5 * (c) 2005 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
30 #define _FILE_OFFSET_BITS 64
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>
59 /*----- Static variables --------------------------------------------------*/
61 static const char *keyring
= "keyring";
63 /*----- Data formats ------------------------------------------------------*
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.
75 typedef struct sigmsg
{
76 unsigned f
; /* Flags */
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 */
94 #define F_NOCHECK 1024u
95 #define F_PROGRESS 2048u
97 /*----- Chunk I/O ---------------------------------------------------------*/
99 static void chunk_write(enc
*e
, const void *p
, size_t n
)
105 if (e
->ops
->write(e
, b
, 2) || e
->ops
->write(e
, p
, n
))
106 die(EXIT_FAILURE
, "error writing output: %s", strerror(errno
));
109 static size_t chunk_read(enc
*e
, void *p
)
114 if (e
->ops
->read(e
, b
, 2) != 2)
117 if (n
&& e
->ops
->read(e
, p
, n
) != n
)
122 if (!errno
) die(EXIT_FAILURE
, "unexpected end-of-file on input");
123 else die(EXIT_FAILURE
, "error reading input: %s", strerror(errno
));
127 /*----- Message canonification --------------------------------------------*/
129 #define MSGBUFSZ 65536
130 #define MSGBUFTHRESH 32768
132 typedef struct msgcanon
{
137 size_t (*read
)(struct msgcanon
*, void *);
138 void (*write
)(struct msgcanon
*, const void *, size_t);
139 void (*close
)(struct msgcanon
*);
142 #define MC_INIT { 0 }
144 static size_t textread(msgcanon
*m
, void *bp
)
146 size_t n
= 0, nsp
= 0;
151 if (f
& F_EOF
) return (0);
153 if ((ch
= getc(m
->fp
)) == EOF
) goto eof
;
154 if (!(f
& (F_DETACH
| F_MIDLINE
)) && ch
== '.') {
156 if (ch
== '\n') goto eof
;
160 if (n
>= MSGBUFTHRESH
) goto full
;
163 } else if (isspace(ch
)) {
165 if (n
>= MSGBUFSZ
) goto full
;
170 if (n
>= MSGBUFTHRESH
) goto full
;
181 if (m
->f
& F_PROGRESS
) fprogress_update(&m
->ff
, n
);
185 static void textwrite(msgcanon
*m
, const void *bp
, size_t n
)
187 const char *p
= bp
, *l
= p
+ n
;
191 if (!(f
& (F_MIDLINE
| F_DETACH
)) &&
192 (*p
== '.' || *p
== '-'))
194 if (*p
== '\n') f
&= ~F_MIDLINE
;
202 static size_t binreadembed(msgcanon
*m
, void *bp
)
204 size_t n
= chunk_read(m
->e
, bp
);
205 if (m
->f
& F_PROGRESS
) fprogress_update(&m
->ff
, n
);
209 static size_t binreaddetach(msgcanon
*m
, void *bp
)
211 size_t n
= fread(bp
, 1, MSGBUFSZ
- 1, m
->fp
);
212 if (m
->f
& F_PROGRESS
) fprogress_update(&m
->ff
, n
);
216 static void binwriteembed(msgcanon
*m
, const void *bp
, size_t n
)
217 { chunk_write(m
->e
, bp
, n
); }
219 static void nullwrite(msgcanon
*m
, const void *bp
, size_t n
) { ; }
221 static void mcsetup_readfile(msgcanon
*m
, unsigned f
, const char *fn
)
223 m
->f
= F_DETACH
| (f
& (F_BINARY
| F_PROGRESS
));
224 if (!fn
|| strcmp(fn
, "-") == 0) {
227 } else if ((m
->fp
= fopen(fn
, (f
& F_BINARY
) ?
"rb" : "r")) == 0)
228 die(EXIT_FAILURE
, "couldn't open file `%s': %s", fn
, strerror(errno
));
229 if (m
->f
& F_PROGRESS
) {
230 if (fprogress_init(&m
->ff
, fn
, m
->fp
)) {
231 die(EXIT_FAILURE
, "failed to initialize progress indicator: %s",
235 m
->read
= (f
& F_BINARY
) ? binreaddetach
: textread
;
238 static void mcsetup_writenull(msgcanon
*m
) { m
->write
= nullwrite
; }
240 static void mcsetup_read(msgcanon
*m
, unsigned f
, enc
**ee
,
241 const char *fn
, const char *dfn
)
245 m
->f
= f
| F_NOCLOSE
;
247 if (dfn
&& !(f
& F_DETACH
)) die(EXIT_FAILURE
, "signature is not detached");
249 if (!(f
& F_DETACH
)) {
253 m
->read
= binreadembed
;
254 if (m
->f
& F_PROGRESS
) {
255 if (fprogress_init(&m
->ff
, fn
, m
->fp
)) {
256 die(EXIT_FAILURE
, "failed to initialize progress indicator: %s",
261 m
->read
= binreaddetach
;
262 if (!dfn
|| strcmp(dfn
, "-") == 0)
264 else if ((m
->fp
= fopen(dfn
, "rb")) == 0)
265 die(EXIT_FAILURE
, "can't open `%s': %s", dfn
, strerror(errno
));
268 if (m
->f
& F_PROGRESS
) {
269 if (fprogress_init(&m
->ff
, dfn
, m
->fp
)) {
270 die(EXIT_FAILURE
, "failed to initialize progress indicator: %s",
277 if (!(f
& F_DETACH
)) {
278 if (e
->ops
->decdone(e
) || ferror(e
->fp
))
279 die(EXIT_FAILURE
, "error at end of signature header");
283 if (m
->f
& F_PROGRESS
) {
284 if (fprogress_init(&m
->ff
, fn
, m
->fp
)) {
285 die(EXIT_FAILURE
, "failed to initialize progress indicator: %s",
290 if (!dfn
|| strcmp(dfn
, "-") == 0)
292 else if ((m
->fp
= fopen(dfn
, "r")) == 0)
293 die(EXIT_FAILURE
, "can't read file `%s': %s", dfn
, strerror(errno
));
296 if (m
->f
& F_PROGRESS
) {
297 if (fprogress_init(&m
->ff
, dfn
, m
->fp
)) {
298 die(EXIT_FAILURE
, "failed to initialize progress indicator: %s",
306 static void mcsetup_write(msgcanon
*m
, unsigned f
, enc
**ee
)
310 m
->f
= f
| F_NOCLOSE
;
313 m
->write
= nullwrite
;
314 else if (f
& F_BINARY
) {
318 m
->write
= binwriteembed
;
320 if (e
->ops
->encdone(e
) || ferror(e
->fp
))
321 die(EXIT_FAILURE
, "error at end of signature header");
325 m
->write
= textwrite
;
329 static void mc_endread(msgcanon
*m
, const encops
*eops
, enc
**ee
)
331 if (!(m
->f
& F_DETACH
)) {
335 *ee
= initdec(eops
, m
->fp
, checkbdry
, "CATSIGN SIGNATURE");
337 if (m
->fp
&& !(m
->f
& F_NOCLOSE
)) {
338 if (ferror(m
->fp
) || fclose(m
->fp
))
339 die(EXIT_FAILURE
, "error closing message file: %s", strerror(errno
));
341 if (m
->f
& F_PROGRESS
) fprogress_done(&m
->ff
);
344 static void mc_endwrite(msgcanon
*m
, const encops
*eops
, enc
**ee
)
346 if (!(m
->f
& F_BINARY
)) {
347 if (m
->f
& F_MIDLINE
) putc('\n', m
->fp
);
348 if (!(m
->f
& F_DETACH
)) {
349 putc('.', m
->fp
); putc('\n', m
->fp
);
350 *ee
= initenc(eops
, m
->fp
, "CATSIGN SIGNATURE");
352 } else if (!(m
->f
& F_DETACH
)) {
353 chunk_write(m
->e
, 0, 0);
356 if (m
->fp
&& !(m
->f
& F_NOCLOSE
)) {
357 if (fflush(m
->fp
) || ferror(m
->fp
) || fclose(m
->fp
))
358 die(EXIT_FAILURE
, "error closing message file: %s", strerror(errno
));
362 /*----- Signature reading and writing -------------------------------------*/
364 static void sig_init(sigmsg
*s
, unsigned f
, uint32 keyid
)
366 s
->f
= f
& F_SIGMASK
;
371 dstr_create(&s
->sig
);
374 static void sig_destroy(sigmsg
*s
)
376 dstr_destroy(&s
->kh
);
377 dstr_destroy(&s
->sig
);
378 if (s
->s
) freesig(s
->s
);
381 static void sigtobuffer(sigmsg
*s
, buf
*b
, int hashp
)
386 if (hashp
) buf_putu16(b
, s
->f
& F_HASHMASK
);
387 else buf_putu16(b
, s
->f
& F_SIGMASK
);
388 buf_putu32(b
, s
->keyid
);
389 buf_putu32(b
, HI64(t
));
390 buf_putu32(b
, LO64(t
));
391 buf_putdstr16(b
, &s
->kh
);
395 static void dohash(ghash
*h
, const void *p
, size_t n
)
400 static void sig_hash(sigmsg
*s
)
405 buf_init(&b
, bb
, sizeof(bb
));
406 sigtobuffer(s
, &b
, 1);
407 dohash(s
->s
->h
, BBASE(&b
), BLEN(&b
));
410 static void keyhash(key
*k
, sig
*s
, dstr
*d
)
418 key_fingerprint(k
, h
, &kf
);
419 dstr_ensure(d
, GH_CLASS(h
)->hashsz
);
420 GH_DONE(h
, d
->buf
+ d
->len
);
421 d
->len
+= GH_CLASS(h
)->hashsz
;
425 static void sig_writeheader(enc
*e
, sigmsg
*s
)
430 buf_init(&b
, bb
, sizeof(bb
));
431 sigtobuffer(s
, &b
, 0);
432 chunk_write(e
, BBASE(&b
), BLEN(&b
));
435 static void sig_writesig(enc
*e
, sigmsg
*s
)
436 { chunk_write(e
, s
->sig
.buf
, s
->sig
.len
); }
438 static void diechoke(const char *m
, void *p
)
439 { die(EXIT_FAILURE
, "%s%s%s", (const char *)p
, p ?
": " : "", m
); }
441 static void sig_readheader(enc
*e
, sigmsg
*s
,
442 void (*choke
)(const char *, void *), void *p
)
451 n
= chunk_read(e
, bb
);
453 if (buf_getu16(&b
, &f
)) choke("missing flags", p
);
454 if (buf_getu32(&b
, &x
)) choke("missing keyid", p
);
456 if (buf_getu32(&b
, &x
) || buf_getu32(&b
, &y
))
457 choke("missing datestamp", p
);
458 SET64(t
, x
, y
); s
->t
= GET64(time_t, t
);
459 if (buf_getdstr16(&b
, &s
->kh
))
460 choke("missing key hash", p
);
462 choke("junk at end", p
);
465 static void sig_readsig(enc
*e
, sigmsg
*s
)
470 n
= chunk_read(e
, bb
);
471 dstr_putm(&s
->sig
, bb
, n
);
474 /*----- Signing -----------------------------------------------------------*/
476 static int sign(int argc
, char *argv
[])
478 const char *ef
= "binary", *fn
= 0, *of
= 0, *kn
= "ccsig", *err
;
489 msgcanon mc_in
= MC_INIT
, mc_out
= MC_INIT
;
493 static const struct option opt
[] = {
494 { "armour", 0, 0, 'a' },
495 { "armor", 0, 0, 'a' },
496 { "binary", 0, 0, 'b' },
497 { "detach", 0, 0, 'd' },
498 { "key", OPTF_ARGREQ
, 0, 'k' },
499 { "format", OPTF_ARGREQ
, 0, 'f' },
500 { "output", OPTF_ARGREQ
, 0, 'o' },
501 { "progress", 0, 0, 'p' },
502 { "text", 0, 0, 't' },
503 { "nocheck", 0, 0, 'C' },
506 i
= mdwopt(argc
, argv
, "k:f:o:abdptC", opt
, 0, 0, 0);
509 case 'k': kn
= optarg
; break;
510 case 'f': ef
= optarg
; break;
511 case 'o': of
= optarg
; break;
512 case 'a': ef
= "pem"; break;
513 case 't': f
&= ~F_BINARY
; break;
514 case 'b': f
|= F_BINARY
; break;
515 case 'd': f
|= F_DETACH
; break;
516 case 'C': f
|= F_NOCHECK
; break;
517 case 'p': f
|= F_PROGRESS
; break;
518 default: f
|= F_BOGUS
; break;
521 if (argc
- optind
> 1 || (f
& F_BOGUS
))
522 die(EXIT_FAILURE
, "Usage: sign [-OPTIONS] [FILE]");
524 if (key_open(&kf
, keyring
, KOPEN_READ
, key_moan
, 0))
525 die(EXIT_FAILURE
, "can't open keyring `%s'", keyring
);
526 if ((k
= key_bytag(&kf
, kn
)) == 0)
527 die(EXIT_FAILURE
, "key `%s' not found", kn
);
529 if ((eo
= getenc(ef
)) == 0)
530 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
532 fn
= (optind
>= argc
) ?
0 : argv
[optind
++];
534 if (!of
|| strcmp(of
, "-") == 0)
536 else if ((ofp
= fopen(of
, eo
->wmode
)) == 0) {
537 die(EXIT_FAILURE
, "couldn't open file `%s' for output: %s",
538 of
, strerror(errno
));
541 /* --- Start the work --- */
543 sig_init(&s
, f
, k
->id
);
546 s
.s
= getsig(k
, "ccsig", 1);
547 if (!(f
& F_NOCHECK
) && (err
= s
.s
->ops
->check(s
.s
)) != 0)
548 moan("key %s fails check: %s", d
.buf
, err
);
549 keyhash(k
, s
.s
, &s
.kh
);
551 (f
& F_DETACH
) ?
"CATSIGN SIGNATURE" :
552 (f
& F_BINARY
) ?
"CATSIGN MESSAGE" :
553 "CATSIGN MESSAGE HEADER");
554 sig_writeheader(e
, &s
);
556 /* --- Hash the message --- */
558 mcsetup_readfile(&mc_in
, f
, fn
);
559 mcsetup_write(&mc_out
, f
, &e
);
562 n
= mc_in
.read(&mc_in
, bb
);
564 dohash(s
.s
->h
, bb
, n
);
565 mc_out
.write(&mc_out
, bb
, n
);
567 mc_endread(&mc_in
, 0, 0);
568 mc_endwrite(&mc_out
, eo
, &e
);
570 /* --- Write the signature --- */
572 if (s
.s
->ops
->doit(s
.s
, &s
.sig
))
573 die(EXIT_FAILURE
, "signature failed");
576 if (fflush(ofp
) || ferror(ofp
) || fclose(ofp
))
577 die(EXIT_FAILURE
, "error writing signature: %s", strerror(errno
));
579 /* --- All done --- */
588 /*----- Verifying ---------------------------------------------------------*/
590 typedef struct vrfctx
{
596 static int vrfbdry(const char *b
, void *p
)
600 if (strcmp(b
, "CATSIGN MESSAGE") == 0) {
602 v
->m
|= F_BINARY
| F_DETACH
;
604 } else if (strcmp(b
, "CATSIGN MESSAGE HEADER") == 0) {
605 v
->m
|= F_BINARY
| F_DETACH
;
607 } else if (strcmp(b
, "CATSIGN SIGNATURE") == 0) {
615 static void vrfchoke(const char *m
, void *p
)
618 if (v
->verb
) printf("FAIL %s: %s\n", v
->what
, m
);
622 static int verify(int argc
, char *argv
[])
624 const char *ef
= "binary", *of
= 0, *fn
, *dfn
= 0, *kn
= 0, *err
;
625 vrfctx v
= { 0, 0, 1 };
629 FILE *fp
, *ofp
= 0, *rfp
= 0;
636 dstr d
= DSTR_INIT
, dd
= DSTR_INIT
;
638 msgcanon mc_in
= MC_INIT
;
642 static const struct option opt
[] = {
643 { "armour", 0, 0, 'a' },
644 { "armor", 0, 0, 'a' },
645 { "buffer", 0, 0, 'b' },
646 { "key", OPTF_ARGREQ
, 0, 'k' },
647 { "format", OPTF_ARGREQ
, 0, 'f' },
648 { "output", OPTF_ARGREQ
, 0, 'o' },
649 { "progress", 0, 0, 'p' },
650 { "quiet", 0, 0, 'q' },
651 { "utc", 0, 0, 'u' },
652 { "fresh-time", 0, 0, 't' },
653 { "gmt", 0, 0, 'u' },
654 { "verbose", 0, 0, 'v' },
655 { "nocheck", 0, 0, 'C' },
658 i
= mdwopt(argc
, argv
, "k:f:o:abpqt:uvC", opt
, 0, 0, 0);
661 case 'a': ef
= "pem"; break;
662 case 'b': v
.f
|= F_BUFFER
; break;
663 case 'k': kn
= optarg
; break;
664 case 'f': ef
= optarg
; break;
665 case 'o': of
= optarg
; break;
666 case 'u': v
.f
|= F_UTC
; break;
667 case 'C': v
.f
|= F_NOCHECK
; break;
669 if (strcmp(optarg
, "always") == 0) t_fresh
= 0;
670 else if ((t_fresh
= get_date(optarg
, 0)) < 0)
671 die(EXIT_FAILURE
, "bad freshness time");
673 case 'q': if (v
.verb
> 0) v
.verb
--; break;
674 case 'v': if (v
.verb
< 10) v
.verb
++; break;
675 case 'p': v
.f
|= F_PROGRESS
; break;
676 default: v
.f
|= F_BOGUS
; break;
679 if (argc
- optind
> 2 || (v
.f
& F_BOGUS
))
680 die(EXIT_FAILURE
, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]");
682 if ((eo
= getenc(ef
)) == 0)
683 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
685 fn
= optind
< argc ? argv
[optind
++] : "-";
686 if (strcmp(fn
, "-") == 0)
688 else if ((fp
= fopen(fn
, eo
->rmode
)) == 0) {
689 die(EXIT_FAILURE
, "couldn't open file `%s': %s",
690 fn
, strerror(errno
));
693 if (key_open(&kf
, keyring
, KOPEN_READ
, key_moan
, 0))
694 die(EXIT_FAILURE
, "can't open keyring `%s'", keyring
);
695 if (kn
&& (kk
= key_bytag(&kf
, kn
)) == 0)
696 die(EXIT_FAILURE
, "key `%s' not found", kn
);
698 e
= initdec(eo
, fp
, vrfbdry
, &v
);
700 /* --- Read the header chunk --- */
702 v
.what
= "malformed header";
703 sig_readheader(e
, &s
, vrfchoke
, &v
);
705 if (((s
.f
^ v
.f
) & v
.m
) != 0) {
706 if (v
.verb
) printf("FAIL boundary string inconsistent with contents\n");
711 if ((k
= key_byid(&kf
, s
.keyid
)) == 0) {
712 if (v
.verb
) printf("FAIL key id %08lx not found\n",
713 (unsigned long)s
.keyid
);
716 if (kk
&& k
->id
!= kk
->id
) {
718 dstr_reset(&d
); key_fulltag(k
, &d
);
719 dstr_reset(&dd
); key_fulltag(kk
, &dd
);
720 printf("FAIL signing key is %s; expected key %s\n", d
.buf
, dd
.buf
);
725 s
.s
= getsig(k
, "ccsig", 0);
726 dstr_reset(&d
); key_fulltag(k
, &d
);
727 if (!(v
.f
& F_NOCHECK
) && v
.verb
&& (err
= s
.s
->ops
->check(s
.s
)) != 0)
728 printf("WARN verification key %s fails check: %s\n", d
.buf
, err
);
730 dstr_reset(&dd
); keyhash(k
, s
.s
, &dd
);
731 if (dd
.len
!= s
.kh
.len
|| memcmp(dd
.buf
, s
.kh
.buf
, dd
.len
) != 0) {
732 if (v
.verb
) printf("FAIL key hash mismatch\n");
736 /* --- Now a merry dance --- */
741 dfn
= argv
[optind
++];
742 mcsetup_read(&mc_in
, v
.f
, &e
, fn
, dfn
);
744 if (!of
&& (v
.f
& F_DETACH
)) {
747 } else if (!of
|| strcmp(of
, "-") == 0) {
751 if (of
&& !(v
.f
& F_BUFFER
)) {
752 if ((ofp
= fopen(of
, (v
.f
& F_BINARY
) ?
"wb" : "w")) == 0) {
753 die(EXIT_FAILURE
, "couldn't open file `%s' for output: %s",
754 of
, strerror(errno
));
757 } else if ((rfp
= tmpfile()) == 0)
758 die(EXIT_FAILURE
, "couldn't create temporary file: %s", strerror(errno
));
760 /* --- Read the message and verify the signature --- */
764 n
= mc_in
.read(&mc_in
, bb
);
766 dohash(s
.s
->h
, bb
, n
);
767 if (rfp
) fwrite(bb
, 1, n
, rfp
);
769 mc_endread(&mc_in
, eo
, &e
);
770 if (!(v
.f
& F_DETACH
))
772 if (rfp
&& (ferror(rfp
) || fflush(rfp
))) {
773 if (v
.verb
) printf("FAIL error writing message: %s\n", strerror(errno
));
777 /* --- Check the signature --- */
779 if (s
.s
->ops
->doit(s
.s
, &s
.sig
)) {
780 if (v
.verb
) printf("FAIL signature verification failed\n");
783 if (t_fresh
&& s
.t
< t_fresh
) {
784 if (v
.verb
) printf("FAIL signature is stale\n");
788 if (v
.verb
) printf("FAIL signature timestamp in the future\n");
792 tm
= (v
.f
& F_UTC
) ?
gmtime(&s
.t
) : localtime(&s
.t
);
793 strftime(bb
, sizeof(bb
), "%Y-%m-%d %H:%M:%S %Z", tm
);
794 printf("INFO good-signature %s\n", d
.buf
);
795 printf("INFO date %s\n", bb
);
798 /* --- Unbuffer buffered input --- */
800 if (v
.f
& F_BUFFER
) {
801 if (!ofp
&& (ofp
= fopen(of
, "wb")) == 0) {
802 die(EXIT_FAILURE
, "couldn't open file `%s' for output: %s",
803 of
, strerror(errno
));
806 if (v
.f
& F_PROGRESS
) fprogress_init(&ff
, "copying buffer", rfp
);
807 if (v
.verb
&& ofp
== stdout
) printf("DATA\n");
809 n
= fread(bb
, 1, sizeof(bb
), rfp
);
811 if (v
.f
& F_PROGRESS
) fprogress_update(&ff
, n
);
812 if (fwrite(bb
, 1, n
, ofp
) < n
) {
813 if (v
.f
& F_PROGRESS
) fprogress_done(&ff
);
814 die(EXIT_FAILURE
, "error writing output: %s", strerror(errno
));
817 if (v
.f
& F_PROGRESS
) fprogress_done(&ff
);
818 if (ferror(rfp
) || fclose(rfp
))
819 die(EXIT_FAILURE
, "error unbuffering output: %s", strerror(errno
));
821 if (ofp
&& (fflush(ofp
) || ferror(ofp
) || fclose(ofp
)))
822 die(EXIT_FAILURE
, "error writing output: %s", strerror(errno
));
824 /* --- Tidy up --- */
827 if (v
.verb
&& ofp
!= stdout
)
828 printf("OK verified successfully\n");
837 /*----- Reformatting ------------------------------------------------------*/
839 static int format(int argc
, char *argv
[])
841 const char *ief
= "binary", *oef
= "binary";
842 const char *fn
, *dfn
= 0, *of
= 0, *mf
= 0;
844 FILE *fp
, *ofp
= 0, *mfp
= 0;
847 msgcanon mc_in
= MC_INIT
, mc_out
= MC_INIT
;
849 vrfctx v
= { 0, 0, 1 };
850 unsigned f
= 0, fm
= ~F_SIGMASK
, sf
;
851 const encops
*ieo
, *oeo
;
855 static const struct option opt
[] = {
856 { "armour-in", 0, 0, 'a' },
857 { "armor-in", 0, 0, 'a' },
858 { "armour-out", 0, 0, 'A' },
859 { "armor-out", 0, 0, 'A' },
860 { "detach", 0, 0, 'D' },
861 { "embed", 0, 0, 'E' },
862 { "format-in", OPTF_ARGREQ
, 0, 'f' },
863 { "format-out", OPTF_ARGREQ
, 0, 'F' },
864 { "message", OPTF_ARGREQ
, 0, 'm' },
865 { "output", OPTF_ARGREQ
, 0, 'o' },
866 { "progress", 0, 0, 'p' },
869 i
= mdwopt(argc
, argv
, "f:F:m:o:apADE", opt
, 0, 0, 0);
872 case 'a': ief
= "pem"; break;
873 case 'A': oef
= "pem"; break;
874 case 'f': ief
= optarg
; break;
875 case 'F': oef
= optarg
; break;
876 case 'D': f
|= F_DETACH
; fm
|= F_DETACH
; break;
877 case 'E': f
&= ~F_DETACH
; fm
|= F_DETACH
; break;
878 case 'm': mf
= optarg
; break;
879 case 'o': of
= optarg
; break;
880 case 'p': f
|= F_PROGRESS
; break;
881 default: f
|= F_BOGUS
; break;
885 if (argc
- optind
> 2 || (f
& F_BOGUS
))
886 die(EXIT_FAILURE
, "Usage: format [-OPTIONS] [FILE [MESSAGE]]");
888 if ((ieo
= getenc(ief
)) == 0)
889 die(EXIT_FAILURE
, "encoding `%s' not found", ief
);
890 if ((oeo
= getenc(oef
)) == 0)
891 die(EXIT_FAILURE
, "encoding `%s' not found", oef
);
893 fn
= optind
< argc ? argv
[optind
++] : "-";
894 if (strcmp(fn
, "-") == 0)
896 else if ((fp
= fopen(fn
, ieo
->rmode
)) == 0) {
897 die(EXIT_FAILURE
, "couldn't open file `%s': %s",
898 fn
, strerror(errno
));
902 dfn
= argv
[optind
++];
904 ie
= initdec(ieo
, fp
, vrfbdry
, &v
);
906 /* --- Read the header chunk --- */
908 sig_readheader(ie
, &s
, diechoke
, "malformed header");
910 if (((s
.f
^ v
.f
) & v
.m
) != 0)
911 moan("boundary string inconsistent with contents (ignoring)");
913 mcsetup_read(&mc_in
, s
.f
, &ie
, fn
, dfn
);
915 /* --- Prepare the output stuff --- */
917 if (!of
&& !mf
) of
= "-";
919 f
= (f
& fm
) | (s
.f
& ~fm
);
926 mcsetup_writenull(&mc_out
);
928 if (strcmp(of
, "-") == 0)
930 else if ((ofp
= fopen(of
, oeo
->wmode
)) == 0) {
931 die(EXIT_FAILURE
, "couldn't open file `%s' for output: %s",
932 of
, strerror(errno
));
934 oe
= initenc(oeo
, ofp
,
935 (f
& F_DETACH
) ?
"CATSIGN SIGNATURE" :
936 (f
& F_BINARY
) ?
"CATSIGN MESSAGE" :
937 "CATSIGN MESSAGE HEADER");
938 sig_writeheader(oe
, &s
);
939 mcsetup_write(&mc_out
, f
, &oe
);
943 if (strcmp(mf
, "-") == 0)
945 else if ((mfp
= fopen(mf
, (f
& F_BINARY
) ?
"wb" : "w")) == 0) {
946 die(EXIT_FAILURE
, "couldn't open file `%s' for output: %s",
947 mf
, strerror(errno
));
951 /* --- Wade through the message body --- */
954 n
= mc_in
.read(&mc_in
, bb
);
956 mc_out
.write(&mc_out
, bb
, n
);
957 if (mfp
) fwrite(bb
, 1, n
, mfp
);
959 mc_endread(&mc_in
, ieo
, &ie
);
960 if (of
) mc_endwrite(&mc_out
, oeo
, &oe
);
962 /* --- Write the signature --- */
964 if (!(sf
& F_DETACH
))
967 sig_writesig(oe
, &s
);
968 oe
->ops
->encdone(oe
);
971 /* --- All done --- */
973 ie
->ops
->decdone(ie
);
974 if (ferror(fp
) || fclose(fp
))
975 die(EXIT_FAILURE
, "error reading input signature: %s", strerror(errno
));
976 if (ofp
&& (fflush(ofp
) || ferror(ofp
) || fclose(ofp
)))
977 die(EXIT_FAILURE
, "error writing output signature: %s", strerror(errno
));
978 if (mfp
&& (fflush(mfp
) || ferror(mfp
) || fclose(mfp
)))
979 die(EXIT_FAILURE
, "error writing output message: %s", strerror(errno
));
986 static void infochoke(const char *m
, void *p
)
989 printf("BAD %s: %s\n", v
->what
, m
);
993 static void infokeyreport(const char *file
, int line
,
994 const char *err
, void *p
)
997 static int info(int argc
, char *argv
[])
999 const char *ef
= "binary";
1000 vrfctx v
= { 0, 0, 1 };
1013 static const struct option opt
[] = {
1014 { "armour", 0, 0, 'a' },
1015 { "armor", 0, 0, 'a' },
1016 { "format", OPTF_ARGREQ
, 0, 'f' },
1017 { "gmt", 0, 0, 'u' },
1018 { "utc", 0, 0, 'u' },
1021 i
= mdwopt(argc
, argv
, "f:au", opt
, 0, 0, 0);
1024 case 'a': ef
= "pem"; break;
1025 case 'f': ef
= optarg
; break;
1026 case 'u': v
.f
|= F_UTC
; break;
1027 default: v
.f
|= F_BOGUS
; break;
1030 if (argc
- optind
> 1 || (v
.f
& F_BOGUS
))
1031 die(EXIT_FAILURE
, "Usage: info [-OPTIONS] [FILE]");
1033 if ((eo
= getenc(ef
)) == 0)
1034 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
1038 else if (strcmp(argv
[optind
], "-") == 0) {
1041 } else if ((fp
= fopen(argv
[optind
], eo
->rmode
)) == 0) {
1042 die(EXIT_FAILURE
, "couldn't open file `%s': %s",
1043 argv
[optind
], strerror(errno
));
1047 if (key_open(&kf
, keyring
, KOPEN_READ
, infokeyreport
, 0)) {
1048 printf("NOTE can't open keyring `%s'\n", keyring
);
1051 e
= initdec(eo
, fp
, vrfbdry
, &v
);
1053 v
.what
= "malformed header";
1054 sig_readheader(e
, &s
, infochoke
, &v
);
1056 printf("INFO flags %sdetach %sbinary\n",
1057 (s
.f
& F_DETACH
) ?
"" : "!",
1058 (s
.f
& F_BINARY
) ?
"" : "!");
1060 if (((s
.f
^ v
.f
) & v
.m
) != 0) {
1061 printf("WARN boundary string inconsistent with contents\n");
1062 printf("INFO expected-flags");
1063 if (v
.m
& F_DETACH
) printf(" %sdetach", (v
.f
& F_DETACH
) ?
"" : "!");
1064 if (v
.m
& F_BINARY
) printf(" %sbinary", (v
.f
& F_BINARY
) ?
"" : "!");
1069 tm
= (v
.f
& F_UTC
) ?
gmtime(&s
.t
) : localtime(&s
.t
);
1070 strftime(bb
, sizeof(bb
), "%Y-%m-%d %H:%M:%S %Z", tm
);
1071 printf("INFO date %s\n", bb
);
1073 if (keyring
&& (k
= key_byid(&kf
, s
.keyid
)) != 0) {
1074 dstr_reset(&d
); key_fulltag(k
, &d
);
1075 printf("INFO key %s\n", d
.buf
);
1077 printf("INFO unknown-key %08lx\n", (unsigned long)s
.keyid
);
1079 if (keyring
) key_close(&kf
);
1085 /*----- Main code ---------------------------------------------------------*/
1089 listtab[i].name, listtab[i].name) \
1090 LI("Signature schemes", sig, \
1091 sigtab[i].name, sigtab[i].name) \
1092 LI("Encodings", enc, \
1093 enctab[i].name, enctab[i].name) \
1094 LI("Hash functions", hash, \
1095 ghashtab[i], ghashtab[i]->name)
1097 MAKELISTTAB(listtab
, LISTS
)
1099 int cmd_show(int argc
, char *argv
[])
1101 return (displaylists(listtab
, argv
+ 1));
1104 static int cmd_help(int, char **);
1106 static cmd cmdtab
[] = {
1107 { "help", cmd_help
, "help [COMMAND...]" },
1108 { "show", cmd_show
, "show [ITEM...]" },
1112 "sign [-adptC] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\
1115 -a, --armour Same as `-f pem'.\n\
1116 -b, --binary Treat the input message as binary data.\n\
1117 -d, --detach Produce a detached signature.\n\
1118 -f, --format=FORMAT Encode as FORMAT.\n\
1119 -k, --key=TAG Use public encryption key named by TAG.\n\
1120 -o, --output=FILE Write output to FILE.\n\
1121 -p, --progress Show progress on large files.\n\
1122 -t, --text Canonify input message as a text file.\n\
1123 -C, --nocheck Don't check the private key.\n\
1126 "verify [-abpquvC] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\
1127 [FILE [MESSAGE]]", "\
1130 -a, --armour Same as `-f pem'.\n\
1131 -b, --buffer Buffer message until signature is verified.\n\
1132 -f, --format=FORMAT Decode as FORMAT.\n\
1133 -k, --key=TAG Require that the message be signed by key TAG.\n\
1134 -o, --output=FILE Write message to FILE.\n\
1135 -p, --progress Show progress on large files.\n\
1136 -q, --quiet Produce fewer messages.\n\
1137 -t, --freshtime=TIME Only accept signatures made after this time.\n\
1138 -u, --utc Show dates in UTC rather than local time.\n\
1139 -v, --verbose Produce more verbose messages.\n\
1140 -C, --nocheck Don't check the public key.\n\
1143 "info [-au] [-f FORMAT] [FILE]", "\
1146 -a, --armour Same as `-f pem'.\n\
1147 -f, --format=FORMAT Decode as FORMAT.\n\
1148 -u, --utc Show dates in UTC rather than local time.\n\
1151 "format [-apuADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\
1152 [FILE [MESSAGE]]", "\
1155 -a, --armour-in Same as `-f pem'.\n\
1156 -A, --armour-out Same as `-F pem'.\n\
1157 -D, --detach Create detached signature.\n\
1158 -E, --embed Create signature with embedded message.\n\
1159 -f, --format-in=FORMAT Decode input as FORMAT.\n\
1160 -F, --format-out=FORMAT Encode output as FORMAT.\n\
1161 -m, --message=FILE Write message to FILE.\n\
1162 -o, --output=FILE Write new signature to FILE.\n\
1163 -p, --progress Show progress on large files.\n\
1166 }; /* " Emacs seems confused. */
1168 static int cmd_help(int argc
, char **argv
)
1170 sc_help(cmdtab
, stdout
, argv
+ 1);
1174 void version(FILE *fp
)
1176 pquis(fp
, "$, Catacomb version " VERSION
"\n");
1179 static void usage(FILE *fp
)
1181 pquis(fp
, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n");
1184 void help_global(FILE *fp
)
1188 Sign and verify data.\n\
1190 Global command-line options:\n\
1192 -h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\
1193 -v, --version Show program version number.\n\
1194 -u, --usage Show a terse usage message.\n\
1196 -k, --keyring=FILE Read keys from FILE.\n",
1202 * Arguments: @int argc@ = number of command line arguments
1203 * @char *argv[]@ = vector of command line arguments
1205 * Returns: Zero if successful, nonzero otherwise.
1207 * Use: Encrypts or decrypts files.
1210 int main(int argc
, char *argv
[])
1216 /* --- Initialize the library --- */
1220 rand_noisesrc(RAND_GLOBAL
, &noise_source
);
1221 rand_seed(RAND_GLOBAL
, 160);
1223 /* --- Parse options --- */
1226 static struct option opts
[] = {
1227 { "help", 0, 0, 'h' },
1228 { "version", 0, 0, 'v' },
1229 { "usage", 0, 0, 'u' },
1230 { "keyring", OPTF_ARGREQ
, 0, 'k' },
1233 int i
= mdwopt(argc
, argv
, "+hvu k:", opts
, 0, 0, 0);
1238 sc_help(cmdtab
, stdout
, argv
+ optind
);
1260 if (f
& f_bogus
|| argc
< 1) {
1265 /* --- Dispatch to the correct subcommand handler --- */
1267 return (findcmd(cmdtab
, argv
[0])->cmd(argc
, argv
));
1272 /*----- That's all, folks -------------------------------------------------*/