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

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

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a hash value using the contents of a given file

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

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Return a list of registered hashing algorithms

(PHP 5 >= 5.5.0, PHP 7) Checks if the given hash matches the given options

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Free key resource

(PHP 5 >= 5.3.0, PHP 7) Copy hashing context

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a hash value (message digest)

(PHP 4 >= 4.0.2, PHP 5, PHP 7) This function initializes all buffers needed for encryption