/*-

 * Copyright (c) 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");

#include <locale.h>

/*

 * Github Issue 748 reported problems with end-of-entry handling

 * with highly-compressible data.  This resulted in the end of the

 * data being truncated (extracted as zero bytes).

 */

/*

 * Extract the specific test archive that was used to diagnose

 * Issue 748:

 */

DEFINE_TEST(test_read_format_zip_high_compression)

{

	const char *refname = "test_read_format_zip_high_compression.zip";

	char *p;

	size_t archive_size;

	struct archive *a;

	struct archive_entry *entry;

	const void *pv;

	size_t s;

	int64_t o;

	if (archive_zlib_version() == NULL) {

		skipping("Zip compression test requires zlib");

		return;

	}

	extract_reference_file(refname);

	p = slurpfile(&archive_size, refname);

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

        assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_zip(a));

        assertEqualIntA(a, ARCHIVE_OK, read_open_memory_seek(a, p, archive_size, 16 * 1024));

	assertEqualInt(ARCHIVE_OK, archive_read_next_header(a, &entry));

	assertEqualInt(ARCHIVE_OK, archive_read_data_block(a, &pv, &s, &o);;

	assertEqualInt(262144, s);

	assertEqualInt(0, o);

	assertEqualInt(ARCHIVE_OK, archive_read_data_block(a, &pv, &s, &o);;

	assertEqualInt(160, s);

	assertEqualInt(262144, o);

	assertEqualInt(ARCHIVE_EOF, archive_read_data_block(a, &pv, &s, &o);;

	assertEqualInt(ARCHIVE_OK, archive_free(a));

	free(p);

}

/*

 * Synthesize a lot of varying inputs that are highly compressible.

 */

DEFINE_TEST(test_read_format_zip_high_compression2)

{

	const size_t body_size = 1024 * 1024;

	const size_t buff_size = 2 * 1024 * 1024;

	char *body, *body_read, *buff;

	int n;

	if (archive_zlib_version() == NULL) {

		skipping("Zip compression test requires zlib");

		return;

	}

	assert((body = malloc(body_size)) != NULL);

	assert((body_read = malloc(body_size)) != NULL);

	assert((buff = malloc(buff_size)) != NULL);

	/* Highly-compressible data: all bytes 255, except for a

	 * single 1 byte.

	 * The body is always 256k + 6 bytes long (the internal deflation

	 * buffer is exactly 256k).

	 */

	for(n = 1024; n < (int)body_size; n += 1024) {

		struct archive *a;

		struct archive_entry *entry;

		size_t used = 0;

		const void *pv;

		size_t s;

		int64_t o;

		memset(body, 255, body_size);

		body[n] = 1;

		/* Write an archive with a single entry of n bytes. */

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

		assertEqualInt(ARCHIVE_OK, archive_write_set_format_zip(a));

		assertEqualInt(ARCHIVE_OK, archive_write_open_memory(a, buff, buff_size, &used));

		entry = archive_entry_new2(a);

		archive_entry_set_pathname(entry, "test");

		archive_entry_set_filetype(entry, AE_IFREG);

		archive_entry_set_size(entry, 262150);

		assertEqualInt(ARCHIVE_OK, archive_write_header(a, entry));

		archive_entry_free(entry);

		assertEqualInt(262150, archive_write_data(a, body, 262150));

		assertEqualInt(ARCHIVE_OK, archive_write_free(a));

		/* Read back the entry and verify the contents. */

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

		assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_all(a));

		assertEqualIntA(a, ARCHIVE_OK, archive_read_support_filter_all(a));

		assertEqualIntA(a, ARCHIVE_OK, read_open_memory(a, buff, used, 17));

		assertEqualInt(ARCHIVE_OK, archive_read_next_header(a, &entry));

		assertEqualInt(ARCHIVE_OK, archive_read_data_block(a, &pv, &s, &o);;

		assertEqualInt(262144, s);

		assertEqualInt(0, o);

		assertEqualInt(ARCHIVE_OK, archive_read_data_block(a, &pv, &s, &o);;

		assertEqualInt(6, s);

		assertEqualInt(262144, o);

		assertEqualInt(ARCHIVE_EOF, archive_read_data_block(a, &pv, &s, &o);;

		assertEqualInt(ARCHIVE_OK, archive_free(a));

	}

	free(body);

	free(body_read);

	free(buff);

}