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//
// 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 "appdomainstack.h"
#include "appdomainstack.inl"
#include "security.h"
#include "securitypolicy.h"
#include "appdomain.inl"
#ifdef FEATURE_REMOTING
#include "crossdomaincalls.h"
#else
#include "callhelpers.h"
#endif
#ifdef _DEBUG
void AppDomainStack::CheckOverridesAssertCounts()
{
LIMITED_METHOD_CONTRACT;
DWORD dwAppDomainIndex = 0;
DWORD dwOverrides = 0;
DWORD dwAsserts = 0;
AppDomainStackEntry *pEntry = NULL;
for(dwAppDomainIndex=0;dwAppDomainIndex<m_numEntries;dwAppDomainIndex++)
{
pEntry = __GetEntryPtr(dwAppDomainIndex);
dwOverrides += pEntry->m_dwOverridesCount;
dwAsserts += pEntry->m_dwAsserts;
}
_ASSERTE(dwOverrides == m_dwOverridesCount);
_ASSERTE(dwAsserts == m_dwAsserts);
}
#endif
BOOL AppDomainStackEntry::IsFullyTrustedWithNoStackModifiers(void)
{
LIMITED_METHOD_CONTRACT;
if (m_domainID.m_dwId == INVALID_APPDOMAIN_ID || m_dwOverridesCount != 0 || m_dwAsserts != 0)
return FALSE;
AppDomainFromIDHolder pDomain(m_domainID, FALSE);
if (pDomain.IsUnloaded())
return FALSE;
IApplicationSecurityDescriptor *currAppSecDesc = pDomain->GetSecurityDescriptor();
if (currAppSecDesc == NULL)
return FALSE;
return Security::CheckDomainWideSpecialFlag(currAppSecDesc, 1 << SECURITY_FULL_TRUST);
}
BOOL AppDomainStackEntry::IsHomogeneousWithNoStackModifiers(void)
{
LIMITED_METHOD_CONTRACT;
if (m_domainID.m_dwId == INVALID_APPDOMAIN_ID || m_dwOverridesCount != 0 || m_dwAsserts != 0)
return FALSE;
AppDomainFromIDHolder pDomain(m_domainID, FALSE);
if (pDomain.IsUnloaded())
return FALSE;
IApplicationSecurityDescriptor *currAppSecDesc = pDomain->GetSecurityDescriptor();
if (currAppSecDesc == NULL)
return FALSE;
return (currAppSecDesc->IsHomogeneous() && !currAppSecDesc->ContainsAnyRefusedPermissions());
}
BOOL AppDomainStackEntry::HasFlagsOrFullyTrustedWithNoStackModifiers(DWORD flags)
{
LIMITED_METHOD_CONTRACT;
if (m_domainID.m_dwId == INVALID_APPDOMAIN_ID || m_dwOverridesCount != 0 || m_dwAsserts != 0)
return FALSE;
AppDomainFromIDHolder pDomain(m_domainID, FALSE);
if (pDomain.IsUnloaded())
return FALSE;
IApplicationSecurityDescriptor *currAppSecDesc = pDomain->GetSecurityDescriptor();
if (currAppSecDesc == NULL)
return FALSE;
// either the desired flag (often 0) or fully trusted will do
flags |= (1<<SECURITY_FULL_TRUST);
return Security::CheckDomainWideSpecialFlag(currAppSecDesc, flags);
}
void AppDomainStackEntry::UpdateHomogeneousPLS(OBJECTREF* homogeneousPLS)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
}
CONTRACTL_END;
AppDomainFromIDHolder domain(m_domainID, TRUE);
if (domain.IsUnloaded())
return;
IApplicationSecurityDescriptor *thisAppSecDesc = domain->GetSecurityDescriptor();
if (thisAppSecDesc->IsHomogeneous())
{
// update the intersection with the current grant set
NewArrayHolder<BYTE> pbtmpSerializedObject(NULL);
struct gc
{
OBJECTREF refGrantSet;
} gc;
ZeroMemory( &gc, sizeof( gc ) );
AppDomain* pCurrentDomain;
pCurrentDomain = GetAppDomain();
GCPROTECT_BEGIN( gc );
#ifdef FEATURE_REMOTING // should not be possible without remoting
DWORD cbtmpSerializedObject = 0;
if (pCurrentDomain->GetId() != m_domainID)
{
// Unlikely scenario where we have another homogeneous AD on the callstack that's different from
// the current one. If there's another AD on the callstack, it's likely to be FT.
ENTER_DOMAIN_ID(m_domainID)
{
// Release the holder to allow GCs. This is safe because we've entered the AD, so it won't go away.
domain.Release();
gc.refGrantSet = thisAppSecDesc->GetGrantedPermissionSet(NULL);
AppDomainHelper::MarshalObject(GetAppDomain(), &gc.refGrantSet, &pbtmpSerializedObject, &cbtmpSerializedObject);
if (pbtmpSerializedObject == NULL)
{
// this is an error: possibly an OOM prevented the blob from getting created.
// We could return null and let the managed code use a fully restricted object or throw here.
// Let's throw here...
COMPlusThrow(kSecurityException);
}
gc.refGrantSet = NULL;
}
END_DOMAIN_TRANSITION
AppDomainHelper::UnmarshalObject(pCurrentDomain,pbtmpSerializedObject, cbtmpSerializedObject, &gc.refGrantSet);
}
else
#else
_ASSERTE(pCurrentDomain->GetId() == m_domainID);
#endif //!FEATURE_CORECLR
{
// Release the holder to allow GCs. This is safe because we're running in this AD, so it won't go away.
domain.Release();
gc.refGrantSet = thisAppSecDesc->GetGrantedPermissionSet(NULL);
}
// At this point gc.refGrantSet has the grantSet of pDomain (thisAppSecDesc) in the current domain.
// We don't care about refused perms since we established there were
// none earlier for this call stack.
// Let's intersect with what we've already got.
PREPARE_NONVIRTUAL_CALLSITE(METHOD__PERMISSION_LIST_SET__UPDATE);
DECLARE_ARGHOLDER_ARRAY(args, 2);
args[ARGNUM_0] = OBJECTREF_TO_ARGHOLDER(*homogeneousPLS); // arg 0
args[ARGNUM_1] = OBJECTREF_TO_ARGHOLDER(gc.refGrantSet); // arg 1
CALL_MANAGED_METHOD_NORET(args);
GCPROTECT_END();
}
}
BOOL AppDomainStack::AllDomainsHomogeneousWithNoStackModifiers()
{
WRAPPER_NO_CONTRACT;
// Used primarily by CompressedStack code to decide if a CS has to be constructed
DWORD dwAppDomainIndex = 0;
InitDomainIteration(&dwAppDomainIndex);
while (dwAppDomainIndex != 0)
{
AppDomainStackEntry* pEntry = GetNextDomainEntryOnStack(&dwAppDomainIndex);
_ASSERTE(pEntry != NULL);
if (!pEntry->IsHomogeneousWithNoStackModifiers() && !pEntry->IsFullyTrustedWithNoStackModifiers())
return FALSE;
}
return TRUE;
}
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