1 /* $OpenBSD: cms_dd.c,v 1.14 2019/08/11 11:04:18 jsing Exp $ */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6 /* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55 #include <string.h>
56
57 #include "cryptlib.h"
58 #include <openssl/asn1t.h>
59 #include <openssl/pem.h>
60 #include <openssl/x509v3.h>
61 #include <openssl/err.h>
62 #include <openssl/cms.h>
63 #include "cms_lcl.h"
64
65 /* CMS DigestedData Utilities */
66
67 CMS_ContentInfo *
cms_DigestedData_create(const EVP_MD * md)68 cms_DigestedData_create(const EVP_MD *md)
69 {
70 CMS_ContentInfo *cms;
71 CMS_DigestedData *dd;
72
73 cms = CMS_ContentInfo_new();
74 if (cms == NULL)
75 return NULL;
76
77 dd = (CMS_DigestedData *)ASN1_item_new(&CMS_DigestedData_it);
78
79 if (dd == NULL)
80 goto err;
81
82 cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
83 cms->d.digestedData = dd;
84
85 dd->version = 0;
86 dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
87
88 X509_ALGOR_set_md(dd->digestAlgorithm, md);
89
90 return cms;
91
92 err:
93 CMS_ContentInfo_free(cms);
94
95 return NULL;
96 }
97
98 BIO *
cms_DigestedData_init_bio(CMS_ContentInfo * cms)99 cms_DigestedData_init_bio(CMS_ContentInfo *cms)
100 {
101 CMS_DigestedData *dd;
102
103 dd = cms->d.digestedData;
104
105 return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
106 }
107
108 int
cms_DigestedData_do_final(CMS_ContentInfo * cms,BIO * chain,int verify)109 cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
110 {
111 EVP_MD_CTX *mctx = EVP_MD_CTX_new();
112 unsigned char md[EVP_MAX_MD_SIZE];
113 unsigned int mdlen;
114 int r = 0;
115 CMS_DigestedData *dd;
116
117 if (mctx == NULL) {
118 CMSerror(ERR_R_MALLOC_FAILURE);
119 goto err;
120 }
121
122 dd = cms->d.digestedData;
123
124 if (!cms_DigestAlgorithm_find_ctx(mctx, chain, dd->digestAlgorithm))
125 goto err;
126
127 if (EVP_DigestFinal_ex(mctx, md, &mdlen) <= 0)
128 goto err;
129
130 if (verify) {
131 if (mdlen != (unsigned int)dd->digest->length) {
132 CMSerror(CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
133 goto err;
134 }
135
136 if (memcmp(md, dd->digest->data, mdlen))
137 CMSerror(CMS_R_VERIFICATION_FAILURE);
138 else
139 r = 1;
140 } else {
141 if (!ASN1_STRING_set(dd->digest, md, mdlen))
142 goto err;
143 r = 1;
144 }
145
146 err:
147 EVP_MD_CTX_free(mctx);
148
149 return r;
150 }
151