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/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/time_support.h>
65
66
asn1_generalizedtime_to_tm(struct tm * tm,const ASN1_GENERALIZEDTIME * d)67 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
68 {
69 static const int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0};
70 static const int max[9]={99, 99,12,31,23,59,59,12,59};
71 char *a;
72 int n,i,l,o;
73
74 if (d->type != V_ASN1_GENERALIZEDTIME) return(0);
75 l=d->length;
76 a=(char *)d->data;
77 o=0;
78 /* GENERALIZEDTIME is similar to UTCTIME except the year is
79 * represented as YYYY. This stuff treats everything as a two digit
80 * field so make first two fields 00 to 99
81 */
82 if (l < 13) goto err;
83 for (i=0; i<7; i++)
84 {
85 if ((i == 6) && ((a[o] == 'Z') ||
86 (a[o] == '+') || (a[o] == '-')))
87 {
88 i++;
89 if (tm)
90 tm->tm_sec = 0;
91 break;
92 }
93 if ((a[o] < '0') || (a[o] > '9')) goto err;
94 n= a[o]-'0';
95 if (++o > l) goto err;
96
97 if ((a[o] < '0') || (a[o] > '9')) goto err;
98 n=(n*10)+ a[o]-'0';
99 if (++o > l) goto err;
100
101 if ((n < min[i]) || (n > max[i])) goto err;
102 if (tm)
103 {
104 switch(i)
105 {
106 case 0:
107 tm->tm_year = n * 100 - 1900;
108 break;
109 case 1:
110 tm->tm_year += n;
111 break;
112 case 2:
113 tm->tm_mon = n - 1;
114 break;
115 case 3:
116 tm->tm_mday = n;
117 break;
118 case 4:
119 tm->tm_hour = n;
120 break;
121 case 5:
122 tm->tm_min = n;
123 break;
124 case 6:
125 tm->tm_sec = n;
126 break;
127 }
128 }
129 }
130 /* Optional fractional seconds: decimal point followed by one
131 * or more digits.
132 */
133 if (a[o] == '.')
134 {
135 if (++o > l) goto err;
136 i = o;
137 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
138 o++;
139 /* Must have at least one digit after decimal point */
140 if (i == o) goto err;
141 }
142
143 if (a[o] == 'Z')
144 o++;
145 else if ((a[o] == '+') || (a[o] == '-'))
146 {
147 int offsign = a[o] == '-' ? -1 : 1, offset = 0;
148 o++;
149 if (o+4 > l) goto err;
150 for (i=7; i<9; i++)
151 {
152 if ((a[o] < '0') || (a[o] > '9')) goto err;
153 n= a[o]-'0';
154 o++;
155 if ((a[o] < '0') || (a[o] > '9')) goto err;
156 n=(n*10)+ a[o]-'0';
157 if ((n < min[i]) || (n > max[i])) goto err;
158 if (tm)
159 {
160 if (i == 7)
161 offset = n * 3600;
162 else if (i == 8)
163 offset += n * 60;
164 }
165 o++;
166 }
167 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
168 return 0;
169 }
170 else if (a[o])
171 {
172 /* Missing time zone information. */
173 goto err;
174 }
175 return(o == l);
176 err:
177 return(0);
178 }
179
ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME * d)180 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
181 {
182 return asn1_generalizedtime_to_tm(NULL, d);
183 }
184
ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME * s,const char * str)185 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
186 {
187 ASN1_GENERALIZEDTIME t;
188
189 t.type=V_ASN1_GENERALIZEDTIME;
190 t.length=strlen(str);
191 t.data=(unsigned char *)str;
192 if (ASN1_GENERALIZEDTIME_check(&t))
193 {
194 if (s != NULL)
195 {
196 if (!ASN1_STRING_set((ASN1_STRING *)s,
197 (unsigned char *)str,t.length))
198 return 0;
199 s->type=V_ASN1_GENERALIZEDTIME;
200 }
201 return(1);
202 }
203 else
204 return(0);
205 }
206
ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME * s,time_t t)207 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
208 time_t t)
209 {
210 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
211 }
212
ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME * s,time_t t,int offset_day,long offset_sec)213 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
214 time_t t, int offset_day, long offset_sec)
215 {
216 char *p;
217 struct tm *ts;
218 struct tm data;
219 size_t len = 20;
220
221 if (s == NULL)
222 s=M_ASN1_GENERALIZEDTIME_new();
223 if (s == NULL)
224 return(NULL);
225
226 ts=OPENSSL_gmtime(&t, &data);
227 if (ts == NULL)
228 return(NULL);
229
230 if (offset_day || offset_sec)
231 {
232 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
233 return NULL;
234 }
235
236 p=(char *)s->data;
237 if ((p == NULL) || ((size_t)s->length < len))
238 {
239 p=OPENSSL_malloc(len);
240 if (p == NULL)
241 {
242 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
243 return(NULL);
244 }
245 if (s->data != NULL)
246 OPENSSL_free(s->data);
247 s->data=(unsigned char *)p;
248 }
249
250 BIO_snprintf(p,len,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900,
251 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
252 s->length=strlen(p);
253 s->type=V_ASN1_GENERALIZEDTIME;
254 return(s);
255 }
256