src/com/android/settings/vpn2/VpnDialog.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2011 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.settings.vpn2;

 import com.android.internal.net.VpnProfile;
 import com.android.settings.R;

 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.security.Credentials;
 import android.security.KeyStore;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.Spinner;
 import android.widget.TextView;

 import java.net.InetAddress;

 class VpnDialog extends AlertDialog implements TextWatcher,
         View.OnClickListener, AdapterView.OnItemSelectedListener {
     private final KeyStore mKeyStore = KeyStore.getInstance();
     private final DialogInterface.OnClickListener mListener;
     private final VpnProfile mProfile;

     private boolean mEditing;

     private View mView;

     private TextView mName;
     private Spinner mType;
     private TextView mServer;
     private TextView mUsername;
     private TextView mPassword;
     private TextView mSearchDomains;
     private TextView mDnsServers;
     private TextView mRoutes;
     private CheckBox mMppe;
     private TextView mL2tpSecret;
     private TextView mIpsecIdentifier;
     private TextView mIpsecSecret;
     private Spinner mIpsecUserCert;
     private Spinner mIpsecCaCert;
     private Spinner mIpsecServerCert;
     private CheckBox mSaveLogin;

     VpnDialog(Context context, DialogInterface.OnClickListener listener,
             VpnProfile profile, boolean editing) {
         super(context);
         mListener = listener;
         mProfile = profile;
         mEditing = editing;
     }

     @Override
     protected void onCreate(Bundle savedState) {
         mView = getLayoutInflater().inflate(R.layout.vpn_dialog, null);
         setView(mView);
         setInverseBackgroundForced(true);

         Context context = getContext();

         // First, find out all the fields.
         mName = (TextView) mView.findViewById(R.id.name);
         mType = (Spinner) mView.findViewById(R.id.type);
         mServer = (TextView) mView.findViewById(R.id.server);
         mUsername = (TextView) mView.findViewById(R.id.username);
         mPassword = (TextView) mView.findViewById(R.id.password);
         mSearchDomains = (TextView) mView.findViewById(R.id.search_domains);
         mDnsServers = (TextView) mView.findViewById(R.id.dns_servers);
         mRoutes = (TextView) mView.findViewById(R.id.routes);
         mMppe = (CheckBox) mView.findViewById(R.id.mppe);
         mL2tpSecret = (TextView) mView.findViewById(R.id.l2tp_secret);
         mIpsecIdentifier = (TextView) mView.findViewById(R.id.ipsec_identifier);
         mIpsecSecret = (TextView) mView.findViewById(R.id.ipsec_secret);
         mIpsecUserCert = (Spinner) mView.findViewById(R.id.ipsec_user_cert);
         mIpsecCaCert = (Spinner) mView.findViewById(R.id.ipsec_ca_cert);
         mIpsecServerCert = (Spinner) mView.findViewById(R.id.ipsec_server_cert);
         mSaveLogin = (CheckBox) mView.findViewById(R.id.save_login);

         // Second, copy values from the profile.
         mName.setText(mProfile.name);
         mType.setSelection(mProfile.type);
         mServer.setText(mProfile.server);
         if (mProfile.saveLogin) {
             mUsername.setText(mProfile.username);
             mPassword.setText(mProfile.password);
         }
         mSearchDomains.setText(mProfile.searchDomains);
         mDnsServers.setText(mProfile.dnsServers);
         mRoutes.setText(mProfile.routes);
         mMppe.setChecked(mProfile.mppe);
         mL2tpSecret.setText(mProfile.l2tpSecret);
         mIpsecIdentifier.setText(mProfile.ipsecIdentifier);
         mIpsecSecret.setText(mProfile.ipsecSecret);
         loadCertificates(mIpsecUserCert, Credentials.USER_PRIVATE_KEY,
                 0, mProfile.ipsecUserCert);
         loadCertificates(mIpsecCaCert, Credentials.CA_CERTIFICATE,
                 R.string.vpn_no_ca_cert, mProfile.ipsecCaCert);
         loadCertificates(mIpsecServerCert, Credentials.USER_CERTIFICATE,
                 R.string.vpn_no_server_cert, mProfile.ipsecServerCert);
         mSaveLogin.setChecked(mProfile.saveLogin);

         // Third, add listeners to required fields.
         mName.addTextChangedListener(this);
         mType.setOnItemSelectedListener(this);
         mServer.addTextChangedListener(this);
         mUsername.addTextChangedListener(this);
         mPassword.addTextChangedListener(this);
         mDnsServers.addTextChangedListener(this);
         mRoutes.addTextChangedListener(this);
         mIpsecSecret.addTextChangedListener(this);
         mIpsecUserCert.setOnItemSelectedListener(this);

         // Forth, determine to do editing or connecting.
         boolean valid = validate(true);
         mEditing = mEditing || !valid;

         if (mEditing) {
             setTitle(R.string.vpn_edit);

             // Show common fields.
             mView.findViewById(R.id.editor).setVisibility(View.VISIBLE);

             // Show type-specific fields.
             changeType(mProfile.type);

             // Show advanced options directly if any of them is set.
             View showOptions = mView.findViewById(R.id.show_options);
             if (mProfile.searchDomains.isEmpty() && mProfile.dnsServers.isEmpty() &&
                     mProfile.routes.isEmpty()) {
                 showOptions.setOnClickListener(this);
             } else {
                 onClick(showOptions);
             }

             // Create a button to save the profile.
             setButton(DialogInterface.BUTTON_POSITIVE,
                     context.getString(R.string.vpn_save), mListener);
         } else {
             setTitle(context.getString(R.string.vpn_connect_to, mProfile.name));

             // Not editing, just show username and password.
             mView.findViewById(R.id.login).setVisibility(View.VISIBLE);

             // Create a button to connect the network.
             setButton(DialogInterface.BUTTON_POSITIVE,
                     context.getString(R.string.vpn_connect), mListener);
         }

         // Always provide a cancel button.
         setButton(DialogInterface.BUTTON_NEGATIVE,
                 context.getString(R.string.vpn_cancel), mListener);

         // Let AlertDialog create everything.
         super.onCreate(null);

         // Disable the action button if necessary.
         getButton(DialogInterface.BUTTON_POSITIVE)
                 .setEnabled(mEditing ? valid : validate(false));

         // Workaround to resize the dialog for the input method.
         getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE |
                 WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
     }

     @Override
     public void afterTextChanged(Editable field) {
         getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(validate(mEditing));
     }

     @Override
     public void beforeTextChanged(CharSequence s, int start, int count, int after) {
     }

     @Override
     public void onTextChanged(CharSequence s, int start, int before, int count) {
     }

     @Override
     public void onClick(View showOptions) {
         showOptions.setVisibility(View.GONE);
         mView.findViewById(R.id.options).setVisibility(View.VISIBLE);
     }

     @Override
     public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
         if (parent == mType) {
             changeType(position);
         }
         getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(validate(mEditing));
     }

     @Override
     public void onNothingSelected(AdapterView<?> parent) {
     }

     private void changeType(int type) {
         // First, hide everything.
         mMppe.setVisibility(View.GONE);
         mView.findViewById(R.id.l2tp).setVisibility(View.GONE);
         mView.findViewById(R.id.ipsec_psk).setVisibility(View.GONE);
         mView.findViewById(R.id.ipsec_user).setVisibility(View.GONE);
         mView.findViewById(R.id.ipsec_peer).setVisibility(View.GONE);

         // Then, unhide type-specific fields.
         switch (type) {
             case VpnProfile.TYPE_PPTP:
                 mMppe.setVisibility(View.VISIBLE);
                 break;

             case VpnProfile.TYPE_L2TP_IPSEC_PSK:
                 mView.findViewById(R.id.l2tp).setVisibility(View.VISIBLE);
                 // fall through
             case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
                 mView.findViewById(R.id.ipsec_psk).setVisibility(View.VISIBLE);
                 break;

             case VpnProfile.TYPE_L2TP_IPSEC_RSA:
                 mView.findViewById(R.id.l2tp).setVisibility(View.VISIBLE);
                 // fall through
             case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
                 mView.findViewById(R.id.ipsec_user).setVisibility(View.VISIBLE);
                 // fall through
             case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
                 mView.findViewById(R.id.ipsec_peer).setVisibility(View.VISIBLE);
                 break;
         }
     }

     private boolean validate(boolean editing) {
         if (!editing) {
             return mUsername.getText().length() != 0 && mPassword.getText().length() != 0;
         }
         if (mName.getText().length() == 0 || mServer.getText().length() == 0 ||
                 !validateAddresses(mDnsServers.getText().toString(), false) ||
                 !validateAddresses(mRoutes.getText().toString(), true)) {
             return false;
         }
         switch (mType.getSelectedItemPosition()) {
             case VpnProfile.TYPE_PPTP:
             case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
                 return true;

             case VpnProfile.TYPE_L2TP_IPSEC_PSK:
             case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
                 return mIpsecSecret.getText().length() != 0;

             case VpnProfile.TYPE_L2TP_IPSEC_RSA:
             case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
                 return mIpsecUserCert.getSelectedItemPosition() != 0;
         }
         return false;
     }

     private boolean validateAddresses(String addresses, boolean cidr) {
         try {
             for (String address : addresses.split(" ")) {
                 if (address.isEmpty()) {
                     continue;
                 }
                 // Legacy VPN currently only supports IPv4.
                 int prefixLength = 32;
                 if (cidr) {
                     String[] parts = address.split("/", 2);
                     address = parts[0];
                     prefixLength = Integer.parseInt(parts[1]);
                 }
                 byte[] bytes = InetAddress.parseNumericAddress(address).getAddress();
                 int integer = (bytes[3] & 0xFF) | (bytes[2] & 0xFF) << 8 |
                         (bytes[1] & 0xFF) << 16 | (bytes[0] & 0xFF) << 24;
                 if (bytes.length != 4 || prefixLength < 0 || prefixLength > 32 ||
                         (prefixLength < 32 && (integer << prefixLength) != 0)) {
                     return false;
                 }
             }
         } catch (Exception e) {
             return false;
         }
         return true;
     }

     private void loadCertificates(Spinner spinner, String prefix, int firstId, String selected) {
         Context context = getContext();
         String first = (firstId == 0) ? "" : context.getString(firstId);
         String[] certificates = mKeyStore.saw(prefix);

         if (certificates == null || certificates.length == 0) {
             certificates = new String[] {first};
         } else {
             String[] array = new String[certificates.length + 1];
             array[0] = first;
             System.arraycopy(certificates, 0, array, 1, certificates.length);
             certificates = array;
         }

         ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                 context, android.R.layout.simple_spinner_item, certificates);
         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
         spinner.setAdapter(adapter);

         for (int i = 1; i < certificates.length; ++i) {
             if (certificates[i].equals(selected)) {
                 spinner.setSelection(i);
                 break;
             }
         }
     }

     boolean isEditing() {
         return mEditing;
     }

     VpnProfile getProfile() {
         // First, save common fields.
         VpnProfile profile = new VpnProfile(mProfile.key);
         profile.name = mName.getText().toString();
         profile.type = mType.getSelectedItemPosition();
         profile.server = mServer.getText().toString().trim();
         profile.username = mUsername.getText().toString();
         profile.password = mPassword.getText().toString();
         profile.searchDomains = mSearchDomains.getText().toString().trim();
         profile.dnsServers = mDnsServers.getText().toString().trim();
         profile.routes = mRoutes.getText().toString().trim();

         // Then, save type-specific fields.
         switch (profile.type) {
             case VpnProfile.TYPE_PPTP:
                 profile.mppe = mMppe.isChecked();
                 break;

             case VpnProfile.TYPE_L2TP_IPSEC_PSK:
                 profile.l2tpSecret = mL2tpSecret.getText().toString();
                 // fall through
             case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
                 profile.ipsecIdentifier = mIpsecIdentifier.getText().toString();
                 profile.ipsecSecret = mIpsecSecret.getText().toString();
                 break;

             case VpnProfile.TYPE_L2TP_IPSEC_RSA:
                 profile.l2tpSecret = mL2tpSecret.getText().toString();
                 // fall through
             case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
                 if (mIpsecUserCert.getSelectedItemPosition() != 0) {
                     profile.ipsecUserCert = (String) mIpsecUserCert.getSelectedItem();
                 }
                 // fall through
             case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
                 if (mIpsecCaCert.getSelectedItemPosition() != 0) {
                     profile.ipsecCaCert = (String) mIpsecCaCert.getSelectedItem();
                 }
                 if (mIpsecServerCert.getSelectedItemPosition() != 0) {
                     profile.ipsecServerCert = (String) mIpsecServerCert.getSelectedItem();
                 }
                 break;
         }

         profile.saveLogin = mSaveLogin.isChecked();
         return profile;
     }
 }
	/*
	* Copyright (C) 2011 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.settings.vpn2;

	import com.android.internal.net.VpnProfile;
	import com.android.settings.R;

	import android.app.AlertDialog;
	import android.content.Context;
	import android.content.DialogInterface;
	import android.os.Bundle;
	import android.security.Credentials;
	import android.security.KeyStore;
	import android.text.Editable;
	import android.text.TextWatcher;
	import android.view.View;
	import android.view.WindowManager;
	import android.widget.AdapterView;
	import android.widget.ArrayAdapter;
	import android.widget.Button;
	import android.widget.CheckBox;
	import android.widget.Spinner;
	import android.widget.TextView;

	import java.net.InetAddress;

	class VpnDialog extends AlertDialog implements TextWatcher,
	View.OnClickListener, AdapterView.OnItemSelectedListener {
	private final KeyStore mKeyStore = KeyStore.getInstance();
	private final DialogInterface.OnClickListener mListener;
	private final VpnProfile mProfile;

	private boolean mEditing;

	private View mView;

	private TextView mName;
	private Spinner mType;
	private TextView mServer;
	private TextView mUsername;
	private TextView mPassword;
	private TextView mSearchDomains;
	private TextView mDnsServers;
	private TextView mRoutes;
	private CheckBox mMppe;
	private TextView mL2tpSecret;
	private TextView mIpsecIdentifier;
	private TextView mIpsecSecret;
	private Spinner mIpsecUserCert;
	private Spinner mIpsecCaCert;
	private Spinner mIpsecServerCert;
	private CheckBox mSaveLogin;

	VpnDialog(Context context, DialogInterface.OnClickListener listener,
	VpnProfile profile, boolean editing) {
	super(context);
	mListener = listener;
	mProfile = profile;
	mEditing = editing;
	}

	@Override
	protected void onCreate(Bundle savedState) {
	mView = getLayoutInflater().inflate(R.layout.vpn_dialog, null);
	setView(mView);
	setInverseBackgroundForced(true);

	Context context = getContext();

	// First, find out all the fields.
	mName = (TextView) mView.findViewById(R.id.name);
	mType = (Spinner) mView.findViewById(R.id.type);
	mServer = (TextView) mView.findViewById(R.id.server);
	mUsername = (TextView) mView.findViewById(R.id.username);
	mPassword = (TextView) mView.findViewById(R.id.password);
	mSearchDomains = (TextView) mView.findViewById(R.id.search_domains);
	mDnsServers = (TextView) mView.findViewById(R.id.dns_servers);
	mRoutes = (TextView) mView.findViewById(R.id.routes);
	mMppe = (CheckBox) mView.findViewById(R.id.mppe);
	mL2tpSecret = (TextView) mView.findViewById(R.id.l2tp_secret);
	mIpsecIdentifier = (TextView) mView.findViewById(R.id.ipsec_identifier);
	mIpsecSecret = (TextView) mView.findViewById(R.id.ipsec_secret);
	mIpsecUserCert = (Spinner) mView.findViewById(R.id.ipsec_user_cert);
	mIpsecCaCert = (Spinner) mView.findViewById(R.id.ipsec_ca_cert);
	mIpsecServerCert = (Spinner) mView.findViewById(R.id.ipsec_server_cert);
	mSaveLogin = (CheckBox) mView.findViewById(R.id.save_login);

	// Second, copy values from the profile.
	mName.setText(mProfile.name);
	mType.setSelection(mProfile.type);
	mServer.setText(mProfile.server);
	if (mProfile.saveLogin) {
	mUsername.setText(mProfile.username);
	mPassword.setText(mProfile.password);
	}
	mSearchDomains.setText(mProfile.searchDomains);
	mDnsServers.setText(mProfile.dnsServers);
	mRoutes.setText(mProfile.routes);
	mMppe.setChecked(mProfile.mppe);
	mL2tpSecret.setText(mProfile.l2tpSecret);
	mIpsecIdentifier.setText(mProfile.ipsecIdentifier);
	mIpsecSecret.setText(mProfile.ipsecSecret);
	loadCertificates(mIpsecUserCert, Credentials.USER_PRIVATE_KEY,
	0, mProfile.ipsecUserCert);
	loadCertificates(mIpsecCaCert, Credentials.CA_CERTIFICATE,
	R.string.vpn_no_ca_cert, mProfile.ipsecCaCert);
	loadCertificates(mIpsecServerCert, Credentials.USER_CERTIFICATE,
	R.string.vpn_no_server_cert, mProfile.ipsecServerCert);
	mSaveLogin.setChecked(mProfile.saveLogin);

	// Third, add listeners to required fields.
	mName.addTextChangedListener(this);
	mType.setOnItemSelectedListener(this);
	mServer.addTextChangedListener(this);
	mUsername.addTextChangedListener(this);
	mPassword.addTextChangedListener(this);
	mDnsServers.addTextChangedListener(this);
	mRoutes.addTextChangedListener(this);
	mIpsecSecret.addTextChangedListener(this);
	mIpsecUserCert.setOnItemSelectedListener(this);

	// Forth, determine to do editing or connecting.
	boolean valid = validate(true);
	mEditing = mEditing \|\| !valid;

	if (mEditing) {
	setTitle(R.string.vpn_edit);

	// Show common fields.
	mView.findViewById(R.id.editor).setVisibility(View.VISIBLE);

	// Show type-specific fields.
	changeType(mProfile.type);

	// Show advanced options directly if any of them is set.
	View showOptions = mView.findViewById(R.id.show_options);
	if (mProfile.searchDomains.isEmpty() && mProfile.dnsServers.isEmpty() &&
	mProfile.routes.isEmpty()) {
	showOptions.setOnClickListener(this);
	} else {
	onClick(showOptions);
	}

	// Create a button to save the profile.
	setButton(DialogInterface.BUTTON_POSITIVE,
	context.getString(R.string.vpn_save), mListener);
	} else {
	setTitle(context.getString(R.string.vpn_connect_to, mProfile.name));

	// Not editing, just show username and password.
	mView.findViewById(R.id.login).setVisibility(View.VISIBLE);

	// Create a button to connect the network.
	setButton(DialogInterface.BUTTON_POSITIVE,
	context.getString(R.string.vpn_connect), mListener);
	}

	// Always provide a cancel button.
	setButton(DialogInterface.BUTTON_NEGATIVE,
	context.getString(R.string.vpn_cancel), mListener);

	// Let AlertDialog create everything.
	super.onCreate(null);

	// Disable the action button if necessary.
	getButton(DialogInterface.BUTTON_POSITIVE)
	.setEnabled(mEditing ? valid : validate(false));

	// Workaround to resize the dialog for the input method.
	getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE \|
	WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
	}

	@Override
	public void afterTextChanged(Editable field) {
	getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(validate(mEditing));
	}

	@Override
	public void beforeTextChanged(CharSequence s, int start, int count, int after) {
	}

	@Override
	public void onTextChanged(CharSequence s, int start, int before, int count) {
	}

	@Override
	public void onClick(View showOptions) {
	showOptions.setVisibility(View.GONE);
	mView.findViewById(R.id.options).setVisibility(View.VISIBLE);
	}

	@Override
	public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
	if (parent == mType) {
	changeType(position);
	}
	getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(validate(mEditing));
	}

	@Override
	public void onNothingSelected(AdapterView<?> parent) {
	}

	private void changeType(int type) {
	// First, hide everything.
	mMppe.setVisibility(View.GONE);
	mView.findViewById(R.id.l2tp).setVisibility(View.GONE);
	mView.findViewById(R.id.ipsec_psk).setVisibility(View.GONE);
	mView.findViewById(R.id.ipsec_user).setVisibility(View.GONE);
	mView.findViewById(R.id.ipsec_peer).setVisibility(View.GONE);

	// Then, unhide type-specific fields.
	switch (type) {
	case VpnProfile.TYPE_PPTP:
	mMppe.setVisibility(View.VISIBLE);
	break;

	case VpnProfile.TYPE_L2TP_IPSEC_PSK:
	mView.findViewById(R.id.l2tp).setVisibility(View.VISIBLE);
	// fall through
	case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
	mView.findViewById(R.id.ipsec_psk).setVisibility(View.VISIBLE);
	break;

	case VpnProfile.TYPE_L2TP_IPSEC_RSA:
	mView.findViewById(R.id.l2tp).setVisibility(View.VISIBLE);
	// fall through
	case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
	mView.findViewById(R.id.ipsec_user).setVisibility(View.VISIBLE);
	// fall through
	case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
	mView.findViewById(R.id.ipsec_peer).setVisibility(View.VISIBLE);
	break;
	}
	}

	private boolean validate(boolean editing) {
	if (!editing) {
	return mUsername.getText().length() != 0 && mPassword.getText().length() != 0;
	}
	if (mName.getText().length() == 0 \|\| mServer.getText().length() == 0 \|\|
	!validateAddresses(mDnsServers.getText().toString(), false) \|\|
	!validateAddresses(mRoutes.getText().toString(), true)) {
	return false;
	}
	switch (mType.getSelectedItemPosition()) {
	case VpnProfile.TYPE_PPTP:
	case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
	return true;

	case VpnProfile.TYPE_L2TP_IPSEC_PSK:
	case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
	return mIpsecSecret.getText().length() != 0;

	case VpnProfile.TYPE_L2TP_IPSEC_RSA:
	case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
	return mIpsecUserCert.getSelectedItemPosition() != 0;
	}
	return false;
	}

	private boolean validateAddresses(String addresses, boolean cidr) {
	try {
	for (String address : addresses.split(" ")) {
	if (address.isEmpty()) {
	continue;
	}
	// Legacy VPN currently only supports IPv4.
	int prefixLength = 32;
	if (cidr) {
	String[] parts = address.split("/", 2);
	address = parts[0];
	prefixLength = Integer.parseInt(parts[1]);
	}
	byte[] bytes = InetAddress.parseNumericAddress(address).getAddress();
	int integer = (bytes[3] & 0xFF) \| (bytes[2] & 0xFF) << 8 \|
	(bytes[1] & 0xFF) << 16 \| (bytes[0] & 0xFF) << 24;
	if (bytes.length != 4 \|\| prefixLength < 0 \|\| prefixLength > 32 \|\|
	(prefixLength < 32 && (integer << prefixLength) != 0)) {
	return false;
	}
	}
	} catch (Exception e) {
	return false;
	}
	return true;
	}

	private void loadCertificates(Spinner spinner, String prefix, int firstId, String selected) {
	Context context = getContext();
	String first = (firstId == 0) ? "" : context.getString(firstId);
	String[] certificates = mKeyStore.saw(prefix);

	if (certificates == null \|\| certificates.length == 0) {
	certificates = new String[] {first};
	} else {
	String[] array = new String[certificates.length + 1];
	array[0] = first;
	System.arraycopy(certificates, 0, array, 1, certificates.length);
	certificates = array;
	}

	ArrayAdapter<String> adapter = new ArrayAdapter<String>(
	context, android.R.layout.simple_spinner_item, certificates);
	adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
	spinner.setAdapter(adapter);

	for (int i = 1; i < certificates.length; ++i) {
	if (certificates[i].equals(selected)) {
	spinner.setSelection(i);
	break;
	}
	}
	}

	boolean isEditing() {
	return mEditing;
	}

	VpnProfile getProfile() {
	// First, save common fields.
	VpnProfile profile = new VpnProfile(mProfile.key);
	profile.name = mName.getText().toString();
	profile.type = mType.getSelectedItemPosition();
	profile.server = mServer.getText().toString().trim();
	profile.username = mUsername.getText().toString();
	profile.password = mPassword.getText().toString();
	profile.searchDomains = mSearchDomains.getText().toString().trim();
	profile.dnsServers = mDnsServers.getText().toString().trim();
	profile.routes = mRoutes.getText().toString().trim();

	// Then, save type-specific fields.
	switch (profile.type) {
	case VpnProfile.TYPE_PPTP:
	profile.mppe = mMppe.isChecked();
	break;

	case VpnProfile.TYPE_L2TP_IPSEC_PSK:
	profile.l2tpSecret = mL2tpSecret.getText().toString();
	// fall through
	case VpnProfile.TYPE_IPSEC_XAUTH_PSK:
	profile.ipsecIdentifier = mIpsecIdentifier.getText().toString();
	profile.ipsecSecret = mIpsecSecret.getText().toString();
	break;

	case VpnProfile.TYPE_L2TP_IPSEC_RSA:
	profile.l2tpSecret = mL2tpSecret.getText().toString();
	// fall through
	case VpnProfile.TYPE_IPSEC_XAUTH_RSA:
	if (mIpsecUserCert.getSelectedItemPosition() != 0) {
	profile.ipsecUserCert = (String) mIpsecUserCert.getSelectedItem();
	}
	// fall through
	case VpnProfile.TYPE_IPSEC_HYBRID_RSA:
	if (mIpsecCaCert.getSelectedItemPosition() != 0) {
	profile.ipsecCaCert = (String) mIpsecCaCert.getSelectedItem();
	}
	if (mIpsecServerCert.getSelectedItemPosition() != 0) {
	profile.ipsecServerCert = (String) mIpsecServerCert.getSelectedItem();
	}
	break;
	}

	profile.saveLogin = mSaveLogin.isChecked();
	return profile;
	}
	}