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Code Issues Releases Wiki Activity

Fixed authentication procedure for offline copy

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This commit is contained in:
Giulio Cesare Solaroli
2014-06-02 13:39:16 +02:00
parent 7fdb41fa2b
commit 0422224521
3 changed files with 83 additions and 26 deletions
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27
frontend/delta/js/Clipperz/PM/Proxy/Proxy.Offline.LocalStorageDataStore.js
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@@ -88,7 +88,7 @@ Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.LocalStorageDataStore, Clipperz.P
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;
@@ -97,20 +97,35 @@ Clipperz.Base.extend(Clipperz.PM.Proxy.Offline.LocalStorageDataStore, Clipperz.P
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");