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/*
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* Copyright (C) 2004-2016 Free Software Foundation, Inc.
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* Copyright (C) 2013 Adam Sampson <ats@offog.org>
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* Copyright (C) 2016-2019 Red Hat, Inc.
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*
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* Author: Simon Josefsson, Nikos Mavrogiannopoulos, Daiki Ueno
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*
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* This file is part of GnuTLS.
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*
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* GnuTLS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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aea12f |
* (at your option) any later version.
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*
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* GnuTLS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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aea12f |
* General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>
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*/
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/* Parts copied from GnuTLS example programs. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_WIN32)
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/* socketpair isn't supported on Win32. */
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int main(int argc, char **argv)
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{
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exit(77);
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}
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#else
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#include <string.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#if !defined(_WIN32)
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#include <sys/wait.h>
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#endif
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#include <unistd.h>
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#include <gnutls/gnutls.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <assert.h>
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#include "utils.h"
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#include "cert-common.h"
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#include "virt-time.h"
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#define SKIP8(pos, total) { \
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uint8_t _s; \
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if (pos+1 > total) fail("error\n"); \
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_s = msg->data[pos]; \
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if ((size_t)(pos+1+_s) > total) fail("error\n"); \
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pos += 1+_s; \
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}
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pid_t child;
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/* A very basic TLS client, with anonymous authentication.
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*/
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#define SESSIONS 2
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#define MAX_BUF 5*1024
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#define MSG "Hello TLS"
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/* 2^13, which is not supported by max_fragment_length */
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#define MAX_DATA_SIZE 8192
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#define HANDSHAKE_SESSION_ID_POS (2+32)
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static void tls_log_func(int level, const char *str)
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{
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fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,
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str);
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}
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static int ext_callback(void *ctx, unsigned tls_id, const unsigned char *data, unsigned size)
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{
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if (tls_id == 28) { /* record size limit */
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uint16_t max_data_size;
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assert(size == 2);
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max_data_size = (data[0] << 8) | data[1];
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if (max_data_size == MAX_DATA_SIZE)
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fail("record_size_limit is not reset: %u == %u\n",
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max_data_size, MAX_DATA_SIZE);
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}
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return 0;
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}
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static int handshake_callback(gnutls_session_t session, unsigned int htype,
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unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
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{
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int ret;
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unsigned pos;
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gnutls_datum_t mmsg;
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if (!post)
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return 0;
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switch (htype) {
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case GNUTLS_HANDSHAKE_ENCRYPTED_EXTENSIONS:
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ret = gnutls_ext_raw_parse(NULL, ext_callback, msg, 0);
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assert(ret >= 0);
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break;
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case GNUTLS_HANDSHAKE_SERVER_HELLO:
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assert(msg->size >= HANDSHAKE_SESSION_ID_POS);
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pos = HANDSHAKE_SESSION_ID_POS;
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SKIP8(pos, msg->size);
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pos += 3;
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mmsg.data = &msg->data[pos];
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mmsg.size = msg->size - pos;
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ret = gnutls_ext_raw_parse(NULL, ext_callback, &mmsg, 0);
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assert(ret >= 0);
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break;
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default:
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break;
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}
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return 0;
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}
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static void client(int sds[], const char *prio)
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{
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int ret, ii;
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gnutls_session_t session;
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char buffer[MAX_BUF + 1];
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gnutls_certificate_credentials_t clientx509cred;
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/* variables used in session resuming
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*/
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int t;
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gnutls_datum_t session_data = {NULL, 0};
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if (debug) {
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gnutls_global_set_log_function(tls_log_func);
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gnutls_global_set_log_level(4);
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}
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gnutls_certificate_allocate_credentials(&clientx509cred);
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assert(gnutls_certificate_set_x509_key_mem(clientx509cred,
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&cli_cert, &cli_key,
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GNUTLS_X509_FMT_PEM) >= 0);
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for (t = 0; t < SESSIONS; t++) {
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int sd = sds[t];
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assert(gnutls_init(&session, GNUTLS_CLIENT)>=0);
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ret = gnutls_priority_set_direct(session, prio, NULL);
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if (ret < 0) {
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fail("prio: %s\n", gnutls_strerror(ret));
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}
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gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, clientx509cred);
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if (t == 0) {
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ret = gnutls_record_set_max_size(session, MAX_DATA_SIZE);
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if (ret < 0)
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fail("gnutls_set_max_size: %s\n", gnutls_strerror(ret));
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}
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if (t > 0) {
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/* if this is not the first time we connect */
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gnutls_session_set_data(session, session_data.data,
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session_data.size);
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gnutls_handshake_set_hook_function(session,
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GNUTLS_HANDSHAKE_ANY,
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GNUTLS_HOOK_POST,
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handshake_callback);
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}
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|
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gnutls_transport_set_int(session, sd);
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|
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/* Perform the TLS handshake
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*/
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gnutls_handshake_set_timeout(session, 20 * 1000);
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do {
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ret = gnutls_handshake(session);
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} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
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if (ret < 0) {
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fail("client: Handshake failed\n");
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gnutls_perror(ret);
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break;
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} else {
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if (debug)
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success
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("client: Handshake was completed\n");
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aea12f |
}
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if (t == 0) {
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/* get the session data size */
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ret =
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gnutls_session_get_data2(session,
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&session_data);
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if (ret < 0)
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aea12f |
fail("Getting resume data failed\n");
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aea12f |
|
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aea12f |
} else { /* the second time we connect */
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aea12f |
/* check if we actually resumed the previous session */
|
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aea12f |
if (gnutls_session_is_resumed(session) == 0) {
|
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aea12f |
fail("- Previous session was resumed but NOT expected\n");
|
|
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aea12f |
}
|
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aea12f |
}
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gnutls_record_send(session, MSG, strlen(MSG));
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|
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do {
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ret = gnutls_record_recv(session, buffer, MAX_BUF);
|
|
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aea12f |
} while (ret == GNUTLS_E_AGAIN);
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aea12f |
if (ret == 0) {
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if (debug)
|
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success
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("client: Peer has closed the TLS connection\n");
|
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aea12f |
break;
|
|
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aea12f |
} else if (ret < 0) {
|
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fail("client: Error: %s\n", gnutls_strerror(ret));
|
|
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aea12f |
}
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|
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aea12f |
if (debug) {
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aea12f |
printf("- Received %d bytes: ", ret);
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aea12f |
for (ii = 0; ii < ret; ii++) {
|
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aea12f |
fputc(buffer[ii], stdout);
|
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aea12f |
}
|
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aea12f |
fputs("\n", stdout);
|
|
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aea12f |
}
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|
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gnutls_bye(session, GNUTLS_SHUT_RDWR);
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|
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close(sd);
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|
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aea12f |
gnutls_deinit(session);
|
|
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}
|
|
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gnutls_free(session_data.data);
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|
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gnutls_certificate_free_credentials(clientx509cred);
|
|
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aea12f |
}
|
|
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|
|
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/* These are global */
|
|
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static gnutls_datum_t session_ticket_key = { NULL, 0 };
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|
|
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gnutls_certificate_credentials_t serverx509cred;
|
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|
|
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static void global_stop(void)
|
|
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{
|
|
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aea12f |
if (debug)
|
|
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aea12f |
success("global stop\n");
|
|
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aea12f |
|
|
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aea12f |
gnutls_certificate_free_credentials(serverx509cred);
|
|
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aea12f |
}
|
|
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aea12f |
|
|
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aea12f |
static void server(int sds[], const char *prio)
|
|
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{
|
|
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aea12f |
int t;
|
|
Packit |
aea12f |
int ret;
|
|
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aea12f |
gnutls_session_t session;
|
|
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aea12f |
char buffer[MAX_BUF + 1];
|
|
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aea12f |
unsigned iflags = GNUTLS_SERVER;
|
|
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aea12f |
|
|
Packit |
aea12f |
virt_time_init();
|
|
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aea12f |
|
|
Packit |
aea12f |
/* this must be called once in the program, it is mostly for the server.
|
|
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aea12f |
*/
|
|
Packit |
aea12f |
if (debug) {
|
|
Packit |
aea12f |
gnutls_global_set_log_function(tls_log_func);
|
|
Packit |
aea12f |
gnutls_global_set_log_level(4);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_certificate_allocate_credentials(&serverx509cred);
|
|
Packit |
aea12f |
assert(gnutls_certificate_set_x509_key_mem(serverx509cred,
|
|
Packit |
aea12f |
&server_cert, &server_key, GNUTLS_X509_FMT_PEM) >= 0);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_session_ticket_key_generate(&session_ticket_key);
|
|
Packit |
aea12f |
|
|
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aea12f |
for (t = 0; t < SESSIONS; t++) {
|
|
Packit |
aea12f |
int sd = sds[t];
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
assert(gnutls_init(&session, iflags) >= 0);
|
|
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aea12f |
|
|
Packit |
aea12f |
/* avoid calling all the priority functions, since the defaults
|
|
Packit |
aea12f |
* are adequate.
|
|
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aea12f |
*/
|
|
Packit |
aea12f |
assert(gnutls_priority_set_direct(session, prio, NULL) >= 0);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_session_ticket_enable_server(session,
|
|
Packit |
aea12f |
&session_ticket_key);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, serverx509cred);
|
|
Packit |
aea12f |
gnutls_transport_set_int(session, sd);
|
|
Packit |
aea12f |
gnutls_handshake_set_timeout(session, 20 * 1000);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
do {
|
|
Packit |
aea12f |
ret = gnutls_handshake(session);
|
|
Packit |
aea12f |
} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
|
|
Packit |
aea12f |
if (ret < 0) {
|
|
Packit |
aea12f |
close(sd);
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
kill(child, SIGTERM);
|
|
Packit |
aea12f |
fail("server: Handshake has failed (%s)\n\n",
|
|
Packit |
aea12f |
gnutls_strerror(ret));
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: Handshake was completed\n");
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (t > 0) {
|
|
Packit |
aea12f |
ret = gnutls_session_is_resumed(session);
|
|
Packit |
aea12f |
if (ret == 0) {
|
|
Packit |
aea12f |
fail("server: session_is_resumed error (%d)\n", t);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
/* see the Getting peer's information example */
|
|
Packit |
aea12f |
/* print_info(session); */
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
for (;;) {
|
|
Packit |
aea12f |
memset(buffer, 0, MAX_BUF + 1);
|
|
Packit |
aea12f |
ret = gnutls_record_recv(session, buffer, MAX_BUF);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (ret == 0) {
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success
|
|
Packit |
aea12f |
("server: Peer has closed the GnuTLS connection\n");
|
|
Packit |
aea12f |
break;
|
|
Packit |
aea12f |
} else if (ret < 0) {
|
|
Packit |
aea12f |
kill(child, SIGTERM);
|
|
Packit |
aea12f |
fail("server: Received corrupted data(%d). Closing...\n", ret);
|
|
Packit |
aea12f |
break;
|
|
Packit |
aea12f |
} else if (ret > 0) {
|
|
Packit |
aea12f |
/* echo data back to the client
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_record_send(session, buffer,
|
|
Packit |
aea12f |
strlen(buffer));
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
/* do not wait for the peer to close the connection.
|
|
Packit |
aea12f |
*/
|
|
Packit |
aea12f |
gnutls_bye(session, GNUTLS_SHUT_WR);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
close(sd);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_deinit(session);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
gnutls_free(session_ticket_key.data);
|
|
Packit |
aea12f |
session_ticket_key.data = NULL;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (debug)
|
|
Packit |
aea12f |
success("server: finished\n");
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
static void run(const char *prio)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
int client_sds[SESSIONS], server_sds[SESSIONS];
|
|
Packit |
aea12f |
int j;
|
|
Packit |
aea12f |
int err;
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
signal(SIGCHLD, SIG_IGN);
|
|
Packit |
aea12f |
signal(SIGPIPE, SIG_IGN);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
for (j = 0; j < SESSIONS; j++) {
|
|
Packit |
aea12f |
int sockets[2];
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
|
|
Packit |
aea12f |
if (err == -1) {
|
|
Packit |
aea12f |
perror("socketpair");
|
|
Packit |
aea12f |
fail("socketpair failed\n");
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
server_sds[j] = sockets[0];
|
|
Packit |
aea12f |
client_sds[j] = sockets[1];
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
child = fork();
|
|
Packit |
aea12f |
if (child < 0) {
|
|
Packit |
aea12f |
perror("fork");
|
|
Packit |
aea12f |
fail("fork\n");
|
|
Packit |
aea12f |
return;
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
if (child) {
|
|
Packit |
aea12f |
int status = 0;
|
|
Packit |
aea12f |
/* parent */
|
|
Packit |
aea12f |
for (j = 0; j < SESSIONS; j++)
|
|
Packit |
aea12f |
close(client_sds[j]);
|
|
Packit |
aea12f |
server(server_sds, prio);
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
waitpid(child, &status, 0);
|
|
Packit |
aea12f |
check_wait_status(status);
|
|
Packit |
aea12f |
global_stop();
|
|
Packit |
aea12f |
} else {
|
|
Packit |
aea12f |
for (j = 0; j < SESSIONS; j++)
|
|
Packit |
aea12f |
close(server_sds[j]);
|
|
Packit |
aea12f |
client(client_sds, prio);
|
|
Packit |
aea12f |
exit(0);
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
void doit(void)
|
|
Packit |
aea12f |
{
|
|
Packit |
aea12f |
run("NORMAL:-VERS-ALL:+VERS-TLS1.2");
|
|
Packit |
aea12f |
run("NORMAL:-VERS-ALL:+VERS-TLS1.3");
|
|
Packit |
aea12f |
}
|
|
Packit |
aea12f |
|
|
Packit |
aea12f |
#endif /* _WIN32 */
|