sodium_crypto_core_ristretto255_scalar_sub
Subtracts a scalar value
Description
string sodium_crypto_core_ristretto255_scalar_sub(string $x, string $y)
Subtracts a scalar y from x.
Available as of libsodium 1.0.18.
WarningThis function is
currently not documented; only its argument list is available.
Parameters
-
x
-
Scalar, representing the X coordinate.
-
y
-
Scalar, representing the Y coordinate.
Return Values
Returns a 32-byte random string.
Examples
Example #1 sodium_crypto_core_ristretto255_scalar_sub example
<?php
$foo = sodium_crypto_core_ristretto255_scalar_random();
$bar = sodium_crypto_core_ristretto255_scalar_random();
$value = sodium_crypto_core_ristretto255_scalar_add($foo, $bar);
$value = sodium_crypto_core_ristretto255_scalar_sub($value, $bar);
var_dump(hash_equals($foo, $value));
?>
The above example will output:
See Also
- sodium_crypto_core_ristretto255_scalar_random
- sodium_crypto_core_ristretto255_scalar_add