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PowerBuilder

Continue SSH Keyboard-Interactive Authentication

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Demonstrates the Chilkat Ssh.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request containing multiple prompts, an XML response is supplied instead. It returns XML indicating the next prompt or the final result.

Background: This is the second half of the keyboard-interactive exchange started by StartKeyboardAuth. A server may issue several rounds of prompts, so a robust client loops: submit answers, read the returned XML, and continue until authentication succeeds or fails. Prompt responses are typically secrets, so obtain them from interactive input rather than embedding them in code.

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PowerBuilder
integer li_rc
integer li_Success
oleobject loo_Ssh
integer li_SshPort
string ls_InfoRequestXml
string ls_Response
string ls_Result

li_Success = 0

//  Demonstrates the Ssh.ContinueKeyboardAuth method, which submits a response to a
//  keyboard-interactive prompt.  The only argument is the response.  For multiple prompts, an
//  XML response is supplied instead.

loo_Ssh = create oleobject
li_rc = loo_Ssh.ConnectToNewObject("Chilkat.Ssh")
if li_rc < 0 then
    destroy loo_Ssh
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Connect to the SSH server.  Port 22 is the usual SSH port.
li_SshPort = 22
li_Success = loo_Ssh.Connect("ssh.example.com",li_SshPort)
if li_Success = 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

//  Begin keyboard-interactive authentication to receive the server's prompt(s).
ls_InfoRequestXml = loo_Ssh.StartKeyboardAuth("mySshLogin")
if loo_Ssh.LastMethodSuccess = 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

//  Normally you would not hard-code the response (typically the password) in source.  You
//  should instead obtain it from an interactive prompt.
ls_Response = "mySshPassword"

//  Submit the response.  The returned XML indicates the next prompt or the final result.
ls_Result = loo_Ssh.ContinueKeyboardAuth(ls_Response)
if loo_Ssh.LastMethodSuccess = 0 then
    Write-Debug loo_Ssh.LastErrorText
    destroy loo_Ssh
    return
end if

Write-Debug ls_Result

loo_Ssh.Disconnect()


destroy loo_Ssh