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pyke/pyke.[ch]: Make type skeleton structures be read-only.
[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);
20441612 51 if (STRCMP(EC_NAME(c), ==, "prime"))
d7ab1bab 52 c = ec_prime(f, a, b);
20441612 53 else if (STRCMP(EC_NAME(c), ==, "primeproj"))
d7ab1bab 54 c = ec_primeproj(f, a, b);
20441612 55 else if (STRCMP(EC_NAME(c), ==, "bin"))
d7ab1bab 56 c = ec_bin(f, a, b);
20441612 57 else if (STRCMP(EC_NAME(c), ==, "binproj"))
d7ab1bab 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
91e56f06 228static PyObject *epmeth_oncurvep(PyObject *me)
d7ab1bab 229{
49915b4a
MW		 230 return (getbool(EC_ATINF(ECPT_P(me)) ||
231 !EC_CHECK(ECPT_C(me), ECPT_P(me))));
d7ab1bab 232}
233
91e56f06 234static PyObject *epmeth_dbl(PyObject *me)
d7ab1bab 235{
236 ec p = EC_INIT;
d7ab1bab 237 EC_DBL(ECPT_C(me), &p, ECPT_P(me));
238 return (ecpt_pywrap(ECPT_COBJ(me), &p));
239}
240
91e56f06 241static PyObject *epmeth_tobuf(PyObject *me)
d7ab1bab 242{
243 buf b;
244 ec p = EC_INIT;
245 PyObject *rc;
246 size_t n;
247
d7ab1bab 248 getecptout(&p, me);
249 if (EC_ATINF(&p))
250 n = 2;
251 else
f52568b4 252 n = mp_octets(p.x) + mp_octets(p.y) + 6;
d7ab1bab 253 rc = bytestring_pywrap(0, n);
254 buf_init(&b, PyString_AS_STRING(rc), n);
255 buf_putec(&b, &p);
256 assert(BOK(&b));
257 _PyString_Resize(&rc, BLEN(&b));
258 EC_DESTROY(&p);
259 return (rc);
260}
261
91e56f06 262static PyObject *epmeth_toraw(PyObject *me)
d7ab1bab 263{
264 buf b;
265 PyObject *rc;
266 char *p;
267 ec_curve *c = ECPT_C(me);
268 ec pp = EC_INIT;
269 int len;
270
d7ab1bab 271 len = c->f->noctets * 2 + 1;
272 rc = bytestring_pywrap(0, len);
273 p = PyString_AS_STRING(rc);
274 buf_init(&b, p, len);
275 EC_OUT(c, &pp, ECPT_P(me));
276 ec_putraw(c, &b, &pp);
277 EC_DESTROY(&pp);
278 _PyString_Resize(&rc, BLEN(&b));
279 return (rc);
280}
281
e12df5f3
MW		 282static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
283{
284 buf b;
285 PyObject *rc;
286 char *p;
287 ec_curve *c = ECPT_C(me);
288 ec pp = EC_INIT;
c8b711c4 289 unsigned f = EC_EXPLY;
e12df5f3 290 int len;
827f89d7 291 static const char *const kwlist[] = { "flags", 0 };
e12df5f3 292
7f38dc76 293 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:ec2osp", KWLIST,
c8b711c4 294 convuint, &f))
e12df5f3
MW		 295 return (0);
296 len = c->f->noctets * 2 + 1;
297 rc = bytestring_pywrap(0, len);
298 p = PyString_AS_STRING(rc);
299 buf_init(&b, p, len);
300 EC_OUT(c, &pp, ECPT_P(me));
301 if (ec_ec2osp(c, f, &b, &pp)) {
302 Py_DECREF(rc); rc = 0;
303 VALERR("invalid flags");
304 }
305 EC_DESTROY(&pp);
306 _PyString_Resize(&rc, BLEN(&b));
307end:
308 return (rc);
309}
310
a157093f 311static PyObject *epmeth_frombuf(PyObject *me, PyObject *arg)
f281293c
MW		 312{
313 buf b;
314 char *p;
315 Py_ssize_t sz;
316 PyObject *rc = 0;
317 ec pp = EC_INIT;
318
a157093f 319 if (!PyArg_ParseTuple(arg, "s#:frombuf", &p, &sz)) goto end;
f281293c
MW		 320 buf_init(&b, p, sz);
321 if (buf_getec(&b, &pp)) VALERR("malformed data");
322 rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp),
323 bytestring_pywrapbuf(&b));
324end:
325 return (rc);
326}
327
a157093f 328static PyObject *epmeth_parse(PyObject *me, PyObject *arg)
f281293c
MW		 329{
330 char *p;
331 qd_parse qd;
332 PyObject *rc = 0;
333 ec pp = EC_INIT;
334
a157093f 335 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
f281293c
MW		 336 qd.p = p; qd.e = 0;
337 if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
338 rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
339end:
340 return (rc);
341}
342
a157093f 343static PyObject *epmeth_fromraw(PyObject *me, PyObject *arg)
f281293c
MW		 344{
345 char *p;
346 Py_ssize_t len;
347 buf b;
348 PyObject *rc = 0;
349 ec_curve *cc;
350 ec pp = EC_INIT;
351
a157093f 352 if (!PyArg_ParseTuple(arg, "s#:fromraw", &me, &p, &len)) return (0);
f281293c
MW		 353 buf_init(&b, p, len);
354 cc = ECCURVE_C(me);
355 if (ec_getraw(cc, &b, &pp))
356 VALERR("bad point");
357 EC_IN(cc, &pp, &pp);
358 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
359end:
360 return (rc);
361}
362
a157093f 363static PyObject *epmeth_os2ecp(PyObject *me, PyObject *arg, PyObject *kw)
f281293c
MW		 364{
365 char *p;
366 Py_ssize_t len;
367 buf b;
368 PyObject *rc = 0;
369 ec_curve *cc;
370 unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
371 ec pp = EC_INIT;
a157093f 372 static const char *const kwlist[] = { "buf", "flags", 0 };
f281293c 373
a157093f
MW		 374 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:os2ecp", KWLIST,
375 &p, &len, convuint, &f))
f281293c
MW		 376 return (0);
377 buf_init(&b, p, len);
378 cc = ECCURVE_C(me);
379 if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
380 EC_IN(cc, &pp, &pp);
381 rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
382end:
383 return (rc);
384}
385
d7ab1bab 386static PyObject *epncget_ix(PyObject *me, void *hunoz)
387{
388 ec p = EC_INIT;
389 PyObject *rc;
390 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
391 getecptout(&p, me);
392 rc = mp_pywrap(MP_COPY(p.x));
393 EC_DESTROY(&p);
394 return (rc);
395}
396
397static PyObject *epncget_iy(PyObject *me, void *hunoz)
398{
399 ec p = EC_INIT;
400 PyObject *rc;
401 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
402 getecptout(&p, me);
403 rc = mp_pywrap(MP_COPY(p.y));
404 EC_DESTROY(&p);
405 return (rc);
406}
407
408static PyObject *epncget_point(PyObject *me, void *hunoz)
409 { RETURN_ME; }
410
411static PyObject *epget_point(PyObject *me, void *hunoz)
412{
413 ec p = EC_INIT;
414 getecptout(&p, me);
415 return (ecpt_pywrapout(ecpt_pytype, &p));
416}
417
418static PyObject *epget_x(PyObject *me, void *hunoz)
419{
420 ec_curve *c = ECPT_C(me);
421 ec *pp = ECPT_P(me);
422 PyObject *fobj = ECPT_FOBJ(me);
423 ec p = EC_INIT;
424 PyObject *rc;
425
426 if (EC_ATINF(pp)) RETURN_NONE;
427 EC_OUT(c, &p, pp);
428 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x));
429 EC_DESTROY(&p);
430 return (rc);
431}
432
433static PyObject *epget_y(PyObject *me, void *hunoz)
434{
435 ec_curve *c = ECPT_C(me);
436 ec *pp = ECPT_P(me);
437 PyObject *fobj = ECPT_FOBJ(me);
438 ec p = EC_INIT;
439 PyObject *rc;
440
441 if (EC_ATINF(pp)) RETURN_NONE;
442 EC_OUT(c, &p, pp);
443 rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y));
444 EC_DESTROY(&p);
445 return (rc);
446}
447
448static PyObject *epget__x(PyObject *me, void *hunoz)
449{
450 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
451 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x)));
452}
453
454static PyObject *epget__y(PyObject *me, void *hunoz)
455{
456 if (EC_ATINF(ECPT_P(me))) RETURN_NONE;
457 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y)));
458}
459
460static PyObject *epget__z(PyObject *me, void *hunoz)
461{
462 if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE;
463 return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z)));
464}
465
466static mp *coord_in(field *f, PyObject *x)
467{
468 mp *xx;
469 if (FE_PYCHECK(x) && FE_F(x) == f)
470 return (MP_COPY(FE_X(x)));
471 else if ((xx = getmp(x)) == 0)
472 return (0);
473 else
474 return (F_IN(f, xx, xx));
475}
476
477static int ecptxl_3(ec_curve *c, ec *p,
478 PyObject *x, PyObject *y, PyObject *z)
479{
480 int rc = -1;
481
482 if (!x || !y || !z) TYERR("missing argument");
483 if (!c) VALERR("internal form with no curve!");
2ee1ed30
MW		 484 if ((p->x = coord_in(c->f, x)) == 0 ||
485 (p->y = coord_in(c->f, y)) == 0 ||
486 (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
d7ab1bab 487 goto end;
488 if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
489 rc = 0;
490end:
491 return (rc);
492}
493
494static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y)
495{
496 int rc = -1;
497
498 if (!x || !y) TYERR("missing argument");
499 if ((p->x = getmp(x)) == 0 ||
500 (p->y = getmp(y)) == 0)
501 goto end;
502 if (c) EC_IN(c, p, p);
503 rc = 0;
504end:
505 return (rc);
506}
507
508static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
509{
510 int rc = -1;
511 PyObject *y = 0, *z = 0, *t = 0;
512 mp *xx = 0;
513 const void *q;
8ebf420c 514 Py_ssize_t n;
d7ab1bab 515 qd_parse qd;
516
517 Py_XINCREF(x);
518 if (!x || x == Py_None)
519 /*cool*/;
520 else if (ECPT_PYCHECK(x)) {
521 getecptout(p, x);
522 goto fix;
523 } else if (PyString_Check(x)) {
ba033513 524 if (PyObject_AsReadBuffer(x, &q, &n))
d7ab1bab 525 goto end;
526 qd.p = q;
527 qd.e = 0;
528 if (!ec_ptparse(&qd, p))
80f7cd89 529 VALERR(qd.e);
d7ab1bab 530 goto fix;
531 } else if (c && (xx = tomp(x)) != 0) {
532 xx = F_IN(c->f, xx, xx);
533 if (!EC_FIND(c, p, xx)) VALERR("not on the curve");
534 } else if (PySequence_Check(x)) {
535 t = x; x = 0;
4281a7ee 536 n = PySequence_Size(t); if (n < 0) goto end;
d7ab1bab 537 if (n != 2 && (n != 3 || !c))
538 TYERR("want sequence of two or three items");
539 if ((x = PySequence_GetItem(t, 0)) == 0 ||
540 (y = PySequence_GetItem(t, 1)) == 0 ||
541 (n == 3 && (z = PySequence_GetItem(t, 2)) == 0))
542 goto end;
543 rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z);
e91150b2 544 goto end;
d7ab1bab 545 } else
546 TYERR("can't convert to curve point");
547 goto ok;
548
549fix:
550 if (c) EC_IN(c, p, p);
551ok:
552 rc = 0;
553end:
554 Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t);
555 mp_drop(xx);
556 return (rc);
557}
558
559static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z)
560{
561 if (z)
562 return (ecptxl_3(c, p, x, y, z));
563 else if (y)
564 return (ecptxl_2(c, p, x, y));
565 else
566 return (ecptxl_1(c, p, x));
567}
568
d7ab1bab 569static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
570{
571 PyObject *x = 0, *y = 0, *z = 0;
572 ec p = EC_INIT;
827f89d7 573 static const char *const kwlist[] = { "x", "y", 0 };
d7ab1bab 574
827f89d7 575 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &x, &y) ||
d7ab1bab 576 ecptxl(0, &p, x, y, z))
577 goto end;
578 return (ecpt_pywrapout(ty, &p));
579end:
08720fe0 580 mp_drop(p.x); mp_drop(p.y); mp_drop(p.z);
d7ab1bab 581 return (0);
582}
583
584static PyObject *ecpt_pyint(PyObject *me)
585{
586 ec p = EC_INIT;
587 long l;
588 PyObject *rc = 0;
589 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
590 getecptout(&p, me);
bc243788
MW		 591 if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
592 else rc = mp_topylong(p.x);
d7ab1bab 593end:
594 EC_DESTROY(&p);
595 return (rc);
596}
597
598static PyObject *ecpt_pylong(PyObject *me)
599{
600 ec p = EC_INIT;
601 PyObject *rc = 0;
602 if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
603 getecptout(&p, me);
f368b46e 604 rc = mp_topylong(p.x);
d7ab1bab 605end:
606 EC_DESTROY(&p);
607 return (rc);
608}
609
610static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
611{
612 PyObject *x = 0, *y = 0, *z = 0;
613 ec p = EC_INIT;
827f89d7 614 static const char *const kwlist[] = { "x", "y", "z", 0 };
d7ab1bab 615
827f89d7 616 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", KWLIST,
d7ab1bab 617 &x, &y, &z) ||
618 ecptxl(ECCURVE_C(ty), &p, x, y, z))
619 goto end;
620 return (ecpt_pywrap((PyObject *)ty, &p));
621end:
08720fe0 622 mp_drop(p.x); mp_drop(p.y); mp_drop(p.z);
d7ab1bab 623 return (0);
624}
625
c90f712e 626static const PyGetSetDef ecptnc_pygetset[] = {
d7ab1bab 627#define GETSETNAME(op, name) epnc##op##_##name
628 GET (ix, "P.ix -> integer x coordinate of P")
629 GET (iy, "P.iy -> integer y coordinate of P")
630 GET (point, "P.point -> standalone curve point (no-op)")
631#undef GETSETNAME
632 { 0 }
633};
634
c90f712e 635static const PyMethodDef ecptnc_pymethods[] = {
d7ab1bab 636#define METHNAME(func) epmeth_##func
91e56f06 637 NAMETH(tobuf, "X.tobuf() -> BIN")
a157093f
MW		 638 CMTH (frombuf, "frombuf(STR) -> (P, REST)")
639 CMTH (parse, "parse(STR) -> (P, REST)")
d7ab1bab 640#undef METHNAME
641 { 0 }
642};
643
c90f712e 644static const PyNumberMethods ecpt_pynumber = {
d7ab1bab 645 0, /* @nb_add@ */
646 0, /* @nb_subtract@ */
647 0, /* @nb_multiply@ */
648 0, /* @nb_divide@ */
649 0, /* @nb_remainder@ */
650 0, /* @nb_divmod@ */
651 0, /* @nb_power@ */
652 0, /* @nb_negative@ */
653 0, /* @nb_positive@ */
654 0, /* @nb_absolute@ */
655 ecpt_pynonzerop, /* @nb_nonzero@ */
656 0, /* @nb_invert@ */
657 0, /* @nb_lshift@ */
658 0, /* @nb_rshift@ */
659 0, /* @nb_and@ */
660 0, /* @nb_xor@ */
661 0, /* @nb_or@ */
662 0, /* @nb_coerce@ */
663 ecpt_pyint, /* @nb_int@ */
664 ecpt_pylong, /* @nb_long@ */
665 0, /* @nb_float@ */
666 0, /* @nb_oct@ */
667 0, /* @nb_hex@ */
668
669 0, /* @nb_inplace_add@ */
670 0, /* @nb_inplace_subtract@ */
671 0, /* @nb_inplace_multiply@ */
672 0, /* @nb_inplace_divide@ */
673 0, /* @nb_inplace_remainder@ */
674 0, /* @nb_inplace_power@ */
675 0, /* @nb_inplace_lshift@ */
676 0, /* @nb_inplace_rshift@ */
677 0, /* @nb_inplace_and@ */
678 0, /* @nb_inplace_xor@ */
679 0, /* @nb_inplace_or@ */
680
681 0, /* @nb_floor_divide@ */
682 0, /* @nb_true_divide@ */
683 0, /* @nb_inplace_floor_divide@ */
684 0, /* @nb_inplace_true_divide@ */
685};
686
c263b05c 687static const PyTypeObject ecpt_pytype_skel = {
6d4db0bf 688 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 689 "ECPt", /* @tp_name@ */
d7ab1bab 690 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
691 0, /* @tp_itemsize@ */
692
693 ecpt_pydealloc, /* @tp_dealloc@ */
694 0, /* @tp_print@ */
695 0, /* @tp_getattr@ */
696 0, /* @tp_setattr@ */
697 0, /* @tp_compare@ */
698 0, /* @tp_repr@ */
c90f712e 699 PYNUMBER(ecpt), /* @tp_as_number@ */
d7ab1bab 700 0, /* @tp_as_sequence@ */
701 0, /* @tp_as_mapping@ */
702 ecpt_pyhash, /* @tp_hash@ */
703 0, /* @tp_call@ */
704 0, /* @tp_str@ */
705 0, /* @tp_getattro@ */
706 0, /* @tp_setattro@ */
707 0, /* @tp_as_buffer@ */
708 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
709 Py_TPFLAGS_CHECKTYPES |
710 Py_TPFLAGS_BASETYPE,
711
712 /* @tp_doc@ */
d96c882e
MW		 713 "ECPt([X, [Y]]): elliptic curve points, not associated with any curve.\n"
714 " X alone may be None, an existing point, a string 'X, Y', an\n"
715 " x-coordinate, or a pair (X, Y); X and Y should be a coordinate pair.",
d7ab1bab 716
717 0, /* @tp_traverse@ */
718 0, /* @tp_clear@ */
719 ecpt_pyrichcompare, /* @tp_richcompare@ */
720 0, /* @tp_weaklistoffset@ */
721 0, /* @tp_iter@ */
963a6148 722 0, /* @tp_iternext@ */
c90f712e 723 PYMETHODS(ecptnc), /* @tp_methods@ */
d7ab1bab 724 0, /* @tp_members@ */
c90f712e 725 PYGETSET(ecptnc), /* @tp_getset@ */
d7ab1bab 726 0, /* @tp_base@ */
727 0, /* @tp_dict@ */
728 0, /* @tp_descr_get@ */
729 0, /* @tp_descr_set@ */
730 0, /* @tp_dictoffset@ */
731 0, /* @tp_init@ */
732 PyType_GenericAlloc, /* @tp_alloc@ */
733 ecptnc_pynew, /* @tp_new@ */
3aa33042 734 0, /* @tp_free@ */
d7ab1bab 735 0 /* @tp_is_gc@ */
736};
737
8e923c68
MW		 738static const PyMemberDef ecpt_pymembers[] = {
739#define MEMBERSTRUCT ecpt_pyobj
740 MEMRNM(curve, T_OBJECT, ob_type, READONLY,
741 "P.curve -> elliptic curve containing P")
742#undef MEMBERSTRUCT
743 { 0 }
744};
745
c90f712e 746static const PyGetSetDef ecpt_pygetset[] = {
d7ab1bab 747#define GETSETNAME(op, name) ep##op##_##name
d7ab1bab 748 GET (point, "P.point -> standalone curve point")
749 GET (x, "P.x -> Cartesian x coordinate of P")
750 GET (y, "P.y -> Cartesian y coordinate of P")
751 GET (_x, "P._x -> internal x coordinate of P")
752 GET (_y, "P._y -> internal y coordinate of P")
753 GET (_z, "P._z -> internal z coordinate of P, or None")
754#undef GETSETNAME
755 { 0 }
756};
757
c90f712e 758static const PyMethodDef ecpt_pymethods[] = {
d7ab1bab 759#define METHNAME(func) epmeth_##func
91e56f06 760 NAMETH(toraw, "X.toraw() -> BIN")
e12df5f3 761 KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
91e56f06
MW		 762 NAMETH(dbl, "X.dbl() -> X + X")
763 NAMETH(oncurvep, "X.oncurvep() -> BOOL")
a157093f
MW		 764 CMTH (fromraw, "fromraw(STR) -> (P, REST)")
765 KWCMTH(os2ecp, "os2ecp(STR, [flags = ...]) -> (P, REST)")
d7ab1bab 766#undef METHNAME
767 { 0 }
768};
769
c90f712e 770static const PyNumberMethods ecptcurve_pynumber = {
d7ab1bab 771 ecpt_pyadd, /* @nb_add@ */
772 ecpt_pysub, /* @nb_subtract@ */
773 ecpt_pymul, /* @nb_multiply@ */
774 0, /* @nb_divide@ */
775 0, /* @nb_remainder@ */
776 0, /* @nb_divmod@ */
777 0, /* @nb_power@ */
778 ecpt_pyneg, /* @nb_negative@ */
779 ecpt_pyid, /* @nb_positive@ */
780 0, /* @nb_absolute@ */
781 0, /* @nb_nonzero@ */
782 0, /* @nb_invert@ */
783 0, /* @nb_lshift@ */
784 0, /* @nb_rshift@ */
785 0, /* @nb_and@ */
786 0, /* @nb_xor@ */
787 0, /* @nb_or@ */
788 0, /* @nb_coerce@ */
789 0, /* @nb_int@ */
790 0, /* @nb_long@ */
791 0, /* @nb_float@ */
792 0, /* @nb_oct@ */
793 0, /* @nb_hex@ */
794
795 0, /* @nb_inplace_add@ */
796 0, /* @nb_inplace_subtract@ */
797 0, /* @nb_inplace_multiply@ */
798 0, /* @nb_inplace_divide@ */
799 0, /* @nb_inplace_remainder@ */
800 0, /* @nb_inplace_power@ */
801 0, /* @nb_inplace_lshift@ */
802 0, /* @nb_inplace_rshift@ */
803 0, /* @nb_inplace_and@ */
804 0, /* @nb_inplace_xor@ */
805 0, /* @nb_inplace_or@ */
806
807 0, /* @nb_floor_divide@ */
808 0, /* @nb_true_divide@ */
809 0, /* @nb_inplace_floor_divide@ */
810 0, /* @nb_inplace_true_divide@ */
811};
812
c263b05c 813static const PyTypeObject ecptcurve_pytype_skel = {
6d4db0bf 814 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 815 "ECPtCurve", /* @tp_name@ */
d7ab1bab 816 sizeof(ecpt_pyobj), /* @tp_basicsize@ */
817 0, /* @tp_itemsize@ */
818
819 ecpt_pydealloc, /* @tp_dealloc@ */
820 0, /* @tp_print@ */
821 0, /* @tp_getattr@ */
822 0, /* @tp_setattr@ */
823 0, /* @tp_compare@ */
824 0, /* @tp_repr@ */
c90f712e 825 PYNUMBER(ecptcurve), /* @tp_as_number@ */
d7ab1bab 826 0, /* @tp_as_sequence@ */
827 0, /* @tp_as_mapping@ */
828 0, /* @tp_hash@ */
829 0, /* @tp_call@ */
830 0, /* @tp_str@ */
831 0, /* @tp_getattro@ */
832 0, /* @tp_setattro@ */
833 0, /* @tp_as_buffer@ */
834 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
835 Py_TPFLAGS_CHECKTYPES |
836 Py_TPFLAGS_BASETYPE,
837
838 /* @tp_doc@ */
d96c882e 839 "Elliptic curve points; abstract base class for points on given curves.",
d7ab1bab 840
841 0, /* @tp_traverse@ */
842 0, /* @tp_clear@ */
843 0, /* @tp_richcompare@ */
844 0, /* @tp_weaklistoffset@ */
845 0, /* @tp_iter@ */
963a6148 846 0, /* @tp_iternext@ */
c90f712e 847 PYMETHODS(ecpt), /* @tp_methods@ */
8e923c68 848 PYMEMBERS(ecpt), /* @tp_members@ */
c90f712e 849 PYGETSET(ecpt), /* @tp_getset@ */
d7ab1bab 850 0, /* @tp_base@ */
851 0, /* @tp_dict@ */
852 0, /* @tp_descr_get@ */
853 0, /* @tp_descr_set@ */
854 0, /* @tp_dictoffset@ */
855 0, /* @tp_init@ */
856 PyType_GenericAlloc, /* @tp_alloc@ */
857 abstract_pynew, /* @tp_new@ */
3aa33042 858 0, /* @tp_free@ */
d7ab1bab 859 0 /* @tp_is_gc@ */
860};
861
862/*----- Elliptic curves themselves ----------------------------------------*/
863
864static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
865{
7f8c2476
MW		 866 int b;
867
868 assert(ECCURVE_PYCHECK(x));
869 if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
870 b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
d7ab1bab 871 switch (op) {
872 case Py_EQ: break;
2c1ccbae 873 case Py_NE: b = !b; break;
d7ab1bab 874 default: TYERR("can't order elliptic curves");
875 }
876 return (getbool(b));
877end:
878 return (0);
879}
880
881static PyObject *ecmmul_id(PyObject *me)
882 { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); }
883
884static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
885{
886 ec_mulfactor *f = pp;
887
50bff227 888 EC_CREATE(&f->base);
d7ab1bab 889 if (getecpt(ECCURVE_C(me), &f->base, x) ||
890 (f->exp = getmp(m)) == 0)
891 return (-1);
d7ab1bab 892 return (0);
893}
894
895static PyObject *ecmmul_exp(PyObject *me, void *pp, int n)
896{
897 ec p = EC_INIT;
898 ec_immul(ECCURVE_C(me), &p, pp, n);
899 return (ecpt_pywrap(me, &p));
900}
901
902static void ecmmul_drop(void *pp)
903{
904 ec_mulfactor *f = pp;
905 EC_DESTROY(&f->base);
906 MP_DROP(f->exp);
907}
908
909static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
910{
911 return (mexp_common(me, arg, sizeof(ec_mulfactor),
912 ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop));
913}
914
d7ab1bab 915static void eccurve_pydealloc(PyObject *me)
916{
917 ec_destroycurve(ECCURVE_C(me));
918 Py_DECREF(ECCURVE_FOBJ(me));
919 PyType_Type.tp_dealloc(me);
920}
921
922static PyObject *ecmeth_find(PyObject *me, PyObject *arg)
923{
924 PyObject *x;
925 mp *xx = 0;
926 ec p = EC_INIT;
927 PyObject *rc = 0;
928
929 if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end;
930 if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f)
931 xx = MP_COPY(FE_X(x));
932 else if ((xx = getmp(x)) == 0)
933 goto end;
934 else
935 xx = F_IN(ECCURVE_C(me)->f, xx, xx);
936 if (EC_FIND(ECCURVE_C(me), &p, xx) == 0)
937 VALERR("not on the curve");
938 rc = ecpt_pywrap(me, &p);
939end:
940 if (xx) MP_DROP(xx);
941 return (rc);
942}
943
944static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
945{
827f89d7 946 static const char *const kwlist[] = { "rng", 0 };
d7ab1bab 947 grand *r = &rand_global;
948 ec p = EC_INIT;
949
827f89d7 950 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", KWLIST,
d7ab1bab 951 convgrand, &r))
952 return (0);
953 ec_rand(ECCURVE_C(me), &p, r);
954 EC_IN(ECCURVE_C(me), &p, &p);
955 return (ecpt_pywrap(me, &p));
956}
957
a157093f 958static PyObject *ecmeth_parse(PyObject *me, PyObject *arg)
f281293c
MW		 959{
960 char *p;
961 qd_parse qd;
962 ec_curve *c;
963 PyObject *rc = 0;
964
a157093f 965 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
f281293c
MW		 966 qd.p = p; qd.e = 0;
967 if ((c = ec_curveparse(&qd)) == 0) VALERR(qd.e);
968 rc = eccurve_pywrap(0, c);
969end:
970 return (rc);
971}
972
d7ab1bab 973static PyObject *eccurve_dopywrap(PyTypeObject *ty,
974 PyObject *fobj, ec_curve *c)
975{
df9f8366 976 eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name);
d7ab1bab 977 cobj->c = c;
978 cobj->fobj = fobj;
24b3d57b
MW		 979 cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj);
980 cobj->ty.ht_type.tp_base = ecptcurve_pytype;
d7ab1bab 981 Py_INCREF(ecptcurve_pytype);
24b3d57b
MW		 982 cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
983 Py_TPFLAGS_BASETYPE |
984 Py_TPFLAGS_CHECKTYPES |
985 Py_TPFLAGS_HEAPTYPE);
986 cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
987 cobj->ty.ht_type.tp_free = 0;
988 cobj->ty.ht_type.tp_new = ecpt_pynew;
dc075750 989 typeready(&cobj->ty.ht_type);
d7ab1bab 990 return ((PyObject *)cobj);
991}
992
993PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c)
994{
995 PyTypeObject *ty;
996
997 if (!fobj)
998 fobj = field_pywrap(c->f);
999 else
1000 Py_INCREF(fobj);
1001 assert(FIELD_F(fobj) == c->f);
20441612 1002 if (STRCMP(EC_NAME(c), ==, "prime"))
d7ab1bab 1003 ty = ecprimecurve_pytype;
20441612 1004 else if (STRCMP(EC_NAME(c), ==, "primeproj"))
d7ab1bab 1005 ty = ecprimeprojcurve_pytype;
20441612 1006 else if (STRCMP(EC_NAME(c), ==, "bin"))
d7ab1bab 1007 ty = ecbincurve_pytype;
20441612 1008 else if (STRCMP(EC_NAME(c), ==, "binproj"))
d7ab1bab 1009 ty = ecbinprojcurve_pytype;
1010 else
1011 abort();
1012 return (eccurve_dopywrap(ty, fobj, c));
1013}
1014
1015static PyObject *eccurve_pynew(PyTypeObject *ty,
1016 ec_curve *(*make)(field *, mp *, mp *),
1017 PyObject *arg, PyObject *kw)
1018{
1019 PyObject *fobj;
1020 PyObject *cobj = 0;
827f89d7 1021 static const char *const kwlist[] = { "field", "a", "b", 0 };
d7ab1bab 1022 mp *aa = 0, *bb = 0;
1023
827f89d7 1024 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", KWLIST,
d7ab1bab 1025 field_pytype, &fobj,
1026 convmp, &aa, convmp, &bb))
1027 goto end;
1028 Py_INCREF(fobj);
1029 cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb));
1030end:
1031 if (aa) MP_DROP(aa);
1032 if (bb) MP_DROP(bb);
1033 return (cobj);
1034}
1035
d7ab1bab 1036static PyObject *ecget_name(PyObject *me, void *hunoz)
1037 { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); }
1038
1039static PyObject *ecget_a(PyObject *me, void *hunoz)
1040 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
1041
b2687a0a 1042static PyObject *ecget_b(PyObject *me, void *hunoz)
d7ab1bab 1043 { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
1044
1045static PyObject *ecget_field(PyObject *me, void *hunoz)
1046 { RETURN_OBJ(ECCURVE_FOBJ(me)); }
1047
1048static PyObject *ecget_inf(PyObject *me, void *hunoz)
1049 { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); }
1050
c90f712e 1051static const PyGetSetDef eccurve_pygetset[] = {
d7ab1bab 1052#define GETSETNAME(op, name) ec##op##_##name
1053 GET (name, "E.name -> name of this kind of curve")
1054 GET (a, "E.a -> first parameter of curve")
1055 GET (b, "E.b -> second parameter of curve")
1056 GET (field, "E.field -> finite field containing this curve")
1057 GET (inf, "E.inf -> point at infinity of this curve")
1058#undef GETSETNAME
1059 { 0 }
b2687a0a 1060};
d7ab1bab 1061
c90f712e 1062static const PyMethodDef eccurve_pymethods[] = {
d7ab1bab 1063#define METHNAME(name) ecmeth_##name
d96c882e 1064 METH (mmul, "E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...")
d7ab1bab 1065 METH (find, "E.find(X) -> P")
1df8d5fe 1066 KWMETH(rand, "E.rand([rng = rand]) -> P")
a157093f 1067 SMTH (parse, "parse(STR) -> (E, REST)")
d7ab1bab 1068#undef METHNAME
1069 { 0 }
1070};
1071
c263b05c 1072static const PyTypeObject eccurve_pytype_skel = {
6d4db0bf 1073 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1074 "ECCurve", /* @tp_name@ */
d7ab1bab 1075 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1076 0, /* @tp_itemsize@ */
1077
1078 eccurve_pydealloc, /* @tp_dealloc@ */
1079 0, /* @tp_print@ */
1080 0, /* @tp_getattr@ */
1081 0, /* @tp_setattr@ */
1082 0, /* @tp_compare@ */
1083 0, /* @tp_repr@ */
1084 0, /* @tp_as_number@ */
1085 0, /* @tp_as_sequence@ */
1086 0, /* @tp_as_mapping@ */
1087 0, /* @tp_hash@ */
1088 0, /* @tp_call@ */
1089 0, /* @tp_str@ */
1090 0, /* @tp_getattro@ */
1091 0, /* @tp_setattro@ */
1092 0, /* @tp_as_buffer@ */
1093 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1094 Py_TPFLAGS_BASETYPE,
1095
1096 /* @tp_doc@ */
d96c882e 1097 "An elliptic curve. Abstract class.",
d7ab1bab 1098
1099 0, /* @tp_traverse@ */
1100 0, /* @tp_clear@ */
1101 eccurve_pyrichcompare, /* @tp_richcompare@ */
1102 0, /* @tp_weaklistoffset@ */
1103 0, /* @tp_iter@ */
963a6148 1104 0, /* @tp_iternext@ */
c90f712e 1105 PYMETHODS(eccurve), /* @tp_methods@ */
d7ab1bab 1106 0, /* @tp_members@ */
c90f712e 1107 PYGETSET(eccurve), /* @tp_getset@ */
d7ab1bab 1108 0, /* @tp_base@ */
1109 0, /* @tp_dict@ */
1110 0, /* @tp_descr_get@ */
1111 0, /* @tp_descr_set@ */
1112 0, /* @tp_dictoffset@ */
1113 0, /* @tp_init@ */
1114 PyType_GenericAlloc, /* @tp_alloc@ */
1115 abstract_pynew, /* @tp_new@ */
3aa33042 1116 0, /* @tp_free@ */
d7ab1bab 1117 0 /* @tp_is_gc@ */
1118};
1119
1120static PyObject *ecprimecurve_pynew(PyTypeObject *ty,
1121 PyObject *arg, PyObject *kw)
1122{
1123 return (eccurve_pynew(ty, ec_prime, arg, kw));
1124}
1125
c263b05c 1126static const PyTypeObject ecprimecurve_pytype_skel = {
6d4db0bf 1127 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1128 "ECPrimeCurve", /* @tp_name@ */
d7ab1bab 1129 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1130 0, /* @tp_itemsize@ */
1131
1132 eccurve_pydealloc, /* @tp_dealloc@ */
1133 0, /* @tp_print@ */
1134 0, /* @tp_getattr@ */
1135 0, /* @tp_setattr@ */
1136 0, /* @tp_compare@ */
1137 0, /* @tp_repr@ */
1138 0, /* @tp_as_number@ */
1139 0, /* @tp_as_sequence@ */
1140 0, /* @tp_as_mapping@ */
1141 0, /* @tp_hash@ */
1142 0, /* @tp_call@ */
1143 0, /* @tp_str@ */
1144 0, /* @tp_getattro@ */
1145 0, /* @tp_setattro@ */
1146 0, /* @tp_as_buffer@ */
1147 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1148 Py_TPFLAGS_BASETYPE,
1149
1150 /* @tp_doc@ */
d96c882e
MW		 1151 "ECPrimeCurve(FIELD, A, B): an elliptic curve over a prime field.\n"
1152 " Use ECPrimeProjCurve instead.",
d7ab1bab 1153
1154 0, /* @tp_traverse@ */
1155 0, /* @tp_clear@ */
1156 eccurve_pyrichcompare, /* @tp_richcompare@ */
1157 0, /* @tp_weaklistoffset@ */
1158 0, /* @tp_iter@ */
963a6148 1159 0, /* @tp_iternext@ */
d7ab1bab 1160 0, /* @tp_methods@ */
1161 0, /* @tp_members@ */
1162 0, /* @tp_getset@ */
1163 0, /* @tp_base@ */
1164 0, /* @tp_dict@ */
1165 0, /* @tp_descr_get@ */
1166 0, /* @tp_descr_set@ */
1167 0, /* @tp_dictoffset@ */
1168 0, /* @tp_init@ */
1169 PyType_GenericAlloc, /* @tp_alloc@ */
1170 ecprimecurve_pynew, /* @tp_new@ */
3aa33042 1171 0, /* @tp_free@ */
d7ab1bab 1172 0 /* @tp_is_gc@ */
1173};
1174
1175static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty,
1176 PyObject *arg, PyObject *kw)
1177{
1178 return (eccurve_pynew(ty, ec_primeproj, arg, kw));
1179}
1180
c263b05c 1181static const PyTypeObject ecprimeprojcurve_pytype_skel = {
6d4db0bf 1182 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1183 "ECPrimeProjCurve", /* @tp_name@ */
d7ab1bab 1184 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1185 0, /* @tp_itemsize@ */
1186
1187 eccurve_pydealloc, /* @tp_dealloc@ */
1188 0, /* @tp_print@ */
1189 0, /* @tp_getattr@ */
1190 0, /* @tp_setattr@ */
1191 0, /* @tp_compare@ */
1192 0, /* @tp_repr@ */
1193 0, /* @tp_as_number@ */
1194 0, /* @tp_as_sequence@ */
1195 0, /* @tp_as_mapping@ */
1196 0, /* @tp_hash@ */
1197 0, /* @tp_call@ */
1198 0, /* @tp_str@ */
1199 0, /* @tp_getattro@ */
1200 0, /* @tp_setattro@ */
1201 0, /* @tp_as_buffer@ */
1202 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1203 Py_TPFLAGS_BASETYPE,
1204
1205 /* @tp_doc@ */
d96c882e
MW		 1206 "ECPrimeProjCurve(FIELD, A, B): an elliptic curve over a prime field\n"
1207 " using projective coordinates.",
d7ab1bab 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 ecprimeprojcurve_pynew, /* @tp_new@ */
3aa33042 1226 0, /* @tp_free@ */
d7ab1bab 1227 0 /* @tp_is_gc@ */
1228};
1229
1230static PyObject *ecbincurve_pynew(PyTypeObject *ty,
1231 PyObject *arg, PyObject *kw)
1232{
1233 return (eccurve_pynew(ty, ec_bin, arg, kw));
1234}
1235
c263b05c 1236static const PyTypeObject ecbincurve_pytype_skel = {
6d4db0bf 1237 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1238 "ECBinCurve", /* @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@ */
d96c882e
MW		 1261 "ECBinCurve(FIELD, A, B): an elliptic curve over a binary field.\n"
1262 " Use ECBinProjCurve instead.",
d7ab1bab 1263
1264 0, /* @tp_traverse@ */
1265 0, /* @tp_clear@ */
1266 eccurve_pyrichcompare, /* @tp_richcompare@ */
1267 0, /* @tp_weaklistoffset@ */
1268 0, /* @tp_iter@ */
963a6148 1269 0, /* @tp_iternext@ */
d7ab1bab 1270 0, /* @tp_methods@ */
1271 0, /* @tp_members@ */
1272 0, /* @tp_getset@ */
1273 0, /* @tp_base@ */
1274 0, /* @tp_dict@ */
1275 0, /* @tp_descr_get@ */
1276 0, /* @tp_descr_set@ */
1277 0, /* @tp_dictoffset@ */
1278 0, /* @tp_init@ */
1279 PyType_GenericAlloc, /* @tp_alloc@ */
1280 ecbincurve_pynew, /* @tp_new@ */
3aa33042 1281 0, /* @tp_free@ */
d7ab1bab 1282 0 /* @tp_is_gc@ */
1283};
1284
1285static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty,
1286 PyObject *arg, PyObject *kw)
1287{
1288 return (eccurve_pynew(ty, ec_binproj, arg, kw));
1289}
1290
c263b05c 1291static const PyTypeObject ecbinprojcurve_pytype_skel = {
6d4db0bf 1292 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1293 "ECBinProjCurve", /* @tp_name@ */
d7ab1bab 1294 sizeof(eccurve_pyobj), /* @tp_basicsize@ */
1295 0, /* @tp_itemsize@ */
1296
1297 eccurve_pydealloc, /* @tp_dealloc@ */
1298 0, /* @tp_print@ */
1299 0, /* @tp_getattr@ */
1300 0, /* @tp_setattr@ */
1301 0, /* @tp_compare@ */
1302 0, /* @tp_repr@ */
1303 0, /* @tp_as_number@ */
1304 0, /* @tp_as_sequence@ */
1305 0, /* @tp_as_mapping@ */
1306 0, /* @tp_hash@ */
1307 0, /* @tp_call@ */
1308 0, /* @tp_str@ */
1309 0, /* @tp_getattro@ */
1310 0, /* @tp_setattro@ */
1311 0, /* @tp_as_buffer@ */
1312 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1313 Py_TPFLAGS_BASETYPE,
1314
1315 /* @tp_doc@ */
d96c882e
MW		 1316 "ECBinProjCurve(FIELD, A, B): an elliptic curve over a binary field,\n"
1317 " using projective coordinates.",
d7ab1bab 1318
1319 0, /* @tp_traverse@ */
1320 0, /* @tp_clear@ */
1321 eccurve_pyrichcompare, /* @tp_richcompare@ */
1322 0, /* @tp_weaklistoffset@ */
1323 0, /* @tp_iter@ */
963a6148 1324 0, /* @tp_iternext@ */
d7ab1bab 1325 0, /* @tp_methods@ */
1326 0, /* @tp_members@ */
1327 0, /* @tp_getset@ */
1328 0, /* @tp_base@ */
1329 0, /* @tp_dict@ */
1330 0, /* @tp_descr_get@ */
1331 0, /* @tp_descr_set@ */
1332 0, /* @tp_dictoffset@ */
1333 0, /* @tp_init@ */
1334 PyType_GenericAlloc, /* @tp_alloc@ */
1335 ecbinprojcurve_pynew, /* @tp_new@ */
3aa33042 1336 0, /* @tp_free@ */
d7ab1bab 1337 0 /* @tp_is_gc@ */
1338};
1339
1340/*----- Curve info --------------------------------------------------------*/
1341
1342static int ncurves = -1;
1343
1344void ecinfo_copy(ec_info *eic, const ec_info *ei)
1345{
1346 eic->c = eccurve_copy(ei->c);
1347 EC_CREATE(&eic->g);
1348 EC_COPY(&eic->g, &ei->g);
1349 eic->r = MP_COPY(ei->r);
1350 eic->h = MP_COPY(ei->h);
1351}
1352
1353PyObject *ecinfo_pywrap(ec_info *ei)
1354{
1355 ecinfo_pyobj *o;
1356
1357 o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype);
1358 o->ei = *ei;
1359 o->cobj = eccurve_pywrap(0, o->ei.c);
1360 Py_INCREF(o->cobj);
1361 return ((PyObject *)o);
1362}
1363
1364static void ecinfo_pydealloc(PyObject *me)
1365{
1366 ec_info *ei = ECINFO_EI(me);
1367 EC_DESTROY(&ei->g);
1368 MP_DROP(ei->r);
1369 MP_DROP(ei->h);
1370 Py_DECREF(ECINFO_COBJ(me));
3aa33042 1371 FREEOBJ(me);
d7ab1bab 1372}
1373
1374static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1375{
1376 ec_info ei = { 0 };
1377 PyObject *e, *g;
827f89d7 1378 static const char *const kwlist[] = { "curve", "G", "r", "h", 0 };
d7ab1bab 1379 ecinfo_pyobj *rc = 0;
1380
827f89d7 1381 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", KWLIST,
d7ab1bab 1382 eccurve_pytype, &e, ecpt_pytype, &g,
1383 convmp, &ei.r, convmp, &ei.h))
1384 goto end;
1385 if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e)))
1386 TYERR("point not from this curve");
1387 ei.c = ECCURVE_C(e);
1388 EC_CREATE(&ei.g);
30720615 1389 EC_OUT(ei.c, &ei.g, ECPT_P(g));
d7ab1bab 1390 rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
1391 rc->ei = ei;
1392 rc->cobj = e;
1393 Py_INCREF(rc->cobj);
1394 return ((PyObject *)rc);
1395
1396end:
1397 mp_drop(ei.r);
1398 mp_drop(ei.h);
1399 return (0);
1400}
1401
a157093f 1402static PyObject *eimeth_parse(PyObject *me, PyObject *arg)
d7ab1bab 1403{
1404 char *p;
1405 qd_parse qd;
1406 ec_info ei;
1407 PyObject *rc = 0;
1408
a157093f 1409 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
f281293c
MW		 1410 qd.p = p; qd.e = 0;
1411 if (ec_infoparse(&qd, &ei)) VALERR(qd.e);
d7ab1bab 1412 rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
1413end:
1414 return (rc);
1415}
1416
a157093f 1417static PyObject *eimeth__curven(PyObject *me, PyObject *arg)
d7ab1bab 1418{
1419 int i;
1420 ec_info ei;
1421 PyObject *rc = 0;
1422
a157093f 1423 if (!PyArg_ParseTuple(arg, "i:_curven", &i)) goto end;
d7ab1bab 1424 if (i < 0 || i >= ncurves) VALERR("curve index out of range");
1425 ec_infofromdata(&ei, ectab[i].data);
1426 rc = ecinfo_pywrap(&ei);
1427end:
1428 return (rc);
1429}
1430
1431static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op)
1432{
1433 int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y));
1434 switch (op) {
1435 case Py_EQ: break;
1436 case Py_NE: b = !b;
1437 default: TYERR("can't order elliptic curve infos");
1438 }
1439 return (getbool(b));
1440end:
1441 return (0);
1442}
1443
1444static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw)
1445{
827f89d7 1446 static const char *const kwlist[] = { "rng", 0 };
d7ab1bab 1447 grand *r = &rand_global;
1448 const char *p;
1449
827f89d7 1450 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", KWLIST,
d7ab1bab 1451 convgrand, &r))
1452 goto end;
1453 if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0)
1454 VALERR(p);
1455 RETURN_ME;
1456end:
1457 return (0);
1458}
1459
1460static PyObject *eiget_curve(PyObject *me, void *hunoz)
1461 { RETURN_OBJ(ECINFO_COBJ(me)); }
1462
1463static PyObject *eiget_G(PyObject *me, void *hunoz)
1464{
1465 ec_info *ei = ECINFO_EI(me);
1466 ec p = EC_INIT;
1467 EC_IN(ei->c, &p, &ei->g);
1468 return (ecpt_pywrap(ECINFO_COBJ(me), &p));
1469}
1470
1471static PyObject *eiget_r(PyObject *me, void *hunoz)
1472 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); }
1473
1474static PyObject *eiget_h(PyObject *me, void *hunoz)
1475 { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); }
1476
c90f712e 1477static const PyGetSetDef ecinfo_pygetset[] = {
d7ab1bab 1478#define GETSETNAME(op, name) ei##op##_##name
1479 GET (curve, "I.curve -> the elliptic curve")
1480 GET (G, "I.G -> generator point for the group")
1481 GET (r, "I.r -> order of the group (and hence of G")
1482 GET (h, "I.h -> cofactor of the group")
1483#undef GETSETNAME
1484 { 0 }
1485};
1486
c90f712e 1487static const PyMethodDef ecinfo_pymethods[] = {
d7ab1bab 1488#define METHNAME(name) eimeth_##name
2465e84b 1489 KWMETH(check, "I.check([rng = rand]) -> None")
a157093f
MW		 1490 SMTH (parse, "parse(STR) -> (I, REST)")
1491 SMTH (_curven, "_curven(N) -> I")
d7ab1bab 1492#undef METHNAME
1493 { 0 }
1494};
1495
c263b05c 1496static const PyTypeObject ecinfo_pytype_skel = {
6d4db0bf 1497 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 1498 "ECInfo", /* @tp_name@ */
d7ab1bab 1499 sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
1500 0, /* @tp_itemsize@ */
1501
1502 ecinfo_pydealloc, /* @tp_dealloc@ */
1503 0, /* @tp_print@ */
1504 0, /* @tp_getattr@ */
1505 0, /* @tp_setattr@ */
1506 0, /* @tp_compare@ */
1507 0, /* @tp_repr@ */
1508 0, /* @tp_as_number@ */
1509 0, /* @tp_as_sequence@ */
1510 0, /* @tp_as_mapping@ */
1511 0, /* @tp_hash@ */
1512 0, /* @tp_call@ */
1513 0, /* @tp_str@ */
1514 0, /* @tp_getattro@ */
1515 0, /* @tp_setattro@ */
1516 0, /* @tp_as_buffer@ */
1517 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1518 Py_TPFLAGS_BASETYPE,
1519
1520 /* @tp_doc@ */
d96c882e 1521 "ECInfo(CURVE, G, R, H): elliptic curve domain parameters.",
d7ab1bab 1522
1523 0, /* @tp_traverse@ */
1524 0, /* @tp_clear@ */
1525 ecinfo_pyrichcompare, /* @tp_richcompare@ */
1526 0, /* @tp_weaklistoffset@ */
1527 0, /* @tp_iter@ */
963a6148 1528 0, /* @tp_iternext@ */
c90f712e 1529 PYMETHODS(ecinfo), /* @tp_methods@ */
d7ab1bab 1530 0, /* @tp_members@ */
c90f712e 1531 PYGETSET(ecinfo), /* @tp_getset@ */
d7ab1bab 1532 0, /* @tp_base@ */
1533 0, /* @tp_dict@ */
1534 0, /* @tp_descr_get@ */
1535 0, /* @tp_descr_set@ */
1536 0, /* @tp_dictoffset@ */
1537 0, /* @tp_init@ */
1538 PyType_GenericAlloc, /* @tp_alloc@ */
1539 ecinfo_pynew, /* @tp_new@ */
3aa33042 1540 0, /* @tp_free@ */
d7ab1bab 1541 0 /* @tp_is_gc@ */
1542};
1543
1544/*----- Setup -------------------------------------------------------------*/
1545
d7ab1bab 1546void ec_pyinit(void)
1547{
1548 INITTYPE(ecpt, root);
1549 INITTYPE(ecptcurve, ecpt);
1550 INITTYPE(eccurve, type);
1551 INITTYPE(ecprimecurve, eccurve);
1552 INITTYPE(ecprimeprojcurve, ecprimecurve);
1553 INITTYPE(ecbincurve, eccurve);
1554 INITTYPE(ecbinprojcurve, ecbincurve);
1555 INITTYPE(ecinfo, root);
d7ab1bab 1556}
1557
1558static PyObject *namedcurves(void)
1559{
1560 int i, j;
1561 const char *p;
1562 PyObject *d, *c;
1563
1564 d = PyDict_New();
1565 for (i = 0; ectab[i].name; i++) {
1566 p = ectab[i].name;
1567 for (j = 0; j < i; j++) {
1568 if (ectab[i].data == ectab[j].data) {
1569 c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name);
1570 Py_INCREF(c);
1571 goto found;
1572 }
1573 }
1574 c = PyInt_FromLong(i);
1575 found:
98963817 1576 PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
d7ab1bab 1577 Py_DECREF(c);
1578 }
1579 ncurves = i;
1580 return (d);
1581}
1582
1583void ec_pyinsert(PyObject *mod)
1584{
1585 INSERT("ECPt", ecpt_pytype);
1586 INSERT("ECPtCurve", ecptcurve_pytype);
1587 INSERT("ECCurve", eccurve_pytype);
1588 INSERT("ECPrimeCurve", ecprimecurve_pytype);
1589 INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype);
1590 INSERT("ECBinCurve", ecbincurve_pytype);
1591 INSERT("ECBinProjCurve", ecbinprojcurve_pytype);
1592 INSERT("ECInfo", ecinfo_pytype);
1593 INSERT("_eccurves", namedcurves());
1594}
1595
1596/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings