public static void Eval(this IDiscretionaryAcl dacl, Type rightType, SecurityResults securityResults)
{
string rtn = rightType.GetFriendlyRightTypeName();
IEnumerable <IAccessControlEntry> found = from ace in dacl
where ace.RightData.FriendlyTypeName.Equals(rtn)
select ace;
List <IAccessControlEntry> aces = new List <IAccessControlEntry>(found);
EvalAceList(rightType, aces, securityResults);
}
//HACK: Minor hack to address extended rights where the bitmask doesn't bear it out naturally.
//NOTE: If I was smarter, I would be able to figure out the right bitmask for SyncRights and then probably drop the hack.
static void EvalExtended(Type rightType, int summaryMask, SecurityResults securityResults, RightsAccessorAttribute ra)
{
if (rightType.GetType() == typeof(SynchronizationRight))
{
//this is just to block having "OneWay" as the only specified right
securityResults.GetByTypeRight(rightType, (int)SynchronizationRight.OneWay).AccessAllowed =
(summaryMask & (int)SynchronizationRight.Upload) == (int)SynchronizationRight.Upload ||
(summaryMask & (int)SynchronizationRight.Download) == (int)SynchronizationRight.Download;
}
}
static void EvalAceList(Type rightType, List <IAccessControlEntry> aces, SecurityResults securityResults)
{
if (!securityResults.ContainsRightType(rightType))
{
securityResults.InitResult(rightType);
}
if (aces.Count > 0)
{
aces.Sort(new AceComparer());
//Logic: Look in the Dacl for aces of the given AceType, create a new mask of the combined rights.
// If Allowed: bitwise-OR the value into the mask.
// If Deined: if the mask contains the value, XOR the value out.
//The result mask contains only the allowed rights.
int mask = 0;
foreach (IAccessControlEntry ace in aces)
{
if (ace.Allowed)
{
mask |= ace.RightData.Value;
}
else if ((mask & ace.RightData.Value) == ace.RightData.Value)
{
mask ^= ace.RightData.Value;
}
}
//For each right of the given acetype, perform a bitwise - AND to see if the right is specified in the mask.
int[] rights = rightType.GetRightTypeValues();
for (int i = 0; i < rights.Length; i++)
{
securityResults.GetByTypeRight(rightType, rights[i]).AccessAllowed = (mask & rights[i]) == rights[i];
}
RightsAccessorAttribute attrib =
(RightsAccessorAttribute)Attribute.GetCustomAttribute(rightType.GetType(), typeof(RightsAccessorAttribute));
if (attrib != null && attrib.HasMask)
{
EvalExtended(rightType, mask, securityResults, attrib);
}
}
}
public static void Eval(this IDiscretionaryAcl dacl, SecurityResults securityResults)
{
Dictionary <Type, List <IAccessControlEntry> > aceLists = new Dictionary <Type, List <IAccessControlEntry> >();
foreach (IAccessControlEntry ace in dacl)
{
if (!aceLists.ContainsKey(ace.RightData.RightType))
{
aceLists[ace.RightData.RightType] = new List <IAccessControlEntry>();
}
aceLists[ace.RightData.RightType].Add(ace);
}
foreach (Type rightType in aceLists.Keys)
{
EvalAceList(rightType, aceLists[rightType], securityResults);
}
}
public static void Eval <T>(this IDiscretionaryAcl dacl, SecurityResults securityResults) where T : struct, IConvertible
{
Eval(dacl, typeof(T), securityResults);
}
static void EvalAceList(Type rightType, List <IAccessControlEntryAudit> aces, SecurityResults securityResults)
{
if (!securityResults.ContainsRightType(rightType))
{
securityResults.InitResult(rightType);
}
if (aces.Count > 0)
{
aces.Sort(new AceComparer());
//Logic: Look in the Sacl for aces of the given AceType, create a new mask of the combined rights.
// If Allowed: bitwise-OR the value into the allowedMask.
// If Denied: bitwise-OR the value into the deniedMask.
//The result mask contains only the allowed rights.
int allowedMask = 0;
int deniedMask = 0;
foreach (IAccessControlEntryAudit ace in aces)
{
if (ace.Allowed)
{
allowedMask |= ace.RightData.Value;
}
if (ace.Denied)
{
deniedMask |= ace.RightData.Value;
}
}
//For each right of the given acetype, perform a bitwise-AND to see if the right is specified in the mask.
int[] rights = rightType.GetRightTypeValues();
int right = 0;
for (int i = 0; i < rights.Length; i++)
{
right = rights[i];
securityResults.GetByTypeRight(rightType, right).AuditSuccess = (allowedMask & right) == right;
securityResults.GetByTypeRight(rightType, right).AuditFailure = (deniedMask & right) == right;
}
}
}
public static void Eval <T>(this ISystemAcl sacl, SecurityResults securityResults) where T : struct, IConvertible
{
Eval(sacl, typeof(T), securityResults);
}