a_time.c revision 296341 
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,
88                     (len >= sizeof tmp) ? sizeof tmp : len);
89        tmpstr.data = tmp;
90        a = (ASN1_GENERALIZEDTIME *)&tmpstr;
91    }
92# endif
93    if (a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
94        return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
95                               a->type, V_ASN1_UNIVERSAL));
96    ASN1err(ASN1_F_I2D_ASN1_TIME, ASN1_R_EXPECTING_A_TIME);
97    return -1;
98}
99#endif
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        ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
115        return NULL;
116    }
117    if (offset_day || offset_sec) {
118        if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
119            return NULL;
120    }
121    if ((ts->tm_year >= 50) && (ts->tm_year < 150))
122        return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
123    return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
124}
125
126int ASN1_TIME_check(ASN1_TIME *t)
127{
128    if (t->type == V_ASN1_GENERALIZEDTIME)
129        return ASN1_GENERALIZEDTIME_check(t);
130    else if (t->type == V_ASN1_UTCTIME)
131        return ASN1_UTCTIME_check(t);
132    return 0;
133}
134
135/* Convert an ASN1_TIME structure to GeneralizedTime */
136ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
137                                                   ASN1_GENERALIZEDTIME **out)
138{
139    ASN1_GENERALIZEDTIME *ret;
140    char *str;
141    int newlen;
142
143    if (!ASN1_TIME_check(t))
144        return NULL;
145
146    if (!out || !*out) {
147        if (!(ret = ASN1_GENERALIZEDTIME_new()))
148            return NULL;
149        if (out)
150            *out = ret;
151    } else
152        ret = *out;
153
154    /* If already GeneralizedTime just copy across */
155    if (t->type == V_ASN1_GENERALIZEDTIME) {
156        if (!ASN1_STRING_set(ret, t->data, t->length))
157            return NULL;
158        return ret;
159    }
160
161    /* grow the string */
162    if (!ASN1_STRING_set(ret, NULL, t->length + 2))
163        return NULL;
164    /* ASN1_STRING_set() allocated 'len + 1' bytes. */
165    newlen = t->length + 2 + 1;
166    str = (char *)ret->data;
167    /* Work out the century and prepend */
168    if (t->data[0] >= '5')
169        BUF_strlcpy(str, "19", newlen);
170    else
171        BUF_strlcpy(str, "20", newlen);
172
173    BUF_strlcat(str, (char *)t->data, newlen);
174
175    return ret;
176}
177
178int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
179{
180    ASN1_TIME t;
181
182    t.length = strlen(str);
183    t.data = (unsigned char *)str;
184    t.flags = 0;
185
186    t.type = V_ASN1_UTCTIME;
187
188    if (!ASN1_TIME_check(&t)) {
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