5c3f75ec |
1 | /* -*-c-*- |
2 | * |
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3 | * $Id$ |
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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 | |
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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 |
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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' }, |
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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); |
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185 | if (i < 0) break; |
186 | switch (i) { |
187 | case 'k': kn = optarg; break; |
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188 | case 's': skn = optarg; break; |
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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]"); |
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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 | |
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226 | dstr_reset(&d); |
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227 | key_fulltag(k, &d); |
228 | e = initenc(eo, ofp, "CATCRYPT ENCRYPTED MESSAGE", 1); |
c65df279 |
229 | km = getkem(k, "cckem", 0); |
5c3f75ec |
230 | if ((err = km->ops->check(km)) != 0) |
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) |
237 | moan("key `%s' fails check: %s", d.buf, err); |
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); |
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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); |
279 | STORE32(bb, seq); |
280 | GH_HASH(h, bb, 4); |
281 | seq++; |
282 | if (GC_CLASS(c)->blksz) { |
283 | GC_ENCRYPT(cx, 0, bb, GC_CLASS(c)->blksz); |
284 | GC_SETIV(c, bb); |
285 | } |
286 | n = fread(bb, 1, sizeof(bb), fp); |
287 | if (!n) break; |
288 | buf_init(&b, d.buf, d.sz); |
289 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
290 | ct = buf_get(&b, n); |
291 | assert(tag); assert(ct); |
292 | GC_ENCRYPT(c, bb, ct, n); |
293 | GH_HASH(h, ct, n); |
294 | GH_DONE(h, tag); |
295 | GH_DESTROY(h); |
296 | chunk_write(e, &b); |
297 | } |
298 | |
299 | /* --- Final terminator packet --- */ |
300 | |
301 | buf_init(&b, d.buf, d.sz); |
302 | tag = buf_get(&b, GM_CLASS(m)->hashsz); |
303 | assert(tag); |
304 | GH_DONE(h, tag); |
305 | GH_DESTROY(h); |
306 | chunk_write(e, &b); |
307 | |
308 | /* --- All done --- */ |
309 | |
310 | e->ops->encdone(e); |
311 | GM_DESTROY(m); |
312 | GC_DESTROY(c); |
313 | GC_DESTROY(cx); |
314 | freeenc(e); |
c65df279 |
315 | if (s) freesig(s); |
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316 | freekem(km); |
317 | if (of) fclose(ofp); |
318 | key_close(&kf); |
319 | dstr_destroy(&d); |
320 | return (0); |
321 | |
322 | #undef f_bogus |
323 | } |
324 | |
325 | /*---- Decryption ---------------------------------------------------------*/ |
326 | |
327 | static int decrypt(int argc, char *argv[]) |
328 | { |
329 | const char *of = 0; |
330 | FILE *ofp = 0; |
331 | FILE *fp = 0; |
332 | const char *ef = "binary"; |
333 | int i; |
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; |
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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 |
355 | |
356 | for (;;) { |
357 | static const struct option opt[] = { |
358 | { "armour", 0, 0, 'a' }, |
359 | { "armor", 0, 0, 'a' }, |
c65df279 |
360 | { "verbose", 0, 0, 'v' }, |
361 | { "quiet", 0, 0, 'q' }, |
5c3f75ec |
362 | { "format", OPTF_ARGREQ, 0, 'f' }, |
363 | { "output", OPTF_ARGREQ, 0, 'o' }, |
364 | { 0, 0, 0, 0 } |
365 | }; |
c65df279 |
366 | i = mdwopt(argc, argv, "af:o:qv", opt, 0, 0, 0); |
5c3f75ec |
367 | if (i < 0) break; |
368 | switch (i) { |
369 | case 'a': ef = "pem"; break; |
c65df279 |
370 | case 'v': verb++; break; |
371 | case 'q': if (verb) verb--; break; |
5c3f75ec |
372 | case 'f': ef = optarg; break; |
373 | case 'o': of = optarg; break; |
374 | default: f |= f_bogus; break; |
375 | } |
376 | } |
377 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
378 | die(EXIT_FAILURE, "Usage: decrypt [-OPTIONS] [FILE]"); |
5c3f75ec |
379 | |
380 | if ((eo = getenc(ef)) == 0) |
381 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
382 | |
383 | if (optind == argc) |
384 | fp = stdin; |
385 | else if (strcmp(argv[optind], "-") == 0) { |
386 | fp = stdin; |
387 | optind++; |
388 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
389 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
390 | argv[optind], strerror(errno)); |
391 | } else |
392 | optind++; |
393 | |
394 | if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0)) |
395 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
396 | |
397 | e = initenc(eo, fp, "CATCRYPT ENCRYPTED MESSAGE", 0); |
398 | |
399 | /* --- Read the header chunk --- */ |
400 | |
401 | chunk_read(e, &d, &b); |
c65df279 |
402 | if (buf_getu32(&b, &id)) { |
403 | if (verb) printf("FAIL malformed header: missing keyid\n"); |
404 | exit(EXIT_FAILURE); |
405 | } |
406 | if ((k = key_byid(&kf, id)) == 0) { |
407 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
408 | exit(EXIT_FAILURE); |
409 | } |
410 | if (BLEFT(&b)) { |
411 | if (buf_getu32(&b, &id)) { |
412 | if (verb) printf("FAIL malformed header: missing signature keyid\n"); |
413 | exit(EXIT_FAILURE); |
414 | } |
415 | if ((sk = key_byid(&kf, id)) == 0) { |
416 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
417 | exit(EXIT_FAILURE); |
418 | } |
419 | } |
420 | if (BLEFT(&b)) { |
421 | if (verb) printf("FAIL malformed header: junk at end\n"); |
422 | exit(EXIT_FAILURE); |
423 | } |
5c3f75ec |
424 | |
425 | /* --- Find the key --- */ |
426 | |
c65df279 |
427 | km = getkem(k, "cckem", 1); |
5c3f75ec |
428 | |
429 | /* --- Read the KEM chunk --- */ |
430 | |
431 | chunk_read(e, &d, &b); |
c65df279 |
432 | if (setupkem(km, &d, &cx, &c, &m)) { |
433 | if (verb) printf("FAIL failed to decapsulate key\n"); |
434 | exit(EXIT_FAILURE); |
435 | } |
436 | |
437 | /* --- Verify the signature, if there is one --- */ |
438 | |
439 | if (sk) { |
440 | s = getsig(sk, "ccsig", 0); |
441 | dstr_reset(&d); |
442 | key_fulltag(sk, &d); |
443 | if (verb && (err = s->ops->check(s)) != 0) |
444 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
445 | dstr_reset(&d); |
446 | dstr_ensure(&d, 1024); |
447 | GC_ENCRYPT(cx, 0, d.buf, 1024); |
448 | GH_HASH(s->h, d.buf, 1024); |
449 | chunk_read(e, &d, &b); |
450 | if (s->ops->doit(s, &d)) { |
451 | if (verb) printf("FAIL signature verification failed\n"); |
452 | exit(EXIT_FAILURE); |
453 | } |
454 | if (verb) { |
455 | dstr_reset(&d); |
456 | key_fulltag(sk, &d); |
457 | printf("INFO good signature from %s\n", d.buf); |
458 | } |
459 | } else if (verb) |
460 | printf("INFO no signature packet\n"); |
5c3f75ec |
461 | |
462 | /* --- Now decrypt the main body --- */ |
463 | |
c65df279 |
464 | if (!of || strcmp(of, "-") == 0) { |
5c3f75ec |
465 | ofp = stdout; |
c65df279 |
466 | if (verb) printf("DATA\n"); |
467 | } else if ((ofp = fopen(of, "wb")) == 0) { |
5c3f75ec |
468 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
469 | ofp, strerror(errno)); |
470 | } |
471 | |
472 | seq = 0; |
473 | dstr_ensure(&d, GC_CLASS(c)->blksz); |
474 | dstr_ensure(&d, 4); |
475 | for (;;) { |
476 | if (GC_CLASS(c)->blksz) { |
477 | GC_ENCRYPT(cx, 0, d.buf, GC_CLASS(c)->blksz); |
478 | GC_SETIV(c, d.buf); |
479 | } |
480 | h = GM_INIT(m); |
481 | STORE32(d.buf, seq); |
482 | GH_HASH(h, d.buf, 4); |
483 | seq++; |
484 | chunk_read(e, &d, &b); |
c65df279 |
485 | if ((tag = buf_get(&b, GM_CLASS(m)->hashsz)) == 0) { |
486 | if (verb) printf("%sFAIL bad ciphertext chunk: no tag\n", |
487 | ofp == stdout ? "\n" : ""); |
488 | exit(EXIT_FAILURE); |
489 | } |
5c3f75ec |
490 | GH_HASH(h, BCUR(&b), BLEFT(&b)); |
c65df279 |
491 | if (memcmp(tag, GH_DONE(h, 0), GM_CLASS(m)->hashsz) != 0) { |
492 | if (verb) |
493 | printf("%sFAIL bad ciphertext chunk: authentication failure\n", |
494 | ofp == stdout ? "\n" : ""); |
495 | exit(EXIT_FAILURE); |
496 | } |
5c3f75ec |
497 | if (!BLEFT(&b)) |
498 | break; |
499 | GC_DECRYPT(c, BCUR(&b), BCUR(&b), BLEFT(&b)); |
c65df279 |
500 | if (fwrite(BCUR(&b), 1, BLEFT(&b), ofp) != BLEFT(&b)) { |
501 | if (verb) printf("%sFAIL error writing output: %s\n", |
502 | ofp == stdout ? "\n" : "", strerror(errno)); |
503 | exit(EXIT_FAILURE); |
504 | } |
505 | } |
506 | |
507 | if (fflush(ofp) || ferror(ofp)) { |
508 | if (verb) printf("%sFAIL error writing output: %s\n", |
509 | ofp == stdout ? "\n" : "", strerror(errno)); |
510 | exit(EXIT_FAILURE); |
5c3f75ec |
511 | } |
512 | |
5c3f75ec |
513 | e->ops->decdone(e); |
c65df279 |
514 | if (verb && ofp != stdout) |
515 | printf("OK decrypted successfully\n"); |
5c3f75ec |
516 | freeenc(e); |
517 | GC_DESTROY(c); |
518 | GC_DESTROY(cx); |
519 | GM_DESTROY(m); |
520 | freekem(km); |
521 | if (of) fclose(ofp); |
522 | key_close(&kf); |
523 | dstr_destroy(&d); |
524 | return (0); |
525 | |
526 | #undef f_bogus |
527 | } |
528 | |
529 | /*----- Test code ---------------------------------------------------------*/ |
530 | |
531 | static int encode(int argc, char *argv[]) |
532 | { |
533 | const char *of = 0; |
534 | FILE *ofp = 0; |
535 | FILE *fp = 0; |
536 | const char *ef = "binary"; |
537 | const char *bd = "MESSAGE"; |
538 | int i; |
539 | size_t n; |
540 | char buf[4096]; |
541 | unsigned f = 0; |
542 | const encops *eo; |
543 | enc *e; |
544 | |
545 | #define f_bogus 1u |
546 | |
547 | for (;;) { |
548 | static const struct option opt[] = { |
549 | { "format", OPTF_ARGREQ, 0, 'f' }, |
550 | { "boundary", OPTF_ARGREQ, 0, 'b' }, |
551 | { "output", OPTF_ARGREQ, 0, 'o' }, |
552 | { 0, 0, 0, 0 } |
553 | }; |
554 | i = mdwopt(argc, argv, "f:b:o:", opt, 0, 0, 0); |
555 | if (i < 0) break; |
556 | switch (i) { |
557 | case 'f': ef = optarg; break; |
558 | case 'b': bd = optarg; break; |
559 | case 'o': of = optarg; break; |
560 | default: f |= f_bogus; break; |
561 | } |
562 | } |
563 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
564 | die(EXIT_FAILURE, "Usage: encode [-OPTIONS] [FILE]"); |
5c3f75ec |
565 | |
566 | if ((eo = getenc(ef)) == 0) |
567 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
568 | |
569 | if (optind == argc) |
570 | fp = stdin; |
571 | else if (strcmp(argv[optind], "-") == 0) { |
572 | fp = stdin; |
573 | optind++; |
574 | } else if ((fp = fopen(argv[optind], "rb")) == 0) { |
575 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
576 | argv[optind], strerror(errno)); |
577 | } else |
578 | optind++; |
579 | |
580 | if (!of || strcmp(of, "-") == 0) |
581 | ofp = stdout; |
582 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
583 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
584 | ofp, strerror(errno)); |
585 | } |
586 | |
587 | e = initenc(eo, ofp, bd, 1); |
588 | |
589 | do { |
590 | n = fread(buf, 1, sizeof(buf), fp); |
591 | if (e->ops->write(e, buf, n)) |
592 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
593 | } while (n == sizeof(buf)); |
594 | e->ops->encdone(e); |
595 | freeenc(e); |
596 | return (0); |
597 | |
598 | #undef f_bogus |
599 | } |
600 | |
601 | static int decode(int argc, char *argv[]) |
602 | { |
603 | const char *of = 0; |
604 | FILE *ofp = 0; |
605 | FILE *fp = 0; |
606 | const char *ef = "binary"; |
607 | const char *bd = 0; |
608 | int i; |
609 | char buf[4096]; |
610 | unsigned f = 0; |
611 | const encops *eo; |
612 | enc *e; |
613 | |
614 | #define f_bogus 1u |
615 | |
616 | for (;;) { |
617 | static const struct option opt[] = { |
618 | { "format", OPTF_ARGREQ, 0, 'f' }, |
619 | { "boundary", OPTF_ARGREQ, 0, 'b' }, |
620 | { "output", OPTF_ARGREQ, 0, 'o' }, |
621 | { 0, 0, 0, 0 } |
622 | }; |
623 | i = mdwopt(argc, argv, "f:b:o:", opt, 0, 0, 0); |
624 | if (i < 0) break; |
625 | switch (i) { |
626 | case 'f': ef = optarg; break; |
627 | case 'b': bd = optarg; break; |
628 | case 'o': of = optarg; break; |
629 | default: f |= f_bogus; break; |
630 | } |
631 | } |
632 | if (argc - optind > 1 || (f & f_bogus)) |
c65df279 |
633 | die(EXIT_FAILURE, "Usage: decode [-OPTIONS] [FILE]"); |
5c3f75ec |
634 | |
635 | if ((eo = getenc(ef)) == 0) |
636 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
637 | |
638 | if (optind == argc) |
639 | fp = stdin; |
640 | else if (strcmp(argv[optind], "-") == 0) { |
641 | fp = stdin; |
642 | optind++; |
643 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
644 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
645 | argv[optind], strerror(errno)); |
646 | } else |
647 | optind++; |
648 | |
649 | if (!of || strcmp(of, "-") == 0) |
650 | ofp = stdout; |
651 | else if ((ofp = fopen(of, "wb")) == 0) { |
652 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
653 | ofp, strerror(errno)); |
654 | } |
655 | |
656 | e = initenc(eo, fp, bd, 0); |
657 | |
658 | do { |
659 | if ((i = e->ops->read(e, buf, sizeof(buf))) < 0) |
660 | die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
661 | if (fwrite(buf, 1, i, ofp) < i) |
662 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
663 | } while (i == sizeof(buf)); |
664 | e->ops->decdone(e); |
665 | freeenc(e); |
666 | return (0); |
667 | |
668 | #undef f_bogus |
669 | } |
670 | |
671 | /*----- Main code ---------------------------------------------------------*/ |
672 | |
c65df279 |
673 | #define LISTS(LI) \ |
674 | LI("Lists", list, \ |
675 | listtab[i].name, listtab[i].name) \ |
676 | LI("Key-encapsulation mechanisms", kem, \ |
677 | kemtab[i].name, kemtab[i].name) \ |
678 | LI("Signature schemes", sig, \ |
679 | sigtab[i].name, sigtab[i].name) \ |
680 | LI("Encodings", enc, \ |
681 | enctab[i].name, enctab[i].name) \ |
682 | LI("Symmetric encryption algorithms", cipher, \ |
683 | gciphertab[i], gciphertab[i]->name) \ |
684 | LI("Hash functions", hash, \ |
685 | ghashtab[i], ghashtab[i]->name) \ |
686 | LI("Message authentication codes", mac, \ |
687 | gmactab[i], gmactab[i]->name) |
688 | |
689 | MAKELISTTAB(listtab, LISTS) |
690 | |
691 | int cmd_show(int argc, char *argv[]) |
692 | { |
693 | return (displaylists(listtab, argv + 1)); |
694 | } |
695 | |
696 | static int cmd_help(int, char **); |
5c3f75ec |
697 | |
698 | static cmd cmdtab[] = { |
c65df279 |
699 | { "help", cmd_help, "help [COMMAND...]" }, |
700 | { "show", cmd_show, "show [ITEM...]" }, |
5c3f75ec |
701 | { "encode", encode, |
c65df279 |
702 | "encode [-f FORMAT] [-b LABEL] [-o OUTPUT] [FILE]", |
5c3f75ec |
703 | "\ |
704 | Options:\n\ |
705 | \n\ |
706 | -f, --format=FORMAT Encode to FORMAT.\n\ |
707 | -b, --boundary=LABEL PEM boundary is LABEL.\n\ |
708 | -o, --output=FILE Write output to FILE.\n\ |
709 | " }, |
710 | { "decode", decode, |
c65df279 |
711 | "decode [-f FORMAT] [-b LABEL] [-o OUTPUT] [FILE]", |
5c3f75ec |
712 | "\ |
713 | Options:\n\ |
714 | \n\ |
715 | -f, --format=FORMAT Decode from FORMAT.\n\ |
716 | -b, --boundary=LABEL PEM boundary is LABEL.\n\ |
717 | -o, --output=FILE Write output to FILE.\n\ |
718 | " }, |
719 | { "encrypt", encrypt, |
c65df279 |
720 | "encrypt [-a] [-k TAG] [-s TAG] [-f FORMAT]\n\t\ |
721 | [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
722 | Options:\n\ |
723 | \n\ |
724 | -a, --armour Same as `-f pem'.\n\ |
725 | -f, --format=FORMAT Encode as FORMAT.\n\ |
c65df279 |
726 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
727 | -s, --sign-key=TAG Use private signature key named by TAG.\n\ |
5c3f75ec |
728 | -o, --output=FILE Write output to FILE.\n\ |
729 | " }, |
730 | { "decrypt", decrypt, |
c65df279 |
731 | "decrypt [-aqv] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
5c3f75ec |
732 | Options:\n\ |
733 | \n\ |
c65df279 |
734 | -a, --armour Same as `-f pem'.\n\ |
735 | -v, --verbose Produce more verbose messages.\n\ |
736 | -q, --quiet Produce fewer messages.\n\ |
737 | -f, --format=FORMAT Decode as FORMAT.\n\ |
5c3f75ec |
738 | -o, --output=FILE Write output to FILE.\n\ |
739 | " }, |
740 | { 0, 0, 0 } |
741 | }; |
742 | |
c65df279 |
743 | static int cmd_help(int argc, char **argv) |
5c3f75ec |
744 | { |
c65df279 |
745 | sc_help(cmdtab, stdout, argv + 1); |
746 | return (0); |
5c3f75ec |
747 | } |
748 | |
c65df279 |
749 | void version(FILE *fp) |
5c3f75ec |
750 | { |
751 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
752 | } |
753 | |
754 | static void usage(FILE *fp) |
755 | { |
c65df279 |
756 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
5c3f75ec |
757 | } |
758 | |
c65df279 |
759 | void help_global(FILE *fp) |
5c3f75ec |
760 | { |
c65df279 |
761 | usage(fp); |
762 | fputs("\n\ |
ada55141 |
763 | Encrypt and decrypt files.\n\ |
c65df279 |
764 | \n\ |
765 | Global command-line options:\n\ |
766 | \n\ |
767 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
768 | -v, --version Show program version number.\n\ |
769 | -u, --usage Show a terse usage message.\n\ |
770 | \n\ |
771 | -k, --keyring=FILE Read keys from FILE.\n", |
772 | fp); |
5c3f75ec |
773 | } |
774 | |
775 | /* --- @main@ --- * |
776 | * |
777 | * Arguments: @int argc@ = number of command line arguments |
778 | * @char *argv[]@ = vector of command line arguments |
779 | * |
780 | * Returns: Zero if successful, nonzero otherwise. |
781 | * |
c65df279 |
782 | * Use: Encrypts or decrypts files. |
5c3f75ec |
783 | */ |
784 | |
785 | int main(int argc, char *argv[]) |
786 | { |
787 | unsigned f = 0; |
788 | |
789 | #define f_bogus 1u |
790 | |
791 | /* --- Initialize the library --- */ |
792 | |
793 | ego(argv[0]); |
794 | sub_init(); |
795 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
796 | rand_seed(RAND_GLOBAL, 160); |
797 | |
798 | /* --- Parse options --- */ |
799 | |
800 | for (;;) { |
801 | static struct option opts[] = { |
802 | { "help", 0, 0, 'h' }, |
803 | { "version", 0, 0, 'v' }, |
804 | { "usage", 0, 0, 'u' }, |
805 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
806 | { 0, 0, 0, 0 } |
807 | }; |
808 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
809 | if (i < 0) |
810 | break; |
811 | switch (i) { |
812 | case 'h': |
c65df279 |
813 | sc_help(cmdtab, stdout, argv + optind); |
5c3f75ec |
814 | exit(0); |
815 | break; |
816 | case 'v': |
817 | version(stdout); |
818 | exit(0); |
819 | break; |
820 | case 'u': |
821 | usage(stdout); |
822 | exit(0); |
823 | case 'k': |
824 | keyring = optarg; |
825 | break; |
826 | default: |
827 | f |= f_bogus; |
828 | break; |
829 | } |
830 | } |
831 | |
832 | argc -= optind; |
833 | argv += optind; |
834 | optind = 0; |
835 | if (f & f_bogus || argc < 1) { |
836 | usage(stderr); |
837 | exit(EXIT_FAILURE); |
838 | } |
839 | |
840 | /* --- Dispatch to the correct subcommand handler --- */ |
841 | |
c65df279 |
842 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
5c3f75ec |
843 | |
844 | #undef f_bogus |
845 | } |
846 | |
847 | /*----- That's all, folks -------------------------------------------------*/ |