001    /**
002     * Copyright 2005-2012 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.ksb.security;
017    
018    import java.security.Signature;
019    import java.security.cert.Certificate;
020    
021    import org.apache.commons.codec.binary.Base64;
022    
023    /**
024     * An abstract implementation of a DigitalSigner which provides convienance utilities for storing a reference
025     * to the Signature and also generating and encoding the actual digital signature.
026     * 
027     * @author Kuali Rice Team (rice.collab@kuali.org)
028     */
029    public abstract class AbstractDigitalSigner implements DigitalSigner {
030    
031            private Signature signature;
032            
033            public AbstractDigitalSigner(Signature signature) {
034                    this.signature = signature;
035            }
036            
037            public Signature getSignature() {
038                    return this.signature;
039            }
040            
041            protected byte[] getSignatureBytes() throws Exception {
042                    return getSignature().sign();
043            }
044            
045        protected String getEncodedSignature() throws Exception {
046            return new String(Base64.encodeBase64(getSignatureBytes()), "UTF-8");
047        }
048    
049        protected String getEncodedCertificate(Certificate certificate) throws Exception {
050            return new String(Base64.encodeBase64(certificate.getEncoded()), "UTF-8");
051        }
052    
053    }