AutoIt
Generate CSR from Pre-Existing Private Key

Demonstrates how to generate a Certificate Signing Request (CSR) from a pre-existing RSA private key.
Note: This example requires Chilkat v9.5.0.65 or greater.
Chilkat AutoIt Downloads

AutoIt
Local $bSuccess = False

; Note: Requires Chilkat v9.5.0.65 or greater.

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

$oPrivKey = ObjCreate("Chilkat.PrivateKey")

; Load the private key from a file.
; (Chilkat provides the ability to load private keys from many different
; formats and sources..)
$bSuccess = $oPrivKey.LoadEncryptedPemFile("qa_data/rsa/privKey1.pem","password")
If (Not $bSuccess) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

; Create the CSR object and set properties.
$oCsr = ObjCreate("Chilkat.Csr")

; Specify the Common Name.  This is the only required property.
; For SSL/TLS certificates, this would be the domain name. 
; For email certificates this would be the email address. 
$oCsr.CommonName = "mysubdomain.mydomain.com"

; Country Name (2 letter code)
$oCsr.Country = "GB"

; State or Province Name (full name)
$oCsr.State = "Yorks"

; Locality Name (eg, city)
$oCsr.Locality = "York"

; Organization Name (eg, company)
$oCsr.Company = "Internet Widgits Pty Ltd"

; Organizational Unit Name (eg, secion/division)
$oCsr.CompanyDivision = "IT"

; Email address
$oCsr.EmailAddress = "support@mydomain.com"

; Create the CSR using the private key.
Local $sPemStr = $oCsr.GenCsrPem($oPrivKey)
If ($oCsr.LastMethodSuccess <> True) Then
    ConsoleWrite($oCsr.LastErrorText & @CRLF)
    Exit
EndIf

; Save the CSR..
$oFac = ObjCreate("Chilkat.FileAccess")
$oFac.WriteEntireTextFile("qa_output/csr1.pem",$sPemStr,"utf-8",False)

; Show the CSR.
ConsoleWrite($sPemStr & @CRLF)

; Sample output:
; The CSR PEM can be checked here:
; https://www.networking4all.com/en/support/tools/csr+check/
; Copy-and-paste the PEM into the online CSR Decoding / CSR Verification form

; 	-----BEGIN CERTIFICATE REQUEST-----
; 	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
; 	bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
; 	HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
; 	IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
; 	AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
; 	H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
; 	YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
; 	KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
; 	68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
; 	elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
; 	SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
; 	26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
; 	6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
; 	vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
; 	Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
; 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
; 	-----END CERTIFICATE REQUEST-----