365 lines
8.7 KiB
C#
365 lines
8.7 KiB
C#
/*
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KeePass Password Safe - The Open-Source Password Manager
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Copyright (C) 2003-2016 Dominik Reichl <dominik.reichl@t-online.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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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.Diagnostics;
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using System.IO;
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using System.Text;
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using System.Xml.Serialization;
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using KeePassLib.Interfaces;
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using KeePassLib.Utility;
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namespace KeePassLib.Serialization
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{
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public enum IOCredSaveMode
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{
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/// <summary>
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/// Do not remember user name or password.
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/// </summary>
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NoSave = 0,
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/// <summary>
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/// Remember the user name only, not the password.
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/// </summary>
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UserNameOnly,
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/// <summary>
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/// Save both user name and password.
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/// </summary>
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SaveCred
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}
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public enum IOCredProtMode
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{
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None = 0,
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Obf
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}
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/* public enum IOFileFormatHint
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{
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None = 0,
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Deprecated
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} */
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public sealed class IOConnectionInfo : IDeepCloneable<IOConnectionInfo>
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{
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// private IOFileFormatHint m_ioHint = IOFileFormatHint.None;
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private string m_strUrl = string.Empty;
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public string Path
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{
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get { return m_strUrl; }
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set
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{
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Debug.Assert(value != null);
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if(value == null) throw new ArgumentNullException("value");
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m_strUrl = value;
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}
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}
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private string m_strUser = string.Empty;
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[DefaultValue("")]
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public string UserName
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{
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get { return m_strUser; }
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set
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{
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Debug.Assert(value != null);
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if(value == null) throw new ArgumentNullException("value");
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m_strUser = value;
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}
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}
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private string m_strPassword = string.Empty;
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[DefaultValue("")]
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public string Password
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{
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get { return m_strPassword; }
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set
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{
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Debug.Assert(value != null);
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if(value == null) throw new ArgumentNullException("value");
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m_strPassword = value;
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}
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}
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private IOCredProtMode m_ioCredProtMode = IOCredProtMode.None;
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public IOCredProtMode CredProtMode
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{
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get { return m_ioCredProtMode; }
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set { m_ioCredProtMode = value; }
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}
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private IOCredSaveMode m_ioCredSaveMode = IOCredSaveMode.NoSave;
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public IOCredSaveMode CredSaveMode
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{
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get { return m_ioCredSaveMode; }
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set { m_ioCredSaveMode = value; }
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}
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private bool m_bComplete = false;
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[XmlIgnore]
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public bool IsComplete // Credentials etc. fully specified
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{
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get { return m_bComplete; }
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set { m_bComplete = value; }
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}
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/* public IOFileFormatHint FileFormatHint
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{
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get { return m_ioHint; }
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set { m_ioHint = value; }
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} */
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private IocProperties m_props = new IocProperties();
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[XmlIgnore]
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public IocProperties Properties
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{
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get { return m_props; }
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set
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{
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if(value == null) throw new ArgumentNullException("value");
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m_props = value;
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}
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}
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/// <summary>
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/// For serialization only; use <c>Properties</c> in code.
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/// </summary>
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[DefaultValue("")]
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public string PropertiesEx
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{
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get { return m_props.Serialize(); }
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set
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{
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if(value == null) throw new ArgumentNullException("value");
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IocProperties p = IocProperties.Deserialize(value);
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Debug.Assert(p != null);
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m_props = (p ?? new IocProperties());
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}
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}
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public IOConnectionInfo CloneDeep()
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{
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IOConnectionInfo ioc = (IOConnectionInfo)this.MemberwiseClone();
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ioc.m_props = m_props.CloneDeep();
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return ioc;
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}
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#if DEBUG // For debugger display only
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public override string ToString()
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{
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return GetDisplayName();
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}
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#endif
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/// <summary>
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/// Serialize the current connection info to a string. Credentials
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/// are serialized based on the <c>CredSaveMode</c> property.
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/// </summary>
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/// <param name="iocToCompile">Input object to be serialized.</param>
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/// <returns>Serialized object as string.</returns>
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public static string SerializeToString(IOConnectionInfo iocToCompile)
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{
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Debug.Assert(iocToCompile != null);
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if(iocToCompile == null) throw new ArgumentNullException("iocToCompile");
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string strUrl = iocToCompile.Path;
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string strUser = TransformUnreadable(iocToCompile.UserName, true);
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string strPassword = TransformUnreadable(iocToCompile.Password, true);
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string strAll = strUrl + strUser + strPassword + "CUN";
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char chSep = StrUtil.GetUnusedChar(strAll);
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if(chSep == char.MinValue) throw new FormatException();
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StringBuilder sb = new StringBuilder();
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sb.Append(chSep);
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sb.Append(strUrl);
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sb.Append(chSep);
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if(iocToCompile.CredSaveMode == IOCredSaveMode.SaveCred)
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{
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sb.Append('C');
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sb.Append(chSep);
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sb.Append(strUser);
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sb.Append(chSep);
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sb.Append(strPassword);
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}
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else if(iocToCompile.CredSaveMode == IOCredSaveMode.UserNameOnly)
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{
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sb.Append('U');
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sb.Append(chSep);
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sb.Append(strUser);
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sb.Append(chSep);
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}
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else // Don't remember credentials
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{
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sb.Append('N');
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sb.Append(chSep);
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sb.Append(chSep);
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}
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return sb.ToString();
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}
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public static IOConnectionInfo UnserializeFromString(string strToDecompile)
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{
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Debug.Assert(strToDecompile != null);
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if(strToDecompile == null) throw new ArgumentNullException("strToDecompile");
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if(strToDecompile.Length <= 1) throw new ArgumentException();
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char chSep = strToDecompile[0];
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string[] vParts = strToDecompile.Substring(1, strToDecompile.Length -
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1).Split(new char[]{ chSep });
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if(vParts.Length < 4) throw new ArgumentException();
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IOConnectionInfo s = new IOConnectionInfo();
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s.Path = vParts[0];
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if(vParts[1] == "C")
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s.CredSaveMode = IOCredSaveMode.SaveCred;
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else if(vParts[1] == "U")
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s.CredSaveMode = IOCredSaveMode.UserNameOnly;
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else
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s.CredSaveMode = IOCredSaveMode.NoSave;
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s.UserName = TransformUnreadable(vParts[2], false);
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s.Password = TransformUnreadable(vParts[3], false);
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return s;
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}
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/// <summary>
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/// Very simple string protection. Doesn't really encrypt the input
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/// string, only encodes it that it's not readable on the first glance.
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/// </summary>
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/// <param name="strToEncode">The string to encode/decode.</param>
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/// <param name="bEncode">If <c>true</c>, the string will be encoded,
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/// otherwise it'll be decoded.</param>
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/// <returns>Encoded/decoded string.</returns>
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private static string TransformUnreadable(string strToEncode, bool bEncode)
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{
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Debug.Assert(strToEncode != null);
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if(strToEncode == null) throw new ArgumentNullException("strToEncode");
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if(bEncode)
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{
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byte[] pbUtf8 = StrUtil.Utf8.GetBytes(strToEncode);
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unchecked
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{
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for(int iPos = 0; iPos < pbUtf8.Length; ++iPos)
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pbUtf8[iPos] += (byte)(iPos * 11);
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}
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return Convert.ToBase64String(pbUtf8);
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}
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else // Decode
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{
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byte[] pbBase = Convert.FromBase64String(strToEncode);
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unchecked
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{
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for(int iPos = 0; iPos < pbBase.Length; ++iPos)
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pbBase[iPos] -= (byte)(iPos * 11);
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}
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return StrUtil.Utf8.GetString(pbBase, 0, pbBase.Length);
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}
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}
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public string GetDisplayName()
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{
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string str = m_strUrl;
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if(m_strUser.Length > 0)
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str += (" (" + m_strUser + ")");
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return str;
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}
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public bool IsEmpty()
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{
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return (m_strUrl.Length == 0);
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}
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public static IOConnectionInfo FromPath(string strPath)
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{
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IOConnectionInfo ioc = new IOConnectionInfo();
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ioc.Path = strPath;
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ioc.CredSaveMode = IOCredSaveMode.NoSave;
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return ioc;
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}
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public bool CanProbablyAccess()
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{
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if(IsLocalFile()) return File.Exists(m_strUrl);
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return true;
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}
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public bool IsLocalFile()
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{
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// Not just ":/", see e.g. AppConfigEx.ChangePathRelAbs
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return (m_strUrl.IndexOf("://") < 0);
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}
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public void ClearCredentials(bool bDependingOnRememberMode)
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{
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if((bDependingOnRememberMode == false) ||
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(m_ioCredSaveMode == IOCredSaveMode.NoSave))
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{
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m_strUser = string.Empty;
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}
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if((bDependingOnRememberMode == false) ||
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(m_ioCredSaveMode == IOCredSaveMode.NoSave) ||
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(m_ioCredSaveMode == IOCredSaveMode.UserNameOnly))
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{
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m_strPassword = string.Empty;
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}
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}
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public void Obfuscate(bool bObf)
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{
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if(bObf && (m_ioCredProtMode == IOCredProtMode.None))
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{
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m_strPassword = StrUtil.Obfuscate(m_strPassword);
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m_ioCredProtMode = IOCredProtMode.Obf;
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}
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else if(!bObf && (m_ioCredProtMode == IOCredProtMode.Obf))
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{
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m_strPassword = StrUtil.Deobfuscate(m_strPassword);
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m_ioCredProtMode = IOCredProtMode.None;
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}
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}
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}
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}
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