(PHP 5 >= 5.5.0, PHP 7) Generates a PKCS5 v2 PBKDF2 string, defaults to SHA-1

(PHP 5 >= 5.2.0, PHP 7) Returns the subject of a CERT

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Seal (encrypt) data

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns if the specified module is a block algorithm or not

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Decrypts data

(PHP 5 >= 5.3.0, PHP 7) Encrypts data string

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the blocksize of the specified algorithm

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Sign an S/MIME message

(PHP 5 >= 5.3.0, PHP 7) Gets available digest methods

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