Aes.Encrypt

Question

Hi I have below code . I want to encrypt parameters with Aes.encrypt ' runat="server">Item Thanks

Sachin Singh · Answer

Create an extension method as public static Common { public static byte[] EncryptAES( this string, string str) { using (AesManaged aes = new AesManaged()) { byte[] encrypted = Encrypt(str, aes.Key, aes.IV); return encrypted; } return new byte[]; } public static string DecryptAES( this byte[], byte arr) { using (AesManaged aes = new AesManaged()) { string decrypted = Decrypt(arr, aes.Key, aes.IV); return decrypted ; } return null; } } static byte[] Encrypt(string plainText, byte[] Key, byte[] IV) { byte[] encrypted; // Create a new AesManaged. using (AesManaged aes = new AesManaged()) { // Create encryptor ICryptoTransform encryptor = aes.CreateEncryptor(Key, IV); // Create MemoryStream using (MemoryStream ms = new MemoryStream()) { // Create crypto stream using the CryptoStream class. This class is the key to encryption // and encrypts and decrypts data from any given stream. In this case, we will pass a memory stream // to encrypt using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write)) { // Create StreamWriter and write data to a stream using (StreamWriter sw = new StreamWriter(cs)) sw.Write(plainText); encrypted = ms.ToArray(); } } } // Return encrypted data return encrypted; } static string Decrypt(byte[] cipherText, byte[] Key, byte[] IV) { string plaintext = null; // Create AesManaged using (AesManaged aes = new AesManaged()) { // Create a decryptor ICryptoTransform decryptor = aes.CreateDecryptor(Key, IV); // Create the streams used for decryption. using (MemoryStream ms = new MemoryStream(cipherText)) { // Create crypto stream using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read)) { // Read crypto stream using (StreamReader reader = new StreamReader(cs)) plaintext = reader.ReadToEnd(); } } } return plaintext; } use it as "lnkRating" PostBackUrl= ' ' runat= "server" >Item Note:- add using statement of your Extension method in the code behind of above aspx. and in student.aspx.cs void PageLoad() { var id=Request.QueryString[ "id" ].DecryptAES(); var val=Request.QueryString[ "v al" ].DecryptAES(); }