ceph/src/Beast/include/beast/websocket/detail/hybi13.hpp

   1 //
   2 // Copyright (c) 2013-2017 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
   8 #ifndef BEAST_WEBSOCKET_DETAIL_HYBI13_HPP
   9 #define BEAST_WEBSOCKET_DETAIL_HYBI13_HPP
  10
  11 #include <beast/core/detail/base64.hpp>
  12 #include <beast/core/detail/sha1.hpp>
  13 #include <boost/utility/string_ref.hpp>
  14 #include <array>
  15 #include <cstdint>
  16 #include <string>
  17 #include <type_traits>
  18
  19 namespace beast {
  20 namespace websocket {
  21 namespace detail {
  22
  23 template<class Gen>
  24 std::string
  25 make_sec_ws_key(Gen& g)
  26 {
  27     std::array<std::uint8_t, 16> a;
  28     for(int i = 0; i < 16; i += 4)
  29     {
  30         auto const v = g();
  31         a[i  ] =  v        & 0xff;
  32         a[i+1] = (v >>  8) & 0xff;
  33         a[i+2] = (v >> 16) & 0xff;
  34         a[i+3] = (v >> 24) & 0xff;
  35     }
  36     return beast::detail::base64_encode(
  37         a.data(), a.size());
  38 }
  39
  40 template<class = void>
  41 std::string
  42 make_sec_ws_accept(boost::string_ref const& key)
  43 {
  44     std::string s(key.data(), key.size());
  45     s += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
  46     beast::detail::sha1_context ctx;
  47     beast::detail::init(ctx);
  48     beast::detail::update(ctx, s.data(), s.size());
  49     std::array<std::uint8_t,
  50         beast::detail::sha1_context::digest_size> digest;
  51     beast::detail::finish(ctx, digest.data());
  52     return beast::detail::base64_encode(
  53         digest.data(), digest.size());
  54 }
  55
  56 } // detail
  57 } // websocket
  58 } // beast
  59
  60 #endif