2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * GENERALIZEDTIME implementation. Based on UTCTIME
16 #include "internal/cryptlib.h"
17 #include <openssl/asn1.h>
18 #include "asn1_locl.h"
20 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
22 static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
23 static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
25 int n, i, l, o, min_l = 13, strict = 0;
27 if (d->type != V_ASN1_GENERALIZEDTIME)
33 * GENERALIZEDTIME is similar to UTCTIME except the year is represented
34 * as YYYY. This stuff treats everything as a two digit field so make
35 * first two fields 00 to 99
39 * ASN1_STRING_FLAG_X509_TIME is used to enforce RFC 5280
40 * time string format, in which:
42 * 1. "seconds" is a 'MUST'
43 * 2. "Zulu" timezone is a 'MUST'
44 * 3. "+|-" is not allowed to indicate a time zone
45 * 4. fractional seconds are not allowed in GeneralizedTime
48 if (d->flags & ASN1_STRING_FLAG_X509_TIME) {
55 for (i = 0; i < 7; i++) {
56 if (!strict && (i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
62 if ((a[o] < '0') || (a[o] > '9'))
65 /* incomplete 2-digital number */
69 if ((a[o] < '0') || (a[o] > '9'))
71 n = (n * 10) + a[o] - '0';
72 /* no more bytes to read, but we haven't seen time-zone yet */
76 if ((n < min[i]) || (n > max[i]))
81 tm->tm_year = n * 100 - 1900;
105 * Optional fractional seconds: decimal point followed by one or more
110 /* RFC 5280 forbids fractional seconds */
115 while ((o < l) && (a[o] >= '0') && (a[o] <= '9'))
117 /* Must have at least one digit after decimal point */
120 /* no more bytes to read, but we haven't seen time-zone yet */
126 * 'o' will never point to '\0' at this point, the only chance
127 * 'o' can point th '\0' is either the subsequent if or the first
132 } else if (!strict && ((a[o] == '+') || (a[o] == '-'))) {
133 int offsign = a[o] == '-' ? 1 : -1, offset = 0;
136 * if not equal, no need to do subsequent checks
137 * since the following for-loop will add 'o' by 4
138 * and the final return statement will check if 'l'
143 for (i = 7; i < 9; i++) {
144 if ((a[o] < '0') || (a[o] > '9'))
148 if ((a[o] < '0') || (a[o] > '9'))
150 n = (n * 10) + a[o] - '0';
151 if ((n < min[i]) || (n > max[i]))
161 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
164 /* Missing time zone information. */
172 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
174 return asn1_generalizedtime_to_tm(NULL, d);
177 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
179 ASN1_GENERALIZEDTIME t;
181 t.type = V_ASN1_GENERALIZEDTIME;
182 t.length = strlen(str);
183 t.data = (unsigned char *)str;
186 if (ASN1_GENERALIZEDTIME_check(&t)) {
188 if (!ASN1_STRING_set((ASN1_STRING *)s, str, t.length))
190 s->type = V_ASN1_GENERALIZEDTIME;
197 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
200 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
203 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
204 time_t t, int offset_day,
211 ASN1_GENERALIZEDTIME *tmps = NULL;
214 tmps = ASN1_GENERALIZEDTIME_new();
220 ts = OPENSSL_gmtime(&t, &data);
224 if (offset_day || offset_sec) {
225 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
229 p = (char *)tmps->data;
230 if ((p == NULL) || ((size_t)tmps->length < len)) {
231 p = OPENSSL_malloc(len);
233 ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
236 OPENSSL_free(tmps->data);
237 tmps->data = (unsigned char *)p;
240 BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
241 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
243 tmps->length = strlen(p);
244 tmps->type = V_ASN1_GENERALIZEDTIME;
245 #ifdef CHARSET_EBCDIC_not
246 ebcdic2ascii(tmps->data, tmps->data, tmps->length);
251 ASN1_GENERALIZEDTIME_free(tmps);
255 const char *_asn1_mon[12] = {
256 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
257 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
260 int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
265 int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
270 v = (char *)tm->data;
276 for (i = 0; i < 12; i++)
277 if ((v[i] > '9') || (v[i] < '0'))
279 y = (v[0] - '0') * 1000 + (v[1] - '0') * 100
280 + (v[2] - '0') * 10 + (v[3] - '0');
281 M = (v[4] - '0') * 10 + (v[5] - '0');
282 if ((M > 12) || (M < 1))
284 d = (v[6] - '0') * 10 + (v[7] - '0');
285 h = (v[8] - '0') * 10 + (v[9] - '0');
286 m = (v[10] - '0') * 10 + (v[11] - '0');
287 if (tm->length >= 14 &&
288 (v[12] >= '0') && (v[12] <= '9') &&
289 (v[13] >= '0') && (v[13] <= '9')) {
290 s = (v[12] - '0') * 10 + (v[13] - '0');
291 /* Check for fractions of seconds. */
292 if (tm->length >= 15 && v[14] == '.') {
294 f = &v[14]; /* The decimal point. */
296 while (14 + f_len < l && f[f_len] >= '0' && f[f_len] <= '9')
301 if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
302 _asn1_mon[M - 1], d, h, m, s, f_len, f, y,
303 (gmt) ? " GMT" : "") <= 0)
308 BIO_write(bp, "Bad time value", 14);