//
// Authors:
// Nick Drochak(ndrochak@gol.com)
-// Sebastien Pouliot (spouliot@motus.com)
+// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) Nick Drochak
// Portions (C) 2003, 2004 Motus Technologies Inc. (http://www.motus.com)
-//
-
-//
-// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
-//
-// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
-//
-// Permission is hereby granted, free of charge, to any person obtaining
-// a copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to
-// permit persons to whom the Software is furnished to do so, subject to
-// the following conditions:
-//
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-//
-
-using System;
using System.Collections;
-using System.Security.Permissions;
-using System.Security;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
using System.Runtime.Serialization;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Security.Permissions;
+using System.Security.Policy;
+using System.Text;
+using System.Threading;
namespace System.Security {
[Serializable]
+ // Microsoft public key - i.e. only MS signed assembly can inherit from PermissionSet (1.x) or (2.0) FullTrust assemblies
+ [StrongNameIdentityPermission (SecurityAction.InheritanceDemand, PublicKey="002400000480000094000000060200000024000052534131000400000100010007D1FA57C4AED9F0A32E84AA0FAEFD0DE9E8FD6AEC8F87FB03766C834C99921EB23BE79AD9D5DCC1DD9AD236132102900B723CF980957FC4E177108FC607774F29E8320E92EA05ECE4E821C0A5EFE8F1645C4C0C93C1AB99285D622CAA652C1DFAD63D745D6F2DE5F17E5EAF0FC4963D261C8A12436518206DC093344D5AD293")]
+#if NET_2_0
+ [ComVisible (true)]
+#endif
+ [MonoTODO ("CAS support is experimental (and unsupported).")]
public class PermissionSet: ISecurityEncodable, ICollection, IEnumerable, IStackWalk, IDeserializationCallback {
+ private const string tagName = "PermissionSet";
+ private const int version = 1;
+ private static object[] psUnrestricted = new object [1] { PermissionState.Unrestricted };
+
private PermissionState state;
private ArrayList list;
+ private PolicyLevel _policyLevel;
+ private bool _declsec;
+ private bool _readOnly;
+ private bool[] _ignored; // for asserts and non-CAS permissions
// constructors
list = new ArrayList ();
}
- public PermissionSet (PermissionState state)
+ public PermissionSet (PermissionState state) : this ()
{
- if (!Enum.IsDefined(typeof(System.Security.Permissions.PermissionState), state))
- throw new System.ArgumentException(); // state is not a valid System.Security.Permissions.PermissionState value.
- this.state = state;
- list = new ArrayList ();
+ this.state = CodeAccessPermission.CheckPermissionState (state, true);
}
- public PermissionSet (PermissionSet permSet) : this (PermissionState.None)
+ public PermissionSet (PermissionSet permSet) : this ()
{
// LAMESPEC: This would be handled by the compiler. No way permSet is not a PermissionSet.
//if (!(permSet is PermissionSet))
// throw new System.ArgumentException(); // permSet is not an instance of System.Security.PermissionSet.
- if (permSet == null)
- state = PermissionState.Unrestricted;
- else {
+ if (permSet != null) {
+ state = permSet.state;
foreach (IPermission p in permSet.list)
list.Add (p);
}
+#if !NET_2_0
+ else {
+ state = PermissionState.Unrestricted;
+ }
+#endif
+ }
+
+ internal PermissionSet (string xml)
+ : this ()
+ {
+ state = PermissionState.None;
+ if (xml != null) {
+ SecurityElement se = SecurityElement.FromString (xml);
+ FromXml (se);
+ }
+ }
+
+ // Light version for creating a (non unrestricted) PermissionSet with
+ // a single permission. This allows to relax most validations.
+ internal PermissionSet (IPermission perm)
+ : this ()
+ {
+ if (perm != null) {
+ // note: we do not copy IPermission like AddPermission
+ list.Add (perm);
+ }
}
// methods
+#if NET_2_0
+ public IPermission AddPermission (IPermission perm)
+#else
public virtual IPermission AddPermission (IPermission perm)
+#endif
{
- if (perm == null)
- return null;
+ if ((perm == null) || _readOnly)
+ return perm;
- IPermission existing = GetPermission (perm.GetType ());
- if (existing != null)
+ // we don't add to an unrestricted permission set unless...
+ if (state == PermissionState.Unrestricted) {
+#if NET_2_0
+ // identity permissions can be unrestricted under 2.x
+ {
+#else
+ // we're adding identity permission as they don't support unrestricted
+ if (perm is IUnrestrictedPermission) {
+#endif
+ // we return the union of the permission with unrestricted
+ // which results in a permission of the same type initialized
+ // with PermissionState.Unrestricted
+ return (IPermission) Activator.CreateInstance (perm.GetType (), psUnrestricted);
+ }
+ }
+
+ // we can't add two permissions of the same type in a set
+ // so we remove an existing one, union with it and add it back
+ IPermission existing = RemovePermission (perm.GetType ());
+ if (existing != null) {
perm = perm.Union (existing);
+ }
+ // note: Add doesn't copy
list.Add (perm);
return perm;
}
- [MonoTODO()]
+ [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
+ [SecurityPermission (SecurityAction.Demand, Assertion = true)]
+#if NET_2_0
+ public void Assert ()
+#else
public virtual void Assert ()
+#endif
+ {
+ int count = this.Count;
+
+ // we (current frame) must have the permission to assert it to others
+ // otherwise we don't assert (but we don't throw an exception)
+ foreach (IPermission p in list) {
+ // note: we ignore non-CAS permissions
+ if (p is IStackWalk) {
+ if (!SecurityManager.IsGranted (p)) {
+ return;
+ }
+ } else
+ count--;
+ }
+
+ // note: we must ignore the stack modifiers for the non-CAS permissions
+ if (SecurityManager.SecurityEnabled && (count > 0))
+ throw new NotSupportedException ("Currently only declarative Assert are supported.");
+ }
+
+ internal void Clear ()
{
+ list.Clear ();
}
public virtual PermissionSet Copy ()
public virtual void CopyTo (Array array, int index)
{
- if (array.Rank > 1)
- throw new System.ArgumentException("Array has more than one dimension"); // array has more than one dimension.
- if (index < 0 || index >= array.Length)
- throw new System.IndexOutOfRangeException(); // index is outside the range of allowable values for array.
if (null == array)
- throw new System.ArgumentNullException(); // array is null.
- list.CopyTo (array, index);
+ throw new ArgumentNullException ("array");
+
+ if (list.Count > 0) {
+ if (array.Rank > 1) {
+ throw new ArgumentException (Locale.GetText (
+ "Array has more than one dimension"));
+ }
+ if (index < 0 || index >= array.Length) {
+ throw new IndexOutOfRangeException ("index");
+ }
+
+ list.CopyTo (array, index);
+ }
}
- [MonoTODO()]
+#if NET_2_0
+ public void Demand ()
+#else
public virtual void Demand ()
+#endif
{
+ // Note: SecurityEnabled only applies to CAS permissions
+ // so we're not checking for it (yet)
+ if (IsEmpty ())
+ return;
+
+ int n = list.Count;
+ if ((_ignored == null) || (_ignored.Length != n)) {
+ _ignored = new bool [n];
+ }
+
+ bool call_cas_only = this.IsUnrestricted ();
+ // non CAS permissions (e.g. PrincipalPermission) do not requires a stack walk
+ for (int i = 0; i < n; i++) {
+ IPermission p = (IPermission) list [i];
+ Type t = p.GetType ();
+ if (t.IsSubclassOf (typeof (CodeAccessPermission))) {
+ _ignored [i] = false;
+ call_cas_only = true;
+ } else {
+ _ignored [i] = true;
+ p.Demand ();
+ }
+ }
+
+ // don't start the stack walk if
+ // - the permission set only contains non CAS permissions; or
+ // - security isn't enabled (applis only to CAS!)
+ if (call_cas_only && SecurityManager.SecurityEnabled)
+ CasOnlyDemand (_declsec ? 5 : 3);
}
- [MonoTODO()]
+ // The number of frames to skip depends on who's calling
+ // - CodeAccessPermission.Demand (imperative)
+ // - PermissionSet.Demand (imperative)
+ // - SecurityManager.InternalDemand (declarative)
+ internal void CasOnlyDemand (int skip)
+ {
+ Assembly current = null;
+ AppDomain domain = null;
+
+ if (_ignored == null) {
+ // special case when directly called from CodeAccessPermission.Demand
+ _ignored = new bool [list.Count];
+ }
+
+ ArrayList frames = SecurityFrame.GetStack (skip);
+ if ((frames != null) && (frames.Count > 0)) {
+ SecurityFrame first = ((SecurityFrame) frames [0]);
+ current = first.Assembly;
+ domain = first.Domain;
+ // skip ourself, Demand and other security runtime methods
+ foreach (SecurityFrame sf in frames) {
+ if (ProcessFrame (sf, ref current, ref domain)) {
+ if (AllIgnored ())
+ return; // reached Assert
+ }
+ }
+ SecurityFrame last = ((SecurityFrame) frames [frames.Count - 1]);
+ CheckAssembly (current, last);
+ CheckAppDomain (domain, last);
+ }
+
+ // Is there a CompressedStack to handle ?
+ CompressedStack stack = Thread.CurrentThread.GetCompressedStack ();
+ if ((stack != null) && !stack.IsEmpty ()) {
+ foreach (SecurityFrame frame in stack.List) {
+ if (ProcessFrame (frame, ref current, ref domain)) {
+ if (AllIgnored ())
+ return; // reached Assert
+ }
+ }
+ }
+ }
+
+ [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
+#if NET_2_0
+ public void Deny ()
+#else
public virtual void Deny ()
+#endif
{
+ if (!SecurityManager.SecurityEnabled)
+ return;
+
+ foreach (IPermission p in list) {
+ // note: we ignore non-CAS permissions
+ if (p is IStackWalk) {
+ throw new NotSupportedException ("Currently only declarative Deny are supported.");
+ }
+ }
}
- // to be re-used by NamedPermissionSet (and other derived classes)
- internal void FromXml (SecurityElement et, string className)
+ public virtual void FromXml (SecurityElement et)
{
if (et == null)
throw new ArgumentNullException ("et");
- if (et.Tag != "PermissionSet")
- throw new ArgumentException ("not PermissionSet");
- if (!(et.Attributes ["class"] as string).EndsWith (className))
- throw new ArgumentException ("not " + className);
-// version isn't checked
-// if ((et.Attributes ["version"] as string) != "1")
-// throw new ArgumentException ("wrong version");
-
- if ((et.Attributes ["Unrestricted"] as string) == "true")
+ if (et.Tag != tagName) {
+ string msg = String.Format ("Invalid tag {0} expected {1}", et.Tag, tagName);
+ throw new ArgumentException (msg, "et");
+ }
+
+ list.Clear ();
+
+ if (CodeAccessPermission.IsUnrestricted (et)) {
state = PermissionState.Unrestricted;
- else
+#if NET_2_0
+ // no need to continue for an unrestricted permission
+ // because identity permissions now "supports" unrestricted
+ return;
+#endif
+ } else {
state = PermissionState.None;
- }
+ }
- public virtual void FromXml (SecurityElement et)
- {
- list.Clear ();
- FromXml (et, "PermissionSet");
if (et.Children != null) {
foreach (SecurityElement se in et.Children) {
- string className = (se.Attributes ["class"] as string);
- Type classType = Type.GetType (className);
- object [] psNone = new object [1] { PermissionState.None };
- IPermission p = (IPermission) Activator.CreateInstance (classType, psNone);
- p.FromXml (se);
- list.Add (p);
+ string className = se.Attribute ("class");
+ if (className == null) {
+ throw new ArgumentException (Locale.GetText (
+ "No permission class is specified."));
+ }
+ if (Resolver != null) {
+ // policy class names do not have to be fully qualified
+ className = Resolver.ResolveClassName (className);
+ }
+
+ list.Add (PermissionBuilder.Create (className, se));
}
}
}
+#if NET_2_0
+ public IEnumerator GetEnumerator ()
+#else
public virtual IEnumerator GetEnumerator ()
+#endif
{
return list.GetEnumerator ();
}
- public virtual bool IsSubsetOf (PermissionSet target)
+#if NET_2_0
+ public bool IsSubsetOf (PermissionSet target)
{
// if target is empty we must be empty too
if ((target == null) || (target.IsEmpty ()))
return this.IsEmpty ();
- // if we're unrestricted then target must also be unrestricted
- if (this.IsUnrestricted () && target.IsUnrestricted ())
+
+ // all permissions support unrestricted in 2.0
+ if (target.IsUnrestricted ())
return true;
+ if (this.IsUnrestricted ())
+ return false;
+#else
+ public virtual bool IsSubsetOf (PermissionSet target)
+ {
+#endif
+ if (this.IsUnrestricted () && ((target == null) || !target.IsUnrestricted ()))
+ return false;
// if each of our permission is (a) present and (b) a subset of target
foreach (IPermission p in list) {
- // for every type in both list
- IPermission i = target.GetPermission (p.GetType ());
- if (i == null)
- return false; // not present (condition a)
- if (!p.IsSubsetOf (i))
- return false; // not a subset (condition b)
+#if !NET_2_0
+ if (target == null) {
+ if (!p.IsSubsetOf (null))
+ return false;
+ } else
+#endif
+ {
+ // non CAS permissions must be evaluated for unrestricted
+ Type t = p.GetType ();
+ IPermission i = null;
+ if (target.IsUnrestricted () && (p is CodeAccessPermission) && (p is IUnrestrictedPermission)) {
+ i = (IPermission) Activator.CreateInstance (t, psUnrestricted);
+ } else {
+ i = target.GetPermission (t);
+ }
+
+ if (!p.IsSubsetOf (i))
+ return false; // not a subset (condition b)
+ }
}
return true;
}
- [MonoTODO()]
+ [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
+#if NET_2_0
+ public void PermitOnly ()
+#else
public virtual void PermitOnly ()
+#endif
{
+ if (!SecurityManager.SecurityEnabled)
+ return;
+
+ foreach (IPermission p in list) {
+ // note: we ignore non-CAS permissions
+ if (p is IStackWalk) {
+ throw new NotSupportedException ("Currently only declarative Deny are supported.");
+ }
+ }
}
public bool ContainsNonCodeAccessPermissions ()
{
- foreach (IPermission p in list) {
- if (! p.GetType ().IsSubclassOf (typeof(CodeAccessPermission)))
- return true;
+ if (list.Count > 0) {
+ foreach (IPermission p in list) {
+ if (! p.GetType ().IsSubclassOf (typeof (CodeAccessPermission)))
+ return true;
+ }
}
return false;
}
- // undocumented behavior
- [MonoTODO()]
+ // FIXME little documentation in Fx 2.0 beta 1
public static byte[] ConvertPermissionSet (string inFormat, byte[] inData, string outFormat)
{
- return null;
+ if (inFormat == null)
+ throw new ArgumentNullException ("inFormat");
+ if (outFormat == null)
+ throw new ArgumentNullException ("outFormat");
+ if (inData == null)
+ return null;
+
+ if (inFormat == outFormat)
+ return inData;
+
+ PermissionSet ps = null;
+
+ if (inFormat == "BINARY") {
+ if (outFormat.StartsWith ("XML")) {
+ using (MemoryStream ms = new MemoryStream (inData)) {
+ BinaryFormatter formatter = new BinaryFormatter ();
+ ps = (PermissionSet) formatter.Deserialize (ms);
+ ms.Close ();
+ }
+ string xml = ps.ToString ();
+ switch (outFormat) {
+ case "XML":
+ case "XMLASCII":
+ return Encoding.ASCII.GetBytes (xml);
+ case "XMLUNICODE":
+ return Encoding.Unicode.GetBytes (xml);
+ }
+ }
+ }
+ else if (inFormat.StartsWith ("XML")) {
+ if (outFormat == "BINARY") {
+ string xml = null;
+ switch (inFormat) {
+ case "XML":
+ case "XMLASCII":
+ xml = Encoding.ASCII.GetString (inData);
+ break;
+ case "XMLUNICODE":
+ xml = Encoding.Unicode.GetString (inData);
+ break;
+ }
+ if (xml != null) {
+ ps = new PermissionSet (PermissionState.None);
+ ps.FromXml (SecurityElement.FromString (xml));
+
+ MemoryStream ms = new MemoryStream ();
+ BinaryFormatter formatter = new BinaryFormatter ();
+ formatter.Serialize (ms, ps);
+ ms.Close ();
+ return ms.ToArray ();
+ }
+ }
+ else if (outFormat.StartsWith ("XML")) {
+ string msg = String.Format (Locale.GetText ("Can't convert from {0} to {1}"), inFormat, outFormat);
+#if NET_2_0
+ throw new XmlSyntaxException (msg);
+#else
+ throw new ArgumentException (msg);
+#endif
+ }
+ }
+ else {
+ // unknown inFormat, returns null
+ return null;
+ }
+ // unknown outFormat, throw
+ throw new SerializationException (String.Format (Locale.GetText ("Unknown output format {0}."), outFormat));
}
- public virtual IPermission GetPermission (Type permClass)
+#if NET_2_0
+ public IPermission GetPermission (Type permClass)
+#else
+ public virtual IPermission GetPermission (Type permClass)
+#endif
{
+ if ((permClass == null) || (list.Count == 0))
+ return null;
+
foreach (object o in list) {
- if (o.GetType ().Equals (permClass))
+ if ((o != null) && o.GetType ().Equals (permClass))
return (IPermission) o;
}
+ // it's normal to return null for unrestricted sets
return null;
}
- public virtual PermissionSet Intersect (PermissionSet other)
+#if NET_2_0
+ public PermissionSet Intersect (PermissionSet other)
+#else
+ public virtual PermissionSet Intersect (PermissionSet other)
+#endif
{
// no intersection possible
if ((other == null) || (other.IsEmpty ()) || (this.IsEmpty ()))
- return new PermissionSet (PermissionState.None);
- // intersections with unrestricted
- if (this.IsUnrestricted ())
- return other.Copy ();
- if (other.IsUnrestricted ())
- return this.Copy ();
+ return null;
+
+ PermissionState state = PermissionState.None;
+ if (this.IsUnrestricted () && other.IsUnrestricted ())
+ state = PermissionState.Unrestricted;
- PermissionSet interSet = new PermissionSet (PermissionState.None);
- foreach (IPermission p in other.list) {
+ PermissionSet interSet = null;
+#if NET_2_0
+ // much simpler with 2.0
+ if (state == PermissionState.Unrestricted) {
+ interSet = new PermissionSet (state);
+ } else if (this.IsUnrestricted ()) {
+ interSet = other.Copy ();
+ } else if (other.IsUnrestricted ()) {
+ interSet = this.Copy ();
+ } else {
+ interSet = new PermissionSet (state);
+ InternalIntersect (interSet, this, other, false);
+ }
+#else
+ interSet = new PermissionSet (state);
+ if (state == PermissionState.Unrestricted) {
+ InternalIntersect (interSet, this, other, true);
+ InternalIntersect (interSet, other, this, true);
+ } else if (this.IsUnrestricted ()) {
+ InternalIntersect (interSet, this, other, true);
+ } else if (other.IsUnrestricted ()) {
+ InternalIntersect (interSet, other, this, true);
+ } else {
+ InternalIntersect (interSet, this, other, false);
+ }
+#endif
+ return interSet;
+ }
+
+ internal void InternalIntersect (PermissionSet intersect, PermissionSet a, PermissionSet b, bool unrestricted)
+ {
+ foreach (IPermission p in b.list) {
// for every type in both list
- IPermission i = interSet.GetPermission (p.GetType ());
+ IPermission i = a.GetPermission (p.GetType ());
if (i != null) {
// add intersection for this type
- interSet.AddPermission (p.Intersect (i));
+ intersect.AddPermission (p.Intersect (i));
+ }
+#if NET_2_0
+ // unrestricted is possible for indentity permissions
+ else if (unrestricted) {
+#else
+ else if (unrestricted && (p is IUnrestrictedPermission)) {
+#endif
+ intersect.AddPermission (p);
}
// or reject!
}
- return interSet;
}
- public virtual bool IsEmpty ()
+#if NET_2_0
+ public bool IsEmpty ()
+#else
+ public virtual bool IsEmpty ()
+#endif
{
// note: Unrestricted isn't empty
- return ((state == PermissionState.Unrestricted) ? false : (list.Count == 0));
+ if (state == PermissionState.Unrestricted)
+ return false;
+ if ((list == null) || (list.Count == 0))
+ return true;
+ // the set may include some empty permissions
+ foreach (IPermission p in list) {
+ // empty == fully restricted == IsSubsetOf(null) == true
+ if (!p.IsSubsetOf (null))
+ return false;
+ }
+ return true;
}
- public virtual bool IsUnrestricted ()
+#if NET_2_0
+ public bool IsUnrestricted ()
+#else
+ public virtual bool IsUnrestricted ()
+#endif
{
return (state == PermissionState.Unrestricted);
}
- public virtual IPermission RemovePermission (Type permClass)
+#if NET_2_0
+ public IPermission RemovePermission (Type permClass)
+#else
+ public virtual IPermission RemovePermission (Type permClass)
+#endif
{
+ if ((permClass == null) || _readOnly)
+ return null;
+
foreach (object o in list) {
if (o.GetType ().Equals (permClass)) {
list.Remove (o);
return null;
}
- public virtual IPermission SetPermission (IPermission perm)
+#if NET_2_0
+ public IPermission SetPermission (IPermission perm)
+#else
+ public virtual IPermission SetPermission (IPermission perm)
+#endif
{
+ if ((perm == null) || _readOnly)
+ return perm;
+#if NET_2_0
+ IUnrestrictedPermission u = (perm as IUnrestrictedPermission);
+ if (u == null) {
+ state = PermissionState.None;
+ } else {
+ state = u.IsUnrestricted () ? state : PermissionState.None;
+ }
+#else
if (perm is IUnrestrictedPermission)
state = PermissionState.None;
+#endif
RemovePermission (perm.GetType ());
list.Add (perm);
return perm;
public virtual SecurityElement ToXml ()
{
- SecurityElement se = new SecurityElement ("PermissionSet");
+ SecurityElement se = new SecurityElement (tagName);
se.AddAttribute ("class", GetType ().FullName);
- se.AddAttribute ("version", "1");
+ se.AddAttribute ("version", version.ToString ());
if (state == PermissionState.Unrestricted)
se.AddAttribute ("Unrestricted", "true");
- else {
- foreach (IPermission p in list)
- se.AddChild (p.ToXml ());
+
+ // required for permissions that do not implement IUnrestrictedPermission
+ foreach (IPermission p in list) {
+ se.AddChild (p.ToXml ());
}
return se;
}
+#if NET_2_0
+ public PermissionSet Union (PermissionSet other)
+#else
public virtual PermissionSet Union (PermissionSet other)
+#endif
{
if (other == null)
return this.Copy ();
- if (this.IsUnrestricted () || other.IsUnrestricted ())
+
+ PermissionSet copy = null;
+ if (this.IsUnrestricted () || other.IsUnrestricted ()) {
+#if NET_2_0
+ // there are no child elements in unrestricted permission sets
return new PermissionSet (PermissionState.Unrestricted);
-
- PermissionSet copy = this.Copy ();
- foreach (IPermission p in other.list) {
- copy.AddPermission (p);
+#else
+ copy = this.Copy ();
+ // so we keep the "right" type (e.g. NamedPermissionSet)
+ copy.Clear ();
+ copy.state = PermissionState.Unrestricted;
+ // copy all permissions that do not implement IUnrestrictedPermission
+ foreach (IPermission p in this.list) {
+ if (!(p is IUnrestrictedPermission))
+ copy.AddPermission (p);
+ }
+ foreach (IPermission p in other.list) {
+ if (!(p is IUnrestrictedPermission))
+ copy.AddPermission (p);
+ }
+#endif
+ } else {
+ copy = this.Copy ();
+ // PermissionState.None -> copy all permissions
+ foreach (IPermission p in other.list) {
+ copy.AddPermission (p);
+ }
}
return copy;
}
}
public virtual bool IsReadOnly {
- get { return false; } // always false
+ // always false (as documented) but the PermissionSet can be read-only
+ // e.g. in a PolicyStatement
+ get { return false; }
}
public virtual object SyncRoot {
- get { return list.SyncRoot; }
+ get { return this; }
}
- [MonoTODO()]
+ internal bool DeclarativeSecurity {
+ get { return _declsec; }
+ set { _declsec = value; }
+ }
+
+ [MonoTODO ("may not be required")]
void IDeserializationCallback.OnDeserialization (object sender)
{
}
+
+#if NET_2_0
+ [ComVisible (false)]
+ public override bool Equals (object obj)
+ {
+ if (obj == null)
+ return false;
+ PermissionSet ps = (obj as PermissionSet);
+ if (ps == null)
+ return false;
+ if (state != ps.state)
+ return false;
+ if (list.Count != ps.Count)
+ return false;
+
+ for (int i=0; i < list.Count; i++) {
+ bool found = false;
+ for (int j=0; i < ps.list.Count; j++) {
+ if (list [i].Equals (ps.list [j])) {
+ found = true;
+ break;
+ }
+ }
+ if (!found)
+ return false;
+ }
+ return true;
+ }
+
+ [ComVisible (false)]
+ public override int GetHashCode ()
+ {
+ return (list.Count == 0) ? (int) state : base.GetHashCode ();
+ }
+
+ // FIXME what's it doing here? There's probably a reason this was added here.
+ static public void RevertAssert ()
+ {
+ CodeAccessPermission.RevertAssert ();
+ }
+#endif
+
+ // internal
+
+ internal PolicyLevel Resolver {
+ get { return _policyLevel; }
+ set { _policyLevel = value; }
+ }
+
+ internal void SetReadOnly (bool value)
+ {
+ _readOnly = value;
+ }
+
+ private bool AllIgnored ()
+ {
+ if (_ignored == null)
+ throw new NotSupportedException ("bad bad bad");
+
+ for (int i=0; i < _ignored.Length; i++) {
+ if (!_ignored [i])
+ return false;
+ }
+ // everything is ignored (i.e. non-CAS permission or asserted permission).
+ return true;
+ }
+
+ internal bool ProcessFrame (SecurityFrame frame, ref Assembly current, ref AppDomain domain)
+ {
+ if (IsUnrestricted ()) {
+ // we request unrestricted
+ if (frame.Deny != null) {
+ // but have restrictions (some denied permissions)
+ CodeAccessPermission.ThrowSecurityException (this, "Deny", frame, SecurityAction.Demand, null);
+ } else if ((frame.PermitOnly != null) && !frame.PermitOnly.IsUnrestricted ()) {
+ // but have restrictions (only some permitted permissions)
+ CodeAccessPermission.ThrowSecurityException (this, "PermitOnly", frame, SecurityAction.Demand, null);
+ }
+ }
+
+ // skip next steps if no Assert, Deny or PermitOnly are present
+ if (frame.HasStackModifiers) {
+ for (int i = 0; i < list.Count; i++) {
+ CodeAccessPermission cap = (CodeAccessPermission) list [i];
+ if (cap.ProcessFrame (frame)) {
+ _ignored [i] = true; // asserted
+ if (AllIgnored ())
+ return true; // no more, abort stack walk!
+ }
+ }
+ }
+
+ // however the "final" grant set is resolved by assembly, so
+ // there's no need to check it every time (just when we're
+ // changing assemblies between frames).
+ if (frame.Assembly != current) {
+ CheckAssembly (current, frame);
+ current = frame.Assembly;
+ }
+
+ if (frame.Domain != domain) {
+ CheckAppDomain (domain, frame);
+ domain = frame.Domain;
+ }
+
+ return false;
+ }
+
+ internal void CheckAssembly (Assembly a, SecurityFrame frame)
+ {
+ IPermission p = SecurityManager.CheckPermissionSet (a, this, false);
+ if (p != null) {
+ CodeAccessPermission.ThrowSecurityException (this, "Demand failed assembly permissions checks.",
+ frame, SecurityAction.Demand, p);
+ }
+ }
+
+ internal void CheckAppDomain (AppDomain domain, SecurityFrame frame)
+ {
+ IPermission p = SecurityManager.CheckPermissionSet (domain, this);
+ if (p != null) {
+ CodeAccessPermission.ThrowSecurityException (this, "Demand failed appdomain permissions checks.",
+ frame, SecurityAction.Demand, p);
+ }
+ }
+
+ // 2.0 metadata format
+
+ internal static PermissionSet CreateFromBinaryFormat (byte[] data)
+ {
+ if ((data == null) || (data [0] != 0x2E) || (data.Length < 2)) {
+ string msg = Locale.GetText ("Invalid data in 2.0 metadata format.");
+ throw new SecurityException (msg);
+ }
+
+ int pos = 1;
+ int numattr = ReadEncodedInt (data, ref pos);
+ PermissionSet ps = new PermissionSet (PermissionState.None);
+ for (int i = 0; i < numattr; i++) {
+ IPermission p = ProcessAttribute (data, ref pos);
+ if (p == null) {
+ string msg = Locale.GetText ("Unsupported data found in 2.0 metadata format.");
+ throw new SecurityException (msg);
+ }
+ ps.AddPermission (p);
+ }
+ return ps;
+ }
+
+ internal static int ReadEncodedInt (byte[] data, ref int position)
+ {
+ int len = 0;
+ if ((data [position] & 0x80) == 0) {
+ len = data [position];
+ position ++;
+ } else if ((data [position] & 0x40) == 0) {
+ len = ((data [position] & 0x3f) << 8 | data [position + 1]);
+ position += 2;
+ } else {
+ len = (((data [position] & 0x1f) << 24) | (data [position + 1] << 16) |
+ (data [position + 2] << 8) | (data [position + 3]));
+ position += 4;
+ }
+ return len;
+ }
+
+ static object[] action = new object [1] { (SecurityAction) 0 };
+
+ // TODO: add support for arrays and enums (2.0)
+ internal static IPermission ProcessAttribute (byte[] data, ref int position)
+ {
+ int clen = ReadEncodedInt (data, ref position);
+ string cnam = Encoding.UTF8.GetString (data, position, clen);
+ position += clen;
+
+ Type secattr = Type.GetType (cnam);
+ SecurityAttribute sa = (Activator.CreateInstance (secattr, action) as SecurityAttribute);
+ if (sa == null)
+ return null;
+
+ /*int optionalParametersLength =*/ ReadEncodedInt (data, ref position);
+ int numberOfParameters = ReadEncodedInt (data, ref position);
+ for (int j=0; j < numberOfParameters; j++) {
+ bool property = false;
+ switch (data [position++]) {
+ case 0x53: // field (technically possible and working)
+ property = false;
+ break;
+ case 0x54: // property (common case)
+ property = true;
+ break;
+ default:
+ return null;
+ }
+
+ bool array = false;
+ byte type = data [position++];
+ if (type == 0x1D) {
+ array = true;
+ type = data [position++];
+ }
+
+ int plen = ReadEncodedInt (data, ref position);
+ string pnam = Encoding.UTF8.GetString (data, position, plen);
+ position += plen;
+
+ int arrayLength = 1;
+ if (array) {
+ arrayLength = BitConverter.ToInt32 (data, position);
+ position += 4;
+ }
+
+ object obj = null;
+ object[] arrayIndex = null;
+ for (int i = 0; i < arrayLength; i++) {
+ if (array) {
+ // TODO - setup index (2.0)
+ }
+
+ // sadly type values doesn't match ther TypeCode enum :(
+ switch (type) {
+ case 0x02: // MONO_TYPE_BOOLEAN
+ obj = (object) Convert.ToBoolean (data [position++]);
+ break;
+ case 0x03: // MONO_TYPE_CHAR
+ obj = (object) Convert.ToChar (data [position]);
+ position += 2;
+ break;
+ case 0x04: // MONO_TYPE_I1
+ obj = (object) Convert.ToSByte (data [position++]);
+ break;
+ case 0x05: // MONO_TYPE_U1
+ obj = (object) Convert.ToByte (data [position++]);
+ break;
+ case 0x06: // MONO_TYPE_I2
+ obj = (object) Convert.ToInt16 (data [position]);
+ position += 2;
+ break;
+ case 0x07: // MONO_TYPE_U2
+ obj = (object) Convert.ToUInt16 (data [position]);
+ position += 2;
+ break;
+ case 0x08: // MONO_TYPE_I4
+ obj = (object) Convert.ToInt32 (data [position]);
+ position += 4;
+ break;
+ case 0x09: // MONO_TYPE_U4
+ obj = (object) Convert.ToUInt32 (data [position]);
+ position += 4;
+ break;
+ case 0x0A: // MONO_TYPE_I8
+ obj = (object) Convert.ToInt64 (data [position]);
+ position += 8;
+ break;
+ case 0x0B: // MONO_TYPE_U8
+ obj = (object) Convert.ToUInt64 (data [position]);
+ position += 8;
+ break;
+ case 0x0C: // MONO_TYPE_R4
+ obj = (object) Convert.ToSingle (data [position]);
+ position += 4;
+ break;
+ case 0x0D: // MONO_TYPE_R8
+ obj = (object) Convert.ToDouble (data [position]);
+ position += 8;
+ break;
+ case 0x0E: // MONO_TYPE_STRING
+ string s = null;
+ if (data [position] != 0xFF) {
+ int slen = ReadEncodedInt (data, ref position);
+ s = Encoding.UTF8.GetString (data, position, slen);
+ position += slen;
+ } else {
+ position++;
+ }
+ obj = (object) s;
+ break;
+ case 0x50: // special for TYPE
+ int tlen = ReadEncodedInt (data, ref position);
+ obj = (object) Type.GetType (Encoding.UTF8.GetString (data, position, tlen));
+ position += tlen;
+ break;
+ default:
+ return null; // unsupported
+ }
+
+ if (property) {
+ PropertyInfo pi = secattr.GetProperty (pnam);
+ pi.SetValue (sa, obj, arrayIndex);
+ } else {
+ FieldInfo fi = secattr.GetField (pnam);
+ fi.SetValue (sa, obj);
+ }
+ }
+ }
+ return sa.CreatePermission ();
+ }
}
}
projects / mono.git / blobdiff