Ejemplo n.º 1
0
 /// <inheritdoc />
 // Token: 0x060001A5 RID: 421 RVA: 0x0000D5F2 File Offset: 0x0000B7F2
 void IModuleWriterListener.OnWriterEvent(ModuleWriterBase writer, ModuleWriterEvent evt)
 {
     if (evt == ModuleWriterEvent.PESectionsCreated)
     {
         NativeEraser.Erase(writer as NativeModuleWriter, writer.Module as ModuleDefMD);
     }
     if (this.OnWriterEvent != null)
     {
         this.OnWriterEvent(writer, new ModuleWriterListenerEventArgs(evt));
     }
 }
 // Token: 0x060001AE RID: 430 RVA: 0x0000D73C File Offset: 0x0000B93C
 private static void Erase(List <Tuple <uint, uint, byte[]> > sections, IFileSection s)
 {
     foreach (Tuple <uint, uint, byte[]> sect in sections)
     {
         if ((uint)s.StartOffset >= sect.Item1 && (uint)s.EndOffset < sect.Item2)
         {
             NativeEraser.Erase(sect, (uint)s.StartOffset, (uint)(s.EndOffset - s.StartOffset));
             break;
         }
     }
 }
 // Token: 0x060001AD RID: 429 RVA: 0x0000D6D4 File Offset: 0x0000B8D4
 private static void Erase(List <Tuple <uint, uint, byte[]> > sections, uint beginOffset, uint size)
 {
     foreach (Tuple <uint, uint, byte[]> sect in sections)
     {
         if (beginOffset >= sect.Item1 && beginOffset + size < sect.Item2)
         {
             NativeEraser.Erase(sect, beginOffset, size);
             break;
         }
     }
 }
        // Token: 0x060001B0 RID: 432 RVA: 0x0000D89C File Offset: 0x0000BA9C
        public static void Erase(NativeModuleWriter writer, ModuleDefMD module)
        {
            if (writer == null || module == null)
            {
                return;
            }
            List <Tuple <uint, uint, byte[]> > sections = new List <Tuple <uint, uint, byte[]> >();
            MemoryStream s = new MemoryStream();

            foreach (NativeModuleWriter.OrigSection origSect in writer.OrigSections)
            {
                BinaryReaderChunk  oldChunk = origSect.Chunk;
                ImageSectionHeader sectHdr  = origSect.PESection;
                s.SetLength(0L);
                oldChunk.WriteTo(new BinaryWriter(s));
                byte[]            buf      = s.ToArray();
                BinaryReaderChunk newChunk = new BinaryReaderChunk(MemoryImageStream.Create(buf), oldChunk.GetVirtualSize());
                newChunk.SetOffset(oldChunk.FileOffset, oldChunk.RVA);
                origSect.Chunk = newChunk;
                sections.Add(Tuple.Create <uint, uint, byte[]>(sectHdr.PointerToRawData, sectHdr.PointerToRawData + sectHdr.SizeOfRawData, buf));
            }
            IMetaData md  = module.MetaData;
            uint      row = md.TablesStream.MethodTable.Rows;

            for (uint i = 1u; i <= row; i += 1u)
            {
                RawMethodRow method = md.TablesStream.ReadMethodRow(i);
                if ((method.ImplFlags & 3) == 0)
                {
                    NativeEraser.Erase(sections, (uint)md.PEImage.ToFileOffset((RVA)method.RVA));
                }
            }
            ImageDataDirectory res = md.ImageCor20Header.Resources;

            if (res.Size > 0u)
            {
                NativeEraser.Erase(sections, (uint)res.StartOffset, res.Size);
            }
            NativeEraser.Erase(sections, md.ImageCor20Header);
            NativeEraser.Erase(sections, md.MetaDataHeader);
            foreach (DotNetStream stream in md.AllStreams)
            {
                NativeEraser.Erase(sections, stream);
            }
        }
        // Token: 0x060001AF RID: 431 RVA: 0x0000D7C0 File Offset: 0x0000B9C0
        private static void Erase(List <Tuple <uint, uint, byte[]> > sections, uint methodOffset)
        {
            foreach (Tuple <uint, uint, byte[]> sect in sections)
            {
                if (methodOffset >= sect.Item1)
                {
                    uint f = (uint)sect.Item3[(int)((UIntPtr)(methodOffset - sect.Item1))];
                    uint size;
                    switch (f & 7u)
                    {
                    case 2u:
                    case 6u:
                        size = (f >> 2) + 1u;
                        break;

                    case 3u:
                    {
                        f   |= (uint)((uint)sect.Item3[(int)((UIntPtr)(methodOffset - sect.Item1 + 1u))] << 8);
                        size = (f >> 12) * 4u;
                        uint codeSize = BitConverter.ToUInt32(sect.Item3, (int)(methodOffset - sect.Item1 + 4u));
                        size += codeSize;
                        break;
                    }

                    case 4u:
                    case 5u:
                        goto IL_98;

                    default:
                        goto IL_98;
                    }
                    NativeEraser.Erase(sect, methodOffset, size);
                    continue;
IL_98:
                    break;
                }
            }
        }