/* * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (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 #include #include #include #include #include #include #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