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Diffstat (limited to '')
| -rw-r--r-- | tests/record-pad.c | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/tests/record-pad.c b/tests/record-pad.c new file mode 100644 index 0000000..f625163 --- /dev/null +++ b/tests/record-pad.c @@ -0,0 +1,415 @@ +/* + * Copyright (C) 2012-2018 Free Software Foundation, Inc. + * + * Author: Nikos Mavrogiannopoulos, 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 <stdio.h> +#include <stdlib.h> + +#if defined(_WIN32) + +int main(void) +{ + exit(77); +} + +#else + +#include <string.h> +#include <sys/types.h> +#include <netinet/in.h> +#include <sys/socket.h> +#include <sys/wait.h> +#include <arpa/inet.h> +#include <unistd.h> +#include <gnutls/gnutls.h> +#include <gnutls/dtls.h> +#include <signal.h> +#include <assert.h> + +#include "cert-common.h" +#include "utils.h" + +#define MAX_BUF 1024 +#define HIGH(x) (3*x) +static void terminate(void); +static size_t total; + +/* This program tests the robustness of record sending with padding. + */ + +static void server_log_func(int level, const char *str) +{ + fprintf(stderr, "server|<%d>| %s", level, str); +} + +static void client_log_func(int level, const char *str) +{ + fprintf(stderr, "client|<%d>| %s", level, str); +} + + +/* A very basic TLS client, with anonymous authentication. + */ + + + +static ssize_t +push(gnutls_transport_ptr_t tr, const void *data, size_t len) +{ + int fd = (long int) tr; + + total += len; + return send(fd, data, len, 0); +} + +struct test_st { + const char *name; + size_t pad; + size_t data; + const char *prio; + unsigned flags; + int sret; +}; + +static void client(int fd, struct test_st *test) +{ + int ret; + char buffer[MAX_BUF + 1]; + gnutls_anon_client_credentials_t anoncred; + gnutls_certificate_credentials_t x509_cred; + gnutls_session_t session; + /* Need to enable anonymous KX specifically. */ + + global_init(); + + if (debug) { + gnutls_global_set_log_function(client_log_func); + gnutls_global_set_log_level(7); + } + + gnutls_anon_allocate_client_credentials(&anoncred); + gnutls_certificate_allocate_credentials(&x509_cred); + + assert(gnutls_init(&session, GNUTLS_CLIENT|test->flags)>=0); + assert(gnutls_priority_set_direct(session, test->prio, NULL)>=0); + + /* put the anonymous credentials to the current session + */ + gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred); + gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); + + gnutls_transport_set_int(session, fd); + + /* Perform the TLS handshake + */ + do { + ret = gnutls_handshake(session); + } + while (ret < 0 && gnutls_error_is_fatal(ret) == 0); + + if (ret < 0) { + fail("client: Handshake failed\n"); + gnutls_perror(ret); + exit(1); + } else { + if (debug) + success("client: Handshake was completed\n"); + } + + if (debug) + success("client: TLS version is: %s\n", + gnutls_protocol_get_name + (gnutls_protocol_get_version(session))); + + do { + do { + ret = gnutls_record_recv(session, buffer, sizeof(buffer)); + } while (ret == GNUTLS_E_AGAIN + || ret == GNUTLS_E_INTERRUPTED); + } while (ret > 0); + + if (ret == 0) { + if (debug) + success + ("client: Peer has closed the TLS connection\n"); + goto end; + } else if (ret < 0) { + if (ret != 0) { + fail("client: Error: %s\n", gnutls_strerror(ret)); + exit(1); + } + } + + gnutls_bye(session, GNUTLS_SHUT_WR); + + end: + + close(fd); + + gnutls_deinit(session); + + gnutls_anon_free_client_credentials(anoncred); + gnutls_certificate_free_credentials(x509_cred); + + gnutls_global_deinit(); +} + + +/* These are global */ +pid_t child; + +static void terminate(void) +{ + assert(child); + kill(child, SIGTERM); + exit(1); +} + +static void server(int fd, struct test_st *test) +{ + int ret; + char buffer[MAX_BUF + 1]; + gnutls_session_t session; + gnutls_anon_server_credentials_t anoncred; + gnutls_certificate_credentials_t x509_cred; + size_t expected; + + /* this must be called once in the program + */ + global_init(); + memset(buffer, 0, sizeof(buffer)); + + if (debug) { + gnutls_global_set_log_function(server_log_func); + gnutls_global_set_log_level(4711); + } + + gnutls_certificate_allocate_credentials(&x509_cred); + gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert, + &server_key, + GNUTLS_X509_FMT_PEM); + + gnutls_anon_allocate_server_credentials(&anoncred); + + assert(gnutls_init(&session, GNUTLS_SERVER|test->flags)>=0); + + assert(gnutls_priority_set_direct(session, test->prio, NULL)>=0); + + gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred); + gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); + + gnutls_transport_set_int(session, fd); + + do { + ret = gnutls_handshake(session); + } + while (ret < 0 && gnutls_error_is_fatal(ret) == 0); + if (ret < 0) { + close(fd); + gnutls_deinit(session); + fail("server: Handshake has failed (%s)\n\n", + gnutls_strerror(ret)); + terminate(); + } + if (debug) + success("server: Handshake was completed\n"); + + if (debug) + success("server: TLS version is: %s\n", + gnutls_protocol_get_name + (gnutls_protocol_get_version(session))); + + gnutls_transport_set_push_function(session, push); + + assert(test->data <= sizeof(buffer)); + + total = 0; + do { + ret = + gnutls_record_send2(session, buffer, + test->data, + test->pad, 0); + } while (ret == GNUTLS_E_AGAIN + || ret == GNUTLS_E_INTERRUPTED); + + if (test->sret < 0) { + if (ret >= 0) + fail("server: expected failure got success!\n"); + if (ret != test->sret) + fail("server: expected different failure: '%s', got: '%s'\n", + gnutls_strerror(test->sret), gnutls_strerror(ret)); + goto finish; + } + + if (ret < 0) { + fail("Error sending packet: %s\n", + gnutls_strerror(ret)); + terminate(); + } + + expected = test->data + test->pad + gnutls_record_overhead_size(session); + if (total != expected) { + fail("Sent data (%u) are lower than expected (%u)\n", + (unsigned) total, (unsigned) expected); + terminate(); + } + + finish: + /* do not wait for the peer to close the connection. + */ + gnutls_bye(session, GNUTLS_SHUT_WR); + + close(fd); + gnutls_deinit(session); + + gnutls_anon_free_server_credentials(anoncred); + gnutls_certificate_free_credentials(x509_cred); + + gnutls_global_deinit(); + + if (debug) + success("server: finished\n"); +} + +static void start(struct test_st *test) +{ + int fd[2]; + int ret; + + success("running %s\n", test->name); + + ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); + if (ret < 0) { + perror("socketpair"); + exit(1); + } + + child = fork(); + if (child < 0) { + perror("fork"); + fail("fork"); + exit(1); + } + + if (child) { + /* parent */ + close(fd[1]); + server(fd[0], test); + kill(child, SIGTERM); + } else { + close(fd[0]); + client(fd[1], test); + exit(0); + } +} + +#define AES_GCM "NONE:+VERS-TLS1.3:+AES-256-GCM:+AEAD:+SIGN-ALL:+GROUP-ALL" + +static void ch_handler(int sig) +{ + int status; + wait(&status); + check_wait_status(status); + return; +} + +struct test_st tests[] = +{ + { + .name = "AES-GCM with max pad", + .pad = HIGH(MAX_BUF+1)-(MAX_BUF+1), + .data = MAX_BUF, + .prio = AES_GCM, + .flags = 0 + }, + { + .name = "AES-GCM with zero pad", + .pad = 0, + .data = MAX_BUF, + .prio = AES_GCM, + .flags = 0 + }, + { + .name = "AES-GCM with 1-byte pad", + .pad = 1, + .data = MAX_BUF, + .prio = AES_GCM, + .flags = 0 + }, + { + .name = "AES-GCM with pad, but no data", + .pad = 16, + .data = 0, + .prio = AES_GCM, + .flags = 0 + }, + { + .name = "AES-GCM with max pad and safe padding check", + .pad = HIGH(MAX_BUF+1)-(MAX_BUF+1), + .data = MAX_BUF, + .prio = AES_GCM, + .flags = GNUTLS_SAFE_PADDING_CHECK + }, + { + .name = "AES-GCM with zero pad and safe padding check", + .pad = 0, + .data = MAX_BUF, + .prio = AES_GCM, + .flags = GNUTLS_SAFE_PADDING_CHECK + }, + { + .name = "AES-GCM with 1-byte pad and safe padding check", + .pad = 1, + .data = MAX_BUF, + .prio = AES_GCM, + .flags = GNUTLS_SAFE_PADDING_CHECK + }, + { + .name = "AES-GCM with pad, but no data and safe padding check", + .pad = 16, + .data = 0, + .prio = AES_GCM, + .flags = GNUTLS_SAFE_PADDING_CHECK + }, + { + .name = "AES-GCM with pad, but no data and no pad", + .pad = 0, + .data = 0, + .prio = AES_GCM, + .flags = GNUTLS_SAFE_PADDING_CHECK, + .sret = GNUTLS_E_INVALID_REQUEST + }, +}; + +void doit(void) +{ + unsigned i; + signal(SIGCHLD, ch_handler); + + for (i=0;i<sizeof(tests)/sizeof(tests[0]);i++) { + start(&tests[i]); + } +} + +#endif /* _WIN32 */ |