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558b914c64
* Rename unity files * Move some modules to new subdirectories * Remove obsolete Visual Studio project files * Remove obsolete coding style and TODO list
115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_ASIO_HANDSHAKE_HANDSHAKEDETECTLOGICSSL2_H_INCLUDED
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#define BEAST_ASIO_HANDSHAKE_HANDSHAKEDETECTLOGICSSL2_H_INCLUDED
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namespace beast {
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namespace asio {
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// Handshake for SSL 2
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//
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// http://tools.ietf.org/html/rfc5246#appendix-E.2
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//
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// std::uint8_t V2CipherSpec[3];
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// struct {
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// std::uint16_t msg_length;
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// std::uint8_t msg_type;
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// Version version; Should be 'ProtocolVersion'?
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// std::uint16_t cipher_spec_length;
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// std::uint16_t session_id_length;
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// std::uint16_t challenge_length;
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// ...
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//
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class HandshakeDetectLogicSSL2 : public HandshakeDetectLogic
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{
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public:
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typedef int arg_type;
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explicit HandshakeDetectLogicSSL2 (arg_type const&)
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{
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}
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enum
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{
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bytesNeeded = 3
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};
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std::size_t max_needed ()
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{
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return bytesNeeded;
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}
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std::size_t bytes_consumed ()
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{
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return 0;
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}
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template <typename ConstBufferSequence>
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void analyze (ConstBufferSequence const& buffer)
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{
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FixedInputBufferSize <bytesNeeded> in (buffer);
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{
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std::uint8_t byte;
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if (! in.peek (&byte))
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return;
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// First byte must have the high bit set
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//
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if((byte & 0x80) != 0x80)
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return fail ();
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}
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// The remaining bits contain the
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// length of the following data in bytes.
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//
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std::uint16_t msg_length;
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if (! in.readNetworkInteger(&msg_length))
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return;
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// sizeof (msg_type +
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// Version (ProtcolVersion?) +
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// cipher_spec_length +
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// session_id_length +
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// challenge_length)
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//
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// Should be 9 or greater.
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//
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if (msg_length < 9)
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return fail ();
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std::uint8_t msg_type;
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if (! in.read (&msg_type))
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return;
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// The msg_type must be 0x01 for a version 2 ClientHello
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//
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if (msg_type != 0x01)
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return fail ();
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conclude ();
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}
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};
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}
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}
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#endif
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