sodium_crypto_core_ristretto255_is_valid_point
PHP function
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(PHP 8 >= 8.1.0)
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.
Func
Parameters
sAn Elliptic-curve point.
Return Values
Returns true if s is on the ristretto255 curve, false otherwise.
Examples
sodium_crypto_core_ristretto255_is_valid_point() example
php
<?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:
output
bool(true)