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

   1 //
   2 // PublisherMembershipCondition.cs: Publisher Membership Condition
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Collections;
  31 using System.Security.Cryptography.X509Certificates;
  32
  33 using Mono.Security.Cryptography;
  34
  35 namespace System.Security.Policy {
  36
  37         [Serializable]
  38         public sealed class PublisherMembershipCondition : IConstantMembershipCondition, IMembershipCondition {
  39
  40                 private readonly int version = 1;
  41
  42                 private X509Certificate x509;
  43
  44                 // so System.Activator.CreateInstance can create an instance...
  45                 internal PublisherMembershipCondition ()
  46                 {
  47                 }
  48
  49                 // LAMESPEC: Undocumented ArgumentNullException exception
  50                 public PublisherMembershipCondition (X509Certificate certificate)
  51                 {
  52                         if (certificate == null)
  53                                 throw new ArgumentNullException ("certificate");
  54                         // needed to match MS implementation
  55                         if (certificate.GetRawCertData () == null)
  56                                 throw new NullReferenceException ("certificate");
  57                         x509 = certificate;
  58                 }
  59
  60                 // LAMESPEC: Undocumented ArgumentNullException exception
  61                 public X509Certificate Certificate {
  62                         get { return x509; }
  63                         set {
  64                                 if (value == null)
  65                                         throw new ArgumentNullException ("value");
  66                                 x509 = value;
  67                         }
  68                 }
  69
  70                 public bool Check (Evidence evidence)
  71                 {
  72                         if (evidence == null)
  73                                 return false;
  74
  75                         IEnumerator e = evidence.GetHostEnumerator ();
  76                         while (e.MoveNext ()) {
  77                                 if (e.Current is Publisher) {
  78                                         if (x509.Equals ((e.Current as Publisher).Certificate))
  79                                                 return true;
  80                                 }
  81                         }
  82                         return false;
  83                 }
  84
  85                 public IMembershipCondition Copy ()
  86                 {
  87                         return new PublisherMembershipCondition (x509);
  88                 }
  89
  90                 public override bool Equals (object o)
  91                 {
  92                         if (!(o is PublisherMembershipCondition))
  93                                 return false;
  94                         return x509.Equals ((o as PublisherMembershipCondition).Certificate);
  95                 }
  96
  97                 public void FromXml (SecurityElement e)
  98                 {
  99                         FromXml (e, null);
 100                 }
 101
 102                 public void FromXml (SecurityElement e, PolicyLevel level)
 103                 {
 104                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 105                         string cert = e.Attribute ("X509Certificate");
 106                         if (cert != null) {
 107                                 byte[] rawcert = CryptoConvert.FromHex (cert);
 108                                 x509 = new X509Certificate (rawcert);
 109                         }
 110                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 111                 }
 112
 113                 public override int GetHashCode ()
 114                 {
 115                         return x509.GetHashCode ();
 116                 }
 117
 118                 public override string ToString ()
 119                 {
 120                         return "Publisher - " + x509.GetPublicKeyString ();
 121                 }
 122
 123                 public SecurityElement ToXml ()
 124                 {
 125                         return ToXml (null);
 126                 }
 127
 128                 public SecurityElement ToXml (PolicyLevel level)
 129                 {
 130                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 131                         SecurityElement se = MembershipConditionHelper.Element (typeof (PublisherMembershipCondition), version);
 132                         se.AddAttribute ("X509Certificate", x509.GetRawCertDataString ());
 133                         return se;
 134                 }
 135         }
 136 }