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#include <botan/botan.h>
#include <botan/tls_server.h>
#include <botan/hex.h>
#include <botan/rsa.h>
#include <botan/dsa.h>
#include <botan/x509self.h>
#include <botan/secqueue.h>
#include "socket.h"
#include "credentials.h"
using namespace Botan;
using namespace std::placeholders;
#include <stdio.h>
#include <string>
#include <iostream>
#include <memory>
class Blocking_TLS_Server
{
public:
Blocking_TLS_Server(std::function<void (const byte[], size_t)> output_fn,
std::function<size_t (byte[], size_t)> input_fn,
std::vector<std::string>& protocols,
TLS::Session_Manager& sessions,
Credentials_Manager& creds,
TLS::Policy& policy,
RandomNumberGenerator& rng) :
input_fn(input_fn),
server(
output_fn,
std::bind(&Blocking_TLS_Server::reader_fn, std::ref(*this), _1, _2, _3),
std::bind(&Blocking_TLS_Server::handshake_complete, std::ref(*this), _1),
sessions,
creds,
policy,
rng,
protocols),
exit(false)
{
read_loop();
}
bool handshake_complete(const TLS::Session& session)
{
std::cout << "Handshake complete: "
<< session.version().to_string() << " "
<< session.ciphersuite().to_string() << " "
<< "SessionID: " << hex_encode(session.session_id()) << "\n";
if(session.srp_identifier() != "")
std::cout << "SRP identifier: " << session.srp_identifier() << "\n";
if(server.next_protocol() != "")
std::cout << "Next protocol: " << server.next_protocol() << "\n";
/*
std::vector<X509_Certificate> peer_certs = session.peer_certs();
if(peer_certs.size())
std::cout << peer_certs[0].to_string();
*/
return true;
}
size_t read(byte buf[], size_t buf_len)
{
size_t got = read_queue.read(buf, buf_len);
while(!exit && !got)
{
read_loop(TLS::TLS_HEADER_SIZE);
got = read_queue.read(buf, buf_len);
}
return got;
}
void write(const byte buf[], size_t buf_len)
{
server.send(buf, buf_len);
}
void close() { server.close(); }
bool is_active() const { return server.is_active(); }
TLS::Server& underlying() { return server; }
private:
void read_loop(size_t init_desired = 0)
{
size_t desired = init_desired;
byte buf[4096];
while(!exit && (!server.is_active() || desired))
{
const size_t asking = std::max(sizeof(buf), std::min(desired, static_cast<size_t>(1)));
const size_t socket_got = input_fn(&buf[0], asking);
if(socket_got == 0) // eof?
{
close();
printf("got eof on socket\n");
exit = true;
}
desired = server.received_data(&buf[0], socket_got);
}
}
void reader_fn(const byte buf[], size_t buf_len, TLS::Alert alert)
{
if(alert.is_valid())
{
printf("Alert %s\n", alert.type_string().c_str());
//exit = true;
}
printf("Got %d bytes: ", (int)buf_len);
for(size_t i = 0; i != buf_len; ++i)
{
if(isprint(buf[i]))
printf("%c", buf[i]);
}
printf("\n");
read_queue.write(buf, buf_len);
}
std::function<size_t (byte[], size_t)> input_fn;
TLS::Server server;
SecureQueue read_queue;
bool exit;
};
int main(int argc, char* argv[])
{
int port = 4433;
if(argc == 2)
port = to_u32bit(argv[1]);
try
{
LibraryInitializer botan_init;
//SocketInitializer socket_init;
AutoSeeded_RNG rng;
Server_Socket listener(port);
TLS::Policy policy;
TLS::Session_Manager_In_Memory sessions;
Credentials_Manager_Simple creds(rng);
std::vector<std::string> protocols;
/*
* These are the protocols we advertise to the client, but the
* client will send back whatever it actually plans on talking,
* which may or may not take into account what we advertise.
*/
protocols.push_back("echo/1.0");
protocols.push_back("echo/1.1");
while(true)
{
try {
printf("Listening for new connection on port %d\n", port);
std::auto_ptr<Socket> sock(listener.accept());
printf("Got new connection\n");
Blocking_TLS_Server tls(
std::bind(&Socket::write, std::ref(sock), _1, _2),
std::bind(&Socket::read, std::ref(sock), _1, _2, true),
protocols,
sessions,
creds,
policy,
rng);
const char* msg = "Welcome to the best echo server evar\n";
tls.write((const Botan::byte*)msg, strlen(msg));
std::string line;
while(tls.is_active())
{
byte b;
size_t got = tls.read(&b, 1);
if(got == 0)
break;
line += (char)b;
if(b == '\n')
{
//std::cout << line;
tls.write(reinterpret_cast<const byte*>(line.data()), line.size());
if(line == "quit\n")
{
tls.close();
break;
}
if(line == "reneg\n")
tls.underlying().renegotiate(false);
else if(line == "RENEG\n")
tls.underlying().renegotiate(true);
line.clear();
}
}
}
catch(std::exception& e) { printf("Connection problem: %s\n", e.what()); }
}
}
catch(std::exception& e)
{
printf("%s\n", e.what());
return 1;
}
return 0;
}
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