1 /* crypto/cms/cms_env.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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>
61 #include <openssl/rand.h>
62 #include <openssl/aes.h>
64 #include "internal/asn1_int.h"
66 /* CMS EnvelopedData Utilities */
68 DECLARE_ASN1_ITEM(CMS_EnvelopedData
)
69 DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo
)
70 DECLARE_ASN1_ITEM(CMS_KEKRecipientInfo
)
71 DECLARE_ASN1_ITEM(CMS_OtherKeyAttribute
)
73 DECLARE_STACK_OF(CMS_RecipientInfo
)
75 CMS_EnvelopedData
*cms_get0_enveloped(CMS_ContentInfo
*cms
)
77 if (OBJ_obj2nid(cms
->contentType
) != NID_pkcs7_enveloped
) {
78 CMSerr(CMS_F_CMS_GET0_ENVELOPED
,
79 CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA
);
82 return cms
->d
.envelopedData
;
85 static CMS_EnvelopedData
*cms_enveloped_data_init(CMS_ContentInfo
*cms
)
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
);
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
;
100 return cms_get0_enveloped(cms
);
103 int cms_env_asn1_ctrl(CMS_RecipientInfo
*ri
, int cmd
)
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
;
113 pkey
= EVP_PKEY_CTX_get0_pkey(pctx
);
118 if (!pkey
->ameth
|| !pkey
->ameth
->pkey_ctrl
)
120 i
= pkey
->ameth
->pkey_ctrl(pkey
, ASN1_PKEY_CTRL_CMS_ENVELOPE
, cmd
, ri
);
122 CMSerr(CMS_F_CMS_ENV_ASN1_CTRL
,
123 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE
);
127 CMSerr(CMS_F_CMS_ENV_ASN1_CTRL
, CMS_R_CTRL_FAILURE
);
133 STACK_OF(CMS_RecipientInfo
) *CMS_get0_RecipientInfos(CMS_ContentInfo
*cms
)
135 CMS_EnvelopedData
*env
;
136 env
= cms_get0_enveloped(cms
);
139 return env
->recipientInfos
;
142 int CMS_RecipientInfo_type(CMS_RecipientInfo
*ri
)
147 EVP_PKEY_CTX
*CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo
*ri
)
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
;
156 CMS_ContentInfo
*CMS_EnvelopedData_create(const EVP_CIPHER
*cipher
)
158 CMS_ContentInfo
*cms
;
159 CMS_EnvelopedData
*env
;
160 cms
= CMS_ContentInfo_new();
163 env
= cms_enveloped_data_init(cms
);
166 if (!cms_EncryptedContent_init(env
->encryptedContentInfo
,
172 CMS_ContentInfo_free(cms
);
173 CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE
, ERR_R_MALLOC_FAILURE
);
177 /* Key Transport Recipient Info (KTRI) routines */
179 /* Initialise a ktri based on passed certificate and key */
181 static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo
*ri
, X509
*recip
,
182 EVP_PKEY
*pk
, unsigned int flags
)
184 CMS_KeyTransRecipientInfo
*ktri
;
187 ri
->d
.ktri
= M_ASN1_new_of(CMS_KeyTransRecipientInfo
);
190 ri
->type
= CMS_RECIPINFO_TRANS
;
194 if (flags
& CMS_USE_KEYID
) {
196 idtype
= CMS_RECIPINFO_KEYIDENTIFIER
;
199 idtype
= CMS_RECIPINFO_ISSUER_SERIAL
;
203 * Not a typo: RecipientIdentifier and SignerIdentifier are the same
207 if (!cms_set1_SignerIdentifier(ktri
->rid
, recip
, idtype
))
210 CRYPTO_add(&recip
->references
, 1, CRYPTO_LOCK_X509
);
211 CRYPTO_add(&pk
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
215 if (flags
& CMS_KEY_PARAM
) {
216 ktri
->pctx
= EVP_PKEY_CTX_new(ktri
->pkey
, NULL
);
219 if (EVP_PKEY_encrypt_init(ktri
->pctx
) <= 0)
221 } else if (!cms_env_asn1_ctrl(ri
, 0))
227 * Add a recipient certificate using appropriate type of RecipientInfo
230 CMS_RecipientInfo
*CMS_add1_recipient_cert(CMS_ContentInfo
*cms
,
231 X509
*recip
, unsigned int flags
)
233 CMS_RecipientInfo
*ri
= NULL
;
234 CMS_EnvelopedData
*env
;
236 env
= cms_get0_enveloped(cms
);
240 /* Initialize recipient info */
241 ri
= M_ASN1_new_of(CMS_RecipientInfo
);
245 pk
= X509_get_pubkey(recip
);
247 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT
, CMS_R_ERROR_GETTING_PUBLIC_KEY
);
251 switch (cms_pkey_get_ri_type(pk
)) {
253 case CMS_RECIPINFO_TRANS
:
254 if (!cms_RecipientInfo_ktri_init(ri
, recip
, pk
, flags
))
258 case CMS_RECIPINFO_AGREE
:
259 if (!cms_RecipientInfo_kari_init(ri
, recip
, pk
, flags
))
264 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT
,
265 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE
);
270 if (!sk_CMS_RecipientInfo_push(env
->recipientInfos
, ri
))
278 CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT
, ERR_R_MALLOC_FAILURE
);
280 M_ASN1_free_of(ri
, CMS_RecipientInfo
);
286 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo
*ri
,
287 EVP_PKEY
**pk
, X509
**recip
,
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
);
302 *recip
= ktri
->recip
;
304 *palg
= ktri
->keyEncryptionAlgorithm
;
308 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo
*ri
,
309 ASN1_OCTET_STRING
**keyid
,
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
);
321 return cms_SignerIdentifier_get0_signer_id(ktri
->rid
, keyid
, issuer
, sno
);
324 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo
*ri
, X509
*cert
)
326 if (ri
->type
!= CMS_RECIPINFO_TRANS
) {
327 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP
,
328 CMS_R_NOT_KEY_TRANSPORT
);
331 return cms_SignerIdentifier_cert_cmp(ri
->d
.ktri
->rid
, cert
);
334 int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo
*ri
, EVP_PKEY
*pkey
)
336 if (ri
->type
!= CMS_RECIPINFO_TRANS
) {
337 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY
, CMS_R_NOT_KEY_TRANSPORT
);
340 ri
->d
.ktri
->pkey
= pkey
;
344 /* Encrypt content key in key transport recipient info */
346 static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo
*cms
,
347 CMS_RecipientInfo
*ri
)
349 CMS_KeyTransRecipientInfo
*ktri
;
350 CMS_EncryptedContentInfo
*ec
;
352 unsigned char *ek
= NULL
;
357 if (ri
->type
!= CMS_RECIPINFO_TRANS
) {
358 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT
, CMS_R_NOT_KEY_TRANSPORT
);
362 ec
= cms
->d
.envelopedData
->encryptedContentInfo
;
367 if (!cms_env_asn1_ctrl(ri
, 0))
370 pctx
= EVP_PKEY_CTX_new(ktri
->pkey
, NULL
);
374 if (EVP_PKEY_encrypt_init(pctx
) <= 0)
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
);
384 if (EVP_PKEY_encrypt(pctx
, NULL
, &eklen
, ec
->key
, ec
->keylen
) <= 0)
387 ek
= OPENSSL_malloc(eklen
);
390 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT
, ERR_R_MALLOC_FAILURE
);
394 if (EVP_PKEY_encrypt(pctx
, ek
, &eklen
, ec
->key
, ec
->keylen
) <= 0)
397 ASN1_STRING_set0(ktri
->encryptedKey
, ek
, eklen
);
404 EVP_PKEY_CTX_free(pctx
);
413 /* Decrypt content key from KTRI */
415 static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo
*cms
,
416 CMS_RecipientInfo
*ri
)
418 CMS_KeyTransRecipientInfo
*ktri
= ri
->d
.ktri
;
419 EVP_PKEY
*pkey
= ktri
->pkey
;
420 unsigned char *ek
= NULL
;
423 CMS_EncryptedContentInfo
*ec
;
424 ec
= cms
->d
.envelopedData
->encryptedContentInfo
;
426 if (ktri
->pkey
== NULL
) {
427 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT
, CMS_R_NO_PRIVATE_KEY
);
431 ktri
->pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
435 if (EVP_PKEY_decrypt_init(ktri
->pctx
) <= 0)
438 if (!cms_env_asn1_ctrl(ri
, 1))
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
);
447 if (EVP_PKEY_decrypt(ktri
->pctx
, NULL
, &eklen
,
448 ktri
->encryptedKey
->data
,
449 ktri
->encryptedKey
->length
) <= 0)
452 ek
= OPENSSL_malloc(eklen
);
455 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT
, ERR_R_MALLOC_FAILURE
);
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
);
469 OPENSSL_cleanse(ec
->key
, ec
->keylen
);
470 OPENSSL_free(ec
->key
);
477 EVP_PKEY_CTX_free(ktri
->pctx
);
485 /* Key Encrypted Key (KEK) RecipientInfo routines */
487 int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo
*ri
,
488 const unsigned char *id
, size_t idlen
)
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
);
497 tmp_os
.type
= V_ASN1_OCTET_STRING
;
499 tmp_os
.data
= (unsigned char *)id
;
500 tmp_os
.length
= (int)idlen
;
501 return ASN1_OCTET_STRING_cmp(&tmp_os
, kekri
->kekid
->keyIdentifier
);
504 /* For now hard code AES key wrap info */
506 static size_t aes_wrap_keylen(int nid
)
509 case NID_id_aes128_wrap
:
512 case NID_id_aes192_wrap
:
515 case NID_id_aes256_wrap
:
523 CMS_RecipientInfo
*CMS_add0_recipient_key(CMS_ContentInfo
*cms
, int nid
,
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
)
530 CMS_RecipientInfo
*ri
= NULL
;
531 CMS_EnvelopedData
*env
;
532 CMS_KEKRecipientInfo
*kekri
;
533 env
= cms_get0_enveloped(cms
);
537 if (nid
== NID_undef
) {
540 nid
= NID_id_aes128_wrap
;
544 nid
= NID_id_aes192_wrap
;
548 nid
= NID_id_aes256_wrap
;
552 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY
, CMS_R_INVALID_KEY_LENGTH
);
558 size_t exp_keylen
= aes_wrap_keylen(nid
);
561 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY
,
562 CMS_R_UNSUPPORTED_KEK_ALGORITHM
);
566 if (keylen
!= exp_keylen
) {
567 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY
, CMS_R_INVALID_KEY_LENGTH
);
573 /* Initialize recipient info */
574 ri
= M_ASN1_new_of(CMS_RecipientInfo
);
578 ri
->d
.kekri
= M_ASN1_new_of(CMS_KEKRecipientInfo
);
581 ri
->type
= CMS_RECIPINFO_KEK
;
586 kekri
->kekid
->other
= M_ASN1_new_of(CMS_OtherKeyAttribute
);
587 if (kekri
->kekid
->other
== NULL
)
591 if (!sk_CMS_RecipientInfo_push(env
->recipientInfos
, ri
))
594 /* After this point no calls can fail */
599 kekri
->keylen
= keylen
;
601 ASN1_STRING_set0(kekri
->kekid
->keyIdentifier
, id
, idlen
);
603 kekri
->kekid
->date
= date
;
605 if (kekri
->kekid
->other
) {
606 kekri
->kekid
->other
->keyAttrId
= otherTypeId
;
607 kekri
->kekid
->other
->keyAttr
= otherType
;
610 X509_ALGOR_set0(kekri
->keyEncryptionAlgorithm
,
611 OBJ_nid2obj(nid
), V_ASN1_UNDEF
, NULL
);
616 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY
, ERR_R_MALLOC_FAILURE
);
618 M_ASN1_free_of(ri
, CMS_RecipientInfo
);
623 int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo
*ri
,
625 ASN1_OCTET_STRING
**pid
,
626 ASN1_GENERALIZEDTIME
**pdate
,
627 ASN1_OBJECT
**potherid
,
628 ASN1_TYPE
**pothertype
)
630 CMS_KEKIdentifier
*rkid
;
631 if (ri
->type
!= CMS_RECIPINFO_KEK
) {
632 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID
, CMS_R_NOT_KEK
);
635 rkid
= ri
->d
.kekri
->kekid
;
637 *palg
= ri
->d
.kekri
->keyEncryptionAlgorithm
;
639 *pid
= rkid
->keyIdentifier
;
644 *potherid
= rkid
->other
->keyAttrId
;
650 *pothertype
= rkid
->other
->keyAttr
;
657 int CMS_RecipientInfo_set0_key(CMS_RecipientInfo
*ri
,
658 unsigned char *key
, size_t keylen
)
660 CMS_KEKRecipientInfo
*kekri
;
661 if (ri
->type
!= CMS_RECIPINFO_KEK
) {
662 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY
, CMS_R_NOT_KEK
);
668 kekri
->keylen
= keylen
;
672 /* Encrypt content key in KEK recipient info */
674 static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo
*cms
,
675 CMS_RecipientInfo
*ri
)
677 CMS_EncryptedContentInfo
*ec
;
678 CMS_KEKRecipientInfo
*kekri
;
680 unsigned char *wkey
= NULL
;
684 ec
= cms
->d
.envelopedData
->encryptedContentInfo
;
689 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT
, CMS_R_NO_KEY
);
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
);
699 wkey
= OPENSSL_malloc(ec
->keylen
+ 8);
702 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT
, ERR_R_MALLOC_FAILURE
);
706 wkeylen
= AES_wrap_key(&actx
, NULL
, wkey
, ec
->key
, ec
->keylen
);
709 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT
, CMS_R_WRAP_ERROR
);
713 ASN1_STRING_set0(kekri
->encryptedKey
, wkey
, wkeylen
);
721 OPENSSL_cleanse(&actx
, sizeof(actx
));
727 /* Decrypt content key in KEK recipient info */
729 static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo
*cms
,
730 CMS_RecipientInfo
*ri
)
732 CMS_EncryptedContentInfo
*ec
;
733 CMS_KEKRecipientInfo
*kekri
;
735 unsigned char *ukey
= NULL
;
739 ec
= cms
->d
.envelopedData
->encryptedContentInfo
;
744 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT
, CMS_R_NO_KEY
);
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
);
755 /* If encrypted key length is invalid don't bother */
757 if (kekri
->encryptedKey
->length
< 16) {
758 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT
,
759 CMS_R_INVALID_ENCRYPTED_KEY_LENGTH
);
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
);
769 ukey
= OPENSSL_malloc(kekri
->encryptedKey
->length
- 8);
772 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT
, ERR_R_MALLOC_FAILURE
);
776 ukeylen
= AES_unwrap_key(&actx
, NULL
, ukey
,
777 kekri
->encryptedKey
->data
,
778 kekri
->encryptedKey
->length
);
781 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT
, CMS_R_UNWRAP_ERROR
);
786 ec
->keylen
= ukeylen
;
794 OPENSSL_cleanse(&actx
, sizeof(actx
));
800 int CMS_RecipientInfo_decrypt(CMS_ContentInfo
*cms
, CMS_RecipientInfo
*ri
)
803 case CMS_RECIPINFO_TRANS
:
804 return cms_RecipientInfo_ktri_decrypt(cms
, ri
);
806 case CMS_RECIPINFO_KEK
:
807 return cms_RecipientInfo_kekri_decrypt(cms
, ri
);
809 case CMS_RECIPINFO_PASS
:
810 return cms_RecipientInfo_pwri_crypt(cms
, ri
, 0);
813 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT
,
814 CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE
);
819 int CMS_RecipientInfo_encrypt(CMS_ContentInfo
*cms
, CMS_RecipientInfo
*ri
)
822 case CMS_RECIPINFO_TRANS
:
823 return cms_RecipientInfo_ktri_encrypt(cms
, ri
);
825 case CMS_RECIPINFO_AGREE
:
826 return cms_RecipientInfo_kari_encrypt(cms
, ri
);
828 case CMS_RECIPINFO_KEK
:
829 return cms_RecipientInfo_kekri_encrypt(cms
, ri
);
831 case CMS_RECIPINFO_PASS
:
832 return cms_RecipientInfo_pwri_crypt(cms
, ri
, 1);
835 CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT
,
836 CMS_R_UNSUPPORTED_RECIPIENT_TYPE
);
841 /* Check structures and fixup version numbers (if necessary) */
843 static void cms_env_set_originfo_version(CMS_EnvelopedData
*env
)
845 CMS_OriginatorInfo
*org
= env
->originatorInfo
;
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
) {
855 } else if (cch
->type
== CMS_CERTCHOICE_V2ACERT
) {
856 if (env
->version
< 3)
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
) {
871 static void cms_env_set_version(CMS_EnvelopedData
*env
)
874 CMS_RecipientInfo
*ri
;
877 * Can't set version higher than 4 so if 4 or more already nothing to do.
879 if (env
->version
>= 4)
882 cms_env_set_originfo_version(env
);
884 if (env
->version
>= 3)
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
) {
892 } else if (ri
->type
!= CMS_RECIPINFO_TRANS
893 || ri
->d
.ktri
->version
!= 0) {
897 if (env
->version
== 2)
899 if (env
->originatorInfo
|| env
->unprotectedAttrs
)
904 BIO
*cms_EnvelopedData_init_bio(CMS_ContentInfo
*cms
)
906 CMS_EncryptedContentInfo
*ec
;
907 STACK_OF(CMS_RecipientInfo
) *rinfos
;
908 CMS_RecipientInfo
*ri
;
912 /* Get BIO first to set up key */
914 ec
= cms
->d
.envelopedData
->encryptedContentInfo
;
915 ret
= cms_EncryptedContent_init_bio(ec
);
917 /* If error or no cipher end of processing */
919 if (!ret
|| !ec
->cipher
)
922 /* Now encrypt content key according to each RecipientInfo type */
924 rinfos
= cms
->d
.envelopedData
->recipientInfos
;
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
);
934 cms_env_set_version(cms
->d
.envelopedData
);
941 OPENSSL_cleanse(ec
->key
, ec
->keylen
);
942 OPENSSL_free(ec
->key
);
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
956 * supported we assume key transport.
958 int cms_pkey_get_ri_type(EVP_PKEY
*pk
)
960 if (pk
->ameth
&& pk
->ameth
->pkey_ctrl
) {
962 i
= pk
->ameth
->pkey_ctrl(pk
, ASN1_PKEY_CTRL_CMS_RI_TYPE
, 0, &r
);
966 return CMS_RECIPINFO_TRANS
;