diff options
Diffstat (limited to 'OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpConversionHelper.java')
-rw-r--r-- | OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpConversionHelper.java | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpConversionHelper.java b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpConversionHelper.java new file mode 100644 index 000000000..3be4c595c --- /dev/null +++ b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpConversionHelper.java @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de> + * + * Licensed 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. + */ + +package org.sufficientlysecure.keychain.helper; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Iterator; + +import org.spongycastle.openpgp.PGPKeyRing; +import org.spongycastle.openpgp.PGPObjectFactory; +import org.spongycastle.openpgp.PGPSecretKey; +import org.spongycastle.openpgp.PGPSecretKeyRing; +import org.spongycastle.openpgp.PGPUtil; +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.util.Log; + + +public class PgpConversionHelper { + + /** + * Convert from byte[] to PGPKeyRing + * + * @param keysBytes + * @return + */ + public static PGPKeyRing BytesToPGPKeyRing(byte[] keysBytes) { + PGPObjectFactory factory = new PGPObjectFactory(keysBytes); + PGPKeyRing keyRing = null; + try { + if ((keyRing = (PGPKeyRing) factory.nextObject()) == null) { + Log.e(Constants.TAG, "No keys given!"); + } + } catch (IOException e) { + Log.e(Constants.TAG, "Error while converting to PGPKeyRing!", e); + } + + return keyRing; + } + + /** + * Convert from byte[] to ArrayList<PGPSecretKey> + * + * @param keysBytes + * @return + */ + public static ArrayList<PGPSecretKey> BytesToPGPSecretKeyList(byte[] keysBytes) { + PGPSecretKeyRing keyRing = (PGPSecretKeyRing) BytesToPGPKeyRing(keysBytes); + ArrayList<PGPSecretKey> keys = new ArrayList<PGPSecretKey>(); + + @SuppressWarnings("unchecked") + Iterator<PGPSecretKey> itr = keyRing.getSecretKeys(); + while (itr.hasNext()) { + keys.add(itr.next()); + } + + return keys; + } + + /** + * Convert from byte[] to PGPSecretKey + * + * Singles keys are encoded as keyRings with one single key in it by Bouncy Castle + * + * @param keysBytes + * @return + */ + public static PGPSecretKey BytesToPGPSecretKey(byte[] keyBytes) { + PGPSecretKey key = BytesToPGPSecretKeyList(keyBytes).get(0); + + return key; + } + + /** + * Convert from ArrayList<PGPSecretKey> to byte[] + * + * @param keys + * @return + */ + public static byte[] PGPSecretKeyArrayListToBytes(ArrayList<PGPSecretKey> keys) { + ByteArrayOutputStream os = new ByteArrayOutputStream(); + for (PGPSecretKey key : keys) { + try { + key.encode(os); + } catch (IOException e) { + Log.e(Constants.TAG, "Error while converting ArrayList<PGPSecretKey> to byte[]!", e); + } + } + + return os.toByteArray(); + } + + /** + * Convert from PGPSecretKey to byte[] + * + * @param keysBytes + * @return + */ + public static byte[] PGPSecretKeyToBytes(PGPSecretKey key) { + try { + return key.getEncoded(); + } catch (IOException e) { + Log.e(Constants.TAG, "Encoding failed", e); + + return null; + } + } + + /** + * Convert from PGPSecretKeyRing to byte[] + * + * @param keysBytes + * @return + */ + public static byte[] PGPSecretKeyRingToBytes(PGPSecretKeyRing keyRing) { + try { + return keyRing.getEncoded(); + } catch (IOException e) { + Log.e(Constants.TAG, "Encoding failed", e); + + return null; + } + } + +} |