mcs/class/Mono.Security/Mono.Security.X509/X509Extensions.cs

   1 //
   2 // X509Extensions.cs: Handles X.509 extensions.
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // (C) 2004 Novell (http://www.novell.com)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Collections;
  34
  35 using Mono.Security;
  36
  37 namespace Mono.Security.X509 {
  38         /*
  39          * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
  40          *
  41          * Note: 1..MAX -> There shouldn't be 0 Extensions in the ASN1 structure
  42          */
  43 #if INSIDE_CORLIB
  44         internal
  45 #else
  46         public
  47 #endif
  48         sealed class X509ExtensionCollection : CollectionBase, IEnumerable {
  49
  50                 private bool readOnly;
  51
  52                 public X509ExtensionCollection () : base ()
  53                 {
  54                 }
  55
  56                 public X509ExtensionCollection (ASN1 asn1) : this ()
  57                 {
  58                         readOnly = true;
  59                         if (asn1 == null)
  60                                 return;
  61                         if (asn1.Tag != 0x30)
  62                                 throw new Exception ("Invalid extensions format");
  63                         for (int i=0; i < asn1.Count; i++) {
  64                                 X509Extension extension = new X509Extension (asn1 [i]);
  65                                 InnerList.Add (extension);
  66                         }
  67                 }
  68
  69                 public int Add (X509Extension extension)
  70                 {
  71                         if (extension == null)
  72                                 throw new ArgumentNullException ("extension");
  73                         if (readOnly)
  74                                 throw new NotSupportedException ("Extensions are read only");
  75
  76                         return InnerList.Add (extension);
  77                 }
  78
  79                 public void AddRange (X509Extension[] extension)
  80                 {
  81                         if (extension == null)
  82                                 throw new ArgumentNullException ("extension");
  83                         if (readOnly)
  84                                 throw new NotSupportedException ("Extensions are read only");
  85
  86                         for (int i = 0; i < extension.Length; i++)
  87                                 InnerList.Add (extension [i]);
  88                 }
  89
  90                 public void AddRange (X509ExtensionCollection collection)
  91                 {
  92                         if (collection == null)
  93                                 throw new ArgumentNullException ("collection");
  94                         if (readOnly)
  95                                 throw new NotSupportedException ("Extensions are read only");
  96
  97                         for (int i = 0; i < collection.InnerList.Count; i++)
  98                                 InnerList.Add (collection [i]);
  99                 }
 100
 101                 public bool Contains (X509Extension extension)
 102                 {
 103                         return (IndexOf (extension) != -1);
 104                 }
 105
 106                 public bool Contains (string oid)
 107                 {
 108                         return (IndexOf (oid) != -1);
 109                 }
 110
 111                 public void CopyTo (X509Extension[] extensions, int index)
 112                 {
 113                         if (extensions == null)
 114                                 throw new ArgumentNullException ("extensions");
 115
 116                         InnerList.CopyTo (extensions, index);
 117                 }
 118
 119                 public int IndexOf (X509Extension extension)
 120                 {
 121                         if (extension == null)
 122                                 throw new ArgumentNullException ("extension");
 123
 124                         for (int i=0; i < InnerList.Count; i++) {
 125                                 X509Extension ex = (X509Extension) InnerList [i];
 126                                 if (ex.Equals (extension))
 127                                         return i;
 128                         }
 129                         return -1;
 130                 }
 131
 132                 public int IndexOf (string oid)
 133                 {
 134                         if (oid == null)
 135                                 throw new ArgumentNullException ("oid");
 136
 137                         for (int i=0; i < InnerList.Count; i++) {
 138                                 X509Extension ex = (X509Extension) InnerList [i];
 139                                 if (ex.Oid == oid)
 140                                         return i;
 141                         }
 142                         return -1;
 143                 }
 144
 145                 public void Insert (int index, X509Extension extension)
 146                 {
 147                         if (extension == null)
 148                                 throw new ArgumentNullException ("extension");
 149
 150                         InnerList.Insert (index, extension);
 151                 }
 152
 153                 public void Remove (X509Extension extension)
 154                 {
 155                         if (extension == null)
 156                                 throw new ArgumentNullException ("extension");
 157
 158                         InnerList.Remove (extension);
 159                 }
 160
 161                 public void Remove (string oid)
 162                 {
 163                         if (oid == null)
 164                                 throw new ArgumentNullException ("oid");
 165
 166                         int index = IndexOf (oid);
 167                         if (index != -1)
 168                                 InnerList.RemoveAt (index);
 169                 }
 170
 171                 IEnumerator IEnumerable.GetEnumerator ()
 172                 {
 173                         return InnerList.GetEnumerator ();
 174                 }
 175
 176                 public X509Extension this [int index] {
 177                         get { return (X509Extension) InnerList [index]; }
 178                 }
 179
 180                 public X509Extension this [string oid] {
 181                         get {
 182                                 int index = IndexOf (oid);
 183                                 if (index == -1)
 184                                         return null;
 185                                 return (X509Extension) InnerList [index];
 186                         }
 187                 }
 188
 189                 public byte[] GetBytes ()
 190                 {
 191                         if (InnerList.Count < 1)
 192                                 return null;
 193                         ASN1 sequence = new ASN1 (0x30);
 194                         for (int i=0; i < InnerList.Count; i++) {
 195                                 X509Extension x = (X509Extension) InnerList [i];
 196                                 sequence.Add (x.ASN1);
 197                         }
 198                         return sequence.GetBytes ();
 199                 }
 200         }
 201 }