--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/five_ten_sg/connectbot/service/AuthAgentService.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,176 @@
+package com.five_ten_sg.connectbot.service;
+
+import java.io.IOException;
+import java.security.SecureRandom;
+import java.security.KeyPair;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.interfaces.DSAPrivateKey;
+import java.security.interfaces.DSAPublicKey;
+import java.security.interfaces.ECPrivateKey;
+import java.security.interfaces.ECPublicKey;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import com.five_ten_sg.connectbot.service.TerminalManager;
+import com.five_ten_sg.connectbot.service.TerminalManager.KeyHolder;
+import android.app.Service;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.madgag.ssh.android.authagent.AndroidAuthAgent;
+import com.trilead.ssh2.signature.DSASHA1Verify;
+import com.trilead.ssh2.signature.ECDSASHA2Verify;
+import com.trilead.ssh2.signature.RSASHA1Verify;
+
+public class AuthAgentService extends Service {
+    private static final String TAG = "ConnectBot.AuthAgentService";
+    protected TerminalManager manager;
+    final Lock lock = new ReentrantLock();
+    final Condition managerReady = lock.newCondition();
+
+    private ServiceConnection connection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            Log.d(TAG, "Terminal manager available! Hurrah");
+            manager = ((TerminalManager.TerminalBinder) service).getService();
+            lock.lock();
+
+            try {
+                managerReady.signal();
+            }
+            finally {
+                lock.unlock();
+            }
+        }
+        public void onServiceDisconnected(ComponentName className) {
+            manager = null;
+            Log.d(TAG, "Terminal manager gone...");
+        }
+    };
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        Log.d(TAG, "onBind() called");
+        bindService(new Intent(this, TerminalManager.class), connection, BIND_AUTO_CREATE);
+        return mBinder;
+    }
+
+    private final AndroidAuthAgent.Stub mBinder = new AndroidAuthAgent.Stub() {
+        public Map getIdentities() throws RemoteException {
+            Log.d(TAG, "getIdentities() called");
+            waitForTerminalManager();
+            Log.d(TAG, "getIdentities() manager.loadedKeypairs : " + manager.loadedKeypairs);
+            return sshEncodedPubKeysFrom(manager.loadedKeypairs);
+        }
+        public byte[] sign(byte[] publicKey, byte[] data) throws RemoteException {
+            Log.d(TAG, "sign() called");
+            waitForTerminalManager();
+            KeyPair pair = keyPairFor(publicKey);
+            Log.d(TAG, "sign() - signing keypair found : " + pair);
+
+            if (pair == null) {
+                return null;
+            }
+
+            PrivateKey privKey = pair.getPrivate();
+
+            if (privKey instanceof RSAPrivateKey) {
+                return sshEncodedSignatureFor(data, (RSAPrivateKey) privKey);
+            }
+            else if (privKey instanceof DSAPrivateKey) {
+                return sshEncodedSignatureFor(data, (DSAPrivateKey) privKey);
+            }
+
+            return null;
+        }
+        private void waitForTerminalManager() throws RemoteException {
+            lock.lock();
+
+            try {
+                while (manager == null) {
+                    Log.d(TAG, "Waiting for TerminalManager...");
+                    managerReady.await();
+                }
+            }
+            catch (InterruptedException e) {
+                throw new RemoteException();
+            }
+            finally {
+                lock.unlock();
+            }
+
+            Log.d(TAG, "Got TerminalManager : " + manager);
+        }
+        private Map<String, byte[]> sshEncodedPubKeysFrom(Map<String, KeyHolder> keypairs) {
+            Map<String, byte[]> pubkeys = new HashMap<String, byte[]> (keypairs.size());
+
+            for (Entry<String, KeyHolder> entry : keypairs.entrySet()) {
+                byte[] encodedKey = sshEncodedPubKeyFrom(entry.getValue().pair);
+
+                if (encodedKey != null) {
+                    pubkeys.put(entry.getKey(), encodedKey);
+                }
+            }
+
+            return pubkeys;
+        }
+        private byte[] sshEncodedPubKeyFrom(KeyPair pair) {
+            try {
+                PrivateKey privKey = pair.getPrivate();
+
+                if (privKey instanceof RSAPrivateKey) {
+                    RSAPublicKey pubkey = (RSAPublicKey)pair.getPublic();
+                    return RSASHA1Verify.encodeSSHRSAPublicKey(pubkey);
+                }
+                else if (privKey instanceof DSAPrivateKey) {
+                    DSAPublicKey pubkey = (DSAPublicKey)pair.getPublic();
+                    return DSASHA1Verify.encodeSSHDSAPublicKey(pubkey);
+                }
+            }
+            catch (IOException e) {
+                Log.e(TAG, "Couldn't encode " + pair, e);
+            }
+
+            return null;
+        }
+        private byte[] sshEncodedSignatureFor(byte[] data, RSAPrivateKey privKey) {
+            try {
+                byte[] signature = RSASHA1Verify.generateSignature(data, privKey);
+                return RSASHA1Verify.encodeSSHRSASignature(signature);
+            }
+            catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        private byte[] sshEncodedSignatureFor(byte[] data, DSAPrivateKey privKey) {
+            try {
+                byte[] signature = DSASHA1Verify.generateSignature(data, privKey, new SecureRandom());
+                return DSASHA1Verify.encodeSSHDSASignature(signature);
+            }
+            catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        private KeyPair keyPairFor(byte[] publicKey) {
+            String nickname = manager.getKeyNickname(publicKey);
+
+            if (nickname == null) {
+                Log.w(TAG, "No key-pair found for public-key.");
+                return null;
+            }
+
+            // check manager.loadedKeypairs.get(nickname).bean.isConfirmUse() and promptForPubkeyUse(nickname) ?
+            return manager.getKey(nickname);
+        }
+    };
+}