1 /* crypto/asn1/a_utctm.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 66 int 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 84 85 ASN1_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 { 94 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR); 95 return(NULL); 96 } 97 #ifdef CHARSET_EBCDIC 98 ascii2ebcdic(ret->data, ret->data, ret->length); 99 #endif 100 if (!ASN1_UTCTIME_check(ret)) 101 { 102 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT); 103 goto err; 104 } 105 106 return(ret); 107 err: 108 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 109 M_ASN1_UTCTIME_free(ret); 110 return(NULL); 111 } 112 113 #endif 114 115 int ASN1_UTCTIME_check(ASN1_UTCTIME *d) 116 { 117 static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0}; 118 static const int max[8]={99,12,31,23,59,59,12,59}; 119 char *a; 120 int n,i,l,o; 121 122 if (d->type != V_ASN1_UTCTIME) return(0); 123 l=d->length; 124 a=(char *)d->data; 125 o=0; 126 127 if (l < 11) goto err; 128 for (i=0; i<6; i++) 129 { 130 if ((i == 5) && ((a[o] == 'Z') || 131 (a[o] == '+') || (a[o] == '-'))) 132 { i++; break; } 133 if ((a[o] < '0') || (a[o] > '9')) goto err; 134 n= a[o]-'0'; 135 if (++o > l) goto err; 136 137 if ((a[o] < '0') || (a[o] > '9')) goto err; 138 n=(n*10)+ a[o]-'0'; 139 if (++o > l) goto err; 140 141 if ((n < min[i]) || (n > max[i])) goto err; 142 } 143 if (a[o] == 'Z') 144 o++; 145 else if ((a[o] == '+') || (a[o] == '-')) 146 { 147 o++; 148 if (o+4 > l) goto err; 149 for (i=6; i<8; i++) 150 { 151 if ((a[o] < '0') || (a[o] > '9')) goto err; 152 n= a[o]-'0'; 153 o++; 154 if ((a[o] < '0') || (a[o] > '9')) goto err; 155 n=(n*10)+ a[o]-'0'; 156 if ((n < min[i]) || (n > max[i])) goto err; 157 o++; 158 } 159 } 160 return(o == l); 161 err: 162 return(0); 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 { 174 if (s != NULL) 175 { 176 if (!ASN1_STRING_set((ASN1_STRING *)s, 177 (unsigned char *)str,t.length)) 178 return 0; 179 s->type = V_ASN1_UTCTIME; 180 } 181 return(1); 182 } 183 else 184 return(0); 185 } 186 187 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 188 { 189 return ASN1_UTCTIME_adj(s, t, 0, 0); 190 } 191 192 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, 193 int offset_day, long offset_sec) 194 { 195 char *p; 196 struct tm *ts; 197 struct tm data; 198 size_t len = 20; 199 200 if (s == NULL) 201 s=M_ASN1_UTCTIME_new(); 202 if (s == NULL) 203 return(NULL); 204 205 ts=OPENSSL_gmtime(&t, &data); 206 if (ts == NULL) 207 return(NULL); 208 209 if (offset_day || offset_sec) 210 { 211 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 212 return NULL; 213 } 214 215 if((ts->tm_year < 50) || (ts->tm_year >= 150)) 216 return NULL; 217 218 p=(char *)s->data; 219 if ((p == NULL) || ((size_t)s->length < len)) 220 { 221 p=OPENSSL_malloc(len); 222 if (p == NULL) 223 { 224 ASN1err(ASN1_F_ASN1_UTCTIME_ADJ,ERR_R_MALLOC_FAILURE); 225 return(NULL); 226 } 227 if (s->data != NULL) 228 OPENSSL_free(s->data); 229 s->data=(unsigned char *)p; 230 } 231 232 BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100, 233 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 234 s->length=strlen(p); 235 s->type=V_ASN1_UTCTIME; 236 #ifdef CHARSET_EBCDIC_not 237 ebcdic2ascii(s->data, s->data, s->length); 238 #endif 239 return(s); 240 } 241 242 243 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 244 { 245 struct tm *tm; 246 struct tm data; 247 int offset; 248 int year; 249 250 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 251 252 if (s->data[12] == 'Z') 253 offset=0; 254 else 255 { 256 offset = g2(s->data+13)*60+g2(s->data+15); 257 if (s->data[12] == '-') 258 offset = -offset; 259 } 260 261 t -= offset*60; /* FIXME: may overflow in extreme cases */ 262 263 tm = OPENSSL_gmtime(&t, &data); 264 265 #define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1 266 year = g2(s->data); 267 if (year < 50) 268 year += 100; 269 return_cmp(year, tm->tm_year); 270 return_cmp(g2(s->data+2) - 1, tm->tm_mon); 271 return_cmp(g2(s->data+4), tm->tm_mday); 272 return_cmp(g2(s->data+6), tm->tm_hour); 273 return_cmp(g2(s->data+8), tm->tm_min); 274 return_cmp(g2(s->data+10), tm->tm_sec); 275 #undef g2 276 #undef return_cmp 277 278 return 0; 279 } 280 281 282 #if 0 283 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 284 { 285 struct tm tm; 286 int offset; 287 288 memset(&tm,'\0',sizeof tm); 289 290 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 291 tm.tm_year=g2(s->data); 292 if(tm.tm_year < 50) 293 tm.tm_year+=100; 294 tm.tm_mon=g2(s->data+2)-1; 295 tm.tm_mday=g2(s->data+4); 296 tm.tm_hour=g2(s->data+6); 297 tm.tm_min=g2(s->data+8); 298 tm.tm_sec=g2(s->data+10); 299 if(s->data[12] == 'Z') 300 offset=0; 301 else 302 { 303 offset=g2(s->data+13)*60+g2(s->data+15); 304 if(s->data[12] == '-') 305 offset= -offset; 306 } 307 #undef g2 308 309 return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone 310 * instead of UTC, and unless we rewrite OpenSSL 311 * in Lisp we cannot locally change the timezone 312 * without possibly interfering with other parts 313 * of the program. timegm, which uses UTC, is 314 * non-standard. 315 * Also time_t is inappropriate for general 316 * UTC times because it may a 32 bit type. */ 317 } 318 #endif 319
