数据加密之SymmetricAlgorithm加密

 1  #region SymmetricAlgorithm加密
 2         /// <summary>  
 3         /// 按指定对称算法、键和向量加密字符串  
 4         /// </summary>  
 5         public static byte[] Encrypt(string plainText, string algName, byte[] rgbKey, byte[] rgbIv)
 6         {
 7             var alg = SymmetricAlgorithm.Create(algName);
 8             var transform = alg.CreateEncryptor(rgbKey, rgbIv);
 9             var ms = new MemoryStream();
10             var encStream = new CryptoStream(ms, transform, CryptoStreamMode.Write);
11             var sw = new StreamWriter(encStream);
12             sw.WriteLine(plainText);
13             sw.Close();
14             encStream.Close();
15             var buffer = ms.ToArray();
16             ms.Close();
17             return buffer;
18         }
19         #endregion
20         #region SymmetricAlgorithm解密
21         /// <summary>  
22         /// 按指定对称算法、键和向量解密数据  
23         /// </summary>  
24         public static string Decrypt(byte[] cypherText, string algName, byte[] rgbKey, byte[] rgbIv)
25         {
26             var alg = SymmetricAlgorithm.Create(algName);
27             var transform = alg.CreateDecryptor(rgbKey, rgbIv);
28             var ms = new MemoryStream(cypherText);
29             var encStream = new CryptoStream(ms, transform, CryptoStreamMode.Read);
30             var sr = new StreamReader(encStream);
31             var val = sr.ReadLine();
32             sr.Close();
33             encStream.Close();
34             ms.Close();
35             return val;
36         }
37         #endregion