106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/* $NetBSD: cgdvar.h,v 1.18 2015/09/06 06:00:59 dholland Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Roland C. Dowdeswell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_CGDVAR_H_
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#define _DEV_CGDVAR_H_
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#include <sys/ioccom.h>
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/* ioctl(2) code: used by CGDIOCSET and CGDIOCCLR */
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struct cgd_ioctl {
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const char *ci_disk;
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int ci_flags;
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int ci_unit;
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size_t ci_size;
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const char *ci_alg;
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const char *ci_ivmethod;
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size_t ci_keylen;
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const char *ci_key;
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size_t ci_blocksize;
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};
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/* ioctl(2) code: used by CGDIOCGET */
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struct cgd_user {
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int cgu_unit; /* which cgd unit */
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dev_t cgu_dev; /* target device */
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char cgu_alg[32]; /* algorithm name */
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size_t cgu_blocksize; /* block size (in bytes) */
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int cgu_mode; /* Cipher Mode and IV Gen method */
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#define CGD_CIPHER_CBC_ENCBLKNO8 1 /* CBC Mode w/ Enc Block Number
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* 8 passes (compat only)
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*/
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#define CGD_CIPHER_CBC_ENCBLKNO1 2 /* CBC Mode w/ Enc Block Number
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* 1 pass (default)
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*/
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int cgu_keylen; /* keylength */
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};
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#ifdef _KERNEL
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#include <dev/cgd_crypto.h>
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/* This cryptdata structure is here rather than cgd_crypto.h, since
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* it stores local state which will not be generalised beyond the
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* cgd driver.
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*/
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struct cryptdata {
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size_t cf_blocksize; /* block size (in bytes) */
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int cf_keylen; /* key length */
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int cf_mode; /* Cipher Mode and IV Gen method
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* (see cgu_mode above for defines) */
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void *cf_priv; /* enc alg private data */
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};
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struct cgd_softc {
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struct dk_softc sc_dksc; /* generic disk interface */
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struct vnode *sc_tvn; /* target device's vnode */
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dev_t sc_tdev; /* target device */
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char *sc_tpath; /* target device's path */
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void * sc_data; /* emergency buffer */
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int sc_data_used; /* Really lame, we'll change */
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size_t sc_tpathlen; /* length of prior string */
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struct cryptdata sc_cdata; /* crypto data */
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const struct cryptfuncs *sc_cfuncs; /* encryption functions */
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kmutex_t sc_lock; /* our lock */
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};
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#endif
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/* XXX XAX XXX elric: check these out properly. */
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#define CGDIOCSET _IOWR('F', 18, struct cgd_ioctl)
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#define CGDIOCCLR _IOW('F', 19, struct cgd_ioctl)
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#define CGDIOCGET _IOWR('F', 20, struct cgd_user)
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/* Maximum block sized to be used by the ciphers */
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#define CGD_MAXBLOCKSIZE 128
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#endif /* _DEV_CGDVAR_H_ */
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