(PHP 4 >= 4.0.2, PHP 5, PHP 7) Checks whether the opened mode outputs blocks

(PHP 4 >= 4.0.7, PHP 5, PHP 7) This function deinitializes an encryption module

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Checks whether the algorithm of the opened mode is a block algorithm

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Runs a self test on the opened module

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the maximum supported keysize of the opened mode

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Decrypts crypttext with given parameters

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the name of the opened mode

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Checks whether the encryption of the opened mode works on blocks

(PHP 4, PHP 5) Encrypts/decrypts data in OFB mode

(PHP 4, PHP 5, PHP 7) Creates an initialization vector (IV) from a random source