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#include <botan/botan.h>
#include <botan/tls_client.h>
#include <botan/pkcs8.h>
#include <botan/hex.h>
#include <stdio.h>
#include <string>
#include <iostream>
#include <memory>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
#include <botan/tls_session_manager_sqlite.h>
#endif
#include "credentials.h"
using namespace Botan;
using namespace std::placeholders;
int connect_to_host(const std::string& host, u16bit port, const std::string& transport)
{
hostent* host_addr = ::gethostbyname(host.c_str());
if(host_addr == 0)
throw std::runtime_error("gethostbyname failed for " + host);
if(host_addr->h_addrtype != AF_INET) // FIXME
throw std::runtime_error(host + " has IPv6 address");
int type = (transport == "tcp") ? SOCK_STREAM : SOCK_DGRAM;
int fd = ::socket(PF_INET, type, 0);
if(fd == -1)
throw std::runtime_error("Unable to acquire socket");
sockaddr_in socket_info;
::memset(&socket_info, 0, sizeof(socket_info));
socket_info.sin_family = AF_INET;
socket_info.sin_port = htons(port);
::memcpy(&socket_info.sin_addr,
host_addr->h_addr,
host_addr->h_length);
socket_info.sin_addr = *(struct in_addr*)host_addr->h_addr; // FIXME
if(::connect(fd, (sockaddr*)&socket_info, sizeof(struct sockaddr)) != 0)
{
::close(fd);
throw std::runtime_error("connect failed");
}
return fd;
}
bool handshake_complete(const TLS::Session& session)
{
std::cout << "Handshake complete, " << session.version().to_string()
<< " using " << session.ciphersuite().to_string() << "\n";
if(!session.session_id().empty())
std::cout << "Session ID " << hex_encode(session.session_id()) << "\n";
if(!session.session_ticket().empty())
std::cout << "Session ticket " << hex_encode(session.session_ticket()) << "\n";
return true;
}
void dgram_socket_write(int sockfd, const byte buf[], size_t length)
{
send(sockfd, buf, length, MSG_NOSIGNAL);
}
void stream_socket_write(int sockfd, const byte buf[], size_t length)
{
size_t offset = 0;
while(length)
{
ssize_t sent = ::send(sockfd, (const char*)buf + offset,
length, MSG_NOSIGNAL);
if(sent == -1)
{
if(errno == EINTR)
sent = 0;
else
throw std::runtime_error("Socket::write: Socket write failed");
}
offset += sent;
length -= sent;
}
}
bool got_alert = false;
void process_data(const byte buf[], size_t buf_size, TLS::Alert alert)
{
if(alert.is_valid())
{
std::cout << "Alert: " << alert.type_string() << "\n";
got_alert = true;
}
for(size_t i = 0; i != buf_size; ++i)
{
std::cout << buf[i];
}
}
std::string protocol_chooser(const std::vector<std::string>& protocols)
{
for(size_t i = 0; i != protocols.size(); ++i)
std::cout << "Protocol " << i << " = " << protocols[i] << "\n";
return "http/1.1";
}
int main(int argc, char* argv[])
{
if(argc != 2 && argc != 3 && argc != 4)
{
std::cout << "Usage " << argv[0] << " host [port] [udp|tcp]\n";
return 1;
}
try
{
LibraryInitializer botan_init;
AutoSeeded_RNG rng;
TLS::Policy policy;
#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
TLS::Session_Manager_SQLite session_manager("my secret passphrase",
rng,
"sessions.db");
#else
TLS::Session_Manager_In_Memory session_manager;
#endif
Credentials_Manager_Simple creds(rng);
std::string host = argv[1];
u32bit port = argc >= 3 ? Botan::to_u32bit(argv[2]) : 443;
std::string transport = argc >= 4 ? argv[3] : "tcp";
int sockfd = connect_to_host(host, port, transport);
auto socket_write =
(transport == "tcp") ?
std::bind(stream_socket_write, sockfd, _1, _2) :
std::bind(dgram_socket_write, sockfd, _1, _2);
TLS::Client client(socket_write,
process_data,
handshake_complete,
session_manager,
creds,
policy,
rng,
TLS::Server_Information(host, port),
protocol_chooser);
while(!client.is_closed())
{
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(sockfd, &readfds);
FD_SET(STDIN_FILENO, &readfds);
::select(sockfd + 1, &readfds, NULL, NULL, NULL);
if(FD_ISSET(sockfd, &readfds))
{
byte buf[4*1024] = { 0 };
ssize_t got = ::read(sockfd, buf, sizeof(buf));
if(got == 0)
{
std::cout << "EOF on socket\n";
break;
}
else if(got == -1)
{
std::cout << "Socket error: " << errno << " " << strerror(errno) << "\n";
continue;
}
//std::cout << "Socket - got " << got << " bytes\n";
client.received_data(buf, got);
}
else if(FD_ISSET(STDIN_FILENO, &readfds))
{
byte buf[1024] = { 0 };
ssize_t got = read(STDIN_FILENO, buf, sizeof(buf));
if(got == 0)
{
std::cout << "EOF on stdin\n";
client.close();
break;
}
else if(got == -1)
{
std::cout << "Stdin error: " << errno << " " << strerror(errno) << "\n";
continue;
}
if(got == 2 && buf[1] == '\n')
{
char cmd = buf[0];
if(cmd == 'R' || cmd == 'r')
{
std::cout << "Client initiated renegotiation\n";
client.renegotiate(cmd == 'R');
}
else if(cmd == 'Q')
{
std::cout << "Client initiated close\n";
client.close();
}
}
else if(buf[0] == 'H')
client.heartbeat(&buf[1], got-1);
else
client.send(buf, got);
}
}
::close(sockfd);
}
catch(std::exception& e)
{
std::cout << "Exception: " << e.what() << "\n";
return 1;
}
return 0;
}
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