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/asn1t.h>
63 #include <openssl/buf.h>
64 #include <openssl/err.h>
65 #include <openssl/mem.h>
66 #include <openssl/time_support.h>
67
68 #include "asn1_locl.h"
69
70
71 /* This is an implementation of the ASN1 Time structure which is:
72 * Time ::= CHOICE {
73 * utcTime UTCTime,
74 * generalTime GeneralizedTime }
75 * written by Steve Henson.
76 */
77
IMPLEMENT_ASN1_MSTRING(ASN1_TIME,B_ASN1_TIME)78 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
79
80 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
81
82 #if 0
83 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
84 {
85 if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
86 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
87 a->type ,V_ASN1_UNIVERSAL));
88 OPENSSL_PUT_ERROR(ASN1, ASN1_R_EXPECTING_A_TIME);
89 return -1;
90 }
91 #endif
92
93
94 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
95 {
96 return ASN1_TIME_adj(s, t, 0, 0);
97 }
98
ASN1_TIME_adj(ASN1_TIME * s,time_t t,int offset_day,long offset_sec)99 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
100 int offset_day, long offset_sec)
101 {
102 struct tm *ts;
103 struct tm data;
104
105 ts=OPENSSL_gmtime(&t,&data);
106 if (ts == NULL)
107 {
108 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ERROR_GETTING_TIME);
109 return NULL;
110 }
111 if (offset_day || offset_sec)
112 {
113 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
114 return NULL;
115 }
116 if((ts->tm_year >= 50) && (ts->tm_year < 150))
117 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
118 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
119 }
120
ASN1_TIME_check(ASN1_TIME * t)121 int ASN1_TIME_check(ASN1_TIME *t)
122 {
123 if (t->type == V_ASN1_GENERALIZEDTIME)
124 return ASN1_GENERALIZEDTIME_check(t);
125 else if (t->type == V_ASN1_UTCTIME)
126 return ASN1_UTCTIME_check(t);
127 return 0;
128 }
129
130 /* Convert an ASN1_TIME structure to GeneralizedTime */
ASN1_TIME_to_generalizedtime(ASN1_TIME * t,ASN1_GENERALIZEDTIME ** out)131 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
132 {
133 ASN1_GENERALIZEDTIME *ret;
134 char *str;
135 int newlen;
136
137 if (!ASN1_TIME_check(t)) return NULL;
138
139 if (!out || !*out)
140 {
141 if (!(ret = ASN1_GENERALIZEDTIME_new ()))
142 return NULL;
143 if (out) *out = ret;
144 }
145 else ret = *out;
146
147 /* If already GeneralizedTime just copy across */
148 if (t->type == V_ASN1_GENERALIZEDTIME)
149 {
150 if(!ASN1_STRING_set(ret, t->data, t->length))
151 return NULL;
152 return ret;
153 }
154
155 /* grow the string */
156 if (!ASN1_STRING_set(ret, NULL, t->length + 2))
157 return NULL;
158 /* ASN1_STRING_set() allocated 'len + 1' bytes. */
159 newlen = t->length + 2 + 1;
160 str = (char *)ret->data;
161 /* Work out the century and prepend */
162 if (t->data[0] >= '5') BUF_strlcpy(str, "19", newlen);
163 else BUF_strlcpy(str, "20", newlen);
164
165 BUF_strlcat(str, (char *)t->data, newlen);
166
167 return ret;
168 }
169
ASN1_TIME_set_string(ASN1_TIME * s,const char * str)170 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
171 {
172 ASN1_TIME t;
173
174 t.length = strlen(str);
175 t.data = (unsigned char *)str;
176 t.flags = 0;
177
178 t.type = V_ASN1_UTCTIME;
179
180 if (!ASN1_TIME_check(&t))
181 {
182 t.type = V_ASN1_GENERALIZEDTIME;
183 if (!ASN1_TIME_check(&t))
184 return 0;
185 }
186
187 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
188 return 0;
189
190 return 1;
191 }
192
asn1_time_to_tm(struct tm * tm,const ASN1_TIME * t)193 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
194 {
195 if (t == NULL)
196 {
197 time_t now_t;
198 time(&now_t);
199 if (OPENSSL_gmtime(&now_t, tm))
200 return 1;
201 return 0;
202 }
203
204 if (t->type == V_ASN1_UTCTIME)
205 return asn1_utctime_to_tm(tm, t);
206 else if (t->type == V_ASN1_GENERALIZEDTIME)
207 return asn1_generalizedtime_to_tm(tm, t);
208
209 return 0;
210 }
211
ASN1_TIME_diff(int * pday,int * psec,const ASN1_TIME * from,const ASN1_TIME * to)212 int ASN1_TIME_diff(int *pday, int *psec,
213 const ASN1_TIME *from, const ASN1_TIME *to)
214 {
215 struct tm tm_from, tm_to;
216 if (!asn1_time_to_tm(&tm_from, from))
217 return 0;
218 if (!asn1_time_to_tm(&tm_to, to))
219 return 0;
220 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
221 }
222