private async Task Then_data_is_correctly_decrypted()
{
var decryptTask = DecryptAsync(_encryptedData);
var controlTask = _algorithm.DecryptAsync(_encryptedData);
var decrypted = await decryptTask;
var control = await controlTask;
Assert.NotNull(decrypted);
// NOTE: Cannot use xunit's Assert.Equal here because for some reason it is glacially slow with large data sets.
Assert.True(SequencesAreEqual(control, decrypted), "Decrypted sequence does not match the control sequence");
}
/// <summary>
/// Decrypts a string that was encrypted using the same password, salt and <see cref="SymmetricAlgorithm"/> that created it
/// </summary>
/// <param name="algorithm">The SymmetricAlgorithm to encrypt with</param>
/// <param name="text">The text that you want to decrypt</param>
/// <param name="encryptionKey">The password that is used with the salt to encrypt/decrypt the text</param>
/// <param name="salt">A value to make the text being encrypted unique to a same text being encrypted elsewhere (basically a prefix added to the text prior to encryption). A salt should be unique to each stored encrypted value and saved elsewhere.</param>
/// <param name="iterations">Is the number of times the encryption is performed</param>
public static Task <string> DecryptAsync(this SymmetricAlgorithm algorithm, string text, string encryptionKey, string salt, int iterations = DEFAULT_ITERATIONS)
{
Assert.NotNullOrEmpty(salt, nameof(salt));
return(algorithm.DecryptAsync(text, encryptionKey, Encoding.Unicode.GetBytes(salt), iterations));
}