void AddInternalsVisibleToAttribute()
{
bool b = GetCorLibToken(out var corlibToken);
Debug.Assert(b, "No corlib assembly found");
if (!b)
{
return;
}
b = CodedToken.ResolutionScope.Encode(corlibToken, out uint corlibEncodedToken);
Debug.Assert(b);
if (!b)
{
return;
}
uint ivtTypeRefRid = mdEditor.TablesHeap.TypeRefTable.Create();
var ivtTypeRefRow = new RawTypeRefRow(corlibEncodedToken, mdEditor.StringsHeap.Create("InternalsVisibleToAttribute"), mdEditor.StringsHeap.Create("System.Runtime.CompilerServices"));
mdEditor.TablesHeap.TypeRefTable.Set(ivtTypeRefRid, ref ivtTypeRefRow);
uint ivtCtorRid = mdEditor.TablesHeap.MemberRefTable.Create();
var ivtCtorRow = new RawMemberRefRow(CodedToken.MemberRefParent.Encode(new MDToken(Table.TypeRef, ivtTypeRefRid)),
mdEditor.StringsHeap.Create(".ctor"), mdEditor.BlobHeap.Create(ivtCtorSigBlob));
mdEditor.TablesHeap.MemberRefTable.Set(ivtCtorRid, ref ivtCtorRow);
uint ivtCARid = mdEditor.TablesHeap.CustomAttributeTable.Create();
var ivtCARow = new RawCustomAttributeRow(CodedToken.HasCustomAttribute.Encode(new MDToken(Table.Assembly, 1)),
CodedToken.CustomAttributeType.Encode(new MDToken(Table.MemberRef, ivtCtorRid)),
mdEditor.BlobHeap.Create(MDPatcherUtils.CreateIVTBlob(tempAssembly)));
mdEditor.TablesHeap.CustomAttributeTable.Set(ivtCARid, ref ivtCARow);
}
void ReadTypeDefOrRef()
{
var start = currPos;
uint codedToken = ReadCompressedUInt32();
uint compressedLen = (uint)(currPos - start);
if (!CodedToken.TypeDefOrRef.Decode(codedToken, out MDToken token))
{
ThrowInvalidSignatureException();
}
if (!remappedTypeTokens.TryGetValue(token.Raw, out uint newToken))
{
return;
}
uint newCodedToken = CodedToken.TypeDefOrRef.Encode(newToken);
uint newCodedTokenLen = (uint)MDPatcherUtils.GetCompressedUInt32Length(newCodedToken);
if (usingBuilder || newCodedTokenLen != compressedLen)
{
SwitchToBuilder(compressedLen);
WriteCompressedUInt32(newCodedToken);
}
else
{
currPos = start;
WriteCompressedUInt32(newCodedToken);
}
}
public unsafe bool Patch(ModuleDef module, out RawModuleBytes newModuleData)
{
var moduleData = this.moduleData;
// NOTE: We can't remove the type from the corlib (eg. mscorlib) because the compiler
// (Roslyn) won't recognize it as the corlib if it has any AssemblyRefs.
// A possible fix is to add a new netmodule to the corlib assembly.
bool fixTypeDefRefs = !(nonNestedEditedType is null) &&
MDPatcherUtils.ExistsInMetadata(nonNestedEditedType) &&
MDPatcherUtils.ReferencesModule(module, nonNestedEditedType?.Module) &&
!module.Assembly.IsCorLib();
bool addIVT = module == editedModule || MDPatcherUtils.HasModuleInternalAccess(module, editedModule);
if (fixTypeDefRefs || addIVT)
{
DnSpyEventSource.Log.EditCodePatchModuleStart(module.Location);
using (var md = MDPatcherUtils.TryCreateMetadata(moduleData, isFileLayout)) {
if (md is null)
{
throw new InvalidOperationException("Couldn't create metadata");
}
var mdEditor = new MetadataEditor(moduleData, md);
var options = MDEditorPatcherOptions.None;
if (fixTypeDefRefs)
{
options |= MDEditorPatcherOptions.UpdateTypeReferences;
}
if (addIVT)
{
options |= MDEditorPatcherOptions.AllowInternalAccess;
}
var patcher = new MDEditorPatcher(moduleData, mdEditor, tempAssembly, nonNestedEditedType, options);
patcher.Patch(module);
if (mdEditor.MustRewriteMetadata())
{
var stream = new MDWriterMemoryStream();
new MDWriter(moduleData, mdEditor, stream).Write();
NativeMemoryRawModuleBytes?newRawData = null;
try {
newRawData = new NativeMemoryRawModuleBytes((int)stream.Length, isFileLayout: true);
stream.CopyTo((IntPtr)newRawData.Pointer, newRawData.Size);
moduleData = newRawData;
}
catch {
newRawData?.Dispose();
throw;
}
}
}
DnSpyEventSource.Log.EditCodePatchModuleStop(module.Location);
}
newModuleData = moduleData;
return(true);
}
MDSigPatcher(List <byte> sigBuilder, RemappedTypeTokens remappedTypeTokens, RawModuleBytes moduleData, uint blobOffset, uint sigOffset)
{
this.sigBuilder = sigBuilder;
this.remappedTypeTokens = remappedTypeTokens;
currPos = (byte *)moduleData.Pointer + blobOffset + sigOffset;
uint size = MDPatcherUtils.ReadCompressedUInt32(ref currPos, (byte *)moduleData.Pointer + moduleData.Size);
startPos = currPos;
endPos = currPos + size;
usingBuilder = false;
recursionCounter = 0;
}
MDSigPatcher(List <byte> sigBuilder, Dictionary <uint, uint> remappedTypeTokens, byte[] moduleData, uint blobOffset, uint sigOffset)
{
this.sigBuilder = sigBuilder;
this.remappedTypeTokens = remappedTypeTokens;
this.moduleData = moduleData;
startOffset = blobOffset + sigOffset;
uint size = MDPatcherUtils.ReadCompressedUInt32(moduleData, ref startOffset);
endOffset = startOffset + size;
currOffset = startOffset;
usingBuilder = false;
recursionCounter = 0;
}
public unsafe bool Patch(ModuleDef module, out RawModuleBytes newModuleData)
{
var moduleData = this.moduleData;
// NOTE: We can't remove the type from the corlib (eg. mscorlib) because the compiler
// (Roslyn) won't recognize it as the corlib if it has any AssemblyRefs.
// A possible fix is to add a new netmodule to the corlib assembly.
bool fixTypeDefRefs = nonNestedEditedTypeOrNull != null &&
MDPatcherUtils.ExistsInMetadata(nonNestedEditedTypeOrNull) &&
MDPatcherUtils.ReferencesModule(module, nonNestedEditedTypeOrNull?.Module) &&
!module.Assembly.IsCorLib();
if (makeEverythingPublic || fixTypeDefRefs)
{
using (var md = MDPatcherUtils.TryCreateMetadata(moduleData, isFileLayout)) {
if (makeEverythingPublic)
{
new MetadataFixer(moduleData, md).MakePublic();
}
if (fixTypeDefRefs)
{
var mdEditor = new MetadataEditor(moduleData, md);
var patcher = new MDEditorPatcher(moduleData, mdEditor, tempAssembly, nonNestedEditedTypeOrNull);
patcher.Patch(module);
if (mdEditor.MustRewriteMetadata())
{
var stream = new MDWriterMemoryStream();
new MDWriter(moduleData, mdEditor, stream).Write();
NativeMemoryRawModuleBytes newRawData = null;
try {
newRawData = new NativeMemoryRawModuleBytes((int)stream.Length);
stream.CopyTo((IntPtr)newRawData.Pointer, newRawData.Size);
moduleData = newRawData;
}
catch {
newRawData?.Dispose();
throw;
}
}
}
}
}
newModuleData = moduleData;
return(true);
}
void DeleteTypeDef(MetadataEditor mdEditor, TypeDef nonNestedTypeDef)
{
Debug.Assert(nonNestedTypeDef.DeclaringType == null);
var dict = new Dictionary <TypeDef, (TypeDef Type, uint TypeRefRid, RawTypeRefRow TypeRefRow)>();
foreach (var type in MDPatcherUtils.GetMetadataTypes(nonNestedTypeDef))
{
var typeRefRid = mdEditor.TablesHeap.TypeRefTable.Create();
remappedTypeTokens.Add(type.MDToken.Raw, new MDToken(Table.TypeRef, typeRefRid).Raw);
// Remove the type by renaming it and making it private/internal
var tdRow = mdEditor.TablesHeap.TypeDefTable.Get(type.Rid);
var flags = tdRow.Flags;
if ((flags & 7) <= 1)
{
flags = flags & ~7U; // NotPublic
}
else
{
flags = (flags & ~7U) | 3; // NestedPrivate
}
var deletedType = (Type : type, TypeRefRid : typeRefRid, TypeRefRow : new RawTypeRefRow(0, tdRow.Name, tdRow.Namespace));
tdRow = new RawTypeDefRow(flags, mdEditor.StringsHeap.Create(Guid.NewGuid().ToString()), mdEditor.StringsHeap.Create(string.Empty), tdRow.Extends, tdRow.FieldList, tdRow.MethodList);
mdEditor.TablesHeap.TypeDefTable.Set(type.Rid, ref tdRow);
dict.Add(type, deletedType);
}
remappedTypeTokens.SetReadOnly();
foreach (var kv in dict)
{
var deletedType = kv.Value;
uint resolutionScope;
if (deletedType.Type.DeclaringType != null)
{
var declType = dict[deletedType.Type.DeclaringType];
resolutionScope = CodedToken.ResolutionScope.Encode(new MDToken(Table.TypeRef, declType.TypeRefRid));
}
else
{
resolutionScope = CodedToken.ResolutionScope.Encode(new MDToken(Table.AssemblyRef, GetOrCreateTempAssemblyRid()));
}
deletedType.TypeRefRow = new RawTypeRefRow(resolutionScope, deletedType.TypeRefRow.Name, deletedType.TypeRefRow.Namespace);
mdEditor.TablesHeap.TypeRefTable.Set(deletedType.TypeRefRid, ref deletedType.TypeRefRow);
}
}
static bool HasInternalsVisibleToAttribute(ModuleDef targetModule, ModuleDef sourceModule)
{
var targetAssembly = targetModule.Assembly;
if (targetAssembly == null)
{
return(false);
}
var sourceAssembly = sourceModule.Assembly;
if (sourceAssembly == null)
{
return(false);
}
foreach (var ca in targetAssembly.CustomAttributes)
{
if (ca.ConstructorArguments.Count != 1)
{
continue;
}
if (!MDPatcherUtils.CheckTypeDefOrTypeRefName(ca.Constructor?.DeclaringType, nameSystem_Runtime_CompilerServices, nameInternalsVisibleToAttribute))
{
continue;
}
var asmName = (ca.ConstructorArguments[0].Value as UTF8String)?.String;
if (asmName == null)
{
continue;
}
int index = asmName.IndexOf(',');
if (index >= 0)
{
asmName = asmName.Substring(0, index);
}
asmName = asmName.Trim();
if (!StringComparer.OrdinalIgnoreCase.Equals(sourceAssembly.Name.String, asmName))
{
continue;
}
return(true);
}
return(false);
}
public bool Patch(ModuleDef module, out byte[] newModuleData)
{
var moduleData = this.moduleData;
// NOTE: We can't remove the type from the corlib (eg. mscorlib) because the compiler
// (Roslyn) won't recognize it as the corlib if it has any AssemblyRefs.
// A possible fix is to add a new netmodule to the corlib assembly.
bool fixTypeDefRefs = nonNestedEditedTypeOrNull != null &&
MDPatcherUtils.ExistsInMetadata(nonNestedEditedTypeOrNull) &&
MDPatcherUtils.ReferencesModule(module, nonNestedEditedTypeOrNull?.Module) &&
!module.Assembly.IsCorLib();
if (makeEverythingPublic || fixTypeDefRefs)
{
using (var md = MDPatcherUtils.TryCreateMetadata(moduleData)) {
if (makeEverythingPublic)
{
bool success = new MetadataFixer(moduleData, md).MakePublic();
if (!success)
{
newModuleData = null;
return(false);
}
}
if (fixTypeDefRefs)
{
var mdEditor = new MetadataEditor(moduleData, md);
var patcher = new MDEditorPatcher(moduleData, mdEditor, tempAssembly, nonNestedEditedTypeOrNull);
patcher.Patch(module);
if (mdEditor.MustRewriteMetadata())
{
var stream = new MDWriterMemoryStream();
new MDWriter(moduleData, mdEditor, stream).Write();
moduleData = stream.ToArray();
}
}
}
}
newModuleData = moduleData;
return(true);
}
MDSigPatcher(List <byte> sigBuilder, RemappedTypeTokens remappedTypeTokens, RawModuleBytes moduleData, uint blobOffset, uint sigOffset)
{
if ((ulong)blobOffset + sigOffset > (ulong)moduleData.Size)
{
ThrowInvalidSignatureException();
}
this.sigBuilder = sigBuilder;
this.remappedTypeTokens = remappedTypeTokens;
currPos = (byte *)moduleData.Pointer + blobOffset + sigOffset;
uint size = MDPatcherUtils.ReadCompressedUInt32(ref currPos, (byte *)moduleData.Pointer + moduleData.Size);
startPos = currPos;
endPos = currPos + size;
if ((ulong)(endPos - (byte *)moduleData.Pointer) > (ulong)moduleData.Size)
{
ThrowInvalidSignatureException();
}
usingBuilder = false;
recursionCounter = 0;
}
