2005-07-27 21:43:37 +00:00
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/*-
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* Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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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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2006-02-01 12:06:01 +00:00
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*
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2005-07-27 21:43:37 +00:00
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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2006-02-11 13:08:24 +00:00
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#include <sys/linker.h>
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2005-07-27 21:43:37 +00:00
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/bio.h>
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#include <sys/sysctl.h>
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#include <sys/malloc.h>
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#include <sys/kthread.h>
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#include <sys/proc.h>
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#include <sys/sched.h>
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2005-08-21 18:12:51 +00:00
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#include <sys/smp.h>
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2005-07-27 21:43:37 +00:00
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#include <sys/uio.h>
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2006-02-11 12:45:01 +00:00
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#include <sys/vnode.h>
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2005-07-27 21:43:37 +00:00
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#include <vm/uma.h>
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#include <geom/geom.h>
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#include <geom/eli/g_eli.h>
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#include <geom/eli/pkcs5v2.h>
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MALLOC_DEFINE(M_ELI, "eli data", "GEOM_ELI Data");
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SYSCTL_DECL(_kern_geom);
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SYSCTL_NODE(_kern_geom, OID_AUTO, eli, CTLFLAG_RW, 0, "GEOM_ELI stuff");
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2005-07-27 21:48:47 +00:00
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u_int g_eli_debug = 0;
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2005-07-27 21:43:37 +00:00
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TUNABLE_INT("kern.geom.eli.debug", &g_eli_debug);
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SYSCTL_UINT(_kern_geom_eli, OID_AUTO, debug, CTLFLAG_RW, &g_eli_debug, 0,
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"Debug level");
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static u_int g_eli_tries = 3;
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TUNABLE_INT("kern.geom.eli.tries", &g_eli_tries);
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SYSCTL_UINT(_kern_geom_eli, OID_AUTO, tries, CTLFLAG_RW, &g_eli_tries, 0,
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2006-02-07 17:23:22 +00:00
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"Number of tries for entering the passphrase");
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2005-07-27 21:43:37 +00:00
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static u_int g_eli_visible_passphrase = 0;
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TUNABLE_INT("kern.geom.eli.visible_passphrase", &g_eli_visible_passphrase);
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SYSCTL_UINT(_kern_geom_eli, OID_AUTO, visible_passphrase, CTLFLAG_RW,
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&g_eli_visible_passphrase, 0,
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2006-02-07 17:23:22 +00:00
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"Turn on echo when entering the passphrase (for debug purposes only!!)");
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2005-07-27 21:43:37 +00:00
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u_int g_eli_overwrites = 5;
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SYSCTL_UINT(_kern_geom_eli, OID_AUTO, overwrites, CTLFLAG_RW, &g_eli_overwrites,
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2006-02-07 17:23:22 +00:00
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0, "Number of times on-disk keys should be overwritten when destroying them");
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2005-08-21 18:12:51 +00:00
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static u_int g_eli_threads = 0;
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2005-07-27 21:43:37 +00:00
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TUNABLE_INT("kern.geom.eli.threads", &g_eli_threads);
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SYSCTL_UINT(_kern_geom_eli, OID_AUTO, threads, CTLFLAG_RW, &g_eli_threads, 0,
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"Number of threads doing crypto work");
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static int g_eli_destroy_geom(struct gctl_req *req, struct g_class *mp,
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struct g_geom *gp);
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2005-08-17 15:25:57 +00:00
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static void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp);
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2005-07-27 21:43:37 +00:00
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static g_taste_t g_eli_taste;
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static g_dumpconf_t g_eli_dumpconf;
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struct g_class g_eli_class = {
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.name = G_ELI_CLASS_NAME,
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.version = G_VERSION,
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.ctlreq = g_eli_config,
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.taste = g_eli_taste,
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.destroy_geom = g_eli_destroy_geom
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};
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/*
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* Code paths:
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* BIO_READ:
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* g_eli_start -> g_io_request -> g_eli_read_done -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver
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* BIO_WRITE:
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* g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver
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*/
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/*
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* EAGAIN from crypto(9) means, that we were probably balanced to another crypto
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* accelerator or something like this.
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* The function updates the SID and rerun the operation.
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*/
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static int
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g_eli_crypto_rerun(struct cryptop *crp)
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{
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struct g_eli_softc *sc;
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struct g_eli_worker *wr;
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struct bio *bp;
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int error;
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bp = (struct bio *)crp->crp_opaque;
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sc = bp->bio_to->geom->softc;
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LIST_FOREACH(wr, &sc->sc_workers, w_next) {
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if (wr->w_number == bp->bio_pflags)
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break;
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}
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KASSERT(wr != NULL, ("Invalid worker (%u).", bp->bio_pflags));
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2006-02-07 17:23:22 +00:00
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G_ELI_DEBUG(1, "Rerunning crypto %s request (sid: %ju -> %ju).",
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2005-07-27 21:43:37 +00:00
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bp->bio_cmd == BIO_READ ? "READ" : "WRITE", (uintmax_t)wr->w_sid,
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(uintmax_t)crp->crp_sid);
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wr->w_sid = crp->crp_sid;
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crp->crp_etype = 0;
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error = crypto_dispatch(crp);
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if (error == 0)
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return (0);
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G_ELI_DEBUG(1, "%s: crypto_dispatch() returned %d.", __func__, error);
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crp->crp_etype = error;
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return (error);
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}
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/*
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* The function is called afer reading encrypted data from the provider.
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2005-08-13 17:45:37 +00:00
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*
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* g_eli_start -> g_io_request -> G_ELI_READ_DONE -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver
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2005-07-27 21:43:37 +00:00
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*/
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static void
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g_eli_read_done(struct bio *bp)
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{
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struct g_eli_softc *sc;
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struct bio *pbp;
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G_ELI_LOGREQ(2, bp, "Request done.");
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pbp = bp->bio_parent;
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if (pbp->bio_error == 0)
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pbp->bio_error = bp->bio_error;
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g_destroy_bio(bp);
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if (pbp->bio_error != 0) {
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G_ELI_LOGREQ(0, pbp, "%s() failed", __func__);
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pbp->bio_completed = 0;
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g_io_deliver(pbp, pbp->bio_error);
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return;
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}
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sc = pbp->bio_to->geom->softc;
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2005-08-17 15:25:57 +00:00
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mtx_lock(&sc->sc_queue_mtx);
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bioq_insert_tail(&sc->sc_queue, pbp);
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mtx_unlock(&sc->sc_queue_mtx);
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wakeup(sc);
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2005-07-27 21:43:37 +00:00
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}
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/*
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* The function is called after we read and decrypt data.
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2005-08-13 17:45:37 +00:00
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*
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* g_eli_start -> g_io_request -> g_eli_read_done -> g_eli_crypto_run -> G_ELI_CRYPTO_READ_DONE -> g_io_deliver
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2005-07-27 21:43:37 +00:00
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*/
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static int
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g_eli_crypto_read_done(struct cryptop *crp)
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{
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struct bio *bp;
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if (crp->crp_etype == EAGAIN) {
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if (g_eli_crypto_rerun(crp) == 0)
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return (0);
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}
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bp = (struct bio *)crp->crp_opaque;
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bp->bio_inbed++;
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if (crp->crp_etype == 0) {
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G_ELI_DEBUG(3, "Crypto READ request done (%d/%d).",
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bp->bio_inbed, bp->bio_children);
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bp->bio_completed += crp->crp_olen;
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} else {
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G_ELI_DEBUG(1, "Crypto READ request failed (%d/%d) error=%d.",
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bp->bio_inbed, bp->bio_children, crp->crp_etype);
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if (bp->bio_error == 0)
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bp->bio_error = crp->crp_etype;
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}
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/*
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* Do we have all sectors already?
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*/
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if (bp->bio_inbed < bp->bio_children)
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return (0);
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free(bp->bio_driver2, M_ELI);
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bp->bio_driver2 = NULL;
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if (bp->bio_error != 0) {
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G_ELI_LOGREQ(0, bp, "Crypto READ request failed (error=%d).",
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bp->bio_error);
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bp->bio_completed = 0;
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}
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/*
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* Read is finished, send it up.
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*/
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g_io_deliver(bp, bp->bio_error);
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return (0);
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}
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/*
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* The function is called after we encrypt and write data.
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2005-08-13 17:45:37 +00:00
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*
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* g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> G_ELI_WRITE_DONE -> g_io_deliver
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2005-07-27 21:43:37 +00:00
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*/
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static void
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g_eli_write_done(struct bio *bp)
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{
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struct bio *pbp;
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G_ELI_LOGREQ(2, bp, "Request done.");
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pbp = bp->bio_parent;
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if (pbp->bio_error == 0)
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pbp->bio_error = bp->bio_error;
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free(pbp->bio_driver2, M_ELI);
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pbp->bio_driver2 = NULL;
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if (pbp->bio_error == 0)
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pbp->bio_completed = pbp->bio_length;
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else {
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2005-09-10 07:46:47 +00:00
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G_ELI_LOGREQ(0, pbp, "Crypto WRITE request failed (error=%d).",
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2005-07-27 21:43:37 +00:00
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pbp->bio_error);
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pbp->bio_completed = 0;
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}
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g_destroy_bio(bp);
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/*
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* Write is finished, send it up.
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*/
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g_io_deliver(pbp, pbp->bio_error);
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}
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/*
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* The function is called after data encryption.
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2005-08-13 17:45:37 +00:00
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*
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* g_eli_start -> g_eli_crypto_run -> G_ELI_CRYPTO_WRITE_DONE -> g_io_request -> g_eli_write_done -> g_io_deliver
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2005-07-27 21:43:37 +00:00
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*/
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static int
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g_eli_crypto_write_done(struct cryptop *crp)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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struct bio *bp, *cbp;
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if (crp->crp_etype == EAGAIN) {
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if (g_eli_crypto_rerun(crp) == 0)
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return (0);
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}
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bp = (struct bio *)crp->crp_opaque;
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bp->bio_inbed++;
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if (crp->crp_etype == 0) {
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G_ELI_DEBUG(3, "Crypto WRITE request done (%d/%d).",
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bp->bio_inbed, bp->bio_children);
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} else {
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G_ELI_DEBUG(1, "Crypto WRITE request failed (%d/%d) error=%d.",
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bp->bio_inbed, bp->bio_children, crp->crp_etype);
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if (bp->bio_error == 0)
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bp->bio_error = crp->crp_etype;
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}
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/*
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* All sectors are already encrypted?
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*/
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if (bp->bio_inbed < bp->bio_children)
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return (0);
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bp->bio_inbed = 0;
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bp->bio_children = 1;
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cbp = bp->bio_driver1;
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bp->bio_driver1 = NULL;
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if (bp->bio_error != 0) {
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G_ELI_LOGREQ(0, bp, "Crypto WRITE request failed (error=%d).",
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bp->bio_error);
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free(bp->bio_driver2, M_ELI);
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bp->bio_driver2 = NULL;
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g_destroy_bio(cbp);
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g_io_deliver(bp, bp->bio_error);
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return (0);
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}
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cbp->bio_data = bp->bio_driver2;
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cbp->bio_done = g_eli_write_done;
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gp = bp->bio_to->geom;
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cp = LIST_FIRST(&gp->consumer);
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cbp->bio_to = cp->provider;
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G_ELI_LOGREQ(2, cbp, "Sending request.");
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/*
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* Send encrypted data to the provider.
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*/
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g_io_request(cbp, cp);
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return (0);
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}
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/*
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* This function should never be called, but GEOM made as it set ->orphan()
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* method for every geom.
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*/
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static void
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g_eli_orphan_spoil_assert(struct g_consumer *cp)
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{
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panic("Function %s() called for %s.", __func__, cp->geom->name);
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}
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static void
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g_eli_orphan(struct g_consumer *cp)
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{
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struct g_eli_softc *sc;
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g_topology_assert();
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sc = cp->geom->softc;
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if (sc == NULL)
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return;
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g_eli_destroy(sc, 1);
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}
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|
|
2005-08-13 17:45:37 +00:00
|
|
|
/*
|
|
|
|
* BIO_READ : G_ELI_START -> g_io_request -> g_eli_read_done -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver
|
|
|
|
* BIO_WRITE: G_ELI_START -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver
|
|
|
|
*/
|
2006-02-01 12:06:01 +00:00
|
|
|
static void
|
2005-07-27 21:43:37 +00:00
|
|
|
g_eli_start(struct bio *bp)
|
2006-02-01 12:06:01 +00:00
|
|
|
{
|
2005-07-27 21:43:37 +00:00
|
|
|
struct g_eli_softc *sc;
|
2006-04-12 12:18:44 +00:00
|
|
|
struct g_consumer *cp;
|
2005-07-27 21:43:37 +00:00
|
|
|
struct bio *cbp;
|
|
|
|
|
|
|
|
sc = bp->bio_to->geom->softc;
|
|
|
|
KASSERT(sc != NULL,
|
|
|
|
("Provider's error should be set (error=%d)(device=%s).",
|
|
|
|
bp->bio_to->error, bp->bio_to->name));
|
|
|
|
G_ELI_LOGREQ(2, bp, "Request received.");
|
|
|
|
|
|
|
|
switch (bp->bio_cmd) {
|
|
|
|
case BIO_READ:
|
|
|
|
case BIO_WRITE:
|
2006-04-12 12:18:44 +00:00
|
|
|
case BIO_GETATTR:
|
2005-07-27 21:43:37 +00:00
|
|
|
break;
|
|
|
|
case BIO_DELETE:
|
|
|
|
/*
|
|
|
|
* We could eventually support BIO_DELETE request.
|
|
|
|
* It could be done by overwritting requested sector with
|
|
|
|
* random data g_eli_overwrites number of times.
|
|
|
|
*/
|
|
|
|
default:
|
|
|
|
g_io_deliver(bp, EOPNOTSUPP);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
cbp = g_clone_bio(bp);
|
|
|
|
if (cbp == NULL) {
|
|
|
|
g_io_deliver(bp, ENOMEM);
|
|
|
|
return;
|
|
|
|
}
|
2006-04-12 12:18:44 +00:00
|
|
|
switch (bp->bio_cmd) {
|
|
|
|
case BIO_READ:
|
2005-07-27 21:43:37 +00:00
|
|
|
cbp->bio_done = g_eli_read_done;
|
|
|
|
cp = LIST_FIRST(&sc->sc_geom->consumer);
|
|
|
|
cbp->bio_to = cp->provider;
|
2006-04-15 18:30:42 +00:00
|
|
|
G_ELI_LOGREQ(2, cbp, "Sending request.");
|
2005-07-27 21:43:37 +00:00
|
|
|
/*
|
|
|
|
* Read encrypted data from provider.
|
|
|
|
*/
|
|
|
|
g_io_request(cbp, cp);
|
2006-04-12 12:18:44 +00:00
|
|
|
break;
|
|
|
|
case BIO_WRITE:
|
2005-07-27 21:43:37 +00:00
|
|
|
bp->bio_driver1 = cbp;
|
2005-08-17 15:25:57 +00:00
|
|
|
mtx_lock(&sc->sc_queue_mtx);
|
|
|
|
bioq_insert_tail(&sc->sc_queue, bp);
|
|
|
|
mtx_unlock(&sc->sc_queue_mtx);
|
|
|
|
wakeup(sc);
|
2006-04-12 12:18:44 +00:00
|
|
|
break;
|
|
|
|
case BIO_GETATTR:
|
|
|
|
cbp->bio_done = g_std_done;
|
|
|
|
cp = LIST_FIRST(&sc->sc_geom->consumer);
|
|
|
|
cbp->bio_to = cp->provider;
|
2006-04-15 18:30:42 +00:00
|
|
|
G_ELI_LOGREQ(2, cbp, "Sending request.");
|
2006-04-12 12:18:44 +00:00
|
|
|
g_io_request(cbp, cp);
|
|
|
|
break;
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the main function for kernel worker thread when we don't have
|
|
|
|
* hardware acceleration and we have to do cryptography in software.
|
|
|
|
* Dedicated thread is needed, so we don't slow down g_up/g_down GEOM
|
|
|
|
* threads with crypto work.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
g_eli_worker(void *arg)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
struct g_eli_worker *wr;
|
|
|
|
struct bio *bp;
|
|
|
|
|
|
|
|
wr = arg;
|
|
|
|
sc = wr->w_softc;
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
|
|
sched_prio(curthread, PRIBIO);
|
2005-08-21 18:12:51 +00:00
|
|
|
if (sc->sc_crypto == G_ELI_CRYPTO_SW && g_eli_threads == 0)
|
|
|
|
sched_bind(curthread, wr->w_number);
|
2005-07-27 21:43:37 +00:00
|
|
|
mtx_unlock_spin(&sched_lock);
|
2006-02-01 12:06:01 +00:00
|
|
|
|
2005-07-27 21:43:37 +00:00
|
|
|
G_ELI_DEBUG(1, "Thread %s started.", curthread->td_proc->p_comm);
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
mtx_lock(&sc->sc_queue_mtx);
|
|
|
|
bp = bioq_takefirst(&sc->sc_queue);
|
|
|
|
if (bp == NULL) {
|
|
|
|
if ((sc->sc_flags & G_ELI_FLAG_DESTROY) != 0) {
|
|
|
|
LIST_REMOVE(wr, w_next);
|
|
|
|
crypto_freesession(wr->w_sid);
|
|
|
|
free(wr, M_ELI);
|
|
|
|
G_ELI_DEBUG(1, "Thread %s exiting.",
|
|
|
|
curthread->td_proc->p_comm);
|
|
|
|
wakeup(&sc->sc_workers);
|
|
|
|
mtx_unlock(&sc->sc_queue_mtx);
|
|
|
|
kthread_exit(0);
|
|
|
|
}
|
|
|
|
msleep(sc, &sc->sc_queue_mtx, PRIBIO | PDROP,
|
|
|
|
"geli:w", 0);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
mtx_unlock(&sc->sc_queue_mtx);
|
2005-08-17 15:25:57 +00:00
|
|
|
g_eli_crypto_run(wr, bp);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Here we generate IV. It is unique for every sector.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
|
|
|
|
size_t size)
|
|
|
|
{
|
|
|
|
u_char hash[SHA256_DIGEST_LENGTH];
|
|
|
|
SHA256_CTX ctx;
|
|
|
|
|
|
|
|
/* Copy precalculated SHA256 context for IV-Key. */
|
|
|
|
bcopy(&sc->sc_ivctx, &ctx, sizeof(ctx));
|
|
|
|
SHA256_Update(&ctx, (uint8_t *)&offset, sizeof(offset));
|
|
|
|
SHA256_Final(hash, &ctx);
|
|
|
|
bcopy(hash, iv, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the main function responsible for cryptography (ie. communication
|
|
|
|
* with crypto(9) subsystem).
|
|
|
|
*/
|
2005-08-17 15:25:57 +00:00
|
|
|
static void
|
2005-07-27 21:43:37 +00:00
|
|
|
g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
struct cryptop *crp;
|
|
|
|
struct cryptodesc *crd;
|
|
|
|
struct uio *uio;
|
|
|
|
struct iovec *iov;
|
|
|
|
u_int i, nsec, add, secsize;
|
2006-01-17 07:26:48 +00:00
|
|
|
int err, error;
|
2005-07-27 21:43:37 +00:00
|
|
|
size_t size;
|
|
|
|
u_char *p, *data;
|
|
|
|
|
|
|
|
G_ELI_LOGREQ(3, bp, "%s", __func__);
|
|
|
|
|
|
|
|
bp->bio_pflags = wr->w_number;
|
|
|
|
sc = wr->w_softc;
|
|
|
|
secsize = LIST_FIRST(&sc->sc_geom->provider)->sectorsize;
|
|
|
|
nsec = bp->bio_length / secsize;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Calculate how much memory do we need.
|
|
|
|
* We need separate crypto operation for every single sector.
|
|
|
|
* It is much faster to calculate total amount of needed memory here and
|
2006-04-05 22:07:31 +00:00
|
|
|
* do the allocation once instead of allocating memory in pieces (many,
|
2005-07-27 21:43:37 +00:00
|
|
|
* many pieces).
|
|
|
|
*/
|
|
|
|
size = sizeof(*crp) * nsec;
|
|
|
|
size += sizeof(*crd) * nsec;
|
|
|
|
size += sizeof(*uio) * nsec;
|
|
|
|
size += sizeof(*iov) * nsec;
|
|
|
|
/*
|
|
|
|
* If we write the data we cannot destroy current bio_data content,
|
|
|
|
* so we need to allocate more memory for encrypted data.
|
|
|
|
*/
|
|
|
|
if (bp->bio_cmd == BIO_WRITE)
|
|
|
|
size += bp->bio_length;
|
2005-08-17 15:25:57 +00:00
|
|
|
p = malloc(size, M_ELI, M_WAITOK);
|
2005-07-27 21:43:37 +00:00
|
|
|
|
|
|
|
bp->bio_inbed = 0;
|
|
|
|
bp->bio_children = nsec;
|
|
|
|
bp->bio_driver2 = p;
|
|
|
|
|
|
|
|
if (bp->bio_cmd == BIO_READ)
|
|
|
|
data = bp->bio_data;
|
|
|
|
else {
|
|
|
|
data = p;
|
|
|
|
p += bp->bio_length;
|
|
|
|
bcopy(bp->bio_data, data, bp->bio_length);
|
|
|
|
}
|
|
|
|
|
|
|
|
error = 0;
|
|
|
|
for (i = 0, add = 0; i < nsec; i++, add += secsize) {
|
|
|
|
crp = (struct cryptop *)p; p += sizeof(*crp);
|
|
|
|
crd = (struct cryptodesc *)p; p += sizeof(*crd);
|
|
|
|
uio = (struct uio *)p; p += sizeof(*uio);
|
|
|
|
iov = (struct iovec *)p; p += sizeof(*iov);
|
|
|
|
|
|
|
|
iov->iov_len = secsize;
|
|
|
|
iov->iov_base = data;
|
|
|
|
data += secsize;
|
|
|
|
|
|
|
|
uio->uio_iov = iov;
|
|
|
|
uio->uio_iovcnt = 1;
|
|
|
|
uio->uio_segflg = UIO_SYSSPACE;
|
|
|
|
uio->uio_resid = secsize;
|
|
|
|
|
|
|
|
crp->crp_sid = wr->w_sid;
|
|
|
|
crp->crp_ilen = secsize;
|
|
|
|
crp->crp_olen = secsize;
|
|
|
|
crp->crp_opaque = (void *)bp;
|
|
|
|
crp->crp_buf = (void *)uio;
|
|
|
|
if (bp->bio_cmd == BIO_WRITE)
|
|
|
|
crp->crp_callback = g_eli_crypto_write_done;
|
|
|
|
else /* if (bp->bio_cmd == BIO_READ) */
|
|
|
|
crp->crp_callback = g_eli_crypto_read_done;
|
|
|
|
crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIFSYNC | CRYPTO_F_REL;
|
|
|
|
crp->crp_desc = crd;
|
|
|
|
|
|
|
|
crd->crd_skip = 0;
|
|
|
|
crd->crd_len = secsize;
|
2006-04-20 06:33:46 +00:00
|
|
|
crd->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
|
2005-07-27 21:43:37 +00:00
|
|
|
if (bp->bio_cmd == BIO_WRITE)
|
|
|
|
crd->crd_flags |= CRD_F_ENCRYPT;
|
|
|
|
crd->crd_alg = sc->sc_algo;
|
|
|
|
crd->crd_key = sc->sc_datakey;
|
|
|
|
crd->crd_klen = sc->sc_keylen;
|
|
|
|
g_eli_crypto_ivgen(sc, bp->bio_offset + add, crd->crd_iv,
|
|
|
|
sizeof(crd->crd_iv));
|
|
|
|
crd->crd_next = NULL;
|
|
|
|
|
2005-09-10 07:45:10 +00:00
|
|
|
crp->crp_etype = 0;
|
2005-07-27 21:43:37 +00:00
|
|
|
err = crypto_dispatch(crp);
|
2005-08-17 14:34:52 +00:00
|
|
|
if (error == 0)
|
|
|
|
error = err;
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
if (bp->bio_error == 0)
|
|
|
|
bp->bio_error = error;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
g_eli_read_metadata(struct g_class *mp, struct g_provider *pp,
|
|
|
|
struct g_eli_metadata *md)
|
|
|
|
{
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct g_consumer *cp;
|
|
|
|
u_char *buf = NULL;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
g_topology_assert();
|
|
|
|
|
|
|
|
gp = g_new_geomf(mp, "eli:taste");
|
|
|
|
gp->start = g_eli_start;
|
|
|
|
gp->access = g_std_access;
|
|
|
|
/*
|
|
|
|
* g_eli_read_metadata() is always called from the event thread.
|
|
|
|
* Our geom is created and destroyed in the same event, so there
|
|
|
|
* could be no orphan nor spoil event in the meantime.
|
|
|
|
*/
|
|
|
|
gp->orphan = g_eli_orphan_spoil_assert;
|
|
|
|
gp->spoiled = g_eli_orphan_spoil_assert;
|
|
|
|
cp = g_new_consumer(gp);
|
|
|
|
error = g_attach(cp, pp);
|
|
|
|
if (error != 0)
|
|
|
|
goto end;
|
|
|
|
error = g_access(cp, 1, 0, 0);
|
|
|
|
if (error != 0)
|
|
|
|
goto end;
|
|
|
|
g_topology_unlock();
|
|
|
|
buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
|
|
|
|
&error);
|
|
|
|
g_topology_lock();
|
2005-11-30 19:24:51 +00:00
|
|
|
if (buf == NULL)
|
2005-07-27 21:43:37 +00:00
|
|
|
goto end;
|
|
|
|
eli_metadata_decode(buf, md);
|
|
|
|
end:
|
|
|
|
if (buf != NULL)
|
|
|
|
g_free(buf);
|
|
|
|
if (cp->provider != NULL) {
|
|
|
|
if (cp->acr == 1)
|
|
|
|
g_access(cp, -1, 0, 0);
|
|
|
|
g_detach(cp);
|
|
|
|
}
|
|
|
|
g_destroy_consumer(cp);
|
|
|
|
g_destroy_geom(gp);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The function is called when we had last close on provider and user requested
|
|
|
|
* to close it when this situation occur.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
g_eli_last_close(struct g_eli_softc *sc)
|
|
|
|
{
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct g_provider *pp;
|
|
|
|
char ppname[64];
|
|
|
|
int error;
|
|
|
|
|
|
|
|
g_topology_assert();
|
|
|
|
gp = sc->sc_geom;
|
|
|
|
pp = LIST_FIRST(&gp->provider);
|
|
|
|
strlcpy(ppname, pp->name, sizeof(ppname));
|
|
|
|
error = g_eli_destroy(sc, 1);
|
|
|
|
KASSERT(error == 0, ("Cannot detach %s on last close (error=%d).",
|
|
|
|
ppname, error));
|
|
|
|
G_ELI_DEBUG(0, "Detached %s on last close.", ppname);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
g_eli_access(struct g_provider *pp, int dr, int dw, int de)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
struct g_geom *gp;
|
|
|
|
|
|
|
|
gp = pp->geom;
|
|
|
|
sc = gp->softc;
|
|
|
|
|
|
|
|
if (dw > 0) {
|
|
|
|
/* Someone is opening us for write, we need to remember that. */
|
|
|
|
sc->sc_flags |= G_ELI_FLAG_WOPEN;
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
/* Is this the last close? */
|
|
|
|
if (pp->acr + dr > 0 || pp->acw + dw > 0 || pp->ace + de > 0)
|
|
|
|
return (0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Automatically detach on last close if requested.
|
|
|
|
*/
|
|
|
|
if ((sc->sc_flags & G_ELI_FLAG_RW_DETACH) ||
|
|
|
|
(sc->sc_flags & G_ELI_FLAG_WOPEN)) {
|
|
|
|
g_eli_last_close(sc);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct g_geom *
|
|
|
|
g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp,
|
|
|
|
const struct g_eli_metadata *md, const u_char *mkey, int nkey)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
struct g_eli_worker *wr;
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct g_provider *pp;
|
|
|
|
struct g_consumer *cp;
|
|
|
|
struct cryptoini cri;
|
|
|
|
u_int i, threads;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
G_ELI_DEBUG(1, "Creating device %s%s.", bpp->name, G_ELI_SUFFIX);
|
|
|
|
|
|
|
|
gp = g_new_geomf(mp, "%s%s", bpp->name, G_ELI_SUFFIX);
|
|
|
|
gp->softc = NULL; /* for a moment */
|
|
|
|
|
|
|
|
sc = malloc(sizeof(*sc), M_ELI, M_WAITOK | M_ZERO);
|
|
|
|
gp->start = g_eli_start;
|
|
|
|
/*
|
|
|
|
* Spoiling cannot happen actually, because we keep provider open for
|
|
|
|
* writing all the time.
|
|
|
|
*/
|
|
|
|
gp->spoiled = g_eli_orphan_spoil_assert;
|
|
|
|
gp->orphan = g_eli_orphan;
|
|
|
|
/*
|
|
|
|
* If detach-on-last-close feature is not enabled, we can simply use
|
|
|
|
* g_std_access().
|
|
|
|
*/
|
|
|
|
if (md->md_flags & G_ELI_FLAG_WO_DETACH)
|
|
|
|
gp->access = g_eli_access;
|
|
|
|
else
|
|
|
|
gp->access = g_std_access;
|
|
|
|
gp->dumpconf = g_eli_dumpconf;
|
|
|
|
|
|
|
|
sc->sc_crypto = G_ELI_CRYPTO_SW;
|
|
|
|
sc->sc_flags = md->md_flags;
|
|
|
|
sc->sc_algo = md->md_algo;
|
|
|
|
sc->sc_nkey = nkey;
|
|
|
|
/*
|
|
|
|
* Remember the keys in our softc structure.
|
|
|
|
*/
|
|
|
|
bcopy(mkey, sc->sc_ivkey, sizeof(sc->sc_ivkey));
|
|
|
|
mkey += sizeof(sc->sc_ivkey);
|
|
|
|
bcopy(mkey, sc->sc_datakey, sizeof(sc->sc_datakey));
|
|
|
|
sc->sc_keylen = md->md_keylen;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Precalculate SHA256 for IV generation.
|
|
|
|
* This is expensive operation and we can do it only once now or for
|
|
|
|
* every access to sector, so now will be much better.
|
|
|
|
*/
|
|
|
|
SHA256_Init(&sc->sc_ivctx);
|
|
|
|
SHA256_Update(&sc->sc_ivctx, sc->sc_ivkey, sizeof(sc->sc_ivkey));
|
|
|
|
|
|
|
|
gp->softc = sc;
|
|
|
|
sc->sc_geom = gp;
|
|
|
|
|
|
|
|
bioq_init(&sc->sc_queue);
|
|
|
|
mtx_init(&sc->sc_queue_mtx, "geli:queue", NULL, MTX_DEF);
|
|
|
|
|
|
|
|
pp = NULL;
|
|
|
|
cp = g_new_consumer(gp);
|
|
|
|
error = g_attach(cp, bpp);
|
|
|
|
if (error != 0) {
|
|
|
|
if (req != NULL) {
|
|
|
|
gctl_error(req, "Cannot attach to %s (error=%d).",
|
|
|
|
bpp->name, error);
|
|
|
|
} else {
|
|
|
|
G_ELI_DEBUG(1, "Cannot attach to %s (error=%d).",
|
|
|
|
bpp->name, error);
|
|
|
|
}
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Keep provider open all the time, so we can run critical tasks,
|
|
|
|
* like Master Keys deletion, without wondering if we can open
|
|
|
|
* provider or not.
|
|
|
|
*/
|
|
|
|
error = g_access(cp, 1, 1, 1);
|
|
|
|
if (error != 0) {
|
|
|
|
if (req != NULL) {
|
|
|
|
gctl_error(req, "Cannot access %s (error=%d).",
|
|
|
|
bpp->name, error);
|
|
|
|
} else {
|
|
|
|
G_ELI_DEBUG(1, "Cannot access %s (error=%d).",
|
|
|
|
bpp->name, error);
|
|
|
|
}
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
LIST_INIT(&sc->sc_workers);
|
|
|
|
|
|
|
|
bzero(&cri, sizeof(cri));
|
|
|
|
cri.cri_alg = sc->sc_algo;
|
|
|
|
cri.cri_klen = sc->sc_keylen;
|
|
|
|
cri.cri_key = sc->sc_datakey;
|
|
|
|
|
|
|
|
threads = g_eli_threads;
|
2005-08-21 18:12:51 +00:00
|
|
|
if (threads == 0)
|
|
|
|
threads = mp_ncpus;
|
|
|
|
else if (threads > mp_ncpus) {
|
|
|
|
/* There is really no need for too many worker threads. */
|
|
|
|
threads = mp_ncpus;
|
|
|
|
G_ELI_DEBUG(0, "Reducing number of threads to %u.", threads);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
for (i = 0; i < threads; i++) {
|
|
|
|
wr = malloc(sizeof(*wr), M_ELI, M_WAITOK | M_ZERO);
|
|
|
|
wr->w_softc = sc;
|
|
|
|
wr->w_number = i;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If this is the first pass, try to get hardware support.
|
|
|
|
* Use software cryptography, if we cannot get it.
|
|
|
|
*/
|
|
|
|
if (i == 0) {
|
|
|
|
error = crypto_newsession(&wr->w_sid, &cri, 1);
|
2005-08-17 15:25:57 +00:00
|
|
|
if (error == 0)
|
2005-07-27 21:43:37 +00:00
|
|
|
sc->sc_crypto = G_ELI_CRYPTO_HW;
|
|
|
|
}
|
2005-08-17 15:25:57 +00:00
|
|
|
if (sc->sc_crypto == G_ELI_CRYPTO_SW)
|
|
|
|
error = crypto_newsession(&wr->w_sid, &cri, 0);
|
2005-07-27 21:43:37 +00:00
|
|
|
if (error != 0) {
|
|
|
|
free(wr, M_ELI);
|
|
|
|
if (req != NULL) {
|
2006-02-07 17:23:22 +00:00
|
|
|
gctl_error(req, "Cannot set up crypto session "
|
2005-07-27 21:43:37 +00:00
|
|
|
"for %s (error=%d).", bpp->name, error);
|
|
|
|
} else {
|
2006-02-07 17:23:22 +00:00
|
|
|
G_ELI_DEBUG(1, "Cannot set up crypto session "
|
2005-07-27 21:43:37 +00:00
|
|
|
"for %s (error=%d).", bpp->name, error);
|
|
|
|
}
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = kthread_create(g_eli_worker, wr, &wr->w_proc, 0, 0,
|
|
|
|
"g_eli[%u] %s", i, bpp->name);
|
|
|
|
if (error != 0) {
|
|
|
|
crypto_freesession(wr->w_sid);
|
|
|
|
free(wr, M_ELI);
|
|
|
|
if (req != NULL) {
|
2005-08-17 15:25:57 +00:00
|
|
|
gctl_error(req, "Cannot create kernel thread "
|
|
|
|
"for %s (error=%d).", bpp->name, error);
|
2005-07-27 21:43:37 +00:00
|
|
|
} else {
|
2005-08-17 15:25:57 +00:00
|
|
|
G_ELI_DEBUG(1, "Cannot create kernel thread "
|
|
|
|
"for %s (error=%d).", bpp->name, error);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
goto failed;
|
|
|
|
}
|
|
|
|
LIST_INSERT_HEAD(&sc->sc_workers, wr, w_next);
|
2005-08-17 15:25:57 +00:00
|
|
|
/* If we have hardware support, one thread is enough. */
|
|
|
|
if (sc->sc_crypto == G_ELI_CRYPTO_HW)
|
|
|
|
break;
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create decrypted provider.
|
|
|
|
*/
|
|
|
|
pp = g_new_providerf(gp, "%s%s", bpp->name, G_ELI_SUFFIX);
|
|
|
|
pp->sectorsize = md->md_sectorsize;
|
|
|
|
pp->mediasize = bpp->mediasize;
|
|
|
|
if ((sc->sc_flags & G_ELI_FLAG_ONETIME) == 0)
|
|
|
|
pp->mediasize -= bpp->sectorsize;
|
|
|
|
pp->mediasize -= (pp->mediasize % pp->sectorsize);
|
|
|
|
g_error_provider(pp, 0);
|
|
|
|
|
|
|
|
G_ELI_DEBUG(0, "Device %s created.", pp->name);
|
|
|
|
G_ELI_DEBUG(0, " Cipher: %s", g_eli_algo2str(sc->sc_algo));
|
|
|
|
G_ELI_DEBUG(0, "Key length: %u", sc->sc_keylen);
|
|
|
|
G_ELI_DEBUG(0, " Crypto: %s",
|
|
|
|
sc->sc_crypto == G_ELI_CRYPTO_SW ? "software" : "hardware");
|
|
|
|
return (gp);
|
|
|
|
failed:
|
2005-08-17 15:25:57 +00:00
|
|
|
mtx_lock(&sc->sc_queue_mtx);
|
|
|
|
sc->sc_flags |= G_ELI_FLAG_DESTROY;
|
|
|
|
wakeup(sc);
|
|
|
|
/*
|
|
|
|
* Wait for kernel threads self destruction.
|
|
|
|
*/
|
|
|
|
while (!LIST_EMPTY(&sc->sc_workers)) {
|
|
|
|
msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO,
|
|
|
|
"geli:destroy", 0);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
mtx_destroy(&sc->sc_queue_mtx);
|
|
|
|
if (cp->provider != NULL) {
|
|
|
|
if (cp->acr == 1)
|
|
|
|
g_access(cp, -1, -1, -1);
|
|
|
|
g_detach(cp);
|
|
|
|
}
|
|
|
|
g_destroy_consumer(cp);
|
|
|
|
g_destroy_geom(gp);
|
|
|
|
bzero(sc, sizeof(*sc));
|
|
|
|
free(sc, M_ELI);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
g_eli_destroy(struct g_eli_softc *sc, boolean_t force)
|
|
|
|
{
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct g_provider *pp;
|
|
|
|
|
|
|
|
g_topology_assert();
|
|
|
|
|
|
|
|
if (sc == NULL)
|
|
|
|
return (ENXIO);
|
|
|
|
|
|
|
|
gp = sc->sc_geom;
|
|
|
|
pp = LIST_FIRST(&gp->provider);
|
|
|
|
if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
|
|
|
|
if (force) {
|
|
|
|
G_ELI_DEBUG(1, "Device %s is still open, so it "
|
2006-02-07 17:23:22 +00:00
|
|
|
"cannot be definitely removed.", pp->name);
|
2005-07-27 21:43:37 +00:00
|
|
|
} else {
|
|
|
|
G_ELI_DEBUG(1,
|
|
|
|
"Device %s is still open (r%dw%de%d).", pp->name,
|
|
|
|
pp->acr, pp->acw, pp->ace);
|
|
|
|
return (EBUSY);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-08-17 15:25:57 +00:00
|
|
|
mtx_lock(&sc->sc_queue_mtx);
|
|
|
|
sc->sc_flags |= G_ELI_FLAG_DESTROY;
|
|
|
|
wakeup(sc);
|
|
|
|
while (!LIST_EMPTY(&sc->sc_workers)) {
|
|
|
|
msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO,
|
|
|
|
"geli:destroy", 0);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
mtx_destroy(&sc->sc_queue_mtx);
|
|
|
|
gp->softc = NULL;
|
|
|
|
bzero(sc, sizeof(*sc));
|
|
|
|
free(sc, M_ELI);
|
|
|
|
|
|
|
|
if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0))
|
|
|
|
G_ELI_DEBUG(0, "Device %s destroyed.", gp->name);
|
|
|
|
g_wither_geom_close(gp, ENXIO);
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
g_eli_destroy_geom(struct gctl_req *req __unused,
|
|
|
|
struct g_class *mp __unused, struct g_geom *gp)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
|
|
|
|
sc = gp->softc;
|
|
|
|
return (g_eli_destroy(sc, 0));
|
|
|
|
}
|
|
|
|
|
2006-02-11 13:08:24 +00:00
|
|
|
static int
|
|
|
|
g_eli_keyfiles_load(struct hmac_ctx *ctx, const char *provider)
|
|
|
|
{
|
|
|
|
u_char *keyfile, *data, *size;
|
|
|
|
char *file, name[64];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; ; i++) {
|
|
|
|
snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i);
|
|
|
|
keyfile = preload_search_by_type(name);
|
|
|
|
if (keyfile == NULL)
|
|
|
|
return (i); /* Return number of loaded keyfiles. */
|
|
|
|
data = preload_search_info(keyfile, MODINFO_ADDR);
|
|
|
|
if (data == NULL) {
|
|
|
|
G_ELI_DEBUG(0, "Cannot find key file data for %s.",
|
|
|
|
name);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
data = *(void **)data;
|
|
|
|
size = preload_search_info(keyfile, MODINFO_SIZE);
|
|
|
|
if (size == NULL) {
|
|
|
|
G_ELI_DEBUG(0, "Cannot find key file size for %s.",
|
|
|
|
name);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
file = preload_search_info(keyfile, MODINFO_NAME);
|
|
|
|
if (file == NULL) {
|
|
|
|
G_ELI_DEBUG(0, "Cannot find key file name for %s.",
|
|
|
|
name);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
G_ELI_DEBUG(1, "Loaded keyfile %s for %s (type: %s).", file,
|
|
|
|
provider, name);
|
|
|
|
g_eli_crypto_hmac_update(ctx, data, *(size_t *)size);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
g_eli_keyfiles_clear(const char *provider)
|
|
|
|
{
|
|
|
|
u_char *keyfile, *data, *size;
|
|
|
|
char name[64];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; ; i++) {
|
|
|
|
snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i);
|
|
|
|
keyfile = preload_search_by_type(name);
|
|
|
|
if (keyfile == NULL)
|
|
|
|
return;
|
|
|
|
data = preload_search_info(keyfile, MODINFO_ADDR);
|
|
|
|
size = preload_search_info(keyfile, MODINFO_SIZE);
|
|
|
|
if (data == NULL || size == NULL)
|
|
|
|
continue;
|
|
|
|
data = *(void **)data;
|
|
|
|
bzero(data, *(size_t *)size);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-07-27 21:43:37 +00:00
|
|
|
/*
|
|
|
|
* Tasting is only made on boot.
|
|
|
|
* We detect providers which should be attached before root is mounted.
|
|
|
|
*/
|
|
|
|
static struct g_geom *
|
|
|
|
g_eli_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
|
|
|
|
{
|
|
|
|
struct g_eli_metadata md;
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct hmac_ctx ctx;
|
|
|
|
char passphrase[256];
|
|
|
|
u_char key[G_ELI_USERKEYLEN], mkey[G_ELI_DATAIVKEYLEN];
|
2006-02-11 13:08:24 +00:00
|
|
|
u_int i, nkey, nkeyfiles, tries;
|
2005-07-27 21:43:37 +00:00
|
|
|
int error;
|
|
|
|
|
|
|
|
g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
|
|
|
|
g_topology_assert();
|
|
|
|
|
2006-02-11 12:45:01 +00:00
|
|
|
if (rootvnode != NULL || g_eli_tries == 0)
|
2005-07-27 21:43:37 +00:00
|
|
|
return (NULL);
|
|
|
|
|
|
|
|
G_ELI_DEBUG(3, "Tasting %s.", pp->name);
|
|
|
|
|
|
|
|
error = g_eli_read_metadata(mp, pp, &md);
|
|
|
|
if (error != 0)
|
|
|
|
return (NULL);
|
|
|
|
gp = NULL;
|
|
|
|
|
|
|
|
if (strcmp(md.md_magic, G_ELI_MAGIC) != 0)
|
|
|
|
return (NULL);
|
|
|
|
if (md.md_version > G_ELI_VERSION) {
|
|
|
|
printf("geom_eli.ko module is too old to handle %s.\n",
|
|
|
|
pp->name);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
if (md.md_provsize != pp->mediasize)
|
|
|
|
return (NULL);
|
|
|
|
/* Should we attach it on boot? */
|
|
|
|
if ((md.md_flags & G_ELI_FLAG_BOOT) == 0)
|
|
|
|
return (NULL);
|
|
|
|
if (md.md_keys == 0x00) {
|
|
|
|
G_ELI_DEBUG(0, "No valid keys on %s.", pp->name);
|
|
|
|
return (NULL);
|
|
|
|
}
|
2006-02-11 13:08:24 +00:00
|
|
|
if (md.md_iterations == -1) {
|
|
|
|
/* If there is no passphrase, we try only once. */
|
|
|
|
tries = 1;
|
|
|
|
} else {
|
|
|
|
/* Ask for the passphrase no more than g_eli_tries times. */
|
|
|
|
tries = g_eli_tries;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < tries; i++) {
|
|
|
|
g_eli_crypto_hmac_init(&ctx, NULL, 0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Load all key files.
|
|
|
|
*/
|
|
|
|
nkeyfiles = g_eli_keyfiles_load(&ctx, pp->name);
|
|
|
|
|
|
|
|
if (nkeyfiles == 0 && md.md_iterations == -1) {
|
|
|
|
/*
|
|
|
|
* No key files and no passphrase, something is
|
|
|
|
* definitely wrong here.
|
|
|
|
* geli(8) doesn't allow for such situation, so assume
|
|
|
|
* that there was really no passphrase and in that case
|
|
|
|
* key files are no properly defined in loader.conf.
|
|
|
|
*/
|
|
|
|
G_ELI_DEBUG(0,
|
|
|
|
"Found no key files in loader.conf for %s.",
|
|
|
|
pp->name);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Ask for the passphrase if defined. */
|
|
|
|
if (md.md_iterations >= 0) {
|
|
|
|
printf("Enter passphrase for %s: ", pp->name);
|
|
|
|
gets(passphrase, sizeof(passphrase),
|
|
|
|
g_eli_visible_passphrase);
|
|
|
|
}
|
2005-07-27 21:43:37 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Prepare Derived-Key from the user passphrase.
|
|
|
|
*/
|
|
|
|
if (md.md_iterations == 0) {
|
|
|
|
g_eli_crypto_hmac_update(&ctx, md.md_salt,
|
|
|
|
sizeof(md.md_salt));
|
|
|
|
g_eli_crypto_hmac_update(&ctx, passphrase,
|
|
|
|
strlen(passphrase));
|
2006-02-11 13:08:24 +00:00
|
|
|
} else if (md.md_iterations > 0) {
|
2005-07-27 21:43:37 +00:00
|
|
|
u_char dkey[G_ELI_USERKEYLEN];
|
|
|
|
|
|
|
|
pkcs5v2_genkey(dkey, sizeof(dkey), md.md_salt,
|
|
|
|
sizeof(md.md_salt), passphrase, md.md_iterations);
|
|
|
|
g_eli_crypto_hmac_update(&ctx, dkey, sizeof(dkey));
|
|
|
|
bzero(dkey, sizeof(dkey));
|
|
|
|
}
|
2006-02-11 13:08:24 +00:00
|
|
|
|
2005-07-27 21:43:37 +00:00
|
|
|
g_eli_crypto_hmac_final(&ctx, key, 0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Decrypt Master-Key.
|
|
|
|
*/
|
|
|
|
error = g_eli_mkey_decrypt(&md, key, mkey, &nkey);
|
|
|
|
bzero(key, sizeof(key));
|
|
|
|
if (error == -1) {
|
2006-02-11 13:08:24 +00:00
|
|
|
if (i == tries - 1) {
|
|
|
|
G_ELI_DEBUG(0,
|
|
|
|
"Wrong key for %s. No tries left.",
|
|
|
|
pp->name);
|
|
|
|
g_eli_keyfiles_clear(pp->name);
|
|
|
|
return (NULL);
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
G_ELI_DEBUG(0, "Wrong key for %s. Tries left: %u.",
|
2006-02-11 13:08:24 +00:00
|
|
|
pp->name, tries - i - 1);
|
2005-07-27 21:43:37 +00:00
|
|
|
/* Try again. */
|
|
|
|
continue;
|
|
|
|
} else if (error > 0) {
|
|
|
|
G_ELI_DEBUG(0, "Cannot decrypt Master Key for %s (error=%d).",
|
|
|
|
pp->name, error);
|
2006-02-11 13:08:24 +00:00
|
|
|
g_eli_keyfiles_clear(pp->name);
|
2005-07-27 21:43:37 +00:00
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We have correct key, let's attach provider.
|
|
|
|
*/
|
|
|
|
gp = g_eli_create(NULL, mp, pp, &md, mkey, nkey);
|
|
|
|
bzero(mkey, sizeof(mkey));
|
|
|
|
bzero(&md, sizeof(md));
|
|
|
|
if (gp == NULL) {
|
|
|
|
G_ELI_DEBUG(0, "Cannot create device %s%s.", pp->name,
|
|
|
|
G_ELI_SUFFIX);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
return (gp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
g_eli_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
|
|
|
|
struct g_consumer *cp, struct g_provider *pp)
|
|
|
|
{
|
|
|
|
struct g_eli_softc *sc;
|
|
|
|
|
|
|
|
g_topology_assert();
|
|
|
|
sc = gp->softc;
|
|
|
|
if (sc == NULL)
|
|
|
|
return;
|
|
|
|
if (pp != NULL || cp != NULL)
|
|
|
|
return; /* Nothing here. */
|
2005-07-27 22:31:57 +00:00
|
|
|
sbuf_printf(sb, "%s<Flags>", indent);
|
|
|
|
if (sc->sc_flags == 0)
|
|
|
|
sbuf_printf(sb, "NONE");
|
|
|
|
else {
|
|
|
|
int first = 1;
|
|
|
|
|
|
|
|
#define ADD_FLAG(flag, name) do { \
|
|
|
|
if ((sc->sc_flags & (flag)) != 0) { \
|
|
|
|
if (!first) \
|
|
|
|
sbuf_printf(sb, ", "); \
|
|
|
|
else \
|
|
|
|
first = 0; \
|
|
|
|
sbuf_printf(sb, name); \
|
|
|
|
} \
|
|
|
|
} while (0)
|
|
|
|
ADD_FLAG(G_ELI_FLAG_ONETIME, "ONETIME");
|
|
|
|
ADD_FLAG(G_ELI_FLAG_BOOT, "BOOT");
|
|
|
|
ADD_FLAG(G_ELI_FLAG_WO_DETACH, "W-DETACH");
|
|
|
|
ADD_FLAG(G_ELI_FLAG_RW_DETACH, "RW-DETACH");
|
|
|
|
ADD_FLAG(G_ELI_FLAG_WOPEN, "W-OPEN");
|
|
|
|
ADD_FLAG(G_ELI_FLAG_DESTROY, "DESTROY");
|
|
|
|
#undef ADD_FLAG
|
|
|
|
}
|
|
|
|
sbuf_printf(sb, "</Flags>\n");
|
|
|
|
|
|
|
|
if ((sc->sc_flags & G_ELI_FLAG_ONETIME) == 0) {
|
|
|
|
sbuf_printf(sb, "%s<UsedKey>%u</UsedKey>\n", indent,
|
|
|
|
sc->sc_nkey);
|
|
|
|
}
|
2005-07-27 21:43:37 +00:00
|
|
|
sbuf_printf(sb, "%s<Crypto>", indent);
|
|
|
|
switch (sc->sc_crypto) {
|
|
|
|
case G_ELI_CRYPTO_HW:
|
|
|
|
sbuf_printf(sb, "hardware");
|
|
|
|
break;
|
|
|
|
case G_ELI_CRYPTO_SW:
|
|
|
|
sbuf_printf(sb, "software");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
sbuf_printf(sb, "UNKNOWN");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
sbuf_printf(sb, "</Crypto>\n");
|
2005-07-27 22:31:57 +00:00
|
|
|
sbuf_printf(sb, "%s<KeyLength>%u</KeyLength>\n", indent, sc->sc_keylen);
|
|
|
|
sbuf_printf(sb, "%s<Cipher>%s</Cipher>\n", indent,
|
|
|
|
g_eli_algo2str(sc->sc_algo));
|
2005-07-27 21:43:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
DECLARE_GEOM_CLASS(g_eli_class, g_eli);
|
|
|
|
MODULE_DEPEND(geom_eli, crypto, 1, 1, 1);
|