mcrypt_module_get_algo_key_size

(PHP4 >= 4.0.2)

mcrypt_module_get_algo_key_size -- Returns the maximum supported keysize of the opened mode

Description

int mcrypt_module_get_algo_key_size (string algorithm [, string lib_dir])

This function returns the maximum supported key size of the algorithm specified in bytes. The optional lib_dir parameter can contain the location where the mode module is on the system.