(AutoIt) Encrypt File using X.509 Certificate using AES in CBC Mode

Demonstrates how to encrypt a file using an X.509 Certificate's public key, where the underlying bulk encryption algorithm is 128-bit AES in CBC mode. (The underlying bulk encryption algorithm can be specified to be other algorithms/strengths.)

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

$oCrypt = ObjCreate("Chilkat.Crypt2")

; Use public-key cryptography for encryption.
$oCrypt.CryptAlgorithm = "pki"

; Get an X.509 certificate to use for encrypting.
; Note: Chilkat provides many different ways of loading a certificate, from many different formats,
; or if on Windows, from the installed certificates on the system.
; This example simply loads a certificate from a file.
; Also, for encryption, only the public key is needed.  Digital certificates embed the public key
; within the X.509 format itself.  Therefore, if you have a certificate, you also have the public key.
$oCert = ObjCreate("Chilkat.Cert")
Local $bSuccess = $oCert.LoadFromFile("qa_data/certs/testCert.cer")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

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

; Indicate the underlying bulk encryption algorithm to be used:
$oCrypt.Pkcs7CryptAlg = "aes"
$oCrypt.KeyLength = 128

; Note: When doing public-key encryption the underlying bulk symmetric cipher mode will always be CBC. (at least with Chilkat...)

; There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
; By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to True to
; use RSAES_OAEP.  (We'll leave it set at the default value of False)
$oCrypt.OaepPadding = False

; Everything is specified.  Now just encrypt...
; The output is PKCS7 in binary DER format.
$bSuccess = $oCrypt.CkEncryptFile("qa_data/hamlet.xml","qa_output/hamlet.p7")
If ($bSuccess <> True) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Finished." & @CRLF)