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*.c: Use Python's facilities for defining class and static methods.
[catacomb-python] / field.c
1 /* -*-c-*-
2 *
3 * Abstract fields
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 /*----- Various utilities -------------------------------------------------*/
32
33 PyTypeObject *field_pytype;
34 PyTypeObject *primefield_pytype;
35 PyTypeObject *niceprimefield_pytype;
36 PyTypeObject *binfield_pytype;
37 PyTypeObject *binpolyfield_pytype;
38 PyTypeObject *binnormfield_pytype;
39 PyTypeObject *fe_pytype;
40
41 static PyObject *fe_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
42 {
43 PyObject *x;
44 mp *z;
45 static const char *const kwlist[] = { "x", 0 };
46
47 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O:fe", KWLIST, &x))
48 return (0);
49 if (FE_PYCHECK(x) && FE_F(x) == FIELD_F(ty)) RETURN_OBJ(x);
50 if ((z = getmp(x)) == 0) return (0);
51 z = F_IN(FIELD_F(ty), z, z);
52 return (fe_pywrap((PyObject *)ty, z));
53 }
54
55 static PyObject *field_dopywrap(PyTypeObject *ty, field *f)
56 {
57 field_pyobj *fobj = newtype(ty, 0, f->ops->name);
58 fobj->f = f;
59 fobj->ty.ht_type.tp_basicsize = sizeof(fe_pyobj);
60 fobj->ty.ht_type.tp_base = fe_pytype;
61 Py_INCREF(fe_pytype);
62 fobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
63 Py_TPFLAGS_BASETYPE |
64 Py_TPFLAGS_CHECKTYPES |
65 Py_TPFLAGS_HEAPTYPE);
66 fobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
67 fobj->ty.ht_type.tp_free = 0;
68 fobj->ty.ht_type.tp_new = fe_pynew;
69 typeready(&fobj->ty.ht_type);
70 return ((PyObject *)fobj);
71 }
72
73 PyObject *field_pywrap(field *f)
74 {
75 PyTypeObject *ty;
76
77 if (STRCMP(F_NAME(f), ==, "prime")) ty = primefield_pytype;
78 else if (STRCMP(F_NAME(f), ==, "niceprime")) ty = niceprimefield_pytype;
79 else if (STRCMP(F_NAME(f), ==, "binpoly")) ty = binpolyfield_pytype;
80 else if (STRCMP(F_NAME(f), ==, "binnorm")) ty = binnormfield_pytype;
81 else abort();
82 return (field_dopywrap(ty, f));
83 }
84
85 field *field_copy(field *f)
86 {
87 if (STRCMP(F_NAME(f), ==, "prime"))
88 f = field_prime(f->m);
89 else if (STRCMP(F_NAME(f), ==, "niceprime"))
90 f = field_niceprime(f->m);
91 else if (STRCMP(F_NAME(f), ==, "binpoly"))
92 f = field_binpoly(f->m);
93 else if (STRCMP(F_NAME(f), ==, "binnorm")) {
94 fctx_binnorm *fc = (fctx_binnorm *)f;
95 f = field_binnorm(f->m, fc->ntop.r[fc->ntop.n - 1]);
96 } else
97 abort();
98 return (f);
99 }
100
101 PyObject *fe_pywrap(PyObject *fobj, mp *x)
102 {
103 fe_pyobj *z = PyObject_New(fe_pyobj, (PyTypeObject *)fobj);
104 z->f = FIELD_F(fobj);
105 Py_INCREF(fobj);
106 z->x = x;
107 return ((PyObject *)z);
108 }
109
110 static mp *tofe(field *f, PyObject *o)
111 {
112 mp *x = 0, *y = 0;
113
114 if (FE_PYCHECK(o)) {
115 if (FE_F(o) != f && !field_samep(FE_F(o), f)) return (0);
116 y = MP_COPY(FE_X(o));
117 } else if ((x = tomp(o)) != 0) {
118 if (MP_ZEROP(x))
119 y = MP_COPY(f->zero);
120 else if (MP_EQ(x, MP_ONE))
121 y = MP_COPY(f->one);
122 else
123 y = F_IN(f, MP_NEW, x);
124 MP_DROP(x);
125 }
126 return (y);
127 }
128
129 /*----- Field elements ----------------------------------------------------*/
130
131 static int febinop(PyObject *x, PyObject *y,
132 field **f, PyObject **fobj, mp **xx, mp **yy)
133 {
134 if (FE_PYCHECK(x)) *fobj = FE_FOBJ(x);
135 else if (FE_PYCHECK(y)) *fobj = FE_FOBJ(y);
136 else return (-1);
137 *f = FIELD_F(*fobj);
138 if ((*xx = tofe(*f, x)) == 0)
139 return (-1);
140 if ((*yy = tofe(*f, y)) == 0) {
141 MP_DROP(*xx);
142 return (-1);
143 }
144 return (0);
145 }
146
147 #define BINOP(name) \
148 static PyObject *fe_py##name(PyObject *x, PyObject *y) { \
149 PyObject *fobj; \
150 field *ff; \
151 mp *xx, *yy, *zz; \
152 if (febinop(x, y, &ff, &fobj, &xx, &yy)) RETURN_NOTIMPL; \
153 zz = ff->ops->name(ff, MP_NEW, xx, yy); \
154 MP_DROP(xx); MP_DROP(yy); \
155 return (fe_pywrap(fobj, zz)); \
156 }
157 BINOP(add)
158 BINOP(sub)
159 BINOP(mul)
160 #undef BINOP
161
162 static PyObject *fe_pydiv(PyObject *x, PyObject *y)
163 {
164 PyObject *fobj;
165 field *ff;
166 mp *xx, *yy;
167 PyObject *z = 0;
168 if (febinop(x, y, &ff, &fobj, &xx, &yy)) RETURN_NOTIMPL;
169 if (F_ZEROP(ff, yy)) ZDIVERR("division by zero");
170 yy = F_INV(ff, yy, yy);
171 z = fe_pywrap(fobj, F_MUL(ff, MP_NEW, xx, yy));
172 end:
173 MP_DROP(xx); MP_DROP(yy);
174 return (z);
175 }
176
177 static PyObject *fe_pyexp(PyObject *x, PyObject *y, PyObject *z)
178 {
179 field *ff;
180 mp *xx, *yy;
181
182 if (z != Py_None || !FE_PYCHECK(x) || (yy = tomp(y)) == 0)
183 RETURN_NOTIMPL;
184 ff = FE_F(x); xx = FE_X(x); MP_COPY(xx);
185 if (MP_NEGP(yy) && F_ZEROP(ff, xx)) ZDIVERR("division by zero");
186 z = fe_pywrap(FE_FOBJ(x), field_exp(ff, MP_NEW, xx, yy));
187 end:
188 MP_DROP(xx); MP_DROP(yy);
189 return (z);
190 }
191
192 static PyObject *fe_pyneg(PyObject *x)
193 {
194 return fe_pywrap(FE_FOBJ(x), FE_F(x)->ops->neg(FE_F(x), MP_NEW, FE_X(x)));
195 }
196
197 static PyObject *fe_pyid(PyObject *x) { RETURN_OBJ(x); }
198
199 static int fe_pynonzerop(PyObject *x) { return !F_ZEROP(FE_F(x), FE_X(x)); }
200
201 static PyObject *fe_pyrichcompare(PyObject *x, PyObject *y, int op)
202 {
203 PyObject *fobj;
204 field *ff;
205 mp *xx, *yy;
206 int b;
207 PyObject *rc = 0;
208
209 if (febinop(x, y, &ff, &fobj, &xx, &yy)) RETURN_NOTIMPL;
210 switch (op) {
211 case Py_EQ: b = MP_EQ(xx, yy); break;
212 case Py_NE: b = !MP_EQ(xx, yy); break;
213 default: TYERR("field elements are unordered");
214 }
215 rc = getbool(b);
216 end:
217 MP_DROP(xx); MP_DROP(yy);
218 return (rc);
219 }
220
221 static long fe_pyhash(PyObject *me)
222 { return (mphash(FE_X(me))); }
223
224 static int fe_pycoerce(PyObject **x, PyObject **y)
225 {
226 mp *z;
227
228 if (FE_PYCHECK(*y)) {
229 if (FE_F(*x) != FE_F(*y) && !field_samep(FE_F(*x), FE_F(*y)))
230 TYERR("field mismatch");
231 Py_INCREF(*x); Py_INCREF(*y);
232 return (0);
233 }
234 if ((z = tofe(FE_F(*x), *y)) != 0) {
235 Py_INCREF(*x);
236 *y = fe_pywrap(FE_FOBJ(*x), z);
237 return (0);
238 }
239 return (1);
240
241 end:
242 return (-1);
243 }
244
245 static PyObject *fe_pyint(PyObject *x)
246 {
247 long l;
248 PyObject *rc;
249 mp *xx = F_OUT(FE_F(x), MP_NEW, FE_X(x));
250 if (!mp_tolong_checked(xx, &l, 0)) rc = PyInt_FromLong(l);
251 else rc = mp_topylong(xx);
252 MP_DROP(xx);
253 return (rc);
254 }
255
256 static PyObject *fe_pylong(PyObject *x)
257 {
258 mp *xx = F_OUT(FE_F(x), MP_NEW, FE_X(x));
259 PyObject *rc = mp_topylong(xx);
260 MP_DROP(xx);
261 return (rc);
262 }
263
264 #define BASEOP(name, radix, pre) \
265 static PyObject *fe_py##name(PyObject *x) { \
266 mp *xx = F_OUT(FE_F(x), MP_NEW, FE_X(x)); \
267 PyObject *rc = mp_topystring(xx, radix, 0, pre, 0); \
268 MP_DROP(xx); \
269 return (rc); \
270 }
271 BASEOP(oct, 8, "0");
272 BASEOP(hex, 16, "0x");
273 #undef BASEOP
274
275 static void fe_pydealloc(PyObject *me)
276 {
277 Py_DECREF(FE_FOBJ(me));
278 MP_DROP(FE_X(me));
279 FREEOBJ(me);
280 }
281
282 #define UNOP(name, check) \
283 static PyObject *femeth_##name(PyObject *me, PyObject *arg) { \
284 field *f = FE_F(me); \
285 mp *x = FE_X(me); \
286 if (!PyArg_ParseTuple(arg, ":" #name)) return (0); \
287 if (!f->ops->name) TYERR(#name " not supported for this field"); \
288 check \
289 x = f->ops->name(f, MP_NEW, x); \
290 if (!x) RETURN_NONE; \
291 return (fe_pywrap(FE_FOBJ(me), x)); \
292 end: \
293 return (0); \
294 }
295 UNOP(inv, if (F_ZEROP(f, x)) ZDIVERR("division by zero"); )
296 UNOP(sqr, ; )
297 UNOP(sqrt, ; )
298 UNOP(quadsolve, ; )
299 UNOP(dbl, ; )
300 UNOP(tpl, ; )
301 UNOP(qdl, ; )
302 UNOP(hlv, ; )
303 #undef UNOP
304
305 static PyObject *feget_field(PyObject *me, void *hunoz)
306 { RETURN_OBJ(FE_FOBJ(me)); }
307
308 static PyObject *feget_value(PyObject *me, void *hunoz)
309 {
310 mp *x = F_OUT(FE_F(me), MP_NEW, FE_X(me));
311 if (F_TYPE(FE_F(me)) == FTY_BINARY)
312 return (gf_pywrap(x));
313 else
314 return (mp_pywrap(x));
315 }
316
317 static PyObject *feget__value(PyObject *me, void *hunoz)
318 {
319 mp *x = FE_X(me);
320 MP_COPY(x);
321 if (F_TYPE(FE_F(me)) == FTY_BINARY)
322 return (gf_pywrap(x));
323 else
324 return (mp_pywrap(x));
325 }
326
327 static const PyGetSetDef fe_pygetset[] = {
328 #define GETSETNAME(op, name) fe##op##_##name
329 GET (field, "X.field -> field containing X")
330 GET (value, "X.value -> `natural' MP/GF representation of X")
331 GET (_value, "X._value -> internal MP/GF representation of X")
332 #undef GETSETNAME
333 { 0 }
334 };
335
336 static const PyMethodDef fe_pymethods[] = {
337 #define METHNAME(func) femeth_##func
338 METH (inv, "X.inv() -> X^{-1}")
339 METH (sqr, "X.sqr() -> X^2")
340 METH (sqrt, "X.sqrt() -> sqrt(X)")
341 METH (quadsolve, "X.quadsolve() -> Y where Y^2 + Y = X (binary only)")
342 METH (dbl, "X.dbl() -> 2 * X (prime only)")
343 METH (tpl, "X.tpl() -> 3 * X (prime only)")
344 METH (qdl, "X.qdl() -> 4 * X (prime only)")
345 METH (hlv, "X.hlv() -> X/2 (prime only)")
346 #undef METHNAME
347 { 0 }
348 };
349
350 static const PyNumberMethods fe_pynumber = {
351 fe_pyadd, /* @nb_add@ */
352 fe_pysub, /* @nb_subtract@ */
353 fe_pymul, /* @nb_multiply@ */
354 fe_pydiv, /* @nb_divide@ */
355 0, /* @nb_remainder@ */
356 0, /* @nb_divmod@ */
357 fe_pyexp, /* @nb_power@ */
358 fe_pyneg, /* @nb_negative@ */
359 fe_pyid, /* @nb_positive@ */
360 0, /* @nb_absolute@ */
361 fe_pynonzerop, /* @nb_nonzero@ */
362 0, /* @nb_invert@ */
363 0, /* @nb_lshift@ */
364 0, /* @nb_rshift@ */
365 0, /* @nb_and@ */
366 0, /* @nb_xor@ */
367 0, /* @nb_or@ */
368 fe_pycoerce, /* @nb_coerce@ */
369 fe_pyint, /* @nb_int@ */
370 fe_pylong, /* @nb_long@ */
371 0 /* meaningless */, /* @nb_float@ */
372 fe_pyoct, /* @nb_oct@ */
373 fe_pyhex, /* @nb_hex@ */
374
375 0, /* @nb_inplace_add@ */
376 0, /* @nb_inplace_subtract@ */
377 0, /* @nb_inplace_multiply@ */
378 0, /* @nb_inplace_divide@ */
379 0, /* @nb_inplace_remainder@ */
380 0, /* @nb_inplace_power@ */
381 0, /* @nb_inplace_lshift@ */
382 0, /* @nb_inplace_rshift@ */
383 0, /* @nb_inplace_and@ */
384 0, /* @nb_inplace_xor@ */
385 0, /* @nb_inplace_or@ */
386
387 0, /* @nb_floor_divide@ */
388 fe_pydiv, /* @nb_true_divide@ */
389 0, /* @nb_inplace_floor_divide@ */
390 0, /* @nb_inplace_true_divide@ */
391 };
392
393 static PyTypeObject fe_pytype_skel = {
394 PyObject_HEAD_INIT(0) 0, /* Header */
395 "FE", /* @tp_name@ */
396 sizeof(fe_pyobj), /* @tp_basicsize@ */
397 0, /* @tp_itemsize@ */
398
399 fe_pydealloc, /* @tp_dealloc@ */
400 0, /* @tp_print@ */
401 0, /* @tp_getattr@ */
402 0, /* @tp_setattr@ */
403 0, /* @tp_compare@ */
404 0, /* @tp_repr@ */
405 PYNUMBER(fe), /* @tp_as_number@ */
406 0, /* @tp_as_sequence@ */
407 0, /* @tp_as_mapping@ */
408 fe_pyhash, /* @tp_hash@ */
409 0, /* @tp_call@ */
410 fe_pyhex, /* @tp_str@ */
411 0, /* @tp_getattro@ */
412 0, /* @tp_setattro@ */
413 0, /* @tp_as_buffer@ */
414 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
415 Py_TPFLAGS_CHECKTYPES |
416 Py_TPFLAGS_BASETYPE,
417
418 /* @tp_doc@ */
419 "Finite field elements, abstract base class.",
420
421 0, /* @tp_traverse@ */
422 0, /* @tp_clear@ */
423 fe_pyrichcompare, /* @tp_richcompare@ */
424 0, /* @tp_weaklistoffset@ */
425 0, /* @tp_iter@ */
426 0, /* @tp_iternext@ */
427 PYMETHODS(fe), /* @tp_methods@ */
428 0, /* @tp_members@ */
429 PYGETSET(fe), /* @tp_getset@ */
430 0, /* @tp_base@ */
431 0, /* @tp_dict@ */
432 0, /* @tp_descr_get@ */
433 0, /* @tp_descr_set@ */
434 0, /* @tp_dictoffset@ */
435 0, /* @tp_init@ */
436 PyType_GenericAlloc, /* @tp_alloc@ */
437 abstract_pynew, /* @tp_new@ */
438 0, /* @tp_free@ */
439 0 /* @tp_is_gc@ */
440 };
441
442 /*----- Fields ------------------------------------------------------------*/
443
444 static PyObject *field_pyrichcompare(PyObject *x, PyObject *y, int op)
445 {
446 int b = field_samep(FIELD_F(x), FIELD_F(y));
447 switch (op) {
448 case Py_EQ: break;
449 case Py_NE: b = !b;
450 default: TYERR("can't order fields");
451 }
452 return (getbool(b));
453 end:
454 return (0);
455 }
456
457 static PyObject *fmeth_rand(PyObject *me, PyObject *arg, PyObject *kw)
458 {
459 static const char *const kwlist[] = { "rng", 0 };
460 grand *r = &rand_global;
461
462 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:rand", KWLIST,
463 convgrand, &r))
464 return (0);
465 return (fe_pywrap(me, F_RAND(FIELD_F(me), MP_NEW, r)));
466 }
467
468 static PyObject *fmeth__adopt(PyObject *me, PyObject *arg)
469 {
470 mp *xx;
471 if (!PyArg_ParseTuple(arg, "O&:_adopt", convmp, &xx)) return (0);
472 return (fe_pywrap(me, xx));
473 }
474
475 static PyObject *fmeth_parse(PyObject *me, PyObject *arg)
476 {
477 field *f;
478 char *p;
479 PyObject *rc = 0;
480 qd_parse qd;
481
482 if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
483 qd.p = p; qd.e = 0;
484 if ((f = field_parse(&qd)) == 0) VALERR(qd.e);
485 rc = Py_BuildValue("(Ns)", field_pywrap(f), qd.p);
486 end:
487 return (rc);
488 }
489
490 static void field_pydealloc(PyObject *me)
491 {
492 F_DESTROY(FIELD_F(me));
493 PyType_Type.tp_dealloc(me);
494 }
495
496 static PyObject *fget_zero(PyObject *me, void *hunoz)
497 { return (fe_pywrap(me, MP_COPY(FIELD_F(me)->zero))); }
498
499 static PyObject *fget_one(PyObject *me, void *hunoz)
500 { return (fe_pywrap(me, MP_COPY(FIELD_F(me)->one))); }
501
502 static PyObject *fget_q(PyObject *me, void *hunoz)
503 { return (mp_pywrap(MP_COPY(FIELD_F(me)->q))); }
504
505 static PyObject *fget_nbits(PyObject *me, void *hunoz)
506 { return (PyInt_FromLong(FIELD_F(me)->nbits)); }
507
508 static PyObject *fget_noctets(PyObject *me, void *hunoz)
509 { return (PyInt_FromLong(FIELD_F(me)->noctets)); }
510
511 static PyObject *fget_name(PyObject *me, void *hunoz)
512 { return (PyString_FromString(F_NAME(FIELD_F(me)))); }
513
514 static PyObject *fget_type(PyObject *me, void *hunoz)
515 { return (PyInt_FromLong(F_TYPE(FIELD_F(me)))); }
516
517 static const PyGetSetDef field_pygetset[] = {
518 #define GETSETNAME(op, name) f##op##_##name
519 GET (zero, "F.zero -> field additive identity")
520 GET (one, "F.one -> field multiplicative identity")
521 GET (q, "F.q -> number of elements in field")
522 GET (nbits, "F.nbits -> bits needed to represent element")
523 GET (noctets, "F.noctets -> octetss needed to represent element")
524 GET (name, "F.name -> name of this kind of field")
525 GET (type, "F.type -> type code of this kind of field")
526 #undef GETSETNAME
527 { 0 }
528 };
529
530 static const PyMethodDef field_pymethods[] = {
531 #define METHNAME(name) fmeth_##name
532 METH (_adopt, "F._adopt(X) -> FE")
533 KWMETH(rand, "F.rand([rng = rand]) -> FE, uniformly distributed")
534 SMTH (parse, "parse(STR) -> F, REST")
535 #undef METHNAME
536 { 0 }
537 };
538
539 static PyTypeObject field_pytype_skel = {
540 PyObject_HEAD_INIT(0) 0, /* Header */
541 "Field", /* @tp_name@ */
542 sizeof(field_pyobj), /* @tp_basicsize@ */
543 0, /* @tp_itemsize@ */
544
545 field_pydealloc, /* @tp_dealloc@ */
546 0, /* @tp_print@ */
547 0, /* @tp_getattr@ */
548 0, /* @tp_setattr@ */
549 0, /* @tp_compare@ */
550 0, /* @tp_repr@ */
551 0, /* @tp_as_number@ */
552 0, /* @tp_as_sequence@ */
553 0, /* @tp_as_mapping@ */
554 0, /* @tp_hash@ */
555 0, /* @tp_call@ */
556 0, /* @tp_str@ */
557 0, /* @tp_getattro@ */
558 0, /* @tp_setattro@ */
559 0, /* @tp_as_buffer@ */
560 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
561 Py_TPFLAGS_BASETYPE,
562
563 /* @tp_doc@ */
564 "An abstract field. This is an abstract type.",
565
566 0, /* @tp_traverse@ */
567 0, /* @tp_clear@ */
568 field_pyrichcompare, /* @tp_richcompare@ */
569 0, /* @tp_weaklistoffset@ */
570 0, /* @tp_iter@ */
571 0, /* @tp_iternext@ */
572 PYMETHODS(field), /* @tp_methods@ */
573 0, /* @tp_members@ */
574 PYGETSET(field), /* @tp_getset@ */
575 0, /* @tp_base@ */
576 0, /* @tp_dict@ */
577 0, /* @tp_descr_get@ */
578 0, /* @tp_descr_set@ */
579 0, /* @tp_dictoffset@ */
580 0, /* @tp_init@ */
581 PyType_GenericAlloc, /* @tp_alloc@ */
582 abstract_pynew, /* @tp_new@ */
583 0, /* @tp_free@ */
584 0 /* @tp_is_gc@ */
585 };
586
587 /*----- Prime fields ------------------------------------------------------*/
588
589 static PyObject *primefield_pynew(PyTypeObject *ty,
590 PyObject *arg, PyObject *kw)
591 {
592 mp *xx = 0;
593 field *f;
594 static const char *const kwlist[] = { "p", 0 };
595
596 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:primefield", KWLIST,
597 convmp, &xx))
598 goto end;
599 if ((f = field_prime(xx)) == 0)
600 VALERR("bad prime for primefield");
601 MP_DROP(xx);
602 return (field_dopywrap(ty, f));
603 end:
604 mp_drop(xx);
605 return (0);
606 }
607
608 static PyObject *pfget_p(PyObject *me, void *hunoz)
609 { return (mp_pywrap(MP_COPY(FIELD_F(me)->m))); }
610
611 static const PyGetSetDef primefield_pygetset[] = {
612 #define GETSETNAME(op, name) pf##op##_##name
613 GET (p, "F.p -> prime field characteristic")
614 #undef GETSETNAME
615 };
616
617 static PyTypeObject primefield_pytype_skel = {
618 PyObject_HEAD_INIT(0) 0, /* Header */
619 "PrimeField", /* @tp_name@ */
620 sizeof(field_pyobj), /* @tp_basicsize@ */
621 0, /* @tp_itemsize@ */
622
623 field_pydealloc, /* @tp_dealloc@ */
624 0, /* @tp_print@ */
625 0, /* @tp_getattr@ */
626 0, /* @tp_setattr@ */
627 0, /* @tp_compare@ */
628 0, /* @tp_repr@ */
629 0, /* @tp_as_number@ */
630 0, /* @tp_as_sequence@ */
631 0, /* @tp_as_mapping@ */
632 0, /* @tp_hash@ */
633 0, /* @tp_call@ */
634 0, /* @tp_str@ */
635 0, /* @tp_getattro@ */
636 0, /* @tp_setattro@ */
637 0, /* @tp_as_buffer@ */
638 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
639 Py_TPFLAGS_BASETYPE,
640
641 /* @tp_doc@ */
642 "PrimeField(P): prime fields.",
643
644 0, /* @tp_traverse@ */
645 0, /* @tp_clear@ */
646 field_pyrichcompare, /* @tp_richcompare@ */
647 0, /* @tp_weaklistoffset@ */
648 0, /* @tp_iter@ */
649 0, /* @tp_iternext@ */
650 0, /* @tp_methods@ */
651 0, /* @tp_members@ */
652 PYGETSET(primefield), /* @tp_getset@ */
653 0, /* @tp_base@ */
654 0, /* @tp_dict@ */
655 0, /* @tp_descr_get@ */
656 0, /* @tp_descr_set@ */
657 0, /* @tp_dictoffset@ */
658 0, /* @tp_init@ */
659 PyType_GenericAlloc, /* @tp_alloc@ */
660 primefield_pynew, /* @tp_new@ */
661 0, /* @tp_free@ */
662 0 /* @tp_is_gc@ */
663 };
664
665 static PyObject *niceprimefield_pynew(PyTypeObject *ty,
666 PyObject *arg, PyObject *kw)
667 {
668 mp *xx = 0;
669 field *f;
670 static const char *const kwlist[] = { "p", 0 };
671
672 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:niceprimefield",
673 KWLIST, convmp, &xx))
674 goto end;
675 if ((f = field_niceprime(xx)) == 0)
676 VALERR("bad prime for niceprimefield");
677 MP_DROP(xx);
678 return (field_dopywrap(ty, f));
679 end:
680 mp_drop(xx);
681 return (0);
682 }
683
684 static PyTypeObject niceprimefield_pytype_skel = {
685 PyObject_HEAD_INIT(0) 0, /* Header */
686 "NicePrimeField", /* @tp_name@ */
687 sizeof(field_pyobj), /* @tp_basicsize@ */
688 0, /* @tp_itemsize@ */
689
690 field_pydealloc, /* @tp_dealloc@ */
691 0, /* @tp_print@ */
692 0, /* @tp_getattr@ */
693 0, /* @tp_setattr@ */
694 0, /* @tp_compare@ */
695 0, /* @tp_repr@ */
696 0, /* @tp_as_number@ */
697 0, /* @tp_as_sequence@ */
698 0, /* @tp_as_mapping@ */
699 0, /* @tp_hash@ */
700 0, /* @tp_call@ */
701 0, /* @tp_str@ */
702 0, /* @tp_getattro@ */
703 0, /* @tp_setattro@ */
704 0, /* @tp_as_buffer@ */
705 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
706 Py_TPFLAGS_BASETYPE,
707
708 /* @tp_doc@ */
709 "NicePrimeField(P): prime field using Solinas reduction.",
710
711 0, /* @tp_traverse@ */
712 0, /* @tp_clear@ */
713 field_pyrichcompare, /* @tp_richcompare@ */
714 0, /* @tp_weaklistoffset@ */
715 0, /* @tp_iter@ */
716 0, /* @tp_iternext@ */
717 0, /* @tp_methods@ */
718 0, /* @tp_members@ */
719 0, /* @tp_getset@ */
720 0, /* @tp_base@ */
721 0, /* @tp_dict@ */
722 0, /* @tp_descr_get@ */
723 0, /* @tp_descr_set@ */
724 0, /* @tp_dictoffset@ */
725 0, /* @tp_init@ */
726 PyType_GenericAlloc, /* @tp_alloc@ */
727 niceprimefield_pynew, /* @tp_new@ */
728 0, /* @tp_free@ */
729 0 /* @tp_is_gc@ */
730 };
731
732 /*----- Binary fields -----------------------------------------------------*/
733
734 static PyObject *bfget_m(PyObject *me, void *hunoz)
735 { return (PyInt_FromLong(FIELD_F(me)->nbits)); }
736
737 static PyObject *bfget_p(PyObject *me, void *hunoz)
738 { return (gf_pywrap(MP_COPY(FIELD_F(me)->m))); }
739
740 static const PyGetSetDef binfield_pygetset[] = {
741 #define GETSETNAME(op, name) bf##op##_##name
742 GET (m, "F.m -> field polynomial degree")
743 GET (p, "F.p -> field polynomial")
744 #undef GETSETNAME
745 { 0 }
746 };
747
748 static PyTypeObject binfield_pytype_skel = {
749 PyObject_HEAD_INIT(0) 0, /* Header */
750 "BinField", /* @tp_name@ */
751 sizeof(field_pyobj), /* @tp_basicsize@ */
752 0, /* @tp_itemsize@ */
753
754 field_pydealloc, /* @tp_dealloc@ */
755 0, /* @tp_print@ */
756 0, /* @tp_getattr@ */
757 0, /* @tp_setattr@ */
758 0, /* @tp_compare@ */
759 0, /* @tp_repr@ */
760 0, /* @tp_as_number@ */
761 0, /* @tp_as_sequence@ */
762 0, /* @tp_as_mapping@ */
763 0, /* @tp_hash@ */
764 0, /* @tp_call@ */
765 0, /* @tp_str@ */
766 0, /* @tp_getattro@ */
767 0, /* @tp_setattro@ */
768 0, /* @tp_as_buffer@ */
769 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
770 Py_TPFLAGS_BASETYPE,
771
772 /* @tp_doc@ */
773 "Binary fields. Abstract class.",
774
775 0, /* @tp_traverse@ */
776 0, /* @tp_clear@ */
777 field_pyrichcompare, /* @tp_richcompare@ */
778 0, /* @tp_weaklistoffset@ */
779 0, /* @tp_iter@ */
780 0, /* @tp_iternext@ */
781 0, /* @tp_methods@ */
782 0, /* @tp_members@ */
783 PYGETSET(binfield), /* @tp_getset@ */
784 0, /* @tp_base@ */
785 0, /* @tp_dict@ */
786 0, /* @tp_descr_get@ */
787 0, /* @tp_descr_set@ */
788 0, /* @tp_dictoffset@ */
789 0, /* @tp_init@ */
790 PyType_GenericAlloc, /* @tp_alloc@ */
791 abstract_pynew, /* @tp_new@ */
792 0, /* @tp_free@ */
793 0 /* @tp_is_gc@ */
794 };
795
796 static PyObject *binpolyfield_pynew(PyTypeObject *ty,
797 PyObject *arg, PyObject *kw)
798 {
799 mp *xx = 0;
800 field *f;
801 static const char *const kwlist[] = { "p", 0 };
802
803 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:binpolyfield", KWLIST,
804 convgf, &xx))
805 goto end;
806 if ((f = field_binpoly(xx)) == 0) VALERR("bad poly for binpolyfield");
807 MP_DROP(xx);
808 return (field_dopywrap(ty, f));
809 end:
810 mp_drop(xx);
811 return (0);
812 }
813
814 static PyTypeObject binpolyfield_pytype_skel = {
815 PyObject_HEAD_INIT(0) 0, /* Header */
816 "BinPolyField", /* @tp_name@ */
817 sizeof(field_pyobj), /* @tp_basicsize@ */
818 0, /* @tp_itemsize@ */
819
820 field_pydealloc, /* @tp_dealloc@ */
821 0, /* @tp_print@ */
822 0, /* @tp_getattr@ */
823 0, /* @tp_setattr@ */
824 0, /* @tp_compare@ */
825 0, /* @tp_repr@ */
826 0, /* @tp_as_number@ */
827 0, /* @tp_as_sequence@ */
828 0, /* @tp_as_mapping@ */
829 0, /* @tp_hash@ */
830 0, /* @tp_call@ */
831 0, /* @tp_str@ */
832 0, /* @tp_getattro@ */
833 0, /* @tp_setattro@ */
834 0, /* @tp_as_buffer@ */
835 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
836 Py_TPFLAGS_BASETYPE,
837
838 /* @tp_doc@ */
839 "BinPolyField(P): binary fields with polynomial basis representation.",
840
841 0, /* @tp_traverse@ */
842 0, /* @tp_clear@ */
843 field_pyrichcompare, /* @tp_richcompare@ */
844 0, /* @tp_weaklistoffset@ */
845 0, /* @tp_iter@ */
846 0, /* @tp_iternext@ */
847 0, /* @tp_methods@ */
848 0, /* @tp_members@ */
849 0, /* @tp_getset@ */
850 0, /* @tp_base@ */
851 0, /* @tp_dict@ */
852 0, /* @tp_descr_get@ */
853 0, /* @tp_descr_set@ */
854 0, /* @tp_dictoffset@ */
855 0, /* @tp_init@ */
856 PyType_GenericAlloc, /* @tp_alloc@ */
857 binpolyfield_pynew, /* @tp_new@ */
858 0, /* @tp_free@ */
859 0 /* @tp_is_gc@ */
860 };
861
862 static PyObject *binnormfield_pynew(PyTypeObject *ty,
863 PyObject *arg, PyObject *kw)
864 {
865 mp *xx = 0, *yy = 0;
866 field *f;
867 static const char *const kwlist[] = { "p", "beta", 0 };
868
869 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:binnormfield",
870 KWLIST, convgf, &xx, convgf, &yy))
871 goto end;
872 if ((f = field_binnorm(xx, yy)) == 0) VALERR("bad args for binnormfield");
873 MP_DROP(xx); MP_DROP(yy);
874 return (field_dopywrap(ty, f));
875 end:
876 mp_drop(xx); mp_drop(yy);
877 return (0);
878 }
879
880 static PyObject *bnfget_beta(PyObject *me, void *hunoz)
881 {
882 fctx_binnorm *fc = (fctx_binnorm *)FIELD_F(me);
883 return (gf_pywrap(MP_COPY(fc->ntop.r[fc->ntop.n - 1])));
884 }
885
886 static const PyGetSetDef binnormfield_pygetset[] = {
887 #define GETSETNAME(op, name) bnf##op##_##name
888 GET (beta, "F.beta -> conversion factor")
889 #undef GETSETNAME
890 { 0 }
891 };
892
893 static PyTypeObject binnormfield_pytype_skel = {
894 PyObject_HEAD_INIT(0) 0, /* Header */
895 "BinNormField", /* @tp_name@ */
896 sizeof(field_pyobj), /* @tp_basicsize@ */
897 0, /* @tp_itemsize@ */
898
899 field_pydealloc, /* @tp_dealloc@ */
900 0, /* @tp_print@ */
901 0, /* @tp_getattr@ */
902 0, /* @tp_setattr@ */
903 0, /* @tp_compare@ */
904 0, /* @tp_repr@ */
905 0, /* @tp_as_number@ */
906 0, /* @tp_as_sequence@ */
907 0, /* @tp_as_mapping@ */
908 0, /* @tp_hash@ */
909 0, /* @tp_call@ */
910 0, /* @tp_str@ */
911 0, /* @tp_getattro@ */
912 0, /* @tp_setattro@ */
913 0, /* @tp_as_buffer@ */
914 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
915 Py_TPFLAGS_BASETYPE,
916
917 /* @tp_doc@ */
918 "BinNormField(P, BETA): binary fields with normal basis representation.",
919
920 0, /* @tp_traverse@ */
921 0, /* @tp_clear@ */
922 field_pyrichcompare, /* @tp_richcompare@ */
923 0, /* @tp_weaklistoffset@ */
924 0, /* @tp_iter@ */
925 0, /* @tp_iternext@ */
926 0, /* @tp_methods@ */
927 0, /* @tp_members@ */
928 PYGETSET(binnormfield), /* @tp_getset@ */
929 0, /* @tp_base@ */
930 0, /* @tp_dict@ */
931 0, /* @tp_descr_get@ */
932 0, /* @tp_descr_set@ */
933 0, /* @tp_dictoffset@ */
934 0, /* @tp_init@ */
935 PyType_GenericAlloc, /* @tp_alloc@ */
936 binnormfield_pynew, /* @tp_new@ */
937 0, /* @tp_free@ */
938 0 /* @tp_is_gc@ */
939 };
940
941 /*----- Setup -------------------------------------------------------------*/
942
943 void field_pyinit(void)
944 {
945 INITTYPE(fe, root);
946 INITTYPE(field, type);
947 INITTYPE(primefield, field);
948 INITTYPE(niceprimefield, primefield);
949 INITTYPE(binfield, field);
950 INITTYPE(binpolyfield, binfield);
951 INITTYPE(binnormfield, binfield);
952 }
953
954 void field_pyinsert(PyObject *mod)
955 {
956 INSERT("FE", fe_pytype);
957 INSERT("Field", field_pytype);
958 INSERT("PrimeField", primefield_pytype);
959 INSERT("NicePrimeField", niceprimefield_pytype);
960 INSERT("BinField", binfield_pytype);
961 INSERT("BinPolyField", binpolyfield_pytype);
962 INSERT("BinNormField", binnormfield_pytype);
963 }
964
965 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings