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/* $OpenBSD: client.cpp,v 1.1 2020/09/15 01:45:16 bluhm Exp $ */
/*
* Copyright (c) 2019-2020 Alexander Bluhm <bluhm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <netdb.h>
#include <unistd.h>
#include <botan/tls_client.h>
#include <botan/tls_callbacks.h>
#include <botan/tls_session_manager.h>
#include <botan/tls_policy.h>
#include <botan/auto_rng.h>
#include <botan/certstor.h>
#include <iostream>
#include <string>
using namespace std;
class Callbacks : public Botan::TLS::Callbacks {
public:
Callbacks(int socket) :
m_socket(socket)
{}
void print_sockname()
{
struct sockaddr_storage ss;
char host[NI_MAXHOST], port[NI_MAXSERV];
socklen_t slen;
slen = sizeof(ss);
if (getsockname(m_socket, (struct sockaddr *)&ss, &slen) == -1)
err(1, "getsockname");
if (getnameinfo((struct sockaddr *)&ss, ss.ss_len, host,
sizeof(host), port, sizeof(port),
NI_NUMERICHOST | NI_NUMERICSERV))
errx(1, "getnameinfo");
cout <<"sock: " <<host <<" " <<port <<endl <<flush;
}
void print_peername()
{
struct sockaddr_storage ss;
char host[NI_MAXHOST], port[NI_MAXSERV];
socklen_t slen;
slen = sizeof(ss);
if (getpeername(m_socket, (struct sockaddr *)&ss, &slen) == -1)
err(1, "getpeername");
if (getnameinfo((struct sockaddr *)&ss, ss.ss_len, host,
sizeof(host), port, sizeof(port),
NI_NUMERICHOST | NI_NUMERICSERV))
errx(1, "getnameinfo");
cout <<"peer: " <<host <<" " <<port <<endl <<flush;
}
void tls_emit_data(const uint8_t data[], size_t size) override
{
size_t off = 0, len = size;
while (len > 0) {
ssize_t n;
n = send(m_socket, data + off, len, 0);
if (n < 0)
err(1, "send");
off += n;
len -= n;
}
}
void tls_record_received(uint64_t seq_no, const uint8_t data[],
size_t size) override
{
cout <<"<<< " <<string((const char *)data, size) <<flush;
string str("hello\n");
cout <<">>> " <<str <<flush;
m_channel->send(str);
m_channel->close();
}
void tls_alert(Botan::TLS::Alert alert) override
{
errx(1, "alert: %s", alert.type_string().c_str());
}
bool tls_session_established(const Botan::TLS::Session& session)
override
{
cout <<"established" <<endl <<flush;
return false;
}
void set_channel(Botan::TLS::Channel &channel) {
m_channel = &channel;
}
protected:
int m_socket = -1;
Botan::TLS::Channel *m_channel = nullptr;
};
class Credentials : public Botan::Credentials_Manager {
public:
std::vector<Botan::Certificate_Store*> trusted_certificate_authorities(
const std::string &type, const std::string &context)
override
{
std::vector<Botan::Certificate_Store*> cs { &m_ca };
return cs;
}
void add_certificate_file(const std::string &file) {
Botan::X509_Certificate cert(file);
m_ca.add_certificate(cert);
}
private:
Botan::Certificate_Store_In_Memory m_ca;
};
class Policy : public Botan::TLS::Strict_Policy {
public:
bool require_cert_revocation_info() const override {
return false;
}
};
void __dead
usage(void)
{
fprintf(stderr, "usage: client [-C CA] host port\n");
exit(2);
}
int
main(int argc, char *argv[])
{
struct addrinfo hints, *res;
int ch, s, error;
char buf[256];
char *cafile = NULL;
char *host, *port;
while ((ch = getopt(argc, argv, "C:")) != -1) {
switch (ch) {
case 'C':
cafile = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc == 2) {
host = argv[0];
port = argv[1];
} else {
usage();
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(host, port, &hints, &res);
if (error)
errx(1, "getaddrinfo: %s", gai_strerror(error));
if (res == NULL)
errx(1, "getaddrinfo empty");
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s == -1)
err(1, "socket");
if (connect(s, res->ai_addr, res->ai_addrlen) == -1)
err(1, "connect");
freeaddrinfo(res);
{
Callbacks callbacks(s);
Botan::AutoSeeded_RNG rng;
Botan::TLS::Session_Manager_In_Memory session_mgr(rng);
Credentials creds;
if (cafile != NULL)
creds.add_certificate_file(cafile);
Policy policy;
callbacks.print_sockname();
callbacks.print_peername();
Botan::TLS::Client client(callbacks, session_mgr, creds,
policy, rng);
callbacks.set_channel(client);
while (!client.is_closed()) {
ssize_t n;
n = recv(s, buf, sizeof(buf), 0);
if (n < 0)
err(1, "recv");
if (n == 0)
errx(1, "eof");
client.received_data((uint8_t *)&buf, n);
}
}
if (close(s) == -1)
err(1, "close");
cout <<"success" <<endl;
return 0;
}
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