Commit | Line | Data |
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fa54fe1e | 1 | /* -*-c-*- |
fa54fe1e | 2 | * |
3 | * Sign files | |
4 | * | |
5 | * (c) 2005 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
fa54fe1e | 9 | * |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
45c0fd36 | 16 | * |
fa54fe1e | 17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
45c0fd36 | 21 | * |
fa54fe1e | 22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | /*----- Header files ------------------------------------------------------*/ | |
29 | ||
cd6eca43 MW |
30 | #define _FILE_OFFSET_BITS 64 |
31 | ||
fa54fe1e | 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 |
cd6eca43 | 95 | #define F_PROGRESS 2048u |
fa54fe1e | 96 | |
97 | /*----- Chunk I/O ---------------------------------------------------------*/ | |
98 | ||
99 | static void chunk_write(enc *e, const void *p, size_t n) | |
100 | { | |
101 | octet b[2]; | |
102 | ||
103 | assert(n <= 0xffff); | |
104 | STORE16(b, n); | |
105 | if (e->ops->write(e, b, 2) || e->ops->write(e, p, n)) | |
106 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); | |
107 | } | |
108 | ||
109 | static size_t chunk_read(enc *e, void *p) | |
110 | { | |
111 | octet b[2]; | |
112 | size_t n; | |
113 | ||
114 | if (e->ops->read(e, b, 2) != 2) | |
115 | goto err; | |
116 | n = LOAD16(b); | |
117 | if (n && e->ops->read(e, p, n) != n) | |
118 | goto err; | |
119 | return (n); | |
120 | ||
121 | err: | |
122 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); | |
123 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); | |
124 | return (0); | |
125 | } | |
126 | ||
127 | /*----- Message canonification --------------------------------------------*/ | |
128 | ||
129 | #define MSGBUFSZ 65536 | |
130 | #define MSGBUFTHRESH 32768 | |
131 | ||
132 | typedef struct msgcanon { | |
133 | unsigned f; | |
134 | FILE *fp; | |
135 | enc *e; | |
cd6eca43 | 136 | fprogress ff; |
fa54fe1e | 137 | size_t (*read)(struct msgcanon *, void *); |
138 | void (*write)(struct msgcanon *, const void *, size_t); | |
139 | void (*close)(struct msgcanon *); | |
140 | } msgcanon; | |
141 | ||
142 | #define MC_INIT { 0 } | |
143 | ||
144 | static size_t textread(msgcanon *m, void *bp) | |
145 | { | |
146 | size_t n = 0, nsp = 0; | |
147 | int ch; | |
148 | char *b = bp; | |
149 | unsigned f = m->f; | |
150 | ||
151 | if (f & F_EOF) return (0); | |
152 | for (;;) { | |
153 | if ((ch = getc(m->fp)) == EOF) goto eof; | |
154 | if (!(f & (F_DETACH | F_MIDLINE)) && ch == '.') { | |
155 | ch = getc(m->fp); | |
156 | if (ch == '\n') goto eof; | |
157 | } | |
158 | if (ch == '\n') { | |
159 | n -= nsp; nsp = 0; | |
160 | if (n >= MSGBUFTHRESH) goto full; | |
161 | b[n++] = ch; | |
162 | f &= ~F_MIDLINE; | |
163 | } else if (isspace(ch)) { | |
164 | f |= F_MIDLINE; | |
165 | if (n >= MSGBUFSZ) goto full; | |
166 | b[n++] = ch; nsp++; | |
167 | } else { | |
168 | f |= F_MIDLINE; | |
169 | nsp = 0; | |
170 | if (n >= MSGBUFTHRESH) goto full; | |
171 | b[n++] = ch; | |
172 | } | |
173 | } | |
174 | eof: | |
175 | f |= F_EOF; | |
176 | goto done; | |
177 | full: | |
178 | ungetc(ch, m->fp); | |
179 | done: | |
180 | m->f = f; | |
cd6eca43 | 181 | if (m->f & F_PROGRESS) fprogress_update(&m->ff, n); |
fa54fe1e | 182 | return (n); |
183 | } | |
184 | ||
185 | static void textwrite(msgcanon *m, const void *bp, size_t n) | |
186 | { | |
187 | const char *p = bp, *l = p + n; | |
188 | unsigned f = m->f; | |
189 | ||
190 | while (p < l) { | |
191 | if (!(f & (F_MIDLINE | F_DETACH)) && | |
192 | (*p == '.' || *p == '-')) | |
193 | putc('.', m->fp); | |
194 | if (*p == '\n') f &= ~F_MIDLINE; | |
195 | else f |= F_MIDLINE; | |
196 | putc(*p, m->fp); | |
197 | p++; | |
198 | } | |
199 | m->f = f; | |
200 | } | |
201 | ||
202 | static size_t binreadembed(msgcanon *m, void *bp) | |
cd6eca43 MW |
203 | { |
204 | size_t n = chunk_read(m->e, bp); | |
205 | if (m->f & F_PROGRESS) fprogress_update(&m->ff, n); | |
206 | return (n); | |
207 | } | |
208 | ||
fa54fe1e | 209 | static size_t binreaddetach(msgcanon *m, void *bp) |
cd6eca43 MW |
210 | { |
211 | size_t n = fread(bp, 1, MSGBUFSZ - 1, m->fp); | |
212 | if (m->f & F_PROGRESS) fprogress_update(&m->ff, n); | |
213 | return (n); | |
214 | } | |
fa54fe1e | 215 | |
216 | static void binwriteembed(msgcanon *m, const void *bp, size_t n) | |
217 | { chunk_write(m->e, bp, n); } | |
218 | ||
219 | static void nullwrite(msgcanon *m, const void *bp, size_t n) { ; } | |
220 | ||
221 | static void mcsetup_readfile(msgcanon *m, unsigned f, const char *fn) | |
222 | { | |
cd6eca43 | 223 | m->f = F_DETACH | (f & (F_BINARY | F_PROGRESS)); |
fa54fe1e | 224 | if (!fn || strcmp(fn, "-") == 0) { |
225 | m->fp = stdin; | |
226 | m->f |= F_NOCLOSE; | |
227 | } else if ((m->fp = fopen(fn, (f & F_BINARY) ? "rb" : "r")) == 0) | |
228 | die(EXIT_FAILURE, "couldn't open file `%s': %s", fn, strerror(errno)); | |
cd6eca43 MW |
229 | if (m->f & F_PROGRESS) { |
230 | if (fprogress_init(&m->ff, fn, m->fp)) { | |
231 | die(EXIT_FAILURE, "failed to initialize progress indicator: %s", | |
232 | strerror(errno)); | |
233 | } | |
234 | } | |
fa54fe1e | 235 | m->read = (f & F_BINARY) ? binreaddetach : textread; |
236 | } | |
237 | ||
238 | static void mcsetup_writenull(msgcanon *m) { m->write = nullwrite; } | |
239 | ||
cd6eca43 MW |
240 | static void mcsetup_read(msgcanon *m, unsigned f, enc **ee, |
241 | const char *fn, const char *dfn) | |
fa54fe1e | 242 | { |
243 | enc *e = *ee; | |
244 | ||
245 | m->f = f | F_NOCLOSE; | |
246 | ||
247 | if (dfn && !(f & F_DETACH)) die(EXIT_FAILURE, "signature is not detached"); | |
248 | if (f & F_BINARY) { | |
249 | if (!(f & F_DETACH)) { | |
250 | m->e = e; | |
251 | *ee = 0; | |
252 | m->fp = e->fp; | |
253 | m->read = binreadembed; | |
cd6eca43 MW |
254 | if (m->f & F_PROGRESS) { |
255 | if (fprogress_init(&m->ff, fn, m->fp)) { | |
256 | die(EXIT_FAILURE, "failed to initialize progress indicator: %s", | |
257 | strerror(errno)); | |
258 | } | |
259 | } | |
fa54fe1e | 260 | } else { |
261 | m->read = binreaddetach; | |
262 | if (!dfn || strcmp(dfn, "-") == 0) | |
263 | m->fp = stdin; | |
264 | else if ((m->fp = fopen(dfn, "rb")) == 0) | |
265 | die(EXIT_FAILURE, "can't open `%s': %s", dfn, strerror(errno)); | |
266 | else | |
267 | m->f &= ~F_NOCLOSE; | |
cd6eca43 MW |
268 | if (m->f & F_PROGRESS) { |
269 | if (fprogress_init(&m->ff, dfn, m->fp)) { | |
270 | die(EXIT_FAILURE, "failed to initialize progress indicator: %s", | |
271 | strerror(errno)); | |
272 | } | |
273 | } | |
fa54fe1e | 274 | } |
275 | } else { | |
276 | m->read = textread; | |
277 | if (!(f & F_DETACH)) { | |
278 | if (e->ops->decdone(e) || ferror(e->fp)) | |
279 | die(EXIT_FAILURE, "error at end of signature header"); | |
280 | m->fp = e->fp; | |
281 | e->ops->destroy(e); | |
282 | *ee = 0; | |
cd6eca43 MW |
283 | if (m->f & F_PROGRESS) { |
284 | if (fprogress_init(&m->ff, fn, m->fp)) { | |
285 | die(EXIT_FAILURE, "failed to initialize progress indicator: %s", | |
286 | strerror(errno)); | |
287 | } | |
288 | } | |
289 | } else { | |
290 | if (!dfn || strcmp(dfn, "-") == 0) | |
291 | m->fp = stdin; | |
292 | else if ((m->fp = fopen(dfn, "r")) == 0) | |
293 | die(EXIT_FAILURE, "can't read file `%s': %s", dfn, strerror(errno)); | |
294 | else | |
295 | m->f &= ~F_NOCLOSE; | |
296 | if (m->f & F_PROGRESS) { | |
297 | if (fprogress_init(&m->ff, dfn, m->fp)) { | |
298 | die(EXIT_FAILURE, "failed to initialize progress indicator: %s", | |
299 | strerror(errno)); | |
300 | } | |
301 | } | |
302 | } | |
fa54fe1e | 303 | } |
304 | } | |
305 | ||
306 | static void mcsetup_write(msgcanon *m, unsigned f, enc **ee) | |
307 | { | |
308 | enc *e = *ee; | |
309 | ||
310 | m->f = f | F_NOCLOSE; | |
311 | ||
312 | if (f & F_DETACH) | |
313 | m->write = nullwrite; | |
314 | else if (f & F_BINARY) { | |
315 | m->e = e; | |
316 | *ee = 0; | |
317 | m->fp = e->fp; | |
318 | m->write = binwriteembed; | |
319 | } else { | |
320 | if (e->ops->encdone(e) || ferror(e->fp)) | |
321 | die(EXIT_FAILURE, "error at end of signature header"); | |
322 | m->fp = e->fp; | |
323 | e->ops->destroy(e); | |
324 | *ee = 0; | |
325 | m->write = textwrite; | |
326 | } | |
327 | } | |
328 | ||
329 | static void mc_endread(msgcanon *m, const encops *eops, enc **ee) | |
330 | { | |
331 | if (!(m->f & F_DETACH)) { | |
332 | if (m->f & F_BINARY) | |
333 | *ee = m->e; | |
334 | else | |
335 | *ee = initdec(eops, m->fp, checkbdry, "CATSIGN SIGNATURE"); | |
336 | } | |
337 | if (m->fp && !(m->f & F_NOCLOSE)) { | |
338 | if (ferror(m->fp) || fclose(m->fp)) | |
339 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); | |
45c0fd36 | 340 | } |
cd6eca43 | 341 | if (m->f & F_PROGRESS) fprogress_done(&m->ff); |
fa54fe1e | 342 | } |
343 | ||
344 | static void mc_endwrite(msgcanon *m, const encops *eops, enc **ee) | |
345 | { | |
346 | if (!(m->f & F_BINARY)) { | |
347 | if (m->f & F_MIDLINE) putc('\n', m->fp); | |
348 | if (!(m->f & F_DETACH)) { | |
349 | putc('.', m->fp); putc('\n', m->fp); | |
350 | *ee = initenc(eops, m->fp, "CATSIGN SIGNATURE"); | |
351 | } | |
352 | } else if (!(m->f & F_DETACH)) { | |
353 | chunk_write(m->e, 0, 0); | |
354 | *ee = m->e; | |
355 | } | |
356 | if (m->fp && !(m->f & F_NOCLOSE)) { | |
357 | if (fflush(m->fp) || ferror(m->fp) || fclose(m->fp)) | |
358 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); | |
45c0fd36 | 359 | } |
fa54fe1e | 360 | } |
361 | ||
362 | /*----- Signature reading and writing -------------------------------------*/ | |
363 | ||
364 | static void sig_init(sigmsg *s, unsigned f, uint32 keyid) | |
365 | { | |
366 | s->f = f & F_SIGMASK; | |
367 | s->keyid = keyid; | |
368 | time(&s->t); | |
369 | s->s = 0; | |
370 | dstr_create(&s->kh); | |
371 | dstr_create(&s->sig); | |
372 | } | |
373 | ||
374 | static void sig_destroy(sigmsg *s) | |
375 | { | |
376 | dstr_destroy(&s->kh); | |
377 | dstr_destroy(&s->sig); | |
378 | if (s->s) freesig(s->s); | |
379 | } | |
380 | ||
381 | static void sigtobuffer(sigmsg *s, buf *b, int hashp) | |
382 | { | |
383 | kludge64 t; | |
384 | ||
385 | ASSIGN64(t, s->t); | |
386 | if (hashp) buf_putu16(b, s->f & F_HASHMASK); | |
387 | else buf_putu16(b, s->f & F_SIGMASK); | |
388 | buf_putu32(b, s->keyid); | |
389 | buf_putu32(b, HI64(t)); | |
390 | buf_putu32(b, LO64(t)); | |
f387fcb1 | 391 | buf_putdstr16(b, &s->kh); |
fa54fe1e | 392 | assert(BOK(b)); |
393 | } | |
394 | ||
395 | static void dohash(ghash *h, const void *p, size_t n) | |
396 | { | |
fa54fe1e | 397 | GH_HASH(h, p, n); |
398 | } | |
399 | ||
400 | static void sig_hash(sigmsg *s) | |
401 | { | |
402 | octet bb[16384]; | |
403 | buf b; | |
404 | ||
405 | buf_init(&b, bb, sizeof(bb)); | |
406 | sigtobuffer(s, &b, 1); | |
407 | dohash(s->s->h, BBASE(&b), BLEN(&b)); | |
408 | } | |
409 | ||
410 | static void keyhash(key *k, sig *s, dstr *d) | |
411 | { | |
412 | ghash *h; | |
413 | key_filter kf; | |
414 | ||
02dfbd5b | 415 | h = GH_INIT(s->ch); |
fa54fe1e | 416 | kf.f = KCAT_PUB; |
417 | kf.m = KF_CATMASK; | |
418 | key_fingerprint(k, h, &kf); | |
419 | dstr_ensure(d, GH_CLASS(h)->hashsz); | |
420 | GH_DONE(h, d->buf + d->len); | |
421 | d->len += GH_CLASS(h)->hashsz; | |
422 | GH_DESTROY(h); | |
423 | } | |
424 | ||
425 | static void sig_writeheader(enc *e, sigmsg *s) | |
426 | { | |
427 | octet bb[16384]; | |
428 | buf b; | |
429 | ||
430 | buf_init(&b, bb, sizeof(bb)); | |
431 | sigtobuffer(s, &b, 0); | |
432 | chunk_write(e, BBASE(&b), BLEN(&b)); | |
433 | } | |
434 | ||
435 | static void sig_writesig(enc *e, sigmsg *s) | |
436 | { chunk_write(e, s->sig.buf, s->sig.len); } | |
437 | ||
438 | static void diechoke(const char *m, void *p) | |
9b1663a5 | 439 | { die(EXIT_FAILURE, "%s%s%s", (const char *)p, p ? ": " : "", m); } |
fa54fe1e | 440 | |
441 | static void sig_readheader(enc *e, sigmsg *s, | |
442 | void (*choke)(const char *, void *), void *p) | |
443 | { | |
444 | uint16 f; | |
445 | octet bb[MSGBUFSZ]; | |
446 | uint32 x, y; | |
447 | kludge64 t; | |
448 | buf b; | |
449 | size_t n; | |
450 | ||
451 | n = chunk_read(e, bb); | |
452 | buf_init(&b, bb, n); | |
453 | if (buf_getu16(&b, &f)) choke("missing flags", p); | |
454 | if (buf_getu32(&b, &x)) choke("missing keyid", p); | |
455 | sig_init(s, f, x); | |
456 | if (buf_getu32(&b, &x) || buf_getu32(&b, &y)) | |
457 | choke("missing datestamp", p); | |
458 | SET64(t, x, y); s->t = GET64(time_t, t); | |
f387fcb1 | 459 | if (buf_getdstr16(&b, &s->kh)) |
fa54fe1e | 460 | choke("missing key hash", p); |
461 | if (BLEFT(&b)) | |
462 | choke("junk at end", p); | |
463 | } | |
464 | ||
465 | static void sig_readsig(enc *e, sigmsg *s) | |
466 | { | |
467 | octet bb[MSGBUFSZ]; | |
468 | size_t n; | |
469 | ||
470 | n = chunk_read(e, bb); | |
471 | dstr_putm(&s->sig, bb, n); | |
472 | } | |
473 | ||
474 | /*----- Signing -----------------------------------------------------------*/ | |
475 | ||
476 | static int sign(int argc, char *argv[]) | |
477 | { | |
478 | const char *ef = "binary", *fn = 0, *of = 0, *kn = "ccsig", *err; | |
479 | unsigned f = 0; | |
480 | key_file kf; | |
481 | key *k; | |
482 | sigmsg s; | |
483 | FILE *ofp = 0; | |
484 | int i; | |
485 | char bb[MSGBUFSZ]; | |
486 | size_t n; | |
45c0fd36 | 487 | dstr d = DSTR_INIT; |
fa54fe1e | 488 | const encops *eo; |
489 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; | |
490 | enc *e; | |
491 | ||
492 | for (;;) { | |
493 | static const struct option opt[] = { | |
494 | { "armour", 0, 0, 'a' }, | |
495 | { "armor", 0, 0, 'a' }, | |
496 | { "binary", 0, 0, 'b' }, | |
497 | { "detach", 0, 0, 'd' }, | |
498 | { "key", OPTF_ARGREQ, 0, 'k' }, | |
499 | { "format", OPTF_ARGREQ, 0, 'f' }, | |
500 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
cd6eca43 | 501 | { "progress", 0, 0, 'p' }, |
fa54fe1e | 502 | { "text", 0, 0, 't' }, |
946c3f72 | 503 | { "nocheck", 0, 0, 'C' }, |
fa54fe1e | 504 | { 0, 0, 0, 0 } |
505 | }; | |
cd6eca43 | 506 | i = mdwopt(argc, argv, "k:f:o:abdptC", opt, 0, 0, 0); |
fa54fe1e | 507 | if (i < 0) break; |
508 | switch (i) { | |
509 | case 'k': kn = optarg; break; | |
510 | case 'f': ef = optarg; break; | |
511 | case 'o': of = optarg; break; | |
512 | case 'a': ef = "pem"; break; | |
513 | case 't': f &= ~F_BINARY; break; | |
514 | case 'b': f |= F_BINARY; break; | |
515 | case 'd': f |= F_DETACH; break; | |
946c3f72 | 516 | case 'C': f |= F_NOCHECK; break; |
cd6eca43 | 517 | case 'p': f |= F_PROGRESS; break; |
fa54fe1e | 518 | default: f |= F_BOGUS; break; |
519 | } | |
520 | } | |
521 | if (argc - optind > 1 || (f & F_BOGUS)) | |
522 | die(EXIT_FAILURE, "Usage: sign [-OPTIONS] [FILE]"); | |
523 | ||
213e565f | 524 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
fa54fe1e | 525 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
526 | if ((k = key_bytag(&kf, kn)) == 0) | |
527 | die(EXIT_FAILURE, "key `%s' not found", kn); | |
528 | ||
529 | if ((eo = getenc(ef)) == 0) | |
530 | die(EXIT_FAILURE, "encoding `%s' not found", ef); | |
531 | ||
532 | fn = (optind >= argc) ? 0 : argv[optind++]; | |
533 | ||
534 | if (!of || strcmp(of, "-") == 0) | |
535 | ofp = stdout; | |
536 | else if ((ofp = fopen(of, eo->wmode)) == 0) { | |
537 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
9b1663a5 | 538 | of, strerror(errno)); |
fa54fe1e | 539 | } |
540 | ||
541 | /* --- Start the work --- */ | |
542 | ||
543 | sig_init(&s, f, k->id); | |
544 | dstr_reset(&d); | |
545 | key_fulltag(k, &d); | |
546 | s.s = getsig(k, "ccsig", 1); | |
946c3f72 | 547 | if (!(f & F_NOCHECK) && (err = s.s->ops->check(s.s)) != 0) |
fa54fe1e | 548 | moan("key %s fails check: %s", d.buf, err); |
549 | keyhash(k, s.s, &s.kh); | |
550 | e = initenc(eo, ofp, | |
551 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : | |
552 | (f & F_BINARY) ? "CATSIGN MESSAGE" : | |
553 | "CATSIGN MESSAGE HEADER"); | |
554 | sig_writeheader(e, &s); | |
555 | ||
556 | /* --- Hash the message --- */ | |
557 | ||
558 | mcsetup_readfile(&mc_in, f, fn); | |
559 | mcsetup_write(&mc_out, f, &e); | |
560 | sig_hash(&s); | |
561 | for (;;) { | |
562 | n = mc_in.read(&mc_in, bb); | |
563 | if (!n) break; | |
564 | dohash(s.s->h, bb, n); | |
565 | mc_out.write(&mc_out, bb, n); | |
566 | } | |
567 | mc_endread(&mc_in, 0, 0); | |
568 | mc_endwrite(&mc_out, eo, &e); | |
569 | ||
570 | /* --- Write the signature --- */ | |
571 | ||
572 | if (s.s->ops->doit(s.s, &s.sig)) | |
573 | die(EXIT_FAILURE, "signature failed"); | |
574 | sig_writesig(e, &s); | |
575 | e->ops->encdone(e); | |
576 | if (fflush(ofp) || ferror(ofp) || fclose(ofp)) | |
577 | die(EXIT_FAILURE, "error writing signature: %s", strerror(errno)); | |
578 | ||
579 | /* --- All done --- */ | |
580 | ||
581 | freeenc(e); | |
582 | key_close(&kf); | |
583 | sig_destroy(&s); | |
584 | dstr_destroy(&d); | |
585 | return (0); | |
586 | } | |
587 | ||
588 | /*----- Verifying ---------------------------------------------------------*/ | |
589 | ||
590 | typedef struct vrfctx { | |
591 | unsigned f, m; | |
592 | int verb; | |
593 | const char *what; | |
594 | } vrfctx; | |
595 | ||
596 | static int vrfbdry(const char *b, void *p) | |
597 | { | |
598 | vrfctx *v = p; | |
599 | ||
600 | if (strcmp(b, "CATSIGN MESSAGE") == 0) { | |
601 | v->f |= F_BINARY; | |
602 | v->m |= F_BINARY | F_DETACH; | |
603 | return (1); | |
604 | } else if (strcmp(b, "CATSIGN MESSAGE HEADER") == 0) { | |
605 | v->m |= F_BINARY | F_DETACH; | |
606 | return (1); | |
607 | } else if (strcmp(b, "CATSIGN SIGNATURE") == 0) { | |
608 | v->f |= F_DETACH; | |
609 | v->m |= F_DETACH; | |
610 | return (1); | |
611 | } else | |
612 | return (0); | |
613 | } | |
614 | ||
615 | static void vrfchoke(const char *m, void *p) | |
616 | { | |
617 | vrfctx *v = p; | |
618 | if (v->verb) printf("FAIL %s: %s\n", v->what, m); | |
619 | exit(EXIT_FAILURE); | |
620 | } | |
621 | ||
622 | static int verify(int argc, char *argv[]) | |
623 | { | |
cd6eca43 | 624 | const char *ef = "binary", *of = 0, *fn, *dfn = 0, *kn = 0, *err; |
fa54fe1e | 625 | vrfctx v = { 0, 0, 1 }; |
626 | key_file kf; | |
627 | key *k, *kk = 0; | |
628 | sigmsg s; | |
629 | FILE *fp, *ofp = 0, *rfp = 0; | |
cd6eca43 | 630 | fprogress ff; |
fa54fe1e | 631 | struct tm *tm; |
632 | int i; | |
633 | char bb[MSGBUFSZ]; | |
634 | size_t n; | |
9cea6911 | 635 | time_t t_fresh = 0; |
fa54fe1e | 636 | dstr d = DSTR_INIT, dd = DSTR_INIT; |
637 | const encops *eo; | |
638 | msgcanon mc_in = MC_INIT; | |
639 | enc *e; | |
640 | ||
641 | for (;;) { | |
642 | static const struct option opt[] = { | |
643 | { "armour", 0, 0, 'a' }, | |
644 | { "armor", 0, 0, 'a' }, | |
645 | { "buffer", 0, 0, 'b' }, | |
646 | { "key", OPTF_ARGREQ, 0, 'k' }, | |
647 | { "format", OPTF_ARGREQ, 0, 'f' }, | |
648 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
cd6eca43 | 649 | { "progress", 0, 0, 'p' }, |
fa54fe1e | 650 | { "quiet", 0, 0, 'q' }, |
651 | { "utc", 0, 0, 'u' }, | |
9cea6911 | 652 | { "fresh-time", 0, 0, 't' }, |
fa54fe1e | 653 | { "gmt", 0, 0, 'u' }, |
654 | { "verbose", 0, 0, 'v' }, | |
946c3f72 | 655 | { "nocheck", 0, 0, 'C' }, |
fa54fe1e | 656 | { 0, 0, 0, 0 } |
657 | }; | |
cd6eca43 | 658 | i = mdwopt(argc, argv, "k:f:o:abpqt:uvC", opt, 0, 0, 0); |
fa54fe1e | 659 | if (i < 0) break; |
660 | switch (i) { | |
661 | case 'a': ef = "pem"; break; | |
662 | case 'b': v.f |= F_BUFFER; break; | |
663 | case 'k': kn = optarg; break; | |
664 | case 'f': ef = optarg; break; | |
665 | case 'o': of = optarg; break; | |
666 | case 'u': v.f |= F_UTC; break; | |
946c3f72 | 667 | case 'C': v.f |= F_NOCHECK; break; |
9cea6911 | 668 | case 't': |
669 | if (strcmp(optarg, "always") == 0) t_fresh = 0; | |
45c0fd36 | 670 | else if ((t_fresh = get_date(optarg, 0)) < 0) |
9cea6911 | 671 | die(EXIT_FAILURE, "bad freshness time"); |
672 | break; | |
fa54fe1e | 673 | case 'q': if (v.verb > 0) v.verb--; break; |
674 | case 'v': if (v.verb < 10) v.verb++; break; | |
cd6eca43 | 675 | case 'p': v.f |= F_PROGRESS; break; |
fa54fe1e | 676 | default: v.f |= F_BOGUS; break; |
677 | } | |
678 | } | |
679 | if (argc - optind > 2 || (v.f & F_BOGUS)) | |
680 | die(EXIT_FAILURE, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]"); | |
681 | ||
682 | if ((eo = getenc(ef)) == 0) | |
683 | die(EXIT_FAILURE, "encoding `%s' not found", ef); | |
684 | ||
cd6eca43 MW |
685 | fn = optind < argc ? argv[optind++] : "-"; |
686 | if (strcmp(fn, "-") == 0) | |
fa54fe1e | 687 | fp = stdin; |
cd6eca43 | 688 | else if ((fp = fopen(fn, eo->rmode)) == 0) { |
fa54fe1e | 689 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
cd6eca43 MW |
690 | fn, strerror(errno)); |
691 | } | |
fa54fe1e | 692 | |
213e565f | 693 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
fa54fe1e | 694 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
695 | if (kn && (kk = key_bytag(&kf, kn)) == 0) | |
696 | die(EXIT_FAILURE, "key `%s' not found", kn); | |
697 | ||
698 | e = initdec(eo, fp, vrfbdry, &v); | |
699 | ||
700 | /* --- Read the header chunk --- */ | |
701 | ||
702 | v.what = "malformed header"; | |
703 | sig_readheader(e, &s, vrfchoke, &v); | |
704 | ||
705 | if (((s.f ^ v.f) & v.m) != 0) { | |
706 | if (v.verb) printf("FAIL boundary string inconsistent with contents\n"); | |
707 | exit(EXIT_FAILURE); | |
708 | } | |
709 | v.f |= s.f; | |
710 | ||
711 | if ((k = key_byid(&kf, s.keyid)) == 0) { | |
712 | if (v.verb) printf("FAIL key id %08lx not found\n", | |
713 | (unsigned long)s.keyid); | |
714 | exit(EXIT_FAILURE); | |
715 | } | |
716 | if (kk && k->id != kk->id) { | |
717 | if (v.verb) { | |
718 | dstr_reset(&d); key_fulltag(k, &d); | |
719 | dstr_reset(&dd); key_fulltag(kk, &dd); | |
720 | printf("FAIL signing key is %s; expected key %s\n", d.buf, dd.buf); | |
721 | } | |
722 | exit(EXIT_FAILURE); | |
723 | } | |
724 | ||
725 | s.s = getsig(k, "ccsig", 0); | |
726 | dstr_reset(&d); key_fulltag(k, &d); | |
946c3f72 | 727 | if (!(v.f & F_NOCHECK) && v.verb && (err = s.s->ops->check(s.s)) != 0) |
fa54fe1e | 728 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
729 | ||
730 | dstr_reset(&dd); keyhash(k, s.s, &dd); | |
731 | if (dd.len != s.kh.len || memcmp(dd.buf, s.kh.buf, dd.len) != 0) { | |
732 | if (v.verb) printf("FAIL key hash mismatch\n"); | |
733 | exit(EXIT_FAILURE); | |
45c0fd36 | 734 | } |
fa54fe1e | 735 | |
736 | /* --- Now a merry dance --- */ | |
737 | ||
738 | if (v.f & F_DETACH) | |
739 | sig_readsig(e, &s); | |
740 | if (optind < argc) | |
741 | dfn = argv[optind++]; | |
cd6eca43 | 742 | mcsetup_read(&mc_in, v.f, &e, fn, dfn); |
fa54fe1e | 743 | |
744 | if (!of && (v.f & F_DETACH)) { | |
745 | rfp = ofp = 0; | |
746 | v.f &= ~F_BUFFER; | |
747 | } else if (!of || strcmp(of, "-") == 0) { | |
748 | v.f |= F_BUFFER; | |
749 | ofp = stdout; | |
750 | } | |
751 | if (of && !(v.f & F_BUFFER)) { | |
752 | if ((ofp = fopen(of, (v.f & F_BINARY) ? "wb" : "w")) == 0) { | |
753 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
754 | of, strerror(errno)); | |
755 | } | |
756 | rfp = ofp; | |
757 | } else if ((rfp = tmpfile()) == 0) | |
758 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); | |
759 | ||
760 | /* --- Read the message and verify the signature --- */ | |
761 | ||
762 | sig_hash(&s); | |
763 | for (;;) { | |
764 | n = mc_in.read(&mc_in, bb); | |
765 | if (!n) break; | |
766 | dohash(s.s->h, bb, n); | |
767 | if (rfp) fwrite(bb, 1, n, rfp); | |
768 | } | |
769 | mc_endread(&mc_in, eo, &e); | |
770 | if (!(v.f & F_DETACH)) | |
771 | sig_readsig(e, &s); | |
772 | if (rfp && (ferror(rfp) || fflush(rfp))) { | |
773 | if (v.verb) printf("FAIL error writing message: %s\n", strerror(errno)); | |
774 | exit(EXIT_FAILURE); | |
775 | } | |
776 | ||
777 | /* --- Check the signature --- */ | |
778 | ||
779 | if (s.s->ops->doit(s.s, &s.sig)) { | |
780 | if (v.verb) printf("FAIL signature verification failed\n"); | |
781 | exit(EXIT_FAILURE); | |
782 | } | |
9cea6911 | 783 | if (t_fresh && s.t < t_fresh) { |
784 | if (v.verb) printf("FAIL signature is stale\n"); | |
785 | exit(EXIT_FAILURE); | |
786 | } | |
787 | if (s.t > time(0)) { | |
788 | if (v.verb) printf("FAIL signature timestamp in the future\n"); | |
789 | exit(EXIT_FAILURE); | |
790 | } | |
fa54fe1e | 791 | if (v.verb) { |
792 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); | |
793 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); | |
794 | printf("INFO good-signature %s\n", d.buf); | |
795 | printf("INFO date %s\n", bb); | |
796 | } | |
797 | ||
798 | /* --- Unbuffer buffered input --- */ | |
799 | ||
800 | if (v.f & F_BUFFER) { | |
801 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { | |
802 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
803 | of, strerror(errno)); | |
804 | } | |
805 | rewind(rfp); | |
cd6eca43 | 806 | if (v.f & F_PROGRESS) fprogress_init(&ff, "copying buffer", rfp); |
fa54fe1e | 807 | if (v.verb && ofp == stdout) printf("DATA\n"); |
808 | for (;;) { | |
809 | n = fread(bb, 1, sizeof(bb), rfp); | |
810 | if (!n) break; | |
cd6eca43 MW |
811 | if (v.f & F_PROGRESS) fprogress_update(&ff, n); |
812 | if (fwrite(bb, 1, n, ofp) < n) { | |
813 | if (v.f & F_PROGRESS) fprogress_done(&ff); | |
fa54fe1e | 814 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
cd6eca43 | 815 | } |
fa54fe1e | 816 | } |
cd6eca43 | 817 | if (v.f & F_PROGRESS) fprogress_done(&ff); |
fa54fe1e | 818 | if (ferror(rfp) || fclose(rfp)) |
819 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); | |
820 | } | |
821 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) | |
45c0fd36 | 822 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
fa54fe1e | 823 | |
824 | /* --- Tidy up --- */ | |
825 | ||
826 | e->ops->decdone(e); | |
827 | if (v.verb && ofp != stdout) | |
828 | printf("OK verified successfully\n"); | |
829 | freeenc(e); | |
830 | key_close(&kf); | |
831 | sig_destroy(&s); | |
832 | dstr_destroy(&d); | |
833 | dstr_destroy(&dd); | |
45c0fd36 | 834 | return (0); |
fa54fe1e | 835 | } |
836 | ||
837 | /*----- Reformatting ------------------------------------------------------*/ | |
838 | ||
839 | static int format(int argc, char *argv[]) | |
840 | { | |
841 | const char *ief = "binary", *oef = "binary"; | |
cd6eca43 | 842 | const char *fn, *dfn = 0, *of = 0, *mf = 0; |
fa54fe1e | 843 | sigmsg s; |
844 | FILE *fp, *ofp = 0, *mfp = 0; | |
845 | int i; | |
846 | size_t n; | |
847 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; | |
848 | char bb[MSGBUFSZ]; | |
849 | vrfctx v = { 0, 0, 1 }; | |
850 | unsigned f = 0, fm = ~F_SIGMASK, sf; | |
851 | const encops *ieo, *oeo; | |
852 | enc *ie, *oe; | |
853 | ||
854 | for (;;) { | |
855 | static const struct option opt[] = { | |
856 | { "armour-in", 0, 0, 'a' }, | |
857 | { "armor-in", 0, 0, 'a' }, | |
858 | { "armour-out", 0, 0, 'A' }, | |
859 | { "armor-out", 0, 0, 'A' }, | |
860 | { "detach", 0, 0, 'D' }, | |
861 | { "embed", 0, 0, 'E' }, | |
862 | { "format-in", OPTF_ARGREQ, 0, 'f' }, | |
863 | { "format-out", OPTF_ARGREQ, 0, 'F' }, | |
45c0fd36 MW |
864 | { "message", OPTF_ARGREQ, 0, 'm' }, |
865 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
cd6eca43 | 866 | { "progress", 0, 0, 'p' }, |
fa54fe1e | 867 | { 0, 0, 0, 0 } |
868 | }; | |
cd6eca43 | 869 | i = mdwopt(argc, argv, "f:F:m:o:apADE", opt, 0, 0, 0); |
fa54fe1e | 870 | if (i < 0) break; |
871 | switch (i) { | |
872 | case 'a': ief = "pem"; break; | |
873 | case 'A': oef = "pem"; break; | |
874 | case 'f': ief = optarg; break; | |
875 | case 'F': oef = optarg; break; | |
876 | case 'D': f |= F_DETACH; fm |= F_DETACH; break; | |
877 | case 'E': f &= ~F_DETACH; fm |= F_DETACH; break; | |
878 | case 'm': mf = optarg; break; | |
879 | case 'o': of = optarg; break; | |
cd6eca43 | 880 | case 'p': f |= F_PROGRESS; break; |
fa54fe1e | 881 | default: f |= F_BOGUS; break; |
882 | } | |
883 | } | |
884 | ||
885 | if (argc - optind > 2 || (f & F_BOGUS)) | |
886 | die(EXIT_FAILURE, "Usage: format [-OPTIONS] [FILE [MESSAGE]]"); | |
887 | ||
888 | if ((ieo = getenc(ief)) == 0) | |
889 | die(EXIT_FAILURE, "encoding `%s' not found", ief); | |
890 | if ((oeo = getenc(oef)) == 0) | |
891 | die(EXIT_FAILURE, "encoding `%s' not found", oef); | |
892 | ||
cd6eca43 MW |
893 | fn = optind < argc ? argv[optind++] : "-"; |
894 | if (strcmp(fn, "-") == 0) | |
fa54fe1e | 895 | fp = stdin; |
cd6eca43 | 896 | else if ((fp = fopen(fn, ieo->rmode)) == 0) { |
fa54fe1e | 897 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
cd6eca43 MW |
898 | fn, strerror(errno)); |
899 | } | |
fa54fe1e | 900 | |
901 | if (optind < argc) | |
902 | dfn = argv[optind++]; | |
903 | ||
904 | ie = initdec(ieo, fp, vrfbdry, &v); | |
905 | ||
906 | /* --- Read the header chunk --- */ | |
907 | ||
908 | sig_readheader(ie, &s, diechoke, "malformed header"); | |
909 | ||
910 | if (((s.f ^ v.f) & v.m) != 0) | |
911 | moan("boundary string inconsistent with contents (ignoring)"); | |
45c0fd36 | 912 | |
cd6eca43 | 913 | mcsetup_read(&mc_in, s.f, &ie, fn, dfn); |
fa54fe1e | 914 | |
915 | /* --- Prepare the output stuff --- */ | |
916 | ||
917 | if (!of && !mf) of = "-"; | |
918 | sf = s.f; | |
919 | f = (f & fm) | (s.f & ~fm); | |
920 | s.f = f & F_SIGMASK; | |
921 | ||
922 | if (sf & F_DETACH) | |
923 | sig_readsig(ie, &s); | |
924 | ||
925 | if (!of) | |
926 | mcsetup_writenull(&mc_out); | |
927 | else { | |
928 | if (strcmp(of, "-") == 0) | |
929 | ofp = stdout; | |
930 | else if ((ofp = fopen(of, oeo->wmode)) == 0) { | |
931 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
932 | of, strerror(errno)); | |
933 | } | |
934 | oe = initenc(oeo, ofp, | |
935 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : | |
936 | (f & F_BINARY) ? "CATSIGN MESSAGE" : | |
937 | "CATSIGN MESSAGE HEADER"); | |
938 | sig_writeheader(oe, &s); | |
939 | mcsetup_write(&mc_out, f, &oe); | |
940 | } | |
941 | ||
942 | if (mf) { | |
943 | if (strcmp(mf, "-") == 0) | |
944 | mfp = stdout; | |
945 | else if ((mfp = fopen(mf, (f & F_BINARY) ? "wb" : "w")) == 0) { | |
946 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
947 | mf, strerror(errno)); | |
948 | } | |
949 | } | |
950 | ||
951 | /* --- Wade through the message body --- */ | |
952 | ||
953 | for (;;) { | |
954 | n = mc_in.read(&mc_in, bb); | |
955 | if (!n) break; | |
956 | mc_out.write(&mc_out, bb, n); | |
957 | if (mfp) fwrite(bb, 1, n, mfp); | |
958 | } | |
959 | mc_endread(&mc_in, ieo, &ie); | |
960 | if (of) mc_endwrite(&mc_out, oeo, &oe); | |
961 | ||
962 | /* --- Write the signature --- */ | |
963 | ||
964 | if (!(sf & F_DETACH)) | |
965 | sig_readsig(ie, &s); | |
966 | if (of) { | |
967 | sig_writesig(oe, &s); | |
968 | oe->ops->encdone(oe); | |
969 | } | |
970 | ||
971 | /* --- All done --- */ | |
972 | ||
973 | ie->ops->decdone(ie); | |
974 | if (ferror(fp) || fclose(fp)) | |
975 | die(EXIT_FAILURE, "error reading input signature: %s", strerror(errno)); | |
976 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) | |
977 | die(EXIT_FAILURE, "error writing output signature: %s", strerror(errno)); | |
978 | if (mfp && (fflush(mfp) || ferror(mfp) || fclose(mfp))) | |
979 | die(EXIT_FAILURE, "error writing output message: %s", strerror(errno)); | |
980 | freeenc(ie); | |
981 | if (of) freeenc(oe); | |
982 | sig_destroy(&s); | |
983 | return (0); | |
984 | } | |
985 | ||
986 | static void infochoke(const char *m, void *p) | |
987 | { | |
988 | vrfctx *v = p; | |
989 | printf("BAD %s: %s\n", v->what, m); | |
990 | exit(EXIT_FAILURE); | |
991 | } | |
992 | ||
993 | static void infokeyreport(const char *file, int line, | |
994 | const char *err, void *p) | |
995 | { /*whatever*/; } | |
996 | ||
997 | static int info(int argc, char *argv[]) | |
998 | { | |
999 | const char *ef = "binary"; | |
1000 | vrfctx v = { 0, 0, 1 }; | |
1001 | key_file kf; | |
1002 | key *k; | |
1003 | sigmsg s; | |
1004 | FILE *fp; | |
1005 | int i; | |
1006 | struct tm *tm; | |
1007 | char bb[256]; | |
1008 | dstr d = DSTR_INIT; | |
1009 | const encops *eo; | |
1010 | enc *e; | |
1011 | ||
1012 | for (;;) { | |
1013 | static const struct option opt[] = { | |
1014 | { "armour", 0, 0, 'a' }, | |
1015 | { "armor", 0, 0, 'a' }, | |
1016 | { "format", OPTF_ARGREQ, 0, 'f' }, | |
1017 | { "gmt", 0, 0, 'u' }, | |
1018 | { "utc", 0, 0, 'u' }, | |
1019 | { 0, 0, 0, 0 } | |
1020 | }; | |
1021 | i = mdwopt(argc, argv, "f:au", opt, 0, 0, 0); | |
1022 | if (i < 0) break; | |
1023 | switch (i) { | |
1024 | case 'a': ef = "pem"; break; | |
1025 | case 'f': ef = optarg; break; | |
1026 | case 'u': v.f |= F_UTC; break; | |
1027 | default: v.f |= F_BOGUS; break; | |
1028 | } | |
1029 | } | |
1030 | if (argc - optind > 1 || (v.f & F_BOGUS)) | |
1031 | die(EXIT_FAILURE, "Usage: info [-OPTIONS] [FILE]"); | |
1032 | ||
1033 | if ((eo = getenc(ef)) == 0) | |
1034 | die(EXIT_FAILURE, "encoding `%s' not found", ef); | |
1035 | ||
1036 | if (optind >= argc) | |
1037 | fp = stdin; | |
1038 | else if (strcmp(argv[optind], "-") == 0) { | |
1039 | fp = stdin; | |
1040 | optind++; | |
1041 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { | |
1042 | die(EXIT_FAILURE, "couldn't open file `%s': %s", | |
1043 | argv[optind], strerror(errno)); | |
1044 | } else | |
1045 | optind++; | |
1046 | ||
1047 | if (key_open(&kf, keyring, KOPEN_READ, infokeyreport, 0)) { | |
1048 | printf("NOTE can't open keyring `%s'\n", keyring); | |
1049 | keyring = 0; | |
1050 | } | |
1051 | e = initdec(eo, fp, vrfbdry, &v); | |
1052 | ||
1053 | v.what = "malformed header"; | |
1054 | sig_readheader(e, &s, infochoke, &v); | |
1055 | ||
1056 | printf("INFO flags %sdetach %sbinary\n", | |
1057 | (s.f & F_DETACH) ? "" : "!", | |
1058 | (s.f & F_BINARY) ? "" : "!"); | |
1059 | ||
1060 | if (((s.f ^ v.f) & v.m) != 0) { | |
1061 | printf("WARN boundary string inconsistent with contents\n"); | |
1062 | printf("INFO expected-flags"); | |
1063 | if (v.m & F_DETACH) printf(" %sdetach", (v.f & F_DETACH) ? "" : "!"); | |
1064 | if (v.m & F_BINARY) printf(" %sbinary", (v.f & F_BINARY) ? "" : "!"); | |
1065 | putchar('\n'); | |
1066 | } | |
1067 | v.f |= s.f; | |
1068 | ||
1069 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); | |
1070 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); | |
1071 | printf("INFO date %s\n", bb); | |
1072 | ||
1073 | if (keyring && (k = key_byid(&kf, s.keyid)) != 0) { | |
1074 | dstr_reset(&d); key_fulltag(k, &d); | |
1075 | printf("INFO key %s\n", d.buf); | |
1076 | } else | |
1077 | printf("INFO unknown-key %08lx\n", (unsigned long)s.keyid); | |
1078 | ||
1079 | if (keyring) key_close(&kf); | |
1080 | dstr_destroy(&d); | |
1081 | sig_destroy(&s); | |
1082 | return (0); | |
1083 | } | |
1084 | ||
1085 | /*----- Main code ---------------------------------------------------------*/ | |
1086 | ||
1087 | #define LISTS(LI) \ | |
1088 | LI("Lists", list, \ | |
1089 | listtab[i].name, listtab[i].name) \ | |
1090 | LI("Signature schemes", sig, \ | |
1091 | sigtab[i].name, sigtab[i].name) \ | |
1092 | LI("Encodings", enc, \ | |
1093 | enctab[i].name, enctab[i].name) \ | |
1094 | LI("Hash functions", hash, \ | |
1095 | ghashtab[i], ghashtab[i]->name) | |
1096 | ||
1097 | MAKELISTTAB(listtab, LISTS) | |
1098 | ||
1099 | int cmd_show(int argc, char *argv[]) | |
1100 | { | |
1101 | return (displaylists(listtab, argv + 1)); | |
1102 | } | |
1103 | ||
1104 | static int cmd_help(int, char **); | |
1105 | ||
1106 | static cmd cmdtab[] = { | |
1107 | { "help", cmd_help, "help [COMMAND...]" }, | |
1108 | { "show", cmd_show, "show [ITEM...]" }, | |
1109 | CMD_ENCODE, | |
1110 | CMD_DECODE, | |
1111 | { "sign", sign, | |
cd6eca43 | 1112 | "sign [-adptC] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
fa54fe1e | 1113 | Options:\n\ |
1114 | \n\ | |
1115 | -a, --armour Same as `-f pem'.\n\ | |
1116 | -b, --binary Treat the input message as binary data.\n\ | |
1117 | -d, --detach Produce a detached signature.\n\ | |
1118 | -f, --format=FORMAT Encode as FORMAT.\n\ | |
1119 | -k, --key=TAG Use public encryption key named by TAG.\n\ | |
1120 | -o, --output=FILE Write output to FILE.\n\ | |
cd6eca43 | 1121 | -p, --progress Show progress on large files.\n\ |
fa54fe1e | 1122 | -t, --text Canonify input message as a text file.\n\ |
946c3f72 | 1123 | -C, --nocheck Don't check the private key.\n\ |
fa54fe1e | 1124 | " }, |
1125 | { "verify", verify, | |
cd6eca43 | 1126 | "verify [-abpquvC] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\ |
fa54fe1e | 1127 | [FILE [MESSAGE]]", "\ |
1128 | Options:\n\ | |
1129 | \n\ | |
1130 | -a, --armour Same as `-f pem'.\n\ | |
1131 | -b, --buffer Buffer message until signature is verified.\n\ | |
1132 | -f, --format=FORMAT Decode as FORMAT.\n\ | |
1133 | -k, --key=TAG Require that the message be signed by key TAG.\n\ | |
1134 | -o, --output=FILE Write message to FILE.\n\ | |
cd6eca43 | 1135 | -p, --progress Show progress on large files.\n\ |
fa54fe1e | 1136 | -q, --quiet Produce fewer messages.\n\ |
9cea6911 | 1137 | -t, --freshtime=TIME Only accept signatures made after this time.\n\ |
fa54fe1e | 1138 | -u, --utc Show dates in UTC rather than local time.\n\ |
1139 | -v, --verbose Produce more verbose messages.\n\ | |
946c3f72 | 1140 | -C, --nocheck Don't check the public key.\n\ |
fa54fe1e | 1141 | " }, |
1142 | { "info", info, | |
1143 | "info [-au] [-f FORMAT] [FILE]", "\ | |
1144 | Options:\n\ | |
1145 | \n\ | |
1146 | -a, --armour Same as `-f pem'.\n\ | |
1147 | -f, --format=FORMAT Decode as FORMAT.\n\ | |
1148 | -u, --utc Show dates in UTC rather than local time.\n\ | |
1149 | "}, | |
1150 | { "format", format, | |
cd6eca43 | 1151 | "format [-apuADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\ |
fa54fe1e | 1152 | [FILE [MESSAGE]]", "\ |
1153 | Options:\n\ | |
1154 | \n\ | |
1155 | -a, --armour-in Same as `-f pem'.\n\ | |
1156 | -A, --armour-out Same as `-F pem'.\n\ | |
1157 | -D, --detach Create detached signature.\n\ | |
1158 | -E, --embed Create signature with embedded message.\n\ | |
1159 | -f, --format-in=FORMAT Decode input as FORMAT.\n\ | |
1160 | -F, --format-out=FORMAT Encode output as FORMAT.\n\ | |
1161 | -m, --message=FILE Write message to FILE.\n\ | |
1162 | -o, --output=FILE Write new signature to FILE.\n\ | |
cd6eca43 | 1163 | -p, --progress Show progress on large files.\n\ |
fa54fe1e | 1164 | "}, |
1165 | { 0, 0, 0 } | |
1166 | }; /* " Emacs seems confused. */ | |
1167 | ||
1168 | static int cmd_help(int argc, char **argv) | |
1169 | { | |
1170 | sc_help(cmdtab, stdout, argv + 1); | |
1171 | return (0); | |
1172 | } | |
1173 | ||
1174 | void version(FILE *fp) | |
1175 | { | |
1176 | pquis(fp, "$, Catacomb version " VERSION "\n"); | |
1177 | } | |
1178 | ||
1179 | static void usage(FILE *fp) | |
1180 | { | |
1181 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); | |
1182 | } | |
1183 | ||
1184 | void help_global(FILE *fp) | |
1185 | { | |
1186 | usage(fp); | |
1187 | fputs("\n\ | |
1188 | Sign and verify data.\n\ | |
1189 | \n\ | |
1190 | Global command-line options:\n\ | |
1191 | \n\ | |
1192 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ | |
1193 | -v, --version Show program version number.\n\ | |
1194 | -u, --usage Show a terse usage message.\n\ | |
1195 | \n\ | |
1196 | -k, --keyring=FILE Read keys from FILE.\n", | |
1197 | fp); | |
1198 | } | |
1199 | ||
1200 | /* --- @main@ --- * | |
1201 | * | |
1202 | * Arguments: @int argc@ = number of command line arguments | |
1203 | * @char *argv[]@ = vector of command line arguments | |
1204 | * | |
1205 | * Returns: Zero if successful, nonzero otherwise. | |
1206 | * | |
1207 | * Use: Encrypts or decrypts files. | |
1208 | */ | |
1209 | ||
1210 | int main(int argc, char *argv[]) | |
1211 | { | |
1212 | unsigned f = 0; | |
1213 | ||
1214 | #define f_bogus 1u | |
1215 | ||
1216 | /* --- Initialize the library --- */ | |
1217 | ||
1218 | ego(argv[0]); | |
1219 | sub_init(); | |
1220 | rand_noisesrc(RAND_GLOBAL, &noise_source); | |
1221 | rand_seed(RAND_GLOBAL, 160); | |
fa54fe1e | 1222 | |
1223 | /* --- Parse options --- */ | |
1224 | ||
1225 | for (;;) { | |
1226 | static struct option opts[] = { | |
1227 | { "help", 0, 0, 'h' }, | |
1228 | { "version", 0, 0, 'v' }, | |
1229 | { "usage", 0, 0, 'u' }, | |
1230 | { "keyring", OPTF_ARGREQ, 0, 'k' }, | |
1231 | { 0, 0, 0, 0 } | |
1232 | }; | |
1233 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); | |
1234 | if (i < 0) | |
1235 | break; | |
1236 | switch (i) { | |
1237 | case 'h': | |
1238 | sc_help(cmdtab, stdout, argv + optind); | |
1239 | exit(0); | |
1240 | break; | |
1241 | case 'v': | |
1242 | version(stdout); | |
1243 | exit(0); | |
1244 | break; | |
1245 | case 'u': | |
1246 | usage(stdout); | |
1247 | exit(0); | |
1248 | case 'k': | |
1249 | keyring = optarg; | |
1250 | break; | |
1251 | default: | |
1252 | f |= f_bogus; | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | argc -= optind; | |
1258 | argv += optind; | |
1259 | optind = 0; | |
1260 | if (f & f_bogus || argc < 1) { | |
1261 | usage(stderr); | |
1262 | exit(EXIT_FAILURE); | |
1263 | } | |
1264 | ||
1265 | /* --- Dispatch to the correct subcommand handler --- */ | |
1266 | ||
1267 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); | |
1268 | ||
1269 | #undef f_bogus | |
1270 | } | |
1271 | ||
1272 | /*----- That's all, folks -------------------------------------------------*/ |