How do you encrypt and decrypt data using ASP.NET?

Question

Gulshan Negi · Answer

Well, you can use the below code to encrypt data using ASP.NET.

using System;
using System.Security.Cryptography;
using System.Text;

public class EncryptionHelper
{
public static string Encrypt(string plainText, string key, string iv)
{
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = Encoding.UTF8.GetBytes(iv);

ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
}
return Convert.ToBase64String(msEncrypt.ToArray());
}
}
}
}

Well, if you are looking to decrypt data using ASP.NET, then you can use the below code:

using System;
using System.Security.Cryptography;
using System.Text;

public class EncryptionHelper
{
public static string Decrypt(string cipherText, string key, string iv)
{
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = Encoding.UTF8.GetBytes(iv);

ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

using (MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(cipherText)))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
return srDecrypt.ReadToEnd();
}
}
}
}
}
}

Thanks

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