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algorithms.c: Set `KSZ.max' to `None' to indicate no bound.
[catacomb-python] / algorithms.c
1 /* -*-c-*-
2 *
3 * Symmetric cryptography
4 *
5 * (c) 2004 Straylight/Edgeware
6 */
7
8 /*----- Licensing notice --------------------------------------------------*
9 *
10 * This file is part of the Python interface to Catacomb.
11 *
12 * Catacomb/Python is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * Catacomb/Python is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with Catacomb/Python; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 */
26
27 /*----- Header files ------------------------------------------------------*/
28
29 #include "catacomb-python.h"
30 PUBLIC_SYMBOLS;
31 #include "algorithms.h"
32 PRIVATE_SYMBOLS;
33
34 /*----- Key sizes ---------------------------------------------------------*/
35
36 static PyTypeObject *keysz_pytype;
37 static PyTypeObject *keyszany_pytype, *keyszrange_pytype, *keyszset_pytype;
38
39 typedef struct keysz_pyobj {
40 PyObject_HEAD
41 int dfl;
42 } keysz_pyobj;
43
44 typedef struct keyszrange_pyobj {
45 PyObject_HEAD
46 int dfl;
47 int min, max, mod;
48 } keyszrange_pyobj;
49
50 typedef struct keyszset_pyobj {
51 PyObject_HEAD
52 int dfl;
53 PyObject *set;
54 } keyszset_pyobj;
55
56 #define KEYSZ_PYCHECK(o) PyObject_TypeCheck((o), keysz_pytype)
57
58 #ifndef KSZ_OPMASK
59 # define KSZ_OPMASK 0x1f
60 #endif
61
62 #ifndef KSZ_16BIT
63 # define KSZ_16BIT 0x20
64 #endif
65
66 PyObject *keysz_pywrap(const octet *k)
67 {
68 unsigned op = *k++;
69 #define ARG(i) (op&KSZ_16BIT ? LOAD16(k + 2*(i)) : k[i])
70 switch (op&KSZ_OPMASK) {
71 case KSZ_ANY: {
72 keysz_pyobj *o = PyObject_New(keysz_pyobj, keyszany_pytype);
73 o->dfl = ARG(0);
74 return ((PyObject *)o);
75 } break;
76 case KSZ_RANGE: {
77 keyszrange_pyobj *o =
78 PyObject_New(keyszrange_pyobj, keyszrange_pytype);
79 o->dfl = ARG(0);
80 o->min = ARG(1);
81 o->max = ARG(2);
82 o->mod = ARG(3);
83 if (!o->mod) o->mod = 1;
84 return ((PyObject *)o);
85 } break;
86 case KSZ_SET: {
87 keyszset_pyobj *o =
88 PyObject_New(keyszset_pyobj, keyszset_pytype);
89 int i, n;
90 o->dfl = ARG(0);
91 for (i = 0; ARG(i); i++) ;
92 n = i; o->set = PyTuple_New(n);
93 for (i = 0; i < n; i++)
94 PyTuple_SET_ITEM(o->set, i, PyInt_FromLong(ARG(i)));
95 return ((PyObject *)o);
96 } break;
97 default:
98 abort();
99 }
100 #undef ARG
101 }
102
103 static PyObject *keyszany_pynew(PyTypeObject *ty,
104 PyObject *arg, PyObject *kw)
105 {
106 static const char *const kwlist[] = { "default", 0 };
107 int dfl;
108 keysz_pyobj *o;
109
110 if (!PyArg_ParseTupleAndKeywords(arg, kw, "i:new", KWLIST, &dfl))
111 goto end;
112 if (dfl < 0) VALERR("key size cannot be negative");
113 o = (keysz_pyobj *)ty->tp_alloc(ty, 0);
114 o->dfl = dfl;
115 return ((PyObject *)o);
116 end:
117 return (0);
118 }
119
120 static PyObject *keyszrange_pynew(PyTypeObject *ty,
121 PyObject *arg, PyObject *kw)
122 {
123 static const char *const kwlist[] = { "default", "min", "max", "mod", 0 };
124 int dfl, min = 0, max, mod = 1;
125 PyObject *maxobj = Py_None;
126 keyszrange_pyobj *o;
127
128 if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iOi:new", KWLIST,
129 &dfl, &min, &maxobj, &mod))
130 goto end;
131 if (maxobj == Py_None)
132 max = 0;
133 else {
134 max = PyInt_AsLong(maxobj);
135 if (max == -1 && PyErr_Occurred()) goto end;
136 }
137 if (dfl < 0 || min < 0 || max < 0) VALERR("key size cannot be negative");
138 if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
139 if (mod <= 0 || dfl%mod || min%mod || max%mod)
140 VALERR("bad key size modulus");
141 o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
142 o->dfl = dfl;
143 o->min = min;
144 o->max = max;
145 o->mod = mod;
146 return ((PyObject *)o);
147 end:
148 return (0);
149 }
150
151 static PyObject *keyszset_pynew(PyTypeObject *ty,
152 PyObject *arg, PyObject *kw)
153 {
154 static const char *const kwlist[] = { "default", "set", 0 };
155 int dfl, i, n, xx;
156 PyObject *set = 0;
157 PyObject *x = 0, *l = 0;
158 keyszset_pyobj *o = 0;
159
160 if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
161 goto end;
162 if (!set) set = PyTuple_New(0);
163 else Py_INCREF(set);
164 if (!PySequence_Check(set)) TYERR("want a sequence");
165 n = PySequence_Size(set); if (n < 0) 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);
169 PyList_Append(l, x);
170 Py_DECREF(x);
171 x = 0;
172 for (i = 0; i < n; i++) {
173 if ((x = PySequence_GetItem(set, i)) == 0) goto end;
174 xx = PyInt_AsLong(x);
175 if (PyErr_Occurred()) goto end;
176 if (xx == dfl) continue;
177 if (xx < 0) VALERR("key size cannot be negative");
178 PyList_Append(l, x);
179 Py_DECREF(x);
180 x = 0;
181 }
182 Py_DECREF(set);
183 if ((set = PySequence_Tuple(l)) == 0) goto end;
184 o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
185 o->dfl = dfl;
186 o->set = set;
187 Py_INCREF(set);
188 end:
189 Py_XDECREF(set);
190 Py_XDECREF(l);
191 Py_XDECREF(x);
192 return ((PyObject *)o);
193 }
194
195 static PyObject *kaget_min(PyObject *me, void *hunoz)
196 { return (PyInt_FromLong(0)); }
197 static PyObject *kaget_max(PyObject *me, void *hunoz)
198 { RETURN_NONE; }
199
200 static PyObject *krget_max(PyObject *me, void *hunoz)
201 {
202 int max = ((keyszrange_pyobj *)me)->max;
203 if (max) return (PyInt_FromLong(max));
204 else RETURN_NONE;
205 }
206
207 static PyObject *ksget_min(PyObject *me, void *hunoz)
208 {
209 PyObject *set = ((keyszset_pyobj *)me)->set;
210 int i, n, y, x = -1;
211 n = PyTuple_GET_SIZE(set);
212 for (i = 0; i < n; i++) {
213 y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
214 if (x == -1 || y < x) x = y;
215 }
216 return (PyInt_FromLong(x));
217 }
218
219 static PyObject *ksget_max(PyObject *me, void *hunoz)
220 {
221 PyObject *set = ((keyszset_pyobj *)me)->set;
222 int i, n, y, x = -1;
223 n = PyTuple_GET_SIZE(set);
224 for (i = 0; i < n; i++) {
225 y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
226 if (y > x) x = y;
227 }
228 return (PyInt_FromLong(x));
229 }
230
231 static const PyMemberDef keysz_pymembers[] = {
232 #define MEMBERSTRUCT keysz_pyobj
233 MEMRNM(default, T_INT, dfl, READONLY, "KSZ.default -> default key size")
234 #undef MEMBERSTRUCT
235 { 0 }
236 };
237
238 #define KSZCONVOP(op) \
239 static PyObject *kszmeth_##op(PyObject *me, PyObject *arg) \
240 { \
241 double x, y; \
242 if (!PyArg_ParseTuple(arg, "d:" #op, &x)) return (0); \
243 y = keysz_##op(x); \
244 return (PyFloat_FromDouble(y)); \
245 }
246 KSZCONVOP(fromdl)
247 KSZCONVOP(fromschnorr)
248 KSZCONVOP(fromif)
249 KSZCONVOP(fromec)
250 KSZCONVOP(todl)
251 KSZCONVOP(toschnorr)
252 KSZCONVOP(toif)
253 KSZCONVOP(toec)
254 #undef KSZCONVOP
255
256 static const PyMethodDef keysz_pymethods[] = {
257 #define METHNAME(name) kszmeth_##name
258 SMTH (fromdl, "fromdl(N) -> M: "
259 "convert integer discrete log field size to work factor")
260 SMTH (fromschnorr, "fromschnorr(N) -> M: "
261 "convert Schnorr group order to work factor")
262 SMTH (fromif, "fromif(N) -> M: "
263 "convert integer factorization problem size to work factor")
264 SMTH (fromec, "fromec(N) -> M: "
265 "convert elliptic curve group order to work factor")
266 SMTH (todl, "todl(N) -> M: "
267 "convert work factor to integer discrete log field size")
268 SMTH (toschnorr, "toschnorr(N) -> M: "
269 "convert work factor to Schnorr group order")
270 SMTH (toif, "toif(N) -> M: "
271 "convert work factor to integer factorization problem size")
272 SMTH (toec, "toec(N) -> M: "
273 "convert work factor to elliptic curve group order")
274 SMTH (toec, "toec(N) -> M: "
275 "convert work factor to elliptic curve group order")
276 #undef METHNAME
277 { 0 }
278 };
279
280 static const PyGetSetDef keyszany_pygetset[] = {
281 #define GETSETNAME(op, name) ka##op##_##name
282 GET (min, "KSZ.min -> smallest allowed key size")
283 GET (max, "KSZ.max -> largest allowed key size")
284 #undef GETSETNAME
285 { 0 }
286 };
287
288 static const PyMemberDef keyszrange_pymembers[] = {
289 #define MEMBERSTRUCT keyszrange_pyobj
290 MEMBER(min, T_INT, READONLY, "KSZ.min -> smallest allowed key size")
291 MEMBER(mod, T_INT, READONLY,
292 "KSZ.mod -> key size must be a multiple of this")
293 #undef MEMBERSTRUCT
294 { 0 }
295 };
296
297 static const PyGetSetDef keyszrange_pygetset[] = {
298 #define GETSETNAME(op, name) kr##op##_##name
299 GET (max, "KSZ.max -> largest allowed key size")
300 #undef GETSETNAME
301 { 0 }
302 };
303
304 static const PyGetSetDef keyszset_pygetset[] = {
305 #define GETSETNAME(op, name) ks##op##_##name
306 GET (min, "KSZ.min -> smallest allowed key size")
307 GET (max, "KSZ.max -> largest allowed key size")
308 #undef GETSETNAME
309 { 0 }
310 };
311
312 static const PyMemberDef keyszset_pymembers[] = {
313 #define MEMBERSTRUCT keyszset_pyobj
314 MEMBER(set, T_OBJECT, READONLY, "KSZ.set -> allowed key sizes")
315 #undef MEMBERSTRUCT
316 { 0 }
317 };
318
319 static const PyTypeObject keysz_pytype_skel = {
320 PyVarObject_HEAD_INIT(0, 0) /* Header */
321 "KeySZ", /* @tp_name@ */
322 sizeof(keysz_pyobj), /* @tp_basicsize@ */
323 0, /* @tp_itemsize@ */
324
325 0, /* @tp_dealloc@ */
326 0, /* @tp_print@ */
327 0, /* @tp_getattr@ */
328 0, /* @tp_setattr@ */
329 0, /* @tp_compare@ */
330 0, /* @tp_repr@ */
331 0, /* @tp_as_number@ */
332 0, /* @tp_as_sequence@ */
333 0, /* @tp_as_mapping@ */
334 0, /* @tp_hash@ */
335 0, /* @tp_call@ */
336 0, /* @tp_str@ */
337 0, /* @tp_getattro@ */
338 0, /* @tp_setattro@ */
339 0, /* @tp_as_buffer@ */
340 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
341 Py_TPFLAGS_BASETYPE,
342
343 /* @tp_doc@ */
344 "Key size constraints. Abstract.",
345
346 0, /* @tp_traverse@ */
347 0, /* @tp_clear@ */
348 0, /* @tp_richcompare@ */
349 0, /* @tp_weaklistoffset@ */
350 0, /* @tp_iter@ */
351 0, /* @tp_iternext@ */
352 PYMETHODS(keysz), /* @tp_methods@ */
353 PYMEMBERS(keysz), /* @tp_members@ */
354 0, /* @tp_getset@ */
355 0, /* @tp_base@ */
356 0, /* @tp_dict@ */
357 0, /* @tp_descr_get@ */
358 0, /* @tp_descr_set@ */
359 0, /* @tp_dictoffset@ */
360 0, /* @tp_init@ */
361 PyType_GenericAlloc, /* @tp_alloc@ */
362 abstract_pynew, /* @tp_new@ */
363 0, /* @tp_free@ */
364 0 /* @tp_is_gc@ */
365 };
366
367 static const PyTypeObject keyszany_pytype_skel = {
368 PyVarObject_HEAD_INIT(0, 0) /* Header */
369 "KeySZAny", /* @tp_name@ */
370 sizeof(keysz_pyobj), /* @tp_basicsize@ */
371 0, /* @tp_itemsize@ */
372
373 0, /* @tp_dealloc@ */
374 0, /* @tp_print@ */
375 0, /* @tp_getattr@ */
376 0, /* @tp_setattr@ */
377 0, /* @tp_compare@ */
378 0, /* @tp_repr@ */
379 0, /* @tp_as_number@ */
380 0, /* @tp_as_sequence@ */
381 0, /* @tp_as_mapping@ */
382 0, /* @tp_hash@ */
383 0, /* @tp_call@ */
384 0, /* @tp_str@ */
385 0, /* @tp_getattro@ */
386 0, /* @tp_setattro@ */
387 0, /* @tp_as_buffer@ */
388 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
389 Py_TPFLAGS_BASETYPE,
390
391 /* @tp_doc@ */
392 "KeySZAny(DEFAULT)\n"
393 " Key size constraints. This object imposes no constraints on size.",
394
395 0, /* @tp_traverse@ */
396 0, /* @tp_clear@ */
397 0, /* @tp_richcompare@ */
398 0, /* @tp_weaklistoffset@ */
399 0, /* @tp_iter@ */
400 0, /* @tp_iternext@ */
401 0, /* @tp_methods@ */
402 0, /* @tp_members@ */
403 PYGETSET(keyszany), /* @tp_getset@ */
404 0, /* @tp_base@ */
405 0, /* @tp_dict@ */
406 0, /* @tp_descr_get@ */
407 0, /* @tp_descr_set@ */
408 0, /* @tp_dictoffset@ */
409 0, /* @tp_init@ */
410 PyType_GenericAlloc, /* @tp_alloc@ */
411 keyszany_pynew, /* @tp_new@ */
412 0, /* @tp_free@ */
413 0 /* @tp_is_gc@ */
414 };
415
416 static const PyTypeObject keyszrange_pytype_skel = {
417 PyVarObject_HEAD_INIT(0, 0) /* Header */
418 "KeySZRange", /* @tp_name@ */
419 sizeof(keyszrange_pyobj), /* @tp_basicsize@ */
420 0, /* @tp_itemsize@ */
421
422 0, /* @tp_dealloc@ */
423 0, /* @tp_print@ */
424 0, /* @tp_getattr@ */
425 0, /* @tp_setattr@ */
426 0, /* @tp_compare@ */
427 0, /* @tp_repr@ */
428 0, /* @tp_as_number@ */
429 0, /* @tp_as_sequence@ */
430 0, /* @tp_as_mapping@ */
431 0, /* @tp_hash@ */
432 0, /* @tp_call@ */
433 0, /* @tp_str@ */
434 0, /* @tp_getattro@ */
435 0, /* @tp_setattro@ */
436 0, /* @tp_as_buffer@ */
437 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
438 Py_TPFLAGS_BASETYPE,
439
440 /* @tp_doc@ */
441 "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n"
442 " Key size constraints: size must be between MIN and MAX inclusive, and\n"
443 " be a multiple of MOD.",
444
445 0, /* @tp_traverse@ */
446 0, /* @tp_clear@ */
447 0, /* @tp_richcompare@ */
448 0, /* @tp_weaklistoffset@ */
449 0, /* @tp_iter@ */
450 0, /* @tp_iternext@ */
451 0, /* @tp_methods@ */
452 PYMEMBERS(keyszrange), /* @tp_members@ */
453 PYGETSET(keyszrange), /* @tp_getset@ */
454 0, /* @tp_base@ */
455 0, /* @tp_dict@ */
456 0, /* @tp_descr_get@ */
457 0, /* @tp_descr_set@ */
458 0, /* @tp_dictoffset@ */
459 0, /* @tp_init@ */
460 PyType_GenericAlloc, /* @tp_alloc@ */
461 keyszrange_pynew, /* @tp_new@ */
462 0, /* @tp_free@ */
463 0 /* @tp_is_gc@ */
464 };
465
466 static const PyTypeObject keyszset_pytype_skel = {
467 PyVarObject_HEAD_INIT(0, 0) /* Header */
468 "KeySZSet", /* @tp_name@ */
469 sizeof(keyszset_pyobj), /* @tp_basicsize@ */
470 0, /* @tp_itemsize@ */
471
472 0, /* @tp_dealloc@ */
473 0, /* @tp_print@ */
474 0, /* @tp_getattr@ */
475 0, /* @tp_setattr@ */
476 0, /* @tp_compare@ */
477 0, /* @tp_repr@ */
478 0, /* @tp_as_number@ */
479 0, /* @tp_as_sequence@ */
480 0, /* @tp_as_mapping@ */
481 0, /* @tp_hash@ */
482 0, /* @tp_call@ */
483 0, /* @tp_str@ */
484 0, /* @tp_getattro@ */
485 0, /* @tp_setattro@ */
486 0, /* @tp_as_buffer@ */
487 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
488 Py_TPFLAGS_BASETYPE,
489
490 /* @tp_doc@ */
491 "KeySZSet(DEFAULT, SEQ)\n"
492 " Key size constraints: size must be DEFAULT or an element of SEQ.",
493
494 0, /* @tp_traverse@ */
495 0, /* @tp_clear@ */
496 0, /* @tp_richcompare@ */
497 0, /* @tp_weaklistoffset@ */
498 0, /* @tp_iter@ */
499 0, /* @tp_iternext@ */
500 0, /* @tp_methods@ */
501 PYMEMBERS(keyszset), /* @tp_members@ */
502 PYGETSET(keyszset), /* @tp_getset@ */
503 0, /* @tp_base@ */
504 0, /* @tp_dict@ */
505 0, /* @tp_descr_get@ */
506 0, /* @tp_descr_set@ */
507 0, /* @tp_dictoffset@ */
508 0, /* @tp_init@ */
509 PyType_GenericAlloc, /* @tp_alloc@ */
510 keyszset_pynew, /* @tp_new@ */
511 0, /* @tp_free@ */
512 0 /* @tp_is_gc@ */
513 };
514
515 /*----- Symmetric encryption ----------------------------------------------*/
516
517 static PyTypeObject *gccipher_pytype, *gcipher_pytype;
518
519 typedef struct gccipher_pyobj {
520 PyHeapTypeObject ty;
521 gccipher *cc;
522 } gccipher_pyobj;
523
524 #define GCCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gccipher_pytype)
525 #define GCCIPHER_CC(o) (((gccipher_pyobj *)(o))->cc)
526
527 typedef struct gcipher_pyobj {
528 PyObject_HEAD
529 gcipher *c;
530 } gcipher_pyobj;
531
532 #define GCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gcipher_pytype)
533 #define GCIPHER_C(o) (((gcipher_pyobj *)(o))->c)
534
535 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
536
537 static PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
538 {
539 gcipher_pyobj *g;
540 if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
541 else Py_INCREF(cobj);
542 g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
543 g->c = c;
544 return ((PyObject *)g);
545 }
546
547 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
548 {
549 static const char *const kwlist[] = { "k", 0 };
550 struct bin k;
551
552 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
553 goto end;
554 if (keysz(k.sz, GCCIPHER_CC(ty)->keysz) != k.sz) VALERR("bad key length");
555 return (gcipher_pywrap((PyObject *)ty,
556 GC_INIT(GCCIPHER_CC(ty), k.p, k.sz)));
557 end:
558 return (0);
559 }
560
561 PyObject *gccipher_pywrap(gccipher *cc)
562 {
563 gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
564 g->cc = cc;
565 g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
566 g->ty.ht_type.tp_base = gcipher_pytype;
567 Py_INCREF(gcipher_pytype);
568 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
569 Py_TPFLAGS_BASETYPE |
570 Py_TPFLAGS_HEAPTYPE);
571 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
572 g->ty.ht_type.tp_free = 0;
573 g->ty.ht_type.tp_new = gcipher_pynew;
574 typeready(&g->ty.ht_type);
575 return ((PyObject *)g);
576 }
577
578 static void gcipher_pydealloc(PyObject *me)
579 {
580 GC_DESTROY(GCIPHER_C(me));
581 Py_DECREF(Py_TYPE(me));
582 FREEOBJ(me);
583 }
584
585 static PyObject *gccget_name(PyObject *me, void *hunoz)
586 { return (TEXT_FROMSTR(GCCIPHER_CC(me)->name)); }
587
588 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
589 { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
590
591 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
592 { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
593
594 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
595 {
596 struct bin m;
597 PyObject *rc = 0;
598
599 if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) return (0);
600 rc = bytestring_pywrap(0, m.sz);
601 GC_ENCRYPT(GCIPHER_C(me), m.p, BIN_PTR(rc), m.sz);
602 return (rc);
603 }
604
605 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
606 {
607 char *p;
608 int sz;
609 PyObject *rc = 0;
610
611 if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
612 rc = bytestring_pywrap(0, sz);
613 p = BIN_PTR(rc);
614 memset(p, 0, sz);
615 GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
616 return (rc);
617 }
618
619 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
620 {
621 struct bin c;
622 PyObject *rc = 0;
623
624 if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) return (0);
625 rc = bytestring_pywrap(0, c.sz);
626 GC_DECRYPT(GCIPHER_C(me), c.p, BIN_PTR(rc), c.sz);
627 return (rc);
628 }
629
630 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
631 {
632 char *p;
633 int sz;
634 PyObject *rc = 0;
635
636 if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
637 rc = bytestring_pywrap(0, sz);
638 p = BIN_PTR(rc);
639 memset(p, 0, sz);
640 GC_DECRYPT(GCIPHER_C(me), p, p, sz);
641 return (rc);
642 }
643
644 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
645 {
646 struct bin iv;
647
648 if (!PyArg_ParseTuple(arg, "O&:setiv", convbin, &iv)) goto end;
649 if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
650 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
651 if (iv.sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
652 GC_SETIV(GCIPHER_C(me), iv.p);
653 RETURN_ME;
654 end:
655 return (0);
656 }
657
658 static PyObject *gcmeth_bdry(PyObject *me)
659 {
660 if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
661 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
662 GC_BDRY(GCIPHER_C(me));
663 RETURN_ME;
664 end:
665 return (0);
666 }
667
668 static const PyGetSetDef gccipher_pygetset[] = {
669 #define GETSETNAME(op, name) gcc##op##_##name
670 GET (keysz, "CC.keysz -> acceptable key sizes")
671 GET (blksz, "CC.blksz -> block size, or zero")
672 GET (name, "CC.name -> name of this kind of cipher")
673 #undef GETSETNAME
674 { 0 }
675 };
676
677 static const PyMethodDef gcipher_pymethods[] = {
678 #define METHNAME(name) gcmeth_##name
679 METH (encrypt, "C.encrypt(PT) -> CT")
680 METH (enczero, "C.enczero(N) -> CT")
681 METH (decrypt, "C.decrypt(CT) -> PT")
682 METH (deczero, "C.deczero(N) -> PT")
683 METH (setiv, "C.setiv(IV)")
684 NAMETH(bdry, "C.bdry()")
685 #undef METHNAME
686 { 0 }
687 };
688
689 static const PyTypeObject gccipher_pytype_skel = {
690 PyVarObject_HEAD_INIT(0, 0) /* Header */
691 "GCCipher", /* @tp_name@ */
692 sizeof(gccipher_pyobj), /* @tp_basicsize@ */
693 0, /* @tp_itemsize@ */
694
695 0, /* @tp_dealloc@ */
696 0, /* @tp_print@ */
697 0, /* @tp_getattr@ */
698 0, /* @tp_setattr@ */
699 0, /* @tp_compare@ */
700 0, /* @tp_repr@ */
701 0, /* @tp_as_number@ */
702 0, /* @tp_as_sequence@ */
703 0, /* @tp_as_mapping@ */
704 0, /* @tp_hash@ */
705 0, /* @tp_call@ */
706 0, /* @tp_str@ */
707 0, /* @tp_getattro@ */
708 0, /* @tp_setattro@ */
709 0, /* @tp_as_buffer@ */
710 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
711 Py_TPFLAGS_BASETYPE,
712
713 /* @tp_doc@ */
714 "Symmetric cipher metaclass.",
715
716 0, /* @tp_traverse@ */
717 0, /* @tp_clear@ */
718 0, /* @tp_richcompare@ */
719 0, /* @tp_weaklistoffset@ */
720 0, /* @tp_iter@ */
721 0, /* @tp_iternext@ */
722 0, /* @tp_methods@ */
723 0, /* @tp_members@ */
724 PYGETSET(gccipher), /* @tp_getset@ */
725 0, /* @tp_base@ */
726 0, /* @tp_dict@ */
727 0, /* @tp_descr_get@ */
728 0, /* @tp_descr_set@ */
729 0, /* @tp_dictoffset@ */
730 0, /* @tp_init@ */
731 PyType_GenericAlloc, /* @tp_alloc@ */
732 abstract_pynew, /* @tp_new@ */
733 0, /* @tp_free@ */
734 0 /* @tp_is_gc@ */
735 };
736
737 static const PyTypeObject gcipher_pytype_skel = {
738 PyVarObject_HEAD_INIT(0, 0) /* Header */
739 "GCipher", /* @tp_name@ */
740 sizeof(gcipher_pyobj), /* @tp_basicsize@ */
741 0, /* @tp_itemsize@ */
742
743 gcipher_pydealloc, /* @tp_dealloc@ */
744 0, /* @tp_print@ */
745 0, /* @tp_getattr@ */
746 0, /* @tp_setattr@ */
747 0, /* @tp_compare@ */
748 0, /* @tp_repr@ */
749 0, /* @tp_as_number@ */
750 0, /* @tp_as_sequence@ */
751 0, /* @tp_as_mapping@ */
752 0, /* @tp_hash@ */
753 0, /* @tp_call@ */
754 0, /* @tp_str@ */
755 0, /* @tp_getattro@ */
756 0, /* @tp_setattro@ */
757 0, /* @tp_as_buffer@ */
758 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
759 Py_TPFLAGS_BASETYPE,
760
761 /* @tp_doc@ */
762 "Symmetric cipher, abstract base class.",
763
764 0, /* @tp_traverse@ */
765 0, /* @tp_clear@ */
766 0, /* @tp_richcompare@ */
767 0, /* @tp_weaklistoffset@ */
768 0, /* @tp_iter@ */
769 0, /* @tp_iternext@ */
770 PYMETHODS(gcipher), /* @tp_methods@ */
771 0, /* @tp_members@ */
772 0, /* @tp_getset@ */
773 0, /* @tp_base@ */
774 0, /* @tp_dict@ */
775 0, /* @tp_descr_get@ */
776 0, /* @tp_descr_set@ */
777 0, /* @tp_dictoffset@ */
778 0, /* @tp_init@ */
779 PyType_GenericAlloc, /* @tp_alloc@ */
780 abstract_pynew, /* @tp_new@ */
781 0, /* @tp_free@ */
782 0 /* @tp_is_gc@ */
783 };
784
785 /*----- Authenticated encryption ------------------------------------------*/
786
787 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
788 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
789 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
790 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
791
792 typedef struct gcaead_pyobj {
793 PyHeapTypeObject ty;
794 gcaead *aec;
795 struct gcaeadaad_pyobj *aad;
796 struct gcaeadenc_pyobj *enc;
797 struct gcaeaddec_pyobj *dec;
798 } gcaead_pyobj;
799
800 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
801 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
802 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
803 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
804 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
805 static PyObject *gcaead_pywrap(gcaead *);
806
807 typedef struct gaeadkey_pyobj {
808 PyObject_HEAD
809 gaead_key *k;
810 } gaeadkey_pyobj;
811
812 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
813 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
814
815 typedef struct gcaeadaad_pyobj {
816 PyHeapTypeObject ty;
817 gcaead_pyobj *key;
818 } gcaeadaad_pyobj;
819
820 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
821 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
822
823 typedef struct gaeadaad_pyobj {
824 PyObject_HEAD
825 gaead_aad *a;
826 unsigned f;
827 #define AEADF_DEAD 32768u
828 size_t hsz, hlen;
829 } gaeadaad_pyobj;
830
831 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
832 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
833 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
834 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
835 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
836
837 typedef struct gcaeadenc_pyobj {
838 PyHeapTypeObject ty;
839 gcaead_pyobj *key;
840 } gcaeadenc_pyobj;
841
842 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
843 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
844 size_t, size_t, size_t);
845
846 typedef struct gaeadenc_pyobj {
847 PyObject_HEAD
848 gaead_enc *e;
849 gaeadaad_pyobj *aad;
850 unsigned f;
851 size_t hsz, msz, tsz;
852 size_t mlen;
853 } gaeadenc_pyobj;
854
855 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
856 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
857 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
858 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
859 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
860 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
861 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
862 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
863
864 typedef struct gcaeaddec_pyobj {
865 PyHeapTypeObject ty;
866 gcaead_pyobj *key;
867 } gcaeaddec_pyobj;
868
869 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
870 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
871 size_t, size_t, size_t);
872
873 typedef struct gaeaddec_pyobj {
874 PyObject_HEAD
875 gaead_dec *d;
876 gaeadaad_pyobj *aad;
877 unsigned f;
878 size_t hsz, csz, tsz;
879 size_t clen;
880 } gaeaddec_pyobj;
881
882 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
883 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
884 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
885 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
886 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
887 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
888 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
889 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
890
891 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
892 {
893 gaeadkey_pyobj *gk;
894
895 if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
896 else Py_INCREF(cobj);
897 gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
898 gk->k = k;
899 return ((PyObject *)gk);
900 }
901
902 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
903 PyObject *arg, PyObject *kw)
904 {
905 static const char *const kwlist[] = { "k", 0 };
906 struct bin k;
907
908 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
909 goto end;
910 if (keysz(k.sz, GCAEAD_AEC(ty)->keysz) != k.sz) VALERR("bad key length");
911 return (gaeadkey_pywrap((PyObject *)ty,
912 GAEAD_KEY(GCAEAD_AEC(ty), k.p, k.sz)));
913 end:
914 return (0);
915 }
916
917 static PyObject *gcaead_pywrap(gcaead *aec)
918 {
919 gcaead_pyobj *gck;
920 gcaeadaad_pyobj *gca;
921 gcaeadenc_pyobj *gce;
922 gcaeaddec_pyobj *gcd;
923
924 #define MKTYPE(obj, thing, newfn, namefmt) do { \
925 (obj) = newtype(gcaead_pytype, 0, 0); \
926 (obj)->ty.ht_name = TEXT_FORMAT(namefmt, aec->name); \
927 (obj)->ty.ht_type.tp_name = TEXT_PTR((obj)->ty.ht_name); \
928 (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj); \
929 (obj)->ty.ht_type.tp_base = gaead##thing##_pytype; \
930 Py_INCREF(gaead##thing##_pytype); \
931 (obj)->ty.ht_type.tp_flags = \
932 (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE); \
933 (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc; \
934 (obj)->ty.ht_type.tp_free = 0; \
935 (obj)->ty.ht_type.tp_new = newfn; \
936 typeready(&(obj)->ty.ht_type); \
937 } while (0)
938
939 MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
940 MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
941 MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
942 MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
943
944 #undef MKTYPE
945
946 gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
947 gca->key = gce->key = gcd->key = gck;
948 return ((PyObject *)gck);
949 }
950
951 static void gaeadkey_pydealloc(PyObject *me)
952 { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
953
954 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
955 { return (TEXT_FROMSTR(GCAEAD_AEC(me)->name)); }
956
957 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
958 { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
959
960 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
961 { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
962
963 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
964 { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
965
966 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
967 { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
968
969 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
970 { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
971
972 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
973 { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
974
975 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
976 { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
977
978 static const PyGetSetDef gcaead_pygetset[] = {
979 #define GETSETNAME(op, name) gcae##op##_##name
980 GET (keysz, "AEC.keysz -> acceptable key sizes")
981 GET (noncesz, "AEC.noncesz -> acceptable nonce sizes")
982 GET (tagsz, "AEC.tagsz -> acceptable tag sizes")
983 GET (blksz, "AEC.blksz -> block size, or zero")
984 GET (bufsz, "AEC.bufsz -> amount of data buffered internally")
985 GET (ohd, "AEC.ohd -> maximum encryption overhead")
986 GET (name, "AEC.name -> name of this kind of AEAD scheme")
987 GET (flags, "AEC.flags -> mask of `AEADF_...' flags")
988 #undef GETSETNAME
989 { 0 }
990 };
991
992 static PyObject *gaekmeth_aad(PyObject *me)
993 {
994 const gaead_key *k = GAEADKEY_K(me);
995 PyObject *rc = 0;
996
997 if (k->ops->c->f&AEADF_AADNDEP)
998 VALERR("aad must be associated with enc/dec op");
999 rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(Py_TYPE(me)),
1000 GAEAD_AAD(k), 0, 0);
1001 end:
1002 return (rc);
1003 }
1004
1005 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
1006 PyObject *hszobj, size_t *hsz_out,
1007 PyObject *mszobj, size_t *msz_out,
1008 PyObject *tszobj, size_t *tsz_out)
1009 {
1010 unsigned f = 0, miss;
1011 int rc = -1;
1012
1013 if (hszobj != Py_None)
1014 { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
1015 if (mszobj != Py_None)
1016 { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
1017 if (tszobj != Py_None)
1018 { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
1019 miss = aec->f&~f;
1020 if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1021 if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1022 if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1023 if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1024 if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1025 VALERR("bad tag length");
1026 *f_out = f | aec->f; rc = 0;
1027 end:
1028 return (rc);
1029 }
1030
1031 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1032 {
1033 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1034 const gaead_key *k = GAEADKEY_K(me);
1035 gaead_enc *e;
1036 PyObject *rc = 0;
1037 struct bin n;
1038 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1039 size_t hsz = 0, msz = 0, tsz = 0;
1040 unsigned f;
1041
1042 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1043 convbin, &n, &hszobj, &mszobj, &tszobj))
1044 goto end;
1045 if (check_aead_encdec(k->ops->c, &f, n.sz,
1046 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1047 goto end;
1048 e = GAEAD_ENC(GAEADKEY_K(me), n.p, n.sz, hsz, msz, tsz);
1049 if (!e) VALERR("bad aead parameter combination");
1050 rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(Py_TYPE(me)),
1051 e, f, hsz, msz, tsz);
1052 end:
1053 return (rc);
1054 }
1055
1056 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1057 {
1058 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1059 const gaead_key *k = GAEADKEY_K(me);
1060 gaead_dec *d;
1061 PyObject *rc = 0;
1062 struct bin n;
1063 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1064 size_t hsz = 0, csz = 0, tsz = 0;
1065 unsigned f;
1066
1067 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:dec", KWLIST,
1068 convbin, &n, &hszobj, &cszobj, &tszobj))
1069 goto end;
1070 if (check_aead_encdec(k->ops->c, &f, n.sz,
1071 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1072 goto end;
1073 d = GAEAD_DEC(GAEADKEY_K(me), n.p, n.sz, hsz, csz, tsz);
1074 if (!d) VALERR("bad aead parameter combination");
1075 rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(Py_TYPE(me)),
1076 d, f, hsz, csz, tsz);
1077 end:
1078 return (rc);
1079 }
1080
1081 static const PyMethodDef gaeadkey_pymethods[] = {
1082 #define METHNAME(name) gaekmeth_##name
1083 NAMETH(aad, "KEY.aad() -> AAD")
1084 KWMETH(enc, "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1085 KWMETH(dec, "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1086 #undef METHNAME
1087 { 0 }
1088 };
1089
1090 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1091 unsigned f, size_t hsz)
1092 {
1093 gaeadaad_pyobj *ga;
1094
1095 assert(cobj); Py_INCREF(cobj);
1096 ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1097 ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1098 return ((PyObject *)ga);
1099 }
1100
1101 static void gaeadaad_pydealloc(PyObject *me)
1102 {
1103 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1104
1105 if (ga->a) GAEAD_DESTROY(ga->a);
1106 Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1107 }
1108
1109 static int gaea_check(PyObject *me)
1110 {
1111 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1112 int rc = -1;
1113
1114 if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1115 rc = 0;
1116 end:
1117 return (rc);
1118 }
1119
1120 static void gaea_invalidate(gaeadaad_pyobj *ga)
1121 { if (ga) ga->f |= AEADF_DEAD; }
1122
1123 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1124 {
1125 gaeadaad_pyobj *ga = *ga_inout;
1126 if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1127 }
1128
1129 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1130 {
1131 if (gaea_check(me)) return (0);
1132 else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1133 else RETURN_NONE;
1134 }
1135
1136 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1137 { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1138
1139 static const PyGetSetDef gaeadaad_pygetset[] = {
1140 #define GETSETNAME(op, name) gaea##op##_##name
1141 GET (hsz, "AAD.hsz -> precommitted header length or `None'")
1142 GET (hlen, "AAD.hlen -> header length so far")
1143 #undef GETSETNAME
1144 { 0 }
1145 };
1146
1147 static PyObject *gaeameth_copy(PyObject *me)
1148 {
1149 PyObject *rc = 0;
1150
1151 if (gaea_check(me)) goto end;
1152 if (GAEADAAD_F(me)&AEADF_AADNDEP)
1153 VALERR("can't duplicate nonce-dependent aad");
1154 rc = gaeadaad_pywrap((PyObject *)Py_TYPE(me),
1155 GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1156 GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1157 end:
1158 return (rc);
1159 }
1160
1161 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1162 {
1163 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1164 int rc = -1;
1165
1166 if (gaea_check(me)) goto end;
1167 if ((ga->f&AEADF_NOAAD) && hsz)
1168 VALERR("header data not permitted");
1169 if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1170 VALERR("too large for precommitted header length");
1171 GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1172 rc = 0;
1173 end:
1174 return (rc);
1175 }
1176
1177 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1178 {
1179 struct bin h;
1180
1181 if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &h)) return (0);
1182 if (gaeadaad_hash(me, h.p, h.sz)) return (0);
1183 RETURN_ME;
1184 }
1185
1186 #define GAEAMETH_HASHU_(n, W, w) \
1187 static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg) \
1188 { \
1189 uint##n x; octet b[SZ_##W]; \
1190 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1191 STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0); \
1192 RETURN_ME; \
1193 }
1194 DOUINTCONV(GAEAMETH_HASHU_)
1195
1196 #define GAEAMETH_HASHBUF_(n, W, w) \
1197 static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg) \
1198 { \
1199 struct bin in; octet b[SZ_##W]; \
1200 if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
1201 if (in.sz > MASK##n) TYERR("string too long"); \
1202 STORE##W(b, in.sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end; \
1203 if (gaeadaad_hash(me, in.p, in.sz)) goto end; \
1204 RETURN_ME; \
1205 end: \
1206 return (0); \
1207 }
1208 DOUINTCONV(GAEAMETH_HASHBUF_)
1209
1210 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1211 {
1212 char *p;
1213 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1214 if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1215 RETURN_ME;
1216 }
1217
1218 static const PyMethodDef gaeadaad_pymethods[] = {
1219 #define METHNAME(name) gaeameth_##name
1220 NAMETH(copy, "AAD.copy() -> AAD'")
1221 METH (hash, "AAD.hash(H)")
1222 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1223 DOUINTCONV(METHU_)
1224 #undef METHU_
1225 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1226 DOUINTCONV(METHBUF_)
1227 #undef METHBUF_
1228 METH (hashstrz, "AAD.hashstrz(STRING)")
1229 #undef METHNAME
1230 { 0 }
1231 };
1232
1233 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1234 size_t hsz, size_t msz, size_t tsz)
1235 {
1236 gaeadenc_pyobj *ge;
1237
1238 assert(cobj); Py_INCREF(cobj);
1239 ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1240 ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1241 ge->aad = 0; ge->mlen = 0;
1242 return ((PyObject *)ge);
1243 }
1244
1245 static void gaeadenc_pydealloc(PyObject *me)
1246 {
1247 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1248
1249 gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1250 Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1251 }
1252
1253 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1254 {
1255 if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1256 else RETURN_NONE;
1257 }
1258
1259 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1260 {
1261 if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1262 else RETURN_NONE;
1263 }
1264
1265 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1266 {
1267 if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1268 else RETURN_NONE;
1269 }
1270
1271 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1272 { return getulong(GAEADENC_MLEN(me)); }
1273
1274 static const PyGetSetDef gaeadenc_pygetset[] = {
1275 #define GETSETNAME(op, name) gaee##op##_##name
1276 GET (hsz, "ENC.hsz -> precommitted header length or `None'")
1277 GET (msz, "ENC.msz -> precommitted message length or `None'")
1278 GET (tsz, "ENC.tsz -> precommitted tag length or `None'")
1279 GET (mlen, "ENC.mlen -> message length so far")
1280 #undef GETSETNAME
1281 { 0 }
1282 };
1283
1284 static PyObject *gaeemeth_aad(PyObject *me)
1285 {
1286 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1287 PyObject *rc = 0;
1288
1289 if (!(ge->f&AEADF_AADNDEP))
1290 rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1291 GAEAD_AAD(ge->e), 0, 0);
1292 else {
1293 if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1294 VALERR("too late for aad");
1295 if (!ge->aad)
1296 ge->aad = (gaeadaad_pyobj *)
1297 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(ge))->aad,
1298 GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1299 ge->hsz);
1300 Py_INCREF(ge->aad);
1301 rc = (PyObject *)ge->aad;
1302 }
1303 end:
1304 return (rc);
1305 }
1306
1307 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1308 {
1309 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1310 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1311 struct bin n;
1312 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1313 size_t hsz = 0, msz = 0, tsz = 0;
1314 unsigned f;
1315
1316 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1317 convbin, &n, &hszobj, &mszobj, &tszobj))
1318 goto end;
1319 if (check_aead_encdec(ge->e->ops->c, &f, n.sz,
1320 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1321 goto end;
1322 if (GAEAD_REINIT(ge->e, n.p, n.sz, hsz, msz, tsz))
1323 VALERR("bad aead parameter combination");
1324 gaea_sever(&ge->aad);
1325 ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1326 end:
1327 return (0);
1328 }
1329
1330 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1331 {
1332 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1333 struct bin m;
1334 char *c = 0; size_t csz; buf b;
1335 int err;
1336 PyObject *rc = 0;
1337
1338 if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
1339 if (ge->f&AEADF_AADFIRST) {
1340 if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1341 VALERR("header doesn't match precommitted length");
1342 gaea_invalidate(ge->aad);
1343 }
1344 if ((ge->f&AEADF_PCMSZ) && m.sz > ge->msz - ge->mlen)
1345 VALERR("too large for precommitted message length");
1346 csz = m.sz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1347 err = GAEAD_ENCRYPT(ge->e, m.p, m.sz, &b); assert(!err); (void)err;
1348 buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += m.sz;
1349 end:
1350 xfree(c);
1351 return (rc);
1352 }
1353
1354 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1355 {
1356 static const char *const kwlist[] = { "tsz", "aad", 0 };
1357 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1358 PyObject *aad = Py_None;
1359 char *c = 0; size_t csz; buf b;
1360 PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1361 int err;
1362 PyObject *rc = 0;
1363
1364 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1365 &tszobj, &aad))
1366 goto end;
1367 if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1368 if (aad != Py_None &&
1369 !PyObject_TypeCheck(aad,
1370 (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1371 TYERR("wanted aad");
1372 if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1373 VALERR("mismatched aad");
1374 if ((ge->f&AEADF_PCHSZ) &&
1375 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1376 VALERR("header doesn't match precommitted length");
1377 if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1378 VALERR("message doesn't match precommitted length");
1379 if (tszobj == Py_None) {
1380 if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1381 else tsz = keysz(0, ge->e->ops->c->tagsz);
1382 } else {
1383 if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1384 VALERR("tag length doesn't match precommitted value");
1385 if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1386 }
1387 csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1388 tag = bytestring_pywrap(0, tsz);
1389 err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1390 BIN_PTR(tag), tsz);
1391 assert(!err); (void)err;
1392 buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1393 end:
1394 xfree(c);
1395 return (rc);
1396 }
1397
1398 static const PyMethodDef gaeadenc_pymethods[] = {
1399 #define METHNAME(name) gaeemeth_##name
1400 NAMETH(aad, "ENC.aad() -> AAD")
1401 KWMETH(reinit, "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1402 METH (encrypt, "ENC.encrypt(MSG) -> CT")
1403 KWMETH(done, "ENC.done([tsz], [aad]) -> CT, TAG")
1404 #undef METHNAME
1405 { 0 }
1406 };
1407
1408 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1409 size_t hsz, size_t csz, size_t tsz)
1410 {
1411 gaeaddec_pyobj *gd;
1412 assert(cobj); Py_INCREF(cobj);
1413 gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1414 gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1415 gd->aad = 0; gd->clen = 0;
1416 return ((PyObject *)gd);
1417 }
1418
1419 static void gaeaddec_pydealloc(PyObject *me)
1420 {
1421 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1422
1423 gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1424 Py_DECREF(Py_TYPE(me)); FREEOBJ(me);
1425 }
1426
1427 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1428 {
1429 if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1430 else RETURN_NONE;
1431 }
1432
1433 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1434 {
1435 if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1436 else RETURN_NONE;
1437 }
1438
1439 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1440 {
1441 if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1442 else RETURN_NONE;
1443 }
1444
1445 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1446 { return getulong(GAEADDEC_CLEN(me)); }
1447
1448 static const PyGetSetDef gaeaddec_pygetset[] = {
1449 #define GETSETNAME(op, name) gaed##op##_##name
1450 GET (hsz, "DEC.hsz -> precommitted header length or `None'")
1451 GET (csz, "DEC.csz -> precommitted ciphertext length or `None'")
1452 GET (tsz, "DEC.tsz -> precommitted tag length or `None'")
1453 GET (clen, "DEC.clen -> ciphertext length so far")
1454 #undef GETSETNAME
1455 { 0 }
1456 };
1457
1458 static PyObject *gaedmeth_aad(PyObject *me)
1459 {
1460 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1461
1462 if (!(gd->f&AEADF_AADNDEP))
1463 return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(Py_TYPE(gd))->aad,
1464 GAEAD_AAD(gd->d), 0, 0));
1465 else {
1466 if (!gd->aad)
1467 gd->aad = (gaeadaad_pyobj *)
1468 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(Py_TYPE(gd))->aad,
1469 GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1470 gd->hsz);
1471 Py_INCREF(gd->aad);
1472 return ((PyObject *)gd->aad);
1473 }
1474 }
1475
1476 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1477 {
1478 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1479 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1480 struct bin n;
1481 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1482 size_t hsz = 0, csz = 0, tsz = 0;
1483 unsigned f;
1484
1485 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|OOO:enc", KWLIST,
1486 convbin, &n, &hszobj, &cszobj, &tszobj))
1487 goto end;
1488 if (check_aead_encdec(gd->d->ops->c, &f, n.sz,
1489 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1490 goto end;
1491 if (GAEAD_REINIT(gd->d, n.p, n.sz, hsz, csz, tsz))
1492 VALERR("bad aead parameter combination");
1493 gaea_sever(&gd->aad);
1494 gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1495 end:
1496 return (0);
1497 }
1498
1499 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1500 {
1501 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1502 struct bin c;
1503 char *m = 0; size_t msz; buf b;
1504 int err;
1505 PyObject *rc = 0;
1506
1507 if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
1508 if (gd->f&AEADF_AADFIRST) {
1509 if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1510 VALERR("header doesn't match precommitted length");
1511 gaea_invalidate(gd->aad);
1512 }
1513 if ((gd->f&AEADF_PCMSZ) && c.sz > gd->csz - gd->clen)
1514 VALERR("too large for precommitted message length");
1515 msz = c.sz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1516 err = GAEAD_DECRYPT(gd->d, c.p, c.sz, &b); assert(!err); (void)err;
1517 buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += c.sz;
1518 end:
1519 xfree(m);
1520 return (rc);
1521 }
1522
1523 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1524 {
1525 static const char *const kwlist[] = { "tag", "aad", 0 };
1526 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1527 PyObject *aad = Py_None;
1528 struct bin t;
1529 char *m = 0; size_t msz; buf b;
1530 int err;
1531 PyObject *rc = 0;
1532
1533 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:done", KWLIST,
1534 convbin, &t, &aad))
1535 goto end;
1536 if (aad != Py_None &&
1537 !PyObject_TypeCheck(aad,
1538 (PyTypeObject *)GCAEADENC_KEY(Py_TYPE(me))->aad))
1539 TYERR("wanted aad");
1540 if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1541 VALERR("mismatched aad");
1542 if ((gd->f&AEADF_PCHSZ) &&
1543 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1544 VALERR("header doesn't match precommitted length");
1545 if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1546 VALERR("message doesn't match precommitted length");
1547 if ((gd->f&AEADF_PCTSZ) && t.sz != gd->tsz)
1548 VALERR("tag length doesn't match precommitted value");
1549 if (keysz(t.sz, gd->d->ops->c->tagsz) != t.sz) VALERR("bad tag length");
1550 msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1551 err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad),
1552 &b, t.p, t.sz);
1553 assert(err >= 0);
1554 if (!err) VALERR("decryption failed");
1555 buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1556 end:
1557 xfree(m);
1558 return (rc);
1559 }
1560
1561 static const PyMethodDef gaeaddec_pymethods[] = {
1562 #define METHNAME(name) gaedmeth_##name
1563 NAMETH(aad, "DEC.aad() -> AAD")
1564 KWMETH(reinit, "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1565 METH (decrypt, "DEC.decrypt(CT) -> MSG")
1566 KWMETH(done, "DEC.done(TAG, [aad]) -> MSG | None")
1567 #undef METHNAME
1568 { 0 }
1569 };
1570
1571 static const PyTypeObject gcaead_pytype_skel = {
1572 PyVarObject_HEAD_INIT(0, 0) /* Header */
1573 "GCAEAD", /* @tp_name@ */
1574 sizeof(gcaead_pyobj), /* @tp_basicsize@ */
1575 0, /* @tp_itemsize@ */
1576
1577 0, /* @tp_dealloc@ */
1578 0, /* @tp_print@ */
1579 0, /* @tp_getattr@ */
1580 0, /* @tp_setattr@ */
1581 0, /* @tp_compare@ */
1582 0, /* @tp_repr@ */
1583 0, /* @tp_as_number@ */
1584 0, /* @tp_as_sequence@ */
1585 0, /* @tp_as_mapping@ */
1586 0, /* @tp_hash@ */
1587 0, /* @tp_call@ */
1588 0, /* @tp_str@ */
1589 0, /* @tp_getattro@ */
1590 0, /* @tp_setattro@ */
1591 0, /* @tp_as_buffer@ */
1592 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1593 Py_TPFLAGS_BASETYPE,
1594
1595 /* @tp_doc@ */
1596 "Authenticated encryption (key) metaclass.",
1597
1598 0, /* @tp_traverse@ */
1599 0, /* @tp_clear@ */
1600 0, /* @tp_richcompare@ */
1601 0, /* @tp_weaklistoffset@ */
1602 0, /* @tp_iter@ */
1603 0, /* @tp_iternext@ */
1604 0, /* @tp_methods@ */
1605 0, /* @tp_members@ */
1606 PYGETSET(gcaead), /* @tp_getset@ */
1607 0, /* @tp_base@ */
1608 0, /* @tp_dict@ */
1609 0, /* @tp_descr_get@ */
1610 0, /* @tp_descr_set@ */
1611 0, /* @tp_dictoffset@ */
1612 0, /* @tp_init@ */
1613 PyType_GenericAlloc, /* @tp_alloc@ */
1614 abstract_pynew, /* @tp_new@ */
1615 0, /* @tp_free@ */
1616 0 /* @tp_is_gc@ */
1617 };
1618
1619 static const PyTypeObject gaeadkey_pytype_skel = {
1620 PyVarObject_HEAD_INIT(0, 0) /* Header */
1621 "GAEKey", /* @tp_name@ */
1622 sizeof(gaeadkey_pyobj), /* @tp_basicsize@ */
1623 0, /* @tp_itemsize@ */
1624
1625 gaeadkey_pydealloc, /* @tp_dealloc@ */
1626 0, /* @tp_print@ */
1627 0, /* @tp_getattr@ */
1628 0, /* @tp_setattr@ */
1629 0, /* @tp_compare@ */
1630 0, /* @tp_repr@ */
1631 0, /* @tp_as_number@ */
1632 0, /* @tp_as_sequence@ */
1633 0, /* @tp_as_mapping@ */
1634 0, /* @tp_hash@ */
1635 0, /* @tp_call@ */
1636 0, /* @tp_str@ */
1637 0, /* @tp_getattro@ */
1638 0, /* @tp_setattro@ */
1639 0, /* @tp_as_buffer@ */
1640 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1641 Py_TPFLAGS_BASETYPE,
1642
1643 /* @tp_doc@ */
1644 "Authenticated encryption key.",
1645
1646 0, /* @tp_traverse@ */
1647 0, /* @tp_clear@ */
1648 0, /* @tp_richcompare@ */
1649 0, /* @tp_weaklistoffset@ */
1650 0, /* @tp_iter@ */
1651 0, /* @tp_iternext@ */
1652 PYMETHODS(gaeadkey), /* @tp_methods@ */
1653 0, /* @tp_members@ */
1654 0, /* @tp_getset@ */
1655 0, /* @tp_base@ */
1656 0, /* @tp_dict@ */
1657 0, /* @tp_descr_get@ */
1658 0, /* @tp_descr_set@ */
1659 0, /* @tp_dictoffset@ */
1660 0, /* @tp_init@ */
1661 PyType_GenericAlloc, /* @tp_alloc@ */
1662 abstract_pynew, /* @tp_new@ */
1663 0, /* @tp_free@ */
1664 0 /* @tp_is_gc@ */
1665 };
1666
1667 static const PyTypeObject gcaeadaad_pytype_skel = {
1668 PyVarObject_HEAD_INIT(0, 0) /* Header */
1669 "GAEAADClass", /* @tp_name@ */
1670 sizeof(gcaeadaad_pyobj), /* @tp_basicsize@ */
1671 0, /* @tp_itemsize@ */
1672
1673 0, /* @tp_dealloc@ */
1674 0, /* @tp_print@ */
1675 0, /* @tp_getattr@ */
1676 0, /* @tp_setattr@ */
1677 0, /* @tp_compare@ */
1678 0, /* @tp_repr@ */
1679 0, /* @tp_as_number@ */
1680 0, /* @tp_as_sequence@ */
1681 0, /* @tp_as_mapping@ */
1682 0, /* @tp_hash@ */
1683 0, /* @tp_call@ */
1684 0, /* @tp_str@ */
1685 0, /* @tp_getattro@ */
1686 0, /* @tp_setattro@ */
1687 0, /* @tp_as_buffer@ */
1688 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1689 Py_TPFLAGS_BASETYPE,
1690
1691 /* @tp_doc@ */
1692 "Authenticated encryption additional-data hash metaclass.",
1693
1694 0, /* @tp_traverse@ */
1695 0, /* @tp_clear@ */
1696 0, /* @tp_richcompare@ */
1697 0, /* @tp_weaklistoffset@ */
1698 0, /* @tp_iter@ */
1699 0, /* @tp_iternext@ */
1700 0, /* @tp_methods@ */
1701 0, /* @tp_members@ */
1702 0, /* @tp_getset@ */
1703 0, /* @tp_base@ */
1704 0, /* @tp_dict@ */
1705 0, /* @tp_descr_get@ */
1706 0, /* @tp_descr_set@ */
1707 0, /* @tp_dictoffset@ */
1708 0, /* @tp_init@ */
1709 PyType_GenericAlloc, /* @tp_alloc@ */
1710 abstract_pynew, /* @tp_new@ */
1711 0, /* @tp_free@ */
1712 0 /* @tp_is_gc@ */
1713 };
1714
1715 static const PyTypeObject gaeadaad_pytype_skel = {
1716 PyVarObject_HEAD_INIT(0, 0) /* Header */
1717 "GAEAAD", /* @tp_name@ */
1718 sizeof(gaeadaad_pyobj), /* @tp_basicsize@ */
1719 0, /* @tp_itemsize@ */
1720
1721 gaeadaad_pydealloc, /* @tp_dealloc@ */
1722 0, /* @tp_print@ */
1723 0, /* @tp_getattr@ */
1724 0, /* @tp_setattr@ */
1725 0, /* @tp_compare@ */
1726 0, /* @tp_repr@ */
1727 0, /* @tp_as_number@ */
1728 0, /* @tp_as_sequence@ */
1729 0, /* @tp_as_mapping@ */
1730 0, /* @tp_hash@ */
1731 0, /* @tp_call@ */
1732 0, /* @tp_str@ */
1733 0, /* @tp_getattro@ */
1734 0, /* @tp_setattro@ */
1735 0, /* @tp_as_buffer@ */
1736 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1737 Py_TPFLAGS_BASETYPE,
1738
1739 /* @tp_doc@ */
1740 "Authenticated encryption AAD hash.",
1741
1742 0, /* @tp_traverse@ */
1743 0, /* @tp_clear@ */
1744 0, /* @tp_richcompare@ */
1745 0, /* @tp_weaklistoffset@ */
1746 0, /* @tp_iter@ */
1747 0, /* @tp_iternext@ */
1748 PYMETHODS(gaeadaad), /* @tp_methods@ */
1749 0, /* @tp_members@ */
1750 PYGETSET(gaeadaad), /* @tp_getset@ */
1751 0, /* @tp_base@ */
1752 0, /* @tp_dict@ */
1753 0, /* @tp_descr_get@ */
1754 0, /* @tp_descr_set@ */
1755 0, /* @tp_dictoffset@ */
1756 0, /* @tp_init@ */
1757 PyType_GenericAlloc, /* @tp_alloc@ */
1758 abstract_pynew, /* @tp_new@ */
1759 0, /* @tp_free@ */
1760 0 /* @tp_is_gc@ */
1761 };
1762
1763 static const PyTypeObject gcaeadenc_pytype_skel = {
1764 PyVarObject_HEAD_INIT(0, 0) /* Header */
1765 "GAEEncClass", /* @tp_name@ */
1766 sizeof(gcaeadenc_pyobj), /* @tp_basicsize@ */
1767 0, /* @tp_itemsize@ */
1768
1769 0, /* @tp_dealloc@ */
1770 0, /* @tp_print@ */
1771 0, /* @tp_getattr@ */
1772 0, /* @tp_setattr@ */
1773 0, /* @tp_compare@ */
1774 0, /* @tp_repr@ */
1775 0, /* @tp_as_number@ */
1776 0, /* @tp_as_sequence@ */
1777 0, /* @tp_as_mapping@ */
1778 0, /* @tp_hash@ */
1779 0, /* @tp_call@ */
1780 0, /* @tp_str@ */
1781 0, /* @tp_getattro@ */
1782 0, /* @tp_setattro@ */
1783 0, /* @tp_as_buffer@ */
1784 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1785 Py_TPFLAGS_BASETYPE,
1786
1787 /* @tp_doc@ */
1788 "Authenticated encryption operation metaclass.",
1789
1790 0, /* @tp_traverse@ */
1791 0, /* @tp_clear@ */
1792 0, /* @tp_richcompare@ */
1793 0, /* @tp_weaklistoffset@ */
1794 0, /* @tp_iter@ */
1795 0, /* @tp_iternext@ */
1796 0, /* @tp_methods@ */
1797 0, /* @tp_members@ */
1798 0, /* @tp_getset@ */
1799 0, /* @tp_base@ */
1800 0, /* @tp_dict@ */
1801 0, /* @tp_descr_get@ */
1802 0, /* @tp_descr_set@ */
1803 0, /* @tp_dictoffset@ */
1804 0, /* @tp_init@ */
1805 PyType_GenericAlloc, /* @tp_alloc@ */
1806 abstract_pynew, /* @tp_new@ */
1807 0, /* @tp_free@ */
1808 0 /* @tp_is_gc@ */
1809 };
1810
1811 static const PyTypeObject gaeadenc_pytype_skel = {
1812 PyVarObject_HEAD_INIT(0, 0) /* Header */
1813 "GAEEnc", /* @tp_name@ */
1814 sizeof(gaeadenc_pyobj), /* @tp_basicsize@ */
1815 0, /* @tp_itemsize@ */
1816
1817 gaeadenc_pydealloc, /* @tp_dealloc@ */
1818 0, /* @tp_print@ */
1819 0, /* @tp_getattr@ */
1820 0, /* @tp_setattr@ */
1821 0, /* @tp_compare@ */
1822 0, /* @tp_repr@ */
1823 0, /* @tp_as_number@ */
1824 0, /* @tp_as_sequence@ */
1825 0, /* @tp_as_mapping@ */
1826 0, /* @tp_hash@ */
1827 0, /* @tp_call@ */
1828 0, /* @tp_str@ */
1829 0, /* @tp_getattro@ */
1830 0, /* @tp_setattro@ */
1831 0, /* @tp_as_buffer@ */
1832 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1833 Py_TPFLAGS_BASETYPE,
1834
1835 /* @tp_doc@ */
1836 "Authenticated encryption operation.",
1837
1838 0, /* @tp_traverse@ */
1839 0, /* @tp_clear@ */
1840 0, /* @tp_richcompare@ */
1841 0, /* @tp_weaklistoffset@ */
1842 0, /* @tp_iter@ */
1843 0, /* @tp_iternext@ */
1844 PYMETHODS(gaeadenc), /* @tp_methods@ */
1845 0, /* @tp_members@ */
1846 PYGETSET(gaeadenc), /* @tp_getset@ */
1847 0, /* @tp_base@ */
1848 0, /* @tp_dict@ */
1849 0, /* @tp_descr_get@ */
1850 0, /* @tp_descr_set@ */
1851 0, /* @tp_dictoffset@ */
1852 0, /* @tp_init@ */
1853 PyType_GenericAlloc, /* @tp_alloc@ */
1854 abstract_pynew, /* @tp_new@ */
1855 0, /* @tp_free@ */
1856 0 /* @tp_is_gc@ */
1857 };
1858
1859 static const PyTypeObject gcaeaddec_pytype_skel = {
1860 PyVarObject_HEAD_INIT(0, 0) /* Header */
1861 "GAEDecClass", /* @tp_name@ */
1862 sizeof(gcaeaddec_pyobj), /* @tp_basicsize@ */
1863 0, /* @tp_itemsize@ */
1864
1865 0, /* @tp_dealloc@ */
1866 0, /* @tp_print@ */
1867 0, /* @tp_getattr@ */
1868 0, /* @tp_setattr@ */
1869 0, /* @tp_compare@ */
1870 0, /* @tp_repr@ */
1871 0, /* @tp_as_number@ */
1872 0, /* @tp_as_sequence@ */
1873 0, /* @tp_as_mapping@ */
1874 0, /* @tp_hash@ */
1875 0, /* @tp_call@ */
1876 0, /* @tp_str@ */
1877 0, /* @tp_getattro@ */
1878 0, /* @tp_setattro@ */
1879 0, /* @tp_as_buffer@ */
1880 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1881 Py_TPFLAGS_BASETYPE,
1882
1883 /* @tp_doc@ */
1884 "Authenticated decryption operation metaclass.",
1885
1886 0, /* @tp_traverse@ */
1887 0, /* @tp_clear@ */
1888 0, /* @tp_richcompare@ */
1889 0, /* @tp_weaklistoffset@ */
1890 0, /* @tp_iter@ */
1891 0, /* @tp_iternext@ */
1892 0, /* @tp_methods@ */
1893 0, /* @tp_members@ */
1894 0, /* @tp_getset@ */
1895 0, /* @tp_base@ */
1896 0, /* @tp_dict@ */
1897 0, /* @tp_descr_get@ */
1898 0, /* @tp_descr_set@ */
1899 0, /* @tp_dictoffset@ */
1900 0, /* @tp_init@ */
1901 PyType_GenericAlloc, /* @tp_alloc@ */
1902 abstract_pynew, /* @tp_new@ */
1903 0, /* @tp_free@ */
1904 0 /* @tp_is_gc@ */
1905 };
1906
1907 static const PyTypeObject gaeaddec_pytype_skel = {
1908 PyVarObject_HEAD_INIT(0, 0) /* Header */
1909 "GAEDec", /* @tp_name@ */
1910 sizeof(gaeaddec_pyobj), /* @tp_basicsize@ */
1911 0, /* @tp_itemsize@ */
1912
1913 gaeaddec_pydealloc, /* @tp_dealloc@ */
1914 0, /* @tp_print@ */
1915 0, /* @tp_getattr@ */
1916 0, /* @tp_setattr@ */
1917 0, /* @tp_compare@ */
1918 0, /* @tp_repr@ */
1919 0, /* @tp_as_number@ */
1920 0, /* @tp_as_sequence@ */
1921 0, /* @tp_as_mapping@ */
1922 0, /* @tp_hash@ */
1923 0, /* @tp_call@ */
1924 0, /* @tp_str@ */
1925 0, /* @tp_getattro@ */
1926 0, /* @tp_setattro@ */
1927 0, /* @tp_as_buffer@ */
1928 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1929 Py_TPFLAGS_BASETYPE,
1930
1931 /* @tp_doc@ */
1932 "Authenticated decryption operation.",
1933
1934 0, /* @tp_traverse@ */
1935 0, /* @tp_clear@ */
1936 0, /* @tp_richcompare@ */
1937 0, /* @tp_weaklistoffset@ */
1938 0, /* @tp_iter@ */
1939 0, /* @tp_iternext@ */
1940 PYMETHODS(gaeaddec), /* @tp_methods@ */
1941 0, /* @tp_members@ */
1942 PYGETSET(gaeaddec), /* @tp_getset@ */
1943 0, /* @tp_base@ */
1944 0, /* @tp_dict@ */
1945 0, /* @tp_descr_get@ */
1946 0, /* @tp_descr_set@ */
1947 0, /* @tp_dictoffset@ */
1948 0, /* @tp_init@ */
1949 PyType_GenericAlloc, /* @tp_alloc@ */
1950 abstract_pynew, /* @tp_new@ */
1951 0, /* @tp_free@ */
1952 0 /* @tp_is_gc@ */
1953 };
1954
1955 /*----- Hash functions ----------------------------------------------------*/
1956
1957 PyTypeObject *gchash_pytype;
1958 static PyTypeObject *ghash_pytype;
1959 PyObject *sha_pyobj, *has160_pyobj;
1960
1961 typedef struct ghash_pyobj {
1962 PyObject_HEAD
1963 ghash *h;
1964 } ghash_pyobj;
1965
1966 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1967 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1968
1969 CONVFUNC(gchash, gchash *, GCHASH_CH)
1970 CONVFUNC(ghash, ghash *, GHASH_H)
1971
1972 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1973 {
1974 static const char *const kwlist[] = { 0 };
1975 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1976 goto end;
1977 return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1978 end:
1979 return (0);
1980 }
1981
1982 static PyObject *gchash_pywrap(gchash *ch)
1983 {
1984 gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1985 g->ch = ch;
1986 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1987 g->ty.ht_type.tp_base = ghash_pytype;
1988 Py_INCREF(ghash_pytype);
1989 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1990 Py_TPFLAGS_BASETYPE |
1991 Py_TPFLAGS_HEAPTYPE);
1992 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1993 g->ty.ht_type.tp_free = 0;
1994 g->ty.ht_type.tp_new = ghash_pynew;
1995 typeready(&g->ty.ht_type);
1996 return ((PyObject *)g);
1997 }
1998
1999 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
2000 {
2001 ghash_pyobj *g;
2002 if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
2003 else Py_INCREF(cobj);
2004 g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
2005 g->h = h;
2006 return ((PyObject *)g);
2007 }
2008
2009 static void ghash_pydealloc(PyObject *me)
2010 {
2011 GH_DESTROY(GHASH_H(me));
2012 Py_DECREF(Py_TYPE(me));
2013 FREEOBJ(me);
2014 }
2015
2016 static PyObject *gchget_name(PyObject *me, void *hunoz)
2017 { return (TEXT_FROMSTR(GCHASH_CH(me)->name)); }
2018
2019 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
2020 { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2021
2022 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2023 { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2024
2025 static PyObject *ghmeth_copy(PyObject *me)
2026 { return (ghash_pywrap((PyObject *)Py_TYPE(me), GH_COPY(GHASH_H(me)))); }
2027
2028 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2029 {
2030 struct bin m;
2031 if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2032 GH_HASH(GHASH_H(me), m.p, m.sz);
2033 RETURN_ME;
2034 }
2035
2036 #define GHMETH_HASHU_(n, W, w) \
2037 static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg) \
2038 { \
2039 uint##n x; \
2040 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2041 GH_HASHU##W(GHASH_H(me), x); \
2042 RETURN_ME; \
2043 }
2044 DOUINTCONV(GHMETH_HASHU_)
2045
2046 #define GHMETH_HASHBUF_(n, W, w) \
2047 static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg) \
2048 { \
2049 struct bin in; \
2050 if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2051 if (in.sz > MASK##n) TYERR("string too long"); \
2052 GH_HASHBUF##W(GHASH_H(me), in.p, in.sz); \
2053 RETURN_ME; \
2054 end: \
2055 return (0); \
2056 }
2057 DOUINTCONV(GHMETH_HASHBUF_)
2058
2059 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2060 {
2061 char *p;
2062 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2063 GH_HASHSTRZ(GHASH_H(me), p);
2064 RETURN_ME;
2065 }
2066
2067 static PyObject *ghmeth_done(PyObject *me)
2068 {
2069 ghash *g;
2070 PyObject *rc;
2071 g = GH_COPY(GHASH_H(me));
2072 rc = bytestring_pywrap(0, g->ops->c->hashsz);
2073 GH_DONE(g, BIN_PTR(rc));
2074 GH_DESTROY(g);
2075 return (rc);
2076 }
2077
2078 static const PyGetSetDef gchash_pygetset[] = {
2079 #define GETSETNAME(op, name) gch##op##_##name
2080 GET (bufsz, "CH.bufsz -> hash buffer size, or zero")
2081 GET (hashsz, "CH.hashsz -> hash output size")
2082 GET (name, "CH.name -> name of this kind of hash")
2083 #undef GETSETNAME
2084 { 0 }
2085 };
2086
2087 static const PyMethodDef ghash_pymethods[] = {
2088 #define METHNAME(name) ghmeth_##name
2089 NAMETH(copy, "H.copy() -> HH")
2090 METH (hash, "H.hash(M)")
2091 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2092 DOUINTCONV(METHU_)
2093 #undef METHU_
2094 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2095 DOUINTCONV(METHBUF_)
2096 #undef METHBUF_
2097 METH (hashstrz, "H.hashstrz(STRING)")
2098 NAMETH(done, "H.done() -> HASH")
2099 #undef METHNAME
2100 { 0 }
2101 };
2102
2103 static const PyTypeObject gchash_pytype_skel = {
2104 PyVarObject_HEAD_INIT(0, 0) /* Header */
2105 "GCHash", /* @tp_name@ */
2106 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2107 0, /* @tp_itemsize@ */
2108
2109 0, /* @tp_dealloc@ */
2110 0, /* @tp_print@ */
2111 0, /* @tp_getattr@ */
2112 0, /* @tp_setattr@ */
2113 0, /* @tp_compare@ */
2114 0, /* @tp_repr@ */
2115 0, /* @tp_as_number@ */
2116 0, /* @tp_as_sequence@ */
2117 0, /* @tp_as_mapping@ */
2118 0, /* @tp_hash@ */
2119 0, /* @tp_call@ */
2120 0, /* @tp_str@ */
2121 0, /* @tp_getattro@ */
2122 0, /* @tp_setattro@ */
2123 0, /* @tp_as_buffer@ */
2124 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2125 Py_TPFLAGS_BASETYPE,
2126
2127 /* @tp_doc@ */
2128 "Hash function metaclass.",
2129
2130 0, /* @tp_traverse@ */
2131 0, /* @tp_clear@ */
2132 0, /* @tp_richcompare@ */
2133 0, /* @tp_weaklistoffset@ */
2134 0, /* @tp_iter@ */
2135 0, /* @tp_iternext@ */
2136 0, /* @tp_methods@ */
2137 0, /* @tp_members@ */
2138 PYGETSET(gchash), /* @tp_getset@ */
2139 0, /* @tp_base@ */
2140 0, /* @tp_dict@ */
2141 0, /* @tp_descr_get@ */
2142 0, /* @tp_descr_set@ */
2143 0, /* @tp_dictoffset@ */
2144 0, /* @tp_init@ */
2145 PyType_GenericAlloc, /* @tp_alloc@ */
2146 abstract_pynew, /* @tp_new@ */
2147 0, /* @tp_free@ */
2148 0 /* @tp_is_gc@ */
2149 };
2150
2151 static const PyTypeObject ghash_pytype_skel = {
2152 PyVarObject_HEAD_INIT(0, 0) /* Header */
2153 "GHash", /* @tp_name@ */
2154 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2155 0, /* @tp_itemsize@ */
2156
2157 ghash_pydealloc, /* @tp_dealloc@ */
2158 0, /* @tp_print@ */
2159 0, /* @tp_getattr@ */
2160 0, /* @tp_setattr@ */
2161 0, /* @tp_compare@ */
2162 0, /* @tp_repr@ */
2163 0, /* @tp_as_number@ */
2164 0, /* @tp_as_sequence@ */
2165 0, /* @tp_as_mapping@ */
2166 0, /* @tp_hash@ */
2167 0, /* @tp_call@ */
2168 0, /* @tp_str@ */
2169 0, /* @tp_getattro@ */
2170 0, /* @tp_setattro@ */
2171 0, /* @tp_as_buffer@ */
2172 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2173 Py_TPFLAGS_BASETYPE,
2174
2175 /* @tp_doc@ */
2176 "Hash function, abstract base class.",
2177
2178 0, /* @tp_traverse@ */
2179 0, /* @tp_clear@ */
2180 0, /* @tp_richcompare@ */
2181 0, /* @tp_weaklistoffset@ */
2182 0, /* @tp_iter@ */
2183 0, /* @tp_iternext@ */
2184 PYMETHODS(ghash), /* @tp_methods@ */
2185 0, /* @tp_members@ */
2186 0, /* @tp_getset@ */
2187 0, /* @tp_base@ */
2188 0, /* @tp_dict@ */
2189 0, /* @tp_descr_get@ */
2190 0, /* @tp_descr_set@ */
2191 0, /* @tp_dictoffset@ */
2192 0, /* @tp_init@ */
2193 PyType_GenericAlloc, /* @tp_alloc@ */
2194 abstract_pynew, /* @tp_new@ */
2195 0, /* @tp_free@ */
2196 0 /* @tp_is_gc@ */
2197 };
2198
2199 /*----- Message authentication --------------------------------------------*/
2200
2201 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2202
2203 typedef struct gcmac_pyobj {
2204 PyHeapTypeObject ty;
2205 gcmac *cm;
2206 } gcmac_pyobj;
2207
2208 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2209 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2210 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2211 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2212 static PyObject *gmac_pywrap(PyObject *, gmac *);
2213
2214 typedef struct gmac_pyobj {
2215 PyHeapTypeObject ty;
2216 gmac *m;
2217 } gmac_pyobj;
2218
2219 extern PyTypeObject *gmac_pytype;
2220 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2221 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2222 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2223 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2224 extern int convgmac(PyObject *, void *);
2225
2226 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2227 {
2228 static const char *const kwlist[] = { "k", 0 };
2229 struct bin k;
2230
2231 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2232 goto end;
2233 if (keysz(k.sz, GCMAC_CM(ty)->keysz) != k.sz) VALERR("bad key length");
2234 return (gmac_pywrap((PyObject *)ty,
2235 GM_KEY(GCMAC_CM(ty), k.p, k.sz)));
2236 end:
2237 return (0);
2238 }
2239
2240 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2241 {
2242 static const char *const kwlist[] = { 0 };
2243 ghash_pyobj *g;
2244
2245 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2246 g = PyObject_NEW(ghash_pyobj, ty);
2247 g->h = GM_INIT(GMAC_M(ty));
2248 Py_INCREF(ty);
2249 return ((PyObject *)g);
2250 }
2251
2252 static PyObject *gcmac_pywrap(gcmac *cm)
2253 {
2254 gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2255 g->cm = cm;
2256 g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2257 g->ty.ht_type.tp_base = gmac_pytype;
2258 Py_INCREF(gmac_pytype);
2259 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2260 Py_TPFLAGS_BASETYPE |
2261 Py_TPFLAGS_HEAPTYPE);
2262 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2263 g->ty.ht_type.tp_free = 0;
2264 g->ty.ht_type.tp_new = gmac_pynew;
2265 typeready(&g->ty.ht_type);
2266 return ((PyObject *)g);
2267 }
2268
2269 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2270 {
2271 gmac_pyobj *g;
2272 if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2273 else Py_INCREF(cobj);
2274 g = newtype((PyTypeObject *)cobj, 0, 0);
2275 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2276 g->ty.ht_name = TEXT_FORMAT("%s(keyed)", m->ops->c->name);
2277 g->ty.ht_type.tp_name = TEXT_PTR(g->ty.ht_name);
2278 g->ty.ht_type.tp_base = gmhash_pytype;
2279 Py_INCREF(gmac_pytype);
2280 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2281 Py_TPFLAGS_BASETYPE |
2282 Py_TPFLAGS_HEAPTYPE);
2283 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2284 g->ty.ht_type.tp_free = 0;
2285 g->ty.ht_type.tp_new = gmhash_pynew;
2286 typeready(&g->ty.ht_type);
2287 g->m = m;
2288 return ((PyObject *)g);
2289 }
2290
2291 static void gmac_pydealloc(PyObject *me)
2292 {
2293 GM_DESTROY(GMAC_M(me));
2294 Py_DECREF(Py_TYPE(me));
2295 PyType_Type.tp_dealloc(me);
2296 }
2297
2298 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2299 { return (TEXT_FROMSTR(GCMAC_CM(me)->name)); }
2300
2301 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2302 { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2303
2304 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2305 { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2306
2307 static const PyGetSetDef gcmac_pygetset[] = {
2308 #define GETSETNAME(op, name) gcm##op##_##name
2309 GET (keysz, "CM.keysz -> acceptable key sizes")
2310 GET (tagsz, "CM.tagsz -> MAC output size")
2311 GET (name, "CM.name -> name of this kind of MAC")
2312 #undef GETSETNAME
2313 { 0 }
2314 };
2315
2316 static const PyTypeObject gcmac_pytype_skel = {
2317 PyVarObject_HEAD_INIT(0, 0) /* Header */
2318 "GCMAC", /* @tp_name@ */
2319 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2320 0, /* @tp_itemsize@ */
2321
2322 0, /* @tp_dealloc@ */
2323 0, /* @tp_print@ */
2324 0, /* @tp_getattr@ */
2325 0, /* @tp_setattr@ */
2326 0, /* @tp_compare@ */
2327 0, /* @tp_repr@ */
2328 0, /* @tp_as_number@ */
2329 0, /* @tp_as_sequence@ */
2330 0, /* @tp_as_mapping@ */
2331 0, /* @tp_hash@ */
2332 0, /* @tp_call@ */
2333 0, /* @tp_str@ */
2334 0, /* @tp_getattro@ */
2335 0, /* @tp_setattro@ */
2336 0, /* @tp_as_buffer@ */
2337 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2338 Py_TPFLAGS_BASETYPE,
2339
2340 /* @tp_doc@ */
2341 "Message authentication code metametaclass.",
2342
2343 0, /* @tp_traverse@ */
2344 0, /* @tp_clear@ */
2345 0, /* @tp_richcompare@ */
2346 0, /* @tp_weaklistoffset@ */
2347 0, /* @tp_iter@ */
2348 0, /* @tp_iternext@ */
2349 0, /* @tp_methods@ */
2350 0, /* @tp_members@ */
2351 PYGETSET(gcmac), /* @tp_getset@ */
2352 0, /* @tp_base@ */
2353 0, /* @tp_dict@ */
2354 0, /* @tp_descr_get@ */
2355 0, /* @tp_descr_set@ */
2356 0, /* @tp_dictoffset@ */
2357 0, /* @tp_init@ */
2358 PyType_GenericAlloc, /* @tp_alloc@ */
2359 abstract_pynew, /* @tp_new@ */
2360 0, /* @tp_free@ */
2361 0 /* @tp_is_gc@ */
2362 };
2363
2364 static const PyTypeObject gmac_pytype_skel = {
2365 PyVarObject_HEAD_INIT(0, 0) /* Header */
2366 "GMAC", /* @tp_name@ */
2367 sizeof(gmac_pyobj), /* @tp_basicsize@ */
2368 0, /* @tp_itemsize@ */
2369
2370 gmac_pydealloc, /* @tp_dealloc@ */
2371 0, /* @tp_print@ */
2372 0, /* @tp_getattr@ */
2373 0, /* @tp_setattr@ */
2374 0, /* @tp_compare@ */
2375 0, /* @tp_repr@ */
2376 0, /* @tp_as_number@ */
2377 0, /* @tp_as_sequence@ */
2378 0, /* @tp_as_mapping@ */
2379 0, /* @tp_hash@ */
2380 0, /* @tp_call@ */
2381 0, /* @tp_str@ */
2382 0, /* @tp_getattro@ */
2383 0, /* @tp_setattro@ */
2384 0, /* @tp_as_buffer@ */
2385 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2386 Py_TPFLAGS_BASETYPE,
2387
2388 /* @tp_doc@ */
2389 "Message authentication code metaclass, abstract base class.",
2390
2391 0, /* @tp_traverse@ */
2392 0, /* @tp_clear@ */
2393 0, /* @tp_richcompare@ */
2394 0, /* @tp_weaklistoffset@ */
2395 0, /* @tp_iter@ */
2396 0, /* @tp_iternext@ */
2397 0, /* @tp_methods@ */
2398 0, /* @tp_members@ */
2399 0, /* @tp_getset@ */
2400 0, /* @tp_base@ */
2401 0, /* @tp_dict@ */
2402 0, /* @tp_descr_get@ */
2403 0, /* @tp_descr_set@ */
2404 0, /* @tp_dictoffset@ */
2405 0, /* @tp_init@ */
2406 PyType_GenericAlloc, /* @tp_alloc@ */
2407 abstract_pynew, /* @tp_new@ */
2408 0, /* @tp_free@ */
2409 0 /* @tp_is_gc@ */
2410 };
2411
2412 static const PyTypeObject gmhash_pytype_skel = {
2413 PyVarObject_HEAD_INIT(0, 0) /* Header */
2414 "GMACHash", /* @tp_name@ */
2415 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2416 0, /* @tp_itemsize@ */
2417
2418 ghash_pydealloc, /* @tp_dealloc@ */
2419 0, /* @tp_print@ */
2420 0, /* @tp_getattr@ */
2421 0, /* @tp_setattr@ */
2422 0, /* @tp_compare@ */
2423 0, /* @tp_repr@ */
2424 0, /* @tp_as_number@ */
2425 0, /* @tp_as_sequence@ */
2426 0, /* @tp_as_mapping@ */
2427 0, /* @tp_hash@ */
2428 0, /* @tp_call@ */
2429 0, /* @tp_str@ */
2430 0, /* @tp_getattro@ */
2431 0, /* @tp_setattro@ */
2432 0, /* @tp_as_buffer@ */
2433 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2434 Py_TPFLAGS_BASETYPE,
2435
2436 /* @tp_doc@ */
2437 "Message authentication code, abstract base class.",
2438
2439 0, /* @tp_traverse@ */
2440 0, /* @tp_clear@ */
2441 0, /* @tp_richcompare@ */
2442 0, /* @tp_weaklistoffset@ */
2443 0, /* @tp_iter@ */
2444 0, /* @tp_iternext@ */
2445 0, /* @tp_methods@ */
2446 0, /* @tp_members@ */
2447 0, /* @tp_getset@ */
2448 0, /* @tp_base@ */
2449 0, /* @tp_dict@ */
2450 0, /* @tp_descr_get@ */
2451 0, /* @tp_descr_set@ */
2452 0, /* @tp_dictoffset@ */
2453 0, /* @tp_init@ */
2454 PyType_GenericAlloc, /* @tp_alloc@ */
2455 abstract_pynew, /* @tp_new@ */
2456 0, /* @tp_free@ */
2457 0 /* @tp_is_gc@ */
2458 };
2459
2460 /*----- Special snowflake for Poly1305 ------------------------------------*/
2461
2462 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2463
2464 typedef struct poly1305key_pyobj {
2465 PyHeapTypeObject ty;
2466 poly1305_key k;
2467 } poly1305key_pyobj;
2468
2469 typedef struct poly1305hash_pyobj {
2470 PyObject_HEAD
2471 unsigned f;
2472 #define f_mask 1u
2473 poly1305_ctx ctx;
2474 } poly1305hash_pyobj;
2475
2476 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2477 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2478 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2479
2480 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2481 PyObject *arg, PyObject *kw)
2482 {
2483 static const char *const kwlist[] = { "mask", 0 };
2484 poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2485 poly1305hash_pyobj *ph;
2486 struct bin m = { 0, 0 };
2487
2488 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST, convbin, &m))
2489 return (0);
2490 if (m.p && m.sz != POLY1305_MASKSZ) VALERR("bad mask length");
2491 ph = PyObject_NEW(poly1305hash_pyobj, ty);
2492 ph->f = 0;
2493 if (m.p) ph->f |= f_mask;
2494 poly1305_macinit(&ph->ctx, &pk->k, m.p);
2495 Py_INCREF(ty);
2496 return ((PyObject *)ph);
2497 end:
2498 return (0);
2499 }
2500
2501 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2502 PyObject *arg, PyObject *kw)
2503 {
2504 static const char *const kwlist[] = { "k", 0 };
2505 poly1305key_pyobj *pk;
2506 struct bin k;
2507
2508 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
2509 goto end;
2510 if (keysz(k.sz, poly1305_keysz) != k.sz) VALERR("bad key length");
2511
2512 pk = newtype(ty, 0, 0);
2513 pk->ty.ht_name = TEXT_FROMSTR("poly1305(keyed)");
2514 pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2515 pk->ty.ht_type.tp_name = TEXT_PTR(pk->ty.ht_name);
2516 pk->ty.ht_type.tp_base = poly1305hash_pytype;
2517 Py_INCREF(poly1305key_pytype);
2518 pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2519 Py_TPFLAGS_BASETYPE |
2520 Py_TPFLAGS_HEAPTYPE);
2521 pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2522 pk->ty.ht_type.tp_free = 0;
2523 pk->ty.ht_type.tp_new = poly1305hash_pynew;
2524 typeready(&pk->ty.ht_type);
2525
2526 poly1305_keyinit(&pk->k, k.p, k.sz);
2527 return ((PyObject *)pk);
2528
2529 end:
2530 return (0);
2531 }
2532
2533 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2534 { return (TEXT_FROMSTR("poly1305")); }
2535
2536 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2537 { return (keysz_pywrap(poly1305_keysz)); }
2538
2539 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2540 { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2541
2542 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2543 { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2544
2545 static PyObject *polymeth_copy(PyObject *me)
2546 {
2547 poly1305hash_pyobj *ph;
2548 ph = PyObject_NEW(poly1305hash_pyobj, Py_TYPE(me));
2549 poly1305_copy(&ph->ctx, P1305_CTX(me));
2550 Py_INCREF(Py_TYPE(me));
2551 return ((PyObject *)ph);
2552 }
2553
2554 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2555 {
2556 struct bin m;
2557 if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
2558 poly1305_hash(P1305_CTX(me), m.p, m.sz);
2559 RETURN_ME;
2560 }
2561
2562 #define POLYMETH_HASHU_(n, W, w) \
2563 static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg) \
2564 { \
2565 uint##n x; \
2566 octet b[SZ_##W]; \
2567 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2568 STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2569 RETURN_ME; \
2570 }
2571 DOUINTCONV(POLYMETH_HASHU_)
2572
2573 #define POLYMETH_HASHBUF_(n, W, w) \
2574 static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg) \
2575 { \
2576 struct bin in; \
2577 octet b[SZ_##W]; \
2578 if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
2579 if (in.sz > MASK##n) TYERR("string too long"); \
2580 STORE##W(b, in.sz); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2581 poly1305_hash(P1305_CTX(me), in.p, in.sz); \
2582 RETURN_ME; \
2583 end: \
2584 return (0); \
2585 }
2586 DOUINTCONV(POLYMETH_HASHBUF_)
2587
2588 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2589 {
2590 char *p;
2591 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2592 poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2593 RETURN_ME;
2594 }
2595
2596 static PyObject *polymeth_flush(PyObject *me)
2597 { poly1305_flush(P1305_CTX(me)); RETURN_ME; }
2598
2599 static PyObject *polymeth_flushzero(PyObject *me)
2600 { poly1305_flushzero(P1305_CTX(me)); RETURN_ME; }
2601
2602 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2603 {
2604 PyObject *pre, *suff;
2605 if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2606 if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2607 !PyObject_TypeCheck(suff, poly1305hash_pytype))
2608 TYERR("wanted a poly1305hash");
2609 if (Py_TYPE(me) != Py_TYPE(pre) || Py_TYPE(me) != Py_TYPE(suff))
2610 TYERR("key mismatch");
2611 if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2612 poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2613 RETURN_ME;
2614 end:
2615 return (0);
2616 }
2617
2618 static PyObject *polymeth_done(PyObject *me)
2619 {
2620 PyObject *rc;
2621 if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2622 rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2623 poly1305_done(P1305_CTX(me), BIN_PTR(rc));
2624 return (rc);
2625 end:
2626 return (0);
2627 }
2628
2629 static const PyGetSetDef poly1305cls_pygetset[] = {
2630 #define GETSETNAME(op, name) poly1305cls##op##_##name
2631 GET (keysz, "PC.keysz -> acceptable key sizes")
2632 GET (masksz, "PC.masksz -> mask size")
2633 GET (tagsz, "PC.tagsz -> MAC output size")
2634 GET (name, "PC.name -> name of this kind of MAC")
2635 #undef GETSETNAME
2636 { 0 }
2637 };
2638
2639 static const PyMethodDef poly1305hash_pymethods[] = {
2640 #define METHNAME(name) polymeth_##name
2641 NAMETH(copy, "P.copy() -> PP")
2642 METH (hash, "P.hash(M)")
2643 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2644 DOUINTCONV(METHU_)
2645 #undef METHU_
2646 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2647 DOUINTCONV(METHBUF_)
2648 #undef METHBUF_
2649 METH (hashstrz, "P.hashstrz(STRING)")
2650 NAMETH(flush, "P.flush()")
2651 NAMETH(flushzero, "P.flushzero()")
2652 METH (concat, "P.concat(PREFIX, SUFFIX)")
2653 NAMETH(done, "P.done() -> TAG")
2654 #undef METHNAME
2655 { 0 }
2656 };
2657
2658 static const PyTypeObject poly1305cls_pytype_skel = {
2659 PyVarObject_HEAD_INIT(0, 0) /* Header */
2660 "Poly1305Class", /* @tp_name@ */
2661 sizeof(PyHeapTypeObject), /* @tp_basicsize@ */
2662 0, /* @tp_itemsize@ */
2663
2664 0, /* @tp_dealloc@ */
2665 0, /* @tp_print@ */
2666 0, /* @tp_getattr@ */
2667 0, /* @tp_setattr@ */
2668 0, /* @tp_compare@ */
2669 0, /* @tp_repr@ */
2670 0, /* @tp_as_number@ */
2671 0, /* @tp_as_sequence@ */
2672 0, /* @tp_as_mapping@ */
2673 0, /* @tp_hash@ */
2674 0, /* @tp_call@ */
2675 0, /* @tp_str@ */
2676 0, /* @tp_getattro@ */
2677 0, /* @tp_setattro@ */
2678 0, /* @tp_as_buffer@ */
2679 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2680 Py_TPFLAGS_BASETYPE,
2681
2682 /* @tp_doc@ */
2683 "Poly1305 metametaclass. Best not to ask.",
2684
2685 0, /* @tp_traverse@ */
2686 0, /* @tp_clear@ */
2687 0, /* @tp_richcompare@ */
2688 0, /* @tp_weaklistoffset@ */
2689 0, /* @tp_iter@ */
2690 0, /* @tp_iternext@ */
2691 0, /* @tp_methods@ */
2692 0, /* @tp_members@ */
2693 PYGETSET(poly1305cls), /* @tp_getset@ */
2694 0, /* @tp_base@ */
2695 0, /* @tp_dict@ */
2696 0, /* @tp_descr_get@ */
2697 0, /* @tp_descr_set@ */
2698 0, /* @tp_dictoffset@ */
2699 0, /* @tp_init@ */
2700 PyType_GenericAlloc, /* @tp_alloc@ */
2701 abstract_pynew, /* @tp_new@ */
2702 0, /* @tp_free@ */
2703 0 /* @tp_is_gc@ */
2704 };
2705
2706 static const PyTypeObject poly1305key_pytype_skel = {
2707 PyVarObject_HEAD_INIT(0, 0) /* Header */
2708 "poly1305", /* @tp_name@ */
2709 sizeof(poly1305key_pyobj), /* @tp_basicsize@ */
2710 0, /* @tp_itemsize@ */
2711
2712 0, /* @tp_dealloc@ */
2713 0, /* @tp_print@ */
2714 0, /* @tp_getattr@ */
2715 0, /* @tp_setattr@ */
2716 0, /* @tp_compare@ */
2717 0, /* @tp_repr@ */
2718 0, /* @tp_as_number@ */
2719 0, /* @tp_as_sequence@ */
2720 0, /* @tp_as_mapping@ */
2721 0, /* @tp_hash@ */
2722 0, /* @tp_call@ */
2723 0, /* @tp_str@ */
2724 0, /* @tp_getattro@ */
2725 0, /* @tp_setattro@ */
2726 0, /* @tp_as_buffer@ */
2727 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2728 Py_TPFLAGS_BASETYPE,
2729
2730 /* @tp_doc@ */
2731 "poly1305(K): Poly1305 key.",
2732
2733 0, /* @tp_traverse@ */
2734 0, /* @tp_clear@ */
2735 0, /* @tp_richcompare@ */
2736 0, /* @tp_weaklistoffset@ */
2737 0, /* @tp_iter@ */
2738 0, /* @tp_iternext@ */
2739 0, /* @tp_methods@ */
2740 0, /* @tp_members@ */
2741 0, /* @tp_getset@ */
2742 0, /* @tp_base@ */
2743 0, /* @tp_dict@ */
2744 0, /* @tp_descr_get@ */
2745 0, /* @tp_descr_set@ */
2746 0, /* @tp_dictoffset@ */
2747 0, /* @tp_init@ */
2748 PyType_GenericAlloc, /* @tp_alloc@ */
2749 poly1305key_pynew, /* @tp_new@ */
2750 0, /* @tp_free@ */
2751 0 /* @tp_is_gc@ */
2752 };
2753
2754 static const PyTypeObject poly1305hash_pytype_skel = {
2755 PyVarObject_HEAD_INIT(0, 0) /* Header */
2756 "Poly1305Hash", /* @tp_name@ */
2757 sizeof(poly1305hash_pyobj), /* @tp_basicsize@ */
2758 0, /* @tp_itemsize@ */
2759
2760 0, /* @tp_dealloc@ */
2761 0, /* @tp_print@ */
2762 0, /* @tp_getattr@ */
2763 0, /* @tp_setattr@ */
2764 0, /* @tp_compare@ */
2765 0, /* @tp_repr@ */
2766 0, /* @tp_as_number@ */
2767 0, /* @tp_as_sequence@ */
2768 0, /* @tp_as_mapping@ */
2769 0, /* @tp_hash@ */
2770 0, /* @tp_call@ */
2771 0, /* @tp_str@ */
2772 0, /* @tp_getattro@ */
2773 0, /* @tp_setattro@ */
2774 0, /* @tp_as_buffer@ */
2775 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2776 Py_TPFLAGS_BASETYPE,
2777
2778 /* @tp_doc@ */
2779 "Poly1305 MAC context base class.",
2780
2781 0, /* @tp_traverse@ */
2782 0, /* @tp_clear@ */
2783 0, /* @tp_richcompare@ */
2784 0, /* @tp_weaklistoffset@ */
2785 0, /* @tp_iter@ */
2786 0, /* @tp_iternext@ */
2787 PYMETHODS(poly1305hash), /* @tp_methods@ */
2788 0, /* @tp_members@ */
2789 0, /* @tp_getset@ */
2790 0, /* @tp_base@ */
2791 0, /* @tp_dict@ */
2792 0, /* @tp_descr_get@ */
2793 0, /* @tp_descr_set@ */
2794 0, /* @tp_dictoffset@ */
2795 0, /* @tp_init@ */
2796 PyType_GenericAlloc, /* @tp_alloc@ */
2797 abstract_pynew, /* @tp_new@ */
2798 0, /* @tp_free@ */
2799 0 /* @tp_is_gc@ */
2800 };
2801
2802 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2803
2804 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance) \
2805 static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg) \
2806 { \
2807 dance##_ctx dance; \
2808 struct bin k, n; \
2809 PyObject *rc; \
2810 if (!PyArg_ParseTuple(arg, "O&O&:" #hdance "_prf", \
2811 convbin, &k, convbin, &n)) \
2812 goto end; \
2813 if (k.sz != keysz(k.sz, dance##_keysz)) VALERR("bad key length"); \
2814 if (n.sz != HDANCE##_INSZ) VALERR("bad input length"); \
2815 rc = bytestring_pywrap(0, HSALSA20_OUTSZ); \
2816 dance##_init(&dance, k.p, k.sz, 0); \
2817 hdance##_prf(&dance, n.p, BIN_PTR(rc)); \
2818 return (rc); \
2819 end: \
2820 return (0); \
2821 }
2822
2823 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2824 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2825 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2826
2827 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2828 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2829 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2830
2831 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2832
2833 static PyTypeObject *kxvik_pytype;
2834
2835 typedef struct kxvik_pyobj {
2836 PyObject_HEAD
2837 keccak1600_state s;
2838 unsigned n;
2839 } kxvik_pyobj;
2840
2841 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2842 {
2843 unsigned n = 24;
2844 kxvik_pyobj *rc = 0;
2845 static const char *const kwlist[] = { "nround", 0 };
2846 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2847 convuint, &n))
2848 goto end;
2849 rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2850 rc->n = n;
2851 keccak1600_init(&rc->s);
2852 end:
2853 return ((PyObject *)rc);
2854 }
2855
2856 static PyObject *kxvikmeth_copy(PyObject *me)
2857 {
2858 kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2859 rc = (kxvik_pyobj *)Py_TYPE(k)->tp_alloc(Py_TYPE(k), 0);
2860 rc->s = k->s; rc->n = k->n;
2861 return ((PyObject *)rc);
2862 }
2863
2864 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2865 {
2866 kxvik_pyobj *k = (kxvik_pyobj *)me;
2867 kludge64 t[25];
2868 const octet *q;
2869 octet buf[8];
2870 unsigned i;
2871 struct bin in;
2872 size_t n;
2873
2874 if (!PyArg_ParseTuple(arg, "O&:mix", convbin, &in)) goto end;
2875 if (in.sz > 200) VALERR("out of range");
2876 q = in.p; n = in.sz;
2877 i = 0;
2878 while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2879 if (n) {
2880 memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2881 LOAD64_L_(t[i], buf); i++;
2882 }
2883 keccak1600_mix(&k->s, t, i);
2884 RETURN_ME;
2885 end:
2886 return (0);
2887 }
2888
2889 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2890 {
2891 kxvik_pyobj *k = (kxvik_pyobj *)me;
2892 PyObject *rc = 0;
2893 kludge64 t[25];
2894 octet *q, buf[8];
2895 unsigned i;
2896 unsigned n;
2897
2898 if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2899 if (n > 200) VALERR("out of range");
2900 rc = bytestring_pywrap(0, n);
2901 q = (octet *)BIN_PTR(rc);
2902 keccak1600_extract(&k->s, t, (n + 7)/8);
2903 i = 0;
2904 while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2905 if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2906 end:
2907 return (rc);
2908 }
2909
2910 static PyObject *kxvikmeth_step(PyObject *me)
2911 {
2912 kxvik_pyobj *k = (kxvik_pyobj *)me;
2913 keccak1600_p(&k->s, &k->s, k->n);
2914 RETURN_ME;
2915 }
2916
2917 static const PyMemberDef kxvik_pymembers[] = {
2918 #define MEMBERSTRUCT kxvik_pyobj
2919 MEMRNM(nround, T_UINT, n, 0, "KECCAC.nround -> number of rounds")
2920 #undef MEMBERSTRUCT
2921 { 0 }
2922 };
2923
2924 static const PyMethodDef kxvik_pymethods[] = {
2925 #define METHNAME(func) kxvikmeth_##func
2926 NAMETH(copy, "KECCAK.copy() -> KECCAK'")
2927 METH (mix, "KECCAK.mix(DATA)")
2928 METH (extract, "KECCAK.extract(NOCTETS)")
2929 NAMETH(step, "KECCAK.step()")
2930 #undef METHNAME
2931 { 0 }
2932 };
2933
2934 static const PyTypeObject kxvik_pytype_skel = {
2935 PyVarObject_HEAD_INIT(0, 0) /* Header */
2936 "Keccak1600", /* @tp_name@ */
2937 sizeof(kxvik_pyobj), /* @tp_basicsize@ */
2938 0, /* @tp_itemsize@ */
2939
2940 0, /* @tp_dealloc@ */
2941 0, /* @tp_print@ */
2942 0, /* @tp_getattr@ */
2943 0, /* @tp_setattr@ */
2944 0, /* @tp_compare@ */
2945 0, /* @tp_repr@ */
2946 0, /* @tp_as_number@ */
2947 0, /* @tp_as_sequence@ */
2948 0, /* @tp_as_mapping@ */
2949 0, /* @tp_hash@ */
2950 0, /* @tp_call@ */
2951 0, /* @tp_str@ */
2952 0, /* @tp_getattro@ */
2953 0, /* @tp_setattro@ */
2954 0, /* @tp_as_buffer@ */
2955 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2956 Py_TPFLAGS_BASETYPE,
2957
2958 /* @tp_doc@ */
2959 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2960
2961 0, /* @tp_traverse@ */
2962 0, /* @tp_clear@ */
2963 0, /* @tp_richcompare@ */
2964 0, /* @tp_weaklistoffset@ */
2965 0, /* @tp_iter@ */
2966 0, /* @tp_iternext@ */
2967 PYMETHODS(kxvik), /* @tp_methods@ */
2968 PYMEMBERS(kxvik), /* @tp_members@ */
2969 0, /* @tp_getset@ */
2970 0, /* @tp_base@ */
2971 0, /* @tp_dict@ */
2972 0, /* @tp_descr_get@ */
2973 0, /* @tp_descr_set@ */
2974 0, /* @tp_dictoffset@ */
2975 0, /* @tp_init@ */
2976 PyType_GenericAlloc, /* @tp_alloc@ */
2977 kxvik_pynew, /* @tp_new@ */
2978 0, /* @tp_free@ */
2979 0 /* @tp_is_gc@ */
2980 };
2981
2982 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2983
2984 typedef struct shake_pyobj {
2985 PyObject_HEAD
2986 int st;
2987 shake_ctx h;
2988 } shake_pyobj;
2989
2990 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
2991 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
2992
2993 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
2994 const void *, size_t,
2995 const void *, size_t),
2996 PyTypeObject *ty,
2997 PyObject *arg, PyObject *kw)
2998 {
2999 shake_pyobj *rc = 0;
3000 PyObject *pobj = Py_None, *fobj = Py_None;
3001 struct bin p = { 0, 0 }, f = { 0, 0 };
3002 static const char *const kwlist[] = { "perso", "func", 0 };
3003
3004 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:new", KWLIST, &pobj, &fobj))
3005 goto end;
3006 if (pobj != Py_None && !convbin(pobj, &p)) goto end;
3007 if (fobj != Py_None && !convbin(fobj, &f)) goto end;
3008 rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3009 initfn(&rc->h, f.p, f.sz, p.p, p.sz);
3010 rc->st = 0;
3011 end:
3012 return ((PyObject *)rc);
3013 }
3014
3015 static PyObject *shake128_pynew(PyTypeObject *ty,
3016 PyObject *arg, PyObject *kw)
3017 { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
3018
3019 static PyObject *shake256_pynew(PyTypeObject *ty,
3020 PyObject *arg, PyObject *kw)
3021 { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
3022
3023 static int shake_check(PyObject *me, int st)
3024 {
3025 if (SHAKE_ST(me) != st) VALERR("wrong state");
3026 return (0);
3027 end:
3028 return (-1);
3029 }
3030
3031 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3032 {
3033 struct bin m;
3034 if (!PyArg_ParseTuple(arg, "O&:hash", convbin, &m)) return (0);
3035 if (shake_check(me, 0)) return (0);
3036 shake_hash(SHAKE_H(me), m.p, m.sz);
3037 RETURN_ME;
3038 }
3039
3040 #define SHAKEMETH_HASHU_(n, W, w) \
3041 static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg) \
3042 { \
3043 uint##n x; \
3044 octet b[SZ_##W]; \
3045 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3046 if (shake_check(me, 0)) return (0); \
3047 STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3048 RETURN_ME; \
3049 }
3050 DOUINTCONV(SHAKEMETH_HASHU_)
3051
3052 #define SHAKEMETH_HASHBUF_(n, W, w) \
3053 static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg) \
3054 { \
3055 struct bin in; \
3056 octet b[SZ_##W]; \
3057 if (!PyArg_ParseTuple(arg, "O&:hashbuf" #w, convbin, &in)) goto end; \
3058 if (in.sz > MASK##n) TYERR("string too long"); \
3059 if (shake_check(me, 0)) goto end; \
3060 STORE##W(b, in.sz); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3061 shake_hash(SHAKE_H(me), in.p, in.sz); \
3062 RETURN_ME; \
3063 end: \
3064 return (0); \
3065 }
3066 DOUINTCONV(SHAKEMETH_HASHBUF_)
3067
3068 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3069 {
3070 char *p;
3071 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3072 if (shake_check(me, 0)) return (0);
3073 shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3074 RETURN_ME;
3075 }
3076
3077 static PyObject *shakemeth_xof(PyObject *me)
3078 {
3079 if (shake_check(me, 0)) goto end;
3080 shake_xof(SHAKE_H(me));
3081 SHAKE_ST(me) = 1;
3082 RETURN_ME;
3083 end:
3084 return (0);
3085 }
3086
3087 static PyObject *shakemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
3088 {
3089 PyObject *rc = 0;
3090 size_t n = 100 - SHAKE_H(me)->h.r/2;
3091 static const char *const kwlist[] = { "hsz", 0 };
3092 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:done", KWLIST, convszt, &n))
3093 goto end;
3094 if (shake_check(me, 0)) goto end;
3095 rc = bytestring_pywrap(0, n);
3096 shake_done(SHAKE_H(me), BIN_PTR(rc), n);
3097 SHAKE_ST(me) = -1;
3098 end:
3099 return (rc);
3100 }
3101
3102 static PyObject *shakemeth_copy(PyObject *me)
3103 {
3104 shake_pyobj *rc = 0;
3105
3106 rc = PyObject_NEW(shake_pyobj, Py_TYPE(me));
3107 rc->h = *SHAKE_H(me);
3108 rc->st = SHAKE_ST(me);
3109 return ((PyObject *)rc);
3110 }
3111
3112 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3113 {
3114 PyObject *rc = 0;
3115 size_t sz;
3116
3117 if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3118 if (shake_check(me, 1)) goto end;
3119 rc = bytestring_pywrap(0, sz);
3120 shake_get(SHAKE_H(me), BIN_PTR(rc), sz);
3121 end:
3122 return (rc);
3123 }
3124
3125 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3126 {
3127 PyObject *rc = 0;
3128 struct bin in;
3129
3130 if (!PyArg_ParseTuple(arg, "O&:mask", convbin, &in)) goto end;
3131 if (shake_check(me, 1)) goto end;
3132 rc = bytestring_pywrap(0, in.sz);
3133 shake_mask(SHAKE_H(me), in.p, BIN_PTR(rc), in.sz);
3134 end:
3135 return (rc);
3136 }
3137
3138 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3139 {
3140 int st = SHAKE_ST(me);
3141 return (TEXT_FROMSTR(st == 0 ? "absorb" :
3142 st == 1 ? "squeeze" : "dead"));
3143 }
3144
3145 static const PyMemberDef shake_pymembers[] = {
3146 #define MEMBERSTRUCT shake_pyobj
3147 MEMRNM(rate, T_UINT, h.h.r, READONLY, "S.rate -> rate, in bytes")
3148 MEMRNM(buffered, T_UINT, h.h.n, READONLY,
3149 "S.buffered -> amount currently buffered")
3150 #undef MEMBERSTRUCT
3151 { 0 }
3152 };
3153
3154 static const PyGetSetDef shake_pygetset[] = {
3155 #define GETSETNAME(op, name) shake##op##_##name
3156 GET (state, "S.state -> `absorb', `squeeze', `dead'")
3157 #undef GETSETNAME
3158 { 0 }
3159 };
3160
3161 static const PyMethodDef shake_pymethods[] = {
3162 #define METHNAME(func) shakemeth_##func
3163 NAMETH(copy, "S.copy() -> SS")
3164 METH (hash, "S.hash(M)")
3165 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3166 DOUINTCONV(METHU_)
3167 #undef METHU_
3168 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3169 DOUINTCONV(METHBUF_)
3170 #undef METHBUF_
3171 METH (hashstrz, "S.hashstrz(STRING)")
3172 NAMETH(xof, "S.xof()")
3173 KWMETH(done, "S.done([hsz = CAP]) -> H")
3174 METH (get, "S.get(LEN) -> H")
3175 METH (mask, "S.mask(M) -> C")
3176 #undef METHNAME
3177 { 0 }
3178 };
3179
3180 static const PyTypeObject shake_pytype_skel = {
3181 PyVarObject_HEAD_INIT(0, 0) /* Header */
3182 "Shake", /* @tp_name@ */
3183 sizeof(shake_pyobj), /* @tp_basicsize@ */
3184 0, /* @tp_itemsize@ */
3185
3186 0, /* @tp_dealloc@ */
3187 0, /* @tp_print@ */
3188 0, /* @tp_getattr@ */
3189 0, /* @tp_setattr@ */
3190 0, /* @tp_compare@ */
3191 0, /* @tp_repr@ */
3192 0, /* @tp_as_number@ */
3193 0, /* @tp_as_sequence@ */
3194 0, /* @tp_as_mapping@ */
3195 0, /* @tp_hash@ */
3196 0, /* @tp_call@ */
3197 0, /* @tp_str@ */
3198 0, /* @tp_getattro@ */
3199 0, /* @tp_setattro@ */
3200 0, /* @tp_as_buffer@ */
3201 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3202 Py_TPFLAGS_BASETYPE,
3203
3204 /* @tp_doc@ */
3205 "SHAKE/cSHAKE/KMAC base class.",
3206
3207 0, /* @tp_traverse@ */
3208 0, /* @tp_clear@ */
3209 0, /* @tp_richcompare@ */
3210 0, /* @tp_weaklistoffset@ */
3211 0, /* @tp_iter@ */
3212 0, /* @tp_iternext@ */
3213 PYMETHODS(shake), /* @tp_methods@ */
3214 PYMEMBERS(shake), /* @tp_members@ */
3215 PYGETSET(shake), /* @tp_getset@ */
3216 0, /* @tp_base@ */
3217 0, /* @tp_dict@ */
3218 0, /* @tp_descr_get@ */
3219 0, /* @tp_descr_set@ */
3220 0, /* @tp_dictoffset@ */
3221 0, /* @tp_init@ */
3222 PyType_GenericAlloc, /* @tp_alloc@ */
3223 abstract_pynew, /* @tp_new@ */
3224 0, /* @tp_free@ */
3225 0 /* @tp_is_gc@ */
3226 };
3227
3228 static const PyTypeObject shake128_pytype_skel = {
3229 PyVarObject_HEAD_INIT(0, 0) /* Header */
3230 "Shake128", /* @tp_name@ */
3231 0, /* @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 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
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 0, /* @tp_methods@ */
3262 0, /* @tp_members@ */
3263 0, /* @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 shake128_pynew, /* @tp_new@ */
3272 0, /* @tp_free@ */
3273 0 /* @tp_is_gc@ */
3274 };
3275
3276 static const PyTypeObject shake256_pytype_skel = {
3277 PyVarObject_HEAD_INIT(0, 0) /* Header */
3278 "Shake256", /* @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 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 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 shake256_pynew, /* @tp_new@ */
3320 0, /* @tp_free@ */
3321 0 /* @tp_is_gc@ */
3322 };
3323
3324 /*----- Pseudorandom permutations -----------------------------------------*/
3325
3326 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3327
3328 typedef struct prpinfo {
3329 const char *name;
3330 const octet *keysz;
3331 size_t ctxsz;
3332 size_t blksz;
3333 void (*init)(void *, const void *, size_t);
3334 void (*eblk)(void *, const void *, void *);
3335 void (*dblk)(void *, const void *, void *);
3336 } prpinfo;
3337
3338 #define PRP_DEF(PRE, pre) \
3339 static void pre##_prpinit(void *ctx, const void *k, size_t ksz) \
3340 { pre##_init(ctx, k, ksz); } \
3341 static void pre##_prpeblk(void *ctx, const void *in, void *out) \
3342 { \
3343 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3344 pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3345 } \
3346 static void pre##_prpdblk(void *ctx, const void *in, void *out) \
3347 { \
3348 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3349 pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3350 } \
3351 static const prpinfo pre##_prpinfo = { \
3352 #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ, \
3353 pre##_prpinit, pre##_prpeblk, pre##_prpdblk \
3354 };
3355 PRPS(PRP_DEF)
3356
3357 static const struct prpinfo *const gprptab[] = {
3358 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3359 PRPS(PRP_ENTRY)
3360 0
3361 };
3362
3363 typedef struct gcprp_pyobj {
3364 PyHeapTypeObject ty;
3365 const prpinfo *prp;
3366 } gcprp_pyobj;
3367 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3368
3369 typedef struct gprp_pyobj {
3370 PyObject_HEAD
3371 const prpinfo *prp;
3372 } gprp_pyobj;
3373 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3374 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3375
3376 typedef struct prp {
3377 const prpinfo *prp;
3378 void *ctx;
3379 } prp;
3380
3381 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3382 {
3383 static const char *const kwlist[] = { "key", 0 };
3384 struct bin k;
3385 const prpinfo *prp = GCPRP_PRP(ty);
3386 PyObject *me;
3387
3388 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &k))
3389 goto end;
3390 if (keysz(k.sz, prp->keysz) != k.sz) VALERR("bad key length");
3391 me = (PyObject *)ty->tp_alloc(ty, 0);
3392 GPRP_PRP(me) = prp;
3393 prp->init(GPRP_CTX(me), k.p, k.sz);
3394 Py_INCREF(me);
3395 return (me);
3396 end:
3397 return (0);
3398 }
3399
3400 static void gprp_pydealloc(PyObject *me)
3401 { Py_DECREF(Py_TYPE(me)); FREEOBJ(me); }
3402
3403 static PyObject *gcprp_pywrap(const prpinfo *prp)
3404 {
3405 gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3406 g->prp = prp;
3407 g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3408 g->ty.ht_type.tp_base = gprp_pytype;
3409 Py_INCREF(gprp_pytype);
3410 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3411 Py_TPFLAGS_BASETYPE |
3412 Py_TPFLAGS_HEAPTYPE);
3413 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3414 g->ty.ht_type.tp_free = 0;
3415 g->ty.ht_type.tp_new = gprp_pynew;
3416 typeready(&g->ty.ht_type);
3417 return ((PyObject *)g);
3418 }
3419
3420 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3421 { return (TEXT_FROMSTR(GCPRP_PRP(me)->name)); }
3422 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3423 { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3424 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3425 { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3426
3427 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3428 {
3429 struct bin m;
3430 PyObject *rc = 0;
3431
3432 if (!PyArg_ParseTuple(arg, "O&:encrypt", convbin, &m)) goto end;
3433 if (m.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3434 rc = bytestring_pywrap(0, m.sz);
3435 GPRP_PRP(me)->eblk(GPRP_CTX(me), m.p, BIN_PTR(rc));
3436 end:
3437 return (rc);
3438 }
3439
3440 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3441 {
3442 struct bin c;
3443 PyObject *rc = 0;
3444
3445 if (!PyArg_ParseTuple(arg, "O&:decrypt", convbin, &c)) goto end;
3446 if (c.sz != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3447 rc = bytestring_pywrap(0, c.sz);
3448 GPRP_PRP(me)->dblk(GPRP_CTX(me), c.p, BIN_PTR(rc));
3449 end:
3450 return (rc);
3451 }
3452
3453 static const PyGetSetDef gcprp_pygetset[] = {
3454 #define GETSETNAME(op, name) gcp##op##_##name
3455 GET (keysz, "CP.keysz -> acceptable key sizes")
3456 GET (blksz, "CP.blksz -> block size")
3457 GET (name, "CP.name -> name of this kind of PRP")
3458 #undef GETSETNAME
3459 { 0 }
3460 };
3461
3462 static const PyMethodDef gprp_pymethods[] = {
3463 #define METHNAME(name) gpmeth_##name
3464 METH (encrypt, "P.encrypt(PT) -> CT")
3465 METH (decrypt, "P.decrypt(CT) -> PT")
3466 #undef METHNAME
3467 { 0 }
3468 };
3469
3470 static const PyTypeObject gcprp_pytype_skel = {
3471 PyVarObject_HEAD_INIT(0, 0) /* Header */
3472 "GCPRP", /* @tp_name@ */
3473 sizeof(gcprp_pyobj), /* @tp_basicsize@ */
3474 0, /* @tp_itemsize@ */
3475
3476 0, /* @tp_dealloc@ */
3477 0, /* @tp_print@ */
3478 0, /* @tp_getattr@ */
3479 0, /* @tp_setattr@ */
3480 0, /* @tp_compare@ */
3481 0, /* @tp_repr@ */
3482 0, /* @tp_as_number@ */
3483 0, /* @tp_as_sequence@ */
3484 0, /* @tp_as_mapping@ */
3485 0, /* @tp_hash@ */
3486 0, /* @tp_call@ */
3487 0, /* @tp_str@ */
3488 0, /* @tp_getattro@ */
3489 0, /* @tp_setattro@ */
3490 0, /* @tp_as_buffer@ */
3491 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3492 Py_TPFLAGS_BASETYPE,
3493
3494 /* @tp_doc@ */
3495 "Pseudorandom permutation metaclass.",
3496
3497 0, /* @tp_traverse@ */
3498 0, /* @tp_clear@ */
3499 0, /* @tp_richcompare@ */
3500 0, /* @tp_weaklistoffset@ */
3501 0, /* @tp_iter@ */
3502 0, /* @tp_iternext@ */
3503 0, /* @tp_methods@ */
3504 0, /* @tp_members@ */
3505 PYGETSET(gcprp), /* @tp_getset@ */
3506 0, /* @tp_base@ */
3507 0, /* @tp_dict@ */
3508 0, /* @tp_descr_get@ */
3509 0, /* @tp_descr_set@ */
3510 0, /* @tp_dictoffset@ */
3511 0, /* @tp_init@ */
3512 PyType_GenericAlloc, /* @tp_alloc@ */
3513 abstract_pynew, /* @tp_new@ */
3514 0, /* @tp_free@ */
3515 0 /* @tp_is_gc@ */
3516 };
3517
3518 static const PyTypeObject gprp_pytype_skel = {
3519 PyVarObject_HEAD_INIT(0, 0) /* Header */
3520 "GPRP", /* @tp_name@ */
3521 sizeof(gprp_pyobj), /* @tp_basicsize@ */
3522 0, /* @tp_itemsize@ */
3523
3524 gprp_pydealloc, /* @tp_dealloc@ */
3525 0, /* @tp_print@ */
3526 0, /* @tp_getattr@ */
3527 0, /* @tp_setattr@ */
3528 0, /* @tp_compare@ */
3529 0, /* @tp_repr@ */
3530 0, /* @tp_as_number@ */
3531 0, /* @tp_as_sequence@ */
3532 0, /* @tp_as_mapping@ */
3533 0, /* @tp_hash@ */
3534 0, /* @tp_call@ */
3535 0, /* @tp_str@ */
3536 0, /* @tp_getattro@ */
3537 0, /* @tp_setattro@ */
3538 0, /* @tp_as_buffer@ */
3539 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3540 Py_TPFLAGS_BASETYPE,
3541
3542 /* @tp_doc@ */
3543 "Pseudorandom permutation, abstract base class.",
3544
3545 0, /* @tp_traverse@ */
3546 0, /* @tp_clear@ */
3547 0, /* @tp_richcompare@ */
3548 0, /* @tp_weaklistoffset@ */
3549 0, /* @tp_iter@ */
3550 0, /* @tp_iternext@ */
3551 PYMETHODS(gprp), /* @tp_methods@ */
3552 0, /* @tp_members@ */
3553 0, /* @tp_getset@ */
3554 0, /* @tp_base@ */
3555 0, /* @tp_dict@ */
3556 0, /* @tp_descr_get@ */
3557 0, /* @tp_descr_set@ */
3558 0, /* @tp_dictoffset@ */
3559 0, /* @tp_init@ */
3560 PyType_GenericAlloc, /* @tp_alloc@ */
3561 abstract_pynew, /* @tp_new@ */
3562 0, /* @tp_free@ */
3563 0 /* @tp_is_gc@ */
3564 };
3565
3566 /*----- Main code ---------------------------------------------------------*/
3567
3568 static const struct nameval consts[] = {
3569 CONST(AEADF_PCHSZ), CONST(AEADF_PCMSZ), CONST(AEADF_PCTSZ),
3570 CONST(AEADF_AADNDEP), CONST(AEADF_AADFIRST), CONST(AEADF_NOAAD),
3571 { 0 }
3572 };
3573
3574 static const PyMethodDef methods[] = {
3575 #define METHNAME(func) meth_##func
3576 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, \
3577 "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3578 METH_HDANCE(hsalsa20, "HSalsa20")
3579 METH_HDANCE(hsalsa2012, "HSalsa20/12")
3580 METH_HDANCE(hsalsa208, "HSalsa20/8")
3581 METH_HDANCE(hchacha20, "HChaCha20")
3582 METH_HDANCE(hchacha12, "HChaCha12")
3583 METH_HDANCE(hchacha8, "HChaCha8")
3584 #undef METH_DANCE
3585 #undef METHNAME
3586 { 0 }
3587 };
3588
3589 void algorithms_pyinit(void)
3590 {
3591 INITTYPE(keysz, root);
3592 INITTYPE(keyszany, keysz);
3593 INITTYPE(keyszrange, keysz);
3594 INITTYPE(keyszset, keysz);
3595 INITTYPE(gccipher, type);
3596 INITTYPE(gcipher, root);
3597 INITTYPE(gcaead, type);
3598 INITTYPE(gaeadkey, root);
3599 INITTYPE(gcaeadaad, type);
3600 INITTYPE(gaeadaad, root);
3601 INITTYPE(gcaeadenc, type);
3602 INITTYPE(gaeadenc, root);
3603 INITTYPE(gcaeaddec, type);
3604 INITTYPE(gaeaddec, root);
3605 INITTYPE(gchash, type);
3606 INITTYPE(ghash, root);
3607 INITTYPE(gcmac, type);
3608 INITTYPE(gmac, type);
3609 INITTYPE(gmhash, ghash);
3610 INITTYPE(poly1305cls, type);
3611 INITTYPE_META(poly1305key, type, poly1305cls);
3612 INITTYPE(poly1305hash, root);
3613 INITTYPE(kxvik, root);
3614 INITTYPE(shake, root);
3615 INITTYPE(shake128, shake);
3616 INITTYPE(shake256, shake);
3617 INITTYPE(gcprp, type);
3618 INITTYPE(gprp, root);
3619 addmethods(methods);
3620 }
3621
3622 #define gcprp prpinfo
3623 #define CLASS_TABLES(_) _(cipher) _(aead) _(hash) _(mac) _(prp)
3624 #define TABLE_FNS(pre) \
3625 static const char *pre##_namefn(const void *p) \
3626 { const gc##pre *const *cls = p; return (*cls ? (*cls)->name : 0); } \
3627 static PyObject *pre##_valfn(const void *p) \
3628 { gc##pre *const*cls = p; return (gc##pre##_pywrap(*cls)); }
3629 CLASS_TABLES(TABLE_FNS)
3630
3631 void algorithms_pyinsert(PyObject *mod)
3632 {
3633 PyObject *d;
3634 INSERT("KeySZ", keysz_pytype);
3635 INSERT("KeySZAny", keyszany_pytype);
3636 INSERT("KeySZRange", keyszrange_pytype);
3637 INSERT("KeySZSet", keyszset_pytype);
3638 INSERT("GCCipher", gccipher_pytype);
3639 INSERT("GCipher", gcipher_pytype);
3640 INSERT("gcciphers", make_algtab(gciphertab, sizeof(gccipher *),
3641 cipher_namefn, cipher_valfn));
3642 INSERT("GCAEAD", gcaead_pytype);
3643 INSERT("GAEKey", gaeadkey_pytype);
3644 INSERT("GAEAADClass", gcaeadaad_pytype);
3645 INSERT("GAEAAD", gaeadaad_pytype);
3646 INSERT("GAEEncClass", gcaeadenc_pytype);
3647 INSERT("GAEEnc", gaeadenc_pytype);
3648 INSERT("GAEDecClass", gcaeaddec_pytype);
3649 INSERT("GAEDec", gaeaddec_pytype);
3650 INSERT("gcaeads", make_algtab(gaeadtab, sizeof(gcaead *),
3651 aead_namefn, aead_valfn));
3652 INSERT("GCHash", gchash_pytype);
3653 INSERT("GHash", ghash_pytype);
3654 d = make_algtab(ghashtab, sizeof(gchash *), hash_namefn, hash_valfn);
3655 INSERT("gchashes", d);
3656 sha_pyobj = PyMapping_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3657 has160_pyobj = PyMapping_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3658 INSERT("GCMAC", gcmac_pytype);
3659 INSERT("GMAC", gmac_pytype);
3660 INSERT("GMACHash", gmhash_pytype);
3661 INSERT("gcmacs", make_algtab(gmactab, sizeof(gcmac *),
3662 mac_namefn, mac_valfn));
3663 INSERT("Poly1305Class", poly1305cls_pytype);
3664 INSERT("poly1305", poly1305key_pytype);
3665 INSERT("Poly1305Hash", poly1305hash_pytype);
3666 INSERT("Keccak1600", kxvik_pytype);
3667 INSERT("Shake", shake_pytype);
3668 INSERT("Shake128", shake128_pytype);
3669 INSERT("Shake256", shake256_pytype);
3670 INSERT("GCPRP", gcprp_pytype);
3671 INSERT("GPRP", gprp_pytype);
3672 INSERT("gcprps", make_algtab(gprptab, sizeof(gcprp *),
3673 prp_namefn, prp_valfn));
3674 setconstants(mod, consts);
3675 }
3676
3677 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings