src/com/android/certinstaller/CertInstaller.java - platform/packages/apps/CertInstaller - Git at Google

 /*
  * Copyright (C) 2009 The Android Open Source Project
  *
  * 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 com.android.certinstaller;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.ProgressDialog;
 import android.content.ActivityNotFoundException;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.security.Credentials;
 import android.security.KeyChain;
 import android.security.KeyChain.KeyChainConnection;
 import android.security.KeyStore;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.EditText;
 import android.widget.Toast;

 import java.io.Serializable;
 import java.security.cert.X509Certificate;
 import java.util.LinkedHashMap;
 import java.util.Map;

 /**
  * Installs certificates to the system keystore.
  */
 public class CertInstaller extends Activity {
     private static final String TAG = "CertInstaller";

     private static final int STATE_INIT = 1;
     private static final int STATE_RUNNING = 2;
     private static final int STATE_PAUSED = 3;

     private static final int NAME_CREDENTIAL_DIALOG = 1;
     private static final int PKCS12_PASSWORD_DIALOG = 2;
     private static final int PROGRESS_BAR_DIALOG = 3;

     private static final int REQUEST_SYSTEM_INSTALL_CODE = 1;

     // key to states Bundle
     private static final String NEXT_ACTION_KEY = "na";

     // key to KeyStore
     private static final String PKEY_MAP_KEY = "PKEY_MAP";

     private final KeyStore mKeyStore = KeyStore.getInstance();
     private final ViewHelper mView = new ViewHelper();

     private int mState;
     private CredentialHelper mCredentials;
     private MyAction mNextAction;

     private CredentialHelper createCredentialHelper(Intent intent) {
         try {
             return new CredentialHelper(intent);
         } catch (Throwable t) {
             Log.w(TAG, "createCredentialHelper", t);
             toastErrorAndFinish(R.string.invalid_cert);
             return new CredentialHelper();
         }
     }

     @Override
     protected void onCreate(Bundle savedStates) {
         super.onCreate(savedStates);

         if (UserHandle.myUserId() != UserHandle.USER_OWNER) {
             toastErrorAndFinish(R.string.only_primary_user_allowed);
             finish();
             return;
         }

         mCredentials = createCredentialHelper(getIntent());

         mState = (savedStates == null) ? STATE_INIT : STATE_RUNNING;

         if (mState == STATE_INIT) {
             if (!mCredentials.containsAnyRawData()) {
                 toastErrorAndFinish(R.string.no_cert_to_saved);
                 finish();
             } else if (mCredentials.hasPkcs12KeyStore()) {
                 showDialog(PKCS12_PASSWORD_DIALOG);
             } else {
                 MyAction action = new InstallOthersAction();
                 if (needsKeyStoreAccess()) {
                     sendUnlockKeyStoreIntent();
                     mNextAction = action;
                 } else {
                     action.run(this);
                 }
             }
         } else {
             mCredentials.onRestoreStates(savedStates);
             mNextAction = (MyAction)
                     savedStates.getSerializable(NEXT_ACTION_KEY);
         }
     }

     @Override
     protected void onResume() {
         super.onResume();

         if (mState == STATE_INIT) {
             mState = STATE_RUNNING;
         } else {
             if (mNextAction != null) {
                 mNextAction.run(this);
             }
         }
     }

     private boolean needsKeyStoreAccess() {
         return ((mCredentials.hasKeyPair() || mCredentials.hasUserCertificate())
                 && (mKeyStore.state() != KeyStore.State.UNLOCKED));
     }

     @Override
     protected void onPause() {
         super.onPause();
         mState = STATE_PAUSED;
     }

     @Override
     protected void onSaveInstanceState(Bundle outStates) {
         super.onSaveInstanceState(outStates);
         mCredentials.onSaveStates(outStates);
         if (mNextAction != null) {
             outStates.putSerializable(NEXT_ACTION_KEY, mNextAction);
         }
     }

     @Override
     protected Dialog onCreateDialog (int dialogId) {
         switch (dialogId) {
             case PKCS12_PASSWORD_DIALOG:
                 return createPkcs12PasswordDialog();

             case NAME_CREDENTIAL_DIALOG:
                 return createNameCredentialDialog();

             case PROGRESS_BAR_DIALOG:
                 ProgressDialog dialog = new ProgressDialog(this);
                 dialog.setMessage(getString(R.string.extracting_pkcs12));
                 dialog.setIndeterminate(true);
                 dialog.setCancelable(false);
                 return dialog;

             default:
                 return null;
         }
     }

     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode == REQUEST_SYSTEM_INSTALL_CODE) {
             if (resultCode == RESULT_OK) {
                 Log.d(TAG, "credential is added: " + mCredentials.getName());
                 Toast.makeText(this, getString(R.string.cert_is_added,
                         mCredentials.getName()), Toast.LENGTH_LONG).show();

                 if (mCredentials.hasCaCerts()) {
                     // more work to do, don't finish just yet
                     new InstallCaCertsToKeyChainTask().execute();
                     return;
                 }
                 setResult(RESULT_OK);
             } else {
                 Log.d(TAG, "credential not saved, err: " + resultCode);
                 toastErrorAndFinish(R.string.cert_not_saved);
             }
         } else {
             Log.w(TAG, "unknown request code: " + requestCode);
         }
         finish();
     }

     private class InstallCaCertsToKeyChainTask extends AsyncTask<Void, Void, Boolean> {

         @Override protected Boolean doInBackground(Void... unused) {
             try {
                 KeyChainConnection keyChainConnection = KeyChain.bind(CertInstaller.this);
                 try {
                     return mCredentials.installCaCertsToKeyChain(keyChainConnection.getService());
                 } finally {
                     keyChainConnection.close();
                 }
             } catch (InterruptedException e) {
                 Thread.currentThread().interrupt();
                 return false;
             }
         }

         @Override protected void onPostExecute(Boolean success) {
             if (success) {
                 setResult(RESULT_OK);
             }
             finish();
         }
     }

     void installOthers() {
         if (mCredentials.hasKeyPair()) {
             saveKeyPair();
             finish();
         } else {
             X509Certificate cert = mCredentials.getUserCertificate();
             if (cert != null) {
                 // find matched private key
                 String key = Util.toMd5(cert.getPublicKey().getEncoded());
                 Map<String, byte[]> map = getPkeyMap();
                 byte[] privatekey = map.get(key);
                 if (privatekey != null) {
                     Log.d(TAG, "found matched key: " + privatekey);
                     map.remove(key);
                     savePkeyMap(map);

                     mCredentials.setPrivateKey(privatekey);
                 } else {
                     Log.d(TAG, "didn't find matched private key: " + key);
                 }
             }
             nameCredential();
         }
     }

     private void sendUnlockKeyStoreIntent() {
         Credentials.getInstance().unlock(this);
     }

     private void nameCredential() {
         if (!mCredentials.hasAnyForSystemInstall()) {
             toastErrorAndFinish(R.string.no_cert_to_saved);
         } else {
             showDialog(NAME_CREDENTIAL_DIALOG);
         }
     }

     private void saveKeyPair() {
         byte[] privatekey = mCredentials.getData(Credentials.EXTRA_PRIVATE_KEY);
         String key = Util.toMd5(mCredentials.getData(Credentials.EXTRA_PUBLIC_KEY));
         Map<String, byte[]> map = getPkeyMap();
         map.put(key, privatekey);
         savePkeyMap(map);
         Log.d(TAG, "save privatekey: " + key + " --> #keys:" + map.size());
     }

     private void savePkeyMap(Map<String, byte[]> map) {
         if (map.isEmpty()) {
             if (!mKeyStore.delete(PKEY_MAP_KEY)) {
                 Log.w(TAG, "savePkeyMap(): failed to delete pkey map");
             }
             return;
         }
         byte[] bytes = Util.toBytes(map);
         if (!mKeyStore.put(PKEY_MAP_KEY, bytes)) {
             Log.w(TAG, "savePkeyMap(): failed to write pkey map");
         }
     }

     private Map<String, byte[]> getPkeyMap() {
         byte[] bytes = mKeyStore.get(PKEY_MAP_KEY);
         if (bytes != null) {
             Map<String, byte[]> map =
                     (Map<String, byte[]>) Util.fromBytes(bytes);
             if (map != null) return map;
         }
         return new MyMap();
     }

     void extractPkcs12InBackground(final String password) {
         // show progress bar and extract certs in a background thread
         showDialog(PROGRESS_BAR_DIALOG);

         new AsyncTask<Void,Void,Boolean>() {
             @Override protected Boolean doInBackground(Void... unused) {
                 return mCredentials.extractPkcs12(password);
             }
             @Override protected void onPostExecute(Boolean success) {
                 MyAction action = new OnExtractionDoneAction(success);
                 if (mState == STATE_PAUSED) {
                     // activity is paused; run it in next onResume()
                     mNextAction = action;
                 } else {
                     action.run(CertInstaller.this);
                 }
             }
         }.execute();
     }

     void onExtractionDone(boolean success) {
         mNextAction = null;
         removeDialog(PROGRESS_BAR_DIALOG);
         if (success) {
             removeDialog(PKCS12_PASSWORD_DIALOG);
             nameCredential();
         } else {
             mView.setText(R.id.credential_password, "");
             mView.showError(R.string.password_error);
             showDialog(PKCS12_PASSWORD_DIALOG);
         }
     }

     private Dialog createPkcs12PasswordDialog() {
         View view = View.inflate(this, R.layout.password_dialog, null);
         mView.setView(view);
         if (mView.getHasEmptyError()) {
             mView.showError(R.string.password_empty_error);
             mView.setHasEmptyError(false);
         }

         String title = mCredentials.getName();
         title = TextUtils.isEmpty(title)
                 ? getString(R.string.pkcs12_password_dialog_title)
                 : getString(R.string.pkcs12_file_password_dialog_title, title);
         Dialog d = new AlertDialog.Builder(this)
                 .setView(view)
                 .setTitle(title)
                 .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int id) {
                         String password = mView.getText(R.id.credential_password);
                         mNextAction = new Pkcs12ExtractAction(password);
                         mNextAction.run(CertInstaller.this);
                      }
                 })
                 .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int id) {
                         toastErrorAndFinish(R.string.cert_not_saved);
                     }
                 })
                 .create();
         d.setOnCancelListener(new DialogInterface.OnCancelListener() {
             @Override public void onCancel(DialogInterface dialog) {
                 toastErrorAndFinish(R.string.cert_not_saved);
             }
         });
         return d;
     }

     private Dialog createNameCredentialDialog() {
         ViewGroup view = (ViewGroup) View.inflate(this, R.layout.name_credential_dialog, null);
         mView.setView(view);
         if (mView.getHasEmptyError()) {
             mView.showError(R.string.name_empty_error);
             mView.setHasEmptyError(false);
         }
         mView.setText(R.id.credential_info, mCredentials.getDescription(this).toString());
         final EditText nameInput = (EditText) view.findViewById(R.id.credential_name);
         nameInput.setText(getDefaultName());
         nameInput.selectAll();
         Dialog d = new AlertDialog.Builder(this)
                 .setView(view)
                 .setTitle(R.string.name_credential_dialog_title)
                 .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int id) {
                         String name = mView.getText(R.id.credential_name);
                         if (TextUtils.isEmpty(name)) {
                             mView.setHasEmptyError(true);
                             removeDialog(NAME_CREDENTIAL_DIALOG);
                             showDialog(NAME_CREDENTIAL_DIALOG);
                         } else {
                             removeDialog(NAME_CREDENTIAL_DIALOG);
                             mCredentials.setName(name);

                             // install everything to system keystore
                             try {
                                 startActivityForResult(
                                         mCredentials.createSystemInstallIntent(),
                                         REQUEST_SYSTEM_INSTALL_CODE);
                             } catch (ActivityNotFoundException e) {
                                 Log.w(TAG, "systemInstall(): " + e);
                                 toastErrorAndFinish(R.string.cert_not_saved);
                             }
                         }
                     }
                 })
                 .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int id) {
                         toastErrorAndFinish(R.string.cert_not_saved);
                     }
                 })
                 .create();
         d.setOnCancelListener(new DialogInterface.OnCancelListener() {
             @Override public void onCancel(DialogInterface dialog) {
                 toastErrorAndFinish(R.string.cert_not_saved);
             }
         });
         return d;
     }

     private String getDefaultName() {
         String name = mCredentials.getName();
         if (TextUtils.isEmpty(name)) {
             return null;
         } else {
             // remove the extension from the file name
             int index = name.lastIndexOf(".");
             if (index > 0) name = name.substring(0, index);
             return name;
         }
     }

     private void toastErrorAndFinish(int msgId) {
         Toast.makeText(this, msgId, Toast.LENGTH_SHORT).show();
         finish();
     }

     private static class MyMap extends LinkedHashMap<String, byte[]>
             implements Serializable {
         private static final long serialVersionUID = 1L;

         @Override
         protected boolean removeEldestEntry(Map.Entry eldest) {
             // Note: one key takes about 1300 bytes in the keystore, so be
             // cautious about allowing more outstanding keys in the map that
             // may go beyond keystore's max length for one entry.
             return (size() > 3);
         }
     }

     private interface MyAction extends Serializable {
         void run(CertInstaller host);
     }

     private static class Pkcs12ExtractAction implements MyAction {
         private final String mPassword;
         private transient boolean hasRun;

         Pkcs12ExtractAction(String password) {
             mPassword = password;
         }

         public void run(CertInstaller host) {
             if (hasRun) {
                 return;
             }
             hasRun = true;
             host.extractPkcs12InBackground(mPassword);
         }
     }

     private static class InstallOthersAction implements MyAction {
         public void run(CertInstaller host) {
             host.mNextAction = null;
             host.installOthers();
         }
     }

     private static class OnExtractionDoneAction implements MyAction {
         private final boolean mSuccess;

         OnExtractionDoneAction(boolean success) {
             mSuccess = success;
         }

         public void run(CertInstaller host) {
             host.onExtractionDone(mSuccess);
         }
     }
 }
	/*
	* Copyright (C) 2009 The Android Open Source Project
	*
	* 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 com.android.certinstaller;

	import android.app.Activity;
	import android.app.AlertDialog;
	import android.app.Dialog;
	import android.app.ProgressDialog;
	import android.content.ActivityNotFoundException;
	import android.content.DialogInterface;
	import android.content.Intent;
	import android.os.AsyncTask;
	import android.os.Bundle;
	import android.os.UserHandle;
	import android.security.Credentials;
	import android.security.KeyChain;
	import android.security.KeyChain.KeyChainConnection;
	import android.security.KeyStore;
	import android.text.TextUtils;
	import android.util.Log;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.EditText;
	import android.widget.Toast;

	import java.io.Serializable;
	import java.security.cert.X509Certificate;
	import java.util.LinkedHashMap;
	import java.util.Map;

	/**
	* Installs certificates to the system keystore.
	*/
	public class CertInstaller extends Activity {
	private static final String TAG = "CertInstaller";

	private static final int STATE_INIT = 1;
	private static final int STATE_RUNNING = 2;
	private static final int STATE_PAUSED = 3;

	private static final int NAME_CREDENTIAL_DIALOG = 1;
	private static final int PKCS12_PASSWORD_DIALOG = 2;
	private static final int PROGRESS_BAR_DIALOG = 3;

	private static final int REQUEST_SYSTEM_INSTALL_CODE = 1;

	// key to states Bundle
	private static final String NEXT_ACTION_KEY = "na";

	// key to KeyStore
	private static final String PKEY_MAP_KEY = "PKEY_MAP";

	private final KeyStore mKeyStore = KeyStore.getInstance();
	private final ViewHelper mView = new ViewHelper();

	private int mState;
	private CredentialHelper mCredentials;
	private MyAction mNextAction;

	private CredentialHelper createCredentialHelper(Intent intent) {
	try {
	return new CredentialHelper(intent);
	} catch (Throwable t) {
	Log.w(TAG, "createCredentialHelper", t);
	toastErrorAndFinish(R.string.invalid_cert);
	return new CredentialHelper();
	}
	}

	@Override
	protected void onCreate(Bundle savedStates) {
	super.onCreate(savedStates);

	if (UserHandle.myUserId() != UserHandle.USER_OWNER) {
	toastErrorAndFinish(R.string.only_primary_user_allowed);
	finish();
	return;
	}

	mCredentials = createCredentialHelper(getIntent());

	mState = (savedStates == null) ? STATE_INIT : STATE_RUNNING;

	if (mState == STATE_INIT) {
	if (!mCredentials.containsAnyRawData()) {
	toastErrorAndFinish(R.string.no_cert_to_saved);
	finish();
	} else if (mCredentials.hasPkcs12KeyStore()) {
	showDialog(PKCS12_PASSWORD_DIALOG);
	} else {
	MyAction action = new InstallOthersAction();
	if (needsKeyStoreAccess()) {
	sendUnlockKeyStoreIntent();
	mNextAction = action;
	} else {
	action.run(this);
	}
	}
	} else {
	mCredentials.onRestoreStates(savedStates);
	mNextAction = (MyAction)
	savedStates.getSerializable(NEXT_ACTION_KEY);
	}
	}

	@Override
	protected void onResume() {
	super.onResume();

	if (mState == STATE_INIT) {
	mState = STATE_RUNNING;
	} else {
	if (mNextAction != null) {
	mNextAction.run(this);
	}
	}
	}

	private boolean needsKeyStoreAccess() {
	return ((mCredentials.hasKeyPair() \|\| mCredentials.hasUserCertificate())
	&& (mKeyStore.state() != KeyStore.State.UNLOCKED));
	}

	@Override
	protected void onPause() {
	super.onPause();
	mState = STATE_PAUSED;
	}

	@Override
	protected void onSaveInstanceState(Bundle outStates) {
	super.onSaveInstanceState(outStates);
	mCredentials.onSaveStates(outStates);
	if (mNextAction != null) {
	outStates.putSerializable(NEXT_ACTION_KEY, mNextAction);
	}
	}

	@Override
	protected Dialog onCreateDialog (int dialogId) {
	switch (dialogId) {
	case PKCS12_PASSWORD_DIALOG:
	return createPkcs12PasswordDialog();

	case NAME_CREDENTIAL_DIALOG:
	return createNameCredentialDialog();

	case PROGRESS_BAR_DIALOG:
	ProgressDialog dialog = new ProgressDialog(this);
	dialog.setMessage(getString(R.string.extracting_pkcs12));
	dialog.setIndeterminate(true);
	dialog.setCancelable(false);
	return dialog;

	default:
	return null;
	}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	if (requestCode == REQUEST_SYSTEM_INSTALL_CODE) {
	if (resultCode == RESULT_OK) {
	Log.d(TAG, "credential is added: " + mCredentials.getName());
	Toast.makeText(this, getString(R.string.cert_is_added,
	mCredentials.getName()), Toast.LENGTH_LONG).show();

	if (mCredentials.hasCaCerts()) {
	// more work to do, don't finish just yet
	new InstallCaCertsToKeyChainTask().execute();
	return;
	}
	setResult(RESULT_OK);
	} else {
	Log.d(TAG, "credential not saved, err: " + resultCode);
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	} else {
	Log.w(TAG, "unknown request code: " + requestCode);
	}
	finish();
	}

	private class InstallCaCertsToKeyChainTask extends AsyncTask<Void, Void, Boolean> {

	@Override protected Boolean doInBackground(Void... unused) {
	try {
	KeyChainConnection keyChainConnection = KeyChain.bind(CertInstaller.this);
	try {
	return mCredentials.installCaCertsToKeyChain(keyChainConnection.getService());
	} finally {
	keyChainConnection.close();
	}
	} catch (InterruptedException e) {
	Thread.currentThread().interrupt();
	return false;
	}
	}

	@Override protected void onPostExecute(Boolean success) {
	if (success) {
	setResult(RESULT_OK);
	}
	finish();
	}
	}

	void installOthers() {
	if (mCredentials.hasKeyPair()) {
	saveKeyPair();
	finish();
	} else {
	X509Certificate cert = mCredentials.getUserCertificate();
	if (cert != null) {
	// find matched private key
	String key = Util.toMd5(cert.getPublicKey().getEncoded());
	Map<String, byte[]> map = getPkeyMap();
	byte[] privatekey = map.get(key);
	if (privatekey != null) {
	Log.d(TAG, "found matched key: " + privatekey);
	map.remove(key);
	savePkeyMap(map);

	mCredentials.setPrivateKey(privatekey);
	} else {
	Log.d(TAG, "didn't find matched private key: " + key);
	}
	}
	nameCredential();
	}
	}

	private void sendUnlockKeyStoreIntent() {
	Credentials.getInstance().unlock(this);
	}

	private void nameCredential() {
	if (!mCredentials.hasAnyForSystemInstall()) {
	toastErrorAndFinish(R.string.no_cert_to_saved);
	} else {
	showDialog(NAME_CREDENTIAL_DIALOG);
	}
	}

	private void saveKeyPair() {
	byte[] privatekey = mCredentials.getData(Credentials.EXTRA_PRIVATE_KEY);
	String key = Util.toMd5(mCredentials.getData(Credentials.EXTRA_PUBLIC_KEY));
	Map<String, byte[]> map = getPkeyMap();
	map.put(key, privatekey);
	savePkeyMap(map);
	Log.d(TAG, "save privatekey: " + key + " --> #keys:" + map.size());
	}

	private void savePkeyMap(Map<String, byte[]> map) {
	if (map.isEmpty()) {
	if (!mKeyStore.delete(PKEY_MAP_KEY)) {
	Log.w(TAG, "savePkeyMap(): failed to delete pkey map");
	}
	return;
	}
	byte[] bytes = Util.toBytes(map);
	if (!mKeyStore.put(PKEY_MAP_KEY, bytes)) {
	Log.w(TAG, "savePkeyMap(): failed to write pkey map");
	}
	}

	private Map<String, byte[]> getPkeyMap() {
	byte[] bytes = mKeyStore.get(PKEY_MAP_KEY);
	if (bytes != null) {
	Map<String, byte[]> map =
	(Map<String, byte[]>) Util.fromBytes(bytes);
	if (map != null) return map;
	}
	return new MyMap();
	}

	void extractPkcs12InBackground(final String password) {
	// show progress bar and extract certs in a background thread
	showDialog(PROGRESS_BAR_DIALOG);

	new AsyncTask<Void,Void,Boolean>() {
	@Override protected Boolean doInBackground(Void... unused) {
	return mCredentials.extractPkcs12(password);
	}
	@Override protected void onPostExecute(Boolean success) {
	MyAction action = new OnExtractionDoneAction(success);
	if (mState == STATE_PAUSED) {
	// activity is paused; run it in next onResume()
	mNextAction = action;
	} else {
	action.run(CertInstaller.this);
	}
	}
	}.execute();
	}

	void onExtractionDone(boolean success) {
	mNextAction = null;
	removeDialog(PROGRESS_BAR_DIALOG);
	if (success) {
	removeDialog(PKCS12_PASSWORD_DIALOG);
	nameCredential();
	} else {
	mView.setText(R.id.credential_password, "");
	mView.showError(R.string.password_error);
	showDialog(PKCS12_PASSWORD_DIALOG);
	}
	}

	private Dialog createPkcs12PasswordDialog() {
	View view = View.inflate(this, R.layout.password_dialog, null);
	mView.setView(view);
	if (mView.getHasEmptyError()) {
	mView.showError(R.string.password_empty_error);
	mView.setHasEmptyError(false);
	}

	String title = mCredentials.getName();
	title = TextUtils.isEmpty(title)
	? getString(R.string.pkcs12_password_dialog_title)
	: getString(R.string.pkcs12_file_password_dialog_title, title);
	Dialog d = new AlertDialog.Builder(this)
	.setView(view)
	.setTitle(title)
	.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int id) {
	String password = mView.getText(R.id.credential_password);
	mNextAction = new Pkcs12ExtractAction(password);
	mNextAction.run(CertInstaller.this);
	}
	})
	.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int id) {
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	})
	.create();
	d.setOnCancelListener(new DialogInterface.OnCancelListener() {
	@Override public void onCancel(DialogInterface dialog) {
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	});
	return d;
	}

	private Dialog createNameCredentialDialog() {
	ViewGroup view = (ViewGroup) View.inflate(this, R.layout.name_credential_dialog, null);
	mView.setView(view);
	if (mView.getHasEmptyError()) {
	mView.showError(R.string.name_empty_error);
	mView.setHasEmptyError(false);
	}
	mView.setText(R.id.credential_info, mCredentials.getDescription(this).toString());
	final EditText nameInput = (EditText) view.findViewById(R.id.credential_name);
	nameInput.setText(getDefaultName());
	nameInput.selectAll();
	Dialog d = new AlertDialog.Builder(this)
	.setView(view)
	.setTitle(R.string.name_credential_dialog_title)
	.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int id) {
	String name = mView.getText(R.id.credential_name);
	if (TextUtils.isEmpty(name)) {
	mView.setHasEmptyError(true);
	removeDialog(NAME_CREDENTIAL_DIALOG);
	showDialog(NAME_CREDENTIAL_DIALOG);
	} else {
	removeDialog(NAME_CREDENTIAL_DIALOG);
	mCredentials.setName(name);

	// install everything to system keystore
	try {
	startActivityForResult(
	mCredentials.createSystemInstallIntent(),
	REQUEST_SYSTEM_INSTALL_CODE);
	} catch (ActivityNotFoundException e) {
	Log.w(TAG, "systemInstall(): " + e);
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	}
	}
	})
	.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int id) {
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	})
	.create();
	d.setOnCancelListener(new DialogInterface.OnCancelListener() {
	@Override public void onCancel(DialogInterface dialog) {
	toastErrorAndFinish(R.string.cert_not_saved);
	}
	});
	return d;
	}

	private String getDefaultName() {
	String name = mCredentials.getName();
	if (TextUtils.isEmpty(name)) {
	return null;
	} else {
	// remove the extension from the file name
	int index = name.lastIndexOf(".");
	if (index > 0) name = name.substring(0, index);
	return name;
	}
	}

	private void toastErrorAndFinish(int msgId) {
	Toast.makeText(this, msgId, Toast.LENGTH_SHORT).show();
	finish();
	}

	private static class MyMap extends LinkedHashMap<String, byte[]>
	implements Serializable {
	private static final long serialVersionUID = 1L;

	@Override
	protected boolean removeEldestEntry(Map.Entry eldest) {
	// Note: one key takes about 1300 bytes in the keystore, so be
	// cautious about allowing more outstanding keys in the map that
	// may go beyond keystore's max length for one entry.
	return (size() > 3);
	}
	}

	private interface MyAction extends Serializable {
	void run(CertInstaller host);
	}

	private static class Pkcs12ExtractAction implements MyAction {
	private final String mPassword;
	private transient boolean hasRun;

	Pkcs12ExtractAction(String password) {
	mPassword = password;
	}

	public void run(CertInstaller host) {
	if (hasRun) {
	return;
	}
	hasRun = true;
	host.extractPkcs12InBackground(mPassword);
	}
	}

	private static class InstallOthersAction implements MyAction {
	public void run(CertInstaller host) {
	host.mNextAction = null;
	host.installOthers();
	}
	}

	private static class OnExtractionDoneAction implements MyAction {
	private final boolean mSuccess;

	OnExtractionDoneAction(boolean success) {
	mSuccess = success;
	}

	public void run(CertInstaller host) {
	host.onExtractionDone(mSuccess);
	}
	}
	}