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