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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 "eventtrace.h"
///////////////////////////////////////////////////////////////////////////////
//
// [SecurityDescriptor]
// |
// |
// +----[PEFileSecurityDescriptor]
//
///////////////////////////////////////////////////////////////////////////////
BOOL SecurityDescriptor::CanCallUnmanagedCode () const
{
CONTRACTL {
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
PRECONDITION(IsResolved() || m_pAppDomain->GetSecurityDescriptor()->IsInitializationInProgress());
} CONTRACTL_END;
return CheckSpecialFlag(1 << SECURITY_UNMANAGED_CODE);
}
#ifndef DACCESS_COMPILE
OBJECTREF SecurityDescriptor::GetGrantedPermissionSet(OBJECTREF* pRefusedPermissions)
{
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
PRECONDITION(IsResolved() || m_pAppDomain->GetSecurityDescriptor()->IsInitializationInProgress());
INJECT_FAULT(COMPlusThrowOM(););
} CONTRACTL_END;
#ifndef CROSSGEN_COMPILE
if (pRefusedPermissions)
*pRefusedPermissions = ObjectFromLazyHandle(m_hGrantDeniedPermissionSet, m_pLoaderAllocator);
return ObjectFromLazyHandle(m_hGrantedPermissionSet, m_pLoaderAllocator);
#else
return NULL;
#endif
}
//
// Returns TRUE if the given zone has the given special permission.
//
#ifdef FEATURE_CAS_POLICY
BOOL SecurityDescriptor::CheckQuickCache(SecurityConfig::QuickCacheEntryType all, DWORD dwZone)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
MODE_ANY;
PRECONDITION(m_pAppDomain->GetSecurityDescriptor()->IsLegacyCasPolicyEnabled());
PRECONDITION(SecurityPolicy::s_fPolicyInitialized);
} CONTRACTL_END;
static const SecurityConfig::QuickCacheEntryType zoneTable[] =
{
SecurityConfig::FullTrustZoneMyComputer,
SecurityConfig::FullTrustZoneIntranet,
SecurityConfig::FullTrustZoneTrusted,
SecurityConfig::FullTrustZoneInternet,
SecurityConfig::FullTrustZoneUntrusted
};
// If an additional evidence was provided, then perform the normal
// policy resolution. This is true for all AppDomains and also for
// assemblies loaded with a specific additional evidence. Note that
// for the default AppDomain, the policy resolution code paths short
// circuits the parsing of the security XML files by granting FullTrust
// to the default AppDomain.
if (m_hAdditionalEvidence != NULL)
return FALSE;
BOOL fMachine = SecurityConfig::GetQuickCacheEntry(SecurityConfig::MachinePolicyLevel, all);
BOOL fUser = SecurityConfig::GetQuickCacheEntry(SecurityConfig::UserPolicyLevel, all);
BOOL fEnterprise = SecurityConfig::GetQuickCacheEntry(SecurityConfig::EnterprisePolicyLevel, all);
if (fMachine && fUser && fEnterprise)
return TRUE;
// If we can't match for all, try for our zone.
if (dwZone == 0xFFFFFFFF)
return FALSE;
fMachine = SecurityConfig::GetQuickCacheEntry(SecurityConfig::MachinePolicyLevel, zoneTable[dwZone]);
fUser = SecurityConfig::GetQuickCacheEntry(SecurityConfig::UserPolicyLevel, zoneTable[dwZone]);
fEnterprise = SecurityConfig::GetQuickCacheEntry(SecurityConfig::EnterprisePolicyLevel, zoneTable[dwZone]);
return (fMachine && fUser && fEnterprise);
}
#endif // FEATURE_CAS_POLICY
#endif // DACCESS_COMPILE
#ifdef FEATURE_CAS_POLICY
BOOL SecurityDescriptor::IsEvidenceComputed() const
{
LIMITED_METHOD_CONTRACT;
return m_fEvidenceComputed;
}
#endif //FEATURE_CAS_POLICY
//
// This method will return TRUE if this object is fully trusted.
//
BOOL SecurityDescriptor::IsFullyTrusted ()
{
CONTRACTL {
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
SUPPORTS_DAC;
SO_TOLERANT;
PRECONDITION(IsResolved() || m_pAppDomain->GetSecurityDescriptor()->IsInitializationInProgress());
} CONTRACTL_END;
return CheckSpecialFlag(1 << SECURITY_FULL_TRUST);
}
BOOL SecurityDescriptor::IsResolved() const
{
LIMITED_METHOD_CONTRACT;
return m_fSDResolved;
}
DWORD SecurityDescriptor::GetSpecialFlags() const
{
LIMITED_METHOD_CONTRACT;
return m_dwSpecialFlags;
}
#ifndef DACCESS_COMPILE
void SecurityDescriptor::SetGrantedPermissionSet(OBJECTREF GrantedPermissionSet,
OBJECTREF DeniedPermissionSet,
DWORD dwSpecialFlags)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
MODE_ANY;
}
CONTRACTL_END;
#ifndef CROSSGEN_COMPILE
GCPROTECT_BEGIN(DeniedPermissionSet);
StoreObjectInLazyHandle(m_hGrantedPermissionSet, GrantedPermissionSet, m_pLoaderAllocator);
StoreObjectInLazyHandle(m_hGrantDeniedPermissionSet, DeniedPermissionSet, m_pLoaderAllocator);
GCPROTECT_END();
#endif
if (dwSpecialFlags & (1 << SECURITY_FULL_TRUST))
{
m_dwSpecialFlags = 0xFFFFFFFF; // Fulltrust means that all possible quick checks should succeed, so we set all flags
}
else
{
m_dwSpecialFlags = dwSpecialFlags;
}
m_fSDResolved = TRUE;
}
#ifdef FEATURE_CAS_POLICY
void SecurityDescriptor::SetEvidence(OBJECTREF evidence)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
MODE_ANY;
PRECONDITION(evidence != NULL);
}
CONTRACTL_END;
if (evidence != NULL)
{
StoreObjectInLazyHandle(m_hAdditionalEvidence, evidence, m_pLoaderAllocator);
SetEvidenceComputed();
}
}
#endif // FEATURE_CAS_POLICY
#endif // !DACCESS_COMPILE
AppDomain* SecurityDescriptor::GetDomain() const
{
LIMITED_METHOD_CONTRACT;
return m_pAppDomain;
}
#ifndef DACCESS_COMPILE
#ifdef FEATURE_CAS_POLICY
//---------------------------------------------------------------------------------------
//
// Build an evidence collection which can generate evidence about a PEFile
//
// Arguments:
// pPEFile - PEFile the evidence collection will generate evidence for
// objHostSuppliedEvidence - additional evidence to merge into the collection supplied by the host
//
// Return Value:
// Evidence collection which targets this PEFile
//
// Notes:
// Calls System.Security.Policy.PEFileEvidenceFactory.CreateSecurityIdentity
//
// static
OBJECTREF PEFileSecurityDescriptor::BuildEvidence(PEFile *pPEFile, const OBJECTREF& objHostSuppliedEvidence)
{
CONTRACTL
{
THROWS;
GC_TRIGGERS;
MODE_COOPERATIVE;
PRECONDITION(CheckPointer(pPEFile));
}
CONTRACTL_END;
struct
{
SAFEHANDLE objPEFile;
OBJECTREF objHostSuppliedEvidence;
OBJECTREF objEvidence;
}
gc;
ZeroMemory(&gc, sizeof(gc));
GCPROTECT_BEGIN(gc);
BEGIN_SO_INTOLERANT_CODE(GetThread());
gc.objPEFile = pPEFile->GetSafeHandle();
gc.objHostSuppliedEvidence = objHostSuppliedEvidence;
MethodDescCallSite createSecurityIdentity(METHOD__PEFILE_EVIDENCE_FACTORY__CREATE_SECURITY_IDENTITY);
ARG_SLOT args[] =
{
ObjToArgSlot(gc.objPEFile),
ObjToArgSlot(gc.objHostSuppliedEvidence)
};
gc.objEvidence = createSecurityIdentity.Call_RetOBJECTREF(args);
END_SO_INTOLERANT_CODE;
GCPROTECT_END();
return gc.objEvidence;
}
#endif // FEATURE_CAS_POLICY
#endif // !DACCESS_COMPILE
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