1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
//
// server.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2025 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <cstdlib>
#include <functional>
#include <iostream>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
using boost::asio::ip::tcp;
class session : public std::enable_shared_from_this<session>
{
public:
session(boost::asio::ssl::stream<tcp::socket> socket)
: socket_(std::move(socket))
{
}
void start()
{
do_handshake();
}
private:
void do_handshake()
{
auto self(shared_from_this());
socket_.async_handshake(boost::asio::ssl::stream_base::server,
[this, self](const boost::system::error_code& error)
{
if (!error)
{
do_read();
}
});
}
void do_read()
{
auto self(shared_from_this());
socket_.async_read_some(boost::asio::buffer(data_),
[this, self](const boost::system::error_code& ec, std::size_t length)
{
if (!ec)
{
do_write(length);
}
});
}
void do_write(std::size_t length)
{
auto self(shared_from_this());
boost::asio::async_write(socket_, boost::asio::buffer(data_, length),
[this, self](const boost::system::error_code& ec,
std::size_t /*length*/)
{
if (!ec)
{
do_read();
}
});
}
boost::asio::ssl::stream<tcp::socket> socket_;
char data_[1024];
};
class server
{
public:
server(boost::asio::io_context& io_context, unsigned short port)
: acceptor_(io_context, tcp::endpoint(tcp::v4(), port)),
context_(boost::asio::ssl::context::sslv23)
{
context_.set_options(
boost::asio::ssl::context::default_workarounds
| boost::asio::ssl::context::no_sslv2
| boost::asio::ssl::context::single_dh_use);
context_.set_password_callback(std::bind(&server::get_password, this));
context_.use_certificate_chain_file("server.pem");
context_.use_private_key_file("server.pem", boost::asio::ssl::context::pem);
context_.use_tmp_dh_file("dh4096.pem");
do_accept();
}
private:
std::string get_password() const
{
return "test";
}
void do_accept()
{
acceptor_.async_accept(
[this](const boost::system::error_code& error, tcp::socket socket)
{
if (!error)
{
std::make_shared<session>(
boost::asio::ssl::stream<tcp::socket>(
std::move(socket), context_))->start();
}
do_accept();
});
}
tcp::acceptor acceptor_;
boost::asio::ssl::context context_;
};
int main(int argc, char* argv[])
{
try
{
if (argc != 2)
{
std::cerr << "Usage: server <port>\n";
return 1;
}
boost::asio::io_context io_context;
using namespace std; // For atoi.
server s(io_context, atoi(argv[1]));
io_context.run();
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
return 0;
}
|
