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(PHP Extension) Blowfish CFB Mode EncryptionDemonstrates how to encrypt using Blowfish CFB (Cipher Feedback) mode.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.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"; ?> |
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