Fixed authentication procedure for offline copy

1 files changed, 21 insertions, 6 deletions

diff --git a/frontend/delta/js/Clipperz/PM/Proxy/Proxy.Offline.LocalStorageDataStore.js b/frontend/delta/js/Clipperz/PM/Proxy/Proxy.Offline.LocalStorageDataStore.js
index 3f16f70..d03f873 100644
--- a/frontend/delta/js/Clipperz/PM/Proxy/Proxy.Offline.LocalStorageDataStore.js
+++ b/frontend/delta/js/Clipperz/PM/Proxy/Proxy.Offline.LocalStorageDataStore.js
@@ -43,119 +43,134 @@ Clipperz.PM.Proxy.Offline.LocalStorageDataStore = function(args) {
 	
 	return this;
 }
 
 Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.LocalStorageDataStore, Clipperz.PM.Proxy.Offline.DataStore, {
 
 	//=========================================================================
 
 	'_knock': function(aConnection, someParameters) {
 		var result;
 		
 		result = {
 			toll: this.getTollForRequestType(someParameters['requestType'])
 		}
 		
 		return result;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'_registration': function(aConnection, someParameters) {
 		throw Clipperz.PM.Proxy.Offline.DataStore.exception.ReadOnly;
 	},
 
 	//-------------------------------------------------------------------------
 
 	'_handshake': function(aConnection, someParameters) {
 		var result;
 		var	nextTollRequestType;
 
 		result = {};
 		if (someParameters.message == "connect") {
 			var userData;
 			var randomBytes;
 			var v;
 
 			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 {
 				if (typeof(otpData) != 'undefined') {
 					if (otpData['status'] == 'ACTIVE') {
 						if (otpData['key_checksum'] == someParameters.parameters.oneTimePasswordKeyChecksum) {
 							result = {
 								'data':		otpData['data'],
 								'version':	otpData['version']
 							}
 
 							otpData['status'] = 'REQUESTED';
 						} else {
 							otpData['status'] = 'DISABLED';
 							throw "The requested One Time Password has been disabled, due to a wrong keyChecksum";
 						}
 					} else {
 						throw "The requested One Time Password was not active";
 					}
 				} else {
 					throw "The requested One Time Password has not been found"
 				}
 			} catch (exception) {
 				result = {
 					'data':		Clipperz.PM.Crypto.randomKey(),
 					'version':	Clipperz.PM.Connection.communicationProtocol.currentVersion
 				}
 			}
 			nextTollRequestType = 'CONNECT';
 		} else {
 			Clipperz.logError("Clipperz.PM.Proxy.Test.handshake - unhandled message: " + someParameters.message);
 		}
 
 		result = {
 			result: result,
 			toll:   this.getTollForRequestType(nextTollRequestType)
 		}
 
 		return result;