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
319