/// <summary>
/// 判断升级文件的合法性
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
public static bool JudgeLegitimacyOfUpgradeFile(byte[] buffer)
{
bool result = false;
if (buffer != null && buffer.Length > 0)
{
//add by masu 2016年3月2日15:33:10 判断下发固件升级文件是否正确
//获取升级文件中魔术数字
int magicWord = ConvertUtility.ConvertToInt32(new byte[] { buffer[3], buffer[2], buffer[1], buffer[0] }, 0);
//获取升级的版本号
UpdateVer.u8Main = buffer[4];
UpdateVer.u8Sub = buffer[5];
UpdateVer.u8Rev = buffer[6];
UpdateVer.u8Build = buffer[7];
//获取升级文件中包数大小
UpdateTotalNum = ConvertUtility.ConvertToInt16(new byte[] { buffer[13], buffer[12] }, 0);
//获取固件大小
int fwSize = ConvertUtility.ConvertToInt32(new byte[] { buffer[11], buffer[10], buffer[9], buffer[8] }, 0);
//获取升级文件中单包数据大小
int singlePacketSize = Convert.ToInt32(buffer[14]);
//获取总包个数
int dataTotalCount = (buffer.Length - 19) / singlePacketSize;
//获取真实总包数目的余数
int dataTotalCountRemainder = (buffer.Length - 19) % singlePacketSize;
if (dataTotalCountRemainder > 0)
{
dataTotalCount += 1;
}
if (dataTotalCount == UpdateTotalNum && (buffer.Length - 19) == fwSize)
{
result = true;
}
else
{
result = false;
}
}
return(result);
}