Is it possible to change a users SFTP password (renci.sshnet)

Question

Does anyone know if it is possible to programmatically change a users password on an SFTP site using SSH.NET library (Renci.SshNet)? I have not been able to find anything definitive either way.

If it is I would appreciate any pointers you can provide.

Answer 1

No. While there's an API in the SSH protocol to change a password on request, the explicitly request is not implemented by the SSH.NET library.

In the SSH.NET library, you can only only change the password, if the server asks for it. Typically a servers asks for a password change, when the previous password has expired. In the SSH.NET library, this server request is implemented as the PasswordExpired event.

---

Though if you are willing to modify the SSH.NET library, see the PasswordAuthenticationMethod.Session_UserAuthenticationPasswordChangeRequiredReceived method. It sends the password change request like:

_session.SendMessage(
    new RequestMessagePassword(
        ServiceName.Connection, Username, _password, eventArgs.NewPassword))

If you implement your own AuthenticationMethod that sends the RequestMessagePassword with the eventArgs.NewPassword directly in the implementation of the Authenticate method, it should do what you need.