\AKEncryptionAES

AES implementation in PHP (c) Chris Veness 2005-2011 (http://www.movable-type.co.uk/scripts/aes-php.html) I offer these formulæ & scripts for free use and adaptation as my contribution to the open-source info-sphere from which I have received so much. You are welcome to re-use these scripts [under a simple attribution license or a GPL licence, without any warranty express or implied] provided solely that you retain my copyright notice and a link to this page.

licence. No warranty of any form is offered.

Modified for Akeeba Backup by Nicholas K. Dionysopoulos

Synopsis

class AKEncryptionAES {

• // members
• protected  $Sbox;
• protected  $Rcon;
• protected  $passwords;
• // methods
• protected static ciphertext Cipher()
• protected static void AddRoundKey()
• protected static void SubBytes()
• protected static void ShiftRows()
• protected static void MixColumns()
• protected static key KeyExpansion()
• protected static void SubWord()
• protected static void RotWord()
• protected static void urs()
• public static encrypted AESEncryptCtr()
• public static decrypted AESDecryptCtr()
• public static string AESDecryptCBC()
}


Members

protected

• $Rcon
• $Sbox
• $passwords

Methods

protected

• AddRoundKey()
• Cipher() — AES Cipher function: encrypt 'input' with Rijndael algorithm
• KeyExpansion() — Key expansion for Rijndael Cipher(): performs key expansion on cipher key to generate a key schedule
• MixColumns()
• RotWord()
• ShiftRows()
• SubBytes()
• SubWord()
• urs()

public

• AESDecryptCBC() — AES decryption in CBC mode. This is the standard mode (the CTR methods actually use Rijndael-128 in CTR mode, which - technically - isn't AES).
• AESDecryptCtr() — Decrypt a text encrypted by AES in counter mode of operation
• AESEncryptCtr() — Encrypt a text using AES encryption in Counter mode of operation - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf