(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Initialize an incremental hashing context

(PHP 5 >= 5.2.2, PHP 7) Exports a PKCS#12 Compatible Certificate Store File to variable.

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Parse an X509 certificate and return the information as an array

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

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

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

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

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

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Gets an array of all supported ciphers

(PHP 5 >= 5.6.0, PHP 7) Timing attack safe string comparison