kenneth.skovhede@gmail.com
987086e8f0
git-svn-id: https://duplicati.googlecode.com/svn/trunk@57 59da171f-624f-0410-aa54-27559c288bec
106 lines
3.7 KiB
C#
106 lines
3.7 KiB
C#
#region Disclaimer / License
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// Copyright (C) 2008, 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.Text;
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namespace Duplicati.Library.Encryption
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{
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/// <summary>
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/// Class that wraps a backend and transparently encrypts and decrypts data to and from the backend
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/// </summary>
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public class EncryptedBackendWrapper : Backend.IBackendInterface
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{
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private Backend.IBackendInterface m_realbackend;
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private IEncryption m_encryptionEngine;
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public EncryptedBackendWrapper(string target, Dictionary<string, string> options)
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: this(Backend.BackendLoader.GetBackend(target, options), options)
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{
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}
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public EncryptedBackendWrapper(Backend.IBackendInterface backend, Dictionary<string, string> options)
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{
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if (!options.ContainsKey("passphrase") || string.IsNullOrEmpty(options["passphrase"]))
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throw new Exception("No passphrase set");
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string passphrase = options["passphrase"];
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m_realbackend = backend;
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if (options.ContainsKey("gpg-encryption"))
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m_encryptionEngine = new GPGEncryption(passphrase, options.ContainsKey("sign-key") ? options["sign-key"] : null);
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else
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m_encryptionEngine = new AESEncryption(passphrase);
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}
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#region IBackendInterface Members
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public string DisplayName
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{
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get { return m_realbackend.DisplayName; }
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}
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public string ProtocolKey
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{
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get { return m_realbackend.ProtocolKey; }
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}
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public List<Duplicati.Library.Backend.FileEntry> List()
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{
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return m_realbackend.List();
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}
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public void Put(string remotename, string filename)
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{
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remotename += (m_encryptionEngine is AESEncryption ? ".aes" : ".gpg");
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using (Core.TempFile tf = new Duplicati.Library.Core.TempFile())
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{
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m_encryptionEngine.Encrypt(filename, tf);
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m_realbackend.Put(remotename, tf);
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}
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}
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public void Get(string remotename, string filename)
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{
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using (Core.TempFile tf = new Duplicati.Library.Core.TempFile())
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{
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m_realbackend.Get(remotename, tf);
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m_encryptionEngine.Decrypt(tf, filename);
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}
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}
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public void Delete(string remotename)
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{
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m_realbackend.Delete(remotename);
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}
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#endregion
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public static Backend.IBackendInterface WrapWithEncryption(Backend.IBackendInterface backend, Dictionary<string, string> options)
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{
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if (options.ContainsKey("no-encryption"))
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return backend;
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else
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return new EncryptedBackendWrapper(backend, options);
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}
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}
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}
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