public void Test_DecryptString_without_encryption_data_appended_without_associated_data()
{
string associatedData = null;
var appendEncryptionData = false;
var aesDecryptionResult = new AesDecryptionResult();
string errorMessage = "";
var aesEncryptionResult = _aes256gcm.EncryptString(_testString, _password, associatedData, appendEncryptionDataToOutput: appendEncryptionData);
if (aesEncryptionResult.Success)
{
aesDecryptionResult = _aes256gcm.DecryptString(aesEncryptionResult.EncryptedDataBytes, System.Text.Encoding.UTF8.GetBytes(_password), null, hasEncryptionDataAppendedInInput: appendEncryptionData,
aesEncryptionResult.Tag, aesEncryptionResult.Salt, aesEncryptionResult.Nonce);
if (!aesDecryptionResult.Success)
{
errorMessage = aesDecryptionResult.Message;
}
}
else
{
errorMessage = aesEncryptionResult.Message;
}
Assert.IsTrue((aesEncryptionResult.Success && aesDecryptionResult.Success && aesDecryptionResult.DecryptedDataString.Equals(_testString)), errorMessage);
}
/// <summary>
/// Encrypts an input byte array using AES with a 256 bits key in GCM authenticated mode.
/// </summary>
/// <param name="cipher">The byte array of the cipher to decrypt.</param>
/// <param name="key">The encryption key being used.</param>
/// <returns>The decrypted output string.</returns>
public static string Decrypt(byte[] cipher, byte[] key)
{
if (cipher == null)
{
throw new ArgumentNullException(nameof(cipher));
}
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
var aes = new AEAD_AES_256_GCM();
return(Encoding.UTF8.GetString(aes.DecryptString(cipher, key)));
}
/// <summary>
/// Decrypts an input string using AES with a 256 bits key in GCM authenticated mode.
/// </summary>
/// <param name="cipher">The base64 encoded input cipher to decrypt.</param>
/// <param name="key">The encryption key being used.</param>
/// <returns>The decrypted output string.</returns>
public static string Decrypt(string cipher, string key)
{
if (string.IsNullOrEmpty(cipher))
{
throw new ArgumentNullException(nameof(cipher));
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
var aes = new AEAD_AES_256_GCM();
return(Encoding.UTF8.GetString(aes.DecryptString(cipher, key)));
}
/// <summary>
/// Loads JSON configuration key/values from a stream into a provider.
/// </summary>
/// <param name="stream">The stream to read.</param>
public override void Load(Stream stream)
{
var source = (EncryptedJsonConfigurationSource)Source;
try
{
var encryptedSettings = stream.ToBytes();
var aes = new AEAD_AES_256_GCM();
var settings = aes.DecryptString(encryptedSettings, source.Key);
Data = EncryptedJsonConfigurationFileParser.Parse(new MemoryStream(settings));
}
catch (JsonException e)
{
throw new FormatException("Could not parse the encrypted JSON file", e);
}
}
/// <summary>
/// Loads JSON configuration key/values from a stream into a provider.
/// </summary>
public override void Load()
{
var source = (EncryptedJsonConfigurationSource)Source;
try
{
var text = Convert.FromBase64String(File.ReadAllText(source.Path));
var aes = new AEAD_AES_256_GCM();
var settings = aes.DecryptString(text, source.Key);
Data = EncryptedJsonConfigurationFileParser.Parse(new MemoryStream(settings));
}
catch (JsonException e)
{
throw new FormatException("Could not parse the encrypted JSON file", e);
}
}