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/err.h>
64 #include <openssl/mem.h>
65
66 #include "internal.h"
67
68 /*
69 * This is an implementation of the ASN1 Time structure which is: Time ::=
70 * CHOICE { utcTime UTCTime, generalTime GeneralizedTime } written by Steve
71 * Henson.
72 */
73
IMPLEMENT_ASN1_MSTRING(ASN1_TIME,B_ASN1_TIME)74 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
75
76 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
77
78 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
79 {
80 return ASN1_TIME_adj(s, t, 0, 0);
81 }
82
ASN1_TIME_adj(ASN1_TIME * s,time_t t,int offset_day,long offset_sec)83 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
84 int offset_day, long offset_sec)
85 {
86 struct tm *ts;
87 struct tm data;
88
89 ts = OPENSSL_gmtime(&t, &data);
90 if (ts == NULL) {
91 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ERROR_GETTING_TIME);
92 return NULL;
93 }
94 if (offset_day || offset_sec) {
95 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
96 return NULL;
97 }
98 if ((ts->tm_year >= 50) && (ts->tm_year < 150))
99 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
100 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
101 }
102
ASN1_TIME_check(const ASN1_TIME * t)103 int ASN1_TIME_check(const ASN1_TIME *t)
104 {
105 if (t->type == V_ASN1_GENERALIZEDTIME)
106 return ASN1_GENERALIZEDTIME_check(t);
107 else if (t->type == V_ASN1_UTCTIME)
108 return ASN1_UTCTIME_check(t);
109 return 0;
110 }
111
112 /* Convert an ASN1_TIME structure to GeneralizedTime */
ASN1_TIME_to_generalizedtime(const ASN1_TIME * t,ASN1_GENERALIZEDTIME ** out)113 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(const ASN1_TIME *t,
114 ASN1_GENERALIZEDTIME **out)
115 {
116 ASN1_GENERALIZEDTIME *ret = NULL;
117 char *str;
118 int newlen;
119
120 if (!ASN1_TIME_check(t))
121 return NULL;
122
123 if (!out || !*out) {
124 if (!(ret = ASN1_GENERALIZEDTIME_new()))
125 goto err;
126 } else {
127 ret = *out;
128 }
129
130 /* If already GeneralizedTime just copy across */
131 if (t->type == V_ASN1_GENERALIZEDTIME) {
132 if (!ASN1_STRING_set(ret, t->data, t->length))
133 goto err;
134 goto done;
135 }
136
137 /* grow the string */
138 if (!ASN1_STRING_set(ret, NULL, t->length + 2))
139 goto err;
140 /* ASN1_STRING_set() allocated 'len + 1' bytes. */
141 newlen = t->length + 2 + 1;
142 str = (char *)ret->data;
143 /* Work out the century and prepend */
144 if (t->data[0] >= '5')
145 OPENSSL_strlcpy(str, "19", newlen);
146 else
147 OPENSSL_strlcpy(str, "20", newlen);
148
149 OPENSSL_strlcat(str, (char *)t->data, newlen);
150
151 done:
152 if (out != NULL && *out == NULL)
153 *out = ret;
154 return ret;
155
156 err:
157 if (out == NULL || *out != ret)
158 ASN1_GENERALIZEDTIME_free(ret);
159 return NULL;
160 }
161
162
ASN1_TIME_set_string(ASN1_TIME * s,const char * str)163 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
164 {
165 ASN1_TIME t;
166
167 t.length = strlen(str);
168 t.data = (unsigned char *)str;
169 t.flags = 0;
170
171 t.type = V_ASN1_UTCTIME;
172
173 if (!ASN1_TIME_check(&t)) {
174 t.type = V_ASN1_GENERALIZEDTIME;
175 if (!ASN1_TIME_check(&t))
176 return 0;
177 }
178
179 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
180 return 0;
181
182 return 1;
183 }
184
asn1_time_to_tm(struct tm * tm,const ASN1_TIME * t)185 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
186 {
187 if (t == NULL) {
188 time_t now_t;
189 time(&now_t);
190 if (OPENSSL_gmtime(&now_t, tm))
191 return 1;
192 return 0;
193 }
194
195 if (t->type == V_ASN1_UTCTIME)
196 return asn1_utctime_to_tm(tm, t);
197 else if (t->type == V_ASN1_GENERALIZEDTIME)
198 return asn1_generalizedtime_to_tm(tm, t);
199
200 return 0;
201 }
202
ASN1_TIME_diff(int * out_days,int * out_seconds,const ASN1_TIME * from,const ASN1_TIME * to)203 int ASN1_TIME_diff(int *out_days, int *out_seconds,
204 const ASN1_TIME *from, const ASN1_TIME *to)
205 {
206 struct tm tm_from, tm_to;
207 if (!asn1_time_to_tm(&tm_from, from))
208 return 0;
209 if (!asn1_time_to_tm(&tm_to, to))
210 return 0;
211 return OPENSSL_gmtime_diff(out_days, out_seconds, &tm_from, &tm_to);
212 }
213