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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> | |
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> |
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); | |
0f113f3e MC |
184 | if (ek) |
185 | OPENSSL_free(ek); | |
186 | return ret; | |
399a6f0b | 187 | |
0f113f3e | 188 | } |
399a6f0b | 189 | |
777c47ac | 190 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
0f113f3e MC |
191 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
192 | { | |
193 | EVP_PKEY_CTX *pctx = NULL; | |
194 | unsigned char *ek = NULL; | |
195 | size_t eklen; | |
196 | ||
197 | int ret = -1; | |
198 | ||
199 | pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
200 | if (!pctx) | |
201 | return -1; | |
202 | ||
203 | if (EVP_PKEY_decrypt_init(pctx) <= 0) | |
204 | goto err; | |
205 | ||
206 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, | |
207 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { | |
208 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); | |
209 | goto err; | |
210 | } | |
211 | ||
212 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, | |
213 | ri->enc_key->data, ri->enc_key->length) <= 0) | |
214 | goto err; | |
215 | ||
216 | ek = OPENSSL_malloc(eklen); | |
217 | ||
218 | if (ek == NULL) { | |
219 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); | |
220 | goto err; | |
221 | } | |
222 | ||
223 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, | |
224 | ri->enc_key->data, ri->enc_key->length) <= 0) { | |
225 | ret = 0; | |
226 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); | |
227 | goto err; | |
228 | } | |
229 | ||
230 | ret = 1; | |
231 | ||
4b45c6e5 | 232 | OPENSSL_clear_free(*pek, *peklen); |
0f113f3e MC |
233 | *pek = ek; |
234 | *peklen = eklen; | |
235 | ||
236 | err: | |
c5ba2d99 | 237 | EVP_PKEY_CTX_free(pctx); |
0f113f3e MC |
238 | if (!ret && ek) |
239 | OPENSSL_free(ek); | |
240 | ||
241 | return ret; | |
242 | } | |
399a6f0b | 243 | |
6b691a5c | 244 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
245 | { |
246 | int i; | |
247 | BIO *out = NULL, *btmp = NULL; | |
248 | X509_ALGOR *xa = NULL; | |
249 | const EVP_CIPHER *evp_cipher = NULL; | |
250 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
251 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
252 | X509_ALGOR *xalg = NULL; | |
253 | PKCS7_RECIP_INFO *ri = NULL; | |
254 | ASN1_OCTET_STRING *os = NULL; | |
255 | ||
c225c3cf EK |
256 | if (p7 == NULL) { |
257 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
258 | return NULL; | |
259 | } | |
260 | /* | |
261 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
262 | * only applies to inner content (precisely, detached signatures). | |
263 | * | |
264 | * When reading content, missing outer content is therefore treated as an | |
265 | * error. | |
266 | * | |
267 | * When creating content, PKCS7_content_new() must be called before | |
268 | * calling this method, so a NULL p7->d is always an error. | |
269 | */ | |
270 | if (p7->d.ptr == NULL) { | |
271 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
272 | return NULL; | |
273 | } | |
274 | ||
0f113f3e MC |
275 | i = OBJ_obj2nid(p7->type); |
276 | p7->state = PKCS7_S_HEADER; | |
277 | ||
278 | switch (i) { | |
279 | case NID_pkcs7_signed: | |
280 | md_sk = p7->d.sign->md_algs; | |
281 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
282 | break; | |
283 | case NID_pkcs7_signedAndEnveloped: | |
284 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
285 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
286 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
287 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
288 | if (evp_cipher == NULL) { | |
289 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
290 | goto err; | |
291 | } | |
292 | break; | |
293 | case NID_pkcs7_enveloped: | |
294 | rsk = p7->d.enveloped->recipientinfo; | |
295 | xalg = p7->d.enveloped->enc_data->algorithm; | |
296 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
297 | if (evp_cipher == NULL) { | |
298 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
299 | goto err; | |
300 | } | |
301 | break; | |
302 | case NID_pkcs7_digest: | |
303 | xa = p7->d.digest->md; | |
304 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
305 | break; | |
306 | case NID_pkcs7_data: | |
307 | break; | |
308 | default: | |
309 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
310 | goto err; | |
311 | } | |
312 | ||
313 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
314 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
315 | goto err; | |
316 | ||
317 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
318 | goto err; | |
319 | ||
320 | if (evp_cipher != NULL) { | |
321 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
322 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
323 | int keylen, ivlen; | |
324 | EVP_CIPHER_CTX *ctx; | |
325 | ||
326 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
327 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
328 | goto err; | |
329 | } | |
330 | BIO_get_cipher_ctx(btmp, &ctx); | |
331 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
332 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
333 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
334 | if (ivlen > 0) | |
266483d2 | 335 | if (RAND_bytes(iv, ivlen) <= 0) |
0f113f3e MC |
336 | goto err; |
337 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
338 | goto err; | |
339 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
340 | goto err; | |
341 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
342 | goto err; | |
343 | ||
344 | if (ivlen > 0) { | |
345 | if (xalg->parameter == NULL) { | |
346 | xalg->parameter = ASN1_TYPE_new(); | |
347 | if (xalg->parameter == NULL) | |
348 | goto err; | |
349 | } | |
350 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
351 | goto err; | |
352 | } | |
353 | ||
354 | /* Lets do the pub key stuff :-) */ | |
355 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
356 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
357 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
358 | goto err; | |
359 | } | |
360 | OPENSSL_cleanse(key, keylen); | |
361 | ||
362 | if (out == NULL) | |
363 | out = btmp; | |
364 | else | |
365 | BIO_push(out, btmp); | |
366 | btmp = NULL; | |
367 | } | |
368 | ||
369 | if (bio == NULL) { | |
370 | if (PKCS7_is_detached(p7)) | |
371 | bio = BIO_new(BIO_s_null()); | |
372 | else if (os && os->length > 0) | |
373 | bio = BIO_new_mem_buf(os->data, os->length); | |
374 | if (bio == NULL) { | |
375 | bio = BIO_new(BIO_s_mem()); | |
376 | if (bio == NULL) | |
377 | goto err; | |
378 | BIO_set_mem_eof_return(bio, 0); | |
379 | } | |
380 | } | |
381 | if (out) | |
382 | BIO_push(out, bio); | |
383 | else | |
384 | out = bio; | |
ca3a82c3 RS |
385 | return out; |
386 | ||
0f113f3e | 387 | err: |
ca3a82c3 RS |
388 | BIO_free_all(out); |
389 | BIO_free_all(btmp); | |
390 | return NULL; | |
0f113f3e | 391 | } |
dfeab068 | 392 | |
8f2e4fdf | 393 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
0f113f3e MC |
394 | { |
395 | int ret; | |
396 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
397 | pcert->cert_info->issuer); | |
398 | if (ret) | |
399 | return ret; | |
f422a514 | 400 | return ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, |
0f113f3e MC |
401 | ri->issuer_and_serial->serial); |
402 | } | |
8f2e4fdf | 403 | |
dfeab068 | 404 | /* int */ |
84fa704c | 405 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
0f113f3e MC |
406 | { |
407 | int i, j; | |
408 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
409 | X509_ALGOR *xa; | |
410 | ASN1_OCTET_STRING *data_body = NULL; | |
411 | const EVP_MD *evp_md; | |
412 | const EVP_CIPHER *evp_cipher = NULL; | |
413 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
414 | X509_ALGOR *enc_alg = NULL; | |
415 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
416 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
417 | PKCS7_RECIP_INFO *ri = NULL; | |
418 | unsigned char *ek = NULL, *tkey = NULL; | |
419 | int eklen = 0, tkeylen = 0; | |
420 | ||
c225c3cf EK |
421 | if (p7 == NULL) { |
422 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
423 | return NULL; | |
424 | } | |
425 | ||
426 | if (p7->d.ptr == NULL) { | |
427 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
428 | return NULL; | |
429 | } | |
430 | ||
0f113f3e MC |
431 | i = OBJ_obj2nid(p7->type); |
432 | p7->state = PKCS7_S_HEADER; | |
433 | ||
434 | switch (i) { | |
435 | case NID_pkcs7_signed: | |
436 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); | |
437 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
438 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
439 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
440 | goto err; | |
441 | } | |
442 | md_sk = p7->d.sign->md_algs; | |
443 | break; | |
444 | case NID_pkcs7_signedAndEnveloped: | |
445 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
446 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
447 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; | |
448 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
449 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
450 | if (evp_cipher == NULL) { | |
451 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
452 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
453 | goto err; | |
454 | } | |
455 | break; | |
456 | case NID_pkcs7_enveloped: | |
457 | rsk = p7->d.enveloped->recipientinfo; | |
458 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
459 | data_body = p7->d.enveloped->enc_data->enc_data; | |
460 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
461 | if (evp_cipher == NULL) { | |
462 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
463 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
464 | goto err; | |
465 | } | |
466 | break; | |
467 | default: | |
468 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
469 | goto err; | |
470 | } | |
471 | ||
472 | /* We will be checking the signature */ | |
473 | if (md_sk != NULL) { | |
474 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
475 | xa = sk_X509_ALGOR_value(md_sk, i); | |
476 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
477 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
478 | goto err; | |
479 | } | |
480 | ||
481 | j = OBJ_obj2nid(xa->algorithm); | |
482 | evp_md = EVP_get_digestbynid(j); | |
483 | if (evp_md == NULL) { | |
484 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
485 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
486 | goto err; | |
487 | } | |
488 | ||
489 | BIO_set_md(btmp, evp_md); | |
490 | if (out == NULL) | |
491 | out = btmp; | |
492 | else | |
493 | BIO_push(out, btmp); | |
494 | btmp = NULL; | |
495 | } | |
496 | } | |
497 | ||
498 | if (evp_cipher != NULL) { | |
0f113f3e MC |
499 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
500 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
501 | goto err; | |
502 | } | |
503 | ||
504 | /* | |
505 | * It was encrypted, we need to decrypt the secret key with the | |
506 | * private key | |
507 | */ | |
508 | ||
509 | /* | |
510 | * Find the recipientInfo which matches the passed certificate (if | |
511 | * any) | |
512 | */ | |
513 | ||
514 | if (pcert) { | |
515 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
516 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
517 | if (!pkcs7_cmp_ri(ri, pcert)) | |
518 | break; | |
519 | ri = NULL; | |
520 | } | |
521 | if (ri == NULL) { | |
522 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
523 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
524 | goto err; | |
525 | } | |
526 | } | |
527 | ||
528 | /* If we haven't got a certificate try each ri in turn */ | |
529 | if (pcert == NULL) { | |
530 | /* | |
531 | * Always attempt to decrypt all rinfo even after success as a | |
532 | * defence against MMA timing attacks. | |
533 | */ | |
534 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
535 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
536 | ||
537 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
538 | goto err; | |
539 | ERR_clear_error(); | |
540 | } | |
541 | } else { | |
542 | /* Only exit on fatal errors, not decrypt failure */ | |
543 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
544 | goto err; | |
545 | ERR_clear_error(); | |
546 | } | |
547 | ||
548 | evp_ctx = NULL; | |
549 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
550 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
551 | goto err; | |
552 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
553 | goto err; | |
554 | /* Generate random key as MMA defence */ | |
555 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
556 | tkey = OPENSSL_malloc(tkeylen); | |
557 | if (!tkey) | |
558 | goto err; | |
559 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
560 | goto err; | |
561 | if (ek == NULL) { | |
562 | ek = tkey; | |
563 | eklen = tkeylen; | |
564 | tkey = NULL; | |
565 | } | |
566 | ||
567 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
568 | /* | |
569 | * Some S/MIME clients don't use the same key and effective key | |
570 | * length. The key length is determined by the size of the | |
571 | * decrypted RSA key. | |
572 | */ | |
573 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
574 | /* Use random key as MMA defence */ | |
4b45c6e5 | 575 | OPENSSL_clear_free(ek, eklen); |
0f113f3e MC |
576 | ek = tkey; |
577 | eklen = tkeylen; | |
578 | tkey = NULL; | |
579 | } | |
580 | } | |
581 | /* Clear errors so we don't leak information useful in MMA */ | |
582 | ERR_clear_error(); | |
583 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
584 | goto err; | |
585 | ||
4b45c6e5 RS |
586 | OPENSSL_clear_free(ek, eklen); |
587 | ek = NULL; | |
588 | OPENSSL_clear_free(tkey, tkeylen); | |
589 | tkey = NULL; | |
0f113f3e MC |
590 | |
591 | if (out == NULL) | |
592 | out = etmp; | |
593 | else | |
594 | BIO_push(out, etmp); | |
595 | etmp = NULL; | |
596 | } | |
0f113f3e MC |
597 | if (PKCS7_is_detached(p7) || (in_bio != NULL)) { |
598 | bio = in_bio; | |
599 | } else { | |
0f113f3e MC |
600 | if (data_body->length > 0) |
601 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
602 | else { | |
603 | bio = BIO_new(BIO_s_mem()); | |
604 | BIO_set_mem_eof_return(bio, 0); | |
605 | } | |
606 | if (bio == NULL) | |
607 | goto err; | |
0f113f3e MC |
608 | } |
609 | BIO_push(out, bio); | |
610 | bio = NULL; | |
4b45c6e5 RS |
611 | return out; |
612 | ||
0f113f3e | 613 | err: |
4b45c6e5 RS |
614 | OPENSSL_clear_free(ek, eklen); |
615 | OPENSSL_clear_free(tkey, tkeylen); | |
616 | BIO_free_all(out); | |
617 | BIO_free_all(btmp); | |
618 | BIO_free_all(etmp); | |
619 | BIO_free_all(bio); | |
620 | return NULL; | |
0f113f3e | 621 | } |
d02b48c6 | 622 | |
c5a55463 | 623 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
0f113f3e MC |
624 | { |
625 | for (;;) { | |
626 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
627 | if (bio == NULL) { | |
628 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
629 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
630 | return NULL; | |
631 | } | |
632 | BIO_get_md_ctx(bio, pmd); | |
633 | if (*pmd == NULL) { | |
634 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
635 | return NULL; | |
636 | } | |
637 | if (EVP_MD_CTX_type(*pmd) == nid) | |
638 | return bio; | |
639 | bio = BIO_next(bio); | |
640 | } | |
641 | return NULL; | |
642 | } | |
c5a55463 | 643 | |
76fa8f18 | 644 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
0f113f3e MC |
645 | { |
646 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
647 | unsigned int md_len; | |
648 | ||
649 | /* Add signing time if not already present */ | |
650 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
651 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
652 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
653 | return 0; | |
654 | } | |
655 | } | |
656 | ||
657 | /* Add digest */ | |
658 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
659 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
660 | return 0; | |
661 | } | |
662 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
663 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
664 | return 0; | |
665 | } | |
666 | ||
667 | /* Now sign the attributes */ | |
668 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
669 | return 0; | |
670 | ||
671 | return 1; | |
672 | } | |
673 | ||
6b691a5c | 674 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
675 | { |
676 | int ret = 0; | |
677 | int i, j; | |
678 | BIO *btmp; | |
679 | PKCS7_SIGNER_INFO *si; | |
680 | EVP_MD_CTX *mdc, ctx_tmp; | |
681 | STACK_OF(X509_ATTRIBUTE) *sk; | |
682 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
683 | ASN1_OCTET_STRING *os = NULL; | |
684 | ||
c225c3cf EK |
685 | if (p7 == NULL) { |
686 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
687 | return 0; | |
688 | } | |
689 | ||
690 | if (p7->d.ptr == NULL) { | |
691 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
692 | return 0; | |
693 | } | |
694 | ||
0f113f3e MC |
695 | EVP_MD_CTX_init(&ctx_tmp); |
696 | i = OBJ_obj2nid(p7->type); | |
697 | p7->state = PKCS7_S_HEADER; | |
698 | ||
699 | switch (i) { | |
700 | case NID_pkcs7_data: | |
701 | os = p7->d.data; | |
702 | break; | |
703 | case NID_pkcs7_signedAndEnveloped: | |
704 | /* XXXXXXXXXXXXXXXX */ | |
705 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
706 | os = p7->d.signed_and_enveloped->enc_data->enc_data; | |
707 | if (!os) { | |
f422a514 | 708 | os = ASN1_OCTET_STRING_new(); |
0f113f3e MC |
709 | if (!os) { |
710 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
711 | goto err; | |
712 | } | |
713 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
714 | } | |
715 | break; | |
716 | case NID_pkcs7_enveloped: | |
717 | /* XXXXXXXXXXXXXXXX */ | |
718 | os = p7->d.enveloped->enc_data->enc_data; | |
719 | if (!os) { | |
f422a514 | 720 | os = ASN1_OCTET_STRING_new(); |
0f113f3e MC |
721 | if (!os) { |
722 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
723 | goto err; | |
724 | } | |
725 | p7->d.enveloped->enc_data->enc_data = os; | |
726 | } | |
727 | break; | |
728 | case NID_pkcs7_signed: | |
729 | si_sk = p7->d.sign->signer_info; | |
730 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
731 | /* If detached data then the content is excluded */ | |
732 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
f422a514 | 733 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 734 | os = NULL; |
0f113f3e MC |
735 | p7->d.sign->contents->d.data = NULL; |
736 | } | |
737 | break; | |
738 | ||
739 | case NID_pkcs7_digest: | |
740 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
741 | /* If detached data then the content is excluded */ | |
742 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
f422a514 | 743 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 744 | os = NULL; |
0f113f3e MC |
745 | p7->d.digest->contents->d.data = NULL; |
746 | } | |
747 | break; | |
748 | ||
749 | default: | |
750 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
751 | goto err; | |
752 | } | |
753 | ||
754 | if (si_sk != NULL) { | |
755 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
756 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
757 | if (si->pkey == NULL) | |
758 | continue; | |
759 | ||
760 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
761 | ||
762 | btmp = bio; | |
763 | ||
764 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
765 | ||
766 | if (btmp == NULL) | |
767 | goto err; | |
768 | ||
769 | /* | |
770 | * We now have the EVP_MD_CTX, lets do the signing. | |
771 | */ | |
772 | if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc)) | |
773 | goto err; | |
774 | ||
775 | sk = si->auth_attr; | |
776 | ||
777 | /* | |
778 | * If there are attributes, we add the digest attribute and only | |
779 | * sign the attributes | |
780 | */ | |
781 | if (sk_X509_ATTRIBUTE_num(sk) > 0) { | |
782 | if (!do_pkcs7_signed_attrib(si, &ctx_tmp)) | |
783 | goto err; | |
784 | } else { | |
785 | unsigned char *abuf = NULL; | |
786 | unsigned int abuflen; | |
787 | abuflen = EVP_PKEY_size(si->pkey); | |
788 | abuf = OPENSSL_malloc(abuflen); | |
789 | if (!abuf) | |
790 | goto err; | |
791 | ||
792 | if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) { | |
793 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); | |
794 | goto err; | |
795 | } | |
796 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); | |
797 | } | |
798 | } | |
799 | } else if (i == NID_pkcs7_digest) { | |
800 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
801 | unsigned int md_len; | |
802 | if (!PKCS7_find_digest(&mdc, bio, | |
803 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
804 | goto err; | |
805 | if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) | |
806 | goto err; | |
f422a514 | 807 | ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); |
0f113f3e MC |
808 | } |
809 | ||
c225c3cf | 810 | if (!PKCS7_is_detached(p7)) { |
0f113f3e | 811 | /* |
c225c3cf EK |
812 | * NOTE(emilia): I think we only reach os == NULL here because detached |
813 | * digested data support is broken. | |
0f113f3e | 814 | */ |
c225c3cf EK |
815 | if (os == NULL) |
816 | goto err; | |
817 | if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { | |
818 | char *cont; | |
819 | long contlen; | |
820 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); | |
821 | if (btmp == NULL) { | |
822 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
823 | goto err; | |
824 | } | |
825 | contlen = BIO_get_mem_data(btmp, &cont); | |
826 | /* | |
827 | * Mark the BIO read only then we can use its copy of the data | |
828 | * instead of making an extra copy. | |
829 | */ | |
830 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
831 | BIO_set_mem_eof_return(btmp, 0); | |
832 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); | |
833 | } | |
0f113f3e MC |
834 | } |
835 | ret = 1; | |
836 | err: | |
837 | EVP_MD_CTX_cleanup(&ctx_tmp); | |
838 | return (ret); | |
839 | } | |
d02b48c6 | 840 | |
76fa8f18 | 841 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
0f113f3e MC |
842 | { |
843 | EVP_MD_CTX mctx; | |
844 | EVP_PKEY_CTX *pctx; | |
845 | unsigned char *abuf = NULL; | |
846 | int alen; | |
847 | size_t siglen; | |
848 | const EVP_MD *md = NULL; | |
849 | ||
850 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); | |
851 | if (md == NULL) | |
852 | return 0; | |
853 | ||
854 | EVP_MD_CTX_init(&mctx); | |
855 | if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) | |
856 | goto err; | |
857 | ||
858 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
859 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
860 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
861 | goto err; | |
862 | } | |
863 | ||
864 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
865 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
866 | if (!abuf) | |
867 | goto err; | |
868 | if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0) | |
869 | goto err; | |
870 | OPENSSL_free(abuf); | |
871 | abuf = NULL; | |
872 | if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) | |
873 | goto err; | |
874 | abuf = OPENSSL_malloc(siglen); | |
875 | if (!abuf) | |
876 | goto err; | |
877 | if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) | |
878 | goto err; | |
879 | ||
880 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
881 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
882 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
883 | goto err; | |
884 | } | |
885 | ||
886 | EVP_MD_CTX_cleanup(&mctx); | |
887 | ||
888 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
889 | ||
890 | return 1; | |
891 | ||
892 | err: | |
893 | if (abuf) | |
894 | OPENSSL_free(abuf); | |
895 | EVP_MD_CTX_cleanup(&mctx); | |
896 | return 0; | |
897 | ||
898 | } | |
76fa8f18 | 899 | |
6b691a5c | 900 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
0f113f3e MC |
901 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
902 | { | |
903 | PKCS7_ISSUER_AND_SERIAL *ias; | |
904 | int ret = 0, i; | |
905 | STACK_OF(X509) *cert; | |
906 | X509 *x509; | |
907 | ||
c225c3cf EK |
908 | if (p7 == NULL) { |
909 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
910 | return 0; | |
911 | } | |
912 | ||
913 | if (p7->d.ptr == NULL) { | |
914 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
915 | return 0; | |
916 | } | |
917 | ||
0f113f3e MC |
918 | if (PKCS7_type_is_signed(p7)) { |
919 | cert = p7->d.sign->cert; | |
920 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
921 | cert = p7->d.signed_and_enveloped->cert; | |
922 | } else { | |
923 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
924 | goto err; | |
925 | } | |
926 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
927 | ias = si->issuer_and_serial; | |
928 | ||
929 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
930 | ||
931 | /* were we able to find the cert in passed to us */ | |
932 | if (x509 == NULL) { | |
933 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
934 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
935 | goto err; | |
936 | } | |
937 | ||
938 | /* Lets verify */ | |
939 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
940 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
941 | goto err; | |
942 | } | |
943 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
944 | i = X509_verify_cert(ctx); | |
945 | if (i <= 0) { | |
946 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
947 | X509_STORE_CTX_cleanup(ctx); | |
948 | goto err; | |
949 | } | |
950 | X509_STORE_CTX_cleanup(ctx); | |
951 | ||
952 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
953 | err: | |
954 | return ret; | |
955 | } | |
170afce5 DSH |
956 | |
957 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
0f113f3e | 958 | X509 *x509) |
dfeab068 | 959 | { |
0f113f3e MC |
960 | ASN1_OCTET_STRING *os; |
961 | EVP_MD_CTX mdc_tmp, *mdc; | |
962 | int ret = 0, i; | |
963 | int md_type; | |
964 | STACK_OF(X509_ATTRIBUTE) *sk; | |
965 | BIO *btmp; | |
966 | EVP_PKEY *pkey; | |
967 | ||
968 | EVP_MD_CTX_init(&mdc_tmp); | |
969 | ||
970 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
971 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
972 | goto err; | |
973 | } | |
974 | ||
975 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
976 | ||
977 | btmp = bio; | |
978 | for (;;) { | |
979 | if ((btmp == NULL) || | |
980 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
981 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
982 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
983 | goto err; | |
984 | } | |
985 | BIO_get_md_ctx(btmp, &mdc); | |
986 | if (mdc == NULL) { | |
987 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
988 | goto err; | |
989 | } | |
990 | if (EVP_MD_CTX_type(mdc) == md_type) | |
991 | break; | |
992 | /* | |
993 | * Workaround for some broken clients that put the signature OID | |
994 | * instead of the digest OID in digest_alg->algorithm | |
995 | */ | |
996 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
997 | break; | |
998 | btmp = BIO_next(btmp); | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * mdc is the digest ctx that we want, unless there are attributes, in | |
1003 | * which case the digest is the signed attributes | |
1004 | */ | |
1005 | if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc)) | |
1006 | goto err; | |
1007 | ||
1008 | sk = si->auth_attr; | |
1009 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
1010 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
1011 | unsigned int md_len; | |
1012 | int alen; | |
1013 | ASN1_OCTET_STRING *message_digest; | |
1014 | ||
1015 | if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len)) | |
1016 | goto err; | |
1017 | message_digest = PKCS7_digest_from_attributes(sk); | |
1018 | if (!message_digest) { | |
1019 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1020 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1021 | goto err; | |
1022 | } | |
1023 | if ((message_digest->length != (int)md_len) || | |
1024 | (memcmp(message_digest->data, md_dat, md_len))) { | |
0f113f3e MC |
1025 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1026 | ret = -1; | |
1027 | goto err; | |
1028 | } | |
1029 | ||
1030 | if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL)) | |
1031 | goto err; | |
1032 | ||
1033 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1034 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1035 | if (alen <= 0) { | |
1036 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1037 | ret = -1; | |
1038 | goto err; | |
1039 | } | |
1040 | if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)) | |
1041 | goto err; | |
1042 | ||
1043 | OPENSSL_free(abuf); | |
1044 | } | |
1045 | ||
1046 | os = si->enc_digest; | |
1047 | pkey = X509_get_pubkey(x509); | |
1048 | if (!pkey) { | |
1049 | ret = -1; | |
1050 | goto err; | |
1051 | } | |
1052 | ||
1053 | i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey); | |
1054 | EVP_PKEY_free(pkey); | |
1055 | if (i <= 0) { | |
1056 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1057 | ret = -1; | |
1058 | goto err; | |
c5ba2d99 RS |
1059 | } |
1060 | ret = 1; | |
0f113f3e MC |
1061 | err: |
1062 | EVP_MD_CTX_cleanup(&mdc_tmp); | |
1063 | return (ret); | |
1064 | } | |
d02b48c6 | 1065 | |
6b691a5c | 1066 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
0f113f3e MC |
1067 | { |
1068 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1069 | PKCS7_RECIP_INFO *ri; | |
1070 | int i; | |
1071 | ||
1072 | i = OBJ_obj2nid(p7->type); | |
1073 | if (i != NID_pkcs7_signedAndEnveloped) | |
1074 | return NULL; | |
1075 | if (p7->d.signed_and_enveloped == NULL) | |
1076 | return NULL; | |
1077 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1078 | if (rsk == NULL) | |
1079 | return NULL; | |
1080 | ri = sk_PKCS7_RECIP_INFO_value(rsk, 0); | |
1081 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) | |
1082 | return (NULL); | |
1083 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1084 | return (ri->issuer_and_serial); | |
1085 | } | |
dfeab068 | 1086 | |
6b691a5c | 1087 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1088 | { |
1089 | return (get_attribute(si->auth_attr, nid)); | |
1090 | } | |
dfeab068 | 1091 | |
6b691a5c | 1092 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1093 | { |
1094 | return (get_attribute(si->unauth_attr, nid)); | |
1095 | } | |
dfeab068 | 1096 | |
b6436ff2 | 1097 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
0f113f3e | 1098 | { |
9b0a4531 | 1099 | int idx; |
0f113f3e | 1100 | X509_ATTRIBUTE *xa; |
9b0a4531 DSH |
1101 | idx = X509at_get_attr_by_NID(sk, nid, -1); |
1102 | xa = X509at_get_attr(sk, idx); | |
1103 | return X509_ATTRIBUTE_get0_type(xa, 0); | |
0f113f3e | 1104 | } |
dfeab068 | 1105 | |
b6436ff2 | 1106 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1107 | { |
0f113f3e MC |
1108 | ASN1_TYPE *astype; |
1109 | if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) | |
1110 | return NULL; | |
1111 | return astype->value.octet_string; | |
10243d97 | 1112 | } |
dfeab068 | 1113 | |
b6436ff2 | 1114 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
0f113f3e MC |
1115 | STACK_OF(X509_ATTRIBUTE) *sk) |
1116 | { | |
1117 | int i; | |
1118 | ||
222561fe | 1119 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1120 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1121 | if (p7si->auth_attr == NULL) | |
1122 | return 0; | |
1123 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1124 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1125 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1126 | (sk, i)))) | |
1127 | == NULL) | |
1128 | return (0); | |
1129 | } | |
1130 | return (1); | |
1131 | } | |
1132 | ||
1133 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1134 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1135 | { | |
1136 | int i; | |
1137 | ||
222561fe | 1138 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1139 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1140 | if (p7si->unauth_attr == NULL) | |
1141 | return 0; | |
1142 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1143 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1144 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1145 | (sk, i)))) | |
1146 | == NULL) | |
1147 | return (0); | |
1148 | } | |
1149 | return (1); | |
1150 | } | |
dfeab068 | 1151 | |
6b691a5c | 1152 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1153 | void *value) |
1154 | { | |
1155 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1156 | } | |
dfeab068 | 1157 | |
6b691a5c | 1158 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1159 | void *value) |
1160 | { | |
1161 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1162 | } | |
dfeab068 | 1163 | |
b6436ff2 | 1164 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e MC |
1165 | void *value) |
1166 | { | |
1167 | X509_ATTRIBUTE *attr = NULL; | |
1168 | ||
1169 | if (*sk == NULL) { | |
1170 | *sk = sk_X509_ATTRIBUTE_new_null(); | |
1171 | if (*sk == NULL) | |
1172 | return 0; | |
1173 | new_attrib: | |
1174 | if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value))) | |
1175 | return 0; | |
1176 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1177 | X509_ATTRIBUTE_free(attr); | |
1178 | return 0; | |
1179 | } | |
1180 | } else { | |
1181 | int i; | |
1182 | ||
1183 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1184 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
9b0a4531 | 1185 | if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) { |
0f113f3e MC |
1186 | X509_ATTRIBUTE_free(attr); |
1187 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1188 | if (attr == NULL) | |
1189 | return 0; | |
1190 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1191 | X509_ATTRIBUTE_free(attr); | |
1192 | return 0; | |
1193 | } | |
1194 | goto end; | |
1195 | } | |
1196 | } | |
1197 | goto new_attrib; | |
1198 | } | |
1199 | end: | |
1200 | return (1); | |
1201 | } |