(AutoIt) HMAC Hex String

Demonstrates how to compute an HMAC using a hexidecimal key and data.

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

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

$oCrypt = ObjCreate("Chilkat.Crypt2")

; Set the MAC algorithm to HMAC
$oCrypt.MacAlgorithm = "hmac"

; Our HMAC key will be the bytes represented in the following hex string.
; In other words, the HMAC key is composed of the bytes 0x41, 0xC2, 0x1C, ...
; (It is not composed of the us-ascii string '4', '1', 'C', ...)
Local $sKeyHex = "41C21CB9D7A02FC5D4FADB9E4755B9DE"
Local $bSuccess = $oCrypt.SetMacKeyEncoded($sKeyHex,"hex")

; Our desire is to HMAC the bytes represented in the following string:
Local $sDataHex = "C22078065B01460001000000010062043BF5B18228C8E02D17BCFE4E00561FA6DEC216EA97195CEB579942E275C21932258E3CD391E507FF4E7FD4C787A8447DA111C54A9C1795E7FF4C0BAA2EDA"

; We'll need to decode the hex to binary:
$oBd = ObjCreate("Chilkat.BinData")
$oBd.AppendEncoded($sDataHex,"hex")

; Do the HMAC-SHA256 hash and return as a hex string:
$oCrypt.EncodingMode = "hex"
$oCrypt.HashAlgorithm = "sha-256"
Local $sMacHex = $oCrypt.MacBdENC($oBd)
ConsoleWrite($sMacHex & @CRLF)