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 #include "algorithms.h"
  31
  32 /*----- Key sizes ---------------------------------------------------------*/
  33
  34 PyTypeObject *keysz_pytype;
  35 PyTypeObject *keyszany_pytype, *keyszrange_pytype, *keyszset_pytype;
  36 PyObject *sha_pyobj, *has160_pyobj;
  37
  38 #ifndef KSZ_OPMASK
  39 #  define KSZ_OPMASK 0x1f
  40 #endif
  41
  42 #ifndef KSZ_16BIT
  43 #  define KSZ_16BIT 0x20
  44 #endif
  45
  46 PyObject *keysz_pywrap(const octet *k)
  47 {
  48   unsigned op = *k++;
  49 #define ARG(i) (op&KSZ_16BIT ? LOAD16(k + 2*(i)) : k[i])
  50   switch (op&KSZ_OPMASK) {
  51     case KSZ_ANY: {
  52       keysz_pyobj *o = PyObject_New(keysz_pyobj, keyszany_pytype);
  53       o->dfl = ARG(0);
  54       return ((PyObject *)o);
  55     } break;
  56     case KSZ_RANGE: {
  57       keyszrange_pyobj *o =
  58         PyObject_New(keyszrange_pyobj, keyszrange_pytype);
  59       o->dfl = ARG(0);
  60       o->min = ARG(1);
  61       o->max = ARG(2);
  62       o->mod = ARG(3);
  63       if (!o->mod) o->mod = 1;
  64       return ((PyObject *)o);
  65     } break;
  66     case KSZ_SET: {
  67       keyszset_pyobj *o =
  68         PyObject_New(keyszset_pyobj, keyszset_pytype);
  69       int i, n;
  70       o->dfl = ARG(0);
  71       for (i = 0; ARG(i); i++) ;
  72       n = i; o->set = PyTuple_New(n);
  73       for (i = 0; i < n; i++)
  74         PyTuple_SET_ITEM(o->set, i, PyInt_FromLong(ARG(i)));
  75       return ((PyObject *)o);
  76     } break;
  77     default:
  78       abort();
  79   }
  80 #undef ARG
  81 }
  82
  83 static PyObject *keyszany_pynew(PyTypeObject *ty,
  84                                 PyObject *arg, PyObject *kw)
  85 {
  86   static const char *const kwlist[] = { "default", 0 };
  87   int dfl;
  88   keysz_pyobj *o;
  89
  90   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", KWLIST, &dfl))
  91     goto end;
  92   if (dfl < 0) VALERR("key size cannot be negative");
  93   o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
  94   o->dfl = dfl;
  95   return ((PyObject *)o);
  96 end:
  97   return (0);
  98 }
  99
 100 static PyObject *keyszrange_pynew(PyTypeObject *ty,
 101                                   PyObject *arg, PyObject *kw)
 102 {
 103   static const char *const kwlist[] = { "default", "min", "max", "mod", 0 };
 104   int dfl, min = 0, max = 0, mod = 1;
 105   keyszrange_pyobj *o;
 106
 107   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iii:new", KWLIST,
 108                                    &dfl, &min, &max, &mod))
 109     goto end;
 110   if (dfl < 0 || min < 0) VALERR("key size cannot be negative");
 111   if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
 112   if (mod <= 0 || dfl%mod || min%mod || max%mod)
 113     VALERR("bad key size modulus");
 114   o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
 115   o->dfl = dfl;
 116   o->min = min;
 117   o->max = max;
 118   o->mod = mod;
 119   return ((PyObject *)o);
 120 end:
 121   return (0);
 122 }
 123
 124 static PyObject *keyszset_pynew(PyTypeObject *ty,
 125                                 PyObject *arg, PyObject *kw)
 126 {
 127   static const char *const kwlist[] = { "default", "set", 0 };
 128   int dfl, i, n, xx;
 129   PyObject *set = 0;
 130   PyObject *x = 0, *l = 0;
 131   keyszset_pyobj *o = 0;
 132
 133   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
 134     goto end;
 135   if (!set) set = PyTuple_New(0);
 136   else Py_INCREF(set);
 137   if (!PySequence_Check(set)) TYERR("want a sequence");
 138   n = PySequence_Size(set); if (n < 0) goto end;
 139   l = PyList_New(0); if (!l) goto end;
 140   if (dfl < 0) VALERR("key size cannot be negative");
 141   x = PyInt_FromLong(dfl);
 142   PyList_Append(l, x);
 143   Py_DECREF(x);
 144   x = 0;
 145   for (i = 0; i < n; i++) {
 146     if ((x = PySequence_GetItem(set, i)) == 0) goto end;
 147     xx = PyInt_AsLong(x);
 148     if (PyErr_Occurred()) goto end;
 149     if (xx == dfl) continue;
 150     if (xx < 0) VALERR("key size cannot be negative");
 151     PyList_Append(l, x);
 152     Py_DECREF(x);
 153     x = 0;
 154   }
 155   Py_DECREF(set);
 156   if ((set = PySequence_Tuple(l)) == 0) goto end;
 157   o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
 158   o->dfl = dfl;
 159   o->set = set;
 160   Py_INCREF(set);
 161 end:
 162   Py_XDECREF(set);
 163   Py_XDECREF(l);
 164   Py_XDECREF(x);
 165   return ((PyObject *)o);
 166 }
 167
 168 static PyObject *kaget_min(PyObject *me, void *hunoz)
 169   { return (PyInt_FromLong(0)); }
 170 #define kaget_max kaget_min
 171
 172 static PyObject *ksget_min(PyObject *me, void *hunoz)
 173 {
 174   PyObject *set = ((keyszset_pyobj *)me)->set;
 175   int i, n, y, x = -1;
 176   n = PyTuple_Size(set);
 177   for (i = 0; i < n; i++) {
 178     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 179     if (x == -1 || y < x) x = y;
 180   }
 181   return (PyInt_FromLong(x));
 182 }
 183
 184 static PyObject *ksget_max(PyObject *me, void *hunoz)
 185 {
 186   PyObject *set = ((keyszset_pyobj *)me)->set;
 187   int i, n, y, x = -1;
 188   n = PyTuple_Size(set);
 189   for (i = 0; i < n; i++) {
 190     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 191     if (y > x) x = y;
 192   }
 193   return (PyInt_FromLong(x));
 194 }
 195
 196 static PyMemberDef keysz_pymembers[] = {
 197 #define MEMBERSTRUCT keysz_pyobj
 198 #define default dfl /* ugh! */
 199   MEMBER(default, T_INT, READONLY, "KSZ.default -> default key size")
 200 #undef default
 201 #undef MEMBERSTRUCT
 202   { 0 }
 203 };
 204
 205 static PyGetSetDef keyszany_pygetset[] = {
 206 #define GETSETNAME(op, name) ka##op##_##name
 207   GET   (min,                   "KSZ.min -> smallest allowed key size")
 208   GET   (max,                   "KSZ.max -> largest allowed key size")
 209 #undef GETSETNAME
 210   { 0 }
 211 };
 212
 213 static PyMemberDef keyszrange_pymembers[] = {
 214 #define MEMBERSTRUCT keyszrange_pyobj
 215   MEMBER(min, T_INT, READONLY,  "KSZ.min -> smallest allowed key size")
 216   MEMBER(max, T_INT, READONLY,  "KSZ.max -> largest allowed key size")
 217   MEMBER(mod, T_INT, READONLY,
 218          "KSZ.mod -> key size must be a multiple of this")
 219 #undef MEMBERSTRUCT
 220   { 0 }
 221 };
 222
 223 static PyGetSetDef keyszset_pygetset[] = {
 224 #define GETSETNAME(op, name) ks##op##_##name
 225   GET   (min,                   "KSZ.min -> smallest allowed key size")
 226   GET   (max,                   "KSZ.max -> largest allowed key size")
 227 #undef GETSETNAME
 228   { 0 }
 229 };
 230
 231 static PyMemberDef keyszset_pymembers[] = {
 232 #define MEMBERSTRUCT keyszset_pyobj
 233   MEMBER(set, T_OBJECT, READONLY,       "KSZ.set -> allowed key sizes")
 234 #undef MEMBERSTRUCT
 235   { 0 }
 236 };
 237
 238 static PyTypeObject keysz_pytype_skel = {
 239   PyObject_HEAD_INIT(0) 0,              /* Header */
 240   "KeySZ",                              /* @tp_name@ */
 241   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 242   0,                                    /* @tp_itemsize@ */
 243
 244   0,                                    /* @tp_dealloc@ */
 245   0,                                    /* @tp_print@ */
 246   0,                                    /* @tp_getattr@ */
 247   0,                                    /* @tp_setattr@ */
 248   0,                                    /* @tp_compare@ */
 249   0,                                    /* @tp_repr@ */
 250   0,                                    /* @tp_as_number@ */
 251   0,                                    /* @tp_as_sequence@ */
 252   0,                                    /* @tp_as_mapping@ */
 253   0,                                    /* @tp_hash@ */
 254   0,                                    /* @tp_call@ */
 255   0,                                    /* @tp_str@ */
 256   0,                                    /* @tp_getattro@ */
 257   0,                                    /* @tp_setattro@ */
 258   0,                                    /* @tp_as_buffer@ */
 259   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 260     Py_TPFLAGS_BASETYPE,
 261
 262   /* @tp_doc@ */
 263 "Key size constraints.  Abstract.",
 264
 265   0,                                    /* @tp_traverse@ */
 266   0,                                    /* @tp_clear@ */
 267   0,                                    /* @tp_richcompare@ */
 268   0,                                    /* @tp_weaklistoffset@ */
 269   0,                                    /* @tp_iter@ */
 270   0,                                    /* @tp_iternext@ */
 271   0,                                    /* @tp_methods@ */
 272   keysz_pymembers,                      /* @tp_members@ */
 273   0,                                    /* @tp_getset@ */
 274   0,                                    /* @tp_base@ */
 275   0,                                    /* @tp_dict@ */
 276   0,                                    /* @tp_descr_get@ */
 277   0,                                    /* @tp_descr_set@ */
 278   0,                                    /* @tp_dictoffset@ */
 279   0,                                    /* @tp_init@ */
 280   PyType_GenericAlloc,                  /* @tp_alloc@ */
 281   abstract_pynew,                       /* @tp_new@ */
 282   0,                                    /* @tp_free@ */
 283   0                                     /* @tp_is_gc@ */
 284 };
 285
 286 static PyTypeObject keyszany_pytype_skel = {
 287   PyObject_HEAD_INIT(0) 0,              /* Header */
 288   "KeySZAny",                           /* @tp_name@ */
 289   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 290   0,                                    /* @tp_itemsize@ */
 291
 292   0,                                    /* @tp_dealloc@ */
 293   0,                                    /* @tp_print@ */
 294   0,                                    /* @tp_getattr@ */
 295   0,                                    /* @tp_setattr@ */
 296   0,                                    /* @tp_compare@ */
 297   0,                                    /* @tp_repr@ */
 298   0,                                    /* @tp_as_number@ */
 299   0,                                    /* @tp_as_sequence@ */
 300   0,                                    /* @tp_as_mapping@ */
 301   0,                                    /* @tp_hash@ */
 302   0,                                    /* @tp_call@ */
 303   0,                                    /* @tp_str@ */
 304   0,                                    /* @tp_getattro@ */
 305   0,                                    /* @tp_setattro@ */
 306   0,                                    /* @tp_as_buffer@ */
 307   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 308     Py_TPFLAGS_BASETYPE,
 309
 310   /* @tp_doc@ */
 311 "KeySZAny(DEFAULT)\n\
 312   Key size constraints.  This object imposes no constraints on size.",
 313
 314   0,                                    /* @tp_traverse@ */
 315   0,                                    /* @tp_clear@ */
 316   0,                                    /* @tp_richcompare@ */
 317   0,                                    /* @tp_weaklistoffset@ */
 318   0,                                    /* @tp_iter@ */
 319   0,                                    /* @tp_iternext@ */
 320   0,                                    /* @tp_methods@ */
 321   0,                                    /* @tp_members@ */
 322   keyszany_pygetset,                    /* @tp_getset@ */
 323   0,                                    /* @tp_base@ */
 324   0,                                    /* @tp_dict@ */
 325   0,                                    /* @tp_descr_get@ */
 326   0,                                    /* @tp_descr_set@ */
 327   0,                                    /* @tp_dictoffset@ */
 328   0,                                    /* @tp_init@ */
 329   PyType_GenericAlloc,                  /* @tp_alloc@ */
 330   keyszany_pynew,                       /* @tp_new@ */
 331   0,                                    /* @tp_free@ */
 332   0                                     /* @tp_is_gc@ */
 333 };
 334
 335 static PyTypeObject keyszrange_pytype_skel = {
 336   PyObject_HEAD_INIT(0) 0,              /* Header */
 337   "KeySZRange",                         /* @tp_name@ */
 338   sizeof(keyszrange_pyobj),             /* @tp_basicsize@ */
 339   0,                                    /* @tp_itemsize@ */
 340
 341   0,                                    /* @tp_dealloc@ */
 342   0,                                    /* @tp_print@ */
 343   0,                                    /* @tp_getattr@ */
 344   0,                                    /* @tp_setattr@ */
 345   0,                                    /* @tp_compare@ */
 346   0,                                    /* @tp_repr@ */
 347   0,                                    /* @tp_as_number@ */
 348   0,                                    /* @tp_as_sequence@ */
 349   0,                                    /* @tp_as_mapping@ */
 350   0,                                    /* @tp_hash@ */
 351   0,                                    /* @tp_call@ */
 352   0,                                    /* @tp_str@ */
 353   0,                                    /* @tp_getattro@ */
 354   0,                                    /* @tp_setattro@ */
 355   0,                                    /* @tp_as_buffer@ */
 356   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 357     Py_TPFLAGS_BASETYPE,
 358
 359   /* @tp_doc@ */
 360 "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n\
 361   Key size constraints.  Key size must be between MIN and MAX inclusive,\n\
 362   and be a multiple of MOD.",
 363
 364   0,                                    /* @tp_traverse@ */
 365   0,                                    /* @tp_clear@ */
 366   0,                                    /* @tp_richcompare@ */
 367   0,                                    /* @tp_weaklistoffset@ */
 368   0,                                    /* @tp_iter@ */
 369   0,                                    /* @tp_iternext@ */
 370   0,                                    /* @tp_methods@ */
 371   keyszrange_pymembers,                 /* @tp_members@ */
 372   0,                                    /* @tp_getset@ */
 373   0,                                    /* @tp_base@ */
 374   0,                                    /* @tp_dict@ */
 375   0,                                    /* @tp_descr_get@ */
 376   0,                                    /* @tp_descr_set@ */
 377   0,                                    /* @tp_dictoffset@ */
 378   0,                                    /* @tp_init@ */
 379   PyType_GenericAlloc,                  /* @tp_alloc@ */
 380   keyszrange_pynew,                     /* @tp_new@ */
 381   0,                                    /* @tp_free@ */
 382   0                                     /* @tp_is_gc@ */
 383 };
 384
 385 static PyTypeObject keyszset_pytype_skel = {
 386   PyObject_HEAD_INIT(0) 0,              /* Header */
 387   "KeySZSet",                           /* @tp_name@ */
 388   sizeof(keyszset_pyobj),               /* @tp_basicsize@ */
 389   0,                                    /* @tp_itemsize@ */
 390
 391   0,                                    /* @tp_dealloc@ */
 392   0,                                    /* @tp_print@ */
 393   0,                                    /* @tp_getattr@ */
 394   0,                                    /* @tp_setattr@ */
 395   0,                                    /* @tp_compare@ */
 396   0,                                    /* @tp_repr@ */
 397   0,                                    /* @tp_as_number@ */
 398   0,                                    /* @tp_as_sequence@ */
 399   0,                                    /* @tp_as_mapping@ */
 400   0,                                    /* @tp_hash@ */
 401   0,                                    /* @tp_call@ */
 402   0,                                    /* @tp_str@ */
 403   0,                                    /* @tp_getattro@ */
 404   0,                                    /* @tp_setattro@ */
 405   0,                                    /* @tp_as_buffer@ */
 406   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 407     Py_TPFLAGS_BASETYPE,
 408
 409   /* @tp_doc@ */
 410 "KeySZSet(DEFAULT, SEQ)\n\
 411   Key size constraints.  Key size must be DEFAULT or one in SEQ.",
 412
 413   0,                                    /* @tp_traverse@ */
 414   0,                                    /* @tp_clear@ */
 415   0,                                    /* @tp_richcompare@ */
 416   0,                                    /* @tp_weaklistoffset@ */
 417   0,                                    /* @tp_iter@ */
 418   0,                                    /* @tp_iternext@ */
 419   0,                                    /* @tp_methods@ */
 420   keyszset_pymembers,                   /* @tp_members@ */
 421   keyszset_pygetset,                    /* @tp_getset@ */
 422   0,                                    /* @tp_base@ */
 423   0,                                    /* @tp_dict@ */
 424   0,                                    /* @tp_descr_get@ */
 425   0,                                    /* @tp_descr_set@ */
 426   0,                                    /* @tp_dictoffset@ */
 427   0,                                    /* @tp_init@ */
 428   PyType_GenericAlloc,                  /* @tp_alloc@ */
 429   keyszset_pynew,                       /* @tp_new@ */
 430   0,                                    /* @tp_free@ */
 431   0                                     /* @tp_is_gc@ */
 432 };
 433
 434 #define KSZCONVOP(op)                                                   \
 435   static PyObject *meth__KeySZ_##op(PyObject *me, PyObject *arg)        \
 436   {                                                                     \
 437     double x, y;                                                        \
 438     if (!PyArg_ParseTuple(arg, "Od:" #op, &me, &x)) return (0);         \
 439     y = keysz_##op(x);                                                  \
 440     return (PyFloat_FromDouble(y));                                     \
 441   }
 442 KSZCONVOP(fromdl)
 443 KSZCONVOP(fromschnorr)
 444 KSZCONVOP(fromif)
 445 KSZCONVOP(fromec)
 446 KSZCONVOP(todl)
 447 KSZCONVOP(toschnorr)
 448 KSZCONVOP(toif)
 449 KSZCONVOP(toec)
 450 #undef KSZCONVOP
 451
 452 /*----- Symmetric encryption ----------------------------------------------*/
 453
 454 PyTypeObject *gccipher_pytype, *gcipher_pytype;
 455
 456 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
 457 CONVFUNC(gcipher, gcipher *, GCIPHER_C)
 458
 459 PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
 460 {
 461   gcipher_pyobj *g;
 462   if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
 463   else Py_INCREF(cobj);
 464   g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
 465   g->c = c;
 466   return ((PyObject *)g);
 467 }
 468
 469 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 470 {
 471   static const char *const kwlist[] = { "k", 0 };
 472   char *k;
 473   Py_ssize_t sz;
 474
 475   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
 476     goto end;
 477   if (keysz(sz, GCCIPHER_CC(ty)->keysz) != sz) VALERR("bad key length");
 478   return (gcipher_pywrap((PyObject *)ty,
 479                          GC_INIT(GCCIPHER_CC(ty), k, sz)));
 480 end:
 481   return (0);
 482 }
 483
 484 PyObject *gccipher_pywrap(gccipher *cc)
 485 {
 486   gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
 487   g->cc = cc;
 488   g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
 489   g->ty.ht_type.tp_base = gcipher_pytype;
 490   Py_INCREF(gcipher_pytype);
 491   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 492                             Py_TPFLAGS_BASETYPE |
 493                             Py_TPFLAGS_HEAPTYPE);
 494   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 495   g->ty.ht_type.tp_free = 0;
 496   g->ty.ht_type.tp_new = gcipher_pynew;
 497   typeready(&g->ty.ht_type);
 498   return ((PyObject *)g);
 499 }
 500
 501 static void gcipher_pydealloc(PyObject *me)
 502 {
 503   GC_DESTROY(GCIPHER_C(me));
 504   Py_DECREF(me->ob_type);
 505   FREEOBJ(me);
 506 }
 507
 508 static PyObject *gccget_name(PyObject *me, void *hunoz)
 509   { return (PyString_FromString(GCCIPHER_CC(me)->name)); }
 510
 511 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
 512   { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
 513
 514 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
 515   { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
 516
 517 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
 518 {
 519   char *p;
 520   Py_ssize_t sz;
 521   PyObject *rc = 0;
 522
 523   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &sz)) return (0);
 524   rc = bytestring_pywrap(0, sz);
 525   GC_ENCRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 526   return (rc);
 527 }
 528
 529 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
 530 {
 531   char *p;
 532   int sz;
 533   PyObject *rc = 0;
 534
 535   if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
 536   rc = bytestring_pywrap(0, sz);
 537   p = PyString_AS_STRING(rc);
 538   memset(p, 0, sz);
 539   GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
 540   return (rc);
 541 }
 542
 543 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
 544 {
 545   char *p;
 546   Py_ssize_t sz;
 547   PyObject *rc = 0;
 548
 549   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &sz)) return (0);
 550   rc = bytestring_pywrap(0, sz);
 551   GC_DECRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 552   return (rc);
 553 }
 554
 555 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
 556 {
 557   char *p;
 558   int sz;
 559   PyObject *rc = 0;
 560
 561   if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
 562   rc = bytestring_pywrap(0, sz);
 563   p = PyString_AS_STRING(rc);
 564   memset(p, 0, sz);
 565   GC_DECRYPT(GCIPHER_C(me), p, p, sz);
 566   return (rc);
 567 }
 568
 569 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
 570 {
 571   char *p;
 572   Py_ssize_t sz;
 573
 574   if (!PyArg_ParseTuple(arg, "s#:setiv", &p, &sz)) goto end;
 575   if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
 576   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 577   if (sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
 578   GC_SETIV(GCIPHER_C(me), p);
 579   RETURN_ME;
 580 end:
 581   return (0);
 582 }
 583
 584 static PyObject *gcmeth_bdry(PyObject *me, PyObject *arg)
 585 {
 586   if (!PyArg_ParseTuple(arg, ":bdry")) goto end;
 587   if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
 588   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 589   GC_BDRY(GCIPHER_C(me));
 590   RETURN_ME;
 591 end:
 592   return (0);
 593 }
 594
 595 static PyGetSetDef gccipher_pygetset[] = {
 596 #define GETSETNAME(op, name) gcc##op##_##name
 597   GET   (keysz,                 "CC.keysz -> acceptable key sizes")
 598   GET   (blksz,                 "CC.blksz -> block size, or zero")
 599   GET   (name,                  "CC.name -> name of this kind of cipher")
 600 #undef GETSETNAME
 601   { 0 }
 602 };
 603
 604 static PyMethodDef gcipher_pymethods[] = {
 605 #define METHNAME(name) gcmeth_##name
 606   METH  (encrypt,               "C.encrypt(PT) -> CT")
 607   METH  (enczero,               "C.enczero(N) -> CT")
 608   METH  (decrypt,               "C.decrypt(CT) -> PT")
 609   METH  (deczero,               "C.deczero(N) -> PT")
 610   METH  (setiv,                 "C.setiv(IV)")
 611   METH  (bdry,                  "C.bdry()")
 612 #undef METHNAME
 613   { 0 }
 614 };
 615
 616 static PyTypeObject gccipher_pytype_skel = {
 617   PyObject_HEAD_INIT(0) 0,              /* Header */
 618   "GCCipher",                           /* @tp_name@ */
 619   sizeof(gccipher_pyobj),               /* @tp_basicsize@ */
 620   0,                                    /* @tp_itemsize@ */
 621
 622   0,                                    /* @tp_dealloc@ */
 623   0,                                    /* @tp_print@ */
 624   0,                                    /* @tp_getattr@ */
 625   0,                                    /* @tp_setattr@ */
 626   0,                                    /* @tp_compare@ */
 627   0,                                    /* @tp_repr@ */
 628   0,                                    /* @tp_as_number@ */
 629   0,                                    /* @tp_as_sequence@ */
 630   0,                                    /* @tp_as_mapping@ */
 631   0,                                    /* @tp_hash@ */
 632   0,                                    /* @tp_call@ */
 633   0,                                    /* @tp_str@ */
 634   0,                                    /* @tp_getattro@ */
 635   0,                                    /* @tp_setattro@ */
 636   0,                                    /* @tp_as_buffer@ */
 637   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 638     Py_TPFLAGS_BASETYPE,
 639
 640   /* @tp_doc@ */
 641 "Symmetric cipher metaclass.",
 642
 643   0,                                    /* @tp_traverse@ */
 644   0,                                    /* @tp_clear@ */
 645   0,                                    /* @tp_richcompare@ */
 646   0,                                    /* @tp_weaklistoffset@ */
 647   0,                                    /* @tp_iter@ */
 648   0,                                    /* @tp_iternext@ */
 649   0,                                    /* @tp_methods@ */
 650   0,                                    /* @tp_members@ */
 651   gccipher_pygetset,                    /* @tp_getset@ */
 652   0,                                    /* @tp_base@ */
 653   0,                                    /* @tp_dict@ */
 654   0,                                    /* @tp_descr_get@ */
 655   0,                                    /* @tp_descr_set@ */
 656   0,                                    /* @tp_dictoffset@ */
 657   0,                                    /* @tp_init@ */
 658   PyType_GenericAlloc,                  /* @tp_alloc@ */
 659   abstract_pynew,                       /* @tp_new@ */
 660   0,                                    /* @tp_free@ */
 661   0                                     /* @tp_is_gc@ */
 662 };
 663
 664 static PyTypeObject gcipher_pytype_skel = {
 665   PyObject_HEAD_INIT(0) 0,              /* Header */
 666   "GCipher",                            /* @tp_name@ */
 667   sizeof(gcipher_pyobj),                /* @tp_basicsize@ */
 668   0,                                    /* @tp_itemsize@ */
 669
 670   gcipher_pydealloc,                    /* @tp_dealloc@ */
 671   0,                                    /* @tp_print@ */
 672   0,                                    /* @tp_getattr@ */
 673   0,                                    /* @tp_setattr@ */
 674   0,                                    /* @tp_compare@ */
 675   0,                                    /* @tp_repr@ */
 676   0,                                    /* @tp_as_number@ */
 677   0,                                    /* @tp_as_sequence@ */
 678   0,                                    /* @tp_as_mapping@ */
 679   0,                                    /* @tp_hash@ */
 680   0,                                    /* @tp_call@ */
 681   0,                                    /* @tp_str@ */
 682   0,                                    /* @tp_getattro@ */
 683   0,                                    /* @tp_setattro@ */
 684   0,                                    /* @tp_as_buffer@ */
 685   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 686     Py_TPFLAGS_BASETYPE,
 687
 688   /* @tp_doc@ */
 689 "Symmetric cipher, abstract base class.",
 690
 691   0,                                    /* @tp_traverse@ */
 692   0,                                    /* @tp_clear@ */
 693   0,                                    /* @tp_richcompare@ */
 694   0,                                    /* @tp_weaklistoffset@ */
 695   0,                                    /* @tp_iter@ */
 696   0,                                    /* @tp_iternext@ */
 697   gcipher_pymethods,                    /* @tp_methods@ */
 698   0,                                    /* @tp_members@ */
 699   0,                                    /* @tp_getset@ */
 700   0,                                    /* @tp_base@ */
 701   0,                                    /* @tp_dict@ */
 702   0,                                    /* @tp_descr_get@ */
 703   0,                                    /* @tp_descr_set@ */
 704   0,                                    /* @tp_dictoffset@ */
 705   0,                                    /* @tp_init@ */
 706   PyType_GenericAlloc,                  /* @tp_alloc@ */
 707   abstract_pynew,                       /* @tp_new@ */
 708   0,                                    /* @tp_free@ */
 709   0                                     /* @tp_is_gc@ */
 710 };
 711
 712 /*----- Authenticated encryption ------------------------------------------*/
 713
 714 PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
 715 PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
 716 PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
 717 PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
 718
 719 CONVFUNC(gcaead, gcaead *, GCAEAD_AEC)
 720 CONVFUNC(gaeadkey, gaead_key *, GAEADKEY_K)
 721
 722 PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
 723 {
 724   gaeadkey_pyobj *gk;
 725
 726   if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
 727   else Py_INCREF(cobj);
 728   gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
 729   gk->k = k;
 730   return ((PyObject *)gk);
 731 }
 732
 733 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
 734                                 PyObject *arg, PyObject *kw)
 735 {
 736   static const char *const kwlist[] = { "k", 0 };
 737   char *k;
 738   Py_ssize_t sz;
 739
 740   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
 741     goto end;
 742   if (keysz(sz, GCAEAD_AEC(ty)->keysz) != sz) VALERR("bad key length");
 743   return (gaeadkey_pywrap((PyObject *)ty,
 744                           GAEAD_KEY(GCAEAD_AEC(ty), k, sz)));
 745 end:
 746   return (0);
 747 }
 748
 749 PyObject *gcaead_pywrap(gcaead *aec)
 750 {
 751   gcaead_pyobj *gck;
 752   gcaeadaad_pyobj *gca;
 753   gcaeadenc_pyobj *gce;
 754   gcaeaddec_pyobj *gcd;
 755
 756 #define MKTYPE(obj, thing, newfn, namefmt) do {                         \
 757   (obj) = newtype(gcaead_pytype, 0, 0);                                 \
 758   (obj)->ty.ht_name = PyString_FromFormat(namefmt, aec->name);          \
 759   (obj)->ty.ht_type.tp_name = PyString_AS_STRING((obj)->ty.ht_name);    \
 760   (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj);        \
 761   (obj)->ty.ht_type.tp_base = gaead##thing##_pytype;                    \
 762   Py_INCREF(gaead##thing##_pytype);                                     \
 763   (obj)->ty.ht_type.tp_flags =                                          \
 764     (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE);   \
 765   (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc;                     \
 766   (obj)->ty.ht_type.tp_free = 0;                                        \
 767   (obj)->ty.ht_type.tp_new = newfn;                                     \
 768   typeready(&(obj)->ty.ht_type);                                        \
 769 } while (0)
 770
 771   MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
 772   MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
 773   MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
 774   MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
 775
 776 #undef MKTYPE
 777
 778   gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
 779   gca->key = gce->key = gcd->key = gck;
 780   return ((PyObject *)gck);
 781 }
 782
 783 static void gaeadkey_pydealloc(PyObject *me)
 784   { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(me->ob_type); FREEOBJ(me); }
 785
 786 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
 787   { return (PyString_FromString(GCAEAD_AEC(me)->name)); }
 788
 789 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
 790   { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
 791
 792 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
 793   { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
 794
 795 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
 796   { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
 797
 798 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
 799   { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
 800
 801 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
 802   { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
 803
 804 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
 805   { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
 806
 807 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
 808   { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
 809
 810 static PyGetSetDef gcaead_pygetset[] = {
 811 #define GETSETNAME(op, name) gcae##op##_##name
 812   GET   (keysz,                 "AEC.keysz -> acceptable key sizes")
 813   GET   (noncesz,               "AEC.noncesz -> acceptable nonce sizes")
 814   GET   (tagsz,                 "AEC.tagsz -> acceptable tag sizes")
 815   GET   (blksz,                 "AEC.blksz -> block size, or zero")
 816   GET   (bufsz,                 "AEC.bufsz -> amount of data buffered internally")
 817   GET   (ohd,                   "AEC.ohd -> maximum encryption overhead")
 818   GET   (name,                  "AEC.name -> name of this kind of AEAD scheme")
 819   GET   (flags,                 "AEC.flags -> mask of `AEADF_...' flags")
 820 #undef GETSETNAME
 821   { 0 }
 822 };
 823
 824 static PyObject *gaekmeth_aad(PyObject *me, PyObject *arg)
 825 {
 826   const gaead_key *k = GAEADKEY_K(me);
 827   PyObject *rc = 0;
 828
 829   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
 830   if (k->ops->c->f&AEADF_AADNDEP)
 831     VALERR("aad must be associated with enc/dec op");
 832   rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(me->ob_type),
 833                        GAEAD_AAD(k), 0, 0);
 834 end:
 835   return (rc);
 836 }
 837
 838 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
 839                              PyObject *hszobj, size_t *hsz_out,
 840                              PyObject *mszobj, size_t *msz_out,
 841                              PyObject *tszobj, size_t *tsz_out)
 842 {
 843   unsigned f = 0, miss;
 844   int rc = -1;
 845
 846   if (hszobj != Py_None)
 847     { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
 848   if (mszobj != Py_None)
 849     { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
 850   if (tszobj != Py_None)
 851     { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
 852   miss = aec->f&~f;
 853   if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
 854   if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
 855   if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
 856   if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
 857   if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
 858     VALERR("bad tag length");
 859   *f_out = f | aec->f; rc = 0;
 860 end:
 861   return (rc);
 862 }
 863
 864 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
 865 {
 866   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
 867   const gaead_key *k = GAEADKEY_K(me);
 868   gaead_enc *e;
 869   PyObject *rc = 0;
 870   char *n; Py_ssize_t nsz;
 871   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
 872   size_t hsz = 0, msz = 0, tsz = 0;
 873   unsigned f;
 874
 875   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
 876                                    &n, &nsz, &hszobj, &mszobj, &tszobj))
 877     goto end;
 878   if (check_aead_encdec(k->ops->c, &f, nsz,
 879                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
 880     goto end;
 881   e = GAEAD_ENC(GAEADKEY_K(me), n, nsz, hsz, msz, tsz);
 882   if (!e) VALERR("bad aead parameter combination");
 883   rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(me->ob_type),
 884                        e, f, hsz, msz, tsz);
 885 end:
 886   return (rc);
 887 }
 888
 889 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
 890 {
 891   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
 892   const gaead_key *k = GAEADKEY_K(me);
 893   gaead_dec *d;
 894   PyObject *rc = 0;
 895   char *n; Py_ssize_t nsz;
 896   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
 897   size_t hsz = 0, csz = 0, tsz = 0;
 898   unsigned f;
 899
 900   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:dec", KWLIST,
 901                                    &n, &nsz, &hszobj, &cszobj, &tszobj))
 902     goto end;
 903   if (check_aead_encdec(k->ops->c, &f, nsz,
 904                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
 905     goto end;
 906   d = GAEAD_DEC(GAEADKEY_K(me), n, nsz, hsz, csz, tsz);
 907   if (!d) VALERR("bad aead parameter combination");
 908   rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(me->ob_type),
 909                        d, f, hsz, csz, tsz);
 910 end:
 911   return (rc);
 912 }
 913
 914 static PyMethodDef gaeadkey_pymethods[] = {
 915 #define METHNAME(name) gaekmeth_##name
 916   METH  (aad,                   "KEY.aad() -> AAD")
 917   KWMETH(enc,                   "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
 918   KWMETH(dec,                   "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
 919 #undef METHNAME
 920   { 0 }
 921 };
 922
 923 PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
 924                           unsigned f, size_t hsz)
 925 {
 926   gaeadaad_pyobj *ga;
 927
 928   assert(cobj); Py_INCREF(cobj);
 929   ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
 930   ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
 931   return ((PyObject *)ga);
 932 }
 933
 934 static void gaeadaad_pydealloc(PyObject *me)
 935 {
 936   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
 937
 938   if (ga->a) GAEAD_DESTROY(ga->a);
 939   Py_DECREF(me->ob_type); FREEOBJ(me);
 940 }
 941
 942 static int gaea_check(PyObject *me)
 943 {
 944   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
 945   int rc = -1;
 946
 947   if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
 948   rc = 0;
 949 end:
 950   return (rc);
 951 }
 952
 953 static void gaea_invalidate(gaeadaad_pyobj *ga)
 954   { if (ga) ga->f |= AEADF_DEAD; }
 955
 956 static void gaea_sever(gaeadaad_pyobj **ga_inout)
 957 {
 958   gaeadaad_pyobj *ga = *ga_inout;
 959   if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
 960 }
 961
 962 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
 963 {
 964   if (gaea_check(me)) return (0);
 965   else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
 966   else RETURN_NONE;
 967 }
 968
 969 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
 970   { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
 971
 972 static PyGetSetDef gaeadaad_pygetset[] = {
 973 #define GETSETNAME(op, name) gaea##op##_##name
 974   GET   (hsz,                   "AAD.hsz -> precommitted header length or `None'")
 975   GET   (hlen,                  "AAD.hlen -> header length so far")
 976 #undef GETSETNAME
 977   { 0 }
 978 };
 979
 980 static PyObject *gaeameth_copy(PyObject *me, PyObject *arg)
 981 {
 982   PyObject *rc = 0;
 983
 984   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
 985   if (gaea_check(me)) goto end;
 986   if (GAEADAAD_F(me)&AEADF_AADNDEP)
 987     VALERR("can't duplicate nonce-dependent aad");
 988   rc = gaeadaad_pywrap((PyObject *)me->ob_type,
 989                        GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
 990 end:
 991   return (rc);
 992 }
 993
 994 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
 995 {
 996   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
 997   int rc = -1;
 998
 999   if (gaea_check(me)) goto end;
1000   if ((ga->f&AEADF_NOAAD) && hsz)
1001     VALERR("header data not permitted");
1002   if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1003     VALERR("too large for precommitted header length");
1004   GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1005   rc = 0;
1006 end:
1007   return (rc);
1008 }
1009
1010
1011 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1012 {
1013   char *h; Py_ssize_t hsz;
1014
1015   if (!PyArg_ParseTuple(arg, "s#:hash", &h, &hsz)) return (0);
1016   if (gaeadaad_hash(me, h, hsz)) return (0);
1017   RETURN_ME;
1018 }
1019
1020 #define GAEAMETH_HASHU_(n, W, w)                                        \
1021   static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg)       \
1022   {                                                                     \
1023     uint##n x; octet b[SZ_##W];                                         \
1024     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1025     STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0);    \
1026     RETURN_ME;                                                          \
1027   }
1028 DOUINTCONV(GAEAMETH_HASHU_)
1029
1030 #define GAEAMETH_HASHBUF_(n, W, w)                                      \
1031   static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg)     \
1032   {                                                                     \
1033     char *p; Py_ssize_t sz; octet b[SZ_##W];                            \
1034     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
1035     if (sz > MASK##n) TYERR("string too long");                         \
1036     STORE##W(b, sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end;     \
1037     if (gaeadaad_hash(me, p, sz)) goto end;                             \
1038     RETURN_ME;                                                          \
1039   end:                                                                  \
1040     return (0);                                                         \
1041   }
1042 DOUINTCONV(GAEAMETH_HASHBUF_)
1043
1044 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1045 {
1046   char *p;
1047   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1048   if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1049   RETURN_ME;
1050 }
1051
1052 static PyMethodDef gaeadaad_pymethods[] = {
1053 #define METHNAME(name) gaeameth_##name
1054   METH  (copy,                  "AAD.copy() -> AAD'")
1055   METH  (hash,                  "AAD.hash(H)")
1056 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1057   DOUINTCONV(METHU_)
1058 #undef METHU_
1059 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1060   DOUINTCONV(METHBUF_)
1061 #undef METHBUF_
1062   METH  (hashstrz,              "AAD.hashstrz(STRING)")
1063 #undef METHNAME
1064   { 0 }
1065 };
1066
1067 PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1068                           size_t hsz, size_t msz, size_t tsz)
1069 {
1070   gaeadenc_pyobj *ge;
1071
1072   assert(cobj); Py_INCREF(cobj);
1073   ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1074   ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1075   ge->aad = 0; ge->mlen = 0;
1076   return ((PyObject *)ge);
1077 }
1078
1079 static void gaeadenc_pydealloc(PyObject *me)
1080 {
1081   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1082
1083   gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1084   Py_DECREF(me->ob_type); FREEOBJ(me);
1085 }
1086
1087 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1088 {
1089   if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1090   else RETURN_NONE;
1091 }
1092
1093 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1094 {
1095   if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1096   else RETURN_NONE;
1097 }
1098
1099 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1100 {
1101   if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1102   else RETURN_NONE;
1103 }
1104
1105 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1106   { return getulong(GAEADENC_MLEN(me)); }
1107
1108 static PyGetSetDef gaeadenc_pygetset[] = {
1109 #define GETSETNAME(op, name) gaee##op##_##name
1110   GET   (hsz,                   "ENC.hsz -> precommitted header length or `None'")
1111   GET   (msz,                   "ENC.msz -> precommitted message length or `None'")
1112   GET   (tsz,                   "ENC.tsz -> precommitted tag length or `None'")
1113   GET   (mlen,                  "ENC.mlen -> message length so far")
1114 #undef GETSETNAME
1115   { 0 }
1116 };
1117
1118 static PyObject *gaeemeth_aad(PyObject *me, PyObject *arg)
1119 {
1120   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1121   PyObject *rc = 0;
1122
1123   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1124   if (!(ge->f&AEADF_AADNDEP))
1125     rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1126                          GAEAD_AAD(ge->e), 0, 0);
1127   else {
1128     if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1129       VALERR("too late for aad");
1130     if (!ge->aad)
1131       ge->aad = (gaeadaad_pyobj *)
1132         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1133                         GAEAD_AAD(ge->e), ge->f&AEADF_PCHSZ, ge->hsz);
1134     Py_INCREF(ge->aad);
1135     rc = (PyObject *)ge->aad;
1136   }
1137 end:
1138   return (rc);
1139 }
1140
1141 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1142 {
1143   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1144   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1145   char *n; Py_ssize_t nsz;
1146   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1147   size_t hsz = 0, msz = 0, tsz = 0;
1148   unsigned f;
1149
1150   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1151                                    &n, &nsz, &hszobj, &mszobj, &tszobj))
1152     goto end;
1153   if (check_aead_encdec(ge->e->ops->c, &f, nsz,
1154                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1155     goto end;
1156   if (GAEAD_REINIT(ge->e, n, nsz, hsz, msz, tsz))
1157     VALERR("bad aead parameter combination");
1158   gaea_sever(&ge->aad);
1159   ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1160 end:
1161   return (0);
1162 }
1163
1164 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1165 {
1166   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1167   char *m; Py_ssize_t msz;
1168   char *c = 0; size_t csz; buf b;
1169   int err;
1170   PyObject *rc = 0;
1171
1172   if (!PyArg_ParseTuple(arg, "s#:encrypt", &m, &msz)) goto end;
1173   if (ge->f&AEADF_AADFIRST) {
1174     if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1175       VALERR("header doesn't match precommitted length");
1176     gaea_invalidate(ge->aad);
1177   }
1178   if ((ge->f&AEADF_PCMSZ) && msz > ge->msz - ge->mlen)
1179     VALERR("too large for precommitted message length");
1180   csz = msz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1181   err = GAEAD_ENCRYPT(ge->e, m, msz, &b); assert(!err); (void)err;
1182   buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += msz;
1183 end:
1184   xfree(c);
1185   return (rc);
1186 }
1187
1188 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1189 {
1190   static const char *const kwlist[] = { "tsz", "aad", 0 };
1191   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1192   PyObject *aad = Py_None;
1193   char *c = 0; size_t csz; buf b;
1194   PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1195   int err;
1196   PyObject *rc = 0;
1197
1198   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1199                                    &tszobj, &aad))
1200     goto end;
1201   if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1202   if (aad != Py_None &&
1203       !PyObject_TypeCheck(aad,
1204                           (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1205     TYERR("wanted aad");
1206   if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1207     VALERR("mismatched aad");
1208   if ((ge->f&AEADF_PCHSZ) &&
1209       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1210     VALERR("header doesn't match precommitted length");
1211   if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1212     VALERR("message doesn't match precommitted length");
1213   if (tszobj == Py_None) {
1214     if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1215     else tsz = keysz(0, ge->e->ops->c->tagsz);
1216   } else {
1217     if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1218       VALERR("tag length doesn't match precommitted value");
1219     if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1220   }
1221   csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1222   tag = bytestring_pywrap(0, tsz);
1223   err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1224                    PyString_AS_STRING(tag), tsz);
1225   assert(!err); (void)err;
1226   buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1227 end:
1228   xfree(c);
1229   return (rc);
1230 }
1231
1232 static PyMethodDef gaeadenc_pymethods[] = {
1233 #define METHNAME(name) gaeemeth_##name
1234   METH  (aad,                   "ENC.aad() -> AAD")
1235   KWMETH(reinit,                "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1236   METH  (encrypt,               "ENC.encrypt(MSG) -> CT")
1237   KWMETH(done,                  "ENC.done([tsz], [aad]) -> CT, TAG")
1238 #undef METHNAME
1239   { 0 }
1240 };
1241
1242 PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1243                           size_t hsz, size_t csz, size_t tsz)
1244 {
1245   gaeaddec_pyobj *gd;
1246   assert(cobj); Py_INCREF(cobj);
1247   gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1248   gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1249   gd->aad = 0; gd->clen = 0;
1250   return ((PyObject *)gd);
1251 }
1252
1253 static void gaeaddec_pydealloc(PyObject *me)
1254 {
1255   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1256
1257   gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1258   Py_DECREF(me->ob_type); FREEOBJ(me);
1259 }
1260
1261 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1262 {
1263   if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1264   else RETURN_NONE;
1265 }
1266
1267 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1268 {
1269   if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1270   else RETURN_NONE;
1271 }
1272
1273 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1274 {
1275   if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1276   else RETURN_NONE;
1277 }
1278
1279 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1280   { return getulong(GAEADDEC_CLEN(me)); }
1281
1282 static PyGetSetDef gaeaddec_pygetset[] = {
1283 #define GETSETNAME(op, name) gaed##op##_##name
1284   GET   (hsz,                   "DEC.hsz -> precommitted header length or `None'")
1285   GET   (csz,                   "DEC.csz -> precommitted ciphertext length or `None'")
1286   GET   (tsz,                   "DEC.tsz -> precommitted tag length or `None'")
1287   GET   (clen,                  "DEC.clen -> ciphertext length so far")
1288 #undef GETSETNAME
1289   { 0 }
1290 };
1291
1292 static PyObject *gaedmeth_aad(PyObject *me, PyObject *arg)
1293 {
1294   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1295
1296   if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1297   if (!(gd->f&AEADF_AADNDEP))
1298     return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(gd->ob_type)->aad,
1299                             GAEAD_AAD(gd->d), 0, 0));
1300   else {
1301     if (!gd->aad)
1302       gd->aad = (gaeadaad_pyobj *)
1303         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(gd->ob_type)->aad,
1304                         GAEAD_AAD(gd->d), gd->f&AEADF_PCHSZ, gd->hsz);
1305     Py_INCREF(gd->aad);
1306     return ((PyObject *)gd->aad);
1307   }
1308 }
1309
1310 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1311 {
1312   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1313   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1314   char *n; Py_ssize_t nsz;
1315   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1316   size_t hsz = 0, csz = 0, tsz = 0;
1317   unsigned f;
1318
1319   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1320                                    &n, &nsz, &hszobj, &cszobj, &tszobj))
1321     goto end;
1322   if (check_aead_encdec(gd->d->ops->c, &f, nsz,
1323                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1324     goto end;
1325   if (GAEAD_REINIT(gd->d, n, nsz, hsz, csz, tsz))
1326     VALERR("bad aead parameter combination");
1327   gaea_sever(&gd->aad);
1328   gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1329 end:
1330   return (0);
1331 }
1332
1333 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1334 {
1335   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1336   char *c; Py_ssize_t csz;
1337   char *m = 0; size_t msz; buf b;
1338   int err;
1339   PyObject *rc = 0;
1340
1341   if (!PyArg_ParseTuple(arg, "s#:decrypt", &c, &csz)) goto end;
1342   if (gd->f&AEADF_AADFIRST) {
1343     if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1344       VALERR("header doesn't match precommitted length");
1345     gaea_invalidate(gd->aad);
1346   }
1347   if ((gd->f&AEADF_PCMSZ) && csz > gd->csz - gd->clen)
1348     VALERR("too large for precommitted message length");
1349   msz = csz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1350   err = GAEAD_DECRYPT(gd->d, c, csz, &b); assert(!err); (void)err;
1351   buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += csz;
1352 end:
1353   xfree(m);
1354   return (rc);
1355 }
1356
1357 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1358 {
1359   static const char *const kwlist[] = { "tag", "aad", 0 };
1360   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1361   PyObject *aad = Py_None;
1362   char *t; Py_ssize_t tsz;
1363   char *m = 0; size_t msz; buf b;
1364   int err;
1365   PyObject *rc = 0;
1366
1367   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O:done", KWLIST,
1368                                    &t, &tsz, &aad))
1369     goto end;
1370   if (aad != Py_None &&
1371       !PyObject_TypeCheck(aad,
1372                           (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1373     TYERR("wanted aad");
1374   if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1375     VALERR("mismatched aad");
1376   if ((gd->f&AEADF_PCHSZ) &&
1377       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1378     VALERR("header doesn't match precommitted length");
1379   if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1380     VALERR("message doesn't match precommitted length");
1381   if ((gd->f&AEADF_PCTSZ) && tsz != gd->tsz)
1382     VALERR("tag length doesn't match precommitted value");
1383   if (keysz(tsz, gd->d->ops->c->tagsz) != tsz) VALERR("bad tag length");
1384   msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1385   err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad), &b, t, tsz);
1386   assert(err >= 0);
1387   if (!err) VALERR("decryption failed");
1388   buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1389 end:
1390   xfree(m);
1391   return (rc);
1392 }
1393
1394 static PyMethodDef gaeaddec_pymethods[] = {
1395 #define METHNAME(name) gaedmeth_##name
1396   METH  (aad,                   "DEC.aad() -> AAD")
1397   KWMETH(reinit,                "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1398   METH  (decrypt,               "DEC.decrypt(CT) -> MSG")
1399   KWMETH(done,                  "DEC.done(TAG, [aad]) -> MSG | None")
1400 #undef METHNAME
1401   { 0 }
1402 };
1403
1404 static PyTypeObject gcaead_pytype_skel = {
1405   PyObject_HEAD_INIT(0) 0,              /* Header */
1406   "GCAEAD",                             /* @tp_name@ */
1407   sizeof(gcaead_pyobj),                 /* @tp_basicsize@ */
1408   0,                                    /* @tp_itemsize@ */
1409
1410   0,                                    /* @tp_dealloc@ */
1411   0,                                    /* @tp_print@ */
1412   0,                                    /* @tp_getattr@ */
1413   0,                                    /* @tp_setattr@ */
1414   0,                                    /* @tp_compare@ */
1415   0,                                    /* @tp_repr@ */
1416   0,                                    /* @tp_as_number@ */
1417   0,                                    /* @tp_as_sequence@ */
1418   0,                                    /* @tp_as_mapping@ */
1419   0,                                    /* @tp_hash@ */
1420   0,                                    /* @tp_call@ */
1421   0,                                    /* @tp_str@ */
1422   0,                                    /* @tp_getattro@ */
1423   0,                                    /* @tp_setattro@ */
1424   0,                                    /* @tp_as_buffer@ */
1425   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1426     Py_TPFLAGS_BASETYPE,
1427
1428   /* @tp_doc@ */
1429 "Authenticated encryption (key) metaclass.",
1430
1431   0,                                    /* @tp_traverse@ */
1432   0,                                    /* @tp_clear@ */
1433   0,                                    /* @tp_richcompare@ */
1434   0,                                    /* @tp_weaklistoffset@ */
1435   0,                                    /* @tp_iter@ */
1436   0,                                    /* @tp_iternext@ */
1437   0,                                    /* @tp_methods@ */
1438   0,                                    /* @tp_members@ */
1439   gcaead_pygetset,                      /* @tp_getset@ */
1440   0,                                    /* @tp_base@ */
1441   0,                                    /* @tp_dict@ */
1442   0,                                    /* @tp_descr_get@ */
1443   0,                                    /* @tp_descr_set@ */
1444   0,                                    /* @tp_dictoffset@ */
1445   0,                                    /* @tp_init@ */
1446   PyType_GenericAlloc,                  /* @tp_alloc@ */
1447   abstract_pynew,                       /* @tp_new@ */
1448   0,                                    /* @tp_free@ */
1449   0                                     /* @tp_is_gc@ */
1450 };
1451
1452 static PyTypeObject gaeadkey_pytype_skel = {
1453   PyObject_HEAD_INIT(0) 0,              /* Header */
1454   "GAEKey",                             /* @tp_name@ */
1455   sizeof(gaeadkey_pyobj),               /* @tp_basicsize@ */
1456   0,                                    /* @tp_itemsize@ */
1457
1458   gaeadkey_pydealloc,                   /* @tp_dealloc@ */
1459   0,                                    /* @tp_print@ */
1460   0,                                    /* @tp_getattr@ */
1461   0,                                    /* @tp_setattr@ */
1462   0,                                    /* @tp_compare@ */
1463   0,                                    /* @tp_repr@ */
1464   0,                                    /* @tp_as_number@ */
1465   0,                                    /* @tp_as_sequence@ */
1466   0,                                    /* @tp_as_mapping@ */
1467   0,                                    /* @tp_hash@ */
1468   0,                                    /* @tp_call@ */
1469   0,                                    /* @tp_str@ */
1470   0,                                    /* @tp_getattro@ */
1471   0,                                    /* @tp_setattro@ */
1472   0,                                    /* @tp_as_buffer@ */
1473   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1474     Py_TPFLAGS_BASETYPE,
1475
1476   /* @tp_doc@ */
1477 "Authenticated encryption key.",
1478
1479   0,                                    /* @tp_traverse@ */
1480   0,                                    /* @tp_clear@ */
1481   0,                                    /* @tp_richcompare@ */
1482   0,                                    /* @tp_weaklistoffset@ */
1483   0,                                    /* @tp_iter@ */
1484   0,                                    /* @tp_iternext@ */
1485   gaeadkey_pymethods,                   /* @tp_methods@ */
1486   0,                                    /* @tp_members@ */
1487   0,                                    /* @tp_getset@ */
1488   0,                                    /* @tp_base@ */
1489   0,                                    /* @tp_dict@ */
1490   0,                                    /* @tp_descr_get@ */
1491   0,                                    /* @tp_descr_set@ */
1492   0,                                    /* @tp_dictoffset@ */
1493   0,                                    /* @tp_init@ */
1494   PyType_GenericAlloc,                  /* @tp_alloc@ */
1495   abstract_pynew,                       /* @tp_new@ */
1496   0,                                    /* @tp_free@ */
1497   0                                     /* @tp_is_gc@ */
1498 };
1499
1500 static PyTypeObject gcaeadaad_pytype_skel = {
1501   PyObject_HEAD_INIT(0) 0,              /* Header */
1502   "GAEAADClass",                        /* @tp_name@ */
1503   sizeof(gcaeadaad_pyobj),              /* @tp_basicsize@ */
1504   0,                                    /* @tp_itemsize@ */
1505
1506   0,                                    /* @tp_dealloc@ */
1507   0,                                    /* @tp_print@ */
1508   0,                                    /* @tp_getattr@ */
1509   0,                                    /* @tp_setattr@ */
1510   0,                                    /* @tp_compare@ */
1511   0,                                    /* @tp_repr@ */
1512   0,                                    /* @tp_as_number@ */
1513   0,                                    /* @tp_as_sequence@ */
1514   0,                                    /* @tp_as_mapping@ */
1515   0,                                    /* @tp_hash@ */
1516   0,                                    /* @tp_call@ */
1517   0,                                    /* @tp_str@ */
1518   0,                                    /* @tp_getattro@ */
1519   0,                                    /* @tp_setattro@ */
1520   0,                                    /* @tp_as_buffer@ */
1521   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1522     Py_TPFLAGS_BASETYPE,
1523
1524   /* @tp_doc@ */
1525 "Authenticated encryption additional-data hash metaclass.",
1526
1527   0,                                    /* @tp_traverse@ */
1528   0,                                    /* @tp_clear@ */
1529   0,                                    /* @tp_richcompare@ */
1530   0,                                    /* @tp_weaklistoffset@ */
1531   0,                                    /* @tp_iter@ */
1532   0,                                    /* @tp_iternext@ */
1533   0,                                    /* @tp_methods@ */
1534   0,                                    /* @tp_members@ */
1535   0,                                    /* @tp_getset@ */
1536   0,                                    /* @tp_base@ */
1537   0,                                    /* @tp_dict@ */
1538   0,                                    /* @tp_descr_get@ */
1539   0,                                    /* @tp_descr_set@ */
1540   0,                                    /* @tp_dictoffset@ */
1541   0,                                    /* @tp_init@ */
1542   PyType_GenericAlloc,                  /* @tp_alloc@ */
1543   abstract_pynew,                       /* @tp_new@ */
1544   0,                                    /* @tp_free@ */
1545   0                                     /* @tp_is_gc@ */
1546 };
1547
1548 static PyTypeObject gaeadaad_pytype_skel = {
1549   PyObject_HEAD_INIT(0) 0,              /* Header */
1550   "GAEAAD",                             /* @tp_name@ */
1551   sizeof(gaeadaad_pyobj),               /* @tp_basicsize@ */
1552   0,                                    /* @tp_itemsize@ */
1553
1554   gaeadaad_pydealloc,                   /* @tp_dealloc@ */
1555   0,                                    /* @tp_print@ */
1556   0,                                    /* @tp_getattr@ */
1557   0,                                    /* @tp_setattr@ */
1558   0,                                    /* @tp_compare@ */
1559   0,                                    /* @tp_repr@ */
1560   0,                                    /* @tp_as_number@ */
1561   0,                                    /* @tp_as_sequence@ */
1562   0,                                    /* @tp_as_mapping@ */
1563   0,                                    /* @tp_hash@ */
1564   0,                                    /* @tp_call@ */
1565   0,                                    /* @tp_str@ */
1566   0,                                    /* @tp_getattro@ */
1567   0,                                    /* @tp_setattro@ */
1568   0,                                    /* @tp_as_buffer@ */
1569   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1570     Py_TPFLAGS_BASETYPE,
1571
1572   /* @tp_doc@ */
1573 "Authenticated encryption AAD hash.",
1574
1575   0,                                    /* @tp_traverse@ */
1576   0,                                    /* @tp_clear@ */
1577   0,                                    /* @tp_richcompare@ */
1578   0,                                    /* @tp_weaklistoffset@ */
1579   0,                                    /* @tp_iter@ */
1580   0,                                    /* @tp_iternext@ */
1581   gaeadaad_pymethods,                   /* @tp_methods@ */
1582   0,                                    /* @tp_members@ */
1583   gaeadaad_pygetset,                    /* @tp_getset@ */
1584   0,                                    /* @tp_base@ */
1585   0,                                    /* @tp_dict@ */
1586   0,                                    /* @tp_descr_get@ */
1587   0,                                    /* @tp_descr_set@ */
1588   0,                                    /* @tp_dictoffset@ */
1589   0,                                    /* @tp_init@ */
1590   PyType_GenericAlloc,                  /* @tp_alloc@ */
1591   abstract_pynew,                       /* @tp_new@ */
1592   0,                                    /* @tp_free@ */
1593   0                                     /* @tp_is_gc@ */
1594 };
1595
1596 static PyTypeObject gcaeadenc_pytype_skel = {
1597   PyObject_HEAD_INIT(0) 0,              /* Header */
1598   "GAEEncClass",                        /* @tp_name@ */
1599   sizeof(gcaeadenc_pyobj),              /* @tp_basicsize@ */
1600   0,                                    /* @tp_itemsize@ */
1601
1602   0,                                    /* @tp_dealloc@ */
1603   0,                                    /* @tp_print@ */
1604   0,                                    /* @tp_getattr@ */
1605   0,                                    /* @tp_setattr@ */
1606   0,                                    /* @tp_compare@ */
1607   0,                                    /* @tp_repr@ */
1608   0,                                    /* @tp_as_number@ */
1609   0,                                    /* @tp_as_sequence@ */
1610   0,                                    /* @tp_as_mapping@ */
1611   0,                                    /* @tp_hash@ */
1612   0,                                    /* @tp_call@ */
1613   0,                                    /* @tp_str@ */
1614   0,                                    /* @tp_getattro@ */
1615   0,                                    /* @tp_setattro@ */
1616   0,                                    /* @tp_as_buffer@ */
1617   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1618     Py_TPFLAGS_BASETYPE,
1619
1620   /* @tp_doc@ */
1621 "Authenticated encryption operation metaclass.",
1622
1623   0,                                    /* @tp_traverse@ */
1624   0,                                    /* @tp_clear@ */
1625   0,                                    /* @tp_richcompare@ */
1626   0,                                    /* @tp_weaklistoffset@ */
1627   0,                                    /* @tp_iter@ */
1628   0,                                    /* @tp_iternext@ */
1629   0,                                    /* @tp_methods@ */
1630   0,                                    /* @tp_members@ */
1631   0,                                    /* @tp_getset@ */
1632   0,                                    /* @tp_base@ */
1633   0,                                    /* @tp_dict@ */
1634   0,                                    /* @tp_descr_get@ */
1635   0,                                    /* @tp_descr_set@ */
1636   0,                                    /* @tp_dictoffset@ */
1637   0,                                    /* @tp_init@ */
1638   PyType_GenericAlloc,                  /* @tp_alloc@ */
1639   abstract_pynew,                       /* @tp_new@ */
1640   0,                                    /* @tp_free@ */
1641   0                                     /* @tp_is_gc@ */
1642 };
1643
1644 static PyTypeObject gaeadenc_pytype_skel = {
1645   PyObject_HEAD_INIT(0) 0,              /* Header */
1646   "GAEEnc",                             /* @tp_name@ */
1647   sizeof(gaeadenc_pyobj),               /* @tp_basicsize@ */
1648   0,                                    /* @tp_itemsize@ */
1649
1650   gaeadenc_pydealloc,                   /* @tp_dealloc@ */
1651   0,                                    /* @tp_print@ */
1652   0,                                    /* @tp_getattr@ */
1653   0,                                    /* @tp_setattr@ */
1654   0,                                    /* @tp_compare@ */
1655   0,                                    /* @tp_repr@ */
1656   0,                                    /* @tp_as_number@ */
1657   0,                                    /* @tp_as_sequence@ */
1658   0,                                    /* @tp_as_mapping@ */
1659   0,                                    /* @tp_hash@ */
1660   0,                                    /* @tp_call@ */
1661   0,                                    /* @tp_str@ */
1662   0,                                    /* @tp_getattro@ */
1663   0,                                    /* @tp_setattro@ */
1664   0,                                    /* @tp_as_buffer@ */
1665   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1666     Py_TPFLAGS_BASETYPE,
1667
1668   /* @tp_doc@ */
1669 "Authenticated encryption operation.",
1670
1671   0,                                    /* @tp_traverse@ */
1672   0,                                    /* @tp_clear@ */
1673   0,                                    /* @tp_richcompare@ */
1674   0,                                    /* @tp_weaklistoffset@ */
1675   0,                                    /* @tp_iter@ */
1676   0,                                    /* @tp_iternext@ */
1677   gaeadenc_pymethods,                   /* @tp_methods@ */
1678   0,                                    /* @tp_members@ */
1679   gaeadenc_pygetset,                    /* @tp_getset@ */
1680   0,                                    /* @tp_base@ */
1681   0,                                    /* @tp_dict@ */
1682   0,                                    /* @tp_descr_get@ */
1683   0,                                    /* @tp_descr_set@ */
1684   0,                                    /* @tp_dictoffset@ */
1685   0,                                    /* @tp_init@ */
1686   PyType_GenericAlloc,                  /* @tp_alloc@ */
1687   abstract_pynew,                       /* @tp_new@ */
1688   0,                                    /* @tp_free@ */
1689   0                                     /* @tp_is_gc@ */
1690 };
1691
1692 static PyTypeObject gcaeaddec_pytype_skel = {
1693   PyObject_HEAD_INIT(0) 0,              /* Header */
1694   "GAEDecClass",                        /* @tp_name@ */
1695   sizeof(gcaeaddec_pyobj),              /* @tp_basicsize@ */
1696   0,                                    /* @tp_itemsize@ */
1697
1698   0,                                    /* @tp_dealloc@ */
1699   0,                                    /* @tp_print@ */
1700   0,                                    /* @tp_getattr@ */
1701   0,                                    /* @tp_setattr@ */
1702   0,                                    /* @tp_compare@ */
1703   0,                                    /* @tp_repr@ */
1704   0,                                    /* @tp_as_number@ */
1705   0,                                    /* @tp_as_sequence@ */
1706   0,                                    /* @tp_as_mapping@ */
1707   0,                                    /* @tp_hash@ */
1708   0,                                    /* @tp_call@ */
1709   0,                                    /* @tp_str@ */
1710   0,                                    /* @tp_getattro@ */
1711   0,                                    /* @tp_setattro@ */
1712   0,                                    /* @tp_as_buffer@ */
1713   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1714     Py_TPFLAGS_BASETYPE,
1715
1716   /* @tp_doc@ */
1717 "Authenticated decryption operation metaclass.",
1718
1719   0,                                    /* @tp_traverse@ */
1720   0,                                    /* @tp_clear@ */
1721   0,                                    /* @tp_richcompare@ */
1722   0,                                    /* @tp_weaklistoffset@ */
1723   0,                                    /* @tp_iter@ */
1724   0,                                    /* @tp_iternext@ */
1725   0,                                    /* @tp_methods@ */
1726   0,                                    /* @tp_members@ */
1727   0,                                    /* @tp_getset@ */
1728   0,                                    /* @tp_base@ */
1729   0,                                    /* @tp_dict@ */
1730   0,                                    /* @tp_descr_get@ */
1731   0,                                    /* @tp_descr_set@ */
1732   0,                                    /* @tp_dictoffset@ */
1733   0,                                    /* @tp_init@ */
1734   PyType_GenericAlloc,                  /* @tp_alloc@ */
1735   abstract_pynew,                       /* @tp_new@ */
1736   0,                                    /* @tp_free@ */
1737   0                                     /* @tp_is_gc@ */
1738 };
1739
1740 static PyTypeObject gaeaddec_pytype_skel = {
1741   PyObject_HEAD_INIT(0) 0,              /* Header */
1742   "GAEDec",                             /* @tp_name@ */
1743   sizeof(gaeaddec_pyobj),               /* @tp_basicsize@ */
1744   0,                                    /* @tp_itemsize@ */
1745
1746   gaeaddec_pydealloc,                   /* @tp_dealloc@ */
1747   0,                                    /* @tp_print@ */
1748   0,                                    /* @tp_getattr@ */
1749   0,                                    /* @tp_setattr@ */
1750   0,                                    /* @tp_compare@ */
1751   0,                                    /* @tp_repr@ */
1752   0,                                    /* @tp_as_number@ */
1753   0,                                    /* @tp_as_sequence@ */
1754   0,                                    /* @tp_as_mapping@ */
1755   0,                                    /* @tp_hash@ */
1756   0,                                    /* @tp_call@ */
1757   0,                                    /* @tp_str@ */
1758   0,                                    /* @tp_getattro@ */
1759   0,                                    /* @tp_setattro@ */
1760   0,                                    /* @tp_as_buffer@ */
1761   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1762     Py_TPFLAGS_BASETYPE,
1763
1764   /* @tp_doc@ */
1765 "Authenticated decryption operation.",
1766
1767   0,                                    /* @tp_traverse@ */
1768   0,                                    /* @tp_clear@ */
1769   0,                                    /* @tp_richcompare@ */
1770   0,                                    /* @tp_weaklistoffset@ */
1771   0,                                    /* @tp_iter@ */
1772   0,                                    /* @tp_iternext@ */
1773   gaeaddec_pymethods,                   /* @tp_methods@ */
1774   0,                                    /* @tp_members@ */
1775   gaeaddec_pygetset,                    /* @tp_getset@ */
1776   0,                                    /* @tp_base@ */
1777   0,                                    /* @tp_dict@ */
1778   0,                                    /* @tp_descr_get@ */
1779   0,                                    /* @tp_descr_set@ */
1780   0,                                    /* @tp_dictoffset@ */
1781   0,                                    /* @tp_init@ */
1782   PyType_GenericAlloc,                  /* @tp_alloc@ */
1783   abstract_pynew,                       /* @tp_new@ */
1784   0,                                    /* @tp_free@ */
1785   0                                     /* @tp_is_gc@ */
1786 };
1787
1788 /*----- Hash functions ----------------------------------------------------*/
1789
1790 PyTypeObject *gchash_pytype, *ghash_pytype;
1791
1792 CONVFUNC(gchash, gchash *, GCHASH_CH)
1793 CONVFUNC(ghash, ghash *, GHASH_H)
1794
1795 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1796 {
1797   static const char *const kwlist[] = { 0 };
1798   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1799     goto end;
1800   return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1801 end:
1802   return (0);
1803 }
1804
1805 PyObject *gchash_pywrap(gchash *ch)
1806 {
1807   gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1808   g->ch = ch;
1809   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1810   g->ty.ht_type.tp_base = ghash_pytype;
1811   Py_INCREF(ghash_pytype);
1812   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1813                             Py_TPFLAGS_BASETYPE |
1814                             Py_TPFLAGS_HEAPTYPE);
1815   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1816   g->ty.ht_type.tp_free = 0;
1817   g->ty.ht_type.tp_new = ghash_pynew;
1818   typeready(&g->ty.ht_type);
1819   return ((PyObject *)g);
1820 }
1821
1822 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1823 {
1824   ghash_pyobj *g;
1825   if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1826   else Py_INCREF(cobj);
1827   g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1828   g->h = h;
1829   return ((PyObject *)g);
1830 }
1831
1832 static void ghash_pydealloc(PyObject *me)
1833 {
1834   GH_DESTROY(GHASH_H(me));
1835   Py_DECREF(me->ob_type);
1836   FREEOBJ(me);
1837 }
1838
1839 static PyObject *gchget_name(PyObject *me, void *hunoz)
1840   { return (PyString_FromString(GCHASH_CH(me)->name)); }
1841
1842 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
1843   { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
1844
1845 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
1846   { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
1847
1848 static PyObject *ghmeth_copy(PyObject *me, PyObject *arg)
1849 {
1850   if (!PyArg_ParseTuple(arg, ":copy")) return (0);
1851   return (ghash_pywrap((PyObject *)me->ob_type, GH_COPY(GHASH_H(me))));
1852 }
1853
1854 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
1855 {
1856   char *p;
1857   Py_ssize_t sz;
1858   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
1859   GH_HASH(GHASH_H(me), p, sz);
1860   RETURN_ME;
1861 }
1862
1863 #define GHMETH_HASHU_(n, W, w)                                          \
1864   static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg)         \
1865   {                                                                     \
1866     uint##n x;                                                          \
1867     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1868     GH_HASHU##W(GHASH_H(me), x);                                        \
1869     RETURN_ME;                                                          \
1870   }
1871 DOUINTCONV(GHMETH_HASHU_)
1872
1873 #define GHMETH_HASHBUF_(n, W, w)                                        \
1874   static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg)       \
1875   {                                                                     \
1876     char *p;                                                            \
1877     Py_ssize_t sz;                                                      \
1878     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
1879     if (sz > MASK##n) TYERR("string too long");                         \
1880     GH_HASHBUF##W(GHASH_H(me), p, sz);                                  \
1881     RETURN_ME;                                                          \
1882   end:                                                                  \
1883     return (0);                                                         \
1884   }
1885 DOUINTCONV(GHMETH_HASHBUF_)
1886
1887 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
1888 {
1889   char *p;
1890   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1891   GH_HASHSTRZ(GHASH_H(me), p);
1892   RETURN_ME;
1893 }
1894
1895 static PyObject *ghmeth_done(PyObject *me, PyObject *arg)
1896 {
1897   ghash *g;
1898   PyObject *rc;
1899   if (!PyArg_ParseTuple(arg, ":done")) return (0);
1900   g = GH_COPY(GHASH_H(me));
1901   rc = bytestring_pywrap(0, g->ops->c->hashsz);
1902   GH_DONE(g, PyString_AS_STRING(rc));
1903   GH_DESTROY(g);
1904   return (rc);
1905 }
1906
1907 static PyGetSetDef gchash_pygetset[] = {
1908 #define GETSETNAME(op, name) gch##op##_##name
1909   GET   (bufsz,                 "CH.bufsz -> hash buffer size, or zero")
1910   GET   (hashsz,                "CH.hashsz -> hash output size")
1911   GET   (name,                  "CH.name -> name of this kind of hash")
1912 #undef GETSETNAME
1913   { 0 }
1914 };
1915
1916 static PyMethodDef ghash_pymethods[] = {
1917 #define METHNAME(name) ghmeth_##name
1918   METH  (copy,                  "H.copy() -> HH")
1919   METH  (hash,                  "H.hash(M)")
1920 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
1921   DOUINTCONV(METHU_)
1922 #undef METHU_
1923 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
1924   DOUINTCONV(METHBUF_)
1925 #undef METHBUF_
1926   METH  (hashstrz,              "H.hashstrz(STRING)")
1927   METH  (done,                  "H.done() -> HASH")
1928 #undef METHNAME
1929   { 0 }
1930 };
1931
1932 static PyTypeObject gchash_pytype_skel = {
1933   PyObject_HEAD_INIT(0) 0,              /* Header */
1934   "GCHash",                             /* @tp_name@ */
1935   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
1936   0,                                    /* @tp_itemsize@ */
1937
1938   0,                                    /* @tp_dealloc@ */
1939   0,                                    /* @tp_print@ */
1940   0,                                    /* @tp_getattr@ */
1941   0,                                    /* @tp_setattr@ */
1942   0,                                    /* @tp_compare@ */
1943   0,                                    /* @tp_repr@ */
1944   0,                                    /* @tp_as_number@ */
1945   0,                                    /* @tp_as_sequence@ */
1946   0,                                    /* @tp_as_mapping@ */
1947   0,                                    /* @tp_hash@ */
1948   0,                                    /* @tp_call@ */
1949   0,                                    /* @tp_str@ */
1950   0,                                    /* @tp_getattro@ */
1951   0,                                    /* @tp_setattro@ */
1952   0,                                    /* @tp_as_buffer@ */
1953   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1954     Py_TPFLAGS_BASETYPE,
1955
1956   /* @tp_doc@ */
1957 "Hash function metaclass.",
1958
1959   0,                                    /* @tp_traverse@ */
1960   0,                                    /* @tp_clear@ */
1961   0,                                    /* @tp_richcompare@ */
1962   0,                                    /* @tp_weaklistoffset@ */
1963   0,                                    /* @tp_iter@ */
1964   0,                                    /* @tp_iternext@ */
1965   0,                                    /* @tp_methods@ */
1966   0,                                    /* @tp_members@ */
1967   gchash_pygetset,                      /* @tp_getset@ */
1968   0,                                    /* @tp_base@ */
1969   0,                                    /* @tp_dict@ */
1970   0,                                    /* @tp_descr_get@ */
1971   0,                                    /* @tp_descr_set@ */
1972   0,                                    /* @tp_dictoffset@ */
1973   0,                                    /* @tp_init@ */
1974   PyType_GenericAlloc,                  /* @tp_alloc@ */
1975   abstract_pynew,                       /* @tp_new@ */
1976   0,                                    /* @tp_free@ */
1977   0                                     /* @tp_is_gc@ */
1978 };
1979
1980 static PyTypeObject ghash_pytype_skel = {
1981   PyObject_HEAD_INIT(0) 0,              /* Header */
1982   "GHash",                              /* @tp_name@ */
1983   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
1984   0,                                    /* @tp_itemsize@ */
1985
1986   ghash_pydealloc,                      /* @tp_dealloc@ */
1987   0,                                    /* @tp_print@ */
1988   0,                                    /* @tp_getattr@ */
1989   0,                                    /* @tp_setattr@ */
1990   0,                                    /* @tp_compare@ */
1991   0,                                    /* @tp_repr@ */
1992   0,                                    /* @tp_as_number@ */
1993   0,                                    /* @tp_as_sequence@ */
1994   0,                                    /* @tp_as_mapping@ */
1995   0,                                    /* @tp_hash@ */
1996   0,                                    /* @tp_call@ */
1997   0,                                    /* @tp_str@ */
1998   0,                                    /* @tp_getattro@ */
1999   0,                                    /* @tp_setattro@ */
2000   0,                                    /* @tp_as_buffer@ */
2001   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2002     Py_TPFLAGS_BASETYPE,
2003
2004   /* @tp_doc@ */
2005 "Hash function, abstract base class.",
2006
2007   0,                                    /* @tp_traverse@ */
2008   0,                                    /* @tp_clear@ */
2009   0,                                    /* @tp_richcompare@ */
2010   0,                                    /* @tp_weaklistoffset@ */
2011   0,                                    /* @tp_iter@ */
2012   0,                                    /* @tp_iternext@ */
2013   ghash_pymethods,                      /* @tp_methods@ */
2014   0,                                    /* @tp_members@ */
2015   0,                                    /* @tp_getset@ */
2016   0,                                    /* @tp_base@ */
2017   0,                                    /* @tp_dict@ */
2018   0,                                    /* @tp_descr_get@ */
2019   0,                                    /* @tp_descr_set@ */
2020   0,                                    /* @tp_dictoffset@ */
2021   0,                                    /* @tp_init@ */
2022   PyType_GenericAlloc,                  /* @tp_alloc@ */
2023   abstract_pynew,                       /* @tp_new@ */
2024   0,                                    /* @tp_free@ */
2025   0                                     /* @tp_is_gc@ */
2026 };
2027
2028 /*----- Message authentication --------------------------------------------*/
2029
2030 PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2031
2032 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2033 CONVFUNC(gmac, gmac *, GMAC_M)
2034 CONVFUNC(gmhash, ghash *, GHASH_H)
2035
2036 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2037 {
2038   static const char *const kwlist[] = { "k", 0 };
2039   char *k;
2040   Py_ssize_t sz;
2041
2042   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2043     goto end;
2044   if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
2045   return (gmac_pywrap((PyObject *)ty,
2046                       GM_KEY(GCMAC_CM(ty), k, sz)));
2047 end:
2048   return (0);
2049 }
2050
2051 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2052 {
2053   static const char *const kwlist[] = { 0 };
2054   ghash_pyobj *g;
2055
2056   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2057   g = PyObject_NEW(ghash_pyobj, ty);
2058   g->h = GM_INIT(GMAC_M(ty));
2059   Py_INCREF(ty);
2060   return ((PyObject *)g);
2061 }
2062
2063 PyObject *gcmac_pywrap(gcmac *cm)
2064 {
2065   gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2066   g->cm = cm;
2067   g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2068   g->ty.ht_type.tp_base = gmac_pytype;
2069   Py_INCREF(gmac_pytype);
2070   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2071                             Py_TPFLAGS_BASETYPE |
2072                             Py_TPFLAGS_HEAPTYPE);
2073   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2074   g->ty.ht_type.tp_free = 0;
2075   g->ty.ht_type.tp_new = gmac_pynew;
2076   typeready(&g->ty.ht_type);
2077   return ((PyObject *)g);
2078 }
2079
2080 PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2081 {
2082   gmac_pyobj *g;
2083   if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2084   else Py_INCREF(cobj);
2085   g = newtype((PyTypeObject *)cobj, 0, 0);
2086   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2087   g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
2088   g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
2089   g->ty.ht_type.tp_base = gmhash_pytype;
2090   Py_INCREF(gmac_pytype);
2091   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2092                             Py_TPFLAGS_BASETYPE |
2093                             Py_TPFLAGS_HEAPTYPE);
2094   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2095   g->ty.ht_type.tp_free = 0;
2096   g->ty.ht_type.tp_new = gmhash_pynew;
2097   typeready(&g->ty.ht_type);
2098   g->m = m;
2099   return ((PyObject *)g);
2100 }
2101
2102 static void gmac_pydealloc(PyObject *me)
2103 {
2104   GM_DESTROY(GMAC_M(me));
2105   Py_DECREF(me->ob_type);
2106   PyType_Type.tp_dealloc(me);
2107 }
2108
2109 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2110   { return (PyString_FromString(GCMAC_CM(me)->name)); }
2111
2112 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2113   { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2114
2115 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2116   { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2117
2118 static PyGetSetDef gcmac_pygetset[] = {
2119 #define GETSETNAME(op, name) gcm##op##_##name
2120   GET   (keysz,                 "CM.keysz -> acceptable key sizes")
2121   GET   (tagsz,                 "CM.tagsz -> MAC output size")
2122   GET   (name,                  "CM.name -> name of this kind of MAC")
2123 #undef GETSETNAME
2124   { 0 }
2125 };
2126
2127 static PyTypeObject gcmac_pytype_skel = {
2128   PyObject_HEAD_INIT(0) 0,              /* Header */
2129   "GCMAC",                              /* @tp_name@ */
2130   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2131   0,                                    /* @tp_itemsize@ */
2132
2133   0,                                    /* @tp_dealloc@ */
2134   0,                                    /* @tp_print@ */
2135   0,                                    /* @tp_getattr@ */
2136   0,                                    /* @tp_setattr@ */
2137   0,                                    /* @tp_compare@ */
2138   0,                                    /* @tp_repr@ */
2139   0,                                    /* @tp_as_number@ */
2140   0,                                    /* @tp_as_sequence@ */
2141   0,                                    /* @tp_as_mapping@ */
2142   0,                                    /* @tp_hash@ */
2143   0,                                    /* @tp_call@ */
2144   0,                                    /* @tp_str@ */
2145   0,                                    /* @tp_getattro@ */
2146   0,                                    /* @tp_setattro@ */
2147   0,                                    /* @tp_as_buffer@ */
2148   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2149     Py_TPFLAGS_BASETYPE,
2150
2151   /* @tp_doc@ */
2152 "Message authentication code metametaclass.",
2153
2154   0,                                    /* @tp_traverse@ */
2155   0,                                    /* @tp_clear@ */
2156   0,                                    /* @tp_richcompare@ */
2157   0,                                    /* @tp_weaklistoffset@ */
2158   0,                                    /* @tp_iter@ */
2159   0,                                    /* @tp_iternext@ */
2160   0,                                    /* @tp_methods@ */
2161   0,                                    /* @tp_members@ */
2162   gcmac_pygetset,                       /* @tp_getset@ */
2163   0,                                    /* @tp_base@ */
2164   0,                                    /* @tp_dict@ */
2165   0,                                    /* @tp_descr_get@ */
2166   0,                                    /* @tp_descr_set@ */
2167   0,                                    /* @tp_dictoffset@ */
2168   0,                                    /* @tp_init@ */
2169   PyType_GenericAlloc,                  /* @tp_alloc@ */
2170   abstract_pynew,                       /* @tp_new@ */
2171   0,                                    /* @tp_free@ */
2172   0                                     /* @tp_is_gc@ */
2173 };
2174
2175 static PyTypeObject gmac_pytype_skel = {
2176   PyObject_HEAD_INIT(0) 0,              /* Header */
2177   "GMAC",                               /* @tp_name@ */
2178   sizeof(gmac_pyobj),                   /* @tp_basicsize@ */
2179   0,                                    /* @tp_itemsize@ */
2180
2181   gmac_pydealloc,                       /* @tp_dealloc@ */
2182   0,                                    /* @tp_print@ */
2183   0,                                    /* @tp_getattr@ */
2184   0,                                    /* @tp_setattr@ */
2185   0,                                    /* @tp_compare@ */
2186   0,                                    /* @tp_repr@ */
2187   0,                                    /* @tp_as_number@ */
2188   0,                                    /* @tp_as_sequence@ */
2189   0,                                    /* @tp_as_mapping@ */
2190   0,                                    /* @tp_hash@ */
2191   0,                                    /* @tp_call@ */
2192   0,                                    /* @tp_str@ */
2193   0,                                    /* @tp_getattro@ */
2194   0,                                    /* @tp_setattro@ */
2195   0,                                    /* @tp_as_buffer@ */
2196   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2197     Py_TPFLAGS_BASETYPE,
2198
2199   /* @tp_doc@ */
2200 "Message authentication code metaclass, abstract base class.",
2201
2202   0,                                    /* @tp_traverse@ */
2203   0,                                    /* @tp_clear@ */
2204   0,                                    /* @tp_richcompare@ */
2205   0,                                    /* @tp_weaklistoffset@ */
2206   0,                                    /* @tp_iter@ */
2207   0,                                    /* @tp_iternext@ */
2208   0,                                    /* @tp_methods@ */
2209   0,                                    /* @tp_members@ */
2210   0,                                    /* @tp_getset@ */
2211   0,                                    /* @tp_base@ */
2212   0,                                    /* @tp_dict@ */
2213   0,                                    /* @tp_descr_get@ */
2214   0,                                    /* @tp_descr_set@ */
2215   0,                                    /* @tp_dictoffset@ */
2216   0,                                    /* @tp_init@ */
2217   PyType_GenericAlloc,                  /* @tp_alloc@ */
2218   abstract_pynew,                       /* @tp_new@ */
2219   0,                                    /* @tp_free@ */
2220   0                                     /* @tp_is_gc@ */
2221 };
2222
2223 static PyTypeObject gmhash_pytype_skel = {
2224   PyObject_HEAD_INIT(0) 0,              /* Header */
2225   "GMACHash",                           /* @tp_name@ */
2226   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2227   0,                                    /* @tp_itemsize@ */
2228
2229   ghash_pydealloc,                      /* @tp_dealloc@ */
2230   0,                                    /* @tp_print@ */
2231   0,                                    /* @tp_getattr@ */
2232   0,                                    /* @tp_setattr@ */
2233   0,                                    /* @tp_compare@ */
2234   0,                                    /* @tp_repr@ */
2235   0,                                    /* @tp_as_number@ */
2236   0,                                    /* @tp_as_sequence@ */
2237   0,                                    /* @tp_as_mapping@ */
2238   0,                                    /* @tp_hash@ */
2239   0,                                    /* @tp_call@ */
2240   0,                                    /* @tp_str@ */
2241   0,                                    /* @tp_getattro@ */
2242   0,                                    /* @tp_setattro@ */
2243   0,                                    /* @tp_as_buffer@ */
2244   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2245     Py_TPFLAGS_BASETYPE,
2246
2247   /* @tp_doc@ */
2248 "Message authentication code, abstract base class.",
2249
2250   0,                                    /* @tp_traverse@ */
2251   0,                                    /* @tp_clear@ */
2252   0,                                    /* @tp_richcompare@ */
2253   0,                                    /* @tp_weaklistoffset@ */
2254   0,                                    /* @tp_iter@ */
2255   0,                                    /* @tp_iternext@ */
2256   0,                                    /* @tp_methods@ */
2257   0,                                    /* @tp_members@ */
2258   0,                                    /* @tp_getset@ */
2259   0,                                    /* @tp_base@ */
2260   0,                                    /* @tp_dict@ */
2261   0,                                    /* @tp_descr_get@ */
2262   0,                                    /* @tp_descr_set@ */
2263   0,                                    /* @tp_dictoffset@ */
2264   0,                                    /* @tp_init@ */
2265   PyType_GenericAlloc,                  /* @tp_alloc@ */
2266   abstract_pynew,                       /* @tp_new@ */
2267   0,                                    /* @tp_free@ */
2268   0                                     /* @tp_is_gc@ */
2269 };
2270
2271 /*----- Special snowflake for Poly1305 ------------------------------------*/
2272
2273 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2274
2275 typedef struct poly1305key_pyobj {
2276   PyHeapTypeObject ty;
2277   poly1305_key k;
2278 } poly1305key_pyobj;
2279
2280 typedef struct poly1305hash_pyobj {
2281   PyObject_HEAD
2282   unsigned f;
2283 #define f_mask 1u
2284   poly1305_ctx ctx;
2285 } poly1305hash_pyobj;
2286
2287 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2288 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2289 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2290
2291 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2292                                     PyObject *arg, PyObject *kw)
2293 {
2294   static const char *const kwlist[] = { "mask", 0 };
2295   poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2296   poly1305hash_pyobj *ph;
2297   char *m = 0;
2298   Py_ssize_t sz;
2299
2300   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#:new", KWLIST, &m, &sz))
2301     return (0);
2302   if (m && sz != POLY1305_MASKSZ) VALERR("bad mask length");
2303   ph = PyObject_NEW(poly1305hash_pyobj, ty);
2304   ph->f = 0;
2305   if (m) ph->f |= f_mask;
2306   poly1305_macinit(&ph->ctx, &pk->k, m);
2307   Py_INCREF(ty);
2308   return ((PyObject *)ph);
2309 end:
2310   return (0);
2311 }
2312
2313 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2314                                    PyObject *arg, PyObject *kw)
2315 {
2316   static const char *const kwlist[] = { "k", 0 };
2317   poly1305key_pyobj *pk;
2318   char *k;
2319   Py_ssize_t sz;
2320
2321   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2322     goto end;
2323   if (keysz(sz, poly1305_keysz) != sz) VALERR("bad key length");
2324
2325   pk = newtype(ty, 0, 0);
2326   pk->ty.ht_name = PyString_FromString("poly1305(keyed)");
2327   pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2328   pk->ty.ht_type.tp_name = PyString_AS_STRING(pk->ty.ht_name);
2329   pk->ty.ht_type.tp_base = poly1305hash_pytype;
2330   Py_INCREF(poly1305key_pytype);
2331   pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2332                              Py_TPFLAGS_BASETYPE |
2333                              Py_TPFLAGS_HEAPTYPE);
2334   pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2335   pk->ty.ht_type.tp_free = 0;
2336   pk->ty.ht_type.tp_new = poly1305hash_pynew;
2337   typeready(&pk->ty.ht_type);
2338
2339   poly1305_keyinit(&pk->k, k, sz);
2340   return ((PyObject *)pk);
2341
2342 end:
2343   return (0);
2344 }
2345
2346 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2347   { return (PyString_FromString("poly1305")); }
2348
2349 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2350   { return (keysz_pywrap(poly1305_keysz)); }
2351
2352 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2353   { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2354
2355 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2356   { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2357
2358 static PyObject *polymeth_copy(PyObject *me, PyObject *arg)
2359 {
2360   poly1305hash_pyobj *ph;
2361   if (!PyArg_ParseTuple(arg, ":copy")) return (0);
2362   ph = PyObject_NEW(poly1305hash_pyobj, me->ob_type);
2363   poly1305_copy(&ph->ctx, P1305_CTX(me));
2364   Py_INCREF(me->ob_type);
2365   return ((PyObject *)ph);
2366 }
2367
2368 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2369 {
2370   char *p;
2371   Py_ssize_t sz;
2372   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2373   poly1305_hash(P1305_CTX(me), p, sz);
2374   RETURN_ME;
2375 }
2376
2377 #define POLYMETH_HASHU_(n, W, w)                                        \
2378   static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg)       \
2379   {                                                                     \
2380     uint##n x;                                                          \
2381     octet b[SZ_##W];                                                    \
2382     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2383     STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b));         \
2384     RETURN_ME;                                                          \
2385   }
2386 DOUINTCONV(POLYMETH_HASHU_)
2387
2388 #define POLYMETH_HASHBUF_(n, W, w)                                      \
2389   static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg)     \
2390   {                                                                     \
2391     char *p;                                                            \
2392     Py_ssize_t sz;                                                      \
2393     octet b[SZ_##W];                                                    \
2394     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
2395     if (sz > MASK##n) TYERR("string too long");                         \
2396     STORE##W(b, sz); poly1305_hash(P1305_CTX(me), b, sizeof(b));        \
2397     poly1305_hash(P1305_CTX(me), p, sz);                                \
2398     RETURN_ME;                                                          \
2399   end:                                                                  \
2400     return (0);                                                         \
2401   }
2402 DOUINTCONV(POLYMETH_HASHBUF_)
2403
2404 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2405 {
2406   char *p;
2407   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2408   poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2409   RETURN_ME;
2410 }
2411
2412 static PyObject *polymeth_flush(PyObject *me, PyObject *arg)
2413 {
2414   if (!PyArg_ParseTuple(arg, ":flush")) return (0);
2415   poly1305_flush(P1305_CTX(me));
2416   RETURN_ME;
2417 }
2418
2419 static PyObject *polymeth_flushzero(PyObject *me, PyObject *arg)
2420 {
2421   if (!PyArg_ParseTuple(arg, ":flushzero")) return (0);
2422   poly1305_flushzero(P1305_CTX(me));
2423   RETURN_ME;
2424 }
2425
2426 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2427 {
2428   PyObject *pre, *suff;
2429   if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2430   if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2431       !PyObject_TypeCheck(suff, poly1305hash_pytype))
2432     TYERR("wanted a poly1305hash");
2433   if (me->ob_type != pre->ob_type || me->ob_type != suff->ob_type)
2434     TYERR("key mismatch");
2435   if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2436   poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2437   RETURN_ME;
2438 end:
2439   return (0);
2440 }
2441
2442 static PyObject *polymeth_done(PyObject *me, PyObject *arg)
2443 {
2444   PyObject *rc;
2445   if (!PyArg_ParseTuple(arg, ":done")) return (0);
2446   if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2447   rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2448   poly1305_done(P1305_CTX(me), PyString_AS_STRING(rc));
2449   return (rc);
2450 end:
2451   return (0);
2452 }
2453
2454 static PyGetSetDef poly1305cls_pygetset[] = {
2455 #define GETSETNAME(op, name) poly1305cls##op##_##name
2456   GET   (keysz,                 "PC.keysz -> acceptable key sizes")
2457   GET   (masksz,                "PC.masksz -> mask size")
2458   GET   (tagsz,                 "PC.tagsz -> MAC output size")
2459   GET   (name,                  "PC.name -> name of this kind of MAC")
2460 #undef GETSETNAME
2461   { 0 }
2462 };
2463
2464 static PyMethodDef poly1305hash_pymethods[] = {
2465 #define METHNAME(name) polymeth_##name
2466   METH  (copy,                  "P.copy() -> PP")
2467   METH  (hash,                  "P.hash(M)")
2468 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2469   DOUINTCONV(METHU_)
2470 #undef METHU_
2471 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2472   DOUINTCONV(METHBUF_)
2473 #undef METHBUF_
2474   METH  (hashstrz,              "P.hashstrz(STRING)")
2475   METH  (flush,                 "P.flush()")
2476   METH  (flushzero,             "P.flushzero()")
2477   METH  (concat,                "P.concat(PREFIX, SUFFIX)")
2478   METH  (done,                  "P.done() -> TAG")
2479 #undef METHNAME
2480   { 0 }
2481 };
2482
2483 static PyTypeObject poly1305cls_pytype_skel = {
2484   PyObject_HEAD_INIT(0) 0,              /* Header */
2485   "Poly1305Class",                      /* @tp_name@ */
2486   sizeof(PyHeapTypeObject),             /* @tp_basicsize@ */
2487   0,                                    /* @tp_itemsize@ */
2488
2489   0,                                    /* @tp_dealloc@ */
2490   0,                                    /* @tp_print@ */
2491   0,                                    /* @tp_getattr@ */
2492   0,                                    /* @tp_setattr@ */
2493   0,                                    /* @tp_compare@ */
2494   0,                                    /* @tp_repr@ */
2495   0,                                    /* @tp_as_number@ */
2496   0,                                    /* @tp_as_sequence@ */
2497   0,                                    /* @tp_as_mapping@ */
2498   0,                                    /* @tp_hash@ */
2499   0,                                    /* @tp_call@ */
2500   0,                                    /* @tp_str@ */
2501   0,                                    /* @tp_getattro@ */
2502   0,                                    /* @tp_setattro@ */
2503   0,                                    /* @tp_as_buffer@ */
2504   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2505     Py_TPFLAGS_BASETYPE,
2506
2507   /* @tp_doc@ */
2508 "Poly1305 metametaclass.  Best not to ask.",
2509
2510   0,                                    /* @tp_traverse@ */
2511   0,                                    /* @tp_clear@ */
2512   0,                                    /* @tp_richcompare@ */
2513   0,                                    /* @tp_weaklistoffset@ */
2514   0,                                    /* @tp_iter@ */
2515   0,                                    /* @tp_iternext@ */
2516   0,                                    /* @tp_methods@ */
2517   0,                                    /* @tp_members@ */
2518   poly1305cls_pygetset,                 /* @tp_getset@ */
2519   0,                                    /* @tp_base@ */
2520   0,                                    /* @tp_dict@ */
2521   0,                                    /* @tp_descr_get@ */
2522   0,                                    /* @tp_descr_set@ */
2523   0,                                    /* @tp_dictoffset@ */
2524   0,                                    /* @tp_init@ */
2525   PyType_GenericAlloc,                  /* @tp_alloc@ */
2526   abstract_pynew,                       /* @tp_new@ */
2527   0,                                    /* @tp_free@ */
2528   0                                     /* @tp_is_gc@ */
2529 };
2530
2531 static PyTypeObject poly1305key_pytype_skel = {
2532   PyObject_HEAD_INIT(0) 0,              /* Header */
2533   "poly1305",                           /* @tp_name@ */
2534   sizeof(poly1305key_pyobj),            /* @tp_basicsize@ */
2535   0,                                    /* @tp_itemsize@ */
2536
2537   0,                                    /* @tp_dealloc@ */
2538   0,                                    /* @tp_print@ */
2539   0,                                    /* @tp_getattr@ */
2540   0,                                    /* @tp_setattr@ */
2541   0,                                    /* @tp_compare@ */
2542   0,                                    /* @tp_repr@ */
2543   0,                                    /* @tp_as_number@ */
2544   0,                                    /* @tp_as_sequence@ */
2545   0,                                    /* @tp_as_mapping@ */
2546   0,                                    /* @tp_hash@ */
2547   0,                                    /* @tp_call@ */
2548   0,                                    /* @tp_str@ */
2549   0,                                    /* @tp_getattro@ */
2550   0,                                    /* @tp_setattro@ */
2551   0,                                    /* @tp_as_buffer@ */
2552   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2553     Py_TPFLAGS_BASETYPE,
2554
2555   /* @tp_doc@ */
2556 "poly1305(K): Poly1305 key.",
2557
2558   0,                                    /* @tp_traverse@ */
2559   0,                                    /* @tp_clear@ */
2560   0,                                    /* @tp_richcompare@ */
2561   0,                                    /* @tp_weaklistoffset@ */
2562   0,                                    /* @tp_iter@ */
2563   0,                                    /* @tp_iternext@ */
2564   0,                                    /* @tp_methods@ */
2565   0,                                    /* @tp_members@ */
2566   0,                                    /* @tp_getset@ */
2567   0,                                    /* @tp_base@ */
2568   0,                                    /* @tp_dict@ */
2569   0,                                    /* @tp_descr_get@ */
2570   0,                                    /* @tp_descr_set@ */
2571   0,                                    /* @tp_dictoffset@ */
2572   0,                                    /* @tp_init@ */
2573   PyType_GenericAlloc,                  /* @tp_alloc@ */
2574   poly1305key_pynew,                    /* @tp_new@ */
2575   0,                                    /* @tp_free@ */
2576   0                                     /* @tp_is_gc@ */
2577 };
2578
2579 static PyTypeObject poly1305hash_pytype_skel = {
2580   PyObject_HEAD_INIT(0) 0,              /* Header */
2581   "Poly1305Hash",                       /* @tp_name@ */
2582   sizeof(poly1305hash_pyobj),           /* @tp_basicsize@ */
2583   0,                                    /* @tp_itemsize@ */
2584
2585   0,                                    /* @tp_dealloc@ */
2586   0,                                    /* @tp_print@ */
2587   0,                                    /* @tp_getattr@ */
2588   0,                                    /* @tp_setattr@ */
2589   0,                                    /* @tp_compare@ */
2590   0,                                    /* @tp_repr@ */
2591   0,                                    /* @tp_as_number@ */
2592   0,                                    /* @tp_as_sequence@ */
2593   0,                                    /* @tp_as_mapping@ */
2594   0,                                    /* @tp_hash@ */
2595   0,                                    /* @tp_call@ */
2596   0,                                    /* @tp_str@ */
2597   0,                                    /* @tp_getattro@ */
2598   0,                                    /* @tp_setattro@ */
2599   0,                                    /* @tp_as_buffer@ */
2600   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2601     Py_TPFLAGS_BASETYPE,
2602
2603   /* @tp_doc@ */
2604 "Poly1305 MAC context base class.",
2605
2606   0,                                    /* @tp_traverse@ */
2607   0,                                    /* @tp_clear@ */
2608   0,                                    /* @tp_richcompare@ */
2609   0,                                    /* @tp_weaklistoffset@ */
2610   0,                                    /* @tp_iter@ */
2611   0,                                    /* @tp_iternext@ */
2612   poly1305hash_pymethods,               /* @tp_methods@ */
2613   0,                                    /* @tp_members@ */
2614   0,                                    /* @tp_getset@ */
2615   0,                                    /* @tp_base@ */
2616   0,                                    /* @tp_dict@ */
2617   0,                                    /* @tp_descr_get@ */
2618   0,                                    /* @tp_descr_set@ */
2619   0,                                    /* @tp_dictoffset@ */
2620   0,                                    /* @tp_init@ */
2621   PyType_GenericAlloc,                  /* @tp_alloc@ */
2622   abstract_pynew,                       /* @tp_new@ */
2623   0,                                    /* @tp_free@ */
2624   0                                     /* @tp_is_gc@ */
2625 };
2626
2627 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2628
2629 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance)                        \
2630   static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg)     \
2631   {                                                                     \
2632     dance##_ctx dance;                                                  \
2633     char *k, *n;                                                        \
2634     Py_ssize_t ksz, nsz;                                                \
2635     PyObject *rc;                                                       \
2636     if (!PyArg_ParseTuple(arg, "s#s#:" #hdance "_prf",                  \
2637                           &k, &ksz, &n, &nsz))                          \
2638       goto end;                                                         \
2639     if (ksz != keysz(ksz, dance##_keysz)) VALERR("bad key length");     \
2640     if (nsz != HDANCE##_INSZ) VALERR("bad input length");               \
2641     rc = bytestring_pywrap(0, HSALSA20_OUTSZ);                          \
2642     dance##_init(&dance, k, ksz, 0);                                    \
2643     hdance##_prf(&dance, n, PyString_AS_STRING(rc));                    \
2644     return (rc);                                                        \
2645   end:                                                                  \
2646     return (0);                                                         \
2647   }
2648
2649 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2650 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2651 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2652
2653 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2654 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2655 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2656
2657 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2658
2659 static PyTypeObject *kxvik_pytype;
2660
2661 typedef struct kxvik_pyobj {
2662   PyObject_HEAD
2663   keccak1600_state s;
2664   unsigned n;
2665 } kxvik_pyobj;
2666
2667 static PyObject *kxvik_pynew(PyTypeObject *ty,
2668                                   PyObject *arg, PyObject *kw)
2669 {
2670   unsigned n = 24;
2671   kxvik_pyobj *rc = 0;
2672   static const char *const kwlist[] = { "nround", 0 };
2673   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2674                                    convuint, &n))
2675     goto end;
2676   rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2677   rc->n = n;
2678   keccak1600_init(&rc->s);
2679 end:
2680   return ((PyObject *)rc);
2681 }
2682
2683 static PyObject *kxvikmeth_copy(PyObject *me, PyObject *arg)
2684 {
2685   kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2686   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
2687   rc = (kxvik_pyobj *)k->ob_type->tp_alloc(k->ob_type, 0);
2688   rc->s = k->s; rc->n = k->n;
2689 end:
2690   return ((PyObject *)rc);
2691 }
2692
2693 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2694 {
2695   kxvik_pyobj *k = (kxvik_pyobj *)me;
2696   kludge64 t[25];
2697   const octet *q;
2698   octet buf[8];
2699   unsigned i;
2700   char *p; Py_ssize_t n;
2701
2702   if (!PyArg_ParseTuple(arg, "s#:mix", &p, &n)) goto end;
2703   if (n > 200) VALERR("out of range");
2704   q = (const octet *)p;
2705   i = 0;
2706   while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2707   if (n) {
2708     memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2709     LOAD64_L_(t[i], buf); i++;
2710   }
2711   keccak1600_mix(&k->s, t, i);
2712   RETURN_ME;
2713 end:
2714   return (0);
2715 }
2716
2717 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2718 {
2719   kxvik_pyobj *k = (kxvik_pyobj *)me;
2720   PyObject *rc = 0;
2721   kludge64 t[25];
2722   octet *q, buf[8];
2723   unsigned i;
2724   unsigned n;
2725
2726   if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2727   if (n > 200) VALERR("out of range");
2728   rc = bytestring_pywrap(0, n);
2729   q = (octet *)PyString_AS_STRING(rc);
2730   keccak1600_extract(&k->s, t, (n + 7)/8);
2731   i = 0;
2732   while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2733   if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2734 end:
2735   return (rc);
2736 }
2737
2738 static PyObject *kxvikmeth_step(PyObject *me, PyObject *arg)
2739 {
2740   kxvik_pyobj *k = (kxvik_pyobj *)me;
2741   if (!PyArg_ParseTuple(arg, ":step")) return (0);
2742   keccak1600_p(&k->s, &k->s, k->n);
2743   RETURN_ME;
2744 }
2745
2746 static PyObject *kxvikget_nround(PyObject *me, void *hunoz)
2747 {
2748   kxvik_pyobj *k = (kxvik_pyobj *)me;
2749   return (PyInt_FromLong(k->n));
2750 }
2751
2752 static int kxvikset_nround(PyObject *me, PyObject *val, void *hunoz)
2753 {
2754   kxvik_pyobj *k = (kxvik_pyobj *)me;
2755   unsigned n;
2756   int rc = -1;
2757
2758   if (!val) NIERR("__del__");
2759   if (!convuint(val, &n)) goto end;
2760   k->n = n;
2761   rc = 0;
2762 end:
2763   return (rc);
2764 }
2765
2766 static PyGetSetDef kxvik_pygetset[] = {
2767 #define GETSETNAME(op, name) kxvik##op##_##name
2768   GETSET(nround,                "KECCAK.nround -> number of rounds")
2769 #undef GETSETNAME
2770   { 0 }
2771 };
2772
2773 static PyMethodDef kxvik_pymethods[] = {
2774 #define METHNAME(func) kxvikmeth_##func
2775   METH  (copy,                  "KECCAK.copy() -> KECCAK'")
2776   METH  (mix,                   "KECCAK.mix(DATA)")
2777   METH  (extract,               "KECCAK.extract(NOCTETS)")
2778   METH  (step,                  "KECCAK.step()")
2779 #undef METHNAME
2780   { 0 }
2781 };
2782
2783 static PyTypeObject kxvik_pytype_skel = {
2784   PyObject_HEAD_INIT(0) 0,              /* Header */
2785   "Keccak1600",                         /* @tp_name@ */
2786   sizeof(kxvik_pyobj),                  /* @tp_basicsize@ */
2787   0,                                    /* @tp_itemsize@ */
2788
2789   0,                                    /* @tp_dealloc@ */
2790   0,                                    /* @tp_print@ */
2791   0,                                    /* @tp_getattr@ */
2792   0,                                    /* @tp_setattr@ */
2793   0,                                    /* @tp_compare@ */
2794   0,                                    /* @tp_repr@ */
2795   0,                                    /* @tp_as_number@ */
2796   0,                                    /* @tp_as_sequence@ */
2797   0,                                    /* @tp_as_mapping@ */
2798   0,                                    /* @tp_hash@ */
2799   0,                                    /* @tp_call@ */
2800   0,                                    /* @tp_str@ */
2801   0,                                    /* @tp_getattro@ */
2802   0,                                    /* @tp_setattro@ */
2803   0,                                    /* @tp_as_buffer@ */
2804   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2805     Py_TPFLAGS_BASETYPE,
2806
2807   /* @tp_doc@ */
2808 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2809
2810   0,                                    /* @tp_traverse@ */
2811   0,                                    /* @tp_clear@ */
2812   0,                                    /* @tp_richcompare@ */
2813   0,                                    /* @tp_weaklistoffset@ */
2814   0,                                    /* @tp_iter@ */
2815   0,                                    /* @tp_iternext@ */
2816   kxvik_pymethods,                      /* @tp_methods@ */
2817   0,                                    /* @tp_members@ */
2818   kxvik_pygetset,                       /* @tp_getset@ */
2819   0,                                    /* @tp_base@ */
2820   0,                                    /* @tp_dict@ */
2821   0,                                    /* @tp_descr_get@ */
2822   0,                                    /* @tp_descr_set@ */
2823   0,                                    /* @tp_dictoffset@ */
2824   0,                                    /* @tp_init@ */
2825   PyType_GenericAlloc,                  /* @tp_alloc@ */
2826   kxvik_pynew,                          /* @tp_new@ */
2827   0,                                    /* @tp_free@ */
2828   0                                     /* @tp_is_gc@ */
2829 };
2830
2831 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2832
2833 typedef struct shake_pyobj {
2834   PyObject_HEAD
2835   int st;
2836   shake_ctx h;
2837 } shake_pyobj;
2838
2839 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
2840 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
2841
2842 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
2843                                               const void *, size_t,
2844                                               const void *, size_t),
2845                                PyTypeObject *ty,
2846                                PyObject *arg, PyObject *kw)
2847 {
2848   shake_pyobj *rc = 0;
2849   char *p = 0, *f = 0;
2850   Py_ssize_t psz = 0, fsz = 0;
2851   static const char *const kwlist[] = { "perso", "func", 0 };
2852
2853   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#s#:new", KWLIST,
2854                                    &p, &psz, &f, &fsz))
2855     goto end;
2856   rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
2857   initfn(&rc->h, f, fsz, p, psz);
2858   rc->st = 0;
2859 end:
2860   return ((PyObject *)rc);
2861 }
2862
2863 static PyObject *shake128_pynew(PyTypeObject *ty,
2864                                 PyObject *arg, PyObject *kw)
2865   { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
2866
2867 static PyObject *shake256_pynew(PyTypeObject *ty,
2868                                 PyObject *arg, PyObject *kw)
2869   { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
2870
2871 static int shake_check(PyObject *me, int st)
2872 {
2873   if (SHAKE_ST(me) != st) VALERR("wrong state");
2874   return (0);
2875 end:
2876   return (-1);
2877 }
2878
2879 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
2880 {
2881   char *p;
2882   Py_ssize_t sz;
2883   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2884   if (shake_check(me, 0)) return (0);
2885   shake_hash(SHAKE_H(me), p, sz);
2886   RETURN_ME;
2887 }
2888
2889 #define SHAKEMETH_HASHU_(n, W, w)                                       \
2890   static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg)      \
2891   {                                                                     \
2892     uint##n x;                                                          \
2893     octet b[SZ_##W];                                                    \
2894     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2895     if (shake_check(me, 0)) return (0);                                 \
2896     STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b));              \
2897     RETURN_ME;                                                          \
2898   }
2899 DOUINTCONV(SHAKEMETH_HASHU_)
2900
2901 #define SHAKEMETH_HASHBUF_(n, W, w)                                     \
2902   static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg)    \
2903   {                                                                     \
2904     char *p;                                                            \
2905     Py_ssize_t sz;                                                      \
2906     octet b[SZ_##W];                                                    \
2907     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
2908     if (sz > MASK##n) TYERR("string too long");                         \
2909     if (shake_check(me, 0)) goto end;                                   \
2910     STORE##W(b, sz); shake_hash(SHAKE_H(me), b, sizeof(b));             \
2911     shake_hash(SHAKE_H(me), p, sz);                                     \
2912     RETURN_ME;                                                          \
2913   end:                                                                  \
2914     return (0);                                                         \
2915   }
2916 DOUINTCONV(SHAKEMETH_HASHBUF_)
2917
2918 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
2919 {
2920   char *p;
2921   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2922   if (shake_check(me, 0)) return (0);
2923   shake_hash(SHAKE_H(me), p, strlen(p) + 1);
2924   RETURN_ME;
2925 }
2926
2927 static PyObject *shakemeth_xof(PyObject *me, PyObject *arg)
2928 {
2929   if (!PyArg_ParseTuple(arg, ":xof")) goto end;
2930   if (shake_check(me, 0)) goto end;
2931   shake_xof(SHAKE_H(me));
2932   SHAKE_ST(me) = 1;
2933   RETURN_ME;
2934 end:
2935   return (0);
2936 }
2937
2938 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
2939 {
2940   PyObject *rc = 0;
2941   size_t n;
2942   if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
2943   if (shake_check(me, 0)) goto end;
2944   rc = bytestring_pywrap(0, n);
2945   shake_done(SHAKE_H(me), PyString_AS_STRING(rc), n);
2946   SHAKE_ST(me) = -1;
2947 end:
2948   return (rc);
2949 }
2950
2951 static PyObject *shakemeth_copy(PyObject *me, PyObject *arg)
2952 {
2953   shake_pyobj *rc = 0;
2954
2955   if (!PyArg_ParseTuple(arg, ":copy")) goto end;
2956   rc = PyObject_NEW(shake_pyobj, me->ob_type);
2957   rc->h = *SHAKE_H(me);
2958   rc->st = SHAKE_ST(me);
2959 end:
2960   return ((PyObject *)rc);
2961 }
2962
2963 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
2964 {
2965   PyObject *rc = 0;
2966   size_t sz;
2967
2968   if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
2969   if (shake_check(me, 1)) goto end;
2970   rc = bytestring_pywrap(0, sz);
2971   shake_get(SHAKE_H(me), PyString_AS_STRING(rc), sz);
2972 end:
2973   return (rc);
2974 }
2975
2976 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
2977 {
2978   PyObject *rc = 0;
2979   char *p; Py_ssize_t sz;
2980
2981   if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) goto end;
2982   if (shake_check(me, 1)) goto end;
2983   rc = bytestring_pywrap(0, sz);
2984   shake_mask(SHAKE_H(me), p, PyString_AS_STRING(rc), sz);
2985 end:
2986   return (rc);
2987 }
2988
2989 static PyObject *shakeget_rate(PyObject *me, void *hunoz)
2990   { return (PyInt_FromLong(SHAKE_H(me)->h.r)); }
2991
2992 static PyObject *shakeget_buffered(PyObject *me, void *hunoz)
2993   { return (PyInt_FromLong(SHAKE_H(me)->h.n)); }
2994
2995 static PyObject *shakeget_state(PyObject *me, void *hunoz)
2996 {
2997   int st = SHAKE_ST(me);
2998   return (PyString_FromString(st == 0 ? "absorb" :
2999                               st == 1 ? "squeeze" : "dead"));
3000 }
3001
3002 static PyGetSetDef shake_pygetset[] = {
3003 #define GETSETNAME(op, name) shake##op##_##name
3004   GET   (rate,                  "S.rate -> rate, in bytes")
3005   GET   (buffered,              "S.buffered -> amount currently buffered")
3006   GET   (state,                 "S.state -> `absorb', `squeeze', `dead'")
3007 #undef GETSETNAME
3008   { 0 }
3009 };
3010
3011 static PyMethodDef shake_pymethods[] = {
3012 #define METHNAME(func) shakemeth_##func
3013   METH  (copy,                  "S.copy() -> SS")
3014   METH  (hash,                  "S.hash(M)")
3015 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3016   DOUINTCONV(METHU_)
3017 #undef METHU_
3018 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3019   DOUINTCONV(METHBUF_)
3020 #undef METHBUF_
3021   METH  (hashstrz,              "S.hashstrz(STRING)")
3022   METH  (xof,                   "S.xof()")
3023   METH  (done,                  "S.done(LEN) ->H")
3024   METH  (get,                   "S.get(LEN) -> H")
3025   METH  (mask,                  "S.mask(M) -> C")
3026 #undef METHNAME
3027   { 0 }
3028 };
3029
3030 static PyTypeObject shake_pytype_skel = {
3031   PyObject_HEAD_INIT(0) 0,              /* Header */
3032   "Shake",                              /* @tp_name@ */
3033   sizeof(shake_pyobj),                  /* @tp_basicsize@ */
3034   0,                                    /* @tp_itemsize@ */
3035
3036   0,                                    /* @tp_dealloc@ */
3037   0,                                    /* @tp_print@ */
3038   0,                                    /* @tp_getattr@ */
3039   0,                                    /* @tp_setattr@ */
3040   0,                                    /* @tp_compare@ */
3041   0,                                    /* @tp_repr@ */
3042   0,                                    /* @tp_as_number@ */
3043   0,                                    /* @tp_as_sequence@ */
3044   0,                                    /* @tp_as_mapping@ */
3045   0,                                    /* @tp_hash@ */
3046   0,                                    /* @tp_call@ */
3047   0,                                    /* @tp_str@ */
3048   0,                                    /* @tp_getattro@ */
3049   0,                                    /* @tp_setattro@ */
3050   0,                                    /* @tp_as_buffer@ */
3051   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3052     Py_TPFLAGS_BASETYPE,
3053
3054   /* @tp_doc@ */
3055 "SHAKE/cSHAKE base class.",
3056
3057   0,                                    /* @tp_traverse@ */
3058   0,                                    /* @tp_clear@ */
3059   0,                                    /* @tp_richcompare@ */
3060   0,                                    /* @tp_weaklistoffset@ */
3061   0,                                    /* @tp_iter@ */
3062   0,                                    /* @tp_iternext@ */
3063   shake_pymethods,                      /* @tp_methods@ */
3064   0,                                    /* @tp_members@ */
3065   shake_pygetset,                       /* @tp_getset@ */
3066   0,                                    /* @tp_base@ */
3067   0,                                    /* @tp_dict@ */
3068   0,                                    /* @tp_descr_get@ */
3069   0,                                    /* @tp_descr_set@ */
3070   0,                                    /* @tp_dictoffset@ */
3071   0,                                    /* @tp_init@ */
3072   PyType_GenericAlloc,                  /* @tp_alloc@ */
3073   abstract_pynew,                       /* @tp_new@ */
3074   0,                                    /* @tp_free@ */
3075   0                                     /* @tp_is_gc@ */
3076 };
3077
3078 static PyTypeObject shake128_pytype_skel = {
3079   PyObject_HEAD_INIT(0) 0,              /* Header */
3080   "Shake128",                           /* @tp_name@ */
3081   0,                                    /* @tp_basicsize@ */
3082   0,                                    /* @tp_itemsize@ */
3083
3084   0,                                    /* @tp_dealloc@ */
3085   0,                                    /* @tp_print@ */
3086   0,                                    /* @tp_getattr@ */
3087   0,                                    /* @tp_setattr@ */
3088   0,                                    /* @tp_compare@ */
3089   0,                                    /* @tp_repr@ */
3090   0,                                    /* @tp_as_number@ */
3091   0,                                    /* @tp_as_sequence@ */
3092   0,                                    /* @tp_as_mapping@ */
3093   0,                                    /* @tp_hash@ */
3094   0,                                    /* @tp_call@ */
3095   0,                                    /* @tp_str@ */
3096   0,                                    /* @tp_getattro@ */
3097   0,                                    /* @tp_setattro@ */
3098   0,                                    /* @tp_as_buffer@ */
3099   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3100     Py_TPFLAGS_BASETYPE,
3101
3102   /* @tp_doc@ */
3103 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3104
3105   0,                                    /* @tp_traverse@ */
3106   0,                                    /* @tp_clear@ */
3107   0,                                    /* @tp_richcompare@ */
3108   0,                                    /* @tp_weaklistoffset@ */
3109   0,                                    /* @tp_iter@ */
3110   0,                                    /* @tp_iternext@ */
3111   0,                                    /* @tp_methods@ */
3112   0,                                    /* @tp_members@ */
3113   0,                                    /* @tp_getset@ */
3114   0,                                    /* @tp_base@ */
3115   0,                                    /* @tp_dict@ */
3116   0,                                    /* @tp_descr_get@ */
3117   0,                                    /* @tp_descr_set@ */
3118   0,                                    /* @tp_dictoffset@ */
3119   0,                                    /* @tp_init@ */
3120   PyType_GenericAlloc,                  /* @tp_alloc@ */
3121   shake128_pynew,                       /* @tp_new@ */
3122   0,                                    /* @tp_free@ */
3123   0                                     /* @tp_is_gc@ */
3124 };
3125
3126 static PyTypeObject shake256_pytype_skel = {
3127   PyObject_HEAD_INIT(0) 0,              /* Header */
3128   "Shake256",                           /* @tp_name@ */
3129   0,                                    /* @tp_basicsize@ */
3130   0,                                    /* @tp_itemsize@ */
3131
3132   0,                                    /* @tp_dealloc@ */
3133   0,                                    /* @tp_print@ */
3134   0,                                    /* @tp_getattr@ */
3135   0,                                    /* @tp_setattr@ */
3136   0,                                    /* @tp_compare@ */
3137   0,                                    /* @tp_repr@ */
3138   0,                                    /* @tp_as_number@ */
3139   0,                                    /* @tp_as_sequence@ */
3140   0,                                    /* @tp_as_mapping@ */
3141   0,                                    /* @tp_hash@ */
3142   0,                                    /* @tp_call@ */
3143   0,                                    /* @tp_str@ */
3144   0,                                    /* @tp_getattro@ */
3145   0,                                    /* @tp_setattro@ */
3146   0,                                    /* @tp_as_buffer@ */
3147   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3148     Py_TPFLAGS_BASETYPE,
3149
3150   /* @tp_doc@ */
3151 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3152
3153   0,                                    /* @tp_traverse@ */
3154   0,                                    /* @tp_clear@ */
3155   0,                                    /* @tp_richcompare@ */
3156   0,                                    /* @tp_weaklistoffset@ */
3157   0,                                    /* @tp_iter@ */
3158   0,                                    /* @tp_iternext@ */
3159   0,                                    /* @tp_methods@ */
3160   0,                                    /* @tp_members@ */
3161   0,                                    /* @tp_getset@ */
3162   0,                                    /* @tp_base@ */
3163   0,                                    /* @tp_dict@ */
3164   0,                                    /* @tp_descr_get@ */
3165   0,                                    /* @tp_descr_set@ */
3166   0,                                    /* @tp_dictoffset@ */
3167   0,                                    /* @tp_init@ */
3168   PyType_GenericAlloc,                  /* @tp_alloc@ */
3169   shake256_pynew,                       /* @tp_new@ */
3170   0,                                    /* @tp_free@ */
3171   0                                     /* @tp_is_gc@ */
3172 };
3173
3174 /*----- Pseudorandom permutations -----------------------------------------*/
3175
3176 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3177
3178 typedef struct prpinfo {
3179   const char *name;
3180   const octet *keysz;
3181   size_t ctxsz;
3182   size_t blksz;
3183   void (*init)(void *, const void *, size_t);
3184   void (*eblk)(void *, const void *, void *);
3185   void (*dblk)(void *, const void *, void *);
3186 } prpinfo;
3187
3188 #define PRP_DEF(PRE, pre)                                               \
3189   static void pre##_prpinit(void *ctx, const void *k, size_t ksz)       \
3190     { pre##_init(ctx, k, ksz); }                                        \
3191   static void pre##_prpeblk(void *ctx, const void *in, void *out)       \
3192   {                                                                     \
3193     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3194     pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3195   }                                                                     \
3196   static void pre##_prpdblk(void *ctx, const void *in, void *out)       \
3197   {                                                                     \
3198     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3199     pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3200   }                                                                     \
3201   static const prpinfo pre##_prpinfo = {                                \
3202     #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ,                  \
3203     pre##_prpinit, pre##_prpeblk, pre##_prpdblk                         \
3204   };
3205 PRPS(PRP_DEF)
3206
3207 static const struct prpinfo *const gprptab[] = {
3208 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3209   PRPS(PRP_ENTRY)
3210   0
3211 };
3212
3213 typedef struct gcprp_pyobj {
3214   PyHeapTypeObject ty;
3215   const prpinfo *prp;
3216 } gcprp_pyobj;
3217 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3218
3219 typedef struct gprp_pyobj {
3220   PyObject_HEAD
3221   const prpinfo *prp;
3222 } gprp_pyobj;
3223 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3224 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3225
3226 typedef struct prp {
3227   const prpinfo *prp;
3228   void *ctx;
3229 } prp;
3230
3231 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3232 {
3233   static const char *const kwlist[] = { "key", 0 };
3234   char *k;
3235   Py_ssize_t sz;
3236   const prpinfo *prp = GCPRP_PRP(ty);
3237   PyObject *me;
3238
3239   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
3240     goto end;
3241   if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
3242   me = (PyObject *)ty->tp_alloc(ty, 0);
3243   GPRP_PRP(me) = prp;
3244   prp->init(GPRP_CTX(me), k, sz);
3245   Py_INCREF(me);
3246   return (me);
3247 end:
3248   return (0);
3249 }
3250
3251 static void gprp_pydealloc(PyObject *me)
3252   { Py_DECREF(me->ob_type); FREEOBJ(me); }
3253
3254 static PyObject *gcprp_pywrap(const prpinfo *prp)
3255 {
3256   gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3257   g->prp = prp;
3258   g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3259   g->ty.ht_type.tp_base = gprp_pytype;
3260   Py_INCREF(gprp_pytype);
3261   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3262                             Py_TPFLAGS_BASETYPE |
3263                             Py_TPFLAGS_HEAPTYPE);
3264   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3265   g->ty.ht_type.tp_free = 0;
3266   g->ty.ht_type.tp_new = gprp_pynew;
3267   typeready(&g->ty.ht_type);
3268   return ((PyObject *)g);
3269 }
3270
3271 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3272   { return (PyString_FromString(GCPRP_PRP(me)->name)); }
3273 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3274   { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3275 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3276   { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3277
3278 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3279 {
3280   char *p;
3281   Py_ssize_t n;
3282   PyObject *rc = 0;
3283
3284   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
3285   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3286   rc = bytestring_pywrap(0, n);
3287   GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3288 end:
3289   return (rc);
3290 }
3291
3292 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3293 {
3294   char *p;
3295   Py_ssize_t n;
3296   PyObject *rc = 0;
3297
3298   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
3299   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3300   rc = bytestring_pywrap(0, n);
3301   GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3302 end:
3303   return (rc);
3304 }
3305
3306 static PyGetSetDef gcprp_pygetset[] = {
3307 #define GETSETNAME(op, name) gcp##op##_##name
3308   GET   (keysz,                 "CP.keysz -> acceptable key sizes")
3309   GET   (blksz,                 "CP.blksz -> block size")
3310   GET   (name,                  "CP.name -> name of this kind of PRP")
3311 #undef GETSETNAME
3312   { 0 }
3313 };
3314
3315 static PyMethodDef gprp_pymethods[] = {
3316 #define METHNAME(name) gpmeth_##name
3317   METH  (encrypt,               "P.encrypt(PT) -> CT")
3318   METH  (decrypt,               "P.decrypt(CT) -> PT")
3319 #undef METHNAME
3320   { 0 }
3321 };
3322
3323 static PyTypeObject gcprp_pytype_skel = {
3324   PyObject_HEAD_INIT(0) 0,              /* Header */
3325   "GCPRP",                              /* @tp_name@ */
3326   sizeof(gcprp_pyobj),                  /* @tp_basicsize@ */
3327   0,                                    /* @tp_itemsize@ */
3328
3329   0,                                    /* @tp_dealloc@ */
3330   0,                                    /* @tp_print@ */
3331   0,                                    /* @tp_getattr@ */
3332   0,                                    /* @tp_setattr@ */
3333   0,                                    /* @tp_compare@ */
3334   0,                                    /* @tp_repr@ */
3335   0,                                    /* @tp_as_number@ */
3336   0,                                    /* @tp_as_sequence@ */
3337   0,                                    /* @tp_as_mapping@ */
3338   0,                                    /* @tp_hash@ */
3339   0,                                    /* @tp_call@ */
3340   0,                                    /* @tp_str@ */
3341   0,                                    /* @tp_getattro@ */
3342   0,                                    /* @tp_setattro@ */
3343   0,                                    /* @tp_as_buffer@ */
3344   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3345     Py_TPFLAGS_BASETYPE,
3346
3347   /* @tp_doc@ */
3348 "Pseudorandom permutation metaclass.",
3349
3350   0,                                    /* @tp_traverse@ */
3351   0,                                    /* @tp_clear@ */
3352   0,                                    /* @tp_richcompare@ */
3353   0,                                    /* @tp_weaklistoffset@ */
3354   0,                                    /* @tp_iter@ */
3355   0,                                    /* @tp_iternext@ */
3356   0,                                    /* @tp_methods@ */
3357   0,                                    /* @tp_members@ */
3358   gcprp_pygetset,                       /* @tp_getset@ */
3359   0,                                    /* @tp_base@ */
3360   0,                                    /* @tp_dict@ */
3361   0,                                    /* @tp_descr_get@ */
3362   0,                                    /* @tp_descr_set@ */
3363   0,                                    /* @tp_dictoffset@ */
3364   0,                                    /* @tp_init@ */
3365   PyType_GenericAlloc,                  /* @tp_alloc@ */
3366   abstract_pynew,                       /* @tp_new@ */
3367   0,                                    /* @tp_free@ */
3368   0                                     /* @tp_is_gc@ */
3369 };
3370
3371 static PyTypeObject gprp_pytype_skel = {
3372   PyObject_HEAD_INIT(0) 0,              /* Header */
3373   "GPRP",                               /* @tp_name@ */
3374   sizeof(gprp_pyobj),                   /* @tp_basicsize@ */
3375   0,                                    /* @tp_itemsize@ */
3376
3377   gprp_pydealloc,                       /* @tp_dealloc@ */
3378   0,                                    /* @tp_print@ */
3379   0,                                    /* @tp_getattr@ */
3380   0,                                    /* @tp_setattr@ */
3381   0,                                    /* @tp_compare@ */
3382   0,                                    /* @tp_repr@ */
3383   0,                                    /* @tp_as_number@ */
3384   0,                                    /* @tp_as_sequence@ */
3385   0,                                    /* @tp_as_mapping@ */
3386   0,                                    /* @tp_hash@ */
3387   0,                                    /* @tp_call@ */
3388   0,                                    /* @tp_str@ */
3389   0,                                    /* @tp_getattro@ */
3390   0,                                    /* @tp_setattro@ */
3391   0,                                    /* @tp_as_buffer@ */
3392   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3393     Py_TPFLAGS_BASETYPE,
3394
3395   /* @tp_doc@ */
3396 "Pseudorandom permutation, abstract base class.",
3397
3398   0,                                    /* @tp_traverse@ */
3399   0,                                    /* @tp_clear@ */
3400   0,                                    /* @tp_richcompare@ */
3401   0,                                    /* @tp_weaklistoffset@ */
3402   0,                                    /* @tp_iter@ */
3403   0,                                    /* @tp_iternext@ */
3404   gprp_pymethods,                       /* @tp_methods@ */
3405   0,                                    /* @tp_members@ */
3406   0,                                    /* @tp_getset@ */
3407   0,                                    /* @tp_base@ */
3408   0,                                    /* @tp_dict@ */
3409   0,                                    /* @tp_descr_get@ */
3410   0,                                    /* @tp_descr_set@ */
3411   0,                                    /* @tp_dictoffset@ */
3412   0,                                    /* @tp_init@ */
3413   PyType_GenericAlloc,                  /* @tp_alloc@ */
3414   abstract_pynew,                       /* @tp_new@ */
3415   0,                                    /* @tp_free@ */
3416   0                                     /* @tp_is_gc@ */
3417 };
3418
3419 /*----- Main code ---------------------------------------------------------*/
3420
3421 static PyMethodDef methods[] = {
3422 #define METHNAME(func) meth_##func
3423   METH  (_KeySZ_fromdl,         "\
3424 fromdl(N) -> M: convert integer discrete log field size to work factor")
3425   METH  (_KeySZ_fromschnorr,    "\
3426 fromschnorr(N) -> M: convert Schnorr group order to work factor")
3427   METH  (_KeySZ_fromif,         "\
3428 fromif(N) -> M: convert integer factorization problem size to work factor")
3429   METH  (_KeySZ_fromec,         "\
3430 fromec(N) -> M: convert elliptic curve group order to work factor")
3431   METH  (_KeySZ_todl,           "\
3432 todl(N) -> M: convert work factor to integer discrete log field size")
3433   METH  (_KeySZ_toschnorr,      "\
3434 toschnorr(N) -> M: convert work factor to Schnorr group order")
3435   METH  (_KeySZ_toif,           "\
3436 toif(N) -> M: convert work factor to integer factorization problem size")
3437   METH  (_KeySZ_toec,           "\
3438 toec(N) -> M: convert work factor to elliptic curve group order")
3439   METH  (_KeySZ_toec,           "\
3440 toec(N) -> M: convert work factor to elliptic curve group order")
3441 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, "\
3442 " #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3443   METH_HDANCE(hsalsa20, "HSalsa20")
3444   METH_HDANCE(hsalsa2012, "HSalsa20/12")
3445   METH_HDANCE(hsalsa208, "HSalsa20/8")
3446   METH_HDANCE(hchacha20, "HChaCha20")
3447   METH_HDANCE(hchacha12, "HChaCha12")
3448   METH_HDANCE(hchacha8, "HChaCha8")
3449 #undef METH_DANCE
3450 #undef METHNAME
3451   { 0 }
3452 };
3453
3454 void algorithms_pyinit(void)
3455 {
3456   INITTYPE(keysz, root);
3457   INITTYPE(keyszany, keysz);
3458   INITTYPE(keyszrange, keysz);
3459   INITTYPE(keyszset, keysz);
3460   INITTYPE(gccipher, type);
3461   INITTYPE(gcipher, root);
3462   INITTYPE(gcaead, type);
3463   INITTYPE(gaeadkey, root);
3464   INITTYPE(gcaeadaad, type);
3465   INITTYPE(gaeadaad, root);
3466   INITTYPE(gcaeadenc, type);
3467   INITTYPE(gaeadenc, root);
3468   INITTYPE(gcaeaddec, type);
3469   INITTYPE(gaeaddec, root);
3470   INITTYPE(gchash, type);
3471   INITTYPE(ghash, root);
3472   INITTYPE(gcmac, type);
3473   INITTYPE(gmac, type);
3474   INITTYPE(gmhash, ghash);
3475   INITTYPE(poly1305cls, type);
3476   INITTYPE_META(poly1305key, type, poly1305cls);
3477   INITTYPE(poly1305hash, root);
3478   INITTYPE(kxvik, root);
3479   INITTYPE(shake, root);
3480   INITTYPE(shake128, shake);
3481   INITTYPE(shake256, shake);
3482   INITTYPE(gcprp, type);
3483   INITTYPE(gprp, root);
3484   addmethods(methods);
3485 }
3486
3487 GEN(gcciphers, cipher)
3488 GEN(gcaeads, aead)
3489 GEN(gchashes, hash)
3490 GEN(gcmacs, mac)
3491 #define gcprp prpinfo
3492 GEN(gcprps, prp)
3493
3494 void algorithms_pyinsert(PyObject *mod)
3495 {
3496   PyObject *d;
3497   INSERT("KeySZ", keysz_pytype);
3498   INSERT("KeySZAny", keyszany_pytype);
3499   INSERT("KeySZRange", keyszrange_pytype);
3500   INSERT("KeySZSet", keyszset_pytype);
3501   INSERT("GCCipher", gccipher_pytype);
3502   INSERT("GCipher", gcipher_pytype);
3503   INSERT("gcciphers", gcciphers());
3504   INSERT("GCAEAD", gcaead_pytype);
3505   INSERT("GAEKey", gaeadkey_pytype);
3506   INSERT("GAEAADClass", gcaeadaad_pytype);
3507   INSERT("GAEAAD", gaeadaad_pytype);
3508   INSERT("GAEEncClass", gcaeadenc_pytype);
3509   INSERT("GAEEnc", gaeadenc_pytype);
3510   INSERT("GAEDecClass", gcaeaddec_pytype);
3511   INSERT("GAEDec", gaeaddec_pytype);
3512   INSERT("gcaeads", gcaeads());
3513   INSERT("GCHash", gchash_pytype);
3514   INSERT("GHash", ghash_pytype);
3515   INSERT("gchashes", d = gchashes());
3516   sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3517   has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3518   INSERT("GCMAC", gcmac_pytype);
3519   INSERT("GMAC", gmac_pytype);
3520   INSERT("GMACHash", gmhash_pytype);
3521   INSERT("gcmacs", gcmacs());
3522   INSERT("Poly1305Class", poly1305cls_pytype);
3523   INSERT("poly1305", poly1305key_pytype);
3524   INSERT("Poly1305Hash", poly1305hash_pytype);
3525   INSERT("Keccak1600", kxvik_pytype);
3526   INSERT("Shake", shake_pytype);
3527   INSERT("Shake128", shake128_pytype);
3528   INSERT("Shake256", shake256_pytype);
3529   INSERT("GCPRP", gcprp_pytype);
3530   INSERT("GPRP", gprp_pytype);
3531   INSERT("gcprps", gcprps());
3532 }
3533
3534 /*----- That's all, folks -------------------------------------------------*/