public void changePass(string strNewPass)
{
Byte[] keya = new Byte[6] {
0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe
};
Byte[] ctrlbyte = new Byte[4] {
0xff, 0x7, 0x80, 0x69
};
Byte[] keyb = new Byte[6] {
0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe
};
Byte[] bNewPassHex = passToHex(strNewPass);
int sauth = E7Lib.fw_authentication(iDevice, 0, sectorNumber);
//fw_change3
int state = E7Lib.fw_changeb3(iDevice, sectorNumber, ref keya[0], ref ctrlbyte[0], 0, ref keyb[0]);
}