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/err.h>
63#include <openssl/mem.h>
64
65#include "asn1_locl.h"
66
67int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
68{
69 static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
70 static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
71 char *a;
72 int n, i, l, o;
73
74 if (d->type != V_ASN1_GENERALIZEDTIME)
75 return (0);
76 l = d->length;
77 a = (char *)d->data;
78 o = 0;
79 /*
80 * GENERALIZEDTIME is similar to UTCTIME except the year is represented
81 * as YYYY. This stuff treats everything as a two digit field so make
82 * first two fields 00 to 99
83 */
84 if (l < 13)
85 goto err;
86 for (i = 0; i < 7; i++) {
87 if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
88 i++;
89 if (tm)
90 tm->tm_sec = 0;
91 break;
92 }
93 if ((a[o] < '0') || (a[o] > '9'))
94 goto err;
95 n = a[o] - '0';
96 if (++o > l)
97 goto err;
98
99 if ((a[o] < '0') || (a[o] > '9'))
100 goto err;
101 n = (n * 10) + a[o] - '0';
102 if (++o > l)
103 goto err;
104
105 if ((n < min[i]) || (n > max[i]))
106 goto err;
107 if (tm) {
108 switch (i) {
109 case 0:
110 tm->tm_year = n * 100 - 1900;
111 break;
112 case 1:
113 tm->tm_year += n;
114 break;
115 case 2:
116 tm->tm_mon = n - 1;
117 break;
118 case 3:
119 tm->tm_mday = n;
120 break;
121 case 4:
122 tm->tm_hour = n;
123 break;
124 case 5:
125 tm->tm_min = n;
126 break;
127 case 6:
128 tm->tm_sec = n;
129 break;
130 }
131 }
132 }
133 /*
134 * Optional fractional seconds: decimal point followed by one or more
135 * digits.
136 */
137 if (a[o] == '.') {
138 if (++o > l)
139 goto err;
140 i = o;
141 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
142 o++;
143 /* Must have at least one digit after decimal point */
144 if (i == o)
145 goto err;
146 }
147
148 if (a[o] == 'Z')
149 o++;
150 else if ((a[o] == '+') || (a[o] == '-')) {
151 int offsign = a[o] == '-' ? 1 : -1, offset = 0;
152 o++;
153 if (o + 4 > l)
154 goto err;
155 for (i = 7; i < 9; i++) {
156 if ((a[o] < '0') || (a[o] > '9'))
157 goto err;
158 n = a[o] - '0';
159 o++;
160 if ((a[o] < '0') || (a[o] > '9'))
161 goto err;
162 n = (n * 10) + a[o] - '0';
163 if ((n < min[i]) || (n > max[i]))
164 goto err;
165 if (tm) {
166 if (i == 7)
167 offset = n * 3600;
168 else if (i == 8)
169 offset += n * 60;
170 }
171 o++;
172 }
173 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
174 return 0;
175 } else if (a[o]) {
176 /* Missing time zone information. */
177 goto err;
178 }
179 return (o == l);
180 err:
181 return (0);
182}
183
184int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
185{
186 return asn1_generalizedtime_to_tm(NULL, d);
187}
188
189int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
190{
191 ASN1_GENERALIZEDTIME t;
192
193 t.type = V_ASN1_GENERALIZEDTIME;
194 t.length = strlen(str);
195 t.data = (unsigned char *)str;
196 if (ASN1_GENERALIZEDTIME_check(&t)) {
197 if (s != NULL) {
198 if (!ASN1_STRING_set((ASN1_STRING *)s,
199 (unsigned char *)str, t.length))
200 return 0;
201 s->type = V_ASN1_GENERALIZEDTIME;
202 }
203 return (1);
204 } else
205 return (0);
206}
207
208ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
209 time_t t)
210{
211 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
212}
213
214ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
215 time_t t, int offset_day,
216 long offset_sec)
217{
218 char *p;
219 struct tm *ts;
220 struct tm data;
221 size_t len = 20;
222 ASN1_GENERALIZEDTIME *tmps = NULL;
223
224 if (s == NULL)
225 tmps = ASN1_GENERALIZEDTIME_new();
226 else
227 tmps = s;
228 if (tmps == NULL)
229 return NULL;
230
231 ts = OPENSSL_gmtime(&t, &data);
232 if (ts == NULL)
233 goto err;
234
235 if (offset_day || offset_sec) {
236 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
237 goto err;
238 }
239
240 p = (char *)tmps->data;
241 if ((p == NULL) || ((size_t)tmps->length < len)) {
242 p = OPENSSL_malloc(len);
243 if (p == NULL) {
244 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
245 goto err;
246 }
247 OPENSSL_free(tmps->data);
248 tmps->data = (unsigned char *)p;
249 }
250
251 BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
252 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
253 ts->tm_sec);
254 tmps->length = strlen(p);
255 tmps->type = V_ASN1_GENERALIZEDTIME;
256 return tmps;
257 err:
258 if (s == NULL)
259 ASN1_GENERALIZEDTIME_free(tmps);
260 return NULL;
261}
262