class/System.IdentityModel/System.IdentityModel.Tokens/SecurityKeyIdentifier.cs

   1 //
   2 // SecurityKeyIdentifier.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2005-2007 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 using System;
  29 using System.Collections;
  30 using System.Collections.Generic;
  31 using System.Text;
  32 using System.Xml;
  33 using System.IdentityModel.Policy;
  34
  35 namespace System.IdentityModel.Tokens
  36 {
  37         public class SecurityKeyIdentifier
  38                 : IEnumerable<SecurityKeyIdentifierClause>, IEnumerable
  39         {
  40                 public SecurityKeyIdentifier ()
  41                 {
  42                         this.list = new List<SecurityKeyIdentifierClause> ();
  43                 }
  44
  45                 public SecurityKeyIdentifier (params SecurityKeyIdentifierClause [] identifiers)
  46                 {
  47                         this.list = new List<SecurityKeyIdentifierClause> (identifiers);
  48                 }
  49
  50                 List<SecurityKeyIdentifierClause> list;
  51                 bool is_readonly;
  52
  53                 public bool CanCreateKey {
  54                         get {
  55                                 foreach (SecurityKeyIdentifierClause kic in this)
  56                                         if (kic.CanCreateKey)
  57                                                 return true;
  58                                 return false;
  59                         }
  60                 }
  61
  62                 public int Count {
  63                         get { return list.Count; }
  64                 }
  65
  66                 public bool IsReadOnly {
  67                         get { return is_readonly; }
  68                 }
  69
  70                 public SecurityKeyIdentifierClause this [int i] {
  71                         get { return list [i]; }
  72                 }
  73
  74                 public void Add (SecurityKeyIdentifierClause item)
  75                 {
  76                         if (is_readonly)
  77                                 throw new InvalidOperationException ("This SecurityKeyIdentifier is read-only.");
  78                         list.Add (item);
  79                 }
  80
  81                 public SecurityKey CreateKey ()
  82                 {
  83                         foreach (SecurityKeyIdentifierClause kic in this)
  84                                 if (kic.CanCreateKey)
  85                                         return kic.CreateKey ();
  86                         throw new ArgumentException ("This key identifier cannot create a key");
  87                 }
  88
  89                 public TClause Find<TClause> ()
  90                         where TClause : SecurityKeyIdentifierClause
  91                 {
  92                         TClause kic;
  93                         if (!TryFind<TClause> (out kic))
  94                                 throw new ArgumentException (String.Format ("{0} was not found in this SecurityKeyIdentifier", typeof (TClause)));
  95                         return kic;
  96                 }
  97
  98                 IEnumerator IEnumerable.GetEnumerator ()
  99                 {
 100                         return GetEnumerator ();
 101                 }
 102
 103                 public IEnumerator<SecurityKeyIdentifierClause> GetEnumerator ()
 104                 {
 105                         return list.GetEnumerator ();
 106                 }
 107
 108                 public void MakeReadOnly ()
 109                 {
 110                         is_readonly = true;
 111                 }
 112
 113                 public override string ToString ()
 114                 {
 115                         if (Count == 0)
 116                                 return "(no key identifier clause)";
 117                         StringBuilder sb = new StringBuilder ();
 118                         sb.AppendFormat ("Total keys: {0}, ", Count);
 119                         foreach (SecurityKeyIdentifierClause kic in this)
 120                                 sb.Append ('{').Append (kic.ToString ()).Append ('}');
 121                         return sb.ToString ();
 122                 }
 123
 124                 public bool TryFind<TClause> (out TClause result)
 125                         where TClause : SecurityKeyIdentifierClause
 126                 {
 127                         result = default (TClause);
 128                         foreach (SecurityKeyIdentifierClause kic in this)
 129                                 if (typeof (TClause).IsAssignableFrom (kic.GetType ())) {
 130                                         result = (TClause) kic;
 131                                         return true;
 132                                 }
 133                         return false;
 134                 }
 135         }
 136 }