Line data Source code
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 0 : int nid = OBJ_obj2nid(p7->type);
76 :
77 0 : 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 0 : static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
95 : {
96 0 : if (PKCS7_type_is_data(p7))
97 0 : return p7->d.data;
98 0 : if (PKCS7_type_is_other(p7) && p7->d.other
99 0 : && (p7->d.other->type == V_ASN1_OCTET_STRING))
100 0 : return p7->d.other->value.octet_string;
101 : return NULL;
102 : }
103 :
104 0 : static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
105 : {
106 : BIO *btmp;
107 : const EVP_MD *md;
108 0 : if ((btmp = BIO_new(BIO_f_md())) == NULL) {
109 0 : PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
110 : goto err;
111 : }
112 :
113 0 : md = EVP_get_digestbyobj(alg->algorithm);
114 0 : if (md == NULL) {
115 0 : PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
116 : goto err;
117 : }
118 :
119 0 : BIO_set_md(btmp, md);
120 0 : if (*pbio == NULL)
121 0 : *pbio = btmp;
122 0 : else if (!BIO_push(*pbio, btmp)) {
123 0 : 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 0 : if (btmp)
132 0 : BIO_free(btmp);
133 : return 0;
134 :
135 : }
136 :
137 0 : 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 0 : pkey = X509_get_pubkey(ri->cert);
147 :
148 0 : if (!pkey)
149 : return 0;
150 :
151 0 : pctx = EVP_PKEY_CTX_new(pkey, NULL);
152 0 : if (!pctx)
153 : return 0;
154 :
155 0 : if (EVP_PKEY_encrypt_init(pctx) <= 0)
156 : goto err;
157 :
158 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
159 : EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
160 0 : PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
161 0 : goto err;
162 : }
163 :
164 0 : if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
165 : goto err;
166 :
167 0 : ek = OPENSSL_malloc(eklen);
168 :
169 0 : if (ek == NULL) {
170 0 : PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
171 0 : goto err;
172 : }
173 :
174 0 : if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
175 : goto err;
176 :
177 0 : ASN1_STRING_set0(ri->enc_key, ek, eklen);
178 : ek = NULL;
179 :
180 : ret = 1;
181 :
182 : err:
183 0 : if (pkey)
184 0 : EVP_PKEY_free(pkey);
185 0 : if (pctx)
186 0 : EVP_PKEY_CTX_free(pctx);
187 0 : if (ek)
188 0 : OPENSSL_free(ek);
189 0 : return ret;
190 :
191 : }
192 :
193 0 : 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 0 : pctx = EVP_PKEY_CTX_new(pkey, NULL);
203 0 : if (!pctx)
204 : return -1;
205 :
206 0 : if (EVP_PKEY_decrypt_init(pctx) <= 0)
207 : goto err;
208 :
209 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
210 : EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
211 0 : PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
212 0 : goto err;
213 : }
214 :
215 0 : if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
216 0 : ri->enc_key->data, ri->enc_key->length) <= 0)
217 : goto err;
218 :
219 0 : ek = OPENSSL_malloc(eklen);
220 :
221 0 : if (ek == NULL) {
222 0 : PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
223 0 : goto err;
224 : }
225 :
226 0 : if (EVP_PKEY_decrypt(pctx, ek, &eklen,
227 0 : ri->enc_key->data, ri->enc_key->length) <= 0) {
228 : ret = 0;
229 0 : PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
230 0 : goto err;
231 : }
232 :
233 : ret = 1;
234 :
235 0 : if (*pek) {
236 0 : OPENSSL_cleanse(*pek, *peklen);
237 0 : OPENSSL_free(*pek);
238 : }
239 :
240 0 : *pek = ek;
241 0 : *peklen = eklen;
242 :
243 : err:
244 0 : if (pctx)
245 0 : EVP_PKEY_CTX_free(pctx);
246 0 : if (!ret && ek)
247 0 : OPENSSL_free(ek);
248 :
249 0 : return ret;
250 : }
251 :
252 0 : BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
253 : {
254 : int i;
255 0 : 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 0 : if (p7 == NULL) {
265 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
266 0 : 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 0 : if (p7->d.ptr == NULL) {
279 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
280 0 : return NULL;
281 : }
282 :
283 0 : i = OBJ_obj2nid(p7->type);
284 0 : p7->state = PKCS7_S_HEADER;
285 :
286 0 : switch (i) {
287 : case NID_pkcs7_signed:
288 0 : md_sk = p7->d.sign->md_algs;
289 0 : os = PKCS7_get_octet_string(p7->d.sign->contents);
290 0 : break;
291 : case NID_pkcs7_signedAndEnveloped:
292 0 : rsk = p7->d.signed_and_enveloped->recipientinfo;
293 0 : md_sk = p7->d.signed_and_enveloped->md_algs;
294 0 : xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
295 0 : evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
296 0 : if (evp_cipher == NULL) {
297 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
298 0 : goto err;
299 : }
300 : break;
301 : case NID_pkcs7_enveloped:
302 0 : rsk = p7->d.enveloped->recipientinfo;
303 0 : xalg = p7->d.enveloped->enc_data->algorithm;
304 0 : evp_cipher = p7->d.enveloped->enc_data->cipher;
305 0 : if (evp_cipher == NULL) {
306 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
307 0 : goto err;
308 : }
309 : break;
310 : case NID_pkcs7_digest:
311 0 : xa = p7->d.digest->md;
312 0 : os = PKCS7_get_octet_string(p7->d.digest->contents);
313 0 : break;
314 : case NID_pkcs7_data:
315 : break;
316 : default:
317 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
318 0 : goto err;
319 : }
320 :
321 0 : for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
322 0 : if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
323 : goto err;
324 :
325 0 : if (xa && !PKCS7_bio_add_digest(&out, xa))
326 : goto err;
327 :
328 0 : 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 0 : if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
335 0 : PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
336 0 : goto err;
337 : }
338 0 : BIO_get_cipher_ctx(btmp, &ctx);
339 0 : keylen = EVP_CIPHER_key_length(evp_cipher);
340 0 : ivlen = EVP_CIPHER_iv_length(evp_cipher);
341 0 : xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
342 0 : if (ivlen > 0)
343 0 : if (RAND_pseudo_bytes(iv, ivlen) <= 0)
344 : goto err;
345 0 : if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
346 : goto err;
347 0 : if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
348 : goto err;
349 0 : if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
350 : goto err;
351 :
352 0 : if (ivlen > 0) {
353 0 : if (xalg->parameter == NULL) {
354 0 : xalg->parameter = ASN1_TYPE_new();
355 0 : if (xalg->parameter == NULL)
356 : goto err;
357 : }
358 0 : if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
359 : goto err;
360 : }
361 :
362 : /* Lets do the pub key stuff :-) */
363 0 : for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
364 0 : ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
365 0 : if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
366 : goto err;
367 : }
368 0 : OPENSSL_cleanse(key, keylen);
369 :
370 0 : if (out == NULL)
371 0 : out = btmp;
372 : else
373 0 : BIO_push(out, btmp);
374 : btmp = NULL;
375 : }
376 :
377 0 : if (bio == NULL) {
378 0 : if (PKCS7_is_detached(p7))
379 0 : bio = BIO_new(BIO_s_null());
380 0 : else if (os && os->length > 0)
381 0 : bio = BIO_new_mem_buf(os->data, os->length);
382 0 : if (bio == NULL) {
383 0 : bio = BIO_new(BIO_s_mem());
384 0 : if (bio == NULL)
385 : goto err;
386 0 : BIO_set_mem_eof_return(bio, 0);
387 : }
388 : }
389 0 : if (out)
390 0 : BIO_push(out, bio);
391 : else
392 0 : out = bio;
393 : bio = NULL;
394 : if (0) {
395 : err:
396 0 : if (out != NULL)
397 0 : BIO_free_all(out);
398 0 : if (btmp != NULL)
399 0 : BIO_free_all(btmp);
400 0 : out = NULL;
401 : }
402 0 : return (out);
403 : }
404 :
405 0 : static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
406 : {
407 : int ret;
408 0 : ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
409 0 : pcert->cert_info->issuer);
410 0 : if (ret)
411 : return ret;
412 0 : return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
413 : ri->issuer_and_serial->serial);
414 : }
415 :
416 : /* int */
417 0 : 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 0 : 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 0 : unsigned char *ek = NULL, *tkey = NULL;
431 0 : int eklen = 0, tkeylen = 0;
432 :
433 0 : if (p7 == NULL) {
434 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
435 0 : return NULL;
436 : }
437 :
438 0 : if (p7->d.ptr == NULL) {
439 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
440 0 : return NULL;
441 : }
442 :
443 0 : i = OBJ_obj2nid(p7->type);
444 0 : p7->state = PKCS7_S_HEADER;
445 :
446 0 : 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 0 : data_body = PKCS7_get_octet_string(p7->d.sign->contents);
455 0 : if (!PKCS7_is_detached(p7) && data_body == NULL) {
456 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE,
457 : PKCS7_R_INVALID_SIGNED_DATA_TYPE);
458 0 : goto err;
459 : }
460 0 : md_sk = p7->d.sign->md_algs;
461 0 : break;
462 : case NID_pkcs7_signedAndEnveloped:
463 0 : rsk = p7->d.signed_and_enveloped->recipientinfo;
464 0 : md_sk = p7->d.signed_and_enveloped->md_algs;
465 : /* data_body is NULL if the optional EncryptedContent is missing. */
466 0 : data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
467 0 : enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
468 0 : evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
469 0 : if (evp_cipher == NULL) {
470 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE,
471 : PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
472 0 : goto err;
473 : }
474 : break;
475 : case NID_pkcs7_enveloped:
476 0 : rsk = p7->d.enveloped->recipientinfo;
477 0 : enc_alg = p7->d.enveloped->enc_data->algorithm;
478 : /* data_body is NULL if the optional EncryptedContent is missing. */
479 0 : data_body = p7->d.enveloped->enc_data->enc_data;
480 0 : evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
481 0 : if (evp_cipher == NULL) {
482 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE,
483 : PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
484 0 : goto err;
485 : }
486 : break;
487 : default:
488 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
489 0 : goto err;
490 : }
491 :
492 : /* Detached content must be supplied via in_bio instead. */
493 0 : if (data_body == NULL && in_bio == NULL) {
494 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
495 0 : goto err;
496 : }
497 :
498 : /* We will be checking the signature */
499 0 : if (md_sk != NULL) {
500 0 : for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
501 0 : xa = sk_X509_ALGOR_value(md_sk, i);
502 0 : if ((btmp = BIO_new(BIO_f_md())) == NULL) {
503 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
504 0 : goto err;
505 : }
506 :
507 0 : j = OBJ_obj2nid(xa->algorithm);
508 0 : evp_md = EVP_get_digestbynid(j);
509 0 : if (evp_md == NULL) {
510 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE,
511 : PKCS7_R_UNKNOWN_DIGEST_TYPE);
512 0 : goto err;
513 : }
514 :
515 0 : BIO_set_md(btmp, evp_md);
516 0 : if (out == NULL)
517 : out = btmp;
518 : else
519 0 : BIO_push(out, btmp);
520 : btmp = NULL;
521 : }
522 : }
523 :
524 0 : 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 0 : if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
535 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
536 0 : 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 0 : if (pcert) {
550 0 : for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
551 0 : ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
552 0 : if (!pkcs7_cmp_ri(ri, pcert))
553 : break;
554 : ri = NULL;
555 : }
556 0 : if (ri == NULL) {
557 0 : PKCS7err(PKCS7_F_PKCS7_DATADECODE,
558 : PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
559 0 : goto err;
560 : }
561 : }
562 :
563 : /* If we haven't got a certificate try each ri in turn */
564 0 : if (pcert == NULL) {
565 : /*
566 : * Always attempt to decrypt all rinfo even after sucess as a
567 : * defence against MMA timing attacks.
568 : */
569 0 : for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
570 0 : ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
571 :
572 0 : if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
573 : goto err;
574 0 : ERR_clear_error();
575 : }
576 : } else {
577 : /* Only exit on fatal errors, not decrypt failure */
578 0 : if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
579 : goto err;
580 0 : ERR_clear_error();
581 : }
582 :
583 0 : evp_ctx = NULL;
584 0 : BIO_get_cipher_ctx(etmp, &evp_ctx);
585 0 : if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
586 : goto err;
587 0 : if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
588 : goto err;
589 : /* Generate random key as MMA defence */
590 0 : tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
591 0 : tkey = OPENSSL_malloc(tkeylen);
592 0 : if (!tkey)
593 : goto err;
594 0 : if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
595 : goto err;
596 0 : if (ek == NULL) {
597 0 : ek = tkey;
598 0 : eklen = tkeylen;
599 : tkey = NULL;
600 : }
601 :
602 0 : 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 0 : if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
609 : /* Use random key as MMA defence */
610 0 : OPENSSL_cleanse(ek, eklen);
611 0 : OPENSSL_free(ek);
612 0 : ek = tkey;
613 0 : eklen = tkeylen;
614 : tkey = NULL;
615 : }
616 : }
617 : /* Clear errors so we don't leak information useful in MMA */
618 0 : ERR_clear_error();
619 0 : if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
620 : goto err;
621 :
622 0 : if (ek) {
623 0 : OPENSSL_cleanse(ek, eklen);
624 0 : OPENSSL_free(ek);
625 0 : ek = NULL;
626 : }
627 0 : if (tkey) {
628 0 : OPENSSL_cleanse(tkey, tkeylen);
629 0 : OPENSSL_free(tkey);
630 : tkey = NULL;
631 : }
632 :
633 0 : if (out == NULL)
634 : out = etmp;
635 : else
636 0 : BIO_push(out, etmp);
637 : etmp = NULL;
638 : }
639 : #if 1
640 0 : 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 0 : if (data_body->length > 0)
656 0 : bio = BIO_new_mem_buf(data_body->data, data_body->length);
657 : else {
658 0 : bio = BIO_new(BIO_s_mem());
659 0 : BIO_set_mem_eof_return(bio, 0);
660 : }
661 0 : if (bio == NULL)
662 : goto err;
663 : # endif
664 : }
665 0 : BIO_push(out, bio);
666 : bio = NULL;
667 : #endif
668 : if (0) {
669 : err:
670 0 : if (ek) {
671 0 : OPENSSL_cleanse(ek, eklen);
672 0 : OPENSSL_free(ek);
673 : }
674 0 : if (tkey) {
675 0 : OPENSSL_cleanse(tkey, tkeylen);
676 0 : OPENSSL_free(tkey);
677 : }
678 0 : if (out != NULL)
679 0 : BIO_free_all(out);
680 0 : if (btmp != NULL)
681 0 : BIO_free_all(btmp);
682 0 : if (etmp != NULL)
683 0 : BIO_free_all(etmp);
684 0 : if (bio != NULL)
685 0 : BIO_free_all(bio);
686 : out = NULL;
687 : }
688 0 : return (out);
689 : }
690 :
691 0 : static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
692 : {
693 : for (;;) {
694 0 : bio = BIO_find_type(bio, BIO_TYPE_MD);
695 0 : if (bio == NULL) {
696 0 : PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
697 : PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
698 0 : return NULL;
699 : }
700 0 : BIO_get_md_ctx(bio, pmd);
701 0 : if (*pmd == NULL) {
702 0 : PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
703 0 : return NULL;
704 : }
705 0 : if (EVP_MD_CTX_type(*pmd) == nid)
706 : return bio;
707 0 : bio = BIO_next(bio);
708 0 : }
709 : return NULL;
710 : }
711 :
712 0 : static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
713 : {
714 : unsigned char md_data[EVP_MAX_MD_SIZE];
715 : unsigned int md_len;
716 :
717 : /* Add signing time if not already present */
718 0 : if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
719 0 : if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
720 0 : PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
721 0 : return 0;
722 : }
723 : }
724 :
725 : /* Add digest */
726 0 : if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
727 0 : PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
728 0 : return 0;
729 : }
730 0 : if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
731 0 : PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
732 0 : return 0;
733 : }
734 :
735 : /* Now sign the attributes */
736 0 : if (!PKCS7_SIGNER_INFO_sign(si))
737 : return 0;
738 :
739 0 : return 1;
740 : }
741 :
742 0 : int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
743 : {
744 : int ret = 0;
745 : int i, j;
746 : BIO *btmp;
747 : PKCS7_SIGNER_INFO *si;
748 : EVP_MD_CTX *mdc, ctx_tmp;
749 : STACK_OF(X509_ATTRIBUTE) *sk;
750 : STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
751 : ASN1_OCTET_STRING *os = NULL;
752 :
753 0 : if (p7 == NULL) {
754 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
755 0 : return 0;
756 : }
757 :
758 0 : if (p7->d.ptr == NULL) {
759 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
760 0 : return 0;
761 : }
762 :
763 0 : EVP_MD_CTX_init(&ctx_tmp);
764 0 : i = OBJ_obj2nid(p7->type);
765 0 : p7->state = PKCS7_S_HEADER;
766 :
767 0 : switch (i) {
768 : case NID_pkcs7_data:
769 0 : os = p7->d.data;
770 0 : break;
771 : case NID_pkcs7_signedAndEnveloped:
772 : /* XXXXXXXXXXXXXXXX */
773 0 : si_sk = p7->d.signed_and_enveloped->signer_info;
774 0 : os = p7->d.signed_and_enveloped->enc_data->enc_data;
775 0 : if (!os) {
776 0 : os = M_ASN1_OCTET_STRING_new();
777 0 : if (!os) {
778 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
779 0 : goto err;
780 : }
781 0 : p7->d.signed_and_enveloped->enc_data->enc_data = os;
782 : }
783 : break;
784 : case NID_pkcs7_enveloped:
785 : /* XXXXXXXXXXXXXXXX */
786 0 : os = p7->d.enveloped->enc_data->enc_data;
787 0 : if (!os) {
788 0 : os = M_ASN1_OCTET_STRING_new();
789 0 : if (!os) {
790 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
791 0 : goto err;
792 : }
793 0 : p7->d.enveloped->enc_data->enc_data = os;
794 : }
795 : break;
796 : case NID_pkcs7_signed:
797 0 : si_sk = p7->d.sign->signer_info;
798 0 : os = PKCS7_get_octet_string(p7->d.sign->contents);
799 : /* If detached data then the content is excluded */
800 0 : if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
801 0 : M_ASN1_OCTET_STRING_free(os);
802 : os = NULL;
803 0 : p7->d.sign->contents->d.data = NULL;
804 : }
805 : break;
806 :
807 : case NID_pkcs7_digest:
808 0 : os = PKCS7_get_octet_string(p7->d.digest->contents);
809 : /* If detached data then the content is excluded */
810 0 : if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
811 0 : M_ASN1_OCTET_STRING_free(os);
812 : os = NULL;
813 0 : p7->d.digest->contents->d.data = NULL;
814 : }
815 : break;
816 :
817 : default:
818 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
819 0 : goto err;
820 : }
821 :
822 0 : if (si_sk != NULL) {
823 0 : for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
824 0 : si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
825 0 : if (si->pkey == NULL)
826 0 : continue;
827 :
828 0 : j = OBJ_obj2nid(si->digest_alg->algorithm);
829 :
830 : btmp = bio;
831 :
832 0 : btmp = PKCS7_find_digest(&mdc, btmp, j);
833 :
834 0 : if (btmp == NULL)
835 : goto err;
836 :
837 : /*
838 : * We now have the EVP_MD_CTX, lets do the signing.
839 : */
840 0 : if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
841 : goto err;
842 :
843 0 : sk = si->auth_attr;
844 :
845 : /*
846 : * If there are attributes, we add the digest attribute and only
847 : * sign the attributes
848 : */
849 0 : if (sk_X509_ATTRIBUTE_num(sk) > 0) {
850 0 : if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
851 : goto err;
852 : } else {
853 : unsigned char *abuf = NULL;
854 : unsigned int abuflen;
855 0 : abuflen = EVP_PKEY_size(si->pkey);
856 0 : abuf = OPENSSL_malloc(abuflen);
857 0 : if (!abuf)
858 : goto err;
859 :
860 0 : if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
861 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
862 0 : goto err;
863 : }
864 0 : ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
865 : }
866 : }
867 0 : } else if (i == NID_pkcs7_digest) {
868 : unsigned char md_data[EVP_MAX_MD_SIZE];
869 : unsigned int md_len;
870 0 : if (!PKCS7_find_digest(&mdc, bio,
871 0 : OBJ_obj2nid(p7->d.digest->md->algorithm)))
872 : goto err;
873 0 : if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
874 : goto err;
875 0 : M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
876 : }
877 :
878 0 : if (!PKCS7_is_detached(p7)) {
879 : /*
880 : * NOTE(emilia): I think we only reach os == NULL here because detached
881 : * digested data support is broken.
882 : */
883 0 : if (os == NULL)
884 : goto err;
885 0 : if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
886 : char *cont;
887 : long contlen;
888 0 : btmp = BIO_find_type(bio, BIO_TYPE_MEM);
889 0 : if (btmp == NULL) {
890 0 : PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
891 0 : goto err;
892 : }
893 0 : contlen = BIO_get_mem_data(btmp, &cont);
894 : /*
895 : * Mark the BIO read only then we can use its copy of the data
896 : * instead of making an extra copy.
897 : */
898 0 : BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
899 0 : BIO_set_mem_eof_return(btmp, 0);
900 0 : ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
901 : }
902 : }
903 : ret = 1;
904 : err:
905 0 : EVP_MD_CTX_cleanup(&ctx_tmp);
906 0 : return (ret);
907 : }
908 :
909 0 : int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
910 : {
911 : EVP_MD_CTX mctx;
912 : EVP_PKEY_CTX *pctx;
913 0 : unsigned char *abuf = NULL;
914 : int alen;
915 : size_t siglen;
916 : const EVP_MD *md = NULL;
917 :
918 0 : md = EVP_get_digestbyobj(si->digest_alg->algorithm);
919 0 : if (md == NULL)
920 : return 0;
921 :
922 0 : EVP_MD_CTX_init(&mctx);
923 0 : if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
924 : goto err;
925 :
926 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
927 : EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
928 0 : PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
929 0 : goto err;
930 : }
931 :
932 0 : alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
933 : ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
934 0 : if (!abuf)
935 : goto err;
936 0 : if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
937 : goto err;
938 0 : OPENSSL_free(abuf);
939 0 : abuf = NULL;
940 0 : if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
941 : goto err;
942 0 : abuf = OPENSSL_malloc(siglen);
943 0 : if (!abuf)
944 : goto err;
945 0 : if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
946 : goto err;
947 :
948 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
949 : EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
950 0 : PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
951 0 : goto err;
952 : }
953 :
954 0 : EVP_MD_CTX_cleanup(&mctx);
955 :
956 0 : ASN1_STRING_set0(si->enc_digest, abuf, siglen);
957 :
958 0 : return 1;
959 :
960 : err:
961 0 : if (abuf)
962 0 : OPENSSL_free(abuf);
963 0 : EVP_MD_CTX_cleanup(&mctx);
964 0 : return 0;
965 :
966 : }
967 :
968 0 : int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
969 : PKCS7 *p7, PKCS7_SIGNER_INFO *si)
970 : {
971 : PKCS7_ISSUER_AND_SERIAL *ias;
972 : int ret = 0, i;
973 : STACK_OF(X509) *cert;
974 : X509 *x509;
975 :
976 0 : if (p7 == NULL) {
977 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
978 0 : return 0;
979 : }
980 :
981 0 : if (p7->d.ptr == NULL) {
982 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
983 0 : return 0;
984 : }
985 :
986 0 : if (PKCS7_type_is_signed(p7)) {
987 0 : cert = p7->d.sign->cert;
988 0 : } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
989 0 : cert = p7->d.signed_and_enveloped->cert;
990 : } else {
991 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
992 0 : goto err;
993 : }
994 : /* XXXXXXXXXXXXXXXXXXXXXXX */
995 0 : ias = si->issuer_and_serial;
996 :
997 0 : x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
998 :
999 : /* were we able to find the cert in passed to us */
1000 0 : if (x509 == NULL) {
1001 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
1002 : PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
1003 0 : goto err;
1004 : }
1005 :
1006 : /* Lets verify */
1007 0 : if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
1008 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1009 0 : goto err;
1010 : }
1011 0 : X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
1012 0 : i = X509_verify_cert(ctx);
1013 0 : if (i <= 0) {
1014 0 : PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1015 0 : X509_STORE_CTX_cleanup(ctx);
1016 0 : goto err;
1017 : }
1018 0 : X509_STORE_CTX_cleanup(ctx);
1019 :
1020 0 : return PKCS7_signatureVerify(bio, p7, si, x509);
1021 : err:
1022 : return ret;
1023 : }
1024 :
1025 0 : int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
1026 : X509 *x509)
1027 : {
1028 : ASN1_OCTET_STRING *os;
1029 : EVP_MD_CTX mdc_tmp, *mdc;
1030 : int ret = 0, i;
1031 : int md_type;
1032 : STACK_OF(X509_ATTRIBUTE) *sk;
1033 : BIO *btmp;
1034 : EVP_PKEY *pkey;
1035 :
1036 0 : EVP_MD_CTX_init(&mdc_tmp);
1037 :
1038 0 : if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
1039 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
1040 0 : goto err;
1041 : }
1042 :
1043 0 : md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1044 :
1045 : btmp = bio;
1046 : for (;;) {
1047 0 : if ((btmp == NULL) ||
1048 : ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
1049 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1050 : PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1051 0 : goto err;
1052 : }
1053 0 : BIO_get_md_ctx(btmp, &mdc);
1054 0 : if (mdc == NULL) {
1055 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
1056 0 : goto err;
1057 : }
1058 0 : if (EVP_MD_CTX_type(mdc) == md_type)
1059 : break;
1060 : /*
1061 : * Workaround for some broken clients that put the signature OID
1062 : * instead of the digest OID in digest_alg->algorithm
1063 : */
1064 0 : if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1065 : break;
1066 0 : btmp = BIO_next(btmp);
1067 0 : }
1068 :
1069 : /*
1070 : * mdc is the digest ctx that we want, unless there are attributes, in
1071 : * which case the digest is the signed attributes
1072 : */
1073 0 : if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1074 : goto err;
1075 :
1076 0 : sk = si->auth_attr;
1077 0 : if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1078 0 : unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1079 : unsigned int md_len;
1080 : int alen;
1081 : ASN1_OCTET_STRING *message_digest;
1082 :
1083 0 : if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1084 : goto err;
1085 : message_digest = PKCS7_digest_from_attributes(sk);
1086 0 : if (!message_digest) {
1087 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1088 : PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1089 0 : goto err;
1090 : }
1091 0 : if ((message_digest->length != (int)md_len) ||
1092 0 : (memcmp(message_digest->data, md_dat, md_len))) {
1093 : #if 0
1094 : {
1095 : int ii;
1096 : for (ii = 0; ii < message_digest->length; ii++)
1097 : printf("%02X", message_digest->data[ii]);
1098 : printf(" sent\n");
1099 : for (ii = 0; ii < md_len; ii++)
1100 : printf("%02X", md_dat[ii]);
1101 : printf(" calc\n");
1102 : }
1103 : #endif
1104 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1105 : ret = -1;
1106 0 : goto err;
1107 : }
1108 :
1109 0 : if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1110 : goto err;
1111 :
1112 0 : alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1113 : ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1114 0 : if (alen <= 0) {
1115 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1116 : ret = -1;
1117 0 : goto err;
1118 : }
1119 0 : if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1120 : goto err;
1121 :
1122 0 : OPENSSL_free(abuf);
1123 : }
1124 :
1125 0 : os = si->enc_digest;
1126 0 : pkey = X509_get_pubkey(x509);
1127 0 : if (!pkey) {
1128 : ret = -1;
1129 : goto err;
1130 : }
1131 :
1132 0 : i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1133 0 : EVP_PKEY_free(pkey);
1134 0 : if (i <= 0) {
1135 0 : PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1136 : ret = -1;
1137 0 : goto err;
1138 : } else
1139 : ret = 1;
1140 : err:
1141 0 : EVP_MD_CTX_cleanup(&mdc_tmp);
1142 0 : return (ret);
1143 : }
1144 :
1145 0 : PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1146 : {
1147 : STACK_OF(PKCS7_RECIP_INFO) *rsk;
1148 : PKCS7_RECIP_INFO *ri;
1149 : int i;
1150 :
1151 0 : i = OBJ_obj2nid(p7->type);
1152 0 : if (i != NID_pkcs7_signedAndEnveloped)
1153 : return NULL;
1154 0 : if (p7->d.signed_and_enveloped == NULL)
1155 : return NULL;
1156 0 : rsk = p7->d.signed_and_enveloped->recipientinfo;
1157 0 : if (rsk == NULL)
1158 : return NULL;
1159 0 : ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1160 0 : if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1161 : return (NULL);
1162 0 : ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1163 0 : return (ri->issuer_and_serial);
1164 : }
1165 :
1166 0 : ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1167 : {
1168 0 : return (get_attribute(si->auth_attr, nid));
1169 : }
1170 :
1171 0 : ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1172 : {
1173 0 : return (get_attribute(si->unauth_attr, nid));
1174 : }
1175 :
1176 0 : static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1177 : {
1178 : int i;
1179 : X509_ATTRIBUTE *xa;
1180 : ASN1_OBJECT *o;
1181 :
1182 0 : o = OBJ_nid2obj(nid);
1183 0 : if (!o || !sk)
1184 : return (NULL);
1185 0 : for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1186 0 : xa = sk_X509_ATTRIBUTE_value(sk, i);
1187 0 : if (OBJ_cmp(xa->object, o) == 0) {
1188 0 : if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1189 0 : return (sk_ASN1_TYPE_value(xa->value.set, 0));
1190 : else
1191 : return (NULL);
1192 : }
1193 : }
1194 : return (NULL);
1195 : }
1196 :
1197 0 : ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1198 : {
1199 : ASN1_TYPE *astype;
1200 0 : if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1201 : return NULL;
1202 0 : return astype->value.octet_string;
1203 : }
1204 :
1205 0 : int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1206 : STACK_OF(X509_ATTRIBUTE) *sk)
1207 : {
1208 : int i;
1209 :
1210 0 : if (p7si->auth_attr != NULL)
1211 0 : sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1212 0 : p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1213 0 : if (p7si->auth_attr == NULL)
1214 : return 0;
1215 0 : for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1216 0 : if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1217 : X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1218 : (sk, i))))
1219 : == NULL)
1220 : return (0);
1221 : }
1222 : return (1);
1223 : }
1224 :
1225 0 : int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1226 : STACK_OF(X509_ATTRIBUTE) *sk)
1227 : {
1228 : int i;
1229 :
1230 0 : if (p7si->unauth_attr != NULL)
1231 0 : sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1232 0 : p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1233 0 : if (p7si->unauth_attr == NULL)
1234 : return 0;
1235 0 : for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1236 0 : if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1237 : X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1238 : (sk, i))))
1239 : == NULL)
1240 : return (0);
1241 : }
1242 : return (1);
1243 : }
1244 :
1245 0 : int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1246 : void *value)
1247 : {
1248 0 : return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1249 : }
1250 :
1251 0 : int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1252 : void *value)
1253 : {
1254 0 : return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1255 : }
1256 :
1257 0 : static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1258 : void *value)
1259 : {
1260 : X509_ATTRIBUTE *attr = NULL;
1261 :
1262 0 : if (*sk == NULL) {
1263 0 : *sk = sk_X509_ATTRIBUTE_new_null();
1264 0 : if (*sk == NULL)
1265 : return 0;
1266 : new_attrib:
1267 0 : if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1268 : return 0;
1269 0 : if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1270 0 : X509_ATTRIBUTE_free(attr);
1271 0 : return 0;
1272 : }
1273 : } else {
1274 : int i;
1275 :
1276 0 : for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1277 0 : attr = sk_X509_ATTRIBUTE_value(*sk, i);
1278 0 : if (OBJ_obj2nid(attr->object) == nid) {
1279 0 : X509_ATTRIBUTE_free(attr);
1280 0 : attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1281 0 : if (attr == NULL)
1282 : return 0;
1283 0 : if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1284 0 : X509_ATTRIBUTE_free(attr);
1285 0 : return 0;
1286 : }
1287 : goto end;
1288 : }
1289 : }
1290 : goto new_attrib;
1291 : }
1292 : end:
1293 : return (1);
1294 : }
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