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#region Disclaimer / License
// Copyright (C) 2015, The Duplicati Team
// http://www.duplicati.com, info@duplicati.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#endregion
using System;
using System.Collections.Generic;
using System.Text;
namespace Duplicati.Library.Modules.Builtin
{
public class ConsolePasswordInput : Duplicati.Library.Interface.IGenericModule
{
/// <summary>
/// These actions only use the local database and do not require access to the data inside the files.
/// For List and ListChanges this may not be true if there is no local database
/// </summary>
private readonly static string[] PASSPHRASELESS_ACTIONS = { "CreateLogDb", "TestFilters", "ListAffected", "SystemInfo", "SendMail" };
#region IGenericModule Members
public string Key { get { return "console-password-input"; } }
public string DisplayName { get { return Strings.ConsolePasswordInput.Displayname; } }
public string Description { get { return Strings.ConsolePasswordInput.Description; } }
public bool LoadAsDefault { get { return true; } }
public IList<Duplicati.Library.Interface.ICommandLineArgument> SupportedCommands { get { return null; } }
public void Configure(IDictionary<string, string> commandlineOptions)
{
//Ensure the setup is valid, could throw an exception
if (!commandlineOptions.ContainsKey("main-action"))
return;
//First see if a password is actually required for the action
foreach (string s in PASSPHRASELESS_ACTIONS)
if (string.Equals(s, commandlineOptions["main-action"], StringComparison.OrdinalIgnoreCase))
return;
//See if a password is already present or encryption is disabled
if (!commandlineOptions.ContainsKey("passphrase") && !Duplicati.Library.Utility.Utility.ParseBoolOption(commandlineOptions, "no-encryption"))
{
//Get the passphrase
bool confirm = string.Equals(commandlineOptions["main-action"], "backup", StringComparison.OrdinalIgnoreCase);
commandlineOptions["passphrase"] = ReadPassphraseFromConsole(confirm);
}
}
#endregion
private static string ReadPassphraseFromConsole(bool confirm)
{
Console.Write("\n" + Strings.ConsolePasswordInput.EnterPassphrasePrompt + ": ");
StringBuilder passphrase = new StringBuilder();
while (true)
{
ConsoleKeyInfo k = Console.ReadKey(true);
if (k.Key == ConsoleKey.Enter)
break;
if (k.Key == ConsoleKey.Escape)
throw new Library.Interface.CancelException("");
if (k.KeyChar != '\0') passphrase.Append(k.KeyChar);
//Unix/Linux user know that there is no feedback, Win user gets scared :)
if (System.Environment.OSVersion.Platform != PlatformID.Unix)
Console.Write("*");
}
Console.WriteLine();
if (confirm)
{
Console.Write("\n" + Strings.ConsolePasswordInput.ConfirmPassphrasePrompt + ": ");
StringBuilder password2 = new StringBuilder();
while (true)
{
ConsoleKeyInfo k = Console.ReadKey(true);
if (k.Key == ConsoleKey.Enter)
break;
if (k.Key == ConsoleKey.Escape)
return null;
password2.Append(k.KeyChar);
//Unix/Linux user know that there is no feedback, Win user gets scared :)
if (System.Environment.OSVersion.Platform != PlatformID.Unix)
Console.Write("*");
}
Console.WriteLine();
if (passphrase.ToString() != password2.ToString())
throw new Duplicati.Library.Interface.UserInformationException(Strings.ConsolePasswordInput.PassphraseMismatchError);
}
if (passphrase.ToString().Length == 0)
throw new Duplicati.Library.Interface.UserInformationException(Strings.ConsolePasswordInput.EmptyPassphraseError);
return passphrase.ToString();
}
}
}
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