mcs/class/corlib/System.Security/PermissionSetCollection.cs

   1 //
   2 // System.Security.PermissionSetCollection class
   3 //
   4 // Authors
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System.Collections;
  32 using System.Runtime.InteropServices;
  33 using System.Security.Permissions;
  34
  35 namespace System.Security {
  36
  37         [Serializable]
  38         [ComVisible (true)]
  39         [Obsolete ("seems the *Choice actions won't survive")]
  40         public sealed class PermissionSetCollection : ICollection, IEnumerable {
  41
  42                 private static string tagName = "PermissionSetCollection";
  43                 private IList _list;
  44
  45                 public PermissionSetCollection ()
  46                 {
  47                         _list = (IList) new ArrayList ();
  48                 }
  49
  50                 // properties
  51
  52                 public int Count {
  53                         get { return _list.Count; }
  54                 }
  55
  56                 public bool IsSynchronized {
  57                         get { return false; }
  58                 }
  59
  60                 public IList PermissionSets {
  61                         get { return _list; }
  62                 }
  63
  64                 public object SyncRoot {
  65                         // this is the "real thing"
  66                         get { throw new NotSupportedException (); }
  67                 }
  68
  69                 // methods
  70
  71                 public void Add (PermissionSet permSet)
  72                 {
  73                         if (permSet == null)
  74                                 throw new ArgumentNullException ("permSet");
  75                         _list.Add (permSet);
  76                 }
  77
  78                 public PermissionSetCollection Copy ()
  79                 {
  80                         PermissionSetCollection psc = new PermissionSetCollection ();
  81                         foreach (PermissionSet ps in _list) {
  82                                 psc._list.Add (ps.Copy ());
  83                         }
  84                         return psc;
  85                 }
  86
  87                 public void CopyTo (PermissionSet[] array, int index)
  88                 {
  89                         // this is the "real thing"
  90                         throw new NotSupportedException ();
  91                 }
  92
  93                 void ICollection.CopyTo (Array array, int index)
  94                 {
  95                         // this is the "real thing"
  96                         throw new NotSupportedException ();
  97                 }
  98
  99                 public void Demand ()
 100                 {
 101                         // check all collection in a single stack walk
 102                         PermissionSet superset = new PermissionSet (PermissionState.None);
 103                         foreach (PermissionSet ps in _list) {
 104                                 foreach (IPermission p in ps) {
 105                                         superset.AddPermission (p);
 106                                 }
 107                         }
 108                         superset.Demand ();
 109                 }
 110
 111                 public void FromXml (SecurityElement el)
 112                 {
 113                         if (el == null)
 114                                 throw new ArgumentNullException ("el");
 115                         if (el.Tag != tagName) {
 116                                 string msg = String.Format ("Invalid tag {0} expected {1}", el.Tag, tagName);
 117                                 throw new ArgumentException (msg, "el");
 118                         }
 119                         _list.Clear ();
 120                         if (el.Children != null) {
 121                                 foreach (SecurityElement child in el.Children) {
 122                                         PermissionSet ps = new PermissionSet (PermissionState.None);
 123                                         ps.FromXml (child);
 124                                         _list.Add (ps);
 125                                 }
 126                         }
 127                 }
 128
 129                 public IEnumerator GetEnumerator ()
 130                 {
 131                         return _list.GetEnumerator ();
 132                 }
 133
 134                 public PermissionSet GetSet (int index)
 135                 {
 136                         if ((index < 0) || (index >= _list.Count))
 137                                 throw new ArgumentOutOfRangeException ("index");
 138
 139                         return (PermissionSet) _list [index];
 140                 }
 141
 142                 public void RemoveSet (int index)
 143                 {
 144                         if ((index < 0) || (index >= _list.Count))
 145                                 throw new ArgumentOutOfRangeException ("index");
 146
 147                         _list.RemoveAt (index);
 148                 }
 149
 150                 public override string ToString ()
 151                 {
 152                         return ToXml ().ToString ();
 153                 }
 154
 155                 public SecurityElement ToXml ()
 156                 {
 157                         SecurityElement se = new SecurityElement (tagName);
 158                         foreach (PermissionSet ps in _list) {
 159                                 se.AddChild (ps.ToXml ());
 160                         }
 161                         return se;
 162                 }
 163
 164                 // internal stuff
 165
 166                 internal void DemandChoice ()
 167                 {
 168                         SecurityException exception = null;
 169                         bool result = false;
 170                         foreach (PermissionSet pset in _list) {
 171                                 try {
 172                                         pset.Demand ();
 173                                         result = true;
 174                                         break;
 175                                 }
 176                                 catch (SecurityException se) {
 177                                         // keep the first failure, we may throw it if we not succeed
 178                                         if (exception == null)
 179                                                 exception = se;
 180                                 }
 181                         }
 182
 183                         if (!result) {
 184                                 if (exception != null)
 185                                         throw exception;
 186                                 else
 187                                         throw new SecurityException ("DemandChoice failed.");
 188                         }
 189                 }
 190
 191                 // 2.0 metadata format
 192
 193                 internal static PermissionSetCollection CreateFromBinaryFormat (byte[] data)
 194                 {
 195                         if ((data == null) || (data [0] != 0x2E) || (data.Length < 2)) {
 196                                 string msg = Locale.GetText ("Invalid data in 2.0 metadata format.");
 197                                 throw new SecurityException (msg);
 198                         }
 199
 200                         int pos = 1;
 201                         int numattr = PermissionSet.ReadEncodedInt (data, ref pos);
 202                         PermissionSetCollection psc = new PermissionSetCollection ();
 203                         for (int i = 0; i < numattr; i++) {
 204                                 IPermission p = PermissionSet.ProcessAttribute (data, ref pos);
 205                                 if (p == null) {
 206                                         string msg = Locale.GetText ("Unsupported data found in 2.0 metadata format.");
 207                                         throw new SecurityException (msg);
 208                                 }
 209
 210                                 PermissionSet ps = new PermissionSet (PermissionState.None);
 211                                 ps.DeclarativeSecurity = true;
 212                                 ps.AddPermission (p);
 213                                 psc.Add (ps);
 214                         }
 215                         return psc;
 216                 }
 217         }
 218 }
 219
 220 #endif