7 * (c) 2005 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Header files ------------------------------------------------------*/
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
96 /*----- Chunk I/O ---------------------------------------------------------*/
98 static void chunk_write(enc
*e
, const void *p
, size_t 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
));
108 static size_t chunk_read(enc
*e
, void *p
)
113 if (e
->ops
->read(e
, b
, 2) != 2)
116 if (n
&& e
->ops
->read(e
, p
, n
) != n
)
121 if (!errno
) die(EXIT_FAILURE
, "unexpected end-of-file on input");
122 else die(EXIT_FAILURE
, "error reading input: %s", strerror(errno
));
126 /*----- Message canonification --------------------------------------------*/
128 #define MSGBUFSZ 65536
129 #define MSGBUFTHRESH 32768
131 typedef struct msgcanon
{
135 size_t (*read
)(struct msgcanon
*, void *);
136 void (*write
)(struct msgcanon
*, const void *, size_t);
137 void (*close
)(struct msgcanon
*);
140 #define MC_INIT { 0 }
142 static size_t textread(msgcanon
*m
, void *bp
)
144 size_t n
= 0, nsp
= 0;
149 if (f
& F_EOF
) return (0);
151 if ((ch
= getc(m
->fp
)) == EOF
) goto eof
;
152 if (!(f
& (F_DETACH
| F_MIDLINE
)) && ch
== '.') {
154 if (ch
== '\n') goto eof
;
158 if (n
>= MSGBUFTHRESH
) goto full
;
161 } else if (isspace(ch
)) {
163 if (n
>= MSGBUFSZ
) goto full
;
168 if (n
>= MSGBUFTHRESH
) goto full
;
182 static void textwrite(msgcanon
*m
, const void *bp
, size_t n
)
184 const char *p
= bp
, *l
= p
+ n
;
188 if (!(f
& (F_MIDLINE
| F_DETACH
)) &&
189 (*p
== '.' || *p
== '-'))
191 if (*p
== '\n') f
&= ~F_MIDLINE
;
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
)); }
204 static void binwriteembed(msgcanon
*m
, const void *bp
, size_t n
)
205 { chunk_write(m
->e
, bp
, n
); }
207 static void nullwrite(msgcanon
*m
, const void *bp
, size_t n
) { ; }
209 static void mcsetup_readfile(msgcanon
*m
, unsigned f
, const char *fn
)
211 m
->f
= F_DETACH
| (f
& F_BINARY
);
212 if (!fn
|| strcmp(fn
, "-") == 0) {
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
;
220 static void mcsetup_writenull(msgcanon
*m
) { m
->write
= nullwrite
; }
222 static void mcsetup_read(msgcanon
*m
, unsigned f
, enc
**ee
, const char *dfn
)
226 m
->f
= f
| F_NOCLOSE
;
228 if (dfn
&& !(f
& F_DETACH
)) die(EXIT_FAILURE
, "signature is not detached");
230 if (!(f
& F_DETACH
)) {
234 m
->read
= binreadembed
;
236 m
->read
= binreaddetach
;
237 if (!dfn
|| strcmp(dfn
, "-") == 0)
239 else if ((m
->fp
= fopen(dfn
, "rb")) == 0)
240 die(EXIT_FAILURE
, "can't open `%s': %s", dfn
, strerror(errno
));
246 if (!(f
& F_DETACH
)) {
247 if (e
->ops
->decdone(e
) || ferror(e
->fp
))
248 die(EXIT_FAILURE
, "error at end of signature header");
252 } else if (!dfn
|| strcmp(dfn
, "-") == 0)
254 else if ((m
->fp
= fopen(dfn
, "r")) == 0)
255 die(EXIT_FAILURE
, "can't read file `%s': %s", dfn
, strerror(errno
));
261 static void mcsetup_write(msgcanon
*m
, unsigned f
, enc
**ee
)
265 m
->f
= f
| F_NOCLOSE
;
268 m
->write
= nullwrite
;
269 else if (f
& F_BINARY
) {
273 m
->write
= binwriteembed
;
275 if (e
->ops
->encdone(e
) || ferror(e
->fp
))
276 die(EXIT_FAILURE
, "error at end of signature header");
280 m
->write
= textwrite
;
284 static void mc_endread(msgcanon
*m
, const encops
*eops
, enc
**ee
)
286 if (!(m
->f
& F_DETACH
)) {
290 *ee
= initdec(eops
, m
->fp
, checkbdry
, "CATSIGN SIGNATURE");
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
));
298 static void mc_endwrite(msgcanon
*m
, const encops
*eops
, enc
**ee
)
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");
306 } else if (!(m
->f
& F_DETACH
)) {
307 chunk_write(m
->e
, 0, 0);
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
));
316 /*----- Signature reading and writing -------------------------------------*/
318 static void sig_init(sigmsg
*s
, unsigned f
, uint32 keyid
)
320 s
->f
= f
& F_SIGMASK
;
325 dstr_create(&s
->sig
);
328 static void sig_destroy(sigmsg
*s
)
330 dstr_destroy(&s
->kh
);
331 dstr_destroy(&s
->sig
);
332 if (s
->s
) freesig(s
->s
);
335 static void sigtobuffer(sigmsg
*s
, buf
*b
, int hashp
)
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
);
349 static void dohash(ghash
*h
, const void *p
, size_t n
)
351 /* trace_block(1, "hashing", p, n); */
355 static void sig_hash(sigmsg
*s
)
360 buf_init(&b
, bb
, sizeof(bb
));
361 sigtobuffer(s
, &b
, 1);
362 dohash(s
->s
->h
, BBASE(&b
), BLEN(&b
));
365 static void keyhash(key
*k
, sig
*s
, dstr
*d
)
370 h
= GH_INIT(GH_CLASS(s
->h
));
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
;
380 static void sig_writeheader(enc
*e
, sigmsg
*s
)
385 buf_init(&b
, bb
, sizeof(bb
));
386 sigtobuffer(s
, &b
, 0);
387 chunk_write(e
, BBASE(&b
), BLEN(&b
));
390 static void sig_writesig(enc
*e
, sigmsg
*s
)
391 { chunk_write(e
, s
->sig
.buf
, s
->sig
.len
); }
393 static void diechoke(const char *m
, void *p
)
394 { die(EXIT_FAILURE
, "%s%s%s", p
, p ?
": " : "", m
); }
396 static void sig_readheader(enc
*e
, sigmsg
*s
,
397 void (*choke
)(const char *, void *), void *p
)
406 n
= chunk_read(e
, bb
);
408 if (buf_getu16(&b
, &f
)) choke("missing flags", p
);
409 if (buf_getu32(&b
, &x
)) choke("missing keyid", p
);
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
);
417 choke("junk at end", p
);
420 static void sig_readsig(enc
*e
, sigmsg
*s
)
425 n
= chunk_read(e
, bb
);
426 dstr_putm(&s
->sig
, bb
, n
);
429 /*----- Signing -----------------------------------------------------------*/
431 static int sign(int argc
, char *argv
[])
433 const char *ef
= "binary", *fn
= 0, *of
= 0, *kn
= "ccsig", *err
;
444 msgcanon mc_in
= MC_INIT
, mc_out
= MC_INIT
;
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' },
460 i
= mdwopt(argc
, argv
, "k:f:o:abdtC", opt
, 0, 0, 0);
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;
474 if (argc
- optind
> 1 || (f
& F_BOGUS
))
475 die(EXIT_FAILURE
, "Usage: sign [-OPTIONS] [FILE]");
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
);
482 if ((eo
= getenc(ef
)) == 0)
483 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
485 fn
= (optind
>= argc
) ?
0 : argv
[optind
++];
487 if (!of
|| strcmp(of
, "-") == 0)
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
));
494 /* --- Start the work --- */
496 sig_init(&s
, f
, k
->id
);
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
);
504 (f
& F_DETACH
) ?
"CATSIGN SIGNATURE" :
505 (f
& F_BINARY
) ?
"CATSIGN MESSAGE" :
506 "CATSIGN MESSAGE HEADER");
507 sig_writeheader(e
, &s
);
509 /* --- Hash the message --- */
511 mcsetup_readfile(&mc_in
, f
, fn
);
512 mcsetup_write(&mc_out
, f
, &e
);
515 n
= mc_in
.read(&mc_in
, bb
);
517 dohash(s
.s
->h
, bb
, n
);
518 mc_out
.write(&mc_out
, bb
, n
);
520 mc_endread(&mc_in
, 0, 0);
521 mc_endwrite(&mc_out
, eo
, &e
);
523 /* --- Write the signature --- */
525 if (s
.s
->ops
->doit(s
.s
, &s
.sig
))
526 die(EXIT_FAILURE
, "signature failed");
529 if (fflush(ofp
) || ferror(ofp
) || fclose(ofp
))
530 die(EXIT_FAILURE
, "error writing signature: %s", strerror(errno
));
532 /* --- All done --- */
541 /*----- Verifying ---------------------------------------------------------*/
543 typedef struct vrfctx
{
549 static int vrfbdry(const char *b
, void *p
)
553 if (strcmp(b
, "CATSIGN MESSAGE") == 0) {
555 v
->m
|= F_BINARY
| F_DETACH
;
557 } else if (strcmp(b
, "CATSIGN MESSAGE HEADER") == 0) {
558 v
->m
|= F_BINARY
| F_DETACH
;
560 } else if (strcmp(b
, "CATSIGN SIGNATURE") == 0) {
568 static void vrfchoke(const char *m
, void *p
)
571 if (v
->verb
) printf("FAIL %s: %s\n", v
->what
, m
);
575 static int verify(int argc
, char *argv
[])
577 const char *ef
= "binary", *of
= 0, *dfn
= 0, *kn
= 0, *err
;
578 vrfctx v
= { 0, 0, 1 };
582 FILE *fp
, *ofp
= 0, *rfp
= 0;
588 dstr d
= DSTR_INIT
, dd
= DSTR_INIT
;
590 msgcanon mc_in
= MC_INIT
;
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' },
609 i
= mdwopt(argc
, argv
, "k:f:o:abqt:uvC", opt
, 0, 0, 0);
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;
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");
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;
629 if (argc
- optind
> 2 || (v
.f
& F_BOGUS
))
630 die(EXIT_FAILURE
, "Usage: verify [-OPTIONS] [FILE [MESSAGE]]");
632 if ((eo
= getenc(ef
)) == 0)
633 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
637 else if (strcmp(argv
[optind
], "-") == 0) {
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
));
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
);
651 e
= initdec(eo
, fp
, vrfbdry
, &v
);
653 /* --- Read the header chunk --- */
655 v
.what
= "malformed header";
656 sig_readheader(e
, &s
, vrfchoke
, &v
);
658 if (((s
.f
^ v
.f
) & v
.m
) != 0) {
659 if (v
.verb
) printf("FAIL boundary string inconsistent with contents\n");
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
);
669 if (kk
&& k
->id
!= kk
->id
) {
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
);
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
);
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");
689 /* --- Now a merry dance --- */
694 dfn
= argv
[optind
++];
695 mcsetup_read(&mc_in
, v
.f
, &e
, dfn
);
697 if (!of
&& (v
.f
& F_DETACH
)) {
700 } else if (!of
|| strcmp(of
, "-") == 0) {
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
));
710 } else if ((rfp
= tmpfile()) == 0)
711 die(EXIT_FAILURE
, "couldn't create temporary file: %s", strerror(errno
));
713 /* --- Read the message and verify the signature --- */
717 n
= mc_in
.read(&mc_in
, bb
);
719 dohash(s
.s
->h
, bb
, n
);
720 if (rfp
) fwrite(bb
, 1, n
, rfp
);
722 mc_endread(&mc_in
, eo
, &e
);
723 if (!(v
.f
& F_DETACH
))
725 if (rfp
&& (ferror(rfp
) || fflush(rfp
))) {
726 if (v
.verb
) printf("FAIL error writing message: %s\n", strerror(errno
));
730 /* --- Check the signature --- */
732 if (s
.s
->ops
->doit(s
.s
, &s
.sig
)) {
733 if (v
.verb
) printf("FAIL signature verification failed\n");
736 if (t_fresh
&& s
.t
< t_fresh
) {
737 if (v
.verb
) printf("FAIL signature is stale\n");
741 if (v
.verb
) printf("FAIL signature timestamp in the future\n");
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
);
751 /* --- Unbuffer buffered input --- */
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
));
759 if (v
.verb
&& ofp
== stdout
) printf("DATA\n");
761 n
= fread(bb
, 1, sizeof(bb
), rfp
);
763 if (fwrite(bb
, 1, n
, ofp
) < n
)
764 die(EXIT_FAILURE
, "error writing output: %s", strerror(errno
));
766 if (ferror(rfp
) || fclose(rfp
))
767 die(EXIT_FAILURE
, "error unbuffering output: %s", strerror(errno
));
769 if (ofp
&& (fflush(ofp
) || ferror(ofp
) || fclose(ofp
)))
770 die(EXIT_FAILURE
, "error writing output: %s", strerror(errno
));
772 /* --- Tidy up --- */
775 if (v
.verb
&& ofp
!= stdout
)
776 printf("OK verified successfully\n");
785 /*----- Reformatting ------------------------------------------------------*/
787 static int format(int argc
, char *argv
[])
789 const char *ief
= "binary", *oef
= "binary";
790 const char *dfn
= 0, *of
= 0, *mf
= 0;
792 FILE *fp
, *ofp
= 0, *mfp
= 0;
795 msgcanon mc_in
= MC_INIT
, mc_out
= MC_INIT
;
797 vrfctx v
= { 0, 0, 1 };
798 unsigned f
= 0, fm
= ~F_SIGMASK
, sf
;
799 const encops
*ieo
, *oeo
;
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' },
816 i
= mdwopt(argc
, argv
, "f:F:m:o:aADE", opt
, 0, 0, 0);
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;
831 if (argc
- optind
> 2 || (f
& F_BOGUS
))
832 die(EXIT_FAILURE
, "Usage: format [-OPTIONS] [FILE [MESSAGE]]");
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
);
841 else if (strcmp(argv
[optind
], "-") == 0) {
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
));
851 dfn
= argv
[optind
++];
853 ie
= initdec(ieo
, fp
, vrfbdry
, &v
);
855 /* --- Read the header chunk --- */
857 sig_readheader(ie
, &s
, diechoke
, "malformed header");
859 if (((s
.f
^ v
.f
) & v
.m
) != 0)
860 moan("boundary string inconsistent with contents (ignoring)");
862 mcsetup_read(&mc_in
, s
.f
, &ie
, dfn
);
864 /* --- Prepare the output stuff --- */
866 if (!of
&& !mf
) of
= "-";
868 f
= (f
& fm
) | (s
.f
& ~fm
);
875 mcsetup_writenull(&mc_out
);
877 if (strcmp(of
, "-") == 0)
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
));
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
);
892 if (strcmp(mf
, "-") == 0)
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
));
900 /* --- Wade through the message body --- */
903 n
= mc_in
.read(&mc_in
, bb
);
905 mc_out
.write(&mc_out
, bb
, n
);
906 if (mfp
) fwrite(bb
, 1, n
, mfp
);
908 mc_endread(&mc_in
, ieo
, &ie
);
909 if (of
) mc_endwrite(&mc_out
, oeo
, &oe
);
911 /* --- Write the signature --- */
913 if (!(sf
& F_DETACH
))
916 sig_writesig(oe
, &s
);
917 oe
->ops
->encdone(oe
);
920 /* --- All done --- */
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
));
935 static void infochoke(const char *m
, void *p
)
938 printf("BAD %s: %s\n", v
->what
, m
);
942 static void infokeyreport(const char *file
, int line
,
943 const char *err
, void *p
)
946 static int info(int argc
, char *argv
[])
948 const char *ef
= "binary";
949 vrfctx v
= { 0, 0, 1 };
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' },
970 i
= mdwopt(argc
, argv
, "f:au", opt
, 0, 0, 0);
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;
979 if (argc
- optind
> 1 || (v
.f
& F_BOGUS
))
980 die(EXIT_FAILURE
, "Usage: info [-OPTIONS] [FILE]");
982 if ((eo
= getenc(ef
)) == 0)
983 die(EXIT_FAILURE
, "encoding `%s' not found", ef
);
987 else if (strcmp(argv
[optind
], "-") == 0) {
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
));
996 if (key_open(&kf
, keyring
, KOPEN_READ
, infokeyreport
, 0)) {
997 printf("NOTE can't open keyring `%s'\n", keyring
);
1000 e
= initdec(eo
, fp
, vrfbdry
, &v
);
1002 v
.what
= "malformed header";
1003 sig_readheader(e
, &s
, infochoke
, &v
);
1005 printf("INFO flags %sdetach %sbinary\n",
1006 (s
.f
& F_DETACH
) ?
"" : "!",
1007 (s
.f
& F_BINARY
) ?
"" : "!");
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
) ?
"" : "!");
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
);
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
);
1026 printf("INFO unknown-key %08lx\n", (unsigned long)s
.keyid
);
1028 if (keyring
) key_close(&kf
);
1034 /*----- Main code ---------------------------------------------------------*/
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)
1046 MAKELISTTAB(listtab
, LISTS
)
1048 int cmd_show(int argc
, char *argv
[])
1050 return (displaylists(listtab
, argv
+ 1));
1053 static int cmd_help(int, char **);
1055 static cmd cmdtab
[] = {
1056 { "help", cmd_help
, "help [COMMAND...]" },
1057 { "show", cmd_show
, "show [ITEM...]" },
1061 "sign [-adtC] [-k TAG] [-f FORMAT] [-o OUTPUT] [FILE]", "\
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\
1074 "verify [-abquvC] [-f FORMAT] [-k TAG] [-o OUTPUT]\n\t\
1075 [FILE [MESSAGE]]", "\
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\
1090 "info [-au] [-f FORMAT] [FILE]", "\
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\
1098 "format [-auADE] [-f FORMAT] [-F format] [-m FILE] [-o FILE]\n\t\
1099 [FILE [MESSAGE]]", "\
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\
1112 }; /* " Emacs seems confused. */
1114 static int cmd_help(int argc
, char **argv
)
1116 sc_help(cmdtab
, stdout
, argv
+ 1);
1120 void version(FILE *fp
)
1122 pquis(fp
, "$, Catacomb version " VERSION
"\n");
1125 static void usage(FILE *fp
)
1127 pquis(fp
, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n");
1130 void help_global(FILE *fp
)
1134 Sign and verify data.\n\
1136 Global command-line options:\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\
1142 -k, --keyring=FILE Read keys from FILE.\n",
1148 * Arguments: @int argc@ = number of command line arguments
1149 * @char *argv[]@ = vector of command line arguments
1151 * Returns: Zero if successful, nonzero otherwise.
1153 * Use: Encrypts or decrypts files.
1156 int main(int argc
, char *argv
[])
1162 /* --- Initialize the library --- */
1166 rand_noisesrc(RAND_GLOBAL
, &noise_source
);
1167 rand_seed(RAND_GLOBAL
, 160);
1168 /* trace_on(stderr, 1); */
1170 /* --- Parse options --- */
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' },
1180 int i
= mdwopt(argc
, argv
, "+hvu k:", opts
, 0, 0, 0);
1185 sc_help(cmdtab
, stdout
, argv
+ optind
);
1207 if (f
& f_bogus
|| argc
< 1) {
1212 /* --- Dispatch to the correct subcommand handler --- */
1214 return (findcmd(cmdtab
, argv
[0])->cmd(argc
, argv
));
1219 /*----- That's all, folks -------------------------------------------------*/