Retire the geom_aes class

It's had a good life, but it's not really configurable and not really used.

Obtained from:	opBSD (with some changes)
Differential Revision:	https://reviews.freebsd.org/D14991

1 files changed, 0 insertions, 375 deletions

diff --git a/sys/geom/geom_aes.c b/sys/geom/geom_aes.c
deleted file mode 100644
index 4436eb08fb6c..000000000000
--- a/sys/geom/geom_aes.c
+++ /dev/null
@@ -1,375 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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.
- * 3. The names of the authors may not be used to endorse or promote
- *    products derived from this software without specific prior written
- *    permission.
- *
- * 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.
- */
-
-/*
- * This method provides AES encryption with a compiled in key (default
- * all zeroes).
- *
- * XXX: This could probably save a lot of code by pretending to be a slicer.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/conf.h>
-#include <sys/bio.h>
-#include <sys/malloc.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/libkern.h>
-#include <sys/endian.h>
-#include <sys/md5.h>
-#include <sys/errno.h>
-#include <geom/geom.h>
-
-#include <crypto/rijndael/rijndael-api-fst.h>
-
-#define AES_CLASS_NAME "AES"
-
-#define MASTER_KEY_LENGTH	(1024/8)
-
-static const u_char *aes_magic = "<<FreeBSD-GEOM-AES>>";
-static const u_char *aes_magic_random = "<<FreeBSD-GEOM-AES-RANDOM>>";
-static const u_char *aes_magic_test = "<<FreeBSD-GEOM-AES-TEST>>";
-
-
-struct g_aes_softc {
-	enum {
-		KEY_ZERO,
-		KEY_RANDOM,
-		KEY_TEST
-	} keying;
-	u_int	sectorsize;
-	off_t	mediasize;
-	cipherInstance ci;
-	u_char master_key[MASTER_KEY_LENGTH];
-};
-
-/*
- * Generate a sectorkey from the masterkey and the offset position.
- *
- * For KEY_ZERO we just return a key of all zeros.
- *
- * We feed the sector byte offset, 16 bytes of the master-key and
- * the sector byte offset once more to MD5.
- * The sector byte offset is converted to little-endian format first
- * to support multi-architecture operation.
- * We use 16 bytes from the master-key starting at the logical sector
- * number modulus he length of the master-key.  If need be we wrap
- * around to the start of the master-key.
- */
-
-static void
-g_aes_makekey(struct g_aes_softc *sc, off_t off, keyInstance *ki, int dir)
-{
-	MD5_CTX cx;
-	u_int64_t u64;
-	u_int u, u1;
-	u_char *p, buf[16];
-
-	if (sc->keying == KEY_ZERO) {
-		rijndael_makeKey(ki, dir, 128, sc->master_key);
-		return;
-	}
-	MD5Init(&cx);
-	u64 = htole64(off);
-	MD5Update(&cx, (u_char *)&u64, sizeof(u64));
-	u = off / sc->sectorsize;
-	u %= sizeof sc->master_key;
-	p = sc->master_key + u;
-	if (u + 16 <= sizeof(sc->master_key)) {
-		MD5Update(&cx, p, 16);
-	} else {
-		u1 = sizeof sc->master_key - u;
-		MD5Update(&cx, p, u1);
-		MD5Update(&cx, sc->master_key, 16 - u1);
-		u1 = 0;				/* destroy evidence */
-	}
-	u = 0;					/* destroy evidence */
-	MD5Update(&cx, (u_char *)&u64, sizeof(u64));
-	u64 = 0;				/* destroy evidence */
-	MD5Final(buf, &cx);
-	bzero(&cx, sizeof cx);			/* destroy evidence */
-	rijndael_makeKey(ki, dir, 128, buf);
-	bzero(buf, sizeof buf);			/* destroy evidence */
-
-}
-
-static void
-g_aes_read_done(struct bio *bp)
-{
-	struct g_geom *gp;
-	struct g_aes_softc *sc;
-	u_char *p, *b, *e, *sb;
-	keyInstance dkey;
-	off_t o;
-
-	gp = bp->bio_from->geom;
-	sc = gp->softc;
-	sb = g_malloc(sc->sectorsize, M_WAITOK);
-	b = bp->bio_data;
-	e = bp->bio_data;
-	e += bp->bio_length;
-	o = bp->bio_offset - sc->sectorsize;
-	for (p = b; p < e; p += sc->sectorsize) {
-		g_aes_makekey(sc, o, &dkey, DIR_DECRYPT);
-		rijndael_blockDecrypt(&sc->ci, &dkey, p, sc->sectorsize * 8, sb);
-		bcopy(sb, p, sc->sectorsize);
-		o += sc->sectorsize;
-	}
-	bzero(&dkey, sizeof dkey);		/* destroy evidence */
-	bzero(sb, sc->sectorsize);		/* destroy evidence */
-	g_free(sb);
-	g_std_done(bp);
-}
-
-static void
-g_aes_write_done(struct bio *bp)
-{
-
-	bzero(bp->bio_data, bp->bio_length);	/* destroy evidence */
-	g_free(bp->bio_data);
-	g_std_done(bp);
-}
-
-static void
-g_aes_start(struct bio *bp)
-{
-	struct g_geom *gp;
-	struct g_consumer *cp;
-	struct g_aes_softc *sc;
-	struct bio *bp2;
-	u_char *p1, *p2, *b, *e;
-	keyInstance ekey;
-	off_t o;
-
-	gp = bp->bio_to->geom;
-	cp = LIST_FIRST(&gp->consumer);
-	sc = gp->softc;
-	switch (bp->bio_cmd) {
-	case BIO_READ:
-		bp2 = g_clone_bio(bp);
-		if (bp2 == NULL) {
-			g_io_deliver(bp, ENOMEM);
-			return;
-		}
-		bp2->bio_done = g_aes_read_done;
-		bp2->bio_offset += sc->sectorsize;
-		g_io_request(bp2, cp);
-		break;
-	case BIO_WRITE:
-		bp2 = g_clone_bio(bp);
-		if (bp2 == NULL) {
-			g_io_deliver(bp, ENOMEM);
-			return;
-		}
-		bp2->bio_done = g_aes_write_done;
-		bp2->bio_offset += sc->sectorsize;
-		bp2->bio_data = g_malloc(bp->bio_length, M_WAITOK);
-		b = bp->bio_data;
-		e = bp->bio_data;
-		e += bp->bio_length;
-		p2 = bp2->bio_data;
-		o = bp->bio_offset;
-		for (p1 = b; p1 < e; p1 += sc->sectorsize) {
-			g_aes_makekey(sc, o, &ekey, DIR_ENCRYPT);
-			rijndael_blockEncrypt(&sc->ci, &ekey,
-			    p1, sc->sectorsize * 8, p2);
-			p2 += sc->sectorsize;
-			o += sc->sectorsize;
-		}
-		bzero(&ekey, sizeof ekey);	/* destroy evidence */
-		g_io_request(bp2, cp);
-		break;
-	case BIO_GETATTR:
-		bp2 = g_clone_bio(bp);
-		if (bp2 == NULL) {
-			g_io_deliver(bp, ENOMEM);
-			return;
-		}
-		bp2->bio_done = g_std_done;
-		bp2->bio_offset += sc->sectorsize;
-		g_io_request(bp2, cp);
-		break;
-	default:
-		g_io_deliver(bp, EOPNOTSUPP);
-		return;
-	}
-	return;
-}
-
-static void
-g_aes_orphan(struct g_consumer *cp)
-{
-	struct g_geom *gp;
-	struct g_aes_softc *sc;
-
-	g_trace(G_T_TOPOLOGY, "g_aes_orphan(%p/%s)", cp, cp->provider->name);
-	g_topology_assert();
-
-	gp = cp->geom;
-	sc = gp->softc;
-	g_wither_geom(gp, ENXIO);
-	bzero(sc, sizeof(struct g_aes_softc));	/* destroy evidence */
-	g_free(sc);
-	return;
-}
-
-static int
-g_aes_access(struct g_provider *pp, int dr, int dw, int de)
-{
-	struct g_geom *gp;
-	struct g_consumer *cp;
-
-	gp = pp->geom;
-	cp = LIST_FIRST(&gp->consumer);
-	/* On first open, grab an extra "exclusive" bit */
-	if (cp->acr == 0 && cp->acw == 0 && cp->ace == 0)
-		de++;
-	/* ... and let go of it on last close */
-	if ((cp->acr + dr) == 0 && (cp->acw + dw) == 0 && (cp->ace + de) == 1)
-		de--;
-	return (g_access(cp, dr, dw, de));
-}
-
-static struct g_geom *
-g_aes_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
-{
-	struct g_geom *gp;
-	struct g_consumer *cp;
-	struct g_aes_softc *sc;
-	int error;
-	u_int sectorsize;
-	off_t mediasize;
-	u_char *buf;
-
-	g_trace(G_T_TOPOLOGY, "aes_taste(%s,%s)", mp->name, pp->name);
-	g_topology_assert();
-	gp = g_new_geomf(mp, "%s.aes", pp->name);
-	cp = g_new_consumer(gp);
-	g_attach(cp, pp);
-	error = g_access(cp, 1, 0, 0);
-	if (error) {
-		g_detach(cp);
-		g_destroy_consumer(cp);
-		g_destroy_geom(gp);
-		return (NULL);
-	}
-	buf = NULL;
-	g_topology_unlock();
-	do {
-		if (gp->rank != 2)
-			break;
-		sectorsize = cp->provider->sectorsize;
-		mediasize = cp->provider->mediasize;
-		buf = g_read_data(cp, 0, sectorsize, NULL);
-		if (buf == NULL) {
-			break;
-		}
-		sc = g_malloc(sizeof(struct g_aes_softc), M_WAITOK | M_ZERO);
-		if (!memcmp(buf, aes_magic, strlen(aes_magic))) {
-			sc->keying = KEY_ZERO;
-		} else if (!memcmp(buf, aes_magic_random, 
-		    strlen(aes_magic_random))) {
-			sc->keying = KEY_RANDOM;
-		} else if (!memcmp(buf, aes_magic_test, 
-		    strlen(aes_magic_test))) {
-			sc->keying = KEY_TEST;
-		} else {
-			g_free(sc);
-			break;
-		}
-		g_free(buf);
-		gp->softc = sc;
-		sc->sectorsize = sectorsize;
-		sc->mediasize = mediasize - sectorsize;
-		rijndael_cipherInit(&sc->ci, MODE_CBC, NULL);
-		if (sc->keying == KEY_TEST) {
-			int i;
-			u_char *p;
-
-			p = sc->master_key;
-			for (i = 0; i < (int)sizeof sc->master_key; i ++) 
-				*p++ = i;
-		}
-		if (sc->keying == KEY_RANDOM) {
-			int i;
-			u_int32_t u;
-			u_char *p;
-
-			p = sc->master_key;
-			for (i = 0; i < (int)sizeof sc->master_key; i += sizeof u) {
-				u = arc4random();
-				*p++ = u;
-				*p++ = u >> 8;
-				*p++ = u >> 16;
-				*p++ = u >> 24;
-			}
-		}
-		g_topology_lock();
-		pp = g_new_providerf(gp, "%s", gp->name);
-		pp->mediasize = mediasize - sectorsize;
-		pp->sectorsize = sectorsize;
-		g_error_provider(pp, 0);
-		g_topology_unlock();
-	} while(0);
-	g_topology_lock();
-	if (buf)
-		g_free(buf);
-	g_access(cp, -1, 0, 0);
-	if (gp->softc != NULL) 
-		return (gp);
-	g_detach(cp);
-	g_destroy_consumer(cp);
-	g_destroy_geom(gp);
-	return (NULL);
-}
-
-static struct g_class g_aes_class	= {
-	.name = AES_CLASS_NAME,
-	.version = G_VERSION,
-	.taste = g_aes_taste,
-	.start = g_aes_start,
-	.orphan = g_aes_orphan,
-	.spoiled = g_std_spoiled,
-	.access = g_aes_access,
-};
-
-DECLARE_GEOM_CLASS(g_aes_class, g_aes);