1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@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@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@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@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 <openssl/err.h> 60#include <openssl/mem.h> 61#include <openssl/time_support.h> 62 63 64int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d) 65 { 66 static const int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0}; 67 static const int max[9]={99, 99,12,31,23,59,59,12,59}; 68 char *a; 69 int n,i,l,o; 70 71 if (d->type != V_ASN1_GENERALIZEDTIME) return(0); 72 l=d->length; 73 a=(char *)d->data; 74 o=0; 75 /* GENERALIZEDTIME is similar to UTCTIME except the year is 76 * represented as YYYY. This stuff treats everything as a two digit 77 * field so make first two fields 00 to 99 78 */ 79 if (l < 13) goto err; 80 for (i=0; i<7; i++) 81 { 82 if ((i == 6) && ((a[o] == 'Z') || 83 (a[o] == '+') || (a[o] == '-'))) 84 { 85 i++; 86 if (tm) 87 tm->tm_sec = 0; 88 break; 89 } 90 if ((a[o] < '0') || (a[o] > '9')) goto err; 91 n= a[o]-'0'; 92 if (++o > l) goto err; 93 94 if ((a[o] < '0') || (a[o] > '9')) goto err; 95 n=(n*10)+ a[o]-'0'; 96 if (++o > l) goto err; 97 98 if ((n < min[i]) || (n > max[i])) goto err; 99 if (tm) 100 { 101 switch(i) 102 { 103 case 0: 104 tm->tm_year = n * 100 - 1900; 105 break; 106 case 1: 107 tm->tm_year += n; 108 break; 109 case 2: 110 tm->tm_mon = n - 1; 111 break; 112 case 3: 113 tm->tm_mday = n; 114 break; 115 case 4: 116 tm->tm_hour = n; 117 break; 118 case 5: 119 tm->tm_min = n; 120 break; 121 case 6: 122 tm->tm_sec = n; 123 break; 124 } 125 } 126 } 127 /* Optional fractional seconds: decimal point followed by one 128 * or more digits. 129 */ 130 if (a[o] == '.') 131 { 132 if (++o > l) goto err; 133 i = o; 134 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l)) 135 o++; 136 /* Must have at least one digit after decimal point */ 137 if (i == o) goto err; 138 } 139 140 if (a[o] == 'Z') 141 o++; 142 else if ((a[o] == '+') || (a[o] == '-')) 143 { 144 int offsign = a[o] == '-' ? -1 : 1, offset = 0; 145 o++; 146 if (o+4 > l) goto err; 147 for (i=7; i<9; i++) 148 { 149 if ((a[o] < '0') || (a[o] > '9')) goto err; 150 n= a[o]-'0'; 151 o++; 152 if ((a[o] < '0') || (a[o] > '9')) goto err; 153 n=(n*10)+ a[o]-'0'; 154 if ((n < min[i]) || (n > max[i])) goto err; 155 if (tm) 156 { 157 if (i == 7) 158 offset = n * 3600; 159 else if (i == 8) 160 offset += n * 60; 161 } 162 o++; 163 } 164 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 165 return 0; 166 } 167 else if (a[o]) 168 { 169 /* Missing time zone information. */ 170 goto err; 171 } 172 return(o == l); 173err: 174 return(0); 175 } 176 177int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d) 178 { 179 return asn1_generalizedtime_to_tm(NULL, d); 180 } 181 182int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str) 183 { 184 ASN1_GENERALIZEDTIME t; 185 186 t.type=V_ASN1_GENERALIZEDTIME; 187 t.length=strlen(str); 188 t.data=(unsigned char *)str; 189 if (ASN1_GENERALIZEDTIME_check(&t)) 190 { 191 if (s != NULL) 192 { 193 if (!ASN1_STRING_set((ASN1_STRING *)s, 194 (unsigned char *)str,t.length)) 195 return 0; 196 s->type=V_ASN1_GENERALIZEDTIME; 197 } 198 return(1); 199 } 200 else 201 return(0); 202 } 203 204ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, 205 time_t t) 206 { 207 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0); 208 } 209 210ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, 211 time_t t, int offset_day, long offset_sec) 212 { 213 char *p; 214 struct tm *ts; 215 struct tm data; 216 size_t len = 20; 217 218 if (s == NULL) 219 s=M_ASN1_GENERALIZEDTIME_new(); 220 if (s == NULL) 221 return(NULL); 222 223 ts=OPENSSL_gmtime(&t, &data); 224 if (ts == NULL) 225 return(NULL); 226 227 if (offset_day || offset_sec) 228 { 229 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 230 return NULL; 231 } 232 233 p=(char *)s->data; 234 if ((p == NULL) || ((size_t)s->length < len)) 235 { 236 p=OPENSSL_malloc(len); 237 if (p == NULL) 238 { 239 OPENSSL_PUT_ERROR(ASN1, ASN1_GENERALIZEDTIME_adj, ERR_R_MALLOC_FAILURE); 240 return(NULL); 241 } 242 if (s->data != NULL) 243 OPENSSL_free(s->data); 244 s->data=(unsigned char *)p; 245 } 246 247 BIO_snprintf(p,len,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900, 248 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 249 s->length=strlen(p); 250 s->type=V_ASN1_GENERALIZEDTIME; 251 return(s); 252 } 253