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C#文件加密方法汇总

柯书
2023-03-14
本文向大家介绍C#文件加密方法汇总,包括了C#文件加密方法汇总的使用技巧和注意事项,需要的朋友参考一下

本文实例汇总了C#文件加密方法。分享给大家供大家参考。具体实现方法如下:

1、AES加密类


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(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法)         /// </summary>         /// <param name="EncryptString">待加密密文</param>         /// <param name="EncryptKey">加密密钥</param>         public static string AESEncrypt(string EncryptString, string EncryptKey)         {             return Convert.ToBase64String(AESEncrypt(Encoding.Default.GetBytes(EncryptString), EncryptKey));         }         #endregion

        #region 加密字节数组         /// <summary>         /// AES 加密(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法)         /// </summary>         /// <param name="EncryptString">待加密密文</param>         /// <param name="EncryptKey">加密密钥</param>         public static byte[] AESEncrypt(byte[] EncryptByte, string EncryptKey)         {             if (EncryptByte.Length == 0) { throw (new Exception("明文不得为空")); }             if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); }             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);                 ICryptoTransform transform = m_AESProvider.CreateEncryptor(pdb.GetBytes(32), m_btIV);                 CryptoStream m_csstream = new CryptoStream(m_stream, transform, 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(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法)         /// </summary>         /// <param name="DecryptString">待解密密文</param>         /// <param name="DecryptKey">解密密钥</param>         public static string AESDecrypt(string DecryptString, string DecryptKey)         {             return Convert.ToBase64String(AESDecrypt(Encoding.Default.GetBytes(DecryptString), DecryptKey));         }         #endregion

        #region 解密字节数组         /// <summary>         /// AES 解密(高级加密标准,是下一代的加密算法标准,速度快,安全级别高,目前 AES 标准的一个实现是 Rijndael 算法)         /// </summary>         /// <param name="DecryptString">待解密密文</param>         /// <param name="DecryptKey">解密密钥</param>         public static byte[] AESDecrypt(byte[] DecryptByte, string DecryptKey)         {             if (DecryptByte.Length == 0) { throw (new Exception("密文不得为空")); }             if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); }             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);                 ICryptoTransform transform = m_AESProvider.CreateDecryptor(pdb.GetBytes(32), m_btIV);                 CryptoStream m_csstream = new CryptoStream(m_stream, transform, 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

    } }

2、文件加密类


using System.IO;

using System;

namespace Utils {     /// <summary>     /// 文件加密类     /// </summary>     public class FileEncrypt     {         #region 变量         /// <summary>         /// 一次处理的明文字节数         /// </summary>         public static readonly int encryptSize = 10000000;         /// <summary>         /// 一次处理的密文字节数         /// </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 fs = new FileStream(path, FileMode.Open, FileAccess.Read))                 {                     if (fs.Length > 0)                     {                         using (FileStream fsnew = new FileStream(path + ".temp", FileMode.OpenOrCreate, FileAccess.Write))                         {                             if (File.Exists(path + ".temp")) File.SetAttributes(path + ".temp", FileAttributes.Hidden);                             int blockCount = ((int)fs.Length - 1) / encryptSize + 1;                             for (int i = 0; i < blockCount; i++)                             {                                 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);                                 fsnew.Write(result, 0, result.Length);                                 fsnew.Flush();                                 refreshFileProgress(blockCount, i + 1); //更新进度                             }                             fsnew.Close();                             fsnew.Dispose();                         }                         fs.Close();                         fs.Dispose();                         FileAttributes fileAttr = File.GetAttributes(path);                         File.SetAttributes(path, FileAttributes.Archive);                         File.Delete(path);                         File.Move(path + ".temp", path);                         File.SetAttributes(path, fileAttr);                     }                 }             }             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 fs = new FileStream(path, FileMode.Open, FileAccess.Read))                 {                     if (fs.Length > 0)                     {                         using (FileStream fsnew = new FileStream(path + ".temp", FileMode.OpenOrCreate, FileAccess.Write))                         {                             if (File.Exists(path + ".temp")) File.SetAttributes(path + ".temp", FileAttributes.Hidden);                             int blockCount = ((int)fs.Length - 1) / decryptSize + 1;                             for (int i = 0; i < blockCount; i++)                             {                                 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);                                 fsnew.Write(result, 0, result.Length);                                 fsnew.Flush();                                 refreshFileProgress(blockCount, i + 1); //更新进度                             }                             fsnew.Close();                             fsnew.Dispose();                         }                         fs.Close();                         fs.Dispose();                         FileAttributes fileAttr = File.GetAttributes(path);                         File.SetAttributes(path, FileAttributes.Archive);                         File.Delete(path);                         File.Move(path + ".temp", path);                         File.SetAttributes(path, fileAttr);                     }                 }             }             catch (Exception ex)             {                 File.Delete(path + ".temp");                 throw ex;             }         }         #endregion

    }

    /// <summary>     /// 更新文件加密进度     /// </summary>     public delegate void RefreshFileProgress(int max, int value);

}

3、文件夹加密类


using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using Utils;

namespace EncryptFile.Utils {     /// <summary>     /// 文件夹加密类     /// </summary>     public class DirectoryEncrypt     {         #region 加密文件夹及其子文件夹中的所有文件         /// <summary>         /// 加密文件夹及其子文件夹中的所有文件         /// </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 解密文件夹及其子文件夹中的所有文件         /// <summary>         /// 解密文件夹及其子文件夹中的所有文件         /// </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>     /// 更新文件夹加密进度     /// </summary>     public delegate void RefreshDirProgress(int max, int value);

}

4、跨线程访问控制委托


using System;

using System.Windows.Forms;

namespace Utils {     /// <summary>     /// 跨线程访问控件的委托     /// </summary>     public delegate void InvokeDelegate();

    /// <summary>     /// 跨线程访问控件类     /// </summary>     public class InvokeUtil     {         /// <summary>         /// 跨线程访问控件         /// </summary>         /// <param name="ctrl">Form对象</param>         /// <param name="de">委托</param>         public static void Invoke(Control ctrl, Delegate de)         {             if (ctrl.IsHandleCreated)             {                 ctrl.BeginInvoke(de);             }         }     } }

5、Form1.cs文件


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 变量         /// <summary>         /// 一次处理的明文字节数         /// </summary>         public static int encryptSize = 10000000;         /// <summary>         /// 一次处理的密文字节数         /// </summary>         public static int decryptSize = 10000016;         #endregion

        #region 构造函数         public Form1()         {             InitializeComponent();         }         #endregion

        #region 加密文件         private void btnEncrypt_Click(object sender, EventArgs e)         {             #region 验证             if (txtPwd.Text == "")             {                 MessageBox.Show("密码不能为空", "提示");                 return;             }

            if (txtPwdCfm.Text == "")             {                 MessageBox.Show("确认密码不能为空", "提示");                 return;             }

            if (txtPwdCfm.Text != txtPwd.Text)             {                 MessageBox.Show("两次输入的密码不相同", "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,耗时" + t + "秒", "提示") == DialogResult.OK)                         {                             invokeDelegate = delegate()                             {                                 EnableBtns();                             };                             InvokeUtil.Invoke(this, invokeDelegate);                         }                     }                     catch (Exception ex)                     {                         if (MessageBox.Show("加密失败:" + 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 验证             if (txtPwd.Text == "")             {                 MessageBox.Show("密码不能为空", "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,耗时" + t + "秒", "提示") == DialogResult.OK)                         {                             invokeDelegate = delegate()                             {                                 EnableBtns();                             };                             InvokeUtil.Invoke(this, invokeDelegate);                         }                     }                     catch (Exception ex)                     {                         if (MessageBox.Show("解密失败:" + ex.Message, "提示") == DialogResult.OK)                         {                             InvokeDelegate invokeDelegate = delegate()                             {                                 EnableBtns();                             };                             InvokeUtil.Invoke(this, invokeDelegate);                         }                     }                 }));                 thread.Start();             }         }         #endregion

        #region 文件夹加密         private void btnEncryptDir_Click(object sender, EventArgs e)         {             #region 验证             if (txtPwd.Text == "")             {                 MessageBox.Show("密码不能为空", "提示");                 return;             }

            if (txtPwdCfm.Text == "")             {                 MessageBox.Show("确认密码不能为空", "提示");                 return;             }

            if (txtPwdCfm.Text != txtPwd.Text)             {                 MessageBox.Show("两次输入的密码不相同", "提示");                 return;             }             #endregion

            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)             {                 if (MessageBox.Show(string.Format("确定加密文件夹{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 = "文件夹:" + 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,耗时" + t + "秒", "提示") == DialogResult.OK)                         {                             invokeDelegate = delegate()                             {                                 EnableBtns();                             };                             InvokeUtil.Invoke(this, invokeDelegate);                         }                     }                     catch (Exception ex)                     {                         if (MessageBox.Show("加密失败:" + ex.Message, "提示") == DialogResult.OK)                         {                             InvokeDelegate invokeDelegate = delegate()                             {                                 EnableBtns();                             };                             InvokeUtil.Invoke(this, invokeDelegate);                         }                     }                 }));                 thread.Start();             }         }         #endregion

        #region 文件夹解密         private void btnDecryptDir_Click(object sender, EventArgs e)         {             #region 验证             if (txtPwd.Text == "")             {                 MessageBox.Show("密码不能为空", "提示");                 return;             }             #endregion

            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)             {                 if (MessageBox.Show(string.Format("确定解密文件夹{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;               &n

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