1 /* crypto/asn1/a_time.c */
2 /* ====================================================================
3 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * licensing@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
53 *
54 */
55
56 /*-
57 * This is an implementation of the ASN1 Time structure which is:
58 * Time ::= CHOICE {
59 * utcTime UTCTime,
60 * generalTime GeneralizedTime }
61 * written by Steve Henson.
62 */
63
64 #include <stdio.h>
65 #include <time.h>
66 #include "cryptlib.h"
67 #include "o_time.h"
68 #include <openssl/asn1t.h>
69 #include "asn1_locl.h"
70
IMPLEMENT_ASN1_MSTRING(ASN1_TIME,B_ASN1_TIME)71 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
72
73 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
74
75 #if 0
76 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
77 {
78 # ifdef CHARSET_EBCDIC
79 /* KLUDGE! We convert to ascii before writing DER */
80 char tmp[24];
81 ASN1_STRING tmpstr;
82
83 if (a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) {
84 int len;
85
86 tmpstr = *(ASN1_STRING *)a;
87 len = tmpstr.length;
88 ebcdic2ascii(tmp, tmpstr.data,
89 (len >= sizeof tmp) ? sizeof tmp : len);
90 tmpstr.data = tmp;
91 a = (ASN1_GENERALIZEDTIME *)&tmpstr;
92 }
93 # endif
94 if (a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME)
95 return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
96 a->type, V_ASN1_UNIVERSAL));
97 ASN1err(ASN1_F_I2D_ASN1_TIME, ASN1_R_EXPECTING_A_TIME);
98 return -1;
99 }
100 #endif
101
102 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
103 {
104 return ASN1_TIME_adj(s, t, 0, 0);
105 }
106
ASN1_TIME_adj(ASN1_TIME * s,time_t t,int offset_day,long offset_sec)107 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
108 int offset_day, long offset_sec)
109 {
110 struct tm *ts;
111 struct tm data;
112
113 ts = OPENSSL_gmtime(&t, &data);
114 if (ts == NULL) {
115 ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
116 return NULL;
117 }
118 if (offset_day || offset_sec) {
119 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
120 return NULL;
121 }
122 if ((ts->tm_year >= 50) && (ts->tm_year < 150))
123 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
124 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
125 }
126
ASN1_TIME_check(ASN1_TIME * t)127 int ASN1_TIME_check(ASN1_TIME *t)
128 {
129 if (t->type == V_ASN1_GENERALIZEDTIME)
130 return ASN1_GENERALIZEDTIME_check(t);
131 else if (t->type == V_ASN1_UTCTIME)
132 return ASN1_UTCTIME_check(t);
133 return 0;
134 }
135
136 /* Convert an ASN1_TIME structure to GeneralizedTime */
ASN1_TIME_to_generalizedtime(ASN1_TIME * t,ASN1_GENERALIZEDTIME ** out)137 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
138 ASN1_GENERALIZEDTIME **out)
139 {
140 ASN1_GENERALIZEDTIME *ret;
141 char *str;
142 int newlen;
143
144 if (!ASN1_TIME_check(t))
145 return NULL;
146
147 if (!out || !*out) {
148 if (!(ret = ASN1_GENERALIZEDTIME_new()))
149 return NULL;
150 if (out)
151 *out = ret;
152 } else
153 ret = *out;
154
155 /* If already GeneralizedTime just copy across */
156 if (t->type == V_ASN1_GENERALIZEDTIME) {
157 if (!ASN1_STRING_set(ret, t->data, t->length))
158 return NULL;
159 return ret;
160 }
161
162 /* grow the string */
163 if (!ASN1_STRING_set(ret, NULL, t->length + 2))
164 return NULL;
165 /* ASN1_STRING_set() allocated 'len + 1' bytes. */
166 newlen = t->length + 2 + 1;
167 str = (char *)ret->data;
168 /* Work out the century and prepend */
169 if (t->data[0] >= '5')
170 BUF_strlcpy(str, "19", newlen);
171 else
172 BUF_strlcpy(str, "20", newlen);
173
174 BUF_strlcat(str, (char *)t->data, newlen);
175
176 return ret;
177 }
178
ASN1_TIME_set_string(ASN1_TIME * s,const char * str)179 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
180 {
181 ASN1_TIME t;
182
183 t.length = strlen(str);
184 t.data = (unsigned char *)str;
185 t.flags = 0;
186
187 t.type = V_ASN1_UTCTIME;
188
189 if (!ASN1_TIME_check(&t)) {
190 t.type = V_ASN1_GENERALIZEDTIME;
191 if (!ASN1_TIME_check(&t))
192 return 0;
193 }
194
195 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
196 return 0;
197
198 return 1;
199 }
200
asn1_time_to_tm(struct tm * tm,const ASN1_TIME * t)201 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
202 {
203 if (t == NULL) {
204 time_t now_t;
205 time(&now_t);
206 if (OPENSSL_gmtime(&now_t, tm))
207 return 1;
208 return 0;
209 }
210
211 if (t->type == V_ASN1_UTCTIME)
212 return asn1_utctime_to_tm(tm, t);
213 else if (t->type == V_ASN1_GENERALIZEDTIME)
214 return asn1_generalizedtime_to_tm(tm, t);
215
216 return 0;
217 }
218
ASN1_TIME_diff(int * pday,int * psec,const ASN1_TIME * from,const ASN1_TIME * to)219 int ASN1_TIME_diff(int *pday, int *psec,
220 const ASN1_TIME *from, const ASN1_TIME *to)
221 {
222 struct tm tm_from, tm_to;
223 if (!asn1_time_to_tm(&tm_from, from))
224 return 0;
225 if (!asn1_time_to_tm(&tm_to, to))
226 return 0;
227 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
228 }
229