Commit | Line | Data |
---|---|---|
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 | ||
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", | |
109 | p->ob_type->tp_name); | |
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 | ||
195 | static 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 | ||
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); |
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 | 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); | |
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 |
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); | |
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)); | |
307 | end: | |
308 | return (rc); | |
309 | } | |
310 | ||
d7ab1bab | 311 | static PyObject *epget_curve(PyObject *me, void *hunoz) |
312 | { RETURN_OBJ(ECPT_COBJ(me)); } | |
313 | ||
a157093f | 314 | static PyObject *epmeth_frombuf(PyObject *me, PyObject *arg) |
f281293c MW |
315 | { |
316 | buf b; | |
317 | char *p; | |
318 | Py_ssize_t sz; | |
319 | PyObject *rc = 0; | |
320 | ec pp = EC_INIT; | |
321 | ||
a157093f | 322 | if (!PyArg_ParseTuple(arg, "s#:frombuf", &p, &sz)) goto end; |
f281293c MW |
323 | buf_init(&b, p, sz); |
324 | if (buf_getec(&b, &pp)) VALERR("malformed data"); | |
325 | rc = Py_BuildValue("(NN)", ecpt_pywrapout(me, &pp), | |
326 | bytestring_pywrapbuf(&b)); | |
327 | end: | |
328 | return (rc); | |
329 | } | |
330 | ||
a157093f | 331 | static PyObject *epmeth_parse(PyObject *me, PyObject *arg) |
f281293c MW |
332 | { |
333 | char *p; | |
334 | qd_parse qd; | |
335 | PyObject *rc = 0; | |
336 | ec pp = EC_INIT; | |
337 | ||
a157093f | 338 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
339 | qd.p = p; qd.e = 0; |
340 | if (!ec_ptparse(&qd, &pp)) VALERR(qd.e); | |
341 | rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p); | |
342 | end: | |
343 | return (rc); | |
344 | } | |
345 | ||
a157093f | 346 | static PyObject *epmeth_fromraw(PyObject *me, PyObject *arg) |
f281293c MW |
347 | { |
348 | char *p; | |
349 | Py_ssize_t len; | |
350 | buf b; | |
351 | PyObject *rc = 0; | |
352 | ec_curve *cc; | |
353 | ec pp = EC_INIT; | |
354 | ||
a157093f | 355 | if (!PyArg_ParseTuple(arg, "s#:fromraw", &me, &p, &len)) return (0); |
f281293c MW |
356 | buf_init(&b, p, len); |
357 | cc = ECCURVE_C(me); | |
358 | if (ec_getraw(cc, &b, &pp)) | |
359 | VALERR("bad point"); | |
360 | EC_IN(cc, &pp, &pp); | |
361 | rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b)); | |
362 | end: | |
363 | return (rc); | |
364 | } | |
365 | ||
a157093f | 366 | static PyObject *epmeth_os2ecp(PyObject *me, PyObject *arg, PyObject *kw) |
f281293c MW |
367 | { |
368 | char *p; | |
369 | Py_ssize_t len; | |
370 | buf b; | |
371 | PyObject *rc = 0; | |
372 | ec_curve *cc; | |
373 | unsigned f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY; | |
374 | ec pp = EC_INIT; | |
a157093f | 375 | static const char *const kwlist[] = { "buf", "flags", 0 }; |
f281293c | 376 | |
a157093f MW |
377 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:os2ecp", KWLIST, |
378 | &p, &len, convuint, &f)) | |
f281293c MW |
379 | return (0); |
380 | buf_init(&b, p, len); | |
381 | cc = ECCURVE_C(me); | |
382 | if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point"); | |
383 | EC_IN(cc, &pp, &pp); | |
384 | rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b)); | |
385 | end: | |
386 | return (rc); | |
387 | } | |
388 | ||
d7ab1bab | 389 | static PyObject *epncget_ix(PyObject *me, void *hunoz) |
390 | { | |
391 | ec p = EC_INIT; | |
392 | PyObject *rc; | |
393 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
394 | getecptout(&p, me); | |
395 | rc = mp_pywrap(MP_COPY(p.x)); | |
396 | EC_DESTROY(&p); | |
397 | return (rc); | |
398 | } | |
399 | ||
400 | static PyObject *epncget_iy(PyObject *me, void *hunoz) | |
401 | { | |
402 | ec p = EC_INIT; | |
403 | PyObject *rc; | |
404 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
405 | getecptout(&p, me); | |
406 | rc = mp_pywrap(MP_COPY(p.y)); | |
407 | EC_DESTROY(&p); | |
408 | return (rc); | |
409 | } | |
410 | ||
411 | static PyObject *epncget_point(PyObject *me, void *hunoz) | |
412 | { RETURN_ME; } | |
413 | ||
414 | static PyObject *epget_point(PyObject *me, void *hunoz) | |
415 | { | |
416 | ec p = EC_INIT; | |
417 | getecptout(&p, me); | |
418 | return (ecpt_pywrapout(ecpt_pytype, &p)); | |
419 | } | |
420 | ||
421 | static PyObject *epget_x(PyObject *me, void *hunoz) | |
422 | { | |
423 | ec_curve *c = ECPT_C(me); | |
424 | ec *pp = ECPT_P(me); | |
425 | PyObject *fobj = ECPT_FOBJ(me); | |
426 | ec p = EC_INIT; | |
427 | PyObject *rc; | |
428 | ||
429 | if (EC_ATINF(pp)) RETURN_NONE; | |
430 | EC_OUT(c, &p, pp); | |
431 | rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.x)); | |
432 | EC_DESTROY(&p); | |
433 | return (rc); | |
434 | } | |
435 | ||
436 | static PyObject *epget_y(PyObject *me, void *hunoz) | |
437 | { | |
438 | ec_curve *c = ECPT_C(me); | |
439 | ec *pp = ECPT_P(me); | |
440 | PyObject *fobj = ECPT_FOBJ(me); | |
441 | ec p = EC_INIT; | |
442 | PyObject *rc; | |
443 | ||
444 | if (EC_ATINF(pp)) RETURN_NONE; | |
445 | EC_OUT(c, &p, pp); | |
446 | rc = fe_pywrap(fobj, F_IN(c->f, MP_NEW, p.y)); | |
447 | EC_DESTROY(&p); | |
448 | return (rc); | |
449 | } | |
450 | ||
451 | static PyObject *epget__x(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)->x))); | |
455 | } | |
456 | ||
457 | static PyObject *epget__y(PyObject *me, void *hunoz) | |
458 | { | |
459 | if (EC_ATINF(ECPT_P(me))) RETURN_NONE; | |
460 | return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->y))); | |
461 | } | |
462 | ||
463 | static PyObject *epget__z(PyObject *me, void *hunoz) | |
464 | { | |
465 | if (EC_ATINF(ECPT_P(me)) || !ECPT_P(me)->z) RETURN_NONE; | |
466 | return (fe_pywrap(ECPT_FOBJ(me), MP_COPY(ECPT_P(me)->z))); | |
467 | } | |
468 | ||
469 | static mp *coord_in(field *f, PyObject *x) | |
470 | { | |
471 | mp *xx; | |
472 | if (FE_PYCHECK(x) && FE_F(x) == f) | |
473 | return (MP_COPY(FE_X(x))); | |
474 | else if ((xx = getmp(x)) == 0) | |
475 | return (0); | |
476 | else | |
477 | return (F_IN(f, xx, xx)); | |
478 | } | |
479 | ||
480 | static int ecptxl_3(ec_curve *c, ec *p, | |
481 | PyObject *x, PyObject *y, PyObject *z) | |
482 | { | |
483 | int rc = -1; | |
484 | ||
485 | if (!x || !y || !z) TYERR("missing argument"); | |
486 | if (!c) VALERR("internal form with no curve!"); | |
2ee1ed30 MW |
487 | if ((p->x = coord_in(c->f, x)) == 0 || |
488 | (p->y = coord_in(c->f, y)) == 0 || | |
489 | (z != Py_None && (p->z = coord_in(c->f, z)) == 0)) | |
d7ab1bab | 490 | goto end; |
491 | if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */ | |
492 | rc = 0; | |
493 | end: | |
494 | return (rc); | |
495 | } | |
496 | ||
497 | static int ecptxl_2(ec_curve *c, ec *p, PyObject *x, PyObject *y) | |
498 | { | |
499 | int rc = -1; | |
500 | ||
501 | if (!x || !y) TYERR("missing argument"); | |
502 | if ((p->x = getmp(x)) == 0 || | |
503 | (p->y = getmp(y)) == 0) | |
504 | goto end; | |
505 | if (c) EC_IN(c, p, p); | |
506 | rc = 0; | |
507 | end: | |
508 | return (rc); | |
509 | } | |
510 | ||
511 | static int ecptxl_1(ec_curve *c, ec *p, PyObject *x) | |
512 | { | |
513 | int rc = -1; | |
514 | PyObject *y = 0, *z = 0, *t = 0; | |
515 | mp *xx = 0; | |
516 | const void *q; | |
8ebf420c | 517 | Py_ssize_t n; |
d7ab1bab | 518 | qd_parse qd; |
519 | ||
520 | Py_XINCREF(x); | |
521 | if (!x || x == Py_None) | |
522 | /*cool*/; | |
523 | else if (ECPT_PYCHECK(x)) { | |
524 | getecptout(p, x); | |
525 | goto fix; | |
526 | } else if (PyString_Check(x)) { | |
ba033513 | 527 | if (PyObject_AsReadBuffer(x, &q, &n)) |
d7ab1bab | 528 | goto end; |
529 | qd.p = q; | |
530 | qd.e = 0; | |
531 | if (!ec_ptparse(&qd, p)) | |
80f7cd89 | 532 | VALERR(qd.e); |
d7ab1bab | 533 | goto fix; |
534 | } else if (c && (xx = tomp(x)) != 0) { | |
535 | xx = F_IN(c->f, xx, xx); | |
536 | if (!EC_FIND(c, p, xx)) VALERR("not on the curve"); | |
537 | } else if (PySequence_Check(x)) { | |
538 | t = x; x = 0; | |
4281a7ee | 539 | n = PySequence_Size(t); if (n < 0) goto end; |
d7ab1bab | 540 | if (n != 2 && (n != 3 || !c)) |
541 | TYERR("want sequence of two or three items"); | |
542 | if ((x = PySequence_GetItem(t, 0)) == 0 || | |
543 | (y = PySequence_GetItem(t, 1)) == 0 || | |
544 | (n == 3 && (z = PySequence_GetItem(t, 2)) == 0)) | |
545 | goto end; | |
546 | rc = (n == 2) ? ecptxl_2(c, p, x, y) : ecptxl_3(c, p, x, y, z); | |
e91150b2 | 547 | goto end; |
d7ab1bab | 548 | } else |
549 | TYERR("can't convert to curve point"); | |
550 | goto ok; | |
551 | ||
552 | fix: | |
553 | if (c) EC_IN(c, p, p); | |
554 | ok: | |
555 | rc = 0; | |
556 | end: | |
557 | Py_XDECREF(x); Py_XDECREF(y); Py_XDECREF(z); Py_XDECREF(t); | |
558 | mp_drop(xx); | |
559 | return (rc); | |
560 | } | |
561 | ||
562 | static int ecptxl(ec_curve *c, ec *p, PyObject *x, PyObject *y, PyObject *z) | |
563 | { | |
564 | if (z) | |
565 | return (ecptxl_3(c, p, x, y, z)); | |
566 | else if (y) | |
567 | return (ecptxl_2(c, p, x, y)); | |
568 | else | |
569 | return (ecptxl_1(c, p, x)); | |
570 | } | |
571 | ||
d7ab1bab | 572 | static PyObject *ecptnc_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) |
573 | { | |
574 | PyObject *x = 0, *y = 0, *z = 0; | |
575 | ec p = EC_INIT; | |
827f89d7 | 576 | static const char *const kwlist[] = { "x", "y", 0 }; |
d7ab1bab | 577 | |
827f89d7 | 578 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &x, &y) || |
d7ab1bab | 579 | ecptxl(0, &p, x, y, z)) |
580 | goto end; | |
581 | return (ecpt_pywrapout(ty, &p)); | |
582 | end: | |
08720fe0 | 583 | mp_drop(p.x); mp_drop(p.y); mp_drop(p.z); |
d7ab1bab | 584 | return (0); |
585 | } | |
586 | ||
587 | static PyObject *ecpt_pyint(PyObject *me) | |
588 | { | |
589 | ec p = EC_INIT; | |
590 | long l; | |
591 | PyObject *rc = 0; | |
592 | if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity"); | |
593 | getecptout(&p, me); | |
bc243788 MW |
594 | if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l); |
595 | else rc = mp_topylong(p.x); | |
d7ab1bab | 596 | end: |
597 | EC_DESTROY(&p); | |
598 | return (rc); | |
599 | } | |
600 | ||
601 | static PyObject *ecpt_pylong(PyObject *me) | |
602 | { | |
603 | ec p = EC_INIT; | |
604 | PyObject *rc = 0; | |
605 | if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity"); | |
606 | getecptout(&p, me); | |
f368b46e | 607 | rc = mp_topylong(p.x); |
d7ab1bab | 608 | end: |
609 | EC_DESTROY(&p); | |
610 | return (rc); | |
611 | } | |
612 | ||
613 | static PyObject *ecpt_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) | |
614 | { | |
615 | PyObject *x = 0, *y = 0, *z = 0; | |
616 | ec p = EC_INIT; | |
827f89d7 | 617 | static const char *const kwlist[] = { "x", "y", "z", 0 }; |
d7ab1bab | 618 | |
827f89d7 | 619 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OOO:new", KWLIST, |
d7ab1bab | 620 | &x, &y, &z) || |
621 | ecptxl(ECCURVE_C(ty), &p, x, y, z)) | |
622 | goto end; | |
623 | return (ecpt_pywrap((PyObject *)ty, &p)); | |
624 | end: | |
08720fe0 | 625 | mp_drop(p.x); mp_drop(p.y); mp_drop(p.z); |
d7ab1bab | 626 | return (0); |
627 | } | |
628 | ||
c90f712e | 629 | static const PyGetSetDef ecptnc_pygetset[] = { |
d7ab1bab | 630 | #define GETSETNAME(op, name) epnc##op##_##name |
631 | GET (ix, "P.ix -> integer x coordinate of P") | |
632 | GET (iy, "P.iy -> integer y coordinate of P") | |
633 | GET (point, "P.point -> standalone curve point (no-op)") | |
634 | #undef GETSETNAME | |
635 | { 0 } | |
636 | }; | |
637 | ||
c90f712e | 638 | static const PyMethodDef ecptnc_pymethods[] = { |
d7ab1bab | 639 | #define METHNAME(func) epmeth_##func |
91e56f06 | 640 | NAMETH(tobuf, "X.tobuf() -> BIN") |
a157093f MW |
641 | CMTH (frombuf, "frombuf(STR) -> (P, REST)") |
642 | CMTH (parse, "parse(STR) -> (P, REST)") | |
d7ab1bab | 643 | #undef METHNAME |
644 | { 0 } | |
645 | }; | |
646 | ||
c90f712e | 647 | static const PyNumberMethods ecpt_pynumber = { |
d7ab1bab | 648 | 0, /* @nb_add@ */ |
649 | 0, /* @nb_subtract@ */ | |
650 | 0, /* @nb_multiply@ */ | |
651 | 0, /* @nb_divide@ */ | |
652 | 0, /* @nb_remainder@ */ | |
653 | 0, /* @nb_divmod@ */ | |
654 | 0, /* @nb_power@ */ | |
655 | 0, /* @nb_negative@ */ | |
656 | 0, /* @nb_positive@ */ | |
657 | 0, /* @nb_absolute@ */ | |
658 | ecpt_pynonzerop, /* @nb_nonzero@ */ | |
659 | 0, /* @nb_invert@ */ | |
660 | 0, /* @nb_lshift@ */ | |
661 | 0, /* @nb_rshift@ */ | |
662 | 0, /* @nb_and@ */ | |
663 | 0, /* @nb_xor@ */ | |
664 | 0, /* @nb_or@ */ | |
665 | 0, /* @nb_coerce@ */ | |
666 | ecpt_pyint, /* @nb_int@ */ | |
667 | ecpt_pylong, /* @nb_long@ */ | |
668 | 0, /* @nb_float@ */ | |
669 | 0, /* @nb_oct@ */ | |
670 | 0, /* @nb_hex@ */ | |
671 | ||
672 | 0, /* @nb_inplace_add@ */ | |
673 | 0, /* @nb_inplace_subtract@ */ | |
674 | 0, /* @nb_inplace_multiply@ */ | |
675 | 0, /* @nb_inplace_divide@ */ | |
676 | 0, /* @nb_inplace_remainder@ */ | |
677 | 0, /* @nb_inplace_power@ */ | |
678 | 0, /* @nb_inplace_lshift@ */ | |
679 | 0, /* @nb_inplace_rshift@ */ | |
680 | 0, /* @nb_inplace_and@ */ | |
681 | 0, /* @nb_inplace_xor@ */ | |
682 | 0, /* @nb_inplace_or@ */ | |
683 | ||
684 | 0, /* @nb_floor_divide@ */ | |
685 | 0, /* @nb_true_divide@ */ | |
686 | 0, /* @nb_inplace_floor_divide@ */ | |
687 | 0, /* @nb_inplace_true_divide@ */ | |
688 | }; | |
689 | ||
690 | static PyTypeObject ecpt_pytype_skel = { | |
6d4db0bf | 691 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 692 | "ECPt", /* @tp_name@ */ |
d7ab1bab | 693 | sizeof(ecpt_pyobj), /* @tp_basicsize@ */ |
694 | 0, /* @tp_itemsize@ */ | |
695 | ||
696 | ecpt_pydealloc, /* @tp_dealloc@ */ | |
697 | 0, /* @tp_print@ */ | |
698 | 0, /* @tp_getattr@ */ | |
699 | 0, /* @tp_setattr@ */ | |
700 | 0, /* @tp_compare@ */ | |
701 | 0, /* @tp_repr@ */ | |
c90f712e | 702 | PYNUMBER(ecpt), /* @tp_as_number@ */ |
d7ab1bab | 703 | 0, /* @tp_as_sequence@ */ |
704 | 0, /* @tp_as_mapping@ */ | |
705 | ecpt_pyhash, /* @tp_hash@ */ | |
706 | 0, /* @tp_call@ */ | |
707 | 0, /* @tp_str@ */ | |
708 | 0, /* @tp_getattro@ */ | |
709 | 0, /* @tp_setattro@ */ | |
710 | 0, /* @tp_as_buffer@ */ | |
711 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
712 | Py_TPFLAGS_CHECKTYPES | | |
713 | Py_TPFLAGS_BASETYPE, | |
714 | ||
715 | /* @tp_doc@ */ | |
d96c882e MW |
716 | "ECPt([X, [Y]]): elliptic curve points, not associated with any curve.\n" |
717 | " X alone may be None, an existing point, a string 'X, Y', an\n" | |
718 | " x-coordinate, or a pair (X, Y); X and Y should be a coordinate pair.", | |
d7ab1bab | 719 | |
720 | 0, /* @tp_traverse@ */ | |
721 | 0, /* @tp_clear@ */ | |
722 | ecpt_pyrichcompare, /* @tp_richcompare@ */ | |
723 | 0, /* @tp_weaklistoffset@ */ | |
724 | 0, /* @tp_iter@ */ | |
963a6148 | 725 | 0, /* @tp_iternext@ */ |
c90f712e | 726 | PYMETHODS(ecptnc), /* @tp_methods@ */ |
d7ab1bab | 727 | 0, /* @tp_members@ */ |
c90f712e | 728 | PYGETSET(ecptnc), /* @tp_getset@ */ |
d7ab1bab | 729 | 0, /* @tp_base@ */ |
730 | 0, /* @tp_dict@ */ | |
731 | 0, /* @tp_descr_get@ */ | |
732 | 0, /* @tp_descr_set@ */ | |
733 | 0, /* @tp_dictoffset@ */ | |
734 | 0, /* @tp_init@ */ | |
735 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
736 | ecptnc_pynew, /* @tp_new@ */ | |
3aa33042 | 737 | 0, /* @tp_free@ */ |
d7ab1bab | 738 | 0 /* @tp_is_gc@ */ |
739 | }; | |
740 | ||
c90f712e | 741 | static const PyGetSetDef ecpt_pygetset[] = { |
d7ab1bab | 742 | #define GETSETNAME(op, name) ep##op##_##name |
743 | GET (curve, "P.curve -> elliptic curve containing P") | |
744 | GET (point, "P.point -> standalone curve point") | |
745 | GET (x, "P.x -> Cartesian x coordinate of P") | |
746 | GET (y, "P.y -> Cartesian y coordinate of P") | |
747 | GET (_x, "P._x -> internal x coordinate of P") | |
748 | GET (_y, "P._y -> internal y coordinate of P") | |
749 | GET (_z, "P._z -> internal z coordinate of P, or None") | |
750 | #undef GETSETNAME | |
751 | { 0 } | |
752 | }; | |
753 | ||
c90f712e | 754 | static const PyMethodDef ecpt_pymethods[] = { |
d7ab1bab | 755 | #define METHNAME(func) epmeth_##func |
91e56f06 | 756 | NAMETH(toraw, "X.toraw() -> BIN") |
e12df5f3 | 757 | KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN") |
91e56f06 MW |
758 | NAMETH(dbl, "X.dbl() -> X + X") |
759 | NAMETH(oncurvep, "X.oncurvep() -> BOOL") | |
a157093f MW |
760 | CMTH (fromraw, "fromraw(STR) -> (P, REST)") |
761 | KWCMTH(os2ecp, "os2ecp(STR, [flags = ...]) -> (P, REST)") | |
d7ab1bab | 762 | #undef METHNAME |
763 | { 0 } | |
764 | }; | |
765 | ||
c90f712e | 766 | static const PyNumberMethods ecptcurve_pynumber = { |
d7ab1bab | 767 | ecpt_pyadd, /* @nb_add@ */ |
768 | ecpt_pysub, /* @nb_subtract@ */ | |
769 | ecpt_pymul, /* @nb_multiply@ */ | |
770 | 0, /* @nb_divide@ */ | |
771 | 0, /* @nb_remainder@ */ | |
772 | 0, /* @nb_divmod@ */ | |
773 | 0, /* @nb_power@ */ | |
774 | ecpt_pyneg, /* @nb_negative@ */ | |
775 | ecpt_pyid, /* @nb_positive@ */ | |
776 | 0, /* @nb_absolute@ */ | |
777 | 0, /* @nb_nonzero@ */ | |
778 | 0, /* @nb_invert@ */ | |
779 | 0, /* @nb_lshift@ */ | |
780 | 0, /* @nb_rshift@ */ | |
781 | 0, /* @nb_and@ */ | |
782 | 0, /* @nb_xor@ */ | |
783 | 0, /* @nb_or@ */ | |
784 | 0, /* @nb_coerce@ */ | |
785 | 0, /* @nb_int@ */ | |
786 | 0, /* @nb_long@ */ | |
787 | 0, /* @nb_float@ */ | |
788 | 0, /* @nb_oct@ */ | |
789 | 0, /* @nb_hex@ */ | |
790 | ||
791 | 0, /* @nb_inplace_add@ */ | |
792 | 0, /* @nb_inplace_subtract@ */ | |
793 | 0, /* @nb_inplace_multiply@ */ | |
794 | 0, /* @nb_inplace_divide@ */ | |
795 | 0, /* @nb_inplace_remainder@ */ | |
796 | 0, /* @nb_inplace_power@ */ | |
797 | 0, /* @nb_inplace_lshift@ */ | |
798 | 0, /* @nb_inplace_rshift@ */ | |
799 | 0, /* @nb_inplace_and@ */ | |
800 | 0, /* @nb_inplace_xor@ */ | |
801 | 0, /* @nb_inplace_or@ */ | |
802 | ||
803 | 0, /* @nb_floor_divide@ */ | |
804 | 0, /* @nb_true_divide@ */ | |
805 | 0, /* @nb_inplace_floor_divide@ */ | |
806 | 0, /* @nb_inplace_true_divide@ */ | |
807 | }; | |
808 | ||
809 | static PyTypeObject ecptcurve_pytype_skel = { | |
6d4db0bf | 810 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 811 | "ECPtCurve", /* @tp_name@ */ |
d7ab1bab | 812 | sizeof(ecpt_pyobj), /* @tp_basicsize@ */ |
813 | 0, /* @tp_itemsize@ */ | |
814 | ||
815 | ecpt_pydealloc, /* @tp_dealloc@ */ | |
816 | 0, /* @tp_print@ */ | |
817 | 0, /* @tp_getattr@ */ | |
818 | 0, /* @tp_setattr@ */ | |
819 | 0, /* @tp_compare@ */ | |
820 | 0, /* @tp_repr@ */ | |
c90f712e | 821 | PYNUMBER(ecptcurve), /* @tp_as_number@ */ |
d7ab1bab | 822 | 0, /* @tp_as_sequence@ */ |
823 | 0, /* @tp_as_mapping@ */ | |
824 | 0, /* @tp_hash@ */ | |
825 | 0, /* @tp_call@ */ | |
826 | 0, /* @tp_str@ */ | |
827 | 0, /* @tp_getattro@ */ | |
828 | 0, /* @tp_setattro@ */ | |
829 | 0, /* @tp_as_buffer@ */ | |
830 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
831 | Py_TPFLAGS_CHECKTYPES | | |
832 | Py_TPFLAGS_BASETYPE, | |
833 | ||
834 | /* @tp_doc@ */ | |
d96c882e | 835 | "Elliptic curve points; abstract base class for points on given curves.", |
d7ab1bab | 836 | |
837 | 0, /* @tp_traverse@ */ | |
838 | 0, /* @tp_clear@ */ | |
839 | 0, /* @tp_richcompare@ */ | |
840 | 0, /* @tp_weaklistoffset@ */ | |
841 | 0, /* @tp_iter@ */ | |
963a6148 | 842 | 0, /* @tp_iternext@ */ |
c90f712e | 843 | PYMETHODS(ecpt), /* @tp_methods@ */ |
d7ab1bab | 844 | 0, /* @tp_members@ */ |
c90f712e | 845 | PYGETSET(ecpt), /* @tp_getset@ */ |
d7ab1bab | 846 | 0, /* @tp_base@ */ |
847 | 0, /* @tp_dict@ */ | |
848 | 0, /* @tp_descr_get@ */ | |
849 | 0, /* @tp_descr_set@ */ | |
850 | 0, /* @tp_dictoffset@ */ | |
851 | 0, /* @tp_init@ */ | |
852 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
853 | abstract_pynew, /* @tp_new@ */ | |
3aa33042 | 854 | 0, /* @tp_free@ */ |
d7ab1bab | 855 | 0 /* @tp_is_gc@ */ |
856 | }; | |
857 | ||
858 | /*----- Elliptic curves themselves ----------------------------------------*/ | |
859 | ||
860 | static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op) | |
861 | { | |
7f8c2476 MW |
862 | int b; |
863 | ||
864 | assert(ECCURVE_PYCHECK(x)); | |
865 | if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL; | |
866 | b = ec_samep(ECCURVE_C(x), ECCURVE_C(y)); | |
d7ab1bab | 867 | switch (op) { |
868 | case Py_EQ: break; | |
2c1ccbae | 869 | case Py_NE: b = !b; break; |
d7ab1bab | 870 | default: TYERR("can't order elliptic curves"); |
871 | } | |
872 | return (getbool(b)); | |
873 | end: | |
874 | return (0); | |
875 | } | |
876 | ||
877 | static PyObject *ecmmul_id(PyObject *me) | |
878 | { ec p = EC_INIT; return (ecpt_pywrap(me, &p)); } | |
879 | ||
880 | static int ecmmul_fill(void *pp, PyObject *me, PyObject *x, PyObject *m) | |
881 | { | |
882 | ec_mulfactor *f = pp; | |
883 | ||
50bff227 | 884 | EC_CREATE(&f->base); |
d7ab1bab | 885 | if (getecpt(ECCURVE_C(me), &f->base, x) || |
886 | (f->exp = getmp(m)) == 0) | |
887 | return (-1); | |
d7ab1bab | 888 | return (0); |
889 | } | |
890 | ||
891 | static PyObject *ecmmul_exp(PyObject *me, void *pp, int n) | |
892 | { | |
893 | ec p = EC_INIT; | |
894 | ec_immul(ECCURVE_C(me), &p, pp, n); | |
895 | return (ecpt_pywrap(me, &p)); | |
896 | } | |
897 | ||
898 | static void ecmmul_drop(void *pp) | |
899 | { | |
900 | ec_mulfactor *f = pp; | |
901 | EC_DESTROY(&f->base); | |
902 | MP_DROP(f->exp); | |
903 | } | |
904 | ||
905 | static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg) | |
906 | { | |
907 | return (mexp_common(me, arg, sizeof(ec_mulfactor), | |
908 | ecmmul_id, ecmmul_fill, ecmmul_exp, ecmmul_drop)); | |
909 | } | |
910 | ||
d7ab1bab | 911 | static void eccurve_pydealloc(PyObject *me) |
912 | { | |
913 | ec_destroycurve(ECCURVE_C(me)); | |
914 | Py_DECREF(ECCURVE_FOBJ(me)); | |
915 | PyType_Type.tp_dealloc(me); | |
916 | } | |
917 | ||
918 | static PyObject *ecmeth_find(PyObject *me, PyObject *arg) | |
919 | { | |
920 | PyObject *x; | |
921 | mp *xx = 0; | |
922 | ec p = EC_INIT; | |
923 | PyObject *rc = 0; | |
924 | ||
925 | if (!PyArg_ParseTuple(arg, "O:find", &x)) goto end; | |
926 | if (FIELD_PYCHECK(x) && FE_F(x) == ECCURVE_C(me)->f) | |
927 | xx = MP_COPY(FE_X(x)); | |
928 | else if ((xx = getmp(x)) == 0) | |
929 | goto end; | |
930 | else | |
931 | xx = F_IN(ECCURVE_C(me)->f, xx, xx); | |
932 | if (EC_FIND(ECCURVE_C(me), &p, xx) == 0) | |
933 | VALERR("not on the curve"); | |
934 | rc = ecpt_pywrap(me, &p); | |
935 | end: | |
936 | if (xx) MP_DROP(xx); | |
937 | return (rc); | |
938 | } | |
939 | ||
940 | static PyObject *ecmeth_rand(PyObject *me, PyObject *arg, PyObject *kw) | |
941 | { | |
827f89d7 | 942 | static const char *const kwlist[] = { "rng", 0 }; |
d7ab1bab | 943 | grand *r = &rand_global; |
944 | ec p = EC_INIT; | |
945 | ||
827f89d7 | 946 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", KWLIST, |
d7ab1bab | 947 | convgrand, &r)) |
948 | return (0); | |
949 | ec_rand(ECCURVE_C(me), &p, r); | |
950 | EC_IN(ECCURVE_C(me), &p, &p); | |
951 | return (ecpt_pywrap(me, &p)); | |
952 | } | |
953 | ||
a157093f | 954 | static PyObject *ecmeth_parse(PyObject *me, PyObject *arg) |
f281293c MW |
955 | { |
956 | char *p; | |
957 | qd_parse qd; | |
958 | ec_curve *c; | |
959 | PyObject *rc = 0; | |
960 | ||
a157093f | 961 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
962 | qd.p = p; qd.e = 0; |
963 | if ((c = ec_curveparse(&qd)) == 0) VALERR(qd.e); | |
964 | rc = eccurve_pywrap(0, c); | |
965 | end: | |
966 | return (rc); | |
967 | } | |
968 | ||
d7ab1bab | 969 | static PyObject *eccurve_dopywrap(PyTypeObject *ty, |
970 | PyObject *fobj, ec_curve *c) | |
971 | { | |
df9f8366 | 972 | eccurve_pyobj *cobj = newtype(ty, 0, c->ops->name); |
d7ab1bab | 973 | cobj->c = c; |
974 | cobj->fobj = fobj; | |
24b3d57b MW |
975 | cobj->ty.ht_type.tp_basicsize = sizeof(ecpt_pyobj); |
976 | cobj->ty.ht_type.tp_base = ecptcurve_pytype; | |
d7ab1bab | 977 | Py_INCREF(ecptcurve_pytype); |
24b3d57b MW |
978 | cobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT | |
979 | Py_TPFLAGS_BASETYPE | | |
980 | Py_TPFLAGS_CHECKTYPES | | |
981 | Py_TPFLAGS_HEAPTYPE); | |
982 | cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc; | |
983 | cobj->ty.ht_type.tp_free = 0; | |
984 | cobj->ty.ht_type.tp_new = ecpt_pynew; | |
dc075750 | 985 | typeready(&cobj->ty.ht_type); |
d7ab1bab | 986 | return ((PyObject *)cobj); |
987 | } | |
988 | ||
989 | PyObject *eccurve_pywrap(PyObject *fobj, ec_curve *c) | |
990 | { | |
991 | PyTypeObject *ty; | |
992 | ||
993 | if (!fobj) | |
994 | fobj = field_pywrap(c->f); | |
995 | else | |
996 | Py_INCREF(fobj); | |
997 | assert(FIELD_F(fobj) == c->f); | |
20441612 | 998 | if (STRCMP(EC_NAME(c), ==, "prime")) |
d7ab1bab | 999 | ty = ecprimecurve_pytype; |
20441612 | 1000 | else if (STRCMP(EC_NAME(c), ==, "primeproj")) |
d7ab1bab | 1001 | ty = ecprimeprojcurve_pytype; |
20441612 | 1002 | else if (STRCMP(EC_NAME(c), ==, "bin")) |
d7ab1bab | 1003 | ty = ecbincurve_pytype; |
20441612 | 1004 | else if (STRCMP(EC_NAME(c), ==, "binproj")) |
d7ab1bab | 1005 | ty = ecbinprojcurve_pytype; |
1006 | else | |
1007 | abort(); | |
1008 | return (eccurve_dopywrap(ty, fobj, c)); | |
1009 | } | |
1010 | ||
1011 | static PyObject *eccurve_pynew(PyTypeObject *ty, | |
1012 | ec_curve *(*make)(field *, mp *, mp *), | |
1013 | PyObject *arg, PyObject *kw) | |
1014 | { | |
1015 | PyObject *fobj; | |
1016 | PyObject *cobj = 0; | |
827f89d7 | 1017 | static const char *const kwlist[] = { "field", "a", "b", 0 }; |
d7ab1bab | 1018 | mp *aa = 0, *bb = 0; |
1019 | ||
827f89d7 | 1020 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O&O&", KWLIST, |
d7ab1bab | 1021 | field_pytype, &fobj, |
1022 | convmp, &aa, convmp, &bb)) | |
1023 | goto end; | |
1024 | Py_INCREF(fobj); | |
1025 | cobj = eccurve_dopywrap(ty, fobj, make(FIELD_F(fobj), aa, bb)); | |
1026 | end: | |
1027 | if (aa) MP_DROP(aa); | |
1028 | if (bb) MP_DROP(bb); | |
1029 | return (cobj); | |
1030 | } | |
1031 | ||
d7ab1bab | 1032 | static PyObject *ecget_name(PyObject *me, void *hunoz) |
1033 | { return (PyString_FromString(EC_NAME(ECCURVE_C(me)))); } | |
1034 | ||
1035 | static PyObject *ecget_a(PyObject *me, void *hunoz) | |
1036 | { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); } | |
1037 | ||
b2687a0a | 1038 | static PyObject *ecget_b(PyObject *me, void *hunoz) |
d7ab1bab | 1039 | { return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); } |
1040 | ||
1041 | static PyObject *ecget_field(PyObject *me, void *hunoz) | |
1042 | { RETURN_OBJ(ECCURVE_FOBJ(me)); } | |
1043 | ||
1044 | static PyObject *ecget_inf(PyObject *me, void *hunoz) | |
1045 | { ec inf = EC_INIT; return (ecpt_pywrap(me, &inf)); } | |
1046 | ||
c90f712e | 1047 | static const PyGetSetDef eccurve_pygetset[] = { |
d7ab1bab | 1048 | #define GETSETNAME(op, name) ec##op##_##name |
1049 | GET (name, "E.name -> name of this kind of curve") | |
1050 | GET (a, "E.a -> first parameter of curve") | |
1051 | GET (b, "E.b -> second parameter of curve") | |
1052 | GET (field, "E.field -> finite field containing this curve") | |
1053 | GET (inf, "E.inf -> point at infinity of this curve") | |
1054 | #undef GETSETNAME | |
1055 | { 0 } | |
b2687a0a | 1056 | }; |
d7ab1bab | 1057 | |
c90f712e | 1058 | static const PyMethodDef eccurve_pymethods[] = { |
d7ab1bab | 1059 | #define METHNAME(name) ecmeth_##name |
d96c882e | 1060 | METH (mmul, "E.mmul([(P0, N0), (P1, N1), ...]) = N0 P0 + N1 P1 + ...") |
d7ab1bab | 1061 | METH (find, "E.find(X) -> P") |
1df8d5fe | 1062 | KWMETH(rand, "E.rand([rng = rand]) -> P") |
a157093f | 1063 | SMTH (parse, "parse(STR) -> (E, REST)") |
d7ab1bab | 1064 | #undef METHNAME |
1065 | { 0 } | |
1066 | }; | |
1067 | ||
1068 | static PyTypeObject eccurve_pytype_skel = { | |
6d4db0bf | 1069 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1070 | "ECCurve", /* @tp_name@ */ |
d7ab1bab | 1071 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1072 | 0, /* @tp_itemsize@ */ | |
1073 | ||
1074 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1075 | 0, /* @tp_print@ */ | |
1076 | 0, /* @tp_getattr@ */ | |
1077 | 0, /* @tp_setattr@ */ | |
1078 | 0, /* @tp_compare@ */ | |
1079 | 0, /* @tp_repr@ */ | |
1080 | 0, /* @tp_as_number@ */ | |
1081 | 0, /* @tp_as_sequence@ */ | |
1082 | 0, /* @tp_as_mapping@ */ | |
1083 | 0, /* @tp_hash@ */ | |
1084 | 0, /* @tp_call@ */ | |
1085 | 0, /* @tp_str@ */ | |
1086 | 0, /* @tp_getattro@ */ | |
1087 | 0, /* @tp_setattro@ */ | |
1088 | 0, /* @tp_as_buffer@ */ | |
1089 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1090 | Py_TPFLAGS_BASETYPE, | |
1091 | ||
1092 | /* @tp_doc@ */ | |
d96c882e | 1093 | "An elliptic curve. Abstract class.", |
d7ab1bab | 1094 | |
1095 | 0, /* @tp_traverse@ */ | |
1096 | 0, /* @tp_clear@ */ | |
1097 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1098 | 0, /* @tp_weaklistoffset@ */ | |
1099 | 0, /* @tp_iter@ */ | |
963a6148 | 1100 | 0, /* @tp_iternext@ */ |
c90f712e | 1101 | PYMETHODS(eccurve), /* @tp_methods@ */ |
d7ab1bab | 1102 | 0, /* @tp_members@ */ |
c90f712e | 1103 | PYGETSET(eccurve), /* @tp_getset@ */ |
d7ab1bab | 1104 | 0, /* @tp_base@ */ |
1105 | 0, /* @tp_dict@ */ | |
1106 | 0, /* @tp_descr_get@ */ | |
1107 | 0, /* @tp_descr_set@ */ | |
1108 | 0, /* @tp_dictoffset@ */ | |
1109 | 0, /* @tp_init@ */ | |
1110 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1111 | abstract_pynew, /* @tp_new@ */ | |
3aa33042 | 1112 | 0, /* @tp_free@ */ |
d7ab1bab | 1113 | 0 /* @tp_is_gc@ */ |
1114 | }; | |
1115 | ||
1116 | static PyObject *ecprimecurve_pynew(PyTypeObject *ty, | |
1117 | PyObject *arg, PyObject *kw) | |
1118 | { | |
1119 | return (eccurve_pynew(ty, ec_prime, arg, kw)); | |
1120 | } | |
1121 | ||
1122 | static PyTypeObject ecprimecurve_pytype_skel = { | |
6d4db0bf | 1123 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1124 | "ECPrimeCurve", /* @tp_name@ */ |
d7ab1bab | 1125 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1126 | 0, /* @tp_itemsize@ */ | |
1127 | ||
1128 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1129 | 0, /* @tp_print@ */ | |
1130 | 0, /* @tp_getattr@ */ | |
1131 | 0, /* @tp_setattr@ */ | |
1132 | 0, /* @tp_compare@ */ | |
1133 | 0, /* @tp_repr@ */ | |
1134 | 0, /* @tp_as_number@ */ | |
1135 | 0, /* @tp_as_sequence@ */ | |
1136 | 0, /* @tp_as_mapping@ */ | |
1137 | 0, /* @tp_hash@ */ | |
1138 | 0, /* @tp_call@ */ | |
1139 | 0, /* @tp_str@ */ | |
1140 | 0, /* @tp_getattro@ */ | |
1141 | 0, /* @tp_setattro@ */ | |
1142 | 0, /* @tp_as_buffer@ */ | |
1143 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1144 | Py_TPFLAGS_BASETYPE, | |
1145 | ||
1146 | /* @tp_doc@ */ | |
d96c882e MW |
1147 | "ECPrimeCurve(FIELD, A, B): an elliptic curve over a prime field.\n" |
1148 | " Use ECPrimeProjCurve instead.", | |
d7ab1bab | 1149 | |
1150 | 0, /* @tp_traverse@ */ | |
1151 | 0, /* @tp_clear@ */ | |
1152 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1153 | 0, /* @tp_weaklistoffset@ */ | |
1154 | 0, /* @tp_iter@ */ | |
963a6148 | 1155 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1156 | 0, /* @tp_methods@ */ |
1157 | 0, /* @tp_members@ */ | |
1158 | 0, /* @tp_getset@ */ | |
1159 | 0, /* @tp_base@ */ | |
1160 | 0, /* @tp_dict@ */ | |
1161 | 0, /* @tp_descr_get@ */ | |
1162 | 0, /* @tp_descr_set@ */ | |
1163 | 0, /* @tp_dictoffset@ */ | |
1164 | 0, /* @tp_init@ */ | |
1165 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1166 | ecprimecurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1167 | 0, /* @tp_free@ */ |
d7ab1bab | 1168 | 0 /* @tp_is_gc@ */ |
1169 | }; | |
1170 | ||
1171 | static PyObject *ecprimeprojcurve_pynew(PyTypeObject *ty, | |
1172 | PyObject *arg, PyObject *kw) | |
1173 | { | |
1174 | return (eccurve_pynew(ty, ec_primeproj, arg, kw)); | |
1175 | } | |
1176 | ||
1177 | static PyTypeObject ecprimeprojcurve_pytype_skel = { | |
6d4db0bf | 1178 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1179 | "ECPrimeProjCurve", /* @tp_name@ */ |
d7ab1bab | 1180 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1181 | 0, /* @tp_itemsize@ */ | |
1182 | ||
1183 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1184 | 0, /* @tp_print@ */ | |
1185 | 0, /* @tp_getattr@ */ | |
1186 | 0, /* @tp_setattr@ */ | |
1187 | 0, /* @tp_compare@ */ | |
1188 | 0, /* @tp_repr@ */ | |
1189 | 0, /* @tp_as_number@ */ | |
1190 | 0, /* @tp_as_sequence@ */ | |
1191 | 0, /* @tp_as_mapping@ */ | |
1192 | 0, /* @tp_hash@ */ | |
1193 | 0, /* @tp_call@ */ | |
1194 | 0, /* @tp_str@ */ | |
1195 | 0, /* @tp_getattro@ */ | |
1196 | 0, /* @tp_setattro@ */ | |
1197 | 0, /* @tp_as_buffer@ */ | |
1198 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1199 | Py_TPFLAGS_BASETYPE, | |
1200 | ||
1201 | /* @tp_doc@ */ | |
d96c882e MW |
1202 | "ECPrimeProjCurve(FIELD, A, B): an elliptic curve over a prime field\n" |
1203 | " using projective coordinates.", | |
d7ab1bab | 1204 | |
1205 | 0, /* @tp_traverse@ */ | |
1206 | 0, /* @tp_clear@ */ | |
1207 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1208 | 0, /* @tp_weaklistoffset@ */ | |
1209 | 0, /* @tp_iter@ */ | |
963a6148 | 1210 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1211 | 0, /* @tp_methods@ */ |
1212 | 0, /* @tp_members@ */ | |
1213 | 0, /* @tp_getset@ */ | |
1214 | 0, /* @tp_base@ */ | |
1215 | 0, /* @tp_dict@ */ | |
1216 | 0, /* @tp_descr_get@ */ | |
1217 | 0, /* @tp_descr_set@ */ | |
1218 | 0, /* @tp_dictoffset@ */ | |
1219 | 0, /* @tp_init@ */ | |
1220 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1221 | ecprimeprojcurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1222 | 0, /* @tp_free@ */ |
d7ab1bab | 1223 | 0 /* @tp_is_gc@ */ |
1224 | }; | |
1225 | ||
1226 | static PyObject *ecbincurve_pynew(PyTypeObject *ty, | |
1227 | PyObject *arg, PyObject *kw) | |
1228 | { | |
1229 | return (eccurve_pynew(ty, ec_bin, arg, kw)); | |
1230 | } | |
1231 | ||
1232 | static PyTypeObject ecbincurve_pytype_skel = { | |
6d4db0bf | 1233 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1234 | "ECBinCurve", /* @tp_name@ */ |
d7ab1bab | 1235 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1236 | 0, /* @tp_itemsize@ */ | |
1237 | ||
1238 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1239 | 0, /* @tp_print@ */ | |
1240 | 0, /* @tp_getattr@ */ | |
1241 | 0, /* @tp_setattr@ */ | |
1242 | 0, /* @tp_compare@ */ | |
1243 | 0, /* @tp_repr@ */ | |
1244 | 0, /* @tp_as_number@ */ | |
1245 | 0, /* @tp_as_sequence@ */ | |
1246 | 0, /* @tp_as_mapping@ */ | |
1247 | 0, /* @tp_hash@ */ | |
1248 | 0, /* @tp_call@ */ | |
1249 | 0, /* @tp_str@ */ | |
1250 | 0, /* @tp_getattro@ */ | |
1251 | 0, /* @tp_setattro@ */ | |
1252 | 0, /* @tp_as_buffer@ */ | |
1253 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1254 | Py_TPFLAGS_BASETYPE, | |
1255 | ||
1256 | /* @tp_doc@ */ | |
d96c882e MW |
1257 | "ECBinCurve(FIELD, A, B): an elliptic curve over a binary field.\n" |
1258 | " Use ECBinProjCurve instead.", | |
d7ab1bab | 1259 | |
1260 | 0, /* @tp_traverse@ */ | |
1261 | 0, /* @tp_clear@ */ | |
1262 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1263 | 0, /* @tp_weaklistoffset@ */ | |
1264 | 0, /* @tp_iter@ */ | |
963a6148 | 1265 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1266 | 0, /* @tp_methods@ */ |
1267 | 0, /* @tp_members@ */ | |
1268 | 0, /* @tp_getset@ */ | |
1269 | 0, /* @tp_base@ */ | |
1270 | 0, /* @tp_dict@ */ | |
1271 | 0, /* @tp_descr_get@ */ | |
1272 | 0, /* @tp_descr_set@ */ | |
1273 | 0, /* @tp_dictoffset@ */ | |
1274 | 0, /* @tp_init@ */ | |
1275 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1276 | ecbincurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1277 | 0, /* @tp_free@ */ |
d7ab1bab | 1278 | 0 /* @tp_is_gc@ */ |
1279 | }; | |
1280 | ||
1281 | static PyObject *ecbinprojcurve_pynew(PyTypeObject *ty, | |
1282 | PyObject *arg, PyObject *kw) | |
1283 | { | |
1284 | return (eccurve_pynew(ty, ec_binproj, arg, kw)); | |
1285 | } | |
1286 | ||
1287 | static PyTypeObject ecbinprojcurve_pytype_skel = { | |
6d4db0bf | 1288 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1289 | "ECBinProjCurve", /* @tp_name@ */ |
d7ab1bab | 1290 | sizeof(eccurve_pyobj), /* @tp_basicsize@ */ |
1291 | 0, /* @tp_itemsize@ */ | |
1292 | ||
1293 | eccurve_pydealloc, /* @tp_dealloc@ */ | |
1294 | 0, /* @tp_print@ */ | |
1295 | 0, /* @tp_getattr@ */ | |
1296 | 0, /* @tp_setattr@ */ | |
1297 | 0, /* @tp_compare@ */ | |
1298 | 0, /* @tp_repr@ */ | |
1299 | 0, /* @tp_as_number@ */ | |
1300 | 0, /* @tp_as_sequence@ */ | |
1301 | 0, /* @tp_as_mapping@ */ | |
1302 | 0, /* @tp_hash@ */ | |
1303 | 0, /* @tp_call@ */ | |
1304 | 0, /* @tp_str@ */ | |
1305 | 0, /* @tp_getattro@ */ | |
1306 | 0, /* @tp_setattro@ */ | |
1307 | 0, /* @tp_as_buffer@ */ | |
1308 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1309 | Py_TPFLAGS_BASETYPE, | |
1310 | ||
1311 | /* @tp_doc@ */ | |
d96c882e MW |
1312 | "ECBinProjCurve(FIELD, A, B): an elliptic curve over a binary field,\n" |
1313 | " using projective coordinates.", | |
d7ab1bab | 1314 | |
1315 | 0, /* @tp_traverse@ */ | |
1316 | 0, /* @tp_clear@ */ | |
1317 | eccurve_pyrichcompare, /* @tp_richcompare@ */ | |
1318 | 0, /* @tp_weaklistoffset@ */ | |
1319 | 0, /* @tp_iter@ */ | |
963a6148 | 1320 | 0, /* @tp_iternext@ */ |
d7ab1bab | 1321 | 0, /* @tp_methods@ */ |
1322 | 0, /* @tp_members@ */ | |
1323 | 0, /* @tp_getset@ */ | |
1324 | 0, /* @tp_base@ */ | |
1325 | 0, /* @tp_dict@ */ | |
1326 | 0, /* @tp_descr_get@ */ | |
1327 | 0, /* @tp_descr_set@ */ | |
1328 | 0, /* @tp_dictoffset@ */ | |
1329 | 0, /* @tp_init@ */ | |
1330 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1331 | ecbinprojcurve_pynew, /* @tp_new@ */ | |
3aa33042 | 1332 | 0, /* @tp_free@ */ |
d7ab1bab | 1333 | 0 /* @tp_is_gc@ */ |
1334 | }; | |
1335 | ||
1336 | /*----- Curve info --------------------------------------------------------*/ | |
1337 | ||
1338 | static int ncurves = -1; | |
1339 | ||
1340 | void ecinfo_copy(ec_info *eic, const ec_info *ei) | |
1341 | { | |
1342 | eic->c = eccurve_copy(ei->c); | |
1343 | EC_CREATE(&eic->g); | |
1344 | EC_COPY(&eic->g, &ei->g); | |
1345 | eic->r = MP_COPY(ei->r); | |
1346 | eic->h = MP_COPY(ei->h); | |
1347 | } | |
1348 | ||
1349 | PyObject *ecinfo_pywrap(ec_info *ei) | |
1350 | { | |
1351 | ecinfo_pyobj *o; | |
1352 | ||
1353 | o = PyObject_NEW(ecinfo_pyobj, ecinfo_pytype); | |
1354 | o->ei = *ei; | |
1355 | o->cobj = eccurve_pywrap(0, o->ei.c); | |
1356 | Py_INCREF(o->cobj); | |
1357 | return ((PyObject *)o); | |
1358 | } | |
1359 | ||
1360 | static void ecinfo_pydealloc(PyObject *me) | |
1361 | { | |
1362 | ec_info *ei = ECINFO_EI(me); | |
1363 | EC_DESTROY(&ei->g); | |
1364 | MP_DROP(ei->r); | |
1365 | MP_DROP(ei->h); | |
1366 | Py_DECREF(ECINFO_COBJ(me)); | |
3aa33042 | 1367 | FREEOBJ(me); |
d7ab1bab | 1368 | } |
1369 | ||
1370 | static PyObject *ecinfo_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) | |
1371 | { | |
1372 | ec_info ei = { 0 }; | |
1373 | PyObject *e, *g; | |
827f89d7 | 1374 | static const char *const kwlist[] = { "curve", "G", "r", "h", 0 }; |
d7ab1bab | 1375 | ecinfo_pyobj *rc = 0; |
1376 | ||
827f89d7 | 1377 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O&O&:new", KWLIST, |
d7ab1bab | 1378 | eccurve_pytype, &e, ecpt_pytype, &g, |
1379 | convmp, &ei.r, convmp, &ei.h)) | |
1380 | goto end; | |
1381 | if (ECPT_C(g) != ECCURVE_C(e) && !ec_samep(ECPT_C(g), ECCURVE_C(e))) | |
1382 | TYERR("point not from this curve"); | |
1383 | ei.c = ECCURVE_C(e); | |
1384 | EC_CREATE(&ei.g); | |
30720615 | 1385 | EC_OUT(ei.c, &ei.g, ECPT_P(g)); |
d7ab1bab | 1386 | rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0); |
1387 | rc->ei = ei; | |
1388 | rc->cobj = e; | |
1389 | Py_INCREF(rc->cobj); | |
1390 | return ((PyObject *)rc); | |
1391 | ||
1392 | end: | |
1393 | mp_drop(ei.r); | |
1394 | mp_drop(ei.h); | |
1395 | return (0); | |
1396 | } | |
1397 | ||
a157093f | 1398 | static PyObject *eimeth_parse(PyObject *me, PyObject *arg) |
d7ab1bab | 1399 | { |
1400 | char *p; | |
1401 | qd_parse qd; | |
1402 | ec_info ei; | |
1403 | PyObject *rc = 0; | |
1404 | ||
a157093f | 1405 | if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end; |
f281293c MW |
1406 | qd.p = p; qd.e = 0; |
1407 | if (ec_infoparse(&qd, &ei)) VALERR(qd.e); | |
d7ab1bab | 1408 | rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p); |
1409 | end: | |
1410 | return (rc); | |
1411 | } | |
1412 | ||
a157093f | 1413 | static PyObject *eimeth__curven(PyObject *me, PyObject *arg) |
d7ab1bab | 1414 | { |
1415 | int i; | |
1416 | ec_info ei; | |
1417 | PyObject *rc = 0; | |
1418 | ||
a157093f | 1419 | if (!PyArg_ParseTuple(arg, "i:_curven", &i)) goto end; |
d7ab1bab | 1420 | if (i < 0 || i >= ncurves) VALERR("curve index out of range"); |
1421 | ec_infofromdata(&ei, ectab[i].data); | |
1422 | rc = ecinfo_pywrap(&ei); | |
1423 | end: | |
1424 | return (rc); | |
1425 | } | |
1426 | ||
1427 | static PyObject *ecinfo_pyrichcompare(PyObject *x, PyObject *y, int op) | |
1428 | { | |
1429 | int b = ec_sameinfop(ECINFO_EI(x), ECINFO_EI(y)); | |
1430 | switch (op) { | |
1431 | case Py_EQ: break; | |
1432 | case Py_NE: b = !b; | |
1433 | default: TYERR("can't order elliptic curve infos"); | |
1434 | } | |
1435 | return (getbool(b)); | |
1436 | end: | |
1437 | return (0); | |
1438 | } | |
1439 | ||
1440 | static PyObject *eimeth_check(PyObject *me, PyObject *arg, PyObject *kw) | |
1441 | { | |
827f89d7 | 1442 | static const char *const kwlist[] = { "rng", 0 }; |
d7ab1bab | 1443 | grand *r = &rand_global; |
1444 | const char *p; | |
1445 | ||
827f89d7 | 1446 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:check", KWLIST, |
d7ab1bab | 1447 | convgrand, &r)) |
1448 | goto end; | |
1449 | if ((p = ec_checkinfo(ECINFO_EI(me), r)) != 0) | |
1450 | VALERR(p); | |
1451 | RETURN_ME; | |
1452 | end: | |
1453 | return (0); | |
1454 | } | |
1455 | ||
1456 | static PyObject *eiget_curve(PyObject *me, void *hunoz) | |
1457 | { RETURN_OBJ(ECINFO_COBJ(me)); } | |
1458 | ||
1459 | static PyObject *eiget_G(PyObject *me, void *hunoz) | |
1460 | { | |
1461 | ec_info *ei = ECINFO_EI(me); | |
1462 | ec p = EC_INIT; | |
1463 | EC_IN(ei->c, &p, &ei->g); | |
1464 | return (ecpt_pywrap(ECINFO_COBJ(me), &p)); | |
1465 | } | |
1466 | ||
1467 | static PyObject *eiget_r(PyObject *me, void *hunoz) | |
1468 | { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->r))); } | |
1469 | ||
1470 | static PyObject *eiget_h(PyObject *me, void *hunoz) | |
1471 | { return (mp_pywrap(MP_COPY(ECINFO_EI(me)->h))); } | |
1472 | ||
c90f712e | 1473 | static const PyGetSetDef ecinfo_pygetset[] = { |
d7ab1bab | 1474 | #define GETSETNAME(op, name) ei##op##_##name |
1475 | GET (curve, "I.curve -> the elliptic curve") | |
1476 | GET (G, "I.G -> generator point for the group") | |
1477 | GET (r, "I.r -> order of the group (and hence of G") | |
1478 | GET (h, "I.h -> cofactor of the group") | |
1479 | #undef GETSETNAME | |
1480 | { 0 } | |
1481 | }; | |
1482 | ||
c90f712e | 1483 | static const PyMethodDef ecinfo_pymethods[] = { |
d7ab1bab | 1484 | #define METHNAME(name) eimeth_##name |
2465e84b | 1485 | KWMETH(check, "I.check([rng = rand]) -> None") |
a157093f MW |
1486 | SMTH (parse, "parse(STR) -> (I, REST)") |
1487 | SMTH (_curven, "_curven(N) -> I") | |
d7ab1bab | 1488 | #undef METHNAME |
1489 | { 0 } | |
1490 | }; | |
1491 | ||
1492 | static PyTypeObject ecinfo_pytype_skel = { | |
6d4db0bf | 1493 | PyObject_HEAD_INIT(0) 0, /* Header */ |
c461c9b3 | 1494 | "ECInfo", /* @tp_name@ */ |
d7ab1bab | 1495 | sizeof(ecinfo_pyobj), /* @tp_basicsize@ */ |
1496 | 0, /* @tp_itemsize@ */ | |
1497 | ||
1498 | ecinfo_pydealloc, /* @tp_dealloc@ */ | |
1499 | 0, /* @tp_print@ */ | |
1500 | 0, /* @tp_getattr@ */ | |
1501 | 0, /* @tp_setattr@ */ | |
1502 | 0, /* @tp_compare@ */ | |
1503 | 0, /* @tp_repr@ */ | |
1504 | 0, /* @tp_as_number@ */ | |
1505 | 0, /* @tp_as_sequence@ */ | |
1506 | 0, /* @tp_as_mapping@ */ | |
1507 | 0, /* @tp_hash@ */ | |
1508 | 0, /* @tp_call@ */ | |
1509 | 0, /* @tp_str@ */ | |
1510 | 0, /* @tp_getattro@ */ | |
1511 | 0, /* @tp_setattro@ */ | |
1512 | 0, /* @tp_as_buffer@ */ | |
1513 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ | |
1514 | Py_TPFLAGS_BASETYPE, | |
1515 | ||
1516 | /* @tp_doc@ */ | |
d96c882e | 1517 | "ECInfo(CURVE, G, R, H): elliptic curve domain parameters.", |
d7ab1bab | 1518 | |
1519 | 0, /* @tp_traverse@ */ | |
1520 | 0, /* @tp_clear@ */ | |
1521 | ecinfo_pyrichcompare, /* @tp_richcompare@ */ | |
1522 | 0, /* @tp_weaklistoffset@ */ | |
1523 | 0, /* @tp_iter@ */ | |
963a6148 | 1524 | 0, /* @tp_iternext@ */ |
c90f712e | 1525 | PYMETHODS(ecinfo), /* @tp_methods@ */ |
d7ab1bab | 1526 | 0, /* @tp_members@ */ |
c90f712e | 1527 | PYGETSET(ecinfo), /* @tp_getset@ */ |
d7ab1bab | 1528 | 0, /* @tp_base@ */ |
1529 | 0, /* @tp_dict@ */ | |
1530 | 0, /* @tp_descr_get@ */ | |
1531 | 0, /* @tp_descr_set@ */ | |
1532 | 0, /* @tp_dictoffset@ */ | |
1533 | 0, /* @tp_init@ */ | |
1534 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
1535 | ecinfo_pynew, /* @tp_new@ */ | |
3aa33042 | 1536 | 0, /* @tp_free@ */ |
d7ab1bab | 1537 | 0 /* @tp_is_gc@ */ |
1538 | }; | |
1539 | ||
1540 | /*----- Setup -------------------------------------------------------------*/ | |
1541 | ||
d7ab1bab | 1542 | void ec_pyinit(void) |
1543 | { | |
1544 | INITTYPE(ecpt, root); | |
1545 | INITTYPE(ecptcurve, ecpt); | |
1546 | INITTYPE(eccurve, type); | |
1547 | INITTYPE(ecprimecurve, eccurve); | |
1548 | INITTYPE(ecprimeprojcurve, ecprimecurve); | |
1549 | INITTYPE(ecbincurve, eccurve); | |
1550 | INITTYPE(ecbinprojcurve, ecbincurve); | |
1551 | INITTYPE(ecinfo, root); | |
d7ab1bab | 1552 | } |
1553 | ||
1554 | static PyObject *namedcurves(void) | |
1555 | { | |
1556 | int i, j; | |
1557 | const char *p; | |
1558 | PyObject *d, *c; | |
1559 | ||
1560 | d = PyDict_New(); | |
1561 | for (i = 0; ectab[i].name; i++) { | |
1562 | p = ectab[i].name; | |
1563 | for (j = 0; j < i; j++) { | |
1564 | if (ectab[i].data == ectab[j].data) { | |
1565 | c = PyDict_GetItemString(d, (/*unconst*/ char *)ectab[j].name); | |
1566 | Py_INCREF(c); | |
1567 | goto found; | |
1568 | } | |
1569 | } | |
1570 | c = PyInt_FromLong(i); | |
1571 | found: | |
98963817 | 1572 | PyDict_SetItemString(d, (/*unconst*/ char *)p, c); |
d7ab1bab | 1573 | Py_DECREF(c); |
1574 | } | |
1575 | ncurves = i; | |
1576 | return (d); | |
1577 | } | |
1578 | ||
1579 | void ec_pyinsert(PyObject *mod) | |
1580 | { | |
1581 | INSERT("ECPt", ecpt_pytype); | |
1582 | INSERT("ECPtCurve", ecptcurve_pytype); | |
1583 | INSERT("ECCurve", eccurve_pytype); | |
1584 | INSERT("ECPrimeCurve", ecprimecurve_pytype); | |
1585 | INSERT("ECPrimeProjCurve", ecprimeprojcurve_pytype); | |
1586 | INSERT("ECBinCurve", ecbincurve_pytype); | |
1587 | INSERT("ECBinProjCurve", ecbinprojcurve_pytype); | |
1588 | INSERT("ECInfo", ecinfo_pytype); | |
1589 | INSERT("_eccurves", namedcurves()); | |
1590 | } | |
1591 | ||
1592 | /*----- That's all, folks -------------------------------------------------*/ |