1 /* crypto/asn1/a_gentm.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 /*
60  * GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME
61  */
62 
63 #include <stdio.h>
64 #include <time.h>
65 #include "cryptlib.h"
66 #include "o_time.h"
67 #include <openssl/asn1.h>
68 
69 #if 0
70 
71 int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp)
72 {
73 # ifdef CHARSET_EBCDIC
74     /* KLUDGE! We convert to ascii before writing DER */
75     int len;
76     char tmp[24];
77     ASN1_STRING tmpstr = *(ASN1_STRING *)a;
78 
79     len = tmpstr.length;
80     ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len);
81     tmpstr.data = tmp;
82 
83     a = (ASN1_GENERALIZEDTIME *)&tmpstr;
84 # endif
85     return (i2d_ASN1_bytes((ASN1_STRING *)a, pp,
86                            V_ASN1_GENERALIZEDTIME, V_ASN1_UNIVERSAL));
87 }
88 
89 ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a,
90                                                unsigned char **pp,
91                                                long length)
92 {
93     ASN1_GENERALIZEDTIME *ret = NULL;
94 
95     ret =
96         (ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length,
97                                                V_ASN1_GENERALIZEDTIME,
98                                                V_ASN1_UNIVERSAL);
99     if (ret == NULL) {
100         ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ERR_R_NESTED_ASN1_ERROR);
101         return (NULL);
102     }
103 # ifdef CHARSET_EBCDIC
104     ascii2ebcdic(ret->data, ret->data, ret->length);
105 # endif
106     if (!ASN1_GENERALIZEDTIME_check(ret)) {
107         ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ASN1_R_INVALID_TIME_FORMAT);
108         goto err;
109     }
110 
111     return (ret);
112  err:
113     if ((ret != NULL) && ((a == NULL) || (*a != ret)))
114         M_ASN1_GENERALIZEDTIME_free(ret);
115     return (NULL);
116 }
117 
118 #endif
119 
ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME * d)120 int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d)
121 {
122     static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
123     static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
124     char *a;
125     int n, i, l, o;
126 
127     if (d->type != V_ASN1_GENERALIZEDTIME)
128         return (0);
129     l = d->length;
130     a = (char *)d->data;
131     o = 0;
132     /*
133      * GENERALIZEDTIME is similar to UTCTIME except the year is represented
134      * as YYYY. This stuff treats everything as a two digit field so make
135      * first two fields 00 to 99
136      */
137     if (l < 13)
138         goto err;
139     for (i = 0; i < 7; i++) {
140         if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
141             i++;
142             break;
143         }
144         if ((a[o] < '0') || (a[o] > '9'))
145             goto err;
146         n = a[o] - '0';
147         if (++o > l)
148             goto err;
149 
150         if ((a[o] < '0') || (a[o] > '9'))
151             goto err;
152         n = (n * 10) + a[o] - '0';
153         if (++o > l)
154             goto err;
155 
156         if ((n < min[i]) || (n > max[i]))
157             goto err;
158     }
159     /*
160      * Optional fractional seconds: decimal point followed by one or more
161      * digits.
162      */
163     if (a[o] == '.') {
164         if (++o > l)
165             goto err;
166         i = o;
167         while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
168             o++;
169         /* Must have at least one digit after decimal point */
170         if (i == o)
171             goto err;
172     }
173 
174     if (a[o] == 'Z')
175         o++;
176     else if ((a[o] == '+') || (a[o] == '-')) {
177         o++;
178         if (o + 4 > l)
179             goto err;
180         for (i = 7; i < 9; i++) {
181             if ((a[o] < '0') || (a[o] > '9'))
182                 goto err;
183             n = a[o] - '0';
184             o++;
185             if ((a[o] < '0') || (a[o] > '9'))
186                 goto err;
187             n = (n * 10) + a[o] - '0';
188             if ((n < min[i]) || (n > max[i]))
189                 goto err;
190             o++;
191         }
192     } else {
193         /* Missing time zone information. */
194         goto err;
195     }
196     return (o == l);
197  err:
198     return (0);
199 }
200 
ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME * s,const char * str)201 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
202 {
203     ASN1_GENERALIZEDTIME t;
204 
205     t.type = V_ASN1_GENERALIZEDTIME;
206     t.length = strlen(str);
207     t.data = (unsigned char *)str;
208     if (ASN1_GENERALIZEDTIME_check(&t)) {
209         if (s != NULL) {
210             if (!ASN1_STRING_set((ASN1_STRING *)s,
211                                  (unsigned char *)str, t.length))
212                 return 0;
213             s->type = V_ASN1_GENERALIZEDTIME;
214         }
215         return (1);
216     } else
217         return (0);
218 }
219 
ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME * s,time_t t)220 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
221                                                time_t t)
222 {
223     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
224 }
225 
ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME * s,time_t t,int offset_day,long offset_sec)226 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
227                                                time_t t, int offset_day,
228                                                long offset_sec)
229 {
230     char *p;
231     struct tm *ts;
232     struct tm data;
233     size_t len = 20;
234 
235     if (s == NULL)
236         s = M_ASN1_GENERALIZEDTIME_new();
237     if (s == NULL)
238         return (NULL);
239 
240     ts = OPENSSL_gmtime(&t, &data);
241     if (ts == NULL)
242         return (NULL);
243 
244     if (offset_day || offset_sec) {
245         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
246             return NULL;
247     }
248 
249     p = (char *)s->data;
250     if ((p == NULL) || ((size_t)s->length < len)) {
251         p = OPENSSL_malloc(len);
252         if (p == NULL) {
253             ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
254             return (NULL);
255         }
256         if (s->data != NULL)
257             OPENSSL_free(s->data);
258         s->data = (unsigned char *)p;
259     }
260 
261     BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
262                  ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
263                  ts->tm_sec);
264     s->length = strlen(p);
265     s->type = V_ASN1_GENERALIZEDTIME;
266 #ifdef CHARSET_EBCDIC_not
267     ebcdic2ascii(s->data, s->data, s->length);
268 #endif
269     return (s);
270 }
271