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   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 = getmp(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 static PyObject *ge_pylong(PyObject *me)
 670 {
 671   mp *x = 0;
 672   PyObject *rc = 0;
 673
 674   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 675     TYERR("can't convert to integer");
 676   rc = mp_topylong(x);
 677 end:
 678   mp_drop(x);
 679   return (rc);
 680 }
 681
 682 static PyObject *ge_pyint(PyObject *me)
 683 {
 684   mp *x = 0;
 685   PyObject *rc = 0;
 686   long l;
 687
 688   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 689     TYERR("can't convert to integer");
 690   if (!mp_tolong_checked(x, &l, 0)) rc = PyInt_FromLong(l);
 691   else rc = mp_topylong(x);
 692 end:
 693   mp_drop(x);
 694   return (rc);
 695 }
 696
 697 static PyObject *gemeth_toint(PyObject *me)
 698 {
 699   mp *x;
 700
 701   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 702     TYERR("can't convert to integer");
 703   return (mp_pywrap(x));
 704 end:
 705   return (0);
 706 }
 707
 708 static PyObject *gemeth_toec(PyObject *me, PyObject *arg, PyObject *kw)
 709 {
 710   static const char *const kwlist[] = { "curve", 0 };
 711   PyTypeObject *cty = 0;
 712   PyObject *rc = 0;
 713   group *g;
 714   ec_curve *c;
 715   ec p = EC_INIT;
 716
 717   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:toec", KWLIST,
 718                                    &cty)) goto end;
 719   g = GROUP_G(GE_GOBJ(me));
 720   if (cty) {
 721     if (!PyType_Check(cty) || !PyType_IsSubtype(cty, ecpt_pytype))
 722       TYERR("want subtype of catacomb.ECPt");
 723     Py_INCREF((PyObject *)cty);
 724   } else if (STRCMP(G_NAME(g), ==, "ec")) {
 725     c = eccurve_copy(((gctx_ec *)g)->ei.c);
 726     cty = (PyTypeObject *)eccurve_pywrap(0, c);
 727   } else  {
 728     cty = ecpt_pytype;
 729     Py_INCREF((PyObject *)cty);
 730   }
 731   if (G_TOEC(GE_G(me), &p, GE_X(me))) {
 732     Py_DECREF((PyObject *)cty);
 733     TYERR("can't convert to ec point");
 734   }
 735   rc = ecpt_pywrapout(cty, &p);
 736   Py_DECREF((PyObject *)cty);
 737 end:
 738   return (rc);
 739 }
 740
 741 static PyObject *gemeth_tobuf(PyObject *me)
 742 {
 743   buf b;
 744   PyObject *rc;
 745   size_t n;
 746
 747   n = GE_G(me)->noctets + 4;
 748   rc = bytestring_pywrap(0, n);
 749   buf_init(&b, BIN_PTR(rc), n);
 750   G_TOBUF(GE_G(me), &b, GE_X(me));
 751   assert(BOK(&b));
 752   BIN_SETLEN(rc, BLEN(&b));
 753   return (rc);
 754 }
 755
 756 static PyObject *gemeth_toraw(PyObject *me)
 757 {
 758   buf b;
 759   PyObject *rc;
 760   size_t n;
 761
 762   n = GE_G(me)->noctets;
 763   rc = bytestring_pywrap(0, n);
 764   buf_init(&b, BIN_PTR(rc), n);
 765   G_TORAW(GE_G(me), &b, GE_X(me));
 766   assert(BOK(&b));
 767   BIN_SETLEN(rc, BLEN(&b));
 768   return (rc);
 769 }
 770
 771 static PyObject *gmexp_exp(PyObject *me, void *pp, int n)
 772 {
 773   ge *z = G_CREATE(GROUP_G(me));
 774   G_MEXP(GROUP_G(me), z, pp, n);
 775   return (ge_pywrap(me, z));
 776 }
 777
 778 static void gmexp_drop(void *pp)
 779 {
 780   group_expfactor *f = pp;
 781   MP_DROP(f->exp);
 782 }
 783
 784 static PyObject *gmeth_mexp(PyObject *me, PyObject *arg)
 785 {
 786   return (mexp_common(me, arg, sizeof(group_expfactor),
 787                       gmexp_id, gmexp_fill, gmexp_exp, gmexp_drop));
 788 }
 789
 790 static PyObject *gmeth_checkgroup(PyObject *me, PyObject *arg, PyObject *kw)
 791 {
 792   static const char *const kwlist[] = { "rng", 0 };
 793   grand *r = &rand_global;
 794   const char *p;
 795
 796   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:checkgroup", KWLIST,
 797                                    convgrand, &r))
 798     goto end;
 799   if ((p = G_CHECK(GROUP_G(me), r)) != 0)
 800     VALERR(p);
 801   RETURN_OBJ(me);
 802 end:
 803   return (0);
 804 }
 805
 806 static PyObject *group_pyrichcompare(PyObject *x, PyObject *y, int op)
 807 {
 808   int b = group_samep(GROUP_G(x), GROUP_G(y));
 809   switch (op) {
 810     case Py_EQ: break;
 811     case Py_NE: b = !b;
 812     default: TYERR("can't order groups");
 813   }
 814   return (getbool(b));
 815 end:
 816   return (0);
 817 }
 818
 819 static PyObject *gemeth_frombuf(PyObject *me, PyObject *arg)
 820 {
 821   buf b;
 822   struct bin in;
 823   group *g;
 824   ge *x = 0;
 825
 826   if (!PyArg_ParseTuple(arg, "O&:frombuf", convbin, &in)) return (0);
 827   g = GROUP_G(me);
 828   buf_init(&b, (/*unconst*/ void *)in.p, in.sz);
 829   x = G_CREATE(g);
 830   if (G_FROMBUF(g, &b, x)) VALERR("invalid data");
 831   return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
 832 end:
 833   if (x) G_DESTROY(g, x);
 834   return (0);
 835 }
 836
 837 static PyObject *gemeth_fromraw(PyObject *me, PyObject *arg)
 838 {
 839   buf b;
 840   struct bin in;
 841   group *g;
 842   ge *x = 0;
 843
 844   if (!PyArg_ParseTuple(arg, "O&:fromraw", convbin, &in)) return (0);
 845   g = GROUP_G(me);
 846   buf_init(&b, (/*unconst*/ void *)in.p, in.sz);
 847   x = G_CREATE(g);
 848   if (G_FROMRAW(g, &b, x)) VALERR("invalid data");
 849   return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
 850 end:
 851   if (x) G_DESTROY(g, x);
 852   return (0);
 853 }
 854
 855 static PyObject *gemeth_fromstring(PyObject *me, PyObject *arg)
 856 {
 857   mptext_stringctx sc;
 858   char *p;
 859   Py_ssize_t n;
 860   group *g;
 861   ge *x = 0;
 862
 863   if (!PyArg_ParseTuple(arg, "s#:fromstring", &p, &n)) return (0);
 864   sc.buf = p;
 865   sc.lim = sc.buf + n;
 866   g = GROUP_G(me);
 867   x = G_CREATE(g);
 868   if (G_READ(g, x, &mptext_stringops, &sc))
 869     VALERR("bad group element string");
 870   return (Py_BuildValue("(Ns#)", ge_pywrap(me, x),
 871                         sc.buf, (Py_ssize_t)(sc.lim - sc.buf)));
 872 end:
 873   if (x) G_DESTROY(g, x);
 874   return (0);
 875 }
 876
 877 static PyObject *gmeth_parse(PyObject *me, PyObject *arg)
 878 {
 879   char *p;
 880   qd_parse qd;
 881   group *g;
 882
 883   if (!PyArg_ParseTuple(arg, "s:parse", &p)) goto end;
 884   qd.p = p; qd.e = 0;
 885   if ((g = group_parse(&qd)) == 0) VALERR(qd.e);
 886   return (group_pywrap(g));
 887 end:
 888   return (0);
 889 }
 890
 891 static PyObject *geget_group(PyObject *me, void *hunoz)
 892   { RETURN_OBJ(GE_GOBJ(me)); }
 893
 894 static PyObject *gget_nbits(PyObject *me, void *hunoz)
 895   { return (PyInt_FromLong(GROUP_G(me)->nbits)); }
 896
 897 static PyObject *gget_noctets(PyObject *me, void *hunoz)
 898   { return (PyInt_FromLong(GROUP_G(me)->noctets)); }
 899
 900 static PyObject *gget_i(PyObject *me, void *hunoz)
 901 {
 902   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 903   G_COPY(g, x, g->i); return (ge_pywrap(me, x));
 904 }
 905
 906 static PyObject *gget_g(PyObject *me, void *hunoz)
 907 {
 908   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 909   G_COPY(g, x, g->g); return (ge_pywrap(me, x));
 910 }
 911
 912 static Py_hash_t ge_pyhash(PyObject *me)
 913 {
 914   buf b;
 915   size_t sz = GE_G(me)->noctets + 4;
 916   uint32 h = 0xf672c776 + GE_G(me)->ops->ty;
 917   octet *p = xmalloc(sz);
 918   buf_init(&b, p, sz);
 919   G_TOBUF(GE_G(me), &b, GE_X(me));
 920   assert(BOK(&b));
 921   h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
 922   xfree(p);
 923   return (h % LONG_MAX);
 924 }
 925
 926 static PyObject *gget_r(PyObject *me, void *hunoz)
 927   { return (mp_pywrap(MP_COPY(GROUP_G(me)->r))); }
 928
 929 static PyObject *gget_h(PyObject *me, void *hunoz)
 930   { return (mp_pywrap(MP_COPY(GROUP_G(me)->h))); }
 931
 932 static const PyGetSetDef ge_pygetset[] = {
 933 #define GETSETNAME(op, name) ge##op##_##name
 934   GET   (group,         "X.group -> group containing X")
 935 #undef GETSETNAME
 936   { 0 }
 937 };
 938
 939 static const PyMethodDef ge_pymethods[] = {
 940 #define METHNAME(name) gemeth_##name
 941   NAMETH(inv,           "X.inv() -> inverse element of X")
 942   NAMETH(sqr,           "X.sqr() -> X^2 = X * X")
 943   NAMETH(check,         "X.check() -> check X really belongs to its group")
 944   NAMETH(toint,         "X.toint() -> X converted to an integer")
 945   KWMETH(toec,          "X.toec([curve = ECPt]) -> "
 946                                        "X converted to elliptic curve point")
 947   NAMETH(tobuf,         "X.tobuf() -> X in buffer representation")
 948   NAMETH(toraw,         "X.toraw() -> X in raw representation")
 949   CMTH  (frombuf,       "frombuf(BUF) -> X, REST")
 950   CMTH  (fromraw,       "fromraw(BUF) -> X, REST")
 951   CMTH  (fromstring,    "fromstring(STR) -> X, REST")
 952 #undef METHNAME
 953   { 0 }
 954 };
 955
 956 static const PyNumberMethods ge_pynumber = {
 957   0,                                    /* @nb_add@ */
 958   0,                                    /* @nb_subtract@ */
 959   ge_pymul,                             /* @nb_multiply@ */
 960   ge_pydiv,                             /* @nb_divide@ */
 961   0,                                    /* @nb_remainder@ */
 962   0,                                    /* @nb_divmod@ */
 963   ge_pyexp,                             /* @nb_power@ */
 964   0,                                    /* @nb_negative@ */
 965   0,                                    /* @nb_positive@ */
 966   0,                                    /* @nb_absolute@ */
 967   ge_pynonzerop,                        /* @nb_nonzero@ */
 968   0,                                    /* @nb_invert@ */
 969   0,                                    /* @nb_lshift@ */
 970   0,                                    /* @nb_rshift@ */
 971   0,                                    /* @nb_and@ */
 972   0,                                    /* @nb_xor@ */
 973   0,                                    /* @nb_or@ */
 974   0,                                    /* @nb_coerce@ */
 975   ge_pyint,                             /* @nb_int@ */
 976   ge_pylong,                            /* @nb_long@ */
 977   0 /* meaningless */,                  /* @nb_float@ */
 978   0,                                    /* @nb_oct@ */
 979   0,                                    /* @nb_hex@ */
 980
 981   0,                                    /* @nb_inplace_add@ */
 982   0,                                    /* @nb_inplace_subtract@ */
 983   0,                                    /* @nb_inplace_multiply@ */
 984   0,                                    /* @nb_inplace_divide@ */
 985   0,                                    /* @nb_inplace_remainder@ */
 986   0,                                    /* @nb_inplace_power@ */
 987   0,                                    /* @nb_inplace_lshift@ */
 988   0,                                    /* @nb_inplace_rshift@ */
 989   0,                                    /* @nb_inplace_and@ */
 990   0,                                    /* @nb_inplace_xor@ */
 991   0,                                    /* @nb_inplace_or@ */
 992
 993   0,                                    /* @nb_floor_divide@ */
 994   ge_pydiv,                             /* @nb_true_divide@ */
 995   0,                                    /* @nb_inplace_floor_divide@ */
 996   0,                                    /* @nb_inplace_true_divide@ */
 997 };
 998
 999 static const PyTypeObject ge_pytype_skel = {
1000   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1001   "GE",                                 /* @tp_name@ */
1002   sizeof(ge_pyobj),                     /* @tp_basicsize@ */
1003   0,                                    /* @tp_itemsize@ */
1004
1005   ge_pydealloc,                         /* @tp_dealloc@ */
1006   0,                                    /* @tp_print@ */
1007   0,                                    /* @tp_getattr@ */
1008   0,                                    /* @tp_setattr@ */
1009   0,                                    /* @tp_compare@ */
1010   0,                                    /* @tp_repr@ */
1011   PYNUMBER(ge),                         /* @tp_as_number@ */
1012   0,                                    /* @tp_as_sequence@ */
1013   0,                                    /* @tp_as_mapping@ */
1014   ge_pyhash,                            /* @tp_hash@ */
1015   0,                                    /* @tp_call@ */
1016   ge_pystr,                             /* @tp_str@ */
1017   0,                                    /* @tp_getattro@ */
1018   0,                                    /* @tp_setattro@ */
1019   0,                                    /* @tp_as_buffer@ */
1020   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1021     Py_TPFLAGS_CHECKTYPES |
1022     Py_TPFLAGS_BASETYPE,
1023
1024   /* @tp_doc@ */
1025   "Group elements, abstract base class.",
1026
1027   0,                                    /* @tp_traverse@ */
1028   0,                                    /* @tp_clear@ */
1029   ge_pyrichcompare,                     /* @tp_richcompare@ */
1030   0,                                    /* @tp_weaklistoffset@ */
1031   0,                                    /* @tp_iter@ */
1032   0,                                    /* @tp_iternext@ */
1033   PYMETHODS(ge),                        /* @tp_methods@ */
1034   0,                                    /* @tp_members@ */
1035   PYGETSET(ge),                         /* @tp_getset@ */
1036   0,                                    /* @tp_base@ */
1037   0,                                    /* @tp_dict@ */
1038   0,                                    /* @tp_descr_get@ */
1039   0,                                    /* @tp_descr_set@ */
1040   0,                                    /* @tp_dictoffset@ */
1041   0,                                    /* @tp_init@ */
1042   PyType_GenericAlloc,                  /* @tp_alloc@ */
1043   abstract_pynew,                       /* @tp_new@ */
1044   0,                                    /* @tp_free@ */
1045   0                                     /* @tp_is_gc@ */
1046 };
1047
1048 static const PyGetSetDef group_pygetset[] = {
1049 #define GETSETNAME(op, name) g##op##_##name
1050   GET   (noctets,       "G.noctets -> size in octets of element")
1051   GET   (nbits,         "G.nbits -> size in bits of element")
1052   GET   (i,             "G.i -> group identity")
1053   GET   (g,             "G.g -> group generator")
1054   GET   (r,             "G.r -> group order")
1055   GET   (h,             "G.h -> group cofactor")
1056 #undef GETSETNAME
1057   { 0 }
1058 };
1059
1060 static const PyMethodDef group_pymethods[] = {
1061 #define METHNAME(name) gmeth_##name
1062   METH  (mexp,        "G.mexp([(X0, N0), (X1, N1), ...]) -> X0^N0 X1^N1 ...")
1063   KWMETH(checkgroup,    "G.checkgroup([rng = rand]): check group is good")
1064   SMTH  (parse,         "parse(STR) -> G, REST")
1065 #undef METHNAME
1066   { 0 }
1067 };
1068
1069 static const PyTypeObject group_pytype_skel = {
1070   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1071   "Group",                              /* @tp_name@ */
1072   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1073   0,                                    /* @tp_itemsize@ */
1074
1075   group_pydealloc,                      /* @tp_dealloc@ */
1076   0,                                    /* @tp_print@ */
1077   0,                                    /* @tp_getattr@ */
1078   0,                                    /* @tp_setattr@ */
1079   0,                                    /* @tp_compare@ */
1080   0,                                    /* @tp_repr@ */
1081   0,                                    /* @tp_as_number@ */
1082   0,                                    /* @tp_as_sequence@ */
1083   0,                                    /* @tp_as_mapping@ */
1084   0,                                    /* @tp_hash@ */
1085   0,                                    /* @tp_call@ */
1086   0,                                    /* @tp_str@ */
1087   0,                                    /* @tp_getattro@ */
1088   0,                                    /* @tp_setattro@ */
1089   0,                                    /* @tp_as_buffer@ */
1090   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1091     Py_TPFLAGS_BASETYPE,
1092
1093   /* @tp_doc@ */
1094   "Abstract base class for groups.",
1095
1096   0,                                    /* @tp_traverse@ */
1097   0,                                    /* @tp_clear@ */
1098   group_pyrichcompare,                  /* @tp_richcompare@ */
1099   0,                                    /* @tp_weaklistoffset@ */
1100   0,                                    /* @tp_iter@ */
1101   0,                                    /* @tp_iternext@ */
1102   PYMETHODS(group),                     /* @tp_methods@ */
1103   0,                                    /* @tp_members@ */
1104   PYGETSET(group),                      /* @tp_getset@ */
1105   0,                                    /* @tp_base@ */
1106   0,                                    /* @tp_dict@ */
1107   0,                                    /* @tp_descr_get@ */
1108   0,                                    /* @tp_descr_set@ */
1109   0,                                    /* @tp_dictoffset@ */
1110   0,                                    /* @tp_init@ */
1111   PyType_GenericAlloc,                  /* @tp_alloc@ */
1112   abstract_pynew,                       /* @tp_new@ */
1113   0,                                    /* @tp_free@ */
1114   0                                     /* @tp_is_gc@ */
1115 };
1116
1117 static PyObject *pgget_info(PyObject *me, void *hunoz)
1118 {
1119   gprime_param dp;
1120   gctx_prime *gg = (gctx_prime *)GROUP_G(me);
1121   dp.p = MP_COPY(gg->mm.m);
1122   dp.q = MP_COPY(gg->g.r);
1123   dp.g = mpmont_reduce(&gg->mm, MP_NEW, gg->gen.x);
1124   return (fginfo_pywrap(&dp, dhinfo_pytype));
1125 }
1126
1127 static const PyGetSetDef primegroup_pygetset[] = {
1128 #define GETSETNAME(op, name) pg##op##_##name
1129   GET   (info,          "G.info -> information about the group")
1130 #undef GETSETNAME
1131   { 0 }
1132 };
1133
1134 static PyObject *primegroup_pynew(PyTypeObject *ty,
1135                                   PyObject *arg, PyObject *kw)
1136 {
1137   PyObject *i;
1138   static const char *const kwlist[] = { "info", 0 };
1139
1140   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1141                                    dhinfo_pytype, &i))
1142     return (0);
1143   return (group_dopywrap(ty, group_prime(FGINFO_DP(i))));
1144 }
1145
1146 static const PyTypeObject primegroup_pytype_skel = {
1147   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1148   "PrimeGroup",                         /* @tp_name@ */
1149   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1150   0,                                    /* @tp_itemsize@ */
1151
1152   group_pydealloc,                      /* @tp_dealloc@ */
1153   0,                                    /* @tp_print@ */
1154   0,                                    /* @tp_getattr@ */
1155   0,                                    /* @tp_setattr@ */
1156   0,                                    /* @tp_compare@ */
1157   0,                                    /* @tp_repr@ */
1158   0,                                    /* @tp_as_number@ */
1159   0,                                    /* @tp_as_sequence@ */
1160   0,                                    /* @tp_as_mapping@ */
1161   0,                                    /* @tp_hash@ */
1162   0,                                    /* @tp_call@ */
1163   0,                                    /* @tp_str@ */
1164   0,                                    /* @tp_getattro@ */
1165   0,                                    /* @tp_setattro@ */
1166   0,                                    /* @tp_as_buffer@ */
1167   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1168     Py_TPFLAGS_BASETYPE,
1169
1170   /* @tp_doc@ */
1171   "PrimeGroup(INFO): subgroups of prime fields.",
1172
1173   0,                                    /* @tp_traverse@ */
1174   0,                                    /* @tp_clear@ */
1175   0,                                    /* @tp_richcompare@ */
1176   0,                                    /* @tp_weaklistoffset@ */
1177   0,                                    /* @tp_iter@ */
1178   0,                                    /* @tp_iternext@ */
1179   0,                                    /* @tp_methods@ */
1180   0,                                    /* @tp_members@ */
1181   PYGETSET(primegroup),                 /* @tp_getset@ */
1182   0,                                    /* @tp_base@ */
1183   0,                                    /* @tp_dict@ */
1184   0,                                    /* @tp_descr_get@ */
1185   0,                                    /* @tp_descr_set@ */
1186   0,                                    /* @tp_dictoffset@ */
1187   0,                                    /* @tp_init@ */
1188   PyType_GenericAlloc,                  /* @tp_alloc@ */
1189   primegroup_pynew,                     /* @tp_new@ */
1190   0,                                    /* @tp_free@ */
1191   0                                     /* @tp_is_gc@ */
1192 };
1193
1194 static PyObject *bgget_info(PyObject *me, void *hunoz)
1195 {
1196   gbin_param dp;
1197   gctx_bin *gg = (gctx_bin *)GROUP_G(me);
1198   dp.p = MP_COPY(gg->r.p);
1199   dp.q = MP_COPY(gg->g.r);
1200   dp.g = MP_COPY(gg->gen.x);
1201   return (fginfo_pywrap(&dp, bindhinfo_pytype));
1202 }
1203
1204 static const PyGetSetDef bingroup_pygetset[] = {
1205 #define GETSETNAME(op, name) bg##op##_##name
1206   GET   (info,          "G.info -> information about the group")
1207 #undef GETSETNAME
1208   { 0 }
1209 };
1210
1211 static PyObject *bingroup_pynew(PyTypeObject *ty,
1212                                 PyObject *arg, PyObject *kw)
1213 {
1214   PyObject *i;
1215   static const char *const kwlist[] = { "info", 0 };
1216
1217   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1218                                    bindhinfo_pytype, &i))
1219     return (0);
1220   return (group_dopywrap(ty, group_binary(FGINFO_DP(i))));
1221 }
1222
1223 static const PyTypeObject bingroup_pytype_skel = {
1224   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1225   "BinGroup",                           /* @tp_name@ */
1226   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1227   0,                                    /* @tp_itemsize@ */
1228
1229   group_pydealloc,                      /* @tp_dealloc@ */
1230   0,                                    /* @tp_print@ */
1231   0,                                    /* @tp_getattr@ */
1232   0,                                    /* @tp_setattr@ */
1233   0,                                    /* @tp_compare@ */
1234   0,                                    /* @tp_repr@ */
1235   0,                                    /* @tp_as_number@ */
1236   0,                                    /* @tp_as_sequence@ */
1237   0,                                    /* @tp_as_mapping@ */
1238   0,                                    /* @tp_hash@ */
1239   0,                                    /* @tp_call@ */
1240   0,                                    /* @tp_str@ */
1241   0,                                    /* @tp_getattro@ */
1242   0,                                    /* @tp_setattro@ */
1243   0,                                    /* @tp_as_buffer@ */
1244   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1245     Py_TPFLAGS_BASETYPE,
1246
1247   /* @tp_doc@ */
1248   "BinGroup(INFO): subgroups of binary fields.",
1249
1250   0,                                    /* @tp_traverse@ */
1251   0,                                    /* @tp_clear@ */
1252   0,                                    /* @tp_richcompare@ */
1253   0,                                    /* @tp_weaklistoffset@ */
1254   0,                                    /* @tp_iter@ */
1255   0,                                    /* @tp_iternext@ */
1256   0,                                    /* @tp_methods@ */
1257   0,                                    /* @tp_members@ */
1258   PYGETSET(bingroup),                   /* @tp_getset@ */
1259   0,                                    /* @tp_base@ */
1260   0,                                    /* @tp_dict@ */
1261   0,                                    /* @tp_descr_get@ */
1262   0,                                    /* @tp_descr_set@ */
1263   0,                                    /* @tp_dictoffset@ */
1264   0,                                    /* @tp_init@ */
1265   PyType_GenericAlloc,                  /* @tp_alloc@ */
1266   bingroup_pynew,                       /* @tp_new@ */
1267   0,                                    /* @tp_free@ */
1268   0                                     /* @tp_is_gc@ */
1269 };
1270
1271 static PyObject *egget_info(PyObject *me, void *hunoz)
1272 {
1273   ec_info ei;
1274   gctx_ec *gg = (gctx_ec *)GROUP_G(me);
1275
1276   ecinfo_copy(&ei, &gg->ei);
1277   return (ecinfo_pywrap(&ei));
1278 }
1279
1280 static const PyGetSetDef ecgroup_pygetset[] = {
1281 #define GETSETNAME(op, name) eg##op##_##name
1282   GET   (info,          "G.info -> information about the group")
1283 #undef GETSETNAME
1284   { 0 }
1285 };
1286
1287 static PyObject *ecgroup_pynew(PyTypeObject *ty,
1288                                PyObject *arg, PyObject *kw)
1289 {
1290   PyObject *i;
1291   ec_info ei;
1292   static const char *const kwlist[] = { "info", 0 };
1293
1294   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", KWLIST,
1295                                    ecinfo_pytype, &i))
1296     return (0);
1297   ecinfo_copy(&ei, ECINFO_EI(i));
1298   return (group_dopywrap(ty, group_ec(&ei)));
1299 }
1300
1301 static const PyTypeObject ecgroup_pytype_skel = {
1302   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1303   "ECGroup",                            /* @tp_name@ */
1304   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1305   0,                                    /* @tp_itemsize@ */
1306
1307   group_pydealloc,                      /* @tp_dealloc@ */
1308   0,                                    /* @tp_print@ */
1309   0,                                    /* @tp_getattr@ */
1310   0,                                    /* @tp_setattr@ */
1311   0,                                    /* @tp_compare@ */
1312   0,                                    /* @tp_repr@ */
1313   0,                                    /* @tp_as_number@ */
1314   0,                                    /* @tp_as_sequence@ */
1315   0,                                    /* @tp_as_mapping@ */
1316   0,                                    /* @tp_hash@ */
1317   0,                                    /* @tp_call@ */
1318   0,                                    /* @tp_str@ */
1319   0,                                    /* @tp_getattro@ */
1320   0,                                    /* @tp_setattro@ */
1321   0,                                    /* @tp_as_buffer@ */
1322   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1323     Py_TPFLAGS_BASETYPE,
1324
1325   /* @tp_doc@ */
1326   "ECGroup(INFO): elliptic curve groups.",
1327
1328   0,                                    /* @tp_traverse@ */
1329   0,                                    /* @tp_clear@ */
1330   0,                                    /* @tp_richcompare@ */
1331   0,                                    /* @tp_weaklistoffset@ */
1332   0,                                    /* @tp_iter@ */
1333   0,                                    /* @tp_iternext@ */
1334   0,                                    /* @tp_methods@ */
1335   0,                                    /* @tp_members@ */
1336   PYGETSET(ecgroup),                    /* @tp_getset@ */
1337   0,                                    /* @tp_base@ */
1338   0,                                    /* @tp_dict@ */
1339   0,                                    /* @tp_descr_get@ */
1340   0,                                    /* @tp_descr_set@ */
1341   0,                                    /* @tp_dictoffset@ */
1342   0,                                    /* @tp_init@ */
1343   PyType_GenericAlloc,                  /* @tp_alloc@ */
1344   ecgroup_pynew,                        /* @tp_new@ */
1345   0,                                    /* @tp_free@ */
1346   0                                     /* @tp_is_gc@ */
1347 };
1348
1349 /*----- Global stuff ------------------------------------------------------*/
1350
1351 void group_pyinit(void)
1352 {
1353   INITTYPE(fginfo, root);
1354   INITTYPE(dhinfo, fginfo);
1355   INITTYPE(bindhinfo, dhinfo);
1356   INITTYPE(ge, root);
1357   INITTYPE(group, type);
1358   INITTYPE(primegroup, group);
1359   INITTYPE(bingroup, group);
1360   INITTYPE(ecgroup, group);
1361 }
1362
1363 static const char *grp_namefn(const void *p)
1364   { const pentry *pt = p; return (pt->name); }
1365
1366 static int grp_ixfn(const pentry *tab, const pentry *pt)
1367 {
1368   int i;
1369
1370   for (i = 0; tab[i].name; i++)
1371     if (tab[i].data == pt->data) return (i);
1372   return (-1);
1373 }
1374 static int pgrp_ixfn(const void *p) { return (grp_ixfn(ptab, p)); }
1375 static int bgrp_ixfn(const void *p) { return (grp_ixfn(bintab, p)); }
1376
1377 static PyObject *grp_valfn(const pentry *tab, PyTypeObject *ty, int i)
1378 {
1379   gprime_param gp;
1380
1381   dh_infofromdata(&gp, tab[i].data);
1382   return (fginfo_pywrap(&gp, ty));
1383 }
1384 static PyObject *pgrp_valfn(int i)
1385   { return (grp_valfn(ptab, dhinfo_pytype, i)); }
1386 static PyObject *bgrp_valfn(int i)
1387   { return (grp_valfn(bintab, bindhinfo_pytype, i)); }
1388
1389 void group_pyinsert(PyObject *mod)
1390 {
1391   INSERT("FGInfo", fginfo_pytype);
1392   INSERT("DHInfo", dhinfo_pytype);
1393   INSERT("BinDHInfo", bindhinfo_pytype);
1394   INSERT("GE", ge_pytype);
1395   INSERT("Group", group_pytype);
1396   INSERT("PrimeGroup", primegroup_pytype);
1397   INSERT("BinGroup", bingroup_pytype);
1398   INSERT("ECGroup", ecgroup_pytype);
1399   INSERT("primegroups", make_grouptab(ptab, sizeof(*ptab),
1400                                       grp_namefn, pgrp_ixfn, pgrp_valfn));
1401   INSERT("bingroups", make_grouptab(bintab, sizeof(*bintab),
1402                                     grp_namefn, bgrp_ixfn, bgrp_valfn));
1403 }
1404
1405 /*----- That's all, folks -------------------------------------------------*/