(AutoIt) Create PEM-encoded PKCS#7 Detached Signature

See more Digital Signatures Examples

Demonstrates how to create a PKCS7 PEM-encoded object containing a detached signature.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

$oCert = ObjCreate("Chilkat.Cert")

; Load the cert and private key.
Local $bSuccess = $oCert.LoadPfxFile("qa_data/pfx/myCertAndKey.p12","password")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

$oCrypt = ObjCreate("Chilkat.Crypt2")

$bSuccess = $oCrypt.SetSigningCert($oCert)
If ($bSuccess <> True) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

; Use SHA-256
$oCrypt.HashAlgorithm = "sha256"

; Hash the utf-8 byte representation of the string
$oCrypt.Charset = "utf-8"

; Return the result in base64
$oCrypt.EncodingMode = "base64Mime"

; Sign some text to create a detached signature (i.e. a signature that does not include the signed data)
Local $sTextToSign = "This is the text to be hashed and signed."
Local $sigBase64 = $oCrypt.SignStringENC($sTextToSign)
If ($oCrypt.LastMethodSuccess <> True) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($sigBase64 & @CRLF)

; The result:

; MIIWbgYJKoZIhvcNAQcCoIIWXzCCFlsCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
; ghMXMIIFuzCCA6OgAwIBAgIIVwoRl0LE48wwDQYJKoZIhvcNAQELBQAwazELMAkGA1UEBhMCSVQx
; ...
; ...

; If we want it in PEM format with just LF line-endings:
$oSb = ObjCreate("Chilkat.StringBuilder")
; Just LF line endings, not CRLF.
Local $bCrlf = False
$oSb.AppendLine("-----BEGIN PKCS7-----",$bCrlf)
$oSb.Append($sigBase64)
$oSb.AppendLine("-----END PKCS7-----",$bCrlf)
$oSb.ToLF()

; Save to a file.
$oSb.WriteFile("c:/temp/qa_output/sig.pem","utf-8",False)

; Examine..
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Result is:

; -----BEGIN PKCS7-----
; MIIWbgYJKoZIhvcNAQcCoIIWXzCCFlsCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg
; ghMXMIIFuzCCA6OgAwIBAgIIVwoRl0LE48wwDQYJKoZIhvcNAQELBQAwazELMAkGA1UEBhMCSVQx
; DjAMBgNVBAcMBU1pbGFuMSMwIQYDVQQKDBpBY3RhbGlzIFMucC5BLi8wMzM1ODUyMDk2NzEnMCUG
; A1UEAwweQWN0YWxpcyBBdXRoZW50aWNhdGlvbiBSb290IENBMB4XDTExMDkyMjExMjIwMloXDTMw
; MDkyMjExMjIwMlowazELMAkGA1UEBhMCSVQxDjAMBgNVBAcMBU1pbGFuMSMwIQYDVQQKDBpBY3Rh
; bGlzIFMucC5BLi8wMzM1ODUyMDk2NzEnMCUGA1UEAwweQWN0YWxpcyBBdXRoZW50aWNhdGlvbiBS
; b290IENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAp8bEpSmkLO/lGMWwUKNvUTuf
; ClrJwkg4CsIcoBh/kbWHuUA/3R1oHwiD1S0eiKD4j1aPbZkCkpAW1V8IbInX4ay8IMKx4INRimlN
; AJZaby/ARH6jDuSRzVju3PvHHkVH3Se5CAGfpiEd9UEtL0z9KK3giq0itFZljoZUj5NDKd45Rnij
; MCO6zfB9E1fAXdKDa0hMxKufgFpbOr3JpyI/gCczWw63igxdBzcIy2zSekciRDXFzMwujt0q7bd9
; ...
; ...
; -----END PKCS7-----