723 lines
18 KiB
C
723 lines
18 KiB
C
/*-
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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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*
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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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#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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#include <sys/uio.h>
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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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MALLOC_DECLARE(M_ELI);
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static void
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g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
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{
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struct g_eli_metadata md;
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struct g_provider *pp;
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const char *name;
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u_char *key, mkey[G_ELI_DATAIVKEYLEN];
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int *nargs, *detach, *readonly;
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int keysize, error;
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u_int nkey;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs != 1) {
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gctl_error(req, "Invalid number of arguments.");
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return;
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}
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detach = gctl_get_paraml(req, "detach", sizeof(*detach));
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if (detach == NULL) {
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gctl_error(req, "No '%s' argument.", "detach");
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return;
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}
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readonly = gctl_get_paraml(req, "readonly", sizeof(*readonly));
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if (readonly == NULL) {
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gctl_error(req, "No '%s' argument.", "readonly");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
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name += strlen("/dev/");
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pp = g_provider_by_name(name);
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if (pp == NULL) {
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gctl_error(req, "Provider %s is invalid.", name);
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return;
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}
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error = g_eli_read_metadata(mp, pp, &md);
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if (error != 0) {
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gctl_error(req, "Cannot read metadata from %s (error=%d).",
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name, error);
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return;
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}
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if (md.md_keys == 0x00) {
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bzero(&md, sizeof(md));
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gctl_error(req, "No valid keys on %s.", pp->name);
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return;
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}
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key = gctl_get_param(req, "key", &keysize);
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if (key == NULL || keysize != G_ELI_USERKEYLEN) {
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bzero(&md, sizeof(md));
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gctl_error(req, "No '%s' argument.", "key");
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return;
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}
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error = g_eli_mkey_decrypt(&md, key, mkey, &nkey);
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bzero(key, keysize);
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if (error == -1) {
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bzero(&md, sizeof(md));
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gctl_error(req, "Wrong key for %s.", pp->name);
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return;
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} else if (error > 0) {
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bzero(&md, sizeof(md));
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gctl_error(req, "Cannot decrypt Master Key for %s (error=%d).",
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pp->name, error);
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return;
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}
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G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name);
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if (*detach && *readonly) {
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bzero(&md, sizeof(md));
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gctl_error(req, "Options -d and -r are mutually exclusive.",
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pp->name, error);
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return;
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}
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if (*detach)
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md.md_flags |= G_ELI_FLAG_WO_DETACH;
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if (*readonly)
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md.md_flags |= G_ELI_FLAG_RO;
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g_eli_create(req, mp, pp, &md, mkey, nkey);
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bzero(mkey, sizeof(mkey));
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bzero(&md, sizeof(md));
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}
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static struct g_eli_softc *
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g_eli_find_device(struct g_class *mp, const char *prov)
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{
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struct g_eli_softc *sc;
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struct g_geom *gp;
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struct g_provider *pp;
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struct g_consumer *cp;
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if (strncmp(prov, "/dev/", strlen("/dev/")) == 0)
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prov += strlen("/dev/");
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LIST_FOREACH(gp, &mp->geom, geom) {
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sc = gp->softc;
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if (sc == NULL)
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continue;
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pp = LIST_FIRST(&gp->provider);
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if (pp != NULL && strcmp(pp->name, prov) == 0)
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return (sc);
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cp = LIST_FIRST(&gp->consumer);
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if (cp != NULL && cp->provider != NULL &&
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strcmp(cp->provider->name, prov) == 0) {
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return (sc);
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}
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}
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return (NULL);
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}
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static void
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g_eli_ctl_detach(struct gctl_req *req, struct g_class *mp)
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{
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struct g_eli_softc *sc;
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int *force, *last, *nargs, error;
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const char *prov;
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char param[16];
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int i;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs <= 0) {
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gctl_error(req, "Missing device(s).");
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return;
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}
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force = gctl_get_paraml(req, "force", sizeof(*force));
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if (force == NULL) {
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gctl_error(req, "No '%s' argument.", "force");
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return;
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}
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last = gctl_get_paraml(req, "last", sizeof(*last));
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if (last == NULL) {
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gctl_error(req, "No '%s' argument.", "last");
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return;
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}
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for (i = 0; i < *nargs; i++) {
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snprintf(param, sizeof(param), "arg%d", i);
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prov = gctl_get_asciiparam(req, param);
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if (prov == NULL) {
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gctl_error(req, "No 'arg%d' argument.", i);
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return;
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}
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sc = g_eli_find_device(mp, prov);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", prov);
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return;
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}
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if (*last) {
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sc->sc_flags |= G_ELI_FLAG_RW_DETACH;
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sc->sc_geom->access = g_eli_access;
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} else {
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error = g_eli_destroy(sc, *force);
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if (error != 0) {
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gctl_error(req,
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"Cannot destroy device %s (error=%d).",
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sc->sc_name, error);
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return;
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}
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}
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}
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}
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static void
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g_eli_ctl_onetime(struct gctl_req *req, struct g_class *mp)
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{
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struct g_eli_metadata md;
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struct g_provider *pp;
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const char *name;
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intmax_t *keylen, *sectorsize;
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u_char mkey[G_ELI_DATAIVKEYLEN];
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int *nargs, *detach;
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g_topology_assert();
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bzero(&md, sizeof(md));
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs != 1) {
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gctl_error(req, "Invalid number of arguments.");
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return;
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}
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detach = gctl_get_paraml(req, "detach", sizeof(*detach));
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if (detach == NULL) {
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gctl_error(req, "No '%s' argument.", "detach");
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return;
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}
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strlcpy(md.md_magic, G_ELI_MAGIC, sizeof(md.md_magic));
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md.md_version = G_ELI_VERSION;
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md.md_flags |= G_ELI_FLAG_ONETIME;
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if (*detach)
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md.md_flags |= G_ELI_FLAG_WO_DETACH;
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md.md_ealgo = CRYPTO_ALGORITHM_MIN - 1;
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name = gctl_get_asciiparam(req, "aalgo");
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if (name == NULL) {
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gctl_error(req, "No '%s' argument.", "aalgo");
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return;
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}
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if (strcmp(name, "none") != 0) {
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md.md_aalgo = g_eli_str2aalgo(name);
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if (md.md_aalgo >= CRYPTO_ALGORITHM_MIN &&
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md.md_aalgo <= CRYPTO_ALGORITHM_MAX) {
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md.md_flags |= G_ELI_FLAG_AUTH;
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} else {
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/*
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* For backward compatibility, check if the -a option
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* was used to provide encryption algorithm.
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*/
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md.md_ealgo = g_eli_str2ealgo(name);
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if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
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md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
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gctl_error(req,
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"Invalid authentication algorithm.");
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return;
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} else {
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gctl_error(req, "warning: The -e option, not "
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"the -a option is now used to specify "
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"encryption algorithm to use.");
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}
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}
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}
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if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
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md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
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name = gctl_get_asciiparam(req, "ealgo");
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if (name == NULL) {
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gctl_error(req, "No '%s' argument.", "ealgo");
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return;
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}
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md.md_ealgo = g_eli_str2ealgo(name);
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if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
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md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
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gctl_error(req, "Invalid encryption algorithm.");
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return;
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}
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}
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keylen = gctl_get_paraml(req, "keylen", sizeof(*keylen));
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if (keylen == NULL) {
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gctl_error(req, "No '%s' argument.", "keylen");
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return;
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}
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md.md_keylen = g_eli_keylen(md.md_ealgo, *keylen);
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if (md.md_keylen == 0) {
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gctl_error(req, "Invalid '%s' argument.", "keylen");
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return;
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}
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/* Not important here. */
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md.md_provsize = 0;
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/* Not important here. */
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bzero(md.md_salt, sizeof(md.md_salt));
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md.md_keys = 0x01;
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arc4rand(mkey, sizeof(mkey), 0);
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/* Not important here. */
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bzero(md.md_hash, sizeof(md.md_hash));
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
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name += strlen("/dev/");
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pp = g_provider_by_name(name);
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if (pp == NULL) {
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gctl_error(req, "Provider %s is invalid.", name);
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return;
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}
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sectorsize = gctl_get_paraml(req, "sectorsize", sizeof(*sectorsize));
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if (sectorsize == NULL) {
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gctl_error(req, "No '%s' argument.", "sectorsize");
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return;
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}
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if (*sectorsize == 0)
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md.md_sectorsize = pp->sectorsize;
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else {
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if (*sectorsize < 0 || (*sectorsize % pp->sectorsize) != 0) {
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gctl_error(req, "Invalid sector size.");
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return;
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}
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md.md_sectorsize = *sectorsize;
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}
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g_eli_create(req, mp, pp, &md, mkey, -1);
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bzero(mkey, sizeof(mkey));
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bzero(&md, sizeof(md));
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}
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static void
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g_eli_ctl_setkey(struct gctl_req *req, struct g_class *mp)
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{
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struct g_eli_softc *sc;
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struct g_eli_metadata md;
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struct g_provider *pp;
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struct g_consumer *cp;
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const char *name;
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u_char *key, *mkeydst, *sector;
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intmax_t *valp;
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int keysize, nkey, error;
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g_topology_assert();
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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sc = g_eli_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "Provider %s is invalid.", name);
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return;
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}
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if (sc->sc_flags & G_ELI_FLAG_RO) {
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gctl_error(req, "Cannot change keys for read-only provider.");
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return;
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}
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cp = LIST_FIRST(&sc->sc_geom->consumer);
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pp = cp->provider;
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error = g_eli_read_metadata(mp, pp, &md);
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if (error != 0) {
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gctl_error(req, "Cannot read metadata from %s (error=%d).",
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name, error);
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return;
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}
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valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
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if (valp == NULL) {
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gctl_error(req, "No '%s' argument.", "keyno");
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return;
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}
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if (*valp != -1)
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nkey = *valp;
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else
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nkey = sc->sc_nkey;
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if (nkey < 0 || nkey >= G_ELI_MAXMKEYS) {
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gctl_error(req, "Invalid '%s' argument.", "keyno");
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return;
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}
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valp = gctl_get_paraml(req, "iterations", sizeof(*valp));
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if (valp == NULL) {
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gctl_error(req, "No '%s' argument.", "iterations");
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return;
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}
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/* Check if iterations number should and can be changed. */
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if (*valp != -1) {
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if (bitcount32(md.md_keys) != 1) {
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gctl_error(req, "To be able to use '-i' option, only "
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"one key can be defined.");
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return;
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}
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if (md.md_keys != (1 << nkey)) {
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gctl_error(req, "Only already defined key can be "
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"changed when '-i' option is used.");
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return;
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}
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md.md_iterations = *valp;
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}
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key = gctl_get_param(req, "key", &keysize);
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if (key == NULL || keysize != G_ELI_USERKEYLEN) {
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bzero(&md, sizeof(md));
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gctl_error(req, "No '%s' argument.", "key");
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return;
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}
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mkeydst = md.md_mkeys + nkey * G_ELI_MKEYLEN;
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md.md_keys |= (1 << nkey);
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bcopy(sc->sc_mkey, mkeydst, sizeof(sc->sc_mkey));
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/* Encrypt Master Key with the new key. */
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error = g_eli_mkey_encrypt(md.md_ealgo, key, md.md_keylen, mkeydst);
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bzero(key, sizeof(key));
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if (error != 0) {
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bzero(&md, sizeof(md));
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gctl_error(req, "Cannot encrypt Master Key (error=%d).", error);
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return;
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}
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sector = malloc(pp->sectorsize, M_ELI, M_WAITOK | M_ZERO);
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/* Store metadata with fresh key. */
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eli_metadata_encode(&md, sector);
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bzero(&md, sizeof(md));
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error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
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pp->sectorsize);
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bzero(sector, sizeof(sector));
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free(sector, M_ELI);
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if (error != 0) {
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gctl_error(req, "Cannot store metadata on %s (error=%d).",
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pp->name, error);
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return;
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}
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G_ELI_DEBUG(1, "Key %u changed on %s.", nkey, pp->name);
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}
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|
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static void
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g_eli_ctl_delkey(struct gctl_req *req, struct g_class *mp)
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{
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struct g_eli_softc *sc;
|
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struct g_eli_metadata md;
|
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struct g_provider *pp;
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struct g_consumer *cp;
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const char *name;
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u_char *mkeydst, *sector;
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intmax_t *valp;
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|
size_t keysize;
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int error, nkey, *all, *force;
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u_int i;
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|
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g_topology_assert();
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|
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nkey = 0; /* fixes causeless gcc warning */
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|
|
name = gctl_get_asciiparam(req, "arg0");
|
|
if (name == NULL) {
|
|
gctl_error(req, "No 'arg%u' argument.", 0);
|
|
return;
|
|
}
|
|
sc = g_eli_find_device(mp, name);
|
|
if (sc == NULL) {
|
|
gctl_error(req, "Provider %s is invalid.", name);
|
|
return;
|
|
}
|
|
if (sc->sc_flags & G_ELI_FLAG_RO) {
|
|
gctl_error(req, "Cannot delete keys for read-only provider.");
|
|
return;
|
|
}
|
|
cp = LIST_FIRST(&sc->sc_geom->consumer);
|
|
pp = cp->provider;
|
|
|
|
error = g_eli_read_metadata(mp, pp, &md);
|
|
if (error != 0) {
|
|
gctl_error(req, "Cannot read metadata from %s (error=%d).",
|
|
name, error);
|
|
return;
|
|
}
|
|
|
|
all = gctl_get_paraml(req, "all", sizeof(*all));
|
|
if (all == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "all");
|
|
return;
|
|
}
|
|
|
|
if (*all) {
|
|
mkeydst = md.md_mkeys;
|
|
keysize = sizeof(md.md_mkeys);
|
|
} else {
|
|
force = gctl_get_paraml(req, "force", sizeof(*force));
|
|
if (force == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "force");
|
|
return;
|
|
}
|
|
|
|
valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
|
|
if (valp == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "keyno");
|
|
return;
|
|
}
|
|
if (*valp != -1)
|
|
nkey = *valp;
|
|
else
|
|
nkey = sc->sc_nkey;
|
|
if (nkey < 0 || nkey >= G_ELI_MAXMKEYS) {
|
|
gctl_error(req, "Invalid '%s' argument.", "keyno");
|
|
return;
|
|
}
|
|
if (!(md.md_keys & (1 << nkey)) && !*force) {
|
|
gctl_error(req, "Master Key %u is not set.", nkey);
|
|
return;
|
|
}
|
|
md.md_keys &= ~(1 << nkey);
|
|
if (md.md_keys == 0 && !*force) {
|
|
gctl_error(req, "This is the last Master Key. Use '-f' "
|
|
"flag if you really want to remove it.");
|
|
return;
|
|
}
|
|
mkeydst = md.md_mkeys + nkey * G_ELI_MKEYLEN;
|
|
keysize = G_ELI_MKEYLEN;
|
|
}
|
|
|
|
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK | M_ZERO);
|
|
for (i = 0; i <= g_eli_overwrites; i++) {
|
|
if (i == g_eli_overwrites)
|
|
bzero(mkeydst, keysize);
|
|
else
|
|
arc4rand(mkeydst, keysize, 0);
|
|
/* Store metadata with destroyed key. */
|
|
eli_metadata_encode(&md, sector);
|
|
error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
|
|
pp->sectorsize);
|
|
if (error != 0) {
|
|
G_ELI_DEBUG(0, "Cannot store metadata on %s "
|
|
"(error=%d).", pp->name, error);
|
|
}
|
|
}
|
|
bzero(&md, sizeof(md));
|
|
bzero(sector, sizeof(sector));
|
|
free(sector, M_ELI);
|
|
if (*all)
|
|
G_ELI_DEBUG(1, "All keys removed from %s.", pp->name);
|
|
else
|
|
G_ELI_DEBUG(1, "Key %d removed from %s.", nkey, pp->name);
|
|
}
|
|
|
|
static int
|
|
g_eli_kill_one(struct g_eli_softc *sc)
|
|
{
|
|
struct g_provider *pp;
|
|
struct g_consumer *cp;
|
|
int error = 0;
|
|
|
|
g_topology_assert();
|
|
|
|
if (sc == NULL)
|
|
return (ENOENT);
|
|
|
|
pp = LIST_FIRST(&sc->sc_geom->provider);
|
|
g_error_provider(pp, ENXIO);
|
|
|
|
cp = LIST_FIRST(&sc->sc_geom->consumer);
|
|
pp = cp->provider;
|
|
|
|
if (sc->sc_flags & G_ELI_FLAG_RO) {
|
|
G_ELI_DEBUG(0, "WARNING: Metadata won't be erased on read-only "
|
|
"provider: %s.", pp->name);
|
|
} else {
|
|
u_char *sector;
|
|
u_int i;
|
|
int err;
|
|
|
|
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK);
|
|
for (i = 0; i <= g_eli_overwrites; i++) {
|
|
if (i == g_eli_overwrites)
|
|
bzero(sector, pp->sectorsize);
|
|
else
|
|
arc4rand(sector, pp->sectorsize, 0);
|
|
err = g_write_data(cp, pp->mediasize - pp->sectorsize,
|
|
sector, pp->sectorsize);
|
|
if (err != 0) {
|
|
G_ELI_DEBUG(0, "Cannot erase metadata on %s "
|
|
"(error=%d).", pp->name, err);
|
|
if (error == 0)
|
|
error = err;
|
|
}
|
|
}
|
|
free(sector, M_ELI);
|
|
}
|
|
if (error == 0)
|
|
G_ELI_DEBUG(0, "%s has been killed.", pp->name);
|
|
g_eli_destroy(sc, 1);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
g_eli_ctl_kill(struct gctl_req *req, struct g_class *mp)
|
|
{
|
|
int *all, *nargs;
|
|
int error;
|
|
|
|
g_topology_assert();
|
|
|
|
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
|
|
if (nargs == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "nargs");
|
|
return;
|
|
}
|
|
all = gctl_get_paraml(req, "all", sizeof(*all));
|
|
if (all == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "all");
|
|
return;
|
|
}
|
|
if (!*all && *nargs == 0) {
|
|
gctl_error(req, "Too few arguments.");
|
|
return;
|
|
}
|
|
|
|
if (*all) {
|
|
struct g_geom *gp, *gp2;
|
|
|
|
LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
|
|
error = g_eli_kill_one(gp->softc);
|
|
if (error != 0)
|
|
gctl_error(req, "Not fully done.");
|
|
}
|
|
} else {
|
|
struct g_eli_softc *sc;
|
|
const char *prov;
|
|
char param[16];
|
|
int i;
|
|
|
|
for (i = 0; i < *nargs; i++) {
|
|
snprintf(param, sizeof(param), "arg%d", i);
|
|
prov = gctl_get_asciiparam(req, param);
|
|
if (prov == NULL) {
|
|
G_ELI_DEBUG(0, "No 'arg%d' argument.", i);
|
|
continue;
|
|
}
|
|
|
|
sc = g_eli_find_device(mp, prov);
|
|
if (sc == NULL) {
|
|
G_ELI_DEBUG(0, "No such provider: %s.", prov);
|
|
continue;
|
|
}
|
|
error = g_eli_kill_one(sc);
|
|
if (error != 0)
|
|
gctl_error(req, "Not fully done.");
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb)
|
|
{
|
|
uint32_t *version;
|
|
|
|
g_topology_assert();
|
|
|
|
version = gctl_get_paraml(req, "version", sizeof(*version));
|
|
if (version == NULL) {
|
|
gctl_error(req, "No '%s' argument.", "version");
|
|
return;
|
|
}
|
|
if (*version != G_ELI_VERSION) {
|
|
gctl_error(req, "Userland and kernel parts are out of sync.");
|
|
return;
|
|
}
|
|
|
|
if (strcmp(verb, "attach") == 0)
|
|
g_eli_ctl_attach(req, mp);
|
|
else if (strcmp(verb, "detach") == 0 || strcmp(verb, "stop") == 0)
|
|
g_eli_ctl_detach(req, mp);
|
|
else if (strcmp(verb, "onetime") == 0)
|
|
g_eli_ctl_onetime(req, mp);
|
|
else if (strcmp(verb, "setkey") == 0)
|
|
g_eli_ctl_setkey(req, mp);
|
|
else if (strcmp(verb, "delkey") == 0)
|
|
g_eli_ctl_delkey(req, mp);
|
|
else if (strcmp(verb, "kill") == 0)
|
|
g_eli_ctl_kill(req, mp);
|
|
else
|
|
gctl_error(req, "Unknown verb.");
|
|
}
|