const u8 iv[64]={0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08,0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b,0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b,