/* Change the password */
private bool DoChangePassword( string oldpassword, string newpassword)
{
m_connection.WriteLine("CAPABILITIES");
byte[] fln = m_connection.ReadLine();
if (fln == null)
{
SetState(State.Terminated, "server closed connection");
return false;
}
Console.WriteLine( "CAPABILITIES {0}", Encoding.UTF8.GetString(fln));
// 1. The client asks to open the password change dialog:
m_connection.WriteLine( "PASSWD");
// 2. The server accepts or not:
byte[] ln = m_connection.ReadLine();
if (ln == null)
{
SetState(State.Terminated, "server closed connection");
return false;
}
if (Protocol.IsCommand("ERR", ln))
{
SetState(State.Terminated, "password change refused: " + Protocol.CommandArg("ERR", ln));
return false;
}
else if (!Protocol.IsCommand("OK", ln))
{
SetState(State.Terminated, "protocol error initiating password change");
return false;
}
// 3. The server sends a challenge:
byte[] challenge = m_connection.ReadContent();
if (challenge == null)
{
SetState(State.Terminated, "server closed connection");
return false;
}
// 4. The client returns a message with the password
// pair (old, new) encrypted with the challenge:
m_connection.WriteContent(
Encoding.ASCII.GetBytes(
PasswordChange.Message( oldpassword, Encoding.ASCII.GetString(challenge), newpassword)));
// 5. The server accepts the password change or not:
ln = m_connection.ReadLine();
if (ln == null)
{
SetState(State.Terminated, "server closed connection");
return false;
}
if (Protocol.IsCommand("OK", ln))
{
return true;
}
else if (Protocol.IsCommand("ERR", ln))
{
SetState(State.Terminated, "password change error: " + Protocol.CommandArg("ERR", ln));
return false;
}
else
{
SetState(State.Terminated, "protocol error in password change");
return false;
}
}
