2009-02-10
key2_1 の定義
key2_1 = crc32 (key2_0, MSB(key1)); = crc32(key2_0,0) ^ crctab[MSB(key1)] key2_0 = (key2_1 << 8) ^ crcinvtab[MSB(key2_1)] ^ MSB(key1)