Commit | Line | Data |
---|---|---|
d7ab1bab | 1 | /* -*-c-*- |
2 | * | |
d7ab1bab | 3 | * Elliptic curves |
4 | * | |
5 | * (c) 2004 Straylight/Edgeware | |
6 | */ | |
7 | ||
b2687a0a | 8 | /*----- Licensing notice --------------------------------------------------* |
d7ab1bab | 9 | * |
10 | * This file is part of the Python interface to Catacomb. | |
11 | * | |
12 | * Catacomb/Python is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
b2687a0a | 16 | * |
d7ab1bab | 17 | * Catacomb/Python is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
b2687a0a | 21 | * |
d7ab1bab | 22 | * You should have received a copy of the GNU General Public License |
23 | * along with Catacomb/Python; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
27 | /*----- Header files ------------------------------------------------------*/ | |
28 | ||
29 | #include "catacomb-python.h" | |
30 | ||
31 | /*----- Utility functions -------------------------------------------------*/ | |
32 | ||
33 | PyTypeObject *ecpt_pytype; | |
34 | PyTypeObject *ecptcurve_pytype; | |
35 | PyTypeObject *eccurve_pytype; | |
36 | PyTypeObject *ecprimecurve_pytype; | |
37 | PyTypeObject *ecprimeprojcurve_pytype; | |
38 | PyTypeObject *ecbincurve_pytype; | |
39 | PyTypeObject *ecbinprojcurve_pytype; | |
40 | PyTypeObject *ecinfo_pytype; | |
41 | ||
42 | ec_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 | ||
67 | static 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 | ||
76 | PyObject *ecpt_pywrap(PyObject *cobj, ec *p) | |
77 | { return (ecpt_dopywrap(cobj, ECCURVE_C(cobj), p)); } | |
78 | ||
79 | PyObject *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 | ||
92 | int 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 | ||
105 | int 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", | |
2a448f86 | 109 | Py_TYPE(p)->tp_name); |
d7ab1bab | 110 | return (-1); |
111 | } | |
112 | return (0); | |
113 | } | |
114 | ||
115 | void 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 | ||
125 | int convecpt(PyObject *o, void *p) | |
126 | { | |
127 | if (!ECPT_PYCHECK(o)) | |
128 | TYERR("want elliptic curve point"); | |
129 | getecptout(p, o); | |
130 | return (1); | |
131 | end: | |
132 | return (0); | |
133 | } | |
134 | ||
135 | /*----- Curve points ------------------------------------------------------*/ | |
136 | ||
137 | static 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 | } | |
158 | BINOP(add) | |
159 | BINOP(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 | } | |
169 | UNOP(neg) | |
170 | #undef UNOP | |
171 | ||
172 | static PyObject *ecpt_pyid(PyObject *x) { RETURN_OBJ(x); } | |
173 | ||
174 | static int ecpt_pynonzerop(PyObject *x) { return (!EC_ATINF(ECPT_P(x))); } | |
175 | ||
176 | static 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 | ||
183 | static 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 | ||
d6d78edc | 195 | static Py_hash_t ecpt_pyhash(PyObject *me) |
d7ab1bab | 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 | ||
207 | static 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); | |
222 | end: | |
223 | EC_DESTROY(&p); | |
224 | EC_DESTROY(&q); | |
225 | return (rc); | |
226 | } | |
227 | ||
91e56f06 | 228 | static 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 | 234 | static 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 | 241 | static 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); |
2135a6d3 | 254 | buf_init(&b, BIN_PTR(rc), n); |
d7ab1bab | 255 | buf_putec(&b, &p); |
256 | assert(BOK(&b)); | |
2135a6d3 | 257 | BIN_SETLEN(rc, BLEN(&b)); |
d7ab1bab | 258 | EC_DESTROY(&p); |
259 | return (rc); | |
260 | } | |
261 | ||
91e56f06 | 262 | static 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); | |
2135a6d3 | 273 | p = BIN_PTR(rc); |
d7ab1bab | 274 | buf_init(&b, p, len); |
275 | EC_OUT(c, &pp, ECPT_P(me)); | |
276 | ec_putraw(c, &b, &pp); | |
277 | EC_DESTROY(&pp); | |
2135a6d3 | 278 | BIN_SETLEN(rc, BLEN(&b)); |
d7ab1bab | 279 | return (rc); |
280 | } | |
281 | ||
e12df5f3 MW |
282 | static 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); | |
2135a6d3 | 298 | p = BIN_PTR(rc); |
e12df5f3 MW |
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); | |
2135a6d3 | 306 | BIN_SETLEN(rc, BLEN(&b)); |
e12df5f3 MW |
307 | end: |
308 | return (rc); | |
309 | } | |
310 | ||
a157093f | 311 | static PyObject *epmeth_frombuf(PyObject *me, PyObject *arg) |
f281293c | 312 | { |
67c75893 | 313 | struct bin in; |
f281293c | 314 | buf b; |
f281293c MW |
315 | PyObject *rc = 0; |
316 | ec pp = EC_INIT; | |
317 | ||
67c75893 MW |
318 | if (!PyArg_ParseTuple(arg, "O&:frombuf", convbin, &in)) goto end; |
319 | buf_init(&b, (/*unconst*/ void *)in.p, in.sz); | |
f281293c MW |
320 | if (buf_getec(&b, &pp)) VALERR("malformed data"); |
321 | rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp), | |
322 | bytestring_pywrapbuf(&b)); | |
323 | end: | |
324 | return (rc); | |
325 | } | |
326 | ||
a157093f | 327 | static PyObject *epmeth_parse(PyObject *me, PyObject *arg) |
f281293c MW |
328 | { |
329 | char *p; | |
330 | qd_parse qd; | |
331 | PyObject *rc = 0; | |
332 | ec pp = EC_INIT; | |
333 | ||
a157093f | 334 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
335 | qd.p = p; qd.e = 0; |
336 | if (!ec_ptparse(&qd, &pp)) VALERR(qd.e); | |
337 | rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p); | |
338 | end: | |
339 | return (rc); | |
340 | } | |
341 | ||
a157093f | 342 | static PyObject *epmeth_fromraw(PyObject *me, PyObject *arg) |
f281293c | 343 | { |
67c75893 | 344 | struct bin in; |
f281293c MW |
345 | buf b; |
346 | PyObject *rc = 0; | |
347 | ec_curve *cc; | |
348 | ec pp = EC_INIT; | |
349 | ||
67c75893 MW |
350 | if (!PyArg_ParseTuple(arg, "O&:fromraw", convbin, &in)) return (0); |
351 | buf_init(&b, (/*unconst*/ void *)in.p, in.sz); | |
f281293c MW |
352 | cc = ECCURVE_C(me); |
353 | if (ec_getraw(cc, &b, &pp)) | |
354 | VALERR("bad point"); | |
355 | EC_IN(cc, &pp, &pp); | |
356 | rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b)); | |
357 | end: | |
358 | return (rc); | |
359 | } | |
360 | ||
a157093f | 361 | static PyObject *epmeth_os2ecp(PyObject *me, PyObject *arg, PyObject *kw) |
f281293c | 362 | { |
67c75893 | 363 | struct bin in; |
f281293c MW |
364 | buf b; |
365 | PyObject *rc = 0; | |
366 | ec_curve *cc; | |
367 | unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY; | |
368 | ec pp = EC_INIT; | |
a157093f | 369 | static const char *const kwlist[] = { "buf", "flags", 0 }; |
f281293c | 370 | |
67c75893 MW |
371 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:os2ecp", KWLIST, |
372 | convbin, &in, convuint, &f)) | |
f281293c | 373 | return (0); |
67c75893 | 374 | buf_init(&b, (/*unconst*/ void *)in.p, in.sz); |
f281293c MW |
375 | cc = ECCURVE_C(me); |
376 | if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point"); | |
377 | EC_IN(cc, &pp, &pp); | |
378 | rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b)); | |
379 | end: | |
380 | return (rc); | |
381 | } | |
382 | ||
d7ab1bab | 383 | static PyObject *epncget_ix(PyObject *me, void *hunoz) |
384 | { | |
385 | ec p = EC_INIT; | |
386 | PyObject *rc; | |
387 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
388 | getecptout(&p, me); | |
389 | rc = mp_pywrap(MP_COPY(p.x)); | |
390 | EC_DESTROY(&p); | |
391 | return (rc); | |
392 | } | |
393 | ||
394 | static PyObject *epncget_iy(PyObject *me, void *hunoz) | |
395 | { | |
396 | ec p = EC_INIT; | |
397 | PyObject *rc; | |
398 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
399 | getecptout(&p, me); | |
400 | rc = mp_pywrap(MP_COPY(p.y)); | |
401 | EC_DESTROY(&p); | |
402 | return (rc); | |
403 | } | |
404 | ||
405 | static PyObject *epncget_point(PyObject *me, void *hunoz) | |
406 | { RETURN_ME; } | |
407 | ||
408 | static PyObject *epget_point(PyObject *me, void *hunoz) | |
409 | { | |
410 | ec p = EC_INIT; | |
411 | getecptout(&p, me); | |
412 | return (ecpt_pywrapout(ecpt_pytype, &p)); | |
413 | } | |
414 | ||
415 | static PyObject *epget_x(PyObject *me, void *hunoz) | |
416 | { | |
417 | ec_curve *c = ECPT_C(me); | |
418 | ec *pp = ECPT_P(me); | |
419 | PyObject *fobj = ECPT_FOBJ(me); | |
420 | ec p = EC_INIT; | |
421 | PyObject *rc; | |
422 | ||
423 | if (EC_ATINF(pp)) RETURN_NONE; | |
424 | EC_OUT(c, &p, pp); | |
425 | rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x)); | |
426 | EC_DESTROY(&p); | |
427 | return (rc); | |
428 | } | |
429 | ||
430 | static PyObject *epget_y(PyObject *me, void *hunoz) | |
431 | { | |
432 | ec_curve *c = ECPT_C(me); | |
433 | ec *pp = ECPT_P(me); | |
434 | PyObject *fobj = ECPT_FOBJ(me); | |
435 | ec p = EC_INIT; | |
436 | PyObject *rc; | |
437 | ||
438 | if (EC_ATINF(pp)) RETURN_NONE; | |
439 | EC_OUT(c, &p, pp); | |
440 | rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y)); | |
441 | EC_DESTROY(&p); | |
442 | return (rc); | |
443 | } | |
444 | ||
445 | static PyObject *epget__x(PyObject *me, void *hunoz) | |
446 | { | |
447 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
448 | return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->x))); | |
449 | } | |
450 | ||
451 | static PyObject *epget__y(PyObject *me, void *hunoz) | |
452 | { | |
453 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
454 | return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y))); | |
455 | } | |
456 | ||
457 | static PyObject *epget__z(PyObject *me, void *hunoz) | |
458 | { | |
459 | if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE; | |
460 | return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z))); | |
461 | } | |
462 | ||
463 | static mp *coord_in(field *f, PyObject *x) | |
464 | { | |
465 | mp *xx; | |
466 | if (FE_PYCHECK(x) && FE_F(x) == f) | |
467 | return (MP_COPY(FE_X(x))); | |
468 | else if ((xx = getmp(x)) == 0) | |
469 | return (0); | |
470 | else | |
471 | return (F_IN(f, xx, xx)); | |
472 | } | |
473 | ||
474 | static int ecptxl_3(ec_curve *c, ec *p, | |
475 | PyObject *x, PyObject *y, PyObject *z) | |
476 | { | |
477 | int rc = -1; | |
478 | ||
479 | if (!x || !y || !z) TYERR("missing argument"); | |
480 | if (!c) VALERR("internal form with no curve!"); | |
2ee1ed30 MW |
481 | if ((p->x = coord_in(c->f, x)) == 0 || |
482 | (p->y = coord_in(c->f, y)) == 0 || | |
483 | (z != Py_None && (p->z = coord_in(c->f, z)) == 0)) | |
d7ab1bab | 484 | goto end; |
485 | if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */ | |
486 | rc = 0; | |
487 | end: | |
488 | return (rc); | |
489 | } | |
490 | ||
491 | static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y) | |
492 | { | |
493 | int rc = -1; | |
494 | ||
495 | if (!x || !y) TYERR("missing argument"); | |
496 | if ((p->x = getmp(x)) == 0 || | |
497 | (p->y = getmp(y)) == 0) | |
498 | goto end; | |
499 | if (c) EC_IN(c, p, p); | |
500 | rc = 0; | |
501 | end: | |
502 | return (rc); | |
503 | } | |
504 | ||
505 | static int ecptxl_1(ec_curve *c, ec *p, PyObject *x) | |
506 | { | |
507 | int rc = -1; | |
508 | PyObject *y = 0, *z = 0, *t = 0; | |
509 | mp *xx = 0; | |
8ebf420c | 510 | Py_ssize_t n; |
d7ab1bab | 511 | qd_parse qd; |
512 | ||
513 | Py_XINCREF(x); | |
514 | if (!x || x == Py_None) | |
515 | /*cool*/; | |
516 | else if (ECPT_PYCHECK(x)) { | |
517 | getecptout(p, x); | |
518 | goto fix; | |
2135a6d3 MW |
519 | } else if (TEXT_CHECK(x)) { |
520 | qd.p = TEXT_PTR(x); | |
d7ab1bab | 521 | qd.e = 0; |
522 | if (!ec_ptparse(&qd, p)) | |
80f7cd89 | 523 | VALERR(qd.e); |
d7ab1bab | 524 | goto fix; |
525 | } else if (c && (xx = tomp(x)) != 0) { | |
526 | xx = F_IN(c->f, xx, xx); | |
527 | if (!EC_FIND(c, p, xx)) VALERR("not on the curve"); | |
528 | } else if (PySequence_Check(x)) { | |
529 | t = x; x = 0; | |
4281a7ee | 530 | n = PySequence_Size(t); if (n < 0) goto end; |
d7ab1bab | 531 | if (n != 2 && (n != 3 || !c)) |
532 | TYERR("want sequence of two or three items"); | |
533 | if ((x = PySequence_GetItem(t, 0)) == 0 || | |
534 | (y = PySequence_GetItem(t, 1)) == 0 || | |
535 | (n == 3 && (z = PySequence_GetItem(t, 2)) == 0)) | |
536 | goto end; | |
537 | rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z); | |
e91150b2 | 538 | goto end; |
d7ab1bab | 539 | } else |
540 | TYERR("can't convert to curve point"); | |
541 | goto ok; | |
542 | ||
543 | fix: | |
544 | if (c) EC_IN(c, p, p); | |
545 | ok: | |
546 | rc = 0; | |
547 | end: | |
548 | Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t); | |
549 | mp_drop(xx); | |
550 | return (rc); | |
551 | } | |
552 | ||
553 | static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z) | |
554 | { | |
555 | if (z) | |
556 | return (ecptxl_3(c, p, x, y, z)); | |
557 | else if (y) | |
558 | return (ecptxl_2(c, p, x, y)); | |
559 | else | |
560 | return (ecptxl_1(c, p, x)); | |
561 | } | |
562 | ||
d7ab1bab | 563 | static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) |
564 | { | |
565 | PyObject *x = 0, *y = 0, *z = 0; | |
566 | ec p = EC_INIT; | |
827f89d7 | 567 | static const char *const kwlist[] = { "x", "y", 0 }; |
d7ab1bab | 568 | |
827f89d7 | 569 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &x, &y) || |
d7ab1bab | 570 | ecptxl(0, &p, x, y, z)) |
571 | goto end; | |
572 | return (ecpt_pywrapout(ty, &p)); | |
573 | end: | |
08720fe0 | 574 | mp_drop(p.x); mp_drop(p.y); mp_drop(p.z); |
d7ab1bab | 575 | return (0); |
576 | } | |
577 | ||
578 | static PyObject *ecpt_pyint(PyObject *me) | |
579 | { | |
580 | ec p = EC_INIT; | |
581 | long l; | |
582 | PyObject *rc = 0; | |
583 | if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity"); | |
584 | getecptout(&p, me); | |
bc243788 MW |
585 | if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l); |
586 | else rc = mp_topylong(p.x); | |
d7ab1bab | 587 | end: |
588 | EC_DESTROY(&p); | |
589 | return (rc); | |
590 | } | |
591 | ||
592 | static PyObject *ecpt_pylong(PyObject *me) | |
593 | { | |
594 | ec p = EC_INIT; | |
595 | PyObject *rc = 0; | |
596 | if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity"); | |
597 | getecptout(&p, me); | |
f368b46e | 598 | rc = mp_topylong(p.x); |
d7ab1bab | 599 | end: |
600 | EC_DESTROY(&p); | |
601 | return (rc); | |
602 | } | |
603 | ||
604 | static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) | |
605 | { | |
606 | PyObject *x = 0, *y = 0, *z = 0; | |
607 | ec p = EC_INIT; | |
827f89d7 | 608 | static const char *const kwlist[] = { "x", "y", "z", 0 }; |
d7ab1bab | 609 | |
827f89d7 | 610 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", KWLIST, |
d7ab1bab | 611 | &x, &y, &z) || |
612 | ecptxl(ECCURVE_C(ty), &p, x, y, z)) | |
613 | goto end; | |
614 | return (ecpt_pywrap((PyObject *)ty, &p)); | |
615 | end: | |
08720fe0 | 616 | mp_drop(p.x); mp_drop(p.y); mp_drop(p.z); |
d7ab1bab | 617 | return (0); |
618 | } | |
619 | ||
c90f712e | 620 | static const PyGetSetDef ecptnc_pygetset[] = { |
d7ab1bab | 621 | #define GETSETNAME(op, name) epnc##op##_##name |
622 | GET (ix, "P.ix -> integer x coordinate of P") | |
623 | GET (iy, "P.iy -> integer y coordinate of P") | |
624 | GET (point, "P.point -> standalone curve point (no-op)") | |
625 | #undef GETSETNAME | |
626 | { 0 } | |
627 | }; | |
628 | ||
c90f712e | 629 | static const PyMethodDef ecptnc_pymethods[] = { |
d7ab1bab | 630 | #define METHNAME(func) epmeth_##func |
91e56f06 | 631 | NAMETH(tobuf, "X.tobuf() -> BIN") |
a157093f MW |
632 | CMTH (frombuf, "frombuf(STR) -> (P, REST)") |
633 | CMTH (parse, "parse(STR) -> (P, REST)") | |
d7ab1bab | 634 | #undef METHNAME |
635 | { 0 } | |
636 | }; | |
637 | ||
c90f712e | 638 | static const PyNumberMethods ecpt_pynumber = { |
d7ab1bab | 639 | 0, /* @nb_add@ */ |
640 | 0, /* @nb_subtract@ */ | |
641 | 0, /* @nb_multiply@ */ | |
642 | 0, /* @nb_divide@ */ | |
643 | 0, /* @nb_remainder@ */ | |
644 | 0, /* @nb_divmod@ */ | |
645 | 0, /* @nb_power@ */ | |
646 | 0, /* @nb_negative@ */ | |
647 | 0, /* @nb_positive@ */ | |
648 | 0, /* @nb_absolute@ */ | |
649 | ecpt_pynonzerop, /* @nb_nonzero@ */ | |
650 | 0, /* @nb_invert@ */ | |
651 | 0, /* @nb_lshift@ */ | |
652 | 0, /* @nb_rshift@ */ | |
653 | 0, /* @nb_and@ */ | |
654 | 0, /* @nb_xor@ */ | |
655 | 0, /* @nb_or@ */ | |
656 | 0, /* @nb_coerce@ */ | |
657 | ecpt_pyint, /* @nb_int@ */ | |
658 | ecpt_pylong, /* @nb_long@ */ | |
659 | 0, /* @nb_float@ */ | |
660 | 0, /* @nb_oct@ */ | |
661 | 0, /* @nb_hex@ */ | |
662 | ||
663 | 0, /* @nb_inplace_add@ */ | |
664 | 0, /* @nb_inplace_subtract@ */ | |
665 | 0, /* @nb_inplace_multiply@ */ | |
666 | 0, /* @nb_inplace_divide@ */ | |
667 | 0, /* @nb_inplace_remainder@ */ | |
668 | 0, /* @nb_inplace_power@ */ | |
669 | 0, /* @nb_inplace_lshift@ */ | |
670 | 0, /* @nb_inplace_rshift@ */ | |
671 | 0, /* @nb_inplace_and@ */ | |
672 | 0, /* @nb_inplace_xor@ */ | |
673 | 0, /* @nb_inplace_or@ */ | |
674 | ||
675 | 0, /* @nb_floor_divide@ */ | |
676 | 0, /* @nb_true_divide@ */ | |
677 | 0, /* @nb_inplace_floor_divide@ */ | |
678 | 0, /* @nb_inplace_true_divide@ */ | |
679 | }; | |
680 | ||
c263b05c | 681 | static const PyTypeObject ecpt_pytype_skel = { |
591bf41b | 682 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 683 | "ECPt", /* @tp_name@ */ |
d7ab1bab | 684 | sizeof(ecpt_pyobj), /* @tp_basicsize@ */ |
685 | 0, /* @tp_itemsize@ */ | |
686 | ||
687 | ecpt_pydealloc, /* @tp_dealloc@ */ | |
688 | 0, /* @tp_print@ */ | |
689 | 0, /* @tp_getattr@ */ | |
690 | 0, /* @tp_setattr@ */ | |
691 | 0, /* @tp_compare@ */ | |
692 | 0, /* @tp_repr@ */ | |
c90f712e | 693 | PYNUMBER(ecpt), /* @tp_as_number@ */ |
d7ab1bab | 694 | 0, /* @tp_as_sequence@ */ |
695 | 0, /* @tp_as_mapping@ */ | |
696 | ecpt_pyhash, /* @tp_hash@ */ | |
697 | 0, /* @tp_call@ */ | |
698 | 0, /* @tp_str@ */ | |
699 | 0, /* @tp_getattro@ */ | |
700 | 0, /* @tp_setattro@ */ | |
701 | 0, /* @tp_as_buffer@ */ | |
702 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
703 | Py_TPFLAGS_CHECKTYPES | | |
704 | Py_TPFLAGS_BASETYPE, | |
705 | ||
706 | /* @tp_doc@ */ | |
d96c882e MW |
707 | "ECPt([X, [Y]]): elliptic curve points, not associated with any curve.\n" |
708 | " X alone may be None, an existing point, a string 'X, Y', an\n" | |
709 | " x-coordinate, or a pair (X, Y); X and Y should be a coordinate pair.", | |
d7ab1bab | 710 | |
711 | 0, /* @tp_traverse@ */ | |
712 | 0, /* @tp_clear@ */ | |
713 | ecpt_pyrichcompare, /* @tp_richcompare@ */ | |
714 | 0, /* @tp_weaklistoffset@ */ | |
715 | 0, /* @tp_iter@ */ | |
963a6148 | 716 | 0, /* @tp_iternext@ */ |
c90f712e | 717 | PYMETHODS(ecptnc), /* @tp_methods@ */ |
d7ab1bab | 718 | 0, /* @tp_members@ */ |
c90f712e | 719 | PYGETSET(ecptnc), /* @tp_getset@ */ |
d7ab1bab | 720 | 0, /* @tp_base@ */ |
721 | 0, /* @tp_dict@ */ | |
722 | 0, /* @tp_descr_get@ */ | |
723 | 0, /* @tp_descr_set@ */ | |
724 | 0, /* @tp_dictoffset@ */ | |
725 | 0, /* @tp_init@ */ | |
726 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
727 | ecptnc_pynew, /* @tp_new@ */ | |
3aa33042 | 728 | 0, /* @tp_free@ */ |
d7ab1bab | 729 | 0 /* @tp_is_gc@ */ |
730 | }; | |
731 | ||
8e923c68 MW |
732 | static const PyMemberDef ecpt_pymembers[] = { |
733 | #define MEMBERSTRUCT ecpt_pyobj | |
734 | MEMRNM(curve, T_OBJECT, ob_type, READONLY, | |
735 | "P.curve -> elliptic curve containing P") | |
736 | #undef MEMBERSTRUCT | |
737 | { 0 } | |
738 | }; | |
739 | ||
c90f712e | 740 | static const PyGetSetDef ecpt_pygetset[] = { |
d7ab1bab | 741 | #define GETSETNAME(op, name) ep##op##_##name |
d7ab1bab | 742 | GET (point, "P.point -> standalone curve point") |
743 | GET (x, "P.x -> Cartesian x coordinate of P") | |
744 | GET (y, "P.y -> Cartesian y coordinate of P") | |
745 | GET (_x, "P._x -> internal x coordinate of P") | |
746 | GET (_y, "P._y -> internal y coordinate of P") | |
747 | GET (_z, "P._z -> internal z coordinate of P, or None") | |
748 | #undef GETSETNAME | |
749 | { 0 } | |
750 | }; | |
751 | ||
c90f712e | 752 | static const PyMethodDef ecpt_pymethods[] = { |
d7ab1bab | 753 | #define METHNAME(func) epmeth_##func |
91e56f06 | 754 | NAMETH(toraw, "X.toraw() -> BIN") |
e12df5f3 | 755 | KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN") |
91e56f06 MW |
756 | NAMETH(dbl, "X.dbl() -> X + X") |
757 | NAMETH(oncurvep, "X.oncurvep() -> BOOL") | |
a157093f MW |
758 | CMTH (fromraw, "fromraw(STR) -> (P, REST)") |
759 | KWCMTH(os2ecp, "os2ecp(STR, [flags = ...]) -> (P, REST)") | |
d7ab1bab | 760 | #undef METHNAME |
761 | { 0 } | |
762 | }; | |
763 | ||
c90f712e | 764 | static const PyNumberMethods ecptcurve_pynumber = { |
d7ab1bab | 765 | ecpt_pyadd, /* @nb_add@ */ |
766 | ecpt_pysub, /* @nb_subtract@ */ | |
767 | ecpt_pymul, /* @nb_multiply@ */ | |
768 | 0, /* @nb_divide@ */ | |
769 | 0, /* @nb_remainder@ */ | |
770 | 0, /* @nb_divmod@ */ | |
771 | 0, /* @nb_power@ */ | |
772 | ecpt_pyneg, /* @nb_negative@ */ | |
773 | ecpt_pyid, /* @nb_positive@ */ | |
774 | 0, /* @nb_absolute@ */ | |
775 | 0, /* @nb_nonzero@ */ | |
776 | 0, /* @nb_invert@ */ | |
777 | 0, /* @nb_lshift@ */ | |
778 | 0, /* @nb_rshift@ */ | |
779 | 0, /* @nb_and@ */ | |
780 | 0, /* @nb_xor@ */ | |
781 | 0, /* @nb_or@ */ | |
782 | 0, /* @nb_coerce@ */ | |
783 | 0, /* @nb_int@ */ | |
784 | 0, /* @nb_long@ */ | |
785 | 0, /* @nb_float@ */ | |
786 | 0, /* @nb_oct@ */ | |
787 | 0, /* @nb_hex@ */ | |
788 | ||
789 | 0, /* @nb_inplace_add@ */ | |
790 | 0, /* @nb_inplace_subtract@ */ | |
791 | 0, /* @nb_inplace_multiply@ */ | |
792 | 0, /* @nb_inplace_divide@ */ | |
793 | 0, /* @nb_inplace_remainder@ */ | |
794 | 0, /* @nb_inplace_power@ */ | |
795 | 0, /* @nb_inplace_lshift@ */ | |
796 | 0, /* @nb_inplace_rshift@ */ | |
797 | 0, /* @nb_inplace_and@ */ | |
798 | 0, /* @nb_inplace_xor@ */ | |
799 | 0, /* @nb_inplace_or@ */ | |
800 | ||
801 | 0, /* @nb_floor_divide@ */ | |
802 | 0, /* @nb_true_divide@ */ | |
803 | 0, /* @nb_inplace_floor_divide@ */ | |
804 | 0, /* @nb_inplace_true_divide@ */ | |
805 | }; | |
806 | ||
c263b05c | 807 | static const PyTypeObject ecptcurve_pytype_skel = { |
591bf41b | 808 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 809 | "ECPtCurve", /* @tp_name@ */ |
d7ab1bab | 810 | sizeof(ecpt_pyobj), /* @tp_basicsize@ */ |
811 | 0, /* @tp_itemsize@ */ | |
812 | ||
813 | ecpt_pydealloc, /* @tp_dealloc@ */ | |
814 | 0, /* @tp_print@ */ | |
815 | 0, /* @tp_getattr@ */ | |
816 | 0, /* @tp_setattr@ */ | |
817 | 0, /* @tp_compare@ */ | |
818 | 0, /* @tp_repr@ */ | |
c90f712e | 819 | PYNUMBER(ecptcurve), /* @tp_as_number@ */ |
d7ab1bab | 820 | 0, /* @tp_as_sequence@ */ |
821 | 0, /* @tp_as_mapping@ */ | |
822 | 0, /* @tp_hash@ */ | |
823 | 0, /* @tp_call@ */ | |
824 | 0, /* @tp_str@ */ | |
825 | 0, /* @tp_getattro@ */ | |
826 | 0, /* @tp_setattro@ */ | |
827 | 0, /* @tp_as_buffer@ */ | |
828 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
829 | Py_TPFLAGS_CHECKTYPES | | |
830 | Py_TPFLAGS_BASETYPE, | |
831 | ||
832 | /* @tp_doc@ */ | |
d96c882e | 833 | "Elliptic curve points; abstract base class for points on given curves.", |
d7ab1bab | 834 | |
835 | 0, /* @tp_traverse@ */ | |
836 | 0, /* @tp_clear@ */ | |
837 | 0, /* @tp_richcompare@ */ | |
838 | 0, /* @tp_weaklistoffset@ */ | |
839 | 0, /* @tp_iter@ */ | |
963a6148 | 840 | 0, /* @tp_iternext@ */ |
c90f712e | 841 | PYMETHODS(ecpt), /* @tp_methods@ */ |
8e923c68 | 842 | PYMEMBERS(ecpt), /* @tp_members@ */ |
c90f712e | 843 | PYGETSET(ecpt), /* @tp_getset@ */ |
d7ab1bab | 844 | 0, /* @tp_base@ */ |
845 | 0, /* @tp_dict@ */ | |
846 | 0, /* @tp_descr_get@ */ | |
847 | 0, /* @tp_descr_set@ */ | |
848 | 0, /* @tp_dictoffset@ */ | |
849 | 0, /* @tp_init@ */ | |
850 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
851 | abstract_pynew, /* @tp_new@ */ | |
3aa33042 | 852 | 0, /* @tp_free@ */ |
d7ab1bab | 853 | 0 /* @tp_is_gc@ */ |
854 | }; | |
855 | ||
856 | /*----- Elliptic curves themselves ----------------------------------------*/ | |
857 | ||
858 | static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op) | |
859 | { | |
7f8c2476 MW |
860 | int b; |
861 | ||
862 | assert(ECCURVE_PYCHECK(x)); | |
863 | if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL; | |
864 | b = ec_samep(ECCURVE_C(x), ECCURVE_C(y)); | |
d7ab1bab | 865 | switch (op) { |
866 | case Py_EQ: break; | |
2c1ccbae | 867 | case Py_NE: b = !b; break; |
d7ab1bab | 868 | default: TYERR("can't order elliptic curves"); |
869 | } | |
870 | return (getbool(b)); | |
871 | end: | |
872 | return (0); | |
873 | } | |
874 | ||
875 | static PyObject *ecmmul_id(PyObject *me) | |
876 | { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); } | |
877 | ||
878 | static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m) | |
879 | { | |
880 | ec_mulfactor *f = pp; | |
881 | ||
50bff227 | 882 | EC_CREATE(&f->base); |
d7ab1bab | 883 | if (getecpt(ECCURVE_C(me), &f->base, x) || |
884 | (f->exp = getmp(m)) == 0) | |
885 | return (-1); | |
d7ab1bab | 886 | return (0); |
887 | } | |
888 | ||
889 | static PyObject *ecmmul_exp(PyObject *me, void *pp, int n) | |
890 | { | |
891 | ec p = EC_INIT; | |
892 | ec_immul(ECCURVE_C(me), &p, pp, n); | |
893 | return (ecpt_pywrap(me, &p)); | |
894 | } | |
895 | ||
896 | static void ecmmul_drop(void *pp) | |
897 | { | |
898 | ec_mulfactor *f = pp; | |
899 | EC_DESTROY(&f->base); | |
900 | MP_DROP(f->exp); | |
901 | } | |
902 | ||
903 | static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg) | |
904 | { | |
905 | return (mexp_common(me, arg, sizeof(ec_mulfactor), | |
906 | ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop)); | |
907 | } | |
908 | ||
d7ab1bab | 909 | static void eccurve_pydealloc(PyObject *me) |
910 | { | |
911 | ec_destroycurve(ECCURVE_C(me)); | |
912 | Py_DECREF(ECCURVE_FOBJ(me)); | |
913 | PyType_Type.tp_dealloc(me); | |
914 | } | |
915 | ||
916 | static PyObject *ecmeth_find(PyObject *me, PyObject *arg) | |
917 | { | |
918 | PyObject *x; | |
919 | mp *xx = 0; | |
920 | ec p = EC_INIT; | |
921 | PyObject *rc = 0; | |
922 | ||
923 | if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end; | |
924 | if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f) | |
925 | xx = MP_COPY(FE_X(x)); | |
926 | else if ((xx = getmp(x)) == 0) | |
927 | goto end; | |
928 | else | |
929 | xx = F_IN(ECCURVE_C(me)->f, xx, xx); | |
930 | if (EC_FIND(ECCURVE_C(me), &p, xx) == 0) | |
931 | VALERR("not on the curve"); | |
932 | rc = ecpt_pywrap(me, &p); | |
933 | end: | |
934 | if (xx) MP_DROP(xx); | |
935 | return (rc); | |
936 | } | |
937 | ||
938 | static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw) | |
939 | { | |
827f89d7 | 940 | static const char *const kwlist[] = { "rng", 0 }; |
d7ab1bab | 941 | grand *r = &rand_global; |
942 | ec p = EC_INIT; | |
943 | ||
827f89d7 | 944 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", KWLIST, |
d7ab1bab | 945 | convgrand, &r)) |
946 | return (0); | |
947 | ec_rand(ECCURVE_C(me), &p, r); | |
948 | EC_IN(ECCURVE_C(me), &p, &p); | |
949 | return (ecpt_pywrap(me, &p)); | |
950 | } | |
951 | ||
a157093f | 952 | static PyObject *ecmeth_parse(PyObject *me, PyObject *arg) |
f281293c MW |
953 | { |
954 | char *p; | |
955 | qd_parse qd; | |
956 | ec_curve *c; | |
957 | PyObject *rc = 0; | |
958 | ||
a157093f | 959 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
960 | qd.p = p; qd.e = 0; |
961 | if ((c = ec_curveparse(&qd)) == 0) VALERR(qd.e); | |
962 | rc = eccurve_pywrap(0, c); | |
963 | end: | |
964 | return (rc); | |
965 | } | |
966 | ||
d7ab1bab | 967 | static PyObject *eccurve_dopywrap(PyTypeObject *ty, |
968 | PyObject *fobj, ec_curve *c) | |
969 | { | |
df9f8366 | 970 | eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name); |
d7ab1bab | 971 | cobj->c = c; |
972 | cobj->fobj = fobj; | |
24b3d57b MW |
973 | cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj); |
974 | cobj->ty.ht_type.tp_base = ecptcurve_pytype; | |
d7ab1bab | 975 | Py_INCREF(ecptcurve_pytype); |
24b3d57b MW |
976 | cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT | |
977 | Py_TPFLAGS_BASETYPE | | |
978 | Py_TPFLAGS_CHECKTYPES | | |
979 | Py_TPFLAGS_HEAPTYPE); | |
980 | cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc; | |
981 | cobj->ty.ht_type.tp_free = 0; | |
982 | cobj->ty.ht_type.tp_new = ecpt_pynew; | |
dc075750 | 983 | typeready(&cobj->ty.ht_type); |
d7ab1bab | 984 | return ((PyObject *)cobj); |
985 | } | |
986 | ||
987 | PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c) | |
988 | { | |
989 | PyTypeObject *ty; | |
990 | ||
991 | if (!fobj) | |
992 | fobj = field_pywrap(c->f); | |
993 | else | |
994 | Py_INCREF(fobj); | |
995 | assert(FIELD_F(fobj) == c->f); | |
20441612 | 996 | if (STRCMP(EC_NAME(c), ==, "prime")) |
d7ab1bab | 997 | ty = ecprimecurve_pytype; |
20441612 | 998 | else if (STRCMP(EC_NAME(c), ==, "primeproj")) |
d7ab1bab | 999 | ty = ecprimeprojcurve_pytype; |
20441612 | 1000 | else if (STRCMP(EC_NAME(c), ==, "bin")) |
d7ab1bab | 1001 | ty = ecbincurve_pytype; |
20441612 | 1002 | else if (STRCMP(EC_NAME(c), ==, "binproj")) |
d7ab1bab | 1003 | ty = ecbinprojcurve_pytype; |
1004 | else | |
1005 | abort(); | |
1006 | return (eccurve_dopywrap(ty, fobj, c)); | |
1007 | } | |
1008 | ||
1009 | static PyObject *eccurve_pynew(PyTypeObject *ty, | |
1010 | ec_curve *(*make)(field *, mp *, mp *), | |
1011 | PyObject *arg, PyObject *kw) | |
1012 | { | |
1013 | PyObject *fobj; | |
1014 | PyObject *cobj = 0; | |
827f89d7 | 1015 | static const char *const kwlist[] = { "field", "a", "b", 0 }; |
d7ab1bab | 1016 | mp *aa = 0, *bb = 0; |
1017 | ||
827f89d7 | 1018 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", KWLIST, |
d7ab1bab | 1019 | field_pytype, &fobj, |
1020 | convmp, &aa, convmp, &bb)) | |
1021 | goto end; | |
1022 | Py_INCREF(fobj); | |
1023 | cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb)); | |
1024 | end: | |
1025 | if (aa) MP_DROP(aa); | |
1026 | if (bb) MP_DROP(bb); | |
1027 | return (cobj); | |
1028 | } | |
1029 | ||
d7ab1bab | 1030 | static PyObject *ecget_name(PyObject *me, void *hunoz) |
2135a6d3 | 1031 | { return (TEXT_FROMSTR(EC_NAME(ECCURVE_C(me)))); } |
d7ab1bab | 1032 | |
1033 | static PyObject *ecget_a(PyObject *me, void *hunoz) | |
1034 | { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); } | |
1035 | ||
b2687a0a | 1036 | static PyObject *ecget_b(PyObject *me, void *hunoz) |
d7ab1bab | 1037 | { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); } |
1038 | ||
1039 | static PyObject *ecget_field(PyObject *me, void *hunoz) | |
1040 | { RETURN_OBJ(ECCURVE_FOBJ(me)); } | |
1041 | ||
1042 | static PyObject *ecget_inf(PyObject *me, void *hunoz) | |
1043 | { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); } | |
1044 | ||
c90f712e | 1045 | static const PyGetSetDef eccurve_pygetset[] = { |
d7ab1bab | 1046 | #define GETSETNAME(op, name) ec##op##_##name |
1047 | GET (name, "E.name -> name of this kind of curve") | |
1048 | GET (a, "E.a -> first parameter of curve") | |
1049 | GET (b, "E.b -> second parameter of curve") | |
1050 | GET (field, "E.field -> finite field containing this curve") | |
1051 | GET (inf, "E.inf -> point at infinity of this curve") | |
1052 | #undef GETSETNAME | |
1053 | { 0 } | |
b2687a0a | 1054 | }; |
d7ab1bab | 1055 | |
c90f712e | 1056 | static const PyMethodDef eccurve_pymethods[] = { |
d7ab1bab | 1057 | #define METHNAME(name) ecmeth_##name |
d96c882e | 1058 | METH (mmul, "E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...") |
d7ab1bab | 1059 | METH (find, "E.find(X) -> P") |
1df8d5fe | 1060 | KWMETH(rand, "E.rand([rng = rand]) -> P") |
a157093f | 1061 | SMTH (parse, "parse(STR) -> (E, REST)") |
d7ab1bab | 1062 | #undef METHNAME |
1063 | { 0 } | |
1064 | }; | |
1065 | ||
c263b05c | 1066 | static const PyTypeObject eccurve_pytype_skel = { |
591bf41b | 1067 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1068 | "ECCurve", /* @tp_name@ */ |
d7ab1bab | 1069 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1070 | 0, /* @tp_itemsize@ */ | |
1071 | ||
1072 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1073 | 0, /* @tp_print@ */ | |
1074 | 0, /* @tp_getattr@ */ | |
1075 | 0, /* @tp_setattr@ */ | |
1076 | 0, /* @tp_compare@ */ | |
1077 | 0, /* @tp_repr@ */ | |
1078 | 0, /* @tp_as_number@ */ | |
1079 | 0, /* @tp_as_sequence@ */ | |
1080 | 0, /* @tp_as_mapping@ */ | |
1081 | 0, /* @tp_hash@ */ | |
1082 | 0, /* @tp_call@ */ | |
1083 | 0, /* @tp_str@ */ | |
1084 | 0, /* @tp_getattro@ */ | |
1085 | 0, /* @tp_setattro@ */ | |
1086 | 0, /* @tp_as_buffer@ */ | |
1087 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1088 | Py_TPFLAGS_BASETYPE, | |
1089 | ||
1090 | /* @tp_doc@ */ | |
d96c882e | 1091 | "An elliptic curve. Abstract class.", |
d7ab1bab | 1092 | |
1093 | 0, /* @tp_traverse@ */ | |
1094 | 0, /* @tp_clear@ */ | |
1095 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1096 | 0, /* @tp_weaklistoffset@ */ | |
1097 | 0, /* @tp_iter@ */ | |
963a6148 | 1098 | 0, /* @tp_iternext@ */ |
c90f712e | 1099 | PYMETHODS(eccurve), /* @tp_methods@ */ |
d7ab1bab | 1100 | 0, /* @tp_members@ */ |
c90f712e | 1101 | PYGETSET(eccurve), /* @tp_getset@ */ |
d7ab1bab | 1102 | 0, /* @tp_base@ */ |
1103 | 0, /* @tp_dict@ */ | |
1104 | 0, /* @tp_descr_get@ */ | |
1105 | 0, /* @tp_descr_set@ */ | |
1106 | 0, /* @tp_dictoffset@ */ | |
1107 | 0, /* @tp_init@ */ | |
1108 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1109 | abstract_pynew, /* @tp_new@ */ | |
3aa33042 | 1110 | 0, /* @tp_free@ */ |
d7ab1bab | 1111 | 0 /* @tp_is_gc@ */ |
1112 | }; | |
1113 | ||
1114 | static PyObject *ecprimecurve_pynew(PyTypeObject *ty, | |
1115 | PyObject *arg, PyObject *kw) | |
1116 | { | |
1117 | return (eccurve_pynew(ty, ec_prime, arg, kw)); | |
1118 | } | |
1119 | ||
c263b05c | 1120 | static const PyTypeObject ecprimecurve_pytype_skel = { |
591bf41b | 1121 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1122 | "ECPrimeCurve", /* @tp_name@ */ |
d7ab1bab | 1123 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1124 | 0, /* @tp_itemsize@ */ | |
1125 | ||
1126 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1127 | 0, /* @tp_print@ */ | |
1128 | 0, /* @tp_getattr@ */ | |
1129 | 0, /* @tp_setattr@ */ | |
1130 | 0, /* @tp_compare@ */ | |
1131 | 0, /* @tp_repr@ */ | |
1132 | 0, /* @tp_as_number@ */ | |
1133 | 0, /* @tp_as_sequence@ */ | |
1134 | 0, /* @tp_as_mapping@ */ | |
1135 | 0, /* @tp_hash@ */ | |
1136 | 0, /* @tp_call@ */ | |
1137 | 0, /* @tp_str@ */ | |
1138 | 0, /* @tp_getattro@ */ | |
1139 | 0, /* @tp_setattro@ */ | |
1140 | 0, /* @tp_as_buffer@ */ | |
1141 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1142 | Py_TPFLAGS_BASETYPE, | |
1143 | ||
1144 | /* @tp_doc@ */ | |
d96c882e MW |
1145 | "ECPrimeCurve(FIELD, A, B): an elliptic curve over a prime field.\n" |
1146 | " Use ECPrimeProjCurve instead.", | |
d7ab1bab | 1147 | |
1148 | 0, /* @tp_traverse@ */ | |
1149 | 0, /* @tp_clear@ */ | |
1150 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1151 | 0, /* @tp_weaklistoffset@ */ | |
1152 | 0, /* @tp_iter@ */ | |
963a6148 | 1153 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1154 | 0, /* @tp_methods@ */ |
1155 | 0, /* @tp_members@ */ | |
1156 | 0, /* @tp_getset@ */ | |
1157 | 0, /* @tp_base@ */ | |
1158 | 0, /* @tp_dict@ */ | |
1159 | 0, /* @tp_descr_get@ */ | |
1160 | 0, /* @tp_descr_set@ */ | |
1161 | 0, /* @tp_dictoffset@ */ | |
1162 | 0, /* @tp_init@ */ | |
1163 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1164 | ecprimecurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1165 | 0, /* @tp_free@ */ |
d7ab1bab | 1166 | 0 /* @tp_is_gc@ */ |
1167 | }; | |
1168 | ||
1169 | static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty, | |
1170 | PyObject *arg, PyObject *kw) | |
1171 | { | |
1172 | return (eccurve_pynew(ty, ec_primeproj, arg, kw)); | |
1173 | } | |
1174 | ||
c263b05c | 1175 | static const PyTypeObject ecprimeprojcurve_pytype_skel = { |
591bf41b | 1176 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1177 | "ECPrimeProjCurve", /* @tp_name@ */ |
d7ab1bab | 1178 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1179 | 0, /* @tp_itemsize@ */ | |
1180 | ||
1181 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1182 | 0, /* @tp_print@ */ | |
1183 | 0, /* @tp_getattr@ */ | |
1184 | 0, /* @tp_setattr@ */ | |
1185 | 0, /* @tp_compare@ */ | |
1186 | 0, /* @tp_repr@ */ | |
1187 | 0, /* @tp_as_number@ */ | |
1188 | 0, /* @tp_as_sequence@ */ | |
1189 | 0, /* @tp_as_mapping@ */ | |
1190 | 0, /* @tp_hash@ */ | |
1191 | 0, /* @tp_call@ */ | |
1192 | 0, /* @tp_str@ */ | |
1193 | 0, /* @tp_getattro@ */ | |
1194 | 0, /* @tp_setattro@ */ | |
1195 | 0, /* @tp_as_buffer@ */ | |
1196 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1197 | Py_TPFLAGS_BASETYPE, | |
1198 | ||
1199 | /* @tp_doc@ */ | |
d96c882e MW |
1200 | "ECPrimeProjCurve(FIELD, A, B): an elliptic curve over a prime field\n" |
1201 | " using projective coordinates.", | |
d7ab1bab | 1202 | |
1203 | 0, /* @tp_traverse@ */ | |
1204 | 0, /* @tp_clear@ */ | |
1205 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1206 | 0, /* @tp_weaklistoffset@ */ | |
1207 | 0, /* @tp_iter@ */ | |
963a6148 | 1208 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1209 | 0, /* @tp_methods@ */ |
1210 | 0, /* @tp_members@ */ | |
1211 | 0, /* @tp_getset@ */ | |
1212 | 0, /* @tp_base@ */ | |
1213 | 0, /* @tp_dict@ */ | |
1214 | 0, /* @tp_descr_get@ */ | |
1215 | 0, /* @tp_descr_set@ */ | |
1216 | 0, /* @tp_dictoffset@ */ | |
1217 | 0, /* @tp_init@ */ | |
1218 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1219 | ecprimeprojcurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1220 | 0, /* @tp_free@ */ |
d7ab1bab | 1221 | 0 /* @tp_is_gc@ */ |
1222 | }; | |
1223 | ||
1224 | static PyObject *ecbincurve_pynew(PyTypeObject *ty, | |
1225 | PyObject *arg, PyObject *kw) | |
1226 | { | |
1227 | return (eccurve_pynew(ty, ec_bin, arg, kw)); | |
1228 | } | |
1229 | ||
c263b05c | 1230 | static const PyTypeObject ecbincurve_pytype_skel = { |
591bf41b | 1231 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1232 | "ECBinCurve", /* @tp_name@ */ |
d7ab1bab | 1233 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1234 | 0, /* @tp_itemsize@ */ | |
1235 | ||
1236 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1237 | 0, /* @tp_print@ */ | |
1238 | 0, /* @tp_getattr@ */ | |
1239 | 0, /* @tp_setattr@ */ | |
1240 | 0, /* @tp_compare@ */ | |
1241 | 0, /* @tp_repr@ */ | |
1242 | 0, /* @tp_as_number@ */ | |
1243 | 0, /* @tp_as_sequence@ */ | |
1244 | 0, /* @tp_as_mapping@ */ | |
1245 | 0, /* @tp_hash@ */ | |
1246 | 0, /* @tp_call@ */ | |
1247 | 0, /* @tp_str@ */ | |
1248 | 0, /* @tp_getattro@ */ | |
1249 | 0, /* @tp_setattro@ */ | |
1250 | 0, /* @tp_as_buffer@ */ | |
1251 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1252 | Py_TPFLAGS_BASETYPE, | |
1253 | ||
1254 | /* @tp_doc@ */ | |
d96c882e MW |
1255 | "ECBinCurve(FIELD, A, B): an elliptic curve over a binary field.\n" |
1256 | " Use ECBinProjCurve instead.", | |
d7ab1bab | 1257 | |
1258 | 0, /* @tp_traverse@ */ | |
1259 | 0, /* @tp_clear@ */ | |
1260 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1261 | 0, /* @tp_weaklistoffset@ */ | |
1262 | 0, /* @tp_iter@ */ | |
963a6148 | 1263 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1264 | 0, /* @tp_methods@ */ |
1265 | 0, /* @tp_members@ */ | |
1266 | 0, /* @tp_getset@ */ | |
1267 | 0, /* @tp_base@ */ | |
1268 | 0, /* @tp_dict@ */ | |
1269 | 0, /* @tp_descr_get@ */ | |
1270 | 0, /* @tp_descr_set@ */ | |
1271 | 0, /* @tp_dictoffset@ */ | |
1272 | 0, /* @tp_init@ */ | |
1273 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1274 | ecbincurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1275 | 0, /* @tp_free@ */ |
d7ab1bab | 1276 | 0 /* @tp_is_gc@ */ |
1277 | }; | |
1278 | ||
1279 | static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty, | |
1280 | PyObject *arg, PyObject *kw) | |
1281 | { | |
1282 | return (eccurve_pynew(ty, ec_binproj, arg, kw)); | |
1283 | } | |
1284 | ||
c263b05c | 1285 | static const PyTypeObject ecbinprojcurve_pytype_skel = { |
591bf41b | 1286 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1287 | "ECBinProjCurve", /* @tp_name@ */ |
d7ab1bab | 1288 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1289 | 0, /* @tp_itemsize@ */ | |
1290 | ||
1291 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1292 | 0, /* @tp_print@ */ | |
1293 | 0, /* @tp_getattr@ */ | |
1294 | 0, /* @tp_setattr@ */ | |
1295 | 0, /* @tp_compare@ */ | |
1296 | 0, /* @tp_repr@ */ | |
1297 | 0, /* @tp_as_number@ */ | |
1298 | 0, /* @tp_as_sequence@ */ | |
1299 | 0, /* @tp_as_mapping@ */ | |
1300 | 0, /* @tp_hash@ */ | |
1301 | 0, /* @tp_call@ */ | |
1302 | 0, /* @tp_str@ */ | |
1303 | 0, /* @tp_getattro@ */ | |
1304 | 0, /* @tp_setattro@ */ | |
1305 | 0, /* @tp_as_buffer@ */ | |
1306 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1307 | Py_TPFLAGS_BASETYPE, | |
1308 | ||
1309 | /* @tp_doc@ */ | |
d96c882e MW |
1310 | "ECBinProjCurve(FIELD, A, B): an elliptic curve over a binary field,\n" |
1311 | " using projective coordinates.", | |
d7ab1bab | 1312 | |
1313 | 0, /* @tp_traverse@ */ | |
1314 | 0, /* @tp_clear@ */ | |
1315 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1316 | 0, /* @tp_weaklistoffset@ */ | |
1317 | 0, /* @tp_iter@ */ | |
963a6148 | 1318 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1319 | 0, /* @tp_methods@ */ |
1320 | 0, /* @tp_members@ */ | |
1321 | 0, /* @tp_getset@ */ | |
1322 | 0, /* @tp_base@ */ | |
1323 | 0, /* @tp_dict@ */ | |
1324 | 0, /* @tp_descr_get@ */ | |
1325 | 0, /* @tp_descr_set@ */ | |
1326 | 0, /* @tp_dictoffset@ */ | |
1327 | 0, /* @tp_init@ */ | |
1328 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1329 | ecbinprojcurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1330 | 0, /* @tp_free@ */ |
d7ab1bab | 1331 | 0 /* @tp_is_gc@ */ |
1332 | }; | |
1333 | ||
1334 | /*----- Curve info --------------------------------------------------------*/ | |
1335 | ||
d7ab1bab | 1336 | void ecinfo_copy(ec_info *eic, const ec_info *ei) |
1337 | { | |
1338 | eic->c = eccurve_copy(ei->c); | |
1339 | EC_CREATE(&eic->g); | |
1340 | EC_COPY(&eic->g, &ei->g); | |
1341 | eic->r = MP_COPY(ei->r); | |
1342 | eic->h = MP_COPY(ei->h); | |
1343 | } | |
1344 | ||
1345 | PyObject *ecinfo_pywrap(ec_info *ei) | |
1346 | { | |
1347 | ecinfo_pyobj *o; | |
1348 | ||
1349 | o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype); | |
1350 | o->ei = *ei; | |
1351 | o->cobj = eccurve_pywrap(0, o->ei.c); | |
1352 | Py_INCREF(o->cobj); | |
1353 | return ((PyObject *)o); | |
1354 | } | |
1355 | ||
1356 | static void ecinfo_pydealloc(PyObject *me) | |
1357 | { | |
1358 | ec_info *ei = ECINFO_EI(me); | |
1359 | EC_DESTROY(&ei->g); | |
1360 | MP_DROP(ei->r); | |
1361 | MP_DROP(ei->h); | |
1362 | Py_DECREF(ECINFO_COBJ(me)); | |
3aa33042 | 1363 | FREEOBJ(me); |
d7ab1bab | 1364 | } |
1365 | ||
1366 | static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) | |
1367 | { | |
1368 | ec_info ei = { 0 }; | |
1369 | PyObject *e, *g; | |
827f89d7 | 1370 | static const char *const kwlist[] = { "curve", "G", "r", "h", 0 }; |
d7ab1bab | 1371 | ecinfo_pyobj *rc = 0; |
1372 | ||
827f89d7 | 1373 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", KWLIST, |
d7ab1bab | 1374 | eccurve_pytype, &e, ecpt_pytype, &g, |
1375 | convmp, &ei.r, convmp, &ei.h)) | |
1376 | goto end; | |
1377 | if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e))) | |
1378 | TYERR("point not from this curve"); | |
1379 | ei.c = ECCURVE_C(e); | |
1380 | EC_CREATE(&ei.g); | |
30720615 | 1381 | EC_OUT(ei.c, &ei.g, ECPT_P(g)); |
d7ab1bab | 1382 | rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0); |
1383 | rc->ei = ei; | |
1384 | rc->cobj = e; | |
1385 | Py_INCREF(rc->cobj); | |
1386 | return ((PyObject *)rc); | |
1387 | ||
1388 | end: | |
1389 | mp_drop(ei.r); | |
1390 | mp_drop(ei.h); | |
1391 | return (0); | |
1392 | } | |
1393 | ||
a157093f | 1394 | static PyObject *eimeth_parse(PyObject *me, PyObject *arg) |
d7ab1bab | 1395 | { |
1396 | char *p; | |
1397 | qd_parse qd; | |
1398 | ec_info ei; | |
1399 | PyObject *rc = 0; | |
1400 | ||
a157093f | 1401 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
1402 | qd.p = p; qd.e = 0; |
1403 | if (ec_infoparse(&qd, &ei)) VALERR(qd.e); | |
d7ab1bab | 1404 | rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p); |
1405 | end: | |
1406 | return (rc); | |
1407 | } | |
1408 | ||
d7ab1bab | 1409 | static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op) |
1410 | { | |
1411 | int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y)); | |
1412 | switch (op) { | |
1413 | case Py_EQ: break; | |
1414 | case Py_NE: b = !b; | |
1415 | default: TYERR("can't order elliptic curve infos"); | |
1416 | } | |
1417 | return (getbool(b)); | |
1418 | end: | |
1419 | return (0); | |
1420 | } | |
1421 | ||
1422 | static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw) | |
1423 | { | |
827f89d7 | 1424 | static const char *const kwlist[] = { "rng", 0 }; |
d7ab1bab | 1425 | grand *r = &rand_global; |
1426 | const char *p; | |
1427 | ||
827f89d7 | 1428 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", KWLIST, |
d7ab1bab | 1429 | convgrand, &r)) |
1430 | goto end; | |
1431 | if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0) | |
1432 | VALERR(p); | |
1433 | RETURN_ME; | |
1434 | end: | |
1435 | return (0); | |
1436 | } | |
1437 | ||
1438 | static PyObject *eiget_curve(PyObject *me, void *hunoz) | |
1439 | { RETURN_OBJ(ECINFO_COBJ(me)); } | |
1440 | ||
1441 | static PyObject *eiget_G(PyObject *me, void *hunoz) | |
1442 | { | |
1443 | ec_info *ei = ECINFO_EI(me); | |
1444 | ec p = EC_INIT; | |
1445 | EC_IN(ei->c, &p, &ei->g); | |
1446 | return (ecpt_pywrap(ECINFO_COBJ(me), &p)); | |
1447 | } | |
1448 | ||
1449 | static PyObject *eiget_r(PyObject *me, void *hunoz) | |
1450 | { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); } | |
1451 | ||
1452 | static PyObject *eiget_h(PyObject *me, void *hunoz) | |
1453 | { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); } | |
1454 | ||
c90f712e | 1455 | static const PyGetSetDef ecinfo_pygetset[] = { |
d7ab1bab | 1456 | #define GETSETNAME(op, name) ei##op##_##name |
1457 | GET (curve, "I.curve -> the elliptic curve") | |
1458 | GET (G, "I.G -> generator point for the group") | |
1459 | GET (r, "I.r -> order of the group (and hence of G") | |
1460 | GET (h, "I.h -> cofactor of the group") | |
1461 | #undef GETSETNAME | |
1462 | { 0 } | |
1463 | }; | |
1464 | ||
c90f712e | 1465 | static const PyMethodDef ecinfo_pymethods[] = { |
d7ab1bab | 1466 | #define METHNAME(name) eimeth_##name |
2465e84b | 1467 | KWMETH(check, "I.check([rng = rand]) -> None") |
a157093f | 1468 | SMTH (parse, "parse(STR) -> (I, REST)") |
d7ab1bab | 1469 | #undef METHNAME |
1470 | { 0 } | |
1471 | }; | |
1472 | ||
c263b05c | 1473 | static const PyTypeObject ecinfo_pytype_skel = { |
591bf41b | 1474 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
c461c9b3 | 1475 | "ECInfo", /* @tp_name@ */ |
d7ab1bab | 1476 | sizeof(ecinfo_pyobj), /* @tp_basicsize@ */ |
1477 | 0, /* @tp_itemsize@ */ | |
1478 | ||
1479 | ecinfo_pydealloc, /* @tp_dealloc@ */ | |
1480 | 0, /* @tp_print@ */ | |
1481 | 0, /* @tp_getattr@ */ | |
1482 | 0, /* @tp_setattr@ */ | |
1483 | 0, /* @tp_compare@ */ | |
1484 | 0, /* @tp_repr@ */ | |
1485 | 0, /* @tp_as_number@ */ | |
1486 | 0, /* @tp_as_sequence@ */ | |
1487 | 0, /* @tp_as_mapping@ */ | |
1488 | 0, /* @tp_hash@ */ | |
1489 | 0, /* @tp_call@ */ | |
1490 | 0, /* @tp_str@ */ | |
1491 | 0, /* @tp_getattro@ */ | |
1492 | 0, /* @tp_setattro@ */ | |
1493 | 0, /* @tp_as_buffer@ */ | |
1494 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1495 | Py_TPFLAGS_BASETYPE, | |
1496 | ||
1497 | /* @tp_doc@ */ | |
d96c882e | 1498 | "ECInfo(CURVE, G, R, H): elliptic curve domain parameters.", |
d7ab1bab | 1499 | |
1500 | 0, /* @tp_traverse@ */ | |
1501 | 0, /* @tp_clear@ */ | |
1502 | ecinfo_pyrichcompare, /* @tp_richcompare@ */ | |
1503 | 0, /* @tp_weaklistoffset@ */ | |
1504 | 0, /* @tp_iter@ */ | |
963a6148 | 1505 | 0, /* @tp_iternext@ */ |
c90f712e | 1506 | PYMETHODS(ecinfo), /* @tp_methods@ */ |
d7ab1bab | 1507 | 0, /* @tp_members@ */ |
c90f712e | 1508 | PYGETSET(ecinfo), /* @tp_getset@ */ |
d7ab1bab | 1509 | 0, /* @tp_base@ */ |
1510 | 0, /* @tp_dict@ */ | |
1511 | 0, /* @tp_descr_get@ */ | |
1512 | 0, /* @tp_descr_set@ */ | |
1513 | 0, /* @tp_dictoffset@ */ | |
1514 | 0, /* @tp_init@ */ | |
1515 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1516 | ecinfo_pynew, /* @tp_new@ */ | |
3aa33042 | 1517 | 0, /* @tp_free@ */ |
d7ab1bab | 1518 | 0 /* @tp_is_gc@ */ |
1519 | }; | |
1520 | ||
1521 | /*----- Setup -------------------------------------------------------------*/ | |
1522 | ||
810542b0 MW |
1523 | static const struct nameval consts[] = { |
1524 | CONST(EC_XONLY), CONST(EC_YBIT), CONST(EC_LSB), | |
1525 | CONST(EC_CMPR), CONST(EC_EXPLY), CONST(EC_SORT), | |
1526 | { 0 } | |
1527 | }; | |
1528 | ||
d7ab1bab | 1529 | void ec_pyinit(void) |
1530 | { | |
1531 | INITTYPE(ecpt, root); | |
1532 | INITTYPE(ecptcurve, ecpt); | |
1533 | INITTYPE(eccurve, type); | |
1534 | INITTYPE(ecprimecurve, eccurve); | |
1535 | INITTYPE(ecprimeprojcurve, ecprimecurve); | |
1536 | INITTYPE(ecbincurve, eccurve); | |
1537 | INITTYPE(ecbinprojcurve, ecbincurve); | |
1538 | INITTYPE(ecinfo, root); | |
d7ab1bab | 1539 | } |
1540 | ||
a539ffb8 MW |
1541 | static const char *ec_namefn(const void *p) |
1542 | { const ecentry *ec = p; return (ec->name); } | |
1543 | ||
1544 | static int ec_ixfn(const void *p) | |
d7ab1bab | 1545 | { |
a539ffb8 MW |
1546 | const ecentry *ec = p; |
1547 | int i; | |
1548 | ||
1549 | for (i = 0; ectab[i].name; i++) | |
1550 | if (ectab[i].data == ec->data) return (i); | |
1551 | return (-1); | |
1552 | } | |
1553 | ||
1554 | static PyObject *ec_valfn(int i) | |
1555 | { | |
1556 | ec_info ei; | |
1557 | ||
1558 | ec_infofromdata(&ei, ectab[i].data); | |
1559 | return (ecinfo_pywrap(&ei)); | |
d7ab1bab | 1560 | } |
1561 | ||
1562 | void ec_pyinsert(PyObject *mod) | |
1563 | { | |
1564 | INSERT("ECPt", ecpt_pytype); | |
1565 | INSERT("ECPtCurve", ecptcurve_pytype); | |
1566 | INSERT("ECCurve", eccurve_pytype); | |
1567 | INSERT("ECPrimeCurve", ecprimecurve_pytype); | |
1568 | INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype); | |
1569 | INSERT("ECBinCurve", ecbincurve_pytype); | |
1570 | INSERT("ECBinProjCurve", ecbinprojcurve_pytype); | |
1571 | INSERT("ECInfo", ecinfo_pytype); | |
a539ffb8 MW |
1572 | INSERT("eccurves", make_grouptab(ectab, sizeof(*ectab), |
1573 | ec_namefn, ec_ixfn, ec_valfn)); | |
810542b0 | 1574 | setconstants(mod, consts); |
d7ab1bab | 1575 | } |
1576 | ||
1577 | /*----- That's all, folks -------------------------------------------------*/ |