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Diffstat (limited to 'tests/tls13/key_update_multiple.c')
| -rw-r--r-- | tests/tls13/key_update_multiple.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/tests/tls13/key_update_multiple.c b/tests/tls13/key_update_multiple.c new file mode 100644 index 0000000..8b2c2db --- /dev/null +++ b/tests/tls13/key_update_multiple.c @@ -0,0 +1,232 @@ +/* + * Copyright (C) 2017-2019 Red Hat, Inc. + * + * Author: Daiki Ueno + * + * 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 Lesser General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/> + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <gnutls/gnutls.h> +#include <gnutls/crypto.h> +#include <assert.h> +#include "cert-common.h" + +#include "utils.h" +#include "virt-time.h" +#define RANDOMIZE +#include "eagain-common.h" + +const char *side = ""; + +/* This program tests whether multiple key update messages are handled + * properly with rate-limit. */ + +static void tls_log_func(int level, const char *str) +{ + fprintf(stderr, "%s|<%d>| %s", side, level, str); +} + +#define MAX_BUF 1024 +#define MSG "Hello TLS, and hi and how are you and more data here... and more... and even more and even more more data..." + +/* These must match the definitions in lib/tls13/key_update.c. */ +#define KEY_UPDATES_WINDOW 1000 +#define KEY_UPDATES_PER_WINDOW 8 + +static unsigned key_update_msg_inc = 0; +static unsigned key_update_msg_out = 0; + +static int hsk_callback(gnutls_session_t session, unsigned int htype, + unsigned post, unsigned int incoming, const gnutls_datum_t *msg) +{ + assert(post == GNUTLS_HOOK_PRE); + + assert(msg->size == 1); + + if (htype == GNUTLS_HANDSHAKE_KEY_UPDATE) { + if (incoming) + key_update_msg_inc++; + else + key_update_msg_out++; + } + + return 0; +} + +static void run(const char *name, bool exceed_limit) +{ + /* Server stuff. */ + gnutls_certificate_credentials_t ccred; + gnutls_certificate_credentials_t scred; + gnutls_session_t server; + int sret, cret; + /* Client stuff. */ + gnutls_session_t client; + /* Need to enable anonymous KX specifically. */ + char buffer[MAX_BUF + 1]; + int ret, transferred = 0; + size_t i; + + success("%s\n", name); + + /* General init. */ + global_init(); + gnutls_global_set_log_function(tls_log_func); + if (debug) + gnutls_global_set_log_level(9); + + /* Init server */ + assert(gnutls_certificate_allocate_credentials(&scred) >= 0); + assert(gnutls_certificate_set_x509_key_mem(scred, + &server_ca3_localhost_cert, + &server_ca3_key, + GNUTLS_X509_FMT_PEM) >= 0); + + assert(gnutls_init(&server, GNUTLS_SERVER) >= 0); + ret = + gnutls_priority_set_direct(server, + "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", + NULL); + if (ret < 0) + exit(1); + + gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, scred); + gnutls_transport_set_push_function(server, server_push); + gnutls_transport_set_pull_function(server, server_pull); + gnutls_transport_set_ptr(server, server); + + /* Init client */ + assert(gnutls_certificate_allocate_credentials(&ccred) >= 0); + assert(gnutls_certificate_set_x509_trust_mem + (ccred, &ca3_cert, GNUTLS_X509_FMT_PEM) >= 0); + + gnutls_init(&client, GNUTLS_CLIENT); + ret = + gnutls_priority_set_direct(client, + "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", + NULL); + assert(ret >= 0); + + ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE, ccred); + if (ret < 0) + exit(1); + + gnutls_transport_set_push_function(client, client_push); + gnutls_transport_set_pull_function(client, client_pull); + gnutls_transport_set_ptr(client, client); + + + HANDSHAKE(client, server); + if (debug) + success("Handshake established\n"); + + key_update_msg_inc = 0; + key_update_msg_out = 0; + + gnutls_handshake_set_hook_function(client, -1, GNUTLS_HOOK_PRE, hsk_callback); + + /* schedule multiple key updates */ + for (i = 0; i < KEY_UPDATES_PER_WINDOW; i++) { + do { + ret = gnutls_session_key_update(client, 1); + } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED); + if (ret < 0) + fail("error in key update: %s\n", gnutls_strerror(ret)); + } + + /* server receives the client key update and sends data */ + TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF); + TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF); + EMPTY_BUF(server, client, buffer, MAX_BUF); + + if (key_update_msg_out != KEY_UPDATES_PER_WINDOW) + fail("unexpected number of key updates are sent: %d\n", + key_update_msg_out); + else { + if (debug) + success("successfully sent %d key updates\n", + KEY_UPDATES_PER_WINDOW); + } + if (key_update_msg_inc != 1) + fail("unexpected number of key updates received: %d\n", + key_update_msg_inc); + else { + if (debug) + success("successfully received 1 key update\n"); + } + + if (exceed_limit) { + /* excessive key update in the same time window should + * be rejected by the peer */ + do { + ret = gnutls_session_key_update(client, 1); + } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED); + + /* server receives the client key update and sends data */ + ret = record_send_loop(client, MSG, strlen(MSG), 0); + assert(ret == strlen(MSG)); + ret = gnutls_record_recv(server, buffer, MAX_BUF); + if (ret != GNUTLS_E_TOO_MANY_HANDSHAKE_PACKETS) + fail("server didn't reject excessive number of key updates\n"); + else { + if (debug) + success("server rejected excessive number of key updates\n"); + } + } else { + virt_sec_sleep(KEY_UPDATES_WINDOW / 1000 + 1); + + /* the time window should be rolled over now */ + do { + ret = gnutls_session_key_update(client, 1); + } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED); + if (ret < 0) + fail("error in key update: %s\n", gnutls_strerror(ret)); + + /* server receives the client key update and sends data */ + TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF); + TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF); + EMPTY_BUF(server, client, buffer, MAX_BUF); + } + + gnutls_bye(client, GNUTLS_SHUT_WR); + gnutls_bye(server, GNUTLS_SHUT_WR); + + gnutls_deinit(client); + gnutls_deinit(server); + + gnutls_certificate_free_credentials(scred); + gnutls_certificate_free_credentials(ccred); + + gnutls_global_deinit(); + reset_buffers(); +} + +void doit(void) +{ + virt_time_init(); + + run("not exceeding limit", 0); + run("exceeding limit", 1); +} |