xref: /third_party/openssl/crypto/ct/ct_policy.c (revision e1051a39) 
1/*
2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
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
8 */
9
10#ifdef OPENSSL_NO_CT
11# error "CT is disabled"
12#endif
13
14#include <openssl/ct.h>
15#include <openssl/err.h>
16#include <time.h>
17
18#include "ct_local.h"
19
20/*
21 * Number of seconds in the future that an SCT timestamp can be, by default,
22 * without being considered invalid. This is added to time() when setting a
23 * default value for CT_POLICY_EVAL_CTX.epoch_time_in_ms.
24 * It can be overridden by calling CT_POLICY_EVAL_CTX_set_time().
25 */
26static const time_t SCT_CLOCK_DRIFT_TOLERANCE = 300;
27
28CT_POLICY_EVAL_CTX *CT_POLICY_EVAL_CTX_new_ex(OSSL_LIB_CTX *libctx,
29                                              const char *propq)
30{
31    CT_POLICY_EVAL_CTX *ctx = OPENSSL_zalloc(sizeof(CT_POLICY_EVAL_CTX));
32
33    if (ctx == NULL) {
34        ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
35        return NULL;
36    }
37
38    ctx->libctx = libctx;
39    if (propq != NULL) {
40        ctx->propq = OPENSSL_strdup(propq);
41        if (ctx->propq == NULL) {
42            ERR_raise(ERR_LIB_CT, ERR_R_MALLOC_FAILURE);
43            OPENSSL_free(ctx);
44            return NULL;
45        }
46    }
47
48    /* time(NULL) shouldn't ever fail, so don't bother checking for -1. */
49    ctx->epoch_time_in_ms = (uint64_t)(time(NULL) + SCT_CLOCK_DRIFT_TOLERANCE) *
50            1000;
51
52    return ctx;
53}
54
55CT_POLICY_EVAL_CTX *CT_POLICY_EVAL_CTX_new(void)
56{
57    return CT_POLICY_EVAL_CTX_new_ex(NULL, NULL);
58}
59
60void CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx)
61{
62    if (ctx == NULL)
63        return;
64    X509_free(ctx->cert);
65    X509_free(ctx->issuer);
66    OPENSSL_free(ctx->propq);
67    OPENSSL_free(ctx);
68}
69
70int CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert)
71{
72    if (!X509_up_ref(cert))
73        return 0;
74    ctx->cert = cert;
75    return 1;
76}
77
78int CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer)
79{
80    if (!X509_up_ref(issuer))
81        return 0;
82    ctx->issuer = issuer;
83    return 1;
84}
85
86void CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx,
87                                               CTLOG_STORE *log_store)
88{
89    ctx->log_store = log_store;
90}
91
92void CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms)
93{
94    ctx->epoch_time_in_ms = time_in_ms;
95}
96
97X509* CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx)
98{
99    return ctx->cert;
100}
101
102X509* CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx)
103{
104    return ctx->issuer;
105}
106
107const CTLOG_STORE *CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx)
108{
109    return ctx->log_store;
110}
111
112uint64_t CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx)
113{
114    return ctx->epoch_time_in_ms;
115}
116