Classic ASP Requires Chilkat v11.0.0+

SFTP Auth Failure Reason (AuthenticatePwPk)

This example demonstrates how to determine the failure reason for the case where both a password and private key are required for authentication. If authentication fails, was it because of an invalid private key, or an invalid password?

Chilkat Classic ASP Downloads

Download Chilkat for Classic ASP

Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Load a private key to be used for SSH authentication.
set key = Server.CreateObject("Chilkat.SshKey")
key.Password = "key_password"

success = key.FromOpenSshPrivateKey(key.LoadText("qa_data/my_private_key_file"))
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( key.LastErrorText) & "</pre>"
    Response.End
End If

set sftp = Server.CreateObject("Chilkat.SFtp")

success = sftp.Connect("sftp.example.com",22)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( sftp.LastErrorText) & "</pre>"
    Response.End
End If

'  Authenticate using both a password and private key.
success = sftp.AuthenticatePwPk("myLogin","myPassword",key)
If (success = 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Authentication is successful!") & "</pre>"
    Response.End
End If

'  If we get here, it means the authentication failed.
'  Examine the last JSON data..

set json = Server.CreateObject("Chilkat.JsonObject")
sftp.GetLastJsonData json

json.EmitCompact = 0

'  This is the JSON if the key is correct, but the password is incorrect:

'  {
'    "public_key_type": "rsa",
'    "partialAuthResult": "publickey success. continue to authenticate with password...",
'    "authResult": "failed",
'    "authFailReason": "Password is incorrect"
'  }

'  This is the JSON if the key is incorrect.  We won't know if the password is also incorrect until
'  the key is made correct so that authentication proceeds to check the password.

'  {
'    "public_key_type": "rsa",
'    "authResult": "failed",
'    "authFailReason": "Key is incorrect"
'  }

'  To get the authResult anbd authFailReason:
Response.Write "<pre>" & Server.HTMLEncode( "authResult: " & json.StringOf("authResult")) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "authFailReason: " & json.StringOf("authFailReason")) & "</pre>"

%>
</body>
</html>