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Merge and close elliptic curve branch.
[u/mdw/catacomb] / keyutil.c
1 /* -*-c-*-
2 *
3 * $Id: keyutil.c,v 1.16 2003/10/15 09:31:45 mdw Exp $
4 *
5 * Simple key manager program
6 *
7 * (c) 1999 Straylight/Edgeware
8 */
9
10 /*----- Licensing notice --------------------------------------------------*
11 *
12 * This file is part of Catacomb.
13 *
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
18 *
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
23 *
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
27 * MA 02111-1307, USA.
28 */
29
30 /*----- Revision history --------------------------------------------------*
31 *
32 * $Log: keyutil.c,v $
33 * Revision 1.16 2003/10/15 09:31:45 mdw
34 * Fix help message.
35 *
36 * Revision 1.15 2003/05/15 23:23:24 mdw
37 * Fix behaviour with bogus trailing attributes.
38 *
39 * Revision 1.14 2001/02/23 09:03:27 mdw
40 * Simplify usage message by removing nonexistant options.
41 *
42 * Revision 1.13 2001/02/21 20:04:27 mdw
43 * Provide help on individual commands (some need it desparately). Allow
44 * atomic retagging of keys.
45 *
46 * Revision 1.12 2001/02/03 11:58:22 mdw
47 * Store the correct seed information and count for DSA keys now that it's
48 * available.
49 *
50 * Revision 1.11 2000/12/06 20:33:27 mdw
51 * Make flags be macros rather than enumerations, to ensure that they're
52 * unsigned.
53 *
54 * Revision 1.10 2000/10/08 12:02:21 mdw
55 * Use @MP_EQ@ instead of @MP_CMP@.
56 *
57 * Revision 1.9 2000/08/15 21:40:49 mdw
58 * Minor formatting change in listing attributes.
59 *
60 * Revision 1.8 2000/07/29 09:59:13 mdw
61 * Support Lim-Lee primes in Diffie-Hellman parameter generation.
62 *
63 * Revision 1.7 2000/07/01 11:18:51 mdw
64 * Use new interfaces for key manipulation.
65 *
66 * Revision 1.6 2000/06/17 11:28:22 mdw
67 * Use secure memory interface from MP library. `rand_getgood' is
68 * deprecated.
69 *
70 * Revision 1.5 2000/02/12 18:21:03 mdw
71 * Overhaul of key management (again).
72 *
73 * Revision 1.4 1999/12/22 15:48:10 mdw
74 * Track new key-management changes. Support new key generation
75 * algorithms.
76 *
77 * Revision 1.3 1999/11/02 15:23:24 mdw
78 * Fix newlines in keyring list.
79 *
80 * Revision 1.2 1999/10/15 21:05:28 mdw
81 * In `key list', show timezone for local times, and support `-u' option
82 * for UTC output.
83 *
84 * Revision 1.1 1999/09/03 08:41:12 mdw
85 * Initial import.
86 *
87 */
88
89 /*----- Header files ------------------------------------------------------*/
90
91 #include "config.h"
92
93 #include <errno.h>
94 #include <stdio.h>
95 #include <stdlib.h>
96 #include <string.h>
97 #include <time.h>
98
99 #include <mLib/base64.h>
100 #include <mLib/mdwopt.h>
101 #include <mLib/quis.h>
102 #include <mLib/report.h>
103 #include <mLib/sub.h>
104
105 #include <noise.h>
106 #include <rand.h>
107
108 #include "bbs.h"
109 #include "dh.h"
110 #include "dsa.h"
111 #include "fibrand.h"
112 #include "getdate.h"
113 #include "key.h"
114 #include "mp.h"
115 #include "mpmont.h"
116 #include "mprand.h"
117 #include "mptext.h"
118 #include "pgen.h"
119 #include "rsa.h"
120
121 /*----- Handy global state ------------------------------------------------*/
122
123 static const char *keyfile = "keyring";
124
125 /*----- Useful shared functions -------------------------------------------*/
126
127 /* --- @doopen@ --- *
128 *
129 * Arguments: @key_file *f@ = pointer to key file block
130 * @unsigned how@ = method to open file with
131 *
132 * Returns: ---
133 *
134 * Use: Opens a key file and handles errors by panicking
135 * appropriately.
136 */
137
138 static void doopen(key_file *f, unsigned how)
139 {
140 if (key_open(f, keyfile, how, key_moan, 0))
141 die(1, "couldn't open keyring `%s': %s", keyfile, strerror(errno));
142 }
143
144 /* --- @doclose@ --- *
145 *
146 * Arguments: @key_file *f@ = pointer to key file block
147 *
148 * Returns: ---
149 *
150 * Use: Closes a key file and handles errors by panicking
151 * appropriately.
152 */
153
154 static void doclose(key_file *f)
155 {
156 switch (key_close(f)) {
157 case KWRITE_FAIL:
158 die(EXIT_FAILURE, "couldn't write file `%s': %s",
159 keyfile, strerror(errno));
160 case KWRITE_BROKEN:
161 die(EXIT_FAILURE, "keyring file `%s' broken: %s (repair manually)",
162 keyfile, strerror(errno));
163 }
164 }
165
166 /* --- @setattr@ --- *
167 *
168 * Arguments: @key_file *f@ = pointer to key file block
169 * @key *k@ = pointer to key block
170 * @char *v[]@ = array of assignments (overwritten!)
171 *
172 * Returns: ---
173 *
174 * Use: Applies the attribute assignments to the key.
175 */
176
177 static void setattr(key_file *f, key *k, char *v[])
178 {
179 while (*v) {
180 int err;
181 char *p = *v;
182 size_t eq = strcspn(p, "=");
183 if (!p[eq]) {
184 moan("invalid assignment: `%s' (ignored)", p);
185 v++;
186 continue;
187 }
188 p[eq] = 0;
189 p += eq + 1;
190 if ((err = key_putattr(f, k, *v, *p ? p : 0)) != 0)
191 die(EXIT_FAILURE, "couldn't set attributes: %s", key_strerror(err));
192 v++;
193 }
194 }
195
196 /*----- Key generation ----------------------------------------------------*/
197
198 /* --- Key generation parameters --- */
199
200 typedef struct keyopts {
201 key_file *kf; /* Pointer to key file */
202 key *k; /* Pointer to the actual key */
203 dstr tag; /* Full tag name for the key */
204 unsigned f; /* Flags for the new key */
205 unsigned bits, qbits; /* Bit length for the new key */
206 key *p; /* Parameters key-data */
207 } keyopts;
208
209 #define f_bogus 1u /* Error in parsing */
210 #define f_lock 2u /* Passphrase-lock private key */
211 #define f_quiet 4u /* Don't show a progress indicator */
212 #define f_limlee 8u /* Generate Lim-Lee primes */
213 #define f_subgroup 16u /* Generate a subgroup */
214 #define f_retag 32u /* Remove any existing tag */
215
216 /* --- @dolock@ --- *
217 *
218 * Arguments: @keyopts *k@ = key generation options
219 * @key_data *kd@ = pointer to key data to lock
220 * @const char *t@ = tag suffix or null
221 *
222 * Returns: ---
223 *
224 * Use: Does passphrase locking on new keys.
225 */
226
227 static void dolock(keyopts *k, key_data *kd, const char *t)
228 {
229 if (!(k->f & f_lock))
230 return;
231 if (t)
232 dstr_putf(&k->tag, ".%s", t);
233 if (key_plock(k->tag.buf, kd, kd))
234 die(EXIT_FAILURE, "couldn't lock key");
235 }
236
237 /* --- @mpkey@ --- *
238 *
239 * Arguments: @key_data *kd@ = pointer to parent key block
240 * @const char *tag@ = pointer to tag string
241 * @mp *m@ = integer to store
242 * @unsigned f@ = flags to set
243 *
244 * Returns: ---
245 *
246 * Use: Sets a multiprecision integer subkey.
247 */
248
249 static void mpkey(key_data *kd, const char *tag, mp *m, unsigned f)
250 {
251 key_data *kkd = key_structcreate(kd, tag);
252 key_mp(kkd, m);
253 kkd->e |= f;
254 }
255
256 /* --- @copyparam@ --- *
257 *
258 * Arguments: @keyopts *k@ = pointer to key options
259 * @const char **pp@ = checklist of parameters
260 *
261 * Returns: Nonzero if parameters copied; zero if you have to generate
262 * them.
263 *
264 * Use: Copies parameters from a source key to the current one.
265 */
266
267 static int copyparam(keyopts *k, const char **pp)
268 {
269 key_filter kf;
270
271 /* --- Quick check if no parameters supplied --- */
272
273 if (!k->p)
274 return (0);
275
276 /* --- Run through the checklist --- */
277
278 while (*pp) {
279 key_data *kd = key_structfind(&k->p->k, *pp);
280 if (!kd)
281 die(EXIT_FAILURE, "bad parameter key: parameter `%s' not found", *pp);
282 if ((kd->e & KF_CATMASK) != KCAT_SHARE)
283 die(EXIT_FAILURE, "bad parameter key: subkey `%s' is not shared", *pp);
284 pp++;
285 }
286
287 /* --- Copy over the parameters --- */
288
289 kf.f = KCAT_SHARE;
290 kf.m = KF_CATMASK;
291 if (!key_copy(&k->k->k, &k->p->k, &kf))
292 die(EXIT_FAILURE, "unexpected failure while copying parameters");
293 return (1);
294 }
295
296 /* --- @getmp@ --- *
297 *
298 * Arguments: @key_data *k@ = pointer to key data block
299 * @const char *tag@ = tag string to use
300 *
301 * Returns: Pointer to multiprecision integer key item.
302 *
303 * Use: Fetches an MP key component.
304 */
305
306 static mp *getmp(key_data *k, const char *tag)
307 {
308 k = key_structfind(k, tag);
309 if (!k)
310 die(EXIT_FAILURE, "unexpected failure looking up subkey `%s'", tag);
311 if ((k->e & KF_ENCMASK) != KENC_MP)
312 die(EXIT_FAILURE, "subkey `%s' has an incompatible type");
313 return (k->u.m);
314 }
315
316 /* --- @keyrand@ --- *
317 *
318 * Arguments: @key_file *kf@ = pointer to key file
319 * @const char *id@ = pointer to key id (or null)
320 *
321 * Returns: ---
322 *
323 * Use: Keys the random number generator.
324 */
325
326 static void keyrand(key_file *kf, const char *id)
327 {
328 key *k;
329
330 /* --- Find the key --- */
331
332 if (id) {
333 if ((k = key_bytag(kf, id)) == 0)
334 die(EXIT_FAILURE, "key `%s' not found", id);
335 } else
336 k = key_bytype(kf, "catacomb-rand");
337
338 if (k) {
339 key_data *kd = &k->k, kkd;
340
341 again:
342 switch (kd->e & KF_ENCMASK) {
343 case KENC_BINARY:
344 break;
345 case KENC_ENCRYPT: {
346 dstr d = DSTR_INIT;
347 key_fulltag(k, &d);
348 if (key_punlock(d.buf, kd, &kkd))
349 die(EXIT_FAILURE, "error unlocking key `%s'", d.buf);
350 dstr_destroy(&d);
351 kd = &kkd;
352 } goto again;
353 default: {
354 dstr d = DSTR_INIT;
355 key_fulltag(k, &d);
356 die(EXIT_FAILURE, "bad encoding type for key `%s'", d.buf);
357 } break;
358 }
359
360 /* --- Key the generator --- */
361
362 rand_key(RAND_GLOBAL, kd->u.k.k, kd->u.k.sz);
363 if (kd == &kkd)
364 key_destroy(&kkd);
365 }
366 }
367
368 /* --- Key generation algorithms --- */
369
370 static void alg_binary(keyopts *k)
371 {
372 unsigned sz;
373 unsigned m;
374 octet *p;
375
376 if (!k->bits)
377 k->bits = 128;
378 if (k->p)
379 die(EXIT_FAILURE, "no shared parameters for binary keys");
380
381 sz = (k->bits + 7) >> 3;
382 p = sub_alloc(sz);
383 m = (1 << (((k->bits - 1) & 7) + 1)) - 1;
384 rand_get(RAND_GLOBAL, p, sz);
385 *p &= m;
386 key_binary(&k->k->k, p, sz);
387 k->k->k.e |= KCAT_SYMM | KF_BURN;
388 memset(p, 0, sz);
389 sub_free(p, sz);
390 dolock(k, &k->k->k, 0);
391 }
392
393 static void alg_des(keyopts *k)
394 {
395 unsigned sz;
396 octet *p;
397 int i;
398
399 if (!k->bits)
400 k->bits = 112;
401 if (k->p)
402 die(EXIT_FAILURE, "no shared parameters for DES keys");
403 if (k->bits % 56 || k->bits > 168)
404 die(EXIT_FAILURE, "DES keys must be 56, 112 or 168 bits long");
405
406 sz = k->bits / 7;
407 p = sub_alloc(sz);
408 rand_get(RAND_GLOBAL, p, sz); /* Too much work done here! */
409 for (i = 0; i < sz; i++) {
410 octet x = p[i] | 0x01;
411 x = x ^ (x >> 4);
412 x = x ^ (x >> 2);
413 x = x ^ (x >> 1);
414 p[i] = (p[i] & 0xfe) | (x & 0x01);
415 }
416 key_binary(&k->k->k, p, sz);
417 k->k->k.e |= KCAT_SYMM | KF_BURN;
418 memset(p, 0, sz);
419 sub_free(p, sz);
420 dolock(k, &k->k->k, 0);
421 }
422
423 static void alg_rsa(keyopts *k)
424 {
425 rsa_priv rp;
426 key_data *kd;
427
428 /* --- Sanity checking --- */
429
430 if (k->p)
431 die(EXIT_FAILURE, "no shared parameters for RSA keys");
432 if (!k->bits)
433 k->bits = 1024;
434
435 /* --- Generate the RSA parameters --- */
436
437 if (rsa_gen(&rp, k->bits, &rand_global, 0,
438 (k->f & f_quiet) ? 0 : pgen_ev, 0))
439 die(EXIT_FAILURE, "RSA key generation failed");
440
441 /* --- Run a test encryption --- */
442
443 {
444 grand *g = fibrand_create(rand_global.ops->word(&rand_global));
445 rsa_pub rpp;
446 mp *m = mprand_range(MP_NEW, rp.n, g, 0);
447 mp *c;
448
449 rpp.n = rp.n;
450 rpp.e = rp.e;
451 c = rsa_qpubop(&rpp, MP_NEW, m);
452 c = rsa_qprivop(&rp, c, c, g);
453
454 if (!MP_EQ(c, m))
455 die(EXIT_FAILURE, "test encryption failed");
456 mp_drop(c);
457 mp_drop(m);
458 g->ops->destroy(g);
459 }
460
461 /* --- Allrighty then --- */
462
463 kd = &k->k->k;
464 key_structure(kd);
465 mpkey(kd, "n", rp.n, KCAT_PUB);
466 mpkey(kd, "e", rp.e, KCAT_PUB);
467
468 kd = key_structcreate(kd, "private");
469 key_structure(kd);
470 mpkey(kd, "d", rp.d, KCAT_PRIV | KF_BURN);
471 mpkey(kd, "p", rp.p, KCAT_PRIV | KF_BURN);
472 mpkey(kd, "q", rp.q, KCAT_PRIV | KF_BURN);
473 mpkey(kd, "q-inv", rp.q_inv, KCAT_PRIV | KF_BURN);
474 mpkey(kd, "d-mod-p", rp.dp, KCAT_PRIV | KF_BURN);
475 mpkey(kd, "d-mod-q", rp.dq, KCAT_PRIV | KF_BURN);
476 dolock(k, kd, "private");
477
478 rsa_privfree(&rp);
479 }
480
481 static void alg_dsaparam(keyopts *k)
482 {
483 static const char *pl[] = { "q", "p", "g", 0 };
484 if (!copyparam(k, pl)) {
485 dsa_param dp;
486 octet *p;
487 size_t sz;
488 dstr d = DSTR_INIT;
489 base64_ctx c;
490 key_data *kd = &k->k->k;
491 dsa_seed ds;
492
493 /* --- Choose appropriate bit lengths if necessary --- */
494
495 if (!k->qbits)
496 k->qbits = 160;
497 if (!k->bits)
498 k->bits = 768;
499
500 /* --- Allocate a seed block --- */
501
502 sz = (k->qbits + 7) >> 3;
503 p = sub_alloc(sz);
504 rand_get(RAND_GLOBAL, p, sz);
505
506 /* --- Allocate the parameters --- */
507
508 if (dsa_gen(&dp, k->qbits, k->bits, 0, p, sz, &ds,
509 (k->f & f_quiet) ? 0 : pgen_ev, 0))
510 die(EXIT_FAILURE, "DSA parameter generation failed");
511
512 /* --- Store the parameters --- */
513
514 key_structure(kd);
515 mpkey(kd, "q", dp.q, KCAT_SHARE);
516 mpkey(kd, "p", dp.p, KCAT_SHARE);
517 mpkey(kd, "g", dp.g, KCAT_SHARE);
518 mp_drop(dp.q);
519 mp_drop(dp.p);
520 mp_drop(dp.g);
521
522 /* --- Store the seed for future verification --- */
523
524 base64_init(&c);
525 c.maxline = 0;
526 c.indent = "";
527 base64_encode(&c, ds.p, ds.sz, &d);
528 base64_encode(&c, 0, 0, &d);
529 key_putattr(k->kf, k->k, "seed", d.buf);
530 DRESET(&d);
531 dstr_putf(&d, "%u", ds.count);
532 key_putattr(k->kf, k->k, "count", d.buf);
533 xfree(ds.p);
534 sub_free(p, sz);
535 dstr_destroy(&d);
536 }
537 }
538
539 static void alg_dsa(keyopts *k)
540 {
541 mp *q, *p, *g;
542 mp *x, *y;
543 mpmont mm;
544 key_data *kd = &k->k->k;
545
546 /* --- Get the shared parameters --- */
547
548 alg_dsaparam(k);
549 q = getmp(kd, "q");
550 p = getmp(kd, "p");
551 g = getmp(kd, "g");
552
553 /* --- Choose a private key --- */
554
555 x = mprand_range(MP_NEWSEC, q, &rand_global, 0);
556 mpmont_create(&mm, p);
557 y = mpmont_exp(&mm, MP_NEW, g, x);
558
559 /* --- Store everything away --- */
560
561 mpkey(kd, "y", y, KCAT_PUB);
562
563 kd = key_structcreate(kd, "private");
564 key_structure(kd);
565 mpkey(kd, "x", x, KCAT_PRIV | KF_BURN);
566 dolock(k, kd, "private");
567
568 mp_drop(x); mp_drop(y);
569 }
570
571 static void alg_dhparam(keyopts *k)
572 {
573 static const char *pl[] = { "p", "q", "g", 0 };
574 if (!copyparam(k, pl)) {
575 dh_param dp;
576 key_data *kd = &k->k->k;
577 int rc;
578
579 if (!k->bits)
580 k->bits = 1024;
581
582 /* --- Choose a large safe prime number --- */
583
584 if (k->f & f_limlee) {
585 mp **f;
586 size_t nf;
587 if (!k->qbits)
588 k->qbits = 256;
589 rc = dh_limlee(&dp, k->qbits, k->bits,
590 (k->f & f_subgroup) ? DH_SUBGROUP : 0,
591 0, &rand_global, (k->f & f_quiet) ? 0 : pgen_ev, 0,
592 (k->f & f_quiet) ? 0 : pgen_evspin, 0, &nf, &f);
593 if (!rc) {
594 dstr d = DSTR_INIT;
595 size_t i;
596 for (i = 0; i < nf; i++) {
597 if (i)
598 dstr_puts(&d, ", ");
599 mp_writedstr(f[i], &d, 10);
600 mp_drop(f[i]);
601 }
602 key_putattr(k->kf, k->k, "factors", d.buf);
603 dstr_destroy(&d);
604 }
605 } else
606 rc = dh_gen(&dp, k->qbits, k->bits, 0, &rand_global,
607 (k->f & f_quiet) ? 0 : pgen_ev, 0);
608
609 if (rc)
610 die(EXIT_FAILURE, "Diffie-Hellman parameter generation failed");
611
612 key_structure(kd);
613 mpkey(kd, "p", dp.p, KCAT_SHARE);
614 mpkey(kd, "q", dp.q, KCAT_SHARE);
615 mpkey(kd, "g", dp.g, KCAT_SHARE);
616 mp_drop(dp.q);
617 mp_drop(dp.p);
618 mp_drop(dp.g);
619 }
620 }
621
622 static void alg_dh(keyopts *k)
623 {
624 mp *x, *y;
625 mp *p, *q, *g;
626 mpmont mm;
627 key_data *kd = &k->k->k;
628
629 /* --- Get the shared parameters --- */
630
631 alg_dhparam(k);
632 p = getmp(kd, "p");
633 q = getmp(kd, "q");
634 g = getmp(kd, "g");
635
636 /* --- Choose a suitable private key --- *
637 *
638 * Since %$g$% has order %$q$%, choose %$x < q$%.
639 */
640
641 x = mprand_range(MP_NEWSEC, q, &rand_global, 0);
642
643 /* --- Compute the public key %$y = g^x \bmod p$% --- */
644
645 mpmont_create(&mm, p);
646 y = mpmont_exp(&mm, MP_NEW, g, x);
647 mpmont_destroy(&mm);
648
649 /* --- Store everything away --- */
650
651 mpkey(kd, "y", y, KCAT_PUB);
652
653 kd = key_structcreate(kd, "private");
654 key_structure(kd);
655 mpkey(kd, "x", x, KCAT_PRIV | KF_BURN);
656 dolock(k, kd, "private");
657
658 mp_drop(x); mp_drop(y);
659 }
660
661 static void alg_bbs(keyopts *k)
662 {
663 bbs_priv bp;
664 key_data *kd;
665
666 /* --- Sanity checking --- */
667
668 if (k->p)
669 die(EXIT_FAILURE, "no shared parameters for Blum-Blum-Shub keys");
670 if (!k->bits)
671 k->bits = 1024;
672
673 /* --- Generate the BBS parameters --- */
674
675 if (bbs_gen(&bp, k->bits, &rand_global, 0,
676 (k->f & f_quiet) ? 0 : pgen_ev, 0))
677 die(EXIT_FAILURE, "Blum-Blum-Shub key generation failed");
678
679 /* --- Allrighty then --- */
680
681 kd = &k->k->k;
682 key_structure(kd);
683 mpkey(kd, "n", bp.n, KCAT_PUB);
684
685 kd = key_structcreate(kd, "private");
686 key_structure(kd);
687 mpkey(kd, "p", bp.p, KCAT_PRIV | KF_BURN);
688 mpkey(kd, "q", bp.q, KCAT_PRIV | KF_BURN);
689 dolock(k, kd, "private");
690
691 bbs_privfree(&bp);
692 }
693
694 /* --- The algorithm tables --- */
695
696 typedef struct keyalg {
697 const char *name;
698 void (*proc)(keyopts *o);
699 const char *help;
700 } keyalg;
701
702 static keyalg algtab[] = {
703 { "binary", alg_binary, "Plain binary data" },
704 { "des", alg_des, "Binary with DES-style parity" },
705 { "rsa", alg_rsa, "RSA public-key encryption" },
706 { "dsa", alg_dsa, "DSA digital signatures" },
707 { "dsa-param", alg_dsaparam, "DSA shared parameters" },
708 { "dh", alg_dh, "Diffie-Hellman key exchange" },
709 { "dh-param", alg_dhparam, "Diffie-Hellman parameters" },
710 { "bbs", alg_bbs, "Blum-Blum-Shub generator" },
711 { 0, 0 }
712 };
713
714 /* --- @cmd_add@ --- */
715
716 static int cmd_add(int argc, char *argv[])
717 {
718 key_file f;
719 time_t exp = KEXP_EXPIRE;
720 const char *tag = 0, *ptag = 0;
721 const char *c = 0;
722 keyalg *alg = algtab;
723 const char *rtag = 0;
724 keyopts k = { 0, 0, DSTR_INIT, 0, 0, 0, 0 };
725
726 /* --- Parse options for the subcommand --- */
727
728 for (;;) {
729 static struct option opt[] = {
730 { "algorithm", OPTF_ARGREQ, 0, 'a' },
731 { "bits", OPTF_ARGREQ, 0, 'b' },
732 { "qbits", OPTF_ARGREQ, 0, 'B' },
733 { "parameters", OPTF_ARGREQ, 0, 'p' },
734 { "expire", OPTF_ARGREQ, 0, 'e' },
735 { "comment", OPTF_ARGREQ, 0, 'c' },
736 { "tag", OPTF_ARGREQ, 0, 't' },
737 { "rand-id", OPTF_ARGREQ, 0, 'R' },
738 { "lock", 0, 0, 'l' },
739 { "quiet", 0, 0, 'q' },
740 { "lim-lee", 0, 0, 'L' },
741 { "subgroup", 0, 0, 'S' },
742 { 0, 0, 0, 0 }
743 };
744 int i = mdwopt(argc, argv, "+a:b:B:p:e:c:t:R:lqrLS", opt, 0, 0, 0);
745 if (i < 0)
746 break;
747
748 /* --- Handle the various options --- */
749
750 switch (i) {
751
752 /* --- Read an algorithm name --- */
753
754 case 'a': {
755 keyalg *a;
756 size_t sz = strlen(optarg);
757
758 if (strcmp(optarg, "list") == 0) {
759 for (a = algtab; a->name; a++)
760 printf("%-10s %s\n", a->name, a->help);
761 return (0);
762 }
763
764 alg = 0;
765 for (a = algtab; a->name; a++) {
766 if (strncmp(optarg, a->name, sz) == 0) {
767 if (a->name[sz] == 0) {
768 alg = a;
769 break;
770 } else if (alg)
771 die(EXIT_FAILURE, "ambiguous algorithm name `%s'", optarg);
772 else
773 alg = a;
774 }
775 }
776 if (!alg)
777 die(EXIT_FAILURE, "unknown algorithm name `%s'", optarg);
778 } break;
779
780 /* --- Bits must be nonzero and a multiple of 8 --- */
781
782 case 'b': {
783 char *p;
784 k.bits = strtoul(optarg, &p, 0);
785 if (k.bits == 0 || *p != 0)
786 die(EXIT_FAILURE, "bad bitlength `%s'", optarg);
787 } break;
788
789 case 'B': {
790 char *p;
791 k.qbits = strtoul(optarg, &p, 0);
792 if (k.qbits == 0 || *p != 0)
793 die(EXIT_FAILURE, "bad bitlength `%s'", optarg);
794 } break;
795
796 /* --- Parameter selection --- */
797
798 case 'p':
799 ptag = optarg;
800 break;
801
802 /* --- Expiry dates get passed to @get_date@ for parsing --- */
803
804 case 'e':
805 if (strncmp(optarg, "forever", strlen(optarg)) == 0)
806 exp = KEXP_FOREVER;
807 else {
808 exp = get_date(optarg, 0);
809 if (exp == -1)
810 die(EXIT_FAILURE, "bad expiry date `%s'", optarg);
811 }
812 break;
813
814 /* --- Store comments without interpretation --- */
815
816 case 'c':
817 if (key_chkcomment(optarg))
818 die(EXIT_FAILURE, "bad comment string `%s'", optarg);
819 c = optarg;
820 break;
821
822 /* --- Store tags --- */
823
824 case 't':
825 if (key_chkident(optarg))
826 die(EXIT_FAILURE, "bad tag string `%s'", optarg);
827 tag = optarg;
828 break;
829 case 'r':
830 k.f |= f_retag;
831 break;
832
833 /* --- Other flags --- */
834
835 case 'R':
836 rtag = optarg;
837 break;
838 case 'l':
839 k.f |= f_lock;
840 break;
841 case 'q':
842 k.f |= f_quiet;
843 break;
844 case 'L':
845 k.f |= f_limlee;
846 break;
847 case 'S':
848 k.f |= f_subgroup;
849 break;
850
851 /* --- Other things are bogus --- */
852
853 default:
854 k.f |= f_bogus;
855 break;
856 }
857 }
858
859 /* --- Various sorts of bogosity --- */
860
861 if ((k.f & f_bogus) || optind + 1 > argc) {
862 die(EXIT_FAILURE,
863 "Usage: add [options] type [attr...]");
864 }
865 if (key_chkident(argv[optind]))
866 die(EXIT_FAILURE, "bad key type `%s'", argv[optind]);
867
868 /* --- Set up various bits of the state --- */
869
870 if (exp == KEXP_EXPIRE)
871 exp = time(0) + 14 * 24 * 60 * 60;
872
873 /* --- Open the file and create the basic key block --- *
874 *
875 * Keep on generating keyids until one of them doesn't collide.
876 */
877
878 doopen(&f, KOPEN_WRITE);
879 k.kf = &f;
880
881 /* --- Key the generator --- */
882
883 keyrand(&f, rtag);
884
885 for (;;) {
886 uint32 id = rand_global.ops->word(&rand_global);
887 int err;
888 k.k = key_new(&f, id, argv[optind], exp, &err);
889 if (k.k)
890 break;
891 if (err != KERR_DUPID)
892 die(EXIT_FAILURE, "error adding new key: %s", key_strerror(err));
893 }
894
895 /* --- Set various simple attributes --- */
896
897 if (tag) {
898 int err;
899 key *kk;
900 if (k.f & f_retag) {
901 if ((kk = key_bytag(&f, tag)) != 0 && strcmp(kk->tag, tag) == 0)
902 key_settag(&f, kk, 0);
903 }
904 if ((err = key_settag(&f, k.k, tag)) != 0)
905 die(EXIT_FAILURE, "error setting key tag: %s", key_strerror(err));
906 }
907
908 if (c) {
909 int err = key_setcomment(&f, k.k, c);
910 if (err)
911 die(EXIT_FAILURE, "error setting key comment: %s", key_strerror(err));
912 }
913
914 setattr(&f, k.k, argv + optind + 1);
915
916 key_fulltag(k.k, &k.tag);
917
918 /* --- Find the parameter key --- */
919
920 if (ptag) {
921 if ((k.p = key_bytag(&f, ptag)) == 0)
922 die(EXIT_FAILURE, "parameter key `%s' not found", ptag);
923 if ((k.p->k.e & KF_ENCMASK) != KENC_STRUCT)
924 die(EXIT_FAILURE, "parameter key `%s' is not structured", ptag);
925 }
926
927 /* --- Now generate the actual key data --- */
928
929 alg->proc(&k);
930
931 /* --- Done --- */
932
933 doclose(&f);
934 return (0);
935 }
936
937 /*----- Key listing -------------------------------------------------------*/
938
939 /* --- Listing options --- */
940
941 typedef struct listopts {
942 const char *tfmt; /* Date format (@strftime@-style) */
943 int v; /* Verbosity level */
944 unsigned f; /* Various flags */
945 time_t t; /* Time now (for key expiry) */
946 key_filter kf; /* Filter for matching keys */
947 } listopts;
948
949 /* --- Listing flags --- */
950
951 #define f_newline 2u /* Write newline before next entry */
952 #define f_attr 4u /* Written at least one attribute */
953 #define f_utc 8u /* Emit UTC time, not local time */
954
955 /* --- @showkeydata@ --- *
956 *
957 * Arguments: @key_data *k@ = pointer to key to write
958 * @int ind@ = indentation level
959 * @listopts *o@ = listing options
960 * @dstr *d@ = tag string for this subkey
961 *
962 * Returns: ---
963 *
964 * Use: Emits a piece of key data in a human-readable format.
965 */
966
967 static void showkeydata(key_data *k, int ind, listopts *o, dstr *d)
968 {
969 #define INDENT(i) do { \
970 int _i; \
971 for (_i = 0; _i < (i); _i++) { \
972 putchar(' '); \
973 } \
974 } while (0)
975
976 switch (k->e & KF_ENCMASK) {
977
978 /* --- Binary key data --- *
979 *
980 * Emit as a simple hex dump.
981 */
982
983 case KENC_BINARY: {
984 const octet *p = k->u.k.k;
985 const octet *l = p + k->u.k.sz;
986 size_t sz = 0;
987
988 fputs(" {", stdout);
989 while (p < l) {
990 if (sz % 16 == 0) {
991 putchar('\n');
992 INDENT(ind + 2);
993 } else if (sz % 8 == 0)
994 fputs(" ", stdout);
995 else
996 putc(' ', stdout);
997 printf("%02x", *p++);
998 sz++;
999 }
1000 putchar('\n');
1001 INDENT(ind);
1002 fputs("}\n", stdout);
1003 } break;
1004
1005 /* --- Encrypted data --- *
1006 *
1007 * If the user is sufficiently keen, ask for a passphrase and decrypt the
1008 * key. Otherwise just say that it's encrypted and move on.
1009 */
1010
1011 case KENC_ENCRYPT:
1012 if (o->v <= 3)
1013 fputs(" encrypted\n", stdout);
1014 else {
1015 key_data kd;
1016 if (key_punlock(d->buf, k, &kd))
1017 printf(" <failed to unlock %s>\n", d->buf);
1018 else {
1019 fputs(" encrypted", stdout);
1020 showkeydata(&kd, ind, o, d);
1021 key_destroy(&kd);
1022 }
1023 }
1024 break;
1025
1026 /* --- Integer keys --- *
1027 *
1028 * Emit as a large integer in decimal. This makes using the key in
1029 * `calc' or whatever easier.
1030 */
1031
1032 case KENC_MP:
1033 putchar(' ');
1034 mp_writefile(k->u.m, stdout, 10);
1035 putchar('\n');
1036 break;
1037
1038 /* --- Structured keys --- *
1039 *
1040 * Just iterate over the subkeys.
1041 */
1042
1043 case KENC_STRUCT: {
1044 sym_iter i;
1045 key_struct *ks;
1046 size_t n = d->len;
1047
1048 fputs(" {\n", stdout);
1049 for (sym_mkiter(&i, &k->u.s); (ks = sym_next(&i)) != 0; ) {
1050 if (!key_match(&ks->k, &o->kf))
1051 continue;
1052 INDENT(ind + 2);
1053 printf("%s =", SYM_NAME(ks));
1054 d->len = n;
1055 dstr_putf(d, ".%s", SYM_NAME(ks));
1056 showkeydata(&ks->k, ind + 2, o, d);
1057 }
1058 INDENT(ind);
1059 fputs("}\n", stdout);
1060 } break;
1061 }
1062
1063 #undef INDENT
1064 }
1065
1066 /* --- @showkey@ --- *
1067 *
1068 * Arguments: @key *k@ = pointer to key to show
1069 * @listopts *o@ = pointer to listing options
1070 *
1071 * Returns: ---
1072 *
1073 * Use: Emits a listing of a particular key.
1074 */
1075
1076 static void showkey(key *k, listopts *o)
1077 {
1078 char ebuf[24], dbuf[24];
1079 struct tm *tm;
1080
1081 /* --- Skip the key if the filter doesn't match --- */
1082
1083 if (!key_match(&k->k, &o->kf))
1084 return;
1085
1086 /* --- Sort out the expiry and deletion times --- */
1087
1088 if (KEY_EXPIRED(o->t, k->exp))
1089 strcpy(ebuf, "expired");
1090 else if (k->exp == KEXP_FOREVER)
1091 strcpy(ebuf, "forever");
1092 else {
1093 tm = (o->f & f_utc) ? gmtime(&k->exp) : localtime(&k->exp);
1094 strftime(ebuf, sizeof(ebuf), o->tfmt, tm);
1095 }
1096
1097 if (KEY_EXPIRED(o->t, k->del))
1098 strcpy(dbuf, "deleted");
1099 else if (k->del == KEXP_FOREVER)
1100 strcpy(dbuf, "forever");
1101 else {
1102 tm = (o->f & f_utc) ? gmtime(&k->del) : localtime(&k->del);
1103 strftime(dbuf, sizeof(dbuf), o->tfmt, tm);
1104 }
1105
1106 /* --- If in compact format, just display and quit --- */
1107
1108 if (!o->v) {
1109 if (!(o->f & f_newline)) {
1110 printf("%8s %-20s %-20s %-10s %-10s\n",
1111 "Id", "Tag", "Type", "Expire", "Delete");
1112 }
1113 printf("%08lx %-20s %-20s %-10s %-10s\n",
1114 (unsigned long)k->id, k->tag ? k->tag : "<none>",
1115 k->type, ebuf, dbuf);
1116 o->f |= f_newline;
1117 return;
1118 }
1119
1120 /* --- Display the standard header --- */
1121
1122 if (o->f & f_newline)
1123 fputc('\n', stdout);
1124 printf("keyid: %08lx\n", (unsigned long)k->id);
1125 printf("tag: %s\n", k->tag ? k->tag : "<none>");
1126 printf("type: %s\n", k->type);
1127 printf("expiry: %s\n", ebuf);
1128 printf("delete: %s\n", dbuf);
1129 printf("comment: %s\n", k->c ? k->c : "<none>");
1130
1131 /* --- Display the attributes --- */
1132
1133 if (o->v > 1) {
1134 key_attriter i;
1135 const char *av, *an;
1136
1137 o->f &= ~f_attr;
1138 printf("attributes:");
1139 for (key_mkattriter(&i, k); key_nextattr(&i, &an, &av); ) {
1140 printf("\n %s = %s", an, av);
1141 o->f |= f_attr;
1142 }
1143 if (o->f & f_attr)
1144 fputc('\n', stdout);
1145 else
1146 puts(" <none>");
1147 }
1148
1149 /* --- If dumping requested, dump the raw key data --- */
1150
1151 if (o->v > 2) {
1152 dstr d = DSTR_INIT;
1153 fputs("key:", stdout);
1154 key_fulltag(k, &d);
1155 showkeydata(&k->k, 0, o, &d);
1156 dstr_destroy(&d);
1157 }
1158
1159 o->f |= f_newline;
1160 }
1161
1162 /* --- @cmd_list@ --- */
1163
1164 static int cmd_list(int argc, char *argv[])
1165 {
1166 key_file f;
1167 key *k;
1168 listopts o = { 0, 0, 0, 0, { 0, 0 } };
1169
1170 /* --- Parse subcommand options --- */
1171
1172 for (;;) {
1173 static struct option opt[] = {
1174 { "quiet", 0, 0, 'q' },
1175 { "verbose", 0, 0, 'v' },
1176 { "utc", 0, 0, 'u' },
1177 { "filter", OPTF_ARGREQ, 0, 'f' },
1178 { 0, 0, 0, 0 }
1179 };
1180 int i = mdwopt(argc, argv, "+uqvf:", opt, 0, 0, 0);
1181 if (i < 0)
1182 break;
1183
1184 switch (i) {
1185 case 'u':
1186 o.f |= f_utc;
1187 break;
1188 case 'q':
1189 if (o.v)
1190 o.v--;
1191 break;
1192 case 'v':
1193 o.v++;
1194 break;
1195 case 'f': {
1196 char *p;
1197 int e = key_readflags(optarg, &p, &o.kf.f, &o.kf.m);
1198 if (e || *p)
1199 die(EXIT_FAILURE, "bad filter string `%s'", optarg);
1200 } break;
1201 default:
1202 o.f |= f_bogus;
1203 break;
1204 }
1205 }
1206
1207 if (o.f & f_bogus)
1208 die(EXIT_FAILURE, "Usage: list [-uqv] [-f filter] [tag...]");
1209
1210 /* --- Open the key file --- */
1211
1212 doopen(&f, KOPEN_READ);
1213 o.t = time(0);
1214
1215 /* --- Set up the time format --- */
1216
1217 if (!o.v)
1218 o.tfmt = "%Y-%m-%d";
1219 else if (o.f & f_utc)
1220 o.tfmt = "%Y-%m-%d %H:%M:%S UTC";
1221 else
1222 o.tfmt = "%Y-%m-%d %H:%M:%S %Z";
1223
1224 /* --- If specific keys were requested use them, otherwise do all --- *
1225 *
1226 * Some day, this might turn into a wildcard match.
1227 */
1228
1229 if (optind < argc) {
1230 do {
1231 if ((k = key_bytag(&f, argv[optind])) != 0)
1232 showkey(k, &o);
1233 else {
1234 moan("key `%s' not found", argv[optind]);
1235 o.f |= f_bogus;
1236 }
1237 optind++;
1238 } while (optind < argc);
1239 } else {
1240 key_iter i;
1241 for (key_mkiter(&i, &f); (k = key_next(&i)) != 0; )
1242 showkey(k, &o);
1243 }
1244
1245 /* --- Done --- */
1246
1247 doclose(&f);
1248 if (o.f & f_bogus)
1249 return (EXIT_FAILURE);
1250 else
1251 return (0);
1252 }
1253
1254 /*----- Command implementation --------------------------------------------*/
1255
1256 /* --- @cmd_expire@ --- */
1257
1258 static int cmd_expire(int argc, char *argv[])
1259 {
1260 key_file f;
1261 key *k;
1262 int i;
1263 int rc = 0;
1264
1265 if (argc < 2)
1266 die(EXIT_FAILURE, "Usage: expire tag...");
1267 doopen(&f, KOPEN_WRITE);
1268 for (i = 1; i < argc; i++) {
1269 if ((k = key_bytag(&f, argv[i])) != 0)
1270 key_expire(&f, k);
1271 else {
1272 moan("key `%s' not found", argv[i]);
1273 rc = 1;
1274 }
1275 }
1276 doclose(&f);
1277 return (rc);
1278 }
1279
1280 /* --- @cmd_delete@ --- */
1281
1282 static int cmd_delete(int argc, char *argv[])
1283 {
1284 key_file f;
1285 key *k;
1286 int i;
1287 int rc = 0;
1288
1289 if (argc < 2)
1290 die(EXIT_FAILURE, "Usage: delete tag...");
1291 doopen(&f, KOPEN_WRITE);
1292 for (i = 1; i < argc; i++) {
1293 if ((k = key_bytag(&f, argv[i])) != 0)
1294 key_delete(&f, k);
1295 else {
1296 moan("key `%s' not found", argv[i]);
1297 rc = 1;
1298 }
1299 }
1300 doclose(&f);
1301 return (rc);
1302 }
1303
1304 /* --- @cmd_setattr@ --- */
1305
1306 static int cmd_setattr(int argc, char *argv[])
1307 {
1308 key_file f;
1309 key *k;
1310
1311 if (argc < 3)
1312 die(EXIT_FAILURE, "Usage: setattr tag attr...");
1313 doopen(&f, KOPEN_WRITE);
1314 if ((k = key_bytag(&f, argv[1])) == 0)
1315 die(EXIT_FAILURE, "key `%s' not found", argv[1]);
1316 setattr(&f, k, argv + 2);
1317 doclose(&f);
1318 return (0);
1319 }
1320
1321 /* --- @cmd_finger@ --- */
1322
1323 static void fingerprint(key *k, const key_filter *kf)
1324 {
1325 rmd160_ctx r;
1326 octet hash[RMD160_HASHSZ];
1327 dstr d = DSTR_INIT;
1328 int i;
1329
1330 if (!key_encode(&k->k, &d, kf))
1331 return;
1332 rmd160_init(&r);
1333 rmd160_hash(&r, d.buf, d.len);
1334 rmd160_done(&r, hash);
1335
1336 DRESET(&d);
1337 key_fulltag(k, &d);
1338 for (i = 0; i < sizeof(hash); i++) {
1339 if (i && i % 4 == 0)
1340 putchar('-');
1341 printf("%02x", hash[i]);
1342 }
1343 printf(" %s\n", d.buf);
1344 dstr_destroy(&d);
1345 }
1346
1347 static int cmd_finger(int argc, char *argv[])
1348 {
1349 key_file f;
1350 int rc = 0;
1351 key_filter kf = { KF_NONSECRET, KF_NONSECRET };
1352
1353 for (;;) {
1354 static struct option opt[] = {
1355 { "filter", OPTF_ARGREQ, 0, 'f' },
1356 { 0, 0, 0, 0 }
1357 };
1358 int i = mdwopt(argc, argv, "+f:", opt, 0, 0, 0);
1359 if (i < 0)
1360 break;
1361 switch (i) {
1362 case 'f': {
1363 char *p;
1364 int err = key_readflags(optarg, &p, &kf.f, &kf.m);
1365 if (err || *p)
1366 die(EXIT_FAILURE, "bad filter string `%s'", optarg);
1367 } break;
1368 default:
1369 rc = 1;
1370 break;
1371 }
1372 }
1373
1374 argv += optind; argc -= optind;
1375 if (rc)
1376 die(EXIT_FAILURE, "Usage: fingerprint [-f filter] [tag...]");
1377
1378 doopen(&f, KOPEN_READ);
1379
1380 if (argc) {
1381 int i;
1382 for (i = 0; i < argc; i++) {
1383 key *k = key_bytag(&f, argv[i]);
1384 if (k)
1385 fingerprint(k, &kf);
1386 else {
1387 rc = 1;
1388 moan("key `%s' not found", argv[i]);
1389 }
1390 }
1391 } else {
1392 key_iter i;
1393 key *k;
1394 for (key_mkiter(&i, &f); (k = key_next(&i)) != 0; )
1395 fingerprint(k, &kf);
1396 }
1397 return (rc);
1398 }
1399
1400 /* --- @cmd_comment@ --- */
1401
1402 static int cmd_comment(int argc, char *argv[])
1403 {
1404 key_file f;
1405 key *k;
1406 int err;
1407
1408 if (argc < 2 || argc > 3)
1409 die(EXIT_FAILURE, "Usage: comment tag [comment]");
1410 doopen(&f, KOPEN_WRITE);
1411 if ((k = key_bytag(&f, argv[1])) == 0)
1412 die(EXIT_FAILURE, "key `%s' not found", argv[1]);
1413 if ((err = key_setcomment(&f, k, argv[2])) != 0)
1414 die(EXIT_FAILURE, "bad comment `%s': %s", argv[2], key_strerror(err));
1415 doclose(&f);
1416 return (0);
1417 }
1418
1419 /* --- @cmd_tag@ --- */
1420
1421 static int cmd_tag(int argc, char *argv[])
1422 {
1423 key_file f;
1424 key *k;
1425 int err;
1426 unsigned flags = 0;
1427 int rc = 0;
1428
1429 for (;;) {
1430 static struct option opt[] = {
1431 { "retag", 0, 0, 'r' },
1432 { 0, 0, 0, 0 }
1433 };
1434 int i = mdwopt(argc, argv, "+r", opt, 0, 0, 0);
1435 if (i < 0)
1436 break;
1437 switch (i) {
1438 case 'r':
1439 flags |= f_retag;
1440 break;
1441 default:
1442 rc = 1;
1443 break;
1444 }
1445 }
1446
1447 argv += optind; argc -= optind;
1448 if (argc < 1 || argc > 2 || rc)
1449 die(EXIT_FAILURE, "Usage: tag [-r] tag [new-tag]");
1450 doopen(&f, KOPEN_WRITE);
1451 if (flags & f_retag) {
1452 if ((k = key_bytag(&f, argv[1])) != 0 && strcmp(k->tag, argv[1]) == 0)
1453 key_settag(&f, k, 0);
1454 }
1455 if ((k = key_bytag(&f, argv[0])) == 0)
1456 die(EXIT_FAILURE, "key `%s' not found", argv[0]);
1457 if ((err = key_settag(&f, k, argv[1])) != 0)
1458 die(EXIT_FAILURE, "bad tag `%s': %s", argv[1], key_strerror(err));
1459 doclose(&f);
1460 return (0);
1461 }
1462
1463 /* --- @cmd_lock@ --- */
1464
1465 static int cmd_lock(int argc, char *argv[])
1466 {
1467 key_file f;
1468 key *k;
1469 key_data *kd;
1470 dstr d = DSTR_INIT;
1471
1472 if (argc != 2)
1473 die(EXIT_FAILURE, "Usage: lock qtag");
1474 doopen(&f, KOPEN_WRITE);
1475 if (key_qtag(&f, argv[1], &d, &k, &kd))
1476 die(EXIT_FAILURE, "key `%s' not found", argv[1]);
1477 if (kd->e == KENC_ENCRYPT && key_punlock(d.buf, kd, kd))
1478 die(EXIT_FAILURE, "couldn't unlock key `%s'", d.buf);
1479 if (key_plock(d.buf, kd, kd))
1480 die(EXIT_FAILURE, "failed to lock key `%s'", d.buf);
1481 f.f |= KF_MODIFIED;
1482 doclose(&f);
1483 return (0);
1484 }
1485
1486 /* --- @cmd_unlock@ --- */
1487
1488 static int cmd_unlock(int argc, char *argv[])
1489 {
1490 key_file f;
1491 key *k;
1492 key_data *kd;
1493 dstr d = DSTR_INIT;
1494
1495 if (argc != 2)
1496 die(EXIT_FAILURE, "Usage: unlock qtag");
1497 doopen(&f, KOPEN_WRITE);
1498 if (key_qtag(&f, argv[1], &d, &k, &kd))
1499 die(EXIT_FAILURE, "key `%s' not found", argv[1]);
1500 if (kd->e != KENC_ENCRYPT)
1501 die(EXIT_FAILURE, "key `%s' is not encrypted", d.buf);
1502 if (kd->e == KENC_ENCRYPT && key_punlock(d.buf, kd, kd))
1503 die(EXIT_FAILURE, "couldn't unlock key `%s'", d.buf);
1504 f.f |= KF_MODIFIED;
1505 doclose(&f);
1506 return (0);
1507 }
1508
1509 /* --- @cmd_extract@ --- */
1510
1511 static int cmd_extract(int argc, char *argv[])
1512 {
1513 key_file f;
1514 key *k;
1515 int i;
1516 int rc = 0;
1517 key_filter kf = { 0, 0 };
1518 FILE *fp;
1519
1520 for (;;) {
1521 static struct option opt[] = {
1522 { "filter", OPTF_ARGREQ, 0, 'f' },
1523 { 0, 0, 0, 0 }
1524 };
1525 int i = mdwopt(argc, argv, "f:", opt, 0, 0, 0);
1526 if (i < 0)
1527 break;
1528 switch (i) {
1529 case 'f': {
1530 char *p;
1531 int err = key_readflags(optarg, &p, &kf.f, &kf.m);
1532 if (err || *p)
1533 die(EXIT_FAILURE, "bad filter string `%s'", optarg);
1534 } break;
1535 default:
1536 rc = 1;
1537 break;
1538 }
1539 }
1540
1541 argv += optind; argc -= optind;
1542 if (rc || argc < 1)
1543 die(EXIT_FAILURE, "Usage: extract [-f filter] file [tag...]");
1544 if (strcmp(*argv, "-") == 0)
1545 fp = stdout;
1546 else if (!(fp = fopen(*argv, "w"))) {
1547 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
1548 *argv, strerror(errno));
1549 }
1550
1551 doopen(&f, KOPEN_READ);
1552 if (argc < 2) {
1553 key_iter i;
1554 key *k;
1555 for (key_mkiter(&i, &f); (k = key_next(&i)) != 0; )
1556 key_extract(&f, k, fp, &kf);
1557 } else {
1558 for (i = 1; i < argc; i++) {
1559 if ((k = key_bytag(&f, argv[i])) != 0)
1560 key_extract(&f, k, fp, &kf);
1561 else {
1562 moan("key `%s' not found", argv[i]);
1563 rc = 1;
1564 }
1565 }
1566 }
1567 if (fclose(fp))
1568 die(EXIT_FAILURE, "error writing file: %s", strerror(errno));
1569 doclose(&f);
1570 return (rc);
1571 }
1572
1573 /* --- @cmd_tidy@ --- */
1574
1575 static int cmd_tidy(int argc, char *argv[])
1576 {
1577 key_file f;
1578 if (argc != 1)
1579 die(EXIT_FAILURE, "usage: tidy");
1580 doopen(&f, KOPEN_WRITE);
1581 f.f |= KF_MODIFIED; /* Nasty hack */
1582 doclose(&f);
1583 return (0);
1584 }
1585
1586 /* --- @cmd_merge@ --- */
1587
1588 static int cmd_merge(int argc, char *argv[])
1589 {
1590 key_file f;
1591 FILE *fp;
1592
1593 if (argc != 2)
1594 die(EXIT_FAILURE, "Usage: merge file");
1595 if (strcmp(argv[1], "-") == 0)
1596 fp = stdin;
1597 else if (!(fp = fopen(argv[1], "r"))) {
1598 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
1599 argv[1], strerror(errno));
1600 }
1601
1602 doopen(&f, KOPEN_WRITE);
1603 key_merge(&f, argv[1], fp, key_moan, 0);
1604 doclose(&f);
1605 return (0);
1606 }
1607
1608 /*----- Main command table ------------------------------------------------*/
1609
1610 static struct cmd {
1611 const char *name;
1612 int (*cmd)(int /*argc*/, char */*argv*/[]);
1613 const char *usage;
1614 const char *help;
1615 } cmds[] = {
1616 { "add", cmd_add,
1617 "add [options] type [attr...]\n\
1618 Options: [-lqrLS] [-a alg] [-bB bits] [-p param] [-R tag]\n\
1619 [-e expire] [-t tag] [-c comment]", "\
1620 Options:\n\
1621 \n\
1622 -a, --algorithm=ALG Generate keys suitable for ALG.\n\
1623 -b, --bits=N Generate an N-bit key.\n\
1624 -B, --qbits=N Use an N-bit subgroup or factors.\n\
1625 -p, --parameters=TAG Get group parameters from TAG.\n\
1626 -e, --expire=TIME Make the key expire after TIME.\n\
1627 -c, --comment=STRING Attach the command STRING to the key.\n\
1628 -t, --tag=TAG Tag the key with the name TAG.\n\
1629 -r, --retag Untag any key currently with that tag.\n\
1630 -R, --rand-id=TAG Use key named TAG for the random number generator.\n\
1631 -l, --lock Lock the generated key with a passphrase.\n\
1632 -q, --quiet Don't give progress indicators while working.\n\
1633 -L, --lim-lee Generate Lim-Lee primes for Diffie-Hellman groups.\n\
1634 -S, --subgroup Use a prime-order subgroup for Diffie-Hellman.\n\
1635 " },
1636 { "expire", cmd_expire, "expire tag..." },
1637 { "delete", cmd_delete, "delete tag..." },
1638 { "tag", cmd_tag, "tag [-r] tag [new-tag]", "\
1639 Options:\n\
1640 \n\
1641 -r, --retag Untag any key currently called new-tag.\n\
1642 " },
1643 { "setattr", cmd_setattr, "setattr tag attr..." },
1644 { "comment", cmd_comment, "comment tag [comment]" },
1645 { "lock", cmd_lock, "lock qtag" },
1646 { "unlock", cmd_unlock, "unlock qtag" },
1647 { "list", cmd_list, "list [-uqv] [-f filter] [tag...]", "\
1648 Options:\n\
1649 \n\
1650 -u, --utc Display expiry times etc. in UTC, not local time.\n\
1651 -q, --quiet Show less information.\n\
1652 -v, --verbose Show more information.\n\
1653 " },
1654 { "fingerprint", cmd_finger, "fingerprint [-f filter] [tag...]", "\
1655 Options:\n\
1656 \n\
1657 -f, --filter=FILT Only hash key components matching FILT.\n\
1658 " },
1659 { "tidy", cmd_tidy, "tidy" },
1660 { "extract", cmd_extract, "extract [-f filter] file [tag...]", "\
1661 Options:\n\
1662 \n\
1663 -f, --filter=FILT Only extract key components matching FILT.\n\
1664 " },
1665 { "merge", cmd_merge, "merge file" },
1666 { 0, 0, 0 }
1667 };
1668
1669 typedef struct cmd cmd;
1670
1671 /*----- Main code ---------------------------------------------------------*/
1672
1673 /* --- @findcmd@ --- *
1674 *
1675 * Arguments: @const char *name@ = a command name
1676 *
1677 * Returns: Pointer to the command structure.
1678 *
1679 * Use: Looks up a command by name. If the command isn't found, an
1680 * error is reported and the program is terminated.
1681 */
1682
1683 static cmd *findcmd(const char *name)
1684 {
1685 cmd *c, *chosen = 0;
1686 size_t sz = strlen(name);
1687
1688 for (c = cmds; c->name; c++) {
1689 if (strncmp(name, c->name, sz) == 0) {
1690 if (c->name[sz] == 0) {
1691 chosen = c;
1692 break;
1693 } else if (chosen)
1694 die(EXIT_FAILURE, "ambiguous command name `%s'", name);
1695 else
1696 chosen = c;
1697 }
1698 }
1699 if (!chosen)
1700 die(EXIT_FAILURE, "unknown command name `%s'", name);
1701 return (chosen);
1702 }
1703
1704 /* --- Helpful GNUy functions --- */
1705
1706 void usage(FILE *fp)
1707 {
1708 pquis(fp, "Usage: $ [-k keyring] command [args]\n");
1709 }
1710
1711 void version(FILE *fp)
1712 {
1713 pquis(fp, "$, Catacomb version " VERSION "\n");
1714 }
1715
1716 void help(FILE *fp, char **argv)
1717 {
1718 cmd *c;
1719
1720 version(fp);
1721 fputc('\n', fp);
1722 if (*argv) {
1723 c = findcmd(*argv);
1724 fprintf(fp, "Usage: %s [-k keyring] %s\n", QUIS, c->usage);
1725 if (c->help) {
1726 fputc('\n', fp);
1727 fputs(c->help, fp);
1728 }
1729 } else {
1730 usage(fp);
1731 fputs("\n\
1732 Performs various simple key management operations. Command line options\n\
1733 recognized are:\n\
1734 \n\
1735 -h, --help [COMMAND] Display this help text (or help for COMMAND).\n\
1736 -v, --version Display version number.\n\
1737 -u, --usage Display short usage summary.\n\
1738 \n\
1739 -k, --keyring=FILE Read and write keys in FILE.\n\
1740 -i, --id=TAG Use key TAG for random number generator.\n\
1741 -t, --type=TYPE Use key TYPE for random number generator.\n\
1742 \n\
1743 The following commands are understood:\n\n",
1744 fp);
1745 for (c = cmds; c->name; c++)
1746 fprintf(fp, "%s\n", c->usage);
1747 }
1748 }
1749
1750 /* --- @main@ --- *
1751 *
1752 * Arguments: @int argc@ = number of command line arguments
1753 * @char *argv[]@ = array of command line arguments
1754 *
1755 * Returns: Nonzero on failure.
1756 *
1757 * Use: Main program. Performs simple key management functions.
1758 */
1759
1760 int main(int argc, char *argv[])
1761 {
1762 unsigned f = 0;
1763
1764 #define f_bogus 1u
1765
1766 /* --- Initialization --- */
1767
1768 ego(argv[0]);
1769 sub_init();
1770
1771 /* --- Parse command line options --- */
1772
1773 for (;;) {
1774 static struct option opt[] = {
1775
1776 /* --- Standard GNUy help options --- */
1777
1778 { "help", 0, 0, 'h' },
1779 { "version", 0, 0, 'v' },
1780 { "usage", 0, 0, 'u' },
1781
1782 /* --- Real live useful options --- */
1783
1784 { "keyring", OPTF_ARGREQ, 0, 'k' },
1785
1786 /* --- Magic terminator --- */
1787
1788 { 0, 0, 0, 0 }
1789 };
1790 int i = mdwopt(argc, argv, "+hvu k:", opt, 0, 0, 0);
1791
1792 if (i < 0)
1793 break;
1794 switch (i) {
1795
1796 /* --- GNU help options --- */
1797
1798 case 'h':
1799 help(stdout, argv + optind);
1800 exit(0);
1801 case 'v':
1802 version(stdout);
1803 exit(0);
1804 case 'u':
1805 usage(stdout);
1806 exit(0);
1807
1808 /* --- Real useful options --- */
1809
1810 case 'k':
1811 keyfile = optarg;
1812 break;
1813
1814 /* --- Bogosity --- */
1815
1816 default:
1817 f |= f_bogus;
1818 break;
1819 }
1820 }
1821
1822 /* --- Complain about excessive bogons --- */
1823
1824 if (f & f_bogus || optind == argc) {
1825 usage(stderr);
1826 exit(1);
1827 }
1828
1829 /* --- Initialize the Catacomb random number generator --- */
1830
1831 rand_noisesrc(RAND_GLOBAL, &noise_source);
1832 rand_seed(RAND_GLOBAL, 160);
1833
1834 /* --- Dispatch to appropriate command handler --- */
1835
1836 argc -= optind;
1837 argv += optind;
1838 optind = 0;
1839 return (findcmd(argv[0])->cmd(argc, argv));
1840 }
1841
1842 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library (downstream of http://git.distorted.org.uk/~mdw/catacomb/)