/// <summary> /// 加密文件 /// </summary> /// <param name="inFile">待加密文件</param> /// <param name="outFile">加密后输入文件</param> /// <param name="password">加密密码</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; // 输入文件长度 int size = (int)lSize; byte[] bytes = new byte[BUFFER_SIZE]; // 缓存 int read = -1; // 输入文件读取数量 int value = 0; // 获取IV和salt byte[] IV = GenerateRandomBytes(16); byte[] salt = GenerateRandomBytes(16); // 创建加密对象 SymmetricAlgorithm sma = DESFileClass.CreateRijndael(password, salt); sma.IV = IV; // 在输出文件开始部分写入IV和salt fout.Write(IV, 0, IV.Length); fout.Write(salt, 0, salt.Length); // 创建散列加密 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); // 读写字节块到加密流缓冲区 while ((read = fin.Read(bytes, 0, bytes.Length)) != 0) { cout.Write(bytes, 0, read); chash.Write(bytes, 0, read); value += read; } // 关闭加密流 chash.Flush(); chash.Close(); // 读取散列 byte[] hash = hasher.Hash; // 输入文件写入散列 cout.Write(hash, 0, hash.Length); // 关闭文件流 cout.Flush(); cout.Close(); } } }
/// <summary> /// 输出日志信息到本地日志文件Debug中 /// </summary> /// <param name="operatorDT">当前操作时间</param> /// <param name="operators">当前操作人</param> /// <param name="describe">操作描述</param> /// <param name="state">操作状态</param> /// <param name="info">返回信息</param> /// <returns></returns> public static void FileLogToLocal(DateTime operatorDT, string operators, string describe, string state, string info) { string password = "******"; //string debugPath = System.Windows.Forms.Application.StartupPath;//获取debug文件路径 string UserPath = System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData); //获取当前系统登录用户目录 string LogPath = Path.Combine(UserPath, "CmstStorageLog"); //在当前系统登录用户目录下创建CmstStorageLog文件夹 string YearString = DateTime.Now.Year.ToString(); //获取当前年份 string YearPath = Path.Combine(LogPath, YearString + "年"); string MonthString = DateTime.Now.Month.ToString("00"); //获取当前月份 string MonthPath = Path.Combine(YearPath, MonthString + "月"); Directory.CreateDirectory(MonthPath); File.SetAttributes(MonthPath, FileAttributes.Hidden | FileAttributes.System);//设置Log文件夹隐藏,并设置为系统文件 string nowString = DateTime.Today.ToString("yyyy年MM月dd日"); string logName = nowString + ".txt"; string txtLogPath = Path.Combine(MonthPath, logName); //按当天日期新建TXT文件,保存加密前日志文件 string datName = nowString + ".dat"; string datLogPath = Path.Combine(MonthPath, datName); //按当天日期新建DAT文件,保存加密后日志文件 if (File.Exists(datLogPath)) { File.SetAttributes(datLogPath, FileAttributes.Normal); //取消文件的特殊属性,进行文件读写 DESFileClass.DecryptFile(datLogPath, txtLogPath, password); //日志文件解密 } using (StreamWriter sw = new StreamWriter(txtLogPath, true, Encoding.Default)) { string str = "**********************************************************************\r\n" + "操作时间:\r\n" + "\t" + operatorDT.ToString() + "\r\n" + "操作人:\r\n" + " \t" + operators + "\r\n" + "操作描述:\r\n" + "\t" + describe + "\r\n" + "操作状态:\r\n" + "\t" + state + "\r\n" + "返回信息:\r\n" + "\t" + info + "\r\n" + "**********************************************************************\r\n" + "\r\n"; sw.Write(str); } DESFileClass.EncryptFile(txtLogPath, datLogPath, password); File.SetAttributes(datLogPath, FileAttributes.Hidden | FileAttributes.System | FileAttributes.ReadOnly);//设置日志文件为系统文件,并隐藏,只读 File.Delete(txtLogPath); }
/// <summary> /// 解密文件 /// </summary> /// <param name="inFile">待解密文件</param> /// <param name="outFile">解密后输出文件</param> /// <param name="password">解密密码</param> public static void DecryptFile(string inFile, string outFile, string password) { // 创建打开文件流 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; // 创建散列对象, 校验文件 HashAlgorithm hasher = SHA256.Create(); using (CryptoStream cin = new CryptoStream(fin, sma.CreateDecryptor(), CryptoStreamMode.Read), chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write)) { // 读取文件长度 BinaryReader br = new BinaryReader(cin); lSize = br.ReadInt64(); ulong tag = br.ReadUInt64(); if (FC_TAG != tag) { throw new CryptoHelpException("文件被破坏"); } 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; // 获取比较和旧的散列对象 byte[] oldHash = new byte[hasher.HashSize / 8]; read = cin.Read(oldHash, 0, oldHash.Length); if ((oldHash.Length != read) || (!CheckByteArrays(oldHash, curHash))) { throw new CryptoHelpException("文件被破坏"); } } if (outValue != lSize) { throw new CryptoHelpException("文件大小不匹配"); } } }