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Set the Decryption Certificate and Private Key

Demonstrates the Chilkat Email.SetDecryptCert2 method, which explicitly provides a certificate and its corresponding private key as separate objects for decrypting a received encrypted email. Set them before loading the encrypted message. This example loads a .cer certificate and a PEM private key, sets both, then loads an encrypted email.

Background: Sometimes the certificate and its private key are stored separately — a public .cer file plus a PEM (or other format) key file — rather than combined in a PFX. SetDecryptCert2 accepts the two objects individually, which is the natural fit for that arrangement. It is the two-object counterpart to SetDecryptCert, which takes a single certificate that already carries its private key.

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Local $bSuccess = False

;  Demonstrates the SetDecryptCert2 method, which explicitly provides a certificate and its
;  corresponding private key (as separate objects) for decrypting a received encrypted
;  email.  Set them before loading the encrypted email.

$oEmail = ObjCreate("Chilkat.Email")

;  Load the certificate (public) and the matching private key from separate files.
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadFromFile("qa_data/certs/recipient.cer")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

$oPrivKey = ObjCreate("Chilkat.PrivateKey")
$bSuccess = $oPrivKey.LoadPemFile("qa_data/certs/recipient_privkey.pem")
If ($bSuccess = False) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

;  Provide the certificate and private key to use for decryption.
$bSuccess = $oEmail.SetDecryptCert2($oCert,$oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oEmail.LastErrorText & @CRLF)
    Exit
EndIf

;  Load the encrypted email; Chilkat decrypts it using the certificate and key.
$bSuccess = $oEmail.LoadEml("qa_data/eml/encrypted.eml")
If ($bSuccess = False) Then
    ConsoleWrite($oEmail.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Decrypted = " & $oEmail.Decrypted & @CRLF)

;  Note: Paths such as "qa_data/..." are relative local filesystem paths,
;  relative to the current working directory of the running application.