(PHP 5 >= PHP 5.3.3, PHP 7) Gets the cipher iv length

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Opens the module of the algorithm and the mode to be used

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Pump data into an active hashing context from a file

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

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

(PHP 5 >= 5.3.11, PHP 7) Computes shared secret for public value of remote DH key and local DH key

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Exports a CSR as a string

(PHP 5 >= 5.5.0, PHP 7) Returns information about the given hash

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

(PHP 5 >= 5.5.0, PHP 7) Generate a PBKDF2 key derivation of a supplied password