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Commit | Line | Data |
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62867571 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 3 | * |
62867571 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
ec577822 BM |
12 | #include <openssl/rand.h> |
13 | #include <openssl/objects.h> | |
14 | #include <openssl/x509.h> | |
5a9a4b29 | 15 | #include <openssl/x509v3.h> |
8f2e4fdf | 16 | #include <openssl/err.h> |
d02b48c6 | 17 | |
b6436ff2 | 18 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e | 19 | void *value); |
b6436ff2 | 20 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
dfeab068 | 21 | |
0f113f3e MC |
22 | static int PKCS7_type_is_other(PKCS7 *p7) |
23 | { | |
24 | int isOther = 1; | |
25 | ||
26 | int nid = OBJ_obj2nid(p7->type); | |
27 | ||
28 | switch (nid) { | |
29 | case NID_pkcs7_data: | |
30 | case NID_pkcs7_signed: | |
31 | case NID_pkcs7_enveloped: | |
32 | case NID_pkcs7_signedAndEnveloped: | |
33 | case NID_pkcs7_digest: | |
34 | case NID_pkcs7_encrypted: | |
35 | isOther = 0; | |
36 | break; | |
37 | default: | |
38 | isOther = 1; | |
39 | } | |
40 | ||
41 | return isOther; | |
42 | ||
43 | } | |
67fec850 | 44 | |
caf044cb | 45 | static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7) |
0f113f3e MC |
46 | { |
47 | if (PKCS7_type_is_data(p7)) | |
48 | return p7->d.data; | |
49 | if (PKCS7_type_is_other(p7) && p7->d.other | |
50 | && (p7->d.other->type == V_ASN1_OCTET_STRING)) | |
51 | return p7->d.other->value.octet_string; | |
52 | return NULL; | |
53 | } | |
67fec850 | 54 | |
c5a55463 | 55 | static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg) |
0f113f3e MC |
56 | { |
57 | BIO *btmp; | |
58 | const EVP_MD *md; | |
59 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
60 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); | |
61 | goto err; | |
62 | } | |
63 | ||
64 | md = EVP_get_digestbyobj(alg->algorithm); | |
65 | if (md == NULL) { | |
66 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
67 | goto err; | |
68 | } | |
69 | ||
70 | BIO_set_md(btmp, md); | |
71 | if (*pbio == NULL) | |
72 | *pbio = btmp; | |
73 | else if (!BIO_push(*pbio, btmp)) { | |
74 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); | |
75 | goto err; | |
76 | } | |
77 | btmp = NULL; | |
78 | ||
79 | return 1; | |
80 | ||
81 | err: | |
ca3a82c3 | 82 | BIO_free(btmp); |
0f113f3e | 83 | return 0; |
c5a55463 | 84 | |
0f113f3e | 85 | } |
399a6f0b | 86 | |
0f113f3e MC |
87 | static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
88 | unsigned char *key, int keylen) | |
89 | { | |
90 | EVP_PKEY_CTX *pctx = NULL; | |
91 | EVP_PKEY *pkey = NULL; | |
92 | unsigned char *ek = NULL; | |
93 | int ret = 0; | |
94 | size_t eklen; | |
399a6f0b | 95 | |
8382fd3a | 96 | pkey = X509_get0_pubkey(ri->cert); |
399a6f0b | 97 | |
0f113f3e MC |
98 | if (!pkey) |
99 | return 0; | |
399a6f0b | 100 | |
0f113f3e MC |
101 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
102 | if (!pctx) | |
103 | return 0; | |
399a6f0b | 104 | |
0f113f3e MC |
105 | if (EVP_PKEY_encrypt_init(pctx) <= 0) |
106 | goto err; | |
399a6f0b | 107 | |
0f113f3e MC |
108 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
109 | EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) { | |
110 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); | |
111 | goto err; | |
112 | } | |
399a6f0b | 113 | |
0f113f3e MC |
114 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
115 | goto err; | |
399a6f0b | 116 | |
0f113f3e | 117 | ek = OPENSSL_malloc(eklen); |
399a6f0b | 118 | |
0f113f3e MC |
119 | if (ek == NULL) { |
120 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); | |
121 | goto err; | |
122 | } | |
399a6f0b | 123 | |
0f113f3e MC |
124 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
125 | goto err; | |
399a6f0b | 126 | |
0f113f3e MC |
127 | ASN1_STRING_set0(ri->enc_key, ek, eklen); |
128 | ek = NULL; | |
399a6f0b | 129 | |
0f113f3e | 130 | ret = 1; |
399a6f0b | 131 | |
0f113f3e | 132 | err: |
c5ba2d99 | 133 | EVP_PKEY_CTX_free(pctx); |
b548a1f1 | 134 | OPENSSL_free(ek); |
0f113f3e | 135 | return ret; |
399a6f0b | 136 | |
0f113f3e | 137 | } |
399a6f0b | 138 | |
777c47ac | 139 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
0f113f3e MC |
140 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
141 | { | |
142 | EVP_PKEY_CTX *pctx = NULL; | |
143 | unsigned char *ek = NULL; | |
144 | size_t eklen; | |
145 | ||
146 | int ret = -1; | |
147 | ||
148 | pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
149 | if (!pctx) | |
150 | return -1; | |
151 | ||
152 | if (EVP_PKEY_decrypt_init(pctx) <= 0) | |
153 | goto err; | |
154 | ||
155 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, | |
156 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { | |
157 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); | |
158 | goto err; | |
159 | } | |
160 | ||
161 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, | |
162 | ri->enc_key->data, ri->enc_key->length) <= 0) | |
163 | goto err; | |
164 | ||
165 | ek = OPENSSL_malloc(eklen); | |
166 | ||
167 | if (ek == NULL) { | |
168 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); | |
169 | goto err; | |
170 | } | |
171 | ||
172 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, | |
173 | ri->enc_key->data, ri->enc_key->length) <= 0) { | |
174 | ret = 0; | |
175 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); | |
176 | goto err; | |
177 | } | |
178 | ||
179 | ret = 1; | |
180 | ||
4b45c6e5 | 181 | OPENSSL_clear_free(*pek, *peklen); |
0f113f3e MC |
182 | *pek = ek; |
183 | *peklen = eklen; | |
184 | ||
185 | err: | |
c5ba2d99 | 186 | EVP_PKEY_CTX_free(pctx); |
b548a1f1 | 187 | if (!ret) |
0f113f3e MC |
188 | OPENSSL_free(ek); |
189 | ||
190 | return ret; | |
191 | } | |
399a6f0b | 192 | |
6b691a5c | 193 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
194 | { |
195 | int i; | |
196 | BIO *out = NULL, *btmp = NULL; | |
197 | X509_ALGOR *xa = NULL; | |
198 | const EVP_CIPHER *evp_cipher = NULL; | |
199 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
200 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
201 | X509_ALGOR *xalg = NULL; | |
202 | PKCS7_RECIP_INFO *ri = NULL; | |
203 | ASN1_OCTET_STRING *os = NULL; | |
204 | ||
c225c3cf EK |
205 | if (p7 == NULL) { |
206 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); | |
207 | return NULL; | |
208 | } | |
209 | /* | |
210 | * The content field in the PKCS7 ContentInfo is optional, but that really | |
211 | * only applies to inner content (precisely, detached signatures). | |
212 | * | |
213 | * When reading content, missing outer content is therefore treated as an | |
214 | * error. | |
215 | * | |
216 | * When creating content, PKCS7_content_new() must be called before | |
217 | * calling this method, so a NULL p7->d is always an error. | |
218 | */ | |
219 | if (p7->d.ptr == NULL) { | |
220 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); | |
221 | return NULL; | |
222 | } | |
223 | ||
0f113f3e MC |
224 | i = OBJ_obj2nid(p7->type); |
225 | p7->state = PKCS7_S_HEADER; | |
226 | ||
227 | switch (i) { | |
228 | case NID_pkcs7_signed: | |
229 | md_sk = p7->d.sign->md_algs; | |
230 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
231 | break; | |
232 | case NID_pkcs7_signedAndEnveloped: | |
233 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
234 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
235 | xalg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
236 | evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; | |
237 | if (evp_cipher == NULL) { | |
238 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
239 | goto err; | |
240 | } | |
241 | break; | |
242 | case NID_pkcs7_enveloped: | |
243 | rsk = p7->d.enveloped->recipientinfo; | |
244 | xalg = p7->d.enveloped->enc_data->algorithm; | |
245 | evp_cipher = p7->d.enveloped->enc_data->cipher; | |
246 | if (evp_cipher == NULL) { | |
247 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); | |
248 | goto err; | |
249 | } | |
250 | break; | |
251 | case NID_pkcs7_digest: | |
252 | xa = p7->d.digest->md; | |
253 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
254 | break; | |
255 | case NID_pkcs7_data: | |
256 | break; | |
257 | default: | |
258 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
259 | goto err; | |
260 | } | |
261 | ||
262 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) | |
263 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) | |
264 | goto err; | |
265 | ||
266 | if (xa && !PKCS7_bio_add_digest(&out, xa)) | |
267 | goto err; | |
268 | ||
269 | if (evp_cipher != NULL) { | |
270 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
271 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
272 | int keylen, ivlen; | |
273 | EVP_CIPHER_CTX *ctx; | |
274 | ||
275 | if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { | |
276 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); | |
277 | goto err; | |
278 | } | |
279 | BIO_get_cipher_ctx(btmp, &ctx); | |
280 | keylen = EVP_CIPHER_key_length(evp_cipher); | |
281 | ivlen = EVP_CIPHER_iv_length(evp_cipher); | |
282 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
283 | if (ivlen > 0) | |
266483d2 | 284 | if (RAND_bytes(iv, ivlen) <= 0) |
0f113f3e MC |
285 | goto err; |
286 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) | |
287 | goto err; | |
288 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
289 | goto err; | |
290 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) | |
291 | goto err; | |
292 | ||
293 | if (ivlen > 0) { | |
294 | if (xalg->parameter == NULL) { | |
295 | xalg->parameter = ASN1_TYPE_new(); | |
296 | if (xalg->parameter == NULL) | |
297 | goto err; | |
298 | } | |
299 | if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
300 | goto err; | |
301 | } | |
302 | ||
303 | /* Lets do the pub key stuff :-) */ | |
304 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
305 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
306 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) | |
307 | goto err; | |
308 | } | |
309 | OPENSSL_cleanse(key, keylen); | |
310 | ||
311 | if (out == NULL) | |
312 | out = btmp; | |
313 | else | |
314 | BIO_push(out, btmp); | |
315 | btmp = NULL; | |
316 | } | |
317 | ||
318 | if (bio == NULL) { | |
319 | if (PKCS7_is_detached(p7)) | |
320 | bio = BIO_new(BIO_s_null()); | |
321 | else if (os && os->length > 0) | |
322 | bio = BIO_new_mem_buf(os->data, os->length); | |
323 | if (bio == NULL) { | |
324 | bio = BIO_new(BIO_s_mem()); | |
325 | if (bio == NULL) | |
326 | goto err; | |
327 | BIO_set_mem_eof_return(bio, 0); | |
328 | } | |
329 | } | |
330 | if (out) | |
331 | BIO_push(out, bio); | |
332 | else | |
333 | out = bio; | |
ca3a82c3 RS |
334 | return out; |
335 | ||
0f113f3e | 336 | err: |
ca3a82c3 RS |
337 | BIO_free_all(out); |
338 | BIO_free_all(btmp); | |
339 | return NULL; | |
0f113f3e | 340 | } |
dfeab068 | 341 | |
8f2e4fdf | 342 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
0f113f3e MC |
343 | { |
344 | int ret; | |
345 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, | |
a8d8e06b | 346 | X509_get_issuer_name(pcert)); |
0f113f3e MC |
347 | if (ret) |
348 | return ret; | |
a8d8e06b DSH |
349 | return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert), |
350 | ri->issuer_and_serial->serial); | |
0f113f3e | 351 | } |
8f2e4fdf | 352 | |
dfeab068 | 353 | /* int */ |
84fa704c | 354 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
0f113f3e MC |
355 | { |
356 | int i, j; | |
357 | BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; | |
358 | X509_ALGOR *xa; | |
359 | ASN1_OCTET_STRING *data_body = NULL; | |
360 | const EVP_MD *evp_md; | |
361 | const EVP_CIPHER *evp_cipher = NULL; | |
362 | EVP_CIPHER_CTX *evp_ctx = NULL; | |
363 | X509_ALGOR *enc_alg = NULL; | |
364 | STACK_OF(X509_ALGOR) *md_sk = NULL; | |
365 | STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; | |
366 | PKCS7_RECIP_INFO *ri = NULL; | |
367 | unsigned char *ek = NULL, *tkey = NULL; | |
368 | int eklen = 0, tkeylen = 0; | |
369 | ||
c225c3cf EK |
370 | if (p7 == NULL) { |
371 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); | |
372 | return NULL; | |
373 | } | |
374 | ||
375 | if (p7->d.ptr == NULL) { | |
376 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
377 | return NULL; | |
378 | } | |
379 | ||
0f113f3e MC |
380 | i = OBJ_obj2nid(p7->type); |
381 | p7->state = PKCS7_S_HEADER; | |
382 | ||
383 | switch (i) { | |
384 | case NID_pkcs7_signed: | |
59302b60 EK |
385 | /* |
386 | * p7->d.sign->contents is a PKCS7 structure consisting of a contentType | |
387 | * field and optional content. | |
388 | * data_body is NULL if that structure has no (=detached) content | |
389 | * or if the contentType is wrong (i.e., not "data"). | |
390 | */ | |
0f113f3e MC |
391 | data_body = PKCS7_get_octet_string(p7->d.sign->contents); |
392 | if (!PKCS7_is_detached(p7) && data_body == NULL) { | |
393 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
394 | PKCS7_R_INVALID_SIGNED_DATA_TYPE); | |
395 | goto err; | |
396 | } | |
397 | md_sk = p7->d.sign->md_algs; | |
398 | break; | |
399 | case NID_pkcs7_signedAndEnveloped: | |
400 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
401 | md_sk = p7->d.signed_and_enveloped->md_algs; | |
59302b60 | 402 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
403 | data_body = p7->d.signed_and_enveloped->enc_data->enc_data; |
404 | enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; | |
405 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
406 | if (evp_cipher == NULL) { | |
407 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
408 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
409 | goto err; | |
410 | } | |
411 | break; | |
412 | case NID_pkcs7_enveloped: | |
413 | rsk = p7->d.enveloped->recipientinfo; | |
414 | enc_alg = p7->d.enveloped->enc_data->algorithm; | |
59302b60 | 415 | /* data_body is NULL if the optional EncryptedContent is missing. */ |
0f113f3e MC |
416 | data_body = p7->d.enveloped->enc_data->enc_data; |
417 | evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); | |
418 | if (evp_cipher == NULL) { | |
419 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
420 | PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
421 | goto err; | |
422 | } | |
423 | break; | |
424 | default: | |
425 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
426 | goto err; | |
427 | } | |
428 | ||
59302b60 EK |
429 | /* Detached content must be supplied via in_bio instead. */ |
430 | if (data_body == NULL && in_bio == NULL) { | |
431 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); | |
432 | goto err; | |
433 | } | |
434 | ||
0f113f3e MC |
435 | /* We will be checking the signature */ |
436 | if (md_sk != NULL) { | |
437 | for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { | |
438 | xa = sk_X509_ALGOR_value(md_sk, i); | |
439 | if ((btmp = BIO_new(BIO_f_md())) == NULL) { | |
440 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
441 | goto err; | |
442 | } | |
443 | ||
444 | j = OBJ_obj2nid(xa->algorithm); | |
445 | evp_md = EVP_get_digestbynid(j); | |
446 | if (evp_md == NULL) { | |
447 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
448 | PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
449 | goto err; | |
450 | } | |
451 | ||
452 | BIO_set_md(btmp, evp_md); | |
453 | if (out == NULL) | |
454 | out = btmp; | |
455 | else | |
456 | BIO_push(out, btmp); | |
457 | btmp = NULL; | |
458 | } | |
459 | } | |
460 | ||
461 | if (evp_cipher != NULL) { | |
0f113f3e MC |
462 | if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
463 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); | |
464 | goto err; | |
465 | } | |
466 | ||
467 | /* | |
468 | * It was encrypted, we need to decrypt the secret key with the | |
469 | * private key | |
470 | */ | |
471 | ||
472 | /* | |
473 | * Find the recipientInfo which matches the passed certificate (if | |
474 | * any) | |
475 | */ | |
476 | ||
477 | if (pcert) { | |
478 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
479 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
480 | if (!pkcs7_cmp_ri(ri, pcert)) | |
481 | break; | |
482 | ri = NULL; | |
483 | } | |
484 | if (ri == NULL) { | |
485 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
486 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
487 | goto err; | |
488 | } | |
489 | } | |
490 | ||
491 | /* If we haven't got a certificate try each ri in turn */ | |
492 | if (pcert == NULL) { | |
493 | /* | |
494 | * Always attempt to decrypt all rinfo even after success as a | |
495 | * defence against MMA timing attacks. | |
496 | */ | |
497 | for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { | |
498 | ri = sk_PKCS7_RECIP_INFO_value(rsk, i); | |
499 | ||
500 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
501 | goto err; | |
502 | ERR_clear_error(); | |
503 | } | |
504 | } else { | |
505 | /* Only exit on fatal errors, not decrypt failure */ | |
506 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) | |
507 | goto err; | |
508 | ERR_clear_error(); | |
509 | } | |
510 | ||
511 | evp_ctx = NULL; | |
512 | BIO_get_cipher_ctx(etmp, &evp_ctx); | |
513 | if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) | |
514 | goto err; | |
515 | if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) | |
516 | goto err; | |
517 | /* Generate random key as MMA defence */ | |
518 | tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); | |
519 | tkey = OPENSSL_malloc(tkeylen); | |
90945fa3 | 520 | if (tkey == NULL) |
0f113f3e MC |
521 | goto err; |
522 | if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) | |
523 | goto err; | |
524 | if (ek == NULL) { | |
525 | ek = tkey; | |
526 | eklen = tkeylen; | |
527 | tkey = NULL; | |
528 | } | |
529 | ||
530 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { | |
531 | /* | |
532 | * Some S/MIME clients don't use the same key and effective key | |
533 | * length. The key length is determined by the size of the | |
534 | * decrypted RSA key. | |
535 | */ | |
536 | if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { | |
537 | /* Use random key as MMA defence */ | |
4b45c6e5 | 538 | OPENSSL_clear_free(ek, eklen); |
0f113f3e MC |
539 | ek = tkey; |
540 | eklen = tkeylen; | |
541 | tkey = NULL; | |
542 | } | |
543 | } | |
544 | /* Clear errors so we don't leak information useful in MMA */ | |
545 | ERR_clear_error(); | |
546 | if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) | |
547 | goto err; | |
548 | ||
4b45c6e5 RS |
549 | OPENSSL_clear_free(ek, eklen); |
550 | ek = NULL; | |
551 | OPENSSL_clear_free(tkey, tkeylen); | |
552 | tkey = NULL; | |
0f113f3e MC |
553 | |
554 | if (out == NULL) | |
555 | out = etmp; | |
556 | else | |
557 | BIO_push(out, etmp); | |
558 | etmp = NULL; | |
559 | } | |
59302b60 | 560 | if (in_bio != NULL) { |
0f113f3e MC |
561 | bio = in_bio; |
562 | } else { | |
0f113f3e MC |
563 | if (data_body->length > 0) |
564 | bio = BIO_new_mem_buf(data_body->data, data_body->length); | |
565 | else { | |
566 | bio = BIO_new(BIO_s_mem()); | |
90945fa3 MC |
567 | if (bio == NULL) |
568 | goto err; | |
0f113f3e MC |
569 | BIO_set_mem_eof_return(bio, 0); |
570 | } | |
571 | if (bio == NULL) | |
572 | goto err; | |
0f113f3e MC |
573 | } |
574 | BIO_push(out, bio); | |
575 | bio = NULL; | |
4b45c6e5 RS |
576 | return out; |
577 | ||
0f113f3e | 578 | err: |
4b45c6e5 RS |
579 | OPENSSL_clear_free(ek, eklen); |
580 | OPENSSL_clear_free(tkey, tkeylen); | |
581 | BIO_free_all(out); | |
582 | BIO_free_all(btmp); | |
583 | BIO_free_all(etmp); | |
584 | BIO_free_all(bio); | |
02e112a8 | 585 | return NULL; |
0f113f3e | 586 | } |
d02b48c6 | 587 | |
c5a55463 | 588 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
0f113f3e MC |
589 | { |
590 | for (;;) { | |
591 | bio = BIO_find_type(bio, BIO_TYPE_MD); | |
592 | if (bio == NULL) { | |
593 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, | |
594 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
595 | return NULL; | |
596 | } | |
597 | BIO_get_md_ctx(bio, pmd); | |
598 | if (*pmd == NULL) { | |
599 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); | |
600 | return NULL; | |
601 | } | |
602 | if (EVP_MD_CTX_type(*pmd) == nid) | |
603 | return bio; | |
604 | bio = BIO_next(bio); | |
605 | } | |
606 | return NULL; | |
607 | } | |
c5a55463 | 608 | |
76fa8f18 | 609 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
0f113f3e MC |
610 | { |
611 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
612 | unsigned int md_len; | |
613 | ||
614 | /* Add signing time if not already present */ | |
615 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { | |
616 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) { | |
617 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
618 | return 0; | |
619 | } | |
620 | } | |
621 | ||
622 | /* Add digest */ | |
623 | if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { | |
624 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); | |
625 | return 0; | |
626 | } | |
627 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { | |
628 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); | |
629 | return 0; | |
630 | } | |
631 | ||
632 | /* Now sign the attributes */ | |
633 | if (!PKCS7_SIGNER_INFO_sign(si)) | |
634 | return 0; | |
635 | ||
636 | return 1; | |
637 | } | |
638 | ||
6b691a5c | 639 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
0f113f3e MC |
640 | { |
641 | int ret = 0; | |
642 | int i, j; | |
643 | BIO *btmp; | |
644 | PKCS7_SIGNER_INFO *si; | |
6e59a892 | 645 | EVP_MD_CTX *mdc, *ctx_tmp; |
0f113f3e MC |
646 | STACK_OF(X509_ATTRIBUTE) *sk; |
647 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; | |
648 | ASN1_OCTET_STRING *os = NULL; | |
649 | ||
c225c3cf EK |
650 | if (p7 == NULL) { |
651 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | if (p7->d.ptr == NULL) { | |
656 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); | |
657 | return 0; | |
658 | } | |
659 | ||
bfb0641f | 660 | ctx_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
661 | if (ctx_tmp == NULL) { |
662 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); | |
663 | return 0; | |
664 | } | |
665 | ||
0f113f3e MC |
666 | i = OBJ_obj2nid(p7->type); |
667 | p7->state = PKCS7_S_HEADER; | |
668 | ||
669 | switch (i) { | |
670 | case NID_pkcs7_data: | |
671 | os = p7->d.data; | |
672 | break; | |
673 | case NID_pkcs7_signedAndEnveloped: | |
674 | /* XXXXXXXXXXXXXXXX */ | |
675 | si_sk = p7->d.signed_and_enveloped->signer_info; | |
676 | os = p7->d.signed_and_enveloped->enc_data->enc_data; | |
90945fa3 | 677 | if (os == NULL) { |
f422a514 | 678 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 679 | if (os == NULL) { |
0f113f3e MC |
680 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
681 | goto err; | |
682 | } | |
683 | p7->d.signed_and_enveloped->enc_data->enc_data = os; | |
684 | } | |
685 | break; | |
686 | case NID_pkcs7_enveloped: | |
687 | /* XXXXXXXXXXXXXXXX */ | |
688 | os = p7->d.enveloped->enc_data->enc_data; | |
90945fa3 | 689 | if (os == NULL) { |
f422a514 | 690 | os = ASN1_OCTET_STRING_new(); |
90945fa3 | 691 | if (os == NULL) { |
0f113f3e MC |
692 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
693 | goto err; | |
694 | } | |
695 | p7->d.enveloped->enc_data->enc_data = os; | |
696 | } | |
697 | break; | |
698 | case NID_pkcs7_signed: | |
699 | si_sk = p7->d.sign->signer_info; | |
700 | os = PKCS7_get_octet_string(p7->d.sign->contents); | |
701 | /* If detached data then the content is excluded */ | |
702 | if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { | |
f422a514 | 703 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 704 | os = NULL; |
0f113f3e MC |
705 | p7->d.sign->contents->d.data = NULL; |
706 | } | |
707 | break; | |
708 | ||
709 | case NID_pkcs7_digest: | |
710 | os = PKCS7_get_octet_string(p7->d.digest->contents); | |
711 | /* If detached data then the content is excluded */ | |
712 | if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { | |
f422a514 | 713 | ASN1_OCTET_STRING_free(os); |
c225c3cf | 714 | os = NULL; |
0f113f3e MC |
715 | p7->d.digest->contents->d.data = NULL; |
716 | } | |
717 | break; | |
718 | ||
719 | default: | |
720 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
721 | goto err; | |
722 | } | |
723 | ||
724 | if (si_sk != NULL) { | |
725 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { | |
726 | si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); | |
727 | if (si->pkey == NULL) | |
728 | continue; | |
729 | ||
730 | j = OBJ_obj2nid(si->digest_alg->algorithm); | |
731 | ||
732 | btmp = bio; | |
733 | ||
734 | btmp = PKCS7_find_digest(&mdc, btmp, j); | |
735 | ||
736 | if (btmp == NULL) | |
737 | goto err; | |
738 | ||
739 | /* | |
740 | * We now have the EVP_MD_CTX, lets do the signing. | |
741 | */ | |
6e59a892 | 742 | if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc)) |
0f113f3e MC |
743 | goto err; |
744 | ||
745 | sk = si->auth_attr; | |
746 | ||
747 | /* | |
748 | * If there are attributes, we add the digest attribute and only | |
749 | * sign the attributes | |
750 | */ | |
751 | if (sk_X509_ATTRIBUTE_num(sk) > 0) { | |
6e59a892 | 752 | if (!do_pkcs7_signed_attrib(si, ctx_tmp)) |
0f113f3e MC |
753 | goto err; |
754 | } else { | |
755 | unsigned char *abuf = NULL; | |
756 | unsigned int abuflen; | |
757 | abuflen = EVP_PKEY_size(si->pkey); | |
758 | abuf = OPENSSL_malloc(abuflen); | |
90945fa3 | 759 | if (abuf == NULL) |
0f113f3e MC |
760 | goto err; |
761 | ||
6e59a892 | 762 | if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) { |
d54ac5c4 | 763 | OPENSSL_free(abuf); |
0f113f3e MC |
764 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); |
765 | goto err; | |
766 | } | |
767 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); | |
768 | } | |
769 | } | |
770 | } else if (i == NID_pkcs7_digest) { | |
771 | unsigned char md_data[EVP_MAX_MD_SIZE]; | |
772 | unsigned int md_len; | |
773 | if (!PKCS7_find_digest(&mdc, bio, | |
774 | OBJ_obj2nid(p7->d.digest->md->algorithm))) | |
775 | goto err; | |
776 | if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) | |
777 | goto err; | |
d356dc56 MC |
778 | if (!ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len)) |
779 | goto err; | |
0f113f3e MC |
780 | } |
781 | ||
c225c3cf | 782 | if (!PKCS7_is_detached(p7)) { |
0f113f3e | 783 | /* |
c225c3cf EK |
784 | * NOTE(emilia): I think we only reach os == NULL here because detached |
785 | * digested data support is broken. | |
0f113f3e | 786 | */ |
c225c3cf EK |
787 | if (os == NULL) |
788 | goto err; | |
789 | if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { | |
790 | char *cont; | |
791 | long contlen; | |
792 | btmp = BIO_find_type(bio, BIO_TYPE_MEM); | |
793 | if (btmp == NULL) { | |
794 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
795 | goto err; | |
796 | } | |
797 | contlen = BIO_get_mem_data(btmp, &cont); | |
798 | /* | |
799 | * Mark the BIO read only then we can use its copy of the data | |
800 | * instead of making an extra copy. | |
801 | */ | |
802 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); | |
803 | BIO_set_mem_eof_return(btmp, 0); | |
804 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); | |
805 | } | |
0f113f3e MC |
806 | } |
807 | ret = 1; | |
808 | err: | |
bfb0641f | 809 | EVP_MD_CTX_free(ctx_tmp); |
0f113f3e MC |
810 | return (ret); |
811 | } | |
d02b48c6 | 812 | |
76fa8f18 | 813 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
0f113f3e | 814 | { |
6e59a892 | 815 | EVP_MD_CTX *mctx; |
0f113f3e MC |
816 | EVP_PKEY_CTX *pctx; |
817 | unsigned char *abuf = NULL; | |
818 | int alen; | |
819 | size_t siglen; | |
820 | const EVP_MD *md = NULL; | |
821 | ||
822 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); | |
823 | if (md == NULL) | |
824 | return 0; | |
825 | ||
bfb0641f | 826 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
827 | if (mctx == NULL) { |
828 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE); | |
829 | goto err; | |
830 | } | |
831 | ||
832 | if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0) | |
0f113f3e MC |
833 | goto err; |
834 | ||
835 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
836 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { | |
837 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
838 | goto err; | |
839 | } | |
840 | ||
841 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, | |
842 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); | |
843 | if (!abuf) | |
844 | goto err; | |
6e59a892 | 845 | if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0) |
0f113f3e MC |
846 | goto err; |
847 | OPENSSL_free(abuf); | |
848 | abuf = NULL; | |
6e59a892 | 849 | if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0) |
0f113f3e MC |
850 | goto err; |
851 | abuf = OPENSSL_malloc(siglen); | |
90945fa3 | 852 | if (abuf == NULL) |
0f113f3e | 853 | goto err; |
6e59a892 | 854 | if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0) |
0f113f3e MC |
855 | goto err; |
856 | ||
857 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, | |
858 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { | |
859 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); | |
860 | goto err; | |
861 | } | |
862 | ||
bfb0641f | 863 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
864 | |
865 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); | |
866 | ||
867 | return 1; | |
868 | ||
869 | err: | |
b548a1f1 | 870 | OPENSSL_free(abuf); |
bfb0641f | 871 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
872 | return 0; |
873 | ||
874 | } | |
76fa8f18 | 875 | |
6b691a5c | 876 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
0f113f3e MC |
877 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
878 | { | |
879 | PKCS7_ISSUER_AND_SERIAL *ias; | |
880 | int ret = 0, i; | |
881 | STACK_OF(X509) *cert; | |
882 | X509 *x509; | |
883 | ||
c225c3cf EK |
884 | if (p7 == NULL) { |
885 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); | |
886 | return 0; | |
887 | } | |
888 | ||
889 | if (p7->d.ptr == NULL) { | |
890 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); | |
891 | return 0; | |
892 | } | |
893 | ||
0f113f3e MC |
894 | if (PKCS7_type_is_signed(p7)) { |
895 | cert = p7->d.sign->cert; | |
896 | } else if (PKCS7_type_is_signedAndEnveloped(p7)) { | |
897 | cert = p7->d.signed_and_enveloped->cert; | |
898 | } else { | |
899 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
900 | goto err; | |
901 | } | |
902 | /* XXXXXXXXXXXXXXXXXXXXXXX */ | |
903 | ias = si->issuer_and_serial; | |
904 | ||
905 | x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); | |
906 | ||
907 | /* were we able to find the cert in passed to us */ | |
908 | if (x509 == NULL) { | |
909 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, | |
910 | PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
911 | goto err; | |
912 | } | |
913 | ||
914 | /* Lets verify */ | |
915 | if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { | |
916 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
917 | goto err; | |
918 | } | |
919 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); | |
920 | i = X509_verify_cert(ctx); | |
921 | if (i <= 0) { | |
922 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); | |
923 | X509_STORE_CTX_cleanup(ctx); | |
924 | goto err; | |
925 | } | |
926 | X509_STORE_CTX_cleanup(ctx); | |
927 | ||
928 | return PKCS7_signatureVerify(bio, p7, si, x509); | |
929 | err: | |
930 | return ret; | |
931 | } | |
170afce5 DSH |
932 | |
933 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, | |
0f113f3e | 934 | X509 *x509) |
dfeab068 | 935 | { |
0f113f3e | 936 | ASN1_OCTET_STRING *os; |
6e59a892 | 937 | EVP_MD_CTX *mdc_tmp, *mdc; |
0f113f3e MC |
938 | int ret = 0, i; |
939 | int md_type; | |
940 | STACK_OF(X509_ATTRIBUTE) *sk; | |
941 | BIO *btmp; | |
942 | EVP_PKEY *pkey; | |
943 | ||
bfb0641f | 944 | mdc_tmp = EVP_MD_CTX_new(); |
6e59a892 RL |
945 | if (mdc_tmp == NULL) { |
946 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE); | |
947 | goto err; | |
948 | } | |
0f113f3e MC |
949 | |
950 | if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { | |
951 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); | |
952 | goto err; | |
953 | } | |
954 | ||
955 | md_type = OBJ_obj2nid(si->digest_alg->algorithm); | |
956 | ||
957 | btmp = bio; | |
958 | for (;;) { | |
959 | if ((btmp == NULL) || | |
960 | ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { | |
961 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
962 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
963 | goto err; | |
964 | } | |
965 | BIO_get_md_ctx(btmp, &mdc); | |
966 | if (mdc == NULL) { | |
967 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); | |
968 | goto err; | |
969 | } | |
970 | if (EVP_MD_CTX_type(mdc) == md_type) | |
971 | break; | |
972 | /* | |
973 | * Workaround for some broken clients that put the signature OID | |
974 | * instead of the digest OID in digest_alg->algorithm | |
975 | */ | |
976 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) | |
977 | break; | |
978 | btmp = BIO_next(btmp); | |
979 | } | |
980 | ||
981 | /* | |
982 | * mdc is the digest ctx that we want, unless there are attributes, in | |
983 | * which case the digest is the signed attributes | |
984 | */ | |
6e59a892 | 985 | if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc)) |
0f113f3e MC |
986 | goto err; |
987 | ||
988 | sk = si->auth_attr; | |
989 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { | |
990 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; | |
991 | unsigned int md_len; | |
992 | int alen; | |
993 | ASN1_OCTET_STRING *message_digest; | |
994 | ||
6e59a892 | 995 | if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len)) |
0f113f3e MC |
996 | goto err; |
997 | message_digest = PKCS7_digest_from_attributes(sk); | |
998 | if (!message_digest) { | |
999 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, | |
1000 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
1001 | goto err; | |
1002 | } | |
1003 | if ((message_digest->length != (int)md_len) || | |
1004 | (memcmp(message_digest->data, md_dat, md_len))) { | |
0f113f3e MC |
1005 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
1006 | ret = -1; | |
1007 | goto err; | |
1008 | } | |
1009 | ||
6e59a892 | 1010 | if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL)) |
0f113f3e MC |
1011 | goto err; |
1012 | ||
1013 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, | |
1014 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); | |
1015 | if (alen <= 0) { | |
1016 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); | |
1017 | ret = -1; | |
1018 | goto err; | |
1019 | } | |
6e59a892 | 1020 | if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen)) |
0f113f3e MC |
1021 | goto err; |
1022 | ||
1023 | OPENSSL_free(abuf); | |
1024 | } | |
1025 | ||
1026 | os = si->enc_digest; | |
8382fd3a | 1027 | pkey = X509_get0_pubkey(x509); |
0f113f3e MC |
1028 | if (!pkey) { |
1029 | ret = -1; | |
1030 | goto err; | |
1031 | } | |
1032 | ||
6e59a892 | 1033 | i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey); |
0f113f3e MC |
1034 | if (i <= 0) { |
1035 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); | |
1036 | ret = -1; | |
1037 | goto err; | |
c5ba2d99 RS |
1038 | } |
1039 | ret = 1; | |
0f113f3e | 1040 | err: |
bfb0641f | 1041 | EVP_MD_CTX_free(mdc_tmp); |
0f113f3e MC |
1042 | return (ret); |
1043 | } | |
d02b48c6 | 1044 | |
6b691a5c | 1045 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
0f113f3e MC |
1046 | { |
1047 | STACK_OF(PKCS7_RECIP_INFO) *rsk; | |
1048 | PKCS7_RECIP_INFO *ri; | |
1049 | int i; | |
1050 | ||
1051 | i = OBJ_obj2nid(p7->type); | |
1052 | if (i != NID_pkcs7_signedAndEnveloped) | |
1053 | return NULL; | |
1054 | if (p7->d.signed_and_enveloped == NULL) | |
1055 | return NULL; | |
1056 | rsk = p7->d.signed_and_enveloped->recipientinfo; | |
1057 | if (rsk == NULL) | |
1058 | return NULL; | |
0f113f3e MC |
1059 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) |
1060 | return (NULL); | |
1061 | ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); | |
1062 | return (ri->issuer_and_serial); | |
1063 | } | |
dfeab068 | 1064 | |
6b691a5c | 1065 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1066 | { |
1067 | return (get_attribute(si->auth_attr, nid)); | |
1068 | } | |
dfeab068 | 1069 | |
6b691a5c | 1070 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
0f113f3e MC |
1071 | { |
1072 | return (get_attribute(si->unauth_attr, nid)); | |
1073 | } | |
dfeab068 | 1074 | |
b6436ff2 | 1075 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
0f113f3e | 1076 | { |
9b0a4531 | 1077 | int idx; |
0f113f3e | 1078 | X509_ATTRIBUTE *xa; |
9b0a4531 DSH |
1079 | idx = X509at_get_attr_by_NID(sk, nid, -1); |
1080 | xa = X509at_get_attr(sk, idx); | |
1081 | return X509_ATTRIBUTE_get0_type(xa, 0); | |
0f113f3e | 1082 | } |
dfeab068 | 1083 | |
b6436ff2 | 1084 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
10243d97 | 1085 | { |
0f113f3e | 1086 | ASN1_TYPE *astype; |
75ebbd9a | 1087 | if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL) |
0f113f3e MC |
1088 | return NULL; |
1089 | return astype->value.octet_string; | |
10243d97 | 1090 | } |
dfeab068 | 1091 | |
b6436ff2 | 1092 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
0f113f3e MC |
1093 | STACK_OF(X509_ATTRIBUTE) *sk) |
1094 | { | |
1095 | int i; | |
1096 | ||
222561fe | 1097 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1098 | p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1099 | if (p7si->auth_attr == NULL) | |
1100 | return 0; | |
1101 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1102 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, | |
1103 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1104 | (sk, i)))) | |
1105 | == NULL) | |
1106 | return (0); | |
1107 | } | |
1108 | return (1); | |
1109 | } | |
1110 | ||
1111 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, | |
1112 | STACK_OF(X509_ATTRIBUTE) *sk) | |
1113 | { | |
1114 | int i; | |
1115 | ||
222561fe | 1116 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); |
0f113f3e MC |
1117 | p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); |
1118 | if (p7si->unauth_attr == NULL) | |
1119 | return 0; | |
1120 | for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { | |
1121 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, | |
1122 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value | |
1123 | (sk, i)))) | |
1124 | == NULL) | |
1125 | return (0); | |
1126 | } | |
1127 | return (1); | |
1128 | } | |
dfeab068 | 1129 | |
6b691a5c | 1130 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1131 | void *value) |
1132 | { | |
1133 | return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); | |
1134 | } | |
dfeab068 | 1135 | |
6b691a5c | 1136 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
0f113f3e MC |
1137 | void *value) |
1138 | { | |
1139 | return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); | |
1140 | } | |
dfeab068 | 1141 | |
b6436ff2 | 1142 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
0f113f3e MC |
1143 | void *value) |
1144 | { | |
1145 | X509_ATTRIBUTE *attr = NULL; | |
1146 | ||
1147 | if (*sk == NULL) { | |
75ebbd9a | 1148 | if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL) |
0f113f3e MC |
1149 | return 0; |
1150 | new_attrib: | |
75ebbd9a | 1151 | if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL) |
0f113f3e MC |
1152 | return 0; |
1153 | if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { | |
1154 | X509_ATTRIBUTE_free(attr); | |
1155 | return 0; | |
1156 | } | |
1157 | } else { | |
1158 | int i; | |
1159 | ||
1160 | for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { | |
1161 | attr = sk_X509_ATTRIBUTE_value(*sk, i); | |
9b0a4531 | 1162 | if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) { |
0f113f3e MC |
1163 | X509_ATTRIBUTE_free(attr); |
1164 | attr = X509_ATTRIBUTE_create(nid, atrtype, value); | |
1165 | if (attr == NULL) | |
1166 | return 0; | |
1167 | if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { | |
1168 | X509_ATTRIBUTE_free(attr); | |
1169 | return 0; | |
1170 | } | |
1171 | goto end; | |
1172 | } | |
1173 | } | |
1174 | goto new_attrib; | |
1175 | } | |
1176 | end: | |
1177 | return (1); | |
1178 | } |