/// <summary>
/// Formats a message so its easy to work with. Decrypts the message if the cipher is not null.
/// </summary>
/// <param name="messageIn">The message that will be converted to an instance of NetworkMessage</param>
/// <param name="cipher">The SymmetricCipher that will be used for decrypting the message</param>
/// <returns></returns>
private NetworkMessage GetNetworkMessage(string messageIn)
{
List <string> arguments = NetworkUtil.RemoveEscape(messageIn);
Console.WriteLine(messageIn);
if (cipher != null)
{
for (int i = 0; i < arguments.Count(); i++)
{
arguments[i] = cipher.Decrypt(arguments[i]);
}
}
if (arguments.Count() >= 2 && Enum.TryParse(arguments[0], out MessageProtocols protocol))
{
string message = arguments[1];
NetworkMessage networkMessage = new NetworkMessage()
{
Protocol = protocol,
Message = message
};
return(networkMessage);
}
return(null);
}
public static void TestSymmetricEncrypt1()
{
Console.WriteLine("TestSymmetric1");
var cipher = new SymmetricCipher(SymmetricAlgorithm.Des);
Console.WriteLine($"secretKey:{cipher.Base64SecretKey}");
var encrypted = cipher.Encrypt(Encoding.UTF8.GetBytes("对称加密测试1"));
Console.WriteLine($"encrypted:{Convert.ToBase64String(encrypted)}");
var decrypted = cipher.Decrypt(encrypted);
Console.WriteLine($"decrypted:{Encoding.UTF8.GetString(decrypted)}");
}
public static void TestSymmetricEncrypt2()
{
Console.WriteLine("TestSymmetric2");
var secretKey = Convert.FromBase64String("6V2SlGS25bw=");
var cipher = new SymmetricCipher(SymmetricAlgorithm.Des, secretKey);
var encrypted = cipher.Encrypt(Encoding.UTF8.GetBytes("对称加密测试2"));
Console.WriteLine($"encrypted:{Convert.ToBase64String(encrypted)}");
// encrypted = Convert.FromBase64String("uMi0zTne1HMv5sU1HB2WI/CsNvBUn5y3");
var decrypted = cipher.Decrypt(encrypted);
Console.WriteLine($"decrypted:{Encoding.UTF8.GetString(decrypted)}");
}
public bool DecryptAndCheckHash(uint hashDigestSize, uint decryptStartOffset, SymmetricCipher theCipher)
{
var bufferSize = GetBufferSize();
var buffer = GetBuffer();
if (bufferSize < decryptStartOffset + hashDigestSize)
{
return(false);
}
theCipher.Decrypt(buffer, decryptStartOffset, buffer, decryptStartOffset, bufferSize - decryptStartOffset);
var hash = new SHA256Managed().ComputeHash(buffer, 0, (int)(bufferSize - hashDigestSize));
var ret = Memcmp(buffer, bufferSize - hashDigestSize, hash, 0U, hashDigestSize);
if (ret)
{
Resize(bufferSize - hashDigestSize);
}
return(ret);
}
protected virtual void OnEncryptedMessageReceived(byte[] data)
{
data = SymmetricCipher.Decrypt(data);
OnDataReceived.Invoke(data);
}
public void BasicCipher_TrippleDESSimpleCryption_ShouldPass()
{
string plainText = "Encryption is pretty fun";
byte[] plainTextArr = Encoding.UTF8.GetBytes(plainText);
byte[] encryptArr;
byte[] decryptArr;
byte[] IV;
using (var cipher = new SymmetricCipher<TripleDESCryptoServiceProvider>("mypasswd2", "mysalt1337bb44"))
{
IV = cipher.IV;
encryptArr = cipher.Encrypt(plainText);
}
using (var cipher = new SymmetricCipher<TripleDESCryptoServiceProvider>("mypasswd2", "mysalt1337bb44", IV))
{
decryptArr = cipher.Decrypt(encryptArr);
}
CollectionAssert.AreEqual(plainTextArr, decryptArr);
}
public void BasicCipher_RijndaelSimpleCryption_ShouldPass()
{
string plainText = "Encryption is pretty fun";
string passwd = "mypasswd2";
string salt = "mysalt1337bb44";
byte[] plainTextArr = Encoding.UTF8.GetBytes(plainText);
byte[] encryptArr;
byte[] decryptArr;
byte[] IV;
using (var cipher = new SymmetricCipher<RijndaelManaged>(passwd, salt))
{
IV = cipher.IV;
encryptArr = cipher.Encrypt(plainText);
}
using (var cipher = new SymmetricCipher<RijndaelManaged>(passwd, salt, IV))
{
decryptArr = cipher.Decrypt(encryptArr);
}
CollectionAssert.AreEqual(plainTextArr, decryptArr);
}
public void AesBasicCipher_MultiInstance_WrongSaltFail()
{
string plainText = "Encryption is pretty fun";
byte[] plainTextArr = Encoding.UTF8.GetBytes(plainText);
byte[] encryptArr;
byte[] decryptArr;
using (var cipher = new SymmetricCipher<AesManaged>("mypasswd2", "mysalt1337bb44"))
{
encryptArr = cipher.Encrypt(plainText);
}
using (var cipher = new SymmetricCipher<AesManaged>("mypasswd2", "mysalt1337bb"))
{
decryptArr = cipher.Decrypt(encryptArr);
}
}
public void AesBasicCipher4_SameInstance_ComparesOutput()
{
string plainText = "Encryption is pretty fun";
byte[] plainTextArr = Encoding.UTF8.GetBytes(plainText);
string encryptStr;
byte[] decryptArr;
string decryptStr;
using (var cipher = new SymmetricCipher<AesManaged>("mypasswd2", "mysalt1337bb"))
{
encryptStr = cipher.EncryptToString(plainText);
decryptArr = cipher.Decrypt(encryptStr);
}
decryptStr = Encoding.UTF8.GetString(decryptArr);
Assert.AreEqual(plainText, decryptStr);
}
