class/Mono.Security/Mono.Security.Protocol.Tls.Handshake.Server/TlsServerCertificateRequest.cs

   1 // Transport Security Layer (TLS)
   2 // Copyright (c) 2003-2004 Carlos Guzman Alvarez
   3
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 using System;
  26 using System.Text;
  27 using Mono.Security;
  28 using Mono.Security.X509;
  29
  30 namespace Mono.Security.Protocol.Tls.Handshake.Server
  31 {
  32         internal class TlsServerCertificateRequest : HandshakeMessage
  33         {
  34                 #region Constructors
  35
  36                 public TlsServerCertificateRequest(Context context)
  37                         : base(context, HandshakeType.CertificateRequest)
  38                 {
  39                 }
  40
  41                 #endregion
  42
  43                 #region Protected Methods
  44
  45                 protected override void ProcessAsSsl3()
  46                 {
  47                         this.ProcessAsTls1();
  48                 }
  49
  50                 protected override void ProcessAsTls1()
  51                 {
  52                         ServerContext context = (ServerContext)this.Context;
  53
  54                         int count = context.ServerSettings.CertificateTypes.Length;
  55
  56                         this.WriteByte(Convert.ToByte(count));
  57
  58                         // Write requested certificate types
  59                         for (int i = 0; i < count; i++)
  60                         {
  61                                 this.WriteByte((byte)context.ServerSettings.CertificateTypes[i]);
  62                         }
  63
  64                         /*
  65                          * Write requested certificate authorities (Distinguised Names)
  66                          *
  67                          * Name ::= SEQUENCE OF RelativeDistinguishedName
  68                          *
  69                          * RelativeDistinguishedName ::= SET OF AttributeValueAssertion
  70                          *
  71                          * AttributeValueAssertion ::= SEQUENCE {
  72                          * attributeType OBJECT IDENTIFIER
  73                          * attributeValue ANY }
  74                          */
  75
  76                         if (context.ServerSettings.DistinguisedNames.Length > 0)
  77                         {
  78                                 TlsStream list = new TlsStream ();
  79                                 // this is the worst formating ever :-|
  80                                 foreach (string dn in context.ServerSettings.DistinguisedNames)
  81                                 {
  82                                         byte[] name = X501.FromString (dn).GetBytes ();
  83                                         list.Write ((short)name.Length);
  84                                         list.Write (name);
  85                                 }
  86                                 this.Write ((short)list.Length);
  87                                 this.Write (list.ToArray ());
  88                         }
  89                         else
  90                         {
  91                                 this.Write ((short)0);
  92                         }
  93                 }
  94
  95                 #endregion
  96         }
  97 }