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 #include <openssl/time_support.h> 65 66 67 #if 0 68 int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp) 69 { 70 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 71 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL)); 72 } 73 74 75 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp, 76 long length) 77 { 78 ASN1_UTCTIME *ret=NULL; 79 80 ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length, 81 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL); 82 if (ret == NULL) 83 { 84 OPENSSL_PUT_ERROR(ASN1, ERR_R_NESTED_ASN1_ERROR); 85 return(NULL); 86 } 87 if (!ASN1_UTCTIME_check(ret)) 88 { 89 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_TIME_FORMAT); 90 goto err; 91 } 92 93 return(ret); 94 err: 95 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 96 M_ASN1_UTCTIME_free(ret); 97 return(NULL); 98 } 99 100 #endif 101 102 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d) 103 { 104 static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0}; 105 static const int max[8]={99,12,31,23,59,59,12,59}; 106 char *a; 107 int n,i,l,o; 108 109 if (d->type != V_ASN1_UTCTIME) return(0); 110 l=d->length; 111 a=(char *)d->data; 112 o=0; 113 114 if (l < 11) goto err; 115 for (i=0; i<6; i++) 116 { 117 if ((i == 5) && ((a[o] == 'Z') || 118 (a[o] == '+') || (a[o] == '-'))) 119 { 120 i++; 121 if (tm) 122 tm->tm_sec = 0; 123 break; 124 } 125 if ((a[o] < '0') || (a[o] > '9')) goto err; 126 n= a[o]-'0'; 127 if (++o > l) goto err; 128 129 if ((a[o] < '0') || (a[o] > '9')) goto err; 130 n=(n*10)+ a[o]-'0'; 131 if (++o > l) goto err; 132 133 if ((n < min[i]) || (n > max[i])) goto err; 134 if (tm) 135 { 136 switch(i) 137 { 138 case 0: 139 tm->tm_year = n < 50 ? n + 100 : n; 140 break; 141 case 1: 142 tm->tm_mon = n - 1; 143 break; 144 case 2: 145 tm->tm_mday = n; 146 break; 147 case 3: 148 tm->tm_hour = n; 149 break; 150 case 4: 151 tm->tm_min = n; 152 break; 153 case 5: 154 tm->tm_sec = n; 155 break; 156 } 157 } 158 } 159 if (a[o] == 'Z') 160 o++; 161 else if ((a[o] == '+') || (a[o] == '-')) 162 { 163 int offsign = a[o] == '-' ? -1 : 1, offset = 0; 164 o++; 165 if (o+4 > l) goto err; 166 for (i=6; i<8; i++) 167 { 168 if ((a[o] < '0') || (a[o] > '9')) goto err; 169 n= a[o]-'0'; 170 o++; 171 if ((a[o] < '0') || (a[o] > '9')) goto err; 172 n=(n*10)+ a[o]-'0'; 173 if ((n < min[i]) || (n > max[i])) goto err; 174 if (tm) 175 { 176 if (i == 6) 177 offset = n * 3600; 178 else if (i == 7) 179 offset += n * 60; 180 } 181 o++; 182 } 183 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 184 return 0; 185 } 186 return o == l; 187 err: 188 return 0; 189 } 190 191 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d) 192 { 193 return asn1_utctime_to_tm(NULL, d); 194 } 195 196 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) 197 { 198 ASN1_UTCTIME t; 199 200 t.type=V_ASN1_UTCTIME; 201 t.length=strlen(str); 202 t.data=(unsigned char *)str; 203 if (ASN1_UTCTIME_check(&t)) 204 { 205 if (s != NULL) 206 { 207 if (!ASN1_STRING_set((ASN1_STRING *)s, 208 (unsigned char *)str,t.length)) 209 return 0; 210 s->type = V_ASN1_UTCTIME; 211 } 212 return(1); 213 } 214 else 215 return(0); 216 } 217 218 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 219 { 220 return ASN1_UTCTIME_adj(s, t, 0, 0); 221 } 222 223 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, 224 int offset_day, long offset_sec) 225 { 226 char *p; 227 struct tm *ts; 228 struct tm data; 229 size_t len = 20; 230 int free_s = 0; 231 232 if (s == NULL) 233 { 234 free_s = 1; 235 s=M_ASN1_UTCTIME_new(); 236 } 237 if (s == NULL) 238 goto err; 239 240 241 ts=OPENSSL_gmtime(&t, &data); 242 if (ts == NULL) 243 goto err; 244 245 if (offset_day || offset_sec) 246 { 247 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 248 goto err; 249 } 250 251 if((ts->tm_year < 50) || (ts->tm_year >= 150)) 252 goto err; 253 254 p=(char *)s->data; 255 if ((p == NULL) || ((size_t)s->length < len)) 256 { 257 p=OPENSSL_malloc(len); 258 if (p == NULL) 259 { 260 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 261 goto err; 262 } 263 if (s->data != NULL) 264 OPENSSL_free(s->data); 265 s->data=(unsigned char *)p; 266 } 267 268 BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100, 269 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 270 s->length=strlen(p); 271 s->type=V_ASN1_UTCTIME; 272 return(s); 273 err: 274 if (free_s && s) 275 M_ASN1_UTCTIME_free(s); 276 return NULL; 277 } 278 279 280 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 281 { 282 struct tm stm, ttm; 283 int day, sec; 284 285 if (!asn1_utctime_to_tm(&stm, s)) 286 return -2; 287 288 if (!OPENSSL_gmtime(&t, &ttm)) 289 return -2; 290 291 if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm)) 292 return -2; 293 294 if (day > 0) 295 return 1; 296 if (day < 0) 297 return -1; 298 if (sec > 0) 299 return 1; 300 if (sec < 0) 301 return -1; 302 return 0; 303 } 304 305 306 #if 0 307 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 308 { 309 struct tm tm; 310 int offset; 311 312 memset(&tm,'\0',sizeof tm); 313 314 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 315 tm.tm_year=g2(s->data); 316 if(tm.tm_year < 50) 317 tm.tm_year+=100; 318 tm.tm_mon=g2(s->data+2)-1; 319 tm.tm_mday=g2(s->data+4); 320 tm.tm_hour=g2(s->data+6); 321 tm.tm_min=g2(s->data+8); 322 tm.tm_sec=g2(s->data+10); 323 if(s->data[12] == 'Z') 324 offset=0; 325 else 326 { 327 offset=g2(s->data+13)*60+g2(s->data+15); 328 if(s->data[12] == '-') 329 offset= -offset; 330 } 331 #undef g2 332 333 return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone 334 * instead of UTC, and unless we rewrite OpenSSL 335 * in Lisp we cannot locally change the timezone 336 * without possibly interfering with other parts 337 * of the program. timegm, which uses UTC, is 338 * non-standard. 339 * Also time_t is inappropriate for general 340 * UTC times because it may a 32 bit type. */ 341 } 342 #endif 343
