1 /* crypto/cms/cms_dd.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 */
53
54 #include "cryptlib.h"
55 #include <openssl/asn1t.h>
56 #include <openssl/pem.h>
57 #include <openssl/x509v3.h>
58 #include <openssl/err.h>
59 #include <openssl/cms.h>
60 #include "cms_lcl.h"
61
62 DECLARE_ASN1_ITEM(CMS_DigestedData)
63
64 /* CMS DigestedData Utilities */
65
66 CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md)
67 {
68 CMS_ContentInfo *cms;
69 CMS_DigestedData *dd;
70 cms = CMS_ContentInfo_new();
71 if (!cms)
72 return NULL;
73
74 dd = M_ASN1_new_of(CMS_DigestedData);
75
76 if (!dd)
77 goto err;
78
79 cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
80 cms->d.digestedData = dd;
81
82 dd->version = 0;
83 dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
84
85 cms_DigestAlgorithm_set(dd->digestAlgorithm, md);
86
87 return cms;
88
89 err:
90
91 if (cms)
92 CMS_ContentInfo_free(cms);
93
94 return NULL;
95 }
96
97 BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms)
98 {
99 CMS_DigestedData *dd;
100 dd = cms->d.digestedData;
101 return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
102 }
103
104 int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
105 {
106 EVP_MD_CTX mctx;
107 unsigned char md[EVP_MAX_MD_SIZE];
108 unsigned int mdlen;
109 int r = 0;
110 CMS_DigestedData *dd;
111 EVP_MD_CTX_init(&mctx);
112
113 dd = cms->d.digestedData;
114
115 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm))
116 goto err;
117
118 if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0)
119 goto err;
120
121 if (verify)
122 {
123 if (mdlen != (unsigned int)dd->digest->length)
124 {
125 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
126 CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
127 goto err;
128 }
129
130 if (memcmp(md, dd->digest->data, mdlen))
131 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
132 CMS_R_VERIFICATION_FAILURE);
133 else
134 r = 1;
135 }
136 else
137 {
138 if (!ASN1_STRING_set(dd->digest, md, mdlen))
139 goto err;
140 r = 1;
141 }
142
143 err:
144 EVP_MD_CTX_cleanup(&mctx);
145
146 return r;
147
148 }