生成MachineKey

<machineKey decryptionKey="EE637029BA3242287BAEFA612AB8FE76D915685E93CABC26" validationKey="ED865B4893CA0C2F7B152E74823843D3D4AAEFC861D153323A6BD9A4541D026F655811D74143BCB2404B5F4FD1A14522B4C6EE2DBC5EDD2B0CF849BE9B5782C2" validation="SHA1" />