1 files changed, 139 insertions, 0 deletions
diff --git a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java
new file mode 100644
index 000000000..e406a142e
--- /dev/null
+++ b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/pgp/PgpConversionHelper.java
@@ -0,0 +1,139 @@
+/*
+ * 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 java.io.ByteArrayOutputStream;
+import java.io.IOException;
+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.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;
+        }
+    }
+
+}