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 using System;
  11 using System.Globalization;
  12 using System.Security.Permissions;
  13
  14 namespace System.Security.Policy {
  15
  16         public sealed class StrongNameMembershipCondition
  17                 : IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable, IConstantMembershipCondition
  18         {
  19                 StrongNamePublicKeyBlob blob;
  20                 string name;
  21                 Version version;
  22
  23                 public StrongNameMembershipCondition (StrongNamePublicKeyBlob blob, string name, Version version)
  24                 {
  25                         if (blob == null)
  26                                 throw new ArgumentNullException ("blob");
  27
  28                         this.blob = blob;
  29                         this.name = name;
  30                         this.version = version;
  31                 }
  32
  33                 // for PolicyLevel (to avoid validation duplication)
  34                 internal StrongNameMembershipCondition (SecurityElement e)
  35                 {
  36                         FromXml (e);
  37                 }
  38
  39                 // properties
  40
  41                 public string Name {
  42
  43                         get { return name; }
  44
  45                         set { name = value; }
  46                 }
  47
  48                 public Version Version {
  49
  50                         get { return version; }
  51
  52                         set { version = value; }
  53                 }
  54
  55                 public StrongNamePublicKeyBlob PublicKey {
  56
  57                         get { return blob; }
  58
  59                         set {
  60                                 if (value == null)
  61                                         throw new ArgumentNullException (
  62                                                 Locale.GetText ("The argument is null."));
  63
  64                                 blob = value;
  65                         }
  66                 }
  67
  68                 public bool Check (Evidence evidence)
  69                 {
  70                         if (evidence == null)
  71                                 return false;
  72
  73                         foreach (object o in evidence) {
  74                                 if (o is StrongName) {
  75                                         StrongName sn = (o as StrongName);
  76                                         if (sn.PublicKey.Equals (blob) && (sn.Name == name) && (sn.Version.Equals (version)))
  77                                                 return true;
  78                                 }
  79                         }
  80                         return false;
  81                 }
  82
  83                 public IMembershipCondition Copy ()
  84                 {
  85                         return new StrongNameMembershipCondition (blob, name, version);
  86                 }
  87
  88                 public override bool Equals (object o)
  89                 {
  90                         if (o is StrongNameMembershipCondition == false)
  91                                 return false;
  92                         else {
  93                                 StrongNameMembershipCondition snmc = (StrongNameMembershipCondition) o;
  94                                 return (snmc.Name == Name && snmc.Version == Version && snmc.PublicKey == PublicKey);
  95                         }
  96                 }
  97
  98                 public override int GetHashCode ()
  99                 {
 100                         return blob.GetHashCode ();
 101                 }
 102
 103                 public void FromXml (SecurityElement e)
 104                 {
 105                         FromXml (e, null);
 106                 }
 107
 108                 public void FromXml (SecurityElement e, PolicyLevel level)
 109                 {
 110                         if (e == null)
 111                                 throw new ArgumentNullException ("e");
 112
 113                         if (e.Attribute ("class").IndexOf (GetType ().Name) < 0)
 114                                 throw new ArgumentException (Locale.GetText ("Invalid class"));
 115
 116                         if (e.Attribute ("version") != "1")
 117                                 throw new ArgumentException (Locale.GetText ("Invalid version"));
 118
 119                         blob = StrongNamePublicKeyBlob.FromString (e.Attribute ("PublicKeyBlob"));
 120                         name = e.Attribute ("Name");
 121                         string v = (string) e.Attribute ("AssemblyVersion");
 122                         if (v == null)
 123                                 version = new Version ();
 124                         else
 125                                 version = new Version (v);
 126                 }
 127
 128                 public override string ToString ()
 129                 {
 130                         return String.Format ( "Strong Name - {0} name = {1} version {2}",
 131                                         blob, name, version);
 132                 }
 133
 134                 public SecurityElement ToXml ()
 135                 {
 136                         return ToXml (null);
 137                 }
 138
 139                 public SecurityElement ToXml (PolicyLevel level)
 140                 {
 141                         SecurityElement element = new SecurityElement ("IMembershipCondition");
 142                         element.AddAttribute ("class", this.GetType ().AssemblyQualifiedName);
 143                         element.AddAttribute ("version", "1");
 144
 145                         element.AddAttribute ("PublicKeyBlob", blob.ToString ());
 146                         element.AddAttribute ("Name", name);
 147                         string v = version.ToString ();
 148                         if (v != "0.0")
 149                                 element.AddAttribute ("AssemblyVersion", version.ToString ());
 150
 151                         return element;
 152                 }
 153         }
 154 }