ParagonIE_Sodium_Core32_X25519

10abstract class ParagonIE_Sodium_Core32_X25519 extends ParagonIE_Sodium_Core32_Curve2551911{12    /**13     * Alters the objects passed to this method in place.14     *15     * @internal You should not use this directly from another application16     *17     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $f18     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $g19     * @param int $b20     * @return void21     * @throws SodiumException22     * @throws TypeError23     * @psalm-suppress MixedMethodCall24     */25    public static function fe_cswap(26        ParagonIE_Sodium_Core32_Curve25519_Fe $f,27        ParagonIE_Sodium_Core32_Curve25519_Fe $g,28        $b = 029    ) {30        $f0 = (int) $f[0]->toInt();31        $f1 = (int) $f[1]->toInt();32        $f2 = (int) $f[2]->toInt();33        $f3 = (int) $f[3]->toInt();34        $f4 = (int) $f[4]->toInt();35        $f5 = (int) $f[5]->toInt();36        $f6 = (int) $f[6]->toInt();37        $f7 = (int) $f[7]->toInt();38        $f8 = (int) $f[8]->toInt();39        $f9 = (int) $f[9]->toInt();40        $g0 = (int) $g[0]->toInt();41        $g1 = (int) $g[1]->toInt();42        $g2 = (int) $g[2]->toInt();43        $g3 = (int) $g[3]->toInt();44        $g4 = (int) $g[4]->toInt();45        $g5 = (int) $g[5]->toInt();46        $g6 = (int) $g[6]->toInt();47        $g7 = (int) $g[7]->toInt();48        $g8 = (int) $g[8]->toInt();49        $g9 = (int) $g[9]->toInt();50        $b = -$b;51        /** @var int $x0 */52        $x0 = ($f0 ^ $g0) & $b;53        /** @var int $x1 */54        $x1 = ($f1 ^ $g1) & $b;55        /** @var int $x2 */56        $x2 = ($f2 ^ $g2) & $b;57        /** @var int $x3 */58        $x3 = ($f3 ^ $g3) & $b;59        /** @var int $x4 */60        $x4 = ($f4 ^ $g4) & $b;61        /** @var int $x5 */62        $x5 = ($f5 ^ $g5) & $b;63        /** @var int $x6 */64        $x6 = ($f6 ^ $g6) & $b;65        /** @var int $x7 */66        $x7 = ($f7 ^ $g7) & $b;67        /** @var int $x8 */68        $x8 = ($f8 ^ $g8) & $b;69        /** @var int $x9 */70        $x9 = ($f9 ^ $g9) & $b;71        $f[0] = ParagonIE_Sodium_Core32_Int32::fromInt($f0 ^ $x0);72        $f[1] = ParagonIE_Sodium_Core32_Int32::fromInt($f1 ^ $x1);73        $f[2] = ParagonIE_Sodium_Core32_Int32::fromInt($f2 ^ $x2);74        $f[3] = ParagonIE_Sodium_Core32_Int32::fromInt($f3 ^ $x3);75        $f[4] = ParagonIE_Sodium_Core32_Int32::fromInt($f4 ^ $x4);76        $f[5] = ParagonIE_Sodium_Core32_Int32::fromInt($f5 ^ $x5);77        $f[6] = ParagonIE_Sodium_Core32_Int32::fromInt($f6 ^ $x6);78        $f[7] = ParagonIE_Sodium_Core32_Int32::fromInt($f7 ^ $x7);79        $f[8] = ParagonIE_Sodium_Core32_Int32::fromInt($f8 ^ $x8);80        $f[9] = ParagonIE_Sodium_Core32_Int32::fromInt($f9 ^ $x9);81        $g[0] = ParagonIE_Sodium_Core32_Int32::fromInt($g0 ^ $x0);82        $g[1] = ParagonIE_Sodium_Core32_Int32::fromInt($g1 ^ $x1);83        $g[2] = ParagonIE_Sodium_Core32_Int32::fromInt($g2 ^ $x2);84        $g[3] = ParagonIE_Sodium_Core32_Int32::fromInt($g3 ^ $x3);85        $g[4] = ParagonIE_Sodium_Core32_Int32::fromInt($g4 ^ $x4);86        $g[5] = ParagonIE_Sodium_Core32_Int32::fromInt($g5 ^ $x5);87        $g[6] = ParagonIE_Sodium_Core32_Int32::fromInt($g6 ^ $x6);88        $g[7] = ParagonIE_Sodium_Core32_Int32::fromInt($g7 ^ $x7);89        $g[8] = ParagonIE_Sodium_Core32_Int32::fromInt($g8 ^ $x8);