/*************************************************************************
* Copyright 2009-2014 Eucalyptus Systems, Inc.
*
* This program 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; version 3 of the License.
*
* This program 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, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
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*
* Redistributions of source code must retain the above copyright
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*
* Redistributions in binary form must reproduce the above copyright
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* in the documentation and/or other materials provided with the
* distribution.
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* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
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* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
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* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.crypto;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Signature;
import java.security.SignatureException;
import org.apache.log4j.Logger;
import com.eucalyptus.component.ComponentId;
import com.eucalyptus.component.auth.SystemCredentials;
public enum Signatures {
SHA256withRSA,
SHA1WithRSA;
private static Logger LOG = Logger.getLogger( Signatures.class );
private static final String HEXES = "0123456789abcdef";
public String trySign( final Class<? extends ComponentId> component, final byte[] data ) {
return trySign( componentPk( component ), data );
}
/**
* Identical to Signatures#sign() except in that it throws no checked exceptions and instead returns null in the case of a failure.
*/
public String trySign( final PrivateKey pk, final byte[] data ) {
try {
return this.sign( pk, data );
} catch ( Exception e ) {
return null;
}
}
public String sign( final PrivateKey pk, final byte[] data ) throws InvalidKeyException, SignatureException {
return bytesToHex( signBinary( pk, data ) );
}
public byte[] signBinary(
final Class<? extends ComponentId> component,
final byte[] data
) throws InvalidKeyException, SignatureException {
return signBinary( componentPk( component ), data );
}
public byte[] signBinary( final PrivateKey pk, final byte[] data ) throws InvalidKeyException, SignatureException {
final Signature signer = this.getInstance( );
signer.initSign( pk );
try {
signer.update( data );
return signer.sign( );
} catch ( SignatureException e ) {
LOG.debug( e, e );
throw e;
}
}
public Signature getInstance( ) {
try {
return Signature.getInstance( this.toString( ) );
} catch ( NoSuchAlgorithmException e ) {
LOG.fatal( e, e );
throw new RuntimeException( e );
}
}
static String bytesToHex( final byte[] bytes ) {
final char[] hex = new char[ bytes.length * 2 ];
for ( int i = 0; i < bytes.length; i++ ) {
int b = bytes[i] & 0xFF;
hex[ i * 2 ] = HEXES.charAt( b >>> 4 );
hex[ i * 2 + 1 ] = HEXES.charAt( b & 0x0F );
}
return new String( hex );
}
private PrivateKey componentPk( final Class<? extends ComponentId> component ) {
return SystemCredentials.lookup( component ).getPrivateKey( );
}
}