uk.ac.ebi.ega.cipher.GPGStream.java Source code

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Here is the source code for uk.ac.ebi.ega.cipher.GPGStream.java

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/*********************************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
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package uk.ac.ebi.ega.cipher;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.bouncycastle.openpgp.PGPCompressedData;
import org.bouncycastle.openpgp.PGPEncryptedDataList;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPLiteralData;
import org.bouncycastle.openpgp.PGPObjectFactory;
import org.bouncycastle.openpgp.PGPPBEEncryptedData;

/**
 *
 * @author asenf
 */
public class GPGStream extends Thread {
    public GPGStream(InputStream in, OutputStream out, int blocksize, char[] password, boolean mod,
            int pw_strength) {

        InputStream in_ = null;
        {
            InputStream clear = null;
            try {
                if (mod)
                    return;
                in_ = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in);
                PGPObjectFactory pgpF = new PGPObjectFactory(in_);
                PGPEncryptedDataList enc;
                Object o = pgpF.nextObject();
                if (o instanceof PGPEncryptedDataList) {
                    enc = (PGPEncryptedDataList) o;
                } else {
                    enc = (PGPEncryptedDataList) pgpF.nextObject();
                }
                PGPPBEEncryptedData pbe = (PGPPBEEncryptedData) enc.get(0);
                clear = pbe.getDataStream(password, "BC");
                PGPObjectFactory pgpFact = new PGPObjectFactory(clear);
                PGPCompressedData cData = (PGPCompressedData) pgpFact.nextObject();
                pgpFact = new PGPObjectFactory(cData.getDataStream());
                PGPLiteralData ld = (PGPLiteralData) pgpFact.nextObject();
                InputStream in__ = ld.getInputStream();
            } catch (PGPException ex) {
                Logger.getLogger(GPGStream.class.getName()).log(Level.SEVERE, null, ex);
            } catch (NoSuchProviderException ex) {
                Logger.getLogger(GPGStream.class.getName()).log(Level.SEVERE, null, ex);
            } catch (IOException ex) {
                Logger.getLogger(GPGStream.class.getName()).log(Level.SEVERE, null, ex);
            } catch (Throwable t) {

            } finally {
                try {
                    in_.close();
                } catch (IOException ex) {
                    Logger.getLogger(GPGStream.class.getName()).log(Level.SEVERE, null, ex);
                }
                try {
                    clear.close();
                } catch (IOException ex) {
                    Logger.getLogger(GPGStream.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }

    }

    public static InputStream getDecodingGPGInoutStream(FileInputStream fis, char[] pw)
            throws IOException, PGPException, NoSuchProviderException {
        InputStream in = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(fis);

        PGPObjectFactory pgpF = new PGPObjectFactory(in);
        PGPEncryptedDataList enc;

        Object o = pgpF.nextObject();
        if (o instanceof PGPEncryptedDataList) {
            enc = (PGPEncryptedDataList) o;
        } else {
            enc = (PGPEncryptedDataList) pgpF.nextObject();
        }

        PGPPBEEncryptedData pbe = (PGPPBEEncryptedData) enc.get(0);
        InputStream clear = pbe.getDataStream(pw, "BC");
        PGPObjectFactory pgpFact = new PGPObjectFactory(clear);
        PGPCompressedData cData = (PGPCompressedData) pgpFact.nextObject();
        pgpFact = new PGPObjectFactory(cData.getDataStream());
        PGPLiteralData ld = (PGPLiteralData) pgpFact.nextObject();

        return ld.getInputStream();
    }

    public static void setupGPG() {
        Security.insertProviderAt(new org.bouncycastle.jce.provider.BouncyCastleProvider(), 1);
    }

    public static void getEncodingGPGStream() {
        // TODO - maybe: GPG stream for encoding with public key
    }

}