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Diffstat (limited to 'src/lib/libcrypto/ct/ct_vfy.c')
-rw-r--r--src/lib/libcrypto/ct/ct_vfy.c195
1 files changed, 0 insertions, 195 deletions
diff --git a/src/lib/libcrypto/ct/ct_vfy.c b/src/lib/libcrypto/ct/ct_vfy.c
deleted file mode 100644
index 424117263a..0000000000
--- a/src/lib/libcrypto/ct/ct_vfy.c
+++ /dev/null
@@ -1,195 +0,0 @@
1/* $OpenBSD: ct_vfy.c,v 1.6 2022/01/06 14:34:40 jsing Exp $ */
2/*
3 * Written by Rob Stradling (rob@comodo.com) and Stephen Henson
4 * (steve@openssl.org) for the OpenSSL project 2014.
5 */
6/* ====================================================================
7 * Copyright (c) 2014 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 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <string.h>
61
62#include <openssl/ct.h>
63#include <openssl/err.h>
64#include <openssl/evp.h>
65#include <openssl/x509.h>
66
67#include "ct_local.h"
68
69typedef enum sct_signature_type_t {
70 SIGNATURE_TYPE_NOT_SET = -1,
71 SIGNATURE_TYPE_CERT_TIMESTAMP,
72 SIGNATURE_TYPE_TREE_HASH
73} SCT_SIGNATURE_TYPE;
74
75/*
76 * Update encoding for SCT signature verification/generation to supplied
77 * EVP_MD_CTX.
78 */
79static int
80sct_ctx_update(EVP_MD_CTX *ctx, const SCT_CTX *sctx, const SCT *sct)
81{
82 CBB cbb, entry, extensions;
83 uint8_t *data = NULL;
84 size_t data_len;
85 int ret = 0;
86
87 memset(&cbb, 0, sizeof(cbb));
88
89 if (sct->entry_type == CT_LOG_ENTRY_TYPE_NOT_SET)
90 goto err;
91 if (sct->entry_type == CT_LOG_ENTRY_TYPE_PRECERT && sctx->ihash == NULL)
92 goto err;
93
94 if (!CBB_init(&cbb, 0))
95 goto err;
96
97 /*
98 * Build the digitally-signed struct per RFC 6962 section 3.2.
99 */
100 if (!CBB_add_u8(&cbb, sct->version))
101 goto err;
102 if (!CBB_add_u8(&cbb, SIGNATURE_TYPE_CERT_TIMESTAMP))
103 goto err;
104 if (!CBB_add_u64(&cbb, sct->timestamp))
105 goto err;
106 if (!CBB_add_u16(&cbb, sct->entry_type))
107 goto err;
108
109 if (sct->entry_type == CT_LOG_ENTRY_TYPE_PRECERT) {
110 if (!CBB_add_bytes(&cbb, sctx->ihash, sctx->ihashlen))
111 goto err;
112 }
113
114 if (!CBB_add_u24_length_prefixed(&cbb, &entry))
115 goto err;
116 if (sct->entry_type == CT_LOG_ENTRY_TYPE_PRECERT) {
117 if (sctx->preder == NULL)
118 goto err;
119 if (!CBB_add_bytes(&entry, sctx->preder, sctx->prederlen))
120 goto err;
121 } else {
122 if (sctx->certder == NULL)
123 goto err;
124 if (!CBB_add_bytes(&entry, sctx->certder, sctx->certderlen))
125 goto err;
126 }
127
128 if (!CBB_add_u16_length_prefixed(&cbb, &extensions))
129 goto err;
130 if (sct->ext_len > 0) {
131 if (!CBB_add_bytes(&extensions, sct->ext, sct->ext_len))
132 goto err;
133 }
134
135 if (!CBB_finish(&cbb, &data, &data_len))
136 goto err;
137
138 if (!EVP_DigestUpdate(ctx, data, data_len))
139 goto err;
140
141 ret = 1;
142
143 err:
144 CBB_cleanup(&cbb);
145 free(data);
146
147 return ret;
148}
149
150int
151SCT_CTX_verify(const SCT_CTX *sctx, const SCT *sct)
152{
153 EVP_MD_CTX *ctx = NULL;
154 int ret = 0;
155
156 if (!SCT_is_complete(sct) || sctx->pkey == NULL ||
157 sct->entry_type == CT_LOG_ENTRY_TYPE_NOT_SET ||
158 (sct->entry_type == CT_LOG_ENTRY_TYPE_PRECERT &&
159 sctx->ihash == NULL)) {
160 CTerror(CT_R_SCT_NOT_SET);
161 return 0;
162 }
163 if (sct->version != SCT_VERSION_V1) {
164 CTerror(CT_R_SCT_UNSUPPORTED_VERSION);
165 return 0;
166 }
167 if (sct->log_id_len != sctx->pkeyhashlen ||
168 memcmp(sct->log_id, sctx->pkeyhash, sctx->pkeyhashlen) != 0) {
169 CTerror(CT_R_SCT_LOG_ID_MISMATCH);
170 return 0;
171 }
172 if (sct->timestamp > sctx->epoch_time_in_ms) {
173 CTerror(CT_R_SCT_FUTURE_TIMESTAMP);
174 return 0;
175 }
176
177 if ((ctx = EVP_MD_CTX_new()) == NULL)
178 goto end;
179
180 if (!EVP_DigestVerifyInit(ctx, NULL, EVP_sha256(), NULL, sctx->pkey))
181 goto end;
182
183 if (!sct_ctx_update(ctx, sctx, sct))
184 goto end;
185
186 /* Verify signature */
187 /* If ret < 0 some other error: fall through without setting error */
188 if ((ret = EVP_DigestVerifyFinal(ctx, sct->sig, sct->sig_len)) == 0)
189 CTerror(CT_R_SCT_INVALID_SIGNATURE);
190
191 end:
192 EVP_MD_CTX_free(ctx);
193
194 return ret;
195}
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