Mcrypt 函数
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mcrypt_get_block_size

(PHP 4, PHP 5)

mcrypt_get_block_sizeGets the block size of the specified cipher

说明

int mcrypt_get_block_size ( int $cipher )
int mcrypt_get_block_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.

mcrypt_get_block_size() is used to get the size of a block of the specified cipher (in combination with an encryption mode).

It is more useful to use the mcrypt_enc_get_block_size() function as this uses the resource returned by mcrypt_module_open().

参数

cipher

MCRYPT_ciphername 常量中的一个,或者是字符串值的算法名称。

mode

MCRYPT_MODE_modename 常量中的一个,或以下字符串中的一个:"ecb","cbc","cfb","ofb","nofb" 和 "stream"。

返回值

Gets the block size, as an integer.

范例

Example #1 mcrypt_get_block_size() example

This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x.

<?php

echo mcrypt_get_block_size('tripledes''ecb'); // 8

?>

参见


Mcrypt 函数
在线手册:中文  英文
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