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ec.c: Fix keyword-argument list for `os2ecp'.
[catacomb-python] / ec.c
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d7ab1bab 1/* -*-c-*-
2 *
d7ab1bab 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);
3383fdc1 191 MP_DROP(xx);
d7ab1bab 192 return (ecpt_pywrap(ECPT_COBJ(y), &zz));
193}
194
195static long ecpt_pyhash(PyObject *me)
196{
6d481bc6
MW		 197 uint32 h;
198 buf b;
d7ab1bab 199 ec p = EC_INIT;
6d481bc6
MW		 200 size_t sz = 2*ECPT_C(me)->f->noctets + 1;
201 octet *q = xmalloc(sz);
d7ab1bab 202
6d481bc6
MW		 203 h = 0xe0fdd039 + ECPT_C(me)->f->ops->ty;
204 buf_init(&b, q, sz);
d7ab1bab 205 EC_OUT(ECPT_C(me), &p, ECPT_P(me));
6d481bc6 206 ec_putraw(ECPT_C(me), &b, &p);
d7ab1bab 207 EC_DESTROY(&p);
6d481bc6 208 h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
9acb0b54 209 xfree(q);
6d481bc6 210 return (h % LONG_MAX);
d7ab1bab 211}
212
213static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
214{
215 ec_curve *c;
216 PyObject *cobj;
217 ec p = EC_INIT, q = EC_INIT;
218 int b;
219 PyObject *rc = 0;
220
221 if (ecbinop(x, y, &c, &cobj, &p, &q)) RETURN_NOTIMPL;
222 EC_OUT(c, &p, &p);
223 EC_OUT(c, &q, &q);
224 switch (op) {
225 case Py_EQ: b = EC_EQ(&p, &q); break;
226 case Py_NE: b = !EC_EQ(&p, &q); break;
227 default: TYERR("elliptic curve points are unordered");
228 }
229 rc = getbool(b);
230end:
231 EC_DESTROY(&p);
232 EC_DESTROY(&q);
233 return (rc);
234}
235
236static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
237{
238 if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
49915b4a
MW		 239 return (getbool(EC_ATINF(ECPT_P(me)) ||
240 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
d7ab1bab 241}
242
243static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
244{
245 ec p = EC_INIT;
246 if (!PyArg_ParseTuple(arg, ":dbl")) return (0);
247 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
248 return (ecpt_pywrap(ECPT_COBJ(me), &p));
249}
250
251static PyObject *epmeth_tobuf(PyObject *me, PyObject *arg)
252{
253 buf b;
254 ec p = EC_INIT;
255 PyObject *rc;
256 size_t n;
257
258 if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
259 getecptout(&p, me);
260 if (EC_ATINF(&p))
261 n = 2;
262 else
263 n = mp_octets(p.x) + mp_octets(p.y) + 4;
264 rc = bytestring_pywrap(0, n);
265 buf_init(&b, PyString_AS_STRING(rc), n);
266 buf_putec(&b, &p);
267 assert(BOK(&b));
268 _PyString_Resize(&rc, BLEN(&b));
269 EC_DESTROY(&p);
270 return (rc);
271}
272
273static PyObject *epmeth_toraw(PyObject *me, PyObject *arg)
274{
275 buf b;
276 PyObject *rc;
277 char *p;
278 ec_curve *c = ECPT_C(me);
279 ec pp = EC_INIT;
280 int len;
281
282 if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
283 len = c->f->noctets * 2 + 1;
284 rc = bytestring_pywrap(0, len);
285 p = PyString_AS_STRING(rc);
286 buf_init(&b, p, len);
287 EC_OUT(c, &pp, ECPT_P(me));
288 ec_putraw(c, &b, &pp);
289 EC_DESTROY(&pp);
290 _PyString_Resize(&rc, BLEN(&b));
291 return (rc);
292}
293
e12df5f3
MW		 294static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
295{
296 buf b;
297 PyObject *rc;
298 char *p;
299 ec_curve *c = ECPT_C(me);
300 ec pp = EC_INIT;
301 int f = EC_EXPLY;
302 int len;
303 char *kwlist[] = { "flags", 0 };
304
305 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|i:ectosp", kwlist, &f))
306 return (0);
307 len = c->f->noctets * 2 + 1;
308 rc = bytestring_pywrap(0, len);
309 p = PyString_AS_STRING(rc);
310 buf_init(&b, p, len);
311 EC_OUT(c, &pp, ECPT_P(me));
312 if (ec_ec2osp(c, f, &b, &pp)) {
313 Py_DECREF(rc); rc = 0;
314 VALERR("invalid flags");
315 }
316 EC_DESTROY(&pp);
317 _PyString_Resize(&rc, BLEN(&b));
318end:
319 return (rc);
320}
321
d7ab1bab 322static PyObject *epget_curve(PyObject *me, void *hunoz)
323 { RETURN_OBJ(ECPT_COBJ(me)); }
324
325static PyObject *epncget_ix(PyObject *me, void *hunoz)
326{
327 ec p = EC_INIT;
328 PyObject *rc;
329 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
330 getecptout(&p, me);
331 rc = mp_pywrap(MP_COPY(p.x));
332 EC_DESTROY(&p);
333 return (rc);
334}
335
336static PyObject *epncget_iy(PyObject *me, void *hunoz)
337{
338 ec p = EC_INIT;
339 PyObject *rc;
340 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
341 getecptout(&p, me);
342 rc = mp_pywrap(MP_COPY(p.y));
343 EC_DESTROY(&p);
344 return (rc);
345}
346
347static PyObject *epncget_point(PyObject *me, void *hunoz)
348 { RETURN_ME; }
349
350static PyObject *epget_point(PyObject *me, void *hunoz)
351{
352 ec p = EC_INIT;
353 getecptout(&p, me);
354 return (ecpt_pywrapout(ecpt_pytype, &p));
355}
356
357static PyObject *epget_x(PyObject *me, void *hunoz)
358{
359 ec_curve *c = ECPT_C(me);
360 ec *pp = ECPT_P(me);
361 PyObject *fobj = ECPT_FOBJ(me);
362 ec p = EC_INIT;
363 PyObject *rc;
364
365 if (EC_ATINF(pp)) RETURN_NONE;
366 EC_OUT(c, &p, pp);
367 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
368 EC_DESTROY(&p);
369 return (rc);
370}
371
372static PyObject *epget_y(PyObject *me, void *hunoz)
373{
374 ec_curve *c = ECPT_C(me);
375 ec *pp = ECPT_P(me);
376 PyObject *fobj = ECPT_FOBJ(me);
377 ec p = EC_INIT;
378 PyObject *rc;
379
380 if (EC_ATINF(pp)) RETURN_NONE;
381 EC_OUT(c, &p, pp);
382 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
383 EC_DESTROY(&p);
384 return (rc);
385}
386
387static PyObject *epget__x(PyObject *me, void *hunoz)
388{
389 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
390 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
391}
392
393static PyObject *epget__y(PyObject *me, void *hunoz)
394{
395 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
396 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
397}
398
399static PyObject *epget__z(PyObject *me, void *hunoz)
400{
401 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
402 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
403}
404
405static mp *coord_in(field *f, PyObject *x)
406{
407 mp *xx;
408 if (FE_PYCHECK(x) && FE_F(x) == f)
409 return (MP_COPY(FE_X(x)));
410 else if ((xx = getmp(x)) == 0)
411 return (0);
412 else
413 return (F_IN(f, xx, xx));
414}
415
416static int ecptxl_3(ec_curve *c, ec *p,
417 PyObject *x, PyObject *y, PyObject *z)
418{
419 int rc = -1;
420
421 if (!x || !y || !z) TYERR("missing argument");
422 if (!c) VALERR("internal form with no curve!");
2ee1ed30
MW		 423 if ((p->x = coord_in(c->f, x)) == 0 ||
424 (p->y = coord_in(c->f, y)) == 0 ||
425 (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
d7ab1bab 426 goto end;
427 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
428 rc = 0;
429end:
430 return (rc);
431}
432
433static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
434{
435 int rc = -1;
436
437 if (!x || !y) TYERR("missing argument");
438 if ((p->x = getmp(x)) == 0 ||
439 (p->y = getmp(y)) == 0)
440 goto end;
441 if (c) EC_IN(c, p, p);
442 rc = 0;
443end:
444 return (rc);
445}
446
447static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
448{
449 int rc = -1;
450 PyObject *y = 0, *z = 0, *t = 0;
451 mp *xx = 0;
452 const void *q;
453 int n;
454 qd_parse qd;
455
456 Py_XINCREF(x);
457 if (!x || x == Py_None)
458 /*cool*/;
459 else if (ECPT_PYCHECK(x)) {
460 getecptout(p, x);
461 goto fix;
462 } else if (PyString_Check(x)) {
463 if (PyObject_AsReadBuffer(x, &q, 0))
464 goto end;
465 qd.p = q;
466 qd.e = 0;
467 if (!ec_ptparse(&qd, p))
80f7cd89 468 VALERR(qd.e);
d7ab1bab 469 goto fix;
470 } else if (c && (xx = tomp(x)) != 0) {
471 xx = F_IN(c->f, xx, xx);
472 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
473 } else if (PySequence_Check(x)) {
474 t = x; x = 0;
475 n = PySequence_Size(t);
476 if (n != 2 && (n != 3 || !c))
477 TYERR("want sequence of two or three items");
478 if ((x = PySequence_GetItem(t, 0)) == 0 ||
479 (y = PySequence_GetItem(t, 1)) == 0 ||
480 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
481 goto end;
482 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
483 } else
484 TYERR("can't convert to curve point");
485 goto ok;
486
487fix:
488 if (c) EC_IN(c, p, p);
489ok:
490 rc = 0;
491end:
492 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
493 mp_drop(xx);
494 return (rc);
495}
496
497static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
498{
499 if (z)
500 return (ecptxl_3(c, p, x, y, z));
501 else if (y)
502 return (ecptxl_2(c, p, x, y));
503 else
504 return (ecptxl_1(c, p, x));
505}
506
d7ab1bab 507static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
508{
509 PyObject *x = 0, *y = 0, *z = 0;
510 ec p = EC_INIT;
511 char *kwlist[] = { "x", "y", 0 };
512
513 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", kwlist, &x, &y) ||
514 ecptxl(0, &p, x, y, z))
515 goto end;
516 return (ecpt_pywrapout(ty, &p));
517end:
518 EC_DESTROY(&p);
519 return (0);
520}
521
522static PyObject *ecpt_pyint(PyObject *me)
523{
524 ec p = EC_INIT;
525 long l;
526 PyObject *rc = 0;
527 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
528 getecptout(&p, me);
bc243788
MW		 529 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
530 else rc = mp_topylong(p.x);
d7ab1bab 531end:
532 EC_DESTROY(&p);
533 return (rc);
534}
535
536static PyObject *ecpt_pylong(PyObject *me)
537{
538 ec p = EC_INIT;
539 PyObject *rc = 0;
540 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
541 getecptout(&p, me);
f368b46e 542 rc = mp_topylong(p.x);
d7ab1bab 543end:
544 EC_DESTROY(&p);
545 return (rc);
546}
547
548static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
549{
550 PyObject *x = 0, *y = 0, *z = 0;
551 ec p = EC_INIT;
552 char *kwlist[] = { "x", "y", "z", 0 };
553
554 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", kwlist,
555 &x, &y, &z) ||
556 ecptxl(ECCURVE_C(ty), &p, x, y, z))
557 goto end;
558 return (ecpt_pywrap((PyObject *)ty, &p));
559end:
560 EC_DESTROY(&p);
561 return (0);
562}
563
564static PyGetSetDef ecptnc_pygetset[] = {
565#define GETSETNAME(op, name) epnc##op##_##name
566 GET (ix, "P.ix -> integer x coordinate of P")
567 GET (iy, "P.iy -> integer y coordinate of P")
568 GET (point, "P.point -> standalone curve point (no-op)")
569#undef GETSETNAME
570 { 0 }
571};
572
573static PyMethodDef ecptnc_pymethods[] = {
574#define METHNAME(func) epmeth_##func
575 METH (tobuf, "X.tobuf() -> BIN")
576#undef METHNAME
577 { 0 }
578};
579
580static PyNumberMethods ecpt_pynumber = {
581 0, /* @nb_add@ */
582 0, /* @nb_subtract@ */
583 0, /* @nb_multiply@ */
584 0, /* @nb_divide@ */
585 0, /* @nb_remainder@ */
586 0, /* @nb_divmod@ */
587 0, /* @nb_power@ */
588 0, /* @nb_negative@ */
589 0, /* @nb_positive@ */
590 0, /* @nb_absolute@ */
591 ecpt_pynonzerop, /* @nb_nonzero@ */
592 0, /* @nb_invert@ */
593 0, /* @nb_lshift@ */
594 0, /* @nb_rshift@ */
595 0, /* @nb_and@ */
596 0, /* @nb_xor@ */
597 0, /* @nb_or@ */
598 0, /* @nb_coerce@ */
599 ecpt_pyint, /* @nb_int@ */
600 ecpt_pylong, /* @nb_long@ */
601 0, /* @nb_float@ */
602 0, /* @nb_oct@ */
603 0, /* @nb_hex@ */
604
605 0, /* @nb_inplace_add@ */
606 0, /* @nb_inplace_subtract@ */
607 0, /* @nb_inplace_multiply@ */
608 0, /* @nb_inplace_divide@ */
609 0, /* @nb_inplace_remainder@ */
610 0, /* @nb_inplace_power@ */
611 0, /* @nb_inplace_lshift@ */
612 0, /* @nb_inplace_rshift@ */
613 0, /* @nb_inplace_and@ */
614 0, /* @nb_inplace_xor@ */
615 0, /* @nb_inplace_or@ */
616
617 0, /* @nb_floor_divide@ */
618 0, /* @nb_true_divide@ */
619 0, /* @nb_inplace_floor_divide@ */
620 0, /* @nb_inplace_true_divide@ */
621};
622
623static PyTypeObject ecpt_pytype_skel = {
6d4db0bf 624 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 625 "ECPt", /* @tp_name@ */
d7ab1bab 626 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
627 0, /* @tp_itemsize@ */
628
629 ecpt_pydealloc, /* @tp_dealloc@ */
630 0, /* @tp_print@ */
631 0, /* @tp_getattr@ */
632 0, /* @tp_setattr@ */
633 0, /* @tp_compare@ */
634 0, /* @tp_repr@ */
635 &ecpt_pynumber, /* @tp_as_number@ */
636 0, /* @tp_as_sequence@ */
637 0, /* @tp_as_mapping@ */
638 ecpt_pyhash, /* @tp_hash@ */
639 0, /* @tp_call@ */
640 0, /* @tp_str@ */
641 0, /* @tp_getattro@ */
642 0, /* @tp_setattro@ */
643 0, /* @tp_as_buffer@ */
644 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
645 Py_TPFLAGS_CHECKTYPES |
646 Py_TPFLAGS_BASETYPE,
647
648 /* @tp_doc@ */
649"Elliptic curve points, not associated with any curve.",
650
651 0, /* @tp_traverse@ */
652 0, /* @tp_clear@ */
653 ecpt_pyrichcompare, /* @tp_richcompare@ */
654 0, /* @tp_weaklistoffset@ */
655 0, /* @tp_iter@ */
963a6148 656 0, /* @tp_iternext@ */
d7ab1bab 657 ecptnc_pymethods, /* @tp_methods@ */
658 0, /* @tp_members@ */
659 ecptnc_pygetset, /* @tp_getset@ */
660 0, /* @tp_base@ */
661 0, /* @tp_dict@ */
662 0, /* @tp_descr_get@ */
663 0, /* @tp_descr_set@ */
664 0, /* @tp_dictoffset@ */
665 0, /* @tp_init@ */
666 PyType_GenericAlloc, /* @tp_alloc@ */
667 ecptnc_pynew, /* @tp_new@ */
3aa33042 668 0, /* @tp_free@ */
d7ab1bab 669 0 /* @tp_is_gc@ */
670};
671
672static PyGetSetDef ecpt_pygetset[] = {
673#define GETSETNAME(op, name) ep##op##_##name
674 GET (curve, "P.curve -> elliptic curve containing P")
675 GET (point, "P.point -> standalone curve point")
676 GET (x, "P.x -> Cartesian x coordinate of P")
677 GET (y, "P.y -> Cartesian y coordinate of P")
678 GET (_x, "P._x -> internal x coordinate of P")
679 GET (_y, "P._y -> internal y coordinate of P")
680 GET (_z, "P._z -> internal z coordinate of P, or None")
681#undef GETSETNAME
682 { 0 }
683};
684
685static PyMethodDef ecpt_pymethods[] = {
686#define METHNAME(func) epmeth_##func
687 METH (toraw, "X.toraw() -> BIN")
e12df5f3 688 KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
d7ab1bab 689 METH (dbl, "X.dbl() -> X + X")
3aa33042 690 METH (oncurvep, "X.oncurvep() -> BOOL")
d7ab1bab 691#undef METHNAME
692 { 0 }
693};
694
695static PyNumberMethods ecptcurve_pynumber = {
696 ecpt_pyadd, /* @nb_add@ */
697 ecpt_pysub, /* @nb_subtract@ */
698 ecpt_pymul, /* @nb_multiply@ */
699 0, /* @nb_divide@ */
700 0, /* @nb_remainder@ */
701 0, /* @nb_divmod@ */
702 0, /* @nb_power@ */
703 ecpt_pyneg, /* @nb_negative@ */
704 ecpt_pyid, /* @nb_positive@ */
705 0, /* @nb_absolute@ */
706 0, /* @nb_nonzero@ */
707 0, /* @nb_invert@ */
708 0, /* @nb_lshift@ */
709 0, /* @nb_rshift@ */
710 0, /* @nb_and@ */
711 0, /* @nb_xor@ */
712 0, /* @nb_or@ */
713 0, /* @nb_coerce@ */
714 0, /* @nb_int@ */
715 0, /* @nb_long@ */
716 0, /* @nb_float@ */
717 0, /* @nb_oct@ */
718 0, /* @nb_hex@ */
719
720 0, /* @nb_inplace_add@ */
721 0, /* @nb_inplace_subtract@ */
722 0, /* @nb_inplace_multiply@ */
723 0, /* @nb_inplace_divide@ */
724 0, /* @nb_inplace_remainder@ */
725 0, /* @nb_inplace_power@ */
726 0, /* @nb_inplace_lshift@ */
727 0, /* @nb_inplace_rshift@ */
728 0, /* @nb_inplace_and@ */
729 0, /* @nb_inplace_xor@ */
730 0, /* @nb_inplace_or@ */
731
732 0, /* @nb_floor_divide@ */
733 0, /* @nb_true_divide@ */
734 0, /* @nb_inplace_floor_divide@ */
735 0, /* @nb_inplace_true_divide@ */
736};
737
738static PyTypeObject ecptcurve_pytype_skel = {
6d4db0bf 739 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 740 "ECPtCurve", /* @tp_name@ */
d7ab1bab 741 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
742 0, /* @tp_itemsize@ */
743
744 ecpt_pydealloc, /* @tp_dealloc@ */
745 0, /* @tp_print@ */
746 0, /* @tp_getattr@ */
747 0, /* @tp_setattr@ */
748 0, /* @tp_compare@ */
749 0, /* @tp_repr@ */
750 &ecptcurve_pynumber, /* @tp_as_number@ */
751 0, /* @tp_as_sequence@ */
752 0, /* @tp_as_mapping@ */
753 0, /* @tp_hash@ */
754 0, /* @tp_call@ */
755 0, /* @tp_str@ */
756 0, /* @tp_getattro@ */
757 0, /* @tp_setattro@ */
758 0, /* @tp_as_buffer@ */
759 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
760 Py_TPFLAGS_CHECKTYPES |
761 Py_TPFLAGS_BASETYPE,
762
763 /* @tp_doc@ */
764"Elliptic curve points; abstract base class for points on given curves.",
765
766 0, /* @tp_traverse@ */
767 0, /* @tp_clear@ */
768 0, /* @tp_richcompare@ */
769 0, /* @tp_weaklistoffset@ */
770 0, /* @tp_iter@ */
963a6148 771 0, /* @tp_iternext@ */
d7ab1bab 772 ecpt_pymethods, /* @tp_methods@ */
773 0, /* @tp_members@ */
774 ecpt_pygetset, /* @tp_getset@ */
775 0, /* @tp_base@ */
776 0, /* @tp_dict@ */
777 0, /* @tp_descr_get@ */
778 0, /* @tp_descr_set@ */
779 0, /* @tp_dictoffset@ */
780 0, /* @tp_init@ */
781 PyType_GenericAlloc, /* @tp_alloc@ */
782 abstract_pynew, /* @tp_new@ */
3aa33042 783 0, /* @tp_free@ */
d7ab1bab 784 0 /* @tp_is_gc@ */
785};
786
787/*----- Elliptic curves themselves ----------------------------------------*/
788
789static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
790{
7f8c2476
MW		 791 int b;
792
793 assert(ECCURVE_PYCHECK(x));
794 if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
795 b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
d7ab1bab 796 switch (op) {
797 case Py_EQ: break;
2c1ccbae 798 case Py_NE: b = !b; break;
d7ab1bab 799 default: TYERR("can't order elliptic curves");
800 }
801 return (getbool(b));
802end:
803 return (0);
804}
805
806static PyObject *ecmmul_id(PyObject *me)
807 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
808
809static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
810{
811 ec_mulfactor *f = pp;
812
50bff227 813 EC_CREATE(&f->base);
d7ab1bab 814 if (getecpt(ECCURVE_C(me), &f->base, x) ||
815 (f->exp = getmp(m)) == 0)
816 return (-1);
d7ab1bab 817 return (0);
818}
819
820static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
821{
822 ec p = EC_INIT;
823 ec_immul(ECCURVE_C(me), &p, pp, n);
824 return (ecpt_pywrap(me, &p));
825}
826
827static void ecmmul_drop(void *pp)
828{
829 ec_mulfactor *f = pp;
830 EC_DESTROY(&f->base);
831 MP_DROP(f->exp);
832}
833
834static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
835{
836 return (mexp_common(me, arg, sizeof(ec_mulfactor),
837 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
838}
839
840static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
841{
842 char *p;
6b54260d 843 Py_ssize_t len;
d7ab1bab 844 buf b;
845 PyObject *rc = 0;
846 ec_curve *cc;
847 ec pp = EC_INIT;
848
849 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
850 return (0);
851 buf_init(&b, p, len);
852 cc = ECCURVE_C(me);
853 if (ec_getraw(cc, &b, &pp))
80f7cd89 854 VALERR("bad point");
d7ab1bab 855 EC_IN(cc, &pp, &pp);
856 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
857end:
858 return (rc);
859}
860
e12df5f3
MW		 861static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
862 PyObject *arg, PyObject *kw)
863{
864 char *p;
6b54260d 865 Py_ssize_t len;
e12df5f3
MW		 866 buf b;
867 PyObject *rc = 0;
868 ec_curve *cc;
869 int f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
870 ec pp = EC_INIT;
dc19440f 871 char *kwlist[] = { "class", "buf", "flags", 0 };
e12df5f3
MW		 872
873 if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|f:os2ecp", kwlist,
874 &me, &p, &len, &f))
875 return (0);
876 buf_init(&b, p, len);
877 cc = ECCURVE_C(me);
878 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
879 EC_IN(cc, &pp, &pp);
880 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
881end:
882 return (rc);
883}
884
d7ab1bab 885static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
886{
887 buf b;
888 char *p;
6b54260d 889 Py_ssize_t sz;
d7ab1bab 890 PyObject *rc = 0;
891 ec pp = EC_INIT;
892
893 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
894 buf_init(&b, p, sz);
895 if (buf_getec(&b, &pp)) VALERR("malformed data");
896 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
897 bytestring_pywrapbuf(&b));
898end:
899 return (rc);
900}
901
902static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
903{
904 char *p;
905 qd_parse qd;
906 PyObject *rc = 0;
907 ec pp = EC_INIT;
908
909 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
910 qd.p = p;
911 qd.e = 0;
80f7cd89 912 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
d7ab1bab 913 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
914end:
915 return (rc);
916}
917
918static void eccurve_pydealloc(PyObject *me)
919{
920 ec_destroycurve(ECCURVE_C(me));
921 Py_DECREF(ECCURVE_FOBJ(me));
922 PyType_Type.tp_dealloc(me);
923}
924
925static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
926{
927 PyObject *x;
928 mp *xx = 0;
929 ec p = EC_INIT;
930 PyObject *rc = 0;
931
932 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
933 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
934 xx = MP_COPY(FE_X(x));
935 else if ((xx = getmp(x)) == 0)
936 goto end;
937 else
938 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
939 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
940 VALERR("not on the curve");
941 rc = ecpt_pywrap(me, &p);
942end:
943 if (xx) MP_DROP(xx);
944 return (rc);
945}
946
947static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
948{
949 char *kwlist[] = { "rng", 0 };
950 grand *r = &rand_global;
951 ec p = EC_INIT;
952
953 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", kwlist,
954 convgrand, &r))
955 return (0);
956 ec_rand(ECCURVE_C(me), &p, r);
957 EC_IN(ECCURVE_C(me), &p, &p);
958 return (ecpt_pywrap(me, &p));
959}
960
961static PyObject *eccurve_dopywrap(PyTypeObject *ty,
962 PyObject *fobj, ec_curve *c)
963{
df9f8366 964 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 965 cobj->c = c;
966 cobj->fobj = fobj;
24b3d57b
MW		 967 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
968 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 969 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 970 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
971 Py_TPFLAGS_BASETYPE |
972 Py_TPFLAGS_CHECKTYPES |
973 Py_TPFLAGS_HEAPTYPE);
974 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
975 cobj->ty.ht_type.tp_free = 0;
976 cobj->ty.ht_type.tp_new = ecpt_pynew;
dc075750 977 typeready(&cobj->ty.ht_type);
d7ab1bab 978 return ((PyObject *)cobj);
979}
980
981PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
982{
983 PyTypeObject *ty;
984
985 if (!fobj)
986 fobj = field_pywrap(c->f);
987 else
988 Py_INCREF(fobj);
989 assert(FIELD_F(fobj) == c->f);
990 if (strcmp(EC_NAME(c), "prime") == 0)
991 ty = ecprimecurve_pytype;
992 else if (strcmp(EC_NAME(c), "primeproj") == 0)
993 ty = ecprimeprojcurve_pytype;
994 else if (strcmp(EC_NAME(c), "bin") == 0)
995 ty = ecbincurve_pytype;
996 else if (strcmp(EC_NAME(c), "binproj") == 0)
997 ty = ecbinprojcurve_pytype;
998 else
999 abort();
1000 return (eccurve_dopywrap(ty, fobj, c));
1001}
1002
1003static PyObject *eccurve_pynew(PyTypeObject *ty,
1004 ec_curve *(*make)(field *, mp *, mp *),
1005 PyObject *arg, PyObject *kw)
1006{
1007 PyObject *fobj;
1008 PyObject *cobj = 0;
1009 char *kwlist[] = { "field", "a", "b", 0 };
1010 mp *aa = 0, *bb = 0;
1011
5f959e50 1012 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", kwlist,
d7ab1bab 1013 field_pytype, &fobj,
1014 convmp, &aa, convmp, &bb))
1015 goto end;
1016 Py_INCREF(fobj);
1017 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1018end:
1019 if (aa) MP_DROP(aa);
1020 if (bb) MP_DROP(bb);
1021 return (cobj);
1022}
1023
1024static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
1025{
1026 char *p;
1027 qd_parse qd;
1028 ec_curve *c;
1029 PyObject *rc = 0;
1030
46e6ad89 1031 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
d7ab1bab 1032 goto end;
1033 qd.p = p;
1034 qd.e = 0;
1035 if ((c = ec_curveparse(&qd)) == 0)
80f7cd89 1036 VALERR(qd.e);
d7ab1bab 1037 rc = eccurve_pywrap(0, c);
1038end:
1039 return (rc);
1040}
1041
1042static PyObject *ecget_name(PyObject *me, void *hunoz)
1043 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1044
1045static PyObject *ecget_a(PyObject *me, void *hunoz)
1046 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1047
b2687a0a 1048static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 1049 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1050
1051static PyObject *ecget_field(PyObject *me, void *hunoz)
1052 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1053
1054static PyObject *ecget_inf(PyObject *me, void *hunoz)
1055 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1056
1057static PyGetSetDef eccurve_pygetset[] = {
1058#define GETSETNAME(op, name) ec##op##_##name
1059 GET (name, "E.name -> name of this kind of curve")
1060 GET (a, "E.a -> first parameter of curve")
1061 GET (b, "E.b -> second parameter of curve")
1062 GET (field, "E.field -> finite field containing this curve")
1063 GET (inf, "E.inf -> point at infinity of this curve")
1064#undef GETSETNAME
1065 { 0 }
b2687a0a 1066};
d7ab1bab 1067
1068static PyMethodDef eccurve_pymethods[] = {
1069#define METHNAME(name) ecmeth_##name
1070 METH (mmul, "\
1071E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1072 METH (find, "E.find(X) -> P")
1073 KWMETH(rand, "E.rand(rng = rand) ->P")
1074#undef METHNAME
1075 { 0 }
1076};
1077
1078static PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1079 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1080 "ECCurve", /* @tp_name@ */
d7ab1bab 1081 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1082 0, /* @tp_itemsize@ */
1083
1084 eccurve_pydealloc, /* @tp_dealloc@ */
1085 0, /* @tp_print@ */
1086 0, /* @tp_getattr@ */
1087 0, /* @tp_setattr@ */
1088 0, /* @tp_compare@ */
1089 0, /* @tp_repr@ */
1090 0, /* @tp_as_number@ */
1091 0, /* @tp_as_sequence@ */
1092 0, /* @tp_as_mapping@ */
1093 0, /* @tp_hash@ */
1094 0, /* @tp_call@ */
1095 0, /* @tp_str@ */
1096 0, /* @tp_getattro@ */
1097 0, /* @tp_setattro@ */
1098 0, /* @tp_as_buffer@ */
1099 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1100 Py_TPFLAGS_BASETYPE,
1101
1102 /* @tp_doc@ */
1103 "An elliptic curve. Abstract class.",
1104
1105 0, /* @tp_traverse@ */
1106 0, /* @tp_clear@ */
1107 eccurve_pyrichcompare, /* @tp_richcompare@ */
1108 0, /* @tp_weaklistoffset@ */
1109 0, /* @tp_iter@ */
963a6148 1110 0, /* @tp_iternext@ */
d7ab1bab 1111 eccurve_pymethods, /* @tp_methods@ */
1112 0, /* @tp_members@ */
1113 eccurve_pygetset, /* @tp_getset@ */
1114 0, /* @tp_base@ */
1115 0, /* @tp_dict@ */
1116 0, /* @tp_descr_get@ */
1117 0, /* @tp_descr_set@ */
1118 0, /* @tp_dictoffset@ */
1119 0, /* @tp_init@ */
1120 PyType_GenericAlloc, /* @tp_alloc@ */
1121 abstract_pynew, /* @tp_new@ */
3aa33042 1122 0, /* @tp_free@ */
d7ab1bab 1123 0 /* @tp_is_gc@ */
1124};
1125
1126static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1127 PyObject *arg, PyObject *kw)
1128{
1129 return (eccurve_pynew(ty, ec_prime, arg, kw));
1130}
1131
1132static PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1133 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1134 "ECPrimeCurve", /* @tp_name@ */
d7ab1bab 1135 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1136 0, /* @tp_itemsize@ */
1137
1138 eccurve_pydealloc, /* @tp_dealloc@ */
1139 0, /* @tp_print@ */
1140 0, /* @tp_getattr@ */
1141 0, /* @tp_setattr@ */
1142 0, /* @tp_compare@ */
1143 0, /* @tp_repr@ */
1144 0, /* @tp_as_number@ */
1145 0, /* @tp_as_sequence@ */
1146 0, /* @tp_as_mapping@ */
1147 0, /* @tp_hash@ */
1148 0, /* @tp_call@ */
1149 0, /* @tp_str@ */
1150 0, /* @tp_getattro@ */
1151 0, /* @tp_setattro@ */
1152 0, /* @tp_as_buffer@ */
1153 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1154 Py_TPFLAGS_BASETYPE,
1155
1156 /* @tp_doc@ */
1157 "An elliptic curve over a prime field. Use ecprimeprojcurve.",
1158
1159 0, /* @tp_traverse@ */
1160 0, /* @tp_clear@ */
1161 eccurve_pyrichcompare, /* @tp_richcompare@ */
1162 0, /* @tp_weaklistoffset@ */
1163 0, /* @tp_iter@ */
963a6148 1164 0, /* @tp_iternext@ */
d7ab1bab 1165 0, /* @tp_methods@ */
1166 0, /* @tp_members@ */
1167 0, /* @tp_getset@ */
1168 0, /* @tp_base@ */
1169 0, /* @tp_dict@ */
1170 0, /* @tp_descr_get@ */
1171 0, /* @tp_descr_set@ */
1172 0, /* @tp_dictoffset@ */
1173 0, /* @tp_init@ */
1174 PyType_GenericAlloc, /* @tp_alloc@ */
1175 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1176 0, /* @tp_free@ */
d7ab1bab 1177 0 /* @tp_is_gc@ */
1178};
1179
1180static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1181 PyObject *arg, PyObject *kw)
1182{
1183 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1184}
1185
1186static PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1187 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1188 "ECPrimeProjCurve", /* @tp_name@ */
d7ab1bab 1189 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1190 0, /* @tp_itemsize@ */
1191
1192 eccurve_pydealloc, /* @tp_dealloc@ */
1193 0, /* @tp_print@ */
1194 0, /* @tp_getattr@ */
1195 0, /* @tp_setattr@ */
1196 0, /* @tp_compare@ */
1197 0, /* @tp_repr@ */
1198 0, /* @tp_as_number@ */
1199 0, /* @tp_as_sequence@ */
1200 0, /* @tp_as_mapping@ */
1201 0, /* @tp_hash@ */
1202 0, /* @tp_call@ */
1203 0, /* @tp_str@ */
1204 0, /* @tp_getattro@ */
1205 0, /* @tp_setattro@ */
1206 0, /* @tp_as_buffer@ */
1207 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1208 Py_TPFLAGS_BASETYPE,
1209
1210 /* @tp_doc@ */
1211 "An elliptic curve over a prime field, using projective coordinates.",
1212
1213 0, /* @tp_traverse@ */
1214 0, /* @tp_clear@ */
1215 eccurve_pyrichcompare, /* @tp_richcompare@ */
1216 0, /* @tp_weaklistoffset@ */
1217 0, /* @tp_iter@ */
963a6148 1218 0, /* @tp_iternext@ */
d7ab1bab 1219 0, /* @tp_methods@ */
1220 0, /* @tp_members@ */
1221 0, /* @tp_getset@ */
1222 0, /* @tp_base@ */
1223 0, /* @tp_dict@ */
1224 0, /* @tp_descr_get@ */
1225 0, /* @tp_descr_set@ */
1226 0, /* @tp_dictoffset@ */
1227 0, /* @tp_init@ */
1228 PyType_GenericAlloc, /* @tp_alloc@ */
1229 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1230 0, /* @tp_free@ */
d7ab1bab 1231 0 /* @tp_is_gc@ */
1232};
1233
1234static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1235 PyObject *arg, PyObject *kw)
1236{
1237 return (eccurve_pynew(ty, ec_bin, arg, kw));
1238}
1239
1240static PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1241 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1242 "ECBinCurve", /* @tp_name@ */
d7ab1bab 1243 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1244 0, /* @tp_itemsize@ */
1245
1246 eccurve_pydealloc, /* @tp_dealloc@ */
1247 0, /* @tp_print@ */
1248 0, /* @tp_getattr@ */
1249 0, /* @tp_setattr@ */
1250 0, /* @tp_compare@ */
1251 0, /* @tp_repr@ */
1252 0, /* @tp_as_number@ */
1253 0, /* @tp_as_sequence@ */
1254 0, /* @tp_as_mapping@ */
1255 0, /* @tp_hash@ */
1256 0, /* @tp_call@ */
1257 0, /* @tp_str@ */
1258 0, /* @tp_getattro@ */
1259 0, /* @tp_setattro@ */
1260 0, /* @tp_as_buffer@ */
1261 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1262 Py_TPFLAGS_BASETYPE,
1263
1264 /* @tp_doc@ */
1265 "An elliptic curve over a binary field. Use ecbinprojcurve.",
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@ */
1319 "An elliptic curve over a binary field, using projective coordinates.",
1320
1321 0, /* @tp_traverse@ */
1322 0, /* @tp_clear@ */
1323 eccurve_pyrichcompare, /* @tp_richcompare@ */
1324 0, /* @tp_weaklistoffset@ */
1325 0, /* @tp_iter@ */
963a6148 1326 0, /* @tp_iternext@ */
d7ab1bab 1327 0, /* @tp_methods@ */
1328 0, /* @tp_members@ */
1329 0, /* @tp_getset@ */
1330 0, /* @tp_base@ */
1331 0, /* @tp_dict@ */
1332 0, /* @tp_descr_get@ */
1333 0, /* @tp_descr_set@ */
1334 0, /* @tp_dictoffset@ */
1335 0, /* @tp_init@ */
1336 PyType_GenericAlloc, /* @tp_alloc@ */
1337 ecbinprojcurve_pynew, /* @tp_new@ */
3aa33042 1338 0, /* @tp_free@ */
d7ab1bab 1339 0 /* @tp_is_gc@ */
1340};
1341
1342/*----- Curve info --------------------------------------------------------*/
1343
1344static int ncurves = -1;
1345
1346void ecinfo_copy(ec_info *eic, const ec_info *ei)
1347{
1348 eic->c = eccurve_copy(ei->c);
1349 EC_CREATE(&eic->g);
1350 EC_COPY(&eic->g, &ei->g);
1351 eic->r = MP_COPY(ei->r);
1352 eic->h = MP_COPY(ei->h);
1353}
1354
1355PyObject *ecinfo_pywrap(ec_info *ei)
1356{
1357 ecinfo_pyobj *o;
1358
1359 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1360 o->ei = *ei;
1361 o->cobj = eccurve_pywrap(0, o->ei.c);
1362 Py_INCREF(o->cobj);
1363 return ((PyObject *)o);
1364}
1365
1366static void ecinfo_pydealloc(PyObject *me)
1367{
1368 ec_info *ei = ECINFO_EI(me);
1369 EC_DESTROY(&ei->g);
1370 MP_DROP(ei->r);
1371 MP_DROP(ei->h);
1372 Py_DECREF(ECINFO_COBJ(me));
3aa33042 1373 FREEOBJ(me);
d7ab1bab 1374}
1375
1376static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1377{
1378 ec_info ei = { 0 };
1379 PyObject *e, *g;
1380 char *kwlist[] = { "curve", "G", "r", "h", 0 };
1381 ecinfo_pyobj *rc = 0;
1382
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))
1386 goto end;
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);
1390 EC_CREATE(&ei.g);
30720615 1391 EC_OUT(ei.c, &ei.g, ECPT_P(g));
d7ab1bab 1392 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1393 rc->ei = ei;
1394 rc->cobj = e;
1395 Py_INCREF(rc->cobj);
1396 return ((PyObject *)rc);
1397
1398end:
1399 mp_drop(ei.r);
1400 mp_drop(ei.h);
1401 return (0);
1402}
1403
1404static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
1405{
1406 char *p;
1407 qd_parse qd;
1408 ec_info ei;
1409 PyObject *rc = 0;
1410
1411 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1412 goto end;
1413 qd.p = p;
1414 qd.e = 0;
1415 if (ec_infoparse(&qd, &ei))
80f7cd89 1416 VALERR(qd.e);
d7ab1bab 1417 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1418end:
1419 return (rc);
1420}
1421
1422static PyObject *meth__ECInfo__curven(PyObject *me, PyObject *arg)
1423{
1424 int i;
1425 ec_info ei;
1426 PyObject *rc = 0;
1427
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);
1432end:
1433 return (rc);
1434}
1435
1436static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1437{
1438 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1439 switch (op) {
1440 case Py_EQ: break;
1441 case Py_NE: b = !b;
1442 default: TYERR("can't order elliptic curve infos");
1443 }
1444 return (getbool(b));
1445end:
1446 return (0);
1447}
1448
1449static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1450{
1451 char *kwlist[] = { "rng", 0 };
1452 grand *r = &rand_global;
1453 const char *p;
1454
1455 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", kwlist,
1456 convgrand, &r))
1457 goto end;
1458 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1459 VALERR(p);
1460 RETURN_ME;
1461end:
1462 return (0);
1463}
1464
1465static PyObject *eiget_curve(PyObject *me, void *hunoz)
1466 { RETURN_OBJ(ECINFO_COBJ(me)); }
1467
1468static PyObject *eiget_G(PyObject *me, void *hunoz)
1469{
1470 ec_info *ei = ECINFO_EI(me);
1471 ec p = EC_INIT;
1472 EC_IN(ei->c, &p, &ei->g);
1473 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1474}
1475
1476static PyObject *eiget_r(PyObject *me, void *hunoz)
1477 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1478
1479static PyObject *eiget_h(PyObject *me, void *hunoz)
1480 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1481
1482static 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")
1488#undef GETSETNAME
1489 { 0 }
1490};
1491
1492static PyMethodDef ecinfo_pymethods[] = {
1493#define METHNAME(name) eimeth_##name
1494 KWMETH(check, "I.check() -> None")
1495#undef METHNAME
1496 { 0 }
1497};
1498
1499static PyTypeObject ecinfo_pytype_skel = {
6d4db0bf 1500 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1501 "ECInfo", /* @tp_name@ */
d7ab1bab 1502 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1503 0, /* @tp_itemsize@ */
1504
1505 ecinfo_pydealloc, /* @tp_dealloc@ */
1506 0, /* @tp_print@ */
1507 0, /* @tp_getattr@ */
1508 0, /* @tp_setattr@ */
1509 0, /* @tp_compare@ */
1510 0, /* @tp_repr@ */
1511 0, /* @tp_as_number@ */
1512 0, /* @tp_as_sequence@ */
1513 0, /* @tp_as_mapping@ */
1514 0, /* @tp_hash@ */
1515 0, /* @tp_call@ */
1516 0, /* @tp_str@ */
1517 0, /* @tp_getattro@ */
1518 0, /* @tp_setattro@ */
1519 0, /* @tp_as_buffer@ */
1520 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1521 Py_TPFLAGS_BASETYPE,
1522
1523 /* @tp_doc@ */
1524 "Elliptic curve domain parameters.",
1525
1526 0, /* @tp_traverse@ */
1527 0, /* @tp_clear@ */
1528 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1529 0, /* @tp_weaklistoffset@ */
1530 0, /* @tp_iter@ */
963a6148 1531 0, /* @tp_iternext@ */
d7ab1bab 1532 ecinfo_pymethods, /* @tp_methods@ */
1533 0, /* @tp_members@ */
1534 ecinfo_pygetset, /* @tp_getset@ */
1535 0, /* @tp_base@ */
1536 0, /* @tp_dict@ */
1537 0, /* @tp_descr_get@ */
1538 0, /* @tp_descr_set@ */
1539 0, /* @tp_dictoffset@ */
1540 0, /* @tp_init@ */
1541 PyType_GenericAlloc, /* @tp_alloc@ */
1542 ecinfo_pynew, /* @tp_new@ */
3aa33042 1543 0, /* @tp_free@ */
d7ab1bab 1544 0 /* @tp_is_gc@ */
1545};
1546
1547/*----- Setup -------------------------------------------------------------*/
1548
1549static PyMethodDef methods[] = {
1550#define METHNAME(func) meth_##func
b2687a0a
MW		 1551 METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
1552 METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
e12df5f3 1553 KWMETH(_ECPtCurve_os2ecp, "os2ecp(E, STR, [flags = ...]) -> (P, REST)")
b2687a0a
MW		 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")
d7ab1bab 1558#undef METHNAME
1559 { 0 }
1560};
1561
1562void ec_pyinit(void)
1563{
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);
1573}
1574
1575static PyObject *namedcurves(void)
1576{
1577 int i, j;
1578 const char *p;
1579 PyObject *d, *c;
1580
1581 d = PyDict_New();
1582 for (i = 0; ectab[i].name; i++) {
1583 p = ectab[i].name;
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);
1587 Py_INCREF(c);
1588 goto found;
1589 }
1590 }
1591 c = PyInt_FromLong(i);
1592 found:
98963817 1593 PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
d7ab1bab 1594 Py_DECREF(c);
1595 }
1596 ncurves = i;
1597 return (d);
1598}
1599
1600void ec_pyinsert(PyObject *mod)
1601{
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());
1611}
1612
1613/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings