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" |
9cea6911 |
53 | #include "getdate.h" |
fa54fe1e |
54 | #include "cc.h" |
55 | |
56 | #include "ectab.h" |
57 | #include "ptab.h" |
58 | |
fa54fe1e |
59 | /*----- Static variables --------------------------------------------------*/ |
60 | |
61 | static const char *keyring = "keyring"; |
62 | |
63 | /*----- Data formats ------------------------------------------------------* |
64 | * |
65 | * Our crypto stuff is split into three parts: a header describing the key, |
66 | * the message itself, and the signature. In a detached signature, the |
67 | * message is separate, and the header and signature are combined into one |
68 | * encoded chunk. In an attached signature, the message is included. There |
69 | * are two forms of message: binary and text. Binary messages are divided |
70 | * into chunks, each preceded by a 2-octet length, and terminated by a |
71 | * zero-length chunk. Text messages are byte-stuffed, as for RFC821, and |
72 | * trailing whitespace before a newline is ignored. |
73 | */ |
74 | |
75 | typedef struct sigmsg { |
76 | unsigned f; /* Flags */ |
77 | #define F_DETACH 1u |
78 | #define F_BINARY 2u |
79 | #define F_SIGMASK 3u |
80 | #define F_HASHMASK (F_BINARY) |
81 | uint32 keyid; /* Key identifier */ |
82 | time_t t; /* When the signature was made */ |
83 | dstr kh; /* Key fingerprint (sanity check) */ |
84 | dstr sig; /* Signature */ |
85 | sig *s; /* Signature algorithm */ |
86 | } sigmsg; |
87 | |
88 | #define F_MIDLINE 16u |
89 | #define F_EOF 32u |
90 | #define F_NOCLOSE 64u |
91 | #define F_BOGUS 128u |
92 | #define F_BUFFER 256u |
93 | #define F_UTC 512u |
946c3f72 |
94 | #define F_NOCHECK 1024u |
fa54fe1e |
95 | |
96 | /*----- Chunk I/O ---------------------------------------------------------*/ |
97 | |
98 | static void chunk_write(enc *e, const void *p, size_t n) |
99 | { |
100 | octet b[2]; |
101 | |
102 | assert(n <= 0xffff); |
103 | STORE16(b, n); |
104 | if (e->ops->write(e, b, 2) || e->ops->write(e, p, n)) |
105 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
106 | } |
107 | |
108 | static size_t chunk_read(enc *e, void *p) |
109 | { |
110 | octet b[2]; |
111 | size_t n; |
112 | |
113 | if (e->ops->read(e, b, 2) != 2) |
114 | goto err; |
115 | n = LOAD16(b); |
116 | if (n && e->ops->read(e, p, n) != n) |
117 | goto err; |
118 | return (n); |
119 | |
120 | err: |
121 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); |
122 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
123 | return (0); |
124 | } |
125 | |
126 | /*----- Message canonification --------------------------------------------*/ |
127 | |
128 | #define MSGBUFSZ 65536 |
129 | #define MSGBUFTHRESH 32768 |
130 | |
131 | typedef struct msgcanon { |
132 | unsigned f; |
133 | FILE *fp; |
134 | enc *e; |
135 | size_t (*read)(struct msgcanon *, void *); |
136 | void (*write)(struct msgcanon *, const void *, size_t); |
137 | void (*close)(struct msgcanon *); |
138 | } msgcanon; |
139 | |
140 | #define MC_INIT { 0 } |
141 | |
142 | static size_t textread(msgcanon *m, void *bp) |
143 | { |
144 | size_t n = 0, nsp = 0; |
145 | int ch; |
146 | char *b = bp; |
147 | unsigned f = m->f; |
148 | |
149 | if (f & F_EOF) return (0); |
150 | for (;;) { |
151 | if ((ch = getc(m->fp)) == EOF) goto eof; |
152 | if (!(f & (F_DETACH | F_MIDLINE)) && ch == '.') { |
153 | ch = getc(m->fp); |
154 | if (ch == '\n') goto eof; |
155 | } |
156 | if (ch == '\n') { |
157 | n -= nsp; nsp = 0; |
158 | if (n >= MSGBUFTHRESH) goto full; |
159 | b[n++] = ch; |
160 | f &= ~F_MIDLINE; |
161 | } else if (isspace(ch)) { |
162 | f |= F_MIDLINE; |
163 | if (n >= MSGBUFSZ) goto full; |
164 | b[n++] = ch; nsp++; |
165 | } else { |
166 | f |= F_MIDLINE; |
167 | nsp = 0; |
168 | if (n >= MSGBUFTHRESH) goto full; |
169 | b[n++] = ch; |
170 | } |
171 | } |
172 | eof: |
173 | f |= F_EOF; |
174 | goto done; |
175 | full: |
176 | ungetc(ch, m->fp); |
177 | done: |
178 | m->f = f; |
179 | return (n); |
180 | } |
181 | |
182 | static void textwrite(msgcanon *m, const void *bp, size_t n) |
183 | { |
184 | const char *p = bp, *l = p + n; |
185 | unsigned f = m->f; |
186 | |
187 | while (p < l) { |
188 | if (!(f & (F_MIDLINE | F_DETACH)) && |
189 | (*p == '.' || *p == '-')) |
190 | putc('.', m->fp); |
191 | if (*p == '\n') f &= ~F_MIDLINE; |
192 | else f |= F_MIDLINE; |
193 | putc(*p, m->fp); |
194 | p++; |
195 | } |
196 | m->f = f; |
197 | } |
198 | |
199 | static size_t binreadembed(msgcanon *m, void *bp) |
200 | { return (chunk_read(m->e, bp)); } |
201 | static size_t binreaddetach(msgcanon *m, void *bp) |
202 | { return (fread(bp, 1, MSGBUFSZ, m->fp)); } |
203 | |
204 | static void binwriteembed(msgcanon *m, const void *bp, size_t n) |
205 | { chunk_write(m->e, bp, n); } |
206 | |
207 | static void nullwrite(msgcanon *m, const void *bp, size_t n) { ; } |
208 | |
209 | static void mcsetup_readfile(msgcanon *m, unsigned f, const char *fn) |
210 | { |
211 | m->f = F_DETACH | (f & F_BINARY); |
212 | if (!fn || strcmp(fn, "-") == 0) { |
213 | m->fp = stdin; |
214 | m->f |= F_NOCLOSE; |
215 | } else if ((m->fp = fopen(fn, (f & F_BINARY) ? "rb" : "r")) == 0) |
216 | die(EXIT_FAILURE, "couldn't open file `%s': %s", fn, strerror(errno)); |
217 | m->read = (f & F_BINARY) ? binreaddetach : textread; |
218 | } |
219 | |
220 | static void mcsetup_writenull(msgcanon *m) { m->write = nullwrite; } |
221 | |
222 | static void mcsetup_read(msgcanon *m, unsigned f, enc **ee, const char *dfn) |
223 | { |
224 | enc *e = *ee; |
225 | |
226 | m->f = f | F_NOCLOSE; |
227 | |
228 | if (dfn && !(f & F_DETACH)) die(EXIT_FAILURE, "signature is not detached"); |
229 | if (f & F_BINARY) { |
230 | if (!(f & F_DETACH)) { |
231 | m->e = e; |
232 | *ee = 0; |
233 | m->fp = e->fp; |
234 | m->read = binreadembed; |
235 | } else { |
236 | m->read = binreaddetach; |
237 | if (!dfn || strcmp(dfn, "-") == 0) |
238 | m->fp = stdin; |
239 | else if ((m->fp = fopen(dfn, "rb")) == 0) |
240 | die(EXIT_FAILURE, "can't open `%s': %s", dfn, strerror(errno)); |
241 | else |
242 | m->f &= ~F_NOCLOSE; |
243 | } |
244 | } else { |
245 | m->read = textread; |
246 | if (!(f & F_DETACH)) { |
247 | if (e->ops->decdone(e) || ferror(e->fp)) |
248 | die(EXIT_FAILURE, "error at end of signature header"); |
249 | m->fp = e->fp; |
250 | e->ops->destroy(e); |
251 | *ee = 0; |
252 | } else if (!dfn || strcmp(dfn, "-") == 0) |
253 | m->fp = stdin; |
254 | else if ((m->fp = fopen(dfn, "r")) == 0) |
255 | die(EXIT_FAILURE, "can't read file `%s': %s", dfn, strerror(errno)); |
256 | else |
257 | m->f &= ~F_NOCLOSE; |
258 | } |
259 | } |
260 | |
261 | static void mcsetup_write(msgcanon *m, unsigned f, enc **ee) |
262 | { |
263 | enc *e = *ee; |
264 | |
265 | m->f = f | F_NOCLOSE; |
266 | |
267 | if (f & F_DETACH) |
268 | m->write = nullwrite; |
269 | else if (f & F_BINARY) { |
270 | m->e = e; |
271 | *ee = 0; |
272 | m->fp = e->fp; |
273 | m->write = binwriteembed; |
274 | } else { |
275 | if (e->ops->encdone(e) || ferror(e->fp)) |
276 | die(EXIT_FAILURE, "error at end of signature header"); |
277 | m->fp = e->fp; |
278 | e->ops->destroy(e); |
279 | *ee = 0; |
280 | m->write = textwrite; |
281 | } |
282 | } |
283 | |
284 | static void mc_endread(msgcanon *m, const encops *eops, enc **ee) |
285 | { |
286 | if (!(m->f & F_DETACH)) { |
287 | if (m->f & F_BINARY) |
288 | *ee = m->e; |
289 | else |
290 | *ee = initdec(eops, m->fp, checkbdry, "CATSIGN SIGNATURE"); |
291 | } |
292 | if (m->fp && !(m->f & F_NOCLOSE)) { |
293 | if (ferror(m->fp) || fclose(m->fp)) |
294 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
295 | } |
296 | } |
297 | |
298 | static void mc_endwrite(msgcanon *m, const encops *eops, enc **ee) |
299 | { |
300 | if (!(m->f & F_BINARY)) { |
301 | if (m->f & F_MIDLINE) putc('\n', m->fp); |
302 | if (!(m->f & F_DETACH)) { |
303 | putc('.', m->fp); putc('\n', m->fp); |
304 | *ee = initenc(eops, m->fp, "CATSIGN SIGNATURE"); |
305 | } |
306 | } else if (!(m->f & F_DETACH)) { |
307 | chunk_write(m->e, 0, 0); |
308 | *ee = m->e; |
309 | } |
310 | if (m->fp && !(m->f & F_NOCLOSE)) { |
311 | if (fflush(m->fp) || ferror(m->fp) || fclose(m->fp)) |
312 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
313 | } |
314 | } |
315 | |
316 | /*----- Signature reading and writing -------------------------------------*/ |
317 | |
318 | static void sig_init(sigmsg *s, unsigned f, uint32 keyid) |
319 | { |
320 | s->f = f & F_SIGMASK; |
321 | s->keyid = keyid; |
322 | time(&s->t); |
323 | s->s = 0; |
324 | dstr_create(&s->kh); |
325 | dstr_create(&s->sig); |
326 | } |
327 | |
328 | static void sig_destroy(sigmsg *s) |
329 | { |
330 | dstr_destroy(&s->kh); |
331 | dstr_destroy(&s->sig); |
332 | if (s->s) freesig(s->s); |
333 | } |
334 | |
335 | static void sigtobuffer(sigmsg *s, buf *b, int hashp) |
336 | { |
337 | kludge64 t; |
338 | |
339 | ASSIGN64(t, s->t); |
340 | if (hashp) buf_putu16(b, s->f & F_HASHMASK); |
341 | else buf_putu16(b, s->f & F_SIGMASK); |
342 | buf_putu32(b, s->keyid); |
343 | buf_putu32(b, HI64(t)); |
344 | buf_putu32(b, LO64(t)); |
f387fcb1 |
345 | buf_putdstr16(b, &s->kh); |
fa54fe1e |
346 | assert(BOK(b)); |
347 | } |
348 | |
349 | static void dohash(ghash *h, const void *p, size_t n) |
350 | { |
351 | /* trace_block(1, "hashing", p, n); */ |
352 | GH_HASH(h, p, n); |
353 | } |
354 | |
355 | static void sig_hash(sigmsg *s) |
356 | { |
357 | octet bb[16384]; |
358 | buf b; |
359 | |
360 | buf_init(&b, bb, sizeof(bb)); |
361 | sigtobuffer(s, &b, 1); |
362 | dohash(s->s->h, BBASE(&b), BLEN(&b)); |
363 | } |
364 | |
365 | static void keyhash(key *k, sig *s, dstr *d) |
366 | { |
367 | ghash *h; |
368 | key_filter kf; |
369 | |
370 | h = GH_INIT(GH_CLASS(s->h)); |
371 | kf.f = KCAT_PUB; |
372 | kf.m = KF_CATMASK; |
373 | key_fingerprint(k, h, &kf); |
374 | dstr_ensure(d, GH_CLASS(h)->hashsz); |
375 | GH_DONE(h, d->buf + d->len); |
376 | d->len += GH_CLASS(h)->hashsz; |
377 | GH_DESTROY(h); |
378 | } |
379 | |
380 | static void sig_writeheader(enc *e, sigmsg *s) |
381 | { |
382 | octet bb[16384]; |
383 | buf b; |
384 | |
385 | buf_init(&b, bb, sizeof(bb)); |
386 | sigtobuffer(s, &b, 0); |
387 | chunk_write(e, BBASE(&b), BLEN(&b)); |
388 | } |
389 | |
390 | static void sig_writesig(enc *e, sigmsg *s) |
391 | { chunk_write(e, s->sig.buf, s->sig.len); } |
392 | |
393 | static void diechoke(const char *m, void *p) |
394 | { die(EXIT_FAILURE, "%s%s%s", p, p ? ": " : "", m); } |
395 | |
396 | static void sig_readheader(enc *e, sigmsg *s, |
397 | void (*choke)(const char *, void *), void *p) |
398 | { |
399 | uint16 f; |
400 | octet bb[MSGBUFSZ]; |
401 | uint32 x, y; |
402 | kludge64 t; |
403 | buf b; |
404 | size_t n; |
405 | |
406 | n = chunk_read(e, bb); |
407 | buf_init(&b, bb, n); |
408 | if (buf_getu16(&b, &f)) choke("missing flags", p); |
409 | if (buf_getu32(&b, &x)) choke("missing keyid", p); |
410 | sig_init(s, f, x); |
411 | if (buf_getu32(&b, &x) || buf_getu32(&b, &y)) |
412 | choke("missing datestamp", p); |
413 | SET64(t, x, y); s->t = GET64(time_t, t); |
f387fcb1 |
414 | if (buf_getdstr16(&b, &s->kh)) |
fa54fe1e |
415 | choke("missing key hash", p); |
416 | if (BLEFT(&b)) |
417 | choke("junk at end", p); |
418 | } |
419 | |
420 | static void sig_readsig(enc *e, sigmsg *s) |
421 | { |
422 | octet bb[MSGBUFSZ]; |
423 | size_t n; |
424 | |
425 | n = chunk_read(e, bb); |
426 | dstr_putm(&s->sig, bb, n); |
427 | } |
428 | |
429 | /*----- Signing -----------------------------------------------------------*/ |
430 | |
431 | static int sign(int argc, char *argv[]) |
432 | { |
433 | const char *ef = "binary", *fn = 0, *of = 0, *kn = "ccsig", *err; |
434 | unsigned f = 0; |
435 | key_file kf; |
436 | key *k; |
437 | sigmsg s; |
438 | FILE *ofp = 0; |
439 | int i; |
440 | char bb[MSGBUFSZ]; |
441 | size_t n; |
442 | dstr d = DSTR_INIT; |
443 | const encops *eo; |
444 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
445 | enc *e; |
446 | |
447 | for (;;) { |
448 | static const struct option opt[] = { |
449 | { "armour", 0, 0, 'a' }, |
450 | { "armor", 0, 0, 'a' }, |
451 | { "binary", 0, 0, 'b' }, |
452 | { "detach", 0, 0, 'd' }, |
453 | { "key", OPTF_ARGREQ, 0, 'k' }, |
454 | { "format", OPTF_ARGREQ, 0, 'f' }, |
455 | { "output", OPTF_ARGREQ, 0, 'o' }, |
456 | { "text", 0, 0, 't' }, |
946c3f72 |
457 | { "nocheck", 0, 0, 'C' }, |
fa54fe1e |
458 | { 0, 0, 0, 0 } |
459 | }; |
946c3f72 |
460 | i = mdwopt(argc, argv, "k:f:o:abdtC", opt, 0, 0, 0); |
fa54fe1e |
461 | if (i < 0) break; |
462 | switch (i) { |
463 | case 'k': kn = optarg; break; |
464 | case 'f': ef = optarg; break; |
465 | case 'o': of = optarg; break; |
466 | case 'a': ef = "pem"; break; |
467 | case 't': f &= ~F_BINARY; break; |
468 | case 'b': f |= F_BINARY; break; |
469 | case 'd': f |= F_DETACH; break; |
946c3f72 |
470 | case 'C': f |= F_NOCHECK; break; |
fa54fe1e |
471 | default: f |= F_BOGUS; break; |
472 | } |
473 | } |
474 | if (argc - optind > 1 || (f & F_BOGUS)) |
475 | die(EXIT_FAILURE, "Usage: sign [-OPTIONS] [FILE]"); |
476 | |
213e565f |
477 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
fa54fe1e |
478 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
479 | if ((k = key_bytag(&kf, kn)) == 0) |
480 | die(EXIT_FAILURE, "key `%s' not found", kn); |
481 | |
482 | if ((eo = getenc(ef)) == 0) |
483 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
484 | |
485 | fn = (optind >= argc) ? 0 : argv[optind++]; |
486 | |
487 | if (!of || strcmp(of, "-") == 0) |
488 | ofp = stdout; |
489 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
490 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
491 | ofp, strerror(errno)); |
492 | } |
493 | |
494 | /* --- Start the work --- */ |
495 | |
496 | sig_init(&s, f, k->id); |
497 | dstr_reset(&d); |
498 | key_fulltag(k, &d); |
499 | s.s = getsig(k, "ccsig", 1); |
946c3f72 |
500 | if (!(f & F_NOCHECK) && (err = s.s->ops->check(s.s)) != 0) |
fa54fe1e |
501 | moan("key %s fails check: %s", d.buf, err); |
502 | keyhash(k, s.s, &s.kh); |
503 | e = initenc(eo, ofp, |
504 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
505 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
506 | "CATSIGN MESSAGE HEADER"); |
507 | sig_writeheader(e, &s); |
508 | |
509 | /* --- Hash the message --- */ |
510 | |
511 | mcsetup_readfile(&mc_in, f, fn); |
512 | mcsetup_write(&mc_out, f, &e); |
513 | sig_hash(&s); |
514 | for (;;) { |
515 | n = mc_in.read(&mc_in, bb); |
516 | if (!n) break; |
517 | dohash(s.s->h, bb, n); |
518 | mc_out.write(&mc_out, bb, n); |
519 | } |
520 | mc_endread(&mc_in, 0, 0); |
521 | mc_endwrite(&mc_out, eo, &e); |
522 | |
523 | /* --- Write the signature --- */ |
524 | |
525 | if (s.s->ops->doit(s.s, &s.sig)) |
526 | die(EXIT_FAILURE, "signature failed"); |
527 | sig_writesig(e, &s); |
528 | e->ops->encdone(e); |
529 | if (fflush(ofp) || ferror(ofp) || fclose(ofp)) |
530 | die(EXIT_FAILURE, "error writing signature: %s", strerror(errno)); |
531 | |
532 | /* --- All done --- */ |
533 | |
534 | freeenc(e); |
535 | key_close(&kf); |
536 | sig_destroy(&s); |
537 | dstr_destroy(&d); |
538 | return (0); |
539 | } |
540 | |
541 | /*----- Verifying ---------------------------------------------------------*/ |
542 | |
543 | typedef struct vrfctx { |
544 | unsigned f, m; |
545 | int verb; |
546 | const char *what; |
547 | } vrfctx; |
548 | |
549 | static int vrfbdry(const char *b, void *p) |
550 | { |
551 | vrfctx *v = p; |
552 | |
553 | if (strcmp(b, "CATSIGN MESSAGE") == 0) { |
554 | v->f |= F_BINARY; |
555 | v->m |= F_BINARY | F_DETACH; |
556 | return (1); |
557 | } else if (strcmp(b, "CATSIGN MESSAGE HEADER") == 0) { |
558 | v->m |= F_BINARY | F_DETACH; |
559 | return (1); |
560 | } else if (strcmp(b, "CATSIGN SIGNATURE") == 0) { |
561 | v->f |= F_DETACH; |
562 | v->m |= F_DETACH; |
563 | return (1); |
564 | } else |
565 | return (0); |
566 | } |
567 | |
568 | static void vrfchoke(const char *m, void *p) |
569 | { |
570 | vrfctx *v = p; |
571 | if (v->verb) printf("FAIL %s: %s\n", v->what, m); |
572 | exit(EXIT_FAILURE); |
573 | } |
574 | |
575 | static int verify(int argc, char *argv[]) |
576 | { |
577 | const char *ef = "binary", *of = 0, *dfn = 0, *kn = 0, *err; |
578 | vrfctx v = { 0, 0, 1 }; |
579 | key_file kf; |
580 | key *k, *kk = 0; |
581 | sigmsg s; |
582 | FILE *fp, *ofp = 0, *rfp = 0; |
583 | struct tm *tm; |
584 | int i; |
585 | char bb[MSGBUFSZ]; |
586 | size_t n; |
9cea6911 |
587 | time_t t_fresh = 0; |
fa54fe1e |
588 | dstr d = DSTR_INIT, dd = DSTR_INIT; |
589 | const encops *eo; |
590 | msgcanon mc_in = MC_INIT; |
591 | enc *e; |
592 | |
593 | for (;;) { |
594 | static const struct option opt[] = { |
595 | { "armour", 0, 0, 'a' }, |
596 | { "armor", 0, 0, 'a' }, |
597 | { "buffer", 0, 0, 'b' }, |
598 | { "key", OPTF_ARGREQ, 0, 'k' }, |
599 | { "format", OPTF_ARGREQ, 0, 'f' }, |
600 | { "output", OPTF_ARGREQ, 0, 'o' }, |
601 | { "quiet", 0, 0, 'q' }, |
602 | { "utc", 0, 0, 'u' }, |
9cea6911 |
603 | { "fresh-time", 0, 0, 't' }, |
fa54fe1e |
604 | { "gmt", 0, 0, 'u' }, |
605 | { "verbose", 0, 0, 'v' }, |
946c3f72 |
606 | { "nocheck", 0, 0, 'C' }, |
fa54fe1e |
607 | { 0, 0, 0, 0 } |
608 | }; |
cfe65b26 |
609 | i = mdwopt(argc, argv, "k:f:o:abqt:uvC", opt, 0, 0, 0); |
fa54fe1e |
610 | if (i < 0) break; |
611 | switch (i) { |
612 | case 'a': ef = "pem"; break; |
613 | case 'b': v.f |= F_BUFFER; break; |
614 | case 'k': kn = optarg; break; |
615 | case 'f': ef = optarg; break; |
616 | case 'o': of = optarg; break; |
617 | case 'u': v.f |= F_UTC; break; |
946c3f72 |
618 | case 'C': v.f |= F_NOCHECK; break; |
9cea6911 |
619 | case 't': |
620 | if (strcmp(optarg, "always") == 0) t_fresh = 0; |
621 | else if ((t_fresh = get_date(optarg, 0)) < 0) |
622 | die(EXIT_FAILURE, "bad freshness time"); |
623 | break; |
fa54fe1e |
624 | case 'q': if (v.verb > 0) v.verb--; break; |
625 | case 'v': if (v.verb < 10) v.verb++; break; |
626 | default: v.f |= F_BOGUS; break; |
627 | } |
628 | } |
629 | if (argc - optind > 2 || (v.f & F_BOGUS)) |
630 | die(EXIT_FAILURE, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]"); |
631 | |
632 | if ((eo = getenc(ef)) == 0) |
633 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
634 | |
635 | if (optind >= argc) |
636 | fp = stdin; |
637 | else if (strcmp(argv[optind], "-") == 0) { |
638 | fp = stdin; |
639 | optind++; |
640 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
641 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
642 | argv[optind], strerror(errno)); |
643 | } else |
644 | optind++; |
645 | |
213e565f |
646 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
fa54fe1e |
647 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
648 | if (kn && (kk = key_bytag(&kf, kn)) == 0) |
649 | die(EXIT_FAILURE, "key `%s' not found", kn); |
650 | |
651 | e = initdec(eo, fp, vrfbdry, &v); |
652 | |
653 | /* --- Read the header chunk --- */ |
654 | |
655 | v.what = "malformed header"; |
656 | sig_readheader(e, &s, vrfchoke, &v); |
657 | |
658 | if (((s.f ^ v.f) & v.m) != 0) { |
659 | if (v.verb) printf("FAIL boundary string inconsistent with contents\n"); |
660 | exit(EXIT_FAILURE); |
661 | } |
662 | v.f |= s.f; |
663 | |
664 | if ((k = key_byid(&kf, s.keyid)) == 0) { |
665 | if (v.verb) printf("FAIL key id %08lx not found\n", |
666 | (unsigned long)s.keyid); |
667 | exit(EXIT_FAILURE); |
668 | } |
669 | if (kk && k->id != kk->id) { |
670 | if (v.verb) { |
671 | dstr_reset(&d); key_fulltag(k, &d); |
672 | dstr_reset(&dd); key_fulltag(kk, &dd); |
673 | printf("FAIL signing key is %s; expected key %s\n", d.buf, dd.buf); |
674 | } |
675 | exit(EXIT_FAILURE); |
676 | } |
677 | |
678 | s.s = getsig(k, "ccsig", 0); |
679 | dstr_reset(&d); key_fulltag(k, &d); |
946c3f72 |
680 | if (!(v.f & F_NOCHECK) && v.verb && (err = s.s->ops->check(s.s)) != 0) |
fa54fe1e |
681 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
682 | |
683 | dstr_reset(&dd); keyhash(k, s.s, &dd); |
684 | if (dd.len != s.kh.len || memcmp(dd.buf, s.kh.buf, dd.len) != 0) { |
685 | if (v.verb) printf("FAIL key hash mismatch\n"); |
686 | exit(EXIT_FAILURE); |
687 | } |
688 | |
689 | /* --- Now a merry dance --- */ |
690 | |
691 | if (v.f & F_DETACH) |
692 | sig_readsig(e, &s); |
693 | if (optind < argc) |
694 | dfn = argv[optind++]; |
695 | mcsetup_read(&mc_in, v.f, &e, dfn); |
696 | |
697 | if (!of && (v.f & F_DETACH)) { |
698 | rfp = ofp = 0; |
699 | v.f &= ~F_BUFFER; |
700 | } else if (!of || strcmp(of, "-") == 0) { |
701 | v.f |= F_BUFFER; |
702 | ofp = stdout; |
703 | } |
704 | if (of && !(v.f & F_BUFFER)) { |
705 | if ((ofp = fopen(of, (v.f & F_BINARY) ? "wb" : "w")) == 0) { |
706 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
707 | of, strerror(errno)); |
708 | } |
709 | rfp = ofp; |
710 | } else if ((rfp = tmpfile()) == 0) |
711 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); |
712 | |
713 | /* --- Read the message and verify the signature --- */ |
714 | |
715 | sig_hash(&s); |
716 | for (;;) { |
717 | n = mc_in.read(&mc_in, bb); |
718 | if (!n) break; |
719 | dohash(s.s->h, bb, n); |
720 | if (rfp) fwrite(bb, 1, n, rfp); |
721 | } |
722 | mc_endread(&mc_in, eo, &e); |
723 | if (!(v.f & F_DETACH)) |
724 | sig_readsig(e, &s); |
725 | if (rfp && (ferror(rfp) || fflush(rfp))) { |
726 | if (v.verb) printf("FAIL error writing message: %s\n", strerror(errno)); |
727 | exit(EXIT_FAILURE); |
728 | } |
729 | |
730 | /* --- Check the signature --- */ |
731 | |
732 | if (s.s->ops->doit(s.s, &s.sig)) { |
733 | if (v.verb) printf("FAIL signature verification failed\n"); |
734 | exit(EXIT_FAILURE); |
735 | } |
9cea6911 |
736 | if (t_fresh && s.t < t_fresh) { |
737 | if (v.verb) printf("FAIL signature is stale\n"); |
738 | exit(EXIT_FAILURE); |
739 | } |
740 | if (s.t > time(0)) { |
741 | if (v.verb) printf("FAIL signature timestamp in the future\n"); |
742 | exit(EXIT_FAILURE); |
743 | } |
fa54fe1e |
744 | if (v.verb) { |
745 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
746 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
747 | printf("INFO good-signature %s\n", d.buf); |
748 | printf("INFO date %s\n", bb); |
749 | } |
750 | |
751 | /* --- Unbuffer buffered input --- */ |
752 | |
753 | if (v.f & F_BUFFER) { |
754 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { |
755 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
756 | of, strerror(errno)); |
757 | } |
758 | rewind(rfp); |
759 | if (v.verb && ofp == stdout) printf("DATA\n"); |
760 | for (;;) { |
761 | n = fread(bb, 1, sizeof(bb), rfp); |
762 | if (!n) break; |
763 | if (fwrite(bb, 1, n, ofp) < n) |
764 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
765 | } |
766 | if (ferror(rfp) || fclose(rfp)) |
767 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); |
768 | } |
769 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
770 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
771 | |
772 | /* --- Tidy up --- */ |
773 | |
774 | e->ops->decdone(e); |
775 | if (v.verb && ofp != stdout) |
776 | printf("OK verified successfully\n"); |
777 | freeenc(e); |
778 | key_close(&kf); |
779 | sig_destroy(&s); |
780 | dstr_destroy(&d); |
781 | dstr_destroy(&dd); |
782 | return (0); |
783 | } |
784 | |
785 | /*----- Reformatting ------------------------------------------------------*/ |
786 | |
787 | static int format(int argc, char *argv[]) |
788 | { |
789 | const char *ief = "binary", *oef = "binary"; |
790 | const char *dfn = 0, *of = 0, *mf = 0; |
791 | sigmsg s; |
792 | FILE *fp, *ofp = 0, *mfp = 0; |
793 | int i; |
794 | size_t n; |
795 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
796 | char bb[MSGBUFSZ]; |
797 | vrfctx v = { 0, 0, 1 }; |
798 | unsigned f = 0, fm = ~F_SIGMASK, sf; |
799 | const encops *ieo, *oeo; |
800 | enc *ie, *oe; |
801 | |
802 | for (;;) { |
803 | static const struct option opt[] = { |
804 | { "armour-in", 0, 0, 'a' }, |
805 | { "armor-in", 0, 0, 'a' }, |
806 | { "armour-out", 0, 0, 'A' }, |
807 | { "armor-out", 0, 0, 'A' }, |
808 | { "detach", 0, 0, 'D' }, |
809 | { "embed", 0, 0, 'E' }, |
810 | { "format-in", OPTF_ARGREQ, 0, 'f' }, |
811 | { "format-out", OPTF_ARGREQ, 0, 'F' }, |
812 | { "message", OPTF_ARGREQ, 0, 'm' }, |
813 | { "output", OPTF_ARGREQ, 0, 'o' }, |
814 | { 0, 0, 0, 0 } |
815 | }; |
816 | i = mdwopt(argc, argv, "f:F:m:o:aADE", opt, 0, 0, 0); |
817 | if (i < 0) break; |
818 | switch (i) { |
819 | case 'a': ief = "pem"; break; |
820 | case 'A': oef = "pem"; break; |
821 | case 'f': ief = optarg; break; |
822 | case 'F': oef = optarg; break; |
823 | case 'D': f |= F_DETACH; fm |= F_DETACH; break; |
824 | case 'E': f &= ~F_DETACH; fm |= F_DETACH; break; |
825 | case 'm': mf = optarg; break; |
826 | case 'o': of = optarg; break; |
827 | default: f |= F_BOGUS; break; |
828 | } |
829 | } |
830 | |
831 | if (argc - optind > 2 || (f & F_BOGUS)) |
832 | die(EXIT_FAILURE, "Usage: format [-OPTIONS] [FILE [MESSAGE]]"); |
833 | |
834 | if ((ieo = getenc(ief)) == 0) |
835 | die(EXIT_FAILURE, "encoding `%s' not found", ief); |
836 | if ((oeo = getenc(oef)) == 0) |
837 | die(EXIT_FAILURE, "encoding `%s' not found", oef); |
838 | |
839 | if (optind >= argc) |
840 | fp = stdin; |
841 | else if (strcmp(argv[optind], "-") == 0) { |
842 | fp = stdin; |
843 | optind++; |
844 | } else if ((fp = fopen(argv[optind], ieo->rmode)) == 0) { |
845 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
846 | argv[optind], strerror(errno)); |
847 | } else |
848 | optind++; |
849 | |
850 | if (optind < argc) |
851 | dfn = argv[optind++]; |
852 | |
853 | ie = initdec(ieo, fp, vrfbdry, &v); |
854 | |
855 | /* --- Read the header chunk --- */ |
856 | |
857 | sig_readheader(ie, &s, diechoke, "malformed header"); |
858 | |
859 | if (((s.f ^ v.f) & v.m) != 0) |
860 | moan("boundary string inconsistent with contents (ignoring)"); |
861 | |
862 | mcsetup_read(&mc_in, s.f, &ie, dfn); |
863 | |
864 | /* --- Prepare the output stuff --- */ |
865 | |
866 | if (!of && !mf) of = "-"; |
867 | sf = s.f; |
868 | f = (f & fm) | (s.f & ~fm); |
869 | s.f = f & F_SIGMASK; |
870 | |
871 | if (sf & F_DETACH) |
872 | sig_readsig(ie, &s); |
873 | |
874 | if (!of) |
875 | mcsetup_writenull(&mc_out); |
876 | else { |
877 | if (strcmp(of, "-") == 0) |
878 | ofp = stdout; |
879 | else if ((ofp = fopen(of, oeo->wmode)) == 0) { |
880 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
881 | of, strerror(errno)); |
882 | } |
883 | oe = initenc(oeo, ofp, |
884 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
885 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
886 | "CATSIGN MESSAGE HEADER"); |
887 | sig_writeheader(oe, &s); |
888 | mcsetup_write(&mc_out, f, &oe); |
889 | } |
890 | |
891 | if (mf) { |
892 | if (strcmp(mf, "-") == 0) |
893 | mfp = stdout; |
894 | else if ((mfp = fopen(mf, (f & F_BINARY) ? "wb" : "w")) == 0) { |
895 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
896 | mf, strerror(errno)); |
897 | } |
898 | } |
899 | |
900 | /* --- Wade through the message body --- */ |
901 | |
902 | for (;;) { |
903 | n = mc_in.read(&mc_in, bb); |
904 | if (!n) break; |
905 | mc_out.write(&mc_out, bb, n); |
906 | if (mfp) fwrite(bb, 1, n, mfp); |
907 | } |
908 | mc_endread(&mc_in, ieo, &ie); |
909 | if (of) mc_endwrite(&mc_out, oeo, &oe); |
910 | |
911 | /* --- Write the signature --- */ |
912 | |
913 | if (!(sf & F_DETACH)) |
914 | sig_readsig(ie, &s); |
915 | if (of) { |
916 | sig_writesig(oe, &s); |
917 | oe->ops->encdone(oe); |
918 | } |
919 | |
920 | /* --- All done --- */ |
921 | |
922 | ie->ops->decdone(ie); |
923 | if (ferror(fp) || fclose(fp)) |
924 | die(EXIT_FAILURE, "error reading input signature: %s", strerror(errno)); |
925 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
926 | die(EXIT_FAILURE, "error writing output signature: %s", strerror(errno)); |
927 | if (mfp && (fflush(mfp) || ferror(mfp) || fclose(mfp))) |
928 | die(EXIT_FAILURE, "error writing output message: %s", strerror(errno)); |
929 | freeenc(ie); |
930 | if (of) freeenc(oe); |
931 | sig_destroy(&s); |
932 | return (0); |
933 | } |
934 | |
935 | static void infochoke(const char *m, void *p) |
936 | { |
937 | vrfctx *v = p; |
938 | printf("BAD %s: %s\n", v->what, m); |
939 | exit(EXIT_FAILURE); |
940 | } |
941 | |
942 | static void infokeyreport(const char *file, int line, |
943 | const char *err, void *p) |
944 | { /*whatever*/; } |
945 | |
946 | static int info(int argc, char *argv[]) |
947 | { |
948 | const char *ef = "binary"; |
949 | vrfctx v = { 0, 0, 1 }; |
950 | key_file kf; |
951 | key *k; |
952 | sigmsg s; |
953 | FILE *fp; |
954 | int i; |
955 | struct tm *tm; |
956 | char bb[256]; |
957 | dstr d = DSTR_INIT; |
958 | const encops *eo; |
959 | enc *e; |
960 | |
961 | for (;;) { |
962 | static const struct option opt[] = { |
963 | { "armour", 0, 0, 'a' }, |
964 | { "armor", 0, 0, 'a' }, |
965 | { "format", OPTF_ARGREQ, 0, 'f' }, |
966 | { "gmt", 0, 0, 'u' }, |
967 | { "utc", 0, 0, 'u' }, |
968 | { 0, 0, 0, 0 } |
969 | }; |
970 | i = mdwopt(argc, argv, "f:au", opt, 0, 0, 0); |
971 | if (i < 0) break; |
972 | switch (i) { |
973 | case 'a': ef = "pem"; break; |
974 | case 'f': ef = optarg; break; |
975 | case 'u': v.f |= F_UTC; break; |
976 | default: v.f |= F_BOGUS; break; |
977 | } |
978 | } |
979 | if (argc - optind > 1 || (v.f & F_BOGUS)) |
980 | die(EXIT_FAILURE, "Usage: info [-OPTIONS] [FILE]"); |
981 | |
982 | if ((eo = getenc(ef)) == 0) |
983 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
984 | |
985 | if (optind >= argc) |
986 | fp = stdin; |
987 | else if (strcmp(argv[optind], "-") == 0) { |
988 | fp = stdin; |
989 | optind++; |
990 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
991 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
992 | argv[optind], strerror(errno)); |
993 | } else |
994 | optind++; |
995 | |
996 | if (key_open(&kf, keyring, KOPEN_READ, infokeyreport, 0)) { |
997 | printf("NOTE can't open keyring `%s'\n", keyring); |
998 | keyring = 0; |
999 | } |
1000 | e = initdec(eo, fp, vrfbdry, &v); |
1001 | |
1002 | v.what = "malformed header"; |
1003 | sig_readheader(e, &s, infochoke, &v); |
1004 | |
1005 | printf("INFO flags %sdetach %sbinary\n", |
1006 | (s.f & F_DETACH) ? "" : "!", |
1007 | (s.f & F_BINARY) ? "" : "!"); |
1008 | |
1009 | if (((s.f ^ v.f) & v.m) != 0) { |
1010 | printf("WARN boundary string inconsistent with contents\n"); |
1011 | printf("INFO expected-flags"); |
1012 | if (v.m & F_DETACH) printf(" %sdetach", (v.f & F_DETACH) ? "" : "!"); |
1013 | if (v.m & F_BINARY) printf(" %sbinary", (v.f & F_BINARY) ? "" : "!"); |
1014 | putchar('\n'); |
1015 | } |
1016 | v.f |= s.f; |
1017 | |
1018 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
1019 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
1020 | printf("INFO date %s\n", bb); |
1021 | |
1022 | if (keyring && (k = key_byid(&kf, s.keyid)) != 0) { |
1023 | dstr_reset(&d); key_fulltag(k, &d); |
1024 | printf("INFO key %s\n", d.buf); |
1025 | } else |
1026 | printf("INFO unknown-key %08lx\n", (unsigned long)s.keyid); |
1027 | |
1028 | if (keyring) key_close(&kf); |
1029 | dstr_destroy(&d); |
1030 | sig_destroy(&s); |
1031 | return (0); |
1032 | } |
1033 | |
1034 | /*----- Main code ---------------------------------------------------------*/ |
1035 | |
1036 | #define LISTS(LI) \ |
1037 | LI("Lists", list, \ |
1038 | listtab[i].name, listtab[i].name) \ |
1039 | LI("Signature schemes", sig, \ |
1040 | sigtab[i].name, sigtab[i].name) \ |
1041 | LI("Encodings", enc, \ |
1042 | enctab[i].name, enctab[i].name) \ |
1043 | LI("Hash functions", hash, \ |
1044 | ghashtab[i], ghashtab[i]->name) |
1045 | |
1046 | MAKELISTTAB(listtab, LISTS) |
1047 | |
1048 | int cmd_show(int argc, char *argv[]) |
1049 | { |
1050 | return (displaylists(listtab, argv + 1)); |
1051 | } |
1052 | |
1053 | static int cmd_help(int, char **); |
1054 | |
1055 | static cmd cmdtab[] = { |
1056 | { "help", cmd_help, "help [COMMAND...]" }, |
1057 | { "show", cmd_show, "show [ITEM...]" }, |
1058 | CMD_ENCODE, |
1059 | CMD_DECODE, |
1060 | { "sign", sign, |
946c3f72 |
1061 | "sign [-adtC] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
fa54fe1e |
1062 | Options:\n\ |
1063 | \n\ |
1064 | -a, --armour Same as `-f pem'.\n\ |
1065 | -b, --binary Treat the input message as binary data.\n\ |
1066 | -d, --detach Produce a detached signature.\n\ |
1067 | -f, --format=FORMAT Encode as FORMAT.\n\ |
1068 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
1069 | -o, --output=FILE Write output to FILE.\n\ |
1070 | -t, --text Canonify input message as a text file.\n\ |
946c3f72 |
1071 | -C, --nocheck Don't check the private key.\n\ |
fa54fe1e |
1072 | " }, |
1073 | { "verify", verify, |
946c3f72 |
1074 | "verify [-abquvC] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\ |
fa54fe1e |
1075 | [FILE [MESSAGE]]", "\ |
1076 | Options:\n\ |
1077 | \n\ |
1078 | -a, --armour Same as `-f pem'.\n\ |
1079 | -b, --buffer Buffer message until signature is verified.\n\ |
1080 | -f, --format=FORMAT Decode as FORMAT.\n\ |
1081 | -k, --key=TAG Require that the message be signed by key TAG.\n\ |
1082 | -o, --output=FILE Write message to FILE.\n\ |
1083 | -q, --quiet Produce fewer messages.\n\ |
9cea6911 |
1084 | -t, --freshtime=TIME Only accept signatures made after this time.\n\ |
fa54fe1e |
1085 | -u, --utc Show dates in UTC rather than local time.\n\ |
1086 | -v, --verbose Produce more verbose messages.\n\ |
946c3f72 |
1087 | -C, --nocheck Don't check the public key.\n\ |
fa54fe1e |
1088 | " }, |
1089 | { "info", info, |
1090 | "info [-au] [-f FORMAT] [FILE]", "\ |
1091 | Options:\n\ |
1092 | \n\ |
1093 | -a, --armour Same as `-f pem'.\n\ |
1094 | -f, --format=FORMAT Decode as FORMAT.\n\ |
1095 | -u, --utc Show dates in UTC rather than local time.\n\ |
1096 | "}, |
1097 | { "format", format, |
1098 | "format [-auADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\ |
1099 | [FILE [MESSAGE]]", "\ |
1100 | Options:\n\ |
1101 | \n\ |
1102 | -a, --armour-in Same as `-f pem'.\n\ |
1103 | -A, --armour-out Same as `-F pem'.\n\ |
1104 | -D, --detach Create detached signature.\n\ |
1105 | -E, --embed Create signature with embedded message.\n\ |
1106 | -f, --format-in=FORMAT Decode input as FORMAT.\n\ |
1107 | -F, --format-out=FORMAT Encode output as FORMAT.\n\ |
1108 | -m, --message=FILE Write message to FILE.\n\ |
1109 | -o, --output=FILE Write new signature to FILE.\n\ |
1110 | "}, |
1111 | { 0, 0, 0 } |
1112 | }; /* " Emacs seems confused. */ |
1113 | |
1114 | static int cmd_help(int argc, char **argv) |
1115 | { |
1116 | sc_help(cmdtab, stdout, argv + 1); |
1117 | return (0); |
1118 | } |
1119 | |
1120 | void version(FILE *fp) |
1121 | { |
1122 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1123 | } |
1124 | |
1125 | static void usage(FILE *fp) |
1126 | { |
1127 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
1128 | } |
1129 | |
1130 | void help_global(FILE *fp) |
1131 | { |
1132 | usage(fp); |
1133 | fputs("\n\ |
1134 | Sign and verify data.\n\ |
1135 | \n\ |
1136 | Global command-line options:\n\ |
1137 | \n\ |
1138 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
1139 | -v, --version Show program version number.\n\ |
1140 | -u, --usage Show a terse usage message.\n\ |
1141 | \n\ |
1142 | -k, --keyring=FILE Read keys from FILE.\n", |
1143 | fp); |
1144 | } |
1145 | |
1146 | /* --- @main@ --- * |
1147 | * |
1148 | * Arguments: @int argc@ = number of command line arguments |
1149 | * @char *argv[]@ = vector of command line arguments |
1150 | * |
1151 | * Returns: Zero if successful, nonzero otherwise. |
1152 | * |
1153 | * Use: Encrypts or decrypts files. |
1154 | */ |
1155 | |
1156 | int main(int argc, char *argv[]) |
1157 | { |
1158 | unsigned f = 0; |
1159 | |
1160 | #define f_bogus 1u |
1161 | |
1162 | /* --- Initialize the library --- */ |
1163 | |
1164 | ego(argv[0]); |
1165 | sub_init(); |
1166 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
1167 | rand_seed(RAND_GLOBAL, 160); |
1168 | /* trace_on(stderr, 1); */ |
1169 | |
1170 | /* --- Parse options --- */ |
1171 | |
1172 | for (;;) { |
1173 | static struct option opts[] = { |
1174 | { "help", 0, 0, 'h' }, |
1175 | { "version", 0, 0, 'v' }, |
1176 | { "usage", 0, 0, 'u' }, |
1177 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
1178 | { 0, 0, 0, 0 } |
1179 | }; |
1180 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
1181 | if (i < 0) |
1182 | break; |
1183 | switch (i) { |
1184 | case 'h': |
1185 | sc_help(cmdtab, stdout, argv + optind); |
1186 | exit(0); |
1187 | break; |
1188 | case 'v': |
1189 | version(stdout); |
1190 | exit(0); |
1191 | break; |
1192 | case 'u': |
1193 | usage(stdout); |
1194 | exit(0); |
1195 | case 'k': |
1196 | keyring = optarg; |
1197 | break; |
1198 | default: |
1199 | f |= f_bogus; |
1200 | break; |
1201 | } |
1202 | } |
1203 | |
1204 | argc -= optind; |
1205 | argv += optind; |
1206 | optind = 0; |
1207 | if (f & f_bogus || argc < 1) { |
1208 | usage(stderr); |
1209 | exit(EXIT_FAILURE); |
1210 | } |
1211 | |
1212 | /* --- Dispatch to the correct subcommand handler --- */ |
1213 | |
1214 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
1215 | |
1216 | #undef f_bogus |
1217 | } |
1218 | |
1219 | /*----- That's all, folks -------------------------------------------------*/ |