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       PyObject *l;
  90       int i, n;
  91       o->dfl = ARG(0);
  92       for (i = 0; ARG(i); i++) ;
  93       n = i; l = PyList_New(n);
  94       for (i = 0; i < n; i++) PyList_SET_ITEM(l, i, PyInt_FromLong(ARG(i)));
  95       o->set = PyFrozenSet_New(l); Py_DECREF(l);
  96       return ((PyObject *)o);
  97     } break;
  98     default:
  99       abort();
 100   }
 101 #undef ARG
 102 }
 103
 104 static PyObject *keyszany_pynew(PyTypeObject *ty,
 105                                 PyObject *arg, PyObject *kw)
 106 {
 107   static const char *const kwlist[] = { "default", 0 };
 108   int dfl;
 109   keysz_pyobj *o;
 110
 111   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", KWLIST, &dfl))
 112     goto end;
 113   if (dfl < 0) VALERR("key size cannot be negative");
 114   o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
 115   o->dfl = dfl;
 116   return ((PyObject *)o);
 117 end:
 118   return (0);
 119 }
 120
 121 static PyObject *keyszrange_pynew(PyTypeObject *ty,
 122                                   PyObject *arg, PyObject *kw)
 123 {
 124   static const char *const kwlist[] = { "default", "min", "max", "mod", 0 };
 125   int dfl, min = 0, max, mod = 1;
 126   PyObject *maxobj = Py_None;
 127   keyszrange_pyobj *o;
 128
 129   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iOi:new", KWLIST,
 130                                    &dfl, &min, &maxobj, &mod))
 131     goto end;
 132   if (maxobj == Py_None)
 133     max = 0;
 134   else {
 135     max = PyInt_AsLong(maxobj);
 136     if (max == -1 && PyErr_Occurred()) goto end;
 137   }
 138   if (dfl < 0 || min < 0 || max < 0) VALERR("key size cannot be negative");
 139   if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
 140   if (mod <= 0 || dfl%mod || min%mod || max%mod)
 141     VALERR("bad key size modulus");
 142   o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
 143   o->dfl = dfl;
 144   o->min = min;
 145   o->max = max;
 146   o->mod = mod;
 147   return ((PyObject *)o);
 148 end:
 149   return (0);
 150 }
 151
 152 static PyObject *keyszset_pynew(PyTypeObject *ty,
 153                                 PyObject *arg, PyObject *kw)
 154 {
 155   static const char *const kwlist[] = { "default", "set", 0 };
 156   int dfl, xx;
 157   PyObject *set = 0;
 158   PyObject *x = 0, *l = 0, *i = 0;
 159   keyszset_pyobj *o = 0;
 160
 161   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
 162     goto end;
 163   if (set) i = PyObject_GetIter(set);
 164   else { set = PyTuple_New(0); i = PyObject_GetIter(set); Py_DECREF(set); }
 165   if (!i) goto end;
 166   l = PyList_New(0); if (!l) goto end;
 167   if (dfl < 0) VALERR("key size cannot be negative");
 168   x = PyInt_FromLong(dfl); PyList_Append(l, x); Py_DECREF(x); x = 0;
 169   for (;;) {
 170     x = PyIter_Next(i); if (!x) break;
 171     xx = PyInt_AsLong(x); if (xx == -1 && PyErr_Occurred()) goto end;
 172     if (xx < 0) VALERR("key size cannot be negative");
 173     PyList_Append(l, x); Py_DECREF(x); x = 0;
 174   }
 175   if ((set = PyFrozenSet_New(l)) == 0) goto end;
 176   o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
 177   o->dfl = dfl;
 178   o->set = set;
 179 end:
 180   Py_XDECREF(l);
 181   Py_XDECREF(x);
 182   return ((PyObject *)o);
 183 }
 184
 185 static PyObject *kaget_min(PyObject *me, void *hunoz)
 186   { return (PyInt_FromLong(0)); }
 187 static PyObject *kaget_max(PyObject *me, void *hunoz)
 188   { RETURN_NONE; }
 189
 190 static PyObject *krget_max(PyObject *me, void *hunoz)
 191 {
 192   int max = ((keyszrange_pyobj *)me)->max;
 193   if (max) return (PyInt_FromLong(max));
 194   else RETURN_NONE;
 195 }
 196
 197 static PyObject *ksget_min(PyObject *me, void *hunoz)
 198 {
 199   PyObject *i = PyObject_GetIter(((keyszset_pyobj *)me)->set);
 200   PyObject *v = 0;
 201   int y, x = -1;
 202   for (;;) {
 203     v = PyIter_Next(i); if (!v) break;
 204     y = PyInt_AsLong(v); assert(y >= 0);
 205     if (x == -1 || y < x) x = y;
 206   }
 207   Py_DECREF(i); Py_XDECREF(v);
 208   if (PyErr_Occurred()) return (0);
 209   return (PyInt_FromLong(x));
 210 }
 211
 212 static PyObject *ksget_max(PyObject *me, void *hunoz)
 213 {
 214   PyObject *i = PyObject_GetIter(((keyszset_pyobj *)me)->set);
 215   PyObject *v = 0;
 216   int y, x = -1;
 217   for (;;) {
 218     v = PyIter_Next(i); if (!v) break;
 219     y = PyInt_AsLong(v); assert(y >= 0);
 220     if (y > x) x = y;
 221   }
 222   Py_DECREF(i); Py_XDECREF(v);
 223   if (PyErr_Occurred()) return (0);
 224   return (PyInt_FromLong(x));
 225 }
 226
 227 static const PyMemberDef keysz_pymembers[] = {
 228 #define MEMBERSTRUCT keysz_pyobj
 229   MEMRNM(default, T_INT, dfl, READONLY, "KSZ.default -> default key size")
 230 #undef MEMBERSTRUCT
 231   { 0 }
 232 };
 233
 234 #define KSZCONVOP(op)                                                   \
 235   static PyObject *kszmeth_##op(PyObject *me, PyObject *arg)            \
 236   {                                                                     \
 237     double x, y;                                                        \
 238     if (!PyArg_ParseTuple(arg, "d:" #op, &x)) return (0);               \
 239     y = keysz_##op(x);                                                  \
 240     return (PyFloat_FromDouble(y));                                     \
 241   }
 242 KSZCONVOP(fromdl)
 243 KSZCONVOP(fromschnorr)
 244 KSZCONVOP(fromif)
 245 KSZCONVOP(fromec)
 246 KSZCONVOP(todl)
 247 KSZCONVOP(toschnorr)
 248 KSZCONVOP(toif)
 249 KSZCONVOP(toec)
 250 #undef KSZCONVOP
 251
 252 static const PyMethodDef keysz_pymethods[] = {
 253 #define METHNAME(name) kszmeth_##name
 254   SMTH  (fromdl,        "fromdl(N) -> M: "
 255                     "convert integer discrete log field size to work factor")
 256   SMTH  (fromschnorr, "fromschnorr(N) -> M: "
 257                                 "convert Schnorr group order to work factor")
 258   SMTH  (fromif,        "fromif(N) -> M: "
 259                  "convert integer factorization problem size to work factor")
 260   SMTH  (fromec,        "fromec(N) -> M: "
 261                          "convert elliptic curve group order to work factor")
 262   SMTH  (todl,          "todl(N) -> M: "
 263                     "convert work factor to integer discrete log field size")
 264   SMTH  (toschnorr,     "toschnorr(N) -> M: "
 265                                 "convert work factor to Schnorr group order")
 266   SMTH  (toif,          "toif(N) -> M: "
 267                  "convert work factor to integer factorization problem size")
 268   SMTH  (toec,          "toec(N) -> M: "
 269                          "convert work factor to elliptic curve group order")
 270   SMTH  (toec,          "toec(N) -> M: "
 271                          "convert work factor to elliptic curve group order")
 272 #undef METHNAME
 273   { 0 }
 274 };
 275
 276 static const PyGetSetDef keyszany_pygetset[] = {
 277 #define GETSETNAME(op, name) ka##op##_##name
 278   GET   (min,           "KSZ.min -> smallest allowed key size")
 279   GET   (max,           "KSZ.max -> largest allowed key size")
 280 #undef GETSETNAME
 281   { 0 }
 282 };
 283
 284 static const PyMemberDef keyszrange_pymembers[] = {
 285 #define MEMBERSTRUCT keyszrange_pyobj
 286   MEMBER(min,   T_INT,    READONLY, "KSZ.min -> smallest allowed key size")
 287   MEMBER(mod,   T_INT,    READONLY,
 288                             "KSZ.mod -> key size must be a multiple of this")
 289 #undef MEMBERSTRUCT
 290   { 0 }
 291 };
 292
 293 static const PyGetSetDef keyszrange_pygetset[] = {
 294 #define GETSETNAME(op, name) kr##op##_##name
 295   GET   (max,           "KSZ.max -> largest allowed key size")
 296 #undef GETSETNAME
 297   { 0 }
 298 };
 299
 300 static const PyGetSetDef keyszset_pygetset[] = {
 301 #define GETSETNAME(op, name) ks##op##_##name
 302   GET   (min,           "KSZ.min -> smallest allowed key size")
 303   GET   (max,           "KSZ.max -> largest allowed key size")
 304 #undef GETSETNAME
 305   { 0 }
 306 };
 307
 308 static const PyMemberDef keyszset_pymembers[] = {
 309 #define MEMBERSTRUCT keyszset_pyobj
 310   MEMBER(set,   T_OBJECT, READONLY, "KSZ.set -> allowed key sizes")
 311 #undef MEMBERSTRUCT
 312   { 0 }
 313 };
 314
 315 static const PyTypeObject keysz_pytype_skel = {
 316   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 317   "KeySZ",                              /* @tp_name@ */
 318   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 319   0,                                    /* @tp_itemsize@ */
 320
 321   0,                                    /* @tp_dealloc@ */
 322   0,                                    /* @tp_print@ */
 323   0,                                    /* @tp_getattr@ */
 324   0,                                    /* @tp_setattr@ */
 325   0,                                    /* @tp_compare@ */
 326   0,                                    /* @tp_repr@ */
 327   0,                                    /* @tp_as_number@ */
 328   0,                                    /* @tp_as_sequence@ */
 329   0,                                    /* @tp_as_mapping@ */
 330   0,                                    /* @tp_hash@ */
 331   0,                                    /* @tp_call@ */
 332   0,                                    /* @tp_str@ */
 333   0,                                    /* @tp_getattro@ */
 334   0,                                    /* @tp_setattro@ */
 335   0,                                    /* @tp_as_buffer@ */
 336   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 337     Py_TPFLAGS_BASETYPE,
 338
 339   /* @tp_doc@ */
 340   "Key size constraints.  Abstract.",
 341
 342   0,                                    /* @tp_traverse@ */
 343   0,                                    /* @tp_clear@ */
 344   0,                                    /* @tp_richcompare@ */
 345   0,                                    /* @tp_weaklistoffset@ */
 346   0,                                    /* @tp_iter@ */
 347   0,                                    /* @tp_iternext@ */
 348   PYMETHODS(keysz),                     /* @tp_methods@ */
 349   PYMEMBERS(keysz),                     /* @tp_members@ */
 350   0,                                    /* @tp_getset@ */
 351   0,                                    /* @tp_base@ */
 352   0,                                    /* @tp_dict@ */
 353   0,                                    /* @tp_descr_get@ */
 354   0,                                    /* @tp_descr_set@ */
 355   0,                                    /* @tp_dictoffset@ */
 356   0,                                    /* @tp_init@ */
 357   PyType_GenericAlloc,                  /* @tp_alloc@ */
 358   abstract_pynew,                       /* @tp_new@ */
 359   0,                                    /* @tp_free@ */
 360   0                                     /* @tp_is_gc@ */
 361 };
 362
 363 static const PyTypeObject keyszany_pytype_skel = {
 364   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 365   "KeySZAny",                           /* @tp_name@ */
 366   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 367   0,                                    /* @tp_itemsize@ */
 368
 369   0,                                    /* @tp_dealloc@ */
 370   0,                                    /* @tp_print@ */
 371   0,                                    /* @tp_getattr@ */
 372   0,                                    /* @tp_setattr@ */
 373   0,                                    /* @tp_compare@ */
 374   0,                                    /* @tp_repr@ */
 375   0,                                    /* @tp_as_number@ */
 376   0,                                    /* @tp_as_sequence@ */
 377   0,                                    /* @tp_as_mapping@ */
 378   0,                                    /* @tp_hash@ */
 379   0,                                    /* @tp_call@ */
 380   0,                                    /* @tp_str@ */
 381   0,                                    /* @tp_getattro@ */
 382   0,                                    /* @tp_setattro@ */
 383   0,                                    /* @tp_as_buffer@ */
 384   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 385     Py_TPFLAGS_BASETYPE,
 386
 387   /* @tp_doc@ */
 388   "KeySZAny(DEFAULT)\n"
 389   "  Key size constraints.  This object imposes no constraints on size.",
 390
 391   0,                                    /* @tp_traverse@ */
 392   0,                                    /* @tp_clear@ */
 393   0,                                    /* @tp_richcompare@ */
 394   0,                                    /* @tp_weaklistoffset@ */
 395   0,                                    /* @tp_iter@ */
 396   0,                                    /* @tp_iternext@ */
 397   0,                                    /* @tp_methods@ */
 398   0,                                    /* @tp_members@ */
 399   PYGETSET(keyszany),                   /* @tp_getset@ */
 400   0,                                    /* @tp_base@ */
 401   0,                                    /* @tp_dict@ */
 402   0,                                    /* @tp_descr_get@ */
 403   0,                                    /* @tp_descr_set@ */
 404   0,                                    /* @tp_dictoffset@ */
 405   0,                                    /* @tp_init@ */
 406   PyType_GenericAlloc,                  /* @tp_alloc@ */
 407   keyszany_pynew,                       /* @tp_new@ */
 408   0,                                    /* @tp_free@ */
 409   0                                     /* @tp_is_gc@ */
 410 };
 411
 412 static const PyTypeObject keyszrange_pytype_skel = {
 413   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 414   "KeySZRange",                         /* @tp_name@ */
 415   sizeof(keyszrange_pyobj),             /* @tp_basicsize@ */
 416   0,                                    /* @tp_itemsize@ */
 417
 418   0,                                    /* @tp_dealloc@ */
 419   0,                                    /* @tp_print@ */
 420   0,                                    /* @tp_getattr@ */
 421   0,                                    /* @tp_setattr@ */
 422   0,                                    /* @tp_compare@ */
 423   0,                                    /* @tp_repr@ */
 424   0,                                    /* @tp_as_number@ */
 425   0,                                    /* @tp_as_sequence@ */
 426   0,                                    /* @tp_as_mapping@ */
 427   0,                                    /* @tp_hash@ */
 428   0,                                    /* @tp_call@ */
 429   0,                                    /* @tp_str@ */
 430   0,                                    /* @tp_getattro@ */
 431   0,                                    /* @tp_setattro@ */
 432   0,                                    /* @tp_as_buffer@ */
 433   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 434     Py_TPFLAGS_BASETYPE,
 435
 436   /* @tp_doc@ */
 437   "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n"
 438   "  Key size constraints: size must be between MIN and MAX inclusive, and\n"
 439   "  be a multiple of MOD.",
 440
 441   0,                                    /* @tp_traverse@ */
 442   0,                                    /* @tp_clear@ */
 443   0,                                    /* @tp_richcompare@ */
 444   0,                                    /* @tp_weaklistoffset@ */
 445   0,                                    /* @tp_iter@ */
 446   0,                                    /* @tp_iternext@ */
 447   0,                                    /* @tp_methods@ */
 448   PYMEMBERS(keyszrange),                /* @tp_members@ */
 449   PYGETSET(keyszrange),                 /* @tp_getset@ */
 450   0,                                    /* @tp_base@ */
 451   0,                                    /* @tp_dict@ */
 452   0,                                    /* @tp_descr_get@ */
 453   0,                                    /* @tp_descr_set@ */
 454   0,                                    /* @tp_dictoffset@ */
 455   0,                                    /* @tp_init@ */
 456   PyType_GenericAlloc,                  /* @tp_alloc@ */
 457   keyszrange_pynew,                     /* @tp_new@ */
 458   0,                                    /* @tp_free@ */
 459   0                                     /* @tp_is_gc@ */
 460 };
 461
 462 static const PyTypeObject keyszset_pytype_skel = {
 463   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 464   "KeySZSet",                           /* @tp_name@ */
 465   sizeof(keyszset_pyobj),               /* @tp_basicsize@ */
 466   0,                                    /* @tp_itemsize@ */
 467
 468   0,                                    /* @tp_dealloc@ */
 469   0,                                    /* @tp_print@ */
 470   0,                                    /* @tp_getattr@ */
 471   0,                                    /* @tp_setattr@ */
 472   0,                                    /* @tp_compare@ */
 473   0,                                    /* @tp_repr@ */
 474   0,                                    /* @tp_as_number@ */
 475   0,                                    /* @tp_as_sequence@ */
 476   0,                                    /* @tp_as_mapping@ */
 477   0,                                    /* @tp_hash@ */
 478   0,                                    /* @tp_call@ */
 479   0,                                    /* @tp_str@ */
 480   0,                                    /* @tp_getattro@ */
 481   0,                                    /* @tp_setattro@ */
 482   0,                                    /* @tp_as_buffer@ */
 483   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 484     Py_TPFLAGS_BASETYPE,
 485
 486   /* @tp_doc@ */
 487   "KeySZSet(DEFAULT, ITER)\n"
 488   "  Key size constraints: size must be DEFAULT or an element of ITER.",
 489
 490   0,                                    /* @tp_traverse@ */
 491   0,                                    /* @tp_clear@ */
 492   0,                                    /* @tp_richcompare@ */
 493   0,                                    /* @tp_weaklistoffset@ */
 494   0,                                    /* @tp_iter@ */
 495   0,                                    /* @tp_iternext@ */
 496   0,                                    /* @tp_methods@ */
 497   PYMEMBERS(keyszset),                  /* @tp_members@ */
 498   PYGETSET(keyszset),                   /* @tp_getset@ */
 499   0,                                    /* @tp_base@ */
 500   0,                                    /* @tp_dict@ */
 501   0,                                    /* @tp_descr_get@ */
 502   0,                                    /* @tp_descr_set@ */
 503   0,                                    /* @tp_dictoffset@ */
 504   0,                                    /* @tp_init@ */
 505   PyType_GenericAlloc,                  /* @tp_alloc@ */
 506   keyszset_pynew,                       /* @tp_new@ */
 507   0,                                    /* @tp_free@ */
 508   0                                     /* @tp_is_gc@ */
 509 };
 510
 511 /*----- Symmetric encryption ----------------------------------------------*/
 512
 513 static PyTypeObject *gccipher_pytype, *gcipher_pytype;
 514
 515 typedef struct gccipher_pyobj {
 516   PyHeapTypeObject ty;
 517   gccipher *cc;
 518 } gccipher_pyobj;
 519
 520 #define GCCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gccipher_pytype)
 521 #define GCCIPHER_CC(o) (((gccipher_pyobj *)(o))->cc)
 522
 523 typedef struct gcipher_pyobj {
 524   PyObject_HEAD
 525   gcipher *c;
 526 } gcipher_pyobj;
 527
 528 #define GCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gcipher_pytype)
 529 #define GCIPHER_C(o) (((gcipher_pyobj *)(o))->c)
 530
 531 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
 532
 533 static PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
 534 {
 535   gcipher_pyobj *g;
 536   if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
 537   else Py_INCREF(cobj);
 538   g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
 539   g->c = c;
 540   return ((PyObject *)g);
 541 }
 542
 543 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 544 {
 545   static const char *const kwlist[] = { "k", 0 };
 546   struct bin k;
 547
 548   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
 549     goto end;
 550   if (keysz(k.sz, GCCIPHER_CC(ty)->keysz) != k.sz) VALERR("bad key length");
 551   return (gcipher_pywrap((PyObject *)ty,
 552                          GC_INIT(GCCIPHER_CC(ty), k.p, k.sz)));
 553 end:
 554   return (0);
 555 }
 556
 557 PyObject *gccipher_pywrap(gccipher *cc)
 558 {
 559   gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
 560   g->cc = cc;
 561   g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
 562   g->ty.ht_type.tp_base = gcipher_pytype;
 563   Py_INCREF(gcipher_pytype);
 564   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 565                             Py_TPFLAGS_BASETYPE |
 566                             Py_TPFLAGS_HEAPTYPE);
 567   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 568   g->ty.ht_type.tp_free = 0;
 569   g->ty.ht_type.tp_new = gcipher_pynew;
 570   typeready(&g->ty.ht_type);
 571   return ((PyObject *)g);
 572 }
 573
 574 static void gcipher_pydealloc(PyObject *me)
 575 {
 576   GC_DESTROY(GCIPHER_C(me));
 577   Py_DECREF(Py_TYPE(me));
 578   FREEOBJ(me);
 579 }
 580
 581 static PyObject *gccget_name(PyObject *me, void *hunoz)
 582   { return (TEXT_FROMSTR(GCCIPHER_CC(me)->name)); }
 583
 584 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
 585   { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
 586
 587 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
 588   { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
 589
 590 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
 591 {
 592   struct bin m;
 593   PyObject *rc = 0;
 594
 595   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) return (0);
 596   rc = bytestring_pywrap(0, m.sz);
 597   GC_ENCRYPT(GCIPHER_C(me), m.p, BIN_PTR(rc), m.sz);
 598   return (rc);
 599 }
 600
 601 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
 602 {
 603   char *p;
 604   int sz;
 605   PyObject *rc = 0;
 606
 607   if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
 608   rc = bytestring_pywrap(0, sz);
 609   p = BIN_PTR(rc);
 610   memset(p, 0, sz);
 611   GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
 612   return (rc);
 613 }
 614
 615 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
 616 {
 617   struct bin c;
 618   PyObject *rc = 0;
 619
 620   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) return (0);
 621   rc = bytestring_pywrap(0, c.sz);
 622   GC_DECRYPT(GCIPHER_C(me), c.p, BIN_PTR(rc), c.sz);
 623   return (rc);
 624 }
 625
 626 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
 627 {
 628   char *p;
 629   int sz;
 630   PyObject *rc = 0;
 631
 632   if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
 633   rc = bytestring_pywrap(0, sz);
 634   p = BIN_PTR(rc);
 635   memset(p, 0, sz);
 636   GC_DECRYPT(GCIPHER_C(me), p, p, sz);
 637   return (rc);
 638 }
 639
 640 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
 641 {
 642   struct bin iv;
 643
 644   if (!PyArg_ParseTuple(arg, "O&:setiv", convbin, &iv)) goto end;
 645   if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
 646   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 647   if (iv.sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
 648   GC_SETIV(GCIPHER_C(me), iv.p);
 649   RETURN_ME;
 650 end:
 651   return (0);
 652 }
 653
 654 static PyObject *gcmeth_bdry(PyObject *me)
 655 {
 656   if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
 657   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 658   GC_BDRY(GCIPHER_C(me));
 659   RETURN_ME;
 660 end:
 661   return (0);
 662 }
 663
 664 static const PyGetSetDef gccipher_pygetset[] = {
 665 #define GETSETNAME(op, name) gcc##op##_##name
 666   GET   (keysz,         "CC.keysz -> acceptable key sizes")
 667   GET   (blksz,         "CC.blksz -> block size, or zero")
 668   GET   (name,          "CC.name -> name of this kind of cipher")
 669 #undef GETSETNAME
 670   { 0 }
 671 };
 672
 673 static const PyMethodDef gcipher_pymethods[] = {
 674 #define METHNAME(name) gcmeth_##name
 675   METH  (encrypt,       "C.encrypt(PT) -> CT")
 676   METH  (enczero,       "C.enczero(N) -> CT")
 677   METH  (decrypt,       "C.decrypt(CT) -> PT")
 678   METH  (deczero,       "C.deczero(N) -> PT")
 679   METH  (setiv,         "C.setiv(IV)")
 680   NAMETH(bdry,          "C.bdry()")
 681 #undef METHNAME
 682   { 0 }
 683 };
 684
 685 static const PyTypeObject gccipher_pytype_skel = {
 686   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 687   "GCCipher",                           /* @tp_name@ */
 688   sizeof(gccipher_pyobj),               /* @tp_basicsize@ */
 689   0,                                    /* @tp_itemsize@ */
 690
 691   0,                                    /* @tp_dealloc@ */
 692   0,                                    /* @tp_print@ */
 693   0,                                    /* @tp_getattr@ */
 694   0,                                    /* @tp_setattr@ */
 695   0,                                    /* @tp_compare@ */
 696   0,                                    /* @tp_repr@ */
 697   0,                                    /* @tp_as_number@ */
 698   0,                                    /* @tp_as_sequence@ */
 699   0,                                    /* @tp_as_mapping@ */
 700   0,                                    /* @tp_hash@ */
 701   0,                                    /* @tp_call@ */
 702   0,                                    /* @tp_str@ */
 703   0,                                    /* @tp_getattro@ */
 704   0,                                    /* @tp_setattro@ */
 705   0,                                    /* @tp_as_buffer@ */
 706   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 707     Py_TPFLAGS_BASETYPE,
 708
 709   /* @tp_doc@ */
 710   "Symmetric cipher metaclass.",
 711
 712   0,                                    /* @tp_traverse@ */
 713   0,                                    /* @tp_clear@ */
 714   0,                                    /* @tp_richcompare@ */
 715   0,                                    /* @tp_weaklistoffset@ */
 716   0,                                    /* @tp_iter@ */
 717   0,                                    /* @tp_iternext@ */
 718   0,                                    /* @tp_methods@ */
 719   0,                                    /* @tp_members@ */
 720   PYGETSET(gccipher),                   /* @tp_getset@ */
 721   0,                                    /* @tp_base@ */
 722   0,                                    /* @tp_dict@ */
 723   0,                                    /* @tp_descr_get@ */
 724   0,                                    /* @tp_descr_set@ */
 725   0,                                    /* @tp_dictoffset@ */
 726   0,                                    /* @tp_init@ */
 727   PyType_GenericAlloc,                  /* @tp_alloc@ */
 728   abstract_pynew,                       /* @tp_new@ */
 729   0,                                    /* @tp_free@ */
 730   0                                     /* @tp_is_gc@ */
 731 };
 732
 733 static const PyTypeObject gcipher_pytype_skel = {
 734   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 735   "GCipher",                            /* @tp_name@ */
 736   sizeof(gcipher_pyobj),                /* @tp_basicsize@ */
 737   0,                                    /* @tp_itemsize@ */
 738
 739   gcipher_pydealloc,                    /* @tp_dealloc@ */
 740   0,                                    /* @tp_print@ */
 741   0,                                    /* @tp_getattr@ */
 742   0,                                    /* @tp_setattr@ */
 743   0,                                    /* @tp_compare@ */
 744   0,                                    /* @tp_repr@ */
 745   0,                                    /* @tp_as_number@ */
 746   0,                                    /* @tp_as_sequence@ */
 747   0,                                    /* @tp_as_mapping@ */
 748   0,                                    /* @tp_hash@ */
 749   0,                                    /* @tp_call@ */
 750   0,                                    /* @tp_str@ */
 751   0,                                    /* @tp_getattro@ */
 752   0,                                    /* @tp_setattro@ */
 753   0,                                    /* @tp_as_buffer@ */
 754   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 755     Py_TPFLAGS_BASETYPE,
 756
 757   /* @tp_doc@ */
 758   "Symmetric cipher, abstract base class.",
 759
 760   0,                                    /* @tp_traverse@ */
 761   0,                                    /* @tp_clear@ */
 762   0,                                    /* @tp_richcompare@ */
 763   0,                                    /* @tp_weaklistoffset@ */
 764   0,                                    /* @tp_iter@ */
 765   0,                                    /* @tp_iternext@ */
 766   PYMETHODS(gcipher),                   /* @tp_methods@ */
 767   0,                                    /* @tp_members@ */
 768   0,                                    /* @tp_getset@ */
 769   0,                                    /* @tp_base@ */
 770   0,                                    /* @tp_dict@ */
 771   0,                                    /* @tp_descr_get@ */
 772   0,                                    /* @tp_descr_set@ */
 773   0,                                    /* @tp_dictoffset@ */
 774   0,                                    /* @tp_init@ */
 775   PyType_GenericAlloc,                  /* @tp_alloc@ */
 776   abstract_pynew,                       /* @tp_new@ */
 777   0,                                    /* @tp_free@ */
 778   0                                     /* @tp_is_gc@ */
 779 };
 780
 781 /*----- Authenticated encryption ------------------------------------------*/
 782
 783 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
 784 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
 785 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
 786 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
 787
 788 typedef struct gcaead_pyobj {
 789   PyHeapTypeObject ty;
 790   gcaead *aec;
 791   struct gcaeadaad_pyobj *aad;
 792   struct gcaeadenc_pyobj *enc;
 793   struct gcaeaddec_pyobj *dec;
 794 } gcaead_pyobj;
 795
 796 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
 797 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
 798 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
 799 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
 800 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
 801 static PyObject *gcaead_pywrap(gcaead *);
 802
 803 typedef struct gaeadkey_pyobj {
 804   PyObject_HEAD
 805   gaead_key *k;
 806 } gaeadkey_pyobj;
 807
 808 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
 809 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
 810
 811 typedef struct gcaeadaad_pyobj {
 812   PyHeapTypeObject ty;
 813   gcaead_pyobj *key;
 814 } gcaeadaad_pyobj;
 815
 816 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
 817 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
 818
 819 typedef struct gaeadaad_pyobj {
 820   PyObject_HEAD
 821   gaead_aad *a;
 822   unsigned f;
 823 #define AEADF_DEAD 32768u
 824   size_t hsz, hlen;
 825 } gaeadaad_pyobj;
 826
 827 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
 828 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
 829 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
 830 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
 831 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
 832
 833 typedef struct gcaeadenc_pyobj {
 834   PyHeapTypeObject ty;
 835   gcaead_pyobj *key;
 836 } gcaeadenc_pyobj;
 837
 838 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
 839 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
 840                                  size_t, size_t, size_t);
 841
 842 typedef struct gaeadenc_pyobj {
 843   PyObject_HEAD
 844   gaead_enc *e;
 845   gaeadaad_pyobj *aad;
 846   unsigned f;
 847   size_t hsz, msz, tsz;
 848   size_t mlen;
 849 } gaeadenc_pyobj;
 850
 851 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
 852 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
 853 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
 854 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
 855 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
 856 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
 857 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
 858 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
 859
 860 typedef struct gcaeaddec_pyobj {
 861   PyHeapTypeObject ty;
 862   gcaead_pyobj *key;
 863 } gcaeaddec_pyobj;
 864
 865 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
 866 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
 867                                  size_t, size_t, size_t);
 868
 869 typedef struct gaeaddec_pyobj {
 870   PyObject_HEAD
 871   gaead_dec *d;
 872   gaeadaad_pyobj *aad;
 873   unsigned f;
 874   size_t hsz, csz, tsz;
 875   size_t clen;
 876 } gaeaddec_pyobj;
 877
 878 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
 879 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
 880 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
 881 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
 882 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
 883 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
 884 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
 885 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
 886
 887 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
 888 {
 889   gaeadkey_pyobj *gk;
 890
 891   if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
 892   else Py_INCREF(cobj);
 893   gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
 894   gk->k = k;
 895   return ((PyObject *)gk);
 896 }
 897
 898 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
 899                                 PyObject *arg, PyObject *kw)
 900 {
 901   static const char *const kwlist[] = { "k", 0 };
 902   struct bin k;
 903
 904   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
 905     goto end;
 906   if (keysz(k.sz, GCAEAD_AEC(ty)->keysz) != k.sz) VALERR("bad key length");
 907   return (gaeadkey_pywrap((PyObject *)ty,
 908                           GAEAD_KEY(GCAEAD_AEC(ty), k.p, k.sz)));
 909 end:
 910   return (0);
 911 }
 912
 913 static PyObject *gcaead_pywrap(gcaead *aec)
 914 {
 915   gcaead_pyobj *gck;
 916   gcaeadaad_pyobj *gca;
 917   gcaeadenc_pyobj *gce;
 918   gcaeaddec_pyobj *gcd;
 919
 920 #define MKTYPE(obj, thing, newfn, namefmt) do {                         \
 921   (obj) = newtype(gcaead_pytype, 0, 0);                                 \
 922   (obj)->ty.ht_name = TEXT_FORMAT(namefmt, aec->name);                  \
 923   (obj)->ty.ht_type.tp_name = TEXT_PTR((obj)->ty.ht_name);              \
 924   (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj);        \
 925   (obj)->ty.ht_type.tp_base = gaead##thing##_pytype;                    \
 926   Py_INCREF(gaead##thing##_pytype);                                     \
 927   (obj)->ty.ht_type.tp_flags =                                          \
 928     (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE);   \
 929   (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc;                     \
 930   (obj)->ty.ht_type.tp_free = 0;                                        \
 931   (obj)->ty.ht_type.tp_new = newfn;                                     \
 932   typeready(&(obj)->ty.ht_type);                                        \
 933 } while (0)
 934
 935   MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
 936   MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
 937   MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
 938   MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
 939
 940 #undef MKTYPE
 941
 942   gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
 943   gca->key = gce->key = gcd->key = gck;
 944   return ((PyObject *)gck);
 945 }
 946
 947 static void gaeadkey_pydealloc(PyObject *me)
 948   { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
 949
 950 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
 951   { return (TEXT_FROMSTR(GCAEAD_AEC(me)->name)); }
 952
 953 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
 954   { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
 955
 956 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
 957   { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
 958
 959 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
 960   { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
 961
 962 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
 963   { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
 964
 965 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
 966   { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
 967
 968 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
 969   { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
 970
 971 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
 972   { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
 973
 974 static const PyGetSetDef gcaead_pygetset[] = {
 975 #define GETSETNAME(op, name) gcae##op##_##name
 976   GET   (keysz,         "AEC.keysz -> acceptable key sizes")
 977   GET   (noncesz,       "AEC.noncesz -> acceptable nonce sizes")
 978   GET   (tagsz,         "AEC.tagsz -> acceptable tag sizes")
 979   GET   (blksz,         "AEC.blksz -> block size, or zero")
 980   GET   (bufsz,         "AEC.bufsz -> amount of data buffered internally")
 981   GET   (ohd,           "AEC.ohd -> maximum encryption overhead")
 982   GET   (name,          "AEC.name -> name of this kind of AEAD scheme")
 983   GET   (flags,         "AEC.flags -> mask of `AEADF_...' flags")
 984 #undef GETSETNAME
 985   { 0 }
 986 };
 987
 988 static PyObject *gaekmeth_aad(PyObject *me)
 989 {
 990   const gaead_key *k = GAEADKEY_K(me);
 991   PyObject *rc = 0;
 992
 993   if (k->ops->c->f&AEADF_AADNDEP)
 994     VALERR("aad must be associated with enc/dec op");
 995   rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(Py_TYPE(me)),
 996                        GAEAD_AAD(k), 0, 0);
 997 end:
 998   return (rc);
 999 }
1000
1001 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
1002                              PyObject *hszobj, size_t *hsz_out,
1003                              PyObject *mszobj, size_t *msz_out,
1004                              PyObject *tszobj, size_t *tsz_out)
1005 {
1006   unsigned f = 0, miss;
1007   int rc = -1;
1008
1009   if (hszobj != Py_None)
1010     { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
1011   if (mszobj != Py_None)
1012     { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
1013   if (tszobj != Py_None)
1014     { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
1015   miss = aec->f&~f;
1016   if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1017   if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1018   if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1019   if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1020   if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1021     VALERR("bad tag length");
1022   *f_out = f | aec->f; rc = 0;
1023 end:
1024   return (rc);
1025 }
1026
1027 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1028 {
1029   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1030   const gaead_key *k = GAEADKEY_K(me);
1031   gaead_enc *e;
1032   PyObject *rc = 0;
1033   struct bin n;
1034   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1035   size_t hsz = 0, msz = 0, tsz = 0;
1036   unsigned f;
1037
1038   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1039                                    convbin, &n, &hszobj, &mszobj, &tszobj))
1040     goto end;
1041   if (check_aead_encdec(k->ops->c, &f, n.sz,
1042                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1043     goto end;
1044   e = GAEAD_ENC(GAEADKEY_K(me), n.p, n.sz, hsz, msz, tsz);
1045   if (!e) VALERR("bad aead parameter combination");
1046   rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(Py_TYPE(me)),
1047                        e, f, hsz, msz, tsz);
1048 end:
1049   return (rc);
1050 }
1051
1052 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1053 {
1054   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1055   const gaead_key *k = GAEADKEY_K(me);
1056   gaead_dec *d;
1057   PyObject *rc = 0;
1058   struct bin n;
1059   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1060   size_t hsz = 0, csz = 0, tsz = 0;
1061   unsigned f;
1062
1063   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:dec", KWLIST,
1064                                    convbin, &n, &hszobj, &cszobj, &tszobj))
1065     goto end;
1066   if (check_aead_encdec(k->ops->c, &f, n.sz,
1067                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1068     goto end;
1069   d = GAEAD_DEC(GAEADKEY_K(me), n.p, n.sz, hsz, csz, tsz);
1070   if (!d) VALERR("bad aead parameter combination");
1071   rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(Py_TYPE(me)),
1072                        d, f, hsz, csz, tsz);
1073 end:
1074   return (rc);
1075 }
1076
1077 static const PyMethodDef gaeadkey_pymethods[] = {
1078 #define METHNAME(name) gaekmeth_##name
1079   NAMETH(aad,           "KEY.aad() -> AAD")
1080   KWMETH(enc,           "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1081   KWMETH(dec,           "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1082 #undef METHNAME
1083   { 0 }
1084 };
1085
1086 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1087                                  unsigned f, size_t hsz)
1088 {
1089   gaeadaad_pyobj *ga;
1090
1091   assert(cobj); Py_INCREF(cobj);
1092   ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1093   ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1094   return ((PyObject *)ga);
1095 }
1096
1097 static void gaeadaad_pydealloc(PyObject *me)
1098 {
1099   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1100
1101   if (ga->a) GAEAD_DESTROY(ga->a);
1102   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1103 }
1104
1105 static int gaea_check(PyObject *me)
1106 {
1107   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1108   int rc = -1;
1109
1110   if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1111   rc = 0;
1112 end:
1113   return (rc);
1114 }
1115
1116 static void gaea_invalidate(gaeadaad_pyobj *ga)
1117   { if (ga) ga->f |= AEADF_DEAD; }
1118
1119 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1120 {
1121   gaeadaad_pyobj *ga = *ga_inout;
1122   if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1123 }
1124
1125 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1126 {
1127   if (gaea_check(me)) return (0);
1128   else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1129   else RETURN_NONE;
1130 }
1131
1132 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1133   { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1134
1135 static const PyGetSetDef gaeadaad_pygetset[] = {
1136 #define GETSETNAME(op, name) gaea##op##_##name
1137   GET   (hsz,           "AAD.hsz -> precommitted header length or `None'")
1138   GET   (hlen,          "AAD.hlen -> header length so far")
1139 #undef GETSETNAME
1140   { 0 }
1141 };
1142
1143 static PyObject *gaeameth_copy(PyObject *me)
1144 {
1145   PyObject *rc = 0;
1146
1147   if (gaea_check(me)) goto end;
1148   if (GAEADAAD_F(me)&AEADF_AADNDEP)
1149     VALERR("can't duplicate nonce-dependent aad");
1150   rc = gaeadaad_pywrap((PyObject *)Py_TYPE(me),
1151                        GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1152   GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1153 end:
1154   return (rc);
1155 }
1156
1157 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1158 {
1159   gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1160   int rc = -1;
1161
1162   if (gaea_check(me)) goto end;
1163   if ((ga->f&AEADF_NOAAD) && hsz)
1164     VALERR("header data not permitted");
1165   if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1166     VALERR("too large for precommitted header length");
1167   GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1168   rc = 0;
1169 end:
1170   return (rc);
1171 }
1172
1173 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1174 {
1175   struct bin h;
1176
1177   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &h)) return (0);
1178   if (gaeadaad_hash(me, h.p, h.sz)) return (0);
1179   RETURN_ME;
1180 }
1181
1182 #define GAEAMETH_HASHU_(n, W, w)                                        \
1183   static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg)       \
1184   {                                                                     \
1185     uint##n x; octet b[SZ_##W];                                         \
1186     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1187     STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0);    \
1188     RETURN_ME;                                                          \
1189   }
1190 DOUINTCONV(GAEAMETH_HASHU_)
1191
1192 #define GAEAMETH_HASHBUF_(n, W, w)                                      \
1193   static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg)     \
1194   {                                                                     \
1195     struct bin in; octet b[SZ_##W];                                     \
1196     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
1197     if (in.sz > MASK##n) VALERR("too large");                           \
1198     STORE##W(b, in.sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end;  \
1199     if (gaeadaad_hash(me, in.p, in.sz)) goto end;                       \
1200     RETURN_ME;                                                          \
1201   end:                                                                  \
1202     return (0);                                                         \
1203   }
1204 DOUINTCONV(GAEAMETH_HASHBUF_)
1205
1206 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1207 {
1208   char *p;
1209   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1210   if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1211   RETURN_ME;
1212 }
1213
1214 static const PyMethodDef gaeadaad_pymethods[] = {
1215 #define METHNAME(name) gaeameth_##name
1216   NAMETH(copy,          "AAD.copy() -> AAD'")
1217   METH  (hash,          "AAD.hash(H)")
1218 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1219   DOUINTCONV(METHU_)
1220 #undef METHU_
1221 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1222   DOUINTCONV(METHBUF_)
1223 #undef METHBUF_
1224   METH  (hashstrz,      "AAD.hashstrz(STRING)")
1225 #undef METHNAME
1226   { 0 }
1227 };
1228
1229 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1230                                  size_t hsz, size_t msz, size_t tsz)
1231 {
1232   gaeadenc_pyobj *ge;
1233
1234   assert(cobj); Py_INCREF(cobj);
1235   ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1236   ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1237   ge->aad = 0; ge->mlen = 0;
1238   return ((PyObject *)ge);
1239 }
1240
1241 static void gaeadenc_pydealloc(PyObject *me)
1242 {
1243   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1244
1245   gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1246   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1247 }
1248
1249 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1250 {
1251   if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1252   else RETURN_NONE;
1253 }
1254
1255 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1256 {
1257   if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1258   else RETURN_NONE;
1259 }
1260
1261 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1262 {
1263   if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1264   else RETURN_NONE;
1265 }
1266
1267 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1268   { return getulong(GAEADENC_MLEN(me)); }
1269
1270 static const PyGetSetDef gaeadenc_pygetset[] = {
1271 #define GETSETNAME(op, name) gaee##op##_##name
1272   GET   (hsz,           "ENC.hsz -> precommitted header length or `None'")
1273   GET   (msz,           "ENC.msz -> precommitted message length or `None'")
1274   GET   (tsz,           "ENC.tsz -> precommitted tag length or `None'")
1275   GET   (mlen,          "ENC.mlen -> message length so far")
1276 #undef GETSETNAME
1277   { 0 }
1278 };
1279
1280 static PyObject *gaeemeth_aad(PyObject *me)
1281 {
1282   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1283   PyObject *rc = 0;
1284
1285   if (!(ge->f&AEADF_AADNDEP))
1286     rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1287                          GAEAD_AAD(ge->e), 0, 0);
1288   else {
1289     if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1290       VALERR("too late for aad");
1291     if (!ge->aad)
1292       ge->aad = (gaeadaad_pyobj *)
1293         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1294                         GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1295                         ge->hsz);
1296     Py_INCREF(ge->aad);
1297     rc = (PyObject *)ge->aad;
1298   }
1299 end:
1300   return (rc);
1301 }
1302
1303 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1304 {
1305   static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1306   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1307   struct bin n;
1308   PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1309   size_t hsz = 0, msz = 0, tsz = 0;
1310   unsigned f;
1311
1312   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1313                                    convbin, &n, &hszobj, &mszobj, &tszobj))
1314     goto end;
1315   if (check_aead_encdec(ge->e->ops->c, &f, n.sz,
1316                         hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1317     goto end;
1318   if (GAEAD_REINIT(ge->e, n.p, n.sz, hsz, msz, tsz))
1319     VALERR("bad aead parameter combination");
1320   gaea_sever(&ge->aad);
1321   ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1322 end:
1323   return (0);
1324 }
1325
1326 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1327 {
1328   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1329   struct bin m;
1330   char *c = 0; size_t csz; buf b;
1331   int err;
1332   PyObject *rc = 0;
1333
1334   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
1335   if (ge->f&AEADF_AADFIRST) {
1336     if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1337       VALERR("header doesn't match precommitted length");
1338     gaea_invalidate(ge->aad);
1339   }
1340   if ((ge->f&AEADF_PCMSZ) && m.sz > ge->msz - ge->mlen)
1341     VALERR("too large for precommitted message length");
1342   csz = m.sz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1343   err = GAEAD_ENCRYPT(ge->e, m.p, m.sz, &b); assert(!err); (void)err;
1344   buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += m.sz;
1345 end:
1346   xfree(c);
1347   return (rc);
1348 }
1349
1350 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1351 {
1352   static const char *const kwlist[] = { "tsz", "aad", 0 };
1353   gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1354   PyObject *aad = Py_None;
1355   char *c = 0; size_t csz; buf b;
1356   PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1357   int err;
1358   PyObject *rc = 0;
1359
1360   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1361                                    &tszobj, &aad))
1362     goto end;
1363   if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1364   if (aad != Py_None &&
1365       !PyObject_TypeCheck(aad,
1366                           (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1367     TYERR("wanted aad");
1368   if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1369     VALERR("mismatched aad");
1370   if ((ge->f&AEADF_PCHSZ) &&
1371       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1372     VALERR("header doesn't match precommitted length");
1373   if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1374     VALERR("message doesn't match precommitted length");
1375   if (tszobj == Py_None) {
1376     if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1377     else tsz = keysz(0, ge->e->ops->c->tagsz);
1378   } else {
1379     if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1380       VALERR("tag length doesn't match precommitted value");
1381     if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1382   }
1383   csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1384   tag = bytestring_pywrap(0, tsz);
1385   err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1386                    BIN_PTR(tag), tsz);
1387   assert(!err); (void)err;
1388   buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1389 end:
1390   xfree(c);
1391   return (rc);
1392 }
1393
1394 static const PyMethodDef gaeadenc_pymethods[] = {
1395 #define METHNAME(name) gaeemeth_##name
1396   NAMETH(aad,           "ENC.aad() -> AAD")
1397   KWMETH(reinit,        "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1398   METH  (encrypt,       "ENC.encrypt(MSG) -> CT")
1399   KWMETH(done,          "ENC.done([tsz], [aad]) -> CT, TAG")
1400 #undef METHNAME
1401   { 0 }
1402 };
1403
1404 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1405                                  size_t hsz, size_t csz, size_t tsz)
1406 {
1407   gaeaddec_pyobj *gd;
1408   assert(cobj); Py_INCREF(cobj);
1409   gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1410   gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1411   gd->aad = 0; gd->clen = 0;
1412   return ((PyObject *)gd);
1413 }
1414
1415 static void gaeaddec_pydealloc(PyObject *me)
1416 {
1417   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1418
1419   gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1420   Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1421 }
1422
1423 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1424 {
1425   if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1426   else RETURN_NONE;
1427 }
1428
1429 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1430 {
1431   if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1432   else RETURN_NONE;
1433 }
1434
1435 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1436 {
1437   if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1438   else RETURN_NONE;
1439 }
1440
1441 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1442   { return getulong(GAEADDEC_CLEN(me)); }
1443
1444 static const PyGetSetDef gaeaddec_pygetset[] = {
1445 #define GETSETNAME(op, name) gaed##op##_##name
1446   GET   (hsz,           "DEC.hsz -> precommitted header length or `None'")
1447   GET   (csz,          "DEC.csz -> precommitted ciphertext length or `None'")
1448   GET   (tsz,           "DEC.tsz -> precommitted tag length or `None'")
1449   GET   (clen,          "DEC.clen -> ciphertext length so far")
1450 #undef GETSETNAME
1451   { 0 }
1452 };
1453
1454 static PyObject *gaedmeth_aad(PyObject *me)
1455 {
1456   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1457
1458   if (!(gd->f&AEADF_AADNDEP))
1459     return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(Py_TYPE(gd))->aad,
1460                             GAEAD_AAD(gd->d), 0, 0));
1461   else {
1462     if (!gd->aad)
1463       gd->aad = (gaeadaad_pyobj *)
1464         gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(gd))->aad,
1465                         GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1466                         gd->hsz);
1467     Py_INCREF(gd->aad);
1468     return ((PyObject *)gd->aad);
1469   }
1470 }
1471
1472 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1473 {
1474   static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1475   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1476   struct bin n;
1477   PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1478   size_t hsz = 0, csz = 0, tsz = 0;
1479   unsigned f;
1480
1481   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1482                                    convbin, &n, &hszobj, &cszobj, &tszobj))
1483     goto end;
1484   if (check_aead_encdec(gd->d->ops->c, &f, n.sz,
1485                         hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1486     goto end;
1487   if (GAEAD_REINIT(gd->d, n.p, n.sz, hsz, csz, tsz))
1488     VALERR("bad aead parameter combination");
1489   gaea_sever(&gd->aad);
1490   gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1491 end:
1492   return (0);
1493 }
1494
1495 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1496 {
1497   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1498   struct bin c;
1499   char *m = 0; size_t msz; buf b;
1500   int err;
1501   PyObject *rc = 0;
1502
1503   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
1504   if (gd->f&AEADF_AADFIRST) {
1505     if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1506       VALERR("header doesn't match precommitted length");
1507     gaea_invalidate(gd->aad);
1508   }
1509   if ((gd->f&AEADF_PCMSZ) && c.sz > gd->csz - gd->clen)
1510     VALERR("too large for precommitted message length");
1511   msz = c.sz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1512   err = GAEAD_DECRYPT(gd->d, c.p, c.sz, &b); assert(!err); (void)err;
1513   buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += c.sz;
1514 end:
1515   xfree(m);
1516   return (rc);
1517 }
1518
1519 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1520 {
1521   static const char *const kwlist[] = { "tag", "aad", 0 };
1522   gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1523   PyObject *aad = Py_None;
1524   struct bin t;
1525   char *m = 0; size_t msz; buf b;
1526   int err;
1527   PyObject *rc = 0;
1528
1529   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:done", KWLIST,
1530                                    convbin, &t, &aad))
1531     goto end;
1532   if (aad != Py_None &&
1533       !PyObject_TypeCheck(aad,
1534                           (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1535     TYERR("wanted aad");
1536   if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1537     VALERR("mismatched aad");
1538   if ((gd->f&AEADF_PCHSZ) &&
1539       (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1540     VALERR("header doesn't match precommitted length");
1541   if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1542     VALERR("message doesn't match precommitted length");
1543   if ((gd->f&AEADF_PCTSZ) && t.sz != gd->tsz)
1544     VALERR("tag length doesn't match precommitted value");
1545   if (keysz(t.sz, gd->d->ops->c->tagsz) != t.sz) VALERR("bad tag length");
1546   msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1547   err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad),
1548                    &b, t.p, t.sz);
1549   assert(err >= 0);
1550   if (!err) VALERR("decryption failed");
1551   buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1552 end:
1553   xfree(m);
1554   return (rc);
1555 }
1556
1557 static const PyMethodDef gaeaddec_pymethods[] = {
1558 #define METHNAME(name) gaedmeth_##name
1559   NAMETH(aad,           "DEC.aad() -> AAD")
1560   KWMETH(reinit,        "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1561   METH  (decrypt,       "DEC.decrypt(CT) -> MSG")
1562   KWMETH(done,          "DEC.done(TAG, [aad]) -> MSG | None")
1563 #undef METHNAME
1564   { 0 }
1565 };
1566
1567 static const PyTypeObject gcaead_pytype_skel = {
1568   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1569   "GCAEAD",                             /* @tp_name@ */
1570   sizeof(gcaead_pyobj),                 /* @tp_basicsize@ */
1571   0,                                    /* @tp_itemsize@ */
1572
1573   0,                                    /* @tp_dealloc@ */
1574   0,                                    /* @tp_print@ */
1575   0,                                    /* @tp_getattr@ */
1576   0,                                    /* @tp_setattr@ */
1577   0,                                    /* @tp_compare@ */
1578   0,                                    /* @tp_repr@ */
1579   0,                                    /* @tp_as_number@ */
1580   0,                                    /* @tp_as_sequence@ */
1581   0,                                    /* @tp_as_mapping@ */
1582   0,                                    /* @tp_hash@ */
1583   0,                                    /* @tp_call@ */
1584   0,                                    /* @tp_str@ */
1585   0,                                    /* @tp_getattro@ */
1586   0,                                    /* @tp_setattro@ */
1587   0,                                    /* @tp_as_buffer@ */
1588   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1589     Py_TPFLAGS_BASETYPE,
1590
1591   /* @tp_doc@ */
1592   "Authenticated encryption (key) metaclass.",
1593
1594   0,                                    /* @tp_traverse@ */
1595   0,                                    /* @tp_clear@ */
1596   0,                                    /* @tp_richcompare@ */
1597   0,                                    /* @tp_weaklistoffset@ */
1598   0,                                    /* @tp_iter@ */
1599   0,                                    /* @tp_iternext@ */
1600   0,                                    /* @tp_methods@ */
1601   0,                                    /* @tp_members@ */
1602   PYGETSET(gcaead),                     /* @tp_getset@ */
1603   0,                                    /* @tp_base@ */
1604   0,                                    /* @tp_dict@ */
1605   0,                                    /* @tp_descr_get@ */
1606   0,                                    /* @tp_descr_set@ */
1607   0,                                    /* @tp_dictoffset@ */
1608   0,                                    /* @tp_init@ */
1609   PyType_GenericAlloc,                  /* @tp_alloc@ */
1610   abstract_pynew,                       /* @tp_new@ */
1611   0,                                    /* @tp_free@ */
1612   0                                     /* @tp_is_gc@ */
1613 };
1614
1615 static const PyTypeObject gaeadkey_pytype_skel = {
1616   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1617   "GAEKey",                             /* @tp_name@ */
1618   sizeof(gaeadkey_pyobj),               /* @tp_basicsize@ */
1619   0,                                    /* @tp_itemsize@ */
1620
1621   gaeadkey_pydealloc,                   /* @tp_dealloc@ */
1622   0,                                    /* @tp_print@ */
1623   0,                                    /* @tp_getattr@ */
1624   0,                                    /* @tp_setattr@ */
1625   0,                                    /* @tp_compare@ */
1626   0,                                    /* @tp_repr@ */
1627   0,                                    /* @tp_as_number@ */
1628   0,                                    /* @tp_as_sequence@ */
1629   0,                                    /* @tp_as_mapping@ */
1630   0,                                    /* @tp_hash@ */
1631   0,                                    /* @tp_call@ */
1632   0,                                    /* @tp_str@ */
1633   0,                                    /* @tp_getattro@ */
1634   0,                                    /* @tp_setattro@ */
1635   0,                                    /* @tp_as_buffer@ */
1636   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1637     Py_TPFLAGS_BASETYPE,
1638
1639   /* @tp_doc@ */
1640   "Authenticated encryption key.",
1641
1642   0,                                    /* @tp_traverse@ */
1643   0,                                    /* @tp_clear@ */
1644   0,                                    /* @tp_richcompare@ */
1645   0,                                    /* @tp_weaklistoffset@ */
1646   0,                                    /* @tp_iter@ */
1647   0,                                    /* @tp_iternext@ */
1648   PYMETHODS(gaeadkey),                  /* @tp_methods@ */
1649   0,                                    /* @tp_members@ */
1650   0,                                    /* @tp_getset@ */
1651   0,                                    /* @tp_base@ */
1652   0,                                    /* @tp_dict@ */
1653   0,                                    /* @tp_descr_get@ */
1654   0,                                    /* @tp_descr_set@ */
1655   0,                                    /* @tp_dictoffset@ */
1656   0,                                    /* @tp_init@ */
1657   PyType_GenericAlloc,                  /* @tp_alloc@ */
1658   abstract_pynew,                       /* @tp_new@ */
1659   0,                                    /* @tp_free@ */
1660   0                                     /* @tp_is_gc@ */
1661 };
1662
1663 static const PyTypeObject gcaeadaad_pytype_skel = {
1664   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1665   "GAEAADClass",                        /* @tp_name@ */
1666   sizeof(gcaeadaad_pyobj),              /* @tp_basicsize@ */
1667   0,                                    /* @tp_itemsize@ */
1668
1669   0,                                    /* @tp_dealloc@ */
1670   0,                                    /* @tp_print@ */
1671   0,                                    /* @tp_getattr@ */
1672   0,                                    /* @tp_setattr@ */
1673   0,                                    /* @tp_compare@ */
1674   0,                                    /* @tp_repr@ */
1675   0,                                    /* @tp_as_number@ */
1676   0,                                    /* @tp_as_sequence@ */
1677   0,                                    /* @tp_as_mapping@ */
1678   0,                                    /* @tp_hash@ */
1679   0,                                    /* @tp_call@ */
1680   0,                                    /* @tp_str@ */
1681   0,                                    /* @tp_getattro@ */
1682   0,                                    /* @tp_setattro@ */
1683   0,                                    /* @tp_as_buffer@ */
1684   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1685     Py_TPFLAGS_BASETYPE,
1686
1687   /* @tp_doc@ */
1688   "Authenticated encryption additional-data hash metaclass.",
1689
1690   0,                                    /* @tp_traverse@ */
1691   0,                                    /* @tp_clear@ */
1692   0,                                    /* @tp_richcompare@ */
1693   0,                                    /* @tp_weaklistoffset@ */
1694   0,                                    /* @tp_iter@ */
1695   0,                                    /* @tp_iternext@ */
1696   0,                                    /* @tp_methods@ */
1697   0,                                    /* @tp_members@ */
1698   0,                                    /* @tp_getset@ */
1699   0,                                    /* @tp_base@ */
1700   0,                                    /* @tp_dict@ */
1701   0,                                    /* @tp_descr_get@ */
1702   0,                                    /* @tp_descr_set@ */
1703   0,                                    /* @tp_dictoffset@ */
1704   0,                                    /* @tp_init@ */
1705   PyType_GenericAlloc,                  /* @tp_alloc@ */
1706   abstract_pynew,                       /* @tp_new@ */
1707   0,                                    /* @tp_free@ */
1708   0                                     /* @tp_is_gc@ */
1709 };
1710
1711 static const PyTypeObject gaeadaad_pytype_skel = {
1712   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1713   "GAEAAD",                             /* @tp_name@ */
1714   sizeof(gaeadaad_pyobj),               /* @tp_basicsize@ */
1715   0,                                    /* @tp_itemsize@ */
1716
1717   gaeadaad_pydealloc,                   /* @tp_dealloc@ */
1718   0,                                    /* @tp_print@ */
1719   0,                                    /* @tp_getattr@ */
1720   0,                                    /* @tp_setattr@ */
1721   0,                                    /* @tp_compare@ */
1722   0,                                    /* @tp_repr@ */
1723   0,                                    /* @tp_as_number@ */
1724   0,                                    /* @tp_as_sequence@ */
1725   0,                                    /* @tp_as_mapping@ */
1726   0,                                    /* @tp_hash@ */
1727   0,                                    /* @tp_call@ */
1728   0,                                    /* @tp_str@ */
1729   0,                                    /* @tp_getattro@ */
1730   0,                                    /* @tp_setattro@ */
1731   0,                                    /* @tp_as_buffer@ */
1732   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1733     Py_TPFLAGS_BASETYPE,
1734
1735   /* @tp_doc@ */
1736   "Authenticated encryption AAD hash.",
1737
1738   0,                                    /* @tp_traverse@ */
1739   0,                                    /* @tp_clear@ */
1740   0,                                    /* @tp_richcompare@ */
1741   0,                                    /* @tp_weaklistoffset@ */
1742   0,                                    /* @tp_iter@ */
1743   0,                                    /* @tp_iternext@ */
1744   PYMETHODS(gaeadaad),                  /* @tp_methods@ */
1745   0,                                    /* @tp_members@ */
1746   PYGETSET(gaeadaad),                   /* @tp_getset@ */
1747   0,                                    /* @tp_base@ */
1748   0,                                    /* @tp_dict@ */
1749   0,                                    /* @tp_descr_get@ */
1750   0,                                    /* @tp_descr_set@ */
1751   0,                                    /* @tp_dictoffset@ */
1752   0,                                    /* @tp_init@ */
1753   PyType_GenericAlloc,                  /* @tp_alloc@ */
1754   abstract_pynew,                       /* @tp_new@ */
1755   0,                                    /* @tp_free@ */
1756   0                                     /* @tp_is_gc@ */
1757 };
1758
1759 static const PyTypeObject gcaeadenc_pytype_skel = {
1760   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1761   "GAEEncClass",                        /* @tp_name@ */
1762   sizeof(gcaeadenc_pyobj),              /* @tp_basicsize@ */
1763   0,                                    /* @tp_itemsize@ */
1764
1765   0,                                    /* @tp_dealloc@ */
1766   0,                                    /* @tp_print@ */
1767   0,                                    /* @tp_getattr@ */
1768   0,                                    /* @tp_setattr@ */
1769   0,                                    /* @tp_compare@ */
1770   0,                                    /* @tp_repr@ */
1771   0,                                    /* @tp_as_number@ */
1772   0,                                    /* @tp_as_sequence@ */
1773   0,                                    /* @tp_as_mapping@ */
1774   0,                                    /* @tp_hash@ */
1775   0,                                    /* @tp_call@ */
1776   0,                                    /* @tp_str@ */
1777   0,                                    /* @tp_getattro@ */
1778   0,                                    /* @tp_setattro@ */
1779   0,                                    /* @tp_as_buffer@ */
1780   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1781     Py_TPFLAGS_BASETYPE,
1782
1783   /* @tp_doc@ */
1784   "Authenticated encryption operation metaclass.",
1785
1786   0,                                    /* @tp_traverse@ */
1787   0,                                    /* @tp_clear@ */
1788   0,                                    /* @tp_richcompare@ */
1789   0,                                    /* @tp_weaklistoffset@ */
1790   0,                                    /* @tp_iter@ */
1791   0,                                    /* @tp_iternext@ */
1792   0,                                    /* @tp_methods@ */
1793   0,                                    /* @tp_members@ */
1794   0,                                    /* @tp_getset@ */
1795   0,                                    /* @tp_base@ */
1796   0,                                    /* @tp_dict@ */
1797   0,                                    /* @tp_descr_get@ */
1798   0,                                    /* @tp_descr_set@ */
1799   0,                                    /* @tp_dictoffset@ */
1800   0,                                    /* @tp_init@ */
1801   PyType_GenericAlloc,                  /* @tp_alloc@ */
1802   abstract_pynew,                       /* @tp_new@ */
1803   0,                                    /* @tp_free@ */
1804   0                                     /* @tp_is_gc@ */
1805 };
1806
1807 static const PyTypeObject gaeadenc_pytype_skel = {
1808   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1809   "GAEEnc",                             /* @tp_name@ */
1810   sizeof(gaeadenc_pyobj),               /* @tp_basicsize@ */
1811   0,                                    /* @tp_itemsize@ */
1812
1813   gaeadenc_pydealloc,                   /* @tp_dealloc@ */
1814   0,                                    /* @tp_print@ */
1815   0,                                    /* @tp_getattr@ */
1816   0,                                    /* @tp_setattr@ */
1817   0,                                    /* @tp_compare@ */
1818   0,                                    /* @tp_repr@ */
1819   0,                                    /* @tp_as_number@ */
1820   0,                                    /* @tp_as_sequence@ */
1821   0,                                    /* @tp_as_mapping@ */
1822   0,                                    /* @tp_hash@ */
1823   0,                                    /* @tp_call@ */
1824   0,                                    /* @tp_str@ */
1825   0,                                    /* @tp_getattro@ */
1826   0,                                    /* @tp_setattro@ */
1827   0,                                    /* @tp_as_buffer@ */
1828   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1829     Py_TPFLAGS_BASETYPE,
1830
1831   /* @tp_doc@ */
1832   "Authenticated encryption operation.",
1833
1834   0,                                    /* @tp_traverse@ */
1835   0,                                    /* @tp_clear@ */
1836   0,                                    /* @tp_richcompare@ */
1837   0,                                    /* @tp_weaklistoffset@ */
1838   0,                                    /* @tp_iter@ */
1839   0,                                    /* @tp_iternext@ */
1840   PYMETHODS(gaeadenc),                  /* @tp_methods@ */
1841   0,                                    /* @tp_members@ */
1842   PYGETSET(gaeadenc),                   /* @tp_getset@ */
1843   0,                                    /* @tp_base@ */
1844   0,                                    /* @tp_dict@ */
1845   0,                                    /* @tp_descr_get@ */
1846   0,                                    /* @tp_descr_set@ */
1847   0,                                    /* @tp_dictoffset@ */
1848   0,                                    /* @tp_init@ */
1849   PyType_GenericAlloc,                  /* @tp_alloc@ */
1850   abstract_pynew,                       /* @tp_new@ */
1851   0,                                    /* @tp_free@ */
1852   0                                     /* @tp_is_gc@ */
1853 };
1854
1855 static const PyTypeObject gcaeaddec_pytype_skel = {
1856   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1857   "GAEDecClass",                        /* @tp_name@ */
1858   sizeof(gcaeaddec_pyobj),              /* @tp_basicsize@ */
1859   0,                                    /* @tp_itemsize@ */
1860
1861   0,                                    /* @tp_dealloc@ */
1862   0,                                    /* @tp_print@ */
1863   0,                                    /* @tp_getattr@ */
1864   0,                                    /* @tp_setattr@ */
1865   0,                                    /* @tp_compare@ */
1866   0,                                    /* @tp_repr@ */
1867   0,                                    /* @tp_as_number@ */
1868   0,                                    /* @tp_as_sequence@ */
1869   0,                                    /* @tp_as_mapping@ */
1870   0,                                    /* @tp_hash@ */
1871   0,                                    /* @tp_call@ */
1872   0,                                    /* @tp_str@ */
1873   0,                                    /* @tp_getattro@ */
1874   0,                                    /* @tp_setattro@ */
1875   0,                                    /* @tp_as_buffer@ */
1876   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1877     Py_TPFLAGS_BASETYPE,
1878
1879   /* @tp_doc@ */
1880   "Authenticated decryption operation metaclass.",
1881
1882   0,                                    /* @tp_traverse@ */
1883   0,                                    /* @tp_clear@ */
1884   0,                                    /* @tp_richcompare@ */
1885   0,                                    /* @tp_weaklistoffset@ */
1886   0,                                    /* @tp_iter@ */
1887   0,                                    /* @tp_iternext@ */
1888   0,                                    /* @tp_methods@ */
1889   0,                                    /* @tp_members@ */
1890   0,                                    /* @tp_getset@ */
1891   0,                                    /* @tp_base@ */
1892   0,                                    /* @tp_dict@ */
1893   0,                                    /* @tp_descr_get@ */
1894   0,                                    /* @tp_descr_set@ */
1895   0,                                    /* @tp_dictoffset@ */
1896   0,                                    /* @tp_init@ */
1897   PyType_GenericAlloc,                  /* @tp_alloc@ */
1898   abstract_pynew,                       /* @tp_new@ */
1899   0,                                    /* @tp_free@ */
1900   0                                     /* @tp_is_gc@ */
1901 };
1902
1903 static const PyTypeObject gaeaddec_pytype_skel = {
1904   PyVarObject_HEAD_INIT(0, 0)           /* Header */
1905   "GAEDec",                             /* @tp_name@ */
1906   sizeof(gaeaddec_pyobj),               /* @tp_basicsize@ */
1907   0,                                    /* @tp_itemsize@ */
1908
1909   gaeaddec_pydealloc,                   /* @tp_dealloc@ */
1910   0,                                    /* @tp_print@ */
1911   0,                                    /* @tp_getattr@ */
1912   0,                                    /* @tp_setattr@ */
1913   0,                                    /* @tp_compare@ */
1914   0,                                    /* @tp_repr@ */
1915   0,                                    /* @tp_as_number@ */
1916   0,                                    /* @tp_as_sequence@ */
1917   0,                                    /* @tp_as_mapping@ */
1918   0,                                    /* @tp_hash@ */
1919   0,                                    /* @tp_call@ */
1920   0,                                    /* @tp_str@ */
1921   0,                                    /* @tp_getattro@ */
1922   0,                                    /* @tp_setattro@ */
1923   0,                                    /* @tp_as_buffer@ */
1924   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1925     Py_TPFLAGS_BASETYPE,
1926
1927   /* @tp_doc@ */
1928   "Authenticated decryption operation.",
1929
1930   0,                                    /* @tp_traverse@ */
1931   0,                                    /* @tp_clear@ */
1932   0,                                    /* @tp_richcompare@ */
1933   0,                                    /* @tp_weaklistoffset@ */
1934   0,                                    /* @tp_iter@ */
1935   0,                                    /* @tp_iternext@ */
1936   PYMETHODS(gaeaddec),                  /* @tp_methods@ */
1937   0,                                    /* @tp_members@ */
1938   PYGETSET(gaeaddec),                   /* @tp_getset@ */
1939   0,                                    /* @tp_base@ */
1940   0,                                    /* @tp_dict@ */
1941   0,                                    /* @tp_descr_get@ */
1942   0,                                    /* @tp_descr_set@ */
1943   0,                                    /* @tp_dictoffset@ */
1944   0,                                    /* @tp_init@ */
1945   PyType_GenericAlloc,                  /* @tp_alloc@ */
1946   abstract_pynew,                       /* @tp_new@ */
1947   0,                                    /* @tp_free@ */
1948   0                                     /* @tp_is_gc@ */
1949 };
1950
1951 /*----- Hash functions ----------------------------------------------------*/
1952
1953 PyTypeObject *gchash_pytype;
1954 static PyTypeObject *ghash_pytype;
1955 PyObject *sha_pyobj, *has160_pyobj;
1956
1957 typedef struct ghash_pyobj {
1958   PyObject_HEAD
1959   ghash *h;
1960 } ghash_pyobj;
1961
1962 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1963 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1964
1965 CONVFUNC(gchash, gchash *, GCHASH_CH)
1966 CONVFUNC(ghash, ghash *, GHASH_H)
1967
1968 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1969 {
1970   static const char *const kwlist[] = { 0 };
1971   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1972     goto end;
1973   return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1974 end:
1975   return (0);
1976 }
1977
1978 static PyObject *gchash_pywrap(gchash *ch)
1979 {
1980   gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1981   g->ch = ch;
1982   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1983   g->ty.ht_type.tp_base = ghash_pytype;
1984   Py_INCREF(ghash_pytype);
1985   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1986                             Py_TPFLAGS_BASETYPE |
1987                             Py_TPFLAGS_HEAPTYPE);
1988   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1989   g->ty.ht_type.tp_free = 0;
1990   g->ty.ht_type.tp_new = ghash_pynew;
1991   typeready(&g->ty.ht_type);
1992   return ((PyObject *)g);
1993 }
1994
1995 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1996 {
1997   ghash_pyobj *g;
1998   if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1999   else Py_INCREF(cobj);
2000   g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
2001   g->h = h;
2002   return ((PyObject *)g);
2003 }
2004
2005 static void ghash_pydealloc(PyObject *me)
2006 {
2007   GH_DESTROY(GHASH_H(me));
2008   Py_DECREF(Py_TYPE(me));
2009   FREEOBJ(me);
2010 }
2011
2012 static PyObject *gchget_name(PyObject *me, void *hunoz)
2013   { return (TEXT_FROMSTR(GCHASH_CH(me)->name)); }
2014
2015 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
2016   { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2017
2018 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2019   { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2020
2021 static PyObject *ghmeth_copy(PyObject *me)
2022   { return (ghash_pywrap((PyObject *)Py_TYPE(me), GH_COPY(GHASH_H(me)))); }
2023
2024 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2025 {
2026   struct bin m;
2027   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2028   GH_HASH(GHASH_H(me), m.p, m.sz);
2029   RETURN_ME;
2030 }
2031
2032 #define GHMETH_HASHU_(n, W, w)                                          \
2033   static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg)         \
2034   {                                                                     \
2035     uint##n x;                                                          \
2036     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2037     GH_HASHU##W(GHASH_H(me), x);                                        \
2038     RETURN_ME;                                                          \
2039   }
2040 DOUINTCONV(GHMETH_HASHU_)
2041
2042 #define GHMETH_HASHBUF_(n, W, w)                                        \
2043   static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg)       \
2044   {                                                                     \
2045     struct bin in;                                                      \
2046     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2047     if (in.sz > MASK##n) VALERR("too large");                           \
2048     GH_HASHBUF##W(GHASH_H(me), in.p, in.sz);                            \
2049     RETURN_ME;                                                          \
2050   end:                                                                  \
2051     return (0);                                                         \
2052   }
2053 DOUINTCONV(GHMETH_HASHBUF_)
2054
2055 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2056 {
2057   char *p;
2058   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2059   GH_HASHSTRZ(GHASH_H(me), p);
2060   RETURN_ME;
2061 }
2062
2063 static PyObject *ghmeth_done(PyObject *me)
2064 {
2065   ghash *g;
2066   PyObject *rc;
2067   g = GH_COPY(GHASH_H(me));
2068   rc = bytestring_pywrap(0, g->ops->c->hashsz);
2069   GH_DONE(g, BIN_PTR(rc));
2070   GH_DESTROY(g);
2071   return (rc);
2072 }
2073
2074 static const PyGetSetDef gchash_pygetset[] = {
2075 #define GETSETNAME(op, name) gch##op##_##name
2076   GET   (bufsz,         "CH.bufsz -> hash buffer size, or zero")
2077   GET   (hashsz,        "CH.hashsz -> hash output size")
2078   GET   (name,          "CH.name -> name of this kind of hash")
2079 #undef GETSETNAME
2080   { 0 }
2081 };
2082
2083 static const PyMethodDef ghash_pymethods[] = {
2084 #define METHNAME(name) ghmeth_##name
2085   NAMETH(copy,          "H.copy() -> HH")
2086   METH  (hash,          "H.hash(M)")
2087 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2088   DOUINTCONV(METHU_)
2089 #undef METHU_
2090 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2091   DOUINTCONV(METHBUF_)
2092 #undef METHBUF_
2093   METH  (hashstrz,      "H.hashstrz(STRING)")
2094   NAMETH(done,          "H.done() -> HASH")
2095 #undef METHNAME
2096   { 0 }
2097 };
2098
2099 static const PyTypeObject gchash_pytype_skel = {
2100   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2101   "GCHash",                             /* @tp_name@ */
2102   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2103   0,                                    /* @tp_itemsize@ */
2104
2105   0,                                    /* @tp_dealloc@ */
2106   0,                                    /* @tp_print@ */
2107   0,                                    /* @tp_getattr@ */
2108   0,                                    /* @tp_setattr@ */
2109   0,                                    /* @tp_compare@ */
2110   0,                                    /* @tp_repr@ */
2111   0,                                    /* @tp_as_number@ */
2112   0,                                    /* @tp_as_sequence@ */
2113   0,                                    /* @tp_as_mapping@ */
2114   0,                                    /* @tp_hash@ */
2115   0,                                    /* @tp_call@ */
2116   0,                                    /* @tp_str@ */
2117   0,                                    /* @tp_getattro@ */
2118   0,                                    /* @tp_setattro@ */
2119   0,                                    /* @tp_as_buffer@ */
2120   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2121     Py_TPFLAGS_BASETYPE,
2122
2123   /* @tp_doc@ */
2124   "Hash function metaclass.",
2125
2126   0,                                    /* @tp_traverse@ */
2127   0,                                    /* @tp_clear@ */
2128   0,                                    /* @tp_richcompare@ */
2129   0,                                    /* @tp_weaklistoffset@ */
2130   0,                                    /* @tp_iter@ */
2131   0,                                    /* @tp_iternext@ */
2132   0,                                    /* @tp_methods@ */
2133   0,                                    /* @tp_members@ */
2134   PYGETSET(gchash),                     /* @tp_getset@ */
2135   0,                                    /* @tp_base@ */
2136   0,                                    /* @tp_dict@ */
2137   0,                                    /* @tp_descr_get@ */
2138   0,                                    /* @tp_descr_set@ */
2139   0,                                    /* @tp_dictoffset@ */
2140   0,                                    /* @tp_init@ */
2141   PyType_GenericAlloc,                  /* @tp_alloc@ */
2142   abstract_pynew,                       /* @tp_new@ */
2143   0,                                    /* @tp_free@ */
2144   0                                     /* @tp_is_gc@ */
2145 };
2146
2147 static const PyTypeObject ghash_pytype_skel = {
2148   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2149   "GHash",                              /* @tp_name@ */
2150   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2151   0,                                    /* @tp_itemsize@ */
2152
2153   ghash_pydealloc,                      /* @tp_dealloc@ */
2154   0,                                    /* @tp_print@ */
2155   0,                                    /* @tp_getattr@ */
2156   0,                                    /* @tp_setattr@ */
2157   0,                                    /* @tp_compare@ */
2158   0,                                    /* @tp_repr@ */
2159   0,                                    /* @tp_as_number@ */
2160   0,                                    /* @tp_as_sequence@ */
2161   0,                                    /* @tp_as_mapping@ */
2162   0,                                    /* @tp_hash@ */
2163   0,                                    /* @tp_call@ */
2164   0,                                    /* @tp_str@ */
2165   0,                                    /* @tp_getattro@ */
2166   0,                                    /* @tp_setattro@ */
2167   0,                                    /* @tp_as_buffer@ */
2168   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2169     Py_TPFLAGS_BASETYPE,
2170
2171   /* @tp_doc@ */
2172   "Hash function, abstract base class.",
2173
2174   0,                                    /* @tp_traverse@ */
2175   0,                                    /* @tp_clear@ */
2176   0,                                    /* @tp_richcompare@ */
2177   0,                                    /* @tp_weaklistoffset@ */
2178   0,                                    /* @tp_iter@ */
2179   0,                                    /* @tp_iternext@ */
2180   PYMETHODS(ghash),                     /* @tp_methods@ */
2181   0,                                    /* @tp_members@ */
2182   0,                                    /* @tp_getset@ */
2183   0,                                    /* @tp_base@ */
2184   0,                                    /* @tp_dict@ */
2185   0,                                    /* @tp_descr_get@ */
2186   0,                                    /* @tp_descr_set@ */
2187   0,                                    /* @tp_dictoffset@ */
2188   0,                                    /* @tp_init@ */
2189   PyType_GenericAlloc,                  /* @tp_alloc@ */
2190   abstract_pynew,                       /* @tp_new@ */
2191   0,                                    /* @tp_free@ */
2192   0                                     /* @tp_is_gc@ */
2193 };
2194
2195 /*----- Message authentication --------------------------------------------*/
2196
2197 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2198
2199 typedef struct gcmac_pyobj {
2200   PyHeapTypeObject ty;
2201   gcmac *cm;
2202 } gcmac_pyobj;
2203
2204 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2205 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2206 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2207 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2208 static PyObject *gmac_pywrap(PyObject *, gmac *);
2209
2210 typedef struct gmac_pyobj {
2211   PyHeapTypeObject ty;
2212   gmac *m;
2213 } gmac_pyobj;
2214
2215 extern PyTypeObject *gmac_pytype;
2216 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2217 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2218 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2219 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2220 extern int convgmac(PyObject *, void *);
2221
2222 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2223 {
2224   static const char *const kwlist[] = { "k", 0 };
2225   struct bin k;
2226
2227   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2228     goto end;
2229   if (keysz(k.sz, GCMAC_CM(ty)->keysz) != k.sz) VALERR("bad key length");
2230   return (gmac_pywrap((PyObject *)ty,
2231                       GM_KEY(GCMAC_CM(ty), k.p, k.sz)));
2232 end:
2233   return (0);
2234 }
2235
2236 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2237 {
2238   static const char *const kwlist[] = { 0 };
2239   ghash_pyobj *g;
2240
2241   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2242   g = PyObject_NEW(ghash_pyobj, ty);
2243   g->h = GM_INIT(GMAC_M(ty));
2244   Py_INCREF(ty);
2245   return ((PyObject *)g);
2246 }
2247
2248 static PyObject *gcmac_pywrap(gcmac *cm)
2249 {
2250   gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2251   g->cm = cm;
2252   g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2253   g->ty.ht_type.tp_base = gmac_pytype;
2254   Py_INCREF(gmac_pytype);
2255   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2256                             Py_TPFLAGS_BASETYPE |
2257                             Py_TPFLAGS_HEAPTYPE);
2258   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2259   g->ty.ht_type.tp_free = 0;
2260   g->ty.ht_type.tp_new = gmac_pynew;
2261   typeready(&g->ty.ht_type);
2262   return ((PyObject *)g);
2263 }
2264
2265 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2266 {
2267   gmac_pyobj *g;
2268   if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2269   else Py_INCREF(cobj);
2270   g = newtype((PyTypeObject *)cobj, 0, 0);
2271   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2272   g->ty.ht_name = TEXT_FORMAT("%s(keyed)", m->ops->c->name);
2273   g->ty.ht_type.tp_name = TEXT_PTR(g->ty.ht_name);
2274   g->ty.ht_type.tp_base = gmhash_pytype;
2275   Py_INCREF(gmac_pytype);
2276   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2277                             Py_TPFLAGS_BASETYPE |
2278                             Py_TPFLAGS_HEAPTYPE);
2279   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2280   g->ty.ht_type.tp_free = 0;
2281   g->ty.ht_type.tp_new = gmhash_pynew;
2282   typeready(&g->ty.ht_type);
2283   g->m = m;
2284   return ((PyObject *)g);
2285 }
2286
2287 static void gmac_pydealloc(PyObject *me)
2288 {
2289   GM_DESTROY(GMAC_M(me));
2290   Py_DECREF(Py_TYPE(me));
2291   PyType_Type.tp_dealloc(me);
2292 }
2293
2294 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2295   { return (TEXT_FROMSTR(GCMAC_CM(me)->name)); }
2296
2297 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2298   { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2299
2300 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2301   { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2302
2303 static const PyGetSetDef gcmac_pygetset[] = {
2304 #define GETSETNAME(op, name) gcm##op##_##name
2305   GET   (keysz,         "CM.keysz -> acceptable key sizes")
2306   GET   (tagsz,         "CM.tagsz -> MAC output size")
2307   GET   (name,          "CM.name -> name of this kind of MAC")
2308 #undef GETSETNAME
2309   { 0 }
2310 };
2311
2312 static PyObject *gmget_name(PyObject *me, void *hunoz)
2313   { return (TEXT_FROMSTR(GMAC_M(me)->ops->c->name)); }
2314
2315 static PyObject *gmget_hashsz(PyObject *me, void *hunoz)
2316   { return (PyInt_FromLong(GMAC_M(me)->ops->c->hashsz)); }
2317 #define gmget_tagsz gmget_hashsz
2318
2319 static const PyGetSetDef gmac_pygetset[] = {
2320 #define GETSETNAME(op, name) gm##op##_##name
2321   GET   (hashsz,        "M.hashsz -> MAC output size")
2322   GET   (tagsz,         "M.tagsz -> MAC output size")
2323   GET   (name,          "M.name -> name of this kind of MAC")
2324 #undef GETSETNAME
2325   { 0 }
2326 };
2327
2328 static const PyTypeObject gcmac_pytype_skel = {
2329   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2330   "GCMAC",                              /* @tp_name@ */
2331   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
2332   0,                                    /* @tp_itemsize@ */
2333
2334   0,                                    /* @tp_dealloc@ */
2335   0,                                    /* @tp_print@ */
2336   0,                                    /* @tp_getattr@ */
2337   0,                                    /* @tp_setattr@ */
2338   0,                                    /* @tp_compare@ */
2339   0,                                    /* @tp_repr@ */
2340   0,                                    /* @tp_as_number@ */
2341   0,                                    /* @tp_as_sequence@ */
2342   0,                                    /* @tp_as_mapping@ */
2343   0,                                    /* @tp_hash@ */
2344   0,                                    /* @tp_call@ */
2345   0,                                    /* @tp_str@ */
2346   0,                                    /* @tp_getattro@ */
2347   0,                                    /* @tp_setattro@ */
2348   0,                                    /* @tp_as_buffer@ */
2349   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2350     Py_TPFLAGS_BASETYPE,
2351
2352   /* @tp_doc@ */
2353   "Message authentication code metametaclass.",
2354
2355   0,                                    /* @tp_traverse@ */
2356   0,                                    /* @tp_clear@ */
2357   0,                                    /* @tp_richcompare@ */
2358   0,                                    /* @tp_weaklistoffset@ */
2359   0,                                    /* @tp_iter@ */
2360   0,                                    /* @tp_iternext@ */
2361   0,                                    /* @tp_methods@ */
2362   0,                                    /* @tp_members@ */
2363   PYGETSET(gcmac),                      /* @tp_getset@ */
2364   0,                                    /* @tp_base@ */
2365   0,                                    /* @tp_dict@ */
2366   0,                                    /* @tp_descr_get@ */
2367   0,                                    /* @tp_descr_set@ */
2368   0,                                    /* @tp_dictoffset@ */
2369   0,                                    /* @tp_init@ */
2370   PyType_GenericAlloc,                  /* @tp_alloc@ */
2371   abstract_pynew,                       /* @tp_new@ */
2372   0,                                    /* @tp_free@ */
2373   0                                     /* @tp_is_gc@ */
2374 };
2375
2376 static const PyTypeObject gmac_pytype_skel = {
2377   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2378   "GMAC",                               /* @tp_name@ */
2379   sizeof(gmac_pyobj),                   /* @tp_basicsize@ */
2380   0,                                    /* @tp_itemsize@ */
2381
2382   gmac_pydealloc,                       /* @tp_dealloc@ */
2383   0,                                    /* @tp_print@ */
2384   0,                                    /* @tp_getattr@ */
2385   0,                                    /* @tp_setattr@ */
2386   0,                                    /* @tp_compare@ */
2387   0,                                    /* @tp_repr@ */
2388   0,                                    /* @tp_as_number@ */
2389   0,                                    /* @tp_as_sequence@ */
2390   0,                                    /* @tp_as_mapping@ */
2391   0,                                    /* @tp_hash@ */
2392   0,                                    /* @tp_call@ */
2393   0,                                    /* @tp_str@ */
2394   0,                                    /* @tp_getattro@ */
2395   0,                                    /* @tp_setattro@ */
2396   0,                                    /* @tp_as_buffer@ */
2397   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2398     Py_TPFLAGS_BASETYPE,
2399
2400   /* @tp_doc@ */
2401   "Message authentication code metaclass, abstract base class.",
2402
2403   0,                                    /* @tp_traverse@ */
2404   0,                                    /* @tp_clear@ */
2405   0,                                    /* @tp_richcompare@ */
2406   0,                                    /* @tp_weaklistoffset@ */
2407   0,                                    /* @tp_iter@ */
2408   0,                                    /* @tp_iternext@ */
2409   0,                                    /* @tp_methods@ */
2410   0,                                    /* @tp_members@ */
2411   PYGETSET(gmac),                       /* @tp_getset@ */
2412   0,                                    /* @tp_base@ */
2413   0,                                    /* @tp_dict@ */
2414   0,                                    /* @tp_descr_get@ */
2415   0,                                    /* @tp_descr_set@ */
2416   0,                                    /* @tp_dictoffset@ */
2417   0,                                    /* @tp_init@ */
2418   PyType_GenericAlloc,                  /* @tp_alloc@ */
2419   abstract_pynew,                       /* @tp_new@ */
2420   0,                                    /* @tp_free@ */
2421   0                                     /* @tp_is_gc@ */
2422 };
2423
2424 static const PyTypeObject gmhash_pytype_skel = {
2425   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2426   "GMACHash",                           /* @tp_name@ */
2427   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
2428   0,                                    /* @tp_itemsize@ */
2429
2430   ghash_pydealloc,                      /* @tp_dealloc@ */
2431   0,                                    /* @tp_print@ */
2432   0,                                    /* @tp_getattr@ */
2433   0,                                    /* @tp_setattr@ */
2434   0,                                    /* @tp_compare@ */
2435   0,                                    /* @tp_repr@ */
2436   0,                                    /* @tp_as_number@ */
2437   0,                                    /* @tp_as_sequence@ */
2438   0,                                    /* @tp_as_mapping@ */
2439   0,                                    /* @tp_hash@ */
2440   0,                                    /* @tp_call@ */
2441   0,                                    /* @tp_str@ */
2442   0,                                    /* @tp_getattro@ */
2443   0,                                    /* @tp_setattro@ */
2444   0,                                    /* @tp_as_buffer@ */
2445   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2446     Py_TPFLAGS_BASETYPE,
2447
2448   /* @tp_doc@ */
2449   "Message authentication code, abstract base class.",
2450
2451   0,                                    /* @tp_traverse@ */
2452   0,                                    /* @tp_clear@ */
2453   0,                                    /* @tp_richcompare@ */
2454   0,                                    /* @tp_weaklistoffset@ */
2455   0,                                    /* @tp_iter@ */
2456   0,                                    /* @tp_iternext@ */
2457   0,                                    /* @tp_methods@ */
2458   0,                                    /* @tp_members@ */
2459   0,                                    /* @tp_getset@ */
2460   0,                                    /* @tp_base@ */
2461   0,                                    /* @tp_dict@ */
2462   0,                                    /* @tp_descr_get@ */
2463   0,                                    /* @tp_descr_set@ */
2464   0,                                    /* @tp_dictoffset@ */
2465   0,                                    /* @tp_init@ */
2466   PyType_GenericAlloc,                  /* @tp_alloc@ */
2467   abstract_pynew,                       /* @tp_new@ */
2468   0,                                    /* @tp_free@ */
2469   0                                     /* @tp_is_gc@ */
2470 };
2471
2472 /*----- Special snowflake for Poly1305 ------------------------------------*/
2473
2474 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2475
2476 typedef struct poly1305key_pyobj {
2477   PyHeapTypeObject ty;
2478   poly1305_key k;
2479 } poly1305key_pyobj;
2480
2481 typedef struct poly1305hash_pyobj {
2482   PyObject_HEAD
2483   unsigned f;
2484 #define f_mask 1u
2485   poly1305_ctx ctx;
2486 } poly1305hash_pyobj;
2487
2488 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2489 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2490 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2491
2492 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2493                                     PyObject *arg, PyObject *kw)
2494 {
2495   static const char *const kwlist[] = { "mask", 0 };
2496   poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2497   poly1305hash_pyobj *ph;
2498   struct bin m = { 0, 0 };
2499
2500   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convbin, &m))
2501     return (0);
2502   if (m.p && m.sz != POLY1305_MASKSZ) VALERR("bad mask length");
2503   ph = PyObject_NEW(poly1305hash_pyobj, ty);
2504   ph->f = 0;
2505   if (m.p) ph->f |= f_mask;
2506   poly1305_macinit(&ph->ctx, &pk->k, m.p);
2507   Py_INCREF(ty);
2508   return ((PyObject *)ph);
2509 end:
2510   return (0);
2511 }
2512
2513 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2514                                    PyObject *arg, PyObject *kw)
2515 {
2516   static const char *const kwlist[] = { "k", 0 };
2517   poly1305key_pyobj *pk;
2518   struct bin k;
2519
2520   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2521     goto end;
2522   if (keysz(k.sz, poly1305_keysz) != k.sz) VALERR("bad key length");
2523
2524   pk = newtype(ty, 0, 0);
2525   pk->ty.ht_name = TEXT_FROMSTR("poly1305(keyed)");
2526   pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2527   pk->ty.ht_type.tp_name = TEXT_PTR(pk->ty.ht_name);
2528   pk->ty.ht_type.tp_base = poly1305hash_pytype;
2529   Py_INCREF(poly1305key_pytype);
2530   pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2531                              Py_TPFLAGS_BASETYPE |
2532                              Py_TPFLAGS_HEAPTYPE);
2533   pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2534   pk->ty.ht_type.tp_free = 0;
2535   pk->ty.ht_type.tp_new = poly1305hash_pynew;
2536   typeready(&pk->ty.ht_type);
2537
2538   poly1305_keyinit(&pk->k, k.p, k.sz);
2539   return ((PyObject *)pk);
2540
2541 end:
2542   return (0);
2543 }
2544
2545 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2546   { return (TEXT_FROMSTR("poly1305")); }
2547
2548 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2549   { return (keysz_pywrap(poly1305_keysz)); }
2550
2551 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2552   { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2553
2554 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2555   { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2556
2557 static PyObject *polymeth_copy(PyObject *me)
2558 {
2559   poly1305hash_pyobj *ph;
2560   ph = PyObject_NEW(poly1305hash_pyobj, Py_TYPE(me));
2561   poly1305_copy(&ph->ctx, P1305_CTX(me));
2562   Py_INCREF(Py_TYPE(me));
2563   return ((PyObject *)ph);
2564 }
2565
2566 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2567 {
2568   struct bin m;
2569   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2570   poly1305_hash(P1305_CTX(me), m.p, m.sz);
2571   RETURN_ME;
2572 }
2573
2574 #define POLYMETH_HASHU_(n, W, w)                                        \
2575   static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg)       \
2576   {                                                                     \
2577     uint##n x;                                                          \
2578     octet b[SZ_##W];                                                    \
2579     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2580     STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b));         \
2581     RETURN_ME;                                                          \
2582   }
2583 DOUINTCONV(POLYMETH_HASHU_)
2584
2585 #define POLYMETH_HASHBUF_(n, W, w)                                      \
2586   static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg)     \
2587   {                                                                     \
2588     struct bin in;                                                      \
2589     octet b[SZ_##W];                                                    \
2590     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2591     if (in.sz > MASK##n) VALERR("too large");                           \
2592     STORE##W(b, in.sz); poly1305_hash(P1305_CTX(me), b, sizeof(b));     \
2593     poly1305_hash(P1305_CTX(me), in.p, in.sz);                          \
2594     RETURN_ME;                                                          \
2595   end:                                                                  \
2596     return (0);                                                         \
2597   }
2598 DOUINTCONV(POLYMETH_HASHBUF_)
2599
2600 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2601 {
2602   char *p;
2603   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2604   poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2605   RETURN_ME;
2606 }
2607
2608 static PyObject *polymeth_flush(PyObject *me)
2609   { poly1305_flush(P1305_CTX(me)); RETURN_ME; }
2610
2611 static PyObject *polymeth_flushzero(PyObject *me)
2612   { poly1305_flushzero(P1305_CTX(me)); RETURN_ME; }
2613
2614 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2615 {
2616   PyObject *pre, *suff;
2617   if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2618   if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2619       !PyObject_TypeCheck(suff, poly1305hash_pytype))
2620     TYERR("wanted a poly1305hash");
2621   if (Py_TYPE(me) != Py_TYPE(pre) || Py_TYPE(me) != Py_TYPE(suff))
2622     TYERR("key mismatch");
2623   if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2624   poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2625   RETURN_ME;
2626 end:
2627   return (0);
2628 }
2629
2630 static PyObject *polymeth_done(PyObject *me)
2631 {
2632   PyObject *rc;
2633   if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2634   rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2635   poly1305_done(P1305_CTX(me), BIN_PTR(rc));
2636   return (rc);
2637 end:
2638   return (0);
2639 }
2640
2641 static const PyGetSetDef poly1305cls_pygetset[] = {
2642 #define GETSETNAME(op, name) poly1305cls##op##_##name
2643   GET   (keysz,         "PC.keysz -> acceptable key sizes")
2644   GET   (masksz,        "PC.masksz -> mask size")
2645   GET   (tagsz,         "PC.tagsz -> MAC output size")
2646   GET   (name,          "PC.name -> name of this kind of MAC")
2647 #undef GETSETNAME
2648   { 0 }
2649 };
2650
2651 static PyObject *poly1305get_name(PyObject *me, void *hunoz)
2652   { RETURN_OBJ(((PyHeapTypeObject *)poly1305key_pytype)->ht_name); }
2653
2654 static PyObject *poly1305get_tagsz(PyObject *me, void *hunoz)
2655   { return (PyInt_FromLong(16)); }
2656
2657 static const PyGetSetDef poly1305_pygetset[] = {
2658 #define GETSETNAME(op, name) poly1305##op##_##name
2659   GET   (tagsz,         "PK.tagsz -> MAC output size")
2660   GET   (name,          "PK.name -> name of this kind of MAC")
2661 #undef GETSETNAME
2662   { 0 }
2663 };
2664
2665 static const PyMethodDef poly1305hash_pymethods[] = {
2666 #define METHNAME(name) polymeth_##name
2667   NAMETH(copy,          "P.copy() -> PP")
2668   METH  (hash,          "P.hash(M)")
2669 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2670   DOUINTCONV(METHU_)
2671 #undef METHU_
2672 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2673   DOUINTCONV(METHBUF_)
2674 #undef METHBUF_
2675   METH  (hashstrz,      "P.hashstrz(STRING)")
2676   NAMETH(flush,         "P.flush()")
2677   NAMETH(flushzero,     "P.flushzero()")
2678   METH  (concat,        "P.concat(PREFIX, SUFFIX)")
2679   NAMETH(done,          "P.done() -> TAG")
2680 #undef METHNAME
2681   { 0 }
2682 };
2683
2684 static const PyTypeObject poly1305cls_pytype_skel = {
2685   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2686   "_Poly1305Class",                     /* @tp_name@ */
2687   sizeof(PyHeapTypeObject),             /* @tp_basicsize@ */
2688   0,                                    /* @tp_itemsize@ */
2689
2690   0,                                    /* @tp_dealloc@ */
2691   0,                                    /* @tp_print@ */
2692   0,                                    /* @tp_getattr@ */
2693   0,                                    /* @tp_setattr@ */
2694   0,                                    /* @tp_compare@ */
2695   0,                                    /* @tp_repr@ */
2696   0,                                    /* @tp_as_number@ */
2697   0,                                    /* @tp_as_sequence@ */
2698   0,                                    /* @tp_as_mapping@ */
2699   0,                                    /* @tp_hash@ */
2700   0,                                    /* @tp_call@ */
2701   0,                                    /* @tp_str@ */
2702   0,                                    /* @tp_getattro@ */
2703   0,                                    /* @tp_setattro@ */
2704   0,                                    /* @tp_as_buffer@ */
2705   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2706     Py_TPFLAGS_BASETYPE,
2707
2708   /* @tp_doc@ */
2709   "Poly1305 metametaclass.  Best not to ask.",
2710
2711   0,                                    /* @tp_traverse@ */
2712   0,                                    /* @tp_clear@ */
2713   0,                                    /* @tp_richcompare@ */
2714   0,                                    /* @tp_weaklistoffset@ */
2715   0,                                    /* @tp_iter@ */
2716   0,                                    /* @tp_iternext@ */
2717   0,                                    /* @tp_methods@ */
2718   0,                                    /* @tp_members@ */
2719   PYGETSET(poly1305cls),                /* @tp_getset@ */
2720   0,                                    /* @tp_base@ */
2721   0,                                    /* @tp_dict@ */
2722   0,                                    /* @tp_descr_get@ */
2723   0,                                    /* @tp_descr_set@ */
2724   0,                                    /* @tp_dictoffset@ */
2725   0,                                    /* @tp_init@ */
2726   PyType_GenericAlloc,                  /* @tp_alloc@ */
2727   abstract_pynew,                       /* @tp_new@ */
2728   0,                                    /* @tp_free@ */
2729   0                                     /* @tp_is_gc@ */
2730 };
2731
2732 static const PyTypeObject poly1305key_pytype_skel = {
2733   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2734   "poly1305",                           /* @tp_name@ */
2735   sizeof(poly1305key_pyobj),            /* @tp_basicsize@ */
2736   0,                                    /* @tp_itemsize@ */
2737
2738   0,                                    /* @tp_dealloc@ */
2739   0,                                    /* @tp_print@ */
2740   0,                                    /* @tp_getattr@ */
2741   0,                                    /* @tp_setattr@ */
2742   0,                                    /* @tp_compare@ */
2743   0,                                    /* @tp_repr@ */
2744   0,                                    /* @tp_as_number@ */
2745   0,                                    /* @tp_as_sequence@ */
2746   0,                                    /* @tp_as_mapping@ */
2747   0,                                    /* @tp_hash@ */
2748   0,                                    /* @tp_call@ */
2749   0,                                    /* @tp_str@ */
2750   0,                                    /* @tp_getattro@ */
2751   0,                                    /* @tp_setattro@ */
2752   0,                                    /* @tp_as_buffer@ */
2753   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2754     Py_TPFLAGS_BASETYPE,
2755
2756   /* @tp_doc@ */
2757   "poly1305(K): Poly1305 key.",
2758
2759   0,                                    /* @tp_traverse@ */
2760   0,                                    /* @tp_clear@ */
2761   0,                                    /* @tp_richcompare@ */
2762   0,                                    /* @tp_weaklistoffset@ */
2763   0,                                    /* @tp_iter@ */
2764   0,                                    /* @tp_iternext@ */
2765   0,                                    /* @tp_methods@ */
2766   0,                                    /* @tp_members@ */
2767   PYGETSET(poly1305),                   /* @tp_getset@ */
2768   0,                                    /* @tp_base@ */
2769   0,                                    /* @tp_dict@ */
2770   0,                                    /* @tp_descr_get@ */
2771   0,                                    /* @tp_descr_set@ */
2772   0,                                    /* @tp_dictoffset@ */
2773   0,                                    /* @tp_init@ */
2774   PyType_GenericAlloc,                  /* @tp_alloc@ */
2775   poly1305key_pynew,                    /* @tp_new@ */
2776   0,                                    /* @tp_free@ */
2777   0                                     /* @tp_is_gc@ */
2778 };
2779
2780 static const PyTypeObject poly1305hash_pytype_skel = {
2781   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2782   "Poly1305Hash",                       /* @tp_name@ */
2783   sizeof(poly1305hash_pyobj),           /* @tp_basicsize@ */
2784   0,                                    /* @tp_itemsize@ */
2785
2786   0,                                    /* @tp_dealloc@ */
2787   0,                                    /* @tp_print@ */
2788   0,                                    /* @tp_getattr@ */
2789   0,                                    /* @tp_setattr@ */
2790   0,                                    /* @tp_compare@ */
2791   0,                                    /* @tp_repr@ */
2792   0,                                    /* @tp_as_number@ */
2793   0,                                    /* @tp_as_sequence@ */
2794   0,                                    /* @tp_as_mapping@ */
2795   0,                                    /* @tp_hash@ */
2796   0,                                    /* @tp_call@ */
2797   0,                                    /* @tp_str@ */
2798   0,                                    /* @tp_getattro@ */
2799   0,                                    /* @tp_setattro@ */
2800   0,                                    /* @tp_as_buffer@ */
2801   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
2802     Py_TPFLAGS_BASETYPE,
2803
2804   /* @tp_doc@ */
2805   "Poly1305 MAC context base class.",
2806
2807   0,                                    /* @tp_traverse@ */
2808   0,                                    /* @tp_clear@ */
2809   0,                                    /* @tp_richcompare@ */
2810   0,                                    /* @tp_weaklistoffset@ */
2811   0,                                    /* @tp_iter@ */
2812   0,                                    /* @tp_iternext@ */
2813   PYMETHODS(poly1305hash),              /* @tp_methods@ */
2814   0,                                    /* @tp_members@ */
2815   0,                                    /* @tp_getset@ */
2816   0,                                    /* @tp_base@ */
2817   0,                                    /* @tp_dict@ */
2818   0,                                    /* @tp_descr_get@ */
2819   0,                                    /* @tp_descr_set@ */
2820   0,                                    /* @tp_dictoffset@ */
2821   0,                                    /* @tp_init@ */
2822   PyType_GenericAlloc,                  /* @tp_alloc@ */
2823   abstract_pynew,                       /* @tp_new@ */
2824   0,                                    /* @tp_free@ */
2825   0                                     /* @tp_is_gc@ */
2826 };
2827
2828 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2829
2830 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance)                        \
2831   static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg)     \
2832   {                                                                     \
2833     dance##_ctx dance;                                                  \
2834     struct bin k, n;                                                    \
2835     PyObject *rc;                                                       \
2836     if (!PyArg_ParseTuple(arg, "O&O&:" #hdance "_prf",                  \
2837                           convbin, &k, convbin, &n))                    \
2838       goto end;                                                         \
2839     if (k.sz != keysz(k.sz, dance##_keysz)) VALERR("bad key length");   \
2840     if (n.sz != HDANCE##_INSZ) VALERR("bad input length");              \
2841     rc = bytestring_pywrap(0, HSALSA20_OUTSZ);                          \
2842     dance##_init(&dance, k.p, k.sz, 0);                                 \
2843     hdance##_prf(&dance, n.p, BIN_PTR(rc));                             \
2844     return (rc);                                                        \
2845   end:                                                                  \
2846     return (0);                                                         \
2847   }
2848
2849 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2850 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2851 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2852
2853 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2854 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2855 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2856
2857 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2858
2859 static PyTypeObject *kxvik_pytype;
2860
2861 typedef struct kxvik_pyobj {
2862   PyObject_HEAD
2863   keccak1600_state s;
2864   unsigned n;
2865 } kxvik_pyobj;
2866
2867 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2868 {
2869   unsigned n = 24;
2870   kxvik_pyobj *rc = 0;
2871   static const char *const kwlist[] = { "nround", 0 };
2872   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2873                                    convuint, &n))
2874     goto end;
2875   rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2876   rc->n = n;
2877   keccak1600_init(&rc->s);
2878 end:
2879   return ((PyObject *)rc);
2880 }
2881
2882 static PyObject *kxvikmeth_copy(PyObject *me)
2883 {
2884   kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2885   rc = (kxvik_pyobj *)Py_TYPE(k)->tp_alloc(Py_TYPE(k), 0);
2886   rc->s = k->s; rc->n = k->n;
2887   return ((PyObject *)rc);
2888 }
2889
2890 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2891 {
2892   kxvik_pyobj *k = (kxvik_pyobj *)me;
2893   kludge64 t[25];
2894   const octet *q;
2895   octet buf[8];
2896   unsigned i;
2897   struct bin in;
2898   size_t n;
2899
2900   if (!PyArg_ParseTuple(arg, "O&:mix", convbin, &in)) goto end;
2901   if (in.sz > 200) VALERR("out of range");
2902   q = in.p; n = in.sz;
2903   i = 0;
2904   while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2905   if (n) {
2906     memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2907     LOAD64_L_(t[i], buf); i++;
2908   }
2909   keccak1600_mix(&k->s, t, i);
2910   RETURN_ME;
2911 end:
2912   return (0);
2913 }
2914
2915 static PyObject *kxvikmeth_set(PyObject *me, PyObject *arg)
2916 {
2917   kxvik_pyobj *k = (kxvik_pyobj *)me;
2918   kludge64 t[25];
2919   const octet *q;
2920   unsigned i;
2921   struct bin in;
2922   size_t n;
2923
2924   if (!PyArg_ParseTuple(arg, "O&:set", convbin, &in)) goto end;
2925   if (in.sz > 200) VALERR("out of range");
2926   q = in.p; n = in.sz;
2927   i = 0;
2928   while (n >= 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2929   if (n) VALERR("not 64-bit aligned");
2930   keccak1600_set(&k->s, t, i);
2931   RETURN_ME;
2932 end:
2933   return (0);
2934 }
2935
2936 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2937 {
2938   kxvik_pyobj *k = (kxvik_pyobj *)me;
2939   PyObject *rc = 0;
2940   kludge64 t[25];
2941   octet *q, buf[8];
2942   unsigned i;
2943   unsigned n;
2944
2945   if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2946   if (n > 200) VALERR("out of range");
2947   rc = bytestring_pywrap(0, n);
2948   q = (octet *)BIN_PTR(rc);
2949   keccak1600_extract(&k->s, t, (n + 7)/8);
2950   i = 0;
2951   while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2952   if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2953 end:
2954   return (rc);
2955 }
2956
2957 static PyObject *kxvikmeth_step(PyObject *me)
2958 {
2959   kxvik_pyobj *k = (kxvik_pyobj *)me;
2960   keccak1600_p(&k->s, &k->s, k->n);
2961   RETURN_ME;
2962 }
2963
2964 static const PyMemberDef kxvik_pymembers[] = {
2965 #define MEMBERSTRUCT kxvik_pyobj
2966   MEMRNM(nround, T_UINT, n, 0,      "KECCAC.nround -> number of rounds")
2967 #undef MEMBERSTRUCT
2968   { 0 }
2969 };
2970
2971 static const PyMethodDef kxvik_pymethods[] = {
2972 #define METHNAME(func) kxvikmeth_##func
2973   NAMETH(copy,          "KECCAK.copy() -> KECCAK'")
2974   METH  (mix,           "KECCAK.mix(DATA)")
2975   METH  (set,           "KECCAK.set(DATA)")
2976   METH  (extract,       "KECCAK.extract(NOCTETS)")
2977   NAMETH(step,          "KECCAK.step()")
2978 #undef METHNAME
2979   { 0 }
2980 };
2981
2982 static const PyTypeObject kxvik_pytype_skel = {
2983   PyVarObject_HEAD_INIT(0, 0)           /* Header */
2984   "Keccak1600",                         /* @tp_name@ */
2985   sizeof(kxvik_pyobj),                  /* @tp_basicsize@ */
2986   0,                                    /* @tp_itemsize@ */
2987
2988   0,                                    /* @tp_dealloc@ */
2989   0,                                    /* @tp_print@ */
2990   0,                                    /* @tp_getattr@ */
2991   0,                                    /* @tp_setattr@ */
2992   0,                                    /* @tp_compare@ */
2993   0,                                    /* @tp_repr@ */
2994   0,                                    /* @tp_as_number@ */
2995   0,                                    /* @tp_as_sequence@ */
2996   0,                                    /* @tp_as_mapping@ */
2997   0,                                    /* @tp_hash@ */
2998   0,                                    /* @tp_call@ */
2999   0,                                    /* @tp_str@ */
3000   0,                                    /* @tp_getattro@ */
3001   0,                                    /* @tp_setattro@ */
3002   0,                                    /* @tp_as_buffer@ */
3003   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3004     Py_TPFLAGS_BASETYPE,
3005
3006   /* @tp_doc@ */
3007   "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
3008
3009   0,                                    /* @tp_traverse@ */
3010   0,                                    /* @tp_clear@ */
3011   0,                                    /* @tp_richcompare@ */
3012   0,                                    /* @tp_weaklistoffset@ */
3013   0,                                    /* @tp_iter@ */
3014   0,                                    /* @tp_iternext@ */
3015   PYMETHODS(kxvik),                     /* @tp_methods@ */
3016   PYMEMBERS(kxvik),                     /* @tp_members@ */
3017   0,                                    /* @tp_getset@ */
3018   0,                                    /* @tp_base@ */
3019   0,                                    /* @tp_dict@ */
3020   0,                                    /* @tp_descr_get@ */
3021   0,                                    /* @tp_descr_set@ */
3022   0,                                    /* @tp_dictoffset@ */
3023   0,                                    /* @tp_init@ */
3024   PyType_GenericAlloc,                  /* @tp_alloc@ */
3025   kxvik_pynew,                          /* @tp_new@ */
3026   0,                                    /* @tp_free@ */
3027   0                                     /* @tp_is_gc@ */
3028 };
3029
3030 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
3031
3032 typedef struct shake_pyobj {
3033   PyObject_HEAD
3034   int st;
3035   shake_ctx h;
3036 } shake_pyobj;
3037
3038 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
3039 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
3040
3041 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
3042                                               const void *, size_t,
3043                                               const void *, size_t),
3044                                PyTypeObject *ty,
3045                                PyObject *arg, PyObject *kw)
3046 {
3047   shake_pyobj *rc = 0;
3048   PyObject *pobj = Py_None, *fobj = Py_None;
3049   struct bin p = { 0, 0 }, f = { 0, 0 };
3050   static const char *const kwlist[] = { "perso", "func", 0 };
3051
3052   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &pobj, &fobj))
3053       goto end;
3054   if (pobj != Py_None && !convbin(pobj, &p)) goto end;
3055   if (fobj != Py_None && !convbin(fobj, &f)) goto end;
3056   rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3057   initfn(&rc->h, f.p, f.sz, p.p, p.sz);
3058   rc->st = 0;
3059 end:
3060   return ((PyObject *)rc);
3061 }
3062
3063 static PyObject *shake128_pynew(PyTypeObject *ty,
3064                                 PyObject *arg, PyObject *kw)
3065   { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
3066
3067 static PyObject *shake256_pynew(PyTypeObject *ty,
3068                                 PyObject *arg, PyObject *kw)
3069   { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
3070
3071 static int shake_check(PyObject *me, int st)
3072 {
3073   if (SHAKE_ST(me) != st) VALERR("wrong state");
3074   return (0);
3075 end:
3076   return (-1);
3077 }
3078
3079 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3080 {
3081   struct bin m;
3082   if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
3083   if (shake_check(me, 0)) return (0);
3084   shake_hash(SHAKE_H(me), m.p, m.sz);
3085   RETURN_ME;
3086 }
3087
3088 #define SHAKEMETH_HASHU_(n, W, w)                                       \
3089   static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg)      \
3090   {                                                                     \
3091     uint##n x;                                                          \
3092     octet b[SZ_##W];                                                    \
3093     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3094     if (shake_check(me, 0)) return (0);                                 \
3095     STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b));              \
3096     RETURN_ME;                                                          \
3097   }
3098 DOUINTCONV(SHAKEMETH_HASHU_)
3099
3100 #define SHAKEMETH_HASHBUF_(n, W, w)                                     \
3101   static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg)    \
3102   {                                                                     \
3103     struct bin in;                                                      \
3104     octet b[SZ_##W];                                                    \
3105     if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
3106     if (in.sz > MASK##n) VALERR("too large");                           \
3107     if (shake_check(me, 0)) goto end;                                   \
3108     STORE##W(b, in.sz); shake_hash(SHAKE_H(me), b, sizeof(b));          \
3109     shake_hash(SHAKE_H(me), in.p, in.sz);                               \
3110     RETURN_ME;                                                          \
3111   end:                                                                  \
3112     return (0);                                                         \
3113   }
3114 DOUINTCONV(SHAKEMETH_HASHBUF_)
3115
3116 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3117 {
3118   char *p;
3119   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3120   if (shake_check(me, 0)) return (0);
3121   shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3122   RETURN_ME;
3123 }
3124
3125 static PyObject *shakemeth_xof(PyObject *me)
3126 {
3127   if (shake_check(me, 0)) goto end;
3128   shake_xof(SHAKE_H(me));
3129   SHAKE_ST(me) = 1;
3130   RETURN_ME;
3131 end:
3132   return (0);
3133 }
3134
3135 static PyObject *shakemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
3136 {
3137   PyObject *rc = 0;
3138   size_t n = 100 - SHAKE_H(me)->h.r/2;
3139   static const char *const kwlist[] = { "hsz", 0 };
3140   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:done", KWLIST, convszt, &n))
3141     goto end;
3142   if (shake_check(me, 0)) goto end;
3143   rc = bytestring_pywrap(0, n);
3144   shake_done(SHAKE_H(me), BIN_PTR(rc), n);
3145   SHAKE_ST(me) = -1;
3146 end:
3147   return (rc);
3148 }
3149
3150 static PyObject *shakemeth_copy(PyObject *me)
3151 {
3152   shake_pyobj *rc = 0;
3153
3154   rc = PyObject_NEW(shake_pyobj, Py_TYPE(me));
3155   rc->h = *SHAKE_H(me);
3156   rc->st = SHAKE_ST(me);
3157   return ((PyObject *)rc);
3158 }
3159
3160 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3161 {
3162   PyObject *rc = 0;
3163   size_t sz;
3164
3165   if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3166   if (shake_check(me, 1)) goto end;
3167   rc = bytestring_pywrap(0, sz);
3168   shake_get(SHAKE_H(me), BIN_PTR(rc), sz);
3169 end:
3170   return (rc);
3171 }
3172
3173 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3174 {
3175   PyObject *rc = 0;
3176   struct bin in;
3177
3178   if (!PyArg_ParseTuple(arg, "O&:mask", convbin, &in)) goto end;
3179   if (shake_check(me, 1)) goto end;
3180   rc = bytestring_pywrap(0, in.sz);
3181   shake_mask(SHAKE_H(me), in.p, BIN_PTR(rc), in.sz);
3182 end:
3183   return (rc);
3184 }
3185
3186 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3187 {
3188   int st = SHAKE_ST(me);
3189   return (TEXT_FROMSTR(st == 0 ? "absorb" :
3190                        st == 1 ? "squeeze" : "dead"));
3191 }
3192
3193 static const PyMemberDef shake_pymembers[] = {
3194 #define MEMBERSTRUCT shake_pyobj
3195   MEMRNM(rate,  T_UINT, h.h.r, READONLY, "S.rate -> rate, in bytes")
3196   MEMRNM(buffered, T_UINT, h.h.n, READONLY,
3197                                    "S.buffered -> amount currently buffered")
3198 #undef MEMBERSTRUCT
3199   { 0 }
3200 };
3201
3202 static const PyGetSetDef shake_pygetset[] = {
3203 #define GETSETNAME(op, name) shake##op##_##name
3204   GET   (state,         "S.state -> `absorb', `squeeze', `dead'")
3205 #undef GETSETNAME
3206   { 0 }
3207 };
3208
3209 static const PyMethodDef shake_pymethods[] = {
3210 #define METHNAME(func) shakemeth_##func
3211   NAMETH(copy,          "S.copy() -> SS")
3212   METH  (hash,          "S.hash(M)")
3213 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3214   DOUINTCONV(METHU_)
3215 #undef METHU_
3216 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3217   DOUINTCONV(METHBUF_)
3218 #undef METHBUF_
3219   METH  (hashstrz,      "S.hashstrz(STRING)")
3220   NAMETH(xof,           "S.xof()")
3221   KWMETH(done,          "S.done([hsz = CAP]) -> H")
3222   METH  (get,           "S.get(LEN) -> H")
3223   METH  (mask,          "S.mask(M) -> C")
3224 #undef METHNAME
3225   { 0 }
3226 };
3227
3228 static const PyTypeObject shake_pytype_skel = {
3229   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3230   "Shake",                              /* @tp_name@ */
3231   sizeof(shake_pyobj),                  /* @tp_basicsize@ */
3232   0,                                    /* @tp_itemsize@ */
3233
3234   0,                                    /* @tp_dealloc@ */
3235   0,                                    /* @tp_print@ */
3236   0,                                    /* @tp_getattr@ */
3237   0,                                    /* @tp_setattr@ */
3238   0,                                    /* @tp_compare@ */
3239   0,                                    /* @tp_repr@ */
3240   0,                                    /* @tp_as_number@ */
3241   0,                                    /* @tp_as_sequence@ */
3242   0,                                    /* @tp_as_mapping@ */
3243   0,                                    /* @tp_hash@ */
3244   0,                                    /* @tp_call@ */
3245   0,                                    /* @tp_str@ */
3246   0,                                    /* @tp_getattro@ */
3247   0,                                    /* @tp_setattro@ */
3248   0,                                    /* @tp_as_buffer@ */
3249   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3250     Py_TPFLAGS_BASETYPE,
3251
3252   /* @tp_doc@ */
3253   "SHAKE/cSHAKE/KMAC base class.",
3254
3255   0,                                    /* @tp_traverse@ */
3256   0,                                    /* @tp_clear@ */
3257   0,                                    /* @tp_richcompare@ */
3258   0,                                    /* @tp_weaklistoffset@ */
3259   0,                                    /* @tp_iter@ */
3260   0,                                    /* @tp_iternext@ */
3261   PYMETHODS(shake),                     /* @tp_methods@ */
3262   PYMEMBERS(shake),                     /* @tp_members@ */
3263   PYGETSET(shake),                      /* @tp_getset@ */
3264   0,                                    /* @tp_base@ */
3265   0,                                    /* @tp_dict@ */
3266   0,                                    /* @tp_descr_get@ */
3267   0,                                    /* @tp_descr_set@ */
3268   0,                                    /* @tp_dictoffset@ */
3269   0,                                    /* @tp_init@ */
3270   PyType_GenericAlloc,                  /* @tp_alloc@ */
3271   abstract_pynew,                       /* @tp_new@ */
3272   0,                                    /* @tp_free@ */
3273   0                                     /* @tp_is_gc@ */
3274 };
3275
3276 static const PyTypeObject shake128_pytype_skel = {
3277   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3278   "Shake128",                           /* @tp_name@ */
3279   0,                                    /* @tp_basicsize@ */
3280   0,                                    /* @tp_itemsize@ */
3281
3282   0,                                    /* @tp_dealloc@ */
3283   0,                                    /* @tp_print@ */
3284   0,                                    /* @tp_getattr@ */
3285   0,                                    /* @tp_setattr@ */
3286   0,                                    /* @tp_compare@ */
3287   0,                                    /* @tp_repr@ */
3288   0,                                    /* @tp_as_number@ */
3289   0,                                    /* @tp_as_sequence@ */
3290   0,                                    /* @tp_as_mapping@ */
3291   0,                                    /* @tp_hash@ */
3292   0,                                    /* @tp_call@ */
3293   0,                                    /* @tp_str@ */
3294   0,                                    /* @tp_getattro@ */
3295   0,                                    /* @tp_setattro@ */
3296   0,                                    /* @tp_as_buffer@ */
3297   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3298     Py_TPFLAGS_BASETYPE,
3299
3300   /* @tp_doc@ */
3301   "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3302
3303   0,                                    /* @tp_traverse@ */
3304   0,                                    /* @tp_clear@ */
3305   0,                                    /* @tp_richcompare@ */
3306   0,                                    /* @tp_weaklistoffset@ */
3307   0,                                    /* @tp_iter@ */
3308   0,                                    /* @tp_iternext@ */
3309   0,                                    /* @tp_methods@ */
3310   0,                                    /* @tp_members@ */
3311   0,                                    /* @tp_getset@ */
3312   0,                                    /* @tp_base@ */
3313   0,                                    /* @tp_dict@ */
3314   0,                                    /* @tp_descr_get@ */
3315   0,                                    /* @tp_descr_set@ */
3316   0,                                    /* @tp_dictoffset@ */
3317   0,                                    /* @tp_init@ */
3318   PyType_GenericAlloc,                  /* @tp_alloc@ */
3319   shake128_pynew,                       /* @tp_new@ */
3320   0,                                    /* @tp_free@ */
3321   0                                     /* @tp_is_gc@ */
3322 };
3323
3324 static const PyTypeObject shake256_pytype_skel = {
3325   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3326   "Shake256",                           /* @tp_name@ */
3327   0,                                    /* @tp_basicsize@ */
3328   0,                                    /* @tp_itemsize@ */
3329
3330   0,                                    /* @tp_dealloc@ */
3331   0,                                    /* @tp_print@ */
3332   0,                                    /* @tp_getattr@ */
3333   0,                                    /* @tp_setattr@ */
3334   0,                                    /* @tp_compare@ */
3335   0,                                    /* @tp_repr@ */
3336   0,                                    /* @tp_as_number@ */
3337   0,                                    /* @tp_as_sequence@ */
3338   0,                                    /* @tp_as_mapping@ */
3339   0,                                    /* @tp_hash@ */
3340   0,                                    /* @tp_call@ */
3341   0,                                    /* @tp_str@ */
3342   0,                                    /* @tp_getattro@ */
3343   0,                                    /* @tp_setattro@ */
3344   0,                                    /* @tp_as_buffer@ */
3345   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3346     Py_TPFLAGS_BASETYPE,
3347
3348   /* @tp_doc@ */
3349   "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3350
3351   0,                                    /* @tp_traverse@ */
3352   0,                                    /* @tp_clear@ */
3353   0,                                    /* @tp_richcompare@ */
3354   0,                                    /* @tp_weaklistoffset@ */
3355   0,                                    /* @tp_iter@ */
3356   0,                                    /* @tp_iternext@ */
3357   0,                                    /* @tp_methods@ */
3358   0,                                    /* @tp_members@ */
3359   0,                                    /* @tp_getset@ */
3360   0,                                    /* @tp_base@ */
3361   0,                                    /* @tp_dict@ */
3362   0,                                    /* @tp_descr_get@ */
3363   0,                                    /* @tp_descr_set@ */
3364   0,                                    /* @tp_dictoffset@ */
3365   0,                                    /* @tp_init@ */
3366   PyType_GenericAlloc,                  /* @tp_alloc@ */
3367   shake256_pynew,                       /* @tp_new@ */
3368   0,                                    /* @tp_free@ */
3369   0                                     /* @tp_is_gc@ */
3370 };
3371
3372 static PyTypeObject *kmac_pytype, *kmac128_pytype, *kmac256_pytype;
3373
3374 static PyObject *kmac_dopynew(void (*initfn)(shake_ctx *,
3375                                              const void *, size_t,
3376                                              const void *, size_t),
3377                                PyTypeObject *ty,
3378                                PyObject *arg, PyObject *kw)
3379 {
3380   shake_pyobj *rc = 0;
3381   PyObject *pobj = Py_None;
3382   struct bin k = { 0, 0 }, p = { 0, 0 };
3383   static const char *const kwlist[] = { "key", "perso", 0 };
3384
3385   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:new", KWLIST,
3386                                    convbin, &k, &pobj))
3387       goto end;
3388   if (pobj != Py_None && !convbin(pobj, &p)) goto end;
3389   rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3390   initfn(&rc->h, p.p, p.sz, k.p, k.sz);
3391   rc->st = 0;
3392 end:
3393   return ((PyObject *)rc);
3394 }
3395
3396 static PyObject *kmac128_pynew(PyTypeObject *ty,
3397                                PyObject *arg, PyObject *kw)
3398   { return (kmac_dopynew(kmac128_init, ty, arg, kw)); }
3399
3400 static PyObject *kmac256_pynew(PyTypeObject *ty,
3401                                PyObject *arg, PyObject *kw)
3402   { return (kmac_dopynew(kmac256_init, ty, arg, kw)); }
3403
3404 static PyObject *kmacmeth_xof(PyObject *me)
3405 {
3406   if (shake_check(me, 0)) goto end;
3407   kmac_xof(SHAKE_H(me));
3408   SHAKE_ST(me) = 1;
3409   RETURN_ME;
3410 end:
3411   return (0);
3412 }
3413
3414 static PyObject *kmacmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
3415 {
3416   PyObject *rc = 0;
3417   size_t n = 100 - SHAKE_H(me)->h.r/2;
3418   static const char *const kwlist[] = { "hsz", 0 };
3419   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:done", KWLIST, convszt, &n))
3420     goto end;
3421   if (shake_check(me, 0)) goto end;
3422   rc = bytestring_pywrap(0, n);
3423   kmac_done(SHAKE_H(me), BIN_PTR(rc), n);
3424   SHAKE_ST(me) = -1;
3425 end:
3426   return (rc);
3427 }
3428
3429 static const PyMethodDef kmac_pymethods[] = {
3430 #define METHNAME(func) kmacmeth_##func
3431   NAMETH(xof,           "K.xof()")
3432   KWMETH(done,          "K.done([hsz = CAP/2]) -> T")
3433 #undef METHNAME
3434   { 0 }
3435 };
3436
3437 static const PyTypeObject kmac_pytype_skel = {
3438   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3439   "KMAC",                               /* @tp_name@ */
3440   sizeof(shake_pyobj),                  /* @tp_basicsize@ */
3441   0,                                    /* @tp_itemsize@ */
3442
3443   0,                                    /* @tp_dealloc@ */
3444   0,                                    /* @tp_print@ */
3445   0,                                    /* @tp_getattr@ */
3446   0,                                    /* @tp_setattr@ */
3447   0,                                    /* @tp_compare@ */
3448   0,                                    /* @tp_repr@ */
3449   0,                                    /* @tp_as_number@ */
3450   0,                                    /* @tp_as_sequence@ */
3451   0,                                    /* @tp_as_mapping@ */
3452   0,                                    /* @tp_hash@ */
3453   0,                                    /* @tp_call@ */
3454   0,                                    /* @tp_str@ */
3455   0,                                    /* @tp_getattro@ */
3456   0,                                    /* @tp_setattro@ */
3457   0,                                    /* @tp_as_buffer@ */
3458   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3459     Py_TPFLAGS_BASETYPE,
3460
3461   /* @tp_doc@ */
3462   "KMAC base class.",
3463
3464   0,                                    /* @tp_traverse@ */
3465   0,                                    /* @tp_clear@ */
3466   0,                                    /* @tp_richcompare@ */
3467   0,                                    /* @tp_weaklistoffset@ */
3468   0,                                    /* @tp_iter@ */
3469   0,                                    /* @tp_iternext@ */
3470   PYMETHODS(kmac),                      /* @tp_methods@ */
3471   0,                                    /* @tp_members@ */
3472   0,                                    /* @tp_getset@ */
3473   0,                                    /* @tp_base@ */
3474   0,                                    /* @tp_dict@ */
3475   0,                                    /* @tp_descr_get@ */
3476   0,                                    /* @tp_descr_set@ */
3477   0,                                    /* @tp_dictoffset@ */
3478   0,                                    /* @tp_init@ */
3479   PyType_GenericAlloc,                  /* @tp_alloc@ */
3480   abstract_pynew,                       /* @tp_new@ */
3481   0,                                    /* @tp_free@ */
3482   0                                     /* @tp_is_gc@ */
3483 };
3484
3485 static const PyTypeObject kmac128_pytype_skel = {
3486   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3487   "KMAC128",                            /* @tp_name@ */
3488   0,                                    /* @tp_basicsize@ */
3489   0,                                    /* @tp_itemsize@ */
3490
3491   0,                                    /* @tp_dealloc@ */
3492   0,                                    /* @tp_print@ */
3493   0,                                    /* @tp_getattr@ */
3494   0,                                    /* @tp_setattr@ */
3495   0,                                    /* @tp_compare@ */
3496   0,                                    /* @tp_repr@ */
3497   0,                                    /* @tp_as_number@ */
3498   0,                                    /* @tp_as_sequence@ */
3499   0,                                    /* @tp_as_mapping@ */
3500   0,                                    /* @tp_hash@ */
3501   0,                                    /* @tp_call@ */
3502   0,                                    /* @tp_str@ */
3503   0,                                    /* @tp_getattro@ */
3504   0,                                    /* @tp_setattro@ */
3505   0,                                    /* @tp_as_buffer@ */
3506   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3507     Py_TPFLAGS_BASETYPE,
3508
3509   /* @tp_doc@ */
3510   "KMAC128(KEY, [perso = STR]): KMAC XOMAC.",
3511
3512   0,                                    /* @tp_traverse@ */
3513   0,                                    /* @tp_clear@ */
3514   0,                                    /* @tp_richcompare@ */
3515   0,                                    /* @tp_weaklistoffset@ */
3516   0,                                    /* @tp_iter@ */
3517   0,                                    /* @tp_iternext@ */
3518   0,                                    /* @tp_methods@ */
3519   0,                                    /* @tp_members@ */
3520   0,                                    /* @tp_getset@ */
3521   0,                                    /* @tp_base@ */
3522   0,                                    /* @tp_dict@ */
3523   0,                                    /* @tp_descr_get@ */
3524   0,                                    /* @tp_descr_set@ */
3525   0,                                    /* @tp_dictoffset@ */
3526   0,                                    /* @tp_init@ */
3527   PyType_GenericAlloc,                  /* @tp_alloc@ */
3528   kmac128_pynew,                        /* @tp_new@ */
3529   0,                                    /* @tp_free@ */
3530   0                                     /* @tp_is_gc@ */
3531 };
3532
3533 static const PyTypeObject kmac256_pytype_skel = {
3534   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3535   "KMAC256",                            /* @tp_name@ */
3536   0,                                    /* @tp_basicsize@ */
3537   0,                                    /* @tp_itemsize@ */
3538
3539   0,                                    /* @tp_dealloc@ */
3540   0,                                    /* @tp_print@ */
3541   0,                                    /* @tp_getattr@ */
3542   0,                                    /* @tp_setattr@ */
3543   0,                                    /* @tp_compare@ */
3544   0,                                    /* @tp_repr@ */
3545   0,                                    /* @tp_as_number@ */
3546   0,                                    /* @tp_as_sequence@ */
3547   0,                                    /* @tp_as_mapping@ */
3548   0,                                    /* @tp_hash@ */
3549   0,                                    /* @tp_call@ */
3550   0,                                    /* @tp_str@ */
3551   0,                                    /* @tp_getattro@ */
3552   0,                                    /* @tp_setattro@ */
3553   0,                                    /* @tp_as_buffer@ */
3554   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3555     Py_TPFLAGS_BASETYPE,
3556
3557   /* @tp_doc@ */
3558   "KMAC256(KEY, [perso = STR]): KMAC XOMAC.",
3559
3560   0,                                    /* @tp_traverse@ */
3561   0,                                    /* @tp_clear@ */
3562   0,                                    /* @tp_richcompare@ */
3563   0,                                    /* @tp_weaklistoffset@ */
3564   0,                                    /* @tp_iter@ */
3565   0,                                    /* @tp_iternext@ */
3566   0,                                    /* @tp_methods@ */
3567   0,                                    /* @tp_members@ */
3568   0,                                    /* @tp_getset@ */
3569   0,                                    /* @tp_base@ */
3570   0,                                    /* @tp_dict@ */
3571   0,                                    /* @tp_descr_get@ */
3572   0,                                    /* @tp_descr_set@ */
3573   0,                                    /* @tp_dictoffset@ */
3574   0,                                    /* @tp_init@ */
3575   PyType_GenericAlloc,                  /* @tp_alloc@ */
3576   kmac256_pynew,                        /* @tp_new@ */
3577   0,                                    /* @tp_free@ */
3578   0                                     /* @tp_is_gc@ */
3579 };
3580
3581 /*----- Pseudorandom permutations -----------------------------------------*/
3582
3583 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3584
3585 typedef struct prpinfo {
3586   const char *name;
3587   const octet *keysz;
3588   size_t ctxsz;
3589   size_t blksz;
3590   void (*init)(void *, const void *, size_t);
3591   void (*eblk)(void *, const void *, void *);
3592   void (*dblk)(void *, const void *, void *);
3593 } prpinfo;
3594
3595 #define PRP_DEF(PRE, pre)                                               \
3596   static void pre##_prpinit(void *ctx, const void *k, size_t ksz)       \
3597     { pre##_init(ctx, k, ksz); }                                        \
3598   static void pre##_prpeblk(void *ctx, const void *in, void *out)       \
3599   {                                                                     \
3600     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3601     pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3602   }                                                                     \
3603   static void pre##_prpdblk(void *ctx, const void *in, void *out)       \
3604   {                                                                     \
3605     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
3606     pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
3607   }                                                                     \
3608   static const prpinfo pre##_prpinfo = {                                \
3609     #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ,                  \
3610     pre##_prpinit, pre##_prpeblk, pre##_prpdblk                         \
3611   };
3612 PRPS(PRP_DEF)
3613
3614 static const struct prpinfo *const gprptab[] = {
3615 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3616   PRPS(PRP_ENTRY)
3617   0
3618 };
3619
3620 typedef struct gcprp_pyobj {
3621   PyHeapTypeObject ty;
3622   const prpinfo *prp;
3623 } gcprp_pyobj;
3624 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3625
3626 typedef struct gprp_pyobj {
3627   PyObject_HEAD
3628   const prpinfo *prp;
3629 } gprp_pyobj;
3630 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3631 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3632
3633 typedef struct prp {
3634   const prpinfo *prp;
3635   void *ctx;
3636 } prp;
3637
3638 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3639 {
3640   static const char *const kwlist[] = { "key", 0 };
3641   struct bin k;
3642   const prpinfo *prp = GCPRP_PRP(ty);
3643   PyObject *me;
3644
3645   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
3646     goto end;
3647   if (keysz(k.sz, prp->keysz) != k.sz) VALERR("bad key length");
3648   me = (PyObject *)ty->tp_alloc(ty, 0);
3649   GPRP_PRP(me) = prp;
3650   prp->init(GPRP_CTX(me), k.p, k.sz);
3651   RETURN_ME;
3652 end:
3653   return (0);
3654 }
3655
3656 static void gprp_pydealloc(PyObject *me)
3657   { Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
3658
3659 static PyObject *gcprp_pywrap(const prpinfo *prp)
3660 {
3661   gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3662   g->prp = prp;
3663   g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3664   g->ty.ht_type.tp_base = gprp_pytype;
3665   Py_INCREF(gprp_pytype);
3666   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3667                             Py_TPFLAGS_BASETYPE |
3668                             Py_TPFLAGS_HEAPTYPE);
3669   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3670   g->ty.ht_type.tp_free = 0;
3671   g->ty.ht_type.tp_new = gprp_pynew;
3672   typeready(&g->ty.ht_type);
3673   return ((PyObject *)g);
3674 }
3675
3676 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3677   { return (TEXT_FROMSTR(GCPRP_PRP(me)->name)); }
3678 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3679   { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3680 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3681   { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3682
3683 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3684 {
3685   struct bin m;
3686   PyObject *rc = 0;
3687
3688   if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
3689   if (m.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3690   rc = bytestring_pywrap(0, m.sz);
3691   GPRP_PRP(me)->eblk(GPRP_CTX(me), m.p, BIN_PTR(rc));
3692 end:
3693   return (rc);
3694 }
3695
3696 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3697 {
3698   struct bin c;
3699   PyObject *rc = 0;
3700
3701   if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
3702   if (c.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3703   rc = bytestring_pywrap(0, c.sz);
3704   GPRP_PRP(me)->dblk(GPRP_CTX(me), c.p, BIN_PTR(rc));
3705 end:
3706   return (rc);
3707 }
3708
3709 static const PyGetSetDef gcprp_pygetset[] = {
3710 #define GETSETNAME(op, name) gcp##op##_##name
3711   GET   (keysz,         "CP.keysz -> acceptable key sizes")
3712   GET   (blksz,         "CP.blksz -> block size")
3713   GET   (name,          "CP.name -> name of this kind of PRP")
3714 #undef GETSETNAME
3715   { 0 }
3716 };
3717
3718 static const PyMethodDef gprp_pymethods[] = {
3719 #define METHNAME(name) gpmeth_##name
3720   METH  (encrypt,       "P.encrypt(PT) -> CT")
3721   METH  (decrypt,       "P.decrypt(CT) -> PT")
3722 #undef METHNAME
3723   { 0 }
3724 };
3725
3726 static const PyTypeObject gcprp_pytype_skel = {
3727   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3728   "GCPRP",                              /* @tp_name@ */
3729   sizeof(gcprp_pyobj),                  /* @tp_basicsize@ */
3730   0,                                    /* @tp_itemsize@ */
3731
3732   0,                                    /* @tp_dealloc@ */
3733   0,                                    /* @tp_print@ */
3734   0,                                    /* @tp_getattr@ */
3735   0,                                    /* @tp_setattr@ */
3736   0,                                    /* @tp_compare@ */
3737   0,                                    /* @tp_repr@ */
3738   0,                                    /* @tp_as_number@ */
3739   0,                                    /* @tp_as_sequence@ */
3740   0,                                    /* @tp_as_mapping@ */
3741   0,                                    /* @tp_hash@ */
3742   0,                                    /* @tp_call@ */
3743   0,                                    /* @tp_str@ */
3744   0,                                    /* @tp_getattro@ */
3745   0,                                    /* @tp_setattro@ */
3746   0,                                    /* @tp_as_buffer@ */
3747   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3748     Py_TPFLAGS_BASETYPE,
3749
3750   /* @tp_doc@ */
3751   "Pseudorandom permutation metaclass.",
3752
3753   0,                                    /* @tp_traverse@ */
3754   0,                                    /* @tp_clear@ */
3755   0,                                    /* @tp_richcompare@ */
3756   0,                                    /* @tp_weaklistoffset@ */
3757   0,                                    /* @tp_iter@ */
3758   0,                                    /* @tp_iternext@ */
3759   0,                                    /* @tp_methods@ */
3760   0,                                    /* @tp_members@ */
3761   PYGETSET(gcprp),                      /* @tp_getset@ */
3762   0,                                    /* @tp_base@ */
3763   0,                                    /* @tp_dict@ */
3764   0,                                    /* @tp_descr_get@ */
3765   0,                                    /* @tp_descr_set@ */
3766   0,                                    /* @tp_dictoffset@ */
3767   0,                                    /* @tp_init@ */
3768   PyType_GenericAlloc,                  /* @tp_alloc@ */
3769   abstract_pynew,                       /* @tp_new@ */
3770   0,                                    /* @tp_free@ */
3771   0                                     /* @tp_is_gc@ */
3772 };
3773
3774 static const PyTypeObject gprp_pytype_skel = {
3775   PyVarObject_HEAD_INIT(0, 0)           /* Header */
3776   "GPRP",                               /* @tp_name@ */
3777   sizeof(gprp_pyobj),                   /* @tp_basicsize@ */
3778   0,                                    /* @tp_itemsize@ */
3779
3780   gprp_pydealloc,                       /* @tp_dealloc@ */
3781   0,                                    /* @tp_print@ */
3782   0,                                    /* @tp_getattr@ */
3783   0,                                    /* @tp_setattr@ */
3784   0,                                    /* @tp_compare@ */
3785   0,                                    /* @tp_repr@ */
3786   0,                                    /* @tp_as_number@ */
3787   0,                                    /* @tp_as_sequence@ */
3788   0,                                    /* @tp_as_mapping@ */
3789   0,                                    /* @tp_hash@ */
3790   0,                                    /* @tp_call@ */
3791   0,                                    /* @tp_str@ */
3792   0,                                    /* @tp_getattro@ */
3793   0,                                    /* @tp_setattro@ */
3794   0,                                    /* @tp_as_buffer@ */
3795   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
3796     Py_TPFLAGS_BASETYPE,
3797
3798   /* @tp_doc@ */
3799   "Pseudorandom permutation, abstract base class.",
3800
3801   0,                                    /* @tp_traverse@ */
3802   0,                                    /* @tp_clear@ */
3803   0,                                    /* @tp_richcompare@ */
3804   0,                                    /* @tp_weaklistoffset@ */
3805   0,                                    /* @tp_iter@ */
3806   0,                                    /* @tp_iternext@ */
3807   PYMETHODS(gprp),                      /* @tp_methods@ */
3808   0,                                    /* @tp_members@ */
3809   0,                                    /* @tp_getset@ */
3810   0,                                    /* @tp_base@ */
3811   0,                                    /* @tp_dict@ */
3812   0,                                    /* @tp_descr_get@ */
3813   0,                                    /* @tp_descr_set@ */
3814   0,                                    /* @tp_dictoffset@ */
3815   0,                                    /* @tp_init@ */
3816   PyType_GenericAlloc,                  /* @tp_alloc@ */
3817   abstract_pynew,                       /* @tp_new@ */
3818   0,                                    /* @tp_free@ */
3819   0                                     /* @tp_is_gc@ */
3820 };
3821
3822 /*----- Main code ---------------------------------------------------------*/
3823
3824 static const struct nameval consts[] = {
3825   CONST(AEADF_PCHSZ), CONST(AEADF_PCMSZ), CONST(AEADF_PCTSZ),
3826   CONST(AEADF_AADNDEP), CONST(AEADF_AADFIRST), CONST(AEADF_NOAAD),
3827   { 0 }
3828 };
3829
3830 static const PyMethodDef methods[] = {
3831 #define METHNAME(func) meth_##func
3832 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf,                  \
3833          "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3834   METH_HDANCE(hsalsa20, "HSalsa20")
3835   METH_HDANCE(hsalsa2012, "HSalsa20/12")
3836   METH_HDANCE(hsalsa208, "HSalsa20/8")
3837   METH_HDANCE(hchacha20, "HChaCha20")
3838   METH_HDANCE(hchacha12, "HChaCha12")
3839   METH_HDANCE(hchacha8, "HChaCha8")
3840 #undef METH_DANCE
3841 #undef METHNAME
3842   { 0 }
3843 };
3844
3845 void algorithms_pyinit(void)
3846 {
3847   INITTYPE(keysz, root);
3848   INITTYPE(keyszany, keysz);
3849   INITTYPE(keyszrange, keysz);
3850   INITTYPE(keyszset, keysz);
3851   INITTYPE(gccipher, type);
3852   INITTYPE(gcipher, root);
3853   INITTYPE(gcaead, type);
3854   INITTYPE(gaeadkey, root);
3855   INITTYPE(gcaeadaad, type);
3856   INITTYPE(gaeadaad, root);
3857   INITTYPE(gcaeadenc, type);
3858   INITTYPE(gaeadenc, root);
3859   INITTYPE(gcaeaddec, type);
3860   INITTYPE(gaeaddec, root);
3861   INITTYPE(gchash, type);
3862   INITTYPE(ghash, root);
3863   INITTYPE(gcmac, type);
3864   INITTYPE(gmac, type);
3865   INITTYPE(gmhash, ghash);
3866   INITTYPE(poly1305cls, type);
3867   INITTYPE_META(poly1305key, type, poly1305cls);
3868   INITTYPE(poly1305hash, root);
3869   INITTYPE(kxvik, root);
3870   INITTYPE(shake, root);
3871   INITTYPE(shake128, shake);
3872   INITTYPE(shake256, shake);
3873   INITTYPE(kmac, shake);
3874   INITTYPE(kmac128, kmac);
3875   INITTYPE(kmac256, kmac);
3876   INITTYPE(gcprp, type);
3877   INITTYPE(gprp, root);
3878   addmethods(methods);
3879 }
3880
3881 #define gcprp prpinfo
3882 #define CLASS_TABLES(_) _(cipher) _(aead) _(hash) _(mac) _(prp)
3883 #define TABLE_FNS(pre)                                                  \
3884   static const char *pre##_namefn(const void *p)                        \
3885     { const gc##pre *const *cls = p; return (*cls ? (*cls)->name : 0); } \
3886   static PyObject *pre##_valfn(const void *p)                           \
3887     { gc##pre *const*cls = p; return (gc##pre##_pywrap(*cls)); }
3888 CLASS_TABLES(TABLE_FNS)
3889
3890 void algorithms_pyinsert(PyObject *mod)
3891 {
3892   PyObject *d;
3893   INSERT("KeySZ", keysz_pytype);
3894   INSERT("KeySZAny", keyszany_pytype);
3895   INSERT("KeySZRange", keyszrange_pytype);
3896   INSERT("KeySZSet", keyszset_pytype);
3897   INSERT("GCCipher", gccipher_pytype);
3898   INSERT("GCipher", gcipher_pytype);
3899   INSERT("gcciphers", make_algtab(gciphertab, sizeof(gccipher *),
3900                                   cipher_namefn, cipher_valfn));
3901   INSERT("GCAEAD", gcaead_pytype);
3902   INSERT("GAEKey", gaeadkey_pytype);
3903   INSERT("GAEAADClass", gcaeadaad_pytype);
3904   INSERT("GAEAAD", gaeadaad_pytype);
3905   INSERT("GAEEncClass", gcaeadenc_pytype);
3906   INSERT("GAEEnc", gaeadenc_pytype);
3907   INSERT("GAEDecClass", gcaeaddec_pytype);
3908   INSERT("GAEDec", gaeaddec_pytype);
3909   INSERT("gcaeads", make_algtab(gaeadtab, sizeof(gcaead *),
3910                                 aead_namefn, aead_valfn));
3911   INSERT("GCHash", gchash_pytype);
3912   INSERT("GHash", ghash_pytype);
3913   d = make_algtab(ghashtab, sizeof(gchash *), hash_namefn, hash_valfn);
3914   INSERT("gchashes", d);
3915   sha_pyobj = PyMapping_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3916   has160_pyobj = PyMapping_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3917   INSERT("GCMAC", gcmac_pytype);
3918   INSERT("GMAC", gmac_pytype);
3919   INSERT("GMACHash", gmhash_pytype);
3920   INSERT("gcmacs", make_algtab(gmactab, sizeof(gcmac *),
3921                                mac_namefn, mac_valfn));
3922   INSERT("_Poly1305Class", poly1305cls_pytype);
3923   INSERT("poly1305", poly1305key_pytype);
3924   INSERT("Poly1305Hash", poly1305hash_pytype);
3925   INSERT("Keccak1600", kxvik_pytype);
3926   INSERT("Shake", shake_pytype);
3927   INSERT("Shake128", shake128_pytype);
3928   INSERT("Shake256", shake256_pytype);
3929   INSERT("KMAC", kmac_pytype);
3930   INSERT("KMAC128", kmac128_pytype);
3931   INSERT("KMAC256", kmac256_pytype);
3932   INSERT("GCPRP", gcprp_pytype);
3933   INSERT("GPRP", gprp_pytype);
3934   INSERT("gcprps", make_algtab(gprptab, sizeof(gcprp *),
3935                                prp_namefn, prp_valfn));
3936   setconstants(mod, consts);
3937 }
3938
3939 /*----- That's all, folks -------------------------------------------------*/