sodium_crypto_core_ristretto255_sub
(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_sub — Subtracts an element
Description
sodium_crypto_core_ristretto255_sub(string
$p, string $q): string
Subtracts an element q from p.
Available as of libsodium 1.0.18.
Warning
This function is currently not documented; only its argument list is available.
Parameters
-
p -
An element.
-
q -
An element.
Return Values
Returns a 32-byte random string.
Examples
Example #1 sodium_crypto_core_ristretto255_sub() example
<?php
$foo = sodium_crypto_core_ristretto255_random();
$bar = sodium_crypto_core_ristretto255_random();
$value = sodium_crypto_core_ristretto255_add($foo, $bar);
$value = sodium_crypto_core_ristretto255_sub($value, $bar);
var_dump(hash_equals($foo, $value));
?>
The above example will output:
bool(true)
See Also
- sodium_crypto_core_ristretto255_random() - Generates a random key
- sodium_crypto_core_ristretto255_add() - Adds an element
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