sodium_crypto_core_ristretto255_scalar_sub
(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_scalar_sub — Subtracts a scalar value
说明
sodium_crypto_core_ristretto255_scalar_sub(string
$x, string $y): string Subtracts a scalar y from x. Available as of libsodium 1.0.18.
警告
本函数还未编写文档，仅有参数列表。
参数
-
x -
Scalar, representing the X coordinate.
-
y -
Scalar, representing the Y coordinate.
返回值
Returns a 32-byte random string.
范例
示例 #1 sodium_crypto_core_ristretto255_scalar_sub() example
<?php
$foo
= sodium_crypto_core_ristretto255_scalar_random();
$bar = sodium_crypto_core_ristretto255_scalar_random();
$value = sodium_crypto_core_ristretto255_scalar_add($foo, $bar);
$value = sodium_crypto_core_ristretto255_scalar_sub($value, $bar);
var_dump(hash_equals($foo, $value));
?> 以上例程会输出：
bool(true)
参见
- sodium_crypto_core_ristretto255_scalar_random() – Generates a random key
- sodium_crypto_core_ristretto255_scalar_add() – Adds a scalar value
用户贡献的笔记
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