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*.c: Use Python `METH_NOARGS' methods where applicable.
[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)
644 {
645 if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
646 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
647 GC_BDRY(GCIPHER_C(me));
648 RETURN_ME;
649 end:
650 return (0);
651 }
652
653 static const PyGetSetDef gccipher_pygetset[] = {
654 #define GETSETNAME(op, name) gcc##op##_##name
655 GET (keysz, "CC.keysz -> acceptable key sizes")
656 GET (blksz, "CC.blksz -> block size, or zero")
657 GET (name, "CC.name -> name of this kind of cipher")
658 #undef GETSETNAME
659 { 0 }
660 };
661
662 static const PyMethodDef gcipher_pymethods[] = {
663 #define METHNAME(name) gcmeth_##name
664 METH (encrypt, "C.encrypt(PT) -> CT")
665 METH (enczero, "C.enczero(N) -> CT")
666 METH (decrypt, "C.decrypt(CT) -> PT")
667 METH (deczero, "C.deczero(N) -> PT")
668 METH (setiv, "C.setiv(IV)")
669 NAMETH(bdry, "C.bdry()")
670 #undef METHNAME
671 { 0 }
672 };
673
674 static PyTypeObject gccipher_pytype_skel = {
675 PyObject_HEAD_INIT(0) 0, /* Header */
676 "GCCipher", /* @tp_name@ */
677 sizeof(gccipher_pyobj), /* @tp_basicsize@ */
678 0, /* @tp_itemsize@ */
679
680 0, /* @tp_dealloc@ */
681 0, /* @tp_print@ */
682 0, /* @tp_getattr@ */
683 0, /* @tp_setattr@ */
684 0, /* @tp_compare@ */
685 0, /* @tp_repr@ */
686 0, /* @tp_as_number@ */
687 0, /* @tp_as_sequence@ */
688 0, /* @tp_as_mapping@ */
689 0, /* @tp_hash@ */
690 0, /* @tp_call@ */
691 0, /* @tp_str@ */
692 0, /* @tp_getattro@ */
693 0, /* @tp_setattro@ */
694 0, /* @tp_as_buffer@ */
695 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
696 Py_TPFLAGS_BASETYPE,
697
698 /* @tp_doc@ */
699 "Symmetric cipher metaclass.",
700
701 0, /* @tp_traverse@ */
702 0, /* @tp_clear@ */
703 0, /* @tp_richcompare@ */
704 0, /* @tp_weaklistoffset@ */
705 0, /* @tp_iter@ */
706 0, /* @tp_iternext@ */
707 0, /* @tp_methods@ */
708 0, /* @tp_members@ */
709 PYGETSET(gccipher), /* @tp_getset@ */
710 0, /* @tp_base@ */
711 0, /* @tp_dict@ */
712 0, /* @tp_descr_get@ */
713 0, /* @tp_descr_set@ */
714 0, /* @tp_dictoffset@ */
715 0, /* @tp_init@ */
716 PyType_GenericAlloc, /* @tp_alloc@ */
717 abstract_pynew, /* @tp_new@ */
718 0, /* @tp_free@ */
719 0 /* @tp_is_gc@ */
720 };
721
722 static PyTypeObject gcipher_pytype_skel = {
723 PyObject_HEAD_INIT(0) 0, /* Header */
724 "GCipher", /* @tp_name@ */
725 sizeof(gcipher_pyobj), /* @tp_basicsize@ */
726 0, /* @tp_itemsize@ */
727
728 gcipher_pydealloc, /* @tp_dealloc@ */
729 0, /* @tp_print@ */
730 0, /* @tp_getattr@ */
731 0, /* @tp_setattr@ */
732 0, /* @tp_compare@ */
733 0, /* @tp_repr@ */
734 0, /* @tp_as_number@ */
735 0, /* @tp_as_sequence@ */
736 0, /* @tp_as_mapping@ */
737 0, /* @tp_hash@ */
738 0, /* @tp_call@ */
739 0, /* @tp_str@ */
740 0, /* @tp_getattro@ */
741 0, /* @tp_setattro@ */
742 0, /* @tp_as_buffer@ */
743 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
744 Py_TPFLAGS_BASETYPE,
745
746 /* @tp_doc@ */
747 "Symmetric cipher, abstract base class.",
748
749 0, /* @tp_traverse@ */
750 0, /* @tp_clear@ */
751 0, /* @tp_richcompare@ */
752 0, /* @tp_weaklistoffset@ */
753 0, /* @tp_iter@ */
754 0, /* @tp_iternext@ */
755 PYMETHODS(gcipher), /* @tp_methods@ */
756 0, /* @tp_members@ */
757 0, /* @tp_getset@ */
758 0, /* @tp_base@ */
759 0, /* @tp_dict@ */
760 0, /* @tp_descr_get@ */
761 0, /* @tp_descr_set@ */
762 0, /* @tp_dictoffset@ */
763 0, /* @tp_init@ */
764 PyType_GenericAlloc, /* @tp_alloc@ */
765 abstract_pynew, /* @tp_new@ */
766 0, /* @tp_free@ */
767 0 /* @tp_is_gc@ */
768 };
769
770 /*----- Authenticated encryption ------------------------------------------*/
771
772 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
773 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
774 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
775 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
776
777 typedef struct gcaead_pyobj {
778 PyHeapTypeObject ty;
779 gcaead *aec;
780 struct gcaeadaad_pyobj *aad;
781 struct gcaeadenc_pyobj *enc;
782 struct gcaeaddec_pyobj *dec;
783 } gcaead_pyobj;
784
785 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
786 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
787 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
788 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
789 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
790 static PyObject *gcaead_pywrap(gcaead *);
791
792 typedef struct gaeadkey_pyobj {
793 PyObject_HEAD
794 gaead_key *k;
795 } gaeadkey_pyobj;
796
797 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
798 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
799
800 typedef struct gcaeadaad_pyobj {
801 PyHeapTypeObject ty;
802 gcaead_pyobj *key;
803 } gcaeadaad_pyobj;
804
805 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
806 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
807
808 typedef struct gaeadaad_pyobj {
809 PyObject_HEAD
810 gaead_aad *a;
811 unsigned f;
812 #define AEADF_DEAD 32768u
813 size_t hsz, hlen;
814 } gaeadaad_pyobj;
815
816 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
817 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
818 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
819 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
820 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
821
822 typedef struct gcaeadenc_pyobj {
823 PyHeapTypeObject ty;
824 gcaead_pyobj *key;
825 } gcaeadenc_pyobj;
826
827 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
828 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
829 size_t, size_t, size_t);
830
831 typedef struct gaeadenc_pyobj {
832 PyObject_HEAD
833 gaead_enc *e;
834 gaeadaad_pyobj *aad;
835 unsigned f;
836 size_t hsz, msz, tsz;
837 size_t mlen;
838 } gaeadenc_pyobj;
839
840 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
841 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
842 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
843 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
844 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
845 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
846 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
847 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
848
849 typedef struct gcaeaddec_pyobj {
850 PyHeapTypeObject ty;
851 gcaead_pyobj *key;
852 } gcaeaddec_pyobj;
853
854 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
855 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
856 size_t, size_t, size_t);
857
858 typedef struct gaeaddec_pyobj {
859 PyObject_HEAD
860 gaead_dec *d;
861 gaeadaad_pyobj *aad;
862 unsigned f;
863 size_t hsz, csz, tsz;
864 size_t clen;
865 } gaeaddec_pyobj;
866
867 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
868 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
869 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
870 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
871 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
872 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
873 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
874 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
875
876 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
877 {
878 gaeadkey_pyobj *gk;
879
880 if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
881 else Py_INCREF(cobj);
882 gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
883 gk->k = k;
884 return ((PyObject *)gk);
885 }
886
887 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
888 PyObject *arg, PyObject *kw)
889 {
890 static const char *const kwlist[] = { "k", 0 };
891 char *k;
892 Py_ssize_t sz;
893
894 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
895 goto end;
896 if (keysz(sz, GCAEAD_AEC(ty)->keysz) != sz) VALERR("bad key length");
897 return (gaeadkey_pywrap((PyObject *)ty,
898 GAEAD_KEY(GCAEAD_AEC(ty), k, sz)));
899 end:
900 return (0);
901 }
902
903 static PyObject *gcaead_pywrap(gcaead *aec)
904 {
905 gcaead_pyobj *gck;
906 gcaeadaad_pyobj *gca;
907 gcaeadenc_pyobj *gce;
908 gcaeaddec_pyobj *gcd;
909
910 #define MKTYPE(obj, thing, newfn, namefmt) do { \
911 (obj) = newtype(gcaead_pytype, 0, 0); \
912 (obj)->ty.ht_name = PyString_FromFormat(namefmt, aec->name); \
913 (obj)->ty.ht_type.tp_name = PyString_AS_STRING((obj)->ty.ht_name); \
914 (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj); \
915 (obj)->ty.ht_type.tp_base = gaead##thing##_pytype; \
916 Py_INCREF(gaead##thing##_pytype); \
917 (obj)->ty.ht_type.tp_flags = \
918 (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE); \
919 (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc; \
920 (obj)->ty.ht_type.tp_free = 0; \
921 (obj)->ty.ht_type.tp_new = newfn; \
922 typeready(&(obj)->ty.ht_type); \
923 } while (0)
924
925 MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
926 MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
927 MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
928 MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
929
930 #undef MKTYPE
931
932 gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
933 gca->key = gce->key = gcd->key = gck;
934 return ((PyObject *)gck);
935 }
936
937 static void gaeadkey_pydealloc(PyObject *me)
938 { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(me->ob_type); FREEOBJ(me); }
939
940 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
941 { return (PyString_FromString(GCAEAD_AEC(me)->name)); }
942
943 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
944 { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
945
946 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
947 { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
948
949 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
950 { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
951
952 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
953 { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
954
955 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
956 { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
957
958 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
959 { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
960
961 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
962 { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
963
964 static const PyGetSetDef gcaead_pygetset[] = {
965 #define GETSETNAME(op, name) gcae##op##_##name
966 GET (keysz, "AEC.keysz -> acceptable key sizes")
967 GET (noncesz, "AEC.noncesz -> acceptable nonce sizes")
968 GET (tagsz, "AEC.tagsz -> acceptable tag sizes")
969 GET (blksz, "AEC.blksz -> block size, or zero")
970 GET (bufsz, "AEC.bufsz -> amount of data buffered internally")
971 GET (ohd, "AEC.ohd -> maximum encryption overhead")
972 GET (name, "AEC.name -> name of this kind of AEAD scheme")
973 GET (flags, "AEC.flags -> mask of `AEADF_...' flags")
974 #undef GETSETNAME
975 { 0 }
976 };
977
978 static PyObject *gaekmeth_aad(PyObject *me)
979 {
980 const gaead_key *k = GAEADKEY_K(me);
981 PyObject *rc = 0;
982
983 if (k->ops->c->f&AEADF_AADNDEP)
984 VALERR("aad must be associated with enc/dec op");
985 rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(me->ob_type),
986 GAEAD_AAD(k), 0, 0);
987 end:
988 return (rc);
989 }
990
991 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
992 PyObject *hszobj, size_t *hsz_out,
993 PyObject *mszobj, size_t *msz_out,
994 PyObject *tszobj, size_t *tsz_out)
995 {
996 unsigned f = 0, miss;
997 int rc = -1;
998
999 if (hszobj != Py_None)
1000 { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
1001 if (mszobj != Py_None)
1002 { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
1003 if (tszobj != Py_None)
1004 { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
1005 miss = aec->f&~f;
1006 if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1007 if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1008 if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1009 if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1010 if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1011 VALERR("bad tag length");
1012 *f_out = f | aec->f; rc = 0;
1013 end:
1014 return (rc);
1015 }
1016
1017 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1018 {
1019 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1020 const gaead_key *k = GAEADKEY_K(me);
1021 gaead_enc *e;
1022 PyObject *rc = 0;
1023 char *n; Py_ssize_t nsz;
1024 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1025 size_t hsz = 0, msz = 0, tsz = 0;
1026 unsigned f;
1027
1028 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1029 &n, &nsz, &hszobj, &mszobj, &tszobj))
1030 goto end;
1031 if (check_aead_encdec(k->ops->c, &f, nsz,
1032 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1033 goto end;
1034 e = GAEAD_ENC(GAEADKEY_K(me), n, nsz, hsz, msz, tsz);
1035 if (!e) VALERR("bad aead parameter combination");
1036 rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(me->ob_type),
1037 e, f, hsz, msz, tsz);
1038 end:
1039 return (rc);
1040 }
1041
1042 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1043 {
1044 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1045 const gaead_key *k = GAEADKEY_K(me);
1046 gaead_dec *d;
1047 PyObject *rc = 0;
1048 char *n; Py_ssize_t nsz;
1049 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1050 size_t hsz = 0, csz = 0, tsz = 0;
1051 unsigned f;
1052
1053 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:dec", KWLIST,
1054 &n, &nsz, &hszobj, &cszobj, &tszobj))
1055 goto end;
1056 if (check_aead_encdec(k->ops->c, &f, nsz,
1057 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1058 goto end;
1059 d = GAEAD_DEC(GAEADKEY_K(me), n, nsz, hsz, csz, tsz);
1060 if (!d) VALERR("bad aead parameter combination");
1061 rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(me->ob_type),
1062 d, f, hsz, csz, tsz);
1063 end:
1064 return (rc);
1065 }
1066
1067 static const PyMethodDef gaeadkey_pymethods[] = {
1068 #define METHNAME(name) gaekmeth_##name
1069 NAMETH(aad, "KEY.aad() -> AAD")
1070 KWMETH(enc, "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1071 KWMETH(dec, "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1072 #undef METHNAME
1073 { 0 }
1074 };
1075
1076 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1077 unsigned f, size_t hsz)
1078 {
1079 gaeadaad_pyobj *ga;
1080
1081 assert(cobj); Py_INCREF(cobj);
1082 ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1083 ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1084 return ((PyObject *)ga);
1085 }
1086
1087 static void gaeadaad_pydealloc(PyObject *me)
1088 {
1089 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1090
1091 if (ga->a) GAEAD_DESTROY(ga->a);
1092 Py_DECREF(me->ob_type); FREEOBJ(me);
1093 }
1094
1095 static int gaea_check(PyObject *me)
1096 {
1097 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1098 int rc = -1;
1099
1100 if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1101 rc = 0;
1102 end:
1103 return (rc);
1104 }
1105
1106 static void gaea_invalidate(gaeadaad_pyobj *ga)
1107 { if (ga) ga->f |= AEADF_DEAD; }
1108
1109 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1110 {
1111 gaeadaad_pyobj *ga = *ga_inout;
1112 if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1113 }
1114
1115 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1116 {
1117 if (gaea_check(me)) return (0);
1118 else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1119 else RETURN_NONE;
1120 }
1121
1122 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1123 { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1124
1125 static const PyGetSetDef gaeadaad_pygetset[] = {
1126 #define GETSETNAME(op, name) gaea##op##_##name
1127 GET (hsz, "AAD.hsz -> precommitted header length or `None'")
1128 GET (hlen, "AAD.hlen -> header length so far")
1129 #undef GETSETNAME
1130 { 0 }
1131 };
1132
1133 static PyObject *gaeameth_copy(PyObject *me)
1134 {
1135 PyObject *rc = 0;
1136
1137 if (gaea_check(me)) goto end;
1138 if (GAEADAAD_F(me)&AEADF_AADNDEP)
1139 VALERR("can't duplicate nonce-dependent aad");
1140 rc = gaeadaad_pywrap((PyObject *)me->ob_type,
1141 GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1142 GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1143 end:
1144 return (rc);
1145 }
1146
1147 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1148 {
1149 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1150 int rc = -1;
1151
1152 if (gaea_check(me)) goto end;
1153 if ((ga->f&AEADF_NOAAD) && hsz)
1154 VALERR("header data not permitted");
1155 if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1156 VALERR("too large for precommitted header length");
1157 GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1158 rc = 0;
1159 end:
1160 return (rc);
1161 }
1162
1163
1164 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1165 {
1166 char *h; Py_ssize_t hsz;
1167
1168 if (!PyArg_ParseTuple(arg, "s#:hash", &h, &hsz)) return (0);
1169 if (gaeadaad_hash(me, h, hsz)) return (0);
1170 RETURN_ME;
1171 }
1172
1173 #define GAEAMETH_HASHU_(n, W, w) \
1174 static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg) \
1175 { \
1176 uint##n x; octet b[SZ_##W]; \
1177 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1178 STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0); \
1179 RETURN_ME; \
1180 }
1181 DOUINTCONV(GAEAMETH_HASHU_)
1182
1183 #define GAEAMETH_HASHBUF_(n, W, w) \
1184 static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg) \
1185 { \
1186 char *p; Py_ssize_t sz; octet b[SZ_##W]; \
1187 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
1188 if (sz > MASK##n) TYERR("string too long"); \
1189 STORE##W(b, sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end; \
1190 if (gaeadaad_hash(me, p, sz)) goto end; \
1191 RETURN_ME; \
1192 end: \
1193 return (0); \
1194 }
1195 DOUINTCONV(GAEAMETH_HASHBUF_)
1196
1197 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1198 {
1199 char *p;
1200 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1201 if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1202 RETURN_ME;
1203 }
1204
1205 static const PyMethodDef gaeadaad_pymethods[] = {
1206 #define METHNAME(name) gaeameth_##name
1207 NAMETH(copy, "AAD.copy() -> AAD'")
1208 METH (hash, "AAD.hash(H)")
1209 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1210 DOUINTCONV(METHU_)
1211 #undef METHU_
1212 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1213 DOUINTCONV(METHBUF_)
1214 #undef METHBUF_
1215 METH (hashstrz, "AAD.hashstrz(STRING)")
1216 #undef METHNAME
1217 { 0 }
1218 };
1219
1220 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1221 size_t hsz, size_t msz, size_t tsz)
1222 {
1223 gaeadenc_pyobj *ge;
1224
1225 assert(cobj); Py_INCREF(cobj);
1226 ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1227 ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1228 ge->aad = 0; ge->mlen = 0;
1229 return ((PyObject *)ge);
1230 }
1231
1232 static void gaeadenc_pydealloc(PyObject *me)
1233 {
1234 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1235
1236 gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1237 Py_DECREF(me->ob_type); FREEOBJ(me);
1238 }
1239
1240 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1241 {
1242 if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1243 else RETURN_NONE;
1244 }
1245
1246 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1247 {
1248 if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1249 else RETURN_NONE;
1250 }
1251
1252 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1253 {
1254 if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1255 else RETURN_NONE;
1256 }
1257
1258 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1259 { return getulong(GAEADENC_MLEN(me)); }
1260
1261 static const PyGetSetDef gaeadenc_pygetset[] = {
1262 #define GETSETNAME(op, name) gaee##op##_##name
1263 GET (hsz, "ENC.hsz -> precommitted header length or `None'")
1264 GET (msz, "ENC.msz -> precommitted message length or `None'")
1265 GET (tsz, "ENC.tsz -> precommitted tag length or `None'")
1266 GET (mlen, "ENC.mlen -> message length so far")
1267 #undef GETSETNAME
1268 { 0 }
1269 };
1270
1271 static PyObject *gaeemeth_aad(PyObject *me)
1272 {
1273 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1274 PyObject *rc = 0;
1275
1276 if (!(ge->f&AEADF_AADNDEP))
1277 rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1278 GAEAD_AAD(ge->e), 0, 0);
1279 else {
1280 if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1281 VALERR("too late for aad");
1282 if (!ge->aad)
1283 ge->aad = (gaeadaad_pyobj *)
1284 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1285 GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1286 ge->hsz);
1287 Py_INCREF(ge->aad);
1288 rc = (PyObject *)ge->aad;
1289 }
1290 end:
1291 return (rc);
1292 }
1293
1294 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1295 {
1296 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1297 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1298 char *n; Py_ssize_t nsz;
1299 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1300 size_t hsz = 0, msz = 0, tsz = 0;
1301 unsigned f;
1302
1303 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1304 &n, &nsz, &hszobj, &mszobj, &tszobj))
1305 goto end;
1306 if (check_aead_encdec(ge->e->ops->c, &f, nsz,
1307 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1308 goto end;
1309 if (GAEAD_REINIT(ge->e, n, nsz, hsz, msz, tsz))
1310 VALERR("bad aead parameter combination");
1311 gaea_sever(&ge->aad);
1312 ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1313 end:
1314 return (0);
1315 }
1316
1317 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1318 {
1319 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1320 char *m; Py_ssize_t msz;
1321 char *c = 0; size_t csz; buf b;
1322 int err;
1323 PyObject *rc = 0;
1324
1325 if (!PyArg_ParseTuple(arg, "s#:encrypt", &m, &msz)) goto end;
1326 if (ge->f&AEADF_AADFIRST) {
1327 if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1328 VALERR("header doesn't match precommitted length");
1329 gaea_invalidate(ge->aad);
1330 }
1331 if ((ge->f&AEADF_PCMSZ) && msz > ge->msz - ge->mlen)
1332 VALERR("too large for precommitted message length");
1333 csz = msz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1334 err = GAEAD_ENCRYPT(ge->e, m, msz, &b); assert(!err); (void)err;
1335 buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += msz;
1336 end:
1337 xfree(c);
1338 return (rc);
1339 }
1340
1341 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1342 {
1343 static const char *const kwlist[] = { "tsz", "aad", 0 };
1344 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1345 PyObject *aad = Py_None;
1346 char *c = 0; size_t csz; buf b;
1347 PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1348 int err;
1349 PyObject *rc = 0;
1350
1351 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1352 &tszobj, &aad))
1353 goto end;
1354 if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1355 if (aad != Py_None &&
1356 !PyObject_TypeCheck(aad,
1357 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1358 TYERR("wanted aad");
1359 if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1360 VALERR("mismatched aad");
1361 if ((ge->f&AEADF_PCHSZ) &&
1362 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1363 VALERR("header doesn't match precommitted length");
1364 if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1365 VALERR("message doesn't match precommitted length");
1366 if (tszobj == Py_None) {
1367 if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1368 else tsz = keysz(0, ge->e->ops->c->tagsz);
1369 } else {
1370 if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1371 VALERR("tag length doesn't match precommitted value");
1372 if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1373 }
1374 csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1375 tag = bytestring_pywrap(0, tsz);
1376 err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1377 PyString_AS_STRING(tag), tsz);
1378 assert(!err); (void)err;
1379 buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1380 end:
1381 xfree(c);
1382 return (rc);
1383 }
1384
1385 static const PyMethodDef gaeadenc_pymethods[] = {
1386 #define METHNAME(name) gaeemeth_##name
1387 NAMETH(aad, "ENC.aad() -> AAD")
1388 KWMETH(reinit, "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1389 METH (encrypt, "ENC.encrypt(MSG) -> CT")
1390 KWMETH(done, "ENC.done([tsz], [aad]) -> CT, TAG")
1391 #undef METHNAME
1392 { 0 }
1393 };
1394
1395 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1396 size_t hsz, size_t csz, size_t tsz)
1397 {
1398 gaeaddec_pyobj *gd;
1399 assert(cobj); Py_INCREF(cobj);
1400 gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1401 gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1402 gd->aad = 0; gd->clen = 0;
1403 return ((PyObject *)gd);
1404 }
1405
1406 static void gaeaddec_pydealloc(PyObject *me)
1407 {
1408 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1409
1410 gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1411 Py_DECREF(me->ob_type); FREEOBJ(me);
1412 }
1413
1414 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1415 {
1416 if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1417 else RETURN_NONE;
1418 }
1419
1420 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1421 {
1422 if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1423 else RETURN_NONE;
1424 }
1425
1426 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1427 {
1428 if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1429 else RETURN_NONE;
1430 }
1431
1432 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1433 { return getulong(GAEADDEC_CLEN(me)); }
1434
1435 static const PyGetSetDef gaeaddec_pygetset[] = {
1436 #define GETSETNAME(op, name) gaed##op##_##name
1437 GET (hsz, "DEC.hsz -> precommitted header length or `None'")
1438 GET (csz, "DEC.csz -> precommitted ciphertext length or `None'")
1439 GET (tsz, "DEC.tsz -> precommitted tag length or `None'")
1440 GET (clen, "DEC.clen -> ciphertext length so far")
1441 #undef GETSETNAME
1442 { 0 }
1443 };
1444
1445 static PyObject *gaedmeth_aad(PyObject *me)
1446 {
1447 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1448
1449 if (!(gd->f&AEADF_AADNDEP))
1450 return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(gd->ob_type)->aad,
1451 GAEAD_AAD(gd->d), 0, 0));
1452 else {
1453 if (!gd->aad)
1454 gd->aad = (gaeadaad_pyobj *)
1455 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(gd->ob_type)->aad,
1456 GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1457 gd->hsz);
1458 Py_INCREF(gd->aad);
1459 return ((PyObject *)gd->aad);
1460 }
1461 }
1462
1463 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1464 {
1465 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1466 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1467 char *n; Py_ssize_t nsz;
1468 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1469 size_t hsz = 0, csz = 0, tsz = 0;
1470 unsigned f;
1471
1472 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1473 &n, &nsz, &hszobj, &cszobj, &tszobj))
1474 goto end;
1475 if (check_aead_encdec(gd->d->ops->c, &f, nsz,
1476 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1477 goto end;
1478 if (GAEAD_REINIT(gd->d, n, nsz, hsz, csz, tsz))
1479 VALERR("bad aead parameter combination");
1480 gaea_sever(&gd->aad);
1481 gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1482 end:
1483 return (0);
1484 }
1485
1486 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1487 {
1488 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1489 char *c; Py_ssize_t csz;
1490 char *m = 0; size_t msz; buf b;
1491 int err;
1492 PyObject *rc = 0;
1493
1494 if (!PyArg_ParseTuple(arg, "s#:decrypt", &c, &csz)) goto end;
1495 if (gd->f&AEADF_AADFIRST) {
1496 if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1497 VALERR("header doesn't match precommitted length");
1498 gaea_invalidate(gd->aad);
1499 }
1500 if ((gd->f&AEADF_PCMSZ) && csz > gd->csz - gd->clen)
1501 VALERR("too large for precommitted message length");
1502 msz = csz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1503 err = GAEAD_DECRYPT(gd->d, c, csz, &b); assert(!err); (void)err;
1504 buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += csz;
1505 end:
1506 xfree(m);
1507 return (rc);
1508 }
1509
1510 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1511 {
1512 static const char *const kwlist[] = { "tag", "aad", 0 };
1513 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1514 PyObject *aad = Py_None;
1515 char *t; Py_ssize_t tsz;
1516 char *m = 0; size_t msz; buf b;
1517 int err;
1518 PyObject *rc = 0;
1519
1520 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O:done", KWLIST,
1521 &t, &tsz, &aad))
1522 goto end;
1523 if (aad != Py_None &&
1524 !PyObject_TypeCheck(aad,
1525 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1526 TYERR("wanted aad");
1527 if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1528 VALERR("mismatched aad");
1529 if ((gd->f&AEADF_PCHSZ) &&
1530 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1531 VALERR("header doesn't match precommitted length");
1532 if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1533 VALERR("message doesn't match precommitted length");
1534 if ((gd->f&AEADF_PCTSZ) && tsz != gd->tsz)
1535 VALERR("tag length doesn't match precommitted value");
1536 if (keysz(tsz, gd->d->ops->c->tagsz) != tsz) VALERR("bad tag length");
1537 msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1538 err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad), &b, t, tsz);
1539 assert(err >= 0);
1540 if (!err) VALERR("decryption failed");
1541 buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1542 end:
1543 xfree(m);
1544 return (rc);
1545 }
1546
1547 static const PyMethodDef gaeaddec_pymethods[] = {
1548 #define METHNAME(name) gaedmeth_##name
1549 NAMETH(aad, "DEC.aad() -> AAD")
1550 KWMETH(reinit, "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1551 METH (decrypt, "DEC.decrypt(CT) -> MSG")
1552 KWMETH(done, "DEC.done(TAG, [aad]) -> MSG | None")
1553 #undef METHNAME
1554 { 0 }
1555 };
1556
1557 static PyTypeObject gcaead_pytype_skel = {
1558 PyObject_HEAD_INIT(0) 0, /* Header */
1559 "GCAEAD", /* @tp_name@ */
1560 sizeof(gcaead_pyobj), /* @tp_basicsize@ */
1561 0, /* @tp_itemsize@ */
1562
1563 0, /* @tp_dealloc@ */
1564 0, /* @tp_print@ */
1565 0, /* @tp_getattr@ */
1566 0, /* @tp_setattr@ */
1567 0, /* @tp_compare@ */
1568 0, /* @tp_repr@ */
1569 0, /* @tp_as_number@ */
1570 0, /* @tp_as_sequence@ */
1571 0, /* @tp_as_mapping@ */
1572 0, /* @tp_hash@ */
1573 0, /* @tp_call@ */
1574 0, /* @tp_str@ */
1575 0, /* @tp_getattro@ */
1576 0, /* @tp_setattro@ */
1577 0, /* @tp_as_buffer@ */
1578 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1579 Py_TPFLAGS_BASETYPE,
1580
1581 /* @tp_doc@ */
1582 "Authenticated encryption (key) metaclass.",
1583
1584 0, /* @tp_traverse@ */
1585 0, /* @tp_clear@ */
1586 0, /* @tp_richcompare@ */
1587 0, /* @tp_weaklistoffset@ */
1588 0, /* @tp_iter@ */
1589 0, /* @tp_iternext@ */
1590 0, /* @tp_methods@ */
1591 0, /* @tp_members@ */
1592 PYGETSET(gcaead), /* @tp_getset@ */
1593 0, /* @tp_base@ */
1594 0, /* @tp_dict@ */
1595 0, /* @tp_descr_get@ */
1596 0, /* @tp_descr_set@ */
1597 0, /* @tp_dictoffset@ */
1598 0, /* @tp_init@ */
1599 PyType_GenericAlloc, /* @tp_alloc@ */
1600 abstract_pynew, /* @tp_new@ */
1601 0, /* @tp_free@ */
1602 0 /* @tp_is_gc@ */
1603 };
1604
1605 static PyTypeObject gaeadkey_pytype_skel = {
1606 PyObject_HEAD_INIT(0) 0, /* Header */
1607 "GAEKey", /* @tp_name@ */
1608 sizeof(gaeadkey_pyobj), /* @tp_basicsize@ */
1609 0, /* @tp_itemsize@ */
1610
1611 gaeadkey_pydealloc, /* @tp_dealloc@ */
1612 0, /* @tp_print@ */
1613 0, /* @tp_getattr@ */
1614 0, /* @tp_setattr@ */
1615 0, /* @tp_compare@ */
1616 0, /* @tp_repr@ */
1617 0, /* @tp_as_number@ */
1618 0, /* @tp_as_sequence@ */
1619 0, /* @tp_as_mapping@ */
1620 0, /* @tp_hash@ */
1621 0, /* @tp_call@ */
1622 0, /* @tp_str@ */
1623 0, /* @tp_getattro@ */
1624 0, /* @tp_setattro@ */
1625 0, /* @tp_as_buffer@ */
1626 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1627 Py_TPFLAGS_BASETYPE,
1628
1629 /* @tp_doc@ */
1630 "Authenticated encryption key.",
1631
1632 0, /* @tp_traverse@ */
1633 0, /* @tp_clear@ */
1634 0, /* @tp_richcompare@ */
1635 0, /* @tp_weaklistoffset@ */
1636 0, /* @tp_iter@ */
1637 0, /* @tp_iternext@ */
1638 PYMETHODS(gaeadkey), /* @tp_methods@ */
1639 0, /* @tp_members@ */
1640 0, /* @tp_getset@ */
1641 0, /* @tp_base@ */
1642 0, /* @tp_dict@ */
1643 0, /* @tp_descr_get@ */
1644 0, /* @tp_descr_set@ */
1645 0, /* @tp_dictoffset@ */
1646 0, /* @tp_init@ */
1647 PyType_GenericAlloc, /* @tp_alloc@ */
1648 abstract_pynew, /* @tp_new@ */
1649 0, /* @tp_free@ */
1650 0 /* @tp_is_gc@ */
1651 };
1652
1653 static PyTypeObject gcaeadaad_pytype_skel = {
1654 PyObject_HEAD_INIT(0) 0, /* Header */
1655 "GAEAADClass", /* @tp_name@ */
1656 sizeof(gcaeadaad_pyobj), /* @tp_basicsize@ */
1657 0, /* @tp_itemsize@ */
1658
1659 0, /* @tp_dealloc@ */
1660 0, /* @tp_print@ */
1661 0, /* @tp_getattr@ */
1662 0, /* @tp_setattr@ */
1663 0, /* @tp_compare@ */
1664 0, /* @tp_repr@ */
1665 0, /* @tp_as_number@ */
1666 0, /* @tp_as_sequence@ */
1667 0, /* @tp_as_mapping@ */
1668 0, /* @tp_hash@ */
1669 0, /* @tp_call@ */
1670 0, /* @tp_str@ */
1671 0, /* @tp_getattro@ */
1672 0, /* @tp_setattro@ */
1673 0, /* @tp_as_buffer@ */
1674 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1675 Py_TPFLAGS_BASETYPE,
1676
1677 /* @tp_doc@ */
1678 "Authenticated encryption additional-data hash metaclass.",
1679
1680 0, /* @tp_traverse@ */
1681 0, /* @tp_clear@ */
1682 0, /* @tp_richcompare@ */
1683 0, /* @tp_weaklistoffset@ */
1684 0, /* @tp_iter@ */
1685 0, /* @tp_iternext@ */
1686 0, /* @tp_methods@ */
1687 0, /* @tp_members@ */
1688 0, /* @tp_getset@ */
1689 0, /* @tp_base@ */
1690 0, /* @tp_dict@ */
1691 0, /* @tp_descr_get@ */
1692 0, /* @tp_descr_set@ */
1693 0, /* @tp_dictoffset@ */
1694 0, /* @tp_init@ */
1695 PyType_GenericAlloc, /* @tp_alloc@ */
1696 abstract_pynew, /* @tp_new@ */
1697 0, /* @tp_free@ */
1698 0 /* @tp_is_gc@ */
1699 };
1700
1701 static PyTypeObject gaeadaad_pytype_skel = {
1702 PyObject_HEAD_INIT(0) 0, /* Header */
1703 "GAEAAD", /* @tp_name@ */
1704 sizeof(gaeadaad_pyobj), /* @tp_basicsize@ */
1705 0, /* @tp_itemsize@ */
1706
1707 gaeadaad_pydealloc, /* @tp_dealloc@ */
1708 0, /* @tp_print@ */
1709 0, /* @tp_getattr@ */
1710 0, /* @tp_setattr@ */
1711 0, /* @tp_compare@ */
1712 0, /* @tp_repr@ */
1713 0, /* @tp_as_number@ */
1714 0, /* @tp_as_sequence@ */
1715 0, /* @tp_as_mapping@ */
1716 0, /* @tp_hash@ */
1717 0, /* @tp_call@ */
1718 0, /* @tp_str@ */
1719 0, /* @tp_getattro@ */
1720 0, /* @tp_setattro@ */
1721 0, /* @tp_as_buffer@ */
1722 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1723 Py_TPFLAGS_BASETYPE,
1724
1725 /* @tp_doc@ */
1726 "Authenticated encryption AAD hash.",
1727
1728 0, /* @tp_traverse@ */
1729 0, /* @tp_clear@ */
1730 0, /* @tp_richcompare@ */
1731 0, /* @tp_weaklistoffset@ */
1732 0, /* @tp_iter@ */
1733 0, /* @tp_iternext@ */
1734 PYMETHODS(gaeadaad), /* @tp_methods@ */
1735 0, /* @tp_members@ */
1736 PYGETSET(gaeadaad), /* @tp_getset@ */
1737 0, /* @tp_base@ */
1738 0, /* @tp_dict@ */
1739 0, /* @tp_descr_get@ */
1740 0, /* @tp_descr_set@ */
1741 0, /* @tp_dictoffset@ */
1742 0, /* @tp_init@ */
1743 PyType_GenericAlloc, /* @tp_alloc@ */
1744 abstract_pynew, /* @tp_new@ */
1745 0, /* @tp_free@ */
1746 0 /* @tp_is_gc@ */
1747 };
1748
1749 static PyTypeObject gcaeadenc_pytype_skel = {
1750 PyObject_HEAD_INIT(0) 0, /* Header */
1751 "GAEEncClass", /* @tp_name@ */
1752 sizeof(gcaeadenc_pyobj), /* @tp_basicsize@ */
1753 0, /* @tp_itemsize@ */
1754
1755 0, /* @tp_dealloc@ */
1756 0, /* @tp_print@ */
1757 0, /* @tp_getattr@ */
1758 0, /* @tp_setattr@ */
1759 0, /* @tp_compare@ */
1760 0, /* @tp_repr@ */
1761 0, /* @tp_as_number@ */
1762 0, /* @tp_as_sequence@ */
1763 0, /* @tp_as_mapping@ */
1764 0, /* @tp_hash@ */
1765 0, /* @tp_call@ */
1766 0, /* @tp_str@ */
1767 0, /* @tp_getattro@ */
1768 0, /* @tp_setattro@ */
1769 0, /* @tp_as_buffer@ */
1770 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1771 Py_TPFLAGS_BASETYPE,
1772
1773 /* @tp_doc@ */
1774 "Authenticated encryption operation metaclass.",
1775
1776 0, /* @tp_traverse@ */
1777 0, /* @tp_clear@ */
1778 0, /* @tp_richcompare@ */
1779 0, /* @tp_weaklistoffset@ */
1780 0, /* @tp_iter@ */
1781 0, /* @tp_iternext@ */
1782 0, /* @tp_methods@ */
1783 0, /* @tp_members@ */
1784 0, /* @tp_getset@ */
1785 0, /* @tp_base@ */
1786 0, /* @tp_dict@ */
1787 0, /* @tp_descr_get@ */
1788 0, /* @tp_descr_set@ */
1789 0, /* @tp_dictoffset@ */
1790 0, /* @tp_init@ */
1791 PyType_GenericAlloc, /* @tp_alloc@ */
1792 abstract_pynew, /* @tp_new@ */
1793 0, /* @tp_free@ */
1794 0 /* @tp_is_gc@ */
1795 };
1796
1797 static PyTypeObject gaeadenc_pytype_skel = {
1798 PyObject_HEAD_INIT(0) 0, /* Header */
1799 "GAEEnc", /* @tp_name@ */
1800 sizeof(gaeadenc_pyobj), /* @tp_basicsize@ */
1801 0, /* @tp_itemsize@ */
1802
1803 gaeadenc_pydealloc, /* @tp_dealloc@ */
1804 0, /* @tp_print@ */
1805 0, /* @tp_getattr@ */
1806 0, /* @tp_setattr@ */
1807 0, /* @tp_compare@ */
1808 0, /* @tp_repr@ */
1809 0, /* @tp_as_number@ */
1810 0, /* @tp_as_sequence@ */
1811 0, /* @tp_as_mapping@ */
1812 0, /* @tp_hash@ */
1813 0, /* @tp_call@ */
1814 0, /* @tp_str@ */
1815 0, /* @tp_getattro@ */
1816 0, /* @tp_setattro@ */
1817 0, /* @tp_as_buffer@ */
1818 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1819 Py_TPFLAGS_BASETYPE,
1820
1821 /* @tp_doc@ */
1822 "Authenticated encryption operation.",
1823
1824 0, /* @tp_traverse@ */
1825 0, /* @tp_clear@ */
1826 0, /* @tp_richcompare@ */
1827 0, /* @tp_weaklistoffset@ */
1828 0, /* @tp_iter@ */
1829 0, /* @tp_iternext@ */
1830 PYMETHODS(gaeadenc), /* @tp_methods@ */
1831 0, /* @tp_members@ */
1832 PYGETSET(gaeadenc), /* @tp_getset@ */
1833 0, /* @tp_base@ */
1834 0, /* @tp_dict@ */
1835 0, /* @tp_descr_get@ */
1836 0, /* @tp_descr_set@ */
1837 0, /* @tp_dictoffset@ */
1838 0, /* @tp_init@ */
1839 PyType_GenericAlloc, /* @tp_alloc@ */
1840 abstract_pynew, /* @tp_new@ */
1841 0, /* @tp_free@ */
1842 0 /* @tp_is_gc@ */
1843 };
1844
1845 static PyTypeObject gcaeaddec_pytype_skel = {
1846 PyObject_HEAD_INIT(0) 0, /* Header */
1847 "GAEDecClass", /* @tp_name@ */
1848 sizeof(gcaeaddec_pyobj), /* @tp_basicsize@ */
1849 0, /* @tp_itemsize@ */
1850
1851 0, /* @tp_dealloc@ */
1852 0, /* @tp_print@ */
1853 0, /* @tp_getattr@ */
1854 0, /* @tp_setattr@ */
1855 0, /* @tp_compare@ */
1856 0, /* @tp_repr@ */
1857 0, /* @tp_as_number@ */
1858 0, /* @tp_as_sequence@ */
1859 0, /* @tp_as_mapping@ */
1860 0, /* @tp_hash@ */
1861 0, /* @tp_call@ */
1862 0, /* @tp_str@ */
1863 0, /* @tp_getattro@ */
1864 0, /* @tp_setattro@ */
1865 0, /* @tp_as_buffer@ */
1866 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1867 Py_TPFLAGS_BASETYPE,
1868
1869 /* @tp_doc@ */
1870 "Authenticated decryption operation metaclass.",
1871
1872 0, /* @tp_traverse@ */
1873 0, /* @tp_clear@ */
1874 0, /* @tp_richcompare@ */
1875 0, /* @tp_weaklistoffset@ */
1876 0, /* @tp_iter@ */
1877 0, /* @tp_iternext@ */
1878 0, /* @tp_methods@ */
1879 0, /* @tp_members@ */
1880 0, /* @tp_getset@ */
1881 0, /* @tp_base@ */
1882 0, /* @tp_dict@ */
1883 0, /* @tp_descr_get@ */
1884 0, /* @tp_descr_set@ */
1885 0, /* @tp_dictoffset@ */
1886 0, /* @tp_init@ */
1887 PyType_GenericAlloc, /* @tp_alloc@ */
1888 abstract_pynew, /* @tp_new@ */
1889 0, /* @tp_free@ */
1890 0 /* @tp_is_gc@ */
1891 };
1892
1893 static PyTypeObject gaeaddec_pytype_skel = {
1894 PyObject_HEAD_INIT(0) 0, /* Header */
1895 "GAEDec", /* @tp_name@ */
1896 sizeof(gaeaddec_pyobj), /* @tp_basicsize@ */
1897 0, /* @tp_itemsize@ */
1898
1899 gaeaddec_pydealloc, /* @tp_dealloc@ */
1900 0, /* @tp_print@ */
1901 0, /* @tp_getattr@ */
1902 0, /* @tp_setattr@ */
1903 0, /* @tp_compare@ */
1904 0, /* @tp_repr@ */
1905 0, /* @tp_as_number@ */
1906 0, /* @tp_as_sequence@ */
1907 0, /* @tp_as_mapping@ */
1908 0, /* @tp_hash@ */
1909 0, /* @tp_call@ */
1910 0, /* @tp_str@ */
1911 0, /* @tp_getattro@ */
1912 0, /* @tp_setattro@ */
1913 0, /* @tp_as_buffer@ */
1914 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1915 Py_TPFLAGS_BASETYPE,
1916
1917 /* @tp_doc@ */
1918 "Authenticated decryption operation.",
1919
1920 0, /* @tp_traverse@ */
1921 0, /* @tp_clear@ */
1922 0, /* @tp_richcompare@ */
1923 0, /* @tp_weaklistoffset@ */
1924 0, /* @tp_iter@ */
1925 0, /* @tp_iternext@ */
1926 PYMETHODS(gaeaddec), /* @tp_methods@ */
1927 0, /* @tp_members@ */
1928 PYGETSET(gaeaddec), /* @tp_getset@ */
1929 0, /* @tp_base@ */
1930 0, /* @tp_dict@ */
1931 0, /* @tp_descr_get@ */
1932 0, /* @tp_descr_set@ */
1933 0, /* @tp_dictoffset@ */
1934 0, /* @tp_init@ */
1935 PyType_GenericAlloc, /* @tp_alloc@ */
1936 abstract_pynew, /* @tp_new@ */
1937 0, /* @tp_free@ */
1938 0 /* @tp_is_gc@ */
1939 };
1940
1941 /*----- Hash functions ----------------------------------------------------*/
1942
1943 PyTypeObject *gchash_pytype;
1944 static PyTypeObject *ghash_pytype;
1945 PyObject *sha_pyobj, *has160_pyobj;
1946
1947 typedef struct ghash_pyobj {
1948 PyObject_HEAD
1949 ghash *h;
1950 } ghash_pyobj;
1951
1952 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1953 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1954
1955 CONVFUNC(gchash, gchash *, GCHASH_CH)
1956 CONVFUNC(ghash, ghash *, GHASH_H)
1957
1958 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1959 {
1960 static const char *const kwlist[] = { 0 };
1961 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1962 goto end;
1963 return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1964 end:
1965 return (0);
1966 }
1967
1968 static PyObject *gchash_pywrap(gchash *ch)
1969 {
1970 gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1971 g->ch = ch;
1972 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1973 g->ty.ht_type.tp_base = ghash_pytype;
1974 Py_INCREF(ghash_pytype);
1975 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1976 Py_TPFLAGS_BASETYPE |
1977 Py_TPFLAGS_HEAPTYPE);
1978 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1979 g->ty.ht_type.tp_free = 0;
1980 g->ty.ht_type.tp_new = ghash_pynew;
1981 typeready(&g->ty.ht_type);
1982 return ((PyObject *)g);
1983 }
1984
1985 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1986 {
1987 ghash_pyobj *g;
1988 if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1989 else Py_INCREF(cobj);
1990 g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1991 g->h = h;
1992 return ((PyObject *)g);
1993 }
1994
1995 static void ghash_pydealloc(PyObject *me)
1996 {
1997 GH_DESTROY(GHASH_H(me));
1998 Py_DECREF(me->ob_type);
1999 FREEOBJ(me);
2000 }
2001
2002 static PyObject *gchget_name(PyObject *me, void *hunoz)
2003 { return (PyString_FromString(GCHASH_CH(me)->name)); }
2004
2005 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
2006 { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2007
2008 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2009 { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2010
2011 static PyObject *ghmeth_copy(PyObject *me)
2012 { return (ghash_pywrap((PyObject *)me->ob_type, GH_COPY(GHASH_H(me)))); }
2013
2014 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2015 {
2016 char *p;
2017 Py_ssize_t sz;
2018 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2019 GH_HASH(GHASH_H(me), p, sz);
2020 RETURN_ME;
2021 }
2022
2023 #define GHMETH_HASHU_(n, W, w) \
2024 static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg) \
2025 { \
2026 uint##n x; \
2027 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2028 GH_HASHU##W(GHASH_H(me), x); \
2029 RETURN_ME; \
2030 }
2031 DOUINTCONV(GHMETH_HASHU_)
2032
2033 #define GHMETH_HASHBUF_(n, W, w) \
2034 static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg) \
2035 { \
2036 char *p; \
2037 Py_ssize_t sz; \
2038 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2039 if (sz > MASK##n) TYERR("string too long"); \
2040 GH_HASHBUF##W(GHASH_H(me), p, sz); \
2041 RETURN_ME; \
2042 end: \
2043 return (0); \
2044 }
2045 DOUINTCONV(GHMETH_HASHBUF_)
2046
2047 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2048 {
2049 char *p;
2050 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2051 GH_HASHSTRZ(GHASH_H(me), p);
2052 RETURN_ME;
2053 }
2054
2055 static PyObject *ghmeth_done(PyObject *me)
2056 {
2057 ghash *g;
2058 PyObject *rc;
2059 g = GH_COPY(GHASH_H(me));
2060 rc = bytestring_pywrap(0, g->ops->c->hashsz);
2061 GH_DONE(g, PyString_AS_STRING(rc));
2062 GH_DESTROY(g);
2063 return (rc);
2064 }
2065
2066 static const PyGetSetDef gchash_pygetset[] = {
2067 #define GETSETNAME(op, name) gch##op##_##name
2068 GET (bufsz, "CH.bufsz -> hash buffer size, or zero")
2069 GET (hashsz, "CH.hashsz -> hash output size")
2070 GET (name, "CH.name -> name of this kind of hash")
2071 #undef GETSETNAME
2072 { 0 }
2073 };
2074
2075 static const PyMethodDef ghash_pymethods[] = {
2076 #define METHNAME(name) ghmeth_##name
2077 NAMETH(copy, "H.copy() -> HH")
2078 METH (hash, "H.hash(M)")
2079 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2080 DOUINTCONV(METHU_)
2081 #undef METHU_
2082 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2083 DOUINTCONV(METHBUF_)
2084 #undef METHBUF_
2085 METH (hashstrz, "H.hashstrz(STRING)")
2086 NAMETH(done, "H.done() -> HASH")
2087 #undef METHNAME
2088 { 0 }
2089 };
2090
2091 static PyTypeObject gchash_pytype_skel = {
2092 PyObject_HEAD_INIT(0) 0, /* Header */
2093 "GCHash", /* @tp_name@ */
2094 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2095 0, /* @tp_itemsize@ */
2096
2097 0, /* @tp_dealloc@ */
2098 0, /* @tp_print@ */
2099 0, /* @tp_getattr@ */
2100 0, /* @tp_setattr@ */
2101 0, /* @tp_compare@ */
2102 0, /* @tp_repr@ */
2103 0, /* @tp_as_number@ */
2104 0, /* @tp_as_sequence@ */
2105 0, /* @tp_as_mapping@ */
2106 0, /* @tp_hash@ */
2107 0, /* @tp_call@ */
2108 0, /* @tp_str@ */
2109 0, /* @tp_getattro@ */
2110 0, /* @tp_setattro@ */
2111 0, /* @tp_as_buffer@ */
2112 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2113 Py_TPFLAGS_BASETYPE,
2114
2115 /* @tp_doc@ */
2116 "Hash function metaclass.",
2117
2118 0, /* @tp_traverse@ */
2119 0, /* @tp_clear@ */
2120 0, /* @tp_richcompare@ */
2121 0, /* @tp_weaklistoffset@ */
2122 0, /* @tp_iter@ */
2123 0, /* @tp_iternext@ */
2124 0, /* @tp_methods@ */
2125 0, /* @tp_members@ */
2126 PYGETSET(gchash), /* @tp_getset@ */
2127 0, /* @tp_base@ */
2128 0, /* @tp_dict@ */
2129 0, /* @tp_descr_get@ */
2130 0, /* @tp_descr_set@ */
2131 0, /* @tp_dictoffset@ */
2132 0, /* @tp_init@ */
2133 PyType_GenericAlloc, /* @tp_alloc@ */
2134 abstract_pynew, /* @tp_new@ */
2135 0, /* @tp_free@ */
2136 0 /* @tp_is_gc@ */
2137 };
2138
2139 static PyTypeObject ghash_pytype_skel = {
2140 PyObject_HEAD_INIT(0) 0, /* Header */
2141 "GHash", /* @tp_name@ */
2142 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2143 0, /* @tp_itemsize@ */
2144
2145 ghash_pydealloc, /* @tp_dealloc@ */
2146 0, /* @tp_print@ */
2147 0, /* @tp_getattr@ */
2148 0, /* @tp_setattr@ */
2149 0, /* @tp_compare@ */
2150 0, /* @tp_repr@ */
2151 0, /* @tp_as_number@ */
2152 0, /* @tp_as_sequence@ */
2153 0, /* @tp_as_mapping@ */
2154 0, /* @tp_hash@ */
2155 0, /* @tp_call@ */
2156 0, /* @tp_str@ */
2157 0, /* @tp_getattro@ */
2158 0, /* @tp_setattro@ */
2159 0, /* @tp_as_buffer@ */
2160 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2161 Py_TPFLAGS_BASETYPE,
2162
2163 /* @tp_doc@ */
2164 "Hash function, abstract base class.",
2165
2166 0, /* @tp_traverse@ */
2167 0, /* @tp_clear@ */
2168 0, /* @tp_richcompare@ */
2169 0, /* @tp_weaklistoffset@ */
2170 0, /* @tp_iter@ */
2171 0, /* @tp_iternext@ */
2172 PYMETHODS(ghash), /* @tp_methods@ */
2173 0, /* @tp_members@ */
2174 0, /* @tp_getset@ */
2175 0, /* @tp_base@ */
2176 0, /* @tp_dict@ */
2177 0, /* @tp_descr_get@ */
2178 0, /* @tp_descr_set@ */
2179 0, /* @tp_dictoffset@ */
2180 0, /* @tp_init@ */
2181 PyType_GenericAlloc, /* @tp_alloc@ */
2182 abstract_pynew, /* @tp_new@ */
2183 0, /* @tp_free@ */
2184 0 /* @tp_is_gc@ */
2185 };
2186
2187 /*----- Message authentication --------------------------------------------*/
2188
2189 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2190
2191 typedef struct gcmac_pyobj {
2192 PyHeapTypeObject ty;
2193 gcmac *cm;
2194 } gcmac_pyobj;
2195
2196 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2197 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2198 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2199 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2200 static PyObject *gmac_pywrap(PyObject *, gmac *);
2201
2202 typedef struct gmac_pyobj {
2203 PyHeapTypeObject ty;
2204 gmac *m;
2205 } gmac_pyobj;
2206
2207 extern PyTypeObject *gmac_pytype;
2208 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2209 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2210 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2211 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2212 extern int convgmac(PyObject *, void *);
2213
2214 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2215 {
2216 static const char *const kwlist[] = { "k", 0 };
2217 char *k;
2218 Py_ssize_t sz;
2219
2220 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2221 goto end;
2222 if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
2223 return (gmac_pywrap((PyObject *)ty,
2224 GM_KEY(GCMAC_CM(ty), k, sz)));
2225 end:
2226 return (0);
2227 }
2228
2229 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2230 {
2231 static const char *const kwlist[] = { 0 };
2232 ghash_pyobj *g;
2233
2234 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2235 g = PyObject_NEW(ghash_pyobj, ty);
2236 g->h = GM_INIT(GMAC_M(ty));
2237 Py_INCREF(ty);
2238 return ((PyObject *)g);
2239 }
2240
2241 static PyObject *gcmac_pywrap(gcmac *cm)
2242 {
2243 gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2244 g->cm = cm;
2245 g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2246 g->ty.ht_type.tp_base = gmac_pytype;
2247 Py_INCREF(gmac_pytype);
2248 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2249 Py_TPFLAGS_BASETYPE |
2250 Py_TPFLAGS_HEAPTYPE);
2251 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2252 g->ty.ht_type.tp_free = 0;
2253 g->ty.ht_type.tp_new = gmac_pynew;
2254 typeready(&g->ty.ht_type);
2255 return ((PyObject *)g);
2256 }
2257
2258 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2259 {
2260 gmac_pyobj *g;
2261 if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2262 else Py_INCREF(cobj);
2263 g = newtype((PyTypeObject *)cobj, 0, 0);
2264 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2265 g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
2266 g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
2267 g->ty.ht_type.tp_base = gmhash_pytype;
2268 Py_INCREF(gmac_pytype);
2269 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2270 Py_TPFLAGS_BASETYPE |
2271 Py_TPFLAGS_HEAPTYPE);
2272 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2273 g->ty.ht_type.tp_free = 0;
2274 g->ty.ht_type.tp_new = gmhash_pynew;
2275 typeready(&g->ty.ht_type);
2276 g->m = m;
2277 return ((PyObject *)g);
2278 }
2279
2280 static void gmac_pydealloc(PyObject *me)
2281 {
2282 GM_DESTROY(GMAC_M(me));
2283 Py_DECREF(me->ob_type);
2284 PyType_Type.tp_dealloc(me);
2285 }
2286
2287 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2288 { return (PyString_FromString(GCMAC_CM(me)->name)); }
2289
2290 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2291 { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2292
2293 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2294 { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2295
2296 static const PyGetSetDef gcmac_pygetset[] = {
2297 #define GETSETNAME(op, name) gcm##op##_##name
2298 GET (keysz, "CM.keysz -> acceptable key sizes")
2299 GET (tagsz, "CM.tagsz -> MAC output size")
2300 GET (name, "CM.name -> name of this kind of MAC")
2301 #undef GETSETNAME
2302 { 0 }
2303 };
2304
2305 static PyTypeObject gcmac_pytype_skel = {
2306 PyObject_HEAD_INIT(0) 0, /* Header */
2307 "GCMAC", /* @tp_name@ */
2308 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2309 0, /* @tp_itemsize@ */
2310
2311 0, /* @tp_dealloc@ */
2312 0, /* @tp_print@ */
2313 0, /* @tp_getattr@ */
2314 0, /* @tp_setattr@ */
2315 0, /* @tp_compare@ */
2316 0, /* @tp_repr@ */
2317 0, /* @tp_as_number@ */
2318 0, /* @tp_as_sequence@ */
2319 0, /* @tp_as_mapping@ */
2320 0, /* @tp_hash@ */
2321 0, /* @tp_call@ */
2322 0, /* @tp_str@ */
2323 0, /* @tp_getattro@ */
2324 0, /* @tp_setattro@ */
2325 0, /* @tp_as_buffer@ */
2326 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2327 Py_TPFLAGS_BASETYPE,
2328
2329 /* @tp_doc@ */
2330 "Message authentication code metametaclass.",
2331
2332 0, /* @tp_traverse@ */
2333 0, /* @tp_clear@ */
2334 0, /* @tp_richcompare@ */
2335 0, /* @tp_weaklistoffset@ */
2336 0, /* @tp_iter@ */
2337 0, /* @tp_iternext@ */
2338 0, /* @tp_methods@ */
2339 0, /* @tp_members@ */
2340 PYGETSET(gcmac), /* @tp_getset@ */
2341 0, /* @tp_base@ */
2342 0, /* @tp_dict@ */
2343 0, /* @tp_descr_get@ */
2344 0, /* @tp_descr_set@ */
2345 0, /* @tp_dictoffset@ */
2346 0, /* @tp_init@ */
2347 PyType_GenericAlloc, /* @tp_alloc@ */
2348 abstract_pynew, /* @tp_new@ */
2349 0, /* @tp_free@ */
2350 0 /* @tp_is_gc@ */
2351 };
2352
2353 static PyTypeObject gmac_pytype_skel = {
2354 PyObject_HEAD_INIT(0) 0, /* Header */
2355 "GMAC", /* @tp_name@ */
2356 sizeof(gmac_pyobj), /* @tp_basicsize@ */
2357 0, /* @tp_itemsize@ */
2358
2359 gmac_pydealloc, /* @tp_dealloc@ */
2360 0, /* @tp_print@ */
2361 0, /* @tp_getattr@ */
2362 0, /* @tp_setattr@ */
2363 0, /* @tp_compare@ */
2364 0, /* @tp_repr@ */
2365 0, /* @tp_as_number@ */
2366 0, /* @tp_as_sequence@ */
2367 0, /* @tp_as_mapping@ */
2368 0, /* @tp_hash@ */
2369 0, /* @tp_call@ */
2370 0, /* @tp_str@ */
2371 0, /* @tp_getattro@ */
2372 0, /* @tp_setattro@ */
2373 0, /* @tp_as_buffer@ */
2374 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2375 Py_TPFLAGS_BASETYPE,
2376
2377 /* @tp_doc@ */
2378 "Message authentication code metaclass, abstract base class.",
2379
2380 0, /* @tp_traverse@ */
2381 0, /* @tp_clear@ */
2382 0, /* @tp_richcompare@ */
2383 0, /* @tp_weaklistoffset@ */
2384 0, /* @tp_iter@ */
2385 0, /* @tp_iternext@ */
2386 0, /* @tp_methods@ */
2387 0, /* @tp_members@ */
2388 0, /* @tp_getset@ */
2389 0, /* @tp_base@ */
2390 0, /* @tp_dict@ */
2391 0, /* @tp_descr_get@ */
2392 0, /* @tp_descr_set@ */
2393 0, /* @tp_dictoffset@ */
2394 0, /* @tp_init@ */
2395 PyType_GenericAlloc, /* @tp_alloc@ */
2396 abstract_pynew, /* @tp_new@ */
2397 0, /* @tp_free@ */
2398 0 /* @tp_is_gc@ */
2399 };
2400
2401 static PyTypeObject gmhash_pytype_skel = {
2402 PyObject_HEAD_INIT(0) 0, /* Header */
2403 "GMACHash", /* @tp_name@ */
2404 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2405 0, /* @tp_itemsize@ */
2406
2407 ghash_pydealloc, /* @tp_dealloc@ */
2408 0, /* @tp_print@ */
2409 0, /* @tp_getattr@ */
2410 0, /* @tp_setattr@ */
2411 0, /* @tp_compare@ */
2412 0, /* @tp_repr@ */
2413 0, /* @tp_as_number@ */
2414 0, /* @tp_as_sequence@ */
2415 0, /* @tp_as_mapping@ */
2416 0, /* @tp_hash@ */
2417 0, /* @tp_call@ */
2418 0, /* @tp_str@ */
2419 0, /* @tp_getattro@ */
2420 0, /* @tp_setattro@ */
2421 0, /* @tp_as_buffer@ */
2422 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2423 Py_TPFLAGS_BASETYPE,
2424
2425 /* @tp_doc@ */
2426 "Message authentication code, abstract base class.",
2427
2428 0, /* @tp_traverse@ */
2429 0, /* @tp_clear@ */
2430 0, /* @tp_richcompare@ */
2431 0, /* @tp_weaklistoffset@ */
2432 0, /* @tp_iter@ */
2433 0, /* @tp_iternext@ */
2434 0, /* @tp_methods@ */
2435 0, /* @tp_members@ */
2436 0, /* @tp_getset@ */
2437 0, /* @tp_base@ */
2438 0, /* @tp_dict@ */
2439 0, /* @tp_descr_get@ */
2440 0, /* @tp_descr_set@ */
2441 0, /* @tp_dictoffset@ */
2442 0, /* @tp_init@ */
2443 PyType_GenericAlloc, /* @tp_alloc@ */
2444 abstract_pynew, /* @tp_new@ */
2445 0, /* @tp_free@ */
2446 0 /* @tp_is_gc@ */
2447 };
2448
2449 /*----- Special snowflake for Poly1305 ------------------------------------*/
2450
2451 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2452
2453 typedef struct poly1305key_pyobj {
2454 PyHeapTypeObject ty;
2455 poly1305_key k;
2456 } poly1305key_pyobj;
2457
2458 typedef struct poly1305hash_pyobj {
2459 PyObject_HEAD
2460 unsigned f;
2461 #define f_mask 1u
2462 poly1305_ctx ctx;
2463 } poly1305hash_pyobj;
2464
2465 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2466 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2467 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2468
2469 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2470 PyObject *arg, PyObject *kw)
2471 {
2472 static const char *const kwlist[] = { "mask", 0 };
2473 poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2474 poly1305hash_pyobj *ph;
2475 char *m = 0;
2476 Py_ssize_t sz;
2477
2478 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#:new", KWLIST, &m, &sz))
2479 return (0);
2480 if (m && sz != POLY1305_MASKSZ) VALERR("bad mask length");
2481 ph = PyObject_NEW(poly1305hash_pyobj, ty);
2482 ph->f = 0;
2483 if (m) ph->f |= f_mask;
2484 poly1305_macinit(&ph->ctx, &pk->k, m);
2485 Py_INCREF(ty);
2486 return ((PyObject *)ph);
2487 end:
2488 return (0);
2489 }
2490
2491 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2492 PyObject *arg, PyObject *kw)
2493 {
2494 static const char *const kwlist[] = { "k", 0 };
2495 poly1305key_pyobj *pk;
2496 char *k;
2497 Py_ssize_t sz;
2498
2499 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2500 goto end;
2501 if (keysz(sz, poly1305_keysz) != sz) VALERR("bad key length");
2502
2503 pk = newtype(ty, 0, 0);
2504 pk->ty.ht_name = PyString_FromString("poly1305(keyed)");
2505 pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2506 pk->ty.ht_type.tp_name = PyString_AS_STRING(pk->ty.ht_name);
2507 pk->ty.ht_type.tp_base = poly1305hash_pytype;
2508 Py_INCREF(poly1305key_pytype);
2509 pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2510 Py_TPFLAGS_BASETYPE |
2511 Py_TPFLAGS_HEAPTYPE);
2512 pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2513 pk->ty.ht_type.tp_free = 0;
2514 pk->ty.ht_type.tp_new = poly1305hash_pynew;
2515 typeready(&pk->ty.ht_type);
2516
2517 poly1305_keyinit(&pk->k, k, sz);
2518 return ((PyObject *)pk);
2519
2520 end:
2521 return (0);
2522 }
2523
2524 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2525 { return (PyString_FromString("poly1305")); }
2526
2527 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2528 { return (keysz_pywrap(poly1305_keysz)); }
2529
2530 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2531 { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2532
2533 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2534 { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2535
2536 static PyObject *polymeth_copy(PyObject *me)
2537 {
2538 poly1305hash_pyobj *ph;
2539 ph = PyObject_NEW(poly1305hash_pyobj, me->ob_type);
2540 poly1305_copy(&ph->ctx, P1305_CTX(me));
2541 Py_INCREF(me->ob_type);
2542 return ((PyObject *)ph);
2543 }
2544
2545 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2546 {
2547 char *p;
2548 Py_ssize_t sz;
2549 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2550 poly1305_hash(P1305_CTX(me), p, sz);
2551 RETURN_ME;
2552 }
2553
2554 #define POLYMETH_HASHU_(n, W, w) \
2555 static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg) \
2556 { \
2557 uint##n x; \
2558 octet b[SZ_##W]; \
2559 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2560 STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2561 RETURN_ME; \
2562 }
2563 DOUINTCONV(POLYMETH_HASHU_)
2564
2565 #define POLYMETH_HASHBUF_(n, W, w) \
2566 static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg) \
2567 { \
2568 char *p; \
2569 Py_ssize_t sz; \
2570 octet b[SZ_##W]; \
2571 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2572 if (sz > MASK##n) TYERR("string too long"); \
2573 STORE##W(b, sz); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2574 poly1305_hash(P1305_CTX(me), p, sz); \
2575 RETURN_ME; \
2576 end: \
2577 return (0); \
2578 }
2579 DOUINTCONV(POLYMETH_HASHBUF_)
2580
2581 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2582 {
2583 char *p;
2584 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2585 poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2586 RETURN_ME;
2587 }
2588
2589 static PyObject *polymeth_flush(PyObject *me)
2590 { poly1305_flush(P1305_CTX(me)); RETURN_ME; }
2591
2592 static PyObject *polymeth_flushzero(PyObject *me)
2593 { poly1305_flushzero(P1305_CTX(me)); RETURN_ME; }
2594
2595 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2596 {
2597 PyObject *pre, *suff;
2598 if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2599 if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2600 !PyObject_TypeCheck(suff, poly1305hash_pytype))
2601 TYERR("wanted a poly1305hash");
2602 if (me->ob_type != pre->ob_type || me->ob_type != suff->ob_type)
2603 TYERR("key mismatch");
2604 if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2605 poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2606 RETURN_ME;
2607 end:
2608 return (0);
2609 }
2610
2611 static PyObject *polymeth_done(PyObject *me)
2612 {
2613 PyObject *rc;
2614 if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2615 rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2616 poly1305_done(P1305_CTX(me), PyString_AS_STRING(rc));
2617 return (rc);
2618 end:
2619 return (0);
2620 }
2621
2622 static const PyGetSetDef poly1305cls_pygetset[] = {
2623 #define GETSETNAME(op, name) poly1305cls##op##_##name
2624 GET (keysz, "PC.keysz -> acceptable key sizes")
2625 GET (masksz, "PC.masksz -> mask size")
2626 GET (tagsz, "PC.tagsz -> MAC output size")
2627 GET (name, "PC.name -> name of this kind of MAC")
2628 #undef GETSETNAME
2629 { 0 }
2630 };
2631
2632 static const PyMethodDef poly1305hash_pymethods[] = {
2633 #define METHNAME(name) polymeth_##name
2634 NAMETH(copy, "P.copy() -> PP")
2635 METH (hash, "P.hash(M)")
2636 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2637 DOUINTCONV(METHU_)
2638 #undef METHU_
2639 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2640 DOUINTCONV(METHBUF_)
2641 #undef METHBUF_
2642 METH (hashstrz, "P.hashstrz(STRING)")
2643 NAMETH(flush, "P.flush()")
2644 NAMETH(flushzero, "P.flushzero()")
2645 METH (concat, "P.concat(PREFIX, SUFFIX)")
2646 NAMETH(done, "P.done() -> TAG")
2647 #undef METHNAME
2648 { 0 }
2649 };
2650
2651 static PyTypeObject poly1305cls_pytype_skel = {
2652 PyObject_HEAD_INIT(0) 0, /* Header */
2653 "Poly1305Class", /* @tp_name@ */
2654 sizeof(PyHeapTypeObject), /* @tp_basicsize@ */
2655 0, /* @tp_itemsize@ */
2656
2657 0, /* @tp_dealloc@ */
2658 0, /* @tp_print@ */
2659 0, /* @tp_getattr@ */
2660 0, /* @tp_setattr@ */
2661 0, /* @tp_compare@ */
2662 0, /* @tp_repr@ */
2663 0, /* @tp_as_number@ */
2664 0, /* @tp_as_sequence@ */
2665 0, /* @tp_as_mapping@ */
2666 0, /* @tp_hash@ */
2667 0, /* @tp_call@ */
2668 0, /* @tp_str@ */
2669 0, /* @tp_getattro@ */
2670 0, /* @tp_setattro@ */
2671 0, /* @tp_as_buffer@ */
2672 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2673 Py_TPFLAGS_BASETYPE,
2674
2675 /* @tp_doc@ */
2676 "Poly1305 metametaclass. Best not to ask.",
2677
2678 0, /* @tp_traverse@ */
2679 0, /* @tp_clear@ */
2680 0, /* @tp_richcompare@ */
2681 0, /* @tp_weaklistoffset@ */
2682 0, /* @tp_iter@ */
2683 0, /* @tp_iternext@ */
2684 0, /* @tp_methods@ */
2685 0, /* @tp_members@ */
2686 PYGETSET(poly1305cls), /* @tp_getset@ */
2687 0, /* @tp_base@ */
2688 0, /* @tp_dict@ */
2689 0, /* @tp_descr_get@ */
2690 0, /* @tp_descr_set@ */
2691 0, /* @tp_dictoffset@ */
2692 0, /* @tp_init@ */
2693 PyType_GenericAlloc, /* @tp_alloc@ */
2694 abstract_pynew, /* @tp_new@ */
2695 0, /* @tp_free@ */
2696 0 /* @tp_is_gc@ */
2697 };
2698
2699 static PyTypeObject poly1305key_pytype_skel = {
2700 PyObject_HEAD_INIT(0) 0, /* Header */
2701 "poly1305", /* @tp_name@ */
2702 sizeof(poly1305key_pyobj), /* @tp_basicsize@ */
2703 0, /* @tp_itemsize@ */
2704
2705 0, /* @tp_dealloc@ */
2706 0, /* @tp_print@ */
2707 0, /* @tp_getattr@ */
2708 0, /* @tp_setattr@ */
2709 0, /* @tp_compare@ */
2710 0, /* @tp_repr@ */
2711 0, /* @tp_as_number@ */
2712 0, /* @tp_as_sequence@ */
2713 0, /* @tp_as_mapping@ */
2714 0, /* @tp_hash@ */
2715 0, /* @tp_call@ */
2716 0, /* @tp_str@ */
2717 0, /* @tp_getattro@ */
2718 0, /* @tp_setattro@ */
2719 0, /* @tp_as_buffer@ */
2720 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2721 Py_TPFLAGS_BASETYPE,
2722
2723 /* @tp_doc@ */
2724 "poly1305(K): Poly1305 key.",
2725
2726 0, /* @tp_traverse@ */
2727 0, /* @tp_clear@ */
2728 0, /* @tp_richcompare@ */
2729 0, /* @tp_weaklistoffset@ */
2730 0, /* @tp_iter@ */
2731 0, /* @tp_iternext@ */
2732 0, /* @tp_methods@ */
2733 0, /* @tp_members@ */
2734 0, /* @tp_getset@ */
2735 0, /* @tp_base@ */
2736 0, /* @tp_dict@ */
2737 0, /* @tp_descr_get@ */
2738 0, /* @tp_descr_set@ */
2739 0, /* @tp_dictoffset@ */
2740 0, /* @tp_init@ */
2741 PyType_GenericAlloc, /* @tp_alloc@ */
2742 poly1305key_pynew, /* @tp_new@ */
2743 0, /* @tp_free@ */
2744 0 /* @tp_is_gc@ */
2745 };
2746
2747 static PyTypeObject poly1305hash_pytype_skel = {
2748 PyObject_HEAD_INIT(0) 0, /* Header */
2749 "Poly1305Hash", /* @tp_name@ */
2750 sizeof(poly1305hash_pyobj), /* @tp_basicsize@ */
2751 0, /* @tp_itemsize@ */
2752
2753 0, /* @tp_dealloc@ */
2754 0, /* @tp_print@ */
2755 0, /* @tp_getattr@ */
2756 0, /* @tp_setattr@ */
2757 0, /* @tp_compare@ */
2758 0, /* @tp_repr@ */
2759 0, /* @tp_as_number@ */
2760 0, /* @tp_as_sequence@ */
2761 0, /* @tp_as_mapping@ */
2762 0, /* @tp_hash@ */
2763 0, /* @tp_call@ */
2764 0, /* @tp_str@ */
2765 0, /* @tp_getattro@ */
2766 0, /* @tp_setattro@ */
2767 0, /* @tp_as_buffer@ */
2768 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2769 Py_TPFLAGS_BASETYPE,
2770
2771 /* @tp_doc@ */
2772 "Poly1305 MAC context base class.",
2773
2774 0, /* @tp_traverse@ */
2775 0, /* @tp_clear@ */
2776 0, /* @tp_richcompare@ */
2777 0, /* @tp_weaklistoffset@ */
2778 0, /* @tp_iter@ */
2779 0, /* @tp_iternext@ */
2780 PYMETHODS(poly1305hash), /* @tp_methods@ */
2781 0, /* @tp_members@ */
2782 0, /* @tp_getset@ */
2783 0, /* @tp_base@ */
2784 0, /* @tp_dict@ */
2785 0, /* @tp_descr_get@ */
2786 0, /* @tp_descr_set@ */
2787 0, /* @tp_dictoffset@ */
2788 0, /* @tp_init@ */
2789 PyType_GenericAlloc, /* @tp_alloc@ */
2790 abstract_pynew, /* @tp_new@ */
2791 0, /* @tp_free@ */
2792 0 /* @tp_is_gc@ */
2793 };
2794
2795 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2796
2797 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance) \
2798 static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg) \
2799 { \
2800 dance##_ctx dance; \
2801 char *k, *n; \
2802 Py_ssize_t ksz, nsz; \
2803 PyObject *rc; \
2804 if (!PyArg_ParseTuple(arg, "s#s#:" #hdance "_prf", \
2805 &k, &ksz, &n, &nsz)) \
2806 goto end; \
2807 if (ksz != keysz(ksz, dance##_keysz)) VALERR("bad key length"); \
2808 if (nsz != HDANCE##_INSZ) VALERR("bad input length"); \
2809 rc = bytestring_pywrap(0, HSALSA20_OUTSZ); \
2810 dance##_init(&dance, k, ksz, 0); \
2811 hdance##_prf(&dance, n, PyString_AS_STRING(rc)); \
2812 return (rc); \
2813 end: \
2814 return (0); \
2815 }
2816
2817 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2818 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2819 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2820
2821 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2822 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2823 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2824
2825 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2826
2827 static PyTypeObject *kxvik_pytype;
2828
2829 typedef struct kxvik_pyobj {
2830 PyObject_HEAD
2831 keccak1600_state s;
2832 unsigned n;
2833 } kxvik_pyobj;
2834
2835 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2836 {
2837 unsigned n = 24;
2838 kxvik_pyobj *rc = 0;
2839 static const char *const kwlist[] = { "nround", 0 };
2840 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2841 convuint, &n))
2842 goto end;
2843 rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2844 rc->n = n;
2845 keccak1600_init(&rc->s);
2846 end:
2847 return ((PyObject *)rc);
2848 }
2849
2850 static PyObject *kxvikmeth_copy(PyObject *me)
2851 {
2852 kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2853 rc = (kxvik_pyobj *)k->ob_type->tp_alloc(k->ob_type, 0);
2854 rc->s = k->s; rc->n = k->n;
2855 return ((PyObject *)rc);
2856 }
2857
2858 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2859 {
2860 kxvik_pyobj *k = (kxvik_pyobj *)me;
2861 kludge64 t[25];
2862 const octet *q;
2863 octet buf[8];
2864 unsigned i;
2865 char *p; Py_ssize_t n;
2866
2867 if (!PyArg_ParseTuple(arg, "s#:mix", &p, &n)) goto end;
2868 if (n > 200) VALERR("out of range");
2869 q = (const octet *)p;
2870 i = 0;
2871 while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2872 if (n) {
2873 memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2874 LOAD64_L_(t[i], buf); i++;
2875 }
2876 keccak1600_mix(&k->s, t, i);
2877 RETURN_ME;
2878 end:
2879 return (0);
2880 }
2881
2882 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2883 {
2884 kxvik_pyobj *k = (kxvik_pyobj *)me;
2885 PyObject *rc = 0;
2886 kludge64 t[25];
2887 octet *q, buf[8];
2888 unsigned i;
2889 unsigned n;
2890
2891 if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2892 if (n > 200) VALERR("out of range");
2893 rc = bytestring_pywrap(0, n);
2894 q = (octet *)PyString_AS_STRING(rc);
2895 keccak1600_extract(&k->s, t, (n + 7)/8);
2896 i = 0;
2897 while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2898 if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2899 end:
2900 return (rc);
2901 }
2902
2903 static PyObject *kxvikmeth_step(PyObject *me)
2904 {
2905 kxvik_pyobj *k = (kxvik_pyobj *)me;
2906 keccak1600_p(&k->s, &k->s, k->n);
2907 RETURN_ME;
2908 }
2909
2910 static PyObject *kxvikget_nround(PyObject *me, void *hunoz)
2911 {
2912 kxvik_pyobj *k = (kxvik_pyobj *)me;
2913 return (PyInt_FromLong(k->n));
2914 }
2915
2916 static int kxvikset_nround(PyObject *me, PyObject *val, void *hunoz)
2917 {
2918 kxvik_pyobj *k = (kxvik_pyobj *)me;
2919 unsigned n;
2920 int rc = -1;
2921
2922 if (!val) NIERR("__del__");
2923 if (!convuint(val, &n)) goto end;
2924 k->n = n;
2925 rc = 0;
2926 end:
2927 return (rc);
2928 }
2929
2930 static const PyGetSetDef kxvik_pygetset[] = {
2931 #define GETSETNAME(op, name) kxvik##op##_##name
2932 GETSET(nround, "KECCAK.nround -> number of rounds")
2933 #undef GETSETNAME
2934 { 0 }
2935 };
2936
2937 static const PyMethodDef kxvik_pymethods[] = {
2938 #define METHNAME(func) kxvikmeth_##func
2939 NAMETH(copy, "KECCAK.copy() -> KECCAK'")
2940 METH (mix, "KECCAK.mix(DATA)")
2941 METH (extract, "KECCAK.extract(NOCTETS)")
2942 NAMETH(step, "KECCAK.step()")
2943 #undef METHNAME
2944 { 0 }
2945 };
2946
2947 static PyTypeObject kxvik_pytype_skel = {
2948 PyObject_HEAD_INIT(0) 0, /* Header */
2949 "Keccak1600", /* @tp_name@ */
2950 sizeof(kxvik_pyobj), /* @tp_basicsize@ */
2951 0, /* @tp_itemsize@ */
2952
2953 0, /* @tp_dealloc@ */
2954 0, /* @tp_print@ */
2955 0, /* @tp_getattr@ */
2956 0, /* @tp_setattr@ */
2957 0, /* @tp_compare@ */
2958 0, /* @tp_repr@ */
2959 0, /* @tp_as_number@ */
2960 0, /* @tp_as_sequence@ */
2961 0, /* @tp_as_mapping@ */
2962 0, /* @tp_hash@ */
2963 0, /* @tp_call@ */
2964 0, /* @tp_str@ */
2965 0, /* @tp_getattro@ */
2966 0, /* @tp_setattro@ */
2967 0, /* @tp_as_buffer@ */
2968 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2969 Py_TPFLAGS_BASETYPE,
2970
2971 /* @tp_doc@ */
2972 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2973
2974 0, /* @tp_traverse@ */
2975 0, /* @tp_clear@ */
2976 0, /* @tp_richcompare@ */
2977 0, /* @tp_weaklistoffset@ */
2978 0, /* @tp_iter@ */
2979 0, /* @tp_iternext@ */
2980 PYMETHODS(kxvik), /* @tp_methods@ */
2981 0, /* @tp_members@ */
2982 PYGETSET(kxvik), /* @tp_getset@ */
2983 0, /* @tp_base@ */
2984 0, /* @tp_dict@ */
2985 0, /* @tp_descr_get@ */
2986 0, /* @tp_descr_set@ */
2987 0, /* @tp_dictoffset@ */
2988 0, /* @tp_init@ */
2989 PyType_GenericAlloc, /* @tp_alloc@ */
2990 kxvik_pynew, /* @tp_new@ */
2991 0, /* @tp_free@ */
2992 0 /* @tp_is_gc@ */
2993 };
2994
2995 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2996
2997 typedef struct shake_pyobj {
2998 PyObject_HEAD
2999 int st;
3000 shake_ctx h;
3001 } shake_pyobj;
3002
3003 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
3004 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
3005
3006 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
3007 const void *, size_t,
3008 const void *, size_t),
3009 PyTypeObject *ty,
3010 PyObject *arg, PyObject *kw)
3011 {
3012 shake_pyobj *rc = 0;
3013 char *p = 0, *f = 0;
3014 Py_ssize_t psz = 0, fsz = 0;
3015 static const char *const kwlist[] = { "perso", "func", 0 };
3016
3017 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#s#:new", KWLIST,
3018 &p, &psz, &f, &fsz))
3019 goto end;
3020 rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3021 initfn(&rc->h, f, fsz, p, psz);
3022 rc->st = 0;
3023 end:
3024 return ((PyObject *)rc);
3025 }
3026
3027 static PyObject *shake128_pynew(PyTypeObject *ty,
3028 PyObject *arg, PyObject *kw)
3029 { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
3030
3031 static PyObject *shake256_pynew(PyTypeObject *ty,
3032 PyObject *arg, PyObject *kw)
3033 { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
3034
3035 static int shake_check(PyObject *me, int st)
3036 {
3037 if (SHAKE_ST(me) != st) VALERR("wrong state");
3038 return (0);
3039 end:
3040 return (-1);
3041 }
3042
3043 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3044 {
3045 char *p;
3046 Py_ssize_t sz;
3047 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
3048 if (shake_check(me, 0)) return (0);
3049 shake_hash(SHAKE_H(me), p, sz);
3050 RETURN_ME;
3051 }
3052
3053 #define SHAKEMETH_HASHU_(n, W, w) \
3054 static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg) \
3055 { \
3056 uint##n x; \
3057 octet b[SZ_##W]; \
3058 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3059 if (shake_check(me, 0)) return (0); \
3060 STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3061 RETURN_ME; \
3062 }
3063 DOUINTCONV(SHAKEMETH_HASHU_)
3064
3065 #define SHAKEMETH_HASHBUF_(n, W, w) \
3066 static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg) \
3067 { \
3068 char *p; \
3069 Py_ssize_t sz; \
3070 octet b[SZ_##W]; \
3071 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
3072 if (sz > MASK##n) TYERR("string too long"); \
3073 if (shake_check(me, 0)) goto end; \
3074 STORE##W(b, sz); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3075 shake_hash(SHAKE_H(me), p, sz); \
3076 RETURN_ME; \
3077 end: \
3078 return (0); \
3079 }
3080 DOUINTCONV(SHAKEMETH_HASHBUF_)
3081
3082 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3083 {
3084 char *p;
3085 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3086 if (shake_check(me, 0)) return (0);
3087 shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3088 RETURN_ME;
3089 }
3090
3091 static PyObject *shakemeth_xof(PyObject *me)
3092 {
3093 if (shake_check(me, 0)) goto end;
3094 shake_xof(SHAKE_H(me));
3095 SHAKE_ST(me) = 1;
3096 RETURN_ME;
3097 end:
3098 return (0);
3099 }
3100
3101 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
3102 {
3103 PyObject *rc = 0;
3104 size_t n;
3105 if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
3106 if (shake_check(me, 0)) goto end;
3107 rc = bytestring_pywrap(0, n);
3108 shake_done(SHAKE_H(me), PyString_AS_STRING(rc), n);
3109 SHAKE_ST(me) = -1;
3110 end:
3111 return (rc);
3112 }
3113
3114 static PyObject *shakemeth_copy(PyObject *me)
3115 {
3116 shake_pyobj *rc = 0;
3117
3118 rc = PyObject_NEW(shake_pyobj, me->ob_type);
3119 rc->h = *SHAKE_H(me);
3120 rc->st = SHAKE_ST(me);
3121 return ((PyObject *)rc);
3122 }
3123
3124 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3125 {
3126 PyObject *rc = 0;
3127 size_t sz;
3128
3129 if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3130 if (shake_check(me, 1)) goto end;
3131 rc = bytestring_pywrap(0, sz);
3132 shake_get(SHAKE_H(me), PyString_AS_STRING(rc), sz);
3133 end:
3134 return (rc);
3135 }
3136
3137 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3138 {
3139 PyObject *rc = 0;
3140 char *p; Py_ssize_t sz;
3141
3142 if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) goto end;
3143 if (shake_check(me, 1)) goto end;
3144 rc = bytestring_pywrap(0, sz);
3145 shake_mask(SHAKE_H(me), p, PyString_AS_STRING(rc), sz);
3146 end:
3147 return (rc);
3148 }
3149
3150 static PyObject *shakeget_rate(PyObject *me, void *hunoz)
3151 { return (PyInt_FromLong(SHAKE_H(me)->h.r)); }
3152
3153 static PyObject *shakeget_buffered(PyObject *me, void *hunoz)
3154 { return (PyInt_FromLong(SHAKE_H(me)->h.n)); }
3155
3156 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3157 {
3158 int st = SHAKE_ST(me);
3159 return (PyString_FromString(st == 0 ? "absorb" :
3160 st == 1 ? "squeeze" : "dead"));
3161 }
3162
3163 static const PyGetSetDef shake_pygetset[] = {
3164 #define GETSETNAME(op, name) shake##op##_##name
3165 GET (rate, "S.rate -> rate, in bytes")
3166 GET (buffered, "S.buffered -> amount currently buffered")
3167 GET (state, "S.state -> `absorb', `squeeze', `dead'")
3168 #undef GETSETNAME
3169 { 0 }
3170 };
3171
3172 static const PyMethodDef shake_pymethods[] = {
3173 #define METHNAME(func) shakemeth_##func
3174 NAMETH(copy, "S.copy() -> SS")
3175 METH (hash, "S.hash(M)")
3176 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3177 DOUINTCONV(METHU_)
3178 #undef METHU_
3179 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3180 DOUINTCONV(METHBUF_)
3181 #undef METHBUF_
3182 METH (hashstrz, "S.hashstrz(STRING)")
3183 NAMETH(xof, "S.xof()")
3184 METH (done, "S.done(LEN) -> H")
3185 METH (get, "S.get(LEN) -> H")
3186 METH (mask, "S.mask(M) -> C")
3187 #undef METHNAME
3188 { 0 }
3189 };
3190
3191 static PyTypeObject shake_pytype_skel = {
3192 PyObject_HEAD_INIT(0) 0, /* Header */
3193 "Shake", /* @tp_name@ */
3194 sizeof(shake_pyobj), /* @tp_basicsize@ */
3195 0, /* @tp_itemsize@ */
3196
3197 0, /* @tp_dealloc@ */
3198 0, /* @tp_print@ */
3199 0, /* @tp_getattr@ */
3200 0, /* @tp_setattr@ */
3201 0, /* @tp_compare@ */
3202 0, /* @tp_repr@ */
3203 0, /* @tp_as_number@ */
3204 0, /* @tp_as_sequence@ */
3205 0, /* @tp_as_mapping@ */
3206 0, /* @tp_hash@ */
3207 0, /* @tp_call@ */
3208 0, /* @tp_str@ */
3209 0, /* @tp_getattro@ */
3210 0, /* @tp_setattro@ */
3211 0, /* @tp_as_buffer@ */
3212 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3213 Py_TPFLAGS_BASETYPE,
3214
3215 /* @tp_doc@ */
3216 "SHAKE/cSHAKE/KMAC base class.",
3217
3218 0, /* @tp_traverse@ */
3219 0, /* @tp_clear@ */
3220 0, /* @tp_richcompare@ */
3221 0, /* @tp_weaklistoffset@ */
3222 0, /* @tp_iter@ */
3223 0, /* @tp_iternext@ */
3224 PYMETHODS(shake), /* @tp_methods@ */
3225 0, /* @tp_members@ */
3226 PYGETSET(shake), /* @tp_getset@ */
3227 0, /* @tp_base@ */
3228 0, /* @tp_dict@ */
3229 0, /* @tp_descr_get@ */
3230 0, /* @tp_descr_set@ */
3231 0, /* @tp_dictoffset@ */
3232 0, /* @tp_init@ */
3233 PyType_GenericAlloc, /* @tp_alloc@ */
3234 abstract_pynew, /* @tp_new@ */
3235 0, /* @tp_free@ */
3236 0 /* @tp_is_gc@ */
3237 };
3238
3239 static PyTypeObject shake128_pytype_skel = {
3240 PyObject_HEAD_INIT(0) 0, /* Header */
3241 "Shake128", /* @tp_name@ */
3242 0, /* @tp_basicsize@ */
3243 0, /* @tp_itemsize@ */
3244
3245 0, /* @tp_dealloc@ */
3246 0, /* @tp_print@ */
3247 0, /* @tp_getattr@ */
3248 0, /* @tp_setattr@ */
3249 0, /* @tp_compare@ */
3250 0, /* @tp_repr@ */
3251 0, /* @tp_as_number@ */
3252 0, /* @tp_as_sequence@ */
3253 0, /* @tp_as_mapping@ */
3254 0, /* @tp_hash@ */
3255 0, /* @tp_call@ */
3256 0, /* @tp_str@ */
3257 0, /* @tp_getattro@ */
3258 0, /* @tp_setattro@ */
3259 0, /* @tp_as_buffer@ */
3260 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3261 Py_TPFLAGS_BASETYPE,
3262
3263 /* @tp_doc@ */
3264 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3265
3266 0, /* @tp_traverse@ */
3267 0, /* @tp_clear@ */
3268 0, /* @tp_richcompare@ */
3269 0, /* @tp_weaklistoffset@ */
3270 0, /* @tp_iter@ */
3271 0, /* @tp_iternext@ */
3272 0, /* @tp_methods@ */
3273 0, /* @tp_members@ */
3274 0, /* @tp_getset@ */
3275 0, /* @tp_base@ */
3276 0, /* @tp_dict@ */
3277 0, /* @tp_descr_get@ */
3278 0, /* @tp_descr_set@ */
3279 0, /* @tp_dictoffset@ */
3280 0, /* @tp_init@ */
3281 PyType_GenericAlloc, /* @tp_alloc@ */
3282 shake128_pynew, /* @tp_new@ */
3283 0, /* @tp_free@ */
3284 0 /* @tp_is_gc@ */
3285 };
3286
3287 static PyTypeObject shake256_pytype_skel = {
3288 PyObject_HEAD_INIT(0) 0, /* Header */
3289 "Shake256", /* @tp_name@ */
3290 0, /* @tp_basicsize@ */
3291 0, /* @tp_itemsize@ */
3292
3293 0, /* @tp_dealloc@ */
3294 0, /* @tp_print@ */
3295 0, /* @tp_getattr@ */
3296 0, /* @tp_setattr@ */
3297 0, /* @tp_compare@ */
3298 0, /* @tp_repr@ */
3299 0, /* @tp_as_number@ */
3300 0, /* @tp_as_sequence@ */
3301 0, /* @tp_as_mapping@ */
3302 0, /* @tp_hash@ */
3303 0, /* @tp_call@ */
3304 0, /* @tp_str@ */
3305 0, /* @tp_getattro@ */
3306 0, /* @tp_setattro@ */
3307 0, /* @tp_as_buffer@ */
3308 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3309 Py_TPFLAGS_BASETYPE,
3310
3311 /* @tp_doc@ */
3312 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3313
3314 0, /* @tp_traverse@ */
3315 0, /* @tp_clear@ */
3316 0, /* @tp_richcompare@ */
3317 0, /* @tp_weaklistoffset@ */
3318 0, /* @tp_iter@ */
3319 0, /* @tp_iternext@ */
3320 0, /* @tp_methods@ */
3321 0, /* @tp_members@ */
3322 0, /* @tp_getset@ */
3323 0, /* @tp_base@ */
3324 0, /* @tp_dict@ */
3325 0, /* @tp_descr_get@ */
3326 0, /* @tp_descr_set@ */
3327 0, /* @tp_dictoffset@ */
3328 0, /* @tp_init@ */
3329 PyType_GenericAlloc, /* @tp_alloc@ */
3330 shake256_pynew, /* @tp_new@ */
3331 0, /* @tp_free@ */
3332 0 /* @tp_is_gc@ */
3333 };
3334
3335 /*----- Pseudorandom permutations -----------------------------------------*/
3336
3337 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3338
3339 typedef struct prpinfo {
3340 const char *name;
3341 const octet *keysz;
3342 size_t ctxsz;
3343 size_t blksz;
3344 void (*init)(void *, const void *, size_t);
3345 void (*eblk)(void *, const void *, void *);
3346 void (*dblk)(void *, const void *, void *);
3347 } prpinfo;
3348
3349 #define PRP_DEF(PRE, pre) \
3350 static void pre##_prpinit(void *ctx, const void *k, size_t ksz) \
3351 { pre##_init(ctx, k, ksz); } \
3352 static void pre##_prpeblk(void *ctx, const void *in, void *out) \
3353 { \
3354 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3355 pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3356 } \
3357 static void pre##_prpdblk(void *ctx, const void *in, void *out) \
3358 { \
3359 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3360 pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3361 } \
3362 static const prpinfo pre##_prpinfo = { \
3363 #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ, \
3364 pre##_prpinit, pre##_prpeblk, pre##_prpdblk \
3365 };
3366 PRPS(PRP_DEF)
3367
3368 static const struct prpinfo *const gprptab[] = {
3369 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3370 PRPS(PRP_ENTRY)
3371 0
3372 };
3373
3374 typedef struct gcprp_pyobj {
3375 PyHeapTypeObject ty;
3376 const prpinfo *prp;
3377 } gcprp_pyobj;
3378 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3379
3380 typedef struct gprp_pyobj {
3381 PyObject_HEAD
3382 const prpinfo *prp;
3383 } gprp_pyobj;
3384 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3385 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3386
3387 typedef struct prp {
3388 const prpinfo *prp;
3389 void *ctx;
3390 } prp;
3391
3392 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3393 {
3394 static const char *const kwlist[] = { "key", 0 };
3395 char *k;
3396 Py_ssize_t sz;
3397 const prpinfo *prp = GCPRP_PRP(ty);
3398 PyObject *me;
3399
3400 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
3401 goto end;
3402 if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
3403 me = (PyObject *)ty->tp_alloc(ty, 0);
3404 GPRP_PRP(me) = prp;
3405 prp->init(GPRP_CTX(me), k, sz);
3406 Py_INCREF(me);
3407 return (me);
3408 end:
3409 return (0);
3410 }
3411
3412 static void gprp_pydealloc(PyObject *me)
3413 { Py_DECREF(me->ob_type); FREEOBJ(me); }
3414
3415 static PyObject *gcprp_pywrap(const prpinfo *prp)
3416 {
3417 gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3418 g->prp = prp;
3419 g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3420 g->ty.ht_type.tp_base = gprp_pytype;
3421 Py_INCREF(gprp_pytype);
3422 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3423 Py_TPFLAGS_BASETYPE |
3424 Py_TPFLAGS_HEAPTYPE);
3425 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3426 g->ty.ht_type.tp_free = 0;
3427 g->ty.ht_type.tp_new = gprp_pynew;
3428 typeready(&g->ty.ht_type);
3429 return ((PyObject *)g);
3430 }
3431
3432 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3433 { return (PyString_FromString(GCPRP_PRP(me)->name)); }
3434 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3435 { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3436 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3437 { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3438
3439 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3440 {
3441 char *p;
3442 Py_ssize_t n;
3443 PyObject *rc = 0;
3444
3445 if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
3446 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3447 rc = bytestring_pywrap(0, n);
3448 GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3449 end:
3450 return (rc);
3451 }
3452
3453 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3454 {
3455 char *p;
3456 Py_ssize_t n;
3457 PyObject *rc = 0;
3458
3459 if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
3460 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3461 rc = bytestring_pywrap(0, n);
3462 GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3463 end:
3464 return (rc);
3465 }
3466
3467 static const PyGetSetDef gcprp_pygetset[] = {
3468 #define GETSETNAME(op, name) gcp##op##_##name
3469 GET (keysz, "CP.keysz -> acceptable key sizes")
3470 GET (blksz, "CP.blksz -> block size")
3471 GET (name, "CP.name -> name of this kind of PRP")
3472 #undef GETSETNAME
3473 { 0 }
3474 };
3475
3476 static const PyMethodDef gprp_pymethods[] = {
3477 #define METHNAME(name) gpmeth_##name
3478 METH (encrypt, "P.encrypt(PT) -> CT")
3479 METH (decrypt, "P.decrypt(CT) -> PT")
3480 #undef METHNAME
3481 { 0 }
3482 };
3483
3484 static PyTypeObject gcprp_pytype_skel = {
3485 PyObject_HEAD_INIT(0) 0, /* Header */
3486 "GCPRP", /* @tp_name@ */
3487 sizeof(gcprp_pyobj), /* @tp_basicsize@ */
3488 0, /* @tp_itemsize@ */
3489
3490 0, /* @tp_dealloc@ */
3491 0, /* @tp_print@ */
3492 0, /* @tp_getattr@ */
3493 0, /* @tp_setattr@ */
3494 0, /* @tp_compare@ */
3495 0, /* @tp_repr@ */
3496 0, /* @tp_as_number@ */
3497 0, /* @tp_as_sequence@ */
3498 0, /* @tp_as_mapping@ */
3499 0, /* @tp_hash@ */
3500 0, /* @tp_call@ */
3501 0, /* @tp_str@ */
3502 0, /* @tp_getattro@ */
3503 0, /* @tp_setattro@ */
3504 0, /* @tp_as_buffer@ */
3505 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3506 Py_TPFLAGS_BASETYPE,
3507
3508 /* @tp_doc@ */
3509 "Pseudorandom permutation metaclass.",
3510
3511 0, /* @tp_traverse@ */
3512 0, /* @tp_clear@ */
3513 0, /* @tp_richcompare@ */
3514 0, /* @tp_weaklistoffset@ */
3515 0, /* @tp_iter@ */
3516 0, /* @tp_iternext@ */
3517 0, /* @tp_methods@ */
3518 0, /* @tp_members@ */
3519 PYGETSET(gcprp), /* @tp_getset@ */
3520 0, /* @tp_base@ */
3521 0, /* @tp_dict@ */
3522 0, /* @tp_descr_get@ */
3523 0, /* @tp_descr_set@ */
3524 0, /* @tp_dictoffset@ */
3525 0, /* @tp_init@ */
3526 PyType_GenericAlloc, /* @tp_alloc@ */
3527 abstract_pynew, /* @tp_new@ */
3528 0, /* @tp_free@ */
3529 0 /* @tp_is_gc@ */
3530 };
3531
3532 static PyTypeObject gprp_pytype_skel = {
3533 PyObject_HEAD_INIT(0) 0, /* Header */
3534 "GPRP", /* @tp_name@ */
3535 sizeof(gprp_pyobj), /* @tp_basicsize@ */
3536 0, /* @tp_itemsize@ */
3537
3538 gprp_pydealloc, /* @tp_dealloc@ */
3539 0, /* @tp_print@ */
3540 0, /* @tp_getattr@ */
3541 0, /* @tp_setattr@ */
3542 0, /* @tp_compare@ */
3543 0, /* @tp_repr@ */
3544 0, /* @tp_as_number@ */
3545 0, /* @tp_as_sequence@ */
3546 0, /* @tp_as_mapping@ */
3547 0, /* @tp_hash@ */
3548 0, /* @tp_call@ */
3549 0, /* @tp_str@ */
3550 0, /* @tp_getattro@ */
3551 0, /* @tp_setattro@ */
3552 0, /* @tp_as_buffer@ */
3553 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3554 Py_TPFLAGS_BASETYPE,
3555
3556 /* @tp_doc@ */
3557 "Pseudorandom permutation, abstract base class.",
3558
3559 0, /* @tp_traverse@ */
3560 0, /* @tp_clear@ */
3561 0, /* @tp_richcompare@ */
3562 0, /* @tp_weaklistoffset@ */
3563 0, /* @tp_iter@ */
3564 0, /* @tp_iternext@ */
3565 PYMETHODS(gprp), /* @tp_methods@ */
3566 0, /* @tp_members@ */
3567 0, /* @tp_getset@ */
3568 0, /* @tp_base@ */
3569 0, /* @tp_dict@ */
3570 0, /* @tp_descr_get@ */
3571 0, /* @tp_descr_set@ */
3572 0, /* @tp_dictoffset@ */
3573 0, /* @tp_init@ */
3574 PyType_GenericAlloc, /* @tp_alloc@ */
3575 abstract_pynew, /* @tp_new@ */
3576 0, /* @tp_free@ */
3577 0 /* @tp_is_gc@ */
3578 };
3579
3580 /*----- Main code ---------------------------------------------------------*/
3581
3582 static const PyMethodDef methods[] = {
3583 #define METHNAME(func) meth_##func
3584 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, \
3585 "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3586 METH_HDANCE(hsalsa20, "HSalsa20")
3587 METH_HDANCE(hsalsa2012, "HSalsa20/12")
3588 METH_HDANCE(hsalsa208, "HSalsa20/8")
3589 METH_HDANCE(hchacha20, "HChaCha20")
3590 METH_HDANCE(hchacha12, "HChaCha12")
3591 METH_HDANCE(hchacha8, "HChaCha8")
3592 #undef METH_DANCE
3593 #undef METHNAME
3594 { 0 }
3595 };
3596
3597 void algorithms_pyinit(void)
3598 {
3599 INITTYPE(keysz, root);
3600 INITTYPE(keyszany, keysz);
3601 INITTYPE(keyszrange, keysz);
3602 INITTYPE(keyszset, keysz);
3603 INITTYPE(gccipher, type);
3604 INITTYPE(gcipher, root);
3605 INITTYPE(gcaead, type);
3606 INITTYPE(gaeadkey, root);
3607 INITTYPE(gcaeadaad, type);
3608 INITTYPE(gaeadaad, root);
3609 INITTYPE(gcaeadenc, type);
3610 INITTYPE(gaeadenc, root);
3611 INITTYPE(gcaeaddec, type);
3612 INITTYPE(gaeaddec, root);
3613 INITTYPE(gchash, type);
3614 INITTYPE(ghash, root);
3615 INITTYPE(gcmac, type);
3616 INITTYPE(gmac, type);
3617 INITTYPE(gmhash, ghash);
3618 INITTYPE(poly1305cls, type);
3619 INITTYPE_META(poly1305key, type, poly1305cls);
3620 INITTYPE(poly1305hash, root);
3621 INITTYPE(kxvik, root);
3622 INITTYPE(shake, root);
3623 INITTYPE(shake128, shake);
3624 INITTYPE(shake256, shake);
3625 INITTYPE(gcprp, type);
3626 INITTYPE(gprp, root);
3627 addmethods(methods);
3628 }
3629
3630 GEN(gcciphers, cipher)
3631 GEN(gcaeads, aead)
3632 GEN(gchashes, hash)
3633 GEN(gcmacs, mac)
3634 #define gcprp prpinfo
3635 GEN(gcprps, prp)
3636
3637 void algorithms_pyinsert(PyObject *mod)
3638 {
3639 PyObject *d;
3640 INSERT("KeySZ", keysz_pytype);
3641 INSERT("KeySZAny", keyszany_pytype);
3642 INSERT("KeySZRange", keyszrange_pytype);
3643 INSERT("KeySZSet", keyszset_pytype);
3644 INSERT("GCCipher", gccipher_pytype);
3645 INSERT("GCipher", gcipher_pytype);
3646 INSERT("gcciphers", gcciphers());
3647 INSERT("GCAEAD", gcaead_pytype);
3648 INSERT("GAEKey", gaeadkey_pytype);
3649 INSERT("GAEAADClass", gcaeadaad_pytype);
3650 INSERT("GAEAAD", gaeadaad_pytype);
3651 INSERT("GAEEncClass", gcaeadenc_pytype);
3652 INSERT("GAEEnc", gaeadenc_pytype);
3653 INSERT("GAEDecClass", gcaeaddec_pytype);
3654 INSERT("GAEDec", gaeaddec_pytype);
3655 INSERT("gcaeads", gcaeads());
3656 INSERT("GCHash", gchash_pytype);
3657 INSERT("GHash", ghash_pytype);
3658 INSERT("gchashes", d = gchashes());
3659 sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3660 has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3661 INSERT("GCMAC", gcmac_pytype);
3662 INSERT("GMAC", gmac_pytype);
3663 INSERT("GMACHash", gmhash_pytype);
3664 INSERT("gcmacs", gcmacs());
3665 INSERT("Poly1305Class", poly1305cls_pytype);
3666 INSERT("poly1305", poly1305key_pytype);
3667 INSERT("Poly1305Hash", poly1305hash_pytype);
3668 INSERT("Keccak1600", kxvik_pytype);
3669 INSERT("Shake", shake_pytype);
3670 INSERT("Shake128", shake128_pytype);
3671 INSERT("Shake256", shake256_pytype);
3672 INSERT("GCPRP", gcprp_pytype);
3673 INSERT("GPRP", gprp_pytype);
3674 INSERT("gcprps", gcprps());
3675 }
3676
3677 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings