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Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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llSuccess = .F.

//  Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
//  server for the authentication methods it advertises.  It takes no arguments and returns a
//  lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

loSsh = createobject("CkSsh")

//  Connect to the SSH server.  Port 22 is the usual SSH port.
lnSshPort = 22
llSuccess = loSsh.Connect("ssh.example.com",lnSshPort)
if (llSuccess = .F.) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

//  Query the advertised authentication methods.  Call after Connect, before authenticating.
lcMethods = loSsh.GetAuthMethods()
if (loSsh.LastMethodSuccess = .F.) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

? "Server auth methods: " + lcMethods

loSsh.Disconnect()


release loSsh