First version of the newly restructured repository

frontend/beta/js/Clipperz/PM/Toll.js

@@ -0,0 +1,193 @@
+/*
+
+Copyright 2008-2011 Clipperz Srl
+
+This file is part of Clipperz's Javascript Crypto Library.
+Javascript Crypto Library provides web developers with an extensive
+and efficient set of cryptographic functions. The library aims to
+obtain maximum execution speed while preserving modularity and
+reusability.
+For further information about its features and functionalities please
+refer to http://www.clipperz.com
+
+* Javascript Crypto Library 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.
+
+* Javascript Crypto Library 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 Javascript Crypto Library.  If not, see
+  <http://www.gnu.org/licenses/>.
+
+*/
+
+if (typeof(Clipperz) == 'undefined') { Clipperz = {}; }
+if (typeof(Clipperz.PM) == 'undefined') { Clipperz.PM = {}; }
+
+//=============================================================================
+
+Clipperz.PM.Toll = function(args) {
+	this._requestType = args.requestType;
+	this._targetValue = args.targetValue;
+	this._cost = args.cost;
+	this._toll = null;
+
+	return this;
+}
+
+Clipperz.PM.Toll.prototype = MochiKit.Base.update(null, {
+
+	'toString': function() {
+		return "Clipperz.PM.Toll (" + this.requestType() + ": " + this.cost() + " - " + ((this.toll() == null)? 'UNPAID' : 'PAID') + ")";
+	},
+
+	//-------------------------------------------------------------------------
+
+	'requestType': function() {
+		return this._requestType;
+	},
+
+	//-------------------------------------------------------------------------
+
+	'targetValue': function() {
+		return this._targetValue;
+	},
+
+	//-------------------------------------------------------------------------
+
+	'cost': function() {
+		return this._cost;
+	},
+	
+	//-------------------------------------------------------------------------
+
+	'toll': function() {
+		return this._toll;
+	},
+
+	//=========================================================================
+	
+	'prefixMatchingBits': function(aValue1, aValue2) {
+		var	result;
+		var i,c;
+		
+		result = 0;
+
+		c = Math.min(aValue1.length(), aValue2.length());
+		i = 0;
+		while (i<c && (aValue1.byteAtIndex(i) == aValue2.byteAtIndex(i))) {
+			result += 8;
+			i++;
+		}
+
+		if (i<c) {
+			var	xorValue;
+			
+			xorValue = (aValue1.byteAtIndex(i) ^ aValue2.byteAtIndex(i));
+			
+			if (xorValue >= 128) {
+				result += 0;
+			} else if (xorValue >= 64) {
+				result += 1;
+			} else if (xorValue >= 32) {
+				result += 2;
+			} else if (xorValue >= 16) {
+				result += 3;
+			} else if (xorValue >= 8) {
+				result += 4;
+			} else if (xorValue >= 4) {
+				result += 5;
+			} else if (xorValue >= 2) {
+				result += 6;
+			} else if (xorValue >= 1) {
+				result += 7;
+			}
+		}
+
+		return result;
+	},
+
+	//=========================================================================
+
+	'pay': function() {
+		var	result;
+		var	targetData;
+		var	targetMatchSize;
+		var prefixMatchingBits;
+		var	payment;
+		var i;
+		
+//MochiKit.Logging.logDebug(">>> Toll.pay");
+		if (this.toll() == null) {
+			i = 0;
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 1");
+			targetData = new Clipperz.ByteArray("0x" + this.targetValue());
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 2");
+			targetMatchSize = this.cost();
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 3");
+		
+			payment = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32);
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 4");
+		
+			do {
+				var	paymentData;
+
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 5");
+				//payment = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32);
+				payment.increment();
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 6");
+				paymentData = Clipperz.Crypto.SHA.sha256(payment);
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 7");
+				prefixMatchingBits = this.prefixMatchingBits(targetData, paymentData);
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 8");
+				i++;
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 9");
+			} while (prefixMatchingBits < targetMatchSize);
+//MochiKit.Logging.logDebug("--- Proxy.payToll - 10");
+
+			this._toll = payment.toHexString().substring(2)
+		}
+//MochiKit.Logging.logDebug("<<< Toll.pay");
+
+		return this;
+	},
+	
+	//-------------------------------------------------------------------------
+
+	'deferredPay': function() {
+		var	deferredResult;
+		var	toll;
+		
+//MochiKit.Logging.logDebug(">>> Toll.deferredPay");
+		toll = this;
+		deferredResult = new MochiKit.Async.Deferred();
+//deferredResult.addBoth(function(res) {MochiKit.Logging.logDebug("y.1 - Proxy.deferredPayToll - 1: " + res); return res;});
+		deferredResult.addCallback(MochiKit.Base.method(toll, 'pay'));
+//deferredResult.addBoth(function(res) {MochiKit.Logging.logDebug("y.2 - Proxy.deferredPayToll - 2: " + res); return res;});
+		deferredResult.addCallback(function(aToll) {
+			var result;
+		
+			result = {
+				targetValue:aToll.targetValue(),
+				toll:aToll.toll()
+			};
+		
+			return result;
+		});
+//deferredResult.addBoth(function(res) {MochiKit.Logging.logDebug("y.3 - Proxy.deferredPayToll - 3: " + res); return res;});
+		deferredResult.callback();
+//MochiKit.Logging.logDebug("<<< Toll.deferredPay");
+		
+		return deferredResult;
+	},
+	
+	//=========================================================================
+	__syntaxFix__: "syntax fix"
+	
+});
+