C# 利用ICSharpCode.SharpZipLib实现在线加密压缩和解密解压缩
这里我们选用ICSharpCode.SharpZipLib这个类库来实现我们的需求。
下载地址：http://icsharpcode.github.io/SharpZipLib/
1.单个或多个文件加密压缩
class ZipClass
{
public void ZipFile(string FileToZip, string ZipedFile, int CompressionLevel, int BlockSize)
{
if (!System.IO.File.Exists(FileToZip))
{
throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd");
}
System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read);
System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
ZipEntry ZipEntry = new ZipEntry("ZippedFile");
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(CompressionLevel);
byte[] buffer = new byte[BlockSize];
System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, size);
try
{
while (size < StreamToZip.Length)
{
int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, sizeRead);
size += sizeRead;
}
}
catch (System.Exception ex)
{
throw ex;
}
ZipStream.Finish();
ZipStream.Close();
StreamToZip.Close();
}
/// <summary>
/// 文件加密压缩
/// </summary>
/// <param name="FileToZip">需要压缩的文件路径</param>
/// <param name="ZipedFile">压缩包路径（压缩包文件类型看自己需求）</param>
/// <param name="password">加密密码</param>
public void ZipFileMain(string FileToZip, string ZipedFile, string password)
{
ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
s.SetLevel(6); // 0 - store only to 9 - means best compression
s.Password = md5.encrypt(password);
//打开压缩文件
FileStream fs = File.OpenRead(FileToZip);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
Array arr = FileToZip.Split('\\');
string le = arr.GetValue(arr.Length - 1).ToString();
ZipEntry entry = new ZipEntry(le);
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
s.Finish();
s.Close();
}
}
2.单个或多个加密压缩包解压
1 class UnZipClass
2 {
3 public void UnZip(string directoryName, string ZipedFile, string password)
4 {
5 using (FileStream fileStreamIn = new FileStream(ZipedFile, FileMode.Open, FileAccess.Read))
6 {
7 using (ZipInputStream zipInStream = new ZipInputStream(fileStreamIn))
8 {
9 zipInStream.Password = md5.encrypt(password);
10 ZipEntry entry = zipInStream.GetNextEntry();
11 WebContext.SqlfilePath =directoryName+"\\"+ entry.Name;
12 do
13 {
14 using (FileStream fileStreamOut = new FileStream(directoryName + @"\" + entry.Name, FileMode.Create, FileAccess.Write))
15 {
16
17 int size = 2048;
18 byte[] buffer = new byte[2048];
19 do
20 {
21 size = zipInStream.Read(buffer, 0, buffer.Length);
22 fileStreamOut.Write(buffer, 0, size);
23 } while (size > 0);
24 }
25 } while ((entry = zipInStream.GetNextEntry()) != null);
26 }
27 }
28 }
29 }
3.Md5
1 class md5
2 {
3 #region "MD5加密"
4 /// <summary>
5 ///32位 MD5加密
6 /// </summary>
7 /// <param name="str">加密字符</param>
8 /// <returns></returns>
9 public static string encrypt(string str)
10 {
11 string cl = str;
12 string pwd = "";
13 MD5 md5 = MD5.Create();
14 byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
15 for (int i = 0; i < s.Length; i++)
16 {
17 pwd = pwd + s[i].ToString("X");
18 }
19 return pwd;
20 }
21 #endregion
22 }
C# 文件压缩加解密
1.这种方式也可以做到对文件的加密压缩，解密解压缩，只是在压缩和解压缩时会出现压缩窗口
1.1加密压缩
strzipPath：压缩包路径
strtxtPath：待压缩的文件路径
password:加密密码
public bool Zip(string strzipPath, string strtxtPath,string password)
{
try
{
System.Diagnostics.Process Process1 = new System.Diagnostics.Process();
Process1.StartInfo.FileName = "Winrar.exe";
Process1.StartInfo.CreateNoWindow = true;
Process1.StartInfo.Arguments = " a -p" + password + " " + strzipPath + " " + strtxtPath;
//strtxtPath = "c://freezip//";
//Process1.StartInfo.Arguments = " x -p123456 " + strzipPath + " " + strtxtPath;
Process1.Start();
if (Process1.HasExited)
{
return true;
}
return true;
}
catch (Exception)
{
return false;
}
}
1.2解密解压
1 public bool UZip(string strzipPath, string strtxtPath,string password)
2 {
3 try
4 {
5 System.Diagnostics.Process Process1 = new System.Diagnostics.Process();
6 Process1.StartInfo.FileName = "Winrar.exe";
7 Process1.StartInfo.CreateNoWindow = true;
8 //Process1.StartInfo.Arguments = " a -p123456 " + strzipPath + " " + strtxtPath;
9 //strtxtPath = "c://freezip//";
10 Process1.StartInfo.Arguments = " x -p" + password + " " + strzipPath + " " + strtxtPath;
11 Process1.Start();
12 if (Process1.HasExited)
13 {
14 return true;
15 }
16 return true;
17 }
18 catch (Exception)
19 {
20
21 return false;
22 }
23
24 }