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authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/pkcs7/pk7_doit.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
openbsd-libressl-v2.1.5.tar.bz2
openbsd-libressl-v2.1.5.zip
This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libcrypto/pkcs7/pk7_doit.c')
-rw-r--r--src/lib/libcrypto/pkcs7/pk7_doit.c1217
1 files changed, 0 insertions, 1217 deletions
diff --git a/src/lib/libcrypto/pkcs7/pk7_doit.c b/src/lib/libcrypto/pkcs7/pk7_doit.c
deleted file mode 100644
index 252fab04d7..0000000000
--- a/src/lib/libcrypto/pkcs7/pk7_doit.c
+++ /dev/null
@@ -1,1217 +0,0 @@
1/* $OpenBSD: pk7_doit.c,v 1.31 2015/02/07 13:19:15 doug Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62
63#include <openssl/err.h>
64#include <openssl/objects.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67
68static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
69 void *value);
70static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
71
72static int
73PKCS7_type_is_other(PKCS7* p7)
74{
75 int isOther = 1;
76
77 int nid = OBJ_obj2nid(p7->type);
78
79 switch (nid ) {
80 case NID_pkcs7_data:
81 case NID_pkcs7_signed:
82 case NID_pkcs7_enveloped:
83 case NID_pkcs7_signedAndEnveloped:
84 case NID_pkcs7_digest:
85 case NID_pkcs7_encrypted:
86 isOther = 0;
87 break;
88 default:
89 isOther = 1;
90 }
91
92 return isOther;
93
94}
95
96static ASN1_OCTET_STRING *
97PKCS7_get_octet_string(PKCS7 *p7)
98{
99 if (PKCS7_type_is_data(p7))
100 return p7->d.data;
101 if (PKCS7_type_is_other(p7) && p7->d.other &&
102 (p7->d.other->type == V_ASN1_OCTET_STRING))
103 return p7->d.other->value.octet_string;
104 return NULL;
105}
106
107static int
108PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
109{
110 BIO *btmp;
111 const EVP_MD *md;
112 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
113 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
114 goto err;
115 }
116
117 md = EVP_get_digestbyobj(alg->algorithm);
118 if (md == NULL) {
119 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,
120 PKCS7_R_UNKNOWN_DIGEST_TYPE);
121 goto err;
122 }
123
124 BIO_set_md(btmp, md);
125 if (*pbio == NULL)
126 *pbio = btmp;
127 else if (!BIO_push(*pbio, btmp)) {
128 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
129 goto err;
130 }
131 btmp = NULL;
132
133 return 1;
134
135err:
136 BIO_free(btmp);
137 return 0;
138
139}
140
141static int
142pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, 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 if (!pkey)
152 return 0;
153
154 pctx = EVP_PKEY_CTX_new(pkey, NULL);
155 if (!pctx)
156 return 0;
157
158 if (EVP_PKEY_encrypt_init(pctx) <= 0)
159 goto err;
160
161 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
162 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
163 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
164 goto err;
165 }
166
167 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
168 goto err;
169
170 ek = malloc(eklen);
171
172 if (ek == NULL) {
173 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
174 goto err;
175 }
176
177 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
178 goto err;
179
180 ASN1_STRING_set0(ri->enc_key, ek, eklen);
181 ek = NULL;
182
183 ret = 1;
184
185err:
186 EVP_PKEY_free(pkey);
187 EVP_PKEY_CTX_free(pctx);
188 free(ek);
189 return ret;
190}
191
192
193static int
194pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, PKCS7_RECIP_INFO *ri,
195 EVP_PKEY *pkey)
196{
197 EVP_PKEY_CTX *pctx = NULL;
198 unsigned char *ek = NULL;
199 size_t eklen;
200
201 int ret = -1;
202
203 pctx = EVP_PKEY_CTX_new(pkey, NULL);
204 if (!pctx)
205 return -1;
206
207 if (EVP_PKEY_decrypt_init(pctx) <= 0)
208 goto err;
209
210 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
211 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
212 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
213 goto err;
214 }
215
216 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
217 ri->enc_key->data, ri->enc_key->length) <= 0)
218 goto err;
219
220 ek = malloc(eklen);
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 free(*pek);
238 }
239
240 *pek = ek;
241 *peklen = eklen;
242
243err:
244 EVP_PKEY_CTX_free(pctx);
245 if (!ret && ek)
246 free(ek);
247
248 return ret;
249}
250
251BIO *
252PKCS7_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 i = OBJ_obj2nid(p7->type);
265 p7->state = PKCS7_S_HEADER;
266
267 switch (i) {
268 case NID_pkcs7_signed:
269 md_sk = p7->d.sign->md_algs;
270 os = PKCS7_get_octet_string(p7->d.sign->contents);
271 break;
272 case NID_pkcs7_signedAndEnveloped:
273 rsk = p7->d.signed_and_enveloped->recipientinfo;
274 md_sk = p7->d.signed_and_enveloped->md_algs;
275 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
276 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
277 if (evp_cipher == NULL) {
278 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
279 PKCS7_R_CIPHER_NOT_INITIALIZED);
280 goto err;
281 }
282 break;
283 case NID_pkcs7_enveloped:
284 rsk = p7->d.enveloped->recipientinfo;
285 xalg = p7->d.enveloped->enc_data->algorithm;
286 evp_cipher = p7->d.enveloped->enc_data->cipher;
287 if (evp_cipher == NULL) {
288 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
289 PKCS7_R_CIPHER_NOT_INITIALIZED);
290 goto err;
291 }
292 break;
293 case NID_pkcs7_digest:
294 xa = p7->d.digest->md;
295 os = PKCS7_get_octet_string(p7->d.digest->contents);
296 break;
297 case NID_pkcs7_data:
298 break;
299 default:
300 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
301 PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
302 goto err;
303 }
304
305 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
306 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
307 goto err;
308
309 if (xa && !PKCS7_bio_add_digest(&out, xa))
310 goto err;
311
312 if (evp_cipher != NULL) {
313 unsigned char key[EVP_MAX_KEY_LENGTH];
314 unsigned char iv[EVP_MAX_IV_LENGTH];
315 int keylen, ivlen;
316 EVP_CIPHER_CTX *ctx;
317
318 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
319 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
320 goto err;
321 }
322 BIO_get_cipher_ctx(btmp, &ctx);
323 keylen = EVP_CIPHER_key_length(evp_cipher);
324 ivlen = EVP_CIPHER_iv_length(evp_cipher);
325 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
326 if (ivlen > 0)
327 arc4random_buf(iv, ivlen);
328 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL,
329 NULL, 1) <= 0)
330 goto err;
331 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
332 goto err;
333 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
334 goto err;
335
336 if (ivlen > 0) {
337 if (xalg->parameter == NULL) {
338 xalg->parameter = ASN1_TYPE_new();
339 if (xalg->parameter == NULL)
340 goto err;
341 }
342 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
343 goto err;
344 }
345
346 /* Lets do the pub key stuff :-) */
347 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
348 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
349 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
350 goto err;
351 }
352 OPENSSL_cleanse(key, keylen);
353
354 if (out == NULL)
355 out = btmp;
356 else
357 BIO_push(out, btmp);
358 btmp = NULL;
359 }
360
361 if (bio == NULL) {
362 if (PKCS7_is_detached(p7))
363 bio = BIO_new(BIO_s_null());
364 else if (os && os->length > 0)
365 bio = BIO_new_mem_buf(os->data, os->length);
366 if (bio == NULL) {
367 bio = BIO_new(BIO_s_mem());
368 if (bio == NULL)
369 goto err;
370 BIO_set_mem_eof_return(bio, 0);
371 }
372 }
373 if (out)
374 BIO_push(out, bio);
375 else
376 out = bio;
377 bio = NULL;
378 if (0) {
379err:
380 if (out != NULL)
381 BIO_free_all(out);
382 if (btmp != NULL)
383 BIO_free_all(btmp);
384 out = NULL;
385 }
386 return (out);
387}
388
389static int
390pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
391{
392 int ret;
393
394 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
395 pcert->cert_info->issuer);
396 if (ret)
397 return ret;
398 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
399 ri->issuer_and_serial->serial);
400}
401
402/* int */
403BIO *
404PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
405{
406 int i, j;
407 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
408 X509_ALGOR *xa;
409 ASN1_OCTET_STRING *data_body = NULL;
410 const EVP_MD *evp_md;
411 const EVP_CIPHER *evp_cipher = NULL;
412 EVP_CIPHER_CTX *evp_ctx = NULL;
413 X509_ALGOR *enc_alg = NULL;
414 STACK_OF(X509_ALGOR) *md_sk = NULL;
415 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
416 PKCS7_RECIP_INFO *ri = NULL;
417 unsigned char *ek = NULL, *tkey = NULL;
418 int eklen = 0, tkeylen = 0;
419
420 i = OBJ_obj2nid(p7->type);
421 p7->state = PKCS7_S_HEADER;
422
423 switch (i) {
424 case NID_pkcs7_signed:
425 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
426 md_sk = p7->d.sign->md_algs;
427 break;
428 case NID_pkcs7_signedAndEnveloped:
429 rsk = p7->d.signed_and_enveloped->recipientinfo;
430 md_sk = p7->d.signed_and_enveloped->md_algs;
431 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
432 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
433 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
434 if (evp_cipher == NULL) {
435 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
436 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
437 goto err;
438 }
439 break;
440 case NID_pkcs7_enveloped:
441 rsk = p7->d.enveloped->recipientinfo;
442 enc_alg = p7->d.enveloped->enc_data->algorithm;
443 data_body = p7->d.enveloped->enc_data->enc_data;
444 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
445 if (evp_cipher == NULL) {
446 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
447 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
448 goto err;
449 }
450 break;
451 default:
452 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
453 PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
454 goto err;
455 }
456
457 /* We will be checking the signature */
458 if (md_sk != NULL) {
459 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
460 xa = sk_X509_ALGOR_value(md_sk, i);
461 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
462 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
463 ERR_R_BIO_LIB);
464 goto err;
465 }
466
467 j = OBJ_obj2nid(xa->algorithm);
468 evp_md = EVP_get_digestbynid(j);
469 if (evp_md == NULL) {
470 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
471 PKCS7_R_UNKNOWN_DIGEST_TYPE);
472 goto err;
473 }
474
475 BIO_set_md(btmp, evp_md);
476 if (out == NULL)
477 out = btmp;
478 else
479 BIO_push(out, btmp);
480 btmp = NULL;
481 }
482 }
483
484 if (evp_cipher != NULL) {
485 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
486 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
487 goto err;
488 }
489
490 /* It was encrypted, we need to decrypt the secret key
491 * with the private key */
492
493 /* Find the recipientInfo which matches the passed certificate
494 * (if any)
495 */
496 if (pcert) {
497 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
498 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
499 if (!pkcs7_cmp_ri(ri, pcert))
500 break;
501 ri = NULL;
502 }
503 if (ri == NULL) {
504 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
505 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
506 goto err;
507 }
508 }
509
510 /* If we haven't got a certificate try each ri in turn */
511 if (pcert == NULL) {
512 /* Always attempt to decrypt all rinfo even
513 * after sucess as a defence against MMA timing
514 * attacks.
515 */
516 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
517 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
518
519 if (pkcs7_decrypt_rinfo(&ek, &eklen,
520 ri, pkey) < 0)
521 goto err;
522 ERR_clear_error();
523 }
524 } else {
525 /* Only exit on fatal errors, not decrypt failure */
526 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
527 goto err;
528 ERR_clear_error();
529 }
530
531 evp_ctx = NULL;
532 BIO_get_cipher_ctx(etmp, &evp_ctx);
533 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL,
534 NULL, 0) <= 0)
535 goto err;
536 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
537 goto err;
538 /* Generate random key as MMA defence */
539 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
540 tkey = malloc(tkeylen);
541 if (!tkey)
542 goto err;
543 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
544 goto err;
545 if (ek == NULL) {
546 ek = tkey;
547 eklen = tkeylen;
548 tkey = NULL;
549 }
550
551 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
552 /* Some S/MIME clients don't use the same key
553 * and effective key length. The key length is
554 * determined by the size of the decrypted RSA key.
555 */
556 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
557 /* Use random key as MMA defence */
558 OPENSSL_cleanse(ek, eklen);
559 free(ek);
560 ek = tkey;
561 eklen = tkeylen;
562 tkey = NULL;
563 }
564 }
565 /* Clear errors so we don't leak information useful in MMA */
566 ERR_clear_error();
567 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
568 goto err;
569
570 if (ek) {
571 OPENSSL_cleanse(ek, eklen);
572 free(ek);
573 ek = NULL;
574 }
575 if (tkey) {
576 OPENSSL_cleanse(tkey, tkeylen);
577 free(tkey);
578 tkey = NULL;
579 }
580
581 if (out == NULL)
582 out = etmp;
583 else
584 BIO_push(out, etmp);
585 etmp = NULL;
586 }
587
588 if (PKCS7_is_detached(p7) || (in_bio != NULL)) {
589 bio = in_bio;
590 } else {
591 if (data_body != NULL && data_body->length > 0)
592 bio = BIO_new_mem_buf(data_body->data, data_body->length);
593 else {
594 bio = BIO_new(BIO_s_mem());
595 BIO_set_mem_eof_return(bio, 0);
596 }
597 if (bio == NULL)
598 goto err;
599 }
600 BIO_push(out, bio);
601 bio = NULL;
602
603 if (0) {
604err:
605 if (ek) {
606 OPENSSL_cleanse(ek, eklen);
607 free(ek);
608 }
609 if (tkey) {
610 OPENSSL_cleanse(tkey, tkeylen);
611 free(tkey);
612 }
613 if (out != NULL)
614 BIO_free_all(out);
615 if (btmp != NULL)
616 BIO_free_all(btmp);
617 if (etmp != NULL)
618 BIO_free_all(etmp);
619 if (bio != NULL)
620 BIO_free_all(bio);
621 out = NULL;
622 }
623 return (out);
624}
625
626static BIO *
627PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
628{
629 for (;;) {
630 bio = BIO_find_type(bio, BIO_TYPE_MD);
631 if (bio == NULL) {
632 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
633 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
634 return NULL;
635 }
636 BIO_get_md_ctx(bio, pmd);
637 if (*pmd == NULL) {
638 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
639 ERR_R_INTERNAL_ERROR);
640 return NULL;
641 }
642 if (EVP_MD_CTX_type(*pmd) == nid)
643 return bio;
644 bio = BIO_next(bio);
645 }
646 return NULL;
647}
648
649static int
650do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
651{
652 unsigned char md_data[EVP_MAX_MD_SIZE];
653 unsigned int md_len;
654
655 /* Add signing time if not already present */
656 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
657 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
658 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
659 ERR_R_MALLOC_FAILURE);
660 return 0;
661 }
662 }
663
664 /* Add digest */
665 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
666 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
667 return 0;
668 }
669 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
670 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
671 return 0;
672 }
673
674 /* Now sign the attributes */
675 if (!PKCS7_SIGNER_INFO_sign(si))
676 return 0;
677
678 return 1;
679}
680
681
682int
683PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
684{
685 int ret = 0;
686 int i, j;
687 BIO *btmp;
688 PKCS7_SIGNER_INFO *si;
689 EVP_MD_CTX *mdc, ctx_tmp;
690 STACK_OF(X509_ATTRIBUTE) *sk;
691 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
692 ASN1_OCTET_STRING *os = NULL;
693
694 EVP_MD_CTX_init(&ctx_tmp);
695 i = OBJ_obj2nid(p7->type);
696 p7->state = PKCS7_S_HEADER;
697
698 switch (i) {
699 case NID_pkcs7_data:
700 os = p7->d.data;
701 break;
702 case NID_pkcs7_signedAndEnveloped:
703 /* XXX */
704 si_sk = p7->d.signed_and_enveloped->signer_info;
705 os = p7->d.signed_and_enveloped->enc_data->enc_data;
706 if (!os) {
707 os = M_ASN1_OCTET_STRING_new();
708 if (!os) {
709 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
710 ERR_R_MALLOC_FAILURE);
711 goto err;
712 }
713 p7->d.signed_and_enveloped->enc_data->enc_data = os;
714 }
715 break;
716 case NID_pkcs7_enveloped:
717 /* XXX */
718 os = p7->d.enveloped->enc_data->enc_data;
719 if (!os) {
720 os = M_ASN1_OCTET_STRING_new();
721 if (!os) {
722 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
723 ERR_R_MALLOC_FAILURE);
724 goto err;
725 }
726 p7->d.enveloped->enc_data->enc_data = os;
727 }
728 break;
729 case NID_pkcs7_signed:
730 si_sk = p7->d.sign->signer_info;
731 os = PKCS7_get_octet_string(p7->d.sign->contents);
732 if (!PKCS7_is_detached(p7) && os == NULL) {
733 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_DECODE_ERROR);
734 goto err;
735 }
736 /* If detached data then the content is excluded */
737 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
738 M_ASN1_OCTET_STRING_free(os);
739 p7->d.sign->contents->d.data = NULL;
740 }
741 break;
742
743 case NID_pkcs7_digest:
744 os = PKCS7_get_octet_string(p7->d.digest->contents);
745 if (os == NULL) {
746 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_DECODE_ERROR);
747 goto err;
748 }
749 /* If detached data then the content is excluded */
750 if (PKCS7_type_is_data(p7->d.digest->contents) &&
751 p7->detached) {
752 M_ASN1_OCTET_STRING_free(os);
753 p7->d.digest->contents->d.data = NULL;
754 }
755 break;
756
757 default:
758 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
759 PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
760 goto err;
761 }
762
763 if (si_sk != NULL) {
764 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
765 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
766 if (si->pkey == NULL)
767 continue;
768
769 j = OBJ_obj2nid(si->digest_alg->algorithm);
770
771 btmp = bio;
772
773 btmp = PKCS7_find_digest(&mdc, btmp, j);
774
775 if (btmp == NULL)
776 goto err;
777
778 /* We now have the EVP_MD_CTX, lets do the
779 * signing. */
780 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
781 goto err;
782
783 sk = si->auth_attr;
784
785 /* If there are attributes, we add the digest
786 * attribute and only sign the attributes */
787 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
788 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
789 goto err;
790 } else {
791 unsigned char *abuf = NULL;
792 unsigned int abuflen;
793 abuflen = EVP_PKEY_size(si->pkey);
794 abuf = malloc(abuflen);
795 if (!abuf)
796 goto err;
797
798 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
799 si->pkey)) {
800 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
801 ERR_R_EVP_LIB);
802 goto err;
803 }
804 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
805 }
806 }
807 } else if (i == NID_pkcs7_digest) {
808 unsigned char md_data[EVP_MAX_MD_SIZE];
809 unsigned int md_len;
810 if (!PKCS7_find_digest(&mdc, bio,
811 OBJ_obj2nid(p7->d.digest->md->algorithm)))
812 goto err;
813 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
814 goto err;
815 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
816 }
817
818 if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF)) {
819 char *cont;
820 long contlen;
821 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
822 if (btmp == NULL) {
823 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
824 PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
825 goto err;
826 }
827 contlen = BIO_get_mem_data(btmp, &cont);
828 /* Mark the BIO read only then we can use its copy of the data
829 * instead of making an extra copy.
830 */
831 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
832 BIO_set_mem_eof_return(btmp, 0);
833 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
834 }
835 ret = 1;
836err:
837 EVP_MD_CTX_cleanup(&ctx_tmp);
838 return (ret);
839}
840
841int
842PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
843{
844 EVP_MD_CTX mctx;
845 EVP_PKEY_CTX *pctx;
846 unsigned char *abuf = NULL;
847 int alen;
848 size_t siglen;
849 const EVP_MD *md = NULL;
850
851 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
852 if (md == NULL)
853 return 0;
854
855 EVP_MD_CTX_init(&mctx);
856 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
857 goto err;
858
859 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
860 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
861 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
862 goto err;
863 }
864
865 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
866 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
867 if (!abuf)
868 goto err;
869 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
870 goto err;
871 free(abuf);
872 abuf = NULL;
873 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
874 goto err;
875 abuf = malloc(siglen);
876 if (!abuf)
877 goto err;
878 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
879 goto err;
880
881 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
882 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
883 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
884 goto err;
885 }
886
887 EVP_MD_CTX_cleanup(&mctx);
888
889 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
890
891 return 1;
892
893err:
894 free(abuf);
895 EVP_MD_CTX_cleanup(&mctx);
896 return 0;
897}
898
899int
900PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
901 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
902{
903 PKCS7_ISSUER_AND_SERIAL *ias;
904 int ret = 0, i;
905 STACK_OF(X509) *cert;
906 X509 *x509;
907
908 if (PKCS7_type_is_signed(p7)) {
909 cert = p7->d.sign->cert;
910 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
911 cert = p7->d.signed_and_enveloped->cert;
912 } else {
913 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
914 goto err;
915 }
916 /* XXXX */
917 ias = si->issuer_and_serial;
918
919 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
920
921 /* were we able to find the cert in passed to us */
922 if (x509 == NULL) {
923 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
924 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
925 goto err;
926 }
927
928 /* Lets verify */
929 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
930 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
931 goto err;
932 }
933 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
934 i = X509_verify_cert(ctx);
935 if (i <= 0) {
936 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
937 X509_STORE_CTX_cleanup(ctx);
938 goto err;
939 }
940 X509_STORE_CTX_cleanup(ctx);
941
942 return PKCS7_signatureVerify(bio, p7, si, x509);
943err:
944 return ret;
945}
946
947int
948PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, X509 *x509)
949{
950 ASN1_OCTET_STRING *os;
951 EVP_MD_CTX mdc_tmp, *mdc;
952 int ret = 0, i;
953 int md_type;
954 STACK_OF(X509_ATTRIBUTE) *sk;
955 BIO *btmp;
956 EVP_PKEY *pkey;
957
958 EVP_MD_CTX_init(&mdc_tmp);
959
960 if (!PKCS7_type_is_signed(p7) &&
961 !PKCS7_type_is_signedAndEnveloped(p7)) {
962 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
963 PKCS7_R_WRONG_PKCS7_TYPE);
964 goto err;
965 }
966
967 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
968
969 btmp = bio;
970 for (;;) {
971 if ((btmp == NULL) ||
972 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
973 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
974 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
975 goto err;
976 }
977 BIO_get_md_ctx(btmp, &mdc);
978 if (mdc == NULL) {
979 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
980 ERR_R_INTERNAL_ERROR);
981 goto err;
982 }
983 if (EVP_MD_CTX_type(mdc) == md_type)
984 break;
985 /* Workaround for some broken clients that put the signature
986 * OID instead of the digest OID in digest_alg->algorithm
987 */
988 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
989 break;
990 btmp = BIO_next(btmp);
991 }
992
993 /* mdc is the digest ctx that we want, unless there are attributes,
994 * in which case the digest is the signed attributes */
995 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
996 goto err;
997
998 sk = si->auth_attr;
999 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1000 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1001 unsigned int md_len;
1002 int alen;
1003 ASN1_OCTET_STRING *message_digest;
1004
1005 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1006 goto err;
1007 message_digest = PKCS7_digest_from_attributes(sk);
1008 if (!message_digest) {
1009 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1010 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1011 goto err;
1012 }
1013 if ((message_digest->length != (int)md_len) ||
1014 (memcmp(message_digest->data, md_dat, md_len))) {
1015 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1016 PKCS7_R_DIGEST_FAILURE);
1017 ret = -1;
1018 goto err;
1019 }
1020
1021 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type),
1022 NULL))
1023 goto err;
1024
1025 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1026 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1027 if (alen <= 0) {
1028 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1029 ret = -1;
1030 goto err;
1031 }
1032 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1033 goto err;
1034
1035 free(abuf);
1036 }
1037
1038 os = si->enc_digest;
1039 pkey = X509_get_pubkey(x509);
1040 if (!pkey) {
1041 ret = -1;
1042 goto err;
1043 }
1044
1045 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1046 EVP_PKEY_free(pkey);
1047 if (i <= 0) {
1048 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1049 PKCS7_R_SIGNATURE_FAILURE);
1050 ret = -1;
1051 goto err;
1052 } else
1053 ret = 1;
1054err:
1055 EVP_MD_CTX_cleanup(&mdc_tmp);
1056 return (ret);
1057}
1058
1059PKCS7_ISSUER_AND_SERIAL *
1060PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1061{
1062 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1063 PKCS7_RECIP_INFO *ri;
1064 int i;
1065
1066 i = OBJ_obj2nid(p7->type);
1067 if (i != NID_pkcs7_signedAndEnveloped)
1068 return NULL;
1069 if (p7->d.signed_and_enveloped == NULL)
1070 return NULL;
1071 rsk = p7->d.signed_and_enveloped->recipientinfo;
1072 if (rsk == NULL)
1073 return NULL;
1074 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1075 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1076 return (NULL);
1077 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1078 return (ri->issuer_and_serial);
1079}
1080
1081ASN1_TYPE *
1082PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1083{
1084 return (get_attribute(si->auth_attr, nid));
1085}
1086
1087ASN1_TYPE *
1088PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1089{
1090 return (get_attribute(si->unauth_attr, nid));
1091}
1092
1093static ASN1_TYPE *
1094get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1095{
1096 int i;
1097 X509_ATTRIBUTE *xa;
1098 ASN1_OBJECT *o;
1099
1100 o = OBJ_nid2obj(nid);
1101 if (!o || !sk)
1102 return (NULL);
1103 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1104 xa = sk_X509_ATTRIBUTE_value(sk, i);
1105 if (OBJ_cmp(xa->object, o) == 0) {
1106 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1107 return (sk_ASN1_TYPE_value(xa->value.set, 0));
1108 else
1109 return (NULL);
1110 }
1111 }
1112 return (NULL);
1113}
1114
1115ASN1_OCTET_STRING *
1116PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1117{
1118 ASN1_TYPE *astype;
1119
1120 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1121 return NULL;
1122 return astype->value.octet_string;
1123}
1124
1125int
1126PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1127 STACK_OF(X509_ATTRIBUTE) *sk)
1128{
1129 int i;
1130
1131 if (p7si->auth_attr != NULL)
1132 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,
1133 X509_ATTRIBUTE_free);
1134 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1135 if (p7si->auth_attr == NULL)
1136 return 0;
1137 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1138 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1139 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk, i))))
1140 == NULL)
1141 return (0);
1142 }
1143 return (1);
1144}
1145
1146int
1147PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1148{
1149 int i;
1150
1151 if (p7si->unauth_attr != NULL)
1152 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1153 X509_ATTRIBUTE_free);
1154 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1155 if (p7si->unauth_attr == NULL)
1156 return 0;
1157 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1158 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1159 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk, i))))
1160 == NULL)
1161 return (0);
1162 }
1163 return (1);
1164}
1165
1166int
1167PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1168 void *value)
1169{
1170 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1171}
1172
1173int
1174PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, void *value)
1175{
1176 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1177}
1178
1179static int
1180add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, void *value)
1181{
1182 X509_ATTRIBUTE *attr = NULL;
1183
1184 if (*sk == NULL) {
1185 *sk = sk_X509_ATTRIBUTE_new_null();
1186 if (*sk == NULL)
1187 return 0;
1188new_attrib:
1189 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1190 return 0;
1191 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1192 X509_ATTRIBUTE_free(attr);
1193 return 0;
1194 }
1195 } else {
1196 int i;
1197
1198 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1199 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1200 if (OBJ_obj2nid(attr->object) == nid) {
1201 X509_ATTRIBUTE_free(attr);
1202 attr = X509_ATTRIBUTE_create(nid, atrtype,
1203 value);
1204 if (attr == NULL)
1205 return 0;
1206 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1207 X509_ATTRIBUTE_free(attr);
1208 return 0;
1209 }
1210 goto end;
1211 }
1212 }
1213 goto new_attrib;
1214 }
1215end:
1216 return (1);
1217}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 07:58:46 +0000