mcrypt_module_get_supported_key

(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.

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Daniel Bartlett <dan at lockedbox dot net>
12-Feb-2004 02:50


A small bit of php for listing available encryption algorythms and their keysizes.



<?php

$cipher_dir = "/usr/local/lib/libmcrypt";

$algorithms = mcrypt_list_algorithms($cipher_dir);

echo "<html><head></head><body><table><tr>\n";

foreach ($algorithms as $cipher) {

        echo "<td>" . $cipher . "</td><td>";

        $ksizes = mcrypt_module_get_supported_key_sizes($cipher, $cipher_dir);

        if($ksizes==NULL) echo mcrypt_module_get_algo_key_size($cipher, $cipher_dir);

        else foreach ($ksizes as $size) {

                echo $size . " ";

        }

        echo "</td></tr>\n";

}

echo "</table></body></html>\n";

?>



I hope some one finds it handy.

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