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ec.c, field.c, group.c, mp.c: Fix conversions in `pow' and scalar mul.
[catacomb-python] / group.c
1 /* -*-c-*-
2 *
3 * Abstract group inteface
4 *
5 * (c) 2004 Straylight/Edgeware
6 */
7
8 /*----- Licensing notice --------------------------------------------------*
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.
16 *
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.
21 *
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 /*----- DH and binary group infos -----------------------------------------*/
32
33 static PyTypeObject *fginfo_pytype, *dhinfo_pytype, *bindhinfo_pytype;
34
35 typedef struct fginfo_pyobj {
36 PyObject_HEAD
37 gprime_param dp;
38 } fginfo_pyobj;
39
40 #define FGINFO_DP(fg) (&((fginfo_pyobj *)(fg))->dp)
41
42 static PyObject *fginfo_pywrap(gprime_param *dp, PyTypeObject *ty)
43 {
44 fginfo_pyobj *z = PyObject_New(fginfo_pyobj, ty);
45 z->dp = *dp;
46 return ((PyObject *)z);
47 }
48
49 static PyObject *fginfo_pynew(PyTypeObject *ty,
50 PyObject *arg, PyObject *kw)
51 {
52 static const char *const kwlist[] = { "p", "r", "g", 0 };
53 gprime_param dp = { 0 };
54 fginfo_pyobj *z = 0;
55
56 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&O&:new", KWLIST,
57 convmp, &dp.p,
58 convmp, &dp.q,
59 convmp, &dp.g))
60 goto end;
61 z = PyObject_New(fginfo_pyobj, ty);
62 z->dp = dp;
63 return ((PyObject *)z);
64 end:
65 mp_drop(dp.p);
66 mp_drop(dp.q);
67 mp_drop(dp.g);
68 return (0);
69 }
70
71 static PyObject *figet_r(PyObject *me, void *hunoz)
72 { return mp_pywrap(MP_COPY(FGINFO_DP(me)->q)); }
73
74 static PyObject *diget_p(PyObject *me, void *hunoz)
75 { return mp_pywrap(MP_COPY(FGINFO_DP(me)->p)); }
76
77 static PyObject *diget_g(PyObject *me, void *hunoz)
78 { return mp_pywrap(MP_COPY(FGINFO_DP(me)->g)); }
79
80 static PyObject *biget_p(PyObject *me, void *hunoz)
81 { return gf_pywrap(MP_COPY(FGINFO_DP(me)->p)); }
82
83 static PyObject *biget_m(PyObject *me, void *hunoz)
84 { return PyInt_FromLong(mp_octets(FGINFO_DP(me)->p) - 1); }
85
86 static PyObject *biget_g(PyObject *me, void *hunoz)
87 { return gf_pywrap(MP_COPY(FGINFO_DP(me)->g)); }
88
89 static void fginfo_pydealloc(PyObject *me)
90 {
91 mp_drop(FGINFO_DP(me)->p);
92 mp_drop(FGINFO_DP(me)->q);
93 mp_drop(FGINFO_DP(me)->g);
94 FREEOBJ(me);
95 }
96
97 static PyObject *dimeth_generate(PyObject *me, PyObject *arg, PyObject *kw)
98 {
99 dh_param dp;
100 unsigned ql = 0, pl;
101 unsigned steps = 0;
102 grand *r = &rand_global;
103 struct excinfo exc = EXCINFO_INIT;
104 pypgev evt = { { 0 } };
105 static const char *const kwlist[] =
106 { "pbits", "qbits", "event", "rng", "nsteps", 0 };
107 PyObject *rc = 0;
108
109 evt.exc = &exc;
110 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&O&O&O&:generate", KWLIST,
111 convuint, &pl, convuint, &ql,
112 convpgev, &evt, convgrand, &r,
113 convuint, &steps))
114 goto end;
115 if (dh_gen(&dp, ql, pl, steps, r, evt.ev.proc, evt.ev.ctx))
116 PGENERR(&exc);
117 rc = fginfo_pywrap(&dp, dhinfo_pytype);
118 end:
119 droppgev(&evt);
120 return (rc);
121 }
122
123 static PyObject *dimeth_genlimlee(PyObject *me, PyObject *arg, PyObject *kw)
124 {
125 dh_param dp;
126 unsigned ql, pl;
127 unsigned steps = 0;
128 grand *r = &rand_global;
129 struct excinfo exc = EXCINFO_INIT;
130 pypgev oe = { { 0 } }, ie = { { 0 } };
131 int subgroupp = 1;
132 unsigned f = 0;
133 static const char *const kwlist[] = {
134 "pbits", "qbits", "event", "ievent",
135 "rng", "nsteps", "subgroupp", 0
136 };
137 size_t i, nf;
138 mp **v = 0;
139 PyObject *rc = 0, *vec = 0;
140
141 oe.exc = ie.exc = &exc;
142 if (!PyArg_ParseTupleAndKeywords(arg, kw,
143 "O&O&|O&O&O&O&O&:genlimlee", KWLIST,
144 convuint, &pl, convuint, &ql,
145 convpgev, &oe, convpgev, &ie,
146 convgrand, &r, convuint, &steps,
147 convbool, &subgroupp))
148 goto end;
149 if (subgroupp) f |= DH_SUBGROUP;
150 if (dh_limlee(&dp, ql, pl, f, steps, r,
151 oe.ev.proc, oe.ev.ctx, ie.ev.proc, ie.ev.ctx, &nf, &v))
152 PGENERR(&exc);
153 vec = PyList_New(nf);
154 for (i = 0; i < nf; i++)
155 PyList_SET_ITEM(vec, i, mp_pywrap(v[i]));
156 xfree(v);
157 rc = Py_BuildValue("(NN)", fginfo_pywrap(&dp, dhinfo_pytype), vec);
158 end:
159 droppgev(&oe); droppgev(&ie);
160 return (rc);
161 }
162
163 static PyObject *dimeth_genkcdsa(PyObject *me, PyObject *arg, PyObject *kw)
164 {
165 dh_param dp;
166 unsigned ql, pl;
167 unsigned steps = 0;
168 grand *r = &rand_global;
169 struct excinfo exc = EXCINFO_INIT;
170 pypgev evt = { { 0 } };
171 static const char *const kwlist[] =
172 { "pbits", "qbits", "event", "rng", "nsteps", 0 };
173 mp *v = MP_NEW;
174 PyObject *rc = 0;
175
176 evt.exc = &exc;
177 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&O&:genkcdsa", KWLIST,
178 convuint, &pl, convuint, &ql,
179 convpgev, &evt, convgrand, &r,
180 convuint, &steps))
181 goto end;
182 if (dh_kcdsagen(&dp, ql, pl, 0, steps, r, evt.ev.proc, evt.ev.ctx))
183 PGENERR(&exc);
184 mp_div(&v, 0, dp.p, dp.q);
185 v = mp_lsr(v, v, 1);
186 rc = Py_BuildValue("(NN)", fginfo_pywrap(&dp, dhinfo_pytype),
187 mp_pywrap(v));
188 end:
189 droppgev(&evt);
190 return (rc);
191 }
192
193 static PyObject *dimeth_gendsa(PyObject *me, PyObject *arg, PyObject *kw)
194 {
195 dsa_param dp;
196 unsigned ql, pl;
197 unsigned steps = 0;
198 dsa_seed ds;
199 struct bin k;
200 struct excinfo exc = EXCINFO_INIT;
201 pypgev evt = { { 0 } };
202 static const char *const kwlist[] =
203 { "pbits", "qbits", "seed", "event", "nsteps", 0 };
204 PyObject *rc = 0;
205
206 evt.exc = &exc;
207 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&O&|O&O&:gendsa", KWLIST,
208 convuint, &pl, convuint, &ql,
209 convbin, &k,
210 convpgev, &evt, convuint, &steps))
211 goto end;
212 if (dsa_gen(&dp, ql, pl, steps, k.p, k.sz, &ds, evt.ev.proc, evt.ev.ctx))
213 PGENERR(&exc);
214 rc = Py_BuildValue("(NNl)", fginfo_pywrap(&dp, dhinfo_pytype),
215 bytestring_pywrap(ds.p, ds.sz), (long)ds.count);
216 xfree(ds.p);
217 end:
218 droppgev(&evt);
219 return (rc);
220 }
221
222 static PyObject *meth__parse(PyObject *me, PyObject *arg, PyTypeObject *ty,
223 int (*parse)(qd_parse *, gprime_param *))
224 {
225 qd_parse qd;
226 char *p;
227 gprime_param gp;
228 PyObject *rc = 0;
229
230 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
231 qd.p = p; qd.e = 0;
232 if (parse(&qd, &gp)) VALERR(qd.e);
233 rc = fginfo_pywrap(&gp, ty);
234 end:
235 return (rc);
236 }
237
238 static PyObject *dimeth_parse(PyObject *me, PyObject *arg)
239 { return (meth__parse(me, arg, dhinfo_pytype, dh_parse)); }
240
241 static PyObject *bimeth_parse(PyObject *me, PyObject *arg)
242 { return (meth__parse(me, arg, bindhinfo_pytype, dhbin_parse)); }
243
244 static const PyGetSetDef fginfo_pygetset[] = {
245 #define GETSETNAME(op, name) fi##op##_##name
246 GET (r, "I.r -> group order")
247 #undef GETSETNAME
248 { 0 }
249 };
250
251 static const PyGetSetDef dhinfo_pygetset[] = {
252 #define GETSETNAME(op, name) di##op##_##name
253 GET (p, "I.p -> prime")
254 GET (g, "I.g -> generator")
255 #undef GETSETNAME
256 { 0 }
257 };
258
259 static const PyMethodDef dhinfo_pymethods[] = {
260 #define METHNAME(name) dimeth_##name
261 SMTH (parse, "parse(STR) -> D, REST")
262 KWSMTH(generate,
263 "generate(PBITS, [qbits = 0], [event = pgen_nullev],\n"
264 " [rng = rand], [nsteps = 0]) -> D")
265 KWSMTH(genlimlee,
266 "genlimlee(PBITS, QBITS, [event = pgen_nullev], "
267 "[ievent = pgen_nullev],\n"
268 " [rng = rand], [nsteps = 0], [subgroupp = True]) "
269 "-> (D, [Q, ...])")
270 KWSMTH(gendsa,
271 "gendsa(PBITS, QBITS, SEED, [event = pgen_nullev], [nsteps = 0])\n"
272 " -> (D, SEED, COUNT)")
273 KWSMTH(genkcdsa,
274 "gendsa(PBITS, QBITS, [event = pgen_nullev], "
275 "[rng = rand], [nsteps = 0])\n"
276 " -> (D, V)")
277 #undef METHNAME
278 { 0 }
279 };
280
281 static const PyGetSetDef bindhinfo_pygetset[] = {
282 #define GETSETNAME(op, name) bi##op##_##name
283 GET (p, "I.p -> irreducible polynomial")
284 GET (m, "I.m -> degree of polynomial")
285 GET (g, "I.g -> generator")
286 #undef GETSETNAME
287 { 0 }
288 };
289
290 static const PyMethodDef bindhinfo_pymethods[] = {
291 #define METHNAME(name) bimeth_##name
292 SMTH (parse, "parse(STR) -> D, REST")
293 #undef METHNAME
294 { 0 }
295 };
296
297 static const PyTypeObject fginfo_pytype_skel = {
298 PyVarObject_HEAD_INIT(0, 0) /* Header */
299 "FGInfo", /* @tp_name@ */
300 sizeof(fginfo_pyobj), /* @tp_basicsize@ */
301 0, /* @tp_itemsize@ */
302
303 fginfo_pydealloc, /* @tp_dealloc@ */
304 0, /* @tp_print@ */
305 0, /* @tp_getattr@ */
306 0, /* @tp_setattr@ */
307 0, /* @tp_compare@ */
308 0, /* @tp_repr@ */
309 0, /* @tp_as_number@ */
310 0, /* @tp_as_sequence@ */
311 0, /* @tp_as_mapping@ */
312 0, /* @tp_hash@ */
313 0, /* @tp_call@ */
314 0, /* @tp_str@ */
315 0, /* @tp_getattro@ */
316 0, /* @tp_setattro@ */
317 0, /* @tp_as_buffer@ */
318 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
319 Py_TPFLAGS_BASETYPE,
320
321 /* @tp_doc@ */
322 "Abstract base class for field-group information objects.",
323
324 0, /* @tp_traverse@ */
325 0, /* @tp_clear@ */
326 0, /* @tp_richcompare@ */
327 0, /* @tp_weaklistoffset@ */
328 0, /* @tp_iter@ */
329 0, /* @tp_iternext@ */
330 0, /* @tp_methods@ */
331 0, /* @tp_members@ */
332 PYGETSET(fginfo), /* @tp_getset@ */
333 0, /* @tp_base@ */
334 0, /* @tp_dict@ */
335 0, /* @tp_descr_get@ */
336 0, /* @tp_descr_set@ */
337 0, /* @tp_dictoffset@ */
338 0, /* @tp_init@ */
339 PyType_GenericAlloc, /* @tp_alloc@ */
340 abstract_pynew, /* @tp_new@ */
341 0, /* @tp_free@ */
342 0 /* @tp_is_gc@ */
343 };
344
345 static const PyTypeObject dhinfo_pytype_skel = {
346 PyVarObject_HEAD_INIT(0, 0) /* Header */
347 "DHInfo", /* @tp_name@ */
348 sizeof(fginfo_pyobj), /* @tp_basicsize@ */
349 0, /* @tp_itemsize@ */
350
351 fginfo_pydealloc, /* @tp_dealloc@ */
352 0, /* @tp_print@ */
353 0, /* @tp_getattr@ */
354 0, /* @tp_setattr@ */
355 0, /* @tp_compare@ */
356 0, /* @tp_repr@ */
357 0, /* @tp_as_number@ */
358 0, /* @tp_as_sequence@ */
359 0, /* @tp_as_mapping@ */
360 0, /* @tp_hash@ */
361 0, /* @tp_call@ */
362 0, /* @tp_str@ */
363 0, /* @tp_getattro@ */
364 0, /* @tp_setattro@ */
365 0, /* @tp_as_buffer@ */
366 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
367 Py_TPFLAGS_BASETYPE,
368
369 /* @tp_doc@ */
370 "DHInfo(P, R, G): standard (integer) Diffie-Hellman group information.",
371
372 0, /* @tp_traverse@ */
373 0, /* @tp_clear@ */
374 0, /* @tp_richcompare@ */
375 0, /* @tp_weaklistoffset@ */
376 0, /* @tp_iter@ */
377 0, /* @tp_iternext@ */
378 PYMETHODS(dhinfo), /* @tp_methods@ */
379 0, /* @tp_members@ */
380 PYGETSET(dhinfo), /* @tp_getset@ */
381 0, /* @tp_base@ */
382 0, /* @tp_dict@ */
383 0, /* @tp_descr_get@ */
384 0, /* @tp_descr_set@ */
385 0, /* @tp_dictoffset@ */
386 0, /* @tp_init@ */
387 PyType_GenericAlloc, /* @tp_alloc@ */
388 fginfo_pynew, /* @tp_new@ */
389 0, /* @tp_free@ */
390 0 /* @tp_is_gc@ */
391 };
392
393 static const PyTypeObject bindhinfo_pytype_skel = {
394 PyVarObject_HEAD_INIT(0, 0) /* Header */
395 "BinDHInfo", /* @tp_name@ */
396 sizeof(fginfo_pyobj), /* @tp_basicsize@ */
397 0, /* @tp_itemsize@ */
398
399 fginfo_pydealloc, /* @tp_dealloc@ */
400 0, /* @tp_print@ */
401 0, /* @tp_getattr@ */
402 0, /* @tp_setattr@ */
403 0, /* @tp_compare@ */
404 0, /* @tp_repr@ */
405 0, /* @tp_as_number@ */
406 0, /* @tp_as_sequence@ */
407 0, /* @tp_as_mapping@ */
408 0, /* @tp_hash@ */
409 0, /* @tp_call@ */
410 0, /* @tp_str@ */
411 0, /* @tp_getattro@ */
412 0, /* @tp_setattro@ */
413 0, /* @tp_as_buffer@ */
414 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
415 Py_TPFLAGS_BASETYPE,
416
417 /* @tp_doc@ */
418 "BinDHInfo(P, R, G): binary-field Diffie-Hellman group information.",
419
420 0, /* @tp_traverse@ */
421 0, /* @tp_clear@ */
422 0, /* @tp_richcompare@ */
423 0, /* @tp_weaklistoffset@ */
424 0, /* @tp_iter@ */
425 0, /* @tp_iternext@ */
426 PYMETHODS(bindhinfo), /* @tp_methods@ */
427 0, /* @tp_members@ */
428 PYGETSET(bindhinfo), /* @tp_getset@ */
429 0, /* @tp_base@ */
430 0, /* @tp_dict@ */
431 0, /* @tp_descr_get@ */
432 0, /* @tp_descr_set@ */
433 0, /* @tp_dictoffset@ */
434 0, /* @tp_init@ */
435 PyType_GenericAlloc, /* @tp_alloc@ */
436 fginfo_pynew, /* @tp_new@ */
437 0, /* @tp_free@ */
438 0 /* @tp_is_gc@ */
439 };
440
441 /*----- General utilities -------------------------------------------------*/
442
443 PyTypeObject *ge_pytype, *group_pytype;
444 static PyTypeObject *primegroup_pytype, *bingroup_pytype, *ecgroup_pytype;
445
446 group *group_copy(group *g)
447 {
448 if (STRCMP(G_NAME(g), ==, "prime")) {
449 gctx_prime *gc = (gctx_prime *)g;
450 gprime_param gp;
451 gp.g = G_TOINT(g, MP_NEW, g->g);
452 gp.p = gc->mm.m;
453 gp.q = gc->g.r;
454 g = group_prime(&gp);
455 MP_DROP(gp.g);
456 } else if (STRCMP(G_NAME(g), ==, "bin")) {
457 gctx_bin *gc = (gctx_bin *)g;
458 gbin_param gb;
459 gb.g = G_TOINT(g, MP_NEW, g->g);
460 gb.p = gc->r.p;
461 gb.q = gc->g.r;
462 g = group_binary(&gb);
463 MP_DROP(gb.g);
464 } else if (STRCMP(G_NAME(g), ==, "ec")) {
465 gctx_ec *gc = (gctx_ec *)g;
466 ec_info ei;
467 if ((ei.c = eccurve_copy(gc->ei.c)) == 0)
468 return (0);
469 EC_CREATE(&ei.g);
470 EC_COPY(&ei.g, &gc->ei.g);
471 ei.r = MP_COPY(gc->ei.r);
472 ei.h = MP_COPY(gc->ei.h);
473 g = group_ec(&ei);
474 } else
475 g = 0;
476 return (g);
477 }
478
479 PyObject *ge_pywrap(PyObject *gobj, ge *x)
480 {
481 ge_pyobj *z = PyObject_New(ge_pyobj, (PyTypeObject *)gobj);
482 z->x = x;
483 z->g = GROUP_G(gobj);
484 Py_INCREF(gobj);
485 return ((PyObject *)z);
486 }
487
488 static PyObject *ge_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
489 {
490 static const char *const kwlist[] = { "x", 0 };
491 PyObject *x;
492 group *g;
493 ec p = EC_INIT;
494 mp *y = 0;
495 ge *xx = 0;
496 size_t n;
497 mptext_stringctx sc;
498
499 g = GROUP_G(ty);
500 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O:new", KWLIST, &x)) goto end;
501 xx = G_CREATE(g);
502 if (ECPT_PYCHECK(x)) {
503 getecptout(&p, x);
504 if (G_FROMEC(g, xx, &p))
505 TYERR("can't convert from elliptic curve point");
506 EC_DESTROY(&p);
507 } else if ((y = tomp(x)) != 0) {
508 if (G_FROMINT(g, xx, y))
509 TYERR("can't convert from integer");
510 MP_DROP(y);
511 } else if (TEXT_CHECK(x)) {
512 TEXT_PTRLEN(x, sc.buf, n); sc.lim = sc.buf + n;
513 if (G_READ(g, xx, &mptext_stringops, &sc) || sc.buf < sc.lim)
514 VALERR("malformed group element string");
515 } else
516 TYERR("can't convert to group element");
517 return (ge_pywrap((PyObject *)ty, xx));
518 end:
519 mp_drop(y);
520 EC_DESTROY(&p);
521 if (xx) G_DESTROY(g, xx);
522 return (0);
523 }
524
525 static PyObject *group_dopywrap(PyTypeObject *ty, group *g)
526 {
527 group_pyobj *gobj = newtype(ty, 0, g->ops->name);
528 gobj->g = g;
529 gobj->ty.ht_type.tp_basicsize = sizeof(ge_pyobj);
530 gobj->ty.ht_type.tp_base = ge_pytype;
531 Py_INCREF(group_pytype);
532 gobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
533 Py_TPFLAGS_BASETYPE |
534 Py_TPFLAGS_CHECKTYPES |
535 Py_TPFLAGS_HEAPTYPE);
536 gobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
537 gobj->ty.ht_type.tp_free = 0;
538 gobj->ty.ht_type.tp_new = ge_pynew;
539 typeready(&gobj->ty.ht_type);
540 return ((PyObject *)gobj);
541 }
542
543 PyObject *group_pywrap(group *g)
544 {
545 PyTypeObject *ty;
546
547 if (STRCMP(G_NAME(g), ==, "prime")) ty = primegroup_pytype;
548 else if (STRCMP(G_NAME(g), ==, "bin")) ty = bingroup_pytype;
549 else if (STRCMP(G_NAME(g), ==, "ec")) ty = ecgroup_pytype;
550 else abort();
551 return (group_dopywrap(ty, g));
552 }
553
554 /*----- Group elements ----------------------------------------------------*/
555
556 #define BINOP(name) \
557 static PyObject *ge_py##name(PyObject *x, PyObject *y) \
558 { \
559 ge *z; \
560 group *g; \
561 if (!GE_PYCHECK(x) || !GE_PYCHECK(y) || \
562 (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y)))) \
563 RETURN_NOTIMPL; \
564 g = GE_G(x); \
565 z = G_CREATE(g); \
566 g->ops->name(g, z, GE_X(x), GE_X(y)); \
567 return (ge_pywrap(GE_GOBJ(x), z)); \
568 }
569 BINOP(mul)
570 BINOP(div)
571 #undef BINOP
572
573 #define UNOP(name) \
574 static PyObject *gemeth_##name(PyObject *me) \
575 { \
576 group *g; \
577 ge *z; \
578 g = GE_G(me); \
579 z = G_CREATE(g); \
580 g->ops->name(g, z, GE_X(me)); \
581 return (ge_pywrap(GE_GOBJ(me), z)); \
582 }
583 UNOP(sqr)
584 UNOP(inv)
585 #undef UNOP
586
587 static PyObject *ge_pyexp(PyObject *x, PyObject *n, PyObject *m)
588 {
589 mp *nn;
590 ge *z;
591
592 if (m != Py_None || !GE_PYCHECK(x) || (nn = implicitmp(n)) == 0)
593 RETURN_NOTIMPL;
594 z = G_CREATE(GE_G(x));
595 G_EXP(GE_G(x), z, GE_X(x), nn);
596 MP_DROP(nn);
597 return (ge_pywrap(GE_GOBJ(x), z));
598 }
599
600 static void ge_pydealloc(PyObject *me)
601 {
602 G_DESTROY(GE_G(me), GE_X(me));
603 Py_DECREF(GE_GOBJ(me));
604 FREEOBJ(me);
605 }
606
607 static void group_pydealloc(PyObject *me)
608 {
609 G_DESTROYGROUP(GROUP_G(me));
610 PyType_Type.tp_dealloc(me);
611 }
612
613 static PyObject *gmexp_id(PyObject *me)
614 {
615 group *g = GROUP_G(me); ge *x = G_CREATE(g);
616 G_COPY(g, x, g->i); return (ge_pywrap(me, x));
617 }
618
619 static int gmexp_fill(void *pp, PyObject *me, PyObject *x, PyObject *m)
620 {
621 group_expfactor *f = pp;
622
623 if (!GE_PYCHECK(x) || GE_G(x) != GROUP_G(me) || (f->exp = getmp(m)) == 0)
624 return (-1);
625 f->base = GE_X(x);
626 return (0);
627 }
628
629 static PyObject *ge_pyrichcompare(PyObject *x, PyObject *y, int op)
630 {
631 int b;
632 PyObject *rc = 0;
633
634 if (!GE_PYCHECK(x) || !GE_PYCHECK(y) ||
635 (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y))))
636 RETURN_NOTIMPL;
637 switch (op) {
638 case Py_EQ: b = G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
639 case Py_NE: b = !G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
640 default: TYERR("group elements are unordered");
641 }
642 rc = getbool(b);
643 end:
644 return (rc);
645 }
646
647 static PyObject *gemeth_check(PyObject *me)
648 {
649 if (group_check(GE_G(me), GE_X(me))) VALERR("bad group element");
650 RETURN_OBJ(me);
651 end:
652 return (0);
653 }
654
655 static int ge_pynonzerop(PyObject *x)
656 { return (!G_IDENTP(GE_G(x), GE_X(x))); }
657
658 static PyObject *ge_pystr(PyObject *me)
659 {
660 dstr d = DSTR_INIT;
661 PyObject *rc;
662
663 group_writedstr(GE_G(me), GE_X(me), &d);
664 rc = TEXT_FROMSTRLEN(d.buf, d.len);
665 DDESTROY(&d);
666 return (rc);
667 }
668
669 #ifdef PY2
670 static PyObject *ge_pylong(PyObject *me)
671 {
672 mp *x = 0;
673 PyObject *rc = 0;
674
675 if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
676 TYERR("can't convert to integer");
677 rc = mp_topylong(x);
678 end:
679 mp_drop(x);
680 return (rc);
681 }
682 #endif
683
684 static PyObject *ge_pyint(PyObject *me)
685 {
686 mp *x = 0;
687 PyObject *rc = 0;
688 long l;
689
690 if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
691 TYERR("can't convert to integer");
692 if (!mp_tolong_checked(x, &l, 0)) rc = PyInt_FromLong(l);
693 else rc = mp_topylong(x);
694 end:
695 mp_drop(x);
696 return (rc);
697 }
698
699 static PyObject *gemeth_toint(PyObject *me)
700 {
701 mp *x;
702
703 if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
704 TYERR("can't convert to integer");
705 return (mp_pywrap(x));
706 end:
707 return (0);
708 }
709
710 static PyObject *gemeth_toec(PyObject *me, PyObject *arg, PyObject *kw)
711 {
712 static const char *const kwlist[] = { "curve", 0 };
713 PyTypeObject *cty = 0;
714 PyObject *rc = 0;
715 group *g;
716 ec_curve *c;
717 ec p = EC_INIT;
718
719 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:toec", KWLIST,
720 &cty)) goto end;
721 g = GROUP_G(GE_GOBJ(me));
722 if (cty) {
723 if (!PyType_Check(cty) || !PyType_IsSubtype(cty, ecpt_pytype))
724 TYERR("want subtype of catacomb.ECPt");
725 Py_INCREF((PyObject *)cty);
726 } else if (STRCMP(G_NAME(g), ==, "ec")) {
727 c = eccurve_copy(((gctx_ec *)g)->ei.c);
728 cty = (PyTypeObject *)eccurve_pywrap(0, c);
729 } else {
730 cty = ecpt_pytype;
731 Py_INCREF((PyObject *)cty);
732 }
733 if (G_TOEC(GE_G(me), &p, GE_X(me))) {
734 Py_DECREF((PyObject *)cty);
735 TYERR("can't convert to ec point");
736 }
737 rc = ecpt_pywrapout(cty, &p);
738 Py_DECREF((PyObject *)cty);
739 end:
740 return (rc);
741 }
742
743 static PyObject *gemeth_tobuf(PyObject *me)
744 {
745 buf b;
746 PyObject *rc;
747 size_t n;
748
749 n = GE_G(me)->noctets + 4;
750 rc = bytestring_pywrap(0, n);
751 buf_init(&b, BIN_PTR(rc), n);
752 G_TOBUF(GE_G(me), &b, GE_X(me));
753 assert(BOK(&b));
754 BIN_SETLEN(rc, BLEN(&b));
755 return (rc);
756 }
757
758 static PyObject *gemeth_toraw(PyObject *me)
759 {
760 buf b;
761 PyObject *rc;
762 size_t n;
763
764 n = GE_G(me)->noctets;
765 rc = bytestring_pywrap(0, n);
766 buf_init(&b, BIN_PTR(rc), n);
767 G_TORAW(GE_G(me), &b, GE_X(me));
768 assert(BOK(&b));
769 BIN_SETLEN(rc, BLEN(&b));
770 return (rc);
771 }
772
773 static PyObject *gmexp_exp(PyObject *me, void *pp, int n)
774 {
775 ge *z = G_CREATE(GROUP_G(me));
776 G_MEXP(GROUP_G(me), z, pp, n);
777 return (ge_pywrap(me, z));
778 }
779
780 static void gmexp_drop(void *pp)
781 {
782 group_expfactor *f = pp;
783 MP_DROP(f->exp);
784 }
785
786 static PyObject *gmeth_mexp(PyObject *me, PyObject *arg)
787 {
788 return (mexp_common(me, arg, sizeof(group_expfactor),
789 gmexp_id, gmexp_fill, gmexp_exp, gmexp_drop));
790 }
791
792 static PyObject *gmeth_checkgroup(PyObject *me, PyObject *arg, PyObject *kw)
793 {
794 static const char *const kwlist[] = { "rng", 0 };
795 grand *r = &rand_global;
796 const char *p;
797
798 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:checkgroup", KWLIST,
799 convgrand, &r))
800 goto end;
801 if ((p = G_CHECK(GROUP_G(me), r)) != 0)
802 VALERR(p);
803 RETURN_OBJ(me);
804 end:
805 return (0);
806 }
807
808 static PyObject *group_pyrichcompare(PyObject *x, PyObject *y, int op)
809 {
810 int b = group_samep(GROUP_G(x), GROUP_G(y));
811 switch (op) {
812 case Py_EQ: break;
813 case Py_NE: b = !b;
814 default: TYERR("can't order groups");
815 }
816 return (getbool(b));
817 end:
818 return (0);
819 }
820
821 static PyObject *gemeth_frombuf(PyObject *me, PyObject *arg)
822 {
823 buf b;
824 struct bin in;
825 group *g;
826 ge *x = 0;
827
828 if (!PyArg_ParseTuple(arg, "O&:frombuf", convbin, &in)) return (0);
829 g = GROUP_G(me);
830 buf_init(&b, (/*unconst*/ void *)in.p, in.sz);
831 x = G_CREATE(g);
832 if (G_FROMBUF(g, &b, x)) VALERR("invalid data");
833 return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
834 end:
835 if (x) G_DESTROY(g, x);
836 return (0);
837 }
838
839 static PyObject *gemeth_fromraw(PyObject *me, PyObject *arg)
840 {
841 buf b;
842 struct bin in;
843 group *g;
844 ge *x = 0;
845
846 if (!PyArg_ParseTuple(arg, "O&:fromraw", convbin, &in)) return (0);
847 g = GROUP_G(me);
848 buf_init(&b, (/*unconst*/ void *)in.p, in.sz);
849 x = G_CREATE(g);
850 if (G_FROMRAW(g, &b, x)) VALERR("invalid data");
851 return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
852 end:
853 if (x) G_DESTROY(g, x);
854 return (0);
855 }
856
857 static PyObject *gemeth_fromstring(PyObject *me, PyObject *arg)
858 {
859 mptext_stringctx sc;
860 char *p;
861 Py_ssize_t n;
862 group *g;
863 ge *x = 0;
864
865 if (!PyArg_ParseTuple(arg, "s#:fromstring", &p, &n)) return (0);
866 sc.buf = p;
867 sc.lim = sc.buf + n;
868 g = GROUP_G(me);
869 x = G_CREATE(g);
870 if (G_READ(g, x, &mptext_stringops, &sc))
871 VALERR("bad group element string");
872 return (Py_BuildValue("(Ns#)", ge_pywrap(me, x),
873 sc.buf, (Py_ssize_t)(sc.lim - sc.buf)));
874 end:
875 if (x) G_DESTROY(g, x);
876 return (0);
877 }
878
879 static PyObject *gmeth_parse(PyObject *me, PyObject *arg)
880 {
881 char *p;
882 qd_parse qd;
883 group *g;
884
885 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
886 qd.p = p; qd.e = 0;
887 if ((g = group_parse(&qd)) == 0) VALERR(qd.e);
888 return (group_pywrap(g));
889 end:
890 return (0);
891 }
892
893 static PyObject *geget_group(PyObject *me, void *hunoz)
894 { RETURN_OBJ(GE_GOBJ(me)); }
895
896 static PyObject *gget_nbits(PyObject *me, void *hunoz)
897 { return (PyInt_FromLong(GROUP_G(me)->nbits)); }
898
899 static PyObject *gget_noctets(PyObject *me, void *hunoz)
900 { return (PyInt_FromLong(GROUP_G(me)->noctets)); }
901
902 static PyObject *gget_i(PyObject *me, void *hunoz)
903 {
904 group *g = GROUP_G(me); ge *x = G_CREATE(g);
905 G_COPY(g, x, g->i); return (ge_pywrap(me, x));
906 }
907
908 static PyObject *gget_g(PyObject *me, void *hunoz)
909 {
910 group *g = GROUP_G(me); ge *x = G_CREATE(g);
911 G_COPY(g, x, g->g); return (ge_pywrap(me, x));
912 }
913
914 static Py_hash_t ge_pyhash(PyObject *me)
915 {
916 buf b;
917 size_t sz = GE_G(me)->noctets + 4;
918 uint32 h = 0xf672c776 + GE_G(me)->ops->ty;
919 octet *p = xmalloc(sz);
920 buf_init(&b, p, sz);
921 G_TOBUF(GE_G(me), &b, GE_X(me));
922 assert(BOK(&b));
923 h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
924 xfree(p);
925 return (h % LONG_MAX);
926 }
927
928 static PyObject *gget_r(PyObject *me, void *hunoz)
929 { return (mp_pywrap(MP_COPY(GROUP_G(me)->r))); }
930
931 static PyObject *gget_h(PyObject *me, void *hunoz)
932 { return (mp_pywrap(MP_COPY(GROUP_G(me)->h))); }
933
934 static const PyGetSetDef ge_pygetset[] = {
935 #define GETSETNAME(op, name) ge##op##_##name
936 GET (group, "X.group -> group containing X")
937 #undef GETSETNAME
938 { 0 }
939 };
940
941 static const PyMethodDef ge_pymethods[] = {
942 #define METHNAME(name) gemeth_##name
943 NAMETH(inv, "X.inv() -> inverse element of X")
944 NAMETH(sqr, "X.sqr() -> X^2 = X * X")
945 NAMETH(check, "X.check() -> check X really belongs to its group")
946 NAMETH(toint, "X.toint() -> X converted to an integer")
947 KWMETH(toec, "X.toec([curve = ECPt]) -> "
948 "X converted to elliptic curve point")
949 NAMETH(tobuf, "X.tobuf() -> X in buffer representation")
950 NAMETH(toraw, "X.toraw() -> X in raw representation")
951 CMTH (frombuf, "frombuf(BUF) -> X, REST")
952 CMTH (fromraw, "fromraw(BUF) -> X, REST")
953 CMTH (fromstring, "fromstring(STR) -> X, REST")
954 #undef METHNAME
955 { 0 }
956 };
957
958 static const PyNumberMethods ge_pynumber = {
959 0, /* @nb_add@ */
960 0, /* @nb_subtract@ */
961 ge_pymul, /* @nb_multiply@ */
962 #ifdef PY2
963 ge_pydiv, /* @nb_divide@ */
964 #endif
965 0, /* @nb_remainder@ */
966 0, /* @nb_divmod@ */
967 ge_pyexp, /* @nb_power@ */
968 0, /* @nb_negative@ */
969 0, /* @nb_positive@ */
970 0, /* @nb_absolute@ */
971 ge_pynonzerop, /* @nb_nonzero@ */
972 0, /* @nb_invert@ */
973 0, /* @nb_lshift@ */
974 0, /* @nb_rshift@ */
975 0, /* @nb_and@ */
976 0, /* @nb_xor@ */
977 0, /* @nb_or@ */
978 #ifdef PY2
979 0, /* @nb_coerce@ */
980 #endif
981 ge_pyint, /* @nb_int@ */
982 PY23(ge_pylong, 0), /* @nb_long@ */
983 0 /* meaningless */, /* @nb_float@ */
984 #ifdef PY2
985 0, /* @nb_oct@ */
986 0, /* @nb_hex@ */
987 #endif
988
989 0, /* @nb_inplace_add@ */
990 0, /* @nb_inplace_subtract@ */
991 0, /* @nb_inplace_multiply@ */
992 #ifdef PY2
993 0, /* @nb_inplace_divide@ */
994 #endif
995 0, /* @nb_inplace_remainder@ */
996 0, /* @nb_inplace_power@ */
997 0, /* @nb_inplace_lshift@ */
998 0, /* @nb_inplace_rshift@ */
999 0, /* @nb_inplace_and@ */
1000 0, /* @nb_inplace_xor@ */
1001 0, /* @nb_inplace_or@ */
1002
1003 0, /* @nb_floor_divide@ */
1004 ge_pydiv, /* @nb_true_divide@ */
1005 0, /* @nb_inplace_floor_divide@ */
1006 0, /* @nb_inplace_true_divide@ */
1007 };
1008
1009 static const PyTypeObject ge_pytype_skel = {
1010 PyVarObject_HEAD_INIT(0, 0) /* Header */
1011 "GE", /* @tp_name@ */
1012 sizeof(ge_pyobj), /* @tp_basicsize@ */
1013 0, /* @tp_itemsize@ */
1014
1015 ge_pydealloc, /* @tp_dealloc@ */
1016 0, /* @tp_print@ */
1017 0, /* @tp_getattr@ */
1018 0, /* @tp_setattr@ */
1019 0, /* @tp_compare@ */
1020 0, /* @tp_repr@ */
1021 PYNUMBER(ge), /* @tp_as_number@ */
1022 0, /* @tp_as_sequence@ */
1023 0, /* @tp_as_mapping@ */
1024 ge_pyhash, /* @tp_hash@ */
1025 0, /* @tp_call@ */
1026 ge_pystr, /* @tp_str@ */
1027 0, /* @tp_getattro@ */
1028 0, /* @tp_setattro@ */
1029 0, /* @tp_as_buffer@ */
1030 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1031 Py_TPFLAGS_CHECKTYPES |
1032 Py_TPFLAGS_BASETYPE,
1033
1034 /* @tp_doc@ */
1035 "Group elements, abstract base class.",
1036
1037 0, /* @tp_traverse@ */
1038 0, /* @tp_clear@ */
1039 ge_pyrichcompare, /* @tp_richcompare@ */
1040 0, /* @tp_weaklistoffset@ */
1041 0, /* @tp_iter@ */
1042 0, /* @tp_iternext@ */
1043 PYMETHODS(ge), /* @tp_methods@ */
1044 0, /* @tp_members@ */
1045 PYGETSET(ge), /* @tp_getset@ */
1046 0, /* @tp_base@ */
1047 0, /* @tp_dict@ */
1048 0, /* @tp_descr_get@ */
1049 0, /* @tp_descr_set@ */
1050 0, /* @tp_dictoffset@ */
1051 0, /* @tp_init@ */
1052 PyType_GenericAlloc, /* @tp_alloc@ */
1053 abstract_pynew, /* @tp_new@ */
1054 0, /* @tp_free@ */
1055 0 /* @tp_is_gc@ */
1056 };
1057
1058 static const PyGetSetDef group_pygetset[] = {
1059 #define GETSETNAME(op, name) g##op##_##name
1060 GET (noctets, "G.noctets -> size in octets of element")
1061 GET (nbits, "G.nbits -> size in bits of element")
1062 GET (i, "G.i -> group identity")
1063 GET (g, "G.g -> group generator")
1064 GET (r, "G.r -> group order")
1065 GET (h, "G.h -> group cofactor")
1066 #undef GETSETNAME
1067 { 0 }
1068 };
1069
1070 static const PyMethodDef group_pymethods[] = {
1071 #define METHNAME(name) gmeth_##name
1072 METH (mexp, "G.mexp([(X0, N0), (X1, N1), ...]) -> X0^N0 X1^N1 ...")
1073 KWMETH(checkgroup, "G.checkgroup([rng = rand]): check group is good")
1074 SMTH (parse, "parse(STR) -> G, REST")
1075 #undef METHNAME
1076 { 0 }
1077 };
1078
1079 static const PyTypeObject group_pytype_skel = {
1080 PyVarObject_HEAD_INIT(0, 0) /* Header */
1081 "Group", /* @tp_name@ */
1082 sizeof(group_pyobj), /* @tp_basicsize@ */
1083 0, /* @tp_itemsize@ */
1084
1085 group_pydealloc, /* @tp_dealloc@ */
1086 0, /* @tp_print@ */
1087 0, /* @tp_getattr@ */
1088 0, /* @tp_setattr@ */
1089 0, /* @tp_compare@ */
1090 0, /* @tp_repr@ */
1091 0, /* @tp_as_number@ */
1092 0, /* @tp_as_sequence@ */
1093 0, /* @tp_as_mapping@ */
1094 0, /* @tp_hash@ */
1095 0, /* @tp_call@ */
1096 0, /* @tp_str@ */
1097 0, /* @tp_getattro@ */
1098 0, /* @tp_setattro@ */
1099 0, /* @tp_as_buffer@ */
1100 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1101 Py_TPFLAGS_BASETYPE,
1102
1103 /* @tp_doc@ */
1104 "Abstract base class for groups.",
1105
1106 0, /* @tp_traverse@ */
1107 0, /* @tp_clear@ */
1108 group_pyrichcompare, /* @tp_richcompare@ */
1109 0, /* @tp_weaklistoffset@ */
1110 0, /* @tp_iter@ */
1111 0, /* @tp_iternext@ */
1112 PYMETHODS(group), /* @tp_methods@ */
1113 0, /* @tp_members@ */
1114 PYGETSET(group), /* @tp_getset@ */
1115 0, /* @tp_base@ */
1116 0, /* @tp_dict@ */
1117 0, /* @tp_descr_get@ */
1118 0, /* @tp_descr_set@ */
1119 0, /* @tp_dictoffset@ */
1120 0, /* @tp_init@ */
1121 PyType_GenericAlloc, /* @tp_alloc@ */
1122 abstract_pynew, /* @tp_new@ */
1123 0, /* @tp_free@ */
1124 0 /* @tp_is_gc@ */
1125 };
1126
1127 static PyObject *pgget_info(PyObject *me, void *hunoz)
1128 {
1129 gprime_param dp;
1130 gctx_prime *gg = (gctx_prime *)GROUP_G(me);
1131 dp.p = MP_COPY(gg->mm.m);
1132 dp.q = MP_COPY(gg->g.r);
1133 dp.g = mpmont_reduce(&gg->mm, MP_NEW, gg->gen.x);
1134 return (fginfo_pywrap(&dp, dhinfo_pytype));
1135 }
1136
1137 static const PyGetSetDef primegroup_pygetset[] = {
1138 #define GETSETNAME(op, name) pg##op##_##name
1139 GET (info, "G.info -> information about the group")
1140 #undef GETSETNAME
1141 { 0 }
1142 };
1143
1144 static PyObject *primegroup_pynew(PyTypeObject *ty,
1145 PyObject *arg, PyObject *kw)
1146 {
1147 PyObject *i;
1148 static const char *const kwlist[] = { "info", 0 };
1149
1150 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1151 dhinfo_pytype, &i))
1152 return (0);
1153 return (group_dopywrap(ty, group_prime(FGINFO_DP(i))));
1154 }
1155
1156 static const PyTypeObject primegroup_pytype_skel = {
1157 PyVarObject_HEAD_INIT(0, 0) /* Header */
1158 "PrimeGroup", /* @tp_name@ */
1159 sizeof(group_pyobj), /* @tp_basicsize@ */
1160 0, /* @tp_itemsize@ */
1161
1162 group_pydealloc, /* @tp_dealloc@ */
1163 0, /* @tp_print@ */
1164 0, /* @tp_getattr@ */
1165 0, /* @tp_setattr@ */
1166 0, /* @tp_compare@ */
1167 0, /* @tp_repr@ */
1168 0, /* @tp_as_number@ */
1169 0, /* @tp_as_sequence@ */
1170 0, /* @tp_as_mapping@ */
1171 0, /* @tp_hash@ */
1172 0, /* @tp_call@ */
1173 0, /* @tp_str@ */
1174 0, /* @tp_getattro@ */
1175 0, /* @tp_setattro@ */
1176 0, /* @tp_as_buffer@ */
1177 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1178 Py_TPFLAGS_BASETYPE,
1179
1180 /* @tp_doc@ */
1181 "PrimeGroup(INFO): subgroups of prime fields.",
1182
1183 0, /* @tp_traverse@ */
1184 0, /* @tp_clear@ */
1185 0, /* @tp_richcompare@ */
1186 0, /* @tp_weaklistoffset@ */
1187 0, /* @tp_iter@ */
1188 0, /* @tp_iternext@ */
1189 0, /* @tp_methods@ */
1190 0, /* @tp_members@ */
1191 PYGETSET(primegroup), /* @tp_getset@ */
1192 0, /* @tp_base@ */
1193 0, /* @tp_dict@ */
1194 0, /* @tp_descr_get@ */
1195 0, /* @tp_descr_set@ */
1196 0, /* @tp_dictoffset@ */
1197 0, /* @tp_init@ */
1198 PyType_GenericAlloc, /* @tp_alloc@ */
1199 primegroup_pynew, /* @tp_new@ */
1200 0, /* @tp_free@ */
1201 0 /* @tp_is_gc@ */
1202 };
1203
1204 static PyObject *bgget_info(PyObject *me, void *hunoz)
1205 {
1206 gbin_param dp;
1207 gctx_bin *gg = (gctx_bin *)GROUP_G(me);
1208 dp.p = MP_COPY(gg->r.p);
1209 dp.q = MP_COPY(gg->g.r);
1210 dp.g = MP_COPY(gg->gen.x);
1211 return (fginfo_pywrap(&dp, bindhinfo_pytype));
1212 }
1213
1214 static const PyGetSetDef bingroup_pygetset[] = {
1215 #define GETSETNAME(op, name) bg##op##_##name
1216 GET (info, "G.info -> information about the group")
1217 #undef GETSETNAME
1218 { 0 }
1219 };
1220
1221 static PyObject *bingroup_pynew(PyTypeObject *ty,
1222 PyObject *arg, PyObject *kw)
1223 {
1224 PyObject *i;
1225 static const char *const kwlist[] = { "info", 0 };
1226
1227 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1228 bindhinfo_pytype, &i))
1229 return (0);
1230 return (group_dopywrap(ty, group_binary(FGINFO_DP(i))));
1231 }
1232
1233 static const PyTypeObject bingroup_pytype_skel = {
1234 PyVarObject_HEAD_INIT(0, 0) /* Header */
1235 "BinGroup", /* @tp_name@ */
1236 sizeof(group_pyobj), /* @tp_basicsize@ */
1237 0, /* @tp_itemsize@ */
1238
1239 group_pydealloc, /* @tp_dealloc@ */
1240 0, /* @tp_print@ */
1241 0, /* @tp_getattr@ */
1242 0, /* @tp_setattr@ */
1243 0, /* @tp_compare@ */
1244 0, /* @tp_repr@ */
1245 0, /* @tp_as_number@ */
1246 0, /* @tp_as_sequence@ */
1247 0, /* @tp_as_mapping@ */
1248 0, /* @tp_hash@ */
1249 0, /* @tp_call@ */
1250 0, /* @tp_str@ */
1251 0, /* @tp_getattro@ */
1252 0, /* @tp_setattro@ */
1253 0, /* @tp_as_buffer@ */
1254 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1255 Py_TPFLAGS_BASETYPE,
1256
1257 /* @tp_doc@ */
1258 "BinGroup(INFO): subgroups of binary fields.",
1259
1260 0, /* @tp_traverse@ */
1261 0, /* @tp_clear@ */
1262 0, /* @tp_richcompare@ */
1263 0, /* @tp_weaklistoffset@ */
1264 0, /* @tp_iter@ */
1265 0, /* @tp_iternext@ */
1266 0, /* @tp_methods@ */
1267 0, /* @tp_members@ */
1268 PYGETSET(bingroup), /* @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 bingroup_pynew, /* @tp_new@ */
1277 0, /* @tp_free@ */
1278 0 /* @tp_is_gc@ */
1279 };
1280
1281 static PyObject *egget_info(PyObject *me, void *hunoz)
1282 {
1283 ec_info ei;
1284 gctx_ec *gg = (gctx_ec *)GROUP_G(me);
1285
1286 ecinfo_copy(&ei, &gg->ei);
1287 return (ecinfo_pywrap(&ei));
1288 }
1289
1290 static const PyGetSetDef ecgroup_pygetset[] = {
1291 #define GETSETNAME(op, name) eg##op##_##name
1292 GET (info, "G.info -> information about the group")
1293 #undef GETSETNAME
1294 { 0 }
1295 };
1296
1297 static PyObject *ecgroup_pynew(PyTypeObject *ty,
1298 PyObject *arg, PyObject *kw)
1299 {
1300 PyObject *i;
1301 ec_info ei;
1302 static const char *const kwlist[] = { "info", 0 };
1303
1304 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1305 ecinfo_pytype, &i))
1306 return (0);
1307 ecinfo_copy(&ei, ECINFO_EI(i));
1308 return (group_dopywrap(ty, group_ec(&ei)));
1309 }
1310
1311 static const PyTypeObject ecgroup_pytype_skel = {
1312 PyVarObject_HEAD_INIT(0, 0) /* Header */
1313 "ECGroup", /* @tp_name@ */
1314 sizeof(group_pyobj), /* @tp_basicsize@ */
1315 0, /* @tp_itemsize@ */
1316
1317 group_pydealloc, /* @tp_dealloc@ */
1318 0, /* @tp_print@ */
1319 0, /* @tp_getattr@ */
1320 0, /* @tp_setattr@ */
1321 0, /* @tp_compare@ */
1322 0, /* @tp_repr@ */
1323 0, /* @tp_as_number@ */
1324 0, /* @tp_as_sequence@ */
1325 0, /* @tp_as_mapping@ */
1326 0, /* @tp_hash@ */
1327 0, /* @tp_call@ */
1328 0, /* @tp_str@ */
1329 0, /* @tp_getattro@ */
1330 0, /* @tp_setattro@ */
1331 0, /* @tp_as_buffer@ */
1332 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1333 Py_TPFLAGS_BASETYPE,
1334
1335 /* @tp_doc@ */
1336 "ECGroup(INFO): elliptic curve groups.",
1337
1338 0, /* @tp_traverse@ */
1339 0, /* @tp_clear@ */
1340 0, /* @tp_richcompare@ */
1341 0, /* @tp_weaklistoffset@ */
1342 0, /* @tp_iter@ */
1343 0, /* @tp_iternext@ */
1344 0, /* @tp_methods@ */
1345 0, /* @tp_members@ */
1346 PYGETSET(ecgroup), /* @tp_getset@ */
1347 0, /* @tp_base@ */
1348 0, /* @tp_dict@ */
1349 0, /* @tp_descr_get@ */
1350 0, /* @tp_descr_set@ */
1351 0, /* @tp_dictoffset@ */
1352 0, /* @tp_init@ */
1353 PyType_GenericAlloc, /* @tp_alloc@ */
1354 ecgroup_pynew, /* @tp_new@ */
1355 0, /* @tp_free@ */
1356 0 /* @tp_is_gc@ */
1357 };
1358
1359 /*----- Global stuff ------------------------------------------------------*/
1360
1361 void group_pyinit(void)
1362 {
1363 INITTYPE(fginfo, root);
1364 INITTYPE(dhinfo, fginfo);
1365 INITTYPE(bindhinfo, dhinfo);
1366 INITTYPE(ge, root);
1367 INITTYPE(group, type);
1368 INITTYPE(primegroup, group);
1369 INITTYPE(bingroup, group);
1370 INITTYPE(ecgroup, group);
1371 }
1372
1373 static const char *grp_namefn(const void *p)
1374 { const pentry *pt = p; return (pt->name); }
1375
1376 static int grp_ixfn(const pentry *tab, const pentry *pt)
1377 {
1378 int i;
1379
1380 for (i = 0; tab[i].name; i++)
1381 if (tab[i].data == pt->data) return (i);
1382 return (-1);
1383 }
1384 static int pgrp_ixfn(const void *p) { return (grp_ixfn(ptab, p)); }
1385 static int bgrp_ixfn(const void *p) { return (grp_ixfn(bintab, p)); }
1386
1387 static PyObject *grp_valfn(const pentry *tab, PyTypeObject *ty, int i)
1388 {
1389 gprime_param gp;
1390
1391 dh_infofromdata(&gp, tab[i].data);
1392 return (fginfo_pywrap(&gp, ty));
1393 }
1394 static PyObject *pgrp_valfn(int i)
1395 { return (grp_valfn(ptab, dhinfo_pytype, i)); }
1396 static PyObject *bgrp_valfn(int i)
1397 { return (grp_valfn(bintab, bindhinfo_pytype, i)); }
1398
1399 void group_pyinsert(PyObject *mod)
1400 {
1401 INSERT("FGInfo", fginfo_pytype);
1402 INSERT("DHInfo", dhinfo_pytype);
1403 INSERT("BinDHInfo", bindhinfo_pytype);
1404 INSERT("GE", ge_pytype);
1405 INSERT("Group", group_pytype);
1406 INSERT("PrimeGroup", primegroup_pytype);
1407 INSERT("BinGroup", bingroup_pytype);
1408 INSERT("ECGroup", ecgroup_pytype);
1409 INSERT("primegroups", make_grouptab(ptab, sizeof(*ptab),
1410 grp_namefn, pgrp_ixfn, pgrp_valfn));
1411 INSERT("bingroups", make_grouptab(bintab, sizeof(*bintab),
1412 grp_namefn, bgrp_ixfn, bgrp_valfn));
1413 }
1414
1415 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings