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/*
* src/lib/krb5/asn.1/asn1_encode.c
*
* Copyright 1994 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
/* ASN.1 primitive encoders */
#include "asn1_encode.h"
#include "asn1_make.h"
asn1_error_code asn1_encode_integer(buf, val, retlen)
asn1buf * buf;
const long val;
int * retlen;
{
asn1_error_code retval;
int length = 0, partlen;
long valcopy;
int digit;
valcopy = val;
do {
digit = (int) (valcopy&0xFF);
retval = asn1buf_insert_octet(buf,(asn1_octet) digit);
if(retval) return retval;
length++;
valcopy = valcopy >> 8;
} while (valcopy != 0 && valcopy != ~0);
if((val > 0) && ((digit&0x80) == 0x80)) { /* make sure the high bit is */
retval = asn1buf_insert_octet(buf,0); /* of the proper signed-ness */
if(retval) return retval;
length++;
}else if((val < 0) && ((digit&0x80) != 0x80)){
retval = asn1buf_insert_octet(buf,0xFF);
if(retval) return retval;
length++;
}
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_INTEGER,length, &partlen);
if(retval) return retval;
length += partlen;
*retlen = length;
return 0;
}
asn1_error_code asn1_encode_unsigned_integer(buf, val, retlen)
asn1buf * buf;
const unsigned long val;
int * retlen;
{
asn1_error_code retval;
int length = 0, partlen;
unsigned long valcopy;
int digit;
valcopy = val;
do {
digit = (int) (valcopy&0xFF);
retval = asn1buf_insert_octet(buf,(asn1_octet) digit);
if(retval) return retval;
length++;
valcopy = valcopy >> 8;
} while (valcopy != 0 && valcopy != ~0);
if(digit&0x80) { /* make sure the high bit is */
retval = asn1buf_insert_octet(buf,0); /* of the proper signed-ness */
if(retval) return retval;
length++;
}
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_INTEGER,length, &partlen);
if(retval) return retval;
length += partlen;
*retlen = length;
return 0;
}
asn1_error_code asn1_encode_octetstring(buf, len, val, retlen)
asn1buf * buf;
const int len;
const asn1_octet * val;
int * retlen;
{
asn1_error_code retval;
int length;
retval = asn1buf_insert_octetstring(buf,len,val);
if(retval) return retval;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_OCTETSTRING,len,&length);
if(retval) return retval;
*retlen = len + length;
return 0;
}
asn1_error_code asn1_encode_charstring(buf, len, val, retlen)
asn1buf * buf;
const int len;
const char * val;
int * retlen;
{
asn1_error_code retval;
int length;
retval = asn1buf_insert_charstring(buf,len,val);
if(retval) return retval;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_OCTETSTRING,len,&length);
if(retval) return retval;
*retlen = len + length;
return 0;
}
asn1_error_code asn1_encode_null(buf, retlen)
asn1buf * buf;
int * retlen;
{
asn1_error_code retval;
retval = asn1buf_insert_octet(buf,0x00);
if(retval) return retval;
retval = asn1buf_insert_octet(buf,0x05);
if(retval) return retval;
*retlen = 2;
return 0;
}
asn1_error_code asn1_encode_printablestring(buf, len, val, retlen)
asn1buf * buf;
const int len;
const char * val;
int * retlen;
{
asn1_error_code retval;
int length;
retval = asn1buf_insert_charstring(buf,len,val);
if(retval) return retval;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_PRINTABLESTRING,len, &length);
if(retval) return retval;
*retlen = len + length;
return 0;
}
asn1_error_code asn1_encode_ia5string(buf, len, val, retlen)
asn1buf * buf;
const int len;
const char * val;
int * retlen;
{
asn1_error_code retval;
int length;
retval = asn1buf_insert_charstring(buf,len,val);
if(retval) return retval;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_IA5STRING,len, &length);
if(retval) return retval;
*retlen = len + length;
return 0;
}
#ifdef macintosh
#define EPOCH ((70 * 365 * 24 * 60 * 60) + (17 * 24 * 60 * 60) + (getTimeZoneOffset() * 60 * 60))
#else
#define EPOCH (0)
#endif
asn1_error_code asn1_encode_generaltime(buf, val, retlen)
asn1buf * buf;
const time_t val;
int * retlen;
{
asn1_error_code retval;
struct tm *gtime;
char s[16];
int length, sum=0;
time_t gmt_time;
gmt_time = val + EPOCH;
gtime = gmtime(&gmt_time);
/*
* Time encoding: YYYYMMDDhhmmssZ
*
* Sanity check this just to be paranoid, as gmtime can return NULL,
* and some bogus implementations might overrun on the sprintf.
*/
if (gtime == NULL ||
gtime->tm_year > 8099 || gtime->tm_mon > 11 ||
gtime->tm_mday > 31 || gtime->tm_hour > 23 ||
gtime->tm_min > 59 || gtime->tm_sec > 59)
return ASN1_BAD_GMTIME;
sprintf(s, "%04d%02d%02d%02d%02d%02dZ",
1900+gtime->tm_year, gtime->tm_mon+1, gtime->tm_mday,
gtime->tm_hour, gtime->tm_min, gtime->tm_sec);
retval = asn1buf_insert_charstring(buf,15,s);
if(retval) return retval;
sum = 15;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_GENERALTIME,sum,&length);
if(retval) return retval;
sum += length;
*retlen = sum;
return 0;
}
asn1_error_code asn1_encode_generalstring(buf, len, val, retlen)
asn1buf * buf;
const int len;
const char * val;
int * retlen;
{
asn1_error_code retval;
int length;
retval = asn1buf_insert_charstring(buf,len,val);
if(retval) return retval;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_GENERALSTRING,len,
&length);
if(retval) return retval;
*retlen = len + length;
return 0;
}
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