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-rw-r--r--src/lib/libcrypto/ct/ct_policy.c163
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diff --git a/src/lib/libcrypto/ct/ct_policy.c b/src/lib/libcrypto/ct/ct_policy.c
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1/* $OpenBSD: ct_policy.c,v 1.6 2023/07/08 07:22:58 beck Exp $ */
2/*
3 * Implementations of Certificate Transparency SCT policies.
4 * Written by Rob Percival (robpercival@google.com) for the OpenSSL project.
5 */
6/* ====================================================================
7 * Copyright (c) 2016 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#ifdef OPENSSL_NO_CT
56# error "CT is disabled"
57#endif
58
59#include <openssl/ct.h>
60#include <openssl/err.h>
61#include <time.h>
62
63#include "ct_local.h"
64
65/*
66 * Number of seconds in the future that an SCT timestamp can be, by default,
67 * without being considered invalid. This is added to time() when setting a
68 * default value for CT_POLICY_EVAL_CTX.epoch_time_in_ms.
69 * It can be overridden by calling CT_POLICY_EVAL_CTX_set_time().
70 */
71static const time_t SCT_CLOCK_DRIFT_TOLERANCE = 300;
72
73CT_POLICY_EVAL_CTX *
74CT_POLICY_EVAL_CTX_new(void)
75{
76 CT_POLICY_EVAL_CTX *ctx = calloc(1, sizeof(CT_POLICY_EVAL_CTX));
77
78 if (ctx == NULL) {
79 CTerror(ERR_R_MALLOC_FAILURE);
80 return NULL;
81 }
82
83 /* time(NULL) shouldn't ever fail, so don't bother checking for -1. */
84 ctx->epoch_time_in_ms = (uint64_t)(time(NULL) + SCT_CLOCK_DRIFT_TOLERANCE) *
85 1000;
86
87 return ctx;
88}
89LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_new);
90
91void
92CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx)
93{
94 if (ctx == NULL)
95 return;
96 X509_free(ctx->cert);
97 X509_free(ctx->issuer);
98 free(ctx);
99}
100LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_free);
101
102int
103CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert)
104{
105 if (!X509_up_ref(cert))
106 return 0;
107 ctx->cert = cert;
108 return 1;
109}
110LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set1_cert);
111
112int
113CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer)
114{
115 if (!X509_up_ref(issuer))
116 return 0;
117 ctx->issuer = issuer;
118 return 1;
119}
120LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set1_issuer);
121
122void
123CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx,
124 CTLOG_STORE *log_store)
125{
126 ctx->log_store = log_store;
127}
128LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE);
129
130void
131CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms)
132{
133 ctx->epoch_time_in_ms = time_in_ms;
134}
135LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set_time);
136
137X509 *
138CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx)
139{
140 return ctx->cert;
141}
142LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_cert);
143
144X509 *
145CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx)
146{
147 return ctx->issuer;
148}
149LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_issuer);
150
151const CTLOG_STORE *
152CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx)
153{
154 return ctx->log_store;
155}
156LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_log_store);
157
158uint64_t
159CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx)
160{
161 return ctx->epoch_time_in_ms;
162}
163LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get_time);
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