/* * PERWAPI - An API for Reading and Writing PE Files * * Copyright (c) Diane Corney, Queensland University of Technology, 2004. * * This program is free software; you can redistribute it and/or modify * it under the terms of the PERWAPI Copyright as included with this * distribution in the file PERWAPIcopyright.rtf. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY as is explained in the copyright notice. * * The author may be contacted at d.corney@qut.edu.au * * Version Date: 26/01/07 */ using System; using System.IO; using System.Collections; namespace QUT.PERWAPI { /**************************************************************************/ // Class containing MetaData Constants /**************************************************************************/ ///

/// MetaData /// Root (20 bytes + UTF-8 Version String + quad align padding) /// StreamHeaders (8 bytes + null terminated name string + quad align padding) /// Streams /// #~ (always present - holds metadata tables) /// #Strings (always present - holds identifier strings) /// #US (Userstring heap) /// #Blob (signature blobs) /// #GUID (guids for assemblies or Modules) ///

internal class MetaData { internal static readonly uint maxSmlIxSize = 0xFFFF; internal static readonly uint max1BitSmlIx = 0x7FFF; internal static readonly uint max2BitSmlIx = 0x3FFF; internal static readonly uint max3BitSmlIx = 0x1FFF; internal static readonly uint max5BitSmlIx = 0x7FF; internal static readonly uint[] CIxBitMasks = { 0x0, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F }; internal static readonly int[] CIxShiftMap = { 2, 2, 5, 1, 2, 3, 1, 1, 1, 2, 3, 2, 1 }; internal static readonly uint[] CIxMaxMap = {max2BitSmlIx,max2BitSmlIx,max5BitSmlIx, max1BitSmlIx,max2BitSmlIx,max3BitSmlIx, max1BitSmlIx,max1BitSmlIx,max1BitSmlIx, max2BitSmlIx,max3BitSmlIx,max2BitSmlIx, max1BitSmlIx}; internal static readonly int[] TypeDefOrRefTable = { (int)MDTable.TypeDef, (int)MDTable.TypeRef, (int)MDTable.TypeSpec }; internal static readonly int[] HasConstantTable = { (int)MDTable.Field, (int)MDTable.Param, (int)MDTable.Property }; internal static readonly int[] HasCustomAttributeTable = {(int)MDTable.Method, (int)MDTable.Field, (int)MDTable.TypeRef, (int)MDTable.TypeDef,(int)MDTable.Param, (int)MDTable.InterfaceImpl, (int)MDTable.MemberRef, (int)MDTable.Module,(int)MDTable.DeclSecurity, (int)MDTable.Property,(int)MDTable.Event, (int)MDTable.StandAloneSig, (int)MDTable.ModuleRef, (int)MDTable.TypeSpec, (int)MDTable.Assembly, (int)MDTable.AssemblyRef, (int)MDTable.File, (int)MDTable.ExportedType, (int)MDTable.ManifestResource }; internal static readonly int[] HasFieldMarshalTable = { (int)MDTable.Field, (int)MDTable.Param }; internal static readonly int[] HasDeclSecurityTable = { (int)MDTable.TypeDef, (int)MDTable.Method, (int)MDTable.Assembly }; internal static readonly int[] MemberRefParentTable = {(int)MDTable.TypeDef, (int)MDTable.TypeRef, (int)MDTable.ModuleRef, (int)MDTable.Method, (int)MDTable.TypeSpec }; internal static readonly int[] HasSemanticsTable = { (int)MDTable.Event, (int)MDTable.Property }; internal static readonly int[] MethodDefOrRefTable = { (int)MDTable.Method, (int)MDTable.MemberRef }; internal static readonly int[] MemberForwardedTable = { (int)MDTable.Field, (int)MDTable.Method }; internal static readonly int[] ImplementationTable = { (int)MDTable.File, (int)MDTable.AssemblyRef, (int)MDTable.ExportedType }; internal static readonly int[] CustomAttributeTypeTable = { 0, 0, (int)MDTable.Method, (int)MDTable.MemberRef }; internal static readonly int[] ResolutionScopeTable = {(int)MDTable.Module, (int)MDTable.ModuleRef, (int)MDTable.AssemblyRef, (int)MDTable.TypeRef }; internal static readonly int[] TypeOrMethodDefTable = { (int)MDTable.TypeDef, (int)MDTable.Method }; internal static readonly int[][] CIxTables = {TypeDefOrRefTable, HasConstantTable, HasCustomAttributeTable, HasFieldMarshalTable, HasDeclSecurityTable, MemberRefParentTable, HasSemanticsTable, MethodDefOrRefTable, MemberForwardedTable, ImplementationTable, CustomAttributeTypeTable, ResolutionScopeTable, TypeOrMethodDefTable }; internal static readonly byte StringsHeapMask = 0x1; internal static readonly byte GUIDHeapMask = 0x2; internal static readonly byte BlobHeapMask = 0x4; internal static readonly uint MetaDataSignature = 0x424A5342; // NOTE: version and stream name strings MUST always be quad padded internal static readonly string[] versions = { "v1.1.4322\0\0\0", "v2.0.40607\0\0", "v2.0.41202\0\0", "v2.0.50215\0\0", "v2.0.50727\0\0", "2.0.0.0\0" }; internal static readonly byte[] LMajors = { 6, 8, 8, 8, 8 }; //internal static readonly string shortVersion = version.Substring(0,9); internal static readonly char[] tildeNameArray = { '#', '~', '\0', '\0' }; internal static readonly char[] stringsNameArray = { '#', 'S', 't', 'r', 'i', 'n', 'g', 's', '\0', '\0', '\0', '\0' }; internal static readonly char[] usNameArray = { '#', 'U', 'S', '\0' }; internal static readonly char[] guidNameArray = { '#', 'G', 'U', 'I', 'D', '\0', '\0', '\0' }; internal static readonly char[] blobNameArray = { '#', 'B', 'l', 'o', 'b', '\0', '\0', '\0' }; internal static readonly String stringsName = "#Strings"; internal static readonly String userstringName = "#US"; internal static readonly String blobName = "#Blob"; internal static readonly String guidName = "#GUID"; internal static readonly String tildeName = "#~"; internal static readonly uint MetaDataHeaderSize = 20 + (uint)versions[0].Length; internal static readonly uint TildeHeaderSize = 24; internal static readonly uint StreamHeaderSize = 8; internal static readonly uint NumMetaDataTables = (int)MDTable.MaxMDTable; internal static readonly uint tildeHeaderSize = 8 + (uint)tildeNameArray.Length; internal ulong valid = 0, /*sorted = 0x000002003301FA00;*/ sorted = 0; internal bool[] largeIx = new bool[NumMetaDataTables]; internal bool[] lgeCIx = new bool[(int)CIx.MaxCIx]; internal uint[] elemSize = new uint[NumMetaDataTables]; internal bool largeStrings = false, largeUS = false, largeGUID = false, largeBlob = false; internal MetaData() { InitMetaData(); } internal void InitMetaData() { for (int i = 0; i < NumMetaDataTables; i++) largeIx[i] = false; for (int i = 0; i < lgeCIx.Length; i++) lgeCIx[i] = false; } internal bool LargeIx(MDTable tabIx) { return largeIx[(uint)tabIx]; } internal uint CodedIndexSize(CIx code) { if (lgeCIx[(uint)code]) return 4; return 2; } internal uint TableIndexSize(MDTable tabIx) { if (largeIx[(uint)tabIx]) return 4; return 2; } internal uint StringsIndexSize() { if (largeStrings) return 4; return 2; } internal uint GUIDIndexSize() { if (largeGUID) return 4; return 2; } internal uint USIndexSize() { if (largeUS) return 4; return 2; } internal uint BlobIndexSize() { if (largeBlob) return 4; return 2; } internal void CalcElemSize() { elemSize[(int)MDTable.Assembly] = Assembly.Size(this); elemSize[(int)MDTable.AssemblyOS] = 12; elemSize[(int)MDTable.AssemblyProcessor] = 4; elemSize[(int)MDTable.AssemblyRefOS] = 12 + TableIndexSize(MDTable.AssemblyRef); elemSize[(int)MDTable.AssemblyRefProcessor] = 4 + TableIndexSize(MDTable.AssemblyRef); elemSize[(int)MDTable.Module] = Module.Size(this); elemSize[(int)MDTable.TypeRef] = ClassRef.Size(this); elemSize[(int)MDTable.TypeDef] = ClassDef.Size(this); elemSize[(int)MDTable.Field] = FieldDef.Size(this); elemSize[(int)MDTable.Method] = MethodDef.Size(this); elemSize[(int)MDTable.Param] = Param.Size(this); elemSize[(int)MDTable.InterfaceImpl] = InterfaceImpl.Size(this); elemSize[(int)MDTable.MemberRef] = FieldRef.Size(this); elemSize[(int)MDTable.Constant] = ConstantElem.Size(this); elemSize[(int)MDTable.CustomAttribute] = CustomAttribute.Size(this); elemSize[(int)MDTable.FieldMarshal] = FieldMarshal.Size(this); elemSize[(int)MDTable.DeclSecurity] = DeclSecurity.Size(this); elemSize[(int)MDTable.ClassLayout] = ClassLayout.Size(this); elemSize[(int)MDTable.FieldLayout] = FieldLayout.Size(this); elemSize[(int)MDTable.StandAloneSig] = Signature.Size(this); elemSize[(int)MDTable.EventMap] = MapElem.Size(this, MDTable.EventMap); elemSize[(int)MDTable.Event] = Event.Size(this); elemSize[(int)MDTable.PropertyMap] = MapElem.Size(this, MDTable.PropertyMap); elemSize[(int)MDTable.Property] = Property.Size(this); elemSize[(int)MDTable.MethodSemantics] = MethodSemantics.Size(this); elemSize[(int)MDTable.MethodImpl] = MethodImpl.Size(this); elemSize[(int)MDTable.ModuleRef] = ModuleRef.Size(this); elemSize[(int)MDTable.TypeSpec] = TypeSpec.Size(this); elemSize[(int)MDTable.ImplMap] = ImplMap.Size(this); elemSize[(int)MDTable.FieldRVA] = FieldRVA.Size(this); elemSize[(int)MDTable.Assembly] = Assembly.Size(this); elemSize[(int)MDTable.AssemblyRef] = AssemblyRef.Size(this); elemSize[(int)MDTable.File] = FileRef.Size(this); elemSize[(int)MDTable.ExportedType] = ExternClass.Size(this); elemSize[(int)MDTable.ManifestResource] = ManifestResource.Size(this); elemSize[(int)MDTable.NestedClass] = MapElem.Size(this, MDTable.NestedClass); elemSize[(int)MDTable.GenericParam] = GenericParam.Size(this); elemSize[(int)MDTable.GenericParamConstraint] = GenericParamConstraint.Size(this); elemSize[(int)MDTable.MethodSpec] = MethodSpec.Size(this); } } }