1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/asn1.h>
58
59#include <string.h>
60#include <time.h>
61
62#include <openssl/err.h>
63#include <openssl/mem.h>
64#include <openssl/time_support.h>
65
66
67#if 0
68int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
69	{
70	return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
71		V_ASN1_UTCTIME,V_ASN1_UNIVERSAL));
72	}
73
74
75ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
76	     long length)
77	{
78	ASN1_UTCTIME *ret=NULL;
79
80	ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
81		V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);
82	if (ret == NULL)
83		{
84		OPENSSL_PUT_ERROR(ASN1, ERR_R_NESTED_ASN1_ERROR);
85		return(NULL);
86		}
87	if (!ASN1_UTCTIME_check(ret))
88		{
89		OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_TIME_FORMAT);
90		goto err;
91		}
92
93	return(ret);
94err:
95	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
96		M_ASN1_UTCTIME_free(ret);
97	return(NULL);
98	}
99
100#endif
101
102int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
103	{
104	static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
105	static const int max[8]={99,12,31,23,59,59,12,59};
106	char *a;
107	int n,i,l,o;
108
109	if (d->type != V_ASN1_UTCTIME) return(0);
110	l=d->length;
111	a=(char *)d->data;
112	o=0;
113
114	if (l < 11) goto err;
115	for (i=0; i<6; i++)
116		{
117		if ((i == 5) && ((a[o] == 'Z') ||
118			(a[o] == '+') || (a[o] == '-')))
119			{
120			i++;
121			if (tm)
122				tm->tm_sec = 0;
123			break;
124			}
125		if ((a[o] < '0') || (a[o] > '9')) goto err;
126		n= a[o]-'0';
127		if (++o > l) goto err;
128
129		if ((a[o] < '0') || (a[o] > '9')) goto err;
130		n=(n*10)+ a[o]-'0';
131		if (++o > l) goto err;
132
133		if ((n < min[i]) || (n > max[i])) goto err;
134		if (tm)
135			{
136			switch(i)
137				{
138			case 0:
139				tm->tm_year = n < 50 ? n + 100 : n;
140				break;
141			case 1:
142				tm->tm_mon = n - 1;
143				break;
144			case 2:
145				tm->tm_mday = n;
146				break;
147			case 3:
148				tm->tm_hour = n;
149				break;
150			case 4:
151				tm->tm_min = n;
152				break;
153			case 5:
154				tm->tm_sec = n;
155				break;
156				}
157			}
158		}
159	if (a[o] == 'Z')
160		o++;
161	else if ((a[o] == '+') || (a[o] == '-'))
162		{
163		int offsign = a[o] == '-' ? -1 : 1, offset = 0;
164		o++;
165		if (o+4 > l) goto err;
166		for (i=6; i<8; i++)
167			{
168			if ((a[o] < '0') || (a[o] > '9')) goto err;
169			n= a[o]-'0';
170			o++;
171			if ((a[o] < '0') || (a[o] > '9')) goto err;
172			n=(n*10)+ a[o]-'0';
173			if ((n < min[i]) || (n > max[i])) goto err;
174			if (tm)
175				{
176				if (i == 6)
177					offset = n * 3600;
178				else if (i == 7)
179					offset += n * 60;
180				}
181			o++;
182			}
183		if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
184			return 0;
185		}
186	return o == l;
187err:
188	return 0;
189	}
190
191int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
192	{
193	return asn1_utctime_to_tm(NULL, d);
194	}
195
196int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
197	{
198	ASN1_UTCTIME t;
199
200	t.type=V_ASN1_UTCTIME;
201	t.length=strlen(str);
202	t.data=(unsigned char *)str;
203	if (ASN1_UTCTIME_check(&t))
204		{
205		if (s != NULL)
206			{
207			if (!ASN1_STRING_set((ASN1_STRING *)s,
208				(unsigned char *)str,t.length))
209				return 0;
210			s->type = V_ASN1_UTCTIME;
211			}
212		return(1);
213		}
214	else
215		return(0);
216	}
217
218ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
219	{
220	return ASN1_UTCTIME_adj(s, t, 0, 0);
221	}
222
223ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
224				int offset_day, long offset_sec)
225	{
226	char *p;
227	struct tm *ts;
228	struct tm data;
229	size_t len = 20;
230	int free_s = 0;
231
232	if (s == NULL)
233		{
234		free_s = 1;
235		s=M_ASN1_UTCTIME_new();
236		}
237	if (s == NULL)
238		goto err;
239
240
241	ts=OPENSSL_gmtime(&t, &data);
242	if (ts == NULL)
243		goto err;
244
245	if (offset_day || offset_sec)
246		{
247		if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
248			goto err;
249		}
250
251	if((ts->tm_year < 50) || (ts->tm_year >= 150))
252		goto err;
253
254	p=(char *)s->data;
255	if ((p == NULL) || ((size_t)s->length < len))
256		{
257		p=OPENSSL_malloc(len);
258		if (p == NULL)
259			{
260			OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
261			goto err;
262			}
263		if (s->data != NULL)
264			OPENSSL_free(s->data);
265		s->data=(unsigned char *)p;
266		}
267
268	BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
269		     ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
270	s->length=strlen(p);
271	s->type=V_ASN1_UTCTIME;
272	return(s);
273	err:
274	if (free_s && s)
275		M_ASN1_UTCTIME_free(s);
276	return NULL;
277	}
278
279
280int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
281	{
282	struct tm stm, ttm;
283	int day, sec;
284
285	if (!asn1_utctime_to_tm(&stm, s))
286		return -2;
287
288	if (!OPENSSL_gmtime(&t, &ttm))
289		return -2;
290
291	if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
292		return -2;
293
294	if (day > 0)
295		return 1;
296	if (day < 0)
297		return -1;
298	if (sec > 0)
299		return 1;
300	if (sec < 0)
301		return -1;
302	return 0;
303	}
304
305
306#if 0
307time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
308	{
309	struct tm tm;
310	int offset;
311
312	memset(&tm,'\0',sizeof tm);
313
314#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
315	tm.tm_year=g2(s->data);
316	if(tm.tm_year < 50)
317		tm.tm_year+=100;
318	tm.tm_mon=g2(s->data+2)-1;
319	tm.tm_mday=g2(s->data+4);
320	tm.tm_hour=g2(s->data+6);
321	tm.tm_min=g2(s->data+8);
322	tm.tm_sec=g2(s->data+10);
323	if(s->data[12] == 'Z')
324		offset=0;
325	else
326		{
327		offset=g2(s->data+13)*60+g2(s->data+15);
328		if(s->data[12] == '-')
329			offset= -offset;
330		}
331#undef g2
332
333	return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone
334	                               * instead of UTC, and unless we rewrite OpenSSL
335				       * in Lisp we cannot locally change the timezone
336				       * without possibly interfering with other parts
337	                               * of the program. timegm, which uses UTC, is
338				       * non-standard.
339	                               * Also time_t is inappropriate for general
340	                               * UTC times because it may a 32 bit type. */
341	}
342#endif
343