Mitigation for vulnerability CLP-01-018

3 files changed, 135 insertions, 251 deletions

diff --git a/frontend/beta/js/Clipperz/Crypto/PRNG.js b/frontend/beta/js/Clipperz/Crypto/PRNG.js
index b5c3f8a..92966d0 100644
--- a/frontend/beta/js/Clipperz/Crypto/PRNG.js
+++ b/frontend/beta/js/Clipperz/Crypto/PRNG.js
@@ -176,230 +176,182 @@ Clipperz.Crypto.PRNG.TimeRandomnessSource.prototype = MochiKit.Base.update(new C
 
 	'collectEntropy': function() {
 		var	now;
 		var	entropyByte;
 		var intervalTime;
 		now = new Date();
 		entropyByte = (now.getTime() & 0xff);
 		
 		intervalTime = this.intervalTime();
 		if (this.boostMode() == true) {
 			intervalTime = intervalTime / 9;
 		}
 		
 		this.updateGeneratorWithValue(entropyByte);
 		setTimeout(this.collectEntropy, intervalTime);
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 5;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource = function(args) {
 	args = args || {};
 
 	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
 	this._numberOfBitsToCollectAtEachEvent = 4;
 	this._randomBitsCollector = 0;
 	this._numberOfRandomBitsCollected = 0;
 	
 	MochiKit.Signal.connect(document, 'onmousemove', this, 'collectEntropy');
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
 	//-------------------------------------------------------------------------
 
 	'numberOfBitsToCollectAtEachEvent': function() {
 		return this._numberOfBitsToCollectAtEachEvent;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'randomBitsCollector': function() {
 		return this._randomBitsCollector;
 	},
 
 	'setRandomBitsCollector': function(aValue) {
 		this._randomBitsCollector = aValue;
 	},
 
 	'appendRandomBitsToRandomBitsCollector': function(aValue) {
 		var collectedBits;
 		var numberOfRandomBitsCollected;
 		
 		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
+		collectedBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
+		this.setRandomBitsCollector(collectedBits);
 		numberOfRandomBitsCollected += this.numberOfBitsToCollectAtEachEvent();
 		
 		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
+			this.updateGeneratorWithValue(collectedBits);
 			numberOfRandomBitsCollected = 0;
 			this.setRandomBitsCollector(0);
 		}
 		
 		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBitsCollected': function() {
 		return this._numberOfRandomBitsCollected;
 	},
 
 	'setNumberOfRandomBitsCollected': function(aValue) {
 		this._numberOfRandomBitsCollected = aValue;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'collectEntropy': function(anEvent) {
 		var mouseLocation;
 		var randomBit;
 		var mask;
 		
 		mask = 0xffffffff >>> (32 - this.numberOfBitsToCollectAtEachEvent());
 		
 		mouseLocation = anEvent.mouse().client;
 		randomBit = ((mouseLocation.x ^ mouseLocation.y) & mask);
 		this.appendRandomBitsToRandomBitsCollector(randomBit)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 1;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource = function(args) {
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource = function(args) {
 	args = args || {};
-	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
-	this._randomBitsCollector = 0;
-	this._numberOfRandomBitsCollected = 0;
+	this._intervalTime = args.intervalTime || 1000;
+	this._browserCrypto = args.browserCrypto;
 	
-	MochiKit.Signal.connect(document, 'onkeypress', this, 'collectEntropy');
+	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
+	this.collectEntropy();
 	return this;
 }
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
-
-	//-------------------------------------------------------------------------
-
-	'randomBitsCollector': function() {
-		return this._randomBitsCollector;
-	},
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
-	'setRandomBitsCollector': function(aValue) {
-		this._randomBitsCollector = aValue;
+	'intervalTime': function() {
+		return this._intervalTime;
 	},
-
-	'appendRandomBitToRandomBitsCollector': function(aValue) {
-		var collectedBits;
-		var numberOfRandomBitsCollected;
-		
-		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
-		numberOfRandomBitsCollected ++;
-		
-		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
-			numberOfRandomBitsCollected = 0;
-			this.setRandomBitsCollector(0);
-		}
-		
-		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
+	
+	'browserCrypto': function () {
+		return this._browserCrypto;
 	},
 	
 	//-------------------------------------------------------------------------
 
-	'numberOfRandomBitsCollected': function() {
-		return this._numberOfRandomBitsCollected;
-	},
-
-	'setNumberOfRandomBitsCollected': function(aValue) {
-		this._numberOfRandomBitsCollected = aValue;
-	},
+	'collectEntropy': function() {
+		var	bytesToCollect;
 
-	//-------------------------------------------------------------------------
+		if (this.boostMode() == true) {
+			bytesToCollect = 8;
+		} else {
+			bytesToCollect = 32;
+		}
 
-	'collectEntropy': function(anEvent) {
-/*
-		var mouseLocation;
-		var randomBit;
-		
-		mouseLocation = anEvent.mouse().client;
-			
-		randomBit = ((mouseLocation.x ^ mouseLocation.y) & 0x1);
-		this.appendRandomBitToRandomBitsCollector(randomBit);
-*/
-	},
-	
-	//-------------------------------------------------------------------------
+		var randomValuesArray = new Uint8Array(bytesToCollect);
+		this.browserCrypto().getRandomValues(randomValuesArray);
+		for (var i = 0; i < randomValuesArray.length; i++) {
+			this.updateGeneratorWithValue(randomValuesArray[i]);
+		}
 
-	'numberOfRandomBits': function() {
-		return 1;
+		setTimeout(this.collectEntropy, this.intervalTime());
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Fortuna = function(args) {
 	var	i,c;
 	
 	args = args || {};
 
 	this._key = args.seed || null;
 	if (this._key == null) {
 		this._counter = 0;
 		this._key = new Clipperz.ByteArray();
 	} else {
 		this._counter = 1;
 	}
 	
 	this._aesKey = null;
 	
 	this._firstPoolReseedLevel = args.firstPoolReseedLevel || 32 || 64;
 	this._numberOfEntropyAccumulators = args.numberOfEntropyAccumulators || 32;
 	
 	this._accumulators = [];
@@ -586,85 +538,79 @@ MochiKit.Logging.logWarning("Fortuna generator has not enough entropy, yet!");
 		return this._numberOfEntropyAccumulators;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'randomnessSources': function() {
 		return this._randomnessSources;
 	},
 	
 	'addRandomnessSource': function(aRandomnessSource) {
 		aRandomnessSource.setGenerator(this);
 		aRandomnessSource.setSourceId(this.randomnessSources().length);
 		this.randomnessSources().push(aRandomnessSource);
 		
 		if (this.isReadyToGenerateRandomValues() == false) {
 			aRandomnessSource.setBoostMode(true);
 		}
 	},
 
 	//-------------------------------------------------------------------------
 
 	'deferredEntropyCollection': function(aValue) {
 		var result;
 
-//MochiKit.Logging.logDebug(">>> PRNG.deferredEntropyCollection");
 
 		if (this.isReadyToGenerateRandomValues()) {
-//MochiKit.Logging.logDebug("--- PRNG.deferredEntropyCollection - 1");
 			result = aValue;
 		} else {
-//MochiKit.Logging.logDebug("--- PRNG.deferredEntropyCollection - 2");
 			var deferredResult;
 
 			Clipperz.NotificationCenter.notify(this, 'updatedProgressState', 'collectingEntropy', true);
 
 			deferredResult = new MochiKit.Async.Deferred();
-//			deferredResult.addBoth(function(res) {MochiKit.Logging.logDebug("1.2.1 - PRNG.deferredEntropyCollection - 1: " + res); return res;});
 			deferredResult.addCallback(MochiKit.Base.partial(MochiKit.Async.succeed, aValue));
-//			deferredResult.addBoth(function(res) {MochiKit.Logging.logDebug("1.2.2 - PRNG.deferredEntropyCollection - 2: " + res); return res;});
 			MochiKit.Signal.connect(this,
 									'readyToGenerateRandomBytes',
 									deferredResult,
 									'callback');
 									
 			result = deferredResult;
 		}
-//MochiKit.Logging.logDebug("<<< PRNG.deferredEntropyCollection - result: " + result);
 
 		return result;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'fastEntropyAccumulationForTestingPurpose': function() {
 		while (! this.isReadyToGenerateRandomValues()) {
 			this.addRandomByte(Math.floor(Math.random() * 32), Math.floor(Math.random() * 32), Math.floor(Math.random() * 256));
 		}
 	},
 	
 	//-------------------------------------------------------------------------
-
+/*
 	'dump': function(appendToDoc) {
 		var tbl;
 		var i,c;
 		
 		tbl = document.createElement("table");
 		tbl.border = 0;
 		with (tbl.style) {
 			border = "1px solid lightgrey";
 			fontFamily = 'Helvetica, Arial, sans-serif';
 			fontSize = '8pt';
 			//borderCollapse = "collapse";
 		}
 		var hdr = tbl.createTHead();
 		var hdrtr = hdr.insertRow(0);
 		// document.createElement("tr");
 		{
 			var ntd;
 			
 			ntd = hdrtr.insertCell(0);
 			ntd.style.borderBottom = "1px solid lightgrey";
 			ntd.style.borderRight = "1px solid lightgrey";
 			ntd.appendChild(document.createTextNode("#"));
 
 			ntd = hdrtr.insertCell(1);
@@ -728,49 +674,49 @@ MochiKit.Logging.logWarning("Fortuna generator has not enough entropy, yet!");
 			
 		}
 		
 
 		if (appendToDoc) {
 			var ne = document.createElement("div");
 			ne.id = "entropyGeneratorStatus";
 			with (ne.style) {
 				fontFamily = "Courier New, monospace";
 				fontSize = "12px";
 				lineHeight = "16px";
 				borderTop = "1px solid black";
 				padding = "10px";
 			}
 			if (document.getElementById(ne.id)) {
 				MochiKit.DOM.swapDOM(ne.id, ne);
 			} else {
 				document.body.appendChild(ne);
 			}
 			ne.appendChild(tbl);
 		}
 
 		return tbl;
 	},
-
+*/
 	//-----------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Random = function(args) {
 	args = args || {};
 //	MochiKit.Base.bindMethods(this);
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.Random.prototype = MochiKit.Base.update(null, {
 
 	'toString': function() {
 		return "Clipperz.Crypto.PRNG.Random";
 	},
 
 	//-------------------------------------------------------------------------
 
 	'getRandomBytes': function(aSize) {
 //Clipperz.Profile.start("Clipperz.Crypto.PRNG.Random.getRandomBytes");
 		var	result;
@@ -803,47 +749,57 @@ Clipperz.Crypto.PRNG.defaultRandomGenerator = function() {
 		//		TimeRandomnessSource
 		//
 		//.............................................................
 		{
 			var newRandomnessSource;
 		
 			newRandomnessSource = new Clipperz.Crypto.PRNG.TimeRandomnessSource({intervalTime:111});
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
 		//		MouseRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
 			
 			newRandomnessSource = new Clipperz.Crypto.PRNG.MouseRandomnessSource();
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
-		//		KeyboardRandomnessSource
+		//		CryptoRandomRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
+			var	browserCrypto;
 			
-			newRandomnessSource = new Clipperz.Crypto.PRNG.KeyboardRandomnessSource();
-			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			if (window.crypto && window.crypto.getRandomValues) {
+				browserCrypto = window.crypto;
+			} else if (window.msCrypto && window.msCrypto.getRandomValues) {
+				browserCrypto = window.msCrypto;
+			} else {
+				browserCrypto = null;
+			}
+	
+			if (browserCrypto != null) {
+				newRandomnessSource = new Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource({'browserCrypto':browserCrypto});
+				_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			}
 		}
-
 	}
 
 	return _clipperz_crypt_prng_defaultPRNG;
 };
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.exception =  {
 	NotEnoughEntropy: new MochiKit.Base.NamedError("Clipperz.Crypto.PRNG.exception.NotEnoughEntropy") 
 };
 
 
 MochiKit.DOM.addLoadEvent(Clipperz.Crypto.PRNG.defaultRandomGenerator);
diff --git a/frontend/delta/js/Clipperz/Crypto/PRNG.js b/frontend/delta/js/Clipperz/Crypto/PRNG.js
index c539f06..7885429 100644
--- a/frontend/delta/js/Clipperz/Crypto/PRNG.js
+++ b/frontend/delta/js/Clipperz/Crypto/PRNG.js
@@ -1,47 +1,49 @@
 /*
 
 Copyright 2008-2013 Clipperz Srl
 
 This file is part of Clipperz, the online password manager.
 For further information about its features and functionalities please
 refer to http://www.clipperz.com.
 
 * Clipperz is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License, or 
   (at your option) any later version.
 
 * Clipperz is distributed in the hope that it will be useful, but 
   WITHOUT ANY WARRANTY; without even the implied warranty of 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   See the GNU Affero General Public License for more details.
 
 * You should have received a copy of the GNU Affero General Public
   License along with Clipperz. If not, see http://www.gnu.org/licenses/.
 
 */
 
+"use strict";
+
 try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
 }  
 
 try { if (typeof(Clipperz.Crypto.SHA) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.Crypto.SHA!";
 }  
 
 try { if (typeof(Clipperz.Crypto.AES) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.Crypto.AES!";
 }  
 
 if (typeof(Clipperz.Crypto.PRNG) == 'undefined') { Clipperz.Crypto.PRNG = {}; }
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.EntropyAccumulator = function(args) {
 	args = args || {};
 //	MochiKit.Base.bindMethods(this);
 
 	this._stack = new Clipperz.ByteArray();
 	this._maxStackLengthBeforeHashing = args.maxStackLengthBeforeHashing || 256;
 	return this;
 }
@@ -176,230 +178,182 @@ Clipperz.Crypto.PRNG.TimeRandomnessSource.prototype = MochiKit.Base.update(new C
 
 	'collectEntropy': function() {
 		var	now;
 		var	entropyByte;
 		var intervalTime;
 		now = new Date();
 		entropyByte = (now.getTime() & 0xff);
 		
 		intervalTime = this.intervalTime();
 		if (this.boostMode() == true) {
 			intervalTime = intervalTime / 9;
 		}
 		
 		this.updateGeneratorWithValue(entropyByte);
 		setTimeout(this.collectEntropy, intervalTime);
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 5;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource = function(args) {
 	args = args || {};
 
 	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
 	this._numberOfBitsToCollectAtEachEvent = 4;
 	this._randomBitsCollector = 0;
 	this._numberOfRandomBitsCollected = 0;
 	
 	MochiKit.Signal.connect(document, 'onmousemove', this, 'collectEntropy');
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
 	//-------------------------------------------------------------------------
 
 	'numberOfBitsToCollectAtEachEvent': function() {
 		return this._numberOfBitsToCollectAtEachEvent;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'randomBitsCollector': function() {
 		return this._randomBitsCollector;
 	},
 
 	'setRandomBitsCollector': function(aValue) {
 		this._randomBitsCollector = aValue;
 	},
 
 	'appendRandomBitsToRandomBitsCollector': function(aValue) {
 		var collectedBits;
 		var numberOfRandomBitsCollected;
 		
 		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
+		collectedBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
+		this.setRandomBitsCollector(collectedBits);
 		numberOfRandomBitsCollected += this.numberOfBitsToCollectAtEachEvent();
 		
 		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
+			this.updateGeneratorWithValue(collectedBits);
 			numberOfRandomBitsCollected = 0;
 			this.setRandomBitsCollector(0);
 		}
 		
 		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBitsCollected': function() {
 		return this._numberOfRandomBitsCollected;
 	},
 
 	'setNumberOfRandomBitsCollected': function(aValue) {
 		this._numberOfRandomBitsCollected = aValue;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'collectEntropy': function(anEvent) {
 		var mouseLocation;
 		var randomBit;
 		var mask;
 		
 		mask = 0xffffffff >>> (32 - this.numberOfBitsToCollectAtEachEvent());
 		
 		mouseLocation = anEvent.mouse().client;
 		randomBit = ((mouseLocation.x ^ mouseLocation.y) & mask);
 		this.appendRandomBitsToRandomBitsCollector(randomBit)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 1;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource = function(args) {
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource = function(args) {
 	args = args || {};
-	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
-	this._randomBitsCollector = 0;
-	this._numberOfRandomBitsCollected = 0;
+	this._intervalTime = args.intervalTime || 1000;
+	this._browserCrypto = args.browserCrypto;
 	
-	MochiKit.Signal.connect(document, 'onkeypress', this, 'collectEntropy');
+	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
+	this.collectEntropy();
 	return this;
 }
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
-	//-------------------------------------------------------------------------
-
-	'randomBitsCollector': function() {
-		return this._randomBitsCollector;
-	},
-
-	'setRandomBitsCollector': function(aValue) {
-		this._randomBitsCollector = aValue;
+	'intervalTime': function() {
+		return this._intervalTime;
 	},
-
-	'appendRandomBitToRandomBitsCollector': function(aValue) {
-		var collectedBits;
-		var numberOfRandomBitsCollected;
-		
-		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
-		numberOfRandomBitsCollected ++;
-		
-		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
-			numberOfRandomBitsCollected = 0;
-			this.setRandomBitsCollector(0);
-		}
-		
-		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
+	
+	'browserCrypto': function () {
+		return this._browserCrypto;
 	},
 	
 	//-------------------------------------------------------------------------
 
-	'numberOfRandomBitsCollected': function() {
-		return this._numberOfRandomBitsCollected;
-	},
-
-	'setNumberOfRandomBitsCollected': function(aValue) {
-		this._numberOfRandomBitsCollected = aValue;
-	},
+	'collectEntropy': function() {
+		var	bytesToCollect;
 
-	//-------------------------------------------------------------------------
+		if (this.boostMode() == true) {
+			bytesToCollect = 8;
+		} else {
+			bytesToCollect = 32;
+		}
 
-	'collectEntropy': function(anEvent) {
-/*
-		var mouseLocation;
-		var randomBit;
-		
-		mouseLocation = anEvent.mouse().client;
-			
-		randomBit = ((mouseLocation.x ^ mouseLocation.y) & 0x1);
-		this.appendRandomBitToRandomBitsCollector(randomBit);
-*/
-	},
-	
-	//-------------------------------------------------------------------------
+		var randomValuesArray = new Uint8Array(bytesToCollect);
+		this.browserCrypto().getRandomValues(randomValuesArray);
+		for (var i = 0; i < randomValuesArray.length; i++) {
+			this.updateGeneratorWithValue(randomValuesArray[i]);
+		}
 
-	'numberOfRandomBits': function() {
-		return 1;
+		setTimeout(this.collectEntropy, this.intervalTime());
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Fortuna = function(args) {
 	var	i,c;
 	
 	args = args || {};
 
 	this._key = args.seed || null;
 	if (this._key == null) {
 		this._counter = 0;
 		this._key = new Clipperz.ByteArray();
 	} else {
 		this._counter = 1;
 	}
 	
 	this._aesKey = null;
 	
 	this._firstPoolReseedLevel = args.firstPoolReseedLevel || 32 || 64;
 	this._numberOfEntropyAccumulators = args.numberOfEntropyAccumulators || 32;
 	
 	this._accumulators = [];
@@ -614,49 +568,49 @@ Clipperz.logWarning("Fortuna generator has not enough entropy, yet!");
 			var deferredResult;
 
 			deferredResult = new Clipperz.Async.Deferred("PRNG.deferredEntropyCollection");
 			deferredResult.addCallback(MochiKit.Base.partial(MochiKit.Async.succeed, aValue));
 			MochiKit.Signal.connect(this,
 									'readyToGenerateRandomBytes',
 									deferredResult,
 									'callback');
 									
 			result = deferredResult;
 		}
 
 		return result;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'fastEntropyAccumulationForTestingPurpose': function() {
 		while (! this.isReadyToGenerateRandomValues()) {
 			this.addRandomByte(Math.floor(Math.random() * 32), Math.floor(Math.random() * 32), Math.floor(Math.random() * 256));
 		}
 	},
 	
 	//-------------------------------------------------------------------------
-
+/*
 	'dump': function(appendToDoc) {
 		var tbl;
 		var i,c;
 		
 		tbl = document.createElement("table");
 		tbl.border = 0;
 		with (tbl.style) {
 			border = "1px solid lightgrey";
 			fontFamily = 'Helvetica, Arial, sans-serif';
 			fontSize = '8pt';
 			//borderCollapse = "collapse";
 		}
 		var hdr = tbl.createTHead();
 		var hdrtr = hdr.insertRow(0);
 		// document.createElement("tr");
 		{
 			var ntd;
 			
 			ntd = hdrtr.insertCell(0);
 			ntd.style.borderBottom = "1px solid lightgrey";
 			ntd.style.borderRight = "1px solid lightgrey";
 			ntd.appendChild(document.createTextNode("#"));
 
 			ntd = hdrtr.insertCell(1);
@@ -720,122 +674,132 @@ Clipperz.logWarning("Fortuna generator has not enough entropy, yet!");
 			
 		}
 		
 
 		if (appendToDoc) {
 			var ne = document.createElement("div");
 			ne.id = "entropyGeneratorStatus";
 			with (ne.style) {
 				fontFamily = "Courier New, monospace";
 				fontSize = "12px";
 				lineHeight = "16px";
 				borderTop = "1px solid black";
 				padding = "10px";
 			}
 			if (document.getElementById(ne.id)) {
 				MochiKit.DOM.swapDOM(ne.id, ne);
 			} else {
 				document.body.appendChild(ne);
 			}
 			ne.appendChild(tbl);
 		}
 
 		return tbl;
 	},
-
+*/
 	//-----------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Random = function(args) {
 	args = args || {};
 //	MochiKit.Base.bindMethods(this);
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.Random.prototype = MochiKit.Base.update(null, {
 
 	'toString': function() {
 		return "Clipperz.Crypto.PRNG.Random";
 	},
 
 	//-------------------------------------------------------------------------
 
 	'getRandomBytes': function(aSize) {
 //Clipperz.Profile.start("Clipperz.Crypto.PRNG.Random.getRandomBytes");
 		var	result;
 		var i,c;
 		
 		result = new Clipperz.ByteArray()
 		c = aSize || 1;
 		for (i=0; i<c; i++) {
 			result.appendByte((Math.random()*255) & 0xff);
 		}
 		
 //Clipperz.Profile.stop("Clipperz.Crypto.PRNG.Random.getRandomBytes");
 		return result;
 	},
 
 	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
-_clipperz_crypt_prng_defaultPRNG = null;
+var _clipperz_crypt_prng_defaultPRNG = null;
 
 Clipperz.Crypto.PRNG.defaultRandomGenerator = function() {
 	if (_clipperz_crypt_prng_defaultPRNG == null) {
 		_clipperz_crypt_prng_defaultPRNG = new Clipperz.Crypto.PRNG.Fortuna();
 
 		//.............................................................
 		//
 		//		TimeRandomnessSource
 		//
 		//.............................................................
 		{
 			var newRandomnessSource;
 		
 			newRandomnessSource = new Clipperz.Crypto.PRNG.TimeRandomnessSource({intervalTime:111});
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
 		//		MouseRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
 			
 			newRandomnessSource = new Clipperz.Crypto.PRNG.MouseRandomnessSource();
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
-		//		KeyboardRandomnessSource
+		//		CryptoRandomRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
+			var	browserCrypto;
 			
-			newRandomnessSource = new Clipperz.Crypto.PRNG.KeyboardRandomnessSource();
-			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			if (window.crypto && window.crypto.getRandomValues) {
+				browserCrypto = window.crypto;
+			} else if (window.msCrypto && window.msCrypto.getRandomValues) {
+				browserCrypto = window.msCrypto;
+			} else {
+				browserCrypto = null;
+			}
+	
+			if (browserCrypto != null) {
+				newRandomnessSource = new Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource({'browserCrypto':browserCrypto});
+				_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			}
 		}
-
 	}
 
 	return _clipperz_crypt_prng_defaultPRNG;
 };
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.exception =  {
 	NotEnoughEntropy: new MochiKit.Base.NamedError("Clipperz.Crypto.PRNG.exception.NotEnoughEntropy") 
 };
 
 
 MochiKit.DOM.addLoadEvent(Clipperz.Crypto.PRNG.defaultRandomGenerator);
diff --git a/frontend/gamma/js/Clipperz/Crypto/PRNG.js b/frontend/gamma/js/Clipperz/Crypto/PRNG.js
index c539f06..7885429 100644
--- a/frontend/gamma/js/Clipperz/Crypto/PRNG.js
+++ b/frontend/gamma/js/Clipperz/Crypto/PRNG.js
@@ -1,47 +1,49 @@
 /*
 
 Copyright 2008-2013 Clipperz Srl
 
 This file is part of Clipperz, the online password manager.
 For further information about its features and functionalities please
 refer to http://www.clipperz.com.
 
 * Clipperz is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License, or 
   (at your option) any later version.
 
 * Clipperz is distributed in the hope that it will be useful, but 
   WITHOUT ANY WARRANTY; without even the implied warranty of 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   See the GNU Affero General Public License for more details.
 
 * You should have received a copy of the GNU Affero General Public
   License along with Clipperz. If not, see http://www.gnu.org/licenses/.
 
 */
 
+"use strict";
+
 try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
 }  
 
 try { if (typeof(Clipperz.Crypto.SHA) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.Crypto.SHA!";
 }  
 
 try { if (typeof(Clipperz.Crypto.AES) == 'undefined') { throw ""; }} catch (e) {
 	throw "Clipperz.Crypto.PRNG depends on Clipperz.Crypto.AES!";
 }  
 
 if (typeof(Clipperz.Crypto.PRNG) == 'undefined') { Clipperz.Crypto.PRNG = {}; }
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.EntropyAccumulator = function(args) {
 	args = args || {};
 //	MochiKit.Base.bindMethods(this);
 
 	this._stack = new Clipperz.ByteArray();
 	this._maxStackLengthBeforeHashing = args.maxStackLengthBeforeHashing || 256;
 	return this;
 }
@@ -176,230 +178,182 @@ Clipperz.Crypto.PRNG.TimeRandomnessSource.prototype = MochiKit.Base.update(new C
 
 	'collectEntropy': function() {
 		var	now;
 		var	entropyByte;
 		var intervalTime;
 		now = new Date();
 		entropyByte = (now.getTime() & 0xff);
 		
 		intervalTime = this.intervalTime();
 		if (this.boostMode() == true) {
 			intervalTime = intervalTime / 9;
 		}
 		
 		this.updateGeneratorWithValue(entropyByte);
 		setTimeout(this.collectEntropy, intervalTime);
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 5;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource = function(args) {
 	args = args || {};
 
 	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
 	this._numberOfBitsToCollectAtEachEvent = 4;
 	this._randomBitsCollector = 0;
 	this._numberOfRandomBitsCollected = 0;
 	
 	MochiKit.Signal.connect(document, 'onmousemove', this, 'collectEntropy');
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.MouseRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
 	//-------------------------------------------------------------------------
 
 	'numberOfBitsToCollectAtEachEvent': function() {
 		return this._numberOfBitsToCollectAtEachEvent;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'randomBitsCollector': function() {
 		return this._randomBitsCollector;
 	},
 
 	'setRandomBitsCollector': function(aValue) {
 		this._randomBitsCollector = aValue;
 	},
 
 	'appendRandomBitsToRandomBitsCollector': function(aValue) {
 		var collectedBits;
 		var numberOfRandomBitsCollected;
 		
 		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
+		collectedBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
+		this.setRandomBitsCollector(collectedBits);
 		numberOfRandomBitsCollected += this.numberOfBitsToCollectAtEachEvent();
 		
 		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
+			this.updateGeneratorWithValue(collectedBits);
 			numberOfRandomBitsCollected = 0;
 			this.setRandomBitsCollector(0);
 		}
 		
 		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBitsCollected': function() {
 		return this._numberOfRandomBitsCollected;
 	},
 
 	'setNumberOfRandomBitsCollected': function(aValue) {
 		this._numberOfRandomBitsCollected = aValue;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'collectEntropy': function(anEvent) {
 		var mouseLocation;
 		var randomBit;
 		var mask;
 		
 		mask = 0xffffffff >>> (32 - this.numberOfBitsToCollectAtEachEvent());
 		
 		mouseLocation = anEvent.mouse().client;
 		randomBit = ((mouseLocation.x ^ mouseLocation.y) & mask);
 		this.appendRandomBitsToRandomBitsCollector(randomBit)
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'numberOfRandomBits': function() {
 		return 1;
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //*****************************************************************************
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource = function(args) {
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource = function(args) {
 	args = args || {};
-	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
-	this._randomBitsCollector = 0;
-	this._numberOfRandomBitsCollected = 0;
+	this._intervalTime = args.intervalTime || 1000;
+	this._browserCrypto = args.browserCrypto;
 	
-	MochiKit.Signal.connect(document, 'onkeypress', this, 'collectEntropy');
+	Clipperz.Crypto.PRNG.RandomnessSource.call(this, args);
 
+	this.collectEntropy();
 	return this;
 }
 
-Clipperz.Crypto.PRNG.KeyboardRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
+Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource.prototype = MochiKit.Base.update(new Clipperz.Crypto.PRNG.RandomnessSource, {
 
-	//-------------------------------------------------------------------------
-
-	'randomBitsCollector': function() {
-		return this._randomBitsCollector;
-	},
-
-	'setRandomBitsCollector': function(aValue) {
-		this._randomBitsCollector = aValue;
+	'intervalTime': function() {
+		return this._intervalTime;
 	},
-
-	'appendRandomBitToRandomBitsCollector': function(aValue) {
-		var collectedBits;
-		var numberOfRandomBitsCollected;
-		
-		numberOfRandomBitsCollected = this.numberOfRandomBitsCollected();
-		collectetBits = this.randomBitsCollector() | (aValue << numberOfRandomBitsCollected);
-		this.setRandomBitsCollector(collectetBits);
-		numberOfRandomBitsCollected ++;
-		
-		if (numberOfRandomBitsCollected == 8) {
-			this.updateGeneratorWithValue(collectetBits);
-			numberOfRandomBitsCollected = 0;
-			this.setRandomBitsCollector(0);
-		}
-		
-		this.setNumberOfRandomBitsCollected(numberOfRandomBitsCollected)
+	
+	'browserCrypto': function () {
+		return this._browserCrypto;
 	},
 	
 	//-------------------------------------------------------------------------
 
-	'numberOfRandomBitsCollected': function() {
-		return this._numberOfRandomBitsCollected;
-	},
-
-	'setNumberOfRandomBitsCollected': function(aValue) {
-		this._numberOfRandomBitsCollected = aValue;
-	},
+	'collectEntropy': function() {
+		var	bytesToCollect;
 
-	//-------------------------------------------------------------------------
+		if (this.boostMode() == true) {
+			bytesToCollect = 8;
+		} else {
+			bytesToCollect = 32;
+		}
 
-	'collectEntropy': function(anEvent) {
-/*
-		var mouseLocation;
-		var randomBit;
-		
-		mouseLocation = anEvent.mouse().client;
-			
-		randomBit = ((mouseLocation.x ^ mouseLocation.y) & 0x1);
-		this.appendRandomBitToRandomBitsCollector(randomBit);
-*/
-	},
-	
-	//-------------------------------------------------------------------------
+		var randomValuesArray = new Uint8Array(bytesToCollect);
+		this.browserCrypto().getRandomValues(randomValuesArray);
+		for (var i = 0; i < randomValuesArray.length; i++) {
+			this.updateGeneratorWithValue(randomValuesArray[i]);
+		}
 
-	'numberOfRandomBits': function() {
-		return 1;
+		setTimeout(this.collectEntropy, this.intervalTime());
 	},
 	
 	//-------------------------------------------------------------------------
-
-	'pollingFrequency': function() {
-		return 10;
-	},
-
-	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Fortuna = function(args) {
 	var	i,c;
 	
 	args = args || {};
 
 	this._key = args.seed || null;
 	if (this._key == null) {
 		this._counter = 0;
 		this._key = new Clipperz.ByteArray();
 	} else {
 		this._counter = 1;
 	}
 	
 	this._aesKey = null;
 	
 	this._firstPoolReseedLevel = args.firstPoolReseedLevel || 32 || 64;
 	this._numberOfEntropyAccumulators = args.numberOfEntropyAccumulators || 32;
 	
 	this._accumulators = [];
@@ -614,49 +568,49 @@ Clipperz.logWarning("Fortuna generator has not enough entropy, yet!");
 			var deferredResult;
 
 			deferredResult = new Clipperz.Async.Deferred("PRNG.deferredEntropyCollection");
 			deferredResult.addCallback(MochiKit.Base.partial(MochiKit.Async.succeed, aValue));
 			MochiKit.Signal.connect(this,
 									'readyToGenerateRandomBytes',
 									deferredResult,
 									'callback');
 									
 			result = deferredResult;
 		}
 
 		return result;
 	},
 	
 	//-------------------------------------------------------------------------
 
 	'fastEntropyAccumulationForTestingPurpose': function() {
 		while (! this.isReadyToGenerateRandomValues()) {
 			this.addRandomByte(Math.floor(Math.random() * 32), Math.floor(Math.random() * 32), Math.floor(Math.random() * 256));
 		}
 	},
 	
 	//-------------------------------------------------------------------------
-
+/*
 	'dump': function(appendToDoc) {
 		var tbl;
 		var i,c;
 		
 		tbl = document.createElement("table");
 		tbl.border = 0;
 		with (tbl.style) {
 			border = "1px solid lightgrey";
 			fontFamily = 'Helvetica, Arial, sans-serif';
 			fontSize = '8pt';
 			//borderCollapse = "collapse";
 		}
 		var hdr = tbl.createTHead();
 		var hdrtr = hdr.insertRow(0);
 		// document.createElement("tr");
 		{
 			var ntd;
 			
 			ntd = hdrtr.insertCell(0);
 			ntd.style.borderBottom = "1px solid lightgrey";
 			ntd.style.borderRight = "1px solid lightgrey";
 			ntd.appendChild(document.createTextNode("#"));
 
 			ntd = hdrtr.insertCell(1);
@@ -720,122 +674,132 @@ Clipperz.logWarning("Fortuna generator has not enough entropy, yet!");
 			
 		}
 		
 
 		if (appendToDoc) {
 			var ne = document.createElement("div");
 			ne.id = "entropyGeneratorStatus";
 			with (ne.style) {
 				fontFamily = "Courier New, monospace";
 				fontSize = "12px";
 				lineHeight = "16px";
 				borderTop = "1px solid black";
 				padding = "10px";
 			}
 			if (document.getElementById(ne.id)) {
 				MochiKit.DOM.swapDOM(ne.id, ne);
 			} else {
 				document.body.appendChild(ne);
 			}
 			ne.appendChild(tbl);
 		}
 
 		return tbl;
 	},
-
+*/
 	//-----------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.Random = function(args) {
 	args = args || {};
 //	MochiKit.Base.bindMethods(this);
 
 	return this;
 }
 
 Clipperz.Crypto.PRNG.Random.prototype = MochiKit.Base.update(null, {
 
 	'toString': function() {
 		return "Clipperz.Crypto.PRNG.Random";
 	},
 
 	//-------------------------------------------------------------------------
 
 	'getRandomBytes': function(aSize) {
 //Clipperz.Profile.start("Clipperz.Crypto.PRNG.Random.getRandomBytes");
 		var	result;
 		var i,c;
 		
 		result = new Clipperz.ByteArray()
 		c = aSize || 1;
 		for (i=0; i<c; i++) {
 			result.appendByte((Math.random()*255) & 0xff);
 		}
 		
 //Clipperz.Profile.stop("Clipperz.Crypto.PRNG.Random.getRandomBytes");
 		return result;
 	},
 
 	//-------------------------------------------------------------------------
 	__syntaxFix__: "syntax fix"
 });
 
 //#############################################################################
 
-_clipperz_crypt_prng_defaultPRNG = null;
+var _clipperz_crypt_prng_defaultPRNG = null;
 
 Clipperz.Crypto.PRNG.defaultRandomGenerator = function() {
 	if (_clipperz_crypt_prng_defaultPRNG == null) {
 		_clipperz_crypt_prng_defaultPRNG = new Clipperz.Crypto.PRNG.Fortuna();
 
 		//.............................................................
 		//
 		//		TimeRandomnessSource
 		//
 		//.............................................................
 		{
 			var newRandomnessSource;
 		
 			newRandomnessSource = new Clipperz.Crypto.PRNG.TimeRandomnessSource({intervalTime:111});
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
 		//		MouseRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
 			
 			newRandomnessSource = new Clipperz.Crypto.PRNG.MouseRandomnessSource();
 			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
 		}
 
 		//.............................................................
 		//
-		//		KeyboardRandomnessSource
+		//		CryptoRandomRandomnessSource
 		//
 		//.............................................................
 		{
 			var	newRandomnessSource;
+			var	browserCrypto;
 			
-			newRandomnessSource = new Clipperz.Crypto.PRNG.KeyboardRandomnessSource();
-			_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			if (window.crypto && window.crypto.getRandomValues) {
+				browserCrypto = window.crypto;
+			} else if (window.msCrypto && window.msCrypto.getRandomValues) {
+				browserCrypto = window.msCrypto;
+			} else {
+				browserCrypto = null;
+			}
+	
+			if (browserCrypto != null) {
+				newRandomnessSource = new Clipperz.Crypto.PRNG.CryptoRandomRandomnessSource({'browserCrypto':browserCrypto});
+				_clipperz_crypt_prng_defaultPRNG.addRandomnessSource(newRandomnessSource);
+			}
 		}
-
 	}
 
 	return _clipperz_crypt_prng_defaultPRNG;
 };
 
 //#############################################################################
 
 Clipperz.Crypto.PRNG.exception =  {
 	NotEnoughEntropy: new MochiKit.Base.NamedError("Clipperz.Crypto.PRNG.exception.NotEnoughEntropy") 
 };
 
 
 MochiKit.DOM.addLoadEvent(Clipperz.Crypto.PRNG.defaultRandomGenerator);