You should explain that the block size is return in BYTES, not the more commonly used unit, bits. Many readers are not going to know the DES block size and figure this out on their own.
mcrypt_get_block_size
(PHP 4, PHP 5)
mcrypt_get_block_size — Gets the block size of the specified cipher
說明
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().
參數
-
cipher -
MCRYPT_ciphername常數中的一個，或者是字串值的演算法名稱。 -
mode -
MCRYPT_MODE_modename常數中的一個，或以下字串中的一個："ecb"，"cbc"，"cfb"，"ofb"，"nofb" 和 "stream"。
回傳值
Gets the block size, as an integer.
範例
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
?>
參見
- 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
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User Contributed Notes 1 note
mehaase at gmail dot com ¶
9 years ago
