Visual FoxPro

Start SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts and whether each response should be echoed. Answer the prompts with ContinueKeyboardAuth.

Background: Keyboard-interactive is the flexible, prompt-driven SSH method — the server sends one or more questions (a password, a one-time code, a security question) and the client answers each. It is how SSH supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask the user and whether to mask their input.

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LOCAL lnSuccess
LOCAL loSsh
LOCAL lnSshPort
LOCAL lcInfoRequestXml

lnSuccess = 0

*  Demonstrates the Ssh.StartKeyboardAuth method, which begins keyboard-interactive
*  authentication.  The only argument is the login name.  It returns XML describing the server's
*  prompts and whether each response should be echoed.

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

*  Begin keyboard-interactive authentication.  The returned XML describes the prompts.
lcInfoRequestXml = loSsh.StartKeyboardAuth("mySshLogin")
IF (loSsh.LastMethodSuccess = 0) THEN
    ? loSsh.LastErrorText
    RELEASE loSsh
    CANCEL
ENDIF

? lcInfoRequestXml

*  Answer the prompt(s) with ContinueKeyboardAuth.

loSsh.Disconnect()

RELEASE loSsh