Visual FoxPro

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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LOCAL lnSuccess
LOCAL loSsh
LOCAL lnSshPort
LOCAL lcMethods

lnSuccess = 0

*  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('Chilkat.Ssh')

*  Connect to the SSH server.  Port 22 is the usual SSH port.
lnSshPort = 22
lnSuccess = loSsh.Connect("ssh.example.com",lnSshPort)
IF (lnSuccess = 0) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    CANCEL
ENDIF

*  Query the advertised authentication methods.  Call after Connect, before authenticating.
lcMethods = loSsh.GetAuthMethods()
IF (loSsh.LastMethodSuccess = 0) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    CANCEL
ENDIF

? "Server auth methods: " + lcMethods

loSsh.Disconnect()

RELEASE loSsh