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3DES Encryption, ECB, CBC modes

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3DES encryption. The Chilkat encryption component supports Triple-DES in both ECB (Electronic Cookbook) and CBC (Cipher-Block Chaining) cipher modes. AutoIt

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

$oCrypt = ObjCreate("Chilkat.Crypt2")

;  Specify 3DES for the encryption algorithm:
$oCrypt.CryptAlgorithm = "3des"

;  CipherMode may be "ecb" or "cbc"
$oCrypt.CipherMode = "cbc"

;  KeyLength must be 192.  3DES is technically 168-bits;
;  the most-significant bit of each key byte is a parity bit,
;  so we must indicate a KeyLength of 192, which includes
;  the parity bits.
$oCrypt.KeyLength = 192

;  The padding scheme determines the contents of the bytes
;  that are added to pad the result to a multiple of the
;  encryption algorithm's block size.  3DES has a block
;  size of 8 bytes, so encrypted output is always
;  a multiple of 8.
$oCrypt.PaddingScheme = 0

;  EncodingMode specifies the encoding of the output for
;  encryption, and the input for decryption.
;  It may be "hex", "url", "base64", or "quoted-printable".
$oCrypt.EncodingMode = "hex"

;  An initialization vector is required if using CBC or CFB modes.
;  ECB mode does not use an IV.
;  The length of the IV is equal to the algorithm's block size.
;  It is NOT equal to the length of the key.
Local $sIvHex = "0001020304050607"
$oCrypt.SetEncodedIV $sIvHex,"hex"

;  The secret key must equal the size of the key.  For 
;  3DES, the key must be 24 bytes (i.e. 192-bits).
Local $sKeyHex = "000102030405060708090A0B0C0D0E0F0001020304050607"
$oCrypt.SetEncodedKey $sKeyHex,"hex"

;  Encrypt a string...
;  The input string is 44 ANSI characters (i.e. 44 bytes), so
;  the output should be 48 bytes (a multiple of 8).
;  Because the output is a hex string, it should
;  be 96 characters long (2 chars per byte).
Local $sEncStr = $oCrypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.")
ConsoleWrite($sEncStr & @CRLF)

;  Now decrypt:
Local $sDecStr = $oCrypt.DecryptStringENC($sEncStr)
ConsoleWrite($sDecStr & @CRLF)