crypto/asn1/a_utctm.c

   1 /* crypto/asn1/a_utctm.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 #include <stdio.h>
  60 #include <time.h>
  61 #ifdef VMS
  62 #include <descrip.h>
  63 #include <lnmdef.h>
  64 #include <starlet.h>
  65 #endif
  66 #include "cryptlib.h"
  67 #include <openssl/asn1.h>
  68
  69 ASN1_UTCTIME *ASN1_UTCTIME_new(void)
  70 { return M_ASN1_UTCTIME_new(); }
  71
  72 void ASN1_UTCTIME_free(ASN1_UTCTIME *x)
  73 { M_ASN1_UTCTIME_free(x); }
  74
  75 int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp)
  76         {
  77 #ifndef CHARSET_EBCDIC
  78         return(i2d_ASN1_bytes((ASN1_STRING *)a,pp,
  79                 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL));
  80 #else
  81         /* KLUDGE! We convert to ascii before writing DER */
  82         int len;
  83         char tmp[24];
  84         ASN1_STRING x = *(ASN1_STRING *)a;
  85
  86         len = x.length;
  87         ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len);
  88         x.data = tmp;
  89         return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);
  90 #endif
  91         }
  92
  93
  94 ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp,
  95              long length)
  96         {
  97         ASN1_UTCTIME *ret=NULL;
  98
  99         ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length,
 100                 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL);
 101         if (ret == NULL)
 102                 {
 103                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR);
 104                 return(NULL);
 105                 }
 106 #ifdef CHARSET_EBCDIC
 107         ascii2ebcdic(ret->data, ret->data, ret->length);
 108 #endif
 109         if (!ASN1_UTCTIME_check(ret))
 110                 {
 111                 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT);
 112                 goto err;
 113                 }
 114
 115         return(ret);
 116 err:
 117         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 118                 M_ASN1_UTCTIME_free(ret);
 119         return(NULL);
 120         }
 121
 122 int ASN1_UTCTIME_check(ASN1_UTCTIME *d)
 123         {
 124         static int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0};
 125         static int max[8]={99,12,31,23,59,59,12,59};
 126         char *a;
 127         int n,i,l,o;
 128
 129         if (d->type != V_ASN1_UTCTIME) return(0);
 130         l=d->length;
 131         a=(char *)d->data;
 132         o=0;
 133
 134         if (l < 11) goto err;
 135         for (i=0; i<6; i++)
 136                 {
 137                 if ((i == 5) && ((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=6; i<8; 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);
 168 err:
 169         return(0);
 170         }
 171
 172 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, char *str)
 173         {
 174         ASN1_UTCTIME t;
 175
 176         t.type=V_ASN1_UTCTIME;
 177         t.length=strlen(str);
 178         t.data=(unsigned char *)str;
 179         if (ASN1_UTCTIME_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
 192 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
 193         {
 194         char *p;
 195         struct tm *ts;
 196 #if defined(THREADS) && !defined(WIN32)
 197         struct tm data;
 198 #endif
 199
 200         if (s == NULL)
 201                 s=M_ASN1_UTCTIME_new();
 202         if (s == NULL)
 203                 return(NULL);
 204
 205 #if defined(THREADS) && !defined(WIN32)
 206         gmtime_r(&t,&data); /* should return &data, but doesn't on some systems, so we don't even look at the return value */
 207         ts=&data;
 208 #else
 209         ts=gmtime(&t);
 210 #endif
 211 #ifdef VMS
 212         if (ts == NULL)
 213                 {
 214                 static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
 215                 static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
 216                 char result[256];
 217                 unsigned int reslen = 0;
 218                 struct {
 219                         short buflen;
 220                         short code;
 221                         void *bufaddr;
 222                         unsigned int *reslen;
 223                 } itemlist[] = {
 224                         { 0, LNM$_STRING, 0, 0 },
 225                         { 0, 0, 0, 0 },
 226                 };
 227                 int status;
 228
 229                 /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
 230                 itemlist[0].buflen = sizeof(result);
 231                 itemlist[0].bufaddr = result;
 232                 itemlist[0].reslen = &reslen;
 233                 status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
 234                 if (!(status & 1))
 235                         return NULL;
 236                 result[reslen] = '\0';
 237
 238                 /* Get the numerical value of the equivalence string */
 239                 status = atoi(result);
 240
 241                 /* and use it to move time to GMT */
 242                 t -= status;
 243
 244                 /* then convert the result to the time structure */
 245                 ts=(struct tm *)localtime(&t);
 246                 }
 247 #endif
 248         p=(char *)s->data;
 249         if ((p == NULL) || (s->length < 14))
 250                 {
 251                 p=OPENSSL_malloc(20);
 252                 if (p == NULL) return(NULL);
 253                 if (s->data != NULL)
 254                         OPENSSL_free(s->data);
 255                 s->data=(unsigned char *)p;
 256                 }
 257
 258         sprintf(p,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100,
 259                 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec);
 260         s->length=strlen(p);
 261         s->type=V_ASN1_UTCTIME;
 262 #ifdef CHARSET_EBCDIC_not
 263         ebcdic2ascii(s->data, s->data, s->length);
 264 #endif
 265         return(s);
 266         }
 267
 268 time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s)
 269         {
 270         struct tm tm;
 271         int offset;
 272
 273         memset(&tm,'\0',sizeof tm);
 274
 275 #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0')
 276         tm.tm_year=g2(s->data);
 277         if(tm.tm_year < 50)
 278                 tm.tm_year+=100;
 279         tm.tm_mon=g2(s->data+2)-1;
 280         tm.tm_mday=g2(s->data+4);
 281         tm.tm_hour=g2(s->data+6);
 282         tm.tm_min=g2(s->data+8);
 283         tm.tm_sec=g2(s->data+10);
 284         if(s->data[12] == 'Z')
 285                 offset=0;
 286         else
 287                 {
 288                 offset=g2(s->data+13)*60+g2(s->data+15);
 289                 if(s->data[12] == '-')
 290                         offset= -offset;
 291                 }
 292 #undef g2
 293
 294         return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone
 295                                        * instead of UTC, and unless we rewrite OpenSSL
 296                                        * in Lisp we cannot locally change the timezone
 297                                        * without possibly interfering with other parts
 298                                        * of the program. timegm, which uses UTC, is
 299                                        * non-standard.
 300                                        * Also time_t is inappropriate for general
 301                                        * UTC times because it may a 32 bit type. */
 302         }