1 /* 2 * Copyright 2008-2021 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 *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 X509_ALGOR_set0(cd->compressionAlgorithm, 54 OBJ_nid2obj(NID_zlib_compression), V_ASN1_UNDEF, NULL); 55 56 cd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); 57 58 return cms; 59 60 err: 61 CMS_ContentInfo_free(cms); 62 return NULL; 63 } 64 65 BIO *ossl_cms_CompressedData_init_bio(const CMS_ContentInfo *cms) 66 { 67 CMS_CompressedData *cd; 68 const ASN1_OBJECT *compoid; 69 70 if (OBJ_obj2nid(cms->contentType) != NID_id_smime_ct_compressedData) { 71 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_COMPRESSED_DATA); 72 return NULL; 73 } 74 cd = cms->d.compressedData; 75 X509_ALGOR_get0(&compoid, NULL, NULL, cd->compressionAlgorithm); 76 if (OBJ_obj2nid(compoid) != NID_zlib_compression) { 77 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 78 return NULL; 79 } 80 return BIO_new(BIO_f_zlib()); 81 } 82 83 #endif 84