1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 65 #include "asn1_locl.h" 66 67 68 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d) 69 { 70 static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 }; 71 static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 }; 72 char *a; 73 int n, i, l, o; 74 75 if (d->type != V_ASN1_UTCTIME) 76 return (0); 77 l = d->length; 78 a = (char *)d->data; 79 o = 0; 80 81 if (l < 11) 82 goto err; 83 for (i = 0; i < 6; i++) { 84 if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { 85 i++; 86 if (tm) 87 tm->tm_sec = 0; 88 break; 89 } 90 if ((a[o] < '0') || (a[o] > '9')) 91 goto err; 92 n = a[o] - '0'; 93 if (++o > l) 94 goto err; 95 96 if ((a[o] < '0') || (a[o] > '9')) 97 goto err; 98 n = (n * 10) + a[o] - '0'; 99 if (++o > l) 100 goto err; 101 102 if ((n < min[i]) || (n > max[i])) 103 goto err; 104 if (tm) { 105 switch (i) { 106 case 0: 107 tm->tm_year = n < 50 ? n + 100 : n; 108 break; 109 case 1: 110 tm->tm_mon = n - 1; 111 break; 112 case 2: 113 tm->tm_mday = n; 114 break; 115 case 3: 116 tm->tm_hour = n; 117 break; 118 case 4: 119 tm->tm_min = n; 120 break; 121 case 5: 122 tm->tm_sec = n; 123 break; 124 } 125 } 126 } 127 if (a[o] == 'Z') 128 o++; 129 else if ((a[o] == '+') || (a[o] == '-')) { 130 int offsign = a[o] == '-' ? -1 : 1, offset = 0; 131 o++; 132 if (o + 4 > l) 133 goto err; 134 for (i = 6; i < 8; i++) { 135 if ((a[o] < '0') || (a[o] > '9')) 136 goto err; 137 n = a[o] - '0'; 138 o++; 139 if ((a[o] < '0') || (a[o] > '9')) 140 goto err; 141 n = (n * 10) + a[o] - '0'; 142 if ((n < min[i]) || (n > max[i])) 143 goto err; 144 if (tm) { 145 if (i == 6) 146 offset = n * 3600; 147 else if (i == 7) 148 offset += n * 60; 149 } 150 o++; 151 } 152 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 153 return 0; 154 } 155 return o == l; 156 err: 157 return 0; 158 } 159 160 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d) 161 { 162 return asn1_utctime_to_tm(NULL, d); 163 } 164 165 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) 166 { 167 ASN1_UTCTIME t; 168 169 t.type = V_ASN1_UTCTIME; 170 t.length = strlen(str); 171 t.data = (unsigned char *)str; 172 if (ASN1_UTCTIME_check(&t)) { 173 if (s != NULL) { 174 if (!ASN1_STRING_set((ASN1_STRING *)s, 175 (unsigned char *)str, t.length)) 176 return 0; 177 s->type = V_ASN1_UTCTIME; 178 } 179 return (1); 180 } else 181 return (0); 182 } 183 184 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 185 { 186 return ASN1_UTCTIME_adj(s, t, 0, 0); 187 } 188 189 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, 190 int offset_day, long offset_sec) 191 { 192 char *p; 193 struct tm *ts; 194 struct tm data; 195 size_t len = 20; 196 int free_s = 0; 197 198 if (s == NULL) { 199 free_s = 1; 200 s = M_ASN1_UTCTIME_new(); 201 } 202 if (s == NULL) 203 goto err; 204 205 ts = OPENSSL_gmtime(&t, &data); 206 if (ts == NULL) 207 goto err; 208 209 if (offset_day || offset_sec) { 210 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 211 goto err; 212 } 213 214 if ((ts->tm_year < 50) || (ts->tm_year >= 150)) 215 goto err; 216 217 p = (char *)s->data; 218 if ((p == NULL) || ((size_t)s->length < len)) { 219 p = OPENSSL_malloc(len); 220 if (p == NULL) { 221 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 222 goto err; 223 } 224 if (s->data != NULL) 225 OPENSSL_free(s->data); 226 s->data = (unsigned char *)p; 227 } 228 229 BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100, 230 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, 231 ts->tm_sec); 232 s->length = strlen(p); 233 s->type = V_ASN1_UTCTIME; 234 return (s); 235 err: 236 if (free_s && s) 237 M_ASN1_UTCTIME_free(s); 238 return NULL; 239 } 240 241 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 242 { 243 struct tm stm, ttm; 244 int day, sec; 245 246 if (!asn1_utctime_to_tm(&stm, s)) 247 return -2; 248 249 if (!OPENSSL_gmtime(&t, &ttm)) 250 return -2; 251 252 if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm)) 253 return -2; 254 255 if (day > 0) 256 return 1; 257 if (day < 0) 258 return -1; 259 if (sec > 0) 260 return 1; 261 if (sec < 0) 262 return -1; 263 return 0; 264 } 265 266 #if 0 267 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 268 { 269 struct tm tm; 270 int offset; 271 272 OPENSSL_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 return mktime(&tm) - offset * 60; /* FIXME: mktime assumes the current 293 * timezone instead of UTC, and unless 294 * we rewrite OpenSSL in Lisp we cannot 295 * locally change the timezone without 296 * possibly interfering with other 297 * parts of the program. timegm, which 298 * uses UTC, is non-standard. Also 299 * time_t is inappropriate for general 300 * UTC times because it may a 32 bit 301 * type. */ 302 } 303 #endif 304
