chiark - git - mdw - catacomb-python/blob - 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   char *k;
 200   Py_ssize_t ksz;
 201   struct excinfo exc = EXCINFO_INIT;
 202   pypgev evt = { { 0 } };
 203   static const char *const kwlist[] =
 204     { "pbits", "qbits", "seed", "event", "nsteps", 0 };
 205   PyObject *rc = 0;
 206
 207   evt.exc = &exc;
 208   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&s#|O&O&:gendsa", KWLIST,
 209                                    convuint, &pl, convuint, &ql,
 210                                    &k, &ksz, convpgev, &evt,
 211                                    convuint, &steps))
 212     goto end;
 213   if (dsa_gen(&dp, ql, pl, steps, k, ksz, &ds, evt.ev.proc, evt.ev.ctx))
 214     PGENERR(&exc);
 215   rc = Py_BuildValue("(NNl)", fginfo_pywrap(&dp, dhinfo_pytype),
 216                      bytestring_pywrap(ds.p, ds.sz), (long)ds.count);
 217   xfree(ds.p);
 218 end:
 219   droppgev(&evt);
 220   return (rc);
 221 }
 222
 223 static PyObject *meth__parse(PyObject *me, PyObject *arg, PyTypeObject *ty,
 224                              int (*parse)(qd_parse *, gprime_param *))
 225 {
 226   qd_parse qd;
 227   char *p;
 228   gprime_param gp;
 229   PyObject *rc = 0;
 230
 231   if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
 232   qd.p = p; qd.e = 0;
 233   if (parse(&qd, &gp)) VALERR(qd.e);
 234   rc = fginfo_pywrap(&gp, ty);
 235 end:
 236   return (rc);
 237 }
 238
 239 static PyObject *dimeth_parse(PyObject *me, PyObject *arg)
 240   { return (meth__parse(me, arg, dhinfo_pytype, dh_parse)); }
 241
 242 static PyObject *bimeth_parse(PyObject *me, PyObject *arg)
 243   { return (meth__parse(me, arg, bindhinfo_pytype, dhbin_parse)); }
 244
 245 static const PyGetSetDef fginfo_pygetset[] = {
 246 #define GETSETNAME(op, name) fi##op##_##name
 247   GET   (r,             "I.r -> group order")
 248 #undef GETSETNAME
 249   { 0 }
 250 };
 251
 252 static const PyGetSetDef dhinfo_pygetset[] = {
 253 #define GETSETNAME(op, name) di##op##_##name
 254   GET   (p,             "I.p -> prime")
 255   GET   (g,             "I.g -> generator")
 256 #undef GETSETNAME
 257   { 0 }
 258 };
 259
 260 static const PyMethodDef dhinfo_pymethods[] = {
 261 #define METHNAME(name) dimeth_##name
 262   SMTH  (parse,         "parse(STR) -> D, REST")
 263   KWSMTH(generate,
 264        "generate(PBITS, [qbits = 0], [event = pgen_nullev],\n"
 265        "         [rng = rand], [nsteps = 0]) -> D")
 266   KWSMTH(genlimlee,
 267        "genlimlee(PBITS, QBITS, [event = pgen_nullev], "
 268                                                   "[ievent = pgen_nullev],\n"
 269        "          [rng = rand], [nsteps = 0], [subgroupp = True]) "
 270                                                           "-> (D, [Q, ...])")
 271   KWSMTH(gendsa,
 272        "gendsa(PBITS, QBITS, SEED, [event = pgen_nullev], [nsteps = 0])\n"
 273        "  -> (D, SEED, COUNT)")
 274   KWSMTH(genkcdsa,
 275        "gendsa(PBITS, QBITS, [event = pgen_nullev], "
 276                                               "[rng = rand], [nsteps = 0])\n"
 277        "  -> (D, V)")
 278 #undef METHNAME
 279   { 0 }
 280 };
 281
 282 static const PyGetSetDef bindhinfo_pygetset[] = {
 283 #define GETSETNAME(op, name) bi##op##_##name
 284   GET   (p,             "I.p -> irreducible polynomial")
 285   GET   (m,             "I.m -> degree of polynomial")
 286   GET   (g,             "I.g -> generator")
 287 #undef GETSETNAME
 288   { 0 }
 289 };
 290
 291 static const PyMethodDef bindhinfo_pymethods[] = {
 292 #define METHNAME(name) bimeth_##name
 293   SMTH  (parse,         "parse(STR) -> D, REST")
 294 #undef METHNAME
 295   { 0 }
 296 };
 297
 298 static const PyTypeObject fginfo_pytype_skel = {
 299   PyObject_HEAD_INIT(0) 0,              /* Header */
 300   "FGInfo",                             /* @tp_name@ */
 301   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 302   0,                                    /* @tp_itemsize@ */
 303
 304   fginfo_pydealloc,                     /* @tp_dealloc@ */
 305   0,                                    /* @tp_print@ */
 306   0,                                    /* @tp_getattr@ */
 307   0,                                    /* @tp_setattr@ */
 308   0,                                    /* @tp_compare@ */
 309   0,                                    /* @tp_repr@ */
 310   0,                                    /* @tp_as_number@ */
 311   0,                                    /* @tp_as_sequence@ */
 312   0,                                    /* @tp_as_mapping@ */
 313   0,                                    /* @tp_hash@ */
 314   0,                                    /* @tp_call@ */
 315   0,                                    /* @tp_str@ */
 316   0,                                    /* @tp_getattro@ */
 317   0,                                    /* @tp_setattro@ */
 318   0,                                    /* @tp_as_buffer@ */
 319   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 320     Py_TPFLAGS_BASETYPE,
 321
 322   /* @tp_doc@ */
 323   "Abstract base class for field-group information objects.",
 324
 325   0,                                    /* @tp_traverse@ */
 326   0,                                    /* @tp_clear@ */
 327   0,                                    /* @tp_richcompare@ */
 328   0,                                    /* @tp_weaklistoffset@ */
 329   0,                                    /* @tp_iter@ */
 330   0,                                    /* @tp_iternext@ */
 331   0,                                    /* @tp_methods@ */
 332   0,                                    /* @tp_members@ */
 333   PYGETSET(fginfo),                     /* @tp_getset@ */
 334   0,                                    /* @tp_base@ */
 335   0,                                    /* @tp_dict@ */
 336   0,                                    /* @tp_descr_get@ */
 337   0,                                    /* @tp_descr_set@ */
 338   0,                                    /* @tp_dictoffset@ */
 339   0,                                    /* @tp_init@ */
 340   PyType_GenericAlloc,                  /* @tp_alloc@ */
 341   abstract_pynew,                       /* @tp_new@ */
 342   0,                                    /* @tp_free@ */
 343   0                                     /* @tp_is_gc@ */
 344 };
 345
 346 static const PyTypeObject dhinfo_pytype_skel = {
 347   PyObject_HEAD_INIT(0) 0,              /* Header */
 348   "DHInfo",                             /* @tp_name@ */
 349   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 350   0,                                    /* @tp_itemsize@ */
 351
 352   fginfo_pydealloc,                     /* @tp_dealloc@ */
 353   0,                                    /* @tp_print@ */
 354   0,                                    /* @tp_getattr@ */
 355   0,                                    /* @tp_setattr@ */
 356   0,                                    /* @tp_compare@ */
 357   0,                                    /* @tp_repr@ */
 358   0,                                    /* @tp_as_number@ */
 359   0,                                    /* @tp_as_sequence@ */
 360   0,                                    /* @tp_as_mapping@ */
 361   0,                                    /* @tp_hash@ */
 362   0,                                    /* @tp_call@ */
 363   0,                                    /* @tp_str@ */
 364   0,                                    /* @tp_getattro@ */
 365   0,                                    /* @tp_setattro@ */
 366   0,                                    /* @tp_as_buffer@ */
 367   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 368     Py_TPFLAGS_BASETYPE,
 369
 370   /* @tp_doc@ */
 371   "DHInfo(P, R, G): standard (integer) Diffie-Hellman group information.",
 372
 373   0,                                    /* @tp_traverse@ */
 374   0,                                    /* @tp_clear@ */
 375   0,                                    /* @tp_richcompare@ */
 376   0,                                    /* @tp_weaklistoffset@ */
 377   0,                                    /* @tp_iter@ */
 378   0,                                    /* @tp_iternext@ */
 379   PYMETHODS(dhinfo),                    /* @tp_methods@ */
 380   0,                                    /* @tp_members@ */
 381   PYGETSET(dhinfo),                     /* @tp_getset@ */
 382   0,                                    /* @tp_base@ */
 383   0,                                    /* @tp_dict@ */
 384   0,                                    /* @tp_descr_get@ */
 385   0,                                    /* @tp_descr_set@ */
 386   0,                                    /* @tp_dictoffset@ */
 387   0,                                    /* @tp_init@ */
 388   PyType_GenericAlloc,                  /* @tp_alloc@ */
 389   fginfo_pynew,                         /* @tp_new@ */
 390   0,                                    /* @tp_free@ */
 391   0                                     /* @tp_is_gc@ */
 392 };
 393
 394 static const PyTypeObject bindhinfo_pytype_skel = {
 395   PyObject_HEAD_INIT(0) 0,              /* Header */
 396   "BinDHInfo",                          /* @tp_name@ */
 397   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 398   0,                                    /* @tp_itemsize@ */
 399
 400   fginfo_pydealloc,                     /* @tp_dealloc@ */
 401   0,                                    /* @tp_print@ */
 402   0,                                    /* @tp_getattr@ */
 403   0,                                    /* @tp_setattr@ */
 404   0,                                    /* @tp_compare@ */
 405   0,                                    /* @tp_repr@ */
 406   0,                                    /* @tp_as_number@ */
 407   0,                                    /* @tp_as_sequence@ */
 408   0,                                    /* @tp_as_mapping@ */
 409   0,                                    /* @tp_hash@ */
 410   0,                                    /* @tp_call@ */
 411   0,                                    /* @tp_str@ */
 412   0,                                    /* @tp_getattro@ */
 413   0,                                    /* @tp_setattro@ */
 414   0,                                    /* @tp_as_buffer@ */
 415   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 416     Py_TPFLAGS_BASETYPE,
 417
 418   /* @tp_doc@ */
 419   "BinDHInfo(P, R, G): binary-field Diffie-Hellman group information.",
 420
 421   0,                                    /* @tp_traverse@ */
 422   0,                                    /* @tp_clear@ */
 423   0,                                    /* @tp_richcompare@ */
 424   0,                                    /* @tp_weaklistoffset@ */
 425   0,                                    /* @tp_iter@ */
 426   0,                                    /* @tp_iternext@ */
 427   PYMETHODS(bindhinfo),                 /* @tp_methods@ */
 428   0,                                    /* @tp_members@ */
 429   PYGETSET(bindhinfo),                  /* @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   fginfo_pynew,                         /* @tp_new@ */
 438   0,                                    /* @tp_free@ */
 439   0                                     /* @tp_is_gc@ */
 440 };
 441
 442 /*----- General utilities -------------------------------------------------*/
 443
 444 PyTypeObject *ge_pytype, *group_pytype;
 445 static PyTypeObject *primegroup_pytype, *bingroup_pytype, *ecgroup_pytype;
 446
 447 group *group_copy(group *g)
 448 {
 449   if (STRCMP(G_NAME(g), ==, "prime")) {
 450     gctx_prime *gc = (gctx_prime *)g;
 451     gprime_param gp;
 452     gp.g = G_TOINT(g, MP_NEW, g->g);
 453     gp.p = gc->mm.m;
 454     gp.q = gc->g.r;
 455     g = group_prime(&gp);
 456     MP_DROP(gp.g);
 457   } else if (STRCMP(G_NAME(g), ==, "bin")) {
 458     gctx_bin *gc = (gctx_bin *)g;
 459     gbin_param gb;
 460     gb.g = G_TOINT(g, MP_NEW, g->g);
 461     gb.p = gc->r.p;
 462     gb.q = gc->g.r;
 463     g = group_binary(&gb);
 464     MP_DROP(gb.g);
 465   } else if (STRCMP(G_NAME(g), ==, "ec")) {
 466     gctx_ec *gc = (gctx_ec *)g;
 467     ec_info ei;
 468     if ((ei.c = eccurve_copy(gc->ei.c)) == 0)
 469       return (0);
 470     EC_CREATE(&ei.g);
 471     EC_COPY(&ei.g, &gc->ei.g);
 472     ei.r = MP_COPY(gc->ei.r);
 473     ei.h = MP_COPY(gc->ei.h);
 474     g = group_ec(&ei);
 475   } else
 476     g = 0;
 477   return (g);
 478 }
 479
 480 PyObject *ge_pywrap(PyObject *gobj, ge *x)
 481 {
 482   ge_pyobj *z = PyObject_New(ge_pyobj, (PyTypeObject *)gobj);
 483   z->x = x;
 484   z->g = GROUP_G(gobj);
 485   Py_INCREF(gobj);
 486   return ((PyObject *)z);
 487 }
 488
 489 static PyObject *ge_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 490 {
 491   static const char *const kwlist[] = { "x", 0 };
 492   PyObject *x;
 493   group *g;
 494   ec p = EC_INIT;
 495   mp *y = 0;
 496   ge *xx = 0;
 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 (PyString_Check(x)) {
 512     sc.buf = PyString_AS_STRING(x);
 513     sc.lim = sc.buf + PyString_GET_SIZE(x);
 514     if (G_READ(g, xx, &mptext_stringops, &sc) || sc.buf < sc.lim)
 515       VALERR("malformed group element string");
 516   } else
 517     TYERR("can't convert to group element");
 518   return (ge_pywrap((PyObject *)ty, xx));
 519 end:
 520   mp_drop(y);
 521   EC_DESTROY(&p);
 522   if (xx) G_DESTROY(g, xx);
 523   return (0);
 524 }
 525
 526 static PyObject *group_dopywrap(PyTypeObject *ty, group *g)
 527 {
 528   group_pyobj *gobj = newtype(ty, 0, g->ops->name);
 529   gobj->g = g;
 530   gobj->ty.ht_type.tp_basicsize = sizeof(ge_pyobj);
 531   gobj->ty.ht_type.tp_base = ge_pytype;
 532   Py_INCREF(group_pytype);
 533   gobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 534                                Py_TPFLAGS_BASETYPE |
 535                                Py_TPFLAGS_CHECKTYPES |
 536                                Py_TPFLAGS_HEAPTYPE);
 537   gobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 538   gobj->ty.ht_type.tp_free = 0;
 539   gobj->ty.ht_type.tp_new = ge_pynew;
 540   typeready(&gobj->ty.ht_type);
 541   return ((PyObject *)gobj);
 542 }
 543
 544 PyObject *group_pywrap(group *g)
 545 {
 546   PyTypeObject *ty;
 547
 548   if (STRCMP(G_NAME(g), ==, "prime")) ty = primegroup_pytype;
 549   else if (STRCMP(G_NAME(g), ==, "bin")) ty = bingroup_pytype;
 550   else if (STRCMP(G_NAME(g), ==, "ec")) ty = ecgroup_pytype;
 551   else abort();
 552   return (group_dopywrap(ty, g));
 553 }
 554
 555 /*----- Group elements ----------------------------------------------------*/
 556
 557 #define BINOP(name)                                                     \
 558   static PyObject *ge_py##name(PyObject *x, PyObject *y)                \
 559   {                                                                     \
 560     ge *z;                                                              \
 561     group *g;                                                           \
 562     if (!GE_PYCHECK(x) || !GE_PYCHECK(y) ||                             \
 563         (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y))))         \
 564       RETURN_NOTIMPL;                                                   \
 565     g = GE_G(x);                                                        \
 566     z = G_CREATE(g);                                                    \
 567     g->ops->name(g, z, GE_X(x), GE_X(y));                               \
 568     return (ge_pywrap(GE_GOBJ(x), z));                                  \
 569   }
 570 BINOP(mul)
 571 BINOP(div)
 572 #undef BINOP
 573
 574 #define UNOP(name)                                                      \
 575   static PyObject *gemeth_##name(PyObject *me)                          \
 576   {                                                                     \
 577     group *g;                                                           \
 578     ge *z;                                                              \
 579     g = GE_G(me);                                                       \
 580     z = G_CREATE(g);                                                    \
 581     g->ops->name(g, z, GE_X(me));                                       \
 582     return (ge_pywrap(GE_GOBJ(me), z));                                 \
 583   }
 584 UNOP(sqr)
 585 UNOP(inv)
 586 #undef UNOP
 587
 588 static PyObject *ge_pyexp(PyObject *x, PyObject *n, PyObject *m)
 589 {
 590   mp *nn;
 591   ge *z;
 592
 593   if (m != Py_None || !GE_PYCHECK(x) || (nn = getmp(n)) == 0)
 594     RETURN_NOTIMPL;
 595   z = G_CREATE(GE_G(x));
 596   G_EXP(GE_G(x), z, GE_X(x), nn);
 597   MP_DROP(nn);
 598   return (ge_pywrap(GE_GOBJ(x), z));
 599 }
 600
 601 static void ge_pydealloc(PyObject *me)
 602 {
 603   G_DESTROY(GE_G(me), GE_X(me));
 604   Py_DECREF(GE_GOBJ(me));
 605   FREEOBJ(me);
 606 }
 607
 608 static void group_pydealloc(PyObject *me)
 609 {
 610   G_DESTROYGROUP(GROUP_G(me));
 611   PyType_Type.tp_dealloc(me);
 612 }
 613
 614 static PyObject *gmexp_id(PyObject *me)
 615 {
 616   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 617   G_COPY(g, x, g->i); return (ge_pywrap(me, x));
 618 }
 619
 620 static int gmexp_fill(void *pp, PyObject  *me, PyObject *x, PyObject *m)
 621 {
 622   group_expfactor *f = pp;
 623
 624   if (!GE_PYCHECK(x) || GE_G(x) != GROUP_G(me) || (f->exp = getmp(m)) == 0)
 625     return (-1);
 626   f->base = GE_X(x);
 627   return (0);
 628 }
 629
 630 static PyObject *ge_pyrichcompare(PyObject *x, PyObject *y, int op)
 631 {
 632   int b;
 633   PyObject *rc = 0;
 634
 635   if (!GE_PYCHECK(x) || !GE_PYCHECK(y) ||
 636       (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y))))
 637     RETURN_NOTIMPL;
 638   switch (op) {
 639     case Py_EQ: b = G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
 640     case Py_NE: b = !G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
 641     default: TYERR("group elements are unordered");
 642   }
 643   rc = getbool(b);
 644 end:
 645   return (rc);
 646 }
 647
 648 static PyObject *gemeth_check(PyObject *me)
 649 {
 650   if (group_check(GE_G(me), GE_X(me))) VALERR("bad group element");
 651   RETURN_OBJ(me);
 652 end:
 653   return (0);
 654 }
 655
 656 static int ge_pynonzerop(PyObject *x)
 657   { return (!G_IDENTP(GE_G(x), GE_X(x))); }
 658
 659 static PyObject *ge_pystr(PyObject *me)
 660 {
 661   dstr d = DSTR_INIT;
 662   PyObject *rc;
 663
 664   group_writedstr(GE_G(me), GE_X(me), &d);
 665   rc = PyString_FromStringAndSize(d.buf, d.len);
 666   DDESTROY(&d);
 667   return (rc);
 668 }
 669
 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
 683 static PyObject *ge_pyint(PyObject *me)
 684 {
 685   mp *x = 0;
 686   PyObject *rc = 0;
 687   long l;
 688
 689   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 690     TYERR("can't convert to integer");
 691   if (!mp_tolong_checked(x, &l, 0)) rc = PyInt_FromLong(l);
 692   else rc = mp_topylong(x);
 693 end:
 694   mp_drop(x);
 695   return (rc);
 696 }
 697
 698 static PyObject *gemeth_toint(PyObject *me)
 699 {
 700   mp *x;
 701
 702   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 703     TYERR("can't convert to integer");
 704   return (mp_pywrap(x));
 705 end:
 706   return (0);
 707 }
 708
 709 static PyObject *gemeth_toec(PyObject *me, PyObject *arg, PyObject *kw)
 710 {
 711   static const char *const kwlist[] = { "curve", 0 };
 712   PyTypeObject *cty = 0;
 713   PyObject *rc = 0;
 714   group *g;
 715   ec_curve *c;
 716   ec p = EC_INIT;
 717
 718   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:toec", KWLIST,
 719                                    &cty)) goto end;
 720   g = GROUP_G(GE_GOBJ(me));
 721   if (cty) {
 722     if (!PyType_Check(cty) || !PyType_IsSubtype(cty, ecpt_pytype))
 723       TYERR("want subtype of catacomb.ECPt");
 724     Py_INCREF((PyObject *)cty);
 725   } else if (STRCMP(G_NAME(g), ==, "ec")) {
 726     c = eccurve_copy(((gctx_ec *)g)->ei.c);
 727     cty = (PyTypeObject *)eccurve_pywrap(0, c);
 728   } else  {
 729     cty = ecpt_pytype;
 730     Py_INCREF((PyObject *)cty);
 731   }
 732   if (G_TOEC(GE_G(me), &p, GE_X(me))) {
 733     Py_DECREF((PyObject *)cty);
 734     TYERR("can't convert to ec point");
 735   }
 736   rc = ecpt_pywrapout(cty, &p);
 737   Py_DECREF((PyObject *)cty);
 738 end:
 739   return (rc);
 740 }
 741
 742 static PyObject *gemeth_tobuf(PyObject *me)
 743 {
 744   buf b;
 745   PyObject *rc;
 746   size_t n;
 747
 748   n = GE_G(me)->noctets + 4;
 749   rc = bytestring_pywrap(0, n);
 750   buf_init(&b, PyString_AS_STRING(rc), n);
 751   G_TOBUF(GE_G(me), &b, GE_X(me));
 752   assert(BOK(&b));
 753   _PyString_Resize(&rc, BLEN(&b));
 754   return (rc);
 755 }
 756
 757 static PyObject *gemeth_toraw(PyObject *me)
 758 {
 759   buf b;
 760   PyObject *rc;
 761   size_t n;
 762
 763   n = GE_G(me)->noctets;
 764   rc = bytestring_pywrap(0, n);
 765   buf_init(&b, PyString_AS_STRING(rc), n);
 766   G_TORAW(GE_G(me), &b, GE_X(me));
 767   assert(BOK(&b));
 768   _PyString_Resize(&rc, BLEN(&b));
 769   return (rc);
 770 }
 771
 772 static PyObject *gmexp_exp(PyObject *me, void *pp, int n)
 773 {
 774   ge *z = G_CREATE(GROUP_G(me));
 775   G_MEXP(GROUP_G(me), z, pp, n);
 776   return (ge_pywrap(me, z));
 777 }
 778
 779 static void gmexp_drop(void *pp)
 780 {
 781   group_expfactor *f = pp;
 782   MP_DROP(f->exp);
 783 }
 784
 785 static PyObject *gmeth_mexp(PyObject *me, PyObject *arg)
 786 {
 787   return (mexp_common(me, arg, sizeof(group_expfactor),
 788                       gmexp_id, gmexp_fill, gmexp_exp, gmexp_drop));
 789 }
 790
 791 static PyObject *gmeth_checkgroup(PyObject *me, PyObject *arg, PyObject *kw)
 792 {
 793   static const char *const kwlist[] = { "rng", 0 };
 794   grand *r = &rand_global;
 795   const char *p;
 796
 797   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:checkgroup", KWLIST,
 798                                    convgrand, &r))
 799     goto end;
 800   if ((p = G_CHECK(GROUP_G(me), r)) != 0)
 801     VALERR(p);
 802   RETURN_OBJ(me);
 803 end:
 804   return (0);
 805 }
 806
 807 static PyObject *group_pyrichcompare(PyObject *x, PyObject *y, int op)
 808 {
 809   int b = group_samep(GROUP_G(x), GROUP_G(y));
 810   switch (op) {
 811     case Py_EQ: break;
 812     case Py_NE: b = !b;
 813     default: TYERR("can't order groups");
 814   }
 815   return (getbool(b));
 816 end:
 817   return (0);
 818 }
 819
 820 static PyObject *gemeth_frombuf(PyObject *me, PyObject *arg)
 821 {
 822   buf b;
 823   char *p;
 824   Py_ssize_t n;
 825   group *g;
 826   ge *x = 0;
 827
 828   if (!PyArg_ParseTuple(arg, "s#:frombuf", &p, &n)) return (0);
 829   g = GROUP_G(me);
 830   buf_init(&b, p, n);
 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   char *p;
 843   Py_ssize_t n;
 844   group *g;
 845   ge *x = 0;
 846
 847   if (!PyArg_ParseTuple(arg, "s#:fromraw", &p, &n)) return (0);
 848   g = GROUP_G(me);
 849   buf_init(&b, p, n);
 850   x = G_CREATE(g);
 851   if (G_FROMRAW(g, &b, x)) VALERR("invalid data");
 852   return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
 853 end:
 854   if (x) G_DESTROY(g, x);
 855   return (0);
 856 }
 857
 858 static PyObject *gemeth_fromstring(PyObject *me, PyObject *arg)
 859 {
 860   mptext_stringctx sc;
 861   char *p;
 862   Py_ssize_t n;
 863   group *g;
 864   ge *x = 0;
 865
 866   if (!PyArg_ParseTuple(arg, "s#:fromstring", &p, &n)) return (0);
 867   sc.buf = p;
 868   sc.lim = sc.buf + n;
 869   g = GROUP_G(me);
 870   x = G_CREATE(g);
 871   if (G_READ(g, x, &mptext_stringops, &sc))
 872     VALERR("bad group element string");
 873   return (Py_BuildValue("(Ns#)", ge_pywrap(me, x),
 874                         sc.buf, (Py_ssize_t)(sc.lim - sc.buf)));
 875 end:
 876   if (x) G_DESTROY(g, x);
 877   return (0);
 878 }
 879
 880 static PyObject *gmeth_parse(PyObject *me, PyObject *arg)
 881 {
 882   char *p;
 883   qd_parse qd;
 884   group *g;
 885
 886   if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
 887   qd.p = p; qd.e = 0;
 888   if ((g = group_parse(&qd)) == 0) VALERR(qd.e);
 889   return (group_pywrap(g));
 890 end:
 891   return (0);
 892 }
 893
 894 static PyObject *geget_group(PyObject *me, void *hunoz)
 895   { RETURN_OBJ(GE_GOBJ(me)); }
 896
 897 static PyObject *gget_nbits(PyObject *me, void *hunoz)
 898   { return (PyInt_FromLong(GROUP_G(me)->nbits)); }
 899
 900 static PyObject *gget_noctets(PyObject *me, void *hunoz)
 901   { return (PyInt_FromLong(GROUP_G(me)->noctets)); }
 902
 903 static PyObject *gget_i(PyObject *me, void *hunoz)
 904 {
 905   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 906   G_COPY(g, x, g->i); return (ge_pywrap(me, x));
 907 }
 908
 909 static PyObject *gget_g(PyObject *me, void *hunoz)
 910 {
 911   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 912   G_COPY(g, x, g->g); return (ge_pywrap(me, x));
 913 }
 914
 915 static long ge_pyhash(PyObject *me)
 916 {
 917   buf b;
 918   size_t sz = GE_G(me)->noctets + 4;
 919   uint32 h = 0xf672c776 + GE_G(me)->ops->ty;
 920   octet *p = xmalloc(sz);
 921   buf_init(&b, p, sz);
 922   G_TOBUF(GE_G(me), &b, GE_X(me));
 923   assert(BOK(&b));
 924   h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
 925   xfree(p);
 926   return (h % LONG_MAX);
 927 }
 928
 929 static PyObject *gget_r(PyObject *me, void *hunoz)
 930   { return (mp_pywrap(MP_COPY(GROUP_G(me)->r))); }
 931
 932 static PyObject *gget_h(PyObject *me, void *hunoz)
 933   { return (mp_pywrap(MP_COPY(GROUP_G(me)->h))); }
 934
 935 static const PyGetSetDef ge_pygetset[] = {
 936 #define GETSETNAME(op, name) ge##op##_##name
 937   GET   (group,         "X.group -> group containing X")
 938 #undef GETSETNAME
 939   { 0 }
 940 };
 941
 942 static const PyMethodDef ge_pymethods[] = {
 943 #define METHNAME(name) gemeth_##name
 944   NAMETH(inv,           "X.inv() -> inverse element of X")
 945   NAMETH(sqr,           "X.sqr() -> X^2 = X * X")
 946   NAMETH(check,         "X.check() -> check X really belongs to its group")
 947   NAMETH(toint,         "X.toint() -> X converted to an integer")
 948   KWMETH(toec,          "X.toec([curve = ECPt]) -> "
 949                                        "X converted to elliptic curve point")
 950   NAMETH(tobuf,         "X.tobuf() -> X in buffer representation")
 951   NAMETH(toraw,         "X.toraw() -> X in raw representation")
 952   CMTH  (frombuf,       "frombuf(BUF) -> X, REST")
 953   CMTH  (fromraw,       "fromraw(BUF) -> X, REST")
 954   CMTH  (fromstring,    "fromstring(STR) -> X, REST")
 955 #undef METHNAME
 956   { 0 }
 957 };
 958
 959 static const PyNumberMethods ge_pynumber = {
 960   0,                                    /* @nb_add@ */
 961   0,                                    /* @nb_subtract@ */
 962   ge_pymul,                             /* @nb_multiply@ */
 963   ge_pydiv,                             /* @nb_divide@ */
 964   0,                                    /* @nb_remainder@ */
 965   0,                                    /* @nb_divmod@ */
 966   ge_pyexp,                             /* @nb_power@ */
 967   0,                                    /* @nb_negative@ */
 968   0,                                    /* @nb_positive@ */
 969   0,                                    /* @nb_absolute@ */
 970   ge_pynonzerop,                        /* @nb_nonzero@ */
 971   0,                                    /* @nb_invert@ */
 972   0,                                    /* @nb_lshift@ */
 973   0,                                    /* @nb_rshift@ */
 974   0,                                    /* @nb_and@ */
 975   0,                                    /* @nb_xor@ */
 976   0,                                    /* @nb_or@ */
 977   0,                                    /* @nb_coerce@ */
 978   ge_pyint,                             /* @nb_int@ */
 979   ge_pylong,                            /* @nb_long@ */
 980   0 /* meaningless */,                  /* @nb_float@ */
 981   0,                                    /* @nb_oct@ */
 982   0,                                    /* @nb_hex@ */
 983
 984   0,                                    /* @nb_inplace_add@ */
 985   0,                                    /* @nb_inplace_subtract@ */
 986   0,                                    /* @nb_inplace_multiply@ */
 987   0,                                    /* @nb_inplace_divide@ */
 988   0,                                    /* @nb_inplace_remainder@ */
 989   0,                                    /* @nb_inplace_power@ */
 990   0,                                    /* @nb_inplace_lshift@ */
 991   0,                                    /* @nb_inplace_rshift@ */
 992   0,                                    /* @nb_inplace_and@ */
 993   0,                                    /* @nb_inplace_xor@ */
 994   0,                                    /* @nb_inplace_or@ */
 995
 996   0,                                    /* @nb_floor_divide@ */
 997   ge_pydiv,                             /* @nb_true_divide@ */
 998   0,                                    /* @nb_inplace_floor_divide@ */
 999   0,                                    /* @nb_inplace_true_divide@ */
1000 };
1001
1002 static const PyTypeObject ge_pytype_skel = {
1003   PyObject_HEAD_INIT(0) 0,              /* Header */
1004   "GE",                                 /* @tp_name@ */
1005   sizeof(ge_pyobj),                     /* @tp_basicsize@ */
1006   0,                                    /* @tp_itemsize@ */
1007
1008   ge_pydealloc,                         /* @tp_dealloc@ */
1009   0,                                    /* @tp_print@ */
1010   0,                                    /* @tp_getattr@ */
1011   0,                                    /* @tp_setattr@ */
1012   0,                                    /* @tp_compare@ */
1013   0,                                    /* @tp_repr@ */
1014   PYNUMBER(ge),                         /* @tp_as_number@ */
1015   0,                                    /* @tp_as_sequence@ */
1016   0,                                    /* @tp_as_mapping@ */
1017   ge_pyhash,                            /* @tp_hash@ */
1018   0,                                    /* @tp_call@ */
1019   ge_pystr,                             /* @tp_str@ */
1020   0,                                    /* @tp_getattro@ */
1021   0,                                    /* @tp_setattro@ */
1022   0,                                    /* @tp_as_buffer@ */
1023   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1024     Py_TPFLAGS_CHECKTYPES |
1025     Py_TPFLAGS_BASETYPE,
1026
1027   /* @tp_doc@ */
1028   "Group elements, abstract base class.",
1029
1030   0,                                    /* @tp_traverse@ */
1031   0,                                    /* @tp_clear@ */
1032   ge_pyrichcompare,                     /* @tp_richcompare@ */
1033   0,                                    /* @tp_weaklistoffset@ */
1034   0,                                    /* @tp_iter@ */
1035   0,                                    /* @tp_iternext@ */
1036   PYMETHODS(ge),                        /* @tp_methods@ */
1037   0,                                    /* @tp_members@ */
1038   PYGETSET(ge),                         /* @tp_getset@ */
1039   0,                                    /* @tp_base@ */
1040   0,                                    /* @tp_dict@ */
1041   0,                                    /* @tp_descr_get@ */
1042   0,                                    /* @tp_descr_set@ */
1043   0,                                    /* @tp_dictoffset@ */
1044   0,                                    /* @tp_init@ */
1045   PyType_GenericAlloc,                  /* @tp_alloc@ */
1046   abstract_pynew,                       /* @tp_new@ */
1047   0,                                    /* @tp_free@ */
1048   0                                     /* @tp_is_gc@ */
1049 };
1050
1051 static const PyGetSetDef group_pygetset[] = {
1052 #define GETSETNAME(op, name) g##op##_##name
1053   GET   (noctets,       "G.noctets -> size in octets of element")
1054   GET   (nbits,         "G.nbits -> size in bits of element")
1055   GET   (i,             "G.i -> group identity")
1056   GET   (g,             "G.g -> group generator")
1057   GET   (r,             "G.r -> group order")
1058   GET   (h,             "G.h -> group cofactor")
1059 #undef GETSETNAME
1060   { 0 }
1061 };
1062
1063 static const PyMethodDef group_pymethods[] = {
1064 #define METHNAME(name) gmeth_##name
1065   METH  (mexp,        "G.mexp([(X0, N0), (X1, N1), ...]) -> X0^N0 X1^N1 ...")
1066   KWMETH(checkgroup,    "G.checkgroup([rng = rand]): check group is good")
1067   SMTH  (parse,         "parse(STR) -> G, REST")
1068 #undef METHNAME
1069   { 0 }
1070 };
1071
1072 static const PyTypeObject group_pytype_skel = {
1073   PyObject_HEAD_INIT(0) 0,              /* Header */
1074   "Group",                              /* @tp_name@ */
1075   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1076   0,                                    /* @tp_itemsize@ */
1077
1078   group_pydealloc,                      /* @tp_dealloc@ */
1079   0,                                    /* @tp_print@ */
1080   0,                                    /* @tp_getattr@ */
1081   0,                                    /* @tp_setattr@ */
1082   0,                                    /* @tp_compare@ */
1083   0,                                    /* @tp_repr@ */
1084   0,                                    /* @tp_as_number@ */
1085   0,                                    /* @tp_as_sequence@ */
1086   0,                                    /* @tp_as_mapping@ */
1087   0,                                    /* @tp_hash@ */
1088   0,                                    /* @tp_call@ */
1089   0,                                    /* @tp_str@ */
1090   0,                                    /* @tp_getattro@ */
1091   0,                                    /* @tp_setattro@ */
1092   0,                                    /* @tp_as_buffer@ */
1093   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1094     Py_TPFLAGS_BASETYPE,
1095
1096   /* @tp_doc@ */
1097   "Abstract base class for groups.",
1098
1099   0,                                    /* @tp_traverse@ */
1100   0,                                    /* @tp_clear@ */
1101   group_pyrichcompare,                  /* @tp_richcompare@ */
1102   0,                                    /* @tp_weaklistoffset@ */
1103   0,                                    /* @tp_iter@ */
1104   0,                                    /* @tp_iternext@ */
1105   PYMETHODS(group),                     /* @tp_methods@ */
1106   0,                                    /* @tp_members@ */
1107   PYGETSET(group),                      /* @tp_getset@ */
1108   0,                                    /* @tp_base@ */
1109   0,                                    /* @tp_dict@ */
1110   0,                                    /* @tp_descr_get@ */
1111   0,                                    /* @tp_descr_set@ */
1112   0,                                    /* @tp_dictoffset@ */
1113   0,                                    /* @tp_init@ */
1114   PyType_GenericAlloc,                  /* @tp_alloc@ */
1115   abstract_pynew,                       /* @tp_new@ */
1116   0,                                    /* @tp_free@ */
1117   0                                     /* @tp_is_gc@ */
1118 };
1119
1120 static PyObject *pgget_info(PyObject *me, void *hunoz)
1121 {
1122   gprime_param dp;
1123   gctx_prime *gg = (gctx_prime *)GROUP_G(me);
1124   dp.p = MP_COPY(gg->mm.m);
1125   dp.q = MP_COPY(gg->g.r);
1126   dp.g = mpmont_reduce(&gg->mm, MP_NEW, gg->gen.x);
1127   return (fginfo_pywrap(&dp, dhinfo_pytype));
1128 }
1129
1130 static const PyGetSetDef primegroup_pygetset[] = {
1131 #define GETSETNAME(op, name) pg##op##_##name
1132   GET   (info,          "G.info -> information about the group")
1133 #undef GETSETNAME
1134   { 0 }
1135 };
1136
1137 static PyObject *primegroup_pynew(PyTypeObject *ty,
1138                                   PyObject *arg, PyObject *kw)
1139 {
1140   PyObject *i;
1141   static const char *const kwlist[] = { "info", 0 };
1142
1143   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1144                                    dhinfo_pytype, &i))
1145     return (0);
1146   return (group_dopywrap(ty, group_prime(FGINFO_DP(i))));
1147 }
1148
1149 static const PyTypeObject primegroup_pytype_skel = {
1150   PyObject_HEAD_INIT(0) 0,              /* Header */
1151   "PrimeGroup",                         /* @tp_name@ */
1152   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1153   0,                                    /* @tp_itemsize@ */
1154
1155   group_pydealloc,                      /* @tp_dealloc@ */
1156   0,                                    /* @tp_print@ */
1157   0,                                    /* @tp_getattr@ */
1158   0,                                    /* @tp_setattr@ */
1159   0,                                    /* @tp_compare@ */
1160   0,                                    /* @tp_repr@ */
1161   0,                                    /* @tp_as_number@ */
1162   0,                                    /* @tp_as_sequence@ */
1163   0,                                    /* @tp_as_mapping@ */
1164   0,                                    /* @tp_hash@ */
1165   0,                                    /* @tp_call@ */
1166   0,                                    /* @tp_str@ */
1167   0,                                    /* @tp_getattro@ */
1168   0,                                    /* @tp_setattro@ */
1169   0,                                    /* @tp_as_buffer@ */
1170   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1171     Py_TPFLAGS_BASETYPE,
1172
1173   /* @tp_doc@ */
1174   "PrimeGroup(INFO): subgroups of prime fields.",
1175
1176   0,                                    /* @tp_traverse@ */
1177   0,                                    /* @tp_clear@ */
1178   0,                                    /* @tp_richcompare@ */
1179   0,                                    /* @tp_weaklistoffset@ */
1180   0,                                    /* @tp_iter@ */
1181   0,                                    /* @tp_iternext@ */
1182   0,                                    /* @tp_methods@ */
1183   0,                                    /* @tp_members@ */
1184   PYGETSET(primegroup),                 /* @tp_getset@ */
1185   0,                                    /* @tp_base@ */
1186   0,                                    /* @tp_dict@ */
1187   0,                                    /* @tp_descr_get@ */
1188   0,                                    /* @tp_descr_set@ */
1189   0,                                    /* @tp_dictoffset@ */
1190   0,                                    /* @tp_init@ */
1191   PyType_GenericAlloc,                  /* @tp_alloc@ */
1192   primegroup_pynew,                     /* @tp_new@ */
1193   0,                                    /* @tp_free@ */
1194   0                                     /* @tp_is_gc@ */
1195 };
1196
1197 static PyObject *bgget_info(PyObject *me, void *hunoz)
1198 {
1199   gbin_param dp;
1200   gctx_bin *gg = (gctx_bin *)GROUP_G(me);
1201   dp.p = MP_COPY(gg->r.p);
1202   dp.q = MP_COPY(gg->g.r);
1203   dp.g = MP_COPY(gg->gen.x);
1204   return (fginfo_pywrap(&dp, bindhinfo_pytype));
1205 }
1206
1207 static const PyGetSetDef bingroup_pygetset[] = {
1208 #define GETSETNAME(op, name) bg##op##_##name
1209   GET   (info,          "G.info -> information about the group")
1210 #undef GETSETNAME
1211   { 0 }
1212 };
1213
1214 static PyObject *bingroup_pynew(PyTypeObject *ty,
1215                                 PyObject *arg, PyObject *kw)
1216 {
1217   PyObject *i;
1218   static const char *const kwlist[] = { "info", 0 };
1219
1220   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1221                                    bindhinfo_pytype, &i))
1222     return (0);
1223   return (group_dopywrap(ty, group_binary(FGINFO_DP(i))));
1224 }
1225
1226 static const PyTypeObject bingroup_pytype_skel = {
1227   PyObject_HEAD_INIT(0) 0,              /* Header */
1228   "BinGroup",                           /* @tp_name@ */
1229   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1230   0,                                    /* @tp_itemsize@ */
1231
1232   group_pydealloc,                      /* @tp_dealloc@ */
1233   0,                                    /* @tp_print@ */
1234   0,                                    /* @tp_getattr@ */
1235   0,                                    /* @tp_setattr@ */
1236   0,                                    /* @tp_compare@ */
1237   0,                                    /* @tp_repr@ */
1238   0,                                    /* @tp_as_number@ */
1239   0,                                    /* @tp_as_sequence@ */
1240   0,                                    /* @tp_as_mapping@ */
1241   0,                                    /* @tp_hash@ */
1242   0,                                    /* @tp_call@ */
1243   0,                                    /* @tp_str@ */
1244   0,                                    /* @tp_getattro@ */
1245   0,                                    /* @tp_setattro@ */
1246   0,                                    /* @tp_as_buffer@ */
1247   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1248     Py_TPFLAGS_BASETYPE,
1249
1250   /* @tp_doc@ */
1251   "BinGroup(INFO): subgroups of binary fields.",
1252
1253   0,                                    /* @tp_traverse@ */
1254   0,                                    /* @tp_clear@ */
1255   0,                                    /* @tp_richcompare@ */
1256   0,                                    /* @tp_weaklistoffset@ */
1257   0,                                    /* @tp_iter@ */
1258   0,                                    /* @tp_iternext@ */
1259   0,                                    /* @tp_methods@ */
1260   0,                                    /* @tp_members@ */
1261   PYGETSET(bingroup),                   /* @tp_getset@ */
1262   0,                                    /* @tp_base@ */
1263   0,                                    /* @tp_dict@ */
1264   0,                                    /* @tp_descr_get@ */
1265   0,                                    /* @tp_descr_set@ */
1266   0,                                    /* @tp_dictoffset@ */
1267   0,                                    /* @tp_init@ */
1268   PyType_GenericAlloc,                  /* @tp_alloc@ */
1269   bingroup_pynew,                       /* @tp_new@ */
1270   0,                                    /* @tp_free@ */
1271   0                                     /* @tp_is_gc@ */
1272 };
1273
1274 static PyObject *egget_info(PyObject *me, void *hunoz)
1275 {
1276   ec_info ei;
1277   gctx_ec *gg = (gctx_ec *)GROUP_G(me);
1278
1279   ecinfo_copy(&ei, &gg->ei);
1280   return (ecinfo_pywrap(&ei));
1281 }
1282
1283 static const PyGetSetDef ecgroup_pygetset[] = {
1284 #define GETSETNAME(op, name) eg##op##_##name
1285   GET   (info,          "G.info -> information about the group")
1286 #undef GETSETNAME
1287   { 0 }
1288 };
1289
1290 static PyObject *ecgroup_pynew(PyTypeObject *ty,
1291                                PyObject *arg, PyObject *kw)
1292 {
1293   PyObject *i;
1294   ec_info ei;
1295   static const char *const kwlist[] = { "info", 0 };
1296
1297   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1298                                    ecinfo_pytype, &i))
1299     return (0);
1300   ecinfo_copy(&ei, ECINFO_EI(i));
1301   return (group_dopywrap(ty, group_ec(&ei)));
1302 }
1303
1304 static const PyTypeObject ecgroup_pytype_skel = {
1305   PyObject_HEAD_INIT(0) 0,              /* Header */
1306   "ECGroup",                            /* @tp_name@ */
1307   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1308   0,                                    /* @tp_itemsize@ */
1309
1310   group_pydealloc,                      /* @tp_dealloc@ */
1311   0,                                    /* @tp_print@ */
1312   0,                                    /* @tp_getattr@ */
1313   0,                                    /* @tp_setattr@ */
1314   0,                                    /* @tp_compare@ */
1315   0,                                    /* @tp_repr@ */
1316   0,                                    /* @tp_as_number@ */
1317   0,                                    /* @tp_as_sequence@ */
1318   0,                                    /* @tp_as_mapping@ */
1319   0,                                    /* @tp_hash@ */
1320   0,                                    /* @tp_call@ */
1321   0,                                    /* @tp_str@ */
1322   0,                                    /* @tp_getattro@ */
1323   0,                                    /* @tp_setattro@ */
1324   0,                                    /* @tp_as_buffer@ */
1325   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1326     Py_TPFLAGS_BASETYPE,
1327
1328   /* @tp_doc@ */
1329   "ECGroup(INFO): elliptic curve groups.",
1330
1331   0,                                    /* @tp_traverse@ */
1332   0,                                    /* @tp_clear@ */
1333   0,                                    /* @tp_richcompare@ */
1334   0,                                    /* @tp_weaklistoffset@ */
1335   0,                                    /* @tp_iter@ */
1336   0,                                    /* @tp_iternext@ */
1337   0,                                    /* @tp_methods@ */
1338   0,                                    /* @tp_members@ */
1339   PYGETSET(ecgroup),                    /* @tp_getset@ */
1340   0,                                    /* @tp_base@ */
1341   0,                                    /* @tp_dict@ */
1342   0,                                    /* @tp_descr_get@ */
1343   0,                                    /* @tp_descr_set@ */
1344   0,                                    /* @tp_dictoffset@ */
1345   0,                                    /* @tp_init@ */
1346   PyType_GenericAlloc,                  /* @tp_alloc@ */
1347   ecgroup_pynew,                        /* @tp_new@ */
1348   0,                                    /* @tp_free@ */
1349   0                                     /* @tp_is_gc@ */
1350 };
1351
1352 /*----- Global stuff ------------------------------------------------------*/
1353
1354 void group_pyinit(void)
1355 {
1356   INITTYPE(fginfo, root);
1357   INITTYPE(dhinfo, fginfo);
1358   INITTYPE(bindhinfo, dhinfo);
1359   INITTYPE(ge, root);
1360   INITTYPE(group, type);
1361   INITTYPE(primegroup, group);
1362   INITTYPE(bingroup, group);
1363   INITTYPE(ecgroup, group);
1364 }
1365
1366 static const char *grp_namefn(const void *p)
1367   { const pentry *pt = p; return (pt->name); }
1368
1369 static int grp_ixfn(const pentry *tab, const pentry *pt)
1370 {
1371   int i;
1372
1373   for (i = 0; tab[i].name; i++)
1374     if (tab[i].data == pt->data) return (i);
1375   return (-1);
1376 }
1377 static int pgrp_ixfn(const void *p) { return (grp_ixfn(ptab, p)); }
1378 static int bgrp_ixfn(const void *p) { return (grp_ixfn(bintab, p)); }
1379
1380 static PyObject *grp_valfn(const pentry *tab, PyTypeObject *ty, int i)
1381 {
1382   gprime_param gp;
1383
1384   dh_infofromdata(&gp, tab[i].data);
1385   return (fginfo_pywrap(&gp, ty));
1386 }
1387 static PyObject *pgrp_valfn(int i)
1388   { return (grp_valfn(ptab, dhinfo_pytype, i)); }
1389 static PyObject *bgrp_valfn(int i)
1390   { return (grp_valfn(bintab, bindhinfo_pytype, i)); }
1391
1392 void group_pyinsert(PyObject *mod)
1393 {
1394   INSERT("FGInfo", fginfo_pytype);
1395   INSERT("DHInfo", dhinfo_pytype);
1396   INSERT("BinDHInfo", bindhinfo_pytype);
1397   INSERT("GE", ge_pytype);
1398   INSERT("Group", group_pytype);
1399   INSERT("PrimeGroup", primegroup_pytype);
1400   INSERT("BinGroup", bingroup_pytype);
1401   INSERT("ECGroup", ecgroup_pytype);
1402   INSERT("primegroups", make_grouptab(ptab, sizeof(*ptab),
1403                                       grp_namefn, pgrp_ixfn, pgrp_valfn));
1404   INSERT("bingroups", make_grouptab(bintab, sizeof(*bintab),
1405                                     grp_namefn, bgrp_ixfn, bgrp_valfn));
1406 }
1407
1408 /*----- That's all, folks -------------------------------------------------*/