mcrypt_get_key_size

(PHP 4, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_get_key_size — ��ȡָ��㷨��Կ��С

Warning

This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

mcrypt_get_key_size ( int $cipher ) : int

mcrypt_get_key_size ( string $cipher , string $mode ) : int

��һ��ԭ�� libmcrypt 2.2.x �ģ� �ڶ��ԭ�� libmcrypt 2.4.x �� 2.5.x �ġ�

mcrypt_get_key_size() ��ȡ �� cipher ��ָ��㷨��ģʽ��Կ��ȡ�

mcrypt_enc_get_key_size() ��ã� ��Ϊ��ʹ�� mcrypt_module_open() ��ص��Դ��

cipher: MCRYPT_ciphername ��е�һ��ַ��ֵ��㷨��ơ�
mode: MCRYPT_MODE_modename ��е�һ��ַ��е�һ��"ecb"��"cbc"��"cfb"��"ofb"��"nofb" �� "stream"��

��㷨��֧�ֵ��Կ��С��ֽ�Ϊ��λ�� ʧ��ʱ�� FALSE��

Example #1 mcrypt_get_key_size() ��


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

�� libmcrypt 2.4.x �� 2.5.x �汾�У� ��ʹ�ñ��

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