a_gentm.c revision 100928
1/* crypto/asn1/a_gentm.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@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@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@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@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/* GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME */ 60 61#include <stdio.h> 62#include <time.h> 63#include "cryptlib.h" 64#include <openssl/asn1.h> 65 66ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_new(void) 67{ return M_ASN1_GENERALIZEDTIME_new(); } 68 69void ASN1_GENERALIZEDTIME_free(ASN1_GENERALIZEDTIME *x) 70{ M_ASN1_GENERALIZEDTIME_free(x); } 71 72int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp) 73 { 74#ifdef CHARSET_EBCDIC 75 /* KLUDGE! We convert to ascii before writing DER */ 76 int len; 77 char tmp[24]; 78 ASN1_STRING tmpstr = *(ASN1_STRING *)a; 79 80 len = tmpstr.length; 81 ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len); 82 tmpstr.data = tmp; 83 84 a = (ASN1_GENERALIZEDTIME *) &tmpstr; 85#endif 86 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 87 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL)); 88 } 89 90 91ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a, 92 unsigned char **pp, long length) 93 { 94 ASN1_GENERALIZEDTIME *ret=NULL; 95 96 ret=(ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length, 97 V_ASN1_GENERALIZEDTIME,V_ASN1_UNIVERSAL); 98 if (ret == NULL) 99 { 100 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ERR_R_NESTED_ASN1_ERROR); 101 return(NULL); 102 } 103#ifdef CHARSET_EBCDIC 104 ascii2ebcdic(ret->data, ret->data, ret->length); 105#endif 106 if (!ASN1_GENERALIZEDTIME_check(ret)) 107 { 108 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME,ASN1_R_INVALID_TIME_FORMAT); 109 goto err; 110 } 111 112 return(ret); 113err: 114 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 115 M_ASN1_GENERALIZEDTIME_free(ret); 116 return(NULL); 117 } 118 119int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d) 120 { 121 static int min[9]={ 0, 0, 1, 1, 0, 0, 0, 0, 0}; 122 static int max[9]={99, 99,12,31,23,59,59,12,59}; 123 char *a; 124 int n,i,l,o; 125 126 if (d->type != V_ASN1_GENERALIZEDTIME) return(0); 127 l=d->length; 128 a=(char *)d->data; 129 o=0; 130 /* GENERALIZEDTIME is similar to UTCTIME except the year is 131 * represented as YYYY. This stuff treats everything as a two digit 132 * field so make first two fields 00 to 99 133 */ 134 if (l < 13) goto err; 135 for (i=0; i<7; i++) 136 { 137 if ((i == 6) && ((a[o] == 'Z') || 138 (a[o] == '+') || (a[o] == '-'))) 139 { i++; break; } 140 if ((a[o] < '0') || (a[o] > '9')) goto err; 141 n= a[o]-'0'; 142 if (++o > l) goto err; 143 144 if ((a[o] < '0') || (a[o] > '9')) goto err; 145 n=(n*10)+ a[o]-'0'; 146 if (++o > l) goto err; 147 148 if ((n < min[i]) || (n > max[i])) goto err; 149 } 150 if (a[o] == 'Z') 151 o++; 152 else if ((a[o] == '+') || (a[o] == '-')) 153 { 154 o++; 155 if (o+4 > l) goto err; 156 for (i=7; i<9; i++) 157 { 158 if ((a[o] < '0') || (a[o] > '9')) goto err; 159 n= a[o]-'0'; 160 o++; 161 if ((a[o] < '0') || (a[o] > '9')) goto err; 162 n=(n*10)+ a[o]-'0'; 163 if ((n < min[i]) || (n > max[i])) goto err; 164 o++; 165 } 166 } 167 return(o == l); 168err: 169 return(0); 170 } 171 172int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, char *str) 173 { 174 ASN1_GENERALIZEDTIME t; 175 176 t.type=V_ASN1_GENERALIZEDTIME; 177 t.length=strlen(str); 178 t.data=(unsigned char *)str; 179 if (ASN1_GENERALIZEDTIME_check(&t)) 180 { 181 if (s != NULL) 182 { 183 ASN1_STRING_set((ASN1_STRING *)s, 184 (unsigned char *)str,t.length); 185 } 186 return(1); 187 } 188 else 189 return(0); 190 } 191 192ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, 193 time_t t) 194 { 195 char *p; 196 struct tm *ts; 197#if defined(THREADS) && !defined(WIN32) 198 struct tm data; 199#endif 200 201 if (s == NULL) 202 s=M_ASN1_GENERALIZEDTIME_new(); 203 if (s == NULL) 204 return(NULL); 205 206#if defined(THREADS) && !defined(WIN32) && ! defined(_DARWIN) 207 gmtime_r(&t,&data); /* should return &data, but doesn't on some systems, so we don't even look at the return value */ 208 ts=&data; 209#else 210 ts=gmtime(&t); 211#endif 212 p=(char *)s->data; 213 if ((p == NULL) || (s->length < 16)) 214 { 215 p=OPENSSL_malloc(20); 216 if (p == NULL) return(NULL); 217 if (s->data != NULL) 218 OPENSSL_free(s->data); 219 s->data=(unsigned char *)p; 220 } 221 222 sprintf(p,"%04d%02d%02d%02d%02d%02dZ",ts->tm_year + 1900, 223 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 224 s->length=strlen(p); 225 s->type=V_ASN1_GENERALIZEDTIME; 226#ifdef CHARSET_EBCDIC_not 227 ebcdic2ascii(s->data, s->data, s->length); 228#endif 229 return(s); 230 } 231