sodium_crypto_secretbox_keygen

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_secretbox_keygen — Generate random key for sodium_crypto_secretbox

说明

sodium_crypto_secretbox_keygen(): string

Generate a key for use with sodium_crypto_secretbox() and sodium_crypto_secretbox_open().

参数

此函数没有参数。

返回值

Returns the generated string of cryptographically secure random bytes.

示例

示例 #1 sodium_crypto_secretbox_keygen() example

<?php
$key = sodium_crypto_secretbox_keygen();
var_dump( sodium_bin2hex( $key ) );
?>

以上示例的输出类似于：

string(64) "88bd1dc51ec81984f3ddc5a8f59a3d95b647e2da3e879f1b9ceb0abd89e7286c"

示例 #2 Comparing sodium_crypto_secretbox_keygen() with random_bytes()

<?php
$key = sodium_crypto_secretbox_keygen();
$bytes = random_bytes( SODIUM_CRYPTO_SECRETBOX_KEYBYTES );
var_dump( mb_strlen( $key, '8bit' ) === mb_strlen( $bytes, '8bit' ) );
?>

以上示例会输出：

bool(true)

参见