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Set the DKIM Signing Private Key

Demonstrates the Chilkat Dkim.SetDkimPrivateKey method, which supplies the RSA private key used by DkimSign. The only argument is a PrivateKey object. The source key may be destroyed after this returns, and the configured key can be reused for multiple signatures.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: DKIM proves a message really came from its domain by signing it with a private key that only the domain owner holds; recipients verify with the matching public key published in the domain's DNS. This method loads that private half into the Dkim object once, so a mail server can sign every outgoing message without re-reading the key each time. Because the key is the domain's signing secret, it should be protected like any other private key and never committed to source.

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Local $bSuccess = False

;  Demonstrates the Dkim.SetDkimPrivateKey method, which supplies the RSA private key used by
;  DkimSign.  The only argument is a PrivateKey object.

$oDkim = ObjCreate("Chilkat.Dkim")

;  Load the RSA private key that corresponds to the public key published in the domain's DNS.
$oPrivKey = ObjCreate("Chilkat.PrivateKey")
$bSuccess = $oPrivKey.LoadPemFile("qa_data/dkim_private.pem")
If ($bSuccess = False) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

;  Copy the key into the Dkim object.  The PrivateKey object may be destroyed afterward, and the
;  configured key can be reused for multiple signatures.
$bSuccess = $oDkim.SetDkimPrivateKey($oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oDkim.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("DKIM private key configured." & @CRLF)