kenneth.skovhede@gmail.com
effdba0558
Status: Fixed I have now implemented a password protection control. You can now only view passwords when you enter them. After this, you may reset the passwords, by entering a new one, but you cannot read the existing passwords. To protect against people reading the database, which contains the passwords in clear text, the database is now encrypted by using the standard SQLite encryption method. This is different than what I proposed, but is a much stronger protection than merely scrambling the passwords, and also protects all information (servername, etc). It works by setting an environment variable called DUPLICATI_DB_KEY. When no password is set, Duplicati will use the key "Duplicati_Key_42", ensuring that all databases are encrypted by default. Using a pre-defined publicly known key is obviously not a strong protection, but it protects from casual users attempting to browse the database, and it also protects from string scanners that scan a harddisk for possible passwords. On the first startup, Duplicati will encrypt the database, using the mentioned key. You may want to delete any backup databases that are placed in the same folder as the database. Should you wish to decrypt the database, you can start Duplicati.exe with the commandline option "--unencrypted-database". This will use the current key to decrypt the database, and save it without encryption. Should you wish to change the database password, simply decrypt the database, then change the password via the environment variable, and start Duplicati.exe as normal. The SQLite documentation for the feature is here: http://www.hwaci.com/sw/sqlite/see.html Unfortunately, it does not seem as if any of the free SQLite tools supports this. The SQLite library found on Ubuntu does not support encryption, so I have disabled this feature by default on Linux. If a user has a special compiled version of SQLite, they may use the environment variables as mentioned above. I will write this information into a wiki page as soon asap. git-svn-id: https://duplicati.googlecode.com/svn/trunk@498 59da171f-624f-0410-aa54-27559c288bec
402 lines
16 KiB
C#
402 lines
16 KiB
C#
#region Disclaimer / License
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// Copyright (C) 2010, Kenneth Skovhede
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// http://www.hexad.dk, opensource@hexad.dk
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Text;
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using System.Windows.Forms;
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namespace Duplicati.Library.Backend
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{
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public partial class SSHUI : UserControl
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{
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private const string USERNAME = "Username";
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private const string PASSWORD = "Password";
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private const string HOST = "Host";
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private const string FOLDER = "Folder";
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private const string PASWORDLESS = "Passwordless";
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private const string PORT = "Port";
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private const string DEBUG_ENABLED = "Debug enabled";
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private const string USE_UNMANAGED_SSH = "Use Unmanaged SSH";
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private const string HAS_WARNED_PATH = "UI: Has warned path";
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private const string HAS_TESTED = "UI: Has tested";
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private const string HAS_WARNED_NO_SFTP = "UI: Has warned SFTP";
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private bool m_warnedPath = false;
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private bool m_hasTested = false;
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private bool m_warnedNoSFTP = false;
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private IDictionary<string, string> m_options;
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private IDictionary<string, string> m_applicationSettings;
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public SSHUI(IDictionary<string, string> applicationSettings, IDictionary<string, string> options)
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: this()
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{
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m_applicationSettings = applicationSettings;
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m_options = options;
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}
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private SSHUI()
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{
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InitializeComponent();
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}
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internal bool Save(bool validate)
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{
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Save();
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if (!validate)
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return true;
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if (!ValidateForm())
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return false;
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if (!m_hasTested)
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switch (MessageBox.Show(this, Interface.CommonStrings.ConfirmTestConnectionQuestion, Application.ProductName, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question))
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{
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case DialogResult.Yes:
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TestConnection_Click(null, null);
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if (!m_hasTested)
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return false;
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break;
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case DialogResult.No:
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break;
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default: //Cancel
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return false;
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}
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Save();
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return true;
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}
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private void Save()
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{
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m_options[HAS_TESTED] = m_hasTested.ToString();
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m_options[HAS_WARNED_PATH] = m_warnedPath.ToString();
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m_options[HAS_WARNED_NO_SFTP] = m_warnedNoSFTP.ToString();
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m_options[PASWORDLESS]= (!UsePassword.Checked).ToString();
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m_options[PASSWORD] = UsePassword.Checked ? Password.Text : "";
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m_options[PORT] = ((int)Port.Value).ToString();
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m_options[HOST] = Servername.Text;
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m_options[FOLDER] = Path.Text;
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m_options[USERNAME] = Username.Text;
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m_options[DEBUG_ENABLED] = GenerateDebugOutput.Checked.ToString();
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m_options[USE_UNMANAGED_SSH] = UseUnmanagedSSH.Checked.ToString();
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}
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void SSHUI_PageLoad(object sender, EventArgs args)
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{
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bool passwordless;
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bool debug;
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bool useUnmanaged;
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int port;
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if (!m_options.ContainsKey(PASWORDLESS) || !bool.TryParse(m_options[PASWORDLESS], out passwordless))
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passwordless = false;
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if (!m_options.ContainsKey(PORT) || !int.TryParse(m_options[PORT], out port) || port < 0)
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port = 22;
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if (!m_options.ContainsKey(DEBUG_ENABLED) || !bool.TryParse(m_options[DEBUG_ENABLED], out debug))
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debug = false;
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if (!m_options.ContainsKey(USE_UNMANAGED_SSH) || !bool.TryParse(m_options[USE_UNMANAGED_SSH], out useUnmanaged))
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{
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useUnmanaged = false;
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if (m_applicationSettings.ContainsKey(SSHCommonOptions.DEFAULT_MANAGED))
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useUnmanaged = !Core.Utility.ParseBool(m_applicationSettings[SSHCommonOptions.DEFAULT_MANAGED], true);
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}
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if (m_options.ContainsKey(HOST))
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Servername.Text = m_options[HOST];
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if (m_options.ContainsKey(FOLDER))
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Path.Text = m_options[FOLDER];
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if (m_options.ContainsKey(USERNAME))
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Username.Text = m_options[USERNAME];
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UsePassword.Checked = !passwordless;
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if (m_options.ContainsKey(PASSWORD))
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Password.Text = m_options[PASSWORD];
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Password.AskToEnterNewPassword = !string.IsNullOrEmpty(Password.Text);
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Port.Value = port;
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GenerateDebugOutput.Checked = debug;
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UseUnmanagedSSH.Checked = useUnmanaged;
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if (!m_options.ContainsKey(HAS_TESTED) || !bool.TryParse(m_options[HAS_TESTED], out m_hasTested))
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m_hasTested = false;
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if (!m_options.ContainsKey(HAS_WARNED_PATH) || !bool.TryParse(m_options[HAS_WARNED_PATH], out m_warnedPath))
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m_warnedPath = false;
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if (Library.Core.Utility.IsClientLinux)
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{
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//sftp is likely present on linux/mac
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m_warnedNoSFTP = true;
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}
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else
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{
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if (!m_options.ContainsKey(HAS_WARNED_NO_SFTP) || !bool.TryParse(m_options[HAS_WARNED_NO_SFTP], out m_warnedNoSFTP))
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m_warnedNoSFTP = false;
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}
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}
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private void TestConnection_Click(object sender, EventArgs e)
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{
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if (ValidateForm())
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{
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Cursor c = this.Cursor;
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try
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{
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this.Cursor = Cursors.WaitCursor;
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Save();
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Dictionary<string, string> options = new Dictionary<string, string>();
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string destination = GetConfiguration(m_applicationSettings, m_options, options);
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options["debug-to-console"] = "";
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SSH ssh = new SSH(destination, options);
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ssh.List();
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MessageBox.Show(this, Interface.CommonStrings.ConnectionSuccess, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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m_hasTested = true;
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}
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catch (Interface.FolderMissingException)
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{
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switch (MessageBox.Show(this, Strings.SSHUI.CreateMissingFolderQuestion, Application.ProductName, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question))
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{
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case DialogResult.Yes:
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CreateFolderButton.PerformClick();
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TestConnection.PerformClick();
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return;
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default:
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return;
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}
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}
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catch (Exception ex)
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{
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MessageBox.Show(this, string.Format(Interface.CommonStrings.ConnectionFailure, ex.Message), Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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finally
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{
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this.Cursor = c;
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}
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}
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}
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private bool ValidateForm()
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{
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if (Servername.Text.Trim().Length <= 0)
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{
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MessageBox.Show(this, Interface.CommonStrings.EmptyServernameError, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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try { Servername.Focus(); }
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catch { }
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return false;
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}
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if (Username.Text.Trim().Length <= 0)
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{
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MessageBox.Show(this, Interface.CommonStrings.EmptyUsernameError, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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try { Username.Focus(); }
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catch { }
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return false;
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}
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if (Password.Text.Trim().Length <= 0 && UsePassword.Checked)
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{
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MessageBox.Show(this, Interface.CommonStrings.EmptyPasswordError, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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try { Password.Focus(); }
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catch { }
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return false;
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}
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if (!UsePassword.Checked && !UseUnmanagedSSH.Checked)
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{
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MessageBox.Show(this, Strings.SSHUI.PasswordRequiredError, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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UsePassword.Checked = true;
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try { Password.Focus(); }
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catch { }
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return false;
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}
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if (!m_warnedPath && Path.Text.Trim().Length == 0)
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{
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if (MessageBox.Show(this, Interface.CommonStrings.DefaultDirectoryWarning, Application.ProductName, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) != DialogResult.Yes)
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{
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return false;
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}
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m_warnedPath = true;
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}
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if (!m_warnedNoSFTP && UseUnmanagedSSH.Checked)
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{
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string sftpPath = "";
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if (m_applicationSettings.ContainsKey(SSHCommonOptions.SFTP_PATH))
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sftpPath = m_applicationSettings[SSHCommonOptions.SFTP_PATH];
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System.IO.FileInfo fi = null;
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try { fi = new System.IO.FileInfo(System.Environment.ExpandEnvironmentVariables(sftpPath)); }
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catch { }
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if (fi == null || !fi.Exists)
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{
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if (MessageBox.Show(this, Strings.SSHUI.MissingSCPWarning, Application.ProductName, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning) != DialogResult.Yes)
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{
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return false;
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}
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m_warnedNoSFTP = true;
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}
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}
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return true;
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}
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private void Path_TextChanged(object sender, EventArgs e)
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{
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m_warnedPath = false;
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m_hasTested = false;
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}
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private void Servername_TextChanged(object sender, EventArgs e)
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{
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m_hasTested = false;
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}
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private void Username_TextChanged(object sender, EventArgs e)
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{
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m_hasTested = false;
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}
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private void Password_TextChanged(object sender, EventArgs e)
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{
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m_hasTested = false;
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}
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private void Port_ValueChanged(object sender, EventArgs e)
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{
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m_hasTested = false;
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}
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private void UsePassword_CheckedChanged(object sender, EventArgs e)
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{
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Password.Enabled = UsePassword.Checked;
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m_hasTested = false;
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}
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public static string PageTitle
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{
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get { return Strings.SSHUI.PageTitle; }
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}
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public static string PageDescription
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{
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get { return Strings.SSHUI.PageDescription; }
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}
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public static string GetConfiguration(IDictionary<string, string> applicationSettings, IDictionary<string, string> guiOptions, IDictionary<string, string> commandlineOptions)
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{
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if (guiOptions.ContainsKey(USERNAME) && !string.IsNullOrEmpty(guiOptions[USERNAME]))
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commandlineOptions["ftp-username"] = guiOptions[USERNAME];
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bool passwordless;
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if (!guiOptions.ContainsKey(PASWORDLESS) || !bool.TryParse(guiOptions[PASWORDLESS], out passwordless))
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passwordless = false;
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if (!passwordless && guiOptions.ContainsKey(PASSWORD) && !string.IsNullOrEmpty(guiOptions[PASSWORD]))
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commandlineOptions["ftp-password"] = guiOptions[PASSWORD];
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if (!commandlineOptions.ContainsKey("ssh-options"))
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commandlineOptions["ssh-options"] = "";
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int port;
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if (!guiOptions.ContainsKey(PORT) || !int.TryParse(guiOptions[PORT], out port))
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port = 22;
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if (applicationSettings.ContainsKey(SSHCommonOptions.SFTP_PATH))
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commandlineOptions[SSH.SFTP_PATH_OPTION] = applicationSettings[SSHCommonOptions.SFTP_PATH];
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bool debug;
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if (!guiOptions.ContainsKey(DEBUG_ENABLED) || !bool.TryParse(guiOptions[DEBUG_ENABLED], out debug))
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debug = false;
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if (debug)
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commandlineOptions["debug-to-console"] = "";
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bool useUnmanaged = guiOptions.ContainsKey(USE_UNMANAGED_SSH) ? Core.Utility.ParseBool(guiOptions[USE_UNMANAGED_SSH], false) : false;
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if (useUnmanaged)
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{
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commandlineOptions[SSH.USE_UNMANAGED_OPTION] = "";
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commandlineOptions["disable-streaming-transfers"] = "";
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}
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if (!guiOptions.ContainsKey(HOST))
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throw new Exception(string.Format(Interface.CommonStrings.ConfigurationIsMissingItemError, HOST));
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return "ssh://" + guiOptions[HOST] + ":" + port.ToString() + "/" + (guiOptions.ContainsKey(FOLDER) ? guiOptions[FOLDER] : "");
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}
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private void UseUnmanagedSSH_CheckedChanged(object sender, EventArgs e)
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{
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}
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private void CreateFolderButton_Click(object sender, EventArgs e)
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{
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if (ValidateForm())
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{
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Cursor c = this.Cursor;
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try
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{
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this.Cursor = Cursors.WaitCursor;
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Save();
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Dictionary<string, string> options = new Dictionary<string, string>();
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string destination = GetConfiguration(m_applicationSettings, m_options, options);
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options["debug-to-console"] = "";
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SSH ssh = new SSH(destination, options);
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ssh.CreateFolder();
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MessageBox.Show(this, Interface.CommonStrings.FolderCreated, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
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m_hasTested = true;
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}
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catch (Exception ex)
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{
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MessageBox.Show(this, string.Format(Interface.CommonStrings.ConnectionFailure, ex.Message), Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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finally
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{
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this.Cursor = c;
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}
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}
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}
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}
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}
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