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 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d) 68 { 69 static const int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0}; 70 static const int max[9]={99, 99,12,31,23,59,59,12,59}; 71 char *a; 72 int n,i,l,o; 73 74 if (d->type != V_ASN1_GENERALIZEDTIME) return(0); 75 l=d->length; 76 a=(char *)d->data; 77 o=0; 78 /* GENERALIZEDTIME is similar to UTCTIME except the year is 79 * represented as YYYY. This stuff treats everything as a two digit 80 * field so make first two fields 00 to 99 81 */ 82 if (l < 13) goto err; 83 for (i=0; i<7; i++) 84 { 85 if ((i == 6) && ((a[o] == 'Z') || 86 (a[o] == '+') || (a[o] == '-'))) 87 { 88 i++; 89 if (tm) 90 tm->tm_sec = 0; 91 break; 92 } 93 if ((a[o] < '0') || (a[o] > '9')) goto err; 94 n= a[o]-'0'; 95 if (++o > l) goto err; 96 97 if ((a[o] < '0') || (a[o] > '9')) goto err; 98 n=(n*10)+ a[o]-'0'; 99 if (++o > l) goto err; 100 101 if ((n < min[i]) || (n > max[i])) goto err; 102 if (tm) 103 { 104 switch(i) 105 { 106 case 0: 107 tm->tm_year = n * 100 - 1900; 108 break; 109 case 1: 110 tm->tm_year += n; 111 break; 112 case 2: 113 tm->tm_mon = n - 1; 114 break; 115 case 3: 116 tm->tm_mday = n; 117 break; 118 case 4: 119 tm->tm_hour = n; 120 break; 121 case 5: 122 tm->tm_min = n; 123 break; 124 case 6: 125 tm->tm_sec = n; 126 break; 127 } 128 } 129 } 130 /* Optional fractional seconds: decimal point followed by one 131 * or more digits. 132 */ 133 if (a[o] == '.') 134 { 135 if (++o > l) goto err; 136 i = o; 137 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l)) 138 o++; 139 /* Must have at least one digit after decimal point */ 140 if (i == o) goto err; 141 } 142 143 if (a[o] == 'Z') 144 o++; 145 else if ((a[o] == '+') || (a[o] == '-')) 146 { 147 int offsign = a[o] == '-' ? -1 : 1, offset = 0; 148 o++; 149 if (o+4 > l) goto err; 150 for (i=7; i<9; i++) 151 { 152 if ((a[o] < '0') || (a[o] > '9')) goto err; 153 n= a[o]-'0'; 154 o++; 155 if ((a[o] < '0') || (a[o] > '9')) goto err; 156 n=(n*10)+ a[o]-'0'; 157 if ((n < min[i]) || (n > max[i])) goto err; 158 if (tm) 159 { 160 if (i == 7) 161 offset = n * 3600; 162 else if (i == 8) 163 offset += n * 60; 164 } 165 o++; 166 } 167 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 168 return 0; 169 } 170 else if (a[o]) 171 { 172 /* Missing time zone information. */ 173 goto err; 174 } 175 return(o == l); 176 err: 177 return(0); 178 } 179 180 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d) 181 { 182 return asn1_generalizedtime_to_tm(NULL, d); 183 } 184 185 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str) 186 { 187 ASN1_GENERALIZEDTIME t; 188 189 t.type=V_ASN1_GENERALIZEDTIME; 190 t.length=strlen(str); 191 t.data=(unsigned char *)str; 192 if (ASN1_GENERALIZEDTIME_check(&t)) 193 { 194 if (s != NULL) 195 { 196 if (!ASN1_STRING_set((ASN1_STRING *)s, 197 (unsigned char *)str,t.length)) 198 return 0; 199 s->type=V_ASN1_GENERALIZEDTIME; 200 } 201 return(1); 202 } 203 else 204 return(0); 205 } 206 207 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, 208 time_t t) 209 { 210 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0); 211 } 212 213 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, 214 time_t t, int offset_day, long offset_sec) 215 { 216 char *p; 217 struct tm *ts; 218 struct tm data; 219 size_t len = 20; 220 221 if (s == NULL) 222 s=M_ASN1_GENERALIZEDTIME_new(); 223 if (s == NULL) 224 return(NULL); 225 226 ts=OPENSSL_gmtime(&t, &data); 227 if (ts == NULL) 228 return(NULL); 229 230 if (offset_day || offset_sec) 231 { 232 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 233 return NULL; 234 } 235 236 p=(char *)s->data; 237 if ((p == NULL) || ((size_t)s->length < len)) 238 { 239 p=OPENSSL_malloc(len); 240 if (p == NULL) 241 { 242 OPENSSL_PUT_ERROR(ASN1, ASN1_GENERALIZEDTIME_adj, ERR_R_MALLOC_FAILURE); 243 return(NULL); 244 } 245 if (s->data != NULL) 246 OPENSSL_free(s->data); 247 s->data=(unsigned char *)p; 248 } 249 250 BIO_snprintf(p,len,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900, 251 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 252 s->length=strlen(p); 253 s->type=V_ASN1_GENERALIZEDTIME; 254 return(s); 255 } 256
