a_utctm.c revision 296465
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 "o_time.h" 63#include <openssl/asn1.h> 64 65#if 0 66int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp) 67{ 68# ifndef CHARSET_EBCDIC 69 return (i2d_ASN1_bytes((ASN1_STRING *)a, pp, 70 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL)); 71# else 72 /* KLUDGE! We convert to ascii before writing DER */ 73 int len; 74 char tmp[24]; 75 ASN1_STRING x = *(ASN1_STRING *)a; 76 77 len = x.length; 78 ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len); 79 x.data = tmp; 80 return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME, V_ASN1_UNIVERSAL); 81# endif 82} 83 84ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp, 85 long length) 86{ 87 ASN1_UTCTIME *ret = NULL; 88 89 ret = (ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length, 90 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL); 91 if (ret == NULL) { 92 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ERR_R_NESTED_ASN1_ERROR); 93 return (NULL); 94 } 95# ifdef CHARSET_EBCDIC 96 ascii2ebcdic(ret->data, ret->data, ret->length); 97# endif 98 if (!ASN1_UTCTIME_check(ret)) { 99 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ASN1_R_INVALID_TIME_FORMAT); 100 goto err; 101 } 102 103 return (ret); 104 err: 105 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 106 M_ASN1_UTCTIME_free(ret); 107 return (NULL); 108} 109 110#endif 111 112int ASN1_UTCTIME_check(ASN1_UTCTIME *d) 113{ 114 static int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 }; 115 static int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 }; 116 char *a; 117 int n, i, l, o; 118 119 if (d->type != V_ASN1_UTCTIME) 120 return (0); 121 l = d->length; 122 a = (char *)d->data; 123 o = 0; 124 125 if (l < 11) 126 goto err; 127 for (i = 0; i < 6; i++) { 128 if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { 129 i++; 130 break; 131 } 132 if ((a[o] < '0') || (a[o] > '9')) 133 goto err; 134 n = a[o] - '0'; 135 if (++o > l) 136 goto err; 137 138 if ((a[o] < '0') || (a[o] > '9')) 139 goto err; 140 n = (n * 10) + a[o] - '0'; 141 if (++o > l) 142 goto err; 143 144 if ((n < min[i]) || (n > max[i])) 145 goto err; 146 } 147 if (a[o] == 'Z') 148 o++; 149 else if ((a[o] == '+') || (a[o] == '-')) { 150 o++; 151 if (o + 4 > l) 152 goto err; 153 for (i = 6; i < 8; i++) { 154 if ((a[o] < '0') || (a[o] > '9')) 155 goto err; 156 n = a[o] - '0'; 157 o++; 158 if ((a[o] < '0') || (a[o] > '9')) 159 goto err; 160 n = (n * 10) + a[o] - '0'; 161 if ((n < min[i]) || (n > max[i])) 162 goto err; 163 o++; 164 } 165 } 166 return (o == l); 167 err: 168 return (0); 169} 170 171int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) 172{ 173 ASN1_UTCTIME t; 174 175 t.type = V_ASN1_UTCTIME; 176 t.length = strlen(str); 177 t.data = (unsigned char *)str; 178 if (ASN1_UTCTIME_check(&t)) { 179 if (s != NULL) { 180 if (!ASN1_STRING_set((ASN1_STRING *)s, 181 (unsigned char *)str, t.length)) 182 return 0; 183 s->type = V_ASN1_UTCTIME; 184 } 185 return (1); 186 } else 187 return (0); 188} 189 190ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 191{ 192 char *p; 193 struct tm *ts; 194 struct tm data; 195 size_t len = 20; 196 197 if (s == NULL) 198 s = M_ASN1_UTCTIME_new(); 199 if (s == NULL) 200 return (NULL); 201 202 ts = OPENSSL_gmtime(&t, &data); 203 if (ts == NULL) 204 return (NULL); 205 206 p = (char *)s->data; 207 if ((p == NULL) || ((size_t)s->length < len)) { 208 p = OPENSSL_malloc(len); 209 if (p == NULL) { 210 ASN1err(ASN1_F_ASN1_UTCTIME_SET, ERR_R_MALLOC_FAILURE); 211 return (NULL); 212 } 213 if (s->data != NULL) 214 OPENSSL_free(s->data); 215 s->data = (unsigned char *)p; 216 } 217 218 BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100, 219 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, 220 ts->tm_sec); 221 s->length = strlen(p); 222 s->type = V_ASN1_UTCTIME; 223#ifdef CHARSET_EBCDIC_not 224 ebcdic2ascii(s->data, s->data, s->length); 225#endif 226 return (s); 227} 228 229int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 230{ 231 struct tm *tm; 232 struct tm data; 233 int offset; 234 int year; 235 236#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 237 238 if (s->data[12] == 'Z') 239 offset = 0; 240 else { 241 offset = g2(s->data + 13) * 60 + g2(s->data + 15); 242 if (s->data[12] == '-') 243 offset = -offset; 244 } 245 246 t -= offset * 60; /* FIXME: may overflow in extreme cases */ 247 248 tm = OPENSSL_gmtime(&t, &data); 249 250#define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1 251 year = g2(s->data); 252 if (year < 50) 253 year += 100; 254 return_cmp(year, tm->tm_year); 255 return_cmp(g2(s->data + 2) - 1, tm->tm_mon); 256 return_cmp(g2(s->data + 4), tm->tm_mday); 257 return_cmp(g2(s->data + 6), tm->tm_hour); 258 return_cmp(g2(s->data + 8), tm->tm_min); 259 return_cmp(g2(s->data + 10), tm->tm_sec); 260#undef g2 261#undef return_cmp 262 263 return 0; 264} 265 266#if 0 267time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 268{ 269 struct tm tm; 270 int offset; 271 272 memset(&tm, '\0', sizeof tm); 273 274# define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 275 tm.tm_year = g2(s->data); 276 if (tm.tm_year < 50) 277 tm.tm_year += 100; 278 tm.tm_mon = g2(s->data + 2) - 1; 279 tm.tm_mday = g2(s->data + 4); 280 tm.tm_hour = g2(s->data + 6); 281 tm.tm_min = g2(s->data + 8); 282 tm.tm_sec = g2(s->data + 10); 283 if (s->data[12] == 'Z') 284 offset = 0; 285 else { 286 offset = g2(s->data + 13) * 60 + g2(s->data + 15); 287 if (s->data[12] == '-') 288 offset = -offset; 289 } 290# undef g2 291 292 /* 293 * FIXME: mktime assumes the current timezone 294 * instead of UTC, and unless we rewrite OpenSSL 295 * in Lisp we cannot locally change the timezone 296 * without possibly interfering with other parts 297 * of the program. timegm, which uses UTC, is 298 * non-standard. 299 * Also time_t is inappropriate for general 300 * UTC times because it may a 32 bit type. 301 */ 302 return mktime(&tm) - offset * 60; 303} 304#endif 305