a_gentm.c revision 296341 
1/* crypto/asn1/a_gentm.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/*
60 * GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME
61 */
62
63#include <stdio.h>
64#include <time.h>
65#include "cryptlib.h"
66#include "o_time.h"
67#include <openssl/asn1.h>
68
69#if 0
70
71int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
72{
73# ifdef CHARSET_EBCDIC
74    /* KLUDGE! We convert to ascii before writing DER */
75    int len;
76    char tmp[24];
77    ASN1_STRING tmpstr = *(ASN1_STRING *)a;
78
79    len = tmpstr.length;
80    ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
81    tmpstr.data = tmp;
82
83    a = (ASN1_GENERALIZEDTIME *)&tmpstr;
84# endif
85    return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
86                           V_ASN1_GENERALIZEDTIME, V_ASN1_UNIVERSAL));
87}
88
89ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
90                                               unsigned char **pp,
91                                               long length)
92{
93    ASN1_GENERALIZEDTIME *ret = NULL;
94
95    ret =
96        (ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
97                                               V_ASN1_GENERALIZEDTIME,
98                                               V_ASN1_UNIVERSAL);
99    if (ret == NULL) {
100        ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ERR_R_NESTED_ASN1_ERROR);
101        return (NULL);
102    }
103# ifdef CHARSET_EBCDIC
104    ascii2ebcdic(ret->data, ret->data, ret->length);
105# endif
106    if (!ASN1_GENERALIZEDTIME_check(ret)) {
107        ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ASN1_R_INVALID_TIME_FORMAT);
108        goto err;
109    }
110
111    return (ret);
112 err:
113    if ((ret != NULL) && ((a == NULL) || (*a != ret)))
114        M_ASN1_GENERALIZEDTIME_free(ret);
115    return (NULL);
116}
117
118#endif
119
120int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d)
121{
122    static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
123    static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
124    char *a;
125    int n, i, l, o;
126
127    if (d->type != V_ASN1_GENERALIZEDTIME)
128        return (0);
129    l = d->length;
130    a = (char *)d->data;
131    o = 0;
132    /*
133     * GENERALIZEDTIME is similar to UTCTIME except the year is represented
134     * as YYYY. This stuff treats everything as a two digit field so make
135     * first two fields 00 to 99
136     */
137    if (l < 13)
138        goto err;
139    for (i = 0; i < 7; i++) {
140        if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
141            i++;
142            break;
143        }
144        if ((a[o] < '0') || (a[o] > '9'))
145            goto err;
146        n = a[o] - '0';
147        if (++o > l)
148            goto err;
149
150        if ((a[o] < '0') || (a[o] > '9'))
151            goto err;
152        n = (n * 10) + a[o] - '0';
153        if (++o > l)
154            goto err;
155
156        if ((n < min[i]) || (n > max[i]))
157            goto err;
158    }
159    /*
160     * Optional fractional seconds: decimal point followed by one or more
161     * digits.
162     */
163    if (a[o] == '.') {
164        if (++o > l)
165            goto err;
166        i = o;
167        while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
168            o++;
169        /* Must have at least one digit after decimal point */
170        if (i == o)
171            goto err;
172    }
173
174    if (a[o] == 'Z')
175        o++;
176    else if ((a[o] == '+') || (a[o] == '-')) {
177        o++;
178        if (o + 4 > l)
179            goto err;
180        for (i = 7; i < 9; i++) {
181            if ((a[o] < '0') || (a[o] > '9'))
182                goto err;
183            n = a[o] - '0';
184            o++;
185            if ((a[o] < '0') || (a[o] > '9'))
186                goto err;
187            n = (n * 10) + a[o] - '0';
188            if ((n < min[i]) || (n > max[i]))
189                goto err;
190            o++;
191        }
192    } else {
193        /* Missing time zone information. */
194        goto err;
195    }
196    return (o == l);
197 err:
198    return (0);
199}
200
201int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
202{
203    ASN1_GENERALIZEDTIME t;
204
205    t.type = V_ASN1_GENERALIZEDTIME;
206    t.length = strlen(str);
207    t.data = (unsigned char *)str;
208    if (ASN1_GENERALIZEDTIME_check(&t)) {
209        if (s != NULL) {
210            if (!ASN1_STRING_set((ASN1_STRING *)s,
211                                 (unsigned char *)str, t.length))
212                return 0;
213            s->type = V_ASN1_GENERALIZEDTIME;
214        }
215        return (1);
216    } else
217        return (0);
218}
219
220ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
221                                               time_t t)
222{
223    return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
224}
225
226ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
227                                               time_t t, int offset_day,
228                                               long offset_sec)
229{
230    char *p;
231    struct tm *ts;
232    struct tm data;
233    size_t len = 20;
234
235    if (s == NULL)
236        s = M_ASN1_GENERALIZEDTIME_new();
237    if (s == NULL)
238        return (NULL);
239
240    ts = OPENSSL_gmtime(&t, &data);
241    if (ts == NULL)
242        return (NULL);
243
244    if (offset_day || offset_sec) {
245        if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
246            return NULL;
247    }
248
249    p = (char *)s->data;
250    if ((p == NULL) || ((size_t)s->length < len)) {
251        p = OPENSSL_malloc(len);
252        if (p == NULL) {
253            ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
254            return (NULL);
255        }
256        if (s->data != NULL)
257            OPENSSL_free(s->data);
258        s->data = (unsigned char *)p;
259    }
260
261    BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
262                 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
263                 ts->tm_sec);
264    s->length = strlen(p);
265    s->type = V_ASN1_GENERALIZEDTIME;
266#ifdef CHARSET_EBCDIC_not
267    ebcdic2ascii(s->data, s->data, s->length);
268#endif
269    return (s);
270}
271