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PowerBuilder

Continue SFTP Keyboard-Interactive Authentication

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Demonstrates the Chilkat SFtp.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request with 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 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 it sees success or failure. On success, remember that InitializeSftp still must be called before any file operation.

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PowerBuilder
integer li_rc
integer li_Success
oleobject loo_Sftp
integer li_Port
string ls_InfoRequestXml
string ls_Password
string ls_Result

li_Success = 0

//  Demonstrates the SFtp.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_Sftp = create oleobject
li_rc = loo_Sftp.ConnectToNewObject("Chilkat.SFtp")
if li_rc < 0 then
    destroy loo_Sftp
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Step 1: Connect the SSH transport.  Port 22 is the usual port.
li_Port = 22
li_Success = loo_Sftp.Connect("sftp.example.com",li_Port)
if li_Success = 0 then
    Write-Debug loo_Sftp.LastErrorText
    destroy loo_Sftp
    return
end if

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

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
ls_Password = "mySshPassword"

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

Write-Debug ls_Result

//  On success, initialize the SFTP subsystem.
li_Success = loo_Sftp.InitializeSftp()
if li_Success = 0 then
    Write-Debug loo_Sftp.LastErrorText
    destroy loo_Sftp
    return
end if

loo_Sftp.Disconnect()


destroy loo_Sftp