Stream in the Meta Data (#Strings, #US, #Blob and #GUID)
Inheritance: System.IO.BinaryReader
示例#1
0
文件: PERWAPI.cs 项目: nomit007/f4
 private void ReadMetaData()
 {
     if (Diag.DiagOn) Console.WriteLine("MetaData at RVA = " + Hex.Int(metaDataRVA) + " and offset = " + Hex.Int(GetOffset(metaDataRVA)));
     BaseStream.Seek(GetOffset(metaDataRVA),SeekOrigin.Begin);
     uint sig = ReadUInt32();              // check
     verInfo.mdMajVer = ReadUInt16();           // check
     verInfo.mdMinVer = ReadUInt16();           // check
     ReadZeros(4);
     int verStrLen = ReadInt32();
     int end = -1;
     char[] verString = new char[verStrLen+1];
     for (int i=0; i < verStrLen; i++) {
         verString[i] = (char)ReadByte();
         if ((verString[i] == 0) && (end == -1)) end = i;
     }
     verString[verStrLen] = (char)0; // check
     if (end == -1) end = verStrLen;
     verInfo.netVerString = new string(verString,0,end);
     verInfo.SetVersionFromString();
     GenericParam.extraField = verInfo.netVerString.CompareTo(MetaData.versions[1]) <= 0; // after version 2.0.40607
     if (Diag.DiagOn && GenericParam.extraField) {
         Console.WriteLine("Version = " + verInfo.netVerString + " has extra field for GenericParam");
     }
     int alignNum = 0;
     if ((verStrLen % 4) != 0) alignNum = 4 - (verStrLen % 4);
     ReadZeros(alignNum);
     flags = ReadUInt16(); // check
     int numStreams = ReadUInt16();
     streamOffsets = new uint[numStreams];
     streamSizes = new uint[numStreams];
     streamNames = new String[numStreams];
     if (Diag.DiagOn)
         Console.WriteLine("MetaData Streams");
     for (int i=0; i < numStreams; i++) {
         streamOffsets[i] = ReadUInt32();
         streamSizes[i] = ReadUInt32();
         streamNames[i] = ReadStreamName();
         if (Diag.DiagOn)
             Console.WriteLine("  " + streamNames[i] + "  Offset = " + Hex.Int(streamOffsets[i]) + "  Size = " + Hex.Int(streamSizes[i]));
     }
     uint tildeIx = 0;
     for (uint i=0; i < numStreams; i++) {
         String nam = streamNames[i];
         if (MetaData.tildeName.CompareTo(nam) == 0) tildeIx = i;
         else {
             uint streamoff = GetOffset(metaDataRVA + streamOffsets[i]);
             if (Diag.DiagOn) Console.WriteLine("getting stream bytes at offset " + Hex.Int(streamoff));
             BaseStream.Seek(GetOffset(metaDataRVA+streamOffsets[i]),SeekOrigin.Begin);
             long streamStart = BaseStream.Position;
             byte[] strBytes = ReadBytes((int)streamSizes[i]);
             if (MetaData.stringsName.CompareTo(nam) == 0) {
                 strings = new MetaDataInStream(strBytes);
             } else if (MetaData.userstringName.CompareTo(nam) == 0) {
                 userstring = new MetaDataStringStream(strBytes);
             } else if (MetaData.blobName.CompareTo(nam) == 0) {
                 blobStreamStartOffset = streamStart;
                 blob = new MetaDataInStream(strBytes);
             } else if (MetaData.guidName.CompareTo(nam) == 0) {
                 guid = new MetaDataInStream(strBytes);
             } else if (nam.CompareTo("#-") == 0) {
                 tildeIx = i;
                 //throw new Exception("Illegal uncompressed data stream #-");
             } else {
                 Console.WriteLine("Unknown stream - " + nam);
             }
         }
     }
     // go to beginning of tilde stream
     BaseStream.Seek(GetOffset(metaDataRVA+streamOffsets[tildeIx]),SeekOrigin.Begin);
     ReadTildeStreamStart();
 }
示例#2
0
文件: PERWAPI.cs 项目: nomit007/f4
        private PEReader(PEFile pefile, System.IO.FileStream file, bool refs, bool skipBody)
            : base(new MemoryStream(new BinaryReader(file).ReadBytes(System.Convert.ToInt32(file.Length))))
        {
            this.skipBody = skipBody;
            thisScope = pefile;
            refsOnly = refs;
            verInfo.fromExisting = true;
            try {
                ReadDOSHeader();
            } catch (PEFileException) {
                Console.WriteLine("Bad DOS header");
                return;
            }
            ReadFileHeader();
            ReadSectionHeaders();
            ReadCLIHeader();
            ReadMetaData();
            if (refsOnly)
                ReadMetaDataTableRefs();
            else {
                ReadMetaDataTables();
                pefile.metaDataTables = new MetaDataTables(tables);
            }
            file.Close();

            if (thisScope != null) {
                thisScope.buffer = this;
                if (pefile != null) {
                    pefile.versionInfo = verInfo;
                }
            }
            strings = null;
            userstring = null;
            blob = null;
            guid = null;
        }