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                 // properties
  64
  65                 public string Name {
  66
  67                         get { return name; }
  68
  69                         set { name = value; }
  70                 }
  71
  72                 public Version Version {
  73
  74                         get { return version; }
  75
  76                         set { version = value; }
  77                 }
  78
  79                 public StrongNamePublicKeyBlob PublicKey {
  80
  81                         get { return blob; }
  82
  83                         set {
  84                                 if (value == null)
  85                                         throw new ArgumentNullException (
  86                                                 Locale.GetText ("The argument is null."));
  87
  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                                         if (sn.PublicKey.Equals (blob) && (sn.Name == name) && (sn.Version.Equals (version)))
 101                                                 return true;
 102                                 }
 103                         }
 104                         return false;
 105                 }
 106
 107                 public IMembershipCondition Copy ()
 108                 {
 109                         return new StrongNameMembershipCondition (blob, name, version);
 110                 }
 111
 112                 public override bool Equals (object o)
 113                 {
 114                         if (o is StrongNameMembershipCondition == false)
 115                                 return false;
 116                         else {
 117                                 StrongNameMembershipCondition snmc = (StrongNameMembershipCondition) o;
 118                                 return (snmc.Name == Name && snmc.Version == Version && snmc.PublicKey == PublicKey);
 119                         }
 120                 }
 121
 122                 public override int GetHashCode ()
 123                 {
 124                         return blob.GetHashCode ();
 125                 }
 126
 127                 public void FromXml (SecurityElement e)
 128                 {
 129                         FromXml (e, null);
 130                 }
 131
 132                 public void FromXml (SecurityElement e, PolicyLevel level)
 133                 {
 134                         if (e == null)
 135                                 throw new ArgumentNullException ("e");
 136
 137                         if (e.Attribute ("class").IndexOf (GetType ().Name) < 0)
 138                                 throw new ArgumentException (Locale.GetText ("Invalid class"));
 139
 140                         if (e.Attribute ("version") != "1")
 141                                 throw new ArgumentException (Locale.GetText ("Invalid version"));
 142
 143                         blob = StrongNamePublicKeyBlob.FromString (e.Attribute ("PublicKeyBlob"));
 144                         name = e.Attribute ("Name");
 145                         string v = (string) e.Attribute ("AssemblyVersion");
 146                         if (v == null)
 147                                 version = new Version ();
 148                         else
 149                                 version = new Version (v);
 150                 }
 151
 152                 public override string ToString ()
 153                 {
 154                         return String.Format ( "Strong Name - {0} name = {1} version {2}",
 155                                         blob, name, version);
 156                 }
 157
 158                 public SecurityElement ToXml ()
 159                 {
 160                         return ToXml (null);
 161                 }
 162
 163                 public SecurityElement ToXml (PolicyLevel level)
 164                 {
 165                         SecurityElement element = new SecurityElement ("IMembershipCondition");
 166                         element.AddAttribute ("class", this.GetType ().AssemblyQualifiedName);
 167                         element.AddAttribute ("version", "1");
 168
 169                         element.AddAttribute ("PublicKeyBlob", blob.ToString ());
 170                         element.AddAttribute ("Name", name);
 171                         string v = version.ToString ();
 172                         if (v != "0.0")
 173                                 element.AddAttribute ("AssemblyVersion", version.ToString ());
 174
 175                         return element;
 176                 }
 177         }
 178 }