Windows中應用C#為文件夾和文件編寫暗碼鎖的示例分享。本站提示廣大學習愛好者:(Windows中應用C#為文件夾和文件編寫暗碼鎖的示例分享)文章只能為提供參考,不一定能成為您想要的結果。以下是Windows中應用C#為文件夾和文件編寫暗碼鎖的示例分享正文
C#文件夾加鎖小對象
用C#說話完成一個文件夾鎖的法式,網上相似的“xxx文件夾xxx”軟件許多,然則根本上都是C/C++說話完成的,且都沒有供給源碼(這個可以懂得,究竟是加密法式,不該該洩漏源碼)。
法式的根本道理是:用C#說話重定名文件夾,經由過程重定名使之成為windows平安文件的類標識符。詳細的辦法是為文件夾添加拓展名“.{2559a1f2-21d7-11d4-bdaf-00c04f60b9f0}”
(.{2559a1f2-21d7-11d4-bdaf-00c04f60b9f0}是windows平安文件的類標識符),這時候文件夾的圖標就會釀成一把鎖,如許文件夾就被加鎖了。
法式的主界面異常簡練,截圖以下:
法式中加密解密文件夾的焦點代碼以下:
private void btnBrowseFolder_Click(object sender, EventArgs e) { status = lockType;// if (folderBrowserDialog1.ShowDialog() == DialogResult.OK) { DirectoryInfo d = new DirectoryInfo(folderBrowserDialog1.SelectedPath); string selectedpath = d.Parent.FullName + d.Name; if (folderBrowserDialog1.SelectedPath.LastIndexOf(".{") == -1)//經由過程文件夾稱號,斷定加密 { SetPwd(folderBrowserDialog1.SelectedPath); if (!d.Root.Equals(d.Parent.FullName)) { d.MoveTo(d.Parent.FullName + "\\" + d.Name + status);//文件夾重定名 } else d.MoveTo(d.Parent.FullName + d.Name + status); txtFolderPath.Text = folderBrowserDialog1.SelectedPath; } else//解密文件夾 { status = GetStatus(status); bool s = CheckPwd(); if (s) { File.Delete(folderBrowserDialog1.SelectedPath + "\\key.xml"); string path = folderBrowserDialog1.SelectedPath.Substring(0, folderBrowserDialog1.SelectedPath.LastIndexOf(".")); d.MoveTo(path); txtFolderPath.Text = path; } } } }
法式的運轉後果以下:
以加密D盤上面的test文件夾為例,成果以下:
起首經由過程folderBrowserDialog選擇響應的文件夾
輸出暗碼,加鎖
後果以下:
此時雙擊文件夾曾經沒法翻開。
選擇加密後的test文件夾,輸出加密時輸出的暗碼,可解鎖。
test文件夾曾經解密
加密解密文件小對象
下面分享了一個文件夾加密小對象,該對象是操作文件夾稱號的辦法完成文件夾的普通加密,文件夾中的文件(視頻、圖片等)都原封不動的保留在那邊。
在網上搜刮相干文件加密的法式,發明給出的根本都是針對“字符創”、“文本”的加密與解密。對視頻文件、圖片等普通文件的加密解密法式少之又少,所以我們上面再來完成一個對普通文件停止加密的小對象。
法式的重要功效是:用戶經由過程文件選擇框選摘要加密的文件-》輸出暗碼停止加密;選擇加密後的文件,輸出暗碼停止解密。
法式的主界面以下:
三個按鈕的Click事宜處置法式以下:
private void btnSelectFile_Click(object sender, EventArgs e) { if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) { txtFileName.Text = openFileDialog1.FileName ; } } private void btnEncryptFile_Click(object sender, EventArgs e) { string inFile=txtFileName.Text; string outFile = inFile + ".dat"; string password=txtPassword.Text ; DESFile.DESFileClass.EncryptFile(inFile, outFile, password);//加密文件 //刪除加密前的文件 File.Delete(inFile); txtFileName.Text = string.Empty; MessageBox.Show("加密勝利"); } private void btnDecryptFile_Click(object sender, EventArgs e) { string inFile = txtFileName.Text; string outFile = inFile.Substring(0,inFile.Length - 4); string password = txtPassword.Text; DESFile.DESFileClass.DecryptFile (inFile, outFile, password);//解密文件 //刪除解密前的文件 File.Delete(inFile); txtFileName.Text = string.Empty; MessageBox.Show("解密勝利"); } 加密解密的Help文件源碼以下: using System; using System.Collections.Generic; using System.Text; using System.Security.Cryptography; using System.IO; namespace DESFile { /// <summary> /// 異常處置類 /// </summary> public class CryptoHelpException : ApplicationException { public CryptoHelpException(string msg) : base(msg) { } } /// <summary> /// CryptHelp /// </summary> public class DESFileClass { private const ulong FC_TAG = 0xFC010203040506CF; private const int BUFFER_SIZE = 128 * 1024; /// <summary> /// 磨練兩個Byte數組能否雷同 /// </summary> /// <param name="b1">Byte數組</param> /// <param name="b2">Byte數組</param> /// <returns>true-相等</returns> private static bool CheckByteArrays(byte[] b1, byte[] b2) { if (b1.Length == b2.Length) { for (int i = 0; i < b1.Length; ++i) { if (b1[i] != b2[i]) return false; } return true; } return false; } /// <summary> /// 創立DebugLZQ ,http://www.cnblogs.com/DebugLZQ /// </summary> /// <param name="password">暗碼</param> /// <param name="salt"></param> /// <returns>加密對象</returns> private static SymmetricAlgorithm CreateRijndael(string password, byte[] salt) { PasswordDeriveBytes pdb = new PasswordDeriveBytes(password, salt, "SHA256", 1000); SymmetricAlgorithm sma = Rijndael.Create(); sma.KeySize = 256; sma.Key = pdb.GetBytes(32); sma.Padding = PaddingMode.PKCS7; return sma; } /// <summary> /// 加密文件隨機數生成 /// </summary> private static RandomNumberGenerator rand = new RNGCryptoServiceProvider(); /// <summary> /// 生成指定長度的隨機Byte數組 /// </summary> /// <param name="count">Byte數組長度</param> /// <returns>隨機Byte數組</returns> private static byte[] GenerateRandomBytes(int count) { byte[] bytes = new byte[count]; rand.GetBytes(bytes); return bytes; } /// <summary> /// 加密文件 /// </summary> /// <param name="inFile">待加密文件</param> /// <param name="outFile">加密後輸出文件</param> /// <param name="password">加密暗碼</param> public static void EncryptFile(string inFile, string outFile, string password) { using (FileStream fin = File.OpenRead(inFile), fout = File.OpenWrite(outFile)) { long lSize = fin.Length; // 輸出文件長度 int size = (int)lSize; byte[] bytes = new byte[BUFFER_SIZE]; // 緩存 int read = -1; // 輸出文件讀取數目 int value = 0; // 獲得IV和salt byte[] IV = GenerateRandomBytes(16); byte[] salt = GenerateRandomBytes(16); // 創立加密對象 SymmetricAlgorithm sma = DESFileClass.CreateRijndael(password, salt); sma.IV = IV; // 在輸入文件開端部門寫入IV和salt fout.Write(IV, 0, IV.Length); fout.Write(salt, 0, salt.Length); // 創立散列加密 HashAlgorithm hasher = SHA256.Create(); using (CryptoStream cout = new CryptoStream(fout, sma.CreateEncryptor(), CryptoStreamMode.Write), chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write)) { BinaryWriter bw = new BinaryWriter(cout); bw.Write(lSize); bw.Write(FC_TAG); // 讀寫字節塊到加密流緩沖區 while ((read = fin.Read(bytes, 0, bytes.Length)) != 0) { cout.Write(bytes, 0, read); chash.Write(bytes, 0, read); value += read; } // 封閉加密流 chash.Flush(); chash.Close(); // 讀取散列 byte[] hash = hasher.Hash; // 輸出文件寫入散列 cout.Write(hash, 0, hash.Length); // 封閉文件流 cout.Flush(); cout.Close(); } } } /// <summary> /// 解密文件 /// </summary> /// <param name="inFile">待解密文件</param> /// <param name="outFile">解密後輸入文件</param> /// <param name="password">解密暗碼</param> public static void DecryptFile(string inFile, string outFile, string password) { // 創立翻開文件流 using (FileStream fin = File.OpenRead(inFile), fout = File.OpenWrite(outFile)) { int size = (int)fin.Length; byte[] bytes = new byte[BUFFER_SIZE]; int read = -1; int value = 0; int outValue = 0; byte[] IV = new byte[16]; fin.Read(IV, 0, 16); byte[] salt = new byte[16]; fin.Read(salt, 0, 16); SymmetricAlgorithm sma = DESFileClass.CreateRijndael(password, salt); sma.IV = IV; value = 32; long lSize = -1; // 創立散列對象, 校驗文件 HashAlgorithm hasher = SHA256.Create(); using (CryptoStream cin = new CryptoStream(fin, sma.CreateDecryptor(), CryptoStreamMode.Read), chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write)) { // 讀取文件長度 BinaryReader br = new BinaryReader(cin); lSize = br.ReadInt64(); ulong tag = br.ReadUInt64(); if (FC_TAG != tag) throw new CryptoHelpException("文件被損壞"); long numReads = lSize / BUFFER_SIZE; long slack = (long)lSize % BUFFER_SIZE; for (int i = 0; i < numReads; ++i) { read = cin.Read(bytes, 0, bytes.Length); fout.Write(bytes, 0, read); chash.Write(bytes, 0, read); value += read; outValue += read; } if (slack > 0) { read = cin.Read(bytes, 0, (int)slack); fout.Write(bytes, 0, read); chash.Write(bytes, 0, read); value += read; outValue += read; } chash.Flush(); chash.Close(); fout.Flush(); fout.Close(); byte[] curHash = hasher.Hash; // 獲得比擬和舊的散列對象 byte[] oldHash = new byte[hasher.HashSize / 8]; read = cin.Read(oldHash, 0, oldHash.Length); if ((oldHash.Length != read) || (!CheckByteArrays(oldHash, curHash))) throw new CryptoHelpException("文件被損壞"); } if (outValue != lSize) throw new CryptoHelpException("文件年夜小不婚配"); } } } }
加密/解密成果:
以加密D盤下的1.avi為例,加密後的文件為1.avi.dat,即便重定名回1.avi文件仍然沒法翻開(文件被加密)。
輸出暗碼停止解密後,文件恢復解密,可以順遂翻開~