//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------ namespace System.Runtime.Serialization { using System; using System.Collections; using System.Diagnostics; using System.Globalization; using System.IO; using System.Reflection; using System.Text; using System.Xml; using DataContractDictionary = System.Collections.Generic.Dictionary; using System.Collections.Generic; using System.Runtime.Serialization.Diagnostics.Application; using System.Runtime.Serialization.Formatters; using System.Security; using System.Security.Permissions; using System.Runtime.CompilerServices; #if USE_REFEMIT public class XmlObjectSerializerReadContextComplex : XmlObjectSerializerReadContext #else internal class XmlObjectSerializerReadContextComplex : XmlObjectSerializerReadContext #endif { static Hashtable dataContractTypeCache = new Hashtable(); bool preserveObjectReferences; protected IDataContractSurrogate dataContractSurrogate; SerializationMode mode; SerializationBinder binder; ISurrogateSelector surrogateSelector; FormatterAssemblyStyle assemblyFormat; Hashtable surrogateDataContracts; internal XmlObjectSerializerReadContextComplex(DataContractSerializer serializer, DataContract rootTypeDataContract, DataContractResolver dataContractResolver) : base(serializer, rootTypeDataContract, dataContractResolver) { this.mode = SerializationMode.SharedContract; this.preserveObjectReferences = serializer.PreserveObjectReferences; this.dataContractSurrogate = serializer.DataContractSurrogate; } internal XmlObjectSerializerReadContextComplex(NetDataContractSerializer serializer) : base(serializer) { this.mode = SerializationMode.SharedType; this.preserveObjectReferences = true; this.binder = serializer.Binder; this.surrogateSelector = serializer.SurrogateSelector; this.assemblyFormat = serializer.AssemblyFormat; } internal XmlObjectSerializerReadContextComplex(XmlObjectSerializer serializer, int maxItemsInObjectGraph, StreamingContext streamingContext, bool ignoreExtensionDataObject) : base(serializer, maxItemsInObjectGraph, streamingContext, ignoreExtensionDataObject) { } internal override SerializationMode Mode { get { return mode; } } internal override DataContract GetDataContract(int id, RuntimeTypeHandle typeHandle) { DataContract dataContract = null; if (mode == SerializationMode.SharedType && surrogateSelector != null) { dataContract = NetDataContractSerializer.GetDataContractFromSurrogateSelector(surrogateSelector, GetStreamingContext(), typeHandle, null /*type*/, ref surrogateDataContracts); } if (dataContract != null) { if (this.IsGetOnlyCollection && dataContract is SurrogateDataContract) { throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.SurrogatesWithGetOnlyCollectionsNotSupportedSerDeser, DataContract.GetClrTypeFullName(dataContract.UnderlyingType)))); } return dataContract; } return base.GetDataContract(id, typeHandle); } internal override DataContract GetDataContract(RuntimeTypeHandle typeHandle, Type type) { DataContract dataContract = null; if (mode == SerializationMode.SharedType && surrogateSelector != null) { dataContract = NetDataContractSerializer.GetDataContractFromSurrogateSelector(surrogateSelector, GetStreamingContext(), typeHandle, type, ref surrogateDataContracts); } if (dataContract != null) { if (this.IsGetOnlyCollection && dataContract is SurrogateDataContract) { throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.SurrogatesWithGetOnlyCollectionsNotSupportedSerDeser, DataContract.GetClrTypeFullName(dataContract.UnderlyingType)))); } return dataContract; } return base.GetDataContract(typeHandle, type); } public override object InternalDeserialize(XmlReaderDelegator xmlReader, int declaredTypeID, RuntimeTypeHandle declaredTypeHandle, string name, string ns) { if (mode == SerializationMode.SharedContract) { if (dataContractSurrogate == null) return base.InternalDeserialize(xmlReader, declaredTypeID, declaredTypeHandle, name, ns); else return InternalDeserializeWithSurrogate(xmlReader, Type.GetTypeFromHandle(declaredTypeHandle), null /*surrogateDataContract*/, name, ns); } else { return InternalDeserializeInSharedTypeMode(xmlReader, declaredTypeID, Type.GetTypeFromHandle(declaredTypeHandle), name, ns); } } internal override object InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, string name, string ns) { if (mode == SerializationMode.SharedContract) { if (dataContractSurrogate == null) return base.InternalDeserialize(xmlReader, declaredType, name, ns); else return InternalDeserializeWithSurrogate(xmlReader, declaredType, null /*surrogateDataContract*/, name, ns); } else { return InternalDeserializeInSharedTypeMode(xmlReader, -1, declaredType, name, ns); } } internal override object InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, string name, string ns) { if (mode == SerializationMode.SharedContract) { if (dataContractSurrogate == null) return base.InternalDeserialize(xmlReader, declaredType, dataContract, name, ns); else return InternalDeserializeWithSurrogate(xmlReader, declaredType, dataContract, name, ns); } else { return InternalDeserializeInSharedTypeMode(xmlReader, -1, declaredType, name, ns); } } object InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, int declaredTypeID, Type declaredType, string name, string ns) { object retObj = null; if (TryHandleNullOrRef(xmlReader, declaredType, name, ns, ref retObj)) return retObj; DataContract dataContract; string assemblyName = attributes.ClrAssembly; string typeName = attributes.ClrType; if (assemblyName != null && typeName != null) { Assembly assembly; Type type; dataContract = ResolveDataContractInSharedTypeMode(assemblyName, typeName, out assembly, out type); if (dataContract == null) { if (assembly == null) throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.AssemblyNotFound, assemblyName))); if (type == null) throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ClrTypeNotFound, assembly.FullName, typeName))); } //Array covariance is not supported in XSD. If declared type is array, data is sent in format of base array if (declaredType != null && declaredType.IsArray) dataContract = (declaredTypeID < 0) ? GetDataContract(declaredType) : GetDataContract(declaredTypeID, declaredType.TypeHandle); } else { if (assemblyName != null) throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(XmlObjectSerializer.TryAddLineInfo(xmlReader, SR.GetString(SR.AttributeNotFound, Globals.SerializationNamespace, Globals.ClrTypeLocalName, xmlReader.NodeType, xmlReader.NamespaceURI, xmlReader.LocalName)))); else if (typeName != null) throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(XmlObjectSerializer.TryAddLineInfo(xmlReader, SR.GetString(SR.AttributeNotFound, Globals.SerializationNamespace, Globals.ClrAssemblyLocalName, xmlReader.NodeType, xmlReader.NamespaceURI, xmlReader.LocalName)))); else if (declaredType == null) throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(XmlObjectSerializer.TryAddLineInfo(xmlReader, SR.GetString(SR.AttributeNotFound, Globals.SerializationNamespace, Globals.ClrTypeLocalName, xmlReader.NodeType, xmlReader.NamespaceURI, xmlReader.LocalName)))); dataContract = (declaredTypeID < 0) ? GetDataContract(declaredType) : GetDataContract(declaredTypeID, declaredType.TypeHandle); } return ReadDataContractValue(dataContract, xmlReader); } object InternalDeserializeWithSurrogate(XmlReaderDelegator xmlReader, Type declaredType, DataContract surrogateDataContract, string name, string ns) { if (TD.DCDeserializeWithSurrogateStartIsEnabled()) { TD.DCDeserializeWithSurrogateStart(declaredType.FullName); } DataContract dataContract = surrogateDataContract ?? GetDataContract(DataContractSurrogateCaller.GetDataContractType(dataContractSurrogate, declaredType)); if (this.IsGetOnlyCollection && dataContract.UnderlyingType != declaredType) { throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.SurrogatesWithGetOnlyCollectionsNotSupportedSerDeser, DataContract.GetClrTypeFullName(declaredType)))); } ReadAttributes(xmlReader); string objectId = GetObjectId(); object oldObj = InternalDeserialize(xmlReader, name, ns, declaredType, ref dataContract); object obj = DataContractSurrogateCaller.GetDeserializedObject(dataContractSurrogate, oldObj, dataContract.UnderlyingType, declaredType); ReplaceDeserializedObject(objectId, oldObj, obj); if (TD.DCDeserializeWithSurrogateStopIsEnabled()) { TD.DCDeserializeWithSurrogateStop(); } return obj; } Type ResolveDataContractTypeInSharedTypeMode(string assemblyName, string typeName, out Assembly assembly) { assembly = null; Type type = null; if (binder != null) type = binder.BindToType(assemblyName, typeName); if (type == null) { XmlObjectDataContractTypeKey key = new XmlObjectDataContractTypeKey(assemblyName, typeName); XmlObjectDataContractTypeInfo dataContractTypeInfo = (XmlObjectDataContractTypeInfo)dataContractTypeCache[key]; if (dataContractTypeInfo == null) { if (assemblyFormat == FormatterAssemblyStyle.Full) { if (assemblyName == Globals.MscorlibAssemblyName) { assembly = Globals.TypeOfInt.Assembly; } else { assembly = Assembly.Load(assemblyName); } if (assembly != null) type = assembly.GetType(typeName); } else { assembly = XmlObjectSerializerReadContextComplex.ResolveSimpleAssemblyName(assemblyName); if (assembly != null) { // Catching any exceptions that could be thrown from a failure on assembly load // This is necessary, for example, if there are generic parameters that are qualified with a version of the assembly that predates the one available try { type = assembly.GetType(typeName); } catch (TypeLoadException) { } catch (FileNotFoundException) { } catch (FileLoadException) { } catch (BadImageFormatException) { } if (type == null) { type = Type.GetType(typeName, XmlObjectSerializerReadContextComplex.ResolveSimpleAssemblyName, new TopLevelAssemblyTypeResolver(assembly).ResolveType, false /* throwOnError */); } } } if (type != null) { CheckTypeForwardedTo(assembly, type.Assembly, type); dataContractTypeInfo = new XmlObjectDataContractTypeInfo(assembly, type); lock (dataContractTypeCache) { if (!dataContractTypeCache.ContainsKey(key)) { dataContractTypeCache[key] = dataContractTypeInfo; } } } } else { assembly = dataContractTypeInfo.Assembly; type = dataContractTypeInfo.Type; } } return type; } DataContract ResolveDataContractInSharedTypeMode(string assemblyName, string typeName, out Assembly assembly, out Type type) { type = ResolveDataContractTypeInSharedTypeMode(assemblyName, typeName, out assembly); if (type != null) { return GetDataContract(type); } return null; } protected override DataContract ResolveDataContractFromTypeName() { if (mode == SerializationMode.SharedContract) { return base.ResolveDataContractFromTypeName(); } else { if (attributes.ClrAssembly != null && attributes.ClrType != null) { Assembly assembly; Type type; return ResolveDataContractInSharedTypeMode(attributes.ClrAssembly, attributes.ClrType, out assembly, out type); } } return null; } [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of ISurrogateSelector", Safe = "Demands for FullTrust")] [SecuritySafeCritical] [PermissionSet(SecurityAction.Demand, Unrestricted = true)] [MethodImpl(MethodImplOptions.NoInlining)] bool CheckIfTypeSerializableForSharedTypeMode(Type memberType) { Fx.Assert(surrogateSelector != null, "Method should not be called when surrogateSelector is null."); ISurrogateSelector surrogateSelectorNotUsed; return (surrogateSelector.GetSurrogate(memberType, GetStreamingContext(), out surrogateSelectorNotUsed) != null); } internal override void CheckIfTypeSerializable(Type memberType, bool isMemberTypeSerializable) { if (mode == SerializationMode.SharedType && surrogateSelector != null && CheckIfTypeSerializableForSharedTypeMode(memberType)) { return; } else { if (dataContractSurrogate != null) { while (memberType.IsArray) memberType = memberType.GetElementType(); memberType = DataContractSurrogateCaller.GetDataContractType(dataContractSurrogate, memberType); if (!DataContract.IsTypeSerializable(memberType)) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.TypeNotSerializable, memberType))); return; } } base.CheckIfTypeSerializable(memberType, isMemberTypeSerializable); } internal override Type GetSurrogatedType(Type type) { if (dataContractSurrogate == null) { return base.GetSurrogatedType(type); } else { type = DataContract.UnwrapNullableType(type); Type surrogateType = DataContractSerializer.GetSurrogatedType(dataContractSurrogate, type); if (this.IsGetOnlyCollection && surrogateType != type) { throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.SurrogatesWithGetOnlyCollectionsNotSupportedSerDeser, DataContract.GetClrTypeFullName(type)))); } else { return surrogateType; } } } #if USE_REFEMIT public override int GetArraySize() #else internal override int GetArraySize() #endif { return preserveObjectReferences ? attributes.ArraySZSize : -1; } static Assembly ResolveSimpleAssemblyName(AssemblyName assemblyName) { return ResolveSimpleAssemblyName(assemblyName.FullName); } static Assembly ResolveSimpleAssemblyName(string assemblyName) { Assembly assembly; if (assemblyName == Globals.MscorlibAssemblyName) { assembly = Globals.TypeOfInt.Assembly; } else { assembly = Assembly.LoadWithPartialName(assemblyName); if (assembly == null) { AssemblyName an = new AssemblyName(assemblyName); an.Version = null; assembly = Assembly.LoadWithPartialName(an.FullName); } } return assembly; } [Fx.Tag.SecurityNote(Critical = "Gets the SecurityCritical PermissionSet for sourceAssembly and destinationAssembly.", Safe = "Doesn't leak anything.")] [SecuritySafeCritical] static void CheckTypeForwardedTo(Assembly sourceAssembly, Assembly destinationAssembly, Type resolvedType) { if (sourceAssembly != destinationAssembly && !NetDataContractSerializer.UnsafeTypeForwardingEnabled && !sourceAssembly.IsFullyTrusted) { #if !NO_DESKTOP_SECURITY // We have a TypeForwardedTo attribute if (!destinationAssembly.PermissionSet.IsSubsetOf(sourceAssembly.PermissionSet)) { // We look for a matching TypeForwardedFrom attribute TypeInformation typeInfo = NetDataContractSerializer.GetTypeInformation(resolvedType); if (typeInfo.HasTypeForwardedFrom) { Assembly typeForwardedFromAssembly = null; try { // if this Assembly.Load fails, we still want to throw security exception typeForwardedFromAssembly = Assembly.Load(typeInfo.AssemblyString); } catch { } if (typeForwardedFromAssembly == sourceAssembly) { return; } } throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.CannotDeserializeForwardedType, DataContract.GetClrTypeFullName(resolvedType)))); } #endif } } sealed class TopLevelAssemblyTypeResolver { Assembly topLevelAssembly; public TopLevelAssemblyTypeResolver(Assembly topLevelAssembly) { this.topLevelAssembly = topLevelAssembly; } public Type ResolveType(Assembly assembly, string simpleTypeName, bool ignoreCase) { if (assembly == null) assembly = topLevelAssembly; return assembly.GetType(simpleTypeName, false, ignoreCase); } } class XmlObjectDataContractTypeInfo { Assembly assembly; Type type; public XmlObjectDataContractTypeInfo(Assembly assembly, Type type) { this.assembly = assembly; this.type = type; } public Assembly Assembly { get { return this.assembly; } } public Type Type { get { return this.type; } } } class XmlObjectDataContractTypeKey { string assemblyName; string typeName; public XmlObjectDataContractTypeKey(string assemblyName, string typeName) { this.assemblyName = assemblyName; this.typeName = typeName; } public override bool Equals(object obj) { if (object.ReferenceEquals(this, obj)) return true; XmlObjectDataContractTypeKey other = obj as XmlObjectDataContractTypeKey; if (other == null) return false; if (this.assemblyName != other.assemblyName) return false; if (this.typeName != other.typeName) return false; return true; } public override int GetHashCode() { int hashCode = 0; if (this.assemblyName != null) hashCode = this.assemblyName.GetHashCode(); if (this.typeName != null) hashCode ^= this.typeName.GetHashCode(); return hashCode; } } } }