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

   1 //
   2 // System.Security.Policy.ApplicationTrust class
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System.IO;
  32 using System.Runtime.InteropServices;
  33 using System.Runtime.Serialization.Formatters.Binary;
  34 using System.Security.Permissions;
  35
  36 using Mono.Security.Cryptography;
  37
  38 namespace System.Security.Policy {
  39
  40         [ComVisible (true)]
  41         public sealed class ApplicationTrust : ISecurityEncodable {
  42
  43                 private ApplicationIdentity _appid;
  44                 private PolicyStatement _defaultPolicy;
  45                 private object _xtranfo;
  46                 private bool _trustrun;
  47                 private bool _persist;
  48
  49                 public ApplicationTrust ()
  50                 {
  51                 }
  52
  53                 public ApplicationTrust (ApplicationIdentity applicationIdentity)
  54                 {
  55                         if (applicationIdentity == null)
  56                                 throw new ArgumentNullException ("applicationIdentity");
  57                         _appid = applicationIdentity;
  58                 }
  59
  60                 public ApplicationIdentity ApplicationIdentity {
  61                         get { return _appid; }
  62                         set {
  63                                 if (value == null)
  64                                         throw new ArgumentNullException ("ApplicationIdentity");
  65                                 _appid = value;
  66                         }
  67                 }
  68
  69                 public PolicyStatement DefaultGrantSet {
  70                         get {
  71                                 if (_defaultPolicy == null)
  72                                         _defaultPolicy = GetDefaultGrantSet ();
  73
  74                                 return _defaultPolicy;
  75                         }
  76                         set { _defaultPolicy = value; }
  77                 }
  78
  79                 public object ExtraInfo {
  80                         get { return _xtranfo; }
  81                         set { _xtranfo = value; }
  82                 }
  83
  84                 public bool IsApplicationTrustedToRun {
  85                         get { return _trustrun; }
  86                         set { _trustrun = value; }
  87                 }
  88
  89                 public bool Persist {
  90                         get { return _persist; }
  91                         set { _persist = value; }
  92                 }
  93
  94                 public void FromXml (SecurityElement element)
  95                 {
  96                         if (element == null)
  97                                 throw new ArgumentNullException ("element");
  98
  99                         if (element.Tag != "ApplicationTrust")
 100                                 throw new ArgumentException ("element");
 101
 102                         string s = element.Attribute ("FullName");
 103                         if (s != null)
 104                                 _appid = new ApplicationIdentity (s);
 105                         else
 106                                 _appid = null;
 107
 108                         _defaultPolicy = null;
 109                         SecurityElement defaultGrant = element.SearchForChildByTag ("DefaultGrant");
 110                         if (defaultGrant != null) {
 111                                 for (int i=0; i < defaultGrant.Children.Count; i++) {
 112                                         SecurityElement se = (defaultGrant.Children [i] as SecurityElement);
 113                                         if (se.Tag == "PolicyStatement") {
 114                                                 DefaultGrantSet.FromXml (se, null);
 115                                                 break;
 116                                         }
 117                                 }
 118                         }
 119
 120                         if (!Boolean.TryParse (element.Attribute ("TrustedToRun"), out _trustrun))
 121                                 _trustrun = false;
 122
 123                         if (!Boolean.TryParse (element.Attribute ("Persist"), out _persist))
 124                                 _persist = false;
 125
 126                         _xtranfo = null;
 127                         SecurityElement xtra = element.SearchForChildByTag ("ExtraInfo");
 128                         if (xtra != null) {
 129                                 s = xtra.Attribute ("Data");
 130                                 if (s != null) {
 131                                         byte[] data = CryptoConvert.FromHex (s);
 132                                         using (MemoryStream ms = new MemoryStream (data)) {
 133                                                 BinaryFormatter bf = new BinaryFormatter ();
 134                                                 _xtranfo = bf.Deserialize (ms);
 135                                         }
 136                                 }
 137                         }
 138                 }
 139
 140                 public SecurityElement ToXml ()
 141                 {
 142                         SecurityElement se = new SecurityElement ("ApplicationTrust");
 143                         se.AddAttribute ("version", "1");
 144
 145                         if (_appid != null) {
 146                                 se.AddAttribute ("FullName", _appid.FullName);
 147                         }
 148
 149                         if (_trustrun) {
 150                                 se.AddAttribute ("TrustedToRun", "true");
 151                         }
 152
 153                         if (_persist) {
 154                                 se.AddAttribute ("Persist", "true");
 155                         }
 156
 157                         SecurityElement defaultGrant = new SecurityElement ("DefaultGrant");
 158                         defaultGrant.AddChild (DefaultGrantSet.ToXml ());
 159                         se.AddChild (defaultGrant);
 160
 161                         if (_xtranfo != null) {
 162                                 byte[] data = null;
 163                                 using (MemoryStream ms = new MemoryStream ()) {
 164                                         BinaryFormatter bf = new BinaryFormatter ();
 165                                         bf.Serialize (ms, _xtranfo);
 166                                         data = ms.ToArray ();
 167                                 }
 168                                 SecurityElement xtra = new SecurityElement ("ExtraInfo");
 169                                 xtra.AddAttribute ("Data", CryptoConvert.ToHex (data));
 170                                 se.AddChild (xtra);
 171                         }
 172
 173                         return se;
 174                 }
 175
 176                 // internal stuff
 177
 178                 private PolicyStatement GetDefaultGrantSet ()
 179                 {
 180                         PermissionSet ps = new PermissionSet (PermissionState.None);
 181                         return new PolicyStatement (ps);
 182                 }
 183         }
 184 }
 185
 186 #endif