/// <summary> /// MySecurity(安全类) 的摘要说明。 /// </summary> public class MySecurity { /// <summary> /// 初始化安全类 /// </summary> public MySecurity() { ///默认密码 key = "0123456789"; } private string key; //默认密钥 private byte[] sKey; private byte[] sIV; #region 加密字符串 /// <summary> /// 加密字符串 /// </summary> /// <param name="inputStr">输入字符串</param> /// <param name="keyStr">密码，可以为“”</param> /// <returns>输出加密后字符串</returns> static public string SEncryptString(string inputStr, string keyStr) { MySecurity ws = new MySecurity(); return ws.EncryptString(inputStr, keyStr); } /// <summary> /// 加密字符串 /// </summary> /// <param name="inputStr">输入字符串</param> /// <param name="keyStr">密码，可以为“”</param> /// <returns>输出加密后字符串</returns> public string EncryptString(string inputStr, string keyStr) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); if (keyStr == "") keyStr = key; byte[] inputByteArray = Encoding.Default.GetBytes(inputStr); byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); SHA1 ha = new SHA1Managed(); byte[] hb = ha.ComputeHash(keyByteArray); sKey = new byte[8]; sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; des.Key = sKey; des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } cs.Close(); ms.Close(); return ret.ToString(); } #endregion #region 加密字符串 密钥为系统默认 0123456789 /// <summary> /// 加密字符串 密钥为系统默认 /// </summary> /// <param name="inputStr">输入字符串</param> /// <returns>输出加密后字符串</returns> static public string SEncryptString(string inputStr) { MySecurity ws = new MySecurity(); return ws.EncryptString(inputStr, ""); } #endregion #region 加密文件 /// <summary> /// 加密文件 /// </summary> /// <param name="filePath">输入文件路径</param> /// <param name="savePath">加密后输出文件路径</param> /// <param name="keyStr">密码，可以为“”</param> /// <returns></returns> public bool EncryptFile(string filePath, string savePath, string keyStr) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); if (keyStr == "") keyStr = key; FileStream fs = File.OpenRead(filePath); byte[] inputByteArray = new byte[fs.Length]; fs.Read(inputByteArray, 0, (int)fs.Length); fs.Close(); byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); SHA1 ha = new SHA1Managed(); byte[] hb = ha.ComputeHash(keyByteArray); sKey = new byte[8]; sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; des.Key = sKey; des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); fs = File.OpenWrite(savePath); foreach (byte b in ms.ToArray()) { fs.WriteByte(b); } fs.Close(); cs.Close(); ms.Close(); return true; } #endregion #region 解密字符串 /// <summary> /// 解密字符串 /// </summary> /// <param name="inputStr">要解密的字符串</param> /// <param name="keyStr">密钥</param> /// <returns>解密后的结果</returns> static public string SDecryptString(string inputStr, string keyStr) { MySecurity ws = new MySecurity(); return ws.DecryptString(inputStr, keyStr); } /// <summary> /// 解密字符串 密钥为系统默认 /// </summary> /// <param name="inputStr">要解密的字符串</param> /// <returns>解密后的结果</returns> static public string SDecryptString(string inputStr) { MySecurity ws = new MySecurity(); return ws.DecryptString(inputStr, ""); } /// <summary> /// 解密字符串 /// </summary> /// <param name="inputStr">要解密的字符串</param> /// <param name="keyStr">密钥</param> /// <returns>解密后的结果</returns> public string DecryptString(string inputStr, string keyStr) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); if (keyStr == "") keyStr = key; byte[] inputByteArray = new byte[inputStr.Length / 2]; for (int x = 0; x < inputStr.Length / 2; x++) { int i = (Convert.ToInt32(inputStr.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; } byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); SHA1 ha = new SHA1Managed(); byte[] hb = ha.ComputeHash(keyByteArray); sKey = new byte[8]; sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; des.Key = sKey; des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); return System.Text.Encoding.Default.GetString(ms.ToArray()); } #endregion #region 解密文件 /// <summary> /// 解密文件 /// </summary> /// <param name="filePath">输入文件路径</param> /// <param name="savePath">解密后输出文件路径</param> /// <param name="keyStr">密码，可以为“”</param> /// <returns></returns> public bool DecryptFile(string filePath, string savePath, string keyStr) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); if (keyStr == "") keyStr = key; FileStream fs = File.OpenRead(filePath); byte[] inputByteArray = new byte[fs.Length]; fs.Read(inputByteArray, 0, (int)fs.Length); fs.Close(); byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); SHA1 ha = new SHA1Managed(); byte[] hb = ha.ComputeHash(keyByteArray); sKey = new byte[8]; sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; des.Key = sKey; des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); fs = File.OpenWrite(savePath); foreach (byte b in ms.ToArray()) { fs.WriteByte(b); } fs.Close(); cs.Close(); ms.Close(); return true; } #endregion #region MD5加密 /// <summary> /// 128位MD5算法加密字符串 /// </summary> /// <param name="text">要加密的字符串</param> public static string MD5(string text) { //如果字符串为空，则返回 if (Tools.IsNullOrEmpty<string>(text)) { return ""; } //返回MD5值的字符串表示 return MD5(text); } /// <summary> /// 128位MD5算法加密Byte数组 /// </summary> /// <param name="data">要加密的Byte数组</param> public static string MD5(byte[] data) { //如果Byte数组为空，则返回 if (Tools.IsNullOrEmpty<byte[]>(data)) { return ""; } try { //创建MD5密码服务提供程序 MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); //计算传入的字节数组的哈希值 byte[] result = md5.ComputeHash(data); //释放资源 md5.Clear(); //返回MD5值的字符串表示 return Convert.ToBase64String(result); } catch { //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message); return ""; } } #endregion #region Base64加密 /// <summary> /// Base64加密 /// </summary> /// <param name="text">要加密的字符串</param> /// <returns></returns> public static string EncodeBase64(string text) { //如果字符串为空，则返回 if (Tools.IsNullOrEmpty<string>(text)) { return ""; } try { char[] Base64Code = new char[]{'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T', 'U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n', 'o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7', '8','9','+','/','='}; byte empty = (byte)0; ArrayList byteMessage = new ArrayList(Encoding.Default.GetBytes(text)); StringBuilder outmessage; int messageLen = byteMessage.Count; int page = messageLen / 3; int use = 0; if ((use = messageLen % 3) > 0) { for (int i = 0; i < 3 - use; i++) byteMessage.Add(empty); page++; } outmessage = new System.Text.StringBuilder(page * 4); for (int i = 0; i < page; i++) { byte[] instr = new byte[3]; instr[0] = (byte)byteMessage[i * 3]; instr[1] = (byte)byteMessage[i * 3 + 1]; instr[2] = (byte)byteMessage[i * 3 + 2]; int[] outstr = new int[4]; outstr[0] = instr[0] >> 2; outstr[1] = ((instr[0] & 0x03) << 4) ^ (instr[1] >> 4); if (!instr[1].Equals(empty)) outstr[2] = ((instr[1] & 0x0f) << 2) ^ (instr[2] >> 6); else outstr[2] = 64; if (!instr[2].Equals(empty)) outstr[3] = (instr[2] & 0x3f); else outstr[3] = 64; outmessage.Append(Base64Code[outstr[0]]); outmessage.Append(Base64Code[outstr[1]]); outmessage.Append(Base64Code[outstr[2]]); outmessage.Append(Base64Code[outstr[3]]); } return outmessage.ToString(); } catch (Exception ex) { throw ex; } } #endregion #region Base64解密 /// <summary> /// Base64解密 /// </summary> /// <param name="text">要解密的字符串</param> public static string DecodeBase64(string text) { //如果字符串为空，则返回 if (Tools.IsNullOrEmpty<string>(text)) { return ""; } //将空格替换为加号 text = text.Replace(" ", "+"); try { if ((text.Length % 4) != 0) { return "包含不正确的BASE64编码"; } if (!Regex.IsMatch(text, "^[A-Z0-9/+=]*$", RegexOptions.IgnoreCase)) { return "包含不正确的BASE64编码"; } string Base64Code = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; int page = text.Length / 4; ArrayList outMessage = new ArrayList(page * 3); char[] message = text.ToCharArray(); for (int i = 0; i < page; i++) { byte[] instr = new byte[4]; instr[0] = (byte)Base64Code.IndexOf(message[i * 4]); instr[1] = (byte)Base64Code.IndexOf(message[i * 4 + 1]); instr[2] = (byte)Base64Code.IndexOf(message[i * 4 + 2]); instr[3] = (byte)Base64Code.IndexOf(message[i * 4 + 3]); byte[] outstr = new byte[3]; outstr[0] = (byte)((instr[0] << 2) ^ ((instr[1] & 0x30) >> 4)); if (instr[2] != 64) { outstr[1] = (byte)((instr[1] << 4) ^ ((instr[2] & 0x3c) >> 2)); } else { outstr[2] = 0; } if (instr[3] != 64) { outstr[2] = (byte)((instr[2] << 6) ^ instr[3]); } else { outstr[2] = 0; } outMessage.Add(outstr[0]); if (outstr[1] != 0) outMessage.Add(outstr[1]); if (outstr[2] != 0) outMessage.Add(outstr[2]); } byte[] outbyte = (byte[])outMessage.ToArray(Type.GetType("System.Byte")); return Encoding.Default.GetString(outbyte); } catch (Exception ex) { throw ex; } } #endregion }