public static void HandleAuthKeyData(Packet packet, Session session)
{
var keyData = new BinaryReader(new MemoryStream(Convert.FromBase64String(packet["KeyData"].ToString())));
var a = keyData.ReadBytes(keyData.ReadInt32());
var m = keyData.ReadBytes(keyData.ReadInt32());
session.SecureRemotePassword.CalculateU(a);
session.SecureRemotePassword.CalculateClientM(a);
if (session.SecureRemotePassword.ClientM.Compare(m))
{
session.SecureRemotePassword.CalculateServerM(m, a);
session.ClientCrypt = new RC4();
session.ClientCrypt.PrepareKey(session.SecureRemotePassword.SessionKey);
session.State = 1;
var SKeyData = new BinaryWriter(new MemoryStream());
SKeyData.Write(session.SecureRemotePassword.ServerM.Length);
SKeyData.Write(session.SecureRemotePassword.ServerM);
var reply = new Packet(StsReason.OK, packet.Header.Sequence);
reply.Xml.WriteElementRoot("Reply");
reply.Xml.WriteElement("KeyData", Convert.ToBase64String(SKeyData.ToArray()));
session.Send(reply);
}
else
{
session.Account = null;
var reply = new Packet(StsReason.Error, packet.Header.Sequence);
reply.WriteError(AuthResult.ErrBadPasswd);
session.Send(reply);
}
}
public static void HandleAuthLoginStart(Packet packet, Session session)
{
// Account.Email
var loginName = packet["LoginName"].ToString();
session.Account = DB.Auth.Single<Account>(a => a.Email == loginName);
// Support for email only.
if (loginName != null && session.Account != null)
{
session.SecureRemotePassword = new SRP6a(session.Account.Salt, loginName, session.Account.PasswordVerifier);
session.SecureRemotePassword.CalculateB();
var keyData = new BinaryWriter(new MemoryStream());
keyData.Write(session.SecureRemotePassword.S.Length);
keyData.Write(session.SecureRemotePassword.S);
keyData.Write(session.SecureRemotePassword.B.Length);
keyData.Write(session.SecureRemotePassword.B);
var reply = new Packet(StsReason.OK, packet.Header.Sequence);
reply.Xml.WriteElementRoot("Reply");
reply.Xml.WriteElement("KeyData", Convert.ToBase64String(keyData.ToArray()));
session.Send(reply);
}
else
{
// Let's use ErrBadPasswd instead of ErrAccountNotFound.
var reply = new Packet(StsReason.Error, packet.Header.Sequence);
reply.WriteError(AuthResult.ErrBadPasswd);
session.Send(reply);
}
}
