--- /dev/null
+/*
+ * Copyright (C) 2008 Free Software Foundation
+ *
+ * Author: Simon Josefsson
+ *
+ * This file is part of GNUTLS.
+ *
+ * GNUTLS 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.
+ *
+ * GNUTLS 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 GNUTLS; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <gnutls/gnutls.h>
+
+#include "utils.h"
+
+static void
+tls_log_func (int level, const char *str)
+{
+ fprintf (stderr, "|<%d>| %s", level, str);
+}
+
+static int handshake = 0;
+
+char *to_server;
+size_t to_server_len;
+
+char *to_client;
+size_t to_client_len;
+
+
+static ssize_t
+client_pull (gnutls_transport_ptr_t tr, void *data, size_t len)
+{
+// success ("client_pull len %d has %d\n", len, to_client_len);
+ unsigned char rnd;
+ gcry_create_nonce (&rnd, 1);
+
+ if (handshake == 0 && rnd % 2 == 0)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+
+ if (to_client_len < len)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+
+ memcpy (data, to_client, len);
+
+ memmove (to_client, to_client + len, to_client_len - len);
+ to_client_len -= len;
+
+ return len;
+}
+
+static ssize_t
+client_push (gnutls_transport_ptr_t tr, const void *data, size_t len)
+{
+ unsigned char rnd;
+ char *tmp;
+
+#if 0
+ gcry_create_nonce (&rnd, 1);
+ if (handshake == 0 && rnd % 2 == 0)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+#endif
+ size_t newlen = to_server_len + len;
+// success ("client_push len %d has %d\n", len, to_server_len);
+// hexprint (data, len);
+
+ tmp = realloc (to_server, newlen);
+ if (!tmp)
+ {
+ fail ("Memory allocation failure...\n");
+ exit (1);
+ }
+ to_server = tmp;
+
+ memcpy (to_server + to_server_len, data, len);
+ to_server_len = newlen;
+
+ return len;
+}
+
+static ssize_t
+server_pull (gnutls_transport_ptr_t tr, void *data, size_t len)
+{
+ //success ("server_pull len %d has %d\n", len, to_server_len);
+ unsigned char rnd;
+
+ gcry_create_nonce (&rnd, 1);
+ if (handshake == 0 && rnd % 2 == 0)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+
+ if (to_server_len < len)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+
+ memcpy (data, to_server, len);
+
+ memmove (to_server, to_server + len, to_server_len - len);
+ to_server_len -= len;
+
+ return len;
+}
+
+static ssize_t
+server_push (gnutls_transport_ptr_t tr, const void *data, size_t len)
+{
+ unsigned char rnd;
+ char *tmp;
+
+ //success ("server_push len %d has %d\n", len, to_client_len);
+ gcry_create_nonce (&rnd, 1);
+ if (handshake == 0 && rnd % 2 == 0)
+ {
+ gnutls_transport_set_global_errno (EAGAIN);
+ return -1;
+ }
+
+ size_t newlen = to_client_len + len;
+// hexprint (data, len);
+
+ tmp = realloc (to_client, newlen);
+ if (!tmp)
+ {
+ fail ("Memory allocation failure...\n");
+ exit (1);
+ }
+ to_client = tmp;
+
+ memcpy (to_client + to_client_len, data, len);
+ to_client_len = newlen;
+
+ return len;
+}
+
+#define MAX_BUF 1024
+#define MSG "Hello TLS"
+
+void
+doit (void)
+{
+ /* Server stuff. */
+ gnutls_anon_server_credentials_t s_anoncred;
+ const gnutls_datum_t p3 = { (char*) pkcs3, strlen (pkcs3) };
+ static gnutls_dh_params_t dh_params;
+ gnutls_session_t server;
+ int sret = GNUTLS_E_AGAIN;
+ /* Client stuff. */
+ gnutls_anon_client_credentials_t c_anoncred;
+ gnutls_session_t client;
+ int n, cret = GNUTLS_E_AGAIN;
+ /* Need to enable anonymous KX specifically. */
+ const int kx_prio[] = { GNUTLS_KX_ANON_DH, 0 };
+ char buffer[MAX_BUF + 1];
+ ssize_t ns;
+ int ret, transferred = 0;
+
+ /* General init. */
+ gnutls_global_init ();
+ gnutls_global_set_log_function (tls_log_func);
+ if (debug)
+ gnutls_global_set_log_level (99);
+
+ /* Init server */
+ gnutls_anon_allocate_server_credentials (&s_anoncred);
+ gnutls_dh_params_init (&dh_params);
+ gnutls_dh_params_import_pkcs3 (dh_params, &p3, GNUTLS_X509_FMT_PEM);
+ gnutls_anon_set_server_dh_params (s_anoncred, dh_params);
+ gnutls_init (&server, GNUTLS_SERVER);
+ gnutls_set_default_priority (server);
+ gnutls_kx_set_priority (server, kx_prio);
+ gnutls_credentials_set (server, GNUTLS_CRD_ANON, s_anoncred);
+ gnutls_dh_set_prime_bits (server, 1024);
+ gnutls_transport_set_push_function (server, server_push);
+ gnutls_transport_set_pull_function (server, server_pull);
+
+ /* Init client */
+ gnutls_anon_allocate_client_credentials (&c_anoncred);
+ gnutls_init (&client, GNUTLS_CLIENT);
+ gnutls_set_default_priority (client);
+ gnutls_kx_set_priority (client, kx_prio);
+ gnutls_credentials_set (client, GNUTLS_CRD_ANON, c_anoncred);
+ gnutls_transport_set_push_function (client, client_push);
+ gnutls_transport_set_pull_function (client, client_pull);
+
+ handshake = 1;
+ do
+ {
+ if (cret == GNUTLS_E_AGAIN)
+ {
+ //success ("loop invoking client:\n");
+ cret = gnutls_handshake (client);
+ //success ("client %d: %s\n", cret, gnutls_strerror (cret));
+ }
+
+ if (sret == GNUTLS_E_AGAIN)
+ {
+ //success ("loop invoking server:\n");
+ sret = gnutls_handshake (server);
+ //success ("server %d: %s\n", sret, gnutls_strerror (sret));
+ }
+ }
+ while (cret == GNUTLS_E_AGAIN || sret == GNUTLS_E_AGAIN);
+ handshake = 0;
+ success ("Handshake established\n");
+
+ ns = gnutls_record_send (client, MSG, strlen (MSG));
+ //success ("client: sent %d\n", ns);
+
+ do
+ {
+ //success("transferred: %d\n", transferred);
+
+ ret = gnutls_record_recv (server, buffer, MAX_BUF);
+ if (ret == 0)
+ fail ("server: didn't receive any data\n");
+ else if (ret < 0)
+ {
+ if (ret != GNUTLS_E_AGAIN) {
+ fail ("server: error: %s\n", gnutls_strerror (ret));
+ break;
+ }
+ }
+ else
+ {
+ transferred+=ret;
+ fputs ("*", stdout);
+ }
+
+ ns = gnutls_record_send (server, MSG, strlen (MSG));
+ //success ("server: sent %d\n", ns);
+
+ ret = gnutls_record_recv (client, buffer, MAX_BUF);
+ if (ret == 0)
+ {
+ fail ("client: Peer has closed the TLS connection\n");
+ }
+ else if (ret < 0)
+ {
+ if (ret != GNUTLS_E_AGAIN) {
+ fail ("client: Error: %s\n", gnutls_strerror (ret));
+ break;
+ }
+ }
+ else
+ {
+ transferred+=ret;
+ fputs (".", stdout);
+ }
+ }
+ while (transferred < 55000);
+ fputs ("\n", stdout);
+
+ gnutls_bye (client, GNUTLS_SHUT_RDWR);
+ gnutls_bye (server, GNUTLS_SHUT_RDWR);
+
+ gnutls_deinit (client);
+ gnutls_deinit (server);
+
+ free (to_server);
+ free (to_client);
+
+ gnutls_anon_free_client_credentials (c_anoncred);
+ gnutls_anon_free_server_credentials (s_anoncred);
+
+ gnutls_dh_params_deinit (dh_params);
+
+ gnutls_global_deinit ();
+}
projects / thirdparty / gnutls.git / commitdiff
