mcrypt_module_get_supported_key_sizes
(PHP 4 >= 4.0.2, PHP 5)
mcrypt_module_get_supported_key_sizes — Returns an array with the supported keysizes of the opened algorithm
Description
array mcrypt_module_get_supported_key_sizes
( string $algorithm
[, string $lib_dir
] )
Returns an array with the key sizes supported by the specified algorithm. If it returns an empty array then all key sizes between 1 and mcrypt_module_get_algo_key_size() are supported by the algorithm. The optional lib_dir parameter can contain the location where the mode module is on the system.
See also mcrypt_enc_get_supported_key_sizes() which is used on open encryption modules.