private void BuildMetaDataStreams(BinaryReader fileReader)
{
// this code is factored out of script for ease of script reading
this.metaDataStreams = new MetaDataStream[this.metaDataRoot.NumberOfStreams];
// lets initialise some handy variables to save typing
long rootPos = this.metaDataRoot.StartOfRoot;
for (int i = 0; i < this.metaDataRoot.NumberOfStreams; i++)
{
// handy variable for shorter code
MetaDataStreamHeader streamHead = this.metaDataRoot.MetaDataStreamHeaders[i];
// move to correct position for start of stream. This is listed
// as an offset from the start of the metadataroot.
fileReader.BaseStream.Position = rootPos + streamHead.Offset;
this.metaDataStreams[i] = new MetaDataStream(fileReader, streamHead.Name, streamHead.Size, this);
if (this.metaDataStreams[i].Name == "#~")
{
this.tablesStream = this.metaDataStreams[i];
}
if (this.metaDataStreams[i].Name == "#Strings")
{
this.stringHeap = this.metaDataStreams[i];
}
}
}
public readonly uint[] NumberOfRows; // array of 4 byte unsigned ints indicating num of rows for each present table
public TablesHeader(BinaryReader reader, MetaDataStream stringheap)
{
//this.strings = new ArrayList();
//this.stringHeap = stringheap;
//this.reader = reader;
this.NumberOfRows = new UInt32[64];
// skip the first 6 bytes as we are not interested in them. They represent the fixed
// values of 0,1,0 for reserved, major version and minor version.
reader.BaseStream.Position += 6;
this.HeapSizes = reader.ReadByte();
// another fixed value we are not interested in
reader.BaseStream.Position += 1;
this.Valid = reader.ReadUInt64();
this.Sorted = reader.ReadUInt64();
uint length = 0;
// we are now ready to start reading the row lengths
for (int i = 0; i < 64; i++)
{
length = 0;
if (((this.Valid >> i) & 1) == 1)
{
length = reader.ReadUInt32();
}
this.NumberOfRows[i] = length;
}
}
public MetaDataTable(Tables.TableName table, Tables parent) //long startPosition, TablesHeader tablesHeader, MetaDataStream stringHeap, BinaryReader reader, Hashtable indexes)
{
this.tableNumber = (int)table;
this.parent = parent;
this.startPosition = parent.reader.BaseStream.Position;
this.reader = this.parent.reader;
this.indexSizeIndicator = this.parent.tablesHeader.HeapSizes;
this.stringHeap = this.parent.stringHeap;
this.numberOfRows = this.parent.RowsPerTable[this.tableNumber];
this.ReadRows();
}
//Retrieves a string from the StringHeap
public string GetStringFromStringHeap(uint stringIndex)
{
MetaDataStream stringHeapStream = this.peFile.stringHeap;
StringBuilder retrievedStringBuilder = new StringBuilder();
stringHeapStream.Reader.BaseStream.Position = stringHeapStream.StartPositionInFile + stringIndex;
byte nextChar = stringHeapStream.Reader.ReadByte();
while (nextChar != 0)
{
retrievedStringBuilder.Append((char)nextChar);
nextChar = stringHeapStream.Reader.ReadByte();
}
return(retrievedStringBuilder.ToString());
}
public Tables(TablesHeader tablesHeader, MetaDataStream stringHeap, BinaryReader reader)
{
this.tablesHeader = tablesHeader;
this.stringHeap = stringHeap;
this.reader = reader;
this.indexSizeIndicator = tablesHeader.HeapSizes;
this.RowsPerTable = tablesHeader.NumberOfRows;
// set up a table of coded index information
// the first figure in the array is the number of bits needed to encode
// which table the index is pointing to. Note, some indexes use more bits
// than are necessary, for example CustomAttributeType uses 3 bits even though
// it only points to 2 tables, so in theory could be encoded in 1 bit.
this.CodedIndexInformation = new object[12];
CodedIndexInformation[(int)Tables.CodedIndexType.TypeDefOrRef] = new int[] { 2, (int)Tables.TableName.TypeDef, (int)Tables.TableName.TypeRef, (int)Tables.TableName.TypeSpec };
CodedIndexInformation[(int)Tables.CodedIndexType.HasConstant] = new int[] { 2, (int)Tables.TableName.Field, (int)Tables.TableName.Param, (int)Tables.TableName.Property };
CodedIndexInformation[(int)Tables.CodedIndexType.HasCustomAttribute] = new int[] { 5, (int)Tables.TableName.MethodDef,
(int)Tables.TableName.Field,
(int)Tables.TableName.TypeRef,
(int)Tables.TableName.TypeDef,
(int)Tables.TableName.Param,
(int)Tables.TableName.InterfaceImpl,
(int)Tables.TableName.MemberRef,
(int)Tables.TableName.Module,
(int)Tables.TableName.DeclSecurity,
(int)Tables.TableName.Property,
(int)Tables.TableName.EventX,
(int)Tables.TableName.StandAloneSig,
(int)Tables.TableName.ModuleRef,
(int)Tables.TableName.TypeSpec,
(int)Tables.TableName.Assembly,
(int)Tables.TableName.AssemblyRef,
(int)Tables.TableName.File,
(int)Tables.TableName.ExportedType,
(int)Tables.TableName.ManifestResource };
CodedIndexInformation[(int)Tables.CodedIndexType.HasFieldMarshal] = new int[] { 1, (int)Tables.TableName.Field, (int)Tables.TableName.Param };
CodedIndexInformation[(int)Tables.CodedIndexType.HasDeclSecurity] = new int[] { 2, (int)Tables.TableName.TypeDef, (int)Tables.TableName.MethodDef, (int)Tables.TableName.Assembly };
CodedIndexInformation[(int)Tables.CodedIndexType.MemberRefParent] = new int[] { 3, (int)Tables.TableName.TypeRef, (int)Tables.TableName.ModuleRef, (int)Tables.TableName.MethodDef, (int)Tables.TableName.TypeSpec };
CodedIndexInformation[(int)Tables.CodedIndexType.HasSemantics] = new int[] { 1, (int)Tables.TableName.EventX, (int)Tables.TableName.Property };
CodedIndexInformation[(int)Tables.CodedIndexType.MethodDefOrRef] = new int[] { 1, (int)Tables.TableName.MethodDef, (int)Tables.TableName.MemberRef };
CodedIndexInformation[(int)Tables.CodedIndexType.MemberForwarded] = new int[] { 1, (int)Tables.TableName.Field, (int)Tables.TableName.MethodDef };
CodedIndexInformation[(int)Tables.CodedIndexType.Implementation] = new int[] { 2, (int)Tables.TableName.File, (int)Tables.TableName.AssemblyRef, (int)Tables.TableName.ExportedType };
CodedIndexInformation[(int)Tables.CodedIndexType.CustomAttributeType] = new int[] { 3, (int)Tables.TableName.MethodDef, (int)Tables.TableName.MemberRef };
CodedIndexInformation[(int)Tables.CodedIndexType.ResolutionScope] = new int[] { 2, (int)Tables.TableName.Module, (int)Tables.TableName.ModuleRef, (int)Tables.TableName.AssemblyRef, (int)Tables.TableName.TypeRef };
this.Module = new Module(Tables.TableName.Module, this);
this.TypeRef = new TypeRef(Tables.TableName.TypeRef, this);
this.TypeDef = new TypeDef(Tables.TableName.TypeDef, this);
this.Field = new Field(Tables.TableName.Field, this);
this.MethodDef = new MethodDef(Tables.TableName.MethodDef, this);
this.Param = new Param(Tables.TableName.Param, this);
this.InterfaceImpl = new InterfaceImpl(Tables.TableName.InterfaceImpl, this);
this.MemberRef = new MemberRef(Tables.TableName.MemberRef, this);
this.Constant = new Constant(Tables.TableName.Constant, this);
this.CustomAttribute = new CustomAttribute(Tables.TableName.CustomAttribute, this);
this.FieldMarshal = new FieldMarshal(Tables.TableName.FieldMarshal, this);
this.DeclSecurity = new DeclSecurity(Tables.TableName.DeclSecurity, this);
this.ClassLayout = new ClassLayout(Tables.TableName.ClassLayout, this);
this.FieldLayout = new FieldLayout(Tables.TableName.FieldLayout, this);
this.StandAloneSig = new StandAloneSig(Tables.TableName.StandAloneSig, this);
this.EventMap = new EventMap(Tables.TableName.EventMap, this);
this.EventX = new EventX(Tables.TableName.EventX, this);
this.PropertyMap = new PropertyMap(Tables.TableName.PropertyMap, this);
this.Property = new Property(Tables.TableName.Property, this);
this.MethodSemantics = new MethodSemantics(Tables.TableName.MethodSemantics, this);
this.MethodImpl = new MethodImpl(Tables.TableName.MethodImpl, this);
this.ModuleRef = new ModuleRef(Tables.TableName.ModuleRef, this);
this.TypeSpec = new TypeSpec(Tables.TableName.TypeSpec, this);
this.ImplMap = new ImplMap(Tables.TableName.ImplMap, this);
}
