Lua

Blowfish Encryption to Match PHP's Mcrypt Extension

See more Encryption Examples

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

Lua

local chilkat = require("chilkat")

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

local crypt = chilkat.Crypt2.new()

-- Use "blowfish2" to get proper results:
crypt.crypt_algorithm = "blowfish2"

-- CipherMode may be "ecb" or "cbc"
crypt.cipher_mode = "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.
crypt.key_length = 256

-- Pad with NULL bytes (PHP pads with NULL bytes)
crypt.padding_scheme = 3

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

-- The blowfish algorithm uses a 64-bit block size,
-- therefore the IV must be 8 bytes:
local ivAscii = "12345678"
crypt:set_encoded_iv(ivAscii, "ascii")

-- For 256-bit encryption, the key is 32 bytes:
local keyAscii = "1234567890123456ABCDEFGHIJKLMNOP"
crypt:set_encoded_key(keyAscii, "ascii")

local plainText = "The quick brown fox jumped over the lazy dog"

local cipherText = crypt:encrypt_string_enc(plainText)
print(cipherText)
-- Output should be (case insensitive):
-- 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

-- Do 128-bit Blowfish encryption:
crypt.key_length = 128
keyAscii = "1234567890123456"
crypt:set_encoded_key(keyAscii, "ascii")

cipherText = crypt:encrypt_string_enc(plainText)
print(cipherText)
-- Output should be (case insensitive):
-- d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca0