1/*
2 * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include "internal/cryptlib.h"
11#include <openssl/asn1t.h>
12#include <openssl/pem.h>
13#include <openssl/x509v3.h>
14#include <openssl/err.h>
15#include <openssl/cms.h>
16#include <openssl/bio.h>
17#include <openssl/comp.h>
18#include "cms_local.h"
19
20#ifdef ZLIB
21
22/* CMS CompressedData Utilities */
23
24CMS_ContentInfo *cms_CompressedData_create(int comp_nid)
25{
26 CMS_ContentInfo *cms;
27 CMS_CompressedData *cd;
28 /*
29 * Will need something cleverer if there is ever more than one
30 * compression algorithm or parameters have some meaning...
31 */
32 if (comp_nid != NID_zlib_compression) {
33 CMSerr(CMS_F_CMS_COMPRESSEDDATA_CREATE,
34 CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
35 return NULL;
36 }
37 cms = CMS_ContentInfo_new();
38 if (cms == NULL)
39 return NULL;
40
41 cd = M_ASN1_new_of(CMS_CompressedData);
42
43 if (cd == NULL)
44 goto err;
45
46 cms->contentType = OBJ_nid2obj(NID_id_smime_ct_compressedData);
47 cms->d.compressedData = cd;
48
49 cd->version = 0;
50
51 X509_ALGOR_set0(cd->compressionAlgorithm,
52 OBJ_nid2obj(NID_zlib_compression), V_ASN1_UNDEF, NULL);
53
54 cd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
55
56 return cms;
57
58 err:
59 CMS_ContentInfo_free(cms);
60 return NULL;
61}
62
63BIO *cms_CompressedData_init_bio(const CMS_ContentInfo *cms)
64{
65 CMS_CompressedData *cd;
66 const ASN1_OBJECT *compoid;
67 if (OBJ_obj2nid(cms->contentType) != NID_id_smime_ct_compressedData) {
68 CMSerr(CMS_F_CMS_COMPRESSEDDATA_INIT_BIO,
69 CMS_R_CONTENT_TYPE_NOT_COMPRESSED_DATA);
70 return NULL;
71 }
72 cd = cms->d.compressedData;
73 X509_ALGOR_get0(&compoid, NULL, NULL, cd->compressionAlgorithm);
74 if (OBJ_obj2nid(compoid) != NID_zlib_compression) {
75 CMSerr(CMS_F_CMS_COMPRESSEDDATA_INIT_BIO,
76 CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
77 return NULL;
78 }
79 return BIO_new(BIO_f_zlib());
80}
81
82#endif
83