gbde.c revision 141198
1105513Sphk/*- 2105513Sphk * Copyright (c) 2002 Poul-Henning Kamp 3105513Sphk * Copyright (c) 2002 Networks Associates Technology, Inc. 4105513Sphk * All rights reserved. 5105513Sphk * 6105513Sphk * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7105513Sphk * and NAI Labs, the Security Research Division of Network Associates, Inc. 8105513Sphk * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9105513Sphk * DARPA CHATS research program. 10105513Sphk * 11105513Sphk * Redistribution and use in source and binary forms, with or without 12105513Sphk * modification, are permitted provided that the following conditions 13105513Sphk * are met: 14105513Sphk * 1. Redistributions of source code must retain the above copyright 15105513Sphk * notice, this list of conditions and the following disclaimer. 16105513Sphk * 2. Redistributions in binary form must reproduce the above copyright 17105513Sphk * notice, this list of conditions and the following disclaimer in the 18105513Sphk * documentation and/or other materials provided with the distribution. 19105513Sphk * 20105513Sphk * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21105513Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22105513Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23105513Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24105513Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25105513Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26105513Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27105513Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28105513Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29105513Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30105513Sphk * SUCH DAMAGE. 31105513Sphk * 32105513Sphk * $FreeBSD: head/sbin/gbde/gbde.c 141198 2005-02-03 13:12:17Z pjd $ 33121073Sphk * 34121073Sphk * XXX: Future stuff 35125387Sdes * 36121073Sphk * Replace the template file options (-i & -f) with command-line variables 37121073Sphk * "-v property=foo" 38121073Sphk * 39121073Sphk * Introduce -e, extra entropy source (XOR with /dev/random) 40121073Sphk * 41121073Sphk * Introduce -E, alternate entropy source (instead of /dev/random) 42121073Sphk * 43125387Sdes * Introduce -i take IV from keyboard or 44121073Sphk * 45121073Sphk * Introduce -I take IV from file/cmd 46121073Sphk * 47121073Sphk * Introduce -m/-M store encrypted+encoded masterkey in file 48121073Sphk * 49121073Sphk * Introduce -k/-K get pass-phrase part from file/cmd 50121073Sphk * 51121073Sphk * Introduce -d add more dest-devices to worklist. 52121073Sphk * 53121073Sphk * Add key-option: selfdestruct bit. 54121073Sphk * 55121073Sphk * New/changed verbs: 56121073Sphk * "onetime" attach with onetime nonstored locksector 57121073Sphk * "key"/"unkey" to blast memory copy of key without orphaning 58121073Sphk * "nuke" blow away everything attached, crash/halt/power-off if possible. 59121073Sphk * "blast" destroy all copies of the masterkey 60121073Sphk * "destroy" destroy one copy of the masterkey 61121073Sphk * "backup"/"restore" of masterkey sectors. 62121073Sphk * 63121073Sphk * Make all verbs work on both attached/detached devices. 64121073Sphk * 65105513Sphk */ 66105513Sphk 67105513Sphk#include <sys/types.h> 68105513Sphk#include <sys/queue.h> 69105513Sphk#include <sys/mutex.h> 70105513Sphk#include <md5.h> 71105513Sphk#include <readpassphrase.h> 72105513Sphk#include <string.h> 73105513Sphk#include <stdint.h> 74105513Sphk#include <unistd.h> 75105513Sphk#include <fcntl.h> 76107455Sphk#include <paths.h> 77105513Sphk#include <strings.h> 78105513Sphk#include <stdlib.h> 79105513Sphk#include <err.h> 80105513Sphk#include <stdio.h> 81105513Sphk#include <libutil.h> 82112877Sphk#include <libgeom.h> 83105513Sphk#include <sys/errno.h> 84105513Sphk#include <sys/disk.h> 85106407Sphk#include <sys/stat.h> 86105513Sphk#include <crypto/rijndael/rijndael.h> 87106407Sphk#include <crypto/sha2/sha2.h> 88120877Sphk#include <sys/param.h> 89120877Sphk#include <sys/linker.h> 90105513Sphk 91120877Sphk#define GBDEMOD "geom_bde" 92106407Sphk#define KASSERT(foo, bar) do { if(!(foo)) { warn bar ; exit (1); } } while (0) 93106407Sphk 94105513Sphk#include <geom/geom.h> 95105513Sphk#include <geom/bde/g_bde.h> 96105513Sphk 97105513Sphkextern const char template[]; 98105513Sphk 99106407Sphk 100106407Sphk#if 0 101106407Sphkstatic void 102106407Sphkg_hexdump(void *ptr, int length) 103106407Sphk{ 104106407Sphk int i, j, k; 105106407Sphk unsigned char *cp; 106106407Sphk 107106407Sphk cp = ptr; 108106407Sphk for (i = 0; i < length; i+= 16) { 109106407Sphk printf("%04x ", i); 110106407Sphk for (j = 0; j < 16; j++) { 111106407Sphk k = i + j; 112106407Sphk if (k < length) 113106407Sphk printf(" %02x", cp[k]); 114106407Sphk else 115106407Sphk printf(" "); 116106407Sphk } 117106407Sphk printf(" |"); 118106407Sphk for (j = 0; j < 16; j++) { 119106407Sphk k = i + j; 120106407Sphk if (k >= length) 121106407Sphk printf(" "); 122106407Sphk else if (cp[k] >= ' ' && cp[k] <= '~') 123106407Sphk printf("%c", cp[k]); 124106407Sphk else 125106407Sphk printf("."); 126106407Sphk } 127106407Sphk printf("|\n"); 128106407Sphk } 129106407Sphk} 130106407Sphk#endif 131106407Sphk 132105513Sphkstatic void __dead2 133105513Sphkusage(const char *reason) 134105513Sphk{ 135105513Sphk const char *p; 136105513Sphk 137105513Sphk p = getprogname(); 138105513Sphk fprintf(stderr, "Usage error: %s", reason); 139105513Sphk fprintf(stderr, "Usage:\n"); 140141198Spjd fprintf(stderr, "\t%s attach dest [-l lockfile] [-p pass-phrase]\n", p); 141105541Sphk fprintf(stderr, "\t%s detach dest\n", p); 142141198Spjd fprintf(stderr, "\t%s init /dev/dest [-i] [-f filename] [-L lockfile] [-P pass-phrase]\n", p); 143141198Spjd fprintf(stderr, "\t%s setkey dest [-n key] [-l lockfile] [-p pass-phrase] [-L new-lockfile] [-P new-pass-phrase]\n", p); 144141198Spjd fprintf(stderr, "\t%s destroy dest [-n key] [-l lockfile] [-p pass-phrase] [-L lockfile]\n", p); 145105513Sphk exit (1); 146105513Sphk} 147105513Sphk 148105513Sphkvoid * 149105513Sphkg_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error) 150105513Sphk{ 151105513Sphk void *p; 152105513Sphk int fd, i; 153105513Sphk off_t o2; 154105513Sphk 155105513Sphk p = malloc(length); 156105513Sphk if (p == NULL) 157105513Sphk err(1, "malloc"); 158105513Sphk fd = *(int *)cp; 159105513Sphk o2 = lseek(fd, offset, SEEK_SET); 160105513Sphk if (o2 != offset) 161105513Sphk err(1, "lseek"); 162105513Sphk i = read(fd, p, length); 163105513Sphk if (i != length) 164105513Sphk err(1, "read"); 165105513Sphk if (error != NULL) 166105513Sphk error = 0; 167105513Sphk return (p); 168105513Sphk} 169105513Sphk 170105513Sphkstatic void 171105513Sphkrandom_bits(void *p, u_int len) 172105513Sphk{ 173105513Sphk static int fdr = -1; 174105513Sphk int i; 175105513Sphk 176105513Sphk if (fdr < 0) { 177105513Sphk fdr = open("/dev/urandom", O_RDONLY); 178105513Sphk if (fdr < 0) 179105513Sphk err(1, "/dev/urandom"); 180105513Sphk } 181125387Sdes 182105513Sphk i = read(fdr, p, len); 183105513Sphk if (i != (int)len) 184105513Sphk err(1, "read from /dev/urandom"); 185105513Sphk} 186105513Sphk 187105513Sphk/* XXX: not nice */ 188106407Sphkstatic u_char sha2[SHA512_DIGEST_LENGTH]; 189105513Sphk 190105513Sphkstatic void 191105513Sphkreset_passphrase(struct g_bde_softc *sc) 192105513Sphk{ 193105513Sphk 194106407Sphk memcpy(sc->sha2, sha2, SHA512_DIGEST_LENGTH); 195105513Sphk} 196105513Sphk 197105513Sphkstatic void 198105513Sphksetup_passphrase(struct g_bde_softc *sc, int sure, const char *input) 199105513Sphk{ 200105513Sphk char buf1[BUFSIZ], buf2[BUFSIZ], *p; 201105513Sphk 202105513Sphk if (input != NULL) { 203106407Sphk g_bde_hash_pass(sc, input, strlen(input)); 204106407Sphk memcpy(sha2, sc->sha2, SHA512_DIGEST_LENGTH); 205105513Sphk return; 206105513Sphk } 207105513Sphk for (;;) { 208105513Sphk p = readpassphrase( 209105513Sphk sure ? "Enter new passphrase:" : "Enter passphrase: ", 210105513Sphk buf1, sizeof buf1, 211105513Sphk RPP_ECHO_OFF | RPP_REQUIRE_TTY); 212105513Sphk if (p == NULL) 213105513Sphk err(1, "readpassphrase"); 214105513Sphk 215105513Sphk if (sure) { 216105513Sphk p = readpassphrase("Reenter new passphrase: ", 217105513Sphk buf2, sizeof buf2, 218105513Sphk RPP_ECHO_OFF | RPP_REQUIRE_TTY); 219105513Sphk if (p == NULL) 220105513Sphk err(1, "readpassphrase"); 221105513Sphk 222105513Sphk if (strcmp(buf1, buf2)) { 223105513Sphk printf("They didn't match.\n"); 224105513Sphk continue; 225105513Sphk } 226105513Sphk } 227105513Sphk if (strlen(buf1) < 3) { 228105513Sphk printf("Too short passphrase.\n"); 229105513Sphk continue; 230105513Sphk } 231105513Sphk break; 232105513Sphk } 233106407Sphk g_bde_hash_pass(sc, buf1, strlen(buf1)); 234106407Sphk memcpy(sha2, sc->sha2, SHA512_DIGEST_LENGTH); 235105513Sphk} 236105513Sphk 237105513Sphkstatic void 238106407Sphkencrypt_sector(void *d, int len, int klen, void *key) 239105513Sphk{ 240105513Sphk keyInstance ki; 241105513Sphk cipherInstance ci; 242105513Sphk int error; 243125387Sdes 244105513Sphk error = rijndael_cipherInit(&ci, MODE_CBC, NULL); 245105513Sphk if (error <= 0) 246105513Sphk errx(1, "rijndael_cipherInit=%d", error); 247106407Sphk error = rijndael_makeKey(&ki, DIR_ENCRYPT, klen, key); 248105513Sphk if (error <= 0) 249105513Sphk errx(1, "rijndael_makeKeY=%d", error); 250105513Sphk error = rijndael_blockEncrypt(&ci, &ki, d, len * 8, d); 251105513Sphk if (error <= 0) 252105513Sphk errx(1, "rijndael_blockEncrypt=%d", error); 253105513Sphk} 254105513Sphk 255105513Sphkstatic void 256105513Sphkcmd_attach(const struct g_bde_softc *sc, const char *dest, const char *lfile) 257105513Sphk{ 258112877Sphk int ffd; 259112877Sphk u_char buf[16]; 260112877Sphk struct gctl_req *r; 261112877Sphk const char *errstr; 262105513Sphk 263115624Sphk r = gctl_get_handle(); 264115624Sphk gctl_ro_param(r, "verb", -1, "create geom"); 265112877Sphk gctl_ro_param(r, "class", -1, "BDE"); 266112877Sphk gctl_ro_param(r, "provider", -1, dest); 267112877Sphk gctl_ro_param(r, "pass", SHA512_DIGEST_LENGTH, sc->sha2); 268105513Sphk if (lfile != NULL) { 269105513Sphk ffd = open(lfile, O_RDONLY, 0); 270105513Sphk if (ffd < 0) 271111296Stjr err(1, "%s", lfile); 272112877Sphk read(ffd, buf, 16); 273112877Sphk gctl_ro_param(r, "key", 16, buf); 274105513Sphk close(ffd); 275105513Sphk } 276112877Sphk /* gctl_dump(r, stdout); */ 277112877Sphk errstr = gctl_issue(r); 278112877Sphk if (errstr != NULL) 279125386Sdes errx(1, "Attach to %s failed: %s", dest, errstr); 280105513Sphk 281105513Sphk exit (0); 282105513Sphk} 283105513Sphk 284105513Sphkstatic void 285105541Sphkcmd_detach(const char *dest) 286105513Sphk{ 287112877Sphk struct gctl_req *r; 288112877Sphk const char *errstr; 289112877Sphk char buf[BUFSIZ]; 290105513Sphk 291115624Sphk r = gctl_get_handle(); 292115624Sphk gctl_ro_param(r, "verb", -1, "destroy geom"); 293112877Sphk gctl_ro_param(r, "class", -1, "BDE"); 294112877Sphk sprintf(buf, "%s.bde", dest); 295112877Sphk gctl_ro_param(r, "geom", -1, buf); 296112877Sphk /* gctl_dump(r, stdout); */ 297112877Sphk errstr = gctl_issue(r); 298112877Sphk if (errstr != NULL) 299125386Sdes errx(1, "Detach of %s failed: %s", dest, errstr); 300105513Sphk exit (0); 301105513Sphk} 302105513Sphk 303105513Sphkstatic void 304106407Sphkcmd_open(struct g_bde_softc *sc, int dfd , const char *l_opt, u_int *nkey) 305105513Sphk{ 306105513Sphk int error; 307105513Sphk int ffd; 308105513Sphk u_char keyloc[16]; 309106407Sphk u_int sectorsize; 310106407Sphk off_t mediasize; 311106407Sphk struct stat st; 312105513Sphk 313106407Sphk error = ioctl(dfd, DIOCGSECTORSIZE, §orsize); 314106407Sphk if (error) 315106407Sphk sectorsize = 512; 316106407Sphk error = ioctl(dfd, DIOCGMEDIASIZE, &mediasize); 317106407Sphk if (error) { 318106407Sphk error = fstat(dfd, &st); 319106407Sphk if (error == 0 && S_ISREG(st.st_mode)) 320106407Sphk mediasize = st.st_size; 321106407Sphk else 322106407Sphk error = ENOENT; 323106407Sphk } 324106407Sphk if (error) 325106407Sphk mediasize = (off_t)-1; 326105513Sphk if (l_opt != NULL) { 327105513Sphk ffd = open(l_opt, O_RDONLY, 0); 328105513Sphk if (ffd < 0) 329111296Stjr err(1, "%s", l_opt); 330105513Sphk read(ffd, keyloc, sizeof keyloc); 331105513Sphk close(ffd); 332105513Sphk } else { 333105513Sphk memset(keyloc, 0, sizeof keyloc); 334105513Sphk } 335105513Sphk 336106407Sphk error = g_bde_decrypt_lock(sc, sc->sha2, keyloc, mediasize, 337106407Sphk sectorsize, nkey); 338105513Sphk if (error == ENOENT) 339105513Sphk errx(1, "Lock was destroyed."); 340105513Sphk if (error == ESRCH) 341105513Sphk errx(1, "Lock was nuked."); 342105513Sphk if (error == ENOTDIR) 343105513Sphk errx(1, "Lock not found"); 344105513Sphk if (error != 0) 345105513Sphk errx(1, "Error %d decrypting lock", error); 346105513Sphk if (nkey) 347105513Sphk printf("Opened with key %u\n", *nkey); 348105513Sphk return; 349105513Sphk} 350105513Sphk 351105513Sphkstatic void 352105513Sphkcmd_nuke(struct g_bde_key *gl, int dfd , int key) 353105513Sphk{ 354105513Sphk int i; 355105513Sphk u_char *sbuf; 356105513Sphk off_t offset, offset2; 357105513Sphk 358105513Sphk sbuf = malloc(gl->sectorsize); 359105513Sphk memset(sbuf, 0, gl->sectorsize); 360105513Sphk offset = (gl->lsector[key] & ~(gl->sectorsize - 1)); 361105513Sphk offset2 = lseek(dfd, offset, SEEK_SET); 362105513Sphk if (offset2 != offset) 363105513Sphk err(1, "lseek"); 364105513Sphk i = write(dfd, sbuf, gl->sectorsize); 365125473Spjd free(sbuf); 366105513Sphk if (i != (int)gl->sectorsize) 367105513Sphk err(1, "write"); 368105513Sphk printf("Nuked key %d\n", key); 369105513Sphk} 370105513Sphk 371105513Sphkstatic void 372105513Sphkcmd_write(struct g_bde_key *gl, struct g_bde_softc *sc, int dfd , int key, const char *l_opt) 373105513Sphk{ 374105513Sphk int i, ffd; 375105513Sphk uint64_t off[2]; 376105513Sphk u_char keyloc[16]; 377105513Sphk u_char *sbuf, *q; 378105513Sphk off_t offset, offset2; 379105513Sphk 380105513Sphk sbuf = malloc(gl->sectorsize); 381105513Sphk /* 382105513Sphk * Find the byte-offset in the lock sector where we will put the lock 383105513Sphk * data structure. We can put it any random place as long as the 384105513Sphk * structure fits. 385105513Sphk */ 386105513Sphk for(;;) { 387105513Sphk random_bits(off, sizeof off); 388105513Sphk off[0] &= (gl->sectorsize - 1); 389105513Sphk if (off[0] + G_BDE_LOCKSIZE > gl->sectorsize) 390105513Sphk continue; 391105513Sphk break; 392105513Sphk } 393105513Sphk 394105513Sphk /* Add the sector offset in bytes */ 395105513Sphk off[0] += (gl->lsector[key] & ~(gl->sectorsize - 1)); 396105513Sphk gl->lsector[key] = off[0]; 397105513Sphk 398120876Sphk i = g_bde_keyloc_encrypt(sc->sha2, off[0], off[1], keyloc); 399105513Sphk if (i) 400105513Sphk errx(1, "g_bde_keyloc_encrypt()"); 401105513Sphk if (l_opt != NULL) { 402105513Sphk ffd = open(l_opt, O_WRONLY | O_CREAT | O_TRUNC, 0600); 403105513Sphk if (ffd < 0) 404111296Stjr err(1, "%s", l_opt); 405105513Sphk write(ffd, keyloc, sizeof keyloc); 406105513Sphk close(ffd); 407120876Sphk } else if (gl->flags & GBDE_F_SECT0) { 408105513Sphk offset2 = lseek(dfd, 0, SEEK_SET); 409105513Sphk if (offset2 != 0) 410105513Sphk err(1, "lseek"); 411105513Sphk i = read(dfd, sbuf, gl->sectorsize); 412105513Sphk if (i != (int)gl->sectorsize) 413105513Sphk err(1, "read"); 414105513Sphk memcpy(sbuf + key * 16, keyloc, sizeof keyloc); 415105513Sphk offset2 = lseek(dfd, 0, SEEK_SET); 416105513Sphk if (offset2 != 0) 417105513Sphk err(1, "lseek"); 418105513Sphk i = write(dfd, sbuf, gl->sectorsize); 419105513Sphk if (i != (int)gl->sectorsize) 420105513Sphk err(1, "write"); 421105513Sphk } else { 422105513Sphk errx(1, "No -L option and no space in sector 0 for lockfile"); 423105513Sphk } 424105513Sphk 425105513Sphk /* Allocate a sectorbuffer and fill it with random junk */ 426105513Sphk if (sbuf == NULL) 427105513Sphk err(1, "malloc"); 428105513Sphk random_bits(sbuf, gl->sectorsize); 429105513Sphk 430105513Sphk /* Fill random bits in the spare field */ 431105513Sphk random_bits(gl->spare, sizeof(gl->spare)); 432105513Sphk 433105513Sphk /* Encode the structure where we want it */ 434105513Sphk q = sbuf + (off[0] % gl->sectorsize); 435120876Sphk i = g_bde_encode_lock(sc->sha2, gl, q); 436106407Sphk if (i < 0) 437106407Sphk errx(1, "programming error encoding lock"); 438105513Sphk 439106407Sphk encrypt_sector(q, G_BDE_LOCKSIZE, 256, sc->sha2 + 16); 440105513Sphk offset = gl->lsector[key] & ~(gl->sectorsize - 1); 441105513Sphk offset2 = lseek(dfd, offset, SEEK_SET); 442105513Sphk if (offset2 != offset) 443105513Sphk err(1, "lseek"); 444105513Sphk i = write(dfd, sbuf, gl->sectorsize); 445105513Sphk if (i != (int)gl->sectorsize) 446105513Sphk err(1, "write"); 447125473Spjd free(sbuf); 448108052Sphk#if 0 449135035Sphk printf("Wrote key %d at %jd\n", key, (intmax_t)offset); 450108052Sphk printf("s0 = %jd\n", (intmax_t)gl->sector0); 451108052Sphk printf("sN = %jd\n", (intmax_t)gl->sectorN); 452108052Sphk printf("l[0] = %jd\n", (intmax_t)gl->lsector[0]); 453108052Sphk printf("l[1] = %jd\n", (intmax_t)gl->lsector[1]); 454108052Sphk printf("l[2] = %jd\n", (intmax_t)gl->lsector[2]); 455108052Sphk printf("l[3] = %jd\n", (intmax_t)gl->lsector[3]); 456108052Sphk printf("k = %jd\n", (intmax_t)gl->keyoffset); 457108052Sphk printf("ss = %jd\n", (intmax_t)gl->sectorsize); 458108052Sphk#endif 459105513Sphk} 460105513Sphk 461105513Sphkstatic void 462105513Sphkcmd_destroy(struct g_bde_key *gl, int nkey) 463105513Sphk{ 464105513Sphk int i; 465105513Sphk 466105513Sphk bzero(&gl->sector0, sizeof gl->sector0); 467105513Sphk bzero(&gl->sectorN, sizeof gl->sectorN); 468105513Sphk bzero(&gl->keyoffset, sizeof gl->keyoffset); 469105513Sphk bzero(&gl->flags, sizeof gl->flags); 470106227Sphk bzero(gl->mkey, sizeof gl->mkey); 471105513Sphk for (i = 0; i < G_BDE_MAXKEYS; i++) 472105513Sphk if (i != nkey) 473105513Sphk gl->lsector[i] = ~0; 474105513Sphk} 475105513Sphk 476108052Sphkstatic int 477108052Sphksorthelp(const void *a, const void *b) 478108052Sphk{ 479135035Sphk const uint64_t *oa, *ob; 480108052Sphk 481108052Sphk oa = a; 482108052Sphk ob = b; 483131101Ssobomax if (*oa > *ob) 484131101Ssobomax return 1; 485131101Ssobomax if (*oa < *ob) 486131101Ssobomax return -1; 487131101Ssobomax return 0; 488108052Sphk} 489108052Sphk 490105513Sphkstatic void 491105513Sphkcmd_init(struct g_bde_key *gl, int dfd, const char *f_opt, int i_opt, const char *l_opt) 492105513Sphk{ 493105513Sphk int i; 494105513Sphk u_char *buf; 495105513Sphk unsigned sector_size; 496105513Sphk uint64_t first_sector; 497105513Sphk uint64_t last_sector; 498105513Sphk uint64_t total_sectors; 499105513Sphk off_t off, off2; 500105513Sphk unsigned nkeys; 501105513Sphk const char *p; 502105513Sphk char *q, cbuf[BUFSIZ]; 503105513Sphk unsigned u, u2; 504105513Sphk uint64_t o; 505105513Sphk properties params; 506105513Sphk 507105513Sphk bzero(gl, sizeof *gl); 508105513Sphk if (f_opt != NULL) { 509105513Sphk i = open(f_opt, O_RDONLY); 510105513Sphk if (i < 0) 511111296Stjr err(1, "%s", f_opt); 512105513Sphk params = properties_read(i); 513105513Sphk close (i); 514125477Sdes } else if (i_opt) { 515105513Sphk /* XXX: Polish */ 516125477Sdes asprintf(&q, "%stemp.XXXXXXXXXX", _PATH_TMP); 517125477Sdes if (q == NULL) 518125477Sdes err(1, "asprintf"); 519105513Sphk i = mkstemp(q); 520105513Sphk if (i < 0) 521111296Stjr err(1, "%s", q); 522105513Sphk write(i, template, strlen(template)); 523105513Sphk close (i); 524125477Sdes p = getenv("EDITOR"); 525125477Sdes if (p == NULL) 526125477Sdes p = "vi"; 527125477Sdes if (snprintf(cbuf, sizeof(cbuf), "%s %s\n", p, q) >= 528125477Sdes (ssize_t)sizeof(cbuf)) { 529125477Sdes unlink(q); 530125477Sdes errx(1, "EDITOR is too long"); 531105513Sphk } 532125477Sdes system(cbuf); 533105513Sphk i = open(q, O_RDONLY); 534105513Sphk if (i < 0) 535111296Stjr err(1, "%s", f_opt); 536105513Sphk params = properties_read(i); 537105513Sphk close (i); 538105513Sphk unlink(q); 539125473Spjd free(q); 540125477Sdes } else { 541125477Sdes /* XXX: Hack */ 542125477Sdes i = open(_PATH_DEVNULL, O_RDONLY); 543125477Sdes if (i < 0) 544125477Sdes err(1, "%s", _PATH_DEVNULL); 545125477Sdes params = properties_read(i); 546125477Sdes close (i); 547105513Sphk } 548105513Sphk 549105513Sphk /* <sector_size> */ 550105513Sphk p = property_find(params, "sector_size"); 551105513Sphk i = ioctl(dfd, DIOCGSECTORSIZE, &u); 552105513Sphk if (p != NULL) { 553105513Sphk sector_size = strtoul(p, &q, 0); 554105513Sphk if (!*p || *q) 555105513Sphk errx(1, "sector_size not a proper number"); 556108020Sphk } else if (i == 0) { 557108020Sphk sector_size = u; 558108020Sphk } else { 559108020Sphk errx(1, "Missing sector_size property"); 560105513Sphk } 561105513Sphk if (sector_size & (sector_size - 1)) 562105513Sphk errx(1, "sector_size not a power of 2"); 563105513Sphk if (sector_size < 512) 564105513Sphk errx(1, "sector_size is smaller than 512"); 565105513Sphk buf = malloc(sector_size); 566105513Sphk if (buf == NULL) 567105513Sphk err(1, "Failed to malloc sector buffer"); 568105513Sphk gl->sectorsize = sector_size; 569105513Sphk 570105513Sphk i = ioctl(dfd, DIOCGMEDIASIZE, &off); 571105513Sphk if (i == 0) { 572105513Sphk first_sector = 0; 573105513Sphk total_sectors = off / sector_size; 574105513Sphk last_sector = total_sectors - 1; 575105513Sphk } else { 576105513Sphk first_sector = 0; 577105513Sphk last_sector = 0; 578105513Sphk total_sectors = 0; 579105513Sphk } 580105513Sphk 581105513Sphk /* <first_sector> */ 582105513Sphk p = property_find(params, "first_sector"); 583105513Sphk if (p != NULL) { 584105513Sphk first_sector = strtoul(p, &q, 0); 585105513Sphk if (!*p || *q) 586105513Sphk errx(1, "first_sector not a proper number"); 587105513Sphk } 588105513Sphk 589105513Sphk /* <last_sector> */ 590105513Sphk p = property_find(params, "last_sector"); 591105513Sphk if (p != NULL) { 592105513Sphk last_sector = strtoul(p, &q, 0); 593105513Sphk if (!*p || *q) 594105513Sphk errx(1, "last_sector not a proper number"); 595105513Sphk if (last_sector <= first_sector) 596105513Sphk errx(1, "last_sector not larger than first_sector"); 597105513Sphk total_sectors = last_sector + 1; 598105513Sphk } 599105513Sphk 600105513Sphk /* <total_sectors> */ 601105513Sphk p = property_find(params, "total_sectors"); 602105513Sphk if (p != NULL) { 603105513Sphk total_sectors = strtoul(p, &q, 0); 604105513Sphk if (!*p || *q) 605105513Sphk errx(1, "total_sectors not a proper number"); 606125387Sdes if (last_sector == 0) 607105513Sphk last_sector = first_sector + total_sectors - 1; 608105513Sphk } 609105513Sphk 610105513Sphk if (l_opt == NULL && first_sector != 0) 611105513Sphk errx(1, "No -L new-lockfile argument and first_sector != 0"); 612105513Sphk else if (l_opt == NULL) { 613105513Sphk first_sector++; 614105513Sphk total_sectors--; 615120876Sphk gl->flags |= GBDE_F_SECT0; 616105513Sphk } 617108060Sphk gl->sector0 = first_sector * gl->sectorsize; 618105513Sphk 619105513Sphk if (total_sectors != (last_sector - first_sector) + 1) 620105513Sphk errx(1, "total_sectors disagree with first_sector and last_sector"); 621105513Sphk if (total_sectors == 0) 622105513Sphk errx(1, "missing last_sector or total_sectors"); 623105513Sphk 624105513Sphk gl->sectorN = (last_sector + 1) * gl->sectorsize; 625105513Sphk 626105513Sphk /* Find a random keyoffset */ 627105513Sphk random_bits(&o, sizeof o); 628105513Sphk o %= (gl->sectorN - gl->sector0); 629105513Sphk o &= ~(gl->sectorsize - 1); 630105513Sphk gl->keyoffset = o; 631105513Sphk 632105513Sphk /* <number_of_keys> */ 633105513Sphk p = property_find(params, "number_of_keys"); 634125477Sdes if (p != NULL) { 635125477Sdes nkeys = strtoul(p, &q, 0); 636125477Sdes if (!*p || *q) 637125477Sdes errx(1, "number_of_keys not a proper number"); 638125477Sdes if (nkeys < 1 || nkeys > G_BDE_MAXKEYS) 639125477Sdes errx(1, "number_of_keys out of range"); 640125477Sdes } else { 641125477Sdes nkeys = 4; 642125477Sdes } 643105513Sphk for (u = 0; u < nkeys; u++) { 644105513Sphk for(;;) { 645105513Sphk do { 646105513Sphk random_bits(&o, sizeof o); 647105513Sphk o %= gl->sectorN; 648105513Sphk o &= ~(gl->sectorsize - 1); 649105513Sphk } while(o < gl->sector0); 650105513Sphk for (u2 = 0; u2 < u; u2++) 651105513Sphk if (o == gl->lsector[u2]) 652105513Sphk break; 653105513Sphk if (u2 < u) 654105513Sphk continue; 655105513Sphk break; 656105513Sphk } 657105513Sphk gl->lsector[u] = o; 658125387Sdes } 659105513Sphk for (; u < G_BDE_MAXKEYS; u++) { 660125387Sdes do 661105513Sphk random_bits(&o, sizeof o); 662105513Sphk while (o < gl->sectorN); 663105513Sphk gl->lsector[u] = o; 664105513Sphk } 665108052Sphk qsort(gl->lsector, G_BDE_MAXKEYS, sizeof gl->lsector[0], sorthelp); 666105513Sphk 667105513Sphk /* Flush sector zero if we use it for lockfile data */ 668120876Sphk if (gl->flags & GBDE_F_SECT0) { 669105513Sphk off2 = lseek(dfd, 0, SEEK_SET); 670105513Sphk if (off2 != 0) 671105513Sphk err(1, "lseek(2) to sector 0"); 672105513Sphk random_bits(buf, sector_size); 673105513Sphk i = write(dfd, buf, sector_size); 674105513Sphk if (i != (int)sector_size) 675105513Sphk err(1, "write sector 0"); 676105513Sphk } 677105513Sphk 678105513Sphk /* <random_flush> */ 679105513Sphk p = property_find(params, "random_flush"); 680105513Sphk if (p != NULL) { 681105513Sphk off = first_sector * sector_size; 682105513Sphk off2 = lseek(dfd, off, SEEK_SET); 683105513Sphk if (off2 != off) 684105513Sphk err(1, "lseek(2) to first_sector"); 685105513Sphk off2 = last_sector * sector_size; 686105513Sphk while (off <= off2) { 687105513Sphk random_bits(buf, sector_size); 688105513Sphk i = write(dfd, buf, sector_size); 689105513Sphk if (i != (int)sector_size) 690105513Sphk err(1, "write to $device_name"); 691105513Sphk off += sector_size; 692105513Sphk } 693105513Sphk } 694105513Sphk 695106227Sphk random_bits(gl->mkey, sizeof gl->mkey); 696106227Sphk random_bits(gl->salt, sizeof gl->salt); 697125387Sdes 698105513Sphk return; 699105513Sphk} 700105513Sphk 701105513Sphkstatic enum action { 702105513Sphk ACT_HUH, 703105541Sphk ACT_ATTACH, ACT_DETACH, 704105513Sphk ACT_INIT, ACT_SETKEY, ACT_DESTROY, ACT_NUKE 705105513Sphk} action; 706105513Sphk 707105513Sphkint 708105513Sphkmain(int argc, char **argv) 709105513Sphk{ 710105513Sphk const char *opts; 711105513Sphk const char *l_opt, *L_opt; 712105513Sphk const char *p_opt, *P_opt; 713105513Sphk const char *f_opt; 714107455Sphk char *dest; 715107455Sphk int i_opt, n_opt, ch, dfd, doopen; 716107455Sphk u_int nkey; 717105513Sphk int i; 718107455Sphk char *q, buf[BUFSIZ]; 719105513Sphk struct g_bde_key *gl; 720105513Sphk struct g_bde_softc sc; 721105513Sphk 722105513Sphk if (argc < 3) 723105513Sphk usage("Too few arguments\n"); 724105513Sphk 725120969Sphk if ((i = modfind("g_bde")) < 0) { 726125387Sdes /* need to load the gbde module */ 727125387Sdes if (kldload(GBDEMOD) < 0 || modfind("g_bde") < 0) { 728131101Ssobomax usage(GBDEMOD ": Kernel module not available\n"); 729125387Sdes } 730120877Sphk } 731105513Sphk doopen = 0; 732105513Sphk if (!strcmp(argv[1], "attach")) { 733105513Sphk action = ACT_ATTACH; 734105513Sphk opts = "l:p:"; 735105541Sphk } else if (!strcmp(argv[1], "detach")) { 736105541Sphk action = ACT_DETACH; 737105513Sphk opts = ""; 738105513Sphk } else if (!strcmp(argv[1], "init")) { 739105513Sphk action = ACT_INIT; 740105513Sphk doopen = 1; 741105513Sphk opts = "f:iL:P:"; 742105513Sphk } else if (!strcmp(argv[1], "setkey")) { 743105513Sphk action = ACT_SETKEY; 744105513Sphk doopen = 1; 745105513Sphk opts = "n:l:L:p:P:"; 746105513Sphk } else if (!strcmp(argv[1], "destroy")) { 747105513Sphk action = ACT_DESTROY; 748105513Sphk doopen = 1; 749105513Sphk opts = "l:p:"; 750105513Sphk } else if (!strcmp(argv[1], "nuke")) { 751105513Sphk action = ACT_NUKE; 752105513Sphk doopen = 1; 753105513Sphk opts = "l:p:n:"; 754105513Sphk } else { 755105513Sphk usage("Unknown sub command\n"); 756105513Sphk } 757105513Sphk argc--; 758105513Sphk argv++; 759105513Sphk 760107455Sphk dest = strdup(argv[1]); 761105513Sphk argc--; 762105513Sphk argv++; 763105513Sphk 764105513Sphk p_opt = NULL; 765105513Sphk P_opt = NULL; 766105513Sphk l_opt = NULL; 767105513Sphk L_opt = NULL; 768105513Sphk f_opt = NULL; 769105513Sphk n_opt = 0; 770105513Sphk i_opt = 0; 771105513Sphk 772105513Sphk while((ch = getopt(argc, argv, opts)) != -1) 773105513Sphk switch (ch) { 774105513Sphk case 'f': 775105513Sphk f_opt = optarg; 776105513Sphk break; 777105513Sphk case 'i': 778105513Sphk i_opt = !i_opt; 779105513Sphk case 'l': 780105513Sphk l_opt = optarg; 781105513Sphk break; 782105513Sphk case 'L': 783105513Sphk L_opt = optarg; 784105513Sphk break; 785105513Sphk case 'p': 786105513Sphk p_opt = optarg; 787105513Sphk break; 788105513Sphk case 'P': 789105513Sphk P_opt = optarg; 790105513Sphk break; 791105513Sphk case 'n': 792105513Sphk n_opt = strtoul(optarg, &q, 0); 793105513Sphk if (!*optarg || *q) 794105513Sphk usage("-n argument not numeric\n"); 795105513Sphk if (n_opt < -1 || n_opt > G_BDE_MAXKEYS) 796107982Sphk usage("-n argument out of range\n"); break; 797105513Sphk default: 798105513Sphk usage("Invalid option\n"); 799105513Sphk } 800105513Sphk 801105513Sphk if (doopen) { 802141198Spjd dfd = open(dest, O_RDWR); 803141198Spjd if (dfd < 0 && dest[0] != '/') { 804111298Stjr if (snprintf(buf, sizeof(buf), "%s%s", 805111298Stjr _PATH_DEV, dest) >= (ssize_t)sizeof(buf)) 806111298Stjr errno = ENAMETOOLONG; 807111298Stjr else 808141198Spjd dfd = open(buf, O_RDWR); 809107455Sphk } 810105513Sphk if (dfd < 0) 811111296Stjr err(1, "%s", dest); 812107455Sphk } else { 813107455Sphk if (!memcmp(dest, _PATH_DEV, strlen(_PATH_DEV))) 814107455Sphk strcpy(dest, dest + strlen(_PATH_DEV)); 815105513Sphk } 816105513Sphk 817105513Sphk memset(&sc, 0, sizeof sc); 818107982Sphk sc.consumer = (void *)&dfd; 819105513Sphk gl = &sc.key; 820105513Sphk switch(action) { 821105513Sphk case ACT_ATTACH: 822105513Sphk setup_passphrase(&sc, 0, p_opt); 823105513Sphk cmd_attach(&sc, dest, l_opt); 824105513Sphk break; 825105541Sphk case ACT_DETACH: 826105541Sphk cmd_detach(dest); 827105513Sphk break; 828105513Sphk case ACT_INIT: 829105513Sphk cmd_init(gl, dfd, f_opt, i_opt, L_opt); 830105513Sphk setup_passphrase(&sc, 1, P_opt); 831105513Sphk cmd_write(gl, &sc, dfd, 0, L_opt); 832105513Sphk break; 833105513Sphk case ACT_SETKEY: 834105513Sphk setup_passphrase(&sc, 0, p_opt); 835105513Sphk cmd_open(&sc, dfd, l_opt, &nkey); 836105513Sphk if (n_opt == 0) 837105513Sphk n_opt = nkey + 1; 838105513Sphk setup_passphrase(&sc, 1, P_opt); 839105513Sphk cmd_write(gl, &sc, dfd, n_opt - 1, L_opt); 840105513Sphk break; 841105513Sphk case ACT_DESTROY: 842105513Sphk setup_passphrase(&sc, 0, p_opt); 843105513Sphk cmd_open(&sc, dfd, l_opt, &nkey); 844105513Sphk cmd_destroy(gl, nkey); 845105513Sphk reset_passphrase(&sc); 846105513Sphk cmd_write(gl, &sc, dfd, nkey, l_opt); 847105513Sphk break; 848105513Sphk case ACT_NUKE: 849105513Sphk setup_passphrase(&sc, 0, p_opt); 850105513Sphk cmd_open(&sc, dfd, l_opt, &nkey); 851105513Sphk if (n_opt == 0) 852105513Sphk n_opt = nkey + 1; 853105513Sphk if (n_opt == -1) { 854105513Sphk for(i = 0; i < G_BDE_MAXKEYS; i++) 855105513Sphk cmd_nuke(gl, dfd, i); 856105513Sphk } else { 857105513Sphk cmd_nuke(gl, dfd, n_opt - 1); 858105513Sphk } 859105513Sphk break; 860105513Sphk default: 861105513Sphk usage("Internal error\n"); 862105513Sphk } 863105513Sphk 864105513Sphk return(0); 865105513Sphk} 866