C#
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp16
{
public class Program
{
public static void Main()
{
var plain = "Lorem Ipsum";
var encryptSettings = new EncryptSettings();
var encryptTools = new EncryptTools(encryptSettings);
var encrypted = encryptTools.AesEncrypt(plain);
Console.WriteLine("Encrypted");
Console.WriteLine(encrypted);
Console.WriteLine();
Console.WriteLine("Decrypted");
var text = encryptTools.AesDecrypt(encrypted);
Console.WriteLine(text);
}
}
public class EncryptSettings
{
public string Key { get; set; }
public EncryptSettings()
{
Key = "passwordstring";
}
}
public class EncryptTools
{
private readonly EncryptSettings encryptSettings;
public EncryptTools(EncryptSettings encryptSettings)
{
this.encryptSettings = encryptSettings;
}
private byte[] key => Sha256Byte(encryptSettings.Key);
private byte[] iv => new byte[16] { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
public string AesEncrypt(string plainText)
{
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (key == null || key.Length <= 0)
throw new ArgumentNullException("Key");
if (iv == null || iv.Length <= 0)
throw new ArgumentNullException("IV");
byte[] encrypted;
using (var aes = Aes.Create())
{
aes.Mode = CipherMode.CBC;
aes.Key = key;
aes.IV = iv;
using (var ms = new MemoryStream())
{
using (ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV))
using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
using (StreamWriter swEncrypt = new StreamWriter(cs))
{
swEncrypt.Write(plainText);
}
encrypted = ms.ToArray();
}
}
return Convert.ToBase64String(encrypted);
}
public string AesDecrypt(string encryptedText)
{
var cipherText = Convert.FromBase64String(encryptedText);
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (key == null || key.Length <= 0)
throw new ArgumentNullException("Key");
if (iv == null || iv.Length <= 0)
throw new ArgumentNullException("IV");
string plaintext = null;
using (Aes aes = Aes.Create())
{
aes.Mode = CipherMode.CBC;
aes.Key = key;
aes.IV = iv;
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
using (ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV))
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
plaintext = srDecrypt.ReadToEnd();
}
}
return plaintext;
}
public byte[] Sha256Byte(string plainText)
{
byte[] bytes = null;
using (SHA256 sha256Hash = SHA256.Create())
{
bytes = sha256Hash.ComputeHash(Encoding.ASCII.GetBytes(plainText));
}
return bytes;
}
}
}
