• C#加密算法汇总

    方法一：
    02     //须添加对System.Web的引用 
    03     using System.Web.Security; 
    04       
    05     ... 
    06       
    07     /// <summary> 
    08     /// SHA1加密字符串 
    09     /// </summary> 
    10     /// <param name="source">源字符串</param> 
    11     /// <returns>加密后的字符串</returns> 
    12     public string SHA1(string source) 
    13     { 
    14         return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1"); 
    15     } 
    16   
    17   
    18     /// <summary> 
    19     /// MD5加密字符串 
    20     /// </summary> 
    21     /// <param name="source">源字符串</param> 
    22     /// <returns>加密后的字符串</returns> 
    23     public string MD5(string source) 
    24     { 
    25         return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");; 
    26     }
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    01 方法二(可逆加密解密)：
    02     using System.Security.Cryptography; 
    03       
    04     ... 
    05       
    06     public string Encode(string data) 
    07     { 
    08         byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 
    09         byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 
    10       
    11         DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 
    12         int i = cryptoProvider.KeySize; 
    13         MemoryStream ms = new MemoryStream(); 
    14         CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); 
    15       
    16         StreamWriter sw = new StreamWriter(cst); 
    17         sw.Write(data); 
    18         sw.Flush(); 
    19         cst.FlushFinalBlock(); 
    20         sw.Flush(); 
    21         return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); 
    22       
    23     } 
    24       
    25     public string Decode(string data) 
    26     { 
    27         byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 
    28         byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 
    29       
    30         byte[] byEnc; 
    31         try 
    32         { 
    33             byEnc = Convert.FromBase64String(data); 
    34         } 
    35         catch 
    36         { 
    37             return null; 
    38         } 
    39       
    40         DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 
    41         MemoryStream ms = new MemoryStream(byEnc); 
    42         CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); 
    43         StreamReader sr = new StreamReader(cst); 
    44         return sr.ReadToEnd(); 
    45     }
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    01 方法三(MD5不可逆)：
    02     using System.Security.Cryptography; 
    03       
    04     ... 
    05       
    06     //MD5不可逆加密 
    07       
    08     //32位加密 
    09       
    10     public string GetMD5_32(string s, string _input_charset) 
    11     { 
    12         MD5 md5 = new MD5CryptoServiceProvider(); 
    13         byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); 
    14         StringBuilder sb = new StringBuilder(32); 
    15         for (int i = 0; i < t.Length; i++) 
    16         { 
    17             sb.Append(t[i].ToString("x").PadLeft(2, '0')); 
    18         } 
    19         return sb.ToString(); 
    20     } 
    21       
    22     //16位加密 
    23     public static string GetMd5_16(string ConvertString) 
    24     { 
    25         MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); 
    26         string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); 
    27         t2 = t2.Replace("-", ""); 
    28         return t2; 
    29     }
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    01 方法四(对称加密)：
    02     using System.IO; 
    03     using System.Security.Cryptography; 
    04       
    05     ... 
    06       
    07     private SymmetricAlgorithm mobjCryptoService; 
    08     private string Key; 
    09     /// <summary>    
    10     /// 对称加密类的构造函数    
    11     /// </summary>    
    12     public SymmetricMethod() 
    13     { 
    14         mobjCryptoService = new RijndaelManaged(); 
    15         Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"; 
    16     } 
    17     /// <summary>    
    18     /// 获得密钥    
    19     /// </summary>    
    20     /// <returns>密钥</returns>    
    21     private byte[] GetLegalKey() 
    22     { 
    23         string sTemp = Key; 
    24         mobjCryptoService.GenerateKey(); 
    25         byte[] bytTemp = mobjCryptoService.Key; 
    26         int KeyLength = bytTemp.Length; 
    27         if (sTemp.Length > KeyLength) 
    28             sTemp = sTemp.Substring(0, KeyLength); 
    29         else if (sTemp.Length < KeyLength) 
    30             sTemp = sTemp.PadRight(KeyLength, ' '); 
    31         return ASCIIEncoding.ASCII.GetBytes(sTemp); 
    32     } 
    33     /// <summary>    
    34     /// 获得初始向量IV    
    35     /// </summary>    
    36     /// <returns>初试向量IV</returns>    
    37     private byte[] GetLegalIV() 
    38     { 
    39         string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"; 
    40         mobjCryptoService.GenerateIV(); 
    41         byte[] bytTemp = mobjCryptoService.IV; 
    42         int IVLength = bytTemp.Length; 
    43         if (sTemp.Length > IVLength) 
    44             sTemp = sTemp.Substring(0, IVLength); 
    45         else if (sTemp.Length < IVLength) 
    46             sTemp = sTemp.PadRight(IVLength, ' '); 
    47         return ASCIIEncoding.ASCII.GetBytes(sTemp); 
    48     } 
    49     /// <summary>    
    50     /// 加密方法    
    51     /// </summary>    
    52     /// <param name="Source">待加密的串</param>    
    53     /// <returns>经过加密的串</returns>    
    54     public string Encrypto(string Source) 
    55     { 
    56         byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); 
    57         MemoryStream ms = new MemoryStream(); 
    58         mobjCryptoService.Key = GetLegalKey(); 
    59         mobjCryptoService.IV = GetLegalIV(); 
    60         ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); 
    61         CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); 
    62         cs.Write(bytIn, 0, bytIn.Length); 
    63         cs.FlushFinalBlock(); 
    64         ms.Close(); 
    65         byte[] bytOut = ms.ToArray(); 
    66         return Convert.ToBase64String(bytOut); 
    67     } 
    68     /// <summary>    
    69     /// 解密方法    
    70     /// </summary>    
    71     /// <param name="Source">待解密的串</param>    
    72     /// <returns>经过解密的串</returns>    
    73     public string Decrypto(string Source) 
    74     { 
    75         byte[] bytIn = Convert.FromBase64String(Source); 
    76         MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); 
    77         mobjCryptoService.Key = GetLegalKey(); 
    78         mobjCryptoService.IV = GetLegalIV(); 
    79         ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); 
    80         CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); 
    81         StreamReader sr = new StreamReader(cs); 
    82         return sr.ReadToEnd(); 
    83     }
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    01 方法五：
    02     using System.IO; 
    03     using System.Security.Cryptography; 
    04     using System.Text; 
    05       
    06     ... 
    07       
    08     //默认密钥向量 
    09     private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; 
    10     /// <summary> 
    11     /// DES加密字符串 
    12     /// </summary> 
    13     /// <param name="encryptString">待加密的字符串</param> 
    14     /// <param name="encryptKey">加密密钥,要求为8位</param> 
    15     /// <returns>加密成功返回加密后的字符串，失败返回源串</returns> 
    16     public static string EncryptDES(string encryptString, string encryptKey) 
    17     { 
    18         try 
    19         { 
    20             byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); 
    21             byte[] rgbIV = Keys; 
    22             byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); 
    23             DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); 
    24             MemoryStream mStream = new MemoryStream(); 
    25             CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 
    26             cStream.Write(inputByteArray, 0, inputByteArray.Length); 
    27             cStream.FlushFinalBlock(); 
    28             return Convert.ToBase64String(mStream.ToArray()); 
    29         } 
    30         catch 
    31         { 
    32             return encryptString; 
    33         } 
    34     } 
    35       
    36     /// <summary> 
    37     /// DES解密字符串 
    38     /// </summary> 
    39     /// <param name="decryptString">待解密的字符串</param> 
    40     /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> 
    41     /// <returns>解密成功返回解密后的字符串，失败返源串</returns> 
    42     public static string DecryptDES(string decryptString, string decryptKey) 
    43     { 
    44         try 
    45         { 
    46             byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); 
    47             byte[] rgbIV = Keys; 
    48             byte[] inputByteArray = Convert.FromBase64String(decryptString); 
    49             DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); 
    50             MemoryStream mStream = new MemoryStream(); 
    51             CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 
    52             cStream.Write(inputByteArray, 0, inputByteArray.Length); 
    53             cStream.FlushFinalBlock(); 
    54             return Encoding.UTF8.GetString(mStream.ToArray()); 
    55         } 
    56         catch 
    57         { 
    58             return decryptString; 
    59         } 
    60     }
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    01 方法六(文件加密)：
    02     using System.IO; 
    03     using System.Security.Cryptography; 
    04     using System.Text; 
    05       
    06     ... 
    07       
    08     //加密文件 
    09     private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) 
    10     { 
    11         //Create the file streams to handle the input and output files. 
    12         FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 
    13         FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 
    14         fout.SetLength(0); 
    15       
    16         //Create variables to help with read and write. 
    17         byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 
    18         long rdlen = 0;              //This is the total number of bytes written. 
    19         long totlen = fin.Length;    //This is the total length of the input file. 
    20         int len;                     //This is the number of bytes to be written at a time. 
    21       
    22         DES des = new DESCryptoServiceProvider(); 
    23         CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); 
    24       
    25         //Read from the input file, then encrypt and write to the output file. 
    26         while (rdlen < totlen) 
    27         { 
    28             len = fin.Read(bin, 0, 100); 
    29             encStream.Write(bin, 0, len); 
    30             rdlen = rdlen + len; 
    31         } 
    32       
    33         encStream.Close(); 
    34         fout.Close(); 
    35         fin.Close(); 
    36     } 
    37       
    38     //解密文件 
    39     private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV) 
    40     { 
    41         //Create the file streams to handle the input and output files. 
    42         FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 
    43         FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 
    44         fout.SetLength(0); 
    45       
    46         //Create variables to help with read and write. 
    47         byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 
    48         long rdlen = 0;              //This is the total number of bytes written. 
    49         long totlen = fin.Length;    //This is the total length of the input file. 
    50         int len;                     //This is the number of bytes to be written at a time. 
    51       
    52         DES des = new DESCryptoServiceProvider(); 
    53         CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write); 
    54       
    55         //Read from the input file, then encrypt and write to the output file. 
    56         while (rdlen < totlen) 
    57         { 
    58             len = fin.Read(bin, 0, 100); 
    59             encStream.Write(bin, 0, len); 
    60             rdlen = rdlen + len; 
    61         } 
    62       
    63         encStream.Close(); 
    64         fout.Close(); 
    65         fin.Close(); 
    66   
    67 }
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    print?
    01 using System;
    02 using System.Security.Cryptography;//这个是处理文字编码的前提
    03 using System.Text;
    04 using System.IO;
    05 /// <summary>
    06 /// DES加密方法
    07 /// </summary>
    08 /// <param name="strPlain">明文</param>
    09 /// <param name="strDESKey">密钥</param>
    10 /// <param name="strDESIV">向量</param>
    11 /// <returns>密文</returns>
    12 public string DESEncrypt(string strPlain,string strDESKey,string strDESIV)
    13 {
    14  //把密钥转换成字节数组
    15  byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
    16  //把向量转换成字节数组
    17  byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
    18  //声明1个新的DES对象
    19  DESCryptoServiceProvider desEncrypt=new DESCryptoServiceProvider();
    20  //开辟一块内存流
    21  MemoryStream msEncrypt=new MemoryStream();
    22  //把内存流对象包装成加密流对象
    23  CryptoStream csEncrypt=new CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write);
    24  //把加密流对象包装成写入流对象
    25  StreamWriter swEncrypt=new StreamWriter(csEncrypt);
    26  //写入流对象写入明文
    27  swEncrypt.WriteLine(strPlain);
    28  //写入流关闭
    29  swEncrypt.Close();
    30  //加密流关闭
    31  csEncrypt.Close();
    32  //把内存流转换成字节数组，内存流现在已经是密文了
    33  byte[] bytesCipher=msEncrypt.ToArray();
    34  //内存流关闭
    35  msEncrypt.Close();
    36  //把密文字节数组转换为字符串，并返回
    37  return UnicodeEncoding.Unicode.GetString(bytesCipher);
    38 }
    39   
    40   
    41   
    42   
    43 /// <summary>
    44 /// DES解密方法
    45 /// </summary>
    46 /// <param name="strCipher">密文</param>
    47 /// <param name="strDESKey">密钥</param>
    48 /// <param name="strDESIV">向量</param>
    49 /// <returns>明文</returns>
    50 public string DESDecrypt(string strCipher,string strDESKey,string strDESIV)
    51 {
    52  //把密钥转换成字节数组
    53  byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
    54  //把向量转换成字节数组
    55  byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
    56  //把密文转换成字节数组
    57  byte[] bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher);
    58  //声明1个新的DES对象
    59  DESCryptoServiceProvider desDecrypt=new DESCryptoServiceProvider();
    60  //开辟一块内存流，并存放密文字节数组
    61  MemoryStream msDecrypt=new MemoryStream(bytesCipher);
    62  //把内存流对象包装成解密流对象
    63  CryptoStream csDecrypt=new CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read);
    64  //把解密流对象包装成读出流对象
    65  StreamReader srDecrypt=new StreamReader(csDecrypt);
    66  //明文=读出流的读出内容
    67  string strPlainText=srDecrypt.ReadLine();
    68  //读出流关闭
    69  srDecrypt.Close();
    70  //解密流关闭
    71  csDecrypt.Close();
    72  //内存流关闭
    73  msDecrypt.Close();
    74  //返回明文
    75  return strPlainText;
    76 }
    \
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  • 原文地址：https://www.cnblogs.com/skyshenwei/p/1677064.html
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