238 lines
6.9 KiB
C#
238 lines
6.9 KiB
C#
/*
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KeePass Password Safe - The Open-Source Password Manager
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Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
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Modified to be used with Mono for Android. Changes Copyright (C) 2013 Philipp Crocoll
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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.Runtime.InteropServices;
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using System.Diagnostics;
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using KeePassLib.Utility;
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namespace KeePassLib.Native
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{
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/// <summary>
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/// Interface to native library (library containing fast versions of
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/// several cryptographic functions).
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/// </summary>
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public static class NativeLib
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{
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private static bool m_bAllowNative = true;
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/// <summary>
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/// If this property is set to <c>true</c>, the native library is used.
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/// If it is <c>false</c>, all calls to functions in this class will fail.
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/// </summary>
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public static bool AllowNative
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{
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get { return m_bAllowNative; }
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set { m_bAllowNative = value; }
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}
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/// <summary>
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/// Determine if the native library is installed.
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/// </summary>
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/// <returns>Returns <c>true</c>, if the native library is installed.</returns>
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public static bool IsLibraryInstalled()
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{
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byte[] pDummy0 = new byte[32];
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byte[] pDummy1 = new byte[32];
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// Save the native state
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bool bCachedNativeState = m_bAllowNative;
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// Temporarily allow native functions and try to load the library
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m_bAllowNative = true;
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bool bResult = TransformKey256(pDummy0, pDummy1, 16);
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// Pop native state and return result
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m_bAllowNative = bCachedNativeState;
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return bResult;
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}
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private static bool? m_bIsUnix = null;
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public static bool IsUnix()
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{
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if(m_bIsUnix.HasValue) return m_bIsUnix.Value;
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PlatformID p = GetPlatformID();
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// Mono defines Unix as 128 in early .NET versions
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#if !KeePassLibSD
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m_bIsUnix = ((p == PlatformID.Unix) || (p == PlatformID.MacOSX) ||
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((int)p == 128));
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#else
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m_bIsUnix = (((int)p == 4) || ((int)p == 6) || ((int)p == 128));
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#endif
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return m_bIsUnix.Value;
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}
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private static PlatformID? m_platID = null;
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public static PlatformID GetPlatformID()
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{
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if(m_platID.HasValue) return m_platID.Value;
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m_platID = Environment.OSVersion.Platform;
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#if !KeePassLibSD
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/*// Mono returns PlatformID.Unix on Mac OS X, workaround this
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//fails on Anroid
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if(m_platID.Value == PlatformID.Unix)
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{
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if((RunConsoleApp("uname", null) ?? string.Empty).Trim().Equals(
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"Darwin", StrUtil.CaseIgnoreCmp))
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m_platID = PlatformID.MacOSX;
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}*/
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#endif
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return m_platID.Value;
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}
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#if !KeePassLibSD
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public static string RunConsoleApp(string strAppPath, string strParams)
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{
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return RunConsoleApp(strAppPath, strParams, null);
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}
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public static string RunConsoleApp(string strAppPath, string strParams,
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string strStdInput)
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{
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if(strAppPath == null) throw new ArgumentNullException("strAppPath");
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if(strAppPath.Length == 0) throw new ArgumentException("strAppPath");
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try
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{
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ProcessStartInfo psi = new ProcessStartInfo();
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psi.CreateNoWindow = true;
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psi.FileName = strAppPath;
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psi.WindowStyle = ProcessWindowStyle.Hidden;
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psi.UseShellExecute = false;
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psi.RedirectStandardOutput = true;
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if(strStdInput != null) psi.RedirectStandardInput = true;
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if(!string.IsNullOrEmpty(strParams)) psi.Arguments = strParams;
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Process p = Process.Start(psi);
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if(strStdInput != null)
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{
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p.StandardInput.Write(strStdInput);
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p.StandardInput.Close();
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}
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string strOutput = p.StandardOutput.ReadToEnd();
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p.WaitForExit();
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return strOutput;
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}
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catch(Exception) { Debug.Assert(false); }
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return null;
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}
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#endif
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/// <summary>
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/// Transform a key.
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/// </summary>
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/// <param name="pBuf256">Source and destination buffer.</param>
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/// <param name="pKey256">Key to use in the transformation.</param>
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/// <param name="uRounds">Number of transformation rounds.</param>
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/// <returns>Returns <c>true</c>, if the key was transformed successfully.</returns>
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public static bool TransformKey256(byte[] pBuf256, byte[] pKey256,
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ulong uRounds)
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{
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if(m_bAllowNative == false) return false;
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KeyValuePair<IntPtr, IntPtr> kvp = PrepareArrays256(pBuf256, pKey256);
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bool bResult = false;
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try
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{
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bResult = NativeMethods.TransformKey(kvp.Key, kvp.Value, uRounds);
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}
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catch(Exception) { bResult = false; }
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if(bResult) GetBuffers256(kvp, pBuf256, pKey256);
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NativeLib.FreeArrays(kvp);
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return bResult;
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}
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/// <summary>
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/// Benchmark key transformation.
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/// </summary>
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/// <param name="uTimeMs">Number of seconds to perform the benchmark.</param>
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/// <param name="puRounds">Number of transformations done.</param>
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/// <returns>Returns <c>true</c>, if the benchmark was successful.</returns>
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public static bool TransformKeyBenchmark256(uint uTimeMs, out ulong puRounds)
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{
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puRounds = 0;
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if(m_bAllowNative == false) return false;
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try { puRounds = NativeMethods.TransformKeyBenchmark(uTimeMs); }
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catch(Exception) { return false; }
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return true;
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}
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private static KeyValuePair<IntPtr, IntPtr> PrepareArrays256(byte[] pBuf256,
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byte[] pKey256)
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{
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Debug.Assert((pBuf256 != null) && (pBuf256.Length == 32));
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if(pBuf256 == null) throw new ArgumentNullException("pBuf256");
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if(pBuf256.Length != 32) throw new ArgumentException();
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Debug.Assert((pKey256 != null) && (pKey256.Length == 32));
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if(pKey256 == null) throw new ArgumentNullException("pKey256");
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if(pKey256.Length != 32) throw new ArgumentException();
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IntPtr hBuf = Marshal.AllocHGlobal(pBuf256.Length);
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Marshal.Copy(pBuf256, 0, hBuf, pBuf256.Length);
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IntPtr hKey = Marshal.AllocHGlobal(pKey256.Length);
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Marshal.Copy(pKey256, 0, hKey, pKey256.Length);
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return new KeyValuePair<IntPtr, IntPtr>(hBuf, hKey);
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}
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private static void GetBuffers256(KeyValuePair<IntPtr, IntPtr> kvpSource,
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byte[] pbDestBuf, byte[] pbDestKey)
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{
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if(kvpSource.Key != IntPtr.Zero)
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Marshal.Copy(kvpSource.Key, pbDestBuf, 0, pbDestBuf.Length);
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if(kvpSource.Value != IntPtr.Zero)
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Marshal.Copy(kvpSource.Value, pbDestKey, 0, pbDestKey.Length);
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}
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private static void FreeArrays(KeyValuePair<IntPtr, IntPtr> kvpPointers)
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{
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if(kvpPointers.Key != IntPtr.Zero)
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Marshal.FreeHGlobal(kvpPointers.Key);
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if(kvpPointers.Value != IntPtr.Zero)
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Marshal.FreeHGlobal(kvpPointers.Value);
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}
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}
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}
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