Commit | Line | Data |
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5c3f75ec | 1 | /* -*-c-*- |
2 | * | |
5c3f75ec | 3 | * Command-line encryption tool |
4 | * | |
5 | * (c) 2004 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
5c3f75ec | 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 | * |
5c3f75ec | 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 | * |
5c3f75ec | 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 | ||
5c3f75ec | 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" | |
da4489a6 | 47 | #include "ct.h" |
5c3f75ec | 48 | #include "rand.h" |
49 | #include "noise.h" | |
50 | #include "mprand.h" | |
51 | #include "key.h" | |
52 | #include "cc.h" | |
53 | ||
c65df279 | 54 | #include "ectab.h" |
55 | #include "ptab.h" | |
56 | ||
5c3f75ec | 57 | /*----- Static variables --------------------------------------------------*/ |
58 | ||
59 | static const char *keyring = "keyring"; | |
60 | ||
61 | /*----- Data format -------------------------------------------------------*/ | |
62 | ||
63 | /* --- Overview --- * | |
64 | * | |
65 | * The encrypted message is divided into chunks, each preceded by a two-octet | |
66 | * length. The chunks don't need to be large -- the idea is that we can | |
67 | * stream the chunks in and out. | |
68 | * | |
69 | * The first chunk is a header. It contains the decryption key-id, and maybe | |
70 | * the verification key-id if the message is signed. | |
71 | * | |
72 | * Next comes the key-encapsulation chunk. This is decrypted in some | |
38b90111 | 73 | * KEM-specific way to yield a secret hash. The hash is expanded using an |
74 | * MGF (or similar) to make a symmetric encryption and MAC key. | |
5c3f75ec | 75 | * |
76 | * If the message is signed, there comes a signature chunk. The signature is | |
f9e51332 | 77 | * on the header and key-encapsulation chunks, and further output of the MGF. |
78 | * This means that the recipient can modify the message and still have a | |
79 | * valid signature, so it's not useful for proving things to other people; | |
80 | * but it also means that the recipient knows that the message is from | |
81 | * someone who knows the hash, which limits the possiblities to (a) whoever | |
82 | * encrypted the message (good!) and (b) whoever knows the recipient's | |
83 | * private key. | |
5c3f75ec | 84 | * |
85 | * Then come message chunks. Each one begins with a MAC over an implicit | |
86 | * sequence number and the ciphertext. The final chunk's ciphertext is | |
87 | * empty; no other chunk is empty. Thus can the correct end-of-file be | |
88 | * discerned. | |
89 | */ | |
90 | ||
91 | /*----- Chunk I/O ---------------------------------------------------------*/ | |
92 | ||
93 | static void chunk_write(enc *e, buf *b) | |
94 | { | |
95 | octet l[2]; | |
96 | size_t n = BLEN(b); | |
97 | assert(n <= MASK16); | |
98 | STORE16(l, n); | |
99 | if (e->ops->write(e, l, 2) || | |
100 | e->ops->write(e, BBASE(b), BLEN(b))) | |
101 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); | |
102 | } | |
103 | ||
104 | static void chunk_read(enc *e, dstr *d, buf *b) | |
105 | { | |
106 | octet l[2]; | |
107 | size_t n; | |
108 | ||
109 | dstr_reset(d); | |
110 | errno = 0; | |
111 | if (e->ops->read(e, l, 2) != 2) | |
112 | goto err; | |
113 | n = LOAD16(l); | |
114 | dstr_ensure(d, n); | |
115 | if (e->ops->read(e, d->buf, n) != n) | |
116 | goto err; | |
117 | d->len = n; | |
118 | buf_init(b, d->buf, d->len); | |
119 | return; | |
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 | } | |
125 | ||
126 | /*----- Encryption --------------------------------------------------------*/ | |
127 | ||
128 | static int encrypt(int argc, char *argv[]) | |
129 | { | |
cd6eca43 | 130 | const char *fn, *of = 0, *kn = "ccrypt", *skn = 0; |
5c3f75ec | 131 | FILE *ofp = 0; |
132 | FILE *fp = 0; | |
133 | const char *ef = "binary"; | |
cd6eca43 | 134 | fprogress ff; |
5c3f75ec | 135 | const char *err; |
136 | int i; | |
c65df279 | 137 | int en; |
f52f2db0 | 138 | size_t n, chsz; |
5c3f75ec | 139 | dstr d = DSTR_INIT; |
5c3f75ec | 140 | buf b; |
141 | size_t seq; | |
188f51de | 142 | char bb[65536]; |
5c3f75ec | 143 | unsigned f = 0; |
144 | key_file kf; | |
145 | key *k; | |
c65df279 | 146 | key *sk = 0; |
5c3f75ec | 147 | kem *km; |
66ff643c | 148 | bulk *bc; |
c65df279 | 149 | sig *s = 0; |
5c3f75ec | 150 | const encops *eo; |
151 | enc *e; | |
152 | ||
153 | #define f_bogus 1u | |
946c3f72 | 154 | #define f_nocheck 2u |
cd6eca43 | 155 | #define f_progress 4u |
5c3f75ec | 156 | |
157 | for (;;) { | |
158 | static const struct option opt[] = { | |
159 | { "key", OPTF_ARGREQ, 0, 'k' }, | |
c65df279 | 160 | { "sign-key", OPTF_ARGREQ, 0, 's' }, |
5c3f75ec | 161 | { "armour", 0, 0, 'a' }, |
162 | { "armor", 0, 0, 'a' }, | |
45c0fd36 MW |
163 | { "format", OPTF_ARGREQ, 0, 'f' }, |
164 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
cd6eca43 | 165 | { "progress", 0, 0, 'p' }, |
946c3f72 | 166 | { "nocheck", 0, 0, 'C' }, |
5c3f75ec | 167 | { 0, 0, 0, 0 } |
168 | }; | |
cd6eca43 | 169 | i = mdwopt(argc, argv, "k:s:af:o:pC", opt, 0, 0, 0); |
5c3f75ec | 170 | if (i < 0) break; |
171 | switch (i) { | |
172 | case 'k': kn = optarg; break; | |
c65df279 | 173 | case 's': skn = optarg; break; |
5c3f75ec | 174 | case 'a': ef = "pem"; break; |
175 | case 'f': ef = optarg; break; | |
176 | case 'o': of = optarg; break; | |
cd6eca43 | 177 | case 'p': f |= f_progress; break; |
946c3f72 | 178 | case 'C': f |= f_nocheck; break; |
5c3f75ec | 179 | default: f |= f_bogus; break; |
180 | } | |
181 | } | |
182 | if (argc - optind > 1 || (f & f_bogus)) | |
c65df279 | 183 | die(EXIT_FAILURE, "Usage: encrypt [-OPTIONS] [FILE]"); |
5c3f75ec | 184 | |
213e565f | 185 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
5c3f75ec | 186 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
187 | if ((k = key_bytag(&kf, kn)) == 0) | |
188 | die(EXIT_FAILURE, "key `%s' not found", kn); | |
c65df279 | 189 | if (skn && (sk = key_bytag(&kf, skn)) == 0) |
190 | die(EXIT_FAILURE, "key `%s' not found", skn); | |
5c3f75ec | 191 | |
192 | if ((eo = getenc(ef)) == 0) | |
193 | die(EXIT_FAILURE, "encoding `%s' not found", ef); | |
194 | ||
cd6eca43 MW |
195 | fn = optind < argc ? argv[optind++] : "-"; |
196 | if (strcmp(fn, "-") == 0) | |
5c3f75ec | 197 | fp = stdin; |
cd6eca43 | 198 | else if ((fp = fopen(fn, "rb")) == 0) { |
5c3f75ec | 199 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
cd6eca43 MW |
200 | fn, strerror(errno)); |
201 | } | |
5c3f75ec | 202 | |
203 | if (!of || strcmp(of, "-") == 0) | |
204 | ofp = stdout; | |
205 | else if ((ofp = fopen(of, eo->wmode)) == 0) { | |
206 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
9b1663a5 | 207 | of, strerror(errno)); |
5c3f75ec | 208 | } |
209 | ||
c65df279 | 210 | dstr_reset(&d); |
5c3f75ec | 211 | key_fulltag(k, &d); |
fa54fe1e | 212 | e = initenc(eo, ofp, "CATCRYPT ENCRYPTED MESSAGE"); |
66ff643c | 213 | km = getkem(k, "cckem", 0, &bc); |
946c3f72 | 214 | if (!(f & f_nocheck) && (err = km->ops->check(km)) != 0) |
fa54fe1e | 215 | moan("key %s fails check: %s", d.buf, err); |
c65df279 | 216 | if (sk) { |
217 | dstr_reset(&d); | |
218 | key_fulltag(sk, &d); | |
219 | s = getsig(sk, "ccsig", 1); | |
220 | if ((err = s->ops->check(s)) != 0) | |
fa54fe1e | 221 | moan("key %s fails check: %s", d.buf, err); |
c65df279 | 222 | } |
5c3f75ec | 223 | |
224 | /* --- Build the header chunk --- */ | |
225 | ||
226 | dstr_reset(&d); | |
227 | dstr_ensure(&d, 256); | |
228 | buf_init(&b, d.buf, 256); | |
229 | buf_putu32(&b, k->id); | |
c65df279 | 230 | if (sk) buf_putu32(&b, sk->id); |
5c3f75ec | 231 | assert(BOK(&b)); |
f9e51332 | 232 | if (s) GH_HASHBUF16(s->h, BBASE(&b), BLEN(&b)); |
5c3f75ec | 233 | chunk_write(e, &b); |
234 | ||
235 | /* --- Build the KEM chunk --- */ | |
236 | ||
237 | dstr_reset(&d); | |
66ff643c | 238 | if (setupkem(km, &d, bc)) die(EXIT_FAILURE, "failed to encapsulate key"); |
5c3f75ec | 239 | buf_init(&b, d.buf, d.len); |
240 | BSTEP(&b, d.len); | |
f9e51332 | 241 | if (s) GH_HASHBUF16(s->h, BBASE(&b), BLEN(&b)); |
5c3f75ec | 242 | chunk_write(e, &b); |
243 | ||
c65df279 | 244 | /* --- Write the signature chunk --- */ |
245 | ||
246 | if (s) { | |
66ff643c | 247 | GC_ENCRYPT(km->cx, 0, bb, 1024); |
c65df279 | 248 | GH_HASH(s->h, bb, 1024); |
249 | dstr_reset(&d); | |
250 | if ((en = s->ops->doit(s, &d)) != 0) | |
251 | die(EXIT_FAILURE, "error creating signature: %s", key_strerror(en)); | |
252 | buf_init(&b, d.buf, d.len); | |
253 | BSTEP(&b, d.len); | |
254 | chunk_write(e, &b); | |
45c0fd36 | 255 | } |
c65df279 | 256 | |
5c3f75ec | 257 | /* --- Now do the main crypto --- */ |
258 | ||
cd6eca43 MW |
259 | if (f & f_progress) { |
260 | if (fprogress_init(&ff, fn, fp)) { | |
261 | die(EXIT_FAILURE, "failed to initialize progress display: %s", | |
262 | strerror(errno)); | |
263 | } | |
264 | } | |
265 | ||
66ff643c MW |
266 | n = bc->ops->overhead(bc); |
267 | dstr_ensure(&d, sizeof(bb) + n); | |
5c3f75ec | 268 | seq = 0; |
66ff643c MW |
269 | chsz = MASK16 - n; |
270 | do { | |
f52f2db0 | 271 | n = fread(bb, 1, chsz, fp); |
cd6eca43 | 272 | if (f & f_progress) fprogress_update(&ff, n); |
5c3f75ec | 273 | buf_init(&b, d.buf, d.sz); |
66ff643c MW |
274 | if ((err = bc->ops->doit(bc, seq, &b, bb, n)) != 0) { |
275 | if (f & f_progress) fprogress_done(&ff); | |
276 | die(EXIT_FAILURE, "failed to encrypt packet: %s\n", err); | |
277 | } | |
278 | seq++; | |
5c3f75ec | 279 | chunk_write(e, &b); |
66ff643c | 280 | } while (n); |
5c3f75ec | 281 | |
282 | /* --- All done --- */ | |
283 | ||
cd6eca43 | 284 | if (f & f_progress) fprogress_done(&ff); |
5c3f75ec | 285 | e->ops->encdone(e); |
66ff643c | 286 | bc->ops->destroy(bc); |
5c3f75ec | 287 | freeenc(e); |
c65df279 | 288 | if (s) freesig(s); |
5c3f75ec | 289 | freekem(km); |
ef13e9a4 | 290 | if (fp != stdin) fclose(fp); |
5c3f75ec | 291 | if (of) fclose(ofp); |
292 | key_close(&kf); | |
293 | dstr_destroy(&d); | |
294 | return (0); | |
295 | ||
296 | #undef f_bogus | |
946c3f72 | 297 | #undef f_nocheck |
cd6eca43 | 298 | #undef f_progress |
5c3f75ec | 299 | } |
300 | ||
301 | /*---- Decryption ---------------------------------------------------------*/ | |
302 | ||
303 | static int decrypt(int argc, char *argv[]) | |
304 | { | |
cd6eca43 | 305 | const char *fn, *of = 0; |
fa54fe1e | 306 | FILE *ofp = 0, *rfp = 0; |
5c3f75ec | 307 | FILE *fp = 0; |
308 | const char *ef = "binary"; | |
cd6eca43 | 309 | fprogress ff; |
5c3f75ec | 310 | int i; |
fa54fe1e | 311 | size_t n; |
5c3f75ec | 312 | dstr d = DSTR_INIT; |
66ff643c | 313 | char bb[65536]; |
5c3f75ec | 314 | buf b; |
315 | key_file kf; | |
316 | size_t seq; | |
317 | uint32 id; | |
318 | key *k; | |
c65df279 | 319 | key *sk = 0; |
5c3f75ec | 320 | kem *km; |
c65df279 | 321 | sig *s = 0; |
66ff643c | 322 | bulk *bc; |
5c3f75ec | 323 | unsigned f = 0; |
324 | const encops *eo; | |
c65df279 | 325 | const char *err; |
326 | int verb = 1; | |
5c3f75ec | 327 | enc *e; |
328 | ||
329 | #define f_bogus 1u | |
fa54fe1e | 330 | #define f_buffer 2u |
946c3f72 | 331 | #define f_nocheck 4u |
cd6eca43 | 332 | #define f_progress 8u |
5c3f75ec | 333 | |
334 | for (;;) { | |
335 | static const struct option opt[] = { | |
336 | { "armour", 0, 0, 'a' }, | |
337 | { "armor", 0, 0, 'a' }, | |
fa54fe1e | 338 | { "buffer", 0, 0, 'b' }, |
c65df279 | 339 | { "verbose", 0, 0, 'v' }, |
340 | { "quiet", 0, 0, 'q' }, | |
946c3f72 | 341 | { "nocheck", 0, 0, 'C' }, |
45c0fd36 MW |
342 | { "format", OPTF_ARGREQ, 0, 'f' }, |
343 | { "output", OPTF_ARGREQ, 0, 'o' }, | |
cd6eca43 | 344 | { "progress", 0, 0, 'p' }, |
5c3f75ec | 345 | { 0, 0, 0, 0 } |
346 | }; | |
cd6eca43 | 347 | i = mdwopt(argc, argv, "abf:o:pqvC", opt, 0, 0, 0); |
5c3f75ec | 348 | if (i < 0) break; |
349 | switch (i) { | |
350 | case 'a': ef = "pem"; break; | |
fa54fe1e | 351 | case 'b': f |= f_buffer; break; |
c65df279 | 352 | case 'v': verb++; break; |
353 | case 'q': if (verb) verb--; break; | |
946c3f72 | 354 | case 'C': f |= f_nocheck; break; |
5c3f75ec | 355 | case 'f': ef = optarg; break; |
356 | case 'o': of = optarg; break; | |
cd6eca43 | 357 | case 'p': f |= f_progress; break; |
5c3f75ec | 358 | default: f |= f_bogus; break; |
359 | } | |
360 | } | |
361 | if (argc - optind > 1 || (f & f_bogus)) | |
c65df279 | 362 | die(EXIT_FAILURE, "Usage: decrypt [-OPTIONS] [FILE]"); |
5c3f75ec | 363 | |
364 | if ((eo = getenc(ef)) == 0) | |
365 | die(EXIT_FAILURE, "encoding `%s' not found", ef); | |
366 | ||
cd6eca43 MW |
367 | fn = optind < argc ? argv[optind++] : "-"; |
368 | if (strcmp(fn, "-") == 0) | |
5c3f75ec | 369 | fp = stdin; |
cd6eca43 | 370 | else if ((fp = fopen(fn, eo->rmode)) == 0) { |
5c3f75ec | 371 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
cd6eca43 MW |
372 | fn, strerror(errno)); |
373 | } | |
5c3f75ec | 374 | |
213e565f | 375 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
5c3f75ec | 376 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
377 | ||
fa54fe1e | 378 | e = initdec(eo, fp, checkbdry, "CATCRYPT ENCRYPTED MESSAGE"); |
5c3f75ec | 379 | |
cd6eca43 MW |
380 | if (f & f_progress) { |
381 | if (fprogress_init(&ff, fn, fp)) { | |
382 | die(EXIT_FAILURE, "failed to initialize progress display: %s", | |
383 | strerror(errno)); | |
384 | } | |
385 | } | |
386 | ||
5c3f75ec | 387 | /* --- Read the header chunk --- */ |
388 | ||
389 | chunk_read(e, &d, &b); | |
cd6eca43 MW |
390 | if (f & f_progress) |
391 | fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw); | |
c65df279 | 392 | if (buf_getu32(&b, &id)) { |
cd6eca43 | 393 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 394 | if (verb) printf("FAIL malformed header: missing keyid\n"); |
395 | exit(EXIT_FAILURE); | |
396 | } | |
397 | if ((k = key_byid(&kf, id)) == 0) { | |
cd6eca43 | 398 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 399 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
400 | exit(EXIT_FAILURE); | |
401 | } | |
402 | if (BLEFT(&b)) { | |
403 | if (buf_getu32(&b, &id)) { | |
cd6eca43 | 404 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 405 | if (verb) printf("FAIL malformed header: missing signature keyid\n"); |
406 | exit(EXIT_FAILURE); | |
407 | } | |
408 | if ((sk = key_byid(&kf, id)) == 0) { | |
cd6eca43 | 409 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 410 | if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id); |
411 | exit(EXIT_FAILURE); | |
412 | } | |
413 | } | |
414 | if (BLEFT(&b)) { | |
cd6eca43 | 415 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 416 | if (verb) printf("FAIL malformed header: junk at end\n"); |
417 | exit(EXIT_FAILURE); | |
418 | } | |
f9e51332 | 419 | if (sk) { |
420 | s = getsig(sk, "ccsig", 0); | |
421 | if (!(f & f_nocheck) && verb && (err = s->ops->check(s)) != 0) { | |
422 | dstr_reset(&d); | |
423 | key_fulltag(sk, &d); | |
424 | printf("WARN verification key %s fails check: %s\n", d.buf, err); | |
425 | } | |
426 | GH_HASHBUF16(s->h, BBASE(&b), BSZ(&b)); | |
427 | } | |
5c3f75ec | 428 | |
429 | /* --- Find the key --- */ | |
430 | ||
66ff643c | 431 | km = getkem(k, "cckem", 1, &bc); |
5c3f75ec | 432 | |
433 | /* --- Read the KEM chunk --- */ | |
434 | ||
435 | chunk_read(e, &d, &b); | |
cd6eca43 MW |
436 | if (f & f_progress) |
437 | fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw); | |
66ff643c | 438 | if (setupkem(km, &d, bc)) { |
cd6eca43 | 439 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 440 | if (verb) printf("FAIL failed to decapsulate key\n"); |
441 | exit(EXIT_FAILURE); | |
442 | } | |
f9e51332 | 443 | if (s) GH_HASHBUF16(s->h, d.buf, d.len); |
c65df279 | 444 | |
445 | /* --- Verify the signature, if there is one --- */ | |
446 | ||
447 | if (sk) { | |
c65df279 | 448 | dstr_reset(&d); |
449 | dstr_ensure(&d, 1024); | |
66ff643c | 450 | GC_ENCRYPT(km->cx, 0, d.buf, 1024); |
c65df279 | 451 | GH_HASH(s->h, d.buf, 1024); |
452 | chunk_read(e, &d, &b); | |
cd6eca43 MW |
453 | if (f & f_progress) |
454 | fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw); | |
c65df279 | 455 | if (s->ops->doit(s, &d)) { |
cd6eca43 | 456 | if (f & f_progress) fprogress_done(&ff); |
c65df279 | 457 | if (verb) printf("FAIL signature verification failed\n"); |
458 | exit(EXIT_FAILURE); | |
459 | } | |
460 | if (verb) { | |
461 | dstr_reset(&d); | |
462 | key_fulltag(sk, &d); | |
cd6eca43 | 463 | if (f & f_progress) fprogress_clear(&ff); |
fa54fe1e | 464 | printf("INFO good-signature %s\n", d.buf); |
c65df279 | 465 | } |
ef13e9a4 | 466 | freesig(s); |
cd6eca43 MW |
467 | } else if (verb) { |
468 | if (f & f_progress) fprogress_clear(&ff); | |
fa54fe1e | 469 | printf("INFO no-signature\n"); |
cd6eca43 | 470 | } |
5c3f75ec | 471 | |
472 | /* --- Now decrypt the main body --- */ | |
473 | ||
c65df279 | 474 | if (!of || strcmp(of, "-") == 0) { |
5c3f75ec | 475 | ofp = stdout; |
fa54fe1e | 476 | f |= f_buffer; |
5c3f75ec | 477 | } |
fa54fe1e | 478 | if (!(f & f_buffer)) { |
479 | if ((ofp = fopen(of, "wb")) == 0) { | |
cd6eca43 | 480 | if (f & f_progress) fprogress_done(&ff); |
fa54fe1e | 481 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
9b1663a5 | 482 | of, strerror(errno)); |
fa54fe1e | 483 | } |
484 | rfp = ofp; | |
cd6eca43 MW |
485 | } else if ((rfp = tmpfile()) == 0) { |
486 | if (f & f_progress) fprogress_done(&ff); | |
fa54fe1e | 487 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); |
cd6eca43 | 488 | } |
5c3f75ec | 489 | |
490 | seq = 0; | |
66ff643c | 491 | dstr_ensure(&d, bc->ops->overhead(bc)); |
5c3f75ec | 492 | dstr_ensure(&d, 4); |
493 | for (;;) { | |
5c3f75ec | 494 | chunk_read(e, &d, &b); |
cd6eca43 MW |
495 | if (f & f_progress) |
496 | fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw); | |
66ff643c MW |
497 | buf_init(&b, bb, sizeof(bb)); |
498 | if ((err = bc->ops->doit(bc, seq, &b, d.buf, d.len)) != 0) { | |
cd6eca43 | 499 | if (f & f_progress) fprogress_done(&ff); |
66ff643c | 500 | if (verb) printf("FAIL bad ciphertext chunk: %s\n", err); |
c65df279 | 501 | exit(EXIT_FAILURE); |
502 | } | |
66ff643c MW |
503 | seq++; |
504 | if (!BLEN(&b)) break; | |
505 | if (fwrite(BBASE(&b), 1, BLEN(&b), rfp) != BLEN(&b)) { | |
cd6eca43 | 506 | if (f & f_progress) fprogress_done(&ff); |
fa54fe1e | 507 | if (verb) printf("FAIL error writing output: %s\n", strerror(errno)); |
c65df279 | 508 | exit(EXIT_FAILURE); |
509 | } | |
510 | } | |
511 | ||
cd6eca43 | 512 | if (f & f_progress) fprogress_done(&ff); |
fa54fe1e | 513 | if (fflush(rfp) || ferror(rfp)) { |
514 | if (verb) printf("FAIL error writing output: %s\n", strerror(errno)); | |
c65df279 | 515 | exit(EXIT_FAILURE); |
5c3f75ec | 516 | } |
fa54fe1e | 517 | if (f & f_buffer) { |
518 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { | |
519 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", | |
520 | of, strerror(errno)); | |
521 | } | |
522 | rewind(rfp); | |
cd6eca43 | 523 | if (f & f_progress) fprogress_init(&ff, "copying buffer", rfp); |
fa54fe1e | 524 | dstr_reset(&d); |
525 | dstr_ensure(&d, 65536); | |
64459c98 | 526 | if (verb && ofp == stdout) printf("DATA\n"); |
fa54fe1e | 527 | for (;;) { |
528 | n = fread(d.buf, 1, d.sz, rfp); | |
529 | if (!n) break; | |
cd6eca43 MW |
530 | if (f & f_progress) fprogress_update(&ff, n); |
531 | if (fwrite(d.buf, 1, n, ofp) < n) { | |
532 | if (f & f_progress) fprogress_done(&ff); | |
fa54fe1e | 533 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
cd6eca43 | 534 | } |
fa54fe1e | 535 | } |
cd6eca43 | 536 | if (f & f_progress) fprogress_done(&ff); |
fa54fe1e | 537 | if (ferror(rfp) || fclose(rfp)) |
538 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); | |
539 | } | |
5c3f75ec | 540 | |
5c3f75ec | 541 | e->ops->decdone(e); |
c65df279 | 542 | if (verb && ofp != stdout) |
543 | printf("OK decrypted successfully\n"); | |
f0c52873 MW |
544 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
545 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); | |
66ff643c | 546 | bc->ops->destroy(bc); |
5c3f75ec | 547 | freeenc(e); |
5c3f75ec | 548 | freekem(km); |
ef13e9a4 | 549 | if (fp != stdin) fclose(fp); |
5c3f75ec | 550 | key_close(&kf); |
551 | dstr_destroy(&d); | |
552 | return (0); | |
553 | ||
554 | #undef f_bogus | |
fa54fe1e | 555 | #undef f_buffer |
946c3f72 | 556 | #undef f_nocheck |
cd6eca43 | 557 | #undef f_progress |
5c3f75ec | 558 | } |
559 | ||
560 | /*----- Main code ---------------------------------------------------------*/ | |
561 | ||
c65df279 | 562 | #define LISTS(LI) \ |
563 | LI("Lists", list, \ | |
564 | listtab[i].name, listtab[i].name) \ | |
565 | LI("Key-encapsulation mechanisms", kem, \ | |
566 | kemtab[i].name, kemtab[i].name) \ | |
66ff643c MW |
567 | LI("Bulk crypto transforms", bulk, \ |
568 | bulktab[i].name, bulktab[i].name) \ | |
c65df279 | 569 | LI("Signature schemes", sig, \ |
570 | sigtab[i].name, sigtab[i].name) \ | |
571 | LI("Encodings", enc, \ | |
572 | enctab[i].name, enctab[i].name) \ | |
573 | LI("Symmetric encryption algorithms", cipher, \ | |
574 | gciphertab[i], gciphertab[i]->name) \ | |
575 | LI("Hash functions", hash, \ | |
576 | ghashtab[i], ghashtab[i]->name) \ | |
577 | LI("Message authentication codes", mac, \ | |
578 | gmactab[i], gmactab[i]->name) | |
579 | ||
580 | MAKELISTTAB(listtab, LISTS) | |
581 | ||
582 | int cmd_show(int argc, char *argv[]) | |
583 | { | |
584 | return (displaylists(listtab, argv + 1)); | |
585 | } | |
586 | ||
587 | static int cmd_help(int, char **); | |
5c3f75ec | 588 | |
589 | static cmd cmdtab[] = { | |
c65df279 | 590 | { "help", cmd_help, "help [COMMAND...]" }, |
591 | { "show", cmd_show, "show [ITEM...]" }, | |
fa54fe1e | 592 | CMD_ENCODE, |
593 | CMD_DECODE, | |
5c3f75ec | 594 | { "encrypt", encrypt, |
cd6eca43 | 595 | "encrypt [-apC] [-k TAG] [-s TAG] [-f FORMAT]\n\t\ |
c65df279 | 596 | [-o OUTPUT] [FILE]", "\ |
5c3f75ec | 597 | Options:\n\ |
598 | \n\ | |
599 | -a, --armour Same as `-f pem'.\n\ | |
600 | -f, --format=FORMAT Encode as FORMAT.\n\ | |
c65df279 | 601 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
602 | -s, --sign-key=TAG Use private signature key named by TAG.\n\ | |
5c3f75ec | 603 | -o, --output=FILE Write output to FILE.\n\ |
cd6eca43 | 604 | -p, --progress Show progress on large files.\n\ |
946c3f72 | 605 | -C, --nocheck Don't check the public key.\n\ |
5c3f75ec | 606 | " }, |
607 | { "decrypt", decrypt, | |
cd6eca43 | 608 | "decrypt [-abpqvC] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
5c3f75ec | 609 | Options:\n\ |
610 | \n\ | |
c65df279 | 611 | -a, --armour Same as `-f pem'.\n\ |
fa54fe1e | 612 | -b, --buffer Buffer output until we're sure we have it all.\n\ |
c65df279 | 613 | -f, --format=FORMAT Decode as FORMAT.\n\ |
5c3f75ec | 614 | -o, --output=FILE Write output to FILE.\n\ |
cd6eca43 | 615 | -p, --progress Show progress on large files.\n\ |
fa54fe1e | 616 | -q, --quiet Produce fewer messages.\n\ |
617 | -v, --verbose Produce more verbose messages.\n\ | |
946c3f72 | 618 | -C, --nocheck Don't check the private key.\n\ |
cd6eca43 | 619 | " }, |
5c3f75ec | 620 | { 0, 0, 0 } |
621 | }; | |
622 | ||
c65df279 | 623 | static int cmd_help(int argc, char **argv) |
5c3f75ec | 624 | { |
c65df279 | 625 | sc_help(cmdtab, stdout, argv + 1); |
626 | return (0); | |
5c3f75ec | 627 | } |
628 | ||
c65df279 | 629 | void version(FILE *fp) |
5c3f75ec | 630 | { |
631 | pquis(fp, "$, Catacomb version " VERSION "\n"); | |
632 | } | |
633 | ||
634 | static void usage(FILE *fp) | |
635 | { | |
c65df279 | 636 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
5c3f75ec | 637 | } |
638 | ||
c65df279 | 639 | void help_global(FILE *fp) |
5c3f75ec | 640 | { |
c65df279 | 641 | usage(fp); |
642 | fputs("\n\ | |
ada55141 | 643 | Encrypt and decrypt files.\n\ |
c65df279 | 644 | \n\ |
645 | Global command-line options:\n\ | |
646 | \n\ | |
647 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ | |
648 | -v, --version Show program version number.\n\ | |
649 | -u, --usage Show a terse usage message.\n\ | |
650 | \n\ | |
651 | -k, --keyring=FILE Read keys from FILE.\n", | |
652 | fp); | |
5c3f75ec | 653 | } |
654 | ||
655 | /* --- @main@ --- * | |
656 | * | |
657 | * Arguments: @int argc@ = number of command line arguments | |
658 | * @char *argv[]@ = vector of command line arguments | |
659 | * | |
660 | * Returns: Zero if successful, nonzero otherwise. | |
661 | * | |
c65df279 | 662 | * Use: Encrypts or decrypts files. |
5c3f75ec | 663 | */ |
664 | ||
665 | int main(int argc, char *argv[]) | |
666 | { | |
667 | unsigned f = 0; | |
668 | ||
669 | #define f_bogus 1u | |
670 | ||
671 | /* --- Initialize the library --- */ | |
672 | ||
673 | ego(argv[0]); | |
674 | sub_init(); | |
675 | rand_noisesrc(RAND_GLOBAL, &noise_source); | |
676 | rand_seed(RAND_GLOBAL, 160); | |
677 | ||
678 | /* --- Parse options --- */ | |
679 | ||
680 | for (;;) { | |
681 | static struct option opts[] = { | |
682 | { "help", 0, 0, 'h' }, | |
683 | { "version", 0, 0, 'v' }, | |
684 | { "usage", 0, 0, 'u' }, | |
685 | { "keyring", OPTF_ARGREQ, 0, 'k' }, | |
686 | { 0, 0, 0, 0 } | |
687 | }; | |
688 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); | |
689 | if (i < 0) | |
690 | break; | |
691 | switch (i) { | |
692 | case 'h': | |
c65df279 | 693 | sc_help(cmdtab, stdout, argv + optind); |
5c3f75ec | 694 | exit(0); |
695 | break; | |
696 | case 'v': | |
697 | version(stdout); | |
698 | exit(0); | |
699 | break; | |
700 | case 'u': | |
701 | usage(stdout); | |
702 | exit(0); | |
703 | case 'k': | |
704 | keyring = optarg; | |
705 | break; | |
706 | default: | |
707 | f |= f_bogus; | |
708 | break; | |
709 | } | |
710 | } | |
711 | ||
712 | argc -= optind; | |
713 | argv += optind; | |
714 | optind = 0; | |
715 | if (f & f_bogus || argc < 1) { | |
716 | usage(stderr); | |
717 | exit(EXIT_FAILURE); | |
718 | } | |
719 | ||
720 | /* --- Dispatch to the correct subcommand handler --- */ | |
721 | ||
c65df279 | 722 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
5c3f75ec | 723 | |
724 | #undef f_bogus | |
725 | } | |
726 | ||
727 | /*----- That's all, folks -------------------------------------------------*/ |