(Lianja) 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.

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

loCert = createobject("CkCert")

// Load the certificate from the Windows certificate store
llSuccess = loCert.LoadByCommonName("my_cert_common_name")
if (llSuccess = .F.) then
    ? loCert.LastErrorText
    release loCert
    return
endif

// Get the private key.  
loPrivKey = loCert.ExportPrivateKey()
if (loCert.LastMethodSuccess = .F.) then
    ? loCert.LastErrorText
    release loCert
    return
endif

lcPrivKeyPem = loPrivKey.GetPkcs8Pem()
if (loPrivKey.LastMethodSuccess = .F.) then
    ? loPrivKey.LastErrorText
    release loCert
    return
endif

loSshKey = createobject("CkSshKey")
llSuccess = loSshKey.FromOpenSshPrivateKey(lcPrivKeyPem)
if (llSuccess = .F.) then
    ? loSshKey.LastErrorText
    release loCert
    release loSshKey
    return
endif

// Connect to an SSH/SFTP server
loSftp = createobject("CkSFtp")
llSuccess = loSftp.Connect("sftp.example.com",22)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loCert
    release loSshKey
    release loSftp
    return
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.)
llSuccess = loSftp.AuthenticatePk("mySshLogin",loSshKey)
if (llSuccess = .F.) then
    ? loSftp.LastErrorText
    release loCert
    release loSshKey
    release loSftp
    return
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 loSshKey
release loSftp