sodium_crypto_core_ristretto255_is_valid_point
(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_is_valid_point — Determines if a point on the ristretto255 curve
说明
sodium_crypto_core_ristretto255_is_valid_point(string
$s): boolDetermines if a point on the ristretto255 curve, in canonical form, on the main subgroup, and that the point doesn't have a small order. 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
-
s -
An Elliptic-curve point.
返回值
Returns true if s is on the ristretto255 curve, false otherwise.
范例
示例 #1 sodium_crypto_core_ristretto255_is_valid_point() example
<?php
$foo = sodium_crypto_core_ristretto255_scalar_random();
$bar = sodium_crypto_scalarmult_ristretto255_base($foo);
var_dump(sodium_crypto_core_ristretto255_is_valid_point($bar));
?>
以上例程会输出：
bool(true)
参见
- sodium_crypto_core_ristretto255_scalar_random() - Generates a random key
- sodium_crypto_scalarmult_ristretto255_base() - Calculates the public key from a secret key
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备份地址：http://www.lvesu.com/blog/php/function.sodium-crypto-core-ristretto255-is-valid-point.php