chiark / gitweb /
~mdw / catacomb-python / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
debian: Drop support for Python 2.3.
[catacomb-python] / ec.c
CommitLineData
d7ab1bab 1/* -*-c-*-
2 *
3 * $Id$
4 *
5 * Elliptic curves
6 *
7 * (c) 2004 Straylight/Edgeware
8 */
9
b2687a0a 10/*----- Licensing notice --------------------------------------------------*
d7ab1bab 11 *
12 * This file is part of the Python interface to Catacomb.
13 *
14 * Catacomb/Python 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.
b2687a0a 18 *
d7ab1bab 19 * Catacomb/Python 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.
b2687a0a 23 *
d7ab1bab 24 * You should have received a copy of the GNU General Public License
25 * along with Catacomb/Python; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 */
28
29/*----- Header files ------------------------------------------------------*/
30
31#include "catacomb-python.h"
32
33/*----- Utility functions -------------------------------------------------*/
34
35PyTypeObject *ecpt_pytype;
36PyTypeObject *ecptcurve_pytype;
37PyTypeObject *eccurve_pytype;
38PyTypeObject *ecprimecurve_pytype;
39PyTypeObject *ecprimeprojcurve_pytype;
40PyTypeObject *ecbincurve_pytype;
41PyTypeObject *ecbinprojcurve_pytype;
42PyTypeObject *ecinfo_pytype;
43
44ec_curve *eccurve_copy(ec_curve *c)
45{
46 field *f;
47 mp *a, *b;
48
49 if ((f = field_copy(c->f)) == 0)
50 return (0);
51 a = F_OUT(f, MP_NEW, c->a);
52 b = F_OUT(f, MP_NEW, c->b);
53 if (strcmp(EC_NAME(c), "prime") == 0)
54 c = ec_prime(f, a, b);
55 else if (strcmp(EC_NAME(c), "primeproj") == 0)
56 c = ec_primeproj(f, a, b);
57 else if (strcmp(EC_NAME(c), "bin") == 0)
58 c = ec_bin(f, a, b);
59 else if (strcmp(EC_NAME(c), "binproj") == 0)
60 c = ec_binproj(f, a, b);
61 else
62 c = 0;
63 MP_DROP(a);
64 MP_DROP(b);
65 if (!c) F_DESTROY(f);
66 return (c);
67}
68
69static PyObject *ecpt_dopywrap(PyObject *cobj, ec_curve *c, ec *p)
70{
71 ecpt_pyobj *z = PyObject_New(ecpt_pyobj, (PyTypeObject *)cobj);
72 z->p = *p;
73 z->c = c;
74 Py_INCREF(cobj);
75 return ((PyObject *)z);
76}
77
78PyObject *ecpt_pywrap(PyObject *cobj, ec *p)
79 { return (ecpt_dopywrap(cobj, ECCURVE_C(cobj), p)); }
80
81PyObject *ecpt_pywrapout(void *cobj, ec *p)
82{
83 ec_curve *c;
84
85 if (!PyType_IsSubtype(cobj, ecptcurve_pytype))
86 c = 0;
87 else {
88 c = ECCURVE_C(cobj);
89 EC_IN(ECCURVE_C(cobj), p, p);
90 }
91 return (ecpt_dopywrap(cobj, c, p));
92}
93
94int toecpt(ec_curve *c, ec *d, PyObject *p)
95{
96 if (ECPTCURVE_PYCHECK(p)) {
97 if (ECPT_C(p) != c && !ec_samep(ECPT_C(p), c))
98 return (-1);
99 EC_COPY(d, ECPT_P(p));
100 } else if (ECPT_PYCHECK(p))
101 EC_IN(c, d, ECPT_P(p));
102 else
103 return (-1);
104 return (0);
105}
106
107int getecpt(ec_curve *c, ec *d, PyObject *p)
108{
109 if (toecpt(c, d, p)) {
110 PyErr_Format(PyExc_TypeError, "can't convert %.100s to ecpt",
111 p->ob_type->tp_name);
112 return (-1);
113 }
114 return (0);
115}
116
117void getecptout(ec *d, PyObject *p)
118{
119 if (ECPTCURVE_PYCHECK(p))
120 EC_OUT(ECPT_C(p), d, ECPT_P(p));
121 else {
122 assert(ECPT_PYCHECK(p));
123 EC_COPY(d, ECPT_P(p));
124 }
125}
126
127int convecpt(PyObject *o, void *p)
128{
129 if (!ECPT_PYCHECK(o))
130 TYERR("want elliptic curve point");
131 getecptout(p, o);
132 return (1);
133end:
134 return (0);
135}
136
137/*----- Curve points ------------------------------------------------------*/
138
139static int ecbinop(PyObject *x, PyObject *y,
140 ec_curve **c, PyObject **cobj, ec *xx, ec *yy)
141{
142 if (ECPTCURVE_PYCHECK(x)) *cobj = ECPT_COBJ(x);
143 else if (ECPTCURVE_PYCHECK(y)) *cobj = ECPT_COBJ(y);
144 else return (-1);
145 *c = ECCURVE_C(*cobj);
146 if (toecpt(*c, xx, x) || toecpt(*c, yy, y)) return (-1);
147 return (0);
148}
149
150#define BINOP(name) \
151 static PyObject *ecpt_py##name(PyObject *x, PyObject *y) { \
152 ec xx = EC_INIT, yy = EC_INIT, zz = EC_INIT; \
153 PyObject *cobj; \
154 ec_curve *c; \
155 if (ecbinop(x, y, &c, &cobj, &xx, &yy)) RETURN_NOTIMPL; \
156 c->ops->name(c, &zz, &xx, &yy); \
157 EC_DESTROY(&xx); EC_DESTROY(&yy); \
158 return (ecpt_pywrap(ECPT_COBJ(x), &zz)); \
159 }
160BINOP(add)
161BINOP(sub)
162#undef BINOP
163
164#define UNOP(name) \
165 static PyObject *ecpt_py##name(PyObject *x) { \
166 ec zz = EC_INIT; \
167 ec_curve *c = ECPT_C(x); \
168 c->ops->name(c, &zz, ECPT_P(x)); \
169 return (ecpt_pywrap(ECPT_COBJ(x), &zz)); \
170 }
171UNOP(neg)
172#undef UNOP
173
174static PyObject *ecpt_pyid(PyObject *x) { RETURN_OBJ(x); }
175
176static int ecpt_pynonzerop(PyObject *x) { return (!EC_ATINF(ECPT_P(x))); }
177
178static void ecpt_pydealloc(PyObject *x)
179{
180 EC_DESTROY(ECPT_P(x));
181 Py_DECREF(ECPT_COBJ(x));
3aa33042 182 FREEOBJ(x);
d7ab1bab 183}
184
185static PyObject *ecpt_pymul(PyObject *x, PyObject *y)
186{
187 mp *xx;
188 ec zz = EC_INIT;
189
190 if (ECPT_PYCHECK(x)) { PyObject *t; t = x; x = y; y = t; }
191 if (!ECPT_PYCHECK(y) || (xx = tomp(x)) == 0) RETURN_NOTIMPL;
192 ec_imul(ECPT_C(y), &zz, ECPT_P(y), xx);
193 return (ecpt_pywrap(ECPT_COBJ(y), &zz));
194}
195
196static long ecpt_pyhash(PyObject *me)
197{
198 long i;
199 ec p = EC_INIT;
200
201 EC_OUT(ECPT_C(me), &p, ECPT_P(me));
202 i = 0xe0fdd039; /* random perturbance */
203 if (p.x) i ^= mp_tolong(p.x);
204 if (p.y) i ^= mp_tolong(p.y);
205 if (i == -1) i = -2;
206 EC_DESTROY(&p);
207 return (i);
208}
209
210static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
211{
212 ec_curve *c;
213 PyObject *cobj;
214 ec p = EC_INIT, q = EC_INIT;
215 int b;
216 PyObject *rc = 0;
217
218 if (ecbinop(x, y, &c, &cobj, &p, &q)) RETURN_NOTIMPL;
219 EC_OUT(c, &p, &p);
220 EC_OUT(c, &q, &q);
221 switch (op) {
222 case Py_EQ: b = EC_EQ(&p, &q); break;
223 case Py_NE: b = !EC_EQ(&p, &q); break;
224 default: TYERR("elliptic curve points are unordered");
225 }
226 rc = getbool(b);
227end:
228 EC_DESTROY(&p);
229 EC_DESTROY(&q);
230 return (rc);
231}
232
233static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
234{
235 if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
49915b4a
MW		 236 return (getbool(EC_ATINF(ECPT_P(me)) ||
237 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
d7ab1bab 238}
239
240static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
241{
242 ec p = EC_INIT;
243 if (!PyArg_ParseTuple(arg, ":dbl")) return (0);
244 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
245 return (ecpt_pywrap(ECPT_COBJ(me), &p));
246}
247
248static PyObject *epmeth_tobuf(PyObject *me, PyObject *arg)
249{
250 buf b;
251 ec p = EC_INIT;
252 PyObject *rc;
253 size_t n;
254
255 if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
256 getecptout(&p, me);
257 if (EC_ATINF(&p))
258 n = 2;
259 else
260 n = mp_octets(p.x) + mp_octets(p.y) + 4;
261 rc = bytestring_pywrap(0, n);
262 buf_init(&b, PyString_AS_STRING(rc), n);
263 buf_putec(&b, &p);
264 assert(BOK(&b));
265 _PyString_Resize(&rc, BLEN(&b));
266 EC_DESTROY(&p);
267 return (rc);
268}
269
270static PyObject *epmeth_toraw(PyObject *me, PyObject *arg)
271{
272 buf b;
273 PyObject *rc;
274 char *p;
275 ec_curve *c = ECPT_C(me);
276 ec pp = EC_INIT;
277 int len;
278
279 if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
280 len = c->f->noctets * 2 + 1;
281 rc = bytestring_pywrap(0, len);
282 p = PyString_AS_STRING(rc);
283 buf_init(&b, p, len);
284 EC_OUT(c, &pp, ECPT_P(me));
285 ec_putraw(c, &b, &pp);
286 EC_DESTROY(&pp);
287 _PyString_Resize(&rc, BLEN(&b));
288 return (rc);
289}
290
291static PyObject *epget_curve(PyObject *me, void *hunoz)
292 { RETURN_OBJ(ECPT_COBJ(me)); }
293
294static PyObject *epncget_ix(PyObject *me, void *hunoz)
295{
296 ec p = EC_INIT;
297 PyObject *rc;
298 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
299 getecptout(&p, me);
300 rc = mp_pywrap(MP_COPY(p.x));
301 EC_DESTROY(&p);
302 return (rc);
303}
304
305static PyObject *epncget_iy(PyObject *me, void *hunoz)
306{
307 ec p = EC_INIT;
308 PyObject *rc;
309 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
310 getecptout(&p, me);
311 rc = mp_pywrap(MP_COPY(p.y));
312 EC_DESTROY(&p);
313 return (rc);
314}
315
316static PyObject *epncget_point(PyObject *me, void *hunoz)
317 { RETURN_ME; }
318
319static PyObject *epget_point(PyObject *me, void *hunoz)
320{
321 ec p = EC_INIT;
322 getecptout(&p, me);
323 return (ecpt_pywrapout(ecpt_pytype, &p));
324}
325
326static PyObject *epget_x(PyObject *me, void *hunoz)
327{
328 ec_curve *c = ECPT_C(me);
329 ec *pp = ECPT_P(me);
330 PyObject *fobj = ECPT_FOBJ(me);
331 ec p = EC_INIT;
332 PyObject *rc;
333
334 if (EC_ATINF(pp)) RETURN_NONE;
335 EC_OUT(c, &p, pp);
336 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
337 EC_DESTROY(&p);
338 return (rc);
339}
340
341static PyObject *epget_y(PyObject *me, void *hunoz)
342{
343 ec_curve *c = ECPT_C(me);
344 ec *pp = ECPT_P(me);
345 PyObject *fobj = ECPT_FOBJ(me);
346 ec p = EC_INIT;
347 PyObject *rc;
348
349 if (EC_ATINF(pp)) RETURN_NONE;
350 EC_OUT(c, &p, pp);
351 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
352 EC_DESTROY(&p);
353 return (rc);
354}
355
356static PyObject *epget__x(PyObject *me, void *hunoz)
357{
358 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
359 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
360}
361
362static PyObject *epget__y(PyObject *me, void *hunoz)
363{
364 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
365 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
366}
367
368static PyObject *epget__z(PyObject *me, void *hunoz)
369{
370 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
371 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
372}
373
374static mp *coord_in(field *f, PyObject *x)
375{
376 mp *xx;
377 if (FE_PYCHECK(x) && FE_F(x) == f)
378 return (MP_COPY(FE_X(x)));
379 else if ((xx = getmp(x)) == 0)
380 return (0);
381 else
382 return (F_IN(f, xx, xx));
383}
384
385static int ecptxl_3(ec_curve *c, ec *p,
386 PyObject *x, PyObject *y, PyObject *z)
387{
388 int rc = -1;
389
390 if (!x || !y || !z) TYERR("missing argument");
391 if (!c) VALERR("internal form with no curve!");
392 if ((p->x == coord_in(c->f, x)) == 0 ||
393 (p->y == coord_in(c->f, y)) == 0 ||
394 (z != Py_None && (p->z = coord_in(c->f, z))) == 0)
395 goto end;
396 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
397 rc = 0;
398end:
399 return (rc);
400}
401
402static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
403{
404 int rc = -1;
405
406 if (!x || !y) TYERR("missing argument");
407 if ((p->x = getmp(x)) == 0 ||
408 (p->y = getmp(y)) == 0)
409 goto end;
410 if (c) EC_IN(c, p, p);
411 rc = 0;
412end:
413 return (rc);
414}
415
416static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
417{
418 int rc = -1;
419 PyObject *y = 0, *z = 0, *t = 0;
420 mp *xx = 0;
421 const void *q;
422 int n;
423 qd_parse qd;
424
425 Py_XINCREF(x);
426 if (!x || x == Py_None)
427 /*cool*/;
428 else if (ECPT_PYCHECK(x)) {
429 getecptout(p, x);
430 goto fix;
431 } else if (PyString_Check(x)) {
432 if (PyObject_AsReadBuffer(x, &q, 0))
433 goto end;
434 qd.p = q;
435 qd.e = 0;
436 if (!ec_ptparse(&qd, p))
437 SYNERR(qd.e);
438 goto fix;
439 } else if (c && (xx = tomp(x)) != 0) {
440 xx = F_IN(c->f, xx, xx);
441 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
442 } else if (PySequence_Check(x)) {
443 t = x; x = 0;
444 n = PySequence_Size(t);
445 if (n != 2 && (n != 3 || !c))
446 TYERR("want sequence of two or three items");
447 if ((x = PySequence_GetItem(t, 0)) == 0 ||
448 (y = PySequence_GetItem(t, 1)) == 0 ||
449 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
450 goto end;
451 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
452 } else
453 TYERR("can't convert to curve point");
454 goto ok;
455
456fix:
457 if (c) EC_IN(c, p, p);
458ok:
459 rc = 0;
460end:
461 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
462 mp_drop(xx);
463 return (rc);
464}
465
466static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
467{
468 if (z)
469 return (ecptxl_3(c, p, x, y, z));
470 else if (y)
471 return (ecptxl_2(c, p, x, y));
472 else
473 return (ecptxl_1(c, p, x));
474}
475
d7ab1bab 476static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
477{
478 PyObject *x = 0, *y = 0, *z = 0;
479 ec p = EC_INIT;
480 char *kwlist[] = { "x", "y", 0 };
481
482 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", kwlist, &x, &y) ||
483 ecptxl(0, &p, x, y, z))
484 goto end;
485 return (ecpt_pywrapout(ty, &p));
486end:
487 EC_DESTROY(&p);
488 return (0);
489}
490
491static PyObject *ecpt_pyint(PyObject *me)
492{
493 ec p = EC_INIT;
494 long l;
495 PyObject *rc = 0;
496 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
497 getecptout(&p, me);
498 if (mp_tolong_checked(p.x, &l)) goto end;
499 rc = PyInt_FromLong(l);
500end:
501 EC_DESTROY(&p);
502 return (rc);
503}
504
505static PyObject *ecpt_pylong(PyObject *me)
506{
507 ec p = EC_INIT;
508 PyObject *rc = 0;
509 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
510 getecptout(&p, me);
f368b46e 511 rc = mp_topylong(p.x);
d7ab1bab 512end:
513 EC_DESTROY(&p);
514 return (rc);
515}
516
517static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
518{
519 PyObject *x = 0, *y = 0, *z = 0;
520 ec p = EC_INIT;
521 char *kwlist[] = { "x", "y", "z", 0 };
522
523 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", kwlist,
524 &x, &y, &z) ||
525 ecptxl(ECCURVE_C(ty), &p, x, y, z))
526 goto end;
527 return (ecpt_pywrap((PyObject *)ty, &p));
528end:
529 EC_DESTROY(&p);
530 return (0);
531}
532
533static PyGetSetDef ecptnc_pygetset[] = {
534#define GETSETNAME(op, name) epnc##op##_##name
535 GET (ix, "P.ix -> integer x coordinate of P")
536 GET (iy, "P.iy -> integer y coordinate of P")
537 GET (point, "P.point -> standalone curve point (no-op)")
538#undef GETSETNAME
539 { 0 }
540};
541
542static PyMethodDef ecptnc_pymethods[] = {
543#define METHNAME(func) epmeth_##func
544 METH (tobuf, "X.tobuf() -> BIN")
545#undef METHNAME
546 { 0 }
547};
548
549static PyNumberMethods ecpt_pynumber = {
550 0, /* @nb_add@ */
551 0, /* @nb_subtract@ */
552 0, /* @nb_multiply@ */
553 0, /* @nb_divide@ */
554 0, /* @nb_remainder@ */
555 0, /* @nb_divmod@ */
556 0, /* @nb_power@ */
557 0, /* @nb_negative@ */
558 0, /* @nb_positive@ */
559 0, /* @nb_absolute@ */
560 ecpt_pynonzerop, /* @nb_nonzero@ */
561 0, /* @nb_invert@ */
562 0, /* @nb_lshift@ */
563 0, /* @nb_rshift@ */
564 0, /* @nb_and@ */
565 0, /* @nb_xor@ */
566 0, /* @nb_or@ */
567 0, /* @nb_coerce@ */
568 ecpt_pyint, /* @nb_int@ */
569 ecpt_pylong, /* @nb_long@ */
570 0, /* @nb_float@ */
571 0, /* @nb_oct@ */
572 0, /* @nb_hex@ */
573
574 0, /* @nb_inplace_add@ */
575 0, /* @nb_inplace_subtract@ */
576 0, /* @nb_inplace_multiply@ */
577 0, /* @nb_inplace_divide@ */
578 0, /* @nb_inplace_remainder@ */
579 0, /* @nb_inplace_power@ */
580 0, /* @nb_inplace_lshift@ */
581 0, /* @nb_inplace_rshift@ */
582 0, /* @nb_inplace_and@ */
583 0, /* @nb_inplace_xor@ */
584 0, /* @nb_inplace_or@ */
585
586 0, /* @nb_floor_divide@ */
587 0, /* @nb_true_divide@ */
588 0, /* @nb_inplace_floor_divide@ */
589 0, /* @nb_inplace_true_divide@ */
590};
591
592static PyTypeObject ecpt_pytype_skel = {
6d4db0bf 593 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 594 "catacomb.ECPt", /* @tp_name@ */
595 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
596 0, /* @tp_itemsize@ */
597
598 ecpt_pydealloc, /* @tp_dealloc@ */
599 0, /* @tp_print@ */
600 0, /* @tp_getattr@ */
601 0, /* @tp_setattr@ */
602 0, /* @tp_compare@ */
603 0, /* @tp_repr@ */
604 &ecpt_pynumber, /* @tp_as_number@ */
605 0, /* @tp_as_sequence@ */
606 0, /* @tp_as_mapping@ */
607 ecpt_pyhash, /* @tp_hash@ */
608 0, /* @tp_call@ */
609 0, /* @tp_str@ */
610 0, /* @tp_getattro@ */
611 0, /* @tp_setattro@ */
612 0, /* @tp_as_buffer@ */
613 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
614 Py_TPFLAGS_CHECKTYPES |
615 Py_TPFLAGS_BASETYPE,
616
617 /* @tp_doc@ */
618"Elliptic curve points, not associated with any curve.",
619
620 0, /* @tp_traverse@ */
621 0, /* @tp_clear@ */
622 ecpt_pyrichcompare, /* @tp_richcompare@ */
623 0, /* @tp_weaklistoffset@ */
624 0, /* @tp_iter@ */
963a6148 625 0, /* @tp_iternext@ */
d7ab1bab 626 ecptnc_pymethods, /* @tp_methods@ */
627 0, /* @tp_members@ */
628 ecptnc_pygetset, /* @tp_getset@ */
629 0, /* @tp_base@ */
630 0, /* @tp_dict@ */
631 0, /* @tp_descr_get@ */
632 0, /* @tp_descr_set@ */
633 0, /* @tp_dictoffset@ */
634 0, /* @tp_init@ */
635 PyType_GenericAlloc, /* @tp_alloc@ */
636 ecptnc_pynew, /* @tp_new@ */
3aa33042 637 0, /* @tp_free@ */
d7ab1bab 638 0 /* @tp_is_gc@ */
639};
640
641static PyGetSetDef ecpt_pygetset[] = {
642#define GETSETNAME(op, name) ep##op##_##name
643 GET (curve, "P.curve -> elliptic curve containing P")
644 GET (point, "P.point -> standalone curve point")
645 GET (x, "P.x -> Cartesian x coordinate of P")
646 GET (y, "P.y -> Cartesian y coordinate of P")
647 GET (_x, "P._x -> internal x coordinate of P")
648 GET (_y, "P._y -> internal y coordinate of P")
649 GET (_z, "P._z -> internal z coordinate of P, or None")
650#undef GETSETNAME
651 { 0 }
652};
653
654static PyMethodDef ecpt_pymethods[] = {
655#define METHNAME(func) epmeth_##func
656 METH (toraw, "X.toraw() -> BIN")
657 METH (dbl, "X.dbl() -> X + X")
3aa33042 658 METH (oncurvep, "X.oncurvep() -> BOOL")
d7ab1bab 659#undef METHNAME
660 { 0 }
661};
662
663static PyNumberMethods ecptcurve_pynumber = {
664 ecpt_pyadd, /* @nb_add@ */
665 ecpt_pysub, /* @nb_subtract@ */
666 ecpt_pymul, /* @nb_multiply@ */
667 0, /* @nb_divide@ */
668 0, /* @nb_remainder@ */
669 0, /* @nb_divmod@ */
670 0, /* @nb_power@ */
671 ecpt_pyneg, /* @nb_negative@ */
672 ecpt_pyid, /* @nb_positive@ */
673 0, /* @nb_absolute@ */
674 0, /* @nb_nonzero@ */
675 0, /* @nb_invert@ */
676 0, /* @nb_lshift@ */
677 0, /* @nb_rshift@ */
678 0, /* @nb_and@ */
679 0, /* @nb_xor@ */
680 0, /* @nb_or@ */
681 0, /* @nb_coerce@ */
682 0, /* @nb_int@ */
683 0, /* @nb_long@ */
684 0, /* @nb_float@ */
685 0, /* @nb_oct@ */
686 0, /* @nb_hex@ */
687
688 0, /* @nb_inplace_add@ */
689 0, /* @nb_inplace_subtract@ */
690 0, /* @nb_inplace_multiply@ */
691 0, /* @nb_inplace_divide@ */
692 0, /* @nb_inplace_remainder@ */
693 0, /* @nb_inplace_power@ */
694 0, /* @nb_inplace_lshift@ */
695 0, /* @nb_inplace_rshift@ */
696 0, /* @nb_inplace_and@ */
697 0, /* @nb_inplace_xor@ */
698 0, /* @nb_inplace_or@ */
699
700 0, /* @nb_floor_divide@ */
701 0, /* @nb_true_divide@ */
702 0, /* @nb_inplace_floor_divide@ */
703 0, /* @nb_inplace_true_divide@ */
704};
705
706static PyTypeObject ecptcurve_pytype_skel = {
6d4db0bf 707 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 708 "catacomb.ECPtCurve", /* @tp_name@ */
709 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
710 0, /* @tp_itemsize@ */
711
712 ecpt_pydealloc, /* @tp_dealloc@ */
713 0, /* @tp_print@ */
714 0, /* @tp_getattr@ */
715 0, /* @tp_setattr@ */
716 0, /* @tp_compare@ */
717 0, /* @tp_repr@ */
718 &ecptcurve_pynumber, /* @tp_as_number@ */
719 0, /* @tp_as_sequence@ */
720 0, /* @tp_as_mapping@ */
721 0, /* @tp_hash@ */
722 0, /* @tp_call@ */
723 0, /* @tp_str@ */
724 0, /* @tp_getattro@ */
725 0, /* @tp_setattro@ */
726 0, /* @tp_as_buffer@ */
727 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
728 Py_TPFLAGS_CHECKTYPES |
729 Py_TPFLAGS_BASETYPE,
730
731 /* @tp_doc@ */
732"Elliptic curve points; abstract base class for points on given curves.",
733
734 0, /* @tp_traverse@ */
735 0, /* @tp_clear@ */
736 0, /* @tp_richcompare@ */
737 0, /* @tp_weaklistoffset@ */
738 0, /* @tp_iter@ */
963a6148 739 0, /* @tp_iternext@ */
d7ab1bab 740 ecpt_pymethods, /* @tp_methods@ */
741 0, /* @tp_members@ */
742 ecpt_pygetset, /* @tp_getset@ */
743 0, /* @tp_base@ */
744 0, /* @tp_dict@ */
745 0, /* @tp_descr_get@ */
746 0, /* @tp_descr_set@ */
747 0, /* @tp_dictoffset@ */
748 0, /* @tp_init@ */
749 PyType_GenericAlloc, /* @tp_alloc@ */
750 abstract_pynew, /* @tp_new@ */
3aa33042 751 0, /* @tp_free@ */
d7ab1bab 752 0 /* @tp_is_gc@ */
753};
754
755/*----- Elliptic curves themselves ----------------------------------------*/
756
757static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
758{
759 int b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
760 switch (op) {
761 case Py_EQ: break;
762 case Py_NE: b = !b;
763 default: TYERR("can't order elliptic curves");
764 }
765 return (getbool(b));
766end:
767 return (0);
768}
769
770static PyObject *ecmmul_id(PyObject *me)
771 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
772
773static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
774{
775 ec_mulfactor *f = pp;
776
777 if (getecpt(ECCURVE_C(me), &f->base, x) ||
778 (f->exp = getmp(m)) == 0)
779 return (-1);
780 f->base = *ECPT_P(x);
781 return (0);
782}
783
784static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
785{
786 ec p = EC_INIT;
787 ec_immul(ECCURVE_C(me), &p, pp, n);
788 return (ecpt_pywrap(me, &p));
789}
790
791static void ecmmul_drop(void *pp)
792{
793 ec_mulfactor *f = pp;
794 EC_DESTROY(&f->base);
795 MP_DROP(f->exp);
796}
797
798static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
799{
800 return (mexp_common(me, arg, sizeof(ec_mulfactor),
801 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
802}
803
804static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
805{
806 char *p;
807 int len;
808 buf b;
809 PyObject *rc = 0;
810 ec_curve *cc;
811 ec pp = EC_INIT;
812
813 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
814 return (0);
815 buf_init(&b, p, len);
816 cc = ECCURVE_C(me);
817 if (ec_getraw(cc, &b, &pp))
818 SYNERR("bad point");
819 EC_IN(cc, &pp, &pp);
820 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
821end:
822 return (rc);
823}
824
825static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
826{
827 buf b;
828 char *p;
829 int sz;
830 PyObject *rc = 0;
831 ec pp = EC_INIT;
832
833 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
834 buf_init(&b, p, sz);
835 if (buf_getec(&b, &pp)) VALERR("malformed data");
836 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
837 bytestring_pywrapbuf(&b));
838end:
839 return (rc);
840}
841
842static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
843{
844 char *p;
845 qd_parse qd;
846 PyObject *rc = 0;
847 ec pp = EC_INIT;
848
849 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
850 qd.p = p;
851 qd.e = 0;
852 if (!ec_ptparse(&qd, &pp)) SYNERR(qd.e);
853 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
854end:
855 return (rc);
856}
857
858static void eccurve_pydealloc(PyObject *me)
859{
860 ec_destroycurve(ECCURVE_C(me));
861 Py_DECREF(ECCURVE_FOBJ(me));
862 PyType_Type.tp_dealloc(me);
863}
864
865static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
866{
867 PyObject *x;
868 mp *xx = 0;
869 ec p = EC_INIT;
870 PyObject *rc = 0;
871
872 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
873 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
874 xx = MP_COPY(FE_X(x));
875 else if ((xx = getmp(x)) == 0)
876 goto end;
877 else
878 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
879 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
880 VALERR("not on the curve");
881 rc = ecpt_pywrap(me, &p);
882end:
883 if (xx) MP_DROP(xx);
884 return (rc);
885}
886
887static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
888{
889 char *kwlist[] = { "rng", 0 };
890 grand *r = &rand_global;
891 ec p = EC_INIT;
892
893 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", kwlist,
894 convgrand, &r))
895 return (0);
896 ec_rand(ECCURVE_C(me), &p, r);
897 EC_IN(ECCURVE_C(me), &p, &p);
898 return (ecpt_pywrap(me, &p));
899}
900
901static PyObject *eccurve_dopywrap(PyTypeObject *ty,
902 PyObject *fobj, ec_curve *c)
903{
df9f8366 904 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 905 cobj->c = c;
906 cobj->fobj = fobj;
24b3d57b
MW		 907 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
908 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 909 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 910 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
911 Py_TPFLAGS_BASETYPE |
912 Py_TPFLAGS_CHECKTYPES |
913 Py_TPFLAGS_HEAPTYPE);
914 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
915 cobj->ty.ht_type.tp_free = 0;
916 cobj->ty.ht_type.tp_new = ecpt_pynew;
917 PyType_Ready(&cobj->ty.ht_type);
d7ab1bab 918 return ((PyObject *)cobj);
919}
920
921PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
922{
923 PyTypeObject *ty;
924
925 if (!fobj)
926 fobj = field_pywrap(c->f);
927 else
928 Py_INCREF(fobj);
929 assert(FIELD_F(fobj) == c->f);
930 if (strcmp(EC_NAME(c), "prime") == 0)
931 ty = ecprimecurve_pytype;
932 else if (strcmp(EC_NAME(c), "primeproj") == 0)
933 ty = ecprimeprojcurve_pytype;
934 else if (strcmp(EC_NAME(c), "bin") == 0)
935 ty = ecbincurve_pytype;
936 else if (strcmp(EC_NAME(c), "binproj") == 0)
937 ty = ecbinprojcurve_pytype;
938 else
939 abort();
940 return (eccurve_dopywrap(ty, fobj, c));
941}
942
943static PyObject *eccurve_pynew(PyTypeObject *ty,
944 ec_curve *(*make)(field *, mp *, mp *),
945 PyObject *arg, PyObject *kw)
946{
947 PyObject *fobj;
948 PyObject *cobj = 0;
949 char *kwlist[] = { "field", "a", "b", 0 };
950 mp *aa = 0, *bb = 0;
951
5f959e50 952 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", kwlist,
d7ab1bab 953 field_pytype, &fobj,
954 convmp, &aa, convmp, &bb))
955 goto end;
956 Py_INCREF(fobj);
957 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
958end:
959 if (aa) MP_DROP(aa);
960 if (bb) MP_DROP(bb);
961 return (cobj);
962}
963
964static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
965{
966 char *p;
967 qd_parse qd;
968 ec_curve *c;
969 PyObject *rc = 0;
970
46e6ad89 971 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
d7ab1bab 972 goto end;
973 qd.p = p;
974 qd.e = 0;
975 if ((c = ec_curveparse(&qd)) == 0)
976 SYNERR(qd.e);
977 rc = eccurve_pywrap(0, c);
978end:
979 return (rc);
980}
981
982static PyObject *ecget_name(PyObject *me, void *hunoz)
983 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
984
985static PyObject *ecget_a(PyObject *me, void *hunoz)
986 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
987
b2687a0a 988static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 989 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
990
991static PyObject *ecget_field(PyObject *me, void *hunoz)
992 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
993
994static PyObject *ecget_inf(PyObject *me, void *hunoz)
995 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
996
997static PyGetSetDef eccurve_pygetset[] = {
998#define GETSETNAME(op, name) ec##op##_##name
999 GET (name, "E.name -> name of this kind of curve")
1000 GET (a, "E.a -> first parameter of curve")
1001 GET (b, "E.b -> second parameter of curve")
1002 GET (field, "E.field -> finite field containing this curve")
1003 GET (inf, "E.inf -> point at infinity of this curve")
1004#undef GETSETNAME
1005 { 0 }
b2687a0a 1006};
d7ab1bab 1007
1008static PyMethodDef eccurve_pymethods[] = {
1009#define METHNAME(name) ecmeth_##name
1010 METH (mmul, "\
1011E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1012 METH (find, "E.find(X) -> P")
1013 KWMETH(rand, "E.rand(rng = rand) ->P")
1014#undef METHNAME
1015 { 0 }
1016};
1017
1018static PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1019 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1020 "catacomb.ECCurve", /* @tp_name@ */
1021 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1022 0, /* @tp_itemsize@ */
1023
1024 eccurve_pydealloc, /* @tp_dealloc@ */
1025 0, /* @tp_print@ */
1026 0, /* @tp_getattr@ */
1027 0, /* @tp_setattr@ */
1028 0, /* @tp_compare@ */
1029 0, /* @tp_repr@ */
1030 0, /* @tp_as_number@ */
1031 0, /* @tp_as_sequence@ */
1032 0, /* @tp_as_mapping@ */
1033 0, /* @tp_hash@ */
1034 0, /* @tp_call@ */
1035 0, /* @tp_str@ */
1036 0, /* @tp_getattro@ */
1037 0, /* @tp_setattro@ */
1038 0, /* @tp_as_buffer@ */
1039 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1040 Py_TPFLAGS_BASETYPE,
1041
1042 /* @tp_doc@ */
1043 "An elliptic curve. Abstract class.",
1044
1045 0, /* @tp_traverse@ */
1046 0, /* @tp_clear@ */
1047 eccurve_pyrichcompare, /* @tp_richcompare@ */
1048 0, /* @tp_weaklistoffset@ */
1049 0, /* @tp_iter@ */
963a6148 1050 0, /* @tp_iternext@ */
d7ab1bab 1051 eccurve_pymethods, /* @tp_methods@ */
1052 0, /* @tp_members@ */
1053 eccurve_pygetset, /* @tp_getset@ */
1054 0, /* @tp_base@ */
1055 0, /* @tp_dict@ */
1056 0, /* @tp_descr_get@ */
1057 0, /* @tp_descr_set@ */
1058 0, /* @tp_dictoffset@ */
1059 0, /* @tp_init@ */
1060 PyType_GenericAlloc, /* @tp_alloc@ */
1061 abstract_pynew, /* @tp_new@ */
3aa33042 1062 0, /* @tp_free@ */
d7ab1bab 1063 0 /* @tp_is_gc@ */
1064};
1065
1066static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1067 PyObject *arg, PyObject *kw)
1068{
1069 return (eccurve_pynew(ty, ec_prime, arg, kw));
1070}
1071
1072static PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1073 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1074 "catacomb.ECPrimeCurve", /* @tp_name@ */
1075 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1076 0, /* @tp_itemsize@ */
1077
1078 eccurve_pydealloc, /* @tp_dealloc@ */
1079 0, /* @tp_print@ */
1080 0, /* @tp_getattr@ */
1081 0, /* @tp_setattr@ */
1082 0, /* @tp_compare@ */
1083 0, /* @tp_repr@ */
1084 0, /* @tp_as_number@ */
1085 0, /* @tp_as_sequence@ */
1086 0, /* @tp_as_mapping@ */
1087 0, /* @tp_hash@ */
1088 0, /* @tp_call@ */
1089 0, /* @tp_str@ */
1090 0, /* @tp_getattro@ */
1091 0, /* @tp_setattro@ */
1092 0, /* @tp_as_buffer@ */
1093 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1094 Py_TPFLAGS_BASETYPE,
1095
1096 /* @tp_doc@ */
1097 "An elliptic curve over a prime field. Use ecprimeprojcurve.",
1098
1099 0, /* @tp_traverse@ */
1100 0, /* @tp_clear@ */
1101 eccurve_pyrichcompare, /* @tp_richcompare@ */
1102 0, /* @tp_weaklistoffset@ */
1103 0, /* @tp_iter@ */
963a6148 1104 0, /* @tp_iternext@ */
d7ab1bab 1105 0, /* @tp_methods@ */
1106 0, /* @tp_members@ */
1107 0, /* @tp_getset@ */
1108 0, /* @tp_base@ */
1109 0, /* @tp_dict@ */
1110 0, /* @tp_descr_get@ */
1111 0, /* @tp_descr_set@ */
1112 0, /* @tp_dictoffset@ */
1113 0, /* @tp_init@ */
1114 PyType_GenericAlloc, /* @tp_alloc@ */
1115 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1116 0, /* @tp_free@ */
d7ab1bab 1117 0 /* @tp_is_gc@ */
1118};
1119
1120static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1121 PyObject *arg, PyObject *kw)
1122{
1123 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1124}
1125
1126static PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1127 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1128 "catacomb.ECPrimeProjCurve", /* @tp_name@ */
1129 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1130 0, /* @tp_itemsize@ */
1131
1132 eccurve_pydealloc, /* @tp_dealloc@ */
1133 0, /* @tp_print@ */
1134 0, /* @tp_getattr@ */
1135 0, /* @tp_setattr@ */
1136 0, /* @tp_compare@ */
1137 0, /* @tp_repr@ */
1138 0, /* @tp_as_number@ */
1139 0, /* @tp_as_sequence@ */
1140 0, /* @tp_as_mapping@ */
1141 0, /* @tp_hash@ */
1142 0, /* @tp_call@ */
1143 0, /* @tp_str@ */
1144 0, /* @tp_getattro@ */
1145 0, /* @tp_setattro@ */
1146 0, /* @tp_as_buffer@ */
1147 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1148 Py_TPFLAGS_BASETYPE,
1149
1150 /* @tp_doc@ */
1151 "An elliptic curve over a prime field, using projective coordinates.",
1152
1153 0, /* @tp_traverse@ */
1154 0, /* @tp_clear@ */
1155 eccurve_pyrichcompare, /* @tp_richcompare@ */
1156 0, /* @tp_weaklistoffset@ */
1157 0, /* @tp_iter@ */
963a6148 1158 0, /* @tp_iternext@ */
d7ab1bab 1159 0, /* @tp_methods@ */
1160 0, /* @tp_members@ */
1161 0, /* @tp_getset@ */
1162 0, /* @tp_base@ */
1163 0, /* @tp_dict@ */
1164 0, /* @tp_descr_get@ */
1165 0, /* @tp_descr_set@ */
1166 0, /* @tp_dictoffset@ */
1167 0, /* @tp_init@ */
1168 PyType_GenericAlloc, /* @tp_alloc@ */
1169 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1170 0, /* @tp_free@ */
d7ab1bab 1171 0 /* @tp_is_gc@ */
1172};
1173
1174static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1175 PyObject *arg, PyObject *kw)
1176{
1177 return (eccurve_pynew(ty, ec_bin, arg, kw));
1178}
1179
1180static PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1181 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1182 "catacomb.ECBinCurve", /* @tp_name@ */
1183 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1184 0, /* @tp_itemsize@ */
1185
1186 eccurve_pydealloc, /* @tp_dealloc@ */
1187 0, /* @tp_print@ */
1188 0, /* @tp_getattr@ */
1189 0, /* @tp_setattr@ */
1190 0, /* @tp_compare@ */
1191 0, /* @tp_repr@ */
1192 0, /* @tp_as_number@ */
1193 0, /* @tp_as_sequence@ */
1194 0, /* @tp_as_mapping@ */
1195 0, /* @tp_hash@ */
1196 0, /* @tp_call@ */
1197 0, /* @tp_str@ */
1198 0, /* @tp_getattro@ */
1199 0, /* @tp_setattro@ */
1200 0, /* @tp_as_buffer@ */
1201 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1202 Py_TPFLAGS_BASETYPE,
1203
1204 /* @tp_doc@ */
1205 "An elliptic curve over a binary field. Use ecbinprojcurve.",
1206
1207 0, /* @tp_traverse@ */
1208 0, /* @tp_clear@ */
1209 eccurve_pyrichcompare, /* @tp_richcompare@ */
1210 0, /* @tp_weaklistoffset@ */
1211 0, /* @tp_iter@ */
963a6148 1212 0, /* @tp_iternext@ */
d7ab1bab 1213 0, /* @tp_methods@ */
1214 0, /* @tp_members@ */
1215 0, /* @tp_getset@ */
1216 0, /* @tp_base@ */
1217 0, /* @tp_dict@ */
1218 0, /* @tp_descr_get@ */
1219 0, /* @tp_descr_set@ */
1220 0, /* @tp_dictoffset@ */
1221 0, /* @tp_init@ */
1222 PyType_GenericAlloc, /* @tp_alloc@ */
1223 ecbincurve_pynew, /* @tp_new@ */
3aa33042 1224 0, /* @tp_free@ */
d7ab1bab 1225 0 /* @tp_is_gc@ */
1226};
1227
1228static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1229 PyObject *arg, PyObject *kw)
1230{
1231 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1232}
1233
1234static PyTypeObject ecbinprojcurve_pytype_skel = {
6d4db0bf 1235 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1236 "catacomb.ECBinProjCurve", /* @tp_name@ */
1237 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1238 0, /* @tp_itemsize@ */
1239
1240 eccurve_pydealloc, /* @tp_dealloc@ */
1241 0, /* @tp_print@ */
1242 0, /* @tp_getattr@ */
1243 0, /* @tp_setattr@ */
1244 0, /* @tp_compare@ */
1245 0, /* @tp_repr@ */
1246 0, /* @tp_as_number@ */
1247 0, /* @tp_as_sequence@ */
1248 0, /* @tp_as_mapping@ */
1249 0, /* @tp_hash@ */
1250 0, /* @tp_call@ */
1251 0, /* @tp_str@ */
1252 0, /* @tp_getattro@ */
1253 0, /* @tp_setattro@ */
1254 0, /* @tp_as_buffer@ */
1255 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1256 Py_TPFLAGS_BASETYPE,
1257
1258 /* @tp_doc@ */
1259 "An elliptic curve over a binary field, using projective coordinates.",
1260
1261 0, /* @tp_traverse@ */
1262 0, /* @tp_clear@ */
1263 eccurve_pyrichcompare, /* @tp_richcompare@ */
1264 0, /* @tp_weaklistoffset@ */
1265 0, /* @tp_iter@ */
963a6148 1266 0, /* @tp_iternext@ */
d7ab1bab 1267 0, /* @tp_methods@ */
1268 0, /* @tp_members@ */
1269 0, /* @tp_getset@ */
1270 0, /* @tp_base@ */
1271 0, /* @tp_dict@ */
1272 0, /* @tp_descr_get@ */
1273 0, /* @tp_descr_set@ */
1274 0, /* @tp_dictoffset@ */
1275 0, /* @tp_init@ */
1276 PyType_GenericAlloc, /* @tp_alloc@ */
1277 ecbinprojcurve_pynew, /* @tp_new@ */
3aa33042 1278 0, /* @tp_free@ */
d7ab1bab 1279 0 /* @tp_is_gc@ */
1280};
1281
1282/*----- Curve info --------------------------------------------------------*/
1283
1284static int ncurves = -1;
1285
1286void ecinfo_copy(ec_info *eic, const ec_info *ei)
1287{
1288 eic->c = eccurve_copy(ei->c);
1289 EC_CREATE(&eic->g);
1290 EC_COPY(&eic->g, &ei->g);
1291 eic->r = MP_COPY(ei->r);
1292 eic->h = MP_COPY(ei->h);
1293}
1294
1295PyObject *ecinfo_pywrap(ec_info *ei)
1296{
1297 ecinfo_pyobj *o;
1298
1299 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1300 o->ei = *ei;
1301 o->cobj = eccurve_pywrap(0, o->ei.c);
1302 Py_INCREF(o->cobj);
1303 return ((PyObject *)o);
1304}
1305
1306static void ecinfo_pydealloc(PyObject *me)
1307{
1308 ec_info *ei = ECINFO_EI(me);
1309 EC_DESTROY(&ei->g);
1310 MP_DROP(ei->r);
1311 MP_DROP(ei->h);
1312 Py_DECREF(ECINFO_COBJ(me));
3aa33042 1313 FREEOBJ(me);
d7ab1bab 1314}
1315
1316static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1317{
1318 ec_info ei = { 0 };
1319 PyObject *e, *g;
1320 char *kwlist[] = { "curve", "G", "r", "h", 0 };
1321 ecinfo_pyobj *rc = 0;
1322
1323 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", kwlist,
1324 eccurve_pytype, &e, ecpt_pytype, &g,
1325 convmp, &ei.r, convmp, &ei.h))
1326 goto end;
1327 if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e)))
1328 TYERR("point not from this curve");
1329 ei.c = ECCURVE_C(e);
1330 EC_CREATE(&ei.g);
30720615 1331 EC_OUT(ei.c, &ei.g, ECPT_P(g));
d7ab1bab 1332 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1333 rc->ei = ei;
1334 rc->cobj = e;
1335 Py_INCREF(rc->cobj);
1336 return ((PyObject *)rc);
1337
1338end:
1339 mp_drop(ei.r);
1340 mp_drop(ei.h);
1341 return (0);
1342}
1343
1344static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
1345{
1346 char *p;
1347 qd_parse qd;
1348 ec_info ei;
1349 PyObject *rc = 0;
1350
1351 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1352 goto end;
1353 qd.p = p;
1354 qd.e = 0;
1355 if (ec_infoparse(&qd, &ei))
1356 SYNERR(qd.e);
1357 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1358end:
1359 return (rc);
1360}
1361
1362static PyObject *meth__ECInfo__curven(PyObject *me, PyObject *arg)
1363{
1364 int i;
1365 ec_info ei;
1366 PyObject *rc = 0;
1367
1368 if (!PyArg_ParseTuple(arg, "Oi:_curven", &me, &i)) goto end;
1369 if (i < 0 || i >= ncurves) VALERR("curve index out of range");
1370 ec_infofromdata(&ei, ectab[i].data);
1371 rc = ecinfo_pywrap(&ei);
1372end:
1373 return (rc);
1374}
1375
1376static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1377{
1378 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1379 switch (op) {
1380 case Py_EQ: break;
1381 case Py_NE: b = !b;
1382 default: TYERR("can't order elliptic curve infos");
1383 }
1384 return (getbool(b));
1385end:
1386 return (0);
1387}
1388
1389static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1390{
1391 char *kwlist[] = { "rng", 0 };
1392 grand *r = &rand_global;
1393 const char *p;
1394
1395 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", kwlist,
1396 convgrand, &r))
1397 goto end;
1398 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1399 VALERR(p);
1400 RETURN_ME;
1401end:
1402 return (0);
1403}
1404
1405static PyObject *eiget_curve(PyObject *me, void *hunoz)
1406 { RETURN_OBJ(ECINFO_COBJ(me)); }
1407
1408static PyObject *eiget_G(PyObject *me, void *hunoz)
1409{
1410 ec_info *ei = ECINFO_EI(me);
1411 ec p = EC_INIT;
1412 EC_IN(ei->c, &p, &ei->g);
1413 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1414}
1415
1416static PyObject *eiget_r(PyObject *me, void *hunoz)
1417 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1418
1419static PyObject *eiget_h(PyObject *me, void *hunoz)
1420 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1421
1422static PyGetSetDef ecinfo_pygetset[] = {
1423#define GETSETNAME(op, name) ei##op##_##name
1424 GET (curve, "I.curve -> the elliptic curve")
1425 GET (G, "I.G -> generator point for the group")
1426 GET (r, "I.r -> order of the group (and hence of G")
1427 GET (h, "I.h -> cofactor of the group")
1428#undef GETSETNAME
1429 { 0 }
1430};
1431
1432static PyMethodDef ecinfo_pymethods[] = {
1433#define METHNAME(name) eimeth_##name
1434 KWMETH(check, "I.check() -> None")
1435#undef METHNAME
1436 { 0 }
1437};
1438
1439static PyTypeObject ecinfo_pytype_skel = {
6d4db0bf 1440 PyObject_HEAD_INIT(0) 0, /* Header */
d7ab1bab 1441 "catacomb.ECInfo", /* @tp_name@ */
1442 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1443 0, /* @tp_itemsize@ */
1444
1445 ecinfo_pydealloc, /* @tp_dealloc@ */
1446 0, /* @tp_print@ */
1447 0, /* @tp_getattr@ */
1448 0, /* @tp_setattr@ */
1449 0, /* @tp_compare@ */
1450 0, /* @tp_repr@ */
1451 0, /* @tp_as_number@ */
1452 0, /* @tp_as_sequence@ */
1453 0, /* @tp_as_mapping@ */
1454 0, /* @tp_hash@ */
1455 0, /* @tp_call@ */
1456 0, /* @tp_str@ */
1457 0, /* @tp_getattro@ */
1458 0, /* @tp_setattro@ */
1459 0, /* @tp_as_buffer@ */
1460 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1461 Py_TPFLAGS_BASETYPE,
1462
1463 /* @tp_doc@ */
1464 "Elliptic curve domain parameters.",
1465
1466 0, /* @tp_traverse@ */
1467 0, /* @tp_clear@ */
1468 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1469 0, /* @tp_weaklistoffset@ */
1470 0, /* @tp_iter@ */
963a6148 1471 0, /* @tp_iternext@ */
d7ab1bab 1472 ecinfo_pymethods, /* @tp_methods@ */
1473 0, /* @tp_members@ */
1474 ecinfo_pygetset, /* @tp_getset@ */
1475 0, /* @tp_base@ */
1476 0, /* @tp_dict@ */
1477 0, /* @tp_descr_get@ */
1478 0, /* @tp_descr_set@ */
1479 0, /* @tp_dictoffset@ */
1480 0, /* @tp_init@ */
1481 PyType_GenericAlloc, /* @tp_alloc@ */
1482 ecinfo_pynew, /* @tp_new@ */
3aa33042 1483 0, /* @tp_free@ */
d7ab1bab 1484 0 /* @tp_is_gc@ */
1485};
1486
1487/*----- Setup -------------------------------------------------------------*/
1488
1489static PyMethodDef methods[] = {
1490#define METHNAME(func) meth_##func
b2687a0a
MW		 1491 METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
1492 METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
1493 METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
1494 METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
1495 METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
1496 METH (_ECInfo__curven, "_curven(N) -> I")
d7ab1bab 1497#undef METHNAME
1498 { 0 }
1499};
1500
1501void ec_pyinit(void)
1502{
1503 INITTYPE(ecpt, root);
1504 INITTYPE(ecptcurve, ecpt);
1505 INITTYPE(eccurve, type);
1506 INITTYPE(ecprimecurve, eccurve);
1507 INITTYPE(ecprimeprojcurve, ecprimecurve);
1508 INITTYPE(ecbincurve, eccurve);
1509 INITTYPE(ecbinprojcurve, ecbincurve);
1510 INITTYPE(ecinfo, root);
1511 addmethods(methods);
1512}
1513
1514static PyObject *namedcurves(void)
1515{
1516 int i, j;
1517 const char *p;
1518 PyObject *d, *c;
1519
1520 d = PyDict_New();
1521 for (i = 0; ectab[i].name; i++) {
1522 p = ectab[i].name;
1523 for (j = 0; j < i; j++) {
1524 if (ectab[i].data == ectab[j].data) {
1525 c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name);
1526 Py_INCREF(c);
1527 goto found;
1528 }
1529 }
1530 c = PyInt_FromLong(i);
1531 found:
1532 PyDict_SetItemString(d, (/*unconst*/ char *)ectab[i].name, c);
1533 Py_DECREF(c);
1534 }
1535 ncurves = i;
1536 return (d);
1537}
1538
1539void ec_pyinsert(PyObject *mod)
1540{
1541 INSERT("ECPt", ecpt_pytype);
1542 INSERT("ECPtCurve", ecptcurve_pytype);
1543 INSERT("ECCurve", eccurve_pytype);
1544 INSERT("ECPrimeCurve", ecprimecurve_pytype);
1545 INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype);
1546 INSERT("ECBinCurve", ecbincurve_pytype);
1547 INSERT("ECBinProjCurve", ecbinprojcurve_pytype);
1548 INSERT("ECInfo", ecinfo_pytype);
1549 INSERT("_eccurves", namedcurves());
1550}
1551
1552/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings