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1 | /* crypto/asn1/a_utctm.c */ | |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include <time.h> | |
61 | #include "cryptlib.h" | |
62 | #include <openssl/asn1.h> | |
63 | #include "asn1_locl.h" | |
64 | ||
65 | int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d) | |
66 | { | |
67 | static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 }; | |
68 | static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 }; | |
69 | char *a; | |
70 | int n, i, l, o; | |
71 | ||
72 | if (d->type != V_ASN1_UTCTIME) | |
73 | return (0); | |
74 | l = d->length; | |
75 | a = (char *)d->data; | |
76 | o = 0; | |
77 | ||
78 | if (l < 11) | |
79 | goto err; | |
80 | for (i = 0; i < 6; i++) { | |
81 | if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { | |
82 | i++; | |
83 | if (tm) | |
84 | tm->tm_sec = 0; | |
85 | break; | |
86 | } | |
87 | if ((a[o] < '0') || (a[o] > '9')) | |
88 | goto err; | |
89 | n = a[o] - '0'; | |
90 | if (++o > l) | |
91 | goto err; | |
92 | ||
93 | if ((a[o] < '0') || (a[o] > '9')) | |
94 | goto err; | |
95 | n = (n * 10) + a[o] - '0'; | |
96 | if (++o > l) | |
97 | goto err; | |
98 | ||
99 | if ((n < min[i]) || (n > max[i])) | |
100 | goto err; | |
101 | if (tm) { | |
102 | switch (i) { | |
103 | case 0: | |
104 | tm->tm_year = n < 50 ? n + 100 : n; | |
105 | break; | |
106 | case 1: | |
107 | tm->tm_mon = n - 1; | |
108 | break; | |
109 | case 2: | |
110 | tm->tm_mday = n; | |
111 | break; | |
112 | case 3: | |
113 | tm->tm_hour = n; | |
114 | break; | |
115 | case 4: | |
116 | tm->tm_min = n; | |
117 | break; | |
118 | case 5: | |
119 | tm->tm_sec = n; | |
120 | break; | |
121 | } | |
122 | } | |
123 | } | |
124 | if (a[o] == 'Z') | |
125 | o++; | |
126 | else if ((a[o] == '+') || (a[o] == '-')) { | |
127 | int offsign = a[o] == '-' ? -1 : 1, offset = 0; | |
128 | o++; | |
129 | if (o + 4 > l) | |
130 | goto err; | |
131 | for (i = 6; i < 8; i++) { | |
132 | if ((a[o] < '0') || (a[o] > '9')) | |
133 | goto err; | |
134 | n = a[o] - '0'; | |
135 | o++; | |
136 | if ((a[o] < '0') || (a[o] > '9')) | |
137 | goto err; | |
138 | n = (n * 10) + a[o] - '0'; | |
139 | if ((n < min[i]) || (n > max[i])) | |
140 | goto err; | |
141 | if (tm) { | |
142 | if (i == 6) | |
143 | offset = n * 3600; | |
144 | else if (i == 7) | |
145 | offset += n * 60; | |
146 | } | |
147 | o++; | |
148 | } | |
149 | if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) | |
150 | return 0; | |
151 | } | |
152 | return o == l; | |
153 | err: | |
154 | return 0; | |
155 | } | |
156 | ||
157 | int ASN1_UTCTIME_check(const ASN1_UTCTIME *d) | |
158 | { | |
159 | return asn1_utctime_to_tm(NULL, d); | |
160 | } | |
161 | ||
162 | int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) | |
163 | { | |
164 | ASN1_UTCTIME t; | |
165 | ||
166 | t.type = V_ASN1_UTCTIME; | |
167 | t.length = strlen(str); | |
168 | t.data = (unsigned char *)str; | |
169 | if (ASN1_UTCTIME_check(&t)) { | |
170 | if (s != NULL) { | |
171 | if (!ASN1_STRING_set((ASN1_STRING *)s, | |
172 | (unsigned char *)str, t.length)) | |
173 | return 0; | |
174 | s->type = V_ASN1_UTCTIME; | |
175 | } | |
176 | return (1); | |
177 | } else | |
178 | return (0); | |
179 | } | |
180 | ||
181 | ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) | |
182 | { | |
183 | return ASN1_UTCTIME_adj(s, t, 0, 0); | |
184 | } | |
185 | ||
186 | ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, | |
187 | int offset_day, long offset_sec) | |
188 | { | |
189 | char *p; | |
190 | struct tm *ts; | |
191 | struct tm data; | |
192 | size_t len = 20; | |
193 | int free_s = 0; | |
194 | ||
195 | if (s == NULL) { | |
196 | s = ASN1_UTCTIME_new(); | |
197 | if (s == NULL) | |
198 | goto err; | |
199 | free_s = 1; | |
200 | } | |
201 | ||
202 | ts = OPENSSL_gmtime(&t, &data); | |
203 | if (ts == NULL) | |
204 | goto err; | |
205 | ||
206 | if (offset_day || offset_sec) { | |
207 | if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) | |
208 | goto err; | |
209 | } | |
210 | ||
211 | if ((ts->tm_year < 50) || (ts->tm_year >= 150)) | |
212 | goto err; | |
213 | ||
214 | p = (char *)s->data; | |
215 | if ((p == NULL) || ((size_t)s->length < len)) { | |
216 | p = OPENSSL_malloc(len); | |
217 | if (p == NULL) { | |
218 | ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE); | |
219 | goto err; | |
220 | } | |
221 | OPENSSL_free(s->data); | |
222 | s->data = (unsigned char *)p; | |
223 | } | |
224 | ||
225 | BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100, | |
226 | ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, | |
227 | ts->tm_sec); | |
228 | s->length = strlen(p); | |
229 | s->type = V_ASN1_UTCTIME; | |
230 | #ifdef CHARSET_EBCDIC_not | |
231 | ebcdic2ascii(s->data, s->data, s->length); | |
232 | #endif | |
233 | return (s); | |
234 | err: | |
235 | if (free_s) | |
236 | ASN1_UTCTIME_free(s); | |
237 | return NULL; | |
238 | } | |
239 | ||
240 | int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) | |
241 | { | |
242 | struct tm stm, ttm; | |
243 | int day, sec; | |
244 | ||
245 | if (!asn1_utctime_to_tm(&stm, s)) | |
246 | return -2; | |
247 | ||
248 | if (!OPENSSL_gmtime(&t, &ttm)) | |
249 | return -2; | |
250 | ||
251 | if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm)) | |
252 | return -2; | |
253 | ||
254 | if (day > 0) | |
255 | return 1; | |
256 | if (day < 0) | |
257 | return -1; | |
258 | if (sec > 0) | |
259 | return 1; | |
260 | if (sec < 0) | |
261 | return -1; | |
262 | return 0; | |
263 | } |