142 lines
4.0 KiB
Java
142 lines
4.0 KiB
Java
/*
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* Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.helper;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.Iterator;
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import org.spongycastle.openpgp.PGPKeyRing;
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import org.spongycastle.openpgp.PGPObjectFactory;
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import org.spongycastle.openpgp.PGPSecretKey;
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import org.spongycastle.openpgp.PGPSecretKeyRing;
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import org.spongycastle.openpgp.PGPUtil;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.util.Log;
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public class PgpConversionHelper {
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/**
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* Convert from byte[] to PGPKeyRing
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*
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* @param keysBytes
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* @return
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*/
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public static PGPKeyRing BytesToPGPKeyRing(byte[] keysBytes) {
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PGPObjectFactory factory = new PGPObjectFactory(keysBytes);
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PGPKeyRing keyRing = null;
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try {
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if ((keyRing = (PGPKeyRing) factory.nextObject()) == null) {
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Log.e(Constants.TAG, "No keys given!");
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}
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} catch (IOException e) {
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Log.e(Constants.TAG, "Error while converting to PGPKeyRing!", e);
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}
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return keyRing;
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}
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/**
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* Convert from byte[] to ArrayList<PGPSecretKey>
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*
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* @param keysBytes
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* @return
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*/
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public static ArrayList<PGPSecretKey> BytesToPGPSecretKeyList(byte[] keysBytes) {
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PGPSecretKeyRing keyRing = (PGPSecretKeyRing) BytesToPGPKeyRing(keysBytes);
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ArrayList<PGPSecretKey> keys = new ArrayList<PGPSecretKey>();
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@SuppressWarnings("unchecked")
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Iterator<PGPSecretKey> itr = keyRing.getSecretKeys();
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while (itr.hasNext()) {
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keys.add(itr.next());
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}
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return keys;
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}
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/**
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* Convert from byte[] to PGPSecretKey
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*
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* Singles keys are encoded as keyRings with one single key in it by Bouncy Castle
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*
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* @param keysBytes
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* @return
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*/
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public static PGPSecretKey BytesToPGPSecretKey(byte[] keyBytes) {
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PGPSecretKey key = BytesToPGPSecretKeyList(keyBytes).get(0);
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return key;
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}
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/**
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* Convert from ArrayList<PGPSecretKey> to byte[]
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*
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* @param keys
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* @return
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*/
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public static byte[] PGPSecretKeyArrayListToBytes(ArrayList<PGPSecretKey> keys) {
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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for (PGPSecretKey key : keys) {
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try {
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key.encode(os);
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} catch (IOException e) {
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Log.e(Constants.TAG, "Error while converting ArrayList<PGPSecretKey> to byte[]!", e);
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}
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}
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return os.toByteArray();
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}
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/**
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* Convert from PGPSecretKey to byte[]
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*
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* @param keysBytes
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* @return
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*/
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public static byte[] PGPSecretKeyToBytes(PGPSecretKey key) {
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try {
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return key.getEncoded();
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} catch (IOException e) {
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Log.e(Constants.TAG, "Encoding failed", e);
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return null;
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}
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}
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/**
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* Convert from PGPSecretKeyRing to byte[]
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*
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* @param keysBytes
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* @return
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*/
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public static byte[] PGPSecretKeyRingToBytes(PGPSecretKeyRing keyRing) {
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try {
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return keyRing.getEncoded();
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} catch (IOException e) {
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Log.e(Constants.TAG, "Encoding failed", e);
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return null;
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}
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}
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}
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