/*-

 * Copyright (c) 2003-2007,2016 Tim Kientzle

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "test.h"

__FBSDID("$FreeBSD$");

#define UMASK 022

/*

 * Github Issue #744 describes a bug in the sandboxing code that

 * causes very long pathnames to not get checked for symlinks.

 */

DEFINE_TEST(test_write_disk_secure744)

{

#if defined(_WIN32) && !defined(__CYGWIN__)

	skipping("archive_write_disk security checks not supported on Windows");

#else

	struct archive *a;

	struct archive_entry *ae;

	size_t buff_size = 8192;

	char *buff = malloc(buff_size);

	char *p = buff;

	int n = 0;

	int t;

	assert(buff != NULL);

	/* Start with a known umask. */

	assertUmask(UMASK);

	/* Create an archive_write_disk object. */

	assert((a = archive_write_disk_new()) != NULL);

	archive_write_disk_set_options(a, ARCHIVE_EXTRACT_SECURE_SYMLINKS);

	while (p + 500 < buff + buff_size) {

		memset(p, 'x', 100);

		p += 100;

		p[0] = '\0';

		buff[0] = ((n / 1000) % 10) + '0';

		buff[1] = ((n / 100) % 10)+ '0';

		buff[2] = ((n / 10) % 10)+ '0';

		buff[3] = ((n / 1) % 10)+ '0';

		buff[4] = '_';

		++n;

		/* Create a symlink pointing to the testworkdir */

		assert((ae = archive_entry_new()) != NULL);

		archive_entry_copy_pathname(ae, buff);

		archive_entry_set_mode(ae, S_IFREG | 0777);

		archive_entry_copy_symlink(ae, testworkdir);

		assertEqualIntA(a, ARCHIVE_OK, archive_write_header(a, ae));

		archive_entry_free(ae);

		*p++ = '/';

		sprintf(p, "target%d", n);

		/* Try to create a file through the symlink, should fail. */

		assert((ae = archive_entry_new()) != NULL);

		archive_entry_copy_pathname(ae, buff);

		archive_entry_set_mode(ae, S_IFDIR | 0777);

		t = archive_write_header(a, ae);

		archive_entry_free(ae);

		failure("Attempt to create target%d via %d-character symlink should have failed", n, (int)strlen(buff));

		if(!assertEqualInt(ARCHIVE_FAILED, t)) {

			break;

		}

	}

	archive_free(a);

	free(buff);

#endif

}