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