1 /*
2 * Copyright 2008-2022 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
ossl_cms_CompressedData_create(int comp_nid,OSSL_LIB_CTX * libctx,const char * propq)24 CMS_ContentInfo *ossl_cms_CompressedData_create(int comp_nid,
25 OSSL_LIB_CTX *libctx,
26 const char *propq)
27 {
28 CMS_ContentInfo *cms;
29 CMS_CompressedData *cd;
30
31 /*
32 * Will need something cleverer if there is ever more than one
33 * compression algorithm or parameters have some meaning...
34 */
35 if (comp_nid != NID_zlib_compression) {
36 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
37 return NULL;
38 }
39 cms = CMS_ContentInfo_new_ex(libctx, propq);
40 if (cms == NULL)
41 return NULL;
42
43 cd = M_ASN1_new_of(CMS_CompressedData);
44
45 if (cd == NULL)
46 goto err;
47
48 cms->contentType = OBJ_nid2obj(NID_id_smime_ct_compressedData);
49 cms->d.compressedData = cd;
50
51 cd->version = 0;
52
53 (void)X509_ALGOR_set0(cd->compressionAlgorithm,
54 OBJ_nid2obj(NID_zlib_compression),
55 V_ASN1_UNDEF, NULL); /* cannot fail */
56
57 cd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
58
59 return cms;
60
61 err:
62 CMS_ContentInfo_free(cms);
63 return NULL;
64 }
65
ossl_cms_CompressedData_init_bio(const CMS_ContentInfo * cms)66 BIO *ossl_cms_CompressedData_init_bio(const CMS_ContentInfo *cms)
67 {
68 CMS_CompressedData *cd;
69 const ASN1_OBJECT *compoid;
70
71 if (OBJ_obj2nid(cms->contentType) != NID_id_smime_ct_compressedData) {
72 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_COMPRESSED_DATA);
73 return NULL;
74 }
75 cd = cms->d.compressedData;
76 X509_ALGOR_get0(&compoid, NULL, NULL, cd->compressionAlgorithm);
77 if (OBJ_obj2nid(compoid) != NID_zlib_compression) {
78 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
79 return NULL;
80 }
81 return BIO_new(BIO_f_zlib());
82 }
83
84 #endif
85
