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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
#include "common.h"
#include "security.h"
#include "callhelpers.h"
#ifndef DACCESS_COMPILE
void ApplicationSecurityDescriptor::Resolve()
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
INJECT_FAULT(COMPlusThrowOM(););
SO_TOLERANT;
} CONTRACTL_END;
if (IsResolved())
return;
SetGrantedPermissionSet(NULL, NULL, 0xFFFFFFFF);
}
#ifndef CROSSGEN_COMPILE
//---------------------------------------------------------------------------------------
//
// Determine the security state of an AppDomain before the domain is fully configured.
// This method is used to detect the input configuration of a domain - specifically, if it
// is homogenous and fully trusted before domain setup is completed.
//
// Note that this state may not reflect the final state of the AppDomain when it is
// configured, since components like the AppDomainManager can modify these bits during execution.
//
void ApplicationSecurityDescriptor::PreResolve(BOOL *pfIsFullyTrusted, BOOL *pfIsHomogeneous)
{
CONTRACTL
{
GC_TRIGGERS;
THROWS;
MODE_ANY;
PRECONDITION(CheckPointer(pfIsFullyTrusted));
PRECONDITION(CheckPointer(pfIsHomogeneous));
PRECONDITION(IsInitializationInProgress()); // We shouldn't be looking at the pre-resolved state if we've already done real resolution
}
CONTRACTL_END;
if (m_fIsPreResolved)
{
*pfIsFullyTrusted = m_fPreResolutionFullTrust;
*pfIsHomogeneous = m_fPreResolutionHomogeneous;
return;
}
GCX_COOP();
// On CoreCLR all domains are partial trust homogenous
m_fPreResolutionFullTrust = FALSE;
m_fPreResolutionHomogeneous = TRUE;
*pfIsFullyTrusted = m_fPreResolutionFullTrust;
*pfIsHomogeneous = m_fPreResolutionHomogeneous;
m_fIsPreResolved = TRUE;
}
#endif // CROSSGEN_COMPILE
//
// PLS (PermissionListSet) optimization Implementation
// The idea of the PLS optimization is to maintain the intersection
// of the grant sets of all assemblies loaded into the AppDomain (plus
// the grant set of the AppDomain itself) and the union of all denied
// sets. When a demand is evaluated, we first check the permission
// that is being demanded against the combined grant and denied set
// and if that check succeeds, then we know the demand is satisfied
// in the AppDomain without having to perform an entire stack walk.
//
// Creates the PermissionListSet which holds the AppDomain level intersection of
// granted and denied permission sets of all assemblies in the domain and updates
// the granted and denied set with those of the AppDomain.
void ApplicationSecurityDescriptor::InitializePLS()
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
PRECONDITION(IsResolved());
INJECT_FAULT(COMPlusThrowOM(););
} CONTRACTL_END;
m_dwDomainWideSpecialFlags = m_dwSpecialFlags;
}
// Whenever a new assembly is added to the domain, we need to update the PermissionListSet
void ApplicationSecurityDescriptor::AddNewSecDescToPLS(AssemblySecurityDescriptor *pNewSecDescriptor)
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
PRECONDITION(pNewSecDescriptor->IsResolved());
INJECT_FAULT(COMPlusThrowOM(););
} CONTRACTL_END;
//
// If the assembly is fully trusted, this should be a no-op as the PLS is unaffected.
// Note it's Ok to call this method before the AppDomain is fully initialized (and so
// before the PLS is created for the AppDomain) because we enforce that all assemblies
// loaded during that phase are fully trusted.
//
if (!pNewSecDescriptor->IsFullyTrusted()) {
LONG dwNewDomainWideSpecialFlags = 0;
LONG dwOldDomainWideSpecialFlags = 0;
do {
dwOldDomainWideSpecialFlags = m_dwDomainWideSpecialFlags;
dwNewDomainWideSpecialFlags = (dwOldDomainWideSpecialFlags & pNewSecDescriptor->GetSpecialFlags());
}
while (InterlockedCompareExchange((LONG*)&m_dwDomainWideSpecialFlags, dwNewDomainWideSpecialFlags, dwOldDomainWideSpecialFlags) != dwOldDomainWideSpecialFlags);
}
}
DWORD ApplicationSecurityDescriptor::GetDomainWideSpecialFlag() const
{
LIMITED_METHOD_CONTRACT;
return m_dwDomainWideSpecialFlags;
}
void ApplicationSecurityDescriptor::FinishInitialization()
{
WRAPPER_NO_CONTRACT;
// Resolve the AppDomain security descriptor.
this->Resolve();
// Reset the initialization in-progress flag.
this->ResetInitializationInProgress();
// Initialize the PLS with the grant set of the AppDomain
this->InitializePLS();
}
void ApplicationSecurityDescriptor::SetHostSecurityManagerFlags(DWORD dwFlags)
{
LIMITED_METHOD_CONTRACT;
m_dwHostSecurityManagerFlags |= dwFlags;
}
void ApplicationSecurityDescriptor::SetPolicyLevelFlag()
{
LIMITED_METHOD_CONTRACT;
m_dwHostSecurityManagerFlags |= HOST_POLICY_LEVEL;
}
BOOL ApplicationSecurityDescriptor::IsHomogeneous() const
{
LIMITED_METHOD_CONTRACT;
return m_fHomogeneous;
}
// Should the HSM be consulted for security decisions in this AppDomain.
BOOL ApplicationSecurityDescriptor::CallHostSecurityManager()
{
LIMITED_METHOD_CONTRACT;
return (m_dwHostSecurityManagerFlags & HOST_APP_DOMAIN_EVIDENCE ||
m_dwHostSecurityManagerFlags & HOST_POLICY_LEVEL ||
m_dwHostSecurityManagerFlags & HOST_ASM_EVIDENCE ||
m_dwHostSecurityManagerFlags & HOST_RESOLVE_POLICY);
}
// The AppDomain is considered a default one (FT) if the property is set and it's not a homogeneous AppDomain
BOOL ApplicationSecurityDescriptor::IsDefaultAppDomain() const
{
LIMITED_METHOD_CONTRACT;
return m_fIsDefaultAppdomain
;
}
BOOL ApplicationSecurityDescriptor::IsDefaultAppDomainEvidence()
{
LIMITED_METHOD_CONTRACT;
return m_fIsDefaultAppdomainEvidence;// This need not be a default AD, but has no evidence. So we'll use the default AD evidence
}
// Indicates whether the initialization phase is in progress.
BOOL ApplicationSecurityDescriptor::IsInitializationInProgress()
{
LIMITED_METHOD_CONTRACT;
return m_fIsInitializationInProgress;
}
BOOL ApplicationSecurityDescriptor::ContainsAnyRefusedPermissions()
{
LIMITED_METHOD_CONTRACT;
return m_fContainsAnyRefusedPermissions;
}
// Is it possible for the AppDomain to contain partial trust code. This method may return true even if the
// domain does not currently have partial trust code in it - a true value simply means that it is possible
// for partial trust code to eventually end up in the domain.
BOOL ApplicationSecurityDescriptor::DomainMayContainPartialTrustCode()
{
WRAPPER_NO_CONTRACT;
return !m_fHomogeneous || !IsFullyTrusted();
}
#endif // !DACCESS_COMPILE
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