mcs/class/corlib/System.Security.Policy/NetCodeGroup.cs

   1 //
   2 // System.Security.Policy.NetCodeGroup.cs
   3 //
   4 // Authors:
   5 //      Jackson Harper (Jackson@LatitudeGeo.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2002 Jackson Harper, All rights reserved
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections;
  32 using System.Globalization;
  33 using System.Runtime.InteropServices;
  34 using System.Security.Permissions;
  35
  36 namespace System.Security.Policy {
  37
  38         [Serializable]
  39         [ComVisible (true)]
  40         public sealed class NetCodeGroup : CodeGroup {
  41
  42                 public static readonly string AbsentOriginScheme = String.Empty;
  43                 public static readonly string AnyOtherOriginScheme = "*";
  44
  45                 private Hashtable _rules = new Hashtable ();
  46                 private int _hashcode;
  47
  48                 public NetCodeGroup (IMembershipCondition membershipCondition)
  49                         : base (membershipCondition, null)
  50                 {
  51                 }
  52
  53                 // for PolicyLevel (to avoid validation duplication)
  54                 internal NetCodeGroup (SecurityElement e, PolicyLevel level)
  55                         : base (e, level)
  56                 {
  57                 }
  58
  59                 //
  60                 // Public Properties
  61                 //
  62
  63                 public override string AttributeString {
  64                         get { return null; }
  65                 }
  66
  67                 public override string MergeLogic {
  68                         get { return "Union"; }
  69                 }
  70
  71                 public override string PermissionSetName {
  72                         get { return "Same site Web"; }
  73                 }
  74
  75
  76                 //
  77                 // Public Methods
  78                 //
  79
  80                 [MonoTODO ("(2.0) missing validations")]
  81                 public void AddConnectAccess (string originScheme, CodeConnectAccess connectAccess)
  82                 {
  83                         if (originScheme == null)
  84                                 throw new ArgumentException ("originScheme");
  85
  86                         // TODO (2.0) - invalid characters in originScheme
  87                         if ((originScheme == AbsentOriginScheme) && (connectAccess.Scheme == CodeConnectAccess.OriginScheme)) {
  88                                 throw new ArgumentOutOfRangeException ("connectAccess", Locale.GetText (
  89                                         "Schema == CodeConnectAccess.OriginScheme"));
  90                         }
  91
  92                         if (_rules.ContainsKey (originScheme)) {
  93                                 // NULL has no effect
  94                                 if (connectAccess != null) {
  95                                         CodeConnectAccess[] existing = (CodeConnectAccess[]) _rules [originScheme];
  96                                         CodeConnectAccess[] array = new CodeConnectAccess [existing.Length + 1];
  97                                         Array.Copy (existing, 0, array, 0, existing.Length);
  98                                         array [existing.Length] = connectAccess;
  99                                         _rules [originScheme] = array;
 100                                 }
 101                         }
 102                         else {
 103                                 CodeConnectAccess[] array = new CodeConnectAccess [1];
 104                                 array [0] = connectAccess;
 105                                 _rules.Add (originScheme, array);
 106                                 // add null to prevent access
 107                         }
 108                 }
 109
 110                 public override CodeGroup Copy ()
 111                 {
 112                         NetCodeGroup copy = new NetCodeGroup (MembershipCondition);
 113                         copy.Name = Name;
 114                         copy.Description = Description;
 115                         copy.PolicyStatement = PolicyStatement;
 116
 117                         foreach (CodeGroup child in Children) {
 118                                 copy.AddChild (child.Copy ());  // deep copy
 119                         }
 120                         return copy;
 121                 }
 122
 123                 private bool Equals (CodeConnectAccess[] rules1, CodeConnectAccess[] rules2)
 124                 {
 125                         for (int i=0; i < rules1.Length; i++) {
 126                                 bool found = false;
 127                                 for (int j=0; j < rules2.Length; j++) {
 128                                         if (rules1 [i].Equals (rules2 [j])) {
 129                                                 found = true;
 130                                                 break;
 131                                         }
 132                                 }
 133                                 if (!found)
 134                                         return false;
 135                         }
 136                         return true;
 137                 }
 138
 139                 public override bool Equals (object o)
 140                 {
 141                         if (!base.Equals (o))
 142                                 return false;
 143                         NetCodeGroup ncg = (o as NetCodeGroup);
 144                         if (ncg == null)
 145                                 return false;
 146
 147                         // check rules
 148                         foreach (DictionaryEntry de in _rules) {
 149                                 bool found = false;
 150                                 CodeConnectAccess[] ccas = (CodeConnectAccess[]) ncg._rules [de.Key];
 151                                 if (ccas != null)
 152                                         found = Equals ((CodeConnectAccess[]) de.Value, ccas);
 153                                 else
 154                                         found = (de.Value == null);
 155
 156                                 if (!found)
 157                                         return false;
 158                         }
 159                         return true;
 160                 }
 161
 162                 public DictionaryEntry[] GetConnectAccessRules ()
 163                 {
 164                         DictionaryEntry[] result = new DictionaryEntry [_rules.Count];
 165                         _rules.CopyTo (result, 0);
 166                         return result;
 167                 }
 168
 169                 public override int GetHashCode ()
 170                 {
 171                         if (_hashcode == 0) {
 172                                 _hashcode = base.GetHashCode ();
 173                                 foreach (DictionaryEntry de in _rules) {
 174                                         CodeConnectAccess[] ccas = (CodeConnectAccess[]) de.Value;
 175                                         if (ccas != null) {
 176                                                 foreach (CodeConnectAccess cca in ccas) {
 177                                                         _hashcode ^= cca.GetHashCode ();
 178                                                 }
 179                                         }
 180                                 }
 181                         }
 182                         return _hashcode;
 183                 }
 184
 185                 public override PolicyStatement Resolve (Evidence evidence)
 186                 {
 187                         if (evidence == null)
 188                                 throw new ArgumentNullException ("evidence");
 189
 190                         if (!MembershipCondition.Check (evidence))
 191                                 return null;
 192
 193                         PermissionSet ps = null;
 194                         if (this.PolicyStatement == null)
 195                                 ps = new PermissionSet (PermissionState.None);
 196                         else
 197                                 ps = this.PolicyStatement.PermissionSet.Copy ();
 198
 199                         if (this.Children.Count > 0) {
 200                                 foreach (CodeGroup child_cg in this.Children) {
 201                                         PolicyStatement child_pst = child_cg.Resolve (evidence);
 202                                         if (child_pst != null) {
 203                                                 ps = ps.Union (child_pst.PermissionSet);
 204                                         }
 205                                 }
 206                         }
 207
 208                         PolicyStatement pst = this.PolicyStatement.Copy ();
 209                         pst.PermissionSet = ps;
 210                         return pst;
 211                 }
 212
 213                 public void ResetConnectAccess ()
 214                 {
 215                         _rules.Clear ();
 216                 }
 217
 218                 public override CodeGroup ResolveMatchingCodeGroups (Evidence evidence)
 219                 {
 220                         if (evidence == null)
 221                                 throw new ArgumentNullException ("evidence");
 222
 223                         CodeGroup return_group = null;
 224                         if (MembershipCondition.Check (evidence)) {
 225                                 return_group = Copy ();
 226
 227                                 foreach (CodeGroup child_group in Children) {
 228                                         CodeGroup matching =
 229                                                 child_group.ResolveMatchingCodeGroups (evidence);
 230                                         if (matching == null)
 231                                                 continue;
 232                                         return_group.AddChild (matching);
 233                                 }
 234                         }
 235
 236                         return return_group;
 237                 }
 238
 239                 [MonoTODO ("(2.0) Add new stuff (CodeConnectAccess) into XML")]
 240                 protected override void CreateXml (SecurityElement element, PolicyLevel level)
 241                 {
 242                         base.CreateXml (element, level);
 243                 }
 244
 245                 [MonoTODO ("(2.0) Parse new stuff (CodeConnectAccess) from XML")]
 246                 protected override void ParseXml (SecurityElement e, PolicyLevel level)
 247                 {
 248                         base.ParseXml (e, level);
 249                 }
 250         }
 251 }