET_STRING_free(os);
814 os = NULL;
815 p7->d.digest->contents->d.data = NULL;
816 }
817 break;
818
819 default:
820 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
821 goto err;
822 }
823
824 if (si_sk != NULL) {
825 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
826 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
827 if (si->pkey == NULL)
828 continue;
829
830 j = OBJ_obj2nid(si->digest_alg->algorithm);
831
832 btmp = bio;
833
834 btmp = PKCS7_find_digest(&mdc, btmp, j);
835
836 if (btmp == NULL)
837 goto err;
838
839 /*
840 * We now have the EVP_MD_CTX, lets do the signing.
841 */
842 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
843 goto err;
844
845 sk = si->auth_attr;
846
847 /*
848 * If there are attributes, we add the digest attribute and only
849 * sign the attributes
850 */
851 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
852 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
853 goto err;
854 } else {
855 unsigned char *abuf = NULL;
856 unsigned int abuflen;
857 abuflen = EVP_PKEY_size(si->pkey);
858 abuf = OPENSSL_malloc(abuflen);
859 if (!abuf)
860 goto err;
861
862 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
863 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
864 goto err;
865 }
866 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
867 }
868 }
869 } else if (i == NID_pkcs7_digest) {
870 unsigned char md_data[EVP_MAX_MD_SIZE];
871 unsigned int md_len;
872 if (!PKCS7_find_digest(&mdc, bio,
873 OBJ_obj2nid(p7->d.digest->md->algorithm)))
874 goto err;
875 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
876 goto err;
877 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
878 }
879
880 if (!PKCS7_is_detached(p7)) {
881 /*
882 * NOTE(emilia): I think we only reach os == NULL here because detached
883 * digested data support is broken.
884 */
885 if (os == NULL)
886 goto err;
887 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
888 char *cont;
889 long contlen;
890 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
891 if (btmp == NULL) {
892 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
893 goto err;
894 }
895 contlen = BIO_get_mem_data(btmp, &cont);
896 /*
897 * Mark the BIO read only then we can use its copy of the data
898 * instead of making an extra copy.
899 */
900 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
901 BIO_set_mem_eof_return(btmp, 0);
902 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
903 }
904 }
905 ret = 1;
906 err:
907 EVP_MD_CTX_cleanup(&ctx_tmp);
908 return (ret);
909 }
910
911 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
912 {
913 EVP_MD_CTX mctx;
914 EVP_PKEY_CTX *pctx;
915 unsigned char *abuf = NULL;
916 int alen;
917 size_t siglen;
918 const EVP_MD *md = NULL;
919
920 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
921 if (md == NULL)
922 return 0;
923
924 EVP_MD_CTX_init(&mctx);
925 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
926 goto err;
927
928 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
929 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
930 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
931 goto err;
932 }
933
934 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
935 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
936 if (!abuf)
937 goto err;
938 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
939 goto err;
940 OPENSSL_free(abuf);
941 abuf = NULL;
942 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
943 goto err;
944 abuf = OPENSSL_malloc(siglen);
945 if (!abuf)
946 goto err;
947 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
948 goto err;
949
950 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
951 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
952 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
953 goto err;
954 }
955
956 EVP_MD_CTX_cleanup(&mctx);
957
958 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
959
960 return 1;
961
962 err:
963 if (abuf)
964 OPENSSL_free(abuf);
965 EVP_MD_CTX_cleanup(&mctx);
966 return 0;
967
968 }
969
970 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
971 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
972 {
973 PKCS7_ISSUER_AND_SERIAL *ias;
974 int ret = 0, i;
975 STACK_OF(X509) *cert;
976 X509 *x509;
977
978 if (p7 == NULL) {
979 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
980 return 0;
981 }
982
983 if (p7->d.ptr == NULL) {
984 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
985 return 0;
986 }
987
988 if (PKCS7_type_is_signed(p7)) {
989 cert = p7->d.sign->cert;
990 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
991 cert = p7->d.signed_and_enveloped->cert;
992 } else {
993 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
994 goto err;
995 }
996 /* XXXXXXXXXXXXXXXXXXXXXXX */
997 ias = si->issuer_and_serial;
998
999 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
1000
1001 /* were we able to find the cert in passed to us */
1002 if (x509 == NULL) {
1003 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
1004 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
1005 goto err;
1006 }
1007
1008 /* Lets verify */
1009 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
1010 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1011 goto err;
1012 }
1013 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
1014 i = X509_verify_cert(ctx);
1015 if (i <= 0) {
1016 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1017 X509_STORE_CTX_cleanup(ctx);
1018 goto err;
1019 }
1020 X509_STORE_CTX_cleanup(ctx);
1021
1022 return PKCS7_signatureVerify(bio, p7, si, x509);
1023 err:
1024 return ret;
1025 }
1026
1027 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
1028 X509 *x509)
1029 {
1030 ASN1_OCTET_STRING *os;
1031 EVP_MD_CTX mdc_tmp, *mdc;
1032 int ret = 0, i;
1033 int md_type;
1034 STACK_OF(X509_ATTRIBUTE) *sk;
1035 BIO *btmp;
1036 EVP_PKEY *pkey;
1037
1038 EVP_MD_CTX_init(&mdc_tmp);
1039
1040 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
1041 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
1042 goto err;
1043 }
1044
1045 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1046
1047 btmp = bio;
1048 for (;;) {
1049 if ((btmp == NULL) ||
1050 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
1051 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1052 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1053 goto err;
1054 }
1055 BIO_get_md_ctx(btmp, &mdc);
1056 if (mdc == NULL) {
1057 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
1058 goto err;
1059 }
1060 if (EVP_MD_CTX_type(mdc) == md_type)
1061 break;
1062 /*
1063 * Workaround for some broken clients that put the signature OID
1064 * instead of the digest OID in digest_alg->algorithm
1065 */
1066 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1067 break;
1068 btmp = BIO_next(btmp);
1069 }
1070
1071 /*
1072 * mdc is the digest ctx that we want, unless there are attributes, in
1073 * which case the digest is the signed attributes
1074 */
1075 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1076 goto err;
1077
1078 sk = si->auth_attr;
1079 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1080 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1081 unsigned int md_len;
1082 int alen;
1083 ASN1_OCTET_STRING *message_digest;
1084
1085 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1086 goto err;
1087 message_digest = PKCS7_digest_from_attributes(sk);
1088 if (!message_digest) {
1089 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1090 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1091 goto err;
1092 }
1093 if ((message_digest->length != (int)md_len) ||
1094 (memcmp(message_digest->data, md_dat, md_len))) {
1095 #if 0
1096 {
1097 int ii;
1098 for (ii = 0; ii < message_digest->length; ii++)
1099 printf("%02X", message_digest->data[ii]);
1100 printf(" sent\n");
1101 for (ii = 0; ii < md_len; ii++)
1102 printf("%02X", md_dat[ii]);
1103 printf(" calc\n");
1104 }
1105 #endif
1106 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1107 ret = -1;
1108 goto err;
1109 }
1110
1111 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1112 goto err;
1113
1114 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1115 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1116 if (alen <= 0) {
1117 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1118 ret = -1;
1119 goto err;
1120 }
1121 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1122 goto err;
1123
1124 OPENSSL_free(abuf);
1125 }
1126
1127 os = si->enc_digest;
1128 pkey = X509_get_pubkey(x509);
1129 if (!pkey) {
1130 ret = -1;
1131 goto err;
1132 }
1133
1134 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1135 EVP_PKEY_free(pkey);
1136 if (i <= 0) {
1137 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1138 ret = -1;
1139 goto err;
1140 } else
1141 ret = 1;
1142 err:
1143 EVP_MD_CTX_cleanup(&mdc_tmp);
1144 return (ret);
1145 }
1146
1147 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1148 {
1149 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1150 PKCS7_RECIP_INFO *ri;
1151 int i;
1152
1153 i = OBJ_obj2nid(p7->type);
1154 if (i != NID_pkcs7_signedAndEnveloped)
1155 return NULL;
1156 if (p7->d.signed_and_enveloped == NULL)
1157 return NULL;
1158 rsk = p7->d.signed_and_enveloped->recipientinfo;
1159 if (rsk == NULL)
1160 return NULL;
1161 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1162 return (NULL);
1163 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1164 return (ri->issuer_and_serial);
1165 }
1166
1167 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1168 {
1169 return (get_attribute(si->auth_attr, nid));
1170 }
1171
1172 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1173 {
1174 return (get_attribute(si->unauth_attr, nid));
1175 }
1176
1177 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1178 {
1179 int i;
1180 X509_ATTRIBUTE *xa;
1181 ASN1_OBJECT *o;
1182
1183 o = OBJ_nid2obj(nid);
1184 if (!o || !sk)
1185 return (NULL);
1186 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1187 xa = sk_X509_ATTRIBUTE_value(sk, i);
1188 if (OBJ_cmp(xa->object, o) == 0) {
1189 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1190 return (sk_ASN1_TYPE_value(xa->value.set, 0));
1191 else
1192 return (NULL);
1193 }
1194 }
1195 return (NULL);
1196 }
1197
1198 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1199 {
1200 ASN1_TYPE *astype;
1201 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1202 return NULL;
1203 return astype->value.octet_string;
1204 }
1205
1206 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1207 STACK_OF(X509_ATTRIBUTE) *sk)
1208 {
1209 int i;
1210
1211 if (p7si->auth_attr != NULL)
1212 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1213 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1214 if (p7si->auth_attr == NULL)
1215 return 0;
1216 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1217 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1218 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1219 (sk, i))))
1220 == NULL)
1221 return (0);
1222 }
1223 return (1);
1224 }
1225
1226 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1227 STACK_OF(X509_ATTRIBUTE) *sk)
1228 {
1229 int i;
1230
1231 if (p7si->unauth_attr != NULL)
1232 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1233 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1234 if (p7si->unauth_attr == NULL)
1235 return 0;
1236 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1237 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1238 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1239 (sk, i))))
1240 == NULL)
1241 return (0);
1242 }
1243 return (1);
1244 }
1245
1246 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1247 void *value)
1248 {
1249 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1250 }
1251
1252 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1253 void *value)
1254 {
1255 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1256 }
1257
1258 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1259 void *value)
1260 {
1261 X509_ATTRIBUTE *attr = NULL;
1262
1263 if (*sk == NULL) {
1264 *sk = sk_X509_ATTRIBUTE_new_null();
1265 if (*sk == NULL)
1266 return 0;
1267 new_attrib:
1268 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1269 return 0;
1270 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1271 X509_ATTRIBUTE_free(attr);
1272 return 0;
1273 }
1274 } else {
1275 int i;
1276
1277 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1278 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1279 if (OBJ_obj2nid(attr->object) == nid) {
1280 X509_ATTRIBUTE_free(attr);
1281 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1282 if (attr == NULL)
1283 return 0;
1284 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1285 X509_ATTRIBUTE_free(attr);
1286 return 0;
1287 }
1288 goto end;
1289 }
1290 }
1291 goto new_attrib;
1292 }
1293 end:
1294 return (1);
1295 }
Tomato firmware and modifications.