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<sodium_crypto_core_ristretto255_scalar_complementsodium_crypto_core_ristretto255_scalar_mul>
^Sodium FunctionsLast updated: Mon, 26 Oct 2026

sodium_crypto_core_ristretto255_scalar_invert

(PHP 8 >= 8.1.0)

sodium_crypto_core_ristretto255_scalar_invert — Inverts a scalar value

Description

function sodium_crypto_core_ristretto255_scalar_invert(string $s): string

Inverts a scalar value. Available as of libsodium 1.0.18.

Warning

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

Parameters

s

Scalar value.

Return Values

Returns a 32-byte random string.

Examples

Example #1 sodium_crypto_core_ristretto255_scalar_invert() example

<?php

$foo = sodium_crypto_core_ristretto255_scalar_random();

$inverted = sodium_crypto_core_ristretto255_scalar_invert($foo);
$reInverted = sodium_crypto_core_ristretto255_scalar_invert($inverted);

var_dump(hash_equals($foo, $reInverted));
?>

The above example will output:

bool(true)

See Also


<sodium_crypto_core_ristretto255_scalar_complementsodium_crypto_core_ristretto255_scalar_mul>
^Sodium FunctionsLast updated: Mon, 26 Oct 2026