ASP.NET AES 암호화 클래스

C#

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using System; using System.IO; using System.Security.Cryptography; using System.Text;   namespace ConsoleApp1 {     class Program     {         static void Main(string[] args)         {             // 클래스 호출             Security AES = new Security();             // 키32자리             string key = "12345678901234567890123456789012";               // 암호화 문자열             string str = "암호화할 문자열입니다.";             // 암호화된 문자열             string result1 = AES.AES_encrypt(str, key);               // 암호화된 문자열 출력             Console.WriteLine(result1);               // 복호화된 문자열             string result2 = AES.AES_decrypt(result1, key);             // 복호화된 문자열 출력             Console.WriteLine(result2);           }     }       public class Security     {         public string AES_encrypt(string input, string key)         {             RijndaelManaged aes = new RijndaelManaged();             aes.KeySize = 256;             aes.BlockSize = 128;             aes.Mode = CipherMode.CBC;             aes.Padding = PaddingMode.PKCS7;             aes.Key = Encoding.UTF8.GetBytes(key);             aes.IV = new Byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };             var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);             Byte[] xBuff = null;             using (MemoryStream ms = new MemoryStream())             {                 using (CryptoStream cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))                 {                     Byte[] xXml = Encoding.UTF8.GetBytes(input);                     cs.Write(xXml, 0, xXml.Length);                 }                 xBuff = ms.ToArray();             }             return Convert.ToBase64String(xBuff);         }           public string AES_decrypt(string input, string key)         {             if (input == "") { return ""; }             RijndaelManaged aes = new RijndaelManaged();             aes.KeySize = 256;             aes.BlockSize = 128;             aes.Mode = CipherMode.CBC;             aes.Padding = PaddingMode.PKCS7;             aes.Key = Encoding.UTF8.GetBytes(key);             aes.IV = new Byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };             var decrypt = aes.CreateDecryptor();             Byte[] xBuff = null;               using (MemoryStream ms = new MemoryStream())             {                 try                 {                     using (CryptoStream cs = new CryptoStream(ms, decrypt, CryptoStreamMode.Write))                     {                         Byte[] xXml = Convert.FromBase64String(input);                         cs.Write(xXml, 0, xXml.Length);                     }                 }                 catch                 {                     return "";                 }                 xBuff = ms.ToArray();             }             if (xBuff.Length > 0)             {                 string Output = Encoding.UTF8.GetString(xBuff);                 return Output.Trim();             }             else             {                 return "";             }         }     } }

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Visual Basic

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Imports System.IO Imports System.Security.Cryptography Imports System.Text   Module Module1       Sub Main()         '클래스 호출         Dim AES As Security = New Security()         '키32자리         Dim key As String = "12345678901234567890123456789012"           '암호화 문자열         Dim str As String = "암호화할 문자열입니다."           '암호화된 문자열         Dim result1 As String = AES.AES_encrypt(str, key)           '암호화된 문자열 출력         Console.WriteLine(result1)           '복호화된 문자열         Dim result2 As String = AES.AES_decrypt(result1, key)         '복호화된 문자열 출력         Console.WriteLine(result2)     End Sub       Private Class Security         Function AES_encrypt(ByVal input As String, ByVal key As String) As String             Dim aes As RijndaelManaged = New RijndaelManaged             aes.KeySize = 256             aes.BlockSize = 128             aes.Mode = CipherMode.CBC             aes.Padding = PaddingMode.PKCS7             aes.Key = Encoding.UTF8.GetBytes(key)             aes.IV = New Byte() {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}             Dim encrypt = aes.CreateEncryptor(aes.Key, aes.IV)             Dim xBuff As Byte() = Nothing             Using ms As MemoryStream = New MemoryStream()                 Using cs As CryptoStream = New CryptoStream(ms, encrypt, CryptoStreamMode.Write)                     Dim xXml As Byte() = Encoding.UTF8.GetBytes(input)                     cs.Write(xXml, 0, xXml.Length)                 End Using                 xBuff = ms.ToArray()             End Using             Dim Output As String = Convert.ToBase64String(xBuff)             Return Output         End Function           Function AES_decrypt(ByVal input As String, ByVal key As String) As String             If input = "" Then Return ""             Dim aes As RijndaelManaged = New RijndaelManaged             aes.KeySize = 256             aes.BlockSize = 128             aes.Mode = CipherMode.CBC             aes.Padding = PaddingMode.PKCS7             aes.Key = Encoding.UTF8.GetBytes(key)             aes.IV = New Byte() {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}             Dim decrypt = aes.CreateDecryptor()             Dim xBuff As Byte() = Nothing             Using ms As MemoryStream = New MemoryStream()                 Try                     Using cs As CryptoStream = New CryptoStream(ms, decrypt, CryptoStreamMode.Write)                         Dim xXml As Byte() = Convert.FromBase64String(input)                         cs.Write(xXml, 0, xXml.Length)                     End Using                 Catch ex As Exception                   End Try                 xBuff = ms.ToArray()             End Using             If IsDBNull(xBuff) Then                 Return ""             Else                 Dim Output As String = Encoding.UTF8.GetString(xBuff)                 Return Output.Trim()             End If         End Function     End Class End Module

약관동의(Javascript)

querySelectorAll 가 IE 8 부터 사용가능하기 때문에 8부터 적용가능

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<!DOCTYPE html> <html> <head>     <meta charset="utf-8" />     <title>약관동의</title>     <script type="text/javascript">         window.onload = function () {             var chks = document.querySelectorAll("input[name=chk]");             var cllchkbox = document.getElementById("allChk");             cllchkbox.onclick = function () {                 if (this.checked) {                     for (var i = 0; i < chks.length; i++) {                         chks[i].checked = true;                     }                 } else {                     for (var i = 0; i < chks.length; i++) {                         chks[i].checked = false;                     }                 }             }             function chkclick() {                 var chkarr = chks;                 var chkcnt = 0;                 for (var i = 0; i < chkarr.length; i++) {                     if (chkarr[i].checked) { chkcnt++; }                 }                 if (chkarr.length == chkcnt) {                     cllchkbox.checked = true;                 } else {                     cllchkbox.checked = false;                 }             }             for (var i = 0; i < chks.length; i++) {                 var elm = chks[i];                 elm.onclick = function () {                     chkclick();                 }             }         }     </script> </head> <body>     <form id="form1">         <label><input type="checkbox" id="allChk" />모든 약관동의</label>         <div>약관1</div>         <label><input type="checkbox" name="chk" /> 동의합니다.</label>         <div>약관2</div>         <label><input type="checkbox" name="chk" /> 동의합니다.</label>         <div>약관3</div>         <label><input type="checkbox" name="chk" /> 동의합니다.</label>     </form> </body> </html>