1/* crypto/asn1/a_time.c */
2/* ====================================================================
3 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in
14 *    the documentation and/or other materials provided with the
15 *    distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 *    software must display the following acknowledgment:
19 *    "This product includes software developed by the OpenSSL Project
20 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 *    endorse or promote products derived from this software without
24 *    prior written permission. For written permission, please contact
25 *    licensing@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 *    nor may "OpenSSL" appear in their names without prior written
29 *    permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 *    acknowledgment:
33 *    "This product includes software developed by the OpenSSL Project
34 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com).  This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
53 *
54 */
55
56
57/* This is an implementation of the ASN1 Time structure which is:
58 *    Time ::= CHOICE {
59 *      utcTime        UTCTime,
60 *      generalTime    GeneralizedTime }
61 * written by Steve Henson.
62 */
63
64#include <stdio.h>
65#include <time.h>
66#include "cryptlib.h"
67#include "o_time.h"
68#include <openssl/asn1t.h>
69
70IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
71
72IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
73
74#if 0
75int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
76	{
77#ifdef CHARSET_EBCDIC
78	/* KLUDGE! We convert to ascii before writing DER */
79	char tmp[24];
80	ASN1_STRING tmpstr;
81
82	if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) {
83	    int len;
84
85	    tmpstr = *(ASN1_STRING *)a;
86	    len = tmpstr.length;
87	    ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
88	    tmpstr.data = tmp;
89	    a = (ASN1_GENERALIZEDTIME *) &tmpstr;
90	}
91#endif
92	if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
93				return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
94				     a->type ,V_ASN1_UNIVERSAL));
95	ASN1err(ASN1_F_I2D_ASN1_TIME,ASN1_R_EXPECTING_A_TIME);
96	return -1;
97	}
98#endif
99
100
101ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
102	{
103	return ASN1_TIME_adj(s, t, 0, 0);
104	}
105
106ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
107				int offset_day, long offset_sec)
108	{
109	struct tm *ts;
110	struct tm data;
111
112	ts=OPENSSL_gmtime(&t,&data);
113	if (ts == NULL)
114		{
115		ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
116		return NULL;
117		}
118	if (offset_day || offset_sec)
119		{
120		if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
121			return NULL;
122		}
123	if((ts->tm_year >= 50) && (ts->tm_year < 150))
124			return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
125	return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
126	}
127
128int ASN1_TIME_check(ASN1_TIME *t)
129	{
130	if (t->type == V_ASN1_GENERALIZEDTIME)
131		return ASN1_GENERALIZEDTIME_check(t);
132	else if (t->type == V_ASN1_UTCTIME)
133		return ASN1_UTCTIME_check(t);
134	return 0;
135	}
136
137/* Convert an ASN1_TIME structure to GeneralizedTime */
138ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
139	{
140	ASN1_GENERALIZEDTIME *ret;
141	char *str;
142	int newlen;
143
144	if (!ASN1_TIME_check(t)) return NULL;
145
146	if (!out || !*out)
147		{
148		if (!(ret = ASN1_GENERALIZEDTIME_new ()))
149			return NULL;
150		if (out) *out = ret;
151		}
152	else ret = *out;
153
154	/* If already GeneralizedTime just copy across */
155	if (t->type == V_ASN1_GENERALIZEDTIME)
156		{
157		if(!ASN1_STRING_set(ret, t->data, t->length))
158			return NULL;
159		return ret;
160		}
161
162	/* grow the string */
163	if (!ASN1_STRING_set(ret, NULL, t->length + 2))
164		return NULL;
165	/* ASN1_STRING_set() allocated 'len + 1' bytes. */
166	newlen = t->length + 2 + 1;
167	str = (char *)ret->data;
168	/* Work out the century and prepend */
169	if (t->data[0] >= '5') BUF_strlcpy(str, "19", newlen);
170	else BUF_strlcpy(str, "20", newlen);
171
172	BUF_strlcat(str, (char *)t->data, newlen);
173
174	return ret;
175	}
176
177int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
178	{
179	ASN1_TIME t;
180
181	t.length = strlen(str);
182	t.data = (unsigned char *)str;
183	t.flags = 0;
184
185	t.type = V_ASN1_UTCTIME;
186
187	if (!ASN1_TIME_check(&t))
188		{
189		t.type = V_ASN1_GENERALIZEDTIME;
190		if (!ASN1_TIME_check(&t))
191			return 0;
192		}
193
194	if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
195			return 0;
196
197	return 1;
198	}
199