157 lines
4.4 KiB
Java
157 lines
4.4 KiB
Java
/*
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* Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.thialfihar.android.apg.helper;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Iterator;
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import org.spongycastle.openpgp.PGPObjectFactory;
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import org.spongycastle.openpgp.PGPPublicKeyRing;
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import org.spongycastle.openpgp.PGPSecretKey;
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import org.spongycastle.openpgp.PGPSecretKeyRing;
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import org.thialfihar.android.apg.Constants;
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import org.thialfihar.android.apg.util.Log;
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public class PGPConversionHelper {
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/**
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* Converts Vector<PGPSecretKey> to a 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[] PGPSecretKeyListToBytes(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 PGPSecretKey to byte[]!", e);
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}
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}
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byte[] keysBytes = os.toByteArray();
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return keysBytes;
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}
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/**
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* Convert from byte[] to PGPSecretKeyRing
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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 PGPSecretKeyRing BytesToPGPSecretKeyRing(byte[] keysBytes) {
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PGPObjectFactory factory = new PGPObjectFactory(keysBytes);
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PGPSecretKeyRing keyRing = null;
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try {
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if ((keyRing = (PGPSecretKeyRing) 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 PGPSecretKeyRing!", 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 PGPPublicKeyRing
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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 PGPPublicKeyRing BytesToPGPPublicKeyRing(byte[] keysBytes) {
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PGPObjectFactory factory = new PGPObjectFactory(keysBytes);
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PGPPublicKeyRing keyRing = null;
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try {
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if ((keyRing = (PGPPublicKeyRing) 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 PGPPublicKeyRing!", 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 = BytesToPGPSecretKeyRing(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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* @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 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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