public string Encrypt <T>(string keyString, T value)
{
if (string.IsNullOrWhiteSpace(keyString))
{
throw new ArgumentNullException(nameof(keyString));
}
string plainText = HelperFunc.ChangeType <string>(value);
if (string.IsNullOrWhiteSpace(plainText))
{
throw new ArgumentNullException(nameof(value));
}
// Create an Aes object with the specified key
using Aes aesAlg = Aes.Create();
aesAlg.Key = Encoding.UTF8.GetBytes(keyString);
// Create an encryptor to perform the stream transform.
using ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using MemoryStream msEncrypt = new MemoryStream();
using CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
byte[] encryptedContent = msEncrypt.ToArray();
byte[] result = new byte[aesAlg.IV.Length + encryptedContent.Length];
Buffer.BlockCopy(aesAlg.IV, 0, result, 0, aesAlg.IV.Length);
Buffer.BlockCopy(encryptedContent, 0, result, aesAlg.IV.Length, encryptedContent.Length);
return(Convert.ToBase64String(result));
}
public T Decrypt <T>(string keyString, string cipherText)
{
if (string.IsNullOrWhiteSpace(keyString))
{
throw new ArgumentNullException(nameof(keyString));
}
if (string.IsNullOrWhiteSpace(cipherText))
{
throw new ArgumentNullException(nameof(cipherText));
}
byte[] fullCipher = Convert.FromBase64String(cipherText);
var iv = new byte[16];
var cipher = new byte[fullCipher.Length - iv.Length];
Buffer.BlockCopy(fullCipher, 0, iv, 0, iv.Length);
Buffer.BlockCopy(fullCipher, iv.Length, cipher, 0, fullCipher.Length - iv.Length);
var key = Encoding.UTF8.GetBytes(keyString);
// Create an Aes object with the specified key
using Aes aesAlg = Aes.Create();
aesAlg.Key = Encoding.UTF8.GetBytes(keyString);
// Create a decryptor to perform the stream transform.
using ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, iv);
string plainText;
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipher))
{
using CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
using StreamReader srDecrypt = new StreamReader(csDecrypt);
plainText = srDecrypt.ReadToEnd();
}
//Return Plain Text
return(HelperFunc.ChangeType <T>(plainText));
}
