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C#加密算法汇总

2013年11月02日 ⁄ 综合 ⁄ 共 6418字 ⁄ 字号 小 中 大 ⁄ 评论关闭
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     }
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> 
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