cms_cd.c
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/*
* Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/cms.h>
#include <openssl/bio.h>
#include <openssl/comp.h>
#include "cms_lcl.h"
#ifdef ZLIB
/* CMS CompressedData Utilities */
CMS_ContentInfo *cms_CompressedData_create(int comp_nid)
{
CMS_ContentInfo *cms;
CMS_CompressedData *cd;
/*
* Will need something cleverer if there is ever more than one
* compression algorithm or parameters have some meaning...
*/
if (comp_nid != NID_zlib_compression) {
CMSerr(CMS_F_CMS_COMPRESSEDDATA_CREATE,
CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
return NULL;
}
cms = CMS_ContentInfo_new();
if (cms == NULL)
return NULL;
cd = M_ASN1_new_of(CMS_CompressedData);
if (cd == NULL)
goto err;
cms->contentType = OBJ_nid2obj(NID_id_smime_ct_compressedData);
cms->d.compressedData = cd;
cd->version = 0;
X509_ALGOR_set0(cd->compressionAlgorithm,
OBJ_nid2obj(NID_zlib_compression), V_ASN1_UNDEF, NULL);
cd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
return cms;
err:
CMS_ContentInfo_free(cms);
return NULL;
}
BIO *cms_CompressedData_init_bio(CMS_ContentInfo *cms)
{
CMS_CompressedData *cd;
const ASN1_OBJECT *compoid;
if (OBJ_obj2nid(cms->contentType) != NID_id_smime_ct_compressedData) {
CMSerr(CMS_F_CMS_COMPRESSEDDATA_INIT_BIO,
CMS_R_CONTENT_TYPE_NOT_COMPRESSED_DATA);
return NULL;
}
cd = cms->d.compressedData;
X509_ALGOR_get0(&compoid, NULL, NULL, cd->compressionAlgorithm);
if (OBJ_obj2nid(compoid) != NID_zlib_compression) {
CMSerr(CMS_F_CMS_COMPRESSEDDATA_INIT_BIO,
CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
return NULL;
}
return BIO_new(BIO_f_zlib());
}
#endif