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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. | |
0f113f3e | 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). | |
0f113f3e | 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. | |
0f113f3e | 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 :-). | |
0f113f3e | 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)" | |
0f113f3e | 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. | |
0f113f3e | 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> | |
b39fc560 | 60 | #include "internal/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> |
8f2e4fdf | 65 | #include <openssl/err.h> |
d02b48c6 | 66 | |
b6436ff2 | 67 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e | 68 | void *value); |
b6436ff2 | 69 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
dfeab068 | 70 | |
0f113f3e 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) |
0f113f3e 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) |
0f113f3e 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: | |
ca3a82c3 | 131 | BIO_free(btmp); |
0f113f3e | 132 | return 0; |
c5a55463 | 133 | |
0f113f3e | 134 | } |
399a6f0b | 135 | |
0f113f3e MC |
136 | static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
137 | unsigned char *key, int keylen) | |
138 | { | |
139 | EVP_PKEY_CTX *pctx = NULL; | |
140 | EVP_PKEY *pkey = NULL; | |
141 | unsigned char *ek = NULL; | |
142 | int ret = 0; | |
143 | size_t eklen; | |
399a6f0b | 144 | |
0f113f3e | 145 | pkey = X509_get_pubkey(ri->cert); |
399a6f0b | 146 | |
0f113f3e MC |
147 | if (!pkey) |
148 | return 0; | |
399a6f0b | 149 | |
0f113f3e MC |
150 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
151 | if (!pctx) | |
152 | return 0; | |
399a6f0b | 153 | |
0f113f3e MC |
154 | if (EVP_PKEY_encrypt_init(pctx) <= 0) |
155 | goto err; | |
399a6f0b | 156 | |
0f113f3e MC |
157 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
158 | EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) { | |
159 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); | |
160 | goto err; | |
161 | } | |
399a6f0b | 162 | |
0f113f3e MC |
163 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
164 | goto err; | |
399a6f0b | 165 | |
0f113f3e | 166 | ek = OPENSSL_malloc(eklen); |
399a6f0b | 167 | |
0f113f3e MC |
168 | if (ek == NULL) { |
169 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); | |
170 | goto err; | |
171 | } | |
399a6f0b | 172 | |
0f113f3e MC |
173 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
174 | goto err; | |
399a6f0b | 175 | |
0f113f3e MC |
176 | ASN1_STRING_set0(ri->enc_key, ek, eklen); |
177 | ek = NULL; | |
399a6f0b | 178 | |
0f113f3e | 179 | ret = 1; |
399a6f0b | 180 | |
0f113f3e | 181 | err: |
c5ba2d99 RS |
182 | EVP_PKEY_free(pkey); |
183 | EVP_PKEY_CTX_free(pctx); | |
b548a1f1 | 184 | OPENSSL_free(ek); |
0f113f3e | 185 | return ret; |
399a6f0b | 186 | |
0f113f3e | 187 | } |
399a6f0b | 188 | |
777c47ac | 189 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
0f113f3e MC |
190 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
191 | { | |
192 | EVP_PKEY_CTX *pctx = NULL; | |
193 | unsigned char *ek = NULL; | |
194 | size_t eklen; | |
195 | ||
196 | int ret = -1; | |
197 | ||
198 | pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
199 | if (!pctx) | |
200 | return -1; | |
201 | ||
202 | if (EVP_PKEY_decrypt_init(pctx) <= 0) | |
203 | goto err; | |
204 | ||
205 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, | |
206 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { | |
207 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); | |
208 | goto err; | |
209 | } | |
210 | ||
211 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, | |
212 | ri->enc_key->data, ri->enc_key->length) <= 0) | |
213 | goto err; | |
214 | ||
215 | ek = OPENSSL_malloc(eklen); | |
216 | ||
217 | if (ek == NULL) { | |
218 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); | |
219 | goto err; | |
220 | } | |
221 | ||
222 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, | |
223 | ri->enc_key->data, ri->enc_key->length) <= 0) { | |
224 | ret = 0; | |
225 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); | |
226 | goto err; | |
227 | } | |
228 | ||
229 | ret = 1; | |
230 | ||
4b45c6e5 | 231 | OPENSSL_clear_free(*pek, *peklen); |
0f113f3e MC |
232 | *pek = ek; |
233 | *peklen = eklen; | |
234 | ||
235 | err: | |
c5ba2d99 | 236 | EVP_PKEY_CTX_free(pctx); |
b548a1f1 | 237 | if (!ret) |
0f113f3e MC |
238 | OPENSSL_free(ek); |
239 | ||
240 | return ret; | |
241 | } | |
399a6f0b | 242 | |
6b691a5c | 243 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
244 | { |
245 | int i; | |
246 | BIO *out = NULL, *btmp = NULL; | |
247 | X509_ALGOR *xa = NULL; | |
248 | const EVP_CIPHER *evp_cipher = NULL; | |
249 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
250 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
251 | X509_ALGOR *xalg = NULL; | |
252 | PKCS7_RECIP_INFO *ri = NULL; | |
253 | ASN1_OCTET_STRING *os = NULL; | |
254 | ||
c225c3cf EK |
255 | if (p7 == NULL) { |
256 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
257 | return NULL; | |
258 | } | |
259 | /* | |
260 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
261 | * only applies to inner content (precisely, detached signatures). | |
262 | * | |
263 | * When reading content, missing outer content is therefore treated as an | |
264 | * error. | |
265 | * | |
266 | * When creating content, PKCS7_content_new() must be called before | |
267 | * calling this method, so a NULL p7->d is always an error. | |
268 | */ | |
269 | if (p7->d.ptr == NULL) { | |
270 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
271 | return NULL; | |
272 | } | |
273 | ||
0f113f3e MC |
274 | i = OBJ_obj2nid(p7->type); |
275 | p7->state = PKCS7_S_HEADER; | |
276 | ||
277 | switch (i) { | |
278 | case NID_pkcs7_signed: | |
279 | md_sk = p7->d.sign->md_algs; | |
280 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
281 | break; | |
282 | case NID_pkcs7_signedAndEnveloped: | |
283 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
284 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
285 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
286 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
287 | if (evp_cipher == NULL) { | |
288 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
289 | goto err; | |
290 | } | |
291 | break; | |
292 | case NID_pkcs7_enveloped: | |
293 | rsk = p7->d.enveloped->recipientinfo; | |
294 | xalg = p7->d.enveloped->enc_data->algorithm; | |
295 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
296 | if (evp_cipher == NULL) { | |
297 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
298 | goto err; | |
299 | } | |
300 | break; | |
301 | case NID_pkcs7_digest: | |
302 | xa = p7->d.digest->md; | |
303 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
304 | break; | |
305 | case NID_pkcs7_data: | |
306 | break; | |
307 | default: | |
308 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
309 | goto err; | |
310 | } | |
311 | ||
312 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
313 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
314 | goto err; | |
315 | ||
316 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
317 | goto err; | |
318 | ||
319 | if (evp_cipher != NULL) { | |
320 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
321 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
322 | int keylen, ivlen; | |
323 | EVP_CIPHER_CTX *ctx; | |
324 | ||
325 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
326 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
327 | goto err; | |
328 | } | |
329 | BIO_get_cipher_ctx(btmp, &ctx); | |
330 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
331 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
332 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
333 | if (ivlen > 0) | |
266483d2 | 334 | if (RAND_bytes(iv, ivlen) <= 0) |
0f113f3e MC |
335 | goto err; |
336 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
337 | goto err; | |
338 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
339 | goto err; | |
340 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
341 | goto err; | |
342 | ||
343 | if (ivlen > 0) { | |
344 | if (xalg->parameter == NULL) { | |
345 | xalg->parameter = ASN1_TYPE_new(); | |
346 | if (xalg->parameter == NULL) | |
347 | goto err; | |
348 | } | |
349 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
350 | goto err; | |
351 | } | |
352 | ||
353 | /* Lets do the pub key stuff :-) */ | |
354 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
355 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
356 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
357 | goto err; | |
358 | } | |
359 | OPENSSL_cleanse(key, keylen); | |
360 | ||
361 | if (out == NULL) | |
362 | out = btmp; | |
363 | else | |
364 | BIO_push(out, btmp); | |
365 | btmp = NULL; | |
366 | } | |
367 | ||
368 | if (bio == NULL) { | |
369 | if (PKCS7_is_detached(p7)) | |
370 | bio = BIO_new(BIO_s_null()); | |
371 | else if (os && os->length > 0) | |
372 | bio = BIO_new_mem_buf(os->data, os->length); | |
373 | if (bio == NULL) { | |
374 | bio = BIO_new(BIO_s_mem()); | |
375 | if (bio == NULL) | |
376 | goto err; | |
377 | BIO_set_mem_eof_return(bio, 0); | |
378 | } | |
379 | } | |
380 | if (out) | |
381 | BIO_push(out, bio); | |
382 | else | |
383 | out = bio; | |
ca3a82c3 RS |
384 | return out; |
385 | ||
0f113f3e | 386 | err: |
ca3a82c3 RS |
387 | BIO_free_all(out); |
388 | BIO_free_all(btmp); | |
389 | return NULL; | |
0f113f3e | 390 | } |
dfeab068 | 391 | |
8f2e4fdf | 392 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
0f113f3e MC |
393 | { |
394 | int ret; | |
395 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
a8d8e06b | 396 | X509_get_issuer_name(pcert)); |
0f113f3e MC |
397 | if (ret) |
398 | return ret; | |
a8d8e06b DSH |
399 | return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert), |
400 | ri->issuer_and_serial->serial); | |
0f113f3e | 401 | } |
8f2e4fdf | 402 | |
dfeab068 | 403 | /* int */ |
84fa704c | 404 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
0f113f3e MC |
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 | ||
c225c3cf EK |
420 | if (p7 == NULL) { |
421 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
422 | return NULL; | |
423 | } | |
424 | ||
425 | if (p7->d.ptr == NULL) { | |
426 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
427 | return NULL; | |
428 | } | |
429 | ||
0f113f3e MC |
430 | i = OBJ_obj2nid(p7->type); |
431 | p7->state = PKCS7_S_HEADER; | |
432 | ||
433 | switch (i) { | |
434 | case NID_pkcs7_signed: | |
59302b60 EK |
435 | /* |
436 | * p7->d.sign->contents is a PKCS7 structure consisting of a contentType | |
437 | * field and optional content. | |
438 | * data_body is NULL if that structure has no (=detached) content | |
439 | * or if the contentType is wrong (i.e., not "data"). | |
440 | */ | |
0f113f3e MC |
441 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); |
442 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
443 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
444 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
445 | goto err; | |
446 | } | |
447 | md_sk = p7->d.sign->md_algs; | |
448 | break; | |
449 | case NID_pkcs7_signedAndEnveloped: | |
450 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
451 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
59302b60 | 452 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
453 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; |
454 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
455 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
456 | if (evp_cipher == NULL) { | |
457 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
458 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
459 | goto err; | |
460 | } | |
461 | break; | |
462 | case NID_pkcs7_enveloped: | |
463 | rsk = p7->d.enveloped->recipientinfo; | |
464 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
59302b60 | 465 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
466 | data_body = p7->d.enveloped->enc_data->enc_data; |
467 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
468 | if (evp_cipher == NULL) { | |
469 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
470 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
471 | goto err; | |
472 | } | |
473 | break; | |
474 | default: | |
475 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
476 | goto err; | |
477 | } | |
478 | ||
59302b60 EK |
479 | /* Detached content must be supplied via in_bio instead. */ |
480 | if (data_body == NULL && in_bio == NULL) { | |
481 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
482 | goto err; | |
483 | } | |
484 | ||
0f113f3e MC |
485 | /* We will be checking the signature */ |
486 | if (md_sk != NULL) { | |
487 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
488 | xa = sk_X509_ALGOR_value(md_sk, i); | |
489 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
490 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
491 | goto err; | |
492 | } | |
493 | ||
494 | j = OBJ_obj2nid(xa->algorithm); | |
495 | evp_md = EVP_get_digestbynid(j); | |
496 | if (evp_md == NULL) { | |
497 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
498 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
499 | goto err; | |
500 | } | |
501 | ||
502 | BIO_set_md(btmp, evp_md); | |
503 | if (out == NULL) | |
504 | out = btmp; | |
505 | else | |
506 | BIO_push(out, btmp); | |
507 | btmp = NULL; | |
508 | } | |
509 | } | |
510 | ||
511 | if (evp_cipher != NULL) { | |
0f113f3e MC |
512 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
513 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
514 | goto err; | |
515 | } | |
516 | ||
517 | /* | |
518 | * It was encrypted, we need to decrypt the secret key with the | |
519 | * private key | |
520 | */ | |
521 | ||
522 | /* | |
523 | * Find the recipientInfo which matches the passed certificate (if | |
524 | * any) | |
525 | */ | |
526 | ||
527 | if (pcert) { | |
528 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
529 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
530 | if (!pkcs7_cmp_ri(ri, pcert)) | |
531 | break; | |
532 | ri = NULL; | |
533 | } | |
534 | if (ri == NULL) { | |
535 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
536 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
537 | goto err; | |
538 | } | |
539 | } | |
540 | ||
541 | /* If we haven't got a certificate try each ri in turn */ | |
542 | if (pcert == NULL) { | |
543 | /* | |
544 | * Always attempt to decrypt all rinfo even after success as a | |
545 | * defence against MMA timing attacks. | |
546 | */ | |
547 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
548 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
549 | ||
550 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
551 | goto err; | |
552 | ERR_clear_error(); | |
553 | } | |
554 | } else { | |
555 | /* Only exit on fatal errors, not decrypt failure */ | |
556 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
557 | goto err; | |
558 | ERR_clear_error(); | |
559 | } | |
560 | ||
561 | evp_ctx = NULL; | |
562 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
563 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
564 | goto err; | |
565 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
566 | goto err; | |
567 | /* Generate random key as MMA defence */ | |
568 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
569 | tkey = OPENSSL_malloc(tkeylen); | |
90945fa3 | 570 | if (tkey == NULL) |
0f113f3e MC |
571 | goto err; |
572 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
573 | goto err; | |
574 | if (ek == NULL) { | |
575 | ek = tkey; | |
576 | eklen = tkeylen; | |
577 | tkey = NULL; | |
578 | } | |
579 | ||
580 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
581 | /* | |
582 | * Some S/MIME clients don't use the same key and effective key | |
583 | * length. The key length is determined by the size of the | |
584 | * decrypted RSA key. | |
585 | */ | |
586 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
587 | /* Use random key as MMA defence */ | |
4b45c6e5 | 588 | OPENSSL_clear_free(ek, eklen); |
0f113f3e MC |
589 | ek = tkey; |
590 | eklen = tkeylen; | |
591 | tkey = NULL; | |
592 | } | |
593 | } | |
594 | /* Clear errors so we don't leak information useful in MMA */ | |
595 | ERR_clear_error(); | |
596 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
597 | goto err; | |
598 | ||
4b45c6e5 RS |
599 | OPENSSL_clear_free(ek, eklen); |
600 | ek = NULL; | |
601 | OPENSSL_clear_free(tkey, tkeylen); | |
602 | tkey = NULL; | |
0f113f3e MC |
603 | |
604 | if (out == NULL) | |
605 | out = etmp; | |
606 | else | |
607 | BIO_push(out, etmp); | |
608 | etmp = NULL; | |
609 | } | |
59302b60 | 610 | if (in_bio != NULL) { |
0f113f3e MC |
611 | bio = in_bio; |
612 | } else { | |
0f113f3e MC |
613 | if (data_body->length > 0) |
614 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
615 | else { | |
616 | bio = BIO_new(BIO_s_mem()); | |
90945fa3 MC |
617 | if (bio == NULL) |
618 | goto err; | |
0f113f3e MC |
619 | BIO_set_mem_eof_return(bio, 0); |
620 | } | |
621 | if (bio == NULL) | |
622 | goto err; | |
0f113f3e MC |
623 | } |
624 | BIO_push(out, bio); | |
625 | bio = NULL; | |
4b45c6e5 RS |
626 | return out; |
627 | ||
0f113f3e | 628 | err: |
4b45c6e5 RS |
629 | OPENSSL_clear_free(ek, eklen); |
630 | OPENSSL_clear_free(tkey, tkeylen); | |
631 | BIO_free_all(out); | |
632 | BIO_free_all(btmp); | |
633 | BIO_free_all(etmp); | |
634 | BIO_free_all(bio); | |
635 | return NULL; | |
0f113f3e | 636 | } |
d02b48c6 | 637 | |
c5a55463 | 638 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
0f113f3e MC |
639 | { |
640 | for (;;) { | |
641 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
642 | if (bio == NULL) { | |
643 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
644 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
645 | return NULL; | |
646 | } | |
647 | BIO_get_md_ctx(bio, pmd); | |
648 | if (*pmd == NULL) { | |
649 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
650 | return NULL; | |
651 | } | |
652 | if (EVP_MD_CTX_type(*pmd) == nid) | |
653 | return bio; | |
654 | bio = BIO_next(bio); | |
655 | } | |
656 | return NULL; | |
657 | } | |
c5a55463 | 658 | |
76fa8f18 | 659 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
0f113f3e MC |
660 | { |
661 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
662 | unsigned int md_len; | |
663 | ||
664 | /* Add signing time if not already present */ | |
665 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
666 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
667 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
668 | return 0; | |
669 | } | |
670 | } | |
671 | ||
672 | /* Add digest */ | |
673 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
674 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
675 | return 0; | |
676 | } | |
677 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
678 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
679 | return 0; | |
680 | } | |
681 | ||
682 | /* Now sign the attributes */ | |
683 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
684 | return 0; | |
685 | ||
686 | return 1; | |
687 | } | |
688 | ||
6b691a5c | 689 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
690 | { |
691 | int ret = 0; | |
692 | int i, j; | |
693 | BIO *btmp; | |
694 | PKCS7_SIGNER_INFO *si; | |
6e59a892 | 695 | EVP_MD_CTX *mdc, *ctx_tmp; |
0f113f3e MC |
696 | STACK_OF(X509_ATTRIBUTE) *sk; |
697 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
698 | ASN1_OCTET_STRING *os = NULL; | |
699 | ||
c225c3cf EK |
700 | if (p7 == NULL) { |
701 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
702 | return 0; | |
703 | } | |
704 | ||
705 | if (p7->d.ptr == NULL) { | |
706 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
707 | return 0; | |
708 | } | |
709 | ||
bfb0641f | 710 | ctx_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
711 | if (ctx_tmp == NULL) { |
712 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
713 | return 0; | |
714 | } | |
715 | ||
0f113f3e MC |
716 | i = OBJ_obj2nid(p7->type); |
717 | p7->state = PKCS7_S_HEADER; | |
718 | ||
719 | switch (i) { | |
720 | case NID_pkcs7_data: | |
721 | os = p7->d.data; | |
722 | break; | |
723 | case NID_pkcs7_signedAndEnveloped: | |
724 | /* XXXXXXXXXXXXXXXX */ | |
725 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
726 | os = p7->d.signed_and_enveloped->enc_data->enc_data; | |
90945fa3 | 727 | if (os == NULL) { |
f422a514 | 728 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 729 | if (os == NULL) { |
0f113f3e MC |
730 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
731 | goto err; | |
732 | } | |
733 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
734 | } | |
735 | break; | |
736 | case NID_pkcs7_enveloped: | |
737 | /* XXXXXXXXXXXXXXXX */ | |
738 | os = p7->d.enveloped->enc_data->enc_data; | |
90945fa3 | 739 | if (os == NULL) { |
f422a514 | 740 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 741 | if (os == NULL) { |
0f113f3e MC |
742 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
743 | goto err; | |
744 | } | |
745 | p7->d.enveloped->enc_data->enc_data = os; | |
746 | } | |
747 | break; | |
748 | case NID_pkcs7_signed: | |
749 | si_sk = p7->d.sign->signer_info; | |
750 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
751 | /* If detached data then the content is excluded */ | |
752 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
f422a514 | 753 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 754 | os = NULL; |
0f113f3e MC |
755 | p7->d.sign->contents->d.data = NULL; |
756 | } | |
757 | break; | |
758 | ||
759 | case NID_pkcs7_digest: | |
760 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
761 | /* If detached data then the content is excluded */ | |
762 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
f422a514 | 763 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 764 | os = NULL; |
0f113f3e MC |
765 | p7->d.digest->contents->d.data = NULL; |
766 | } | |
767 | break; | |
768 | ||
769 | default: | |
770 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
771 | goto err; | |
772 | } | |
773 | ||
774 | if (si_sk != NULL) { | |
775 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
776 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
777 | if (si->pkey == NULL) | |
778 | continue; | |
779 | ||
780 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
781 | ||
782 | btmp = bio; | |
783 | ||
784 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
785 | ||
786 | if (btmp == NULL) | |
787 | goto err; | |
788 | ||
789 | /* | |
790 | * We now have the EVP_MD_CTX, lets do the signing. | |
791 | */ | |
6e59a892 | 792 | if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc)) |
0f113f3e MC |
793 | goto err; |
794 | ||
795 | sk = si->auth_attr; | |
796 | ||
797 | /* | |
798 | * If there are attributes, we add the digest attribute and only | |
799 | * sign the attributes | |
800 | */ | |
801 | if (sk_X509_ATTRIBUTE_num(sk) > 0) { | |
6e59a892 | 802 | if (!do_pkcs7_signed_attrib(si, ctx_tmp)) |
0f113f3e MC |
803 | goto err; |
804 | } else { | |
805 | unsigned char *abuf = NULL; | |
806 | unsigned int abuflen; | |
807 | abuflen = EVP_PKEY_size(si->pkey); | |
808 | abuf = OPENSSL_malloc(abuflen); | |
90945fa3 | 809 | if (abuf == NULL) |
0f113f3e MC |
810 | goto err; |
811 | ||
6e59a892 | 812 | if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) { |
0f113f3e MC |
813 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); |
814 | goto err; | |
815 | } | |
816 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); | |
817 | } | |
818 | } | |
819 | } else if (i == NID_pkcs7_digest) { | |
820 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
821 | unsigned int md_len; | |
822 | if (!PKCS7_find_digest(&mdc, bio, | |
823 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
824 | goto err; | |
825 | if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) | |
826 | goto err; | |
f422a514 | 827 | ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); |
0f113f3e MC |
828 | } |
829 | ||
c225c3cf | 830 | if (!PKCS7_is_detached(p7)) { |
0f113f3e | 831 | /* |
c225c3cf EK |
832 | * NOTE(emilia): I think we only reach os == NULL here because detached |
833 | * digested data support is broken. | |
0f113f3e | 834 | */ |
c225c3cf EK |
835 | if (os == NULL) |
836 | goto err; | |
837 | if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { | |
838 | char *cont; | |
839 | long contlen; | |
840 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); | |
841 | if (btmp == NULL) { | |
842 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
843 | goto err; | |
844 | } | |
845 | contlen = BIO_get_mem_data(btmp, &cont); | |
846 | /* | |
847 | * Mark the BIO read only then we can use its copy of the data | |
848 | * instead of making an extra copy. | |
849 | */ | |
850 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
851 | BIO_set_mem_eof_return(btmp, 0); | |
852 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); | |
853 | } | |
0f113f3e MC |
854 | } |
855 | ret = 1; | |
856 | err: | |
bfb0641f | 857 | EVP_MD_CTX_free(ctx_tmp); |
0f113f3e MC |
858 | return (ret); |
859 | } | |
d02b48c6 | 860 | |
76fa8f18 | 861 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
0f113f3e | 862 | { |
6e59a892 | 863 | EVP_MD_CTX *mctx; |
0f113f3e MC |
864 | EVP_PKEY_CTX *pctx; |
865 | unsigned char *abuf = NULL; | |
866 | int alen; | |
867 | size_t siglen; | |
868 | const EVP_MD *md = NULL; | |
869 | ||
870 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); | |
871 | if (md == NULL) | |
872 | return 0; | |
873 | ||
bfb0641f | 874 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
875 | if (mctx == NULL) { |
876 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE); | |
877 | goto err; | |
878 | } | |
879 | ||
880 | if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0) | |
0f113f3e MC |
881 | goto err; |
882 | ||
883 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
884 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
885 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
886 | goto err; | |
887 | } | |
888 | ||
889 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
890 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
891 | if (!abuf) | |
892 | goto err; | |
6e59a892 | 893 | if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0) |
0f113f3e MC |
894 | goto err; |
895 | OPENSSL_free(abuf); | |
896 | abuf = NULL; | |
6e59a892 | 897 | if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0) |
0f113f3e MC |
898 | goto err; |
899 | abuf = OPENSSL_malloc(siglen); | |
90945fa3 | 900 | if (abuf == NULL) |
0f113f3e | 901 | goto err; |
6e59a892 | 902 | if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0) |
0f113f3e MC |
903 | goto err; |
904 | ||
905 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
906 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
907 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
908 | goto err; | |
909 | } | |
910 | ||
bfb0641f | 911 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
912 | |
913 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
914 | ||
915 | return 1; | |
916 | ||
917 | err: | |
b548a1f1 | 918 | OPENSSL_free(abuf); |
bfb0641f | 919 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
920 | return 0; |
921 | ||
922 | } | |
76fa8f18 | 923 | |
6b691a5c | 924 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
0f113f3e MC |
925 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
926 | { | |
927 | PKCS7_ISSUER_AND_SERIAL *ias; | |
928 | int ret = 0, i; | |
929 | STACK_OF(X509) *cert; | |
930 | X509 *x509; | |
931 | ||
c225c3cf EK |
932 | if (p7 == NULL) { |
933 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
934 | return 0; | |
935 | } | |
936 | ||
937 | if (p7->d.ptr == NULL) { | |
938 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
939 | return 0; | |
940 | } | |
941 | ||
0f113f3e MC |
942 | if (PKCS7_type_is_signed(p7)) { |
943 | cert = p7->d.sign->cert; | |
944 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
945 | cert = p7->d.signed_and_enveloped->cert; | |
946 | } else { | |
947 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
948 | goto err; | |
949 | } | |
950 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
951 | ias = si->issuer_and_serial; | |
952 | ||
953 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
954 | ||
955 | /* were we able to find the cert in passed to us */ | |
956 | if (x509 == NULL) { | |
957 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
958 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
959 | goto err; | |
960 | } | |
961 | ||
962 | /* Lets verify */ | |
963 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
964 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
965 | goto err; | |
966 | } | |
967 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
968 | i = X509_verify_cert(ctx); | |
969 | if (i <= 0) { | |
970 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
971 | X509_STORE_CTX_cleanup(ctx); | |
972 | goto err; | |
973 | } | |
974 | X509_STORE_CTX_cleanup(ctx); | |
975 | ||
976 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
977 | err: | |
978 | return ret; | |
979 | } | |
170afce5 DSH |
980 | |
981 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
0f113f3e | 982 | X509 *x509) |
dfeab068 | 983 | { |
0f113f3e | 984 | ASN1_OCTET_STRING *os; |
6e59a892 | 985 | EVP_MD_CTX *mdc_tmp, *mdc; |
0f113f3e MC |
986 | int ret = 0, i; |
987 | int md_type; | |
988 | STACK_OF(X509_ATTRIBUTE) *sk; | |
989 | BIO *btmp; | |
990 | EVP_PKEY *pkey; | |
991 | ||
bfb0641f | 992 | mdc_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
993 | if (mdc_tmp == NULL) { |
994 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE); | |
995 | goto err; | |
996 | } | |
0f113f3e MC |
997 | |
998 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
999 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
1000 | goto err; | |
1001 | } | |
1002 | ||
1003 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
1004 | ||
1005 | btmp = bio; | |
1006 | for (;;) { | |
1007 | if ((btmp == NULL) || | |
1008 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
1009 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1010 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1011 | goto err; | |
1012 | } | |
1013 | BIO_get_md_ctx(btmp, &mdc); | |
1014 | if (mdc == NULL) { | |
1015 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
1016 | goto err; | |
1017 | } | |
1018 | if (EVP_MD_CTX_type(mdc) == md_type) | |
1019 | break; | |
1020 | /* | |
1021 | * Workaround for some broken clients that put the signature OID | |
1022 | * instead of the digest OID in digest_alg->algorithm | |
1023 | */ | |
1024 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
1025 | break; | |
1026 | btmp = BIO_next(btmp); | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * mdc is the digest ctx that we want, unless there are attributes, in | |
1031 | * which case the digest is the signed attributes | |
1032 | */ | |
6e59a892 | 1033 | if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc)) |
0f113f3e MC |
1034 | goto err; |
1035 | ||
1036 | sk = si->auth_attr; | |
1037 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
1038 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
1039 | unsigned int md_len; | |
1040 | int alen; | |
1041 | ASN1_OCTET_STRING *message_digest; | |
1042 | ||
6e59a892 | 1043 | if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len)) |
0f113f3e MC |
1044 | goto err; |
1045 | message_digest = PKCS7_digest_from_attributes(sk); | |
1046 | if (!message_digest) { | |
1047 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1048 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1049 | goto err; | |
1050 | } | |
1051 | if ((message_digest->length != (int)md_len) || | |
1052 | (memcmp(message_digest->data, md_dat, md_len))) { | |
0f113f3e MC |
1053 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1054 | ret = -1; | |
1055 | goto err; | |
1056 | } | |
1057 | ||
6e59a892 | 1058 | if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL)) |
0f113f3e MC |
1059 | goto err; |
1060 | ||
1061 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1062 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1063 | if (alen <= 0) { | |
1064 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1065 | ret = -1; | |
1066 | goto err; | |
1067 | } | |
6e59a892 | 1068 | if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen)) |
0f113f3e MC |
1069 | goto err; |
1070 | ||
1071 | OPENSSL_free(abuf); | |
1072 | } | |
1073 | ||
1074 | os = si->enc_digest; | |
1075 | pkey = X509_get_pubkey(x509); | |
1076 | if (!pkey) { | |
1077 | ret = -1; | |
1078 | goto err; | |
1079 | } | |
1080 | ||
6e59a892 | 1081 | i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey); |
0f113f3e MC |
1082 | EVP_PKEY_free(pkey); |
1083 | if (i <= 0) { | |
1084 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1085 | ret = -1; | |
1086 | goto err; | |
c5ba2d99 RS |
1087 | } |
1088 | ret = 1; | |
0f113f3e | 1089 | err: |
bfb0641f | 1090 | EVP_MD_CTX_free(mdc_tmp); |
0f113f3e MC |
1091 | return (ret); |
1092 | } | |
d02b48c6 | 1093 | |
6b691a5c | 1094 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
0f113f3e MC |
1095 | { |
1096 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1097 | PKCS7_RECIP_INFO *ri; | |
1098 | int i; | |
1099 | ||
1100 | i = OBJ_obj2nid(p7->type); | |
1101 | if (i != NID_pkcs7_signedAndEnveloped) | |
1102 | return NULL; | |
1103 | if (p7->d.signed_and_enveloped == NULL) | |
1104 | return NULL; | |
1105 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1106 | if (rsk == NULL) | |
1107 | return NULL; | |
0f113f3e MC |
1108 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) |
1109 | return (NULL); | |
1110 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1111 | return (ri->issuer_and_serial); | |
1112 | } | |
dfeab068 | 1113 | |
6b691a5c | 1114 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1115 | { |
1116 | return (get_attribute(si->auth_attr, nid)); | |
1117 | } | |
dfeab068 | 1118 | |
6b691a5c | 1119 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1120 | { |
1121 | return (get_attribute(si->unauth_attr, nid)); | |
1122 | } | |
dfeab068 | 1123 | |
b6436ff2 | 1124 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
0f113f3e | 1125 | { |
9b0a4531 | 1126 | int idx; |
0f113f3e | 1127 | X509_ATTRIBUTE *xa; |
9b0a4531 DSH |
1128 | idx = X509at_get_attr_by_NID(sk, nid, -1); |
1129 | xa = X509at_get_attr(sk, idx); | |
1130 | return X509_ATTRIBUTE_get0_type(xa, 0); | |
0f113f3e | 1131 | } |
dfeab068 | 1132 | |
b6436ff2 | 1133 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1134 | { |
0f113f3e | 1135 | ASN1_TYPE *astype; |
75ebbd9a | 1136 | if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL) |
0f113f3e MC |
1137 | return NULL; |
1138 | return astype->value.octet_string; | |
10243d97 | 1139 | } |
dfeab068 | 1140 | |
b6436ff2 | 1141 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
0f113f3e MC |
1142 | STACK_OF(X509_ATTRIBUTE) *sk) |
1143 | { | |
1144 | int i; | |
1145 | ||
222561fe | 1146 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1147 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1148 | if (p7si->auth_attr == NULL) | |
1149 | return 0; | |
1150 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1151 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1152 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1153 | (sk, i)))) | |
1154 | == NULL) | |
1155 | return (0); | |
1156 | } | |
1157 | return (1); | |
1158 | } | |
1159 | ||
1160 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1161 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1162 | { | |
1163 | int i; | |
1164 | ||
222561fe | 1165 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1166 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1167 | if (p7si->unauth_attr == NULL) | |
1168 | return 0; | |
1169 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1170 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1171 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1172 | (sk, i)))) | |
1173 | == NULL) | |
1174 | return (0); | |
1175 | } | |
1176 | return (1); | |
1177 | } | |
dfeab068 | 1178 | |
6b691a5c | 1179 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1180 | void *value) |
1181 | { | |
1182 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1183 | } | |
dfeab068 | 1184 | |
6b691a5c | 1185 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1186 | void *value) |
1187 | { | |
1188 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1189 | } | |
dfeab068 | 1190 | |
b6436ff2 | 1191 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e MC |
1192 | void *value) |
1193 | { | |
1194 | X509_ATTRIBUTE *attr = NULL; | |
1195 | ||
1196 | if (*sk == NULL) { | |
75ebbd9a | 1197 | if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL) |
0f113f3e MC |
1198 | return 0; |
1199 | new_attrib: | |
75ebbd9a | 1200 | if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL) |
0f113f3e MC |
1201 | return 0; |
1202 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1203 | X509_ATTRIBUTE_free(attr); | |
1204 | return 0; | |
1205 | } | |
1206 | } else { | |
1207 | int i; | |
1208 | ||
1209 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1210 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
9b0a4531 | 1211 | if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) { |
0f113f3e MC |
1212 | X509_ATTRIBUTE_free(attr); |
1213 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1214 | if (attr == NULL) | |
1215 | return 0; | |
1216 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1217 | X509_ATTRIBUTE_free(attr); | |
1218 | return 0; | |
1219 | } | |
1220 | goto end; | |
1221 | } | |
1222 | } | |
1223 | goto new_attrib; | |
1224 | } | |
1225 | end: | |
1226 | return (1); | |
1227 | } |