| 1 | /* $NetBSD: cgdvar.h,v 1.18 2015/09/06 06:00:59 dholland 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 | #include <sys/ioccom.h> |
| 36 | |
| 37 | /* ioctl(2) code: used by CGDIOCSET and CGDIOCCLR */ |
| 38 | struct cgd_ioctl { |
| 39 | const char *ci_disk; |
| 40 | int ci_flags; |
| 41 | int ci_unit; |
| 42 | size_t ci_size; |
| 43 | const char *ci_alg; |
| 44 | const char *ci_ivmethod; |
| 45 | size_t ci_keylen; |
| 46 | const char *ci_key; |
| 47 | size_t ci_blocksize; |
| 48 | }; |
| 49 | |
| 50 | /* ioctl(2) code: used by CGDIOCGET */ |
| 51 | struct cgd_user { |
| 52 | int cgu_unit; /* which cgd unit */ |
| 53 | dev_t cgu_dev; /* target device */ |
| 54 | char cgu_alg[32]; /* algorithm name */ |
| 55 | size_t cgu_blocksize; /* block size (in bytes) */ |
| 56 | int cgu_mode; /* Cipher Mode and IV Gen method */ |
| 57 | #define CGD_CIPHER_CBC_ENCBLKNO8 1 /* CBC Mode w/ Enc Block Number |
| 58 | * 8 passes (compat only) |
| 59 | */ |
| 60 | #define CGD_CIPHER_CBC_ENCBLKNO1 2 /* CBC Mode w/ Enc Block Number |
| 61 | * 1 pass (default) |
| 62 | */ |
| 63 | int cgu_keylen; /* keylength */ |
| 64 | }; |
| 65 | |
| 66 | #ifdef _KERNEL |
| 67 | |
| 68 | #include <dev/cgd_crypto.h> |
| 69 | |
| 70 | /* This cryptdata structure is here rather than cgd_crypto.h, since |
| 71 | * it stores local state which will not be generalised beyond the |
| 72 | * cgd driver. |
| 73 | */ |
| 74 | |
| 75 | struct cryptdata { |
| 76 | size_t cf_blocksize; /* block size (in bytes) */ |
| 77 | int cf_keylen; /* key length */ |
| 78 | int cf_mode; /* Cipher Mode and IV Gen method |
| 79 | * (see cgu_mode above for defines) */ |
| 80 | void *cf_priv; /* enc alg private data */ |
| 81 | }; |
| 82 | |
| 83 | struct cgd_softc { |
| 84 | struct dk_softc sc_dksc; /* generic disk interface */ |
| 85 | struct vnode *sc_tvn; /* target device's vnode */ |
| 86 | dev_t sc_tdev; /* target device */ |
| 87 | char *sc_tpath; /* target device's path */ |
| 88 | void * sc_data; /* emergency buffer */ |
| 89 | int sc_data_used; /* Really lame, we'll change */ |
| 90 | size_t sc_tpathlen; /* length of prior string */ |
| 91 | struct cryptdata sc_cdata; /* crypto data */ |
| 92 | const struct cryptfuncs *sc_cfuncs; /* encryption functions */ |
| 93 | kmutex_t sc_lock; /* our lock */ |
| 94 | }; |
| 95 | #endif |
| 96 | |
| 97 | /* XXX XAX XXX elric: check these out properly. */ |
| 98 | #define CGDIOCSET _IOWR('F', 18, struct cgd_ioctl) |
| 99 | #define CGDIOCCLR _IOW('F', 19, struct cgd_ioctl) |
| 100 | #define CGDIOCGET _IOWR('F', 20, struct cgd_user) |
| 101 | |
| 102 | /* Maximum block sized to be used by the ciphers */ |
| 103 | #define CGD_MAXBLOCKSIZE 128 |
| 104 | |
| 105 | #endif /* _DEV_CGDVAR_H_ */ |
| 106 | |