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/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package com.android.browser.mdm;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;
import com.android.browser.Browser;
import com.android.browser.PreferenceKeys;
public class ProxyRestriction extends Restriction implements PreferenceKeys {
private final static String TAG = "ProxyRestriction";
// These strings are duplicated in chromium.net.ProxyChangeListener.java
// (duplication due to layer policy)
// If you need to change/add/delete, make sure they stay in sync
public static final String MDM_PROXY_CHANGE_ACTION = "swe.mdm.intent.action.PROXY_CHANGE";
public static final String PROXY_MODE = "ProxyMode";
public static final String MODE_DIRECT = "direct";
public static final String MODE_SYSTEM = "system";
public static final String MODE_AUTO_DETECT = "auto_detect";
public static final String MODE_FIXED_SERVERS = "fixed_servers";
public static final String MODE_PAC_SCRIPT = "pac_script";
public static final String PROXY_SERVER = "ProxyServer";
public static final String PROXY_PORT = "ProxyPort";
public static final String PROXY_PAC_URL = "ProxyPacUrl";
public static final String PROXY_BYPASS_LIST = "ProxyBypassList";
private static ProxyRestriction sInstance;
private ProxyRestriction() {
super(TAG);
}
public static ProxyRestriction getInstance() {
synchronized (ProxyRestriction.class) {
if (sInstance == null) {
sInstance = new ProxyRestriction();
}
}
return sInstance;
}
@Override
public void enforce(Bundle restrictions) {
String proxyMode = restrictions.getString(PROXY_MODE);
// Leaving ProxyMode not set lifts any managed profile proxy restrictions, allowing users to
// choose the proxy settings on their own.
if (proxyMode == null) {
Log.v(TAG, "enforce: proxyMode is null, disabling.");
saveProxyConfig(false, null, null, -1, null, null);
}
// If policy is to not use the proxy and always connect directly, then all other options
// are ignored.
else if (proxyMode.equals(MODE_DIRECT)) {
Log.v(TAG, "enforce: proxyMode is MODE_DIRECT, enabling and passing to ProxyChangeListener.");
saveProxyConfig(true, proxyMode, null, -1, null, null);
}
// If you choose to use system proxy settings or auto detect the proxy server,
// all other options are ignored.
else if (proxyMode.equals(MODE_SYSTEM) ||
proxyMode.equals(MODE_AUTO_DETECT)) {
saveProxyConfig(true, proxyMode, null, -1, null, null);
}
// If you choose fixed server proxy mode, you can specify further options in 'Address or URL
// of proxy server' and 'Comma-separated list of proxy bypass rules'.
else if (proxyMode.equals(MODE_FIXED_SERVERS)) {
String host;
int port;
try {
Uri proxyServerUri = Uri.parse(restrictions.getString(PROXY_SERVER));
host = proxyServerUri.getHost();
// Bail out if host is not present
if (host == null) {
Log.e(TAG, "enforce: host == null while processing MODE_FIXED_SERVERS");
saveProxyConfig(false, null, null, -1, null, null);
return;
}
port = proxyServerUri.getPort();
} catch (Exception e) {
// Bail out if ProxyServer string is missing
Log.e(TAG,"enforce: Exception caught while processing MODE_FIXED_SERVERS");
saveProxyConfig(false, null, null, -1, null, null);
return;
}
String proxyBypassList = restrictions.getString(PROXY_BYPASS_LIST);
Log.v(TAG,"enforce: saving MODE_FIXED_SERVERS proxy config: ");
Log.v(TAG," - host : " + host);
Log.v(TAG," - port : " + port);
Log.v(TAG," - bypassList : " + (proxyBypassList != null ? proxyBypassList : "NULL"));
saveProxyConfig(true, proxyMode, host, port, null, proxyBypassList);
}
// This policy only takes effect if you have selected manual proxy settings at 'Choose how
// to specify proxy server settings'. You should leave this policy not set if you have
// selected any other mode for setting proxy policies.
else if (proxyMode.equals(MODE_PAC_SCRIPT)) {
String proxyPacUrl = restrictions.getString(PROXY_PAC_URL);
// Bail out if ProxyPacUrl string is missing
if (proxyPacUrl == null) {
Log.v(TAG, "enforce: MODE_PAC_SCRIPT. proxyPacUrl is null. disabling");
saveProxyConfig(false, null, null, -1, null, null);
} else {
Log.v(TAG, "enforce: MODE_PAC_SCRIPT. proxyPacUrl ["+ proxyPacUrl +
"]. sending and enabling");
saveProxyConfig(true, proxyMode, null, -1, proxyPacUrl, null);
}
}
}
private void saveProxyConfig(boolean isEnabled, String proxyMode, String host,
int port, String proxyPacUrl, String proxyBypassList) {
enable(isEnabled);
Intent proxySignal = new Intent(MDM_PROXY_CHANGE_ACTION);
proxySignal.putExtra(PROXY_MODE, isEnabled ? proxyMode : null);
if (isEnabled) {
proxySignal.putExtra(PROXY_SERVER, host);
proxySignal.putExtra(PROXY_PORT, port);
proxySignal.putExtra(PROXY_PAC_URL, proxyPacUrl);
proxySignal.putExtra(PROXY_BYPASS_LIST, proxyBypassList);
}
// Send the broadcast. We use LocalBroadcastManager because it is more secure
// and it provides a handy synchronous call.
LocalBroadcastManager.getInstance(Browser.getContext()).sendBroadcastSync(proxySignal);
}
}
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