Added restriction for time zone

Closes #1524

CHANGELOG.md

@@ -41,6 +41,7 @@ Changelog
 
 Other changes:
 
+* Added restriction for time zone ([issue](/../../issues/1524))
 * Updated Dutch translation
 * Updated Slovenian translation
 

res/values/functions.xml

@@ -239,6 +239,7 @@
     <string name="system_android_intent_action_EXTERNAL_APPLICATIONS_AVAILABLE" translatable="false"><![CDATA[<a href="http://developer.android.com/reference/android/content/Intent.html#ACTION_EXTERNAL_APPLICATIONS_AVAILABLE">Google documentation</a>]]></string>
     <string name="system_android_intent_action_EXTERNAL_APPLICATIONS_UNAVAILABLE" translatable="false"><![CDATA[<a href="http://developer.android.com/reference/android/content/Intent.html#ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE">Google documentation</a>]]></string>
     <string name="system_ApplicationsProvider" translatable="false"><![CDATA[Will restrict access to a list of applications installed on the phone to provide search suggestions]]></string>
+    <string name="system_TZ_getDefault" translatable="false"><![CDATA[<a href="http://developer.android.com/reference/java/util/TimeZone.html#getDefault()">Google documentation</a>]]></string>
     <!-- view -->
     <string name="view_loadUrl" translatable="false"><![CDATA[<a href="http://developer.android.com/reference/android/webkit/WebView.html#loadUrl(java.lang.String)">Google documentation</a>]]></string>
     <string name="view_WebView" translatable="false"><![CDATA[<a href="http://developer.android.com/reference/android/webkit/WebView.html">Google documentation</a>]]></string>

src/biz/bokhorst/xprivacy/ActivityMain.java

@@ -4,6 +4,7 @@
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.TimeZone;
 import java.util.TreeMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;

src/biz/bokhorst/xprivacy/Meta.java

@@ -272,6 +272,8 @@ public static List<Hook> get() {
 		mListHook.add(new Hook("system", "android.intent.action.EXTERNAL_APPLICATIONS_UNAVAILABLE", "", 8, null, null).dangerous());
 		mListHook.add(new Hook("system", "ApplicationsProvider", "", 1, null, null));
 
+		mListHook.add(new Hook("system", "TZ.getDefault", "", 1, null, null).dangerous());
+
 		mListHook.add(new Hook("view", "loadUrl", "", 1, null, null).whitelist(cTypeUrl));
 		mListHook.add(new Hook("view", "WebView", "", 1, null, null));
 		mListHook.add(new Hook("view", "getDefaultUserAgent", "", 17, null, null));

src/biz/bokhorst/xprivacy/XPrivacy.java

@@ -143,6 +143,9 @@ protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
 		// System properties
 		hookAll(XSystemProperties.getInstances(), mSecret);
 
+		// Time zone
+		hookAll(XTimeZone.getInstances(), mSecret);
+
 		// Web view
 		hookAll(XWebView.getInstances(), mSecret);
 

src/biz/bokhorst/xprivacy/XTimeZone.java

@@ -0,0 +1,48 @@
+package biz.bokhorst.xprivacy;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.SimpleTimeZone;
+
+import android.util.Log;
+
+public class XTimeZone extends XHook {
+	private Methods mMethod;
+
+	private XTimeZone(Methods method, String restrictionName) {
+		super(restrictionName, method.name(), "TZ." + method.name());
+		mMethod = method;
+	}
+
+	public String getClassName() {
+		return "java.util.TimeZone";
+	}
+
+	// public static synchronized TimeZone getDefault()
+	// http://developer.android.com/reference/android/app/ActivityManager.html
+
+	private enum Methods {
+		getDefault
+	};
+
+	public static List<XHook> getInstances() {
+		List<XHook> listHook = new ArrayList<XHook>();
+		listHook.add(new XTimeZone(Methods.getDefault, PrivacyManager.cSystem));
+		return listHook;
+	}
+
+	@Override
+	protected void before(XParam param) throws Throwable {
+		// Do nothing
+	}
+
+	@Override
+	protected void after(XParam param) throws Throwable {
+		if (mMethod == Methods.getDefault) {
+			if (param.getResult() != null && isRestricted(param))
+				param.setResult(new SimpleTimeZone(0, "UTC"));
+
+		} else
+			Util.log(this, Log.WARN, "Unknown method=" + param.method.getName());
+	}
+}