1 // Transport Security Layer (TLS)
2 // Copyright (c) 2003-2004 Carlos Guzman Alvarez
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:
13 // The above copyright notice and this permission notice shall be
14 // included in all copies or substantial portions of the Software.
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.
26 using System
.Security
.Cryptography
;
28 namespace Mono
.Security
.Protocol
.Tls
.Handshake
.Client
30 internal class TlsClientHello
: HandshakeMessage
34 private byte[] random
;
40 public TlsClientHello(Context context
)
41 : base(context
, HandshakeType
.ClientHello
)
49 public override void Update()
51 ClientContext context
= (ClientContext
)this.Context
;
55 context
.ClientRandom
= random
;
56 context
.ClientHelloProtocol
= this.Context
.Protocol
;
63 #region Protected Methods
65 protected override void ProcessAsSsl3()
70 protected override void ProcessAsTls1()
73 this.Write(this.Context
.Protocol
);
75 // Random bytes - Unix time + Radom bytes [28]
76 TlsStream clientRandom
= new TlsStream();
77 clientRandom
.Write(this.Context
.GetUnixTime());
78 clientRandom
.Write(this.Context
.GetSecureRandomBytes(28));
79 this.random
= clientRandom
.ToArray();
82 this.Write(this.random
);
85 // Send the session ID empty
86 if (this.Context
.SessionId
!= null)
88 this.Write((byte)this.Context
.SessionId
.Length
);
89 if (this.Context
.SessionId
.Length
> 0)
91 this.Write(this.Context
.SessionId
);
99 // Write length of Cipher suites
100 this.Write((short)(this.Context
.SupportedCiphers
.Count
*2));
102 // Write Supported Cipher suites
103 for (int i
= 0; i
< this.Context
.SupportedCiphers
.Count
; i
++)
105 this.Write((short)this.Context
.SupportedCiphers
[i
].Code
);
108 // Compression methods length
111 // Compression methods ( 0 = none )
112 this.Write((byte)this.Context
.CompressionMethod
);