internal PermissionSet CodeGroupResolve(Evidence evidence, bool systemPolicy)
{
PermissionSet permissionSet = null;
IEnumerator enumerator = this.PolicyLevels.GetEnumerator();
evidence.GetHostEvidence <Zone>();
evidence.GetHostEvidence <StrongName>();
evidence.GetHostEvidence <Url>();
byte[] serializedEvidence = evidence.RawSerialize();
int rawCount = evidence.RawCount;
bool flag = AppDomain.CurrentDomain.GetData("IgnoreSystemPolicy") != null;
bool flag2 = false;
while (enumerator.MoveNext())
{
object obj = enumerator.Current;
PolicyLevel policyLevel = (PolicyLevel)obj;
if (systemPolicy)
{
if (policyLevel.Type == PolicyLevelType.AppDomain)
{
continue;
}
}
else if (flag && policyLevel.Type != PolicyLevelType.AppDomain)
{
continue;
}
PolicyStatement policyStatement = policyLevel.Resolve(evidence, rawCount, serializedEvidence);
if (permissionSet == null)
{
permissionSet = policyStatement.PermissionSet;
}
else
{
permissionSet.InplaceIntersect(policyStatement.GetPermissionSetNoCopy());
}
if (permissionSet == null || permissionSet.FastIsEmpty())
{
break;
}
if ((policyStatement.Attributes & PolicyStatementAttribute.LevelFinal) == PolicyStatementAttribute.LevelFinal)
{
if (policyLevel.Type != PolicyLevelType.AppDomain)
{
flag2 = true;
break;
}
break;
}
}
if (permissionSet != null && flag2)
{
PolicyLevel policyLevel2 = null;
for (int i = this.PolicyLevels.Count - 1; i >= 0; i--)
{
PolicyLevel policyLevel = (PolicyLevel)this.PolicyLevels[i];
if (policyLevel.Type == PolicyLevelType.AppDomain)
{
policyLevel2 = policyLevel;
break;
}
}
if (policyLevel2 != null)
{
PolicyStatement policyStatement = policyLevel2.Resolve(evidence, rawCount, serializedEvidence);
permissionSet.InplaceIntersect(policyStatement.GetPermissionSetNoCopy());
}
}
if (permissionSet == null)
{
permissionSet = new PermissionSet(PermissionState.None);
}
if (!permissionSet.IsUnrestricted())
{
IEnumerator hostEnumerator = evidence.GetHostEnumerator();
while (hostEnumerator.MoveNext())
{
object obj2 = hostEnumerator.Current;
IIdentityPermissionFactory identityPermissionFactory = obj2 as IIdentityPermissionFactory;
if (identityPermissionFactory != null)
{
IPermission permission = identityPermissionFactory.CreateIdentityPermission(evidence);
if (permission != null)
{
permissionSet.AddPermission(permission);
}
}
}
}
permissionSet.IgnoreTypeLoadFailures = true;
return(permissionSet);
}
