(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_scalar_invert — Inverts a scalar value
$s): stringInverts a scalar value. Available as of libsodium 1.0.18.
This function is currently not documented; only its argument list is available.
sScalar value.
Returns a 32-byte random string.
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)