Xbase++

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 nSuccess
LOCAL oSsh
LOCAL nSshPort
LOCAL cInfoRequestXml

nSuccess := 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.

oSsh := CreateObject("Chilkat.Ssh")

//  Connect to the SSH server.  Port 22 is the usual SSH port.
nSshPort := 22
nSuccess := oSsh:Connect("ssh.example.com", nSshPort)
IF (nSuccess == 0)
    ? oSsh:LastErrorText
    oSsh:destroy()
    RETURN
ENDIF

//  Begin keyboard-interactive authentication.  The returned XML describes the prompts.
cInfoRequestXml := oSsh:StartKeyboardAuth("mySshLogin")
IF (oSsh:LastMethodSuccess == 0)
    ? oSsh:LastErrorText
    oSsh:destroy()
    RETURN
ENDIF

? cInfoRequestXml

//  Answer the prompt(s) with ContinueKeyboardAuth.

oSsh:Disconnect()

oSsh:destroy()