| public static Calcu ( NetBigInteger A, NetBigInteger B ) : NetBigInteger | ||
| A | NetBigInteger | |
| B | NetBigInteger | |
| return | NetBigInteger | |
/// <summary>
/// Generates key from request
/// </summary>
/// <param name="A">Generated A from request</param>
/// <param name="v">Verifier v</param>
private void KeyFromRequest(NetBigInteger A, NetBigInteger v)
{
// Shared random scrambler
Lidgren.Network.NetBigInteger u = NetSRP.Calcu(A, _cache.B);
// Sessionkey
_cache.S = NetSRP.CalcSServer(N, A, v, u, _cache.b);
_cache.K = NetSRP.CalcK(_cache.S);
}
/// <summary>
/// Generates Session key from response
/// </summary>
/// <param name="response"></param>
/// <response></response>
private NetSRP.Verification KeyFromResponse(NetSRP.Response response)
{
if ((Handshake.State.AllowVerificating & this.HandshakeState) != this.HandshakeState)
{
return(_verification); // Double Request
}
// When we get the response, get their public key B
if (response.B.Mod(N).IntValue == 0)
{
this.HandshakeState = Handshake.State.Failed;
throw new NetSRP.HandShakeException("Response contains invalid data", new ArgumentException("B mod N is zero."));
}
// Shared random scrambler
NetBigInteger u = NetSRP.Calcu(_cache.A, response.B);
if (u.IntValue == 0)
{
this.HandshakeState = Handshake.State.Failed;
throw new NetSRP.HandShakeException("Response contains invalid data", new ArgumentException("u is zero."));
}
// Private key x
NetBigInteger x = NetSRP.Calcx(response.Salt, _request.Username, _cache.UserData);
// Cache Response;
_response = response;
// Session key
_cache.S = NetSRP.CalcSClient(N, g, response.B, k, x, _cache.a, u);
_cache.K = NetSRP.CalcK(_cache.S);
// Create the verification
_verification = new NetSRP.Verification(NetSRP.CalcM(N, g, _request.Username, response.Salt, _cache.A, response.B, _cache.K));
// Set State
this.HandshakeState = Handshake.State.Verificating;
return(_verification);
}