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[catacomb-python] / ec.c
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d7ab1bab 1/* -*-c-*-
d7ab1bab 2 *
3 * Elliptic curves
4 *
5 * (c) 2004 Straylight/Edgeware
6 */
7
b2687a0a 8/*----- Licensing notice --------------------------------------------------*
d7ab1bab 9 *
10 * This file is part of the Python interface to Catacomb.
11 *
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.
b2687a0a 16 *
d7ab1bab 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.
b2687a0a 21 *
d7ab1bab 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.
25 */
26
27/*----- Header files ------------------------------------------------------*/
28
29#include "catacomb-python.h"
30
31/*----- Utility functions -------------------------------------------------*/
32
33PyTypeObject *ecpt_pytype;
34PyTypeObject *ecptcurve_pytype;
35PyTypeObject *eccurve_pytype;
36PyTypeObject *ecprimecurve_pytype;
37PyTypeObject *ecprimeprojcurve_pytype;
38PyTypeObject *ecbincurve_pytype;
39PyTypeObject *ecbinprojcurve_pytype;
40PyTypeObject *ecinfo_pytype;
41
42ec_curve *eccurve_copy(ec_curve *c)
43{
44 field *f;
45 mp *a, *b;
46
47 if ((f = field_copy(c->f)) == 0)
48 return (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") == 0)
52 c = ec_prime(f, a, b);
53 else if (strcmp(EC_NAME(c), "primeproj") == 0)
54 c = ec_primeproj(f, a, b);
55 else if (strcmp(EC_NAME(c), "bin") == 0)
56 c = ec_bin(f, a, b);
57 else if (strcmp(EC_NAME(c), "binproj") == 0)
58 c = ec_binproj(f, a, b);
59 else
60 c = 0;
61 MP_DROP(a);
62 MP_DROP(b);
63 if (!c) F_DESTROY(f);
64 return (c);
65}
66
67static PyObject *ecpt_dopywrap(PyObject *cobj, ec_curve *c, ec *p)
68{
69 ecpt_pyobj *z = PyObject_New(ecpt_pyobj, (PyTypeObject *)cobj);
70 z->p = *p;
71 z->c = c;
72 Py_INCREF(cobj);
73 return ((PyObject *)z);
74}
75
76PyObject *ecpt_pywrap(PyObject *cobj, ec *p)
77 { return (ecpt_dopywrap(cobj, ECCURVE_C(cobj), p)); }
78
79PyObject *ecpt_pywrapout(void *cobj, ec *p)
80{
81 ec_curve *c;
82
83 if (!PyType_IsSubtype(cobj, ecptcurve_pytype))
84 c = 0;
85 else {
86 c = ECCURVE_C(cobj);
87 EC_IN(ECCURVE_C(cobj), p, p);
88 }
89 return (ecpt_dopywrap(cobj, c, p));
90}
91
92int toecpt(ec_curve *c, ec *d, PyObject *p)
93{
94 if (ECPTCURVE_PYCHECK(p)) {
95 if (ECPT_C(p) != c && !ec_samep(ECPT_C(p), c))
96 return (-1);
97 EC_COPY(d, ECPT_P(p));
98 } else if (ECPT_PYCHECK(p))
99 EC_IN(c, d, ECPT_P(p));
100 else
101 return (-1);
102 return (0);
103}
104
105int getecpt(ec_curve *c, ec *d, PyObject *p)
106{
107 if (toecpt(c, d, p)) {
108 PyErr_Format(PyExc_TypeError, "can't convert %.100s to ecpt",
109 p->ob_type->tp_name);
110 return (-1);
111 }
112 return (0);
113}
114
115void getecptout(ec *d, PyObject *p)
116{
117 if (ECPTCURVE_PYCHECK(p))
118 EC_OUT(ECPT_C(p), d, ECPT_P(p));
119 else {
120 assert(ECPT_PYCHECK(p));
121 EC_COPY(d, ECPT_P(p));
122 }
123}
124
125int convecpt(PyObject *o, void *p)
126{
127 if (!ECPT_PYCHECK(o))
128 TYERR("want elliptic curve point");
129 getecptout(p, o);
130 return (1);
131end:
132 return (0);
133}
134
135/*----- Curve points ------------------------------------------------------*/
136
137static int ecbinop(PyObject *x, PyObject *y,
138 ec_curve **c, PyObject **cobj, ec *xx, ec *yy)
139{
140 if (ECPTCURVE_PYCHECK(x)) *cobj = ECPT_COBJ(x);
141 else if (ECPTCURVE_PYCHECK(y)) *cobj = ECPT_COBJ(y);
142 else return (-1);
143 *c = ECCURVE_C(*cobj);
144 if (toecpt(*c, xx, x) || toecpt(*c, yy, y)) return (-1);
145 return (0);
146}
147
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; \
151 PyObject *cobj; \
152 ec_curve *c; \
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)); \
157 }
158BINOP(add)
159BINOP(sub)
160#undef BINOP
161
162#define UNOP(name) \
163 static PyObject *ecpt_py##name(PyObject *x) { \
164 ec zz = EC_INIT; \
165 ec_curve *c = ECPT_C(x); \
166 c->ops->name(c, &zz, ECPT_P(x)); \
167 return (ecpt_pywrap(ECPT_COBJ(x), &zz)); \
168 }
169UNOP(neg)
170#undef UNOP
171
172static PyObject *ecpt_pyid(PyObject *x) { RETURN_OBJ(x); }
173
174static int ecpt_pynonzerop(PyObject *x) { return (!EC_ATINF(ECPT_P(x))); }
175
176static void ecpt_pydealloc(PyObject *x)
177{
178 EC_DESTROY(ECPT_P(x));
179 Py_DECREF(ECPT_COBJ(x));
3aa33042 180 FREEOBJ(x);
d7ab1bab 181}
182
183static PyObject *ecpt_pymul(PyObject *x, PyObject *y)
184{
185 mp *xx;
186 ec zz = EC_INIT;
187
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);
191 return (ecpt_pywrap(ECPT_COBJ(y), &zz));
192}
193
194static long ecpt_pyhash(PyObject *me)
195{
6d481bc6
MW		 196 uint32 h;
197 buf b;
d7ab1bab 198 ec p = EC_INIT;
6d481bc6
MW		 199 size_t sz = 2*ECPT_C(me)->f->noctets + 1;
200 octet *q = xmalloc(sz);
d7ab1bab 201
6d481bc6
MW		 202 h = 0xe0fdd039 + ECPT_C(me)->f->ops->ty;
203 buf_init(&b, q, sz);
d7ab1bab 204 EC_OUT(ECPT_C(me), &p, ECPT_P(me));
6d481bc6 205 ec_putraw(ECPT_C(me), &b, &p);
d7ab1bab 206 EC_DESTROY(&p);
6d481bc6 207 h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
9acb0b54 208 xfree(q);
6d481bc6 209 return (h % LONG_MAX);
d7ab1bab 210}
211
212static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
213{
214 ec_curve *c;
215 PyObject *cobj;
216 ec p = EC_INIT, q = EC_INIT;
217 int b;
218 PyObject *rc = 0;
219
220 if (ecbinop(x, y, &c, &cobj, &p, &q)) RETURN_NOTIMPL;
221 EC_OUT(c, &p, &p);
222 EC_OUT(c, &q, &q);
223 switch (op) {
224 case Py_EQ: b = EC_EQ(&p, &q); break;
225 case Py_NE: b = !EC_EQ(&p, &q); break;
226 default: TYERR("elliptic curve points are unordered");
227 }
228 rc = getbool(b);
229end:
230 EC_DESTROY(&p);
231 EC_DESTROY(&q);
232 return (rc);
233}
234
235static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
236{
237 if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
49915b4a
MW		 238 return (getbool(EC_ATINF(ECPT_P(me)) ||
239 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
d7ab1bab 240}
241
242static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
243{
244 ec p = EC_INIT;
245 if (!PyArg_ParseTuple(arg, ":dbl")) return (0);
246 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
247 return (ecpt_pywrap(ECPT_COBJ(me), &p));
248}
249
250static PyObject *epmeth_tobuf(PyObject *me, PyObject *arg)
251{
252 buf b;
253 ec p = EC_INIT;
254 PyObject *rc;
255 size_t n;
256
257 if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
258 getecptout(&p, me);
259 if (EC_ATINF(&p))
260 n = 2;
261 else
262 n = mp_octets(p.x) + mp_octets(p.y) + 4;
263 rc = bytestring_pywrap(0, n);
264 buf_init(&b, PyString_AS_STRING(rc), n);
265 buf_putec(&b, &p);
266 assert(BOK(&b));
267 _PyString_Resize(&rc, BLEN(&b));
268 EC_DESTROY(&p);
269 return (rc);
270}
271
272static PyObject *epmeth_toraw(PyObject *me, PyObject *arg)
273{
274 buf b;
275 PyObject *rc;
276 char *p;
277 ec_curve *c = ECPT_C(me);
278 ec pp = EC_INIT;
279 int len;
280
281 if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
282 len = c->f->noctets * 2 + 1;
283 rc = bytestring_pywrap(0, len);
284 p = PyString_AS_STRING(rc);
285 buf_init(&b, p, len);
286 EC_OUT(c, &pp, ECPT_P(me));
287 ec_putraw(c, &b, &pp);
288 EC_DESTROY(&pp);
289 _PyString_Resize(&rc, BLEN(&b));
290 return (rc);
291}
292
e12df5f3
MW		 293static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
294{
295 buf b;
296 PyObject *rc;
297 char *p;
298 ec_curve *c = ECPT_C(me);
299 ec pp = EC_INIT;
300 int f = EC_EXPLY;
301 int len;
302 char *kwlist[] = { "flags", 0 };
303
304 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|i:ectosp", kwlist, &f))
305 return (0);
306 len = c->f->noctets * 2 + 1;
307 rc = bytestring_pywrap(0, len);
308 p = PyString_AS_STRING(rc);
309 buf_init(&b, p, len);
310 EC_OUT(c, &pp, ECPT_P(me));
311 if (ec_ec2osp(c, f, &b, &pp)) {
312 Py_DECREF(rc); rc = 0;
313 VALERR("invalid flags");
314 }
315 EC_DESTROY(&pp);
316 _PyString_Resize(&rc, BLEN(&b));
317end:
318 return (rc);
319}
320
d7ab1bab 321static PyObject *epget_curve(PyObject *me, void *hunoz)
322 { RETURN_OBJ(ECPT_COBJ(me)); }
323
324static PyObject *epncget_ix(PyObject *me, void *hunoz)
325{
326 ec p = EC_INIT;
327 PyObject *rc;
328 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
329 getecptout(&p, me);
330 rc = mp_pywrap(MP_COPY(p.x));
331 EC_DESTROY(&p);
332 return (rc);
333}
334
335static PyObject *epncget_iy(PyObject *me, void *hunoz)
336{
337 ec p = EC_INIT;
338 PyObject *rc;
339 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
340 getecptout(&p, me);
341 rc = mp_pywrap(MP_COPY(p.y));
342 EC_DESTROY(&p);
343 return (rc);
344}
345
346static PyObject *epncget_point(PyObject *me, void *hunoz)
347 { RETURN_ME; }
348
349static PyObject *epget_point(PyObject *me, void *hunoz)
350{
351 ec p = EC_INIT;
352 getecptout(&p, me);
353 return (ecpt_pywrapout(ecpt_pytype, &p));
354}
355
356static PyObject *epget_x(PyObject *me, void *hunoz)
357{
358 ec_curve *c = ECPT_C(me);
359 ec *pp = ECPT_P(me);
360 PyObject *fobj = ECPT_FOBJ(me);
361 ec p = EC_INIT;
362 PyObject *rc;
363
364 if (EC_ATINF(pp)) RETURN_NONE;
365 EC_OUT(c, &p, pp);
366 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
367 EC_DESTROY(&p);
368 return (rc);
369}
370
371static PyObject *epget_y(PyObject *me, void *hunoz)
372{
373 ec_curve *c = ECPT_C(me);
374 ec *pp = ECPT_P(me);
375 PyObject *fobj = ECPT_FOBJ(me);
376 ec p = EC_INIT;
377 PyObject *rc;
378
379 if (EC_ATINF(pp)) RETURN_NONE;
380 EC_OUT(c, &p, pp);
381 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
382 EC_DESTROY(&p);
383 return (rc);
384}
385
386static PyObject *epget__x(PyObject *me, void *hunoz)
387{
388 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
389 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
390}
391
392static PyObject *epget__y(PyObject *me, void *hunoz)
393{
394 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
395 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
396}
397
398static PyObject *epget__z(PyObject *me, void *hunoz)
399{
400 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
401 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
402}
403
404static mp *coord_in(field *f, PyObject *x)
405{
406 mp *xx;
407 if (FE_PYCHECK(x) && FE_F(x) == f)
408 return (MP_COPY(FE_X(x)));
409 else if ((xx = getmp(x)) == 0)
410 return (0);
411 else
412 return (F_IN(f, xx, xx));
413}
414
415static int ecptxl_3(ec_curve *c, ec *p,
416 PyObject *x, PyObject *y, PyObject *z)
417{
418 int rc = -1;
419
420 if (!x || !y || !z) TYERR("missing argument");
421 if (!c) VALERR("internal form with no curve!");
422 if ((p->x == coord_in(c->f, x)) == 0 ||
423 (p->y == coord_in(c->f, y)) == 0 ||
424 (z != Py_None && (p->z = coord_in(c->f, z))) == 0)
425 goto end;
426 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
427 rc = 0;
428end:
429 return (rc);
430}
431
432static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
433{
434 int rc = -1;
435
436 if (!x || !y) TYERR("missing argument");
437 if ((p->x = getmp(x)) == 0 ||
438 (p->y = getmp(y)) == 0)
439 goto end;
440 if (c) EC_IN(c, p, p);
441 rc = 0;
442end:
443 return (rc);
444}
445
446static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
447{
448 int rc = -1;
449 PyObject *y = 0, *z = 0, *t = 0;
450 mp *xx = 0;
451 const void *q;
452 int n;
453 qd_parse qd;
454
455 Py_XINCREF(x);
456 if (!x || x == Py_None)
457 /*cool*/;
458 else if (ECPT_PYCHECK(x)) {
459 getecptout(p, x);
460 goto fix;
461 } else if (PyString_Check(x)) {
462 if (PyObject_AsReadBuffer(x, &q, 0))
463 goto end;
464 qd.p = q;
465 qd.e = 0;
466 if (!ec_ptparse(&qd, p))
80f7cd89 467 VALERR(qd.e);
d7ab1bab 468 goto fix;
469 } else if (c && (xx = tomp(x)) != 0) {
470 xx = F_IN(c->f, xx, xx);
471 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
472 } else if (PySequence_Check(x)) {
473 t = x; x = 0;
474 n = PySequence_Size(t);
475 if (n != 2 && (n != 3 || !c))
476 TYERR("want sequence of two or three items");
477 if ((x = PySequence_GetItem(t, 0)) == 0 ||
478 (y = PySequence_GetItem(t, 1)) == 0 ||
479 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
480 goto end;
481 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
482 } else
483 TYERR("can't convert to curve point");
484 goto ok;
485
486fix:
487 if (c) EC_IN(c, p, p);
488ok:
489 rc = 0;
490end:
491 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
492 mp_drop(xx);
493 return (rc);
494}
495
496static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
497{
498 if (z)
499 return (ecptxl_3(c, p, x, y, z));
500 else if (y)
501 return (ecptxl_2(c, p, x, y));
502 else
503 return (ecptxl_1(c, p, x));
504}
505
d7ab1bab 506static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
507{
508 PyObject *x = 0, *y = 0, *z = 0;
509 ec p = EC_INIT;
510 char *kwlist[] = { "x", "y", 0 };
511
512 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", kwlist, &x, &y) ||
513 ecptxl(0, &p, x, y, z))
514 goto end;
515 return (ecpt_pywrapout(ty, &p));
516end:
517 EC_DESTROY(&p);
518 return (0);
519}
520
521static PyObject *ecpt_pyint(PyObject *me)
522{
523 ec p = EC_INIT;
524 long l;
525 PyObject *rc = 0;
526 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
527 getecptout(&p, me);
bc243788
MW		 528 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
529 else rc = mp_topylong(p.x);
d7ab1bab 530end:
531 EC_DESTROY(&p);
532 return (rc);
533}
534
535static PyObject *ecpt_pylong(PyObject *me)
536{
537 ec p = EC_INIT;
538 PyObject *rc = 0;
539 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
540 getecptout(&p, me);
f368b46e 541 rc = mp_topylong(p.x);
d7ab1bab 542end:
543 EC_DESTROY(&p);
544 return (rc);
545}
546
547static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
548{
549 PyObject *x = 0, *y = 0, *z = 0;
550 ec p = EC_INIT;
551 char *kwlist[] = { "x", "y", "z", 0 };
552
553 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", kwlist,
554 &x, &y, &z) ||
555 ecptxl(ECCURVE_C(ty), &p, x, y, z))
556 goto end;
557 return (ecpt_pywrap((PyObject *)ty, &p));
558end:
559 EC_DESTROY(&p);
560 return (0);
561}
562
563static PyGetSetDef ecptnc_pygetset[] = {
564#define GETSETNAME(op, name) epnc##op##_##name
565 GET (ix, "P.ix -> integer x coordinate of P")
566 GET (iy, "P.iy -> integer y coordinate of P")
567 GET (point, "P.point -> standalone curve point (no-op)")
568#undef GETSETNAME
569 { 0 }
570};
571
572static PyMethodDef ecptnc_pymethods[] = {
573#define METHNAME(func) epmeth_##func
574 METH (tobuf, "X.tobuf() -> BIN")
575#undef METHNAME
576 { 0 }
577};
578
579static PyNumberMethods ecpt_pynumber = {
580 0, /* @nb_add@ */
581 0, /* @nb_subtract@ */
582 0, /* @nb_multiply@ */
583 0, /* @nb_divide@ */
584 0, /* @nb_remainder@ */
585 0, /* @nb_divmod@ */
586 0, /* @nb_power@ */
587 0, /* @nb_negative@ */
588 0, /* @nb_positive@ */
589 0, /* @nb_absolute@ */
590 ecpt_pynonzerop, /* @nb_nonzero@ */
591 0, /* @nb_invert@ */
592 0, /* @nb_lshift@ */
593 0, /* @nb_rshift@ */
594 0, /* @nb_and@ */
595 0, /* @nb_xor@ */
596 0, /* @nb_or@ */
597 0, /* @nb_coerce@ */
598 ecpt_pyint, /* @nb_int@ */
599 ecpt_pylong, /* @nb_long@ */
600 0, /* @nb_float@ */
601 0, /* @nb_oct@ */
602 0, /* @nb_hex@ */
603
604 0, /* @nb_inplace_add@ */
605 0, /* @nb_inplace_subtract@ */
606 0, /* @nb_inplace_multiply@ */
607 0, /* @nb_inplace_divide@ */
608 0, /* @nb_inplace_remainder@ */
609 0, /* @nb_inplace_power@ */
610 0, /* @nb_inplace_lshift@ */
611 0, /* @nb_inplace_rshift@ */
612 0, /* @nb_inplace_and@ */
613 0, /* @nb_inplace_xor@ */
614 0, /* @nb_inplace_or@ */
615
616 0, /* @nb_floor_divide@ */
617 0, /* @nb_true_divide@ */
618 0, /* @nb_inplace_floor_divide@ */
619 0, /* @nb_inplace_true_divide@ */
620};
621
622static PyTypeObject ecpt_pytype_skel = {
6d4db0bf 623 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 624 "ECPt", /* @tp_name@ */
d7ab1bab 625 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
626 0, /* @tp_itemsize@ */
627
628 ecpt_pydealloc, /* @tp_dealloc@ */
629 0, /* @tp_print@ */
630 0, /* @tp_getattr@ */
631 0, /* @tp_setattr@ */
632 0, /* @tp_compare@ */
633 0, /* @tp_repr@ */
634 &ecpt_pynumber, /* @tp_as_number@ */
635 0, /* @tp_as_sequence@ */
636 0, /* @tp_as_mapping@ */
637 ecpt_pyhash, /* @tp_hash@ */
638 0, /* @tp_call@ */
639 0, /* @tp_str@ */
640 0, /* @tp_getattro@ */
641 0, /* @tp_setattro@ */
642 0, /* @tp_as_buffer@ */
643 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
644 Py_TPFLAGS_CHECKTYPES |
645 Py_TPFLAGS_BASETYPE,
646
647 /* @tp_doc@ */
06cd26e8
MW		 648"ECPt([X, [Y]]): elliptic curve points, not associated with any curve.\n\
649 X alone may be None, an existing point, a string 'X, Y', an\n\
650 x-coordinate, or a pair (X, Y); X and Y should be a coordinate pair.",
d7ab1bab 651
652 0, /* @tp_traverse@ */
653 0, /* @tp_clear@ */
654 ecpt_pyrichcompare, /* @tp_richcompare@ */
655 0, /* @tp_weaklistoffset@ */
656 0, /* @tp_iter@ */
963a6148 657 0, /* @tp_iternext@ */
d7ab1bab 658 ecptnc_pymethods, /* @tp_methods@ */
659 0, /* @tp_members@ */
660 ecptnc_pygetset, /* @tp_getset@ */
661 0, /* @tp_base@ */
662 0, /* @tp_dict@ */
663 0, /* @tp_descr_get@ */
664 0, /* @tp_descr_set@ */
665 0, /* @tp_dictoffset@ */
666 0, /* @tp_init@ */
667 PyType_GenericAlloc, /* @tp_alloc@ */
668 ecptnc_pynew, /* @tp_new@ */
3aa33042 669 0, /* @tp_free@ */
d7ab1bab 670 0 /* @tp_is_gc@ */
671};
672
673static PyGetSetDef ecpt_pygetset[] = {
674#define GETSETNAME(op, name) ep##op##_##name
675 GET (curve, "P.curve -> elliptic curve containing P")
676 GET (point, "P.point -> standalone curve point")
677 GET (x, "P.x -> Cartesian x coordinate of P")
678 GET (y, "P.y -> Cartesian y coordinate of P")
679 GET (_x, "P._x -> internal x coordinate of P")
680 GET (_y, "P._y -> internal y coordinate of P")
681 GET (_z, "P._z -> internal z coordinate of P, or None")
682#undef GETSETNAME
683 { 0 }
684};
685
686static PyMethodDef ecpt_pymethods[] = {
687#define METHNAME(func) epmeth_##func
688 METH (toraw, "X.toraw() -> BIN")
e12df5f3 689 KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
d7ab1bab 690 METH (dbl, "X.dbl() -> X + X")
3aa33042 691 METH (oncurvep, "X.oncurvep() -> BOOL")
d7ab1bab 692#undef METHNAME
693 { 0 }
694};
695
696static PyNumberMethods ecptcurve_pynumber = {
697 ecpt_pyadd, /* @nb_add@ */
698 ecpt_pysub, /* @nb_subtract@ */
699 ecpt_pymul, /* @nb_multiply@ */
700 0, /* @nb_divide@ */
701 0, /* @nb_remainder@ */
702 0, /* @nb_divmod@ */
703 0, /* @nb_power@ */
704 ecpt_pyneg, /* @nb_negative@ */
705 ecpt_pyid, /* @nb_positive@ */
706 0, /* @nb_absolute@ */
707 0, /* @nb_nonzero@ */
708 0, /* @nb_invert@ */
709 0, /* @nb_lshift@ */
710 0, /* @nb_rshift@ */
711 0, /* @nb_and@ */
712 0, /* @nb_xor@ */
713 0, /* @nb_or@ */
714 0, /* @nb_coerce@ */
715 0, /* @nb_int@ */
716 0, /* @nb_long@ */
717 0, /* @nb_float@ */
718 0, /* @nb_oct@ */
719 0, /* @nb_hex@ */
720
721 0, /* @nb_inplace_add@ */
722 0, /* @nb_inplace_subtract@ */
723 0, /* @nb_inplace_multiply@ */
724 0, /* @nb_inplace_divide@ */
725 0, /* @nb_inplace_remainder@ */
726 0, /* @nb_inplace_power@ */
727 0, /* @nb_inplace_lshift@ */
728 0, /* @nb_inplace_rshift@ */
729 0, /* @nb_inplace_and@ */
730 0, /* @nb_inplace_xor@ */
731 0, /* @nb_inplace_or@ */
732
733 0, /* @nb_floor_divide@ */
734 0, /* @nb_true_divide@ */
735 0, /* @nb_inplace_floor_divide@ */
736 0, /* @nb_inplace_true_divide@ */
737};
738
739static PyTypeObject ecptcurve_pytype_skel = {
6d4db0bf 740 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 741 "ECPtCurve", /* @tp_name@ */
d7ab1bab 742 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
743 0, /* @tp_itemsize@ */
744
745 ecpt_pydealloc, /* @tp_dealloc@ */
746 0, /* @tp_print@ */
747 0, /* @tp_getattr@ */
748 0, /* @tp_setattr@ */
749 0, /* @tp_compare@ */
750 0, /* @tp_repr@ */
751 &ecptcurve_pynumber, /* @tp_as_number@ */
752 0, /* @tp_as_sequence@ */
753 0, /* @tp_as_mapping@ */
754 0, /* @tp_hash@ */
755 0, /* @tp_call@ */
756 0, /* @tp_str@ */
757 0, /* @tp_getattro@ */
758 0, /* @tp_setattro@ */
759 0, /* @tp_as_buffer@ */
760 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
761 Py_TPFLAGS_CHECKTYPES |
762 Py_TPFLAGS_BASETYPE,
763
764 /* @tp_doc@ */
765"Elliptic curve points; abstract base class for points on given curves.",
766
767 0, /* @tp_traverse@ */
768 0, /* @tp_clear@ */
769 0, /* @tp_richcompare@ */
770 0, /* @tp_weaklistoffset@ */
771 0, /* @tp_iter@ */
963a6148 772 0, /* @tp_iternext@ */
d7ab1bab 773 ecpt_pymethods, /* @tp_methods@ */
774 0, /* @tp_members@ */
775 ecpt_pygetset, /* @tp_getset@ */
776 0, /* @tp_base@ */
777 0, /* @tp_dict@ */
778 0, /* @tp_descr_get@ */
779 0, /* @tp_descr_set@ */
780 0, /* @tp_dictoffset@ */
781 0, /* @tp_init@ */
782 PyType_GenericAlloc, /* @tp_alloc@ */
783 abstract_pynew, /* @tp_new@ */
3aa33042 784 0, /* @tp_free@ */
d7ab1bab 785 0 /* @tp_is_gc@ */
786};
787
788/*----- Elliptic curves themselves ----------------------------------------*/
789
790static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
791{
792 int b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
793 switch (op) {
794 case Py_EQ: break;
795 case Py_NE: b = !b;
796 default: TYERR("can't order elliptic curves");
797 }
798 return (getbool(b));
799end:
800 return (0);
801}
802
803static PyObject *ecmmul_id(PyObject *me)
804 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
805
806static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
807{
808 ec_mulfactor *f = pp;
809
50bff227 810 EC_CREATE(&f->base);
d7ab1bab 811 if (getecpt(ECCURVE_C(me), &f->base, x) ||
812 (f->exp = getmp(m)) == 0)
813 return (-1);
d7ab1bab 814 return (0);
815}
816
817static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
818{
819 ec p = EC_INIT;
820 ec_immul(ECCURVE_C(me), &p, pp, n);
821 return (ecpt_pywrap(me, &p));
822}
823
824static void ecmmul_drop(void *pp)
825{
826 ec_mulfactor *f = pp;
827 EC_DESTROY(&f->base);
828 MP_DROP(f->exp);
829}
830
831static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
832{
833 return (mexp_common(me, arg, sizeof(ec_mulfactor),
834 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
835}
836
837static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
838{
839 char *p;
6b54260d 840 Py_ssize_t len;
d7ab1bab 841 buf b;
842 PyObject *rc = 0;
843 ec_curve *cc;
844 ec pp = EC_INIT;
845
846 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
847 return (0);
848 buf_init(&b, p, len);
849 cc = ECCURVE_C(me);
850 if (ec_getraw(cc, &b, &pp))
80f7cd89 851 VALERR("bad point");
d7ab1bab 852 EC_IN(cc, &pp, &pp);
853 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
854end:
855 return (rc);
856}
857
e12df5f3
MW		 858static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
859 PyObject *arg, PyObject *kw)
860{
861 char *p;
6b54260d 862 Py_ssize_t len;
e12df5f3
MW		 863 buf b;
864 PyObject *rc = 0;
865 ec_curve *cc;
866 int f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
867 ec pp = EC_INIT;
868 char *kwlist[] = { "buf", "flags", 0 };
869
870 if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|f:os2ecp", kwlist,
871 &me, &p, &len, &f))
872 return (0);
873 buf_init(&b, p, len);
874 cc = ECCURVE_C(me);
875 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
876 EC_IN(cc, &pp, &pp);
877 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
878end:
879 return (rc);
880}
881
d7ab1bab 882static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
883{
884 buf b;
885 char *p;
6b54260d 886 Py_ssize_t sz;
d7ab1bab 887 PyObject *rc = 0;
888 ec pp = EC_INIT;
889
890 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
891 buf_init(&b, p, sz);
892 if (buf_getec(&b, &pp)) VALERR("malformed data");
893 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
894 bytestring_pywrapbuf(&b));
895end:
896 return (rc);
897}
898
899static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
900{
901 char *p;
902 qd_parse qd;
903 PyObject *rc = 0;
904 ec pp = EC_INIT;
905
906 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
907 qd.p = p;
908 qd.e = 0;
80f7cd89 909 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
d7ab1bab 910 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
911end:
912 return (rc);
913}
914
915static void eccurve_pydealloc(PyObject *me)
916{
917 ec_destroycurve(ECCURVE_C(me));
918 Py_DECREF(ECCURVE_FOBJ(me));
919 PyType_Type.tp_dealloc(me);
920}
921
922static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
923{
924 PyObject *x;
925 mp *xx = 0;
926 ec p = EC_INIT;
927 PyObject *rc = 0;
928
929 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
930 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
931 xx = MP_COPY(FE_X(x));
932 else if ((xx = getmp(x)) == 0)
933 goto end;
934 else
935 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
936 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
937 VALERR("not on the curve");
938 rc = ecpt_pywrap(me, &p);
939end:
940 if (xx) MP_DROP(xx);
941 return (rc);
942}
943
944static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
945{
946 char *kwlist[] = { "rng", 0 };
947 grand *r = &rand_global;
948 ec p = EC_INIT;
949
950 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", kwlist,
951 convgrand, &r))
952 return (0);
953 ec_rand(ECCURVE_C(me), &p, r);
954 EC_IN(ECCURVE_C(me), &p, &p);
955 return (ecpt_pywrap(me, &p));
956}
957
958static PyObject *eccurve_dopywrap(PyTypeObject *ty,
959 PyObject *fobj, ec_curve *c)
960{
df9f8366 961 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 962 cobj->c = c;
963 cobj->fobj = fobj;
24b3d57b
MW		 964 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
965 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 966 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 967 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
968 Py_TPFLAGS_BASETYPE |
969 Py_TPFLAGS_CHECKTYPES |
970 Py_TPFLAGS_HEAPTYPE);
971 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
972 cobj->ty.ht_type.tp_free = 0;
973 cobj->ty.ht_type.tp_new = ecpt_pynew;
dc075750 974 typeready(&cobj->ty.ht_type);
d7ab1bab 975 return ((PyObject *)cobj);
976}
977
978PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
979{
980 PyTypeObject *ty;
981
982 if (!fobj)
983 fobj = field_pywrap(c->f);
984 else
985 Py_INCREF(fobj);
986 assert(FIELD_F(fobj) == c->f);
987 if (strcmp(EC_NAME(c), "prime") == 0)
988 ty = ecprimecurve_pytype;
989 else if (strcmp(EC_NAME(c), "primeproj") == 0)
990 ty = ecprimeprojcurve_pytype;
991 else if (strcmp(EC_NAME(c), "bin") == 0)
992 ty = ecbincurve_pytype;
993 else if (strcmp(EC_NAME(c), "binproj") == 0)
994 ty = ecbinprojcurve_pytype;
995 else
996 abort();
997 return (eccurve_dopywrap(ty, fobj, c));
998}
999
1000static PyObject *eccurve_pynew(PyTypeObject *ty,
1001 ec_curve *(*make)(field *, mp *, mp *),
1002 PyObject *arg, PyObject *kw)
1003{
1004 PyObject *fobj;
1005 PyObject *cobj = 0;
1006 char *kwlist[] = { "field", "a", "b", 0 };
1007 mp *aa = 0, *bb = 0;
1008
5f959e50 1009 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", kwlist,
d7ab1bab 1010 field_pytype, &fobj,
1011 convmp, &aa, convmp, &bb))
1012 goto end;
1013 Py_INCREF(fobj);
1014 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1015end:
1016 if (aa) MP_DROP(aa);
1017 if (bb) MP_DROP(bb);
1018 return (cobj);
1019}
1020
1021static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
1022{
1023 char *p;
1024 qd_parse qd;
1025 ec_curve *c;
1026 PyObject *rc = 0;
1027
46e6ad89 1028 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
d7ab1bab 1029 goto end;
1030 qd.p = p;
1031 qd.e = 0;
1032 if ((c = ec_curveparse(&qd)) == 0)
80f7cd89 1033 VALERR(qd.e);
d7ab1bab 1034 rc = eccurve_pywrap(0, c);
1035end:
1036 return (rc);
1037}
1038
1039static PyObject *ecget_name(PyObject *me, void *hunoz)
1040 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1041
1042static PyObject *ecget_a(PyObject *me, void *hunoz)
1043 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1044
b2687a0a 1045static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 1046 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1047
1048static PyObject *ecget_field(PyObject *me, void *hunoz)
1049 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1050
1051static PyObject *ecget_inf(PyObject *me, void *hunoz)
1052 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1053
1054static PyGetSetDef eccurve_pygetset[] = {
1055#define GETSETNAME(op, name) ec##op##_##name
1056 GET (name, "E.name -> name of this kind of curve")
1057 GET (a, "E.a -> first parameter of curve")
1058 GET (b, "E.b -> second parameter of curve")
1059 GET (field, "E.field -> finite field containing this curve")
1060 GET (inf, "E.inf -> point at infinity of this curve")
1061#undef GETSETNAME
1062 { 0 }
b2687a0a 1063};
d7ab1bab 1064
1065static PyMethodDef eccurve_pymethods[] = {
1066#define METHNAME(name) ecmeth_##name
1067 METH (mmul, "\
1068E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1069 METH (find, "E.find(X) -> P")
1070 KWMETH(rand, "E.rand(rng = rand) ->P")
1071#undef METHNAME
1072 { 0 }
1073};
1074
1075static PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1076 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1077 "ECCurve", /* @tp_name@ */
d7ab1bab 1078 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1079 0, /* @tp_itemsize@ */
1080
1081 eccurve_pydealloc, /* @tp_dealloc@ */
1082 0, /* @tp_print@ */
1083 0, /* @tp_getattr@ */
1084 0, /* @tp_setattr@ */
1085 0, /* @tp_compare@ */
1086 0, /* @tp_repr@ */
1087 0, /* @tp_as_number@ */
1088 0, /* @tp_as_sequence@ */
1089 0, /* @tp_as_mapping@ */
1090 0, /* @tp_hash@ */
1091 0, /* @tp_call@ */
1092 0, /* @tp_str@ */
1093 0, /* @tp_getattro@ */
1094 0, /* @tp_setattro@ */
1095 0, /* @tp_as_buffer@ */
1096 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1097 Py_TPFLAGS_BASETYPE,
1098
1099 /* @tp_doc@ */
06cd26e8 1100"An elliptic curve. Abstract class.",
d7ab1bab 1101
1102 0, /* @tp_traverse@ */
1103 0, /* @tp_clear@ */
1104 eccurve_pyrichcompare, /* @tp_richcompare@ */
1105 0, /* @tp_weaklistoffset@ */
1106 0, /* @tp_iter@ */
963a6148 1107 0, /* @tp_iternext@ */
d7ab1bab 1108 eccurve_pymethods, /* @tp_methods@ */
1109 0, /* @tp_members@ */
1110 eccurve_pygetset, /* @tp_getset@ */
1111 0, /* @tp_base@ */
1112 0, /* @tp_dict@ */
1113 0, /* @tp_descr_get@ */
1114 0, /* @tp_descr_set@ */
1115 0, /* @tp_dictoffset@ */
1116 0, /* @tp_init@ */
1117 PyType_GenericAlloc, /* @tp_alloc@ */
1118 abstract_pynew, /* @tp_new@ */
3aa33042 1119 0, /* @tp_free@ */
d7ab1bab 1120 0 /* @tp_is_gc@ */
1121};
1122
1123static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1124 PyObject *arg, PyObject *kw)
1125{
1126 return (eccurve_pynew(ty, ec_prime, arg, kw));
1127}
1128
1129static PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1130 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1131 "ECPrimeCurve", /* @tp_name@ */
d7ab1bab 1132 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1133 0, /* @tp_itemsize@ */
1134
1135 eccurve_pydealloc, /* @tp_dealloc@ */
1136 0, /* @tp_print@ */
1137 0, /* @tp_getattr@ */
1138 0, /* @tp_setattr@ */
1139 0, /* @tp_compare@ */
1140 0, /* @tp_repr@ */
1141 0, /* @tp_as_number@ */
1142 0, /* @tp_as_sequence@ */
1143 0, /* @tp_as_mapping@ */
1144 0, /* @tp_hash@ */
1145 0, /* @tp_call@ */
1146 0, /* @tp_str@ */
1147 0, /* @tp_getattro@ */
1148 0, /* @tp_setattro@ */
1149 0, /* @tp_as_buffer@ */
1150 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1151 Py_TPFLAGS_BASETYPE,
1152
1153 /* @tp_doc@ */
06cd26e8
MW		 1154"ECPrimeCurve(FIELD, A, B): an elliptic curve over a prime field.\n\
1155 Use ECPrimeProjCurve instead.",
d7ab1bab 1156
1157 0, /* @tp_traverse@ */
1158 0, /* @tp_clear@ */
1159 eccurve_pyrichcompare, /* @tp_richcompare@ */
1160 0, /* @tp_weaklistoffset@ */
1161 0, /* @tp_iter@ */
963a6148 1162 0, /* @tp_iternext@ */
d7ab1bab 1163 0, /* @tp_methods@ */
1164 0, /* @tp_members@ */
1165 0, /* @tp_getset@ */
1166 0, /* @tp_base@ */
1167 0, /* @tp_dict@ */
1168 0, /* @tp_descr_get@ */
1169 0, /* @tp_descr_set@ */
1170 0, /* @tp_dictoffset@ */
1171 0, /* @tp_init@ */
1172 PyType_GenericAlloc, /* @tp_alloc@ */
1173 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1174 0, /* @tp_free@ */
d7ab1bab 1175 0 /* @tp_is_gc@ */
1176};
1177
1178static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1179 PyObject *arg, PyObject *kw)
1180{
1181 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1182}
1183
1184static PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1185 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1186 "ECPrimeProjCurve", /* @tp_name@ */
d7ab1bab 1187 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1188 0, /* @tp_itemsize@ */
1189
1190 eccurve_pydealloc, /* @tp_dealloc@ */
1191 0, /* @tp_print@ */
1192 0, /* @tp_getattr@ */
1193 0, /* @tp_setattr@ */
1194 0, /* @tp_compare@ */
1195 0, /* @tp_repr@ */
1196 0, /* @tp_as_number@ */
1197 0, /* @tp_as_sequence@ */
1198 0, /* @tp_as_mapping@ */
1199 0, /* @tp_hash@ */
1200 0, /* @tp_call@ */
1201 0, /* @tp_str@ */
1202 0, /* @tp_getattro@ */
1203 0, /* @tp_setattro@ */
1204 0, /* @tp_as_buffer@ */
1205 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1206 Py_TPFLAGS_BASETYPE,
1207
1208 /* @tp_doc@ */
06cd26e8
MW		 1209"ECPrimeProjCurve(FIELD, A, B): an elliptic curve over a prime field\n\
1210 using projective coordinates.",
d7ab1bab 1211
1212 0, /* @tp_traverse@ */
1213 0, /* @tp_clear@ */
1214 eccurve_pyrichcompare, /* @tp_richcompare@ */
1215 0, /* @tp_weaklistoffset@ */
1216 0, /* @tp_iter@ */
963a6148 1217 0, /* @tp_iternext@ */
d7ab1bab 1218 0, /* @tp_methods@ */
1219 0, /* @tp_members@ */
1220 0, /* @tp_getset@ */
1221 0, /* @tp_base@ */
1222 0, /* @tp_dict@ */
1223 0, /* @tp_descr_get@ */
1224 0, /* @tp_descr_set@ */
1225 0, /* @tp_dictoffset@ */
1226 0, /* @tp_init@ */
1227 PyType_GenericAlloc, /* @tp_alloc@ */
1228 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1229 0, /* @tp_free@ */
d7ab1bab 1230 0 /* @tp_is_gc@ */
1231};
1232
1233static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1234 PyObject *arg, PyObject *kw)
1235{
1236 return (eccurve_pynew(ty, ec_bin, arg, kw));
1237}
1238
1239static PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1240 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1241 "ECBinCurve", /* @tp_name@ */
d7ab1bab 1242 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1243 0, /* @tp_itemsize@ */
1244
1245 eccurve_pydealloc, /* @tp_dealloc@ */
1246 0, /* @tp_print@ */
1247 0, /* @tp_getattr@ */
1248 0, /* @tp_setattr@ */
1249 0, /* @tp_compare@ */
1250 0, /* @tp_repr@ */
1251 0, /* @tp_as_number@ */
1252 0, /* @tp_as_sequence@ */
1253 0, /* @tp_as_mapping@ */
1254 0, /* @tp_hash@ */
1255 0, /* @tp_call@ */
1256 0, /* @tp_str@ */
1257 0, /* @tp_getattro@ */
1258 0, /* @tp_setattro@ */
1259 0, /* @tp_as_buffer@ */
1260 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1261 Py_TPFLAGS_BASETYPE,
1262
1263 /* @tp_doc@ */
06cd26e8
MW		 1264"ECBinCurve(FIELD, A, B): an elliptic curve over a binary field.\n\
1265 Use ECBinProjCurve instead.",
d7ab1bab 1266
1267 0, /* @tp_traverse@ */
1268 0, /* @tp_clear@ */
1269 eccurve_pyrichcompare, /* @tp_richcompare@ */
1270 0, /* @tp_weaklistoffset@ */
1271 0, /* @tp_iter@ */
963a6148 1272 0, /* @tp_iternext@ */
d7ab1bab 1273 0, /* @tp_methods@ */
1274 0, /* @tp_members@ */
1275 0, /* @tp_getset@ */
1276 0, /* @tp_base@ */
1277 0, /* @tp_dict@ */
1278 0, /* @tp_descr_get@ */
1279 0, /* @tp_descr_set@ */
1280 0, /* @tp_dictoffset@ */
1281 0, /* @tp_init@ */
1282 PyType_GenericAlloc, /* @tp_alloc@ */
1283 ecbincurve_pynew, /* @tp_new@ */
3aa33042 1284 0, /* @tp_free@ */
d7ab1bab 1285 0 /* @tp_is_gc@ */
1286};
1287
1288static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1289 PyObject *arg, PyObject *kw)
1290{
1291 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1292}
1293
1294static PyTypeObject ecbinprojcurve_pytype_skel = {
6d4db0bf 1295 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1296 "ECBinProjCurve", /* @tp_name@ */
d7ab1bab 1297 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1298 0, /* @tp_itemsize@ */
1299
1300 eccurve_pydealloc, /* @tp_dealloc@ */
1301 0, /* @tp_print@ */
1302 0, /* @tp_getattr@ */
1303 0, /* @tp_setattr@ */
1304 0, /* @tp_compare@ */
1305 0, /* @tp_repr@ */
1306 0, /* @tp_as_number@ */
1307 0, /* @tp_as_sequence@ */
1308 0, /* @tp_as_mapping@ */
1309 0, /* @tp_hash@ */
1310 0, /* @tp_call@ */
1311 0, /* @tp_str@ */
1312 0, /* @tp_getattro@ */
1313 0, /* @tp_setattro@ */
1314 0, /* @tp_as_buffer@ */
1315 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1316 Py_TPFLAGS_BASETYPE,
1317
1318 /* @tp_doc@ */
06cd26e8
MW		 1319"ECBinProjCurve(FIELD, A, B): an elliptic curve over a binary field,\n\
1320 using projective coordinates.",
d7ab1bab 1321
1322 0, /* @tp_traverse@ */
1323 0, /* @tp_clear@ */
1324 eccurve_pyrichcompare, /* @tp_richcompare@ */
1325 0, /* @tp_weaklistoffset@ */
1326 0, /* @tp_iter@ */
963a6148 1327 0, /* @tp_iternext@ */
d7ab1bab 1328 0, /* @tp_methods@ */
1329 0, /* @tp_members@ */
1330 0, /* @tp_getset@ */
1331 0, /* @tp_base@ */
1332 0, /* @tp_dict@ */
1333 0, /* @tp_descr_get@ */
1334 0, /* @tp_descr_set@ */
1335 0, /* @tp_dictoffset@ */
1336 0, /* @tp_init@ */
1337 PyType_GenericAlloc, /* @tp_alloc@ */
1338 ecbinprojcurve_pynew, /* @tp_new@ */
3aa33042 1339 0, /* @tp_free@ */
d7ab1bab 1340 0 /* @tp_is_gc@ */
1341};
1342
1343/*----- Curve info --------------------------------------------------------*/
1344
1345static int ncurves = -1;
1346
1347void ecinfo_copy(ec_info *eic, const ec_info *ei)
1348{
1349 eic->c = eccurve_copy(ei->c);
1350 EC_CREATE(&eic->g);
1351 EC_COPY(&eic->g, &ei->g);
1352 eic->r = MP_COPY(ei->r);
1353 eic->h = MP_COPY(ei->h);
1354}
1355
1356PyObject *ecinfo_pywrap(ec_info *ei)
1357{
1358 ecinfo_pyobj *o;
1359
1360 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1361 o->ei = *ei;
1362 o->cobj = eccurve_pywrap(0, o->ei.c);
1363 Py_INCREF(o->cobj);
1364 return ((PyObject *)o);
1365}
1366
1367static void ecinfo_pydealloc(PyObject *me)
1368{
1369 ec_info *ei = ECINFO_EI(me);
1370 EC_DESTROY(&ei->g);
1371 MP_DROP(ei->r);
1372 MP_DROP(ei->h);
1373 Py_DECREF(ECINFO_COBJ(me));
3aa33042 1374 FREEOBJ(me);
d7ab1bab 1375}
1376
1377static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1378{
1379 ec_info ei = { 0 };
1380 PyObject *e, *g;
1381 char *kwlist[] = { "curve", "G", "r", "h", 0 };
1382 ecinfo_pyobj *rc = 0;
1383
1384 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", kwlist,
1385 eccurve_pytype, &e, ecpt_pytype, &g,
1386 convmp, &ei.r, convmp, &ei.h))
1387 goto end;
1388 if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e)))
1389 TYERR("point not from this curve");
1390 ei.c = ECCURVE_C(e);
1391 EC_CREATE(&ei.g);
30720615 1392 EC_OUT(ei.c, &ei.g, ECPT_P(g));
d7ab1bab 1393 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1394 rc->ei = ei;
1395 rc->cobj = e;
1396 Py_INCREF(rc->cobj);
1397 return ((PyObject *)rc);
1398
1399end:
1400 mp_drop(ei.r);
1401 mp_drop(ei.h);
1402 return (0);
1403}
1404
1405static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
1406{
1407 char *p;
1408 qd_parse qd;
1409 ec_info ei;
1410 PyObject *rc = 0;
1411
1412 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1413 goto end;
1414 qd.p = p;
1415 qd.e = 0;
1416 if (ec_infoparse(&qd, &ei))
80f7cd89 1417 VALERR(qd.e);
d7ab1bab 1418 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1419end:
1420 return (rc);
1421}
1422
1423static PyObject *meth__ECInfo__curven(PyObject *me, PyObject *arg)
1424{
1425 int i;
1426 ec_info ei;
1427 PyObject *rc = 0;
1428
1429 if (!PyArg_ParseTuple(arg, "Oi:_curven", &me, &i)) goto end;
1430 if (i < 0 || i >= ncurves) VALERR("curve index out of range");
1431 ec_infofromdata(&ei, ectab[i].data);
1432 rc = ecinfo_pywrap(&ei);
1433end:
1434 return (rc);
1435}
1436
1437static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1438{
1439 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1440 switch (op) {
1441 case Py_EQ: break;
1442 case Py_NE: b = !b;
1443 default: TYERR("can't order elliptic curve infos");
1444 }
1445 return (getbool(b));
1446end:
1447 return (0);
1448}
1449
1450static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1451{
1452 char *kwlist[] = { "rng", 0 };
1453 grand *r = &rand_global;
1454 const char *p;
1455
1456 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", kwlist,
1457 convgrand, &r))
1458 goto end;
1459 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1460 VALERR(p);
1461 RETURN_ME;
1462end:
1463 return (0);
1464}
1465
1466static PyObject *eiget_curve(PyObject *me, void *hunoz)
1467 { RETURN_OBJ(ECINFO_COBJ(me)); }
1468
1469static PyObject *eiget_G(PyObject *me, void *hunoz)
1470{
1471 ec_info *ei = ECINFO_EI(me);
1472 ec p = EC_INIT;
1473 EC_IN(ei->c, &p, &ei->g);
1474 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1475}
1476
1477static PyObject *eiget_r(PyObject *me, void *hunoz)
1478 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1479
1480static PyObject *eiget_h(PyObject *me, void *hunoz)
1481 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1482
1483static PyGetSetDef ecinfo_pygetset[] = {
1484#define GETSETNAME(op, name) ei##op##_##name
1485 GET (curve, "I.curve -> the elliptic curve")
1486 GET (G, "I.G -> generator point for the group")
1487 GET (r, "I.r -> order of the group (and hence of G")
1488 GET (h, "I.h -> cofactor of the group")
1489#undef GETSETNAME
1490 { 0 }
1491};
1492
1493static PyMethodDef ecinfo_pymethods[] = {
1494#define METHNAME(name) eimeth_##name
1495 KWMETH(check, "I.check() -> None")
1496#undef METHNAME
1497 { 0 }
1498};
1499
1500static PyTypeObject ecinfo_pytype_skel = {
6d4db0bf 1501 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1502 "ECInfo", /* @tp_name@ */
d7ab1bab 1503 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1504 0, /* @tp_itemsize@ */
1505
1506 ecinfo_pydealloc, /* @tp_dealloc@ */
1507 0, /* @tp_print@ */
1508 0, /* @tp_getattr@ */
1509 0, /* @tp_setattr@ */
1510 0, /* @tp_compare@ */
1511 0, /* @tp_repr@ */
1512 0, /* @tp_as_number@ */
1513 0, /* @tp_as_sequence@ */
1514 0, /* @tp_as_mapping@ */
1515 0, /* @tp_hash@ */
1516 0, /* @tp_call@ */
1517 0, /* @tp_str@ */
1518 0, /* @tp_getattro@ */
1519 0, /* @tp_setattro@ */
1520 0, /* @tp_as_buffer@ */
1521 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1522 Py_TPFLAGS_BASETYPE,
1523
1524 /* @tp_doc@ */
06cd26e8 1525"ECInfo(CURVE, G, R, H): elliptic curve domain parameters.",
d7ab1bab 1526
1527 0, /* @tp_traverse@ */
1528 0, /* @tp_clear@ */
1529 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1530 0, /* @tp_weaklistoffset@ */
1531 0, /* @tp_iter@ */
963a6148 1532 0, /* @tp_iternext@ */
d7ab1bab 1533 ecinfo_pymethods, /* @tp_methods@ */
1534 0, /* @tp_members@ */
1535 ecinfo_pygetset, /* @tp_getset@ */
1536 0, /* @tp_base@ */
1537 0, /* @tp_dict@ */
1538 0, /* @tp_descr_get@ */
1539 0, /* @tp_descr_set@ */
1540 0, /* @tp_dictoffset@ */
1541 0, /* @tp_init@ */
1542 PyType_GenericAlloc, /* @tp_alloc@ */
1543 ecinfo_pynew, /* @tp_new@ */
3aa33042 1544 0, /* @tp_free@ */
d7ab1bab 1545 0 /* @tp_is_gc@ */
1546};
1547
1548/*----- Setup -------------------------------------------------------------*/
1549
1550static PyMethodDef methods[] = {
1551#define METHNAME(func) meth_##func
b2687a0a
MW		 1552 METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
1553 METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
e12df5f3 1554 KWMETH(_ECPtCurve_os2ecp, "os2ecp(E, STR, [flags = ...]) -> (P, REST)")
b2687a0a
MW		 1555 METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
1556 METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
1557 METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
1558 METH (_ECInfo__curven, "_curven(N) -> I")
d7ab1bab 1559#undef METHNAME
1560 { 0 }
1561};
1562
1563void ec_pyinit(void)
1564{
1565 INITTYPE(ecpt, root);
1566 INITTYPE(ecptcurve, ecpt);
1567 INITTYPE(eccurve, type);
1568 INITTYPE(ecprimecurve, eccurve);
1569 INITTYPE(ecprimeprojcurve, ecprimecurve);
1570 INITTYPE(ecbincurve, eccurve);
1571 INITTYPE(ecbinprojcurve, ecbincurve);
1572 INITTYPE(ecinfo, root);
1573 addmethods(methods);
1574}
1575
1576static PyObject *namedcurves(void)
1577{
1578 int i, j;
1579 const char *p;
1580 PyObject *d, *c;
1581
1582 d = PyDict_New();
1583 for (i = 0; ectab[i].name; i++) {
1584 p = ectab[i].name;
1585 for (j = 0; j < i; j++) {
1586 if (ectab[i].data == ectab[j].data) {
1587 c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name);
1588 Py_INCREF(c);
1589 goto found;
1590 }
1591 }
1592 c = PyInt_FromLong(i);
1593 found:
98963817 1594 PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
d7ab1bab 1595 Py_DECREF(c);
1596 }
1597 ncurves = i;
1598 return (d);
1599}
1600
1601void ec_pyinsert(PyObject *mod)
1602{
1603 INSERT("ECPt", ecpt_pytype);
1604 INSERT("ECPtCurve", ecptcurve_pytype);
1605 INSERT("ECCurve", eccurve_pytype);
1606 INSERT("ECPrimeCurve", ecprimecurve_pytype);
1607 INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype);
1608 INSERT("ECBinCurve", ecbincurve_pytype);
1609 INSERT("ECBinProjCurve", ecbinprojcurve_pytype);
1610 INSERT("ECInfo", ecinfo_pytype);
1611 INSERT("_eccurves", namedcurves());
1612}
1613
1614/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings