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package org.openslx.imagemaster.db;
import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPublicKeySpec;
import org.apache.log4j.Logger;
/**
* Represents a satellite in the database.
* Is used to authenticate the satellite.
*/
public class DbSatellite
{
private static final Logger LOG = Logger.getLogger( DbSatellite.class );
private String organization, address, name, prefix, publickeyString;
private PublicKey publickey = null;
private static final KeyFactory keyFact;
static
{
KeyFactory kf;
try {
kf = KeyFactory.getInstance( "RSA" );
} catch ( NoSuchAlgorithmException e ) {
kf = null;
}
keyFact = kf;
}
// needs to be public in order to be found by MySQL
public DbSatellite( String organization, String address, String name, String prefix, String publickeyString )
{
this.organization = organization;
this.address = address;
this.name = name;
this.prefix = prefix;
this.publickeyString = publickeyString;
}
public static DbSatellite fromOrganization( String organization )
{
return MySQL
.findUniqueOrNull(
DbSatellite.class,
"SELECT satellite.organization, satellite.address, satellite.name, satellite.prefix, satellite.publickey FROM satellite WHERE satellite.organization = ? LIMIT 1",
organization );
}
public static DbSatellite fromPrefix( String prefix )
{
return MySQL
.findUniqueOrNull(
DbSatellite.class,
"SELECT satellite.organization, satellite.address, satellite.name, satellite.prefix, satellite.publickey FROM satellite WHERE satellite.prefix = ? LIMIT 1",
prefix );
}
public String getAddress()
{
return address;
}
public String getName()
{
return name;
}
public String getOrganization()
{
return organization;
}
public String getPrefix()
{
return this.prefix;
}
/**
* Get the public key of this organization, if known and valid.
*
* @return Public key, null on error or not known
*/
public PublicKey getPubkey()
{
if ( publickey == null && keyFact != null && publickeyString != null ) {
String parts[] = publickeyString.split( " " );
if ( parts.length != 2 )
return null;
try {
BigInteger mod = new BigInteger( parts[0] );
BigInteger exp = new BigInteger( parts[1] );
RSAPublicKeySpec keySpec = new RSAPublicKeySpec( mod, exp );
synchronized ( keyFact ) {
publickey = keyFact.generatePublic( keySpec );
}
} catch ( InvalidKeySpecException e ) {
LOG.info( "PubKey of " + this.organization + " is not valid.", e );
} catch ( NumberFormatException e ) {
LOG.info( "PubKey of " + this.organization + " is corrupted in database!", e );
}
}
return publickey;
}
}
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