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8931b30d | 1 | /* crypto/cms/cms_dd.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
8931b30d DSH |
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 | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
8931b30d DSH |
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 "cryptlib.h" | |
56 | #include <openssl/asn1t.h> | |
57 | #include <openssl/pem.h> | |
58 | #include <openssl/x509v3.h> | |
59 | #include <openssl/err.h> | |
60 | #include <openssl/cms.h> | |
61 | #include "cms_lcl.h" | |
8931b30d DSH |
62 | |
63 | DECLARE_ASN1_ITEM(CMS_DigestedData) | |
64 | ||
65 | /* CMS DigestedData Utilities */ | |
66 | ||
67 | CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md) | |
0f113f3e MC |
68 | { |
69 | CMS_ContentInfo *cms; | |
70 | CMS_DigestedData *dd; | |
71 | cms = CMS_ContentInfo_new(); | |
72 | if (!cms) | |
73 | return NULL; | |
8931b30d | 74 | |
0f113f3e | 75 | dd = M_ASN1_new_of(CMS_DigestedData); |
8931b30d | 76 | |
0f113f3e MC |
77 | if (!dd) |
78 | goto err; | |
8931b30d | 79 | |
0f113f3e MC |
80 | cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); |
81 | cms->d.digestedData = dd; | |
8931b30d | 82 | |
0f113f3e MC |
83 | dd->version = 0; |
84 | dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); | |
8931b30d | 85 | |
0f113f3e | 86 | X509_ALGOR_set_md(dd->digestAlgorithm, md); |
8931b30d | 87 | |
0f113f3e | 88 | return cms; |
8931b30d | 89 | |
0f113f3e | 90 | err: |
8931b30d | 91 | |
0f113f3e MC |
92 | if (cms) |
93 | CMS_ContentInfo_free(cms); | |
8931b30d | 94 | |
0f113f3e MC |
95 | return NULL; |
96 | } | |
8931b30d DSH |
97 | |
98 | BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms) | |
0f113f3e MC |
99 | { |
100 | CMS_DigestedData *dd; | |
101 | dd = cms->d.digestedData; | |
102 | return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm); | |
103 | } | |
8931b30d DSH |
104 | |
105 | int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify) | |
0f113f3e MC |
106 | { |
107 | EVP_MD_CTX mctx; | |
108 | unsigned char md[EVP_MAX_MD_SIZE]; | |
109 | unsigned int mdlen; | |
110 | int r = 0; | |
111 | CMS_DigestedData *dd; | |
112 | EVP_MD_CTX_init(&mctx); | |
113 | ||
114 | dd = cms->d.digestedData; | |
115 | ||
116 | if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm)) | |
117 | goto err; | |
118 | ||
119 | if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0) | |
120 | goto err; | |
121 | ||
122 | if (verify) { | |
123 | if (mdlen != (unsigned int)dd->digest->length) { | |
124 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, | |
125 | CMS_R_MESSAGEDIGEST_WRONG_LENGTH); | |
126 | goto err; | |
127 | } | |
128 | ||
129 | if (memcmp(md, dd->digest->data, mdlen)) | |
130 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, | |
131 | CMS_R_VERIFICATION_FAILURE); | |
132 | else | |
133 | r = 1; | |
134 | } else { | |
135 | if (!ASN1_STRING_set(dd->digest, md, mdlen)) | |
136 | goto err; | |
137 | r = 1; | |
138 | } | |
139 | ||
140 | err: | |
141 | EVP_MD_CTX_cleanup(&mctx); | |
142 | ||
143 | return r; | |
144 | ||
145 | } |