Line data Source code
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 :
71 : IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
72 :
73 0 : 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 0 : ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
103 : {
104 0 : return ASN1_TIME_adj(s, t, 0, 0);
105 : }
106 :
107 0 : 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 0 : ts = OPENSSL_gmtime(&t, &data);
114 0 : if (ts == NULL) {
115 0 : ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
116 0 : return NULL;
117 : }
118 0 : if (offset_day || offset_sec) {
119 0 : if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
120 : return NULL;
121 : }
122 0 : if ((ts->tm_year >= 50) && (ts->tm_year < 150))
123 0 : return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
124 0 : return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
125 : }
126 :
127 0 : int ASN1_TIME_check(ASN1_TIME *t)
128 : {
129 0 : if (t->type == V_ASN1_GENERALIZEDTIME)
130 0 : return ASN1_GENERALIZEDTIME_check(t);
131 0 : else if (t->type == V_ASN1_UTCTIME)
132 0 : return ASN1_UTCTIME_check(t);
133 : return 0;
134 : }
135 :
136 : /* Convert an ASN1_TIME structure to GeneralizedTime */
137 0 : 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 0 : if (!ASN1_TIME_check(t))
145 : return NULL;
146 :
147 0 : if (!out || !*out) {
148 0 : if (!(ret = ASN1_GENERALIZEDTIME_new()))
149 : return NULL;
150 0 : if (out)
151 0 : *out = ret;
152 : } else
153 : ret = *out;
154 :
155 : /* If already GeneralizedTime just copy across */
156 0 : if (t->type == V_ASN1_GENERALIZEDTIME) {
157 0 : if (!ASN1_STRING_set(ret, t->data, t->length))
158 : return NULL;
159 0 : return ret;
160 : }
161 :
162 : /* grow the string */
163 0 : if (!ASN1_STRING_set(ret, NULL, t->length + 2))
164 : return NULL;
165 : /* ASN1_STRING_set() allocated 'len + 1' bytes. */
166 0 : newlen = t->length + 2 + 1;
167 0 : str = (char *)ret->data;
168 : /* Work out the century and prepend */
169 0 : if (t->data[0] >= '5')
170 0 : BUF_strlcpy(str, "19", newlen);
171 : else
172 0 : BUF_strlcpy(str, "20", newlen);
173 :
174 0 : BUF_strlcat(str, (char *)t->data, newlen);
175 :
176 0 : return ret;
177 : }
178 :
179 0 : int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
180 : {
181 : ASN1_TIME t;
182 :
183 0 : t.length = strlen(str);
184 0 : t.data = (unsigned char *)str;
185 0 : t.flags = 0;
186 :
187 0 : t.type = V_ASN1_UTCTIME;
188 :
189 0 : if (!ASN1_TIME_check(&t)) {
190 0 : t.type = V_ASN1_GENERALIZEDTIME;
191 0 : if (!ASN1_TIME_check(&t))
192 : return 0;
193 : }
194 :
195 0 : if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
196 : return 0;
197 :
198 : return 1;
199 : }
200 :
201 0 : static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
202 : {
203 0 : if (t == NULL) {
204 : time_t now_t;
205 0 : time(&now_t);
206 0 : if (OPENSSL_gmtime(&now_t, tm))
207 : return 1;
208 0 : return 0;
209 : }
210 :
211 0 : if (t->type == V_ASN1_UTCTIME)
212 0 : return asn1_utctime_to_tm(tm, t);
213 0 : else if (t->type == V_ASN1_GENERALIZEDTIME)
214 0 : return asn1_generalizedtime_to_tm(tm, t);
215 :
216 : return 0;
217 : }
218 :
219 0 : 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 0 : if (!asn1_time_to_tm(&tm_from, from))
224 : return 0;
225 0 : if (!asn1_time_to_tm(&tm_to, to))
226 : return 0;
227 0 : return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
228 : }
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