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#include <botan/botan.h>
#include <botan/tls_server.h>
#include <botan/rsa.h>
#include <botan/dsa.h>
#include <botan/x509self.h>
#include <botan/secqueue.h>
#include "socket.h"
using namespace Botan;
#include <stdio.h>
#include <string>
#include <iostream>
#include <memory>
class Blocking_TLS_Server
{
public:
Blocking_TLS_Server(std::tr1::function<void (const byte[], size_t)> output_fn,
std::tr1::function<size_t (byte[], size_t)> input_fn,
TLS_Session_Manager& sessions,
TLS_Policy& policy,
RandomNumberGenerator& rng,
const X509_Certificate& cert,
const Private_Key& key) :
input_fn(input_fn),
server(
output_fn,
std::tr1::bind(&Blocking_TLS_Server::reader_fn, std::tr1::ref(*this), _1, _2, _3),
sessions,
policy,
rng,
cert,
key),
exit(false)
{
read_loop();
}
size_t read(byte buf[], size_t buf_len)
{
size_t got = read_queue.read(buf, buf_len);
while(!exit && !got)
{
read_loop(5); // header size
got = read_queue.read(buf, buf_len);
}
return got;
}
void write(const byte buf[], size_t buf_len)
{
server.queue_for_sending(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, u16bit alert_code)
{
if(buf_len == 0 && alert_code != NULL_ALERT)
{
printf("Alert: %d\n", alert_code);
//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::tr1::function<size_t (byte[], size_t)> input_fn;
TLS_Server server;
SecureQueue read_queue;
bool exit;
};
class Server_TLS_Policy : public TLS_Policy
{
public:
bool require_client_auth() const { return true; }
bool check_cert(const std::vector<X509_Certificate>& certs) const
{
for(size_t i = 0; i != certs.size(); ++i)
{
std::cout << certs[i].to_string();
}
std::cout << "Warning: not checking cert signatures\n";
return true;
}
};
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;
RSA_PrivateKey key(rng, 1024);
//DSA_PrivateKey key(rng, DL_Group("dsa/jce/1024"));
X509_Cert_Options options(
"localhost/US/Syn Ack Labs/Mathematical Munitions Dept");
X509_Certificate cert =
X509::create_self_signed_cert(options, key, "SHA-1", rng);
Server_Socket listener(port);
Server_TLS_Policy policy;
TLS_Session_Manager_In_Memory sessions;
while(true)
{
try {
printf("Listening for new connection on port %d\n", port);
Socket* sock = listener.accept();
printf("Got new connection\n");
Blocking_TLS_Server tls(
std::tr1::bind(&Socket::write, std::tr1::ref(sock), _1, _2),
std::tr1::bind(&Socket::read, std::tr1::ref(sock), _1, _2, true),
sessions,
policy,
rng,
cert,
key);
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')
{
tls.write(reinterpret_cast<const byte*>(line.data()), line.size());
if(line == "quit\n")
{
tls.close();
break;
}
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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