PHP Extension

Blowfish CFB Mode Encryption

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Demonstrates how to encrypt using Blowfish CFB (Cipher Feedback) mode. PHP Extension

<?php

include("chilkat.php");

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

$crypt = new CkCrypt2();

// Use "blowfish2" to produce correct results that match published blowfish test vectors.
$crypt->put_CryptAlgorithm('blowfish2');
$crypt->put_CipherMode('cfb');
$crypt->put_KeyLength(256);

// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// It may be "hex", "url", "base64", "quoted-printable", or many other choices.
$crypt->put_EncodingMode('hex');

// The block size of the blowfish algoirthm is 8 bytes, therefore the IV is 8 bytes.
$ivHex = '0001020304050607';
$crypt->SetEncodedIV($ivHex,'hex');

// The secret key must equal the size of the key.  For
// 256-bit encryption, the binary secret key is 32 bytes.
$keyHex = '603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4';
$crypt->SetEncodedKey($keyHex,'hex');

// Encrypt a string...
$encStr = $crypt->encryptStringENC('In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny. -- John Stuart Mill');
print $encStr . "\n";

$decrypt = new CkCrypt2();

$decrypt->put_CryptAlgorithm('blowfish2');
$decrypt->put_CipherMode('cfb');
$decrypt->put_KeyLength(256);
$decrypt->put_EncodingMode('hex');
$decrypt->SetEncodedIV($ivHex,'hex');
$decrypt->SetEncodedKey($keyHex,'hex');

// Now decrypt:
$decStr = $decrypt->decryptStringENC($encStr);
print $decStr . "\n";

?>