ct_policy.c revision 1.4 
1/*	$OpenBSD: ct_policy.c,v 1.4 2021/12/05 09:37:46 tb Exp $ */
2/*
3 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 *
5 * Licensed under the OpenSSL license (the "License").  You may not use
6 * this file except in compliance with the License.  You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11#ifdef OPENSSL_NO_CT
12# error "CT is disabled"
13#endif
14
15#include <openssl/ct.h>
16#include <openssl/err.h>
17#include <time.h>
18
19#include "ct_local.h"
20
21/*
22 * Number of seconds in the future that an SCT timestamp can be, by default,
23 * without being considered invalid. This is added to time() when setting a
24 * default value for CT_POLICY_EVAL_CTX.epoch_time_in_ms.
25 * It can be overridden by calling CT_POLICY_EVAL_CTX_set_time().
26 */
27static const time_t SCT_CLOCK_DRIFT_TOLERANCE = 300;
28
29CT_POLICY_EVAL_CTX *
30CT_POLICY_EVAL_CTX_new(void)
31{
32	CT_POLICY_EVAL_CTX *ctx = calloc(1, sizeof(CT_POLICY_EVAL_CTX));
33
34	if (ctx == NULL) {
35		CTerror(ERR_R_MALLOC_FAILURE);
36		return NULL;
37	}
38
39	/* time(NULL) shouldn't ever fail, so don't bother checking for -1. */
40	ctx->epoch_time_in_ms = (uint64_t)(time(NULL) + SCT_CLOCK_DRIFT_TOLERANCE) *
41            1000;
42
43	return ctx;
44}
45
46void
47CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx)
48{
49	if (ctx == NULL)
50		return;
51	X509_free(ctx->cert);
52	X509_free(ctx->issuer);
53	free(ctx);
54}
55
56int
57CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert)
58{
59	if (!X509_up_ref(cert))
60		return 0;
61	ctx->cert = cert;
62	return 1;
63}
64
65int
66CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer)
67{
68	if (!X509_up_ref(issuer))
69		return 0;
70	ctx->issuer = issuer;
71	return 1;
72}
73
74void
75CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx,
76    CTLOG_STORE *log_store)
77{
78	ctx->log_store = log_store;
79}
80
81void
82CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms)
83{
84	ctx->epoch_time_in_ms = time_in_ms;
85}
86
87X509 *
88CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx)
89{
90	return ctx->cert;
91}
92
93X509 *
94CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx)
95{
96	return ctx->issuer;
97}
98
99const CTLOG_STORE *
100CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx)
101{
102	return ctx->log_store;
103}
104
105uint64_t
106CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx)
107{
108	return ctx->epoch_time_in_ms;
109}
110