Line data Source code
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 : #include "asn1_locl.h"
65 :
66 : #if 0
67 : int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
68 : {
69 : # ifndef CHARSET_EBCDIC
70 : return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
71 : V_ASN1_UTCTIME, V_ASN1_UNIVERSAL));
72 : # else
73 : /* KLUDGE! We convert to ascii before writing DER */
74 : int len;
75 : char tmp[24];
76 : ASN1_STRING x = *(ASN1_STRING *)a;
77 :
78 : len = x.length;
79 : ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len);
80 : x.data = tmp;
81 : return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
82 : # endif
83 : }
84 :
85 : ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
86 : long length)
87 : {
88 : ASN1_UTCTIME *ret = NULL;
89 :
90 : ret = (ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
91 : V_ASN1_UTCTIME, V_ASN1_UNIVERSAL);
92 : if (ret == NULL) {
93 : ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ERR_R_NESTED_ASN1_ERROR);
94 : return (NULL);
95 : }
96 : # ifdef CHARSET_EBCDIC
97 : ascii2ebcdic(ret->data, ret->data, ret->length);
98 : # endif
99 : if (!ASN1_UTCTIME_check(ret)) {
100 : ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ASN1_R_INVALID_TIME_FORMAT);
101 : goto err;
102 : }
103 :
104 : return (ret);
105 : err:
106 : if ((ret != NULL) && ((a == NULL) || (*a != ret)))
107 : M_ASN1_UTCTIME_free(ret);
108 : return (NULL);
109 : }
110 :
111 : #endif
112 :
113 0 : int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
114 : {
115 : static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
116 : static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
117 : char *a;
118 : int n, i, l, o;
119 :
120 0 : if (d->type != V_ASN1_UTCTIME)
121 : return (0);
122 0 : l = d->length;
123 0 : a = (char *)d->data;
124 : o = 0;
125 :
126 0 : if (l < 11)
127 : goto err;
128 0 : for (i = 0; i < 6; i++) {
129 0 : if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
130 : i++;
131 0 : if (tm)
132 0 : tm->tm_sec = 0;
133 : break;
134 : }
135 0 : if ((a[o] < '0') || (a[o] > '9'))
136 : goto err;
137 0 : n = a[o] - '0';
138 0 : if (++o > l)
139 : goto err;
140 :
141 0 : if ((a[o] < '0') || (a[o] > '9'))
142 : goto err;
143 0 : n = (n * 10) + a[o] - '0';
144 0 : if (++o > l)
145 : goto err;
146 :
147 0 : if ((n < min[i]) || (n > max[i]))
148 : goto err;
149 0 : if (tm) {
150 0 : switch (i) {
151 : case 0:
152 0 : tm->tm_year = n < 50 ? n + 100 : n;
153 0 : break;
154 : case 1:
155 0 : tm->tm_mon = n - 1;
156 0 : break;
157 : case 2:
158 0 : tm->tm_mday = n;
159 0 : break;
160 : case 3:
161 0 : tm->tm_hour = n;
162 0 : break;
163 : case 4:
164 0 : tm->tm_min = n;
165 0 : break;
166 : case 5:
167 0 : tm->tm_sec = n;
168 0 : break;
169 : }
170 : }
171 : }
172 0 : if (a[o] == 'Z')
173 0 : o++;
174 0 : else if ((a[o] == '+') || (a[o] == '-')) {
175 0 : int offsign = a[o] == '-' ? -1 : 1, offset = 0;
176 0 : o++;
177 0 : if (o + 4 > l)
178 : goto err;
179 0 : for (i = 6; i < 8; i++) {
180 0 : if ((a[o] < '0') || (a[o] > '9'))
181 : goto err;
182 0 : n = a[o] - '0';
183 0 : o++;
184 0 : if ((a[o] < '0') || (a[o] > '9'))
185 : goto err;
186 0 : n = (n * 10) + a[o] - '0';
187 0 : if ((n < min[i]) || (n > max[i]))
188 : goto err;
189 0 : if (tm) {
190 0 : if (i == 6)
191 0 : offset = n * 3600;
192 0 : else if (i == 7)
193 0 : offset += n * 60;
194 : }
195 0 : o++;
196 : }
197 0 : if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
198 : return 0;
199 : }
200 0 : return o == l;
201 : err:
202 : return 0;
203 : }
204 :
205 0 : int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
206 : {
207 0 : return asn1_utctime_to_tm(NULL, d);
208 : }
209 :
210 0 : int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
211 : {
212 : ASN1_UTCTIME t;
213 :
214 0 : t.type = V_ASN1_UTCTIME;
215 0 : t.length = strlen(str);
216 0 : t.data = (unsigned char *)str;
217 0 : if (ASN1_UTCTIME_check(&t)) {
218 0 : if (s != NULL) {
219 0 : if (!ASN1_STRING_set((ASN1_STRING *)s,
220 : (unsigned char *)str, t.length))
221 : return 0;
222 0 : s->type = V_ASN1_UTCTIME;
223 : }
224 : return (1);
225 : } else
226 : return (0);
227 : }
228 :
229 0 : ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
230 : {
231 0 : return ASN1_UTCTIME_adj(s, t, 0, 0);
232 : }
233 :
234 1480 : ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
235 : int offset_day, long offset_sec)
236 : {
237 : char *p;
238 : struct tm *ts;
239 : struct tm data;
240 : size_t len = 20;
241 : int free_s = 0;
242 :
243 1480 : if (s == NULL) {
244 : free_s = 1;
245 0 : s = M_ASN1_UTCTIME_new();
246 : }
247 1480 : if (s == NULL)
248 : goto err;
249 :
250 1480 : ts = OPENSSL_gmtime(&t, &data);
251 1480 : if (ts == NULL)
252 : goto err;
253 :
254 1480 : if (offset_day || offset_sec) {
255 0 : if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
256 : goto err;
257 : }
258 :
259 1480 : if ((ts->tm_year < 50) || (ts->tm_year >= 150))
260 : goto err;
261 :
262 1480 : p = (char *)s->data;
263 1480 : if ((p == NULL) || ((size_t)s->length < len)) {
264 0 : p = OPENSSL_malloc(len);
265 0 : if (p == NULL) {
266 0 : ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
267 0 : goto err;
268 : }
269 0 : if (s->data != NULL)
270 0 : OPENSSL_free(s->data);
271 0 : s->data = (unsigned char *)p;
272 : }
273 :
274 2960 : BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
275 1480 : ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
276 : ts->tm_sec);
277 1480 : s->length = strlen(p);
278 1480 : s->type = V_ASN1_UTCTIME;
279 : #ifdef CHARSET_EBCDIC_not
280 : ebcdic2ascii(s->data, s->data, s->length);
281 : #endif
282 1480 : return (s);
283 : err:
284 0 : if (free_s && s)
285 0 : M_ASN1_UTCTIME_free(s);
286 : return NULL;
287 : }
288 :
289 0 : int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
290 : {
291 : struct tm stm, ttm;
292 : int day, sec;
293 :
294 0 : if (!asn1_utctime_to_tm(&stm, s))
295 : return -2;
296 :
297 0 : if (!OPENSSL_gmtime(&t, &ttm))
298 : return -2;
299 :
300 0 : if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
301 : return -2;
302 :
303 0 : if (day > 0)
304 : return 1;
305 0 : if (day < 0)
306 : return -1;
307 0 : if (sec > 0)
308 : return 1;
309 0 : if (sec < 0)
310 : return -1;
311 0 : return 0;
312 : }
313 :
314 : #if 0
315 : time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
316 : {
317 : struct tm tm;
318 : int offset;
319 :
320 : memset(&tm, '\0', sizeof tm);
321 :
322 : # define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
323 : tm.tm_year = g2(s->data);
324 : if (tm.tm_year < 50)
325 : tm.tm_year += 100;
326 : tm.tm_mon = g2(s->data + 2) - 1;
327 : tm.tm_mday = g2(s->data + 4);
328 : tm.tm_hour = g2(s->data + 6);
329 : tm.tm_min = g2(s->data + 8);
330 : tm.tm_sec = g2(s->data + 10);
331 : if (s->data[12] == 'Z')
332 : offset = 0;
333 : else {
334 : offset = g2(s->data + 13) * 60 + g2(s->data + 15);
335 : if (s->data[12] == '-')
336 : offset = -offset;
337 : }
338 : # undef g2
339 :
340 : /*
341 : * FIXME: mktime assumes the current timezone
342 : * instead of UTC, and unless we rewrite OpenSSL
343 : * in Lisp we cannot locally change the timezone
344 : * without possibly interfering with other parts
345 : * of the program. timegm, which uses UTC, is
346 : * non-standard.
347 : * Also time_t is inappropriate for general
348 : * UTC times because it may a 32 bit type.
349 : */
350 : return mktime(&tm) - offset * 60;
351 : }
352 : #endif
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