diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java')
| -rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java new file mode 100644 index 000000000..c6c62d649 --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java @@ -0,0 +1,200 @@ +/* + * Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +package org.sufficientlysecure.keychain.pgp; + +import org.spongycastle.openpgp.PGPKeyRing; +import org.spongycastle.openpgp.PGPObjectFactory; +import org.spongycastle.openpgp.PGPSecretKey; +import org.spongycastle.openpgp.PGPSecretKeyRing; +import org.spongycastle.openpgp.PGPSignature; +import org.spongycastle.openpgp.PGPSignatureList; +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.util.Log; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Iterator; + + +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) { + PGPObjectFactory factory = new PGPObjectFactory(keysBytes); + Object obj = null; + ArrayList<PGPSecretKey> keys = new ArrayList<PGPSecretKey>(); + try { + while ((obj = factory.nextObject()) != null) { + PGPSecretKey secKey = null; + if (obj instanceof PGPSecretKey) { + secKey = (PGPSecretKey) obj; + if (secKey == null) { + Log.e(Constants.TAG, "No keys given!"); + } + keys.add(secKey); + } else if (obj instanceof PGPSecretKeyRing) { //master keys are sent as keyrings + PGPSecretKeyRing keyRing = null; + keyRing = (PGPSecretKeyRing) obj; + if (keyRing == null) { + Log.e(Constants.TAG, "No keys given!"); + } + @SuppressWarnings("unchecked") + Iterator<PGPSecretKey> itr = keyRing.getSecretKeys(); + while (itr.hasNext()) { + keys.add(itr.next()); + } + } + } + } catch (IOException e) { + } + + return keys; + } + + /** + * Convert from byte[] to PGPSecretKey + * <p/> + * Singles keys are encoded as keyRings with one single key in it by Bouncy Castle + * + * @param keyBytes + * @return + */ + public static PGPSecretKey BytesToPGPSecretKey(byte[] keyBytes) { + PGPObjectFactory factory = new PGPObjectFactory(keyBytes); + Object obj = null; + try { + obj = factory.nextObject(); + } catch (IOException e) { + Log.e(Constants.TAG, "Error while converting to PGPSecretKey!", e); + } + PGPSecretKey secKey = null; + if (obj instanceof PGPSecretKey) { + if ((secKey = (PGPSecretKey) obj) == null) { + Log.e(Constants.TAG, "No keys given!"); + } + } else if (obj instanceof PGPSecretKeyRing) { //master keys are sent as keyrings + PGPSecretKeyRing keyRing = null; + if ((keyRing = (PGPSecretKeyRing) obj) == null) { + Log.e(Constants.TAG, "No keys given!"); + } + secKey = keyRing.getSecretKey(); + } + + return secKey; + } + + /** + * Convert from byte[] to PGPSignature + * + * @param sigBytes + * @return + */ + public static PGPSignature BytesToPGPSignature(byte[] sigBytes) { + PGPObjectFactory factory = new PGPObjectFactory(sigBytes); + PGPSignatureList signatures = null; + try { + if ((signatures = (PGPSignatureList) factory.nextObject()) == null || signatures.isEmpty()) { + Log.e(Constants.TAG, "No signatures given!"); + return null; + } + } catch (IOException e) { + Log.e(Constants.TAG, "Error while converting to PGPSignature!", e); + return null; + } + + return signatures.get(0); + } + + /** + * 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 key + * @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 keyRing + * @return + */ + public static byte[] PGPSecretKeyRingToBytes(PGPSecretKeyRing keyRing) { + try { + return keyRing.getEncoded(); + } catch (IOException e) { + Log.e(Constants.TAG, "Encoding failed", e); + + return null; + } + } + +} |