fa54fe1e |
1 | /* -*-c-*- |
2 | * |
3 | * $Id$ |
4 | * |
5 | * Sign files |
6 | * |
7 | * (c) 2005 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 | /*----- Header files ------------------------------------------------------*/ |
31 | |
32 | #include "config.h" |
33 | |
34 | #include <ctype.h> |
35 | #include <errno.h> |
36 | #include <stdio.h> |
37 | #include <stdlib.h> |
38 | #include <string.h> |
39 | #include <time.h> |
40 | |
41 | #include <mLib/base64.h> |
42 | #include <mLib/dstr.h> |
43 | #include <mLib/mdwopt.h> |
44 | #include <mLib/quis.h> |
45 | #include <mLib/report.h> |
46 | #include <mLib/sub.h> |
47 | |
48 | #include "buf.h" |
49 | #include "rand.h" |
50 | #include "noise.h" |
51 | #include "mprand.h" |
52 | #include "key.h" |
53 | #include "cc.h" |
54 | |
55 | #include "ectab.h" |
56 | #include "ptab.h" |
57 | |
58 | /*----- Utilities ---------------------------------------------------------*/ |
59 | |
60 | /* --- @keyreport@ --- * |
61 | * |
62 | * Arguments: @const char *file@ = filename containing the error |
63 | * @int line@ = line number in file |
64 | * @const char *err@ = error text message |
65 | * @void *p@ = unimportant pointer |
66 | * |
67 | * Returns: --- |
68 | * |
69 | * Use: Reports errors during the opening of a key file. |
70 | */ |
71 | |
72 | static void keyreport(const char *file, int line, const char *err, void *p) |
73 | { |
74 | moan("error in keyring `%s' at line `%s': %s", file, line, err); |
75 | } |
76 | |
77 | /*----- Static variables --------------------------------------------------*/ |
78 | |
79 | static const char *keyring = "keyring"; |
80 | |
81 | /*----- Data formats ------------------------------------------------------* |
82 | * |
83 | * Our crypto stuff is split into three parts: a header describing the key, |
84 | * the message itself, and the signature. In a detached signature, the |
85 | * message is separate, and the header and signature are combined into one |
86 | * encoded chunk. In an attached signature, the message is included. There |
87 | * are two forms of message: binary and text. Binary messages are divided |
88 | * into chunks, each preceded by a 2-octet length, and terminated by a |
89 | * zero-length chunk. Text messages are byte-stuffed, as for RFC821, and |
90 | * trailing whitespace before a newline is ignored. |
91 | */ |
92 | |
93 | typedef struct sigmsg { |
94 | unsigned f; /* Flags */ |
95 | #define F_DETACH 1u |
96 | #define F_BINARY 2u |
97 | #define F_SIGMASK 3u |
98 | #define F_HASHMASK (F_BINARY) |
99 | uint32 keyid; /* Key identifier */ |
100 | time_t t; /* When the signature was made */ |
101 | dstr kh; /* Key fingerprint (sanity check) */ |
102 | dstr sig; /* Signature */ |
103 | sig *s; /* Signature algorithm */ |
104 | } sigmsg; |
105 | |
106 | #define F_MIDLINE 16u |
107 | #define F_EOF 32u |
108 | #define F_NOCLOSE 64u |
109 | #define F_BOGUS 128u |
110 | #define F_BUFFER 256u |
111 | #define F_UTC 512u |
112 | |
113 | /*----- Chunk I/O ---------------------------------------------------------*/ |
114 | |
115 | static void chunk_write(enc *e, const void *p, size_t n) |
116 | { |
117 | octet b[2]; |
118 | |
119 | assert(n <= 0xffff); |
120 | STORE16(b, n); |
121 | if (e->ops->write(e, b, 2) || e->ops->write(e, p, n)) |
122 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
123 | } |
124 | |
125 | static size_t chunk_read(enc *e, void *p) |
126 | { |
127 | octet b[2]; |
128 | size_t n; |
129 | |
130 | if (e->ops->read(e, b, 2) != 2) |
131 | goto err; |
132 | n = LOAD16(b); |
133 | if (n && e->ops->read(e, p, n) != n) |
134 | goto err; |
135 | return (n); |
136 | |
137 | err: |
138 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); |
139 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
140 | return (0); |
141 | } |
142 | |
143 | /*----- Message canonification --------------------------------------------*/ |
144 | |
145 | #define MSGBUFSZ 65536 |
146 | #define MSGBUFTHRESH 32768 |
147 | |
148 | typedef struct msgcanon { |
149 | unsigned f; |
150 | FILE *fp; |
151 | enc *e; |
152 | size_t (*read)(struct msgcanon *, void *); |
153 | void (*write)(struct msgcanon *, const void *, size_t); |
154 | void (*close)(struct msgcanon *); |
155 | } msgcanon; |
156 | |
157 | #define MC_INIT { 0 } |
158 | |
159 | static size_t textread(msgcanon *m, void *bp) |
160 | { |
161 | size_t n = 0, nsp = 0; |
162 | int ch; |
163 | char *b = bp; |
164 | unsigned f = m->f; |
165 | |
166 | if (f & F_EOF) return (0); |
167 | for (;;) { |
168 | if ((ch = getc(m->fp)) == EOF) goto eof; |
169 | if (!(f & (F_DETACH | F_MIDLINE)) && ch == '.') { |
170 | ch = getc(m->fp); |
171 | if (ch == '\n') goto eof; |
172 | } |
173 | if (ch == '\n') { |
174 | n -= nsp; nsp = 0; |
175 | if (n >= MSGBUFTHRESH) goto full; |
176 | b[n++] = ch; |
177 | f &= ~F_MIDLINE; |
178 | } else if (isspace(ch)) { |
179 | f |= F_MIDLINE; |
180 | if (n >= MSGBUFSZ) goto full; |
181 | b[n++] = ch; nsp++; |
182 | } else { |
183 | f |= F_MIDLINE; |
184 | nsp = 0; |
185 | if (n >= MSGBUFTHRESH) goto full; |
186 | b[n++] = ch; |
187 | } |
188 | } |
189 | eof: |
190 | f |= F_EOF; |
191 | goto done; |
192 | full: |
193 | ungetc(ch, m->fp); |
194 | done: |
195 | m->f = f; |
196 | return (n); |
197 | } |
198 | |
199 | static void textwrite(msgcanon *m, const void *bp, size_t n) |
200 | { |
201 | const char *p = bp, *l = p + n; |
202 | unsigned f = m->f; |
203 | |
204 | while (p < l) { |
205 | if (!(f & (F_MIDLINE | F_DETACH)) && |
206 | (*p == '.' || *p == '-')) |
207 | putc('.', m->fp); |
208 | if (*p == '\n') f &= ~F_MIDLINE; |
209 | else f |= F_MIDLINE; |
210 | putc(*p, m->fp); |
211 | p++; |
212 | } |
213 | m->f = f; |
214 | } |
215 | |
216 | static size_t binreadembed(msgcanon *m, void *bp) |
217 | { return (chunk_read(m->e, bp)); } |
218 | static size_t binreaddetach(msgcanon *m, void *bp) |
219 | { return (fread(bp, 1, MSGBUFSZ, m->fp)); } |
220 | |
221 | static void binwriteembed(msgcanon *m, const void *bp, size_t n) |
222 | { chunk_write(m->e, bp, n); } |
223 | |
224 | static void nullwrite(msgcanon *m, const void *bp, size_t n) { ; } |
225 | |
226 | static void mcsetup_readfile(msgcanon *m, unsigned f, const char *fn) |
227 | { |
228 | m->f = F_DETACH | (f & F_BINARY); |
229 | if (!fn || strcmp(fn, "-") == 0) { |
230 | m->fp = stdin; |
231 | m->f |= F_NOCLOSE; |
232 | } else if ((m->fp = fopen(fn, (f & F_BINARY) ? "rb" : "r")) == 0) |
233 | die(EXIT_FAILURE, "couldn't open file `%s': %s", fn, strerror(errno)); |
234 | m->read = (f & F_BINARY) ? binreaddetach : textread; |
235 | } |
236 | |
237 | static void mcsetup_writenull(msgcanon *m) { m->write = nullwrite; } |
238 | |
239 | static void mcsetup_read(msgcanon *m, unsigned f, enc **ee, const char *dfn) |
240 | { |
241 | enc *e = *ee; |
242 | |
243 | m->f = f | F_NOCLOSE; |
244 | |
245 | if (dfn && !(f & F_DETACH)) die(EXIT_FAILURE, "signature is not detached"); |
246 | if (f & F_BINARY) { |
247 | if (!(f & F_DETACH)) { |
248 | m->e = e; |
249 | *ee = 0; |
250 | m->fp = e->fp; |
251 | m->read = binreadembed; |
252 | } else { |
253 | m->read = binreaddetach; |
254 | if (!dfn || strcmp(dfn, "-") == 0) |
255 | m->fp = stdin; |
256 | else if ((m->fp = fopen(dfn, "rb")) == 0) |
257 | die(EXIT_FAILURE, "can't open `%s': %s", dfn, strerror(errno)); |
258 | else |
259 | m->f &= ~F_NOCLOSE; |
260 | } |
261 | } else { |
262 | m->read = textread; |
263 | if (!(f & F_DETACH)) { |
264 | if (e->ops->decdone(e) || ferror(e->fp)) |
265 | die(EXIT_FAILURE, "error at end of signature header"); |
266 | m->fp = e->fp; |
267 | e->ops->destroy(e); |
268 | *ee = 0; |
269 | } else if (!dfn || strcmp(dfn, "-") == 0) |
270 | m->fp = stdin; |
271 | else if ((m->fp = fopen(dfn, "r")) == 0) |
272 | die(EXIT_FAILURE, "can't read file `%s': %s", dfn, strerror(errno)); |
273 | else |
274 | m->f &= ~F_NOCLOSE; |
275 | } |
276 | } |
277 | |
278 | static void mcsetup_write(msgcanon *m, unsigned f, enc **ee) |
279 | { |
280 | enc *e = *ee; |
281 | |
282 | m->f = f | F_NOCLOSE; |
283 | |
284 | if (f & F_DETACH) |
285 | m->write = nullwrite; |
286 | else if (f & F_BINARY) { |
287 | m->e = e; |
288 | *ee = 0; |
289 | m->fp = e->fp; |
290 | m->write = binwriteembed; |
291 | } else { |
292 | if (e->ops->encdone(e) || ferror(e->fp)) |
293 | die(EXIT_FAILURE, "error at end of signature header"); |
294 | m->fp = e->fp; |
295 | e->ops->destroy(e); |
296 | *ee = 0; |
297 | m->write = textwrite; |
298 | } |
299 | } |
300 | |
301 | static void mc_endread(msgcanon *m, const encops *eops, enc **ee) |
302 | { |
303 | if (!(m->f & F_DETACH)) { |
304 | if (m->f & F_BINARY) |
305 | *ee = m->e; |
306 | else |
307 | *ee = initdec(eops, m->fp, checkbdry, "CATSIGN SIGNATURE"); |
308 | } |
309 | if (m->fp && !(m->f & F_NOCLOSE)) { |
310 | if (ferror(m->fp) || fclose(m->fp)) |
311 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
312 | } |
313 | } |
314 | |
315 | static void mc_endwrite(msgcanon *m, const encops *eops, enc **ee) |
316 | { |
317 | if (!(m->f & F_BINARY)) { |
318 | if (m->f & F_MIDLINE) putc('\n', m->fp); |
319 | if (!(m->f & F_DETACH)) { |
320 | putc('.', m->fp); putc('\n', m->fp); |
321 | *ee = initenc(eops, m->fp, "CATSIGN SIGNATURE"); |
322 | } |
323 | } else if (!(m->f & F_DETACH)) { |
324 | chunk_write(m->e, 0, 0); |
325 | *ee = m->e; |
326 | } |
327 | if (m->fp && !(m->f & F_NOCLOSE)) { |
328 | if (fflush(m->fp) || ferror(m->fp) || fclose(m->fp)) |
329 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
330 | } |
331 | } |
332 | |
333 | /*----- Signature reading and writing -------------------------------------*/ |
334 | |
335 | static void sig_init(sigmsg *s, unsigned f, uint32 keyid) |
336 | { |
337 | s->f = f & F_SIGMASK; |
338 | s->keyid = keyid; |
339 | time(&s->t); |
340 | s->s = 0; |
341 | dstr_create(&s->kh); |
342 | dstr_create(&s->sig); |
343 | } |
344 | |
345 | static void sig_destroy(sigmsg *s) |
346 | { |
347 | dstr_destroy(&s->kh); |
348 | dstr_destroy(&s->sig); |
349 | if (s->s) freesig(s->s); |
350 | } |
351 | |
352 | static void sigtobuffer(sigmsg *s, buf *b, int hashp) |
353 | { |
354 | kludge64 t; |
355 | |
356 | ASSIGN64(t, s->t); |
357 | if (hashp) buf_putu16(b, s->f & F_HASHMASK); |
358 | else buf_putu16(b, s->f & F_SIGMASK); |
359 | buf_putu32(b, s->keyid); |
360 | buf_putu32(b, HI64(t)); |
361 | buf_putu32(b, LO64(t)); |
362 | buf_putstr16(b, &s->kh); |
363 | assert(BOK(b)); |
364 | } |
365 | |
366 | static void dohash(ghash *h, const void *p, size_t n) |
367 | { |
368 | /* trace_block(1, "hashing", p, n); */ |
369 | GH_HASH(h, p, n); |
370 | } |
371 | |
372 | static void sig_hash(sigmsg *s) |
373 | { |
374 | octet bb[16384]; |
375 | buf b; |
376 | |
377 | buf_init(&b, bb, sizeof(bb)); |
378 | sigtobuffer(s, &b, 1); |
379 | dohash(s->s->h, BBASE(&b), BLEN(&b)); |
380 | } |
381 | |
382 | static void keyhash(key *k, sig *s, dstr *d) |
383 | { |
384 | ghash *h; |
385 | key_filter kf; |
386 | |
387 | h = GH_INIT(GH_CLASS(s->h)); |
388 | kf.f = KCAT_PUB; |
389 | kf.m = KF_CATMASK; |
390 | key_fingerprint(k, h, &kf); |
391 | dstr_ensure(d, GH_CLASS(h)->hashsz); |
392 | GH_DONE(h, d->buf + d->len); |
393 | d->len += GH_CLASS(h)->hashsz; |
394 | GH_DESTROY(h); |
395 | } |
396 | |
397 | static void sig_writeheader(enc *e, sigmsg *s) |
398 | { |
399 | octet bb[16384]; |
400 | buf b; |
401 | |
402 | buf_init(&b, bb, sizeof(bb)); |
403 | sigtobuffer(s, &b, 0); |
404 | chunk_write(e, BBASE(&b), BLEN(&b)); |
405 | } |
406 | |
407 | static void sig_writesig(enc *e, sigmsg *s) |
408 | { chunk_write(e, s->sig.buf, s->sig.len); } |
409 | |
410 | static void diechoke(const char *m, void *p) |
411 | { die(EXIT_FAILURE, "%s%s%s", p, p ? ": " : "", m); } |
412 | |
413 | static void sig_readheader(enc *e, sigmsg *s, |
414 | void (*choke)(const char *, void *), void *p) |
415 | { |
416 | uint16 f; |
417 | octet bb[MSGBUFSZ]; |
418 | uint32 x, y; |
419 | kludge64 t; |
420 | buf b; |
421 | size_t n; |
422 | |
423 | n = chunk_read(e, bb); |
424 | buf_init(&b, bb, n); |
425 | if (buf_getu16(&b, &f)) choke("missing flags", p); |
426 | if (buf_getu32(&b, &x)) choke("missing keyid", p); |
427 | sig_init(s, f, x); |
428 | if (buf_getu32(&b, &x) || buf_getu32(&b, &y)) |
429 | choke("missing datestamp", p); |
430 | SET64(t, x, y); s->t = GET64(time_t, t); |
431 | if (buf_getstr16(&b, &s->kh)) |
432 | choke("missing key hash", p); |
433 | if (BLEFT(&b)) |
434 | choke("junk at end", p); |
435 | } |
436 | |
437 | static void sig_readsig(enc *e, sigmsg *s) |
438 | { |
439 | octet bb[MSGBUFSZ]; |
440 | size_t n; |
441 | |
442 | n = chunk_read(e, bb); |
443 | dstr_putm(&s->sig, bb, n); |
444 | } |
445 | |
446 | /*----- Signing -----------------------------------------------------------*/ |
447 | |
448 | static int sign(int argc, char *argv[]) |
449 | { |
450 | const char *ef = "binary", *fn = 0, *of = 0, *kn = "ccsig", *err; |
451 | unsigned f = 0; |
452 | key_file kf; |
453 | key *k; |
454 | sigmsg s; |
455 | FILE *ofp = 0; |
456 | int i; |
457 | char bb[MSGBUFSZ]; |
458 | size_t n; |
459 | dstr d = DSTR_INIT; |
460 | const encops *eo; |
461 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
462 | enc *e; |
463 | |
464 | for (;;) { |
465 | static const struct option opt[] = { |
466 | { "armour", 0, 0, 'a' }, |
467 | { "armor", 0, 0, 'a' }, |
468 | { "binary", 0, 0, 'b' }, |
469 | { "detach", 0, 0, 'd' }, |
470 | { "key", OPTF_ARGREQ, 0, 'k' }, |
471 | { "format", OPTF_ARGREQ, 0, 'f' }, |
472 | { "output", OPTF_ARGREQ, 0, 'o' }, |
473 | { "text", 0, 0, 't' }, |
474 | { 0, 0, 0, 0 } |
475 | }; |
476 | i = mdwopt(argc, argv, "k:f:o:abdt", opt, 0, 0, 0); |
477 | if (i < 0) break; |
478 | switch (i) { |
479 | case 'k': kn = optarg; break; |
480 | case 'f': ef = optarg; break; |
481 | case 'o': of = optarg; break; |
482 | case 'a': ef = "pem"; break; |
483 | case 't': f &= ~F_BINARY; break; |
484 | case 'b': f |= F_BINARY; break; |
485 | case 'd': f |= F_DETACH; break; |
486 | default: f |= F_BOGUS; break; |
487 | } |
488 | } |
489 | if (argc - optind > 1 || (f & F_BOGUS)) |
490 | die(EXIT_FAILURE, "Usage: sign [-OPTIONS] [FILE]"); |
491 | |
492 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
493 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
494 | if ((k = key_bytag(&kf, kn)) == 0) |
495 | die(EXIT_FAILURE, "key `%s' not found", kn); |
496 | |
497 | if ((eo = getenc(ef)) == 0) |
498 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
499 | |
500 | fn = (optind >= argc) ? 0 : argv[optind++]; |
501 | |
502 | if (!of || strcmp(of, "-") == 0) |
503 | ofp = stdout; |
504 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
505 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
506 | ofp, strerror(errno)); |
507 | } |
508 | |
509 | /* --- Start the work --- */ |
510 | |
511 | sig_init(&s, f, k->id); |
512 | dstr_reset(&d); |
513 | key_fulltag(k, &d); |
514 | s.s = getsig(k, "ccsig", 1); |
515 | if ((err = s.s->ops->check(s.s)) != 0) |
516 | moan("key %s fails check: %s", d.buf, err); |
517 | keyhash(k, s.s, &s.kh); |
518 | e = initenc(eo, ofp, |
519 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
520 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
521 | "CATSIGN MESSAGE HEADER"); |
522 | sig_writeheader(e, &s); |
523 | |
524 | /* --- Hash the message --- */ |
525 | |
526 | mcsetup_readfile(&mc_in, f, fn); |
527 | mcsetup_write(&mc_out, f, &e); |
528 | sig_hash(&s); |
529 | for (;;) { |
530 | n = mc_in.read(&mc_in, bb); |
531 | if (!n) break; |
532 | dohash(s.s->h, bb, n); |
533 | mc_out.write(&mc_out, bb, n); |
534 | } |
535 | mc_endread(&mc_in, 0, 0); |
536 | mc_endwrite(&mc_out, eo, &e); |
537 | |
538 | /* --- Write the signature --- */ |
539 | |
540 | if (s.s->ops->doit(s.s, &s.sig)) |
541 | die(EXIT_FAILURE, "signature failed"); |
542 | sig_writesig(e, &s); |
543 | e->ops->encdone(e); |
544 | if (fflush(ofp) || ferror(ofp) || fclose(ofp)) |
545 | die(EXIT_FAILURE, "error writing signature: %s", strerror(errno)); |
546 | |
547 | /* --- All done --- */ |
548 | |
549 | freeenc(e); |
550 | key_close(&kf); |
551 | sig_destroy(&s); |
552 | dstr_destroy(&d); |
553 | return (0); |
554 | } |
555 | |
556 | /*----- Verifying ---------------------------------------------------------*/ |
557 | |
558 | typedef struct vrfctx { |
559 | unsigned f, m; |
560 | int verb; |
561 | const char *what; |
562 | } vrfctx; |
563 | |
564 | static int vrfbdry(const char *b, void *p) |
565 | { |
566 | vrfctx *v = p; |
567 | |
568 | if (strcmp(b, "CATSIGN MESSAGE") == 0) { |
569 | v->f |= F_BINARY; |
570 | v->m |= F_BINARY | F_DETACH; |
571 | return (1); |
572 | } else if (strcmp(b, "CATSIGN MESSAGE HEADER") == 0) { |
573 | v->m |= F_BINARY | F_DETACH; |
574 | return (1); |
575 | } else if (strcmp(b, "CATSIGN SIGNATURE") == 0) { |
576 | v->f |= F_DETACH; |
577 | v->m |= F_DETACH; |
578 | return (1); |
579 | } else |
580 | return (0); |
581 | } |
582 | |
583 | static void vrfchoke(const char *m, void *p) |
584 | { |
585 | vrfctx *v = p; |
586 | if (v->verb) printf("FAIL %s: %s\n", v->what, m); |
587 | exit(EXIT_FAILURE); |
588 | } |
589 | |
590 | static int verify(int argc, char *argv[]) |
591 | { |
592 | const char *ef = "binary", *of = 0, *dfn = 0, *kn = 0, *err; |
593 | vrfctx v = { 0, 0, 1 }; |
594 | key_file kf; |
595 | key *k, *kk = 0; |
596 | sigmsg s; |
597 | FILE *fp, *ofp = 0, *rfp = 0; |
598 | struct tm *tm; |
599 | int i; |
600 | char bb[MSGBUFSZ]; |
601 | size_t n; |
602 | dstr d = DSTR_INIT, dd = DSTR_INIT; |
603 | const encops *eo; |
604 | msgcanon mc_in = MC_INIT; |
605 | enc *e; |
606 | |
607 | for (;;) { |
608 | static const struct option opt[] = { |
609 | { "armour", 0, 0, 'a' }, |
610 | { "armor", 0, 0, 'a' }, |
611 | { "buffer", 0, 0, 'b' }, |
612 | { "key", OPTF_ARGREQ, 0, 'k' }, |
613 | { "format", OPTF_ARGREQ, 0, 'f' }, |
614 | { "output", OPTF_ARGREQ, 0, 'o' }, |
615 | { "quiet", 0, 0, 'q' }, |
616 | { "utc", 0, 0, 'u' }, |
617 | { "gmt", 0, 0, 'u' }, |
618 | { "verbose", 0, 0, 'v' }, |
619 | { 0, 0, 0, 0 } |
620 | }; |
621 | i = mdwopt(argc, argv, "k:f:o:abquv", opt, 0, 0, 0); |
622 | if (i < 0) break; |
623 | switch (i) { |
624 | case 'a': ef = "pem"; break; |
625 | case 'b': v.f |= F_BUFFER; break; |
626 | case 'k': kn = optarg; break; |
627 | case 'f': ef = optarg; break; |
628 | case 'o': of = optarg; break; |
629 | case 'u': v.f |= F_UTC; break; |
630 | case 'q': if (v.verb > 0) v.verb--; break; |
631 | case 'v': if (v.verb < 10) v.verb++; break; |
632 | default: v.f |= F_BOGUS; break; |
633 | } |
634 | } |
635 | if (argc - optind > 2 || (v.f & F_BOGUS)) |
636 | die(EXIT_FAILURE, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]"); |
637 | |
638 | if ((eo = getenc(ef)) == 0) |
639 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
640 | |
641 | if (optind >= argc) |
642 | fp = stdin; |
643 | else if (strcmp(argv[optind], "-") == 0) { |
644 | fp = stdin; |
645 | optind++; |
646 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
647 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
648 | argv[optind], strerror(errno)); |
649 | } else |
650 | optind++; |
651 | |
652 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
653 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
654 | if (kn && (kk = key_bytag(&kf, kn)) == 0) |
655 | die(EXIT_FAILURE, "key `%s' not found", kn); |
656 | |
657 | e = initdec(eo, fp, vrfbdry, &v); |
658 | |
659 | /* --- Read the header chunk --- */ |
660 | |
661 | v.what = "malformed header"; |
662 | sig_readheader(e, &s, vrfchoke, &v); |
663 | |
664 | if (((s.f ^ v.f) & v.m) != 0) { |
665 | if (v.verb) printf("FAIL boundary string inconsistent with contents\n"); |
666 | exit(EXIT_FAILURE); |
667 | } |
668 | v.f |= s.f; |
669 | |
670 | if ((k = key_byid(&kf, s.keyid)) == 0) { |
671 | if (v.verb) printf("FAIL key id %08lx not found\n", |
672 | (unsigned long)s.keyid); |
673 | exit(EXIT_FAILURE); |
674 | } |
675 | if (kk && k->id != kk->id) { |
676 | if (v.verb) { |
677 | dstr_reset(&d); key_fulltag(k, &d); |
678 | dstr_reset(&dd); key_fulltag(kk, &dd); |
679 | printf("FAIL signing key is %s; expected key %s\n", d.buf, dd.buf); |
680 | } |
681 | exit(EXIT_FAILURE); |
682 | } |
683 | |
684 | s.s = getsig(k, "ccsig", 0); |
685 | dstr_reset(&d); key_fulltag(k, &d); |
686 | if (v.verb && (err = s.s->ops->check(s.s)) != 0) |
687 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
688 | |
689 | dstr_reset(&dd); keyhash(k, s.s, &dd); |
690 | if (dd.len != s.kh.len || memcmp(dd.buf, s.kh.buf, dd.len) != 0) { |
691 | if (v.verb) printf("FAIL key hash mismatch\n"); |
692 | exit(EXIT_FAILURE); |
693 | } |
694 | |
695 | /* --- Now a merry dance --- */ |
696 | |
697 | if (v.f & F_DETACH) |
698 | sig_readsig(e, &s); |
699 | if (optind < argc) |
700 | dfn = argv[optind++]; |
701 | mcsetup_read(&mc_in, v.f, &e, dfn); |
702 | |
703 | if (!of && (v.f & F_DETACH)) { |
704 | rfp = ofp = 0; |
705 | v.f &= ~F_BUFFER; |
706 | } else if (!of || strcmp(of, "-") == 0) { |
707 | v.f |= F_BUFFER; |
708 | ofp = stdout; |
709 | } |
710 | if (of && !(v.f & F_BUFFER)) { |
711 | if ((ofp = fopen(of, (v.f & F_BINARY) ? "wb" : "w")) == 0) { |
712 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
713 | of, strerror(errno)); |
714 | } |
715 | rfp = ofp; |
716 | } else if ((rfp = tmpfile()) == 0) |
717 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); |
718 | |
719 | /* --- Read the message and verify the signature --- */ |
720 | |
721 | sig_hash(&s); |
722 | for (;;) { |
723 | n = mc_in.read(&mc_in, bb); |
724 | if (!n) break; |
725 | dohash(s.s->h, bb, n); |
726 | if (rfp) fwrite(bb, 1, n, rfp); |
727 | } |
728 | mc_endread(&mc_in, eo, &e); |
729 | if (!(v.f & F_DETACH)) |
730 | sig_readsig(e, &s); |
731 | if (rfp && (ferror(rfp) || fflush(rfp))) { |
732 | if (v.verb) printf("FAIL error writing message: %s\n", strerror(errno)); |
733 | exit(EXIT_FAILURE); |
734 | } |
735 | |
736 | /* --- Check the signature --- */ |
737 | |
738 | if (s.s->ops->doit(s.s, &s.sig)) { |
739 | if (v.verb) printf("FAIL signature verification failed\n"); |
740 | exit(EXIT_FAILURE); |
741 | } |
742 | if (v.verb) { |
743 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
744 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
745 | printf("INFO good-signature %s\n", d.buf); |
746 | printf("INFO date %s\n", bb); |
747 | } |
748 | |
749 | /* --- Unbuffer buffered input --- */ |
750 | |
751 | if (v.f & F_BUFFER) { |
752 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { |
753 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
754 | of, strerror(errno)); |
755 | } |
756 | rewind(rfp); |
757 | if (v.verb && ofp == stdout) printf("DATA\n"); |
758 | for (;;) { |
759 | n = fread(bb, 1, sizeof(bb), rfp); |
760 | if (!n) break; |
761 | if (fwrite(bb, 1, n, ofp) < n) |
762 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
763 | } |
764 | if (ferror(rfp) || fclose(rfp)) |
765 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); |
766 | } |
767 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
768 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
769 | |
770 | /* --- Tidy up --- */ |
771 | |
772 | e->ops->decdone(e); |
773 | if (v.verb && ofp != stdout) |
774 | printf("OK verified successfully\n"); |
775 | freeenc(e); |
776 | key_close(&kf); |
777 | sig_destroy(&s); |
778 | dstr_destroy(&d); |
779 | dstr_destroy(&dd); |
780 | return (0); |
781 | } |
782 | |
783 | /*----- Reformatting ------------------------------------------------------*/ |
784 | |
785 | static int format(int argc, char *argv[]) |
786 | { |
787 | const char *ief = "binary", *oef = "binary"; |
788 | const char *dfn = 0, *of = 0, *mf = 0; |
789 | sigmsg s; |
790 | FILE *fp, *ofp = 0, *mfp = 0; |
791 | int i; |
792 | size_t n; |
793 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
794 | char bb[MSGBUFSZ]; |
795 | vrfctx v = { 0, 0, 1 }; |
796 | unsigned f = 0, fm = ~F_SIGMASK, sf; |
797 | const encops *ieo, *oeo; |
798 | enc *ie, *oe; |
799 | |
800 | for (;;) { |
801 | static const struct option opt[] = { |
802 | { "armour-in", 0, 0, 'a' }, |
803 | { "armor-in", 0, 0, 'a' }, |
804 | { "armour-out", 0, 0, 'A' }, |
805 | { "armor-out", 0, 0, 'A' }, |
806 | { "detach", 0, 0, 'D' }, |
807 | { "embed", 0, 0, 'E' }, |
808 | { "format-in", OPTF_ARGREQ, 0, 'f' }, |
809 | { "format-out", OPTF_ARGREQ, 0, 'F' }, |
810 | { "message", OPTF_ARGREQ, 0, 'm' }, |
811 | { "output", OPTF_ARGREQ, 0, 'o' }, |
812 | { 0, 0, 0, 0 } |
813 | }; |
814 | i = mdwopt(argc, argv, "f:F:m:o:aADE", opt, 0, 0, 0); |
815 | if (i < 0) break; |
816 | switch (i) { |
817 | case 'a': ief = "pem"; break; |
818 | case 'A': oef = "pem"; break; |
819 | case 'f': ief = optarg; break; |
820 | case 'F': oef = optarg; break; |
821 | case 'D': f |= F_DETACH; fm |= F_DETACH; break; |
822 | case 'E': f &= ~F_DETACH; fm |= F_DETACH; break; |
823 | case 'm': mf = optarg; break; |
824 | case 'o': of = optarg; break; |
825 | default: f |= F_BOGUS; break; |
826 | } |
827 | } |
828 | |
829 | if (argc - optind > 2 || (f & F_BOGUS)) |
830 | die(EXIT_FAILURE, "Usage: format [-OPTIONS] [FILE [MESSAGE]]"); |
831 | |
832 | if ((ieo = getenc(ief)) == 0) |
833 | die(EXIT_FAILURE, "encoding `%s' not found", ief); |
834 | if ((oeo = getenc(oef)) == 0) |
835 | die(EXIT_FAILURE, "encoding `%s' not found", oef); |
836 | |
837 | if (optind >= argc) |
838 | fp = stdin; |
839 | else if (strcmp(argv[optind], "-") == 0) { |
840 | fp = stdin; |
841 | optind++; |
842 | } else if ((fp = fopen(argv[optind], ieo->rmode)) == 0) { |
843 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
844 | argv[optind], strerror(errno)); |
845 | } else |
846 | optind++; |
847 | |
848 | if (optind < argc) |
849 | dfn = argv[optind++]; |
850 | |
851 | ie = initdec(ieo, fp, vrfbdry, &v); |
852 | |
853 | /* --- Read the header chunk --- */ |
854 | |
855 | sig_readheader(ie, &s, diechoke, "malformed header"); |
856 | |
857 | if (((s.f ^ v.f) & v.m) != 0) |
858 | moan("boundary string inconsistent with contents (ignoring)"); |
859 | |
860 | mcsetup_read(&mc_in, s.f, &ie, dfn); |
861 | |
862 | /* --- Prepare the output stuff --- */ |
863 | |
864 | if (!of && !mf) of = "-"; |
865 | sf = s.f; |
866 | f = (f & fm) | (s.f & ~fm); |
867 | s.f = f & F_SIGMASK; |
868 | |
869 | if (sf & F_DETACH) |
870 | sig_readsig(ie, &s); |
871 | |
872 | if (!of) |
873 | mcsetup_writenull(&mc_out); |
874 | else { |
875 | if (strcmp(of, "-") == 0) |
876 | ofp = stdout; |
877 | else if ((ofp = fopen(of, oeo->wmode)) == 0) { |
878 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
879 | of, strerror(errno)); |
880 | } |
881 | oe = initenc(oeo, ofp, |
882 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
883 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
884 | "CATSIGN MESSAGE HEADER"); |
885 | sig_writeheader(oe, &s); |
886 | mcsetup_write(&mc_out, f, &oe); |
887 | } |
888 | |
889 | if (mf) { |
890 | if (strcmp(mf, "-") == 0) |
891 | mfp = stdout; |
892 | else if ((mfp = fopen(mf, (f & F_BINARY) ? "wb" : "w")) == 0) { |
893 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
894 | mf, strerror(errno)); |
895 | } |
896 | } |
897 | |
898 | /* --- Wade through the message body --- */ |
899 | |
900 | for (;;) { |
901 | n = mc_in.read(&mc_in, bb); |
902 | if (!n) break; |
903 | mc_out.write(&mc_out, bb, n); |
904 | if (mfp) fwrite(bb, 1, n, mfp); |
905 | } |
906 | mc_endread(&mc_in, ieo, &ie); |
907 | if (of) mc_endwrite(&mc_out, oeo, &oe); |
908 | |
909 | /* --- Write the signature --- */ |
910 | |
911 | if (!(sf & F_DETACH)) |
912 | sig_readsig(ie, &s); |
913 | if (of) { |
914 | sig_writesig(oe, &s); |
915 | oe->ops->encdone(oe); |
916 | } |
917 | |
918 | /* --- All done --- */ |
919 | |
920 | ie->ops->decdone(ie); |
921 | if (ferror(fp) || fclose(fp)) |
922 | die(EXIT_FAILURE, "error reading input signature: %s", strerror(errno)); |
923 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
924 | die(EXIT_FAILURE, "error writing output signature: %s", strerror(errno)); |
925 | if (mfp && (fflush(mfp) || ferror(mfp) || fclose(mfp))) |
926 | die(EXIT_FAILURE, "error writing output message: %s", strerror(errno)); |
927 | freeenc(ie); |
928 | if (of) freeenc(oe); |
929 | sig_destroy(&s); |
930 | return (0); |
931 | } |
932 | |
933 | static void infochoke(const char *m, void *p) |
934 | { |
935 | vrfctx *v = p; |
936 | printf("BAD %s: %s\n", v->what, m); |
937 | exit(EXIT_FAILURE); |
938 | } |
939 | |
940 | static void infokeyreport(const char *file, int line, |
941 | const char *err, void *p) |
942 | { /*whatever*/; } |
943 | |
944 | static int info(int argc, char *argv[]) |
945 | { |
946 | const char *ef = "binary"; |
947 | vrfctx v = { 0, 0, 1 }; |
948 | key_file kf; |
949 | key *k; |
950 | sigmsg s; |
951 | FILE *fp; |
952 | int i; |
953 | struct tm *tm; |
954 | char bb[256]; |
955 | dstr d = DSTR_INIT; |
956 | const encops *eo; |
957 | enc *e; |
958 | |
959 | for (;;) { |
960 | static const struct option opt[] = { |
961 | { "armour", 0, 0, 'a' }, |
962 | { "armor", 0, 0, 'a' }, |
963 | { "format", OPTF_ARGREQ, 0, 'f' }, |
964 | { "gmt", 0, 0, 'u' }, |
965 | { "utc", 0, 0, 'u' }, |
966 | { 0, 0, 0, 0 } |
967 | }; |
968 | i = mdwopt(argc, argv, "f:au", opt, 0, 0, 0); |
969 | if (i < 0) break; |
970 | switch (i) { |
971 | case 'a': ef = "pem"; break; |
972 | case 'f': ef = optarg; break; |
973 | case 'u': v.f |= F_UTC; break; |
974 | default: v.f |= F_BOGUS; break; |
975 | } |
976 | } |
977 | if (argc - optind > 1 || (v.f & F_BOGUS)) |
978 | die(EXIT_FAILURE, "Usage: info [-OPTIONS] [FILE]"); |
979 | |
980 | if ((eo = getenc(ef)) == 0) |
981 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
982 | |
983 | if (optind >= argc) |
984 | fp = stdin; |
985 | else if (strcmp(argv[optind], "-") == 0) { |
986 | fp = stdin; |
987 | optind++; |
988 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
989 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
990 | argv[optind], strerror(errno)); |
991 | } else |
992 | optind++; |
993 | |
994 | if (key_open(&kf, keyring, KOPEN_READ, infokeyreport, 0)) { |
995 | printf("NOTE can't open keyring `%s'\n", keyring); |
996 | keyring = 0; |
997 | } |
998 | e = initdec(eo, fp, vrfbdry, &v); |
999 | |
1000 | v.what = "malformed header"; |
1001 | sig_readheader(e, &s, infochoke, &v); |
1002 | |
1003 | printf("INFO flags %sdetach %sbinary\n", |
1004 | (s.f & F_DETACH) ? "" : "!", |
1005 | (s.f & F_BINARY) ? "" : "!"); |
1006 | |
1007 | if (((s.f ^ v.f) & v.m) != 0) { |
1008 | printf("WARN boundary string inconsistent with contents\n"); |
1009 | printf("INFO expected-flags"); |
1010 | if (v.m & F_DETACH) printf(" %sdetach", (v.f & F_DETACH) ? "" : "!"); |
1011 | if (v.m & F_BINARY) printf(" %sbinary", (v.f & F_BINARY) ? "" : "!"); |
1012 | putchar('\n'); |
1013 | } |
1014 | v.f |= s.f; |
1015 | |
1016 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
1017 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
1018 | printf("INFO date %s\n", bb); |
1019 | |
1020 | if (keyring && (k = key_byid(&kf, s.keyid)) != 0) { |
1021 | dstr_reset(&d); key_fulltag(k, &d); |
1022 | printf("INFO key %s\n", d.buf); |
1023 | } else |
1024 | printf("INFO unknown-key %08lx\n", (unsigned long)s.keyid); |
1025 | |
1026 | if (keyring) key_close(&kf); |
1027 | dstr_destroy(&d); |
1028 | sig_destroy(&s); |
1029 | return (0); |
1030 | } |
1031 | |
1032 | /*----- Main code ---------------------------------------------------------*/ |
1033 | |
1034 | #define LISTS(LI) \ |
1035 | LI("Lists", list, \ |
1036 | listtab[i].name, listtab[i].name) \ |
1037 | LI("Signature schemes", sig, \ |
1038 | sigtab[i].name, sigtab[i].name) \ |
1039 | LI("Encodings", enc, \ |
1040 | enctab[i].name, enctab[i].name) \ |
1041 | LI("Hash functions", hash, \ |
1042 | ghashtab[i], ghashtab[i]->name) |
1043 | |
1044 | MAKELISTTAB(listtab, LISTS) |
1045 | |
1046 | int cmd_show(int argc, char *argv[]) |
1047 | { |
1048 | return (displaylists(listtab, argv + 1)); |
1049 | } |
1050 | |
1051 | static int cmd_help(int, char **); |
1052 | |
1053 | static cmd cmdtab[] = { |
1054 | { "help", cmd_help, "help [COMMAND...]" }, |
1055 | { "show", cmd_show, "show [ITEM...]" }, |
1056 | CMD_ENCODE, |
1057 | CMD_DECODE, |
1058 | { "sign", sign, |
1059 | "sign [-adt] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
1060 | Options:\n\ |
1061 | \n\ |
1062 | -a, --armour Same as `-f pem'.\n\ |
1063 | -b, --binary Treat the input message as binary data.\n\ |
1064 | -d, --detach Produce a detached signature.\n\ |
1065 | -f, --format=FORMAT Encode as FORMAT.\n\ |
1066 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
1067 | -o, --output=FILE Write output to FILE.\n\ |
1068 | -t, --text Canonify input message as a text file.\n\ |
1069 | " }, |
1070 | { "verify", verify, |
1071 | "verify [-abquv] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\ |
1072 | [FILE [MESSAGE]]", "\ |
1073 | Options:\n\ |
1074 | \n\ |
1075 | -a, --armour Same as `-f pem'.\n\ |
1076 | -b, --buffer Buffer message until signature is verified.\n\ |
1077 | -f, --format=FORMAT Decode as FORMAT.\n\ |
1078 | -k, --key=TAG Require that the message be signed by key TAG.\n\ |
1079 | -o, --output=FILE Write message to FILE.\n\ |
1080 | -q, --quiet Produce fewer messages.\n\ |
1081 | -u, --utc Show dates in UTC rather than local time.\n\ |
1082 | -v, --verbose Produce more verbose messages.\n\ |
1083 | " }, |
1084 | { "info", info, |
1085 | "info [-au] [-f FORMAT] [FILE]", "\ |
1086 | Options:\n\ |
1087 | \n\ |
1088 | -a, --armour Same as `-f pem'.\n\ |
1089 | -f, --format=FORMAT Decode as FORMAT.\n\ |
1090 | -u, --utc Show dates in UTC rather than local time.\n\ |
1091 | "}, |
1092 | { "format", format, |
1093 | "format [-auADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\ |
1094 | [FILE [MESSAGE]]", "\ |
1095 | Options:\n\ |
1096 | \n\ |
1097 | -a, --armour-in Same as `-f pem'.\n\ |
1098 | -A, --armour-out Same as `-F pem'.\n\ |
1099 | -D, --detach Create detached signature.\n\ |
1100 | -E, --embed Create signature with embedded message.\n\ |
1101 | -f, --format-in=FORMAT Decode input as FORMAT.\n\ |
1102 | -F, --format-out=FORMAT Encode output as FORMAT.\n\ |
1103 | -m, --message=FILE Write message to FILE.\n\ |
1104 | -o, --output=FILE Write new signature to FILE.\n\ |
1105 | "}, |
1106 | { 0, 0, 0 } |
1107 | }; /* " Emacs seems confused. */ |
1108 | |
1109 | static int cmd_help(int argc, char **argv) |
1110 | { |
1111 | sc_help(cmdtab, stdout, argv + 1); |
1112 | return (0); |
1113 | } |
1114 | |
1115 | void version(FILE *fp) |
1116 | { |
1117 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1118 | } |
1119 | |
1120 | static void usage(FILE *fp) |
1121 | { |
1122 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
1123 | } |
1124 | |
1125 | void help_global(FILE *fp) |
1126 | { |
1127 | usage(fp); |
1128 | fputs("\n\ |
1129 | Sign and verify data.\n\ |
1130 | \n\ |
1131 | Global command-line options:\n\ |
1132 | \n\ |
1133 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
1134 | -v, --version Show program version number.\n\ |
1135 | -u, --usage Show a terse usage message.\n\ |
1136 | \n\ |
1137 | -k, --keyring=FILE Read keys from FILE.\n", |
1138 | fp); |
1139 | } |
1140 | |
1141 | /* --- @main@ --- * |
1142 | * |
1143 | * Arguments: @int argc@ = number of command line arguments |
1144 | * @char *argv[]@ = vector of command line arguments |
1145 | * |
1146 | * Returns: Zero if successful, nonzero otherwise. |
1147 | * |
1148 | * Use: Encrypts or decrypts files. |
1149 | */ |
1150 | |
1151 | int main(int argc, char *argv[]) |
1152 | { |
1153 | unsigned f = 0; |
1154 | |
1155 | #define f_bogus 1u |
1156 | |
1157 | /* --- Initialize the library --- */ |
1158 | |
1159 | ego(argv[0]); |
1160 | sub_init(); |
1161 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
1162 | rand_seed(RAND_GLOBAL, 160); |
1163 | /* trace_on(stderr, 1); */ |
1164 | |
1165 | /* --- Parse options --- */ |
1166 | |
1167 | for (;;) { |
1168 | static struct option opts[] = { |
1169 | { "help", 0, 0, 'h' }, |
1170 | { "version", 0, 0, 'v' }, |
1171 | { "usage", 0, 0, 'u' }, |
1172 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
1173 | { 0, 0, 0, 0 } |
1174 | }; |
1175 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
1176 | if (i < 0) |
1177 | break; |
1178 | switch (i) { |
1179 | case 'h': |
1180 | sc_help(cmdtab, stdout, argv + optind); |
1181 | exit(0); |
1182 | break; |
1183 | case 'v': |
1184 | version(stdout); |
1185 | exit(0); |
1186 | break; |
1187 | case 'u': |
1188 | usage(stdout); |
1189 | exit(0); |
1190 | case 'k': |
1191 | keyring = optarg; |
1192 | break; |
1193 | default: |
1194 | f |= f_bogus; |
1195 | break; |
1196 | } |
1197 | } |
1198 | |
1199 | argc -= optind; |
1200 | argv += optind; |
1201 | optind = 0; |
1202 | if (f & f_bogus || argc < 1) { |
1203 | usage(stderr); |
1204 | exit(EXIT_FAILURE); |
1205 | } |
1206 | |
1207 | /* --- Dispatch to the correct subcommand handler --- */ |
1208 | |
1209 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
1210 | |
1211 | #undef f_bogus |
1212 | } |
1213 | |
1214 | /*----- That's all, folks -------------------------------------------------*/ |