AutoIt

Add a Detached Signature (Header Placement Control)

Demonstrates the Chilkat Mime.AddDetachedSignature2 method, which creates the same multipart/signed structure as AddDetachedSignature, with a second argument controlling whether the existing message header fields are transferred to the new outer entity.

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: Signing wraps the content in a new outer multipart/signed, which raises the question of where the message-level headers (Subject, From, To) should live. This variant lets you choose: transfer them up to the outer entity so the signed message looks like a normal email, or leave them on the inner part. Transferring is typical for email; the finer control matters when the signed entity is embedded in a larger structure.

Chilkat AutoIt Downloads

Download Chilkat for AutoIt

AutoIt

Local $bSuccess = False

$oMime = ObjCreate("Chilkat.Mime")
$bSuccess = $oMime.SetBodyFromPlainText("This message will be signed.")
If ($bSuccess = False) Then
    ConsoleWrite($oMime.LastErrorText & @CRLF)
    Exit
EndIf

;  Load the signing certificate (which must have access to its private key) from a PFX file.
;  The PFX password should come from a secure source rather than being hard-coded.
Local $sPfxPassword = "myPfxPassword"
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadPfxFile("qa_data/signer.pfx",$sPfxPassword)
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

;  AddDetachedSignature2 is the same as AddDetachedSignature, but the 2nd argument controls whether
;  the existing message header fields are transferred to the new outer multipart/signed entity.
Local $bTransferHeaderFields = True
$bSuccess = $oMime.AddDetachedSignature2($oCert,$bTransferHeaderFields)
If ($bSuccess = False) Then
    ConsoleWrite($oMime.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oMime.SaveMime("qa_output/signed.eml")
If ($bSuccess = False) Then
    ConsoleWrite($oMime.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Detached signature added (headers transferred)." & @CRLF)