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

   1 /* -*-c-*-
   2  *
   3  * Symmetric cryptography
   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 /*----- Key sizes ---------------------------------------------------------*/
  35
  36 PyTypeObject *keysz_pytype;
  37 PyTypeObject *keyszany_pytype, *keyszrange_pytype, *keyszset_pytype;
  38 PyObject *sha_pyobj, *has160_pyobj;
  39
  40 #ifndef KSZ_OPMASK
  41 #  define KSZ_OPMASK 0x1f
  42 #endif
  43
  44 #ifndef KSZ_16BIT
  45 #  define KSZ_16BIT 0x20
  46 #endif
  47
  48 PyObject *keysz_pywrap(const octet *k)
  49 {
  50   unsigned op = *k++;
  51 #define ARG(i) (op&KSZ_16BIT ? LOAD16(k + 2*(i)) : k[i])
  52   switch (op&KSZ_OPMASK) {
  53     case KSZ_ANY: {
  54       keysz_pyobj *o = PyObject_New(keysz_pyobj, keyszany_pytype);
  55       o->dfl = ARG(0);
  56       return ((PyObject *)o);
  57     } break;
  58     case KSZ_RANGE: {
  59       keyszrange_pyobj *o =
  60         PyObject_New(keyszrange_pyobj, keyszrange_pytype);
  61       o->dfl = ARG(0);
  62       o->min = ARG(1);
  63       o->max = ARG(2);
  64       o->mod = ARG(3);
  65       if (!o->mod) o->mod = 1;
  66       return ((PyObject *)o);
  67     } break;
  68     case KSZ_SET: {
  69       keyszset_pyobj *o =
  70         PyObject_New(keyszset_pyobj, keyszset_pytype);
  71       int i, n;
  72       o->dfl = ARG(0);
  73       for (i = 0; ARG(i); i++) ;
  74       n = i; o->set = PyTuple_New(n);
  75       for (i = 0; i < n; i++)
  76         PyTuple_SET_ITEM(o->set, i, PyInt_FromLong(ARG(i)));
  77       return ((PyObject *)o);
  78     } break;
  79     default:
  80       abort();
  81   }
  82 #undef ARG
  83 }
  84
  85 static PyObject *keyszany_pynew(PyTypeObject *ty,
  86                                 PyObject *arg, PyObject *kw)
  87 {
  88   static const char *const kwlist[] = { "default", 0 };
  89   int dfl;
  90   keysz_pyobj *o;
  91
  92   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", KWLIST, &dfl))
  93     goto end;
  94   if (dfl < 0) VALERR("key size cannot be negative");
  95   o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
  96   o->dfl = dfl;
  97   return ((PyObject *)o);
  98 end:
  99   return (0);
 100 }
 101
 102 static PyObject *keyszrange_pynew(PyTypeObject *ty,
 103                                   PyObject *arg, PyObject *kw)
 104 {
 105   static const char *const kwlist[] = { "default", "min", "max", "mod", 0 };
 106   int dfl, min = 0, max = 0, mod = 1;
 107   keyszrange_pyobj *o;
 108
 109   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iii:new", KWLIST,
 110                                    &dfl, &min, &max, &mod))
 111     goto end;
 112   if (dfl < 0 || min < 0) VALERR("key size cannot be negative");
 113   if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
 114   if (mod <= 0 || dfl%mod || min%mod || max%mod)
 115     VALERR("bad key size modulus");
 116   o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
 117   o->dfl = dfl;
 118   o->min = min;
 119   o->max = max;
 120   o->mod = mod;
 121   return ((PyObject *)o);
 122 end:
 123   return (0);
 124 }
 125
 126 static PyObject *keyszset_pynew(PyTypeObject *ty,
 127                                 PyObject *arg, PyObject *kw)
 128 {
 129   static const char *const kwlist[] = { "default", "set", 0 };
 130   int dfl, i, n, xx;
 131   PyObject *set = 0;
 132   PyObject *x = 0, *l = 0;
 133   keyszset_pyobj *o = 0;
 134
 135   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
 136     goto end;
 137   if (!set) set = PyTuple_New(0);
 138   else Py_INCREF(set);
 139   if (!PySequence_Check(set)) TYERR("want a sequence");
 140   n = PySequence_Size(set);
 141   l = PyList_New(0);
 142   if (PyErr_Occurred()) goto end;
 143   if (dfl < 0) VALERR("key size cannot be negative");
 144   x = PyInt_FromLong(dfl);
 145   PyList_Append(l, x);
 146   Py_DECREF(x);
 147   x = 0;
 148   for (i = 0; i < n; i++) {
 149     if ((x = PySequence_GetItem(set, i)) == 0) goto end;
 150     xx = PyInt_AsLong(x);
 151     if (PyErr_Occurred()) goto end;
 152     if (xx == dfl) continue;
 153     if (xx < 0) VALERR("key size cannot be negative");
 154     PyList_Append(l, x);
 155     Py_DECREF(x);
 156     x = 0;
 157   }
 158   Py_DECREF(set);
 159   if ((set = PySequence_Tuple(l)) == 0) goto end;
 160   o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
 161   o->dfl = dfl;
 162   o->set = set;
 163   Py_INCREF(set);
 164 end:
 165   Py_XDECREF(set);
 166   Py_XDECREF(l);
 167   Py_XDECREF(x);
 168   return ((PyObject *)o);
 169 }
 170
 171 static PyObject *kaget_min(PyObject *me, void *hunoz)
 172   { return (PyInt_FromLong(0)); }
 173 #define kaget_max kaget_min
 174
 175 static PyObject *ksget_min(PyObject *me, void *hunoz)
 176 {
 177   PyObject *set = ((keyszset_pyobj *)me)->set;
 178   int i, n, y, x = -1;
 179   n = PyTuple_Size(set);
 180   for (i = 0; i < n; i++) {
 181     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 182     if (x == -1 || y < x) x = y;
 183   }
 184   return (PyInt_FromLong(x));
 185 }
 186
 187 static PyObject *ksget_max(PyObject *me, void *hunoz)
 188 {
 189   PyObject *set = ((keyszset_pyobj *)me)->set;
 190   int i, n, y, x = -1;
 191   n = PyTuple_Size(set);
 192   for (i = 0; i < n; i++) {
 193     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 194     if (y > x) x = y;
 195   }
 196   return (PyInt_FromLong(x));
 197 }
 198
 199 static PyMemberDef keysz_pymembers[] = {
 200 #define MEMBERSTRUCT keysz_pyobj
 201 #define default dfl /* ugh! */
 202   MEMBER(default, T_INT, READONLY, "KSZ.default -> default key size")
 203 #undef default
 204 #undef MEMBERSTRUCT
 205   { 0 }
 206 };
 207
 208 static PyGetSetDef keyszany_pygetset[] = {
 209 #define GETSETNAME(op, name) ka##op##_##name
 210   GET   (min,                   "KSZ.min -> smallest allowed key size")
 211   GET   (max,                   "KSZ.min -> largest allowed key size")
 212 #undef GETSETNAME
 213   { 0 }
 214 };
 215
 216 static PyMemberDef keyszrange_pymembers[] = {
 217 #define MEMBERSTRUCT keyszrange_pyobj
 218   MEMBER(min, T_INT, READONLY,  "KSZ.min -> smallest allowed key size")
 219   MEMBER(max, T_INT, READONLY,  "KSZ.min -> largest allowed key size")
 220   MEMBER(mod, T_INT, READONLY,
 221          "KSZ.mod -> key size must be a multiple of this")
 222 #undef MEMBERSTRUCT
 223   { 0 }
 224 };
 225
 226 static PyGetSetDef keyszset_pygetset[] = {
 227 #define GETSETNAME(op, name) ks##op##_##name
 228   GET   (min,                   "KSZ.min -> smallest allowed key size")
 229   GET   (max,                   "KSZ.min -> largest allowed key size")
 230 #undef GETSETNAME
 231   { 0 }
 232 };
 233
 234 static PyMemberDef keyszset_pymembers[] = {
 235 #define MEMBERSTRUCT keyszset_pyobj
 236   MEMBER(set, T_OBJECT, READONLY,       "KSZ.set -> allowed key sizes")
 237 #undef MEMBERSTRUCT
 238   { 0 }
 239 };
 240
 241 static PyTypeObject keysz_pytype_skel = {
 242   PyObject_HEAD_INIT(0) 0,              /* Header */
 243   "KeySZ",                              /* @tp_name@ */
 244   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 245   0,                                    /* @tp_itemsize@ */
 246
 247   0,                                    /* @tp_dealloc@ */
 248   0,                                    /* @tp_print@ */
 249   0,                                    /* @tp_getattr@ */
 250   0,                                    /* @tp_setattr@ */
 251   0,                                    /* @tp_compare@ */
 252   0,                                    /* @tp_repr@ */
 253   0,                                    /* @tp_as_number@ */
 254   0,                                    /* @tp_as_sequence@ */
 255   0,                                    /* @tp_as_mapping@ */
 256   0,                                    /* @tp_hash@ */
 257   0,                                    /* @tp_call@ */
 258   0,                                    /* @tp_str@ */
 259   0,                                    /* @tp_getattro@ */
 260   0,                                    /* @tp_setattro@ */
 261   0,                                    /* @tp_as_buffer@ */
 262   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 263     Py_TPFLAGS_BASETYPE,
 264
 265   /* @tp_doc@ */
 266 "Key size constraints.  Abstract.",
 267
 268   0,                                    /* @tp_traverse@ */
 269   0,                                    /* @tp_clear@ */
 270   0,                                    /* @tp_richcompare@ */
 271   0,                                    /* @tp_weaklistoffset@ */
 272   0,                                    /* @tp_iter@ */
 273   0,                                    /* @tp_iternext@ */
 274   0,                                    /* @tp_methods@ */
 275   keysz_pymembers,                      /* @tp_members@ */
 276   0,                                    /* @tp_getset@ */
 277   0,                                    /* @tp_base@ */
 278   0,                                    /* @tp_dict@ */
 279   0,                                    /* @tp_descr_get@ */
 280   0,                                    /* @tp_descr_set@ */
 281   0,                                    /* @tp_dictoffset@ */
 282   0,                                    /* @tp_init@ */
 283   PyType_GenericAlloc,                  /* @tp_alloc@ */
 284   abstract_pynew,                       /* @tp_new@ */
 285   0,                                    /* @tp_free@ */
 286   0                                     /* @tp_is_gc@ */
 287 };
 288
 289 static PyTypeObject keyszany_pytype_skel = {
 290   PyObject_HEAD_INIT(0) 0,              /* Header */
 291   "KeySZAny",                           /* @tp_name@ */
 292   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 293   0,                                    /* @tp_itemsize@ */
 294
 295   0,                                    /* @tp_dealloc@ */
 296   0,                                    /* @tp_print@ */
 297   0,                                    /* @tp_getattr@ */
 298   0,                                    /* @tp_setattr@ */
 299   0,                                    /* @tp_compare@ */
 300   0,                                    /* @tp_repr@ */
 301   0,                                    /* @tp_as_number@ */
 302   0,                                    /* @tp_as_sequence@ */
 303   0,                                    /* @tp_as_mapping@ */
 304   0,                                    /* @tp_hash@ */
 305   0,                                    /* @tp_call@ */
 306   0,                                    /* @tp_str@ */
 307   0,                                    /* @tp_getattro@ */
 308   0,                                    /* @tp_setattro@ */
 309   0,                                    /* @tp_as_buffer@ */
 310   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 311     Py_TPFLAGS_BASETYPE,
 312
 313   /* @tp_doc@ */
 314 "KeySZAny(DEFAULT)\n\
 315   Key size constraints.  This object imposes no constraints on size.",
 316
 317   0,                                    /* @tp_traverse@ */
 318   0,                                    /* @tp_clear@ */
 319   0,                                    /* @tp_richcompare@ */
 320   0,                                    /* @tp_weaklistoffset@ */
 321   0,                                    /* @tp_iter@ */
 322   0,                                    /* @tp_iternext@ */
 323   0,                                    /* @tp_methods@ */
 324   0,                                    /* @tp_members@ */
 325   keyszany_pygetset,                    /* @tp_getset@ */
 326   0,                                    /* @tp_base@ */
 327   0,                                    /* @tp_dict@ */
 328   0,                                    /* @tp_descr_get@ */
 329   0,                                    /* @tp_descr_set@ */
 330   0,                                    /* @tp_dictoffset@ */
 331   0,                                    /* @tp_init@ */
 332   PyType_GenericAlloc,                  /* @tp_alloc@ */
 333   keyszany_pynew,                       /* @tp_new@ */
 334   0,                                    /* @tp_free@ */
 335   0                                     /* @tp_is_gc@ */
 336 };
 337
 338 static PyTypeObject keyszrange_pytype_skel = {
 339   PyObject_HEAD_INIT(0) 0,              /* Header */
 340   "KeySZRange",                         /* @tp_name@ */
 341   sizeof(keyszrange_pyobj),             /* @tp_basicsize@ */
 342   0,                                    /* @tp_itemsize@ */
 343
 344   0,                                    /* @tp_dealloc@ */
 345   0,                                    /* @tp_print@ */
 346   0,                                    /* @tp_getattr@ */
 347   0,                                    /* @tp_setattr@ */
 348   0,                                    /* @tp_compare@ */
 349   0,                                    /* @tp_repr@ */
 350   0,                                    /* @tp_as_number@ */
 351   0,                                    /* @tp_as_sequence@ */
 352   0,                                    /* @tp_as_mapping@ */
 353   0,                                    /* @tp_hash@ */
 354   0,                                    /* @tp_call@ */
 355   0,                                    /* @tp_str@ */
 356   0,                                    /* @tp_getattro@ */
 357   0,                                    /* @tp_setattro@ */
 358   0,                                    /* @tp_as_buffer@ */
 359   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 360     Py_TPFLAGS_BASETYPE,
 361
 362   /* @tp_doc@ */
 363 "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n\
 364   Key size constraints.  Key size must be between MIN and MAX inclusive,\n\
 365   and be a multiple of MOD.",
 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   keyszrange_pymembers,                 /* @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   keyszrange_pynew,                     /* @tp_new@ */
 384   0,                                    /* @tp_free@ */
 385   0                                     /* @tp_is_gc@ */
 386 };
 387
 388 static PyTypeObject keyszset_pytype_skel = {
 389   PyObject_HEAD_INIT(0) 0,              /* Header */
 390   "KeySZSet",                           /* @tp_name@ */
 391   sizeof(keyszset_pyobj),               /* @tp_basicsize@ */
 392   0,                                    /* @tp_itemsize@ */
 393
 394   0,                                    /* @tp_dealloc@ */
 395   0,                                    /* @tp_print@ */
 396   0,                                    /* @tp_getattr@ */
 397   0,                                    /* @tp_setattr@ */
 398   0,                                    /* @tp_compare@ */
 399   0,                                    /* @tp_repr@ */
 400   0,                                    /* @tp_as_number@ */
 401   0,                                    /* @tp_as_sequence@ */
 402   0,                                    /* @tp_as_mapping@ */
 403   0,                                    /* @tp_hash@ */
 404   0,                                    /* @tp_call@ */
 405   0,                                    /* @tp_str@ */
 406   0,                                    /* @tp_getattro@ */
 407   0,                                    /* @tp_setattro@ */
 408   0,                                    /* @tp_as_buffer@ */
 409   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 410     Py_TPFLAGS_BASETYPE,
 411
 412   /* @tp_doc@ */
 413 "KeySZSet(DEFAULT, SEQ)\n\
 414   Key size constraints.  Key size must be DEFAULT or one in SEQ.",
 415
 416   0,                                    /* @tp_traverse@ */
 417   0,                                    /* @tp_clear@ */
 418   0,                                    /* @tp_richcompare@ */
 419   0,                                    /* @tp_weaklistoffset@ */
 420   0,                                    /* @tp_iter@ */
 421   0,                                    /* @tp_iternext@ */
 422   0,                                    /* @tp_methods@ */
 423   keyszset_pymembers,                   /* @tp_members@ */
 424   keyszset_pygetset,                    /* @tp_getset@ */
 425   0,                                    /* @tp_base@ */
 426   0,                                    /* @tp_dict@ */
 427   0,                                    /* @tp_descr_get@ */
 428   0,                                    /* @tp_descr_set@ */
 429   0,                                    /* @tp_dictoffset@ */
 430   0,                                    /* @tp_init@ */
 431   PyType_GenericAlloc,                  /* @tp_alloc@ */
 432   keyszset_pynew,                       /* @tp_new@ */
 433   0,                                    /* @tp_free@ */
 434   0                                     /* @tp_is_gc@ */
 435 };
 436
 437 #define KSZCONVOP(op)                                                   \
 438   static PyObject *meth__KeySZ_##op(PyObject *me, PyObject *arg)        \
 439   {                                                                     \
 440     double x, y;                                                        \
 441     if (!PyArg_ParseTuple(arg, "Od:" #op, &me, &x)) return (0);         \
 442     y = keysz_##op(x);                                                  \
 443     return (PyFloat_FromDouble(y));                                     \
 444   }
 445 KSZCONVOP(fromdl)
 446 KSZCONVOP(fromschnorr)
 447 KSZCONVOP(fromif)
 448 KSZCONVOP(fromec)
 449 KSZCONVOP(todl)
 450 KSZCONVOP(toschnorr)
 451 KSZCONVOP(toif)
 452 KSZCONVOP(toec)
 453 #undef KSZCONVOP
 454
 455 /*----- Symmetric encryption ----------------------------------------------*/
 456
 457 PyTypeObject *gccipher_pytype, *gcipher_pytype;
 458
 459 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
 460 CONVFUNC(gcipher, gcipher *, GCIPHER_C)
 461
 462 PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
 463 {
 464   gcipher_pyobj *g;
 465   if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
 466   else Py_INCREF(cobj);
 467   g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
 468   g->c = c;
 469   return ((PyObject *)g);
 470 }
 471
 472 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 473 {
 474   static const char *const kwlist[] = { "k", 0 };
 475   char *k;
 476   Py_ssize_t sz;
 477
 478   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
 479     goto end;
 480   if (keysz(sz, GCCIPHER_CC(ty)->keysz) != sz) VALERR("bad key length");
 481   return (gcipher_pywrap((PyObject *)ty,
 482                          GC_INIT(GCCIPHER_CC(ty), k, sz)));
 483 end:
 484   return (0);
 485 }
 486
 487 PyObject *gccipher_pywrap(gccipher *cc)
 488 {
 489   gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
 490   g->cc = cc;
 491   g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
 492   g->ty.ht_type.tp_base = gcipher_pytype;
 493   Py_INCREF(gcipher_pytype);
 494   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 495                             Py_TPFLAGS_BASETYPE |
 496                             Py_TPFLAGS_HEAPTYPE);
 497   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 498   g->ty.ht_type.tp_free = 0;
 499   g->ty.ht_type.tp_new = gcipher_pynew;
 500   typeready(&g->ty.ht_type);
 501   return ((PyObject *)g);
 502 }
 503
 504 static void gcipher_pydealloc(PyObject *me)
 505 {
 506   GC_DESTROY(GCIPHER_C(me));
 507   Py_DECREF(me->ob_type);
 508   FREEOBJ(me);
 509 }
 510
 511 static PyObject *gccget_name(PyObject *me, void *hunoz)
 512   { return (PyString_FromString(GCCIPHER_CC(me)->name)); }
 513
 514 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
 515   { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
 516
 517 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
 518   { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
 519
 520 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
 521 {
 522   char *p;
 523   Py_ssize_t sz;
 524   PyObject *rc = 0;
 525
 526   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &sz)) return (0);
 527   rc = bytestring_pywrap(0, sz);
 528   GC_ENCRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 529   return (rc);
 530 }
 531
 532 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
 533 {
 534   char *p;
 535   int sz;
 536   PyObject *rc = 0;
 537
 538   if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
 539   rc = bytestring_pywrap(0, sz);
 540   p = PyString_AS_STRING(rc);
 541   memset(p, 0, sz);
 542   GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
 543   return (rc);
 544 }
 545
 546 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
 547 {
 548   char *p;
 549   Py_ssize_t sz;
 550   PyObject *rc = 0;
 551
 552   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &sz)) return (0);
 553   rc = bytestring_pywrap(0, sz);
 554   GC_DECRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 555   return (rc);
 556 }
 557
 558 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
 559 {
 560   char *p;
 561   int sz;
 562   PyObject *rc = 0;
 563
 564   if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
 565   rc = bytestring_pywrap(0, sz);
 566   p = PyString_AS_STRING(rc);
 567   memset(p, 0, sz);
 568   GC_DECRYPT(GCIPHER_C(me), p, p, sz);
 569   return (rc);
 570 }
 571
 572 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
 573 {
 574   char *p;
 575   Py_ssize_t sz;
 576
 577   if (!PyArg_ParseTuple(arg, "s#:setiv", &p, &sz)) goto end;
 578   if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
 579   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 580   if (sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
 581   GC_SETIV(GCIPHER_C(me), p);
 582   RETURN_ME;
 583 end:
 584   return (0);
 585 }
 586
 587 static PyObject *gcmeth_bdry(PyObject *me, PyObject *arg)
 588 {
 589   if (!PyArg_ParseTuple(arg, ":bdry")) goto end;
 590   if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
 591   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 592   GC_BDRY(GCIPHER_C(me));
 593   RETURN_ME;
 594 end:
 595   return (0);
 596 }
 597
 598 static PyGetSetDef gccipher_pygetset[] = {
 599 #define GETSETNAME(op, name) gcc##op##_##name
 600   GET   (keysz,                 "CC.keysz -> acceptable key sizes")
 601   GET   (blksz,                 "CC.blksz -> block size, or zero")
 602   GET   (name,                  "CC.name -> name of this kind of cipher")
 603 #undef GETSETNAME
 604   { 0 }
 605 };
 606
 607 static PyMethodDef gcipher_pymethods[] = {
 608 #define METHNAME(name) gcmeth_##name
 609   METH  (encrypt,               "C.encrypt(PT) -> CT")
 610   METH  (enczero,               "C.enczero(N) -> CT")
 611   METH  (decrypt,               "C.decrypt(CT) -> PT")
 612   METH  (deczero,               "C.deczero(N) -> PT")
 613   METH  (setiv,                 "C.setiv(IV)")
 614   METH  (bdry,                  "C.bdry()")
 615 #undef METHNAME
 616   { 0 }
 617 };
 618
 619 static PyTypeObject gccipher_pytype_skel = {
 620   PyObject_HEAD_INIT(0) 0,              /* Header */
 621   "GCCipher",                           /* @tp_name@ */
 622   sizeof(gccipher_pyobj),               /* @tp_basicsize@ */
 623   0,                                    /* @tp_itemsize@ */
 624
 625   0,                                    /* @tp_dealloc@ */
 626   0,                                    /* @tp_print@ */
 627   0,                                    /* @tp_getattr@ */
 628   0,                                    /* @tp_setattr@ */
 629   0,                                    /* @tp_compare@ */
 630   0,                                    /* @tp_repr@ */
 631   0,                                    /* @tp_as_number@ */
 632   0,                                    /* @tp_as_sequence@ */
 633   0,                                    /* @tp_as_mapping@ */
 634   0,                                    /* @tp_hash@ */
 635   0,                                    /* @tp_call@ */
 636   0,                                    /* @tp_str@ */
 637   0,                                    /* @tp_getattro@ */
 638   0,                                    /* @tp_setattro@ */
 639   0,                                    /* @tp_as_buffer@ */
 640   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 641     Py_TPFLAGS_BASETYPE,
 642
 643   /* @tp_doc@ */
 644 "Symmetric cipher metaclass.",
 645
 646   0,                                    /* @tp_traverse@ */
 647   0,                                    /* @tp_clear@ */
 648   0,                                    /* @tp_richcompare@ */
 649   0,                                    /* @tp_weaklistoffset@ */
 650   0,                                    /* @tp_iter@ */
 651   0,                                    /* @tp_iternext@ */
 652   0,                                    /* @tp_methods@ */
 653   0,                                    /* @tp_members@ */
 654   gccipher_pygetset,                    /* @tp_getset@ */
 655   0,                                    /* @tp_base@ */
 656   0,                                    /* @tp_dict@ */
 657   0,                                    /* @tp_descr_get@ */
 658   0,                                    /* @tp_descr_set@ */
 659   0,                                    /* @tp_dictoffset@ */
 660   0,                                    /* @tp_init@ */
 661   PyType_GenericAlloc,                  /* @tp_alloc@ */
 662   abstract_pynew,                       /* @tp_new@ */
 663   0,                                    /* @tp_free@ */
 664   0                                     /* @tp_is_gc@ */
 665 };
 666
 667 static PyTypeObject gcipher_pytype_skel = {
 668   PyObject_HEAD_INIT(0) 0,              /* Header */
 669   "GCipher",                            /* @tp_name@ */
 670   sizeof(gcipher_pyobj),                /* @tp_basicsize@ */
 671   0,                                    /* @tp_itemsize@ */
 672
 673   gcipher_pydealloc,                    /* @tp_dealloc@ */
 674   0,                                    /* @tp_print@ */
 675   0,                                    /* @tp_getattr@ */
 676   0,                                    /* @tp_setattr@ */
 677   0,                                    /* @tp_compare@ */
 678   0,                                    /* @tp_repr@ */
 679   0,                                    /* @tp_as_number@ */
 680   0,                                    /* @tp_as_sequence@ */
 681   0,                                    /* @tp_as_mapping@ */
 682   0,                                    /* @tp_hash@ */
 683   0,                                    /* @tp_call@ */
 684   0,                                    /* @tp_str@ */
 685   0,                                    /* @tp_getattro@ */
 686   0,                                    /* @tp_setattro@ */
 687   0,                                    /* @tp_as_buffer@ */
 688   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 689     Py_TPFLAGS_BASETYPE,
 690
 691   /* @tp_doc@ */
 692 "Symmetric cipher, abstract base class.",
 693
 694   0,                                    /* @tp_traverse@ */
 695   0,                                    /* @tp_clear@ */
 696   0,                                    /* @tp_richcompare@ */
 697   0,                                    /* @tp_weaklistoffset@ */
 698   0,                                    /* @tp_iter@ */
 699   0,                                    /* @tp_iternext@ */
 700   gcipher_pymethods,                    /* @tp_methods@ */
 701   0,                                    /* @tp_members@ */
 702   0,                                    /* @tp_getset@ */
 703   0,                                    /* @tp_base@ */
 704   0,                                    /* @tp_dict@ */
 705   0,                                    /* @tp_descr_get@ */
 706   0,                                    /* @tp_descr_set@ */
 707   0,                                    /* @tp_dictoffset@ */
 708   0,                                    /* @tp_init@ */
 709   PyType_GenericAlloc,                  /* @tp_alloc@ */
 710   abstract_pynew,                       /* @tp_new@ */
 711   0,                                    /* @tp_free@ */
 712   0                                     /* @tp_is_gc@ */
 713 };
 714
 715 /*----- Authenticated encryption ------------------------------------------*/
 716
 717 PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
 718 PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
 719 PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
 720 PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
 721
 722 CONVFUNC(gcaead, gcaead *, GCAEAD_AEC)
 723 CONVFUNC(gaeadkey, gaead_key *, GAEADKEY_K)
 724
 725 PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
 726 {
 727   gaeadkey_pyobj *gk;
 728
 729   if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
 730   else Py_INCREF(cobj);
 731   gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
 732   gk->k = k;
 733   return ((PyObject *)gk);
 734 }
 735
 736 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
 737                                 PyObject *arg, PyObject *kw)
 738 {
 739   static const char *const kwlist[] = { "k", 0 };
 740   char *k;
 741   Py_ssize_t sz;
 742
 743   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
 744     goto end;
 745   if (keysz(sz, GCAEAD_AEC(ty)->keysz) != sz) VALERR("bad key length");
 746   return (gaeadkey_pywrap((PyObject *)ty,
 747                           GAEAD_KEY(GCAEAD_AEC(ty), k, sz)));
 748 end:
 749   return (0);
 750 }
 751
 752 PyObject *gcaead_pywrap(gcaead *aec)
 753 {
 754   gcaead_pyobj *gck;
 755   gcaeadaad_pyobj *gca;
 756   gcaeadenc_pyobj *gce;
 757   gcaeaddec_pyobj *gcd;
 758
 759 #define MKTYPE(obj, thing, newfn, namefmt) do {                         \
 760   (obj) = newtype(gcaead_pytype, 0, 0);                                 \
 761   (obj)->ty.ht_name = PyString_FromFormat(namefmt, aec->name);          \
 762   (obj)->ty.ht_type.tp_name = PyString_AS_STRING((obj)->ty.ht_name);    \
 763   (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj);        \
 764   (obj)->ty.ht_type.tp_base = gaead##thing##_pytype;                    \
 765   Py_INCREF(gaead##thing##_pytype);                                     \
 766   (obj)->ty.ht_type.tp_flags =                                          \
 767     (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE);   \
 768   (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc;                     \
 769   (obj)->ty.ht_type.tp_free = 0;                                        \
 770   (obj)->ty.ht_type.tp_new = newfn;                                     \
 771   typeready(&(obj)->ty.ht_type);                                        \
 772 } while (0)
 773
 774   MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
 775   MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
 776   MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
 777   MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
 778
 779 #undef MKTYPE
 780
 781   gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
 782   gca->key = gce->key = gcd->key = gck;
 783   return ((PyObject *)gck);
 784 }
 785
 786 static void gaeadkey_pydealloc(PyObject *me)
 787   { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(me->ob_type); FREEOBJ(me); }
 788
 789 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
 790   { return (PyString_FromString(GCAEAD_AEC(me)->name)); }
 791
 792 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
 793   { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
 794
 795 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
 796   { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
 797
 798 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
 799   { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
 800
 801 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
 802   { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
 803
 804 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
 805   { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
 806
 807 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
 808   { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
 809
 810 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
 811   { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
 812
 813 static PyGetSetDef gcaead_pygetset[] = {
 814 #define GETSETNAME(op, name) gcae##op##_##name
 815   GET   (keysz,                 "AEC.keysz -> acceptable key sizes")
 816   GET   (noncesz,               "AEC.noncesz -> acceptable nonce sizes")
 817   GET   (tagsz,                 "AEC.tagsz -> acceptable tag sizes")
 818   GET   (blksz,                 "AEC.blksz -> block size, or zero")
 819   GET   (bufsz,                 "AEC.bufsz -> amount of data buffered internally")
 820   GET   (ohd,                   "AEC.ohd -> maximum encryption overhead")
 821   GET   (name,                  "AEC.name -> name of this kind of AEAD scheme")
 822   GET   (flags,                 "AEC.flags -> mask of `AEADF_...' flags")
 823 #undef GETSETNAME
 824   { 0 }
 825 };
 826
 827 static PyObject *gaekmeth_aad(PyObject *me, PyObject *arg)
 828 {
 829   const gaead_key *k = GAEADKEY_K(me);
 830   PyObject *rc = 0;
 831
 832   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
 833   if (k->ops->c->f&AEADF_AADNDEP)
 834     VALERR("aad must be associated with enc/dec op");
 835   rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(me->ob_type),
 836                        GAEAD_AAD(k), 0, 0);
 837 end:
 838   return (rc);
 839 }
 840
 841 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
 842                              PyObject *hszobj, size_t *hsz_out,
 843                              PyObject *mszobj, size_t *msz_out,
 844                              PyObject *tszobj, size_t *tsz_out)
 845 {
 846   unsigned f = 0, miss;
 847   int rc = -1;
 848
 849   if (hszobj != Py_None)
 850     { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
 851   if (mszobj != Py_None)
 852     { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
 853   if (tszobj != Py_None)
 854     { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
 855   miss = aec->f&~f;
 856   if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
 857   if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
 858   if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
 859   if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
 860   if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
 861     VALERR("bad tag length");
 862   *f_out = f | aec->f; rc = 0;
 863 end:
 864   return (rc);
 865 }
 866
 867 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
 868 {
 869   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
 870   const gaead_key *k = GAEADKEY_K(me);
 871   gaead_enc *e;
 872   PyObject *rc = 0;
 873   char *n; Py_ssize_t nsz;
 874   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
 875   size_t hsz = 0, msz = 0, tsz = 0;
 876   unsigned f;
 877
 878   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
 879                                    &n, &nsz, &hszobj, &mszobj, &tszobj))
 880     goto end;
 881   if (check_aead_encdec(k->ops->c, &f, nsz,
 882                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
 883     goto end;
 884   e = GAEAD_ENC(GAEADKEY_K(me), n, nsz, hsz, msz, tsz);
 885   if (!e) VALERR("bad aead parameter combination");
 886   rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(me->ob_type),
 887                        e, f, hsz, msz, tsz);
 888 end:
 889   return (rc);
 890 }
 891
 892 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
 893 {
 894   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
 895   const gaead_key *k = GAEADKEY_K(me);
 896   gaead_dec *d;
 897   PyObject *rc = 0;
 898   char *n; Py_ssize_t nsz;
 899   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
 900   size_t hsz = 0, csz = 0, tsz = 0;
 901   unsigned f;
 902
 903   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:dec", KWLIST,
 904                                    &n, &nsz, &hszobj, &cszobj, &tszobj))
 905     goto end;
 906   if (check_aead_encdec(k->ops->c, &f, nsz,
 907                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
 908     goto end;
 909   d = GAEAD_DEC(GAEADKEY_K(me), n, nsz, hsz, csz, tsz);
 910   if (!d) VALERR("bad aead parameter combination");
 911   rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(me->ob_type),
 912                        d, f, hsz, csz, tsz);
 913 end:
 914   return (rc);
 915 }
 916
 917 static PyMethodDef gaeadkey_pymethods[] = {
 918 #define METHNAME(name) gaekmeth_##name
 919   METH  (aad,                   "KEY.aad() -> AAD")
 920   KWMETH(enc,                   "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
 921   KWMETH(dec,                   "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
 922 #undef METHNAME
 923   { 0 }
 924 };
 925
 926 PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
 927                           unsigned f, size_t hsz)
 928 {
 929   gaeadaad_pyobj *ga;
 930
 931   assert(cobj); Py_INCREF(cobj);
 932   ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
 933   ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
 934   return ((PyObject *)ga);
 935 }
 936
 937 static void gaeadaad_pydealloc(PyObject *me)
 938 {
 939   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
 940
 941   if (ga->a) GAEAD_DESTROY(ga->a);
 942   Py_DECREF(me->ob_type); FREEOBJ(me);
 943 }
 944
 945 static int gaea_check(PyObject *me)
 946 {
 947   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
 948   int rc = -1;
 949
 950   if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
 951   rc = 0;
 952 end:
 953   return (rc);
 954 }
 955
 956 static void gaea_invalidate(gaeadaad_pyobj *ga)
 957   { if (ga) ga->f |= AEADF_DEAD; }
 958
 959 static void gaea_sever(gaeadaad_pyobj **ga_inout)
 960 {
 961   gaeadaad_pyobj *ga = *ga_inout;
 962   if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
 963 }
 964
 965 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
 966 {
 967   if (gaea_check(me)) return (0);
 968   else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
 969   else RETURN_NONE;
 970 }
 971
 972 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
 973   { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
 974
 975 static PyGetSetDef gaeadaad_pygetset[] = {
 976 #define GETSETNAME(op, name) gaea##op##_##name
 977   GET   (hsz,                   "AAD.hsz -> precommitted header length or `None'")
 978   GET   (hlen,                  "AAD.hlen -> header length so far")
 979 #undef GETSETNAME
 980   { 0 }
 981 };
 982
 983 static PyObject *gaeameth_copy(PyObject *me, PyObject *arg)
 984 {
 985   PyObject *rc = 0;
 986
 987   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
 988   if (gaea_check(me)) goto end;
 989   if (GAEADAAD_F(me)&AEADF_AADNDEP)
 990     VALERR("can't duplicate nonce-dependent aad");
 991   rc = gaeadaad_pywrap((PyObject *)me->ob_type,
 992                        GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
 993 end:
 994   return (rc);
 995 }
 996
 997 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
 998 {
 999   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1000   int rc = -1;
1001
1002   if (gaea_check(me)) goto end;
1003   if ((ga->f&AEADF_NOAAD) && hsz)
1004     VALERR("header data not permitted");
1005   if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1006     VALERR("too large for precommitted header length");
1007   GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1008   rc = 0;
1009 end:
1010   return (rc);
1011 }
1012
1013
1014 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1015 {
1016   char *h; Py_ssize_t hsz;
1017
1018   if (!PyArg_ParseTuple(arg, "s#:hash", &h, &hsz)) return (0);
1019   if (gaeadaad_hash(me, h, hsz)) return (0);
1020   RETURN_ME;
1021 }
1022
1023 #define GAEAMETH_HASHU_(n, W, w)                                        \
1024   static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg)       \
1025   {                                                                     \
1026     uint##n x; octet b[SZ_##W];                                         \
1027     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1028     STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0);    \
1029     RETURN_ME;                                                          \
1030   }
1031 DOUINTCONV(GAEAMETH_HASHU_)
1032
1033 #define GAEAMETH_HASHBUF_(n, W, w)                                      \
1034   static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg)     \
1035   {                                                                     \
1036     char *p; Py_ssize_t sz; octet b[SZ_##W];                            \
1037     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
1038     if (sz > MASK##n) TYERR("string too long");                         \
1039     STORE##W(b, sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end;     \
1040     if (gaeadaad_hash(me, p, sz)) goto end;                             \
1041     RETURN_ME;                                                          \
1042   end:                                                                  \
1043     return (0);                                                         \
1044   }
1045 DOUINTCONV(GAEAMETH_HASHBUF_)
1046
1047 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1048 {
1049   char *p;
1050   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1051   if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1052   RETURN_ME;
1053 }
1054
1055 static PyMethodDef gaeadaad_pymethods[] = {
1056 #define METHNAME(name) gaeameth_##name
1057   METH  (copy,                  "AAD.copy() -> AAD'")
1058   METH  (hash,                  "AAD.hash(H)")
1059 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1060   DOUINTCONV(METHU_)
1061 #undef METHU_
1062 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1063   DOUINTCONV(METHBUF_)
1064 #undef METHBUF_
1065   METH  (hashstrz,              "AAD.hashstrz(STRING)")
1066 #undef METHNAME
1067   { 0 }
1068 };
1069
1070 PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1071                           size_t hsz, size_t msz, size_t tsz)
1072 {
1073   gaeadenc_pyobj *ge;
1074
1075   assert(cobj); Py_INCREF(cobj);
1076   ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1077   ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1078   ge->aad = 0; ge->mlen = 0;
1079   return ((PyObject *)ge);
1080 }
1081
1082 static void gaeadenc_pydealloc(PyObject *me)
1083 {
1084   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1085
1086   gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1087   Py_DECREF(me->ob_type); FREEOBJ(me);
1088 }
1089
1090 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1091 {
1092   if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1093   else RETURN_NONE;
1094 }
1095
1096 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1097 {
1098   if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1099   else RETURN_NONE;
1100 }
1101
1102 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1103 {
1104   if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1105   else RETURN_NONE;
1106 }
1107
1108 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1109   { return getulong(GAEADENC_MLEN(me)); }
1110
1111 static PyGetSetDef gaeadenc_pygetset[] = {
1112 #define GETSETNAME(op, name) gaee##op##_##name
1113   GET   (hsz,                   "ENC.hsz -> precommitted header length or `None'")
1114   GET   (msz,                   "ENC.msz -> precommitted message length or `None'")
1115   GET   (tsz,                   "ENC.tsz -> precommitted tag length or `None'")
1116   GET   (mlen,                  "ENC.mlen -> message length so far")
1117 #undef GETSETNAME
1118   { 0 }
1119 };
1120
1121 static PyObject *gaeemeth_aad(PyObject *me, PyObject *arg)
1122 {
1123   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1124   PyObject *rc = 0;
1125
1126   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1127   if (!(ge->f&AEADF_AADNDEP))
1128     rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1129                          GAEAD_AAD(ge->e), 0, 0);
1130   else {
1131     if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1132       VALERR("too late for aad");
1133     if (!ge->aad)
1134       ge->aad = (gaeadaad_pyobj *)
1135         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1136                         GAEAD_AAD(ge->e), ge->f&AEADF_PCHSZ, ge->hsz);
1137     Py_INCREF(ge->aad);
1138     rc = (PyObject *)ge->aad;
1139   }
1140 end:
1141   return (rc);
1142 }
1143
1144 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1145 {
1146   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1147   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1148   char *n; Py_ssize_t nsz;
1149   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1150   size_t hsz = 0, msz = 0, tsz = 0;
1151   unsigned f;
1152
1153   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1154                                    &n, &nsz, &hszobj, &mszobj, &tszobj))
1155     goto end;
1156   if (check_aead_encdec(ge->e->ops->c, &f, nsz,
1157                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1158     goto end;
1159   if (GAEAD_REINIT(ge->e, n, nsz, hsz, msz, tsz))
1160     VALERR("bad aead parameter combination");
1161   gaea_sever(&ge->aad);
1162   ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1163 end:
1164   return (0);
1165 }
1166
1167 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1168 {
1169   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1170   char *m; Py_ssize_t msz;
1171   char *c = 0; size_t csz; buf b;
1172   int err;
1173   PyObject *rc = 0;
1174
1175   if (!PyArg_ParseTuple(arg, "s#:encrypt", &m, &msz)) goto end;
1176   if (ge->f&AEADF_AADFIRST) {
1177     if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1178       VALERR("header doesn't match precommitted length");
1179     gaea_invalidate(ge->aad);
1180   }
1181   if ((ge->f&AEADF_PCMSZ) && msz > ge->msz - ge->mlen)
1182     VALERR("too large for precommitted message length");
1183   csz = msz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1184   err = GAEAD_ENCRYPT(ge->e, m, msz, &b); assert(!err); (void)err;
1185   buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += msz;
1186 end:
1187   xfree(c);
1188   return (rc);
1189 }
1190
1191 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1192 {
1193   static const char *const kwlist[] = { "tsz", "aad", 0 };
1194   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1195   PyObject *aad = Py_None;
1196   char *c = 0; size_t csz; buf b;
1197   PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1198   int err;
1199   PyObject *rc = 0;
1200
1201   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1202                                    &tszobj, &aad))
1203     goto end;
1204   if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1205   if (aad != Py_None &&
1206       !PyObject_TypeCheck(aad,
1207                           (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1208     TYERR("wanted aad");
1209   if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1210     VALERR("mismatched aad");
1211   if ((ge->f&AEADF_PCHSZ) &&
1212       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1213     VALERR("header doesn't match precommitted length");
1214   if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1215     VALERR("message doesn't match precommitted length");
1216   if (tszobj == Py_None) {
1217     if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1218     else tsz = keysz(0, ge->e->ops->c->tagsz);
1219   } else {
1220     if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1221       VALERR("tag length doesn't match precommitted value");
1222     if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1223   }
1224   csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1225   tag = bytestring_pywrap(0, tsz);
1226   err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1227                    PyString_AS_STRING(tag), tsz);
1228   assert(!err); (void)err;
1229   buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1230 end:
1231   xfree(c);
1232   return (rc);
1233 }
1234
1235 static PyMethodDef gaeadenc_pymethods[] = {
1236 #define METHNAME(name) gaeemeth_##name
1237   METH  (aad,                   "ENC.aad() -> AAD")
1238   KWMETH(reinit,                "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1239   METH  (encrypt,               "ENC.encrypt(MSG) -> CT")
1240   KWMETH(done,                  "ENC.done([tsz], [aad]) -> CT, TAG")
1241 #undef METHNAME
1242   { 0 }
1243 };
1244
1245 PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1246                           size_t hsz, size_t csz, size_t tsz)
1247 {
1248   gaeaddec_pyobj *gd;
1249   assert(cobj); Py_INCREF(cobj);
1250   gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1251   gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1252   gd->aad = 0; gd->clen = 0;
1253   return ((PyObject *)gd);
1254 }
1255
1256 static void gaeaddec_pydealloc(PyObject *me)
1257 {
1258   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1259
1260   gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1261   Py_DECREF(me->ob_type); FREEOBJ(me);
1262 }
1263
1264 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1265 {
1266   if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1267   else RETURN_NONE;
1268 }
1269
1270 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1271 {
1272   if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1273   else RETURN_NONE;
1274 }
1275
1276 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1277 {
1278   if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1279   else RETURN_NONE;
1280 }
1281
1282 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1283   { return getulong(GAEADDEC_CLEN(me)); }
1284
1285 static PyGetSetDef gaeaddec_pygetset[] = {
1286 #define GETSETNAME(op, name) gaed##op##_##name
1287   GET   (hsz,                   "DEC.hsz -> precommitted header length or `None'")
1288   GET   (csz,                   "DEC.csz -> precommitted ciphertext length or `None'")
1289   GET   (tsz,                   "DEC.tsz -> precommitted tag length or `None'")
1290   GET   (clen,                  "DEC.clen -> ciphertext length so far")
1291 #undef GETSETNAME
1292   { 0 }
1293 };
1294
1295 static PyObject *gaedmeth_aad(PyObject *me, PyObject *arg)
1296 {
1297   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1298
1299   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1300   if (!(gd->f&AEADF_AADNDEP))
1301     return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(gd->ob_type)->aad,
1302                             GAEAD_AAD(gd->d), 0, 0));
1303   else {
1304     if (!gd->aad)
1305       gd->aad = (gaeadaad_pyobj *)
1306         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(gd->ob_type)->aad,
1307                         GAEAD_AAD(gd->d), gd->f&AEADF_PCHSZ, gd->hsz);
1308     Py_INCREF(gd->aad);
1309     return ((PyObject *)gd->aad);
1310   }
1311 }
1312
1313 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1314 {
1315   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1316   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1317   char *n; Py_ssize_t nsz;
1318   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1319   size_t hsz = 0, csz = 0, tsz = 0;
1320   unsigned f;
1321
1322   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1323                                    &n, &nsz, &hszobj, &cszobj, &tszobj))
1324     goto end;
1325   if (check_aead_encdec(gd->d->ops->c, &f, nsz,
1326                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1327     goto end;
1328   if (GAEAD_REINIT(gd->d, n, nsz, hsz, csz, tsz))
1329     VALERR("bad aead parameter combination");
1330   gaea_sever(&gd->aad);
1331   gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1332 end:
1333   return (0);
1334 }
1335
1336 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1337 {
1338   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1339   char *c; Py_ssize_t csz;
1340   char *m = 0; size_t msz; buf b;
1341   int err;
1342   PyObject *rc = 0;
1343
1344   if (!PyArg_ParseTuple(arg, "s#:decrypt", &c, &csz)) goto end;
1345   if (gd->f&AEADF_AADFIRST) {
1346     if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1347       VALERR("header doesn't match precommitted length");
1348     gaea_invalidate(gd->aad);
1349   }
1350   if ((gd->f&AEADF_PCMSZ) && csz > gd->csz - gd->clen)
1351     VALERR("too large for precommitted message length");
1352   msz = csz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1353   err = GAEAD_DECRYPT(gd->d, c, csz, &b); assert(!err); (void)err;
1354   buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += csz;
1355 end:
1356   xfree(m);
1357   return (rc);
1358 }
1359
1360 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1361 {
1362   static const char *const kwlist[] = { "tag", "aad", 0 };
1363   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1364   PyObject *aad = Py_None;
1365   char *t; Py_ssize_t tsz;
1366   char *m = 0; size_t msz; buf b;
1367   int err;
1368   PyObject *rc = 0;
1369
1370   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O:done", KWLIST,
1371                                    &t, &tsz, &aad))
1372     goto end;
1373   if (aad != Py_None &&
1374       !PyObject_TypeCheck(aad,
1375                           (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1376     TYERR("wanted aad");
1377   if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1378     VALERR("mismatched aad");
1379   if ((gd->f&AEADF_PCHSZ) &&
1380       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1381     VALERR("header doesn't match precommitted length");
1382   if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1383     VALERR("message doesn't match precommitted length");
1384   if ((gd->f&AEADF_PCTSZ) && tsz != gd->tsz)
1385     VALERR("tag length doesn't match precommitted value");
1386   if (keysz(tsz, gd->d->ops->c->tagsz) != tsz) VALERR("bad tag length");
1387   msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1388   err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad), &b, t, tsz);
1389   assert(err >= 0);
1390   if (!err) VALERR("decryption failed");
1391   buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1392 end:
1393   xfree(m);
1394   return (rc);
1395 }
1396
1397 static PyMethodDef gaeaddec_pymethods[] = {
1398 #define METHNAME(name) gaedmeth_##name
1399   METH  (aad,                   "DEC.aad() -> AAD")
1400   KWMETH(reinit,                "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1401   METH  (decrypt,               "DEC.decrypt(CT) -> MSG")
1402   KWMETH(done,                  "DEC.done(TAG, [aad]) -> MSG | None")
1403 #undef METHNAME
1404   { 0 }
1405 };
1406
1407 static PyTypeObject gcaead_pytype_skel = {
1408   PyObject_HEAD_INIT(0) 0,              /* Header */
1409   "GCAEAD",                             /* @tp_name@ */
1410   sizeof(gcaead_pyobj),                 /* @tp_basicsize@ */
1411   0,                                    /* @tp_itemsize@ */
1412
1413   0,                                    /* @tp_dealloc@ */
1414   0,                                    /* @tp_print@ */
1415   0,                                    /* @tp_getattr@ */
1416   0,                                    /* @tp_setattr@ */
1417   0,                                    /* @tp_compare@ */
1418   0,                                    /* @tp_repr@ */
1419   0,                                    /* @tp_as_number@ */
1420   0,                                    /* @tp_as_sequence@ */
1421   0,                                    /* @tp_as_mapping@ */
1422   0,                                    /* @tp_hash@ */
1423   0,                                    /* @tp_call@ */
1424   0,                                    /* @tp_str@ */
1425   0,                                    /* @tp_getattro@ */
1426   0,                                    /* @tp_setattro@ */
1427   0,                                    /* @tp_as_buffer@ */
1428   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1429     Py_TPFLAGS_BASETYPE,
1430
1431   /* @tp_doc@ */
1432 "Authenticated encryption (key) metaclass.",
1433
1434   0,                                    /* @tp_traverse@ */
1435   0,                                    /* @tp_clear@ */
1436   0,                                    /* @tp_richcompare@ */
1437   0,                                    /* @tp_weaklistoffset@ */
1438   0,                                    /* @tp_iter@ */
1439   0,                                    /* @tp_iternext@ */
1440   0,                                    /* @tp_methods@ */
1441   0,                                    /* @tp_members@ */
1442   gcaead_pygetset,                      /* @tp_getset@ */
1443   0,                                    /* @tp_base@ */
1444   0,                                    /* @tp_dict@ */
1445   0,                                    /* @tp_descr_get@ */
1446   0,                                    /* @tp_descr_set@ */
1447   0,                                    /* @tp_dictoffset@ */
1448   0,                                    /* @tp_init@ */
1449   PyType_GenericAlloc,                  /* @tp_alloc@ */
1450   abstract_pynew,                       /* @tp_new@ */
1451   0,                                    /* @tp_free@ */
1452   0                                     /* @tp_is_gc@ */
1453 };
1454
1455 static PyTypeObject gaeadkey_pytype_skel = {
1456   PyObject_HEAD_INIT(0) 0,              /* Header */
1457   "GAEKey",                             /* @tp_name@ */
1458   sizeof(gaeadkey_pyobj),               /* @tp_basicsize@ */
1459   0,                                    /* @tp_itemsize@ */
1460
1461   gaeadkey_pydealloc,                   /* @tp_dealloc@ */
1462   0,                                    /* @tp_print@ */
1463   0,                                    /* @tp_getattr@ */
1464   0,                                    /* @tp_setattr@ */
1465   0,                                    /* @tp_compare@ */
1466   0,                                    /* @tp_repr@ */
1467   0,                                    /* @tp_as_number@ */
1468   0,                                    /* @tp_as_sequence@ */
1469   0,                                    /* @tp_as_mapping@ */
1470   0,                                    /* @tp_hash@ */
1471   0,                                    /* @tp_call@ */
1472   0,                                    /* @tp_str@ */
1473   0,                                    /* @tp_getattro@ */
1474   0,                                    /* @tp_setattro@ */
1475   0,                                    /* @tp_as_buffer@ */
1476   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1477     Py_TPFLAGS_BASETYPE,
1478
1479   /* @tp_doc@ */
1480 "Authenticated encryption key.",
1481
1482   0,                                    /* @tp_traverse@ */
1483   0,                                    /* @tp_clear@ */
1484   0,                                    /* @tp_richcompare@ */
1485   0,                                    /* @tp_weaklistoffset@ */
1486   0,                                    /* @tp_iter@ */
1487   0,                                    /* @tp_iternext@ */
1488   gaeadkey_pymethods,                   /* @tp_methods@ */
1489   0,                                    /* @tp_members@ */
1490   0,                                    /* @tp_getset@ */
1491   0,                                    /* @tp_base@ */
1492   0,                                    /* @tp_dict@ */
1493   0,                                    /* @tp_descr_get@ */
1494   0,                                    /* @tp_descr_set@ */
1495   0,                                    /* @tp_dictoffset@ */
1496   0,                                    /* @tp_init@ */
1497   PyType_GenericAlloc,                  /* @tp_alloc@ */
1498   abstract_pynew,                       /* @tp_new@ */
1499   0,                                    /* @tp_free@ */
1500   0                                     /* @tp_is_gc@ */
1501 };
1502
1503 static PyTypeObject gcaeadaad_pytype_skel = {
1504   PyObject_HEAD_INIT(0) 0,              /* Header */
1505   "GAEAADClass",                        /* @tp_name@ */
1506   sizeof(gcaeadaad_pyobj),              /* @tp_basicsize@ */
1507   0,                                    /* @tp_itemsize@ */
1508
1509   0,                                    /* @tp_dealloc@ */
1510   0,                                    /* @tp_print@ */
1511   0,                                    /* @tp_getattr@ */
1512   0,                                    /* @tp_setattr@ */
1513   0,                                    /* @tp_compare@ */
1514   0,                                    /* @tp_repr@ */
1515   0,                                    /* @tp_as_number@ */
1516   0,                                    /* @tp_as_sequence@ */
1517   0,                                    /* @tp_as_mapping@ */
1518   0,                                    /* @tp_hash@ */
1519   0,                                    /* @tp_call@ */
1520   0,                                    /* @tp_str@ */
1521   0,                                    /* @tp_getattro@ */
1522   0,                                    /* @tp_setattro@ */
1523   0,                                    /* @tp_as_buffer@ */
1524   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1525     Py_TPFLAGS_BASETYPE,
1526
1527   /* @tp_doc@ */
1528 "Authenticated encryption additional-data hash metaclass.",
1529
1530   0,                                    /* @tp_traverse@ */
1531   0,                                    /* @tp_clear@ */
1532   0,                                    /* @tp_richcompare@ */
1533   0,                                    /* @tp_weaklistoffset@ */
1534   0,                                    /* @tp_iter@ */
1535   0,                                    /* @tp_iternext@ */
1536   0,                                    /* @tp_methods@ */
1537   0,                                    /* @tp_members@ */
1538   0,                                    /* @tp_getset@ */
1539   0,                                    /* @tp_base@ */
1540   0,                                    /* @tp_dict@ */
1541   0,                                    /* @tp_descr_get@ */
1542   0,                                    /* @tp_descr_set@ */
1543   0,                                    /* @tp_dictoffset@ */
1544   0,                                    /* @tp_init@ */
1545   PyType_GenericAlloc,                  /* @tp_alloc@ */
1546   abstract_pynew,                       /* @tp_new@ */
1547   0,                                    /* @tp_free@ */
1548   0                                     /* @tp_is_gc@ */
1549 };
1550
1551 static PyTypeObject gaeadaad_pytype_skel = {
1552   PyObject_HEAD_INIT(0) 0,              /* Header */
1553   "GAEAAD",                             /* @tp_name@ */
1554   sizeof(gaeadaad_pyobj),               /* @tp_basicsize@ */
1555   0,                                    /* @tp_itemsize@ */
1556
1557   gaeadaad_pydealloc,                   /* @tp_dealloc@ */
1558   0,                                    /* @tp_print@ */
1559   0,                                    /* @tp_getattr@ */
1560   0,                                    /* @tp_setattr@ */
1561   0,                                    /* @tp_compare@ */
1562   0,                                    /* @tp_repr@ */
1563   0,                                    /* @tp_as_number@ */
1564   0,                                    /* @tp_as_sequence@ */
1565   0,                                    /* @tp_as_mapping@ */
1566   0,                                    /* @tp_hash@ */
1567   0,                                    /* @tp_call@ */
1568   0,                                    /* @tp_str@ */
1569   0,                                    /* @tp_getattro@ */
1570   0,                                    /* @tp_setattro@ */
1571   0,                                    /* @tp_as_buffer@ */
1572   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1573     Py_TPFLAGS_BASETYPE,
1574
1575   /* @tp_doc@ */
1576 "Authenticated encryption AAD hash.",
1577
1578   0,                                    /* @tp_traverse@ */
1579   0,                                    /* @tp_clear@ */
1580   0,                                    /* @tp_richcompare@ */
1581   0,                                    /* @tp_weaklistoffset@ */
1582   0,                                    /* @tp_iter@ */
1583   0,                                    /* @tp_iternext@ */
1584   gaeadaad_pymethods,                   /* @tp_methods@ */
1585   0,                                    /* @tp_members@ */
1586   gaeadaad_pygetset,                    /* @tp_getset@ */
1587   0,                                    /* @tp_base@ */
1588   0,                                    /* @tp_dict@ */
1589   0,                                    /* @tp_descr_get@ */
1590   0,                                    /* @tp_descr_set@ */
1591   0,                                    /* @tp_dictoffset@ */
1592   0,                                    /* @tp_init@ */
1593   PyType_GenericAlloc,                  /* @tp_alloc@ */
1594   abstract_pynew,                       /* @tp_new@ */
1595   0,                                    /* @tp_free@ */
1596   0                                     /* @tp_is_gc@ */
1597 };
1598
1599 static PyTypeObject gcaeadenc_pytype_skel = {
1600   PyObject_HEAD_INIT(0) 0,              /* Header */
1601   "GAEEncClass",                        /* @tp_name@ */
1602   sizeof(gcaeadenc_pyobj),              /* @tp_basicsize@ */
1603   0,                                    /* @tp_itemsize@ */
1604
1605   0,                                    /* @tp_dealloc@ */
1606   0,                                    /* @tp_print@ */
1607   0,                                    /* @tp_getattr@ */
1608   0,                                    /* @tp_setattr@ */
1609   0,                                    /* @tp_compare@ */
1610   0,                                    /* @tp_repr@ */
1611   0,                                    /* @tp_as_number@ */
1612   0,                                    /* @tp_as_sequence@ */
1613   0,                                    /* @tp_as_mapping@ */
1614   0,                                    /* @tp_hash@ */
1615   0,                                    /* @tp_call@ */
1616   0,                                    /* @tp_str@ */
1617   0,                                    /* @tp_getattro@ */
1618   0,                                    /* @tp_setattro@ */
1619   0,                                    /* @tp_as_buffer@ */
1620   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1621     Py_TPFLAGS_BASETYPE,
1622
1623   /* @tp_doc@ */
1624 "Authenticated encryption operation metaclass.",
1625
1626   0,                                    /* @tp_traverse@ */
1627   0,                                    /* @tp_clear@ */
1628   0,                                    /* @tp_richcompare@ */
1629   0,                                    /* @tp_weaklistoffset@ */
1630   0,                                    /* @tp_iter@ */
1631   0,                                    /* @tp_iternext@ */
1632   0,                                    /* @tp_methods@ */
1633   0,                                    /* @tp_members@ */
1634   0,                                    /* @tp_getset@ */
1635   0,                                    /* @tp_base@ */
1636   0,                                    /* @tp_dict@ */
1637   0,                                    /* @tp_descr_get@ */
1638   0,                                    /* @tp_descr_set@ */
1639   0,                                    /* @tp_dictoffset@ */
1640   0,                                    /* @tp_init@ */
1641   PyType_GenericAlloc,                  /* @tp_alloc@ */
1642   abstract_pynew,                       /* @tp_new@ */
1643   0,                                    /* @tp_free@ */
1644   0                                     /* @tp_is_gc@ */
1645 };
1646
1647 static PyTypeObject gaeadenc_pytype_skel = {
1648   PyObject_HEAD_INIT(0) 0,              /* Header */
1649   "GAEEnc",                             /* @tp_name@ */
1650   sizeof(gaeadenc_pyobj),               /* @tp_basicsize@ */
1651   0,                                    /* @tp_itemsize@ */
1652
1653   gaeadenc_pydealloc,                   /* @tp_dealloc@ */
1654   0,                                    /* @tp_print@ */
1655   0,                                    /* @tp_getattr@ */
1656   0,                                    /* @tp_setattr@ */
1657   0,                                    /* @tp_compare@ */
1658   0,                                    /* @tp_repr@ */
1659   0,                                    /* @tp_as_number@ */
1660   0,                                    /* @tp_as_sequence@ */
1661   0,                                    /* @tp_as_mapping@ */
1662   0,                                    /* @tp_hash@ */
1663   0,                                    /* @tp_call@ */
1664   0,                                    /* @tp_str@ */
1665   0,                                    /* @tp_getattro@ */
1666   0,                                    /* @tp_setattro@ */
1667   0,                                    /* @tp_as_buffer@ */
1668   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1669     Py_TPFLAGS_BASETYPE,
1670
1671   /* @tp_doc@ */
1672 "Authenticated encryption operation.",
1673
1674   0,                                    /* @tp_traverse@ */
1675   0,                                    /* @tp_clear@ */
1676   0,                                    /* @tp_richcompare@ */
1677   0,                                    /* @tp_weaklistoffset@ */
1678   0,                                    /* @tp_iter@ */
1679   0,                                    /* @tp_iternext@ */
1680   gaeadenc_pymethods,                   /* @tp_methods@ */
1681   0,                                    /* @tp_members@ */
1682   gaeadenc_pygetset,                    /* @tp_getset@ */
1683   0,                                    /* @tp_base@ */
1684   0,                                    /* @tp_dict@ */
1685   0,                                    /* @tp_descr_get@ */
1686   0,                                    /* @tp_descr_set@ */
1687   0,                                    /* @tp_dictoffset@ */
1688   0,                                    /* @tp_init@ */
1689   PyType_GenericAlloc,                  /* @tp_alloc@ */
1690   abstract_pynew,                       /* @tp_new@ */
1691   0,                                    /* @tp_free@ */
1692   0                                     /* @tp_is_gc@ */
1693 };
1694
1695 static PyTypeObject gcaeaddec_pytype_skel = {
1696   PyObject_HEAD_INIT(0) 0,              /* Header */
1697   "GAEDecClass",                        /* @tp_name@ */
1698   sizeof(gcaeaddec_pyobj),              /* @tp_basicsize@ */
1699   0,                                    /* @tp_itemsize@ */
1700
1701   0,                                    /* @tp_dealloc@ */
1702   0,                                    /* @tp_print@ */
1703   0,                                    /* @tp_getattr@ */
1704   0,                                    /* @tp_setattr@ */
1705   0,                                    /* @tp_compare@ */
1706   0,                                    /* @tp_repr@ */
1707   0,                                    /* @tp_as_number@ */
1708   0,                                    /* @tp_as_sequence@ */
1709   0,                                    /* @tp_as_mapping@ */
1710   0,                                    /* @tp_hash@ */
1711   0,                                    /* @tp_call@ */
1712   0,                                    /* @tp_str@ */
1713   0,                                    /* @tp_getattro@ */
1714   0,                                    /* @tp_setattro@ */
1715   0,                                    /* @tp_as_buffer@ */
1716   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1717     Py_TPFLAGS_BASETYPE,
1718
1719   /* @tp_doc@ */
1720 "Authenticated decryption operation metaclass.",
1721
1722   0,                                    /* @tp_traverse@ */
1723   0,                                    /* @tp_clear@ */
1724   0,                                    /* @tp_richcompare@ */
1725   0,                                    /* @tp_weaklistoffset@ */
1726   0,                                    /* @tp_iter@ */
1727   0,                                    /* @tp_iternext@ */
1728   0,                                    /* @tp_methods@ */
1729   0,                                    /* @tp_members@ */
1730   0,                                    /* @tp_getset@ */
1731   0,                                    /* @tp_base@ */
1732   0,                                    /* @tp_dict@ */
1733   0,                                    /* @tp_descr_get@ */
1734   0,                                    /* @tp_descr_set@ */
1735   0,                                    /* @tp_dictoffset@ */
1736   0,                                    /* @tp_init@ */
1737   PyType_GenericAlloc,                  /* @tp_alloc@ */
1738   abstract_pynew,                       /* @tp_new@ */
1739   0,                                    /* @tp_free@ */
1740   0                                     /* @tp_is_gc@ */
1741 };
1742
1743 static PyTypeObject gaeaddec_pytype_skel = {
1744   PyObject_HEAD_INIT(0) 0,              /* Header */
1745   "GAEDec",                             /* @tp_name@ */
1746   sizeof(gaeaddec_pyobj),               /* @tp_basicsize@ */
1747   0,                                    /* @tp_itemsize@ */
1748
1749   gaeaddec_pydealloc,                   /* @tp_dealloc@ */
1750   0,                                    /* @tp_print@ */
1751   0,                                    /* @tp_getattr@ */
1752   0,                                    /* @tp_setattr@ */
1753   0,                                    /* @tp_compare@ */
1754   0,                                    /* @tp_repr@ */
1755   0,                                    /* @tp_as_number@ */
1756   0,                                    /* @tp_as_sequence@ */
1757   0,                                    /* @tp_as_mapping@ */
1758   0,                                    /* @tp_hash@ */
1759   0,                                    /* @tp_call@ */
1760   0,                                    /* @tp_str@ */
1761   0,                                    /* @tp_getattro@ */
1762   0,                                    /* @tp_setattro@ */
1763   0,                                    /* @tp_as_buffer@ */
1764   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1765     Py_TPFLAGS_BASETYPE,
1766
1767   /* @tp_doc@ */
1768 "Authenticated decryption operation.",
1769
1770   0,                                    /* @tp_traverse@ */
1771   0,                                    /* @tp_clear@ */
1772   0,                                    /* @tp_richcompare@ */
1773   0,                                    /* @tp_weaklistoffset@ */
1774   0,                                    /* @tp_iter@ */
1775   0,                                    /* @tp_iternext@ */
1776   gaeaddec_pymethods,                   /* @tp_methods@ */
1777   0,                                    /* @tp_members@ */
1778   gaeaddec_pygetset,                    /* @tp_getset@ */
1779   0,                                    /* @tp_base@ */
1780   0,                                    /* @tp_dict@ */
1781   0,                                    /* @tp_descr_get@ */
1782   0,                                    /* @tp_descr_set@ */
1783   0,                                    /* @tp_dictoffset@ */
1784   0,                                    /* @tp_init@ */
1785   PyType_GenericAlloc,                  /* @tp_alloc@ */
1786   abstract_pynew,                       /* @tp_new@ */
1787   0,                                    /* @tp_free@ */
1788   0                                     /* @tp_is_gc@ */
1789 };
1790
1791 /*----- Hash functions ----------------------------------------------------*/
1792
1793 PyTypeObject *gchash_pytype, *ghash_pytype;
1794
1795 CONVFUNC(gchash, gchash *, GCHASH_CH)
1796 CONVFUNC(ghash, ghash *, GHASH_H)
1797
1798 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1799 {
1800   static const char *const kwlist[] = { 0 };
1801   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1802     goto end;
1803   return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1804 end:
1805   return (0);
1806 }
1807
1808 PyObject *gchash_pywrap(gchash *ch)
1809 {
1810   gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1811   g->ch = ch;
1812   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1813   g->ty.ht_type.tp_base = ghash_pytype;
1814   Py_INCREF(ghash_pytype);
1815   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1816                             Py_TPFLAGS_BASETYPE |
1817                             Py_TPFLAGS_HEAPTYPE);
1818   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1819   g->ty.ht_type.tp_free = 0;
1820   g->ty.ht_type.tp_new = ghash_pynew;
1821   typeready(&g->ty.ht_type);
1822   return ((PyObject *)g);
1823 }
1824
1825 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1826 {
1827   ghash_pyobj *g;
1828   if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1829   else Py_INCREF(cobj);
1830   g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1831   g->h = h;
1832   return ((PyObject *)g);
1833 }
1834
1835 static void ghash_pydealloc(PyObject *me)
1836 {
1837   GH_DESTROY(GHASH_H(me));
1838   Py_DECREF(me->ob_type);
1839   FREEOBJ(me);
1840 }
1841
1842 static PyObject *gchget_name(PyObject *me, void *hunoz)
1843   { return (PyString_FromString(GCHASH_CH(me)->name)); }
1844
1845 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
1846   { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
1847
1848 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
1849   { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
1850
1851 static PyObject *ghmeth_copy(PyObject *me, PyObject *arg)
1852 {
1853   if (!PyArg_ParseTuple(arg, ":copy")) return (0);
1854   return (ghash_pywrap((PyObject *)me->ob_type, GH_COPY(GHASH_H(me))));
1855 }
1856
1857 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
1858 {
1859   char *p;
1860   Py_ssize_t sz;
1861   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
1862   GH_HASH(GHASH_H(me), p, sz);
1863   RETURN_ME;
1864 }
1865
1866 #define GHMETH_HASHU_(n, W, w)                                          \
1867   static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg)         \
1868   {                                                                     \
1869     uint##n x;                                                          \
1870     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1871     GH_HASHU##W(GHASH_H(me), x);                                        \
1872     RETURN_ME;                                                          \
1873   }
1874 DOUINTCONV(GHMETH_HASHU_)
1875
1876 #define GHMETH_HASHBUF_(n, W, w)                                        \
1877   static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg)       \
1878   {                                                                     \
1879     char *p;                                                            \
1880     Py_ssize_t sz;                                                      \
1881     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
1882     if (sz > MASK##n) TYERR("string too long");                         \
1883     GH_HASHBUF##W(GHASH_H(me), p, sz);                                  \
1884     RETURN_ME;                                                          \
1885   end:                                                                  \
1886     return (0);                                                         \
1887   }
1888 DOUINTCONV(GHMETH_HASHBUF_)
1889
1890 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
1891 {
1892   char *p;
1893   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1894   GH_HASHSTRZ(GHASH_H(me), p);
1895   RETURN_ME;
1896 }
1897
1898 static PyObject *ghmeth_done(PyObject *me, PyObject *arg)
1899 {
1900   ghash *g;
1901   PyObject *rc;
1902   if (!PyArg_ParseTuple(arg, ":done")) return (0);
1903   g = GH_COPY(GHASH_H(me));
1904   rc = bytestring_pywrap(0, g->ops->c->hashsz);
1905   GH_DONE(g, PyString_AS_STRING(rc));
1906   GH_DESTROY(g);
1907   return (rc);
1908 }
1909
1910 static PyGetSetDef gchash_pygetset[] = {
1911 #define GETSETNAME(op, name) gch##op##_##name
1912   GET   (bufsz,                 "CH.bufsz -> hash buffer size, or zero")
1913   GET   (hashsz,                "CH.hashsz -> hash output size")
1914   GET   (name,                  "CH.name -> name of this kind of hash")
1915 #undef GETSETNAME
1916   { 0 }
1917 };
1918
1919 static PyMethodDef ghash_pymethods[] = {
1920 #define METHNAME(name) ghmeth_##name
1921   METH  (copy,                  "H.copy() -> HH")
1922   METH  (hash,                  "H.hash(M)")
1923 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
1924   DOUINTCONV(METHU_)
1925 #undef METHU_
1926 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
1927   DOUINTCONV(METHBUF_)
1928 #undef METHBUF_
1929   METH  (hashstrz,              "H.hashstrz(STRING)")
1930   METH  (done,                  "H.done() -> HASH")
1931 #undef METHNAME
1932   { 0 }
1933 };
1934
1935 static PyTypeObject gchash_pytype_skel = {
1936   PyObject_HEAD_INIT(0) 0,              /* Header */
1937   "GCHash",                             /* @tp_name@ */
1938   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
1939   0,                                    /* @tp_itemsize@ */
1940
1941   0,                                    /* @tp_dealloc@ */
1942   0,                                    /* @tp_print@ */
1943   0,                                    /* @tp_getattr@ */
1944   0,                                    /* @tp_setattr@ */
1945   0,                                    /* @tp_compare@ */
1946   0,                                    /* @tp_repr@ */
1947   0,                                    /* @tp_as_number@ */
1948   0,                                    /* @tp_as_sequence@ */
1949   0,                                    /* @tp_as_mapping@ */
1950   0,                                    /* @tp_hash@ */
1951   0,                                    /* @tp_call@ */
1952   0,                                    /* @tp_str@ */
1953   0,                                    /* @tp_getattro@ */
1954   0,                                    /* @tp_setattro@ */
1955   0,                                    /* @tp_as_buffer@ */
1956   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1957     Py_TPFLAGS_BASETYPE,
1958
1959   /* @tp_doc@ */
1960 "Hash function metaclass.",
1961
1962   0,                                    /* @tp_traverse@ */
1963   0,                                    /* @tp_clear@ */
1964   0,                                    /* @tp_richcompare@ */
1965   0,                                    /* @tp_weaklistoffset@ */
1966   0,                                    /* @tp_iter@ */
1967   0,                                    /* @tp_iternext@ */
1968   0,                                    /* @tp_methods@ */
1969   0,                                    /* @tp_members@ */
1970   gchash_pygetset,                      /* @tp_getset@ */
1971   0,                                    /* @tp_base@ */
1972   0,                                    /* @tp_dict@ */
1973   0,                                    /* @tp_descr_get@ */
1974   0,                                    /* @tp_descr_set@ */
1975   0,                                    /* @tp_dictoffset@ */
1976   0,                                    /* @tp_init@ */
1977   PyType_GenericAlloc,                  /* @tp_alloc@ */
1978   abstract_pynew,                       /* @tp_new@ */
1979   0,                                    /* @tp_free@ */
1980   0                                     /* @tp_is_gc@ */
1981 };
1982
1983 static PyTypeObject ghash_pytype_skel = {
1984   PyObject_HEAD_INIT(0) 0,              /* Header */
1985   "GHash",                              /* @tp_name@ */
1986   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
1987   0,                                    /* @tp_itemsize@ */
1988
1989   ghash_pydealloc,                      /* @tp_dealloc@ */
1990   0,                                    /* @tp_print@ */
1991   0,                                    /* @tp_getattr@ */
1992   0,                                    /* @tp_setattr@ */
1993   0,                                    /* @tp_compare@ */
1994   0,                                    /* @tp_repr@ */
1995   0,                                    /* @tp_as_number@ */
1996   0,                                    /* @tp_as_sequence@ */
1997   0,                                    /* @tp_as_mapping@ */
1998   0,                                    /* @tp_hash@ */
1999   0,                                    /* @tp_call@ */
2000   0,                                    /* @tp_str@ */
2001   0,                                    /* @tp_getattro@ */
2002   0,                                    /* @tp_setattro@ */
2003   0,                                    /* @tp_as_buffer@ */
2004   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2005     Py_TPFLAGS_BASETYPE,
2006
2007   /* @tp_doc@ */
2008 "Hash function, abstract base class.",
2009
2010   0,                                    /* @tp_traverse@ */
2011   0,                                    /* @tp_clear@ */
2012   0,                                    /* @tp_richcompare@ */
2013   0,                                    /* @tp_weaklistoffset@ */
2014   0,                                    /* @tp_iter@ */
2015   0,                                    /* @tp_iternext@ */
2016   ghash_pymethods,                      /* @tp_methods@ */
2017   0,                                    /* @tp_members@ */
2018   0,                                    /* @tp_getset@ */
2019   0,                                    /* @tp_base@ */
2020   0,                                    /* @tp_dict@ */
2021   0,                                    /* @tp_descr_get@ */
2022   0,                                    /* @tp_descr_set@ */
2023   0,                                    /* @tp_dictoffset@ */
2024   0,                                    /* @tp_init@ */
2025   PyType_GenericAlloc,                  /* @tp_alloc@ */
2026   abstract_pynew,                       /* @tp_new@ */
2027   0,                                    /* @tp_free@ */
2028   0                                     /* @tp_is_gc@ */
2029 };
2030
2031 /*----- Message authentication --------------------------------------------*/
2032
2033 PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2034
2035 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2036 CONVFUNC(gmac, gmac *, GMAC_M)
2037 CONVFUNC(gmhash, ghash *, GHASH_H)
2038
2039 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2040 {
2041   static const char *const kwlist[] = { "k", 0 };
2042   char *k;
2043   Py_ssize_t sz;
2044
2045   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2046     goto end;
2047   if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
2048   return (gmac_pywrap((PyObject *)ty,
2049                       GM_KEY(GCMAC_CM(ty), k, sz)));
2050 end:
2051   return (0);
2052 }
2053
2054 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2055 {
2056   static const char *const kwlist[] = { 0 };
2057   ghash_pyobj *g;
2058
2059   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2060   g = PyObject_NEW(ghash_pyobj, ty);
2061   g->h = GM_INIT(GMAC_M(ty));
2062   Py_INCREF(ty);
2063   return ((PyObject *)g);
2064 }
2065
2066 PyObject *gcmac_pywrap(gcmac *cm)
2067 {
2068   gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2069   g->cm = cm;
2070   g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2071   g->ty.ht_type.tp_base = gmac_pytype;
2072   Py_INCREF(gmac_pytype);
2073   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2074                             Py_TPFLAGS_BASETYPE |
2075                             Py_TPFLAGS_HEAPTYPE);
2076   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2077   g->ty.ht_type.tp_free = 0;
2078   g->ty.ht_type.tp_new = gmac_pynew;
2079   typeready(&g->ty.ht_type);
2080   return ((PyObject *)g);
2081 }
2082
2083 PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2084 {
2085   gmac_pyobj *g;
2086   if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2087   else Py_INCREF(cobj);
2088   g = newtype((PyTypeObject *)cobj, 0, 0);
2089   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2090   g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
2091   g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
2092   g->ty.ht_type.tp_base = gmhash_pytype;
2093   Py_INCREF(gmac_pytype);
2094   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2095                             Py_TPFLAGS_BASETYPE |
2096                             Py_TPFLAGS_HEAPTYPE);
2097   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2098   g->ty.ht_type.tp_free = 0;
2099   g->ty.ht_type.tp_new = gmhash_pynew;
2100   typeready(&g->ty.ht_type);
2101   g->m = m;
2102   return ((PyObject *)g);
2103 }
2104
2105 static void gmac_pydealloc(PyObject *me)
2106 {
2107   GM_DESTROY(GMAC_M(me));
2108   Py_DECREF(me->ob_type);
2109   PyType_Type.tp_dealloc(me);
2110 }
2111
2112 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2113   { return (PyString_FromString(GCMAC_CM(me)->name)); }
2114
2115 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2116   { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2117
2118 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2119   { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2120
2121 static PyGetSetDef gcmac_pygetset[] = {
2122 #define GETSETNAME(op, name) gcm##op##_##name
2123   GET   (keysz,                 "CM.keysz -> acceptable key sizes")
2124   GET   (tagsz,                 "CM.tagsz -> MAC output size")
2125   GET   (name,                  "CM.name -> name of this kind of MAC")
2126 #undef GETSETNAME
2127   { 0 }
2128 };
2129
2130 static PyTypeObject gcmac_pytype_skel = {
2131   PyObject_HEAD_INIT(0) 0,              /* Header */
2132   "GCMAC",                              /* @tp_name@ */
2133   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2134   0,                                    /* @tp_itemsize@ */
2135
2136   0,                                    /* @tp_dealloc@ */
2137   0,                                    /* @tp_print@ */
2138   0,                                    /* @tp_getattr@ */
2139   0,                                    /* @tp_setattr@ */
2140   0,                                    /* @tp_compare@ */
2141   0,                                    /* @tp_repr@ */
2142   0,                                    /* @tp_as_number@ */
2143   0,                                    /* @tp_as_sequence@ */
2144   0,                                    /* @tp_as_mapping@ */
2145   0,                                    /* @tp_hash@ */
2146   0,                                    /* @tp_call@ */
2147   0,                                    /* @tp_str@ */
2148   0,                                    /* @tp_getattro@ */
2149   0,                                    /* @tp_setattro@ */
2150   0,                                    /* @tp_as_buffer@ */
2151   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2152     Py_TPFLAGS_BASETYPE,
2153
2154   /* @tp_doc@ */
2155 "Message authentication code metametaclass.",
2156
2157   0,                                    /* @tp_traverse@ */
2158   0,                                    /* @tp_clear@ */
2159   0,                                    /* @tp_richcompare@ */
2160   0,                                    /* @tp_weaklistoffset@ */
2161   0,                                    /* @tp_iter@ */
2162   0,                                    /* @tp_iternext@ */
2163   0,                                    /* @tp_methods@ */
2164   0,                                    /* @tp_members@ */
2165   gcmac_pygetset,                       /* @tp_getset@ */
2166   0,                                    /* @tp_base@ */
2167   0,                                    /* @tp_dict@ */
2168   0,                                    /* @tp_descr_get@ */
2169   0,                                    /* @tp_descr_set@ */
2170   0,                                    /* @tp_dictoffset@ */
2171   0,                                    /* @tp_init@ */
2172   PyType_GenericAlloc,                  /* @tp_alloc@ */
2173   abstract_pynew,                       /* @tp_new@ */
2174   0,                                    /* @tp_free@ */
2175   0                                     /* @tp_is_gc@ */
2176 };
2177
2178 static PyTypeObject gmac_pytype_skel = {
2179   PyObject_HEAD_INIT(0) 0,              /* Header */
2180   "GMAC",                               /* @tp_name@ */
2181   sizeof(gmac_pyobj),                   /* @tp_basicsize@ */
2182   0,                                    /* @tp_itemsize@ */
2183
2184   gmac_pydealloc,                       /* @tp_dealloc@ */
2185   0,                                    /* @tp_print@ */
2186   0,                                    /* @tp_getattr@ */
2187   0,                                    /* @tp_setattr@ */
2188   0,                                    /* @tp_compare@ */
2189   0,                                    /* @tp_repr@ */
2190   0,                                    /* @tp_as_number@ */
2191   0,                                    /* @tp_as_sequence@ */
2192   0,                                    /* @tp_as_mapping@ */
2193   0,                                    /* @tp_hash@ */
2194   0,                                    /* @tp_call@ */
2195   0,                                    /* @tp_str@ */
2196   0,                                    /* @tp_getattro@ */
2197   0,                                    /* @tp_setattro@ */
2198   0,                                    /* @tp_as_buffer@ */
2199   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2200     Py_TPFLAGS_BASETYPE,
2201
2202   /* @tp_doc@ */
2203 "Message authentication code metaclass, abstract base class.",
2204
2205   0,                                    /* @tp_traverse@ */
2206   0,                                    /* @tp_clear@ */
2207   0,                                    /* @tp_richcompare@ */
2208   0,                                    /* @tp_weaklistoffset@ */
2209   0,                                    /* @tp_iter@ */
2210   0,                                    /* @tp_iternext@ */
2211   0,                                    /* @tp_methods@ */
2212   0,                                    /* @tp_members@ */
2213   0,                                    /* @tp_getset@ */
2214   0,                                    /* @tp_base@ */
2215   0,                                    /* @tp_dict@ */
2216   0,                                    /* @tp_descr_get@ */
2217   0,                                    /* @tp_descr_set@ */
2218   0,                                    /* @tp_dictoffset@ */
2219   0,                                    /* @tp_init@ */
2220   PyType_GenericAlloc,                  /* @tp_alloc@ */
2221   abstract_pynew,                       /* @tp_new@ */
2222   0,                                    /* @tp_free@ */
2223   0                                     /* @tp_is_gc@ */
2224 };
2225
2226 static PyTypeObject gmhash_pytype_skel = {
2227   PyObject_HEAD_INIT(0) 0,              /* Header */
2228   "GMACHash",                           /* @tp_name@ */
2229   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2230   0,                                    /* @tp_itemsize@ */
2231
2232   ghash_pydealloc,                      /* @tp_dealloc@ */
2233   0,                                    /* @tp_print@ */
2234   0,                                    /* @tp_getattr@ */
2235   0,                                    /* @tp_setattr@ */
2236   0,                                    /* @tp_compare@ */
2237   0,                                    /* @tp_repr@ */
2238   0,                                    /* @tp_as_number@ */
2239   0,                                    /* @tp_as_sequence@ */
2240   0,                                    /* @tp_as_mapping@ */
2241   0,                                    /* @tp_hash@ */
2242   0,                                    /* @tp_call@ */
2243   0,                                    /* @tp_str@ */
2244   0,                                    /* @tp_getattro@ */
2245   0,                                    /* @tp_setattro@ */
2246   0,                                    /* @tp_as_buffer@ */
2247   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2248     Py_TPFLAGS_BASETYPE,
2249
2250   /* @tp_doc@ */
2251 "Message authentication code, abstract base class.",
2252
2253   0,                                    /* @tp_traverse@ */
2254   0,                                    /* @tp_clear@ */
2255   0,                                    /* @tp_richcompare@ */
2256   0,                                    /* @tp_weaklistoffset@ */
2257   0,                                    /* @tp_iter@ */
2258   0,                                    /* @tp_iternext@ */
2259   0,                                    /* @tp_methods@ */
2260   0,                                    /* @tp_members@ */
2261   0,                                    /* @tp_getset@ */
2262   0,                                    /* @tp_base@ */
2263   0,                                    /* @tp_dict@ */
2264   0,                                    /* @tp_descr_get@ */
2265   0,                                    /* @tp_descr_set@ */
2266   0,                                    /* @tp_dictoffset@ */
2267   0,                                    /* @tp_init@ */
2268   PyType_GenericAlloc,                  /* @tp_alloc@ */
2269   abstract_pynew,                       /* @tp_new@ */
2270   0,                                    /* @tp_free@ */
2271   0                                     /* @tp_is_gc@ */
2272 };
2273
2274 /*----- Special snowflake for Poly1305 ------------------------------------*/
2275
2276 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2277
2278 typedef struct poly1305key_pyobj {
2279   PyHeapTypeObject ty;
2280   poly1305_key k;
2281 } poly1305key_pyobj;
2282
2283 typedef struct poly1305hash_pyobj {
2284   PyObject_HEAD
2285   unsigned f;
2286 #define f_mask 1u
2287   poly1305_ctx ctx;
2288 } poly1305hash_pyobj;
2289
2290 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2291 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2292 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2293
2294 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2295                                     PyObject *arg, PyObject *kw)
2296 {
2297   static const char *const kwlist[] = { "mask", 0 };
2298   poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2299   poly1305hash_pyobj *ph;
2300   char *m = 0;
2301   Py_ssize_t sz;
2302
2303   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#:new", KWLIST, &m, &sz))
2304     return (0);
2305   if (m && sz != POLY1305_MASKSZ) VALERR("bad mask length");
2306   ph = PyObject_NEW(poly1305hash_pyobj, ty);
2307   ph->f = 0;
2308   if (m) ph->f |= f_mask;
2309   poly1305_macinit(&ph->ctx, &pk->k, m);
2310   Py_INCREF(ty);
2311   return ((PyObject *)ph);
2312 end:
2313   return (0);
2314 }
2315
2316 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2317                                    PyObject *arg, PyObject *kw)
2318 {
2319   static const char *const kwlist[] = { "k", 0 };
2320   poly1305key_pyobj *pk;
2321   char *k;
2322   Py_ssize_t sz;
2323
2324   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2325     goto end;
2326   if (keysz(sz, poly1305_keysz) != sz) VALERR("bad key length");
2327
2328   pk = newtype(ty, 0, 0);
2329   pk->ty.ht_name = PyString_FromString("poly1305(keyed)");
2330   pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2331   pk->ty.ht_type.tp_name = PyString_AS_STRING(pk->ty.ht_name);
2332   pk->ty.ht_type.tp_base = poly1305hash_pytype;
2333   Py_INCREF(poly1305key_pytype);
2334   pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2335                              Py_TPFLAGS_BASETYPE |
2336                              Py_TPFLAGS_HEAPTYPE);
2337   pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2338   pk->ty.ht_type.tp_free = 0;
2339   pk->ty.ht_type.tp_new = poly1305hash_pynew;
2340   typeready(&pk->ty.ht_type);
2341
2342   poly1305_keyinit(&pk->k, k, sz);
2343   return ((PyObject *)pk);
2344
2345 end:
2346   return (0);
2347 }
2348
2349 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2350   { return (PyString_FromString("poly1305")); }
2351
2352 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2353   { return (keysz_pywrap(poly1305_keysz)); }
2354
2355 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2356   { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2357
2358 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2359   { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2360
2361 static PyObject *polymeth_copy(PyObject *me, PyObject *arg)
2362 {
2363   poly1305hash_pyobj *ph;
2364   if (!PyArg_ParseTuple(arg, ":copy")) return (0);
2365   ph = PyObject_NEW(poly1305hash_pyobj, me->ob_type);
2366   poly1305_copy(&ph->ctx, P1305_CTX(me));
2367   Py_INCREF(me->ob_type);
2368   return ((PyObject *)ph);
2369 }
2370
2371 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2372 {
2373   char *p;
2374   Py_ssize_t sz;
2375   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2376   poly1305_hash(P1305_CTX(me), p, sz);
2377   RETURN_ME;
2378 }
2379
2380 #define POLYMETH_HASHU_(n, W, w)                                        \
2381   static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg)       \
2382   {                                                                     \
2383     uint##n x;                                                          \
2384     octet b[SZ_##W];                                                    \
2385     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2386     STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b));         \
2387     RETURN_ME;                                                          \
2388   }
2389 DOUINTCONV(POLYMETH_HASHU_)
2390
2391 #define POLYMETH_HASHBUF_(n, W, w)                                      \
2392   static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg)     \
2393   {                                                                     \
2394     char *p;                                                            \
2395     Py_ssize_t sz;                                                      \
2396     octet b[SZ_##W];                                                    \
2397     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
2398     if (sz > MASK##n) TYERR("string too long");                         \
2399     STORE##W(b, sz); poly1305_hash(P1305_CTX(me), b, sizeof(b));        \
2400     poly1305_hash(P1305_CTX(me), p, sz);                                \
2401     RETURN_ME;                                                          \
2402   end:                                                                  \
2403     return (0);                                                         \
2404   }
2405 DOUINTCONV(POLYMETH_HASHBUF_)
2406
2407 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2408 {
2409   char *p;
2410   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2411   poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2412   RETURN_ME;
2413 }
2414
2415 static PyObject *polymeth_flush(PyObject *me, PyObject *arg)
2416 {
2417   if (!PyArg_ParseTuple(arg, ":flush")) return (0);
2418   poly1305_flush(P1305_CTX(me));
2419   RETURN_ME;
2420 }
2421
2422 static PyObject *polymeth_flushzero(PyObject *me, PyObject *arg)
2423 {
2424   if (!PyArg_ParseTuple(arg, ":flushzero")) return (0);
2425   poly1305_flushzero(P1305_CTX(me));
2426   RETURN_ME;
2427 }
2428
2429 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2430 {
2431   PyObject *pre, *suff;
2432   if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2433   if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2434       !PyObject_TypeCheck(suff, poly1305hash_pytype))
2435     TYERR("wanted a poly1305hash");
2436   if (me->ob_type != pre->ob_type || me->ob_type != suff->ob_type)
2437     TYERR("key mismatch");
2438   if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2439   poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2440   RETURN_ME;
2441 end:
2442   return (0);
2443 }
2444
2445 static PyObject *polymeth_done(PyObject *me, PyObject *arg)
2446 {
2447   PyObject *rc;
2448   if (!PyArg_ParseTuple(arg, ":done")) return (0);
2449   if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2450   rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2451   poly1305_done(P1305_CTX(me), PyString_AS_STRING(rc));
2452   return (rc);
2453 end:
2454   return (0);
2455 }
2456
2457 static PyGetSetDef poly1305cls_pygetset[] = {
2458 #define GETSETNAME(op, name) poly1305cls##op##_##name
2459   GET   (keysz,                 "PC.keysz -> acceptable key sizes")
2460   GET   (masksz,                "PC.masksz -> mask size")
2461   GET   (tagsz,                 "PC.tagsz -> MAC output size")
2462   GET   (name,                  "PC.name -> name of this kind of MAC")
2463 #undef GETSETNAME
2464   { 0 }
2465 };
2466
2467 static PyMethodDef poly1305hash_pymethods[] = {
2468 #define METHNAME(name) polymeth_##name
2469   METH  (copy,                  "P.copy() -> PP")
2470   METH  (hash,                  "P.hash(M)")
2471 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2472   DOUINTCONV(METHU_)
2473 #undef METHU_
2474 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2475   DOUINTCONV(METHBUF_)
2476 #undef METHBUF_
2477   METH  (hashstrz,              "P.hashstrz(STRING)")
2478   METH  (flush,                 "P.flush()")
2479   METH  (flushzero,             "P.flushzero()")
2480   METH  (concat,                "P.concat(PREFIX, SUFFIX)")
2481   METH  (done,                  "P.done() -> TAG")
2482 #undef METHNAME
2483   { 0 }
2484 };
2485
2486 static PyTypeObject poly1305cls_pytype_skel = {
2487   PyObject_HEAD_INIT(0) 0,              /* Header */
2488   "Poly1305Class",                      /* @tp_name@ */
2489   sizeof(PyHeapTypeObject),             /* @tp_basicsize@ */
2490   0,                                    /* @tp_itemsize@ */
2491
2492   0,                                    /* @tp_dealloc@ */
2493   0,                                    /* @tp_print@ */
2494   0,                                    /* @tp_getattr@ */
2495   0,                                    /* @tp_setattr@ */
2496   0,                                    /* @tp_compare@ */
2497   0,                                    /* @tp_repr@ */
2498   0,                                    /* @tp_as_number@ */
2499   0,                                    /* @tp_as_sequence@ */
2500   0,                                    /* @tp_as_mapping@ */
2501   0,                                    /* @tp_hash@ */
2502   0,                                    /* @tp_call@ */
2503   0,                                    /* @tp_str@ */
2504   0,                                    /* @tp_getattro@ */
2505   0,                                    /* @tp_setattro@ */
2506   0,                                    /* @tp_as_buffer@ */
2507   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2508     Py_TPFLAGS_BASETYPE,
2509
2510   /* @tp_doc@ */
2511 "Poly1305 metametaclass.  Best not to ask.",
2512
2513   0,                                    /* @tp_traverse@ */
2514   0,                                    /* @tp_clear@ */
2515   0,                                    /* @tp_richcompare@ */
2516   0,                                    /* @tp_weaklistoffset@ */
2517   0,                                    /* @tp_iter@ */
2518   0,                                    /* @tp_iternext@ */
2519   0,                                    /* @tp_methods@ */
2520   0,                                    /* @tp_members@ */
2521   poly1305cls_pygetset,                 /* @tp_getset@ */
2522   0,                                    /* @tp_base@ */
2523   0,                                    /* @tp_dict@ */
2524   0,                                    /* @tp_descr_get@ */
2525   0,                                    /* @tp_descr_set@ */
2526   0,                                    /* @tp_dictoffset@ */
2527   0,                                    /* @tp_init@ */
2528   PyType_GenericAlloc,                  /* @tp_alloc@ */
2529   abstract_pynew,                       /* @tp_new@ */
2530   0,                                    /* @tp_free@ */
2531   0                                     /* @tp_is_gc@ */
2532 };
2533
2534 static PyTypeObject poly1305key_pytype_skel = {
2535   PyObject_HEAD_INIT(0) 0,              /* Header */
2536   "poly1305",                           /* @tp_name@ */
2537   sizeof(poly1305key_pyobj),            /* @tp_basicsize@ */
2538   0,                                    /* @tp_itemsize@ */
2539
2540   0,                                    /* @tp_dealloc@ */
2541   0,                                    /* @tp_print@ */
2542   0,                                    /* @tp_getattr@ */
2543   0,                                    /* @tp_setattr@ */
2544   0,                                    /* @tp_compare@ */
2545   0,                                    /* @tp_repr@ */
2546   0,                                    /* @tp_as_number@ */
2547   0,                                    /* @tp_as_sequence@ */
2548   0,                                    /* @tp_as_mapping@ */
2549   0,                                    /* @tp_hash@ */
2550   0,                                    /* @tp_call@ */
2551   0,                                    /* @tp_str@ */
2552   0,                                    /* @tp_getattro@ */
2553   0,                                    /* @tp_setattro@ */
2554   0,                                    /* @tp_as_buffer@ */
2555   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2556     Py_TPFLAGS_BASETYPE,
2557
2558   /* @tp_doc@ */
2559 "poly1305(K): Poly1305 key.",
2560
2561   0,                                    /* @tp_traverse@ */
2562   0,                                    /* @tp_clear@ */
2563   0,                                    /* @tp_richcompare@ */
2564   0,                                    /* @tp_weaklistoffset@ */
2565   0,                                    /* @tp_iter@ */
2566   0,                                    /* @tp_iternext@ */
2567   0,                                    /* @tp_methods@ */
2568   0,                                    /* @tp_members@ */
2569   0,                                    /* @tp_getset@ */
2570   0,                                    /* @tp_base@ */
2571   0,                                    /* @tp_dict@ */
2572   0,                                    /* @tp_descr_get@ */
2573   0,                                    /* @tp_descr_set@ */
2574   0,                                    /* @tp_dictoffset@ */
2575   0,                                    /* @tp_init@ */
2576   PyType_GenericAlloc,                  /* @tp_alloc@ */
2577   poly1305key_pynew,                    /* @tp_new@ */
2578   0,                                    /* @tp_free@ */
2579   0                                     /* @tp_is_gc@ */
2580 };
2581
2582 static PyTypeObject poly1305hash_pytype_skel = {
2583   PyObject_HEAD_INIT(0) 0,              /* Header */
2584   "Poly1305Hash",                       /* @tp_name@ */
2585   sizeof(poly1305hash_pyobj),           /* @tp_basicsize@ */
2586   0,                                    /* @tp_itemsize@ */
2587
2588   0,                                    /* @tp_dealloc@ */
2589   0,                                    /* @tp_print@ */
2590   0,                                    /* @tp_getattr@ */
2591   0,                                    /* @tp_setattr@ */
2592   0,                                    /* @tp_compare@ */
2593   0,                                    /* @tp_repr@ */
2594   0,                                    /* @tp_as_number@ */
2595   0,                                    /* @tp_as_sequence@ */
2596   0,                                    /* @tp_as_mapping@ */
2597   0,                                    /* @tp_hash@ */
2598   0,                                    /* @tp_call@ */
2599   0,                                    /* @tp_str@ */
2600   0,                                    /* @tp_getattro@ */
2601   0,                                    /* @tp_setattro@ */
2602   0,                                    /* @tp_as_buffer@ */
2603   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2604     Py_TPFLAGS_BASETYPE,
2605
2606   /* @tp_doc@ */
2607 "Poly1305 MAC context base class.",
2608
2609   0,                                    /* @tp_traverse@ */
2610   0,                                    /* @tp_clear@ */
2611   0,                                    /* @tp_richcompare@ */
2612   0,                                    /* @tp_weaklistoffset@ */
2613   0,                                    /* @tp_iter@ */
2614   0,                                    /* @tp_iternext@ */
2615   poly1305hash_pymethods,               /* @tp_methods@ */
2616   0,                                    /* @tp_members@ */
2617   0,                                    /* @tp_getset@ */
2618   0,                                    /* @tp_base@ */
2619   0,                                    /* @tp_dict@ */
2620   0,                                    /* @tp_descr_get@ */
2621   0,                                    /* @tp_descr_set@ */
2622   0,                                    /* @tp_dictoffset@ */
2623   0,                                    /* @tp_init@ */
2624   PyType_GenericAlloc,                  /* @tp_alloc@ */
2625   abstract_pynew,                       /* @tp_new@ */
2626   0,                                    /* @tp_free@ */
2627   0                                     /* @tp_is_gc@ */
2628 };
2629
2630 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2631
2632 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance)                        \
2633   static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg)     \
2634   {                                                                     \
2635     dance##_ctx dance;                                                  \
2636     char *k, *n;                                                        \
2637     Py_ssize_t ksz, nsz;                                                \
2638     PyObject *rc;                                                       \
2639     if (!PyArg_ParseTuple(arg, "s#s#:" #hdance "_prf",                  \
2640                           &k, &ksz, &n, &nsz))                          \
2641       goto end;                                                         \
2642     if (ksz != DANCE##_KEYSZ) VALERR("bad key length");                 \
2643     if (nsz != HDANCE##_INSZ) VALERR("bad input length");               \
2644     rc = bytestring_pywrap(0, HSALSA20_OUTSZ);                          \
2645     dance##_init(&dance, k, ksz, 0);                                    \
2646     hdance##_prf(&dance, n, PyString_AS_STRING(rc));                    \
2647     return (rc);                                                        \
2648   end:                                                                  \
2649     return (0);                                                         \
2650   }
2651
2652 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2653 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2654 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2655
2656 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2657 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2658 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2659
2660 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2661
2662 static PyTypeObject *kxvik_pytype;
2663
2664 typedef struct kxvik_pyobj {
2665   PyObject_HEAD
2666   keccak1600_state s;
2667   unsigned n;
2668 } kxvik_pyobj;
2669
2670 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2671 {
2672   unsigned n = 24;
2673   kxvik_pyobj *rc = 0;
2674   static const char *const kwlist[] = { "nround", 0 };
2675   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2676                                    convuint, &n))
2677     goto end;
2678   rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2679   rc->n = n;
2680   keccak1600_init(&rc->s);
2681 end:
2682   return ((PyObject *)rc);
2683 }
2684
2685 static PyObject *kxvikmeth_copy(PyObject *me, PyObject *arg)
2686 {
2687   kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2688   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
2689   rc = (kxvik_pyobj *)k->ob_type->tp_alloc(k->ob_type, 0);
2690   rc->s = k->s; rc->n = k->n;
2691 end:
2692   return ((PyObject *)rc);
2693 }
2694
2695 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2696 {
2697   kxvik_pyobj *k = (kxvik_pyobj *)me;
2698   kludge64 t[25];
2699   const octet *q;
2700   octet buf[8];
2701   unsigned i;
2702   char *p; Py_ssize_t n;
2703
2704   if (!PyArg_ParseTuple(arg, "s#:mix", &p, &n)) goto end;
2705   if (n > 200) VALERR("out of range");
2706   q = (const octet *)p;
2707   i = 0;
2708   while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2709   if (n) {
2710     memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2711     LOAD64_L_(t[i], buf); i++;
2712   }
2713   keccak1600_mix(&k->s, t, i);
2714   RETURN_ME;
2715 end:
2716   return (0);
2717 }
2718
2719 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2720 {
2721   kxvik_pyobj *k = (kxvik_pyobj *)me;
2722   PyObject *rc = 0;
2723   kludge64 t[25];
2724   octet *q, buf[8];
2725   unsigned i;
2726   unsigned n;
2727
2728   if (!PyArg_ParseTuple(arg, "O&:mix", convuint, &n)) goto end;
2729   if (n > 200) VALERR("out of range");
2730   rc = bytestring_pywrap(0, n);
2731   q = (octet *)PyString_AS_STRING(rc);
2732   keccak1600_extract(&k->s, t, (n + 7)/8);
2733   i = 0;
2734   while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2735   if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2736 end:
2737   return (rc);
2738 }
2739
2740 static PyObject *kxvikmeth_step(PyObject *me, PyObject *arg)
2741 {
2742   kxvik_pyobj *k = (kxvik_pyobj *)me;
2743   if (!PyArg_ParseTuple(arg, ":step")) return (0);
2744   keccak1600_p(&k->s, &k->s, k->n);
2745   RETURN_ME;
2746 }
2747
2748 static PyObject *kxvikget_nround(PyObject *me, void *hunoz)
2749 {
2750   kxvik_pyobj *k = (kxvik_pyobj *)me;
2751   return (PyInt_FromLong(k->n));
2752 }
2753
2754 static int kxvikset_nround(PyObject *me, PyObject *val, void *hunoz)
2755 {
2756   kxvik_pyobj *k = (kxvik_pyobj *)me;
2757   unsigned n;
2758
2759   if (!convuint(val, &n)) return (-1);
2760   k->n = n;
2761   return (0);
2762 }
2763
2764 static PyGetSetDef kxvik_pygetset[] = {
2765 #define GETSETNAME(op, name) kxvik##op##_##name
2766   GETSET(nround,                "KECCAK.nround -> number of rounds")
2767 #undef GETSETNAME
2768   { 0 }
2769 };
2770
2771 static PyMethodDef kxvik_pymethods[] = {
2772 #define METHNAME(func) kxvikmeth_##func
2773   METH  (copy,                  "KECCAK.copy() -> KECCAK'")
2774   METH  (mix,                   "KECCAK.mix(DATA)")
2775   METH  (extract,               "KECCAK.extract(NOCTETS)")
2776   METH  (step,                  "KECCAK.step()")
2777 #undef METHNAME
2778   { 0 }
2779 };
2780
2781 static PyTypeObject kxvik_pytype_skel = {
2782   PyObject_HEAD_INIT(0) 0,              /* Header */
2783   "Keccak1600",                         /* @tp_name@ */
2784   sizeof(kxvik_pyobj),                  /* @tp_basicsize@ */
2785   0,                                    /* @tp_itemsize@ */
2786
2787   0,                                    /* @tp_dealloc@ */
2788   0,                                    /* @tp_print@ */
2789   0,                                    /* @tp_getattr@ */
2790   0,                                    /* @tp_setattr@ */
2791   0,                                    /* @tp_compare@ */
2792   0,                                    /* @tp_repr@ */
2793   0,                                    /* @tp_as_number@ */
2794   0,                                    /* @tp_as_sequence@ */
2795   0,                                    /* @tp_as_mapping@ */
2796   0,                                    /* @tp_hash@ */
2797   0,                                    /* @tp_call@ */
2798   0,                                    /* @tp_str@ */
2799   0,                                    /* @tp_getattro@ */
2800   0,                                    /* @tp_setattro@ */
2801   0,                                    /* @tp_as_buffer@ */
2802   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2803     Py_TPFLAGS_BASETYPE,
2804
2805   /* @tp_doc@ */
2806 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2807
2808   0,                                    /* @tp_traverse@ */
2809   0,                                    /* @tp_clear@ */
2810   0,                                    /* @tp_richcompare@ */
2811   0,                                    /* @tp_weaklistoffset@ */
2812   0,                                    /* @tp_iter@ */
2813   0,                                    /* @tp_iternext@ */
2814   kxvik_pymethods,                      /* @tp_methods@ */
2815   0,                                    /* @tp_members@ */
2816   kxvik_pygetset,                       /* @tp_getset@ */
2817   0,                                    /* @tp_base@ */
2818   0,                                    /* @tp_dict@ */
2819   0,                                    /* @tp_descr_get@ */
2820   0,                                    /* @tp_descr_set@ */
2821   0,                                    /* @tp_dictoffset@ */
2822   0,                                    /* @tp_init@ */
2823   PyType_GenericAlloc,                  /* @tp_alloc@ */
2824   kxvik_pynew,                          /* @tp_new@ */
2825   0,                                    /* @tp_free@ */
2826   0                                     /* @tp_is_gc@ */
2827 };
2828
2829 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2830
2831 typedef struct shake_pyobj {
2832   PyObject_HEAD
2833   int st;
2834   shake_ctx h;
2835 } shake_pyobj;
2836
2837 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
2838 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
2839
2840 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
2841                                               const void *, size_t,
2842                                               const void *, size_t),
2843                                PyTypeObject *ty,
2844                                PyObject *arg, PyObject *kw)
2845 {
2846   shake_pyobj *rc = 0;
2847   char *p = 0, *f = 0;
2848   Py_ssize_t psz = 0, fsz = 0;
2849   static const char *const kwlist[] = { "perso", "func", 0 };
2850
2851   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#s#:new", KWLIST,
2852                                    &p, &psz, &f, &fsz))
2853     goto end;
2854   rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
2855   initfn(&rc->h, f, fsz, p, psz);
2856   rc->st = 0;
2857 end:
2858   return ((PyObject *)rc);
2859 }
2860
2861 static PyObject *shake128_pynew(PyTypeObject *ty,
2862                                 PyObject *arg, PyObject *kw)
2863   { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
2864
2865 static PyObject *shake256_pynew(PyTypeObject *ty,
2866                                 PyObject *arg, PyObject *kw)
2867   { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
2868
2869 static int shake_check(PyObject *me, int st)
2870 {
2871   if (SHAKE_ST(me) != st) VALERR("wrong state");
2872   return (0);
2873 end:
2874   return (-1);
2875 }
2876
2877 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
2878 {
2879   char *p;
2880   Py_ssize_t sz;
2881   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2882   if (shake_check(me, 0)) return (0);
2883   shake_hash(SHAKE_H(me), p, sz);
2884   RETURN_ME;
2885 }
2886
2887 #define SHAKEMETH_HASHU_(n, W, w)                                       \
2888   static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg)      \
2889   {                                                                     \
2890     uint##n x;                                                          \
2891     octet b[SZ_##W];                                                    \
2892     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2893     if (shake_check(me, 0)) return (0);                                 \
2894     STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b));              \
2895     RETURN_ME;                                                          \
2896   }
2897 DOUINTCONV(SHAKEMETH_HASHU_)
2898
2899 #define SHAKEMETH_HASHBUF_(n, W, w)                                     \
2900   static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg)    \
2901   {                                                                     \
2902     char *p;                                                            \
2903     Py_ssize_t sz;                                                      \
2904     octet b[SZ_##W];                                                    \
2905     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
2906     if (sz > MASK##n) TYERR("string too long");                         \
2907     if (shake_check(me, 0)) goto end;                                   \
2908     STORE##W(b, sz); shake_hash(SHAKE_H(me), b, sizeof(b));             \
2909     shake_hash(SHAKE_H(me), p, sz);                                     \
2910     RETURN_ME;                                                          \
2911   end:                                                                  \
2912     return (0);                                                         \
2913   }
2914 DOUINTCONV(SHAKEMETH_HASHBUF_)
2915
2916 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
2917 {
2918   char *p;
2919   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2920   if (shake_check(me, 0)) return (0);
2921   shake_hash(SHAKE_H(me), p, strlen(p) + 1);
2922   RETURN_ME;
2923 }
2924
2925 static PyObject *shakemeth_xof(PyObject *me, PyObject *arg)
2926 {
2927   if (!PyArg_ParseTuple(arg, ":xof")) goto end;
2928   if (shake_check(me, 0)) goto end;
2929   shake_xof(SHAKE_H(me));
2930   SHAKE_ST(me) = 1;
2931   RETURN_ME;
2932 end:
2933   return (0);
2934 }
2935
2936 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
2937 {
2938   PyObject *rc = 0;
2939   size_t n;
2940   if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
2941   if (shake_check(me, 0)) goto end;
2942   rc = bytestring_pywrap(0, n);
2943   shake_done(SHAKE_H(me), PyString_AS_STRING(rc), n);
2944   SHAKE_ST(me) = -1;
2945 end:
2946   return (rc);
2947 }
2948
2949 static PyObject *shakemeth_copy(PyObject *me, PyObject *arg)
2950 {
2951   shake_pyobj *rc = 0;
2952
2953   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
2954   rc = PyObject_NEW(shake_pyobj, me->ob_type);
2955   rc->h = *SHAKE_H(me);
2956   rc->st = SHAKE_ST(me);
2957 end:
2958   return ((PyObject *)me);
2959 }
2960
2961 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
2962 {
2963   PyObject *rc = 0;
2964   size_t sz;
2965
2966   if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
2967   if (shake_check(me, 1)) goto end;
2968   rc = bytestring_pywrap(0, sz);
2969   shake_get(SHAKE_H(me), PyString_AS_STRING(rc), sz);
2970 end:
2971   return (rc);
2972 }
2973
2974 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
2975 {
2976   PyObject *rc = 0;
2977   char *p; Py_ssize_t sz;
2978
2979   if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) goto end;
2980   if (shake_check(me, 1)) goto end;
2981   rc = bytestring_pywrap(0, sz);
2982   shake_mask(SHAKE_H(me), p, PyString_AS_STRING(rc), sz);
2983 end:
2984   return (rc);
2985 }
2986
2987 static PyObject *shakeget_rate(PyObject *me, void *hunoz)
2988   { return (PyInt_FromLong(SHAKE_H(me)->h.r)); }
2989
2990 static PyObject *shakeget_buffered(PyObject *me, void *hunoz)
2991   { return (PyInt_FromLong(SHAKE_H(me)->h.n)); }
2992
2993 static PyObject *shakeget_state(PyObject *me, void *hunoz)
2994 {
2995   int st = SHAKE_ST(me);
2996   return (PyString_FromString(st == 0 ? "absorb" :
2997                               st == 1 ? "squeeze" : "dead"));
2998 }
2999
3000 static PyGetSetDef shake_pygetset[] = {
3001 #define GETSETNAME(op, name) shake##op##_##name
3002   GET   (rate,                  "S.rate -> rate, in bytes")
3003   GET   (buffered,              "S.buffered -> amount currently buffered")
3004   GET   (state,                 "S.state -> `absorb', `squeeze', `dead'")
3005 #undef GETSETNAME
3006   { 0 }
3007 };
3008
3009 static PyMethodDef shake_pymethods[] = {
3010 #define METHNAME(func) shakemeth_##func
3011   METH  (copy,                  "S.copy() -> SS")
3012   METH  (hash,                  "S.hash(M)")
3013 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3014   DOUINTCONV(METHU_)
3015 #undef METHU_
3016 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3017   DOUINTCONV(METHBUF_)
3018 #undef METHBUF_
3019   METH  (hashstrz,              "S.hashstrz(STRING)")
3020   METH  (xof,                   "S.xof()")
3021   METH  (done,                  "S.done(LEN) ->H")
3022   METH  (get,                   "S.get(LEN) -> H")
3023   METH  (mask,                  "S.mask(M) -> C")
3024 #undef METHNAME
3025   { 0 }
3026 };
3027
3028 static PyTypeObject shake_pytype_skel = {
3029   PyObject_HEAD_INIT(0) 0,              /* Header */
3030   "Shake",                              /* @tp_name@ */
3031   sizeof(shake_pyobj),                  /* @tp_basicsize@ */
3032   0,                                    /* @tp_itemsize@ */
3033
3034   0,                                    /* @tp_dealloc@ */
3035   0,                                    /* @tp_print@ */
3036   0,                                    /* @tp_getattr@ */
3037   0,                                    /* @tp_setattr@ */
3038   0,                                    /* @tp_compare@ */
3039   0,                                    /* @tp_repr@ */
3040   0,                                    /* @tp_as_number@ */
3041   0,                                    /* @tp_as_sequence@ */
3042   0,                                    /* @tp_as_mapping@ */
3043   0,                                    /* @tp_hash@ */
3044   0,                                    /* @tp_call@ */
3045   0,                                    /* @tp_str@ */
3046   0,                                    /* @tp_getattro@ */
3047   0,                                    /* @tp_setattro@ */
3048   0,                                    /* @tp_as_buffer@ */
3049   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3050     Py_TPFLAGS_BASETYPE,
3051
3052   /* @tp_doc@ */
3053 "SHAKE/cSHAKE base class.",
3054
3055   0,                                    /* @tp_traverse@ */
3056   0,                                    /* @tp_clear@ */
3057   0,                                    /* @tp_richcompare@ */
3058   0,                                    /* @tp_weaklistoffset@ */
3059   0,                                    /* @tp_iter@ */
3060   0,                                    /* @tp_iternext@ */
3061   shake_pymethods,                      /* @tp_methods@ */
3062   0,                                    /* @tp_members@ */
3063   shake_pygetset,                       /* @tp_getset@ */
3064   0,                                    /* @tp_base@ */
3065   0,                                    /* @tp_dict@ */
3066   0,                                    /* @tp_descr_get@ */
3067   0,                                    /* @tp_descr_set@ */
3068   0,                                    /* @tp_dictoffset@ */
3069   0,                                    /* @tp_init@ */
3070   PyType_GenericAlloc,                  /* @tp_alloc@ */
3071   abstract_pynew,                       /* @tp_new@ */
3072   0,                                    /* @tp_free@ */
3073   0                                     /* @tp_is_gc@ */
3074 };
3075
3076 static PyTypeObject shake128_pytype_skel = {
3077   PyObject_HEAD_INIT(0) 0,              /* Header */
3078   "Shake128",                           /* @tp_name@ */
3079   0,                                    /* @tp_basicsize@ */
3080   0,                                    /* @tp_itemsize@ */
3081
3082   0,                                    /* @tp_dealloc@ */
3083   0,                                    /* @tp_print@ */
3084   0,                                    /* @tp_getattr@ */
3085   0,                                    /* @tp_setattr@ */
3086   0,                                    /* @tp_compare@ */
3087   0,                                    /* @tp_repr@ */
3088   0,                                    /* @tp_as_number@ */
3089   0,                                    /* @tp_as_sequence@ */
3090   0,                                    /* @tp_as_mapping@ */
3091   0,                                    /* @tp_hash@ */
3092   0,                                    /* @tp_call@ */
3093   0,                                    /* @tp_str@ */
3094   0,                                    /* @tp_getattro@ */
3095   0,                                    /* @tp_setattro@ */
3096   0,                                    /* @tp_as_buffer@ */
3097   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3098     Py_TPFLAGS_BASETYPE,
3099
3100   /* @tp_doc@ */
3101 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3102
3103   0,                                    /* @tp_traverse@ */
3104   0,                                    /* @tp_clear@ */
3105   0,                                    /* @tp_richcompare@ */
3106   0,                                    /* @tp_weaklistoffset@ */
3107   0,                                    /* @tp_iter@ */
3108   0,                                    /* @tp_iternext@ */
3109   0,                                    /* @tp_methods@ */
3110   0,                                    /* @tp_members@ */
3111   0,                                    /* @tp_getset@ */
3112   0,                                    /* @tp_base@ */
3113   0,                                    /* @tp_dict@ */
3114   0,                                    /* @tp_descr_get@ */
3115   0,                                    /* @tp_descr_set@ */
3116   0,                                    /* @tp_dictoffset@ */
3117   0,                                    /* @tp_init@ */
3118   PyType_GenericAlloc,                  /* @tp_alloc@ */
3119   shake128_pynew,                       /* @tp_new@ */
3120   0,                                    /* @tp_free@ */
3121   0                                     /* @tp_is_gc@ */
3122 };
3123
3124 static PyTypeObject shake256_pytype_skel = {
3125   PyObject_HEAD_INIT(0) 0,              /* Header */
3126   "Shake256",                           /* @tp_name@ */
3127   0,                                    /* @tp_basicsize@ */
3128   0,                                    /* @tp_itemsize@ */
3129
3130   0,                                    /* @tp_dealloc@ */
3131   0,                                    /* @tp_print@ */
3132   0,                                    /* @tp_getattr@ */
3133   0,                                    /* @tp_setattr@ */
3134   0,                                    /* @tp_compare@ */
3135   0,                                    /* @tp_repr@ */
3136   0,                                    /* @tp_as_number@ */
3137   0,                                    /* @tp_as_sequence@ */
3138   0,                                    /* @tp_as_mapping@ */
3139   0,                                    /* @tp_hash@ */
3140   0,                                    /* @tp_call@ */
3141   0,                                    /* @tp_str@ */
3142   0,                                    /* @tp_getattro@ */
3143   0,                                    /* @tp_setattro@ */
3144   0,                                    /* @tp_as_buffer@ */
3145   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3146     Py_TPFLAGS_BASETYPE,
3147
3148   /* @tp_doc@ */
3149 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3150
3151   0,                                    /* @tp_traverse@ */
3152   0,                                    /* @tp_clear@ */
3153   0,                                    /* @tp_richcompare@ */
3154   0,                                    /* @tp_weaklistoffset@ */
3155   0,                                    /* @tp_iter@ */
3156   0,                                    /* @tp_iternext@ */
3157   0,                                    /* @tp_methods@ */
3158   0,                                    /* @tp_members@ */
3159   0,                                    /* @tp_getset@ */
3160   0,                                    /* @tp_base@ */
3161   0,                                    /* @tp_dict@ */
3162   0,                                    /* @tp_descr_get@ */
3163   0,                                    /* @tp_descr_set@ */
3164   0,                                    /* @tp_dictoffset@ */
3165   0,                                    /* @tp_init@ */
3166   PyType_GenericAlloc,                  /* @tp_alloc@ */
3167   shake256_pynew,                       /* @tp_new@ */
3168   0,                                    /* @tp_free@ */
3169   0                                     /* @tp_is_gc@ */
3170 };
3171
3172 /*----- Pseudorandom permutations -----------------------------------------*/
3173
3174 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3175
3176 typedef struct prpinfo {
3177   const char *name;
3178   const octet *keysz;
3179   size_t ctxsz;
3180   size_t blksz;
3181   void (*init)(void *, const void *, size_t);
3182   void (*eblk)(void *, const void *, void *);
3183   void (*dblk)(void *, const void *, void *);
3184 } prpinfo;
3185
3186 #define PRP_DEF(PRE, pre)                                               \
3187   static void pre##_prpinit(void *ctx, const void *k, size_t ksz)       \
3188     { pre##_init(ctx, k, ksz); }                                        \
3189   static void pre##_prpeblk(void *ctx, const void *in, void *out)       \
3190   {                                                                     \
3191     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3192     pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3193   }                                                                     \
3194   static void pre##_prpdblk(void *ctx, const void *in, void *out)       \
3195   {                                                                     \
3196     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3197     pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3198   }                                                                     \
3199   static const prpinfo pre##_prpinfo = {                                \
3200     #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ,                  \
3201     pre##_prpinit, pre##_prpeblk, pre##_prpdblk                         \
3202   };
3203 PRPS(PRP_DEF)
3204
3205 static const struct prpinfo *const gprptab[] = {
3206 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3207   PRPS(PRP_ENTRY)
3208   0
3209 };
3210
3211 typedef struct gcprp_pyobj {
3212   PyHeapTypeObject ty;
3213   const prpinfo *prp;
3214 } gcprp_pyobj;
3215 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3216
3217 typedef struct gprp_pyobj {
3218   PyObject_HEAD
3219   const prpinfo *prp;
3220 } gprp_pyobj;
3221 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3222 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3223
3224 typedef struct prp {
3225   const prpinfo *prp;
3226   void *ctx;
3227 } prp;
3228
3229 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3230 {
3231   static const char *const kwlist[] = { "key", 0 };
3232   char *k;
3233   Py_ssize_t sz;
3234   const prpinfo *prp = GCPRP_PRP(ty);
3235   PyObject *me;
3236
3237   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
3238     goto end;
3239   if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
3240   me = (PyObject *)ty->tp_alloc(ty, 0);
3241   GPRP_PRP(me) = prp;
3242   prp->init(GPRP_CTX(me), k, sz);
3243   Py_INCREF(me);
3244   return (me);
3245 end:
3246   return (0);
3247 }
3248
3249 static void gprp_pydealloc(PyObject *me)
3250   { Py_DECREF(me->ob_type); FREEOBJ(me); }
3251
3252 static PyObject *gcprp_pywrap(const prpinfo *prp)
3253 {
3254   gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3255   g->prp = prp;
3256   g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3257   g->ty.ht_type.tp_base = gprp_pytype;
3258   Py_INCREF(gprp_pytype);
3259   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3260                             Py_TPFLAGS_BASETYPE |
3261                             Py_TPFLAGS_HEAPTYPE);
3262   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3263   g->ty.ht_type.tp_free = 0;
3264   g->ty.ht_type.tp_new = gprp_pynew;
3265   typeready(&g->ty.ht_type);
3266   return ((PyObject *)g);
3267 }
3268
3269 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3270   { return (PyString_FromString(GCPRP_PRP(me)->name)); }
3271 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3272   { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3273 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3274   { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3275
3276 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3277 {
3278   char *p;
3279   Py_ssize_t n;
3280   PyObject *rc = 0;
3281
3282   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
3283   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3284   rc = bytestring_pywrap(0, n);
3285   GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3286 end:
3287   return (rc);
3288 }
3289
3290 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3291 {
3292   char *p;
3293   Py_ssize_t n;
3294   PyObject *rc = 0;
3295
3296   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
3297   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3298   rc = bytestring_pywrap(0, n);
3299   GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3300 end:
3301   return (rc);
3302 }
3303
3304 static PyGetSetDef gcprp_pygetset[] = {
3305 #define GETSETNAME(op, name) gcp##op##_##name
3306   GET   (keysz,                 "CP.keysz -> acceptable key sizes")
3307   GET   (blksz,                 "CP.blksz -> block size")
3308   GET   (name,                  "CP.name -> name of this kind of PRP")
3309 #undef GETSETNAME
3310   { 0 }
3311 };
3312
3313 static PyMethodDef gprp_pymethods[] = {
3314 #define METHNAME(name) gpmeth_##name
3315   METH  (encrypt,               "P.encrypt(PT) -> CT")
3316   METH  (decrypt,               "P.decrypt(CT) -> PT")
3317 #undef METHNAME
3318   { 0 }
3319 };
3320
3321 static PyTypeObject gcprp_pytype_skel = {
3322   PyObject_HEAD_INIT(0) 0,              /* Header */
3323   "GCPRP",                              /* @tp_name@ */
3324   sizeof(gcprp_pyobj),                  /* @tp_basicsize@ */
3325   0,                                    /* @tp_itemsize@ */
3326
3327   0,                                    /* @tp_dealloc@ */
3328   0,                                    /* @tp_print@ */
3329   0,                                    /* @tp_getattr@ */
3330   0,                                    /* @tp_setattr@ */
3331   0,                                    /* @tp_compare@ */
3332   0,                                    /* @tp_repr@ */
3333   0,                                    /* @tp_as_number@ */
3334   0,                                    /* @tp_as_sequence@ */
3335   0,                                    /* @tp_as_mapping@ */
3336   0,                                    /* @tp_hash@ */
3337   0,                                    /* @tp_call@ */
3338   0,                                    /* @tp_str@ */
3339   0,                                    /* @tp_getattro@ */
3340   0,                                    /* @tp_setattro@ */
3341   0,                                    /* @tp_as_buffer@ */
3342   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3343     Py_TPFLAGS_BASETYPE,
3344
3345   /* @tp_doc@ */
3346 "Pseudorandom permutation metaclass.",
3347
3348   0,                                    /* @tp_traverse@ */
3349   0,                                    /* @tp_clear@ */
3350   0,                                    /* @tp_richcompare@ */
3351   0,                                    /* @tp_weaklistoffset@ */
3352   0,                                    /* @tp_iter@ */
3353   0,                                    /* @tp_iternext@ */
3354   0,                                    /* @tp_methods@ */
3355   0,                                    /* @tp_members@ */
3356   gcprp_pygetset,                       /* @tp_getset@ */
3357   0,                                    /* @tp_base@ */
3358   0,                                    /* @tp_dict@ */
3359   0,                                    /* @tp_descr_get@ */
3360   0,                                    /* @tp_descr_set@ */
3361   0,                                    /* @tp_dictoffset@ */
3362   0,                                    /* @tp_init@ */
3363   PyType_GenericAlloc,                  /* @tp_alloc@ */
3364   abstract_pynew,                       /* @tp_new@ */
3365   0,                                    /* @tp_free@ */
3366   0                                     /* @tp_is_gc@ */
3367 };
3368
3369 static PyTypeObject gprp_pytype_skel = {
3370   PyObject_HEAD_INIT(0) 0,              /* Header */
3371   "GPRP",                               /* @tp_name@ */
3372   sizeof(gprp_pyobj),                   /* @tp_basicsize@ */
3373   0,                                    /* @tp_itemsize@ */
3374
3375   gprp_pydealloc,                       /* @tp_dealloc@ */
3376   0,                                    /* @tp_print@ */
3377   0,                                    /* @tp_getattr@ */
3378   0,                                    /* @tp_setattr@ */
3379   0,                                    /* @tp_compare@ */
3380   0,                                    /* @tp_repr@ */
3381   0,                                    /* @tp_as_number@ */
3382   0,                                    /* @tp_as_sequence@ */
3383   0,                                    /* @tp_as_mapping@ */
3384   0,                                    /* @tp_hash@ */
3385   0,                                    /* @tp_call@ */
3386   0,                                    /* @tp_str@ */
3387   0,                                    /* @tp_getattro@ */
3388   0,                                    /* @tp_setattro@ */
3389   0,                                    /* @tp_as_buffer@ */
3390   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3391     Py_TPFLAGS_BASETYPE,
3392
3393   /* @tp_doc@ */
3394 "Pseudorandom permutation, abstract base class.",
3395
3396   0,                                    /* @tp_traverse@ */
3397   0,                                    /* @tp_clear@ */
3398   0,                                    /* @tp_richcompare@ */
3399   0,                                    /* @tp_weaklistoffset@ */
3400   0,                                    /* @tp_iter@ */
3401   0,                                    /* @tp_iternext@ */
3402   gprp_pymethods,                       /* @tp_methods@ */
3403   0,                                    /* @tp_members@ */
3404   0,                                    /* @tp_getset@ */
3405   0,                                    /* @tp_base@ */
3406   0,                                    /* @tp_dict@ */
3407   0,                                    /* @tp_descr_get@ */
3408   0,                                    /* @tp_descr_set@ */
3409   0,                                    /* @tp_dictoffset@ */
3410   0,                                    /* @tp_init@ */
3411   PyType_GenericAlloc,                  /* @tp_alloc@ */
3412   abstract_pynew,                       /* @tp_new@ */
3413   0,                                    /* @tp_free@ */
3414   0                                     /* @tp_is_gc@ */
3415 };
3416
3417 /*----- Main code ---------------------------------------------------------*/
3418
3419 static PyMethodDef methods[] = {
3420 #define METHNAME(func) meth_##func
3421   METH  (_KeySZ_fromdl,         "\
3422 fromdl(N) -> M: convert integer discrete log field size to work factor")
3423   METH  (_KeySZ_fromschnorr,    "\
3424 fromschnorr(N) -> M: convert Schnorr group order to work factor")
3425   METH  (_KeySZ_fromif,         "\
3426 fromif(N) -> M: convert integer factorization problem size to work factor")
3427   METH  (_KeySZ_fromec,         "\
3428 fromec(N) -> M: convert elliptic curve group order to work factor")
3429   METH  (_KeySZ_todl,           "\
3430 todl(N) -> M: convert work factor to integer discrete log field size")
3431   METH  (_KeySZ_toschnorr,      "\
3432 toschnorr(N) -> M: convert work factor to Schnorr group order")
3433   METH  (_KeySZ_toif,           "\
3434 toif(N) -> M: convert work factor to integer factorization problem size")
3435   METH  (_KeySZ_toec,           "\
3436 toec(N) -> M: convert work factor to elliptic curve group order")
3437   METH  (_KeySZ_toec,           "\
3438 toec(N) -> M: convert work factor to elliptic curve group order")
3439 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, "\
3440 " #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3441   METH_HDANCE(hsalsa20, "HSalsa20")
3442   METH_HDANCE(hsalsa2012, "HSalsa20/12")
3443   METH_HDANCE(hsalsa208, "HSalsa20/8")
3444   METH_HDANCE(hchacha20, "HChaCha20")
3445   METH_HDANCE(hchacha12, "HChaCha12")
3446   METH_HDANCE(hchacha8, "HChaCha8")
3447 #undef METH_DANCE
3448 #undef METHNAME
3449   { 0 }
3450 };
3451
3452 void algorithms_pyinit(void)
3453 {
3454   INITTYPE(keysz, root);
3455   INITTYPE(keyszany, keysz);
3456   INITTYPE(keyszrange, keysz);
3457   INITTYPE(keyszset, keysz);
3458   INITTYPE(gccipher, type);
3459   INITTYPE(gcipher, root);
3460   INITTYPE(gcaead, type);
3461   INITTYPE(gaeadkey, root);
3462   INITTYPE(gcaeadaad, type);
3463   INITTYPE(gaeadaad, root);
3464   INITTYPE(gcaeadenc, type);
3465   INITTYPE(gaeadenc, root);
3466   INITTYPE(gcaeaddec, type);
3467   INITTYPE(gaeaddec, root);
3468   INITTYPE(gchash, type);
3469   INITTYPE(ghash, root);
3470   INITTYPE(gcmac, type);
3471   INITTYPE(gmac, type);
3472   INITTYPE(gmhash, ghash);
3473   INITTYPE(poly1305cls, type);
3474   INITTYPE_META(poly1305key, type, poly1305cls);
3475   INITTYPE(poly1305hash, root);
3476   INITTYPE(kxvik, root);
3477   INITTYPE(shake, root);
3478   INITTYPE(shake128, shake);
3479   INITTYPE(shake256, shake);
3480   INITTYPE(gcprp, type);
3481   INITTYPE(gprp, root);
3482   addmethods(methods);
3483 }
3484
3485 GEN(gcciphers, cipher)
3486 GEN(gcaeads, aead)
3487 GEN(gchashes, hash)
3488 GEN(gcmacs, mac)
3489 #define gcprp prpinfo
3490 GEN(gcprps, prp)
3491
3492 void algorithms_pyinsert(PyObject *mod)
3493 {
3494   PyObject *d;
3495   INSERT("KeySZ", keysz_pytype);
3496   INSERT("KeySZAny", keyszany_pytype);
3497   INSERT("KeySZRange", keyszrange_pytype);
3498   INSERT("KeySZSet", keyszset_pytype);
3499   INSERT("GCCipher", gccipher_pytype);
3500   INSERT("GCipher", gcipher_pytype);
3501   INSERT("gcciphers", gcciphers());
3502   INSERT("GCAEAD", gcaead_pytype);
3503   INSERT("GAEKey", gaeadkey_pytype);
3504   INSERT("GAEAADClass", gcaeadaad_pytype);
3505   INSERT("GAEAAD", gaeadaad_pytype);
3506   INSERT("GAEEncClass", gcaeadenc_pytype);
3507   INSERT("GAEEnc", gaeadenc_pytype);
3508   INSERT("GAEDecClass", gcaeaddec_pytype);
3509   INSERT("GAEDec", gaeaddec_pytype);
3510   INSERT("gcaeads", gcaeads());
3511   INSERT("GCHash", gchash_pytype);
3512   INSERT("GHash", ghash_pytype);
3513   INSERT("gchashes", d = gchashes());
3514   sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3515   has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3516   INSERT("GCMAC", gcmac_pytype);
3517   INSERT("GMAC", gmac_pytype);
3518   INSERT("GMACHash", gmhash_pytype);
3519   INSERT("gcmacs", gcmacs());
3520   INSERT("Poly1305Class", poly1305cls_pytype);
3521   INSERT("poly1305", poly1305key_pytype);
3522   INSERT("Poly1305Hash", poly1305hash_pytype);
3523   INSERT("Keccak1600", kxvik_pytype);
3524   INSERT("Shake", shake_pytype);
3525   INSERT("Shake128", shake128_pytype);
3526   INSERT("Shake256", shake256_pytype);
3527   INSERT("GCPRP", gcprp_pytype);
3528   INSERT("GPRP", gprp_pytype);
3529   INSERT("gcprps", gcprps());
3530 }
3531
3532 /*----- That's all, folks -------------------------------------------------*/