[catacomb-perl] / utils.c

/* -*-c-*-
 *
 * $Id$
 *
 * Utilities for Catacomb/Perl
 *
 * (c) 2001 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------* 
 *
 * This file is part of the Perl interface to Catacomb.
 *
 * Catacomb/Perl is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * Catacomb/Perl is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Catacomb/Perl; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*----- Header files ------------------------------------------------------*/

#include "catacomb-perl.h"
#include <catacomb/ec-guts.h>
#include <catacomb/group-guts.h>
#include <catacomb/field-guts.h>
#include <catacomb/ectab.h>
#include <catacomb/ptab.h>
#include <catacomb/bintab.h>

/*----- Lists of things ---------------------------------------------------*/

#define LISTS(LI)							\
  LI(list, lists[i].name, lists[i].name)				\
  LI(hash, ghashtab[i], ghashtab[i]->name)				\
  LI(prp, prptab[i], prptab[i]->name)					\
  LI(cipher, gciphertab[i], gciphertab[i]->name)			\
  LI(mac, gmactab[i], gmactab[i]->name)					\
  LI(mgfrand, mgftab[i].name, mgftab[i].name)				\
  LI(counterrand, ctrtab[i].name, ctrtab[i].name)			\
  LI(ofbrand, ofbtab[i].name, ofbtab[i].name)				\
  LI(ec, ectab[i].name, ectab[i].name)					\
  LI(prime, ptab[i].name, ptab[i].name)					\
  LI(bin, bintab[i].name, bintab[i].name)

#define XLISTFN(what, endp, name)					\
  static void list##what(void)						\
  {									\
    int i;								\
    dSP;								\
    for (i = 0; endp; i++)						\
      XPUSHs(sv_2mortal(newSVpv(name, 0)));				\
    PUTBACK;								\
  }

#define ENTRY(what, endp, name) { #what, list##what },

struct listent {
  const char *name;
  void (*list)(void);
};

static const struct listent lists[];

LISTS(XLISTFN)

static const struct listent lists[] = {
  LISTS(ENTRY)
  { 0, 0 }
};

void names(const char *name)
{
  int i;

  for (i = 0; lists[i].name; i++) {
    if (strcmp(name, lists[i].name) == 0) {
      lists[i].list();
      return;
    }
  }
  croak("unknown list `%s'", name);
}

/*----- Miscellaneous things ----------------------------------------------*/

U32 findconst(const struct consttab *cc, const char *pkg, const char *name)
{
  const char *p;
  if ((p = strrchr(name, ':')) != 0)
    name = p + 1;
  while (cc->name) {
    if (strcmp(cc->name, name) == 0)
      return (cc->val);
    cc++;
  }
  croak("unknown %s constant `%s'", pkg, name);
}

void ptrtosv(SV **sv, void *p, const char *type)
{
  if (p)
    sv_setref_pv(*sv, type, (void *)p);
  else
    *sv = &PL_sv_undef;
}

void *ptrfromsv(SV *sv, const char *type, const char *what, ...)
{
  if (!sv_derived_from(sv, type)) {
    va_list ap;
    SV *t = sv_newmortal();
    va_start(ap, what);
    sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0);      
    croak("%s is not of type %s", SvPVX(t), type);
  }
  return (void *)SvIV((SV *)SvRV(sv));
}

void *ptrfromsvdflt(SV *sv, const char *type, void *dflt, const char *what)
{
  if (!SvOK(sv))
    return (dflt);
  else
    return (ptrfromsv(sv, type, "%s", what));
}

/*----- Cursor reading stuff ----------------------------------------------*/

void c_init(cursor *c, SV *sv)
{
  if (!SvROK(sv))
    croak("not a reference");
  sv = SvRV(sv);
  switch (SvTYPE(sv)) {
    case SVt_PVAV:
      c->f = CF_ARRAY;
      c->u.a.av = (AV *)sv;
      c->u.a.i = 0;
      break;
    case SVt_PVHV:
      c->f = CF_HASH;
      c->u.hv = (HV *)sv;
      break;
    default:
      croak("must be hash ref or array ref");
  }
}

void c_skip(cursor *c)
{
  if (!(c->f & CF_HASH))
    c->u.a.i++;
}

SV *c_get(cursor *c, const char *tag, unsigned f)
{
  SV **sv;

  if (c->f & CF_HASH)
    sv = hv_fetch(c->u.hv, tag, strlen(tag), 0);
  else {
    sv = av_fetch(c->u.a.av, c->u.a.i, 0);
    if (sv) c->u.a.i++;
  }
  if ((f & CF_MUST) && !sv)
    croak("missing entry `%s'", tag);
  return (sv ? *sv : &PL_sv_undef);
}

void hvput(HV *hv, const char *k, SV *val)
{
  SV **sv = hv_fetch(hv, k, strlen(k), 1);
  if (!sv)
    croak("couldn't set hash key %s", k);
  *sv = val;
}

/*----- Wrapped objects ---------------------------------------------------*/

static SV *firstelt(SV *sv, const char *what)
{
  AV *av;
  SV **svp;

  if (!SvROK(sv))
    croak("%s is not a reference", what);
  sv = SvRV(sv);
  if (SvTYPE(sv) != SVt_PVAV)
    croak("%s is not an array reference", what);
  av = (AV *)sv;
  svp = av_fetch(av, 0, 0);
  if (!svp)
    croak("%s is empty", what);
  return (*svp);
}

ge *groupelt(SV *sv, const char *what)
{
  if (sv_derived_from(sv, "Catacomb::Group::Elt"))
    sv = firstelt(sv, what);
  return (ptrfromsv(sv, "Catacomb::Group::Element", what));
}

mp *fieldelt(SV *sv, const char *what)
{
  if (sv_derived_from(sv, "Catacomb::Field::Elt"))
    sv = firstelt(sv, what);
  return (mp_fromsv(sv, what, 0, 0));
}

ec *ecpt(SV *sv, const char *what)
{
  if (sv_derived_from(sv, "Catacomb::EC::Pt"))
    sv = firstelt(sv, what);
  return (ptrfromsv(sv, "Catacomb::EC::Point", what));
}

/*----- DSA contexts ------------------------------------------------------*/

void gdsa_privfromsv(gdsa *g, SV *sv)
{
  cursor c;

  c_init(&c, sv);
  g->g = C_PTR(&c, "G", "Catacomb::Group");
  g->p = C_GE(&c, "p");
  g->u = C_MP(&c, "u");
  g->h = C_PTR(&c, "h", "Catacomb::HashClass");
  g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
}

void gdsa_pubfromsv(gdsa *g, SV *sv)
{
  cursor c;

  c_init(&c, sv);
  g->g = C_PTR(&c, "G", "Catacomb::Group");
  g->p = C_GE(&c, "p");
  c_skip(&c);
  g->h = C_PTR(&c, "h", "Catacomb::HashClass");
  g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
}

/*----- RSA padding contexts ----------------------------------------------*/

void pkcs1_fromsv(pkcs1 *p, SV *sv)
{
  cursor c;
  STRLEN len;
  SV *t;

  c_init(&c, sv);
  t = c_get(&c, "ep", 0);
  if (SvOK(t)) {
    p->ep = SvPV(t, len);
    p->epsz = len;
  } else {
    p->ep = 0;
    p->epsz = 0;
  }
  p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
}

void oaep_fromsv(oaep *p, SV *sv)
{
  cursor c;
  STRLEN len;
  SV *t;

  c_init(&c, sv);
  p->cc = C_PTR(&c, "c", "Catacomb::CipherClass");
  p->ch = C_PTR(&c, "h", "Catacomb::HashClass");
  t = c_get(&c, "ep", 0);
  if (SvOK(t)) {
    p->ep = SvPV(t, len);
    p->epsz = len;
  } else {
    p->ep = 0;
    p->epsz = 0;
  }
  p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
}

void pss_fromsv(pss *p, SV *sv)
{
  cursor c;
  STRLEN len;
  SV *t;

  c_init(&c, sv);
  p->cc = C_PTR(&c, "c", "Catacomb::CipherClass");
  p->ch = C_PTR(&c, "h", "Catacomb::HashClass");
  t = c_get(&c, "ssz", 0);
  p->ssz = SvOK(t) ? SvUV(t) : p->ch->hashsz;
  p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
}

/*----- Reconstructing various objects ------------------------------------*/

static SV *collect(SV *thing, ...)
{
  va_list ap;
  AV *av;

  va_start(ap, thing);
  av = newAV();
  while (thing) {
    av_push(av, thing);
    thing = va_arg(ap, SV *);
  }
  va_end(ap);
  return (newRV_noinc((SV *)av));
}

/* --- Somewhat unpleasant, really --- */

SV *info_field(field *f)
{
  const char *n = F_NAME(f);

  if (strcmp(n, "prime") == 0 || strcmp(n, "niceprime") == 0 ||
      strcmp(n, "binpoly") == 0)
    return (collect(newSVpv(n, 0), MAKE_MP(MP_COPY(f->m)), (SV *)0));
  else if (strcmp(n, "binnorm") == 0) {
    fctx_binnorm *fc = (fctx_binnorm *)f;
    return (collect(newSVpv(n, 0),
		    MAKE_MP(MP_COPY(f->m)),
		    MAKE_MP(MP_COPY(fc->ntop.r[fc->ntop.n - 1])),
		    (SV *)0));
  } else
    return (&PL_sv_undef);
}

field *copy_field(field *f)
{
  if (strcmp(F_NAME(f), "prime") == 0)
    f = field_prime(f->m);
  else if (strcmp(F_NAME(f), "niceprime") == 0)
    f = field_niceprime(f->m);
  else if (strcmp(F_NAME(f), "binpoly") == 0)
    f = field_binpoly(f->m);
  else if (strcmp(F_NAME(f), "binnorm") == 0) {
    fctx_binnorm *fc = (fctx_binnorm *)f;
    f = field_binnorm(f->m, fc->ntop.r[fc->ntop.n - 1]);
  } else
    f = 0;
  return (f);
}

SV *info_curve(ec_curve *c)
{
  field *f = c->f;
  const char *n = EC_NAME(c);
  SV *fsv;
  mp *a, *b;

  fsv = info_field(f);
  if (!SvOK(fsv))
    return (&PL_sv_undef);
  a = F_OUT(f, MP_NEW, c->a);
  b = F_OUT(f, MP_NEW, c->b);
  if (strcmp(n, "prime") == 0 || strcmp(n, "primeproj") == 0 ||
      strcmp(n, "bin") == 0 || strcmp(n, "binproj") == 0)
    return (collect(newSVpv(n, 0), fsv, MAKE_MP(a), MAKE_MP(b), (SV *)0));
  else {
    MP_DROP(a);
    MP_DROP(b);
    SvREFCNT_dec(fsv);
    return (&PL_sv_undef);
  }
}

ec_curve *copy_curve(ec_curve *c)
{
  field *f;
  mp *a, *b;

  if ((f = copy_field(c->f)) == 0)
    return (0);
  a = F_OUT(f, MP_NEW, c->a);
  b = F_OUT(f, MP_NEW, c->b);
  if (strcmp(EC_NAME(c), "prime") == 0)
    c = ec_prime(f, a, b);
  else if (strcmp(EC_NAME(c), "primeproj") == 0)
    c = ec_primeproj(f, a, b);
  else if (strcmp(EC_NAME(c), "bin") == 0)
    c = ec_bin(f, a, b);
  else if (strcmp(EC_NAME(c), "binproj") == 0)
    c = ec_binproj(f, a, b);
  else
    c = 0;
  MP_DROP(a);
  MP_DROP(b);
  if (!c) F_DESTROY(f);
  return (c);
}

SV *info_group(group *g)
{
  const char *n = G_NAME(g);

  if (strcmp(n, "prime") == 0) {
    gctx_prime *gc = (gctx_prime *)g;
    return (collect(newSVpv(n, 0),
		    MAKE_MP(MP_COPY(gc->mm.m)),
		    MAKE_MP(G_TOINT(g, MP_NEW, g->g)),
		    MAKE_MP(MP_COPY(gc->g.r)),
		    (SV *)0));
  } else if (strcmp(n, "bin") == 0) {
    gctx_bin *gc = (gctx_bin *)g;
    return (collect(newSVpv(n, 0),
		    MAKE_MP(MP_COPY(gc->r.p)),
		    MAKE_GF(G_TOINT(g, MP_NEW, g->g)),
		    MAKE_MP(MP_COPY(gc->g.r)),
		    (SV *)0));
  } else if (strcmp(n, "ec") == 0) {
    gctx_ec *gc = (gctx_ec *)g;
    SV *csv = info_curve(gc->ei.c);
    ec *gen;
    if (!SvOK(csv))
      return (&PL_sv_undef);
    gen = CREATE(ec);
    EC_CREATE(gen);
    EC_COPY(gen, &gc->ei.g);
    return (collect(newSVpv(n, 0),
		    csv,
		    MAKE(gen, "Catacomb::EC::Point"),
		    MAKE_MP(MP_COPY(gc->ei.r)),
		    MAKE_MP(MP_COPY(gc->ei.h)),
		    (SV *)0));
  } else
    return (&PL_sv_undef);  
}

group *copy_group(group *g)
{
  if (strcmp(G_NAME(g), "prime") == 0) {
    gctx_prime *gc = (gctx_prime *)g;
    gprime_param gp;
    gp.g = G_TOINT(g, MP_NEW, g->g);
    gp.p = gc->mm.m;
    gp.q = gc->g.r;
    g = group_prime(&gp);
    MP_DROP(gp.g);
  } else if (strcmp(G_NAME(g), "bin") == 0) {
    gctx_bin *gc = (gctx_bin *)g;
    gbin_param gb;
    gb.g = G_TOINT(g, MP_NEW, g->g);
    gb.p = gc->r.p;
    gb.q = gc->g.r;
    g = group_binary(&gb);
    MP_DROP(gb.g);    
  } else if (strcmp(G_NAME(g), "ec") == 0) {
    gctx_ec *gc = (gctx_ec *)g;
    ec_info ei;
    if ((ei.c = copy_curve(gc->ei.c)) == 0)
      return (0);
    EC_CREATE(&ei.g);
    EC_COPY(&ei.g, &gc->ei.g);
    ei.r = MP_COPY(gc->ei.r);
    ei.h = MP_COPY(gc->ei.h);
    g = group_ec(&ei);
  } else
    g = 0;
  return (g);
}

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
660b443c	1	/* --c--
660b443c	2	*
a1a90aaf	3	* $Id$
660b443c	4	*
	5	* Utilities for Catacomb/Perl
	6	*
	7	* (c) 2001 Straylight/Edgeware
	8	*/
	9
	10	/----- Licensing notice --------------------------------------------------
	11	*
	12	* This file is part of the Perl interface to Catacomb.
	13	*
	14	* Catacomb/Perl is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License as published by
	16	* the Free Software Foundation; either version 2 of the License, or
	17	* (at your option) any later version.
	18	*
	19	* Catacomb/Perl 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 General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with Catacomb/Perl; if not, write to the Free Software Foundation,
	26	* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	27	*/
	28
660b443c	29	/----- Header files ------------------------------------------------------/
	30
	31	#include "catacomb-perl.h"
f9952aec	32	#include <catacomb/ec-guts.h>
	33	#include <catacomb/group-guts.h>
	34	#include <catacomb/field-guts.h>
fcd15e0b	35	#include <catacomb/ectab.h>
	36	#include <catacomb/ptab.h>
	37	#include <catacomb/bintab.h>
660b443c	38
fcd15e0b	39	/----- Lists of things ---------------------------------------------------/
	40
	41	#define LISTS(LI) \
	42	LI(list, lists[i].name, lists[i].name) \
	43	LI(hash, ghashtab[i], ghashtab[i]->name) \
	44	LI(prp, prptab[i], prptab[i]->name) \
	45	LI(cipher, gciphertab[i], gciphertab[i]->name) \
	46	LI(mac, gmactab[i], gmactab[i]->name) \
	47	LI(mgfrand, mgftab[i].name, mgftab[i].name) \
	48	LI(counterrand, ctrtab[i].name, ctrtab[i].name) \
	49	LI(ofbrand, ofbtab[i].name, ofbtab[i].name) \
	50	LI(ec, ectab[i].name, ectab[i].name) \
	51	LI(prime, ptab[i].name, ptab[i].name) \
	52	LI(bin, bintab[i].name, bintab[i].name)
	53
	54	#define XLISTFN(what, endp, name) \
	55	static void list##what(void) \
	56	{ \
	57	int i; \
	58	dSP; \
	59	for (i = 0; endp; i++) \
	60	XPUSHs(sv_2mortal(newSVpv(name, 0))); \
	61	PUTBACK; \
	62	}
	63
	64	#define ENTRY(what, endp, name) { #what, list##what },
	65
	66	struct listent {
	67	const char *name;
	68	void (*list)(void);
	69	};
	70
	71	static const struct listent lists[];
	72
	73	LISTS(XLISTFN)
	74
	75	static const struct listent lists[] = {
	76	LISTS(ENTRY)
	77	{ 0, 0 }
	78	};
	79
	80	void names(const char *name)
	81	{
	82	int i;
	83
	84	for (i = 0; lists[i].name; i++) {
	85	if (strcmp(name, lists[i].name) == 0) {
	86	lists[i].list();
	87	return;
	88	}
	89	}
	90	croak("unknown list `%s'", name);
	91	}
	92
	93	/----- Miscellaneous things ----------------------------------------------/
660b443c	94
	95	U32 findconst(const struct consttab cc, const char pkg, const char *name)
	96	{
	97	const char *p;
	98	if ((p = strrchr(name, ':')) != 0)
	99	name = p + 1;
	100	while (cc->name) {
	101	if (strcmp(cc->name, name) == 0)
	102	return (cc->val);
	103	cc++;
	104	}
	105	croak("unknown %s constant `%s'", pkg, name);
	106	}
	107
a1a90aaf	108	void ptrtosv(SV *sv, void p, const char *type)
	109	{
	110	if (p)
	111	sv_setref_pv(sv, type, (void )p);
	112	else
	113	*sv = &PL_sv_undef;
	114	}
	115
	116	void ptrfromsv(SV sv, const char type, const char what, ...)
	117	{
	118	if (!sv_derived_from(sv, type)) {
	119	va_list ap;
	120	SV *t = sv_newmortal();
	121	va_start(ap, what);
	122	sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0);
	123	croak("%s is not of type %s", SvPVX(t), type);
	124	}
	125	return (void )SvIV((SV )SvRV(sv));
	126	}
	127
fcd15e0b	128	void ptrfromsvdflt(SV sv, const char type, void dflt, const char *what)
	129	{
	130	if (!SvOK(sv))
	131	return (dflt);
	132	else
	133	return (ptrfromsv(sv, type, "%s", what));
	134	}
	135
	136	/----- Cursor reading stuff ----------------------------------------------/
	137
	138	void c_init(cursor c, SV sv)
	139	{
	140	if (!SvROK(sv))
	141	croak("not a reference");
	142	sv = SvRV(sv);
	143	switch (SvTYPE(sv)) {
	144	case SVt_PVAV:
	145	c->f = CF_ARRAY;
	146	c->u.a.av = (AV *)sv;
	147	c->u.a.i = 0;
	148	break;
	149	case SVt_PVHV:
	150	c->f = CF_HASH;
	151	c->u.hv = (HV *)sv;
	152	break;
	153	default:
	154	croak("must be hash ref or array ref");
	155	}
	156	}
	157
	158	void c_skip(cursor *c)
	159	{
	160	if (!(c->f & CF_HASH))
	161	c->u.a.i++;
	162	}
	163
	164	SV c_get(cursor c, const char *tag, unsigned f)
	165	{
	166	SV **sv;
	167
	168	if (c->f & CF_HASH)
	169	sv = hv_fetch(c->u.hv, tag, strlen(tag), 0);
	170	else {
	171	sv = av_fetch(c->u.a.av, c->u.a.i, 0);
	172	if (sv) c->u.a.i++;
	173	}
	174	if ((f & CF_MUST) && !sv)
	175	croak("missing entry `%s'", tag);
	176	return (sv ? *sv : &PL_sv_undef);
	177	}
	178
	179	void hvput(HV hv, const char k, SV *val)
	180	{
	181	SV **sv = hv_fetch(hv, k, strlen(k), 1);
	182	if (!sv)
	183	croak("couldn't set hash key %s", k);
	184	*sv = val;
	185	}
	186
	187	/----- Wrapped objects ---------------------------------------------------/
	188
	189	static SV firstelt(SV sv, const char *what)
	190	{
	191	AV *av;
192	SV **svp;
193
194	if (!SvROK(sv))
195	croak("%s is not a reference", what);
196	sv = SvRV(sv);
197	if (SvTYPE(sv) != SVt_PVAV)
198	croak("%s is not an array reference", what);
199	av = (AV *)sv;
200	svp = av_fetch(av, 0, 0);
201	if (!svp)
202	croak("%s is empty", what);
203	return (*svp);
204	}
205
206	ge groupelt(SV sv, const char *what)
207	{
208	if (sv_derived_from(sv, "Catacomb::Group::Elt"))
209	sv = firstelt(sv, what);
210	return (ptrfromsv(sv, "Catacomb::Group::Element", what));
211	}
212
213	mp fieldelt(SV sv, const char *what)
214	{
215	if (sv_derived_from(sv, "Catacomb::Field::Elt"))
216	sv = firstelt(sv, what);
217	return (mp_fromsv(sv, what, 0, 0));
218	}
219
220	ec ecpt(SV sv, const char *what)
221	{
222	if (sv_derived_from(sv, "Catacomb::EC::Pt"))
223	sv = firstelt(sv, what);
224	return (ptrfromsv(sv, "Catacomb::EC::Point", what));
225	}
226
227	/----- DSA contexts ------------------------------------------------------/
228
229	void gdsa_privfromsv(gdsa g, SV sv)
230	{
231	cursor c;
232
233	c_init(&c, sv);
234	g->g = C_PTR(&c, "G", "Catacomb::Group");
235	g->p = C_GE(&c, "p");
236	g->u = C_MP(&c, "u");
237	g->h = C_PTR(&c, "h", "Catacomb::HashClass");
238	g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
239	}
240
241	void gdsa_pubfromsv(gdsa g, SV sv)
242	{
243	cursor c;
244
245	c_init(&c, sv);
246	g->g = C_PTR(&c, "G", "Catacomb::Group");
247	g->p = C_GE(&c, "p");
248	c_skip(&c);
249	g->h = C_PTR(&c, "h", "Catacomb::HashClass");
250	g->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
251	}
252
253	/----- RSA padding contexts ----------------------------------------------/
254
255	void pkcs1_fromsv(pkcs1 p, SV sv)
256	{
257	cursor c;
258	STRLEN len;
259	SV *t;
260
261	c_init(&c, sv);
262	t = c_get(&c, "ep", 0);
263	if (SvOK(t)) {
264	p->ep = SvPV(t, len);
265	p->epsz = len;
266	} else {
267	p->ep = 0;
268	p->epsz = 0;
269	}
270	p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
271	}
272
273	void oaep_fromsv(oaep p, SV sv)
274	{
275	cursor c;
276	STRLEN len;
277	SV *t;
278
279	c_init(&c, sv);
280	p->cc = C_PTR(&c, "c", "Catacomb::CipherClass");
281	p->ch = C_PTR(&c, "h", "Catacomb::HashClass");
282	t = c_get(&c, "ep", 0);
283	if (SvOK(t)) {
284	p->ep = SvPV(t, len);
285	p->epsz = len;
286	} else {
287	p->ep = 0;
288	p->epsz = 0;
289	}
290	p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
291	}
292
293	void pss_fromsv(pss p, SV sv)
294	{
295	cursor c;
296	STRLEN len;
297	SV *t;
298
299	c_init(&c, sv);
300	p->cc = C_PTR(&c, "c", "Catacomb::CipherClass");
301	p->ch = C_PTR(&c, "h", "Catacomb::HashClass");
302	t = c_get(&c, "ssz", 0);
303	p->ssz = SvOK(t) ? SvUV(t) : p->ch->hashsz;
304	p->r = C_PTRDFLT(&c, "rng", "Catacomb::Rand", &rand_global);
305	}
306
f9952aec	307	/----- Reconstructing various objects ------------------------------------/
f9952aec	308
fcd15e0b	309	static SV collect(SV thing, ...)
	310	{
	311	va_list ap;
	312	AV *av;
	313
	314	va_start(ap, thing);
	315	av = newAV();
	316	while (thing) {
	317	av_push(av, thing);
	318	thing = va_arg(ap, SV *);
	319	}
	320	va_end(ap);
	321	return (newRV_noinc((SV *)av));
	322	}
	323
f9952aec	324	/* --- Somewhat unpleasant, really --- */
f9952aec	325
fcd15e0b	326	SV info_field(field f)
	327	{
	328	const char *n = F_NAME(f);
	329
	330	if (strcmp(n, "prime") == 0 \|\| strcmp(n, "niceprime") == 0 \|\|
	331	strcmp(n, "binpoly") == 0)
	332	return (collect(newSVpv(n, 0), MAKE_MP(MP_COPY(f->m)), (SV *)0));
	333	else if (strcmp(n, "binnorm") == 0) {
	334	fctx_binnorm fc = (fctx_binnorm )f;
	335	return (collect(newSVpv(n, 0),
	336	MAKE_MP(MP_COPY(f->m)),
	337	MAKE_MP(MP_COPY(fc->ntop.r[fc->ntop.n - 1])),
	338	(SV *)0));
	339	} else
	340	return (&PL_sv_undef);
	341	}
	342
f9952aec	343	field copy_field(field f)
	344	{
	345	if (strcmp(F_NAME(f), "prime") == 0)
	346	f = field_prime(f->m);
	347	else if (strcmp(F_NAME(f), "niceprime") == 0)
	348	f = field_niceprime(f->m);
	349	else if (strcmp(F_NAME(f), "binpoly") == 0)
	350	f = field_binpoly(f->m);
	351	else if (strcmp(F_NAME(f), "binnorm") == 0) {
	352	fctx_binnorm fc = (fctx_binnorm )f;
	353	f = field_binnorm(f->m, fc->ntop.r[fc->ntop.n - 1]);
	354	} else
	355	f = 0;
	356	return (f);
	357	}
	358
fcd15e0b	359	SV info_curve(ec_curve c)
	360	{
	361	field *f = c->f;
	362	const char *n = EC_NAME(c);
	363	SV *fsv;
	364	mp a, b;
	365
	366	fsv = info_field(f);
	367	if (!SvOK(fsv))
	368	return (&PL_sv_undef);
	369	a = F_OUT(f, MP_NEW, c->a);
	370	b = F_OUT(f, MP_NEW, c->b);
	371	if (strcmp(n, "prime") == 0 \|\| strcmp(n, "primeproj") == 0 \|\|
	372	strcmp(n, "bin") == 0 \|\| strcmp(n, "binproj") == 0)
	373	return (collect(newSVpv(n, 0), fsv, MAKE_MP(a), MAKE_MP(b), (SV *)0));
	374	else {
	375	MP_DROP(a);
	376	MP_DROP(b);
	377	SvREFCNT_dec(fsv);
	378	return (&PL_sv_undef);
	379	}
	380	}
	381
f9952aec	382	ec_curve copy_curve(ec_curve c)
	383	{
	384	field *f;
	385	mp a, b;
	386
	387	if ((f = copy_field(c->f)) == 0)
	388	return (0);
	389	a = F_OUT(f, MP_NEW, c->a);
	390	b = F_OUT(f, MP_NEW, c->b);
	391	if (strcmp(EC_NAME(c), "prime") == 0)
	392	c = ec_prime(f, a, b);
	393	else if (strcmp(EC_NAME(c), "primeproj") == 0)
	394	c = ec_primeproj(f, a, b);
fcd15e0b	395	else if (strcmp(EC_NAME(c), "bin") == 0)
f9952aec	396	c = ec_bin(f, a, b);
	397	else if (strcmp(EC_NAME(c), "binproj") == 0)
	398	c = ec_binproj(f, a, b);
	399	else
	400	c = 0;
	401	MP_DROP(a);
	402	MP_DROP(b);
	403	if (!c) F_DESTROY(f);
	404	return (c);
	405	}
	406
fcd15e0b	407	SV info_group(group g)
	408	{
	409	const char *n = G_NAME(g);
	410
	411	if (strcmp(n, "prime") == 0) {
	412	gctx_prime gc = (gctx_prime )g;
	413	return (collect(newSVpv(n, 0),
	414	MAKE_MP(MP_COPY(gc->mm.m)),
	415	MAKE_MP(G_TOINT(g, MP_NEW, g->g)),
	416	MAKE_MP(MP_COPY(gc->g.r)),
	417	(SV *)0));
	418	} else if (strcmp(n, "bin") == 0) {
	419	gctx_bin gc = (gctx_bin )g;
	420	return (collect(newSVpv(n, 0),
	421	MAKE_MP(MP_COPY(gc->r.p)),
	422	MAKE_GF(G_TOINT(g, MP_NEW, g->g)),
	423	MAKE_MP(MP_COPY(gc->g.r)),
	424	(SV *)0));
	425	} else if (strcmp(n, "ec") == 0) {
	426	gctx_ec gc = (gctx_ec )g;
	427	SV *csv = info_curve(gc->ei.c);
	428	ec *gen;
	429	if (!SvOK(csv))
	430	return (&PL_sv_undef);
	431	gen = CREATE(ec);
	432	EC_CREATE(gen);
	433	EC_COPY(gen, &gc->ei.g);
	434	return (collect(newSVpv(n, 0),
	435	csv,
	436	MAKE(gen, "Catacomb::EC::Point"),
	437	MAKE_MP(MP_COPY(gc->ei.r)),
	438	MAKE_MP(MP_COPY(gc->ei.h)),
	439	(SV *)0));
	440	} else
	441	return (&PL_sv_undef);
	442	}
	443
f9952aec	444	group copy_group(group g)
	445	{
	446	if (strcmp(G_NAME(g), "prime") == 0) {
	447	gctx_prime gc = (gctx_prime )g;
	448	gprime_param gp;
	449	gp.g = G_TOINT(g, MP_NEW, g->g);
	450	gp.p = gc->mm.m;
	451	gp.q = gc->g.r;
	452	g = group_prime(&gp);
	453	MP_DROP(gp.g);
fcd15e0b	454	} else if (strcmp(G_NAME(g), "bin") == 0) {
	455	gctx_bin gc = (gctx_bin )g;
	456	gbin_param gb;
	457	gb.g = G_TOINT(g, MP_NEW, g->g);
	458	gb.p = gc->r.p;
	459	gb.q = gc->g.r;
	460	g = group_binary(&gb);
	461	MP_DROP(gb.g);
f9952aec	462	} else if (strcmp(G_NAME(g), "ec") == 0) {
	463	gctx_ec gc = (gctx_ec )g;
	464	ec_info ei;
	465	if ((ei.c = copy_curve(gc->ei.c)) == 0)
	466	return (0);
	467	EC_CREATE(&ei.g);
	468	EC_COPY(&ei.g, &gc->ei.g);
	469	ei.r = MP_COPY(gc->ei.r);
	470	ei.h = MP_COPY(gc->ei.h);
	471	g = group_ec(&ei);
	472	} else
	473	g = 0;
	474	return (g);
	475	}
	476
660b443c	477	/----- That's all, folks -------------------------------------------------/