xref: /openssl/crypto/asn1/a_utctm.c (revision 3c2bdd7d)
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 
IMPLEMENT_ASN1_DUP_FUNCTION(ASN1_UTCTIME)17 IMPLEMENT_ASN1_DUP_FUNCTION(ASN1_UTCTIME)
18 
19 /* This is the primary function used to parse ASN1_UTCTIME */
20 int 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 
ASN1_UTCTIME_check(const ASN1_UTCTIME * d)28 int 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 */
ASN1_UTCTIME_set_string(ASN1_UTCTIME * s,const char * str)34 int 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 
ASN1_UTCTIME_set(ASN1_UTCTIME * s,time_t t)52 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
53 {
54     return ASN1_UTCTIME_adj(s, t, 0, 0);
55 }
56 
ASN1_UTCTIME_adj(ASN1_UTCTIME * s,time_t t,int offset_day,long offset_sec)57 ASN1_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 
ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME * s,time_t t)75 int 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 
ASN1_UTCTIME_print(BIO * bp,const ASN1_UTCTIME * tm)96 int 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