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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. | |
ae5c8664 | 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). | |
ae5c8664 | 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. | |
ae5c8664 | 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 :-). | |
ae5c8664 | 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)" | |
ae5c8664 | 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. | |
ae5c8664 | 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, |
ae5c8664 | 68 | void *value); |
b6436ff2 | 69 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
dfeab068 | 70 | |
ae5c8664 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) |
ae5c8664 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) |
ae5c8664 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: | |
131 | if (btmp) | |
132 | BIO_free(btmp); | |
133 | return 0; | |
c5a55463 | 134 | |
ae5c8664 | 135 | } |
399a6f0b | 136 | |
ae5c8664 MC |
137 | static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
138 | unsigned char *key, int keylen) | |
139 | { | |
140 | EVP_PKEY_CTX *pctx = NULL; | |
141 | EVP_PKEY *pkey = NULL; | |
142 | unsigned char *ek = NULL; | |
143 | int ret = 0; | |
144 | size_t eklen; | |
399a6f0b | 145 | |
ae5c8664 | 146 | pkey = X509_get_pubkey(ri->cert); |
399a6f0b | 147 | |
ae5c8664 MC |
148 | if (!pkey) |
149 | return 0; | |
399a6f0b | 150 | |
ae5c8664 MC |
151 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
152 | if (!pctx) | |
153 | return 0; | |
399a6f0b | 154 | |
ae5c8664 MC |
155 | if (EVP_PKEY_encrypt_init(pctx) <= 0) |
156 | goto err; | |
399a6f0b | 157 | |
ae5c8664 MC |
158 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
159 | EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) { | |
160 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); | |
161 | goto err; | |
162 | } | |
399a6f0b | 163 | |
ae5c8664 MC |
164 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
165 | goto err; | |
399a6f0b | 166 | |
ae5c8664 | 167 | ek = OPENSSL_malloc(eklen); |
399a6f0b | 168 | |
ae5c8664 MC |
169 | if (ek == NULL) { |
170 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); | |
171 | goto err; | |
172 | } | |
399a6f0b | 173 | |
ae5c8664 MC |
174 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
175 | goto err; | |
399a6f0b | 176 | |
ae5c8664 MC |
177 | ASN1_STRING_set0(ri->enc_key, ek, eklen); |
178 | ek = NULL; | |
399a6f0b | 179 | |
ae5c8664 | 180 | ret = 1; |
399a6f0b | 181 | |
ae5c8664 MC |
182 | err: |
183 | if (pkey) | |
184 | EVP_PKEY_free(pkey); | |
185 | if (pctx) | |
186 | EVP_PKEY_CTX_free(pctx); | |
187 | if (ek) | |
188 | OPENSSL_free(ek); | |
189 | return ret; | |
399a6f0b | 190 | |
ae5c8664 | 191 | } |
399a6f0b | 192 | |
777c47ac | 193 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
ae5c8664 MC |
194 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
195 | { | |
196 | EVP_PKEY_CTX *pctx = NULL; | |
197 | unsigned char *ek = NULL; | |
198 | size_t eklen; | |
199 | ||
200 | int ret = -1; | |
201 | ||
202 | pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
203 | if (!pctx) | |
204 | return -1; | |
205 | ||
206 | if (EVP_PKEY_decrypt_init(pctx) <= 0) | |
207 | goto err; | |
208 | ||
209 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, | |
210 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { | |
211 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); | |
212 | goto err; | |
213 | } | |
214 | ||
215 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, | |
216 | ri->enc_key->data, ri->enc_key->length) <= 0) | |
217 | goto err; | |
218 | ||
219 | ek = OPENSSL_malloc(eklen); | |
220 | ||
221 | if (ek == NULL) { | |
222 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); | |
223 | goto err; | |
224 | } | |
225 | ||
226 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, | |
227 | ri->enc_key->data, ri->enc_key->length) <= 0) { | |
228 | ret = 0; | |
229 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); | |
230 | goto err; | |
231 | } | |
232 | ||
233 | ret = 1; | |
234 | ||
235 | if (*pek) { | |
236 | OPENSSL_cleanse(*pek, *peklen); | |
237 | OPENSSL_free(*pek); | |
238 | } | |
239 | ||
240 | *pek = ek; | |
241 | *peklen = eklen; | |
242 | ||
243 | err: | |
244 | if (pctx) | |
245 | EVP_PKEY_CTX_free(pctx); | |
246 | if (!ret && ek) | |
247 | OPENSSL_free(ek); | |
248 | ||
249 | return ret; | |
250 | } | |
399a6f0b | 251 | |
6b691a5c | 252 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
ae5c8664 MC |
253 | { |
254 | int i; | |
255 | BIO *out = NULL, *btmp = NULL; | |
256 | X509_ALGOR *xa = NULL; | |
257 | const EVP_CIPHER *evp_cipher = NULL; | |
258 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
259 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
260 | X509_ALGOR *xalg = NULL; | |
261 | PKCS7_RECIP_INFO *ri = NULL; | |
262 | ASN1_OCTET_STRING *os = NULL; | |
263 | ||
c0334c2c EK |
264 | if (p7 == NULL) { |
265 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
266 | return NULL; | |
267 | } | |
268 | /* | |
269 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
270 | * only applies to inner content (precisely, detached signatures). | |
271 | * | |
272 | * When reading content, missing outer content is therefore treated as an | |
273 | * error. | |
274 | * | |
275 | * When creating content, PKCS7_content_new() must be called before | |
276 | * calling this method, so a NULL p7->d is always an error. | |
277 | */ | |
278 | if (p7->d.ptr == NULL) { | |
279 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
280 | return NULL; | |
281 | } | |
282 | ||
ae5c8664 MC |
283 | i = OBJ_obj2nid(p7->type); |
284 | p7->state = PKCS7_S_HEADER; | |
285 | ||
286 | switch (i) { | |
287 | case NID_pkcs7_signed: | |
288 | md_sk = p7->d.sign->md_algs; | |
289 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
290 | break; | |
291 | case NID_pkcs7_signedAndEnveloped: | |
292 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
293 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
294 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
295 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
296 | if (evp_cipher == NULL) { | |
297 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
298 | goto err; | |
299 | } | |
300 | break; | |
301 | case NID_pkcs7_enveloped: | |
302 | rsk = p7->d.enveloped->recipientinfo; | |
303 | xalg = p7->d.enveloped->enc_data->algorithm; | |
304 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
305 | if (evp_cipher == NULL) { | |
306 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
307 | goto err; | |
308 | } | |
309 | break; | |
310 | case NID_pkcs7_digest: | |
311 | xa = p7->d.digest->md; | |
312 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
313 | break; | |
314 | case NID_pkcs7_data: | |
315 | break; | |
316 | default: | |
317 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
318 | goto err; | |
319 | } | |
320 | ||
321 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
322 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
323 | goto err; | |
324 | ||
325 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
326 | goto err; | |
327 | ||
328 | if (evp_cipher != NULL) { | |
329 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
330 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
331 | int keylen, ivlen; | |
332 | EVP_CIPHER_CTX *ctx; | |
333 | ||
334 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
335 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
336 | goto err; | |
337 | } | |
338 | BIO_get_cipher_ctx(btmp, &ctx); | |
339 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
340 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
341 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
342 | if (ivlen > 0) | |
ad64a69e | 343 | if (RAND_bytes(iv, ivlen) <= 0) |
ae5c8664 MC |
344 | goto err; |
345 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
346 | goto err; | |
347 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
348 | goto err; | |
349 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
350 | goto err; | |
351 | ||
352 | if (ivlen > 0) { | |
353 | if (xalg->parameter == NULL) { | |
354 | xalg->parameter = ASN1_TYPE_new(); | |
355 | if (xalg->parameter == NULL) | |
356 | goto err; | |
357 | } | |
358 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
359 | goto err; | |
360 | } | |
361 | ||
362 | /* Lets do the pub key stuff :-) */ | |
363 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
364 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
365 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
366 | goto err; | |
367 | } | |
368 | OPENSSL_cleanse(key, keylen); | |
369 | ||
370 | if (out == NULL) | |
371 | out = btmp; | |
372 | else | |
373 | BIO_push(out, btmp); | |
374 | btmp = NULL; | |
375 | } | |
376 | ||
377 | if (bio == NULL) { | |
c46343fe | 378 | if (PKCS7_is_detached(p7)) { |
ae5c8664 | 379 | bio = BIO_new(BIO_s_null()); |
c46343fe | 380 | } else if (os && os->length > 0) { |
ae5c8664 | 381 | bio = BIO_new_mem_buf(os->data, os->length); |
c46343fe | 382 | } else { |
ae5c8664 MC |
383 | bio = BIO_new(BIO_s_mem()); |
384 | if (bio == NULL) | |
385 | goto err; | |
386 | BIO_set_mem_eof_return(bio, 0); | |
387 | } | |
c46343fe MC |
388 | if (bio == NULL) |
389 | goto err; | |
ae5c8664 MC |
390 | } |
391 | if (out) | |
392 | BIO_push(out, bio); | |
393 | else | |
394 | out = bio; | |
395 | bio = NULL; | |
396 | if (0) { | |
397 | err: | |
398 | if (out != NULL) | |
399 | BIO_free_all(out); | |
400 | if (btmp != NULL) | |
401 | BIO_free_all(btmp); | |
402 | out = NULL; | |
403 | } | |
404 | return (out); | |
405 | } | |
dfeab068 | 406 | |
8f2e4fdf | 407 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
ae5c8664 MC |
408 | { |
409 | int ret; | |
410 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
411 | pcert->cert_info->issuer); | |
412 | if (ret) | |
413 | return ret; | |
414 | return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, | |
415 | ri->issuer_and_serial->serial); | |
416 | } | |
8f2e4fdf | 417 | |
dfeab068 | 418 | /* int */ |
84fa704c | 419 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
ae5c8664 MC |
420 | { |
421 | int i, j; | |
422 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
423 | X509_ALGOR *xa; | |
424 | ASN1_OCTET_STRING *data_body = NULL; | |
425 | const EVP_MD *evp_md; | |
426 | const EVP_CIPHER *evp_cipher = NULL; | |
427 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
428 | X509_ALGOR *enc_alg = NULL; | |
429 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
430 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
431 | PKCS7_RECIP_INFO *ri = NULL; | |
432 | unsigned char *ek = NULL, *tkey = NULL; | |
433 | int eklen = 0, tkeylen = 0; | |
434 | ||
c0334c2c EK |
435 | if (p7 == NULL) { |
436 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | if (p7->d.ptr == NULL) { | |
441 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
442 | return NULL; | |
443 | } | |
444 | ||
ae5c8664 MC |
445 | i = OBJ_obj2nid(p7->type); |
446 | p7->state = PKCS7_S_HEADER; | |
447 | ||
448 | switch (i) { | |
449 | case NID_pkcs7_signed: | |
7bc2aee4 EK |
450 | /* |
451 | * p7->d.sign->contents is a PKCS7 structure consisting of a contentType | |
452 | * field and optional content. | |
453 | * data_body is NULL if that structure has no (=detached) content | |
454 | * or if the contentType is wrong (i.e., not "data"). | |
455 | */ | |
ae5c8664 MC |
456 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); |
457 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
458 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
459 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
460 | goto err; | |
461 | } | |
462 | md_sk = p7->d.sign->md_algs; | |
463 | break; | |
464 | case NID_pkcs7_signedAndEnveloped: | |
465 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
466 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
7bc2aee4 | 467 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
ae5c8664 MC |
468 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; |
469 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
470 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
471 | if (evp_cipher == NULL) { | |
472 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
473 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
474 | goto err; | |
475 | } | |
476 | break; | |
477 | case NID_pkcs7_enveloped: | |
478 | rsk = p7->d.enveloped->recipientinfo; | |
479 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
7bc2aee4 | 480 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
ae5c8664 MC |
481 | data_body = p7->d.enveloped->enc_data->enc_data; |
482 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
483 | if (evp_cipher == NULL) { | |
484 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
485 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
486 | goto err; | |
487 | } | |
488 | break; | |
489 | default: | |
490 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
491 | goto err; | |
492 | } | |
493 | ||
7bc2aee4 EK |
494 | /* Detached content must be supplied via in_bio instead. */ |
495 | if (data_body == NULL && in_bio == NULL) { | |
496 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
497 | goto err; | |
498 | } | |
499 | ||
ae5c8664 MC |
500 | /* We will be checking the signature */ |
501 | if (md_sk != NULL) { | |
502 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
503 | xa = sk_X509_ALGOR_value(md_sk, i); | |
504 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
505 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
506 | goto err; | |
507 | } | |
508 | ||
509 | j = OBJ_obj2nid(xa->algorithm); | |
510 | evp_md = EVP_get_digestbynid(j); | |
511 | if (evp_md == NULL) { | |
512 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
513 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
514 | goto err; | |
515 | } | |
516 | ||
517 | BIO_set_md(btmp, evp_md); | |
518 | if (out == NULL) | |
519 | out = btmp; | |
520 | else | |
521 | BIO_push(out, btmp); | |
522 | btmp = NULL; | |
523 | } | |
524 | } | |
525 | ||
526 | if (evp_cipher != NULL) { | |
dfeab068 | 527 | #if 0 |
ae5c8664 MC |
528 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
529 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
530 | unsigned char *p; | |
531 | int keylen, ivlen; | |
532 | int max; | |
533 | X509_OBJECT ret; | |
dfeab068 | 534 | #endif |
dfeab068 | 535 | |
ae5c8664 MC |
536 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
537 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
538 | goto err; | |
539 | } | |
540 | ||
541 | /* | |
542 | * It was encrypted, we need to decrypt the secret key with the | |
543 | * private key | |
544 | */ | |
545 | ||
546 | /* | |
547 | * Find the recipientInfo which matches the passed certificate (if | |
548 | * any) | |
549 | */ | |
550 | ||
551 | if (pcert) { | |
552 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
553 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
554 | if (!pkcs7_cmp_ri(ri, pcert)) | |
555 | break; | |
556 | ri = NULL; | |
557 | } | |
558 | if (ri == NULL) { | |
559 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
560 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
561 | goto err; | |
562 | } | |
563 | } | |
564 | ||
565 | /* If we haven't got a certificate try each ri in turn */ | |
566 | if (pcert == NULL) { | |
567 | /* | |
568 | * Always attempt to decrypt all rinfo even after sucess as a | |
569 | * defence against MMA timing attacks. | |
570 | */ | |
571 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
572 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
573 | ||
574 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
575 | goto err; | |
576 | ERR_clear_error(); | |
577 | } | |
578 | } else { | |
579 | /* Only exit on fatal errors, not decrypt failure */ | |
580 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
581 | goto err; | |
582 | ERR_clear_error(); | |
583 | } | |
584 | ||
585 | evp_ctx = NULL; | |
586 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
587 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
588 | goto err; | |
589 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
590 | goto err; | |
591 | /* Generate random key as MMA defence */ | |
592 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
593 | tkey = OPENSSL_malloc(tkeylen); | |
594 | if (!tkey) | |
595 | goto err; | |
596 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
597 | goto err; | |
598 | if (ek == NULL) { | |
599 | ek = tkey; | |
600 | eklen = tkeylen; | |
601 | tkey = NULL; | |
602 | } | |
603 | ||
604 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
605 | /* | |
606 | * Some S/MIME clients don't use the same key and effective key | |
607 | * length. The key length is determined by the size of the | |
608 | * decrypted RSA key. | |
609 | */ | |
610 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
611 | /* Use random key as MMA defence */ | |
612 | OPENSSL_cleanse(ek, eklen); | |
613 | OPENSSL_free(ek); | |
614 | ek = tkey; | |
615 | eklen = tkeylen; | |
616 | tkey = NULL; | |
617 | } | |
618 | } | |
619 | /* Clear errors so we don't leak information useful in MMA */ | |
620 | ERR_clear_error(); | |
621 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
622 | goto err; | |
623 | ||
624 | if (ek) { | |
625 | OPENSSL_cleanse(ek, eklen); | |
626 | OPENSSL_free(ek); | |
627 | ek = NULL; | |
628 | } | |
629 | if (tkey) { | |
630 | OPENSSL_cleanse(tkey, tkeylen); | |
631 | OPENSSL_free(tkey); | |
632 | tkey = NULL; | |
633 | } | |
634 | ||
635 | if (out == NULL) | |
636 | out = etmp; | |
637 | else | |
638 | BIO_push(out, etmp); | |
639 | etmp = NULL; | |
640 | } | |
dfeab068 | 641 | #if 1 |
7bc2aee4 | 642 | if (in_bio != NULL) { |
ae5c8664 MC |
643 | bio = in_bio; |
644 | } else { | |
645 | # if 0 | |
646 | bio = BIO_new(BIO_s_mem()); | |
a03f81f4 RS |
647 | if (bio == NULL) |
648 | goto err; | |
ae5c8664 MC |
649 | /* |
650 | * We need to set this so that when we have read all the data, the | |
651 | * encrypt BIO, if present, will read EOF and encode the last few | |
652 | * bytes | |
653 | */ | |
654 | BIO_set_mem_eof_return(bio, 0); | |
655 | ||
656 | if (data_body->length > 0) | |
657 | BIO_write(bio, (char *)data_body->data, data_body->length); | |
658 | # else | |
659 | if (data_body->length > 0) | |
660 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
661 | else { | |
662 | bio = BIO_new(BIO_s_mem()); | |
903738ac MC |
663 | if (bio == NULL) |
664 | goto err; | |
ae5c8664 MC |
665 | BIO_set_mem_eof_return(bio, 0); |
666 | } | |
667 | if (bio == NULL) | |
668 | goto err; | |
669 | # endif | |
670 | } | |
671 | BIO_push(out, bio); | |
672 | bio = NULL; | |
dfeab068 | 673 | #endif |
ae5c8664 MC |
674 | if (0) { |
675 | err: | |
676 | if (ek) { | |
677 | OPENSSL_cleanse(ek, eklen); | |
678 | OPENSSL_free(ek); | |
679 | } | |
680 | if (tkey) { | |
681 | OPENSSL_cleanse(tkey, tkeylen); | |
682 | OPENSSL_free(tkey); | |
683 | } | |
684 | if (out != NULL) | |
685 | BIO_free_all(out); | |
686 | if (btmp != NULL) | |
687 | BIO_free_all(btmp); | |
688 | if (etmp != NULL) | |
689 | BIO_free_all(etmp); | |
690 | if (bio != NULL) | |
691 | BIO_free_all(bio); | |
692 | out = NULL; | |
693 | } | |
694 | return (out); | |
695 | } | |
d02b48c6 | 696 | |
c5a55463 | 697 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
ae5c8664 MC |
698 | { |
699 | for (;;) { | |
700 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
701 | if (bio == NULL) { | |
702 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
703 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
704 | return NULL; | |
705 | } | |
706 | BIO_get_md_ctx(bio, pmd); | |
707 | if (*pmd == NULL) { | |
708 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
709 | return NULL; | |
710 | } | |
711 | if (EVP_MD_CTX_type(*pmd) == nid) | |
712 | return bio; | |
713 | bio = BIO_next(bio); | |
714 | } | |
715 | return NULL; | |
716 | } | |
c5a55463 | 717 | |
76fa8f18 | 718 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
ae5c8664 MC |
719 | { |
720 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
721 | unsigned int md_len; | |
722 | ||
723 | /* Add signing time if not already present */ | |
724 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
725 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
726 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
727 | return 0; | |
728 | } | |
729 | } | |
730 | ||
731 | /* Add digest */ | |
732 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
733 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
734 | return 0; | |
735 | } | |
736 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
737 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
738 | return 0; | |
739 | } | |
740 | ||
741 | /* Now sign the attributes */ | |
742 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
743 | return 0; | |
744 | ||
745 | return 1; | |
746 | } | |
747 | ||
6b691a5c | 748 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
ae5c8664 MC |
749 | { |
750 | int ret = 0; | |
751 | int i, j; | |
752 | BIO *btmp; | |
753 | PKCS7_SIGNER_INFO *si; | |
754 | EVP_MD_CTX *mdc, ctx_tmp; | |
755 | STACK_OF(X509_ATTRIBUTE) *sk; | |
756 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
757 | ASN1_OCTET_STRING *os = NULL; | |
758 | ||
c0334c2c EK |
759 | if (p7 == NULL) { |
760 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | if (p7->d.ptr == NULL) { | |
765 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
766 | return 0; | |
767 | } | |
768 | ||
ae5c8664 MC |
769 | EVP_MD_CTX_init(&ctx_tmp); |
770 | i = OBJ_obj2nid(p7->type); | |
771 | p7->state = PKCS7_S_HEADER; | |
772 | ||
773 | switch (i) { | |
774 | case NID_pkcs7_data: | |
775 | os = p7->d.data; | |
776 | break; | |
777 | case NID_pkcs7_signedAndEnveloped: | |
778 | /* XXXXXXXXXXXXXXXX */ | |
779 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
780 | os = p7->d.signed_and_enveloped->enc_data->enc_data; | |
781 | if (!os) { | |
782 | os = M_ASN1_OCTET_STRING_new(); | |
783 | if (!os) { | |
784 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
785 | goto err; | |
786 | } | |
787 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
788 | } | |
789 | break; | |
790 | case NID_pkcs7_enveloped: | |
791 | /* XXXXXXXXXXXXXXXX */ | |
792 | os = p7->d.enveloped->enc_data->enc_data; | |
793 | if (!os) { | |
794 | os = M_ASN1_OCTET_STRING_new(); | |
795 | if (!os) { | |
796 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
797 | goto err; | |
798 | } | |
799 | p7->d.enveloped->enc_data->enc_data = os; | |
800 | } | |
801 | break; | |
802 | case NID_pkcs7_signed: | |
803 | si_sk = p7->d.sign->signer_info; | |
804 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
805 | /* If detached data then the content is excluded */ | |
806 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
807 | M_ASN1_OCTET_STRING_free(os); | |
c0334c2c | 808 | os = NULL; |
ae5c8664 MC |
809 | p7->d.sign->contents->d.data = NULL; |
810 | } | |
811 | break; | |
812 | ||
813 | case NID_pkcs7_digest: | |
814 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
815 | /* If detached data then the content is excluded */ | |
816 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
817 | M_ASN1_OCTET_STRING_free(os); | |
c0334c2c | 818 | os = NULL; |
ae5c8664 MC |
819 | p7->d.digest->contents->d.data = NULL; |
820 | } | |
821 | break; | |
822 | ||
823 | default: | |
824 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
825 | goto err; | |
826 | } | |
827 | ||
828 | if (si_sk != NULL) { | |
829 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
830 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
831 | if (si->pkey == NULL) | |
832 | continue; | |
833 | ||
834 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
835 | ||
836 | btmp = bio; | |
837 | ||
838 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
839 | ||
840 | if (btmp == NULL) | |
841 | goto err; | |
842 | ||
843 | /* | |
844 | * We now have the EVP_MD_CTX, lets do the signing. | |
845 | */ | |
846 | if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc)) | |
847 | goto err; | |
848 | ||
849 | sk = si->auth_attr; | |
850 | ||
851 | /* | |
852 | * If there are attributes, we add the digest attribute and only | |
853 | * sign the attributes | |
854 | */ | |
855 | if (sk_X509_ATTRIBUTE_num(sk) > 0) { | |
856 | if (!do_pkcs7_signed_attrib(si, &ctx_tmp)) | |
857 | goto err; | |
858 | } else { | |
859 | unsigned char *abuf = NULL; | |
860 | unsigned int abuflen; | |
861 | abuflen = EVP_PKEY_size(si->pkey); | |
862 | abuf = OPENSSL_malloc(abuflen); | |
863 | if (!abuf) | |
864 | goto err; | |
865 | ||
866 | if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) { | |
867 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); | |
868 | goto err; | |
869 | } | |
870 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); | |
871 | } | |
872 | } | |
873 | } else if (i == NID_pkcs7_digest) { | |
874 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
875 | unsigned int md_len; | |
876 | if (!PKCS7_find_digest(&mdc, bio, | |
877 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
878 | goto err; | |
879 | if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) | |
880 | goto err; | |
881 | M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); | |
882 | } | |
883 | ||
c0334c2c | 884 | if (!PKCS7_is_detached(p7)) { |
ae5c8664 | 885 | /* |
c0334c2c EK |
886 | * NOTE(emilia): I think we only reach os == NULL here because detached |
887 | * digested data support is broken. | |
ae5c8664 | 888 | */ |
c0334c2c EK |
889 | if (os == NULL) |
890 | goto err; | |
891 | if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { | |
892 | char *cont; | |
893 | long contlen; | |
894 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); | |
895 | if (btmp == NULL) { | |
896 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
897 | goto err; | |
898 | } | |
899 | contlen = BIO_get_mem_data(btmp, &cont); | |
900 | /* | |
901 | * Mark the BIO read only then we can use its copy of the data | |
902 | * instead of making an extra copy. | |
903 | */ | |
904 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
905 | BIO_set_mem_eof_return(btmp, 0); | |
906 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); | |
907 | } | |
ae5c8664 MC |
908 | } |
909 | ret = 1; | |
910 | err: | |
911 | EVP_MD_CTX_cleanup(&ctx_tmp); | |
912 | return (ret); | |
913 | } | |
d02b48c6 | 914 | |
76fa8f18 | 915 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
ae5c8664 MC |
916 | { |
917 | EVP_MD_CTX mctx; | |
918 | EVP_PKEY_CTX *pctx; | |
919 | unsigned char *abuf = NULL; | |
920 | int alen; | |
921 | size_t siglen; | |
922 | const EVP_MD *md = NULL; | |
923 | ||
924 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); | |
925 | if (md == NULL) | |
926 | return 0; | |
927 | ||
928 | EVP_MD_CTX_init(&mctx); | |
929 | if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) | |
930 | goto err; | |
931 | ||
932 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
933 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
934 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
935 | goto err; | |
936 | } | |
937 | ||
938 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
939 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
940 | if (!abuf) | |
941 | goto err; | |
942 | if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0) | |
943 | goto err; | |
944 | OPENSSL_free(abuf); | |
945 | abuf = NULL; | |
946 | if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) | |
947 | goto err; | |
948 | abuf = OPENSSL_malloc(siglen); | |
949 | if (!abuf) | |
950 | goto err; | |
951 | if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) | |
952 | goto err; | |
953 | ||
954 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
955 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
956 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
957 | goto err; | |
958 | } | |
959 | ||
960 | EVP_MD_CTX_cleanup(&mctx); | |
961 | ||
962 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
963 | ||
964 | return 1; | |
965 | ||
966 | err: | |
967 | if (abuf) | |
968 | OPENSSL_free(abuf); | |
969 | EVP_MD_CTX_cleanup(&mctx); | |
970 | return 0; | |
971 | ||
972 | } | |
76fa8f18 | 973 | |
6b691a5c | 974 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
ae5c8664 MC |
975 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
976 | { | |
977 | PKCS7_ISSUER_AND_SERIAL *ias; | |
978 | int ret = 0, i; | |
979 | STACK_OF(X509) *cert; | |
980 | X509 *x509; | |
981 | ||
c0334c2c EK |
982 | if (p7 == NULL) { |
983 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
984 | return 0; | |
985 | } | |
986 | ||
987 | if (p7->d.ptr == NULL) { | |
988 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
989 | return 0; | |
990 | } | |
991 | ||
ae5c8664 MC |
992 | if (PKCS7_type_is_signed(p7)) { |
993 | cert = p7->d.sign->cert; | |
994 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
995 | cert = p7->d.signed_and_enveloped->cert; | |
996 | } else { | |
997 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
998 | goto err; | |
999 | } | |
1000 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
1001 | ias = si->issuer_and_serial; | |
1002 | ||
1003 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
1004 | ||
1005 | /* were we able to find the cert in passed to us */ | |
1006 | if (x509 == NULL) { | |
1007 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
1008 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
1009 | goto err; | |
1010 | } | |
1011 | ||
1012 | /* Lets verify */ | |
1013 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
1014 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
1015 | goto err; | |
1016 | } | |
1017 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
1018 | i = X509_verify_cert(ctx); | |
1019 | if (i <= 0) { | |
1020 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
1021 | X509_STORE_CTX_cleanup(ctx); | |
1022 | goto err; | |
1023 | } | |
1024 | X509_STORE_CTX_cleanup(ctx); | |
1025 | ||
1026 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
1027 | err: | |
1028 | return ret; | |
1029 | } | |
170afce5 DSH |
1030 | |
1031 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
ae5c8664 | 1032 | X509 *x509) |
dfeab068 | 1033 | { |
ae5c8664 MC |
1034 | ASN1_OCTET_STRING *os; |
1035 | EVP_MD_CTX mdc_tmp, *mdc; | |
1036 | int ret = 0, i; | |
1037 | int md_type; | |
1038 | STACK_OF(X509_ATTRIBUTE) *sk; | |
1039 | BIO *btmp; | |
1040 | EVP_PKEY *pkey; | |
1041 | ||
1042 | EVP_MD_CTX_init(&mdc_tmp); | |
1043 | ||
1044 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
1045 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
1046 | goto err; | |
1047 | } | |
1048 | ||
1049 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
1050 | ||
1051 | btmp = bio; | |
1052 | for (;;) { | |
1053 | if ((btmp == NULL) || | |
1054 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
1055 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1056 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1057 | goto err; | |
1058 | } | |
1059 | BIO_get_md_ctx(btmp, &mdc); | |
1060 | if (mdc == NULL) { | |
1061 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
1062 | goto err; | |
1063 | } | |
1064 | if (EVP_MD_CTX_type(mdc) == md_type) | |
1065 | break; | |
1066 | /* | |
1067 | * Workaround for some broken clients that put the signature OID | |
1068 | * instead of the digest OID in digest_alg->algorithm | |
1069 | */ | |
1070 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
1071 | break; | |
1072 | btmp = BIO_next(btmp); | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * mdc is the digest ctx that we want, unless there are attributes, in | |
1077 | * which case the digest is the signed attributes | |
1078 | */ | |
1079 | if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc)) | |
1080 | goto err; | |
1081 | ||
1082 | sk = si->auth_attr; | |
1083 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
1084 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
1085 | unsigned int md_len; | |
1086 | int alen; | |
1087 | ASN1_OCTET_STRING *message_digest; | |
1088 | ||
1089 | if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len)) | |
1090 | goto err; | |
1091 | message_digest = PKCS7_digest_from_attributes(sk); | |
1092 | if (!message_digest) { | |
1093 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1094 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1095 | goto err; | |
1096 | } | |
1097 | if ((message_digest->length != (int)md_len) || | |
1098 | (memcmp(message_digest->data, md_dat, md_len))) { | |
1099 | #if 0 | |
1100 | { | |
1101 | int ii; | |
1102 | for (ii = 0; ii < message_digest->length; ii++) | |
1103 | printf("%02X", message_digest->data[ii]); | |
1104 | printf(" sent\n"); | |
1105 | for (ii = 0; ii < md_len; ii++) | |
1106 | printf("%02X", md_dat[ii]); | |
1107 | printf(" calc\n"); | |
1108 | } | |
dfeab068 | 1109 | #endif |
ae5c8664 MC |
1110 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1111 | ret = -1; | |
1112 | goto err; | |
1113 | } | |
1114 | ||
1115 | if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL)) | |
1116 | goto err; | |
1117 | ||
1118 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1119 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1120 | if (alen <= 0) { | |
1121 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1122 | ret = -1; | |
1123 | goto err; | |
1124 | } | |
1125 | if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)) | |
1126 | goto err; | |
1127 | ||
1128 | OPENSSL_free(abuf); | |
1129 | } | |
1130 | ||
1131 | os = si->enc_digest; | |
1132 | pkey = X509_get_pubkey(x509); | |
1133 | if (!pkey) { | |
1134 | ret = -1; | |
1135 | goto err; | |
1136 | } | |
1137 | ||
1138 | i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey); | |
1139 | EVP_PKEY_free(pkey); | |
1140 | if (i <= 0) { | |
1141 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1142 | ret = -1; | |
1143 | goto err; | |
1144 | } else | |
1145 | ret = 1; | |
1146 | err: | |
1147 | EVP_MD_CTX_cleanup(&mdc_tmp); | |
1148 | return (ret); | |
1149 | } | |
d02b48c6 | 1150 | |
6b691a5c | 1151 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
ae5c8664 MC |
1152 | { |
1153 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1154 | PKCS7_RECIP_INFO *ri; | |
1155 | int i; | |
1156 | ||
1157 | i = OBJ_obj2nid(p7->type); | |
1158 | if (i != NID_pkcs7_signedAndEnveloped) | |
1159 | return NULL; | |
1160 | if (p7->d.signed_and_enveloped == NULL) | |
1161 | return NULL; | |
1162 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1163 | if (rsk == NULL) | |
1164 | return NULL; | |
ae5c8664 MC |
1165 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) |
1166 | return (NULL); | |
1167 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1168 | return (ri->issuer_and_serial); | |
1169 | } | |
dfeab068 | 1170 | |
6b691a5c | 1171 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
ae5c8664 MC |
1172 | { |
1173 | return (get_attribute(si->auth_attr, nid)); | |
1174 | } | |
dfeab068 | 1175 | |
6b691a5c | 1176 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
ae5c8664 MC |
1177 | { |
1178 | return (get_attribute(si->unauth_attr, nid)); | |
1179 | } | |
dfeab068 | 1180 | |
b6436ff2 | 1181 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
ae5c8664 MC |
1182 | { |
1183 | int i; | |
1184 | X509_ATTRIBUTE *xa; | |
1185 | ASN1_OBJECT *o; | |
1186 | ||
1187 | o = OBJ_nid2obj(nid); | |
1188 | if (!o || !sk) | |
1189 | return (NULL); | |
1190 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1191 | xa = sk_X509_ATTRIBUTE_value(sk, i); | |
1192 | if (OBJ_cmp(xa->object, o) == 0) { | |
1193 | if (!xa->single && sk_ASN1_TYPE_num(xa->value.set)) | |
1194 | return (sk_ASN1_TYPE_value(xa->value.set, 0)); | |
1195 | else | |
1196 | return (NULL); | |
1197 | } | |
1198 | } | |
1199 | return (NULL); | |
1200 | } | |
dfeab068 | 1201 | |
b6436ff2 | 1202 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1203 | { |
ae5c8664 MC |
1204 | ASN1_TYPE *astype; |
1205 | if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) | |
1206 | return NULL; | |
1207 | return astype->value.octet_string; | |
10243d97 | 1208 | } |
dfeab068 | 1209 | |
b6436ff2 | 1210 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
ae5c8664 MC |
1211 | STACK_OF(X509_ATTRIBUTE) *sk) |
1212 | { | |
1213 | int i; | |
1214 | ||
1215 | if (p7si->auth_attr != NULL) | |
1216 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); | |
1217 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1218 | if (p7si->auth_attr == NULL) | |
1219 | return 0; | |
1220 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1221 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1222 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1223 | (sk, i)))) | |
1224 | == NULL) | |
1225 | return (0); | |
1226 | } | |
1227 | return (1); | |
1228 | } | |
1229 | ||
1230 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1231 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1232 | { | |
1233 | int i; | |
1234 | ||
1235 | if (p7si->unauth_attr != NULL) | |
1236 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); | |
1237 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); | |
1238 | if (p7si->unauth_attr == NULL) | |
1239 | return 0; | |
1240 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1241 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1242 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1243 | (sk, i)))) | |
1244 | == NULL) | |
1245 | return (0); | |
1246 | } | |
1247 | return (1); | |
1248 | } | |
dfeab068 | 1249 | |
6b691a5c | 1250 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
ae5c8664 MC |
1251 | void *value) |
1252 | { | |
1253 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1254 | } | |
dfeab068 | 1255 | |
6b691a5c | 1256 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
ae5c8664 MC |
1257 | void *value) |
1258 | { | |
1259 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1260 | } | |
dfeab068 | 1261 | |
b6436ff2 | 1262 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
ae5c8664 MC |
1263 | void *value) |
1264 | { | |
1265 | X509_ATTRIBUTE *attr = NULL; | |
1266 | ||
1267 | if (*sk == NULL) { | |
1268 | *sk = sk_X509_ATTRIBUTE_new_null(); | |
1269 | if (*sk == NULL) | |
1270 | return 0; | |
1271 | new_attrib: | |
1272 | if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value))) | |
1273 | return 0; | |
1274 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1275 | X509_ATTRIBUTE_free(attr); | |
1276 | return 0; | |
1277 | } | |
1278 | } else { | |
1279 | int i; | |
1280 | ||
1281 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1282 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
1283 | if (OBJ_obj2nid(attr->object) == nid) { | |
1284 | X509_ATTRIBUTE_free(attr); | |
1285 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1286 | if (attr == NULL) | |
1287 | return 0; | |
1288 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1289 | X509_ATTRIBUTE_free(attr); | |
1290 | return 0; | |
1291 | } | |
1292 | goto end; | |
1293 | } | |
1294 | } | |
1295 | goto new_attrib; | |
1296 | } | |
1297 | end: | |
1298 | return (1); | |
1299 | } |