mcrypt_get_block_size
(PHP 4, PHP 5)
mcrypt_get_block_size — Gets the block size of the specified cipher
说明
int mcrypt_get_block_size ( int $cipher ) int mcrypt_get_block_size ( string $cipher , string $module )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
-
One of the MCRYPT_ciphername constants or the name of the algorithm as string.
- module
-
The module.
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_get_key_size() - Gets the key size of the specified cipher
- mcrypt_enc_get_block_size() - Returns the blocksize of the opened algorithm
- mcrypt_encrypt() - Encrypts plaintext with given parameters
