AES256加密解密

加密解密方法：

 1 public class AES256Cipher
 2     {
 3         public String AES_encrypt(String Input, String key)
 4         {
 5             RijndaelManaged aes = new RijndaelManaged();
 6             aes.KeySize = 256;
 7             aes.BlockSize = 128;
 8             aes.Mode = CipherMode.CBC;
 9             aes.Padding = PaddingMode.PKCS7;
10             //MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
11             //byte[] tdesKey = hashmd5.ComputeHash(Encoding.UTF8.GetBytes(key));
12             aes.Key = Encoding.UTF8.GetBytes(key); //tdesKey;
13             aes.IV = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
14 
15             var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);
16             byte[] xBuff = null;
17             using (var ms = new MemoryStream())
18             {
19                 using (var cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))
20                 {
21                     byte[] xXml = Encoding.UTF8.GetBytes(Input);
22                     cs.Write(xXml, 0, xXml.Length);
23                 }
24 
25                 xBuff = ms.ToArray();
26             }
27 
28             String Output = Convert.ToBase64String(xBuff);
29             return Output;
30         }
31 
32         public String AES_decrypt(String Input, String key)
33         {
34             RijndaelManaged aes = new RijndaelManaged();
35             aes.KeySize = 256;
36             aes.BlockSize = 128;
37             aes.Mode = CipherMode.CBC;
38             aes.Padding = PaddingMode.PKCS7;
39             //MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
40             //byte[] tdesKey = hashmd5.ComputeHash(Encoding.UTF8.GetBytes(key));
41             aes.Key = Encoding.UTF8.GetBytes(key);
42             aes.IV = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
43 
44             var decrypt = aes.CreateDecryptor();
45             byte[] xBuff = null;
46             using (var ms = new MemoryStream())
47             {
48                 using (var cs = new CryptoStream(ms, decrypt, CryptoStreamMode.Write))
49                 {
50                     byte[] xXml = Convert.FromBase64String(Input);
51                     cs.Write(xXml, 0, xXml.Length);
52                 }
53 
54                 xBuff = ms.ToArray();
55             }
56 
57             String Output = Encoding.UTF8.GetString(xBuff);
58             return Output;
59         }
60     }

后台调用：

public JsonResult AES_encrypt(string inputStr)
        {

            AES256Cipher aes = new AES256Cipher();
            string encode = aes.AES_encrypt(inputStr, key);
            return Json(encode);
        }

        public JsonResult AES_decrypt(string inputStr)
        {
            AES256Cipher aes = new AES256Cipher();
            string decode = aes.AES_decrypt(inputStr, key);
            return Json(decode);
        }

前端页面：

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>AES256</title>
    <script src="~/Scripts/jquery-1.10.2.min.js"></script>
</head>
<body>
    <div> 
        输入字符：<input type="text" value="" id="inputStr" />
        <input type="button" value="加密" id="encrypt" />
        <input type="button" value="解密" id="decrypt" />
        <textarea id="txtarea"></textarea>
    </div>
    <script type="text/javascript">
        $(function () {
            $("#encrypt").click(function () {
                $.ajax({
                    type: "POST",
                    url: "/Home/AES_encrypt",   
                    data: { "inputStr": $("#inputStr").val() },  
                    dataType: "json",
                    success: function (data) {
                        $("#txtarea").text(data);
                    },
                    error: function (json) {
                        alert("数据错误");
                    }
                });  
            });

            $("#decrypt").click(function () {
                $.ajax({
                    type: "POST",
                    url: "/Home/AES_decrypt",
                    data: { "inputStr": $("#inputStr").val() },  
                    dataType: "json",
                    //async: false,
                    success: function (data) {
                        $("#txtarea").text(data);
                    }
                });
            });
        });
    </script>
</body>
</html>

加密界面如图：

解密界面如图：