Commit | Line | Data |
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fa54fe1e | 1 | /* -*-c-*- |
2 | * | |
3 | * $Id$ | |
4 | * | |
5 | * Sign files | |
6 | * | |
7 | * (c) 2005 Straylight/Edgeware | |
8 | */ | |
9 | ||
45c0fd36 | 10 | /*----- Licensing notice --------------------------------------------------* |
fa54fe1e | 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. | |
45c0fd36 | 18 | * |
fa54fe1e | 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. | |
45c0fd36 | 23 | * |
fa54fe1e | 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) | |
f52f2db0 | 202 | { return (fread(bp, 1, MSGBUFSZ - 1, m->fp)); } |
fa54fe1e | 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)); | |
45c0fd36 | 295 | } |
fa54fe1e | 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)); | |
45c0fd36 | 313 | } |
fa54fe1e | 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 | ||
02dfbd5b | 370 | h = GH_INIT(s->ch); |
fa54fe1e | 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; | |
45c0fd36 | 442 | dstr d = DSTR_INIT; |
fa54fe1e | 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; | |
45c0fd36 | 621 | else if ((t_fresh = get_date(optarg, 0)) < 0) |
9cea6911 | 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); | |
45c0fd36 | 687 | } |
fa54fe1e | 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))) | |
45c0fd36 | 770 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
fa54fe1e | 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); | |
45c0fd36 | 782 | return (0); |
fa54fe1e | 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' }, | |
45c0fd36 MW |
812 | { "message", OPTF_ARGREQ, 0, 'm' }, |
813 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
fa54fe1e | 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)"); | |
45c0fd36 | 861 | |
fa54fe1e | 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 -------------------------------------------------*/ |