Classic ASP
SFTP use Cert's Private Key from PFX (.pfx/.p12)

Demonstrates how to use the private key associated with a certificate from a .pfx/.p12 file.
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Classic ASP
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<%
success = 0

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

set cert = Server.CreateObject("Chilkat.Cert")

pfxFilepath = "qa_data/pfx/my.pfx"
pfxPassword = "secret"

' A PFX typically contains certificates in the chain of authentication.
' The Chilkat cert object will choose the certificate w/
' private key farthest from the root authority cert.
' To access all the certificates in a PFX, use the 
' Chilkat certificate store object instead.
success = cert.LoadPfxFile(pfxFilepath,pfxPassword)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
    Response.End
End If

' Get the private key.  
set privKey = Server.CreateObject("Chilkat.PrivateKey")
success = cert.GetPrivateKey(privKey)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
    Response.End
End If

privKeyPem = privKey.GetPkcs8Pem()
If (privKey.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

set sshKey = Server.CreateObject("Chilkat.SshKey")
success = sshKey.FromOpenSshPrivateKey(privKeyPem)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( sshKey.LastErrorText) & "</pre>"
    Response.End
End If

' Connect to an SSH/SFTP server
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 with the SSH server using a username + private key.
' (The private key serves as the password.  The username identifies
' the SSH user account on the server.)
success = sftp.AuthenticatePk("mySshLogin",sshKey)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( sftp.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "OK, the connection and authentication with the SSH server is completed.") & "</pre>"

' This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...

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