public override void HandlePacket(LobbyClient client, ServerPacket packet)
{
var reader = packet.Reader;
var srpClient = new WeakSrp6Client();
var secureRandom = new SecureRandom();
srpClient.Init(new BigInteger(Modulus), new BigInteger(Generator), new Sha1Digest(), secureRandom);
uint accountId = reader.ReadUInt32();
byte[] serverB = reader.ReadBytes(64);
ushort serverBLen = reader.ReadUInt16();
byte[] salt = reader.ReadBytes(10);
client.AccountID = accountId;
BigInteger serverBInt = new BigInteger(1, serverB, 0, serverBLen);
byte[] usernameBytes = Encoding.ASCII.GetBytes(accountId.ToString()), passwordBytes = Encoding.ASCII.GetBytes(client.Password);
BigInteger clientPub = srpClient.GenerateClientCredentials(salt, usernameBytes, passwordBytes);
srpClient.CalculateSecret(serverBInt);
client.SrpKey = srpClient.CalculateSessionKey().ToByteArrayUnsigned();
BigInteger proof = srpClient.CalculateClientEvidenceMessage();
var loginProof = new GC2LS_LOGIN_PROOF(clientPub.ToByteArrayUnsigned(), proof.ToByteArrayUnsigned());
client.SendPacket(loginProof);
}
public override void HandlePacket(LobbyClient client, ServerPacket packet)
{
var reader = packet.Reader;
// Initialise the SRP client
var srpClient = new WeakSrp6Client();
var secureRandom = new SecureRandom();
srpClient.Init(new BigInteger(Modulus), new BigInteger(Generator), new Sha1Digest(), secureRandom);
// Read data from packet
uint accountId = reader.ReadUInt32();
byte[] serverB = reader.ReadBytes(64);
ushort serverBLen = reader.ReadUInt16();
byte[] salt = reader.ReadBytes(10);
Log.Info($"Account ID = 0x{accountId:X}");
client._accountId = accountId;
// Transform values into types the SRP client expects
BigInteger serverBInt = new BigInteger(1, serverB, 0, serverBLen);
byte[] usernameBytes = Encoding.ASCII.GetBytes(accountId.ToString());
byte[] passwordBytes = Encoding.ASCII.GetBytes(client._password);
// Calculate the client's public value
BigInteger clientPub = srpClient.GenerateClientCredentials(salt, usernameBytes, passwordBytes);
srpClient.CalculateSecret(serverBInt);
client._srpKey = srpClient.CalculateSessionKey().ToByteArrayUnsigned();
// Calculate the proof that the client knows the secret
BigInteger proof = srpClient.CalculateClientEvidenceMessage();
var loginProof = new GC2LS_LOGIN_PROOF(clientPub.ToByteArrayUnsigned(), proof.ToByteArrayUnsigned());
client.SendPacket(loginProof);
}