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 PUBLIC_SYMBOLS;
  31 #include "algorithms.h"
  32 PRIVATE_SYMBOLS;
  33
  34 /*----- Main code ---------------------------------------------------------*/
  35
  36 PyTypeObject *grand_pytype;
  37 static PyTypeObject *truerand_pytype;
  38 static PyTypeObject *lcrand_pytype, *fibrand_pytype;
  39 static PyTypeObject *dsarand_pytype, *bbs_pytype, *bbspriv_pytype;
  40 static PyTypeObject *sslprf_pytype, *tlsdx_pytype, *tlsprf_pytype;
  41 PyObject *rand_pyobj;
  42
  43 static PyObject *gccrands_dict;
  44
  45 static PyObject *grand_dopywrap(PyTypeObject *ty, grand *r, unsigned f)
  46 {
  47   grand_pyobj *g;
  48
  49   g = (grand_pyobj *)ty->tp_alloc(ty, 0);
  50   g->r = r;
  51   g->f = f;
  52   return ((PyObject *)g);
  53 }
  54
  55 PyObject *grand_pywrap(grand *r, unsigned f)
  56 {
  57   PyTypeObject *ty = grand_pytype;
  58   PyObject *ob;
  59
  60   if (STRCMP(r->ops->name, ==, "rand")) ty = truerand_pytype;
  61   else if (STRCMP(r->ops->name, ==, "lcrand")) ty = lcrand_pytype;
  62   else if (STRCMP(r->ops->name, ==, "fibrand")) ty = fibrand_pytype;
  63   else if (STRCMP(r->ops->name, ==, "dsarand")) ty = dsarand_pytype;
  64   else if (STRCMP(r->ops->name, ==, "bbs")) ty = bbs_pytype;
  65   else if (STRCMP(r->ops->name, ==, "sslprf")) ty = sslprf_pytype;
  66   else if (STRCMP(r->ops->name, ==, "tlsdx")) ty = tlsdx_pytype;
  67   else if (STRCMP(r->ops->name, ==, "tlsprf")) ty = tlsprf_pytype;
  68   else if ((ob = PyDict_GetItemString(gccrands_dict, r->ops->name)) != 0)
  69     ty = (PyTypeObject *)ob;
  70   return (grand_dopywrap(ty, r, f));
  71 }
  72
  73 CONVFUNC(grand, grand *, GRAND_R)
  74
  75 static int grand_check(PyObject *me)
  76 {
  77   if (!GRAND_R(me)) VALERR("random generator object is no longer valid");
  78   return (0);
  79 end:
  80   return (-1);
  81 }
  82
  83 static PyObject *grmeth_byte(PyObject *me)
  84 {
  85   if (grand_check(me)) return (0);
  86   return (PyInt_FromLong(grand_byte(GRAND_R(me))));
  87 }
  88
  89 static PyObject *grmeth_word(PyObject *me)
  90 {
  91   if (grand_check(me)) return (0);
  92   return (getulong(grand_word(GRAND_R(me))));
  93 }
  94
  95 static PyObject *grmeth_range(PyObject *me, PyObject *arg)
  96 {
  97   PyObject *m;
  98   mp *x = 0;
  99   mp *y = 0;
 100
 101   if (!PyArg_ParseTuple(arg, "O:range", &m)) return (0);
 102   if (grand_check(me)) return (0);
 103   if (PyInt_Check(m)) {
 104     long mm = PyInt_AS_LONG(m);
 105     if (mm <= 0)
 106       goto notpos;
 107     if (mm <= 0xffffffff)
 108       return (PyInt_FromLong(grand_range(GRAND_R(me), mm)));
 109   }
 110   if ((x = getmp(m)) == 0)
 111     goto end;
 112   if (!MP_POSP(x))
 113     goto notpos;
 114   y = mprand_range(MP_NEW, x, GRAND_R(me), 0);
 115   MP_DROP(x);
 116   return (mp_pywrap(y));
 117 notpos:
 118   VALERR("range must be strictly positive");
 119 end:
 120   if (x) MP_DROP(x);
 121   return (0);
 122 }
 123
 124 static PyObject *grmeth_mp(PyObject *me, PyObject *arg, PyObject *kw)
 125 {
 126   size_t l;
 127   mpw o = 0;
 128   static const char *const kwlist[] = { "bits", "or", 0 };
 129
 130   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:mp", KWLIST,
 131                                    convszt, &l, convmpw, &o))
 132     goto end;
 133   if (grand_check(me)) return (0);
 134   if (l < MPW_BITS && (o >> l)) VALERR("or mask too large");
 135   return (mp_pywrap(mprand(MP_NEW, l, GRAND_R(me), o)));
 136 end:
 137   return (0);
 138 }
 139
 140 static PyObject *grmeth_block(PyObject *me, PyObject *arg)
 141 {
 142   unsigned long n;
 143   PyObject *rc = 0;
 144
 145   if (!PyArg_ParseTuple(arg, "O&:block", convulong, &n)) goto end;
 146   if (grand_check(me)) return (0);
 147   rc = bytestring_pywrap(0, n);
 148   grand_fill(GRAND_R(me), PyString_AS_STRING(rc), n);
 149 end:
 150   return (rc);
 151 }
 152
 153 static int checkop(grand *r, unsigned op, const char *what)
 154 {
 155   if (r->ops->misc(r, GRAND_CHECK, op)) return (0);
 156   PyErr_Format(PyExc_TypeError, "operation %s not supported", what);
 157   return (-1);
 158 }
 159
 160 static PyObject *grmeth_seedint(PyObject *me, PyObject *arg)
 161 {
 162   int i;
 163   grand *r = GRAND_R(me);
 164   if (!PyArg_ParseTuple(arg, "i:seedint", &i) ||
 165       grand_check(me) || checkop(r, GRAND_SEEDINT, "seedint"))
 166     goto end;
 167   r->ops->misc(r, GRAND_SEEDINT, i);
 168   RETURN_ME;
 169 end:
 170   return (0);
 171 }
 172
 173 static PyObject *grmeth_seedword(PyObject *me, PyObject *arg)
 174 {
 175   uint32 u;
 176   grand *r = GRAND_R(me);
 177   if (!PyArg_ParseTuple(arg, "O&:seedword", convu32, &u) ||
 178       grand_check(me) || checkop(r, GRAND_SEEDUINT32, "seedword"))
 179     goto end;
 180   r->ops->misc(r, GRAND_SEEDUINT32, u);
 181   RETURN_ME;
 182 end:
 183   return (0);
 184 }
 185
 186 static PyObject *grmeth_seedblock(PyObject *me, PyObject *arg)
 187 {
 188   char *p;
 189   Py_ssize_t n;
 190   grand *r = GRAND_R(me);
 191   if (!PyArg_ParseTuple(arg, "s#:seedblock", &p, &n) ||
 192       grand_check(me) || checkop(r, GRAND_SEEDBLOCK, "seedblock"))
 193     goto end;
 194   r->ops->misc(r, GRAND_SEEDBLOCK, p, (size_t)n);
 195   RETURN_ME;
 196 end:
 197   return (0);
 198 }
 199
 200 static PyObject *grmeth_seedmp(PyObject *me, PyObject *arg)
 201 {
 202   PyObject *x;
 203   mp *xx;
 204   grand *r = GRAND_R(me);
 205   if (!PyArg_ParseTuple(arg, "O:seedmp", &x) ||
 206       grand_check(me) || checkop(r, GRAND_SEEDMP, "seedmp") ||
 207       (xx = getmp(x)) == 0)
 208     goto end;
 209   r->ops->misc(r, GRAND_SEEDMP, xx);
 210   MP_DROP(xx);
 211   RETURN_ME;
 212 end:
 213   return (0);
 214 }
 215
 216 static PyObject *grmeth_seedrand(PyObject *me, PyObject *arg, PyObject *kw)
 217 {
 218   static const char *const kwlist[] = { "rng", 0 };
 219   grand *r = GRAND_R(me);
 220   grand *rr = &rand_global;
 221   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:seedrand", KWLIST,
 222                                    convgrand, &rr) ||
 223       grand_check(me) || checkop(r, GRAND_SEEDRAND, "seedrand"))
 224     goto end;
 225   r->ops->misc(r, GRAND_SEEDRAND, rr);
 226   RETURN_ME;
 227 end:
 228   return (0);
 229 }
 230
 231 static PyObject *grmeth_mask(PyObject *me, PyObject *arg)
 232 {
 233   grand *r = GRAND_R(me);
 234   char *p, *q;
 235   Py_ssize_t sz;
 236   PyObject *rc;
 237
 238   if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) return (0);
 239   if (grand_check(me)) return (0);
 240   rc = bytestring_pywrap(0, sz);
 241   q = PyString_AS_STRING(rc);
 242   GR_FILL(r, q, sz);
 243   while (sz--) *q++ ^= *p++;
 244   return (rc);
 245 }
 246
 247 static void grand_pydealloc(PyObject *me)
 248 {
 249   grand_pyobj *g = (grand_pyobj *)me;
 250   if ((g->f & f_freeme) && g->r) GR_DESTROY(g->r);
 251   FREEOBJ(me);
 252 }
 253
 254 static PyObject *grget_name(PyObject *me, void *hunoz)
 255   { return (grand_check(me) ? 0 : PyString_FromString(GRAND_R(me)->ops->name)); }
 256
 257 static PyObject *grget_cryptop(PyObject *me, void *hunoz)
 258   { return (grand_check(me) ? 0 : getbool(GRAND_R(me)->ops->f & GRAND_CRYPTO)); }
 259
 260 static const PyGetSetDef grand_pygetset[] = {
 261 #define GETSETNAME(op, name) gr##op##_##name
 262   GET   (name,          "R.name -> name of this kind of generator")
 263   GET   (cryptop,       "R.cryptop -> flag: cryptographically strong?")
 264 #undef GETSETNAME
 265   { 0 }
 266 };
 267
 268 static const PyMethodDef grand_pymethods[] = {
 269 #define METHNAME(name) grmeth_##name
 270   NAMETH(byte,          "R.byte() -> BYTE")
 271   NAMETH(word,          "R.word() -> WORD")
 272   METH  (block,         "R.block(N) -> STRING")
 273   KWMETH(mp,            "R.mp(bits, [or = 0]) -> MP")
 274   METH  (range,         "R.range(MAX) -> INT")
 275   METH  (mask,          "R.mask(STR) -> STR")
 276   METH  (seedint,       "R.seedint(I)")
 277   METH  (seedword,      "R.seedword(I)")
 278   METH  (seedblock,     "R.seedblock(BYTES)")
 279   METH  (seedmp,        "R.seedmp(X)")
 280   KWMETH(seedrand,      "R.seedrand(RR)")
 281 #undef METHNAME
 282   { 0 }
 283 };
 284
 285 static const PyTypeObject grand_pytype_skel = {
 286   PyObject_HEAD_INIT(0) 0,              /* Header */
 287   "GRand",                              /* @tp_name@ */
 288   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 289   0,                                    /* @tp_itemsize@ */
 290
 291   grand_pydealloc,                      /* @tp_dealloc@ */
 292   0,                                    /* @tp_print@ */
 293   0,                                    /* @tp_getattr@ */
 294   0,                                    /* @tp_setattr@ */
 295   0,                                    /* @tp_compare@ */
 296   0,                                    /* @tp_repr@ */
 297   0,                                    /* @tp_as_number@ */
 298   0,                                    /* @tp_as_sequence@ */
 299   0,                                    /* @tp_as_mapping@ */
 300   0,                                    /* @tp_hash@ */
 301   0,                                    /* @tp_call@ */
 302   0,                                    /* @tp_str@ */
 303   0,                                    /* @tp_getattro@ */
 304   0,                                    /* @tp_setattro@ */
 305   0,                                    /* @tp_as_buffer@ */
 306   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 307     Py_TPFLAGS_BASETYPE,
 308
 309   /* @tp_doc@ */
 310   "Generic random number source.",
 311
 312   0,                                    /* @tp_traverse@ */
 313   0,                                    /* @tp_clear@ */
 314   0,                                    /* @tp_richcompare@ */
 315   0,                                    /* @tp_weaklistoffset@ */
 316   0,                                    /* @tp_iter@ */
 317   0,                                    /* @tp_iternext@ */
 318   PYMETHODS(grand),                     /* @tp_methods@ */
 319   0,                                    /* @tp_members@ */
 320   PYGETSET(grand),                      /* @tp_getset@ */
 321   0,                                    /* @tp_base@ */
 322   0,                                    /* @tp_dict@ */
 323   0,                                    /* @tp_descr_get@ */
 324   0,                                    /* @tp_descr_set@ */
 325   0,                                    /* @tp_dictoffset@ */
 326   0,                                    /* @tp_init@ */
 327   PyType_GenericAlloc,                  /* @tp_alloc@ */
 328   abstract_pynew,                       /* @tp_new@ */
 329   0,                                    /* @tp_free@ */
 330   0                                     /* @tp_is_gc@ */
 331 };
 332
 333 static PyObject *lcrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 334 {
 335   uint32 n = 0;
 336   static const char *const kwlist[] = { "seed", 0 };
 337   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convu32, &n))
 338     return (0);
 339   return (grand_dopywrap(lcrand_pytype, lcrand_create(n), f_freeme));
 340 }
 341
 342 static const PyTypeObject lcrand_pytype_skel = {
 343   PyObject_HEAD_INIT(0) 0,              /* Header */
 344   "LCRand",                             /* @tp_name@ */
 345   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 346   0,                                    /* @tp_itemsize@ */
 347
 348   grand_pydealloc,                      /* @tp_dealloc@ */
 349   0,                                    /* @tp_print@ */
 350   0,                                    /* @tp_getattr@ */
 351   0,                                    /* @tp_setattr@ */
 352   0,                                    /* @tp_compare@ */
 353   0,                                    /* @tp_repr@ */
 354   0,                                    /* @tp_as_number@ */
 355   0,                                    /* @tp_as_sequence@ */
 356   0,                                    /* @tp_as_mapping@ */
 357   0,                                    /* @tp_hash@ */
 358   0,                                    /* @tp_call@ */
 359   0,                                    /* @tp_str@ */
 360   0,                                    /* @tp_getattro@ */
 361   0,                                    /* @tp_setattro@ */
 362   0,                                    /* @tp_as_buffer@ */
 363   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 364     Py_TPFLAGS_BASETYPE,
 365
 366   /* @tp_doc@ */
 367   "LCRand([seed = 0]): linear congruential generator.",
 368
 369   0,                                    /* @tp_traverse@ */
 370   0,                                    /* @tp_clear@ */
 371   0,                                    /* @tp_richcompare@ */
 372   0,                                    /* @tp_weaklistoffset@ */
 373   0,                                    /* @tp_iter@ */
 374   0,                                    /* @tp_iternext@ */
 375   0,                                    /* @tp_methods@ */
 376   0,                                    /* @tp_members@ */
 377   0,                                    /* @tp_getset@ */
 378   0,                                    /* @tp_base@ */
 379   0,                                    /* @tp_dict@ */
 380   0,                                    /* @tp_descr_get@ */
 381   0,                                    /* @tp_descr_set@ */
 382   0,                                    /* @tp_dictoffset@ */
 383   0,                                    /* @tp_init@ */
 384   PyType_GenericAlloc,                  /* @tp_alloc@ */
 385   lcrand_pynew,                         /* @tp_new@ */
 386   0,                                    /* @tp_free@ */
 387   0                                     /* @tp_is_gc@ */
 388 };
 389
 390 static PyObject *fibrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 391 {
 392   uint32 n = 0;
 393   static const char *const kwlist[] = { "seed", 0 };
 394   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convu32, &n))
 395     return (0);
 396   return (grand_dopywrap(fibrand_pytype, fibrand_create(n), f_freeme));
 397 }
 398
 399 static const PyTypeObject fibrand_pytype_skel = {
 400   PyObject_HEAD_INIT(0) 0,              /* Header */
 401   "FibRand",                            /* @tp_name@ */
 402   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 403   0,                                    /* @tp_itemsize@ */
 404
 405   grand_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   "FibRand([seed = 0]): Fibonacci generator.",
 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   0,                                    /* @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   fibrand_pynew,                        /* @tp_new@ */
 443   0,                                    /* @tp_free@ */
 444   0                                     /* @tp_is_gc@ */
 445 };
 446
 447 /*----- True random generator ---------------------------------------------*/
 448
 449 static PyObject *trmeth_gate(PyObject *me)
 450   { grand *r = GRAND_R(me); r->ops->misc(GRAND_R(me), RAND_GATE); RETURN_ME; }
 451
 452 static PyObject *trmeth_stretch(PyObject *me)
 453   { grand *r = GRAND_R(me); r->ops->misc(r, RAND_STRETCH); RETURN_ME; }
 454
 455 static PyObject *trmeth_add(PyObject *me, PyObject *arg)
 456 {
 457   grand *r = GRAND_R(me);
 458   char *p; Py_ssize_t n; unsigned goodbits;
 459   if (!PyArg_ParseTuple(arg, "s#O&:add", &p, &n, convuint, &goodbits))
 460     return (0);
 461   r->ops->misc(r, RAND_ADD, p, (size_t)n, goodbits);
 462   RETURN_ME;
 463 }
 464
 465 static PyObject *trmeth_key(PyObject *me, PyObject *arg)
 466 {
 467   grand *r = GRAND_R(me);
 468   char *p; Py_ssize_t n;
 469   if (!PyArg_ParseTuple(arg, "s#:key", &p, &n)) return (0);
 470   r->ops->misc(r, RAND_KEY, p, (size_t)n);
 471   RETURN_ME;
 472 }
 473
 474 static PyObject *trmeth_seed(PyObject *me, PyObject *arg)
 475 {
 476   grand *r = GRAND_R(me);
 477   unsigned u;
 478   if (!PyArg_ParseTuple(arg, "O&:seed", convuint, &u)) return (0);
 479   if (u > RAND_IBITS) VALERR("pointlessly large");
 480   r->ops->misc(r, RAND_SEED, u);
 481   RETURN_ME;
 482 end:
 483   return (0);
 484 }
 485
 486 static PyObject *trmeth_timer(PyObject *me)
 487   { grand *r = GRAND_R(me); r->ops->misc(r, RAND_TIMER); RETURN_ME; }
 488
 489 static PyObject *truerand_pynew(PyTypeObject *ty,
 490                                 PyObject *arg, PyObject *kw)
 491 {
 492   static const char *const kwlist[] = { 0 };
 493   grand *r;
 494   PyObject *rc = 0;
 495   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) goto end;
 496   r = rand_create();
 497   r->ops->misc(r, RAND_NOISESRC, &noise_source);
 498   r->ops->misc(r, RAND_SEED, 160);
 499   rc = grand_dopywrap(ty, r, f_freeme);
 500 end:
 501   return (rc);
 502 }
 503
 504 static const PyMethodDef truerand_pymethods[] = {
 505 #define METHNAME(name) trmeth_##name
 506   NAMETH(gate,          "R.gate()")
 507   NAMETH(stretch,       "R.stretch()")
 508   METH  (key,           "R.key(BYTES)")
 509   METH  (seed,          "R.seed(NBITS)")
 510   METH  (add,           "R.add(BYTES, GOODBITS")
 511   NAMETH(timer,         "R.timer()")
 512 #undef METHNAME
 513   { 0 }
 514 };
 515
 516 static PyObject *trget_goodbits(PyObject *me, void *hunoz)
 517 {
 518   grand *r = GRAND_R(me);
 519   return (PyInt_FromLong(r->ops->misc(r, RAND_GOODBITS)));
 520 }
 521
 522 static const PyGetSetDef truerand_pygetset[] = {
 523 #define GETSETNAME(op, name) tr##op##_##name
 524   GET   (goodbits,      "R.goodbits -> good bits of entropy remaining")
 525 #undef GETSETNAME
 526   { 0 }
 527 };
 528
 529 static const PyTypeObject truerand_pytype_skel = {
 530   PyObject_HEAD_INIT(0) 0,              /* Header */
 531   "TrueRand",                           /* @tp_name@ */
 532   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 533   0,                                    /* @tp_itemsize@ */
 534
 535   grand_pydealloc,                      /* @tp_dealloc@ */
 536   0,                                    /* @tp_print@ */
 537   0,                                    /* @tp_getattr@ */
 538   0,                                    /* @tp_setattr@ */
 539   0,                                    /* @tp_compare@ */
 540   0,                                    /* @tp_repr@ */
 541   0,                                    /* @tp_as_number@ */
 542   0,                                    /* @tp_as_sequence@ */
 543   0,                                    /* @tp_as_mapping@ */
 544   0,                                    /* @tp_hash@ */
 545   0,                                    /* @tp_call@ */
 546   0,                                    /* @tp_str@ */
 547   0,                                    /* @tp_getattro@ */
 548   0,                                    /* @tp_setattro@ */
 549   0,                                    /* @tp_as_buffer@ */
 550   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 551     Py_TPFLAGS_BASETYPE,
 552
 553   /* @tp_doc@ */
 554   "TrueRand(): true random number source.",
 555
 556   0,                                    /* @tp_traverse@ */
 557   0,                                    /* @tp_clear@ */
 558   0,                                    /* @tp_richcompare@ */
 559   0,                                    /* @tp_weaklistoffset@ */
 560   0,                                    /* @tp_iter@ */
 561   0,                                    /* @tp_iternext@ */
 562   PYMETHODS(truerand),                  /* @tp_methods@ */
 563   0,                                    /* @tp_members@ */
 564   PYGETSET(truerand),                   /* @tp_getset@ */
 565   0,                                    /* @tp_base@ */
 566   0,                                    /* @tp_dict@ */
 567   0,                                    /* @tp_descr_get@ */
 568   0,                                    /* @tp_descr_set@ */
 569   0,                                    /* @tp_dictoffset@ */
 570   0,                                    /* @tp_init@ */
 571   PyType_GenericAlloc,                  /* @tp_alloc@ */
 572   truerand_pynew,                       /* @tp_new@ */
 573   0,                                    /* @tp_free@ */
 574   0                                     /* @tp_is_gc@ */
 575 };
 576
 577 /*----- Generators from symmetric encryption algorithms -------------------*/
 578
 579 static PyTypeObject *gccrand_pytype, *gcrand_pytype, *gclatinrand_pytype;
 580
 581 typedef grand *gcrand_func(const void *, size_t sz);
 582 typedef grand *gcirand_func(const void *, size_t sz, uint32);
 583 typedef grand *gcnrand_func(const void *, size_t sz, const void *);
 584 typedef grand *gcshakerand_func(const void *, size_t,
 585                                 const void *, size_t,
 586                                 const void *, size_t);
 587 typedef grand *gcshafuncrand_func(const void *, size_t,
 588                                   const void *, size_t);
 589 typedef grand *gckmacrand_func(const void *, size_t, const void *, size_t);
 590 typedef struct gccrand_info {
 591   const char *name;
 592   const octet *keysz;
 593   unsigned f;
 594   size_t noncesz;
 595   gcrand_func *func;
 596 } gccrand_info;
 597
 598 #define RNGF_MASK 255u
 599
 600 enum {
 601   RNG_PLAIN = 0,
 602   RNG_SEAL,
 603   RNG_LATIN,
 604   RNG_SHAKE,
 605   RNG_KMAC
 606 };
 607
 608 typedef struct gccrand_pyobj {
 609   PyHeapTypeObject ty;
 610   const gccrand_info *info;
 611 } gccrand_pyobj;
 612 #define GCCRAND_INFO(o) (((gccrand_pyobj *)(o))->info)
 613
 614 #define GCCRAND_DEF(name, ksz, func, f, nsz)                            \
 615   static const gccrand_info func##_info =                               \
 616     { name, ksz, f, nsz, (gcrand_func *)func };
 617 RNGS(GCCRAND_DEF)
 618
 619 static const gccrand_info *const gcrandtab[] = {
 620 #define GCCRAND_ENTRY(name, ksz, func, f, nsz) &func##_info,
 621   RNGS(GCCRAND_ENTRY)
 622   0
 623 };
 624
 625 static PyObject *gcrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 626 {
 627   const gccrand_info *info = GCCRAND_INFO(ty);
 628   static const char *const kwlist[] = { "key", 0 };
 629   char *k;
 630   Py_ssize_t n;
 631
 632   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &n))
 633     goto end;
 634   if (keysz(n, info->keysz) != n) VALERR("bad key length");
 635   return (grand_dopywrap(ty, info->func(k, n), f_freeme));
 636 end:
 637   return (0);
 638 }
 639
 640 static PyObject *gcirand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 641 {
 642   const gccrand_info *info = GCCRAND_INFO(ty);
 643   uint32 i = 0;
 644   static const char *const kwlist[] = { "key", "i", 0 };
 645   char *k;
 646   Py_ssize_t n;
 647
 648   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&:new", KWLIST,
 649                                    &k, &n, convu32, &i))
 650     goto end;
 651   if (keysz(n, info->keysz) != n) VALERR("bad key length");
 652   return (grand_dopywrap(ty,
 653                          ((gcirand_func *)info->func)(k, n, i),
 654                          f_freeme));
 655 end:
 656   return (0);
 657 }
 658
 659 static PyObject *gcnrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 660 {
 661   const gccrand_info *info = GCCRAND_INFO(ty);
 662   static const char *const kwlist[] = { "key", "nonce", 0 };
 663   char *k, *n;
 664   Py_ssize_t ksz, nsz;
 665
 666   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#:new", KWLIST,
 667                                    &k, &ksz, &n, &nsz))
 668     goto end;
 669   if (keysz(ksz, info->keysz) != ksz) VALERR("bad key length");
 670   if (nsz != info->noncesz) VALERR("bad nonce length");
 671   return (grand_dopywrap(ty,
 672                          ((gcnrand_func *)info->func)(k, ksz, n),
 673                          f_freeme));
 674 end:
 675   return (0);
 676 }
 677
 678 static PyObject *gcshakyrand_pynew(PyTypeObject *ty,
 679                                    PyObject *arg, PyObject *kw)
 680 {
 681   const gccrand_info *info = GCCRAND_INFO(ty);
 682   static const char
 683     *const kwlist_shake[] = { "key", "func", "perso", 0 },
 684     *const kwlist_func[] = { "key", "perso", 0 };
 685   char *k, *f = 0, *p = 0;
 686   Py_ssize_t ksz, fsz = 0, psz = 0;
 687
 688   if ((info->f&RNGF_MASK) == RNG_SHAKE
 689         ? !PyArg_ParseTupleAndKeywords(arg, kw, "s#|s#s#:new",
 690                                        (/*unconst*/ char **)kwlist_shake,
 691                                        &k, &ksz, &f, &fsz, &p, &psz)
 692         : !PyArg_ParseTupleAndKeywords(arg, kw, "s#|s#:new",
 693                                        (/*unconst*/ char **)kwlist_func,
 694                                        &k, &ksz, &p, &psz))
 695     goto end;
 696   if (keysz(ksz, info->keysz) != ksz) VALERR("bad key length");
 697   return (grand_dopywrap(ty,
 698                          (info->f&RNGF_MASK) == RNG_SHAKE
 699                            ? ((gcshakerand_func *)info->func)(f, fsz,
 700                                                               p, psz,
 701                                                               k, ksz)
 702                            : ((gcshafuncrand_func *)info->func)(p, psz,
 703                                                                 k, ksz),
 704                          f_freeme));
 705 end:
 706   return (0);
 707 }
 708
 709 static PyObject *gccrand_pywrap(const gccrand_info *info)
 710 {
 711   gccrand_pyobj *g = newtype(gccrand_pytype, 0, info->name);
 712   g->info = info;
 713   g->ty.ht_type.tp_basicsize = sizeof(grand_pyobj);
 714   switch (info->f&RNGF_MASK) {
 715     case RNG_LATIN: g->ty.ht_type.tp_base = gclatinrand_pytype; break;
 716     default: g->ty.ht_type.tp_base = gcrand_pytype; break;
 717   }
 718   Py_INCREF(g->ty.ht_type.tp_base);
 719   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 720                             Py_TPFLAGS_BASETYPE |
 721                             Py_TPFLAGS_HEAPTYPE);
 722   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 723   g->ty.ht_type.tp_free = 0;
 724   switch (info->f&RNGF_MASK) {
 725     case RNG_LATIN: g->ty.ht_type.tp_new = gcnrand_pynew; break;
 726     case RNG_SEAL: g->ty.ht_type.tp_new = gcirand_pynew; break;
 727     case RNG_SHAKE: case RNG_KMAC:
 728       g->ty.ht_type.tp_new = gcshakyrand_pynew; break;
 729     default: g->ty.ht_type.tp_new = gcrand_pynew; break;
 730   }
 731   typeready(&g->ty.ht_type);
 732   return ((PyObject *)g);
 733 }
 734
 735 static PyObject *gccrget_name(PyObject *me, void *hunoz)
 736   { return (PyString_FromString(GCCRAND_INFO(me)->name)); }
 737 static PyObject *gccrget_keysz(PyObject *me, void *hunoz)
 738   { return (keysz_pywrap(GCCRAND_INFO(me)->keysz)); }
 739
 740 static PyObject *gclrmeth_tell(PyObject *me)
 741 {
 742   grand *r = GRAND_R(me);
 743   PyObject *rc = 0;
 744   kludge64 off;
 745
 746   r->ops->misc(r, SALSA20_TELLU64, &off);
 747   rc = getk64(off);
 748   return (rc);
 749 }
 750
 751 static PyObject *gclrmeth_seek(PyObject *me, PyObject *arg)
 752 {
 753   grand *r = GRAND_R(me);
 754   kludge64 off;
 755
 756   if (!PyArg_ParseTuple(arg, "O&:seek", convk64, &off)) return (0);
 757   r->ops->misc(r, SALSA20_SEEKU64, off);
 758   RETURN_ME;
 759 }
 760
 761 static const PyGetSetDef gccrand_pygetset[] = {
 762 #define GETSETNAME(op, name) gccr##op##_##name
 763   GET   (keysz,         "CR.keysz -> acceptable key sizes")
 764   GET   (name,          "CR.name -> name of this kind of generator")
 765 #undef GETSETNAME
 766   { 0 }
 767 };
 768
 769 static const PyMethodDef gclatinrand_pymethods[] = {
 770 #define METHNAME(name) gclrmeth_##name
 771   NAMETH(tell,          "R.tell() -> OFF")
 772   METH  (seek,          "R.seek(OFF)")
 773 #undef METHNAME
 774   { 0 }
 775 };
 776
 777 static const PyTypeObject gccrand_pytype_skel = {
 778   PyObject_HEAD_INIT(0) 0,              /* Header */
 779   "GCCRand",                            /* @tp_name@ */
 780   sizeof(gccrand_pyobj),                /* @tp_basicsize@ */
 781   0,                                    /* @tp_itemsize@ */
 782
 783   0,                                    /* @tp_dealloc@ */
 784   0,                                    /* @tp_print@ */
 785   0,                                    /* @tp_getattr@ */
 786   0,                                    /* @tp_setattr@ */
 787   0,                                    /* @tp_compare@ */
 788   0,                                    /* @tp_repr@ */
 789   0,                                    /* @tp_as_number@ */
 790   0,                                    /* @tp_as_sequence@ */
 791   0,                                    /* @tp_as_mapping@ */
 792   0,                                    /* @tp_hash@ */
 793   0,                                    /* @tp_call@ */
 794   0,                                    /* @tp_str@ */
 795   0,                                    /* @tp_getattro@ */
 796   0,                                    /* @tp_setattro@ */
 797   0,                                    /* @tp_as_buffer@ */
 798   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 799     Py_TPFLAGS_BASETYPE,
 800
 801   /* @tp_doc@ */
 802   "Metaclass for symmetric crypto-based generators.",
 803
 804   0,                                    /* @tp_traverse@ */
 805   0,                                    /* @tp_clear@ */
 806   0,                                    /* @tp_richcompare@ */
 807   0,                                    /* @tp_weaklistoffset@ */
 808   0,                                    /* @tp_iter@ */
 809   0,                                    /* @tp_iternext@ */
 810   0,                                    /* @tp_methods@ */
 811   0,                                    /* @tp_members@ */
 812   PYGETSET(gccrand),                    /* @tp_getset@ */
 813   0,                                    /* @tp_base@ */
 814   0,                                    /* @tp_dict@ */
 815   0,                                    /* @tp_descr_get@ */
 816   0,                                    /* @tp_descr_set@ */
 817   0,                                    /* @tp_dictoffset@ */
 818   0,                                    /* @tp_init@ */
 819   PyType_GenericAlloc,                  /* @tp_alloc@ */
 820   abstract_pynew,                       /* @tp_new@ */
 821   0,                                    /* @tp_free@ */
 822   0                                     /* @tp_is_gc@ */
 823 };
 824
 825 static const PyTypeObject gcrand_pytype_skel = {
 826   PyObject_HEAD_INIT(0) 0,              /* Header */
 827   "GCRand",                             /* @tp_name@ */
 828   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 829   0,                                    /* @tp_itemsize@ */
 830
 831   grand_pydealloc,                      /* @tp_dealloc@ */
 832   0,                                    /* @tp_print@ */
 833   0,                                    /* @tp_getattr@ */
 834   0,                                    /* @tp_setattr@ */
 835   0,                                    /* @tp_compare@ */
 836   0,                                    /* @tp_repr@ */
 837   0,                                    /* @tp_as_number@ */
 838   0,                                    /* @tp_as_sequence@ */
 839   0,                                    /* @tp_as_mapping@ */
 840   0,                                    /* @tp_hash@ */
 841   0,                                    /* @tp_call@ */
 842   0,                                    /* @tp_str@ */
 843   0,                                    /* @tp_getattro@ */
 844   0,                                    /* @tp_setattro@ */
 845   0,                                    /* @tp_as_buffer@ */
 846   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 847     Py_TPFLAGS_BASETYPE,
 848
 849   /* @tp_doc@ */
 850   "Abstract base class for symmetric crypto-based generators.",
 851
 852   0,                                    /* @tp_traverse@ */
 853   0,                                    /* @tp_clear@ */
 854   0,                                    /* @tp_richcompare@ */
 855   0,                                    /* @tp_weaklistoffset@ */
 856   0,                                    /* @tp_iter@ */
 857   0,                                    /* @tp_iternext@ */
 858   0,                                    /* @tp_methods@ */
 859   0,                                    /* @tp_members@ */
 860   0,                                    /* @tp_getset@ */
 861   0,                                    /* @tp_base@ */
 862   0,                                    /* @tp_dict@ */
 863   0,                                    /* @tp_descr_get@ */
 864   0,                                    /* @tp_descr_set@ */
 865   0,                                    /* @tp_dictoffset@ */
 866   0,                                    /* @tp_init@ */
 867   PyType_GenericAlloc,                  /* @tp_alloc@ */
 868   abstract_pynew,                       /* @tp_new@ */
 869   0,                                    /* @tp_free@ */
 870   0                                     /* @tp_is_gc@ */
 871 };
 872
 873 static const PyTypeObject gclatinrand_pytype_skel = {
 874   PyObject_HEAD_INIT(0) 0,              /* Header */
 875   "GCLatinRand",                        /* @tp_name@ */
 876   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 877   0,                                    /* @tp_itemsize@ */
 878
 879   grand_pydealloc,                      /* @tp_dealloc@ */
 880   0,                                    /* @tp_print@ */
 881   0,                                    /* @tp_getattr@ */
 882   0,                                    /* @tp_setattr@ */
 883   0,                                    /* @tp_compare@ */
 884   0,                                    /* @tp_repr@ */
 885   0,                                    /* @tp_as_number@ */
 886   0,                                    /* @tp_as_sequence@ */
 887   0,                                    /* @tp_as_mapping@ */
 888   0,                                    /* @tp_hash@ */
 889   0,                                    /* @tp_call@ */
 890   0,                                    /* @tp_str@ */
 891   0,                                    /* @tp_getattro@ */
 892   0,                                    /* @tp_setattro@ */
 893   0,                                    /* @tp_as_buffer@ */
 894   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 895     Py_TPFLAGS_BASETYPE,
 896
 897   /* @tp_doc@ */
 898   "Abstract base class for symmetric crypto-based generators.",
 899
 900   0,                                    /* @tp_traverse@ */
 901   0,                                    /* @tp_clear@ */
 902   0,                                    /* @tp_richcompare@ */
 903   0,                                    /* @tp_weaklistoffset@ */
 904   0,                                    /* @tp_iter@ */
 905   0,                                    /* @tp_iternext@ */
 906   PYMETHODS(gclatinrand),               /* @tp_methods@ */
 907   0,                                    /* @tp_members@ */
 908   0,                                    /* @tp_getset@ */
 909   0,                                    /* @tp_base@ */
 910   0,                                    /* @tp_dict@ */
 911   0,                                    /* @tp_descr_get@ */
 912   0,                                    /* @tp_descr_set@ */
 913   0,                                    /* @tp_dictoffset@ */
 914   0,                                    /* @tp_init@ */
 915   PyType_GenericAlloc,                  /* @tp_alloc@ */
 916   abstract_pynew,                       /* @tp_new@ */
 917   0,                                    /* @tp_free@ */
 918   0                                     /* @tp_is_gc@ */
 919 };
 920
 921 /*----- SSL and TLS generators --------------------------------------------*/
 922
 923 static PyObject *sslprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 924 {
 925   char *k, *s;
 926   Py_ssize_t ksz, ssz;
 927   const gchash *hco = &md5, *hci = &sha;
 928   PyObject *rc = 0;
 929   static const char *const kwlist[] = { "key", "seed", "ohash", "ihash", 0 };
 930
 931   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&O&:new", KWLIST,
 932                                    &k, &ksz, &s, &ssz,
 933                                    convgchash, &hco, convgchash, &hci))
 934     goto end;
 935   rc = grand_dopywrap(ty, sslprf_rand(hco, hci, k, ksz, s, ssz), f_freeme);
 936 end:
 937   return (rc);
 938 }
 939
 940 static PyObject *tlsdx_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 941 {
 942   char *k, *s;
 943   Py_ssize_t ksz, ssz;
 944   const gcmac *mc = &sha_hmac;
 945   PyObject *rc = 0;
 946   static const char *const kwlist[] = { "key", "seed", "mac", 0 };
 947
 948   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&:new", KWLIST,
 949                                    &k, &ksz, &s, &ssz,
 950                                    convgcmac, &mc))
 951     goto end;
 952   rc = grand_dopywrap(ty, tlsdx_rand(mc, k, ksz, s, ssz), f_freeme);
 953 end:
 954   return (rc);
 955 }
 956
 957 static PyObject *tlsprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 958 {
 959   char *k, *s;
 960   Py_ssize_t ksz, ssz;
 961   const gcmac *mcl = &md5_hmac, *mcr = &sha_hmac;
 962   PyObject *rc = 0;
 963   static const char *const kwlist[] = { "key", "seed", "lmac", "rmac", 0 };
 964
 965   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|O&O&:new", KWLIST,
 966                                    &k, &ksz, &s, &ssz,
 967                                    convgcmac, &mcl, convgcmac, &mcr))
 968     goto end;
 969   rc = grand_dopywrap(ty, tlsprf_rand(mcl, mcr, k, ksz, s, ssz), f_freeme);
 970 end:
 971   return (rc);
 972 }
 973
 974 static const PyTypeObject sslprf_pytype_skel = {
 975   PyObject_HEAD_INIT(0) 0,              /* Header */
 976   "SSLRand",                            /* @tp_name@ */
 977   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 978   0,                                    /* @tp_itemsize@ */
 979
 980   grand_pydealloc,                      /* @tp_dealloc@ */
 981   0,                                    /* @tp_print@ */
 982   0,                                    /* @tp_getattr@ */
 983   0,                                    /* @tp_setattr@ */
 984   0,                                    /* @tp_compare@ */
 985   0,                                    /* @tp_repr@ */
 986   0,                                    /* @tp_as_number@ */
 987   0,                                    /* @tp_as_sequence@ */
 988   0,                                    /* @tp_as_mapping@ */
 989   0,                                    /* @tp_hash@ */
 990   0,                                    /* @tp_call@ */
 991   0,                                    /* @tp_str@ */
 992   0,                                    /* @tp_getattro@ */
 993   0,                                    /* @tp_setattro@ */
 994   0,                                    /* @tp_as_buffer@ */
 995   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 996     Py_TPFLAGS_BASETYPE,
 997
 998   /* @tp_doc@ */
 999   "SSLRand(KEY, SEED, [ohash = md5], [ihash = sha]):\n"
1000   "  RNG for SSL master secret.",
1001
1002   0,                                    /* @tp_traverse@ */
1003   0,                                    /* @tp_clear@ */
1004   0,                                    /* @tp_richcompare@ */
1005   0,                                    /* @tp_weaklistoffset@ */
1006   0,                                    /* @tp_iter@ */
1007   0,                                    /* @tp_iternext@ */
1008   0,                                    /* @tp_methods@ */
1009   0,                                    /* @tp_members@ */
1010   0,                                    /* @tp_getset@ */
1011   0,                                    /* @tp_base@ */
1012   0,                                    /* @tp_dict@ */
1013   0,                                    /* @tp_descr_get@ */
1014   0,                                    /* @tp_descr_set@ */
1015   0,                                    /* @tp_dictoffset@ */
1016   0,                                    /* @tp_init@ */
1017   PyType_GenericAlloc,                  /* @tp_alloc@ */
1018   sslprf_pynew,                         /* @tp_new@ */
1019   0,                                    /* @tp_free@ */
1020   0                                     /* @tp_is_gc@ */
1021 };
1022
1023 static const PyTypeObject tlsdx_pytype_skel = {
1024   PyObject_HEAD_INIT(0) 0,              /* Header */
1025   "TLSDataExpansion",                   /* @tp_name@ */
1026   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1027   0,                                    /* @tp_itemsize@ */
1028
1029   grand_pydealloc,                      /* @tp_dealloc@ */
1030   0,                                    /* @tp_print@ */
1031   0,                                    /* @tp_getattr@ */
1032   0,                                    /* @tp_setattr@ */
1033   0,                                    /* @tp_compare@ */
1034   0,                                    /* @tp_repr@ */
1035   0,                                    /* @tp_as_number@ */
1036   0,                                    /* @tp_as_sequence@ */
1037   0,                                    /* @tp_as_mapping@ */
1038   0,                                    /* @tp_hash@ */
1039   0,                                    /* @tp_call@ */
1040   0,                                    /* @tp_str@ */
1041   0,                                    /* @tp_getattro@ */
1042   0,                                    /* @tp_setattro@ */
1043   0,                                    /* @tp_as_buffer@ */
1044   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1045     Py_TPFLAGS_BASETYPE,
1046
1047   /* @tp_doc@ */
1048   "TLSDataExpansion(KEY, SEED, [mac = sha_hmac]):\n"
1049   "  TLS data expansion function.",
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   0,                                    /* @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   tlsdx_pynew,                          /* @tp_new@ */
1068   0,                                    /* @tp_free@ */
1069   0                                     /* @tp_is_gc@ */
1070 };
1071
1072 static const PyTypeObject tlsprf_pytype_skel = {
1073   PyObject_HEAD_INIT(0) 0,              /* Header */
1074   "TLSPRF",                             /* @tp_name@ */
1075   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1076   0,                                    /* @tp_itemsize@ */
1077
1078   grand_pydealloc,                      /* @tp_dealloc@ */
1079   0,                                    /* @tp_print@ */
1080   0,                                    /* @tp_getattr@ */
1081   0,                                    /* @tp_setattr@ */
1082   0,                                    /* @tp_compare@ */
1083   0,                                    /* @tp_repr@ */
1084   0,                                    /* @tp_as_number@ */
1085   0,                                    /* @tp_as_sequence@ */
1086   0,                                    /* @tp_as_mapping@ */
1087   0,                                    /* @tp_hash@ */
1088   0,                                    /* @tp_call@ */
1089   0,                                    /* @tp_str@ */
1090   0,                                    /* @tp_getattro@ */
1091   0,                                    /* @tp_setattro@ */
1092   0,                                    /* @tp_as_buffer@ */
1093   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1094     Py_TPFLAGS_BASETYPE,
1095
1096   /* @tp_doc@ */
1097   "TLSPRF(KEY, SEED, [lmac = md5_hmac], [rmac = sha_hmac]):\n"
1098   "  TLS pseudorandom function.",
1099
1100   0,                                    /* @tp_traverse@ */
1101   0,                                    /* @tp_clear@ */
1102   0,                                    /* @tp_richcompare@ */
1103   0,                                    /* @tp_weaklistoffset@ */
1104   0,                                    /* @tp_iter@ */
1105   0,                                    /* @tp_iternext@ */
1106   0,                                    /* @tp_methods@ */
1107   0,                                    /* @tp_members@ */
1108   0,                                    /* @tp_getset@ */
1109   0,                                    /* @tp_base@ */
1110   0,                                    /* @tp_dict@ */
1111   0,                                    /* @tp_descr_get@ */
1112   0,                                    /* @tp_descr_set@ */
1113   0,                                    /* @tp_dictoffset@ */
1114   0,                                    /* @tp_init@ */
1115   PyType_GenericAlloc,                  /* @tp_alloc@ */
1116   tlsprf_pynew,                         /* @tp_new@ */
1117   0,                                    /* @tp_free@ */
1118   0                                     /* @tp_is_gc@ */
1119 };
1120
1121 /*----- DSA generator -----------------------------------------------------*/
1122
1123 static PyObject *dsarand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1124 {
1125   char *p;
1126   Py_ssize_t sz;
1127   PyObject *rc = 0;
1128   static const char *const kwlist[] = { "seed", 0 };
1129
1130   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &p, &sz))
1131     goto end;
1132   rc = grand_dopywrap(ty, dsarand_create(p, sz), f_freeme);
1133 end:
1134   return (rc);
1135 }
1136
1137 static PyObject *drget_seed(PyObject *me, void *hunoz)
1138 {
1139   grand *r = GRAND_R(me);
1140   int n = r->ops->misc(r, DSARAND_SEEDSZ);
1141   PyObject *rc = bytestring_pywrap(0, n);
1142   r->ops->misc(r, DSARAND_GETSEED, PyString_AS_STRING(rc));
1143   return (rc);
1144 }
1145
1146 static const PyGetSetDef dsarand_pygetset[] = {
1147 #define GETSETNAME(op, name) dr##op##_##name
1148   GET   (seed,          "R.seed -> current generator seed")
1149 #undef GETSETNAME
1150   { 0 }
1151 };
1152
1153 static const PyTypeObject dsarand_pytype_skel = {
1154   PyObject_HEAD_INIT(0) 0,              /* Header */
1155   "DSARand",                            /* @tp_name@ */
1156   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1157   0,                                    /* @tp_itemsize@ */
1158
1159   grand_pydealloc,                      /* @tp_dealloc@ */
1160   0,                                    /* @tp_print@ */
1161   0,                                    /* @tp_getattr@ */
1162   0,                                    /* @tp_setattr@ */
1163   0,                                    /* @tp_compare@ */
1164   0,                                    /* @tp_repr@ */
1165   0,                                    /* @tp_as_number@ */
1166   0,                                    /* @tp_as_sequence@ */
1167   0,                                    /* @tp_as_mapping@ */
1168   0,                                    /* @tp_hash@ */
1169   0,                                    /* @tp_call@ */
1170   0,                                    /* @tp_str@ */
1171   0,                                    /* @tp_getattro@ */
1172   0,                                    /* @tp_setattro@ */
1173   0,                                    /* @tp_as_buffer@ */
1174   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1175     Py_TPFLAGS_BASETYPE,
1176
1177   /* @tp_doc@ */
1178   "DSARand(SEED): pseudorandom number generator for DSA parameters.",
1179
1180   0,                                    /* @tp_traverse@ */
1181   0,                                    /* @tp_clear@ */
1182   0,                                    /* @tp_richcompare@ */
1183   0,                                    /* @tp_weaklistoffset@ */
1184   0,                                    /* @tp_iter@ */
1185   0,                                    /* @tp_iternext@ */
1186   0,                                    /* @tp_methods@ */
1187   0,                                    /* @tp_members@ */
1188   PYGETSET(dsarand),                    /* @tp_getset@ */
1189   0,                                    /* @tp_base@ */
1190   0,                                    /* @tp_dict@ */
1191   0,                                    /* @tp_descr_get@ */
1192   0,                                    /* @tp_descr_set@ */
1193   0,                                    /* @tp_dictoffset@ */
1194   0,                                    /* @tp_init@ */
1195   PyType_GenericAlloc,                  /* @tp_alloc@ */
1196   dsarand_pynew,                        /* @tp_new@ */
1197   0,                                    /* @tp_free@ */
1198   0                                     /* @tp_is_gc@ */
1199 };
1200
1201 /*----- Blum-Blum-Shub generator ------------------------------------------*/
1202
1203 static PyObject *bbs_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1204 {
1205   mp *n = 0, *x = MP_TWO;
1206   PyObject *rc = 0;
1207   static const char *const kwlist[] = { "n", "x", 0 };
1208
1209   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:new", KWLIST,
1210                                    convmp, &n, convmp, &x))
1211     goto end;
1212   rc = grand_dopywrap(ty, bbs_rand(n, x), f_freeme);
1213 end:
1214   mp_drop(n);
1215   mp_drop(x);
1216   return (rc);
1217 }
1218
1219 static PyObject *bbsmeth_step(PyObject *me)
1220   { grand *r = GRAND_R(me); r->ops->misc(r, BBS_STEP); RETURN_ME; }
1221
1222 static PyObject *bbsmeth_bits(PyObject *me, PyObject *arg)
1223 {
1224   grand *r = GRAND_R(me); unsigned n; uint32 w;
1225   if (!PyArg_ParseTuple(arg, "O&:bits", convuint, &n)) goto end;
1226   if (n > 32) VALERR("can't get more than 32 bits");
1227   r->ops->misc(r, BBS_BITS, n, &w); return (getulong(w));
1228 end:
1229   return (0);
1230 }
1231
1232 static PyObject *bbsmeth_wrap(PyObject *me)
1233   { grand *r = GRAND_R(me); r->ops->misc(r, BBS_WRAP); RETURN_ME; }
1234
1235 static PyObject *bbsget_n(PyObject *me, void *hunoz)
1236 {
1237   mp *x = MP_NEW; grand *r = GRAND_R(me);
1238   r->ops->misc(r, BBS_MOD, &x); return (mp_pywrap(x));
1239 }
1240
1241 static PyObject *bbsget_x(PyObject *me, void *hunoz)
1242 {
1243   mp *x = MP_NEW; grand *r = GRAND_R(me);
1244   r->ops->misc(r, BBS_STATE, &x); return (mp_pywrap(x));
1245 }
1246
1247 static int bbsset_x(PyObject *me, PyObject *val, void *hunoz)
1248 {
1249   mp *x = 0; grand *r = GRAND_R(me); int rc = -1; if (!val) NIERR("__del__");
1250   if ((x = getmp(val)) == 0) goto end;
1251   r->ops->misc(r, BBS_SET, x); rc = 0;
1252   end: mp_drop(x); return (rc);
1253 }
1254
1255 static PyObject *bbsget_stepsz(PyObject *me, void *hunoz)
1256 {
1257   grand *r = GRAND_R(me);
1258   return (PyInt_FromLong(r->ops->misc(r, BBS_STEPSZ)));
1259 }
1260
1261 static const PyMethodDef bbs_pymethods[] = {
1262 #define METHNAME(name) bbsmeth_##name
1263   NAMETH(step,          "R.step(): steps the generator (not useful)")
1264   METH  (bits,   "R.bits(N) -> W: returns N bits (<= 32) from the generator")
1265   NAMETH(wrap,          "R.wrap(): flushes unused bits in internal buffer")
1266 #undef METHNAME
1267   { 0 }
1268 };
1269
1270 static const PyGetSetDef bbs_pygetset[] = {
1271 #define GETSETNAME(op, name) bbs##op##_##name
1272   GET   (n,             "R.n -> Blum modulus")
1273   GETSET(x,             "R.x -> current seed value")
1274   GET   (stepsz,        "R.stepsz -> number of bits generated per step")
1275 #undef GETSETNAME
1276   { 0 }
1277 };
1278
1279 static const PyTypeObject bbs_pytype_skel = {
1280   PyObject_HEAD_INIT(0) 0,              /* Header */
1281   "BlumBlumShub",                       /* @tp_name@ */
1282   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1283   0,                                    /* @tp_itemsize@ */
1284
1285   grand_pydealloc,                      /* @tp_dealloc@ */
1286   0,                                    /* @tp_print@ */
1287   0,                                    /* @tp_getattr@ */
1288   0,                                    /* @tp_setattr@ */
1289   0,                                    /* @tp_compare@ */
1290   0,                                    /* @tp_repr@ */
1291   0,                                    /* @tp_as_number@ */
1292   0,                                    /* @tp_as_sequence@ */
1293   0,                                    /* @tp_as_mapping@ */
1294   0,                                    /* @tp_hash@ */
1295   0,                                    /* @tp_call@ */
1296   0,                                    /* @tp_str@ */
1297   0,                                    /* @tp_getattro@ */
1298   0,                                    /* @tp_setattro@ */
1299   0,                                    /* @tp_as_buffer@ */
1300   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1301     Py_TPFLAGS_BASETYPE,
1302
1303   /* @tp_doc@ */
1304   "BlumBlumShub(N, [x = 2]): Blum-Blum-Shub pseudorandom number generator.",
1305
1306   0,                                    /* @tp_traverse@ */
1307   0,                                    /* @tp_clear@ */
1308   0,                                    /* @tp_richcompare@ */
1309   0,                                    /* @tp_weaklistoffset@ */
1310   0,                                    /* @tp_iter@ */
1311   0,                                    /* @tp_iternext@ */
1312   PYMETHODS(bbs),                       /* @tp_methods@ */
1313   0,                                    /* @tp_members@ */
1314   PYGETSET(bbs),                        /* @tp_getset@ */
1315   0,                                    /* @tp_base@ */
1316   0,                                    /* @tp_dict@ */
1317   0,                                    /* @tp_descr_get@ */
1318   0,                                    /* @tp_descr_set@ */
1319   0,                                    /* @tp_dictoffset@ */
1320   0,                                    /* @tp_init@ */
1321   PyType_GenericAlloc,                  /* @tp_alloc@ */
1322   bbs_pynew,                            /* @tp_new@ */
1323   0,                                    /* @tp_free@ */
1324   0                                     /* @tp_is_gc@ */
1325 };
1326
1327 typedef struct bbspriv_pyobj {
1328   grand_pyobj gr;
1329   bbs_priv bp;
1330 } bbspriv_pyobj;
1331
1332 #define BBSPRIV_BP(o) (&((bbspriv_pyobj *)(o))->bp)
1333
1334 static PyObject *bbspriv_pynew(PyTypeObject *ty,
1335                                PyObject *arg, PyObject *kw)
1336 {
1337   mp *p = 0, *q = 0, *n = 0, *x = MP_TWO;
1338   bbspriv_pyobj *rc = 0;
1339   static const char *const kwlist[] = { "n", "p", "q", "seed", 0 };
1340
1341   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&O&O&:new", KWLIST,
1342                                    convmp, &n, convmp, &p, convmp, &q,
1343                                    convmp, &x))
1344     goto end;
1345   if (!n + !p + !q > 1) VALERR("must specify at least two of n, p, q");
1346   if (!n) n = mp_mul(MP_NEW, p, q);
1347   else if (!p) mp_div(&p, 0, n, q);
1348   else if (!q) mp_div(&q, 0, n, p);
1349   rc = (bbspriv_pyobj *)ty->tp_alloc(ty, 0);
1350   rc->gr.r = bbs_rand(n, x);
1351   rc->gr.f = f_freeme;
1352   rc->bp.p = MP_COPY(p);
1353   rc->bp.q = MP_COPY(q);
1354   rc->bp.n = MP_COPY(n);
1355 end:
1356   mp_drop(p); mp_drop(q); mp_drop(n); mp_drop(x);
1357   return ((PyObject *)rc);
1358 }
1359
1360 static PyObject *bpmeth_generate(PyObject *me, PyObject *arg, PyObject *kw)
1361 {
1362   bbs_priv bp = { 0 };
1363   mp *x = MP_TWO;
1364   struct excinfo exc = EXCINFO_INIT;
1365   pypgev evt = { { 0 } };
1366   unsigned nbits, n = 0;
1367   grand *r = &rand_global;
1368   static const char *const kwlist[] =
1369     { "nbits", "event", "rng", "nsteps", "seed", 0 };
1370   bbspriv_pyobj *rc = 0;
1371
1372   evt.exc = &exc;
1373   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&O&O&O&:generate", KWLIST,
1374                                    convuint, &nbits, convpgev, &evt,
1375                                    convgrand, &r, convuint, &n, convmp, &x))
1376     goto end;
1377   if (bbs_gen(&bp, nbits, r, n, evt.ev.proc, evt.ev.ctx))
1378     PGENERR(&exc);
1379   rc = PyObject_New(bbspriv_pyobj, bbspriv_pytype);
1380   rc->gr.r = bbs_rand(bp.n, x);
1381   rc->gr.f = f_freeme;
1382   rc->bp.p = MP_COPY(bp.p);
1383   rc->bp.q = MP_COPY(bp.q);
1384   rc->bp.n = MP_COPY(bp.n);
1385 end:
1386   mp_drop(bp.p); mp_drop(bp.q); mp_drop(bp.n); mp_drop(x);
1387   return ((PyObject *)rc);
1388 }
1389
1390 static void bbspriv_pydealloc(PyObject *me)
1391 {
1392   bbs_priv *bp = BBSPRIV_BP(me);
1393   mp_drop(bp->n);
1394   mp_drop(bp->p);
1395   mp_drop(bp->q);
1396   grand_pydealloc(me);
1397 }
1398
1399 static PyObject *bpmeth_ff(PyObject *me, PyObject *arg)
1400 {
1401   mp *n = 0; grand *r = GRAND_R(me); bbs_priv *bp = BBSPRIV_BP(me);
1402   if (!PyArg_ParseTuple(arg, "O&:ff", convmp, &n)) return (0);
1403   r->ops->misc(r, BBS_FF, bp, n); RETURN_ME;
1404 }
1405
1406 static PyObject *bpmeth_rew(PyObject *me, PyObject *arg)
1407 {
1408   mp *n = 0; grand *r = GRAND_R(me); bbs_priv *bp = BBSPRIV_BP(me);
1409   if (!PyArg_ParseTuple(arg, "O&:rew", convmp, &n)) return (0);
1410   r->ops->misc(r, BBS_REW, bp, n); RETURN_ME;
1411 }
1412
1413 static PyObject *bpget_n(PyObject *me, void *hunoz)
1414   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->n))); }
1415
1416 static PyObject *bpget_p(PyObject *me, void *hunoz)
1417   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->p))); }
1418
1419 static PyObject *bpget_q(PyObject *me, void *hunoz)
1420   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->q))); }
1421
1422 static const PyMethodDef bbspriv_pymethods[] = {
1423 #define METHNAME(name) bpmeth_##name
1424   METH  (ff,            "R.ff(N): fast-forward N places")
1425   METH  (rew,           "R.rew(N): rewind N places")
1426   KWSMTH(generate,      "generate(NBITS, [event = pgen_nullev], "
1427                               "[rng = rand], [nsteps = 0], [seed = 2]) -> R")
1428 #undef METHNAME
1429   { 0 }
1430 };
1431
1432 static const PyGetSetDef bbspriv_pygetset[] = {
1433 #define GETSETNAME(op, name) bp##op##_##name
1434   GET   (n,             "R.n -> Blum modulus")
1435   GET   (p,             "R.p -> one of the factors of the modulus")
1436   GET   (q,             "R.q -> one of the factors of the modulus")
1437 #undef GETSETNAME
1438   { 0 }
1439 };
1440
1441 static const PyTypeObject bbspriv_pytype_skel = {
1442   PyObject_HEAD_INIT(0) 0,              /* Header */
1443   "BBSPriv",                            /* @tp_name@ */
1444   sizeof(bbspriv_pyobj),                /* @tp_basicsize@ */
1445   0,                                    /* @tp_itemsize@ */
1446
1447   bbspriv_pydealloc,                    /* @tp_dealloc@ */
1448   0,                                    /* @tp_print@ */
1449   0,                                    /* @tp_getattr@ */
1450   0,                                    /* @tp_setattr@ */
1451   0,                                    /* @tp_compare@ */
1452   0,                                    /* @tp_repr@ */
1453   0,                                    /* @tp_as_number@ */
1454   0,                                    /* @tp_as_sequence@ */
1455   0,                                    /* @tp_as_mapping@ */
1456   0,                                    /* @tp_hash@ */
1457   0,                                    /* @tp_call@ */
1458   0,                                    /* @tp_str@ */
1459   0,                                    /* @tp_getattro@ */
1460   0,                                    /* @tp_setattro@ */
1461   0,                                    /* @tp_as_buffer@ */
1462   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1463     Py_TPFLAGS_BASETYPE,
1464
1465   /* @tp_doc@ */
1466   "BBSPriv(..., [seed = 2]): Blum-Blum-Shub, with private key.\n"
1467   "  Keywords: n, p, q; must provide at least two",
1468
1469   0,                                    /* @tp_traverse@ */
1470   0,                                    /* @tp_clear@ */
1471   0,                                    /* @tp_richcompare@ */
1472   0,                                    /* @tp_weaklistoffset@ */
1473   0,                                    /* @tp_iter@ */
1474   0,                                    /* @tp_iternext@ */
1475   PYMETHODS(bbspriv),                   /* @tp_methods@ */
1476   0,                                    /* @tp_members@ */
1477   PYGETSET(bbspriv),                    /* @tp_getset@ */
1478   0,                                    /* @tp_base@ */
1479   0,                                    /* @tp_dict@ */
1480   0,                                    /* @tp_descr_get@ */
1481   0,                                    /* @tp_descr_set@ */
1482   0,                                    /* @tp_dictoffset@ */
1483   0,                                    /* @tp_init@ */
1484   PyType_GenericAlloc,                  /* @tp_alloc@ */
1485   bbspriv_pynew,                        /* @tp_new@ */
1486   0,                                    /* @tp_free@ */
1487   0                                     /* @tp_is_gc@ */
1488 };
1489
1490 /*----- Global stuff ------------------------------------------------------*/
1491
1492 void rand_pyinit(void)
1493 {
1494   INITTYPE(grand, root);
1495   INITTYPE(truerand, grand);
1496   INITTYPE(fibrand, grand);
1497   INITTYPE(lcrand, grand);
1498   INITTYPE(dsarand, grand);
1499   INITTYPE(bbs, grand);
1500   INITTYPE(bbspriv, bbs);
1501   INITTYPE(sslprf, grand);
1502   INITTYPE(tlsdx, grand);
1503   INITTYPE(tlsprf, grand);
1504   INITTYPE(gccrand, type);
1505   INITTYPE(gcrand, grand);
1506   INITTYPE(gclatinrand, gcrand);
1507   rand_noisesrc(RAND_GLOBAL, &noise_source);
1508   rand_seed(RAND_GLOBAL, 160);
1509 }
1510
1511 #define gccrand gccrand_info
1512 GEN(gccrands, crand)
1513
1514 void rand_pyinsert(PyObject *mod)
1515 {
1516   INSERT("GRand", grand_pytype);
1517   INSERT("TrueRand", truerand_pytype);
1518   INSERT("LCRand", lcrand_pytype);
1519   INSERT("FibRand", fibrand_pytype);
1520   INSERT("SSLRand", sslprf_pytype);
1521   INSERT("TLSDataExpansion", tlsdx_pytype);
1522   INSERT("TLSPRF", tlsprf_pytype);
1523   INSERT("DSARand", dsarand_pytype);
1524   INSERT("BlumBlumShub", bbs_pytype);
1525   INSERT("BBSPriv", bbspriv_pytype);
1526   INSERT("GCCRand", gccrand_pytype);
1527   INSERT("GCRand", gcrand_pytype);
1528   INSERT("GCLatinRand", gclatinrand_pytype);
1529   rand_pyobj = grand_pywrap(&rand_global, 0); Py_INCREF(rand_pyobj);
1530   gccrands_dict = gccrands(); Py_INCREF(gccrands_dict);
1531   INSERT("gccrands", gccrands_dict);
1532   INSERT("rand", rand_pyobj);
1533 }
1534
1535 /*----- That's all, folks -------------------------------------------------*/