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

   1 //
   2 // System.Security.Policy.StrongNameMembershipCondition.cs
   3 //
   4 // Author:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //
   7 // (C) 2003 Duncan Mak, Ximian Inc.
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Globalization;
  35 using System.Security.Permissions;
  36
  37 namespace System.Security.Policy {
  38
  39         [Serializable]
  40         public sealed class StrongNameMembershipCondition
  41                 : IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable, IConstantMembershipCondition
  42         {
  43                 StrongNamePublicKeyBlob blob;
  44                 string name;
  45                 Version version;
  46
  47                 public StrongNameMembershipCondition (StrongNamePublicKeyBlob blob, string name, Version version)
  48                 {
  49                         if (blob == null)
  50                                 throw new ArgumentNullException ("blob");
  51
  52                         this.blob = blob;
  53                         this.name = name;
  54                         this.version = version;
  55                 }
  56
  57                 // for PolicyLevel (to avoid validation duplication)
  58                 internal StrongNameMembershipCondition (SecurityElement e)
  59                 {
  60                         FromXml (e);
  61                 }
  62
  63                 // so System.Activator.CreateInstance can create an instance...
  64                 internal StrongNameMembershipCondition ()
  65                 {
  66                 }
  67
  68                 // properties
  69
  70                 public string Name {
  71
  72                         get { return name; }
  73
  74                         set { name = value; }
  75                 }
  76
  77                 public Version Version {
  78
  79                         get { return version; }
  80
  81                         set { version = value; }
  82                 }
  83
  84                 public StrongNamePublicKeyBlob PublicKey {
  85
  86                         get { return blob; }
  87
  88                         set {
  89                                 if (value == null)
  90                                         throw new ArgumentNullException (
  91                                                 Locale.GetText ("The argument is null."));
  92
  93                                 blob = value;
  94                         }
  95                 }
  96
  97                 public bool Check (Evidence evidence)
  98                 {
  99                         if (evidence == null)
 100                                 return false;
 101
 102                         foreach (object o in evidence) {
 103                                 if (o is StrongName) {
 104                                         StrongName sn = (o as StrongName);
 105                                         if (sn.PublicKey.Equals (blob) && (sn.Name == name) && (sn.Version.Equals (version)))
 106                                                 return true;
 107                                 }
 108                         }
 109                         return false;
 110                 }
 111
 112                 public IMembershipCondition Copy ()
 113                 {
 114                         return new StrongNameMembershipCondition (blob, name, version);
 115                 }
 116
 117                 public override bool Equals (object o)
 118                 {
 119                         if (o is StrongNameMembershipCondition == false)
 120                                 return false;
 121                         else {
 122                                 StrongNameMembershipCondition snmc = (StrongNameMembershipCondition) o;
 123                                 return (snmc.Name == Name && snmc.Version == Version && snmc.PublicKey == PublicKey);
 124                         }
 125                 }
 126
 127                 public override int GetHashCode ()
 128                 {
 129                         return blob.GetHashCode ();
 130                 }
 131
 132                 public void FromXml (SecurityElement e)
 133                 {
 134                         FromXml (e, null);
 135                 }
 136
 137                 public void FromXml (SecurityElement e, PolicyLevel level)
 138                 {
 139                         if (e == null)
 140                                 throw new ArgumentNullException ("e");
 141
 142                         if (e.Attribute ("class").IndexOf (GetType ().Name) < 0)
 143                                 throw new ArgumentException (Locale.GetText ("Invalid class"));
 144
 145                         if (e.Attribute ("version") != "1")
 146                                 throw new ArgumentException (Locale.GetText ("Invalid version"));
 147
 148                         blob = StrongNamePublicKeyBlob.FromString (e.Attribute ("PublicKeyBlob"));
 149                         name = e.Attribute ("Name");
 150                         string v = (string) e.Attribute ("AssemblyVersion");
 151                         if (v == null)
 152                                 version = new Version ();
 153                         else
 154                                 version = new Version (v);
 155                 }
 156
 157                 public override string ToString ()
 158                 {
 159                         return String.Format ( "Strong Name - {0} name = {1} version {2}",
 160                                         blob, name, version);
 161                 }
 162
 163                 public SecurityElement ToXml ()
 164                 {
 165                         return ToXml (null);
 166                 }
 167
 168                 public SecurityElement ToXml (PolicyLevel level)
 169                 {
 170                         SecurityElement element = new SecurityElement ("IMembershipCondition");
 171                         element.AddAttribute ("class", this.GetType ().AssemblyQualifiedName);
 172                         element.AddAttribute ("version", "1");
 173
 174                         element.AddAttribute ("PublicKeyBlob", blob.ToString ());
 175                         element.AddAttribute ("Name", name);
 176                         string v = version.ToString ();
 177                         if (v != "0.0")
 178                                 element.AddAttribute ("AssemblyVersion", version.ToString ());
 179
 180                         return element;
 181                 }
 182         }
 183 }