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

   1 /* -*-c-*-
   2  *
   3  * Symmetric cryptography
   4  *
   5  * (c) 2004 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Python interface to Catacomb.
  11  *
  12  * Catacomb/Python is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Catacomb/Python is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include "catacomb-python.h"
  30 #include "algorithms.h"
  31
  32 /*----- Key sizes ---------------------------------------------------------*/
  33
  34 PyTypeObject *keysz_pytype;
  35 PyTypeObject *keyszany_pytype, *keyszrange_pytype, *keyszset_pytype;
  36 PyObject *sha_pyobj, *has160_pyobj;
  37
  38 PyObject *keysz_pywrap(const octet *k)
  39 {
  40   switch (k[0]) {
  41     case KSZ_ANY: {
  42       keysz_pyobj *o = PyObject_New(keysz_pyobj, keyszany_pytype);
  43       o->dfl = k[1];
  44       return ((PyObject *)o);
  45     } break;
  46     case KSZ_RANGE: {
  47       keyszrange_pyobj *o =
  48         PyObject_New(keyszrange_pyobj, keyszrange_pytype);
  49       o->dfl = k[1];
  50       o->min = k[2];
  51       o->max = k[3];
  52       o->mod = k[4];
  53       if (!o->mod) o->mod = 1;
  54       return ((PyObject *)o);
  55     } break;
  56     case KSZ_SET: {
  57       keyszset_pyobj *o =
  58         PyObject_New(keyszset_pyobj, keyszset_pytype);
  59       int i, n;
  60       o->dfl = k[1];
  61       for (i = 0; k[i + 1]; i++) ;
  62       n = i; o->set = PyTuple_New(n);
  63       for (i = 0; i < n; i++)
  64         PyTuple_SET_ITEM(o->set, i, PyInt_FromLong(k[i + 1]));
  65       return ((PyObject *)o);
  66     } break;
  67     default:
  68       abort();
  69   }
  70 }
  71
  72 static PyObject *keyszany_pynew(PyTypeObject *ty,
  73                                 PyObject *arg, PyObject *kw)
  74 {
  75   char *kwlist[] = { "default", 0 };
  76   int dfl;
  77   keysz_pyobj *o;
  78
  79   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", kwlist, &dfl))
  80     goto end;
  81   if (dfl < 0) VALERR("key size cannot be negative");
  82   o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
  83   o->dfl = dfl;
  84   return ((PyObject *)o);
  85 end:
  86   return (0);
  87 }
  88
  89 static PyObject *keyszrange_pynew(PyTypeObject *ty,
  90                                   PyObject *arg, PyObject *kw)
  91 {
  92   char *kwlist[] = { "default", "min", "max", "mod", 0 };
  93   int dfl, min = 0, max = 0, mod = 1;
  94   keyszrange_pyobj *o;
  95
  96   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iii:new", kwlist,
  97                                    &dfl, &min, &max, &mod))
  98     goto end;
  99   if (dfl < 0 || min < 0 || max < 0)
 100     VALERR("key size cannot be negative");
 101   if (min > dfl || (max && dfl > max))
 102     VALERR("bad key size bounds");
 103   if (mod <= 0 || dfl % mod || min % mod || max % mod)
 104     VALERR("bad key size modulus");
 105   o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
 106   o->dfl = dfl;
 107   o->min = min;
 108   o->max = max;
 109   o->mod = mod;
 110   return ((PyObject *)o);
 111 end:
 112   return (0);
 113 }
 114
 115 static PyObject *keyszset_pynew(PyTypeObject *ty,
 116                                 PyObject *arg, PyObject *kw)
 117 {
 118   char *kwlist[] = { "default", "set", 0 };
 119   int dfl, i, n, xx;
 120   PyObject *set = 0;
 121   PyObject *x = 0, *l = 0;
 122   keyszset_pyobj *o = 0;
 123
 124   if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", kwlist,
 125                                           &dfl, &set))
 126     goto end;
 127   if (!set) set = PyTuple_New(0);
 128   else Py_INCREF(set);
 129   if (!PySequence_Check(set)) TYERR("want a sequence");
 130   n = PySequence_Size(set);
 131   l = PyList_New(0);
 132   if (PyErr_Occurred()) goto end;
 133   if (dfl < 0) VALERR("key size cannot be negative");
 134   x = PyInt_FromLong(dfl);
 135   PyList_Append(l, x);
 136   Py_DECREF(x);
 137   x = 0;
 138   for (i = 0; i < n; i++) {
 139     if ((x = PySequence_GetItem(set, i)) == 0) goto end;
 140     xx = PyInt_AsLong(x);
 141     if (PyErr_Occurred()) goto end;
 142     if (xx == dfl) continue;
 143     if (xx < 0) VALERR("key size cannot be negative");
 144     PyList_Append(l, x);
 145     Py_DECREF(x);
 146     x = 0;
 147   }
 148   Py_DECREF(set);
 149   if ((set = PySequence_Tuple(l)) == 0) goto end;
 150   o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
 151   o->dfl = dfl;
 152   o->set = set;
 153   Py_INCREF(set);
 154 end:
 155   Py_XDECREF(set);
 156   Py_XDECREF(l);
 157   Py_XDECREF(x);
 158   return ((PyObject *)o);
 159 }
 160
 161 static PyObject *kaget_min(PyObject *me, void *hunoz)
 162   { return (PyInt_FromLong(0)); }
 163 #define kaget_max kaget_min
 164
 165 static PyObject *ksget_min(PyObject *me, void *hunoz)
 166 {
 167   PyObject *set = ((keyszset_pyobj *)me)->set;
 168   int i, n, y, x = -1;
 169   n = PyTuple_Size(set);
 170   for (i = 0; i < n; i++) {
 171     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 172     if (x == -1 || y < x) x = y;
 173   }
 174   return (PyInt_FromLong(x));
 175 }
 176
 177 static PyObject *ksget_max(PyObject *me, void *hunoz)
 178 {
 179   PyObject *set = ((keyszset_pyobj *)me)->set;
 180   int i, n, y, x = -1;
 181   n = PyTuple_Size(set);
 182   for (i = 0; i < n; i++) {
 183     y = PyInt_AsLong(PyTuple_GetItem(set, i));
 184     if (y > x) x = y;
 185   }
 186   return (PyInt_FromLong(x));
 187 }
 188
 189 static PyMemberDef keysz_pymembers[] = {
 190 #define MEMBERSTRUCT keysz_pyobj
 191 #define default dfl /* ugh! */
 192   MEMBER(default, T_INT, READONLY, "KSZ.default -> default key size")
 193 #undef default
 194 #undef MEMBERSTRUCT
 195   { 0 }
 196 };
 197
 198 static PyGetSetDef keyszany_pygetset[] = {
 199 #define GETSETNAME(op, name) ka##op##_##name
 200   GET   (min,                   "KSZ.min -> smallest allowed key size")
 201   GET   (max,                   "KSZ.min -> largest allowed key size")
 202 #undef GETSETNAME
 203   { 0 }
 204 };
 205
 206 static PyMemberDef keyszrange_pymembers[] = {
 207 #define MEMBERSTRUCT keyszrange_pyobj
 208   MEMBER(min, T_INT, READONLY,  "KSZ.min -> smallest allowed key size")
 209   MEMBER(max, T_INT, READONLY,  "KSZ.min -> largest allowed key size")
 210   MEMBER(mod, T_INT, READONLY,
 211          "KSZ.mod -> key size must be a multiple of this")
 212 #undef MEMBERSTRUCT
 213   { 0 }
 214 };
 215
 216 static PyGetSetDef keyszset_pygetset[] = {
 217 #define GETSETNAME(op, name) ks##op##_##name
 218   GET   (min,                   "KSZ.min -> smallest allowed key size")
 219   GET   (max,                   "KSZ.min -> largest allowed key size")
 220 #undef GETSETNAME
 221   { 0 }
 222 };
 223
 224 static PyMemberDef keyszset_pymembers[] = {
 225 #define MEMBERSTRUCT keyszset_pyobj
 226   MEMBER(set, T_OBJECT, READONLY,       "KSZ.set -> allowed key sizes")
 227 #undef MEMBERSTRUCT
 228   { 0 }
 229 };
 230
 231 static PyTypeObject keysz_pytype_skel = {
 232   PyObject_HEAD_INIT(0) 0,              /* Header */
 233   "catacomb.KeySZ",                     /* @tp_name@ */
 234   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 235   0,                                    /* @tp_itemsize@ */
 236
 237   0,                                    /* @tp_dealloc@ */
 238   0,                                    /* @tp_print@ */
 239   0,                                    /* @tp_getattr@ */
 240   0,                                    /* @tp_setattr@ */
 241   0,                                    /* @tp_compare@ */
 242   0,                                    /* @tp_repr@ */
 243   0,                                    /* @tp_as_number@ */
 244   0,                                    /* @tp_as_sequence@ */
 245   0,                                    /* @tp_as_mapping@ */
 246   0,                                    /* @tp_hash@ */
 247   0,                                    /* @tp_call@ */
 248   0,                                    /* @tp_str@ */
 249   0,                                    /* @tp_getattro@ */
 250   0,                                    /* @tp_setattro@ */
 251   0,                                    /* @tp_as_buffer@ */
 252   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 253     Py_TPFLAGS_BASETYPE,
 254
 255   /* @tp_doc@ */
 256 "Key size constraints.",
 257
 258   0,                                    /* @tp_traverse@ */
 259   0,                                    /* @tp_clear@ */
 260   0,                                    /* @tp_richcompare@ */
 261   0,                                    /* @tp_weaklistoffset@ */
 262   0,                                    /* @tp_iter@ */
 263   0,                                    /* @tp_iternext@ */
 264   0,                                    /* @tp_methods@ */
 265   keysz_pymembers,                      /* @tp_members@ */
 266   0,                                    /* @tp_getset@ */
 267   0,                                    /* @tp_base@ */
 268   0,                                    /* @tp_dict@ */
 269   0,                                    /* @tp_descr_get@ */
 270   0,                                    /* @tp_descr_set@ */
 271   0,                                    /* @tp_dictoffset@ */
 272   0,                                    /* @tp_init@ */
 273   PyType_GenericAlloc,                  /* @tp_alloc@ */
 274   abstract_pynew,                       /* @tp_new@ */
 275   0,                                    /* @tp_free@ */
 276   0                                     /* @tp_is_gc@ */
 277 };
 278
 279 static PyTypeObject keyszany_pytype_skel = {
 280   PyObject_HEAD_INIT(0) 0,              /* Header */
 281   "catacomb.KeySZAny",                  /* @tp_name@ */
 282   sizeof(keysz_pyobj),                  /* @tp_basicsize@ */
 283   0,                                    /* @tp_itemsize@ */
 284
 285   0,                                    /* @tp_dealloc@ */
 286   0,                                    /* @tp_print@ */
 287   0,                                    /* @tp_getattr@ */
 288   0,                                    /* @tp_setattr@ */
 289   0,                                    /* @tp_compare@ */
 290   0,                                    /* @tp_repr@ */
 291   0,                                    /* @tp_as_number@ */
 292   0,                                    /* @tp_as_sequence@ */
 293   0,                                    /* @tp_as_mapping@ */
 294   0,                                    /* @tp_hash@ */
 295   0,                                    /* @tp_call@ */
 296   0,                                    /* @tp_str@ */
 297   0,                                    /* @tp_getattro@ */
 298   0,                                    /* @tp_setattro@ */
 299   0,                                    /* @tp_as_buffer@ */
 300   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 301     Py_TPFLAGS_BASETYPE,
 302
 303   /* @tp_doc@ */
 304 "Key size constraints.  This object imposes no constraints on size.",
 305
 306   0,                                    /* @tp_traverse@ */
 307   0,                                    /* @tp_clear@ */
 308   0,                                    /* @tp_richcompare@ */
 309   0,                                    /* @tp_weaklistoffset@ */
 310   0,                                    /* @tp_iter@ */
 311   0,                                    /* @tp_iternext@ */
 312   0,                                    /* @tp_methods@ */
 313   0,                                    /* @tp_members@ */
 314   keyszany_pygetset,                    /* @tp_getset@ */
 315   0,                                    /* @tp_base@ */
 316   0,                                    /* @tp_dict@ */
 317   0,                                    /* @tp_descr_get@ */
 318   0,                                    /* @tp_descr_set@ */
 319   0,                                    /* @tp_dictoffset@ */
 320   0,                                    /* @tp_init@ */
 321   PyType_GenericAlloc,                  /* @tp_alloc@ */
 322   keyszany_pynew,                       /* @tp_new@ */
 323   0,                                    /* @tp_free@ */
 324   0                                     /* @tp_is_gc@ */
 325 };
 326
 327 static PyTypeObject keyszrange_pytype_skel = {
 328   PyObject_HEAD_INIT(0) 0,              /* Header */
 329   "catacomb.KeySZRange",                /* @tp_name@ */
 330   sizeof(keyszrange_pyobj),             /* @tp_basicsize@ */
 331   0,                                    /* @tp_itemsize@ */
 332
 333   0,                                    /* @tp_dealloc@ */
 334   0,                                    /* @tp_print@ */
 335   0,                                    /* @tp_getattr@ */
 336   0,                                    /* @tp_setattr@ */
 337   0,                                    /* @tp_compare@ */
 338   0,                                    /* @tp_repr@ */
 339   0,                                    /* @tp_as_number@ */
 340   0,                                    /* @tp_as_sequence@ */
 341   0,                                    /* @tp_as_mapping@ */
 342   0,                                    /* @tp_hash@ */
 343   0,                                    /* @tp_call@ */
 344   0,                                    /* @tp_str@ */
 345   0,                                    /* @tp_getattro@ */
 346   0,                                    /* @tp_setattro@ */
 347   0,                                    /* @tp_as_buffer@ */
 348   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 349     Py_TPFLAGS_BASETYPE,
 350
 351   /* @tp_doc@ */
 352 "Key size constraints.  This object asserts minimum and maximum (if\n\
 353 sizes, and requires the key length to be a multiple of some value.",
 354
 355   0,                                    /* @tp_traverse@ */
 356   0,                                    /* @tp_clear@ */
 357   0,                                    /* @tp_richcompare@ */
 358   0,                                    /* @tp_weaklistoffset@ */
 359   0,                                    /* @tp_iter@ */
 360   0,                                    /* @tp_iternext@ */
 361   0,                                    /* @tp_methods@ */
 362   keyszrange_pymembers,                 /* @tp_members@ */
 363   0,                                    /* @tp_getset@ */
 364   0,                                    /* @tp_base@ */
 365   0,                                    /* @tp_dict@ */
 366   0,                                    /* @tp_descr_get@ */
 367   0,                                    /* @tp_descr_set@ */
 368   0,                                    /* @tp_dictoffset@ */
 369   0,                                    /* @tp_init@ */
 370   PyType_GenericAlloc,                  /* @tp_alloc@ */
 371   keyszrange_pynew,                     /* @tp_new@ */
 372   0,                                    /* @tp_free@ */
 373   0                                     /* @tp_is_gc@ */
 374 };
 375
 376 static PyTypeObject keyszset_pytype_skel = {
 377   PyObject_HEAD_INIT(0) 0,              /* Header */
 378   "catacomb.KeySZSet",                  /* @tp_name@ */
 379   sizeof(keyszset_pyobj),               /* @tp_basicsize@ */
 380   0,                                    /* @tp_itemsize@ */
 381
 382   0,                                    /* @tp_dealloc@ */
 383   0,                                    /* @tp_print@ */
 384   0,                                    /* @tp_getattr@ */
 385   0,                                    /* @tp_setattr@ */
 386   0,                                    /* @tp_compare@ */
 387   0,                                    /* @tp_repr@ */
 388   0,                                    /* @tp_as_number@ */
 389   0,                                    /* @tp_as_sequence@ */
 390   0,                                    /* @tp_as_mapping@ */
 391   0,                                    /* @tp_hash@ */
 392   0,                                    /* @tp_call@ */
 393   0,                                    /* @tp_str@ */
 394   0,                                    /* @tp_getattro@ */
 395   0,                                    /* @tp_setattro@ */
 396   0,                                    /* @tp_as_buffer@ */
 397   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 398     Py_TPFLAGS_BASETYPE,
 399
 400   /* @tp_doc@ */
 401 "Key size constraints.  This object requires the key to be one of a\n\
 402 few listed sizes.",
 403
 404   0,                                    /* @tp_traverse@ */
 405   0,                                    /* @tp_clear@ */
 406   0,                                    /* @tp_richcompare@ */
 407   0,                                    /* @tp_weaklistoffset@ */
 408   0,                                    /* @tp_iter@ */
 409   0,                                    /* @tp_iternext@ */
 410   0,                                    /* @tp_methods@ */
 411   keyszset_pymembers,                   /* @tp_members@ */
 412   keyszset_pygetset,                    /* @tp_getset@ */
 413   0,                                    /* @tp_base@ */
 414   0,                                    /* @tp_dict@ */
 415   0,                                    /* @tp_descr_get@ */
 416   0,                                    /* @tp_descr_set@ */
 417   0,                                    /* @tp_dictoffset@ */
 418   0,                                    /* @tp_init@ */
 419   PyType_GenericAlloc,                  /* @tp_alloc@ */
 420   keyszset_pynew,                       /* @tp_new@ */
 421   0,                                    /* @tp_free@ */
 422   0                                     /* @tp_is_gc@ */
 423 };
 424
 425 /*----- Symmetric encryption ----------------------------------------------*/
 426
 427 PyTypeObject *gccipher_pytype, *gcipher_pytype;
 428
 429 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
 430 CONVFUNC(gcipher, gcipher *, GCIPHER_C)
 431
 432 PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c, unsigned f)
 433 {
 434   gcipher_pyobj *g;
 435   if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
 436   else Py_INCREF(cobj);
 437   g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
 438   g->c = c;
 439   g->f = f;
 440   return ((PyObject *)g);
 441 }
 442
 443 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 444 {
 445   char *kwlist[] = { "k", 0 };
 446   char *k;
 447   int sz;
 448
 449   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &k, &sz))
 450     goto end;
 451   if (keysz(sz, GCCIPHER_CC(ty)->keysz) != sz) VALERR("bad key length");
 452   return (gcipher_pywrap((PyObject *)ty,
 453                          GC_INIT(GCCIPHER_CC(ty), k, sz),
 454                          f_freeme));
 455 end:
 456   return (0);
 457 }
 458
 459 PyObject *gccipher_pywrap(gccipher *cc)
 460 {
 461   gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
 462   g->cc = cc;
 463   g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
 464   g->ty.ht_type.tp_base = gcipher_pytype;
 465   Py_INCREF(gcipher_pytype);
 466   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 467                             Py_TPFLAGS_BASETYPE |
 468                             Py_TPFLAGS_HEAPTYPE);
 469   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 470   g->ty.ht_type.tp_free = 0;
 471   g->ty.ht_type.tp_new = gcipher_pynew;
 472   PyType_Ready(&g->ty.ht_type);
 473   return ((PyObject *)g);
 474 }
 475
 476 static void gcipher_pydealloc(PyObject *me)
 477 {
 478   if (GCIPHER_F(me) & f_freeme)
 479     GC_DESTROY(GCIPHER_C(me));
 480   Py_DECREF(me->ob_type);
 481   FREEOBJ(me);
 482 }
 483
 484 static PyObject *gccget_name(PyObject *me, void *hunoz)
 485   { return (PyString_FromString(GCCIPHER_CC(me)->name)); }
 486
 487 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
 488   { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
 489
 490 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
 491   { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
 492
 493 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
 494 {
 495   char *p;
 496   int sz;
 497   PyObject *rc = 0;
 498
 499   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &sz)) return (0);
 500   rc = bytestring_pywrap(0, sz);
 501   GC_ENCRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 502   return (rc);
 503 }
 504
 505 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
 506 {
 507   char *p;
 508   int sz;
 509   PyObject *rc = 0;
 510
 511   if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
 512   rc = bytestring_pywrap(0, sz);
 513   p = PyString_AS_STRING(rc);
 514   memset(p, 0, sz);
 515   GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
 516   return (rc);
 517 }
 518
 519 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
 520 {
 521   char *p;
 522   int sz;
 523   PyObject *rc = 0;
 524
 525   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &sz)) return (0);
 526   rc = bytestring_pywrap(0, sz);
 527   GC_DECRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
 528   return (rc);
 529 }
 530
 531 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
 532 {
 533   char *p;
 534   int sz;
 535   PyObject *rc = 0;
 536
 537   if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
 538   rc = bytestring_pywrap(0, sz);
 539   p = PyString_AS_STRING(rc);
 540   memset(p, 0, sz);
 541   GC_DECRYPT(GCIPHER_C(me), p, p, sz);
 542   return (rc);
 543 }
 544
 545 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
 546 {
 547   char *p;
 548   int sz;
 549
 550   if (!PyArg_ParseTuple(arg, "s#:setiv", &p, &sz)) goto end;
 551   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 552   if (sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
 553   GC_SETIV(GCIPHER_C(me), p);
 554   RETURN_ME;
 555 end:
 556   return (0);
 557 }
 558
 559 static PyObject *gcmeth_bdry(PyObject *me, PyObject *arg)
 560 {
 561   if (!PyArg_ParseTuple(arg, ":bdry")) goto end;
 562   if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
 563   GC_BDRY(GCIPHER_C(me));
 564   RETURN_ME;
 565 end:
 566   return (0);
 567 }
 568
 569 static PyGetSetDef gccipher_pygetset[] = {
 570 #define GETSETNAME(op, name) gcc##op##_##name
 571   GET   (keysz,                 "CC.keysz -> acceptable key sizes")
 572   GET   (blksz,                 "CC.blksz -> block size, or zero")
 573   GET   (name,                  "CC.name -> name of this kind of cipher")
 574 #undef GETSETNAME
 575   { 0 }
 576 };
 577
 578 static PyMethodDef gcipher_pymethods[] = {
 579 #define METHNAME(name) gcmeth_##name
 580   METH  (encrypt,               "C.encrypt(PT) -> CT")
 581   METH  (enczero,               "C.enczero(N) -> CT")
 582   METH  (decrypt,               "C.decrypt(CT) -> PT")
 583   METH  (deczero,               "C.deczero(N) -> PT")
 584   METH  (setiv,                 "C.setiv(IV)")
 585   METH  (bdry,                  "C.bdry()")
 586 #undef METHNAME
 587   { 0 }
 588 };
 589
 590 static PyTypeObject gccipher_pytype_skel = {
 591   PyObject_HEAD_INIT(0) 0,              /* Header */
 592   "catacomb.GCCipher",                  /* @tp_name@ */
 593   sizeof(gccipher_pyobj),               /* @tp_basicsize@ */
 594   0,                                    /* @tp_itemsize@ */
 595
 596   0,                                    /* @tp_dealloc@ */
 597   0,                                    /* @tp_print@ */
 598   0,                                    /* @tp_getattr@ */
 599   0,                                    /* @tp_setattr@ */
 600   0,                                    /* @tp_compare@ */
 601   0,                                    /* @tp_repr@ */
 602   0,                                    /* @tp_as_number@ */
 603   0,                                    /* @tp_as_sequence@ */
 604   0,                                    /* @tp_as_mapping@ */
 605   0,                                    /* @tp_hash@ */
 606   0,                                    /* @tp_call@ */
 607   0,                                    /* @tp_str@ */
 608   0,                                    /* @tp_getattro@ */
 609   0,                                    /* @tp_setattro@ */
 610   0,                                    /* @tp_as_buffer@ */
 611   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 612     Py_TPFLAGS_BASETYPE,
 613
 614   /* @tp_doc@ */
 615 "Symmetric cipher metaclass.",
 616
 617   0,                                    /* @tp_traverse@ */
 618   0,                                    /* @tp_clear@ */
 619   0,                                    /* @tp_richcompare@ */
 620   0,                                    /* @tp_weaklistoffset@ */
 621   0,                                    /* @tp_iter@ */
 622   0,                                    /* @tp_iternext@ */
 623   0,                                    /* @tp_methods@ */
 624   0,                                    /* @tp_members@ */
 625   gccipher_pygetset,                    /* @tp_getset@ */
 626   0,                                    /* @tp_base@ */
 627   0,                                    /* @tp_dict@ */
 628   0,                                    /* @tp_descr_get@ */
 629   0,                                    /* @tp_descr_set@ */
 630   0,                                    /* @tp_dictoffset@ */
 631   0,                                    /* @tp_init@ */
 632   PyType_GenericAlloc,                  /* @tp_alloc@ */
 633   abstract_pynew,                       /* @tp_new@ */
 634   0,                                    /* @tp_free@ */
 635   0                                     /* @tp_is_gc@ */
 636 };
 637
 638 static PyTypeObject gcipher_pytype_skel = {
 639   PyObject_HEAD_INIT(0) 0,              /* Header */
 640   "catacomb.GCipher",                   /* @tp_name@ */
 641   sizeof(gcipher_pyobj),                /* @tp_basicsize@ */
 642   0,                                    /* @tp_itemsize@ */
 643
 644   gcipher_pydealloc,                    /* @tp_dealloc@ */
 645   0,                                    /* @tp_print@ */
 646   0,                                    /* @tp_getattr@ */
 647   0,                                    /* @tp_setattr@ */
 648   0,                                    /* @tp_compare@ */
 649   0,                                    /* @tp_repr@ */
 650   0,                                    /* @tp_as_number@ */
 651   0,                                    /* @tp_as_sequence@ */
 652   0,                                    /* @tp_as_mapping@ */
 653   0,                                    /* @tp_hash@ */
 654   0,                                    /* @tp_call@ */
 655   0,                                    /* @tp_str@ */
 656   0,                                    /* @tp_getattro@ */
 657   0,                                    /* @tp_setattro@ */
 658   0,                                    /* @tp_as_buffer@ */
 659   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 660     Py_TPFLAGS_BASETYPE,
 661
 662   /* @tp_doc@ */
 663 "Symmetric cipher, abstract base class.",
 664
 665   0,                                    /* @tp_traverse@ */
 666   0,                                    /* @tp_clear@ */
 667   0,                                    /* @tp_richcompare@ */
 668   0,                                    /* @tp_weaklistoffset@ */
 669   0,                                    /* @tp_iter@ */
 670   0,                                    /* @tp_iternext@ */
 671   gcipher_pymethods,                    /* @tp_methods@ */
 672   0,                                    /* @tp_members@ */
 673   0,                                    /* @tp_getset@ */
 674   0,                                    /* @tp_base@ */
 675   0,                                    /* @tp_dict@ */
 676   0,                                    /* @tp_descr_get@ */
 677   0,                                    /* @tp_descr_set@ */
 678   0,                                    /* @tp_dictoffset@ */
 679   0,                                    /* @tp_init@ */
 680   PyType_GenericAlloc,                  /* @tp_alloc@ */
 681   abstract_pynew,                       /* @tp_new@ */
 682   0,                                    /* @tp_free@ */
 683   0                                     /* @tp_is_gc@ */
 684 };
 685
 686 /*----- Hash functions ----------------------------------------------------*/
 687
 688 PyTypeObject *gchash_pytype, *ghash_pytype;
 689
 690 CONVFUNC(gchash, gchash *, GCHASH_CH)
 691 CONVFUNC(ghash, ghash *, GHASH_H)
 692
 693 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 694 {
 695   char *kwlist[] = { 0 };
 696   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", kwlist))
 697     goto end;
 698   return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty)), f_freeme));
 699 end:
 700   return (0);
 701 }
 702
 703 PyObject *gchash_pywrap(gchash *ch)
 704 {
 705   gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
 706   g->ch = ch;
 707   g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
 708   g->ty.ht_type.tp_base = ghash_pytype;
 709   Py_INCREF(ghash_pytype);
 710   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 711                             Py_TPFLAGS_BASETYPE |
 712                             Py_TPFLAGS_HEAPTYPE);
 713   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 714   g->ty.ht_type.tp_free = 0;
 715   g->ty.ht_type.tp_new = ghash_pynew;
 716   PyType_Ready(&g->ty.ht_type);
 717   return ((PyObject *)g);
 718 }
 719
 720 PyObject *ghash_pywrap(PyObject *cobj, ghash *h, unsigned f)
 721 {
 722   ghash_pyobj *g;
 723   if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
 724   else Py_INCREF(cobj);
 725   g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
 726   g->h = h;
 727   g->f = f;
 728   return ((PyObject *)g);
 729 }
 730
 731 static void ghash_pydealloc(PyObject *me)
 732 {
 733   if (GHASH_F(me) & f_freeme)
 734     GH_DESTROY(GHASH_H(me));
 735   Py_DECREF(me->ob_type);
 736   FREEOBJ(me);
 737 }
 738
 739 static PyObject *gchget_name(PyObject *me, void *hunoz)
 740   { return (PyString_FromString(GCHASH_CH(me)->name)); }
 741
 742 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
 743   { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
 744
 745 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
 746   { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
 747
 748 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
 749 {
 750   char *p;
 751   int sz;
 752   if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
 753   GH_HASH(GHASH_H(me), p, sz);
 754   RETURN_ME;
 755 }
 756
 757 static PyObject *ghmeth_done(PyObject *me, PyObject *arg)
 758 {
 759   ghash *g;
 760   PyObject *rc;
 761   if (!PyArg_ParseTuple(arg, ":done")) return (0);
 762   g = GH_COPY(GHASH_H(me));
 763   rc = bytestring_pywrap(0, g->ops->c->hashsz);
 764   GH_DONE(g, PyString_AS_STRING(rc));
 765   GH_DESTROY(g);
 766   return (rc);
 767 }
 768
 769 static PyGetSetDef gchash_pygetset[] = {
 770 #define GETSETNAME(op, name) gch##op##_##name
 771   GET   (bufsz,                 "CH.bufsz -> hash buffer size, or zero")
 772   GET   (hashsz,                "CH.blksz -> hash output size")
 773   GET   (name,                  "CH.name -> name of this kind of hash")
 774 #undef GETSETNAME
 775   { 0 }
 776 };
 777
 778 #define GHMETH_HASHU_(n, W, w)                                          \
 779   static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg)         \
 780   {                                                                     \
 781     uint##n x;                                                          \
 782     if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) goto end;  \
 783     GH_HASHU##W(GHASH_H(me), x);                                        \
 784     RETURN_ME;                                                          \
 785   end:                                                                  \
 786     return (0);                                                         \
 787   }
 788 DOUINTCONV(GHMETH_HASHU_)
 789
 790 #define GHMETH_HASHBUF_(n, W, w)                                        \
 791   static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg)       \
 792   {                                                                     \
 793     char *p;                                                            \
 794     int sz;                                                             \
 795     if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end;     \
 796     if (sz > MASK##n) TYERR("string too long");                         \
 797     GH_HASHBUF##W(GHASH_H(me), p, sz);                                  \
 798     RETURN_ME;                                                          \
 799   end:                                                                  \
 800     return (0);                                                         \
 801   }
 802 DOUINTCONV(GHMETH_HASHBUF_)
 803
 804 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
 805 {
 806   char *p;
 807   if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
 808   GH_HASHSTRZ(GHASH_H(me), p);
 809   RETURN_ME;
 810 }
 811
 812 static PyMethodDef ghash_pymethods[] = {
 813 #define METHNAME(name) ghmeth_##name
 814   METH  (hash,                  "H.hash(M)")
 815 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
 816   DOUINTCONV(METHU_)
 817 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
 818   DOUINTCONV(METHBUF_)
 819   METH  (hashstrz,              "H.hashstrz(STRING)")
 820   METH  (done,                  "H.done() -> HASH")
 821 #undef METHNAME
 822   { 0 }
 823 };
 824
 825 static PyTypeObject gchash_pytype_skel = {
 826   PyObject_HEAD_INIT(0) 0,              /* Header */
 827   "catacomb.GCHash",                    /* @tp_name@ */
 828   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
 829   0,                                    /* @tp_itemsize@ */
 830
 831   0,                                    /* @tp_dealloc@ */
 832   0,                                    /* @tp_print@ */
 833   0,                                    /* @tp_getattr@ */
 834   0,                                    /* @tp_setattr@ */
 835   0,                                    /* @tp_compare@ */
 836   0,                                    /* @tp_repr@ */
 837   0,                                    /* @tp_as_number@ */
 838   0,                                    /* @tp_as_sequence@ */
 839   0,                                    /* @tp_as_mapping@ */
 840   0,                                    /* @tp_hash@ */
 841   0,                                    /* @tp_call@ */
 842   0,                                    /* @tp_str@ */
 843   0,                                    /* @tp_getattro@ */
 844   0,                                    /* @tp_setattro@ */
 845   0,                                    /* @tp_as_buffer@ */
 846   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 847     Py_TPFLAGS_BASETYPE,
 848
 849   /* @tp_doc@ */
 850 "Hash function metaclass.",
 851
 852   0,                                    /* @tp_traverse@ */
 853   0,                                    /* @tp_clear@ */
 854   0,                                    /* @tp_richcompare@ */
 855   0,                                    /* @tp_weaklistoffset@ */
 856   0,                                    /* @tp_iter@ */
 857   0,                                    /* @tp_iternext@ */
 858   0,                                    /* @tp_methods@ */
 859   0,                                    /* @tp_members@ */
 860   gchash_pygetset,                      /* @tp_getset@ */
 861   0,                                    /* @tp_base@ */
 862   0,                                    /* @tp_dict@ */
 863   0,                                    /* @tp_descr_get@ */
 864   0,                                    /* @tp_descr_set@ */
 865   0,                                    /* @tp_dictoffset@ */
 866   0,                                    /* @tp_init@ */
 867   PyType_GenericAlloc,                  /* @tp_alloc@ */
 868   abstract_pynew,                       /* @tp_new@ */
 869   0,                                    /* @tp_free@ */
 870   0                                     /* @tp_is_gc@ */
 871 };
 872
 873 static PyTypeObject ghash_pytype_skel = {
 874   PyObject_HEAD_INIT(0) 0,              /* Header */
 875   "catacomb.GHash",                     /* @tp_name@ */
 876   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
 877   0,                                    /* @tp_itemsize@ */
 878
 879   ghash_pydealloc,                      /* @tp_dealloc@ */
 880   0,                                    /* @tp_print@ */
 881   0,                                    /* @tp_getattr@ */
 882   0,                                    /* @tp_setattr@ */
 883   0,                                    /* @tp_compare@ */
 884   0,                                    /* @tp_repr@ */
 885   0,                                    /* @tp_as_number@ */
 886   0,                                    /* @tp_as_sequence@ */
 887   0,                                    /* @tp_as_mapping@ */
 888   0,                                    /* @tp_hash@ */
 889   0,                                    /* @tp_call@ */
 890   0,                                    /* @tp_str@ */
 891   0,                                    /* @tp_getattro@ */
 892   0,                                    /* @tp_setattro@ */
 893   0,                                    /* @tp_as_buffer@ */
 894   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 895     Py_TPFLAGS_BASETYPE,
 896
 897   /* @tp_doc@ */
 898 "Hash function, abstract base class.",
 899
 900   0,                                    /* @tp_traverse@ */
 901   0,                                    /* @tp_clear@ */
 902   0,                                    /* @tp_richcompare@ */
 903   0,                                    /* @tp_weaklistoffset@ */
 904   0,                                    /* @tp_iter@ */
 905   0,                                    /* @tp_iternext@ */
 906   ghash_pymethods,                      /* @tp_methods@ */
 907   0,                                    /* @tp_members@ */
 908   0,                                    /* @tp_getset@ */
 909   0,                                    /* @tp_base@ */
 910   0,                                    /* @tp_dict@ */
 911   0,                                    /* @tp_descr_get@ */
 912   0,                                    /* @tp_descr_set@ */
 913   0,                                    /* @tp_dictoffset@ */
 914   0,                                    /* @tp_init@ */
 915   PyType_GenericAlloc,                  /* @tp_alloc@ */
 916   abstract_pynew,                       /* @tp_new@ */
 917   0,                                    /* @tp_free@ */
 918   0                                     /* @tp_is_gc@ */
 919 };
 920
 921 /*----- Message authentication --------------------------------------------*/
 922
 923 PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
 924
 925 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
 926 CONVFUNC(gmac, gmac *, GMAC_M)
 927 CONVFUNC(gmhash, ghash *, GHASH_H)
 928
 929 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 930 {
 931   char *kwlist[] = { "k", 0 };
 932   char *k;
 933   int sz;
 934
 935   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &k, &sz))
 936     goto end;
 937   if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
 938   return (gmac_pywrap((PyObject *)ty,
 939                       GM_KEY(GCMAC_CM(ty), k, sz),
 940                       f_freeme));
 941 end:
 942   return (0);
 943 }
 944
 945 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 946 {
 947   char *kwlist[] = { 0 };
 948   ghash_pyobj *g;
 949
 950   if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", kwlist)) return (0);
 951   g = PyObject_NEW(ghash_pyobj, ty);
 952   g->h = GM_INIT(GMAC_M(ty));
 953   g->f = f_freeme;
 954   Py_INCREF(ty);
 955   return ((PyObject *)g);
 956 }
 957
 958 PyObject *gcmac_pywrap(gcmac *cm)
 959 {
 960   gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
 961   g->cm = cm;
 962   g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
 963   g->ty.ht_type.tp_base = gmac_pytype;
 964   Py_INCREF(gmac_pytype);
 965   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 966                             Py_TPFLAGS_BASETYPE |
 967                             Py_TPFLAGS_HEAPTYPE);
 968   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 969   g->ty.ht_type.tp_free = 0;
 970   g->ty.ht_type.tp_new = gmac_pynew;
 971   PyType_Ready(&g->ty.ht_type);
 972   return ((PyObject *)g);
 973 }
 974
 975 PyObject *gmac_pywrap(PyObject *cobj, gmac *m, unsigned f)
 976 {
 977   gmac_pyobj *g;
 978   if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
 979   else Py_INCREF(cobj);
 980   g = newtype((PyTypeObject *)cobj, 0, 0);
 981   g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
 982   g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
 983   g->ty.ht_type.tp_base = gmhash_pytype;
 984   Py_INCREF(gmac_pytype);
 985   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 986                             Py_TPFLAGS_BASETYPE |
 987                             Py_TPFLAGS_HEAPTYPE);
 988   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
 989   g->ty.ht_type.tp_free = 0;
 990   g->ty.ht_type.tp_new = gmhash_pynew;
 991   PyType_Ready(&g->ty.ht_type);
 992   g->m = m;
 993   g->f = f;
 994   return ((PyObject *)g);
 995 }
 996
 997 static void gmac_pydealloc(PyObject *me)
 998 {
 999   if (GMAC_F(me) & f_freeme)
1000     GM_DESTROY(GMAC_M(me));
1001   Py_DECREF(me->ob_type);
1002   PyType_Type.tp_dealloc(me);
1003 }
1004
1005 static PyObject *gcmget_name(PyObject *me, void *hunoz)
1006   { return (PyString_FromString(GCMAC_CM(me)->name)); }
1007
1008 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
1009   { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
1010
1011 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
1012   { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
1013
1014 static PyGetSetDef gcmac_pygetset[] = {
1015 #define GETSETNAME(op, name) gcm##op##_##name
1016   GET   (keysz,                 "CM.keysz -> acceptable key sizes")
1017   GET   (tagsz,                 "CM.tagsz -> MAC output size")
1018   GET   (name,                  "CM.name -> name of this kind of MAC")
1019 #undef GETSETNAME
1020   { 0 }
1021 };
1022
1023 static PyTypeObject gcmac_pytype_skel = {
1024   PyObject_HEAD_INIT(0) 0,              /* Header */
1025   "catacomb.GCMAC",                     /* @tp_name@ */
1026   sizeof(gchash_pyobj),                 /* @tp_basicsize@ */
1027   0,                                    /* @tp_itemsize@ */
1028
1029   0,                                    /* @tp_dealloc@ */
1030   0,                                    /* @tp_print@ */
1031   0,                                    /* @tp_getattr@ */
1032   0,                                    /* @tp_setattr@ */
1033   0,                                    /* @tp_compare@ */
1034   0,                                    /* @tp_repr@ */
1035   0,                                    /* @tp_as_number@ */
1036   0,                                    /* @tp_as_sequence@ */
1037   0,                                    /* @tp_as_mapping@ */
1038   0,                                    /* @tp_hash@ */
1039   0,                                    /* @tp_call@ */
1040   0,                                    /* @tp_str@ */
1041   0,                                    /* @tp_getattro@ */
1042   0,                                    /* @tp_setattro@ */
1043   0,                                    /* @tp_as_buffer@ */
1044   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1045     Py_TPFLAGS_BASETYPE,
1046
1047   /* @tp_doc@ */
1048 "Message authentication code metametaclass.",
1049
1050   0,                                    /* @tp_traverse@ */
1051   0,                                    /* @tp_clear@ */
1052   0,                                    /* @tp_richcompare@ */
1053   0,                                    /* @tp_weaklistoffset@ */
1054   0,                                    /* @tp_iter@ */
1055   0,                                    /* @tp_iternext@ */
1056   0,                                    /* @tp_methods@ */
1057   0,                                    /* @tp_members@ */
1058   gcmac_pygetset,                       /* @tp_getset@ */
1059   0,                                    /* @tp_base@ */
1060   0,                                    /* @tp_dict@ */
1061   0,                                    /* @tp_descr_get@ */
1062   0,                                    /* @tp_descr_set@ */
1063   0,                                    /* @tp_dictoffset@ */
1064   0,                                    /* @tp_init@ */
1065   PyType_GenericAlloc,                  /* @tp_alloc@ */
1066   abstract_pynew,                       /* @tp_new@ */
1067   0,                                    /* @tp_free@ */
1068   0                                     /* @tp_is_gc@ */
1069 };
1070
1071 static PyTypeObject gmac_pytype_skel = {
1072   PyObject_HEAD_INIT(0) 0,              /* Header */
1073   "catacomb.GMAC",                      /* @tp_name@ */
1074   sizeof(gmac_pyobj),                   /* @tp_basicsize@ */
1075   0,                                    /* @tp_itemsize@ */
1076
1077   gmac_pydealloc,                       /* @tp_dealloc@ */
1078   0,                                    /* @tp_print@ */
1079   0,                                    /* @tp_getattr@ */
1080   0,                                    /* @tp_setattr@ */
1081   0,                                    /* @tp_compare@ */
1082   0,                                    /* @tp_repr@ */
1083   0,                                    /* @tp_as_number@ */
1084   0,                                    /* @tp_as_sequence@ */
1085   0,                                    /* @tp_as_mapping@ */
1086   0,                                    /* @tp_hash@ */
1087   0,                                    /* @tp_call@ */
1088   0,                                    /* @tp_str@ */
1089   0,                                    /* @tp_getattro@ */
1090   0,                                    /* @tp_setattro@ */
1091   0,                                    /* @tp_as_buffer@ */
1092   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1093     Py_TPFLAGS_BASETYPE,
1094
1095   /* @tp_doc@ */
1096 "Message authentication code metaclass, abstract base class.",
1097
1098   0,                                    /* @tp_traverse@ */
1099   0,                                    /* @tp_clear@ */
1100   0,                                    /* @tp_richcompare@ */
1101   0,                                    /* @tp_weaklistoffset@ */
1102   0,                                    /* @tp_iter@ */
1103   0,                                    /* @tp_iternext@ */
1104   0,                                    /* @tp_methods@ */
1105   0,                                    /* @tp_members@ */
1106   0,                                    /* @tp_getset@ */
1107   0,                                    /* @tp_base@ */
1108   0,                                    /* @tp_dict@ */
1109   0,                                    /* @tp_descr_get@ */
1110   0,                                    /* @tp_descr_set@ */
1111   0,                                    /* @tp_dictoffset@ */
1112   0,                                    /* @tp_init@ */
1113   PyType_GenericAlloc,                  /* @tp_alloc@ */
1114   abstract_pynew,                       /* @tp_new@ */
1115   0,                                    /* @tp_free@ */
1116   0                                     /* @tp_is_gc@ */
1117 };
1118
1119 static PyTypeObject gmhash_pytype_skel = {
1120   PyObject_HEAD_INIT(0) 0,              /* Header */
1121   "catacomb.GMACHash",                  /* @tp_name@ */
1122   sizeof(ghash_pyobj),                  /* @tp_basicsize@ */
1123   0,                                    /* @tp_itemsize@ */
1124
1125   ghash_pydealloc,                      /* @tp_dealloc@ */
1126   0,                                    /* @tp_print@ */
1127   0,                                    /* @tp_getattr@ */
1128   0,                                    /* @tp_setattr@ */
1129   0,                                    /* @tp_compare@ */
1130   0,                                    /* @tp_repr@ */
1131   0,                                    /* @tp_as_number@ */
1132   0,                                    /* @tp_as_sequence@ */
1133   0,                                    /* @tp_as_mapping@ */
1134   0,                                    /* @tp_hash@ */
1135   0,                                    /* @tp_call@ */
1136   0,                                    /* @tp_str@ */
1137   0,                                    /* @tp_getattro@ */
1138   0,                                    /* @tp_setattro@ */
1139   0,                                    /* @tp_as_buffer@ */
1140   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1141     Py_TPFLAGS_BASETYPE,
1142
1143   /* @tp_doc@ */
1144 "Message authentication code, abstract base class.",
1145
1146   0,                                    /* @tp_traverse@ */
1147   0,                                    /* @tp_clear@ */
1148   0,                                    /* @tp_richcompare@ */
1149   0,                                    /* @tp_weaklistoffset@ */
1150   0,                                    /* @tp_iter@ */
1151   0,                                    /* @tp_iternext@ */
1152   0,                                    /* @tp_methods@ */
1153   0,                                    /* @tp_members@ */
1154   0,                                    /* @tp_getset@ */
1155   0,                                    /* @tp_base@ */
1156   0,                                    /* @tp_dict@ */
1157   0,                                    /* @tp_descr_get@ */
1158   0,                                    /* @tp_descr_set@ */
1159   0,                                    /* @tp_dictoffset@ */
1160   0,                                    /* @tp_init@ */
1161   PyType_GenericAlloc,                  /* @tp_alloc@ */
1162   abstract_pynew,                       /* @tp_new@ */
1163   0,                                    /* @tp_free@ */
1164   0                                     /* @tp_is_gc@ */
1165 };
1166
1167 /*----- Pseudorandom permutations -----------------------------------------*/
1168
1169 static PyTypeObject *gcprp_pytype, *gprp_pytype;
1170
1171 typedef struct prpinfo {
1172   const char *name;
1173   const octet *keysz;
1174   size_t ctxsz;
1175   size_t blksz;
1176   void (*init)(void *, const void *, size_t);
1177   void (*eblk)(void *, const void *, void *);
1178   void (*dblk)(void *, const void *, void *);
1179 } prpinfo;
1180
1181 #define PRP_DEF(PRE, pre)                                               \
1182   static void pre##_prpinit(void *ctx, const void *k, size_t ksz)       \
1183     { pre##_init(ctx, k, ksz); }                                        \
1184   static void pre##_prpeblk(void *ctx, const void *in, void *out)       \
1185   {                                                                     \
1186     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
1187     pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
1188   }                                                                     \
1189   static void pre##_prpdblk(void *ctx, const void *in, void *out)       \
1190   {                                                                     \
1191     uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in);                     \
1192     pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w);                     \
1193   }                                                                     \
1194   static const prpinfo pre##_prpinfo = {                                \
1195     #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ,                  \
1196     pre##_prpinit, pre##_prpeblk, pre##_prpdblk                         \
1197   };
1198 PRPS(PRP_DEF)
1199
1200 static const struct prpinfo *const gprptab[] = {
1201 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
1202   PRPS(PRP_ENTRY)
1203   0
1204 };
1205
1206 typedef struct gcprp_pyobj {
1207   PyHeapTypeObject ty;
1208   const prpinfo *prp;
1209 } gcprp_pyobj;
1210 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
1211
1212 typedef struct gprp_pyobj {
1213   PyObject_HEAD
1214   const prpinfo *prp;
1215 } gprp_pyobj;
1216 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
1217 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
1218
1219 typedef struct prp {
1220   const prpinfo *prp;
1221   void *ctx;
1222 } prp;
1223
1224 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1225 {
1226   char *kwlist[] = { "key", 0 };
1227   char *k;
1228   int sz;
1229   const prpinfo *prp = GCPRP_PRP(ty);
1230   PyObject *me;
1231
1232   if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &k, &sz))
1233     goto end;
1234   if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
1235   me = (PyObject *)ty->tp_alloc(ty, 0);
1236   GPRP_PRP(me) = prp;
1237   prp->init(GPRP_CTX(me), k, sz);
1238   Py_INCREF(me);
1239   return (me);
1240 end:
1241   return (0);
1242 }
1243
1244 static void gprp_pydealloc(PyObject *me)
1245   { Py_DECREF(me->ob_type); FREEOBJ(me); }
1246
1247 static PyObject *gcprp_pywrap(const prpinfo *prp)
1248 {
1249   gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
1250   g->prp = prp;
1251   g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
1252   g->ty.ht_type.tp_base = gprp_pytype;
1253   Py_INCREF(gprp_pytype);
1254   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1255                             Py_TPFLAGS_BASETYPE |
1256                             Py_TPFLAGS_HEAPTYPE);
1257   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1258   g->ty.ht_type.tp_free = 0;
1259   g->ty.ht_type.tp_new = gprp_pynew;
1260   PyType_Ready(&g->ty.ht_type);
1261   return ((PyObject *)g);
1262 }
1263
1264 static PyObject *gcpget_name(PyObject *me, void *hunoz)
1265   { return (PyString_FromString(GCPRP_PRP(me)->name)); }
1266 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
1267   { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
1268 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
1269   { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
1270
1271 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
1272 {
1273   char *p;
1274   int n;
1275   PyObject *rc = 0;
1276
1277   if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
1278   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
1279   rc = bytestring_pywrap(0, n);
1280   GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
1281 end:
1282   return (rc);
1283 }
1284
1285 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
1286 {
1287   char *p;
1288   int n;
1289   PyObject *rc = 0;
1290
1291   if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
1292   if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
1293   rc = bytestring_pywrap(0, n);
1294   GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
1295 end:
1296   return (rc);
1297 }
1298
1299 static PyGetSetDef gcprp_pygetset[] = {
1300 #define GETSETNAME(op, name) gcp##op##_##name
1301   GET   (keysz,                 "CP.keysz -> acceptable key sizes")
1302   GET   (blksz,                 "CP.blksz -> block size")
1303   GET   (name,                  "CP.name -> name of this kind of PRP")
1304 #undef GETSETNAME
1305   { 0 }
1306 };
1307
1308 static PyMethodDef gprp_pymethods[] = {
1309 #define METHNAME(name) gpmeth_##name
1310   METH  (encrypt,               "P.encrypt(PT) -> CT")
1311   METH  (decrypt,               "P.decrypt(CT) -> PT")
1312 #undef METHNAME
1313   { 0 }
1314 };
1315
1316 static PyTypeObject gcprp_pytype_skel = {
1317   PyObject_HEAD_INIT(0) 0,              /* Header */
1318   "catacomb.GCPRP",                     /* @tp_name@ */
1319   sizeof(gcprp_pyobj),                  /* @tp_basicsize@ */
1320   0,                                    /* @tp_itemsize@ */
1321
1322   0,                                    /* @tp_dealloc@ */
1323   0,                                    /* @tp_print@ */
1324   0,                                    /* @tp_getattr@ */
1325   0,                                    /* @tp_setattr@ */
1326   0,                                    /* @tp_compare@ */
1327   0,                                    /* @tp_repr@ */
1328   0,                                    /* @tp_as_number@ */
1329   0,                                    /* @tp_as_sequence@ */
1330   0,                                    /* @tp_as_mapping@ */
1331   0,                                    /* @tp_hash@ */
1332   0,                                    /* @tp_call@ */
1333   0,                                    /* @tp_str@ */
1334   0,                                    /* @tp_getattro@ */
1335   0,                                    /* @tp_setattro@ */
1336   0,                                    /* @tp_as_buffer@ */
1337   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1338     Py_TPFLAGS_BASETYPE,
1339
1340   /* @tp_doc@ */
1341 "Pseudorandom permutation metaclass.",
1342
1343   0,                                    /* @tp_traverse@ */
1344   0,                                    /* @tp_clear@ */
1345   0,                                    /* @tp_richcompare@ */
1346   0,                                    /* @tp_weaklistoffset@ */
1347   0,                                    /* @tp_iter@ */
1348   0,                                    /* @tp_iternext@ */
1349   0,                                    /* @tp_methods@ */
1350   0,                                    /* @tp_members@ */
1351   gcprp_pygetset,                       /* @tp_getset@ */
1352   0,                                    /* @tp_base@ */
1353   0,                                    /* @tp_dict@ */
1354   0,                                    /* @tp_descr_get@ */
1355   0,                                    /* @tp_descr_set@ */
1356   0,                                    /* @tp_dictoffset@ */
1357   0,                                    /* @tp_init@ */
1358   PyType_GenericAlloc,                  /* @tp_alloc@ */
1359   abstract_pynew,                       /* @tp_new@ */
1360   0,                                    /* @tp_free@ */
1361   0                                     /* @tp_is_gc@ */
1362 };
1363
1364 static PyTypeObject gprp_pytype_skel = {
1365   PyObject_HEAD_INIT(0) 0,              /* Header */
1366   "catacomb.GPRP",                      /* @tp_name@ */
1367   sizeof(gprp_pyobj),                   /* @tp_basicsize@ */
1368   0,                                    /* @tp_itemsize@ */
1369
1370   gprp_pydealloc,                       /* @tp_dealloc@ */
1371   0,                                    /* @tp_print@ */
1372   0,                                    /* @tp_getattr@ */
1373   0,                                    /* @tp_setattr@ */
1374   0,                                    /* @tp_compare@ */
1375   0,                                    /* @tp_repr@ */
1376   0,                                    /* @tp_as_number@ */
1377   0,                                    /* @tp_as_sequence@ */
1378   0,                                    /* @tp_as_mapping@ */
1379   0,                                    /* @tp_hash@ */
1380   0,                                    /* @tp_call@ */
1381   0,                                    /* @tp_str@ */
1382   0,                                    /* @tp_getattro@ */
1383   0,                                    /* @tp_setattro@ */
1384   0,                                    /* @tp_as_buffer@ */
1385   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
1386     Py_TPFLAGS_BASETYPE,
1387
1388   /* @tp_doc@ */
1389 "Pseudorandom permutation, abstract base class.",
1390
1391   0,                                    /* @tp_traverse@ */
1392   0,                                    /* @tp_clear@ */
1393   0,                                    /* @tp_richcompare@ */
1394   0,                                    /* @tp_weaklistoffset@ */
1395   0,                                    /* @tp_iter@ */
1396   0,                                    /* @tp_iternext@ */
1397   gprp_pymethods,                       /* @tp_methods@ */
1398   0,                                    /* @tp_members@ */
1399   0,                                    /* @tp_getset@ */
1400   0,                                    /* @tp_base@ */
1401   0,                                    /* @tp_dict@ */
1402   0,                                    /* @tp_descr_get@ */
1403   0,                                    /* @tp_descr_set@ */
1404   0,                                    /* @tp_dictoffset@ */
1405   0,                                    /* @tp_init@ */
1406   PyType_GenericAlloc,                  /* @tp_alloc@ */
1407   abstract_pynew,                       /* @tp_new@ */
1408   0,                                    /* @tp_free@ */
1409   0                                     /* @tp_is_gc@ */
1410 };
1411
1412 /*----- Main code ---------------------------------------------------------*/
1413
1414 void algorithms_pyinit(void)
1415 {
1416   INITTYPE(keysz, root);
1417   INITTYPE(keyszany, keysz);
1418   INITTYPE(keyszrange, keysz);
1419   INITTYPE(keyszset, keysz);
1420   INITTYPE(gccipher, type);
1421   INITTYPE(gcipher, root);
1422   INITTYPE(gchash, type);
1423   INITTYPE(ghash, root);
1424   INITTYPE(gcmac, type);
1425   INITTYPE(gmac, type);
1426   INITTYPE(gmhash, ghash);
1427   INITTYPE(gcprp, type);
1428   INITTYPE(gprp, root);
1429 }
1430
1431 GEN(gcciphers, cipher)
1432 GEN(gchashes, hash)
1433 GEN(gcmacs, mac)
1434 #define gcprp prpinfo
1435 GEN(gcprps, prp)
1436
1437 void algorithms_pyinsert(PyObject *mod)
1438 {
1439   PyObject *d;
1440   INSERT("KeySZ", keysz_pytype);
1441   INSERT("KeySZAny", keyszany_pytype);
1442   INSERT("KeySZRange", keyszrange_pytype);
1443   INSERT("KeySZSet", keyszset_pytype);
1444   INSERT("GCCipher", gccipher_pytype);
1445   INSERT("GCipher", gcipher_pytype);
1446   INSERT("gcciphers", gcciphers());
1447   INSERT("GCHash", gchash_pytype);
1448   INSERT("GHash", ghash_pytype);
1449   INSERT("gchashes", d = gchashes());
1450   sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
1451   has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
1452   INSERT("GCMAC", gcmac_pytype);
1453   INSERT("GMAC", gmac_pytype);
1454   INSERT("GMACHash", gmhash_pytype);
1455   INSERT("gcmacs", gcmacs());
1456   INSERT("GCPRP", gcprp_pytype);
1457   INSERT("GPRP", gprp_pytype);
1458   INSERT("gcprps", gcprps());
1459 }
1460
1461 /*----- That's all, folks -------------------------------------------------*/