1 /* $NetBSD: cgdvar.h,v 1.17 2014/03/18 15:44:37 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Roland C. Dowdeswell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _DEV_CGDVAR_H_ 33 #define _DEV_CGDVAR_H_ 34 35 /* ioctl(2) code: used by CGDIOCSET and CGDIOCCLR */ 36 struct cgd_ioctl { 37 const char *ci_disk; 38 int ci_flags; 39 int ci_unit; 40 size_t ci_size; 41 const char *ci_alg; 42 const char *ci_ivmethod; 43 size_t ci_keylen; 44 const char *ci_key; 45 size_t ci_blocksize; 46 }; 47 48 /* ioctl(2) code: used by CGDIOCGET */ 49 struct cgd_user { 50 int cgu_unit; /* which cgd unit */ 51 dev_t cgu_dev; /* target device */ 52 char cgu_alg[32]; /* algorithm name */ 53 size_t cgu_blocksize; /* block size (in bytes) */ 54 int cgu_mode; /* Cipher Mode and IV Gen method */ 55 #define CGD_CIPHER_CBC_ENCBLKNO8 1 /* CBC Mode w/ Enc Block Number 56 * 8 passes (compat only) 57 */ 58 #define CGD_CIPHER_CBC_ENCBLKNO1 2 /* CBC Mode w/ Enc Block Number 59 * 1 pass (default) 60 */ 61 int cgu_keylen; /* keylength */ 62 }; 63 64 #ifdef _KERNEL 65 66 #include <dev/cgd_crypto.h> 67 68 /* This cryptdata structure is here rather than cgd_crypto.h, since 69 * it stores local state which will not be generalised beyond the 70 * cgd driver. 71 */ 72 73 struct cryptdata { 74 size_t cf_blocksize; /* block size (in bytes) */ 75 int cf_keylen; /* key length */ 76 int cf_mode; /* Cipher Mode and IV Gen method 77 * (see cgu_mode above for defines) */ 78 void *cf_priv; /* enc alg private data */ 79 }; 80 81 struct cgd_softc { 82 struct dk_softc sc_dksc; /* generic disk interface */ 83 struct vnode *sc_tvn; /* target device's vnode */ 84 dev_t sc_tdev; /* target device */ 85 char *sc_tpath; /* target device's path */ 86 void * sc_data; /* emergency buffer */ 87 int sc_data_used; /* Really lame, we'll change */ 88 size_t sc_tpathlen; /* length of prior string */ 89 struct cryptdata sc_cdata; /* crypto data */ 90 const struct cryptfuncs *sc_cfuncs; /* encryption functions */ 91 kmutex_t sc_lock; /* our lock */ 92 }; 93 #endif 94 95 /* XXX XAX XXX elric: check these out properly. */ 96 #define CGDIOCSET _IOWR('F', 18, struct cgd_ioctl) 97 #define CGDIOCCLR _IOW('F', 19, struct cgd_ioctl) 98 #define CGDIOCGET _IOWR('F', 20, struct cgd_user) 99 100 /* Maximum block sized to be used by the ciphers */ 101 #define CGD_MAXBLOCKSIZE 128 102 103 #endif /* _DEV_CGDVAR_H_ */ 104