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 |
38b90111 |
91 | * KEM-specific way to yield a secret hash. The hash is expanded using an |
92 | * MGF (or similar) to make a symmetric encryption and MAC key. |
5c3f75ec |
93 | * |
94 | * If the message is signed, there comes a signature chunk. The signature is |
38b90111 |
95 | * on the further output of the MGF. This means that the recipient can |
96 | * modify the message and still have a valid signature, so it's not useful |
97 | * for proving things to other people; but it also means that the recipient |
98 | * knows that the message is from someone who knows the hash, which limits |
99 | * the possiblities to (a) whoever encrypted the message (good!) and (b) |
100 | * whoever knows the recipient's private key. |
5c3f75ec |
101 | * |
102 | * Then come message chunks. Each one begins with a MAC over an implicit |
103 | * sequence number and the ciphertext. The final chunk's ciphertext is |
104 | * empty; no other chunk is empty. Thus can the correct end-of-file be |
105 | * discerned. |
106 | */ |
107 | |
108 | /*----- Chunk I/O ---------------------------------------------------------*/ |
109 | |
110 | static void chunk_write(enc *e, buf *b) |
111 | { |
112 | octet l[2]; |
113 | size_t n = BLEN(b); |
114 | assert(n <= MASK16); |
115 | STORE16(l, n); |
116 | if (e->ops->write(e, l, 2) || |
117 | e->ops->write(e, BBASE(b), BLEN(b))) |
118 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
119 | } |
120 | |
121 | static void chunk_read(enc *e, dstr *d, buf *b) |
122 | { |
123 | octet l[2]; |
124 | size_t n; |
125 | |
126 | dstr_reset(d); |
127 | errno = 0; |
128 | if (e->ops->read(e, l, 2) != 2) |
129 | goto err; |
130 | n = LOAD16(l); |
131 | dstr_ensure(d, n); |
132 | if (e->ops->read(e, d->buf, n) != n) |
133 | goto err; |
134 | d->len = n; |
135 | buf_init(b, d->buf, d->len); |
136 | return; |
137 | |
138 | err: |
139 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); |
140 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
141 | } |
142 | |
143 | /*----- Encryption --------------------------------------------------------*/ |
144 | |
145 | static int encrypt(int argc, char *argv[]) |
146 | { |
c65df279 |
147 | const char *of = 0, *kn = "ccrypt", *skn = 0; |
5c3f75ec |
148 | FILE *ofp = 0; |
149 | FILE *fp = 0; |
150 | const char *ef = "binary"; |
151 | const char *err; |
152 | int i; |
c65df279 |
153 | int en; |
5c3f75ec |
154 | size_t n; |
155 | dstr d = DSTR_INIT; |
156 | octet *tag, *ct; |
157 | buf b; |
158 | size_t seq; |
159 | char bb[16384]; |
160 | unsigned f = 0; |
161 | key_file kf; |
162 | key *k; |
c65df279 |
163 | key *sk = 0; |
5c3f75ec |
164 | kem *km; |
c65df279 |
165 | sig *s = 0; |
5c3f75ec |
166 | gcipher *cx, *c; |
167 | gmac *m; |
168 | ghash *h; |
169 | const encops *eo; |
170 | enc *e; |
171 | |
172 | #define f_bogus 1u |
173 | |
174 | for (;;) { |
175 | static const struct option opt[] = { |
176 | { "key", OPTF_ARGREQ, 0, 'k' }, |
c65df279 |
177 | { "sign-key", OPTF_ARGREQ, 0, 's' }, |
5c3f75ec |
178 | { "armour", 0, 0, 'a' }, |
179 | { "armor", 0, 0, 'a' }, |
180 | { "format", OPTF_ARGREQ, 0, 'f' }, |
181 | { "output", OPTF_ARGREQ, 0, 'o' }, |
182 | { 0, 0, 0, 0 } |
183 | }; |
c65df279 |
184 | i = mdwopt(argc, argv, "k:s:af:o:", opt, 0, 0, 0); |
5c3f75ec |
185 | if (i < 0) break; |
186 | switch (i) { |
187 | case 'k': kn = optarg; break; |
c65df279 |
188 | case 's': skn = optarg; break; |
5c3f75ec |
189 | case 'a': ef = "pem"; break; |
190 | case 'f': ef = optarg; break; |
191 | case 'o': of = optarg; break; |
192 | default: f |= f_bogus; break; |
193 | } |
194 | } |
195 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
196 | die(EXIT_FAILURE, "Usage: encrypt [-OPTIONS] [FILE]"); |
5c3f75ec |
197 | |
198 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
199 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
200 | if ((k = key_bytag(&kf, kn)) == 0) |
201 | die(EXIT_FAILURE, "key `%s' not found", kn); |
c65df279 |
202 | if (skn && (sk = key_bytag(&kf, skn)) == 0) |
203 | die(EXIT_FAILURE, "key `%s' not found", skn); |
5c3f75ec |
204 | |
205 | if ((eo = getenc(ef)) == 0) |
206 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
207 | |
208 | if (optind == argc) |
209 | fp = stdin; |
210 | else if (strcmp(argv[optind], "-") == 0) { |
211 | fp = stdin; |
212 | optind++; |
213 | } else if ((fp = fopen(argv[optind], "rb")) == 0) { |
214 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
215 | argv[optind], strerror(errno)); |
216 | } else |
217 | optind++; |
218 | |
219 | if (!of || strcmp(of, "-") == 0) |
220 | ofp = stdout; |
221 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
222 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
223 | ofp, strerror(errno)); |
224 | } |
225 | |
c65df279 |
226 | dstr_reset(&d); |
5c3f75ec |
227 | key_fulltag(k, &d); |
fa54fe1e |
228 | e = initenc(eo, ofp, "CATCRYPT ENCRYPTED MESSAGE"); |
c65df279 |
229 | km = getkem(k, "cckem", 0); |
5c3f75ec |
230 | if ((err = km->ops->check(km)) != 0) |
fa54fe1e |
231 | moan("key %s fails check: %s", d.buf, err); |
c65df279 |
232 | if (sk) { |
233 | dstr_reset(&d); |
234 | key_fulltag(sk, &d); |
235 | s = getsig(sk, "ccsig", 1); |
236 | if ((err = s->ops->check(s)) != 0) |
fa54fe1e |
237 | moan("key %s fails check: %s", d.buf, err); |
c65df279 |
238 | } |
5c3f75ec |
239 | |
240 | /* --- Build the header chunk --- */ |
241 | |
242 | dstr_reset(&d); |
243 | dstr_ensure(&d, 256); |
244 | buf_init(&b, d.buf, 256); |
245 | buf_putu32(&b, k->id); |
c65df279 |
246 | if (sk) buf_putu32(&b, sk->id); |
5c3f75ec |
247 | assert(BOK(&b)); |
248 | chunk_write(e, &b); |
249 | |
250 | /* --- Build the KEM chunk --- */ |
251 | |
252 | dstr_reset(&d); |
253 | if (setupkem(km, &d, &cx, &c, &m)) |
254 | die(EXIT_FAILURE, "failed to encapsulate key"); |
255 | buf_init(&b, d.buf, d.len); |
256 | BSTEP(&b, d.len); |
257 | chunk_write(e, &b); |
258 | |
c65df279 |
259 | /* --- Write the signature chunk --- */ |
260 | |
261 | if (s) { |
262 | GC_ENCRYPT(cx, 0, bb, 1024); |
263 | GH_HASH(s->h, bb, 1024); |
264 | dstr_reset(&d); |
265 | if ((en = s->ops->doit(s, &d)) != 0) |
266 | die(EXIT_FAILURE, "error creating signature: %s", key_strerror(en)); |
267 | buf_init(&b, d.buf, d.len); |
268 | BSTEP(&b, d.len); |
269 | chunk_write(e, &b); |
270 | } |
271 | |
5c3f75ec |
272 | /* --- Now do the main crypto --- */ |
273 | |
274 | assert(GC_CLASS(c)->blksz <= sizeof(bb)); |
275 | dstr_ensure(&d, sizeof(bb) + GM_CLASS(m)->hashsz); |
276 | seq = 0; |
277 | for (;;) { |
278 | h = GM_INIT(m); |
dfd1608a |
279 | GH_HASHU32(h, seq); |
5c3f75ec |
280 | seq++; |
281 | if (GC_CLASS(c)->blksz) { |
282 | GC_ENCRYPT(cx, 0, bb, GC_CLASS(c)->blksz); |
283 | GC_SETIV(c, bb); |
284 | } |
285 | n = fread(bb, 1, sizeof(bb), fp); |
286 | if (!n) break; |
287 | buf_init(&b, d.buf, d.sz); |
288 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
289 | ct = buf_get(&b, n); |
290 | assert(tag); assert(ct); |
291 | GC_ENCRYPT(c, bb, ct, n); |
292 | GH_HASH(h, ct, n); |
293 | GH_DONE(h, tag); |
294 | GH_DESTROY(h); |
295 | chunk_write(e, &b); |
296 | } |
297 | |
298 | /* --- Final terminator packet --- */ |
299 | |
300 | buf_init(&b, d.buf, d.sz); |
301 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
302 | assert(tag); |
303 | GH_DONE(h, tag); |
304 | GH_DESTROY(h); |
305 | chunk_write(e, &b); |
306 | |
307 | /* --- All done --- */ |
308 | |
309 | e->ops->encdone(e); |
310 | GM_DESTROY(m); |
311 | GC_DESTROY(c); |
312 | GC_DESTROY(cx); |
313 | freeenc(e); |
c65df279 |
314 | if (s) freesig(s); |
5c3f75ec |
315 | freekem(km); |
316 | if (of) fclose(ofp); |
317 | key_close(&kf); |
318 | dstr_destroy(&d); |
319 | return (0); |
320 | |
321 | #undef f_bogus |
322 | } |
323 | |
324 | /*---- Decryption ---------------------------------------------------------*/ |
325 | |
326 | static int decrypt(int argc, char *argv[]) |
327 | { |
328 | const char *of = 0; |
fa54fe1e |
329 | FILE *ofp = 0, *rfp = 0; |
5c3f75ec |
330 | FILE *fp = 0; |
331 | const char *ef = "binary"; |
332 | int i; |
fa54fe1e |
333 | size_t n; |
5c3f75ec |
334 | dstr d = DSTR_INIT; |
335 | buf b; |
336 | key_file kf; |
337 | size_t seq; |
338 | uint32 id; |
339 | key *k; |
c65df279 |
340 | key *sk = 0; |
5c3f75ec |
341 | kem *km; |
c65df279 |
342 | sig *s = 0; |
5c3f75ec |
343 | gcipher *cx; |
344 | gcipher *c; |
345 | ghash *h; |
346 | gmac *m; |
347 | octet *tag; |
348 | unsigned f = 0; |
349 | const encops *eo; |
c65df279 |
350 | const char *err; |
351 | int verb = 1; |
5c3f75ec |
352 | enc *e; |
353 | |
354 | #define f_bogus 1u |
fa54fe1e |
355 | #define f_buffer 2u |
5c3f75ec |
356 | |
357 | for (;;) { |
358 | static const struct option opt[] = { |
359 | { "armour", 0, 0, 'a' }, |
360 | { "armor", 0, 0, 'a' }, |
fa54fe1e |
361 | { "buffer", 0, 0, 'b' }, |
c65df279 |
362 | { "verbose", 0, 0, 'v' }, |
363 | { "quiet", 0, 0, 'q' }, |
5c3f75ec |
364 | { "format", OPTF_ARGREQ, 0, 'f' }, |
365 | { "output", OPTF_ARGREQ, 0, 'o' }, |
366 | { 0, 0, 0, 0 } |
367 | }; |
64459c98 |
368 | i = mdwopt(argc, argv, "abf:o:qv", opt, 0, 0, 0); |
5c3f75ec |
369 | if (i < 0) break; |
370 | switch (i) { |
371 | case 'a': ef = "pem"; break; |
fa54fe1e |
372 | case 'b': f |= f_buffer; break; |
c65df279 |
373 | case 'v': verb++; break; |
374 | case 'q': if (verb) verb--; break; |
5c3f75ec |
375 | case 'f': ef = optarg; break; |
376 | case 'o': of = optarg; break; |
377 | default: f |= f_bogus; break; |
378 | } |
379 | } |
380 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
381 | die(EXIT_FAILURE, "Usage: decrypt [-OPTIONS] [FILE]"); |
5c3f75ec |
382 | |
383 | if ((eo = getenc(ef)) == 0) |
384 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
385 | |
386 | if (optind == argc) |
387 | fp = stdin; |
388 | else if (strcmp(argv[optind], "-") == 0) { |
389 | fp = stdin; |
390 | optind++; |
391 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
392 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
393 | argv[optind], strerror(errno)); |
394 | } else |
395 | optind++; |
396 | |
397 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
398 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
399 | |
fa54fe1e |
400 | e = initdec(eo, fp, checkbdry, "CATCRYPT ENCRYPTED MESSAGE"); |
5c3f75ec |
401 | |
402 | /* --- Read the header chunk --- */ |
403 | |
404 | chunk_read(e, &d, &b); |
c65df279 |
405 | if (buf_getu32(&b, &id)) { |
406 | if (verb) printf("FAIL malformed header: missing keyid\n"); |
407 | exit(EXIT_FAILURE); |
408 | } |
409 | if ((k = key_byid(&kf, id)) == 0) { |
410 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
411 | exit(EXIT_FAILURE); |
412 | } |
413 | if (BLEFT(&b)) { |
414 | if (buf_getu32(&b, &id)) { |
415 | if (verb) printf("FAIL malformed header: missing signature keyid\n"); |
416 | exit(EXIT_FAILURE); |
417 | } |
418 | if ((sk = key_byid(&kf, id)) == 0) { |
419 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
420 | exit(EXIT_FAILURE); |
421 | } |
422 | } |
423 | if (BLEFT(&b)) { |
424 | if (verb) printf("FAIL malformed header: junk at end\n"); |
425 | exit(EXIT_FAILURE); |
426 | } |
5c3f75ec |
427 | |
428 | /* --- Find the key --- */ |
429 | |
c65df279 |
430 | km = getkem(k, "cckem", 1); |
5c3f75ec |
431 | |
432 | /* --- Read the KEM chunk --- */ |
433 | |
434 | chunk_read(e, &d, &b); |
c65df279 |
435 | if (setupkem(km, &d, &cx, &c, &m)) { |
436 | if (verb) printf("FAIL failed to decapsulate key\n"); |
437 | exit(EXIT_FAILURE); |
438 | } |
439 | |
440 | /* --- Verify the signature, if there is one --- */ |
441 | |
442 | if (sk) { |
443 | s = getsig(sk, "ccsig", 0); |
444 | dstr_reset(&d); |
445 | key_fulltag(sk, &d); |
446 | if (verb && (err = s->ops->check(s)) != 0) |
447 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
448 | dstr_reset(&d); |
449 | dstr_ensure(&d, 1024); |
450 | GC_ENCRYPT(cx, 0, d.buf, 1024); |
451 | GH_HASH(s->h, d.buf, 1024); |
452 | chunk_read(e, &d, &b); |
453 | if (s->ops->doit(s, &d)) { |
454 | if (verb) printf("FAIL signature verification failed\n"); |
455 | exit(EXIT_FAILURE); |
456 | } |
457 | if (verb) { |
458 | dstr_reset(&d); |
459 | key_fulltag(sk, &d); |
fa54fe1e |
460 | printf("INFO good-signature %s\n", d.buf); |
c65df279 |
461 | } |
462 | } else if (verb) |
fa54fe1e |
463 | printf("INFO no-signature\n"); |
5c3f75ec |
464 | |
465 | /* --- Now decrypt the main body --- */ |
466 | |
c65df279 |
467 | if (!of || strcmp(of, "-") == 0) { |
5c3f75ec |
468 | ofp = stdout; |
fa54fe1e |
469 | f |= f_buffer; |
5c3f75ec |
470 | } |
fa54fe1e |
471 | if (!(f & f_buffer)) { |
472 | if ((ofp = fopen(of, "wb")) == 0) { |
473 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
474 | ofp, strerror(errno)); |
475 | } |
476 | rfp = ofp; |
477 | } else if ((rfp = tmpfile()) == 0) |
478 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); |
5c3f75ec |
479 | |
480 | seq = 0; |
481 | dstr_ensure(&d, GC_CLASS(c)->blksz); |
482 | dstr_ensure(&d, 4); |
483 | for (;;) { |
484 | if (GC_CLASS(c)->blksz) { |
485 | GC_ENCRYPT(cx, 0, d.buf, GC_CLASS(c)->blksz); |
486 | GC_SETIV(c, d.buf); |
487 | } |
488 | h = GM_INIT(m); |
dfd1608a |
489 | GH_HASHU32(h, seq); |
5c3f75ec |
490 | seq++; |
491 | chunk_read(e, &d, &b); |
c65df279 |
492 | if ((tag = buf_get(&b, GM_CLASS(m)->hashsz)) == 0) { |
fa54fe1e |
493 | if (verb) printf("FAIL bad ciphertext chunk: no tag\n"); |
c65df279 |
494 | exit(EXIT_FAILURE); |
495 | } |
5c3f75ec |
496 | GH_HASH(h, BCUR(&b), BLEFT(&b)); |
c65df279 |
497 | if (memcmp(tag, GH_DONE(h, 0), GM_CLASS(m)->hashsz) != 0) { |
498 | if (verb) |
fa54fe1e |
499 | printf("FAIL bad ciphertext chunk: authentication failure\n"); |
c65df279 |
500 | exit(EXIT_FAILURE); |
501 | } |
5c3f75ec |
502 | if (!BLEFT(&b)) |
503 | break; |
504 | GC_DECRYPT(c, BCUR(&b), BCUR(&b), BLEFT(&b)); |
fa54fe1e |
505 | if (fwrite(BCUR(&b), 1, BLEFT(&b), rfp) != BLEFT(&b)) { |
506 | if (verb) printf("FAIL error writing output: %s\n", strerror(errno)); |
c65df279 |
507 | exit(EXIT_FAILURE); |
508 | } |
509 | } |
510 | |
fa54fe1e |
511 | if (fflush(rfp) || ferror(rfp)) { |
512 | if (verb) printf("FAIL error writing output: %s\n", strerror(errno)); |
c65df279 |
513 | exit(EXIT_FAILURE); |
5c3f75ec |
514 | } |
fa54fe1e |
515 | if (f & f_buffer) { |
516 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { |
517 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
518 | of, strerror(errno)); |
519 | } |
520 | rewind(rfp); |
521 | dstr_reset(&d); |
522 | dstr_ensure(&d, 65536); |
64459c98 |
523 | if (verb && ofp == stdout) printf("DATA\n"); |
fa54fe1e |
524 | for (;;) { |
525 | n = fread(d.buf, 1, d.sz, rfp); |
526 | if (!n) break; |
527 | if (fwrite(d.buf, 1, n, ofp) < n) |
528 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
529 | } |
530 | if (ferror(rfp) || fclose(rfp)) |
531 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); |
532 | } |
533 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
534 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
5c3f75ec |
535 | |
5c3f75ec |
536 | e->ops->decdone(e); |
c65df279 |
537 | if (verb && ofp != stdout) |
538 | printf("OK decrypted successfully\n"); |
5c3f75ec |
539 | freeenc(e); |
540 | GC_DESTROY(c); |
541 | GC_DESTROY(cx); |
542 | GM_DESTROY(m); |
543 | freekem(km); |
544 | if (of) fclose(ofp); |
545 | key_close(&kf); |
546 | dstr_destroy(&d); |
547 | return (0); |
548 | |
549 | #undef f_bogus |
fa54fe1e |
550 | #undef f_buffer |
5c3f75ec |
551 | } |
552 | |
553 | /*----- Main code ---------------------------------------------------------*/ |
554 | |
c65df279 |
555 | #define LISTS(LI) \ |
556 | LI("Lists", list, \ |
557 | listtab[i].name, listtab[i].name) \ |
558 | LI("Key-encapsulation mechanisms", kem, \ |
559 | kemtab[i].name, kemtab[i].name) \ |
560 | LI("Signature schemes", sig, \ |
561 | sigtab[i].name, sigtab[i].name) \ |
562 | LI("Encodings", enc, \ |
563 | enctab[i].name, enctab[i].name) \ |
564 | LI("Symmetric encryption algorithms", cipher, \ |
565 | gciphertab[i], gciphertab[i]->name) \ |
566 | LI("Hash functions", hash, \ |
567 | ghashtab[i], ghashtab[i]->name) \ |
568 | LI("Message authentication codes", mac, \ |
569 | gmactab[i], gmactab[i]->name) |
570 | |
571 | MAKELISTTAB(listtab, LISTS) |
572 | |
573 | int cmd_show(int argc, char *argv[]) |
574 | { |
575 | return (displaylists(listtab, argv + 1)); |
576 | } |
577 | |
578 | static int cmd_help(int, char **); |
5c3f75ec |
579 | |
580 | static cmd cmdtab[] = { |
c65df279 |
581 | { "help", cmd_help, "help [COMMAND...]" }, |
582 | { "show", cmd_show, "show [ITEM...]" }, |
fa54fe1e |
583 | CMD_ENCODE, |
584 | CMD_DECODE, |
5c3f75ec |
585 | { "encrypt", encrypt, |
c65df279 |
586 | "encrypt [-a] [-k TAG] [-s TAG] [-f FORMAT]\n\t\ |
587 | [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
588 | Options:\n\ |
589 | \n\ |
590 | -a, --armour Same as `-f pem'.\n\ |
591 | -f, --format=FORMAT Encode as FORMAT.\n\ |
c65df279 |
592 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
593 | -s, --sign-key=TAG Use private signature key named by TAG.\n\ |
5c3f75ec |
594 | -o, --output=FILE Write output to FILE.\n\ |
595 | " }, |
596 | { "decrypt", decrypt, |
fa54fe1e |
597 | "decrypt [-abqv] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
598 | Options:\n\ |
599 | \n\ |
c65df279 |
600 | -a, --armour Same as `-f pem'.\n\ |
fa54fe1e |
601 | -b, --buffer Buffer output until we're sure we have it all.\n\ |
c65df279 |
602 | -f, --format=FORMAT Decode as FORMAT.\n\ |
5c3f75ec |
603 | -o, --output=FILE Write output to FILE.\n\ |
fa54fe1e |
604 | -q, --quiet Produce fewer messages.\n\ |
605 | -v, --verbose Produce more verbose messages.\n\ |
606 | " }, /* ' emacs is confused */ |
5c3f75ec |
607 | { 0, 0, 0 } |
608 | }; |
609 | |
c65df279 |
610 | static int cmd_help(int argc, char **argv) |
5c3f75ec |
611 | { |
c65df279 |
612 | sc_help(cmdtab, stdout, argv + 1); |
613 | return (0); |
5c3f75ec |
614 | } |
615 | |
c65df279 |
616 | void version(FILE *fp) |
5c3f75ec |
617 | { |
618 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
619 | } |
620 | |
621 | static void usage(FILE *fp) |
622 | { |
c65df279 |
623 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
5c3f75ec |
624 | } |
625 | |
c65df279 |
626 | void help_global(FILE *fp) |
5c3f75ec |
627 | { |
c65df279 |
628 | usage(fp); |
629 | fputs("\n\ |
ada55141 |
630 | Encrypt and decrypt files.\n\ |
c65df279 |
631 | \n\ |
632 | Global command-line options:\n\ |
633 | \n\ |
634 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
635 | -v, --version Show program version number.\n\ |
636 | -u, --usage Show a terse usage message.\n\ |
637 | \n\ |
638 | -k, --keyring=FILE Read keys from FILE.\n", |
639 | fp); |
5c3f75ec |
640 | } |
641 | |
642 | /* --- @main@ --- * |
643 | * |
644 | * Arguments: @int argc@ = number of command line arguments |
645 | * @char *argv[]@ = vector of command line arguments |
646 | * |
647 | * Returns: Zero if successful, nonzero otherwise. |
648 | * |
c65df279 |
649 | * Use: Encrypts or decrypts files. |
5c3f75ec |
650 | */ |
651 | |
652 | int main(int argc, char *argv[]) |
653 | { |
654 | unsigned f = 0; |
655 | |
656 | #define f_bogus 1u |
657 | |
658 | /* --- Initialize the library --- */ |
659 | |
660 | ego(argv[0]); |
661 | sub_init(); |
662 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
663 | rand_seed(RAND_GLOBAL, 160); |
664 | |
665 | /* --- Parse options --- */ |
666 | |
667 | for (;;) { |
668 | static struct option opts[] = { |
669 | { "help", 0, 0, 'h' }, |
670 | { "version", 0, 0, 'v' }, |
671 | { "usage", 0, 0, 'u' }, |
672 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
673 | { 0, 0, 0, 0 } |
674 | }; |
675 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
676 | if (i < 0) |
677 | break; |
678 | switch (i) { |
679 | case 'h': |
c65df279 |
680 | sc_help(cmdtab, stdout, argv + optind); |
5c3f75ec |
681 | exit(0); |
682 | break; |
683 | case 'v': |
684 | version(stdout); |
685 | exit(0); |
686 | break; |
687 | case 'u': |
688 | usage(stdout); |
689 | exit(0); |
690 | case 'k': |
691 | keyring = optarg; |
692 | break; |
693 | default: |
694 | f |= f_bogus; |
695 | break; |
696 | } |
697 | } |
698 | |
699 | argc -= optind; |
700 | argv += optind; |
701 | optind = 0; |
702 | if (f & f_bogus || argc < 1) { |
703 | usage(stderr); |
704 | exit(EXIT_FAILURE); |
705 | } |
706 | |
707 | /* --- Dispatch to the correct subcommand handler --- */ |
708 | |
c65df279 |
709 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
5c3f75ec |
710 | |
711 | #undef f_bogus |
712 | } |
713 | |
714 | /*----- That's all, folks -------------------------------------------------*/ |