/*
* Simple GnuTLS client used for testing.
*
* Copyright (C) 2011-2013 Simon Ruderich
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAX_REQUEST_LINE 4096
static int fdopen_read_write(int socket, FILE **read_fd, FILE **write_fd);
static int connect_to_host(const char *hostname, const char *port);
static int read_http_request(FILE *client_fd, char *request, size_t length);
#if 0
static void log_function_gnutls(int level, const char *string) {
(void)level;
fprintf(stderr, " => %s", string);
}
#endif
int main (int argc, char *argv[]) {
int result, response;
unsigned int status;
char buffer[MAX_REQUEST_LINE];
int server;
FILE *fd_read, *fd_write;
gnutls_session_t session;
gnutls_certificate_credentials_t xcred;
gnutls_x509_crt_t cert;
const gnutls_datum_t *cert_list;
unsigned int cert_list_size;
if (argc != 5 && argc != 6) {
fprintf(stderr,
"Usage: %s "
"[]\n",
argv[0]);
return EXIT_FAILURE;
}
gnutls_global_init();
gnutls_certificate_allocate_credentials(&xcred);
#if 0
gnutls_global_set_log_level(10);
gnutls_global_set_log_function(log_function_gnutls);
#endif
gnutls_certificate_set_x509_trust_file(xcred,
argv[1], GNUTLS_X509_FMT_PEM);
gnutls_init(&session, GNUTLS_CLIENT);
gnutls_priority_set_direct(session, "NORMAL", NULL);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
server = connect_to_host("localhost", "4711");
if (server == -1) {
return EXIT_FAILURE;
}
if (fdopen_read_write(server, &fd_read, &fd_write) != 0) {
return EXIT_FAILURE;
}
/* Talk to tlsproxy. */
fprintf(fd_write, "CONNECT %s:%s HTTP/1.0\r\n", argv[2], argv[3]);
if (argc == 6) {
fprintf(fd_write, "Proxy-Authorization: Basic %s\r\n", argv[5]);
}
fprintf(fd_write, "\r\n");
fflush(fd_write);
if (read_http_request(fd_read, buffer, sizeof(buffer)) == -1) {
fprintf(stderr, "invalid proxy response\n");
return EXIT_FAILURE;
}
printf("response: %s\n", buffer);
if (sscanf(buffer, "HTTP/1.0 %d", &response) != 1) {
fprintf(stderr, "invalid proxy response: %s\n", buffer);
return EXIT_FAILURE;
}
if (response != 200) {
fprintf(stderr, "proxy failure\n");
return EXIT_FAILURE;
}
#ifdef HAVE_GNUTLS_TRANSPORT_SET_INT2
/* gnutls_transport_set_int() is a macro. */
gnutls_transport_set_int(session, server);
#else
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t)server);
#endif
result = gnutls_handshake(session);
if (result != GNUTLS_E_SUCCESS) {
fprintf(stderr, "gnutls_handshake() failed\n");
gnutls_perror(result);
return EXIT_FAILURE;
}
/* Verify the proxy certificate. */
result = gnutls_certificate_verify_peers2(session, &status);
if (result < 0) {
fprintf(stderr, "gnutls_certificate_verify_peers2() failed\n");
gnutls_perror(result);
return EXIT_FAILURE;
}
if (status & GNUTLS_CERT_INVALID) {
fprintf(stderr, "certificate invalid\n");
}
/* Get proxy certificate. */
if ((result = gnutls_x509_crt_init(&cert)) < 0) {
fprintf(stderr, "gnutls_x509_crt_init() failed");
gnutls_perror(result);
return EXIT_FAILURE;
}
cert_list = gnutls_certificate_get_peers(session, &cert_list_size);
if (cert_list == NULL) {
fprintf(stderr, "gnutls_certificate_get_peers() failed");
return EXIT_FAILURE;
}
if ((result = gnutls_x509_crt_import(cert, &cert_list[0],
GNUTLS_X509_FMT_DER)) < 0) {
fprintf(stderr, "gnutls_x509_crt_import() failed");
gnutls_perror(result);
return EXIT_FAILURE;
}
/* Check hostname. */
if (!gnutls_x509_crt_check_hostname(cert, argv[4])) {
fprintf(stderr, "hostname didn't match '%s'\n", argv[4]);
return EXIT_FAILURE;
}
gnutls_x509_crt_deinit(cert);
/* Send a bogus request to the server. Otherwise recent gnutls-serv won't
* terminate the connection when gnutls_bye() is used. */
gnutls_record_send(session, "GET / HTTP/1.0\r\n\r\n",
strlen("GET / HTTP/1.0\r\n\r\n"));
gnutls_bye(session, GNUTLS_SHUT_RDWR);
fclose(fd_read);
fclose(fd_write);
gnutls_deinit(session);
gnutls_certificate_free_credentials(xcred);
gnutls_global_deinit();
return EXIT_SUCCESS;
}
/* Copied from src/connection.c (and removed LOG_* stuff)! Don't modify. */
static int fdopen_read_write(int socket, FILE **read_fd, FILE **write_fd) {
*read_fd = fdopen(socket, "r");
if (*read_fd == NULL) {
perror("fdopen_read_write(): fdopen(\"r\") failed");
return -1;
}
*write_fd = fdopen(dup(socket), "w");
if (*write_fd == NULL) {
perror("fdopen_read_write(): fdopen(\"w\") failed");
fclose(*read_fd);
*read_fd = NULL; /* "tell" caller read_fd is already closed */
return -1;
}
return 0;
}
static int connect_to_host(const char *hostname, const char *port) {
struct addrinfo gai_hints;
struct addrinfo *gai_result;
int gai_return;
int server_socket;
struct addrinfo *server;
if (hostname == NULL || port == NULL) {
return -1;
}
/* Get IP of hostname server. */
memset(&gai_hints, 0, sizeof(gai_hints));
gai_hints.ai_family = AF_UNSPEC;
gai_hints.ai_socktype = SOCK_STREAM;
gai_hints.ai_protocol = 0;
gai_hints.ai_flags = AI_NUMERICSERV /* given port is numeric */
| AI_ADDRCONFIG /* supported by this computer */
| AI_V4MAPPED; /* support IPv4 through IPv6 */
gai_return = getaddrinfo(hostname, port, &gai_hints, &gai_result);
if (gai_return != 0) {
if (gai_return == EAI_SYSTEM) {
perror("connect_to_host(): getaddrinfo()");
} else {
fprintf(stderr, "connect_to_host(): getaddrinfo(): %s",
gai_strerror(gai_return));
}
return -1;
}
/* Now try to connect to each server returned by getaddrinfo(), use the
* first successful connect. */
for (server = gai_result; server != NULL; server = server->ai_next) {
server_socket = socket(server->ai_family,
server->ai_socktype,
server->ai_protocol);
if (server_socket < 0) {
perror("connect_to_host(): socket(), trying next");
continue;
}
if (connect(server_socket, server->ai_addr, server->ai_addrlen) == 0) {
break;
}
perror("connect_to_host(): connect(), trying next");
close(server_socket);
}
/* Make sure we free the result from getaddrinfo(). */
freeaddrinfo(gai_result);
if (server == NULL) {
perror("connect_to_host(): no server found, abort");
return -1;
}
return server_socket;
}
static int read_http_request(FILE *client_fd, char *request, size_t length) {
char buffer[MAX_REQUEST_LINE];
if (fgets(request, (int)length, client_fd) == NULL) {
if (ferror(client_fd)) {
perror("read_http_request(): fgets()");
return -1;
}
/* EOF */
return -2;
}
while (fgets(buffer, sizeof(buffer), client_fd) != NULL) {
/* End of header. */
if (!strcmp(buffer, "\n") || !strcmp(buffer, "\r\n")) {
break;
}
}
if (ferror(client_fd)) {
perror("read_http_request(): fgets()");
return -1;
}
return 0;
}