a_utctm.c revision 656d9c7f52f88b3a3daccafa7655dec086c4756e 
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
66int 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
85ASN1_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);
107err:
108	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
109		M_ASN1_UTCTIME_free(ret);
110	return(NULL);
111	}
112
113#endif
114
115int ASN1_UTCTIME_check(ASN1_UTCTIME *d)
116	{
117	static int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
118	static 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);
161err:
162	return(0);
163	}
164
165int 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
187ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
188	{
189	char *p;
190	struct tm *ts;
191	struct tm data;
192	size_t len = 20;
193
194	if (s == NULL)
195		s=M_ASN1_UTCTIME_new();
196	if (s == NULL)
197		return(NULL);
198
199	ts=OPENSSL_gmtime(&t, &data);
200	if (ts == NULL)
201		return(NULL);
202
203	p=(char *)s->data;
204	if ((p == NULL) || ((size_t)s->length < len))
205		{
206		p=OPENSSL_malloc(len);
207		if (p == NULL)
208			{
209			ASN1err(ASN1_F_ASN1_UTCTIME_SET,ERR_R_MALLOC_FAILURE);
210			return(NULL);
211			}
212		if (s->data != NULL)
213			OPENSSL_free(s->data);
214		s->data=(unsigned char *)p;
215		}
216
217	BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
218		     ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
219	s->length=strlen(p);
220	s->type=V_ASN1_UTCTIME;
221#ifdef CHARSET_EBCDIC_not
222	ebcdic2ascii(s->data, s->data, s->length);
223#endif
224	return(s);
225	}
226
227
228int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
229	{
230	struct tm *tm;
231	struct tm data;
232	int offset;
233	int year;
234
235#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
236
237	if (s->data[12] == 'Z')
238		offset=0;
239	else
240		{
241		offset = g2(s->data+13)*60+g2(s->data+15);
242		if (s->data[12] == '-')
243			offset = -offset;
244		}
245
246	t -= offset*60; /* FIXME: may overflow in extreme cases */
247
248	tm = OPENSSL_gmtime(&t, &data);
249
250#define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1
251	year = g2(s->data);
252	if (year < 50)
253		year += 100;
254	return_cmp(year,              tm->tm_year);
255	return_cmp(g2(s->data+2) - 1, tm->tm_mon);
256	return_cmp(g2(s->data+4),     tm->tm_mday);
257	return_cmp(g2(s->data+6),     tm->tm_hour);
258	return_cmp(g2(s->data+8),     tm->tm_min);
259	return_cmp(g2(s->data+10),    tm->tm_sec);
260#undef g2
261#undef return_cmp
262
263	return 0;
264	}
265
266
267#if 0
268time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
269	{
270	struct tm tm;
271	int offset;
272
273	memset(&tm,'\0',sizeof tm);
274
275#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
276	tm.tm_year=g2(s->data);
277	if(tm.tm_year < 50)
278		tm.tm_year+=100;
279	tm.tm_mon=g2(s->data+2)-1;
280	tm.tm_mday=g2(s->data+4);
281	tm.tm_hour=g2(s->data+6);
282	tm.tm_min=g2(s->data+8);
283	tm.tm_sec=g2(s->data+10);
284	if(s->data[12] == 'Z')
285		offset=0;
286	else
287		{
288		offset=g2(s->data+13)*60+g2(s->data+15);
289		if(s->data[12] == '-')
290			offset= -offset;
291		}
292#undef g2
293
294	return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone
295	                               * instead of UTC, and unless we rewrite OpenSSL
296				       * in Lisp we cannot locally change the timezone
297				       * without possibly interfering with other parts
298	                               * of the program. timegm, which uses UTC, is
299				       * non-standard.
300	                               * Also time_t is inappropriate for general
301	                               * UTC times because it may a 32 bit type. */
302	}
303#endif
304