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Diffstat (limited to 'tests/tls-record-size-limit.c')
| -rw-r--r-- | tests/tls-record-size-limit.c | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/tests/tls-record-size-limit.c b/tests/tls-record-size-limit.c new file mode 100644 index 0000000000..7a56c0ec64 --- /dev/null +++ b/tests/tls-record-size-limit.c @@ -0,0 +1,434 @@ +/* + * Copyright (C) 2015 Red Hat, Inc. + * + * 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 + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <assert.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <gnutls/gnutls.h> +#include "utils.h" + +#define SKIP16(pos, total) { \ + uint16_t _s; \ + if (pos+2 > total) fail("error\n"); \ + _s = (msg->data[pos] << 8) | msg->data[pos+1]; \ + if ((size_t)(pos+2+_s) > total) fail("error\n"); \ + pos += 2+_s; \ + } + +#define SKIP8(pos, total) { \ + uint8_t _s; \ + if (pos+1 > total) fail("error\n"); \ + _s = msg->data[pos]; \ + if ((size_t)(pos+1+_s) > total) fail("error\n"); \ + pos += 1+_s; \ + } + +#define HANDSHAKE_SESSION_ID_POS 34 + +static size_t max_record_size; + +#define SERVER_PUSH_ADD if (len > max_record_size + 5+32) fail("max record set to %d, len: %d\n", (int)max_record_size, (int)len); +#include "eagain-common.h" + +#include "cert-common.h" + +/* This tests whether the max-record extension is respected on TLS. + */ + +const char *side; + +static void tls_log_func(int level, const char *str) +{ + fprintf(stderr, "%s|<%d>| %s", side, level, str); +} + +struct handshake_cb_data_st { + gnutls_session_t session; + bool found_max_record_size; + bool found_record_size_limit; +}; + +static struct handshake_cb_data_st server_handshake_cb_data; +static struct handshake_cb_data_st client_handshake_cb_data; + +static int ext_callback(void *ctx, unsigned tls_id, const unsigned char *data, unsigned size) +{ + struct handshake_cb_data_st *cb_data = ctx; + if (tls_id == 1) { /* max record size */ + cb_data->found_max_record_size = 1; + } else if (tls_id == 28) { /* record size limit */ + cb_data->found_record_size_limit = 1; + } + return 0; +} + +static int handshake_callback(gnutls_session_t session, unsigned int htype, + unsigned post, unsigned int incoming, const gnutls_datum_t *msg) +{ + int ret; + unsigned pos; + gnutls_datum_t mmsg; + + if (!post) + return 0; + + switch (htype) { + case GNUTLS_HANDSHAKE_CLIENT_HELLO: + assert(msg->size >= HANDSHAKE_SESSION_ID_POS); + pos = HANDSHAKE_SESSION_ID_POS; + SKIP8(pos, msg->size); + SKIP16(pos, msg->size); + SKIP8(pos, msg->size); + + mmsg.data = &msg->data[pos]; + mmsg.size = msg->size - pos; + ret = gnutls_ext_raw_parse(&server_handshake_cb_data, ext_callback, &mmsg, 0); + assert(ret >= 0); + break; + case GNUTLS_HANDSHAKE_ENCRYPTED_EXTENSIONS: + ret = gnutls_ext_raw_parse(&client_handshake_cb_data, ext_callback, msg, 0); + assert(ret >= 0); + break; + default: + abort(); + } + return 0; +} + +#define MAX_BUF 16384 +static char buffer[MAX_BUF]; + +struct test_ext_st { + bool max_record_size; + bool record_size_limit; +}; + +struct test_st { + const char *prio; + size_t max_size; + + int expect_error; + size_t expect_size; + struct test_ext_st expect_server_ext; + struct test_ext_st expect_client_ext; +}; + +static void check_exts(const struct test_ext_st *exp, + struct handshake_cb_data_st *data) +{ + if (exp->max_record_size && !data->found_max_record_size) + fail("%s: didn't see max_record_size\n", side); + if (!exp->max_record_size && data->found_max_record_size) + fail("%s: did see max_record_size\n", side); + + if (exp->record_size_limit && !data->found_record_size_limit) + fail("%s: didn't see record_size_limit\n", side); + if (!exp->record_size_limit && data->found_record_size_limit) + fail("%s: did see record_size_limit\n", side); +} + +static void start(const struct test_st *test) +{ + int ret; + /* Server stuff. */ + gnutls_certificate_credentials_t serverx509cred; + gnutls_session_t server; + int sret = GNUTLS_E_AGAIN; + /* Client stuff. */ + gnutls_certificate_credentials_t clientx509cred; + gnutls_session_t client; + int cret = GNUTLS_E_AGAIN; + + memset(&server_handshake_cb_data, 0, sizeof(server_handshake_cb_data)); + memset(&client_handshake_cb_data, 0, sizeof(client_handshake_cb_data)); + + global_init(); + + /* General init. */ + gnutls_global_set_log_function(tls_log_func); + if (debug) + gnutls_global_set_log_level(6); + + /* Init server */ + gnutls_certificate_allocate_credentials(&serverx509cred); + gnutls_certificate_set_x509_key_mem(serverx509cred, + &server2_cert, &server2_key, + GNUTLS_X509_FMT_PEM); + + gnutls_init(&server, GNUTLS_SERVER); + gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, + serverx509cred); + + gnutls_priority_set_direct(server, test->prio, NULL); + gnutls_transport_set_push_function(server, server_push); + gnutls_transport_set_pull_function(server, server_pull); + gnutls_transport_set_pull_timeout_function(server, + server_pull_timeout_func); + gnutls_transport_set_ptr(server, server); + + server_handshake_cb_data.session = server; + gnutls_handshake_set_hook_function(server, + GNUTLS_HANDSHAKE_CLIENT_HELLO, + GNUTLS_HOOK_POST, + handshake_callback); + + + /* Init client */ + + ret = gnutls_certificate_allocate_credentials(&clientx509cred); + if (ret < 0) + exit(1); + + ret = gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca2_cert, GNUTLS_X509_FMT_PEM); + if (ret < 0) + exit(1); + + ret = gnutls_init(&client, GNUTLS_CLIENT); + if (ret < 0) + exit(1); + + ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE, + clientx509cred); + if (ret < 0) + exit(1); + + ret = gnutls_priority_set_direct(client, test->prio, NULL); + if (ret < 0) + exit(1); + + ret = gnutls_record_set_max_size(client, test->max_size); + if (ret != test->expect_error) + fail("unexpected error from gnutls_record_set_max_size()"); + if (ret == 0) + max_record_size = test->max_size; + else + max_record_size = MAX_BUF; + + gnutls_transport_set_push_function(client, client_push); + gnutls_transport_set_pull_function(client, client_pull); + gnutls_transport_set_pull_timeout_function(client, + client_pull_timeout_func); + gnutls_transport_set_ptr(client, client); + + client_handshake_cb_data.session = client; + gnutls_handshake_set_hook_function(client, + GNUTLS_HANDSHAKE_ENCRYPTED_EXTENSIONS, + GNUTLS_HOOK_POST, + handshake_callback); + + HANDSHAKE(client, server); + + memset(buffer, 1, sizeof(buffer)); + ret = gnutls_record_send(server, buffer, max_record_size + 1); + if (ret < 0) { + gnutls_perror(ret); + exit(1); + } + if (ret != (int)test->expect_size) + fail("unexpected record size sent: %d (%d)\n", + ret, (int)test->expect_size); + success("did not send a %d-byte packet\n", (int)max_record_size + 1); + + ret = gnutls_record_send(server, buffer, max_record_size); + if (ret < 0) { + gnutls_perror(ret); + exit(1); + } + success("did send a %d-byte packet\n", (int)max_record_size); + + gnutls_bye(client, GNUTLS_SHUT_RDWR); + gnutls_bye(server, GNUTLS_SHUT_RDWR); + + gnutls_deinit(client); + gnutls_deinit(server); + + gnutls_certificate_free_credentials(serverx509cred); + gnutls_certificate_free_credentials(clientx509cred); + + gnutls_global_deinit(); + + reset_buffers(); + + check_exts(&test->expect_server_ext, + &server_handshake_cb_data); + check_exts(&test->expect_client_ext, + &client_handshake_cb_data); +} + +static const struct test_st tests[] = { + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2", + .max_size = 511, + .expect_error = GNUTLS_E_INVALID_REQUEST, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 0 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2", + .max_size = 512, + .expect_error = 0, + .expect_size = 512, + .expect_server_ext = { + .max_record_size = 1, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 0 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2", + .max_size = 8192, + .expect_error = 0, + .expect_size = 8192, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 0 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2", + .max_size = 16384, + .expect_error = 0, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 0 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2", + .max_size = 16385, + .expect_error = GNUTLS_E_INVALID_REQUEST, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 0 + } + }, + + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.3", + .max_size = 511, + .expect_error = GNUTLS_E_INVALID_REQUEST, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 1 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.3", + .max_size = 512, + .expect_error = 0, + .expect_size = 512, + .expect_server_ext = { + .max_record_size = 1, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 1 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.3", + .max_size = 8192, + .expect_error = 0, + .expect_size = 8192, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 1 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.3", + .max_size = 16384, + .expect_error = 0, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 1 + } + }, + { + .prio = "NORMAL:-VERS-ALL:+VERS-TLS1.3", + .max_size = 16385, + .expect_error = GNUTLS_E_INVALID_REQUEST, + .expect_size = 16384, + .expect_server_ext = { + .max_record_size = 0, + .record_size_limit = 1 + }, + .expect_client_ext = { + .max_record_size = 0, + .record_size_limit = 1 + } + } +}; + +void doit(void) +{ + size_t i; + for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++) + start(&tests[i]); +} |