/// <summary>
/// 对比版本包中的文件emd5值是否完全与指定文件夹中对应文件相同，鉴别是否中途遭恶意更改
/// </summary>
/// <param name="localFolderPath"></param>
/// <param name="romotePackageVersionInfo"></param>
/// <returns></returns>
public bool Verify(PackageVersionInfo romotePackageVersionInfo, string localFolderPath)
{
CspParameters param = new CspParameters();
param.KeyContainerName = SecretKey;
DirectoryInfo directoryInfo = new DirectoryInfo(localFolderPath + "/");
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
{
using (MD5 md5 = new MD5CryptoServiceProvider())
{
foreach (var item in romotePackageVersionInfo.Files)
{
string filePath = System.IO.Path.Combine(directoryInfo.FullName, item.File.TrimStart('\\', '/'));
FileInfo fileInfo = new FileInfo(filePath);
if (!File.Exists(filePath))
{
return(false);
}
string emd5Str = ComputeEmd5(fileInfo, md5, rsa);
if (emd5Str != item.Emd5)
{
return(false);
}
}
}
}
return(true);
}
/// <summary>
/// 对比本地文件与远程文件的版本信息，得出需要升级的所有文件版本信息
/// </summary>
/// <param name="localFolderPath"></param>
/// <param name="romotePackageVersionInfo"></param>
/// <returns></returns>
public PackageVersionInfo CompareDifference(string localFolderPath, PackageVersionInfo romotePackageVersionInfo)
{
long totalLength = 0;
List <FileVersionInfo> files = new List <FileVersionInfo>();
CspParameters param = new CspParameters();
param.KeyContainerName = SecretKey;
DirectoryInfo directoryInfo = new DirectoryInfo(localFolderPath + "/");
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
{
using (MD5 md5 = new MD5CryptoServiceProvider())
{
foreach (var item in romotePackageVersionInfo.Files)
{
string filePath = System.IO.Path.Combine(directoryInfo.FullName, item.File.TrimStart('\\', '/'));
FileInfo fileInfo = new FileInfo(filePath);
if (File.Exists(filePath))
{
string emd5Str = ComputeEmd5(fileInfo, md5, rsa);
if (emd5Str == item.Emd5)
{
continue;
}
}
files.Add(item);
totalLength += item.Length;
}
var diff = new PackageVersionInfo
{
Files = files.ToArray(),
TotalLength = totalLength,
PackageDate = romotePackageVersionInfo.PackageDate
};
return(diff);
}
}
}
