| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * Sign files |
| 6 | * |
| 7 | * (c) 2005 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 <ctype.h> |
| 35 | #include <errno.h> |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <string.h> |
| 39 | #include <time.h> |
| 40 | |
| 41 | #include <mLib/base64.h> |
| 42 | #include <mLib/dstr.h> |
| 43 | #include <mLib/mdwopt.h> |
| 44 | #include <mLib/quis.h> |
| 45 | #include <mLib/report.h> |
| 46 | #include <mLib/sub.h> |
| 47 | |
| 48 | #include "buf.h" |
| 49 | #include "rand.h" |
| 50 | #include "noise.h" |
| 51 | #include "mprand.h" |
| 52 | #include "key.h" |
| 53 | #include "getdate.h" |
| 54 | #include "cc.h" |
| 55 | |
| 56 | #include "ectab.h" |
| 57 | #include "ptab.h" |
| 58 | |
| 59 | /*----- Static variables --------------------------------------------------*/ |
| 60 | |
| 61 | static const char *keyring = "keyring"; |
| 62 | |
| 63 | /*----- Data formats ------------------------------------------------------* |
| 64 | * |
| 65 | * Our crypto stuff is split into three parts: a header describing the key, |
| 66 | * the message itself, and the signature. In a detached signature, the |
| 67 | * message is separate, and the header and signature are combined into one |
| 68 | * encoded chunk. In an attached signature, the message is included. There |
| 69 | * are two forms of message: binary and text. Binary messages are divided |
| 70 | * into chunks, each preceded by a 2-octet length, and terminated by a |
| 71 | * zero-length chunk. Text messages are byte-stuffed, as for RFC821, and |
| 72 | * trailing whitespace before a newline is ignored. |
| 73 | */ |
| 74 | |
| 75 | typedef struct sigmsg { |
| 76 | unsigned f; /* Flags */ |
| 77 | #define F_DETACH 1u |
| 78 | #define F_BINARY 2u |
| 79 | #define F_SIGMASK 3u |
| 80 | #define F_HASHMASK (F_BINARY) |
| 81 | uint32 keyid; /* Key identifier */ |
| 82 | time_t t; /* When the signature was made */ |
| 83 | dstr kh; /* Key fingerprint (sanity check) */ |
| 84 | dstr sig; /* Signature */ |
| 85 | sig *s; /* Signature algorithm */ |
| 86 | } sigmsg; |
| 87 | |
| 88 | #define F_MIDLINE 16u |
| 89 | #define F_EOF 32u |
| 90 | #define F_NOCLOSE 64u |
| 91 | #define F_BOGUS 128u |
| 92 | #define F_BUFFER 256u |
| 93 | #define F_UTC 512u |
| 94 | #define F_NOCHECK 1024u |
| 95 | |
| 96 | /*----- Chunk I/O ---------------------------------------------------------*/ |
| 97 | |
| 98 | static void chunk_write(enc *e, const void *p, size_t n) |
| 99 | { |
| 100 | octet b[2]; |
| 101 | |
| 102 | assert(n <= 0xffff); |
| 103 | STORE16(b, n); |
| 104 | if (e->ops->write(e, b, 2) || e->ops->write(e, p, n)) |
| 105 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
| 106 | } |
| 107 | |
| 108 | static size_t chunk_read(enc *e, void *p) |
| 109 | { |
| 110 | octet b[2]; |
| 111 | size_t n; |
| 112 | |
| 113 | if (e->ops->read(e, b, 2) != 2) |
| 114 | goto err; |
| 115 | n = LOAD16(b); |
| 116 | if (n && e->ops->read(e, p, n) != n) |
| 117 | goto err; |
| 118 | return (n); |
| 119 | |
| 120 | err: |
| 121 | if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input"); |
| 122 | else die(EXIT_FAILURE, "error reading input: %s", strerror(errno)); |
| 123 | return (0); |
| 124 | } |
| 125 | |
| 126 | /*----- Message canonification --------------------------------------------*/ |
| 127 | |
| 128 | #define MSGBUFSZ 65536 |
| 129 | #define MSGBUFTHRESH 32768 |
| 130 | |
| 131 | typedef struct msgcanon { |
| 132 | unsigned f; |
| 133 | FILE *fp; |
| 134 | enc *e; |
| 135 | size_t (*read)(struct msgcanon *, void *); |
| 136 | void (*write)(struct msgcanon *, const void *, size_t); |
| 137 | void (*close)(struct msgcanon *); |
| 138 | } msgcanon; |
| 139 | |
| 140 | #define MC_INIT { 0 } |
| 141 | |
| 142 | static size_t textread(msgcanon *m, void *bp) |
| 143 | { |
| 144 | size_t n = 0, nsp = 0; |
| 145 | int ch; |
| 146 | char *b = bp; |
| 147 | unsigned f = m->f; |
| 148 | |
| 149 | if (f & F_EOF) return (0); |
| 150 | for (;;) { |
| 151 | if ((ch = getc(m->fp)) == EOF) goto eof; |
| 152 | if (!(f & (F_DETACH | F_MIDLINE)) && ch == '.') { |
| 153 | ch = getc(m->fp); |
| 154 | if (ch == '\n') goto eof; |
| 155 | } |
| 156 | if (ch == '\n') { |
| 157 | n -= nsp; nsp = 0; |
| 158 | if (n >= MSGBUFTHRESH) goto full; |
| 159 | b[n++] = ch; |
| 160 | f &= ~F_MIDLINE; |
| 161 | } else if (isspace(ch)) { |
| 162 | f |= F_MIDLINE; |
| 163 | if (n >= MSGBUFSZ) goto full; |
| 164 | b[n++] = ch; nsp++; |
| 165 | } else { |
| 166 | f |= F_MIDLINE; |
| 167 | nsp = 0; |
| 168 | if (n >= MSGBUFTHRESH) goto full; |
| 169 | b[n++] = ch; |
| 170 | } |
| 171 | } |
| 172 | eof: |
| 173 | f |= F_EOF; |
| 174 | goto done; |
| 175 | full: |
| 176 | ungetc(ch, m->fp); |
| 177 | done: |
| 178 | m->f = f; |
| 179 | return (n); |
| 180 | } |
| 181 | |
| 182 | static void textwrite(msgcanon *m, const void *bp, size_t n) |
| 183 | { |
| 184 | const char *p = bp, *l = p + n; |
| 185 | unsigned f = m->f; |
| 186 | |
| 187 | while (p < l) { |
| 188 | if (!(f & (F_MIDLINE | F_DETACH)) && |
| 189 | (*p == '.' || *p == '-')) |
| 190 | putc('.', m->fp); |
| 191 | if (*p == '\n') f &= ~F_MIDLINE; |
| 192 | else f |= F_MIDLINE; |
| 193 | putc(*p, m->fp); |
| 194 | p++; |
| 195 | } |
| 196 | m->f = f; |
| 197 | } |
| 198 | |
| 199 | static size_t binreadembed(msgcanon *m, void *bp) |
| 200 | { return (chunk_read(m->e, bp)); } |
| 201 | static size_t binreaddetach(msgcanon *m, void *bp) |
| 202 | { return (fread(bp, 1, MSGBUFSZ, m->fp)); } |
| 203 | |
| 204 | static void binwriteembed(msgcanon *m, const void *bp, size_t n) |
| 205 | { chunk_write(m->e, bp, n); } |
| 206 | |
| 207 | static void nullwrite(msgcanon *m, const void *bp, size_t n) { ; } |
| 208 | |
| 209 | static void mcsetup_readfile(msgcanon *m, unsigned f, const char *fn) |
| 210 | { |
| 211 | m->f = F_DETACH | (f & F_BINARY); |
| 212 | if (!fn || strcmp(fn, "-") == 0) { |
| 213 | m->fp = stdin; |
| 214 | m->f |= F_NOCLOSE; |
| 215 | } else if ((m->fp = fopen(fn, (f & F_BINARY) ? "rb" : "r")) == 0) |
| 216 | die(EXIT_FAILURE, "couldn't open file `%s': %s", fn, strerror(errno)); |
| 217 | m->read = (f & F_BINARY) ? binreaddetach : textread; |
| 218 | } |
| 219 | |
| 220 | static void mcsetup_writenull(msgcanon *m) { m->write = nullwrite; } |
| 221 | |
| 222 | static void mcsetup_read(msgcanon *m, unsigned f, enc **ee, const char *dfn) |
| 223 | { |
| 224 | enc *e = *ee; |
| 225 | |
| 226 | m->f = f | F_NOCLOSE; |
| 227 | |
| 228 | if (dfn && !(f & F_DETACH)) die(EXIT_FAILURE, "signature is not detached"); |
| 229 | if (f & F_BINARY) { |
| 230 | if (!(f & F_DETACH)) { |
| 231 | m->e = e; |
| 232 | *ee = 0; |
| 233 | m->fp = e->fp; |
| 234 | m->read = binreadembed; |
| 235 | } else { |
| 236 | m->read = binreaddetach; |
| 237 | if (!dfn || strcmp(dfn, "-") == 0) |
| 238 | m->fp = stdin; |
| 239 | else if ((m->fp = fopen(dfn, "rb")) == 0) |
| 240 | die(EXIT_FAILURE, "can't open `%s': %s", dfn, strerror(errno)); |
| 241 | else |
| 242 | m->f &= ~F_NOCLOSE; |
| 243 | } |
| 244 | } else { |
| 245 | m->read = textread; |
| 246 | if (!(f & F_DETACH)) { |
| 247 | if (e->ops->decdone(e) || ferror(e->fp)) |
| 248 | die(EXIT_FAILURE, "error at end of signature header"); |
| 249 | m->fp = e->fp; |
| 250 | e->ops->destroy(e); |
| 251 | *ee = 0; |
| 252 | } else if (!dfn || strcmp(dfn, "-") == 0) |
| 253 | m->fp = stdin; |
| 254 | else if ((m->fp = fopen(dfn, "r")) == 0) |
| 255 | die(EXIT_FAILURE, "can't read file `%s': %s", dfn, strerror(errno)); |
| 256 | else |
| 257 | m->f &= ~F_NOCLOSE; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | static void mcsetup_write(msgcanon *m, unsigned f, enc **ee) |
| 262 | { |
| 263 | enc *e = *ee; |
| 264 | |
| 265 | m->f = f | F_NOCLOSE; |
| 266 | |
| 267 | if (f & F_DETACH) |
| 268 | m->write = nullwrite; |
| 269 | else if (f & F_BINARY) { |
| 270 | m->e = e; |
| 271 | *ee = 0; |
| 272 | m->fp = e->fp; |
| 273 | m->write = binwriteembed; |
| 274 | } else { |
| 275 | if (e->ops->encdone(e) || ferror(e->fp)) |
| 276 | die(EXIT_FAILURE, "error at end of signature header"); |
| 277 | m->fp = e->fp; |
| 278 | e->ops->destroy(e); |
| 279 | *ee = 0; |
| 280 | m->write = textwrite; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | static void mc_endread(msgcanon *m, const encops *eops, enc **ee) |
| 285 | { |
| 286 | if (!(m->f & F_DETACH)) { |
| 287 | if (m->f & F_BINARY) |
| 288 | *ee = m->e; |
| 289 | else |
| 290 | *ee = initdec(eops, m->fp, checkbdry, "CATSIGN SIGNATURE"); |
| 291 | } |
| 292 | if (m->fp && !(m->f & F_NOCLOSE)) { |
| 293 | if (ferror(m->fp) || fclose(m->fp)) |
| 294 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | static void mc_endwrite(msgcanon *m, const encops *eops, enc **ee) |
| 299 | { |
| 300 | if (!(m->f & F_BINARY)) { |
| 301 | if (m->f & F_MIDLINE) putc('\n', m->fp); |
| 302 | if (!(m->f & F_DETACH)) { |
| 303 | putc('.', m->fp); putc('\n', m->fp); |
| 304 | *ee = initenc(eops, m->fp, "CATSIGN SIGNATURE"); |
| 305 | } |
| 306 | } else if (!(m->f & F_DETACH)) { |
| 307 | chunk_write(m->e, 0, 0); |
| 308 | *ee = m->e; |
| 309 | } |
| 310 | if (m->fp && !(m->f & F_NOCLOSE)) { |
| 311 | if (fflush(m->fp) || ferror(m->fp) || fclose(m->fp)) |
| 312 | die(EXIT_FAILURE, "error closing message file: %s", strerror(errno)); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /*----- Signature reading and writing -------------------------------------*/ |
| 317 | |
| 318 | static void sig_init(sigmsg *s, unsigned f, uint32 keyid) |
| 319 | { |
| 320 | s->f = f & F_SIGMASK; |
| 321 | s->keyid = keyid; |
| 322 | time(&s->t); |
| 323 | s->s = 0; |
| 324 | dstr_create(&s->kh); |
| 325 | dstr_create(&s->sig); |
| 326 | } |
| 327 | |
| 328 | static void sig_destroy(sigmsg *s) |
| 329 | { |
| 330 | dstr_destroy(&s->kh); |
| 331 | dstr_destroy(&s->sig); |
| 332 | if (s->s) freesig(s->s); |
| 333 | } |
| 334 | |
| 335 | static void sigtobuffer(sigmsg *s, buf *b, int hashp) |
| 336 | { |
| 337 | kludge64 t; |
| 338 | |
| 339 | ASSIGN64(t, s->t); |
| 340 | if (hashp) buf_putu16(b, s->f & F_HASHMASK); |
| 341 | else buf_putu16(b, s->f & F_SIGMASK); |
| 342 | buf_putu32(b, s->keyid); |
| 343 | buf_putu32(b, HI64(t)); |
| 344 | buf_putu32(b, LO64(t)); |
| 345 | buf_putdstr16(b, &s->kh); |
| 346 | assert(BOK(b)); |
| 347 | } |
| 348 | |
| 349 | static void dohash(ghash *h, const void *p, size_t n) |
| 350 | { |
| 351 | /* trace_block(1, "hashing", p, n); */ |
| 352 | GH_HASH(h, p, n); |
| 353 | } |
| 354 | |
| 355 | static void sig_hash(sigmsg *s) |
| 356 | { |
| 357 | octet bb[16384]; |
| 358 | buf b; |
| 359 | |
| 360 | buf_init(&b, bb, sizeof(bb)); |
| 361 | sigtobuffer(s, &b, 1); |
| 362 | dohash(s->s->h, BBASE(&b), BLEN(&b)); |
| 363 | } |
| 364 | |
| 365 | static void keyhash(key *k, sig *s, dstr *d) |
| 366 | { |
| 367 | ghash *h; |
| 368 | key_filter kf; |
| 369 | |
| 370 | h = GH_INIT(GH_CLASS(s->h)); |
| 371 | kf.f = KCAT_PUB; |
| 372 | kf.m = KF_CATMASK; |
| 373 | key_fingerprint(k, h, &kf); |
| 374 | dstr_ensure(d, GH_CLASS(h)->hashsz); |
| 375 | GH_DONE(h, d->buf + d->len); |
| 376 | d->len += GH_CLASS(h)->hashsz; |
| 377 | GH_DESTROY(h); |
| 378 | } |
| 379 | |
| 380 | static void sig_writeheader(enc *e, sigmsg *s) |
| 381 | { |
| 382 | octet bb[16384]; |
| 383 | buf b; |
| 384 | |
| 385 | buf_init(&b, bb, sizeof(bb)); |
| 386 | sigtobuffer(s, &b, 0); |
| 387 | chunk_write(e, BBASE(&b), BLEN(&b)); |
| 388 | } |
| 389 | |
| 390 | static void sig_writesig(enc *e, sigmsg *s) |
| 391 | { chunk_write(e, s->sig.buf, s->sig.len); } |
| 392 | |
| 393 | static void diechoke(const char *m, void *p) |
| 394 | { die(EXIT_FAILURE, "%s%s%s", p, p ? ": " : "", m); } |
| 395 | |
| 396 | static void sig_readheader(enc *e, sigmsg *s, |
| 397 | void (*choke)(const char *, void *), void *p) |
| 398 | { |
| 399 | uint16 f; |
| 400 | octet bb[MSGBUFSZ]; |
| 401 | uint32 x, y; |
| 402 | kludge64 t; |
| 403 | buf b; |
| 404 | size_t n; |
| 405 | |
| 406 | n = chunk_read(e, bb); |
| 407 | buf_init(&b, bb, n); |
| 408 | if (buf_getu16(&b, &f)) choke("missing flags", p); |
| 409 | if (buf_getu32(&b, &x)) choke("missing keyid", p); |
| 410 | sig_init(s, f, x); |
| 411 | if (buf_getu32(&b, &x) || buf_getu32(&b, &y)) |
| 412 | choke("missing datestamp", p); |
| 413 | SET64(t, x, y); s->t = GET64(time_t, t); |
| 414 | if (buf_getdstr16(&b, &s->kh)) |
| 415 | choke("missing key hash", p); |
| 416 | if (BLEFT(&b)) |
| 417 | choke("junk at end", p); |
| 418 | } |
| 419 | |
| 420 | static void sig_readsig(enc *e, sigmsg *s) |
| 421 | { |
| 422 | octet bb[MSGBUFSZ]; |
| 423 | size_t n; |
| 424 | |
| 425 | n = chunk_read(e, bb); |
| 426 | dstr_putm(&s->sig, bb, n); |
| 427 | } |
| 428 | |
| 429 | /*----- Signing -----------------------------------------------------------*/ |
| 430 | |
| 431 | static int sign(int argc, char *argv[]) |
| 432 | { |
| 433 | const char *ef = "binary", *fn = 0, *of = 0, *kn = "ccsig", *err; |
| 434 | unsigned f = 0; |
| 435 | key_file kf; |
| 436 | key *k; |
| 437 | sigmsg s; |
| 438 | FILE *ofp = 0; |
| 439 | int i; |
| 440 | char bb[MSGBUFSZ]; |
| 441 | size_t n; |
| 442 | dstr d = DSTR_INIT; |
| 443 | const encops *eo; |
| 444 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
| 445 | enc *e; |
| 446 | |
| 447 | for (;;) { |
| 448 | static const struct option opt[] = { |
| 449 | { "armour", 0, 0, 'a' }, |
| 450 | { "armor", 0, 0, 'a' }, |
| 451 | { "binary", 0, 0, 'b' }, |
| 452 | { "detach", 0, 0, 'd' }, |
| 453 | { "key", OPTF_ARGREQ, 0, 'k' }, |
| 454 | { "format", OPTF_ARGREQ, 0, 'f' }, |
| 455 | { "output", OPTF_ARGREQ, 0, 'o' }, |
| 456 | { "text", 0, 0, 't' }, |
| 457 | { "nocheck", 0, 0, 'C' }, |
| 458 | { 0, 0, 0, 0 } |
| 459 | }; |
| 460 | i = mdwopt(argc, argv, "k:f:o:abdtC", opt, 0, 0, 0); |
| 461 | if (i < 0) break; |
| 462 | switch (i) { |
| 463 | case 'k': kn = optarg; break; |
| 464 | case 'f': ef = optarg; break; |
| 465 | case 'o': of = optarg; break; |
| 466 | case 'a': ef = "pem"; break; |
| 467 | case 't': f &= ~F_BINARY; break; |
| 468 | case 'b': f |= F_BINARY; break; |
| 469 | case 'd': f |= F_DETACH; break; |
| 470 | case 'C': f |= F_NOCHECK; break; |
| 471 | default: f |= F_BOGUS; break; |
| 472 | } |
| 473 | } |
| 474 | if (argc - optind > 1 || (f & F_BOGUS)) |
| 475 | die(EXIT_FAILURE, "Usage: sign [-OPTIONS] [FILE]"); |
| 476 | |
| 477 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
| 478 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
| 479 | if ((k = key_bytag(&kf, kn)) == 0) |
| 480 | die(EXIT_FAILURE, "key `%s' not found", kn); |
| 481 | |
| 482 | if ((eo = getenc(ef)) == 0) |
| 483 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
| 484 | |
| 485 | fn = (optind >= argc) ? 0 : argv[optind++]; |
| 486 | |
| 487 | if (!of || strcmp(of, "-") == 0) |
| 488 | ofp = stdout; |
| 489 | else if ((ofp = fopen(of, eo->wmode)) == 0) { |
| 490 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
| 491 | ofp, strerror(errno)); |
| 492 | } |
| 493 | |
| 494 | /* --- Start the work --- */ |
| 495 | |
| 496 | sig_init(&s, f, k->id); |
| 497 | dstr_reset(&d); |
| 498 | key_fulltag(k, &d); |
| 499 | s.s = getsig(k, "ccsig", 1); |
| 500 | if (!(f & F_NOCHECK) && (err = s.s->ops->check(s.s)) != 0) |
| 501 | moan("key %s fails check: %s", d.buf, err); |
| 502 | keyhash(k, s.s, &s.kh); |
| 503 | e = initenc(eo, ofp, |
| 504 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
| 505 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
| 506 | "CATSIGN MESSAGE HEADER"); |
| 507 | sig_writeheader(e, &s); |
| 508 | |
| 509 | /* --- Hash the message --- */ |
| 510 | |
| 511 | mcsetup_readfile(&mc_in, f, fn); |
| 512 | mcsetup_write(&mc_out, f, &e); |
| 513 | sig_hash(&s); |
| 514 | for (;;) { |
| 515 | n = mc_in.read(&mc_in, bb); |
| 516 | if (!n) break; |
| 517 | dohash(s.s->h, bb, n); |
| 518 | mc_out.write(&mc_out, bb, n); |
| 519 | } |
| 520 | mc_endread(&mc_in, 0, 0); |
| 521 | mc_endwrite(&mc_out, eo, &e); |
| 522 | |
| 523 | /* --- Write the signature --- */ |
| 524 | |
| 525 | if (s.s->ops->doit(s.s, &s.sig)) |
| 526 | die(EXIT_FAILURE, "signature failed"); |
| 527 | sig_writesig(e, &s); |
| 528 | e->ops->encdone(e); |
| 529 | if (fflush(ofp) || ferror(ofp) || fclose(ofp)) |
| 530 | die(EXIT_FAILURE, "error writing signature: %s", strerror(errno)); |
| 531 | |
| 532 | /* --- All done --- */ |
| 533 | |
| 534 | freeenc(e); |
| 535 | key_close(&kf); |
| 536 | sig_destroy(&s); |
| 537 | dstr_destroy(&d); |
| 538 | return (0); |
| 539 | } |
| 540 | |
| 541 | /*----- Verifying ---------------------------------------------------------*/ |
| 542 | |
| 543 | typedef struct vrfctx { |
| 544 | unsigned f, m; |
| 545 | int verb; |
| 546 | const char *what; |
| 547 | } vrfctx; |
| 548 | |
| 549 | static int vrfbdry(const char *b, void *p) |
| 550 | { |
| 551 | vrfctx *v = p; |
| 552 | |
| 553 | if (strcmp(b, "CATSIGN MESSAGE") == 0) { |
| 554 | v->f |= F_BINARY; |
| 555 | v->m |= F_BINARY | F_DETACH; |
| 556 | return (1); |
| 557 | } else if (strcmp(b, "CATSIGN MESSAGE HEADER") == 0) { |
| 558 | v->m |= F_BINARY | F_DETACH; |
| 559 | return (1); |
| 560 | } else if (strcmp(b, "CATSIGN SIGNATURE") == 0) { |
| 561 | v->f |= F_DETACH; |
| 562 | v->m |= F_DETACH; |
| 563 | return (1); |
| 564 | } else |
| 565 | return (0); |
| 566 | } |
| 567 | |
| 568 | static void vrfchoke(const char *m, void *p) |
| 569 | { |
| 570 | vrfctx *v = p; |
| 571 | if (v->verb) printf("FAIL %s: %s\n", v->what, m); |
| 572 | exit(EXIT_FAILURE); |
| 573 | } |
| 574 | |
| 575 | static int verify(int argc, char *argv[]) |
| 576 | { |
| 577 | const char *ef = "binary", *of = 0, *dfn = 0, *kn = 0, *err; |
| 578 | vrfctx v = { 0, 0, 1 }; |
| 579 | key_file kf; |
| 580 | key *k, *kk = 0; |
| 581 | sigmsg s; |
| 582 | FILE *fp, *ofp = 0, *rfp = 0; |
| 583 | struct tm *tm; |
| 584 | int i; |
| 585 | char bb[MSGBUFSZ]; |
| 586 | size_t n; |
| 587 | time_t t_fresh = 0; |
| 588 | dstr d = DSTR_INIT, dd = DSTR_INIT; |
| 589 | const encops *eo; |
| 590 | msgcanon mc_in = MC_INIT; |
| 591 | enc *e; |
| 592 | |
| 593 | for (;;) { |
| 594 | static const struct option opt[] = { |
| 595 | { "armour", 0, 0, 'a' }, |
| 596 | { "armor", 0, 0, 'a' }, |
| 597 | { "buffer", 0, 0, 'b' }, |
| 598 | { "key", OPTF_ARGREQ, 0, 'k' }, |
| 599 | { "format", OPTF_ARGREQ, 0, 'f' }, |
| 600 | { "output", OPTF_ARGREQ, 0, 'o' }, |
| 601 | { "quiet", 0, 0, 'q' }, |
| 602 | { "utc", 0, 0, 'u' }, |
| 603 | { "fresh-time", 0, 0, 't' }, |
| 604 | { "gmt", 0, 0, 'u' }, |
| 605 | { "verbose", 0, 0, 'v' }, |
| 606 | { "nocheck", 0, 0, 'C' }, |
| 607 | { 0, 0, 0, 0 } |
| 608 | }; |
| 609 | i = mdwopt(argc, argv, "k:f:o:abqt:uvC", opt, 0, 0, 0); |
| 610 | if (i < 0) break; |
| 611 | switch (i) { |
| 612 | case 'a': ef = "pem"; break; |
| 613 | case 'b': v.f |= F_BUFFER; break; |
| 614 | case 'k': kn = optarg; break; |
| 615 | case 'f': ef = optarg; break; |
| 616 | case 'o': of = optarg; break; |
| 617 | case 'u': v.f |= F_UTC; break; |
| 618 | case 'C': v.f |= F_NOCHECK; break; |
| 619 | case 't': |
| 620 | if (strcmp(optarg, "always") == 0) t_fresh = 0; |
| 621 | else if ((t_fresh = get_date(optarg, 0)) < 0) |
| 622 | die(EXIT_FAILURE, "bad freshness time"); |
| 623 | break; |
| 624 | case 'q': if (v.verb > 0) v.verb--; break; |
| 625 | case 'v': if (v.verb < 10) v.verb++; break; |
| 626 | default: v.f |= F_BOGUS; break; |
| 627 | } |
| 628 | } |
| 629 | if (argc - optind > 2 || (v.f & F_BOGUS)) |
| 630 | die(EXIT_FAILURE, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]"); |
| 631 | |
| 632 | if ((eo = getenc(ef)) == 0) |
| 633 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
| 634 | |
| 635 | if (optind >= argc) |
| 636 | fp = stdin; |
| 637 | else if (strcmp(argv[optind], "-") == 0) { |
| 638 | fp = stdin; |
| 639 | optind++; |
| 640 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
| 641 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
| 642 | argv[optind], strerror(errno)); |
| 643 | } else |
| 644 | optind++; |
| 645 | |
| 646 | if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0)) |
| 647 | die(EXIT_FAILURE, "can't open keyring `%s'", keyring); |
| 648 | if (kn && (kk = key_bytag(&kf, kn)) == 0) |
| 649 | die(EXIT_FAILURE, "key `%s' not found", kn); |
| 650 | |
| 651 | e = initdec(eo, fp, vrfbdry, &v); |
| 652 | |
| 653 | /* --- Read the header chunk --- */ |
| 654 | |
| 655 | v.what = "malformed header"; |
| 656 | sig_readheader(e, &s, vrfchoke, &v); |
| 657 | |
| 658 | if (((s.f ^ v.f) & v.m) != 0) { |
| 659 | if (v.verb) printf("FAIL boundary string inconsistent with contents\n"); |
| 660 | exit(EXIT_FAILURE); |
| 661 | } |
| 662 | v.f |= s.f; |
| 663 | |
| 664 | if ((k = key_byid(&kf, s.keyid)) == 0) { |
| 665 | if (v.verb) printf("FAIL key id %08lx not found\n", |
| 666 | (unsigned long)s.keyid); |
| 667 | exit(EXIT_FAILURE); |
| 668 | } |
| 669 | if (kk && k->id != kk->id) { |
| 670 | if (v.verb) { |
| 671 | dstr_reset(&d); key_fulltag(k, &d); |
| 672 | dstr_reset(&dd); key_fulltag(kk, &dd); |
| 673 | printf("FAIL signing key is %s; expected key %s\n", d.buf, dd.buf); |
| 674 | } |
| 675 | exit(EXIT_FAILURE); |
| 676 | } |
| 677 | |
| 678 | s.s = getsig(k, "ccsig", 0); |
| 679 | dstr_reset(&d); key_fulltag(k, &d); |
| 680 | if (!(v.f & F_NOCHECK) && v.verb && (err = s.s->ops->check(s.s)) != 0) |
| 681 | printf("WARN verification key %s fails check: %s\n", d.buf, err); |
| 682 | |
| 683 | dstr_reset(&dd); keyhash(k, s.s, &dd); |
| 684 | if (dd.len != s.kh.len || memcmp(dd.buf, s.kh.buf, dd.len) != 0) { |
| 685 | if (v.verb) printf("FAIL key hash mismatch\n"); |
| 686 | exit(EXIT_FAILURE); |
| 687 | } |
| 688 | |
| 689 | /* --- Now a merry dance --- */ |
| 690 | |
| 691 | if (v.f & F_DETACH) |
| 692 | sig_readsig(e, &s); |
| 693 | if (optind < argc) |
| 694 | dfn = argv[optind++]; |
| 695 | mcsetup_read(&mc_in, v.f, &e, dfn); |
| 696 | |
| 697 | if (!of && (v.f & F_DETACH)) { |
| 698 | rfp = ofp = 0; |
| 699 | v.f &= ~F_BUFFER; |
| 700 | } else if (!of || strcmp(of, "-") == 0) { |
| 701 | v.f |= F_BUFFER; |
| 702 | ofp = stdout; |
| 703 | } |
| 704 | if (of && !(v.f & F_BUFFER)) { |
| 705 | if ((ofp = fopen(of, (v.f & F_BINARY) ? "wb" : "w")) == 0) { |
| 706 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
| 707 | of, strerror(errno)); |
| 708 | } |
| 709 | rfp = ofp; |
| 710 | } else if ((rfp = tmpfile()) == 0) |
| 711 | die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno)); |
| 712 | |
| 713 | /* --- Read the message and verify the signature --- */ |
| 714 | |
| 715 | sig_hash(&s); |
| 716 | for (;;) { |
| 717 | n = mc_in.read(&mc_in, bb); |
| 718 | if (!n) break; |
| 719 | dohash(s.s->h, bb, n); |
| 720 | if (rfp) fwrite(bb, 1, n, rfp); |
| 721 | } |
| 722 | mc_endread(&mc_in, eo, &e); |
| 723 | if (!(v.f & F_DETACH)) |
| 724 | sig_readsig(e, &s); |
| 725 | if (rfp && (ferror(rfp) || fflush(rfp))) { |
| 726 | if (v.verb) printf("FAIL error writing message: %s\n", strerror(errno)); |
| 727 | exit(EXIT_FAILURE); |
| 728 | } |
| 729 | |
| 730 | /* --- Check the signature --- */ |
| 731 | |
| 732 | if (s.s->ops->doit(s.s, &s.sig)) { |
| 733 | if (v.verb) printf("FAIL signature verification failed\n"); |
| 734 | exit(EXIT_FAILURE); |
| 735 | } |
| 736 | if (t_fresh && s.t < t_fresh) { |
| 737 | if (v.verb) printf("FAIL signature is stale\n"); |
| 738 | exit(EXIT_FAILURE); |
| 739 | } |
| 740 | if (s.t > time(0)) { |
| 741 | if (v.verb) printf("FAIL signature timestamp in the future\n"); |
| 742 | exit(EXIT_FAILURE); |
| 743 | } |
| 744 | if (v.verb) { |
| 745 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
| 746 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
| 747 | printf("INFO good-signature %s\n", d.buf); |
| 748 | printf("INFO date %s\n", bb); |
| 749 | } |
| 750 | |
| 751 | /* --- Unbuffer buffered input --- */ |
| 752 | |
| 753 | if (v.f & F_BUFFER) { |
| 754 | if (!ofp && (ofp = fopen(of, "wb")) == 0) { |
| 755 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
| 756 | of, strerror(errno)); |
| 757 | } |
| 758 | rewind(rfp); |
| 759 | if (v.verb && ofp == stdout) printf("DATA\n"); |
| 760 | for (;;) { |
| 761 | n = fread(bb, 1, sizeof(bb), rfp); |
| 762 | if (!n) break; |
| 763 | if (fwrite(bb, 1, n, ofp) < n) |
| 764 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
| 765 | } |
| 766 | if (ferror(rfp) || fclose(rfp)) |
| 767 | die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno)); |
| 768 | } |
| 769 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
| 770 | die(EXIT_FAILURE, "error writing output: %s", strerror(errno)); |
| 771 | |
| 772 | /* --- Tidy up --- */ |
| 773 | |
| 774 | e->ops->decdone(e); |
| 775 | if (v.verb && ofp != stdout) |
| 776 | printf("OK verified successfully\n"); |
| 777 | freeenc(e); |
| 778 | key_close(&kf); |
| 779 | sig_destroy(&s); |
| 780 | dstr_destroy(&d); |
| 781 | dstr_destroy(&dd); |
| 782 | return (0); |
| 783 | } |
| 784 | |
| 785 | /*----- Reformatting ------------------------------------------------------*/ |
| 786 | |
| 787 | static int format(int argc, char *argv[]) |
| 788 | { |
| 789 | const char *ief = "binary", *oef = "binary"; |
| 790 | const char *dfn = 0, *of = 0, *mf = 0; |
| 791 | sigmsg s; |
| 792 | FILE *fp, *ofp = 0, *mfp = 0; |
| 793 | int i; |
| 794 | size_t n; |
| 795 | msgcanon mc_in = MC_INIT, mc_out = MC_INIT; |
| 796 | char bb[MSGBUFSZ]; |
| 797 | vrfctx v = { 0, 0, 1 }; |
| 798 | unsigned f = 0, fm = ~F_SIGMASK, sf; |
| 799 | const encops *ieo, *oeo; |
| 800 | enc *ie, *oe; |
| 801 | |
| 802 | for (;;) { |
| 803 | static const struct option opt[] = { |
| 804 | { "armour-in", 0, 0, 'a' }, |
| 805 | { "armor-in", 0, 0, 'a' }, |
| 806 | { "armour-out", 0, 0, 'A' }, |
| 807 | { "armor-out", 0, 0, 'A' }, |
| 808 | { "detach", 0, 0, 'D' }, |
| 809 | { "embed", 0, 0, 'E' }, |
| 810 | { "format-in", OPTF_ARGREQ, 0, 'f' }, |
| 811 | { "format-out", OPTF_ARGREQ, 0, 'F' }, |
| 812 | { "message", OPTF_ARGREQ, 0, 'm' }, |
| 813 | { "output", OPTF_ARGREQ, 0, 'o' }, |
| 814 | { 0, 0, 0, 0 } |
| 815 | }; |
| 816 | i = mdwopt(argc, argv, "f:F:m:o:aADE", opt, 0, 0, 0); |
| 817 | if (i < 0) break; |
| 818 | switch (i) { |
| 819 | case 'a': ief = "pem"; break; |
| 820 | case 'A': oef = "pem"; break; |
| 821 | case 'f': ief = optarg; break; |
| 822 | case 'F': oef = optarg; break; |
| 823 | case 'D': f |= F_DETACH; fm |= F_DETACH; break; |
| 824 | case 'E': f &= ~F_DETACH; fm |= F_DETACH; break; |
| 825 | case 'm': mf = optarg; break; |
| 826 | case 'o': of = optarg; break; |
| 827 | default: f |= F_BOGUS; break; |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | if (argc - optind > 2 || (f & F_BOGUS)) |
| 832 | die(EXIT_FAILURE, "Usage: format [-OPTIONS] [FILE [MESSAGE]]"); |
| 833 | |
| 834 | if ((ieo = getenc(ief)) == 0) |
| 835 | die(EXIT_FAILURE, "encoding `%s' not found", ief); |
| 836 | if ((oeo = getenc(oef)) == 0) |
| 837 | die(EXIT_FAILURE, "encoding `%s' not found", oef); |
| 838 | |
| 839 | if (optind >= argc) |
| 840 | fp = stdin; |
| 841 | else if (strcmp(argv[optind], "-") == 0) { |
| 842 | fp = stdin; |
| 843 | optind++; |
| 844 | } else if ((fp = fopen(argv[optind], ieo->rmode)) == 0) { |
| 845 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
| 846 | argv[optind], strerror(errno)); |
| 847 | } else |
| 848 | optind++; |
| 849 | |
| 850 | if (optind < argc) |
| 851 | dfn = argv[optind++]; |
| 852 | |
| 853 | ie = initdec(ieo, fp, vrfbdry, &v); |
| 854 | |
| 855 | /* --- Read the header chunk --- */ |
| 856 | |
| 857 | sig_readheader(ie, &s, diechoke, "malformed header"); |
| 858 | |
| 859 | if (((s.f ^ v.f) & v.m) != 0) |
| 860 | moan("boundary string inconsistent with contents (ignoring)"); |
| 861 | |
| 862 | mcsetup_read(&mc_in, s.f, &ie, dfn); |
| 863 | |
| 864 | /* --- Prepare the output stuff --- */ |
| 865 | |
| 866 | if (!of && !mf) of = "-"; |
| 867 | sf = s.f; |
| 868 | f = (f & fm) | (s.f & ~fm); |
| 869 | s.f = f & F_SIGMASK; |
| 870 | |
| 871 | if (sf & F_DETACH) |
| 872 | sig_readsig(ie, &s); |
| 873 | |
| 874 | if (!of) |
| 875 | mcsetup_writenull(&mc_out); |
| 876 | else { |
| 877 | if (strcmp(of, "-") == 0) |
| 878 | ofp = stdout; |
| 879 | else if ((ofp = fopen(of, oeo->wmode)) == 0) { |
| 880 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
| 881 | of, strerror(errno)); |
| 882 | } |
| 883 | oe = initenc(oeo, ofp, |
| 884 | (f & F_DETACH) ? "CATSIGN SIGNATURE" : |
| 885 | (f & F_BINARY) ? "CATSIGN MESSAGE" : |
| 886 | "CATSIGN MESSAGE HEADER"); |
| 887 | sig_writeheader(oe, &s); |
| 888 | mcsetup_write(&mc_out, f, &oe); |
| 889 | } |
| 890 | |
| 891 | if (mf) { |
| 892 | if (strcmp(mf, "-") == 0) |
| 893 | mfp = stdout; |
| 894 | else if ((mfp = fopen(mf, (f & F_BINARY) ? "wb" : "w")) == 0) { |
| 895 | die(EXIT_FAILURE, "couldn't open file `%s' for output: %s", |
| 896 | mf, strerror(errno)); |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | /* --- Wade through the message body --- */ |
| 901 | |
| 902 | for (;;) { |
| 903 | n = mc_in.read(&mc_in, bb); |
| 904 | if (!n) break; |
| 905 | mc_out.write(&mc_out, bb, n); |
| 906 | if (mfp) fwrite(bb, 1, n, mfp); |
| 907 | } |
| 908 | mc_endread(&mc_in, ieo, &ie); |
| 909 | if (of) mc_endwrite(&mc_out, oeo, &oe); |
| 910 | |
| 911 | /* --- Write the signature --- */ |
| 912 | |
| 913 | if (!(sf & F_DETACH)) |
| 914 | sig_readsig(ie, &s); |
| 915 | if (of) { |
| 916 | sig_writesig(oe, &s); |
| 917 | oe->ops->encdone(oe); |
| 918 | } |
| 919 | |
| 920 | /* --- All done --- */ |
| 921 | |
| 922 | ie->ops->decdone(ie); |
| 923 | if (ferror(fp) || fclose(fp)) |
| 924 | die(EXIT_FAILURE, "error reading input signature: %s", strerror(errno)); |
| 925 | if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp))) |
| 926 | die(EXIT_FAILURE, "error writing output signature: %s", strerror(errno)); |
| 927 | if (mfp && (fflush(mfp) || ferror(mfp) || fclose(mfp))) |
| 928 | die(EXIT_FAILURE, "error writing output message: %s", strerror(errno)); |
| 929 | freeenc(ie); |
| 930 | if (of) freeenc(oe); |
| 931 | sig_destroy(&s); |
| 932 | return (0); |
| 933 | } |
| 934 | |
| 935 | static void infochoke(const char *m, void *p) |
| 936 | { |
| 937 | vrfctx *v = p; |
| 938 | printf("BAD %s: %s\n", v->what, m); |
| 939 | exit(EXIT_FAILURE); |
| 940 | } |
| 941 | |
| 942 | static void infokeyreport(const char *file, int line, |
| 943 | const char *err, void *p) |
| 944 | { /*whatever*/; } |
| 945 | |
| 946 | static int info(int argc, char *argv[]) |
| 947 | { |
| 948 | const char *ef = "binary"; |
| 949 | vrfctx v = { 0, 0, 1 }; |
| 950 | key_file kf; |
| 951 | key *k; |
| 952 | sigmsg s; |
| 953 | FILE *fp; |
| 954 | int i; |
| 955 | struct tm *tm; |
| 956 | char bb[256]; |
| 957 | dstr d = DSTR_INIT; |
| 958 | const encops *eo; |
| 959 | enc *e; |
| 960 | |
| 961 | for (;;) { |
| 962 | static const struct option opt[] = { |
| 963 | { "armour", 0, 0, 'a' }, |
| 964 | { "armor", 0, 0, 'a' }, |
| 965 | { "format", OPTF_ARGREQ, 0, 'f' }, |
| 966 | { "gmt", 0, 0, 'u' }, |
| 967 | { "utc", 0, 0, 'u' }, |
| 968 | { 0, 0, 0, 0 } |
| 969 | }; |
| 970 | i = mdwopt(argc, argv, "f:au", opt, 0, 0, 0); |
| 971 | if (i < 0) break; |
| 972 | switch (i) { |
| 973 | case 'a': ef = "pem"; break; |
| 974 | case 'f': ef = optarg; break; |
| 975 | case 'u': v.f |= F_UTC; break; |
| 976 | default: v.f |= F_BOGUS; break; |
| 977 | } |
| 978 | } |
| 979 | if (argc - optind > 1 || (v.f & F_BOGUS)) |
| 980 | die(EXIT_FAILURE, "Usage: info [-OPTIONS] [FILE]"); |
| 981 | |
| 982 | if ((eo = getenc(ef)) == 0) |
| 983 | die(EXIT_FAILURE, "encoding `%s' not found", ef); |
| 984 | |
| 985 | if (optind >= argc) |
| 986 | fp = stdin; |
| 987 | else if (strcmp(argv[optind], "-") == 0) { |
| 988 | fp = stdin; |
| 989 | optind++; |
| 990 | } else if ((fp = fopen(argv[optind], eo->rmode)) == 0) { |
| 991 | die(EXIT_FAILURE, "couldn't open file `%s': %s", |
| 992 | argv[optind], strerror(errno)); |
| 993 | } else |
| 994 | optind++; |
| 995 | |
| 996 | if (key_open(&kf, keyring, KOPEN_READ, infokeyreport, 0)) { |
| 997 | printf("NOTE can't open keyring `%s'\n", keyring); |
| 998 | keyring = 0; |
| 999 | } |
| 1000 | e = initdec(eo, fp, vrfbdry, &v); |
| 1001 | |
| 1002 | v.what = "malformed header"; |
| 1003 | sig_readheader(e, &s, infochoke, &v); |
| 1004 | |
| 1005 | printf("INFO flags %sdetach %sbinary\n", |
| 1006 | (s.f & F_DETACH) ? "" : "!", |
| 1007 | (s.f & F_BINARY) ? "" : "!"); |
| 1008 | |
| 1009 | if (((s.f ^ v.f) & v.m) != 0) { |
| 1010 | printf("WARN boundary string inconsistent with contents\n"); |
| 1011 | printf("INFO expected-flags"); |
| 1012 | if (v.m & F_DETACH) printf(" %sdetach", (v.f & F_DETACH) ? "" : "!"); |
| 1013 | if (v.m & F_BINARY) printf(" %sbinary", (v.f & F_BINARY) ? "" : "!"); |
| 1014 | putchar('\n'); |
| 1015 | } |
| 1016 | v.f |= s.f; |
| 1017 | |
| 1018 | tm = (v.f & F_UTC) ? gmtime(&s.t) : localtime(&s.t); |
| 1019 | strftime(bb, sizeof(bb), "%Y-%m-%d %H:%M:%S %Z", tm); |
| 1020 | printf("INFO date %s\n", bb); |
| 1021 | |
| 1022 | if (keyring && (k = key_byid(&kf, s.keyid)) != 0) { |
| 1023 | dstr_reset(&d); key_fulltag(k, &d); |
| 1024 | printf("INFO key %s\n", d.buf); |
| 1025 | } else |
| 1026 | printf("INFO unknown-key %08lx\n", (unsigned long)s.keyid); |
| 1027 | |
| 1028 | if (keyring) key_close(&kf); |
| 1029 | dstr_destroy(&d); |
| 1030 | sig_destroy(&s); |
| 1031 | return (0); |
| 1032 | } |
| 1033 | |
| 1034 | /*----- Main code ---------------------------------------------------------*/ |
| 1035 | |
| 1036 | #define LISTS(LI) \ |
| 1037 | LI("Lists", list, \ |
| 1038 | listtab[i].name, listtab[i].name) \ |
| 1039 | LI("Signature schemes", sig, \ |
| 1040 | sigtab[i].name, sigtab[i].name) \ |
| 1041 | LI("Encodings", enc, \ |
| 1042 | enctab[i].name, enctab[i].name) \ |
| 1043 | LI("Hash functions", hash, \ |
| 1044 | ghashtab[i], ghashtab[i]->name) |
| 1045 | |
| 1046 | MAKELISTTAB(listtab, LISTS) |
| 1047 | |
| 1048 | int cmd_show(int argc, char *argv[]) |
| 1049 | { |
| 1050 | return (displaylists(listtab, argv + 1)); |
| 1051 | } |
| 1052 | |
| 1053 | static int cmd_help(int, char **); |
| 1054 | |
| 1055 | static cmd cmdtab[] = { |
| 1056 | { "help", cmd_help, "help [COMMAND...]" }, |
| 1057 | { "show", cmd_show, "show [ITEM...]" }, |
| 1058 | CMD_ENCODE, |
| 1059 | CMD_DECODE, |
| 1060 | { "sign", sign, |
| 1061 | "sign [-adtC] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\ |
| 1062 | Options:\n\ |
| 1063 | \n\ |
| 1064 | -a, --armour Same as `-f pem'.\n\ |
| 1065 | -b, --binary Treat the input message as binary data.\n\ |
| 1066 | -d, --detach Produce a detached signature.\n\ |
| 1067 | -f, --format=FORMAT Encode as FORMAT.\n\ |
| 1068 | -k, --key=TAG Use public encryption key named by TAG.\n\ |
| 1069 | -o, --output=FILE Write output to FILE.\n\ |
| 1070 | -t, --text Canonify input message as a text file.\n\ |
| 1071 | -C, --nocheck Don't check the private key.\n\ |
| 1072 | " }, |
| 1073 | { "verify", verify, |
| 1074 | "verify [-abquvC] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\ |
| 1075 | [FILE [MESSAGE]]", "\ |
| 1076 | Options:\n\ |
| 1077 | \n\ |
| 1078 | -a, --armour Same as `-f pem'.\n\ |
| 1079 | -b, --buffer Buffer message until signature is verified.\n\ |
| 1080 | -f, --format=FORMAT Decode as FORMAT.\n\ |
| 1081 | -k, --key=TAG Require that the message be signed by key TAG.\n\ |
| 1082 | -o, --output=FILE Write message to FILE.\n\ |
| 1083 | -q, --quiet Produce fewer messages.\n\ |
| 1084 | -t, --freshtime=TIME Only accept signatures made after this time.\n\ |
| 1085 | -u, --utc Show dates in UTC rather than local time.\n\ |
| 1086 | -v, --verbose Produce more verbose messages.\n\ |
| 1087 | -C, --nocheck Don't check the public key.\n\ |
| 1088 | " }, |
| 1089 | { "info", info, |
| 1090 | "info [-au] [-f FORMAT] [FILE]", "\ |
| 1091 | Options:\n\ |
| 1092 | \n\ |
| 1093 | -a, --armour Same as `-f pem'.\n\ |
| 1094 | -f, --format=FORMAT Decode as FORMAT.\n\ |
| 1095 | -u, --utc Show dates in UTC rather than local time.\n\ |
| 1096 | "}, |
| 1097 | { "format", format, |
| 1098 | "format [-auADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\ |
| 1099 | [FILE [MESSAGE]]", "\ |
| 1100 | Options:\n\ |
| 1101 | \n\ |
| 1102 | -a, --armour-in Same as `-f pem'.\n\ |
| 1103 | -A, --armour-out Same as `-F pem'.\n\ |
| 1104 | -D, --detach Create detached signature.\n\ |
| 1105 | -E, --embed Create signature with embedded message.\n\ |
| 1106 | -f, --format-in=FORMAT Decode input as FORMAT.\n\ |
| 1107 | -F, --format-out=FORMAT Encode output as FORMAT.\n\ |
| 1108 | -m, --message=FILE Write message to FILE.\n\ |
| 1109 | -o, --output=FILE Write new signature to FILE.\n\ |
| 1110 | "}, |
| 1111 | { 0, 0, 0 } |
| 1112 | }; /* " Emacs seems confused. */ |
| 1113 | |
| 1114 | static int cmd_help(int argc, char **argv) |
| 1115 | { |
| 1116 | sc_help(cmdtab, stdout, argv + 1); |
| 1117 | return (0); |
| 1118 | } |
| 1119 | |
| 1120 | void version(FILE *fp) |
| 1121 | { |
| 1122 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
| 1123 | } |
| 1124 | |
| 1125 | static void usage(FILE *fp) |
| 1126 | { |
| 1127 | pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n"); |
| 1128 | } |
| 1129 | |
| 1130 | void help_global(FILE *fp) |
| 1131 | { |
| 1132 | usage(fp); |
| 1133 | fputs("\n\ |
| 1134 | Sign and verify data.\n\ |
| 1135 | \n\ |
| 1136 | Global command-line options:\n\ |
| 1137 | \n\ |
| 1138 | -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\ |
| 1139 | -v, --version Show program version number.\n\ |
| 1140 | -u, --usage Show a terse usage message.\n\ |
| 1141 | \n\ |
| 1142 | -k, --keyring=FILE Read keys from FILE.\n", |
| 1143 | fp); |
| 1144 | } |
| 1145 | |
| 1146 | /* --- @main@ --- * |
| 1147 | * |
| 1148 | * Arguments: @int argc@ = number of command line arguments |
| 1149 | * @char *argv[]@ = vector of command line arguments |
| 1150 | * |
| 1151 | * Returns: Zero if successful, nonzero otherwise. |
| 1152 | * |
| 1153 | * Use: Encrypts or decrypts files. |
| 1154 | */ |
| 1155 | |
| 1156 | int main(int argc, char *argv[]) |
| 1157 | { |
| 1158 | unsigned f = 0; |
| 1159 | |
| 1160 | #define f_bogus 1u |
| 1161 | |
| 1162 | /* --- Initialize the library --- */ |
| 1163 | |
| 1164 | ego(argv[0]); |
| 1165 | sub_init(); |
| 1166 | rand_noisesrc(RAND_GLOBAL, &noise_source); |
| 1167 | rand_seed(RAND_GLOBAL, 160); |
| 1168 | /* trace_on(stderr, 1); */ |
| 1169 | |
| 1170 | /* --- Parse options --- */ |
| 1171 | |
| 1172 | for (;;) { |
| 1173 | static struct option opts[] = { |
| 1174 | { "help", 0, 0, 'h' }, |
| 1175 | { "version", 0, 0, 'v' }, |
| 1176 | { "usage", 0, 0, 'u' }, |
| 1177 | { "keyring", OPTF_ARGREQ, 0, 'k' }, |
| 1178 | { 0, 0, 0, 0 } |
| 1179 | }; |
| 1180 | int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0); |
| 1181 | if (i < 0) |
| 1182 | break; |
| 1183 | switch (i) { |
| 1184 | case 'h': |
| 1185 | sc_help(cmdtab, stdout, argv + optind); |
| 1186 | exit(0); |
| 1187 | break; |
| 1188 | case 'v': |
| 1189 | version(stdout); |
| 1190 | exit(0); |
| 1191 | break; |
| 1192 | case 'u': |
| 1193 | usage(stdout); |
| 1194 | exit(0); |
| 1195 | case 'k': |
| 1196 | keyring = optarg; |
| 1197 | break; |
| 1198 | default: |
| 1199 | f |= f_bogus; |
| 1200 | break; |
| 1201 | } |
| 1202 | } |
| 1203 | |
| 1204 | argc -= optind; |
| 1205 | argv += optind; |
| 1206 | optind = 0; |
| 1207 | if (f & f_bogus || argc < 1) { |
| 1208 | usage(stderr); |
| 1209 | exit(EXIT_FAILURE); |
| 1210 | } |
| 1211 | |
| 1212 | /* --- Dispatch to the correct subcommand handler --- */ |
| 1213 | |
| 1214 | return (findcmd(cmdtab, argv[0])->cmd(argc, argv)); |
| 1215 | |
| 1216 | #undef f_bogus |
| 1217 | } |
| 1218 | |
| 1219 | /*----- That's all, folks -------------------------------------------------*/ |