source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/pkcs7/pk7_doit.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 33.7 KB
Line 
1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/rand.h>
13#include <openssl/objects.h>
14#include <openssl/x509.h>
15#include <openssl/x509v3.h>
16#include <openssl/err.h>
17
18static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
19 void *value);
20static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
21
22static 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}
44
45static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
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}
54
55static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
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:
82 BIO_free(btmp);
83 return 0;
84
85}
86
87static 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;
95
96 pkey = X509_get0_pubkey(ri->cert);
97
98 if (!pkey)
99 return 0;
100
101 pctx = EVP_PKEY_CTX_new(pkey, NULL);
102 if (!pctx)
103 return 0;
104
105 if (EVP_PKEY_encrypt_init(pctx) <= 0)
106 goto err;
107
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 }
113
114 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
115 goto err;
116
117 ek = OPENSSL_malloc(eklen);
118
119 if (ek == NULL) {
120 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
121 goto err;
122 }
123
124 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
125 goto err;
126
127 ASN1_STRING_set0(ri->enc_key, ek, eklen);
128 ek = NULL;
129
130 ret = 1;
131
132 err:
133 EVP_PKEY_CTX_free(pctx);
134 OPENSSL_free(ek);
135 return ret;
136
137}
138
139static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
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
181 OPENSSL_clear_free(*pek, *peklen);
182 *pek = ek;
183 *peklen = eklen;
184
185 err:
186 EVP_PKEY_CTX_free(pctx);
187 if (!ret)
188 OPENSSL_free(ek);
189
190 return ret;
191}
192
193BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
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
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
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)
284 if (RAND_bytes(iv, ivlen) <= 0)
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;
334 return out;
335
336 err:
337 BIO_free_all(out);
338 BIO_free_all(btmp);
339 return NULL;
340}
341
342static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
343{
344 int ret;
345 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
346 X509_get_issuer_name(pcert));
347 if (ret)
348 return ret;
349 return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert),
350 ri->issuer_and_serial->serial);
351}
352
353/* int */
354BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
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
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
380 i = OBJ_obj2nid(p7->type);
381 p7->state = PKCS7_S_HEADER;
382
383 switch (i) {
384 case NID_pkcs7_signed:
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 */
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;
402 /* data_body is NULL if the optional EncryptedContent is missing. */
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;
415 /* data_body is NULL if the optional EncryptedContent is missing. */
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
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
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) {
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);
520 if (tkey == NULL)
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 */
538 OPENSSL_clear_free(ek, eklen);
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
549 OPENSSL_clear_free(ek, eklen);
550 ek = NULL;
551 OPENSSL_clear_free(tkey, tkeylen);
552 tkey = NULL;
553
554 if (out == NULL)
555 out = etmp;
556 else
557 BIO_push(out, etmp);
558 etmp = NULL;
559 }
560 if (in_bio != NULL) {
561 bio = in_bio;
562 } else {
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());
567 if (bio == NULL)
568 goto err;
569 BIO_set_mem_eof_return(bio, 0);
570 }
571 if (bio == NULL)
572 goto err;
573 }
574 BIO_push(out, bio);
575 bio = NULL;
576 return out;
577
578 err:
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);
585 return NULL;
586}
587
588static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
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}
608
609static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
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
639int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
640{
641 int ret = 0;
642 int i, j;
643 BIO *btmp;
644 PKCS7_SIGNER_INFO *si;
645 EVP_MD_CTX *mdc, *ctx_tmp;
646 STACK_OF(X509_ATTRIBUTE) *sk;
647 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
648 ASN1_OCTET_STRING *os = NULL;
649
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
660 ctx_tmp = EVP_MD_CTX_new();
661 if (ctx_tmp == NULL) {
662 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
663 return 0;
664 }
665
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;
677 if (os == NULL) {
678 os = ASN1_OCTET_STRING_new();
679 if (os == NULL) {
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;
689 if (os == NULL) {
690 os = ASN1_OCTET_STRING_new();
691 if (os == NULL) {
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) {
703 ASN1_OCTET_STRING_free(os);
704 os = NULL;
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) {
713 ASN1_OCTET_STRING_free(os);
714 os = NULL;
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 */
742 if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc))
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) {
752 if (!do_pkcs7_signed_attrib(si, ctx_tmp))
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);
759 if (abuf == NULL)
760 goto err;
761
762 if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) {
763 OPENSSL_free(abuf);
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;
778 if (!ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len))
779 goto err;
780 }
781
782 if (!PKCS7_is_detached(p7)) {
783 /*
784 * NOTE(emilia): I think we only reach os == NULL here because detached
785 * digested data support is broken.
786 */
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 }
806 }
807 ret = 1;
808 err:
809 EVP_MD_CTX_free(ctx_tmp);
810 return (ret);
811}
812
813int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
814{
815 EVP_MD_CTX *mctx;
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
826 mctx = EVP_MD_CTX_new();
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)
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;
845 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
846 goto err;
847 OPENSSL_free(abuf);
848 abuf = NULL;
849 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
850 goto err;
851 abuf = OPENSSL_malloc(siglen);
852 if (abuf == NULL)
853 goto err;
854 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
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
863 EVP_MD_CTX_free(mctx);
864
865 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
866
867 return 1;
868
869 err:
870 OPENSSL_free(abuf);
871 EVP_MD_CTX_free(mctx);
872 return 0;
873
874}
875
876int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
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
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
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}
932
933int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
934 X509 *x509)
935{
936 ASN1_OCTET_STRING *os;
937 EVP_MD_CTX *mdc_tmp, *mdc;
938 int ret = 0, i;
939 int md_type;
940 STACK_OF(X509_ATTRIBUTE) *sk;
941 BIO *btmp;
942 EVP_PKEY *pkey;
943
944 mdc_tmp = EVP_MD_CTX_new();
945 if (mdc_tmp == NULL) {
946 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE);
947 goto err;
948 }
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 */
985 if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc))
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
995 if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len))
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))) {
1005 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1006 ret = -1;
1007 goto err;
1008 }
1009
1010 if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL))
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 }
1020 if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen))
1021 goto err;
1022
1023 OPENSSL_free(abuf);
1024 }
1025
1026 os = si->enc_digest;
1027 pkey = X509_get0_pubkey(x509);
1028 if (!pkey) {
1029 ret = -1;
1030 goto err;
1031 }
1032
1033 i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey);
1034 if (i <= 0) {
1035 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1036 ret = -1;
1037 goto err;
1038 }
1039 ret = 1;
1040 err:
1041 EVP_MD_CTX_free(mdc_tmp);
1042 return (ret);
1043}
1044
1045PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
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;
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}
1064
1065ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1066{
1067 return (get_attribute(si->auth_attr, nid));
1068}
1069
1070ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1071{
1072 return (get_attribute(si->unauth_attr, nid));
1073}
1074
1075static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1076{
1077 int idx;
1078 X509_ATTRIBUTE *xa;
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);
1082}
1083
1084ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1085{
1086 ASN1_TYPE *astype;
1087 if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL)
1088 return NULL;
1089 return astype->value.octet_string;
1090}
1091
1092int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1093 STACK_OF(X509_ATTRIBUTE) *sk)
1094{
1095 int i;
1096
1097 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
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
1111int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1112 STACK_OF(X509_ATTRIBUTE) *sk)
1113{
1114 int i;
1115
1116 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
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}
1129
1130int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1131 void *value)
1132{
1133 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1134}
1135
1136int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1137 void *value)
1138{
1139 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1140}
1141
1142static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1143 void *value)
1144{
1145 X509_ATTRIBUTE *attr = NULL;
1146
1147 if (*sk == NULL) {
1148 if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
1149 return 0;
1150 new_attrib:
1151 if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL)
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);
1162 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
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}
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