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field.c, mp.c: Hash `GF' and `FE' objects the same as `MP'.
[catacomb-python] / ec.c
CommitLineData
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;
c8b711c4 301 unsigned f = EC_EXPLY;
e12df5f3
MW		 302 int len;
303 char *kwlist[] = { "flags", 0 };
304
c8b711c4
MW		 305 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:ec2osp", kwlist,
306 convuint, &f))
e12df5f3
MW		 307 return (0);
308 len = c->f->noctets * 2 + 1;
309 rc = bytestring_pywrap(0, len);
310 p = PyString_AS_STRING(rc);
311 buf_init(&b, p, len);
312 EC_OUT(c, &pp, ECPT_P(me));
313 if (ec_ec2osp(c, f, &b, &pp)) {
314 Py_DECREF(rc); rc = 0;
315 VALERR("invalid flags");
316 }
317 EC_DESTROY(&pp);
318 _PyString_Resize(&rc, BLEN(&b));
319end:
320 return (rc);
321}
322
d7ab1bab 323static PyObject *epget_curve(PyObject *me, void *hunoz)
324 { RETURN_OBJ(ECPT_COBJ(me)); }
325
326static PyObject *epncget_ix(PyObject *me, void *hunoz)
327{
328 ec p = EC_INIT;
329 PyObject *rc;
330 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
331 getecptout(&p, me);
332 rc = mp_pywrap(MP_COPY(p.x));
333 EC_DESTROY(&p);
334 return (rc);
335}
336
337static PyObject *epncget_iy(PyObject *me, void *hunoz)
338{
339 ec p = EC_INIT;
340 PyObject *rc;
341 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
342 getecptout(&p, me);
343 rc = mp_pywrap(MP_COPY(p.y));
344 EC_DESTROY(&p);
345 return (rc);
346}
347
348static PyObject *epncget_point(PyObject *me, void *hunoz)
349 { RETURN_ME; }
350
351static PyObject *epget_point(PyObject *me, void *hunoz)
352{
353 ec p = EC_INIT;
354 getecptout(&p, me);
355 return (ecpt_pywrapout(ecpt_pytype, &p));
356}
357
358static PyObject *epget_x(PyObject *me, void *hunoz)
359{
360 ec_curve *c = ECPT_C(me);
361 ec *pp = ECPT_P(me);
362 PyObject *fobj = ECPT_FOBJ(me);
363 ec p = EC_INIT;
364 PyObject *rc;
365
366 if (EC_ATINF(pp)) RETURN_NONE;
367 EC_OUT(c, &p, pp);
368 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
369 EC_DESTROY(&p);
370 return (rc);
371}
372
373static PyObject *epget_y(PyObject *me, void *hunoz)
374{
375 ec_curve *c = ECPT_C(me);
376 ec *pp = ECPT_P(me);
377 PyObject *fobj = ECPT_FOBJ(me);
378 ec p = EC_INIT;
379 PyObject *rc;
380
381 if (EC_ATINF(pp)) RETURN_NONE;
382 EC_OUT(c, &p, pp);
383 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
384 EC_DESTROY(&p);
385 return (rc);
386}
387
388static PyObject *epget__x(PyObject *me, void *hunoz)
389{
390 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
391 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
392}
393
394static PyObject *epget__y(PyObject *me, void *hunoz)
395{
396 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
397 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
398}
399
400static PyObject *epget__z(PyObject *me, void *hunoz)
401{
402 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
403 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
404}
405
406static mp *coord_in(field *f, PyObject *x)
407{
408 mp *xx;
409 if (FE_PYCHECK(x) && FE_F(x) == f)
410 return (MP_COPY(FE_X(x)));
411 else if ((xx = getmp(x)) == 0)
412 return (0);
413 else
414 return (F_IN(f, xx, xx));
415}
416
417static int ecptxl_3(ec_curve *c, ec *p,
418 PyObject *x, PyObject *y, PyObject *z)
419{
420 int rc = -1;
421
422 if (!x || !y || !z) TYERR("missing argument");
423 if (!c) VALERR("internal form with no curve!");
2ee1ed30
MW		 424 if ((p->x = coord_in(c->f, x)) == 0 ||
425 (p->y = coord_in(c->f, y)) == 0 ||
426 (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
d7ab1bab 427 goto end;
428 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
429 rc = 0;
430end:
431 return (rc);
432}
433
434static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
435{
436 int rc = -1;
437
438 if (!x || !y) TYERR("missing argument");
439 if ((p->x = getmp(x)) == 0 ||
440 (p->y = getmp(y)) == 0)
441 goto end;
442 if (c) EC_IN(c, p, p);
443 rc = 0;
444end:
445 return (rc);
446}
447
448static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
449{
450 int rc = -1;
451 PyObject *y = 0, *z = 0, *t = 0;
452 mp *xx = 0;
453 const void *q;
454 int n;
455 qd_parse qd;
456
457 Py_XINCREF(x);
458 if (!x || x == Py_None)
459 /*cool*/;
460 else if (ECPT_PYCHECK(x)) {
461 getecptout(p, x);
462 goto fix;
463 } else if (PyString_Check(x)) {
464 if (PyObject_AsReadBuffer(x, &q, 0))
465 goto end;
466 qd.p = q;
467 qd.e = 0;
468 if (!ec_ptparse(&qd, p))
80f7cd89 469 VALERR(qd.e);
d7ab1bab 470 goto fix;
471 } else if (c && (xx = tomp(x)) != 0) {
472 xx = F_IN(c->f, xx, xx);
473 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
474 } else if (PySequence_Check(x)) {
475 t = x; x = 0;
476 n = PySequence_Size(t);
477 if (n != 2 && (n != 3 || !c))
478 TYERR("want sequence of two or three items");
479 if ((x = PySequence_GetItem(t, 0)) == 0 ||
480 (y = PySequence_GetItem(t, 1)) == 0 ||
481 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
482 goto end;
483 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
484 } else
485 TYERR("can't convert to curve point");
486 goto ok;
487
488fix:
489 if (c) EC_IN(c, p, p);
490ok:
491 rc = 0;
492end:
493 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
494 mp_drop(xx);
495 return (rc);
496}
497
498static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
499{
500 if (z)
501 return (ecptxl_3(c, p, x, y, z));
502 else if (y)
503 return (ecptxl_2(c, p, x, y));
504 else
505 return (ecptxl_1(c, p, x));
506}
507
d7ab1bab 508static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
509{
510 PyObject *x = 0, *y = 0, *z = 0;
511 ec p = EC_INIT;
512 char *kwlist[] = { "x", "y", 0 };
513
514 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", kwlist, &x, &y) ||
515 ecptxl(0, &p, x, y, z))
516 goto end;
517 return (ecpt_pywrapout(ty, &p));
518end:
519 EC_DESTROY(&p);
520 return (0);
521}
522
523static PyObject *ecpt_pyint(PyObject *me)
524{
525 ec p = EC_INIT;
526 long l;
527 PyObject *rc = 0;
528 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
529 getecptout(&p, me);
bc243788
MW		 530 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
531 else rc = mp_topylong(p.x);
d7ab1bab 532end:
533 EC_DESTROY(&p);
534 return (rc);
535}
536
537static PyObject *ecpt_pylong(PyObject *me)
538{
539 ec p = EC_INIT;
540 PyObject *rc = 0;
541 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
542 getecptout(&p, me);
f368b46e 543 rc = mp_topylong(p.x);
d7ab1bab 544end:
545 EC_DESTROY(&p);
546 return (rc);
547}
548
549static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
550{
551 PyObject *x = 0, *y = 0, *z = 0;
552 ec p = EC_INIT;
553 char *kwlist[] = { "x", "y", "z", 0 };
554
555 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", kwlist,
556 &x, &y, &z) ||
557 ecptxl(ECCURVE_C(ty), &p, x, y, z))
558 goto end;
559 return (ecpt_pywrap((PyObject *)ty, &p));
560end:
561 EC_DESTROY(&p);
562 return (0);
563}
564
565static PyGetSetDef ecptnc_pygetset[] = {
566#define GETSETNAME(op, name) epnc##op##_##name
567 GET (ix, "P.ix -> integer x coordinate of P")
568 GET (iy, "P.iy -> integer y coordinate of P")
569 GET (point, "P.point -> standalone curve point (no-op)")
570#undef GETSETNAME
571 { 0 }
572};
573
574static PyMethodDef ecptnc_pymethods[] = {
575#define METHNAME(func) epmeth_##func
576 METH (tobuf, "X.tobuf() -> BIN")
577#undef METHNAME
578 { 0 }
579};
580
581static PyNumberMethods ecpt_pynumber = {
582 0, /* @nb_add@ */
583 0, /* @nb_subtract@ */
584 0, /* @nb_multiply@ */
585 0, /* @nb_divide@ */
586 0, /* @nb_remainder@ */
587 0, /* @nb_divmod@ */
588 0, /* @nb_power@ */
589 0, /* @nb_negative@ */
590 0, /* @nb_positive@ */
591 0, /* @nb_absolute@ */
592 ecpt_pynonzerop, /* @nb_nonzero@ */
593 0, /* @nb_invert@ */
594 0, /* @nb_lshift@ */
595 0, /* @nb_rshift@ */
596 0, /* @nb_and@ */
597 0, /* @nb_xor@ */
598 0, /* @nb_or@ */
599 0, /* @nb_coerce@ */
600 ecpt_pyint, /* @nb_int@ */
601 ecpt_pylong, /* @nb_long@ */
602 0, /* @nb_float@ */
603 0, /* @nb_oct@ */
604 0, /* @nb_hex@ */
605
606 0, /* @nb_inplace_add@ */
607 0, /* @nb_inplace_subtract@ */
608 0, /* @nb_inplace_multiply@ */
609 0, /* @nb_inplace_divide@ */
610 0, /* @nb_inplace_remainder@ */
611 0, /* @nb_inplace_power@ */
612 0, /* @nb_inplace_lshift@ */
613 0, /* @nb_inplace_rshift@ */
614 0, /* @nb_inplace_and@ */
615 0, /* @nb_inplace_xor@ */
616 0, /* @nb_inplace_or@ */
617
618 0, /* @nb_floor_divide@ */
619 0, /* @nb_true_divide@ */
620 0, /* @nb_inplace_floor_divide@ */
621 0, /* @nb_inplace_true_divide@ */
622};
623
624static PyTypeObject ecpt_pytype_skel = {
6d4db0bf 625 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 626 "ECPt", /* @tp_name@ */
d7ab1bab 627 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
628 0, /* @tp_itemsize@ */
629
630 ecpt_pydealloc, /* @tp_dealloc@ */
631 0, /* @tp_print@ */
632 0, /* @tp_getattr@ */
633 0, /* @tp_setattr@ */
634 0, /* @tp_compare@ */
635 0, /* @tp_repr@ */
636 &ecpt_pynumber, /* @tp_as_number@ */
637 0, /* @tp_as_sequence@ */
638 0, /* @tp_as_mapping@ */
639 ecpt_pyhash, /* @tp_hash@ */
640 0, /* @tp_call@ */
641 0, /* @tp_str@ */
642 0, /* @tp_getattro@ */
643 0, /* @tp_setattro@ */
644 0, /* @tp_as_buffer@ */
645 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
646 Py_TPFLAGS_CHECKTYPES |
647 Py_TPFLAGS_BASETYPE,
648
649 /* @tp_doc@ */
650"Elliptic curve points, not associated with any curve.",
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{
7f8c2476
MW		 792 int b;
793
794 assert(ECCURVE_PYCHECK(x));
795 if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
796 b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
d7ab1bab 797 switch (op) {
798 case Py_EQ: break;
2c1ccbae 799 case Py_NE: b = !b; break;
d7ab1bab 800 default: TYERR("can't order elliptic curves");
801 }
802 return (getbool(b));
803end:
804 return (0);
805}
806
807static PyObject *ecmmul_id(PyObject *me)
808 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
809
810static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
811{
812 ec_mulfactor *f = pp;
813
50bff227 814 EC_CREATE(&f->base);
d7ab1bab 815 if (getecpt(ECCURVE_C(me), &f->base, x) ||
816 (f->exp = getmp(m)) == 0)
817 return (-1);
d7ab1bab 818 return (0);
819}
820
821static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
822{
823 ec p = EC_INIT;
824 ec_immul(ECCURVE_C(me), &p, pp, n);
825 return (ecpt_pywrap(me, &p));
826}
827
828static void ecmmul_drop(void *pp)
829{
830 ec_mulfactor *f = pp;
831 EC_DESTROY(&f->base);
832 MP_DROP(f->exp);
833}
834
835static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
836{
837 return (mexp_common(me, arg, sizeof(ec_mulfactor),
838 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
839}
840
841static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
842{
843 char *p;
6b54260d 844 Py_ssize_t len;
d7ab1bab 845 buf b;
846 PyObject *rc = 0;
847 ec_curve *cc;
848 ec pp = EC_INIT;
849
850 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
851 return (0);
852 buf_init(&b, p, len);
853 cc = ECCURVE_C(me);
854 if (ec_getraw(cc, &b, &pp))
80f7cd89 855 VALERR("bad point");
d7ab1bab 856 EC_IN(cc, &pp, &pp);
857 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
858end:
859 return (rc);
860}
861
e12df5f3
MW		 862static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
863 PyObject *arg, PyObject *kw)
864{
865 char *p;
6b54260d 866 Py_ssize_t len;
e12df5f3
MW		 867 buf b;
868 PyObject *rc = 0;
869 ec_curve *cc;
c8b711c4 870 unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
e12df5f3 871 ec pp = EC_INIT;
dc19440f 872 char *kwlist[] = { "class", "buf", "flags", 0 };
e12df5f3 873
c8b711c4
MW		 874 if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|O&:os2ecp", kwlist,
875 &me, &p, &len, convuint, &f))
e12df5f3
MW		 876 return (0);
877 buf_init(&b, p, len);
878 cc = ECCURVE_C(me);
879 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
880 EC_IN(cc, &pp, &pp);
881 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
882end:
883 return (rc);
884}
885
d7ab1bab 886static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
887{
888 buf b;
889 char *p;
6b54260d 890 Py_ssize_t sz;
d7ab1bab 891 PyObject *rc = 0;
892 ec pp = EC_INIT;
893
894 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
895 buf_init(&b, p, sz);
896 if (buf_getec(&b, &pp)) VALERR("malformed data");
897 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
898 bytestring_pywrapbuf(&b));
899end:
900 return (rc);
901}
902
903static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
904{
905 char *p;
906 qd_parse qd;
907 PyObject *rc = 0;
908 ec pp = EC_INIT;
909
910 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
911 qd.p = p;
912 qd.e = 0;
80f7cd89 913 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
d7ab1bab 914 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
915end:
916 return (rc);
917}
918
919static void eccurve_pydealloc(PyObject *me)
920{
921 ec_destroycurve(ECCURVE_C(me));
922 Py_DECREF(ECCURVE_FOBJ(me));
923 PyType_Type.tp_dealloc(me);
924}
925
926static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
927{
928 PyObject *x;
929 mp *xx = 0;
930 ec p = EC_INIT;
931 PyObject *rc = 0;
932
933 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
934 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
935 xx = MP_COPY(FE_X(x));
936 else if ((xx = getmp(x)) == 0)
937 goto end;
938 else
939 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
940 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
941 VALERR("not on the curve");
942 rc = ecpt_pywrap(me, &p);
943end:
944 if (xx) MP_DROP(xx);
945 return (rc);
946}
947
948static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
949{
950 char *kwlist[] = { "rng", 0 };
951 grand *r = &rand_global;
952 ec p = EC_INIT;
953
954 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", kwlist,
955 convgrand, &r))
956 return (0);
957 ec_rand(ECCURVE_C(me), &p, r);
958 EC_IN(ECCURVE_C(me), &p, &p);
959 return (ecpt_pywrap(me, &p));
960}
961
962static PyObject *eccurve_dopywrap(PyTypeObject *ty,
963 PyObject *fobj, ec_curve *c)
964{
df9f8366 965 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 966 cobj->c = c;
967 cobj->fobj = fobj;
24b3d57b
MW		 968 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
969 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 970 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 971 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
972 Py_TPFLAGS_BASETYPE |
973 Py_TPFLAGS_CHECKTYPES |
974 Py_TPFLAGS_HEAPTYPE);
975 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
976 cobj->ty.ht_type.tp_free = 0;
977 cobj->ty.ht_type.tp_new = ecpt_pynew;
dc075750 978 typeready(&cobj->ty.ht_type);
d7ab1bab 979 return ((PyObject *)cobj);
980}
981
982PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
983{
984 PyTypeObject *ty;
985
986 if (!fobj)
987 fobj = field_pywrap(c->f);
988 else
989 Py_INCREF(fobj);
990 assert(FIELD_F(fobj) == c->f);
991 if (strcmp(EC_NAME(c), "prime") == 0)
992 ty = ecprimecurve_pytype;
993 else if (strcmp(EC_NAME(c), "primeproj") == 0)
994 ty = ecprimeprojcurve_pytype;
995 else if (strcmp(EC_NAME(c), "bin") == 0)
996 ty = ecbincurve_pytype;
997 else if (strcmp(EC_NAME(c), "binproj") == 0)
998 ty = ecbinprojcurve_pytype;
999 else
1000 abort();
1001 return (eccurve_dopywrap(ty, fobj, c));
1002}
1003
1004static PyObject *eccurve_pynew(PyTypeObject *ty,
1005 ec_curve *(*make)(field *, mp *, mp *),
1006 PyObject *arg, PyObject *kw)
1007{
1008 PyObject *fobj;
1009 PyObject *cobj = 0;
1010 char *kwlist[] = { "field", "a", "b", 0 };
1011 mp *aa = 0, *bb = 0;
1012
5f959e50 1013 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", kwlist,
d7ab1bab 1014 field_pytype, &fobj,
1015 convmp, &aa, convmp, &bb))
1016 goto end;
1017 Py_INCREF(fobj);
1018 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1019end:
1020 if (aa) MP_DROP(aa);
1021 if (bb) MP_DROP(bb);
1022 return (cobj);
1023}
1024
1025static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
1026{
1027 char *p;
1028 qd_parse qd;
1029 ec_curve *c;
1030 PyObject *rc = 0;
1031
46e6ad89 1032 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
d7ab1bab 1033 goto end;
1034 qd.p = p;
1035 qd.e = 0;
1036 if ((c = ec_curveparse(&qd)) == 0)
80f7cd89 1037 VALERR(qd.e);
d7ab1bab 1038 rc = eccurve_pywrap(0, c);
1039end:
1040 return (rc);
1041}
1042
1043static PyObject *ecget_name(PyObject *me, void *hunoz)
1044 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1045
1046static PyObject *ecget_a(PyObject *me, void *hunoz)
1047 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1048
b2687a0a 1049static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 1050 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1051
1052static PyObject *ecget_field(PyObject *me, void *hunoz)
1053 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1054
1055static PyObject *ecget_inf(PyObject *me, void *hunoz)
1056 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1057
1058static PyGetSetDef eccurve_pygetset[] = {
1059#define GETSETNAME(op, name) ec##op##_##name
1060 GET (name, "E.name -> name of this kind of curve")
1061 GET (a, "E.a -> first parameter of curve")
1062 GET (b, "E.b -> second parameter of curve")
1063 GET (field, "E.field -> finite field containing this curve")
1064 GET (inf, "E.inf -> point at infinity of this curve")
1065#undef GETSETNAME
1066 { 0 }
b2687a0a 1067};
d7ab1bab 1068
1069static PyMethodDef eccurve_pymethods[] = {
1070#define METHNAME(name) ecmeth_##name
1071 METH (mmul, "\
1072E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1073 METH (find, "E.find(X) -> P")
1074 KWMETH(rand, "E.rand(rng = rand) ->P")
1075#undef METHNAME
1076 { 0 }
1077};
1078
1079static PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1080 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1081 "ECCurve", /* @tp_name@ */
d7ab1bab 1082 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1083 0, /* @tp_itemsize@ */
1084
1085 eccurve_pydealloc, /* @tp_dealloc@ */
1086 0, /* @tp_print@ */
1087 0, /* @tp_getattr@ */
1088 0, /* @tp_setattr@ */
1089 0, /* @tp_compare@ */
1090 0, /* @tp_repr@ */
1091 0, /* @tp_as_number@ */
1092 0, /* @tp_as_sequence@ */
1093 0, /* @tp_as_mapping@ */
1094 0, /* @tp_hash@ */
1095 0, /* @tp_call@ */
1096 0, /* @tp_str@ */
1097 0, /* @tp_getattro@ */
1098 0, /* @tp_setattro@ */
1099 0, /* @tp_as_buffer@ */
1100 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1101 Py_TPFLAGS_BASETYPE,
1102
1103 /* @tp_doc@ */
1104 "An elliptic curve. Abstract class.",
1105
1106 0, /* @tp_traverse@ */
1107 0, /* @tp_clear@ */
1108 eccurve_pyrichcompare, /* @tp_richcompare@ */
1109 0, /* @tp_weaklistoffset@ */
1110 0, /* @tp_iter@ */
963a6148 1111 0, /* @tp_iternext@ */
d7ab1bab 1112 eccurve_pymethods, /* @tp_methods@ */
1113 0, /* @tp_members@ */
1114 eccurve_pygetset, /* @tp_getset@ */
1115 0, /* @tp_base@ */
1116 0, /* @tp_dict@ */
1117 0, /* @tp_descr_get@ */
1118 0, /* @tp_descr_set@ */
1119 0, /* @tp_dictoffset@ */
1120 0, /* @tp_init@ */
1121 PyType_GenericAlloc, /* @tp_alloc@ */
1122 abstract_pynew, /* @tp_new@ */
3aa33042 1123 0, /* @tp_free@ */
d7ab1bab 1124 0 /* @tp_is_gc@ */
1125};
1126
1127static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1128 PyObject *arg, PyObject *kw)
1129{
1130 return (eccurve_pynew(ty, ec_prime, arg, kw));
1131}
1132
1133static PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1134 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1135 "ECPrimeCurve", /* @tp_name@ */
d7ab1bab 1136 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1137 0, /* @tp_itemsize@ */
1138
1139 eccurve_pydealloc, /* @tp_dealloc@ */
1140 0, /* @tp_print@ */
1141 0, /* @tp_getattr@ */
1142 0, /* @tp_setattr@ */
1143 0, /* @tp_compare@ */
1144 0, /* @tp_repr@ */
1145 0, /* @tp_as_number@ */
1146 0, /* @tp_as_sequence@ */
1147 0, /* @tp_as_mapping@ */
1148 0, /* @tp_hash@ */
1149 0, /* @tp_call@ */
1150 0, /* @tp_str@ */
1151 0, /* @tp_getattro@ */
1152 0, /* @tp_setattro@ */
1153 0, /* @tp_as_buffer@ */
1154 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1155 Py_TPFLAGS_BASETYPE,
1156
1157 /* @tp_doc@ */
1158 "An elliptic curve over a prime field. Use ecprimeprojcurve.",
1159
1160 0, /* @tp_traverse@ */
1161 0, /* @tp_clear@ */
1162 eccurve_pyrichcompare, /* @tp_richcompare@ */
1163 0, /* @tp_weaklistoffset@ */
1164 0, /* @tp_iter@ */
963a6148 1165 0, /* @tp_iternext@ */
d7ab1bab 1166 0, /* @tp_methods@ */
1167 0, /* @tp_members@ */
1168 0, /* @tp_getset@ */
1169 0, /* @tp_base@ */
1170 0, /* @tp_dict@ */
1171 0, /* @tp_descr_get@ */
1172 0, /* @tp_descr_set@ */
1173 0, /* @tp_dictoffset@ */
1174 0, /* @tp_init@ */
1175 PyType_GenericAlloc, /* @tp_alloc@ */
1176 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1177 0, /* @tp_free@ */
d7ab1bab 1178 0 /* @tp_is_gc@ */
1179};
1180
1181static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1182 PyObject *arg, PyObject *kw)
1183{
1184 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1185}
1186
1187static PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1188 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1189 "ECPrimeProjCurve", /* @tp_name@ */
d7ab1bab 1190 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1191 0, /* @tp_itemsize@ */
1192
1193 eccurve_pydealloc, /* @tp_dealloc@ */
1194 0, /* @tp_print@ */
1195 0, /* @tp_getattr@ */
1196 0, /* @tp_setattr@ */
1197 0, /* @tp_compare@ */
1198 0, /* @tp_repr@ */
1199 0, /* @tp_as_number@ */
1200 0, /* @tp_as_sequence@ */
1201 0, /* @tp_as_mapping@ */
1202 0, /* @tp_hash@ */
1203 0, /* @tp_call@ */
1204 0, /* @tp_str@ */
1205 0, /* @tp_getattro@ */
1206 0, /* @tp_setattro@ */
1207 0, /* @tp_as_buffer@ */
1208 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1209 Py_TPFLAGS_BASETYPE,
1210
1211 /* @tp_doc@ */
1212 "An elliptic curve over a prime field, using projective coordinates.",
1213
1214 0, /* @tp_traverse@ */
1215 0, /* @tp_clear@ */
1216 eccurve_pyrichcompare, /* @tp_richcompare@ */
1217 0, /* @tp_weaklistoffset@ */
1218 0, /* @tp_iter@ */
963a6148 1219 0, /* @tp_iternext@ */
d7ab1bab 1220 0, /* @tp_methods@ */
1221 0, /* @tp_members@ */
1222 0, /* @tp_getset@ */
1223 0, /* @tp_base@ */
1224 0, /* @tp_dict@ */
1225 0, /* @tp_descr_get@ */
1226 0, /* @tp_descr_set@ */
1227 0, /* @tp_dictoffset@ */
1228 0, /* @tp_init@ */
1229 PyType_GenericAlloc, /* @tp_alloc@ */
1230 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1231 0, /* @tp_free@ */
d7ab1bab 1232 0 /* @tp_is_gc@ */
1233};
1234
1235static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1236 PyObject *arg, PyObject *kw)
1237{
1238 return (eccurve_pynew(ty, ec_bin, arg, kw));
1239}
1240
1241static PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1242 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1243 "ECBinCurve", /* @tp_name@ */
d7ab1bab 1244 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1245 0, /* @tp_itemsize@ */
1246
1247 eccurve_pydealloc, /* @tp_dealloc@ */
1248 0, /* @tp_print@ */
1249 0, /* @tp_getattr@ */
1250 0, /* @tp_setattr@ */
1251 0, /* @tp_compare@ */
1252 0, /* @tp_repr@ */
1253 0, /* @tp_as_number@ */
1254 0, /* @tp_as_sequence@ */
1255 0, /* @tp_as_mapping@ */
1256 0, /* @tp_hash@ */
1257 0, /* @tp_call@ */
1258 0, /* @tp_str@ */
1259 0, /* @tp_getattro@ */
1260 0, /* @tp_setattro@ */
1261 0, /* @tp_as_buffer@ */
1262 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1263 Py_TPFLAGS_BASETYPE,
1264
1265 /* @tp_doc@ */
1266 "An elliptic curve over a binary field. Use ecbinprojcurve.",
1267
1268 0, /* @tp_traverse@ */
1269 0, /* @tp_clear@ */
1270 eccurve_pyrichcompare, /* @tp_richcompare@ */
1271 0, /* @tp_weaklistoffset@ */
1272 0, /* @tp_iter@ */
963a6148 1273 0, /* @tp_iternext@ */
d7ab1bab 1274 0, /* @tp_methods@ */
1275 0, /* @tp_members@ */
1276 0, /* @tp_getset@ */
1277 0, /* @tp_base@ */
1278 0, /* @tp_dict@ */
1279 0, /* @tp_descr_get@ */
1280 0, /* @tp_descr_set@ */
1281 0, /* @tp_dictoffset@ */
1282 0, /* @tp_init@ */
1283 PyType_GenericAlloc, /* @tp_alloc@ */
1284 ecbincurve_pynew, /* @tp_new@ */
3aa33042 1285 0, /* @tp_free@ */
d7ab1bab 1286 0 /* @tp_is_gc@ */
1287};
1288
1289static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1290 PyObject *arg, PyObject *kw)
1291{
1292 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1293}
1294
1295static PyTypeObject ecbinprojcurve_pytype_skel = {
6d4db0bf 1296 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1297 "ECBinProjCurve", /* @tp_name@ */
d7ab1bab 1298 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1299 0, /* @tp_itemsize@ */
1300
1301 eccurve_pydealloc, /* @tp_dealloc@ */
1302 0, /* @tp_print@ */
1303 0, /* @tp_getattr@ */
1304 0, /* @tp_setattr@ */
1305 0, /* @tp_compare@ */
1306 0, /* @tp_repr@ */
1307 0, /* @tp_as_number@ */
1308 0, /* @tp_as_sequence@ */
1309 0, /* @tp_as_mapping@ */
1310 0, /* @tp_hash@ */
1311 0, /* @tp_call@ */
1312 0, /* @tp_str@ */
1313 0, /* @tp_getattro@ */
1314 0, /* @tp_setattro@ */
1315 0, /* @tp_as_buffer@ */
1316 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1317 Py_TPFLAGS_BASETYPE,
1318
1319 /* @tp_doc@ */
1320 "An elliptic curve over a binary field, using projective coordinates.",
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@ */
1525 "Elliptic curve domain parameters.",
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