sodium_crypto_core_ristretto255_scalar_sub
(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_scalar_sub — Subtracts a scalar value
说明
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)
参见
- sodium_crypto_core_ristretto255_scalar_random() - Generates a random key
- sodium_crypto_core_ristretto255_scalar_add() - Adds a scalar value
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