public void CanEncryptAndDecryptMessage()
{
byte[] encryptedData = provider.Encrypt(plaintext);
byte[] decryptedData = provider.Decrypt(encryptedData);
AssertHelpers.AssertArraysEqual(plaintext, decryptedData);
}
public void TripleDESEncryptAndDecrypt()
{
SymmetricAlgorithmProvider provider = new SymmetricAlgorithmProvider(TripleDESCryptoServiceProvider.Create(), key);
byte[] plaintext = new byte[] { 5, 4, 3, 2 };
byte[] ciphertext = provider.Encrypt(plaintext);
byte[] plaintext2 = provider.Decrypt(ciphertext);
Assert.IsFalse(CommonUtil.CompareBytes(plaintext, ciphertext));
Assert.IsTrue(CommonUtil.CompareBytes(plaintext, plaintext2));
}
public void AESEncryptAndDecryptWithBadKey()
{
SymmetricAlgorithmProvider provider = new SymmetricAlgorithmProvider(key);
byte[] plaintext = new byte[] { 5, 4, 6, 2 };
byte[] ciphertext = provider.Encrypt(plaintext);
SymmetricAlgorithmProvider badProvider = new SymmetricAlgorithmProvider(new byte[] { 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
try
{
byte[] plaintext2 = badProvider.Decrypt(ciphertext);
Assert.IsFalse(CommonUtil.CompareBytes(plaintext, plaintext2));
}
catch (CryptographicException)
{
}
}
/// <summary>
/// Desencripta una cadena de caracteres.-
/// </summary>
/// <param name="val">Cadena encriptada</param>
/// <returns>Cadena desencriptada</returns>
public string Dencrypt(string val)
{
CreateSymmetricAlgorithmProvider();
byte[] cryptedBin = Convert.FromBase64String(val);
try
{
return(Encoding.UTF8.GetString(_SymmetricAlgorithmProvider.Decrypt(cryptedBin)));
}
catch (CryptographicException)
{
TechnicalException te = new TechnicalException("Clave de encriptacion no es la correcta ");
ExceptionHelper.SetTechnicalException <SymetriCypher <T> >(te);
te.ErrorId = "4402";
throw te;
}
catch (Exception e)
{
TechnicalException te = new TechnicalException("Error al intentar desencriptar", e);
ExceptionHelper.SetTechnicalException <SymetriCypher <T> >(te);
te.ErrorId = "4402";
throw te;
}
}
public static string Desencriptar(string textoEncriptado)
{
string result = "";
try
{
string ruta = AppDomain.CurrentDomain.BaseDirectory + "\\" + ConfigurationManager.AppSettings["EntLibSymmProvider"];
ProtectedKey key = (ProtectedKey) new ManejadorArchivos().LeerKey(ruta);
SymmetricAlgorithmProvider provider = new SymmetricAlgorithmProvider(typeof(TripleDESCryptoServiceProvider), key);
result = UnicodeEncoding.Unicode.GetString(provider.Decrypt(Convert.FromBase64String(textoEncriptado)));
//ModifProtectedKeyFilename();
//var crypto = EnterpriseLibraryContainer.Current.GetInstance<CryptographyManager>();
//string clavesimetrica = GetSymmProvider();
//result = crypto.DecryptSymmetric(clavesimetrica, textoEncriptado);
}
catch (Exception ex)
{
throw ex;
}
return(result);
}
public void DecryptZeroBytes()
{
SymmetricAlgorithmProvider provider = new SymmetricAlgorithmProvider(key);
provider.Decrypt(new byte[0]);
}
public void DecryptNullBytes()
{
SymmetricAlgorithmProvider provider = new SymmetricAlgorithmProvider(key);
provider.Decrypt(null);
}
