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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

Description

sodium_crypto_core_ristretto255_is_valid_point(string $s): bool

Determines 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.

Warning

This function is currently not documented; only its argument list is available.

Parameters

s

An Elliptic-curve point.

Return Values

Returns true if s is on the ristretto255 curve, false otherwise.

Examples

Example #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));
?>

The above example will output:

bool(true)

See Also

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.sodium-crypto-core-ristretto255-is-valid-point.php