AutoIt

Working with PEM Encrypted Private Keys

See more PEM Examples

Demonstrates how to load and save PEM encrypted private keys. AutoIt

Local $bSuccess = False

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

$bSuccess = False

$oPem = ObjCreate("Chilkat.Pem")

Local $sPemPassword = "secret"

; To load a PEM file containing encrypted private keys, simply
; provide the password.
$bSuccess = $oPem.LoadPemFile("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem",$sPemPassword)
If ($bSuccess = False) Then
    ConsoleWrite($oPem.LastErrorText & @CRLF)
    Exit
EndIf

$oFac = ObjCreate("Chilkat.FileAccess")
Local $sPemText = $oFac.ReadEntireTextFile("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem",$sPemPassword)

; To load a PEM from a string, call LoadPem instead of LoadPemFile:
$bSuccess = $oPem.LoadPem($sPemText)
If ($bSuccess = False) Then
    ConsoleWrite($oPem.LastErrorText & @CRLF)
    Exit
EndIf

; A few notes:
; The PEM may contain both private keys and certificates (or anything else).
; The password is utilized for whatever content in the PEM is encrypted.  
; It is OK to have both encrypted and non-encrypted content within a given PEM.

; PEM private keys can be encrypted in different formats.  The LoadPem and LoadPemFile
; methods automatically handle the different formats.
; One format is PKCS8 and is indicated by this delimiter within the PEM:

; -----BEGIN ENCRYPTED PRIVATE KEY-----
; MIICoTAbBgkqhkiG9w0BBQMwDgQIfdD0zv24lgkCAggABIICgE0PdHJmRbNs6cBX
; ...

; Another format, we'll call "passphrase" looks like this in the PEM:
; -----BEGIN RSA PRIVATE KEY-----
; Proc-Type: 4,ENCRYPTED
; DEK-Info: DES-EDE3-CBC,A4215544D11C5D0C
; 
; paqy9XRexcSjurHfG0xhCaUD0HrvIdhuC0CbRxxxeMlkLaV6+uT80rBxt2AaibWG
; ...

; Show the bit length of each private key:
Local $i
Local $iNumPrivateKeys = $oPem.NumPrivateKeys
If ($iNumPrivateKeys = 0) Then
    ConsoleWrite((("Error: Expected the PEM to contain private keys.")) & @CRLF)
    Exit
EndIf

$oPrivKey = ObjCreate("Chilkat.PrivateKey")
For $i = 1 To $iNumPrivateKeys
    $oPem.PrivateKeyAt($i - 1,$oPrivKey)
    ConsoleWrite($i & ": " & $oPrivKey.BitLength & " bits" & @CRLF)
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