a_time.c revision 296465 
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    struct tm *ts;
104    struct tm data;
105
106    ts = OPENSSL_gmtime(&t, &data);
107    if (ts == NULL) {
108        ASN1err(ASN1_F_ASN1_TIME_SET, ASN1_R_ERROR_GETTING_TIME);
109        return NULL;
110    }
111    if ((ts->tm_year >= 50) && (ts->tm_year < 150))
112        return ASN1_UTCTIME_set(s, t);
113    return ASN1_GENERALIZEDTIME_set(s, t);
114}
115
116int ASN1_TIME_check(ASN1_TIME *t)
117{
118    if (t->type == V_ASN1_GENERALIZEDTIME)
119        return ASN1_GENERALIZEDTIME_check(t);
120    else if (t->type == V_ASN1_UTCTIME)
121        return ASN1_UTCTIME_check(t);
122    return 0;
123}
124
125/* Convert an ASN1_TIME structure to GeneralizedTime */
126ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
127                                                   ASN1_GENERALIZEDTIME **out)
128{
129    ASN1_GENERALIZEDTIME *ret;
130    char *str;
131    int newlen;
132
133    if (!ASN1_TIME_check(t))
134        return NULL;
135
136    if (!out || !*out) {
137        if (!(ret = ASN1_GENERALIZEDTIME_new()))
138            return NULL;
139        if (out)
140            *out = ret;
141    } else
142        ret = *out;
143
144    /* If already GeneralizedTime just copy across */
145    if (t->type == V_ASN1_GENERALIZEDTIME) {
146        if (!ASN1_STRING_set(ret, t->data, t->length))
147            return NULL;
148        return ret;
149    }
150
151    /* grow the string */
152    if (!ASN1_STRING_set(ret, NULL, t->length + 2))
153        return NULL;
154    /* ASN1_STRING_set() allocated 'len + 1' bytes. */
155    newlen = t->length + 2 + 1;
156    str = (char *)ret->data;
157    /* Work out the century and prepend */
158    if (t->data[0] >= '5')
159        BUF_strlcpy(str, "19", newlen);
160    else
161        BUF_strlcpy(str, "20", newlen);
162
163    BUF_strlcat(str, (char *)t->data, newlen);
164
165    return ret;
166}
167