xform_deflate.c

/*	$OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $	*/
/*-
 * The authors of this code are John Ioannidis ([email protected]),
 * Angelos D. Keromytis ([email protected]),
 * Niels Provos ([email protected]) and
 * Damien Miller ([email protected]).
 *
 * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
 * in November 1995.
 *
 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
 * by Angelos D. Keromytis.
 *
 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
 * and Niels Provos.
 *
 * Additional features in 1999 by Angelos D. Keromytis.
 *
 * AES XTS implementation in 2008 by Damien Miller
 *
 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
 * Angelos D. Keromytis and Niels Provos.
 *
 * Copyright (C) 2001, Angelos D. Keromytis.
 *
 * Copyright (C) 2008, Damien Miller
 * Copyright (c) 2014 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by John-Mark Gurney
 * under sponsorship of the FreeBSD Foundation and
 * Rubicon Communications, LLC (Netgate).
 *
 * Permission to use, copy, and modify this software with or without fee
 * is hereby granted, provided that this entire notice is included in
 * all copies of any software which is or includes a copy or
 * modification of this software.
 * You may use this code under the GNU public license if you so wish. Please
 * contribute changes back to the authors under this freer than GPL license
 * so that we may further the use of strong encryption without limitations to
 * all.
 *
 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
 * PURPOSE.
 */

#include <sys/types.h>
#include <opencrypto/deflate.h>
#include <opencrypto/xform_comp.h>

static	uint32_t deflate_compress(uint8_t *, uint32_t, uint8_t **);
static	uint32_t deflate_decompress(uint8_t *, uint32_t, uint8_t **);

/* Compression instance */
const struct comp_algo comp_algo_deflate = {
	CRYPTO_DEFLATE_COMP, "Deflate",
	90, deflate_compress,
	deflate_decompress
};

/*
 * And compression
 */

static uint32_t
deflate_compress(uint8_t *data, uint32_t size, uint8_t **out)
{
	return deflate_global(data, size, 0, out);
}

static uint32_t
deflate_decompress(uint8_t *data, uint32_t size, uint8_t **out)
{
	return deflate_global(data, size, 1, out);
}