/*************************************************************************
* Copyright 2009-2015 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
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.crypto;
import java.nio.ByteBuffer;
import java.security.MessageDigest;
import com.google.common.base.Optional;
public enum Digest {
GOST3411,
Tiger,
Whirlpool,
MD2,
MD4,
MD5,
RipeMD128,
RipeMD160,
RipeMD256,
RipeMD320,
SHA1("SHA-1"),
SHA224("SHA-224"),
SHA256("SHA-256"),
SHA384("SHA-384"),
SHA512("SHA-512");
private final ThreadLocal<MessageDigest> threadlocalDigest = new ThreadLocal<MessageDigest>() {
@Override
protected MessageDigest initialValue( ) {
final MessageDigest digest = Digest.this.get( );
digest.reset( );
return digest;
}
};
public static Optional<Digest> forAlgorithm( final String algorithm ) {
Optional<Digest> digest = Optional.absent( );
for ( final Digest candidateDigest : values( ) ) {
if ( candidateDigest.algorithm.equals( algorithm ) ) {
digest = Optional.of( candidateDigest );
break;
}
}
return digest;
}
public byte[] digestBinary( final byte[] data ) {
return threadlocalDigest.get( ).digest( data );
}
public byte[] digestBinary( final ByteBuffer data ) {
final MessageDigest digest = threadlocalDigest.get( );
digest.update( data );
return digest.digest( );
}
public String digestHex( final byte[] data ) {
return Signatures.bytesToHex( digestBinary( data ) );
}
public MessageDigest get( ) {
try {
return MessageDigest.getInstance( algorithm );
} catch ( Exception e ) {
e.printStackTrace( );
return null;
}
}
public String algorithm( ) {
return algorithm;
}
private final String algorithm;
private Digest() {
this.algorithm = name();
}
private Digest( final String algorithm ) {
this.algorithm = algorithm;
}
}