chiark - git - mdw - catacomb-python/blob - rand.c

   1 /* -*-c-*-
   2  *
   3  * Random-number generators
   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 #include "algorithms.h"
  31
  32 /*----- Main code ---------------------------------------------------------*/
  33
  34 PyTypeObject *grand_pytype, *truerand_pytype;
  35 PyTypeObject *lcrand_pytype, *fibrand_pytype;
  36 PyTypeObject *dsarand_pytype, *bbs_pytype, *bbspriv_pytype;
  37 PyTypeObject *sslprf_pytype, *tlsdx_pytype, *tlsprf_pytype;
  38 PyObject *rand_pyobj;
  39
  40 static PyObject *gccrands_dict;
  41
  42 static PyObject *grand_dopywrap(PyTypeObject *ty, grand *r, unsigned f)
  43 {
  44   grand_pyobj *g;
  45
  46   g = (grand_pyobj *)ty->tp_alloc(ty, 0);
  47   g->r = r;
  48   g->f = f;
  49   return ((PyObject *)g);
  50 }
  51
  52 PyObject *grand_pywrap(grand *r, unsigned f)
  53 {
  54   PyTypeObject *ty = grand_pytype;
  55   PyObject *ob;
  56
  57   if (strcmp(r->ops->name, "rand") == 0) ty = truerand_pytype;
  58   else if (strcmp(r->ops->name, "lcrand") == 0) ty = lcrand_pytype;
  59   else if (strcmp(r->ops->name, "fibrand") == 0) ty = fibrand_pytype;
  60   else if (strcmp(r->ops->name, "dsarand") == 0) ty = dsarand_pytype;
  61   else if (strcmp(r->ops->name, "bbs") == 0) ty = bbs_pytype;
  62   else if (strcmp(r->ops->name, "sslprf") == 0) ty = sslprf_pytype;
  63   else if (strcmp(r->ops->name, "tlsdx") == 0) ty = tlsdx_pytype;
  64   else if (strcmp(r->ops->name, "tlsprf") == 0) ty = tlsprf_pytype;
  65   else if ((ob = PyDict_GetItemString(gccrands_dict, r->ops->name)) != 0)
  66     ty = (PyTypeObject *)ob;
  67   return (grand_dopywrap(ty, r, f));
  68 }
  69
  70 CONVFUNC(grand, grand *, GRAND_R)
  71
  72 static PyObject *grmeth_byte(PyObject *me, PyObject *arg)
  73 {
  74   if (!PyArg_ParseTuple(arg, ":byte")) return (0);
  75   return (PyInt_FromLong(grand_byte(GRAND_R(me))));
  76 }
  77
  78 static PyObject *grmeth_word(PyObject *me, PyObject *arg)
  79 {
  80   if (!PyArg_ParseTuple(arg, ":word")) return (0);
  81   return (getulong(grand_word(GRAND_R(me))));
  82 }
  83
  84 static PyObject *grmeth_range(PyObject *me, PyObject *arg)
  85 {
  86   PyObject *m;
  87   mp *x = 0;
  88   mp *y = 0;
  89
  90   if (!PyArg_ParseTuple(arg, "O:range", &m)) return (0);
  91   if (PyInt_Check(m)) {
  92     long mm = PyInt_AS_LONG(m);
  93     if (mm <= 0)
  94       goto notpos;
  95     if (mm <= 0xffffffff)
  96       return (PyInt_FromLong(grand_range(GRAND_R(me), mm)));
  97   }
  98   if ((x = getmp(m)) == 0)
  99     goto end;
 100   if (!MP_POSP(x))
 101     goto notpos;
 102   y = mprand_range(MP_NEW, x, GRAND_R(me), 0);
 103   MP_DROP(x);
 104   return (mp_pywrap(y));
 105 notpos:
 106   VALERR("range must be strictly positive");
 107 end:
 108   if (x) MP_DROP(x);
 109   return (0);
 110 }
 111
 112 static PyObject *grmeth_mp(PyObject *me, PyObject *arg, PyObject *kw)
 113 {
 114   size_t l;
 115   mpw o = 0;
 116   char *kwlist[] = { "bits", "or", 0 };
 117
 118   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:mp", kwlist,
 119                                    convszt, &l, convmpw, &o))
 120     goto end;
 121   if (l < MPW_BITS && (o >> l)) VALERR("or mask too large");
 122   return (mp_pywrap(mprand(MP_NEW, l, GRAND_R(me), o)));
 123 end:
 124   return (0);
 125 }
 126
 127 static PyObject *grmeth_block(PyObject *me, PyObject *arg)
 128 {
 129   unsigned long n;
 130   PyObject *rc = 0;
 131
 132   if (!PyArg_ParseTuple(arg, "O&:block", convulong, &n)) goto end;
 133   rc = bytestring_pywrap(0, n);
 134   grand_fill(GRAND_R(me), PyString_AS_STRING(rc), n);
 135 end:
 136   return (rc);
 137 }
 138
 139 static int checkop(grand *r, unsigned op, const char *what)
 140 {
 141   if (r->ops->misc(r, GRAND_CHECK, op))
 142     return (0);
 143   PyErr_Format(PyExc_TypeError, "operation %s not supported", what);
 144   return (-1);
 145 }
 146
 147 static PyObject *grmeth_seedint(PyObject *me, PyObject *arg)
 148 {
 149   int i;
 150   grand *r = GRAND_R(me);
 151   if (!PyArg_ParseTuple(arg, "i:seedint", &i) ||
 152       checkop(r, GRAND_SEEDINT, "seedint"))
 153     goto end;
 154   r->ops->misc(r, GRAND_SEEDINT, i);
 155   RETURN_ME;
 156 end:
 157   return (0);
 158 }
 159
 160 static PyObject *grmeth_seedword(PyObject *me, PyObject *arg)
 161 {
 162   uint32 u;
 163   grand *r = GRAND_R(me);
 164   if (!PyArg_ParseTuple(arg, "O&:seedword", convu32, &u) ||
 165       checkop(r, GRAND_SEEDUINT32, "seedword"))
 166     goto end;
 167   r->ops->misc(r, GRAND_SEEDUINT32, u);
 168   RETURN_ME;
 169 end:
 170   return (0);
 171 }
 172
 173 static PyObject *grmeth_seedblock(PyObject *me, PyObject *arg)
 174 {
 175   char *p;
 176   int n;
 177   grand *r = GRAND_R(me);
 178   if (!PyArg_ParseTuple(arg, "s#:seedblock", &p, &n) ||
 179       checkop(r, GRAND_SEEDBLOCK, "seedblock"))
 180     goto end;
 181   r->ops->misc(r, GRAND_SEEDBLOCK, p, (size_t)n);
 182   RETURN_ME;
 183 end:
 184   return (0);
 185 }
 186
 187 static PyObject *grmeth_seedmp(PyObject *me, PyObject *arg)
 188 {
 189   PyObject *x;
 190   mp *xx;
 191   grand *r = GRAND_R(me);
 192   if (!PyArg_ParseTuple(arg, "O:seedmp", &x) ||
 193       checkop(r, GRAND_SEEDMP, "seedmp") ||
 194       (xx = getmp(x)) == 0)
 195     goto end;
 196   r->ops->misc(r, GRAND_SEEDMP, xx);
 197   MP_DROP(xx);
 198   RETURN_ME;
 199 end:
 200   return (0);
 201 }
 202
 203 static PyObject *grmeth_seedrand(PyObject *me, PyObject *arg, PyObject *kw)
 204 {
 205   char *kwlist[] = { "rng", 0 };
 206   grand *r = GRAND_R(me);
 207   grand *rr = &rand_global;
 208   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:seedrand", kwlist,
 209                                    convgrand, &rr) ||
 210       checkop(r, GRAND_SEEDRAND, "seedrand"))
 211     goto end;
 212   r->ops->misc(r, GRAND_SEEDRAND, rr);
 213   RETURN_ME;
 214 end:
 215   return (0);
 216 }
 217
 218 static PyObject *grmeth_mask(PyObject *me, PyObject *arg)
 219 {
 220   grand *r = GRAND_R(me);
 221   char *p, *q;
 222   int sz;
 223   PyObject *rc;
 224
 225   if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) return (0);
 226   rc = bytestring_pywrap(0, sz);
 227   q = PyString_AS_STRING(rc);
 228   GR_FILL(r, q, sz);
 229   while (sz--) *q++ ^= *p++;
 230   return (rc);
 231 }
 232
 233 static void grand_pydealloc(PyObject *me)
 234 {
 235   grand_pyobj *g = (grand_pyobj *)me;
 236   if (g->f & f_freeme)
 237     GR_DESTROY(g->r);
 238   FREEOBJ(me);
 239 }
 240
 241 static PyObject *grget_name(PyObject *me, void *hunoz)
 242   { return (PyString_FromString(GRAND_R(me)->ops->name)); }
 243
 244 static PyObject *grget_cryptop(PyObject *me, void *hunoz)
 245   { return (getbool(GRAND_R(me)->ops->f & GRAND_CRYPTO)); }
 246
 247 static PyGetSetDef grand_pygetset[] = {
 248 #define GETSETNAME(op, name) gr##op##_##name
 249   GET   (name,          "R.name -> name of this kind of generator")
 250   GET   (cryptop,       "R.cryptop -> flag: cryptographically strong?")
 251 #undef GETSETNAME
 252   { 0 }
 253 };
 254
 255 static PyMethodDef grand_pymethods[] = {
 256 #define METHNAME(name) grmeth_##name
 257   METH  (byte,          "R.byte() -> BYTE")
 258   METH  (word,          "R.word() -> WORD")
 259   METH  (block,         "R.block(N) -> STRING")
 260   KWMETH(mp,            "R.mp(bits, [or = 0]) -> MP")
 261   METH  (range,         "R.range(MAX) -> INT")
 262   METH  (mask,          "R.mask(STR) -> STR")
 263   METH  (seedint,       "R.seedint(I)")
 264   METH  (seedword,      "R.seedword(I)")
 265   METH  (seedblock,     "R.seedblock(BYTES)")
 266   METH  (seedmp,        "R.seedmp(X)")
 267   KWMETH(seedrand,      "R.seedrand(RR)")
 268 #undef METHNAME
 269   { 0 }
 270 };
 271
 272 static PyTypeObject grand_pytype_skel = {
 273   PyObject_HEAD_INIT(0) 0,              /* Header */
 274   "GRand",                              /* @tp_name@ */
 275   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 276   0,                                    /* @tp_itemsize@ */
 277
 278   grand_pydealloc,                      /* @tp_dealloc@ */
 279   0,                                    /* @tp_print@ */
 280   0,                                    /* @tp_getattr@ */
 281   0,                                    /* @tp_setattr@ */
 282   0,                                    /* @tp_compare@ */
 283   0,                                    /* @tp_repr@ */
 284   0,                                    /* @tp_as_number@ */
 285   0,                                    /* @tp_as_sequence@ */
 286   0,                                    /* @tp_as_mapping@ */
 287   0,                                    /* @tp_hash@ */
 288   0,                                    /* @tp_call@ */
 289   0,                                    /* @tp_str@ */
 290   0,                                    /* @tp_getattro@ */
 291   0,                                    /* @tp_setattro@ */
 292   0,                                    /* @tp_as_buffer@ */
 293   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 294     Py_TPFLAGS_BASETYPE,
 295
 296   /* @tp_doc@ */
 297 "Generic random number source.",
 298
 299   0,                                    /* @tp_traverse@ */
 300   0,                                    /* @tp_clear@ */
 301   0,                                    /* @tp_richcompare@ */
 302   0,                                    /* @tp_weaklistoffset@ */
 303   0,                                    /* @tp_iter@ */
 304   0,                                    /* @tp_iternext@ */
 305   grand_pymethods,                      /* @tp_methods@ */
 306   0,                                    /* @tp_members@ */
 307   grand_pygetset,                       /* @tp_getset@ */
 308   0,                                    /* @tp_base@ */
 309   0,                                    /* @tp_dict@ */
 310   0,                                    /* @tp_descr_get@ */
 311   0,                                    /* @tp_descr_set@ */
 312   0,                                    /* @tp_dictoffset@ */
 313   0,                                    /* @tp_init@ */
 314   PyType_GenericAlloc,                  /* @tp_alloc@ */
 315   abstract_pynew,                       /* @tp_new@ */
 316   0,                                    /* @tp_free@ */
 317   0                                     /* @tp_is_gc@ */
 318 };
 319
 320 static PyObject *lcrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 321 {
 322   uint32 n = 0;
 323   char *kwlist[] = { "seed", 0 };
 324   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", kwlist, convu32, &n))
 325     return (0);
 326   return (grand_dopywrap(lcrand_pytype, lcrand_create(n), f_freeme));
 327 }
 328
 329 static PyTypeObject lcrand_pytype_skel = {
 330   PyObject_HEAD_INIT(0) 0,              /* Header */
 331   "LCRand",                             /* @tp_name@ */
 332   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 333   0,                                    /* @tp_itemsize@ */
 334
 335   grand_pydealloc,                      /* @tp_dealloc@ */
 336   0,                                    /* @tp_print@ */
 337   0,                                    /* @tp_getattr@ */
 338   0,                                    /* @tp_setattr@ */
 339   0,                                    /* @tp_compare@ */
 340   0,                                    /* @tp_repr@ */
 341   0,                                    /* @tp_as_number@ */
 342   0,                                    /* @tp_as_sequence@ */
 343   0,                                    /* @tp_as_mapping@ */
 344   0,                                    /* @tp_hash@ */
 345   0,                                    /* @tp_call@ */
 346   0,                                    /* @tp_str@ */
 347   0,                                    /* @tp_getattro@ */
 348   0,                                    /* @tp_setattro@ */
 349   0,                                    /* @tp_as_buffer@ */
 350   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 351     Py_TPFLAGS_BASETYPE,
 352
 353   /* @tp_doc@ */
 354 "Linear congruential generator.",
 355
 356   0,                                    /* @tp_traverse@ */
 357   0,                                    /* @tp_clear@ */
 358   0,                                    /* @tp_richcompare@ */
 359   0,                                    /* @tp_weaklistoffset@ */
 360   0,                                    /* @tp_iter@ */
 361   0,                                    /* @tp_iternext@ */
 362   0,                                    /* @tp_methods@ */
 363   0,                                    /* @tp_members@ */
 364   0,                                    /* @tp_getset@ */
 365   0,                                    /* @tp_base@ */
 366   0,                                    /* @tp_dict@ */
 367   0,                                    /* @tp_descr_get@ */
 368   0,                                    /* @tp_descr_set@ */
 369   0,                                    /* @tp_dictoffset@ */
 370   0,                                    /* @tp_init@ */
 371   PyType_GenericAlloc,                  /* @tp_alloc@ */
 372   lcrand_pynew,                         /* @tp_new@ */
 373   0,                                    /* @tp_free@ */
 374   0                                     /* @tp_is_gc@ */
 375 };
 376
 377 static PyObject *fibrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 378 {
 379   uint32 n = 0;
 380   char *kwlist[] = { "seed", 0 };
 381   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", kwlist, convu32, &n))
 382     return (0);
 383   return (grand_dopywrap(fibrand_pytype, fibrand_create(n), f_freeme));
 384 }
 385
 386 static PyTypeObject fibrand_pytype_skel = {
 387   PyObject_HEAD_INIT(0) 0,              /* Header */
 388   "FibRand",                            /* @tp_name@ */
 389   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 390   0,                                    /* @tp_itemsize@ */
 391
 392   grand_pydealloc,                      /* @tp_dealloc@ */
 393   0,                                    /* @tp_print@ */
 394   0,                                    /* @tp_getattr@ */
 395   0,                                    /* @tp_setattr@ */
 396   0,                                    /* @tp_compare@ */
 397   0,                                    /* @tp_repr@ */
 398   0,                                    /* @tp_as_number@ */
 399   0,                                    /* @tp_as_sequence@ */
 400   0,                                    /* @tp_as_mapping@ */
 401   0,                                    /* @tp_hash@ */
 402   0,                                    /* @tp_call@ */
 403   0,                                    /* @tp_str@ */
 404   0,                                    /* @tp_getattro@ */
 405   0,                                    /* @tp_setattro@ */
 406   0,                                    /* @tp_as_buffer@ */
 407   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 408     Py_TPFLAGS_BASETYPE,
 409
 410   /* @tp_doc@ */
 411 "Fibonacci generator.",
 412
 413   0,                                    /* @tp_traverse@ */
 414   0,                                    /* @tp_clear@ */
 415   0,                                    /* @tp_richcompare@ */
 416   0,                                    /* @tp_weaklistoffset@ */
 417   0,                                    /* @tp_iter@ */
 418   0,                                    /* @tp_iternext@ */
 419   0,                                    /* @tp_methods@ */
 420   0,                                    /* @tp_members@ */
 421   0,                                    /* @tp_getset@ */
 422   0,                                    /* @tp_base@ */
 423   0,                                    /* @tp_dict@ */
 424   0,                                    /* @tp_descr_get@ */
 425   0,                                    /* @tp_descr_set@ */
 426   0,                                    /* @tp_dictoffset@ */
 427   0,                                    /* @tp_init@ */
 428   PyType_GenericAlloc,                  /* @tp_alloc@ */
 429   fibrand_pynew,                        /* @tp_new@ */
 430   0,                                    /* @tp_free@ */
 431   0                                     /* @tp_is_gc@ */
 432 };
 433
 434 /*----- True random generator ---------------------------------------------*/
 435
 436 static PyObject *trmeth_gate(PyObject *me, PyObject *arg)
 437 {
 438   grand *r = GRAND_R(me);
 439   if (!PyArg_ParseTuple(arg, ":gate")) return (0);
 440   r->ops->misc(r, RAND_GATE);
 441   RETURN_ME;
 442 }
 443
 444 static PyObject *trmeth_stretch(PyObject *me, PyObject *arg)
 445 {
 446   grand *r = GRAND_R(me);
 447   if (!PyArg_ParseTuple(arg, ":stretch")) return (0);
 448   r->ops->misc(r, RAND_STRETCH);
 449   RETURN_ME;
 450 }
 451
 452 static PyObject *trmeth_add(PyObject *me, PyObject *arg)
 453 {
 454   grand *r = GRAND_R(me);
 455   char *p; int n; unsigned goodbits;
 456   if (!PyArg_ParseTuple(arg, "s#O&:add", &p, &n, convuint, &goodbits))
 457     return (0);
 458   r->ops->misc(r, RAND_ADD, p, (size_t)n, goodbits);
 459   RETURN_ME;
 460 }
 461
 462 static PyObject *trmeth_key(PyObject *me, PyObject *arg)
 463 {
 464   grand *r = GRAND_R(me);
 465   char *p; int n;
 466   if (!PyArg_ParseTuple(arg, "s#:key", &p, &n)) return (0);
 467   r->ops->misc(r, RAND_KEY, p, (size_t)n);
 468   RETURN_ME;
 469 }
 470
 471 static PyObject *trmeth_seed(PyObject *me, PyObject *arg)
 472 {
 473   grand *r = GRAND_R(me);
 474   unsigned u;
 475   if (!PyArg_ParseTuple(arg, "O&:seed", convuint, &u)) return (0);
 476   if (u > RAND_IBITS) VALERR("pointlessly large");
 477   r->ops->misc(r, RAND_SEED, u);
 478   RETURN_ME;
 479 end:
 480   return (0);
 481 }
 482
 483 static PyObject *trmeth_timer(PyObject *me, PyObject *arg)
 484 {
 485   grand *r = GRAND_R(me);
 486   if (!PyArg_ParseTuple(arg, ":timer")) return (0);
 487   r->ops->misc(r, RAND_TIMER);
 488   RETURN_ME;
 489 }
 490
 491 static PyObject *truerand_pynew(PyTypeObject *ty,
 492                                 PyObject *arg, PyObject *kw)
 493 {
 494   char *kwlist[] = { 0 };
 495   grand *r;
 496   PyObject *rc = 0;
 497   if (PyArg_ParseTupleAndKeywords(arg, kw, ":new", kwlist)) goto end;
 498   r = rand_create();
 499   r->ops->misc(r, RAND_NOISESRC, &noise_source);
 500   r->ops->misc(r, RAND_SEED, 160);
 501   rc = grand_dopywrap(ty, r, f_freeme);
 502 end:
 503   return (rc);
 504 }
 505
 506 static PyMethodDef truerand_pymethods[] = {
 507 #define METHNAME(name) trmeth_##name
 508   METH  (gate,          "R.gate()")
 509   METH  (stretch,       "R.stretch()")
 510   METH  (key,           "R.key(BYTES)")
 511   METH  (seed,          "R.seed(NBITS)")
 512   METH  (add,           "R.add(BYTES, GOODBITS")
 513   METH  (timer,         "R.timer()")
 514 #undef METHNAME
 515   { 0 }
 516 };
 517
 518 static PyObject *trget_goodbits(PyObject *me, void *hunoz)
 519 {
 520   grand *r = GRAND_R(me);
 521   return (PyInt_FromLong(r->ops->misc(r, RAND_GOODBITS)));
 522 }
 523
 524 static PyGetSetDef truerand_pygetset[] = {
 525 #define GETSETNAME(op, name) tr##op##_##name
 526   GET   (goodbits,      "R.goodbits -> good bits of entropy remaining")
 527 #undef GETSETNAME
 528   { 0 }
 529 };
 530
 531 static PyTypeObject truerand_pytype_skel = {
 532   PyObject_HEAD_INIT(0) 0,              /* Header */
 533   "TrueRand",                           /* @tp_name@ */
 534   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 535   0,                                    /* @tp_itemsize@ */
 536
 537   grand_pydealloc,                      /* @tp_dealloc@ */
 538   0,                                    /* @tp_print@ */
 539   0,                                    /* @tp_getattr@ */
 540   0,                                    /* @tp_setattr@ */
 541   0,                                    /* @tp_compare@ */
 542   0,                                    /* @tp_repr@ */
 543   0,                                    /* @tp_as_number@ */
 544   0,                                    /* @tp_as_sequence@ */
 545   0,                                    /* @tp_as_mapping@ */
 546   0,                                    /* @tp_hash@ */
 547   0,                                    /* @tp_call@ */
 548   0,                                    /* @tp_str@ */
 549   0,                                    /* @tp_getattro@ */
 550   0,                                    /* @tp_setattro@ */
 551   0,                                    /* @tp_as_buffer@ */
 552   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 553     Py_TPFLAGS_BASETYPE,
 554
 555   /* @tp_doc@ */
 556 "True random number source.",
 557
 558   0,                                    /* @tp_traverse@ */
 559   0,                                    /* @tp_clear@ */
 560   0,                                    /* @tp_richcompare@ */
 561   0,                                    /* @tp_weaklistoffset@ */
 562   0,                                    /* @tp_iter@ */
 563   0,                                    /* @tp_iternext@ */
 564   truerand_pymethods,                   /* @tp_methods@ */
 565   0,                                    /* @tp_members@ */
 566   truerand_pygetset,                    /* @tp_getset@ */
 567   0,                                    /* @tp_base@ */
 568   0,                                    /* @tp_dict@ */
 569   0,                                    /* @tp_descr_get@ */
 570   0,                                    /* @tp_descr_set@ */
 571   0,                                    /* @tp_dictoffset@ */
 572   0,                                    /* @tp_init@ */
 573   PyType_GenericAlloc,                  /* @tp_alloc@ */
 574   truerand_pynew,                       /* @tp_new@ */
 575   0,                                    /* @tp_free@ */
 576   0                                     /* @tp_is_gc@ */
 577 };
 578
 579 /*----- Generators from symmetric encryption algorithms -------------------*/
 580
 581 static PyTypeObject *gccrand_pytype, *gcrand_pytype;
 582
 583 typedef grand *gcrand_func(const void *, size_t sz);
 584 typedef grand *gcirand_func(const void *, size_t sz, uint32);
 585 typedef grand *gcnrand_func(const void *, size_t sz, const void *);
 586 typedef struct gccrand_info {
 587   const char *name;
 588   const octet *keysz;
 589   unsigned f;
 590   size_t noncesz;
 591   gcrand_func *func;
 592 } gccrand_info;
 593
 594 #define RNGF_INT 1u
 595 #define RNGF_NONCE 2u
 596
 597 typedef struct gccrand_pyobj {
 598   PyHeapTypeObject ty;
 599   const gccrand_info *info;
 600 } gccrand_pyobj;
 601 #define GCCRAND_INFO(o) (((gccrand_pyobj *)(o))->info)
 602
 603 #define GCCRAND_DEF(name, ksz, func, f, nsz)                            \
 604   static const gccrand_info func##_info =                               \
 605     { name, ksz, f, nsz, (gcrand_func *)func };
 606 RNGS(GCCRAND_DEF)
 607
 608 static const gccrand_info *const gcrandtab[] = {
 609 #define GCCRAND_ENTRY(name, ksz, func, f, nsz) &func##_info,
 610   RNGS(GCCRAND_ENTRY)
 611   0
 612 };
 613
 614 static PyObject *gcrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 615 {
 616   const gccrand_info *info = GCCRAND_INFO(ty);
 617   static char *kwlist[] = { "key", 0 };
 618   char *k;
 619   int n;
 620
 621   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &k, &n))
 622     goto end;
 623   if (keysz(n, info->keysz) != n) VALERR("bad key length");
 624   return (grand_dopywrap(ty, info->func(k, n), f_freeme));
 625 end:
 626   return (0);
 627 }
 628
 629 static PyObject *gcirand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 630 {
 631   const gccrand_info *info = GCCRAND_INFO(ty);
 632   uint32 i = 0;
 633   static char *kwlist[] = { "key", "i", 0 };
 634   char *k;
 635   int n;
 636
 637   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&:new", kwlist,
 638                                    &k, &n, convu32, &i))
 639     goto end;
 640   if (keysz(n, info->keysz) != n) VALERR("bad key length");
 641   return (grand_dopywrap(ty,
 642                          ((gcirand_func *)info->func)(k, n, i),
 643                          f_freeme));
 644 end:
 645   return (0);
 646 }
 647
 648 static PyObject *gcnrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 649 {
 650   const gccrand_info *info = GCCRAND_INFO(ty);
 651   static char *kwlist[] = { "key", "nonce", 0 };
 652   char *k, *n;
 653   int ksz, nsz;
 654
 655   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#:new", kwlist,
 656                                    &k, &ksz, &n, &nsz))
 657     goto end;
 658   if (keysz(ksz, info->keysz) != ksz) VALERR("bad key length");
 659   if (nsz != info->noncesz) VALERR("bad nonce length");
 660   return (grand_dopywrap(ty,
 661                          ((gcnrand_func *)info->func)(k, ksz, n),
 662                          f_freeme));
 663 end:
 664   return (0);
 665 }
 666
 667 static PyObject *gccrand_pywrap(const gccrand_info *info)
 668 {
 669   gccrand_pyobj *g = newtype(gccrand_pytype, 0, info->name);
 670   g->info = info;
 671   g->ty.ht_type.tp_basicsize = sizeof(grand_pyobj);
 672   g->ty.ht_type.tp_base = gcrand_pytype;
 673   Py_INCREF(gcrand_pytype);
 674   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 675                             Py_TPFLAGS_BASETYPE |
 676                             Py_TPFLAGS_HEAPTYPE);
 677   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 678   g->ty.ht_type.tp_free = 0;
 679   if (info->f & RNGF_INT) g->ty.ht_type.tp_new = gcirand_pynew;
 680   else if (info->f & RNGF_NONCE) g->ty.ht_type.tp_new = gcnrand_pynew;
 681   else g->ty.ht_type.tp_new = gcrand_pynew;
 682   typeready(&g->ty.ht_type);
 683   return ((PyObject *)g);
 684 }
 685
 686 static PyObject *gccrget_name(PyObject *me, void *hunoz)
 687   { return (PyString_FromString(GCCRAND_INFO(me)->name)); }
 688 static PyObject *gccrget_keysz(PyObject *me, void *hunoz)
 689   { return (keysz_pywrap(GCCRAND_INFO(me)->keysz)); }
 690
 691 static PyGetSetDef gccrand_pygetset[] = {
 692 #define GETSETNAME(op, name) gccr##op##_##name
 693   GET   (keysz,                 "CR.keysz -> acceptable key sizes")
 694   GET   (name,                  "CR.name -> name of this kind of generator")
 695 #undef GETSETNAME
 696   { 0 }
 697 };
 698
 699 static PyTypeObject gccrand_pytype_skel = {
 700   PyObject_HEAD_INIT(0) 0,              /* Header */
 701   "GCCRand",                            /* @tp_name@ */
 702   sizeof(gccrand_pyobj),                /* @tp_basicsize@ */
 703   0,                                    /* @tp_itemsize@ */
 704
 705   0,                                    /* @tp_dealloc@ */
 706   0,                                    /* @tp_print@ */
 707   0,                                    /* @tp_getattr@ */
 708   0,                                    /* @tp_setattr@ */
 709   0,                                    /* @tp_compare@ */
 710   0,                                    /* @tp_repr@ */
 711   0,                                    /* @tp_as_number@ */
 712   0,                                    /* @tp_as_sequence@ */
 713   0,                                    /* @tp_as_mapping@ */
 714   0,                                    /* @tp_hash@ */
 715   0,                                    /* @tp_call@ */
 716   0,                                    /* @tp_str@ */
 717   0,                                    /* @tp_getattro@ */
 718   0,                                    /* @tp_setattro@ */
 719   0,                                    /* @tp_as_buffer@ */
 720   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 721     Py_TPFLAGS_BASETYPE,
 722
 723   /* @tp_doc@ */
 724 "Metaclass for symmetric crypto-based generators.",
 725
 726   0,                                    /* @tp_traverse@ */
 727   0,                                    /* @tp_clear@ */
 728   0,                                    /* @tp_richcompare@ */
 729   0,                                    /* @tp_weaklistoffset@ */
 730   0,                                    /* @tp_iter@ */
 731   0,                                    /* @tp_iternext@ */
 732   0,                                    /* @tp_methods@ */
 733   0,                                    /* @tp_members@ */
 734   gccrand_pygetset,                     /* @tp_getset@ */
 735   0,                                    /* @tp_base@ */
 736   0,                                    /* @tp_dict@ */
 737   0,                                    /* @tp_descr_get@ */
 738   0,                                    /* @tp_descr_set@ */
 739   0,                                    /* @tp_dictoffset@ */
 740   0,                                    /* @tp_init@ */
 741   PyType_GenericAlloc,                  /* @tp_alloc@ */
 742   abstract_pynew,                       /* @tp_new@ */
 743   0,                                    /* @tp_free@ */
 744   0                                     /* @tp_is_gc@ */
 745 };
 746
 747 static PyTypeObject gcrand_pytype_skel = {
 748   PyObject_HEAD_INIT(0) 0,              /* Header */
 749   "GCRand",                             /* @tp_name@ */
 750   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 751   0,                                    /* @tp_itemsize@ */
 752
 753   grand_pydealloc,                      /* @tp_dealloc@ */
 754   0,                                    /* @tp_print@ */
 755   0,                                    /* @tp_getattr@ */
 756   0,                                    /* @tp_setattr@ */
 757   0,                                    /* @tp_compare@ */
 758   0,                                    /* @tp_repr@ */
 759   0,                                    /* @tp_as_number@ */
 760   0,                                    /* @tp_as_sequence@ */
 761   0,                                    /* @tp_as_mapping@ */
 762   0,                                    /* @tp_hash@ */
 763   0,                                    /* @tp_call@ */
 764   0,                                    /* @tp_str@ */
 765   0,                                    /* @tp_getattro@ */
 766   0,                                    /* @tp_setattro@ */
 767   0,                                    /* @tp_as_buffer@ */
 768   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 769     Py_TPFLAGS_BASETYPE,
 770
 771   /* @tp_doc@ */
 772 "Abstract base class for symmetric crypto-based generators.",
 773
 774   0,                                    /* @tp_traverse@ */
 775   0,                                    /* @tp_clear@ */
 776   0,                                    /* @tp_richcompare@ */
 777   0,                                    /* @tp_weaklistoffset@ */
 778   0,                                    /* @tp_iter@ */
 779   0,                                    /* @tp_iternext@ */
 780   0,                                    /* @tp_methods@ */
 781   0,                                    /* @tp_members@ */
 782   0,                                    /* @tp_getset@ */
 783   0,                                    /* @tp_base@ */
 784   0,                                    /* @tp_dict@ */
 785   0,                                    /* @tp_descr_get@ */
 786   0,                                    /* @tp_descr_set@ */
 787   0,                                    /* @tp_dictoffset@ */
 788   0,                                    /* @tp_init@ */
 789   PyType_GenericAlloc,                  /* @tp_alloc@ */
 790   abstract_pynew,                       /* @tp_new@ */
 791   0,                                    /* @tp_free@ */
 792   0                                     /* @tp_is_gc@ */
 793 };
 794
 795 /*----- SSL and TLS generators --------------------------------------------*/
 796
 797 static PyObject *sslprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 798 {
 799   char *k, *s;
 800   int ksz, ssz;
 801   const gchash *hco = &md5, *hci = &sha;
 802   PyObject *rc = 0;
 803   char *kwlist[] = { "key", "seed", "ohash", "ihash", 0 };
 804
 805   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&O&:new", kwlist,
 806                                    &k, &ksz, &s, &ssz,
 807                                    convgchash, &hco, convgchash, &hci))
 808     goto end;
 809   rc = grand_dopywrap(ty, sslprf_rand(hco, hci, k, ksz, s, ssz), f_freeme);
 810 end:
 811   return (rc);
 812 }
 813
 814 static PyObject *tlsdx_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 815 {
 816   char *k, *s;
 817   int ksz, ssz;
 818   const gcmac *mc = &sha_hmac;
 819   PyObject *rc = 0;
 820   char *kwlist[] = { "key", "seed", "mac", 0 };
 821
 822   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&:new", kwlist,
 823                                    &k, &ksz, &s, &ssz,
 824                                    convgcmac, &mc))
 825     goto end;
 826   rc = grand_dopywrap(ty, tlsdx_rand(mc, k, ksz, s, ssz), f_freeme);
 827 end:
 828   return (rc);
 829 }
 830
 831 static PyObject *tlsprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 832 {
 833   char *k, *s;
 834   int ksz, ssz;
 835   const gcmac *mcl = &md5_hmac, *mcr = &sha_hmac;
 836   PyObject *rc = 0;
 837   char *kwlist[] = { "key", "seed", "lmac", "rmac", 0 };
 838
 839   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&O&:new", kwlist,
 840                                    &k, &ksz, &s, &ssz,
 841                                    convgcmac, &mcl, convgcmac, &mcr))
 842     goto end;
 843   rc = grand_dopywrap(ty, tlsprf_rand(mcl, mcr, k, ksz, s, ssz), f_freeme);
 844 end:
 845   return (rc);
 846 }
 847
 848 static PyTypeObject sslprf_pytype_skel = {
 849   PyObject_HEAD_INIT(0) 0,              /* Header */
 850   "SSLRand",                            /* @tp_name@ */
 851   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 852   0,                                    /* @tp_itemsize@ */
 853
 854   grand_pydealloc,                      /* @tp_dealloc@ */
 855   0,                                    /* @tp_print@ */
 856   0,                                    /* @tp_getattr@ */
 857   0,                                    /* @tp_setattr@ */
 858   0,                                    /* @tp_compare@ */
 859   0,                                    /* @tp_repr@ */
 860   0,                                    /* @tp_as_number@ */
 861   0,                                    /* @tp_as_sequence@ */
 862   0,                                    /* @tp_as_mapping@ */
 863   0,                                    /* @tp_hash@ */
 864   0,                                    /* @tp_call@ */
 865   0,                                    /* @tp_str@ */
 866   0,                                    /* @tp_getattro@ */
 867   0,                                    /* @tp_setattro@ */
 868   0,                                    /* @tp_as_buffer@ */
 869   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 870     Py_TPFLAGS_BASETYPE,
 871
 872   /* @tp_doc@ */
 873 "Random number generator for SSL master secret.",
 874
 875   0,                                    /* @tp_traverse@ */
 876   0,                                    /* @tp_clear@ */
 877   0,                                    /* @tp_richcompare@ */
 878   0,                                    /* @tp_weaklistoffset@ */
 879   0,                                    /* @tp_iter@ */
 880   0,                                    /* @tp_iternext@ */
 881   0,                                    /* @tp_methods@ */
 882   0,                                    /* @tp_members@ */
 883   0,                                    /* @tp_getset@ */
 884   0,                                    /* @tp_base@ */
 885   0,                                    /* @tp_dict@ */
 886   0,                                    /* @tp_descr_get@ */
 887   0,                                    /* @tp_descr_set@ */
 888   0,                                    /* @tp_dictoffset@ */
 889   0,                                    /* @tp_init@ */
 890   PyType_GenericAlloc,                  /* @tp_alloc@ */
 891   sslprf_pynew,                         /* @tp_new@ */
 892   0,                                    /* @tp_free@ */
 893   0                                     /* @tp_is_gc@ */
 894 };
 895
 896 static PyTypeObject tlsdx_pytype_skel = {
 897   PyObject_HEAD_INIT(0) 0,              /* Header */
 898   "TLSDataExpansion",                   /* @tp_name@ */
 899   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 900   0,                                    /* @tp_itemsize@ */
 901
 902   grand_pydealloc,                      /* @tp_dealloc@ */
 903   0,                                    /* @tp_print@ */
 904   0,                                    /* @tp_getattr@ */
 905   0,                                    /* @tp_setattr@ */
 906   0,                                    /* @tp_compare@ */
 907   0,                                    /* @tp_repr@ */
 908   0,                                    /* @tp_as_number@ */
 909   0,                                    /* @tp_as_sequence@ */
 910   0,                                    /* @tp_as_mapping@ */
 911   0,                                    /* @tp_hash@ */
 912   0,                                    /* @tp_call@ */
 913   0,                                    /* @tp_str@ */
 914   0,                                    /* @tp_getattro@ */
 915   0,                                    /* @tp_setattro@ */
 916   0,                                    /* @tp_as_buffer@ */
 917   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 918     Py_TPFLAGS_BASETYPE,
 919
 920   /* @tp_doc@ */
 921 "TLS data expansion function.",
 922
 923   0,                                    /* @tp_traverse@ */
 924   0,                                    /* @tp_clear@ */
 925   0,                                    /* @tp_richcompare@ */
 926   0,                                    /* @tp_weaklistoffset@ */
 927   0,                                    /* @tp_iter@ */
 928   0,                                    /* @tp_iternext@ */
 929   0,                                    /* @tp_methods@ */
 930   0,                                    /* @tp_members@ */
 931   0,                                    /* @tp_getset@ */
 932   0,                                    /* @tp_base@ */
 933   0,                                    /* @tp_dict@ */
 934   0,                                    /* @tp_descr_get@ */
 935   0,                                    /* @tp_descr_set@ */
 936   0,                                    /* @tp_dictoffset@ */
 937   0,                                    /* @tp_init@ */
 938   PyType_GenericAlloc,                  /* @tp_alloc@ */
 939   tlsdx_pynew,                          /* @tp_new@ */
 940   0,                                    /* @tp_free@ */
 941   0                                     /* @tp_is_gc@ */
 942 };
 943
 944 static PyTypeObject tlsprf_pytype_skel = {
 945   PyObject_HEAD_INIT(0) 0,              /* Header */
 946   "TLSPRF",                             /* @tp_name@ */
 947   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 948   0,                                    /* @tp_itemsize@ */
 949
 950   grand_pydealloc,                      /* @tp_dealloc@ */
 951   0,                                    /* @tp_print@ */
 952   0,                                    /* @tp_getattr@ */
 953   0,                                    /* @tp_setattr@ */
 954   0,                                    /* @tp_compare@ */
 955   0,                                    /* @tp_repr@ */
 956   0,                                    /* @tp_as_number@ */
 957   0,                                    /* @tp_as_sequence@ */
 958   0,                                    /* @tp_as_mapping@ */
 959   0,                                    /* @tp_hash@ */
 960   0,                                    /* @tp_call@ */
 961   0,                                    /* @tp_str@ */
 962   0,                                    /* @tp_getattro@ */
 963   0,                                    /* @tp_setattro@ */
 964   0,                                    /* @tp_as_buffer@ */
 965   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 966     Py_TPFLAGS_BASETYPE,
 967
 968   /* @tp_doc@ */
 969 "TLS pseudorandom function.",
 970
 971   0,                                    /* @tp_traverse@ */
 972   0,                                    /* @tp_clear@ */
 973   0,                                    /* @tp_richcompare@ */
 974   0,                                    /* @tp_weaklistoffset@ */
 975   0,                                    /* @tp_iter@ */
 976   0,                                    /* @tp_iternext@ */
 977   0,                                    /* @tp_methods@ */
 978   0,                                    /* @tp_members@ */
 979   0,                                    /* @tp_getset@ */
 980   0,                                    /* @tp_base@ */
 981   0,                                    /* @tp_dict@ */
 982   0,                                    /* @tp_descr_get@ */
 983   0,                                    /* @tp_descr_set@ */
 984   0,                                    /* @tp_dictoffset@ */
 985   0,                                    /* @tp_init@ */
 986   PyType_GenericAlloc,                  /* @tp_alloc@ */
 987   tlsprf_pynew,                         /* @tp_new@ */
 988   0,                                    /* @tp_free@ */
 989   0                                     /* @tp_is_gc@ */
 990 };
 991
 992 /*----- DSA generator -----------------------------------------------------*/
 993
 994 static PyObject *dsarand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 995 {
 996   char *p;
 997   int sz;
 998   PyObject *rc = 0;
 999   char *kwlist[] = { "seed", 0 };
1000
1001   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &sz))
1002     goto end;
1003   rc = grand_dopywrap(ty, dsarand_create(p, sz), f_freeme);
1004 end:
1005   return (rc);
1006 }
1007
1008 static PyObject *drget_seed(PyObject *me, void *hunoz)
1009 {
1010   grand *r = GRAND_R(me);
1011   int n = r->ops->misc(r, DSARAND_SEEDSZ);
1012   PyObject *rc = bytestring_pywrap(0, n);
1013   r->ops->misc(r, DSARAND_GETSEED, PyString_AS_STRING(rc));
1014   return (rc);
1015 }
1016
1017 static PyGetSetDef dsarand_pygetset[] = {
1018 #define GETSETNAME(op, name) dr##op##_##name
1019   GET   (seed,          "R.seed -> current generator seed")
1020 #undef GETSETNAME
1021   { 0 }
1022 };
1023
1024 static PyTypeObject dsarand_pytype_skel = {
1025   PyObject_HEAD_INIT(0) 0,              /* Header */
1026   "DSARand",                            /* @tp_name@ */
1027   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1028   0,                                    /* @tp_itemsize@ */
1029
1030   grand_pydealloc,                      /* @tp_dealloc@ */
1031   0,                                    /* @tp_print@ */
1032   0,                                    /* @tp_getattr@ */
1033   0,                                    /* @tp_setattr@ */
1034   0,                                    /* @tp_compare@ */
1035   0,                                    /* @tp_repr@ */
1036   0,                                    /* @tp_as_number@ */
1037   0,                                    /* @tp_as_sequence@ */
1038   0,                                    /* @tp_as_mapping@ */
1039   0,                                    /* @tp_hash@ */
1040   0,                                    /* @tp_call@ */
1041   0,                                    /* @tp_str@ */
1042   0,                                    /* @tp_getattro@ */
1043   0,                                    /* @tp_setattro@ */
1044   0,                                    /* @tp_as_buffer@ */
1045   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1046     Py_TPFLAGS_BASETYPE,
1047
1048   /* @tp_doc@ */
1049 "Pseudorandom number generator for constructing DSA parameters.",
1050
1051   0,                                    /* @tp_traverse@ */
1052   0,                                    /* @tp_clear@ */
1053   0,                                    /* @tp_richcompare@ */
1054   0,                                    /* @tp_weaklistoffset@ */
1055   0,                                    /* @tp_iter@ */
1056   0,                                    /* @tp_iternext@ */
1057   0,                                    /* @tp_methods@ */
1058   0,                                    /* @tp_members@ */
1059   dsarand_pygetset,                     /* @tp_getset@ */
1060   0,                                    /* @tp_base@ */
1061   0,                                    /* @tp_dict@ */
1062   0,                                    /* @tp_descr_get@ */
1063   0,                                    /* @tp_descr_set@ */
1064   0,                                    /* @tp_dictoffset@ */
1065   0,                                    /* @tp_init@ */
1066   PyType_GenericAlloc,                  /* @tp_alloc@ */
1067   dsarand_pynew,                        /* @tp_new@ */
1068   0,                                    /* @tp_free@ */
1069   0                                     /* @tp_is_gc@ */
1070 };
1071
1072 /*----- Blum-Blum-Shub generator ------------------------------------------*/
1073
1074 static PyObject *bbs_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1075 {
1076   mp *n = 0, *x = MP_TWO;
1077   PyObject *rc = 0;
1078   char *kwlist[] = { "n", "x", 0 };
1079
1080   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:new", kwlist,
1081                                    convmp, &n, convmp, &x))
1082     goto end;
1083   rc = grand_dopywrap(ty, bbs_rand(n, x), f_freeme);
1084 end:
1085   mp_drop(n);
1086   mp_drop(x);
1087   return (rc);
1088 }
1089
1090 static PyObject *bbsmeth_step(PyObject *me, PyObject *arg)
1091 {
1092   grand *r = GRAND_R(me); if (!PyArg_ParseTuple(arg, ":step")) return (0);
1093   r->ops->misc(r, BBS_STEP); RETURN_ME;
1094 }
1095
1096 static PyObject *bbsmeth_bits(PyObject *me, PyObject *arg)
1097 {
1098   grand *r = GRAND_R(me); unsigned n; uint32 w;
1099   if (!PyArg_ParseTuple(arg, "O&:bits", convuint, &n)) goto end;
1100   if (n > 32) VALERR("can't get more than 32 bits");
1101   r->ops->misc(r, BBS_BITS, n, &w); return (getulong(w));
1102 end:
1103   return (0);
1104 }
1105
1106 static PyObject *bbsmeth_wrap(PyObject *me, PyObject *arg)
1107 {
1108   grand *r = GRAND_R(me); if (!PyArg_ParseTuple(arg, ":wrap")) return (0);
1109   r->ops->misc(r, BBS_WRAP); RETURN_ME;
1110 }
1111
1112 static PyObject *bbsget_n(PyObject *me, void *hunoz)
1113 {
1114   mp *x = MP_NEW; grand *r = GRAND_R(me);
1115   r->ops->misc(r, BBS_MOD, &x); return (mp_pywrap(x));
1116 }
1117
1118 static PyObject *bbsget_x(PyObject *me, void *hunoz)
1119 {
1120   mp *x = MP_NEW; grand *r = GRAND_R(me);
1121   r->ops->misc(r, BBS_STATE, &x); return (mp_pywrap(x));
1122 }
1123
1124 static int bbsset_x(PyObject *me, PyObject *val, void *hunoz)
1125 {
1126   mp *x = 0; grand *r = GRAND_R(me); int rc = -1; if (!x) NIERR("__del__");
1127   if ((x = getmp(val)) == 0) goto end; r->ops->misc(r, BBS_SET, x); rc = 0;
1128   end: mp_drop(x); return (rc);
1129 }
1130
1131 static PyObject *bbsget_stepsz(PyObject *me, void *hunoz)
1132 {
1133   grand *r = GRAND_R(me);
1134   return (PyInt_FromLong(r->ops->misc(r, BBS_STEPSZ)));
1135 }
1136
1137 static PyMethodDef bbs_pymethods[] = {
1138 #define METHNAME(name) bbsmeth_##name
1139   METH  (step,  "R.step(): steps the generator (not useful)")
1140   METH  (bits,  "R.bits(N) -> W: returns N bits (<= 32) from the generator")
1141   METH  (wrap,  "R.wrap(): flushes unused bits in internal buffer")
1142 #undef METHNAME
1143   { 0 }
1144 };
1145
1146 static PyGetSetDef bbs_pygetset[] = {
1147 #define GETSETNAME(op, name) bbs##op##_##name
1148   GET   (n,             "R.n -> Blum modulus")
1149   GETSET(x,             "R.x -> current seed value")
1150   GET   (stepsz,        "R.stepsz -> number of bits generated per step")
1151 #undef GETSETNAME
1152   { 0 }
1153 };
1154
1155 static PyTypeObject bbs_pytype_skel = {
1156   PyObject_HEAD_INIT(0) 0,              /* Header */
1157   "BlumBlumShub",                       /* @tp_name@ */
1158   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1159   0,                                    /* @tp_itemsize@ */
1160
1161   grand_pydealloc,                      /* @tp_dealloc@ */
1162   0,                                    /* @tp_print@ */
1163   0,                                    /* @tp_getattr@ */
1164   0,                                    /* @tp_setattr@ */
1165   0,                                    /* @tp_compare@ */
1166   0,                                    /* @tp_repr@ */
1167   0,                                    /* @tp_as_number@ */
1168   0,                                    /* @tp_as_sequence@ */
1169   0,                                    /* @tp_as_mapping@ */
1170   0,                                    /* @tp_hash@ */
1171   0,                                    /* @tp_call@ */
1172   0,                                    /* @tp_str@ */
1173   0,                                    /* @tp_getattro@ */
1174   0,                                    /* @tp_setattro@ */
1175   0,                                    /* @tp_as_buffer@ */
1176   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1177     Py_TPFLAGS_BASETYPE,
1178
1179   /* @tp_doc@ */
1180 "Blum-Blum-Shub strong pseudorandom number generator.",
1181
1182   0,                                    /* @tp_traverse@ */
1183   0,                                    /* @tp_clear@ */
1184   0,                                    /* @tp_richcompare@ */
1185   0,                                    /* @tp_weaklistoffset@ */
1186   0,                                    /* @tp_iter@ */
1187   0,                                    /* @tp_iternext@ */
1188   bbs_pymethods,                        /* @tp_methods@ */
1189   0,                                    /* @tp_members@ */
1190   bbs_pygetset,                         /* @tp_getset@ */
1191   0,                                    /* @tp_base@ */
1192   0,                                    /* @tp_dict@ */
1193   0,                                    /* @tp_descr_get@ */
1194   0,                                    /* @tp_descr_set@ */
1195   0,                                    /* @tp_dictoffset@ */
1196   0,                                    /* @tp_init@ */
1197   PyType_GenericAlloc,                  /* @tp_alloc@ */
1198   bbs_pynew,                            /* @tp_new@ */
1199   0,                                    /* @tp_free@ */
1200   0                                     /* @tp_is_gc@ */
1201 };
1202
1203 typedef struct bbspriv_pyobj {
1204   grand_pyobj gr;
1205   bbs_priv bp;
1206 } bbspriv_pyobj;
1207
1208 #define BBSPRIV_BP(o) (&((bbspriv_pyobj *)(o))->bp)
1209
1210 static PyObject *bbspriv_pynew(PyTypeObject *ty,
1211                                PyObject *arg, PyObject *kw)
1212 {
1213   mp *p = 0, *q = 0, *n = 0, *x = MP_TWO;
1214   bbspriv_pyobj *rc = 0;
1215   char *kwlist[] = { "n", "p", "q", "seed", 0 };
1216
1217   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&O&O&:new", kwlist,
1218                                    convmp, &n, convmp, &p, convmp, &q,
1219                                    convmp, &x))
1220     goto end;
1221   if (!n + !p + !q > 1) VALERR("must specify at least two of n, p, q");
1222   if (!n) n = mp_mul(MP_NEW, p, q);
1223   else if (!p) mp_div(&p, 0, n, q);
1224   else if (!q) mp_div(&q, 0, n, p);
1225   rc = (bbspriv_pyobj *)ty->tp_alloc(ty, 0);
1226   rc->gr.r = bbs_rand(n, x);
1227   rc->gr.f = f_freeme;
1228   rc->bp.p = MP_COPY(p);
1229   rc->bp.q = MP_COPY(q);
1230   rc->bp.n = MP_COPY(n);
1231 end:
1232   mp_drop(p); mp_drop(q); mp_drop(n); mp_drop(x);
1233   return ((PyObject *)rc);
1234 }
1235
1236 static PyObject *meth__BBSPriv_generate(PyObject *me,
1237                                         PyObject *arg, PyObject *kw)
1238 {
1239   bbs_priv bp = { 0 };
1240   mp *x = MP_TWO;
1241   pgev evt = { 0 };
1242   unsigned nbits, n = 0;
1243   grand *r = &rand_global;
1244   char *kwlist[] = { "class", "nbits", "event", "rng", "nsteps", "seed", 0 };
1245   bbspriv_pyobj *rc = 0;
1246
1247   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&O&:generate", kwlist,
1248                                    &me, convuint, &nbits, convpgev, &evt,
1249                                    convgrand, &r, convuint, &n, convmp, &x))
1250     goto end;
1251   if (bbs_gen(&bp, nbits, r, n, evt.proc, evt.ctx))
1252     VALERR("prime genration failed");
1253   rc = PyObject_New(bbspriv_pyobj, bbspriv_pytype);
1254   rc->gr.r = bbs_rand(bp.n, x);
1255   rc->gr.f = f_freeme;
1256   rc->bp.p = MP_COPY(bp.p);
1257   rc->bp.q = MP_COPY(bp.q);
1258   rc->bp.n = MP_COPY(bp.n);
1259 end:
1260   mp_drop(bp.p); mp_drop(bp.q); mp_drop(bp.n); mp_drop(x);
1261   return ((PyObject *)rc);
1262 }
1263
1264 static void bbspriv_pydealloc(PyObject *me)
1265 {
1266   bbs_priv *bp = BBSPRIV_BP(me);
1267   mp_drop(bp->n);
1268   mp_drop(bp->p);
1269   mp_drop(bp->q);
1270   grand_pydealloc(me);
1271 }
1272
1273 static PyObject *bpmeth_ff(PyObject *me, PyObject *arg)
1274 {
1275   mp *n = 0; grand *r = GRAND_R(me); bbs_priv *bp = BBSPRIV_BP(me);
1276   if (!PyArg_ParseTuple(arg, "O&:ff", convmp, &n)) return (0);
1277   r->ops->misc(r, BBS_FF, bp, n); RETURN_ME;
1278 }
1279
1280 static PyObject *bpmeth_rew(PyObject *me, PyObject *arg)
1281 {
1282   mp *n = 0; grand *r = GRAND_R(me); bbs_priv *bp = BBSPRIV_BP(me);
1283   if (!PyArg_ParseTuple(arg, "O&:rew", convmp, &n)) return (0);
1284   r->ops->misc(r, BBS_REW, bp, n); RETURN_ME;
1285 }
1286
1287 static PyObject *bpget_n(PyObject *me, void *hunoz)
1288   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->n))); }
1289
1290 static PyObject *bpget_p(PyObject *me, void *hunoz)
1291   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->p))); }
1292
1293 static PyObject *bpget_q(PyObject *me, void *hunoz)
1294   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->q))); }
1295
1296 static PyMethodDef bbspriv_pymethods[] = {
1297 #define METHNAME(name) bpmeth_##name
1298   METH  (ff,                    "R.ff(N): fast-forward N places")
1299   METH  (rew,                   "R.rew(N): rewind N places")
1300 #undef METHNAME
1301   { 0 }
1302 };
1303
1304 static PyGetSetDef bbspriv_pygetset[] = {
1305 #define GETSETNAME(op, name) bp##op##_##name
1306   GET   (n,             "R.n -> Blum modulus")
1307   GET   (p,             "R.p -> one of the factors of the modulus")
1308   GET   (q,             "R.q -> one of the factors of the modulus")
1309 #undef GETSETNAME
1310   { 0 }
1311 };
1312
1313 static PyTypeObject bbspriv_pytype_skel = {
1314   PyObject_HEAD_INIT(0) 0,              /* Header */
1315   "BBSPriv",                            /* @tp_name@ */
1316   sizeof(bbspriv_pyobj),                /* @tp_basicsize@ */
1317   0,                                    /* @tp_itemsize@ */
1318
1319   bbspriv_pydealloc,                    /* @tp_dealloc@ */
1320   0,                                    /* @tp_print@ */
1321   0,                                    /* @tp_getattr@ */
1322   0,                                    /* @tp_setattr@ */
1323   0,                                    /* @tp_compare@ */
1324   0,                                    /* @tp_repr@ */
1325   0,                                    /* @tp_as_number@ */
1326   0,                                    /* @tp_as_sequence@ */
1327   0,                                    /* @tp_as_mapping@ */
1328   0,                                    /* @tp_hash@ */
1329   0,                                    /* @tp_call@ */
1330   0,                                    /* @tp_str@ */
1331   0,                                    /* @tp_getattro@ */
1332   0,                                    /* @tp_setattro@ */
1333   0,                                    /* @tp_as_buffer@ */
1334   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1335     Py_TPFLAGS_BASETYPE,
1336
1337   /* @tp_doc@ */
1338 "Blum-Blum-Shub strong pseudorandom generator, with private key.",
1339
1340   0,                                    /* @tp_traverse@ */
1341   0,                                    /* @tp_clear@ */
1342   0,                                    /* @tp_richcompare@ */
1343   0,                                    /* @tp_weaklistoffset@ */
1344   0,                                    /* @tp_iter@ */
1345   0,                                    /* @tp_iternext@ */
1346   bbspriv_pymethods,                    /* @tp_methods@ */
1347   0,                                    /* @tp_members@ */
1348   bbspriv_pygetset,                     /* @tp_getset@ */
1349   0,                                    /* @tp_base@ */
1350   0,                                    /* @tp_dict@ */
1351   0,                                    /* @tp_descr_get@ */
1352   0,                                    /* @tp_descr_set@ */
1353   0,                                    /* @tp_dictoffset@ */
1354   0,                                    /* @tp_init@ */
1355   PyType_GenericAlloc,                  /* @tp_alloc@ */
1356   bbspriv_pynew,                        /* @tp_new@ */
1357   0,                                    /* @tp_free@ */
1358   0                                     /* @tp_is_gc@ */
1359 };
1360
1361 /*----- Global stuff ------------------------------------------------------*/
1362
1363 static PyMethodDef methods[] = {
1364 #define METHNAME(name) meth_##name
1365   KWMETH(_BBSPriv_generate,             "\
1366 generate(NBITS, [event = pgen_nullev, rng = rand, nsteps = 0, seed = 2])")
1367 #undef METHNAME
1368   { 0 }
1369 };
1370
1371 void rand_pyinit(void)
1372 {
1373   INITTYPE(grand, root);
1374   INITTYPE(truerand, grand);
1375   INITTYPE(fibrand, grand);
1376   INITTYPE(lcrand, grand);
1377   INITTYPE(dsarand, grand);
1378   INITTYPE(bbs, grand);
1379   INITTYPE(bbspriv, bbs);
1380   INITTYPE(sslprf, grand);
1381   INITTYPE(tlsdx, grand);
1382   INITTYPE(tlsprf, grand);
1383   INITTYPE(gccrand, type);
1384   INITTYPE(gcrand, grand);
1385   rand_noisesrc(RAND_GLOBAL, &noise_source);
1386   rand_seed(RAND_GLOBAL, 160);
1387   addmethods(methods);
1388 }
1389
1390 #define gccrand gccrand_info
1391 GEN(gccrands, crand)
1392
1393 void rand_pyinsert(PyObject *mod)
1394 {
1395   INSERT("GRand", grand_pytype);
1396   INSERT("TrueRand", truerand_pytype);
1397   INSERT("LCRand", lcrand_pytype);
1398   INSERT("FibRand", fibrand_pytype);
1399   INSERT("SSLRand", sslprf_pytype);
1400   INSERT("TLSDataExpansion", tlsdx_pytype);
1401   INSERT("TLSPRF", tlsprf_pytype);
1402   INSERT("DSARand", dsarand_pytype);
1403   INSERT("BlumBlumShub", bbs_pytype);
1404   INSERT("BBSPriv", bbspriv_pytype);
1405   INSERT("GCCRand", gccrand_pytype);
1406   INSERT("GCRand", gcrand_pytype);
1407   rand_pyobj = grand_pywrap(&rand_global, 0); Py_INCREF(rand_pyobj);
1408   gccrands_dict = gccrands(); Py_INCREF(gccrands_dict);
1409   INSERT("gccrands", gccrands_dict);
1410   INSERT("rand", rand_pyobj);
1411 }
1412
1413 /*----- That's all, folks -------------------------------------------------*/