/* $Id: BankKeys.java,v 1.1 2011/05/04 22:37:48 willuhn Exp $
This file is part of HBCI4Java
Copyright (C) 2001-2008 Stefan Palme
HBCI4Java is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
HBCI4Java is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.kapott.hbci.passport.rdhXfile;
import java.io.ByteArrayOutputStream;
import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.RSAPublicKeySpec;
import org.kapott.hbci.datatypes.SyntaxCtr;
import org.kapott.hbci.exceptions.HBCI_Exception;
import org.kapott.hbci.manager.HBCIKey;
import org.kapott.hbci.manager.HBCIUtils;
public class BankKeys
extends TLV
{
private String countrycode;
private String blz;
private int keytype;
private int keyversion;
private int keynum;
private String keyname;
private byte[] modulus;
private byte[] exponent;
private PublicKey key;
public BankKeys()
{
super(0x53d6);
}
public BankKeys(TLV tlv)
{
super(tlv);
byte[] data=this.getData();
this.countrycode=new String(data,0,3).trim();
this.blz=new String(data,3,30).trim();
this.keytype=data[34];
this.keyversion=((data[36]&0xFF)<<8) | (data[35]&0xFF);
this.keynum=((data[38]&0xFF)<<8) | (data[37]&0xFF);
this.keyname=new String(data,39,30).trim();
int len=((data[70]&0xFF)<<8) | (data[69]&0xFF);
this.modulus=new byte[len];
for (int i=0;i<len;i++) {
this.modulus[len-i-1]=data[71+i];
}
int offset=71+len;
len=((data[offset+1]&0xFF)<<8) | (data[offset]&0xFF);
offset+=2;
this.exponent=new byte[len];
for (int i=0;i<len;i++) {
this.exponent[len-i-1]=data[offset+i];
}
offset+=len;
try {
RSAPublicKeySpec spec=new RSAPublicKeySpec(
new BigInteger(+1,modulus),
new BigInteger(+1,exponent));
KeyFactory fac=KeyFactory.getInstance("RSA");
this.key=fac.generatePublic(spec);
} catch (Exception e) {
throw new HBCI_Exception(e);
}
HBCIUtils.log("found bank keys with keynum="+this.keynum, HBCIUtils.LOG_DEBUG);
}
public String getCountry()
{
return new SyntaxCtr(new StringBuffer(countrycode),1,0).toString();
}
public void setCountry(String country)
{
this.countrycode=new SyntaxCtr(country,1,0).toString(0);
}
public String getBLZ()
{
return this.blz;
}
public void setBLZ(String blz)
{
this.blz=blz;
}
public String getKeyType()
{
return (keytype==0)?"S":"V";
}
public HBCIKey getHBCIKey()
{
return new HBCIKey(
countrycode,blz,keyname,
Integer.toString(keynum),Integer.toString(keyversion),
key);
}
public void setKey(String keytype, HBCIKey key)
{
if (keytype.equals("S"))
this.keytype=0;
else
this.keytype=1;
this.keyname=key.userid;
this.keynum=Integer.parseInt(key.num);
this.keyversion=Integer.parseInt(key.version);
RSAPublicKey pubkey=(RSAPublicKey)key.key;
this.key=pubkey;
this.modulus=trimba(pubkey.getModulus().toByteArray());
this.exponent=trimba(pubkey.getPublicExponent().toByteArray());
}
public void updateData()
{
try {
ByteArrayOutputStream os=new ByteArrayOutputStream();
os.write(this.countrycode.getBytes());
os.write(expand(getBLZ(),30).getBytes());
os.write(new byte[] {0x02});
os.write(new byte[] {(byte)this.keytype});
os.write(int2ba(this.keyversion));
os.write(int2ba(this.keynum));
os.write(expand(this.keyname,30).getBytes("ISO-8859-1"));
os.write(int2ba(this.modulus.length));
os.write(reverseba(this.modulus));
os.write(int2ba(this.exponent.length));
os.write(reverseba(this.exponent));
setData(os.toByteArray());
} catch (Exception e) {
throw new HBCI_Exception(e);
}
}
public String toString()
{
StringBuffer ret=new StringBuffer();
ret.append("bankkeys: countrycode="+this.countrycode);
ret.append("; blz="+this.blz);
ret.append("; keytype="+this.keytype);
ret.append("; keynum="+this.keynum);
ret.append("; keyversion="+this.keyversion);
ret.append("; keyname="+this.keyname);
ret.append("; modulus=");
for (int i=0;i<this.modulus.length;i++) {
int x=this.modulus[i]&0xFF;
ret.append(Integer.toString(x,16)+" ");
}
ret.append("; exponent=");
for (int i=0;i<this.exponent.length;i++) {
int x=this.exponent[i]&0xFF;
ret.append(Integer.toString(x,16)+" ");
}
return ret.toString();
}
}