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 | |
24 | CMS_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 | |
63 | BIO *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 | |