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author | dotnet-bot <dotnet-bot@microsoft.com> | 2015-01-30 14:14:42 -0800 |
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committer | dotnet-bot <dotnet-bot@microsoft.com> | 2015-01-30 14:14:42 -0800 |
commit | ef1e2ab328087c61a6878c1e84f4fc5d710aebce (patch) | |
tree | dee1bbb89e9d722e16b0d1485e3cdd1b6c8e2cfa /src/vm/securityattributes.cpp | |
download | coreclr-ef1e2ab328087c61a6878c1e84f4fc5d710aebce.tar.gz coreclr-ef1e2ab328087c61a6878c1e84f4fc5d710aebce.tar.bz2 coreclr-ef1e2ab328087c61a6878c1e84f4fc5d710aebce.zip |
Initial commit to populate CoreCLR repo
[tfs-changeset: 1407945]
Diffstat (limited to 'src/vm/securityattributes.cpp')
-rw-r--r-- | src/vm/securityattributes.cpp | 2765 |
1 files changed, 2765 insertions, 0 deletions
diff --git a/src/vm/securityattributes.cpp b/src/vm/securityattributes.cpp new file mode 100644 index 0000000000..8ca316c5b5 --- /dev/null +++ b/src/vm/securityattributes.cpp @@ -0,0 +1,2765 @@ +// +// Copyright (c) Microsoft. All rights reserved. +// Licensed under the MIT license. See LICENSE file in the project root for full license information. +// +// + +// + + +#include "common.h" + +#include "security.h" +#include "field.h" +#include "comcallablewrapper.h" +#include "typeparse.h" +#include "appdomain.inl" +#include "mdaassistants.h" +#include "fstring.h" + + +HRESULT BlobToAttributeSet(BYTE* pBuffer, ULONG cbBuffer, CORSEC_ATTRSET* pAttrSet, DWORD dwAction); + +#ifndef CROSSGEN_COMPILE + +OBJECTREF SecurityAttributes::CreatePermissionSet(BOOL fTrusted) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + OBJECTREF pPermSet = NULL; + GCPROTECT_BEGIN(pPermSet); + + MethodTable* pMT = MscorlibBinder::GetClass(CLASS__PERMISSION_SET); + pPermSet = (OBJECTREF) AllocateObject(pMT); + + ARG_SLOT fStatus = (fTrusted) ? 1 : 0; + + MethodDescCallSite ctor(METHOD__PERMISSION_SET__CTOR); + + ARG_SLOT arg[2] = { + ObjToArgSlot(pPermSet), + BoolToArgSlot(fStatus) + }; + ctor.Call(arg); + + GCPROTECT_END(); + + return pPermSet; +} + +#ifdef FEATURE_CAS_POLICY + +// todo: remove the non-cas parameters (because they're bogus now anyway) +void SecurityAttributes::XmlToPermissionSet(PBYTE pbXmlBlob, + DWORD cbXmlBlob, + OBJECTREF* pPermSet, + OBJECTREF* pEncoding, + PBYTE pbNonCasXmlBlob, + DWORD cbNonCasXmlBlob, + OBJECTREF* pNonCasPermSet, + OBJECTREF* pNonCasEncoding) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + PRECONDITION(IsProtectedByGCFrame (pPermSet)); + PRECONDITION(IsProtectedByGCFrame (pEncoding)); + PRECONDITION(IsProtectedByGCFrame (pNonCasPermSet)); + PRECONDITION(IsProtectedByGCFrame (pNonCasEncoding)); + } CONTRACTL_END; + + // Get Host Protection Flags + EApiCategories eProtectedCategories = GetHostProtectionManager()->GetProtectedCategories(); + + MethodDescCallSite decodeXML(METHOD__PERMISSION_SET__DECODE_XML, pPermSet); // can trigger GC + + // Deserialize the CAS PermissionSet + if(pbXmlBlob && cbXmlBlob > 0) + { + _ASSERTE(*pbXmlBlob != LAZY_DECL_SEC_FLAG); + + // Create a new (empty) permission set. + *pPermSet = SecurityAttributes::CreatePermissionSet(FALSE); + + // Buffer in managed space. + SecurityAttributes::CopyEncodingToByteArray(pbXmlBlob, cbXmlBlob, pEncoding); + + ARG_SLOT args[] = { + ObjToArgSlot(*pPermSet), + ObjToArgSlot(*pEncoding), + (ARG_SLOT)eProtectedCategories, + (ARG_SLOT)0, + }; + + // Deserialize into a managed object. + BOOL success = FALSE; + EX_TRY + { + // Elevate thread's allowed loading level. This can cause load failures if assemblies loaded from this point on require + // any assemblies currently being loaded. + OVERRIDE_LOAD_LEVEL_LIMIT(FILE_ACTIVE); + OVERRIDE_TYPE_LOAD_LEVEL_LIMIT(CLASS_LOADED); + success = decodeXML.Call_RetBool(args); + } + EX_SWALLOW_NONTERMINAL + + if (!success) + COMPlusThrow(kSecurityException, IDS_ENCODEDPERMSET_DECODEFAILURE); + } + + // Deserialize the non-CAS PermissionSet + if(pbNonCasXmlBlob && cbNonCasXmlBlob > 0) + { + _ASSERTE(*pbNonCasXmlBlob != LAZY_DECL_SEC_FLAG); + + // Create a new (empty) permission set. + *pNonCasPermSet = SecurityAttributes::CreatePermissionSet(FALSE); + + // Buffer in managed space. + SecurityAttributes::CopyEncodingToByteArray(pbNonCasXmlBlob, cbNonCasXmlBlob, pNonCasEncoding); + + ARG_SLOT args[] = { + ObjToArgSlot(*pNonCasPermSet), + ObjToArgSlot(*pNonCasEncoding), + (ARG_SLOT)eProtectedCategories, + (ARG_SLOT)0, + }; + + // Deserialize into a managed object. + BOOL success = FALSE; + EX_TRY + { + // Elevate thread's allowed loading level. This can cause load failures if assemblies loaded from this point on require + // any assemblies currently being loaded. + OVERRIDE_LOAD_LEVEL_LIMIT(FILE_ACTIVE); + OVERRIDE_TYPE_LOAD_LEVEL_LIMIT(CLASS_LOADED); + success = decodeXML.Call_RetBool(args); + } + EX_SWALLOW_NONTERMINAL + + if (!success) + COMPlusThrow(kSecurityException, IDS_ENCODEDPERMSET_DECODEFAILURE); + } +} + +#endif // FEATURE_CAS_POLICY + +// +// Determine if a security action allows an optimization where an empty permission set can be represented as +// NULL. Some VM optimizations kick in if an empty permission set can be represented as NULL; however since +// some security actions have a semantic difference between not being specified at all and having an explicit +// empty permission set specified, permission sets associated with those actions must be represented as an +// empty object rather than as NULL. +// +// Arguments: +// action - security action to check +// +// Return Value: +// true if the security action may have an empty permission set optimized to NULL, false otherwise +// +// Notes: +// The security actions which cannot have NULL represent an empty permission set are: +// +// * PermitOnly - a PermitOnly set containing no permissions means that all demands should fail, as +// opposed to not having a PermitOnly set on a method. +// * RequestOptional - not specifying a RequestOptional set is equivilent to having a RequestOptional set +// of FullTrust, rather than having an empty RequestOptional set. +// + +// static +bool SecurityAttributes::ActionAllowsNullPermissionSet(CorDeclSecurity action) +{ + LIMITED_METHOD_CONTRACT; + return action != dclPermitOnly && action != dclRequestOptional; +} + +#ifdef FEATURE_CAS_POLICY + +PsetCacheEntry* SecurityAttributes::MergePermissionSets(IN PsetCacheEntry *pPCE1, IN PsetCacheEntry *pPCE2, IN bool fIntersect, DWORD dwAction) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + SecurityDeclarativeCache *pSDC; + PsetCacheEntry* pMergedPCE; + + struct _gc { + OBJECTREF orSet1; + OBJECTREF orSet2; + OBJECTREF orMergedSet; + } gc; + memset(&gc, '\0', sizeof(gc)); + GCPROTECT_BEGIN(gc); + { + // Union or Intersect the two PermissionSets + gc.orSet1 = pPCE1->CreateManagedPsetObject (dwAction); + + if(gc.orSet1 == NULL) + pMergedPCE = fIntersect ? pPCE1 : pPCE2; + else + { + gc.orSet2 = pPCE2->CreateManagedPsetObject (dwAction); + if(gc.orSet2 == NULL) + pMergedPCE = fIntersect ? pPCE2 : pPCE1; + else + { + BinderMethodID methID = (fIntersect ? METHOD__PERMISSION_SET__INTERSECT : METHOD__PERMISSION_SET__UNION); + MethodDescCallSite mergeMethod(methID, &gc.orSet1); + + ARG_SLOT args[2] = { + ObjToArgSlot(gc.orSet1), + ObjToArgSlot(gc.orSet2), + }; + gc.orMergedSet = mergeMethod.Call_RetOBJECTREF(args); + + if(gc.orMergedSet == NULL) + gc.orMergedSet = CreatePermissionSet(false); + + // Convert to XML blob + PBYTE pbData; + DWORD cbData; + EncodePermissionSet(&gc.orMergedSet, &pbData, &cbData); + + // Store XML blob and obtain an index to reference it + pSDC = &(GetAppDomain()->m_pSecContext->m_pSecurityDeclarativeCache); + pMergedPCE = pSDC->CreateAndCachePset (pbData, cbData); + + } + } + } + GCPROTECT_END(); + + return pMergedPCE; +} + +#endif // FEATURE_CAS_POLICY + +void SecurityAttributes::CopyEncodingToByteArray(IN PBYTE pbData, + IN DWORD cbData, + OUT OBJECTREF* pArray) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + U1ARRAYREF pObj; + _ASSERTE(pArray); + + pObj = (U1ARRAYREF)AllocatePrimitiveArray(ELEMENT_TYPE_U1,cbData); + memcpyNoGCRefs(pObj->m_Array, pbData, cbData); + *pArray = (OBJECTREF) pObj; +} + +void SecurityAttributes::CopyByteArrayToEncoding(IN U1ARRAYREF* pArray, + OUT PBYTE* ppbData, + OUT DWORD* pcbData) +{ + CONTRACTL { + THROWS; + GC_NOTRIGGER; + MODE_COOPERATIVE; + PRECONDITION(CheckPointer(pArray)); + PRECONDITION(CheckPointer(ppbData)); + PRECONDITION(CheckPointer(pcbData)); + PRECONDITION(*pArray != NULL); + } CONTRACTL_END; + + DWORD size = (DWORD) (*pArray)->GetNumComponents(); + *ppbData = new BYTE[size]; + *pcbData = size; + + CopyMemory(*ppbData, (*pArray)->GetDirectPointerToNonObjectElements(), size); +} + +#ifdef FEATURE_CAS_POLICY +void SecurityAttributes::EncodePermissionSet(IN OBJECTREF* pRef, + OUT PBYTE* ppbData, + OUT DWORD* pcbData) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + PRECONDITION(IsProtectedByGCFrame (pRef)); + } CONTRACTL_END; + + MethodDescCallSite encodeXML(METHOD__PERMISSION_SET__ENCODE_XML); + + // Encode up the result + ARG_SLOT args1[1]; + args1[0] = ObjToArgSlot(*pRef); + OBJECTREF pByteArray = NULL; + pByteArray = encodeXML.Call_RetOBJECTREF(args1); + + SecurityAttributes::CopyByteArrayToEncoding((U1ARRAYREF*) &pByteArray, + ppbData, + pcbData); +} +#endif // FEATURE_CAS_POLICY + +#ifdef FEATURE_CAS_POLICY +static void SetupRestrictSecAttributes() +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + EX_TRY + { + MethodDescCallSite setupSecurity(METHOD__PERMISSION_SET__SETUP_SECURITY); + + setupSecurity.Call(NULL); + } + EX_CATCH + { + // There is a possibility that we've already set the appdomain policy + // level for this process. In that case we'll get a policy exception + // that we are free to ignore. + OBJECTREF pThrowable = GET_THROWABLE(); + DefineFullyQualifiedNameForClassOnStack(); + LPCUTF8 szClass = GetFullyQualifiedNameForClass(pThrowable->GetMethodTable()); + if (strcmp(g_PolicyExceptionClassName, szClass) != 0) + COMPlusThrow(pThrowable); + } + EX_END_CATCH(RethrowTerminalExceptions) +} +#endif // FEATURE_CAS_POLICY + +Assembly* SecurityAttributes::LoadAssemblyFromToken(IMetaDataAssemblyImport *pImport, mdAssemblyRef tkAssemblyRef) +{ + CONTRACTL + { + THROWS; + GC_TRIGGERS; + MODE_ANY; + } + CONTRACTL_END; + + _ASSERTE(TypeFromToken(tkAssemblyRef) == mdtAssemblyRef); + + // Find all the details needed to name an assembly for loading. + ASSEMBLYMETADATA sContext; + BYTE *pbPublicKeyOrToken; + DWORD cbPublicKeyOrToken; + DWORD dwFlags; + LPWSTR wszName; + DWORD cchName; + + // Initialize ASSEMBLYMETADATA structure. + ZeroMemory(&sContext, sizeof(ASSEMBLYMETADATA)); + + // Retrieve size of assembly name. + HRESULT hr = pImport->GetAssemblyRefProps(tkAssemblyRef, // [IN] The AssemblyRef for which to get the properties. + NULL, // [OUT] Pointer to the public key or token. + NULL, // [OUT] Count of bytes in the public key or token. + NULL, // [OUT] Buffer to fill with name. + NULL, // [IN] Size of buffer in wide chars. + &cchName, // [OUT] Actual # of wide chars in name. + &sContext, // [OUT] Assembly MetaData. + NULL, // [OUT] Hash blob. + NULL, // [OUT] Count of bytes in the hash blob. + NULL); // [OUT] Flags. + _ASSERTE(SUCCEEDED(hr)); + + // Allocate the necessary buffers. + wszName = (LPWSTR)_alloca(cchName * sizeof(WCHAR)); + sContext.szLocale = (LPWSTR)_alloca(sContext.cbLocale * sizeof(WCHAR)); + sContext.rProcessor = (DWORD *)_alloca(sContext.ulProcessor * sizeof(DWORD)); + sContext.rOS = (OSINFO *)_alloca(sContext.ulOS * sizeof(OSINFO)); + + // Get the assembly name and rest of naming properties. + hr = pImport->GetAssemblyRefProps(tkAssemblyRef, + (const void **)&pbPublicKeyOrToken, + &cbPublicKeyOrToken, + wszName, + cchName, + &cchName, + &sContext, + NULL, + NULL, + &dwFlags); + _ASSERTE(SUCCEEDED(hr)); + + // We've got the details of the assembly, just need to load it. + + // Convert assembly name to UTF8. + MAKE_UTF8PTR_FROMWIDE(uszAssemblyName, wszName); + + // Unfortunately we've got an ASSEMBLYMETADATA structure, but we need + // an AssemblyMetaDataInternal + AssemblyMetaDataInternal internalContext; + + // Initialize the structure. + ZeroMemory(&internalContext, sizeof(AssemblyMetaDataInternal)); + + internalContext.usMajorVersion = sContext.usMajorVersion; + internalContext.usMinorVersion = sContext.usMinorVersion; + internalContext.usBuildNumber = sContext.usBuildNumber; + internalContext.usRevisionNumber = sContext.usRevisionNumber; + internalContext.rProcessor = sContext.rProcessor; + internalContext.ulProcessor = sContext.ulProcessor; + internalContext.rOS = sContext.rOS; + internalContext.ulOS = sContext.ulOS; + if(sContext.cbLocale) + { + MAKE_UTF8PTR_FROMWIDE(pLocale, sContext.szLocale); + internalContext.szLocale = pLocale; + } + else + { + internalContext.szLocale = ""; + } + + Assembly* pAssembly = NULL; + { + // Elevate thread's allowed loading level. This can cause load failures if assemblies loaded from this point on require + // any assemblies currently being loaded. + OVERRIDE_LOAD_LEVEL_LIMIT(FILE_ACTIVE); + pAssembly = AssemblySpec::LoadAssembly(uszAssemblyName, + &internalContext, + pbPublicKeyOrToken, + cbPublicKeyOrToken, + dwFlags); + } + + // @todo: Add CORSECATTR_E_ASSEMBLY_LOAD_FAILED_EX context to this exception path? + + return pAssembly; +} + +TypeHandle FindSecurityAttributeHandle(LPCWSTR wszTypeName) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + } CONTRACTL_END; + + TypeHandle hType; + MethodDescCallSite findSecurityAttributeTypeHandle(METHOD__SECURITY_ATTRIBUTE__FIND_SECURITY_ATTRIBUTE_TYPE_HANDLE); + + struct _gc { + STRINGREF str; + } gc; + + ZeroMemory(&gc, sizeof(gc)); + + GCPROTECT_BEGIN(gc); + gc.str = StringObject::NewString(wszTypeName); + ARG_SLOT arg[1] = { + ObjToArgSlot(gc.str) + }; + + TypeHandle th = TypeHandle::FromPtr(findSecurityAttributeTypeHandle.Call_RetLPVOID(arg)); + hType = th; + GCPROTECT_END(); + + return hType; +} + +// @TODO: replace this method with a call to the reflection code that decodes CA blobs +// and instantiates managed attribute objects. Currently the most significant perf +// cost of this method is due to TypeName::GetTypeWorker which it calls via +// GetTypeFromAssemblyQualifiedName, and GetTypeUsingCASearchRules +HRESULT SecurityAttributes::AttributeSetToManaged(OBJECTREF* /*OUT*/obj, CORSEC_ATTRSET* pAttrSet, OBJECTREF* pThrowable, DWORD* pdwErrorIndex, bool bLazy) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + // Assumption: if the first obj is protected, the whole array is protected + if (pAttrSet->dwAttrCount > 0) {PRECONDITION(IsProtectedByGCFrame (obj));} + } CONTRACTL_END; + + HRESULT hr = S_OK; + DWORD i; + TypeHandle hType; + MethodTable *pMT = NULL; + MethodDesc *pMD = NULL; + + // Elevate the allowed loading level + // Elevate thread's allowed loading level. This can cause load failures if assemblies loaded from this point on require any assemblies currently being loaded. + OVERRIDE_LOAD_LEVEL_LIMIT(FILE_ACTIVE); + OVERRIDE_TYPE_LOAD_LEVEL_LIMIT(CLASS_LOADED); + + for (i = 0; i < pAttrSet->dwAttrCount; i++) + { + CORSEC_ATTRIBUTE *pAttr = &pAttrSet->pAttrs[i]; + + if (pdwErrorIndex) + *pdwErrorIndex = pAttr->dwIndex; + + // Find the assembly that contains the security attribute class. + _ASSERTE(pAttr->pName); + Assembly *pAssembly; + + if (bLazy) + { + // Convert type name to Unicode + MAKE_WIDEPTR_FROMUTF8(wszTypeName, pAttr->pName); + + { + // Load the type + { + DWORD error = (DWORD)-1; + NewHolder<TypeName> pTypeName = new TypeName(wszTypeName, &error); + + if (error == (DWORD)(-1) && !(pTypeName->GetAssembly()->IsEmpty())) + { + hType = pTypeName->GetTypeFromAsm(FALSE); + } + else + { + hType = TypeName::GetTypeFromAssembly(wszTypeName, SystemDomain::SystemAssembly()); + } + } + + // Special workaround for if the compile-time version of the attribute is no longer available + if (hType.IsNull() || hType.GetMethodTable() == NULL) + hType = FindSecurityAttributeHandle(wszTypeName); + } + } + else + { + if (!IsNilToken(pAttr->tkAssemblyRef) && TypeFromToken(pAttr->tkAssemblyRef) == mdtAssemblyRef) + { + // Load from AssemblyRef token stored in the CORSEC_ATTRSET + pAssembly = LoadAssemblyFromToken(pAttrSet->pImport, pAttr->tkAssemblyRef); + } + else + { + // Load from MSCORLIB. + pAssembly = SystemDomain::SystemAssembly(); + } + _ASSERTE(pAssembly && "Failed to find assembly with declarative attribute"); + + EX_TRY + { + hType = ClassLoader::LoadTypeByNameThrowing(pAssembly, NULL, pAttr->pName); + } + EX_CATCH_THROWABLE(pThrowable); + } + + // Load the security attribute class. + if (hType.IsNull() || (pMT = hType.GetMethodTable()) == NULL) + { + MAKE_WIDEPTR_FROMUTF8(wszTemp, pAttr->pName); + SString sMessage; + GetExceptionMessage(*pThrowable, sMessage); + if (!sMessage.IsEmpty()) + hr = VMPostError(CORSECATTR_E_TYPE_LOAD_FAILED_EX, wszTemp, sMessage.GetUnicode()); + else + hr = VMPostError(CORSECATTR_E_TYPE_LOAD_FAILED, wszTemp); + return hr; + } + + // Make sure it's not abstract. + if (pMT->IsAbstract()) + return VMPostError(CORSECATTR_E_ABSTRACT); + +#ifdef _DEBUG + // Make sure it's really a security attribute class + /*{ + MethodTable *pParentMT = pMT->GetParentMethodTable(); + CHAR *szClass; + DefineFullyQualifiedNameForClassOnStack(); + while (pParentMT) { + szClass = GetFullyQualifiedNameForClass(pParentMT->GetClass()); + if (stricmpUTF8(szClass, COR_BASE_SECURITY_ATTRIBUTE_CLASS_ANSI) == 0) + break; + pParentMT = pParentMT->GetParentMethodTable(); + } + _ASSERTE(pParentMT && "Security attribute not derived from COR_BASE_SECURITY_ATTRIBUTE_CLASS"); + }*/ +#endif + + // Instantiate an instance. + obj[i] = pMT->Allocate(); + + // Find and call the constructor. + pMD = MemberLoader::FindConstructor(pMT, &gsig_IM_SecurityAction_RetVoid); + if (pMD == NULL) + return VMPostError(CORSECATTR_E_MISSING_CONSTRUCTOR); + MethodDescCallSite ctor(pMD); + ARG_SLOT args[] = { + ObjToArgSlot(obj[i]), + (ARG_SLOT)pAttrSet->dwAction + }; + ctor.Call(args); + + // Set the attributes and properties + hr = SetAttrFieldsAndProperties(pAttr, pThrowable, pMT, &obj[i]); + if (FAILED(hr)) + return hr; + } + + return hr; +} + + +HRESULT SecurityAttributes::SetAttrFieldsAndProperties(CORSEC_ATTRIBUTE *pAttr, OBJECTREF* pThrowable, MethodTable* pMT, OBJECTREF* pObj) +{ + // Setup fields and properties on the object, as specified by the + // serialized data passed to us. + BYTE *pbBuffer = pAttr->pbValues; + SIZE_T cbBuffer = pAttr->cbValues; + BYTE *pbBufferEnd = pbBuffer + cbBuffer; + DWORD j; + HRESULT hr = S_OK; + + EX_TRY + { + for (j = 0; j < pAttr->wValues; j++) + { + DWORD dwType = 0; + BOOL bIsField = FALSE; + BYTE *pbName; + DWORD cbName; + DWORD dwLength; + NewArrayHolder<CHAR> szName(NULL); + TypeHandle hEnum; + CorElementType eEnumType = ELEMENT_TYPE_END; + + // Check we've got at least the field/property specifier and the + // type code. + if(cbBuffer < (sizeof(BYTE) + sizeof(BYTE))) + { + hr = VMPostError(CORSECATTR_E_TRUNCATED); + goto Error; + } + + // Grab the field/property specifier. + bIsField = *(BYTE*)pbBuffer == SERIALIZATION_TYPE_FIELD; + if(!bIsField && *(BYTE*)pbBuffer != SERIALIZATION_TYPE_PROPERTY) + { + hr = VMPostError(CORSECATTR_E_TRUNCATED); + goto Error; + } + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + + // Grab the value type. + dwType = *(BYTE*)pbBuffer; + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + + // If it's a type that needs further specification, get that information + switch (dwType) + { + case SERIALIZATION_TYPE_ENUM: + // Immediately after the enum type token is the fully + // qualified name of the value type used to represent + // the enum. + if (FAILED(CPackedLen::SafeGetData((BYTE const *)pbBuffer, + (BYTE const *)pbBufferEnd, + &cbName, + (BYTE const **)&pbName))) + { + hr = VMPostError(CORSECATTR_E_TRUNCATED); + goto Error; + } + + // SafeGetData ensured that the name is within the buffer + _ASSERTE(FitsIn<DWORD>((pbName - pbBuffer) + cbName)); + dwLength = static_cast<DWORD>((pbName - pbBuffer) + cbName); + pbBuffer += dwLength; + cbBuffer -= dwLength; + + // Buffer the name and nul terminate it. + szName = new (nothrow) CHAR[cbName + 1]; + if (szName == NULL) + { + hr = E_OUTOFMEMORY; + goto Error; + } + memcpy(szName, pbName, cbName); + szName[cbName] = '\0'; + + // Lookup the type (possibly loading an assembly containing + // the type). + hEnum = TypeName::GetTypeUsingCASearchRules(szName, NULL); + + //If we couldn't find the type, post an error + if (hEnum.IsNull()) + { + MAKE_WIDEPTR_FROMUTF8(wszTemp, szName); + SString sMessage; + GetExceptionMessage(*pThrowable, sMessage); + if (!sMessage.IsEmpty()) + hr = VMPostError(CORSECATTR_E_TYPE_LOAD_FAILED_EX, wszTemp, sMessage.GetUnicode()); + else + hr = VMPostError(CORSECATTR_E_TYPE_LOAD_FAILED, wszTemp); + goto Error; + } + + // Calculate the underlying primitive type of the + // enumeration. + eEnumType = hEnum.GetInternalCorElementType(); + break; + case SERIALIZATION_TYPE_SZARRAY: + case SERIALIZATION_TYPE_TYPE: + // Can't deal with these yet. + hr = VMPostError(CORSECATTR_E_UNSUPPORTED_TYPE); + goto Error; + } + + // Grab the field/property name and length. + if (FAILED(CPackedLen::SafeGetData((BYTE const *)pbBuffer, + (BYTE const *)pbBufferEnd, + &cbName, + (BYTE const **)&pbName))) + { + hr = VMPostError(CORSECATTR_E_TRUNCATED); + goto Error; + } + + // SafeGetData ensured that the name is within the buffer + _ASSERTE(FitsIn<DWORD>((pbName - pbBuffer) + cbName)); + dwLength = static_cast<DWORD>((pbName - pbBuffer) + cbName); + pbBuffer += dwLength; + cbBuffer -= dwLength; + + // Buffer the name and null terminate it. + szName = new (nothrow) CHAR[cbName + 1]; + if (szName == NULL) + { + hr = E_OUTOFMEMORY; + goto Error; + } + memcpy(szName, pbName, cbName); + szName[cbName] = '\0'; + + // Set the field or property + if (bIsField) + hr = SetAttrField(&pbBuffer, &cbBuffer, dwType, hEnum, pMT, szName, pObj, dwLength, pbName, cbName, eEnumType); + else + hr = SetAttrProperty(&pbBuffer, &cbBuffer, pMT, dwType, szName, pObj, dwLength, pbName, cbName, eEnumType); + } + } +Error:; + EX_CATCH + { + hr = GET_EXCEPTION()->GetHR(); + if (pThrowable) + { + *pThrowable = GET_THROWABLE(); + } + } + EX_END_CATCH(SwallowAllExceptions); + return hr; +} + +HRESULT SecurityAttributes::SetAttrField(BYTE** ppbBuffer, SIZE_T* pcbBuffer, DWORD dwType, TypeHandle hEnum, MethodTable* pMT, __in_z LPSTR szName, OBJECTREF* pObj, DWORD dwLength, BYTE* pbName, DWORD cbName, CorElementType eEnumType) +{ + DWORD cbSig = 0; + NewArrayHolder<BYTE> pbSig(new (nothrow) BYTE[128]); + if (pbSig == NULL) + return E_OUTOFMEMORY; + + BYTE *pbBufferEnd = *ppbBuffer + *pcbBuffer; + + // Build the field signature. + cbSig += CorSigCompressData((ULONG)IMAGE_CEE_CS_CALLCONV_FIELD, &pbSig[cbSig]); + switch (dwType) + { + case SERIALIZATION_TYPE_BOOLEAN: + case SERIALIZATION_TYPE_I1: + case SERIALIZATION_TYPE_I2: + case SERIALIZATION_TYPE_I4: + case SERIALIZATION_TYPE_I8: + case SERIALIZATION_TYPE_U1: + case SERIALIZATION_TYPE_U2: + case SERIALIZATION_TYPE_U4: + case SERIALIZATION_TYPE_U8: + case SERIALIZATION_TYPE_R4: + case SERIALIZATION_TYPE_R8: + case SERIALIZATION_TYPE_CHAR: + static_assert_no_msg(SERIALIZATION_TYPE_BOOLEAN == (CorSerializationType)ELEMENT_TYPE_BOOLEAN); + static_assert_no_msg(SERIALIZATION_TYPE_I1 == (CorSerializationType)ELEMENT_TYPE_I1); + static_assert_no_msg(SERIALIZATION_TYPE_I2 == (CorSerializationType)ELEMENT_TYPE_I2); + static_assert_no_msg(SERIALIZATION_TYPE_I4 == (CorSerializationType)ELEMENT_TYPE_I4); + static_assert_no_msg(SERIALIZATION_TYPE_I8 == (CorSerializationType)ELEMENT_TYPE_I8); + static_assert_no_msg(SERIALIZATION_TYPE_U1 == (CorSerializationType)ELEMENT_TYPE_U1); + static_assert_no_msg(SERIALIZATION_TYPE_U2 == (CorSerializationType)ELEMENT_TYPE_U2); + static_assert_no_msg(SERIALIZATION_TYPE_U4 == (CorSerializationType)ELEMENT_TYPE_U4); + static_assert_no_msg(SERIALIZATION_TYPE_U8 == (CorSerializationType)ELEMENT_TYPE_U8); + static_assert_no_msg(SERIALIZATION_TYPE_R4 == (CorSerializationType)ELEMENT_TYPE_R4); + static_assert_no_msg(SERIALIZATION_TYPE_R8 == (CorSerializationType)ELEMENT_TYPE_R8); + static_assert_no_msg(SERIALIZATION_TYPE_CHAR == (CorSerializationType)ELEMENT_TYPE_CHAR); + cbSig += CorSigCompressData(dwType, &pbSig[cbSig]); + break; + case SERIALIZATION_TYPE_STRING: + cbSig += CorSigCompressData((ULONG)ELEMENT_TYPE_STRING, &pbSig[cbSig]); + break; + case SERIALIZATION_TYPE_ENUM: + // To avoid problems when the field and enum are defined + // in different scopes (we'd have to go hunting for + // typerefs), we build a signature with a special type + // (ELEMENT_TYPE_INTERNAL, which contains a TypeHandle). + // This compares loaded types for indentity. + cbSig += CorSigCompressData((ULONG)ELEMENT_TYPE_INTERNAL, &pbSig[cbSig]); + cbSig += CorSigCompressPointer(hEnum.AsPtr(), &pbSig[cbSig]); + break; + default: + return VMPostError(CORSECATTR_E_UNSUPPORTED_TYPE); + } + + + // Locate a field desc. + FieldDesc* pFD = MemberLoader::FindField(pMT, szName, (PCCOR_SIGNATURE)pbSig, + cbSig, pMT->GetModule()); + if (pFD == NULL) + { + MAKE_WIDEPTR_FROMUTF8(wszTemp, szName); + return VMPostError(CORSECATTR_E_NO_FIELD, wszTemp); + } + + // Set the field value. + LPSTR szString; + switch (dwType) + { + case SERIALIZATION_TYPE_BOOLEAN: + case SERIALIZATION_TYPE_I1: + case SERIALIZATION_TYPE_U1: + if(*pcbBuffer < sizeof(BYTE)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue8(*pObj, *(BYTE*)(*ppbBuffer)); + (*ppbBuffer) += sizeof(BYTE); + (*pcbBuffer) -= sizeof(BYTE); + break; + case SERIALIZATION_TYPE_CHAR: + case SERIALIZATION_TYPE_I2: + case SERIALIZATION_TYPE_U2: + if(*pcbBuffer < sizeof(WORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue16(*pObj, GET_UNALIGNED_VAL16(*ppbBuffer)); + (*ppbBuffer) += sizeof(WORD); + (*pcbBuffer) -= sizeof(WORD); + break; + case SERIALIZATION_TYPE_I4: + case SERIALIZATION_TYPE_U4: + case SERIALIZATION_TYPE_R4: + if(*pcbBuffer < sizeof(DWORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue32(*pObj, GET_UNALIGNED_VAL32(*ppbBuffer)); + (*ppbBuffer) += sizeof(DWORD); + (*pcbBuffer) -= sizeof(DWORD); + break; + case SERIALIZATION_TYPE_I8: + case SERIALIZATION_TYPE_U8: + case SERIALIZATION_TYPE_R8: + if(*pcbBuffer < sizeof(INT64)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue64(*pObj, GET_UNALIGNED_VAL64(*ppbBuffer)); + (*ppbBuffer) += sizeof(INT64); + (*pcbBuffer) -= sizeof(INT64); + break; + case SERIALIZATION_TYPE_STRING: + // Ensures special case 'null' check below does not overrun buffer + if(*ppbBuffer >= pbBufferEnd) { + return VMPostError(CORSECATTR_E_TRUNCATED); + } + // Special case 'null' (represented as a length byte of '0xFF'). + if (*(*ppbBuffer) == 0xFF) { + szString = NULL; + dwLength = sizeof(BYTE); + } else { + if (FAILED(CPackedLen::SafeGetData((BYTE const *)*ppbBuffer, + (BYTE const *)pbBufferEnd, + &cbName, + (BYTE const **)&pbName))) + { + return VMPostError(CORSECATTR_E_TRUNCATED); + } + + // SafeGetData will ensure the name is within the buffer + _ASSERTE(FitsIn<DWORD>((pbName - *ppbBuffer) + cbName)); + dwLength = static_cast<DWORD>((pbName - *ppbBuffer) + cbName); + + DWORD allocLen = cbName + 1; + // Buffer and nul terminate it. + szString = (LPSTR)_alloca(allocLen); + memcpy(szString, pbName, cbName); + szString[cbName] = '\0'; + + } + + // Allocate and initialize a managed version of the string. + { + STRINGREF orString; + if (szString) + { + orString = StringObject::NewString(szString, cbName); + if (orString == NULL) + COMPlusThrowOM(); + } + else + orString = NULL; + + pFD->SetRefValue(*pObj, (OBJECTREF)orString); + } + + (*ppbBuffer) += dwLength; + (*pcbBuffer) -= dwLength; + break; + case SERIALIZATION_TYPE_ENUM: + // Get the underlying primitive type. + switch (eEnumType) + { + case ELEMENT_TYPE_I1: + case ELEMENT_TYPE_U1: + if(*pcbBuffer < sizeof(BYTE)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue8(*pObj, *(BYTE*)(*ppbBuffer)); + (*ppbBuffer) += sizeof(BYTE); + (*pcbBuffer) -= sizeof(BYTE); + break; + case ELEMENT_TYPE_I2: + case ELEMENT_TYPE_U2: + if(*pcbBuffer < sizeof(WORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue16(*pObj, GET_UNALIGNED_VAL16(*ppbBuffer)); + (*ppbBuffer) += sizeof(WORD); + (*pcbBuffer) -= sizeof(WORD); + break; + case ELEMENT_TYPE_I4: + case ELEMENT_TYPE_U4: + if(*pcbBuffer < sizeof(DWORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + pFD->SetValue32(*pObj, GET_UNALIGNED_VAL32(*ppbBuffer)); + (*ppbBuffer) += sizeof(DWORD); + (*pcbBuffer) -= sizeof(DWORD); + break; + default: + return VMPostError(CORSECATTR_E_UNSUPPORTED_ENUM_TYPE); + } + break; + default: + return VMPostError(CORSECATTR_E_UNSUPPORTED_TYPE); + } + return S_OK; +} + +HRESULT SecurityAttributes::SetAttrProperty(BYTE** ppbBuffer, SIZE_T* pcbBuffer, MethodTable* pMT, DWORD dwType, __in_z LPSTR szName, OBJECTREF* pObj, DWORD dwLength, BYTE* pbName, DWORD cbName, CorElementType eEnumType) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + PRECONDITION(IsProtectedByGCFrame (pObj)); + } CONTRACTL_END; + + // Locate the property setter. + MethodDesc* pMD = MemberLoader::FindPropertyMethod(pMT, szName, PropertySet); + if (pMD == NULL) + { + MAKE_WIDEPTR_FROMUTF8(wszTemp, szName); + return VMPostError(CORSECATTR_E_NO_PROPERTY, wszTemp); + } + + MethodDescCallSite propSet(pMD); + + // Build the argument list. + ARG_SLOT args[2] = { NULL, NULL }; + LPSTR szString; + NewHolder<BYTE> tmpLargeStringHolder (NULL); + + switch (dwType) + { + case SERIALIZATION_TYPE_BOOLEAN: + case SERIALIZATION_TYPE_I1: + case SERIALIZATION_TYPE_U1: + if(*pcbBuffer < sizeof(BYTE)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)*(BYTE*)(*ppbBuffer); + (*ppbBuffer) += sizeof(BYTE); + (*pcbBuffer) -= sizeof(BYTE); + break; + case SERIALIZATION_TYPE_CHAR: + case SERIALIZATION_TYPE_I2: + case SERIALIZATION_TYPE_U2: + if(*pcbBuffer < sizeof(WORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)GET_UNALIGNED_VAL16(*ppbBuffer); + (*ppbBuffer) += sizeof(WORD); + (*pcbBuffer) -= sizeof(WORD); + break; + case SERIALIZATION_TYPE_I4: + case SERIALIZATION_TYPE_U4: + case SERIALIZATION_TYPE_R4: + if(*pcbBuffer < sizeof(DWORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)GET_UNALIGNED_VAL32(*ppbBuffer); + (*ppbBuffer) += sizeof(DWORD); + (*pcbBuffer) -= sizeof(DWORD); + break; + case SERIALIZATION_TYPE_I8: + case SERIALIZATION_TYPE_U8: + case SERIALIZATION_TYPE_R8: + if(*pcbBuffer < sizeof(INT64)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)GET_UNALIGNED_VAL64(*ppbBuffer); + (*ppbBuffer) += sizeof(INT64); + (*pcbBuffer) -= sizeof(INT64); + break; + case SERIALIZATION_TYPE_STRING: + // Ensures special case 'null' check below does not overrun buffer + if(*pcbBuffer < sizeof(BYTE)) { + return VMPostError(CORSECATTR_E_TRUNCATED); + } + // Special case 'null' (represented as a length byte of '0xFF'). + if (*(*ppbBuffer) == 0xFF) { + szString = NULL; + dwLength = sizeof(BYTE); + if(*pcbBuffer < sizeof(BYTE)) + return VMPostError(CORSECATTR_E_TRUNCATED); + } else { + + if (FAILED(CPackedLen::SafeGetData((BYTE const *)(*ppbBuffer), + (BYTE const *)(*ppbBuffer + *pcbBuffer), + &cbName, + (BYTE const **)&pbName))) + { + return VMPostError(CORSECATTR_E_TRUNCATED); + } + + // Used below - SafeGetData ensures that name is within the buffer + _ASSERTE(FitsIn<DWORD>((pbName - *ppbBuffer) + cbName)); + dwLength = static_cast<DWORD>((pbName - *ppbBuffer) + cbName); + + DWORD allocLen = cbName + 1; + + // + // For smaller size strings allocate from stack, use heap otherwise + // + + if ((pbName - *ppbBuffer) < 4) { + // Buffer and nul terminate it. + szString = (LPSTR)_alloca(allocLen); + } else { + tmpLargeStringHolder = new BYTE[allocLen]; + szString = (LPSTR) ((BYTE*)tmpLargeStringHolder); + } + + memcpy(szString, pbName, cbName); + szString[cbName] = '\0'; + } + + // Allocate and initialize a managed version of the string. + { + STRINGREF orString; + + if (szString) { + orString = StringObject::NewString(szString, cbName); + if (orString == NULL) + COMPlusThrowOM(); + } else + orString = NULL; + + args[1] = ObjToArgSlot(orString); + } + + (*ppbBuffer) += dwLength; + (*pcbBuffer) -= dwLength; + break; + case SERIALIZATION_TYPE_ENUM: + // Get the underlying primitive type. + switch (eEnumType) + { + case ELEMENT_TYPE_I1: + case ELEMENT_TYPE_U1: + if(*pcbBuffer < sizeof(BYTE)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)*(BYTE*)(*ppbBuffer); + (*ppbBuffer) += sizeof(BYTE); + (*pcbBuffer) -= sizeof(BYTE); + break; + case ELEMENT_TYPE_I2: + case ELEMENT_TYPE_U2: + if(*pcbBuffer < sizeof(WORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)GET_UNALIGNED_VAL16(*ppbBuffer); + (*ppbBuffer) += sizeof(WORD); + (*pcbBuffer) -= sizeof(WORD); + break; + case ELEMENT_TYPE_I4: + case ELEMENT_TYPE_U4: + if(*pcbBuffer < sizeof(DWORD)) + return VMPostError(CORSECATTR_E_TRUNCATED); + args[1] = (ARG_SLOT)GET_UNALIGNED_VAL32(*ppbBuffer); + (*ppbBuffer) += sizeof(DWORD); + (*pcbBuffer) -= sizeof(DWORD); + break; + default: + return VMPostError(CORSECATTR_E_UNSUPPORTED_ENUM_TYPE); + } + break; + default: + return VMPostError(CORSECATTR_E_UNSUPPORTED_TYPE); + } + + + // ! don't move this up, StringObject::NewString + // ! inside the switch causes a GC + args[0] = ObjToArgSlot(*pObj); + + // Call the setter. + propSet.Call(args); + + return S_OK; +} + + +void SecurityAttributes::AttrSetBlobToPermissionSets( + IN BYTE* pbRawPermissions, + IN DWORD cbRawPermissions, + OUT OBJECTREF* pObj, + DWORD dwAction) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + } CONTRACTL_END; + + _ASSERTE(pbRawPermissions); + _ASSERTE(cbRawPermissions > 0); + _ASSERTE(pbRawPermissions[0] == LAZY_DECL_SEC_FLAG); + + HRESULT hr = S_OK; + CORSEC_ATTRSET pset; + + // Deserialize the CORSEC_ATTRSET + hr = BlobToAttributeSet(pbRawPermissions, cbRawPermissions, &pset, dwAction); + if(FAILED(hr)) + COMPlusThrowHR(hr); + + OBJECTREF throwable = NULL; + GCPROTECT_BEGIN(throwable); + { + // allocate and GC-protect an array of objectrefs to reference the permissions + OBJECTREF* attrArray = (OBJECTREF*)_alloca(pset.dwAttrCount * sizeof(OBJECTREF)); + memset(attrArray, 0, pset.dwAttrCount * sizeof(OBJECTREF)); + GCPROTECT_ARRAY_BEGIN(*attrArray, pset.dwAttrCount); + { + // Convert to a managed array of attribute objects + DWORD dwErrorIndex; + hr = AttributeSetToManaged(/*OUT*/attrArray, &pset, &throwable, &dwErrorIndex, true); + + // Convert the array of attribute objects to a serialized PermissionSet + if (SUCCEEDED(hr)) + { + BYTE* pbXmlBlob = NULL; + DWORD cbXmlBlob = 0; + BYTE* pbNonCasXmlBlob = NULL; + DWORD cbNonCasXmlBlob = 0; + + AttrArrayToPermissionSet(attrArray, + false, + pset.dwAttrCount, + &pbXmlBlob, + &cbXmlBlob, + &pbNonCasXmlBlob, + &cbNonCasXmlBlob, + ActionAllowsNullPermissionSet(static_cast<CorDeclSecurity>(dwAction)), + pObj); + + _ASSERTE(pbXmlBlob == NULL && cbXmlBlob == 0 && pbNonCasXmlBlob == NULL && cbNonCasXmlBlob == 0); + } + } + GCPROTECT_END(); + } + GCPROTECT_END(); + + if(FAILED(hr)) + COMPlusThrowHR(hr); +} + +#ifdef FEATURE_CAS_POLICY +HRESULT SecurityAttributes::TranslateSecurityAttributesHelper( + CORSEC_ATTRSET *pAttrSet, + BYTE **ppbOutput, + DWORD *pcbOutput, + BYTE **ppbNonCasOutput, + DWORD *pcbNonCasOutput, + DWORD *pdwErrorIndex) +{ + CONTRACTL { + NOTHROW; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + HRESULT hr = S_OK; + OBJECTREF *attrArray; + DWORD dwGlobalError = 0; + + EX_TRY + { + if (pdwErrorIndex) + dwGlobalError = *pdwErrorIndex; + + // Get into the context of the special compilation appdomain (which has an + // AppBase set to the current directory). + ComCallWrapper *pWrap = ComCallWrapper::GetWrapperFromIP(pAttrSet->pAppDomain); + + ENTER_DOMAIN_ID(pWrap->GetDomainID()) + { + struct _gc { + OBJECTREF throwable; + OBJECTREF orPermSet; + } gc; + ZeroMemory(&gc, sizeof(gc)); + GCPROTECT_BEGIN(gc); + { + // we need to setup special security settings that we use during compilation + SetupRestrictSecAttributes(); + + // allocate and protect an array of objectrefs to reference the permissions + attrArray = (OBJECTREF*)_alloca(pAttrSet->dwAttrCount * sizeof(OBJECTREF)); + memset(attrArray, 0, pAttrSet->dwAttrCount * sizeof(OBJECTREF)); + GCPROTECT_ARRAY_BEGIN(*attrArray, pAttrSet->dwAttrCount); + { + // Convert to an array of attributes, and then serialize to XML + hr = AttributeSetToManaged(/*OUT*/attrArray, pAttrSet, &gc.throwable, pdwErrorIndex, false); + if (SUCCEEDED(hr)) + { + if (pdwErrorIndex) + *pdwErrorIndex = dwGlobalError; + + // Convert the array of attribute objects to a serialized PermissionSet or PermissionSetCollection + AttrArrayToPermissionSet(attrArray, + true, + pAttrSet->dwAttrCount, + ppbOutput, + pcbOutput, + ppbNonCasOutput, + pcbNonCasOutput, + ActionAllowsNullPermissionSet(static_cast<CorDeclSecurity>(pAttrSet->dwAction)), + &gc.orPermSet); + } + } + GCPROTECT_END(); + } + GCPROTECT_END(); // for throwable + } + END_DOMAIN_TRANSITION; + } + EX_CATCH_HRESULT(hr); + return hr; +} +#endif // FEATURE_CAS_POLICY + +// Call into managed code to group permissions into a PermissionSet and serialize it to XML +void SecurityAttributes::AttrArrayToPermissionSet(OBJECTREF* attrArray, + bool fSerialize, + DWORD attrCount, + BYTE **ppbOutput, + DWORD *pcbOutput, + BYTE **ppbNonCasOutput, + DWORD *pcbNonCasOutput, + bool fAllowEmptyPermissionSet, + OBJECTREF* pPermSet) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + EApiCategories eProtectedCategories = (EApiCategories)(GetHostProtectionManager()->GetProtectedCategories()); + + MethodDescCallSite createSerialized(METHOD__PERMISSION_SET__CREATE_SERIALIZED); + + // Allocate a managed array of security attribute objects for input to the function. + PTRARRAYREF orInput = (PTRARRAYREF) AllocateObjectArray(attrCount, g_pObjectClass); + + // Copy over the permission objects references. + DWORD i; + for (i = 0; i < attrCount; i++) + { + orInput->SetAt(i, attrArray[i]); + } + + // Call the routine. + struct _gc { + U1ARRAYREF orNonCasOutput; + } gc; + ZeroMemory(&gc, sizeof(gc)); + GCPROTECT_BEGIN(gc); + + ARG_SLOT args[] = { + ObjToArgSlot(orInput), + BoolToArgSlot(fSerialize), + PtrToArgSlot(&gc.orNonCasOutput), + PtrToArgSlot(pPermSet), + (ARG_SLOT)eProtectedCategories, + BoolToArgSlot(fAllowEmptyPermissionSet) + }; + U1ARRAYREF orOutput = NULL; + + { + // Elevate the allowed loading level + // Elevate thread's allowed loading level. This can cause load failures if assemblies loaded from this point on require any assemblies currently being loaded. + OVERRIDE_LOAD_LEVEL_LIMIT(FILE_ACTIVE); + OVERRIDE_TYPE_LOAD_LEVEL_LIMIT(CLASS_LOADED); + + orOutput = (U1ARRAYREF) createSerialized.Call_RetOBJECTREF(args); + } + + // Buffer the managed output in a native binary blob. + // Special case the empty blob. We might get a second blob output if + // there were any non-CAS permissions present. + NewArrayHolder<BYTE> TempOutput(NULL); + NewArrayHolder<BYTE> TempNonCasOutput(NULL); + + if (orOutput == NULL) + { + *pcbOutput = 0; + } + else + { + BYTE *pbArray = orOutput->GetDataPtr(); + DWORD cbArray = orOutput->GetNumComponents(); + TempOutput = new BYTE[cbArray]; + memcpy(TempOutput, pbArray, cbArray); + *pcbOutput = cbArray; + } + + if (gc.orNonCasOutput == NULL) + { + *pcbNonCasOutput = 0; + } + else + { + BYTE *pbArray = gc.orNonCasOutput->GetDataPtr(); + DWORD cbArray = gc.orNonCasOutput->GetNumComponents(); + TempNonCasOutput = new BYTE[cbArray]; + memcpy(TempNonCasOutput, pbArray, cbArray); + *pcbNonCasOutput = cbArray; + } + + *ppbOutput = TempOutput; + *ppbNonCasOutput = TempNonCasOutput; + + TempOutput.SuppressRelease(); + TempNonCasOutput.SuppressRelease(); + + GCPROTECT_END(); +} + + +// +// This is a public exported method +// + +// Translate a set of security custom attributes into a serialized permission set blob. +HRESULT STDMETHODCALLTYPE TranslateSecurityAttributes(CORSEC_ATTRSET *pAttrSet, + BYTE **ppbOutput, + DWORD *pcbOutput, + BYTE **ppbNonCasOutput, + DWORD *pcbNonCasOutput, + DWORD *pdwErrorIndex) +{ +#ifdef FEATURE_CAS_POLICY + CONTRACTL { + NOTHROW; + GC_TRIGGERS; + ENTRY_POINT; + MODE_ANY; + } CONTRACTL_END; + HRESULT hr = S_OK; + + BEGIN_ENTRYPOINT_NOTHROW; + + GCX_COOP(); // because it calls into managed code to instantiate the PermissionSet objects + hr = SecurityAttributes::TranslateSecurityAttributesHelper(pAttrSet, ppbOutput, pcbOutput, + ppbNonCasOutput, pcbNonCasOutput, pdwErrorIndex); + + END_ENTRYPOINT_NOTHROW; + + return hr; +#else + return E_NOTIMPL; +#endif +} + + +// +// This is a public exported method +// + +// Reads permission requests (if any) from the manifest of an assembly. +HRESULT STDMETHODCALLTYPE GetPermissionRequests(LPCWSTR pwszFileName, + BYTE **ppbMinimal, + DWORD *pcbMinimal, + BYTE **ppbOptional, + DWORD *pcbOptional, + BYTE **ppbRefused, + DWORD *pcbRefused) +{ + CONTRACTL { + NOTHROW; + GC_TRIGGERS; + MODE_PREEMPTIVE; + ENTRY_POINT; + } CONTRACTL_END; + + HRESULT hr = S_OK; + + BEGIN_EXTERNAL_ENTRYPOINT(&hr) + { + IMetaDataDispenser *pMD = NULL; + IMetaDataAssemblyImport *pMDAsmImport = NULL; + IMetaDataImport *pMDImport = NULL; + mdAssembly mdAssembly; + BYTE *pbMinimal = NULL; + DWORD cbMinimal = 0; + BYTE *pbOptional = NULL; + DWORD cbOptional = 0; + BYTE *pbRefused = NULL; + DWORD cbRefused = 0; + HCORENUM hEnumDcl = NULL; + mdPermission rPSets[dclMaximumValue + 1]; + DWORD dwSets; + DWORD i; + + *ppbMinimal = NULL; + *pcbMinimal = 0; + *ppbOptional = NULL; + *pcbOptional = 0; + *ppbRefused = NULL; + *pcbRefused = 0; + + // Get the meta data interface dispenser. + hr = MetaDataGetDispenser(CLSID_CorMetaDataDispenser, + IID_IMetaDataDispenserEx, + (void **)&pMD); + if (FAILED(hr)) + goto Error; + + // Open a scope on the assembly file. + hr = pMD->OpenScope(pwszFileName, + 0, + IID_IMetaDataAssemblyImport, + (IUnknown**)&pMDAsmImport); + if (FAILED(hr)) + goto Error; + + // Determine the assembly token. + hr = pMDAsmImport->GetAssemblyFromScope(&mdAssembly); + if (FAILED(hr)) + goto Error; + + // QI for a normal import interface. + hr = pMDAsmImport->QueryInterface(IID_IMetaDataImport, (void**)&pMDImport); + if (FAILED(hr)) + goto Error; + + // Look for permission request sets hung off the assembly token. + hr = pMDImport->EnumPermissionSets(&hEnumDcl, + mdAssembly, + dclActionNil, + rPSets, + dclMaximumValue + 1, + &dwSets); + if (FAILED(hr)) + goto Error; + + for (i = 0; i < dwSets; i++) { + BYTE *pbData; + DWORD cbData; + DWORD dwAction; + + pMDImport->GetPermissionSetProps(rPSets[i], + &dwAction, + (void const **)&pbData, + &cbData); + + switch (dwAction) { + case dclRequestMinimum: + _ASSERTE(pbMinimal == NULL); + pbMinimal = pbData; + cbMinimal = cbData; + break; + case dclRequestOptional: + _ASSERTE(pbOptional == NULL); + pbOptional = pbData; + cbOptional = cbData; + break; + case dclRequestRefuse: + _ASSERTE(pbRefused == NULL); + pbRefused = pbData; + cbRefused = cbData; + break; + default: + _ASSERTE(FALSE); + } + } + + pMDImport->CloseEnum(hEnumDcl); + + // Buffer the results (since we're about to close the metadata scope and + // lose the original data). + if (pbMinimal) { + *ppbMinimal = new (nothrow) BYTE[cbMinimal]; + if (*ppbMinimal == NULL) { + hr = E_OUTOFMEMORY; + goto Error; + } + memcpy(*ppbMinimal, pbMinimal, cbMinimal); + *pcbMinimal = cbMinimal; + } + + if (pbOptional) { + *ppbOptional = new (nothrow) BYTE[cbOptional]; + if (*ppbOptional == NULL) { + hr = E_OUTOFMEMORY; + goto Error; + } + memcpy(*ppbOptional, pbOptional, cbOptional); + *pcbOptional = cbOptional; + } + + if (pbRefused) { + *ppbRefused = new (nothrow) BYTE[cbRefused]; + if (*ppbRefused == NULL) { + hr = E_OUTOFMEMORY; + goto Error; + } + memcpy(*ppbRefused, pbRefused, cbRefused); + *pcbRefused = cbRefused; + } + + Error: + if (pMDImport) + pMDImport->Release(); + if (pMDAsmImport) + pMDAsmImport->Release(); + if (pMD) + pMD->Release(); + } + END_EXTERNAL_ENTRYPOINT; + + return hr; +} + +// Load permission requests in their serialized form from assembly metadata. +// This consists of a required permissions set and optionally an optional and +// deny permission set. +void SecurityAttributes::LoadPermissionRequestsFromAssembly(IN IMDInternalImport* pImport, + OUT OBJECTREF* pReqdPermissions, + OUT OBJECTREF* pOptPermissions, + OUT OBJECTREF* pDenyPermissions) +{ + CONTRACTL + { + THROWS; + GC_TRIGGERS; + MODE_ANY; + PRECONDITION(CheckPointer(pReqdPermissions)); + PRECONDITION(CheckPointer(pOptPermissions)); + PRECONDITION(CheckPointer(pDenyPermissions)); + } CONTRACTL_END; + + mdAssembly mdAssembly; + HRESULT hr; + + *pReqdPermissions = NULL; + *pOptPermissions = NULL; + *pDenyPermissions = NULL; + + // It's OK to be called with a NULL assembly. This can happen in the code + // path where we're just checking for a signature, nothing else. So just + // return without doing anything. + if (pImport == NULL) + return; + + // Locate assembly metadata token since the various permission sets are + // written as custom values against this token. + if (pImport->GetAssemblyFromScope(&mdAssembly) != S_OK) { + _ASSERT(FALSE); + return; + } + + struct _gc + { + OBJECTREF reqdPset; + OBJECTREF optPset; + OBJECTREF denyPset; + } gc; + ZeroMemory(&gc, sizeof(gc)); + + { + GCX_COOP(); // because GetDeclaredPermissions may call into managed code + GCPROTECT_BEGIN(gc); + + // Read and translate required permission set. + hr = Security::GetDeclaredPermissions(pImport, mdAssembly, dclRequestMinimum, &gc.reqdPset, NULL); + _ASSERT(SUCCEEDED(hr) || (hr == CLDB_E_RECORD_NOTFOUND)); + + // Now the optional permission set. + PsetCacheEntry *pOptPSCacheEntry = NULL; + hr = Security::GetDeclaredPermissions(pImport, mdAssembly, dclRequestOptional, &gc.optPset, &pOptPSCacheEntry); + _ASSERT(SUCCEEDED(hr) || (hr == CLDB_E_RECORD_NOTFOUND)); + + // An empty permission set has semantic meaning if it is an assembly's optional permission set. + // If we have an optional set, then we need to make sure it is created. + if (SUCCEEDED(hr) && gc.optPset == NULL && pOptPSCacheEntry != NULL) + { + gc.optPset = pOptPSCacheEntry->CreateManagedPsetObject(dclRequestOptional, /* createEmptySet */ true); + } + + // And finally the refused permission set. + hr = Security::GetDeclaredPermissions(pImport, mdAssembly, dclRequestRefuse, &gc.denyPset, NULL); + _ASSERT(SUCCEEDED(hr) || (hr == CLDB_E_RECORD_NOTFOUND)); + + *pReqdPermissions = gc.reqdPset; + *pOptPermissions = gc.optPset; + *pDenyPermissions = gc.denyPset; + + GCPROTECT_END(); + } +} + +// Determine whether a RequestOptional or RequestRefused are made in the assembly manifest. +BOOL SecurityAttributes::RestrictiveRequestsInAssembly(IMDInternalImport* pImport) +{ + CONTRACTL { + NOTHROW; + GC_NOTRIGGER; + MODE_ANY; + } CONTRACTL_END; + + mdAssembly mdAssembly; + HRESULT hr; + HENUMInternal hEnumDcl; + + // Locate assembly metadata token since the various permission sets are + // written as custom values against this token. + hr = pImport->GetAssemblyFromScope(&mdAssembly); + if (FAILED(hr)) + return TRUE; + + hr = pImport->EnumPermissionSetsInit(mdAssembly, + dclRequestRefuse, + &hEnumDcl); + + BOOL bFoundRequestRefuse = (hr != CLDB_E_RECORD_NOTFOUND); + pImport->EnumClose(&hEnumDcl); + + if (bFoundRequestRefuse) + return TRUE; + + hr = pImport->EnumPermissionSetsInit(mdAssembly, + dclRequestOptional, + &hEnumDcl); + BOOL bFoundRequestOptional = (hr != CLDB_E_RECORD_NOTFOUND); + pImport->EnumClose(&hEnumDcl); + + return bFoundRequestOptional; +} +#endif // CROSSGEN_COMPILE + +HRESULT SecurityAttributes::GetPermissionsFromMetaData(IN IMDInternalImport *pInternalImport, + IN mdToken token, + IN CorDeclSecurity action, + OUT PBYTE* ppbPerm, + OUT ULONG* pcbPerm) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + HRESULT hr = S_OK; + mdPermission tkPerm; + void const ** ppData = const_cast<void const**> (reinterpret_cast<void**> (ppbPerm)); + DWORD dwActionDummy; + // Get the blob for the CAS action from the security action table in metadata + HENUMInternalHolder hEnumDcl(pInternalImport); + if (hEnumDcl.EnumPermissionSetsInit(token,action)) + { + _ASSERTE(pInternalImport->EnumGetCount(&hEnumDcl) == 1 && "Multiple permissions sets for the same declaration aren't currently supported."); + if (pInternalImport->EnumNext(&hEnumDcl, &tkPerm)) + { + hr = pInternalImport->GetPermissionSetProps( + tkPerm, + &dwActionDummy, + ppData, + pcbPerm); + + if (FAILED(hr) ) + { + COMPlusThrowHR(hr); + } + } + else + { + _ASSERTE(!"At least one enumeration expected"); + } + } + else + { + hr = CLDB_E_RECORD_NOTFOUND; + } + return hr; +} + +void SecurityAttributes::CreateAndCachePermissions( + IN PBYTE pbPerm, + IN ULONG cbPerm, + IN CorDeclSecurity action, + OUT OBJECTREF *pDeclaredPermissions, + OUT PsetCacheEntry **pPSCacheEntry) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + SecurityDeclarativeCache *pSDC; + PsetCacheEntry* pPCE; + + pSDC = &(GetAppDomain()->m_pSecContext->m_pSecurityDeclarativeCache); + + + pPCE = pSDC->CreateAndCachePset (pbPerm, cbPerm); + if (pDeclaredPermissions) { +#ifdef CROSSGEN_COMPILE + _ASSERTE(!"This codepath should be unreachable during crossgen"); + *pDeclaredPermissions = NULL; +#else + *pDeclaredPermissions = pPCE->CreateManagedPsetObject (action); +#endif + } + if (pPSCacheEntry) { + *pPSCacheEntry = pPCE; + } +} + +// Returns the declared PermissionSet for the specified action type. +HRESULT SecurityAttributes::GetDeclaredPermissions(IN IMDInternalImport *pInternalImport, + IN mdToken token, + IN CorDeclSecurity action, + OUT OBJECTREF *pDeclaredPermissions, + OUT PsetCacheEntry **pPSCacheEntry) +{ + CONTRACTL { + THROWS; + GC_TRIGGERS; + MODE_COOPERATIVE; + } CONTRACTL_END; + + HRESULT hr = S_FALSE; + PBYTE pbPerm = NULL; + ULONG cbPerm = 0; + + + + _ASSERTE(action > dclActionNil && action <= dclMaximumValue); + + // Initialize the output parameters. + if (pDeclaredPermissions) + *pDeclaredPermissions = NULL; + if(pPSCacheEntry) + *pPSCacheEntry = NULL; + + bool bCas = !(action == dclNonCasDemand || action == dclNonCasLinkDemand || action == dclNonCasInheritance); + + hr = GetPermissionsFromMetaData(pInternalImport, token, action, &pbPerm, &cbPerm); + if(pbPerm && cbPerm > 0) + { + CreateAndCachePermissions(pbPerm, cbPerm, action, pDeclaredPermissions, pPSCacheEntry); + } + else if(!bCas) + { + // We're looking for a non-CAS action which may be encoded with the corresponding CAS action + // Pre-Whidbey, we used to encode CAS and non-CAS actions separately because we used to do + // declarative security processing at build time (we used to create a + // permset object corresponding to a declarative action, convert it into XML and then store the serialized + // XML in the assembly). + // + // In Whidbey the default is what we call LAZY declarative security (LAZY_DECL_SEC_FLAG below) - to not do any + // declarative security processing at build time (we just take the declarative annotiation and store it as a + // serialzied blob - no permsets created/converted to XML). And at runtime, we do the actual processing (create permsets etc.) + // + // What does this mean? It means that in Whidbey (and beyond), we cannot tell at build time if it is a declarative CAS action + // or non-CAS action. So at runtime, we need to check the permset stored under the cas action for a non-CAS action. + // Of course, we need to do this only if LAZY_DECL_SEC_FLAG is in effect. + + // Determine the corresponding CAS action + CorDeclSecurity casAction = dclDemand; + if(action == dclNonCasLinkDemand) + casAction = dclLinktimeCheck; + else if(action == dclNonCasInheritance) + casAction = dclInheritanceCheck; + + // Get the blob for the CAS action from the security action table in metadata + hr = GetPermissionsFromMetaData(pInternalImport, token, casAction, &pbPerm, &cbPerm); + + if(pbPerm && cbPerm > 0 && pbPerm[0] == LAZY_DECL_SEC_FLAG) // if it's a serialized CORSEC_ATTRSET + { + CreateAndCachePermissions(pbPerm, cbPerm, casAction, pDeclaredPermissions, pPSCacheEntry); + } + + } + + return hr; +} + +bool SecurityAttributes::IsHostProtectionAttribute(CORSEC_ATTRIBUTE* pAttr) +{ + static const char s_HostProtectionAttributeName[] = "System.Security.Permissions.HostProtectionAttribute, mscorlib"; + + return (strncmp(pAttr->pName, s_HostProtectionAttributeName, sizeof(s_HostProtectionAttributeName)-1) == 0); +} + +bool SecurityAttributes::IsBuiltInCASPermissionAttribute(CORSEC_ATTRIBUTE* pAttr) +{ + WRAPPER_NO_CONTRACT; + static const char s_permissionsNamespace[] = "System.Security.Permissions."; + if(strncmp(pAttr->pName, s_permissionsNamespace, sizeof(s_permissionsNamespace) - 1) != 0) + return false; // not built-in permission + static const char s_principalPermissionName[] = "System.Security.Permissions.PrincipalPermissionAttribute, mscorlib"; + + // ASSERT: at this point we know we are in builtin namespace...so compare with PrincipalPermissionAttribute + if (strncmp(pAttr->pName, s_principalPermissionName, sizeof(s_principalPermissionName)-1) == 0) + return false; // found a principal permission => Not a built-in CAS permission + + // special-case the unrestricted permission set attribute. + static const char s_PermissionSetName[] = "System.Security.Permissions.PermissionSetAttribute, mscorlib"; + if (strncmp(pAttr->pName, s_PermissionSetName, sizeof(s_PermissionSetName)-1) == 0) + return IsUnrestrictedPermissionSetAttribute(pAttr); + + return true; //built-in perm, but not principal perm => IsBuiltInCASPermissionAttribute +} + +bool SecurityAttributes::IsUnrestrictedPermissionSetAttribute(CORSEC_ATTRIBUTE* pPerm) +{ + CONTRACTL + { + NOTHROW; + GC_NOTRIGGER; + MODE_ANY; + } + CONTRACTL_END; + + BYTE const * pbBuffer = pPerm->pbValues; + SIZE_T cbBuffer = pPerm->cbValues; + BYTE const * pbBufferEnd = pbBuffer + cbBuffer; + + if (cbBuffer < 2 * sizeof(BYTE)) + return false; + + // Get the field/property specifier + if (*(BYTE*)pbBuffer == SERIALIZATION_TYPE_FIELD) + return false; + + _ASSERTE(*(BYTE*)pbBuffer == SERIALIZATION_TYPE_PROPERTY); + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + + // Get the value type + DWORD dwType = *(BYTE*)pbBuffer; + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + if (dwType != SERIALIZATION_TYPE_BOOLEAN) + return false; + + // Grab the field/property name and length. + DWORD cbName; + BYTE const * pbName; + if (FAILED(CPackedLen::SafeGetData(pbBuffer, + pbBufferEnd, + &cbName, + &pbName))) + { + return false; + } + + PREFIX_ASSUME(pbName != NULL); + + // SafeGetData will ensure the name is within the buffer + SIZE_T cbNameOffset = pbName - pbBuffer; + _ASSERTE(FitsIn<DWORD>(cbNameOffset)); + DWORD dwLength = static_cast<DWORD>(cbNameOffset + cbName); + pbBuffer += dwLength; + cbBuffer -= dwLength; + + // Buffer the name of the property and null terminate it. + DWORD allocLen = cbName + 1; + if (allocLen < cbName) + return false; + + LPSTR szName = (LPSTR)_alloca(allocLen); + memcpy(szName, pbName, cbName); + szName[cbName] = '\0'; + + if (strcmp(szName, "Unrestricted") != 0) + return false; + + // Make sure the value isn't "false" + return (*pbBuffer != 0); +} + +// This takes a PermissionSetAttribute blob and looks to see if it uses the "FILE" property. If it +// does, then it loads the file now and modifies the attribute to use the XML property instead +// (because the file may not be available at runtime.) +HRESULT SecurityAttributes::FixUpPermissionSetAttribute(CORSEC_ATTRIBUTE* pPerm) +{ + CONTRACTL + { + THROWS; + GC_NOTRIGGER; + MODE_ANY; + } + CONTRACTL_END; + + _ASSERTE(pPerm->wValues == 1 && strcmp(pPerm->pName, "System.Security.Permissions.PermissionSetAttribute") == 0); + BYTE const * pbBuffer = pPerm->pbValues; + SIZE_T cbBuffer = pPerm->cbValues; + BYTE const * pbBufferEnd = pbBuffer + cbBuffer; + HRESULT hr; + + // Check we've got at least the field/property specifier and the + // type code. + _ASSERTE(cbBuffer >= (sizeof(BYTE) + sizeof(BYTE))); + + // Grab the field/property specifier. + bool bIsField = *(BYTE*)pbBuffer == SERIALIZATION_TYPE_FIELD; + _ASSERTE(bIsField || (*(BYTE*)pbBuffer == SERIALIZATION_TYPE_PROPERTY)); + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + + // Grab the value type. + DWORD dwType = *(BYTE*)pbBuffer; + pbBuffer += sizeof(BYTE); + cbBuffer -= sizeof(BYTE); + + if(bIsField) + return S_OK; + if(dwType != SERIALIZATION_TYPE_STRING) + return S_OK; + + // Grab the field/property name and length. + ULONG cbName; + BYTE const * pbName; + IfFailRet(CPackedLen::SafeGetData(pbBuffer, pbBufferEnd, &cbName, &pbName)); + PREFIX_ASSUME(pbName != NULL); + + // SafeGetData ensures name is within buffer + SIZE_T cbNameOffset = pbName - pbBuffer; + _ASSERTE(FitsIn<DWORD>(cbNameOffset)); + DWORD dwLength = static_cast<DWORD>(cbNameOffset + cbName); + pbBuffer += dwLength; + cbBuffer -= dwLength; + + // Buffer the name of the property and null terminate it. + DWORD allocLen = cbName + 1; + LPSTR szName = (LPSTR)_alloca(allocLen); + memcpy(szName, pbName, cbName); + szName[cbName] = '\0'; + + if(strcmp(szName, "File") != 0) + return S_OK; + if(*pbBuffer == 0xFF) // special case that represents NULL string + return S_OK; + + IfFailRet(CPackedLen::SafeGetData(pbBuffer, pbBufferEnd, &cbName, &pbName)); + PREFIX_ASSUME(pbName != NULL); + + // SafeGetData ensures name is within buffer + cbNameOffset = pbName - pbBuffer; + _ASSERTE(FitsIn<DWORD>(cbNameOffset)); + dwLength = static_cast<DWORD>(cbNameOffset + cbName); + _ASSERTE(cbBuffer >= dwLength); + + // Open the file + MAKE_WIDEPTR_FROMUTF8N(wszFileName, (LPCSTR)pbName, cbName); + HandleHolder hFile(WszCreateFile (wszFileName, + GENERIC_READ, + FILE_SHARE_READ, + NULL, + OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, + NULL)); + if (hFile == INVALID_HANDLE_VALUE) + return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND); + DWORD dwFileLen = SafeGetFileSize(hFile, 0); + if (dwFileLen == 0xFFFFFFFF) + return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND); + + // Read the file + BYTE* pFileBuffer = new (nothrow) BYTE[(dwFileLen + 4) * sizeof(BYTE)]; + if(!pFileBuffer) + return E_OUTOFMEMORY; + DWORD dwBytesRead; + if ((SetFilePointer(hFile, 0, NULL, FILE_BEGIN) == 0xFFFFFFFF) || + (!ReadFile(hFile, pFileBuffer, dwFileLen, &dwBytesRead, NULL))) + { + delete [] pFileBuffer; + return E_FAIL; + } + if(dwBytesRead < dwFileLen) + { + delete [] pFileBuffer; + return E_FAIL; + } + + // Make the new attribute blob + BYTE* pNewAttrBuffer = new (nothrow) BYTE[(dwFileLen + 10) * 2 * sizeof(BYTE)]; + if(!pNewAttrBuffer) + return E_OUTOFMEMORY; + BYTE* pCurBuf = pNewAttrBuffer; + *pCurBuf = (BYTE)SERIALIZATION_TYPE_PROPERTY; + pCurBuf++; + *pCurBuf = (BYTE)SERIALIZATION_TYPE_STRING; + pCurBuf++; + pCurBuf = (BYTE*)CPackedLen::PutLength(pCurBuf, 3); + memcpy(pCurBuf, "Hex", 3); + pCurBuf += 3; + pCurBuf = (BYTE*)CPackedLen::PutLength(pCurBuf, dwFileLen * 2); + DWORD n; + BYTE b; + for(n = 0; n < dwFileLen; n++) + { + b = (pFileBuffer[n] >> 4) & 0xf; + *pCurBuf = (b < 10 ? '0' + b : 'a' + b - 10); + pCurBuf++; + b = pFileBuffer[n] & 0xf; + *pCurBuf = (b < 10 ? '0' + b : 'a' + b - 10); + pCurBuf++; + } + delete [] pFileBuffer; + + // We shouldn't have a serialized permission set that can be this large, but to be safe we'll ensure + // that we fit in the output DWORD size. + SIZE_T cbNewAttrSize = pCurBuf - pNewAttrBuffer; + + // Set the new values + delete(pPerm->pbValues); + pPerm->pbValues = pNewAttrBuffer; + pPerm->cbValues = cbNewAttrSize; + return S_OK; +} + +// if tkAssemblyRef is NULL, this assumes the type is in this assembly +// uszClassName should be a UTF8 string including both namespace and class +HRESULT GetFullyQualifiedTypeName(SString* pString, mdAssemblyRef tkAssemblyRef, __in_z CHAR* uszClassName, IMetaDataAssemblyImport *pImport, mdToken tkCtor) +{ + CONTRACTL + { + THROWS; + GC_NOTRIGGER; + MODE_ANY; + } + CONTRACTL_END; + // Add class name + MAKE_WIDEPTR_FROMUTF8(wszClassName, uszClassName); + (*pString) += (LPCWSTR) wszClassName; + if(IsNilToken(tkAssemblyRef)) + tkAssemblyRef = TokenFromRid(1, mdtAssembly); + + // Add a comma separator + (*pString) += W(", "); + + DWORD dwDisplayFlags = ASM_DISPLAYF_VERSION | ASM_DISPLAYF_PUBLIC_KEY_TOKEN | ASM_DISPLAYF_CULTURE; +#ifdef FEATURE_FUSION // why is Security accessing Fusion interfaces bypassing Loader? + // Retrieve size of assembly name + ASSEMBLYMETADATA sContext; + ZeroMemory(&sContext, sizeof(ASSEMBLYMETADATA)); + HRESULT hr = S_OK; + LPWSTR wszAssemblyName = NULL; + BYTE *pbPublicKeyOrToken = NULL; + DWORD cbPublicKeyOrToken = 0; + DWORD dwFlags = 0; + if(TypeFromToken(tkAssemblyRef) == mdtAssembly) + { + DWORD cchName; + hr = pImport->GetAssemblyProps(tkAssemblyRef, // [IN] The Assembly for which to get the properties. + NULL, // [OUT] Pointer to the public key or token. + NULL, // [OUT] Count of bytes in the public key or token. + NULL, // [OUT] Hash Algorithm + NULL, // [OUT] Buffer to fill with name. + NULL, // [IN] Size of buffer in wide chars. + &cchName, // [OUT] Actual # of wide chars in name. + &sContext, // [OUT] Assembly MetaData. + NULL); // [OUT] Flags. + if(FAILED(hr)) + return hr; + + // Get the assembly name other naming properties + wszAssemblyName = (LPWSTR)_alloca(cchName * sizeof(WCHAR)); + hr = pImport->GetAssemblyProps(tkAssemblyRef, + (const void **)&pbPublicKeyOrToken, + &cbPublicKeyOrToken, + NULL, + wszAssemblyName, + cchName, + &cchName, + &sContext, + &dwFlags); + if(FAILED(hr)) + return hr; + } + else if(TypeFromToken(tkAssemblyRef) == mdtAssemblyRef) + { + DWORD cchName; + hr = pImport->GetAssemblyRefProps(tkAssemblyRef, // [IN] The AssemblyRef for which to get the properties. + NULL, // [OUT] Pointer to the public key or token. + NULL, // [OUT] Count of bytes in the public key or token. + NULL, // [OUT] Buffer to fill with name. + NULL, // [IN] Size of buffer in wide chars. + &cchName, // [OUT] Actual # of wide chars in name. + &sContext, // [OUT] Assembly MetaData. + NULL, // [OUT] Hash blob. + NULL, // [OUT] Count of bytes in the hash blob. + NULL); // [OUT] Flags. + if(FAILED(hr)) + return hr; + + // Get the assembly name other naming properties + wszAssemblyName = (LPWSTR)_alloca(cchName * sizeof(WCHAR)); + hr = pImport->GetAssemblyRefProps(tkAssemblyRef, + (const void **)&pbPublicKeyOrToken, + &cbPublicKeyOrToken, + wszAssemblyName, + cchName, + &cchName, + &sContext, + NULL, + NULL, + &dwFlags); + if(FAILED(hr)) + return hr; + } + else + { + _ASSERTE(false && "unexpected token"); + } + + // Convert to an AssemblyNameObject + ReleaseHolder<IAssemblyName> pAssemblyNameObj; + hr = CreateAssemblyNameObject(&pAssemblyNameObj, wszAssemblyName, CANOF_PARSE_DISPLAY_NAME, NULL); + if(FAILED(hr)) + return hr; + _ASSERTE(pAssemblyNameObj && "assembly name object shouldn't be NULL"); + pAssemblyNameObj->SetProperty(ASM_NAME_MAJOR_VERSION, &sContext.usMajorVersion, sizeof(WORD)); + pAssemblyNameObj->SetProperty(ASM_NAME_MINOR_VERSION, &sContext.usMinorVersion, sizeof(WORD)); + pAssemblyNameObj->SetProperty(ASM_NAME_BUILD_NUMBER, &sContext.usBuildNumber, sizeof(WORD)); + pAssemblyNameObj->SetProperty(ASM_NAME_REVISION_NUMBER, &sContext.usRevisionNumber, sizeof(WORD)); + pAssemblyNameObj->SetProperty(ASM_NAME_CULTURE, W(""), sizeof(WCHAR)); + if(pbPublicKeyOrToken && cbPublicKeyOrToken > 0) + { + if(dwFlags & afPublicKey) + pAssemblyNameObj->SetProperty(ASM_NAME_PUBLIC_KEY, pbPublicKeyOrToken, cbPublicKeyOrToken); + else + pAssemblyNameObj->SetProperty(ASM_NAME_PUBLIC_KEY_TOKEN, pbPublicKeyOrToken, cbPublicKeyOrToken); + } + + // Convert assembly name to an ole string + StackSString name; + FusionBind::GetAssemblyNameDisplayName(pAssemblyNameObj, name, dwDisplayFlags); +#else // FEATURE_FUSION + HRESULT hr; + AssemblySpec spec; + StackSString name; + + IfFailRet(spec.Init((mdToken)tkAssemblyRef,pImport)); + spec.GetFileOrDisplayName(dwDisplayFlags,name); +#endif // FEATURE_FUSION + _ASSERTE(!name.IsEmpty() && "the assembly name should not be empty here"); + + (*pString) += name; + return S_OK; +} + +HRESULT SecurityAttributes::SerializeAttribute(CORSEC_ATTRIBUTE* pAttr, BYTE* pBuffer, SIZE_T* pCount, IMetaDataAssemblyImport *pImport) +{ + // pBuffer can be NULL if the caller is only trying to determine the size of the serialized blob. In that case, let's make a little temp buffer to facilitate CPackedLen::PutLength + SIZE_T cbPos = *pCount; + BYTE* pTempBuf = pBuffer; + SIZE_T const* pTempPos = &cbPos; + BYTE tempBuf[8]; + const SIZE_T zero = 0; + if(!pTempBuf) + { + pTempBuf = tempBuf; + pTempPos = &zero; + } + BYTE* pOldPos; + + // Get the fully qualified type name + SString sType; + HRESULT hr = GetFullyQualifiedTypeName(&sType, pAttr->tkAssemblyRef, pAttr->pName, pImport, pAttr->tkCtor); + if(FAILED(hr)) + return hr; + + // Convert assembly name to UTF8. + const WCHAR* wszTypeName = sType.GetUnicode(); + MAKE_UTF8PTR_FROMWIDE(uszTypeName, wszTypeName); + DWORD dwUTF8TypeNameLen = (DWORD)strlen(uszTypeName); + + // Serialize the type name length + pOldPos = &pTempBuf[*pTempPos]; + cbPos += (BYTE*)CPackedLen::PutLength(&pTempBuf[*pTempPos], dwUTF8TypeNameLen) - pOldPos; + + // Serialize the type name + if(pBuffer) + memcpy(&pBuffer[cbPos], uszTypeName, dwUTF8TypeNameLen); + cbPos += dwUTF8TypeNameLen; + + // Serialize the size of the properties blob + BYTE temp[32]; + SIZE_T cbSizeOfCompressedPropertiesCount = (BYTE*)CPackedLen::PutLength(temp, pAttr->wValues) - temp; + pOldPos = &pTempBuf[*pTempPos]; + + _ASSERTE(FitsIn<ULONG>(pAttr->cbValues + cbSizeOfCompressedPropertiesCount)); + ULONG propertiesLength = static_cast<ULONG>(pAttr->cbValues + cbSizeOfCompressedPropertiesCount); + cbPos += (BYTE*)CPackedLen::PutLength(&pTempBuf[*pTempPos], propertiesLength) - pOldPos; + + // Serialize the count of properties + pOldPos = &pTempBuf[*pTempPos]; + cbPos += (BYTE*)CPackedLen::PutLength(&pTempBuf[*pTempPos], pAttr->wValues) - pOldPos; + + // Serialize the properties blob + if(pBuffer) + memcpy(&pBuffer[cbPos], pAttr->pbValues, pAttr->cbValues); + cbPos += pAttr->cbValues; + + *pCount = cbPos; + return hr; +} + +HRESULT SecurityAttributes::DeserializeAttribute(CORSEC_ATTRIBUTE *pAttr, BYTE* pBuffer, ULONG cbBuffer, SIZE_T* pPos) +{ + CONTRACTL + { + NOTHROW; + GC_NOTRIGGER; + MODE_ANY; + } + CONTRACTL_END; + HRESULT hr; + + // Deserialize the size of the type name + BYTE* pClassName; + ULONG dwClassNameSize; + BYTE* pBufferEnd = pBuffer + cbBuffer; + IfFailRet(CPackedLen::SafeGetData((BYTE const *)&pBuffer[*pPos], + (BYTE const *)pBufferEnd, + &dwClassNameSize, + (BYTE const **)&pClassName)); + (*pPos) += pClassName - &pBuffer[*pPos]; + + // Deserialize the type name + (*pPos) += dwClassNameSize; + pAttr->pName = new (nothrow) CHAR[dwClassNameSize + 1]; + if(!pAttr->pName) + return E_OUTOFMEMORY; + memcpy(pAttr->pName, pClassName, dwClassNameSize); + pAttr->pName[dwClassNameSize] = '\0'; + + // Deserialize the CA blob size + BYTE* pCABlob; + ULONG cbCABlob; + IfFailRet(CPackedLen::SafeGetData((BYTE const *)&pBuffer[*pPos], + (BYTE const *)pBufferEnd, + &cbCABlob, + (BYTE const **)&pCABlob)); + + (*pPos) += pCABlob - &pBuffer[*pPos]; + + // Deserialize the CA blob value count + BYTE* pCABlobValues; + ULONG cCABlobValues; + IfFailRet(CPackedLen::SafeGetLength((BYTE const *)&pBuffer[*pPos], + (BYTE const *)pBufferEnd, + &cCABlobValues, + (BYTE const **)&pCABlobValues)); + + (*pPos) += pCABlobValues - &pBuffer[*pPos]; + if (!FitsIn<WORD>(cCABlobValues)) + return COR_E_OVERFLOW; + pAttr->wValues = static_cast<WORD>(cCABlobValues); + + // We know that pCABlobValues - pCABlob will be a positive result. + if (cbCABlob < (ULONG)(pCABlobValues - pCABlob)) + return COR_E_OVERFLOW; + + pAttr->cbValues = cbCABlob - (pCABlobValues - pCABlob); + + // Deserialize the CA blob + pAttr->pbValues = new (nothrow) BYTE[pAttr->cbValues]; + if(!pAttr->pbValues) + return E_OUTOFMEMORY; + memcpy(pAttr->pbValues, pCABlobValues, pAttr->cbValues); + + (*pPos) += pAttr->cbValues; + + return S_OK; +} + +HRESULT AttributeSetToBlob(CORSEC_ATTRSET* pAttrSet, BYTE* pBuffer, SIZE_T* pCount, IMetaDataAssemblyImport *pImport, DWORD dwAction) +{ + STANDARD_VM_CONTRACT; + + // pBuffer can be NULL if the caller is only trying to determine the size of the serialized blob. In that case, let's make a little temp buffer to facilitate CPackedLen::PutLength + SIZE_T cbPos = 0; + BYTE* pTempBuf = pBuffer; + SIZE_T const *pTempPos = &cbPos; + BYTE tempBuf[8]; + const SIZE_T zero = 0; + if(!pTempBuf) + { + pTempBuf = tempBuf; + pTempPos = &zero; + } + BYTE* pOldPos; + HRESULT hr = S_OK; + + // Serialize a LAZY_DECL_SEC_FLAG to identify the blob format (as opposed to '<' which would indicate the older XML format) + if(pBuffer) + pBuffer[cbPos] = LAZY_DECL_SEC_FLAG; + cbPos++; + + // Serialize the attribute count + pOldPos = &pTempBuf[*pTempPos]; + cbPos += (BYTE*)CPackedLen::PutLength(&pTempBuf[*pTempPos], pAttrSet->dwAttrCount) - pOldPos; + + // Serialize the attributes + DWORD i; + for(i = 0; i < pAttrSet->dwAttrCount; i++) + { + // Get the attribute + CORSEC_ATTRIBUTE *pAttr = &pAttrSet->pAttrs[i]; + + // Perform any necessary fix-ups on it + if(pAttr->wValues == 1 && strcmp(pAttr->pName, "System.Security.Permissions.PermissionSetAttribute") == 0) + IfFailGo(SecurityAttributes::FixUpPermissionSetAttribute(pAttr)); + else if((dwAction == dclLinktimeCheck || + dwAction == dclInheritanceCheck) && + strcmp(pAttr->pName, "System.Security.Permissions.PrincipalPermissionAttribute") == 0) + { + VMPostError(CORSECATTR_E_BAD_NONCAS); + return CORSECATTR_E_BAD_NONCAS; + } + + // Serialize it + SIZE_T dwAttrSize = 0; + IfFailGo(SecurityAttributes::SerializeAttribute(pAttr, pBuffer ? pBuffer + cbPos : NULL, &dwAttrSize, pImport)); + cbPos += dwAttrSize; + } + if(pCount != NULL) + *pCount = cbPos; + +ErrExit: + if (FAILED(hr)) + VMPostError(CORSECATTR_E_FAILED_TO_CREATE_PERM); // Allows for the correct message to be printed by the compiler + + return hr; +} + +HRESULT BlobToAttributeSet(BYTE* pBuffer, ULONG cbBuffer, CORSEC_ATTRSET* pAttrSet, DWORD dwAction) +{ + CONTRACTL + { + NOTHROW; + GC_NOTRIGGER; + MODE_ANY; + } + CONTRACTL_END; + HRESULT hr = S_OK; + SIZE_T cbPos = 0; + BYTE* pBufferEnd = pBuffer + cbBuffer; + memset(pAttrSet, '\0', sizeof(CORSEC_ATTRSET)); + if (dwAction >= dclDemand && dwAction <= dclRequestRefuse) + pAttrSet->dwAction = dwAction; // Already lies in the publicly visible range ( values that managed enum SecurityAction can take) + else + { + // Map the action to a publicly visible value + if (dwAction == dclNonCasDemand) + pAttrSet->dwAction = dclDemand; + else if (dwAction == dclNonCasInheritance) + pAttrSet->dwAction = dclInheritanceCheck; + else if (dwAction == dclNonCasLinkDemand) + pAttrSet->dwAction = dclLinktimeCheck; + else + { + // We have an unexpected security action here. It would be nice to fail, but for compatibility we need to simply + // reset the action to Nil. + pAttrSet->dwAction = dclActionNil; + } + } + + // Deserialize the LAZY_DECL_SEC_FLAG to identify serialization of CORSEC_ATTRSET (as opposed to '<' which would indicate a serialized permission as Xml) + BYTE firstChar = pBuffer[cbPos]; + cbPos++; + if(firstChar != LAZY_DECL_SEC_FLAG) + return S_FALSE; + + // Deserialize the attribute count + BYTE* pBufferNext; + IfFailRet(CPackedLen::SafeGetLength((BYTE const *)&pBuffer[cbPos], + (BYTE const *)pBufferEnd, + &pAttrSet->dwAttrCount, + (BYTE const **)&pBufferNext)); + + cbPos += pBufferNext - &pBuffer[cbPos]; + if(pAttrSet->dwAttrCount > 0) + { + pAttrSet->pAttrs = new (nothrow) CORSEC_ATTRIBUTE[pAttrSet->dwAttrCount]; + if(!pAttrSet->pAttrs) + return E_OUTOFMEMORY; + pAttrSet->dwAllocated = pAttrSet->dwAttrCount; + } + + // Deserialize the attributes + DWORD i; + for(i = 0; i < pAttrSet->dwAttrCount; i++) + { + CORSEC_ATTRIBUTE *pAttr = &pAttrSet->pAttrs[i]; + hr = SecurityAttributes::DeserializeAttribute(pAttr, pBuffer, cbBuffer, &cbPos); + if(FAILED(hr)) + return hr; + } + + return S_OK; +} + +// This function takes an array of COR_SECATTR (which wrap custom security attribute blobs) and +// converts it to an array of CORSEC_ATTRSET (which contains partially-parsed custom security attribute +// blobs grouped by SecurityAction). Note that you must delete all the pPermissions that this allocates +// for each COR_SECATTR +HRESULT STDMETHODCALLTYPE GroupSecurityAttributesByAction( + CORSEC_ATTRSET /*OUT*/rPermSets[], + COR_SECATTR rSecAttrs[], + ULONG cSecAttrs, + mdToken tkObj, + ULONG *pulErrorAttr, + CMiniMdRW* pMiniMd, + IMDInternalImport* pInternalImport) +{ + CONTRACTL + { + NOTHROW; + GC_TRIGGERS; + MODE_ANY; + } + CONTRACTL_END; + + HRESULT hr = S_OK; + DWORD i, j, k; + DWORD dwAction; + BYTE* pData = NULL; + CORSEC_ATTRIBUTE* pPerm; + mdTypeDef tkParent; + TypeDefRec* pTypeDefRec; + MemberRefRec* pMemberRefRec; + TypeRefRec* pTypeRefRec; + SIZE_T cbAllocationSize; + + // If you are calling this at compile-time, you should pass in pMiniMd, and pInternalImport should be NULL + // If you are calling this at run-time, you should pass in pInternalImport, and pMiniMd should be NULL + _ASSERTE((pMiniMd && !pInternalImport) || (!pMiniMd && pInternalImport)); + + // Calculate number and sizes of permission sets to produce. This depends on + // the security action code encoded as the single parameter to the + // constructor for each security custom attribute. + for (i = 0; i < cSecAttrs; i++) + { + if (pulErrorAttr) + *pulErrorAttr = i; + + // Perform basic validation of the header of each security custom + // attribute constructor call. + pData = (BYTE*)rSecAttrs[i].pCustomAttribute; + + // Check minimum length. + if (rSecAttrs[i].cbCustomAttribute < (sizeof(WORD) + sizeof(DWORD) + sizeof(WORD))) + { + VMPostError(CORSECATTR_E_TRUNCATED); + IfFailGo(CORSECATTR_E_TRUNCATED); + } + + // Check version. + if (GET_UNALIGNED_VAL16(pData) != 1) + { + VMPostError(CORSECATTR_E_BAD_VERSION); + IfFailGo(CORSECATTR_E_BAD_VERSION); + } + pData += sizeof(WORD); + + // Extract and check security action. + if(pData[2] == SERIALIZATION_TYPE_PROPERTY) // check to see if it's a HostProtection attribute w/o an action + dwAction = dclLinktimeCheck; + else + dwAction = GET_UNALIGNED_VAL32(pData); + if (dwAction == dclActionNil || dwAction > dclMaximumValue) + { + VMPostError(CORSECATTR_E_BAD_ACTION); + IfFailGo(CORSECATTR_E_BAD_ACTION); + } + + // All other declarative security only valid on types and methods. + if (TypeFromToken(tkObj) == mdtAssembly) + { + // Assemblies can only take permission requests. + if (dwAction != dclRequestMinimum && + dwAction != dclRequestOptional && + dwAction != dclRequestRefuse) + { + VMPostError(CORSECATTR_E_BAD_ACTION_ASM); + IfFailGo(CORSECATTR_E_BAD_ACTION_ASM); + } + } + else if (TypeFromToken(tkObj) == mdtTypeDef || TypeFromToken(tkObj) == mdtMethodDef) + { + // Types and methods can only take declarative security. + if (dwAction != dclRequest && + dwAction != dclDemand && + dwAction != dclAssert && + dwAction != dclDeny && + dwAction != dclPermitOnly && + dwAction != dclLinktimeCheck && + dwAction != dclInheritanceCheck) + { + VMPostError(CORSECATTR_E_BAD_ACTION_OTHER); + IfFailGo(CORSECATTR_E_BAD_ACTION_OTHER); + } + } + else + { + // Permission sets can't be attached to anything else. + VMPostError(CORSECATTR_E_BAD_PARENT); + IfFailGo(CORSECATTR_E_BAD_PARENT); + } + + rPermSets[dwAction].dwAttrCount++; + } + + // Initialize the descriptor for each type of permission set we are going to + // produce. + for (i = 0; i <= dclMaximumValue; i++) + { + if (rPermSets[i].dwAttrCount == 0) + continue; + + rPermSets[i].tkObj = tkObj; + rPermSets[i].dwAction = i; + rPermSets[i].pImport = NULL; + rPermSets[i].pAppDomain = NULL; + rPermSets[i].pAttrs = new (nothrow) CORSEC_ATTRIBUTE[rPermSets[i].dwAttrCount]; + IfNullGo(rPermSets[i].pAttrs); + + // Initialize a descriptor for each permission within the permission set. + for (j = 0, k = 0; j < rPermSets[i].dwAttrCount; j++, k++) + { + // Locate the next security attribute that contributes to this + // permission set. + for (; k < cSecAttrs; k++) + { + pData = (BYTE*)rSecAttrs[k].pCustomAttribute; + if(pData[4] == SERIALIZATION_TYPE_PROPERTY) // check to see if it's a HostProtection attribute w/o an action + dwAction = dclLinktimeCheck; + else + dwAction = GET_UNALIGNED_VAL32(pData + sizeof(WORD)); + if (dwAction == i) + break; + } + _ASSERTE(k < cSecAttrs); + + if (pulErrorAttr) + *pulErrorAttr = k; + + // Initialize the permission. + pPerm = &rPermSets[i].pAttrs[j]; + pPerm->tkCtor = rSecAttrs[k].tkCtor; + pPerm->dwIndex = k; + if(pData[4] == SERIALIZATION_TYPE_PROPERTY) // check to see if it's a HostProtection attribute w/o an action + { + _ASSERTE(!pPerm->pbValues); + //pPerm->pbValues = pData + (sizeof (WORD) + sizeof(WORD)); + if (!ClrSafeInt<SIZE_T>::subtraction(rSecAttrs[k].cbCustomAttribute, (sizeof (WORD) + sizeof(WORD)), pPerm->cbValues)) + return COR_E_OVERFLOW; + pPerm->wValues = GET_UNALIGNED_VAL16(pData + sizeof (WORD)); + // Prefast overflow sanity check the addition. + if (!ClrSafeInt<SIZE_T>::addition(pPerm->cbValues, sizeof(WORD), cbAllocationSize)) + return COR_E_OVERFLOW; + pPerm->pbValues = new (nothrow) BYTE[cbAllocationSize]; + if(!pPerm->pbValues) + return E_OUTOFMEMORY; + memcpy(pPerm->pbValues, pData + (sizeof (WORD) + sizeof(WORD)), pPerm->cbValues); + } + else + { + _ASSERTE(!pPerm->pbValues); + //pPerm->pbValues = pData + (sizeof (WORD) + sizeof(DWORD) + sizeof(WORD)); + if (!ClrSafeInt<SIZE_T>::subtraction(rSecAttrs[k].cbCustomAttribute, (sizeof (WORD) + sizeof (DWORD) + sizeof(WORD)), pPerm->cbValues)) + return COR_E_OVERFLOW; + pPerm->wValues = GET_UNALIGNED_VAL16(pData + sizeof (WORD) + sizeof(DWORD)); + // Prefast overflow sanity check the addition. + if (!ClrSafeInt<SIZE_T>::addition(pPerm->cbValues, sizeof(WORD), cbAllocationSize)) + return COR_E_OVERFLOW; + pPerm->pbValues = new (nothrow) BYTE[cbAllocationSize]; + if(!pPerm->pbValues) + return E_OUTOFMEMORY; + memcpy(pPerm->pbValues, pData + (sizeof (WORD) + sizeof(DWORD) + sizeof(WORD)), pPerm->cbValues); + } + + CQuickBytes qbFullName; + CHAR* szFullName = NULL; + + LPCSTR szTypeName; + LPCSTR szTypeNamespace; + + // Follow the security custom attribute constructor back up to its + // defining assembly (so we know how to load its definition). If the + // token resolution scope is not defined, it's assumed to be + // mscorlib. + if (TypeFromToken(rSecAttrs[k].tkCtor) == mdtMethodDef) + { + if (pMiniMd != NULL) + { + // scratch buffer for full type name + szFullName = (CHAR*) qbFullName.AllocNoThrow((MAX_CLASSNAME_LENGTH+1) * sizeof(CHAR)); + if(szFullName == NULL) + return E_OUTOFMEMORY; + + // grab the type that contains the security attribute constructor + IfFailGo(pMiniMd->FindParentOfMethodHelper(rSecAttrs[k].tkCtor, &tkParent)); + + // scratch buffer for nested type names + CQuickBytes qbBuffer; + CHAR* szBuffer; + + CHAR* szName = NULL; + BOOL fFirstLoop = TRUE; + pTypeDefRec = NULL; + do + { + // get outer type name + IfFailGo(pMiniMd->GetTypeDefRecord(RidFromToken(tkParent), &pTypeDefRec)); + IfFailGo(pMiniMd->getNameOfTypeDef(pTypeDefRec, (LPCSTR *)&szName)); + + // If this is the first time through the loop, just assign values, otherwise build nested type name. + if (!fFirstLoop) + { + szBuffer = (CHAR*) qbBuffer.AllocNoThrow((MAX_CLASSNAME_LENGTH+1) * sizeof(CHAR)); + if(szBuffer == NULL) + return E_OUTOFMEMORY; + + ns::MakeNestedTypeName(szBuffer, (MAX_CLASSNAME_LENGTH+1) * sizeof(CHAR), szName, szFullName); + szName = szBuffer; + } + else + { + fFirstLoop = FALSE; + } + + // copy into buffer + size_t localLen = strlen(szName) + 1; + strcpy_s(szFullName, localLen, szName); + + // move to next parent + DWORD dwFlags = pMiniMd->getFlagsOfTypeDef(pTypeDefRec); + if (IsTdNested(dwFlags)) + { + RID ridNestedRec; + IfFailGo(pMiniMd->FindNestedClassHelper(tkParent, &ridNestedRec)); + _ASSERTE(!InvalidRid(ridNestedRec)); + NestedClassRec *pNestedRec; + IfFailGo(pMiniMd->GetNestedClassRecord(ridNestedRec, &pNestedRec)); + tkParent = pMiniMd->getEnclosingClassOfNestedClass(pNestedRec); + } + else + { + tkParent = NULL; + } + } while (tkParent != NULL); + + IfFailGo(pMiniMd->getNamespaceOfTypeDef(pTypeDefRec, &szTypeNamespace)); + szTypeName = szFullName; + } + else + { + IfFailGo(pInternalImport->GetParentToken(rSecAttrs[k].tkCtor, &tkParent)); + IfFailGo(pInternalImport->GetNameOfTypeDef(tkParent, &szTypeName, &szTypeNamespace)); + } + pPerm->tkTypeRef = mdTokenNil; + pPerm->tkAssemblyRef = mdTokenNil; + } + else + { + _ASSERTE(TypeFromToken(rSecAttrs[k].tkCtor) == mdtMemberRef); + + // Get the type ref + if (pMiniMd != NULL) + { + IfFailGo(pMiniMd->GetMemberRefRecord(RidFromToken(rSecAttrs[k].tkCtor), &pMemberRefRec)); + pPerm->tkTypeRef = pMiniMd->getClassOfMemberRef(pMemberRefRec); + } + else + { + IfFailGo(pInternalImport->GetParentOfMemberRef(rSecAttrs[k].tkCtor, &pPerm->tkTypeRef)); + } + + _ASSERTE(TypeFromToken(pPerm->tkTypeRef) == mdtTypeRef); + + // Get an assembly ref + pPerm->tkAssemblyRef = pPerm->tkTypeRef; + pTypeRefRec = NULL; + do + { + if (pMiniMd != NULL) + { + IfFailGo(pMiniMd->GetTypeRefRecord(RidFromToken(pPerm->tkAssemblyRef), &pTypeRefRec)); + pPerm->tkAssemblyRef = pMiniMd->getResolutionScopeOfTypeRef(pTypeRefRec); + } + else + { + IfFailGo(pInternalImport->GetResolutionScopeOfTypeRef(pPerm->tkAssemblyRef, &pPerm->tkAssemblyRef)); + } + // loop because nested types have a resolution scope of the parent type rather than an assembly + } while(TypeFromToken(pPerm->tkAssemblyRef) == mdtTypeRef); + + // Figure out the fully qualified type name + if (pMiniMd != NULL) + { + IfFailGo(pMiniMd->getNamespaceOfTypeRef(pTypeRefRec, &szTypeNamespace)); + IfFailGo(pMiniMd->getNameOfTypeRef(pTypeRefRec, &szTypeName)); + } + else + { + IfFailGo(pInternalImport->GetNameOfTypeRef(pPerm->tkTypeRef, &szTypeNamespace, &szTypeName)); + } + } + + CQuickBytes qb; + CHAR* szTmp = (CHAR*) qb.AllocNoThrow((MAX_CLASSNAME_LENGTH+1) * sizeof(CHAR)); + if(szTmp == NULL) + return E_OUTOFMEMORY; + + ns::MakePath(szTmp, MAX_CLASSNAME_LENGTH, szTypeNamespace, szTypeName); + + size_t len = strlen(szTmp) + 1; + pPerm->pName = new (nothrow) CHAR[len]; + if(!pPerm->pName) + return E_OUTOFMEMORY; + strcpy_s(pPerm->pName, len, szTmp); + } + } + +ErrExit: + return hr; +} |