password-manager/frontend/delta/js/Clipperz/PM/Toll.js
2015-03-09 15:45:35 +01:00

189 lines
5.1 KiB
JavaScript

/*
Copyright 2008-2015 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/.
*/
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() {
var result;
var targetData;
var targetMatchSize;
var prefixMatchingBits;
var payment;
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 {
var paymentData;
//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 () {
var deferredResult;
var toll;
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;
var tollValue;
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;