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 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Duncan Mak, Ximian Inc.
   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.Globalization;
  32 using System.Security.Permissions;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Security.Policy {
  36
  37         [Serializable]
  38 #if NET_2_0
  39         [ComVisible (true)]
  40 #endif
  41         public sealed class StrongNameMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  42
  43                 private readonly int version = 1;
  44
  45                 private StrongNamePublicKeyBlob blob;
  46                 private string name;
  47                 private Version assemblyVersion;
  48
  49                 public StrongNameMembershipCondition (StrongNamePublicKeyBlob blob, string name, Version version)
  50                 {
  51                         if (blob == null)
  52                                 throw new ArgumentNullException ("blob");
  53
  54                         this.blob = blob;
  55                         this.name = name;
  56                         assemblyVersion = version;
  57                 }
  58
  59                 // for PolicyLevel (to avoid validation duplication)
  60                 internal StrongNameMembershipCondition (SecurityElement e)
  61                 {
  62                         FromXml (e);
  63                 }
  64
  65                 // so System.Activator.CreateInstance can create an instance...
  66                 internal StrongNameMembershipCondition ()
  67                 {
  68                 }
  69
  70                 // properties
  71
  72                 public string Name {
  73                         get { return name; }
  74                         set { name = value; }
  75                 }
  76
  77                 public Version Version {
  78                         get { return assemblyVersion; }
  79                         set { assemblyVersion = value; }
  80                 }
  81
  82                 public StrongNamePublicKeyBlob PublicKey {
  83                         get { return blob; }
  84                         set {
  85                                 if (value == null)
  86                                         throw new ArgumentNullException (
  87                                                 Locale.GetText ("The argument is null."));
  88                                 blob = value;
  89                         }
  90                 }
  91
  92                 public bool Check (Evidence evidence)
  93                 {
  94                         if (evidence == null)
  95                                 return false;
  96
  97                         foreach (object o in evidence) {
  98                                 if (o is StrongName) {
  99                                         StrongName sn = (o as StrongName);
 100                                         /* ??? partial match ??? */
 101                                         if (sn.PublicKey.Equals (blob) && (sn.Name == name) && (sn.Version.Equals (assemblyVersion)))
 102                                                 return true;
 103                                 }
 104                         }
 105                         return false;
 106                 }
 107
 108                 public IMembershipCondition Copy ()
 109                 {
 110                         return new StrongNameMembershipCondition (blob, name, assemblyVersion);
 111                 }
 112
 113                 public override bool Equals (object o)
 114                 {
 115                         if (o is StrongNameMembershipCondition == false)
 116                                 return false;
 117                         else {
 118                                 StrongNameMembershipCondition snmc = (StrongNameMembershipCondition) o;
 119                                 return (snmc.Name == Name && snmc.Version == Version && snmc.PublicKey == PublicKey);
 120                         }
 121                 }
 122
 123                 public override int GetHashCode ()
 124                 {
 125                         return blob.GetHashCode ();
 126                 }
 127
 128                 public void FromXml (SecurityElement e)
 129                 {
 130                         FromXml (e, null);
 131                 }
 132
 133                 public void FromXml (SecurityElement e, PolicyLevel level)
 134                 {
 135                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 136
 137                         blob = StrongNamePublicKeyBlob.FromString (e.Attribute ("PublicKeyBlob"));
 138                         name = e.Attribute ("Name");
 139                         string v = (string) e.Attribute ("AssemblyVersion");
 140                         if (v == null)
 141                                 assemblyVersion = new Version ();
 142                         else
 143                                 assemblyVersion = new Version (v);
 144                 }
 145
 146                 public override string ToString ()
 147                 {
 148                         // ??? missing informations ???
 149                         return String.Format ( "Strong Name - {0} name = {1} version {2}",
 150                                         blob, name, assemblyVersion);
 151                 }
 152
 153                 public SecurityElement ToXml ()
 154                 {
 155                         return ToXml (null);
 156                 }
 157
 158                 public SecurityElement ToXml (PolicyLevel level)
 159                 {
 160                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 161                         SecurityElement se = MembershipConditionHelper.Element (typeof (StrongNameMembershipCondition), version);
 162
 163                         if (blob != null)
 164                                 se.AddAttribute ("PublicKeyBlob", blob.ToString ());
 165                         if (name != null)
 166                                 se.AddAttribute ("Name", name);
 167                         if (assemblyVersion != null) {
 168                                 string v = assemblyVersion.ToString ();
 169                                 if (v != "0.0")
 170                                         se.AddAttribute ("AssemblyVersion", v);
 171                         }
 172                         return se;
 173                 }
 174         }
 175 }