(PHP 7) Generates cryptographically secure pseudo-random bytes

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Encrypts data with public key

(PHP 4, PHP 5, PHP 7) Gets the block size of the specified cipher

(PHP 4, PHP 5, PHP 7) Gets the name of the specified hash

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Parse an X.509 certificate and return a resource identifier for it

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Free certificate resource

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

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Exports a certificate to file

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the size of the IV of the opened algorithm

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