DES加密解密工具类

 1 /// <summary>
 2 /// DES加密解密工具类
 3 /// </summary>
 4 public class DesUtil
 5 {
 6     /// <summary>
 7     /// 秘钥
 8     /// </summary>
 9     private static string g_Key = "D228E0B3";
10 
11     /// <summary>
12     /// DES加密解密方法
13     /// </summary>
14     /// <param name="_String">加密解密字符串</param>
15     /// <param name="_Type">0：加密，1：解密</param>
16     /// <param name="_Key">Ksy</param>
17     /// <returns></returns>
18     public static bool DesFunction(ref string _String, E_Cipher _Type, params string[] _Key)
19     {
20         bool result = false;
21         if (_Key.Length != 0)
22             g_Key = _Key[0];
23 
24         switch (_Type)
25         {
26             case E_Cipher.Encrypt:
27                 result = DesEncrypt(ref _String, g_Key);
28                 break;
29             case E_Cipher.Decrypt:
30                 result = DesDecrypt(ref _String, g_Key);
31                 break;
32         }
33         return result;
34     }
35 
36     /// <summary>
37     /// DES加密
38     /// </summary>
39     /// <param name="encryptString">需要加密的字符串</param>
40     /// <returns>加密后的字符串</returns>
41     private static bool DesEncrypt(ref string encryptString, string key)
42     {
43         try
44         {
45             byte[] keyBytes = Encoding.UTF8.GetBytes(key);
46             byte[] keyIV = keyBytes;
47             byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
48             DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
49             //直接加密
50             byte[] encrypted = provider.CreateEncryptor(keyBytes, keyIV).TransformFinalBlock(inputByteArray, 0, inputByteArray.Length);
51             encryptString = Convert.ToBase64String(encrypted);
52             return true;
53         }
54         catch (Exception _ex)
55         {
56             return false;
57         }
58     }
59 
60     /// <summary>
61     /// DES解密
62     /// </summary>
63     /// <param name="decryptString">需要解密的字符串</param>
64     /// <returns>解密后的字符串</returns>
65     private static bool DesDecrypt(ref string decryptString, string key)
66     {
67         try
68         {
69             byte[] keyBytes = Encoding.UTF8.GetBytes(key);
70             byte[] keyIV = keyBytes;
71             byte[] inputByteArray = Convert.FromBase64String(decryptString);
72             DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
73             //直接解密
74             byte[] outputdata = provider.CreateDecryptor(keyBytes, keyIV).TransformFinalBlock(inputByteArray, 0, inputByteArray.Length);
75             decryptString = Encoding.UTF8.GetString(outputdata, 0, outputdata.Length);
76             return true;
77         }
78         catch (Exception _ex)
79         {
80             return false;
81         }
82     }
83 }

 1 /// <summary>
 2 /// 枚举类型
 3 /// </summary>
 4 public enum E_Cipher
 5 {
 6     /// <summary>
 7     /// 加密
 8     /// </summary>
 9     Encrypt = 0,
10     /// <summary>
11     /// 解密
12     /// </summary>
13     Decrypt = 1
14 }

　　调用方式

/// <summary>
/// 加密解密方法
/// </summary>
public void DESEncryption()
{
    string str = "12345";
    bool result;
    //加密操作
    result = DesUtil.DesFunction(ref str, E_Cipher.Encrypt);
    if (result)
        Console.WriteLine(str);
    //解密操作
    result = DesUtil.DesFunction(ref str, E_Cipher.Decrypt);
    if (result)
        Console.WriteLine(str);
}