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

   1 //
   2 // System.Security.Policy.ApplicationTrust.cs
   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
  30 using System.IO;
  31 using System.Runtime.InteropServices;
  32 using System.Runtime.Serialization.Formatters.Binary;
  33 using System.Security.Permissions;
  34
  35 using Mono.Security.Cryptography;
  36 using System.Collections.Generic;
  37
  38 namespace System.Security.Policy
  39 {
  40         [Serializable]
  41         [ComVisible (true)]
  42         public sealed class ApplicationTrust :
  43 #if NET_4_0
  44                 EvidenceBase,
  45 #endif
  46                 ISecurityEncodable {
  47
  48                 private ApplicationIdentity _appid;
  49                 private PolicyStatement _defaultPolicy;
  50                 private object _xtranfo;
  51                 private bool _trustrun;
  52                 private bool _persist;
  53                 IList<StrongName> fullTrustAssemblies;
  54
  55                 public ApplicationTrust ()
  56                 {
  57                         fullTrustAssemblies = new List<StrongName> (0);
  58                 }
  59
  60                 public ApplicationTrust (ApplicationIdentity applicationIdentity)
  61                         : this ()
  62                 {
  63                         if (applicationIdentity == null)
  64                                 throw new ArgumentNullException ("applicationIdentity");
  65                         _appid = applicationIdentity;
  66                 }
  67
  68 #if NET_4_0
  69                 public
  70 #else
  71                 internal
  72 #endif
  73                 ApplicationTrust (PermissionSet defaultGrantSet, IEnumerable<StrongName> fullTrustAssemblies)
  74                 {
  75                         if (defaultGrantSet == null)
  76                                 throw new ArgumentNullException ("defaultGrantSet");
  77
  78                         _defaultPolicy = new PolicyStatement (defaultGrantSet);
  79
  80                         if (fullTrustAssemblies == null)
  81                                 throw new ArgumentNullException ("fullTrustAssemblies");
  82
  83                         this.fullTrustAssemblies = new List<StrongName> ();
  84                         foreach (var a in fullTrustAssemblies) {
  85                                 if (a == null)
  86                                         throw new ArgumentException ("fullTrustAssemblies contains an assembly that does not have a StrongName");
  87
  88                                 this.fullTrustAssemblies.Add ((StrongName) a.Copy ());
  89                         }
  90                 }
  91
  92                 public ApplicationIdentity ApplicationIdentity {
  93                         get { return _appid; }
  94                         set {
  95                                 if (value == null)
  96                                         throw new ArgumentNullException ("ApplicationIdentity");
  97                                 _appid = value;
  98                         }
  99                 }
 100
 101                 public PolicyStatement DefaultGrantSet {
 102                         get {
 103                                 if (_defaultPolicy == null)
 104                                         _defaultPolicy = GetDefaultGrantSet ();
 105
 106                                 return _defaultPolicy;
 107                         }
 108                         set { _defaultPolicy = value; }
 109                 }
 110
 111                 public object ExtraInfo {
 112                         get { return _xtranfo; }
 113                         set { _xtranfo = value; }
 114                 }
 115
 116                 public bool IsApplicationTrustedToRun {
 117                         get { return _trustrun; }
 118                         set { _trustrun = value; }
 119                 }
 120
 121                 public bool Persist {
 122                         get { return _persist; }
 123                         set { _persist = value; }
 124                 }
 125
 126                 public void FromXml (SecurityElement element)
 127                 {
 128                         if (element == null)
 129                                 throw new ArgumentNullException ("element");
 130
 131                         if (element.Tag != "ApplicationTrust")
 132                                 throw new ArgumentException ("element");
 133
 134                         string s = element.Attribute ("FullName");
 135                         if (s != null)
 136                                 _appid = new ApplicationIdentity (s);
 137                         else
 138                                 _appid = null;
 139
 140                         _defaultPolicy = null;
 141                         SecurityElement defaultGrant = element.SearchForChildByTag ("DefaultGrant");
 142                         if (defaultGrant != null) {
 143                                 for (int i=0; i < defaultGrant.Children.Count; i++) {
 144                                         SecurityElement se = (defaultGrant.Children [i] as SecurityElement);
 145                                         if (se.Tag == "PolicyStatement") {
 146                                                 DefaultGrantSet.FromXml (se, null);
 147                                                 break;
 148                                         }
 149                                 }
 150                         }
 151
 152                         if (!Boolean.TryParse (element.Attribute ("TrustedToRun"), out _trustrun))
 153                                 _trustrun = false;
 154
 155                         if (!Boolean.TryParse (element.Attribute ("Persist"), out _persist))
 156                                 _persist = false;
 157
 158                         _xtranfo = null;
 159                         SecurityElement xtra = element.SearchForChildByTag ("ExtraInfo");
 160                         if (xtra != null) {
 161                                 s = xtra.Attribute ("Data");
 162                                 if (s != null) {
 163                                         byte[] data = CryptoConvert.FromHex (s);
 164                                         using (MemoryStream ms = new MemoryStream (data)) {
 165                                                 BinaryFormatter bf = new BinaryFormatter ();
 166                                                 _xtranfo = bf.Deserialize (ms);
 167                                         }
 168                                 }
 169                         }
 170                 }
 171
 172                 public SecurityElement ToXml ()
 173                 {
 174                         SecurityElement se = new SecurityElement ("ApplicationTrust");
 175                         se.AddAttribute ("version", "1");
 176
 177                         if (_appid != null) {
 178                                 se.AddAttribute ("FullName", _appid.FullName);
 179                         }
 180
 181                         if (_trustrun) {
 182                                 se.AddAttribute ("TrustedToRun", "true");
 183                         }
 184
 185                         if (_persist) {
 186                                 se.AddAttribute ("Persist", "true");
 187                         }
 188
 189                         SecurityElement defaultGrant = new SecurityElement ("DefaultGrant");
 190                         defaultGrant.AddChild (DefaultGrantSet.ToXml ());
 191                         se.AddChild (defaultGrant);
 192
 193                         if (_xtranfo != null) {
 194                                 byte[] data = null;
 195                                 using (MemoryStream ms = new MemoryStream ()) {
 196                                         BinaryFormatter bf = new BinaryFormatter ();
 197                                         bf.Serialize (ms, _xtranfo);
 198                                         data = ms.ToArray ();
 199                                 }
 200                                 SecurityElement xtra = new SecurityElement ("ExtraInfo");
 201                                 xtra.AddAttribute ("Data", CryptoConvert.ToHex (data));
 202                                 se.AddChild (xtra);
 203                         }
 204
 205                         return se;
 206                 }
 207
 208 #if NET_4_0
 209                 public IList<StrongName> FullTrustAssemblies {
 210                         get {
 211                                 return fullTrustAssemblies;
 212                         }
 213                 }
 214 #endif
 215
 216                 // internal stuff
 217
 218                 private PolicyStatement GetDefaultGrantSet ()
 219                 {
 220                         PermissionSet ps = new PermissionSet (PermissionState.None);
 221                         return new PolicyStatement (ps);
 222                 }
 223         }
 224 }
 225