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 "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);
281 M_ASN1_free_of(ri, CMS_RecipientInfo);
287 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
288 EVP_PKEY **pk, X509 **recip,
291 CMS_KeyTransRecipientInfo *ktri;
292 if (ri->type != CMS_RECIPINFO_TRANS) {
293 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
294 CMS_R_NOT_KEY_TRANSPORT);
303 *recip = ktri->recip;
305 *palg = ktri->keyEncryptionAlgorithm;
309 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
310 ASN1_OCTET_STRING **keyid,
314 CMS_KeyTransRecipientInfo *ktri;
315 if (ri->type != CMS_RECIPINFO_TRANS) {
316 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
317 CMS_R_NOT_KEY_TRANSPORT);
322 return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
325 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
327 if (ri->type != CMS_RECIPINFO_TRANS) {
328 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
329 CMS_R_NOT_KEY_TRANSPORT);
332 return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
335 int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
337 if (ri->type != CMS_RECIPINFO_TRANS) {
338 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
341 ri->d.ktri->pkey = pkey;
345 /* Encrypt content key in key transport recipient info */
347 static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
348 CMS_RecipientInfo *ri)
350 CMS_KeyTransRecipientInfo *ktri;
351 CMS_EncryptedContentInfo *ec;
353 unsigned char *ek = NULL;
358 if (ri->type != CMS_RECIPINFO_TRANS) {
359 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
363 ec = cms->d.envelopedData->encryptedContentInfo;
368 if (!cms_env_asn1_ctrl(ri, 0))
371 pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
375 if (EVP_PKEY_encrypt_init(pctx) <= 0)
379 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
380 EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
381 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
385 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
388 ek = OPENSSL_malloc(eklen);
391 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
395 if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
398 ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
405 EVP_PKEY_CTX_free(pctx);
414 /* Decrypt content key from KTRI */
416 static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
417 CMS_RecipientInfo *ri)
419 CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
420 EVP_PKEY *pkey = ktri->pkey;
421 unsigned char *ek = NULL;
424 CMS_EncryptedContentInfo *ec;
425 ec = cms->d.envelopedData->encryptedContentInfo;
427 if (ktri->pkey == NULL) {
428 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
432 ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
436 if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
439 if (!cms_env_asn1_ctrl(ri, 1))
442 if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
443 EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
444 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
448 if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
449 ktri->encryptedKey->data,
450 ktri->encryptedKey->length) <= 0)
453 ek = OPENSSL_malloc(eklen);
456 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
460 if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
461 ktri->encryptedKey->data,
462 ktri->encryptedKey->length) <= 0) {
463 CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
470 OPENSSL_cleanse(ec->key, ec->keylen);
471 OPENSSL_free(ec->key);
478 EVP_PKEY_CTX_free(ktri->pctx);
486 /* Key Encrypted Key (KEK) RecipientInfo routines */
488 int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
489 const unsigned char *id, size_t idlen)
491 ASN1_OCTET_STRING tmp_os;
492 CMS_KEKRecipientInfo *kekri;
493 if (ri->type != CMS_RECIPINFO_KEK) {
494 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
498 tmp_os.type = V_ASN1_OCTET_STRING;
500 tmp_os.data = (unsigned char *)id;
501 tmp_os.length = (int)idlen;
502 return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
505 /* For now hard code AES key wrap info */
507 static size_t aes_wrap_keylen(int nid)
510 case NID_id_aes128_wrap:
513 case NID_id_aes192_wrap:
516 case NID_id_aes256_wrap:
524 CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
525 unsigned char *key, size_t keylen,
526 unsigned char *id, size_t idlen,
527 ASN1_GENERALIZEDTIME *date,
528 ASN1_OBJECT *otherTypeId,
529 ASN1_TYPE *otherType)
531 CMS_RecipientInfo *ri = NULL;
532 CMS_EnvelopedData *env;
533 CMS_KEKRecipientInfo *kekri;
534 env = cms_get0_enveloped(cms);
538 if (nid == NID_undef) {
541 nid = NID_id_aes128_wrap;
545 nid = NID_id_aes192_wrap;
549 nid = NID_id_aes256_wrap;
553 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
559 size_t exp_keylen = aes_wrap_keylen(nid);
562 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
563 CMS_R_UNSUPPORTED_KEK_ALGORITHM);
567 if (keylen != exp_keylen) {
568 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
574 /* Initialize recipient info */
575 ri = M_ASN1_new_of(CMS_RecipientInfo);
579 ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
582 ri->type = CMS_RECIPINFO_KEK;
587 kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
588 if (kekri->kekid->other == NULL)
592 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
595 /* After this point no calls can fail */
600 kekri->keylen = keylen;
602 ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
604 kekri->kekid->date = date;
606 if (kekri->kekid->other) {
607 kekri->kekid->other->keyAttrId = otherTypeId;
608 kekri->kekid->other->keyAttr = otherType;
611 X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
612 OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
617 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
620 M_ASN1_free_of(ri, CMS_RecipientInfo);
625 int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri,
627 ASN1_OCTET_STRING **pid,
628 ASN1_GENERALIZEDTIME **pdate,
629 ASN1_OBJECT **potherid,
630 ASN1_TYPE **pothertype)
632 CMS_KEKIdentifier *rkid;
633 if (ri->type != CMS_RECIPINFO_KEK) {
634 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK);
637 rkid = ri->d.kekri->kekid;
639 *palg = ri->d.kekri->keyEncryptionAlgorithm;
641 *pid = rkid->keyIdentifier;
646 *potherid = rkid->other->keyAttrId;
652 *pothertype = rkid->other->keyAttr;
659 int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
660 unsigned char *key, size_t keylen)
662 CMS_KEKRecipientInfo *kekri;
663 if (ri->type != CMS_RECIPINFO_KEK) {
664 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK);
670 kekri->keylen = keylen;
674 /* Encrypt content key in KEK recipient info */
676 static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms,
677 CMS_RecipientInfo *ri)
679 CMS_EncryptedContentInfo *ec;
680 CMS_KEKRecipientInfo *kekri;
682 unsigned char *wkey = NULL;
686 ec = cms->d.envelopedData->encryptedContentInfo;
691 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
695 if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
696 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
697 CMS_R_ERROR_SETTING_KEY);
701 wkey = OPENSSL_malloc(ec->keylen + 8);
704 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
708 wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
711 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
715 ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
723 OPENSSL_cleanse(&actx, sizeof(actx));
729 /* Decrypt content key in KEK recipient info */
731 static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms,
732 CMS_RecipientInfo *ri)
734 CMS_EncryptedContentInfo *ec;
735 CMS_KEKRecipientInfo *kekri;
737 unsigned char *ukey = NULL;
741 ec = cms->d.envelopedData->encryptedContentInfo;
746 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
750 wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
751 if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
752 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
753 CMS_R_INVALID_KEY_LENGTH);
757 /* If encrypted key length is invalid don't bother */
759 if (kekri->encryptedKey->length < 16) {
760 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
761 CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
765 if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
766 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
767 CMS_R_ERROR_SETTING_KEY);
771 ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
774 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
778 ukeylen = AES_unwrap_key(&actx, NULL, ukey,
779 kekri->encryptedKey->data,
780 kekri->encryptedKey->length);
783 CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
788 ec->keylen = ukeylen;
796 OPENSSL_cleanse(&actx, sizeof(actx));
802 int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
805 case CMS_RECIPINFO_TRANS:
806 return cms_RecipientInfo_ktri_decrypt(cms, ri);
808 case CMS_RECIPINFO_KEK:
809 return cms_RecipientInfo_kekri_decrypt(cms, ri);
811 case CMS_RECIPINFO_PASS:
812 return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
815 CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
816 CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE);
821 int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
824 case CMS_RECIPINFO_TRANS:
825 return cms_RecipientInfo_ktri_encrypt(cms, ri);
827 case CMS_RECIPINFO_AGREE:
828 return cms_RecipientInfo_kari_encrypt(cms, ri);
830 case CMS_RECIPINFO_KEK:
831 return cms_RecipientInfo_kekri_encrypt(cms, ri);
833 case CMS_RECIPINFO_PASS:
834 return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
837 CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
838 CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
843 /* Check structures and fixup version numbers (if necessary) */
845 static void cms_env_set_originfo_version(CMS_EnvelopedData *env)
847 CMS_OriginatorInfo *org = env->originatorInfo;
851 for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
852 CMS_CertificateChoices *cch;
853 cch = sk_CMS_CertificateChoices_value(org->certificates, i);
854 if (cch->type == CMS_CERTCHOICE_OTHER) {
857 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
858 if (env->version < 3)
863 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
864 CMS_RevocationInfoChoice *rch;
865 rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
866 if (rch->type == CMS_REVCHOICE_OTHER) {
873 static void cms_env_set_version(CMS_EnvelopedData *env)
876 CMS_RecipientInfo *ri;
879 * Can't set version higher than 4 so if 4 or more already nothing to do.
881 if (env->version >= 4)
884 cms_env_set_originfo_version(env);
886 if (env->version >= 3)
889 for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
890 ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
891 if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
894 } else if (ri->type != CMS_RECIPINFO_TRANS
895 || ri->d.ktri->version != 0) {
899 if (env->version == 2)
901 if (env->originatorInfo || env->unprotectedAttrs)
906 BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
908 CMS_EncryptedContentInfo *ec;
909 STACK_OF(CMS_RecipientInfo) *rinfos;
910 CMS_RecipientInfo *ri;
914 /* Get BIO first to set up key */
916 ec = cms->d.envelopedData->encryptedContentInfo;
917 ret = cms_EncryptedContent_init_bio(ec);
919 /* If error or no cipher end of processing */
921 if (!ret || !ec->cipher)
924 /* Now encrypt content key according to each RecipientInfo type */
926 rinfos = cms->d.envelopedData->recipientInfos;
928 for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
929 ri = sk_CMS_RecipientInfo_value(rinfos, i);
930 if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
931 CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
932 CMS_R_ERROR_SETTING_RECIPIENTINFO);
936 cms_env_set_version(cms->d.envelopedData);
943 OPENSSL_cleanse(ec->key, ec->keylen);
944 OPENSSL_free(ec->key);
956 * Get RecipientInfo type (if any) supported by a key (public or private). To
957 * retain compatibility with previous behaviour if the ctrl value isn't
958 * supported we assume key transport.
960 int cms_pkey_get_ri_type(EVP_PKEY *pk)
962 if (pk->ameth && pk->ameth->pkey_ctrl) {
964 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
968 return CMS_RECIPINFO_TRANS;