5 * (c) 2004 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
34 #include <mLib/report.h>
54 /*----- Main code ---------------------------------------------------------*/
56 /* --- RSA PKCS1 --- */
58 typedef struct rsap1_sigctx
{
64 static sig
*rsap1_siginit(key
*k
, void *kd
, const gchash
*hc
)
66 rsap1_sigctx
*rs
= CREATE(rsap1_sigctx
);
67 rsa_privcreate(&rs
->rp
, kd
, &rand_global
);
68 rs
->p1
.r
= &rand_global
;
70 rs
->p1
.epsz
= strlen(hc
->name
) + 1;
75 static int rsap1_sigdoit(sig
*s
, dstr
*d
)
77 rsap1_sigctx
*rs
= (rsap1_sigctx
*)s
;
79 mp
*m
= rsa_sign(&rs
->rp
, MP_NEW
,
80 GH_DONE(s
->h
, 0), GH_CLASS(s
->h
)->hashsz
,
81 pkcs1_sigencode
, &rs
->p1
);
83 n
= mp_octets(rs
->rp
.rp
->n
); dstr_ensure(d
, n
); mp_storeb(m
, d
->buf
, n
);
84 d
->len
+= n
; mp_drop(m
);
88 static const char *rsa_lengthcheck(mp
*n
)
90 if (mp_bits(n
) < 1024) return ("key too short");
94 static const char *rsap1_sigcheck(sig
*s
)
96 rsap1_sigctx
*rs
= (rsap1_sigctx
*)s
;
98 if ((e
= rsa_lengthcheck(rs
->rp
.rp
->n
)) != 0) return (e
);
102 static void rsap1_sigdestroy(sig
*s
)
104 rsap1_sigctx
*rs
= (rsap1_sigctx
*)s
;
105 rsa_privdestroy(&rs
->rp
);
109 static const sigops rsap1_sig
= {
110 rsa_privfetch
, sizeof(rsa_priv
),
111 rsap1_siginit
, rsap1_sigdoit
, rsap1_sigcheck
, rsap1_sigdestroy
114 typedef struct rsap1_vrfctx
{
120 static sig
*rsap1_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
122 rsap1_vrfctx
*rv
= CREATE(rsap1_vrfctx
);
123 rsa_pubcreate(&rv
->rp
, kd
);
124 rv
->p1
.r
= &rand_global
;
125 rv
->p1
.ep
= hc
->name
;
126 rv
->p1
.epsz
= strlen(hc
->name
) + 1;
131 static int rsap1_vrfdoit(sig
*s
, dstr
*d
)
133 rsap1_vrfctx
*rv
= (rsap1_vrfctx
*)s
;
134 mp
*m
= mp_loadb(MP_NEW
, d
->buf
, d
->len
);
135 int rc
= rsa_verify(&rv
->rp
, m
,
136 GH_DONE(s
->h
, 0), GH_CLASS(s
->h
)->hashsz
,
137 0, pkcs1_sigdecode
, &rv
->p1
);
142 static const char *rsap1_vrfcheck(sig
*s
)
144 rsap1_vrfctx
*rv
= (rsap1_vrfctx
*)s
;
146 if ((e
= rsa_lengthcheck(rv
->rp
.rp
->n
)) != 0) return (e
);
150 static void rsap1_vrfdestroy(sig
*s
)
152 rsap1_vrfctx
*rv
= (rsap1_vrfctx
*)s
;
153 rsa_pubdestroy(&rv
->rp
);
157 static const sigops rsap1_vrf
= {
158 rsa_pubfetch
, sizeof(rsa_pub
),
159 rsap1_vrfinit
, rsap1_vrfdoit
, rsap1_vrfcheck
, rsap1_vrfdestroy
162 /* --- RSA PSS --- */
164 static const gccipher
*getmgf(key
*k
, const gchash
*hc
)
170 if ((mm
= key_getattr(0, k
, "mgf")) == 0) {
171 dstr_putf(&d
, "%s-mgf", hc
->name
);
174 if ((gc
= gcipher_byname(mm
)) == 0)
175 die(EXIT_FAILURE
, "unknown encryption scheme `%s'", mm
);
180 typedef struct rsapss_sigctx
{
186 static sig
*rsapss_siginit(key
*k
, void *kd
, const gchash
*hc
)
188 rsapss_sigctx
*rs
= CREATE(rsapss_sigctx
);
189 rsa_privcreate(&rs
->rp
, kd
, &rand_global
);
191 rs
->p
.r
= &rand_global
;
192 rs
->p
.cc
= getmgf(k
, hc
);
194 rs
->p
.ssz
= hc
->hashsz
;
198 static int rsapss_sigdoit(sig
*s
, dstr
*d
)
200 rsapss_sigctx
*rs
= (rsapss_sigctx
*)s
;
202 mp
*m
= rsa_sign(&rs
->rp
, MP_NEW
,
203 GH_DONE(s
->h
, 0), GH_CLASS(s
->h
)->hashsz
,
206 n
= mp_octets(rs
->rp
.rp
->n
); dstr_ensure(d
, n
); mp_storeb(m
, d
->buf
, n
);
207 d
->len
+= n
; mp_drop(m
);
211 static const char *rsapss_sigcheck(sig
*s
)
213 rsapss_sigctx
*rs
= (rsapss_sigctx
*)s
;
215 if ((e
= rsa_lengthcheck(rs
->rp
.rp
->n
)) != 0) return (e
);
219 static void rsapss_sigdestroy(sig
*s
)
221 rsapss_sigctx
*rs
= (rsapss_sigctx
*)s
;
222 rsa_privdestroy(&rs
->rp
);
226 static const sigops rsapss_sig
= {
227 rsa_privfetch
, sizeof(rsa_priv
),
228 rsapss_siginit
, rsapss_sigdoit
, rsapss_sigcheck
, rsapss_sigdestroy
231 typedef struct rsapss_vrfctx
{
237 static sig
*rsapss_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
239 rsapss_vrfctx
*rv
= CREATE(rsapss_vrfctx
);
240 rsa_pubcreate(&rv
->rp
, kd
);
242 rv
->p
.r
= &rand_global
;
243 rv
->p
.cc
= getmgf(k
, hc
);
245 rv
->p
.ssz
= hc
->hashsz
;
249 static int rsapss_vrfdoit(sig
*s
, dstr
*d
)
251 rsapss_vrfctx
*rv
= (rsapss_vrfctx
*)s
;
252 mp
*m
= mp_loadb(MP_NEW
, d
->buf
, d
->len
);
253 int rc
= rsa_verify(&rv
->rp
, m
,
254 GH_DONE(s
->h
, 0), GH_CLASS(s
->h
)->hashsz
,
255 0, pss_decode
, &rv
->p
);
260 static const char *rsapss_vrfcheck(sig
*s
)
262 rsapss_vrfctx
*rv
= (rsapss_vrfctx
*)s
;
264 if ((e
= rsa_lengthcheck(rv
->rp
.rp
->n
)) != 0) return (e
);
268 static void rsapss_vrfdestroy(sig
*s
)
270 rsapss_vrfctx
*rv
= (rsapss_vrfctx
*)s
;
271 rsa_pubdestroy(&rv
->rp
);
275 static const sigops rsapss_vrf
= {
276 rsa_pubfetch
, sizeof(rsa_pub
),
277 rsapss_vrfinit
, rsapss_vrfdoit
, rsapss_vrfcheck
, rsapss_vrfdestroy
280 /* --- DSA and ECDSA --- */
282 typedef struct dsa_sigctx
{
287 static void dsa_initcommon(dsa_sigctx
*ds
, const gchash
*hc
,
290 ds
->g
.r
= &rand_global
;
296 static dsa_sigctx
*dsa_doinit(key
*k
, const gprime_param
*gp
,
297 mp
*y
, const gchash
*hc
,
298 group
*(*makegroup
)(const gprime_param
*),
301 dsa_sigctx
*ds
= CREATE(dsa_sigctx
);
305 if ((ds
->g
.g
= makegroup(gp
)) == 0)
306 die(EXIT_FAILURE
, "bad %s group in key `%s'", what
, t
.buf
);
307 ds
->g
.p
= G_CREATE(ds
->g
.g
);
308 if (G_FROMINT(ds
->g
.g
, ds
->g
.p
, y
))
309 die(EXIT_FAILURE
, "bad public key in key `%s'", t
.buf
);
310 dsa_initcommon(ds
, hc
, t
.buf
);
315 static dsa_sigctx
*ecdsa_doinit(key
*k
, const char *cstr
,
316 ec
*y
, const gchash
*hc
)
318 dsa_sigctx
*ds
= CREATE(dsa_sigctx
);
324 if ((e
= ec_getinfo(&ei
, cstr
)) != 0)
325 die(EXIT_FAILURE
, "bad curve in key `%s': %s", t
.buf
, e
);
326 ds
->g
.g
= group_ec(&ei
);
327 ds
->g
.p
= G_CREATE(ds
->g
.g
);
328 if (G_FROMEC(ds
->g
.g
, ds
->g
.p
, y
))
329 die(EXIT_FAILURE
, "bad public key in key `%s'", t
.buf
);
330 dsa_initcommon(ds
, hc
, t
.buf
);
335 static sig
*dsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
338 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_prime
, "prime");
339 ds
->g
.u
= MP_COPY(dp
->x
);
343 static sig
*bindsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
346 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_binary
, "binary");
347 ds
->g
.u
= MP_COPY(dp
->x
);
351 static sig
*ecdsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
354 dsa_sigctx
*ds
= ecdsa_doinit(k
, ep
->cstr
, &ep
->p
, hc
);
355 ds
->g
.u
= MP_COPY(ep
->x
);
359 static int dsa_sigdoit(sig
*s
, dstr
*d
)
361 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
362 gdsa_sig ss
= GDSA_SIG_INIT
;
363 size_t n
= mp_octets(ds
->g
.g
->r
);
365 gdsa_sign(&ds
->g
, &ss
, GH_DONE(ds
->s
.h
, 0), 0);
366 dstr_ensure(d
, 2 * n
);
367 mp_storeb(ss
.r
, d
->buf
, n
);
368 mp_storeb(ss
.s
, d
->buf
+ n
, n
);
370 mp_drop(ss
.r
); mp_drop(ss
.s
);
374 static const char *dsa_sigcheck(sig
*s
)
376 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
378 if ((e
= G_CHECK(ds
->g
.g
, &rand_global
)) != 0)
380 if (group_check(ds
->g
.g
, ds
->g
.p
))
381 return ("public key not in subgroup");
385 static void dsa_sigdestroy(sig
*s
)
387 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
388 G_DESTROY(ds
->g
.g
, ds
->g
.p
);
390 G_DESTROYGROUP(ds
->g
.g
);
394 static const sigops dsa_sig
= {
395 dh_privfetch
, sizeof(dh_priv
),
396 dsa_siginit
, dsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
399 static const sigops bindsa_sig
= {
400 dh_privfetch
, sizeof(dh_priv
),
401 bindsa_siginit
, dsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
404 static const sigops ecdsa_sig
= {
405 ec_privfetch
, sizeof(ec_priv
),
406 ecdsa_siginit
, dsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
409 static sig
*dsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
412 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_prime
, "prime");
416 static sig
*bindsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
419 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_binary
, "binary");
423 static sig
*ecdsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
426 dsa_sigctx
*ds
= ecdsa_doinit(k
, ep
->cstr
, &ep
->p
, hc
);
430 static int dsa_vrfdoit(sig
*s
, dstr
*d
)
432 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
437 ss
.r
= mp_loadb(MP_NEW
, d
->buf
, n
);
438 ss
.s
= mp_loadb(MP_NEW
, d
->buf
+ n
, d
->len
- n
);
439 rc
= gdsa_verify(&ds
->g
, &ss
, GH_DONE(ds
->s
.h
, 0));
440 mp_drop(ss
.r
); mp_drop(ss
.s
);
444 static const sigops dsa_vrf
= {
445 dh_pubfetch
, sizeof(dh_pub
),
446 dsa_vrfinit
, dsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
449 static const sigops bindsa_vrf
= {
450 dh_pubfetch
, sizeof(dh_pub
),
451 bindsa_vrfinit
, dsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
454 static const sigops ecdsa_vrf
= {
455 ec_pubfetch
, sizeof(ec_pub
),
456 ecdsa_vrfinit
, dsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
459 /* --- KCDSA and ECKCDSA --- */
461 static void kcdsa_privkey(dsa_sigctx
*ds
, mp
*x
)
462 { ds
->g
.u
= mp_modinv(MP_NEW
, x
, ds
->g
.g
->r
); }
464 static void kcdsa_sethash(dsa_sigctx
*ds
, const gchash
*hc
)
465 { ds
->s
.h
= gkcdsa_beginhash(&ds
->g
); }
467 static sig
*kcdsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
470 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_prime
, "prime");
471 kcdsa_privkey(ds
, dp
->x
);
472 kcdsa_sethash(ds
, hc
);
476 static sig
*binkcdsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
479 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_binary
, "binary");
480 kcdsa_privkey(ds
, dp
->x
);
481 kcdsa_sethash(ds
, hc
);
485 static sig
*eckcdsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
488 dsa_sigctx
*ds
= ecdsa_doinit(k
, ep
->cstr
, &ep
->p
, hc
);
489 kcdsa_privkey(ds
, ep
->x
);
490 kcdsa_sethash(ds
, hc
);
494 static int kcdsa_sigdoit(sig
*s
, dstr
*d
)
496 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
497 gkcdsa_sig ss
= GKCDSA_SIG_INIT
;
498 size_t hsz
= ds
->g
.h
->hashsz
, n
= mp_octets(ds
->g
.g
->r
);
500 gkcdsa_sign(&ds
->g
, &ss
, GH_DONE(ds
->s
.h
, 0), 0);
501 dstr_ensure(d
, hsz
+ n
);
502 memcpy(d
->buf
, ss
.r
, hsz
);
503 mp_storeb(ss
.s
, d
->buf
+ hsz
, n
);
505 xfree(ss
.r
); mp_drop(ss
.s
);
509 static const sigops kcdsa_sig
= {
510 dh_privfetch
, sizeof(dh_priv
),
511 kcdsa_siginit
, kcdsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
514 static const sigops binkcdsa_sig
= {
515 dh_privfetch
, sizeof(dh_priv
),
516 binkcdsa_siginit
, kcdsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
519 static const sigops eckcdsa_sig
= {
520 ec_privfetch
, sizeof(ec_priv
),
521 eckcdsa_siginit
, kcdsa_sigdoit
, dsa_sigcheck
, dsa_sigdestroy
524 static sig
*kcdsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
527 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_prime
, "prime");
528 kcdsa_sethash(ds
, hc
);
532 static sig
*binkcdsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
535 dsa_sigctx
*ds
= dsa_doinit(k
, &dp
->dp
, dp
->y
, hc
, group_binary
, "binary");
536 kcdsa_sethash(ds
, hc
);
540 static sig
*eckcdsa_vrfinit(key
*k
, void *kd
, const gchash
*hc
)
543 dsa_sigctx
*ds
= ecdsa_doinit(k
, ep
->cstr
, &ep
->p
, hc
);
544 kcdsa_sethash(ds
, hc
);
548 static int kcdsa_vrfdoit(sig
*s
, dstr
*d
)
550 dsa_sigctx
*ds
= (dsa_sigctx
*)s
;
552 size_t hsz
= ds
->g
.h
->hashsz
, n
= d
->len
- hsz
;
557 ss
.r
= (octet
*)d
->buf
;
558 ss
.s
= mp_loadb(MP_NEW
, d
->buf
+ hsz
, n
);
559 rc
= gkcdsa_verify(&ds
->g
, &ss
, GH_DONE(ds
->s
.h
, 0));
564 static const sigops kcdsa_vrf
= {
565 dh_pubfetch
, sizeof(dh_pub
),
566 kcdsa_vrfinit
, kcdsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
569 static const sigops binkcdsa_vrf
= {
570 dh_pubfetch
, sizeof(dh_pub
),
571 binkcdsa_vrfinit
, kcdsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
574 static const sigops eckcdsa_vrf
= {
575 ec_pubfetch
, sizeof(ec_pub
),
576 eckcdsa_vrfinit
, kcdsa_vrfdoit
, dsa_sigcheck
, dsa_sigdestroy
582 _(ed25519, ed25519ctx, ED25519, "Ed25519", sha512) \
583 _(ed448, ed448, ED448, "Ed448", shake256)
585 typedef struct eddsa_sigctx
{
590 static sig
*eddsa_siginit(key
*k
, void *kd
, const gchash
*hc
)
592 eddsa_sigctx
*es
= CREATE(eddsa_sigctx
);
594 es
->perso
= key_getattr(0, k
, "perso");
595 if (es
->perso
&& strlen(es
->perso
) > ED25519_MAXPERSOSZ
) {
596 die(1, "EdDSA personalization string too long (max length %d)",
602 static void eddsa_sigdestroy(sig
*s
)
603 { eddsa_sigctx
*es
= (eddsa_sigctx
*)s
; DESTROY(es
); }
605 #define EDDSADEF(ed, sigver, ED, name, hash) \
607 static int ed##_sigdoit(sig *s, dstr *d) \
609 eddsa_sigctx *es = (eddsa_sigctx *)s; \
610 ed##_priv *k = es->s.kd; \
612 dstr_ensure(d, ED##_SIGSZ); \
613 sigver##_sign((octet *)d->buf, k->priv.k, k->priv.sz, k->pub.k, \
614 es->perso ? 1 : -1, es->perso, \
615 es->perso ? strlen(es->perso) : 0, \
616 GH_DONE(es->s.h, 0), GH_CLASS(es->s.h)->hashsz); \
617 d->len += ED##_SIGSZ; \
621 static const char *ed##_sigcheck(sig *s) \
623 eddsa_sigctx *es = (eddsa_sigctx *)s; \
624 ed##_priv *k = es->s.kd; \
626 if (k->pub.sz != ED##_PUBSZ) \
627 return ("incorrect " #name " public key length"); \
631 static const sigops ed##_sig = { \
632 ed##_privfetch, sizeof(ed##_priv), \
633 eddsa_siginit, ed##_sigdoit, ed##_sigcheck, eddsa_sigdestroy \
636 static int ed##_vrfdoit(sig *s, dstr *d) \
638 eddsa_sigctx *es = (eddsa_sigctx *)s; \
639 ed##_pub *k = es->s.kd; \
641 if (d->len != ED##_SIGSZ) return (-1); \
642 return (sigver##_verify(k->pub.k, \
643 es->perso ? 1 : -1, es->perso, \
644 es->perso ? strlen(es->perso) : 0, \
645 GH_DONE(s->h, 0), GH_CLASS(s->h)->hashsz, \
646 (const octet *)d->buf)); \
649 static const char *ed##_vrfcheck(sig *s) \
651 ed##_pub *k = s->kd; \
653 if (k->pub.sz != ED##_PUBSZ) \
654 return ("incorrect " #name " public key length"); \
658 static const sigops ed##_vrf = { \
659 ed##_pubfetch, sizeof(ed##_pub), \
660 eddsa_siginit, ed##_vrfdoit, ed##_vrfcheck, eddsa_sigdestroy \
666 /* --- Symmetric message authentication --- */
668 typedef struct mac_ctx
{
676 static sig
*mac_init(key
*k
, void *kd
, const gchash
*hc
)
686 m
->kp
.e
= KENC_BINARY
;
690 if ((mm
= key_getattr(0 /*yik*/, k
, "mac")) == 0) {
691 dstr_putf(&d
, "%s-hmac", hc
->name
);
694 if ((m
->mc
= gmac_byname(mm
)) == 0)
695 die(EXIT_FAILURE
, "unknown message authentication scheme `%s'", mm
);
698 if ((err
= key_unpack(&m
->kp
, kd
, &d
)) != 0) {
699 die(EXIT_FAILURE
, "failed to unpack symmetric key `%s': %s",
700 d
.buf
, key_strerror(err
));
704 if (keysz(m
->kb
.sz
, m
->mc
->keysz
) != m
->kb
.sz
) {
705 die(EXIT_FAILURE
, "bad key size %lu for `%s'",
706 (unsigned long)m
->kb
.sz
, m
->mc
->name
);
708 m
->m
= GM_KEY(m
->mc
, m
->kb
.k
, m
->kb
.sz
);
709 m
->s
.h
= GM_INIT(m
->m
);
713 static int mac_sigdoit(sig
*s
, dstr
*d
)
715 mac_ctx
*m
= (mac_ctx
*)s
;
717 dstr_ensure(d
, m
->mc
->hashsz
);
718 GH_DONE(m
->s
.h
, d
->buf
);
719 d
->len
+= m
->mc
->hashsz
;
723 static int mac_vrfdoit(sig
*s
, dstr
*d
)
725 mac_ctx
*m
= (mac_ctx
*)s
;
728 t
= GH_DONE(m
->s
.h
, 0);
729 if (d
->len
!= m
->mc
->hashsz
|| !ct_memeq(d
->buf
, t
, d
->len
))
734 static const char *mac_check(sig
*s
) { return (0); }
736 static void mac_destroy(sig
*s
)
738 mac_ctx
*m
= (mac_ctx
*)s
;
740 key_unpackdone(&m
->kp
);
743 static const sigops mac_sig
= {
745 mac_init
, mac_sigdoit
, mac_check
, mac_destroy
748 static const sigops mac_vrf
= {
750 mac_init
, mac_vrfdoit
, mac_check
, mac_destroy
753 /* --- The switch table --- */
755 const struct sigtab sigtab
[] = {
756 { "rsapkcs1", &rsap1_sig
, &rsap1_vrf
, &sha
},
757 { "rsapss", &rsapss_sig
, &rsapss_vrf
, &sha
},
758 { "dsa", &dsa_sig
, &dsa_vrf
, &sha
},
759 { "bindsa", &bindsa_sig
, &bindsa_vrf
, &sha
},
760 { "ecdsa", &ecdsa_sig
, &ecdsa_vrf
, &sha
},
761 { "kcdsa", &kcdsa_sig
, &kcdsa_vrf
, &has160
},
762 { "binkcdsa", &binkcdsa_sig
, &binkcdsa_vrf
, &has160
},
763 { "eckcdsa", &eckcdsa_sig
, &eckcdsa_vrf
, &has160
},
764 #define EDDSATAB(ed, sigver, ED, name, hash) \
765 { #ed, &ed##_sig, &ed##_vrf, &hash },
768 { "mac", &mac_sig
, &mac_vrf
, &rmd160
},
772 /* --- @getsig@ --- *
774 * Arguments: @key *k@ = the key to load
775 * @const char *app@ = application name
776 * @int wantpriv@ = nonzero if we want to sign
778 * Returns: A signature-making thing.
780 * Use: Loads a key and starts hashing.
783 sig
*getsig(key
*k
, const char *app
, int wantpriv
)
785 const char *salg
, *halg
= 0;
792 const struct sigtab
*st
;
799 /* --- Setup stuff --- */
803 /* --- Get the signature algorithm --- *
805 * Take the attribute if it's there; otherwise use the key type.
809 if ((q
= key_getattr(0, k
, "sig")) != 0) {
812 } else if (strncmp(k
->type
, app
, n
) == 0 && k
->type
[n
] == '-') {
813 dstr_puts(&d
, k
->type
);
816 die(EXIT_FAILURE
, "no signature algorithm for key `%s'", t
.buf
);
818 /* --- Grab the hash algorithm --- *
820 * Grab it from the signature algorithm if it's there. But override that
821 * from the attribute.
825 if ((p
= strchr(p
, '/')) != 0) {
829 if ((q
= key_getattr(0, k
, "hash")) != 0)
832 /* --- Look up the algorithms in the table --- */
834 for (st
= sigtab
; st
->name
; st
++) {
835 if (strcmp(st
->name
, salg
) == 0)
838 die(EXIT_FAILURE
, "signature algorithm `%s' not found in key `%s'",
844 if ((ch
= ghash_byname(halg
)) == 0) {
845 die(EXIT_FAILURE
, "hash algorithm `%s' not found in key `%s'",
849 so
= wantpriv ? st
->signops
: st
->verifyops
;
851 /* --- Load the key --- */
858 kd
= xmalloc(so
->kdsz
);
859 kp
= key_fetchinit(so
->kf
, 0, kd
);
860 if ((e
= key_fetch(kp
, k
)) != 0) {
861 die(EXIT_FAILURE
, "error fetching key `%s': %s",
862 t
.buf
, key_strerror(e
));
865 s
= so
->init(k
, kd
, ch
);
873 /* --- Free stuff up --- */
880 /* --- @freesig@ --- *
882 * Arguments: @sig *s@ = signature-making thing
886 * Use: Frees up a signature-making thing
895 key_fetchdone(s
->kp
);
901 /*----- That's all, folks -------------------------------------------------*/