文件加密，文件夾加密
代碼：
1、AES加密類
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using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Utils
{
/// <summary>
/// AES加密解密
/// </summary>
public class AES
{
#region 加密
#region 加密字符串
/// <summary>
/// AES 加密(高級加密標准，是下一代的加密算法標准，速度快，安全級別高，目前 AES 標准的一個實現是 Rijndael 算法)
/// </summary>
/// <param name="EncryptString">待加密密文</param>
/// <param name="EncryptKey">加密密鑰</param>
public static string AESEncrypt(string EncryptString, string EncryptKey)
{
return Convert.ToBase64String(AESEncrypt(Encoding.Default.GetBytes(EncryptString), EncryptKey));
}
#endregion
#region 加密字節數組
/// <summary>
/// AES 加密(高級加密標准，是下一代的加密算法標准，速度快，安全級別高，目前 AES 標准的一個實現是 Rijndael 算法)
/// </summary>
/// <param name="EncryptString">待加密密文</param>
/// <param name="EncryptKey">加密密鑰</param>
public static byte[] AESEncrypt(byte[] EncryptByte, string EncryptKey)
{
if (EncryptByte.Length == 0) { throw (new Exception("明文不得為空")); }
if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密鑰不得為空")); }
byte[] m_strEncrypt;
byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");
byte[] m_salt = Convert.FromBase64String("gsf4jvkyhye5/d7k8OrLgM==");
Rijndael m_AESProvider = Rijndael.Create();
try
{
MemoryStream m_stream = new MemoryStream();
PasswordDeriveBytes pdb = new PasswordDeriveBytes(EncryptKey, m_salt, "SHA256", 1000);
CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(pdb.GetBytes(32), m_btIV), CryptoStreamMode.Write);
m_csstream.Write(EncryptByte, 0, EncryptByte.Length); m_csstream.FlushFinalBlock();
m_strEncrypt = m_stream.ToArray();
m_stream.Close(); m_stream.Dispose();
m_csstream.Close(); m_csstream.Dispose();
}
catch (IOException ex) { throw ex; }
catch (CryptographicException ex) { throw ex; }
catch (ArgumentException ex) { throw ex; }
catch (Exception ex) { throw ex; }
finally { m_AESProvider.Clear(); }
return m_strEncrypt;
}
#endregion
#endregion
#region 解密
#region 解密字符串
/// <summary>
/// AES 解密(高級加密標准，是下一代的加密算法標准，速度快，安全級別高，目前 AES 標准的一個實現是 Rijndael 算法)
/// </summary>
/// <param name="DecryptString">待解密密文</param>
/// <param name="DecryptKey">解密密鑰</param>
public static string AESDecrypt(string DecryptString, string DecryptKey)
{
return Convert.ToBase64String(AESDecrypt(Encoding.Default.GetBytes(DecryptString), DecryptKey));
}
#endregion
#region 解密字節數組
/// <summary>
/// AES 解密(高級加密標准，是下一代的加密算法標准，速度快，安全級別高，目前 AES 標准的一個實現是 Rijndael 算法)
/// </summary>
/// <param name="DecryptString">待解密密文</param>
/// <param name="DecryptKey">解密密鑰</param>
public static byte[] AESDecrypt(byte[] DecryptByte, string DecryptKey)
{
if (DecryptByte.Length == 0) { throw (new Exception("密文不得為空")); }
if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得為空")); }
byte[] m_strDecrypt;
byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");
byte[] m_salt = Convert.FromBase64String("gsf4jvkyhye5/d7k8OrLgM==");
Rijndael m_AESProvider = Rijndael.Create();
try
{
MemoryStream m_stream = new MemoryStream();
PasswordDeriveBytes pdb = new PasswordDeriveBytes(DecryptKey, m_salt, "SHA256", 1000);
CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(pdb.GetBytes(32), m_btIV), CryptoStreamMode.Write);
m_csstream.Write(DecryptByte, 0, DecryptByte.Length); m_csstream.FlushFinalBlock();
m_strDecrypt = m_stream.ToArray();
m_stream.Close(); m_stream.Dispose();
m_csstream.Close(); m_csstream.Dispose();
}
catch (IOException ex) { throw ex; }
catch (CryptographicException ex) { throw ex; }
catch (ArgumentException ex) { throw ex; }
catch (Exception ex) { throw ex; }
finally { m_AESProvider.Clear(); }
return m_strDecrypt;
}
#endregion
#endregion
}
}
View Code
2、文件加密類
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using System.IO;
using System;
namespace Utils
{
/// <summary>
/// 文件加密類
/// </summary>
public class FileEncrypt
{
#region 變量
/// <summary>
/// 一次處理的明文字節數
/// </summary>
public static readonly int encryptSize = 10000000;
/// <summary>
/// 一次處理的密文字節數
/// </summary>
public static readonly int decryptSize = 10000016;
#endregion
#region 加密文件
/// <summary>
/// 加密文件
/// </summary>
public static void EncryptFile(string path, string pwd, RefreshFileProgress refreshFileProgress)
{
try
{
if (File.Exists(path + ".temp")) File.Delete(path + ".temp");
using (FileStream fsTemp = new FileStream(path + ".temp", FileMode.Create))
{
fsTemp.Close();
File.SetAttributes(path + ".temp", FileAttributes.Hidden);
}
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
if (fs.Length > 0)
{
int blockCount = ((int)fs.Length - 1) / encryptSize + 1;
for (int i = 0; i < blockCount; i++)
{
fs.Seek(i * encryptSize, SeekOrigin.Begin);
int size = encryptSize;
if (i == blockCount - 1) size = (int)(fs.Length - i * encryptSize);
byte[] bArr = new byte[size];
fs.Read(bArr, 0, size);
byte[] result = AES.AESEncrypt(bArr, pwd);
using (FileStream fsnew = new FileStream(path + ".temp", FileMode.Append, FileAccess.Write))
{
fsnew.Write(result, 0, result.Length);
fsnew.Flush();
fsnew.Close();
}
refreshFileProgress(blockCount, i + 1); //更新進度
}
fs.Close();
File.Delete(path);
File.Move(path + ".temp", path);
File.SetAttributes(path, FileAttributes.Archive);
}
}
}
catch (Exception ex)
{
File.Delete(path + ".temp");
throw ex;
}
}
#endregion
#region 解密文件
/// <summary>
/// 解密文件
/// </summary>
public static void DecryptFile(string path, string pwd, RefreshFileProgress refreshFileProgress)
{
try
{
if (File.Exists(path + ".temp")) File.Delete(path + ".temp");
using (FileStream fsTemp = new FileStream(path + ".temp", FileMode.Create))
{
fsTemp.Close();
File.SetAttributes(path + ".temp", FileAttributes.Hidden);
}
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
{
if (fs.Length > 0)
{
int blockCount = ((int)fs.Length - 1) / decryptSize + 1;
for (int i = 0; i < blockCount; i++)
{
fs.Seek(i * decryptSize, SeekOrigin.Begin);
int size = decryptSize;
if (i == blockCount - 1) size = (int)(fs.Length - i * decryptSize);
byte[] bArr = new byte[size];
fs.Read(bArr, 0, size);
byte[] result = AES.AESDecrypt(bArr, pwd);
using (FileStream fsnew = new FileStream(path + ".temp", FileMode.Append, FileAccess.Write))
{
fsnew.Write(result, 0, result.Length);
fsnew.Flush();
fsnew.Close();
}
refreshFileProgress(blockCount, i + 1); //更新進度
}
fs.Close();
File.Delete(path);
File.Move(path + ".temp", path);
File.SetAttributes(path, FileAttributes.Archive);
}
}
}
catch (Exception ex)
{
File.Delete(path + ".temp");
throw ex;
}
}
#endregion
}
/// <summary>
/// 更新文件加密進度
/// </summary>
public delegate void RefreshFileProgress(int max, int value);
}
View Code
3、文件夾加密類
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Utils;
namespace EncryptFile.Utils
{
/// <summary>
/// 文件夾加密類
/// </summary>
public class DirectoryEncrypt
{
#region 加密文件夾及其子文件夾中的所有文件
/// <summary>
/// 加密文件夾及其子文件夾中的所有文件
/// </summary>
public static void EncryptDirectory(string dirPath, string pwd, RefreshDirProgress refreshDirProgress, RefreshFileProgress refreshFileProgress)
{
string[] filePaths = Directory.GetFiles(dirPath, "*", SearchOption.AllDirectories);
for (int i = 0; i < filePaths.Length; i++)
{
FileEncrypt.EncryptFile(filePaths[i], pwd, refreshFileProgress);
refreshDirProgress(filePaths.Length, i + 1);
}
}
#endregion
#region 解密文件夾及其子文件夾中的所有文件
/// <summary>
/// 解密文件夾及其子文件夾中的所有文件
/// </summary>
public static void DecryptDirectory(string dirPath, string pwd, RefreshDirProgress refreshDirProgress, RefreshFileProgress refreshFileProgress)
{
string[] filePaths = Directory.GetFiles(dirPath, "*", SearchOption.AllDirectories);
for (int i = 0; i < filePaths.Length; i++)
{
FileEncrypt.DecryptFile(filePaths[i], pwd, refreshFileProgress);
refreshDirProgress(filePaths.Length, i + 1);
}
}
#endregion
}
/// <summary>
/// 更新文件夾加密進度
/// </summary>
public delegate void RefreshDirProgress(int max, int value);
}
View Code
4、跨線程訪問控制委托
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using System;
using System.Windows.Forms;
namespace Utils
{
/// <summary>
/// 跨線程訪問控件的委托
/// </summary>
public delegate void InvokeDelegate();
/// <summary>
/// 跨線程訪問控件類
/// </summary>
public class InvokeUtil
{
/// <summary>
/// 跨線程訪問控件
/// </summary>
/// <param name="ctrl">Form對象</param>
/// <param name="de">委托</param>
public static void Invoke(Control ctrl, Delegate de)
{
if (ctrl.IsHandleCreated)
{
ctrl.BeginInvoke(de);
}
}
}
}
View Code
5、Form1.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using Utils;
using System.Threading;
using EncryptFile.Utils;
namespace EncryptFile
{
public partial class Form1 : Form
{
#region 變量
/// <summary>
/// 一次處理的明文字節數
/// </summary>
public static int encryptSize = 10000000;
/// <summary>
/// 一次處理的密文字節數
/// </summary>
public static int decryptSize = 10000016;
#endregion
#region 構造函數
public Form1()
{
InitializeComponent();
}
#endregion
#region 加密文件
private void btnEncrypt_Click(object sender, EventArgs e)
{
#region 驗證
if (txtPwd.Text == "")
{
MessageBox.Show("密碼不能為空", "提示");
return;
}
if (txtPwdCfm.Text == "")
{
MessageBox.Show("確認密碼不能為空", "提示");
return;
}
if (txtPwdCfm.Text != txtPwd.Text)
{
MessageBox.Show("兩次輸入的密碼不相同", "提示");
return;
}
#endregion
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
Thread thread = new Thread(new ParameterizedThreadStart(delegate(object obj)
{
try
{
InvokeDelegate invokeDelegate = delegate()
{
pbFile.Value = 0;
lblProgressFile.Text = "0%";
pbDir.Visible = false;
lblProgressDir.Visible = false;
pbFile.Visible = false;
lblProgressFile.Visible = false;
lblShowPath.Text = "文件：" + openFileDialog1.FileName;
lblShowPath.Visible = true;
DisableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
DateTime t1 = DateTime.Now;
FileEncrypt.EncryptFile(openFileDialog1.FileName, txtPwd.Text, RefreshFileProgress);
DateTime t2 = DateTime.Now;
string t = t2.Subtract(t1).TotalSeconds.ToString("0.00");
if (MessageBox.Show("加密成功，耗時" + t + "秒", "提示") == DialogResult.OK)
{
invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
catch (Exception ex)
{
if (MessageBox.Show("加密失敗：" + ex.Message, "提示") == DialogResult.OK)
{
InvokeDelegate invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
}));
thread.Start();
}
}
#endregion
#region 解密文件
private void btnDecrypt_Click(object sender, EventArgs e)
{
#region 驗證
if (txtPwd.Text == "")
{
MessageBox.Show("密碼不能為空", "提示");
return;
}
#endregion
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
Thread thread = new Thread(new ParameterizedThreadStart(delegate(object obj)
{
try
{
InvokeDelegate invokeDelegate = delegate()
{
pbFile.Value = 0;
lblProgressFile.Text = "0%";
pbDir.Visible = false;
lblProgressDir.Visible = false;
pbFile.Visible = false;
lblProgressFile.Visible = false;
lblShowPath.Text = "文件：" + openFileDialog1.FileName;
lblShowPath.Visible = true;
DisableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
DateTime t1 = DateTime.Now;
FileEncrypt.DecryptFile(openFileDialog1.FileName, txtPwd.Text, RefreshFileProgress);
DateTime t2 = DateTime.Now;
string t = t2.Subtract(t1).TotalSeconds.ToString("0.00");
if (MessageBox.Show("解密成功，耗時" + t + "秒", "提示") == DialogResult.OK)
{
invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
catch (Exception ex)
{
if (MessageBox.Show("解密失敗：" + ex.Message, "提示") == DialogResult.OK)
{
InvokeDelegate invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
}));
thread.Start();
}
}
#endregion
#region 文件夾加密
private void btnEncryptDir_Click(object sender, EventArgs e)
{
#region 驗證
if (txtPwd.Text == "")
{
MessageBox.Show("密碼不能為空", "提示");
return;
}
if (txtPwdCfm.Text == "")
{
MessageBox.Show("確認密碼不能為空", "提示");
return;
}
if (txtPwdCfm.Text != txtPwd.Text)
{
MessageBox.Show("兩次輸入的密碼不相同", "提示");
return;
}
#endregion
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
if (MessageBox.Show(string.Format("確定加密文件夾{0}？", folderBrowserDialog1.SelectedPath),
"提示", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
{
return;
}
Thread thread = new Thread(new ParameterizedThreadStart(delegate(object obj)
{
try
{
InvokeDelegate invokeDelegate = delegate()
{
pbDir.Value = 0;
lblProgressDir.Text = "0%";
pbFile.Value = 0;
lblProgressFile.Text = "0%";
pbDir.Visible = true;
lblProgressDir.Visible = true;
pbFile.Visible = false;
lblProgressFile.Visible = false;
lblShowPath.Text = "文件夾：" + folderBrowserDialog1.SelectedPath;
lblShowPath.Visible = true;
DisableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
DateTime t1 = DateTime.Now;
DirectoryEncrypt.EncryptDirectory(folderBrowserDialog1.SelectedPath, txtPwd.Text, RefreshDirProgress, RefreshFileProgress);
DateTime t2 = DateTime.Now;
string t = t2.Subtract(t1).TotalSeconds.ToString("0.00");
if (MessageBox.Show("加密成功，耗時" + t + "秒", "提示") == DialogResult.OK)
{
invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
catch (Exception ex)
{
if (MessageBox.Show("加密失敗:" + ex.Message, "提示") == DialogResult.OK)
{
InvokeDelegate invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
}));
thread.Start();
}
}
#endregion
#region 文件夾解密
private void btnDecryptDir_Click(object sender, EventArgs e)
{
#region 驗證
if (txtPwd.Text == "")
{
MessageBox.Show("密碼不能為空", "提示");
return;
}
#endregion
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
if (MessageBox.Show(string.Format("確定解密文件夾{0}？", folderBrowserDialog1.SelectedPath),
"提示", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
{
return;
}
Thread thread = new Thread(new ParameterizedThreadStart(delegate(object obj)
{
try
{
InvokeDelegate invokeDelegate = delegate()
{
pbDir.Value = 0;
lblProgressDir.Text = "0%";
pbFile.Value = 0;
lblProgressFile.Text = "0%";
pbDir.Visible = true;
lblProgressFile.Visible = true;
pbFile.Visible = false;
lblProgressFile.Visible = false;
lblShowPath.Text = "文件夾：" + folderBrowserDialog1.SelectedPath;
lblShowPath.Visible = true;
DisableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
DateTime t1 = DateTime.Now;
DirectoryEncrypt.DecryptDirectory(folderBrowserDialog1.SelectedPath, txtPwd.Text, RefreshDirProgress, RefreshFileProgress);
DateTime t2 = DateTime.Now;
string t = t2.Subtract(t1).TotalSeconds.ToString("0.00");
if (MessageBox.Show("解密成功，耗時" + t + "秒", "提示") == DialogResult.OK)
{
invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
catch (Exception ex)
{
if (MessageBox.Show("解密失敗：" + ex.Message, "提示") == DialogResult.OK)
{
InvokeDelegate invokeDelegate = delegate()
{
EnableBtns();
};
InvokeUtil.Invoke(this, invokeDelegate);
}
}
}));
thread.Start();
}
}
#endregion
#region 更新文件加密進度
/// <summary>
/// 更新文件加密進度
/// </summary>
public void RefreshFileProgress(int max, int value)
{
InvokeDelegate invokeDelegate = delegate()
{
if (max > 1)
{
pbFile.Visible = true;
lblProgressFile.Visible = true;
}
else
{
pbFile.Visible = false;
lblProgressFile.Visible = false;
}
pbFile.Maximum = max;
pbFile.Value = value;
lblProgressFile.Text = value * 100 / max + "%";
};
InvokeUtil.Invoke(this, invokeDelegate);
}
#endregion
#region 更新文件夾加密進度
/// <summary>
/// 更新文件夾加密進度
/// </summary>
public void RefreshDirProgress(int max, int value)
{
InvokeDelegate invokeDelegate = delegate()
{
pbDir.Maximum = max;
pbDir.Value = value;
lblProgressDir.Text = value * 100 / max + "%";
};
InvokeUtil.Invoke(this, invokeDelegate);
}
#endregion
#region 顯示密碼
private void cbxShowPwd_CheckedChanged(object sender, EventArgs e)
{
if (cbxShowPwd.Checked)
{
txtPwd.PasswordChar = default(char);
txtPwdCfm.PasswordChar = default(char);
}
else
{
txtPwd.PasswordChar = '*';
txtPwdCfm.PasswordChar = '*';
}
}
#endregion
#region 關閉窗體事件
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (progressPanel.Visible)
{
MessageBox.Show("正在處理文件，請等待…", "提示");
e.Cancel = true;
}
}
#endregion
#region 控制按鈕狀態
/// <summary>
/// 禁用按鈕
/// </summary>
public void DisableBtns()
{
progressPanel.Visible = true;
btnEncrypt.Enabled = false;
btnDecrypt.Enabled = false;
btnEncryptDir.Enabled = false;
btnDecryptDir.Enabled = false;
}
/// <summary>
/// 啟用按鈕
/// </summary>
public void EnableBtns()
{
lblShowPath.Visible = false;
progressPanel.Visible = false;
btnEncrypt.Enabled = true;
btnDecrypt.Enabled = true;
btnEncryptDir.Enabled = true;
btnDecryptDir.Enabled = true;
}
#endregion
}
}
View Code
源碼：
源碼下載：下載地址
文件夾怎加密
一、加密文件或文件夾
步驟一：打開Windows資源管理器。
步驟二：右鍵單擊要加密的文件或文件夾，然後單擊“屬性”。
步驟三：在“常規”選項卡上，單擊“高級”。選中“加密內容以便保護數據”復選框
在加密過程中還要注意以下五點：
1.打開“Windows 資源管理器”，請單擊“開始→程序→附件”，然後單擊“Windows 資源管理器”。
2.只可以加密NTFS分區卷上的文件和文件夾，FAT分區卷上的文件和文件夾無效。
3.被壓縮的文件或文件夾也可加密。如要加密一個壓縮文件或文件夾，則該文件或文件夾將會被解壓。
4.無法加密標記為“系統”屬性的文件，並且位於systemroot目錄結構中的文件也無法加密。
5.在加密文件夾時，系統將詢問是否要同時加密它的子文件夾。如果選擇是，那它的子文件夾也會被加密，以後所有添加進文件夾中的文件和子文件夾都將在添加時自動加密。
二、解密文件或文件夾
步驟一：打開Windows資源管理器。
步驟二：右鍵單擊加密文件或文件夾，然後單擊“屬性”。
步驟三：在“常規”選項卡上，單擊“高級”。
步驟四：清除“加密內容以便保護數據”復選框。
文件夾怎加密
一、加密文件或文件夾
步驟一：打開Windows資源管理器。
步驟二：右鍵單擊要加密的文件或文件夾，然後單擊“屬性”。
步驟三：在“常規”選項卡上，單擊“高級”。選中“加密內容以便保護數據”復選框
在加密過程中還要注意以下五點：
1.打開“Windows 資源管理器”，請單擊“開始→程序→附件”，然後單擊“Windows 資源管理器”。
2.只可以加密NTFS分區卷上的文件和文件夾，FAT分區卷上的文件和文件夾無效。
3.被壓縮的文件或文件夾也可加密。如要加密一個壓縮文件或文件夾，則該文件或文件夾將會被解壓。
4.無法加密標記為“系統”屬性的文件，並且位於systemroot目錄結構中的文件也無法加密。
5.在加密文件夾時，系統將詢問是否要同時加密它的子文件夾。如果選擇是，那它的子文件夾也會被加密，以後所有添加進文件夾中的文件和子文件夾都將在添加時自動加密。
二、解密文件或文件夾
步驟一：打開Windows資源管理器。
步驟二：右鍵單擊加密文件或文件夾，然後單擊“屬性”。
步驟三：在“常規”選項卡上，單擊“高級”。
步驟四：清除“加密內容以便保護數據”復選框。
