C#密碼編譯演算法匯總

//方法一：      //須添加對System.Web的引用        using System.Web.Security;            /// <summary>       /// SHA1加密字串       /// </summary>       /// <param name="source">源字串</param>       /// <returns>加密後的字串</returns>       public string SHA1(string source)        {          return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");       }             /// <summary>      /// MD5加密字串     /// </summary>      /// <param name="source">源字串</param>       /// <returns>加密後的字串</returns>      public string MD5(string source)       {         return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");;        }  //方法二(可逆加密解密)：     using System.Security.Cryptography;                     public string Encode(string data)        {          byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);           byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            int i = cryptoProvider.KeySize;           MemoryStream ms = new MemoryStream();            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);                   StreamWriter sw = new StreamWriter(cst);           sw.Write(data);          sw.Flush();          cst.FlushFinalBlock();               sw.Flush();          return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);              }               public string Decode(string data)        {            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);           byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);                  byte[] byEnc;           try          {                byEnc = Convert.FromBase64String(data);            }            catch           {                return null;           }                    DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            MemoryStream ms = new MemoryStream(byEnc);            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);            StreamReader sr = new StreamReader(cst);            return sr.ReadToEnd();        }  //方法三(MD5無法復原)：      using System.Security.Cryptography;                        //MD5無法復原加密               //32位加密             public string GetMD5_32(string s, string _input_charset)        {           MD5 md5 = new MD5CryptoServiceProvider();            byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));            StringBuilder sb = new StringBuilder(32);            for (int i = 0; i < t.Length; i++)           {               sb.Append(t[i].ToString("x").PadLeft(2, '0'));           }            return sb.ToString();       }               //16位加密        public static string GetMd5_16(string ConvertString)        {            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();            string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);           t2 = t2.Replace("-", "");            return t2;        }  //方法四(對稱式加密)：       using System.IO;        using System.Security.Cryptography;                  private SymmetricAlgorithm mobjCryptoService;        private string Key;       /// <summary>          /// 對稱式加密類的建構函式           /// </summary>          public SymmetricMethod()        {            mobjCryptoService = new RijndaelManaged();           Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";        }        /// <summary>           /// 獲得密鑰          /// </summary>          /// <returns>密鑰</returns>           private byte[] GetLegalKey()        {            string sTemp = Key;           mobjCryptoService.GenerateKey();            byte[] bytTemp = mobjCryptoService.Key;            int KeyLength = bytTemp.Length;            if (sTemp.Length > KeyLength)                sTemp = sTemp.Substring(0, KeyLength);            else if (sTemp.Length < KeyLength)                sTemp = sTemp.PadRight(KeyLength, ' ');            return ASCIIEncoding.ASCII.GetBytes(sTemp);        }        /// <summary>           /// 獲得初始向量IV           /// </summary>           /// <returns>初試向量IV</returns>           private byte[] GetLegalIV()        {            string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";            mobjCryptoService.GenerateIV();            byte[] bytTemp = mobjCryptoService.IV;            int IVLength = bytTemp.Length;            if (sTemp.Length > IVLength)                sTemp = sTemp.Substring(0, IVLength);            else if (sTemp.Length < IVLength)                sTemp = sTemp.PadRight(IVLength, ' ');            return ASCIIEncoding.ASCII.GetBytes(sTemp);        }       /// <summary>           /// 加密方法           /// </summary>           /// <param name="Source">待加密的串</param>           /// <returns>經過加密的串</returns>           public string Encrypto(string Source)        {            byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);            MemoryStream ms = new MemoryStream();            mobjCryptoService.Key = GetLegalKey();            mobjCryptoService.IV = GetLegalIV();            ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();            CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);           cs.Write(bytIn, 0, bytIn.Length);           cs.FlushFinalBlock();            ms.Close();            byte[] bytOut = ms.ToArray();            return Convert.ToBase64String(bytOut);        }       /// <summary>           /// 解密方法           /// </summary>           /// <param name="Source">待解密的串</param>           /// <returns>經過解密的串</returns>           public string Decrypto(string Source)        {            byte[] bytIn = Convert.FromBase64String(Source);            MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length);            mobjCryptoService.Key = GetLegalKey();            mobjCryptoService.IV = GetLegalIV();            ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();            CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);            StreamReader sr = new StreamReader(cs);            return sr.ReadToEnd();        } // 方法五：       using System.IO;        using System.Security.Cryptography;        using System.Text;                           //預設密鑰向量        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };        /// <summary>        /// DES加密字串        /// </summary>        /// <param name="encryptString">待加密的字串</param>        /// <param name="encryptKey">加密金鑰,要求為8位</param>        /// <returns>加密成功返回加密後的字串，失敗返回源串</returns>        public static string EncryptDES(string encryptString, string encryptKey)        {            try           {                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));                byte[] rgbIV = Keys;                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);               DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();                           MemoryStream mStream = new MemoryStream();                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);                cStream.Write(inputByteArray, 0, inputByteArray.Length);                cStream.FlushFinalBlock();                return Convert.ToBase64String(mStream.ToArray());            }            catch           {                return encryptString;           }       }        /// <summary>        /// DES解密字串        /// </summary>        /// <param name="decryptString">待解密的字串</param>        /// <param name="decryptKey">解密密鑰,要求為8位,和加密金鑰相同</param>        /// <returns>解密成功返回解密後的字串，失敗返源串</returns>        public static string DecryptDES(string decryptString, string decryptKey)        {            try           {                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);                byte[] rgbIV = Keys;                byte[] inputByteArray = Convert.FromBase64String(decryptString);                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();                MemoryStream mStream = new MemoryStream();                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);                cStream.Write(inputByteArray, 0, inputByteArray.Length);                cStream.FlushFinalBlock();                return Encoding.UTF8.GetString(mStream.ToArray());            }            catch          {               return decryptString;           }        } // 方法六(檔案加密)：       using System.IO;        using System.Security.Cryptography;        using System.Text;                      //加密檔案        private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)        {            //Create the file streams to handle the input and output files.           FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);            FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);            fout.SetLength(0);                    //Create variables to help with read and write.            byte[] bin = new byte[100]; //This is intermediate storage for the encryption.            long rdlen = 0;              //This is the total number of bytes written.            long totlen = fin.Length;    //This is the total length of the input file.            int len;                     //This is the number of bytes to be written at a time.                    DES des = new DESCryptoServiceProvider();            CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);                    //Read from the input file, then encrypt and write to the output file.            while (rdlen < totlen)            {                len = fin.Read(bin, 0, 100);                encStream.Write(bin, 0, len);                rdlen = rdlen + len;            }                    encStream.Close();            fout.Close();            fin.Close();        }                //解密檔案        private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)        {            //Create the file streams to handle the input and output files.            FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);            FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);            fout.SetLength(0);                    //Create variables to help with read and write.            byte[] bin = new byte[100]; //This is intermediate storage for the encryption.            long rdlen = 0;              //This is the total number of bytes written.            long totlen = fin.Length;    //This is the total length of the input file.            int len;                     //This is the number of bytes to be written at a time.                    DES des = new DESCryptoServiceProvider();            CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);                    //Read from the input file, then encrypt and write to the output file.            while (rdlen < totlen)            {               len = fin.Read(bin, 0, 100);                encStream.Write(bin, 0, len);                rdlen = rdlen + len;            }                    encStream.Close();            fout.Close();            fin.Close();        }   using System;   using System.Security.Cryptography;//這個是處理文字編碼的前提   using System.Text;   using System.IO;  /// <summary>   /// DES加密方法   /// </summary>   /// <param name="strPlain">明文</param>   /// <param name="strDESKey">密鑰</param>   /// <param name="strDESIV">向量</param>   /// <returns>密文</returns>   public string DESEncrypt(string strPlain,string strDESKey,string strDESIV)   {    //把密鑰轉換成位元組數組    byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);    //把向量轉換成位元組數組    byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);    //聲明1個新的DES對象    DESCryptoServiceProvider desEncrypt=new DESCryptoServiceProvider();    //開闢一塊記憶體流    MemoryStream msEncrypt=new MemoryStream();    //把記憶體流對象封裝成加密流對象    CryptoStream csEncrypt=new CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write);    //把加密流對象封裝成寫入流對象    StreamWriter swEncrypt=new StreamWriter(csEncrypt);    //寫入流對象寫入明文    swEncrypt.WriteLine(strPlain);    //寫入流關閉    swEncrypt.Close();    //加密流關閉    csEncrypt.Close();    //把記憶體流轉換成位元組數組，記憶體流現在已經是密文了    byte[] bytesCipher=msEncrypt.ToArray();    //記憶體流關閉    msEncrypt.Close();    //把密文位元組數群組轉換為字串，並返回    return UnicodeEncoding.Unicode.GetString(bytesCipher);   }                  /// <summary>   /// DES解密方法   /// </summary>   /// <param name="strCipher">密文</param>   /// <param name="strDESKey">密鑰</param>   /// <param name="strDESIV">向量</param>   /// <returns>明文</returns>   public string DESDecrypt(string strCipher,string strDESKey,string strDESIV)   {    //把密鑰轉換成位元組數組    byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);    //把向量轉換成位元組數組    byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);    //把密文轉換成位元組數組    byte[] bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher);    //聲明1個新的DES對象    DESCryptoServiceProvider desDecrypt=new DESCryptoServiceProvider();    //開闢一塊記憶體流，並存放密文位元組數組    MemoryStream msDecrypt=new MemoryStream(bytesCipher);    //把記憶體流對象封裝成解密流對象    CryptoStream csDecrypt=new CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read);    //把解密流對象封裝成讀出流對象    StreamReader srDecrypt=new StreamReader(csDecrypt);    //明文=讀出流的讀出內容    string strPlainText=srDecrypt.ReadLine();    //讀出流關閉    srDecrypt.Close();    //解密流關閉    csDecrypt.Close();    //記憶體流關閉    msDecrypt.Close();    //返回明文    return strPlainText;   }