ParagonIE_Sodium_Core_Curve25519::fe_cmov() public WP 1.0
Constant-time conditional move.
{} It's a method of the class: ParagonIE_Sodium_Core_Curve25519{}
No Hooks.
Return
ParagonIE_Sodium_Core_Curve25519_Fe
. Null. Nothing.
Usage
$result = ParagonIE_Sodium_Core_Curve25519::fe_cmov(;
Code of ParagonIE_Sodium_Core_Curve25519::fe_cmov() ParagonIE Sodium Core Curve25519::fe cmov WP 5.7
public static function fe_cmov(
ParagonIE_Sodium_Core_Curve25519_Fe $f,
ParagonIE_Sodium_Core_Curve25519_Fe $g,
$b = 0
) {
/** @var array<int, int> $h */
$h = array();
$b *= -1;
for ($i = 0; $i < 10; ++$i) {
/** @var int $x */
$x = (($f[$i] ^ $g[$i]) & $b);
$h[$i] = (int) ((int) ($f[$i]) ^ $x);
}
return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray($h);
}