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;
+        }
+    }
+
+}