(Visual FoxPro) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loCert
LOCAL loPrivKey
LOCAL lcPrivKeyPem
LOCAL loSshKey
LOCAL loSftp

lnSuccess = 0

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

loCert = CreateObject('Chilkat.Cert')

* Load the certificate from the Windows certificate store
lnSuccess = loCert.LoadByCommonName("my_cert_common_name")
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

* Get the private key.  
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loCert.GetPrivateKey(loPrivKey)
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

lcPrivKeyPem = loPrivKey.GetPkcs8Pem()
IF (loPrivKey.LastMethodSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    CANCEL
ENDIF

loSshKey = CreateObject('Chilkat.SshKey')
lnSuccess = loSshKey.FromOpenSshPrivateKey(lcPrivKeyPem)
IF (lnSuccess = 0) THEN
    ? loSshKey.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    RELEASE loSshKey
    CANCEL
ENDIF

* Connect to an SSH/SFTP server
loSftp = CreateObject('Chilkat.SFtp')
lnSuccess = loSftp.Connect("sftp.example.com",22)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    RELEASE loSshKey
    RELEASE loSftp
    CANCEL
ENDIF

* 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.)
lnSuccess = loSftp.AuthenticatePk("mySshLogin",loSshKey)
IF (lnSuccess = 0) THEN
    ? loSftp.LastErrorText
    RELEASE loCert
    RELEASE loPrivKey
    RELEASE loSshKey
    RELEASE loSftp
    CANCEL
ENDIF

? "OK, the connection and authentication with the SSH server is completed."

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

RELEASE loCert
RELEASE loPrivKey
RELEASE loSshKey
RELEASE loSftp