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 = PyMapping_GetItemString
  69                    (gccrands_dict, (/*unconst*/ char *)r->ops->name)) != 0)
  70     ty = (PyTypeObject *)ob;
  71   return (grand_dopywrap(ty, r, f));
  72 }
  73
  74 CONVFUNC(grand, grand *, GRAND_R)
  75
  76 static int grand_check(PyObject *me)
  77 {
  78   if (!GRAND_R(me)) VALERR("random generator object is no longer valid");
  79   return (0);
  80 end:
  81   return (-1);
  82 }
  83
  84 static PyObject *grmeth_byte(PyObject *me)
  85 {
  86   if (grand_check(me)) return (0);
  87   return (PyInt_FromLong(grand_byte(GRAND_R(me))));
  88 }
  89
  90 static PyObject *grmeth_word(PyObject *me)
  91 {
  92   if (grand_check(me)) return (0);
  93   return (getulong(grand_word(GRAND_R(me))));
  94 }
  95
  96 static PyObject *grmeth_range(PyObject *me, PyObject *arg)
  97 {
  98   PyObject *m;
  99   mp *x = 0;
 100   mp *y = 0;
 101
 102   if (!PyArg_ParseTuple(arg, "O:range", &m)) return (0);
 103   if (grand_check(me)) return (0);
 104   if (PyInt_Check(m)) {
 105     long mm = PyInt_AS_LONG(m);
 106     if (mm <= 0) goto notpos;
 107     else if (mm <= 0xffffffff)
 108       return (PyInt_FromLong(grand_range(GRAND_R(me), mm)));
 109   }
 110   if ((x = getmp(m)) == 0) goto end;
 111   if (!MP_POSP(x)) goto notpos;
 112   y = mprand_range(MP_NEW, x, GRAND_R(me), 0);
 113   MP_DROP(x);
 114   return (mp_pywrap(y));
 115 notpos:
 116   VALERR("range must be strictly positive");
 117 end:
 118   if (x) MP_DROP(x);
 119   return (0);
 120 }
 121
 122 static PyObject *grmeth_mp(PyObject *me, PyObject *arg, PyObject *kw)
 123 {
 124   size_t l;
 125   mpw o = 0;
 126   static const char *const kwlist[] = { "bits", "or", 0 };
 127
 128   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:mp", KWLIST,
 129                                    convszt, &l, convmpw, &o))
 130     goto end;
 131   if (grand_check(me)) return (0);
 132   if (l < MPW_BITS && (o >> l)) VALERR("or mask too large");
 133   return (mp_pywrap(mprand(MP_NEW, l, GRAND_R(me), o)));
 134 end:
 135   return (0);
 136 }
 137
 138 static PyObject *grmeth_block(PyObject *me, PyObject *arg)
 139 {
 140   unsigned long n;
 141   PyObject *rc = 0;
 142
 143   if (!PyArg_ParseTuple(arg, "O&:block", convulong, &n)) goto end;
 144   if (grand_check(me)) return (0);
 145   rc = bytestring_pywrap(0, n);
 146   grand_fill(GRAND_R(me), BIN_PTR(rc), n);
 147 end:
 148   return (rc);
 149 }
 150
 151 static int checkop(grand *r, unsigned op, const char *what)
 152 {
 153   if (r->ops->misc(r, GRAND_CHECK, op)) return (0);
 154   PyErr_Format(PyExc_TypeError, "operation %s not supported", what);
 155   return (-1);
 156 }
 157
 158 static PyObject *grmeth_seedint(PyObject *me, PyObject *arg)
 159 {
 160   int i;
 161   grand *r = GRAND_R(me);
 162   if (!PyArg_ParseTuple(arg, "i:seedint", &i) ||
 163       grand_check(me) || checkop(r, GRAND_SEEDINT, "seedint"))
 164     goto end;
 165   r->ops->misc(r, GRAND_SEEDINT, i);
 166   RETURN_ME;
 167 end:
 168   return (0);
 169 }
 170
 171 static PyObject *grmeth_seedword(PyObject *me, PyObject *arg)
 172 {
 173   uint32 u;
 174   grand *r = GRAND_R(me);
 175   if (!PyArg_ParseTuple(arg, "O&:seedword", convu32, &u) ||
 176       grand_check(me) || checkop(r, GRAND_SEEDUINT32, "seedword"))
 177     goto end;
 178   r->ops->misc(r, GRAND_SEEDUINT32, u);
 179   RETURN_ME;
 180 end:
 181   return (0);
 182 }
 183
 184 static PyObject *grmeth_seedblock(PyObject *me, PyObject *arg)
 185 {
 186   struct bin in;
 187   grand *r = GRAND_R(me);
 188   if (!PyArg_ParseTuple(arg, "O&:seedblock", convbin, &in) ||
 189       grand_check(me) || checkop(r, GRAND_SEEDBLOCK, "seedblock"))
 190     goto end;
 191   r->ops->misc(r, GRAND_SEEDBLOCK, in.p, (size_t)in.sz);
 192   RETURN_ME;
 193 end:
 194   return (0);
 195 }
 196
 197 static PyObject *grmeth_seedmp(PyObject *me, PyObject *arg)
 198 {
 199   PyObject *x;
 200   mp *xx;
 201   grand *r = GRAND_R(me);
 202   if (!PyArg_ParseTuple(arg, "O:seedmp", &x) ||
 203       grand_check(me) || checkop(r, GRAND_SEEDMP, "seedmp") ||
 204       (xx = getmp(x)) == 0)
 205     goto end;
 206   r->ops->misc(r, GRAND_SEEDMP, xx);
 207   MP_DROP(xx);
 208   RETURN_ME;
 209 end:
 210   return (0);
 211 }
 212
 213 static PyObject *grmeth_seedrand(PyObject *me, PyObject *arg, PyObject *kw)
 214 {
 215   static const char *const kwlist[] = { "rng", 0 };
 216   grand *r = GRAND_R(me);
 217   grand *rr = &rand_global;
 218   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:seedrand", KWLIST,
 219                                    convgrand, &rr) ||
 220       grand_check(me) || checkop(r, GRAND_SEEDRAND, "seedrand"))
 221     goto end;
 222   r->ops->misc(r, GRAND_SEEDRAND, rr);
 223   RETURN_ME;
 224 end:
 225   return (0);
 226 }
 227
 228 static PyObject *grmeth_mask(PyObject *me, PyObject *arg)
 229 {
 230   grand *r = GRAND_R(me);
 231   struct bin in;
 232   const octet *p; size_t n;
 233   octet *q;
 234   PyObject *rc;
 235
 236   if (!PyArg_ParseTuple(arg, "O&:mask", convbin, &in)) return (0);
 237   if (grand_check(me)) return (0);
 238   rc = bytestring_pywrap(0, in.sz);
 239   q = (octet *)BIN_PTR(rc);
 240   GR_FILL(r, q, in.sz);
 241   p = in.p; n = in.sz; while (n--) *q++ ^= *p++;
 242   return (rc);
 243 }
 244
 245 static void grand_pydealloc(PyObject *me)
 246 {
 247   grand_pyobj *g = (grand_pyobj *)me;
 248   if ((g->f & f_freeme) && g->r) GR_DESTROY(g->r);
 249   FREEOBJ(me);
 250 }
 251
 252 static PyObject *grget_name(PyObject *me, void *hunoz)
 253   { return (grand_check(me) ? 0 : TEXT_FROMSTR(GRAND_R(me)->ops->name)); }
 254
 255 static PyObject *grget_cryptop(PyObject *me, void *hunoz)
 256   { return (grand_check(me) ? 0 : getbool(GRAND_R(me)->ops->f & GRAND_CRYPTO)); }
 257
 258 static const PyGetSetDef grand_pygetset[] = {
 259 #define GETSETNAME(op, name) gr##op##_##name
 260   GET   (name,          "R.name -> name of this kind of generator")
 261   GET   (cryptop,       "R.cryptop -> flag: cryptographically strong?")
 262 #undef GETSETNAME
 263   { 0 }
 264 };
 265
 266 static const PyMethodDef grand_pymethods[] = {
 267 #define METHNAME(name) grmeth_##name
 268   NAMETH(byte,          "R.byte() -> BYTE")
 269   NAMETH(word,          "R.word() -> WORD")
 270   METH  (block,         "R.block(N) -> STRING")
 271   KWMETH(mp,            "R.mp(bits, [or = 0]) -> MP")
 272   METH  (range,         "R.range(MAX) -> INT")
 273   METH  (mask,          "R.mask(STR) -> STR")
 274   METH  (seedint,       "R.seedint(I)")
 275   METH  (seedword,      "R.seedword(I)")
 276   METH  (seedblock,     "R.seedblock(BYTES)")
 277   METH  (seedmp,        "R.seedmp(X)")
 278   KWMETH(seedrand,      "R.seedrand(RR)")
 279 #undef METHNAME
 280   { 0 }
 281 };
 282
 283 static const PyTypeObject grand_pytype_skel = {
 284   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 285   "GRand",                              /* @tp_name@ */
 286   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 287   0,                                    /* @tp_itemsize@ */
 288
 289   grand_pydealloc,                      /* @tp_dealloc@ */
 290   0,                                    /* @tp_print@ */
 291   0,                                    /* @tp_getattr@ */
 292   0,                                    /* @tp_setattr@ */
 293   0,                                    /* @tp_compare@ */
 294   0,                                    /* @tp_repr@ */
 295   0,                                    /* @tp_as_number@ */
 296   0,                                    /* @tp_as_sequence@ */
 297   0,                                    /* @tp_as_mapping@ */
 298   0,                                    /* @tp_hash@ */
 299   0,                                    /* @tp_call@ */
 300   0,                                    /* @tp_str@ */
 301   0,                                    /* @tp_getattro@ */
 302   0,                                    /* @tp_setattro@ */
 303   0,                                    /* @tp_as_buffer@ */
 304   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 305     Py_TPFLAGS_BASETYPE,
 306
 307   /* @tp_doc@ */
 308   "Generic random number source.",
 309
 310   0,                                    /* @tp_traverse@ */
 311   0,                                    /* @tp_clear@ */
 312   0,                                    /* @tp_richcompare@ */
 313   0,                                    /* @tp_weaklistoffset@ */
 314   0,                                    /* @tp_iter@ */
 315   0,                                    /* @tp_iternext@ */
 316   PYMETHODS(grand),                     /* @tp_methods@ */
 317   0,                                    /* @tp_members@ */
 318   PYGETSET(grand),                      /* @tp_getset@ */
 319   0,                                    /* @tp_base@ */
 320   0,                                    /* @tp_dict@ */
 321   0,                                    /* @tp_descr_get@ */
 322   0,                                    /* @tp_descr_set@ */
 323   0,                                    /* @tp_dictoffset@ */
 324   0,                                    /* @tp_init@ */
 325   PyType_GenericAlloc,                  /* @tp_alloc@ */
 326   abstract_pynew,                       /* @tp_new@ */
 327   0,                                    /* @tp_free@ */
 328   0                                     /* @tp_is_gc@ */
 329 };
 330
 331 static PyObject *lcrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 332 {
 333   uint32 n = 0;
 334   static const char *const kwlist[] = { "seed", 0 };
 335   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convu32, &n))
 336     return (0);
 337   return (grand_dopywrap(lcrand_pytype, lcrand_create(n), f_freeme));
 338 }
 339
 340 static const PyTypeObject lcrand_pytype_skel = {
 341   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 342   "LCRand",                             /* @tp_name@ */
 343   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 344   0,                                    /* @tp_itemsize@ */
 345
 346   grand_pydealloc,                      /* @tp_dealloc@ */
 347   0,                                    /* @tp_print@ */
 348   0,                                    /* @tp_getattr@ */
 349   0,                                    /* @tp_setattr@ */
 350   0,                                    /* @tp_compare@ */
 351   0,                                    /* @tp_repr@ */
 352   0,                                    /* @tp_as_number@ */
 353   0,                                    /* @tp_as_sequence@ */
 354   0,                                    /* @tp_as_mapping@ */
 355   0,                                    /* @tp_hash@ */
 356   0,                                    /* @tp_call@ */
 357   0,                                    /* @tp_str@ */
 358   0,                                    /* @tp_getattro@ */
 359   0,                                    /* @tp_setattro@ */
 360   0,                                    /* @tp_as_buffer@ */
 361   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 362     Py_TPFLAGS_BASETYPE,
 363
 364   /* @tp_doc@ */
 365   "LCRand([seed = 0]): linear congruential generator.",
 366
 367   0,                                    /* @tp_traverse@ */
 368   0,                                    /* @tp_clear@ */
 369   0,                                    /* @tp_richcompare@ */
 370   0,                                    /* @tp_weaklistoffset@ */
 371   0,                                    /* @tp_iter@ */
 372   0,                                    /* @tp_iternext@ */
 373   0,                                    /* @tp_methods@ */
 374   0,                                    /* @tp_members@ */
 375   0,                                    /* @tp_getset@ */
 376   0,                                    /* @tp_base@ */
 377   0,                                    /* @tp_dict@ */
 378   0,                                    /* @tp_descr_get@ */
 379   0,                                    /* @tp_descr_set@ */
 380   0,                                    /* @tp_dictoffset@ */
 381   0,                                    /* @tp_init@ */
 382   PyType_GenericAlloc,                  /* @tp_alloc@ */
 383   lcrand_pynew,                         /* @tp_new@ */
 384   0,                                    /* @tp_free@ */
 385   0                                     /* @tp_is_gc@ */
 386 };
 387
 388 static PyObject *fibrand_pynew(PyTypeObject *me, PyObject *arg, PyObject *kw)
 389 {
 390   uint32 n = 0;
 391   static const char *const kwlist[] = { "seed", 0 };
 392   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convu32, &n))
 393     return (0);
 394   return (grand_dopywrap(fibrand_pytype, fibrand_create(n), f_freeme));
 395 }
 396
 397 static const PyTypeObject fibrand_pytype_skel = {
 398   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 399   "FibRand",                            /* @tp_name@ */
 400   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 401   0,                                    /* @tp_itemsize@ */
 402
 403   grand_pydealloc,                      /* @tp_dealloc@ */
 404   0,                                    /* @tp_print@ */
 405   0,                                    /* @tp_getattr@ */
 406   0,                                    /* @tp_setattr@ */
 407   0,                                    /* @tp_compare@ */
 408   0,                                    /* @tp_repr@ */
 409   0,                                    /* @tp_as_number@ */
 410   0,                                    /* @tp_as_sequence@ */
 411   0,                                    /* @tp_as_mapping@ */
 412   0,                                    /* @tp_hash@ */
 413   0,                                    /* @tp_call@ */
 414   0,                                    /* @tp_str@ */
 415   0,                                    /* @tp_getattro@ */
 416   0,                                    /* @tp_setattro@ */
 417   0,                                    /* @tp_as_buffer@ */
 418   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 419     Py_TPFLAGS_BASETYPE,
 420
 421   /* @tp_doc@ */
 422   "FibRand([seed = 0]): Fibonacci generator.",
 423
 424   0,                                    /* @tp_traverse@ */
 425   0,                                    /* @tp_clear@ */
 426   0,                                    /* @tp_richcompare@ */
 427   0,                                    /* @tp_weaklistoffset@ */
 428   0,                                    /* @tp_iter@ */
 429   0,                                    /* @tp_iternext@ */
 430   0,                                    /* @tp_methods@ */
 431   0,                                    /* @tp_members@ */
 432   0,                                    /* @tp_getset@ */
 433   0,                                    /* @tp_base@ */
 434   0,                                    /* @tp_dict@ */
 435   0,                                    /* @tp_descr_get@ */
 436   0,                                    /* @tp_descr_set@ */
 437   0,                                    /* @tp_dictoffset@ */
 438   0,                                    /* @tp_init@ */
 439   PyType_GenericAlloc,                  /* @tp_alloc@ */
 440   fibrand_pynew,                        /* @tp_new@ */
 441   0,                                    /* @tp_free@ */
 442   0                                     /* @tp_is_gc@ */
 443 };
 444
 445 /*----- True random generator ---------------------------------------------*/
 446
 447 static PyObject *trmeth_gate(PyObject *me)
 448   { grand *r = GRAND_R(me); r->ops->misc(GRAND_R(me), RAND_GATE); RETURN_ME; }
 449
 450 static PyObject *trmeth_stretch(PyObject *me)
 451   { grand *r = GRAND_R(me); r->ops->misc(r, RAND_STRETCH); RETURN_ME; }
 452
 453 static PyObject *trmeth_add(PyObject *me, PyObject *arg)
 454 {
 455   grand *r = GRAND_R(me);
 456   struct bin in; unsigned goodbits;
 457   if (!PyArg_ParseTuple(arg, "O&O&:add", convbin, &in, convuint, &goodbits))
 458     return (0);
 459   r->ops->misc(r, RAND_ADD, in.p, (size_t)in.sz, goodbits);
 460   RETURN_ME;
 461 }
 462
 463 static PyObject *trmeth_key(PyObject *me, PyObject *arg)
 464 {
 465   grand *r = GRAND_R(me);
 466   struct bin k;
 467   if (!PyArg_ParseTuple(arg, "O&:key", convbin, &k)) return (0);
 468   r->ops->misc(r, RAND_KEY, k.p, (size_t)k.sz);
 469   RETURN_ME;
 470 }
 471
 472 static PyObject *trmeth_seed(PyObject *me, PyObject *arg)
 473 {
 474   grand *r = GRAND_R(me);
 475   unsigned u;
 476   if (!PyArg_ParseTuple(arg, "O&:seed", convuint, &u)) return (0);
 477   if (u > RAND_IBITS) VALERR("pointlessly large");
 478   r->ops->misc(r, RAND_SEED, u);
 479   RETURN_ME;
 480 end:
 481   return (0);
 482 }
 483
 484 static PyObject *trmeth_timer(PyObject *me)
 485   { grand *r = GRAND_R(me); r->ops->misc(r, RAND_TIMER); RETURN_ME; }
 486
 487 static PyObject *truerand_pynew(PyTypeObject *ty,
 488                                 PyObject *arg, PyObject *kw)
 489 {
 490   static const char *const kwlist[] = { 0 };
 491   grand *r;
 492   PyObject *rc = 0;
 493   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) goto end;
 494   r = rand_create();
 495   r->ops->misc(r, RAND_NOISESRC, &noise_source);
 496   r->ops->misc(r, RAND_SEED, 160);
 497   rc = grand_dopywrap(ty, r, f_freeme);
 498 end:
 499   return (rc);
 500 }
 501
 502 static const PyMethodDef truerand_pymethods[] = {
 503 #define METHNAME(name) trmeth_##name
 504   NAMETH(gate,          "R.gate()")
 505   NAMETH(stretch,       "R.stretch()")
 506   METH  (key,           "R.key(BYTES)")
 507   METH  (seed,          "R.seed(NBITS)")
 508   METH  (add,           "R.add(BYTES, GOODBITS")
 509   NAMETH(timer,         "R.timer()")
 510 #undef METHNAME
 511   { 0 }
 512 };
 513
 514 static PyObject *trget_goodbits(PyObject *me, void *hunoz)
 515 {
 516   grand *r = GRAND_R(me);
 517   return (PyInt_FromLong(r->ops->misc(r, RAND_GOODBITS)));
 518 }
 519
 520 static const PyGetSetDef truerand_pygetset[] = {
 521 #define GETSETNAME(op, name) tr##op##_##name
 522   GET   (goodbits,      "R.goodbits -> good bits of entropy remaining")
 523 #undef GETSETNAME
 524   { 0 }
 525 };
 526
 527 static const PyTypeObject truerand_pytype_skel = {
 528   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 529   "TrueRand",                           /* @tp_name@ */
 530   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 531   0,                                    /* @tp_itemsize@ */
 532
 533   grand_pydealloc,                      /* @tp_dealloc@ */
 534   0,                                    /* @tp_print@ */
 535   0,                                    /* @tp_getattr@ */
 536   0,                                    /* @tp_setattr@ */
 537   0,                                    /* @tp_compare@ */
 538   0,                                    /* @tp_repr@ */
 539   0,                                    /* @tp_as_number@ */
 540   0,                                    /* @tp_as_sequence@ */
 541   0,                                    /* @tp_as_mapping@ */
 542   0,                                    /* @tp_hash@ */
 543   0,                                    /* @tp_call@ */
 544   0,                                    /* @tp_str@ */
 545   0,                                    /* @tp_getattro@ */
 546   0,                                    /* @tp_setattro@ */
 547   0,                                    /* @tp_as_buffer@ */
 548   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 549     Py_TPFLAGS_BASETYPE,
 550
 551   /* @tp_doc@ */
 552   "TrueRand(): true random number source.",
 553
 554   0,                                    /* @tp_traverse@ */
 555   0,                                    /* @tp_clear@ */
 556   0,                                    /* @tp_richcompare@ */
 557   0,                                    /* @tp_weaklistoffset@ */
 558   0,                                    /* @tp_iter@ */
 559   0,                                    /* @tp_iternext@ */
 560   PYMETHODS(truerand),                  /* @tp_methods@ */
 561   0,                                    /* @tp_members@ */
 562   PYGETSET(truerand),                   /* @tp_getset@ */
 563   0,                                    /* @tp_base@ */
 564   0,                                    /* @tp_dict@ */
 565   0,                                    /* @tp_descr_get@ */
 566   0,                                    /* @tp_descr_set@ */
 567   0,                                    /* @tp_dictoffset@ */
 568   0,                                    /* @tp_init@ */
 569   PyType_GenericAlloc,                  /* @tp_alloc@ */
 570   truerand_pynew,                       /* @tp_new@ */
 571   0,                                    /* @tp_free@ */
 572   0                                     /* @tp_is_gc@ */
 573 };
 574
 575 /*----- Generators from symmetric encryption algorithms -------------------*/
 576
 577 static PyTypeObject *gccrand_pytype, *gcrand_pytype, *gclatinrand_pytype;
 578
 579 typedef grand *gcrand_func(const void *, size_t sz);
 580 typedef grand *gcirand_func(const void *, size_t sz, uint32);
 581 typedef grand *gcnrand_func(const void *, size_t sz, const void *);
 582 typedef grand *gcshakerand_func(const void *, size_t,
 583                                 const void *, size_t,
 584                                 const void *, size_t);
 585 typedef grand *gcshafuncrand_func(const void *, size_t,
 586                                   const void *, size_t);
 587 typedef grand *gckmacrand_func(const void *, size_t, const void *, size_t);
 588 typedef struct gccrand_info {
 589   const char *name;
 590   const octet *keysz;
 591   unsigned f;
 592   size_t noncesz;
 593   gcrand_func *func;
 594 } gccrand_info;
 595
 596 #define RNGF_MASK 255u
 597
 598 enum {
 599   RNG_PLAIN = 0,
 600   RNG_SEAL,
 601   RNG_LATIN,
 602   RNG_SHAKE,
 603   RNG_KMAC
 604 };
 605
 606 typedef struct gccrand_pyobj {
 607   PyHeapTypeObject ty;
 608   const gccrand_info *info;
 609 } gccrand_pyobj;
 610 #define GCCRAND_INFO(o) (((gccrand_pyobj *)(o))->info)
 611
 612 #define GCCRAND_DEF(name, ksz, func, f, nsz)                            \
 613   static const gccrand_info func##_info =                               \
 614     { name, ksz, f, nsz, (gcrand_func *)func };
 615 RNGS(GCCRAND_DEF)
 616
 617 static const gccrand_info *const gcrandtab[] = {
 618 #define GCCRAND_ENTRY(name, ksz, func, f, nsz) &func##_info,
 619   RNGS(GCCRAND_ENTRY)
 620   0
 621 };
 622
 623 static PyObject *gcrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 624 {
 625   const gccrand_info *info = GCCRAND_INFO(ty);
 626   static const char *const kwlist[] = { "key", 0 };
 627   struct bin k;
 628
 629   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST,  convbin, &k))
 630     goto end;
 631   if (keysz(k.sz, info->keysz) != k.sz) VALERR("bad key length");
 632   return (grand_dopywrap(ty, info->func(k.p, k.sz), f_freeme));
 633 end:
 634   return (0);
 635 }
 636
 637 static PyObject *gcirand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 638 {
 639   const gccrand_info *info = GCCRAND_INFO(ty);
 640   uint32 i = 0;
 641   static const char *const kwlist[] = { "key", "i", 0 };
 642   struct bin k;
 643
 644   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:new", KWLIST,
 645                                    convbin, &k, convu32, &i))
 646     goto end;
 647   if (keysz(k.sz, info->keysz) != k.sz) VALERR("bad key length");
 648   return (grand_dopywrap(ty,
 649                          ((gcirand_func *)info->func)(k.p, k.sz, i),
 650                          f_freeme));
 651 end:
 652   return (0);
 653 }
 654
 655 static PyObject *gcnrand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 656 {
 657   const gccrand_info *info = GCCRAND_INFO(ty);
 658   static const char *const kwlist[] = { "key", "nonce", 0 };
 659   struct bin k, n;
 660
 661   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:new", KWLIST,
 662                                    convbin, &k, convbin, &n))
 663     goto end;
 664   if (keysz(k.sz, info->keysz) != k.sz) VALERR("bad key length");
 665   if (n.sz != info->noncesz) VALERR("bad nonce length");
 666   return (grand_dopywrap(ty,
 667                          ((gcnrand_func *)info->func)(k.p, k.sz, n.p),
 668                          f_freeme));
 669 end:
 670   return (0);
 671 }
 672
 673 static PyObject *gcshakyrand_pynew(PyTypeObject *ty,
 674                                    PyObject *arg, PyObject *kw)
 675 {
 676   const gccrand_info *info = GCCRAND_INFO(ty);
 677   static const char
 678     *const kwlist_shake[] = { "key", "func", "perso", 0 },
 679     *const kwlist_func[] = { "key", "perso", 0 };
 680   struct bin k, f = { 0, 0 }, p = { 0, 0 };
 681
 682   if ((info->f&RNGF_MASK) == RNG_SHAKE
 683         ? !PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&O&:new",
 684                                        (/*unconst*/ char **)kwlist_shake,
 685                                        convbin, &k,
 686                                        convbin, &f, convbin, &p)
 687         : !PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:new",
 688                                        (/*unconst*/ char **)kwlist_func,
 689                                        convbin, &k, convbin, &p))
 690     goto end;
 691   if (keysz(k.sz, info->keysz) != k.sz) VALERR("bad key length");
 692   return (grand_dopywrap(ty,
 693                          (info->f&RNGF_MASK) == RNG_SHAKE
 694                            ? ((gcshakerand_func *)info->func)(f.p, f.sz,
 695                                                               p.p, p.sz,
 696                                                               k.p, k.sz)
 697                            : ((gcshafuncrand_func *)info->func)(p.p, p.sz,
 698                                                                 k.p, k.sz),
 699                          f_freeme));
 700 end:
 701   return (0);
 702 }
 703
 704 static PyObject *gccrand_pywrap(const gccrand_info *info)
 705 {
 706   gccrand_pyobj *g = newtype(gccrand_pytype, 0, info->name);
 707   g->info = info;
 708   g->ty.ht_type.tp_basicsize = sizeof(grand_pyobj);
 709   switch (info->f&RNGF_MASK) {
 710     case RNG_LATIN: g->ty.ht_type.tp_base = gclatinrand_pytype; break;
 711     default: g->ty.ht_type.tp_base = gcrand_pytype; break;
 712   }
 713   Py_INCREF(g->ty.ht_type.tp_base);
 714   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 715                             Py_TPFLAGS_BASETYPE |
 716                             Py_TPFLAGS_HEAPTYPE);
 717   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 718   g->ty.ht_type.tp_free = 0;
 719   switch (info->f&RNGF_MASK) {
 720     case RNG_LATIN: g->ty.ht_type.tp_new = gcnrand_pynew; break;
 721     case RNG_SEAL: g->ty.ht_type.tp_new = gcirand_pynew; break;
 722     case RNG_SHAKE: case RNG_KMAC:
 723       g->ty.ht_type.tp_new = gcshakyrand_pynew; break;
 724     default: g->ty.ht_type.tp_new = gcrand_pynew; break;
 725   }
 726   typeready(&g->ty.ht_type);
 727   return ((PyObject *)g);
 728 }
 729
 730 static PyObject *gccrget_name(PyObject *me, void *hunoz)
 731   { return (TEXT_FROMSTR(GCCRAND_INFO(me)->name)); }
 732 static PyObject *gccrget_keysz(PyObject *me, void *hunoz)
 733   { return (keysz_pywrap(GCCRAND_INFO(me)->keysz)); }
 734
 735 static PyObject *gclrmeth_tell(PyObject *me)
 736 {
 737   grand *r = GRAND_R(me);
 738   PyObject *rc = 0;
 739   kludge64 off;
 740
 741   r->ops->misc(r, SALSA20_TELLU64, &off);
 742   rc = getk64(off);
 743   return (rc);
 744 }
 745
 746 static PyObject *gclrmeth_seek(PyObject *me, PyObject *arg)
 747 {
 748   grand *r = GRAND_R(me);
 749   kludge64 off;
 750
 751   if (!PyArg_ParseTuple(arg, "O&:seek", convk64, &off)) return (0);
 752   r->ops->misc(r, SALSA20_SEEKU64, off);
 753   RETURN_ME;
 754 }
 755
 756 static const PyGetSetDef gccrand_pygetset[] = {
 757 #define GETSETNAME(op, name) gccr##op##_##name
 758   GET   (keysz,         "CR.keysz -> acceptable key sizes")
 759   GET   (name,          "CR.name -> name of this kind of generator")
 760 #undef GETSETNAME
 761   { 0 }
 762 };
 763
 764 static const PyMethodDef gclatinrand_pymethods[] = {
 765 #define METHNAME(name) gclrmeth_##name
 766   NAMETH(tell,          "R.tell() -> OFF")
 767   METH  (seek,          "R.seek(OFF)")
 768 #undef METHNAME
 769   { 0 }
 770 };
 771
 772 static const PyTypeObject gccrand_pytype_skel = {
 773   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 774   "GCCRand",                            /* @tp_name@ */
 775   sizeof(gccrand_pyobj),                /* @tp_basicsize@ */
 776   0,                                    /* @tp_itemsize@ */
 777
 778   0,                                    /* @tp_dealloc@ */
 779   0,                                    /* @tp_print@ */
 780   0,                                    /* @tp_getattr@ */
 781   0,                                    /* @tp_setattr@ */
 782   0,                                    /* @tp_compare@ */
 783   0,                                    /* @tp_repr@ */
 784   0,                                    /* @tp_as_number@ */
 785   0,                                    /* @tp_as_sequence@ */
 786   0,                                    /* @tp_as_mapping@ */
 787   0,                                    /* @tp_hash@ */
 788   0,                                    /* @tp_call@ */
 789   0,                                    /* @tp_str@ */
 790   0,                                    /* @tp_getattro@ */
 791   0,                                    /* @tp_setattro@ */
 792   0,                                    /* @tp_as_buffer@ */
 793   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 794     Py_TPFLAGS_BASETYPE,
 795
 796   /* @tp_doc@ */
 797   "Metaclass for symmetric crypto-based generators.",
 798
 799   0,                                    /* @tp_traverse@ */
 800   0,                                    /* @tp_clear@ */
 801   0,                                    /* @tp_richcompare@ */
 802   0,                                    /* @tp_weaklistoffset@ */
 803   0,                                    /* @tp_iter@ */
 804   0,                                    /* @tp_iternext@ */
 805   0,                                    /* @tp_methods@ */
 806   0,                                    /* @tp_members@ */
 807   PYGETSET(gccrand),                    /* @tp_getset@ */
 808   0,                                    /* @tp_base@ */
 809   0,                                    /* @tp_dict@ */
 810   0,                                    /* @tp_descr_get@ */
 811   0,                                    /* @tp_descr_set@ */
 812   0,                                    /* @tp_dictoffset@ */
 813   0,                                    /* @tp_init@ */
 814   PyType_GenericAlloc,                  /* @tp_alloc@ */
 815   abstract_pynew,                       /* @tp_new@ */
 816   0,                                    /* @tp_free@ */
 817   0                                     /* @tp_is_gc@ */
 818 };
 819
 820 static const PyTypeObject gcrand_pytype_skel = {
 821   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 822   "GCRand",                             /* @tp_name@ */
 823   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 824   0,                                    /* @tp_itemsize@ */
 825
 826   grand_pydealloc,                      /* @tp_dealloc@ */
 827   0,                                    /* @tp_print@ */
 828   0,                                    /* @tp_getattr@ */
 829   0,                                    /* @tp_setattr@ */
 830   0,                                    /* @tp_compare@ */
 831   0,                                    /* @tp_repr@ */
 832   0,                                    /* @tp_as_number@ */
 833   0,                                    /* @tp_as_sequence@ */
 834   0,                                    /* @tp_as_mapping@ */
 835   0,                                    /* @tp_hash@ */
 836   0,                                    /* @tp_call@ */
 837   0,                                    /* @tp_str@ */
 838   0,                                    /* @tp_getattro@ */
 839   0,                                    /* @tp_setattro@ */
 840   0,                                    /* @tp_as_buffer@ */
 841   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 842     Py_TPFLAGS_BASETYPE,
 843
 844   /* @tp_doc@ */
 845   "Abstract base class for symmetric crypto-based generators.",
 846
 847   0,                                    /* @tp_traverse@ */
 848   0,                                    /* @tp_clear@ */
 849   0,                                    /* @tp_richcompare@ */
 850   0,                                    /* @tp_weaklistoffset@ */
 851   0,                                    /* @tp_iter@ */
 852   0,                                    /* @tp_iternext@ */
 853   0,                                    /* @tp_methods@ */
 854   0,                                    /* @tp_members@ */
 855   0,                                    /* @tp_getset@ */
 856   0,                                    /* @tp_base@ */
 857   0,                                    /* @tp_dict@ */
 858   0,                                    /* @tp_descr_get@ */
 859   0,                                    /* @tp_descr_set@ */
 860   0,                                    /* @tp_dictoffset@ */
 861   0,                                    /* @tp_init@ */
 862   PyType_GenericAlloc,                  /* @tp_alloc@ */
 863   abstract_pynew,                       /* @tp_new@ */
 864   0,                                    /* @tp_free@ */
 865   0                                     /* @tp_is_gc@ */
 866 };
 867
 868 static const PyTypeObject gclatinrand_pytype_skel = {
 869   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 870   "GCLatinRand",                        /* @tp_name@ */
 871   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 872   0,                                    /* @tp_itemsize@ */
 873
 874   grand_pydealloc,                      /* @tp_dealloc@ */
 875   0,                                    /* @tp_print@ */
 876   0,                                    /* @tp_getattr@ */
 877   0,                                    /* @tp_setattr@ */
 878   0,                                    /* @tp_compare@ */
 879   0,                                    /* @tp_repr@ */
 880   0,                                    /* @tp_as_number@ */
 881   0,                                    /* @tp_as_sequence@ */
 882   0,                                    /* @tp_as_mapping@ */
 883   0,                                    /* @tp_hash@ */
 884   0,                                    /* @tp_call@ */
 885   0,                                    /* @tp_str@ */
 886   0,                                    /* @tp_getattro@ */
 887   0,                                    /* @tp_setattro@ */
 888   0,                                    /* @tp_as_buffer@ */
 889   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 890     Py_TPFLAGS_BASETYPE,
 891
 892   /* @tp_doc@ */
 893   "Abstract base class for symmetric crypto-based generators.",
 894
 895   0,                                    /* @tp_traverse@ */
 896   0,                                    /* @tp_clear@ */
 897   0,                                    /* @tp_richcompare@ */
 898   0,                                    /* @tp_weaklistoffset@ */
 899   0,                                    /* @tp_iter@ */
 900   0,                                    /* @tp_iternext@ */
 901   PYMETHODS(gclatinrand),               /* @tp_methods@ */
 902   0,                                    /* @tp_members@ */
 903   0,                                    /* @tp_getset@ */
 904   0,                                    /* @tp_base@ */
 905   0,                                    /* @tp_dict@ */
 906   0,                                    /* @tp_descr_get@ */
 907   0,                                    /* @tp_descr_set@ */
 908   0,                                    /* @tp_dictoffset@ */
 909   0,                                    /* @tp_init@ */
 910   PyType_GenericAlloc,                  /* @tp_alloc@ */
 911   abstract_pynew,                       /* @tp_new@ */
 912   0,                                    /* @tp_free@ */
 913   0                                     /* @tp_is_gc@ */
 914 };
 915
 916 /*----- SSL and TLS generators --------------------------------------------*/
 917
 918 static PyObject *sslprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 919 {
 920   struct bin k, s;
 921   const gchash *hco = &md5, *hci = &sha;
 922   PyObject *rc = 0;
 923   static const char *const kwlist[] = { "key", "seed", "ohash", "ihash", 0 };
 924
 925   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&:new", KWLIST,
 926                                    convbin, &k, convbin, &s,
 927                                    convgchash, &hco, convgchash, &hci))
 928     goto end;
 929   rc = grand_dopywrap(ty, sslprf_rand(hco, hci, k.p, k.sz, s.p, s.sz),
 930                       f_freeme);
 931 end:
 932   return (rc);
 933 }
 934
 935 static PyObject *tlsdx_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 936 {
 937   struct bin k, s;
 938   const gcmac *mc = &sha_hmac;
 939   PyObject *rc = 0;
 940   static const char *const kwlist[] = { "key", "seed", "mac", 0 };
 941
 942   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&:new", KWLIST,
 943                                    convbin, &k, convbin, &s,
 944                                    convgcmac, &mc))
 945     goto end;
 946   rc = grand_dopywrap(ty, tlsdx_rand(mc, k.p, k.sz, s.p, s.sz), f_freeme);
 947 end:
 948   return (rc);
 949 }
 950
 951 static PyObject *tlsprf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 952 {
 953   struct bin k, s;
 954   const gcmac *mcl = &md5_hmac, *mcr = &sha_hmac;
 955   PyObject *rc = 0;
 956   static const char *const kwlist[] = { "key", "seed", "lmac", "rmac", 0 };
 957
 958   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&:new", KWLIST,
 959                                    convbin, &k, convbin, &s,
 960                                    convgcmac, &mcl, convgcmac, &mcr))
 961     goto end;
 962   rc = grand_dopywrap(ty, tlsprf_rand(mcl, mcr, k.p, k.sz, s.p, s.sz),
 963                       f_freeme);
 964 end:
 965   return (rc);
 966 }
 967
 968 static const PyTypeObject sslprf_pytype_skel = {
 969   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 970   "SSLRand",                            /* @tp_name@ */
 971   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
 972   0,                                    /* @tp_itemsize@ */
 973
 974   grand_pydealloc,                      /* @tp_dealloc@ */
 975   0,                                    /* @tp_print@ */
 976   0,                                    /* @tp_getattr@ */
 977   0,                                    /* @tp_setattr@ */
 978   0,                                    /* @tp_compare@ */
 979   0,                                    /* @tp_repr@ */
 980   0,                                    /* @tp_as_number@ */
 981   0,                                    /* @tp_as_sequence@ */
 982   0,                                    /* @tp_as_mapping@ */
 983   0,                                    /* @tp_hash@ */
 984   0,                                    /* @tp_call@ */
 985   0,                                    /* @tp_str@ */
 986   0,                                    /* @tp_getattro@ */
 987   0,                                    /* @tp_setattro@ */
 988   0,                                    /* @tp_as_buffer@ */
 989   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 990     Py_TPFLAGS_BASETYPE,
 991
 992   /* @tp_doc@ */
 993   "SSLRand(KEY, SEED, [ohash = md5], [ihash = sha]):\n"
 994   "  RNG for SSL master secret.",
 995
 996   0,                                    /* @tp_traverse@ */
 997   0,                                    /* @tp_clear@ */
 998   0,                                    /* @tp_richcompare@ */
 999   0,                                    /* @tp_weaklistoffset@ */
1000   0,                                    /* @tp_iter@ */
1001   0,                                    /* @tp_iternext@ */
1002   0,                                    /* @tp_methods@ */
1003   0,                                    /* @tp_members@ */
1004   0,                                    /* @tp_getset@ */
1005   0,                                    /* @tp_base@ */
1006   0,                                    /* @tp_dict@ */
1007   0,                                    /* @tp_descr_get@ */
1008   0,                                    /* @tp_descr_set@ */
1009   0,                                    /* @tp_dictoffset@ */
1010   0,                                    /* @tp_init@ */
1011   PyType_GenericAlloc,                  /* @tp_alloc@ */
1012   sslprf_pynew,                         /* @tp_new@ */
1013   0,                                    /* @tp_free@ */
1014   0                                     /* @tp_is_gc@ */
1015 };
1016
1017 static const PyTypeObject tlsdx_pytype_skel = {
1018   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1019   "TLSDataExpansion",                   /* @tp_name@ */
1020   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1021   0,                                    /* @tp_itemsize@ */
1022
1023   grand_pydealloc,                      /* @tp_dealloc@ */
1024   0,                                    /* @tp_print@ */
1025   0,                                    /* @tp_getattr@ */
1026   0,                                    /* @tp_setattr@ */
1027   0,                                    /* @tp_compare@ */
1028   0,                                    /* @tp_repr@ */
1029   0,                                    /* @tp_as_number@ */
1030   0,                                    /* @tp_as_sequence@ */
1031   0,                                    /* @tp_as_mapping@ */
1032   0,                                    /* @tp_hash@ */
1033   0,                                    /* @tp_call@ */
1034   0,                                    /* @tp_str@ */
1035   0,                                    /* @tp_getattro@ */
1036   0,                                    /* @tp_setattro@ */
1037   0,                                    /* @tp_as_buffer@ */
1038   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1039     Py_TPFLAGS_BASETYPE,
1040
1041   /* @tp_doc@ */
1042   "TLSDataExpansion(KEY, SEED, [mac = sha_hmac]):\n"
1043   "  TLS data expansion function.",
1044
1045   0,                                    /* @tp_traverse@ */
1046   0,                                    /* @tp_clear@ */
1047   0,                                    /* @tp_richcompare@ */
1048   0,                                    /* @tp_weaklistoffset@ */
1049   0,                                    /* @tp_iter@ */
1050   0,                                    /* @tp_iternext@ */
1051   0,                                    /* @tp_methods@ */
1052   0,                                    /* @tp_members@ */
1053   0,                                    /* @tp_getset@ */
1054   0,                                    /* @tp_base@ */
1055   0,                                    /* @tp_dict@ */
1056   0,                                    /* @tp_descr_get@ */
1057   0,                                    /* @tp_descr_set@ */
1058   0,                                    /* @tp_dictoffset@ */
1059   0,                                    /* @tp_init@ */
1060   PyType_GenericAlloc,                  /* @tp_alloc@ */
1061   tlsdx_pynew,                          /* @tp_new@ */
1062   0,                                    /* @tp_free@ */
1063   0                                     /* @tp_is_gc@ */
1064 };
1065
1066 static const PyTypeObject tlsprf_pytype_skel = {
1067   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1068   "TLSPRF",                             /* @tp_name@ */
1069   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1070   0,                                    /* @tp_itemsize@ */
1071
1072   grand_pydealloc,                      /* @tp_dealloc@ */
1073   0,                                    /* @tp_print@ */
1074   0,                                    /* @tp_getattr@ */
1075   0,                                    /* @tp_setattr@ */
1076   0,                                    /* @tp_compare@ */
1077   0,                                    /* @tp_repr@ */
1078   0,                                    /* @tp_as_number@ */
1079   0,                                    /* @tp_as_sequence@ */
1080   0,                                    /* @tp_as_mapping@ */
1081   0,                                    /* @tp_hash@ */
1082   0,                                    /* @tp_call@ */
1083   0,                                    /* @tp_str@ */
1084   0,                                    /* @tp_getattro@ */
1085   0,                                    /* @tp_setattro@ */
1086   0,                                    /* @tp_as_buffer@ */
1087   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1088     Py_TPFLAGS_BASETYPE,
1089
1090   /* @tp_doc@ */
1091   "TLSPRF(KEY, SEED, [lmac = md5_hmac], [rmac = sha_hmac]):\n"
1092   "  TLS pseudorandom function.",
1093
1094   0,                                    /* @tp_traverse@ */
1095   0,                                    /* @tp_clear@ */
1096   0,                                    /* @tp_richcompare@ */
1097   0,                                    /* @tp_weaklistoffset@ */
1098   0,                                    /* @tp_iter@ */
1099   0,                                    /* @tp_iternext@ */
1100   0,                                    /* @tp_methods@ */
1101   0,                                    /* @tp_members@ */
1102   0,                                    /* @tp_getset@ */
1103   0,                                    /* @tp_base@ */
1104   0,                                    /* @tp_dict@ */
1105   0,                                    /* @tp_descr_get@ */
1106   0,                                    /* @tp_descr_set@ */
1107   0,                                    /* @tp_dictoffset@ */
1108   0,                                    /* @tp_init@ */
1109   PyType_GenericAlloc,                  /* @tp_alloc@ */
1110   tlsprf_pynew,                         /* @tp_new@ */
1111   0,                                    /* @tp_free@ */
1112   0                                     /* @tp_is_gc@ */
1113 };
1114
1115 /*----- DSA generator -----------------------------------------------------*/
1116
1117 static PyObject *dsarand_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1118 {
1119   struct bin in;
1120   PyObject *rc = 0;
1121   static const char *const kwlist[] = { "seed", 0 };
1122
1123   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &in))
1124     goto end;
1125   rc = grand_dopywrap(ty, dsarand_create(in.p, in.sz), f_freeme);
1126 end:
1127   return (rc);
1128 }
1129
1130 static PyObject *drget_seed(PyObject *me, void *hunoz)
1131 {
1132   grand *r = GRAND_R(me);
1133   int n = r->ops->misc(r, DSARAND_SEEDSZ);
1134   PyObject *rc = bytestring_pywrap(0, n);
1135   r->ops->misc(r, DSARAND_GETSEED, BIN_PTR(rc));
1136   return (rc);
1137 }
1138
1139 static const PyGetSetDef dsarand_pygetset[] = {
1140 #define GETSETNAME(op, name) dr##op##_##name
1141   GET   (seed,          "R.seed -> current generator seed")
1142 #undef GETSETNAME
1143   { 0 }
1144 };
1145
1146 static const PyTypeObject dsarand_pytype_skel = {
1147   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1148   "DSARand",                            /* @tp_name@ */
1149   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1150   0,                                    /* @tp_itemsize@ */
1151
1152   grand_pydealloc,                      /* @tp_dealloc@ */
1153   0,                                    /* @tp_print@ */
1154   0,                                    /* @tp_getattr@ */
1155   0,                                    /* @tp_setattr@ */
1156   0,                                    /* @tp_compare@ */
1157   0,                                    /* @tp_repr@ */
1158   0,                                    /* @tp_as_number@ */
1159   0,                                    /* @tp_as_sequence@ */
1160   0,                                    /* @tp_as_mapping@ */
1161   0,                                    /* @tp_hash@ */
1162   0,                                    /* @tp_call@ */
1163   0,                                    /* @tp_str@ */
1164   0,                                    /* @tp_getattro@ */
1165   0,                                    /* @tp_setattro@ */
1166   0,                                    /* @tp_as_buffer@ */
1167   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1168     Py_TPFLAGS_BASETYPE,
1169
1170   /* @tp_doc@ */
1171   "DSARand(SEED): pseudorandom number generator for DSA parameters.",
1172
1173   0,                                    /* @tp_traverse@ */
1174   0,                                    /* @tp_clear@ */
1175   0,                                    /* @tp_richcompare@ */
1176   0,                                    /* @tp_weaklistoffset@ */
1177   0,                                    /* @tp_iter@ */
1178   0,                                    /* @tp_iternext@ */
1179   0,                                    /* @tp_methods@ */
1180   0,                                    /* @tp_members@ */
1181   PYGETSET(dsarand),                    /* @tp_getset@ */
1182   0,                                    /* @tp_base@ */
1183   0,                                    /* @tp_dict@ */
1184   0,                                    /* @tp_descr_get@ */
1185   0,                                    /* @tp_descr_set@ */
1186   0,                                    /* @tp_dictoffset@ */
1187   0,                                    /* @tp_init@ */
1188   PyType_GenericAlloc,                  /* @tp_alloc@ */
1189   dsarand_pynew,                        /* @tp_new@ */
1190   0,                                    /* @tp_free@ */
1191   0                                     /* @tp_is_gc@ */
1192 };
1193
1194 /*----- Blum-Blum-Shub generator ------------------------------------------*/
1195
1196 static PyObject *bbs_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1197 {
1198   mp *n = 0, *x = MP_TWO;
1199   PyObject *rc = 0;
1200   static const char *const kwlist[] = { "n", "x", 0 };
1201
1202   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&:new", KWLIST,
1203                                    convmp, &n, convmp, &x))
1204     goto end;
1205   rc = grand_dopywrap(ty, bbs_rand(n, x), f_freeme);
1206 end:
1207   mp_drop(n);
1208   mp_drop(x);
1209   return (rc);
1210 }
1211
1212 static PyObject *bbsmeth_step(PyObject *me)
1213   { grand *r = GRAND_R(me); r->ops->misc(r, BBS_STEP); RETURN_ME; }
1214
1215 static PyObject *bbsmeth_bits(PyObject *me, PyObject *arg)
1216 {
1217   grand *r = GRAND_R(me); unsigned n; uint32 w;
1218   if (!PyArg_ParseTuple(arg, "O&:bits", convuint, &n)) goto end;
1219   if (n > 32) VALERR("can't get more than 32 bits");
1220   r->ops->misc(r, BBS_BITS, n, &w); return (getulong(w));
1221 end:
1222   return (0);
1223 }
1224
1225 static PyObject *bbsmeth_wrap(PyObject *me)
1226   { grand *r = GRAND_R(me); r->ops->misc(r, BBS_WRAP); RETURN_ME; }
1227
1228 static PyObject *bbsget_n(PyObject *me, void *hunoz)
1229 {
1230   mp *x = MP_NEW; grand *r = GRAND_R(me);
1231   r->ops->misc(r, BBS_MOD, &x); return (mp_pywrap(x));
1232 }
1233
1234 static PyObject *bbsget_x(PyObject *me, void *hunoz)
1235 {
1236   mp *x = MP_NEW; grand *r = GRAND_R(me);
1237   r->ops->misc(r, BBS_STATE, &x); return (mp_pywrap(x));
1238 }
1239
1240 static int bbsset_x(PyObject *me, PyObject *val, void *hunoz)
1241 {
1242   mp *x = 0; grand *r = GRAND_R(me); int rc = -1; if (!val) NIERR("__del__");
1243   if ((x = getmp(val)) == 0) goto end;
1244   r->ops->misc(r, BBS_SET, x); rc = 0;
1245   end: mp_drop(x); return (rc);
1246 }
1247
1248 static PyObject *bbsget_stepsz(PyObject *me, void *hunoz)
1249 {
1250   grand *r = GRAND_R(me);
1251   return (PyInt_FromLong(r->ops->misc(r, BBS_STEPSZ)));
1252 }
1253
1254 static const PyMethodDef bbs_pymethods[] = {
1255 #define METHNAME(name) bbsmeth_##name
1256   NAMETH(step,          "R.step(): steps the generator (not useful)")
1257   METH  (bits,   "R.bits(N) -> W: returns N bits (<= 32) from the generator")
1258   NAMETH(wrap,          "R.wrap(): flushes unused bits in internal buffer")
1259 #undef METHNAME
1260   { 0 }
1261 };
1262
1263 static const PyGetSetDef bbs_pygetset[] = {
1264 #define GETSETNAME(op, name) bbs##op##_##name
1265   GET   (n,             "R.n -> Blum modulus")
1266   GETSET(x,             "R.x -> current seed value")
1267   GET   (stepsz,        "R.stepsz -> number of bits generated per step")
1268 #undef GETSETNAME
1269   { 0 }
1270 };
1271
1272 static const PyTypeObject bbs_pytype_skel = {
1273   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1274   "BlumBlumShub",                       /* @tp_name@ */
1275   sizeof(grand_pyobj),                  /* @tp_basicsize@ */
1276   0,                                    /* @tp_itemsize@ */
1277
1278   grand_pydealloc,                      /* @tp_dealloc@ */
1279   0,                                    /* @tp_print@ */
1280   0,                                    /* @tp_getattr@ */
1281   0,                                    /* @tp_setattr@ */
1282   0,                                    /* @tp_compare@ */
1283   0,                                    /* @tp_repr@ */
1284   0,                                    /* @tp_as_number@ */
1285   0,                                    /* @tp_as_sequence@ */
1286   0,                                    /* @tp_as_mapping@ */
1287   0,                                    /* @tp_hash@ */
1288   0,                                    /* @tp_call@ */
1289   0,                                    /* @tp_str@ */
1290   0,                                    /* @tp_getattro@ */
1291   0,                                    /* @tp_setattro@ */
1292   0,                                    /* @tp_as_buffer@ */
1293   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1294     Py_TPFLAGS_BASETYPE,
1295
1296   /* @tp_doc@ */
1297   "BlumBlumShub(N, [x = 2]): Blum-Blum-Shub pseudorandom number generator.",
1298
1299   0,                                    /* @tp_traverse@ */
1300   0,                                    /* @tp_clear@ */
1301   0,                                    /* @tp_richcompare@ */
1302   0,                                    /* @tp_weaklistoffset@ */
1303   0,                                    /* @tp_iter@ */
1304   0,                                    /* @tp_iternext@ */
1305   PYMETHODS(bbs),                       /* @tp_methods@ */
1306   0,                                    /* @tp_members@ */
1307   PYGETSET(bbs),                        /* @tp_getset@ */
1308   0,                                    /* @tp_base@ */
1309   0,                                    /* @tp_dict@ */
1310   0,                                    /* @tp_descr_get@ */
1311   0,                                    /* @tp_descr_set@ */
1312   0,                                    /* @tp_dictoffset@ */
1313   0,                                    /* @tp_init@ */
1314   PyType_GenericAlloc,                  /* @tp_alloc@ */
1315   bbs_pynew,                            /* @tp_new@ */
1316   0,                                    /* @tp_free@ */
1317   0                                     /* @tp_is_gc@ */
1318 };
1319
1320 typedef struct bbspriv_pyobj {
1321   grand_pyobj gr;
1322   bbs_priv bp;
1323 } bbspriv_pyobj;
1324
1325 #define BBSPRIV_BP(o) (&((bbspriv_pyobj *)(o))->bp)
1326
1327 static PyObject *bbspriv_pynew(PyTypeObject *ty,
1328                                PyObject *arg, PyObject *kw)
1329 {
1330   mp *p = 0, *q = 0, *n = 0, *x = MP_TWO;
1331   bbspriv_pyobj *rc = 0;
1332   static const char *const kwlist[] = { "n", "p", "q", "seed", 0 };
1333
1334   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&O&O&:new", KWLIST,
1335                                    convmp, &n, convmp, &p, convmp, &q,
1336                                    convmp, &x))
1337     goto end;
1338   if (!n + !p + !q > 1) VALERR("must specify at least two of n, p, q");
1339   if (!n) n = mp_mul(MP_NEW, p, q);
1340   else if (!p) mp_div(&p, 0, n, q);
1341   else if (!q) mp_div(&q, 0, n, p);
1342   rc = (bbspriv_pyobj *)ty->tp_alloc(ty, 0);
1343   rc->gr.r = bbs_rand(n, x);
1344   rc->gr.f = f_freeme;
1345   rc->bp.p = MP_COPY(p);
1346   rc->bp.q = MP_COPY(q);
1347   rc->bp.n = MP_COPY(n);
1348 end:
1349   mp_drop(p); mp_drop(q); mp_drop(n); mp_drop(x);
1350   return ((PyObject *)rc);
1351 }
1352
1353 static PyObject *bpmeth_generate(PyObject *me, PyObject *arg, PyObject *kw)
1354 {
1355   bbs_priv bp = { 0 };
1356   mp *x = MP_TWO;
1357   struct excinfo exc = EXCINFO_INIT;
1358   pypgev evt = { { 0 } };
1359   unsigned nbits, n = 0;
1360   grand *r = &rand_global;
1361   static const char *const kwlist[] =
1362     { "nbits", "event", "rng", "nsteps", "seed", 0 };
1363   bbspriv_pyobj *rc = 0;
1364
1365   evt.exc = &exc;
1366   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O&O&O&O&:generate", KWLIST,
1367                                    convuint, &nbits, convpgev, &evt,
1368                                    convgrand, &r, convuint, &n, convmp, &x))
1369     goto end;
1370   if (bbs_gen(&bp, nbits, r, n, evt.ev.proc, evt.ev.ctx))
1371     PGENERR(&exc);
1372   rc = PyObject_New(bbspriv_pyobj, bbspriv_pytype);
1373   rc->gr.r = bbs_rand(bp.n, x);
1374   rc->gr.f = f_freeme;
1375   rc->bp.p = MP_COPY(bp.p);
1376   rc->bp.q = MP_COPY(bp.q);
1377   rc->bp.n = MP_COPY(bp.n);
1378 end:
1379   mp_drop(bp.p); mp_drop(bp.q); mp_drop(bp.n); mp_drop(x);
1380   return ((PyObject *)rc);
1381 }
1382
1383 static void bbspriv_pydealloc(PyObject *me)
1384 {
1385   bbs_priv *bp = BBSPRIV_BP(me);
1386   mp_drop(bp->n);
1387   mp_drop(bp->p);
1388   mp_drop(bp->q);
1389   grand_pydealloc(me);
1390 }
1391
1392 static PyObject *bpmeth_ff(PyObject *me, PyObject *arg)
1393 {
1394   mp *n = 0; grand *r = GRAND_R(me); bbs_priv *bp = BBSPRIV_BP(me);
1395   if (!PyArg_ParseTuple(arg, "O&:ff", convmp, &n)) return (0);
1396   r->ops->misc(r, BBS_FF, bp, n); RETURN_ME;
1397 }
1398
1399 static PyObject *bpmeth_rew(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&:rew", convmp, &n)) return (0);
1403   r->ops->misc(r, BBS_REW, bp, n); RETURN_ME;
1404 }
1405
1406 static PyObject *bpget_n(PyObject *me, void *hunoz)
1407   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->n))); }
1408
1409 static PyObject *bpget_p(PyObject *me, void *hunoz)
1410   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->p))); }
1411
1412 static PyObject *bpget_q(PyObject *me, void *hunoz)
1413   { return (mp_pywrap(MP_COPY(BBSPRIV_BP(me)->q))); }
1414
1415 static const PyMethodDef bbspriv_pymethods[] = {
1416 #define METHNAME(name) bpmeth_##name
1417   METH  (ff,            "R.ff(N): fast-forward N places")
1418   METH  (rew,           "R.rew(N): rewind N places")
1419   KWSMTH(generate,      "generate(NBITS, [event = pgen_nullev], "
1420                               "[rng = rand], [nsteps = 0], [seed = 2]) -> R")
1421 #undef METHNAME
1422   { 0 }
1423 };
1424
1425 static const PyGetSetDef bbspriv_pygetset[] = {
1426 #define GETSETNAME(op, name) bp##op##_##name
1427   GET   (n,             "R.n -> Blum modulus")
1428   GET   (p,             "R.p -> one of the factors of the modulus")
1429   GET   (q,             "R.q -> one of the factors of the modulus")
1430 #undef GETSETNAME
1431   { 0 }
1432 };
1433
1434 static const PyTypeObject bbspriv_pytype_skel = {
1435   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1436   "BBSPriv",                            /* @tp_name@ */
1437   sizeof(bbspriv_pyobj),                /* @tp_basicsize@ */
1438   0,                                    /* @tp_itemsize@ */
1439
1440   bbspriv_pydealloc,                    /* @tp_dealloc@ */
1441   0,                                    /* @tp_print@ */
1442   0,                                    /* @tp_getattr@ */
1443   0,                                    /* @tp_setattr@ */
1444   0,                                    /* @tp_compare@ */
1445   0,                                    /* @tp_repr@ */
1446   0,                                    /* @tp_as_number@ */
1447   0,                                    /* @tp_as_sequence@ */
1448   0,                                    /* @tp_as_mapping@ */
1449   0,                                    /* @tp_hash@ */
1450   0,                                    /* @tp_call@ */
1451   0,                                    /* @tp_str@ */
1452   0,                                    /* @tp_getattro@ */
1453   0,                                    /* @tp_setattro@ */
1454   0,                                    /* @tp_as_buffer@ */
1455   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1456     Py_TPFLAGS_BASETYPE,
1457
1458   /* @tp_doc@ */
1459   "BBSPriv(..., [seed = 2]): Blum-Blum-Shub, with private key.\n"
1460   "  Keywords: n, p, q; must provide at least two",
1461
1462   0,                                    /* @tp_traverse@ */
1463   0,                                    /* @tp_clear@ */
1464   0,                                    /* @tp_richcompare@ */
1465   0,                                    /* @tp_weaklistoffset@ */
1466   0,                                    /* @tp_iter@ */
1467   0,                                    /* @tp_iternext@ */
1468   PYMETHODS(bbspriv),                   /* @tp_methods@ */
1469   0,                                    /* @tp_members@ */
1470   PYGETSET(bbspriv),                    /* @tp_getset@ */
1471   0,                                    /* @tp_base@ */
1472   0,                                    /* @tp_dict@ */
1473   0,                                    /* @tp_descr_get@ */
1474   0,                                    /* @tp_descr_set@ */
1475   0,                                    /* @tp_dictoffset@ */
1476   0,                                    /* @tp_init@ */
1477   PyType_GenericAlloc,                  /* @tp_alloc@ */
1478   bbspriv_pynew,                        /* @tp_new@ */
1479   0,                                    /* @tp_free@ */
1480   0                                     /* @tp_is_gc@ */
1481 };
1482
1483 /*----- Global stuff ------------------------------------------------------*/
1484
1485 static const struct nameval consts[] = {
1486   CONST(RAND_IBITS),
1487   { 0 }
1488 };
1489
1490 void rand_pyinit(void)
1491 {
1492   INITTYPE(grand, root);
1493   INITTYPE(truerand, grand);
1494   INITTYPE(fibrand, grand);
1495   INITTYPE(lcrand, grand);
1496   INITTYPE(dsarand, grand);
1497   INITTYPE(bbs, grand);
1498   INITTYPE(bbspriv, bbs);
1499   INITTYPE(sslprf, grand);
1500   INITTYPE(tlsdx, grand);
1501   INITTYPE(tlsprf, grand);
1502   INITTYPE(gccrand, type);
1503   INITTYPE(gcrand, grand);
1504   INITTYPE(gclatinrand, gcrand);
1505   rand_noisesrc(RAND_GLOBAL, &noise_source);
1506   rand_seed(RAND_GLOBAL, 160);
1507 }
1508
1509 static const char *crand_namefn(const void *p)
1510   { const gccrand_info *const *cls = p; return (*cls ? (*cls)->name : 0); }
1511 static PyObject *crand_valfn(const void *p)
1512   { const gccrand_info *const *cls = p; return (gccrand_pywrap(*cls)); }
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 = make_algtab(gcrandtab, sizeof(gccrand_info *),
1531                               crand_namefn, crand_valfn);
1532   INSERT("gccrands", gccrands_dict); Py_INCREF(gccrands_dict);
1533   INSERT("rand", rand_pyobj);
1534   setconstants(mod, consts);
1535 }
1536
1537 /*----- That's all, folks -------------------------------------------------*/