jtulach@44: /*
jtulach@44:  * To change this template, choose Tools | Templates
jtulach@44:  * and open the template in the editor.
jtulach@44:  */
jtulach@44: 
jtulach@44: package org.apidesign.impl.security.extension;
jtulach@44: 
jtulach@44: import org.apidesign.api.security.Digest;
jtulach@44: import java.nio.ByteBuffer;
jtulach@44: import java.security.MessageDigest;
jtulach@44: import java.security.NoSuchAlgorithmException;
jtulach@44: import java.security.Provider;
jtulach@44: import java.security.Security;
jtulach@44: import java.util.Collections;
jtulach@44: import java.util.List;
jtulach@44: import java.util.Map;
jtulach@44: 
jtulach@44: /**
jtulach@44:  *
jtulach@44:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jtulach@44:  */
jtulach@50: public class BridgeToOld extends Provider {
jtulach@44: 
jtulach@44:     public BridgeToOld() {
jtulach@44:         super("spi.Digestor", 1.0, "");
jtulach@44:         Security.addProvider(this);
jtulach@44:     }
jtulach@44:     
jtulach@44:     @Override
jtulach@44:     public synchronized Service getService(String type, String algorithm) {
jtulach@50:         if ("MessageDigest".equals(type)) {
jtulach@50:             Digest dig = Digest.getInstance(algorithm);
jtulach@50:             if (dig != null) {
jtulach@50:                 return new ServiceImpl(dig, this, type, algorithm, "", Collections.<String>emptyList(), Collections.<String,String>emptyMap());
jtulach@44:             }
jtulach@44:         }
jtulach@50:         return null;
jtulach@44:     }
jtulach@44: 
jtulach@44:     private static class ServiceImpl<Data> extends Service {
jtulach@44:         Digest dig;
jtulach@44: 
jtulach@44:         public ServiceImpl(Digest dig, Provider provider, String type, String algorithm, String className, List<String> aliases, Map<String, String> attributes) {
jtulach@44:             super(provider, type, algorithm, className, aliases, attributes);
jtulach@44:             this.dig = dig;
jtulach@44:         }
jtulach@44: 
jtulach@44:         @Override
jtulach@44:         public Object newInstance(Object constructorParameter) throws NoSuchAlgorithmException {
jtulach@44:             return new MessageDigest(getAlgorithm()) {
jtulach@44:                 private byte[] res;
jtulach@44:                 
jtulach@44:                 @Override
jtulach@44:                 protected void engineUpdate(byte input) {
jtulach@44:                     ByteBuffer bb = ByteBuffer.wrap(new byte[] { input });
jtulach@44:                     res = dig.digest(bb);
jtulach@44:                 }
jtulach@44: 
jtulach@44:                 @Override
jtulach@44:                 protected void engineUpdate(byte[] input, int offset, int len) {
jtulach@44:                     ByteBuffer bb = ByteBuffer.wrap(input);
jtulach@44:                     bb.position(offset);
jtulach@44:                     bb.limit(offset + len);
jtulach@44:                     res = dig.digest(bb);
jtulach@44:                 }
jtulach@44: 
jtulach@44:                 @Override
jtulach@44:                 protected byte[] engineDigest() {
jtulach@44:                     return res;
jtulach@44:                 }
jtulach@44: 
jtulach@44:                 @Override
jtulach@44:                 protected void engineReset() {
jtulach@44:                     dig = Digest.getInstance(getAlgorithm());
jtulach@44:                 }
jtulach@44:             };
jtulach@44:         }
jtulach@44:         
jtulach@44:         
jtulach@44:     }
jtulach@44: 
jtulach@44: }