2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
11 * This is an implementation of the ASN1 Time structure which is:
14 * generalTime GeneralizedTime }
19 #include "internal/cryptlib.h"
20 #include <openssl/asn1t.h>
21 #include "asn1_locl.h"
23 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
25 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
27 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
29 return ASN1_TIME_adj(s, t, 0, 0);
32 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
33 int offset_day, long offset_sec)
38 ts = OPENSSL_gmtime(&t, &data);
40 ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
43 if (offset_day || offset_sec) {
44 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
47 if ((ts->tm_year >= 50) && (ts->tm_year < 150))
48 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
49 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
52 int ASN1_TIME_check(const ASN1_TIME *t)
54 if (t->type == V_ASN1_GENERALIZEDTIME)
55 return ASN1_GENERALIZEDTIME_check(t);
56 else if (t->type == V_ASN1_UTCTIME)
57 return ASN1_UTCTIME_check(t);
61 /* Convert an ASN1_TIME structure to GeneralizedTime */
62 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
63 ASN1_GENERALIZEDTIME **out)
65 ASN1_GENERALIZEDTIME *ret;
69 if (!ASN1_TIME_check(t))
72 if (out == NULL || *out == NULL) {
73 if ((ret = ASN1_GENERALIZEDTIME_new()) == NULL)
80 /* If already GeneralizedTime just copy across */
81 if (t->type == V_ASN1_GENERALIZEDTIME) {
82 if (!ASN1_STRING_set(ret, t->data, t->length))
88 if (!ASN1_STRING_set(ret, NULL, t->length + 2))
90 /* ASN1_STRING_set() allocated 'len + 1' bytes. */
91 newlen = t->length + 2 + 1;
92 str = (char *)ret->data;
93 /* Work out the century and prepend */
94 if (t->data[0] >= '5')
95 OPENSSL_strlcpy(str, "19", newlen);
97 OPENSSL_strlcpy(str, "20", newlen);
99 OPENSSL_strlcat(str, (char *)t->data, newlen);
104 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
108 t.length = strlen(str);
109 t.data = (unsigned char *)str;
112 t.type = V_ASN1_UTCTIME;
114 if (!ASN1_TIME_check(&t)) {
115 t.type = V_ASN1_GENERALIZEDTIME;
116 if (!ASN1_TIME_check(&t))
120 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
126 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
131 if (OPENSSL_gmtime(&now_t, tm))
136 if (t->type == V_ASN1_UTCTIME)
137 return asn1_utctime_to_tm(tm, t);
138 else if (t->type == V_ASN1_GENERALIZEDTIME)
139 return asn1_generalizedtime_to_tm(tm, t);
144 int ASN1_TIME_diff(int *pday, int *psec,
145 const ASN1_TIME *from, const ASN1_TIME *to)
147 struct tm tm_from, tm_to;
148 if (!asn1_time_to_tm(&tm_from, from))
150 if (!asn1_time_to_tm(&tm_to, to))
152 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
155 int ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
157 if (tm->type == V_ASN1_UTCTIME)
158 return ASN1_UTCTIME_print(bp, tm);
159 if (tm->type == V_ASN1_GENERALIZEDTIME)
160 return ASN1_GENERALIZEDTIME_print(bp, tm);
161 BIO_write(bp, "Bad time value", 14);