]> git.ipfire.org Git - thirdparty/openssl.git/blame - crypto/cms/cms_env.c
projects / thirdparty / openssl.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
free NULL cleanup 8
[thirdparty/openssl.git] / crypto / cms / cms_env.c
CommitLineData
8931b30d 1/* crypto/cms/cms_env.c */
0f113f3e
MC		 2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
8931b30d
DSH		 4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
0f113f3e 14 * notice, this list of conditions and the following disclaimer.
8931b30d
DSH		 15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55#include "cryptlib.h"
56#include <openssl/asn1t.h>
57#include <openssl/pem.h>
58#include <openssl/x509v3.h>
59#include <openssl/err.h>
60#include <openssl/cms.h>
5c4436c9 61#include <openssl/rand.h>
6e3bc4f0 62#include <openssl/aes.h>
8931b30d 63#include "cms_lcl.h"
5fe736e5 64#include "internal/asn1_int.h"
8931b30d
DSH		 65
66/* CMS EnvelopedData Utilities */
67
68DECLARE_ASN1_ITEM(CMS_EnvelopedData)
8931b30d 69DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo)
c36e936b
DSH		 70DECLARE_ASN1_ITEM(CMS_KEKRecipientInfo)
71DECLARE_ASN1_ITEM(CMS_OtherKeyAttribute)
8931b30d 72
8931b30d
DSH		 73DECLARE_STACK_OF(CMS_RecipientInfo)
74
d2a53c22 75CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms)
0f113f3e
MC		 76{
77 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) {
78 CMSerr(CMS_F_CMS_GET0_ENVELOPED,
79 CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
80 return NULL;
81 }
82 return cms->d.envelopedData;
83}
8931b30d
DSH		 84
85static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms)
0f113f3e
MC		 86{
87 if (cms->d.other == NULL) {
88 cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData);
89 if (!cms->d.envelopedData) {
90 CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT, ERR_R_MALLOC_FAILURE);
91 return NULL;
92 }
93 cms->d.envelopedData->version = 0;
94 cms->d.envelopedData->encryptedContentInfo->contentType =
95 OBJ_nid2obj(NID_pkcs7_data);
96 ASN1_OBJECT_free(cms->contentType);
97 cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
98 return cms->d.envelopedData;
99 }
100 return cms_get0_enveloped(cms);
101}
8931b30d 102
17c2764d 103int cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
0f113f3e
MC		 104{
105 EVP_PKEY *pkey;
106 int i;
107 if (ri->type == CMS_RECIPINFO_TRANS)
108 pkey = ri->d.ktri->pkey;
109 else if (ri->type == CMS_RECIPINFO_AGREE) {
110 EVP_PKEY_CTX *pctx = ri->d.kari->pctx;
111 if (!pctx)
112 return 0;
113 pkey = EVP_PKEY_CTX_get0_pkey(pctx);
114 if (!pkey)
115 return 0;
116 } else
117 return 0;
118 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
119 return 1;
120 i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri);
121 if (i == -2) {
122 CMSerr(CMS_F_CMS_ENV_ASN1_CTRL,
123 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
124 return 0;
125 }
126 if (i <= 0) {
127 CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, CMS_R_CTRL_FAILURE);
128 return 0;
129 }
130 return 1;
131}
e365352d 132
4f1aa191 133STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
0f113f3e
MC		 134{
135 CMS_EnvelopedData *env;
136 env = cms_get0_enveloped(cms);
137 if (!env)
138 return NULL;
139 return env->recipientInfos;
140}
4f1aa191
DSH		 141
142int CMS_RecipientInfo_type(CMS_RecipientInfo *ri)
0f113f3e
MC		 143{
144 return ri->type;
145}
4f1aa191 146
e365352d 147EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri)
0f113f3e
MC		 148{
149 if (ri->type == CMS_RECIPINFO_TRANS)
150 return ri->d.ktri->pctx;
151 else if (ri->type == CMS_RECIPINFO_AGREE)
152 return ri->d.kari->pctx;
153 return NULL;
154}
e365352d 155
761ffa72 156CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher)
0f113f3e
MC		 157{
158 CMS_ContentInfo *cms;
159 CMS_EnvelopedData *env;
160 cms = CMS_ContentInfo_new();
161 if (!cms)
162 goto merr;
163 env = cms_enveloped_data_init(cms);
164 if (!env)
165 goto merr;
166 if (!cms_EncryptedContent_init(env->encryptedContentInfo,
167 cipher, NULL, 0))
168 goto merr;
169 return cms;
170 merr:
171 if (cms)
172 CMS_ContentInfo_free(cms);
173 CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE, ERR_R_MALLOC_FAILURE);
174 return NULL;
175}
761ffa72 176
ab124380
DSH		 177/* Key Transport Recipient Info (KTRI) routines */
178
17c2764d 179/* Initialise a ktri based on passed certificate and key */
ab124380 180
17c2764d 181static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip,
0f113f3e
MC		 182 EVP_PKEY *pk, unsigned int flags)
183{
184 CMS_KeyTransRecipientInfo *ktri;
185 int idtype;
186
187 ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
188 if (!ri->d.ktri)
189 return 0;
190 ri->type = CMS_RECIPINFO_TRANS;
191
192 ktri = ri->d.ktri;
193
194 if (flags & CMS_USE_KEYID) {
195 ktri->version = 2;
196 idtype = CMS_RECIPINFO_KEYIDENTIFIER;
197 } else {
198 ktri->version = 0;
199 idtype = CMS_RECIPINFO_ISSUER_SERIAL;
200 }
201
202 /*
203 * Not a typo: RecipientIdentifier and SignerIdentifier are the same
204 * structure.
205 */
206
207 if (!cms_set1_SignerIdentifier(ktri->rid, recip, idtype))
208 return 0;
209
210 CRYPTO_add(&recip->references, 1, CRYPTO_LOCK_X509);
211 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
212 ktri->pkey = pk;
213 ktri->recip = recip;
214
215 if (flags & CMS_KEY_PARAM) {
216 ktri->pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
217 if (!ktri->pctx)
218 return 0;
219 if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0)
220 return 0;
221 } else if (!cms_env_asn1_ctrl(ri, 0))
222 return 0;
223 return 1;
224}
225
226/*
227 * Add a recipient certificate using appropriate type of RecipientInfo
17c2764d
DSH		 228 */
229
230CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms,
0f113f3e
MC		 231 X509 *recip, unsigned int flags)
232{
233 CMS_RecipientInfo *ri = NULL;
234 CMS_EnvelopedData *env;
235 EVP_PKEY *pk = NULL;
236 env = cms_get0_enveloped(cms);
237 if (!env)
238 goto err;
239
240 /* Initialize recipient info */
241 ri = M_ASN1_new_of(CMS_RecipientInfo);
242 if (!ri)
243 goto merr;
244
245 pk = X509_get_pubkey(recip);
246 if (!pk) {
247 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, CMS_R_ERROR_GETTING_PUBLIC_KEY);
248 goto err;
249 }
250
251 switch (cms_pkey_get_ri_type(pk)) {
252
253 case CMS_RECIPINFO_TRANS:
254 if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags))
255 goto err;
256 break;
257
258 case CMS_RECIPINFO_AGREE:
259 if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags))
260 goto err;
261 break;
262
263 default:
264 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
265 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
266 goto err;
267
268 }
269
270 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
271 goto merr;
272
273 EVP_PKEY_free(pk);
274
275 return ri;
276
277 merr:
278 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
279 err:
2ace7450 280 M_ASN1_free_of(ri, CMS_RecipientInfo);
c5ba2d99 281 EVP_PKEY_free(pk);
0f113f3e
MC		 282 return NULL;
283
284}
8931b30d
DSH		 285
286int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
0f113f3e
MC		 287 EVP_PKEY **pk, X509 **recip,
288 X509_ALGOR **palg)
289{
290 CMS_KeyTransRecipientInfo *ktri;
291 if (ri->type != CMS_RECIPINFO_TRANS) {
292 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
293 CMS_R_NOT_KEY_TRANSPORT);
294 return 0;
295 }
296
297 ktri = ri->d.ktri;
298
299 if (pk)
300 *pk = ktri->pkey;
301 if (recip)
302 *recip = ktri->recip;
303 if (palg)
304 *palg = ktri->keyEncryptionAlgorithm;
305 return 1;
306}
8931b30d
DSH		 307
308int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
0f113f3e
MC		 309 ASN1_OCTET_STRING **keyid,
310 X509_NAME **issuer,
311 ASN1_INTEGER **sno)
312{
313 CMS_KeyTransRecipientInfo *ktri;
314 if (ri->type != CMS_RECIPINFO_TRANS) {
315 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
316 CMS_R_NOT_KEY_TRANSPORT);
317 return 0;
318 }
319 ktri = ri->d.ktri;
320
321 return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
322}
8931b30d
DSH		 323
324int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
0f113f3e
MC		 325{
326 if (ri->type != CMS_RECIPINFO_TRANS) {
327 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
328 CMS_R_NOT_KEY_TRANSPORT);
329 return -2;
330 }
331 return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
332}
4f1aa191 333
6e3bc4f0 334int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
0f113f3e
MC		 335{
336 if (ri->type != CMS_RECIPINFO_TRANS) {
337 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
338 return 0;
339 }
340 ri->d.ktri->pkey = pkey;
341 return 1;
342}
6e3bc4f0 343
761ffa72
DSH		 344/* Encrypt content key in key transport recipient info */
345
346static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
0f113f3e
MC		 347 CMS_RecipientInfo *ri)
348{
349 CMS_KeyTransRecipientInfo *ktri;
350 CMS_EncryptedContentInfo *ec;
351 EVP_PKEY_CTX *pctx;
352 unsigned char *ek = NULL;
353 size_t eklen;
354
355 int ret = 0;
356
357 if (ri->type != CMS_RECIPINFO_TRANS) {
358 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
359 return 0;
360 }
361 ktri = ri->d.ktri;
362 ec = cms->d.envelopedData->encryptedContentInfo;
363
364 pctx = ktri->pctx;
365
366 if (pctx) {
367 if (!cms_env_asn1_ctrl(ri, 0))
368 goto err;
369 } else {
370 pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
371 if (!pctx)
372 return 0;
373
374 if (EVP_PKEY_encrypt_init(pctx) <= 0)
375 goto err;
376 }
377
378 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
379 EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
380 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
381 goto err;
382 }
383
384 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
385 goto err;
386
387 ek = OPENSSL_malloc(eklen);
388
389 if (ek == NULL) {
390 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
391 goto err;
392 }
393
394 if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
395 goto err;
396
397 ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
398 ek = NULL;
399
400 ret = 1;
401
402 err:
403 if (pctx) {
404 EVP_PKEY_CTX_free(pctx);
405 ktri->pctx = NULL;
406 }
407 if (ek)
408 OPENSSL_free(ek);
409 return ret;
410
411}
761ffa72 412
ab124380
DSH		 413/* Decrypt content key from KTRI */
414
6e3bc4f0 415static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
0f113f3e
MC		 416 CMS_RecipientInfo *ri)
417{
418 CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
419 EVP_PKEY *pkey = ktri->pkey;
420 unsigned char *ek = NULL;
421 size_t eklen;
422 int ret = 0;
423 CMS_EncryptedContentInfo *ec;
424 ec = cms->d.envelopedData->encryptedContentInfo;
425
426 if (ktri->pkey == NULL) {
427 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
428 return 0;
429 }
430
431 ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
432 if (!ktri->pctx)
433 return 0;
434
435 if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
436 goto err;
437
438 if (!cms_env_asn1_ctrl(ri, 1))
439 goto err;
440
441 if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
442 EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
443 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
444 goto err;
445 }
446
447 if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
448 ktri->encryptedKey->data,
449 ktri->encryptedKey->length) <= 0)
450 goto err;
451
452 ek = OPENSSL_malloc(eklen);
453
454 if (ek == NULL) {
455 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
456 goto err;
457 }
458
459 if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
460 ktri->encryptedKey->data,
461 ktri->encryptedKey->length) <= 0) {
462 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
463 goto err;
464 }
465
466 ret = 1;
467
468 if (ec->key) {
469 OPENSSL_cleanse(ec->key, ec->keylen);
470 OPENSSL_free(ec->key);
471 }
472
473 ec->key = ek;
474 ec->keylen = eklen;
475
476 err:
c5ba2d99
RS		 477 EVP_PKEY_CTX_free(ktri->pctx);
478 ktri->pctx = NULL;
0f113f3e
MC		 479 if (!ret && ek)
480 OPENSSL_free(ek);
481
482 return ret;
483}
4f1aa191 484
ab124380
DSH		 485/* Key Encrypted Key (KEK) RecipientInfo routines */
486
0f113f3e
MC		 487int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
488 const unsigned char *id, size_t idlen)
489{
490 ASN1_OCTET_STRING tmp_os;
491 CMS_KEKRecipientInfo *kekri;
492 if (ri->type != CMS_RECIPINFO_KEK) {
493 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
494 return -2;
495 }
496 kekri = ri->d.kekri;
497 tmp_os.type = V_ASN1_OCTET_STRING;
498 tmp_os.flags = 0;
499 tmp_os.data = (unsigned char *)id;
500 tmp_os.length = (int)idlen;
501 return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
502}
eeb9cdfc 503
ab124380
DSH		 504/* For now hard code AES key wrap info */
505
506static size_t aes_wrap_keylen(int nid)
0f113f3e
MC		 507{
508 switch (nid) {
509 case NID_id_aes128_wrap:
510 return 16;
ab124380 511
0f113f3e
MC		 512 case NID_id_aes192_wrap:
513 return 24;
ab124380 514
0f113f3e
MC		 515 case NID_id_aes256_wrap:
516 return 32;
ab124380 517
0f113f3e
MC		 518 default:
519 return 0;
520 }
521}
ab124380
DSH		 522
523CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
0f113f3e
MC		 524 unsigned char *key, size_t keylen,
525 unsigned char *id, size_t idlen,
526 ASN1_GENERALIZEDTIME *date,
527 ASN1_OBJECT *otherTypeId,
528 ASN1_TYPE *otherType)
529{
530 CMS_RecipientInfo *ri = NULL;
531 CMS_EnvelopedData *env;
532 CMS_KEKRecipientInfo *kekri;
533 env = cms_get0_enveloped(cms);
534 if (!env)
535 goto err;
ab124380 536
0f113f3e
MC		 537 if (nid == NID_undef) {
538 switch (keylen) {
539 case 16:
540 nid = NID_id_aes128_wrap;
541 break;
ab124380 542
0f113f3e
MC		 543 case 24:
544 nid = NID_id_aes192_wrap;
545 break;
546
547 case 32:
548 nid = NID_id_aes256_wrap;
549 break;
550
551 default:
552 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
553 goto err;
554 }
555
556 } else {
557
558 size_t exp_keylen = aes_wrap_keylen(nid);
559
560 if (!exp_keylen) {
561 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
562 CMS_R_UNSUPPORTED_KEK_ALGORITHM);
563 goto err;
564 }
565
566 if (keylen != exp_keylen) {
567 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
568 goto err;
569 }
570
571 }
572
573 /* Initialize recipient info */
574 ri = M_ASN1_new_of(CMS_RecipientInfo);
575 if (!ri)
576 goto merr;
577
578 ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
579 if (!ri->d.kekri)
580 goto merr;
581 ri->type = CMS_RECIPINFO_KEK;
582
583 kekri = ri->d.kekri;
584
585 if (otherTypeId) {
586 kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
587 if (kekri->kekid->other == NULL)
588 goto merr;
589 }
ab124380 590
0f113f3e
MC		 591 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
592 goto merr;
593
594 /* After this point no calls can fail */
595
596 kekri->version = 4;
597
598 kekri->key = key;
599 kekri->keylen = keylen;
600
601 ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
602
603 kekri->kekid->date = date;
604
605 if (kekri->kekid->other) {
606 kekri->kekid->other->keyAttrId = otherTypeId;
607 kekri->kekid->other->keyAttr = otherType;
608 }
609
610 X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
611 OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
612
613 return ri;
614
615 merr:
616 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
617 err:
2ace7450 618 M_ASN1_free_of(ri, CMS_RecipientInfo);
0f113f3e
MC		 619 return NULL;
620
621}
622
623int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri,
624 X509_ALGOR **palg,
625 ASN1_OCTET_STRING **pid,
626 ASN1_GENERALIZEDTIME **pdate,
627 ASN1_OBJECT **potherid,
628 ASN1_TYPE **pothertype)
629{
630 CMS_KEKIdentifier *rkid;
631 if (ri->type != CMS_RECIPINFO_KEK) {
632 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK);
633 return 0;
634 }
635 rkid = ri->d.kekri->kekid;
636 if (palg)
637 *palg = ri->d.kekri->keyEncryptionAlgorithm;
638 if (pid)
639 *pid = rkid->keyIdentifier;
640 if (pdate)
641 *pdate = rkid->date;
642 if (potherid) {
643 if (rkid->other)
644 *potherid = rkid->other->keyAttrId;
645 else
646 *potherid = NULL;
647 }
648 if (pothertype) {
649 if (rkid->other)
650 *pothertype = rkid->other->keyAttr;
651 else
652 *pothertype = NULL;
653 }
654 return 1;
655}
656
657int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
658 unsigned char *key, size_t keylen)
659{
660 CMS_KEKRecipientInfo *kekri;
661 if (ri->type != CMS_RECIPINFO_KEK) {
662 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK);
663 return 0;
664 }
665
666 kekri = ri->d.kekri;
667 kekri->key = key;
668 kekri->keylen = keylen;
669 return 1;
670}
6e3bc4f0
DSH		 671
672/* Encrypt content key in KEK recipient info */
673
674static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms,
0f113f3e
MC		 675 CMS_RecipientInfo *ri)
676{
677 CMS_EncryptedContentInfo *ec;
678 CMS_KEKRecipientInfo *kekri;
679 AES_KEY actx;
680 unsigned char *wkey = NULL;
681 int wkeylen;
682 int r = 0;
6e3bc4f0 683
0f113f3e 684 ec = cms->d.envelopedData->encryptedContentInfo;
6e3bc4f0 685
0f113f3e 686 kekri = ri->d.kekri;
6e3bc4f0 687
0f113f3e
MC		 688 if (!kekri->key) {
689 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
690 return 0;
691 }
6e3bc4f0 692
0f113f3e
MC		 693 if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
694 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
695 CMS_R_ERROR_SETTING_KEY);
696 goto err;
697 }
6e3bc4f0 698
0f113f3e 699 wkey = OPENSSL_malloc(ec->keylen + 8);
6e3bc4f0 700
0f113f3e
MC		 701 if (!wkey) {
702 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
703 goto err;
704 }
6e3bc4f0 705
0f113f3e 706 wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
6e3bc4f0 707
0f113f3e
MC		 708 if (wkeylen <= 0) {
709 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
710 goto err;
711 }
6e3bc4f0 712
0f113f3e 713 ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
6e3bc4f0 714
0f113f3e 715 r = 1;
6e3bc4f0 716
0f113f3e 717 err:
6e3bc4f0 718
0f113f3e
MC		 719 if (!r && wkey)
720 OPENSSL_free(wkey);
721 OPENSSL_cleanse(&actx, sizeof(actx));
6e3bc4f0 722
0f113f3e 723 return r;
6e3bc4f0 724
0f113f3e 725}
6e3bc4f0 726
ab124380
DSH		 727/* Decrypt content key in KEK recipient info */
728
6e3bc4f0 729static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms,
0f113f3e
MC		 730 CMS_RecipientInfo *ri)
731{
732 CMS_EncryptedContentInfo *ec;
733 CMS_KEKRecipientInfo *kekri;
734 AES_KEY actx;
735 unsigned char *ukey = NULL;
736 int ukeylen;
737 int r = 0, wrap_nid;
738
739 ec = cms->d.envelopedData->encryptedContentInfo;
740
741 kekri = ri->d.kekri;
742
743 if (!kekri->key) {
744 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
745 return 0;
746 }
747
748 wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
749 if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
750 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
751 CMS_R_INVALID_KEY_LENGTH);
752 return 0;
753 }
754
755 /* If encrypted key length is invalid don't bother */
756
757 if (kekri->encryptedKey->length < 16) {
758 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
759 CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
760 goto err;
761 }
762
763 if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
764 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
765 CMS_R_ERROR_SETTING_KEY);
766 goto err;
767 }
768
769 ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
770
771 if (!ukey) {
772 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
773 goto err;
774 }
775
776 ukeylen = AES_unwrap_key(&actx, NULL, ukey,
777 kekri->encryptedKey->data,
778 kekri->encryptedKey->length);
779
780 if (ukeylen <= 0) {
781 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
782 goto err;
783 }
784
785 ec->key = ukey;
786 ec->keylen = ukeylen;
787
788 r = 1;
789
790 err:
791
792 if (!r && ukey)
793 OPENSSL_free(ukey);
794 OPENSSL_cleanse(&actx, sizeof(actx));
795
796 return r;
797
798}
6e3bc4f0
DSH		 799
800int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
0f113f3e
MC		 801{
802 switch (ri->type) {
803 case CMS_RECIPINFO_TRANS:
804 return cms_RecipientInfo_ktri_decrypt(cms, ri);
6e3bc4f0 805
0f113f3e
MC		 806 case CMS_RECIPINFO_KEK:
807 return cms_RecipientInfo_kekri_decrypt(cms, ri);
6e3bc4f0 808
0f113f3e
MC		 809 case CMS_RECIPINFO_PASS:
810 return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
d2a53c22 811
0f113f3e
MC		 812 default:
813 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
814 CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE);
815 return 0;
816 }
817}
6e3bc4f0 818
e1f1d28f 819int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
0f113f3e
MC		 820{
821 switch (ri->type) {
822 case CMS_RECIPINFO_TRANS:
823 return cms_RecipientInfo_ktri_encrypt(cms, ri);
824
825 case CMS_RECIPINFO_AGREE:
826 return cms_RecipientInfo_kari_encrypt(cms, ri);
827
828 case CMS_RECIPINFO_KEK:
829 return cms_RecipientInfo_kekri_encrypt(cms, ri);
0f113f3e
MC		 830
831 case CMS_RECIPINFO_PASS:
832 return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
0f113f3e
MC		 833
834 default:
835 CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
836 CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
837 return 0;
838 }
839}
e1f1d28f 840
ff7b6ce9
DSH		 841/* Check structures and fixup version numbers (if necessary) */
842
843static void cms_env_set_originfo_version(CMS_EnvelopedData *env)
0f113f3e
MC		 844{
845 CMS_OriginatorInfo *org = env->originatorInfo;
846 int i;
847 if (org == NULL)
848 return;
849 for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
850 CMS_CertificateChoices *cch;
851 cch = sk_CMS_CertificateChoices_value(org->certificates, i);
852 if (cch->type == CMS_CERTCHOICE_OTHER) {
853 env->version = 4;
854 return;
855 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
856 if (env->version < 3)
857 env->version = 3;
858 }
859 }
860
861 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
862 CMS_RevocationInfoChoice *rch;
863 rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
864 if (rch->type == CMS_REVCHOICE_OTHER) {
865 env->version = 4;
866 return;
867 }
868 }
869}
ff7b6ce9
DSH		 870
871static void cms_env_set_version(CMS_EnvelopedData *env)
0f113f3e
MC		 872{
873 int i;
874 CMS_RecipientInfo *ri;
875
876 /*
877 * Can't set version higher than 4 so if 4 or more already nothing to do.
878 */
879 if (env->version >= 4)
880 return;
881
882 cms_env_set_originfo_version(env);
883
884 if (env->version >= 3)
885 return;
886
887 for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
888 ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
889 if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
890 env->version = 3;
891 return;
892 } else if (ri->type != CMS_RECIPINFO_TRANS
893 || ri->d.ktri->version != 0) {
894 env->version = 2;
895 }
896 }
897 if (env->version == 2)
898 return;
899 if (env->originatorInfo || env->unprotectedAttrs)
900 env->version = 2;
901 env->version = 0;
902}
ff7b6ce9 903
4f1aa191 904BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
0f113f3e
MC		 905{
906 CMS_EncryptedContentInfo *ec;
907 STACK_OF(CMS_RecipientInfo) *rinfos;
908 CMS_RecipientInfo *ri;
909 int i, ok = 0;
910 BIO *ret;
911
912 /* Get BIO first to set up key */
913
914 ec = cms->d.envelopedData->encryptedContentInfo;
915 ret = cms_EncryptedContent_init_bio(ec);
916
917 /* If error or no cipher end of processing */
918
919 if (!ret || !ec->cipher)
920 return ret;
921
922 /* Now encrypt content key according to each RecipientInfo type */
923
924 rinfos = cms->d.envelopedData->recipientInfos;
925
926 for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
927 ri = sk_CMS_RecipientInfo_value(rinfos, i);
928 if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
929 CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
930 CMS_R_ERROR_SETTING_RECIPIENTINFO);
931 goto err;
932 }
933 }
934 cms_env_set_version(cms->d.envelopedData);
935
936 ok = 1;
937
938 err:
939 ec->cipher = NULL;
940 if (ec->key) {
941 OPENSSL_cleanse(ec->key, ec->keylen);
942 OPENSSL_free(ec->key);
943 ec->key = NULL;
944 ec->keylen = 0;
945 }
946 if (ok)
947 return ret;
948 BIO_free(ret);
949 return NULL;
950
951}
952
953/*
954 * Get RecipientInfo type (if any) supported by a key (public or private). To
955 * retain compatibility with previous behaviour if the ctrl value isn't
17c2764d
DSH		 956 * supported we assume key transport.
957 */
958int cms_pkey_get_ri_type(EVP_PKEY *pk)
0f113f3e
MC		 959{
960 if (pk->ameth && pk->ameth->pkey_ctrl) {
961 int i, r;
962 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
963 if (i > 0)
964 return r;
965 }
966 return CMS_RECIPINFO_TRANS;
967}
A mirror of the official openssl repository