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-rw-r--r--tests/resume-dtls.c587
1 files changed, 587 insertions, 0 deletions
diff --git a/tests/resume-dtls.c b/tests/resume-dtls.c
new file mode 100644
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--- /dev/null
+++ b/tests/resume-dtls.c
@@ -0,0 +1,587 @@
+/*
+ * Copyright (C) 2004-2012 Free Software Foundation, Inc.
+ * Copyright (C) 2013 Adam Sampson <ats@offog.org>
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * 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
+ */
+
+/* Parts copied from GnuTLS example programs. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+int main(int argc, char **argv)
+{
+ exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if !defined(_WIN32)
+#include <sys/wait.h>
+#endif
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+#include "utils.h"
+
+static void wrap_db_init(void);
+static void wrap_db_deinit(void);
+static int wrap_db_store(void *dbf, gnutls_datum_t key,
+ gnutls_datum_t data);
+static gnutls_datum_t wrap_db_fetch(void *dbf, gnutls_datum_t key);
+static int wrap_db_delete(void *dbf, gnutls_datum_t key);
+
+#define TLS_SESSION_CACHE 50
+
+struct params_res {
+ const char *desc;
+ int enable_db;
+ int enable_session_ticket_server;
+ int enable_session_ticket_client;
+ int expect_resume;
+};
+
+pid_t child;
+
+struct params_res resume_tests[] = {
+ {"try to resume from db", 50, 0, 0, 1},
+ {"try to resume from session ticket", 0, 1, 1, 1},
+ {"try to resume from session ticket (server only)", 0, 1, 0, 0},
+ {"try to resume from session ticket (client only)", 0, 0, 1, 0},
+ {NULL, -1}
+};
+
+/* A very basic TLS client, with anonymous authentication.
+ */
+
+#define SESSIONS 2
+#define MAX_BUF 5*1024
+#define MSG "Hello TLS"
+
+static void tls_log_func(int level, const char *str)
+{
+ fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,
+ str);
+}
+
+static void client(int sds[], struct params_res *params)
+{
+ int ret, ii;
+ gnutls_session_t session;
+ char buffer[MAX_BUF + 1];
+ gnutls_anon_client_credentials_t anoncred;
+ /* Need to enable anonymous KX specifically. */
+
+ /* variables used in session resuming
+ */
+ int t;
+ gnutls_datum_t session_data;
+
+ if (debug) {
+ gnutls_global_set_log_function(tls_log_func);
+ gnutls_global_set_log_level(3);
+ }
+ global_init();
+
+ gnutls_anon_allocate_client_credentials(&anoncred);
+
+ for (t = 0; t < SESSIONS; t++) {
+ int sd = sds[t];
+
+ /* Initialize TLS session
+ */
+ gnutls_init(&session,
+ GNUTLS_CLIENT | GNUTLS_DATAGRAM);
+
+ /* Use default priorities */
+ if (params->enable_session_ticket_client)
+ gnutls_priority_set_direct(session,
+ "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH",
+ NULL);
+ else
+ gnutls_priority_set_direct(session,
+ "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH:%NO_TICKETS",
+ NULL);
+
+ /* put the anonymous credentials to the current session
+ */
+ gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+
+ if (t > 0) {
+ /* if this is not the first time we connect */
+ gnutls_session_set_data(session, session_data.data,
+ session_data.size);
+ gnutls_free(session_data.data);
+ }
+
+ gnutls_transport_set_int(session, sd);
+
+ /* Perform the TLS handshake
+ */
+ gnutls_dtls_set_timeouts(session, get_dtls_retransmit_timeout(), get_timeout());
+ do {
+ ret = gnutls_handshake(session);
+ } while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+ if (ret < 0) {
+ gnutls_perror(ret);
+ fail("client: Handshake failed\n");
+ goto end;
+ } else {
+ if (debug)
+ success
+ ("client: Handshake was completed\n");
+ }
+
+ if (t == 0) { /* the first time we connect */
+ /* get the session data size */
+ ret =
+ gnutls_session_get_data2(session,
+ &session_data);
+ if (ret < 0)
+ fail("Getting resume data failed\n");
+ } else { /* the second time we connect */
+
+ /* check if we actually resumed the previous session */
+ if (gnutls_session_is_resumed(session) != 0) {
+ if (params->expect_resume) {
+ if (debug)
+ success
+ ("- Previous session was resumed\n");
+ } else
+ fail("- Previous session was resumed\n");
+ } else {
+ if (params->expect_resume) {
+ fail("*** Previous session was NOT resumed\n");
+ } else {
+ if (debug)
+ success
+ ("*** Previous session was NOT resumed (expected)\n");
+ }
+ }
+ }
+
+ gnutls_record_send(session, MSG, strlen(MSG));
+
+ ret = gnutls_record_recv(session, buffer, MAX_BUF);
+ if (ret == 0) {
+ if (debug)
+ success
+ ("client: Peer has closed the TLS connection\n");
+ goto end;
+ } else if (ret < 0) {
+ fail("client: Error: %s\n", gnutls_strerror(ret));
+ goto end;
+ }
+
+ if (debug) {
+ printf("- Received %d bytes: ", ret);
+ for (ii = 0; ii < ret; ii++) {
+ fputc(buffer[ii], stdout);
+ }
+ fputs("\n", stdout);
+ }
+
+ gnutls_bye(session, GNUTLS_SHUT_RDWR);
+
+ close(sd);
+
+ gnutls_deinit(session);
+ }
+
+ end:
+ gnutls_anon_free_client_credentials(anoncred);
+}
+
+/* This is a sample TLS 1.0 echo server, for anonymous authentication only.
+ */
+
+#define DH_BITS 1024
+
+/* These are global */
+
+static gnutls_dh_params_t dh_params;
+
+static int generate_dh_params(void)
+{
+ const gnutls_datum_t p3 = { (void *) pkcs3, strlen(pkcs3) };
+ /* Generate Diffie-Hellman parameters - for use with DHE
+ * kx algorithms. These should be discarded and regenerated
+ * once a day, once a week or once a month. Depending on the
+ * security requirements.
+ */
+ gnutls_dh_params_init(&dh_params);
+ return gnutls_dh_params_import_pkcs3(dh_params, &p3,
+ GNUTLS_X509_FMT_PEM);
+}
+
+static char buffer[MAX_BUF + 1];
+
+static void global_stop(void)
+{
+ if (debug)
+ success("global stop\n");
+
+ gnutls_dh_params_deinit(dh_params);
+
+ gnutls_global_deinit();
+}
+
+static void server(int sds[], struct params_res *params)
+{
+ gnutls_anon_server_credentials_t anoncred;
+ static gnutls_datum_t session_ticket_key = { NULL, 0 };
+ int ret;
+ size_t t;
+ gnutls_session_t session;
+
+ /* this must be called once in the program, it is mostly for the server.
+ */
+ if (debug) {
+ gnutls_global_set_log_function(tls_log_func);
+ gnutls_global_set_log_level(3);
+ }
+
+ global_init();
+ gnutls_anon_allocate_server_credentials(&anoncred);
+
+ if (debug)
+ success("Launched, generating DH parameters...\n");
+
+ gnutls_anon_set_server_dh_params(anoncred, dh_params);
+
+ if (params->enable_db) {
+ wrap_db_init();
+ }
+
+ if (params->enable_session_ticket_server)
+ gnutls_session_ticket_key_generate(&session_ticket_key);
+
+ for (t = 0; t < SESSIONS; t++) {
+ int sd = sds[t];
+
+ gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
+
+ gnutls_priority_set_direct(session,
+ "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH",
+ NULL);
+
+ gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+ gnutls_dh_set_prime_bits(session, DH_BITS);
+
+ if (params->enable_db) {
+ gnutls_db_set_retrieve_function(session, wrap_db_fetch);
+ gnutls_db_set_remove_function(session, wrap_db_delete);
+ gnutls_db_set_store_function(session, wrap_db_store);
+ gnutls_db_set_ptr(session, NULL);
+ }
+
+ if (params->enable_session_ticket_server)
+ gnutls_session_ticket_enable_server(session,
+ &session_ticket_key);
+
+ gnutls_transport_set_int(session, sd);
+ gnutls_dtls_set_timeouts(session, get_dtls_retransmit_timeout(), get_timeout());
+
+ do {
+ ret = gnutls_handshake(session);
+ } while (ret < 0 && (ret == GNUTLS_E_INTERRUPTED||ret == GNUTLS_E_AGAIN));
+ if (ret < 0) {
+ close(sd);
+ gnutls_deinit(session);
+ kill(child, SIGTERM);
+ fail("server: Handshake has failed (%s)\n\n",
+ gnutls_strerror(ret));
+ return;
+ }
+ if (debug)
+ success("server: Handshake was completed\n");
+
+ /* see the Getting peer's information example */
+ /* print_info(session); */
+
+ for (;;) {
+ memset(buffer, 0, MAX_BUF + 1);
+ ret = gnutls_record_recv(session, buffer, MAX_BUF);
+
+ if (ret == 0) {
+ if (debug)
+ success
+ ("server: Peer has closed the GnuTLS connection\n");
+ break;
+ } else if (ret < 0) {
+ kill(child, SIGTERM);
+ fail("server: Received corrupted data(%d). Closing...\n", ret);
+ break;
+ } else if (ret > 0) {
+ /* echo data back to the client
+ */
+ gnutls_record_send(session, buffer,
+ strlen(buffer));
+ }
+ }
+ /* do not wait for the peer to close the connection.
+ */
+ gnutls_bye(session, GNUTLS_SHUT_WR);
+
+ close(sd);
+
+ gnutls_deinit(session);
+ }
+
+ if (params->enable_db) {
+ wrap_db_deinit();
+ }
+
+ gnutls_free(session_ticket_key.data);
+ gnutls_anon_free_server_credentials(anoncred);
+
+ if (debug)
+ success("server: finished\n");
+}
+
+void doit(void)
+{
+ int i, err;
+
+ signal(SIGCHLD, SIG_IGN);
+ signal(SIGPIPE, SIG_IGN);
+
+ generate_dh_params();
+
+ for (i = 0; resume_tests[i].desc; i++) {
+ int client_sds[SESSIONS], server_sds[SESSIONS];
+ int j;
+
+ printf("%s\n", resume_tests[i].desc);
+
+ for (j = 0; j < SESSIONS; j++) {
+ int sockets[2];
+
+ err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
+ if (err == -1) {
+ perror("socketpair");
+ fail("socketpair failed\n");
+ return;
+ }
+
+ server_sds[j] = sockets[0];
+ client_sds[j] = sockets[1];
+ }
+
+ child = fork();
+ if (child < 0) {
+ perror("fork");
+ fail("fork");
+ return;
+ }
+
+ if (child) {
+ int status = 0;
+ /* parent */
+ for (j = 0; j < SESSIONS; j++)
+ close(client_sds[j]);
+ server(server_sds, &resume_tests[i]);
+ wait(&status);
+ check_wait_status(status);
+ } else {
+ for (j = 0; j < SESSIONS; j++)
+ close(server_sds[j]);
+ client(client_sds, &resume_tests[i]);
+ gnutls_global_deinit();
+ exit(0);
+ }
+ }
+ global_stop();
+}
+
+/* Functions and other stuff needed for session resuming.
+ * This is done using a very simple list which holds session ids
+ * and session data.
+ */
+
+#define MAX_SESSION_ID_SIZE 32
+#define MAX_SESSION_DATA_SIZE 1024
+
+typedef struct {
+ unsigned char session_id[MAX_SESSION_ID_SIZE];
+ unsigned int session_id_size;
+
+ char session_data[MAX_SESSION_DATA_SIZE];
+ int session_data_size;
+} CACHE;
+
+static CACHE *cache_db;
+static int cache_db_ptr = 0;
+
+static void wrap_db_init(void)
+{
+
+ /* allocate cache_db */
+ cache_db = calloc(1, TLS_SESSION_CACHE * sizeof(CACHE));
+}
+
+static void wrap_db_deinit(void)
+{
+ free(cache_db);
+ cache_db = NULL;
+ return;
+}
+
+static int
+wrap_db_store(void *dbf, gnutls_datum_t key, gnutls_datum_t data)
+{
+ if (debug)
+ success("resume db storing... (%d-%d)\n", key.size,
+ data.size);
+
+ if (debug) {
+ unsigned int i;
+ printf("key:\n");
+ for (i = 0; i < key.size; i++) {
+ printf("%02x ", key.data[i] & 0xFF);
+ if ((i + 1) % 16 == 0)
+ printf("\n");
+ }
+ printf("\n");
+ printf("data:\n");
+ for (i = 0; i < data.size; i++) {
+ printf("%02x ", data.data[i] & 0xFF);
+ if ((i + 1) % 16 == 0)
+ printf("\n");
+ }
+ printf("\n");
+ }
+
+ if (cache_db == NULL)
+ return -1;
+
+ if (key.size > MAX_SESSION_ID_SIZE)
+ return -1;
+
+ if (data.size > MAX_SESSION_DATA_SIZE)
+ return -1;
+
+ memcpy(cache_db[cache_db_ptr].session_id, key.data, key.size);
+ cache_db[cache_db_ptr].session_id_size = key.size;
+
+ memcpy(cache_db[cache_db_ptr].session_data, data.data, data.size);
+ cache_db[cache_db_ptr].session_data_size = data.size;
+
+ cache_db_ptr++;
+ cache_db_ptr %= TLS_SESSION_CACHE;
+
+ return 0;
+}
+
+static gnutls_datum_t wrap_db_fetch(void *dbf, gnutls_datum_t key)
+{
+ gnutls_datum_t res = { NULL, 0 };
+ unsigned i;
+
+ if (debug)
+ success("resume db fetch... (%d)\n", key.size);
+ if (debug) {
+ printf("key:\n");
+ for (i = 0; i < key.size; i++) {
+ printf("%02x ", key.data[i] & 0xFF);
+ if ((i + 1) % 16 == 0)
+ printf("\n");
+ }
+ printf("\n");
+ }
+
+ if (cache_db == NULL)
+ return res;
+
+ for (i = 0; i < TLS_SESSION_CACHE; i++) {
+ if (key.size == cache_db[i].session_id_size &&
+ memcmp(key.data, cache_db[i].session_id,
+ key.size) == 0) {
+ if (debug)
+ success
+ ("resume db fetch... return info\n");
+
+ res.size = cache_db[i].session_data_size;
+
+ res.data = gnutls_malloc(res.size);
+ if (res.data == NULL)
+ return res;
+
+ memcpy(res.data, cache_db[i].session_data,
+ res.size);
+
+ if (debug) {
+ unsigned j;
+ printf("data:\n");
+ for (j = 0; j < res.size; j++) {
+ printf("%02x ",
+ res.data[j] & 0xFF);
+ if ((j + 1) % 16 == 0)
+ printf("\n");
+ }
+ printf("\n");
+ }
+
+ return res;
+ }
+ }
+
+ if (debug)
+ success("resume db fetch... NOT FOUND\n");
+ return res;
+}
+
+static int wrap_db_delete(void *dbf, gnutls_datum_t key)
+{
+ int i;
+
+ if (cache_db == NULL)
+ return -1;
+
+ for (i = 0; i < TLS_SESSION_CACHE; i++) {
+ if (key.size == cache_db[i].session_id_size &&
+ memcmp(key.data, cache_db[i].session_id,
+ key.size) == 0) {
+
+ cache_db[i].session_id_size = 0;
+ cache_db[i].session_data_size = 0;
+
+ return 0;
+ }
+ }
+
+ return -1;
+
+}
+
+#endif /* _WIN32 */
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