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*.c: Be more careful about `PySequence_Size'.
[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);
3383fdc1 191 MP_DROP(xx);
d7ab1bab 192 return (ecpt_pywrap(ECPT_COBJ(y), &zz));
193}
194
195static long ecpt_pyhash(PyObject *me)
196{
6d481bc6 197 uint32 h;
d7ab1bab 198 ec p = EC_INIT;
199
31e55c65
MW		 200 getecptout(&p, me);
201 if (EC_ATINF(&p)) h = 0x81d81a94;
202 else h = 0xe0fdd039 ^ (2*mphash(p.x)) ^ (3*mphash(p.y));
d7ab1bab 203 EC_DESTROY(&p);
31e55c65 204 return (h%LONG_MAX);
d7ab1bab 205}
206
207static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
208{
d7ab1bab 209 ec p = EC_INIT, q = EC_INIT;
210 int b;
211 PyObject *rc = 0;
212
61a549fb
MW		 213 if (!ECPT_PYCHECK(y)) RETURN_NOTIMPL;
214 getecptout(&p, x);
215 getecptout(&q, y);
d7ab1bab 216 switch (op) {
217 case Py_EQ: b = EC_EQ(&p, &q); break;
218 case Py_NE: b = !EC_EQ(&p, &q); break;
219 default: TYERR("elliptic curve points are unordered");
220 }
221 rc = getbool(b);
222end:
223 EC_DESTROY(&p);
224 EC_DESTROY(&q);
225 return (rc);
226}
227
228static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
229{
230 if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
49915b4a
MW		 231 return (getbool(EC_ATINF(ECPT_P(me)) ||
232 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
d7ab1bab 233}
234
235static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
236{
237 ec p = EC_INIT;
238 if (!PyArg_ParseTuple(arg, ":dbl")) return (0);
239 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
240 return (ecpt_pywrap(ECPT_COBJ(me), &p));
241}
242
243static PyObject *epmeth_tobuf(PyObject *me, PyObject *arg)
244{
245 buf b;
246 ec p = EC_INIT;
247 PyObject *rc;
248 size_t n;
249
250 if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
251 getecptout(&p, me);
252 if (EC_ATINF(&p))
253 n = 2;
254 else
f52568b4 255 n = mp_octets(p.x) + mp_octets(p.y) + 6;
d7ab1bab 256 rc = bytestring_pywrap(0, n);
257 buf_init(&b, PyString_AS_STRING(rc), n);
258 buf_putec(&b, &p);
259 assert(BOK(&b));
260 _PyString_Resize(&rc, BLEN(&b));
261 EC_DESTROY(&p);
262 return (rc);
263}
264
265static PyObject *epmeth_toraw(PyObject *me, PyObject *arg)
266{
267 buf b;
268 PyObject *rc;
269 char *p;
270 ec_curve *c = ECPT_C(me);
271 ec pp = EC_INIT;
272 int len;
273
274 if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
275 len = c->f->noctets * 2 + 1;
276 rc = bytestring_pywrap(0, len);
277 p = PyString_AS_STRING(rc);
278 buf_init(&b, p, len);
279 EC_OUT(c, &pp, ECPT_P(me));
280 ec_putraw(c, &b, &pp);
281 EC_DESTROY(&pp);
282 _PyString_Resize(&rc, BLEN(&b));
283 return (rc);
284}
285
e12df5f3
MW		 286static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
287{
288 buf b;
289 PyObject *rc;
290 char *p;
291 ec_curve *c = ECPT_C(me);
292 ec pp = EC_INIT;
c8b711c4 293 unsigned f = EC_EXPLY;
e12df5f3
MW		 294 int len;
295 char *kwlist[] = { "flags", 0 };
296
c8b711c4
MW		 297 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:ec2osp", kwlist,
298 convuint, &f))
e12df5f3
MW		 299 return (0);
300 len = c->f->noctets * 2 + 1;
301 rc = bytestring_pywrap(0, len);
302 p = PyString_AS_STRING(rc);
303 buf_init(&b, p, len);
304 EC_OUT(c, &pp, ECPT_P(me));
305 if (ec_ec2osp(c, f, &b, &pp)) {
306 Py_DECREF(rc); rc = 0;
307 VALERR("invalid flags");
308 }
309 EC_DESTROY(&pp);
310 _PyString_Resize(&rc, BLEN(&b));
311end:
312 return (rc);
313}
314
d7ab1bab 315static PyObject *epget_curve(PyObject *me, void *hunoz)
316 { RETURN_OBJ(ECPT_COBJ(me)); }
317
318static PyObject *epncget_ix(PyObject *me, void *hunoz)
319{
320 ec p = EC_INIT;
321 PyObject *rc;
322 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
323 getecptout(&p, me);
324 rc = mp_pywrap(MP_COPY(p.x));
325 EC_DESTROY(&p);
326 return (rc);
327}
328
329static PyObject *epncget_iy(PyObject *me, void *hunoz)
330{
331 ec p = EC_INIT;
332 PyObject *rc;
333 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
334 getecptout(&p, me);
335 rc = mp_pywrap(MP_COPY(p.y));
336 EC_DESTROY(&p);
337 return (rc);
338}
339
340static PyObject *epncget_point(PyObject *me, void *hunoz)
341 { RETURN_ME; }
342
343static PyObject *epget_point(PyObject *me, void *hunoz)
344{
345 ec p = EC_INIT;
346 getecptout(&p, me);
347 return (ecpt_pywrapout(ecpt_pytype, &p));
348}
349
350static PyObject *epget_x(PyObject *me, void *hunoz)
351{
352 ec_curve *c = ECPT_C(me);
353 ec *pp = ECPT_P(me);
354 PyObject *fobj = ECPT_FOBJ(me);
355 ec p = EC_INIT;
356 PyObject *rc;
357
358 if (EC_ATINF(pp)) RETURN_NONE;
359 EC_OUT(c, &p, pp);
360 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
361 EC_DESTROY(&p);
362 return (rc);
363}
364
365static PyObject *epget_y(PyObject *me, void *hunoz)
366{
367 ec_curve *c = ECPT_C(me);
368 ec *pp = ECPT_P(me);
369 PyObject *fobj = ECPT_FOBJ(me);
370 ec p = EC_INIT;
371 PyObject *rc;
372
373 if (EC_ATINF(pp)) RETURN_NONE;
374 EC_OUT(c, &p, pp);
375 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
376 EC_DESTROY(&p);
377 return (rc);
378}
379
380static PyObject *epget__x(PyObject *me, void *hunoz)
381{
382 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
383 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
384}
385
386static PyObject *epget__y(PyObject *me, void *hunoz)
387{
388 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
389 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
390}
391
392static PyObject *epget__z(PyObject *me, void *hunoz)
393{
394 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
395 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
396}
397
398static mp *coord_in(field *f, PyObject *x)
399{
400 mp *xx;
401 if (FE_PYCHECK(x) && FE_F(x) == f)
402 return (MP_COPY(FE_X(x)));
403 else if ((xx = getmp(x)) == 0)
404 return (0);
405 else
406 return (F_IN(f, xx, xx));
407}
408
409static int ecptxl_3(ec_curve *c, ec *p,
410 PyObject *x, PyObject *y, PyObject *z)
411{
412 int rc = -1;
413
414 if (!x || !y || !z) TYERR("missing argument");
415 if (!c) VALERR("internal form with no curve!");
2ee1ed30
MW		 416 if ((p->x = coord_in(c->f, x)) == 0 ||
417 (p->y = coord_in(c->f, y)) == 0 ||
418 (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
d7ab1bab 419 goto end;
420 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
421 rc = 0;
422end:
423 return (rc);
424}
425
426static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
427{
428 int rc = -1;
429
430 if (!x || !y) TYERR("missing argument");
431 if ((p->x = getmp(x)) == 0 ||
432 (p->y = getmp(y)) == 0)
433 goto end;
434 if (c) EC_IN(c, p, p);
435 rc = 0;
436end:
437 return (rc);
438}
439
440static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
441{
442 int rc = -1;
443 PyObject *y = 0, *z = 0, *t = 0;
444 mp *xx = 0;
445 const void *q;
446 int n;
447 qd_parse qd;
448
449 Py_XINCREF(x);
450 if (!x || x == Py_None)
451 /*cool*/;
452 else if (ECPT_PYCHECK(x)) {
453 getecptout(p, x);
454 goto fix;
455 } else if (PyString_Check(x)) {
ba033513 456 if (PyObject_AsReadBuffer(x, &q, &n))
d7ab1bab 457 goto end;
458 qd.p = q;
459 qd.e = 0;
460 if (!ec_ptparse(&qd, p))
80f7cd89 461 VALERR(qd.e);
d7ab1bab 462 goto fix;
463 } else if (c && (xx = tomp(x)) != 0) {
464 xx = F_IN(c->f, xx, xx);
465 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
466 } else if (PySequence_Check(x)) {
467 t = x; x = 0;
4281a7ee 468 n = PySequence_Size(t); if (n < 0) goto end;
d7ab1bab 469 if (n != 2 && (n != 3 || !c))
470 TYERR("want sequence of two or three items");
471 if ((x = PySequence_GetItem(t, 0)) == 0 ||
472 (y = PySequence_GetItem(t, 1)) == 0 ||
473 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
474 goto end;
475 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
476 } else
477 TYERR("can't convert to curve point");
478 goto ok;
479
480fix:
481 if (c) EC_IN(c, p, p);
482ok:
483 rc = 0;
484end:
485 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
486 mp_drop(xx);
487 return (rc);
488}
489
490static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
491{
492 if (z)
493 return (ecptxl_3(c, p, x, y, z));
494 else if (y)
495 return (ecptxl_2(c, p, x, y));
496 else
497 return (ecptxl_1(c, p, x));
498}
499
d7ab1bab 500static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
501{
502 PyObject *x = 0, *y = 0, *z = 0;
503 ec p = EC_INIT;
504 char *kwlist[] = { "x", "y", 0 };
505
506 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", kwlist, &x, &y) ||
507 ecptxl(0, &p, x, y, z))
508 goto end;
509 return (ecpt_pywrapout(ty, &p));
510end:
511 EC_DESTROY(&p);
512 return (0);
513}
514
515static PyObject *ecpt_pyint(PyObject *me)
516{
517 ec p = EC_INIT;
518 long l;
519 PyObject *rc = 0;
520 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
521 getecptout(&p, me);
bc243788
MW		 522 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
523 else rc = mp_topylong(p.x);
d7ab1bab 524end:
525 EC_DESTROY(&p);
526 return (rc);
527}
528
529static PyObject *ecpt_pylong(PyObject *me)
530{
531 ec p = EC_INIT;
532 PyObject *rc = 0;
533 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
534 getecptout(&p, me);
f368b46e 535 rc = mp_topylong(p.x);
d7ab1bab 536end:
537 EC_DESTROY(&p);
538 return (rc);
539}
540
541static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
542{
543 PyObject *x = 0, *y = 0, *z = 0;
544 ec p = EC_INIT;
545 char *kwlist[] = { "x", "y", "z", 0 };
546
547 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", kwlist,
548 &x, &y, &z) ||
549 ecptxl(ECCURVE_C(ty), &p, x, y, z))
550 goto end;
551 return (ecpt_pywrap((PyObject *)ty, &p));
552end:
553 EC_DESTROY(&p);
554 return (0);
555}
556
557static PyGetSetDef ecptnc_pygetset[] = {
558#define GETSETNAME(op, name) epnc##op##_##name
559 GET (ix, "P.ix -> integer x coordinate of P")
560 GET (iy, "P.iy -> integer y coordinate of P")
561 GET (point, "P.point -> standalone curve point (no-op)")
562#undef GETSETNAME
563 { 0 }
564};
565
566static PyMethodDef ecptnc_pymethods[] = {
567#define METHNAME(func) epmeth_##func
568 METH (tobuf, "X.tobuf() -> BIN")
569#undef METHNAME
570 { 0 }
571};
572
573static PyNumberMethods ecpt_pynumber = {
574 0, /* @nb_add@ */
575 0, /* @nb_subtract@ */
576 0, /* @nb_multiply@ */
577 0, /* @nb_divide@ */
578 0, /* @nb_remainder@ */
579 0, /* @nb_divmod@ */
580 0, /* @nb_power@ */
581 0, /* @nb_negative@ */
582 0, /* @nb_positive@ */
583 0, /* @nb_absolute@ */
584 ecpt_pynonzerop, /* @nb_nonzero@ */
585 0, /* @nb_invert@ */
586 0, /* @nb_lshift@ */
587 0, /* @nb_rshift@ */
588 0, /* @nb_and@ */
589 0, /* @nb_xor@ */
590 0, /* @nb_or@ */
591 0, /* @nb_coerce@ */
592 ecpt_pyint, /* @nb_int@ */
593 ecpt_pylong, /* @nb_long@ */
594 0, /* @nb_float@ */
595 0, /* @nb_oct@ */
596 0, /* @nb_hex@ */
597
598 0, /* @nb_inplace_add@ */
599 0, /* @nb_inplace_subtract@ */
600 0, /* @nb_inplace_multiply@ */
601 0, /* @nb_inplace_divide@ */
602 0, /* @nb_inplace_remainder@ */
603 0, /* @nb_inplace_power@ */
604 0, /* @nb_inplace_lshift@ */
605 0, /* @nb_inplace_rshift@ */
606 0, /* @nb_inplace_and@ */
607 0, /* @nb_inplace_xor@ */
608 0, /* @nb_inplace_or@ */
609
610 0, /* @nb_floor_divide@ */
611 0, /* @nb_true_divide@ */
612 0, /* @nb_inplace_floor_divide@ */
613 0, /* @nb_inplace_true_divide@ */
614};
615
616static PyTypeObject ecpt_pytype_skel = {
6d4db0bf 617 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 618 "ECPt", /* @tp_name@ */
d7ab1bab 619 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
620 0, /* @tp_itemsize@ */
621
622 ecpt_pydealloc, /* @tp_dealloc@ */
623 0, /* @tp_print@ */
624 0, /* @tp_getattr@ */
625 0, /* @tp_setattr@ */
626 0, /* @tp_compare@ */
627 0, /* @tp_repr@ */
628 &ecpt_pynumber, /* @tp_as_number@ */
629 0, /* @tp_as_sequence@ */
630 0, /* @tp_as_mapping@ */
631 ecpt_pyhash, /* @tp_hash@ */
632 0, /* @tp_call@ */
633 0, /* @tp_str@ */
634 0, /* @tp_getattro@ */
635 0, /* @tp_setattro@ */
636 0, /* @tp_as_buffer@ */
637 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
638 Py_TPFLAGS_CHECKTYPES |
639 Py_TPFLAGS_BASETYPE,
640
641 /* @tp_doc@ */
642"Elliptic curve points, not associated with any curve.",
643
644 0, /* @tp_traverse@ */
645 0, /* @tp_clear@ */
646 ecpt_pyrichcompare, /* @tp_richcompare@ */
647 0, /* @tp_weaklistoffset@ */
648 0, /* @tp_iter@ */
963a6148 649 0, /* @tp_iternext@ */
d7ab1bab 650 ecptnc_pymethods, /* @tp_methods@ */
651 0, /* @tp_members@ */
652 ecptnc_pygetset, /* @tp_getset@ */
653 0, /* @tp_base@ */
654 0, /* @tp_dict@ */
655 0, /* @tp_descr_get@ */
656 0, /* @tp_descr_set@ */
657 0, /* @tp_dictoffset@ */
658 0, /* @tp_init@ */
659 PyType_GenericAlloc, /* @tp_alloc@ */
660 ecptnc_pynew, /* @tp_new@ */
3aa33042 661 0, /* @tp_free@ */
d7ab1bab 662 0 /* @tp_is_gc@ */
663};
664
665static PyGetSetDef ecpt_pygetset[] = {
666#define GETSETNAME(op, name) ep##op##_##name
667 GET (curve, "P.curve -> elliptic curve containing P")
668 GET (point, "P.point -> standalone curve point")
669 GET (x, "P.x -> Cartesian x coordinate of P")
670 GET (y, "P.y -> Cartesian y coordinate of P")
671 GET (_x, "P._x -> internal x coordinate of P")
672 GET (_y, "P._y -> internal y coordinate of P")
673 GET (_z, "P._z -> internal z coordinate of P, or None")
674#undef GETSETNAME
675 { 0 }
676};
677
678static PyMethodDef ecpt_pymethods[] = {
679#define METHNAME(func) epmeth_##func
680 METH (toraw, "X.toraw() -> BIN")
e12df5f3 681 KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
d7ab1bab 682 METH (dbl, "X.dbl() -> X + X")
3aa33042 683 METH (oncurvep, "X.oncurvep() -> BOOL")
d7ab1bab 684#undef METHNAME
685 { 0 }
686};
687
688static PyNumberMethods ecptcurve_pynumber = {
689 ecpt_pyadd, /* @nb_add@ */
690 ecpt_pysub, /* @nb_subtract@ */
691 ecpt_pymul, /* @nb_multiply@ */
692 0, /* @nb_divide@ */
693 0, /* @nb_remainder@ */
694 0, /* @nb_divmod@ */
695 0, /* @nb_power@ */
696 ecpt_pyneg, /* @nb_negative@ */
697 ecpt_pyid, /* @nb_positive@ */
698 0, /* @nb_absolute@ */
699 0, /* @nb_nonzero@ */
700 0, /* @nb_invert@ */
701 0, /* @nb_lshift@ */
702 0, /* @nb_rshift@ */
703 0, /* @nb_and@ */
704 0, /* @nb_xor@ */
705 0, /* @nb_or@ */
706 0, /* @nb_coerce@ */
707 0, /* @nb_int@ */
708 0, /* @nb_long@ */
709 0, /* @nb_float@ */
710 0, /* @nb_oct@ */
711 0, /* @nb_hex@ */
712
713 0, /* @nb_inplace_add@ */
714 0, /* @nb_inplace_subtract@ */
715 0, /* @nb_inplace_multiply@ */
716 0, /* @nb_inplace_divide@ */
717 0, /* @nb_inplace_remainder@ */
718 0, /* @nb_inplace_power@ */
719 0, /* @nb_inplace_lshift@ */
720 0, /* @nb_inplace_rshift@ */
721 0, /* @nb_inplace_and@ */
722 0, /* @nb_inplace_xor@ */
723 0, /* @nb_inplace_or@ */
724
725 0, /* @nb_floor_divide@ */
726 0, /* @nb_true_divide@ */
727 0, /* @nb_inplace_floor_divide@ */
728 0, /* @nb_inplace_true_divide@ */
729};
730
731static PyTypeObject ecptcurve_pytype_skel = {
6d4db0bf 732 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 733 "ECPtCurve", /* @tp_name@ */
d7ab1bab 734 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
735 0, /* @tp_itemsize@ */
736
737 ecpt_pydealloc, /* @tp_dealloc@ */
738 0, /* @tp_print@ */
739 0, /* @tp_getattr@ */
740 0, /* @tp_setattr@ */
741 0, /* @tp_compare@ */
742 0, /* @tp_repr@ */
743 &ecptcurve_pynumber, /* @tp_as_number@ */
744 0, /* @tp_as_sequence@ */
745 0, /* @tp_as_mapping@ */
746 0, /* @tp_hash@ */
747 0, /* @tp_call@ */
748 0, /* @tp_str@ */
749 0, /* @tp_getattro@ */
750 0, /* @tp_setattro@ */
751 0, /* @tp_as_buffer@ */
752 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
753 Py_TPFLAGS_CHECKTYPES |
754 Py_TPFLAGS_BASETYPE,
755
756 /* @tp_doc@ */
757"Elliptic curve points; abstract base class for points on given curves.",
758
759 0, /* @tp_traverse@ */
760 0, /* @tp_clear@ */
761 0, /* @tp_richcompare@ */
762 0, /* @tp_weaklistoffset@ */
763 0, /* @tp_iter@ */
963a6148 764 0, /* @tp_iternext@ */
d7ab1bab 765 ecpt_pymethods, /* @tp_methods@ */
766 0, /* @tp_members@ */
767 ecpt_pygetset, /* @tp_getset@ */
768 0, /* @tp_base@ */
769 0, /* @tp_dict@ */
770 0, /* @tp_descr_get@ */
771 0, /* @tp_descr_set@ */
772 0, /* @tp_dictoffset@ */
773 0, /* @tp_init@ */
774 PyType_GenericAlloc, /* @tp_alloc@ */
775 abstract_pynew, /* @tp_new@ */
3aa33042 776 0, /* @tp_free@ */
d7ab1bab 777 0 /* @tp_is_gc@ */
778};
779
780/*----- Elliptic curves themselves ----------------------------------------*/
781
782static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
783{
7f8c2476
MW		 784 int b;
785
786 assert(ECCURVE_PYCHECK(x));
787 if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
788 b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
d7ab1bab 789 switch (op) {
790 case Py_EQ: break;
2c1ccbae 791 case Py_NE: b = !b; break;
d7ab1bab 792 default: TYERR("can't order elliptic curves");
793 }
794 return (getbool(b));
795end:
796 return (0);
797}
798
799static PyObject *ecmmul_id(PyObject *me)
800 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
801
802static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
803{
804 ec_mulfactor *f = pp;
805
50bff227 806 EC_CREATE(&f->base);
d7ab1bab 807 if (getecpt(ECCURVE_C(me), &f->base, x) ||
808 (f->exp = getmp(m)) == 0)
809 return (-1);
d7ab1bab 810 return (0);
811}
812
813static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
814{
815 ec p = EC_INIT;
816 ec_immul(ECCURVE_C(me), &p, pp, n);
817 return (ecpt_pywrap(me, &p));
818}
819
820static void ecmmul_drop(void *pp)
821{
822 ec_mulfactor *f = pp;
823 EC_DESTROY(&f->base);
824 MP_DROP(f->exp);
825}
826
827static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
828{
829 return (mexp_common(me, arg, sizeof(ec_mulfactor),
830 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
831}
832
833static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
834{
835 char *p;
6b54260d 836 Py_ssize_t len;
d7ab1bab 837 buf b;
838 PyObject *rc = 0;
839 ec_curve *cc;
840 ec pp = EC_INIT;
841
842 if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &len))
843 return (0);
844 buf_init(&b, p, len);
845 cc = ECCURVE_C(me);
846 if (ec_getraw(cc, &b, &pp))
80f7cd89 847 VALERR("bad point");
d7ab1bab 848 EC_IN(cc, &pp, &pp);
849 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
850end:
851 return (rc);
852}
853
e12df5f3
MW		 854static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
855 PyObject *arg, PyObject *kw)
856{
857 char *p;
6b54260d 858 Py_ssize_t len;
e12df5f3
MW		 859 buf b;
860 PyObject *rc = 0;
861 ec_curve *cc;
c8b711c4 862 unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
e12df5f3 863 ec pp = EC_INIT;
dc19440f 864 char *kwlist[] = { "class", "buf", "flags", 0 };
e12df5f3 865
c8b711c4
MW		 866 if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|O&:os2ecp", kwlist,
867 &me, &p, &len, convuint, &f))
e12df5f3
MW		 868 return (0);
869 buf_init(&b, p, len);
870 cc = ECCURVE_C(me);
871 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
872 EC_IN(cc, &pp, &pp);
873 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
874end:
875 return (rc);
876}
877
d7ab1bab 878static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
879{
880 buf b;
881 char *p;
6b54260d 882 Py_ssize_t sz;
d7ab1bab 883 PyObject *rc = 0;
884 ec pp = EC_INIT;
885
886 if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &sz)) goto end;
887 buf_init(&b, p, sz);
888 if (buf_getec(&b, &pp)) VALERR("malformed data");
889 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
890 bytestring_pywrapbuf(&b));
891end:
892 return (rc);
893}
894
895static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
896{
897 char *p;
898 qd_parse qd;
899 PyObject *rc = 0;
900 ec pp = EC_INIT;
901
902 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
903 qd.p = p;
904 qd.e = 0;
80f7cd89 905 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
d7ab1bab 906 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
907end:
908 return (rc);
909}
910
911static void eccurve_pydealloc(PyObject *me)
912{
913 ec_destroycurve(ECCURVE_C(me));
914 Py_DECREF(ECCURVE_FOBJ(me));
915 PyType_Type.tp_dealloc(me);
916}
917
918static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
919{
920 PyObject *x;
921 mp *xx = 0;
922 ec p = EC_INIT;
923 PyObject *rc = 0;
924
925 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
926 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
927 xx = MP_COPY(FE_X(x));
928 else if ((xx = getmp(x)) == 0)
929 goto end;
930 else
931 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
932 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
933 VALERR("not on the curve");
934 rc = ecpt_pywrap(me, &p);
935end:
936 if (xx) MP_DROP(xx);
937 return (rc);
938}
939
940static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
941{
942 char *kwlist[] = { "rng", 0 };
943 grand *r = &rand_global;
944 ec p = EC_INIT;
945
946 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", kwlist,
947 convgrand, &r))
948 return (0);
949 ec_rand(ECCURVE_C(me), &p, r);
950 EC_IN(ECCURVE_C(me), &p, &p);
951 return (ecpt_pywrap(me, &p));
952}
953
954static PyObject *eccurve_dopywrap(PyTypeObject *ty,
955 PyObject *fobj, ec_curve *c)
956{
df9f8366 957 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 958 cobj->c = c;
959 cobj->fobj = fobj;
24b3d57b
MW		 960 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
961 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 962 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 963 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
964 Py_TPFLAGS_BASETYPE |
965 Py_TPFLAGS_CHECKTYPES |
966 Py_TPFLAGS_HEAPTYPE);
967 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
968 cobj->ty.ht_type.tp_free = 0;
969 cobj->ty.ht_type.tp_new = ecpt_pynew;
dc075750 970 typeready(&cobj->ty.ht_type);
d7ab1bab 971 return ((PyObject *)cobj);
972}
973
974PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
975{
976 PyTypeObject *ty;
977
978 if (!fobj)
979 fobj = field_pywrap(c->f);
980 else
981 Py_INCREF(fobj);
982 assert(FIELD_F(fobj) == c->f);
983 if (strcmp(EC_NAME(c), "prime") == 0)
984 ty = ecprimecurve_pytype;
985 else if (strcmp(EC_NAME(c), "primeproj") == 0)
986 ty = ecprimeprojcurve_pytype;
987 else if (strcmp(EC_NAME(c), "bin") == 0)
988 ty = ecbincurve_pytype;
989 else if (strcmp(EC_NAME(c), "binproj") == 0)
990 ty = ecbinprojcurve_pytype;
991 else
992 abort();
993 return (eccurve_dopywrap(ty, fobj, c));
994}
995
996static PyObject *eccurve_pynew(PyTypeObject *ty,
997 ec_curve *(*make)(field *, mp *, mp *),
998 PyObject *arg, PyObject *kw)
999{
1000 PyObject *fobj;
1001 PyObject *cobj = 0;
1002 char *kwlist[] = { "field", "a", "b", 0 };
1003 mp *aa = 0, *bb = 0;
1004
5f959e50 1005 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", kwlist,
d7ab1bab 1006 field_pytype, &fobj,
1007 convmp, &aa, convmp, &bb))
1008 goto end;
1009 Py_INCREF(fobj);
1010 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1011end:
1012 if (aa) MP_DROP(aa);
1013 if (bb) MP_DROP(bb);
1014 return (cobj);
1015}
1016
1017static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
1018{
1019 char *p;
1020 qd_parse qd;
1021 ec_curve *c;
1022 PyObject *rc = 0;
1023
46e6ad89 1024 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
d7ab1bab 1025 goto end;
1026 qd.p = p;
1027 qd.e = 0;
1028 if ((c = ec_curveparse(&qd)) == 0)
80f7cd89 1029 VALERR(qd.e);
d7ab1bab 1030 rc = eccurve_pywrap(0, c);
1031end:
1032 return (rc);
1033}
1034
1035static PyObject *ecget_name(PyObject *me, void *hunoz)
1036 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1037
1038static PyObject *ecget_a(PyObject *me, void *hunoz)
1039 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1040
b2687a0a 1041static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 1042 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1043
1044static PyObject *ecget_field(PyObject *me, void *hunoz)
1045 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1046
1047static PyObject *ecget_inf(PyObject *me, void *hunoz)
1048 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1049
1050static PyGetSetDef eccurve_pygetset[] = {
1051#define GETSETNAME(op, name) ec##op##_##name
1052 GET (name, "E.name -> name of this kind of curve")
1053 GET (a, "E.a -> first parameter of curve")
1054 GET (b, "E.b -> second parameter of curve")
1055 GET (field, "E.field -> finite field containing this curve")
1056 GET (inf, "E.inf -> point at infinity of this curve")
1057#undef GETSETNAME
1058 { 0 }
b2687a0a 1059};
d7ab1bab 1060
1061static PyMethodDef eccurve_pymethods[] = {
1062#define METHNAME(name) ecmeth_##name
1063 METH (mmul, "\
1064E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
1065 METH (find, "E.find(X) -> P")
1df8d5fe 1066 KWMETH(rand, "E.rand([rng = rand]) -> P")
d7ab1bab 1067#undef METHNAME
1068 { 0 }
1069};
1070
1071static PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1072 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1073 "ECCurve", /* @tp_name@ */
d7ab1bab 1074 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1075 0, /* @tp_itemsize@ */
1076
1077 eccurve_pydealloc, /* @tp_dealloc@ */
1078 0, /* @tp_print@ */
1079 0, /* @tp_getattr@ */
1080 0, /* @tp_setattr@ */
1081 0, /* @tp_compare@ */
1082 0, /* @tp_repr@ */
1083 0, /* @tp_as_number@ */
1084 0, /* @tp_as_sequence@ */
1085 0, /* @tp_as_mapping@ */
1086 0, /* @tp_hash@ */
1087 0, /* @tp_call@ */
1088 0, /* @tp_str@ */
1089 0, /* @tp_getattro@ */
1090 0, /* @tp_setattro@ */
1091 0, /* @tp_as_buffer@ */
1092 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1093 Py_TPFLAGS_BASETYPE,
1094
1095 /* @tp_doc@ */
1096 "An elliptic curve. Abstract class.",
1097
1098 0, /* @tp_traverse@ */
1099 0, /* @tp_clear@ */
1100 eccurve_pyrichcompare, /* @tp_richcompare@ */
1101 0, /* @tp_weaklistoffset@ */
1102 0, /* @tp_iter@ */
963a6148 1103 0, /* @tp_iternext@ */
d7ab1bab 1104 eccurve_pymethods, /* @tp_methods@ */
1105 0, /* @tp_members@ */
1106 eccurve_pygetset, /* @tp_getset@ */
1107 0, /* @tp_base@ */
1108 0, /* @tp_dict@ */
1109 0, /* @tp_descr_get@ */
1110 0, /* @tp_descr_set@ */
1111 0, /* @tp_dictoffset@ */
1112 0, /* @tp_init@ */
1113 PyType_GenericAlloc, /* @tp_alloc@ */
1114 abstract_pynew, /* @tp_new@ */
3aa33042 1115 0, /* @tp_free@ */
d7ab1bab 1116 0 /* @tp_is_gc@ */
1117};
1118
1119static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1120 PyObject *arg, PyObject *kw)
1121{
1122 return (eccurve_pynew(ty, ec_prime, arg, kw));
1123}
1124
1125static PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1126 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1127 "ECPrimeCurve", /* @tp_name@ */
d7ab1bab 1128 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1129 0, /* @tp_itemsize@ */
1130
1131 eccurve_pydealloc, /* @tp_dealloc@ */
1132 0, /* @tp_print@ */
1133 0, /* @tp_getattr@ */
1134 0, /* @tp_setattr@ */
1135 0, /* @tp_compare@ */
1136 0, /* @tp_repr@ */
1137 0, /* @tp_as_number@ */
1138 0, /* @tp_as_sequence@ */
1139 0, /* @tp_as_mapping@ */
1140 0, /* @tp_hash@ */
1141 0, /* @tp_call@ */
1142 0, /* @tp_str@ */
1143 0, /* @tp_getattro@ */
1144 0, /* @tp_setattro@ */
1145 0, /* @tp_as_buffer@ */
1146 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1147 Py_TPFLAGS_BASETYPE,
1148
1149 /* @tp_doc@ */
1150 "An elliptic curve over a prime field. Use ecprimeprojcurve.",
1151
1152 0, /* @tp_traverse@ */
1153 0, /* @tp_clear@ */
1154 eccurve_pyrichcompare, /* @tp_richcompare@ */
1155 0, /* @tp_weaklistoffset@ */
1156 0, /* @tp_iter@ */
963a6148 1157 0, /* @tp_iternext@ */
d7ab1bab 1158 0, /* @tp_methods@ */
1159 0, /* @tp_members@ */
1160 0, /* @tp_getset@ */
1161 0, /* @tp_base@ */
1162 0, /* @tp_dict@ */
1163 0, /* @tp_descr_get@ */
1164 0, /* @tp_descr_set@ */
1165 0, /* @tp_dictoffset@ */
1166 0, /* @tp_init@ */
1167 PyType_GenericAlloc, /* @tp_alloc@ */
1168 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1169 0, /* @tp_free@ */
d7ab1bab 1170 0 /* @tp_is_gc@ */
1171};
1172
1173static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1174 PyObject *arg, PyObject *kw)
1175{
1176 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1177}
1178
1179static PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1180 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1181 "ECPrimeProjCurve", /* @tp_name@ */
d7ab1bab 1182 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1183 0, /* @tp_itemsize@ */
1184
1185 eccurve_pydealloc, /* @tp_dealloc@ */
1186 0, /* @tp_print@ */
1187 0, /* @tp_getattr@ */
1188 0, /* @tp_setattr@ */
1189 0, /* @tp_compare@ */
1190 0, /* @tp_repr@ */
1191 0, /* @tp_as_number@ */
1192 0, /* @tp_as_sequence@ */
1193 0, /* @tp_as_mapping@ */
1194 0, /* @tp_hash@ */
1195 0, /* @tp_call@ */
1196 0, /* @tp_str@ */
1197 0, /* @tp_getattro@ */
1198 0, /* @tp_setattro@ */
1199 0, /* @tp_as_buffer@ */
1200 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1201 Py_TPFLAGS_BASETYPE,
1202
1203 /* @tp_doc@ */
1204 "An elliptic curve over a prime field, using projective coordinates.",
1205
1206 0, /* @tp_traverse@ */
1207 0, /* @tp_clear@ */
1208 eccurve_pyrichcompare, /* @tp_richcompare@ */
1209 0, /* @tp_weaklistoffset@ */
1210 0, /* @tp_iter@ */
963a6148 1211 0, /* @tp_iternext@ */
d7ab1bab 1212 0, /* @tp_methods@ */
1213 0, /* @tp_members@ */
1214 0, /* @tp_getset@ */
1215 0, /* @tp_base@ */
1216 0, /* @tp_dict@ */
1217 0, /* @tp_descr_get@ */
1218 0, /* @tp_descr_set@ */
1219 0, /* @tp_dictoffset@ */
1220 0, /* @tp_init@ */
1221 PyType_GenericAlloc, /* @tp_alloc@ */
1222 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1223 0, /* @tp_free@ */
d7ab1bab 1224 0 /* @tp_is_gc@ */
1225};
1226
1227static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1228 PyObject *arg, PyObject *kw)
1229{
1230 return (eccurve_pynew(ty, ec_bin, arg, kw));
1231}
1232
1233static PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1234 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1235 "ECBinCurve", /* @tp_name@ */
d7ab1bab 1236 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1237 0, /* @tp_itemsize@ */
1238
1239 eccurve_pydealloc, /* @tp_dealloc@ */
1240 0, /* @tp_print@ */
1241 0, /* @tp_getattr@ */
1242 0, /* @tp_setattr@ */
1243 0, /* @tp_compare@ */
1244 0, /* @tp_repr@ */
1245 0, /* @tp_as_number@ */
1246 0, /* @tp_as_sequence@ */
1247 0, /* @tp_as_mapping@ */
1248 0, /* @tp_hash@ */
1249 0, /* @tp_call@ */
1250 0, /* @tp_str@ */
1251 0, /* @tp_getattro@ */
1252 0, /* @tp_setattro@ */
1253 0, /* @tp_as_buffer@ */
1254 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1255 Py_TPFLAGS_BASETYPE,
1256
1257 /* @tp_doc@ */
1258 "An elliptic curve over a binary field. Use ecbinprojcurve.",
1259
1260 0, /* @tp_traverse@ */
1261 0, /* @tp_clear@ */
1262 eccurve_pyrichcompare, /* @tp_richcompare@ */
1263 0, /* @tp_weaklistoffset@ */
1264 0, /* @tp_iter@ */
963a6148 1265 0, /* @tp_iternext@ */
d7ab1bab 1266 0, /* @tp_methods@ */
1267 0, /* @tp_members@ */
1268 0, /* @tp_getset@ */
1269 0, /* @tp_base@ */
1270 0, /* @tp_dict@ */
1271 0, /* @tp_descr_get@ */
1272 0, /* @tp_descr_set@ */
1273 0, /* @tp_dictoffset@ */
1274 0, /* @tp_init@ */
1275 PyType_GenericAlloc, /* @tp_alloc@ */
1276 ecbincurve_pynew, /* @tp_new@ */
3aa33042 1277 0, /* @tp_free@ */
d7ab1bab 1278 0 /* @tp_is_gc@ */
1279};
1280
1281static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1282 PyObject *arg, PyObject *kw)
1283{
1284 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1285}
1286
1287static PyTypeObject ecbinprojcurve_pytype_skel = {
6d4db0bf 1288 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1289 "ECBinProjCurve", /* @tp_name@ */
d7ab1bab 1290 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1291 0, /* @tp_itemsize@ */
1292
1293 eccurve_pydealloc, /* @tp_dealloc@ */
1294 0, /* @tp_print@ */
1295 0, /* @tp_getattr@ */
1296 0, /* @tp_setattr@ */
1297 0, /* @tp_compare@ */
1298 0, /* @tp_repr@ */
1299 0, /* @tp_as_number@ */
1300 0, /* @tp_as_sequence@ */
1301 0, /* @tp_as_mapping@ */
1302 0, /* @tp_hash@ */
1303 0, /* @tp_call@ */
1304 0, /* @tp_str@ */
1305 0, /* @tp_getattro@ */
1306 0, /* @tp_setattro@ */
1307 0, /* @tp_as_buffer@ */
1308 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1309 Py_TPFLAGS_BASETYPE,
1310
1311 /* @tp_doc@ */
1312 "An elliptic curve over a binary field, using projective coordinates.",
1313
1314 0, /* @tp_traverse@ */
1315 0, /* @tp_clear@ */
1316 eccurve_pyrichcompare, /* @tp_richcompare@ */
1317 0, /* @tp_weaklistoffset@ */
1318 0, /* @tp_iter@ */
963a6148 1319 0, /* @tp_iternext@ */
d7ab1bab 1320 0, /* @tp_methods@ */
1321 0, /* @tp_members@ */
1322 0, /* @tp_getset@ */
1323 0, /* @tp_base@ */
1324 0, /* @tp_dict@ */
1325 0, /* @tp_descr_get@ */
1326 0, /* @tp_descr_set@ */
1327 0, /* @tp_dictoffset@ */
1328 0, /* @tp_init@ */
1329 PyType_GenericAlloc, /* @tp_alloc@ */
1330 ecbinprojcurve_pynew, /* @tp_new@ */
3aa33042 1331 0, /* @tp_free@ */
d7ab1bab 1332 0 /* @tp_is_gc@ */
1333};
1334
1335/*----- Curve info --------------------------------------------------------*/
1336
1337static int ncurves = -1;
1338
1339void ecinfo_copy(ec_info *eic, const ec_info *ei)
1340{
1341 eic->c = eccurve_copy(ei->c);
1342 EC_CREATE(&eic->g);
1343 EC_COPY(&eic->g, &ei->g);
1344 eic->r = MP_COPY(ei->r);
1345 eic->h = MP_COPY(ei->h);
1346}
1347
1348PyObject *ecinfo_pywrap(ec_info *ei)
1349{
1350 ecinfo_pyobj *o;
1351
1352 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1353 o->ei = *ei;
1354 o->cobj = eccurve_pywrap(0, o->ei.c);
1355 Py_INCREF(o->cobj);
1356 return ((PyObject *)o);
1357}
1358
1359static void ecinfo_pydealloc(PyObject *me)
1360{
1361 ec_info *ei = ECINFO_EI(me);
1362 EC_DESTROY(&ei->g);
1363 MP_DROP(ei->r);
1364 MP_DROP(ei->h);
1365 Py_DECREF(ECINFO_COBJ(me));
3aa33042 1366 FREEOBJ(me);
d7ab1bab 1367}
1368
1369static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1370{
1371 ec_info ei = { 0 };
1372 PyObject *e, *g;
1373 char *kwlist[] = { "curve", "G", "r", "h", 0 };
1374 ecinfo_pyobj *rc = 0;
1375
1376 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", kwlist,
1377 eccurve_pytype, &e, ecpt_pytype, &g,
1378 convmp, &ei.r, convmp, &ei.h))
1379 goto end;
1380 if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e)))
1381 TYERR("point not from this curve");
1382 ei.c = ECCURVE_C(e);
1383 EC_CREATE(&ei.g);
30720615 1384 EC_OUT(ei.c, &ei.g, ECPT_P(g));
d7ab1bab 1385 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1386 rc->ei = ei;
1387 rc->cobj = e;
1388 Py_INCREF(rc->cobj);
1389 return ((PyObject *)rc);
1390
1391end:
1392 mp_drop(ei.r);
1393 mp_drop(ei.h);
1394 return (0);
1395}
1396
1397static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
1398{
1399 char *p;
1400 qd_parse qd;
1401 ec_info ei;
1402 PyObject *rc = 0;
1403
1404 if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
1405 goto end;
1406 qd.p = p;
1407 qd.e = 0;
1408 if (ec_infoparse(&qd, &ei))
80f7cd89 1409 VALERR(qd.e);
d7ab1bab 1410 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1411end:
1412 return (rc);
1413}
1414
1415static PyObject *meth__ECInfo__curven(PyObject *me, PyObject *arg)
1416{
1417 int i;
1418 ec_info ei;
1419 PyObject *rc = 0;
1420
1421 if (!PyArg_ParseTuple(arg, "Oi:_curven", &me, &i)) goto end;
1422 if (i < 0 || i >= ncurves) VALERR("curve index out of range");
1423 ec_infofromdata(&ei, ectab[i].data);
1424 rc = ecinfo_pywrap(&ei);
1425end:
1426 return (rc);
1427}
1428
1429static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1430{
1431 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1432 switch (op) {
1433 case Py_EQ: break;
1434 case Py_NE: b = !b;
1435 default: TYERR("can't order elliptic curve infos");
1436 }
1437 return (getbool(b));
1438end:
1439 return (0);
1440}
1441
1442static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1443{
1444 char *kwlist[] = { "rng", 0 };
1445 grand *r = &rand_global;
1446 const char *p;
1447
1448 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", kwlist,
1449 convgrand, &r))
1450 goto end;
1451 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1452 VALERR(p);
1453 RETURN_ME;
1454end:
1455 return (0);
1456}
1457
1458static PyObject *eiget_curve(PyObject *me, void *hunoz)
1459 { RETURN_OBJ(ECINFO_COBJ(me)); }
1460
1461static PyObject *eiget_G(PyObject *me, void *hunoz)
1462{
1463 ec_info *ei = ECINFO_EI(me);
1464 ec p = EC_INIT;
1465 EC_IN(ei->c, &p, &ei->g);
1466 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1467}
1468
1469static PyObject *eiget_r(PyObject *me, void *hunoz)
1470 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1471
1472static PyObject *eiget_h(PyObject *me, void *hunoz)
1473 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1474
1475static PyGetSetDef ecinfo_pygetset[] = {
1476#define GETSETNAME(op, name) ei##op##_##name
1477 GET (curve, "I.curve -> the elliptic curve")
1478 GET (G, "I.G -> generator point for the group")
1479 GET (r, "I.r -> order of the group (and hence of G")
1480 GET (h, "I.h -> cofactor of the group")
1481#undef GETSETNAME
1482 { 0 }
1483};
1484
1485static PyMethodDef ecinfo_pymethods[] = {
1486#define METHNAME(name) eimeth_##name
2465e84b 1487 KWMETH(check, "I.check([rng = rand]) -> None")
d7ab1bab 1488#undef METHNAME
1489 { 0 }
1490};
1491
1492static PyTypeObject ecinfo_pytype_skel = {
6d4db0bf 1493 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1494 "ECInfo", /* @tp_name@ */
d7ab1bab 1495 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1496 0, /* @tp_itemsize@ */
1497
1498 ecinfo_pydealloc, /* @tp_dealloc@ */
1499 0, /* @tp_print@ */
1500 0, /* @tp_getattr@ */
1501 0, /* @tp_setattr@ */
1502 0, /* @tp_compare@ */
1503 0, /* @tp_repr@ */
1504 0, /* @tp_as_number@ */
1505 0, /* @tp_as_sequence@ */
1506 0, /* @tp_as_mapping@ */
1507 0, /* @tp_hash@ */
1508 0, /* @tp_call@ */
1509 0, /* @tp_str@ */
1510 0, /* @tp_getattro@ */
1511 0, /* @tp_setattro@ */
1512 0, /* @tp_as_buffer@ */
1513 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1514 Py_TPFLAGS_BASETYPE,
1515
1516 /* @tp_doc@ */
1517 "Elliptic curve domain parameters.",
1518
1519 0, /* @tp_traverse@ */
1520 0, /* @tp_clear@ */
1521 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1522 0, /* @tp_weaklistoffset@ */
1523 0, /* @tp_iter@ */
963a6148 1524 0, /* @tp_iternext@ */
d7ab1bab 1525 ecinfo_pymethods, /* @tp_methods@ */
1526 0, /* @tp_members@ */
1527 ecinfo_pygetset, /* @tp_getset@ */
1528 0, /* @tp_base@ */
1529 0, /* @tp_dict@ */
1530 0, /* @tp_descr_get@ */
1531 0, /* @tp_descr_set@ */
1532 0, /* @tp_dictoffset@ */
1533 0, /* @tp_init@ */
1534 PyType_GenericAlloc, /* @tp_alloc@ */
1535 ecinfo_pynew, /* @tp_new@ */
3aa33042 1536 0, /* @tp_free@ */
d7ab1bab 1537 0 /* @tp_is_gc@ */
1538};
1539
1540/*----- Setup -------------------------------------------------------------*/
1541
1542static PyMethodDef methods[] = {
1543#define METHNAME(func) meth_##func
b2687a0a
MW		 1544 METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
1545 METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
e12df5f3 1546 KWMETH(_ECPtCurve_os2ecp, "os2ecp(E, STR, [flags = ...]) -> (P, REST)")
b2687a0a
MW		 1547 METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
1548 METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
1549 METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
1550 METH (_ECInfo__curven, "_curven(N) -> I")
d7ab1bab 1551#undef METHNAME
1552 { 0 }
1553};
1554
1555void ec_pyinit(void)
1556{
1557 INITTYPE(ecpt, root);
1558 INITTYPE(ecptcurve, ecpt);
1559 INITTYPE(eccurve, type);
1560 INITTYPE(ecprimecurve, eccurve);
1561 INITTYPE(ecprimeprojcurve, ecprimecurve);
1562 INITTYPE(ecbincurve, eccurve);
1563 INITTYPE(ecbinprojcurve, ecbincurve);
1564 INITTYPE(ecinfo, root);
1565 addmethods(methods);
1566}
1567
1568static PyObject *namedcurves(void)
1569{
1570 int i, j;
1571 const char *p;
1572 PyObject *d, *c;
1573
1574 d = PyDict_New();
1575 for (i = 0; ectab[i].name; i++) {
1576 p = ectab[i].name;
1577 for (j = 0; j < i; j++) {
1578 if (ectab[i].data == ectab[j].data) {
1579 c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name);
1580 Py_INCREF(c);
1581 goto found;
1582 }
1583 }
1584 c = PyInt_FromLong(i);
1585 found:
98963817 1586 PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
d7ab1bab 1587 Py_DECREF(c);
1588 }
1589 ncurves = i;
1590 return (d);
1591}
1592
1593void ec_pyinsert(PyObject *mod)
1594{
1595 INSERT("ECPt", ecpt_pytype);
1596 INSERT("ECPtCurve", ecptcurve_pytype);
1597 INSERT("ECCurve", eccurve_pytype);
1598 INSERT("ECPrimeCurve", ecprimecurve_pytype);
1599 INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype);
1600 INSERT("ECBinCurve", ecbincurve_pytype);
1601 INSERT("ECBinProjCurve", ecbinprojcurve_pytype);
1602 INSERT("ECInfo", ecinfo_pytype);
1603 INSERT("_eccurves", namedcurves());
1604}
1605
1606/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings