903 lines
23 KiB
C
903 lines
23 KiB
C
/*
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* Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/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/rand.h>
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#include <openssl/aes.h>
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#include "cms_lcl.h"
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#include "internal/asn1_int.h"
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#include "internal/evp_int.h"
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/* CMS EnvelopedData Utilities */
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CMS_EnvelopedData *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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CMSerr(CMS_F_CMS_GET0_ENVELOPED,
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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;
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}
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static CMS_EnvelopedData *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 = M_ASN1_new_of(CMS_EnvelopedData);
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if (!cms->d.envelopedData) {
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CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT, 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 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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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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CMSerr(CMS_F_CMS_ENV_ASN1_CTRL,
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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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CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, 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) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
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{
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CMS_EnvelopedData *env;
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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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return env->recipientInfos;
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}
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int 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 *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 *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)
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goto merr;
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env = cms_enveloped_data_init(cms);
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if (env == NULL)
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goto merr;
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if (!cms_EncryptedContent_init(env->encryptedContentInfo,
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cipher, NULL, 0))
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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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CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE, 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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static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip,
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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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ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
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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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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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X509_up_ref(recip);
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EVP_PKEY_up_ref(pk);
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ktri->pkey = pk;
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ktri->recip = recip;
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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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return 1;
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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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CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms,
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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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env = cms_get0_enveloped(cms);
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if (!env)
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goto err;
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/* Initialize recipient info */
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ri = M_ASN1_new_of(CMS_RecipientInfo);
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if (!ri)
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goto merr;
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pk = X509_get0_pubkey(recip);
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if (!pk) {
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CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, CMS_R_ERROR_GETTING_PUBLIC_KEY);
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goto err;
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}
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switch (cms_pkey_get_ri_type(pk)) {
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case CMS_RECIPINFO_TRANS:
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if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags))
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goto err;
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break;
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case CMS_RECIPINFO_AGREE:
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if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags))
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goto err;
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break;
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default:
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CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
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CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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goto err;
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}
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if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
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goto merr;
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return ri;
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merr:
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CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
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err:
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M_ASN1_free_of(ri, CMS_RecipientInfo);
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return NULL;
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}
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int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
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EVP_PKEY **pk, X509 **recip,
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X509_ALGOR **palg)
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{
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CMS_KeyTransRecipientInfo *ktri;
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if (ri->type != CMS_RECIPINFO_TRANS) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
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CMS_R_NOT_KEY_TRANSPORT);
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return 0;
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}
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ktri = ri->d.ktri;
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if (pk)
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*pk = ktri->pkey;
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if (recip)
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*recip = ktri->recip;
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if (palg)
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*palg = ktri->keyEncryptionAlgorithm;
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return 1;
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}
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int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
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ASN1_OCTET_STRING **keyid,
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X509_NAME **issuer,
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ASN1_INTEGER **sno)
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{
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CMS_KeyTransRecipientInfo *ktri;
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if (ri->type != CMS_RECIPINFO_TRANS) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
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CMS_R_NOT_KEY_TRANSPORT);
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return 0;
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}
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ktri = ri->d.ktri;
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return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
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}
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int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
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{
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if (ri->type != CMS_RECIPINFO_TRANS) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
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CMS_R_NOT_KEY_TRANSPORT);
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return -2;
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}
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return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
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}
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int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
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{
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if (ri->type != CMS_RECIPINFO_TRANS) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
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return 0;
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}
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ri->d.ktri->pkey = pkey;
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return 1;
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}
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/* Encrypt content key in key transport recipient info */
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static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
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CMS_RecipientInfo *ri)
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{
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CMS_KeyTransRecipientInfo *ktri;
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CMS_EncryptedContentInfo *ec;
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EVP_PKEY_CTX *pctx;
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unsigned char *ek = NULL;
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size_t eklen;
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int ret = 0;
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if (ri->type != CMS_RECIPINFO_TRANS) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
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return 0;
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}
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ktri = ri->d.ktri;
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ec = cms->d.envelopedData->encryptedContentInfo;
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pctx = ktri->pctx;
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if (pctx) {
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if (!cms_env_asn1_ctrl(ri, 0))
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goto err;
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} else {
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pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
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if (pctx == NULL)
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return 0;
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if (EVP_PKEY_encrypt_init(pctx) <= 0)
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goto err;
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}
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if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
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EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
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goto err;
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}
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if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
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goto err;
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ek = OPENSSL_malloc(eklen);
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if (ek == NULL) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
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goto err;
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ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
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ek = NULL;
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ret = 1;
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err:
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EVP_PKEY_CTX_free(pctx);
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ktri->pctx = NULL;
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OPENSSL_free(ek);
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return ret;
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}
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/* Decrypt content key from KTRI */
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static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
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CMS_RecipientInfo *ri)
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{
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CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
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EVP_PKEY *pkey = ktri->pkey;
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unsigned char *ek = NULL;
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size_t eklen;
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int ret = 0;
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CMS_EncryptedContentInfo *ec;
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ec = cms->d.envelopedData->encryptedContentInfo;
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if (ktri->pkey == NULL) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
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return 0;
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}
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ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
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if (ktri->pctx == NULL)
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return 0;
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if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
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goto err;
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if (!cms_env_asn1_ctrl(ri, 1))
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goto err;
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if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
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EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
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goto err;
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}
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if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
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ktri->encryptedKey->data,
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ktri->encryptedKey->length) <= 0)
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goto err;
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ek = OPENSSL_malloc(eklen);
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if (ek == NULL) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
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ktri->encryptedKey->data,
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ktri->encryptedKey->length) <= 0) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
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goto err;
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}
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ret = 1;
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OPENSSL_clear_free(ec->key, ec->keylen);
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ec->key = ek;
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ec->keylen = eklen;
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err:
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EVP_PKEY_CTX_free(ktri->pctx);
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ktri->pctx = NULL;
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if (!ret)
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OPENSSL_free(ek);
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return ret;
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}
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/* Key Encrypted Key (KEK) RecipientInfo routines */
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int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
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const unsigned char *id, size_t idlen)
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{
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ASN1_OCTET_STRING tmp_os;
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CMS_KEKRecipientInfo *kekri;
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if (ri->type != CMS_RECIPINFO_KEK) {
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CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
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return -2;
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}
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kekri = ri->d.kekri;
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tmp_os.type = V_ASN1_OCTET_STRING;
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tmp_os.flags = 0;
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tmp_os.data = (unsigned char *)id;
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tmp_os.length = (int)idlen;
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return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
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}
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/* For now hard code AES key wrap info */
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static size_t aes_wrap_keylen(int nid)
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{
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switch (nid) {
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case NID_id_aes128_wrap:
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return 16;
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case NID_id_aes192_wrap:
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return 24;
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case NID_id_aes256_wrap:
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return 32;
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default:
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return 0;
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}
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}
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CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
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unsigned char *key, size_t keylen,
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unsigned char *id, size_t idlen,
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ASN1_GENERALIZEDTIME *date,
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ASN1_OBJECT *otherTypeId,
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ASN1_TYPE *otherType)
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{
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CMS_RecipientInfo *ri = NULL;
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CMS_EnvelopedData *env;
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CMS_KEKRecipientInfo *kekri;
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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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if (nid == NID_undef) {
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switch (keylen) {
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case 16:
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nid = NID_id_aes128_wrap;
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break;
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case 24:
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nid = NID_id_aes192_wrap;
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break;
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case 32:
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nid = NID_id_aes256_wrap;
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break;
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default:
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CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
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goto err;
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}
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} else {
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size_t exp_keylen = aes_wrap_keylen(nid);
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if (!exp_keylen) {
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CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
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CMS_R_UNSUPPORTED_KEK_ALGORITHM);
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goto err;
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}
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if (keylen != exp_keylen) {
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CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
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goto err;
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}
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}
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/* Initialize recipient info */
|
|
ri = M_ASN1_new_of(CMS_RecipientInfo);
|
|
if (!ri)
|
|
goto merr;
|
|
|
|
ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
|
|
if (!ri->d.kekri)
|
|
goto merr;
|
|
ri->type = CMS_RECIPINFO_KEK;
|
|
|
|
kekri = ri->d.kekri;
|
|
|
|
if (otherTypeId) {
|
|
kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
|
|
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:
|
|
CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
|
|
err:
|
|
M_ASN1_free_of(ri, CMS_RecipientInfo);
|
|
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) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, 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) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, 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) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
|
|
return 0;
|
|
}
|
|
|
|
if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
|
|
CMS_R_ERROR_SETTING_KEY);
|
|
goto err;
|
|
}
|
|
|
|
wkey = OPENSSL_malloc(ec->keylen + 8);
|
|
|
|
if (wkey == NULL) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
|
|
|
|
if (wkeylen <= 0) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
|
|
|
|
r = 1;
|
|
|
|
err:
|
|
|
|
if (!r)
|
|
OPENSSL_free(wkey);
|
|
OPENSSL_cleanse(&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) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
|
|
return 0;
|
|
}
|
|
|
|
wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
|
|
if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
|
CMS_R_INVALID_KEY_LENGTH);
|
|
return 0;
|
|
}
|
|
|
|
/* If encrypted key length is invalid don't bother */
|
|
|
|
if (kekri->encryptedKey->length < 16) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
|
CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
|
|
goto err;
|
|
}
|
|
|
|
if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
|
CMS_R_ERROR_SETTING_KEY);
|
|
goto err;
|
|
}
|
|
|
|
ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
|
|
|
|
if (ukey == NULL) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
ukeylen = AES_unwrap_key(&actx, NULL, ukey,
|
|
kekri->encryptedKey->data,
|
|
kekri->encryptedKey->length);
|
|
|
|
if (ukeylen <= 0) {
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
ec->key = ukey;
|
|
ec->keylen = ukeylen;
|
|
|
|
r = 1;
|
|
|
|
err:
|
|
|
|
if (!r)
|
|
OPENSSL_free(ukey);
|
|
OPENSSL_cleanse(&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:
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
|
|
CMS_R_UNSUPPORTED_RECPIENTINFO_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:
|
|
CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
|
|
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) {
|
|
CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
|
|
CMS_R_ERROR_SETTING_RECIPIENTINFO);
|
|
goto err;
|
|
}
|
|
}
|
|
cms_env_set_version(cms->d.envelopedData);
|
|
|
|
ok = 1;
|
|
|
|
err:
|
|
ec->cipher = NULL;
|
|
OPENSSL_clear_free(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;
|
|
}
|