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)
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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 "asn1_locl.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);
281 M_ASN1_free_of(ri, CMS_RecipientInfo);
288 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
289 EVP_PKEY **pk, X509 **recip,
292 CMS_KeyTransRecipientInfo *ktri;
293 if (ri->type != CMS_RECIPINFO_TRANS) {
294 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
295 CMS_R_NOT_KEY_TRANSPORT);
304 *recip = ktri->recip;
306 *palg = ktri->keyEncryptionAlgorithm;
310 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
311 ASN1_OCTET_STRING **keyid,
315 CMS_KeyTransRecipientInfo *ktri;
316 if (ri->type != CMS_RECIPINFO_TRANS) {
317 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
318 CMS_R_NOT_KEY_TRANSPORT);
323 return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
326 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
328 if (ri->type != CMS_RECIPINFO_TRANS) {
329 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
330 CMS_R_NOT_KEY_TRANSPORT);
333 return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
336 int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
338 if (ri->type != CMS_RECIPINFO_TRANS) {
339 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
342 ri->d.ktri->pkey = pkey;
346 /* Encrypt content key in key transport recipient info */
348 static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
349 CMS_RecipientInfo *ri)
351 CMS_KeyTransRecipientInfo *ktri;
352 CMS_EncryptedContentInfo *ec;
354 unsigned char *ek = NULL;
359 if (ri->type != CMS_RECIPINFO_TRANS) {
360 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
364 ec = cms->d.envelopedData->encryptedContentInfo;
369 if (!cms_env_asn1_ctrl(ri, 0))
372 pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
376 if (EVP_PKEY_encrypt_init(pctx) <= 0)
380 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
381 EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
382 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
386 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
389 ek = OPENSSL_malloc(eklen);
392 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
396 if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
399 ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
406 EVP_PKEY_CTX_free(pctx);
415 /* Decrypt content key from KTRI */
417 static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
418 CMS_RecipientInfo *ri)
420 CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
421 EVP_PKEY *pkey = ktri->pkey;
422 unsigned char *ek = NULL;
425 CMS_EncryptedContentInfo *ec;
426 ec = cms->d.envelopedData->encryptedContentInfo;
428 if (ktri->pkey == NULL) {
429 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
433 ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
437 if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
440 if (!cms_env_asn1_ctrl(ri, 1))
443 if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
444 EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
445 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
449 if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
450 ktri->encryptedKey->data,
451 ktri->encryptedKey->length) <= 0)
454 ek = OPENSSL_malloc(eklen);
457 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
461 if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
462 ktri->encryptedKey->data,
463 ktri->encryptedKey->length) <= 0) {
464 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
471 OPENSSL_cleanse(ec->key, ec->keylen);
472 OPENSSL_free(ec->key);
480 EVP_PKEY_CTX_free(ktri->pctx);
489 /* Key Encrypted Key (KEK) RecipientInfo routines */
491 int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
492 const unsigned char *id, size_t idlen)
494 ASN1_OCTET_STRING tmp_os;
495 CMS_KEKRecipientInfo *kekri;
496 if (ri->type != CMS_RECIPINFO_KEK) {
497 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
501 tmp_os.type = V_ASN1_OCTET_STRING;
503 tmp_os.data = (unsigned char *)id;
504 tmp_os.length = (int)idlen;
505 return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
508 /* For now hard code AES key wrap info */
510 static size_t aes_wrap_keylen(int nid)
513 case NID_id_aes128_wrap:
516 case NID_id_aes192_wrap:
519 case NID_id_aes256_wrap:
527 CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
528 unsigned char *key, size_t keylen,
529 unsigned char *id, size_t idlen,
530 ASN1_GENERALIZEDTIME *date,
531 ASN1_OBJECT *otherTypeId,
532 ASN1_TYPE *otherType)
534 CMS_RecipientInfo *ri = NULL;
535 CMS_EnvelopedData *env;
536 CMS_KEKRecipientInfo *kekri;
537 env = cms_get0_enveloped(cms);
541 if (nid == NID_undef) {
544 nid = NID_id_aes128_wrap;
548 nid = NID_id_aes192_wrap;
552 nid = NID_id_aes256_wrap;
556 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
562 size_t exp_keylen = aes_wrap_keylen(nid);
565 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
566 CMS_R_UNSUPPORTED_KEK_ALGORITHM);
570 if (keylen != exp_keylen) {
571 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
577 /* Initialize recipient info */
578 ri = M_ASN1_new_of(CMS_RecipientInfo);
582 ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
585 ri->type = CMS_RECIPINFO_KEK;
590 kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
591 if (kekri->kekid->other == NULL)
595 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
598 /* After this point no calls can fail */
603 kekri->keylen = keylen;
605 ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
607 kekri->kekid->date = date;
609 if (kekri->kekid->other) {
610 kekri->kekid->other->keyAttrId = otherTypeId;
611 kekri->kekid->other->keyAttr = otherType;
614 X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
615 OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
620 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
623 M_ASN1_free_of(ri, CMS_RecipientInfo);
628 int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri,
630 ASN1_OCTET_STRING **pid,
631 ASN1_GENERALIZEDTIME **pdate,
632 ASN1_OBJECT **potherid,
633 ASN1_TYPE **pothertype)
635 CMS_KEKIdentifier *rkid;
636 if (ri->type != CMS_RECIPINFO_KEK) {
637 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK);
640 rkid = ri->d.kekri->kekid;
642 *palg = ri->d.kekri->keyEncryptionAlgorithm;
644 *pid = rkid->keyIdentifier;
649 *potherid = rkid->other->keyAttrId;
655 *pothertype = rkid->other->keyAttr;
662 int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
663 unsigned char *key, size_t keylen)
665 CMS_KEKRecipientInfo *kekri;
666 if (ri->type != CMS_RECIPINFO_KEK) {
667 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK);
673 kekri->keylen = keylen;
677 /* Encrypt content key in KEK recipient info */
679 static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms,
680 CMS_RecipientInfo *ri)
682 CMS_EncryptedContentInfo *ec;
683 CMS_KEKRecipientInfo *kekri;
685 unsigned char *wkey = NULL;
689 ec = cms->d.envelopedData->encryptedContentInfo;
694 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
698 if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
699 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
700 CMS_R_ERROR_SETTING_KEY);
704 wkey = OPENSSL_malloc(ec->keylen + 8);
707 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
711 wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
714 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
718 ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
726 OPENSSL_cleanse(&actx, sizeof(actx));
732 /* Decrypt content key in KEK recipient info */
734 static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms,
735 CMS_RecipientInfo *ri)
737 CMS_EncryptedContentInfo *ec;
738 CMS_KEKRecipientInfo *kekri;
740 unsigned char *ukey = NULL;
744 ec = cms->d.envelopedData->encryptedContentInfo;
749 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
753 wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
754 if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
755 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
756 CMS_R_INVALID_KEY_LENGTH);
760 /* If encrypted key length is invalid don't bother */
762 if (kekri->encryptedKey->length < 16) {
763 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
764 CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
768 if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
769 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
770 CMS_R_ERROR_SETTING_KEY);
774 ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
777 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
781 ukeylen = AES_unwrap_key(&actx, NULL, ukey,
782 kekri->encryptedKey->data,
783 kekri->encryptedKey->length);
786 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
791 ec->keylen = ukeylen;
799 OPENSSL_cleanse(&actx, sizeof(actx));
805 int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
808 case CMS_RECIPINFO_TRANS:
809 return cms_RecipientInfo_ktri_decrypt(cms, ri);
811 case CMS_RECIPINFO_KEK:
812 return cms_RecipientInfo_kekri_decrypt(cms, ri);
814 case CMS_RECIPINFO_PASS:
815 return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
818 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
819 CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE);
824 int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
827 case CMS_RECIPINFO_TRANS:
828 return cms_RecipientInfo_ktri_encrypt(cms, ri);
830 case CMS_RECIPINFO_AGREE:
831 return cms_RecipientInfo_kari_encrypt(cms, ri);
833 case CMS_RECIPINFO_KEK:
834 return cms_RecipientInfo_kekri_encrypt(cms, ri);
837 case CMS_RECIPINFO_PASS:
838 return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
842 CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
843 CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
848 /* Check structures and fixup version numbers (if necessary) */
850 static void cms_env_set_originfo_version(CMS_EnvelopedData *env)
852 CMS_OriginatorInfo *org = env->originatorInfo;
856 for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
857 CMS_CertificateChoices *cch;
858 cch = sk_CMS_CertificateChoices_value(org->certificates, i);
859 if (cch->type == CMS_CERTCHOICE_OTHER) {
862 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
863 if (env->version < 3)
868 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
869 CMS_RevocationInfoChoice *rch;
870 rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
871 if (rch->type == CMS_REVCHOICE_OTHER) {
878 static void cms_env_set_version(CMS_EnvelopedData *env)
881 CMS_RecipientInfo *ri;
884 * Can't set version higher than 4 so if 4 or more already nothing to do.
886 if (env->version >= 4)
889 cms_env_set_originfo_version(env);
891 if (env->version >= 3)
894 for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
895 ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
896 if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
899 } else if (ri->type != CMS_RECIPINFO_TRANS
900 || ri->d.ktri->version != 0) {
904 if (env->version == 2)
906 if (env->originatorInfo || env->unprotectedAttrs)
911 BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
913 CMS_EncryptedContentInfo *ec;
914 STACK_OF(CMS_RecipientInfo) *rinfos;
915 CMS_RecipientInfo *ri;
919 /* Get BIO first to set up key */
921 ec = cms->d.envelopedData->encryptedContentInfo;
922 ret = cms_EncryptedContent_init_bio(ec);
924 /* If error or no cipher end of processing */
926 if (!ret || !ec->cipher)
929 /* Now encrypt content key according to each RecipientInfo type */
931 rinfos = cms->d.envelopedData->recipientInfos;
933 for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
934 ri = sk_CMS_RecipientInfo_value(rinfos, i);
935 if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
936 CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
937 CMS_R_ERROR_SETTING_RECIPIENTINFO);
941 cms_env_set_version(cms->d.envelopedData);
948 OPENSSL_cleanse(ec->key, ec->keylen);
949 OPENSSL_free(ec->key);
961 * Get RecipientInfo type (if any) supported by a key (public or private). To
962 * retain compatibility with previous behaviour if the ctrl value isn't
963 * supported we assume key transport.
965 int cms_pkey_get_ri_type(EVP_PKEY *pk)
967 if (pk->ameth && pk->ameth->pkey_ctrl) {
969 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
973 return CMS_RECIPINFO_TRANS;