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Commit | Line | Data |
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0f113f3e | 1 | /* |
b1322259 | 2 | * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. |
8931b30d | 3 | * |
08ddd302 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
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 | |
8931b30d DSH |
8 | */ |
9 | ||
b39fc560 | 10 | #include "internal/cryptlib.h" |
8931b30d DSH |
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> | |
706457b7 | 16 | #include "cms_local.h" |
8931b30d | 17 | |
8931b30d DSH |
18 | /* CMS DigestedData Utilities */ |
19 | ||
c1669f41 SL |
20 | CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md, |
21 | OPENSSL_CTX *libctx, const char *propq) | |
0f113f3e MC |
22 | { |
23 | CMS_ContentInfo *cms; | |
24 | CMS_DigestedData *dd; | |
c1669f41 | 25 | |
d8652be0 | 26 | cms = CMS_ContentInfo_new_ex(libctx, propq); |
90945fa3 | 27 | if (cms == NULL) |
0f113f3e | 28 | return NULL; |
8931b30d | 29 | |
0f113f3e | 30 | dd = M_ASN1_new_of(CMS_DigestedData); |
8931b30d | 31 | |
90945fa3 | 32 | if (dd == NULL) |
0f113f3e | 33 | goto err; |
8931b30d | 34 | |
0f113f3e MC |
35 | cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); |
36 | cms->d.digestedData = dd; | |
8931b30d | 37 | |
0f113f3e MC |
38 | dd->version = 0; |
39 | dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); | |
8931b30d | 40 | |
0f113f3e | 41 | X509_ALGOR_set_md(dd->digestAlgorithm, md); |
8931b30d | 42 | |
0f113f3e | 43 | return cms; |
8931b30d | 44 | |
0f113f3e | 45 | err: |
25aaa98a | 46 | CMS_ContentInfo_free(cms); |
0f113f3e MC |
47 | return NULL; |
48 | } | |
8931b30d | 49 | |
9fdcc21f | 50 | BIO *cms_DigestedData_init_bio(const CMS_ContentInfo *cms) |
0f113f3e | 51 | { |
c1669f41 SL |
52 | CMS_DigestedData *dd = cms->d.digestedData; |
53 | ||
54 | return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm, cms_get0_cmsctx(cms)); | |
0f113f3e | 55 | } |
8931b30d | 56 | |
9fdcc21f | 57 | int cms_DigestedData_do_final(const CMS_ContentInfo *cms, BIO *chain, int verify) |
0f113f3e | 58 | { |
bfb0641f | 59 | EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
0f113f3e MC |
60 | unsigned char md[EVP_MAX_MD_SIZE]; |
61 | unsigned int mdlen; | |
62 | int r = 0; | |
63 | CMS_DigestedData *dd; | |
6e59a892 RL |
64 | |
65 | if (mctx == NULL) { | |
66 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, ERR_R_MALLOC_FAILURE); | |
67 | goto err; | |
68 | } | |
0f113f3e MC |
69 | |
70 | dd = cms->d.digestedData; | |
71 | ||
6e59a892 | 72 | if (!cms_DigestAlgorithm_find_ctx(mctx, chain, dd->digestAlgorithm)) |
0f113f3e MC |
73 | goto err; |
74 | ||
6e59a892 | 75 | if (EVP_DigestFinal_ex(mctx, md, &mdlen) <= 0) |
0f113f3e MC |
76 | goto err; |
77 | ||
78 | if (verify) { | |
79 | if (mdlen != (unsigned int)dd->digest->length) { | |
80 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, | |
81 | CMS_R_MESSAGEDIGEST_WRONG_LENGTH); | |
82 | goto err; | |
83 | } | |
84 | ||
85 | if (memcmp(md, dd->digest->data, mdlen)) | |
86 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, | |
87 | CMS_R_VERIFICATION_FAILURE); | |
88 | else | |
89 | r = 1; | |
90 | } else { | |
91 | if (!ASN1_STRING_set(dd->digest, md, mdlen)) | |
92 | goto err; | |
93 | r = 1; | |
94 | } | |
95 | ||
96 | err: | |
bfb0641f | 97 | EVP_MD_CTX_free(mctx); |
0f113f3e MC |
98 | |
99 | return r; | |
100 | ||
101 | } |