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d02b48c6 | 1 | /* crypto/pkcs7/pk7_doit.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
40720ce3 | 8 | * |
d02b48c6 RE |
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). | |
40720ce3 | 15 | * |
d02b48c6 RE |
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. | |
40720ce3 | 22 | * |
d02b48c6 RE |
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 :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
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. | |
40720ce3 | 52 | * |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/rand.h> |
62 | #include <openssl/objects.h> | |
63 | #include <openssl/x509.h> | |
5a9a4b29 | 64 | #include <openssl/x509v3.h> |
1682e8fb | 65 | #include <openssl/err.h> |
d02b48c6 | 66 | |
b6436ff2 | 67 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
40720ce3 | 68 | void *value); |
b6436ff2 | 69 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
dfeab068 | 70 | |
40720ce3 MC |
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 | } | |
67fec850 | 93 | |
caf044cb | 94 | static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7) |
40720ce3 MC |
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 | } | |
67fec850 | 103 | |
c5a55463 | 104 | static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg) |
40720ce3 MC |
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 | } | |
c5a55463 | 136 | |
6b691a5c | 137 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
40720ce3 MC |
138 | { |
139 | int i; | |
140 | BIO *out = NULL, *btmp = NULL; | |
141 | X509_ALGOR *xa = NULL; | |
142 | const EVP_CIPHER *evp_cipher = NULL; | |
143 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
144 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
145 | X509_ALGOR *xalg = NULL; | |
146 | PKCS7_RECIP_INFO *ri = NULL; | |
147 | EVP_PKEY *pkey; | |
148 | ASN1_OCTET_STRING *os = NULL; | |
149 | ||
544e3e3b EK |
150 | if (p7 == NULL) { |
151 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
152 | return NULL; | |
153 | } | |
154 | /* | |
155 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
156 | * only applies to inner content (precisely, detached signatures). | |
157 | * | |
158 | * When reading content, missing outer content is therefore treated as an | |
159 | * error. | |
160 | * | |
161 | * When creating content, PKCS7_content_new() must be called before | |
162 | * calling this method, so a NULL p7->d is always an error. | |
163 | */ | |
164 | if (p7->d.ptr == NULL) { | |
165 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
166 | return NULL; | |
167 | } | |
168 | ||
40720ce3 MC |
169 | i = OBJ_obj2nid(p7->type); |
170 | p7->state = PKCS7_S_HEADER; | |
171 | ||
172 | switch (i) { | |
173 | case NID_pkcs7_signed: | |
174 | md_sk = p7->d.sign->md_algs; | |
175 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
176 | break; | |
177 | case NID_pkcs7_signedAndEnveloped: | |
178 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
179 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
180 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
181 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
182 | if (evp_cipher == NULL) { | |
183 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
184 | goto err; | |
185 | } | |
186 | break; | |
187 | case NID_pkcs7_enveloped: | |
188 | rsk = p7->d.enveloped->recipientinfo; | |
189 | xalg = p7->d.enveloped->enc_data->algorithm; | |
190 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
191 | if (evp_cipher == NULL) { | |
192 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
193 | goto err; | |
194 | } | |
195 | break; | |
196 | case NID_pkcs7_digest: | |
197 | xa = p7->d.digest->md; | |
198 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
199 | break; | |
200 | default: | |
201 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
202 | goto err; | |
203 | } | |
204 | ||
205 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
206 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
207 | goto err; | |
208 | ||
209 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
210 | goto err; | |
211 | ||
212 | if (evp_cipher != NULL) { | |
213 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
214 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
215 | int keylen, ivlen; | |
216 | int jj, max; | |
217 | unsigned char *tmp; | |
218 | EVP_CIPHER_CTX *ctx; | |
219 | ||
220 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
221 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
222 | goto err; | |
223 | } | |
224 | BIO_get_cipher_ctx(btmp, &ctx); | |
225 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
226 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
227 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
228 | if (ivlen > 0) | |
229 | if (RAND_pseudo_bytes(iv, ivlen) <= 0) | |
230 | goto err; | |
231 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
232 | goto err; | |
233 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
234 | goto err; | |
235 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
236 | goto err; | |
237 | ||
238 | if (ivlen > 0) { | |
239 | if (xalg->parameter == NULL) { | |
240 | xalg->parameter = ASN1_TYPE_new(); | |
241 | if (xalg->parameter == NULL) | |
242 | goto err; | |
243 | } | |
244 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
245 | goto err; | |
246 | } | |
247 | ||
248 | /* Lets do the pub key stuff :-) */ | |
249 | max = 0; | |
250 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
251 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
252 | if (ri->cert == NULL) { | |
253 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, | |
254 | PKCS7_R_MISSING_CERIPEND_INFO); | |
255 | goto err; | |
256 | } | |
257 | if ((pkey = X509_get_pubkey(ri->cert)) == NULL) | |
258 | goto err; | |
259 | jj = EVP_PKEY_size(pkey); | |
260 | EVP_PKEY_free(pkey); | |
261 | if (max < jj) | |
262 | max = jj; | |
263 | } | |
264 | if ((tmp = (unsigned char *)OPENSSL_malloc(max)) == NULL) { | |
265 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_MALLOC_FAILURE); | |
266 | goto err; | |
267 | } | |
268 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
269 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
270 | if ((pkey = X509_get_pubkey(ri->cert)) == NULL) | |
271 | goto err; | |
272 | jj = EVP_PKEY_encrypt(tmp, key, keylen, pkey); | |
273 | EVP_PKEY_free(pkey); | |
274 | if (jj <= 0) { | |
275 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_EVP_LIB); | |
276 | OPENSSL_free(tmp); | |
277 | goto err; | |
278 | } | |
279 | if (!M_ASN1_OCTET_STRING_set(ri->enc_key, tmp, jj)) { | |
280 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_MALLOC_FAILURE); | |
281 | OPENSSL_free(tmp); | |
282 | goto err; | |
283 | } | |
284 | } | |
285 | OPENSSL_free(tmp); | |
286 | OPENSSL_cleanse(key, keylen); | |
287 | ||
288 | if (out == NULL) | |
289 | out = btmp; | |
290 | else | |
291 | BIO_push(out, btmp); | |
292 | btmp = NULL; | |
293 | } | |
294 | ||
295 | if (bio == NULL) { | |
296 | if (PKCS7_is_detached(p7)) | |
297 | bio = BIO_new(BIO_s_null()); | |
298 | else if (os && os->length > 0) | |
299 | bio = BIO_new_mem_buf(os->data, os->length); | |
300 | if (bio == NULL) { | |
301 | bio = BIO_new(BIO_s_mem()); | |
302 | if (bio == NULL) | |
303 | goto err; | |
304 | BIO_set_mem_eof_return(bio, 0); | |
305 | } | |
306 | } | |
307 | BIO_push(out, bio); | |
308 | bio = NULL; | |
309 | if (0) { | |
310 | err: | |
311 | if (out != NULL) | |
312 | BIO_free_all(out); | |
313 | if (btmp != NULL) | |
314 | BIO_free_all(btmp); | |
315 | out = NULL; | |
316 | } | |
317 | return (out); | |
318 | } | |
dfeab068 | 319 | |
1682e8fb | 320 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
40720ce3 MC |
321 | { |
322 | int ret; | |
323 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
324 | pcert->cert_info->issuer); | |
325 | if (ret) | |
326 | return ret; | |
327 | return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, | |
328 | ri->issuer_and_serial->serial); | |
329 | } | |
1682e8fb | 330 | |
dfeab068 | 331 | /* int */ |
84fa704c | 332 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
40720ce3 MC |
333 | { |
334 | int i, j; | |
335 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
336 | unsigned char *tmp = NULL; | |
337 | X509_ALGOR *xa; | |
338 | ASN1_OCTET_STRING *data_body = NULL; | |
339 | const EVP_MD *evp_md; | |
340 | const EVP_CIPHER *evp_cipher = NULL; | |
341 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
342 | X509_ALGOR *enc_alg = NULL; | |
343 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
344 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
345 | PKCS7_RECIP_INFO *ri = NULL; | |
346 | ||
544e3e3b EK |
347 | if (p7 == NULL) { |
348 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | if (p7->d.ptr == NULL) { | |
353 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
354 | return NULL; | |
355 | } | |
356 | ||
40720ce3 MC |
357 | i = OBJ_obj2nid(p7->type); |
358 | p7->state = PKCS7_S_HEADER; | |
359 | ||
360 | switch (i) { | |
361 | case NID_pkcs7_signed: | |
362 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); | |
363 | md_sk = p7->d.sign->md_algs; | |
364 | break; | |
365 | case NID_pkcs7_signedAndEnveloped: | |
366 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
367 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
368 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; | |
369 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
370 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
371 | if (evp_cipher == NULL) { | |
372 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
373 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
374 | goto err; | |
375 | } | |
376 | break; | |
377 | case NID_pkcs7_enveloped: | |
378 | rsk = p7->d.enveloped->recipientinfo; | |
379 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
380 | data_body = p7->d.enveloped->enc_data->enc_data; | |
381 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
382 | if (evp_cipher == NULL) { | |
383 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
384 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
385 | goto err; | |
386 | } | |
387 | break; | |
388 | default: | |
389 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
390 | goto err; | |
391 | } | |
392 | ||
393 | /* We will be checking the signature */ | |
394 | if (md_sk != NULL) { | |
395 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
396 | xa = sk_X509_ALGOR_value(md_sk, i); | |
397 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
398 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
399 | goto err; | |
400 | } | |
401 | ||
402 | j = OBJ_obj2nid(xa->algorithm); | |
403 | evp_md = EVP_get_digestbynid(j); | |
404 | if (evp_md == NULL) { | |
405 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
406 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
407 | goto err; | |
408 | } | |
409 | ||
410 | BIO_set_md(btmp, evp_md); | |
411 | if (out == NULL) | |
412 | out = btmp; | |
413 | else | |
414 | BIO_push(out, btmp); | |
415 | btmp = NULL; | |
416 | } | |
417 | } | |
418 | ||
419 | if (evp_cipher != NULL) { | |
dfeab068 | 420 | #if 0 |
40720ce3 MC |
421 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
422 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
423 | unsigned char *p; | |
424 | int keylen, ivlen; | |
425 | int max; | |
426 | X509_OBJECT ret; | |
dfeab068 | 427 | #endif |
40720ce3 MC |
428 | unsigned char *tkey = NULL; |
429 | int tkeylen; | |
430 | int jj; | |
431 | ||
432 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { | |
433 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
434 | goto err; | |
435 | } | |
436 | ||
437 | /* | |
438 | * It was encrypted, we need to decrypt the secret key with the | |
439 | * private key | |
440 | */ | |
441 | ||
442 | /* | |
443 | * Find the recipientInfo which matches the passed certificate (if | |
444 | * any) | |
445 | */ | |
446 | ||
447 | if (pcert) { | |
448 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
449 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
450 | if (!pkcs7_cmp_ri(ri, pcert)) | |
451 | break; | |
452 | ri = NULL; | |
453 | } | |
454 | if (ri == NULL) { | |
455 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
456 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
457 | goto err; | |
458 | } | |
459 | } | |
460 | ||
461 | jj = EVP_PKEY_size(pkey); | |
462 | tmp = (unsigned char *)OPENSSL_malloc(jj + 10); | |
463 | if (tmp == NULL) { | |
464 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_MALLOC_FAILURE); | |
465 | goto err; | |
466 | } | |
467 | ||
468 | /* If we haven't got a certificate try each ri in turn */ | |
469 | ||
470 | if (pcert == NULL) { | |
471 | /* | |
472 | * Temporary storage in case EVP_PKEY_decrypt overwrites output | |
473 | * buffer on error. | |
474 | */ | |
475 | unsigned char *tmp2; | |
476 | tmp2 = OPENSSL_malloc(jj); | |
477 | if (!tmp2) | |
478 | goto err; | |
479 | jj = -1; | |
480 | /* | |
481 | * Always attempt to decrypt all cases to avoid leaking timing | |
482 | * information about a successful decrypt. | |
483 | */ | |
484 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
485 | int tret; | |
486 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
487 | tret = EVP_PKEY_decrypt(tmp2, | |
488 | M_ASN1_STRING_data(ri->enc_key), | |
489 | M_ASN1_STRING_length(ri->enc_key), | |
490 | pkey); | |
491 | if (tret > 0) { | |
492 | memcpy(tmp, tmp2, tret); | |
493 | OPENSSL_cleanse(tmp2, tret); | |
494 | jj = tret; | |
495 | } | |
496 | ERR_clear_error(); | |
497 | } | |
498 | OPENSSL_free(tmp2); | |
499 | } else { | |
500 | jj = EVP_PKEY_decrypt(tmp, | |
501 | M_ASN1_STRING_data(ri->enc_key), | |
502 | M_ASN1_STRING_length(ri->enc_key), pkey); | |
503 | ERR_clear_error(); | |
504 | } | |
505 | ||
506 | evp_ctx = NULL; | |
507 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
508 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
509 | goto err; | |
510 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
511 | goto err; | |
512 | /* Generate random key to counter MMA */ | |
513 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
514 | tkey = OPENSSL_malloc(tkeylen); | |
515 | if (!tkey) | |
516 | goto err; | |
517 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
518 | goto err; | |
519 | /* If we have no key use random key */ | |
520 | if (jj <= 0) { | |
521 | OPENSSL_free(tmp); | |
522 | jj = tkeylen; | |
523 | tmp = tkey; | |
524 | tkey = NULL; | |
525 | } | |
526 | ||
527 | if (jj != tkeylen) { | |
528 | /* | |
529 | * Some S/MIME clients don't use the same key and effective key | |
530 | * length. The key length is determined by the size of the | |
531 | * decrypted RSA key. | |
532 | */ | |
533 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj)) { | |
534 | /* As MMA defence use random key instead */ | |
535 | OPENSSL_cleanse(tmp, jj); | |
536 | OPENSSL_free(tmp); | |
537 | jj = tkeylen; | |
538 | tmp = tkey; | |
539 | tkey = NULL; | |
540 | } | |
541 | } | |
542 | ERR_clear_error(); | |
543 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, tmp, NULL, 0) <= 0) | |
544 | goto err; | |
545 | ||
546 | OPENSSL_cleanse(tmp, jj); | |
547 | ||
548 | if (tkey) { | |
549 | OPENSSL_cleanse(tkey, tkeylen); | |
550 | OPENSSL_free(tkey); | |
551 | } | |
552 | ||
553 | if (out == NULL) | |
554 | out = etmp; | |
555 | else | |
556 | BIO_push(out, etmp); | |
557 | etmp = NULL; | |
558 | } | |
dfeab068 | 559 | #if 1 |
40720ce3 MC |
560 | if (PKCS7_is_detached(p7) || (in_bio != NULL)) { |
561 | bio = in_bio; | |
562 | } else { | |
563 | # if 0 | |
564 | bio = BIO_new(BIO_s_mem()); | |
565 | /* | |
566 | * We need to set this so that when we have read all the data, the | |
567 | * encrypt BIO, if present, will read EOF and encode the last few | |
568 | * bytes | |
569 | */ | |
570 | BIO_set_mem_eof_return(bio, 0); | |
571 | ||
572 | if (data_body->length > 0) | |
573 | BIO_write(bio, (char *)data_body->data, data_body->length); | |
574 | # else | |
575 | if (data_body->length > 0) | |
576 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
577 | else { | |
578 | bio = BIO_new(BIO_s_mem()); | |
579 | BIO_set_mem_eof_return(bio, 0); | |
580 | } | |
581 | if (bio == NULL) | |
582 | goto err; | |
583 | # endif | |
584 | } | |
585 | BIO_push(out, bio); | |
586 | bio = NULL; | |
dfeab068 | 587 | #endif |
40720ce3 MC |
588 | if (0) { |
589 | err: | |
590 | if (out != NULL) | |
591 | BIO_free_all(out); | |
592 | if (btmp != NULL) | |
593 | BIO_free_all(btmp); | |
594 | if (etmp != NULL) | |
595 | BIO_free_all(etmp); | |
596 | if (bio != NULL) | |
597 | BIO_free_all(bio); | |
598 | out = NULL; | |
599 | } | |
600 | if (tmp != NULL) | |
601 | OPENSSL_free(tmp); | |
602 | return (out); | |
603 | } | |
d02b48c6 | 604 | |
c5a55463 | 605 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
40720ce3 MC |
606 | { |
607 | for (;;) { | |
608 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
609 | if (bio == NULL) { | |
610 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
611 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
612 | return NULL; | |
613 | } | |
614 | BIO_get_md_ctx(bio, pmd); | |
615 | if (*pmd == NULL) { | |
616 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
617 | return NULL; | |
618 | } | |
619 | if (EVP_MD_CTX_type(*pmd) == nid) | |
620 | return bio; | |
621 | bio = BIO_next(bio); | |
622 | } | |
623 | return NULL; | |
624 | } | |
c5a55463 | 625 | |
6b691a5c | 626 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
40720ce3 MC |
627 | { |
628 | int ret = 0; | |
629 | int i, j; | |
630 | BIO *btmp; | |
631 | BUF_MEM *buf_mem = NULL; | |
632 | BUF_MEM *buf = NULL; | |
633 | PKCS7_SIGNER_INFO *si; | |
634 | EVP_MD_CTX *mdc, ctx_tmp; | |
635 | STACK_OF(X509_ATTRIBUTE) *sk; | |
636 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
637 | ASN1_OCTET_STRING *os = NULL; | |
638 | ||
544e3e3b EK |
639 | if (p7 == NULL) { |
640 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | if (p7->d.ptr == NULL) { | |
645 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
646 | return 0; | |
647 | } | |
648 | ||
40720ce3 MC |
649 | EVP_MD_CTX_init(&ctx_tmp); |
650 | i = OBJ_obj2nid(p7->type); | |
651 | p7->state = PKCS7_S_HEADER; | |
652 | ||
653 | switch (i) { | |
654 | case NID_pkcs7_signedAndEnveloped: | |
655 | /* XXXXXXXXXXXXXXXX */ | |
656 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
657 | if (!(os = M_ASN1_OCTET_STRING_new())) { | |
658 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
659 | goto err; | |
660 | } | |
661 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
662 | break; | |
663 | case NID_pkcs7_enveloped: | |
664 | /* XXXXXXXXXXXXXXXX */ | |
665 | if (!(os = M_ASN1_OCTET_STRING_new())) { | |
666 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
667 | goto err; | |
668 | } | |
669 | p7->d.enveloped->enc_data->enc_data = os; | |
670 | break; | |
671 | case NID_pkcs7_signed: | |
672 | si_sk = p7->d.sign->signer_info; | |
673 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
674 | /* If detached data then the content is excluded */ | |
675 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
676 | M_ASN1_OCTET_STRING_free(os); | |
544e3e3b | 677 | os = NULL; |
40720ce3 MC |
678 | p7->d.sign->contents->d.data = NULL; |
679 | } | |
680 | break; | |
681 | ||
682 | case NID_pkcs7_digest: | |
683 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
684 | /* If detached data then the content is excluded */ | |
685 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
686 | M_ASN1_OCTET_STRING_free(os); | |
544e3e3b | 687 | os = NULL; |
40720ce3 MC |
688 | p7->d.digest->contents->d.data = NULL; |
689 | } | |
690 | break; | |
691 | ||
692 | } | |
693 | ||
694 | if (si_sk != NULL) { | |
695 | if ((buf = BUF_MEM_new()) == NULL) { | |
696 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_BIO_LIB); | |
697 | goto err; | |
698 | } | |
699 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
700 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
701 | if (si->pkey == NULL) | |
702 | continue; | |
703 | ||
704 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
705 | ||
706 | btmp = bio; | |
707 | ||
708 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
709 | ||
710 | if (btmp == NULL) | |
711 | goto err; | |
712 | ||
713 | /* | |
714 | * We now have the EVP_MD_CTX, lets do the signing. | |
715 | */ | |
716 | EVP_MD_CTX_copy_ex(&ctx_tmp, mdc); | |
717 | if (!BUF_MEM_grow_clean(buf, EVP_PKEY_size(si->pkey))) { | |
718 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_BIO_LIB); | |
719 | goto err; | |
720 | } | |
721 | ||
722 | sk = si->auth_attr; | |
723 | ||
724 | /* | |
725 | * If there are attributes, we add the digest attribute and only | |
726 | * sign the attributes | |
727 | */ | |
728 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
729 | unsigned char md_data[EVP_MAX_MD_SIZE], *abuf = NULL; | |
730 | unsigned int md_len, alen; | |
731 | ASN1_OCTET_STRING *digest; | |
732 | ASN1_UTCTIME *sign_time; | |
733 | const EVP_MD *md_tmp; | |
734 | ||
735 | /* Add signing time if not already present */ | |
736 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
737 | if (!(sign_time = X509_gmtime_adj(NULL, 0))) { | |
738 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, | |
739 | ERR_R_MALLOC_FAILURE); | |
740 | goto err; | |
741 | } | |
742 | if (!PKCS7_add_signed_attribute(si, | |
743 | NID_pkcs9_signingTime, | |
744 | V_ASN1_UTCTIME, | |
745 | sign_time)) { | |
746 | M_ASN1_UTCTIME_free(sign_time); | |
747 | goto err; | |
748 | } | |
749 | } | |
750 | ||
751 | /* Add digest */ | |
752 | md_tmp = EVP_MD_CTX_md(&ctx_tmp); | |
753 | EVP_DigestFinal_ex(&ctx_tmp, md_data, &md_len); | |
754 | if (!(digest = M_ASN1_OCTET_STRING_new())) { | |
755 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
756 | goto err; | |
757 | } | |
758 | if (!M_ASN1_OCTET_STRING_set(digest, md_data, md_len)) { | |
759 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
760 | M_ASN1_OCTET_STRING_free(digest); | |
761 | goto err; | |
762 | } | |
763 | if (!PKCS7_add_signed_attribute(si, | |
764 | NID_pkcs9_messageDigest, | |
765 | V_ASN1_OCTET_STRING, digest)) | |
766 | { | |
767 | M_ASN1_OCTET_STRING_free(digest); | |
768 | goto err; | |
769 | } | |
770 | ||
771 | /* Now sign the attributes */ | |
772 | EVP_SignInit_ex(&ctx_tmp, md_tmp, NULL); | |
773 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
774 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
775 | if (!abuf) | |
776 | goto err; | |
777 | EVP_SignUpdate(&ctx_tmp, abuf, alen); | |
778 | OPENSSL_free(abuf); | |
779 | } | |
271da5a2 | 780 | #ifndef OPENSSL_NO_DSA |
40720ce3 MC |
781 | if (si->pkey->type == EVP_PKEY_DSA) |
782 | ctx_tmp.digest = EVP_dss1(); | |
271da5a2 | 783 | #endif |
4d94ae00 | 784 | #ifndef OPENSSL_NO_ECDSA |
40720ce3 MC |
785 | if (si->pkey->type == EVP_PKEY_EC) |
786 | ctx_tmp.digest = EVP_ecdsa(); | |
4d94ae00 | 787 | #endif |
dfeab068 | 788 | |
40720ce3 MC |
789 | if (!EVP_SignFinal(&ctx_tmp, (unsigned char *)buf->data, |
790 | (unsigned int *)&buf->length, si->pkey)) { | |
791 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); | |
792 | goto err; | |
793 | } | |
794 | if (!ASN1_STRING_set(si->enc_digest, | |
795 | (unsigned char *)buf->data, buf->length)) { | |
796 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_ASN1_LIB); | |
797 | goto err; | |
798 | } | |
799 | } | |
800 | } else if (i == NID_pkcs7_digest) { | |
801 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
802 | unsigned int md_len; | |
803 | if (!PKCS7_find_digest(&mdc, bio, | |
804 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
805 | goto err; | |
806 | EVP_DigestFinal_ex(mdc, md_data, &md_len); | |
807 | M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); | |
808 | } | |
809 | ||
810 | if (!PKCS7_is_detached(p7)) { | |
544e3e3b EK |
811 | /* |
812 | * NOTE(emilia): I think we only reach os == NULL here because detached | |
813 | * digested data support is broken. | |
814 | */ | |
815 | if (os == NULL) | |
816 | goto err; | |
40720ce3 MC |
817 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); |
818 | if (btmp == NULL) { | |
819 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
820 | goto err; | |
821 | } | |
822 | BIO_get_mem_ptr(btmp, &buf_mem); | |
823 | /* | |
824 | * Mark the BIO read only then we can use its copy of the data | |
825 | * instead of making an extra copy. | |
826 | */ | |
827 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
828 | BIO_set_mem_eof_return(btmp, 0); | |
829 | os->data = (unsigned char *)buf_mem->data; | |
830 | os->length = buf_mem->length; | |
8484721a | 831 | #if 0 |
40720ce3 MC |
832 | M_ASN1_OCTET_STRING_set(os, |
833 | (unsigned char *)buf_mem->data, | |
834 | buf_mem->length); | |
8484721a | 835 | #endif |
40720ce3 MC |
836 | } |
837 | ret = 1; | |
838 | err: | |
839 | EVP_MD_CTX_cleanup(&ctx_tmp); | |
840 | if (buf != NULL) | |
841 | BUF_MEM_free(buf); | |
842 | return (ret); | |
843 | } | |
d02b48c6 | 844 | |
6b691a5c | 845 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
40720ce3 MC |
846 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
847 | { | |
848 | PKCS7_ISSUER_AND_SERIAL *ias; | |
849 | int ret = 0, i; | |
850 | STACK_OF(X509) *cert; | |
851 | X509 *x509; | |
852 | ||
544e3e3b EK |
853 | if (p7 == NULL) { |
854 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | if (p7->d.ptr == NULL) { | |
859 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
860 | return 0; | |
861 | } | |
862 | ||
40720ce3 MC |
863 | if (PKCS7_type_is_signed(p7)) { |
864 | cert = p7->d.sign->cert; | |
865 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
866 | cert = p7->d.signed_and_enveloped->cert; | |
867 | } else { | |
868 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
869 | goto err; | |
870 | } | |
871 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
872 | ias = si->issuer_and_serial; | |
873 | ||
874 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
875 | ||
876 | /* were we able to find the cert in passed to us */ | |
877 | if (x509 == NULL) { | |
878 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
879 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
880 | goto err; | |
881 | } | |
882 | ||
883 | /* Lets verify */ | |
884 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
885 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
886 | goto err; | |
887 | } | |
888 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
889 | i = X509_verify_cert(ctx); | |
890 | if (i <= 0) { | |
891 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
892 | X509_STORE_CTX_cleanup(ctx); | |
893 | goto err; | |
894 | } | |
895 | X509_STORE_CTX_cleanup(ctx); | |
896 | ||
897 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
898 | err: | |
899 | return ret; | |
900 | } | |
170afce5 DSH |
901 | |
902 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
40720ce3 | 903 | X509 *x509) |
dfeab068 | 904 | { |
40720ce3 MC |
905 | ASN1_OCTET_STRING *os; |
906 | EVP_MD_CTX mdc_tmp, *mdc; | |
907 | int ret = 0, i; | |
908 | int md_type; | |
909 | STACK_OF(X509_ATTRIBUTE) *sk; | |
910 | BIO *btmp; | |
911 | EVP_PKEY *pkey; | |
912 | ||
913 | EVP_MD_CTX_init(&mdc_tmp); | |
914 | ||
915 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
916 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
917 | goto err; | |
918 | } | |
919 | ||
920 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
921 | ||
922 | btmp = bio; | |
923 | for (;;) { | |
924 | if ((btmp == NULL) || | |
925 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
926 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
927 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
928 | goto err; | |
929 | } | |
930 | BIO_get_md_ctx(btmp, &mdc); | |
931 | if (mdc == NULL) { | |
932 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
933 | goto err; | |
934 | } | |
935 | if (EVP_MD_CTX_type(mdc) == md_type) | |
936 | break; | |
937 | /* | |
938 | * Workaround for some broken clients that put the signature OID | |
939 | * instead of the digest OID in digest_alg->algorithm | |
940 | */ | |
941 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
942 | break; | |
943 | btmp = BIO_next(btmp); | |
944 | } | |
945 | ||
946 | /* | |
947 | * mdc is the digest ctx that we want, unless there are attributes, in | |
948 | * which case the digest is the signed attributes | |
949 | */ | |
950 | EVP_MD_CTX_copy_ex(&mdc_tmp, mdc); | |
951 | ||
952 | sk = si->auth_attr; | |
953 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
954 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
955 | unsigned int md_len, alen; | |
956 | ASN1_OCTET_STRING *message_digest; | |
957 | ||
958 | EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len); | |
959 | message_digest = PKCS7_digest_from_attributes(sk); | |
960 | if (!message_digest) { | |
961 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
962 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
963 | goto err; | |
964 | } | |
965 | if ((message_digest->length != (int)md_len) || | |
966 | (memcmp(message_digest->data, md_dat, md_len))) { | |
967 | #if 0 | |
968 | { | |
969 | int ii; | |
970 | for (ii = 0; ii < message_digest->length; ii++) | |
971 | printf("%02X", message_digest->data[ii]); | |
972 | printf(" sent\n"); | |
973 | for (ii = 0; ii < md_len; ii++) | |
974 | printf("%02X", md_dat[ii]); | |
975 | printf(" calc\n"); | |
976 | } | |
dfeab068 | 977 | #endif |
40720ce3 MC |
978 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
979 | ret = -1; | |
980 | goto err; | |
981 | } | |
982 | ||
983 | EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL); | |
984 | ||
985 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
986 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
987 | EVP_VerifyUpdate(&mdc_tmp, abuf, alen); | |
988 | ||
989 | OPENSSL_free(abuf); | |
990 | } | |
991 | ||
992 | os = si->enc_digest; | |
993 | pkey = X509_get_pubkey(x509); | |
994 | if (!pkey) { | |
995 | ret = -1; | |
996 | goto err; | |
997 | } | |
271da5a2 | 998 | #ifndef OPENSSL_NO_DSA |
40720ce3 MC |
999 | if (pkey->type == EVP_PKEY_DSA) |
1000 | mdc_tmp.digest = EVP_dss1(); | |
271da5a2 | 1001 | #endif |
4d94ae00 | 1002 | #ifndef OPENSSL_NO_ECDSA |
40720ce3 MC |
1003 | if (pkey->type == EVP_PKEY_EC) |
1004 | mdc_tmp.digest = EVP_ecdsa(); | |
4d94ae00 | 1005 | #endif |
dfeab068 | 1006 | |
40720ce3 MC |
1007 | i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey); |
1008 | EVP_PKEY_free(pkey); | |
1009 | if (i <= 0) { | |
1010 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1011 | ret = -1; | |
1012 | goto err; | |
1013 | } else | |
1014 | ret = 1; | |
1015 | err: | |
1016 | EVP_MD_CTX_cleanup(&mdc_tmp); | |
1017 | return (ret); | |
1018 | } | |
d02b48c6 | 1019 | |
6b691a5c | 1020 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
40720ce3 MC |
1021 | { |
1022 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1023 | PKCS7_RECIP_INFO *ri; | |
1024 | int i; | |
1025 | ||
1026 | i = OBJ_obj2nid(p7->type); | |
1027 | if (i != NID_pkcs7_signedAndEnveloped) | |
1028 | return NULL; | |
1029 | if (p7->d.signed_and_enveloped == NULL) | |
1030 | return NULL; | |
1031 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1032 | if (rsk == NULL) | |
1033 | return NULL; | |
1034 | ri = sk_PKCS7_RECIP_INFO_value(rsk, 0); | |
1035 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) | |
1036 | return (NULL); | |
1037 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1038 | return (ri->issuer_and_serial); | |
1039 | } | |
dfeab068 | 1040 | |
6b691a5c | 1041 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
40720ce3 MC |
1042 | { |
1043 | return (get_attribute(si->auth_attr, nid)); | |
1044 | } | |
dfeab068 | 1045 | |
6b691a5c | 1046 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
40720ce3 MC |
1047 | { |
1048 | return (get_attribute(si->unauth_attr, nid)); | |
1049 | } | |
dfeab068 | 1050 | |
b6436ff2 | 1051 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
40720ce3 MC |
1052 | { |
1053 | int i; | |
1054 | X509_ATTRIBUTE *xa; | |
1055 | ASN1_OBJECT *o; | |
1056 | ||
1057 | o = OBJ_nid2obj(nid); | |
1058 | if (!o || !sk) | |
1059 | return (NULL); | |
1060 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1061 | xa = sk_X509_ATTRIBUTE_value(sk, i); | |
1062 | if (OBJ_cmp(xa->object, o) == 0) { | |
1063 | if (!xa->single && sk_ASN1_TYPE_num(xa->value.set)) | |
1064 | return (sk_ASN1_TYPE_value(xa->value.set, 0)); | |
1065 | else | |
1066 | return (NULL); | |
1067 | } | |
1068 | } | |
1069 | return (NULL); | |
1070 | } | |
dfeab068 | 1071 | |
b6436ff2 | 1072 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1073 | { |
40720ce3 MC |
1074 | ASN1_TYPE *astype; |
1075 | if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) | |
1076 | return NULL; | |
1077 | return astype->value.octet_string; | |
10243d97 | 1078 | } |
dfeab068 | 1079 | |
b6436ff2 | 1080 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
40720ce3 MC |
1081 | STACK_OF(X509_ATTRIBUTE) *sk) |
1082 | { | |
1083 | int i; | |
1084 | ||
1085 | if (p7si->auth_attr != NULL) | |
1086 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); | |
1087 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1088 | if (p7si->auth_attr == NULL) | |
1089 | return 0; | |
1090 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1091 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1092 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1093 | (sk, i)))) | |
1094 | == NULL) | |
1095 | return (0); | |
1096 | } | |
1097 | return (1); | |
1098 | } | |
1099 | ||
1100 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1101 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1102 | { | |
1103 | int i; | |
1104 | ||
1105 | if (p7si->unauth_attr != NULL) | |
1106 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); | |
1107 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1108 | if (p7si->unauth_attr == NULL) | |
1109 | return 0; | |
1110 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1111 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1112 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1113 | (sk, i)))) | |
1114 | == NULL) | |
1115 | return (0); | |
1116 | } | |
1117 | return (1); | |
1118 | } | |
dfeab068 | 1119 | |
6b691a5c | 1120 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
40720ce3 MC |
1121 | void *value) |
1122 | { | |
1123 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1124 | } | |
dfeab068 | 1125 | |
6b691a5c | 1126 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
40720ce3 MC |
1127 | void *value) |
1128 | { | |
1129 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1130 | } | |
dfeab068 | 1131 | |
b6436ff2 | 1132 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
40720ce3 MC |
1133 | void *value) |
1134 | { | |
1135 | X509_ATTRIBUTE *attr = NULL; | |
1136 | ||
1137 | if (*sk == NULL) { | |
1138 | if (!(*sk = sk_X509_ATTRIBUTE_new_null())) | |
1139 | return 0; | |
1140 | new_attrib: | |
1141 | if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value))) | |
1142 | return 0; | |
1143 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1144 | X509_ATTRIBUTE_free(attr); | |
1145 | return 0; | |
1146 | } | |
1147 | } else { | |
1148 | int i; | |
1149 | ||
1150 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1151 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
1152 | if (OBJ_obj2nid(attr->object) == nid) { | |
1153 | X509_ATTRIBUTE_free(attr); | |
1154 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1155 | if (attr == NULL) | |
1156 | return 0; | |
1157 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1158 | X509_ATTRIBUTE_free(attr); | |
1159 | return 0; | |
1160 | } | |
1161 | goto end; | |
1162 | } | |
1163 | } | |
1164 | goto new_attrib; | |
1165 | } | |
1166 | end: | |
1167 | return (1); | |
1168 | } |