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    }

 

view sourceprint?

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    }

view sourceprint?

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    }

view sourceprint?

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    }

view sourceprint?

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    }

view sourceprint?

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}

 

view sourceprint?

01using System;

02using System.Security.Cryptography;//这个是处理文字编码的前提

03using System.Text;

04using 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>

12public 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>

50public 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}