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Diffstat (limited to '')
| -rw-r--r-- | tests/tls13/rnd-rollback-detection.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/tests/tls13/rnd-rollback-detection.c b/tests/tls13/rnd-rollback-detection.c new file mode 100644 index 0000000..d64daa0 --- /dev/null +++ b/tests/tls13/rnd-rollback-detection.c @@ -0,0 +1,237 @@ +/* + * Copyright (C) 2017 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 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() +{ + 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" + +/* This program checks whether a TLS 1.3 client will detect + * a TLS 1.2 rollback attempt via the server random value. + */ + +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); +} + + + +static void client(int fd) +{ + int ret; + gnutls_certificate_credentials_t x509_cred; + gnutls_session_t session; + + global_init(); + + if (debug) { + gnutls_global_set_log_function(client_log_func); + gnutls_global_set_log_level(7); + } + + gnutls_certificate_allocate_credentials(&x509_cred); + gnutls_certificate_set_x509_key_mem(x509_cred, &cli_ca3_cert, + &cli_ca3_key, + GNUTLS_X509_FMT_PEM); + + /* Initialize TLS session + */ + gnutls_init(&session, GNUTLS_CLIENT); + + gnutls_handshake_set_timeout(session, get_timeout()); + + ret = gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.3:+VERS-TLS1.2:+VERS-TLS1.1:+VERS-TLS1.0", NULL); + if (ret < 0) + fail("cannot set TLS 1.2 priorities\n"); + + /* put the anonymous credentials to the current session + */ + 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 != GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER) { + fail("unexpected error during rollback: %s\n", gnutls_strerror(ret)); + } + + close(fd); + + gnutls_deinit(session); + + gnutls_certificate_free_credentials(x509_cred); + + gnutls_global_deinit(); +} + +#ifdef TLS12 +# define RND tls12_rnd +# define PRIO "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.2" +#elif TLS11 +# define RND tls11_rnd +# define PRIO "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.1:+VERS-TLS1.0" +#else +# error unknown version to test +#endif + +gnutls_datum_t tls12_rnd = {(void*)"\x00\x00\x00\x04\x00\x00\x00\x04" + "\x00\x00\x00\x04\x00\x00\x00\x04" + "\x00\x00\x00\x04\x00\x00\x00\x04" + "\x44\x4F\x57\x4E\x47\x52\x44\x01", + 32}; + +gnutls_datum_t tls11_rnd = {(void*)"\x00\x00\x00\x04\x00\x00\x00\x04" + "\x00\x00\x00\x04\x00\x00\x00\x04" + "\x00\x00\x00\x04\x00\x00\x00\x04" + "\x44\x4F\x57\x4E\x47\x52\x44\x00", + 32}; + +static void server(int fd) +{ + int ret; + gnutls_session_t session; + gnutls_certificate_credentials_t x509_cred; + + /* this must be called once in the program + */ + global_init(); + + 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_init(&session, GNUTLS_SERVER); + + gnutls_handshake_set_timeout(session, get_timeout()); + gnutls_handshake_set_random(session, &RND); + + assert(gnutls_priority_set_direct(session, PRIO, NULL)>=0); + + gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred); + + gnutls_transport_set_int(session, fd); + + do { + ret = gnutls_handshake(session); + if (ret == GNUTLS_E_INTERRUPTED) { /* expected */ + break; + } + } while (ret < 0 && gnutls_error_is_fatal(ret) == 0); + + + close(fd); + gnutls_deinit(session); + + gnutls_certificate_free_credentials(x509_cred); + + gnutls_global_deinit(); + + if (debug) + success("server: client/server hello were verified\n"); +} + +static void ch_handler(int sig) +{ + int status = 0; + wait(&status); + check_wait_status(status); + return; +} + +void doit(void) +{ + int fd[2]; + int ret; + pid_t child; + + signal(SIGCHLD, ch_handler); + signal(SIGPIPE, SIG_IGN); + + 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]); + client(fd[0]); + kill(child, SIGTERM); + } else { + close(fd[0]); + server(fd[1]); + exit(0); + } +} + +#endif /* _WIN32 */ |