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Blowfish Encryption, ECB, CBC, CFB modes

See more Encryption Examples

Blowfish encryption. The Chilkat encryption component supports Blowfish key sizes ranging from 32-bits to 448-bits. Chilkat's blowfish implementation supports ECB (Electronic Cookbook) , CBC (Cipher-Block Chaining), and CFB (Cipher Feedback) modes. AutoIt

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

$oCrypt = ObjCreate("Chilkat.Crypt2")

; Attention: use "blowfish2" for the algorithm name:
$oCrypt.CryptAlgorithm = "blowfish2"

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

; KeyLength (in bits) may be a number between 32 and 448.
; 128-bits is usually sufficient.  The KeyLength must be a 
; multiple of 8.
$oCrypt.KeyLength = 128

; 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.  Blowfish 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
; 256-bit encryption, the binary secret key is 32 bytes.
; For 128-bit encryption, the binary secret key is 16 bytes.
Local $sKeyHex = "000102030405060708090A0B0C0D0E0F"
$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)