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