1 files changed, 194 insertions, 0 deletions

diff --git a/frontend/gamma/js/Clipperz/PM/Toll.js b/frontend/gamma/js/Clipperz/PM/Toll.js
new file mode 100644
index 0000000..a533f51
--- a/dev/null
+++ b/frontend/gamma/js/Clipperz/PM/Toll.js
@@ -0,0 +1,194 @@
+/*
+
+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) {
+        args = 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;
+        },
+
+        //-------------------------------------------------------------------------
+/*
+        '__pay': function() {
+                        varresult;
+                        vartargetData;
+                        vartargetMatchSize;
+                var prefixMatchingBits;
+                        varpayment;
+                var i;
+                
+                if (this.toll() == null) {
+                        i = 0;
+                        targetData = new Clipperz.ByteArray("0x" + this.targetValue());
+                        targetMatchSize = this.cost();
+                
+                        payment = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32);
+                
+                        do {
+                                        varpaymentData;
+
+                                //payment = Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(32);
+                                payment.increment();
+                                paymentData = Clipperz.Crypto.SHA.sha256(payment);
+        //                      prefixMatchingBits = this.prefixMatchingBits(targetData, paymentData);
+                                prefixMatchingBits = Clipperz.ByteArray.prefixMatchingBits(targetData, paymentData);
+                                i++;
+                        } while (prefixMatchingBits < targetMatchSize);
+
+                        this._toll = payment.toHexString().substring(2)
+                }
+
+                return this;
+        },
+        */
+        //-------------------------------------------------------------------------
+
+        'innerDeferredPay': function (aTargetValue, aCost, aPayment) {
+                var deferredResult;
+                var result;
+                var payment;
+                var i;
+
+                result = null;
+                payment = aPayment;
+                i = 0;
+
+                while ((result == null) && (i < Clipperz.PM.Toll.numberOfCloseLoopIterations)) {
+                        if (Clipperz.ByteArray.prefixMatchingBits(aTargetValue, Clipperz.Crypto.SHA.sha256(payment)) > aCost) {
+                                result = payment;
+                        } else {
+                                payment.increment();
+                        }
+
+                        i ++;
+                }
+                
+                if (result == null) {
+                        deferredResult = MochiKit.Async.callLater(Clipperz.PM.Toll.pauseBetweenEachCloseLoop, MochiKit.Base.method(this, 'innerDeferredPay', aTargetValue, aCost, aPayment));
+                } else {
+                        deferredResult = MochiKit.Async.succeed(result);
+                }
+                
+                return deferredResult;
+        },
+
+        'deferredPay': function () {
+                        vardeferredResult;
+                        vartoll;
+                
+                toll = this;
+                deferredResult = new Clipperz.Async.Deferred("Toll.deferredPay");
+//deferredResult.addLog("--->>> deferredPay - " + this.cost());
+                deferredResult.addMethod(Clipperz.Crypto.PRNG.defaultRandomGenerator(), 'getRandomBytes', 32);
+                deferredResult.addMethod(toll, 'innerDeferredPay', new Clipperz.ByteArray("0x" + this.targetValue()), this.cost());
+                deferredResult.addCallback(MochiKit.Base.bind(function(aPayment) {
+                        var result;
+                
+                        result = {
+                                targetValue: this.targetValue(),
+                                toll: aPayment.toHexString().substr(2)
+                        };
+                
+                        return result;
+                }, this));
+//deferredResult.addLog("<<<--- deferredPay - " + this.cost());
+                deferredResult.callback();
+                
+                return deferredResult;
+        },
+        
+        //=========================================================================
+        __syntaxFix__: "syntax fix"
+        
+});
+
+
+Clipperz.PM.Toll.validate = function(aTargetValue, aToll, aCost) {
+        var result;
+                vartollValue;
+        var targetValue;
+        var hashedTollValue;
+        var payedToll;
+        
+        tollValue = new Clipperz.ByteArray("0x" + aToll);
+        targetValue = new Clipperz.ByteArray("0x" + aTargetValue);
+        hashedTollValue = Clipperz.Crypto.SHA.sha256(tollValue);
+        
+        payedToll = Clipperz.ByteArray.prefixMatchingBits(targetValue, hashedTollValue);
+        
+        if (payedToll < aCost) {
+                result = false;
+        } else {
+                result = true;
+        }
+        
+        return result;
+};
+
+Clipperz.PM.Toll.numberOfCloseLoopIterations = 50;
+Clipperz.PM.Toll.pauseBetweenEachCloseLoop = 0.5;
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