1 /* crypto/asn1/a_utctm.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 #include <stdio.h>
60 #include <time.h>
61 #include "cryptlib.h"
62 #include "o_time.h"
63 #include <openssl/asn1.h>
64
65 #if 0
66 int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
67 {
68 # ifndef CHARSET_EBCDIC
69 return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
70 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL));
71 # else
72 /* KLUDGE! We convert to ascii before writing DER */
73 int len;
74 char tmp[24];
75 ASN1_STRING x = *(ASN1_STRING *)a;
76
77 len = x.length;
78 ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len);
79 x.data = tmp;
80 return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
81 # endif
82 }
83
84 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
85 long length)
86 {
87 ASN1_UTCTIME *ret = NULL;
88
89 ret = (ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
90 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
91 if (ret == NULL) {
92 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ERR_R_NESTED_ASN1_ERROR);
93 return (NULL);
94 }
95 # ifdef CHARSET_EBCDIC
96 ascii2ebcdic(ret->data, ret->data, ret->length);
97 # endif
98 if (!ASN1_UTCTIME_check(ret)) {
99 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ASN1_R_INVALID_TIME_FORMAT);
100 goto err;
101 }
102
103 return (ret);
104 err:
105 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
106 M_ASN1_UTCTIME_free(ret);
107 return (NULL);
108 }
109
110 #endif
111
ASN1_UTCTIME_check(ASN1_UTCTIME * d)112 int ASN1_UTCTIME_check(ASN1_UTCTIME *d)
113 {
114 static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
115 static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
116 char *a;
117 int n, i, l, o;
118
119 if (d->type != V_ASN1_UTCTIME)
120 return (0);
121 l = d->length;
122 a = (char *)d->data;
123 o = 0;
124
125 if (l < 11)
126 goto err;
127 for (i = 0; i < 6; i++) {
128 if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
129 i++;
130 break;
131 }
132 if ((a[o] < '0') || (a[o] > '9'))
133 goto err;
134 n = a[o] - '0';
135 if (++o > l)
136 goto err;
137
138 if ((a[o] < '0') || (a[o] > '9'))
139 goto err;
140 n = (n * 10) + a[o] - '0';
141 if (++o > l)
142 goto err;
143
144 if ((n < min[i]) || (n > max[i]))
145 goto err;
146 }
147 if (a[o] == 'Z')
148 o++;
149 else if ((a[o] == '+') || (a[o] == '-')) {
150 o++;
151 if (o + 4 > l)
152 goto err;
153 for (i = 6; i < 8; i++) {
154 if ((a[o] < '0') || (a[o] > '9'))
155 goto err;
156 n = a[o] - '0';
157 o++;
158 if ((a[o] < '0') || (a[o] > '9'))
159 goto err;
160 n = (n * 10) + a[o] - '0';
161 if ((n < min[i]) || (n > max[i]))
162 goto err;
163 o++;
164 }
165 }
166 return (o == l);
167 err:
168 return (0);
169 }
170
ASN1_UTCTIME_set_string(ASN1_UTCTIME * s,const char * str)171 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
172 {
173 ASN1_UTCTIME t;
174
175 t.type = V_ASN1_UTCTIME;
176 t.length = strlen(str);
177 t.data = (unsigned char *)str;
178 if (ASN1_UTCTIME_check(&t)) {
179 if (s != NULL) {
180 if (!ASN1_STRING_set((ASN1_STRING *)s,
181 (unsigned char *)str, t.length))
182 return 0;
183 s->type = V_ASN1_UTCTIME;
184 }
185 return (1);
186 } else
187 return (0);
188 }
189
ASN1_UTCTIME_set(ASN1_UTCTIME * s,time_t t)190 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
191 {
192 return ASN1_UTCTIME_adj(s, t, 0, 0);
193 }
194
ASN1_UTCTIME_adj(ASN1_UTCTIME * s,time_t t,int offset_day,long offset_sec)195 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
196 int offset_day, long offset_sec)
197 {
198 char *p;
199 struct tm *ts;
200 struct tm data;
201 size_t len = 20;
202 int free_s = 0;
203
204 if (s == NULL) {
205 free_s = 1;
206 s = M_ASN1_UTCTIME_new();
207 }
208 if (s == NULL)
209 goto err;
210
211 ts = OPENSSL_gmtime(&t, &data);
212 if (ts == NULL)
213 goto err;
214
215 if (offset_day || offset_sec) {
216 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
217 goto err;
218 }
219
220 if ((ts->tm_year < 50) || (ts->tm_year >= 150))
221 goto err;
222
223 p = (char *)s->data;
224 if ((p == NULL) || ((size_t)s->length < len)) {
225 p = OPENSSL_malloc(len);
226 if (p == NULL) {
227 ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
228 goto err;
229 }
230 if (s->data != NULL)
231 OPENSSL_free(s->data);
232 s->data = (unsigned char *)p;
233 }
234
235 BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
236 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
237 ts->tm_sec);
238 s->length = strlen(p);
239 s->type = V_ASN1_UTCTIME;
240 #ifdef CHARSET_EBCDIC_not
241 ebcdic2ascii(s->data, s->data, s->length);
242 #endif
243 return (s);
244 err:
245 if (free_s && s)
246 M_ASN1_UTCTIME_free(s);
247 return NULL;
248 }
249
ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME * s,time_t t)250 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
251 {
252 struct tm *tm;
253 struct tm data;
254 int offset;
255 int year;
256
257 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
258
259 if (s->data[12] == 'Z')
260 offset = 0;
261 else {
262 offset = g2(s->data + 13) * 60 + g2(s->data + 15);
263 if (s->data[12] == '-')
264 offset = -offset;
265 }
266
267 t -= offset * 60; /* FIXME: may overflow in extreme cases */
268
269 tm = OPENSSL_gmtime(&t, &data);
270 /*
271 * NB: -1, 0, 1 already valid return values so use -2 to indicate error.
272 */
273 if (tm == NULL)
274 return -2;
275
276 #define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1
277 year = g2(s->data);
278 if (year < 50)
279 year += 100;
280 return_cmp(year, tm->tm_year);
281 return_cmp(g2(s->data + 2) - 1, tm->tm_mon);
282 return_cmp(g2(s->data + 4), tm->tm_mday);
283 return_cmp(g2(s->data + 6), tm->tm_hour);
284 return_cmp(g2(s->data + 8), tm->tm_min);
285 return_cmp(g2(s->data + 10), tm->tm_sec);
286 #undef g2
287 #undef return_cmp
288
289 return 0;
290 }
291
292 #if 0
293 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
294 {
295 struct tm tm;
296 int offset;
297
298 memset(&tm, '\0', sizeof tm);
299
300 # define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
301 tm.tm_year = g2(s->data);
302 if (tm.tm_year < 50)
303 tm.tm_year += 100;
304 tm.tm_mon = g2(s->data + 2) - 1;
305 tm.tm_mday = g2(s->data + 4);
306 tm.tm_hour = g2(s->data + 6);
307 tm.tm_min = g2(s->data + 8);
308 tm.tm_sec = g2(s->data + 10);
309 if (s->data[12] == 'Z')
310 offset = 0;
311 else {
312 offset = g2(s->data + 13) * 60 + g2(s->data + 15);
313 if (s->data[12] == '-')
314 offset = -offset;
315 }
316 # undef g2
317
318 /*
319 * FIXME: mktime assumes the current timezone
320 * instead of UTC, and unless we rewrite OpenSSL
321 * in Lisp we cannot locally change the timezone
322 * without possibly interfering with other parts
323 * of the program. timegm, which uses UTC, is
324 * non-standard.
325 * Also time_t is inappropriate for general
326 * UTC times because it may a 32 bit type.
327 */
328 return mktime(&tm) - offset * 60;
329 }
330 #endif
331