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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
b39fc560 | 59 | #include "internal/cryptlib.h" |
ec577822 BM |
60 | #include <openssl/rand.h> |
61 | #include <openssl/objects.h> | |
62 | #include <openssl/x509.h> | |
5a9a4b29 | 63 | #include <openssl/x509v3.h> |
8f2e4fdf | 64 | #include <openssl/err.h> |
d02b48c6 | 65 | |
b6436ff2 | 66 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e | 67 | void *value); |
b6436ff2 | 68 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
dfeab068 | 69 | |
0f113f3e MC |
70 | static int PKCS7_type_is_other(PKCS7 *p7) |
71 | { | |
72 | int isOther = 1; | |
73 | ||
74 | int nid = OBJ_obj2nid(p7->type); | |
75 | ||
76 | switch (nid) { | |
77 | case NID_pkcs7_data: | |
78 | case NID_pkcs7_signed: | |
79 | case NID_pkcs7_enveloped: | |
80 | case NID_pkcs7_signedAndEnveloped: | |
81 | case NID_pkcs7_digest: | |
82 | case NID_pkcs7_encrypted: | |
83 | isOther = 0; | |
84 | break; | |
85 | default: | |
86 | isOther = 1; | |
87 | } | |
88 | ||
89 | return isOther; | |
90 | ||
91 | } | |
67fec850 | 92 | |
caf044cb | 93 | static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7) |
0f113f3e MC |
94 | { |
95 | if (PKCS7_type_is_data(p7)) | |
96 | return p7->d.data; | |
97 | if (PKCS7_type_is_other(p7) && p7->d.other | |
98 | && (p7->d.other->type == V_ASN1_OCTET_STRING)) | |
99 | return p7->d.other->value.octet_string; | |
100 | return NULL; | |
101 | } | |
67fec850 | 102 | |
c5a55463 | 103 | static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg) |
0f113f3e MC |
104 | { |
105 | BIO *btmp; | |
106 | const EVP_MD *md; | |
107 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
108 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); | |
109 | goto err; | |
110 | } | |
111 | ||
112 | md = EVP_get_digestbyobj(alg->algorithm); | |
113 | if (md == NULL) { | |
114 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
115 | goto err; | |
116 | } | |
117 | ||
118 | BIO_set_md(btmp, md); | |
119 | if (*pbio == NULL) | |
120 | *pbio = btmp; | |
121 | else if (!BIO_push(*pbio, btmp)) { | |
122 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); | |
123 | goto err; | |
124 | } | |
125 | btmp = NULL; | |
126 | ||
127 | return 1; | |
128 | ||
129 | err: | |
ca3a82c3 | 130 | BIO_free(btmp); |
0f113f3e | 131 | return 0; |
c5a55463 | 132 | |
0f113f3e | 133 | } |
399a6f0b | 134 | |
0f113f3e MC |
135 | static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
136 | unsigned char *key, int keylen) | |
137 | { | |
138 | EVP_PKEY_CTX *pctx = NULL; | |
139 | EVP_PKEY *pkey = NULL; | |
140 | unsigned char *ek = NULL; | |
141 | int ret = 0; | |
142 | size_t eklen; | |
399a6f0b | 143 | |
8382fd3a | 144 | pkey = X509_get0_pubkey(ri->cert); |
399a6f0b | 145 | |
0f113f3e MC |
146 | if (!pkey) |
147 | return 0; | |
399a6f0b | 148 | |
0f113f3e MC |
149 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
150 | if (!pctx) | |
151 | return 0; | |
399a6f0b | 152 | |
0f113f3e MC |
153 | if (EVP_PKEY_encrypt_init(pctx) <= 0) |
154 | goto err; | |
399a6f0b | 155 | |
0f113f3e MC |
156 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
157 | EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) { | |
158 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); | |
159 | goto err; | |
160 | } | |
399a6f0b | 161 | |
0f113f3e MC |
162 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
163 | goto err; | |
399a6f0b | 164 | |
0f113f3e | 165 | ek = OPENSSL_malloc(eklen); |
399a6f0b | 166 | |
0f113f3e MC |
167 | if (ek == NULL) { |
168 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); | |
169 | goto err; | |
170 | } | |
399a6f0b | 171 | |
0f113f3e MC |
172 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
173 | goto err; | |
399a6f0b | 174 | |
0f113f3e MC |
175 | ASN1_STRING_set0(ri->enc_key, ek, eklen); |
176 | ek = NULL; | |
399a6f0b | 177 | |
0f113f3e | 178 | ret = 1; |
399a6f0b | 179 | |
0f113f3e | 180 | err: |
c5ba2d99 | 181 | EVP_PKEY_CTX_free(pctx); |
b548a1f1 | 182 | OPENSSL_free(ek); |
0f113f3e | 183 | return ret; |
399a6f0b | 184 | |
0f113f3e | 185 | } |
399a6f0b | 186 | |
777c47ac | 187 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
0f113f3e MC |
188 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
189 | { | |
190 | EVP_PKEY_CTX *pctx = NULL; | |
191 | unsigned char *ek = NULL; | |
192 | size_t eklen; | |
193 | ||
194 | int ret = -1; | |
195 | ||
196 | pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
197 | if (!pctx) | |
198 | return -1; | |
199 | ||
200 | if (EVP_PKEY_decrypt_init(pctx) <= 0) | |
201 | goto err; | |
202 | ||
203 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, | |
204 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { | |
205 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); | |
206 | goto err; | |
207 | } | |
208 | ||
209 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, | |
210 | ri->enc_key->data, ri->enc_key->length) <= 0) | |
211 | goto err; | |
212 | ||
213 | ek = OPENSSL_malloc(eklen); | |
214 | ||
215 | if (ek == NULL) { | |
216 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); | |
217 | goto err; | |
218 | } | |
219 | ||
220 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, | |
221 | ri->enc_key->data, ri->enc_key->length) <= 0) { | |
222 | ret = 0; | |
223 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); | |
224 | goto err; | |
225 | } | |
226 | ||
227 | ret = 1; | |
228 | ||
4b45c6e5 | 229 | OPENSSL_clear_free(*pek, *peklen); |
0f113f3e MC |
230 | *pek = ek; |
231 | *peklen = eklen; | |
232 | ||
233 | err: | |
c5ba2d99 | 234 | EVP_PKEY_CTX_free(pctx); |
b548a1f1 | 235 | if (!ret) |
0f113f3e MC |
236 | OPENSSL_free(ek); |
237 | ||
238 | return ret; | |
239 | } | |
399a6f0b | 240 | |
6b691a5c | 241 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
242 | { |
243 | int i; | |
244 | BIO *out = NULL, *btmp = NULL; | |
245 | X509_ALGOR *xa = NULL; | |
246 | const EVP_CIPHER *evp_cipher = NULL; | |
247 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
248 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
249 | X509_ALGOR *xalg = NULL; | |
250 | PKCS7_RECIP_INFO *ri = NULL; | |
251 | ASN1_OCTET_STRING *os = NULL; | |
252 | ||
c225c3cf EK |
253 | if (p7 == NULL) { |
254 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
255 | return NULL; | |
256 | } | |
257 | /* | |
258 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
259 | * only applies to inner content (precisely, detached signatures). | |
260 | * | |
261 | * When reading content, missing outer content is therefore treated as an | |
262 | * error. | |
263 | * | |
264 | * When creating content, PKCS7_content_new() must be called before | |
265 | * calling this method, so a NULL p7->d is always an error. | |
266 | */ | |
267 | if (p7->d.ptr == NULL) { | |
268 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
269 | return NULL; | |
270 | } | |
271 | ||
0f113f3e MC |
272 | i = OBJ_obj2nid(p7->type); |
273 | p7->state = PKCS7_S_HEADER; | |
274 | ||
275 | switch (i) { | |
276 | case NID_pkcs7_signed: | |
277 | md_sk = p7->d.sign->md_algs; | |
278 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
279 | break; | |
280 | case NID_pkcs7_signedAndEnveloped: | |
281 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
282 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
283 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
284 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
285 | if (evp_cipher == NULL) { | |
286 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
287 | goto err; | |
288 | } | |
289 | break; | |
290 | case NID_pkcs7_enveloped: | |
291 | rsk = p7->d.enveloped->recipientinfo; | |
292 | xalg = p7->d.enveloped->enc_data->algorithm; | |
293 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
294 | if (evp_cipher == NULL) { | |
295 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
296 | goto err; | |
297 | } | |
298 | break; | |
299 | case NID_pkcs7_digest: | |
300 | xa = p7->d.digest->md; | |
301 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
302 | break; | |
303 | case NID_pkcs7_data: | |
304 | break; | |
305 | default: | |
306 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
307 | goto err; | |
308 | } | |
309 | ||
310 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
311 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
312 | goto err; | |
313 | ||
314 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
315 | goto err; | |
316 | ||
317 | if (evp_cipher != NULL) { | |
318 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
319 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
320 | int keylen, ivlen; | |
321 | EVP_CIPHER_CTX *ctx; | |
322 | ||
323 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
324 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
325 | goto err; | |
326 | } | |
327 | BIO_get_cipher_ctx(btmp, &ctx); | |
328 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
329 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
330 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
331 | if (ivlen > 0) | |
266483d2 | 332 | if (RAND_bytes(iv, ivlen) <= 0) |
0f113f3e MC |
333 | goto err; |
334 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
335 | goto err; | |
336 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
337 | goto err; | |
338 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
339 | goto err; | |
340 | ||
341 | if (ivlen > 0) { | |
342 | if (xalg->parameter == NULL) { | |
343 | xalg->parameter = ASN1_TYPE_new(); | |
344 | if (xalg->parameter == NULL) | |
345 | goto err; | |
346 | } | |
347 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
348 | goto err; | |
349 | } | |
350 | ||
351 | /* Lets do the pub key stuff :-) */ | |
352 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
353 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
354 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
355 | goto err; | |
356 | } | |
357 | OPENSSL_cleanse(key, keylen); | |
358 | ||
359 | if (out == NULL) | |
360 | out = btmp; | |
361 | else | |
362 | BIO_push(out, btmp); | |
363 | btmp = NULL; | |
364 | } | |
365 | ||
366 | if (bio == NULL) { | |
367 | if (PKCS7_is_detached(p7)) | |
368 | bio = BIO_new(BIO_s_null()); | |
369 | else if (os && os->length > 0) | |
370 | bio = BIO_new_mem_buf(os->data, os->length); | |
371 | if (bio == NULL) { | |
372 | bio = BIO_new(BIO_s_mem()); | |
373 | if (bio == NULL) | |
374 | goto err; | |
375 | BIO_set_mem_eof_return(bio, 0); | |
376 | } | |
377 | } | |
378 | if (out) | |
379 | BIO_push(out, bio); | |
380 | else | |
381 | out = bio; | |
ca3a82c3 RS |
382 | return out; |
383 | ||
0f113f3e | 384 | err: |
ca3a82c3 RS |
385 | BIO_free_all(out); |
386 | BIO_free_all(btmp); | |
387 | return NULL; | |
0f113f3e | 388 | } |
dfeab068 | 389 | |
8f2e4fdf | 390 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
0f113f3e MC |
391 | { |
392 | int ret; | |
393 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
a8d8e06b | 394 | X509_get_issuer_name(pcert)); |
0f113f3e MC |
395 | if (ret) |
396 | return ret; | |
a8d8e06b DSH |
397 | return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert), |
398 | ri->issuer_and_serial->serial); | |
0f113f3e | 399 | } |
8f2e4fdf | 400 | |
dfeab068 | 401 | /* int */ |
84fa704c | 402 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
0f113f3e MC |
403 | { |
404 | int i, j; | |
405 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
406 | X509_ALGOR *xa; | |
407 | ASN1_OCTET_STRING *data_body = NULL; | |
408 | const EVP_MD *evp_md; | |
409 | const EVP_CIPHER *evp_cipher = NULL; | |
410 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
411 | X509_ALGOR *enc_alg = NULL; | |
412 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
413 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
414 | PKCS7_RECIP_INFO *ri = NULL; | |
415 | unsigned char *ek = NULL, *tkey = NULL; | |
416 | int eklen = 0, tkeylen = 0; | |
417 | ||
c225c3cf EK |
418 | if (p7 == NULL) { |
419 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
420 | return NULL; | |
421 | } | |
422 | ||
423 | if (p7->d.ptr == NULL) { | |
424 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
425 | return NULL; | |
426 | } | |
427 | ||
0f113f3e MC |
428 | i = OBJ_obj2nid(p7->type); |
429 | p7->state = PKCS7_S_HEADER; | |
430 | ||
431 | switch (i) { | |
432 | case NID_pkcs7_signed: | |
59302b60 EK |
433 | /* |
434 | * p7->d.sign->contents is a PKCS7 structure consisting of a contentType | |
435 | * field and optional content. | |
436 | * data_body is NULL if that structure has no (=detached) content | |
437 | * or if the contentType is wrong (i.e., not "data"). | |
438 | */ | |
0f113f3e MC |
439 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); |
440 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
441 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
442 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
443 | goto err; | |
444 | } | |
445 | md_sk = p7->d.sign->md_algs; | |
446 | break; | |
447 | case NID_pkcs7_signedAndEnveloped: | |
448 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
449 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
59302b60 | 450 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
451 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; |
452 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
453 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
454 | if (evp_cipher == NULL) { | |
455 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
456 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
457 | goto err; | |
458 | } | |
459 | break; | |
460 | case NID_pkcs7_enveloped: | |
461 | rsk = p7->d.enveloped->recipientinfo; | |
462 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
59302b60 | 463 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
464 | data_body = p7->d.enveloped->enc_data->enc_data; |
465 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
466 | if (evp_cipher == NULL) { | |
467 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
468 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
469 | goto err; | |
470 | } | |
471 | break; | |
472 | default: | |
473 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
474 | goto err; | |
475 | } | |
476 | ||
59302b60 EK |
477 | /* Detached content must be supplied via in_bio instead. */ |
478 | if (data_body == NULL && in_bio == NULL) { | |
479 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
480 | goto err; | |
481 | } | |
482 | ||
0f113f3e MC |
483 | /* We will be checking the signature */ |
484 | if (md_sk != NULL) { | |
485 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
486 | xa = sk_X509_ALGOR_value(md_sk, i); | |
487 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
488 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
489 | goto err; | |
490 | } | |
491 | ||
492 | j = OBJ_obj2nid(xa->algorithm); | |
493 | evp_md = EVP_get_digestbynid(j); | |
494 | if (evp_md == NULL) { | |
495 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
496 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
497 | goto err; | |
498 | } | |
499 | ||
500 | BIO_set_md(btmp, evp_md); | |
501 | if (out == NULL) | |
502 | out = btmp; | |
503 | else | |
504 | BIO_push(out, btmp); | |
505 | btmp = NULL; | |
506 | } | |
507 | } | |
508 | ||
509 | if (evp_cipher != NULL) { | |
0f113f3e MC |
510 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
511 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
512 | goto err; | |
513 | } | |
514 | ||
515 | /* | |
516 | * It was encrypted, we need to decrypt the secret key with the | |
517 | * private key | |
518 | */ | |
519 | ||
520 | /* | |
521 | * Find the recipientInfo which matches the passed certificate (if | |
522 | * any) | |
523 | */ | |
524 | ||
525 | if (pcert) { | |
526 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
527 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
528 | if (!pkcs7_cmp_ri(ri, pcert)) | |
529 | break; | |
530 | ri = NULL; | |
531 | } | |
532 | if (ri == NULL) { | |
533 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
534 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
535 | goto err; | |
536 | } | |
537 | } | |
538 | ||
539 | /* If we haven't got a certificate try each ri in turn */ | |
540 | if (pcert == NULL) { | |
541 | /* | |
542 | * Always attempt to decrypt all rinfo even after success as a | |
543 | * defence against MMA timing attacks. | |
544 | */ | |
545 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
546 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
547 | ||
548 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
549 | goto err; | |
550 | ERR_clear_error(); | |
551 | } | |
552 | } else { | |
553 | /* Only exit on fatal errors, not decrypt failure */ | |
554 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
555 | goto err; | |
556 | ERR_clear_error(); | |
557 | } | |
558 | ||
559 | evp_ctx = NULL; | |
560 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
561 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
562 | goto err; | |
563 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
564 | goto err; | |
565 | /* Generate random key as MMA defence */ | |
566 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
567 | tkey = OPENSSL_malloc(tkeylen); | |
90945fa3 | 568 | if (tkey == NULL) |
0f113f3e MC |
569 | goto err; |
570 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
571 | goto err; | |
572 | if (ek == NULL) { | |
573 | ek = tkey; | |
574 | eklen = tkeylen; | |
575 | tkey = NULL; | |
576 | } | |
577 | ||
578 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
579 | /* | |
580 | * Some S/MIME clients don't use the same key and effective key | |
581 | * length. The key length is determined by the size of the | |
582 | * decrypted RSA key. | |
583 | */ | |
584 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
585 | /* Use random key as MMA defence */ | |
4b45c6e5 | 586 | OPENSSL_clear_free(ek, eklen); |
0f113f3e MC |
587 | ek = tkey; |
588 | eklen = tkeylen; | |
589 | tkey = NULL; | |
590 | } | |
591 | } | |
592 | /* Clear errors so we don't leak information useful in MMA */ | |
593 | ERR_clear_error(); | |
594 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
595 | goto err; | |
596 | ||
4b45c6e5 RS |
597 | OPENSSL_clear_free(ek, eklen); |
598 | ek = NULL; | |
599 | OPENSSL_clear_free(tkey, tkeylen); | |
600 | tkey = NULL; | |
0f113f3e MC |
601 | |
602 | if (out == NULL) | |
603 | out = etmp; | |
604 | else | |
605 | BIO_push(out, etmp); | |
606 | etmp = NULL; | |
607 | } | |
59302b60 | 608 | if (in_bio != NULL) { |
0f113f3e MC |
609 | bio = in_bio; |
610 | } else { | |
0f113f3e MC |
611 | if (data_body->length > 0) |
612 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
613 | else { | |
614 | bio = BIO_new(BIO_s_mem()); | |
90945fa3 MC |
615 | if (bio == NULL) |
616 | goto err; | |
0f113f3e MC |
617 | BIO_set_mem_eof_return(bio, 0); |
618 | } | |
619 | if (bio == NULL) | |
620 | goto err; | |
0f113f3e MC |
621 | } |
622 | BIO_push(out, bio); | |
623 | bio = NULL; | |
4b45c6e5 RS |
624 | return out; |
625 | ||
0f113f3e | 626 | err: |
4b45c6e5 RS |
627 | OPENSSL_clear_free(ek, eklen); |
628 | OPENSSL_clear_free(tkey, tkeylen); | |
629 | BIO_free_all(out); | |
630 | BIO_free_all(btmp); | |
631 | BIO_free_all(etmp); | |
632 | BIO_free_all(bio); | |
633 | return NULL; | |
0f113f3e | 634 | } |
d02b48c6 | 635 | |
c5a55463 | 636 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
0f113f3e MC |
637 | { |
638 | for (;;) { | |
639 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
640 | if (bio == NULL) { | |
641 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
642 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
643 | return NULL; | |
644 | } | |
645 | BIO_get_md_ctx(bio, pmd); | |
646 | if (*pmd == NULL) { | |
647 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
648 | return NULL; | |
649 | } | |
650 | if (EVP_MD_CTX_type(*pmd) == nid) | |
651 | return bio; | |
652 | bio = BIO_next(bio); | |
653 | } | |
654 | return NULL; | |
655 | } | |
c5a55463 | 656 | |
76fa8f18 | 657 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
0f113f3e MC |
658 | { |
659 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
660 | unsigned int md_len; | |
661 | ||
662 | /* Add signing time if not already present */ | |
663 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
664 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
665 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
666 | return 0; | |
667 | } | |
668 | } | |
669 | ||
670 | /* Add digest */ | |
671 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
672 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
673 | return 0; | |
674 | } | |
675 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
676 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
677 | return 0; | |
678 | } | |
679 | ||
680 | /* Now sign the attributes */ | |
681 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
682 | return 0; | |
683 | ||
684 | return 1; | |
685 | } | |
686 | ||
6b691a5c | 687 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
688 | { |
689 | int ret = 0; | |
690 | int i, j; | |
691 | BIO *btmp; | |
692 | PKCS7_SIGNER_INFO *si; | |
6e59a892 | 693 | EVP_MD_CTX *mdc, *ctx_tmp; |
0f113f3e MC |
694 | STACK_OF(X509_ATTRIBUTE) *sk; |
695 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
696 | ASN1_OCTET_STRING *os = NULL; | |
697 | ||
c225c3cf EK |
698 | if (p7 == NULL) { |
699 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | if (p7->d.ptr == NULL) { | |
704 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
705 | return 0; | |
706 | } | |
707 | ||
bfb0641f | 708 | ctx_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
709 | if (ctx_tmp == NULL) { |
710 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
711 | return 0; | |
712 | } | |
713 | ||
0f113f3e MC |
714 | i = OBJ_obj2nid(p7->type); |
715 | p7->state = PKCS7_S_HEADER; | |
716 | ||
717 | switch (i) { | |
718 | case NID_pkcs7_data: | |
719 | os = p7->d.data; | |
720 | break; | |
721 | case NID_pkcs7_signedAndEnveloped: | |
722 | /* XXXXXXXXXXXXXXXX */ | |
723 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
724 | os = p7->d.signed_and_enveloped->enc_data->enc_data; | |
90945fa3 | 725 | if (os == NULL) { |
f422a514 | 726 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 727 | if (os == NULL) { |
0f113f3e MC |
728 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
729 | goto err; | |
730 | } | |
731 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
732 | } | |
733 | break; | |
734 | case NID_pkcs7_enveloped: | |
735 | /* XXXXXXXXXXXXXXXX */ | |
736 | os = p7->d.enveloped->enc_data->enc_data; | |
90945fa3 | 737 | if (os == NULL) { |
f422a514 | 738 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 739 | if (os == NULL) { |
0f113f3e MC |
740 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
741 | goto err; | |
742 | } | |
743 | p7->d.enveloped->enc_data->enc_data = os; | |
744 | } | |
745 | break; | |
746 | case NID_pkcs7_signed: | |
747 | si_sk = p7->d.sign->signer_info; | |
748 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
749 | /* If detached data then the content is excluded */ | |
750 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
f422a514 | 751 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 752 | os = NULL; |
0f113f3e MC |
753 | p7->d.sign->contents->d.data = NULL; |
754 | } | |
755 | break; | |
756 | ||
757 | case NID_pkcs7_digest: | |
758 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
759 | /* If detached data then the content is excluded */ | |
760 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
f422a514 | 761 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 762 | os = NULL; |
0f113f3e MC |
763 | p7->d.digest->contents->d.data = NULL; |
764 | } | |
765 | break; | |
766 | ||
767 | default: | |
768 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
769 | goto err; | |
770 | } | |
771 | ||
772 | if (si_sk != NULL) { | |
773 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
774 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
775 | if (si->pkey == NULL) | |
776 | continue; | |
777 | ||
778 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
779 | ||
780 | btmp = bio; | |
781 | ||
782 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
783 | ||
784 | if (btmp == NULL) | |
785 | goto err; | |
786 | ||
787 | /* | |
788 | * We now have the EVP_MD_CTX, lets do the signing. | |
789 | */ | |
6e59a892 | 790 | if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc)) |
0f113f3e MC |
791 | goto err; |
792 | ||
793 | sk = si->auth_attr; | |
794 | ||
795 | /* | |
796 | * If there are attributes, we add the digest attribute and only | |
797 | * sign the attributes | |
798 | */ | |
799 | if (sk_X509_ATTRIBUTE_num(sk) > 0) { | |
6e59a892 | 800 | if (!do_pkcs7_signed_attrib(si, ctx_tmp)) |
0f113f3e MC |
801 | goto err; |
802 | } else { | |
803 | unsigned char *abuf = NULL; | |
804 | unsigned int abuflen; | |
805 | abuflen = EVP_PKEY_size(si->pkey); | |
806 | abuf = OPENSSL_malloc(abuflen); | |
90945fa3 | 807 | if (abuf == NULL) |
0f113f3e MC |
808 | goto err; |
809 | ||
6e59a892 | 810 | if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) { |
0f113f3e MC |
811 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); |
812 | goto err; | |
813 | } | |
814 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); | |
815 | } | |
816 | } | |
817 | } else if (i == NID_pkcs7_digest) { | |
818 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
819 | unsigned int md_len; | |
820 | if (!PKCS7_find_digest(&mdc, bio, | |
821 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
822 | goto err; | |
823 | if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) | |
824 | goto err; | |
f422a514 | 825 | ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); |
0f113f3e MC |
826 | } |
827 | ||
c225c3cf | 828 | if (!PKCS7_is_detached(p7)) { |
0f113f3e | 829 | /* |
c225c3cf EK |
830 | * NOTE(emilia): I think we only reach os == NULL here because detached |
831 | * digested data support is broken. | |
0f113f3e | 832 | */ |
c225c3cf EK |
833 | if (os == NULL) |
834 | goto err; | |
835 | if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { | |
836 | char *cont; | |
837 | long contlen; | |
838 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); | |
839 | if (btmp == NULL) { | |
840 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
841 | goto err; | |
842 | } | |
843 | contlen = BIO_get_mem_data(btmp, &cont); | |
844 | /* | |
845 | * Mark the BIO read only then we can use its copy of the data | |
846 | * instead of making an extra copy. | |
847 | */ | |
848 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
849 | BIO_set_mem_eof_return(btmp, 0); | |
850 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); | |
851 | } | |
0f113f3e MC |
852 | } |
853 | ret = 1; | |
854 | err: | |
bfb0641f | 855 | EVP_MD_CTX_free(ctx_tmp); |
0f113f3e MC |
856 | return (ret); |
857 | } | |
d02b48c6 | 858 | |
76fa8f18 | 859 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
0f113f3e | 860 | { |
6e59a892 | 861 | EVP_MD_CTX *mctx; |
0f113f3e MC |
862 | EVP_PKEY_CTX *pctx; |
863 | unsigned char *abuf = NULL; | |
864 | int alen; | |
865 | size_t siglen; | |
866 | const EVP_MD *md = NULL; | |
867 | ||
868 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); | |
869 | if (md == NULL) | |
870 | return 0; | |
871 | ||
bfb0641f | 872 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
873 | if (mctx == NULL) { |
874 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE); | |
875 | goto err; | |
876 | } | |
877 | ||
878 | if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0) | |
0f113f3e MC |
879 | goto err; |
880 | ||
881 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
882 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
883 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
884 | goto err; | |
885 | } | |
886 | ||
887 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
888 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
889 | if (!abuf) | |
890 | goto err; | |
6e59a892 | 891 | if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0) |
0f113f3e MC |
892 | goto err; |
893 | OPENSSL_free(abuf); | |
894 | abuf = NULL; | |
6e59a892 | 895 | if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0) |
0f113f3e MC |
896 | goto err; |
897 | abuf = OPENSSL_malloc(siglen); | |
90945fa3 | 898 | if (abuf == NULL) |
0f113f3e | 899 | goto err; |
6e59a892 | 900 | if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0) |
0f113f3e MC |
901 | goto err; |
902 | ||
903 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
904 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
905 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
906 | goto err; | |
907 | } | |
908 | ||
bfb0641f | 909 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
910 | |
911 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
912 | ||
913 | return 1; | |
914 | ||
915 | err: | |
b548a1f1 | 916 | OPENSSL_free(abuf); |
bfb0641f | 917 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
918 | return 0; |
919 | ||
920 | } | |
76fa8f18 | 921 | |
6b691a5c | 922 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
0f113f3e MC |
923 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
924 | { | |
925 | PKCS7_ISSUER_AND_SERIAL *ias; | |
926 | int ret = 0, i; | |
927 | STACK_OF(X509) *cert; | |
928 | X509 *x509; | |
929 | ||
c225c3cf EK |
930 | if (p7 == NULL) { |
931 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
932 | return 0; | |
933 | } | |
934 | ||
935 | if (p7->d.ptr == NULL) { | |
936 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
937 | return 0; | |
938 | } | |
939 | ||
0f113f3e MC |
940 | if (PKCS7_type_is_signed(p7)) { |
941 | cert = p7->d.sign->cert; | |
942 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
943 | cert = p7->d.signed_and_enveloped->cert; | |
944 | } else { | |
945 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
946 | goto err; | |
947 | } | |
948 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
949 | ias = si->issuer_and_serial; | |
950 | ||
951 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
952 | ||
953 | /* were we able to find the cert in passed to us */ | |
954 | if (x509 == NULL) { | |
955 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
956 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
957 | goto err; | |
958 | } | |
959 | ||
960 | /* Lets verify */ | |
961 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
962 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
963 | goto err; | |
964 | } | |
965 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
966 | i = X509_verify_cert(ctx); | |
967 | if (i <= 0) { | |
968 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
969 | X509_STORE_CTX_cleanup(ctx); | |
970 | goto err; | |
971 | } | |
972 | X509_STORE_CTX_cleanup(ctx); | |
973 | ||
974 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
975 | err: | |
976 | return ret; | |
977 | } | |
170afce5 DSH |
978 | |
979 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
0f113f3e | 980 | X509 *x509) |
dfeab068 | 981 | { |
0f113f3e | 982 | ASN1_OCTET_STRING *os; |
6e59a892 | 983 | EVP_MD_CTX *mdc_tmp, *mdc; |
0f113f3e MC |
984 | int ret = 0, i; |
985 | int md_type; | |
986 | STACK_OF(X509_ATTRIBUTE) *sk; | |
987 | BIO *btmp; | |
988 | EVP_PKEY *pkey; | |
989 | ||
bfb0641f | 990 | mdc_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
991 | if (mdc_tmp == NULL) { |
992 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE); | |
993 | goto err; | |
994 | } | |
0f113f3e MC |
995 | |
996 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
997 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
998 | goto err; | |
999 | } | |
1000 | ||
1001 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
1002 | ||
1003 | btmp = bio; | |
1004 | for (;;) { | |
1005 | if ((btmp == NULL) || | |
1006 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
1007 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1008 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1009 | goto err; | |
1010 | } | |
1011 | BIO_get_md_ctx(btmp, &mdc); | |
1012 | if (mdc == NULL) { | |
1013 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
1014 | goto err; | |
1015 | } | |
1016 | if (EVP_MD_CTX_type(mdc) == md_type) | |
1017 | break; | |
1018 | /* | |
1019 | * Workaround for some broken clients that put the signature OID | |
1020 | * instead of the digest OID in digest_alg->algorithm | |
1021 | */ | |
1022 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
1023 | break; | |
1024 | btmp = BIO_next(btmp); | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * mdc is the digest ctx that we want, unless there are attributes, in | |
1029 | * which case the digest is the signed attributes | |
1030 | */ | |
6e59a892 | 1031 | if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc)) |
0f113f3e MC |
1032 | goto err; |
1033 | ||
1034 | sk = si->auth_attr; | |
1035 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
1036 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
1037 | unsigned int md_len; | |
1038 | int alen; | |
1039 | ASN1_OCTET_STRING *message_digest; | |
1040 | ||
6e59a892 | 1041 | if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len)) |
0f113f3e MC |
1042 | goto err; |
1043 | message_digest = PKCS7_digest_from_attributes(sk); | |
1044 | if (!message_digest) { | |
1045 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1046 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1047 | goto err; | |
1048 | } | |
1049 | if ((message_digest->length != (int)md_len) || | |
1050 | (memcmp(message_digest->data, md_dat, md_len))) { | |
0f113f3e MC |
1051 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1052 | ret = -1; | |
1053 | goto err; | |
1054 | } | |
1055 | ||
6e59a892 | 1056 | if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL)) |
0f113f3e MC |
1057 | goto err; |
1058 | ||
1059 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1060 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1061 | if (alen <= 0) { | |
1062 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1063 | ret = -1; | |
1064 | goto err; | |
1065 | } | |
6e59a892 | 1066 | if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen)) |
0f113f3e MC |
1067 | goto err; |
1068 | ||
1069 | OPENSSL_free(abuf); | |
1070 | } | |
1071 | ||
1072 | os = si->enc_digest; | |
8382fd3a | 1073 | pkey = X509_get0_pubkey(x509); |
0f113f3e MC |
1074 | if (!pkey) { |
1075 | ret = -1; | |
1076 | goto err; | |
1077 | } | |
1078 | ||
6e59a892 | 1079 | i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey); |
0f113f3e MC |
1080 | if (i <= 0) { |
1081 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1082 | ret = -1; | |
1083 | goto err; | |
c5ba2d99 RS |
1084 | } |
1085 | ret = 1; | |
0f113f3e | 1086 | err: |
bfb0641f | 1087 | EVP_MD_CTX_free(mdc_tmp); |
0f113f3e MC |
1088 | return (ret); |
1089 | } | |
d02b48c6 | 1090 | |
6b691a5c | 1091 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
0f113f3e MC |
1092 | { |
1093 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1094 | PKCS7_RECIP_INFO *ri; | |
1095 | int i; | |
1096 | ||
1097 | i = OBJ_obj2nid(p7->type); | |
1098 | if (i != NID_pkcs7_signedAndEnveloped) | |
1099 | return NULL; | |
1100 | if (p7->d.signed_and_enveloped == NULL) | |
1101 | return NULL; | |
1102 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1103 | if (rsk == NULL) | |
1104 | return NULL; | |
0f113f3e MC |
1105 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) |
1106 | return (NULL); | |
1107 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1108 | return (ri->issuer_and_serial); | |
1109 | } | |
dfeab068 | 1110 | |
6b691a5c | 1111 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1112 | { |
1113 | return (get_attribute(si->auth_attr, nid)); | |
1114 | } | |
dfeab068 | 1115 | |
6b691a5c | 1116 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1117 | { |
1118 | return (get_attribute(si->unauth_attr, nid)); | |
1119 | } | |
dfeab068 | 1120 | |
b6436ff2 | 1121 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
0f113f3e | 1122 | { |
9b0a4531 | 1123 | int idx; |
0f113f3e | 1124 | X509_ATTRIBUTE *xa; |
9b0a4531 DSH |
1125 | idx = X509at_get_attr_by_NID(sk, nid, -1); |
1126 | xa = X509at_get_attr(sk, idx); | |
1127 | return X509_ATTRIBUTE_get0_type(xa, 0); | |
0f113f3e | 1128 | } |
dfeab068 | 1129 | |
b6436ff2 | 1130 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1131 | { |
0f113f3e | 1132 | ASN1_TYPE *astype; |
75ebbd9a | 1133 | if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL) |
0f113f3e MC |
1134 | return NULL; |
1135 | return astype->value.octet_string; | |
10243d97 | 1136 | } |
dfeab068 | 1137 | |
b6436ff2 | 1138 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
0f113f3e MC |
1139 | STACK_OF(X509_ATTRIBUTE) *sk) |
1140 | { | |
1141 | int i; | |
1142 | ||
222561fe | 1143 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1144 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1145 | if (p7si->auth_attr == NULL) | |
1146 | return 0; | |
1147 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1148 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1149 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1150 | (sk, i)))) | |
1151 | == NULL) | |
1152 | return (0); | |
1153 | } | |
1154 | return (1); | |
1155 | } | |
1156 | ||
1157 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1158 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1159 | { | |
1160 | int i; | |
1161 | ||
222561fe | 1162 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1163 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1164 | if (p7si->unauth_attr == NULL) | |
1165 | return 0; | |
1166 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1167 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1168 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1169 | (sk, i)))) | |
1170 | == NULL) | |
1171 | return (0); | |
1172 | } | |
1173 | return (1); | |
1174 | } | |
dfeab068 | 1175 | |
6b691a5c | 1176 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1177 | void *value) |
1178 | { | |
1179 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1180 | } | |
dfeab068 | 1181 | |
6b691a5c | 1182 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1183 | void *value) |
1184 | { | |
1185 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1186 | } | |
dfeab068 | 1187 | |
b6436ff2 | 1188 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e MC |
1189 | void *value) |
1190 | { | |
1191 | X509_ATTRIBUTE *attr = NULL; | |
1192 | ||
1193 | if (*sk == NULL) { | |
75ebbd9a | 1194 | if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL) |
0f113f3e MC |
1195 | return 0; |
1196 | new_attrib: | |
75ebbd9a | 1197 | if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL) |
0f113f3e MC |
1198 | return 0; |
1199 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1200 | X509_ATTRIBUTE_free(attr); | |
1201 | return 0; | |
1202 | } | |
1203 | } else { | |
1204 | int i; | |
1205 | ||
1206 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1207 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
9b0a4531 | 1208 | if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) { |
0f113f3e MC |
1209 | X509_ATTRIBUTE_free(attr); |
1210 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1211 | if (attr == NULL) | |
1212 | return 0; | |
1213 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1214 | X509_ATTRIBUTE_free(attr); | |
1215 | return 0; | |
1216 | } | |
1217 | goto end; | |
1218 | } | |
1219 | } | |
1220 | goto new_attrib; | |
1221 | } | |
1222 | end: | |
1223 | return (1); | |
1224 | } |