/*

 * Copyright (C) 2016 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

 */

/* Parts copied from GnuTLS example programs. */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdbool.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#if !defined(_WIN32)

#include <netinet/in.h>

#include <sys/socket.h>

#include <sys/wait.h>

#include <arpa/inet.h>

#endif

#include <fcntl.h>

#include <unistd.h>

#include <assert.h>

#include <gnutls/gnutls.h>

#include <gnutls/x509.h>

#include "utils.h"

#include "cert-common.h"

/* Test for SSLKEYLOGFILE being functional.

 *

 */

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "<%d>| %s", level, str);

}

/* In TLS 1.2, we only expect CLIENT_RANDOM.  */

static const char *tls12_included_labels[] = { "CLIENT_RANDOM", NULL };

static const char *tls12_excluded_labels[] = { NULL };

/* In TLS 1.3, we expect secrets derived in handshake phases, but not

 * CLIENT_RANDOM.  */

static const char *tls13_included_labels[] = {

	"CLIENT_HANDSHAKE_TRAFFIC_SECRET",

	"SERVER_HANDSHAKE_TRAFFIC_SECRET",

	"CLIENT_TRAFFIC_SECRET_0",

	"SERVER_TRAFFIC_SECRET_0",

	"EXPORTER_SECRET",

	NULL

};

static const char *tls13_excluded_labels[] = { "CLIENT_RANDOM", NULL };

static void search_for_str(const char *filename, const char *label, bool excluded)

{

	char line[512];

	FILE *fp = fopen(filename, "r");

	char *p;

	while( (p = fgets(line, sizeof(line), fp)) != NULL) {

		success("%s", line);

		if (strncmp(line, label, strlen(label)) == 0 &&

		    line[strlen(label)] == ' ') {

			fclose(fp);

			if (excluded)

				fail("file should not contain %s\n", label);

			return;

		}

	}

	fclose(fp);

	if (!excluded)

		fail("file should contain %s\n", label);

}

static void run(const char *filename, const char *prio,

		const char **included, const char **excluded)

{

	gnutls_certificate_credentials_t x509_cred;

	gnutls_certificate_credentials_t clicred;

	const char **p;

	int ret;

#ifdef _WIN32

	{

		char buf[512];

		snprintf(buf, sizeof(buf), "SSLKEYLOGFILE=%s", filename);

		_putenv(buf);

	}

#else

	setenv("SSLKEYLOGFILE", filename, 1);

#endif

	if (debug) {

		gnutls_global_set_log_level(6);

		gnutls_global_set_log_function(tls_log_func);

	}

	/* test gnutls_certificate_flags() */

	assert(gnutls_certificate_allocate_credentials(&x509_cred)>=0);

	assert(gnutls_certificate_allocate_credentials(&clicred) >= 0);

	ret = gnutls_certificate_set_x509_key_mem(x509_cred, &server_ca3_localhost_cert_chain,

					    &server_ca3_key,

					    GNUTLS_X509_FMT_PEM);

	if (ret < 0) {

		fail("error in error code\n");

		exit(1);

	}

	ret = gnutls_certificate_set_x509_trust_mem(clicred, &ca3_cert, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		fail("set_x509_trust_file failed: %s\n", gnutls_strerror(ret));

	test_cli_serv(x509_cred, clicred, prio, "localhost", NULL, NULL, NULL);

	if (access(filename, R_OK) != 0) {

		fail("keylog file was not created\n");

		exit(1);

	}

	for (p = included; *p; p++)

		search_for_str(filename, *p, false);

	for (p = excluded; *p; p++)

		search_for_str(filename, *p, true);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_certificate_free_credentials(clicred);

	if (debug)

		success("success");

}

void doit(void)

{

	char filename[TMPNAME_SIZE];

	assert(get_tmpname(filename)!=NULL);

	remove(filename);

	global_init();

	run(filename,

	    "NONE:+VERS-TLS1.2:+AES-128-CBC:+SHA1:+SIGN-ALL:+COMP-NULL:+RSA",

	    tls12_included_labels, tls12_excluded_labels);

	/* This is needed because the SSLKEYLOGFILE envvar is checked

	 * only once and the file is never closed until the library is

	 * unloaded.  Truncate the file to zero length, so we can

	 * reuse the same file for multiple tests.  */

	truncate(filename, 0);

	run(filename,

	    "NONE:+VERS-TLS1.3:+AES-256-GCM:+AEAD:+SIGN-ALL:+GROUP-ALL",

	    tls13_included_labels, tls13_excluded_labels);

	gnutls_global_deinit();

	remove(filename);

}