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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 | ||
232 | if (*pek) { | |
233 | OPENSSL_cleanse(*pek, *peklen); | |
234 | OPENSSL_free(*pek); | |
235 | } | |
236 | ||
237 | *pek = ek; | |
238 | *peklen = eklen; | |
239 | ||
240 | err: | |
c5ba2d99 | 241 | EVP_PKEY_CTX_free(pctx); |
0f113f3e MC |
242 | if (!ret && ek) |
243 | OPENSSL_free(ek); | |
244 | ||
245 | return ret; | |
246 | } | |
399a6f0b | 247 | |
6b691a5c | 248 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
249 | { |
250 | int i; | |
251 | BIO *out = NULL, *btmp = NULL; | |
252 | X509_ALGOR *xa = NULL; | |
253 | const EVP_CIPHER *evp_cipher = NULL; | |
254 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
255 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
256 | X509_ALGOR *xalg = NULL; | |
257 | PKCS7_RECIP_INFO *ri = NULL; | |
258 | ASN1_OCTET_STRING *os = NULL; | |
259 | ||
c225c3cf EK |
260 | if (p7 == NULL) { |
261 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
262 | return NULL; | |
263 | } | |
264 | /* | |
265 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
266 | * only applies to inner content (precisely, detached signatures). | |
267 | * | |
268 | * When reading content, missing outer content is therefore treated as an | |
269 | * error. | |
270 | * | |
271 | * When creating content, PKCS7_content_new() must be called before | |
272 | * calling this method, so a NULL p7->d is always an error. | |
273 | */ | |
274 | if (p7->d.ptr == NULL) { | |
275 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
276 | return NULL; | |
277 | } | |
278 | ||
0f113f3e MC |
279 | i = OBJ_obj2nid(p7->type); |
280 | p7->state = PKCS7_S_HEADER; | |
281 | ||
282 | switch (i) { | |
283 | case NID_pkcs7_signed: | |
284 | md_sk = p7->d.sign->md_algs; | |
285 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
286 | break; | |
287 | case NID_pkcs7_signedAndEnveloped: | |
288 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
289 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
290 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
291 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
292 | if (evp_cipher == NULL) { | |
293 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
294 | goto err; | |
295 | } | |
296 | break; | |
297 | case NID_pkcs7_enveloped: | |
298 | rsk = p7->d.enveloped->recipientinfo; | |
299 | xalg = p7->d.enveloped->enc_data->algorithm; | |
300 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
301 | if (evp_cipher == NULL) { | |
302 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
303 | goto err; | |
304 | } | |
305 | break; | |
306 | case NID_pkcs7_digest: | |
307 | xa = p7->d.digest->md; | |
308 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
309 | break; | |
310 | case NID_pkcs7_data: | |
311 | break; | |
312 | default: | |
313 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
314 | goto err; | |
315 | } | |
316 | ||
317 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
318 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
319 | goto err; | |
320 | ||
321 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
322 | goto err; | |
323 | ||
324 | if (evp_cipher != NULL) { | |
325 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
326 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
327 | int keylen, ivlen; | |
328 | EVP_CIPHER_CTX *ctx; | |
329 | ||
330 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
331 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
332 | goto err; | |
333 | } | |
334 | BIO_get_cipher_ctx(btmp, &ctx); | |
335 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
336 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
337 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
338 | if (ivlen > 0) | |
266483d2 | 339 | if (RAND_bytes(iv, ivlen) <= 0) |
0f113f3e MC |
340 | goto err; |
341 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
342 | goto err; | |
343 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
344 | goto err; | |
345 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
346 | goto err; | |
347 | ||
348 | if (ivlen > 0) { | |
349 | if (xalg->parameter == NULL) { | |
350 | xalg->parameter = ASN1_TYPE_new(); | |
351 | if (xalg->parameter == NULL) | |
352 | goto err; | |
353 | } | |
354 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
355 | goto err; | |
356 | } | |
357 | ||
358 | /* Lets do the pub key stuff :-) */ | |
359 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
360 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
361 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
362 | goto err; | |
363 | } | |
364 | OPENSSL_cleanse(key, keylen); | |
365 | ||
366 | if (out == NULL) | |
367 | out = btmp; | |
368 | else | |
369 | BIO_push(out, btmp); | |
370 | btmp = NULL; | |
371 | } | |
372 | ||
373 | if (bio == NULL) { | |
374 | if (PKCS7_is_detached(p7)) | |
375 | bio = BIO_new(BIO_s_null()); | |
376 | else if (os && os->length > 0) | |
377 | bio = BIO_new_mem_buf(os->data, os->length); | |
378 | if (bio == NULL) { | |
379 | bio = BIO_new(BIO_s_mem()); | |
380 | if (bio == NULL) | |
381 | goto err; | |
382 | BIO_set_mem_eof_return(bio, 0); | |
383 | } | |
384 | } | |
385 | if (out) | |
386 | BIO_push(out, bio); | |
387 | else | |
388 | out = bio; | |
ca3a82c3 RS |
389 | return out; |
390 | ||
0f113f3e | 391 | err: |
ca3a82c3 RS |
392 | BIO_free_all(out); |
393 | BIO_free_all(btmp); | |
394 | return NULL; | |
0f113f3e | 395 | } |
dfeab068 | 396 | |
8f2e4fdf | 397 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
0f113f3e MC |
398 | { |
399 | int ret; | |
400 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
401 | pcert->cert_info->issuer); | |
402 | if (ret) | |
403 | return ret; | |
f422a514 | 404 | return ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, |
0f113f3e MC |
405 | ri->issuer_and_serial->serial); |
406 | } | |
8f2e4fdf | 407 | |
dfeab068 | 408 | /* int */ |
84fa704c | 409 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
0f113f3e MC |
410 | { |
411 | int i, j; | |
412 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
413 | X509_ALGOR *xa; | |
414 | ASN1_OCTET_STRING *data_body = NULL; | |
415 | const EVP_MD *evp_md; | |
416 | const EVP_CIPHER *evp_cipher = NULL; | |
417 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
418 | X509_ALGOR *enc_alg = NULL; | |
419 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
420 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
421 | PKCS7_RECIP_INFO *ri = NULL; | |
422 | unsigned char *ek = NULL, *tkey = NULL; | |
423 | int eklen = 0, tkeylen = 0; | |
424 | ||
c225c3cf EK |
425 | if (p7 == NULL) { |
426 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
427 | return NULL; | |
428 | } | |
429 | ||
430 | if (p7->d.ptr == NULL) { | |
431 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
432 | return NULL; | |
433 | } | |
434 | ||
0f113f3e MC |
435 | i = OBJ_obj2nid(p7->type); |
436 | p7->state = PKCS7_S_HEADER; | |
437 | ||
438 | switch (i) { | |
439 | case NID_pkcs7_signed: | |
440 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); | |
441 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
442 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
443 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
444 | goto err; | |
445 | } | |
446 | md_sk = p7->d.sign->md_algs; | |
447 | break; | |
448 | case NID_pkcs7_signedAndEnveloped: | |
449 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
450 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
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; | |
463 | data_body = p7->d.enveloped->enc_data->enc_data; | |
464 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
465 | if (evp_cipher == NULL) { | |
466 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
467 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
468 | goto err; | |
469 | } | |
470 | break; | |
471 | default: | |
472 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
473 | goto err; | |
474 | } | |
475 | ||
476 | /* We will be checking the signature */ | |
477 | if (md_sk != NULL) { | |
478 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
479 | xa = sk_X509_ALGOR_value(md_sk, i); | |
480 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
481 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
482 | goto err; | |
483 | } | |
484 | ||
485 | j = OBJ_obj2nid(xa->algorithm); | |
486 | evp_md = EVP_get_digestbynid(j); | |
487 | if (evp_md == NULL) { | |
488 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
489 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
490 | goto err; | |
491 | } | |
492 | ||
493 | BIO_set_md(btmp, evp_md); | |
494 | if (out == NULL) | |
495 | out = btmp; | |
496 | else | |
497 | BIO_push(out, btmp); | |
498 | btmp = NULL; | |
499 | } | |
500 | } | |
501 | ||
502 | if (evp_cipher != NULL) { | |
0f113f3e MC |
503 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
504 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
505 | goto err; | |
506 | } | |
507 | ||
508 | /* | |
509 | * It was encrypted, we need to decrypt the secret key with the | |
510 | * private key | |
511 | */ | |
512 | ||
513 | /* | |
514 | * Find the recipientInfo which matches the passed certificate (if | |
515 | * any) | |
516 | */ | |
517 | ||
518 | if (pcert) { | |
519 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
520 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
521 | if (!pkcs7_cmp_ri(ri, pcert)) | |
522 | break; | |
523 | ri = NULL; | |
524 | } | |
525 | if (ri == NULL) { | |
526 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
527 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
528 | goto err; | |
529 | } | |
530 | } | |
531 | ||
532 | /* If we haven't got a certificate try each ri in turn */ | |
533 | if (pcert == NULL) { | |
534 | /* | |
535 | * Always attempt to decrypt all rinfo even after success as a | |
536 | * defence against MMA timing attacks. | |
537 | */ | |
538 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
539 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
540 | ||
541 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
542 | goto err; | |
543 | ERR_clear_error(); | |
544 | } | |
545 | } else { | |
546 | /* Only exit on fatal errors, not decrypt failure */ | |
547 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
548 | goto err; | |
549 | ERR_clear_error(); | |
550 | } | |
551 | ||
552 | evp_ctx = NULL; | |
553 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
554 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
555 | goto err; | |
556 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
557 | goto err; | |
558 | /* Generate random key as MMA defence */ | |
559 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
560 | tkey = OPENSSL_malloc(tkeylen); | |
561 | if (!tkey) | |
562 | goto err; | |
563 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
564 | goto err; | |
565 | if (ek == NULL) { | |
566 | ek = tkey; | |
567 | eklen = tkeylen; | |
568 | tkey = NULL; | |
569 | } | |
570 | ||
571 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
572 | /* | |
573 | * Some S/MIME clients don't use the same key and effective key | |
574 | * length. The key length is determined by the size of the | |
575 | * decrypted RSA key. | |
576 | */ | |
577 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
578 | /* Use random key as MMA defence */ | |
579 | OPENSSL_cleanse(ek, eklen); | |
580 | OPENSSL_free(ek); | |
581 | ek = tkey; | |
582 | eklen = tkeylen; | |
583 | tkey = NULL; | |
584 | } | |
585 | } | |
586 | /* Clear errors so we don't leak information useful in MMA */ | |
587 | ERR_clear_error(); | |
588 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
589 | goto err; | |
590 | ||
591 | if (ek) { | |
592 | OPENSSL_cleanse(ek, eklen); | |
593 | OPENSSL_free(ek); | |
594 | ek = NULL; | |
595 | } | |
596 | if (tkey) { | |
597 | OPENSSL_cleanse(tkey, tkeylen); | |
598 | OPENSSL_free(tkey); | |
599 | tkey = NULL; | |
600 | } | |
601 | ||
602 | if (out == NULL) | |
603 | out = etmp; | |
604 | else | |
605 | BIO_push(out, etmp); | |
606 | etmp = NULL; | |
607 | } | |
0f113f3e MC |
608 | if (PKCS7_is_detached(p7) || (in_bio != NULL)) { |
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()); | |
615 | BIO_set_mem_eof_return(bio, 0); | |
616 | } | |
617 | if (bio == NULL) | |
618 | goto err; | |
0f113f3e MC |
619 | } |
620 | BIO_push(out, bio); | |
621 | bio = NULL; | |
0f113f3e MC |
622 | if (0) { |
623 | err: | |
624 | if (ek) { | |
625 | OPENSSL_cleanse(ek, eklen); | |
626 | OPENSSL_free(ek); | |
627 | } | |
628 | if (tkey) { | |
629 | OPENSSL_cleanse(tkey, tkeylen); | |
630 | OPENSSL_free(tkey); | |
631 | } | |
ca3a82c3 RS |
632 | BIO_free_all(out); |
633 | BIO_free_all(btmp); | |
634 | BIO_free_all(etmp); | |
635 | BIO_free_all(bio); | |
0f113f3e MC |
636 | out = NULL; |
637 | } | |
638 | return (out); | |
639 | } | |
d02b48c6 | 640 | |
c5a55463 | 641 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
0f113f3e MC |
642 | { |
643 | for (;;) { | |
644 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
645 | if (bio == NULL) { | |
646 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
647 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
648 | return NULL; | |
649 | } | |
650 | BIO_get_md_ctx(bio, pmd); | |
651 | if (*pmd == NULL) { | |
652 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
653 | return NULL; | |
654 | } | |
655 | if (EVP_MD_CTX_type(*pmd) == nid) | |
656 | return bio; | |
657 | bio = BIO_next(bio); | |
658 | } | |
659 | return NULL; | |
660 | } | |
c5a55463 | 661 | |
76fa8f18 | 662 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
0f113f3e MC |
663 | { |
664 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
665 | unsigned int md_len; | |
666 | ||
667 | /* Add signing time if not already present */ | |
668 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
669 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
670 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
671 | return 0; | |
672 | } | |
673 | } | |
674 | ||
675 | /* Add digest */ | |
676 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
677 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
678 | return 0; | |
679 | } | |
680 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
681 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
682 | return 0; | |
683 | } | |
684 | ||
685 | /* Now sign the attributes */ | |
686 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
687 | return 0; | |
688 | ||
689 | return 1; | |
690 | } | |
691 | ||
6b691a5c | 692 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
693 | { |
694 | int ret = 0; | |
695 | int i, j; | |
696 | BIO *btmp; | |
697 | PKCS7_SIGNER_INFO *si; | |
698 | EVP_MD_CTX *mdc, ctx_tmp; | |
699 | STACK_OF(X509_ATTRIBUTE) *sk; | |
700 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
701 | ASN1_OCTET_STRING *os = NULL; | |
702 | ||
c225c3cf EK |
703 | if (p7 == NULL) { |
704 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | if (p7->d.ptr == NULL) { | |
709 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
710 | return 0; | |
711 | } | |
712 | ||
0f113f3e MC |
713 | EVP_MD_CTX_init(&ctx_tmp); |
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; | |
725 | if (!os) { | |
f422a514 | 726 | os = ASN1_OCTET_STRING_new(); |
0f113f3e MC |
727 | if (!os) { |
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; | |
737 | if (!os) { | |
f422a514 | 738 | os = ASN1_OCTET_STRING_new(); |
0f113f3e MC |
739 | if (!os) { |
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 | */ | |
790 | if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc)) | |
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) { | |
800 | if (!do_pkcs7_signed_attrib(si, &ctx_tmp)) | |
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); | |
807 | if (!abuf) | |
808 | goto err; | |
809 | ||
810 | if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) { | |
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: | |
855 | EVP_MD_CTX_cleanup(&ctx_tmp); | |
856 | return (ret); | |
857 | } | |
d02b48c6 | 858 | |
76fa8f18 | 859 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
0f113f3e MC |
860 | { |
861 | EVP_MD_CTX mctx; | |
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 | ||
872 | EVP_MD_CTX_init(&mctx); | |
873 | if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) | |
874 | goto err; | |
875 | ||
876 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
877 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
878 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
879 | goto err; | |
880 | } | |
881 | ||
882 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
883 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
884 | if (!abuf) | |
885 | goto err; | |
886 | if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0) | |
887 | goto err; | |
888 | OPENSSL_free(abuf); | |
889 | abuf = NULL; | |
890 | if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) | |
891 | goto err; | |
892 | abuf = OPENSSL_malloc(siglen); | |
893 | if (!abuf) | |
894 | goto err; | |
895 | if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) | |
896 | goto err; | |
897 | ||
898 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
899 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
900 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
901 | goto err; | |
902 | } | |
903 | ||
904 | EVP_MD_CTX_cleanup(&mctx); | |
905 | ||
906 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
907 | ||
908 | return 1; | |
909 | ||
910 | err: | |
911 | if (abuf) | |
912 | OPENSSL_free(abuf); | |
913 | EVP_MD_CTX_cleanup(&mctx); | |
914 | return 0; | |
915 | ||
916 | } | |
76fa8f18 | 917 | |
6b691a5c | 918 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
0f113f3e MC |
919 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
920 | { | |
921 | PKCS7_ISSUER_AND_SERIAL *ias; | |
922 | int ret = 0, i; | |
923 | STACK_OF(X509) *cert; | |
924 | X509 *x509; | |
925 | ||
c225c3cf EK |
926 | if (p7 == NULL) { |
927 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
928 | return 0; | |
929 | } | |
930 | ||
931 | if (p7->d.ptr == NULL) { | |
932 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
933 | return 0; | |
934 | } | |
935 | ||
0f113f3e MC |
936 | if (PKCS7_type_is_signed(p7)) { |
937 | cert = p7->d.sign->cert; | |
938 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
939 | cert = p7->d.signed_and_enveloped->cert; | |
940 | } else { | |
941 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
942 | goto err; | |
943 | } | |
944 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
945 | ias = si->issuer_and_serial; | |
946 | ||
947 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
948 | ||
949 | /* were we able to find the cert in passed to us */ | |
950 | if (x509 == NULL) { | |
951 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
952 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
953 | goto err; | |
954 | } | |
955 | ||
956 | /* Lets verify */ | |
957 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
958 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
959 | goto err; | |
960 | } | |
961 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
962 | i = X509_verify_cert(ctx); | |
963 | if (i <= 0) { | |
964 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
965 | X509_STORE_CTX_cleanup(ctx); | |
966 | goto err; | |
967 | } | |
968 | X509_STORE_CTX_cleanup(ctx); | |
969 | ||
970 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
971 | err: | |
972 | return ret; | |
973 | } | |
170afce5 DSH |
974 | |
975 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
0f113f3e | 976 | X509 *x509) |
dfeab068 | 977 | { |
0f113f3e MC |
978 | ASN1_OCTET_STRING *os; |
979 | EVP_MD_CTX mdc_tmp, *mdc; | |
980 | int ret = 0, i; | |
981 | int md_type; | |
982 | STACK_OF(X509_ATTRIBUTE) *sk; | |
983 | BIO *btmp; | |
984 | EVP_PKEY *pkey; | |
985 | ||
986 | EVP_MD_CTX_init(&mdc_tmp); | |
987 | ||
988 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
989 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
990 | goto err; | |
991 | } | |
992 | ||
993 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
994 | ||
995 | btmp = bio; | |
996 | for (;;) { | |
997 | if ((btmp == NULL) || | |
998 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
999 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1000 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1001 | goto err; | |
1002 | } | |
1003 | BIO_get_md_ctx(btmp, &mdc); | |
1004 | if (mdc == NULL) { | |
1005 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
1006 | goto err; | |
1007 | } | |
1008 | if (EVP_MD_CTX_type(mdc) == md_type) | |
1009 | break; | |
1010 | /* | |
1011 | * Workaround for some broken clients that put the signature OID | |
1012 | * instead of the digest OID in digest_alg->algorithm | |
1013 | */ | |
1014 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
1015 | break; | |
1016 | btmp = BIO_next(btmp); | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * mdc is the digest ctx that we want, unless there are attributes, in | |
1021 | * which case the digest is the signed attributes | |
1022 | */ | |
1023 | if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc)) | |
1024 | goto err; | |
1025 | ||
1026 | sk = si->auth_attr; | |
1027 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
1028 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
1029 | unsigned int md_len; | |
1030 | int alen; | |
1031 | ASN1_OCTET_STRING *message_digest; | |
1032 | ||
1033 | if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len)) | |
1034 | goto err; | |
1035 | message_digest = PKCS7_digest_from_attributes(sk); | |
1036 | if (!message_digest) { | |
1037 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1038 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1039 | goto err; | |
1040 | } | |
1041 | if ((message_digest->length != (int)md_len) || | |
1042 | (memcmp(message_digest->data, md_dat, md_len))) { | |
0f113f3e MC |
1043 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1044 | ret = -1; | |
1045 | goto err; | |
1046 | } | |
1047 | ||
1048 | if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL)) | |
1049 | goto err; | |
1050 | ||
1051 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1052 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1053 | if (alen <= 0) { | |
1054 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1055 | ret = -1; | |
1056 | goto err; | |
1057 | } | |
1058 | if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)) | |
1059 | goto err; | |
1060 | ||
1061 | OPENSSL_free(abuf); | |
1062 | } | |
1063 | ||
1064 | os = si->enc_digest; | |
1065 | pkey = X509_get_pubkey(x509); | |
1066 | if (!pkey) { | |
1067 | ret = -1; | |
1068 | goto err; | |
1069 | } | |
1070 | ||
1071 | i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey); | |
1072 | EVP_PKEY_free(pkey); | |
1073 | if (i <= 0) { | |
1074 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1075 | ret = -1; | |
1076 | goto err; | |
c5ba2d99 RS |
1077 | } |
1078 | ret = 1; | |
0f113f3e MC |
1079 | err: |
1080 | EVP_MD_CTX_cleanup(&mdc_tmp); | |
1081 | return (ret); | |
1082 | } | |
d02b48c6 | 1083 | |
6b691a5c | 1084 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
0f113f3e MC |
1085 | { |
1086 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1087 | PKCS7_RECIP_INFO *ri; | |
1088 | int i; | |
1089 | ||
1090 | i = OBJ_obj2nid(p7->type); | |
1091 | if (i != NID_pkcs7_signedAndEnveloped) | |
1092 | return NULL; | |
1093 | if (p7->d.signed_and_enveloped == NULL) | |
1094 | return NULL; | |
1095 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1096 | if (rsk == NULL) | |
1097 | return NULL; | |
1098 | ri = sk_PKCS7_RECIP_INFO_value(rsk, 0); | |
1099 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) | |
1100 | return (NULL); | |
1101 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1102 | return (ri->issuer_and_serial); | |
1103 | } | |
dfeab068 | 1104 | |
6b691a5c | 1105 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1106 | { |
1107 | return (get_attribute(si->auth_attr, nid)); | |
1108 | } | |
dfeab068 | 1109 | |
6b691a5c | 1110 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1111 | { |
1112 | return (get_attribute(si->unauth_attr, nid)); | |
1113 | } | |
dfeab068 | 1114 | |
b6436ff2 | 1115 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
0f113f3e | 1116 | { |
9b0a4531 | 1117 | int idx; |
0f113f3e | 1118 | X509_ATTRIBUTE *xa; |
9b0a4531 DSH |
1119 | idx = X509at_get_attr_by_NID(sk, nid, -1); |
1120 | xa = X509at_get_attr(sk, idx); | |
1121 | return X509_ATTRIBUTE_get0_type(xa, 0); | |
0f113f3e | 1122 | } |
dfeab068 | 1123 | |
b6436ff2 | 1124 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1125 | { |
0f113f3e MC |
1126 | ASN1_TYPE *astype; |
1127 | if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) | |
1128 | return NULL; | |
1129 | return astype->value.octet_string; | |
10243d97 | 1130 | } |
dfeab068 | 1131 | |
b6436ff2 | 1132 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
0f113f3e MC |
1133 | STACK_OF(X509_ATTRIBUTE) *sk) |
1134 | { | |
1135 | int i; | |
1136 | ||
1137 | if (p7si->auth_attr != NULL) | |
1138 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); | |
1139 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1140 | if (p7si->auth_attr == NULL) | |
1141 | return 0; | |
1142 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1143 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1144 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1145 | (sk, i)))) | |
1146 | == NULL) | |
1147 | return (0); | |
1148 | } | |
1149 | return (1); | |
1150 | } | |
1151 | ||
1152 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1153 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1154 | { | |
1155 | int i; | |
1156 | ||
1157 | if (p7si->unauth_attr != NULL) | |
1158 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); | |
1159 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1160 | if (p7si->unauth_attr == NULL) | |
1161 | return 0; | |
1162 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1163 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1164 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1165 | (sk, i)))) | |
1166 | == NULL) | |
1167 | return (0); | |
1168 | } | |
1169 | return (1); | |
1170 | } | |
dfeab068 | 1171 | |
6b691a5c | 1172 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1173 | void *value) |
1174 | { | |
1175 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1176 | } | |
dfeab068 | 1177 | |
6b691a5c | 1178 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1179 | void *value) |
1180 | { | |
1181 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1182 | } | |
dfeab068 | 1183 | |
b6436ff2 | 1184 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e MC |
1185 | void *value) |
1186 | { | |
1187 | X509_ATTRIBUTE *attr = NULL; | |
1188 | ||
1189 | if (*sk == NULL) { | |
1190 | *sk = sk_X509_ATTRIBUTE_new_null(); | |
1191 | if (*sk == NULL) | |
1192 | return 0; | |
1193 | new_attrib: | |
1194 | if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value))) | |
1195 | return 0; | |
1196 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1197 | X509_ATTRIBUTE_free(attr); | |
1198 | return 0; | |
1199 | } | |
1200 | } else { | |
1201 | int i; | |
1202 | ||
1203 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1204 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
9b0a4531 | 1205 | if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) { |
0f113f3e MC |
1206 | X509_ATTRIBUTE_free(attr); |
1207 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1208 | if (attr == NULL) | |
1209 | return 0; | |
1210 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1211 | X509_ATTRIBUTE_free(attr); | |
1212 | return 0; | |
1213 | } | |
1214 | goto end; | |
1215 | } | |
1216 | } | |
1217 | goto new_attrib; | |
1218 | } | |
1219 | end: | |
1220 | return (1); | |
1221 | } |