5c3f75ec |
1 | /* -*-c-*- |
2 | * |
c65df279 |
3 | * $Id$ |
5c3f75ec |
4 | * |
5 | * Command-line encryption tool |
6 | * |
7 | * (c) 2004 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 <errno.h> |
35 | #include <stdio.h> |
36 | #include <stdlib.h> |
37 | #include <string.h> |
38 | |
39 | #include <mLib/base64.h> |
40 | #include <mLib/dstr.h> |
41 | #include <mLib/mdwopt.h> |
42 | #include <mLib/quis.h> |
43 | #include <mLib/report.h> |
44 | #include <mLib/sub.h> |
45 | |
46 | #include "buf.h" |
47 | #include "rand.h" |
48 | #include "noise.h" |
49 | #include "mprand.h" |
50 | #include "key.h" |
51 | #include "cc.h" |
52 | |
c65df279 |
53 | #include "ectab.h" |
54 | #include "ptab.h" |
55 | |
5c3f75ec |
56 | /*----- Utilities ---------------------------------------------------------*/ |
57 | |
58 | /* --- @keyreport@ --- * |
59 | * |
60 | * Arguments: @const char *file@ = filename containing the error |
61 | * @int line@ = line number in file |
62 | * @const char *err@ = error text message |
63 | * @void *p@ = unimportant pointer |
64 | * |
65 | * Returns: --- |
66 | * |
67 | * Use: Reports errors during the opening of a key file. |
68 | */ |
69 | |
70 | static void keyreport(const char *file, int line, const char *err, void *p) |
71 | { |
72 | moan("error in keyring `%s' at line `%s': %s", file, line, err); |
73 | } |
74 | |
75 | /*----- Static variables --------------------------------------------------*/ |
76 | |
77 | static const char *keyring = "keyring"; |
78 | |
79 | /*----- Data format -------------------------------------------------------*/ |
80 | |
81 | /* --- Overview --- * |
82 | * |
83 | * The encrypted message is divided into chunks, each preceded by a two-octet |
84 | * length. The chunks don't need to be large -- the idea is that we can |
85 | * stream the chunks in and out. |
86 | * |
87 | * The first chunk is a header. It contains the decryption key-id, and maybe |
88 | * the verification key-id if the message is signed. |
89 | * |
90 | * Next comes the key-encapsulation chunk. This is decrypted in some |
91 | * KEM-specific way to yield a secret hash. This hash is what is signed if |
92 | * the message is signed. The hash is expanded using an MGF (or similar) to |
93 | * make a symmetric encryption and MAC key. |
94 | * |
95 | * If the message is signed, there comes a signature chunk. The signature is |
96 | * on the secret hash. This means that the recipient can modify the message |
97 | * and still have a valid signature, so it's not useful for proving things to |
98 | * other people; but it also means that the recipient knows that the message |
99 | * is from someone who knows the hash, which limits the possiblities to (a) |
100 | * whoever encrypted the message (good!) and (b) whoever knows the |
101 | * recipient's private key. |
102 | * |
103 | * Then come message chunks. Each one begins with a MAC over an implicit |
104 | * sequence number and the ciphertext. The final chunk's ciphertext is |
105 | * empty; no other chunk is empty. Thus can the correct end-of-file be |
106 | * discerned. |
107 | */ |
108 | |
109 | /*----- Chunk I/O ---------------------------------------------------------*/ |
110 | |
111 | static void chunk_write(enc *e, buf *b) |
112 | { |
113 | octet l[2]; |
114 | size_t n = BLEN(b); |
115 | assert(n <= MASK16); |
116 | STORE16(l, n); |
117 | if (e->ops->write(e, l, 2) || |
118 | e->ops->write(e, BBASE(b), BLEN(b))) |
119 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
120 | } |
121 | |
122 | static void chunk_read(enc *e, dstr *d, buf *b) |
123 | { |
124 | octet l[2]; |
125 | size_t n; |
126 | |
127 | dstr_reset(d); |
128 | errno = 0; |
129 | if (e->ops->read(e, l, 2) != 2) |
130 | goto err; |
131 | n = LOAD16(l); |
132 | dstr_ensure(d, n); |
133 | if (e->ops->read(e, d->buf, n) != n) |
134 | goto err; |
135 | d->len = n; |
136 | buf_init(b, d->buf, d->len); |
137 | return; |
138 | |
139 | err: |
140 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); |
141 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
142 | } |
143 | |
144 | /*----- Encryption --------------------------------------------------------*/ |
145 | |
146 | static int encrypt(int argc, char *argv[]) |
147 | { |
c65df279 |
148 | const char *of = 0, *kn = "ccrypt", *skn = 0; |
5c3f75ec |
149 | FILE *ofp = 0; |
150 | FILE *fp = 0; |
151 | const char *ef = "binary"; |
152 | const char *err; |
153 | int i; |
c65df279 |
154 | int en; |
5c3f75ec |
155 | size_t n; |
156 | dstr d = DSTR_INIT; |
157 | octet *tag, *ct; |
158 | buf b; |
159 | size_t seq; |
160 | char bb[16384]; |
161 | unsigned f = 0; |
162 | key_file kf; |
163 | key *k; |
c65df279 |
164 | key *sk = 0; |
5c3f75ec |
165 | kem *km; |
c65df279 |
166 | sig *s = 0; |
5c3f75ec |
167 | gcipher *cx, *c; |
168 | gmac *m; |
169 | ghash *h; |
170 | const encops *eo; |
171 | enc *e; |
172 | |
173 | #define f_bogus 1u |
174 | |
175 | for (;;) { |
176 | static const struct option opt[] = { |
177 | { "key", OPTF_ARGREQ, 0, 'k' }, |
c65df279 |
178 | { "sign-key", OPTF_ARGREQ, 0, 's' }, |
5c3f75ec |
179 | { "armour", 0, 0, 'a' }, |
180 | { "armor", 0, 0, 'a' }, |
181 | { "format", OPTF_ARGREQ, 0, 'f' }, |
182 | { "output", OPTF_ARGREQ, 0, 'o' }, |
183 | { 0, 0, 0, 0 } |
184 | }; |
c65df279 |
185 | i = mdwopt(argc, argv, "k:s:af:o:", opt, 0, 0, 0); |
5c3f75ec |
186 | if (i < 0) break; |
187 | switch (i) { |
188 | case 'k': kn = optarg; break; |
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189 | case 's': skn = optarg; break; |
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190 | case 'a': ef = "pem"; break; |
191 | case 'f': ef = optarg; break; |
192 | case 'o': of = optarg; break; |
193 | default: f |= f_bogus; break; |
194 | } |
195 | } |
196 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
197 | die(EXIT_FAILURE, "Usage: encrypt [-OPTIONS] [FILE]"); |
5c3f75ec |
198 | |
199 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
200 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
201 | if ((k = key_bytag(&kf, kn)) == 0) |
202 | die(EXIT_FAILURE, "key `%s' not found", kn); |
c65df279 |
203 | if (skn && (sk = key_bytag(&kf, skn)) == 0) |
204 | die(EXIT_FAILURE, "key `%s' not found", skn); |
5c3f75ec |
205 | |
206 | if ((eo = getenc(ef)) == 0) |
207 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
208 | |
209 | if (optind == argc) |
210 | fp = stdin; |
211 | else if (strcmp(argv[optind], "-") == 0) { |
212 | fp = stdin; |
213 | optind++; |
214 | } else if ((fp = fopen(argv[optind], "rb")) == 0) { |
215 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
216 | argv[optind], strerror(errno)); |
217 | } else |
218 | optind++; |
219 | |
220 | if (!of || strcmp(of, "-") == 0) |
221 | ofp = stdout; |
222 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
223 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
224 | ofp, strerror(errno)); |
225 | } |
226 | |
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227 | dstr_reset(&d); |
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228 | key_fulltag(k, &d); |
229 | e = initenc(eo, ofp, "CATCRYPT ENCRYPTED MESSAGE", 1); |
c65df279 |
230 | km = getkem(k, "cckem", 0); |
5c3f75ec |
231 | if ((err = km->ops->check(km)) != 0) |
232 | moan("key `%s' fails check: %s", d.buf, err); |
c65df279 |
233 | if (sk) { |
234 | dstr_reset(&d); |
235 | key_fulltag(sk, &d); |
236 | s = getsig(sk, "ccsig", 1); |
237 | if ((err = s->ops->check(s)) != 0) |
238 | moan("key `%s' fails check: %s", d.buf, err); |
239 | } |
5c3f75ec |
240 | |
241 | /* --- Build the header chunk --- */ |
242 | |
243 | dstr_reset(&d); |
244 | dstr_ensure(&d, 256); |
245 | buf_init(&b, d.buf, 256); |
246 | buf_putu32(&b, k->id); |
c65df279 |
247 | if (sk) buf_putu32(&b, sk->id); |
5c3f75ec |
248 | assert(BOK(&b)); |
249 | chunk_write(e, &b); |
250 | |
251 | /* --- Build the KEM chunk --- */ |
252 | |
253 | dstr_reset(&d); |
254 | if (setupkem(km, &d, &cx, &c, &m)) |
255 | die(EXIT_FAILURE, "failed to encapsulate key"); |
256 | buf_init(&b, d.buf, d.len); |
257 | BSTEP(&b, d.len); |
258 | chunk_write(e, &b); |
259 | |
c65df279 |
260 | /* --- Write the signature chunk --- */ |
261 | |
262 | if (s) { |
263 | GC_ENCRYPT(cx, 0, bb, 1024); |
264 | GH_HASH(s->h, bb, 1024); |
265 | dstr_reset(&d); |
266 | if ((en = s->ops->doit(s, &d)) != 0) |
267 | die(EXIT_FAILURE, "error creating signature: %s", key_strerror(en)); |
268 | buf_init(&b, d.buf, d.len); |
269 | BSTEP(&b, d.len); |
270 | chunk_write(e, &b); |
271 | } |
272 | |
5c3f75ec |
273 | /* --- Now do the main crypto --- */ |
274 | |
275 | assert(GC_CLASS(c)->blksz <= sizeof(bb)); |
276 | dstr_ensure(&d, sizeof(bb) + GM_CLASS(m)->hashsz); |
277 | seq = 0; |
278 | for (;;) { |
279 | h = GM_INIT(m); |
280 | STORE32(bb, seq); |
281 | GH_HASH(h, bb, 4); |
282 | seq++; |
283 | if (GC_CLASS(c)->blksz) { |
284 | GC_ENCRYPT(cx, 0, bb, GC_CLASS(c)->blksz); |
285 | GC_SETIV(c, bb); |
286 | } |
287 | n = fread(bb, 1, sizeof(bb), fp); |
288 | if (!n) break; |
289 | buf_init(&b, d.buf, d.sz); |
290 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
291 | ct = buf_get(&b, n); |
292 | assert(tag); assert(ct); |
293 | GC_ENCRYPT(c, bb, ct, n); |
294 | GH_HASH(h, ct, n); |
295 | GH_DONE(h, tag); |
296 | GH_DESTROY(h); |
297 | chunk_write(e, &b); |
298 | } |
299 | |
300 | /* --- Final terminator packet --- */ |
301 | |
302 | buf_init(&b, d.buf, d.sz); |
303 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
304 | assert(tag); |
305 | GH_DONE(h, tag); |
306 | GH_DESTROY(h); |
307 | chunk_write(e, &b); |
308 | |
309 | /* --- All done --- */ |
310 | |
311 | e->ops->encdone(e); |
312 | GM_DESTROY(m); |
313 | GC_DESTROY(c); |
314 | GC_DESTROY(cx); |
315 | freeenc(e); |
c65df279 |
316 | if (s) freesig(s); |
5c3f75ec |
317 | freekem(km); |
318 | if (of) fclose(ofp); |
319 | key_close(&kf); |
320 | dstr_destroy(&d); |
321 | return (0); |
322 | |
323 | #undef f_bogus |
324 | } |
325 | |
326 | /*---- Decryption ---------------------------------------------------------*/ |
327 | |
328 | static int decrypt(int argc, char *argv[]) |
329 | { |
330 | const char *of = 0; |
331 | FILE *ofp = 0; |
332 | FILE *fp = 0; |
333 | const char *ef = "binary"; |
334 | int i; |
335 | dstr d = DSTR_INIT; |
336 | buf b; |
337 | key_file kf; |
338 | size_t seq; |
339 | uint32 id; |
340 | key *k; |
c65df279 |
341 | key *sk = 0; |
5c3f75ec |
342 | kem *km; |
c65df279 |
343 | sig *s = 0; |
5c3f75ec |
344 | gcipher *cx; |
345 | gcipher *c; |
346 | ghash *h; |
347 | gmac *m; |
348 | octet *tag; |
349 | unsigned f = 0; |
350 | const encops *eo; |
c65df279 |
351 | const char *err; |
352 | int verb = 1; |
5c3f75ec |
353 | enc *e; |
354 | |
355 | #define f_bogus 1u |
356 | |
357 | for (;;) { |
358 | static const struct option opt[] = { |
359 | { "armour", 0, 0, 'a' }, |
360 | { "armor", 0, 0, 'a' }, |
c65df279 |
361 | { "verbose", 0, 0, 'v' }, |
362 | { "quiet", 0, 0, 'q' }, |
5c3f75ec |
363 | { "format", OPTF_ARGREQ, 0, 'f' }, |
364 | { "output", OPTF_ARGREQ, 0, 'o' }, |
365 | { 0, 0, 0, 0 } |
366 | }; |
c65df279 |
367 | i = mdwopt(argc, argv, "af:o:qv", opt, 0, 0, 0); |
5c3f75ec |
368 | if (i < 0) break; |
369 | switch (i) { |
370 | case 'a': ef = "pem"; break; |
c65df279 |
371 | case 'v': verb++; break; |
372 | case 'q': if (verb) verb--; break; |
5c3f75ec |
373 | case 'f': ef = optarg; break; |
374 | case 'o': of = optarg; break; |
375 | default: f |= f_bogus; break; |
376 | } |
377 | } |
378 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
379 | die(EXIT_FAILURE, "Usage: decrypt [-OPTIONS] [FILE]"); |
5c3f75ec |
380 | |
381 | if ((eo = getenc(ef)) == 0) |
382 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
383 | |
384 | if (optind == argc) |
385 | fp = stdin; |
386 | else if (strcmp(argv[optind], "-") == 0) { |
387 | fp = stdin; |
388 | optind++; |
389 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
390 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
391 | argv[optind], strerror(errno)); |
392 | } else |
393 | optind++; |
394 | |
395 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
396 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
397 | |
398 | e = initenc(eo, fp, "CATCRYPT ENCRYPTED MESSAGE", 0); |
399 | |
400 | /* --- Read the header chunk --- */ |
401 | |
402 | chunk_read(e, &d, &b); |
c65df279 |
403 | if (buf_getu32(&b, &id)) { |
404 | if (verb) printf("FAIL malformed header: missing keyid\n"); |
405 | exit(EXIT_FAILURE); |
406 | } |
407 | if ((k = key_byid(&kf, id)) == 0) { |
408 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
409 | exit(EXIT_FAILURE); |
410 | } |
411 | if (BLEFT(&b)) { |
412 | if (buf_getu32(&b, &id)) { |
413 | if (verb) printf("FAIL malformed header: missing signature keyid\n"); |
414 | exit(EXIT_FAILURE); |
415 | } |
416 | if ((sk = key_byid(&kf, id)) == 0) { |
417 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
418 | exit(EXIT_FAILURE); |
419 | } |
420 | } |
421 | if (BLEFT(&b)) { |
422 | if (verb) printf("FAIL malformed header: junk at end\n"); |
423 | exit(EXIT_FAILURE); |
424 | } |
5c3f75ec |
425 | |
426 | /* --- Find the key --- */ |
427 | |
c65df279 |
428 | km = getkem(k, "cckem", 1); |
5c3f75ec |
429 | |
430 | /* --- Read the KEM chunk --- */ |
431 | |
432 | chunk_read(e, &d, &b); |
c65df279 |
433 | if (setupkem(km, &d, &cx, &c, &m)) { |
434 | if (verb) printf("FAIL failed to decapsulate key\n"); |
435 | exit(EXIT_FAILURE); |
436 | } |
437 | |
438 | /* --- Verify the signature, if there is one --- */ |
439 | |
440 | if (sk) { |
441 | s = getsig(sk, "ccsig", 0); |
442 | dstr_reset(&d); |
443 | key_fulltag(sk, &d); |
444 | if (verb && (err = s->ops->check(s)) != 0) |
445 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
446 | dstr_reset(&d); |
447 | dstr_ensure(&d, 1024); |
448 | GC_ENCRYPT(cx, 0, d.buf, 1024); |
449 | GH_HASH(s->h, d.buf, 1024); |
450 | chunk_read(e, &d, &b); |
451 | if (s->ops->doit(s, &d)) { |
452 | if (verb) printf("FAIL signature verification failed\n"); |
453 | exit(EXIT_FAILURE); |
454 | } |
455 | if (verb) { |
456 | dstr_reset(&d); |
457 | key_fulltag(sk, &d); |
458 | printf("INFO good signature from %s\n", d.buf); |
459 | } |
460 | } else if (verb) |
461 | printf("INFO no signature packet\n"); |
5c3f75ec |
462 | |
463 | /* --- Now decrypt the main body --- */ |
464 | |
c65df279 |
465 | if (!of || strcmp(of, "-") == 0) { |
5c3f75ec |
466 | ofp = stdout; |
c65df279 |
467 | if (verb) printf("DATA\n"); |
468 | } else if ((ofp = fopen(of, "wb")) == 0) { |
5c3f75ec |
469 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
470 | ofp, strerror(errno)); |
471 | } |
472 | |
473 | seq = 0; |
474 | dstr_ensure(&d, GC_CLASS(c)->blksz); |
475 | dstr_ensure(&d, 4); |
476 | for (;;) { |
477 | if (GC_CLASS(c)->blksz) { |
478 | GC_ENCRYPT(cx, 0, d.buf, GC_CLASS(c)->blksz); |
479 | GC_SETIV(c, d.buf); |
480 | } |
481 | h = GM_INIT(m); |
482 | STORE32(d.buf, seq); |
483 | GH_HASH(h, d.buf, 4); |
484 | seq++; |
485 | chunk_read(e, &d, &b); |
c65df279 |
486 | if ((tag = buf_get(&b, GM_CLASS(m)->hashsz)) == 0) { |
487 | if (verb) printf("%sFAIL bad ciphertext chunk: no tag\n", |
488 | ofp == stdout ? "\n" : ""); |
489 | exit(EXIT_FAILURE); |
490 | } |
5c3f75ec |
491 | GH_HASH(h, BCUR(&b), BLEFT(&b)); |
c65df279 |
492 | if (memcmp(tag, GH_DONE(h, 0), GM_CLASS(m)->hashsz) != 0) { |
493 | if (verb) |
494 | printf("%sFAIL bad ciphertext chunk: authentication failure\n", |
495 | ofp == stdout ? "\n" : ""); |
496 | exit(EXIT_FAILURE); |
497 | } |
5c3f75ec |
498 | if (!BLEFT(&b)) |
499 | break; |
500 | GC_DECRYPT(c, BCUR(&b), BCUR(&b), BLEFT(&b)); |
c65df279 |
501 | if (fwrite(BCUR(&b), 1, BLEFT(&b), ofp) != BLEFT(&b)) { |
502 | if (verb) printf("%sFAIL error writing output: %s\n", |
503 | ofp == stdout ? "\n" : "", strerror(errno)); |
504 | exit(EXIT_FAILURE); |
505 | } |
506 | } |
507 | |
508 | if (fflush(ofp) || ferror(ofp)) { |
509 | if (verb) printf("%sFAIL error writing output: %s\n", |
510 | ofp == stdout ? "\n" : "", strerror(errno)); |
511 | exit(EXIT_FAILURE); |
5c3f75ec |
512 | } |
513 | |
5c3f75ec |
514 | e->ops->decdone(e); |
c65df279 |
515 | if (verb && ofp != stdout) |
516 | printf("OK decrypted successfully\n"); |
5c3f75ec |
517 | freeenc(e); |
518 | GC_DESTROY(c); |
519 | GC_DESTROY(cx); |
520 | GM_DESTROY(m); |
521 | freekem(km); |
522 | if (of) fclose(ofp); |
523 | key_close(&kf); |
524 | dstr_destroy(&d); |
525 | return (0); |
526 | |
527 | #undef f_bogus |
528 | } |
529 | |
530 | /*----- Test code ---------------------------------------------------------*/ |
531 | |
532 | static int encode(int argc, char *argv[]) |
533 | { |
534 | const char *of = 0; |
535 | FILE *ofp = 0; |
536 | FILE *fp = 0; |
537 | const char *ef = "binary"; |
538 | const char *bd = "MESSAGE"; |
539 | int i; |
540 | size_t n; |
541 | char buf[4096]; |
542 | unsigned f = 0; |
543 | const encops *eo; |
544 | enc *e; |
545 | |
546 | #define f_bogus 1u |
547 | |
548 | for (;;) { |
549 | static const struct option opt[] = { |
550 | { "format", OPTF_ARGREQ, 0, 'f' }, |
551 | { "boundary", OPTF_ARGREQ, 0, 'b' }, |
552 | { "output", OPTF_ARGREQ, 0, 'o' }, |
553 | { 0, 0, 0, 0 } |
554 | }; |
555 | i = mdwopt(argc, argv, "f:b:o:", opt, 0, 0, 0); |
556 | if (i < 0) break; |
557 | switch (i) { |
558 | case 'f': ef = optarg; break; |
559 | case 'b': bd = optarg; break; |
560 | case 'o': of = optarg; break; |
561 | default: f |= f_bogus; break; |
562 | } |
563 | } |
564 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
565 | die(EXIT_FAILURE, "Usage: encode [-OPTIONS] [FILE]"); |
5c3f75ec |
566 | |
567 | if ((eo = getenc(ef)) == 0) |
568 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
569 | |
570 | if (optind == argc) |
571 | fp = stdin; |
572 | else if (strcmp(argv[optind], "-") == 0) { |
573 | fp = stdin; |
574 | optind++; |
575 | } else if ((fp = fopen(argv[optind], "rb")) == 0) { |
576 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
577 | argv[optind], strerror(errno)); |
578 | } else |
579 | optind++; |
580 | |
581 | if (!of || strcmp(of, "-") == 0) |
582 | ofp = stdout; |
583 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
584 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
585 | ofp, strerror(errno)); |
586 | } |
587 | |
588 | e = initenc(eo, ofp, bd, 1); |
589 | |
590 | do { |
591 | n = fread(buf, 1, sizeof(buf), fp); |
592 | if (e->ops->write(e, buf, n)) |
593 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
594 | } while (n == sizeof(buf)); |
595 | e->ops->encdone(e); |
596 | freeenc(e); |
597 | return (0); |
598 | |
599 | #undef f_bogus |
600 | } |
601 | |
602 | static int decode(int argc, char *argv[]) |
603 | { |
604 | const char *of = 0; |
605 | FILE *ofp = 0; |
606 | FILE *fp = 0; |
607 | const char *ef = "binary"; |
608 | const char *bd = 0; |
609 | int i; |
610 | char buf[4096]; |
611 | unsigned f = 0; |
612 | const encops *eo; |
613 | enc *e; |
614 | |
615 | #define f_bogus 1u |
616 | |
617 | for (;;) { |
618 | static const struct option opt[] = { |
619 | { "format", OPTF_ARGREQ, 0, 'f' }, |
620 | { "boundary", OPTF_ARGREQ, 0, 'b' }, |
621 | { "output", OPTF_ARGREQ, 0, 'o' }, |
622 | { 0, 0, 0, 0 } |
623 | }; |
624 | i = mdwopt(argc, argv, "f:b:o:", opt, 0, 0, 0); |
625 | if (i < 0) break; |
626 | switch (i) { |
627 | case 'f': ef = optarg; break; |
628 | case 'b': bd = optarg; break; |
629 | case 'o': of = optarg; break; |
630 | default: f |= f_bogus; break; |
631 | } |
632 | } |
633 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
634 | die(EXIT_FAILURE, "Usage: decode [-OPTIONS] [FILE]"); |
5c3f75ec |
635 | |
636 | if ((eo = getenc(ef)) == 0) |
637 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
638 | |
639 | if (optind == argc) |
640 | fp = stdin; |
641 | else if (strcmp(argv[optind], "-") == 0) { |
642 | fp = stdin; |
643 | optind++; |
644 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
645 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
646 | argv[optind], strerror(errno)); |
647 | } else |
648 | optind++; |
649 | |
650 | if (!of || strcmp(of, "-") == 0) |
651 | ofp = stdout; |
652 | else if ((ofp = fopen(of, "wb")) == 0) { |
653 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
654 | ofp, strerror(errno)); |
655 | } |
656 | |
657 | e = initenc(eo, fp, bd, 0); |
658 | |
659 | do { |
660 | if ((i = e->ops->read(e, buf, sizeof(buf))) < 0) |
661 | die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
662 | if (fwrite(buf, 1, i, ofp) < i) |
663 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
664 | } while (i == sizeof(buf)); |
665 | e->ops->decdone(e); |
666 | freeenc(e); |
667 | return (0); |
668 | |
669 | #undef f_bogus |
670 | } |
671 | |
672 | /*----- Main code ---------------------------------------------------------*/ |
673 | |
c65df279 |
674 | #define LISTS(LI) \ |
675 | LI("Lists", list, \ |
676 | listtab[i].name, listtab[i].name) \ |
677 | LI("Key-encapsulation mechanisms", kem, \ |
678 | kemtab[i].name, kemtab[i].name) \ |
679 | LI("Signature schemes", sig, \ |
680 | sigtab[i].name, sigtab[i].name) \ |
681 | LI("Encodings", enc, \ |
682 | enctab[i].name, enctab[i].name) \ |
683 | LI("Symmetric encryption algorithms", cipher, \ |
684 | gciphertab[i], gciphertab[i]->name) \ |
685 | LI("Hash functions", hash, \ |
686 | ghashtab[i], ghashtab[i]->name) \ |
687 | LI("Message authentication codes", mac, \ |
688 | gmactab[i], gmactab[i]->name) |
689 | |
690 | MAKELISTTAB(listtab, LISTS) |
691 | |
692 | int cmd_show(int argc, char *argv[]) |
693 | { |
694 | return (displaylists(listtab, argv + 1)); |
695 | } |
696 | |
697 | static int cmd_help(int, char **); |
5c3f75ec |
698 | |
699 | static cmd cmdtab[] = { |
c65df279 |
700 | { "help", cmd_help, "help [COMMAND...]" }, |
701 | { "show", cmd_show, "show [ITEM...]" }, |
5c3f75ec |
702 | { "encode", encode, |
c65df279 |
703 | "encode [-f FORMAT] [-b LABEL] [-o OUTPUT] [FILE]", |
5c3f75ec |
704 | "\ |
705 | Options:\n\ |
706 | \n\ |
707 | -f, --format=FORMAT Encode to FORMAT.\n\ |
708 | -b, --boundary=LABEL PEM boundary is LABEL.\n\ |
709 | -o, --output=FILE Write output to FILE.\n\ |
710 | " }, |
711 | { "decode", decode, |
c65df279 |
712 | "decode [-f FORMAT] [-b LABEL] [-o OUTPUT] [FILE]", |
5c3f75ec |
713 | "\ |
714 | Options:\n\ |
715 | \n\ |
716 | -f, --format=FORMAT Decode from FORMAT.\n\ |
717 | -b, --boundary=LABEL PEM boundary is LABEL.\n\ |
718 | -o, --output=FILE Write output to FILE.\n\ |
719 | " }, |
720 | { "encrypt", encrypt, |
c65df279 |
721 | "encrypt [-a] [-k TAG] [-s TAG] [-f FORMAT]\n\t\ |
722 | [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
723 | Options:\n\ |
724 | \n\ |
725 | -a, --armour Same as `-f pem'.\n\ |
726 | -f, --format=FORMAT Encode as FORMAT.\n\ |
c65df279 |
727 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
728 | -s, --sign-key=TAG Use private signature key named by TAG.\n\ |
5c3f75ec |
729 | -o, --output=FILE Write output to FILE.\n\ |
730 | " }, |
731 | { "decrypt", decrypt, |
c65df279 |
732 | "decrypt [-aqv] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
733 | Options:\n\ |
734 | \n\ |
c65df279 |
735 | -a, --armour Same as `-f pem'.\n\ |
736 | -v, --verbose Produce more verbose messages.\n\ |
737 | -q, --quiet Produce fewer messages.\n\ |
738 | -f, --format=FORMAT Decode as FORMAT.\n\ |
5c3f75ec |
739 | -o, --output=FILE Write output to FILE.\n\ |
740 | " }, |
741 | { 0, 0, 0 } |
742 | }; |
743 | |
c65df279 |
744 | static int cmd_help(int argc, char **argv) |
5c3f75ec |
745 | { |
c65df279 |
746 | sc_help(cmdtab, stdout, argv + 1); |
747 | return (0); |
5c3f75ec |
748 | } |
749 | |
c65df279 |
750 | void version(FILE *fp) |
5c3f75ec |
751 | { |
752 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
753 | } |
754 | |
755 | static void usage(FILE *fp) |
756 | { |
c65df279 |
757 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
5c3f75ec |
758 | } |
759 | |
c65df279 |
760 | void help_global(FILE *fp) |
5c3f75ec |
761 | { |
c65df279 |
762 | usage(fp); |
763 | fputs("\n\ |
ada55141 |
764 | Encrypt and decrypt files.\n\ |
c65df279 |
765 | \n\ |
766 | Global command-line options:\n\ |
767 | \n\ |
768 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
769 | -v, --version Show program version number.\n\ |
770 | -u, --usage Show a terse usage message.\n\ |
771 | \n\ |
772 | -k, --keyring=FILE Read keys from FILE.\n", |
773 | fp); |
5c3f75ec |
774 | } |
775 | |
776 | /* --- @main@ --- * |
777 | * |
778 | * Arguments: @int argc@ = number of command line arguments |
779 | * @char *argv[]@ = vector of command line arguments |
780 | * |
781 | * Returns: Zero if successful, nonzero otherwise. |
782 | * |
c65df279 |
783 | * Use: Encrypts or decrypts files. |
5c3f75ec |
784 | */ |
785 | |
786 | int main(int argc, char *argv[]) |
787 | { |
788 | unsigned f = 0; |
789 | |
790 | #define f_bogus 1u |
791 | |
792 | /* --- Initialize the library --- */ |
793 | |
794 | ego(argv[0]); |
795 | sub_init(); |
796 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
797 | rand_seed(RAND_GLOBAL, 160); |
798 | |
799 | /* --- Parse options --- */ |
800 | |
801 | for (;;) { |
802 | static struct option opts[] = { |
803 | { "help", 0, 0, 'h' }, |
804 | { "version", 0, 0, 'v' }, |
805 | { "usage", 0, 0, 'u' }, |
806 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
807 | { 0, 0, 0, 0 } |
808 | }; |
809 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
810 | if (i < 0) |
811 | break; |
812 | switch (i) { |
813 | case 'h': |
c65df279 |
814 | sc_help(cmdtab, stdout, argv + optind); |
5c3f75ec |
815 | exit(0); |
816 | break; |
817 | case 'v': |
818 | version(stdout); |
819 | exit(0); |
820 | break; |
821 | case 'u': |
822 | usage(stdout); |
823 | exit(0); |
824 | case 'k': |
825 | keyring = optarg; |
826 | break; |
827 | default: |
828 | f |= f_bogus; |
829 | break; |
830 | } |
831 | } |
832 | |
833 | argc -= optind; |
834 | argv += optind; |
835 | optind = 0; |
836 | if (f & f_bogus || argc < 1) { |
837 | usage(stderr); |
838 | exit(EXIT_FAILURE); |
839 | } |
840 | |
841 | /* --- Dispatch to the correct subcommand handler --- */ |
842 | |
c65df279 |
843 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
5c3f75ec |
844 | |
845 | #undef f_bogus |
846 | } |
847 | |
848 | /*----- That's all, folks -------------------------------------------------*/ |