ceph/src/boost/boost/beast/websocket/detail/hybi13.hpp

   1 //
   2 // Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // Official repository: https://github.com/boostorg/beast
   8 //
   9
  10 #ifndef BOOST_BEAST_WEBSOCKET_DETAIL_HYBI13_HPP
  11 #define BOOST_BEAST_WEBSOCKET_DETAIL_HYBI13_HPP
  12
  13 #include <boost/beast/core/static_string.hpp>
  14 #include <boost/beast/core/string.hpp>
  15 #include <boost/beast/core/detail/base64.hpp>
  16 #include <boost/beast/core/detail/sha1.hpp>
  17 #include <boost/assert.hpp>
  18 #include <array>
  19 #include <cstdint>
  20 #include <string>
  21 #include <type_traits>
  22
  23 namespace boost {
  24 namespace beast {
  25 namespace websocket {
  26 namespace detail {
  27
  28 using sec_ws_key_type = static_string<
  29     beast::detail::base64::encoded_size(16)>;
  30
  31 using sec_ws_accept_type = static_string<
  32     beast::detail::base64::encoded_size(20)>;
  33
  34 template<class Gen>
  35 void
  36 make_sec_ws_key(sec_ws_key_type& key, Gen& g)
  37 {
  38     char a[16];
  39     for(int i = 0; i < 16; i += 4)
  40     {
  41         auto const v = g();
  42         a[i  ] =  v        & 0xff;
  43         a[i+1] = (v >>  8) & 0xff;
  44         a[i+2] = (v >> 16) & 0xff;
  45         a[i+3] = (v >> 24) & 0xff;
  46     }
  47     key.resize(key.max_size());
  48     key.resize(beast::detail::base64::encode(
  49         key.data(), &a[0], 16));
  50 }
  51
  52 template<class = void>
  53 void
  54 make_sec_ws_accept(sec_ws_accept_type& accept,
  55     string_view key)
  56 {
  57     BOOST_ASSERT(key.size() <= sec_ws_key_type::max_size_n);
  58     static_string<sec_ws_key_type::max_size_n + 36> m(key);
  59     m.append("258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
  60     beast::detail::sha1_context ctx;
  61     beast::detail::init(ctx);
  62     beast::detail::update(ctx, m.data(), m.size());
  63     char digest[beast::detail::sha1_context::digest_size];
  64     beast::detail::finish(ctx, &digest[0]);
  65     accept.resize(accept.max_size());
  66     accept.resize(beast::detail::base64::encode(
  67         accept.data(), &digest[0], sizeof(digest)));
  68 }
  69
  70 } // detail
  71 } // websocket
  72 } // beast
  73 } // boost
  74
  75 #endif