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86 lines
3.6 KiB
C#
86 lines
3.6 KiB
C#
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Identify.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies VMware disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// 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, but
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// 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, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using DiscImageChef.CommonTypes.Interfaces;
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namespace DiscImageChef.DiscImages
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{
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public partial class VMware
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{
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public bool Identify(IFilter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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byte[] ddfMagic = new byte[0x15];
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if(stream.Length > Marshal.SizeOf(vmEHdr))
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{
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stream.Seek(0, SeekOrigin.Begin);
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byte[] vmEHdrB = new byte[Marshal.SizeOf(vmEHdr)];
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stream.Read(vmEHdrB, 0, Marshal.SizeOf(vmEHdr));
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vmEHdr = new VMwareExtentHeader();
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IntPtr headerPtr = Marshal.AllocHGlobal(Marshal.SizeOf(vmEHdr));
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Marshal.Copy(vmEHdrB, 0, headerPtr, Marshal.SizeOf(vmEHdr));
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vmEHdr = (VMwareExtentHeader)Marshal.PtrToStructure(headerPtr, typeof(VMwareExtentHeader));
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Marshal.FreeHGlobal(headerPtr);
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stream.Seek(0, SeekOrigin.Begin);
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stream.Read(ddfMagic, 0, 0x15);
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vmCHdr = new VMwareCowHeader();
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if(stream.Length <= Marshal.SizeOf(vmCHdr))
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return ddfMagicBytes.SequenceEqual(ddfMagic) || vmEHdr.magic == VMWARE_EXTENT_MAGIC ||
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vmCHdr.magic == VMWARE_COW_MAGIC;
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stream.Seek(0, SeekOrigin.Begin);
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byte[] vmCHdrB = new byte[Marshal.SizeOf(vmCHdr)];
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stream.Read(vmCHdrB, 0, Marshal.SizeOf(vmCHdr));
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headerPtr = Marshal.AllocHGlobal(Marshal.SizeOf(vmCHdr));
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Marshal.Copy(vmCHdrB, 0, headerPtr, Marshal.SizeOf(vmCHdr));
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vmCHdr = (VMwareCowHeader)Marshal.PtrToStructure(headerPtr, typeof(VMwareCowHeader));
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Marshal.FreeHGlobal(headerPtr);
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return ddfMagicBytes.SequenceEqual(ddfMagic) || vmEHdr.magic == VMWARE_EXTENT_MAGIC ||
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vmCHdr.magic == VMWARE_COW_MAGIC;
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}
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stream.Seek(0, SeekOrigin.Begin);
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stream.Read(ddfMagic, 0, 0x15);
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return ddfMagicBytes.SequenceEqual(ddfMagic);
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}
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}
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}
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