1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/asn1.h>
58
59#include <string.h>
60#include <time.h>
61
62#include <openssl/asn1t.h>
63#include <openssl/buf.h>
64#include <openssl/err.h>
65#include <openssl/mem.h>
66
67#include "asn1_locl.h"
68
69/*
70 * This is an implementation of the ASN1 Time structure which is: Time ::=
71 * CHOICE { utcTime UTCTime, generalTime GeneralizedTime } written by Steve
72 * Henson.
73 */
74
75IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
76
77IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
78
79ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
80{
81 return ASN1_TIME_adj(s, t, 0, 0);
82}
83
84ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
85 int offset_day, long offset_sec)
86{
87 struct tm *ts;
88 struct tm data;
89
90 ts = OPENSSL_gmtime(&t, &data);
91 if (ts == NULL) {
92 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ERROR_GETTING_TIME);
93 return NULL;
94 }
95 if (offset_day || offset_sec) {
96 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
97 return NULL;
98 }
99 if ((ts->tm_year >= 50) && (ts->tm_year < 150))
100 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
101 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
102}
103
104int ASN1_TIME_check(ASN1_TIME *t)
105{
106 if (t->type == V_ASN1_GENERALIZEDTIME)
107 return ASN1_GENERALIZEDTIME_check(t);
108 else if (t->type == V_ASN1_UTCTIME)
109 return ASN1_UTCTIME_check(t);
110 return 0;
111}
112
113/* Convert an ASN1_TIME structure to GeneralizedTime */
114ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
115 ASN1_GENERALIZEDTIME **out)
116{
117 ASN1_GENERALIZEDTIME *ret = NULL;
118 char *str;
119 int newlen;
120
121 if (!ASN1_TIME_check(t))
122 return NULL;
123
124 if (!out || !*out) {
125 if (!(ret = ASN1_GENERALIZEDTIME_new()))
126 goto err;
127 } else {
128 ret = *out;
129 }
130
131 /* If already GeneralizedTime just copy across */
132 if (t->type == V_ASN1_GENERALIZEDTIME) {
133 if (!ASN1_STRING_set(ret, t->data, t->length))
134 goto err;
135 goto done;
136 }
137
138 /* grow the string */
139 if (!ASN1_STRING_set(ret, NULL, t->length + 2))
140 goto err;
141 /* ASN1_STRING_set() allocated 'len + 1' bytes. */
142 newlen = t->length + 2 + 1;
143 str = (char *)ret->data;
144 /* Work out the century and prepend */
145 if (t->data[0] >= '5')
146 BUF_strlcpy(str, "19", newlen);
147 else
148 BUF_strlcpy(str, "20", newlen);
149
150 BUF_strlcat(str, (char *)t->data, newlen);
151
152 done:
153 if (out != NULL && *out == NULL)
154 *out = ret;
155 return ret;
156
157 err:
158 if (out == NULL || *out != ret)
159 ASN1_GENERALIZEDTIME_free(ret);
160 return NULL;
161}
162
163
164int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
165{
166 ASN1_TIME t;
167
168 t.length = strlen(str);
169 t.data = (unsigned char *)str;
170 t.flags = 0;
171
172 t.type = V_ASN1_UTCTIME;
173
174 if (!ASN1_TIME_check(&t)) {
175 t.type = V_ASN1_GENERALIZEDTIME;
176 if (!ASN1_TIME_check(&t))
177 return 0;
178 }
179
180 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
181 return 0;
182
183 return 1;
184}
185
186static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
187{
188 if (t == NULL) {
189 time_t now_t;
190 time(&now_t);
191 if (OPENSSL_gmtime(&now_t, tm))
192 return 1;
193 return 0;
194 }
195
196 if (t->type == V_ASN1_UTCTIME)
197 return asn1_utctime_to_tm(tm, t);
198 else if (t->type == V_ASN1_GENERALIZEDTIME)
199 return asn1_generalizedtime_to_tm(tm, t);
200
201 return 0;
202}
203
204int ASN1_TIME_diff(int *pday, int *psec,
205 const ASN1_TIME *from, const ASN1_TIME *to)
206{
207 struct tm tm_from, tm_to;
208 if (!asn1_time_to_tm(&tm_from, from))
209 return 0;
210 if (!asn1_time_to_tm(&tm_to, to))
211 return 0;
212 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
213}
214