AutoIt

Duplicate openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

See more RSA Examples

Demonstrates how to duplicate the creation of an RSA signature produced by this OpenSSL command:

openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

AutoIt

Local $bSuccess = False

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

$oPkey = ObjCreate("Chilkat.PrivateKey")

; Load the private key from an RSA PEM file:
$bSuccess = $oPkey.LoadPemFile("myKey.pem")

$oRsa = ObjCreate("Chilkat.Rsa")

; Import the private key into the RSA component:
$bSuccess = $oRsa.UsePrivateKey($oPkey)
If ($bSuccess = False) Then
    ConsoleWrite($oRsa.LastErrorText & @CRLF)
    Exit
EndIf

; OpenSSL uses BigEndian byte ordering:
$oRsa.LittleEndian = False

; The resulting signature will be a Base64 string:
$oRsa.EncodingMode = "base64"

; For simplicity, we're not loading
; the data to be signed from a file.  We are instead simply
; using a literal string value.  
Local $strData = "This is the text to be signed."

; Hash the input using MD5, and then sign the hash:
; Other valid hash algorithm choices are "md2" and "sha-1".
Local $sBase64Sig = $oRsa.SignStringENC($strData,"md5")

ConsoleWrite($sBase64Sig & @CRLF)

ConsoleWrite("Success!" & @CRLF)