added proxy/tor preferences

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/Constants.java

@@ -91,6 +91,17 @@ public final class Constants {
         public static final String FILE_USE_COMPRESSION = "useFileCompression";
         public static final String TEXT_USE_COMPRESSION = "useTextCompression";
         public static final String USE_ARMOR = "useArmor";
+        // proxy settings
+        public static final String USE_NORMAL_PROXY = "useNormalProxy";
+        public static final String USE_TOR_PROXY = "useTorProxy";
+        public static final String PROXY_HOST = "proxyHost";
+        public static final String PROXY_PORT = "proxyPort";
+    }
+
+    public static final class ProxyOrbot {
+        public static final String PROXY_HOST = "127.0.0.1";
+        public static final int PROXY_HTTP_PORT = 8118;
+        public static final int PROXY_SOCKS_PORT = 9050;
     }
 
     public static final class Defaults {

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/SettingsActivity.java

@@ -23,6 +23,7 @@ import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.CheckBoxPreference;
+import android.preference.EditTextPreference;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceFragment;
@@ -35,8 +36,11 @@ import android.widget.LinearLayout;
 import org.spongycastle.bcpg.CompressionAlgorithmTags;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.ui.util.Notify;
 import org.sufficientlysecure.keychain.ui.widget.IntegerListPreference;
+import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.Preferences;
+import org.sufficientlysecure.keychain.util.orbot.OrbotHelper;
 
 import java.util.List;
 
@@ -270,6 +274,145 @@ public class SettingsActivity extends PreferenceActivity {
         }
     }
 
+    public static class ProxyPrefsFragment extends PreferenceFragment {
+        private CheckBoxPreference mUseTor;
+        private CheckBoxPreference mUseNormalProxy;
+        private EditTextPreference mProxyHost;
+        private EditTextPreference mProxyPort;
+
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.proxy_prefs);
+
+            mUseTor = (CheckBoxPreference) findPreference(Constants.Pref.USE_TOR_PROXY);
+            mUseNormalProxy = (CheckBoxPreference) findPreference(Constants.Pref.USE_NORMAL_PROXY);
+            mProxyHost = (EditTextPreference) findPreference(Constants.Pref.PROXY_HOST);
+            mProxyPort = (EditTextPreference) findPreference(Constants.Pref.PROXY_PORT);
+
+            initializeUseTorPref();
+            initializeUseNormalProxyPref();
+            initialiseEditTextPreferences();
+
+            if (mUseTor.isChecked()) disableNormalProxyPrefs();
+            else if (mUseNormalProxy.isChecked()) disableUseTorPrefs();
+        }
+
+        private void initializeUseTorPref() {
+            mUseTor.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    if ((Boolean)newValue) {
+                        OrbotHelper orbotHelper = new OrbotHelper(ProxyPrefsFragment.this.getActivity());
+                        boolean installed = orbotHelper.isOrbotInstalled();
+                        if (!installed) {
+                            Log.d(Constants.TAG, "Prompting to install Tor");
+                            orbotHelper.promptToInstall(ProxyPrefsFragment.this.getActivity());
+                            // don't let the user check the box until he's installed orbot
+                            return false;
+                        } else {
+                            disableNormalProxyPrefs();
+                            // let the enable tor box be checked
+                            return true;
+                        }
+                    }
+                    else {
+                        // we're unchecking Tor, so enable other proxy
+                        enableNormalProxyPrefs();
+                        return true;
+                    }
+                }
+            });
+        }
+
+        private void initializeUseNormalProxyPref() {
+            mUseNormalProxy.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    if ((Boolean) newValue) {
+                        disableUseTorPrefs();
+                    } else {
+                        enableUseTorPrefs();
+                    }
+                    return true;
+                }
+            });
+        }
+
+        private void initialiseEditTextPreferences() {
+            mProxyHost.setSummary(mProxyHost.getText());
+            mProxyPort.setSummary(mProxyPort.getText());
+
+            mProxyHost.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    if (newValue.equals("")) {
+                        Notify.create(
+                                ProxyPrefsFragment.this.getActivity(),
+                                R.string.pref_proxy_host_err_invalid,
+                                Notify.Style.ERROR
+                        ).show();
+                        return false;
+                    } else {
+                        mProxyHost.setSummary((CharSequence) newValue);
+                        return true;
+                    }
+                }
+            });
+
+            mProxyPort.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    try {
+                        int port = Integer.parseInt((String) newValue);
+                        if(port < 0 || port > 65535) {
+                            Notify.create(
+                                    ProxyPrefsFragment.this.getActivity(),
+                                    R.string.pref_proxy_port_err_invalid,
+                                    Notify.Style.ERROR
+                            ).show();
+                            return false;
+                        }
+                        // no issues, save port
+                        mProxyPort.setSummary("" + port);
+                        return true;
+                    } catch (NumberFormatException e) {
+                        Notify.create(
+                                ProxyPrefsFragment.this.getActivity(),
+                                R.string.pref_proxy_port_err_invalid,
+                                Notify.Style.ERROR
+                        ).show();
+                        return false;
+                    }
+                }
+            });
+        }
+
+        private void disableNormalProxyPrefs() {
+            mUseNormalProxy.setChecked(false);
+            mUseNormalProxy.setEnabled(false);
+            mProxyHost.setEnabled(false);
+            mProxyPort.setEnabled(false);
+        }
+
+        private void enableNormalProxyPrefs() {
+            mUseNormalProxy.setEnabled(true);
+            mProxyHost.setEnabled(true);
+            mProxyPort.setEnabled(true);
+        }
+
+        private void disableUseTorPrefs() {
+            mUseTor.setChecked(false);
+            mUseTor.setEnabled(false);
+        }
+
+        private void enableUseTorPrefs() {
+            mUseTor.setEnabled(true);
+        }
+    }
+
     @TargetApi(Build.VERSION_CODES.KITKAT)
     protected boolean isValidFragment(String fragmentName) {
         return AdvancedPrefsFragment.class.getName().equals(fragmentName)
@@ -332,7 +475,8 @@ public class SettingsActivity extends PreferenceActivity {
         String[] servers = sPreferences.getKeyServers();
         String serverSummary = context.getResources().getQuantityString(
                 R.plurals.n_keyservers, servers.length, servers.length);
-        return serverSummary + "; " + context.getString(R.string.label_preferred) + ": " + sPreferences.getPreferredKeyserver();
+        return serverSummary + "; " + context.getString(R.string.label_preferred) + ": " + sPreferences
+                .getPreferredKeyserver();
     }
 
     private static void initializeUseDefaultYubiKeyPin(final CheckBoxPreference mUseDefaultYubiKeyPin) {

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java

@@ -224,6 +224,53 @@ public class Preferences {
         return mSharedPreferences.getBoolean(Pref.ENCRYPT_FILENAMES, true);
     }
 
+    public boolean getUseNormalProxy() {
+        return mSharedPreferences.getBoolean(Constants.Pref.USE_NORMAL_PROXY, false);
+    }
+
+    public void setUseNormalProxy(boolean use) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.Pref.USE_NORMAL_PROXY, use);
+        editor.commit();
+    }
+
+    public boolean getUseTorProxy() {
+        return mSharedPreferences.getBoolean(Constants.Pref.USE_TOR_PROXY, false);
+    }
+
+    public void setUseTorProxy(boolean use) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.Pref.USE_TOR_PROXY, use);
+        editor.commit();
+    }
+
+    public String getProxyHost() {
+        return mSharedPreferences.getString(Constants.Pref.PROXY_HOST, null);
+    }
+
+    public void setProxyHost(String host) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putString(Constants.Pref.PROXY_HOST, host);
+        editor.commit();
+    }
+
+    /**
+     * we store port as String for easy interfacing with EditTextPreference, but return it as an integer
+     * @return port number of proxy
+     */
+    public int getProxyPort() {
+        return Integer.parseInt(mSharedPreferences.getString(Pref.PROXY_PORT, "-1"));
+    }
+    /**
+     * we store port as String for easy interfacing with EditTextPreference, but return it as an integer
+     * @param port proxy port
+     */
+    public void setProxyPort(String port) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putString(Pref.PROXY_PORT, port);
+        editor.commit();
+    }
+
     public CloudSearchPrefs getCloudSearchPrefs() {
         return new CloudSearchPrefs(mSharedPreferences.getBoolean(Pref.SEARCH_KEYSERVER, true),
                 mSharedPreferences.getBoolean(Pref.SEARCH_KEYBASE, true),

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/OrbotHelper.java

@@ -0,0 +1,124 @@
+
+package org.sufficientlysecure.keychain.util.orbot;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import org.sufficientlysecure.keychain.R;
+
+
+public class OrbotHelper {
+
+    private final static int REQUEST_CODE_STATUS = 100;
+
+    public final static String ORBOT_PACKAGE_NAME = "org.torproject.android";
+    public final static String TOR_BIN_PATH = "/data/data/org.torproject.android/app_bin/tor";
+
+    public final static String ACTION_START_TOR = "org.torproject.android.START_TOR";
+    public final static String ACTION_REQUEST_HS = "org.torproject.android.REQUEST_HS_PORT";
+    public final static int HS_REQUEST_CODE = 9999;
+
+    private Context mContext = null;
+
+    public OrbotHelper(Context context)
+    {
+        mContext = context;
+    }
+
+    public boolean isOrbotRunning()
+    {
+        int procId = TorServiceUtils.findProcessId(TOR_BIN_PATH);
+
+        return (procId != -1);
+    }
+
+    public boolean isOrbotInstalled()
+    {
+        return isAppInstalled(ORBOT_PACKAGE_NAME);
+    }
+
+    private boolean isAppInstalled(String uri) {
+        PackageManager pm = mContext.getPackageManager();
+        boolean installed = false;
+        try {
+            pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
+            installed = true;
+        } catch (PackageManager.NameNotFoundException e) {
+            installed = false;
+        }
+        return installed;
+    }
+
+    public void promptToInstall(Activity activity)
+    {
+        String uriMarket = activity.getString(R.string.market_orbot);
+        // show dialog - install from market, f-droid or direct APK
+        showDownloadDialog(activity, activity.getString(R.string.install_orbot_),
+                activity.getString(R.string.you_must_have_orbot),
+                activity.getString(R.string.orbot_yes), activity.getString(R.string.orbot_no), uriMarket);
+    }
+
+    private static AlertDialog showDownloadDialog(final Activity activity,
+            CharSequence stringTitle, CharSequence stringMessage, CharSequence stringButtonYes,
+            CharSequence stringButtonNo, final String uriString) {
+        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
+        downloadDialog.setTitle(stringTitle);
+        downloadDialog.setMessage(stringMessage);
+        downloadDialog.setPositiveButton(stringButtonYes, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                Uri uri = Uri.parse(uriString);
+                Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+                activity.startActivity(intent);
+            }
+        });
+        downloadDialog.setNegativeButton(stringButtonNo, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+            }
+        });
+        return downloadDialog.show();
+    }
+
+    public void requestOrbotStart(final Activity activity)
+    {
+
+        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
+        downloadDialog.setTitle(R.string.start_orbot_);
+        downloadDialog
+                .setMessage(R.string.orbot_doesn_t_appear_to_be_running_would_you_like_to_start_it_up_and_connect_to_tor_);
+        downloadDialog.setPositiveButton(R.string.orbot_yes, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+                activity.startActivityForResult(getOrbotStartIntent(), 1);
+            }
+        });
+        downloadDialog.setNegativeButton(R.string.orbot_no, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialogInterface, int i) {
+            }
+        });
+        downloadDialog.show();
+
+    }
+
+    public void requestHiddenServiceOnPort(Activity activity, int port)
+    {
+        Intent intent = new Intent(ACTION_REQUEST_HS);
+        intent.setPackage(ORBOT_PACKAGE_NAME);
+        intent.putExtra("hs_port", port);
+
+        activity.startActivityForResult(intent, HS_REQUEST_CODE);
+    }
+
+    public static Intent getOrbotStartIntent() {
+        Intent intent = new Intent(ACTION_START_TOR);
+        intent.setPackage(ORBOT_PACKAGE_NAME);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        return intent;
+    }
+}

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/TorServiceUtils.java

@@ -0,0 +1,234 @@
+/* Copyright (c) 2009, Nathan Freitas, Orbot / The Guardian Project - http://openideals.com/guardian */
+/* See LICENSE for licensing information */
+
+package org.sufficientlysecure.keychain.util.orbot;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.net.URLEncoder;
+import java.util.StringTokenizer;
+
+import android.util.Log;
+
+public class TorServiceUtils {
+
+    private final static String TAG = "TorUtils";
+    // various console cmds
+    public final static String SHELL_CMD_CHMOD = "chmod";
+    public final static String SHELL_CMD_KILL = "kill -9";
+    public final static String SHELL_CMD_RM = "rm";
+    public final static String SHELL_CMD_PS = "ps";
+    public final static String SHELL_CMD_PIDOF = "pidof";
+
+    public final static String CHMOD_EXE_VALUE = "700";
+
+    public static boolean isRootPossible()
+    {
+
+        StringBuilder log = new StringBuilder();
+
+        try {
+
+            // Check if Superuser.apk exists
+            File fileSU = new File("/system/app/Superuser.apk");
+            if (fileSU.exists())
+                return true;
+
+            fileSU = new File("/system/app/superuser.apk");
+            if (fileSU.exists())
+                return true;
+
+            fileSU = new File("/system/bin/su");
+            if (fileSU.exists())
+            {
+                String[] cmd = {
+                    "su"
+                };
+                int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true);
+                if (exitCode != 0)
+                    return false;
+                else
+                    return true;
+            }
+
+            // Check for 'su' binary
+            String[] cmd = {
+                "which su"
+            };
+            int exitCode = TorServiceUtils.doShellCommand(cmd, log, false, true);
+
+            if (exitCode == 0) {
+                Log.d(TAG, "root exists, but not sure about permissions");
+                return true;
+
+            }
+
+        } catch (IOException e) {
+            // this means that there is no root to be had (normally) so we won't
+            // log anything
+            Log.e(TAG, "Error checking for root access", e);
+
+        } catch (Exception e) {
+            Log.e(TAG, "Error checking for root access", e);
+            // this means that there is no root to be had (normally)
+        }
+
+        Log.e(TAG, "Could not acquire root permissions");
+
+        return false;
+    }
+
+    public static int findProcessId(String command)
+    {
+        int procId = -1;
+
+        try
+        {
+            procId = findProcessIdWithPidOf(command);
+
+            if (procId == -1)
+                procId = findProcessIdWithPS(command);
+        } catch (Exception e)
+        {
+            try
+            {
+                procId = findProcessIdWithPS(command);
+            } catch (Exception e2)
+            {
+                Log.e(TAG, "Unable to get proc id for command: " + URLEncoder.encode(command), e2);
+            }
+        }
+
+        return procId;
+    }
+
+    // use 'pidof' command
+    public static int findProcessIdWithPidOf(String command) throws Exception
+    {
+
+        int procId = -1;
+
+        Runtime r = Runtime.getRuntime();
+
+        Process procPs = null;
+
+        String baseName = new File(command).getName();
+        // fix contributed my mikos on 2010.12.10
+        procPs = r.exec(new String[] {
+                SHELL_CMD_PIDOF, baseName
+        });
+        // procPs = r.exec(SHELL_CMD_PIDOF);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
+        String line = null;
+
+        while ((line = reader.readLine()) != null)
+        {
+
+            try
+            {
+                // this line should just be the process id
+                procId = Integer.parseInt(line.trim());
+                break;
+            } catch (NumberFormatException e)
+            {
+                Log.e("TorServiceUtils", "unable to parse process pid: " + line, e);
+            }
+        }
+
+        return procId;
+
+    }
+
+    // use 'ps' command
+    public static int findProcessIdWithPS(String command) throws Exception
+    {
+
+        int procId = -1;
+
+        Runtime r = Runtime.getRuntime();
+
+        Process procPs = null;
+
+        procPs = r.exec(SHELL_CMD_PS);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
+        String line = null;
+
+        while ((line = reader.readLine()) != null)
+        {
+            if (line.indexOf(' ' + command) != -1)
+            {
+
+                StringTokenizer st = new StringTokenizer(line, " ");
+                st.nextToken(); // proc owner
+
+                procId = Integer.parseInt(st.nextToken().trim());
+
+                break;
+            }
+        }
+
+        return procId;
+
+    }
+
+    public static int doShellCommand(String[] cmds, StringBuilder log, boolean runAsRoot,
+            boolean waitFor) throws Exception
+    {
+
+        Process proc = null;
+        int exitCode = -1;
+
+        if (runAsRoot)
+            proc = Runtime.getRuntime().exec("su");
+        else
+            proc = Runtime.getRuntime().exec("sh");
+
+        OutputStreamWriter out = new OutputStreamWriter(proc.getOutputStream());
+
+        for (int i = 0; i < cmds.length; i++)
+        {
+            // TorService.logMessage("executing shell cmd: " + cmds[i] +
+            // "; runAsRoot=" + runAsRoot + ";waitFor=" + waitFor);
+
+            out.write(cmds[i]);
+            out.write("\n");
+        }
+
+        out.flush();
+        out.write("exit\n");
+        out.flush();
+
+        if (waitFor)
+        {
+
+            final char buf[] = new char[10];
+
+            // Consume the "stdout"
+            InputStreamReader reader = new InputStreamReader(proc.getInputStream());
+            int read = 0;
+            while ((read = reader.read(buf)) != -1) {
+                if (log != null)
+                    log.append(buf, 0, read);
+            }
+
+            // Consume the "stderr"
+            reader = new InputStreamReader(proc.getErrorStream());
+            read = 0;
+            while ((read = reader.read(buf)) != -1) {
+                if (log != null)
+                    log.append(buf, 0, read);
+            }
+
+            exitCode = proc.waitFor();
+
+        }
+
+        return exitCode;
+
+    }
+}

OpenKeychain/src/main/res/values/strings.xml

@@ -49,6 +49,7 @@
     <string name="section_keys">"Subkeys"</string>
     <string name="section_cloud_search">"Cloud search"</string>
     <string name="section_passphrase_cache">"Password Cache"</string>
+    <string name="section_proxy_settings">"Proxy Settings"</string>
     <string name="section_certify">"Confirm"</string>
     <string name="section_actions">"Actions"</string>
     <string name="section_share_key">"Key"</string>
@@ -165,6 +166,16 @@
     <string name="pref_keybase">"keybase.io"</string>
     <string name="pref_keybase_summary">"Search keys on keybase.io"</string>
 
+    <!-- Proxy Preferences -->
+    <string name="pref_proxy_non">"Don't use a proxy"</string>
+    <string name="pref_proxy_tor">"Enable Tor"</string>
+    <string name="pref_proxy_tor_summary">"Requires Orbot to be installed"</string>
+    <string name="pref_proxy_normal">"Enable other proxy"</string>
+    <string name="pref_proxy_host">"Proxy Host"</string>
+    <string name="pref_proxy_host_err_invalid">"Proxy host cannot be empty"</string>
+    <string name="pref_proxy_port">"Proxy Port"</string>
+    <string name="pref_proxy_port_err_invalid">"Invalid port number entered"</string>
+
     <string name="user_id_no_name">"&lt;no name&gt;"</string>
     <string name="none">"&lt;none&gt;"</string>
 
@@ -180,6 +191,15 @@
 
     <string name="secret_key">"Secret Key:"</string>
 
+    <!-- OrbotHelper strings -->
+    <string name="install_orbot_">"Install Orbot?"</string>
+    <string name="market_orbot">"market://search?q=pname:org.torproject.android"</string>
+    <string name="you_must_have_orbot">"You must have Orbot installed and activated to proxy traffic through it. Would you like to install it from Google Play?"</string>
+    <string name="orbot_yes">"Yes"</string>
+    <string name="orbot_no">"No"</string>
+    <string name="start_orbot_">"Start Orbot?"</string>
+    <string name="orbot_doesn_t_appear_to_be_running_would_you_like_to_start_it_up_and_connect_to_tor_">"Orbot doesn\'t appear to be running. Would you like to start it up and connect to Tor?"</string>
+
     <!-- choice -->
     <string name="choice_none">"None"</string>
     <string name="choice_15secs">"15 secs"</string>

OpenKeychain/src/main/res/xml/preference_headers.xml

@@ -5,4 +5,7 @@
     <header
         android:fragment="org.sufficientlysecure.keychain.ui.SettingsActivity$AdvancedPrefsFragment"
         android:title="@string/section_passphrase_cache" />
+    <header
+        android:fragment="org.sufficientlysecure.keychain.ui.SettingsActivity$ProxyPrefsFragment"
+        android:title="@string/section_proxy_settings" />
 </preference-headers>

OpenKeychain/src/main/res/xml/proxy_prefs.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <CheckBoxPreference
+            android:key="useTorProxy"
+            android:persistent="true"
+            android:title="@string/pref_proxy_tor"
+            android:summary="@string/pref_proxy_tor_summary" />
+    <CheckBoxPreference
+            android:key="useNormalProxy"
+            android:persistent="true"
+            android:title="@string/pref_proxy_normal" />
+    <EditTextPreference
+        android:key="proxyHost"
+        android:persistent="true"
+        android:defaultValue="127.0.0.1"
+        android:title="@string/pref_proxy_host"
+        android:cursorVisible="true"
+        android:textCursorDrawable="@null"
+        android:inputType="textEmailAddress"/>
+    <EditTextPreference
+            android:key="proxyPort"
+            android:defaultValue="8118"
+            android:persistent="true"
+            android:title="@string/pref_proxy_port"
+            android:textCursorDrawable="@null"
+            android:inputType="number" />
+</PreferenceScreen>