ParagonIE_Sodium_Core_SipHash

12class ParagonIE_Sodium_Core_SipHash extends ParagonIE_Sodium_Core_Util13{14    /**15     * @internal You should not use this directly from another application16     *17     * @param int[] $v18     * @return int[]19     *20     */21    public static function sipRound(array $v)22    {23        # v0 += v1;24        list($v[0], $v[1]) = self::add(25            array($v[0], $v[1]),26            array($v[2], $v[3])27        );28 29        #  v1=ROTL(v1,13);30        list($v[2], $v[3]) = self::rotl_64((int) $v[2], (int) $v[3], 13);31 32        #  v1 ^= v0;33        $v[2] = (int) $v[2] ^ (int) $v[0];34        $v[3] = (int) $v[3] ^ (int) $v[1];35 36        #  v0=ROTL(v0,32);37        list($v[0], $v[1]) = self::rotl_64((int) $v[0], (int) $v[1], 32);38 39        # v2 += v3;40        list($v[4], $v[5]) = self::add(41            array((int) $v[4], (int) $v[5]),42            array((int) $v[6], (int) $v[7])43        );44 45        # v3=ROTL(v3,16);46        list($v[6], $v[7]) = self::rotl_64((int) $v[6], (int) $v[7], 16);47 48        #  v3 ^= v2;49        $v[6] = (int) $v[6] ^ (int) $v[4];50        $v[7] = (int) $v[7] ^ (int) $v[5];51 52        # v0 += v3;53        list($v[0], $v[1]) = self::add(54            array((int) $v[0], (int) $v[1]),55            array((int) $v[6], (int) $v[7])56        );57 58        # v3=ROTL(v3,21);59        list($v[6], $v[7]) = self::rotl_64((int) $v[6], (int) $v[7], 21);60 61        # v3 ^= v0;62        $v[6] = (int) $v[6] ^ (int) $v[0];63        $v[7] = (int) $v[7] ^ (int) $v[1];64 65        # v2 += v1;66        list($v[4], $v[5]) = self::add(67            array((int) $v[4], (int) $v[5]),68            array((int) $v[2], (int) $v[3])69        );70 71        # v1=ROTL(v1,17);72        list($v[2], $v[3]) = self::rotl_64((int) $v[2], (int) $v[3], 17);73 74        #  v1 ^= v2;;75        $v[2] = (int) $v[2] ^ (int) $v[4];76        $v[3] = (int) $v[3] ^ (int) $v[5];77 78        # v2=ROTL(v2,32)79        list($v[4], $v[5]) = self::rotl_64((int) $v[4], (int) $v[5], 32);80 81        return $v;82    }83 84    /**85     * Add two 32 bit integers representing a 64-bit integer.86     *87     * @internal You should not use this directly from another application88     *89     * @param int[] $a90     * @param int[] $b91     * @return array<int, mixed>