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 // (C) 2004 Novell (http://www.novell.com)
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Collections;
  36 using System.Security.Cryptography.X509Certificates;
  37 using System.Text;
  38
  39 using Mono.Security.Cryptography;
  40
  41 namespace System.Security.Policy {
  42
  43         [Serializable]
  44         public sealed class PublisherMembershipCondition
  45                 : IConstantMembershipCondition, IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable {
  46
  47                 private X509Certificate x509;
  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                         IEnumerator e = evidence.GetHostEnumerator ();
  73                         while (e.MoveNext ()) {
  74                                 if (e.Current is Publisher) {
  75                                         if (x509.Equals ((e.Current as Publisher).Certificate))
  76                                                 return true;
  77                                 }
  78                         }
  79                         return false;
  80                 }
  81
  82                 public IMembershipCondition Copy ()
  83                 {
  84                         return new PublisherMembershipCondition (x509);
  85                 }
  86
  87                 public override bool Equals (object o)
  88                 {
  89                         if (!(o is PublisherMembershipCondition))
  90                                 throw new ArgumentException ("not a PublisherMembershipCondition");
  91                         return x509.Equals ((o as PublisherMembershipCondition).Certificate);
  92                 }
  93
  94                 public void FromXml (SecurityElement e)
  95                 {
  96                         FromXml (e, null);
  97                 }
  98
  99                 public void FromXml (SecurityElement e, PolicyLevel level)
 100                 {
 101                         if (e == null)
 102                                 throw new ArgumentNullException ("e");
 103                         if (e.Tag != "IMembershipCondition")
 104                                 throw new ArgumentException ("Not IMembershipCondition", "e");
 105                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 106                         string cert = e.Attribute ("X509Certificate");
 107                         if (cert != null) {
 108                                 byte[] rawcert = CryptoConvert.FromHex (cert);
 109                                 x509 = new X509Certificate (rawcert);
 110                         }
 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                 // snippet moved from FileIOPermission (nickd) to be reused in all derived classes
 124                 internal SecurityElement Element (object o, int version)
 125                 {
 126                         SecurityElement se = new SecurityElement ("IMembershipCondition");
 127                         Type type = this.GetType ();
 128                         StringBuilder asmName = new StringBuilder (type.Assembly.ToString ());
 129                         asmName.Replace ('\"', '\'');
 130                         se.AddAttribute ("class", type.FullName + ", " + asmName);
 131                         se.AddAttribute ("version", version.ToString ());
 132                         return se;
 133                 }
 134
 135                 public SecurityElement ToXml ()
 136                 {
 137                         return ToXml (null);
 138                 }
 139
 140                 public SecurityElement ToXml (PolicyLevel level)
 141                 {
 142                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 143                         SecurityElement se = Element (this, 1);
 144                         se.AddAttribute ("X509Certificate", x509.GetRawCertDataString ());
 145                         return se;
 146                 }
 147         }
 148 }