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 PyObject *fginfo_pywrap(gprime_param *dp, PyTypeObject *ty)
  34 {
  35   fginfo_pyobj *z = PyObject_New(fginfo_pyobj, ty);
  36   z->dp = *dp;
  37   return ((PyObject *)z);
  38 }
  39
  40 static PyObject *fginfo_pynew(PyTypeObject *ty,
  41                               PyObject *arg, PyObject *kw)
  42 {
  43   char *kwlist[] = { "p", "r", "g", 0 };
  44   gprime_param dp = { 0 };
  45   fginfo_pyobj *z = 0;
  46
  47   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&O&:new", kwlist,
  48                                    convmp, &dp.p,
  49                                    convmp, &dp.q,
  50                                    convmp, &dp.g))
  51     goto end;
  52   z = PyObject_New(fginfo_pyobj, ty);
  53   z->dp = dp;
  54   return ((PyObject *)z);
  55 end:
  56   mp_drop(dp.p);
  57   mp_drop(dp.q);
  58   mp_drop(dp.g);
  59   return (0);
  60 }
  61
  62 static PyObject *figet_r(PyObject *me, void *hunoz)
  63   { return mp_pywrap(MP_COPY(FGINFO_DP(me)->q)); }
  64
  65 static PyObject *diget_p(PyObject *me, void *hunoz)
  66   { return mp_pywrap(MP_COPY(FGINFO_DP(me)->p)); }
  67
  68 static PyObject *diget_g(PyObject *me, void *hunoz)
  69   { return mp_pywrap(MP_COPY(FGINFO_DP(me)->g)); }
  70
  71 static PyObject *biget_p(PyObject *me, void *hunoz)
  72   { return gf_pywrap(MP_COPY(FGINFO_DP(me)->p)); }
  73
  74 static PyObject *biget_m(PyObject *me, void *hunoz)
  75   { return PyInt_FromLong(mp_octets(FGINFO_DP(me)->p) - 1); }
  76
  77 static PyObject *biget_g(PyObject *me, void *hunoz)
  78   { return gf_pywrap(MP_COPY(FGINFO_DP(me)->g)); }
  79
  80 static void fginfo_pydealloc(PyObject *me)
  81 {
  82   mp_drop(FGINFO_DP(me)->p);
  83   mp_drop(FGINFO_DP(me)->q);
  84   mp_drop(FGINFO_DP(me)->g);
  85   FREEOBJ(me);
  86 }
  87
  88 static PyObject *meth__DHInfo_generate(PyObject *me,
  89                                        PyObject *arg, PyObject *kw)
  90 {
  91   dh_param dp;
  92   unsigned ql = 0, pl;
  93   unsigned steps = 0;
  94   grand *r = &rand_global;
  95   pgev evt = { 0 };
  96   char *kwlist[] =
  97     { "class", "pbits", "qbits", "event", "rng", "nsteps", 0 };
  98   PyObject *rc = 0;
  99
 100   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&O&:generate", kwlist,
 101                                    &me, convuint, &pl, convuint, &ql,
 102                                    convpgev, &evt, convgrand, &r,
 103                                    convuint, &steps))
 104     goto end;
 105   if (dh_gen(&dp, ql, pl, steps, r, evt.proc, evt.ctx))
 106     PGENERR;
 107   rc = fginfo_pywrap(&dp, dhinfo_pytype);
 108 end:
 109   droppgev(&evt);
 110   return (rc);
 111 }
 112
 113 static PyObject *meth__DHInfo_genlimlee(PyObject *me,
 114                                         PyObject *arg, PyObject *kw)
 115 {
 116   dh_param dp;
 117   unsigned ql, pl;
 118   unsigned steps = 0;
 119   grand *r = &rand_global;
 120   pgev oe = { 0 }, ie = { 0 };
 121   int subgroupp = 1;
 122   unsigned f = 0;
 123   char *kwlist[] = { "class", "pbits", "qbits", "event", "ievent",
 124                      "rng", "nsteps", "subgroupp", 0 };
 125   size_t i, nf;
 126   mp **v = 0;
 127   PyObject *rc = 0, *vec = 0;
 128
 129   if (!PyArg_ParseTupleAndKeywords(arg, kw,
 130                                    "OO&O&|O&O&O&O&O&:genlimlee", kwlist,
 131                                    &me, convuint, &pl, convuint, &ql,
 132                                    convpgev, &oe, convpgev, &ie,
 133                                    convgrand, &r, convuint, &steps,
 134                                    convbool, &subgroupp))
 135     goto end;
 136   if (subgroupp) f |= DH_SUBGROUP;
 137   if (dh_limlee(&dp, ql, pl, f, steps, r,
 138                 oe.proc, oe.ctx, ie.proc, ie.ctx, &nf, &v))
 139     PGENERR;
 140   vec = PyList_New(nf);
 141   for (i = 0; i < nf; i++)
 142     PyList_SetItem(vec, i, mp_pywrap(v[i]));
 143   xfree(v);
 144   rc = Py_BuildValue("(NN)", fginfo_pywrap(&dp, dhinfo_pytype), vec);
 145 end:
 146   droppgev(&oe); droppgev(&ie);
 147   return (rc);
 148 }
 149
 150 static PyObject *meth__DHInfo_genkcdsa(PyObject *me,
 151                                        PyObject *arg, PyObject *kw)
 152 {
 153   dh_param dp;
 154   unsigned ql, pl;
 155   unsigned steps = 0;
 156   grand *r = &rand_global;
 157   pgev evt = { 0 };
 158   char *kwlist[] = { "class", "pbits", "qbits",
 159                      "event", "rng", "nsteps", 0 };
 160   mp *v = MP_NEW;
 161   PyObject *rc = 0;
 162
 163   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&|O&O&O&:genkcdsa", kwlist,
 164                                    &me, convuint, &pl, convuint, &ql,
 165                                    convpgev, &evt, convgrand, &r,
 166                                    convuint, &steps))
 167     goto end;
 168   if (dh_kcdsagen(&dp, ql, pl, 0, steps, r, evt.proc, evt.ctx))
 169     PGENERR;
 170   mp_div(&v, 0, dp.p, dp.q);
 171   v = mp_lsr(v, v, 1);
 172   rc = Py_BuildValue("(NN)", fginfo_pywrap(&dp, dhinfo_pytype),
 173                      mp_pywrap(v));
 174 end:
 175   droppgev(&evt);
 176   return (rc);
 177 }
 178
 179 static PyObject *meth__DHInfo_gendsa(PyObject *me,
 180                                      PyObject *arg, PyObject *kw)
 181 {
 182   dsa_param dp;
 183   unsigned ql, pl;
 184   unsigned steps = 0;
 185   dsa_seed ds;
 186   char *k;
 187   Py_ssize_t ksz;
 188   pgev evt = { 0 };
 189   char *kwlist[] =
 190     { "class", "pbits", "qbits", "seed", "event", "nsteps", 0 };
 191   PyObject *rc = 0;
 192
 193   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&s#|O&O&:gendsa", kwlist,
 194                                    &me, convuint, &pl, convuint, &ql,
 195                                    &k, &ksz, convpgev, &evt,
 196                                    convuint, &steps))
 197     goto end;
 198   if (dsa_gen(&dp, ql, pl, steps, k, ksz, &ds, evt.proc, evt.ctx))
 199     PGENERR;
 200   rc = Py_BuildValue("(NNl)", fginfo_pywrap(&dp, dhinfo_pytype),
 201                      bytestring_pywrap(ds.p, ds.sz), (long)ds.count);
 202   xfree(ds.p);
 203 end:
 204   droppgev(&evt);
 205   return (rc);
 206 }
 207
 208 static int npgroups = -1, nbingroups = -1;
 209
 210 static PyObject *namedgroups(const pentry *pp, int *ne)
 211 {
 212   int i, j;
 213   const char *p;
 214   PyObject *d, *c;
 215
 216   d = PyDict_New();
 217   for (i = 0; pp[i].name; i++) {
 218     p = pp[i].name;
 219     for (j = 0; j < i; j++) {
 220       if (pp[i].data == pp[j].data) {
 221         c = PyDict_GetItemString(d, (/*unconst*/ char *)pp[j].name);
 222         Py_INCREF(c);
 223         goto found;
 224       }
 225     }
 226     c = PyInt_FromLong(i);
 227   found:
 228     PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
 229     Py_DECREF(c);
 230   }
 231   *ne = i;
 232   return (d);
 233 }
 234
 235 static PyObject *meth__groupn(PyObject *me, PyObject *arg,
 236                               PyTypeObject *ty, const pentry *pp, int ne)
 237 {
 238   int i;
 239   gprime_param gp;
 240   PyObject *rc = 0;
 241
 242   if (!PyArg_ParseTuple(arg, "Oi:_groupn", &me, &i)) goto end;
 243   if (i < 0 || i >= ne) VALERR("group index out of range");
 244   dh_infofromdata(&gp, pp[i].data);
 245   rc = fginfo_pywrap(&gp, ty);
 246 end:
 247   return (rc);
 248 }
 249
 250 static PyObject *meth__DHInfo__groupn(PyObject *me, PyObject *arg)
 251   { return (meth__groupn(me, arg, dhinfo_pytype, ptab, npgroups)); }
 252
 253 static PyObject *meth__BinDHInfo__groupn(PyObject *me, PyObject *arg)
 254   { return (meth__groupn(me, arg, bindhinfo_pytype, bintab, nbingroups)); }
 255
 256 static PyObject *meth__parse(PyObject *me, PyObject *arg, PyTypeObject *ty,
 257                              int (*parse)(qd_parse *, gprime_param *))
 258 {
 259   qd_parse qd;
 260   char *p;
 261   gprime_param gp;
 262   PyObject *rc = 0;
 263
 264   if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
 265   qd.p = p;
 266   qd.e = 0;
 267   if (parse(&qd, &gp)) VALERR(qd.e);
 268   rc = fginfo_pywrap(&gp, ty);
 269 end:
 270   return (rc);
 271 }
 272
 273 static PyObject *meth__DHInfo_parse(PyObject *me, PyObject *arg)
 274   { return (meth__parse(me, arg, dhinfo_pytype, dh_parse)); }
 275
 276 static PyObject *meth__BinDHInfo_parse(PyObject *me, PyObject *arg)
 277   { return (meth__parse(me, arg, bindhinfo_pytype, dhbin_parse)); }
 278
 279 static PyGetSetDef fginfo_pygetset[] = {
 280 #define GETSETNAME(op, name) fi##op##_##name
 281   GET   (r,                     "I.r -> group order")
 282 #undef GETSETNAME
 283   { 0 }
 284 };
 285
 286 static PyGetSetDef dhinfo_pygetset[] = {
 287 #define GETSETNAME(op, name) di##op##_##name
 288   GET   (p,                     "I.p -> prime")
 289   GET   (g,                     "I.g -> generator")
 290 #undef GETSETNAME
 291   { 0 }
 292 };
 293
 294 static PyGetSetDef bindhinfo_pygetset[] = {
 295 #define GETSETNAME(op, name) bi##op##_##name
 296   GET   (p,                     "I.p -> irreducible polynomial")
 297   GET   (m,                     "I.m -> degree of polynomial")
 298   GET   (g,                     "I.g -> generator")
 299 #undef GETSETNAME
 300   { 0 }
 301 };
 302
 303 static PyTypeObject fginfo_pytype_skel = {
 304   PyObject_HEAD_INIT(0) 0,              /* Header */
 305   "FGInfo",                             /* @tp_name@ */
 306   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 307   0,                                    /* @tp_itemsize@ */
 308
 309   fginfo_pydealloc,                     /* @tp_dealloc@ */
 310   0,                                    /* @tp_print@ */
 311   0,                                    /* @tp_getattr@ */
 312   0,                                    /* @tp_setattr@ */
 313   0,                                    /* @tp_compare@ */
 314   0,                                    /* @tp_repr@ */
 315   0,                                    /* @tp_as_number@ */
 316   0,                                    /* @tp_as_sequence@ */
 317   0,                                    /* @tp_as_mapping@ */
 318   0,                                    /* @tp_hash@ */
 319   0,                                    /* @tp_call@ */
 320   0,                                    /* @tp_str@ */
 321   0,                                    /* @tp_getattro@ */
 322   0,                                    /* @tp_setattro@ */
 323   0,                                    /* @tp_as_buffer@ */
 324   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 325     Py_TPFLAGS_BASETYPE,
 326
 327   /* @tp_doc@ */
 328   "Abstract base class for field-group information objects.",
 329
 330   0,                                    /* @tp_traverse@ */
 331   0,                                    /* @tp_clear@ */
 332   0,                                    /* @tp_richcompare@ */
 333   0,                                    /* @tp_weaklistoffset@ */
 334   0,                                    /* @tp_iter@ */
 335   0,                                    /* @tp_iternext@ */
 336   0,                                    /* @tp_methods@ */
 337   0,                                    /* @tp_members@ */
 338   fginfo_pygetset,                      /* @tp_getset@ */
 339   0,                                    /* @tp_base@ */
 340   0,                                    /* @tp_dict@ */
 341   0,                                    /* @tp_descr_get@ */
 342   0,                                    /* @tp_descr_set@ */
 343   0,                                    /* @tp_dictoffset@ */
 344   0,                                    /* @tp_init@ */
 345   PyType_GenericAlloc,                  /* @tp_alloc@ */
 346   abstract_pynew,                       /* @tp_new@ */
 347   0,                                    /* @tp_free@ */
 348   0                                     /* @tp_is_gc@ */
 349 };
 350
 351 static PyTypeObject dhinfo_pytype_skel = {
 352   PyObject_HEAD_INIT(0) 0,              /* Header */
 353   "DHInfo",                             /* @tp_name@ */
 354   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 355   0,                                    /* @tp_itemsize@ */
 356
 357   fginfo_pydealloc,                     /* @tp_dealloc@ */
 358   0,                                    /* @tp_print@ */
 359   0,                                    /* @tp_getattr@ */
 360   0,                                    /* @tp_setattr@ */
 361   0,                                    /* @tp_compare@ */
 362   0,                                    /* @tp_repr@ */
 363   0,                                    /* @tp_as_number@ */
 364   0,                                    /* @tp_as_sequence@ */
 365   0,                                    /* @tp_as_mapping@ */
 366   0,                                    /* @tp_hash@ */
 367   0,                                    /* @tp_call@ */
 368   0,                                    /* @tp_str@ */
 369   0,                                    /* @tp_getattro@ */
 370   0,                                    /* @tp_setattro@ */
 371   0,                                    /* @tp_as_buffer@ */
 372   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 373     Py_TPFLAGS_BASETYPE,
 374
 375   /* @tp_doc@ */
 376   "Standard (integer) Diffie-Hellman group information.",
 377
 378   0,                                    /* @tp_traverse@ */
 379   0,                                    /* @tp_clear@ */
 380   0,                                    /* @tp_richcompare@ */
 381   0,                                    /* @tp_weaklistoffset@ */
 382   0,                                    /* @tp_iter@ */
 383   0,                                    /* @tp_iternext@ */
 384   0,                                    /* @tp_methods@ */
 385   0,                                    /* @tp_members@ */
 386   dhinfo_pygetset,                      /* @tp_getset@ */
 387   0,                                    /* @tp_base@ */
 388   0,                                    /* @tp_dict@ */
 389   0,                                    /* @tp_descr_get@ */
 390   0,                                    /* @tp_descr_set@ */
 391   0,                                    /* @tp_dictoffset@ */
 392   0,                                    /* @tp_init@ */
 393   PyType_GenericAlloc,                  /* @tp_alloc@ */
 394   fginfo_pynew,                         /* @tp_new@ */
 395   0,                                    /* @tp_free@ */
 396   0                                     /* @tp_is_gc@ */
 397 };
 398
 399 static PyTypeObject bindhinfo_pytype_skel = {
 400   PyObject_HEAD_INIT(0) 0,              /* Header */
 401   "BinDHInfo",                          /* @tp_name@ */
 402   sizeof(fginfo_pyobj),                 /* @tp_basicsize@ */
 403   0,                                    /* @tp_itemsize@ */
 404
 405   fginfo_pydealloc,                     /* @tp_dealloc@ */
 406   0,                                    /* @tp_print@ */
 407   0,                                    /* @tp_getattr@ */
 408   0,                                    /* @tp_setattr@ */
 409   0,                                    /* @tp_compare@ */
 410   0,                                    /* @tp_repr@ */
 411   0,                                    /* @tp_as_number@ */
 412   0,                                    /* @tp_as_sequence@ */
 413   0,                                    /* @tp_as_mapping@ */
 414   0,                                    /* @tp_hash@ */
 415   0,                                    /* @tp_call@ */
 416   0,                                    /* @tp_str@ */
 417   0,                                    /* @tp_getattro@ */
 418   0,                                    /* @tp_setattro@ */
 419   0,                                    /* @tp_as_buffer@ */
 420   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 421     Py_TPFLAGS_BASETYPE,
 422
 423   /* @tp_doc@ */
 424   "Binary-field Diffie-Hellman group information.",
 425
 426   0,                                    /* @tp_traverse@ */
 427   0,                                    /* @tp_clear@ */
 428   0,                                    /* @tp_richcompare@ */
 429   0,                                    /* @tp_weaklistoffset@ */
 430   0,                                    /* @tp_iter@ */
 431   0,                                    /* @tp_iternext@ */
 432   0,                                    /* @tp_methods@ */
 433   0,                                    /* @tp_members@ */
 434   bindhinfo_pygetset,                   /* @tp_getset@ */
 435   0,                                    /* @tp_base@ */
 436   0,                                    /* @tp_dict@ */
 437   0,                                    /* @tp_descr_get@ */
 438   0,                                    /* @tp_descr_set@ */
 439   0,                                    /* @tp_dictoffset@ */
 440   0,                                    /* @tp_init@ */
 441   PyType_GenericAlloc,                  /* @tp_alloc@ */
 442   fginfo_pynew,                         /* @tp_new@ */
 443   0,                                    /* @tp_free@ */
 444   0                                     /* @tp_is_gc@ */
 445 };
 446
 447 /*----- General utilities -------------------------------------------------*/
 448
 449 PyTypeObject *ge_pytype, *group_pytype;
 450 PyTypeObject *primegroup_pytype, *bingroup_pytype, *ecgroup_pytype;
 451
 452 group *group_copy(group *g)
 453 {
 454   if (strcmp(G_NAME(g), "prime") == 0) {
 455     gctx_prime *gc = (gctx_prime *)g;
 456     gprime_param gp;
 457     gp.g = G_TOINT(g, MP_NEW, g->g);
 458     gp.p = gc->mm.m;
 459     gp.q = gc->g.r;
 460     g = group_prime(&gp);
 461     MP_DROP(gp.g);
 462   } else if (strcmp(G_NAME(g), "bin") == 0) {
 463     gctx_bin *gc = (gctx_bin *)g;
 464     gbin_param gb;
 465     gb.g = G_TOINT(g, MP_NEW, g->g);
 466     gb.p = gc->r.p;
 467     gb.q = gc->g.r;
 468     g = group_binary(&gb);
 469     MP_DROP(gb.g);
 470   } else if (strcmp(G_NAME(g), "ec") == 0) {
 471     gctx_ec *gc = (gctx_ec *)g;
 472     ec_info ei;
 473     if ((ei.c = eccurve_copy(gc->ei.c)) == 0)
 474       return (0);
 475     EC_CREATE(&ei.g);
 476     EC_COPY(&ei.g, &gc->ei.g);
 477     ei.r = MP_COPY(gc->ei.r);
 478     ei.h = MP_COPY(gc->ei.h);
 479     g = group_ec(&ei);
 480   } else
 481     g = 0;
 482   return (g);
 483 }
 484
 485 PyObject *ge_pywrap(PyObject *gobj, ge *x)
 486 {
 487   ge_pyobj *z = PyObject_New(ge_pyobj, (PyTypeObject *)gobj);
 488   z->x = x;
 489   z->g = GROUP_G(gobj);
 490   Py_INCREF(gobj);
 491   return ((PyObject *)z);
 492 }
 493
 494 static PyObject *ge_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 495 {
 496   char *kwlist[] = { "x", 0 };
 497   PyObject *x;
 498   group *g;
 499   ec p = EC_INIT;
 500   mp *y = 0;
 501   ge *xx = 0;
 502   mptext_stringctx sc;
 503
 504   g = GROUP_G(ty);
 505   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O:new", kwlist, &x)) goto end;
 506   xx = G_CREATE(g);
 507   if (ECPT_PYCHECK(x)) {
 508     getecptout(&p, x);
 509     if (G_FROMEC(g, xx, &p))
 510       TYERR("can't convert from elliptic curve point");
 511     EC_DESTROY(&p);
 512   } else if ((y = tomp(x)) != 0) {
 513     if (G_FROMINT(g, xx, y))
 514       TYERR("can't convert from integer");
 515     MP_DROP(y);
 516   } else if (PyString_Check(x)) {
 517     sc.buf = PyString_AS_STRING(x);
 518     sc.lim = sc.buf + PyString_GET_SIZE(x);
 519     if (G_READ(g, xx, &mptext_stringops, &sc) || sc.buf < sc.lim)
 520       VALERR("malformed group element string");
 521   } else
 522     TYERR("can't convert to group element");
 523   return (ge_pywrap((PyObject *)ty, xx));
 524 end:
 525   mp_drop(y);
 526   EC_DESTROY(&p);
 527   if (xx) G_DESTROY(g, xx);
 528   return (0);
 529 }
 530
 531 static PyObject *group_dopywrap(PyTypeObject *ty, group *g)
 532 {
 533   group_pyobj *gobj = newtype(ty, 0, g->ops->name);
 534   gobj->g = g;
 535   gobj->ty.ht_type.tp_basicsize = sizeof(ge_pyobj);
 536   gobj->ty.ht_type.tp_base = ge_pytype;
 537   Py_INCREF(group_pytype);
 538   gobj->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 539                                Py_TPFLAGS_BASETYPE |
 540                                Py_TPFLAGS_CHECKTYPES |
 541                                Py_TPFLAGS_HEAPTYPE);
 542   gobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 543   gobj->ty.ht_type.tp_free = 0;
 544   gobj->ty.ht_type.tp_new = ge_pynew;
 545   typeready(&gobj->ty.ht_type);
 546   return ((PyObject *)gobj);
 547 }
 548
 549 PyObject *group_pywrap(group *g)
 550 {
 551   PyTypeObject *ty;
 552
 553   if (strcmp(G_NAME(g), "prime") == 0) ty = primegroup_pytype;
 554   else if (strcmp(G_NAME(g), "bin") == 0) ty = bingroup_pytype;
 555   else if (strcmp(G_NAME(g), "ec") == 0) ty = ecgroup_pytype;
 556   else abort();
 557   return (group_dopywrap(ty, g));
 558 }
 559
 560 /*----- Group elements ----------------------------------------------------*/
 561
 562 #define BINOP(name)                                                     \
 563   static PyObject *ge_py##name(PyObject *x, PyObject *y)                \
 564   {                                                                     \
 565     ge *z;                                                              \
 566     group *g;                                                           \
 567     if (!GE_PYCHECK(x) || !GE_PYCHECK(y) ||                             \
 568         (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y))))         \
 569       RETURN_NOTIMPL;                                                   \
 570     g = GE_G(x);                                                        \
 571     z = G_CREATE(g);                                                    \
 572     g->ops->name(g, z, GE_X(x), GE_X(y));                               \
 573     return (ge_pywrap(GE_GOBJ(x), z));                                  \
 574   }
 575 BINOP(mul)
 576 BINOP(div)
 577 #undef BINOP
 578
 579 #define UNOP(name)                                                      \
 580   static PyObject *gemeth_##name(PyObject *me, PyObject *arg)           \
 581   {                                                                     \
 582     group *g;                                                           \
 583     ge *z;                                                              \
 584     if (!PyArg_ParseTuple(arg, ":" #name)) return (0);                  \
 585     g = GE_G(me);                                                       \
 586     z = G_CREATE(g);                                                    \
 587     g->ops->name(g, z, GE_X(me));                                       \
 588     return (ge_pywrap(GE_GOBJ(me), z));                                 \
 589   }
 590 UNOP(sqr)
 591 UNOP(inv)
 592 #undef UNOP
 593
 594 static PyObject *ge_pyexp(PyObject *x, PyObject *n, PyObject *m)
 595 {
 596   mp *nn;
 597   ge *z;
 598
 599   if (m != Py_None || !GE_PYCHECK(x) || (nn = getmp(n)) == 0)
 600     RETURN_NOTIMPL;
 601   z = G_CREATE(GE_G(x));
 602   G_EXP(GE_G(x), z, GE_X(x), nn);
 603   MP_DROP(nn);
 604   return (ge_pywrap(GE_GOBJ(x), z));
 605 }
 606
 607 static void ge_pydealloc(PyObject *me)
 608 {
 609   G_DESTROY(GE_G(me), GE_X(me));
 610   Py_DECREF(GE_GOBJ(me));
 611   FREEOBJ(me);
 612 }
 613
 614 static void group_pydealloc(PyObject *me)
 615 {
 616   G_DESTROYGROUP(GROUP_G(me));
 617   PyType_Type.tp_dealloc(me);
 618 }
 619
 620 static PyObject *gmexp_id(PyObject *me)
 621 {
 622   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 623   G_COPY(g, x, g->i); return (ge_pywrap(me, x));
 624 }
 625
 626 static int gmexp_fill(void *pp, PyObject  *me, PyObject *x, PyObject *m)
 627 {
 628   group_expfactor *f = pp;
 629
 630   if (!GE_PYCHECK(x) || GE_G(x) != GROUP_G(me) || (f->exp = getmp(m)) == 0)
 631     return (-1);
 632   f->base = GE_X(x);
 633   return (0);
 634 }
 635
 636 static PyObject *ge_pyrichcompare(PyObject *x, PyObject *y, int op)
 637 {
 638   int b;
 639   PyObject *rc = 0;
 640
 641   if (!GE_PYCHECK(x) || !GE_PYCHECK(y) ||
 642       (GE_G(x) != GE_G(y) && !group_samep(GE_G(x), GE_G(y))))
 643     RETURN_NOTIMPL;
 644   switch (op) {
 645     case Py_EQ: b = G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
 646     case Py_NE: b = !G_EQ(GE_G(x), GE_X(x), GE_X(y)); break;
 647     default: TYERR("group elements are unordered");
 648   }
 649   rc = getbool(b);
 650 end:
 651   return (rc);
 652 }
 653
 654 static PyObject *gemeth_check(PyObject *me, PyObject *arg)
 655 {
 656   if (!PyArg_ParseTuple(arg, ":check")) goto end;
 657   if (group_check(GE_G(me), GE_X(me))) VALERR("bad group element");
 658   RETURN_OBJ(me);
 659 end:
 660   return (0);
 661 }
 662
 663 static int ge_pynonzerop(PyObject *x)
 664   { return (!G_IDENTP(GE_G(x), GE_X(x))); }
 665
 666 static PyObject *ge_pystr(PyObject *me)
 667 {
 668   dstr d = DSTR_INIT;
 669   PyObject *rc;
 670
 671   group_writedstr(GE_G(me), GE_X(me), &d);
 672   rc = PyString_FromStringAndSize(d.buf, d.len);
 673   DDESTROY(&d);
 674   return (rc);
 675 }
 676
 677 static PyObject *ge_pylong(PyObject *me)
 678 {
 679   mp *x = 0;
 680   PyObject *rc = 0;
 681
 682   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 683     TYERR("can't convert to integer");
 684   rc = mp_topylong(x);
 685 end:
 686   mp_drop(x);
 687   return (rc);
 688 }
 689
 690 static PyObject *ge_pyint(PyObject *me)
 691 {
 692   mp *x = 0;
 693   PyObject *rc = 0;
 694   long l;
 695
 696   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 697     TYERR("can't convert to integer");
 698   if (!mp_tolong_checked(x, &l, 0)) rc = PyInt_FromLong(l);
 699   else rc = mp_topylong(x);
 700 end:
 701   mp_drop(x);
 702   return (rc);
 703 }
 704
 705 static PyObject *gemeth_toint(PyObject *me, PyObject *arg)
 706 {
 707   mp *x;
 708
 709   if (!PyArg_ParseTuple(arg, ":toint")) goto end;
 710   if ((x = G_TOINT(GE_G(me), MP_NEW, GE_X(me))) == 0)
 711     TYERR("can't convert to integer");
 712   return (mp_pywrap(x));
 713 end:
 714   return (0);
 715 }
 716
 717 static PyObject *gemeth_toec(PyObject *me, PyObject *arg, PyObject *kw)
 718 {
 719   char *kwlist[] = { "curve", 0 };
 720   PyTypeObject *cty = 0;
 721   PyObject *rc = 0;
 722   group *g;
 723   ec_curve *c;
 724   ec p = EC_INIT;
 725
 726   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:toec", kwlist,
 727                                    &cty)) goto end;
 728   g = GROUP_G(GE_GOBJ(me));
 729   if (cty) {
 730     if (!PyType_Check(cty) || !PyType_IsSubtype(cty, ecpt_pytype))
 731       TYERR("want subtype of catacomb.ECPt");
 732     Py_INCREF((PyObject *)cty);
 733   } else if (strcmp(G_NAME(g), "ec") == 0) {
 734     c = eccurve_copy(((gctx_ec *)g)->ei.c);
 735     cty = (PyTypeObject *)eccurve_pywrap(0, c);
 736   } else  {
 737     cty = ecpt_pytype;
 738     Py_INCREF((PyObject *)cty);
 739   }
 740   if (G_TOEC(GE_G(me), &p, GE_X(me))) {
 741     Py_DECREF((PyObject *)cty);
 742     TYERR("can't convert to ec point");
 743   }
 744   rc = ecpt_pywrapout(cty, &p);
 745   Py_DECREF((PyObject *)cty);
 746 end:
 747   return (rc);
 748 }
 749
 750 static PyObject *gemeth_tobuf(PyObject *me, PyObject *arg)
 751 {
 752   buf b;
 753   PyObject *rc;
 754   size_t n;
 755
 756   if (!PyArg_ParseTuple(arg, ":tobuf")) return (0);
 757   n = GE_G(me)->noctets + 4;
 758   rc = bytestring_pywrap(0, n);
 759   buf_init(&b, PyString_AS_STRING(rc), n);
 760   G_TOBUF(GE_G(me), &b, GE_X(me));
 761   assert(BOK(&b));
 762   _PyString_Resize(&rc, BLEN(&b));
 763   return (rc);
 764 }
 765
 766 static PyObject *gemeth_toraw(PyObject *me, PyObject *arg)
 767 {
 768   buf b;
 769   PyObject *rc;
 770   size_t n;
 771
 772   if (!PyArg_ParseTuple(arg, ":toraw")) return (0);
 773   n = GE_G(me)->noctets;
 774   rc = bytestring_pywrap(0, n);
 775   buf_init(&b, PyString_AS_STRING(rc), n);
 776   G_TORAW(GE_G(me), &b, GE_X(me));
 777   assert(BOK(&b));
 778   _PyString_Resize(&rc, BLEN(&b));
 779   return (rc);
 780 }
 781
 782 static PyObject *gmexp_exp(PyObject *me, void *pp, int n)
 783 {
 784   ge *z = G_CREATE(GROUP_G(me));
 785   G_MEXP(GROUP_G(me), z, pp, n);
 786   return (ge_pywrap(me, z));
 787 }
 788
 789 static void gmexp_drop(void *pp)
 790 {
 791   group_expfactor *f = pp;
 792   MP_DROP(f->exp);
 793 }
 794
 795 static PyObject *gmeth_mexp(PyObject *me, PyObject *arg)
 796 {
 797   return (mexp_common(me, arg, sizeof(group_expfactor),
 798                       gmexp_id, gmexp_fill, gmexp_exp, gmexp_drop));
 799 }
 800
 801 static PyObject *gmeth_checkgroup(PyObject *me, PyObject *arg, PyObject *kw)
 802 {
 803   char *kwlist[] = { "rng", 0 };
 804   grand *r = &rand_global;
 805   const char *p;
 806
 807   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:checkgroup", kwlist,
 808                                    convgrand, &r))
 809     goto end;
 810   if ((p = G_CHECK(GROUP_G(me), r)) != 0)
 811     VALERR(p);
 812   RETURN_OBJ(me);
 813 end:
 814   return (0);
 815 }
 816
 817 static PyObject *group_pyrichcompare(PyObject *x, PyObject *y, int op)
 818 {
 819   int b = group_samep(GROUP_G(x), GROUP_G(y));
 820   switch (op) {
 821     case Py_EQ: break;
 822     case Py_NE: b = !b;
 823     default: TYERR("can't order groups");
 824   }
 825   return (getbool(b));
 826 end:
 827   return (0);
 828 }
 829
 830 static PyObject *meth__GE_frombuf(PyObject *me, PyObject *arg)
 831 {
 832   buf b;
 833   char *p;
 834   Py_ssize_t n;
 835   group *g;
 836   ge *x = 0;
 837
 838   if (!PyArg_ParseTuple(arg, "Os#:frombuf", &me, &p, &n))
 839     return (0);
 840   g = GROUP_G(me);
 841   buf_init(&b, p, n);
 842   x = G_CREATE(g);
 843   if (G_FROMBUF(g, &b, x))
 844     VALERR("invalid data");
 845   return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
 846 end:
 847   if (x) G_DESTROY(g, x);
 848   return (0);
 849 }
 850
 851 static PyObject *meth__GE_fromraw(PyObject *me, PyObject *arg)
 852 {
 853   buf b;
 854   char *p;
 855   Py_ssize_t n;
 856   group *g;
 857   ge *x = 0;
 858
 859   if (!PyArg_ParseTuple(arg, "Os#:fromraw", &me, &p, &n))
 860     return (0);
 861   g = GROUP_G(me);
 862   buf_init(&b, p, n);
 863   x = G_CREATE(g);
 864   if (G_FROMRAW(g, &b, x))
 865     VALERR("invalid data");
 866   return (Py_BuildValue("(NN)", ge_pywrap(me, x), bytestring_pywrapbuf(&b)));
 867 end:
 868   if (x) G_DESTROY(g, x);
 869   return (0);
 870 }
 871
 872 static PyObject *meth__GE_fromstring(PyObject *me, PyObject *arg)
 873 {
 874   mptext_stringctx sc;
 875   char *p;
 876   Py_ssize_t n;
 877   group *g;
 878   ge *x = 0;
 879
 880   if (!PyArg_ParseTuple(arg, "Os#:fromstring", &me, &p, &n))
 881     return (0);
 882   sc.buf = p;
 883   sc.lim = sc.buf + n;
 884   g = GROUP_G(me);
 885   x = G_CREATE(g);
 886   if (G_READ(g, x, &mptext_stringops, &sc))
 887     VALERR("bad group element string");
 888   return (Py_BuildValue("(Ns#)", ge_pywrap(me, x),
 889                         sc.buf, (Py_ssize_t)(sc.lim - sc.buf)));
 890 end:
 891   if (x) G_DESTROY(g, x);
 892   return (0);
 893 }
 894
 895 static PyObject *meth__Group_parse(PyObject *me, PyObject *arg)
 896 {
 897   char *p;
 898   qd_parse qd;
 899   group *g;
 900
 901   if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p))
 902     goto end;
 903   qd.p = p;
 904   qd.e = 0;
 905   if ((g = group_parse(&qd)) == 0)
 906     VALERR(qd.e);
 907   return (group_pywrap(g));
 908 end:
 909   return (0);
 910 }
 911
 912 static PyObject *geget_group(PyObject *me, void *hunoz)
 913   { RETURN_OBJ(GE_GOBJ(me)); }
 914
 915 static PyObject *gget_nbits(PyObject *me, void *hunoz)
 916   { return (PyInt_FromLong(GROUP_G(me)->nbits)); }
 917
 918 static PyObject *gget_noctets(PyObject *me, void *hunoz)
 919   { return (PyInt_FromLong(GROUP_G(me)->noctets)); }
 920
 921 static PyObject *gget_i(PyObject *me, void *hunoz)
 922 {
 923   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 924   G_COPY(g, x, g->i); return (ge_pywrap(me, x));
 925 }
 926
 927 static PyObject *gget_g(PyObject *me, void *hunoz)
 928 {
 929   group *g = GROUP_G(me); ge *x = G_CREATE(g);
 930   G_COPY(g, x, g->g); return (ge_pywrap(me, x));
 931 }
 932
 933 static long ge_pyhash(PyObject *me)
 934 {
 935   buf b;
 936   size_t sz = GE_G(me)->noctets + 4;
 937   uint32 h = 0xf672c776 + GE_G(me)->ops->ty;
 938   octet *p = xmalloc(sz);
 939   buf_init(&b, p, sz);
 940   G_TOBUF(GE_G(me), &b, GE_X(me));
 941   assert(BOK(&b));
 942   h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
 943   xfree(p);
 944   return (h % LONG_MAX);
 945 }
 946
 947 static PyObject *gget_r(PyObject *me, void *hunoz)
 948   { return (mp_pywrap(MP_COPY(GROUP_G(me)->r))); }
 949
 950 static PyObject *gget_h(PyObject *me, void *hunoz)
 951   { return (mp_pywrap(MP_COPY(GROUP_G(me)->h))); }
 952
 953 static PyGetSetDef ge_pygetset[] = {
 954 #define GETSETNAME(op, name) ge##op##_##name
 955   GET   (group,         "X.group -> group containing X")
 956 #undef GETSETNAME
 957   { 0 }
 958 };
 959
 960 static PyMethodDef ge_pymethods[] = {
 961 #define METHNAME(name) gemeth_##name
 962   METH  (inv,           "X.inv() -> inverse element of X")
 963   METH  (sqr,           "X.sqr() -> X^2 = X * X")
 964   METH  (check,         "X.check() -> check X really belongs to its group")
 965   METH  (toint,         "X.toint() -> X converted to an integer")
 966   KWMETH(toec,          "\
 967 X.toec(curve = ecpt) -> X converted to elliptic curve point")
 968   METH  (tobuf,         "X.tobuf() -> X in buffer representation")
 969   METH  (toraw,         "X.toraw() -> X in raw representation")
 970 #undef METHNAME
 971   { 0 }
 972 };
 973
 974 static PyNumberMethods ge_pynumber = {
 975   0,                                    /* @nb_add@ */
 976   0,                                    /* @nb_subtract@ */
 977   ge_pymul,                             /* @nb_multiply@ */
 978   ge_pydiv,                             /* @nb_divide@ */
 979   0,                                    /* @nb_remainder@ */
 980   0,                                    /* @nb_divmod@ */
 981   ge_pyexp,                             /* @nb_power@ */
 982   0,                                    /* @nb_negative@ */
 983   0,                                    /* @nb_positive@ */
 984   0,                                    /* @nb_absolute@ */
 985   ge_pynonzerop,                        /* @nb_nonzero@ */
 986   0,                                    /* @nb_invert@ */
 987   0,                                    /* @nb_lshift@ */
 988   0,                                    /* @nb_rshift@ */
 989   0,                                    /* @nb_and@ */
 990   0,                                    /* @nb_xor@ */
 991   0,                                    /* @nb_or@ */
 992   0,                                    /* @nb_coerce@ */
 993   ge_pyint,                             /* @nb_int@ */
 994   ge_pylong,                            /* @nb_long@ */
 995   0 /* meaningless */,                  /* @nb_float@ */
 996   0,                                    /* @nb_oct@ */
 997   0,                                    /* @nb_hex@ */
 998
 999   0,                                    /* @nb_inplace_add@ */
1000   0,                                    /* @nb_inplace_subtract@ */
1001   0,                                    /* @nb_inplace_multiply@ */
1002   0,                                    /* @nb_inplace_divide@ */
1003   0,                                    /* @nb_inplace_remainder@ */
1004   0,                                    /* @nb_inplace_power@ */
1005   0,                                    /* @nb_inplace_lshift@ */
1006   0,                                    /* @nb_inplace_rshift@ */
1007   0,                                    /* @nb_inplace_and@ */
1008   0,                                    /* @nb_inplace_xor@ */
1009   0,                                    /* @nb_inplace_or@ */
1010
1011   0,                                    /* @nb_floor_divide@ */
1012   ge_pydiv,                             /* @nb_true_divide@ */
1013   0,                                    /* @nb_inplace_floor_divide@ */
1014   0,                                    /* @nb_inplace_true_divide@ */
1015 };
1016
1017 static PyTypeObject ge_pytype_skel = {
1018   PyObject_HEAD_INIT(0) 0,              /* Header */
1019   "GE",                                 /* @tp_name@ */
1020   sizeof(ge_pyobj),                     /* @tp_basicsize@ */
1021   0,                                    /* @tp_itemsize@ */
1022
1023   ge_pydealloc,                         /* @tp_dealloc@ */
1024   0,                                    /* @tp_print@ */
1025   0,                                    /* @tp_getattr@ */
1026   0,                                    /* @tp_setattr@ */
1027   0,                                    /* @tp_compare@ */
1028   0,                                    /* @tp_repr@ */
1029   &ge_pynumber,                         /* @tp_as_number@ */
1030   0,                                    /* @tp_as_sequence@ */
1031   0,                                    /* @tp_as_mapping@ */
1032   ge_pyhash,                            /* @tp_hash@ */
1033   0,                                    /* @tp_call@ */
1034   ge_pystr,                             /* @tp_str@ */
1035   0,                                    /* @tp_getattro@ */
1036   0,                                    /* @tp_setattro@ */
1037   0,                                    /* @tp_as_buffer@ */
1038   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1039     Py_TPFLAGS_CHECKTYPES |
1040     Py_TPFLAGS_BASETYPE,
1041
1042   /* @tp_doc@ */
1043 "Group elements, abstract base class.",
1044
1045   0,                                    /* @tp_traverse@ */
1046   0,                                    /* @tp_clear@ */
1047   ge_pyrichcompare,                     /* @tp_richcompare@ */
1048   0,                                    /* @tp_weaklistoffset@ */
1049   0,                                    /* @tp_iter@ */
1050   0,                                    /* @tp_iternext@ */
1051   ge_pymethods,                         /* @tp_methods@ */
1052   0,                                    /* @tp_members@ */
1053   ge_pygetset,                          /* @tp_getset@ */
1054   0,                                    /* @tp_base@ */
1055   0,                                    /* @tp_dict@ */
1056   0,                                    /* @tp_descr_get@ */
1057   0,                                    /* @tp_descr_set@ */
1058   0,                                    /* @tp_dictoffset@ */
1059   0,                                    /* @tp_init@ */
1060   PyType_GenericAlloc,                  /* @tp_alloc@ */
1061   abstract_pynew,                       /* @tp_new@ */
1062   0,                                    /* @tp_free@ */
1063   0                                     /* @tp_is_gc@ */
1064 };
1065
1066 static PyGetSetDef group_pygetset[] = {
1067 #define GETSETNAME(op, name) g##op##_##name
1068   GET   (noctets,       "G.noctets -> size in octets of element")
1069   GET   (nbits,         "G.nbits -> size in bits of element")
1070   GET   (i,             "G.i -> group identity")
1071   GET   (g,             "G.g -> group generator")
1072   GET   (r,             "G.r -> group order")
1073   GET   (h,             "G.h -> group cofactor")
1074 #undef GETSETNAME
1075   { 0 }
1076 };
1077
1078 static PyMethodDef group_pymethods[] = {
1079 #define METHNAME(name) gmeth_##name
1080   METH  (mexp,          "\
1081 G.mexp([(X0, N0), (X1, N1), ...]) -> X0^N0 X1^N1 ...")
1082   KWMETH(checkgroup,    "G.checkgroup(rand = random): check group is good")
1083 #undef METHNAME
1084   { 0 }
1085 };
1086
1087 static PyTypeObject group_pytype_skel = {
1088   PyObject_HEAD_INIT(0) 0,              /* Header */
1089   "Group",                              /* @tp_name@ */
1090   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1091   0,                                    /* @tp_itemsize@ */
1092
1093   group_pydealloc,                      /* @tp_dealloc@ */
1094   0,                                    /* @tp_print@ */
1095   0,                                    /* @tp_getattr@ */
1096   0,                                    /* @tp_setattr@ */
1097   0,                                    /* @tp_compare@ */
1098   0,                                    /* @tp_repr@ */
1099   0,                                    /* @tp_as_number@ */
1100   0,                                    /* @tp_as_sequence@ */
1101   0,                                    /* @tp_as_mapping@ */
1102   0,                                    /* @tp_hash@ */
1103   0,                                    /* @tp_call@ */
1104   0,                                    /* @tp_str@ */
1105   0,                                    /* @tp_getattro@ */
1106   0,                                    /* @tp_setattro@ */
1107   0,                                    /* @tp_as_buffer@ */
1108   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1109     Py_TPFLAGS_BASETYPE,
1110
1111   /* @tp_doc@ */
1112 "Abstract base class for groups.",
1113
1114   0,                                    /* @tp_traverse@ */
1115   0,                                    /* @tp_clear@ */
1116   group_pyrichcompare,                  /* @tp_richcompare@ */
1117   0,                                    /* @tp_weaklistoffset@ */
1118   0,                                    /* @tp_iter@ */
1119   0,                                    /* @tp_iternext@ */
1120   group_pymethods,                      /* @tp_methods@ */
1121   0,                                    /* @tp_members@ */
1122   group_pygetset,                       /* @tp_getset@ */
1123   0,                                    /* @tp_base@ */
1124   0,                                    /* @tp_dict@ */
1125   0,                                    /* @tp_descr_get@ */
1126   0,                                    /* @tp_descr_set@ */
1127   0,                                    /* @tp_dictoffset@ */
1128   0,                                    /* @tp_init@ */
1129   PyType_GenericAlloc,                  /* @tp_alloc@ */
1130   abstract_pynew,                       /* @tp_new@ */
1131   0,                                    /* @tp_free@ */
1132   0                                     /* @tp_is_gc@ */
1133 };
1134
1135 static PyObject *pgget_info(PyObject *me, void *hunoz)
1136 {
1137   gprime_param dp;
1138   gctx_prime *gg = (gctx_prime *)GROUP_G(me);
1139   dp.p = MP_COPY(gg->mm.m);
1140   dp.q = MP_COPY(gg->g.r);
1141   dp.g = mpmont_reduce(&gg->mm, MP_NEW, gg->gen.x);
1142   return (fginfo_pywrap(&dp, dhinfo_pytype));
1143 }
1144
1145 static PyGetSetDef primegroup_pygetset[] = {
1146 #define GETSETNAME(op, name) pg##op##_##name
1147   GET   (info,          "G.info -> information about the group")
1148 #undef GETSETNAME
1149   { 0 }
1150 };
1151
1152 static PyObject *primegroup_pynew(PyTypeObject *ty,
1153                                   PyObject *arg, PyObject *kw)
1154 {
1155   PyObject *i;
1156   char *kwlist[] = { "info", 0 };
1157
1158   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", kwlist,
1159                                    dhinfo_pytype, &i))
1160     return (0);
1161   return (group_dopywrap(ty, group_prime(FGINFO_DP(i))));
1162 }
1163
1164 static PyTypeObject primegroup_pytype_skel = {
1165   PyObject_HEAD_INIT(0) 0,              /* Header */
1166   "PrimeGroup",                         /* @tp_name@ */
1167   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1168   0,                                    /* @tp_itemsize@ */
1169
1170   group_pydealloc,                      /* @tp_dealloc@ */
1171   0,                                    /* @tp_print@ */
1172   0,                                    /* @tp_getattr@ */
1173   0,                                    /* @tp_setattr@ */
1174   0,                                    /* @tp_compare@ */
1175   0,                                    /* @tp_repr@ */
1176   0,                                    /* @tp_as_number@ */
1177   0,                                    /* @tp_as_sequence@ */
1178   0,                                    /* @tp_as_mapping@ */
1179   0,                                    /* @tp_hash@ */
1180   0,                                    /* @tp_call@ */
1181   0,                                    /* @tp_str@ */
1182   0,                                    /* @tp_getattro@ */
1183   0,                                    /* @tp_setattro@ */
1184   0,                                    /* @tp_as_buffer@ */
1185   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1186     Py_TPFLAGS_BASETYPE,
1187
1188   /* @tp_doc@ */
1189 "Subgroups of prime fields.",
1190
1191   0,                                    /* @tp_traverse@ */
1192   0,                                    /* @tp_clear@ */
1193   0,                                    /* @tp_richcompare@ */
1194   0,                                    /* @tp_weaklistoffset@ */
1195   0,                                    /* @tp_iter@ */
1196   0,                                    /* @tp_iternext@ */
1197   0,                                    /* @tp_methods@ */
1198   0,                                    /* @tp_members@ */
1199   primegroup_pygetset,                  /* @tp_getset@ */
1200   0,                                    /* @tp_base@ */
1201   0,                                    /* @tp_dict@ */
1202   0,                                    /* @tp_descr_get@ */
1203   0,                                    /* @tp_descr_set@ */
1204   0,                                    /* @tp_dictoffset@ */
1205   0,                                    /* @tp_init@ */
1206   PyType_GenericAlloc,                  /* @tp_alloc@ */
1207   primegroup_pynew,                     /* @tp_new@ */
1208   0,                                    /* @tp_free@ */
1209   0                                     /* @tp_is_gc@ */
1210 };
1211
1212 static PyObject *bgget_info(PyObject *me, void *hunoz)
1213 {
1214   gbin_param dp;
1215   gctx_bin *gg = (gctx_bin *)GROUP_G(me);
1216   dp.p = MP_COPY(gg->r.p);
1217   dp.q = MP_COPY(gg->g.r);
1218   dp.g = MP_COPY(gg->gen.x);
1219   return (fginfo_pywrap(&dp, bindhinfo_pytype));
1220 }
1221
1222 static PyGetSetDef bingroup_pygetset[] = {
1223 #define GETSETNAME(op, name) bg##op##_##name
1224   GET   (info,          "G.info -> information about the group")
1225 #undef GETSETNAME
1226   { 0 }
1227 };
1228
1229 static PyObject *bingroup_pynew(PyTypeObject *ty,
1230                                 PyObject *arg, PyObject *kw)
1231 {
1232   PyObject *i;
1233   char *kwlist[] = { "info", 0 };
1234
1235   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", kwlist,
1236                                    bindhinfo_pytype, &i))
1237     return (0);
1238   return (group_dopywrap(ty, group_binary(FGINFO_DP(i))));
1239 }
1240
1241 static PyTypeObject bingroup_pytype_skel = {
1242   PyObject_HEAD_INIT(0) 0,              /* Header */
1243   "BinGroup",                           /* @tp_name@ */
1244   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1245   0,                                    /* @tp_itemsize@ */
1246
1247   group_pydealloc,                      /* @tp_dealloc@ */
1248   0,                                    /* @tp_print@ */
1249   0,                                    /* @tp_getattr@ */
1250   0,                                    /* @tp_setattr@ */
1251   0,                                    /* @tp_compare@ */
1252   0,                                    /* @tp_repr@ */
1253   0,                                    /* @tp_as_number@ */
1254   0,                                    /* @tp_as_sequence@ */
1255   0,                                    /* @tp_as_mapping@ */
1256   0,                                    /* @tp_hash@ */
1257   0,                                    /* @tp_call@ */
1258   0,                                    /* @tp_str@ */
1259   0,                                    /* @tp_getattro@ */
1260   0,                                    /* @tp_setattro@ */
1261   0,                                    /* @tp_as_buffer@ */
1262   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1263     Py_TPFLAGS_BASETYPE,
1264
1265   /* @tp_doc@ */
1266 "Subgroups of binary fields.",
1267
1268   0,                                    /* @tp_traverse@ */
1269   0,                                    /* @tp_clear@ */
1270   0,                                    /* @tp_richcompare@ */
1271   0,                                    /* @tp_weaklistoffset@ */
1272   0,                                    /* @tp_iter@ */
1273   0,                                    /* @tp_iternext@ */
1274   0,                                    /* @tp_methods@ */
1275   0,                                    /* @tp_members@ */
1276   bingroup_pygetset,                    /* @tp_getset@ */
1277   0,                                    /* @tp_base@ */
1278   0,                                    /* @tp_dict@ */
1279   0,                                    /* @tp_descr_get@ */
1280   0,                                    /* @tp_descr_set@ */
1281   0,                                    /* @tp_dictoffset@ */
1282   0,                                    /* @tp_init@ */
1283   PyType_GenericAlloc,                  /* @tp_alloc@ */
1284   bingroup_pynew,                       /* @tp_new@ */
1285   0,                                    /* @tp_free@ */
1286   0                                     /* @tp_is_gc@ */
1287 };
1288
1289 static PyObject *egget_info(PyObject *me, void *hunoz)
1290 {
1291   ec_info ei;
1292   gctx_ec *gg = (gctx_ec *)GROUP_G(me);
1293
1294   ecinfo_copy(&ei, &gg->ei);
1295   return (ecinfo_pywrap(&ei));
1296 }
1297
1298 static PyGetSetDef ecgroup_pygetset[] = {
1299 #define GETSETNAME(op, name) eg##op##_##name
1300   GET   (info,          "G.info -> information about the group")
1301 #undef GETSETNAME
1302   { 0 }
1303 };
1304
1305 static PyObject *ecgroup_pynew(PyTypeObject *ty,
1306                                PyObject *arg, PyObject *kw)
1307 {
1308   PyObject *i;
1309   ec_info ei;
1310   char *kwlist[] = { "info", 0 };
1311
1312   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!:new", kwlist,
1313                                    ecinfo_pytype, &i))
1314     return (0);
1315   ecinfo_copy(&ei, ECINFO_EI(i));
1316   return (group_dopywrap(ty, group_ec(&ei)));
1317 }
1318
1319 static PyTypeObject ecgroup_pytype_skel = {
1320   PyObject_HEAD_INIT(0) 0,              /* Header */
1321   "ECGroup",                            /* @tp_name@ */
1322   sizeof(group_pyobj),                  /* @tp_basicsize@ */
1323   0,                                    /* @tp_itemsize@ */
1324
1325   group_pydealloc,                      /* @tp_dealloc@ */
1326   0,                                    /* @tp_print@ */
1327   0,                                    /* @tp_getattr@ */
1328   0,                                    /* @tp_setattr@ */
1329   0,                                    /* @tp_compare@ */
1330   0,                                    /* @tp_repr@ */
1331   0,                                    /* @tp_as_number@ */
1332   0,                                    /* @tp_as_sequence@ */
1333   0,                                    /* @tp_as_mapping@ */
1334   0,                                    /* @tp_hash@ */
1335   0,                                    /* @tp_call@ */
1336   0,                                    /* @tp_str@ */
1337   0,                                    /* @tp_getattro@ */
1338   0,                                    /* @tp_setattro@ */
1339   0,                                    /* @tp_as_buffer@ */
1340   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1341     Py_TPFLAGS_BASETYPE,
1342
1343   /* @tp_doc@ */
1344 "Elliptic curve groups.",
1345
1346   0,                                    /* @tp_traverse@ */
1347   0,                                    /* @tp_clear@ */
1348   0,                                    /* @tp_richcompare@ */
1349   0,                                    /* @tp_weaklistoffset@ */
1350   0,                                    /* @tp_iter@ */
1351   0,                                    /* @tp_iternext@ */
1352   0,                                    /* @tp_methods@ */
1353   0,                                    /* @tp_members@ */
1354   ecgroup_pygetset,                     /* @tp_getset@ */
1355   0,                                    /* @tp_base@ */
1356   0,                                    /* @tp_dict@ */
1357   0,                                    /* @tp_descr_get@ */
1358   0,                                    /* @tp_descr_set@ */
1359   0,                                    /* @tp_dictoffset@ */
1360   0,                                    /* @tp_init@ */
1361   PyType_GenericAlloc,                  /* @tp_alloc@ */
1362   ecgroup_pynew,                        /* @tp_new@ */
1363   0,                                    /* @tp_free@ */
1364   0                                     /* @tp_is_gc@ */
1365 };
1366
1367 /*----- Global stuff ------------------------------------------------------*/
1368
1369 static PyMethodDef methods[] = {
1370 #define METHNAME(name) meth_##name
1371   METH  (_GE_frombuf,           "frombuf(BUF) -> X, REST")
1372   METH  (_GE_fromraw,           "fromraw(BUF) -> X, REST")
1373   METH  (_GE_fromstring,        "fromstring(STR) -> X, REST")
1374   METH  (_Group_parse,          "parse(STR) -> G, REST")
1375   METH  (_DHInfo_parse,         "parse(STR) -> D, REST")
1376   METH  (_BinDHInfo_parse,      "parse(STR) -> D, REST")
1377   METH  (_DHInfo__groupn,       0)
1378   METH  (_BinDHInfo__groupn,    0)
1379   KWMETH(_DHInfo_generate,      "\
1380 generate(PBITS, [qbits = 0, event = pgen_nullev,\n\
1381          rng = rand, nsteps = 0]) -> D")
1382   KWMETH(_DHInfo_genlimlee,     "\
1383 genlimlee(PBITS, QBITS, [event = pgen_nullev, ievent = pgen_nullev,\n\
1384           rng = rand, nsteps = 0, subgroupp = True]) -> (D, [Q, ...])")
1385   KWMETH(_DHInfo_gendsa,        "\
1386 gendsa(PBITS, QBITS, SEED, [event = pgen_nullev, nsteps = 0])\n\
1387   -> (D, SEED, COUNT)")
1388   KWMETH(_DHInfo_genkcdsa,      "\
1389 gendsa(PBITS, QBITS, [event = pgen_nullev, rng = rand, nsteps = 0])\n\
1390   -> (D, V)")
1391 #undef METHNAME
1392   { 0 }
1393 };
1394
1395 void group_pyinit(void)
1396 {
1397   INITTYPE(fginfo, root);
1398   INITTYPE(dhinfo, fginfo);
1399   INITTYPE(bindhinfo, dhinfo);
1400   INITTYPE(ge, root);
1401   INITTYPE(group, type);
1402   INITTYPE(primegroup, group);
1403   INITTYPE(bingroup, group);
1404   INITTYPE(ecgroup, group);
1405   addmethods(methods);
1406 }
1407
1408 void group_pyinsert(PyObject *mod)
1409 {
1410   INSERT("FGInfo", fginfo_pytype);
1411   INSERT("DHInfo", dhinfo_pytype);
1412   INSERT("BinDHInfo", bindhinfo_pytype);
1413   INSERT("GE", ge_pytype);
1414   INSERT("Group", group_pytype);
1415   INSERT("PrimeGroup", primegroup_pytype);
1416   INSERT("BinGroup", bingroup_pytype);
1417   INSERT("ECGroup", ecgroup_pytype);
1418   INSERT("_pgroups", namedgroups(ptab, &npgroups));
1419   INSERT("_bingroups", namedgroups(bintab, &nbingroups));
1420 }
1421
1422 /*----- That's all, folks -------------------------------------------------*/