C#加密算法总结

 1         /// <summary>
 2         /// MD5加密
 3         </summary>
 4         <param name="strPwd">原字符串</param>
 5         <returns>加密后字符串</returns>
 6         public static string GetMD5(string strPwd)
 7         {
 8             //MD5 对象创建的两种方式
 9             MD5 md5 = MD5.Create();
10             MD5 md5 = new MD5CryptoServiceProvider();
11             将输入的密码转换成字节数组
12             byte[] bPwd = Encoding.UTF8.GetBytes(strPwd);    
13             计算指定字节数组的哈希值
14             byte[] bMD5 = md5.ComputeHash(bPwd);
15             释放加密服务提供类的所有资源
16             md5.Clear();   
17             StringBuilder sbMD5Pwd =  StringBuilder();
18             for (int i = 0; i < bMD5.Length; i++)
19             {
20                 将每个字节数据转换为2位的16进制的字符
21                 sbMD5Pwd.Append(bMD5[i].ToString("x2"));
22             }
23             return sbMD5Pwd.ToString();
24         }

 使用 SHA1 加密算法来加密
<param name="sourceString">string SHA1_Encrypt( sourceString)
byte[] StrRes = Encoding.UTF8.GetBytes(sourceString);
 9             HashAlgorithm iSHA =  SHA1CryptoServiceProvider();
10             StrRes = iSHA.ComputeHash(StrRes);
11             StringBuilder EnText = foreach (byte iByte in StrRes)
13 14                 EnText.AppendFormat({0:x2},iByte);
15 16              EnText.ToString();
17         }

 SHA256 加密
string SHA256_Encrypt(byte[] data = 9             SHA256 shaM = SHA256.Create();
10             byte[] result = shaM.ComputeHash(data);
 result)
17         }

 SHA384 加密
string SHA384_Encrypt( 9             SHA384 shaM = SHA384.Create();
17         }

 SHA512_加密
string SHA512_Encrypt( 9             SHA512 shaM =  SHA512Managed();
17         }

 AES加密
<param name="encryptStr">加密字符串<param name="encryptKey">密钥 6         密码 7         string AESEncrypt(string encryptStr, encryptKey)
 8 if (.IsNullOrWhiteSpace(encryptStr))
10                 return .Empty;
11 
12             encryptKey = StringHelper.SubString(encryptKey,32);
13             encryptKey = encryptKey.PadRight(32,1)">' '14 
分组加密算法
16             SymmetricAlgorithm des = Rijndael.Create();
17             byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptStr);得到需要加密的字节数组 
设置密钥及密钥向量
19             des.Key = Encoding.UTF8.GetBytes(encryptKey);
20             des.IV = _aeskeys;
21             byte[] cipherBytes = null;
22             using (MemoryStream ms =  MemoryStream())
23 24                 using (CryptoStream cs =  CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write))
25                 {
26                     cs.Write(inputByteArray,1)">027                     cs.FlushFinalBlock();
28                     cipherBytes = ms.ToArray();得到加密后的字节数组
29                     cs.Close();
30                     ms.Close();
31                 }
32 33              Convert.ToBase64String(cipherBytes);
34         }
35 
36         37          AES解密
38         39         <param name="decryptStr">解密字符串40         <param name="decryptKey">41         原码42         string AESDecrypt(string decryptStr,1)"> decryptKey)
43 44             .IsNullOrWhiteSpace(decryptStr))
45                 46 
47             decryptKey = StringHelper.SubString(decryptKey,1)">48             decryptKey = decryptKey.PadRight(49 
50             byte[] cipherText = Convert.FromBase64String(decryptStr);
51 
52             SymmetricAlgorithm des =53             des.Key = Encoding.UTF8.GetBytes(decryptKey);
54             des.IV =55             byte[] decryptBytes = new byte[cipherText.Length];
56              MemoryStream(cipherText))
57 58                 59 60                     cs.Read(decryptBytes,decryptBytes.Length);
61 62 63 64 65             return Encoding.UTF8.GetString(decryptBytes).Replace(",1)">"");将字符串后尾的''去掉
66         }

 DES加密字符串
<param name="encryptString">待加密的字符串加密密钥,要求为8位加密成功返回加密后的字符串，失败返回源串string EncryptDES(string encryptString,1)">try
10 11                 byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0,1)">812                 byte[] rgbIV = Keys;
13                 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
14                 DESCryptoServiceProvider dCSP =  DESCryptoServiceProvider();
15                 MemoryStream mStream =  MemoryStream();
16                 CryptoStream cStream =  CryptoStream(mStream,dCSP.CreateEncryptor(rgbKey,rgbIV),CryptoStreamMode.Write);
17                 cStream.Write(inputByteArray,1)">18                 cStream.FlushFinalBlock();
19                  Convert.ToBase64String(mStream.ToArray());
20 catch
23                  encryptString;
24 26 
27         28          DES解密字符串
29         30         <param name="decryptString">待解密的字符串31         解密密钥,要求为8位,和加密密钥相同32         解密成功返回解密后的字符串，失败返源串33         string DecryptDES(string decryptString,1)">35             36 37                 byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(38                 39                  Convert.FromBase64String(decryptString);
40                 DESCryptoServiceProvider DCSP = 41                 MemoryStream mStream = 42                 CryptoStream cStream = 43                 cStream.Write(inputByteArray,1)">44  Encoding.UTF8.GetString(mStream.ToArray());
46 47             48 49                  decryptString;
50 51         }