early-access version 1255
This commit is contained in:
pineappleEA
978
externals/libressl/crypto/cms/cms_env.c
vendored
Executable file
978
externals/libressl/crypto/cms/cms_env.c
vendored
Executable file
@@ -0,0 +1,978 @@
|
||||
/* $OpenBSD: cms_env.c,v 1.23 2019/10/04 18:03:56 tb Exp $ */
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/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
|
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* project.
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*/
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/* ====================================================================
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* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. All advertising materials mentioning features or use of this
|
||||
* software must display the following acknowledgment:
|
||||
* "This product includes software developed by the OpenSSL Project
|
||||
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
||||
*
|
||||
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
||||
* endorse or promote products derived from this software without
|
||||
* prior written permission. For written permission, please contact
|
||||
* licensing@OpenSSL.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "OpenSSL"
|
||||
* nor may "OpenSSL" appear in their names without prior written
|
||||
* permission of the OpenSSL Project.
|
||||
*
|
||||
* 6. Redistributions of any form whatsoever must retain the following
|
||||
* acknowledgment:
|
||||
* "This product includes software developed by the OpenSSL Project
|
||||
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
||||
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
||||
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*/
|
||||
|
||||
#include <string.h>
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|
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#include "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/pem.h>
|
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#include <openssl/x509v3.h>
|
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#include <openssl/err.h>
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#include <openssl/cms.h>
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#include <openssl/aes.h>
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#include "cms_lcl.h"
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#include "asn1/asn1_locl.h"
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#include "evp/evp_locl.h"
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/* CMS EnvelopedData Utilities */
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|
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CMS_EnvelopedData *
|
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cms_get0_enveloped(CMS_ContentInfo *cms)
|
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{
|
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if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) {
|
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CMSerror(CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
|
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return NULL;
|
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}
|
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return cms->d.envelopedData;
|
||||
}
|
||||
|
||||
static CMS_EnvelopedData *
|
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cms_enveloped_data_init(CMS_ContentInfo *cms)
|
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{
|
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if (cms->d.other == NULL) {
|
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cms->d.envelopedData = (CMS_EnvelopedData *)ASN1_item_new(&CMS_EnvelopedData_it);
|
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if (!cms->d.envelopedData) {
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CMSerror(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
|
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cms->d.envelopedData->version = 0;
|
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cms->d.envelopedData->encryptedContentInfo->contentType =
|
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OBJ_nid2obj(NID_pkcs7_data);
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ASN1_OBJECT_free(cms->contentType);
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cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
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return cms->d.envelopedData;
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}
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return cms_get0_enveloped(cms);
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}
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int
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cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
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{
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EVP_PKEY *pkey;
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int i;
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|
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if (ri->type == CMS_RECIPINFO_TRANS)
|
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pkey = ri->d.ktri->pkey;
|
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else if (ri->type == CMS_RECIPINFO_AGREE) {
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EVP_PKEY_CTX *pctx = ri->d.kari->pctx;
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if (!pctx)
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return 0;
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pkey = EVP_PKEY_CTX_get0_pkey(pctx);
|
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if (!pkey)
|
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return 0;
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} else
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return 0;
|
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if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
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return 1;
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i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri);
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if (i == -2) {
|
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CMSerror(CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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return 0;
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}
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if (i <= 0) {
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CMSerror(CMS_R_CTRL_FAILURE);
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return 0;
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}
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return 1;
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}
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STACK_OF(CMS_RecipientInfo) *
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CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
|
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{
|
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CMS_EnvelopedData *env;
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|
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env = cms_get0_enveloped(cms);
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if (!env)
|
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return NULL;
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|
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return env->recipientInfos;
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}
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int
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CMS_RecipientInfo_type(CMS_RecipientInfo *ri)
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{
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return ri->type;
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}
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EVP_PKEY_CTX *
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CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri)
|
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{
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if (ri->type == CMS_RECIPINFO_TRANS)
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return ri->d.ktri->pctx;
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else if (ri->type == CMS_RECIPINFO_AGREE)
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return ri->d.kari->pctx;
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return NULL;
|
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}
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CMS_ContentInfo *
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CMS_EnvelopedData_create(const EVP_CIPHER *cipher)
|
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{
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CMS_ContentInfo *cms;
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CMS_EnvelopedData *env;
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cms = CMS_ContentInfo_new();
|
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if (cms == NULL)
|
||||
goto merr;
|
||||
env = cms_enveloped_data_init(cms);
|
||||
if (env == NULL)
|
||||
goto merr;
|
||||
if (!cms_EncryptedContent_init(env->encryptedContentInfo, cipher,
|
||||
NULL, 0))
|
||||
goto merr;
|
||||
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return cms;
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|
||||
merr:
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CMS_ContentInfo_free(cms);
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CMSerror(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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/* Key Transport Recipient Info (KTRI) routines */
|
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||||
/* Initialise a ktri based on passed certificate and key */
|
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|
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static int
|
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cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip, EVP_PKEY *pk,
|
||||
unsigned int flags)
|
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{
|
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CMS_KeyTransRecipientInfo *ktri;
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int idtype;
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|
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ri->d.ktri = (CMS_KeyTransRecipientInfo *)ASN1_item_new(&CMS_KeyTransRecipientInfo_it);
|
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if (!ri->d.ktri)
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return 0;
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ri->type = CMS_RECIPINFO_TRANS;
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ktri = ri->d.ktri;
|
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|
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if (flags & CMS_USE_KEYID) {
|
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ktri->version = 2;
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idtype = CMS_RECIPINFO_KEYIDENTIFIER;
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} else {
|
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ktri->version = 0;
|
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idtype = CMS_RECIPINFO_ISSUER_SERIAL;
|
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}
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/*
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* Not a typo: RecipientIdentifier and SignerIdentifier are the same
|
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* structure.
|
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*/
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if (!cms_set1_SignerIdentifier(ktri->rid, recip, idtype))
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return 0;
|
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|
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X509_up_ref(recip);
|
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EVP_PKEY_up_ref(pk);
|
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|
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ktri->pkey = pk;
|
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ktri->recip = recip;
|
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|
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if (flags & CMS_KEY_PARAM) {
|
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ktri->pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
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if (ktri->pctx == NULL)
|
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return 0;
|
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if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0)
|
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return 0;
|
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} else if (!cms_env_asn1_ctrl(ri, 0))
|
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return 0;
|
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|
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return 1;
|
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}
|
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|
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/*
|
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* Add a recipient certificate using appropriate type of RecipientInfo
|
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*/
|
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|
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CMS_RecipientInfo *
|
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CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, unsigned int flags)
|
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{
|
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CMS_RecipientInfo *ri = NULL;
|
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CMS_EnvelopedData *env;
|
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EVP_PKEY *pk = NULL;
|
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|
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env = cms_get0_enveloped(cms);
|
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if (!env)
|
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goto err;
|
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|
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/* Initialize recipient info */
|
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ri = (CMS_RecipientInfo *)ASN1_item_new(&CMS_RecipientInfo_it);
|
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if (!ri)
|
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goto merr;
|
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|
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pk = X509_get0_pubkey(recip);
|
||||
if (!pk) {
|
||||
CMSerror(CMS_R_ERROR_GETTING_PUBLIC_KEY);
|
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goto err;
|
||||
}
|
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|
||||
switch (cms_pkey_get_ri_type(pk)) {
|
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|
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case CMS_RECIPINFO_TRANS:
|
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if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags))
|
||||
goto err;
|
||||
break;
|
||||
|
||||
case CMS_RECIPINFO_AGREE:
|
||||
if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags))
|
||||
goto err;
|
||||
break;
|
||||
|
||||
default:
|
||||
CMSerror(CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
|
||||
goto err;
|
||||
|
||||
}
|
||||
|
||||
if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
|
||||
goto merr;
|
||||
|
||||
return ri;
|
||||
|
||||
merr:
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
err:
|
||||
ASN1_item_free((ASN1_VALUE *)ri, &CMS_RecipientInfo_it);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri, EVP_PKEY **pk,
|
||||
X509 **recip, X509_ALGOR **palg)
|
||||
{
|
||||
CMS_KeyTransRecipientInfo *ktri;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_TRANS) {
|
||||
CMSerror(CMS_R_NOT_KEY_TRANSPORT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
ktri = ri->d.ktri;
|
||||
|
||||
if (pk)
|
||||
*pk = ktri->pkey;
|
||||
if (recip)
|
||||
*recip = ktri->recip;
|
||||
if (palg)
|
||||
*palg = ktri->keyEncryptionAlgorithm;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
|
||||
ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno)
|
||||
{
|
||||
CMS_KeyTransRecipientInfo *ktri;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_TRANS) {
|
||||
CMSerror(CMS_R_NOT_KEY_TRANSPORT);
|
||||
return 0;
|
||||
}
|
||||
ktri = ri->d.ktri;
|
||||
|
||||
return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
|
||||
{
|
||||
if (ri->type != CMS_RECIPINFO_TRANS) {
|
||||
CMSerror(CMS_R_NOT_KEY_TRANSPORT);
|
||||
return -2;
|
||||
}
|
||||
|
||||
return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
|
||||
{
|
||||
if (ri->type != CMS_RECIPINFO_TRANS) {
|
||||
CMSerror(CMS_R_NOT_KEY_TRANSPORT);
|
||||
return 0;
|
||||
}
|
||||
EVP_PKEY_free(ri->d.ktri->pkey);
|
||||
ri->d.ktri->pkey = pkey;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Encrypt content key in key transport recipient info */
|
||||
|
||||
static int
|
||||
cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
CMS_KeyTransRecipientInfo *ktri;
|
||||
CMS_EncryptedContentInfo *ec;
|
||||
EVP_PKEY_CTX *pctx;
|
||||
unsigned char *ek = NULL;
|
||||
size_t eklen;
|
||||
|
||||
int ret = 0;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_TRANS) {
|
||||
CMSerror(CMS_R_NOT_KEY_TRANSPORT);
|
||||
return 0;
|
||||
}
|
||||
ktri = ri->d.ktri;
|
||||
ec = cms->d.envelopedData->encryptedContentInfo;
|
||||
|
||||
pctx = ktri->pctx;
|
||||
|
||||
if (pctx) {
|
||||
if (!cms_env_asn1_ctrl(ri, 0))
|
||||
goto err;
|
||||
} else {
|
||||
pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
|
||||
if (pctx == NULL)
|
||||
return 0;
|
||||
|
||||
if (EVP_PKEY_encrypt_init(pctx) <= 0)
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
|
||||
EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
|
||||
CMSerror(CMS_R_CTRL_ERROR);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
|
||||
goto err;
|
||||
|
||||
ek = malloc(eklen);
|
||||
|
||||
if (ek == NULL) {
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
|
||||
goto err;
|
||||
|
||||
ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
|
||||
ek = NULL;
|
||||
|
||||
ret = 1;
|
||||
|
||||
err:
|
||||
EVP_PKEY_CTX_free(pctx);
|
||||
ktri->pctx = NULL;
|
||||
free(ek);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Decrypt content key from KTRI */
|
||||
|
||||
static int
|
||||
cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
|
||||
EVP_PKEY *pkey = ktri->pkey;
|
||||
unsigned char *ek = NULL;
|
||||
size_t eklen;
|
||||
size_t fixlen = 0;
|
||||
int ret = 0;
|
||||
CMS_EncryptedContentInfo *ec;
|
||||
|
||||
ec = cms->d.envelopedData->encryptedContentInfo;
|
||||
|
||||
if (ktri->pkey == NULL) {
|
||||
CMSerror(CMS_R_NO_PRIVATE_KEY);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (cms->d.envelopedData->encryptedContentInfo->havenocert &&
|
||||
!cms->d.envelopedData->encryptedContentInfo->debug) {
|
||||
X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
|
||||
const EVP_CIPHER *ciph;
|
||||
|
||||
if ((ciph = EVP_get_cipherbyobj(calg->algorithm)) == NULL) {
|
||||
CMSerror(CMS_R_UNKNOWN_CIPHER);
|
||||
return 0;
|
||||
}
|
||||
|
||||
fixlen = EVP_CIPHER_key_length(ciph);
|
||||
}
|
||||
|
||||
ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
|
||||
if (ktri->pctx == NULL)
|
||||
return 0;
|
||||
|
||||
if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
|
||||
goto err;
|
||||
|
||||
if (!cms_env_asn1_ctrl(ri, 1))
|
||||
goto err;
|
||||
|
||||
if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
|
||||
EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
|
||||
CMSerror(CMS_R_CTRL_ERROR);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen, ktri->encryptedKey->data,
|
||||
ktri->encryptedKey->length) <= 0 || eklen == 0 ||
|
||||
(fixlen != 0 && eklen != fixlen)) {
|
||||
CMSerror(CMS_R_CMS_LIB);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ek = malloc(eklen);
|
||||
|
||||
if (ek == NULL) {
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen, ktri->encryptedKey->data,
|
||||
ktri->encryptedKey->length) <= 0) {
|
||||
CMSerror(CMS_R_CMS_LIB);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = 1;
|
||||
|
||||
freezero(ec->key, ec->keylen);
|
||||
ec->key = ek;
|
||||
ec->keylen = eklen;
|
||||
|
||||
err:
|
||||
EVP_PKEY_CTX_free(ktri->pctx);
|
||||
ktri->pctx = NULL;
|
||||
if (!ret)
|
||||
free(ek);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Key Encrypted Key (KEK) RecipientInfo routines */
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri, const unsigned char *id,
|
||||
size_t idlen)
|
||||
{
|
||||
ASN1_OCTET_STRING tmp_os;
|
||||
CMS_KEKRecipientInfo *kekri;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_KEK) {
|
||||
CMSerror(CMS_R_NOT_KEK);
|
||||
return -2;
|
||||
}
|
||||
kekri = ri->d.kekri;
|
||||
tmp_os.type = V_ASN1_OCTET_STRING;
|
||||
tmp_os.flags = 0;
|
||||
tmp_os.data = (unsigned char *)id;
|
||||
tmp_os.length = (int)idlen;
|
||||
|
||||
return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
|
||||
}
|
||||
|
||||
/* For now hard code AES key wrap info */
|
||||
|
||||
static size_t
|
||||
aes_wrap_keylen(int nid)
|
||||
{
|
||||
switch (nid) {
|
||||
case NID_id_aes128_wrap:
|
||||
return 16;
|
||||
|
||||
case NID_id_aes192_wrap:
|
||||
return 24;
|
||||
|
||||
case NID_id_aes256_wrap:
|
||||
return 32;
|
||||
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
CMS_RecipientInfo *
|
||||
CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid, unsigned char *key,
|
||||
size_t keylen, unsigned char *id, size_t idlen, ASN1_GENERALIZEDTIME *date,
|
||||
ASN1_OBJECT *otherTypeId, ASN1_TYPE *otherType)
|
||||
{
|
||||
CMS_RecipientInfo *ri = NULL;
|
||||
CMS_EnvelopedData *env;
|
||||
CMS_KEKRecipientInfo *kekri;
|
||||
|
||||
env = cms_get0_enveloped(cms);
|
||||
if (!env)
|
||||
goto err;
|
||||
|
||||
if (nid == NID_undef) {
|
||||
switch (keylen) {
|
||||
case 16:
|
||||
nid = NID_id_aes128_wrap;
|
||||
break;
|
||||
|
||||
case 24:
|
||||
nid = NID_id_aes192_wrap;
|
||||
break;
|
||||
|
||||
case 32:
|
||||
nid = NID_id_aes256_wrap;
|
||||
break;
|
||||
|
||||
default:
|
||||
CMSerror(CMS_R_INVALID_KEY_LENGTH);
|
||||
goto err;
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
size_t exp_keylen = aes_wrap_keylen(nid);
|
||||
|
||||
if (!exp_keylen) {
|
||||
CMSerror(CMS_R_UNSUPPORTED_KEK_ALGORITHM);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (keylen != exp_keylen) {
|
||||
CMSerror(CMS_R_INVALID_KEY_LENGTH);
|
||||
goto err;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Initialize recipient info */
|
||||
ri = (CMS_RecipientInfo *)ASN1_item_new(&CMS_RecipientInfo_it);
|
||||
if (!ri)
|
||||
goto merr;
|
||||
|
||||
ri->d.kekri = (CMS_KEKRecipientInfo *)ASN1_item_new(&CMS_KEKRecipientInfo_it);
|
||||
if (!ri->d.kekri)
|
||||
goto merr;
|
||||
ri->type = CMS_RECIPINFO_KEK;
|
||||
|
||||
kekri = ri->d.kekri;
|
||||
|
||||
if (otherTypeId) {
|
||||
kekri->kekid->other = (CMS_OtherKeyAttribute *)ASN1_item_new(&CMS_OtherKeyAttribute_it);
|
||||
if (kekri->kekid->other == NULL)
|
||||
goto merr;
|
||||
}
|
||||
|
||||
if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
|
||||
goto merr;
|
||||
|
||||
/* After this point no calls can fail */
|
||||
|
||||
kekri->version = 4;
|
||||
|
||||
kekri->key = key;
|
||||
kekri->keylen = keylen;
|
||||
|
||||
ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
|
||||
|
||||
kekri->kekid->date = date;
|
||||
|
||||
if (kekri->kekid->other) {
|
||||
kekri->kekid->other->keyAttrId = otherTypeId;
|
||||
kekri->kekid->other->keyAttr = otherType;
|
||||
}
|
||||
|
||||
X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
|
||||
OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
|
||||
|
||||
return ri;
|
||||
|
||||
merr:
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
err:
|
||||
ASN1_item_free((ASN1_VALUE *)ri, &CMS_RecipientInfo_it);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, X509_ALGOR **palg,
|
||||
ASN1_OCTET_STRING **pid, ASN1_GENERALIZEDTIME **pdate,
|
||||
ASN1_OBJECT **potherid, ASN1_TYPE **pothertype)
|
||||
{
|
||||
CMS_KEKIdentifier *rkid;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_KEK) {
|
||||
CMSerror(CMS_R_NOT_KEK);
|
||||
return 0;
|
||||
}
|
||||
rkid = ri->d.kekri->kekid;
|
||||
if (palg)
|
||||
*palg = ri->d.kekri->keyEncryptionAlgorithm;
|
||||
if (pid)
|
||||
*pid = rkid->keyIdentifier;
|
||||
if (pdate)
|
||||
*pdate = rkid->date;
|
||||
if (potherid) {
|
||||
if (rkid->other)
|
||||
*potherid = rkid->other->keyAttrId;
|
||||
else
|
||||
*potherid = NULL;
|
||||
}
|
||||
if (pothertype) {
|
||||
if (rkid->other)
|
||||
*pothertype = rkid->other->keyAttr;
|
||||
else
|
||||
*pothertype = NULL;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri, unsigned char *key,
|
||||
size_t keylen)
|
||||
{
|
||||
CMS_KEKRecipientInfo *kekri;
|
||||
|
||||
if (ri->type != CMS_RECIPINFO_KEK) {
|
||||
CMSerror(CMS_R_NOT_KEK);
|
||||
return 0;
|
||||
}
|
||||
|
||||
kekri = ri->d.kekri;
|
||||
kekri->key = key;
|
||||
kekri->keylen = keylen;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Encrypt content key in KEK recipient info */
|
||||
|
||||
static int
|
||||
cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
CMS_EncryptedContentInfo *ec;
|
||||
CMS_KEKRecipientInfo *kekri;
|
||||
AES_KEY actx;
|
||||
unsigned char *wkey = NULL;
|
||||
int wkeylen;
|
||||
int r = 0;
|
||||
|
||||
ec = cms->d.envelopedData->encryptedContentInfo;
|
||||
kekri = ri->d.kekri;
|
||||
|
||||
if (!kekri->key) {
|
||||
CMSerror(CMS_R_NO_KEY);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
||||
CMSerror(CMS_R_ERROR_SETTING_KEY);
|
||||
goto err;
|
||||
}
|
||||
|
||||
wkey = malloc(ec->keylen + 8);
|
||||
if (wkey == NULL) {
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
|
||||
if (wkeylen <= 0) {
|
||||
CMSerror(CMS_R_WRAP_ERROR);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
|
||||
|
||||
r = 1;
|
||||
|
||||
err:
|
||||
if (!r)
|
||||
free(wkey);
|
||||
explicit_bzero(&actx, sizeof(actx));
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* Decrypt content key in KEK recipient info */
|
||||
|
||||
static int
|
||||
cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
CMS_EncryptedContentInfo *ec;
|
||||
CMS_KEKRecipientInfo *kekri;
|
||||
AES_KEY actx;
|
||||
unsigned char *ukey = NULL;
|
||||
int ukeylen;
|
||||
int r = 0, wrap_nid;
|
||||
|
||||
ec = cms->d.envelopedData->encryptedContentInfo;
|
||||
kekri = ri->d.kekri;
|
||||
|
||||
if (!kekri->key) {
|
||||
CMSerror(CMS_R_NO_KEY);
|
||||
return 0;
|
||||
}
|
||||
|
||||
wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
|
||||
if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
|
||||
CMSerror(CMS_R_INVALID_KEY_LENGTH);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* If encrypted key length is invalid don't bother */
|
||||
|
||||
if (kekri->encryptedKey->length < 16) {
|
||||
CMSerror(CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
||||
CMSerror(CMS_R_ERROR_SETTING_KEY);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ukey = malloc(kekri->encryptedKey->length - 8);
|
||||
if (ukey == NULL) {
|
||||
CMSerror(ERR_R_MALLOC_FAILURE);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ukeylen = AES_unwrap_key(&actx, NULL, ukey, kekri->encryptedKey->data,
|
||||
kekri->encryptedKey->length);
|
||||
|
||||
if (ukeylen <= 0) {
|
||||
CMSerror(CMS_R_UNWRAP_ERROR);
|
||||
goto err;
|
||||
}
|
||||
|
||||
ec->key = ukey;
|
||||
ec->keylen = ukeylen;
|
||||
|
||||
r = 1;
|
||||
|
||||
err:
|
||||
|
||||
if (!r)
|
||||
free(ukey);
|
||||
explicit_bzero(&actx, sizeof(actx));
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
switch (ri->type) {
|
||||
case CMS_RECIPINFO_TRANS:
|
||||
return cms_RecipientInfo_ktri_decrypt(cms, ri);
|
||||
|
||||
case CMS_RECIPINFO_KEK:
|
||||
return cms_RecipientInfo_kekri_decrypt(cms, ri);
|
||||
|
||||
case CMS_RECIPINFO_PASS:
|
||||
return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
|
||||
|
||||
default:
|
||||
CMSerror(CMS_R_UNSUPPORTED_RECIPIENTINFO_TYPE);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
||||
{
|
||||
switch (ri->type) {
|
||||
case CMS_RECIPINFO_TRANS:
|
||||
return cms_RecipientInfo_ktri_encrypt(cms, ri);
|
||||
|
||||
case CMS_RECIPINFO_AGREE:
|
||||
return cms_RecipientInfo_kari_encrypt(cms, ri);
|
||||
|
||||
case CMS_RECIPINFO_KEK:
|
||||
return cms_RecipientInfo_kekri_encrypt(cms, ri);
|
||||
|
||||
case CMS_RECIPINFO_PASS:
|
||||
return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
|
||||
|
||||
default:
|
||||
CMSerror(CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check structures and fixup version numbers (if necessary) */
|
||||
|
||||
static void
|
||||
cms_env_set_originfo_version(CMS_EnvelopedData *env)
|
||||
{
|
||||
CMS_OriginatorInfo *org = env->originatorInfo;
|
||||
int i;
|
||||
|
||||
if (org == NULL)
|
||||
return;
|
||||
for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
|
||||
CMS_CertificateChoices *cch;
|
||||
|
||||
cch = sk_CMS_CertificateChoices_value(org->certificates, i);
|
||||
if (cch->type == CMS_CERTCHOICE_OTHER) {
|
||||
env->version = 4;
|
||||
return;
|
||||
} else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
|
||||
if (env->version < 3)
|
||||
env->version = 3;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
|
||||
CMS_RevocationInfoChoice *rch;
|
||||
|
||||
rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
|
||||
if (rch->type == CMS_REVCHOICE_OTHER) {
|
||||
env->version = 4;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
cms_env_set_version(CMS_EnvelopedData *env)
|
||||
{
|
||||
int i;
|
||||
CMS_RecipientInfo *ri;
|
||||
|
||||
/*
|
||||
* Can't set version higher than 4 so if 4 or more already nothing to do.
|
||||
*/
|
||||
if (env->version >= 4)
|
||||
return;
|
||||
|
||||
cms_env_set_originfo_version(env);
|
||||
|
||||
if (env->version >= 3)
|
||||
return;
|
||||
|
||||
for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
|
||||
ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
|
||||
if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
|
||||
env->version = 3;
|
||||
return;
|
||||
} else if (ri->type != CMS_RECIPINFO_TRANS
|
||||
|| ri->d.ktri->version != 0) {
|
||||
env->version = 2;
|
||||
}
|
||||
}
|
||||
if (env->originatorInfo || env->unprotectedAttrs)
|
||||
env->version = 2;
|
||||
if (env->version == 2)
|
||||
return;
|
||||
env->version = 0;
|
||||
}
|
||||
|
||||
BIO *
|
||||
cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
|
||||
{
|
||||
CMS_EncryptedContentInfo *ec;
|
||||
STACK_OF(CMS_RecipientInfo) *rinfos;
|
||||
CMS_RecipientInfo *ri;
|
||||
int i, ok = 0;
|
||||
BIO *ret;
|
||||
|
||||
/* Get BIO first to set up key */
|
||||
|
||||
ec = cms->d.envelopedData->encryptedContentInfo;
|
||||
ret = cms_EncryptedContent_init_bio(ec);
|
||||
|
||||
/* If error or no cipher end of processing */
|
||||
|
||||
if (!ret || !ec->cipher)
|
||||
return ret;
|
||||
|
||||
/* Now encrypt content key according to each RecipientInfo type */
|
||||
|
||||
rinfos = cms->d.envelopedData->recipientInfos;
|
||||
|
||||
for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
|
||||
ri = sk_CMS_RecipientInfo_value(rinfos, i);
|
||||
if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
|
||||
CMSerror(CMS_R_ERROR_SETTING_RECIPIENTINFO);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
cms_env_set_version(cms->d.envelopedData);
|
||||
|
||||
ok = 1;
|
||||
|
||||
err:
|
||||
ec->cipher = NULL;
|
||||
freezero(ec->key, ec->keylen);
|
||||
ec->key = NULL;
|
||||
ec->keylen = 0;
|
||||
if (ok)
|
||||
return ret;
|
||||
BIO_free(ret);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Get RecipientInfo type (if any) supported by a key (public or private). To
|
||||
* retain compatibility with previous behaviour if the ctrl value isn't
|
||||
* supported we assume key transport.
|
||||
*/
|
||||
int
|
||||
cms_pkey_get_ri_type(EVP_PKEY *pk)
|
||||
{
|
||||
if (pk->ameth && pk->ameth->pkey_ctrl) {
|
||||
int i, r;
|
||||
i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
|
||||
if (i > 0)
|
||||
return r;
|
||||
}
|
||||
return CMS_RECIPINFO_TRANS;
|
||||
}
|
||||
Reference in New Issue
Block a user