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

   1 /* -*-c-*-
   2  *
   3  * Symmetric cryptography
   4  *
   5  * (c) 2004 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Python interface to Catacomb.
  11  *
  12  * Catacomb/Python is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Catacomb/Python is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include "catacomb-python.h"
  30 PUBLIC_SYMBOLS;
  31 #include "algorithms.h"
  32 PRIVATE_SYMBOLS;
  33
  34 /*----- Key sizes ---------------------------------------------------------*/
  35
  36 static PyTypeObject *keysz_pytype;
  37 static PyTypeObject *keyszany_pytype, *keyszrange_pytype, *keyszset_pytype;
  38
  39 typedef struct keysz_pyobj {
  40   PyObject_HEAD
  41   int dfl;
  42 } keysz_pyobj;
  43
  44 typedef struct keyszrange_pyobj {
  45   PyObject_HEAD
  46   int dfl;
  47   int min, max, mod;
  48 } keyszrange_pyobj;
  49
  50 typedef struct keyszset_pyobj {
  51   PyObject_HEAD
  52   int dfl;
  53   PyObject *set;
  54 } keyszset_pyobj;
  55
  56 #define KEYSZ_PYCHECK(o) PyObject_TypeCheck((o), keysz_pytype)
  57
  58 #ifndef KSZ_OPMASK
  59 #  define KSZ_OPMASK 0x1f
  60 #endif
  61
  62 #ifndef KSZ_16BIT
  63 #  define KSZ_16BIT 0x20
  64 #endif
  65
  66 PyObject *keysz_pywrap(const octet *k)
  67 {
  68   unsigned op = *k++;
  69 #define ARG(i) (op&KSZ_16BIT ? LOAD16(k + 2*(i)) : k[i])
  70   switch (op&KSZ_OPMASK) {
  71     case KSZ_ANY: {
  72       keysz_pyobj *o = PyObject_New(keysz_pyobj, keyszany_pytype);
  73       o->dfl = ARG(0);
  74       return ((PyObject *)o);
  75     } break;
  76     case KSZ_RANGE: {
  77       keyszrange_pyobj *o =
  78         PyObject_New(keyszrange_pyobj, keyszrange_pytype);
  79       o->dfl = ARG(0);
  80       o->min = ARG(1);
  81       o->max = ARG(2);
  82       o->mod = ARG(3);
  83       if (!o->mod) o->mod = 1;
  84       return ((PyObject *)o);
  85     } break;
  86     case KSZ_SET: {
  87       keyszset_pyobj *o =
  88         PyObject_New(keyszset_pyobj, keyszset_pytype);
  89       int i, n;
  90       o->dfl = ARG(0);
  91       for (i = 0; ARG(i); i++) ;
  92       n = i; o->set = PyTuple_New(n);
  93       for (i = 0; i < n; i++)
  94         PyTuple_SET_ITEM(o->set, i, PyInt_FromLong(ARG(i)));
  95       return ((PyObject *)o);
  96     } break;
  97     default:
  98       abort();
  99   }
 100 #undef ARG
 101 }
 102
 103 static PyObject *keyszany_pynew(PyTypeObject *ty,
 104                                 PyObject *arg, PyObject *kw)
 105 {
 106   static const char *const kwlist[] = { "default", 0 };
 107   int dfl;
 108   keysz_pyobj *o;
 109
 110   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", KWLIST, &dfl))
 111     goto end;
 112   if (dfl < 0) VALERR("key size cannot be negative");
 113   o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
 114   o->dfl = dfl;
 115   return ((PyObject *)o);
 116 end:
 117   return (0);
 118 }
 119
 120 static PyObject *keyszrange_pynew(PyTypeObject *ty,
 121                                   PyObject *arg, PyObject *kw)
 122 {
 123   static const char *const kwlist[] = { "default", "min", "max", "mod", 0 };
 124   int dfl, min = 0, max = 0, mod = 1;
 125   keyszrange_pyobj *o;
 126
 127   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iii:new", KWLIST,
 128                                    &dfl, &min, &max, &mod))
 129     goto end;
 130   if (dfl < 0 || min < 0) VALERR("key size cannot be negative");
 131   if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
 132   if (mod <= 0 || dfl%mod || min%mod || max%mod)
 133     VALERR("bad key size modulus");
 134   o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
 135   o->dfl = dfl;
 136   o->min = min;
 137   o->max = max;
 138   o->mod = mod;
 139   return ((PyObject *)o);
 140 end:
 141   return (0);
 142 }
 143
 144 static PyObject *keyszset_pynew(PyTypeObject *ty,
 145                                 PyObject *arg, PyObject *kw)
 146 {
 147   static const char *const kwlist[] = { "default", "set", 0 };
 148   int dfl, i, n, xx;
 149   PyObject *set = 0;
 150   PyObject *x = 0, *l = 0;
 151   keyszset_pyobj *o = 0;
 152
 153   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
 154     goto end;
 155   if (!set) set = PyTuple_New(0);
 156   else Py_INCREF(set);
 157   if (!PySequence_Check(set)) TYERR("want a sequence");
 158   n = PySequence_Size(set); if (n < 0) goto end;
 159   l = PyList_New(0); if (!l) goto end;
 160   if (dfl < 0) VALERR("key size cannot be negative");
 161   x = PyInt_FromLong(dfl);
 162   PyList_Append(l, x);
 163   Py_DECREF(x);
 164   x = 0;
 165   for (i = 0; i < n; i++) {
 166     if ((x = PySequence_GetItem(set, i)) == 0) goto end;
 167     xx = PyInt_AsLong(x);
 168     if (PyErr_Occurred()) goto end;
 169     if (xx == dfl) continue;
 170     if (xx < 0) VALERR("key size cannot be negative");
 171     PyList_Append(l, x);
 172     Py_DECREF(x);
 173     x = 0;
 174   }
 175   Py_DECREF(set);
 176   if ((set = PySequence_Tuple(l)) == 0) goto end;
 177   o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
 178   o->dfl = dfl;
 179   o->set = set;
 180   Py_INCREF(set);
 181 end:
 182   Py_XDECREF(set);
 183   Py_XDECREF(l);
 184   Py_XDECREF(x);
 185   return ((PyObject *)o);
 186 }
 187
 188 static PyObject *kaget_min(PyObject *me, void *hunoz)
 189   { return (PyInt_FromLong(0)); }
 190 #define kaget_max kaget_min
 191
 192 static PyObject *ksget_min(PyObject *me, void *hunoz)
 193 {
 194   PyObject *set = ((keyszset_pyobj *)me)->set;
 195   int i, n, y, x = -1;
 196   n = PyTuple_GET_SIZE(set);
 197   for (i = 0; i < n; i++) {
 198     y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
 199     if (x == -1 || y < x) x = y;
 200   }
 201   return (PyInt_FromLong(x));
 202 }
 203
 204 static PyObject *ksget_max(PyObject *me, void *hunoz)
 205 {
 206   PyObject *set = ((keyszset_pyobj *)me)->set;
 207   int i, n, y, x = -1;
 208   n = PyTuple_GET_SIZE(set);
 209   for (i = 0; i < n; i++) {
 210     y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
 211     if (y > x) x = y;
 212   }
 213   return (PyInt_FromLong(x));
 214 }
 215
 216 static const PyMemberDef keysz_pymembers[] = {
 217 #define MEMBERSTRUCT keysz_pyobj
 218   MEMRNM(default, T_INT, dfl, READONLY, "KSZ.default -> default key size")
 219 #undef MEMBERSTRUCT
 220   { 0 }
 221 };
 222
 223 #define KSZCONVOP(op)                                                   \
 224   static PyObject *kszmeth_##op(PyObject *me, PyObject *arg)            \
 225   {                                                                     \
 226     double x, y;                                                        \
 227     if (!PyArg_ParseTuple(arg, "d:" #op, &x)) return (0);               \
 228     y = keysz_##op(x);                                                  \
 229     return (PyFloat_FromDouble(y));                                     \
 230   }
 231 KSZCONVOP(fromdl)
 232 KSZCONVOP(fromschnorr)
 233 KSZCONVOP(fromif)
 234 KSZCONVOP(fromec)
 235 KSZCONVOP(todl)
 236 KSZCONVOP(toschnorr)
 237 KSZCONVOP(toif)
 238 KSZCONVOP(toec)
 239 #undef KSZCONVOP
 240
 241 static const PyMethodDef keysz_pymethods[] = {
 242 #define METHNAME(name) kszmeth_##name
 243   SMTH  (fromdl,        "fromdl(N) -> M: "
 244                     "convert integer discrete log field size to work factor")
 245   SMTH  (fromschnorr, "fromschnorr(N) -> M: "
 246                                 "convert Schnorr group order to work factor")
 247   SMTH  (fromif,        "fromif(N) -> M: "
 248                  "convert integer factorization problem size to work factor")
 249   SMTH  (fromec,        "fromec(N) -> M: "
 250                          "convert elliptic curve group order to work factor")
 251   SMTH  (todl,          "todl(N) -> M: "
 252                     "convert work factor to integer discrete log field size")
 253   SMTH  (toschnorr,     "toschnorr(N) -> M: "
 254                                 "convert work factor to Schnorr group order")
 255   SMTH  (toif,          "toif(N) -> M: "
 256                  "convert work factor to integer factorization problem size")
 257   SMTH  (toec,          "toec(N) -> M: "
 258                          "convert work factor to elliptic curve group order")
 259   SMTH  (toec,          "toec(N) -> M: "
 260                          "convert work factor to elliptic curve group order")
 261 #undef METHNAME
 262   { 0 }
 263 };
 264
 265 static const PyGetSetDef keyszany_pygetset[] = {
 266 #define GETSETNAME(op, name) ka##op##_##name
 267   GET   (min,           "KSZ.min -> smallest allowed key size")
 268   GET   (max,           "KSZ.max -> largest allowed key size")
 269 #undef GETSETNAME
 270   { 0 }
 271 };
 272
 273 static const PyMemberDef keyszrange_pymembers[] = {
 274 #define MEMBERSTRUCT keyszrange_pyobj
 275   MEMBER(min,   T_INT,    READONLY, "KSZ.min -> smallest allowed key size")
 276   MEMBER(max,   T_INT,    READONLY, "KSZ.max -> largest allowed key size")
 277   MEMBER(mod,   T_INT,    READONLY,
 278                             "KSZ.mod -> key size must be a multiple of this")
 279 #undef MEMBERSTRUCT
 280   { 0 }
 281 };
 282
 283 static const PyGetSetDef keyszset_pygetset[] = {
 284 #define GETSETNAME(op, name) ks##op##_##name
 285   GET   (min,           "KSZ.min -> smallest allowed key size")
 286   GET   (max,           "KSZ.max -> largest allowed key size")
 287 #undef GETSETNAME
 288   { 0 }
 289 };
 290
 291 static const PyMemberDef keyszset_pymembers[] = {
 292 #define MEMBERSTRUCT keyszset_pyobj
 293   MEMBER(set,   T_OBJECT, READONLY, "KSZ.set -> allowed key sizes")
 294 #undef MEMBERSTRUCT
 295   { 0 }
 296 };
 297
 298 static const PyTypeObject keysz_pytype_skel = {
 299   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 300   "KeySZ",                              /* @tp_name@ */
 301   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 302   0,                                    /* @tp_itemsize@ */
 303
 304   0,                                    /* @tp_dealloc@ */
 305   0,                                    /* @tp_print@ */
 306   0,                                    /* @tp_getattr@ */
 307   0,                                    /* @tp_setattr@ */
 308   0,                                    /* @tp_compare@ */
 309   0,                                    /* @tp_repr@ */
 310   0,                                    /* @tp_as_number@ */
 311   0,                                    /* @tp_as_sequence@ */
 312   0,                                    /* @tp_as_mapping@ */
 313   0,                                    /* @tp_hash@ */
 314   0,                                    /* @tp_call@ */
 315   0,                                    /* @tp_str@ */
 316   0,                                    /* @tp_getattro@ */
 317   0,                                    /* @tp_setattro@ */
 318   0,                                    /* @tp_as_buffer@ */
 319   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 320     Py_TPFLAGS_BASETYPE,
 321
 322   /* @tp_doc@ */
 323   "Key size constraints.  Abstract.",
 324
 325   0,                                    /* @tp_traverse@ */
 326   0,                                    /* @tp_clear@ */
 327   0,                                    /* @tp_richcompare@ */
 328   0,                                    /* @tp_weaklistoffset@ */
 329   0,                                    /* @tp_iter@ */
 330   0,                                    /* @tp_iternext@ */
 331   PYMETHODS(keysz),                     /* @tp_methods@ */
 332   PYMEMBERS(keysz),                     /* @tp_members@ */
 333   0,                                    /* @tp_getset@ */
 334   0,                                    /* @tp_base@ */
 335   0,                                    /* @tp_dict@ */
 336   0,                                    /* @tp_descr_get@ */
 337   0,                                    /* @tp_descr_set@ */
 338   0,                                    /* @tp_dictoffset@ */
 339   0,                                    /* @tp_init@ */
 340   PyType_GenericAlloc,                  /* @tp_alloc@ */
 341   abstract_pynew,                       /* @tp_new@ */
 342   0,                                    /* @tp_free@ */
 343   0                                     /* @tp_is_gc@ */
 344 };
 345
 346 static const PyTypeObject keyszany_pytype_skel = {
 347   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 348   "KeySZAny",                           /* @tp_name@ */
 349   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 350   0,                                    /* @tp_itemsize@ */
 351
 352   0,                                    /* @tp_dealloc@ */
 353   0,                                    /* @tp_print@ */
 354   0,                                    /* @tp_getattr@ */
 355   0,                                    /* @tp_setattr@ */
 356   0,                                    /* @tp_compare@ */
 357   0,                                    /* @tp_repr@ */
 358   0,                                    /* @tp_as_number@ */
 359   0,                                    /* @tp_as_sequence@ */
 360   0,                                    /* @tp_as_mapping@ */
 361   0,                                    /* @tp_hash@ */
 362   0,                                    /* @tp_call@ */
 363   0,                                    /* @tp_str@ */
 364   0,                                    /* @tp_getattro@ */
 365   0,                                    /* @tp_setattro@ */
 366   0,                                    /* @tp_as_buffer@ */
 367   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 368     Py_TPFLAGS_BASETYPE,
 369
 370   /* @tp_doc@ */
 371   "KeySZAny(DEFAULT)\n"
 372   "  Key size constraints.  This object imposes no constraints on size.",
 373
 374   0,                                    /* @tp_traverse@ */
 375   0,                                    /* @tp_clear@ */
 376   0,                                    /* @tp_richcompare@ */
 377   0,                                    /* @tp_weaklistoffset@ */
 378   0,                                    /* @tp_iter@ */
 379   0,                                    /* @tp_iternext@ */
 380   0,                                    /* @tp_methods@ */
 381   0,                                    /* @tp_members@ */
 382   PYGETSET(keyszany),                   /* @tp_getset@ */
 383   0,                                    /* @tp_base@ */
 384   0,                                    /* @tp_dict@ */
 385   0,                                    /* @tp_descr_get@ */
 386   0,                                    /* @tp_descr_set@ */
 387   0,                                    /* @tp_dictoffset@ */
 388   0,                                    /* @tp_init@ */
 389   PyType_GenericAlloc,                  /* @tp_alloc@ */
 390   keyszany_pynew,                       /* @tp_new@ */
 391   0,                                    /* @tp_free@ */
 392   0                                     /* @tp_is_gc@ */
 393 };
 394
 395 static const PyTypeObject keyszrange_pytype_skel = {
 396   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 397   "KeySZRange",                         /* @tp_name@ */
 398   sizeof(keyszrange_pyobj),             /* @tp_basicsize@ */
 399   0,                                    /* @tp_itemsize@ */
 400
 401   0,                                    /* @tp_dealloc@ */
 402   0,                                    /* @tp_print@ */
 403   0,                                    /* @tp_getattr@ */
 404   0,                                    /* @tp_setattr@ */
 405   0,                                    /* @tp_compare@ */
 406   0,                                    /* @tp_repr@ */
 407   0,                                    /* @tp_as_number@ */
 408   0,                                    /* @tp_as_sequence@ */
 409   0,                                    /* @tp_as_mapping@ */
 410   0,                                    /* @tp_hash@ */
 411   0,                                    /* @tp_call@ */
 412   0,                                    /* @tp_str@ */
 413   0,                                    /* @tp_getattro@ */
 414   0,                                    /* @tp_setattro@ */
 415   0,                                    /* @tp_as_buffer@ */
 416   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 417     Py_TPFLAGS_BASETYPE,
 418
 419   /* @tp_doc@ */
 420   "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n"
 421   "  Key size constraints: size must be between MIN and MAX inclusive, and\n"
 422   "  be a multiple of MOD.",
 423
 424   0,                                    /* @tp_traverse@ */
 425   0,                                    /* @tp_clear@ */
 426   0,                                    /* @tp_richcompare@ */
 427   0,                                    /* @tp_weaklistoffset@ */
 428   0,                                    /* @tp_iter@ */
 429   0,                                    /* @tp_iternext@ */
 430   0,                                    /* @tp_methods@ */
 431   PYMEMBERS(keyszrange),                /* @tp_members@ */
 432   0,                                    /* @tp_getset@ */
 433   0,                                    /* @tp_base@ */
 434   0,                                    /* @tp_dict@ */
 435   0,                                    /* @tp_descr_get@ */
 436   0,                                    /* @tp_descr_set@ */
 437   0,                                    /* @tp_dictoffset@ */
 438   0,                                    /* @tp_init@ */
 439   PyType_GenericAlloc,                  /* @tp_alloc@ */
 440   keyszrange_pynew,                     /* @tp_new@ */
 441   0,                                    /* @tp_free@ */
 442   0                                     /* @tp_is_gc@ */
 443 };
 444
 445 static const PyTypeObject keyszset_pytype_skel = {
 446   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 447   "KeySZSet",                           /* @tp_name@ */
 448   sizeof(keyszset_pyobj),               /* @tp_basicsize@ */
 449   0,                                    /* @tp_itemsize@ */
 450
 451   0,                                    /* @tp_dealloc@ */
 452   0,                                    /* @tp_print@ */
 453   0,                                    /* @tp_getattr@ */
 454   0,                                    /* @tp_setattr@ */
 455   0,                                    /* @tp_compare@ */
 456   0,                                    /* @tp_repr@ */
 457   0,                                    /* @tp_as_number@ */
 458   0,                                    /* @tp_as_sequence@ */
 459   0,                                    /* @tp_as_mapping@ */
 460   0,                                    /* @tp_hash@ */
 461   0,                                    /* @tp_call@ */
 462   0,                                    /* @tp_str@ */
 463   0,                                    /* @tp_getattro@ */
 464   0,                                    /* @tp_setattro@ */
 465   0,                                    /* @tp_as_buffer@ */
 466   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 467     Py_TPFLAGS_BASETYPE,
 468
 469   /* @tp_doc@ */
 470   "KeySZSet(DEFAULT, SEQ)\n"
 471   "  Key size constraints: size must be DEFAULT or an element of SEQ.",
 472
 473   0,                                    /* @tp_traverse@ */
 474   0,                                    /* @tp_clear@ */
 475   0,                                    /* @tp_richcompare@ */
 476   0,                                    /* @tp_weaklistoffset@ */
 477   0,                                    /* @tp_iter@ */
 478   0,                                    /* @tp_iternext@ */
 479   0,                                    /* @tp_methods@ */
 480   PYMEMBERS(keyszset),                  /* @tp_members@ */
 481   PYGETSET(keyszset),                   /* @tp_getset@ */
 482   0,                                    /* @tp_base@ */
 483   0,                                    /* @tp_dict@ */
 484   0,                                    /* @tp_descr_get@ */
 485   0,                                    /* @tp_descr_set@ */
 486   0,                                    /* @tp_dictoffset@ */
 487   0,                                    /* @tp_init@ */
 488   PyType_GenericAlloc,                  /* @tp_alloc@ */
 489   keyszset_pynew,                       /* @tp_new@ */
 490   0,                                    /* @tp_free@ */
 491   0                                     /* @tp_is_gc@ */
 492 };
 493
 494 /*----- Symmetric encryption ----------------------------------------------*/
 495
 496 static PyTypeObject *gccipher_pytype, *gcipher_pytype;
 497
 498 typedef struct gccipher_pyobj {
 499   PyHeapTypeObject ty;
 500   gccipher *cc;
 501 } gccipher_pyobj;
 502
 503 #define GCCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gccipher_pytype)
 504 #define GCCIPHER_CC(o) (((gccipher_pyobj *)(o))->cc)
 505
 506 typedef struct gcipher_pyobj {
 507   PyObject_HEAD
 508   gcipher *c;
 509 } gcipher_pyobj;
 510
 511 #define GCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gcipher_pytype)
 512 #define GCIPHER_C(o) (((gcipher_pyobj *)(o))->c)
 513
 514 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
 515
 516 static PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
 517 {
 518   gcipher_pyobj *g;
 519   if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
 520   else Py_INCREF(cobj);
 521   g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
 522   g->c = c;
 523   return ((PyObject *)g);
 524 }
 525
 526 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 527 {
 528   static const char *const kwlist[] = { "k", 0 };
 529   struct bin k;
 530
 531   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
 532     goto end;
 533   if (keysz(k.sz, GCCIPHER_CC(ty)->keysz) != k.sz) VALERR("bad key length");
 534   return (gcipher_pywrap((PyObject *)ty,
 535                          GC_INIT(GCCIPHER_CC(ty), k.p, k.sz)));
 536 end:
 537   return (0);
 538 }
 539
 540 PyObject *gccipher_pywrap(gccipher *cc)
 541 {
 542   gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
 543   g->cc = cc;
 544   g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
 545   g->ty.ht_type.tp_base = gcipher_pytype;
 546   Py_INCREF(gcipher_pytype);
 547   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 548                             Py_TPFLAGS_BASETYPE |
 549                             Py_TPFLAGS_HEAPTYPE);
 550   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 551   g->ty.ht_type.tp_free = 0;
 552   g->ty.ht_type.tp_new = gcipher_pynew;
 553   typeready(&g->ty.ht_type);
 554   return ((PyObject *)g);
 555 }
 556
 557 static void gcipher_pydealloc(PyObject *me)
 558 {
 559   GC_DESTROY(GCIPHER_C(me));
 560   Py_DECREF(Py_TYPE(me));
 561   FREEOBJ(me);
 562 }
 563
 564 static PyObject *gccget_name(PyObject *me, void *hunoz)
 565   { return (TEXT_FROMSTR(GCCIPHER_CC(me)->name)); }
 566
 567 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
 568   { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
 569
 570 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
 571   { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
 572
 573 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
 574 {
 575   struct bin m;
 576   PyObject *rc = 0;
 577
 578   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) return (0);
 579   rc = bytestring_pywrap(0, m.sz);
 580   GC_ENCRYPT(GCIPHER_C(me), m.p, BIN_PTR(rc), m.sz);
 581   return (rc);
 582 }
 583
 584 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
 585 {
 586   char *p;
 587   int sz;
 588   PyObject *rc = 0;
 589
 590   if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
 591   rc = bytestring_pywrap(0, sz);
 592   p = BIN_PTR(rc);
 593   memset(p, 0, sz);
 594   GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
 595   return (rc);
 596 }
 597
 598 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
 599 {
 600   struct bin c;
 601   PyObject *rc = 0;
 602
 603   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) return (0);
 604   rc = bytestring_pywrap(0, c.sz);
 605   GC_DECRYPT(GCIPHER_C(me), c.p, BIN_PTR(rc), c.sz);
 606   return (rc);
 607 }
 608
 609 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
 610 {
 611   char *p;
 612   int sz;
 613   PyObject *rc = 0;
 614
 615   if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
 616   rc = bytestring_pywrap(0, sz);
 617   p = BIN_PTR(rc);
 618   memset(p, 0, sz);
 619   GC_DECRYPT(GCIPHER_C(me), p, p, sz);
 620   return (rc);
 621 }
 622
 623 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
 624 {
 625   struct bin iv;
 626
 627   if (!PyArg_ParseTuple(arg, "O&:setiv", convbin, &iv)) goto end;
 628   if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
 629   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 630   if (iv.sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
 631   GC_SETIV(GCIPHER_C(me), iv.p);
 632   RETURN_ME;
 633 end:
 634   return (0);
 635 }
 636
 637 static PyObject *gcmeth_bdry(PyObject *me)
 638 {
 639   if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
 640   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 641   GC_BDRY(GCIPHER_C(me));
 642   RETURN_ME;
 643 end:
 644   return (0);
 645 }
 646
 647 static const PyGetSetDef gccipher_pygetset[] = {
 648 #define GETSETNAME(op, name) gcc##op##_##name
 649   GET   (keysz,         "CC.keysz -> acceptable key sizes")
 650   GET   (blksz,         "CC.blksz -> block size, or zero")
 651   GET   (name,          "CC.name -> name of this kind of cipher")
 652 #undef GETSETNAME
 653   { 0 }
 654 };
 655
 656 static const PyMethodDef gcipher_pymethods[] = {
 657 #define METHNAME(name) gcmeth_##name
 658   METH  (encrypt,       "C.encrypt(PT) -> CT")
 659   METH  (enczero,       "C.enczero(N) -> CT")
 660   METH  (decrypt,       "C.decrypt(CT) -> PT")
 661   METH  (deczero,       "C.deczero(N) -> PT")
 662   METH  (setiv,         "C.setiv(IV)")
 663   NAMETH(bdry,          "C.bdry()")
 664 #undef METHNAME
 665   { 0 }
 666 };
 667
 668 static const PyTypeObject gccipher_pytype_skel = {
 669   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 670   "GCCipher",                           /* @tp_name@ */
 671   sizeof(gccipher_pyobj),               /* @tp_basicsize@ */
 672   0,                                    /* @tp_itemsize@ */
 673
 674   0,                                    /* @tp_dealloc@ */
 675   0,                                    /* @tp_print@ */
 676   0,                                    /* @tp_getattr@ */
 677   0,                                    /* @tp_setattr@ */
 678   0,                                    /* @tp_compare@ */
 679   0,                                    /* @tp_repr@ */
 680   0,                                    /* @tp_as_number@ */
 681   0,                                    /* @tp_as_sequence@ */
 682   0,                                    /* @tp_as_mapping@ */
 683   0,                                    /* @tp_hash@ */
 684   0,                                    /* @tp_call@ */
 685   0,                                    /* @tp_str@ */
 686   0,                                    /* @tp_getattro@ */
 687   0,                                    /* @tp_setattro@ */
 688   0,                                    /* @tp_as_buffer@ */
 689   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 690     Py_TPFLAGS_BASETYPE,
 691
 692   /* @tp_doc@ */
 693   "Symmetric cipher metaclass.",
 694
 695   0,                                    /* @tp_traverse@ */
 696   0,                                    /* @tp_clear@ */
 697   0,                                    /* @tp_richcompare@ */
 698   0,                                    /* @tp_weaklistoffset@ */
 699   0,                                    /* @tp_iter@ */
 700   0,                                    /* @tp_iternext@ */
 701   0,                                    /* @tp_methods@ */
 702   0,                                    /* @tp_members@ */
 703   PYGETSET(gccipher),                   /* @tp_getset@ */
 704   0,                                    /* @tp_base@ */
 705   0,                                    /* @tp_dict@ */
 706   0,                                    /* @tp_descr_get@ */
 707   0,                                    /* @tp_descr_set@ */
 708   0,                                    /* @tp_dictoffset@ */
 709   0,                                    /* @tp_init@ */
 710   PyType_GenericAlloc,                  /* @tp_alloc@ */
 711   abstract_pynew,                       /* @tp_new@ */
 712   0,                                    /* @tp_free@ */
 713   0                                     /* @tp_is_gc@ */
 714 };
 715
 716 static const PyTypeObject gcipher_pytype_skel = {
 717   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 718   "GCipher",                            /* @tp_name@ */
 719   sizeof(gcipher_pyobj),                /* @tp_basicsize@ */
 720   0,                                    /* @tp_itemsize@ */
 721
 722   gcipher_pydealloc,                    /* @tp_dealloc@ */
 723   0,                                    /* @tp_print@ */
 724   0,                                    /* @tp_getattr@ */
 725   0,                                    /* @tp_setattr@ */
 726   0,                                    /* @tp_compare@ */
 727   0,                                    /* @tp_repr@ */
 728   0,                                    /* @tp_as_number@ */
 729   0,                                    /* @tp_as_sequence@ */
 730   0,                                    /* @tp_as_mapping@ */
 731   0,                                    /* @tp_hash@ */
 732   0,                                    /* @tp_call@ */
 733   0,                                    /* @tp_str@ */
 734   0,                                    /* @tp_getattro@ */
 735   0,                                    /* @tp_setattro@ */
 736   0,                                    /* @tp_as_buffer@ */
 737   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 738     Py_TPFLAGS_BASETYPE,
 739
 740   /* @tp_doc@ */
 741   "Symmetric cipher, abstract base class.",
 742
 743   0,                                    /* @tp_traverse@ */
 744   0,                                    /* @tp_clear@ */
 745   0,                                    /* @tp_richcompare@ */
 746   0,                                    /* @tp_weaklistoffset@ */
 747   0,                                    /* @tp_iter@ */
 748   0,                                    /* @tp_iternext@ */
 749   PYMETHODS(gcipher),                   /* @tp_methods@ */
 750   0,                                    /* @tp_members@ */
 751   0,                                    /* @tp_getset@ */
 752   0,                                    /* @tp_base@ */
 753   0,                                    /* @tp_dict@ */
 754   0,                                    /* @tp_descr_get@ */
 755   0,                                    /* @tp_descr_set@ */
 756   0,                                    /* @tp_dictoffset@ */
 757   0,                                    /* @tp_init@ */
 758   PyType_GenericAlloc,                  /* @tp_alloc@ */
 759   abstract_pynew,                       /* @tp_new@ */
 760   0,                                    /* @tp_free@ */
 761   0                                     /* @tp_is_gc@ */
 762 };
 763
 764 /*----- Authenticated encryption ------------------------------------------*/
 765
 766 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
 767 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
 768 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
 769 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
 770
 771 typedef struct gcaead_pyobj {
 772   PyHeapTypeObject ty;
 773   gcaead *aec;
 774   struct gcaeadaad_pyobj *aad;
 775   struct gcaeadenc_pyobj *enc;
 776   struct gcaeaddec_pyobj *dec;
 777 } gcaead_pyobj;
 778
 779 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
 780 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
 781 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
 782 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
 783 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
 784 static PyObject *gcaead_pywrap(gcaead *);
 785
 786 typedef struct gaeadkey_pyobj {
 787   PyObject_HEAD
 788   gaead_key *k;
 789 } gaeadkey_pyobj;
 790
 791 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
 792 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
 793
 794 typedef struct gcaeadaad_pyobj {
 795   PyHeapTypeObject ty;
 796   gcaead_pyobj *key;
 797 } gcaeadaad_pyobj;
 798
 799 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
 800 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
 801
 802 typedef struct gaeadaad_pyobj {
 803   PyObject_HEAD
 804   gaead_aad *a;
 805   unsigned f;
 806 #define AEADF_DEAD 32768u
 807   size_t hsz, hlen;
 808 } gaeadaad_pyobj;
 809
 810 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
 811 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
 812 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
 813 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
 814 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
 815
 816 typedef struct gcaeadenc_pyobj {
 817   PyHeapTypeObject ty;
 818   gcaead_pyobj *key;
 819 } gcaeadenc_pyobj;
 820
 821 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
 822 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
 823                                  size_t, size_t, size_t);
 824
 825 typedef struct gaeadenc_pyobj {
 826   PyObject_HEAD
 827   gaead_enc *e;
 828   gaeadaad_pyobj *aad;
 829   unsigned f;
 830   size_t hsz, msz, tsz;
 831   size_t mlen;
 832 } gaeadenc_pyobj;
 833
 834 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
 835 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
 836 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
 837 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
 838 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
 839 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
 840 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
 841 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
 842
 843 typedef struct gcaeaddec_pyobj {
 844   PyHeapTypeObject ty;
 845   gcaead_pyobj *key;
 846 } gcaeaddec_pyobj;
 847
 848 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
 849 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
 850                                  size_t, size_t, size_t);
 851
 852 typedef struct gaeaddec_pyobj {
 853   PyObject_HEAD
 854   gaead_dec *d;
 855   gaeadaad_pyobj *aad;
 856   unsigned f;
 857   size_t hsz, csz, tsz;
 858   size_t clen;
 859 } gaeaddec_pyobj;
 860
 861 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
 862 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
 863 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
 864 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
 865 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
 866 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
 867 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
 868 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
 869
 870 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
 871 {
 872   gaeadkey_pyobj *gk;
 873
 874   if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
 875   else Py_INCREF(cobj);
 876   gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
 877   gk->k = k;
 878   return ((PyObject *)gk);
 879 }
 880
 881 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
 882                                 PyObject *arg, PyObject *kw)
 883 {
 884   static const char *const kwlist[] = { "k", 0 };
 885   struct bin k;
 886
 887   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
 888     goto end;
 889   if (keysz(k.sz, GCAEAD_AEC(ty)->keysz) != k.sz) VALERR("bad key length");
 890   return (gaeadkey_pywrap((PyObject *)ty,
 891                           GAEAD_KEY(GCAEAD_AEC(ty), k.p, k.sz)));
 892 end:
 893   return (0);
 894 }
 895
 896 static PyObject *gcaead_pywrap(gcaead *aec)
 897 {
 898   gcaead_pyobj *gck;
 899   gcaeadaad_pyobj *gca;
 900   gcaeadenc_pyobj *gce;
 901   gcaeaddec_pyobj *gcd;
 902
 903 #define MKTYPE(obj, thing, newfn, namefmt) do {                         \
 904   (obj) = newtype(gcaead_pytype, 0, 0);                                 \
 905   (obj)->ty.ht_name = TEXT_FORMAT(namefmt, aec->name);                  \
 906   (obj)->ty.ht_type.tp_name = TEXT_PTR((obj)->ty.ht_name);              \
 907   (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj);        \
 908   (obj)->ty.ht_type.tp_base = gaead##thing##_pytype;                    \
 909   Py_INCREF(gaead##thing##_pytype);                                     \
 910   (obj)->ty.ht_type.tp_flags =                                          \
 911     (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE);   \
 912   (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc;                     \
 913   (obj)->ty.ht_type.tp_free = 0;                                        \
 914   (obj)->ty.ht_type.tp_new = newfn;                                     \
 915   typeready(&(obj)->ty.ht_type);                                        \
 916 } while (0)
 917
 918   MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
 919   MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
 920   MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
 921   MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
 922
 923 #undef MKTYPE
 924
 925   gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
 926   gca->key = gce->key = gcd->key = gck;
 927   return ((PyObject *)gck);
 928 }
 929
 930 static void gaeadkey_pydealloc(PyObject *me)
 931   { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
 932
 933 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
 934   { return (TEXT_FROMSTR(GCAEAD_AEC(me)->name)); }
 935
 936 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
 937   { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
 938
 939 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
 940   { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
 941
 942 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
 943   { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
 944
 945 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
 946   { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
 947
 948 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
 949   { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
 950
 951 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
 952   { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
 953
 954 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
 955   { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
 956
 957 static const PyGetSetDef gcaead_pygetset[] = {
 958 #define GETSETNAME(op, name) gcae##op##_##name
 959   GET   (keysz,         "AEC.keysz -> acceptable key sizes")
 960   GET   (noncesz,       "AEC.noncesz -> acceptable nonce sizes")
 961   GET   (tagsz,         "AEC.tagsz -> acceptable tag sizes")
 962   GET   (blksz,         "AEC.blksz -> block size, or zero")
 963   GET   (bufsz,         "AEC.bufsz -> amount of data buffered internally")
 964   GET   (ohd,           "AEC.ohd -> maximum encryption overhead")
 965   GET   (name,          "AEC.name -> name of this kind of AEAD scheme")
 966   GET   (flags,         "AEC.flags -> mask of `AEADF_...' flags")
 967 #undef GETSETNAME
 968   { 0 }
 969 };
 970
 971 static PyObject *gaekmeth_aad(PyObject *me)
 972 {
 973   const gaead_key *k = GAEADKEY_K(me);
 974   PyObject *rc = 0;
 975
 976   if (k->ops->c->f&AEADF_AADNDEP)
 977     VALERR("aad must be associated with enc/dec op");
 978   rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(Py_TYPE(me)),
 979                        GAEAD_AAD(k), 0, 0);
 980 end:
 981   return (rc);
 982 }
 983
 984 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
 985                              PyObject *hszobj, size_t *hsz_out,
 986                              PyObject *mszobj, size_t *msz_out,
 987                              PyObject *tszobj, size_t *tsz_out)
 988 {
 989   unsigned f = 0, miss;
 990   int rc = -1;
 991
 992   if (hszobj != Py_None)
 993     { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
 994   if (mszobj != Py_None)
 995     { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
 996   if (tszobj != Py_None)
 997     { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
 998   miss = aec->f&~f;
 999   if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1000   if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1001   if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1002   if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1003   if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1004     VALERR("bad tag length");
1005   *f_out = f | aec->f; rc = 0;
1006 end:
1007   return (rc);
1008 }
1009
1010 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1011 {
1012   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1013   const gaead_key *k = GAEADKEY_K(me);
1014   gaead_enc *e;
1015   PyObject *rc = 0;
1016   struct bin n;
1017   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1018   size_t hsz = 0, msz = 0, tsz = 0;
1019   unsigned f;
1020
1021   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1022                                    convbin, &n, &hszobj, &mszobj, &tszobj))
1023     goto end;
1024   if (check_aead_encdec(k->ops->c, &f, n.sz,
1025                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1026     goto end;
1027   e = GAEAD_ENC(GAEADKEY_K(me), n.p, n.sz, hsz, msz, tsz);
1028   if (!e) VALERR("bad aead parameter combination");
1029   rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(Py_TYPE(me)),
1030                        e, f, hsz, msz, tsz);
1031 end:
1032   return (rc);
1033 }
1034
1035 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1036 {
1037   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1038   const gaead_key *k = GAEADKEY_K(me);
1039   gaead_dec *d;
1040   PyObject *rc = 0;
1041   struct bin n;
1042   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1043   size_t hsz = 0, csz = 0, tsz = 0;
1044   unsigned f;
1045
1046   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:dec", KWLIST,
1047                                    convbin, &n, &hszobj, &cszobj, &tszobj))
1048     goto end;
1049   if (check_aead_encdec(k->ops->c, &f, n.sz,
1050                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1051     goto end;
1052   d = GAEAD_DEC(GAEADKEY_K(me), n.p, n.sz, hsz, csz, tsz);
1053   if (!d) VALERR("bad aead parameter combination");
1054   rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(Py_TYPE(me)),
1055                        d, f, hsz, csz, tsz);
1056 end:
1057   return (rc);
1058 }
1059
1060 static const PyMethodDef gaeadkey_pymethods[] = {
1061 #define METHNAME(name) gaekmeth_##name
1062   NAMETH(aad,           "KEY.aad() -> AAD")
1063   KWMETH(enc,           "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1064   KWMETH(dec,           "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1065 #undef METHNAME
1066   { 0 }
1067 };
1068
1069 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1070                                  unsigned f, size_t hsz)
1071 {
1072   gaeadaad_pyobj *ga;
1073
1074   assert(cobj); Py_INCREF(cobj);
1075   ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1076   ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1077   return ((PyObject *)ga);
1078 }
1079
1080 static void gaeadaad_pydealloc(PyObject *me)
1081 {
1082   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1083
1084   if (ga->a) GAEAD_DESTROY(ga->a);
1085   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1086 }
1087
1088 static int gaea_check(PyObject *me)
1089 {
1090   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1091   int rc = -1;
1092
1093   if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1094   rc = 0;
1095 end:
1096   return (rc);
1097 }
1098
1099 static void gaea_invalidate(gaeadaad_pyobj *ga)
1100   { if (ga) ga->f |= AEADF_DEAD; }
1101
1102 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1103 {
1104   gaeadaad_pyobj *ga = *ga_inout;
1105   if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1106 }
1107
1108 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1109 {
1110   if (gaea_check(me)) return (0);
1111   else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1112   else RETURN_NONE;
1113 }
1114
1115 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1116   { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1117
1118 static const PyGetSetDef gaeadaad_pygetset[] = {
1119 #define GETSETNAME(op, name) gaea##op##_##name
1120   GET   (hsz,           "AAD.hsz -> precommitted header length or `None'")
1121   GET   (hlen,          "AAD.hlen -> header length so far")
1122 #undef GETSETNAME
1123   { 0 }
1124 };
1125
1126 static PyObject *gaeameth_copy(PyObject *me)
1127 {
1128   PyObject *rc = 0;
1129
1130   if (gaea_check(me)) goto end;
1131   if (GAEADAAD_F(me)&AEADF_AADNDEP)
1132     VALERR("can't duplicate nonce-dependent aad");
1133   rc = gaeadaad_pywrap((PyObject *)Py_TYPE(me),
1134                        GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1135   GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1136 end:
1137   return (rc);
1138 }
1139
1140 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1141 {
1142   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1143   int rc = -1;
1144
1145   if (gaea_check(me)) goto end;
1146   if ((ga->f&AEADF_NOAAD) && hsz)
1147     VALERR("header data not permitted");
1148   if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1149     VALERR("too large for precommitted header length");
1150   GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1151   rc = 0;
1152 end:
1153   return (rc);
1154 }
1155
1156 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1157 {
1158   struct bin h;
1159
1160   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &h)) return (0);
1161   if (gaeadaad_hash(me, h.p, h.sz)) return (0);
1162   RETURN_ME;
1163 }
1164
1165 #define GAEAMETH_HASHU_(n, W, w)                                        \
1166   static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg)       \
1167   {                                                                     \
1168     uint##n x; octet b[SZ_##W];                                         \
1169     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1170     STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0);    \
1171     RETURN_ME;                                                          \
1172   }
1173 DOUINTCONV(GAEAMETH_HASHU_)
1174
1175 #define GAEAMETH_HASHBUF_(n, W, w)                                      \
1176   static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg)     \
1177   {                                                                     \
1178     struct bin in; octet b[SZ_##W];                                     \
1179     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
1180     if (in.sz > MASK##n) TYERR("string too long");                      \
1181     STORE##W(b, in.sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end;  \
1182     if (gaeadaad_hash(me, in.p, in.sz)) goto end;                       \
1183     RETURN_ME;                                                          \
1184   end:                                                                  \
1185     return (0);                                                         \
1186   }
1187 DOUINTCONV(GAEAMETH_HASHBUF_)
1188
1189 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1190 {
1191   char *p;
1192   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1193   if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1194   RETURN_ME;
1195 }
1196
1197 static const PyMethodDef gaeadaad_pymethods[] = {
1198 #define METHNAME(name) gaeameth_##name
1199   NAMETH(copy,          "AAD.copy() -> AAD'")
1200   METH  (hash,          "AAD.hash(H)")
1201 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1202   DOUINTCONV(METHU_)
1203 #undef METHU_
1204 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1205   DOUINTCONV(METHBUF_)
1206 #undef METHBUF_
1207   METH  (hashstrz,      "AAD.hashstrz(STRING)")
1208 #undef METHNAME
1209   { 0 }
1210 };
1211
1212 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1213                                  size_t hsz, size_t msz, size_t tsz)
1214 {
1215   gaeadenc_pyobj *ge;
1216
1217   assert(cobj); Py_INCREF(cobj);
1218   ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1219   ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1220   ge->aad = 0; ge->mlen = 0;
1221   return ((PyObject *)ge);
1222 }
1223
1224 static void gaeadenc_pydealloc(PyObject *me)
1225 {
1226   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1227
1228   gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1229   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1230 }
1231
1232 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1233 {
1234   if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1235   else RETURN_NONE;
1236 }
1237
1238 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1239 {
1240   if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1241   else RETURN_NONE;
1242 }
1243
1244 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1245 {
1246   if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1247   else RETURN_NONE;
1248 }
1249
1250 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1251   { return getulong(GAEADENC_MLEN(me)); }
1252
1253 static const PyGetSetDef gaeadenc_pygetset[] = {
1254 #define GETSETNAME(op, name) gaee##op##_##name
1255   GET   (hsz,           "ENC.hsz -> precommitted header length or `None'")
1256   GET   (msz,           "ENC.msz -> precommitted message length or `None'")
1257   GET   (tsz,           "ENC.tsz -> precommitted tag length or `None'")
1258   GET   (mlen,          "ENC.mlen -> message length so far")
1259 #undef GETSETNAME
1260   { 0 }
1261 };
1262
1263 static PyObject *gaeemeth_aad(PyObject *me)
1264 {
1265   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1266   PyObject *rc = 0;
1267
1268   if (!(ge->f&AEADF_AADNDEP))
1269     rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1270                          GAEAD_AAD(ge->e), 0, 0);
1271   else {
1272     if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1273       VALERR("too late for aad");
1274     if (!ge->aad)
1275       ge->aad = (gaeadaad_pyobj *)
1276         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1277                         GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1278                         ge->hsz);
1279     Py_INCREF(ge->aad);
1280     rc = (PyObject *)ge->aad;
1281   }
1282 end:
1283   return (rc);
1284 }
1285
1286 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1287 {
1288   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1289   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1290   struct bin n;
1291   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1292   size_t hsz = 0, msz = 0, tsz = 0;
1293   unsigned f;
1294
1295   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1296                                    convbin, &n, &hszobj, &mszobj, &tszobj))
1297     goto end;
1298   if (check_aead_encdec(ge->e->ops->c, &f, n.sz,
1299                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1300     goto end;
1301   if (GAEAD_REINIT(ge->e, n.p, n.sz, hsz, msz, tsz))
1302     VALERR("bad aead parameter combination");
1303   gaea_sever(&ge->aad);
1304   ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1305 end:
1306   return (0);
1307 }
1308
1309 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1310 {
1311   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1312   struct bin m;
1313   char *c = 0; size_t csz; buf b;
1314   int err;
1315   PyObject *rc = 0;
1316
1317   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
1318   if (ge->f&AEADF_AADFIRST) {
1319     if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1320       VALERR("header doesn't match precommitted length");
1321     gaea_invalidate(ge->aad);
1322   }
1323   if ((ge->f&AEADF_PCMSZ) && m.sz > ge->msz - ge->mlen)
1324     VALERR("too large for precommitted message length");
1325   csz = m.sz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1326   err = GAEAD_ENCRYPT(ge->e, m.p, m.sz, &b); assert(!err); (void)err;
1327   buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += m.sz;
1328 end:
1329   xfree(c);
1330   return (rc);
1331 }
1332
1333 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1334 {
1335   static const char *const kwlist[] = { "tsz", "aad", 0 };
1336   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1337   PyObject *aad = Py_None;
1338   char *c = 0; size_t csz; buf b;
1339   PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1340   int err;
1341   PyObject *rc = 0;
1342
1343   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1344                                    &tszobj, &aad))
1345     goto end;
1346   if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1347   if (aad != Py_None &&
1348       !PyObject_TypeCheck(aad,
1349                           (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1350     TYERR("wanted aad");
1351   if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1352     VALERR("mismatched aad");
1353   if ((ge->f&AEADF_PCHSZ) &&
1354       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1355     VALERR("header doesn't match precommitted length");
1356   if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1357     VALERR("message doesn't match precommitted length");
1358   if (tszobj == Py_None) {
1359     if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1360     else tsz = keysz(0, ge->e->ops->c->tagsz);
1361   } else {
1362     if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1363       VALERR("tag length doesn't match precommitted value");
1364     if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1365   }
1366   csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1367   tag = bytestring_pywrap(0, tsz);
1368   err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1369                    BIN_PTR(tag), tsz);
1370   assert(!err); (void)err;
1371   buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1372 end:
1373   xfree(c);
1374   return (rc);
1375 }
1376
1377 static const PyMethodDef gaeadenc_pymethods[] = {
1378 #define METHNAME(name) gaeemeth_##name
1379   NAMETH(aad,           "ENC.aad() -> AAD")
1380   KWMETH(reinit,        "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1381   METH  (encrypt,       "ENC.encrypt(MSG) -> CT")
1382   KWMETH(done,          "ENC.done([tsz], [aad]) -> CT, TAG")
1383 #undef METHNAME
1384   { 0 }
1385 };
1386
1387 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1388                                  size_t hsz, size_t csz, size_t tsz)
1389 {
1390   gaeaddec_pyobj *gd;
1391   assert(cobj); Py_INCREF(cobj);
1392   gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1393   gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1394   gd->aad = 0; gd->clen = 0;
1395   return ((PyObject *)gd);
1396 }
1397
1398 static void gaeaddec_pydealloc(PyObject *me)
1399 {
1400   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1401
1402   gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1403   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1404 }
1405
1406 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1407 {
1408   if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1409   else RETURN_NONE;
1410 }
1411
1412 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1413 {
1414   if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1415   else RETURN_NONE;
1416 }
1417
1418 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1419 {
1420   if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1421   else RETURN_NONE;
1422 }
1423
1424 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1425   { return getulong(GAEADDEC_CLEN(me)); }
1426
1427 static const PyGetSetDef gaeaddec_pygetset[] = {
1428 #define GETSETNAME(op, name) gaed##op##_##name
1429   GET   (hsz,           "DEC.hsz -> precommitted header length or `None'")
1430   GET   (csz,          "DEC.csz -> precommitted ciphertext length or `None'")
1431   GET   (tsz,           "DEC.tsz -> precommitted tag length or `None'")
1432   GET   (clen,          "DEC.clen -> ciphertext length so far")
1433 #undef GETSETNAME
1434   { 0 }
1435 };
1436
1437 static PyObject *gaedmeth_aad(PyObject *me)
1438 {
1439   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1440
1441   if (!(gd->f&AEADF_AADNDEP))
1442     return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(Py_TYPE(gd))->aad,
1443                             GAEAD_AAD(gd->d), 0, 0));
1444   else {
1445     if (!gd->aad)
1446       gd->aad = (gaeadaad_pyobj *)
1447         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(gd))->aad,
1448                         GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1449                         gd->hsz);
1450     Py_INCREF(gd->aad);
1451     return ((PyObject *)gd->aad);
1452   }
1453 }
1454
1455 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1456 {
1457   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1458   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1459   struct bin n;
1460   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1461   size_t hsz = 0, csz = 0, tsz = 0;
1462   unsigned f;
1463
1464   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1465                                    convbin, &n, &hszobj, &cszobj, &tszobj))
1466     goto end;
1467   if (check_aead_encdec(gd->d->ops->c, &f, n.sz,
1468                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1469     goto end;
1470   if (GAEAD_REINIT(gd->d, n.p, n.sz, hsz, csz, tsz))
1471     VALERR("bad aead parameter combination");
1472   gaea_sever(&gd->aad);
1473   gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1474 end:
1475   return (0);
1476 }
1477
1478 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1479 {
1480   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1481   struct bin c;
1482   char *m = 0; size_t msz; buf b;
1483   int err;
1484   PyObject *rc = 0;
1485
1486   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
1487   if (gd->f&AEADF_AADFIRST) {
1488     if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1489       VALERR("header doesn't match precommitted length");
1490     gaea_invalidate(gd->aad);
1491   }
1492   if ((gd->f&AEADF_PCMSZ) && c.sz > gd->csz - gd->clen)
1493     VALERR("too large for precommitted message length");
1494   msz = c.sz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1495   err = GAEAD_DECRYPT(gd->d, c.p, c.sz, &b); assert(!err); (void)err;
1496   buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += c.sz;
1497 end:
1498   xfree(m);
1499   return (rc);
1500 }
1501
1502 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1503 {
1504   static const char *const kwlist[] = { "tag", "aad", 0 };
1505   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1506   PyObject *aad = Py_None;
1507   struct bin t;
1508   char *m = 0; size_t msz; buf b;
1509   int err;
1510   PyObject *rc = 0;
1511
1512   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:done", KWLIST,
1513                                    convbin, &t, &aad))
1514     goto end;
1515   if (aad != Py_None &&
1516       !PyObject_TypeCheck(aad,
1517                           (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1518     TYERR("wanted aad");
1519   if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1520     VALERR("mismatched aad");
1521   if ((gd->f&AEADF_PCHSZ) &&
1522       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1523     VALERR("header doesn't match precommitted length");
1524   if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1525     VALERR("message doesn't match precommitted length");
1526   if ((gd->f&AEADF_PCTSZ) && t.sz != gd->tsz)
1527     VALERR("tag length doesn't match precommitted value");
1528   if (keysz(t.sz, gd->d->ops->c->tagsz) != t.sz) VALERR("bad tag length");
1529   msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1530   err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad),
1531                    &b, t.p, t.sz);
1532   assert(err >= 0);
1533   if (!err) VALERR("decryption failed");
1534   buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1535 end:
1536   xfree(m);
1537   return (rc);
1538 }
1539
1540 static const PyMethodDef gaeaddec_pymethods[] = {
1541 #define METHNAME(name) gaedmeth_##name
1542   NAMETH(aad,           "DEC.aad() -> AAD")
1543   KWMETH(reinit,        "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1544   METH  (decrypt,       "DEC.decrypt(CT) -> MSG")
1545   KWMETH(done,          "DEC.done(TAG, [aad]) -> MSG | None")
1546 #undef METHNAME
1547   { 0 }
1548 };
1549
1550 static const PyTypeObject gcaead_pytype_skel = {
1551   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1552   "GCAEAD",                             /* @tp_name@ */
1553   sizeof(gcaead_pyobj),                 /* @tp_basicsize@ */
1554   0,                                    /* @tp_itemsize@ */
1555
1556   0,                                    /* @tp_dealloc@ */
1557   0,                                    /* @tp_print@ */
1558   0,                                    /* @tp_getattr@ */
1559   0,                                    /* @tp_setattr@ */
1560   0,                                    /* @tp_compare@ */
1561   0,                                    /* @tp_repr@ */
1562   0,                                    /* @tp_as_number@ */
1563   0,                                    /* @tp_as_sequence@ */
1564   0,                                    /* @tp_as_mapping@ */
1565   0,                                    /* @tp_hash@ */
1566   0,                                    /* @tp_call@ */
1567   0,                                    /* @tp_str@ */
1568   0,                                    /* @tp_getattro@ */
1569   0,                                    /* @tp_setattro@ */
1570   0,                                    /* @tp_as_buffer@ */
1571   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1572     Py_TPFLAGS_BASETYPE,
1573
1574   /* @tp_doc@ */
1575   "Authenticated encryption (key) metaclass.",
1576
1577   0,                                    /* @tp_traverse@ */
1578   0,                                    /* @tp_clear@ */
1579   0,                                    /* @tp_richcompare@ */
1580   0,                                    /* @tp_weaklistoffset@ */
1581   0,                                    /* @tp_iter@ */
1582   0,                                    /* @tp_iternext@ */
1583   0,                                    /* @tp_methods@ */
1584   0,                                    /* @tp_members@ */
1585   PYGETSET(gcaead),                     /* @tp_getset@ */
1586   0,                                    /* @tp_base@ */
1587   0,                                    /* @tp_dict@ */
1588   0,                                    /* @tp_descr_get@ */
1589   0,                                    /* @tp_descr_set@ */
1590   0,                                    /* @tp_dictoffset@ */
1591   0,                                    /* @tp_init@ */
1592   PyType_GenericAlloc,                  /* @tp_alloc@ */
1593   abstract_pynew,                       /* @tp_new@ */
1594   0,                                    /* @tp_free@ */
1595   0                                     /* @tp_is_gc@ */
1596 };
1597
1598 static const PyTypeObject gaeadkey_pytype_skel = {
1599   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1600   "GAEKey",                             /* @tp_name@ */
1601   sizeof(gaeadkey_pyobj),               /* @tp_basicsize@ */
1602   0,                                    /* @tp_itemsize@ */
1603
1604   gaeadkey_pydealloc,                   /* @tp_dealloc@ */
1605   0,                                    /* @tp_print@ */
1606   0,                                    /* @tp_getattr@ */
1607   0,                                    /* @tp_setattr@ */
1608   0,                                    /* @tp_compare@ */
1609   0,                                    /* @tp_repr@ */
1610   0,                                    /* @tp_as_number@ */
1611   0,                                    /* @tp_as_sequence@ */
1612   0,                                    /* @tp_as_mapping@ */
1613   0,                                    /* @tp_hash@ */
1614   0,                                    /* @tp_call@ */
1615   0,                                    /* @tp_str@ */
1616   0,                                    /* @tp_getattro@ */
1617   0,                                    /* @tp_setattro@ */
1618   0,                                    /* @tp_as_buffer@ */
1619   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1620     Py_TPFLAGS_BASETYPE,
1621
1622   /* @tp_doc@ */
1623   "Authenticated encryption key.",
1624
1625   0,                                    /* @tp_traverse@ */
1626   0,                                    /* @tp_clear@ */
1627   0,                                    /* @tp_richcompare@ */
1628   0,                                    /* @tp_weaklistoffset@ */
1629   0,                                    /* @tp_iter@ */
1630   0,                                    /* @tp_iternext@ */
1631   PYMETHODS(gaeadkey),                  /* @tp_methods@ */
1632   0,                                    /* @tp_members@ */
1633   0,                                    /* @tp_getset@ */
1634   0,                                    /* @tp_base@ */
1635   0,                                    /* @tp_dict@ */
1636   0,                                    /* @tp_descr_get@ */
1637   0,                                    /* @tp_descr_set@ */
1638   0,                                    /* @tp_dictoffset@ */
1639   0,                                    /* @tp_init@ */
1640   PyType_GenericAlloc,                  /* @tp_alloc@ */
1641   abstract_pynew,                       /* @tp_new@ */
1642   0,                                    /* @tp_free@ */
1643   0                                     /* @tp_is_gc@ */
1644 };
1645
1646 static const PyTypeObject gcaeadaad_pytype_skel = {
1647   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1648   "GAEAADClass",                        /* @tp_name@ */
1649   sizeof(gcaeadaad_pyobj),              /* @tp_basicsize@ */
1650   0,                                    /* @tp_itemsize@ */
1651
1652   0,                                    /* @tp_dealloc@ */
1653   0,                                    /* @tp_print@ */
1654   0,                                    /* @tp_getattr@ */
1655   0,                                    /* @tp_setattr@ */
1656   0,                                    /* @tp_compare@ */
1657   0,                                    /* @tp_repr@ */
1658   0,                                    /* @tp_as_number@ */
1659   0,                                    /* @tp_as_sequence@ */
1660   0,                                    /* @tp_as_mapping@ */
1661   0,                                    /* @tp_hash@ */
1662   0,                                    /* @tp_call@ */
1663   0,                                    /* @tp_str@ */
1664   0,                                    /* @tp_getattro@ */
1665   0,                                    /* @tp_setattro@ */
1666   0,                                    /* @tp_as_buffer@ */
1667   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1668     Py_TPFLAGS_BASETYPE,
1669
1670   /* @tp_doc@ */
1671   "Authenticated encryption additional-data hash metaclass.",
1672
1673   0,                                    /* @tp_traverse@ */
1674   0,                                    /* @tp_clear@ */
1675   0,                                    /* @tp_richcompare@ */
1676   0,                                    /* @tp_weaklistoffset@ */
1677   0,                                    /* @tp_iter@ */
1678   0,                                    /* @tp_iternext@ */
1679   0,                                    /* @tp_methods@ */
1680   0,                                    /* @tp_members@ */
1681   0,                                    /* @tp_getset@ */
1682   0,                                    /* @tp_base@ */
1683   0,                                    /* @tp_dict@ */
1684   0,                                    /* @tp_descr_get@ */
1685   0,                                    /* @tp_descr_set@ */
1686   0,                                    /* @tp_dictoffset@ */
1687   0,                                    /* @tp_init@ */
1688   PyType_GenericAlloc,                  /* @tp_alloc@ */
1689   abstract_pynew,                       /* @tp_new@ */
1690   0,                                    /* @tp_free@ */
1691   0                                     /* @tp_is_gc@ */
1692 };
1693
1694 static const PyTypeObject gaeadaad_pytype_skel = {
1695   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1696   "GAEAAD",                             /* @tp_name@ */
1697   sizeof(gaeadaad_pyobj),               /* @tp_basicsize@ */
1698   0,                                    /* @tp_itemsize@ */
1699
1700   gaeadaad_pydealloc,                   /* @tp_dealloc@ */
1701   0,                                    /* @tp_print@ */
1702   0,                                    /* @tp_getattr@ */
1703   0,                                    /* @tp_setattr@ */
1704   0,                                    /* @tp_compare@ */
1705   0,                                    /* @tp_repr@ */
1706   0,                                    /* @tp_as_number@ */
1707   0,                                    /* @tp_as_sequence@ */
1708   0,                                    /* @tp_as_mapping@ */
1709   0,                                    /* @tp_hash@ */
1710   0,                                    /* @tp_call@ */
1711   0,                                    /* @tp_str@ */
1712   0,                                    /* @tp_getattro@ */
1713   0,                                    /* @tp_setattro@ */
1714   0,                                    /* @tp_as_buffer@ */
1715   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1716     Py_TPFLAGS_BASETYPE,
1717
1718   /* @tp_doc@ */
1719   "Authenticated encryption AAD hash.",
1720
1721   0,                                    /* @tp_traverse@ */
1722   0,                                    /* @tp_clear@ */
1723   0,                                    /* @tp_richcompare@ */
1724   0,                                    /* @tp_weaklistoffset@ */
1725   0,                                    /* @tp_iter@ */
1726   0,                                    /* @tp_iternext@ */
1727   PYMETHODS(gaeadaad),                  /* @tp_methods@ */
1728   0,                                    /* @tp_members@ */
1729   PYGETSET(gaeadaad),                   /* @tp_getset@ */
1730   0,                                    /* @tp_base@ */
1731   0,                                    /* @tp_dict@ */
1732   0,                                    /* @tp_descr_get@ */
1733   0,                                    /* @tp_descr_set@ */
1734   0,                                    /* @tp_dictoffset@ */
1735   0,                                    /* @tp_init@ */
1736   PyType_GenericAlloc,                  /* @tp_alloc@ */
1737   abstract_pynew,                       /* @tp_new@ */
1738   0,                                    /* @tp_free@ */
1739   0                                     /* @tp_is_gc@ */
1740 };
1741
1742 static const PyTypeObject gcaeadenc_pytype_skel = {
1743   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1744   "GAEEncClass",                        /* @tp_name@ */
1745   sizeof(gcaeadenc_pyobj),              /* @tp_basicsize@ */
1746   0,                                    /* @tp_itemsize@ */
1747
1748   0,                                    /* @tp_dealloc@ */
1749   0,                                    /* @tp_print@ */
1750   0,                                    /* @tp_getattr@ */
1751   0,                                    /* @tp_setattr@ */
1752   0,                                    /* @tp_compare@ */
1753   0,                                    /* @tp_repr@ */
1754   0,                                    /* @tp_as_number@ */
1755   0,                                    /* @tp_as_sequence@ */
1756   0,                                    /* @tp_as_mapping@ */
1757   0,                                    /* @tp_hash@ */
1758   0,                                    /* @tp_call@ */
1759   0,                                    /* @tp_str@ */
1760   0,                                    /* @tp_getattro@ */
1761   0,                                    /* @tp_setattro@ */
1762   0,                                    /* @tp_as_buffer@ */
1763   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1764     Py_TPFLAGS_BASETYPE,
1765
1766   /* @tp_doc@ */
1767   "Authenticated encryption operation metaclass.",
1768
1769   0,                                    /* @tp_traverse@ */
1770   0,                                    /* @tp_clear@ */
1771   0,                                    /* @tp_richcompare@ */
1772   0,                                    /* @tp_weaklistoffset@ */
1773   0,                                    /* @tp_iter@ */
1774   0,                                    /* @tp_iternext@ */
1775   0,                                    /* @tp_methods@ */
1776   0,                                    /* @tp_members@ */
1777   0,                                    /* @tp_getset@ */
1778   0,                                    /* @tp_base@ */
1779   0,                                    /* @tp_dict@ */
1780   0,                                    /* @tp_descr_get@ */
1781   0,                                    /* @tp_descr_set@ */
1782   0,                                    /* @tp_dictoffset@ */
1783   0,                                    /* @tp_init@ */
1784   PyType_GenericAlloc,                  /* @tp_alloc@ */
1785   abstract_pynew,                       /* @tp_new@ */
1786   0,                                    /* @tp_free@ */
1787   0                                     /* @tp_is_gc@ */
1788 };
1789
1790 static const PyTypeObject gaeadenc_pytype_skel = {
1791   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1792   "GAEEnc",                             /* @tp_name@ */
1793   sizeof(gaeadenc_pyobj),               /* @tp_basicsize@ */
1794   0,                                    /* @tp_itemsize@ */
1795
1796   gaeadenc_pydealloc,                   /* @tp_dealloc@ */
1797   0,                                    /* @tp_print@ */
1798   0,                                    /* @tp_getattr@ */
1799   0,                                    /* @tp_setattr@ */
1800   0,                                    /* @tp_compare@ */
1801   0,                                    /* @tp_repr@ */
1802   0,                                    /* @tp_as_number@ */
1803   0,                                    /* @tp_as_sequence@ */
1804   0,                                    /* @tp_as_mapping@ */
1805   0,                                    /* @tp_hash@ */
1806   0,                                    /* @tp_call@ */
1807   0,                                    /* @tp_str@ */
1808   0,                                    /* @tp_getattro@ */
1809   0,                                    /* @tp_setattro@ */
1810   0,                                    /* @tp_as_buffer@ */
1811   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1812     Py_TPFLAGS_BASETYPE,
1813
1814   /* @tp_doc@ */
1815   "Authenticated encryption operation.",
1816
1817   0,                                    /* @tp_traverse@ */
1818   0,                                    /* @tp_clear@ */
1819   0,                                    /* @tp_richcompare@ */
1820   0,                                    /* @tp_weaklistoffset@ */
1821   0,                                    /* @tp_iter@ */
1822   0,                                    /* @tp_iternext@ */
1823   PYMETHODS(gaeadenc),                  /* @tp_methods@ */
1824   0,                                    /* @tp_members@ */
1825   PYGETSET(gaeadenc),                   /* @tp_getset@ */
1826   0,                                    /* @tp_base@ */
1827   0,                                    /* @tp_dict@ */
1828   0,                                    /* @tp_descr_get@ */
1829   0,                                    /* @tp_descr_set@ */
1830   0,                                    /* @tp_dictoffset@ */
1831   0,                                    /* @tp_init@ */
1832   PyType_GenericAlloc,                  /* @tp_alloc@ */
1833   abstract_pynew,                       /* @tp_new@ */
1834   0,                                    /* @tp_free@ */
1835   0                                     /* @tp_is_gc@ */
1836 };
1837
1838 static const PyTypeObject gcaeaddec_pytype_skel = {
1839   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1840   "GAEDecClass",                        /* @tp_name@ */
1841   sizeof(gcaeaddec_pyobj),              /* @tp_basicsize@ */
1842   0,                                    /* @tp_itemsize@ */
1843
1844   0,                                    /* @tp_dealloc@ */
1845   0,                                    /* @tp_print@ */
1846   0,                                    /* @tp_getattr@ */
1847   0,                                    /* @tp_setattr@ */
1848   0,                                    /* @tp_compare@ */
1849   0,                                    /* @tp_repr@ */
1850   0,                                    /* @tp_as_number@ */
1851   0,                                    /* @tp_as_sequence@ */
1852   0,                                    /* @tp_as_mapping@ */
1853   0,                                    /* @tp_hash@ */
1854   0,                                    /* @tp_call@ */
1855   0,                                    /* @tp_str@ */
1856   0,                                    /* @tp_getattro@ */
1857   0,                                    /* @tp_setattro@ */
1858   0,                                    /* @tp_as_buffer@ */
1859   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1860     Py_TPFLAGS_BASETYPE,
1861
1862   /* @tp_doc@ */
1863   "Authenticated decryption operation metaclass.",
1864
1865   0,                                    /* @tp_traverse@ */
1866   0,                                    /* @tp_clear@ */
1867   0,                                    /* @tp_richcompare@ */
1868   0,                                    /* @tp_weaklistoffset@ */
1869   0,                                    /* @tp_iter@ */
1870   0,                                    /* @tp_iternext@ */
1871   0,                                    /* @tp_methods@ */
1872   0,                                    /* @tp_members@ */
1873   0,                                    /* @tp_getset@ */
1874   0,                                    /* @tp_base@ */
1875   0,                                    /* @tp_dict@ */
1876   0,                                    /* @tp_descr_get@ */
1877   0,                                    /* @tp_descr_set@ */
1878   0,                                    /* @tp_dictoffset@ */
1879   0,                                    /* @tp_init@ */
1880   PyType_GenericAlloc,                  /* @tp_alloc@ */
1881   abstract_pynew,                       /* @tp_new@ */
1882   0,                                    /* @tp_free@ */
1883   0                                     /* @tp_is_gc@ */
1884 };
1885
1886 static const PyTypeObject gaeaddec_pytype_skel = {
1887   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1888   "GAEDec",                             /* @tp_name@ */
1889   sizeof(gaeaddec_pyobj),               /* @tp_basicsize@ */
1890   0,                                    /* @tp_itemsize@ */
1891
1892   gaeaddec_pydealloc,                   /* @tp_dealloc@ */
1893   0,                                    /* @tp_print@ */
1894   0,                                    /* @tp_getattr@ */
1895   0,                                    /* @tp_setattr@ */
1896   0,                                    /* @tp_compare@ */
1897   0,                                    /* @tp_repr@ */
1898   0,                                    /* @tp_as_number@ */
1899   0,                                    /* @tp_as_sequence@ */
1900   0,                                    /* @tp_as_mapping@ */
1901   0,                                    /* @tp_hash@ */
1902   0,                                    /* @tp_call@ */
1903   0,                                    /* @tp_str@ */
1904   0,                                    /* @tp_getattro@ */
1905   0,                                    /* @tp_setattro@ */
1906   0,                                    /* @tp_as_buffer@ */
1907   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1908     Py_TPFLAGS_BASETYPE,
1909
1910   /* @tp_doc@ */
1911   "Authenticated decryption operation.",
1912
1913   0,                                    /* @tp_traverse@ */
1914   0,                                    /* @tp_clear@ */
1915   0,                                    /* @tp_richcompare@ */
1916   0,                                    /* @tp_weaklistoffset@ */
1917   0,                                    /* @tp_iter@ */
1918   0,                                    /* @tp_iternext@ */
1919   PYMETHODS(gaeaddec),                  /* @tp_methods@ */
1920   0,                                    /* @tp_members@ */
1921   PYGETSET(gaeaddec),                   /* @tp_getset@ */
1922   0,                                    /* @tp_base@ */
1923   0,                                    /* @tp_dict@ */
1924   0,                                    /* @tp_descr_get@ */
1925   0,                                    /* @tp_descr_set@ */
1926   0,                                    /* @tp_dictoffset@ */
1927   0,                                    /* @tp_init@ */
1928   PyType_GenericAlloc,                  /* @tp_alloc@ */
1929   abstract_pynew,                       /* @tp_new@ */
1930   0,                                    /* @tp_free@ */
1931   0                                     /* @tp_is_gc@ */
1932 };
1933
1934 /*----- Hash functions ----------------------------------------------------*/
1935
1936 PyTypeObject *gchash_pytype;
1937 static PyTypeObject *ghash_pytype;
1938 PyObject *sha_pyobj, *has160_pyobj;
1939
1940 typedef struct ghash_pyobj {
1941   PyObject_HEAD
1942   ghash *h;
1943 } ghash_pyobj;
1944
1945 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1946 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1947
1948 CONVFUNC(gchash, gchash *, GCHASH_CH)
1949 CONVFUNC(ghash, ghash *, GHASH_H)
1950
1951 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1952 {
1953   static const char *const kwlist[] = { 0 };
1954   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1955     goto end;
1956   return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1957 end:
1958   return (0);
1959 }
1960
1961 static PyObject *gchash_pywrap(gchash *ch)
1962 {
1963   gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1964   g->ch = ch;
1965   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1966   g->ty.ht_type.tp_base = ghash_pytype;
1967   Py_INCREF(ghash_pytype);
1968   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1969                             Py_TPFLAGS_BASETYPE |
1970                             Py_TPFLAGS_HEAPTYPE);
1971   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1972   g->ty.ht_type.tp_free = 0;
1973   g->ty.ht_type.tp_new = ghash_pynew;
1974   typeready(&g->ty.ht_type);
1975   return ((PyObject *)g);
1976 }
1977
1978 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1979 {
1980   ghash_pyobj *g;
1981   if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1982   else Py_INCREF(cobj);
1983   g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1984   g->h = h;
1985   return ((PyObject *)g);
1986 }
1987
1988 static void ghash_pydealloc(PyObject *me)
1989 {
1990   GH_DESTROY(GHASH_H(me));
1991   Py_DECREF(Py_TYPE(me));
1992   FREEOBJ(me);
1993 }
1994
1995 static PyObject *gchget_name(PyObject *me, void *hunoz)
1996   { return (TEXT_FROMSTR(GCHASH_CH(me)->name)); }
1997
1998 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
1999   { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2000
2001 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2002   { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2003
2004 static PyObject *ghmeth_copy(PyObject *me)
2005   { return (ghash_pywrap((PyObject *)Py_TYPE(me), GH_COPY(GHASH_H(me)))); }
2006
2007 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2008 {
2009   struct bin m;
2010   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2011   GH_HASH(GHASH_H(me), m.p, m.sz);
2012   RETURN_ME;
2013 }
2014
2015 #define GHMETH_HASHU_(n, W, w)                                          \
2016   static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg)         \
2017   {                                                                     \
2018     uint##n x;                                                          \
2019     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2020     GH_HASHU##W(GHASH_H(me), x);                                        \
2021     RETURN_ME;                                                          \
2022   }
2023 DOUINTCONV(GHMETH_HASHU_)
2024
2025 #define GHMETH_HASHBUF_(n, W, w)                                        \
2026   static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg)       \
2027   {                                                                     \
2028     struct bin in;                                                      \
2029     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2030     if (in.sz > MASK##n) TYERR("string too long");                      \
2031     GH_HASHBUF##W(GHASH_H(me), in.p, in.sz);                            \
2032     RETURN_ME;                                                          \
2033   end:                                                                  \
2034     return (0);                                                         \
2035   }
2036 DOUINTCONV(GHMETH_HASHBUF_)
2037
2038 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2039 {
2040   char *p;
2041   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2042   GH_HASHSTRZ(GHASH_H(me), p);
2043   RETURN_ME;
2044 }
2045
2046 static PyObject *ghmeth_done(PyObject *me)
2047 {
2048   ghash *g;
2049   PyObject *rc;
2050   g = GH_COPY(GHASH_H(me));
2051   rc = bytestring_pywrap(0, g->ops->c->hashsz);
2052   GH_DONE(g, BIN_PTR(rc));
2053   GH_DESTROY(g);
2054   return (rc);
2055 }
2056
2057 static const PyGetSetDef gchash_pygetset[] = {
2058 #define GETSETNAME(op, name) gch##op##_##name
2059   GET   (bufsz,         "CH.bufsz -> hash buffer size, or zero")
2060   GET   (hashsz,        "CH.hashsz -> hash output size")
2061   GET   (name,          "CH.name -> name of this kind of hash")
2062 #undef GETSETNAME
2063   { 0 }
2064 };
2065
2066 static const PyMethodDef ghash_pymethods[] = {
2067 #define METHNAME(name) ghmeth_##name
2068   NAMETH(copy,          "H.copy() -> HH")
2069   METH  (hash,          "H.hash(M)")
2070 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2071   DOUINTCONV(METHU_)
2072 #undef METHU_
2073 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2074   DOUINTCONV(METHBUF_)
2075 #undef METHBUF_
2076   METH  (hashstrz,      "H.hashstrz(STRING)")
2077   NAMETH(done,          "H.done() -> HASH")
2078 #undef METHNAME
2079   { 0 }
2080 };
2081
2082 static const PyTypeObject gchash_pytype_skel = {
2083   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2084   "GCHash",                             /* @tp_name@ */
2085   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2086   0,                                    /* @tp_itemsize@ */
2087
2088   0,                                    /* @tp_dealloc@ */
2089   0,                                    /* @tp_print@ */
2090   0,                                    /* @tp_getattr@ */
2091   0,                                    /* @tp_setattr@ */
2092   0,                                    /* @tp_compare@ */
2093   0,                                    /* @tp_repr@ */
2094   0,                                    /* @tp_as_number@ */
2095   0,                                    /* @tp_as_sequence@ */
2096   0,                                    /* @tp_as_mapping@ */
2097   0,                                    /* @tp_hash@ */
2098   0,                                    /* @tp_call@ */
2099   0,                                    /* @tp_str@ */
2100   0,                                    /* @tp_getattro@ */
2101   0,                                    /* @tp_setattro@ */
2102   0,                                    /* @tp_as_buffer@ */
2103   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2104     Py_TPFLAGS_BASETYPE,
2105
2106   /* @tp_doc@ */
2107   "Hash function metaclass.",
2108
2109   0,                                    /* @tp_traverse@ */
2110   0,                                    /* @tp_clear@ */
2111   0,                                    /* @tp_richcompare@ */
2112   0,                                    /* @tp_weaklistoffset@ */
2113   0,                                    /* @tp_iter@ */
2114   0,                                    /* @tp_iternext@ */
2115   0,                                    /* @tp_methods@ */
2116   0,                                    /* @tp_members@ */
2117   PYGETSET(gchash),                     /* @tp_getset@ */
2118   0,                                    /* @tp_base@ */
2119   0,                                    /* @tp_dict@ */
2120   0,                                    /* @tp_descr_get@ */
2121   0,                                    /* @tp_descr_set@ */
2122   0,                                    /* @tp_dictoffset@ */
2123   0,                                    /* @tp_init@ */
2124   PyType_GenericAlloc,                  /* @tp_alloc@ */
2125   abstract_pynew,                       /* @tp_new@ */
2126   0,                                    /* @tp_free@ */
2127   0                                     /* @tp_is_gc@ */
2128 };
2129
2130 static const PyTypeObject ghash_pytype_skel = {
2131   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2132   "GHash",                              /* @tp_name@ */
2133   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2134   0,                                    /* @tp_itemsize@ */
2135
2136   ghash_pydealloc,                      /* @tp_dealloc@ */
2137   0,                                    /* @tp_print@ */
2138   0,                                    /* @tp_getattr@ */
2139   0,                                    /* @tp_setattr@ */
2140   0,                                    /* @tp_compare@ */
2141   0,                                    /* @tp_repr@ */
2142   0,                                    /* @tp_as_number@ */
2143   0,                                    /* @tp_as_sequence@ */
2144   0,                                    /* @tp_as_mapping@ */
2145   0,                                    /* @tp_hash@ */
2146   0,                                    /* @tp_call@ */
2147   0,                                    /* @tp_str@ */
2148   0,                                    /* @tp_getattro@ */
2149   0,                                    /* @tp_setattro@ */
2150   0,                                    /* @tp_as_buffer@ */
2151   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2152     Py_TPFLAGS_BASETYPE,
2153
2154   /* @tp_doc@ */
2155   "Hash function, abstract base class.",
2156
2157   0,                                    /* @tp_traverse@ */
2158   0,                                    /* @tp_clear@ */
2159   0,                                    /* @tp_richcompare@ */
2160   0,                                    /* @tp_weaklistoffset@ */
2161   0,                                    /* @tp_iter@ */
2162   0,                                    /* @tp_iternext@ */
2163   PYMETHODS(ghash),                     /* @tp_methods@ */
2164   0,                                    /* @tp_members@ */
2165   0,                                    /* @tp_getset@ */
2166   0,                                    /* @tp_base@ */
2167   0,                                    /* @tp_dict@ */
2168   0,                                    /* @tp_descr_get@ */
2169   0,                                    /* @tp_descr_set@ */
2170   0,                                    /* @tp_dictoffset@ */
2171   0,                                    /* @tp_init@ */
2172   PyType_GenericAlloc,                  /* @tp_alloc@ */
2173   abstract_pynew,                       /* @tp_new@ */
2174   0,                                    /* @tp_free@ */
2175   0                                     /* @tp_is_gc@ */
2176 };
2177
2178 /*----- Message authentication --------------------------------------------*/
2179
2180 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2181
2182 typedef struct gcmac_pyobj {
2183   PyHeapTypeObject ty;
2184   gcmac *cm;
2185 } gcmac_pyobj;
2186
2187 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2188 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2189 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2190 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2191 static PyObject *gmac_pywrap(PyObject *, gmac *);
2192
2193 typedef struct gmac_pyobj {
2194   PyHeapTypeObject ty;
2195   gmac *m;
2196 } gmac_pyobj;
2197
2198 extern PyTypeObject *gmac_pytype;
2199 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2200 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2201 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2202 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2203 extern int convgmac(PyObject *, void *);
2204
2205 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2206 {
2207   static const char *const kwlist[] = { "k", 0 };
2208   struct bin k;
2209
2210   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2211     goto end;
2212   if (keysz(k.sz, GCMAC_CM(ty)->keysz) != k.sz) VALERR("bad key length");
2213   return (gmac_pywrap((PyObject *)ty,
2214                       GM_KEY(GCMAC_CM(ty), k.p, k.sz)));
2215 end:
2216   return (0);
2217 }
2218
2219 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2220 {
2221   static const char *const kwlist[] = { 0 };
2222   ghash_pyobj *g;
2223
2224   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2225   g = PyObject_NEW(ghash_pyobj, ty);
2226   g->h = GM_INIT(GMAC_M(ty));
2227   Py_INCREF(ty);
2228   return ((PyObject *)g);
2229 }
2230
2231 static PyObject *gcmac_pywrap(gcmac *cm)
2232 {
2233   gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2234   g->cm = cm;
2235   g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2236   g->ty.ht_type.tp_base = gmac_pytype;
2237   Py_INCREF(gmac_pytype);
2238   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2239                             Py_TPFLAGS_BASETYPE |
2240                             Py_TPFLAGS_HEAPTYPE);
2241   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2242   g->ty.ht_type.tp_free = 0;
2243   g->ty.ht_type.tp_new = gmac_pynew;
2244   typeready(&g->ty.ht_type);
2245   return ((PyObject *)g);
2246 }
2247
2248 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2249 {
2250   gmac_pyobj *g;
2251   if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2252   else Py_INCREF(cobj);
2253   g = newtype((PyTypeObject *)cobj, 0, 0);
2254   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2255   g->ty.ht_name = TEXT_FORMAT("%s(keyed)", m->ops->c->name);
2256   g->ty.ht_type.tp_name = TEXT_PTR(g->ty.ht_name);
2257   g->ty.ht_type.tp_base = gmhash_pytype;
2258   Py_INCREF(gmac_pytype);
2259   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2260                             Py_TPFLAGS_BASETYPE |
2261                             Py_TPFLAGS_HEAPTYPE);
2262   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2263   g->ty.ht_type.tp_free = 0;
2264   g->ty.ht_type.tp_new = gmhash_pynew;
2265   typeready(&g->ty.ht_type);
2266   g->m = m;
2267   return ((PyObject *)g);
2268 }
2269
2270 static void gmac_pydealloc(PyObject *me)
2271 {
2272   GM_DESTROY(GMAC_M(me));
2273   Py_DECREF(Py_TYPE(me));
2274   PyType_Type.tp_dealloc(me);
2275 }
2276
2277 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2278   { return (TEXT_FROMSTR(GCMAC_CM(me)->name)); }
2279
2280 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2281   { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2282
2283 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2284   { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2285
2286 static const PyGetSetDef gcmac_pygetset[] = {
2287 #define GETSETNAME(op, name) gcm##op##_##name
2288   GET   (keysz,         "CM.keysz -> acceptable key sizes")
2289   GET   (tagsz,         "CM.tagsz -> MAC output size")
2290   GET   (name,          "CM.name -> name of this kind of MAC")
2291 #undef GETSETNAME
2292   { 0 }
2293 };
2294
2295 static const PyTypeObject gcmac_pytype_skel = {
2296   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2297   "GCMAC",                              /* @tp_name@ */
2298   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2299   0,                                    /* @tp_itemsize@ */
2300
2301   0,                                    /* @tp_dealloc@ */
2302   0,                                    /* @tp_print@ */
2303   0,                                    /* @tp_getattr@ */
2304   0,                                    /* @tp_setattr@ */
2305   0,                                    /* @tp_compare@ */
2306   0,                                    /* @tp_repr@ */
2307   0,                                    /* @tp_as_number@ */
2308   0,                                    /* @tp_as_sequence@ */
2309   0,                                    /* @tp_as_mapping@ */
2310   0,                                    /* @tp_hash@ */
2311   0,                                    /* @tp_call@ */
2312   0,                                    /* @tp_str@ */
2313   0,                                    /* @tp_getattro@ */
2314   0,                                    /* @tp_setattro@ */
2315   0,                                    /* @tp_as_buffer@ */
2316   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2317     Py_TPFLAGS_BASETYPE,
2318
2319   /* @tp_doc@ */
2320   "Message authentication code metametaclass.",
2321
2322   0,                                    /* @tp_traverse@ */
2323   0,                                    /* @tp_clear@ */
2324   0,                                    /* @tp_richcompare@ */
2325   0,                                    /* @tp_weaklistoffset@ */
2326   0,                                    /* @tp_iter@ */
2327   0,                                    /* @tp_iternext@ */
2328   0,                                    /* @tp_methods@ */
2329   0,                                    /* @tp_members@ */
2330   PYGETSET(gcmac),                      /* @tp_getset@ */
2331   0,                                    /* @tp_base@ */
2332   0,                                    /* @tp_dict@ */
2333   0,                                    /* @tp_descr_get@ */
2334   0,                                    /* @tp_descr_set@ */
2335   0,                                    /* @tp_dictoffset@ */
2336   0,                                    /* @tp_init@ */
2337   PyType_GenericAlloc,                  /* @tp_alloc@ */
2338   abstract_pynew,                       /* @tp_new@ */
2339   0,                                    /* @tp_free@ */
2340   0                                     /* @tp_is_gc@ */
2341 };
2342
2343 static const PyTypeObject gmac_pytype_skel = {
2344   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2345   "GMAC",                               /* @tp_name@ */
2346   sizeof(gmac_pyobj),                   /* @tp_basicsize@ */
2347   0,                                    /* @tp_itemsize@ */
2348
2349   gmac_pydealloc,                       /* @tp_dealloc@ */
2350   0,                                    /* @tp_print@ */
2351   0,                                    /* @tp_getattr@ */
2352   0,                                    /* @tp_setattr@ */
2353   0,                                    /* @tp_compare@ */
2354   0,                                    /* @tp_repr@ */
2355   0,                                    /* @tp_as_number@ */
2356   0,                                    /* @tp_as_sequence@ */
2357   0,                                    /* @tp_as_mapping@ */
2358   0,                                    /* @tp_hash@ */
2359   0,                                    /* @tp_call@ */
2360   0,                                    /* @tp_str@ */
2361   0,                                    /* @tp_getattro@ */
2362   0,                                    /* @tp_setattro@ */
2363   0,                                    /* @tp_as_buffer@ */
2364   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2365     Py_TPFLAGS_BASETYPE,
2366
2367   /* @tp_doc@ */
2368   "Message authentication code metaclass, abstract base class.",
2369
2370   0,                                    /* @tp_traverse@ */
2371   0,                                    /* @tp_clear@ */
2372   0,                                    /* @tp_richcompare@ */
2373   0,                                    /* @tp_weaklistoffset@ */
2374   0,                                    /* @tp_iter@ */
2375   0,                                    /* @tp_iternext@ */
2376   0,                                    /* @tp_methods@ */
2377   0,                                    /* @tp_members@ */
2378   0,                                    /* @tp_getset@ */
2379   0,                                    /* @tp_base@ */
2380   0,                                    /* @tp_dict@ */
2381   0,                                    /* @tp_descr_get@ */
2382   0,                                    /* @tp_descr_set@ */
2383   0,                                    /* @tp_dictoffset@ */
2384   0,                                    /* @tp_init@ */
2385   PyType_GenericAlloc,                  /* @tp_alloc@ */
2386   abstract_pynew,                       /* @tp_new@ */
2387   0,                                    /* @tp_free@ */
2388   0                                     /* @tp_is_gc@ */
2389 };
2390
2391 static const PyTypeObject gmhash_pytype_skel = {
2392   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2393   "GMACHash",                           /* @tp_name@ */
2394   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2395   0,                                    /* @tp_itemsize@ */
2396
2397   ghash_pydealloc,                      /* @tp_dealloc@ */
2398   0,                                    /* @tp_print@ */
2399   0,                                    /* @tp_getattr@ */
2400   0,                                    /* @tp_setattr@ */
2401   0,                                    /* @tp_compare@ */
2402   0,                                    /* @tp_repr@ */
2403   0,                                    /* @tp_as_number@ */
2404   0,                                    /* @tp_as_sequence@ */
2405   0,                                    /* @tp_as_mapping@ */
2406   0,                                    /* @tp_hash@ */
2407   0,                                    /* @tp_call@ */
2408   0,                                    /* @tp_str@ */
2409   0,                                    /* @tp_getattro@ */
2410   0,                                    /* @tp_setattro@ */
2411   0,                                    /* @tp_as_buffer@ */
2412   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2413     Py_TPFLAGS_BASETYPE,
2414
2415   /* @tp_doc@ */
2416   "Message authentication code, abstract base class.",
2417
2418   0,                                    /* @tp_traverse@ */
2419   0,                                    /* @tp_clear@ */
2420   0,                                    /* @tp_richcompare@ */
2421   0,                                    /* @tp_weaklistoffset@ */
2422   0,                                    /* @tp_iter@ */
2423   0,                                    /* @tp_iternext@ */
2424   0,                                    /* @tp_methods@ */
2425   0,                                    /* @tp_members@ */
2426   0,                                    /* @tp_getset@ */
2427   0,                                    /* @tp_base@ */
2428   0,                                    /* @tp_dict@ */
2429   0,                                    /* @tp_descr_get@ */
2430   0,                                    /* @tp_descr_set@ */
2431   0,                                    /* @tp_dictoffset@ */
2432   0,                                    /* @tp_init@ */
2433   PyType_GenericAlloc,                  /* @tp_alloc@ */
2434   abstract_pynew,                       /* @tp_new@ */
2435   0,                                    /* @tp_free@ */
2436   0                                     /* @tp_is_gc@ */
2437 };
2438
2439 /*----- Special snowflake for Poly1305 ------------------------------------*/
2440
2441 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2442
2443 typedef struct poly1305key_pyobj {
2444   PyHeapTypeObject ty;
2445   poly1305_key k;
2446 } poly1305key_pyobj;
2447
2448 typedef struct poly1305hash_pyobj {
2449   PyObject_HEAD
2450   unsigned f;
2451 #define f_mask 1u
2452   poly1305_ctx ctx;
2453 } poly1305hash_pyobj;
2454
2455 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2456 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2457 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2458
2459 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2460                                     PyObject *arg, PyObject *kw)
2461 {
2462   static const char *const kwlist[] = { "mask", 0 };
2463   poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2464   poly1305hash_pyobj *ph;
2465   struct bin m = { 0, 0 };
2466
2467   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convbin, &m))
2468     return (0);
2469   if (m.p && m.sz != POLY1305_MASKSZ) VALERR("bad mask length");
2470   ph = PyObject_NEW(poly1305hash_pyobj, ty);
2471   ph->f = 0;
2472   if (m.p) ph->f |= f_mask;
2473   poly1305_macinit(&ph->ctx, &pk->k, m.p);
2474   Py_INCREF(ty);
2475   return ((PyObject *)ph);
2476 end:
2477   return (0);
2478 }
2479
2480 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2481                                    PyObject *arg, PyObject *kw)
2482 {
2483   static const char *const kwlist[] = { "k", 0 };
2484   poly1305key_pyobj *pk;
2485   struct bin k;
2486
2487   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2488     goto end;
2489   if (keysz(k.sz, poly1305_keysz) != k.sz) VALERR("bad key length");
2490
2491   pk = newtype(ty, 0, 0);
2492   pk->ty.ht_name = TEXT_FROMSTR("poly1305(keyed)");
2493   pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2494   pk->ty.ht_type.tp_name = TEXT_PTR(pk->ty.ht_name);
2495   pk->ty.ht_type.tp_base = poly1305hash_pytype;
2496   Py_INCREF(poly1305key_pytype);
2497   pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2498                              Py_TPFLAGS_BASETYPE |
2499                              Py_TPFLAGS_HEAPTYPE);
2500   pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2501   pk->ty.ht_type.tp_free = 0;
2502   pk->ty.ht_type.tp_new = poly1305hash_pynew;
2503   typeready(&pk->ty.ht_type);
2504
2505   poly1305_keyinit(&pk->k, k.p, k.sz);
2506   return ((PyObject *)pk);
2507
2508 end:
2509   return (0);
2510 }
2511
2512 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2513   { return (TEXT_FROMSTR("poly1305")); }
2514
2515 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2516   { return (keysz_pywrap(poly1305_keysz)); }
2517
2518 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2519   { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2520
2521 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2522   { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2523
2524 static PyObject *polymeth_copy(PyObject *me)
2525 {
2526   poly1305hash_pyobj *ph;
2527   ph = PyObject_NEW(poly1305hash_pyobj, Py_TYPE(me));
2528   poly1305_copy(&ph->ctx, P1305_CTX(me));
2529   Py_INCREF(Py_TYPE(me));
2530   return ((PyObject *)ph);
2531 }
2532
2533 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2534 {
2535   struct bin m;
2536   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2537   poly1305_hash(P1305_CTX(me), m.p, m.sz);
2538   RETURN_ME;
2539 }
2540
2541 #define POLYMETH_HASHU_(n, W, w)                                        \
2542   static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg)       \
2543   {                                                                     \
2544     uint##n x;                                                          \
2545     octet b[SZ_##W];                                                    \
2546     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2547     STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b));         \
2548     RETURN_ME;                                                          \
2549   }
2550 DOUINTCONV(POLYMETH_HASHU_)
2551
2552 #define POLYMETH_HASHBUF_(n, W, w)                                      \
2553   static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg)     \
2554   {                                                                     \
2555     struct bin in;                                                      \
2556     octet b[SZ_##W];                                                    \
2557     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2558     if (in.sz > MASK##n) TYERR("string too long");                      \
2559     STORE##W(b, in.sz); poly1305_hash(P1305_CTX(me), b, sizeof(b));     \
2560     poly1305_hash(P1305_CTX(me), in.p, in.sz);                          \
2561     RETURN_ME;                                                          \
2562   end:                                                                  \
2563     return (0);                                                         \
2564   }
2565 DOUINTCONV(POLYMETH_HASHBUF_)
2566
2567 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2568 {
2569   char *p;
2570   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2571   poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2572   RETURN_ME;
2573 }
2574
2575 static PyObject *polymeth_flush(PyObject *me)
2576   { poly1305_flush(P1305_CTX(me)); RETURN_ME; }
2577
2578 static PyObject *polymeth_flushzero(PyObject *me)
2579   { poly1305_flushzero(P1305_CTX(me)); RETURN_ME; }
2580
2581 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2582 {
2583   PyObject *pre, *suff;
2584   if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2585   if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2586       !PyObject_TypeCheck(suff, poly1305hash_pytype))
2587     TYERR("wanted a poly1305hash");
2588   if (Py_TYPE(me) != Py_TYPE(pre) || Py_TYPE(me) != Py_TYPE(suff))
2589     TYERR("key mismatch");
2590   if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2591   poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2592   RETURN_ME;
2593 end:
2594   return (0);
2595 }
2596
2597 static PyObject *polymeth_done(PyObject *me)
2598 {
2599   PyObject *rc;
2600   if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2601   rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2602   poly1305_done(P1305_CTX(me), BIN_PTR(rc));
2603   return (rc);
2604 end:
2605   return (0);
2606 }
2607
2608 static const PyGetSetDef poly1305cls_pygetset[] = {
2609 #define GETSETNAME(op, name) poly1305cls##op##_##name
2610   GET   (keysz,         "PC.keysz -> acceptable key sizes")
2611   GET   (masksz,        "PC.masksz -> mask size")
2612   GET   (tagsz,         "PC.tagsz -> MAC output size")
2613   GET   (name,          "PC.name -> name of this kind of MAC")
2614 #undef GETSETNAME
2615   { 0 }
2616 };
2617
2618 static const PyMethodDef poly1305hash_pymethods[] = {
2619 #define METHNAME(name) polymeth_##name
2620   NAMETH(copy,          "P.copy() -> PP")
2621   METH  (hash,          "P.hash(M)")
2622 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2623   DOUINTCONV(METHU_)
2624 #undef METHU_
2625 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2626   DOUINTCONV(METHBUF_)
2627 #undef METHBUF_
2628   METH  (hashstrz,      "P.hashstrz(STRING)")
2629   NAMETH(flush,         "P.flush()")
2630   NAMETH(flushzero,     "P.flushzero()")
2631   METH  (concat,        "P.concat(PREFIX, SUFFIX)")
2632   NAMETH(done,          "P.done() -> TAG")
2633 #undef METHNAME
2634   { 0 }
2635 };
2636
2637 static const PyTypeObject poly1305cls_pytype_skel = {
2638   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2639   "Poly1305Class",                      /* @tp_name@ */
2640   sizeof(PyHeapTypeObject),             /* @tp_basicsize@ */
2641   0,                                    /* @tp_itemsize@ */
2642
2643   0,                                    /* @tp_dealloc@ */
2644   0,                                    /* @tp_print@ */
2645   0,                                    /* @tp_getattr@ */
2646   0,                                    /* @tp_setattr@ */
2647   0,                                    /* @tp_compare@ */
2648   0,                                    /* @tp_repr@ */
2649   0,                                    /* @tp_as_number@ */
2650   0,                                    /* @tp_as_sequence@ */
2651   0,                                    /* @tp_as_mapping@ */
2652   0,                                    /* @tp_hash@ */
2653   0,                                    /* @tp_call@ */
2654   0,                                    /* @tp_str@ */
2655   0,                                    /* @tp_getattro@ */
2656   0,                                    /* @tp_setattro@ */
2657   0,                                    /* @tp_as_buffer@ */
2658   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2659     Py_TPFLAGS_BASETYPE,
2660
2661   /* @tp_doc@ */
2662   "Poly1305 metametaclass.  Best not to ask.",
2663
2664   0,                                    /* @tp_traverse@ */
2665   0,                                    /* @tp_clear@ */
2666   0,                                    /* @tp_richcompare@ */
2667   0,                                    /* @tp_weaklistoffset@ */
2668   0,                                    /* @tp_iter@ */
2669   0,                                    /* @tp_iternext@ */
2670   0,                                    /* @tp_methods@ */
2671   0,                                    /* @tp_members@ */
2672   PYGETSET(poly1305cls),                /* @tp_getset@ */
2673   0,                                    /* @tp_base@ */
2674   0,                                    /* @tp_dict@ */
2675   0,                                    /* @tp_descr_get@ */
2676   0,                                    /* @tp_descr_set@ */
2677   0,                                    /* @tp_dictoffset@ */
2678   0,                                    /* @tp_init@ */
2679   PyType_GenericAlloc,                  /* @tp_alloc@ */
2680   abstract_pynew,                       /* @tp_new@ */
2681   0,                                    /* @tp_free@ */
2682   0                                     /* @tp_is_gc@ */
2683 };
2684
2685 static const PyTypeObject poly1305key_pytype_skel = {
2686   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2687   "poly1305",                           /* @tp_name@ */
2688   sizeof(poly1305key_pyobj),            /* @tp_basicsize@ */
2689   0,                                    /* @tp_itemsize@ */
2690
2691   0,                                    /* @tp_dealloc@ */
2692   0,                                    /* @tp_print@ */
2693   0,                                    /* @tp_getattr@ */
2694   0,                                    /* @tp_setattr@ */
2695   0,                                    /* @tp_compare@ */
2696   0,                                    /* @tp_repr@ */
2697   0,                                    /* @tp_as_number@ */
2698   0,                                    /* @tp_as_sequence@ */
2699   0,                                    /* @tp_as_mapping@ */
2700   0,                                    /* @tp_hash@ */
2701   0,                                    /* @tp_call@ */
2702   0,                                    /* @tp_str@ */
2703   0,                                    /* @tp_getattro@ */
2704   0,                                    /* @tp_setattro@ */
2705   0,                                    /* @tp_as_buffer@ */
2706   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2707     Py_TPFLAGS_BASETYPE,
2708
2709   /* @tp_doc@ */
2710   "poly1305(K): Poly1305 key.",
2711
2712   0,                                    /* @tp_traverse@ */
2713   0,                                    /* @tp_clear@ */
2714   0,                                    /* @tp_richcompare@ */
2715   0,                                    /* @tp_weaklistoffset@ */
2716   0,                                    /* @tp_iter@ */
2717   0,                                    /* @tp_iternext@ */
2718   0,                                    /* @tp_methods@ */
2719   0,                                    /* @tp_members@ */
2720   0,                                    /* @tp_getset@ */
2721   0,                                    /* @tp_base@ */
2722   0,                                    /* @tp_dict@ */
2723   0,                                    /* @tp_descr_get@ */
2724   0,                                    /* @tp_descr_set@ */
2725   0,                                    /* @tp_dictoffset@ */
2726   0,                                    /* @tp_init@ */
2727   PyType_GenericAlloc,                  /* @tp_alloc@ */
2728   poly1305key_pynew,                    /* @tp_new@ */
2729   0,                                    /* @tp_free@ */
2730   0                                     /* @tp_is_gc@ */
2731 };
2732
2733 static const PyTypeObject poly1305hash_pytype_skel = {
2734   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2735   "Poly1305Hash",                       /* @tp_name@ */
2736   sizeof(poly1305hash_pyobj),           /* @tp_basicsize@ */
2737   0,                                    /* @tp_itemsize@ */
2738
2739   0,                                    /* @tp_dealloc@ */
2740   0,                                    /* @tp_print@ */
2741   0,                                    /* @tp_getattr@ */
2742   0,                                    /* @tp_setattr@ */
2743   0,                                    /* @tp_compare@ */
2744   0,                                    /* @tp_repr@ */
2745   0,                                    /* @tp_as_number@ */
2746   0,                                    /* @tp_as_sequence@ */
2747   0,                                    /* @tp_as_mapping@ */
2748   0,                                    /* @tp_hash@ */
2749   0,                                    /* @tp_call@ */
2750   0,                                    /* @tp_str@ */
2751   0,                                    /* @tp_getattro@ */
2752   0,                                    /* @tp_setattro@ */
2753   0,                                    /* @tp_as_buffer@ */
2754   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2755     Py_TPFLAGS_BASETYPE,
2756
2757   /* @tp_doc@ */
2758   "Poly1305 MAC context base class.",
2759
2760   0,                                    /* @tp_traverse@ */
2761   0,                                    /* @tp_clear@ */
2762   0,                                    /* @tp_richcompare@ */
2763   0,                                    /* @tp_weaklistoffset@ */
2764   0,                                    /* @tp_iter@ */
2765   0,                                    /* @tp_iternext@ */
2766   PYMETHODS(poly1305hash),              /* @tp_methods@ */
2767   0,                                    /* @tp_members@ */
2768   0,                                    /* @tp_getset@ */
2769   0,                                    /* @tp_base@ */
2770   0,                                    /* @tp_dict@ */
2771   0,                                    /* @tp_descr_get@ */
2772   0,                                    /* @tp_descr_set@ */
2773   0,                                    /* @tp_dictoffset@ */
2774   0,                                    /* @tp_init@ */
2775   PyType_GenericAlloc,                  /* @tp_alloc@ */
2776   abstract_pynew,                       /* @tp_new@ */
2777   0,                                    /* @tp_free@ */
2778   0                                     /* @tp_is_gc@ */
2779 };
2780
2781 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2782
2783 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance)                        \
2784   static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg)     \
2785   {                                                                     \
2786     dance##_ctx dance;                                                  \
2787     struct bin k, n;                                                    \
2788     PyObject *rc;                                                       \
2789     if (!PyArg_ParseTuple(arg, "O&O&:" #hdance "_prf",                  \
2790                           convbin, &k, convbin, &n))                    \
2791       goto end;                                                         \
2792     if (k.sz != keysz(k.sz, dance##_keysz)) VALERR("bad key length");   \
2793     if (n.sz != HDANCE##_INSZ) VALERR("bad input length");              \
2794     rc = bytestring_pywrap(0, HSALSA20_OUTSZ);                          \
2795     dance##_init(&dance, k.p, k.sz, 0);                                 \
2796     hdance##_prf(&dance, n.p, BIN_PTR(rc));                             \
2797     return (rc);                                                        \
2798   end:                                                                  \
2799     return (0);                                                         \
2800   }
2801
2802 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2803 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2804 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2805
2806 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2807 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2808 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2809
2810 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2811
2812 static PyTypeObject *kxvik_pytype;
2813
2814 typedef struct kxvik_pyobj {
2815   PyObject_HEAD
2816   keccak1600_state s;
2817   unsigned n;
2818 } kxvik_pyobj;
2819
2820 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2821 {
2822   unsigned n = 24;
2823   kxvik_pyobj *rc = 0;
2824   static const char *const kwlist[] = { "nround", 0 };
2825   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2826                                    convuint, &n))
2827     goto end;
2828   rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2829   rc->n = n;
2830   keccak1600_init(&rc->s);
2831 end:
2832   return ((PyObject *)rc);
2833 }
2834
2835 static PyObject *kxvikmeth_copy(PyObject *me)
2836 {
2837   kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2838   rc = (kxvik_pyobj *)Py_TYPE(k)->tp_alloc(Py_TYPE(k), 0);
2839   rc->s = k->s; rc->n = k->n;
2840   return ((PyObject *)rc);
2841 }
2842
2843 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2844 {
2845   kxvik_pyobj *k = (kxvik_pyobj *)me;
2846   kludge64 t[25];
2847   const octet *q;
2848   octet buf[8];
2849   unsigned i;
2850   struct bin in;
2851   size_t n;
2852
2853   if (!PyArg_ParseTuple(arg, "O&:mix", convbin, &in)) goto end;
2854   if (in.sz > 200) VALERR("out of range");
2855   q = in.p; n = in.sz;
2856   i = 0;
2857   while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2858   if (n) {
2859     memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2860     LOAD64_L_(t[i], buf); i++;
2861   }
2862   keccak1600_mix(&k->s, t, i);
2863   RETURN_ME;
2864 end:
2865   return (0);
2866 }
2867
2868 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2869 {
2870   kxvik_pyobj *k = (kxvik_pyobj *)me;
2871   PyObject *rc = 0;
2872   kludge64 t[25];
2873   octet *q, buf[8];
2874   unsigned i;
2875   unsigned n;
2876
2877   if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2878   if (n > 200) VALERR("out of range");
2879   rc = bytestring_pywrap(0, n);
2880   q = (octet *)BIN_PTR(rc);
2881   keccak1600_extract(&k->s, t, (n + 7)/8);
2882   i = 0;
2883   while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2884   if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2885 end:
2886   return (rc);
2887 }
2888
2889 static PyObject *kxvikmeth_step(PyObject *me)
2890 {
2891   kxvik_pyobj *k = (kxvik_pyobj *)me;
2892   keccak1600_p(&k->s, &k->s, k->n);
2893   RETURN_ME;
2894 }
2895
2896 static const PyMemberDef kxvik_pymembers[] = {
2897 #define MEMBERSTRUCT kxvik_pyobj
2898   MEMRNM(nround, T_UINT, n, 0,      "KECCAC.nround -> number of rounds")
2899 #undef MEMBERSTRUCT
2900   { 0 }
2901 };
2902
2903 static const PyMethodDef kxvik_pymethods[] = {
2904 #define METHNAME(func) kxvikmeth_##func
2905   NAMETH(copy,          "KECCAK.copy() -> KECCAK'")
2906   METH  (mix,           "KECCAK.mix(DATA)")
2907   METH  (extract,       "KECCAK.extract(NOCTETS)")
2908   NAMETH(step,          "KECCAK.step()")
2909 #undef METHNAME
2910   { 0 }
2911 };
2912
2913 static const PyTypeObject kxvik_pytype_skel = {
2914   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2915   "Keccak1600",                         /* @tp_name@ */
2916   sizeof(kxvik_pyobj),                  /* @tp_basicsize@ */
2917   0,                                    /* @tp_itemsize@ */
2918
2919   0,                                    /* @tp_dealloc@ */
2920   0,                                    /* @tp_print@ */
2921   0,                                    /* @tp_getattr@ */
2922   0,                                    /* @tp_setattr@ */
2923   0,                                    /* @tp_compare@ */
2924   0,                                    /* @tp_repr@ */
2925   0,                                    /* @tp_as_number@ */
2926   0,                                    /* @tp_as_sequence@ */
2927   0,                                    /* @tp_as_mapping@ */
2928   0,                                    /* @tp_hash@ */
2929   0,                                    /* @tp_call@ */
2930   0,                                    /* @tp_str@ */
2931   0,                                    /* @tp_getattro@ */
2932   0,                                    /* @tp_setattro@ */
2933   0,                                    /* @tp_as_buffer@ */
2934   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2935     Py_TPFLAGS_BASETYPE,
2936
2937   /* @tp_doc@ */
2938   "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2939
2940   0,                                    /* @tp_traverse@ */
2941   0,                                    /* @tp_clear@ */
2942   0,                                    /* @tp_richcompare@ */
2943   0,                                    /* @tp_weaklistoffset@ */
2944   0,                                    /* @tp_iter@ */
2945   0,                                    /* @tp_iternext@ */
2946   PYMETHODS(kxvik),                     /* @tp_methods@ */
2947   PYMEMBERS(kxvik),                     /* @tp_members@ */
2948   0,                                    /* @tp_getset@ */
2949   0,                                    /* @tp_base@ */
2950   0,                                    /* @tp_dict@ */
2951   0,                                    /* @tp_descr_get@ */
2952   0,                                    /* @tp_descr_set@ */
2953   0,                                    /* @tp_dictoffset@ */
2954   0,                                    /* @tp_init@ */
2955   PyType_GenericAlloc,                  /* @tp_alloc@ */
2956   kxvik_pynew,                          /* @tp_new@ */
2957   0,                                    /* @tp_free@ */
2958   0                                     /* @tp_is_gc@ */
2959 };
2960
2961 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2962
2963 typedef struct shake_pyobj {
2964   PyObject_HEAD
2965   int st;
2966   shake_ctx h;
2967 } shake_pyobj;
2968
2969 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
2970 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
2971
2972 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
2973                                               const void *, size_t,
2974                                               const void *, size_t),
2975                                PyTypeObject *ty,
2976                                PyObject *arg, PyObject *kw)
2977 {
2978   shake_pyobj *rc = 0;
2979   struct bin p = { 0, 0 }, f = { 0, 0 };
2980   static const char *const kwlist[] = { "perso", "func", 0 };
2981
2982   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&:new", KWLIST,
2983                                    convbin, &p, convbin, &f))
2984     goto end;
2985   rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
2986   initfn(&rc->h, f.p, f.sz, p.p, p.sz);
2987   rc->st = 0;
2988 end:
2989   return ((PyObject *)rc);
2990 }
2991
2992 static PyObject *shake128_pynew(PyTypeObject *ty,
2993                                 PyObject *arg, PyObject *kw)
2994   { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
2995
2996 static PyObject *shake256_pynew(PyTypeObject *ty,
2997                                 PyObject *arg, PyObject *kw)
2998   { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
2999
3000 static int shake_check(PyObject *me, int st)
3001 {
3002   if (SHAKE_ST(me) != st) VALERR("wrong state");
3003   return (0);
3004 end:
3005   return (-1);
3006 }
3007
3008 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3009 {
3010   struct bin m;
3011   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
3012   if (shake_check(me, 0)) return (0);
3013   shake_hash(SHAKE_H(me), m.p, m.sz);
3014   RETURN_ME;
3015 }
3016
3017 #define SHAKEMETH_HASHU_(n, W, w)                                       \
3018   static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg)      \
3019   {                                                                     \
3020     uint##n x;                                                          \
3021     octet b[SZ_##W];                                                    \
3022     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3023     if (shake_check(me, 0)) return (0);                                 \
3024     STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b));              \
3025     RETURN_ME;                                                          \
3026   }
3027 DOUINTCONV(SHAKEMETH_HASHU_)
3028
3029 #define SHAKEMETH_HASHBUF_(n, W, w)                                     \
3030   static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg)    \
3031   {                                                                     \
3032     struct bin in;                                                      \
3033     octet b[SZ_##W];                                                    \
3034     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
3035     if (in.sz > MASK##n) TYERR("string too long");                      \
3036     if (shake_check(me, 0)) goto end;                                   \
3037     STORE##W(b, in.sz); shake_hash(SHAKE_H(me), b, sizeof(b));          \
3038     shake_hash(SHAKE_H(me), in.p, in.sz);                               \
3039     RETURN_ME;                                                          \
3040   end:                                                                  \
3041     return (0);                                                         \
3042   }
3043 DOUINTCONV(SHAKEMETH_HASHBUF_)
3044
3045 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3046 {
3047   char *p;
3048   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3049   if (shake_check(me, 0)) return (0);
3050   shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3051   RETURN_ME;
3052 }
3053
3054 static PyObject *shakemeth_xof(PyObject *me)
3055 {
3056   if (shake_check(me, 0)) goto end;
3057   shake_xof(SHAKE_H(me));
3058   SHAKE_ST(me) = 1;
3059   RETURN_ME;
3060 end:
3061   return (0);
3062 }
3063
3064 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
3065 {
3066   PyObject *rc = 0;
3067   size_t n;
3068   if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
3069   if (shake_check(me, 0)) goto end;
3070   rc = bytestring_pywrap(0, n);
3071   shake_done(SHAKE_H(me), BIN_PTR(rc), n);
3072   SHAKE_ST(me) = -1;
3073 end:
3074   return (rc);
3075 }
3076
3077 static PyObject *shakemeth_copy(PyObject *me)
3078 {
3079   shake_pyobj *rc = 0;
3080
3081   rc = PyObject_NEW(shake_pyobj, Py_TYPE(me));
3082   rc->h = *SHAKE_H(me);
3083   rc->st = SHAKE_ST(me);
3084   return ((PyObject *)rc);
3085 }
3086
3087 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3088 {
3089   PyObject *rc = 0;
3090   size_t sz;
3091
3092   if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3093   if (shake_check(me, 1)) goto end;
3094   rc = bytestring_pywrap(0, sz);
3095   shake_get(SHAKE_H(me), BIN_PTR(rc), sz);
3096 end:
3097   return (rc);
3098 }
3099
3100 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3101 {
3102   PyObject *rc = 0;
3103   struct bin in;
3104
3105   if (!PyArg_ParseTuple(arg, "O&:mask", convbin, &in)) goto end;
3106   if (shake_check(me, 1)) goto end;
3107   rc = bytestring_pywrap(0, in.sz);
3108   shake_mask(SHAKE_H(me), in.p, BIN_PTR(rc), in.sz);
3109 end:
3110   return (rc);
3111 }
3112
3113 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3114 {
3115   int st = SHAKE_ST(me);
3116   return (TEXT_FROMSTR(st == 0 ? "absorb" :
3117                        st == 1 ? "squeeze" : "dead"));
3118 }
3119
3120 static const PyMemberDef shake_pymembers[] = {
3121 #define MEMBERSTRUCT shake_pyobj
3122   MEMRNM(rate,  T_UINT, h.h.r, READONLY, "S.rate -> rate, in bytes")
3123   MEMRNM(buffered, T_UINT, h.h.n, READONLY,
3124                                    "S.buffered -> amount currently buffered")
3125 #undef MEMBERSTRUCT
3126   { 0 }
3127 };
3128
3129 static const PyGetSetDef shake_pygetset[] = {
3130 #define GETSETNAME(op, name) shake##op##_##name
3131   GET   (state,         "S.state -> `absorb', `squeeze', `dead'")
3132 #undef GETSETNAME
3133   { 0 }
3134 };
3135
3136 static const PyMethodDef shake_pymethods[] = {
3137 #define METHNAME(func) shakemeth_##func
3138   NAMETH(copy,          "S.copy() -> SS")
3139   METH  (hash,          "S.hash(M)")
3140 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3141   DOUINTCONV(METHU_)
3142 #undef METHU_
3143 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3144   DOUINTCONV(METHBUF_)
3145 #undef METHBUF_
3146   METH  (hashstrz,      "S.hashstrz(STRING)")
3147   NAMETH(xof,           "S.xof()")
3148   METH  (done,          "S.done(LEN) -> H")
3149   METH  (get,           "S.get(LEN) -> H")
3150   METH  (mask,          "S.mask(M) -> C")
3151 #undef METHNAME
3152   { 0 }
3153 };
3154
3155 static const PyTypeObject shake_pytype_skel = {
3156   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3157   "Shake",                              /* @tp_name@ */
3158   sizeof(shake_pyobj),                  /* @tp_basicsize@ */
3159   0,                                    /* @tp_itemsize@ */
3160
3161   0,                                    /* @tp_dealloc@ */
3162   0,                                    /* @tp_print@ */
3163   0,                                    /* @tp_getattr@ */
3164   0,                                    /* @tp_setattr@ */
3165   0,                                    /* @tp_compare@ */
3166   0,                                    /* @tp_repr@ */
3167   0,                                    /* @tp_as_number@ */
3168   0,                                    /* @tp_as_sequence@ */
3169   0,                                    /* @tp_as_mapping@ */
3170   0,                                    /* @tp_hash@ */
3171   0,                                    /* @tp_call@ */
3172   0,                                    /* @tp_str@ */
3173   0,                                    /* @tp_getattro@ */
3174   0,                                    /* @tp_setattro@ */
3175   0,                                    /* @tp_as_buffer@ */
3176   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3177     Py_TPFLAGS_BASETYPE,
3178
3179   /* @tp_doc@ */
3180   "SHAKE/cSHAKE/KMAC base class.",
3181
3182   0,                                    /* @tp_traverse@ */
3183   0,                                    /* @tp_clear@ */
3184   0,                                    /* @tp_richcompare@ */
3185   0,                                    /* @tp_weaklistoffset@ */
3186   0,                                    /* @tp_iter@ */
3187   0,                                    /* @tp_iternext@ */
3188   PYMETHODS(shake),                     /* @tp_methods@ */
3189   PYMEMBERS(shake),                     /* @tp_members@ */
3190   PYGETSET(shake),                      /* @tp_getset@ */
3191   0,                                    /* @tp_base@ */
3192   0,                                    /* @tp_dict@ */
3193   0,                                    /* @tp_descr_get@ */
3194   0,                                    /* @tp_descr_set@ */
3195   0,                                    /* @tp_dictoffset@ */
3196   0,                                    /* @tp_init@ */
3197   PyType_GenericAlloc,                  /* @tp_alloc@ */
3198   abstract_pynew,                       /* @tp_new@ */
3199   0,                                    /* @tp_free@ */
3200   0                                     /* @tp_is_gc@ */
3201 };
3202
3203 static const PyTypeObject shake128_pytype_skel = {
3204   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3205   "Shake128",                           /* @tp_name@ */
3206   0,                                    /* @tp_basicsize@ */
3207   0,                                    /* @tp_itemsize@ */
3208
3209   0,                                    /* @tp_dealloc@ */
3210   0,                                    /* @tp_print@ */
3211   0,                                    /* @tp_getattr@ */
3212   0,                                    /* @tp_setattr@ */
3213   0,                                    /* @tp_compare@ */
3214   0,                                    /* @tp_repr@ */
3215   0,                                    /* @tp_as_number@ */
3216   0,                                    /* @tp_as_sequence@ */
3217   0,                                    /* @tp_as_mapping@ */
3218   0,                                    /* @tp_hash@ */
3219   0,                                    /* @tp_call@ */
3220   0,                                    /* @tp_str@ */
3221   0,                                    /* @tp_getattro@ */
3222   0,                                    /* @tp_setattro@ */
3223   0,                                    /* @tp_as_buffer@ */
3224   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3225     Py_TPFLAGS_BASETYPE,
3226
3227   /* @tp_doc@ */
3228   "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3229
3230   0,                                    /* @tp_traverse@ */
3231   0,                                    /* @tp_clear@ */
3232   0,                                    /* @tp_richcompare@ */
3233   0,                                    /* @tp_weaklistoffset@ */
3234   0,                                    /* @tp_iter@ */
3235   0,                                    /* @tp_iternext@ */
3236   0,                                    /* @tp_methods@ */
3237   0,                                    /* @tp_members@ */
3238   0,                                    /* @tp_getset@ */
3239   0,                                    /* @tp_base@ */
3240   0,                                    /* @tp_dict@ */
3241   0,                                    /* @tp_descr_get@ */
3242   0,                                    /* @tp_descr_set@ */
3243   0,                                    /* @tp_dictoffset@ */
3244   0,                                    /* @tp_init@ */
3245   PyType_GenericAlloc,                  /* @tp_alloc@ */
3246   shake128_pynew,                       /* @tp_new@ */
3247   0,                                    /* @tp_free@ */
3248   0                                     /* @tp_is_gc@ */
3249 };
3250
3251 static const PyTypeObject shake256_pytype_skel = {
3252   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3253   "Shake256",                           /* @tp_name@ */
3254   0,                                    /* @tp_basicsize@ */
3255   0,                                    /* @tp_itemsize@ */
3256
3257   0,                                    /* @tp_dealloc@ */
3258   0,                                    /* @tp_print@ */
3259   0,                                    /* @tp_getattr@ */
3260   0,                                    /* @tp_setattr@ */
3261   0,                                    /* @tp_compare@ */
3262   0,                                    /* @tp_repr@ */
3263   0,                                    /* @tp_as_number@ */
3264   0,                                    /* @tp_as_sequence@ */
3265   0,                                    /* @tp_as_mapping@ */
3266   0,                                    /* @tp_hash@ */
3267   0,                                    /* @tp_call@ */
3268   0,                                    /* @tp_str@ */
3269   0,                                    /* @tp_getattro@ */
3270   0,                                    /* @tp_setattro@ */
3271   0,                                    /* @tp_as_buffer@ */
3272   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3273     Py_TPFLAGS_BASETYPE,
3274
3275   /* @tp_doc@ */
3276   "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3277
3278   0,                                    /* @tp_traverse@ */
3279   0,                                    /* @tp_clear@ */
3280   0,                                    /* @tp_richcompare@ */
3281   0,                                    /* @tp_weaklistoffset@ */
3282   0,                                    /* @tp_iter@ */
3283   0,                                    /* @tp_iternext@ */
3284   0,                                    /* @tp_methods@ */
3285   0,                                    /* @tp_members@ */
3286   0,                                    /* @tp_getset@ */
3287   0,                                    /* @tp_base@ */
3288   0,                                    /* @tp_dict@ */
3289   0,                                    /* @tp_descr_get@ */
3290   0,                                    /* @tp_descr_set@ */
3291   0,                                    /* @tp_dictoffset@ */
3292   0,                                    /* @tp_init@ */
3293   PyType_GenericAlloc,                  /* @tp_alloc@ */
3294   shake256_pynew,                       /* @tp_new@ */
3295   0,                                    /* @tp_free@ */
3296   0                                     /* @tp_is_gc@ */
3297 };
3298
3299 /*----- Pseudorandom permutations -----------------------------------------*/
3300
3301 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3302
3303 typedef struct prpinfo {
3304   const char *name;
3305   const octet *keysz;
3306   size_t ctxsz;
3307   size_t blksz;
3308   void (*init)(void *, const void *, size_t);
3309   void (*eblk)(void *, const void *, void *);
3310   void (*dblk)(void *, const void *, void *);
3311 } prpinfo;
3312
3313 #define PRP_DEF(PRE, pre)                                               \
3314   static void pre##_prpinit(void *ctx, const void *k, size_t ksz)       \
3315     { pre##_init(ctx, k, ksz); }                                        \
3316   static void pre##_prpeblk(void *ctx, const void *in, void *out)       \
3317   {                                                                     \
3318     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3319     pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3320   }                                                                     \
3321   static void pre##_prpdblk(void *ctx, const void *in, void *out)       \
3322   {                                                                     \
3323     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3324     pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3325   }                                                                     \
3326   static const prpinfo pre##_prpinfo = {                                \
3327     #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ,                  \
3328     pre##_prpinit, pre##_prpeblk, pre##_prpdblk                         \
3329   };
3330 PRPS(PRP_DEF)
3331
3332 static const struct prpinfo *const gprptab[] = {
3333 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3334   PRPS(PRP_ENTRY)
3335   0
3336 };
3337
3338 typedef struct gcprp_pyobj {
3339   PyHeapTypeObject ty;
3340   const prpinfo *prp;
3341 } gcprp_pyobj;
3342 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3343
3344 typedef struct gprp_pyobj {
3345   PyObject_HEAD
3346   const prpinfo *prp;
3347 } gprp_pyobj;
3348 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3349 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3350
3351 typedef struct prp {
3352   const prpinfo *prp;
3353   void *ctx;
3354 } prp;
3355
3356 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3357 {
3358   static const char *const kwlist[] = { "key", 0 };
3359   struct bin k;
3360   const prpinfo *prp = GCPRP_PRP(ty);
3361   PyObject *me;
3362
3363   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
3364     goto end;
3365   if (keysz(k.sz, prp->keysz) != k.sz) VALERR("bad key length");
3366   me = (PyObject *)ty->tp_alloc(ty, 0);
3367   GPRP_PRP(me) = prp;
3368   prp->init(GPRP_CTX(me), k.p, k.sz);
3369   Py_INCREF(me);
3370   return (me);
3371 end:
3372   return (0);
3373 }
3374
3375 static void gprp_pydealloc(PyObject *me)
3376   { Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
3377
3378 static PyObject *gcprp_pywrap(const prpinfo *prp)
3379 {
3380   gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3381   g->prp = prp;
3382   g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3383   g->ty.ht_type.tp_base = gprp_pytype;
3384   Py_INCREF(gprp_pytype);
3385   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3386                             Py_TPFLAGS_BASETYPE |
3387                             Py_TPFLAGS_HEAPTYPE);
3388   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3389   g->ty.ht_type.tp_free = 0;
3390   g->ty.ht_type.tp_new = gprp_pynew;
3391   typeready(&g->ty.ht_type);
3392   return ((PyObject *)g);
3393 }
3394
3395 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3396   { return (TEXT_FROMSTR(GCPRP_PRP(me)->name)); }
3397 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3398   { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3399 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3400   { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3401
3402 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3403 {
3404   struct bin m;
3405   PyObject *rc = 0;
3406
3407   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
3408   if (m.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3409   rc = bytestring_pywrap(0, m.sz);
3410   GPRP_PRP(me)->eblk(GPRP_CTX(me), m.p, BIN_PTR(rc));
3411 end:
3412   return (rc);
3413 }
3414
3415 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3416 {
3417   struct bin c;
3418   PyObject *rc = 0;
3419
3420   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
3421   if (c.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3422   rc = bytestring_pywrap(0, c.sz);
3423   GPRP_PRP(me)->dblk(GPRP_CTX(me), c.p, BIN_PTR(rc));
3424 end:
3425   return (rc);
3426 }
3427
3428 static const PyGetSetDef gcprp_pygetset[] = {
3429 #define GETSETNAME(op, name) gcp##op##_##name
3430   GET   (keysz,         "CP.keysz -> acceptable key sizes")
3431   GET   (blksz,         "CP.blksz -> block size")
3432   GET   (name,          "CP.name -> name of this kind of PRP")
3433 #undef GETSETNAME
3434   { 0 }
3435 };
3436
3437 static const PyMethodDef gprp_pymethods[] = {
3438 #define METHNAME(name) gpmeth_##name
3439   METH  (encrypt,       "P.encrypt(PT) -> CT")
3440   METH  (decrypt,       "P.decrypt(CT) -> PT")
3441 #undef METHNAME
3442   { 0 }
3443 };
3444
3445 static const PyTypeObject gcprp_pytype_skel = {
3446   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3447   "GCPRP",                              /* @tp_name@ */
3448   sizeof(gcprp_pyobj),                  /* @tp_basicsize@ */
3449   0,                                    /* @tp_itemsize@ */
3450
3451   0,                                    /* @tp_dealloc@ */
3452   0,                                    /* @tp_print@ */
3453   0,                                    /* @tp_getattr@ */
3454   0,                                    /* @tp_setattr@ */
3455   0,                                    /* @tp_compare@ */
3456   0,                                    /* @tp_repr@ */
3457   0,                                    /* @tp_as_number@ */
3458   0,                                    /* @tp_as_sequence@ */
3459   0,                                    /* @tp_as_mapping@ */
3460   0,                                    /* @tp_hash@ */
3461   0,                                    /* @tp_call@ */
3462   0,                                    /* @tp_str@ */
3463   0,                                    /* @tp_getattro@ */
3464   0,                                    /* @tp_setattro@ */
3465   0,                                    /* @tp_as_buffer@ */
3466   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3467     Py_TPFLAGS_BASETYPE,
3468
3469   /* @tp_doc@ */
3470   "Pseudorandom permutation metaclass.",
3471
3472   0,                                    /* @tp_traverse@ */
3473   0,                                    /* @tp_clear@ */
3474   0,                                    /* @tp_richcompare@ */
3475   0,                                    /* @tp_weaklistoffset@ */
3476   0,                                    /* @tp_iter@ */
3477   0,                                    /* @tp_iternext@ */
3478   0,                                    /* @tp_methods@ */
3479   0,                                    /* @tp_members@ */
3480   PYGETSET(gcprp),                      /* @tp_getset@ */
3481   0,                                    /* @tp_base@ */
3482   0,                                    /* @tp_dict@ */
3483   0,                                    /* @tp_descr_get@ */
3484   0,                                    /* @tp_descr_set@ */
3485   0,                                    /* @tp_dictoffset@ */
3486   0,                                    /* @tp_init@ */
3487   PyType_GenericAlloc,                  /* @tp_alloc@ */
3488   abstract_pynew,                       /* @tp_new@ */
3489   0,                                    /* @tp_free@ */
3490   0                                     /* @tp_is_gc@ */
3491 };
3492
3493 static const PyTypeObject gprp_pytype_skel = {
3494   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3495   "GPRP",                               /* @tp_name@ */
3496   sizeof(gprp_pyobj),                   /* @tp_basicsize@ */
3497   0,                                    /* @tp_itemsize@ */
3498
3499   gprp_pydealloc,                       /* @tp_dealloc@ */
3500   0,                                    /* @tp_print@ */
3501   0,                                    /* @tp_getattr@ */
3502   0,                                    /* @tp_setattr@ */
3503   0,                                    /* @tp_compare@ */
3504   0,                                    /* @tp_repr@ */
3505   0,                                    /* @tp_as_number@ */
3506   0,                                    /* @tp_as_sequence@ */
3507   0,                                    /* @tp_as_mapping@ */
3508   0,                                    /* @tp_hash@ */
3509   0,                                    /* @tp_call@ */
3510   0,                                    /* @tp_str@ */
3511   0,                                    /* @tp_getattro@ */
3512   0,                                    /* @tp_setattro@ */
3513   0,                                    /* @tp_as_buffer@ */
3514   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3515     Py_TPFLAGS_BASETYPE,
3516
3517   /* @tp_doc@ */
3518   "Pseudorandom permutation, abstract base class.",
3519
3520   0,                                    /* @tp_traverse@ */
3521   0,                                    /* @tp_clear@ */
3522   0,                                    /* @tp_richcompare@ */
3523   0,                                    /* @tp_weaklistoffset@ */
3524   0,                                    /* @tp_iter@ */
3525   0,                                    /* @tp_iternext@ */
3526   PYMETHODS(gprp),                      /* @tp_methods@ */
3527   0,                                    /* @tp_members@ */
3528   0,                                    /* @tp_getset@ */
3529   0,                                    /* @tp_base@ */
3530   0,                                    /* @tp_dict@ */
3531   0,                                    /* @tp_descr_get@ */
3532   0,                                    /* @tp_descr_set@ */
3533   0,                                    /* @tp_dictoffset@ */
3534   0,                                    /* @tp_init@ */
3535   PyType_GenericAlloc,                  /* @tp_alloc@ */
3536   abstract_pynew,                       /* @tp_new@ */
3537   0,                                    /* @tp_free@ */
3538   0                                     /* @tp_is_gc@ */
3539 };
3540
3541 /*----- Main code ---------------------------------------------------------*/
3542
3543 static const struct nameval consts[] = {
3544   CONST(AEADF_PCHSZ), CONST(AEADF_PCMSZ), CONST(AEADF_PCTSZ),
3545   CONST(AEADF_AADNDEP), CONST(AEADF_AADFIRST), CONST(AEADF_NOAAD),
3546   { 0 }
3547 };
3548
3549 static const PyMethodDef methods[] = {
3550 #define METHNAME(func) meth_##func
3551 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf,                  \
3552          "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3553   METH_HDANCE(hsalsa20, "HSalsa20")
3554   METH_HDANCE(hsalsa2012, "HSalsa20/12")
3555   METH_HDANCE(hsalsa208, "HSalsa20/8")
3556   METH_HDANCE(hchacha20, "HChaCha20")
3557   METH_HDANCE(hchacha12, "HChaCha12")
3558   METH_HDANCE(hchacha8, "HChaCha8")
3559 #undef METH_DANCE
3560 #undef METHNAME
3561   { 0 }
3562 };
3563
3564 void algorithms_pyinit(void)
3565 {
3566   INITTYPE(keysz, root);
3567   INITTYPE(keyszany, keysz);
3568   INITTYPE(keyszrange, keysz);
3569   INITTYPE(keyszset, keysz);
3570   INITTYPE(gccipher, type);
3571   INITTYPE(gcipher, root);
3572   INITTYPE(gcaead, type);
3573   INITTYPE(gaeadkey, root);
3574   INITTYPE(gcaeadaad, type);
3575   INITTYPE(gaeadaad, root);
3576   INITTYPE(gcaeadenc, type);
3577   INITTYPE(gaeadenc, root);
3578   INITTYPE(gcaeaddec, type);
3579   INITTYPE(gaeaddec, root);
3580   INITTYPE(gchash, type);
3581   INITTYPE(ghash, root);
3582   INITTYPE(gcmac, type);
3583   INITTYPE(gmac, type);
3584   INITTYPE(gmhash, ghash);
3585   INITTYPE(poly1305cls, type);
3586   INITTYPE_META(poly1305key, type, poly1305cls);
3587   INITTYPE(poly1305hash, root);
3588   INITTYPE(kxvik, root);
3589   INITTYPE(shake, root);
3590   INITTYPE(shake128, shake);
3591   INITTYPE(shake256, shake);
3592   INITTYPE(gcprp, type);
3593   INITTYPE(gprp, root);
3594   addmethods(methods);
3595 }
3596
3597 #define gcprp prpinfo
3598 #define CLASS_TABLES(_) _(cipher) _(aead) _(hash) _(mac) _(prp)
3599 #define TABLE_FNS(pre)                                                  \
3600   static const char *pre##_namefn(const void *p)                        \
3601     { const gc##pre *const *cls = p; return (*cls ? (*cls)->name : 0); } \
3602   static PyObject *pre##_valfn(const void *p)                           \
3603     { gc##pre *const*cls = p; return (gc##pre##_pywrap(*cls)); }
3604 CLASS_TABLES(TABLE_FNS)
3605
3606 void algorithms_pyinsert(PyObject *mod)
3607 {
3608   PyObject *d;
3609   INSERT("KeySZ", keysz_pytype);
3610   INSERT("KeySZAny", keyszany_pytype);
3611   INSERT("KeySZRange", keyszrange_pytype);
3612   INSERT("KeySZSet", keyszset_pytype);
3613   INSERT("GCCipher", gccipher_pytype);
3614   INSERT("GCipher", gcipher_pytype);
3615   INSERT("gcciphers", make_algtab(gciphertab, sizeof(gccipher *),
3616                                   cipher_namefn, cipher_valfn));
3617   INSERT("GCAEAD", gcaead_pytype);
3618   INSERT("GAEKey", gaeadkey_pytype);
3619   INSERT("GAEAADClass", gcaeadaad_pytype);
3620   INSERT("GAEAAD", gaeadaad_pytype);
3621   INSERT("GAEEncClass", gcaeadenc_pytype);
3622   INSERT("GAEEnc", gaeadenc_pytype);
3623   INSERT("GAEDecClass", gcaeaddec_pytype);
3624   INSERT("GAEDec", gaeaddec_pytype);
3625   INSERT("gcaeads", make_algtab(gaeadtab, sizeof(gcaead *),
3626                                 aead_namefn, aead_valfn));
3627   INSERT("GCHash", gchash_pytype);
3628   INSERT("GHash", ghash_pytype);
3629   d = make_algtab(ghashtab, sizeof(gchash *), hash_namefn, hash_valfn);
3630   INSERT("gchashes", d);
3631   sha_pyobj = PyMapping_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3632   has160_pyobj = PyMapping_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3633   INSERT("GCMAC", gcmac_pytype);
3634   INSERT("GMAC", gmac_pytype);
3635   INSERT("GMACHash", gmhash_pytype);
3636   INSERT("gcmacs", make_algtab(gmactab, sizeof(gcmac *),
3637                                mac_namefn, mac_valfn));
3638   INSERT("Poly1305Class", poly1305cls_pytype);
3639   INSERT("poly1305", poly1305key_pytype);
3640   INSERT("Poly1305Hash", poly1305hash_pytype);
3641   INSERT("Keccak1600", kxvik_pytype);
3642   INSERT("Shake", shake_pytype);
3643   INSERT("Shake128", shake128_pytype);
3644   INSERT("Shake256", shake256_pytype);
3645   INSERT("GCPRP", gcprp_pytype);
3646   INSERT("GPRP", gprp_pytype);
3647   INSERT("gcprps", make_algtab(gprptab, sizeof(gcprp *),
3648                                prp_namefn, prp_valfn));
3649   setconstants(mod, consts);
3650 }
3651
3652 /*----- That's all, folks -------------------------------------------------*/