~mdw / catacomb-python / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
*.c: Use Python's facilities for defining class and static methods.
[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 = 0, mod = 1;
125 keyszrange_pyobj *o;
126
127 if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|iii:new", KWLIST,
128 &dfl, &min, &max, &mod))
129 goto end;
130 if (dfl < 0 || min < 0) VALERR("key size cannot be negative");
131 if (min > dfl || (max && dfl > max)) VALERR("bad key size bounds");
132 if (mod <= 0 || dfl%mod || min%mod || max%mod)
133 VALERR("bad key size modulus");
134 o = (keyszrange_pyobj *)ty->tp_alloc(ty, 0);
135 o->dfl = dfl;
136 o->min = min;
137 o->max = max;
138 o->mod = mod;
139 return ((PyObject *)o);
140 end:
141 return (0);
142 }
143
144 static PyObject *keyszset_pynew(PyTypeObject *ty,
145 PyObject *arg, PyObject *kw)
146 {
147 static const char *const kwlist[] = { "default", "set", 0 };
148 int dfl, i, n, xx;
149 PyObject *set = 0;
150 PyObject *x = 0, *l = 0;
151 keyszset_pyobj *o = 0;
152
153 if (!PyArg_ParseTupleAndKeywords(arg, kw, "i|O:new", KWLIST, &dfl, &set))
154 goto end;
155 if (!set) set = PyTuple_New(0);
156 else Py_INCREF(set);
157 if (!PySequence_Check(set)) TYERR("want a sequence");
158 n = PySequence_Size(set); if (n < 0) goto end;
159 l = PyList_New(0); if (!l) goto end;
160 if (dfl < 0) VALERR("key size cannot be negative");
161 x = PyInt_FromLong(dfl);
162 PyList_Append(l, x);
163 Py_DECREF(x);
164 x = 0;
165 for (i = 0; i < n; i++) {
166 if ((x = PySequence_GetItem(set, i)) == 0) goto end;
167 xx = PyInt_AsLong(x);
168 if (PyErr_Occurred()) goto end;
169 if (xx == dfl) continue;
170 if (xx < 0) VALERR("key size cannot be negative");
171 PyList_Append(l, x);
172 Py_DECREF(x);
173 x = 0;
174 }
175 Py_DECREF(set);
176 if ((set = PySequence_Tuple(l)) == 0) goto end;
177 o = (keyszset_pyobj *)ty->tp_alloc(ty, 0);
178 o->dfl = dfl;
179 o->set = set;
180 Py_INCREF(set);
181 end:
182 Py_XDECREF(set);
183 Py_XDECREF(l);
184 Py_XDECREF(x);
185 return ((PyObject *)o);
186 }
187
188 static PyObject *kaget_min(PyObject *me, void *hunoz)
189 { return (PyInt_FromLong(0)); }
190 #define kaget_max kaget_min
191
192 static PyObject *ksget_min(PyObject *me, void *hunoz)
193 {
194 PyObject *set = ((keyszset_pyobj *)me)->set;
195 int i, n, y, x = -1;
196 n = PyTuple_GET_SIZE(set);
197 for (i = 0; i < n; i++) {
198 y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
199 if (x == -1 || y < x) x = y;
200 }
201 return (PyInt_FromLong(x));
202 }
203
204 static PyObject *ksget_max(PyObject *me, void *hunoz)
205 {
206 PyObject *set = ((keyszset_pyobj *)me)->set;
207 int i, n, y, x = -1;
208 n = PyTuple_GET_SIZE(set);
209 for (i = 0; i < n; i++) {
210 y = PyInt_AS_LONG(PyTuple_GET_ITEM(set, i));
211 if (y > x) x = y;
212 }
213 return (PyInt_FromLong(x));
214 }
215
216 static const PyMemberDef keysz_pymembers[] = {
217 #define MEMBERSTRUCT keysz_pyobj
218 #define default dfl /* ugh! */
219 MEMBER(default, T_INT, READONLY, "KSZ.default -> default key size")
220 #undef default
221 #undef MEMBERSTRUCT
222 { 0 }
223 };
224
225 #define KSZCONVOP(op) \
226 static PyObject *kszmeth_##op(PyObject *me, PyObject *arg) \
227 { \
228 double x, y; \
229 if (!PyArg_ParseTuple(arg, "d:" #op, &x)) return (0); \
230 y = keysz_##op(x); \
231 return (PyFloat_FromDouble(y)); \
232 }
233 KSZCONVOP(fromdl)
234 KSZCONVOP(fromschnorr)
235 KSZCONVOP(fromif)
236 KSZCONVOP(fromec)
237 KSZCONVOP(todl)
238 KSZCONVOP(toschnorr)
239 KSZCONVOP(toif)
240 KSZCONVOP(toec)
241 #undef KSZCONVOP
242
243 static const PyMethodDef keysz_pymethods[] = {
244 #define METHNAME(name) kszmeth_##name
245 SMTH (fromdl, "fromdl(N) -> M: "
246 "convert integer discrete log field size to work factor")
247 SMTH (fromschnorr, "fromschnorr(N) -> M: "
248 "convert Schnorr group order to work factor")
249 SMTH (fromif, "fromif(N) -> M: "
250 "convert integer factorization problem size to work factor")
251 SMTH (fromec, "fromec(N) -> M: "
252 "convert elliptic curve group order to work factor")
253 SMTH (todl, "todl(N) -> M: "
254 "convert work factor to integer discrete log field size")
255 SMTH (toschnorr, "toschnorr(N) -> M: "
256 "convert work factor to Schnorr group order")
257 SMTH (toif, "toif(N) -> M: "
258 "convert work factor to integer factorization problem size")
259 SMTH (toec, "toec(N) -> M: "
260 "convert work factor to elliptic curve group order")
261 SMTH (toec, "toec(N) -> M: "
262 "convert work factor to elliptic curve group order")
263 #undef METHNAME
264 { 0 }
265 };
266
267 static const PyGetSetDef keyszany_pygetset[] = {
268 #define GETSETNAME(op, name) ka##op##_##name
269 GET (min, "KSZ.min -> smallest allowed key size")
270 GET (max, "KSZ.max -> largest allowed key size")
271 #undef GETSETNAME
272 { 0 }
273 };
274
275 static const PyMemberDef keyszrange_pymembers[] = {
276 #define MEMBERSTRUCT keyszrange_pyobj
277 MEMBER(min, T_INT, READONLY, "KSZ.min -> smallest allowed key size")
278 MEMBER(max, T_INT, READONLY, "KSZ.max -> largest allowed key size")
279 MEMBER(mod, T_INT, READONLY,
280 "KSZ.mod -> key size must be a multiple of this")
281 #undef MEMBERSTRUCT
282 { 0 }
283 };
284
285 static const PyGetSetDef keyszset_pygetset[] = {
286 #define GETSETNAME(op, name) ks##op##_##name
287 GET (min, "KSZ.min -> smallest allowed key size")
288 GET (max, "KSZ.max -> largest allowed key size")
289 #undef GETSETNAME
290 { 0 }
291 };
292
293 static const PyMemberDef keyszset_pymembers[] = {
294 #define MEMBERSTRUCT keyszset_pyobj
295 MEMBER(set, T_OBJECT, READONLY, "KSZ.set -> allowed key sizes")
296 #undef MEMBERSTRUCT
297 { 0 }
298 };
299
300 static PyTypeObject keysz_pytype_skel = {
301 PyObject_HEAD_INIT(0) 0, /* Header */
302 "KeySZ", /* @tp_name@ */
303 sizeof(keysz_pyobj), /* @tp_basicsize@ */
304 0, /* @tp_itemsize@ */
305
306 0, /* @tp_dealloc@ */
307 0, /* @tp_print@ */
308 0, /* @tp_getattr@ */
309 0, /* @tp_setattr@ */
310 0, /* @tp_compare@ */
311 0, /* @tp_repr@ */
312 0, /* @tp_as_number@ */
313 0, /* @tp_as_sequence@ */
314 0, /* @tp_as_mapping@ */
315 0, /* @tp_hash@ */
316 0, /* @tp_call@ */
317 0, /* @tp_str@ */
318 0, /* @tp_getattro@ */
319 0, /* @tp_setattro@ */
320 0, /* @tp_as_buffer@ */
321 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
322 Py_TPFLAGS_BASETYPE,
323
324 /* @tp_doc@ */
325 "Key size constraints. Abstract.",
326
327 0, /* @tp_traverse@ */
328 0, /* @tp_clear@ */
329 0, /* @tp_richcompare@ */
330 0, /* @tp_weaklistoffset@ */
331 0, /* @tp_iter@ */
332 0, /* @tp_iternext@ */
333 PYMETHODS(keysz), /* @tp_methods@ */
334 PYMEMBERS(keysz), /* @tp_members@ */
335 0, /* @tp_getset@ */
336 0, /* @tp_base@ */
337 0, /* @tp_dict@ */
338 0, /* @tp_descr_get@ */
339 0, /* @tp_descr_set@ */
340 0, /* @tp_dictoffset@ */
341 0, /* @tp_init@ */
342 PyType_GenericAlloc, /* @tp_alloc@ */
343 abstract_pynew, /* @tp_new@ */
344 0, /* @tp_free@ */
345 0 /* @tp_is_gc@ */
346 };
347
348 static PyTypeObject keyszany_pytype_skel = {
349 PyObject_HEAD_INIT(0) 0, /* Header */
350 "KeySZAny", /* @tp_name@ */
351 sizeof(keysz_pyobj), /* @tp_basicsize@ */
352 0, /* @tp_itemsize@ */
353
354 0, /* @tp_dealloc@ */
355 0, /* @tp_print@ */
356 0, /* @tp_getattr@ */
357 0, /* @tp_setattr@ */
358 0, /* @tp_compare@ */
359 0, /* @tp_repr@ */
360 0, /* @tp_as_number@ */
361 0, /* @tp_as_sequence@ */
362 0, /* @tp_as_mapping@ */
363 0, /* @tp_hash@ */
364 0, /* @tp_call@ */
365 0, /* @tp_str@ */
366 0, /* @tp_getattro@ */
367 0, /* @tp_setattro@ */
368 0, /* @tp_as_buffer@ */
369 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
370 Py_TPFLAGS_BASETYPE,
371
372 /* @tp_doc@ */
373 "KeySZAny(DEFAULT)\n"
374 " Key size constraints. This object imposes no constraints on size.",
375
376 0, /* @tp_traverse@ */
377 0, /* @tp_clear@ */
378 0, /* @tp_richcompare@ */
379 0, /* @tp_weaklistoffset@ */
380 0, /* @tp_iter@ */
381 0, /* @tp_iternext@ */
382 0, /* @tp_methods@ */
383 0, /* @tp_members@ */
384 PYGETSET(keyszany), /* @tp_getset@ */
385 0, /* @tp_base@ */
386 0, /* @tp_dict@ */
387 0, /* @tp_descr_get@ */
388 0, /* @tp_descr_set@ */
389 0, /* @tp_dictoffset@ */
390 0, /* @tp_init@ */
391 PyType_GenericAlloc, /* @tp_alloc@ */
392 keyszany_pynew, /* @tp_new@ */
393 0, /* @tp_free@ */
394 0 /* @tp_is_gc@ */
395 };
396
397 static PyTypeObject keyszrange_pytype_skel = {
398 PyObject_HEAD_INIT(0) 0, /* Header */
399 "KeySZRange", /* @tp_name@ */
400 sizeof(keyszrange_pyobj), /* @tp_basicsize@ */
401 0, /* @tp_itemsize@ */
402
403 0, /* @tp_dealloc@ */
404 0, /* @tp_print@ */
405 0, /* @tp_getattr@ */
406 0, /* @tp_setattr@ */
407 0, /* @tp_compare@ */
408 0, /* @tp_repr@ */
409 0, /* @tp_as_number@ */
410 0, /* @tp_as_sequence@ */
411 0, /* @tp_as_mapping@ */
412 0, /* @tp_hash@ */
413 0, /* @tp_call@ */
414 0, /* @tp_str@ */
415 0, /* @tp_getattro@ */
416 0, /* @tp_setattro@ */
417 0, /* @tp_as_buffer@ */
418 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
419 Py_TPFLAGS_BASETYPE,
420
421 /* @tp_doc@ */
422 "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n"
423 " Key size constraints: size must be between MIN and MAX inclusive, and\n"
424 " be a multiple of MOD.",
425
426 0, /* @tp_traverse@ */
427 0, /* @tp_clear@ */
428 0, /* @tp_richcompare@ */
429 0, /* @tp_weaklistoffset@ */
430 0, /* @tp_iter@ */
431 0, /* @tp_iternext@ */
432 0, /* @tp_methods@ */
433 PYMEMBERS(keyszrange), /* @tp_members@ */
434 0, /* @tp_getset@ */
435 0, /* @tp_base@ */
436 0, /* @tp_dict@ */
437 0, /* @tp_descr_get@ */
438 0, /* @tp_descr_set@ */
439 0, /* @tp_dictoffset@ */
440 0, /* @tp_init@ */
441 PyType_GenericAlloc, /* @tp_alloc@ */
442 keyszrange_pynew, /* @tp_new@ */
443 0, /* @tp_free@ */
444 0 /* @tp_is_gc@ */
445 };
446
447 static PyTypeObject keyszset_pytype_skel = {
448 PyObject_HEAD_INIT(0) 0, /* Header */
449 "KeySZSet", /* @tp_name@ */
450 sizeof(keyszset_pyobj), /* @tp_basicsize@ */
451 0, /* @tp_itemsize@ */
452
453 0, /* @tp_dealloc@ */
454 0, /* @tp_print@ */
455 0, /* @tp_getattr@ */
456 0, /* @tp_setattr@ */
457 0, /* @tp_compare@ */
458 0, /* @tp_repr@ */
459 0, /* @tp_as_number@ */
460 0, /* @tp_as_sequence@ */
461 0, /* @tp_as_mapping@ */
462 0, /* @tp_hash@ */
463 0, /* @tp_call@ */
464 0, /* @tp_str@ */
465 0, /* @tp_getattro@ */
466 0, /* @tp_setattro@ */
467 0, /* @tp_as_buffer@ */
468 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
469 Py_TPFLAGS_BASETYPE,
470
471 /* @tp_doc@ */
472 "KeySZSet(DEFAULT, SEQ)\n"
473 " Key size constraints: size must be DEFAULT or an element of SEQ.",
474
475 0, /* @tp_traverse@ */
476 0, /* @tp_clear@ */
477 0, /* @tp_richcompare@ */
478 0, /* @tp_weaklistoffset@ */
479 0, /* @tp_iter@ */
480 0, /* @tp_iternext@ */
481 0, /* @tp_methods@ */
482 PYMEMBERS(keyszset), /* @tp_members@ */
483 PYGETSET(keyszset), /* @tp_getset@ */
484 0, /* @tp_base@ */
485 0, /* @tp_dict@ */
486 0, /* @tp_descr_get@ */
487 0, /* @tp_descr_set@ */
488 0, /* @tp_dictoffset@ */
489 0, /* @tp_init@ */
490 PyType_GenericAlloc, /* @tp_alloc@ */
491 keyszset_pynew, /* @tp_new@ */
492 0, /* @tp_free@ */
493 0 /* @tp_is_gc@ */
494 };
495
496 /*----- Symmetric encryption ----------------------------------------------*/
497
498 static PyTypeObject *gccipher_pytype, *gcipher_pytype;
499
500 typedef struct gccipher_pyobj {
501 PyHeapTypeObject ty;
502 gccipher *cc;
503 } gccipher_pyobj;
504
505 #define GCCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gccipher_pytype)
506 #define GCCIPHER_CC(o) (((gccipher_pyobj *)(o))->cc)
507
508 typedef struct gcipher_pyobj {
509 PyObject_HEAD
510 gcipher *c;
511 } gcipher_pyobj;
512
513 #define GCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gcipher_pytype)
514 #define GCIPHER_C(o) (((gcipher_pyobj *)(o))->c)
515
516 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
517
518 static PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
519 {
520 gcipher_pyobj *g;
521 if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
522 else Py_INCREF(cobj);
523 g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
524 g->c = c;
525 return ((PyObject *)g);
526 }
527
528 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
529 {
530 static const char *const kwlist[] = { "k", 0 };
531 char *k;
532 Py_ssize_t sz;
533
534 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
535 goto end;
536 if (keysz(sz, GCCIPHER_CC(ty)->keysz) != sz) VALERR("bad key length");
537 return (gcipher_pywrap((PyObject *)ty,
538 GC_INIT(GCCIPHER_CC(ty), k, sz)));
539 end:
540 return (0);
541 }
542
543 PyObject *gccipher_pywrap(gccipher *cc)
544 {
545 gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
546 g->cc = cc;
547 g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
548 g->ty.ht_type.tp_base = gcipher_pytype;
549 Py_INCREF(gcipher_pytype);
550 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
551 Py_TPFLAGS_BASETYPE |
552 Py_TPFLAGS_HEAPTYPE);
553 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
554 g->ty.ht_type.tp_free = 0;
555 g->ty.ht_type.tp_new = gcipher_pynew;
556 typeready(&g->ty.ht_type);
557 return ((PyObject *)g);
558 }
559
560 static void gcipher_pydealloc(PyObject *me)
561 {
562 GC_DESTROY(GCIPHER_C(me));
563 Py_DECREF(me->ob_type);
564 FREEOBJ(me);
565 }
566
567 static PyObject *gccget_name(PyObject *me, void *hunoz)
568 { return (PyString_FromString(GCCIPHER_CC(me)->name)); }
569
570 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
571 { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
572
573 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
574 { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
575
576 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
577 {
578 char *p;
579 Py_ssize_t sz;
580 PyObject *rc = 0;
581
582 if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &sz)) return (0);
583 rc = bytestring_pywrap(0, sz);
584 GC_ENCRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
585 return (rc);
586 }
587
588 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
589 {
590 char *p;
591 int sz;
592 PyObject *rc = 0;
593
594 if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
595 rc = bytestring_pywrap(0, sz);
596 p = PyString_AS_STRING(rc);
597 memset(p, 0, sz);
598 GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
599 return (rc);
600 }
601
602 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
603 {
604 char *p;
605 Py_ssize_t sz;
606 PyObject *rc = 0;
607
608 if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &sz)) return (0);
609 rc = bytestring_pywrap(0, sz);
610 GC_DECRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
611 return (rc);
612 }
613
614 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
615 {
616 char *p;
617 int sz;
618 PyObject *rc = 0;
619
620 if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
621 rc = bytestring_pywrap(0, sz);
622 p = PyString_AS_STRING(rc);
623 memset(p, 0, sz);
624 GC_DECRYPT(GCIPHER_C(me), p, p, sz);
625 return (rc);
626 }
627
628 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
629 {
630 char *p;
631 Py_ssize_t sz;
632
633 if (!PyArg_ParseTuple(arg, "s#:setiv", &p, &sz)) goto end;
634 if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
635 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
636 if (sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
637 GC_SETIV(GCIPHER_C(me), p);
638 RETURN_ME;
639 end:
640 return (0);
641 }
642
643 static PyObject *gcmeth_bdry(PyObject *me, PyObject *arg)
644 {
645 if (!PyArg_ParseTuple(arg, ":bdry")) goto end;
646 if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
647 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
648 GC_BDRY(GCIPHER_C(me));
649 RETURN_ME;
650 end:
651 return (0);
652 }
653
654 static const PyGetSetDef gccipher_pygetset[] = {
655 #define GETSETNAME(op, name) gcc##op##_##name
656 GET (keysz, "CC.keysz -> acceptable key sizes")
657 GET (blksz, "CC.blksz -> block size, or zero")
658 GET (name, "CC.name -> name of this kind of cipher")
659 #undef GETSETNAME
660 { 0 }
661 };
662
663 static const PyMethodDef gcipher_pymethods[] = {
664 #define METHNAME(name) gcmeth_##name
665 METH (encrypt, "C.encrypt(PT) -> CT")
666 METH (enczero, "C.enczero(N) -> CT")
667 METH (decrypt, "C.decrypt(CT) -> PT")
668 METH (deczero, "C.deczero(N) -> PT")
669 METH (setiv, "C.setiv(IV)")
670 METH (bdry, "C.bdry()")
671 #undef METHNAME
672 { 0 }
673 };
674
675 static PyTypeObject gccipher_pytype_skel = {
676 PyObject_HEAD_INIT(0) 0, /* Header */
677 "GCCipher", /* @tp_name@ */
678 sizeof(gccipher_pyobj), /* @tp_basicsize@ */
679 0, /* @tp_itemsize@ */
680
681 0, /* @tp_dealloc@ */
682 0, /* @tp_print@ */
683 0, /* @tp_getattr@ */
684 0, /* @tp_setattr@ */
685 0, /* @tp_compare@ */
686 0, /* @tp_repr@ */
687 0, /* @tp_as_number@ */
688 0, /* @tp_as_sequence@ */
689 0, /* @tp_as_mapping@ */
690 0, /* @tp_hash@ */
691 0, /* @tp_call@ */
692 0, /* @tp_str@ */
693 0, /* @tp_getattro@ */
694 0, /* @tp_setattro@ */
695 0, /* @tp_as_buffer@ */
696 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
697 Py_TPFLAGS_BASETYPE,
698
699 /* @tp_doc@ */
700 "Symmetric cipher metaclass.",
701
702 0, /* @tp_traverse@ */
703 0, /* @tp_clear@ */
704 0, /* @tp_richcompare@ */
705 0, /* @tp_weaklistoffset@ */
706 0, /* @tp_iter@ */
707 0, /* @tp_iternext@ */
708 0, /* @tp_methods@ */
709 0, /* @tp_members@ */
710 PYGETSET(gccipher), /* @tp_getset@ */
711 0, /* @tp_base@ */
712 0, /* @tp_dict@ */
713 0, /* @tp_descr_get@ */
714 0, /* @tp_descr_set@ */
715 0, /* @tp_dictoffset@ */
716 0, /* @tp_init@ */
717 PyType_GenericAlloc, /* @tp_alloc@ */
718 abstract_pynew, /* @tp_new@ */
719 0, /* @tp_free@ */
720 0 /* @tp_is_gc@ */
721 };
722
723 static PyTypeObject gcipher_pytype_skel = {
724 PyObject_HEAD_INIT(0) 0, /* Header */
725 "GCipher", /* @tp_name@ */
726 sizeof(gcipher_pyobj), /* @tp_basicsize@ */
727 0, /* @tp_itemsize@ */
728
729 gcipher_pydealloc, /* @tp_dealloc@ */
730 0, /* @tp_print@ */
731 0, /* @tp_getattr@ */
732 0, /* @tp_setattr@ */
733 0, /* @tp_compare@ */
734 0, /* @tp_repr@ */
735 0, /* @tp_as_number@ */
736 0, /* @tp_as_sequence@ */
737 0, /* @tp_as_mapping@ */
738 0, /* @tp_hash@ */
739 0, /* @tp_call@ */
740 0, /* @tp_str@ */
741 0, /* @tp_getattro@ */
742 0, /* @tp_setattro@ */
743 0, /* @tp_as_buffer@ */
744 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
745 Py_TPFLAGS_BASETYPE,
746
747 /* @tp_doc@ */
748 "Symmetric cipher, abstract base class.",
749
750 0, /* @tp_traverse@ */
751 0, /* @tp_clear@ */
752 0, /* @tp_richcompare@ */
753 0, /* @tp_weaklistoffset@ */
754 0, /* @tp_iter@ */
755 0, /* @tp_iternext@ */
756 PYMETHODS(gcipher), /* @tp_methods@ */
757 0, /* @tp_members@ */
758 0, /* @tp_getset@ */
759 0, /* @tp_base@ */
760 0, /* @tp_dict@ */
761 0, /* @tp_descr_get@ */
762 0, /* @tp_descr_set@ */
763 0, /* @tp_dictoffset@ */
764 0, /* @tp_init@ */
765 PyType_GenericAlloc, /* @tp_alloc@ */
766 abstract_pynew, /* @tp_new@ */
767 0, /* @tp_free@ */
768 0 /* @tp_is_gc@ */
769 };
770
771 /*----- Authenticated encryption ------------------------------------------*/
772
773 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
774 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
775 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
776 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
777
778 typedef struct gcaead_pyobj {
779 PyHeapTypeObject ty;
780 gcaead *aec;
781 struct gcaeadaad_pyobj *aad;
782 struct gcaeadenc_pyobj *enc;
783 struct gcaeaddec_pyobj *dec;
784 } gcaead_pyobj;
785
786 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
787 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
788 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
789 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
790 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
791 static PyObject *gcaead_pywrap(gcaead *);
792
793 typedef struct gaeadkey_pyobj {
794 PyObject_HEAD
795 gaead_key *k;
796 } gaeadkey_pyobj;
797
798 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
799 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
800
801 typedef struct gcaeadaad_pyobj {
802 PyHeapTypeObject ty;
803 gcaead_pyobj *key;
804 } gcaeadaad_pyobj;
805
806 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
807 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
808
809 typedef struct gaeadaad_pyobj {
810 PyObject_HEAD
811 gaead_aad *a;
812 unsigned f;
813 #define AEADF_DEAD 32768u
814 size_t hsz, hlen;
815 } gaeadaad_pyobj;
816
817 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
818 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
819 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
820 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
821 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
822
823 typedef struct gcaeadenc_pyobj {
824 PyHeapTypeObject ty;
825 gcaead_pyobj *key;
826 } gcaeadenc_pyobj;
827
828 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
829 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
830 size_t, size_t, size_t);
831
832 typedef struct gaeadenc_pyobj {
833 PyObject_HEAD
834 gaead_enc *e;
835 gaeadaad_pyobj *aad;
836 unsigned f;
837 size_t hsz, msz, tsz;
838 size_t mlen;
839 } gaeadenc_pyobj;
840
841 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
842 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
843 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
844 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
845 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
846 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
847 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
848 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
849
850 typedef struct gcaeaddec_pyobj {
851 PyHeapTypeObject ty;
852 gcaead_pyobj *key;
853 } gcaeaddec_pyobj;
854
855 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
856 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
857 size_t, size_t, size_t);
858
859 typedef struct gaeaddec_pyobj {
860 PyObject_HEAD
861 gaead_dec *d;
862 gaeadaad_pyobj *aad;
863 unsigned f;
864 size_t hsz, csz, tsz;
865 size_t clen;
866 } gaeaddec_pyobj;
867
868 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
869 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
870 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
871 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
872 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
873 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
874 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
875 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
876
877 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
878 {
879 gaeadkey_pyobj *gk;
880
881 if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
882 else Py_INCREF(cobj);
883 gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
884 gk->k = k;
885 return ((PyObject *)gk);
886 }
887
888 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
889 PyObject *arg, PyObject *kw)
890 {
891 static const char *const kwlist[] = { "k", 0 };
892 char *k;
893 Py_ssize_t sz;
894
895 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
896 goto end;
897 if (keysz(sz, GCAEAD_AEC(ty)->keysz) != sz) VALERR("bad key length");
898 return (gaeadkey_pywrap((PyObject *)ty,
899 GAEAD_KEY(GCAEAD_AEC(ty), k, sz)));
900 end:
901 return (0);
902 }
903
904 static PyObject *gcaead_pywrap(gcaead *aec)
905 {
906 gcaead_pyobj *gck;
907 gcaeadaad_pyobj *gca;
908 gcaeadenc_pyobj *gce;
909 gcaeaddec_pyobj *gcd;
910
911 #define MKTYPE(obj, thing, newfn, namefmt) do { \
912 (obj) = newtype(gcaead_pytype, 0, 0); \
913 (obj)->ty.ht_name = PyString_FromFormat(namefmt, aec->name); \
914 (obj)->ty.ht_type.tp_name = PyString_AS_STRING((obj)->ty.ht_name); \
915 (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj); \
916 (obj)->ty.ht_type.tp_base = gaead##thing##_pytype; \
917 Py_INCREF(gaead##thing##_pytype); \
918 (obj)->ty.ht_type.tp_flags = \
919 (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE); \
920 (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc; \
921 (obj)->ty.ht_type.tp_free = 0; \
922 (obj)->ty.ht_type.tp_new = newfn; \
923 typeready(&(obj)->ty.ht_type); \
924 } while (0)
925
926 MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
927 MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
928 MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
929 MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
930
931 #undef MKTYPE
932
933 gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
934 gca->key = gce->key = gcd->key = gck;
935 return ((PyObject *)gck);
936 }
937
938 static void gaeadkey_pydealloc(PyObject *me)
939 { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(me->ob_type); FREEOBJ(me); }
940
941 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
942 { return (PyString_FromString(GCAEAD_AEC(me)->name)); }
943
944 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
945 { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
946
947 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
948 { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
949
950 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
951 { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
952
953 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
954 { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
955
956 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
957 { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
958
959 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
960 { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
961
962 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
963 { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
964
965 static const PyGetSetDef gcaead_pygetset[] = {
966 #define GETSETNAME(op, name) gcae##op##_##name
967 GET (keysz, "AEC.keysz -> acceptable key sizes")
968 GET (noncesz, "AEC.noncesz -> acceptable nonce sizes")
969 GET (tagsz, "AEC.tagsz -> acceptable tag sizes")
970 GET (blksz, "AEC.blksz -> block size, or zero")
971 GET (bufsz, "AEC.bufsz -> amount of data buffered internally")
972 GET (ohd, "AEC.ohd -> maximum encryption overhead")
973 GET (name, "AEC.name -> name of this kind of AEAD scheme")
974 GET (flags, "AEC.flags -> mask of `AEADF_...' flags")
975 #undef GETSETNAME
976 { 0 }
977 };
978
979 static PyObject *gaekmeth_aad(PyObject *me, PyObject *arg)
980 {
981 const gaead_key *k = GAEADKEY_K(me);
982 PyObject *rc = 0;
983
984 if (!PyArg_ParseTuple(arg, ":aad")) return (0);
985 if (k->ops->c->f&AEADF_AADNDEP)
986 VALERR("aad must be associated with enc/dec op");
987 rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(me->ob_type),
988 GAEAD_AAD(k), 0, 0);
989 end:
990 return (rc);
991 }
992
993 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
994 PyObject *hszobj, size_t *hsz_out,
995 PyObject *mszobj, size_t *msz_out,
996 PyObject *tszobj, size_t *tsz_out)
997 {
998 unsigned f = 0, miss;
999 int rc = -1;
1000
1001 if (hszobj != Py_None)
1002 { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
1003 if (mszobj != Py_None)
1004 { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
1005 if (tszobj != Py_None)
1006 { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
1007 miss = aec->f&~f;
1008 if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1009 if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1010 if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1011 if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1012 if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1013 VALERR("bad tag length");
1014 *f_out = f | aec->f; rc = 0;
1015 end:
1016 return (rc);
1017 }
1018
1019 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1020 {
1021 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1022 const gaead_key *k = GAEADKEY_K(me);
1023 gaead_enc *e;
1024 PyObject *rc = 0;
1025 char *n; Py_ssize_t nsz;
1026 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1027 size_t hsz = 0, msz = 0, tsz = 0;
1028 unsigned f;
1029
1030 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1031 &n, &nsz, &hszobj, &mszobj, &tszobj))
1032 goto end;
1033 if (check_aead_encdec(k->ops->c, &f, nsz,
1034 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1035 goto end;
1036 e = GAEAD_ENC(GAEADKEY_K(me), n, nsz, hsz, msz, tsz);
1037 if (!e) VALERR("bad aead parameter combination");
1038 rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(me->ob_type),
1039 e, f, hsz, msz, tsz);
1040 end:
1041 return (rc);
1042 }
1043
1044 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1045 {
1046 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1047 const gaead_key *k = GAEADKEY_K(me);
1048 gaead_dec *d;
1049 PyObject *rc = 0;
1050 char *n; Py_ssize_t nsz;
1051 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1052 size_t hsz = 0, csz = 0, tsz = 0;
1053 unsigned f;
1054
1055 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:dec", KWLIST,
1056 &n, &nsz, &hszobj, &cszobj, &tszobj))
1057 goto end;
1058 if (check_aead_encdec(k->ops->c, &f, nsz,
1059 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1060 goto end;
1061 d = GAEAD_DEC(GAEADKEY_K(me), n, nsz, hsz, csz, tsz);
1062 if (!d) VALERR("bad aead parameter combination");
1063 rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(me->ob_type),
1064 d, f, hsz, csz, tsz);
1065 end:
1066 return (rc);
1067 }
1068
1069 static const PyMethodDef gaeadkey_pymethods[] = {
1070 #define METHNAME(name) gaekmeth_##name
1071 METH (aad, "KEY.aad() -> AAD")
1072 KWMETH(enc, "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1073 KWMETH(dec, "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1074 #undef METHNAME
1075 { 0 }
1076 };
1077
1078 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1079 unsigned f, size_t hsz)
1080 {
1081 gaeadaad_pyobj *ga;
1082
1083 assert(cobj); Py_INCREF(cobj);
1084 ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1085 ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1086 return ((PyObject *)ga);
1087 }
1088
1089 static void gaeadaad_pydealloc(PyObject *me)
1090 {
1091 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1092
1093 if (ga->a) GAEAD_DESTROY(ga->a);
1094 Py_DECREF(me->ob_type); FREEOBJ(me);
1095 }
1096
1097 static int gaea_check(PyObject *me)
1098 {
1099 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1100 int rc = -1;
1101
1102 if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1103 rc = 0;
1104 end:
1105 return (rc);
1106 }
1107
1108 static void gaea_invalidate(gaeadaad_pyobj *ga)
1109 { if (ga) ga->f |= AEADF_DEAD; }
1110
1111 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1112 {
1113 gaeadaad_pyobj *ga = *ga_inout;
1114 if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1115 }
1116
1117 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1118 {
1119 if (gaea_check(me)) return (0);
1120 else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1121 else RETURN_NONE;
1122 }
1123
1124 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1125 { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1126
1127 static const PyGetSetDef gaeadaad_pygetset[] = {
1128 #define GETSETNAME(op, name) gaea##op##_##name
1129 GET (hsz, "AAD.hsz -> precommitted header length or `None'")
1130 GET (hlen, "AAD.hlen -> header length so far")
1131 #undef GETSETNAME
1132 { 0 }
1133 };
1134
1135 static PyObject *gaeameth_copy(PyObject *me, PyObject *arg)
1136 {
1137 PyObject *rc = 0;
1138
1139 if (!PyArg_ParseTuple(arg, ":copy")) goto end;
1140 if (gaea_check(me)) goto end;
1141 if (GAEADAAD_F(me)&AEADF_AADNDEP)
1142 VALERR("can't duplicate nonce-dependent aad");
1143 rc = gaeadaad_pywrap((PyObject *)me->ob_type,
1144 GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1145 GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1146 end:
1147 return (rc);
1148 }
1149
1150 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1151 {
1152 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1153 int rc = -1;
1154
1155 if (gaea_check(me)) goto end;
1156 if ((ga->f&AEADF_NOAAD) && hsz)
1157 VALERR("header data not permitted");
1158 if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1159 VALERR("too large for precommitted header length");
1160 GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1161 rc = 0;
1162 end:
1163 return (rc);
1164 }
1165
1166
1167 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1168 {
1169 char *h; Py_ssize_t hsz;
1170
1171 if (!PyArg_ParseTuple(arg, "s#:hash", &h, &hsz)) return (0);
1172 if (gaeadaad_hash(me, h, hsz)) return (0);
1173 RETURN_ME;
1174 }
1175
1176 #define GAEAMETH_HASHU_(n, W, w) \
1177 static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg) \
1178 { \
1179 uint##n x; octet b[SZ_##W]; \
1180 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1181 STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0); \
1182 RETURN_ME; \
1183 }
1184 DOUINTCONV(GAEAMETH_HASHU_)
1185
1186 #define GAEAMETH_HASHBUF_(n, W, w) \
1187 static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg) \
1188 { \
1189 char *p; Py_ssize_t sz; octet b[SZ_##W]; \
1190 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
1191 if (sz > MASK##n) TYERR("string too long"); \
1192 STORE##W(b, sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end; \
1193 if (gaeadaad_hash(me, p, sz)) goto end; \
1194 RETURN_ME; \
1195 end: \
1196 return (0); \
1197 }
1198 DOUINTCONV(GAEAMETH_HASHBUF_)
1199
1200 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1201 {
1202 char *p;
1203 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1204 if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1205 RETURN_ME;
1206 }
1207
1208 static const PyMethodDef gaeadaad_pymethods[] = {
1209 #define METHNAME(name) gaeameth_##name
1210 METH (copy, "AAD.copy() -> AAD'")
1211 METH (hash, "AAD.hash(H)")
1212 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1213 DOUINTCONV(METHU_)
1214 #undef METHU_
1215 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1216 DOUINTCONV(METHBUF_)
1217 #undef METHBUF_
1218 METH (hashstrz, "AAD.hashstrz(STRING)")
1219 #undef METHNAME
1220 { 0 }
1221 };
1222
1223 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1224 size_t hsz, size_t msz, size_t tsz)
1225 {
1226 gaeadenc_pyobj *ge;
1227
1228 assert(cobj); Py_INCREF(cobj);
1229 ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1230 ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1231 ge->aad = 0; ge->mlen = 0;
1232 return ((PyObject *)ge);
1233 }
1234
1235 static void gaeadenc_pydealloc(PyObject *me)
1236 {
1237 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1238
1239 gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1240 Py_DECREF(me->ob_type); FREEOBJ(me);
1241 }
1242
1243 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1244 {
1245 if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1246 else RETURN_NONE;
1247 }
1248
1249 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1250 {
1251 if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1252 else RETURN_NONE;
1253 }
1254
1255 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1256 {
1257 if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1258 else RETURN_NONE;
1259 }
1260
1261 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1262 { return getulong(GAEADENC_MLEN(me)); }
1263
1264 static const PyGetSetDef gaeadenc_pygetset[] = {
1265 #define GETSETNAME(op, name) gaee##op##_##name
1266 GET (hsz, "ENC.hsz -> precommitted header length or `None'")
1267 GET (msz, "ENC.msz -> precommitted message length or `None'")
1268 GET (tsz, "ENC.tsz -> precommitted tag length or `None'")
1269 GET (mlen, "ENC.mlen -> message length so far")
1270 #undef GETSETNAME
1271 { 0 }
1272 };
1273
1274 static PyObject *gaeemeth_aad(PyObject *me, PyObject *arg)
1275 {
1276 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1277 PyObject *rc = 0;
1278
1279 if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1280 if (!(ge->f&AEADF_AADNDEP))
1281 rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1282 GAEAD_AAD(ge->e), 0, 0);
1283 else {
1284 if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1285 VALERR("too late for aad");
1286 if (!ge->aad)
1287 ge->aad = (gaeadaad_pyobj *)
1288 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1289 GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1290 ge->hsz);
1291 Py_INCREF(ge->aad);
1292 rc = (PyObject *)ge->aad;
1293 }
1294 end:
1295 return (rc);
1296 }
1297
1298 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1299 {
1300 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1301 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1302 char *n; Py_ssize_t nsz;
1303 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1304 size_t hsz = 0, msz = 0, tsz = 0;
1305 unsigned f;
1306
1307 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1308 &n, &nsz, &hszobj, &mszobj, &tszobj))
1309 goto end;
1310 if (check_aead_encdec(ge->e->ops->c, &f, nsz,
1311 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1312 goto end;
1313 if (GAEAD_REINIT(ge->e, n, nsz, hsz, msz, tsz))
1314 VALERR("bad aead parameter combination");
1315 gaea_sever(&ge->aad);
1316 ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1317 end:
1318 return (0);
1319 }
1320
1321 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1322 {
1323 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1324 char *m; Py_ssize_t msz;
1325 char *c = 0; size_t csz; buf b;
1326 int err;
1327 PyObject *rc = 0;
1328
1329 if (!PyArg_ParseTuple(arg, "s#:encrypt", &m, &msz)) goto end;
1330 if (ge->f&AEADF_AADFIRST) {
1331 if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1332 VALERR("header doesn't match precommitted length");
1333 gaea_invalidate(ge->aad);
1334 }
1335 if ((ge->f&AEADF_PCMSZ) && msz > ge->msz - ge->mlen)
1336 VALERR("too large for precommitted message length");
1337 csz = msz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1338 err = GAEAD_ENCRYPT(ge->e, m, msz, &b); assert(!err); (void)err;
1339 buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += msz;
1340 end:
1341 xfree(c);
1342 return (rc);
1343 }
1344
1345 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1346 {
1347 static const char *const kwlist[] = { "tsz", "aad", 0 };
1348 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1349 PyObject *aad = Py_None;
1350 char *c = 0; size_t csz; buf b;
1351 PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1352 int err;
1353 PyObject *rc = 0;
1354
1355 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1356 &tszobj, &aad))
1357 goto end;
1358 if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1359 if (aad != Py_None &&
1360 !PyObject_TypeCheck(aad,
1361 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1362 TYERR("wanted aad");
1363 if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1364 VALERR("mismatched aad");
1365 if ((ge->f&AEADF_PCHSZ) &&
1366 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1367 VALERR("header doesn't match precommitted length");
1368 if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1369 VALERR("message doesn't match precommitted length");
1370 if (tszobj == Py_None) {
1371 if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1372 else tsz = keysz(0, ge->e->ops->c->tagsz);
1373 } else {
1374 if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1375 VALERR("tag length doesn't match precommitted value");
1376 if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1377 }
1378 csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1379 tag = bytestring_pywrap(0, tsz);
1380 err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1381 PyString_AS_STRING(tag), tsz);
1382 assert(!err); (void)err;
1383 buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1384 end:
1385 xfree(c);
1386 return (rc);
1387 }
1388
1389 static const PyMethodDef gaeadenc_pymethods[] = {
1390 #define METHNAME(name) gaeemeth_##name
1391 METH (aad, "ENC.aad() -> AAD")
1392 KWMETH(reinit, "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1393 METH (encrypt, "ENC.encrypt(MSG) -> CT")
1394 KWMETH(done, "ENC.done([tsz], [aad]) -> CT, TAG")
1395 #undef METHNAME
1396 { 0 }
1397 };
1398
1399 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1400 size_t hsz, size_t csz, size_t tsz)
1401 {
1402 gaeaddec_pyobj *gd;
1403 assert(cobj); Py_INCREF(cobj);
1404 gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1405 gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1406 gd->aad = 0; gd->clen = 0;
1407 return ((PyObject *)gd);
1408 }
1409
1410 static void gaeaddec_pydealloc(PyObject *me)
1411 {
1412 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1413
1414 gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1415 Py_DECREF(me->ob_type); FREEOBJ(me);
1416 }
1417
1418 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1419 {
1420 if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1421 else RETURN_NONE;
1422 }
1423
1424 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1425 {
1426 if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1427 else RETURN_NONE;
1428 }
1429
1430 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1431 {
1432 if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1433 else RETURN_NONE;
1434 }
1435
1436 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1437 { return getulong(GAEADDEC_CLEN(me)); }
1438
1439 static const PyGetSetDef gaeaddec_pygetset[] = {
1440 #define GETSETNAME(op, name) gaed##op##_##name
1441 GET (hsz, "DEC.hsz -> precommitted header length or `None'")
1442 GET (csz, "DEC.csz -> precommitted ciphertext length or `None'")
1443 GET (tsz, "DEC.tsz -> precommitted tag length or `None'")
1444 GET (clen, "DEC.clen -> ciphertext length so far")
1445 #undef GETSETNAME
1446 { 0 }
1447 };
1448
1449 static PyObject *gaedmeth_aad(PyObject *me, PyObject *arg)
1450 {
1451 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1452
1453 if (!PyArg_ParseTuple(arg, ":aad")) return (0);
1454 if (!(gd->f&AEADF_AADNDEP))
1455 return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(gd->ob_type)->aad,
1456 GAEAD_AAD(gd->d), 0, 0));
1457 else {
1458 if (!gd->aad)
1459 gd->aad = (gaeadaad_pyobj *)
1460 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(gd->ob_type)->aad,
1461 GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1462 gd->hsz);
1463 Py_INCREF(gd->aad);
1464 return ((PyObject *)gd->aad);
1465 }
1466 }
1467
1468 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1469 {
1470 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1471 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1472 char *n; Py_ssize_t nsz;
1473 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1474 size_t hsz = 0, csz = 0, tsz = 0;
1475 unsigned f;
1476
1477 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1478 &n, &nsz, &hszobj, &cszobj, &tszobj))
1479 goto end;
1480 if (check_aead_encdec(gd->d->ops->c, &f, nsz,
1481 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1482 goto end;
1483 if (GAEAD_REINIT(gd->d, n, nsz, hsz, csz, tsz))
1484 VALERR("bad aead parameter combination");
1485 gaea_sever(&gd->aad);
1486 gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1487 end:
1488 return (0);
1489 }
1490
1491 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1492 {
1493 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1494 char *c; Py_ssize_t csz;
1495 char *m = 0; size_t msz; buf b;
1496 int err;
1497 PyObject *rc = 0;
1498
1499 if (!PyArg_ParseTuple(arg, "s#:decrypt", &c, &csz)) goto end;
1500 if (gd->f&AEADF_AADFIRST) {
1501 if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1502 VALERR("header doesn't match precommitted length");
1503 gaea_invalidate(gd->aad);
1504 }
1505 if ((gd->f&AEADF_PCMSZ) && csz > gd->csz - gd->clen)
1506 VALERR("too large for precommitted message length");
1507 msz = csz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1508 err = GAEAD_DECRYPT(gd->d, c, csz, &b); assert(!err); (void)err;
1509 buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += csz;
1510 end:
1511 xfree(m);
1512 return (rc);
1513 }
1514
1515 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1516 {
1517 static const char *const kwlist[] = { "tag", "aad", 0 };
1518 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1519 PyObject *aad = Py_None;
1520 char *t; Py_ssize_t tsz;
1521 char *m = 0; size_t msz; buf b;
1522 int err;
1523 PyObject *rc = 0;
1524
1525 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O:done", KWLIST,
1526 &t, &tsz, &aad))
1527 goto end;
1528 if (aad != Py_None &&
1529 !PyObject_TypeCheck(aad,
1530 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1531 TYERR("wanted aad");
1532 if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1533 VALERR("mismatched aad");
1534 if ((gd->f&AEADF_PCHSZ) &&
1535 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1536 VALERR("header doesn't match precommitted length");
1537 if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1538 VALERR("message doesn't match precommitted length");
1539 if ((gd->f&AEADF_PCTSZ) && tsz != gd->tsz)
1540 VALERR("tag length doesn't match precommitted value");
1541 if (keysz(tsz, gd->d->ops->c->tagsz) != tsz) VALERR("bad tag length");
1542 msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1543 err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad), &b, t, tsz);
1544 assert(err >= 0);
1545 if (!err) VALERR("decryption failed");
1546 buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1547 end:
1548 xfree(m);
1549 return (rc);
1550 }
1551
1552 static const PyMethodDef gaeaddec_pymethods[] = {
1553 #define METHNAME(name) gaedmeth_##name
1554 METH (aad, "DEC.aad() -> AAD")
1555 KWMETH(reinit, "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1556 METH (decrypt, "DEC.decrypt(CT) -> MSG")
1557 KWMETH(done, "DEC.done(TAG, [aad]) -> MSG | None")
1558 #undef METHNAME
1559 { 0 }
1560 };
1561
1562 static PyTypeObject gcaead_pytype_skel = {
1563 PyObject_HEAD_INIT(0) 0, /* Header */
1564 "GCAEAD", /* @tp_name@ */
1565 sizeof(gcaead_pyobj), /* @tp_basicsize@ */
1566 0, /* @tp_itemsize@ */
1567
1568 0, /* @tp_dealloc@ */
1569 0, /* @tp_print@ */
1570 0, /* @tp_getattr@ */
1571 0, /* @tp_setattr@ */
1572 0, /* @tp_compare@ */
1573 0, /* @tp_repr@ */
1574 0, /* @tp_as_number@ */
1575 0, /* @tp_as_sequence@ */
1576 0, /* @tp_as_mapping@ */
1577 0, /* @tp_hash@ */
1578 0, /* @tp_call@ */
1579 0, /* @tp_str@ */
1580 0, /* @tp_getattro@ */
1581 0, /* @tp_setattro@ */
1582 0, /* @tp_as_buffer@ */
1583 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1584 Py_TPFLAGS_BASETYPE,
1585
1586 /* @tp_doc@ */
1587 "Authenticated encryption (key) metaclass.",
1588
1589 0, /* @tp_traverse@ */
1590 0, /* @tp_clear@ */
1591 0, /* @tp_richcompare@ */
1592 0, /* @tp_weaklistoffset@ */
1593 0, /* @tp_iter@ */
1594 0, /* @tp_iternext@ */
1595 0, /* @tp_methods@ */
1596 0, /* @tp_members@ */
1597 PYGETSET(gcaead), /* @tp_getset@ */
1598 0, /* @tp_base@ */
1599 0, /* @tp_dict@ */
1600 0, /* @tp_descr_get@ */
1601 0, /* @tp_descr_set@ */
1602 0, /* @tp_dictoffset@ */
1603 0, /* @tp_init@ */
1604 PyType_GenericAlloc, /* @tp_alloc@ */
1605 abstract_pynew, /* @tp_new@ */
1606 0, /* @tp_free@ */
1607 0 /* @tp_is_gc@ */
1608 };
1609
1610 static PyTypeObject gaeadkey_pytype_skel = {
1611 PyObject_HEAD_INIT(0) 0, /* Header */
1612 "GAEKey", /* @tp_name@ */
1613 sizeof(gaeadkey_pyobj), /* @tp_basicsize@ */
1614 0, /* @tp_itemsize@ */
1615
1616 gaeadkey_pydealloc, /* @tp_dealloc@ */
1617 0, /* @tp_print@ */
1618 0, /* @tp_getattr@ */
1619 0, /* @tp_setattr@ */
1620 0, /* @tp_compare@ */
1621 0, /* @tp_repr@ */
1622 0, /* @tp_as_number@ */
1623 0, /* @tp_as_sequence@ */
1624 0, /* @tp_as_mapping@ */
1625 0, /* @tp_hash@ */
1626 0, /* @tp_call@ */
1627 0, /* @tp_str@ */
1628 0, /* @tp_getattro@ */
1629 0, /* @tp_setattro@ */
1630 0, /* @tp_as_buffer@ */
1631 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1632 Py_TPFLAGS_BASETYPE,
1633
1634 /* @tp_doc@ */
1635 "Authenticated encryption key.",
1636
1637 0, /* @tp_traverse@ */
1638 0, /* @tp_clear@ */
1639 0, /* @tp_richcompare@ */
1640 0, /* @tp_weaklistoffset@ */
1641 0, /* @tp_iter@ */
1642 0, /* @tp_iternext@ */
1643 PYMETHODS(gaeadkey), /* @tp_methods@ */
1644 0, /* @tp_members@ */
1645 0, /* @tp_getset@ */
1646 0, /* @tp_base@ */
1647 0, /* @tp_dict@ */
1648 0, /* @tp_descr_get@ */
1649 0, /* @tp_descr_set@ */
1650 0, /* @tp_dictoffset@ */
1651 0, /* @tp_init@ */
1652 PyType_GenericAlloc, /* @tp_alloc@ */
1653 abstract_pynew, /* @tp_new@ */
1654 0, /* @tp_free@ */
1655 0 /* @tp_is_gc@ */
1656 };
1657
1658 static PyTypeObject gcaeadaad_pytype_skel = {
1659 PyObject_HEAD_INIT(0) 0, /* Header */
1660 "GAEAADClass", /* @tp_name@ */
1661 sizeof(gcaeadaad_pyobj), /* @tp_basicsize@ */
1662 0, /* @tp_itemsize@ */
1663
1664 0, /* @tp_dealloc@ */
1665 0, /* @tp_print@ */
1666 0, /* @tp_getattr@ */
1667 0, /* @tp_setattr@ */
1668 0, /* @tp_compare@ */
1669 0, /* @tp_repr@ */
1670 0, /* @tp_as_number@ */
1671 0, /* @tp_as_sequence@ */
1672 0, /* @tp_as_mapping@ */
1673 0, /* @tp_hash@ */
1674 0, /* @tp_call@ */
1675 0, /* @tp_str@ */
1676 0, /* @tp_getattro@ */
1677 0, /* @tp_setattro@ */
1678 0, /* @tp_as_buffer@ */
1679 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1680 Py_TPFLAGS_BASETYPE,
1681
1682 /* @tp_doc@ */
1683 "Authenticated encryption additional-data hash metaclass.",
1684
1685 0, /* @tp_traverse@ */
1686 0, /* @tp_clear@ */
1687 0, /* @tp_richcompare@ */
1688 0, /* @tp_weaklistoffset@ */
1689 0, /* @tp_iter@ */
1690 0, /* @tp_iternext@ */
1691 0, /* @tp_methods@ */
1692 0, /* @tp_members@ */
1693 0, /* @tp_getset@ */
1694 0, /* @tp_base@ */
1695 0, /* @tp_dict@ */
1696 0, /* @tp_descr_get@ */
1697 0, /* @tp_descr_set@ */
1698 0, /* @tp_dictoffset@ */
1699 0, /* @tp_init@ */
1700 PyType_GenericAlloc, /* @tp_alloc@ */
1701 abstract_pynew, /* @tp_new@ */
1702 0, /* @tp_free@ */
1703 0 /* @tp_is_gc@ */
1704 };
1705
1706 static PyTypeObject gaeadaad_pytype_skel = {
1707 PyObject_HEAD_INIT(0) 0, /* Header */
1708 "GAEAAD", /* @tp_name@ */
1709 sizeof(gaeadaad_pyobj), /* @tp_basicsize@ */
1710 0, /* @tp_itemsize@ */
1711
1712 gaeadaad_pydealloc, /* @tp_dealloc@ */
1713 0, /* @tp_print@ */
1714 0, /* @tp_getattr@ */
1715 0, /* @tp_setattr@ */
1716 0, /* @tp_compare@ */
1717 0, /* @tp_repr@ */
1718 0, /* @tp_as_number@ */
1719 0, /* @tp_as_sequence@ */
1720 0, /* @tp_as_mapping@ */
1721 0, /* @tp_hash@ */
1722 0, /* @tp_call@ */
1723 0, /* @tp_str@ */
1724 0, /* @tp_getattro@ */
1725 0, /* @tp_setattro@ */
1726 0, /* @tp_as_buffer@ */
1727 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1728 Py_TPFLAGS_BASETYPE,
1729
1730 /* @tp_doc@ */
1731 "Authenticated encryption AAD hash.",
1732
1733 0, /* @tp_traverse@ */
1734 0, /* @tp_clear@ */
1735 0, /* @tp_richcompare@ */
1736 0, /* @tp_weaklistoffset@ */
1737 0, /* @tp_iter@ */
1738 0, /* @tp_iternext@ */
1739 PYMETHODS(gaeadaad), /* @tp_methods@ */
1740 0, /* @tp_members@ */
1741 PYGETSET(gaeadaad), /* @tp_getset@ */
1742 0, /* @tp_base@ */
1743 0, /* @tp_dict@ */
1744 0, /* @tp_descr_get@ */
1745 0, /* @tp_descr_set@ */
1746 0, /* @tp_dictoffset@ */
1747 0, /* @tp_init@ */
1748 PyType_GenericAlloc, /* @tp_alloc@ */
1749 abstract_pynew, /* @tp_new@ */
1750 0, /* @tp_free@ */
1751 0 /* @tp_is_gc@ */
1752 };
1753
1754 static PyTypeObject gcaeadenc_pytype_skel = {
1755 PyObject_HEAD_INIT(0) 0, /* Header */
1756 "GAEEncClass", /* @tp_name@ */
1757 sizeof(gcaeadenc_pyobj), /* @tp_basicsize@ */
1758 0, /* @tp_itemsize@ */
1759
1760 0, /* @tp_dealloc@ */
1761 0, /* @tp_print@ */
1762 0, /* @tp_getattr@ */
1763 0, /* @tp_setattr@ */
1764 0, /* @tp_compare@ */
1765 0, /* @tp_repr@ */
1766 0, /* @tp_as_number@ */
1767 0, /* @tp_as_sequence@ */
1768 0, /* @tp_as_mapping@ */
1769 0, /* @tp_hash@ */
1770 0, /* @tp_call@ */
1771 0, /* @tp_str@ */
1772 0, /* @tp_getattro@ */
1773 0, /* @tp_setattro@ */
1774 0, /* @tp_as_buffer@ */
1775 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1776 Py_TPFLAGS_BASETYPE,
1777
1778 /* @tp_doc@ */
1779 "Authenticated encryption operation metaclass.",
1780
1781 0, /* @tp_traverse@ */
1782 0, /* @tp_clear@ */
1783 0, /* @tp_richcompare@ */
1784 0, /* @tp_weaklistoffset@ */
1785 0, /* @tp_iter@ */
1786 0, /* @tp_iternext@ */
1787 0, /* @tp_methods@ */
1788 0, /* @tp_members@ */
1789 0, /* @tp_getset@ */
1790 0, /* @tp_base@ */
1791 0, /* @tp_dict@ */
1792 0, /* @tp_descr_get@ */
1793 0, /* @tp_descr_set@ */
1794 0, /* @tp_dictoffset@ */
1795 0, /* @tp_init@ */
1796 PyType_GenericAlloc, /* @tp_alloc@ */
1797 abstract_pynew, /* @tp_new@ */
1798 0, /* @tp_free@ */
1799 0 /* @tp_is_gc@ */
1800 };
1801
1802 static PyTypeObject gaeadenc_pytype_skel = {
1803 PyObject_HEAD_INIT(0) 0, /* Header */
1804 "GAEEnc", /* @tp_name@ */
1805 sizeof(gaeadenc_pyobj), /* @tp_basicsize@ */
1806 0, /* @tp_itemsize@ */
1807
1808 gaeadenc_pydealloc, /* @tp_dealloc@ */
1809 0, /* @tp_print@ */
1810 0, /* @tp_getattr@ */
1811 0, /* @tp_setattr@ */
1812 0, /* @tp_compare@ */
1813 0, /* @tp_repr@ */
1814 0, /* @tp_as_number@ */
1815 0, /* @tp_as_sequence@ */
1816 0, /* @tp_as_mapping@ */
1817 0, /* @tp_hash@ */
1818 0, /* @tp_call@ */
1819 0, /* @tp_str@ */
1820 0, /* @tp_getattro@ */
1821 0, /* @tp_setattro@ */
1822 0, /* @tp_as_buffer@ */
1823 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1824 Py_TPFLAGS_BASETYPE,
1825
1826 /* @tp_doc@ */
1827 "Authenticated encryption operation.",
1828
1829 0, /* @tp_traverse@ */
1830 0, /* @tp_clear@ */
1831 0, /* @tp_richcompare@ */
1832 0, /* @tp_weaklistoffset@ */
1833 0, /* @tp_iter@ */
1834 0, /* @tp_iternext@ */
1835 PYMETHODS(gaeadenc), /* @tp_methods@ */
1836 0, /* @tp_members@ */
1837 PYGETSET(gaeadenc), /* @tp_getset@ */
1838 0, /* @tp_base@ */
1839 0, /* @tp_dict@ */
1840 0, /* @tp_descr_get@ */
1841 0, /* @tp_descr_set@ */
1842 0, /* @tp_dictoffset@ */
1843 0, /* @tp_init@ */
1844 PyType_GenericAlloc, /* @tp_alloc@ */
1845 abstract_pynew, /* @tp_new@ */
1846 0, /* @tp_free@ */
1847 0 /* @tp_is_gc@ */
1848 };
1849
1850 static PyTypeObject gcaeaddec_pytype_skel = {
1851 PyObject_HEAD_INIT(0) 0, /* Header */
1852 "GAEDecClass", /* @tp_name@ */
1853 sizeof(gcaeaddec_pyobj), /* @tp_basicsize@ */
1854 0, /* @tp_itemsize@ */
1855
1856 0, /* @tp_dealloc@ */
1857 0, /* @tp_print@ */
1858 0, /* @tp_getattr@ */
1859 0, /* @tp_setattr@ */
1860 0, /* @tp_compare@ */
1861 0, /* @tp_repr@ */
1862 0, /* @tp_as_number@ */
1863 0, /* @tp_as_sequence@ */
1864 0, /* @tp_as_mapping@ */
1865 0, /* @tp_hash@ */
1866 0, /* @tp_call@ */
1867 0, /* @tp_str@ */
1868 0, /* @tp_getattro@ */
1869 0, /* @tp_setattro@ */
1870 0, /* @tp_as_buffer@ */
1871 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1872 Py_TPFLAGS_BASETYPE,
1873
1874 /* @tp_doc@ */
1875 "Authenticated decryption operation metaclass.",
1876
1877 0, /* @tp_traverse@ */
1878 0, /* @tp_clear@ */
1879 0, /* @tp_richcompare@ */
1880 0, /* @tp_weaklistoffset@ */
1881 0, /* @tp_iter@ */
1882 0, /* @tp_iternext@ */
1883 0, /* @tp_methods@ */
1884 0, /* @tp_members@ */
1885 0, /* @tp_getset@ */
1886 0, /* @tp_base@ */
1887 0, /* @tp_dict@ */
1888 0, /* @tp_descr_get@ */
1889 0, /* @tp_descr_set@ */
1890 0, /* @tp_dictoffset@ */
1891 0, /* @tp_init@ */
1892 PyType_GenericAlloc, /* @tp_alloc@ */
1893 abstract_pynew, /* @tp_new@ */
1894 0, /* @tp_free@ */
1895 0 /* @tp_is_gc@ */
1896 };
1897
1898 static PyTypeObject gaeaddec_pytype_skel = {
1899 PyObject_HEAD_INIT(0) 0, /* Header */
1900 "GAEDec", /* @tp_name@ */
1901 sizeof(gaeaddec_pyobj), /* @tp_basicsize@ */
1902 0, /* @tp_itemsize@ */
1903
1904 gaeaddec_pydealloc, /* @tp_dealloc@ */
1905 0, /* @tp_print@ */
1906 0, /* @tp_getattr@ */
1907 0, /* @tp_setattr@ */
1908 0, /* @tp_compare@ */
1909 0, /* @tp_repr@ */
1910 0, /* @tp_as_number@ */
1911 0, /* @tp_as_sequence@ */
1912 0, /* @tp_as_mapping@ */
1913 0, /* @tp_hash@ */
1914 0, /* @tp_call@ */
1915 0, /* @tp_str@ */
1916 0, /* @tp_getattro@ */
1917 0, /* @tp_setattro@ */
1918 0, /* @tp_as_buffer@ */
1919 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1920 Py_TPFLAGS_BASETYPE,
1921
1922 /* @tp_doc@ */
1923 "Authenticated decryption operation.",
1924
1925 0, /* @tp_traverse@ */
1926 0, /* @tp_clear@ */
1927 0, /* @tp_richcompare@ */
1928 0, /* @tp_weaklistoffset@ */
1929 0, /* @tp_iter@ */
1930 0, /* @tp_iternext@ */
1931 PYMETHODS(gaeaddec), /* @tp_methods@ */
1932 0, /* @tp_members@ */
1933 PYGETSET(gaeaddec), /* @tp_getset@ */
1934 0, /* @tp_base@ */
1935 0, /* @tp_dict@ */
1936 0, /* @tp_descr_get@ */
1937 0, /* @tp_descr_set@ */
1938 0, /* @tp_dictoffset@ */
1939 0, /* @tp_init@ */
1940 PyType_GenericAlloc, /* @tp_alloc@ */
1941 abstract_pynew, /* @tp_new@ */
1942 0, /* @tp_free@ */
1943 0 /* @tp_is_gc@ */
1944 };
1945
1946 /*----- Hash functions ----------------------------------------------------*/
1947
1948 PyTypeObject *gchash_pytype;
1949 static PyTypeObject *ghash_pytype;
1950 PyObject *sha_pyobj, *has160_pyobj;
1951
1952 typedef struct ghash_pyobj {
1953 PyObject_HEAD
1954 ghash *h;
1955 } ghash_pyobj;
1956
1957 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1958 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1959
1960 CONVFUNC(gchash, gchash *, GCHASH_CH)
1961 CONVFUNC(ghash, ghash *, GHASH_H)
1962
1963 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1964 {
1965 static const char *const kwlist[] = { 0 };
1966 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1967 goto end;
1968 return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1969 end:
1970 return (0);
1971 }
1972
1973 static PyObject *gchash_pywrap(gchash *ch)
1974 {
1975 gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1976 g->ch = ch;
1977 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1978 g->ty.ht_type.tp_base = ghash_pytype;
1979 Py_INCREF(ghash_pytype);
1980 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1981 Py_TPFLAGS_BASETYPE |
1982 Py_TPFLAGS_HEAPTYPE);
1983 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1984 g->ty.ht_type.tp_free = 0;
1985 g->ty.ht_type.tp_new = ghash_pynew;
1986 typeready(&g->ty.ht_type);
1987 return ((PyObject *)g);
1988 }
1989
1990 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1991 {
1992 ghash_pyobj *g;
1993 if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1994 else Py_INCREF(cobj);
1995 g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1996 g->h = h;
1997 return ((PyObject *)g);
1998 }
1999
2000 static void ghash_pydealloc(PyObject *me)
2001 {
2002 GH_DESTROY(GHASH_H(me));
2003 Py_DECREF(me->ob_type);
2004 FREEOBJ(me);
2005 }
2006
2007 static PyObject *gchget_name(PyObject *me, void *hunoz)
2008 { return (PyString_FromString(GCHASH_CH(me)->name)); }
2009
2010 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
2011 { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2012
2013 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2014 { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2015
2016 static PyObject *ghmeth_copy(PyObject *me, PyObject *arg)
2017 {
2018 if (!PyArg_ParseTuple(arg, ":copy")) return (0);
2019 return (ghash_pywrap((PyObject *)me->ob_type, GH_COPY(GHASH_H(me))));
2020 }
2021
2022 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2023 {
2024 char *p;
2025 Py_ssize_t sz;
2026 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2027 GH_HASH(GHASH_H(me), p, sz);
2028 RETURN_ME;
2029 }
2030
2031 #define GHMETH_HASHU_(n, W, w) \
2032 static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg) \
2033 { \
2034 uint##n x; \
2035 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2036 GH_HASHU##W(GHASH_H(me), x); \
2037 RETURN_ME; \
2038 }
2039 DOUINTCONV(GHMETH_HASHU_)
2040
2041 #define GHMETH_HASHBUF_(n, W, w) \
2042 static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg) \
2043 { \
2044 char *p; \
2045 Py_ssize_t sz; \
2046 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2047 if (sz > MASK##n) TYERR("string too long"); \
2048 GH_HASHBUF##W(GHASH_H(me), p, sz); \
2049 RETURN_ME; \
2050 end: \
2051 return (0); \
2052 }
2053 DOUINTCONV(GHMETH_HASHBUF_)
2054
2055 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2056 {
2057 char *p;
2058 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2059 GH_HASHSTRZ(GHASH_H(me), p);
2060 RETURN_ME;
2061 }
2062
2063 static PyObject *ghmeth_done(PyObject *me, PyObject *arg)
2064 {
2065 ghash *g;
2066 PyObject *rc;
2067 if (!PyArg_ParseTuple(arg, ":done")) return (0);
2068 g = GH_COPY(GHASH_H(me));
2069 rc = bytestring_pywrap(0, g->ops->c->hashsz);
2070 GH_DONE(g, PyString_AS_STRING(rc));
2071 GH_DESTROY(g);
2072 return (rc);
2073 }
2074
2075 static const PyGetSetDef gchash_pygetset[] = {
2076 #define GETSETNAME(op, name) gch##op##_##name
2077 GET (bufsz, "CH.bufsz -> hash buffer size, or zero")
2078 GET (hashsz, "CH.hashsz -> hash output size")
2079 GET (name, "CH.name -> name of this kind of hash")
2080 #undef GETSETNAME
2081 { 0 }
2082 };
2083
2084 static const PyMethodDef ghash_pymethods[] = {
2085 #define METHNAME(name) ghmeth_##name
2086 METH (copy, "H.copy() -> HH")
2087 METH (hash, "H.hash(M)")
2088 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2089 DOUINTCONV(METHU_)
2090 #undef METHU_
2091 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2092 DOUINTCONV(METHBUF_)
2093 #undef METHBUF_
2094 METH (hashstrz, "H.hashstrz(STRING)")
2095 METH (done, "H.done() -> HASH")
2096 #undef METHNAME
2097 { 0 }
2098 };
2099
2100 static PyTypeObject gchash_pytype_skel = {
2101 PyObject_HEAD_INIT(0) 0, /* Header */
2102 "GCHash", /* @tp_name@ */
2103 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2104 0, /* @tp_itemsize@ */
2105
2106 0, /* @tp_dealloc@ */
2107 0, /* @tp_print@ */
2108 0, /* @tp_getattr@ */
2109 0, /* @tp_setattr@ */
2110 0, /* @tp_compare@ */
2111 0, /* @tp_repr@ */
2112 0, /* @tp_as_number@ */
2113 0, /* @tp_as_sequence@ */
2114 0, /* @tp_as_mapping@ */
2115 0, /* @tp_hash@ */
2116 0, /* @tp_call@ */
2117 0, /* @tp_str@ */
2118 0, /* @tp_getattro@ */
2119 0, /* @tp_setattro@ */
2120 0, /* @tp_as_buffer@ */
2121 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2122 Py_TPFLAGS_BASETYPE,
2123
2124 /* @tp_doc@ */
2125 "Hash function metaclass.",
2126
2127 0, /* @tp_traverse@ */
2128 0, /* @tp_clear@ */
2129 0, /* @tp_richcompare@ */
2130 0, /* @tp_weaklistoffset@ */
2131 0, /* @tp_iter@ */
2132 0, /* @tp_iternext@ */
2133 0, /* @tp_methods@ */
2134 0, /* @tp_members@ */
2135 PYGETSET(gchash), /* @tp_getset@ */
2136 0, /* @tp_base@ */
2137 0, /* @tp_dict@ */
2138 0, /* @tp_descr_get@ */
2139 0, /* @tp_descr_set@ */
2140 0, /* @tp_dictoffset@ */
2141 0, /* @tp_init@ */
2142 PyType_GenericAlloc, /* @tp_alloc@ */
2143 abstract_pynew, /* @tp_new@ */
2144 0, /* @tp_free@ */
2145 0 /* @tp_is_gc@ */
2146 };
2147
2148 static PyTypeObject ghash_pytype_skel = {
2149 PyObject_HEAD_INIT(0) 0, /* Header */
2150 "GHash", /* @tp_name@ */
2151 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2152 0, /* @tp_itemsize@ */
2153
2154 ghash_pydealloc, /* @tp_dealloc@ */
2155 0, /* @tp_print@ */
2156 0, /* @tp_getattr@ */
2157 0, /* @tp_setattr@ */
2158 0, /* @tp_compare@ */
2159 0, /* @tp_repr@ */
2160 0, /* @tp_as_number@ */
2161 0, /* @tp_as_sequence@ */
2162 0, /* @tp_as_mapping@ */
2163 0, /* @tp_hash@ */
2164 0, /* @tp_call@ */
2165 0, /* @tp_str@ */
2166 0, /* @tp_getattro@ */
2167 0, /* @tp_setattro@ */
2168 0, /* @tp_as_buffer@ */
2169 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2170 Py_TPFLAGS_BASETYPE,
2171
2172 /* @tp_doc@ */
2173 "Hash function, abstract base class.",
2174
2175 0, /* @tp_traverse@ */
2176 0, /* @tp_clear@ */
2177 0, /* @tp_richcompare@ */
2178 0, /* @tp_weaklistoffset@ */
2179 0, /* @tp_iter@ */
2180 0, /* @tp_iternext@ */
2181 PYMETHODS(ghash), /* @tp_methods@ */
2182 0, /* @tp_members@ */
2183 0, /* @tp_getset@ */
2184 0, /* @tp_base@ */
2185 0, /* @tp_dict@ */
2186 0, /* @tp_descr_get@ */
2187 0, /* @tp_descr_set@ */
2188 0, /* @tp_dictoffset@ */
2189 0, /* @tp_init@ */
2190 PyType_GenericAlloc, /* @tp_alloc@ */
2191 abstract_pynew, /* @tp_new@ */
2192 0, /* @tp_free@ */
2193 0 /* @tp_is_gc@ */
2194 };
2195
2196 /*----- Message authentication --------------------------------------------*/
2197
2198 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2199
2200 typedef struct gcmac_pyobj {
2201 PyHeapTypeObject ty;
2202 gcmac *cm;
2203 } gcmac_pyobj;
2204
2205 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2206 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2207 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2208 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2209 static PyObject *gmac_pywrap(PyObject *, gmac *);
2210
2211 typedef struct gmac_pyobj {
2212 PyHeapTypeObject ty;
2213 gmac *m;
2214 } gmac_pyobj;
2215
2216 extern PyTypeObject *gmac_pytype;
2217 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2218 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2219 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2220 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2221 extern int convgmac(PyObject *, void *);
2222
2223 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2224 {
2225 static const char *const kwlist[] = { "k", 0 };
2226 char *k;
2227 Py_ssize_t sz;
2228
2229 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2230 goto end;
2231 if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
2232 return (gmac_pywrap((PyObject *)ty,
2233 GM_KEY(GCMAC_CM(ty), k, sz)));
2234 end:
2235 return (0);
2236 }
2237
2238 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2239 {
2240 static const char *const kwlist[] = { 0 };
2241 ghash_pyobj *g;
2242
2243 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2244 g = PyObject_NEW(ghash_pyobj, ty);
2245 g->h = GM_INIT(GMAC_M(ty));
2246 Py_INCREF(ty);
2247 return ((PyObject *)g);
2248 }
2249
2250 static PyObject *gcmac_pywrap(gcmac *cm)
2251 {
2252 gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2253 g->cm = cm;
2254 g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2255 g->ty.ht_type.tp_base = gmac_pytype;
2256 Py_INCREF(gmac_pytype);
2257 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2258 Py_TPFLAGS_BASETYPE |
2259 Py_TPFLAGS_HEAPTYPE);
2260 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2261 g->ty.ht_type.tp_free = 0;
2262 g->ty.ht_type.tp_new = gmac_pynew;
2263 typeready(&g->ty.ht_type);
2264 return ((PyObject *)g);
2265 }
2266
2267 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2268 {
2269 gmac_pyobj *g;
2270 if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2271 else Py_INCREF(cobj);
2272 g = newtype((PyTypeObject *)cobj, 0, 0);
2273 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2274 g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
2275 g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
2276 g->ty.ht_type.tp_base = gmhash_pytype;
2277 Py_INCREF(gmac_pytype);
2278 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2279 Py_TPFLAGS_BASETYPE |
2280 Py_TPFLAGS_HEAPTYPE);
2281 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2282 g->ty.ht_type.tp_free = 0;
2283 g->ty.ht_type.tp_new = gmhash_pynew;
2284 typeready(&g->ty.ht_type);
2285 g->m = m;
2286 return ((PyObject *)g);
2287 }
2288
2289 static void gmac_pydealloc(PyObject *me)
2290 {
2291 GM_DESTROY(GMAC_M(me));
2292 Py_DECREF(me->ob_type);
2293 PyType_Type.tp_dealloc(me);
2294 }
2295
2296 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2297 { return (PyString_FromString(GCMAC_CM(me)->name)); }
2298
2299 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2300 { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2301
2302 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2303 { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2304
2305 static const PyGetSetDef gcmac_pygetset[] = {
2306 #define GETSETNAME(op, name) gcm##op##_##name
2307 GET (keysz, "CM.keysz -> acceptable key sizes")
2308 GET (tagsz, "CM.tagsz -> MAC output size")
2309 GET (name, "CM.name -> name of this kind of MAC")
2310 #undef GETSETNAME
2311 { 0 }
2312 };
2313
2314 static PyTypeObject gcmac_pytype_skel = {
2315 PyObject_HEAD_INIT(0) 0, /* Header */
2316 "GCMAC", /* @tp_name@ */
2317 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2318 0, /* @tp_itemsize@ */
2319
2320 0, /* @tp_dealloc@ */
2321 0, /* @tp_print@ */
2322 0, /* @tp_getattr@ */
2323 0, /* @tp_setattr@ */
2324 0, /* @tp_compare@ */
2325 0, /* @tp_repr@ */
2326 0, /* @tp_as_number@ */
2327 0, /* @tp_as_sequence@ */
2328 0, /* @tp_as_mapping@ */
2329 0, /* @tp_hash@ */
2330 0, /* @tp_call@ */
2331 0, /* @tp_str@ */
2332 0, /* @tp_getattro@ */
2333 0, /* @tp_setattro@ */
2334 0, /* @tp_as_buffer@ */
2335 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2336 Py_TPFLAGS_BASETYPE,
2337
2338 /* @tp_doc@ */
2339 "Message authentication code metametaclass.",
2340
2341 0, /* @tp_traverse@ */
2342 0, /* @tp_clear@ */
2343 0, /* @tp_richcompare@ */
2344 0, /* @tp_weaklistoffset@ */
2345 0, /* @tp_iter@ */
2346 0, /* @tp_iternext@ */
2347 0, /* @tp_methods@ */
2348 0, /* @tp_members@ */
2349 PYGETSET(gcmac), /* @tp_getset@ */
2350 0, /* @tp_base@ */
2351 0, /* @tp_dict@ */
2352 0, /* @tp_descr_get@ */
2353 0, /* @tp_descr_set@ */
2354 0, /* @tp_dictoffset@ */
2355 0, /* @tp_init@ */
2356 PyType_GenericAlloc, /* @tp_alloc@ */
2357 abstract_pynew, /* @tp_new@ */
2358 0, /* @tp_free@ */
2359 0 /* @tp_is_gc@ */
2360 };
2361
2362 static PyTypeObject gmac_pytype_skel = {
2363 PyObject_HEAD_INIT(0) 0, /* Header */
2364 "GMAC", /* @tp_name@ */
2365 sizeof(gmac_pyobj), /* @tp_basicsize@ */
2366 0, /* @tp_itemsize@ */
2367
2368 gmac_pydealloc, /* @tp_dealloc@ */
2369 0, /* @tp_print@ */
2370 0, /* @tp_getattr@ */
2371 0, /* @tp_setattr@ */
2372 0, /* @tp_compare@ */
2373 0, /* @tp_repr@ */
2374 0, /* @tp_as_number@ */
2375 0, /* @tp_as_sequence@ */
2376 0, /* @tp_as_mapping@ */
2377 0, /* @tp_hash@ */
2378 0, /* @tp_call@ */
2379 0, /* @tp_str@ */
2380 0, /* @tp_getattro@ */
2381 0, /* @tp_setattro@ */
2382 0, /* @tp_as_buffer@ */
2383 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2384 Py_TPFLAGS_BASETYPE,
2385
2386 /* @tp_doc@ */
2387 "Message authentication code metaclass, abstract base class.",
2388
2389 0, /* @tp_traverse@ */
2390 0, /* @tp_clear@ */
2391 0, /* @tp_richcompare@ */
2392 0, /* @tp_weaklistoffset@ */
2393 0, /* @tp_iter@ */
2394 0, /* @tp_iternext@ */
2395 0, /* @tp_methods@ */
2396 0, /* @tp_members@ */
2397 0, /* @tp_getset@ */
2398 0, /* @tp_base@ */
2399 0, /* @tp_dict@ */
2400 0, /* @tp_descr_get@ */
2401 0, /* @tp_descr_set@ */
2402 0, /* @tp_dictoffset@ */
2403 0, /* @tp_init@ */
2404 PyType_GenericAlloc, /* @tp_alloc@ */
2405 abstract_pynew, /* @tp_new@ */
2406 0, /* @tp_free@ */
2407 0 /* @tp_is_gc@ */
2408 };
2409
2410 static PyTypeObject gmhash_pytype_skel = {
2411 PyObject_HEAD_INIT(0) 0, /* Header */
2412 "GMACHash", /* @tp_name@ */
2413 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2414 0, /* @tp_itemsize@ */
2415
2416 ghash_pydealloc, /* @tp_dealloc@ */
2417 0, /* @tp_print@ */
2418 0, /* @tp_getattr@ */
2419 0, /* @tp_setattr@ */
2420 0, /* @tp_compare@ */
2421 0, /* @tp_repr@ */
2422 0, /* @tp_as_number@ */
2423 0, /* @tp_as_sequence@ */
2424 0, /* @tp_as_mapping@ */
2425 0, /* @tp_hash@ */
2426 0, /* @tp_call@ */
2427 0, /* @tp_str@ */
2428 0, /* @tp_getattro@ */
2429 0, /* @tp_setattro@ */
2430 0, /* @tp_as_buffer@ */
2431 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2432 Py_TPFLAGS_BASETYPE,
2433
2434 /* @tp_doc@ */
2435 "Message authentication code, abstract base class.",
2436
2437 0, /* @tp_traverse@ */
2438 0, /* @tp_clear@ */
2439 0, /* @tp_richcompare@ */
2440 0, /* @tp_weaklistoffset@ */
2441 0, /* @tp_iter@ */
2442 0, /* @tp_iternext@ */
2443 0, /* @tp_methods@ */
2444 0, /* @tp_members@ */
2445 0, /* @tp_getset@ */
2446 0, /* @tp_base@ */
2447 0, /* @tp_dict@ */
2448 0, /* @tp_descr_get@ */
2449 0, /* @tp_descr_set@ */
2450 0, /* @tp_dictoffset@ */
2451 0, /* @tp_init@ */
2452 PyType_GenericAlloc, /* @tp_alloc@ */
2453 abstract_pynew, /* @tp_new@ */
2454 0, /* @tp_free@ */
2455 0 /* @tp_is_gc@ */
2456 };
2457
2458 /*----- Special snowflake for Poly1305 ------------------------------------*/
2459
2460 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2461
2462 typedef struct poly1305key_pyobj {
2463 PyHeapTypeObject ty;
2464 poly1305_key k;
2465 } poly1305key_pyobj;
2466
2467 typedef struct poly1305hash_pyobj {
2468 PyObject_HEAD
2469 unsigned f;
2470 #define f_mask 1u
2471 poly1305_ctx ctx;
2472 } poly1305hash_pyobj;
2473
2474 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2475 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2476 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2477
2478 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2479 PyObject *arg, PyObject *kw)
2480 {
2481 static const char *const kwlist[] = { "mask", 0 };
2482 poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2483 poly1305hash_pyobj *ph;
2484 char *m = 0;
2485 Py_ssize_t sz;
2486
2487 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#:new", KWLIST, &m, &sz))
2488 return (0);
2489 if (m && sz != POLY1305_MASKSZ) VALERR("bad mask length");
2490 ph = PyObject_NEW(poly1305hash_pyobj, ty);
2491 ph->f = 0;
2492 if (m) ph->f |= f_mask;
2493 poly1305_macinit(&ph->ctx, &pk->k, m);
2494 Py_INCREF(ty);
2495 return ((PyObject *)ph);
2496 end:
2497 return (0);
2498 }
2499
2500 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2501 PyObject *arg, PyObject *kw)
2502 {
2503 static const char *const kwlist[] = { "k", 0 };
2504 poly1305key_pyobj *pk;
2505 char *k;
2506 Py_ssize_t sz;
2507
2508 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2509 goto end;
2510 if (keysz(sz, poly1305_keysz) != sz) VALERR("bad key length");
2511
2512 pk = newtype(ty, 0, 0);
2513 pk->ty.ht_name = PyString_FromString("poly1305(keyed)");
2514 pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2515 pk->ty.ht_type.tp_name = PyString_AS_STRING(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, sz);
2527 return ((PyObject *)pk);
2528
2529 end:
2530 return (0);
2531 }
2532
2533 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2534 { return (PyString_FromString("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, PyObject *arg)
2546 {
2547 poly1305hash_pyobj *ph;
2548 if (!PyArg_ParseTuple(arg, ":copy")) return (0);
2549 ph = PyObject_NEW(poly1305hash_pyobj, me->ob_type);
2550 poly1305_copy(&ph->ctx, P1305_CTX(me));
2551 Py_INCREF(me->ob_type);
2552 return ((PyObject *)ph);
2553 }
2554
2555 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2556 {
2557 char *p;
2558 Py_ssize_t sz;
2559 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2560 poly1305_hash(P1305_CTX(me), p, sz);
2561 RETURN_ME;
2562 }
2563
2564 #define POLYMETH_HASHU_(n, W, w) \
2565 static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg) \
2566 { \
2567 uint##n x; \
2568 octet b[SZ_##W]; \
2569 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2570 STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2571 RETURN_ME; \
2572 }
2573 DOUINTCONV(POLYMETH_HASHU_)
2574
2575 #define POLYMETH_HASHBUF_(n, W, w) \
2576 static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg) \
2577 { \
2578 char *p; \
2579 Py_ssize_t sz; \
2580 octet b[SZ_##W]; \
2581 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2582 if (sz > MASK##n) TYERR("string too long"); \
2583 STORE##W(b, sz); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2584 poly1305_hash(P1305_CTX(me), p, sz); \
2585 RETURN_ME; \
2586 end: \
2587 return (0); \
2588 }
2589 DOUINTCONV(POLYMETH_HASHBUF_)
2590
2591 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2592 {
2593 char *p;
2594 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2595 poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2596 RETURN_ME;
2597 }
2598
2599 static PyObject *polymeth_flush(PyObject *me, PyObject *arg)
2600 {
2601 if (!PyArg_ParseTuple(arg, ":flush")) return (0);
2602 poly1305_flush(P1305_CTX(me));
2603 RETURN_ME;
2604 }
2605
2606 static PyObject *polymeth_flushzero(PyObject *me, PyObject *arg)
2607 {
2608 if (!PyArg_ParseTuple(arg, ":flushzero")) return (0);
2609 poly1305_flushzero(P1305_CTX(me));
2610 RETURN_ME;
2611 }
2612
2613 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2614 {
2615 PyObject *pre, *suff;
2616 if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2617 if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2618 !PyObject_TypeCheck(suff, poly1305hash_pytype))
2619 TYERR("wanted a poly1305hash");
2620 if (me->ob_type != pre->ob_type || me->ob_type != suff->ob_type)
2621 TYERR("key mismatch");
2622 if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2623 poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2624 RETURN_ME;
2625 end:
2626 return (0);
2627 }
2628
2629 static PyObject *polymeth_done(PyObject *me, PyObject *arg)
2630 {
2631 PyObject *rc;
2632 if (!PyArg_ParseTuple(arg, ":done")) return (0);
2633 if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2634 rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2635 poly1305_done(P1305_CTX(me), PyString_AS_STRING(rc));
2636 return (rc);
2637 end:
2638 return (0);
2639 }
2640
2641 static const PyGetSetDef poly1305cls_pygetset[] = {
2642 #define GETSETNAME(op, name) poly1305cls##op##_##name
2643 GET (keysz, "PC.keysz -> acceptable key sizes")
2644 GET (masksz, "PC.masksz -> mask size")
2645 GET (tagsz, "PC.tagsz -> MAC output size")
2646 GET (name, "PC.name -> name of this kind of MAC")
2647 #undef GETSETNAME
2648 { 0 }
2649 };
2650
2651 static const PyMethodDef poly1305hash_pymethods[] = {
2652 #define METHNAME(name) polymeth_##name
2653 METH (copy, "P.copy() -> PP")
2654 METH (hash, "P.hash(M)")
2655 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2656 DOUINTCONV(METHU_)
2657 #undef METHU_
2658 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2659 DOUINTCONV(METHBUF_)
2660 #undef METHBUF_
2661 METH (hashstrz, "P.hashstrz(STRING)")
2662 METH (flush, "P.flush()")
2663 METH (flushzero, "P.flushzero()")
2664 METH (concat, "P.concat(PREFIX, SUFFIX)")
2665 METH (done, "P.done() -> TAG")
2666 #undef METHNAME
2667 { 0 }
2668 };
2669
2670 static PyTypeObject poly1305cls_pytype_skel = {
2671 PyObject_HEAD_INIT(0) 0, /* Header */
2672 "Poly1305Class", /* @tp_name@ */
2673 sizeof(PyHeapTypeObject), /* @tp_basicsize@ */
2674 0, /* @tp_itemsize@ */
2675
2676 0, /* @tp_dealloc@ */
2677 0, /* @tp_print@ */
2678 0, /* @tp_getattr@ */
2679 0, /* @tp_setattr@ */
2680 0, /* @tp_compare@ */
2681 0, /* @tp_repr@ */
2682 0, /* @tp_as_number@ */
2683 0, /* @tp_as_sequence@ */
2684 0, /* @tp_as_mapping@ */
2685 0, /* @tp_hash@ */
2686 0, /* @tp_call@ */
2687 0, /* @tp_str@ */
2688 0, /* @tp_getattro@ */
2689 0, /* @tp_setattro@ */
2690 0, /* @tp_as_buffer@ */
2691 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2692 Py_TPFLAGS_BASETYPE,
2693
2694 /* @tp_doc@ */
2695 "Poly1305 metametaclass. Best not to ask.",
2696
2697 0, /* @tp_traverse@ */
2698 0, /* @tp_clear@ */
2699 0, /* @tp_richcompare@ */
2700 0, /* @tp_weaklistoffset@ */
2701 0, /* @tp_iter@ */
2702 0, /* @tp_iternext@ */
2703 0, /* @tp_methods@ */
2704 0, /* @tp_members@ */
2705 PYGETSET(poly1305cls), /* @tp_getset@ */
2706 0, /* @tp_base@ */
2707 0, /* @tp_dict@ */
2708 0, /* @tp_descr_get@ */
2709 0, /* @tp_descr_set@ */
2710 0, /* @tp_dictoffset@ */
2711 0, /* @tp_init@ */
2712 PyType_GenericAlloc, /* @tp_alloc@ */
2713 abstract_pynew, /* @tp_new@ */
2714 0, /* @tp_free@ */
2715 0 /* @tp_is_gc@ */
2716 };
2717
2718 static PyTypeObject poly1305key_pytype_skel = {
2719 PyObject_HEAD_INIT(0) 0, /* Header */
2720 "poly1305", /* @tp_name@ */
2721 sizeof(poly1305key_pyobj), /* @tp_basicsize@ */
2722 0, /* @tp_itemsize@ */
2723
2724 0, /* @tp_dealloc@ */
2725 0, /* @tp_print@ */
2726 0, /* @tp_getattr@ */
2727 0, /* @tp_setattr@ */
2728 0, /* @tp_compare@ */
2729 0, /* @tp_repr@ */
2730 0, /* @tp_as_number@ */
2731 0, /* @tp_as_sequence@ */
2732 0, /* @tp_as_mapping@ */
2733 0, /* @tp_hash@ */
2734 0, /* @tp_call@ */
2735 0, /* @tp_str@ */
2736 0, /* @tp_getattro@ */
2737 0, /* @tp_setattro@ */
2738 0, /* @tp_as_buffer@ */
2739 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2740 Py_TPFLAGS_BASETYPE,
2741
2742 /* @tp_doc@ */
2743 "poly1305(K): Poly1305 key.",
2744
2745 0, /* @tp_traverse@ */
2746 0, /* @tp_clear@ */
2747 0, /* @tp_richcompare@ */
2748 0, /* @tp_weaklistoffset@ */
2749 0, /* @tp_iter@ */
2750 0, /* @tp_iternext@ */
2751 0, /* @tp_methods@ */
2752 0, /* @tp_members@ */
2753 0, /* @tp_getset@ */
2754 0, /* @tp_base@ */
2755 0, /* @tp_dict@ */
2756 0, /* @tp_descr_get@ */
2757 0, /* @tp_descr_set@ */
2758 0, /* @tp_dictoffset@ */
2759 0, /* @tp_init@ */
2760 PyType_GenericAlloc, /* @tp_alloc@ */
2761 poly1305key_pynew, /* @tp_new@ */
2762 0, /* @tp_free@ */
2763 0 /* @tp_is_gc@ */
2764 };
2765
2766 static PyTypeObject poly1305hash_pytype_skel = {
2767 PyObject_HEAD_INIT(0) 0, /* Header */
2768 "Poly1305Hash", /* @tp_name@ */
2769 sizeof(poly1305hash_pyobj), /* @tp_basicsize@ */
2770 0, /* @tp_itemsize@ */
2771
2772 0, /* @tp_dealloc@ */
2773 0, /* @tp_print@ */
2774 0, /* @tp_getattr@ */
2775 0, /* @tp_setattr@ */
2776 0, /* @tp_compare@ */
2777 0, /* @tp_repr@ */
2778 0, /* @tp_as_number@ */
2779 0, /* @tp_as_sequence@ */
2780 0, /* @tp_as_mapping@ */
2781 0, /* @tp_hash@ */
2782 0, /* @tp_call@ */
2783 0, /* @tp_str@ */
2784 0, /* @tp_getattro@ */
2785 0, /* @tp_setattro@ */
2786 0, /* @tp_as_buffer@ */
2787 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2788 Py_TPFLAGS_BASETYPE,
2789
2790 /* @tp_doc@ */
2791 "Poly1305 MAC context base class.",
2792
2793 0, /* @tp_traverse@ */
2794 0, /* @tp_clear@ */
2795 0, /* @tp_richcompare@ */
2796 0, /* @tp_weaklistoffset@ */
2797 0, /* @tp_iter@ */
2798 0, /* @tp_iternext@ */
2799 PYMETHODS(poly1305hash), /* @tp_methods@ */
2800 0, /* @tp_members@ */
2801 0, /* @tp_getset@ */
2802 0, /* @tp_base@ */
2803 0, /* @tp_dict@ */
2804 0, /* @tp_descr_get@ */
2805 0, /* @tp_descr_set@ */
2806 0, /* @tp_dictoffset@ */
2807 0, /* @tp_init@ */
2808 PyType_GenericAlloc, /* @tp_alloc@ */
2809 abstract_pynew, /* @tp_new@ */
2810 0, /* @tp_free@ */
2811 0 /* @tp_is_gc@ */
2812 };
2813
2814 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2815
2816 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance) \
2817 static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg) \
2818 { \
2819 dance##_ctx dance; \
2820 char *k, *n; \
2821 Py_ssize_t ksz, nsz; \
2822 PyObject *rc; \
2823 if (!PyArg_ParseTuple(arg, "s#s#:" #hdance "_prf", \
2824 &k, &ksz, &n, &nsz)) \
2825 goto end; \
2826 if (ksz != keysz(ksz, dance##_keysz)) VALERR("bad key length"); \
2827 if (nsz != HDANCE##_INSZ) VALERR("bad input length"); \
2828 rc = bytestring_pywrap(0, HSALSA20_OUTSZ); \
2829 dance##_init(&dance, k, ksz, 0); \
2830 hdance##_prf(&dance, n, PyString_AS_STRING(rc)); \
2831 return (rc); \
2832 end: \
2833 return (0); \
2834 }
2835
2836 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2837 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2838 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2839
2840 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2841 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2842 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2843
2844 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2845
2846 static PyTypeObject *kxvik_pytype;
2847
2848 typedef struct kxvik_pyobj {
2849 PyObject_HEAD
2850 keccak1600_state s;
2851 unsigned n;
2852 } kxvik_pyobj;
2853
2854 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2855 {
2856 unsigned n = 24;
2857 kxvik_pyobj *rc = 0;
2858 static const char *const kwlist[] = { "nround", 0 };
2859 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2860 convuint, &n))
2861 goto end;
2862 rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2863 rc->n = n;
2864 keccak1600_init(&rc->s);
2865 end:
2866 return ((PyObject *)rc);
2867 }
2868
2869 static PyObject *kxvikmeth_copy(PyObject *me, PyObject *arg)
2870 {
2871 kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2872 if (!PyArg_ParseTuple(arg, ":copy")) goto end;
2873 rc = (kxvik_pyobj *)k->ob_type->tp_alloc(k->ob_type, 0);
2874 rc->s = k->s; rc->n = k->n;
2875 end:
2876 return ((PyObject *)rc);
2877 }
2878
2879 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2880 {
2881 kxvik_pyobj *k = (kxvik_pyobj *)me;
2882 kludge64 t[25];
2883 const octet *q;
2884 octet buf[8];
2885 unsigned i;
2886 char *p; Py_ssize_t n;
2887
2888 if (!PyArg_ParseTuple(arg, "s#:mix", &p, &n)) goto end;
2889 if (n > 200) VALERR("out of range");
2890 q = (const octet *)p;
2891 i = 0;
2892 while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2893 if (n) {
2894 memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2895 LOAD64_L_(t[i], buf); i++;
2896 }
2897 keccak1600_mix(&k->s, t, i);
2898 RETURN_ME;
2899 end:
2900 return (0);
2901 }
2902
2903 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2904 {
2905 kxvik_pyobj *k = (kxvik_pyobj *)me;
2906 PyObject *rc = 0;
2907 kludge64 t[25];
2908 octet *q, buf[8];
2909 unsigned i;
2910 unsigned n;
2911
2912 if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2913 if (n > 200) VALERR("out of range");
2914 rc = bytestring_pywrap(0, n);
2915 q = (octet *)PyString_AS_STRING(rc);
2916 keccak1600_extract(&k->s, t, (n + 7)/8);
2917 i = 0;
2918 while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2919 if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2920 end:
2921 return (rc);
2922 }
2923
2924 static PyObject *kxvikmeth_step(PyObject *me, PyObject *arg)
2925 {
2926 kxvik_pyobj *k = (kxvik_pyobj *)me;
2927 if (!PyArg_ParseTuple(arg, ":step")) return (0);
2928 keccak1600_p(&k->s, &k->s, k->n);
2929 RETURN_ME;
2930 }
2931
2932 static PyObject *kxvikget_nround(PyObject *me, void *hunoz)
2933 {
2934 kxvik_pyobj *k = (kxvik_pyobj *)me;
2935 return (PyInt_FromLong(k->n));
2936 }
2937
2938 static int kxvikset_nround(PyObject *me, PyObject *val, void *hunoz)
2939 {
2940 kxvik_pyobj *k = (kxvik_pyobj *)me;
2941 unsigned n;
2942 int rc = -1;
2943
2944 if (!val) NIERR("__del__");
2945 if (!convuint(val, &n)) goto end;
2946 k->n = n;
2947 rc = 0;
2948 end:
2949 return (rc);
2950 }
2951
2952 static const PyGetSetDef kxvik_pygetset[] = {
2953 #define GETSETNAME(op, name) kxvik##op##_##name
2954 GETSET(nround, "KECCAK.nround -> number of rounds")
2955 #undef GETSETNAME
2956 { 0 }
2957 };
2958
2959 static const PyMethodDef kxvik_pymethods[] = {
2960 #define METHNAME(func) kxvikmeth_##func
2961 METH (copy, "KECCAK.copy() -> KECCAK'")
2962 METH (mix, "KECCAK.mix(DATA)")
2963 METH (extract, "KECCAK.extract(NOCTETS)")
2964 METH (step, "KECCAK.step()")
2965 #undef METHNAME
2966 { 0 }
2967 };
2968
2969 static PyTypeObject kxvik_pytype_skel = {
2970 PyObject_HEAD_INIT(0) 0, /* Header */
2971 "Keccak1600", /* @tp_name@ */
2972 sizeof(kxvik_pyobj), /* @tp_basicsize@ */
2973 0, /* @tp_itemsize@ */
2974
2975 0, /* @tp_dealloc@ */
2976 0, /* @tp_print@ */
2977 0, /* @tp_getattr@ */
2978 0, /* @tp_setattr@ */
2979 0, /* @tp_compare@ */
2980 0, /* @tp_repr@ */
2981 0, /* @tp_as_number@ */
2982 0, /* @tp_as_sequence@ */
2983 0, /* @tp_as_mapping@ */
2984 0, /* @tp_hash@ */
2985 0, /* @tp_call@ */
2986 0, /* @tp_str@ */
2987 0, /* @tp_getattro@ */
2988 0, /* @tp_setattro@ */
2989 0, /* @tp_as_buffer@ */
2990 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2991 Py_TPFLAGS_BASETYPE,
2992
2993 /* @tp_doc@ */
2994 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2995
2996 0, /* @tp_traverse@ */
2997 0, /* @tp_clear@ */
2998 0, /* @tp_richcompare@ */
2999 0, /* @tp_weaklistoffset@ */
3000 0, /* @tp_iter@ */
3001 0, /* @tp_iternext@ */
3002 PYMETHODS(kxvik), /* @tp_methods@ */
3003 0, /* @tp_members@ */
3004 PYGETSET(kxvik), /* @tp_getset@ */
3005 0, /* @tp_base@ */
3006 0, /* @tp_dict@ */
3007 0, /* @tp_descr_get@ */
3008 0, /* @tp_descr_set@ */
3009 0, /* @tp_dictoffset@ */
3010 0, /* @tp_init@ */
3011 PyType_GenericAlloc, /* @tp_alloc@ */
3012 kxvik_pynew, /* @tp_new@ */
3013 0, /* @tp_free@ */
3014 0 /* @tp_is_gc@ */
3015 };
3016
3017 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
3018
3019 typedef struct shake_pyobj {
3020 PyObject_HEAD
3021 int st;
3022 shake_ctx h;
3023 } shake_pyobj;
3024
3025 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
3026 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
3027
3028 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
3029 const void *, size_t,
3030 const void *, size_t),
3031 PyTypeObject *ty,
3032 PyObject *arg, PyObject *kw)
3033 {
3034 shake_pyobj *rc = 0;
3035 char *p = 0, *f = 0;
3036 Py_ssize_t psz = 0, fsz = 0;
3037 static const char *const kwlist[] = { "perso", "func", 0 };
3038
3039 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#s#:new", KWLIST,
3040 &p, &psz, &f, &fsz))
3041 goto end;
3042 rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3043 initfn(&rc->h, f, fsz, p, psz);
3044 rc->st = 0;
3045 end:
3046 return ((PyObject *)rc);
3047 }
3048
3049 static PyObject *shake128_pynew(PyTypeObject *ty,
3050 PyObject *arg, PyObject *kw)
3051 { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
3052
3053 static PyObject *shake256_pynew(PyTypeObject *ty,
3054 PyObject *arg, PyObject *kw)
3055 { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
3056
3057 static int shake_check(PyObject *me, int st)
3058 {
3059 if (SHAKE_ST(me) != st) VALERR("wrong state");
3060 return (0);
3061 end:
3062 return (-1);
3063 }
3064
3065 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3066 {
3067 char *p;
3068 Py_ssize_t sz;
3069 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
3070 if (shake_check(me, 0)) return (0);
3071 shake_hash(SHAKE_H(me), p, sz);
3072 RETURN_ME;
3073 }
3074
3075 #define SHAKEMETH_HASHU_(n, W, w) \
3076 static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg) \
3077 { \
3078 uint##n x; \
3079 octet b[SZ_##W]; \
3080 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3081 if (shake_check(me, 0)) return (0); \
3082 STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3083 RETURN_ME; \
3084 }
3085 DOUINTCONV(SHAKEMETH_HASHU_)
3086
3087 #define SHAKEMETH_HASHBUF_(n, W, w) \
3088 static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg) \
3089 { \
3090 char *p; \
3091 Py_ssize_t sz; \
3092 octet b[SZ_##W]; \
3093 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
3094 if (sz > MASK##n) TYERR("string too long"); \
3095 if (shake_check(me, 0)) goto end; \
3096 STORE##W(b, sz); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3097 shake_hash(SHAKE_H(me), p, sz); \
3098 RETURN_ME; \
3099 end: \
3100 return (0); \
3101 }
3102 DOUINTCONV(SHAKEMETH_HASHBUF_)
3103
3104 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3105 {
3106 char *p;
3107 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3108 if (shake_check(me, 0)) return (0);
3109 shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3110 RETURN_ME;
3111 }
3112
3113 static PyObject *shakemeth_xof(PyObject *me, PyObject *arg)
3114 {
3115 if (!PyArg_ParseTuple(arg, ":xof")) goto end;
3116 if (shake_check(me, 0)) goto end;
3117 shake_xof(SHAKE_H(me));
3118 SHAKE_ST(me) = 1;
3119 RETURN_ME;
3120 end:
3121 return (0);
3122 }
3123
3124 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
3125 {
3126 PyObject *rc = 0;
3127 size_t n;
3128 if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
3129 if (shake_check(me, 0)) goto end;
3130 rc = bytestring_pywrap(0, n);
3131 shake_done(SHAKE_H(me), PyString_AS_STRING(rc), n);
3132 SHAKE_ST(me) = -1;
3133 end:
3134 return (rc);
3135 }
3136
3137 static PyObject *shakemeth_copy(PyObject *me, PyObject *arg)
3138 {
3139 shake_pyobj *rc = 0;
3140
3141 if (!PyArg_ParseTuple(arg, ":copy")) goto end;
3142 rc = PyObject_NEW(shake_pyobj, me->ob_type);
3143 rc->h = *SHAKE_H(me);
3144 rc->st = SHAKE_ST(me);
3145 end:
3146 return ((PyObject *)rc);
3147 }
3148
3149 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3150 {
3151 PyObject *rc = 0;
3152 size_t sz;
3153
3154 if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3155 if (shake_check(me, 1)) goto end;
3156 rc = bytestring_pywrap(0, sz);
3157 shake_get(SHAKE_H(me), PyString_AS_STRING(rc), sz);
3158 end:
3159 return (rc);
3160 }
3161
3162 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3163 {
3164 PyObject *rc = 0;
3165 char *p; Py_ssize_t sz;
3166
3167 if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) goto end;
3168 if (shake_check(me, 1)) goto end;
3169 rc = bytestring_pywrap(0, sz);
3170 shake_mask(SHAKE_H(me), p, PyString_AS_STRING(rc), sz);
3171 end:
3172 return (rc);
3173 }
3174
3175 static PyObject *shakeget_rate(PyObject *me, void *hunoz)
3176 { return (PyInt_FromLong(SHAKE_H(me)->h.r)); }
3177
3178 static PyObject *shakeget_buffered(PyObject *me, void *hunoz)
3179 { return (PyInt_FromLong(SHAKE_H(me)->h.n)); }
3180
3181 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3182 {
3183 int st = SHAKE_ST(me);
3184 return (PyString_FromString(st == 0 ? "absorb" :
3185 st == 1 ? "squeeze" : "dead"));
3186 }
3187
3188 static const PyGetSetDef shake_pygetset[] = {
3189 #define GETSETNAME(op, name) shake##op##_##name
3190 GET (rate, "S.rate -> rate, in bytes")
3191 GET (buffered, "S.buffered -> amount currently buffered")
3192 GET (state, "S.state -> `absorb', `squeeze', `dead'")
3193 #undef GETSETNAME
3194 { 0 }
3195 };
3196
3197 static const PyMethodDef shake_pymethods[] = {
3198 #define METHNAME(func) shakemeth_##func
3199 METH (copy, "S.copy() -> SS")
3200 METH (hash, "S.hash(M)")
3201 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3202 DOUINTCONV(METHU_)
3203 #undef METHU_
3204 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3205 DOUINTCONV(METHBUF_)
3206 #undef METHBUF_
3207 METH (hashstrz, "S.hashstrz(STRING)")
3208 METH (xof, "S.xof()")
3209 METH (done, "S.done(LEN) -> H")
3210 METH (get, "S.get(LEN) -> H")
3211 METH (mask, "S.mask(M) -> C")
3212 #undef METHNAME
3213 { 0 }
3214 };
3215
3216 static PyTypeObject shake_pytype_skel = {
3217 PyObject_HEAD_INIT(0) 0, /* Header */
3218 "Shake", /* @tp_name@ */
3219 sizeof(shake_pyobj), /* @tp_basicsize@ */
3220 0, /* @tp_itemsize@ */
3221
3222 0, /* @tp_dealloc@ */
3223 0, /* @tp_print@ */
3224 0, /* @tp_getattr@ */
3225 0, /* @tp_setattr@ */
3226 0, /* @tp_compare@ */
3227 0, /* @tp_repr@ */
3228 0, /* @tp_as_number@ */
3229 0, /* @tp_as_sequence@ */
3230 0, /* @tp_as_mapping@ */
3231 0, /* @tp_hash@ */
3232 0, /* @tp_call@ */
3233 0, /* @tp_str@ */
3234 0, /* @tp_getattro@ */
3235 0, /* @tp_setattro@ */
3236 0, /* @tp_as_buffer@ */
3237 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3238 Py_TPFLAGS_BASETYPE,
3239
3240 /* @tp_doc@ */
3241 "SHAKE/cSHAKE/KMAC base class.",
3242
3243 0, /* @tp_traverse@ */
3244 0, /* @tp_clear@ */
3245 0, /* @tp_richcompare@ */
3246 0, /* @tp_weaklistoffset@ */
3247 0, /* @tp_iter@ */
3248 0, /* @tp_iternext@ */
3249 PYMETHODS(shake), /* @tp_methods@ */
3250 0, /* @tp_members@ */
3251 PYGETSET(shake), /* @tp_getset@ */
3252 0, /* @tp_base@ */
3253 0, /* @tp_dict@ */
3254 0, /* @tp_descr_get@ */
3255 0, /* @tp_descr_set@ */
3256 0, /* @tp_dictoffset@ */
3257 0, /* @tp_init@ */
3258 PyType_GenericAlloc, /* @tp_alloc@ */
3259 abstract_pynew, /* @tp_new@ */
3260 0, /* @tp_free@ */
3261 0 /* @tp_is_gc@ */
3262 };
3263
3264 static PyTypeObject shake128_pytype_skel = {
3265 PyObject_HEAD_INIT(0) 0, /* Header */
3266 "Shake128", /* @tp_name@ */
3267 0, /* @tp_basicsize@ */
3268 0, /* @tp_itemsize@ */
3269
3270 0, /* @tp_dealloc@ */
3271 0, /* @tp_print@ */
3272 0, /* @tp_getattr@ */
3273 0, /* @tp_setattr@ */
3274 0, /* @tp_compare@ */
3275 0, /* @tp_repr@ */
3276 0, /* @tp_as_number@ */
3277 0, /* @tp_as_sequence@ */
3278 0, /* @tp_as_mapping@ */
3279 0, /* @tp_hash@ */
3280 0, /* @tp_call@ */
3281 0, /* @tp_str@ */
3282 0, /* @tp_getattro@ */
3283 0, /* @tp_setattro@ */
3284 0, /* @tp_as_buffer@ */
3285 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3286 Py_TPFLAGS_BASETYPE,
3287
3288 /* @tp_doc@ */
3289 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3290
3291 0, /* @tp_traverse@ */
3292 0, /* @tp_clear@ */
3293 0, /* @tp_richcompare@ */
3294 0, /* @tp_weaklistoffset@ */
3295 0, /* @tp_iter@ */
3296 0, /* @tp_iternext@ */
3297 0, /* @tp_methods@ */
3298 0, /* @tp_members@ */
3299 0, /* @tp_getset@ */
3300 0, /* @tp_base@ */
3301 0, /* @tp_dict@ */
3302 0, /* @tp_descr_get@ */
3303 0, /* @tp_descr_set@ */
3304 0, /* @tp_dictoffset@ */
3305 0, /* @tp_init@ */
3306 PyType_GenericAlloc, /* @tp_alloc@ */
3307 shake128_pynew, /* @tp_new@ */
3308 0, /* @tp_free@ */
3309 0 /* @tp_is_gc@ */
3310 };
3311
3312 static PyTypeObject shake256_pytype_skel = {
3313 PyObject_HEAD_INIT(0) 0, /* Header */
3314 "Shake256", /* @tp_name@ */
3315 0, /* @tp_basicsize@ */
3316 0, /* @tp_itemsize@ */
3317
3318 0, /* @tp_dealloc@ */
3319 0, /* @tp_print@ */
3320 0, /* @tp_getattr@ */
3321 0, /* @tp_setattr@ */
3322 0, /* @tp_compare@ */
3323 0, /* @tp_repr@ */
3324 0, /* @tp_as_number@ */
3325 0, /* @tp_as_sequence@ */
3326 0, /* @tp_as_mapping@ */
3327 0, /* @tp_hash@ */
3328 0, /* @tp_call@ */
3329 0, /* @tp_str@ */
3330 0, /* @tp_getattro@ */
3331 0, /* @tp_setattro@ */
3332 0, /* @tp_as_buffer@ */
3333 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3334 Py_TPFLAGS_BASETYPE,
3335
3336 /* @tp_doc@ */
3337 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3338
3339 0, /* @tp_traverse@ */
3340 0, /* @tp_clear@ */
3341 0, /* @tp_richcompare@ */
3342 0, /* @tp_weaklistoffset@ */
3343 0, /* @tp_iter@ */
3344 0, /* @tp_iternext@ */
3345 0, /* @tp_methods@ */
3346 0, /* @tp_members@ */
3347 0, /* @tp_getset@ */
3348 0, /* @tp_base@ */
3349 0, /* @tp_dict@ */
3350 0, /* @tp_descr_get@ */
3351 0, /* @tp_descr_set@ */
3352 0, /* @tp_dictoffset@ */
3353 0, /* @tp_init@ */
3354 PyType_GenericAlloc, /* @tp_alloc@ */
3355 shake256_pynew, /* @tp_new@ */
3356 0, /* @tp_free@ */
3357 0 /* @tp_is_gc@ */
3358 };
3359
3360 /*----- Pseudorandom permutations -----------------------------------------*/
3361
3362 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3363
3364 typedef struct prpinfo {
3365 const char *name;
3366 const octet *keysz;
3367 size_t ctxsz;
3368 size_t blksz;
3369 void (*init)(void *, const void *, size_t);
3370 void (*eblk)(void *, const void *, void *);
3371 void (*dblk)(void *, const void *, void *);
3372 } prpinfo;
3373
3374 #define PRP_DEF(PRE, pre) \
3375 static void pre##_prpinit(void *ctx, const void *k, size_t ksz) \
3376 { pre##_init(ctx, k, ksz); } \
3377 static void pre##_prpeblk(void *ctx, const void *in, void *out) \
3378 { \
3379 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3380 pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3381 } \
3382 static void pre##_prpdblk(void *ctx, const void *in, void *out) \
3383 { \
3384 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3385 pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3386 } \
3387 static const prpinfo pre##_prpinfo = { \
3388 #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ, \
3389 pre##_prpinit, pre##_prpeblk, pre##_prpdblk \
3390 };
3391 PRPS(PRP_DEF)
3392
3393 static const struct prpinfo *const gprptab[] = {
3394 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3395 PRPS(PRP_ENTRY)
3396 0
3397 };
3398
3399 typedef struct gcprp_pyobj {
3400 PyHeapTypeObject ty;
3401 const prpinfo *prp;
3402 } gcprp_pyobj;
3403 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3404
3405 typedef struct gprp_pyobj {
3406 PyObject_HEAD
3407 const prpinfo *prp;
3408 } gprp_pyobj;
3409 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3410 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3411
3412 typedef struct prp {
3413 const prpinfo *prp;
3414 void *ctx;
3415 } prp;
3416
3417 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3418 {
3419 static const char *const kwlist[] = { "key", 0 };
3420 char *k;
3421 Py_ssize_t sz;
3422 const prpinfo *prp = GCPRP_PRP(ty);
3423 PyObject *me;
3424
3425 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
3426 goto end;
3427 if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
3428 me = (PyObject *)ty->tp_alloc(ty, 0);
3429 GPRP_PRP(me) = prp;
3430 prp->init(GPRP_CTX(me), k, sz);
3431 Py_INCREF(me);
3432 return (me);
3433 end:
3434 return (0);
3435 }
3436
3437 static void gprp_pydealloc(PyObject *me)
3438 { Py_DECREF(me->ob_type); FREEOBJ(me); }
3439
3440 static PyObject *gcprp_pywrap(const prpinfo *prp)
3441 {
3442 gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3443 g->prp = prp;
3444 g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3445 g->ty.ht_type.tp_base = gprp_pytype;
3446 Py_INCREF(gprp_pytype);
3447 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3448 Py_TPFLAGS_BASETYPE |
3449 Py_TPFLAGS_HEAPTYPE);
3450 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3451 g->ty.ht_type.tp_free = 0;
3452 g->ty.ht_type.tp_new = gprp_pynew;
3453 typeready(&g->ty.ht_type);
3454 return ((PyObject *)g);
3455 }
3456
3457 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3458 { return (PyString_FromString(GCPRP_PRP(me)->name)); }
3459 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3460 { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3461 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3462 { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3463
3464 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3465 {
3466 char *p;
3467 Py_ssize_t n;
3468 PyObject *rc = 0;
3469
3470 if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
3471 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3472 rc = bytestring_pywrap(0, n);
3473 GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3474 end:
3475 return (rc);
3476 }
3477
3478 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3479 {
3480 char *p;
3481 Py_ssize_t n;
3482 PyObject *rc = 0;
3483
3484 if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
3485 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3486 rc = bytestring_pywrap(0, n);
3487 GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3488 end:
3489 return (rc);
3490 }
3491
3492 static const PyGetSetDef gcprp_pygetset[] = {
3493 #define GETSETNAME(op, name) gcp##op##_##name
3494 GET (keysz, "CP.keysz -> acceptable key sizes")
3495 GET (blksz, "CP.blksz -> block size")
3496 GET (name, "CP.name -> name of this kind of PRP")
3497 #undef GETSETNAME
3498 { 0 }
3499 };
3500
3501 static const PyMethodDef gprp_pymethods[] = {
3502 #define METHNAME(name) gpmeth_##name
3503 METH (encrypt, "P.encrypt(PT) -> CT")
3504 METH (decrypt, "P.decrypt(CT) -> PT")
3505 #undef METHNAME
3506 { 0 }
3507 };
3508
3509 static PyTypeObject gcprp_pytype_skel = {
3510 PyObject_HEAD_INIT(0) 0, /* Header */
3511 "GCPRP", /* @tp_name@ */
3512 sizeof(gcprp_pyobj), /* @tp_basicsize@ */
3513 0, /* @tp_itemsize@ */
3514
3515 0, /* @tp_dealloc@ */
3516 0, /* @tp_print@ */
3517 0, /* @tp_getattr@ */
3518 0, /* @tp_setattr@ */
3519 0, /* @tp_compare@ */
3520 0, /* @tp_repr@ */
3521 0, /* @tp_as_number@ */
3522 0, /* @tp_as_sequence@ */
3523 0, /* @tp_as_mapping@ */
3524 0, /* @tp_hash@ */
3525 0, /* @tp_call@ */
3526 0, /* @tp_str@ */
3527 0, /* @tp_getattro@ */
3528 0, /* @tp_setattro@ */
3529 0, /* @tp_as_buffer@ */
3530 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3531 Py_TPFLAGS_BASETYPE,
3532
3533 /* @tp_doc@ */
3534 "Pseudorandom permutation metaclass.",
3535
3536 0, /* @tp_traverse@ */
3537 0, /* @tp_clear@ */
3538 0, /* @tp_richcompare@ */
3539 0, /* @tp_weaklistoffset@ */
3540 0, /* @tp_iter@ */
3541 0, /* @tp_iternext@ */
3542 0, /* @tp_methods@ */
3543 0, /* @tp_members@ */
3544 PYGETSET(gcprp), /* @tp_getset@ */
3545 0, /* @tp_base@ */
3546 0, /* @tp_dict@ */
3547 0, /* @tp_descr_get@ */
3548 0, /* @tp_descr_set@ */
3549 0, /* @tp_dictoffset@ */
3550 0, /* @tp_init@ */
3551 PyType_GenericAlloc, /* @tp_alloc@ */
3552 abstract_pynew, /* @tp_new@ */
3553 0, /* @tp_free@ */
3554 0 /* @tp_is_gc@ */
3555 };
3556
3557 static PyTypeObject gprp_pytype_skel = {
3558 PyObject_HEAD_INIT(0) 0, /* Header */
3559 "GPRP", /* @tp_name@ */
3560 sizeof(gprp_pyobj), /* @tp_basicsize@ */
3561 0, /* @tp_itemsize@ */
3562
3563 gprp_pydealloc, /* @tp_dealloc@ */
3564 0, /* @tp_print@ */
3565 0, /* @tp_getattr@ */
3566 0, /* @tp_setattr@ */
3567 0, /* @tp_compare@ */
3568 0, /* @tp_repr@ */
3569 0, /* @tp_as_number@ */
3570 0, /* @tp_as_sequence@ */
3571 0, /* @tp_as_mapping@ */
3572 0, /* @tp_hash@ */
3573 0, /* @tp_call@ */
3574 0, /* @tp_str@ */
3575 0, /* @tp_getattro@ */
3576 0, /* @tp_setattro@ */
3577 0, /* @tp_as_buffer@ */
3578 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3579 Py_TPFLAGS_BASETYPE,
3580
3581 /* @tp_doc@ */
3582 "Pseudorandom permutation, abstract base class.",
3583
3584 0, /* @tp_traverse@ */
3585 0, /* @tp_clear@ */
3586 0, /* @tp_richcompare@ */
3587 0, /* @tp_weaklistoffset@ */
3588 0, /* @tp_iter@ */
3589 0, /* @tp_iternext@ */
3590 PYMETHODS(gprp), /* @tp_methods@ */
3591 0, /* @tp_members@ */
3592 0, /* @tp_getset@ */
3593 0, /* @tp_base@ */
3594 0, /* @tp_dict@ */
3595 0, /* @tp_descr_get@ */
3596 0, /* @tp_descr_set@ */
3597 0, /* @tp_dictoffset@ */
3598 0, /* @tp_init@ */
3599 PyType_GenericAlloc, /* @tp_alloc@ */
3600 abstract_pynew, /* @tp_new@ */
3601 0, /* @tp_free@ */
3602 0 /* @tp_is_gc@ */
3603 };
3604
3605 /*----- Main code ---------------------------------------------------------*/
3606
3607 static const PyMethodDef methods[] = {
3608 #define METHNAME(func) meth_##func
3609 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, \
3610 "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3611 METH_HDANCE(hsalsa20, "HSalsa20")
3612 METH_HDANCE(hsalsa2012, "HSalsa20/12")
3613 METH_HDANCE(hsalsa208, "HSalsa20/8")
3614 METH_HDANCE(hchacha20, "HChaCha20")
3615 METH_HDANCE(hchacha12, "HChaCha12")
3616 METH_HDANCE(hchacha8, "HChaCha8")
3617 #undef METH_DANCE
3618 #undef METHNAME
3619 { 0 }
3620 };
3621
3622 void algorithms_pyinit(void)
3623 {
3624 INITTYPE(keysz, root);
3625 INITTYPE(keyszany, keysz);
3626 INITTYPE(keyszrange, keysz);
3627 INITTYPE(keyszset, keysz);
3628 INITTYPE(gccipher, type);
3629 INITTYPE(gcipher, root);
3630 INITTYPE(gcaead, type);
3631 INITTYPE(gaeadkey, root);
3632 INITTYPE(gcaeadaad, type);
3633 INITTYPE(gaeadaad, root);
3634 INITTYPE(gcaeadenc, type);
3635 INITTYPE(gaeadenc, root);
3636 INITTYPE(gcaeaddec, type);
3637 INITTYPE(gaeaddec, root);
3638 INITTYPE(gchash, type);
3639 INITTYPE(ghash, root);
3640 INITTYPE(gcmac, type);
3641 INITTYPE(gmac, type);
3642 INITTYPE(gmhash, ghash);
3643 INITTYPE(poly1305cls, type);
3644 INITTYPE_META(poly1305key, type, poly1305cls);
3645 INITTYPE(poly1305hash, root);
3646 INITTYPE(kxvik, root);
3647 INITTYPE(shake, root);
3648 INITTYPE(shake128, shake);
3649 INITTYPE(shake256, shake);
3650 INITTYPE(gcprp, type);
3651 INITTYPE(gprp, root);
3652 addmethods(methods);
3653 }
3654
3655 GEN(gcciphers, cipher)
3656 GEN(gcaeads, aead)
3657 GEN(gchashes, hash)
3658 GEN(gcmacs, mac)
3659 #define gcprp prpinfo
3660 GEN(gcprps, prp)
3661
3662 void algorithms_pyinsert(PyObject *mod)
3663 {
3664 PyObject *d;
3665 INSERT("KeySZ", keysz_pytype);
3666 INSERT("KeySZAny", keyszany_pytype);
3667 INSERT("KeySZRange", keyszrange_pytype);
3668 INSERT("KeySZSet", keyszset_pytype);
3669 INSERT("GCCipher", gccipher_pytype);
3670 INSERT("GCipher", gcipher_pytype);
3671 INSERT("gcciphers", gcciphers());
3672 INSERT("GCAEAD", gcaead_pytype);
3673 INSERT("GAEKey", gaeadkey_pytype);
3674 INSERT("GAEAADClass", gcaeadaad_pytype);
3675 INSERT("GAEAAD", gaeadaad_pytype);
3676 INSERT("GAEEncClass", gcaeadenc_pytype);
3677 INSERT("GAEEnc", gaeadenc_pytype);
3678 INSERT("GAEDecClass", gcaeaddec_pytype);
3679 INSERT("GAEDec", gaeaddec_pytype);
3680 INSERT("gcaeads", gcaeads());
3681 INSERT("GCHash", gchash_pytype);
3682 INSERT("GHash", ghash_pytype);
3683 INSERT("gchashes", d = gchashes());
3684 sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3685 has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3686 INSERT("GCMAC", gcmac_pytype);
3687 INSERT("GMAC", gmac_pytype);
3688 INSERT("GMACHash", gmhash_pytype);
3689 INSERT("gcmacs", gcmacs());
3690 INSERT("Poly1305Class", poly1305cls_pytype);
3691 INSERT("poly1305", poly1305key_pytype);
3692 INSERT("Poly1305Hash", poly1305hash_pytype);
3693 INSERT("Keccak1600", kxvik_pytype);
3694 INSERT("Shake", shake_pytype);
3695 INSERT("Shake128", shake128_pytype);
3696 INSERT("Shake256", shake256_pytype);
3697 INSERT("GCPRP", gcprp_pytype);
3698 INSERT("GPRP", gprp_pytype);
3699 INSERT("gcprps", gcprps());
3700 }
3701
3702 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings