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/*
11 * GENERALIZEDTIME implementation. Based on UTCTIME
12 */
13
14#include <stdio.h>
15#include <time.h>
16#include "internal/cryptlib.h"
17#include <openssl/asn1.h>
18#include "asn1_local.h"
19#include <openssl/asn1t.h>
20
21IMPLEMENT_ASN1_DUP_FUNCTION(ASN1_GENERALIZEDTIME)
22
23/* This is the primary function used to parse ASN1_GENERALIZEDTIME */
24static int asn1_generalizedtime_to_tm(struct tm *tm,
25                                      const ASN1_GENERALIZEDTIME *d)
26{
27    /* wrapper around ossl_asn1_time_to_tm */
28    if (d->type != V_ASN1_GENERALIZEDTIME)
29        return 0;
30    return ossl_asn1_time_to_tm(tm, d);
31}
32
33int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
34{
35    return asn1_generalizedtime_to_tm(NULL, d);
36}
37
38int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
39{
40    ASN1_GENERALIZEDTIME t;
41
42    t.type = V_ASN1_GENERALIZEDTIME;
43    t.length = strlen(str);
44    t.data = (unsigned char *)str;
45    t.flags = 0;
46
47    if (!ASN1_GENERALIZEDTIME_check(&t))
48        return 0;
49
50    if (s != NULL && !ASN1_STRING_copy(s, &t))
51        return 0;
52
53    return 1;
54}
55
56ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
57                                               time_t t)
58{
59    return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
60}
61
62ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
63                                               time_t t, int offset_day,
64                                               long offset_sec)
65{
66    struct tm *ts;
67    struct tm data;
68
69    ts = OPENSSL_gmtime(&t, &data);
70    if (ts == NULL)
71        return NULL;
72
73    if (offset_day || offset_sec) {
74        if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
75            return NULL;
76    }
77
78    return ossl_asn1_time_from_tm(s, ts, V_ASN1_GENERALIZEDTIME);
79}
80
81int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
82{
83    if (tm->type != V_ASN1_GENERALIZEDTIME)
84        return 0;
85    return ASN1_TIME_print(bp, tm);
86}
87