Sodium Functions
PHP Manual

sodium_crypto_core_ristretto255_is_valid_point

Determines if a point on the ristretto255 curve

Description

bool sodium_crypto_core_ristretto255_is_valid_point(string $s)

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

  • sodium_crypto_core_ristretto255_scalar_random
  • sodium_crypto_scalarmult_ristretto255_base