1/*
2 * Copyright 1995-2021 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#include <stdio.h>
11#include <time.h>
12#include "internal/cryptlib.h"
13#include <openssl/asn1.h>
14#include "asn1_local.h"
15#include <openssl/asn1t.h>
16
17IMPLEMENT_ASN1_DUP_FUNCTION(ASN1_UTCTIME)
18
19/* This is the primary function used to parse ASN1_UTCTIME */
20int ossl_asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
21{
22    /* wrapper around ossl_asn1_time_to_tm */
23    if (d->type != V_ASN1_UTCTIME)
24        return 0;
25    return ossl_asn1_time_to_tm(tm, d);
26}
27
28int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
29{
30    return ossl_asn1_utctime_to_tm(NULL, d);
31}
32
33/* Sets the string via simple copy without cleaning it up */
34int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
35{
36    ASN1_UTCTIME t;
37
38    t.type = V_ASN1_UTCTIME;
39    t.length = strlen(str);
40    t.data = (unsigned char *)str;
41    t.flags = 0;
42
43    if (!ASN1_UTCTIME_check(&t))
44        return 0;
45
46    if (s != NULL && !ASN1_STRING_copy(s, &t))
47        return 0;
48
49    return 1;
50}
51
52ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
53{
54    return ASN1_UTCTIME_adj(s, t, 0, 0);
55}
56
57ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
58                               int offset_day, long offset_sec)
59{
60    struct tm *ts;
61    struct tm data;
62
63    ts = OPENSSL_gmtime(&t, &data);
64    if (ts == NULL)
65        return NULL;
66
67    if (offset_day || offset_sec) {
68        if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
69            return NULL;
70    }
71
72    return ossl_asn1_time_from_tm(s, ts, V_ASN1_UTCTIME);
73}
74
75int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
76{
77    struct tm stm, ttm;
78    int day, sec;
79
80    if (!ossl_asn1_utctime_to_tm(&stm, s))
81        return -2;
82
83    if (OPENSSL_gmtime(&t, &ttm) == NULL)
84        return -2;
85
86    if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
87        return -2;
88
89    if (day > 0 || sec > 0)
90        return 1;
91    if (day < 0 || sec < 0)
92        return -1;
93    return 0;
94}
95
96int ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
97{
98    if (tm->type != V_ASN1_UTCTIME)
99        return 0;
100    return ASN1_TIME_print(bp, tm);
101}
102