mcrypt_get_block_size
(PHP 4, PHP 5, PHP 7)
mcrypt_get_block_size — Gets the block size of the specified cipher
Описание
$cipher
)$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().
Список параметров
-
cipher -
Одна из констант
MCRYPT_ciphernameили название алгоритма в виде строки. -
mode -
Одна из констант
MCRYPT_MODE_modename, либо одна из следующих строк: "ecb", "cbc", "cfb", "ofb", "nofb" и "stream".
Возвращаемые значения
Gets the block size, as an integer.
Примеры
Пример #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
?>
Смотрите также
- 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
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Криптографические расширения
- Mcrypt
- mcrypt_cbc
- mcrypt_cfb
- mcrypt_create_iv
- mcrypt_decrypt
- mcrypt_ecb
- mcrypt_enc_get_algorithms_name
- mcrypt_enc_get_block_size
- mcrypt_enc_get_iv_size
- mcrypt_enc_get_key_size
- mcrypt_enc_get_modes_name
- mcrypt_enc_get_supported_key_sizes
- mcrypt_enc_is_block_algorithm_mode
- mcrypt_enc_is_block_algorithm
- mcrypt_enc_is_block_mode
- mcrypt_enc_self_test
- mcrypt_encrypt
- mcrypt_generic_deinit
- mcrypt_generic_end
- mcrypt_generic_init
- mcrypt_generic
- mcrypt_get_block_size
- mcrypt_get_cipher_name
- mcrypt_get_iv_size
- mcrypt_get_key_size
- mcrypt_list_algorithms
- mcrypt_list_modes
- mcrypt_module_close
- mcrypt_module_get_algo_block_size
- mcrypt_module_get_algo_key_size
- mcrypt_module_get_supported_key_sizes
- mcrypt_module_is_block_algorithm_mode
- mcrypt_module_is_block_algorithm
- mcrypt_module_is_block_mode
- mcrypt_module_open
- mcrypt_module_self_test
- mcrypt_ofb
- mdecrypt_generic
Коментарии
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.