5 * (c) 2004 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the Python interface to Catacomb.
12 * Catacomb/Python is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * Catacomb/Python 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 General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with Catacomb/Python; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
29 #include "catacomb-python.h"
31 /*----- Utility functions -------------------------------------------------*/
33 PyTypeObject *ecpt_pytype;
34 PyTypeObject *ecptcurve_pytype;
35 PyTypeObject *eccurve_pytype;
36 PyTypeObject *ecprimecurve_pytype;
37 PyTypeObject *ecprimeprojcurve_pytype;
38 PyTypeObject *ecbincurve_pytype;
39 PyTypeObject *ecbinprojcurve_pytype;
40 PyTypeObject *ecinfo_pytype;
42 ec_curve *eccurve_copy(ec_curve *c)
47 if ((f = field_copy(c->f)) == 0)
49 a = F_OUT(f, MP_NEW, c->a);
50 b = F_OUT(f, MP_NEW, c->b);
51 if (STRCMP(EC_NAME(c), ==, "prime"))
52 c = ec_prime(f, a, b);
53 else if (STRCMP(EC_NAME(c), ==, "primeproj"))
54 c = ec_primeproj(f, a, b);
55 else if (STRCMP(EC_NAME(c), ==, "bin"))
57 else if (STRCMP(EC_NAME(c), ==, "binproj"))
58 c = ec_binproj(f, a, b);
67 static PyObject *ecpt_dopywrap(PyObject *cobj, ec_curve *c, ec *p)
69 ecpt_pyobj *z = PyObject_New(ecpt_pyobj, (PyTypeObject *)cobj);
73 return ((PyObject *)z);
76 PyObject *ecpt_pywrap(PyObject *cobj, ec *p)
77 { return (ecpt_dopywrap(cobj, ECCURVE_C(cobj), p)); }
79 PyObject *ecpt_pywrapout(void *cobj, ec *p)
83 if (!PyType_IsSubtype(cobj, ecptcurve_pytype))
87 EC_IN(ECCURVE_C(cobj), p, p);
89 return (ecpt_dopywrap(cobj, c, p));
92 int toecpt(ec_curve *c, ec *d, PyObject *p)
94 if (ECPTCURVE_PYCHECK(p)) {
95 if (ECPT_C(p) != c && !ec_samep(ECPT_C(p), c))
97 EC_COPY(d, ECPT_P(p));
98 } else if (ECPT_PYCHECK(p))
99 EC_IN(c, d, ECPT_P(p));
105 int getecpt(ec_curve *c, ec *d, PyObject *p)
107 if (toecpt(c, d, p)) {
108 PyErr_Format(PyExc_TypeError, "can't convert %.100s to ecpt",
109 p->ob_type->tp_name);
115 void getecptout(ec *d, PyObject *p)
117 if (ECPTCURVE_PYCHECK(p))
118 EC_OUT(ECPT_C(p), d, ECPT_P(p));
120 assert(ECPT_PYCHECK(p));
121 EC_COPY(d, ECPT_P(p));
125 int convecpt(PyObject *o, void *p)
127 if (!ECPT_PYCHECK(o))
128 TYERR("want elliptic curve point");
135 /*----- Curve points ------------------------------------------------------*/
137 static int ecbinop(PyObject *x, PyObject *y,
138 ec_curve **c, PyObject **cobj, ec *xx, ec *yy)
140 if (ECPTCURVE_PYCHECK(x)) *cobj = ECPT_COBJ(x);
141 else if (ECPTCURVE_PYCHECK(y)) *cobj = ECPT_COBJ(y);
143 *c = ECCURVE_C(*cobj);
144 if (toecpt(*c, xx, x) || toecpt(*c, yy, y)) return (-1);
148 #define BINOP(name) \
149 static PyObject *ecpt_py##name(PyObject *x, PyObject *y) { \
150 ec xx = EC_INIT, yy = EC_INIT, zz = EC_INIT; \
153 if (ecbinop(x, y, &c, &cobj, &xx, &yy)) RETURN_NOTIMPL; \
154 c->ops->name(c, &zz, &xx, &yy); \
155 EC_DESTROY(&xx); EC_DESTROY(&yy); \
156 return (ecpt_pywrap(ECPT_COBJ(x), &zz)); \
163 static PyObject *ecpt_py##name(PyObject *x) { \
165 ec_curve *c = ECPT_C(x); \
166 c->ops->name(c, &zz, ECPT_P(x)); \
167 return (ecpt_pywrap(ECPT_COBJ(x), &zz)); \
172 static PyObject *ecpt_pyid(PyObject *x) { RETURN_OBJ(x); }
174 static int ecpt_pynonzerop(PyObject *x) { return (!EC_ATINF(ECPT_P(x))); }
176 static void ecpt_pydealloc(PyObject *x)
178 EC_DESTROY(ECPT_P(x));
179 Py_DECREF(ECPT_COBJ(x));
183 static PyObject *ecpt_pymul(PyObject *x, PyObject *y)
188 if (ECPT_PYCHECK(x)) { PyObject *t; t = x; x = y; y = t; }
189 if (!ECPT_PYCHECK(y) || (xx = tomp(x)) == 0) RETURN_NOTIMPL;
190 ec_imul(ECPT_C(y), &zz, ECPT_P(y), xx);
192 return (ecpt_pywrap(ECPT_COBJ(y), &zz));
195 static long ecpt_pyhash(PyObject *me)
201 if (EC_ATINF(&p)) h = 0x81d81a94;
202 else h = 0xe0fdd039 ^ (2*mphash(p.x)) ^ (3*mphash(p.y));
207 static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
209 ec p = EC_INIT, q = EC_INIT;
213 if (!ECPT_PYCHECK(y)) RETURN_NOTIMPL;
217 case Py_EQ: b = EC_EQ(&p, &q); break;
218 case Py_NE: b = !EC_EQ(&p, &q); break;
219 default: TYERR("elliptic curve points are unordered");
228 static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
230 if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
231 return (getbool(EC_ATINF(ECPT_P(me)) ||
232 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
235 static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
238 if (!PyArg_ParseTuple(arg, ":dbl")) return (0);
239 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
240 return (ecpt_pywrap(ECPT_COBJ(me), &p));
243 static PyObject *epmeth_tobuf(PyObject *me, PyObject *arg)
250 if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
255 n = mp_octets(p.x) + mp_octets(p.y) + 6;
256 rc = bytestring_pywrap(0, n);
257 buf_init(&b, PyString_AS_STRING(rc), n);
260 _PyString_Resize(&rc, BLEN(&b));
265 static PyObject *epmeth_toraw(PyObject *me, PyObject *arg)
270 ec_curve *c = ECPT_C(me);
274 if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
275 len = c->f->noctets * 2 + 1;
276 rc = bytestring_pywrap(0, len);
277 p = PyString_AS_STRING(rc);
278 buf_init(&b, p, len);
279 EC_OUT(c, &pp, ECPT_P(me));
280 ec_putraw(c, &b, &pp);
282 _PyString_Resize(&rc, BLEN(&b));
286 static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
291 ec_curve *c = ECPT_C(me);
293 unsigned f = EC_EXPLY;
295 static const char *const kwlist[] = { "flags", 0 };
297 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:ec2osp", KWLIST,
300 len = c->f->noctets * 2 + 1;
301 rc = bytestring_pywrap(0, len);
302 p = PyString_AS_STRING(rc);
303 buf_init(&b, p, len);
304 EC_OUT(c, &pp, ECPT_P(me));
305 if (ec_ec2osp(c, f, &b, &pp)) {
306 Py_DECREF(rc); rc = 0;
307 VALERR("invalid flags");
310 _PyString_Resize(&rc, BLEN(&b));
315 static PyObject *epget_curve(PyObject *me, void *hunoz)
316 { RETURN_OBJ(ECPT_COBJ(me)); }
318 static PyObject *epncget_ix(PyObject *me, void *hunoz)
322 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
324 rc = mp_pywrap(MP_COPY(p.x));
329 static PyObject *epncget_iy(PyObject *me, void *hunoz)
333 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
335 rc = mp_pywrap(MP_COPY(p.y));
340 static PyObject *epncget_point(PyObject *me, void *hunoz)
343 static PyObject *epget_point(PyObject *me, void *hunoz)
347 return (ecpt_pywrapout(ecpt_pytype, &p));
350 static PyObject *epget_x(PyObject *me, void *hunoz)
352 ec_curve *c = ECPT_C(me);
354 PyObject *fobj = ECPT_FOBJ(me);
358 if (EC_ATINF(pp)) RETURN_NONE;
360 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
365 static PyObject *epget_y(PyObject *me, void *hunoz)
367 ec_curve *c = ECPT_C(me);
369 PyObject *fobj = ECPT_FOBJ(me);
373 if (EC_ATINF(pp)) RETURN_NONE;
375 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
380 static PyObject *epget__x(PyObject *me, void *hunoz)
382 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
383 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
386 static PyObject *epget__y(PyObject *me, void *hunoz)
388 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
389 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
392 static PyObject *epget__z(PyObject *me, void *hunoz)
394 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
395 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
398 static mp *coord_in(field *f, PyObject *x)
401 if (FE_PYCHECK(x) && FE_F(x) == f)
402 return (MP_COPY(FE_X(x)));
403 else if ((xx = getmp(x)) == 0)
406 return (F_IN(f, xx, xx));
409 static int ecptxl_3(ec_curve *c, ec *p,
410 PyObject *x, PyObject *y, PyObject *z)
414 if (!x || !y || !z) TYERR("missing argument");
415 if (!c) VALERR("internal form with no curve!");
416 if ((p->x = coord_in(c->f, x)) == 0 ||
417 (p->y = coord_in(c->f, y)) == 0 ||
418 (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
420 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
426 static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
430 if (!x || !y) TYERR("missing argument");
431 if ((p->x = getmp(x)) == 0 ||
432 (p->y = getmp(y)) == 0)
434 if (c) EC_IN(c, p, p);
440 static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
443 PyObject *y = 0, *z = 0, *t = 0;
450 if (!x || x == Py_None)
452 else if (ECPT_PYCHECK(x)) {
455 } else if (PyString_Check(x)) {
456 if (PyObject_AsReadBuffer(x, &q, &n))
460 if (!ec_ptparse(&qd, p))
463 } else if (c && (xx = tomp(x)) != 0) {
464 xx = F_IN(c->f, xx, xx);
465 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
466 } else if (PySequence_Check(x)) {
468 n = PySequence_Size(t); if (n < 0) goto end;
469 if (n != 2 && (n != 3 || !c))
470 TYERR("want sequence of two or three items");
471 if ((x = PySequence_GetItem(t, 0)) == 0 ||
472 (y = PySequence_GetItem(t, 1)) == 0 ||
473 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
475 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
478 TYERR("can't convert to curve point");
482 if (c) EC_IN(c, p, p);
486 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
491 static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
494 return (ecptxl_3(c, p, x, y, z));
496 return (ecptxl_2(c, p, x, y));
498 return (ecptxl_1(c, p, x));
501 static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
503 PyObject *x = 0, *y = 0, *z = 0;
505 static const char *const kwlist[] = { "x", "y", 0 };
507 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &x, &y) ||
508 ecptxl(0, &p, x, y, z))
510 return (ecpt_pywrapout(ty, &p));
512 mp_drop(p.x); mp_drop(p.y); mp_drop(p.z);
516 static PyObject *ecpt_pyint(PyObject *me)
521 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
523 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
524 else rc = mp_topylong(p.x);
530 static PyObject *ecpt_pylong(PyObject *me)
534 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
536 rc = mp_topylong(p.x);
542 static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
544 PyObject *x = 0, *y = 0, *z = 0;
546 static const char *const kwlist[] = { "x", "y", "z", 0 };
548 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", KWLIST,
550 ecptxl(ECCURVE_C(ty), &p, x, y, z))
552 return (ecpt_pywrap((PyObject *)ty, &p));
554 mp_drop(p.x); mp_drop(p.y); mp_drop(p.z);
558 static PyGetSetDef ecptnc_pygetset[] = {
559 #define GETSETNAME(op, name) epnc##op##_##name
560 GET (ix, "P.ix -> integer x coordinate of P")
561 GET (iy, "P.iy -> integer y coordinate of P")
562 GET (point, "P.point -> standalone curve point (no-op)")
567 static PyMethodDef ecptnc_pymethods[] = {
568 #define METHNAME(func) epmeth_##func
569 METH (tobuf, "X.tobuf() -> BIN")
574 static PyNumberMethods ecpt_pynumber = {
576 0, /* @nb_subtract@ */
577 0, /* @nb_multiply@ */
579 0, /* @nb_remainder@ */
582 0, /* @nb_negative@ */
583 0, /* @nb_positive@ */
584 0, /* @nb_absolute@ */
585 ecpt_pynonzerop, /* @nb_nonzero@ */
593 ecpt_pyint, /* @nb_int@ */
594 ecpt_pylong, /* @nb_long@ */
599 0, /* @nb_inplace_add@ */
600 0, /* @nb_inplace_subtract@ */
601 0, /* @nb_inplace_multiply@ */
602 0, /* @nb_inplace_divide@ */
603 0, /* @nb_inplace_remainder@ */
604 0, /* @nb_inplace_power@ */
605 0, /* @nb_inplace_lshift@ */
606 0, /* @nb_inplace_rshift@ */
607 0, /* @nb_inplace_and@ */
608 0, /* @nb_inplace_xor@ */
609 0, /* @nb_inplace_or@ */
611 0, /* @nb_floor_divide@ */
612 0, /* @nb_true_divide@ */
613 0, /* @nb_inplace_floor_divide@ */
614 0, /* @nb_inplace_true_divide@ */
617 static PyTypeObject ecpt_pytype_skel = {
618 PyObject_HEAD_INIT(0) 0, /* Header */
619 "ECPt", /* @tp_name@ */
620 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
621 0, /* @tp_itemsize@ */
623 ecpt_pydealloc, /* @tp_dealloc@ */
625 0, /* @tp_getattr@ */
626 0, /* @tp_setattr@ */
627 0, /* @tp_compare@ */
629 &ecpt_pynumber, /* @tp_as_number@ */
630 0, /* @tp_as_sequence@ */
631 0, /* @tp_as_mapping@ */
632 ecpt_pyhash, /* @tp_hash@ */
635 0, /* @tp_getattro@ */
636 0, /* @tp_setattro@ */
637 0, /* @tp_as_buffer@ */
638 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
639 Py_TPFLAGS_CHECKTYPES |
643 "ECPt([X, [Y]]): elliptic curve points, not associated with any curve.\n\
644 X alone may be None, an existing point, a string 'X, Y', an\n\
645 x-coordinate, or a pair (X, Y); X and Y should be a coordinate pair.",
647 0, /* @tp_traverse@ */
649 ecpt_pyrichcompare, /* @tp_richcompare@ */
650 0, /* @tp_weaklistoffset@ */
652 0, /* @tp_iternext@ */
653 ecptnc_pymethods, /* @tp_methods@ */
654 0, /* @tp_members@ */
655 ecptnc_pygetset, /* @tp_getset@ */
658 0, /* @tp_descr_get@ */
659 0, /* @tp_descr_set@ */
660 0, /* @tp_dictoffset@ */
662 PyType_GenericAlloc, /* @tp_alloc@ */
663 ecptnc_pynew, /* @tp_new@ */
668 static PyGetSetDef ecpt_pygetset[] = {
669 #define GETSETNAME(op, name) ep##op##_##name
670 GET (curve, "P.curve -> elliptic curve containing P")
671 GET (point, "P.point -> standalone curve point")
672 GET (x, "P.x -> Cartesian x coordinate of P")
673 GET (y, "P.y -> Cartesian y coordinate of P")
674 GET (_x, "P._x -> internal x coordinate of P")
675 GET (_y, "P._y -> internal y coordinate of P")
676 GET (_z, "P._z -> internal z coordinate of P, or None")
681 static PyMethodDef ecpt_pymethods[] = {
682 #define METHNAME(func) epmeth_##func
683 METH (toraw, "X.toraw() -> BIN")
684 KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
685 METH (dbl, "X.dbl() -> X + X")
686 METH (oncurvep, "X.oncurvep() -> BOOL")
691 static PyNumberMethods ecptcurve_pynumber = {
692 ecpt_pyadd, /* @nb_add@ */
693 ecpt_pysub, /* @nb_subtract@ */
694 ecpt_pymul, /* @nb_multiply@ */
696 0, /* @nb_remainder@ */
699 ecpt_pyneg, /* @nb_negative@ */
700 ecpt_pyid, /* @nb_positive@ */
701 0, /* @nb_absolute@ */
702 0, /* @nb_nonzero@ */
716 0, /* @nb_inplace_add@ */
717 0, /* @nb_inplace_subtract@ */
718 0, /* @nb_inplace_multiply@ */
719 0, /* @nb_inplace_divide@ */
720 0, /* @nb_inplace_remainder@ */
721 0, /* @nb_inplace_power@ */
722 0, /* @nb_inplace_lshift@ */
723 0, /* @nb_inplace_rshift@ */
724 0, /* @nb_inplace_and@ */
725 0, /* @nb_inplace_xor@ */
726 0, /* @nb_inplace_or@ */
728 0, /* @nb_floor_divide@ */
729 0, /* @nb_true_divide@ */
730 0, /* @nb_inplace_floor_divide@ */
731 0, /* @nb_inplace_true_divide@ */
734 static PyTypeObject ecptcurve_pytype_skel = {
735 PyObject_HEAD_INIT(0) 0, /* Header */
736 "ECPtCurve", /* @tp_name@ */
737 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
738 0, /* @tp_itemsize@ */
740 ecpt_pydealloc, /* @tp_dealloc@ */
742 0, /* @tp_getattr@ */
743 0, /* @tp_setattr@ */
744 0, /* @tp_compare@ */
746 &ecptcurve_pynumber, /* @tp_as_number@ */
747 0, /* @tp_as_sequence@ */
748 0, /* @tp_as_mapping@ */
752 0, /* @tp_getattro@ */
753 0, /* @tp_setattro@ */
754 0, /* @tp_as_buffer@ */
755 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
756 Py_TPFLAGS_CHECKTYPES |
760 "Elliptic curve points; abstract base class for points on given curves.",
762 0, /* @tp_traverse@ */
764 0, /* @tp_richcompare@ */
765 0, /* @tp_weaklistoffset@ */
767 0, /* @tp_iternext@ */
768 ecpt_pymethods, /* @tp_methods@ */
769 0, /* @tp_members@ */
770 ecpt_pygetset, /* @tp_getset@ */
773 0, /* @tp_descr_get@ */
774 0, /* @tp_descr_set@ */
775 0, /* @tp_dictoffset@ */
777 PyType_GenericAlloc, /* @tp_alloc@ */
778 abstract_pynew, /* @tp_new@ */
783 /*----- Elliptic curves themselves ----------------------------------------*/
785 static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
789 assert(ECCURVE_PYCHECK(x));
790 if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
791 b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
794 case Py_NE: b = !b; break;
795 default: TYERR("can't order elliptic curves");
802 static PyObject *ecmmul_id(PyObject *me)
803 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
805 static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
807 ec_mulfactor *f = pp;
810 if (getecpt(ECCURVE_C(me), &f->base, x) ||
811 (f->exp = getmp(m)) == 0)
816 static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
819 ec_immul(ECCURVE_C(me), &p, pp, n);
820 return (ecpt_pywrap(me, &p));
823 static void ecmmul_drop(void *pp)
825 ec_mulfactor *f = pp;
826 EC_DESTROY(&f->base);
830 static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
832 return (mexp_common(me, arg, sizeof(ec_mulfactor),
833 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
836 static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
845 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
847 buf_init(&b, p, len);
849 if (ec_getraw(cc, &b, &pp))
852 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
857 static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
858 PyObject *arg, PyObject *kw)
865 unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
867 static const char *const kwlist[] = { "class", "buf", "flags", 0 };
869 if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|O&:os2ecp", KWLIST,
870 &me, &p, &len, convuint, &f))
872 buf_init(&b, p, len);
874 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
876 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
881 static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
889 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
891 if (buf_getec(&b, &pp)) VALERR("malformed data");
892 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
893 bytestring_pywrapbuf(&b));
898 static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
905 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
908 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
909 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
914 static void eccurve_pydealloc(PyObject *me)
916 ec_destroycurve(ECCURVE_C(me));
917 Py_DECREF(ECCURVE_FOBJ(me));
918 PyType_Type.tp_dealloc(me);
921 static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
928 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
929 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
930 xx = MP_COPY(FE_X(x));
931 else if ((xx = getmp(x)) == 0)
934 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
935 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
936 VALERR("not on the curve");
937 rc = ecpt_pywrap(me, &p);
943 static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
945 static const char *const kwlist[] = { "rng", 0 };
946 grand *r = &rand_global;
949 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", KWLIST,
952 ec_rand(ECCURVE_C(me), &p, r);
953 EC_IN(ECCURVE_C(me), &p, &p);
954 return (ecpt_pywrap(me, &p));
957 static PyObject *eccurve_dopywrap(PyTypeObject *ty,
958 PyObject *fobj, ec_curve *c)
960 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
963 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
964 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
965 Py_INCREF(ecptcurve_pytype);
966 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
967 Py_TPFLAGS_BASETYPE |
968 Py_TPFLAGS_CHECKTYPES |
969 Py_TPFLAGS_HEAPTYPE);
970 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
971 cobj->ty.ht_type.tp_free = 0;
972 cobj->ty.ht_type.tp_new = ecpt_pynew;
973 typeready(&cobj->ty.ht_type);
974 return ((PyObject *)cobj);
977 PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
982 fobj = field_pywrap(c->f);
985 assert(FIELD_F(fobj) == c->f);
986 if (STRCMP(EC_NAME(c), ==, "prime"))
987 ty = ecprimecurve_pytype;
988 else if (STRCMP(EC_NAME(c), ==, "primeproj"))
989 ty = ecprimeprojcurve_pytype;
990 else if (STRCMP(EC_NAME(c), ==, "bin"))
991 ty = ecbincurve_pytype;
992 else if (STRCMP(EC_NAME(c), ==, "binproj"))
993 ty = ecbinprojcurve_pytype;
996 return (eccurve_dopywrap(ty, fobj, c));
999 static PyObject *eccurve_pynew(PyTypeObject *ty,
1000 ec_curve *(*make)(field *, mp *, mp *),
1001 PyObject *arg, PyObject *kw)
1005 static const char *const kwlist[] = { "field", "a", "b", 0 };
1006 mp *aa = 0, *bb = 0;
1008 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", KWLIST,
1009 field_pytype, &fobj,
1010 convmp, &aa, convmp, &bb))
1013 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1015 if (aa) MP_DROP(aa);
1016 if (bb) MP_DROP(bb);
1020 static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
1027 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1031 if ((c = ec_curveparse(&qd)) == 0)
1033 rc = eccurve_pywrap(0, c);
1038 static PyObject *ecget_name(PyObject *me, void *hunoz)
1039 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1041 static PyObject *ecget_a(PyObject *me, void *hunoz)
1042 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1044 static PyObject *ecget_b(PyObject *me, void *hunoz)
1045 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1047 static PyObject *ecget_field(PyObject *me, void *hunoz)
1048 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1050 static PyObject *ecget_inf(PyObject *me, void *hunoz)
1051 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1053 static PyGetSetDef eccurve_pygetset[] = {
1054 #define GETSETNAME(op, name) ec##op##_##name
1055 GET (name, "E.name -> name of this kind of curve")
1056 GET (a, "E.a -> first parameter of curve")
1057 GET (b, "E.b -> second parameter of curve")
1058 GET (field, "E.field -> finite field containing this curve")
1059 GET (inf, "E.inf -> point at infinity of this curve")
1064 static PyMethodDef eccurve_pymethods[] = {
1065 #define METHNAME(name) ecmeth_##name
1067 E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1068 METH (find, "E.find(X) -> P")
1069 KWMETH(rand, "E.rand([rng = rand]) -> P")
1074 static PyTypeObject eccurve_pytype_skel = {
1075 PyObject_HEAD_INIT(0) 0, /* Header */
1076 "ECCurve", /* @tp_name@ */
1077 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1078 0, /* @tp_itemsize@ */
1080 eccurve_pydealloc, /* @tp_dealloc@ */
1082 0, /* @tp_getattr@ */
1083 0, /* @tp_setattr@ */
1084 0, /* @tp_compare@ */
1086 0, /* @tp_as_number@ */
1087 0, /* @tp_as_sequence@ */
1088 0, /* @tp_as_mapping@ */
1092 0, /* @tp_getattro@ */
1093 0, /* @tp_setattro@ */
1094 0, /* @tp_as_buffer@ */
1095 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1096 Py_TPFLAGS_BASETYPE,
1099 "An elliptic curve. Abstract class.",
1101 0, /* @tp_traverse@ */
1103 eccurve_pyrichcompare, /* @tp_richcompare@ */
1104 0, /* @tp_weaklistoffset@ */
1106 0, /* @tp_iternext@ */
1107 eccurve_pymethods, /* @tp_methods@ */
1108 0, /* @tp_members@ */
1109 eccurve_pygetset, /* @tp_getset@ */
1112 0, /* @tp_descr_get@ */
1113 0, /* @tp_descr_set@ */
1114 0, /* @tp_dictoffset@ */
1116 PyType_GenericAlloc, /* @tp_alloc@ */
1117 abstract_pynew, /* @tp_new@ */
1122 static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1123 PyObject *arg, PyObject *kw)
1125 return (eccurve_pynew(ty, ec_prime, arg, kw));
1128 static PyTypeObject ecprimecurve_pytype_skel = {
1129 PyObject_HEAD_INIT(0) 0, /* Header */
1130 "ECPrimeCurve", /* @tp_name@ */
1131 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1132 0, /* @tp_itemsize@ */
1134 eccurve_pydealloc, /* @tp_dealloc@ */
1136 0, /* @tp_getattr@ */
1137 0, /* @tp_setattr@ */
1138 0, /* @tp_compare@ */
1140 0, /* @tp_as_number@ */
1141 0, /* @tp_as_sequence@ */
1142 0, /* @tp_as_mapping@ */
1146 0, /* @tp_getattro@ */
1147 0, /* @tp_setattro@ */
1148 0, /* @tp_as_buffer@ */
1149 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1150 Py_TPFLAGS_BASETYPE,
1153 "ECPrimeCurve(FIELD, A, B): an elliptic curve over a prime field.\n\
1154 Use ECPrimeProjCurve instead.",
1156 0, /* @tp_traverse@ */
1158 eccurve_pyrichcompare, /* @tp_richcompare@ */
1159 0, /* @tp_weaklistoffset@ */
1161 0, /* @tp_iternext@ */
1162 0, /* @tp_methods@ */
1163 0, /* @tp_members@ */
1164 0, /* @tp_getset@ */
1167 0, /* @tp_descr_get@ */
1168 0, /* @tp_descr_set@ */
1169 0, /* @tp_dictoffset@ */
1171 PyType_GenericAlloc, /* @tp_alloc@ */
1172 ecprimecurve_pynew, /* @tp_new@ */
1177 static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1178 PyObject *arg, PyObject *kw)
1180 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1183 static PyTypeObject ecprimeprojcurve_pytype_skel = {
1184 PyObject_HEAD_INIT(0) 0, /* Header */
1185 "ECPrimeProjCurve", /* @tp_name@ */
1186 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1187 0, /* @tp_itemsize@ */
1189 eccurve_pydealloc, /* @tp_dealloc@ */
1191 0, /* @tp_getattr@ */
1192 0, /* @tp_setattr@ */
1193 0, /* @tp_compare@ */
1195 0, /* @tp_as_number@ */
1196 0, /* @tp_as_sequence@ */
1197 0, /* @tp_as_mapping@ */
1201 0, /* @tp_getattro@ */
1202 0, /* @tp_setattro@ */
1203 0, /* @tp_as_buffer@ */
1204 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1205 Py_TPFLAGS_BASETYPE,
1208 "ECPrimeProjCurve(FIELD, A, B): an elliptic curve over a prime field\n\
1209 using projective coordinates.",
1211 0, /* @tp_traverse@ */
1213 eccurve_pyrichcompare, /* @tp_richcompare@ */
1214 0, /* @tp_weaklistoffset@ */
1216 0, /* @tp_iternext@ */
1217 0, /* @tp_methods@ */
1218 0, /* @tp_members@ */
1219 0, /* @tp_getset@ */
1222 0, /* @tp_descr_get@ */
1223 0, /* @tp_descr_set@ */
1224 0, /* @tp_dictoffset@ */
1226 PyType_GenericAlloc, /* @tp_alloc@ */
1227 ecprimeprojcurve_pynew, /* @tp_new@ */
1232 static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1233 PyObject *arg, PyObject *kw)
1235 return (eccurve_pynew(ty, ec_bin, arg, kw));
1238 static PyTypeObject ecbincurve_pytype_skel = {
1239 PyObject_HEAD_INIT(0) 0, /* Header */
1240 "ECBinCurve", /* @tp_name@ */
1241 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1242 0, /* @tp_itemsize@ */
1244 eccurve_pydealloc, /* @tp_dealloc@ */
1246 0, /* @tp_getattr@ */
1247 0, /* @tp_setattr@ */
1248 0, /* @tp_compare@ */
1250 0, /* @tp_as_number@ */
1251 0, /* @tp_as_sequence@ */
1252 0, /* @tp_as_mapping@ */
1256 0, /* @tp_getattro@ */
1257 0, /* @tp_setattro@ */
1258 0, /* @tp_as_buffer@ */
1259 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1260 Py_TPFLAGS_BASETYPE,
1263 "ECBinCurve(FIELD, A, B): an elliptic curve over a binary field.\n\
1264 Use ECBinProjCurve instead.",
1266 0, /* @tp_traverse@ */
1268 eccurve_pyrichcompare, /* @tp_richcompare@ */
1269 0, /* @tp_weaklistoffset@ */
1271 0, /* @tp_iternext@ */
1272 0, /* @tp_methods@ */
1273 0, /* @tp_members@ */
1274 0, /* @tp_getset@ */
1277 0, /* @tp_descr_get@ */
1278 0, /* @tp_descr_set@ */
1279 0, /* @tp_dictoffset@ */
1281 PyType_GenericAlloc, /* @tp_alloc@ */
1282 ecbincurve_pynew, /* @tp_new@ */
1287 static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1288 PyObject *arg, PyObject *kw)
1290 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1293 static PyTypeObject ecbinprojcurve_pytype_skel = {
1294 PyObject_HEAD_INIT(0) 0, /* Header */
1295 "ECBinProjCurve", /* @tp_name@ */
1296 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1297 0, /* @tp_itemsize@ */
1299 eccurve_pydealloc, /* @tp_dealloc@ */
1301 0, /* @tp_getattr@ */
1302 0, /* @tp_setattr@ */
1303 0, /* @tp_compare@ */
1305 0, /* @tp_as_number@ */
1306 0, /* @tp_as_sequence@ */
1307 0, /* @tp_as_mapping@ */
1311 0, /* @tp_getattro@ */
1312 0, /* @tp_setattro@ */
1313 0, /* @tp_as_buffer@ */
1314 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1315 Py_TPFLAGS_BASETYPE,
1318 "ECBinProjCurve(FIELD, A, B): an elliptic curve over a binary field,\n\
1319 using projective coordinates.",
1321 0, /* @tp_traverse@ */
1323 eccurve_pyrichcompare, /* @tp_richcompare@ */
1324 0, /* @tp_weaklistoffset@ */
1326 0, /* @tp_iternext@ */
1327 0, /* @tp_methods@ */
1328 0, /* @tp_members@ */
1329 0, /* @tp_getset@ */
1332 0, /* @tp_descr_get@ */
1333 0, /* @tp_descr_set@ */
1334 0, /* @tp_dictoffset@ */
1336 PyType_GenericAlloc, /* @tp_alloc@ */
1337 ecbinprojcurve_pynew, /* @tp_new@ */
1342 /*----- Curve info --------------------------------------------------------*/
1344 static int ncurves = -1;
1346 void ecinfo_copy(ec_info *eic, const ec_info *ei)
1348 eic->c = eccurve_copy(ei->c);
1350 EC_COPY(&eic->g, &ei->g);
1351 eic->r = MP_COPY(ei->r);
1352 eic->h = MP_COPY(ei->h);
1355 PyObject *ecinfo_pywrap(ec_info *ei)
1359 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1361 o->cobj = eccurve_pywrap(0, o->ei.c);
1363 return ((PyObject *)o);
1366 static void ecinfo_pydealloc(PyObject *me)
1368 ec_info *ei = ECINFO_EI(me);
1372 Py_DECREF(ECINFO_COBJ(me));
1376 static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1380 static const char *const kwlist[] = { "curve", "G", "r", "h", 0 };
1381 ecinfo_pyobj *rc = 0;
1383 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", KWLIST,
1384 eccurve_pytype, &e, ecpt_pytype, &g,
1385 convmp, &ei.r, convmp, &ei.h))
1387 if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e)))
1388 TYERR("point not from this curve");
1389 ei.c = ECCURVE_C(e);
1391 EC_OUT(ei.c, &ei.g, ECPT_P(g));
1392 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1395 Py_INCREF(rc->cobj);
1396 return ((PyObject *)rc);
1404 static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
1411 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1415 if (ec_infoparse(&qd, &ei))
1417 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1422 static PyObject *meth__ECInfo__curven(PyObject *me, PyObject *arg)
1428 if (!PyArg_ParseTuple(arg, "Oi:_curven", &me, &i)) goto end;
1429 if (i < 0 || i >= ncurves) VALERR("curve index out of range");
1430 ec_infofromdata(&ei, ectab[i].data);
1431 rc = ecinfo_pywrap(&ei);
1436 static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1438 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1442 default: TYERR("can't order elliptic curve infos");
1444 return (getbool(b));
1449 static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1451 static const char *const kwlist[] = { "rng", 0 };
1452 grand *r = &rand_global;
1455 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", KWLIST,
1458 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1465 static PyObject *eiget_curve(PyObject *me, void *hunoz)
1466 { RETURN_OBJ(ECINFO_COBJ(me)); }
1468 static PyObject *eiget_G(PyObject *me, void *hunoz)
1470 ec_info *ei = ECINFO_EI(me);
1472 EC_IN(ei->c, &p, &ei->g);
1473 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1476 static PyObject *eiget_r(PyObject *me, void *hunoz)
1477 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1479 static PyObject *eiget_h(PyObject *me, void *hunoz)
1480 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1482 static PyGetSetDef ecinfo_pygetset[] = {
1483 #define GETSETNAME(op, name) ei##op##_##name
1484 GET (curve, "I.curve -> the elliptic curve")
1485 GET (G, "I.G -> generator point for the group")
1486 GET (r, "I.r -> order of the group (and hence of G")
1487 GET (h, "I.h -> cofactor of the group")
1492 static PyMethodDef ecinfo_pymethods[] = {
1493 #define METHNAME(name) eimeth_##name
1494 KWMETH(check, "I.check([rng = rand]) -> None")
1499 static PyTypeObject ecinfo_pytype_skel = {
1500 PyObject_HEAD_INIT(0) 0, /* Header */
1501 "ECInfo", /* @tp_name@ */
1502 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1503 0, /* @tp_itemsize@ */
1505 ecinfo_pydealloc, /* @tp_dealloc@ */
1507 0, /* @tp_getattr@ */
1508 0, /* @tp_setattr@ */
1509 0, /* @tp_compare@ */
1511 0, /* @tp_as_number@ */
1512 0, /* @tp_as_sequence@ */
1513 0, /* @tp_as_mapping@ */
1517 0, /* @tp_getattro@ */
1518 0, /* @tp_setattro@ */
1519 0, /* @tp_as_buffer@ */
1520 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1521 Py_TPFLAGS_BASETYPE,
1524 "ECInfo(CURVE, G, R, H): elliptic curve domain parameters.",
1526 0, /* @tp_traverse@ */
1528 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1529 0, /* @tp_weaklistoffset@ */
1531 0, /* @tp_iternext@ */
1532 ecinfo_pymethods, /* @tp_methods@ */
1533 0, /* @tp_members@ */
1534 ecinfo_pygetset, /* @tp_getset@ */
1537 0, /* @tp_descr_get@ */
1538 0, /* @tp_descr_set@ */
1539 0, /* @tp_dictoffset@ */
1541 PyType_GenericAlloc, /* @tp_alloc@ */
1542 ecinfo_pynew, /* @tp_new@ */
1547 /*----- Setup -------------------------------------------------------------*/
1549 static PyMethodDef methods[] = {
1550 #define METHNAME(func) meth_##func
1551 METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
1552 METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
1553 KWMETH(_ECPtCurve_os2ecp, "os2ecp(E, STR, [flags = ...]) -> (P, REST)")
1554 METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
1555 METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
1556 METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
1557 METH (_ECInfo__curven, "_curven(N) -> I")
1562 void ec_pyinit(void)
1564 INITTYPE(ecpt, root);
1565 INITTYPE(ecptcurve, ecpt);
1566 INITTYPE(eccurve, type);
1567 INITTYPE(ecprimecurve, eccurve);
1568 INITTYPE(ecprimeprojcurve, ecprimecurve);
1569 INITTYPE(ecbincurve, eccurve);
1570 INITTYPE(ecbinprojcurve, ecbincurve);
1571 INITTYPE(ecinfo, root);
1572 addmethods(methods);
1575 static PyObject *namedcurves(void)
1582 for (i = 0; ectab[i].name; i++) {
1584 for (j = 0; j < i; j++) {
1585 if (ectab[i].data == ectab[j].data) {
1586 c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name);
1591 c = PyInt_FromLong(i);
1593 PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
1600 void ec_pyinsert(PyObject *mod)
1602 INSERT("ECPt", ecpt_pytype);
1603 INSERT("ECPtCurve", ecptcurve_pytype);
1604 INSERT("ECCurve", eccurve_pytype);
1605 INSERT("ECPrimeCurve", ecprimecurve_pytype);
1606 INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype);
1607 INSERT("ECBinCurve", ecbincurve_pytype);
1608 INSERT("ECBinProjCurve", ecbinprojcurve_pytype);
1609 INSERT("ECInfo", ecinfo_pytype);
1610 INSERT("_eccurves", namedcurves());
1613 /*----- That's all, folks -------------------------------------------------*/