(AutoIt) How to Parse a X.509 Certificate and Extract its Public Key

Demonstrates how to load an X.509 certificate and extract the public key. Chilkat supports many certificate encodings:

• DER (binary) encoded certificates (.crt/.cer)
• PEM (BASE64) encoded certificates (.pem)
• Load Certificates Directly from Windows Certificate Stores
• PFX/PKCS12 (.pfx/.p12)
• Java KeyStore (.jks)
• Cryptographic Message Syntax Standard - PKCS #7 Certificates (.P7B)

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

$oCert = ObjCreate("Chilkat.Cert")

; Load a DER (binary) encoded certificate.
; To load from a .pem or .p7b, or any other file format that contains
; just one certificate, call LoadFromFile in exactly the same way.
; The LoadFromFile method automatically detects the format and loads the certificate.
Local $bSuccess = $oCert.LoadFromFile("qa_data/certs/testCert.cer")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

; Get the public key:
Local $oPubKey = $oCert.ExportPublicKey()
If ($oCert.LastMethodSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

; Examine the key type.
; A PublicKey object can contain an RSA, ECC, or DSA public key.
; The KeyType property will contain "rsa", "ecc", or "dsa".
ConsoleWrite("key type = " & $oPubKey.KeyType & @CRLF)