mcrypt_get_key_size

Gets the key size of the specified cipher

 **mcrypt_get_key_size** int $cipher

 **mcrypt_get_key_size** string $cipher string $mode

The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x or 2.5.x.

is used to get the size

of a key of the specified (in combination with an encryption mode). mcrypt_get_key_size``cipher

It is more useful to use the function as this uses the resource returned by . mcrypt_enc_get_key_size``mcrypt_module_open

cipher``modeReturns the maximum supported key size of the algorithm in bytes return.falseforfailure.

Voorbeeld: Example

<?php
    echo mcrypt_get_key_size('tripledes', 'ecb');
?>

The example above shows how to use this function when linked against libmcrypt 2.4.x or 2.5.x.

mcrypt_get_block_size``mcrypt_enc_get_key_size``mcrypt_encrypt

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