a_utctm.c revision 331638
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#include "asn1_locl.h" 65 66#if 0 67int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp) 68{ 69# ifndef CHARSET_EBCDIC 70 return (i2d_ASN1_bytes((ASN1_STRING *)a, pp, 71 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL)); 72# else 73 /* KLUDGE! We convert to ascii before writing DER */ 74 int len; 75 char tmp[24]; 76 ASN1_STRING x = *(ASN1_STRING *)a; 77 78 len = x.length; 79 ebcdic2ascii(tmp, x.data, (len >= sizeof(tmp)) ? sizeof(tmp) : len); 80 x.data = tmp; 81 return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME, V_ASN1_UNIVERSAL); 82# endif 83} 84 85ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp, 86 long length) 87{ 88 ASN1_UTCTIME *ret = NULL; 89 90 ret = (ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length, 91 V_ASN1_UTCTIME, V_ASN1_UNIVERSAL); 92 if (ret == NULL) { 93 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ERR_R_NESTED_ASN1_ERROR); 94 return (NULL); 95 } 96# ifdef CHARSET_EBCDIC 97 ascii2ebcdic(ret->data, ret->data, ret->length); 98# endif 99 if (!ASN1_UTCTIME_check(ret)) { 100 ASN1err(ASN1_F_D2I_ASN1_UTCTIME, ASN1_R_INVALID_TIME_FORMAT); 101 goto err; 102 } 103 104 return (ret); 105 err: 106 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 107 M_ASN1_UTCTIME_free(ret); 108 return (NULL); 109} 110 111#endif 112 113int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d) 114{ 115 static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 }; 116 static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 }; 117 char *a; 118 int n, i, l, o; 119 120 if (d->type != V_ASN1_UTCTIME) 121 return (0); 122 l = d->length; 123 a = (char *)d->data; 124 o = 0; 125 126 if (l < 11) 127 goto err; 128 for (i = 0; i < 6; i++) { 129 if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { 130 i++; 131 if (tm) 132 tm->tm_sec = 0; 133 break; 134 } 135 if ((a[o] < '0') || (a[o] > '9')) 136 goto err; 137 n = a[o] - '0'; 138 if (++o > l) 139 goto err; 140 141 if ((a[o] < '0') || (a[o] > '9')) 142 goto err; 143 n = (n * 10) + a[o] - '0'; 144 if (++o > l) 145 goto err; 146 147 if ((n < min[i]) || (n > max[i])) 148 goto err; 149 if (tm) { 150 switch (i) { 151 case 0: 152 tm->tm_year = n < 50 ? n + 100 : n; 153 break; 154 case 1: 155 tm->tm_mon = n - 1; 156 break; 157 case 2: 158 tm->tm_mday = n; 159 break; 160 case 3: 161 tm->tm_hour = n; 162 break; 163 case 4: 164 tm->tm_min = n; 165 break; 166 case 5: 167 tm->tm_sec = n; 168 break; 169 } 170 } 171 } 172 if (a[o] == 'Z') 173 o++; 174 else if ((a[o] == '+') || (a[o] == '-')) { 175 int offsign = a[o] == '-' ? 1 : -1, offset = 0; 176 o++; 177 if (o + 4 > l) 178 goto err; 179 for (i = 6; i < 8; i++) { 180 if ((a[o] < '0') || (a[o] > '9')) 181 goto err; 182 n = a[o] - '0'; 183 o++; 184 if ((a[o] < '0') || (a[o] > '9')) 185 goto err; 186 n = (n * 10) + a[o] - '0'; 187 if ((n < min[i]) || (n > max[i])) 188 goto err; 189 if (tm) { 190 if (i == 6) 191 offset = n * 3600; 192 else if (i == 7) 193 offset += n * 60; 194 } 195 o++; 196 } 197 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 198 return 0; 199 } 200 return o == l; 201 err: 202 return 0; 203} 204 205int ASN1_UTCTIME_check(const ASN1_UTCTIME *d) 206{ 207 return asn1_utctime_to_tm(NULL, d); 208} 209 210int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) 211{ 212 ASN1_UTCTIME t; 213 214 t.type = V_ASN1_UTCTIME; 215 t.length = strlen(str); 216 t.data = (unsigned char *)str; 217 if (ASN1_UTCTIME_check(&t)) { 218 if (s != NULL) { 219 if (!ASN1_STRING_set((ASN1_STRING *)s, 220 (unsigned char *)str, t.length)) 221 return 0; 222 s->type = V_ASN1_UTCTIME; 223 } 224 return (1); 225 } else 226 return (0); 227} 228 229ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 230{ 231 return ASN1_UTCTIME_adj(s, t, 0, 0); 232} 233 234ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, 235 int offset_day, long offset_sec) 236{ 237 char *p; 238 struct tm *ts; 239 struct tm data; 240 size_t len = 20; 241 int free_s = 0; 242 243 if (s == NULL) { 244 free_s = 1; 245 s = M_ASN1_UTCTIME_new(); 246 } 247 if (s == NULL) 248 goto err; 249 250 ts = OPENSSL_gmtime(&t, &data); 251 if (ts == NULL) 252 goto err; 253 254 if (offset_day || offset_sec) { 255 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 256 goto err; 257 } 258 259 if ((ts->tm_year < 50) || (ts->tm_year >= 150)) 260 goto err; 261 262 p = (char *)s->data; 263 if ((p == NULL) || ((size_t)s->length < len)) { 264 p = OPENSSL_malloc(len); 265 if (p == NULL) { 266 ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE); 267 goto err; 268 } 269 if (s->data != NULL) 270 OPENSSL_free(s->data); 271 s->data = (unsigned char *)p; 272 } 273 274 BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100, 275 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, 276 ts->tm_sec); 277 s->length = strlen(p); 278 s->type = V_ASN1_UTCTIME; 279#ifdef CHARSET_EBCDIC_not 280 ebcdic2ascii(s->data, s->data, s->length); 281#endif 282 return (s); 283 err: 284 if (free_s && s) 285 M_ASN1_UTCTIME_free(s); 286 return NULL; 287} 288 289int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 290{ 291 struct tm stm, ttm; 292 int day, sec; 293 294 if (!asn1_utctime_to_tm(&stm, s)) 295 return -2; 296 297 if (!OPENSSL_gmtime(&t, &ttm)) 298 return -2; 299 300 if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm)) 301 return -2; 302 303 if (day > 0) 304 return 1; 305 if (day < 0) 306 return -1; 307 if (sec > 0) 308 return 1; 309 if (sec < 0) 310 return -1; 311 return 0; 312} 313 314#if 0 315time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 316{ 317 struct tm tm; 318 int offset; 319 320 memset(&tm, '\0', sizeof(tm)); 321 322# define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 323 tm.tm_year = g2(s->data); 324 if (tm.tm_year < 50) 325 tm.tm_year += 100; 326 tm.tm_mon = g2(s->data + 2) - 1; 327 tm.tm_mday = g2(s->data + 4); 328 tm.tm_hour = g2(s->data + 6); 329 tm.tm_min = g2(s->data + 8); 330 tm.tm_sec = g2(s->data + 10); 331 if (s->data[12] == 'Z') 332 offset = 0; 333 else { 334 offset = g2(s->data + 13) * 60 + g2(s->data + 15); 335 if (s->data[12] == '-') 336 offset = -offset; 337 } 338# undef g2 339 340 /* 341 * FIXME: mktime assumes the current timezone 342 * instead of UTC, and unless we rewrite OpenSSL 343 * in Lisp we cannot locally change the timezone 344 * without possibly interfering with other parts 345 * of the program. timegm, which uses UTC, is 346 * non-standard. 347 * Also time_t is inappropriate for general 348 * UTC times because it may a 32 bit type. 349 */ 350 return mktime(&tm) - offset * 60; 351} 352#endif 353