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sodium_crypto_core_ristretto255_scalar_sub

(PHP 8 >= 8.1.0)

sodium_crypto_core_ristretto255_scalar_subSubtracts 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.

示例

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));
?>

以上示例会输出:

bool(true)

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