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/*
* src/lib/krb5/asn.1/asn1_make.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.
*/
#include "asn1_make.h"
asn1_error_code asn1_make_etag(buf, class, tagnum, in_len, retlen)
asn1buf * buf;
const asn1_class class;
const asn1_tagnum tagnum;
const int in_len;
int * retlen;
{
return asn1_make_tag(buf,class,CONSTRUCTED,tagnum,in_len,retlen);
}
asn1_error_code asn1_make_tag(buf, class, construction, tagnum, in_len, retlen)
asn1buf * buf;
const asn1_class class;
const asn1_construction construction;
const asn1_tagnum tagnum;
const int in_len;
int * retlen;
{
asn1_error_code retval;
int sumlen=0, length;
if(tagnum > ASN1_TAGNUM_MAX) return ASN1_OVERFLOW;
retval = asn1_make_length(buf,in_len, &length);
if(retval) return retval;
sumlen += length;
retval = asn1_make_id(buf,class,construction,tagnum,&length);
if(retval) return retval;
sumlen += length;
*retlen = sumlen;
return 0;
}
asn1_error_code asn1_make_length(buf, in_len, retlen)
asn1buf * buf;
const int in_len;
int * retlen;
{
asn1_error_code retval;
if(in_len < 128){
retval = asn1buf_insert_octet(buf, (asn1_octet)(in_len&0x7F));
if(retval) return retval;
*retlen = 1;
}else{
int in_copy=in_len, length=0;
while(in_copy != 0){
retval = asn1buf_insert_octet(buf, (asn1_octet)(in_copy&0xFF));
if(retval) return retval;
in_copy = in_copy >> 8;
length++;
}
retval = asn1buf_insert_octet(buf, (asn1_octet) (0x80 | (asn1_octet)(length&0x7F)));
if(retval) return retval;
length++;
*retlen = length;
}
return 0;
}
asn1_error_code asn1_make_id(buf, class, construction, tagnum, retlen)
asn1buf * buf;
const asn1_class class;
const asn1_construction construction;
const asn1_tagnum tagnum;
int * retlen;
{
asn1_error_code retval;
if(tagnum < 31) {
retval = asn1buf_insert_octet(buf, (asn1_octet) (class | construction |
(asn1_octet)tagnum));
if(retval) return retval;
*retlen = 1;
}else{
asn1_tagnum tagcopy = tagnum;
int length = 0;
retval = asn1buf_insert_octet(buf, (asn1_octet)(tagcopy&0x7F));
if(retval) return retval;
tagcopy >>= 7;
length++;
for(; tagcopy != 0; tagcopy >>= 7){
retval = asn1buf_insert_octet(buf, (asn1_octet) (0x80 | (asn1_octet)(tagcopy&0x7F)));
if(retval) return retval;
length++;
}
retval = asn1buf_insert_octet(buf, (asn1_octet) (class | construction | 0x1F));
if(retval) return retval;
length++;
*retlen = length;
}
return 0;
}
asn1_error_code asn1_make_sequence(buf, seq_len, retlen)
asn1buf * buf;
const int seq_len;
int * retlen;
{
asn1_error_code retval;
int len, sum=0;
retval = asn1_make_length(buf,seq_len,&len);
if(retval) return retval;
sum += len;
retval = asn1_make_id(buf,UNIVERSAL,CONSTRUCTED,ASN1_SEQUENCE,&len);
if(retval) return retval;
sum += len;
*retlen = sum;
return 0;
}
asn1_error_code asn1_make_set(buf, set_len, retlen)
asn1buf * buf;
const int set_len;
int * retlen;
{
asn1_error_code retval;
int len, sum=0;
retval = asn1_make_length(buf,set_len,&len);
if(retval) return retval;
sum += len;
retval = asn1_make_id(buf,UNIVERSAL,CONSTRUCTED,ASN1_SET,&len);
if(retval) return retval;
sum += len;
*retlen = sum;
return 0;
}
asn1_error_code asn1_make_string(buf, length, string, retlen)
asn1buf * buf;
const int length;
const char * string;
int * retlen;
{
asn1_error_code retval;
retval = asn1buf_insert_charstring(buf,length,string);
if(retval) return retval;
*retlen = length;
return 0;
}
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