Fixed authentication procedure for offline copy

1 files changed, 25 insertions, 10 deletions

diff --git a/frontend/gamma/js/Clipperz/PM/Proxy/Proxy.Offline.DataStore.js b/frontend/gamma/js/Clipperz/PM/Proxy/Proxy.Offline.DataStore.js
index b806cb7..e5f68a8 100644
--- a/frontend/gamma/js/Clipperz/PM/Proxy/Proxy.Offline.DataStore.js
+++ b/frontend/gamma/js/Clipperz/PM/Proxy/Proxy.Offline.DataStore.js
@@ -27,25 +27,25 @@ try { if (typeof(Clipperz.PM.Proxy.Offline) == 'undefined') { throw ""; }} catch
 
 //=============================================================================
 
 Clipperz.PM.Proxy.Offline.DataStore = function(args) {
 	args = args || {};
 	
 	this._data = args.data || (typeof(_clipperz_dump_data_) != 'undefined' ? _clipperz_dump_data_ : null);
 	this._isReadOnly = (typeof(args.readOnly) == 'undefined' ? true : args.readOnly);
 	this._shouldPayTolls = args.shouldPayTolls || false;
 
 	this._tolls = {};
 	this._currentStaticConnection = null;
-	
+
 	return this;
 }
 
 Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.DataStore, Object, {
 
 	//-------------------------------------------------------------------------
 
 	'isReadOnly': function () {
 		return this._isReadOnly;
 	},
 	
 	//-------------------------------------------------------------------------
@@ -282,32 +282,32 @@ Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.DataStore, Object, {
 					'v':		someParameters['credentials']['v'],
 					'version':	someParameters['credentials']['version'],
 //					'lock':		Clipperz.Crypto.Base.generateRandomSeed(),
 					'userDetails':			someParameters['user']['header'],
 					'statistics':			someParameters['user']['statistics'],
 					'userDetailsVersion':	someParameters['user']['version'],
 					'records':	{}
 				}
 			} else {
 				throw "user already exists";
 			}
 		} else {
-			throw Clipperz.PM.Proxy.Offline.DataStore.exception.ReadOnly;
+		throw Clipperz.PM.Proxy.Offline.DataStore.exception.ReadOnly;
 		}
 
 		result = {
 			result: {
 				'lock':		this.data()['users'][someParameters['credentials']['C']]['lock'],
 				'result':	'done'
-			},
+	},
 			toll:   this.getTollForRequestType('CONNECT')
 		}
 
 		return result;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'_handshake': function(aConnection, someParameters) {
 		var result;
 		var	nextTollRequestType;
 
@@ -320,47 +320,62 @@ Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.DataStore, Object, {
 			userData = this.data()['users'][someParameters.parameters.C];
 			
 			if ((typeof(userData) != 'undefined') && (userData['version'] == someParameters.version)) {
 				aConnection['userData'] = userData;
 				aConnection['C'] = someParameters.parameters.C;
 			} else {
 				aConnection['userData'] = this.data()['users']['catchAllUser'];
 			}
 
 			randomBytes = Clipperz.Crypto.Base.generateRandomSeed();
 			aConnection['b'] = new Clipperz.Crypto.BigInt(randomBytes, 16);
 			v = new Clipperz.Crypto.BigInt(aConnection['userData']['v'], 16);
-			aConnection['B'] = v.add(Clipperz.Crypto.SRP.g().powerModule(aConnection['b'], Clipperz.Crypto.SRP.n()));
+			aConnection['B'] = (Clipperz.Crypto.SRP.k().multiply(v)).add(Clipperz.Crypto.SRP.g().powerModule(aConnection['b'], Clipperz.Crypto.SRP.n()));
 			
 			aConnection['A'] = someParameters.parameters.A;
 			
 			result['s'] = aConnection['userData']['s'];
 			result['B'] = aConnection['B'].asString(16);
 			
 			nextTollRequestType = 'CONNECT';
 		} else if (someParameters.message == "credentialCheck") {
-			var v, u, S, A, K, M1;
-			
+			var v, u, s, S, A, K, M1;
+			var stringHash = function (aValue) {
+				return Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(aValue)).toHexString().substring(2);
+			};
+
 			v = new Clipperz.Crypto.BigInt(aConnection['userData']['v'], 16);
-			u = new Clipperz.Crypto.BigInt(Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(aConnection['B'].asString(10))).toHexString(), 16);
 			A = new Clipperz.Crypto.BigInt(aConnection['A'], 16);
+			u = new Clipperz.Crypto.BigInt(Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(A.asString(10) + aConnection['B'].asString(10))).toHexString(), 16);
+			s = new Clipperz.Crypto.BigInt(aConnection['userData']['s'], 16);
 			S = (A.multiply(v.powerModule(u, Clipperz.Crypto.SRP.n()))).powerModule(aConnection['b'], Clipperz.Crypto.SRP.n());
 
-			K = Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(S.asString(10))).toHexString().slice(2);
+			K = stringHash(S.asString(10));
 
-			M1 = Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(A.asString(10) + aConnection['B'].asString(10) + K)).toHexString().slice(2);
+			M1 = stringHash(
+				"597626870978286801440197562148588907434001483655788865609375806439877501869636875571920406529" +
+				stringHash(aConnection['C']) +
+				s.asString(10) +
+				A.asString(10) +
+				aConnection['B'].asString(10) +
+				K
+			);
 			if (someParameters.parameters.M1 == M1) {
 				var M2;
 				
-				M2 = Clipperz.PM.Crypto.encryptingFunctions.versions[someParameters.version].hash(new Clipperz.ByteArray(A.asString(10) + someParameters.parameters.M1 + K)).toHexString().slice(2);
+				M2 = stringHash(
+					A.asString(10) +
+					someParameters.parameters.M1 +
+					K
+				);
 				result['M2'] = M2;
 			} else {
 				throw new Error("Client checksum verification failed! Expected <" + M1 + ">, received <" + someParameters.parameters.M1 + ">.", "Error");
 			}
 
 			nextTollRequestType = 'MESSAGE';
 		} else if (someParameters.message == "oneTimePassword") {
 			var otpData;
 			
 			otpData = this.data()['onetimePasswords'][someParameters.parameters.oneTimePasswordKey];
 
 			try {