/*- * Copyright (c) 2002 Poul-Henning Kamp * Copyright (c) 2002 Networks Associates Technology, Inc. * All rights reserved. * * This software was developed for the FreeBSD Project by Poul-Henning Kamp * and NAI Labs, the Security Research Division of Network Associates, Inc. * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the * DARPA CHATS research program. * * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * $FreeBSD$ */ #ifndef _SYS_GEOM_BDE_G_BDE_H_ #define _SYS_GEOM_BDE_G_BDE_H_ 1 /* * These are quite, but not entirely unlike constants. * * They are not commented in details here, to prevent unadvisable * experimentation. Please consult the code where they are used before you * even think about modifying these. */ #define G_BDE_MKEYLEN (2048/8) #define G_BDE_SKEYBITS 128 #define G_BDE_SKEYLEN (G_BDE_SKEYBITS/8) #define G_BDE_KKEYBITS 128 #define G_BDE_KKEYLEN (G_BDE_KKEYBITS/8) #define G_BDE_MAXKEYS 4 #define G_BDE_LOCKSIZE 384 #define NLOCK_FIELDS 13 /* This just needs to be "large enough" */ #define G_BDE_KEYBYTES 304 struct g_bde_work; struct g_bde_softc; struct g_bde_sector { struct g_bde_work *owner; struct g_bde_softc *softc; off_t offset; u_int size; u_int ref; void *data; TAILQ_ENTRY(g_bde_sector) list; u_char valid; u_char malloc; enum {JUNK, IO, VALID} state; int error; time_t used; }; struct g_bde_work { struct mtx mutex; off_t offset; off_t length; void *data; struct bio *bp; struct g_bde_softc *softc; off_t so; off_t kso; u_int ko; struct g_bde_sector *sp; struct g_bde_sector *ksp; TAILQ_ENTRY(g_bde_work) list; enum {SETUP, WAIT, FINISH} state; int error; }; /* * The decrypted contents of the lock sectors. Notice that this is not * the same as the on-disk layout. The on-disk layout is dynamic and * dependent on the pass-phrase. */ struct g_bde_key { uint64_t sector0; /* Physical byte offset of 1st byte used */ uint64_t sectorN; /* Physical byte offset of 1st byte not used */ uint64_t keyoffset; /* Number of bytes the disk image is skewed. */ uint64_t lsector[G_BDE_MAXKEYS]; /* Physical byte offsets of lock sectors */ uint32_t sectorsize; /* Our "logical" sector size */ uint32_t flags; #define GBDE_F_SECT0 1 uint8_t salt[16]; /* Used to frustate the kkey generation */ uint8_t spare[32]; /* For future use, random contents */ uint8_t mkey[G_BDE_MKEYLEN]; /* Our masterkey. */ /* Non-stored help-fields */ uint64_t zone_width; /* On-disk width of zone */ uint64_t zone_cont; /* Payload width of zone */ uint64_t media_width; /* Non-magic width of zone */ u_int keys_per_sector; }; struct g_bde_softc { off_t mediasize; u_int sectorsize; uint64_t zone_cont; struct g_geom *geom; struct g_consumer *consumer; TAILQ_HEAD(, g_bde_sector) freelist; TAILQ_HEAD(, g_bde_work) worklist; struct mtx worklist_mutex; struct proc *thread; struct g_bde_key key; int dead; u_int nwork; u_int nsect; u_int ncache; u_char sha2[SHA512_DIGEST_LENGTH]; }; /* g_bde_crypt.c */ void g_bde_crypt_delete(struct g_bde_work *wp); void g_bde_crypt_read(struct g_bde_work *wp); void g_bde_crypt_write(struct g_bde_work *wp); /* g_bde_key.c */ void g_bde_zap_key(struct g_bde_softc *sc); int g_bde_get_key(struct g_bde_softc *sc, void *ptr, int len); int g_bde_init_keybytes(struct g_bde_softc *sc, char *passp, int len); /* g_bde_lock .c */ int g_bde_encode_lock(u_char *sha2, struct g_bde_key *gl, u_char *ptr); int g_bde_decode_lock(struct g_bde_softc *sc, struct g_bde_key *gl, u_char *ptr); int g_bde_keyloc_encrypt(u_char *sha2, uint64_t v0, uint64_t v1, void *output); int g_bde_keyloc_decrypt(u_char *sha2, void *input, uint64_t *output); int g_bde_decrypt_lock(struct g_bde_softc *sc, u_char *keymat, u_char *meta, off_t mediasize, u_int sectorsize, u_int *nkey); void g_bde_hash_pass(struct g_bde_softc *sc, const void *input, u_int len); /* g_bde_math .c */ uint64_t g_bde_max_sector(struct g_bde_key *lp); void g_bde_map_sector(struct g_bde_work *wp); /* g_bde_work.c */ void g_bde_start1(struct bio *bp); void g_bde_worker(void *arg); /* * These four functions wrap the raw Rijndael functions and make sure we * explode if something fails which shouldn't. */ static __inline void AES_init(cipherInstance *ci) { int error; error = rijndael_cipherInit(ci, MODE_CBC, NULL); KASSERT(error > 0, ("rijndael_cipherInit %d", error)); } static __inline void AES_makekey(keyInstance *ki, int dir, u_int len, void *key) { int error; error = rijndael_makeKey(ki, dir, len, key); KASSERT(error > 0, ("rijndael_makeKey %d", error)); } static __inline void AES_encrypt(cipherInstance *ci, keyInstance *ki, void *in, void *out, u_int len) { int error; error = rijndael_blockEncrypt(ci, ki, in, len * 8, out); KASSERT(error > 0, ("rijndael_blockEncrypt %d", error)); } static __inline void AES_decrypt(cipherInstance *ci, keyInstance *ki, void *in, void *out, u_int len) { int error; error = rijndael_blockDecrypt(ci, ki, in, len * 8, out); KASSERT(error > 0, ("rijndael_blockDecrypt %d", error)); } #endif /* _SYS_GEOM_BDE_G_BDE_H_ */