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algorithms.c: Fix longstanding ugly hack with new `MEMRNM' macro.
[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 MEMRNM(default, T_INT, dfl, READONLY, "KSZ.default -> default key size")
219 #undef MEMBERSTRUCT
220 { 0 }
221 };
222
223 #define KSZCONVOP(op) \
224 static PyObject *kszmeth_##op(PyObject *me, PyObject *arg) \
225 { \
226 double x, y; \
227 if (!PyArg_ParseTuple(arg, "d:" #op, &x)) return (0); \
228 y = keysz_##op(x); \
229 return (PyFloat_FromDouble(y)); \
230 }
231 KSZCONVOP(fromdl)
232 KSZCONVOP(fromschnorr)
233 KSZCONVOP(fromif)
234 KSZCONVOP(fromec)
235 KSZCONVOP(todl)
236 KSZCONVOP(toschnorr)
237 KSZCONVOP(toif)
238 KSZCONVOP(toec)
239 #undef KSZCONVOP
240
241 static const PyMethodDef keysz_pymethods[] = {
242 #define METHNAME(name) kszmeth_##name
243 SMTH (fromdl, "fromdl(N) -> M: "
244 "convert integer discrete log field size to work factor")
245 SMTH (fromschnorr, "fromschnorr(N) -> M: "
246 "convert Schnorr group order to work factor")
247 SMTH (fromif, "fromif(N) -> M: "
248 "convert integer factorization problem size to work factor")
249 SMTH (fromec, "fromec(N) -> M: "
250 "convert elliptic curve group order to work factor")
251 SMTH (todl, "todl(N) -> M: "
252 "convert work factor to integer discrete log field size")
253 SMTH (toschnorr, "toschnorr(N) -> M: "
254 "convert work factor to Schnorr group order")
255 SMTH (toif, "toif(N) -> M: "
256 "convert work factor to integer factorization problem size")
257 SMTH (toec, "toec(N) -> M: "
258 "convert work factor to elliptic curve group order")
259 SMTH (toec, "toec(N) -> M: "
260 "convert work factor to elliptic curve group order")
261 #undef METHNAME
262 { 0 }
263 };
264
265 static const PyGetSetDef keyszany_pygetset[] = {
266 #define GETSETNAME(op, name) ka##op##_##name
267 GET (min, "KSZ.min -> smallest allowed key size")
268 GET (max, "KSZ.max -> largest allowed key size")
269 #undef GETSETNAME
270 { 0 }
271 };
272
273 static const PyMemberDef keyszrange_pymembers[] = {
274 #define MEMBERSTRUCT keyszrange_pyobj
275 MEMBER(min, T_INT, READONLY, "KSZ.min -> smallest allowed key size")
276 MEMBER(max, T_INT, READONLY, "KSZ.max -> largest allowed key size")
277 MEMBER(mod, T_INT, READONLY,
278 "KSZ.mod -> key size must be a multiple of this")
279 #undef MEMBERSTRUCT
280 { 0 }
281 };
282
283 static const PyGetSetDef keyszset_pygetset[] = {
284 #define GETSETNAME(op, name) ks##op##_##name
285 GET (min, "KSZ.min -> smallest allowed key size")
286 GET (max, "KSZ.max -> largest allowed key size")
287 #undef GETSETNAME
288 { 0 }
289 };
290
291 static const PyMemberDef keyszset_pymembers[] = {
292 #define MEMBERSTRUCT keyszset_pyobj
293 MEMBER(set, T_OBJECT, READONLY, "KSZ.set -> allowed key sizes")
294 #undef MEMBERSTRUCT
295 { 0 }
296 };
297
298 static PyTypeObject keysz_pytype_skel = {
299 PyObject_HEAD_INIT(0) 0, /* Header */
300 "KeySZ", /* @tp_name@ */
301 sizeof(keysz_pyobj), /* @tp_basicsize@ */
302 0, /* @tp_itemsize@ */
303
304 0, /* @tp_dealloc@ */
305 0, /* @tp_print@ */
306 0, /* @tp_getattr@ */
307 0, /* @tp_setattr@ */
308 0, /* @tp_compare@ */
309 0, /* @tp_repr@ */
310 0, /* @tp_as_number@ */
311 0, /* @tp_as_sequence@ */
312 0, /* @tp_as_mapping@ */
313 0, /* @tp_hash@ */
314 0, /* @tp_call@ */
315 0, /* @tp_str@ */
316 0, /* @tp_getattro@ */
317 0, /* @tp_setattro@ */
318 0, /* @tp_as_buffer@ */
319 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
320 Py_TPFLAGS_BASETYPE,
321
322 /* @tp_doc@ */
323 "Key size constraints. Abstract.",
324
325 0, /* @tp_traverse@ */
326 0, /* @tp_clear@ */
327 0, /* @tp_richcompare@ */
328 0, /* @tp_weaklistoffset@ */
329 0, /* @tp_iter@ */
330 0, /* @tp_iternext@ */
331 PYMETHODS(keysz), /* @tp_methods@ */
332 PYMEMBERS(keysz), /* @tp_members@ */
333 0, /* @tp_getset@ */
334 0, /* @tp_base@ */
335 0, /* @tp_dict@ */
336 0, /* @tp_descr_get@ */
337 0, /* @tp_descr_set@ */
338 0, /* @tp_dictoffset@ */
339 0, /* @tp_init@ */
340 PyType_GenericAlloc, /* @tp_alloc@ */
341 abstract_pynew, /* @tp_new@ */
342 0, /* @tp_free@ */
343 0 /* @tp_is_gc@ */
344 };
345
346 static PyTypeObject keyszany_pytype_skel = {
347 PyObject_HEAD_INIT(0) 0, /* Header */
348 "KeySZAny", /* @tp_name@ */
349 sizeof(keysz_pyobj), /* @tp_basicsize@ */
350 0, /* @tp_itemsize@ */
351
352 0, /* @tp_dealloc@ */
353 0, /* @tp_print@ */
354 0, /* @tp_getattr@ */
355 0, /* @tp_setattr@ */
356 0, /* @tp_compare@ */
357 0, /* @tp_repr@ */
358 0, /* @tp_as_number@ */
359 0, /* @tp_as_sequence@ */
360 0, /* @tp_as_mapping@ */
361 0, /* @tp_hash@ */
362 0, /* @tp_call@ */
363 0, /* @tp_str@ */
364 0, /* @tp_getattro@ */
365 0, /* @tp_setattro@ */
366 0, /* @tp_as_buffer@ */
367 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
368 Py_TPFLAGS_BASETYPE,
369
370 /* @tp_doc@ */
371 "KeySZAny(DEFAULT)\n"
372 " Key size constraints. This object imposes no constraints on size.",
373
374 0, /* @tp_traverse@ */
375 0, /* @tp_clear@ */
376 0, /* @tp_richcompare@ */
377 0, /* @tp_weaklistoffset@ */
378 0, /* @tp_iter@ */
379 0, /* @tp_iternext@ */
380 0, /* @tp_methods@ */
381 0, /* @tp_members@ */
382 PYGETSET(keyszany), /* @tp_getset@ */
383 0, /* @tp_base@ */
384 0, /* @tp_dict@ */
385 0, /* @tp_descr_get@ */
386 0, /* @tp_descr_set@ */
387 0, /* @tp_dictoffset@ */
388 0, /* @tp_init@ */
389 PyType_GenericAlloc, /* @tp_alloc@ */
390 keyszany_pynew, /* @tp_new@ */
391 0, /* @tp_free@ */
392 0 /* @tp_is_gc@ */
393 };
394
395 static PyTypeObject keyszrange_pytype_skel = {
396 PyObject_HEAD_INIT(0) 0, /* Header */
397 "KeySZRange", /* @tp_name@ */
398 sizeof(keyszrange_pyobj), /* @tp_basicsize@ */
399 0, /* @tp_itemsize@ */
400
401 0, /* @tp_dealloc@ */
402 0, /* @tp_print@ */
403 0, /* @tp_getattr@ */
404 0, /* @tp_setattr@ */
405 0, /* @tp_compare@ */
406 0, /* @tp_repr@ */
407 0, /* @tp_as_number@ */
408 0, /* @tp_as_sequence@ */
409 0, /* @tp_as_mapping@ */
410 0, /* @tp_hash@ */
411 0, /* @tp_call@ */
412 0, /* @tp_str@ */
413 0, /* @tp_getattro@ */
414 0, /* @tp_setattro@ */
415 0, /* @tp_as_buffer@ */
416 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
417 Py_TPFLAGS_BASETYPE,
418
419 /* @tp_doc@ */
420 "KeySZRange(DEFAULT, [min = 0], [max = 0], [mod = 1])\n"
421 " Key size constraints: size must be between MIN and MAX inclusive, and\n"
422 " be a multiple of MOD.",
423
424 0, /* @tp_traverse@ */
425 0, /* @tp_clear@ */
426 0, /* @tp_richcompare@ */
427 0, /* @tp_weaklistoffset@ */
428 0, /* @tp_iter@ */
429 0, /* @tp_iternext@ */
430 0, /* @tp_methods@ */
431 PYMEMBERS(keyszrange), /* @tp_members@ */
432 0, /* @tp_getset@ */
433 0, /* @tp_base@ */
434 0, /* @tp_dict@ */
435 0, /* @tp_descr_get@ */
436 0, /* @tp_descr_set@ */
437 0, /* @tp_dictoffset@ */
438 0, /* @tp_init@ */
439 PyType_GenericAlloc, /* @tp_alloc@ */
440 keyszrange_pynew, /* @tp_new@ */
441 0, /* @tp_free@ */
442 0 /* @tp_is_gc@ */
443 };
444
445 static PyTypeObject keyszset_pytype_skel = {
446 PyObject_HEAD_INIT(0) 0, /* Header */
447 "KeySZSet", /* @tp_name@ */
448 sizeof(keyszset_pyobj), /* @tp_basicsize@ */
449 0, /* @tp_itemsize@ */
450
451 0, /* @tp_dealloc@ */
452 0, /* @tp_print@ */
453 0, /* @tp_getattr@ */
454 0, /* @tp_setattr@ */
455 0, /* @tp_compare@ */
456 0, /* @tp_repr@ */
457 0, /* @tp_as_number@ */
458 0, /* @tp_as_sequence@ */
459 0, /* @tp_as_mapping@ */
460 0, /* @tp_hash@ */
461 0, /* @tp_call@ */
462 0, /* @tp_str@ */
463 0, /* @tp_getattro@ */
464 0, /* @tp_setattro@ */
465 0, /* @tp_as_buffer@ */
466 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
467 Py_TPFLAGS_BASETYPE,
468
469 /* @tp_doc@ */
470 "KeySZSet(DEFAULT, SEQ)\n"
471 " Key size constraints: size must be DEFAULT or an element of SEQ.",
472
473 0, /* @tp_traverse@ */
474 0, /* @tp_clear@ */
475 0, /* @tp_richcompare@ */
476 0, /* @tp_weaklistoffset@ */
477 0, /* @tp_iter@ */
478 0, /* @tp_iternext@ */
479 0, /* @tp_methods@ */
480 PYMEMBERS(keyszset), /* @tp_members@ */
481 PYGETSET(keyszset), /* @tp_getset@ */
482 0, /* @tp_base@ */
483 0, /* @tp_dict@ */
484 0, /* @tp_descr_get@ */
485 0, /* @tp_descr_set@ */
486 0, /* @tp_dictoffset@ */
487 0, /* @tp_init@ */
488 PyType_GenericAlloc, /* @tp_alloc@ */
489 keyszset_pynew, /* @tp_new@ */
490 0, /* @tp_free@ */
491 0 /* @tp_is_gc@ */
492 };
493
494 /*----- Symmetric encryption ----------------------------------------------*/
495
496 static PyTypeObject *gccipher_pytype, *gcipher_pytype;
497
498 typedef struct gccipher_pyobj {
499 PyHeapTypeObject ty;
500 gccipher *cc;
501 } gccipher_pyobj;
502
503 #define GCCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gccipher_pytype)
504 #define GCCIPHER_CC(o) (((gccipher_pyobj *)(o))->cc)
505
506 typedef struct gcipher_pyobj {
507 PyObject_HEAD
508 gcipher *c;
509 } gcipher_pyobj;
510
511 #define GCIPHER_PYCHECK(o) PyObject_TypeCheck((o), gcipher_pytype)
512 #define GCIPHER_C(o) (((gcipher_pyobj *)(o))->c)
513
514 CONVFUNC(gccipher, gccipher *, GCCIPHER_CC)
515
516 static PyObject *gcipher_pywrap(PyObject *cobj, gcipher *c)
517 {
518 gcipher_pyobj *g;
519 if (!cobj) cobj = gccipher_pywrap((/*unconst*/ gccipher *)GC_CLASS(c));
520 else Py_INCREF(cobj);
521 g = PyObject_NEW(gcipher_pyobj, (PyTypeObject *)cobj);
522 g->c = c;
523 return ((PyObject *)g);
524 }
525
526 static PyObject *gcipher_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
527 {
528 static const char *const kwlist[] = { "k", 0 };
529 char *k;
530 Py_ssize_t sz;
531
532 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
533 goto end;
534 if (keysz(sz, GCCIPHER_CC(ty)->keysz) != sz) VALERR("bad key length");
535 return (gcipher_pywrap((PyObject *)ty,
536 GC_INIT(GCCIPHER_CC(ty), k, sz)));
537 end:
538 return (0);
539 }
540
541 PyObject *gccipher_pywrap(gccipher *cc)
542 {
543 gccipher_pyobj *g = newtype(gccipher_pytype, 0, cc->name);
544 g->cc = cc;
545 g->ty.ht_type.tp_basicsize = sizeof(gcipher_pyobj);
546 g->ty.ht_type.tp_base = gcipher_pytype;
547 Py_INCREF(gcipher_pytype);
548 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
549 Py_TPFLAGS_BASETYPE |
550 Py_TPFLAGS_HEAPTYPE);
551 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
552 g->ty.ht_type.tp_free = 0;
553 g->ty.ht_type.tp_new = gcipher_pynew;
554 typeready(&g->ty.ht_type);
555 return ((PyObject *)g);
556 }
557
558 static void gcipher_pydealloc(PyObject *me)
559 {
560 GC_DESTROY(GCIPHER_C(me));
561 Py_DECREF(me->ob_type);
562 FREEOBJ(me);
563 }
564
565 static PyObject *gccget_name(PyObject *me, void *hunoz)
566 { return (PyString_FromString(GCCIPHER_CC(me)->name)); }
567
568 static PyObject *gccget_keysz(PyObject *me, void *hunoz)
569 { return (keysz_pywrap(GCCIPHER_CC(me)->keysz)); }
570
571 static PyObject *gccget_blksz(PyObject *me, void *hunoz)
572 { return (PyInt_FromLong(GCCIPHER_CC(me)->blksz)); }
573
574 static PyObject *gcmeth_encrypt(PyObject *me, PyObject *arg)
575 {
576 char *p;
577 Py_ssize_t sz;
578 PyObject *rc = 0;
579
580 if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &sz)) return (0);
581 rc = bytestring_pywrap(0, sz);
582 GC_ENCRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
583 return (rc);
584 }
585
586 static PyObject *gcmeth_enczero(PyObject *me, PyObject *arg)
587 {
588 char *p;
589 int sz;
590 PyObject *rc = 0;
591
592 if (!PyArg_ParseTuple(arg, "i:enczero", &sz)) return (0);
593 rc = bytestring_pywrap(0, sz);
594 p = PyString_AS_STRING(rc);
595 memset(p, 0, sz);
596 GC_ENCRYPT(GCIPHER_C(me), p, p, sz);
597 return (rc);
598 }
599
600 static PyObject *gcmeth_decrypt(PyObject *me, PyObject *arg)
601 {
602 char *p;
603 Py_ssize_t sz;
604 PyObject *rc = 0;
605
606 if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &sz)) return (0);
607 rc = bytestring_pywrap(0, sz);
608 GC_DECRYPT(GCIPHER_C(me), p, PyString_AS_STRING(rc), sz);
609 return (rc);
610 }
611
612 static PyObject *gcmeth_deczero(PyObject *me, PyObject *arg)
613 {
614 char *p;
615 int sz;
616 PyObject *rc = 0;
617
618 if (!PyArg_ParseTuple(arg, "i:deczero", &sz)) return (0);
619 rc = bytestring_pywrap(0, sz);
620 p = PyString_AS_STRING(rc);
621 memset(p, 0, sz);
622 GC_DECRYPT(GCIPHER_C(me), p, p, sz);
623 return (rc);
624 }
625
626 static PyObject *gcmeth_setiv(PyObject *me, PyObject *arg)
627 {
628 char *p;
629 Py_ssize_t sz;
630
631 if (!PyArg_ParseTuple(arg, "s#:setiv", &p, &sz)) goto end;
632 if (!GCIPHER_C(me)->ops->setiv) VALERR("`setiv' not supported");
633 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
634 if (sz != GC_CLASS(GCIPHER_C(me))->blksz) VALERR("bad IV length");
635 GC_SETIV(GCIPHER_C(me), p);
636 RETURN_ME;
637 end:
638 return (0);
639 }
640
641 static PyObject *gcmeth_bdry(PyObject *me)
642 {
643 if (!GCIPHER_C(me)->ops->bdry) VALERR("`bdry' not supported");
644 if (!GC_CLASS(GCIPHER_C(me))->blksz) VALERR("not a block cipher mode");
645 GC_BDRY(GCIPHER_C(me));
646 RETURN_ME;
647 end:
648 return (0);
649 }
650
651 static const PyGetSetDef gccipher_pygetset[] = {
652 #define GETSETNAME(op, name) gcc##op##_##name
653 GET (keysz, "CC.keysz -> acceptable key sizes")
654 GET (blksz, "CC.blksz -> block size, or zero")
655 GET (name, "CC.name -> name of this kind of cipher")
656 #undef GETSETNAME
657 { 0 }
658 };
659
660 static const PyMethodDef gcipher_pymethods[] = {
661 #define METHNAME(name) gcmeth_##name
662 METH (encrypt, "C.encrypt(PT) -> CT")
663 METH (enczero, "C.enczero(N) -> CT")
664 METH (decrypt, "C.decrypt(CT) -> PT")
665 METH (deczero, "C.deczero(N) -> PT")
666 METH (setiv, "C.setiv(IV)")
667 NAMETH(bdry, "C.bdry()")
668 #undef METHNAME
669 { 0 }
670 };
671
672 static PyTypeObject gccipher_pytype_skel = {
673 PyObject_HEAD_INIT(0) 0, /* Header */
674 "GCCipher", /* @tp_name@ */
675 sizeof(gccipher_pyobj), /* @tp_basicsize@ */
676 0, /* @tp_itemsize@ */
677
678 0, /* @tp_dealloc@ */
679 0, /* @tp_print@ */
680 0, /* @tp_getattr@ */
681 0, /* @tp_setattr@ */
682 0, /* @tp_compare@ */
683 0, /* @tp_repr@ */
684 0, /* @tp_as_number@ */
685 0, /* @tp_as_sequence@ */
686 0, /* @tp_as_mapping@ */
687 0, /* @tp_hash@ */
688 0, /* @tp_call@ */
689 0, /* @tp_str@ */
690 0, /* @tp_getattro@ */
691 0, /* @tp_setattro@ */
692 0, /* @tp_as_buffer@ */
693 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
694 Py_TPFLAGS_BASETYPE,
695
696 /* @tp_doc@ */
697 "Symmetric cipher metaclass.",
698
699 0, /* @tp_traverse@ */
700 0, /* @tp_clear@ */
701 0, /* @tp_richcompare@ */
702 0, /* @tp_weaklistoffset@ */
703 0, /* @tp_iter@ */
704 0, /* @tp_iternext@ */
705 0, /* @tp_methods@ */
706 0, /* @tp_members@ */
707 PYGETSET(gccipher), /* @tp_getset@ */
708 0, /* @tp_base@ */
709 0, /* @tp_dict@ */
710 0, /* @tp_descr_get@ */
711 0, /* @tp_descr_set@ */
712 0, /* @tp_dictoffset@ */
713 0, /* @tp_init@ */
714 PyType_GenericAlloc, /* @tp_alloc@ */
715 abstract_pynew, /* @tp_new@ */
716 0, /* @tp_free@ */
717 0 /* @tp_is_gc@ */
718 };
719
720 static PyTypeObject gcipher_pytype_skel = {
721 PyObject_HEAD_INIT(0) 0, /* Header */
722 "GCipher", /* @tp_name@ */
723 sizeof(gcipher_pyobj), /* @tp_basicsize@ */
724 0, /* @tp_itemsize@ */
725
726 gcipher_pydealloc, /* @tp_dealloc@ */
727 0, /* @tp_print@ */
728 0, /* @tp_getattr@ */
729 0, /* @tp_setattr@ */
730 0, /* @tp_compare@ */
731 0, /* @tp_repr@ */
732 0, /* @tp_as_number@ */
733 0, /* @tp_as_sequence@ */
734 0, /* @tp_as_mapping@ */
735 0, /* @tp_hash@ */
736 0, /* @tp_call@ */
737 0, /* @tp_str@ */
738 0, /* @tp_getattro@ */
739 0, /* @tp_setattro@ */
740 0, /* @tp_as_buffer@ */
741 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
742 Py_TPFLAGS_BASETYPE,
743
744 /* @tp_doc@ */
745 "Symmetric cipher, abstract base class.",
746
747 0, /* @tp_traverse@ */
748 0, /* @tp_clear@ */
749 0, /* @tp_richcompare@ */
750 0, /* @tp_weaklistoffset@ */
751 0, /* @tp_iter@ */
752 0, /* @tp_iternext@ */
753 PYMETHODS(gcipher), /* @tp_methods@ */
754 0, /* @tp_members@ */
755 0, /* @tp_getset@ */
756 0, /* @tp_base@ */
757 0, /* @tp_dict@ */
758 0, /* @tp_descr_get@ */
759 0, /* @tp_descr_set@ */
760 0, /* @tp_dictoffset@ */
761 0, /* @tp_init@ */
762 PyType_GenericAlloc, /* @tp_alloc@ */
763 abstract_pynew, /* @tp_new@ */
764 0, /* @tp_free@ */
765 0 /* @tp_is_gc@ */
766 };
767
768 /*----- Authenticated encryption ------------------------------------------*/
769
770 static PyTypeObject *gcaead_pytype, *gaeadkey_pytype;
771 static PyTypeObject *gcaeadaad_pytype, *gaeadaad_pytype;
772 static PyTypeObject *gcaeadenc_pytype, *gaeadenc_pytype;
773 static PyTypeObject *gcaeaddec_pytype, *gaeaddec_pytype;
774
775 typedef struct gcaead_pyobj {
776 PyHeapTypeObject ty;
777 gcaead *aec;
778 struct gcaeadaad_pyobj *aad;
779 struct gcaeadenc_pyobj *enc;
780 struct gcaeaddec_pyobj *dec;
781 } gcaead_pyobj;
782
783 #define GCAEAD_PYCHECK(o) PyObject_TypeCheck((o), gcaead_pytype)
784 #define GCAEAD_AEC(o) (((gcaead_pyobj *)(o))->aec)
785 #define GCAEAD_AAD(o) (((gcaead_pyobj *)(o))->aad)
786 #define GCAEAD_ENC(o) (((gcaead_pyobj *)(o))->enc)
787 #define GCAEAD_DEC(o) (((gcaead_pyobj *)(o))->dec)
788 static PyObject *gcaead_pywrap(gcaead *);
789
790 typedef struct gaeadkey_pyobj {
791 PyObject_HEAD
792 gaead_key *k;
793 } gaeadkey_pyobj;
794
795 #define GAEADKEY_PYCHECK(o) PyObject_TypeCheck((o), gaeadkey_pytype)
796 #define GAEADKEY_K(o) (((gaeadkey_pyobj *)(o))->k)
797
798 typedef struct gcaeadaad_pyobj {
799 PyHeapTypeObject ty;
800 gcaead_pyobj *key;
801 } gcaeadaad_pyobj;
802
803 #define GCAEADAAD_KEY(o) (((gcaeadaad_pyobj *)(o))->key)
804 static PyObject *gaeadaad_pywrap(PyObject *, gaead_aad *, unsigned, size_t);
805
806 typedef struct gaeadaad_pyobj {
807 PyObject_HEAD
808 gaead_aad *a;
809 unsigned f;
810 #define AEADF_DEAD 32768u
811 size_t hsz, hlen;
812 } gaeadaad_pyobj;
813
814 #define GAEADAAD_PYCHECK(o) PyObject_TypeCheck((o), gaeadaad_pytype)
815 #define GAEADAAD_A(o) (((gaeadaad_pyobj *)(o))->a)
816 #define GAEADAAD_F(o) (((gaeadaad_pyobj *)(o))->f)
817 #define GAEADAAD_HSZ(o) (((gaeadaad_pyobj *)(o))->hsz)
818 #define GAEADAAD_HLEN(o) (((gaeadaad_pyobj *)(o))->hlen)
819
820 typedef struct gcaeadenc_pyobj {
821 PyHeapTypeObject ty;
822 gcaead_pyobj *key;
823 } gcaeadenc_pyobj;
824
825 #define GCAEADENC_KEY(o) (((gcaeadenc_pyobj *)(o))->key)
826 static PyObject *gaeadenc_pywrap(PyObject *, gaead_enc *, unsigned,
827 size_t, size_t, size_t);
828
829 typedef struct gaeadenc_pyobj {
830 PyObject_HEAD
831 gaead_enc *e;
832 gaeadaad_pyobj *aad;
833 unsigned f;
834 size_t hsz, msz, tsz;
835 size_t mlen;
836 } gaeadenc_pyobj;
837
838 #define GAEADENC_PYCHECK(o) PyObject_TypeCheck((o), gaeadenc_pytype)
839 #define GAEADENC_AAD(o) (((gaeadenc_pyobj *)(o))->aad)
840 #define GAEADENC_E(o) (((gaeadenc_pyobj *)(o))->e)
841 #define GAEADENC_F(o) (((gaeadenc_pyobj *)(o))->f)
842 #define GAEADENC_HSZ(o) (((gaeadenc_pyobj *)(o))->hsz)
843 #define GAEADENC_MSZ(o) (((gaeadenc_pyobj *)(o))->msz)
844 #define GAEADENC_TSZ(o) (((gaeadenc_pyobj *)(o))->tsz)
845 #define GAEADENC_MLEN(o) (((gaeadenc_pyobj *)(o))->mlen)
846
847 typedef struct gcaeaddec_pyobj {
848 PyHeapTypeObject ty;
849 gcaead_pyobj *key;
850 } gcaeaddec_pyobj;
851
852 #define GCAEADDEC_KEY(o) (((gcaeaddec_pyobj *)(o))->key)
853 static PyObject *gaeaddec_pywrap(PyObject *, gaead_dec *, unsigned,
854 size_t, size_t, size_t);
855
856 typedef struct gaeaddec_pyobj {
857 PyObject_HEAD
858 gaead_dec *d;
859 gaeadaad_pyobj *aad;
860 unsigned f;
861 size_t hsz, csz, tsz;
862 size_t clen;
863 } gaeaddec_pyobj;
864
865 #define GAEADDEC_PYCHECK(o) PyObject_TypeCheck((o), gaeaddec_pytype)
866 #define GAEADDEC_AAD(o) (((gaeaddec_pyobj *)(o))->aad)
867 #define GAEADDEC_D(o) (((gaeaddec_pyobj *)(o))->d)
868 #define GAEADDEC_F(o) (((gaeaddec_pyobj *)(o))->f)
869 #define GAEADDEC_HSZ(o) (((gaeaddec_pyobj *)(o))->hsz)
870 #define GAEADDEC_CSZ(o) (((gaeaddec_pyobj *)(o))->csz)
871 #define GAEADDEC_TSZ(o) (((gaeaddec_pyobj *)(o))->tsz)
872 #define GAEADDEC_CLEN(o) (((gaeaddec_pyobj *)(o))->clen)
873
874 static PyObject *gaeadkey_pywrap(PyObject *cobj, gaead_key *k)
875 {
876 gaeadkey_pyobj *gk;
877
878 if (!cobj) cobj = gcaead_pywrap((/*unconst*/ gcaead *)GAEAD_CLASS(k));
879 else Py_INCREF(cobj);
880 gk = PyObject_NEW(gaeadkey_pyobj, (PyTypeObject *)cobj);
881 gk->k = k;
882 return ((PyObject *)gk);
883 }
884
885 static PyObject *gaeadkey_pynew(PyTypeObject *ty,
886 PyObject *arg, PyObject *kw)
887 {
888 static const char *const kwlist[] = { "k", 0 };
889 char *k;
890 Py_ssize_t sz;
891
892 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
893 goto end;
894 if (keysz(sz, GCAEAD_AEC(ty)->keysz) != sz) VALERR("bad key length");
895 return (gaeadkey_pywrap((PyObject *)ty,
896 GAEAD_KEY(GCAEAD_AEC(ty), k, sz)));
897 end:
898 return (0);
899 }
900
901 static PyObject *gcaead_pywrap(gcaead *aec)
902 {
903 gcaead_pyobj *gck;
904 gcaeadaad_pyobj *gca;
905 gcaeadenc_pyobj *gce;
906 gcaeaddec_pyobj *gcd;
907
908 #define MKTYPE(obj, thing, newfn, namefmt) do { \
909 (obj) = newtype(gcaead_pytype, 0, 0); \
910 (obj)->ty.ht_name = PyString_FromFormat(namefmt, aec->name); \
911 (obj)->ty.ht_type.tp_name = PyString_AS_STRING((obj)->ty.ht_name); \
912 (obj)->ty.ht_type.tp_basicsize = sizeof(gaead##thing##_pyobj); \
913 (obj)->ty.ht_type.tp_base = gaead##thing##_pytype; \
914 Py_INCREF(gaead##thing##_pytype); \
915 (obj)->ty.ht_type.tp_flags = \
916 (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HEAPTYPE); \
917 (obj)->ty.ht_type.tp_alloc = PyType_GenericAlloc; \
918 (obj)->ty.ht_type.tp_free = 0; \
919 (obj)->ty.ht_type.tp_new = newfn; \
920 typeready(&(obj)->ty.ht_type); \
921 } while (0)
922
923 MKTYPE(gck, key, gaeadkey_pynew, "%s(key)");
924 MKTYPE(gca, aad, abstract_pynew, "%s(aad-hash)");
925 MKTYPE(gce, enc, abstract_pynew, "%s(encrypt)");
926 MKTYPE(gcd, dec, abstract_pynew, "%s(decrypt)");
927
928 #undef MKTYPE
929
930 gck->aec = aec; gck->aad = gca; gck->enc = gce; gck->dec = gcd;
931 gca->key = gce->key = gcd->key = gck;
932 return ((PyObject *)gck);
933 }
934
935 static void gaeadkey_pydealloc(PyObject *me)
936 { GAEAD_DESTROY(GAEADKEY_K(me)); Py_DECREF(me->ob_type); FREEOBJ(me); }
937
938 static PyObject *gcaeget_name(PyObject *me, void *hunoz)
939 { return (PyString_FromString(GCAEAD_AEC(me)->name)); }
940
941 static PyObject *gcaeget_keysz(PyObject *me, void *hunoz)
942 { return (keysz_pywrap(GCAEAD_AEC(me)->keysz)); }
943
944 static PyObject *gcaeget_noncesz(PyObject *me, void *hunoz)
945 { return (keysz_pywrap(GCAEAD_AEC(me)->noncesz)); }
946
947 static PyObject *gcaeget_tagsz(PyObject *me, void *hunoz)
948 { return (keysz_pywrap(GCAEAD_AEC(me)->tagsz)); }
949
950 static PyObject *gcaeget_blksz(PyObject *me, void *hunoz)
951 { return (PyInt_FromLong(GCAEAD_AEC(me)->blksz)); }
952
953 static PyObject *gcaeget_bufsz(PyObject *me, void *hunoz)
954 { return (PyInt_FromLong(GCAEAD_AEC(me)->bufsz)); }
955
956 static PyObject *gcaeget_ohd(PyObject *me, void *hunoz)
957 { return (PyInt_FromLong(GCAEAD_AEC(me)->ohd)); }
958
959 static PyObject *gcaeget_flags(PyObject *me, void *hunoz)
960 { return (PyInt_FromLong(GCAEAD_AEC(me)->f)); }
961
962 static const PyGetSetDef gcaead_pygetset[] = {
963 #define GETSETNAME(op, name) gcae##op##_##name
964 GET (keysz, "AEC.keysz -> acceptable key sizes")
965 GET (noncesz, "AEC.noncesz -> acceptable nonce sizes")
966 GET (tagsz, "AEC.tagsz -> acceptable tag sizes")
967 GET (blksz, "AEC.blksz -> block size, or zero")
968 GET (bufsz, "AEC.bufsz -> amount of data buffered internally")
969 GET (ohd, "AEC.ohd -> maximum encryption overhead")
970 GET (name, "AEC.name -> name of this kind of AEAD scheme")
971 GET (flags, "AEC.flags -> mask of `AEADF_...' flags")
972 #undef GETSETNAME
973 { 0 }
974 };
975
976 static PyObject *gaekmeth_aad(PyObject *me)
977 {
978 const gaead_key *k = GAEADKEY_K(me);
979 PyObject *rc = 0;
980
981 if (k->ops->c->f&AEADF_AADNDEP)
982 VALERR("aad must be associated with enc/dec op");
983 rc = gaeadaad_pywrap((PyObject *)GCAEAD_AAD(me->ob_type),
984 GAEAD_AAD(k), 0, 0);
985 end:
986 return (rc);
987 }
988
989 static int check_aead_encdec(const gcaead *aec, unsigned *f_out, size_t nsz,
990 PyObject *hszobj, size_t *hsz_out,
991 PyObject *mszobj, size_t *msz_out,
992 PyObject *tszobj, size_t *tsz_out)
993 {
994 unsigned f = 0, miss;
995 int rc = -1;
996
997 if (hszobj != Py_None)
998 { f |= AEADF_PCHSZ; if (!convszt(hszobj, hsz_out)) goto end; }
999 if (mszobj != Py_None)
1000 { f |= AEADF_PCMSZ; if (!convszt(mszobj, msz_out)) goto end; }
1001 if (tszobj != Py_None)
1002 { f |= AEADF_PCTSZ; if (!convszt(tszobj, tsz_out)) goto end; }
1003 miss = aec->f&~f;
1004 if (miss&AEADF_PCHSZ) VALERR("header length precommitment required");
1005 if (miss&AEADF_PCMSZ) VALERR("message length precommitment required");
1006 if (miss&AEADF_PCTSZ) VALERR("tag length precommitment required");
1007 if (keysz(nsz, aec->noncesz) != nsz) VALERR("bad nonce length");
1008 if (tszobj != Py_None && keysz(*tsz_out, aec->tagsz) != *tsz_out)
1009 VALERR("bad tag length");
1010 *f_out = f | aec->f; rc = 0;
1011 end:
1012 return (rc);
1013 }
1014
1015 static PyObject *gaekmeth_enc(PyObject *me, PyObject *arg, PyObject *kw)
1016 {
1017 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1018 const gaead_key *k = GAEADKEY_K(me);
1019 gaead_enc *e;
1020 PyObject *rc = 0;
1021 char *n; Py_ssize_t nsz;
1022 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1023 size_t hsz = 0, msz = 0, tsz = 0;
1024 unsigned f;
1025
1026 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1027 &n, &nsz, &hszobj, &mszobj, &tszobj))
1028 goto end;
1029 if (check_aead_encdec(k->ops->c, &f, nsz,
1030 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1031 goto end;
1032 e = GAEAD_ENC(GAEADKEY_K(me), n, nsz, hsz, msz, tsz);
1033 if (!e) VALERR("bad aead parameter combination");
1034 rc = gaeadenc_pywrap((PyObject *)GCAEAD_ENC(me->ob_type),
1035 e, f, hsz, msz, tsz);
1036 end:
1037 return (rc);
1038 }
1039
1040 static PyObject *gaekmeth_dec(PyObject *me, PyObject *arg, PyObject *kw)
1041 {
1042 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1043 const gaead_key *k = GAEADKEY_K(me);
1044 gaead_dec *d;
1045 PyObject *rc = 0;
1046 char *n; Py_ssize_t nsz;
1047 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1048 size_t hsz = 0, csz = 0, tsz = 0;
1049 unsigned f;
1050
1051 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:dec", KWLIST,
1052 &n, &nsz, &hszobj, &cszobj, &tszobj))
1053 goto end;
1054 if (check_aead_encdec(k->ops->c, &f, nsz,
1055 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1056 goto end;
1057 d = GAEAD_DEC(GAEADKEY_K(me), n, nsz, hsz, csz, tsz);
1058 if (!d) VALERR("bad aead parameter combination");
1059 rc = gaeaddec_pywrap((PyObject *)GCAEAD_DEC(me->ob_type),
1060 d, f, hsz, csz, tsz);
1061 end:
1062 return (rc);
1063 }
1064
1065 static const PyMethodDef gaeadkey_pymethods[] = {
1066 #define METHNAME(name) gaekmeth_##name
1067 NAMETH(aad, "KEY.aad() -> AAD")
1068 KWMETH(enc, "KEY.enc(NONCE, [hsz], [msz], [tsz]) -> ENC")
1069 KWMETH(dec, "KEY.dec(NONCE, [hsz], [csz], [tsz]) -> DEC")
1070 #undef METHNAME
1071 { 0 }
1072 };
1073
1074 static PyObject *gaeadaad_pywrap(PyObject *cobj, gaead_aad *a,
1075 unsigned f, size_t hsz)
1076 {
1077 gaeadaad_pyobj *ga;
1078
1079 assert(cobj); Py_INCREF(cobj);
1080 ga = PyObject_NEW(gaeadaad_pyobj, (PyTypeObject *)cobj);
1081 ga->a = a; ga->f = f; ga->hsz = hsz; ga->hlen = 0;
1082 return ((PyObject *)ga);
1083 }
1084
1085 static void gaeadaad_pydealloc(PyObject *me)
1086 {
1087 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1088
1089 if (ga->a) GAEAD_DESTROY(ga->a);
1090 Py_DECREF(me->ob_type); FREEOBJ(me);
1091 }
1092
1093 static int gaea_check(PyObject *me)
1094 {
1095 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1096 int rc = -1;
1097
1098 if ((ga->f&AEADF_DEAD) || !ga->a) VALERR("aad object no longer active");
1099 rc = 0;
1100 end:
1101 return (rc);
1102 }
1103
1104 static void gaea_invalidate(gaeadaad_pyobj *ga)
1105 { if (ga) ga->f |= AEADF_DEAD; }
1106
1107 static void gaea_sever(gaeadaad_pyobj **ga_inout)
1108 {
1109 gaeadaad_pyobj *ga = *ga_inout;
1110 if (ga) { ga->f |= AEADF_DEAD; ga->a = 0; Py_DECREF(ga); *ga_inout = 0; }
1111 }
1112
1113 static PyObject *gaeaget_hsz(PyObject *me, void *hunoz)
1114 {
1115 if (gaea_check(me)) return (0);
1116 else if (GAEADAAD_F(me)&AEADF_PCHSZ) return getulong(GAEADAAD_HSZ(me));
1117 else RETURN_NONE;
1118 }
1119
1120 static PyObject *gaeaget_hlen(PyObject *me, void *hunoz)
1121 { return (gaea_check(me) ? 0 : getulong(GAEADAAD_HLEN(me))); }
1122
1123 static const PyGetSetDef gaeadaad_pygetset[] = {
1124 #define GETSETNAME(op, name) gaea##op##_##name
1125 GET (hsz, "AAD.hsz -> precommitted header length or `None'")
1126 GET (hlen, "AAD.hlen -> header length so far")
1127 #undef GETSETNAME
1128 { 0 }
1129 };
1130
1131 static PyObject *gaeameth_copy(PyObject *me)
1132 {
1133 PyObject *rc = 0;
1134
1135 if (gaea_check(me)) goto end;
1136 if (GAEADAAD_F(me)&AEADF_AADNDEP)
1137 VALERR("can't duplicate nonce-dependent aad");
1138 rc = gaeadaad_pywrap((PyObject *)me->ob_type,
1139 GAEAD_DUP(GAEADAAD_A(me)), 0, 0);
1140 GAEADAAD_HLEN(rc) = GAEADAAD_HLEN(me);
1141 end:
1142 return (rc);
1143 }
1144
1145 static int gaeadaad_hash(PyObject *me, const void *h, size_t hsz)
1146 {
1147 gaeadaad_pyobj *ga = (gaeadaad_pyobj *)me;
1148 int rc = -1;
1149
1150 if (gaea_check(me)) goto end;
1151 if ((ga->f&AEADF_NOAAD) && hsz)
1152 VALERR("header data not permitted");
1153 if ((ga->f&AEADF_PCHSZ) && hsz > ga->hsz - ga->hlen)
1154 VALERR("too large for precommitted header length");
1155 GAEAD_HASH(ga->a, h, hsz); ga->hlen += hsz;
1156 rc = 0;
1157 end:
1158 return (rc);
1159 }
1160
1161
1162 static PyObject *gaeameth_hash(PyObject *me, PyObject *arg)
1163 {
1164 char *h; Py_ssize_t hsz;
1165
1166 if (!PyArg_ParseTuple(arg, "s#:hash", &h, &hsz)) return (0);
1167 if (gaeadaad_hash(me, h, hsz)) return (0);
1168 RETURN_ME;
1169 }
1170
1171 #define GAEAMETH_HASHU_(n, W, w) \
1172 static PyObject *gaeameth_hashu##w(PyObject *me, PyObject *arg) \
1173 { \
1174 uint##n x; octet b[SZ_##W]; \
1175 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
1176 STORE##W(b, x); if (gaeadaad_hash(me, b, sizeof(b))) return (0); \
1177 RETURN_ME; \
1178 }
1179 DOUINTCONV(GAEAMETH_HASHU_)
1180
1181 #define GAEAMETH_HASHBUF_(n, W, w) \
1182 static PyObject *gaeameth_hashbuf##w(PyObject *me, PyObject *arg) \
1183 { \
1184 char *p; Py_ssize_t sz; octet b[SZ_##W]; \
1185 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
1186 if (sz > MASK##n) TYERR("string too long"); \
1187 STORE##W(b, sz); if (gaeadaad_hash(me, b, sizeof(b))) goto end; \
1188 if (gaeadaad_hash(me, p, sz)) goto end; \
1189 RETURN_ME; \
1190 end: \
1191 return (0); \
1192 }
1193 DOUINTCONV(GAEAMETH_HASHBUF_)
1194
1195 static PyObject *gaeameth_hashstrz(PyObject *me, PyObject *arg)
1196 {
1197 char *p;
1198 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
1199 if (gaeadaad_hash(me, p, strlen(p) + 1)) return (0);
1200 RETURN_ME;
1201 }
1202
1203 static const PyMethodDef gaeadaad_pymethods[] = {
1204 #define METHNAME(name) gaeameth_##name
1205 NAMETH(copy, "AAD.copy() -> AAD'")
1206 METH (hash, "AAD.hash(H)")
1207 #define METHU_(n, W, w) METH(hashu##w, "AAD.hashu" #w "(WORD)")
1208 DOUINTCONV(METHU_)
1209 #undef METHU_
1210 #define METHBUF_(n, W, w) METH(hashbuf##w, "AAD.hashbuf" #w "(BYTES)")
1211 DOUINTCONV(METHBUF_)
1212 #undef METHBUF_
1213 METH (hashstrz, "AAD.hashstrz(STRING)")
1214 #undef METHNAME
1215 { 0 }
1216 };
1217
1218 static PyObject *gaeadenc_pywrap(PyObject *cobj, gaead_enc *e, unsigned f,
1219 size_t hsz, size_t msz, size_t tsz)
1220 {
1221 gaeadenc_pyobj *ge;
1222
1223 assert(cobj); Py_INCREF(cobj);
1224 ge = PyObject_NEW(gaeadenc_pyobj, (PyTypeObject *)cobj);
1225 ge->e = e; ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1226 ge->aad = 0; ge->mlen = 0;
1227 return ((PyObject *)ge);
1228 }
1229
1230 static void gaeadenc_pydealloc(PyObject *me)
1231 {
1232 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1233
1234 gaea_sever(&ge->aad); GAEAD_DESTROY(ge->e);
1235 Py_DECREF(me->ob_type); FREEOBJ(me);
1236 }
1237
1238 static PyObject *gaeeget_hsz(PyObject *me, void *hunoz)
1239 {
1240 if (GAEADENC_F(me)&AEADF_PCHSZ) return getulong(GAEADENC_HSZ(me));
1241 else RETURN_NONE;
1242 }
1243
1244 static PyObject *gaeeget_msz(PyObject *me, void *hunoz)
1245 {
1246 if (GAEADENC_F(me)&AEADF_PCMSZ) return getulong(GAEADENC_MSZ(me));
1247 else RETURN_NONE;
1248 }
1249
1250 static PyObject *gaeeget_tsz(PyObject *me, void *hunoz)
1251 {
1252 if (GAEADENC_F(me)&AEADF_PCTSZ) return getulong(GAEADENC_TSZ(me));
1253 else RETURN_NONE;
1254 }
1255
1256 static PyObject *gaeeget_mlen(PyObject *me, void *hunoz)
1257 { return getulong(GAEADENC_MLEN(me)); }
1258
1259 static const PyGetSetDef gaeadenc_pygetset[] = {
1260 #define GETSETNAME(op, name) gaee##op##_##name
1261 GET (hsz, "ENC.hsz -> precommitted header length or `None'")
1262 GET (msz, "ENC.msz -> precommitted message length or `None'")
1263 GET (tsz, "ENC.tsz -> precommitted tag length or `None'")
1264 GET (mlen, "ENC.mlen -> message length so far")
1265 #undef GETSETNAME
1266 { 0 }
1267 };
1268
1269 static PyObject *gaeemeth_aad(PyObject *me)
1270 {
1271 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1272 PyObject *rc = 0;
1273
1274 if (!(ge->f&AEADF_AADNDEP))
1275 rc = gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1276 GAEAD_AAD(ge->e), 0, 0);
1277 else {
1278 if ((ge->f&AEADF_AADFIRST) && ge->mlen)
1279 VALERR("too late for aad");
1280 if (!ge->aad)
1281 ge->aad = (gaeadaad_pyobj *)
1282 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(ge->ob_type)->aad,
1283 GAEAD_AAD(ge->e), ge->f&(AEADF_PCHSZ | AEADF_NOAAD),
1284 ge->hsz);
1285 Py_INCREF(ge->aad);
1286 rc = (PyObject *)ge->aad;
1287 }
1288 end:
1289 return (rc);
1290 }
1291
1292 static PyObject *gaeemeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1293 {
1294 static const char *const kwlist[] = { "nonce", "hsz", "msz", "tsz", 0 };
1295 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1296 char *n; Py_ssize_t nsz;
1297 PyObject *hszobj = Py_None, *mszobj = Py_None, *tszobj = Py_None;
1298 size_t hsz = 0, msz = 0, tsz = 0;
1299 unsigned f;
1300
1301 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1302 &n, &nsz, &hszobj, &mszobj, &tszobj))
1303 goto end;
1304 if (check_aead_encdec(ge->e->ops->c, &f, nsz,
1305 hszobj, &hsz, mszobj, &msz, tszobj, &tsz))
1306 goto end;
1307 if (GAEAD_REINIT(ge->e, n, nsz, hsz, msz, tsz))
1308 VALERR("bad aead parameter combination");
1309 gaea_sever(&ge->aad);
1310 ge->f = f; ge->hsz = hsz; ge->msz = msz; ge->tsz = tsz;
1311 end:
1312 return (0);
1313 }
1314
1315 static PyObject *gaeemeth_encrypt(PyObject *me, PyObject *arg)
1316 {
1317 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1318 char *m; Py_ssize_t msz;
1319 char *c = 0; size_t csz; buf b;
1320 int err;
1321 PyObject *rc = 0;
1322
1323 if (!PyArg_ParseTuple(arg, "s#:encrypt", &m, &msz)) goto end;
1324 if (ge->f&AEADF_AADFIRST) {
1325 if ((ge->f&AEADF_PCHSZ) && (ge->aad ? ge->aad->hlen : 0) != ge->hsz)
1326 VALERR("header doesn't match precommitted length");
1327 gaea_invalidate(ge->aad);
1328 }
1329 if ((ge->f&AEADF_PCMSZ) && msz > ge->msz - ge->mlen)
1330 VALERR("too large for precommitted message length");
1331 csz = msz + ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1332 err = GAEAD_ENCRYPT(ge->e, m, msz, &b); assert(!err); (void)err;
1333 buf_flip(&b); rc = bytestring_pywrapbuf(&b); ge->mlen += msz;
1334 end:
1335 xfree(c);
1336 return (rc);
1337 }
1338
1339 static PyObject *gaeemeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1340 {
1341 static const char *const kwlist[] = { "tsz", "aad", 0 };
1342 gaeadenc_pyobj *ge = (gaeadenc_pyobj *)me;
1343 PyObject *aad = Py_None;
1344 char *c = 0; size_t csz; buf b;
1345 PyObject *tszobj = Py_None; PyObject *tag; size_t tsz;
1346 int err;
1347 PyObject *rc = 0;
1348
1349 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|OO:done", KWLIST,
1350 &tszobj, &aad))
1351 goto end;
1352 if (tszobj != Py_None && !convszt(tszobj, &tsz)) goto end;
1353 if (aad != Py_None &&
1354 !PyObject_TypeCheck(aad,
1355 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1356 TYERR("wanted aad");
1357 if ((ge->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)ge->aad)
1358 VALERR("mismatched aad");
1359 if ((ge->f&AEADF_PCHSZ) &&
1360 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != ge->hsz)
1361 VALERR("header doesn't match precommitted length");
1362 if ((ge->f&AEADF_PCMSZ) && ge->mlen != ge->msz)
1363 VALERR("message doesn't match precommitted length");
1364 if (tszobj == Py_None) {
1365 if (ge->f&AEADF_PCTSZ) tsz = ge->tsz;
1366 else tsz = keysz(0, ge->e->ops->c->tagsz);
1367 } else {
1368 if ((ge->f&AEADF_PCTSZ) && tsz != ge->tsz)
1369 VALERR("tag length doesn't match precommitted value");
1370 if (keysz(tsz, ge->e->ops->c->tagsz) != tsz) VALERR("bad tag length");
1371 }
1372 csz = ge->e->ops->c->bufsz; c = xmalloc(csz); buf_init(&b, c, csz);
1373 tag = bytestring_pywrap(0, tsz);
1374 err = GAEAD_DONE(ge->e, aad == Py_None ? 0 : GAEADAAD_A(aad), &b,
1375 PyString_AS_STRING(tag), tsz);
1376 assert(!err); (void)err;
1377 buf_flip(&b); rc = Py_BuildValue("NN", bytestring_pywrapbuf(&b), tag);
1378 end:
1379 xfree(c);
1380 return (rc);
1381 }
1382
1383 static const PyMethodDef gaeadenc_pymethods[] = {
1384 #define METHNAME(name) gaeemeth_##name
1385 NAMETH(aad, "ENC.aad() -> AAD")
1386 KWMETH(reinit, "ENC.reinit(NONCE, [hsz], [msz], [tsz])")
1387 METH (encrypt, "ENC.encrypt(MSG) -> CT")
1388 KWMETH(done, "ENC.done([tsz], [aad]) -> CT, TAG")
1389 #undef METHNAME
1390 { 0 }
1391 };
1392
1393 static PyObject *gaeaddec_pywrap(PyObject *cobj, gaead_dec *d, unsigned f,
1394 size_t hsz, size_t csz, size_t tsz)
1395 {
1396 gaeaddec_pyobj *gd;
1397 assert(cobj); Py_INCREF(cobj);
1398 gd = PyObject_NEW(gaeaddec_pyobj, (PyTypeObject *)cobj);
1399 gd->d = d; gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1400 gd->aad = 0; gd->clen = 0;
1401 return ((PyObject *)gd);
1402 }
1403
1404 static void gaeaddec_pydealloc(PyObject *me)
1405 {
1406 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1407
1408 gaea_sever(&gd->aad); GAEAD_DESTROY(GAEADDEC_D(me));
1409 Py_DECREF(me->ob_type); FREEOBJ(me);
1410 }
1411
1412 static PyObject *gaedget_hsz(PyObject *me, void *hunoz)
1413 {
1414 if (GAEADDEC_F(me)&AEADF_PCHSZ) return getulong(GAEADDEC_HSZ(me));
1415 else RETURN_NONE;
1416 }
1417
1418 static PyObject *gaedget_csz(PyObject *me, void *hunoz)
1419 {
1420 if (GAEADDEC_F(me)&AEADF_PCMSZ) return getulong(GAEADDEC_CSZ(me));
1421 else RETURN_NONE;
1422 }
1423
1424 static PyObject *gaedget_tsz(PyObject *me, void *hunoz)
1425 {
1426 if (GAEADDEC_F(me)&AEADF_PCTSZ) return getulong(GAEADDEC_TSZ(me));
1427 else RETURN_NONE;
1428 }
1429
1430 static PyObject *gaedget_clen(PyObject *me, void *hunoz)
1431 { return getulong(GAEADDEC_CLEN(me)); }
1432
1433 static const PyGetSetDef gaeaddec_pygetset[] = {
1434 #define GETSETNAME(op, name) gaed##op##_##name
1435 GET (hsz, "DEC.hsz -> precommitted header length or `None'")
1436 GET (csz, "DEC.csz -> precommitted ciphertext length or `None'")
1437 GET (tsz, "DEC.tsz -> precommitted tag length or `None'")
1438 GET (clen, "DEC.clen -> ciphertext length so far")
1439 #undef GETSETNAME
1440 { 0 }
1441 };
1442
1443 static PyObject *gaedmeth_aad(PyObject *me)
1444 {
1445 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1446
1447 if (!(gd->f&AEADF_AADNDEP))
1448 return (gaeadaad_pywrap((PyObject *)GCAEADDEC_KEY(gd->ob_type)->aad,
1449 GAEAD_AAD(gd->d), 0, 0));
1450 else {
1451 if (!gd->aad)
1452 gd->aad = (gaeadaad_pyobj *)
1453 gaeadaad_pywrap((PyObject *)GCAEADENC_KEY(gd->ob_type)->aad,
1454 GAEAD_AAD(gd->d), gd->f&(AEADF_PCHSZ | AEADF_NOAAD),
1455 gd->hsz);
1456 Py_INCREF(gd->aad);
1457 return ((PyObject *)gd->aad);
1458 }
1459 }
1460
1461 static PyObject *gaedmeth_reinit(PyObject *me, PyObject *arg, PyObject *kw)
1462 {
1463 static const char *const kwlist[] = { "nonce", "hsz", "csz", "tsz", 0 };
1464 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1465 char *n; Py_ssize_t nsz;
1466 PyObject *hszobj = Py_None, *cszobj = Py_None, *tszobj = Py_None;
1467 size_t hsz = 0, csz = 0, tsz = 0;
1468 unsigned f;
1469
1470 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|OOO:enc", KWLIST,
1471 &n, &nsz, &hszobj, &cszobj, &tszobj))
1472 goto end;
1473 if (check_aead_encdec(gd->d->ops->c, &f, nsz,
1474 hszobj, &hsz, cszobj, &csz, tszobj, &tsz))
1475 goto end;
1476 if (GAEAD_REINIT(gd->d, n, nsz, hsz, csz, tsz))
1477 VALERR("bad aead parameter combination");
1478 gaea_sever(&gd->aad);
1479 gd->f = f; gd->hsz = hsz; gd->csz = csz; gd->tsz = tsz;
1480 end:
1481 return (0);
1482 }
1483
1484 static PyObject *gaedmeth_decrypt(PyObject *me, PyObject *arg)
1485 {
1486 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1487 char *c; Py_ssize_t csz;
1488 char *m = 0; size_t msz; buf b;
1489 int err;
1490 PyObject *rc = 0;
1491
1492 if (!PyArg_ParseTuple(arg, "s#:decrypt", &c, &csz)) goto end;
1493 if (gd->f&AEADF_AADFIRST) {
1494 if ((gd->f&AEADF_PCHSZ) && (gd->aad ? gd->aad->hlen : 0) != gd->hsz)
1495 VALERR("header doesn't match precommitted length");
1496 gaea_invalidate(gd->aad);
1497 }
1498 if ((gd->f&AEADF_PCMSZ) && csz > gd->csz - gd->clen)
1499 VALERR("too large for precommitted message length");
1500 msz = csz + gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1501 err = GAEAD_DECRYPT(gd->d, c, csz, &b); assert(!err); (void)err;
1502 buf_flip(&b); rc = bytestring_pywrapbuf(&b); gd->clen += csz;
1503 end:
1504 xfree(m);
1505 return (rc);
1506 }
1507
1508 static PyObject *gaedmeth_done(PyObject *me, PyObject *arg, PyObject *kw)
1509 {
1510 static const char *const kwlist[] = { "tag", "aad", 0 };
1511 gaeaddec_pyobj *gd = (gaeaddec_pyobj *)me;
1512 PyObject *aad = Py_None;
1513 char *t; Py_ssize_t tsz;
1514 char *m = 0; size_t msz; buf b;
1515 int err;
1516 PyObject *rc = 0;
1517
1518 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O:done", KWLIST,
1519 &t, &tsz, &aad))
1520 goto end;
1521 if (aad != Py_None &&
1522 !PyObject_TypeCheck(aad,
1523 (PyTypeObject *)GCAEADENC_KEY(me->ob_type)->aad))
1524 TYERR("wanted aad");
1525 if ((gd->f&AEADF_AADNDEP) && aad != Py_None && aad != (PyObject *)gd->aad)
1526 VALERR("mismatched aad");
1527 if ((gd->f&AEADF_PCHSZ) &&
1528 (aad == Py_None ? 0 : GAEADAAD_HLEN(aad)) != gd->hsz)
1529 VALERR("header doesn't match precommitted length");
1530 if ((gd->f&AEADF_PCMSZ) && gd->clen != gd->csz)
1531 VALERR("message doesn't match precommitted length");
1532 if ((gd->f&AEADF_PCTSZ) && tsz != gd->tsz)
1533 VALERR("tag length doesn't match precommitted value");
1534 if (keysz(tsz, gd->d->ops->c->tagsz) != tsz) VALERR("bad tag length");
1535 msz = gd->d->ops->c->bufsz; m = xmalloc(msz); buf_init(&b, m, msz);
1536 err = GAEAD_DONE(gd->d, aad == Py_None ? 0 : GAEADAAD_A(aad), &b, t, tsz);
1537 assert(err >= 0);
1538 if (!err) VALERR("decryption failed");
1539 buf_flip(&b); rc = bytestring_pywrapbuf(&b);
1540 end:
1541 xfree(m);
1542 return (rc);
1543 }
1544
1545 static const PyMethodDef gaeaddec_pymethods[] = {
1546 #define METHNAME(name) gaedmeth_##name
1547 NAMETH(aad, "DEC.aad() -> AAD")
1548 KWMETH(reinit, "DEC.reinit(NONCE, [hsz], [csz], [tsz])")
1549 METH (decrypt, "DEC.decrypt(CT) -> MSG")
1550 KWMETH(done, "DEC.done(TAG, [aad]) -> MSG | None")
1551 #undef METHNAME
1552 { 0 }
1553 };
1554
1555 static PyTypeObject gcaead_pytype_skel = {
1556 PyObject_HEAD_INIT(0) 0, /* Header */
1557 "GCAEAD", /* @tp_name@ */
1558 sizeof(gcaead_pyobj), /* @tp_basicsize@ */
1559 0, /* @tp_itemsize@ */
1560
1561 0, /* @tp_dealloc@ */
1562 0, /* @tp_print@ */
1563 0, /* @tp_getattr@ */
1564 0, /* @tp_setattr@ */
1565 0, /* @tp_compare@ */
1566 0, /* @tp_repr@ */
1567 0, /* @tp_as_number@ */
1568 0, /* @tp_as_sequence@ */
1569 0, /* @tp_as_mapping@ */
1570 0, /* @tp_hash@ */
1571 0, /* @tp_call@ */
1572 0, /* @tp_str@ */
1573 0, /* @tp_getattro@ */
1574 0, /* @tp_setattro@ */
1575 0, /* @tp_as_buffer@ */
1576 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1577 Py_TPFLAGS_BASETYPE,
1578
1579 /* @tp_doc@ */
1580 "Authenticated encryption (key) metaclass.",
1581
1582 0, /* @tp_traverse@ */
1583 0, /* @tp_clear@ */
1584 0, /* @tp_richcompare@ */
1585 0, /* @tp_weaklistoffset@ */
1586 0, /* @tp_iter@ */
1587 0, /* @tp_iternext@ */
1588 0, /* @tp_methods@ */
1589 0, /* @tp_members@ */
1590 PYGETSET(gcaead), /* @tp_getset@ */
1591 0, /* @tp_base@ */
1592 0, /* @tp_dict@ */
1593 0, /* @tp_descr_get@ */
1594 0, /* @tp_descr_set@ */
1595 0, /* @tp_dictoffset@ */
1596 0, /* @tp_init@ */
1597 PyType_GenericAlloc, /* @tp_alloc@ */
1598 abstract_pynew, /* @tp_new@ */
1599 0, /* @tp_free@ */
1600 0 /* @tp_is_gc@ */
1601 };
1602
1603 static PyTypeObject gaeadkey_pytype_skel = {
1604 PyObject_HEAD_INIT(0) 0, /* Header */
1605 "GAEKey", /* @tp_name@ */
1606 sizeof(gaeadkey_pyobj), /* @tp_basicsize@ */
1607 0, /* @tp_itemsize@ */
1608
1609 gaeadkey_pydealloc, /* @tp_dealloc@ */
1610 0, /* @tp_print@ */
1611 0, /* @tp_getattr@ */
1612 0, /* @tp_setattr@ */
1613 0, /* @tp_compare@ */
1614 0, /* @tp_repr@ */
1615 0, /* @tp_as_number@ */
1616 0, /* @tp_as_sequence@ */
1617 0, /* @tp_as_mapping@ */
1618 0, /* @tp_hash@ */
1619 0, /* @tp_call@ */
1620 0, /* @tp_str@ */
1621 0, /* @tp_getattro@ */
1622 0, /* @tp_setattro@ */
1623 0, /* @tp_as_buffer@ */
1624 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1625 Py_TPFLAGS_BASETYPE,
1626
1627 /* @tp_doc@ */
1628 "Authenticated encryption key.",
1629
1630 0, /* @tp_traverse@ */
1631 0, /* @tp_clear@ */
1632 0, /* @tp_richcompare@ */
1633 0, /* @tp_weaklistoffset@ */
1634 0, /* @tp_iter@ */
1635 0, /* @tp_iternext@ */
1636 PYMETHODS(gaeadkey), /* @tp_methods@ */
1637 0, /* @tp_members@ */
1638 0, /* @tp_getset@ */
1639 0, /* @tp_base@ */
1640 0, /* @tp_dict@ */
1641 0, /* @tp_descr_get@ */
1642 0, /* @tp_descr_set@ */
1643 0, /* @tp_dictoffset@ */
1644 0, /* @tp_init@ */
1645 PyType_GenericAlloc, /* @tp_alloc@ */
1646 abstract_pynew, /* @tp_new@ */
1647 0, /* @tp_free@ */
1648 0 /* @tp_is_gc@ */
1649 };
1650
1651 static PyTypeObject gcaeadaad_pytype_skel = {
1652 PyObject_HEAD_INIT(0) 0, /* Header */
1653 "GAEAADClass", /* @tp_name@ */
1654 sizeof(gcaeadaad_pyobj), /* @tp_basicsize@ */
1655 0, /* @tp_itemsize@ */
1656
1657 0, /* @tp_dealloc@ */
1658 0, /* @tp_print@ */
1659 0, /* @tp_getattr@ */
1660 0, /* @tp_setattr@ */
1661 0, /* @tp_compare@ */
1662 0, /* @tp_repr@ */
1663 0, /* @tp_as_number@ */
1664 0, /* @tp_as_sequence@ */
1665 0, /* @tp_as_mapping@ */
1666 0, /* @tp_hash@ */
1667 0, /* @tp_call@ */
1668 0, /* @tp_str@ */
1669 0, /* @tp_getattro@ */
1670 0, /* @tp_setattro@ */
1671 0, /* @tp_as_buffer@ */
1672 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1673 Py_TPFLAGS_BASETYPE,
1674
1675 /* @tp_doc@ */
1676 "Authenticated encryption additional-data hash metaclass.",
1677
1678 0, /* @tp_traverse@ */
1679 0, /* @tp_clear@ */
1680 0, /* @tp_richcompare@ */
1681 0, /* @tp_weaklistoffset@ */
1682 0, /* @tp_iter@ */
1683 0, /* @tp_iternext@ */
1684 0, /* @tp_methods@ */
1685 0, /* @tp_members@ */
1686 0, /* @tp_getset@ */
1687 0, /* @tp_base@ */
1688 0, /* @tp_dict@ */
1689 0, /* @tp_descr_get@ */
1690 0, /* @tp_descr_set@ */
1691 0, /* @tp_dictoffset@ */
1692 0, /* @tp_init@ */
1693 PyType_GenericAlloc, /* @tp_alloc@ */
1694 abstract_pynew, /* @tp_new@ */
1695 0, /* @tp_free@ */
1696 0 /* @tp_is_gc@ */
1697 };
1698
1699 static PyTypeObject gaeadaad_pytype_skel = {
1700 PyObject_HEAD_INIT(0) 0, /* Header */
1701 "GAEAAD", /* @tp_name@ */
1702 sizeof(gaeadaad_pyobj), /* @tp_basicsize@ */
1703 0, /* @tp_itemsize@ */
1704
1705 gaeadaad_pydealloc, /* @tp_dealloc@ */
1706 0, /* @tp_print@ */
1707 0, /* @tp_getattr@ */
1708 0, /* @tp_setattr@ */
1709 0, /* @tp_compare@ */
1710 0, /* @tp_repr@ */
1711 0, /* @tp_as_number@ */
1712 0, /* @tp_as_sequence@ */
1713 0, /* @tp_as_mapping@ */
1714 0, /* @tp_hash@ */
1715 0, /* @tp_call@ */
1716 0, /* @tp_str@ */
1717 0, /* @tp_getattro@ */
1718 0, /* @tp_setattro@ */
1719 0, /* @tp_as_buffer@ */
1720 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1721 Py_TPFLAGS_BASETYPE,
1722
1723 /* @tp_doc@ */
1724 "Authenticated encryption AAD hash.",
1725
1726 0, /* @tp_traverse@ */
1727 0, /* @tp_clear@ */
1728 0, /* @tp_richcompare@ */
1729 0, /* @tp_weaklistoffset@ */
1730 0, /* @tp_iter@ */
1731 0, /* @tp_iternext@ */
1732 PYMETHODS(gaeadaad), /* @tp_methods@ */
1733 0, /* @tp_members@ */
1734 PYGETSET(gaeadaad), /* @tp_getset@ */
1735 0, /* @tp_base@ */
1736 0, /* @tp_dict@ */
1737 0, /* @tp_descr_get@ */
1738 0, /* @tp_descr_set@ */
1739 0, /* @tp_dictoffset@ */
1740 0, /* @tp_init@ */
1741 PyType_GenericAlloc, /* @tp_alloc@ */
1742 abstract_pynew, /* @tp_new@ */
1743 0, /* @tp_free@ */
1744 0 /* @tp_is_gc@ */
1745 };
1746
1747 static PyTypeObject gcaeadenc_pytype_skel = {
1748 PyObject_HEAD_INIT(0) 0, /* Header */
1749 "GAEEncClass", /* @tp_name@ */
1750 sizeof(gcaeadenc_pyobj), /* @tp_basicsize@ */
1751 0, /* @tp_itemsize@ */
1752
1753 0, /* @tp_dealloc@ */
1754 0, /* @tp_print@ */
1755 0, /* @tp_getattr@ */
1756 0, /* @tp_setattr@ */
1757 0, /* @tp_compare@ */
1758 0, /* @tp_repr@ */
1759 0, /* @tp_as_number@ */
1760 0, /* @tp_as_sequence@ */
1761 0, /* @tp_as_mapping@ */
1762 0, /* @tp_hash@ */
1763 0, /* @tp_call@ */
1764 0, /* @tp_str@ */
1765 0, /* @tp_getattro@ */
1766 0, /* @tp_setattro@ */
1767 0, /* @tp_as_buffer@ */
1768 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1769 Py_TPFLAGS_BASETYPE,
1770
1771 /* @tp_doc@ */
1772 "Authenticated encryption operation metaclass.",
1773
1774 0, /* @tp_traverse@ */
1775 0, /* @tp_clear@ */
1776 0, /* @tp_richcompare@ */
1777 0, /* @tp_weaklistoffset@ */
1778 0, /* @tp_iter@ */
1779 0, /* @tp_iternext@ */
1780 0, /* @tp_methods@ */
1781 0, /* @tp_members@ */
1782 0, /* @tp_getset@ */
1783 0, /* @tp_base@ */
1784 0, /* @tp_dict@ */
1785 0, /* @tp_descr_get@ */
1786 0, /* @tp_descr_set@ */
1787 0, /* @tp_dictoffset@ */
1788 0, /* @tp_init@ */
1789 PyType_GenericAlloc, /* @tp_alloc@ */
1790 abstract_pynew, /* @tp_new@ */
1791 0, /* @tp_free@ */
1792 0 /* @tp_is_gc@ */
1793 };
1794
1795 static PyTypeObject gaeadenc_pytype_skel = {
1796 PyObject_HEAD_INIT(0) 0, /* Header */
1797 "GAEEnc", /* @tp_name@ */
1798 sizeof(gaeadenc_pyobj), /* @tp_basicsize@ */
1799 0, /* @tp_itemsize@ */
1800
1801 gaeadenc_pydealloc, /* @tp_dealloc@ */
1802 0, /* @tp_print@ */
1803 0, /* @tp_getattr@ */
1804 0, /* @tp_setattr@ */
1805 0, /* @tp_compare@ */
1806 0, /* @tp_repr@ */
1807 0, /* @tp_as_number@ */
1808 0, /* @tp_as_sequence@ */
1809 0, /* @tp_as_mapping@ */
1810 0, /* @tp_hash@ */
1811 0, /* @tp_call@ */
1812 0, /* @tp_str@ */
1813 0, /* @tp_getattro@ */
1814 0, /* @tp_setattro@ */
1815 0, /* @tp_as_buffer@ */
1816 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1817 Py_TPFLAGS_BASETYPE,
1818
1819 /* @tp_doc@ */
1820 "Authenticated encryption operation.",
1821
1822 0, /* @tp_traverse@ */
1823 0, /* @tp_clear@ */
1824 0, /* @tp_richcompare@ */
1825 0, /* @tp_weaklistoffset@ */
1826 0, /* @tp_iter@ */
1827 0, /* @tp_iternext@ */
1828 PYMETHODS(gaeadenc), /* @tp_methods@ */
1829 0, /* @tp_members@ */
1830 PYGETSET(gaeadenc), /* @tp_getset@ */
1831 0, /* @tp_base@ */
1832 0, /* @tp_dict@ */
1833 0, /* @tp_descr_get@ */
1834 0, /* @tp_descr_set@ */
1835 0, /* @tp_dictoffset@ */
1836 0, /* @tp_init@ */
1837 PyType_GenericAlloc, /* @tp_alloc@ */
1838 abstract_pynew, /* @tp_new@ */
1839 0, /* @tp_free@ */
1840 0 /* @tp_is_gc@ */
1841 };
1842
1843 static PyTypeObject gcaeaddec_pytype_skel = {
1844 PyObject_HEAD_INIT(0) 0, /* Header */
1845 "GAEDecClass", /* @tp_name@ */
1846 sizeof(gcaeaddec_pyobj), /* @tp_basicsize@ */
1847 0, /* @tp_itemsize@ */
1848
1849 0, /* @tp_dealloc@ */
1850 0, /* @tp_print@ */
1851 0, /* @tp_getattr@ */
1852 0, /* @tp_setattr@ */
1853 0, /* @tp_compare@ */
1854 0, /* @tp_repr@ */
1855 0, /* @tp_as_number@ */
1856 0, /* @tp_as_sequence@ */
1857 0, /* @tp_as_mapping@ */
1858 0, /* @tp_hash@ */
1859 0, /* @tp_call@ */
1860 0, /* @tp_str@ */
1861 0, /* @tp_getattro@ */
1862 0, /* @tp_setattro@ */
1863 0, /* @tp_as_buffer@ */
1864 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1865 Py_TPFLAGS_BASETYPE,
1866
1867 /* @tp_doc@ */
1868 "Authenticated decryption operation metaclass.",
1869
1870 0, /* @tp_traverse@ */
1871 0, /* @tp_clear@ */
1872 0, /* @tp_richcompare@ */
1873 0, /* @tp_weaklistoffset@ */
1874 0, /* @tp_iter@ */
1875 0, /* @tp_iternext@ */
1876 0, /* @tp_methods@ */
1877 0, /* @tp_members@ */
1878 0, /* @tp_getset@ */
1879 0, /* @tp_base@ */
1880 0, /* @tp_dict@ */
1881 0, /* @tp_descr_get@ */
1882 0, /* @tp_descr_set@ */
1883 0, /* @tp_dictoffset@ */
1884 0, /* @tp_init@ */
1885 PyType_GenericAlloc, /* @tp_alloc@ */
1886 abstract_pynew, /* @tp_new@ */
1887 0, /* @tp_free@ */
1888 0 /* @tp_is_gc@ */
1889 };
1890
1891 static PyTypeObject gaeaddec_pytype_skel = {
1892 PyObject_HEAD_INIT(0) 0, /* Header */
1893 "GAEDec", /* @tp_name@ */
1894 sizeof(gaeaddec_pyobj), /* @tp_basicsize@ */
1895 0, /* @tp_itemsize@ */
1896
1897 gaeaddec_pydealloc, /* @tp_dealloc@ */
1898 0, /* @tp_print@ */
1899 0, /* @tp_getattr@ */
1900 0, /* @tp_setattr@ */
1901 0, /* @tp_compare@ */
1902 0, /* @tp_repr@ */
1903 0, /* @tp_as_number@ */
1904 0, /* @tp_as_sequence@ */
1905 0, /* @tp_as_mapping@ */
1906 0, /* @tp_hash@ */
1907 0, /* @tp_call@ */
1908 0, /* @tp_str@ */
1909 0, /* @tp_getattro@ */
1910 0, /* @tp_setattro@ */
1911 0, /* @tp_as_buffer@ */
1912 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
1913 Py_TPFLAGS_BASETYPE,
1914
1915 /* @tp_doc@ */
1916 "Authenticated decryption operation.",
1917
1918 0, /* @tp_traverse@ */
1919 0, /* @tp_clear@ */
1920 0, /* @tp_richcompare@ */
1921 0, /* @tp_weaklistoffset@ */
1922 0, /* @tp_iter@ */
1923 0, /* @tp_iternext@ */
1924 PYMETHODS(gaeaddec), /* @tp_methods@ */
1925 0, /* @tp_members@ */
1926 PYGETSET(gaeaddec), /* @tp_getset@ */
1927 0, /* @tp_base@ */
1928 0, /* @tp_dict@ */
1929 0, /* @tp_descr_get@ */
1930 0, /* @tp_descr_set@ */
1931 0, /* @tp_dictoffset@ */
1932 0, /* @tp_init@ */
1933 PyType_GenericAlloc, /* @tp_alloc@ */
1934 abstract_pynew, /* @tp_new@ */
1935 0, /* @tp_free@ */
1936 0 /* @tp_is_gc@ */
1937 };
1938
1939 /*----- Hash functions ----------------------------------------------------*/
1940
1941 PyTypeObject *gchash_pytype;
1942 static PyTypeObject *ghash_pytype;
1943 PyObject *sha_pyobj, *has160_pyobj;
1944
1945 typedef struct ghash_pyobj {
1946 PyObject_HEAD
1947 ghash *h;
1948 } ghash_pyobj;
1949
1950 #define GHASH_PYCHECK(o) PyObject_TypeCheck((o), ghash_pytype)
1951 #define GHASH_H(o) (((ghash_pyobj *)(o))->h)
1952
1953 CONVFUNC(gchash, gchash *, GCHASH_CH)
1954 CONVFUNC(ghash, ghash *, GHASH_H)
1955
1956 static PyObject *ghash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
1957 {
1958 static const char *const kwlist[] = { 0 };
1959 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST))
1960 goto end;
1961 return (ghash_pywrap((PyObject *)ty, GH_INIT(GCHASH_CH(ty))));
1962 end:
1963 return (0);
1964 }
1965
1966 static PyObject *gchash_pywrap(gchash *ch)
1967 {
1968 gchash_pyobj *g = newtype(gchash_pytype, 0, ch->name);
1969 g->ch = ch;
1970 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
1971 g->ty.ht_type.tp_base = ghash_pytype;
1972 Py_INCREF(ghash_pytype);
1973 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
1974 Py_TPFLAGS_BASETYPE |
1975 Py_TPFLAGS_HEAPTYPE);
1976 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
1977 g->ty.ht_type.tp_free = 0;
1978 g->ty.ht_type.tp_new = ghash_pynew;
1979 typeready(&g->ty.ht_type);
1980 return ((PyObject *)g);
1981 }
1982
1983 PyObject *ghash_pywrap(PyObject *cobj, ghash *h)
1984 {
1985 ghash_pyobj *g;
1986 if (!cobj) cobj = gchash_pywrap((/*unconst*/ gchash *)GH_CLASS(h));
1987 else Py_INCREF(cobj);
1988 g = PyObject_NEW(ghash_pyobj, (PyTypeObject *)cobj);
1989 g->h = h;
1990 return ((PyObject *)g);
1991 }
1992
1993 static void ghash_pydealloc(PyObject *me)
1994 {
1995 GH_DESTROY(GHASH_H(me));
1996 Py_DECREF(me->ob_type);
1997 FREEOBJ(me);
1998 }
1999
2000 static PyObject *gchget_name(PyObject *me, void *hunoz)
2001 { return (PyString_FromString(GCHASH_CH(me)->name)); }
2002
2003 static PyObject *gchget_hashsz(PyObject *me, void *hunoz)
2004 { return (PyInt_FromLong(GCHASH_CH(me)->hashsz)); }
2005
2006 static PyObject *gchget_bufsz(PyObject *me, void *hunoz)
2007 { return (PyInt_FromLong(GCHASH_CH(me)->bufsz)); }
2008
2009 static PyObject *ghmeth_copy(PyObject *me)
2010 { return (ghash_pywrap((PyObject *)me->ob_type, GH_COPY(GHASH_H(me)))); }
2011
2012 static PyObject *ghmeth_hash(PyObject *me, PyObject *arg)
2013 {
2014 char *p;
2015 Py_ssize_t sz;
2016 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2017 GH_HASH(GHASH_H(me), p, sz);
2018 RETURN_ME;
2019 }
2020
2021 #define GHMETH_HASHU_(n, W, w) \
2022 static PyObject *ghmeth_hashu##w(PyObject *me, PyObject *arg) \
2023 { \
2024 uint##n x; \
2025 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2026 GH_HASHU##W(GHASH_H(me), x); \
2027 RETURN_ME; \
2028 }
2029 DOUINTCONV(GHMETH_HASHU_)
2030
2031 #define GHMETH_HASHBUF_(n, W, w) \
2032 static PyObject *ghmeth_hashbuf##w(PyObject *me, PyObject *arg) \
2033 { \
2034 char *p; \
2035 Py_ssize_t sz; \
2036 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2037 if (sz > MASK##n) TYERR("string too long"); \
2038 GH_HASHBUF##W(GHASH_H(me), p, sz); \
2039 RETURN_ME; \
2040 end: \
2041 return (0); \
2042 }
2043 DOUINTCONV(GHMETH_HASHBUF_)
2044
2045 static PyObject *ghmeth_hashstrz(PyObject *me, PyObject *arg)
2046 {
2047 char *p;
2048 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2049 GH_HASHSTRZ(GHASH_H(me), p);
2050 RETURN_ME;
2051 }
2052
2053 static PyObject *ghmeth_done(PyObject *me)
2054 {
2055 ghash *g;
2056 PyObject *rc;
2057 g = GH_COPY(GHASH_H(me));
2058 rc = bytestring_pywrap(0, g->ops->c->hashsz);
2059 GH_DONE(g, PyString_AS_STRING(rc));
2060 GH_DESTROY(g);
2061 return (rc);
2062 }
2063
2064 static const PyGetSetDef gchash_pygetset[] = {
2065 #define GETSETNAME(op, name) gch##op##_##name
2066 GET (bufsz, "CH.bufsz -> hash buffer size, or zero")
2067 GET (hashsz, "CH.hashsz -> hash output size")
2068 GET (name, "CH.name -> name of this kind of hash")
2069 #undef GETSETNAME
2070 { 0 }
2071 };
2072
2073 static const PyMethodDef ghash_pymethods[] = {
2074 #define METHNAME(name) ghmeth_##name
2075 NAMETH(copy, "H.copy() -> HH")
2076 METH (hash, "H.hash(M)")
2077 #define METHU_(n, W, w) METH(hashu##w, "H.hashu" #w "(WORD)")
2078 DOUINTCONV(METHU_)
2079 #undef METHU_
2080 #define METHBUF_(n, W, w) METH(hashbuf##w, "H.hashbuf" #w "(BYTES)")
2081 DOUINTCONV(METHBUF_)
2082 #undef METHBUF_
2083 METH (hashstrz, "H.hashstrz(STRING)")
2084 NAMETH(done, "H.done() -> HASH")
2085 #undef METHNAME
2086 { 0 }
2087 };
2088
2089 static PyTypeObject gchash_pytype_skel = {
2090 PyObject_HEAD_INIT(0) 0, /* Header */
2091 "GCHash", /* @tp_name@ */
2092 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2093 0, /* @tp_itemsize@ */
2094
2095 0, /* @tp_dealloc@ */
2096 0, /* @tp_print@ */
2097 0, /* @tp_getattr@ */
2098 0, /* @tp_setattr@ */
2099 0, /* @tp_compare@ */
2100 0, /* @tp_repr@ */
2101 0, /* @tp_as_number@ */
2102 0, /* @tp_as_sequence@ */
2103 0, /* @tp_as_mapping@ */
2104 0, /* @tp_hash@ */
2105 0, /* @tp_call@ */
2106 0, /* @tp_str@ */
2107 0, /* @tp_getattro@ */
2108 0, /* @tp_setattro@ */
2109 0, /* @tp_as_buffer@ */
2110 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2111 Py_TPFLAGS_BASETYPE,
2112
2113 /* @tp_doc@ */
2114 "Hash function metaclass.",
2115
2116 0, /* @tp_traverse@ */
2117 0, /* @tp_clear@ */
2118 0, /* @tp_richcompare@ */
2119 0, /* @tp_weaklistoffset@ */
2120 0, /* @tp_iter@ */
2121 0, /* @tp_iternext@ */
2122 0, /* @tp_methods@ */
2123 0, /* @tp_members@ */
2124 PYGETSET(gchash), /* @tp_getset@ */
2125 0, /* @tp_base@ */
2126 0, /* @tp_dict@ */
2127 0, /* @tp_descr_get@ */
2128 0, /* @tp_descr_set@ */
2129 0, /* @tp_dictoffset@ */
2130 0, /* @tp_init@ */
2131 PyType_GenericAlloc, /* @tp_alloc@ */
2132 abstract_pynew, /* @tp_new@ */
2133 0, /* @tp_free@ */
2134 0 /* @tp_is_gc@ */
2135 };
2136
2137 static PyTypeObject ghash_pytype_skel = {
2138 PyObject_HEAD_INIT(0) 0, /* Header */
2139 "GHash", /* @tp_name@ */
2140 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2141 0, /* @tp_itemsize@ */
2142
2143 ghash_pydealloc, /* @tp_dealloc@ */
2144 0, /* @tp_print@ */
2145 0, /* @tp_getattr@ */
2146 0, /* @tp_setattr@ */
2147 0, /* @tp_compare@ */
2148 0, /* @tp_repr@ */
2149 0, /* @tp_as_number@ */
2150 0, /* @tp_as_sequence@ */
2151 0, /* @tp_as_mapping@ */
2152 0, /* @tp_hash@ */
2153 0, /* @tp_call@ */
2154 0, /* @tp_str@ */
2155 0, /* @tp_getattro@ */
2156 0, /* @tp_setattro@ */
2157 0, /* @tp_as_buffer@ */
2158 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2159 Py_TPFLAGS_BASETYPE,
2160
2161 /* @tp_doc@ */
2162 "Hash function, abstract base class.",
2163
2164 0, /* @tp_traverse@ */
2165 0, /* @tp_clear@ */
2166 0, /* @tp_richcompare@ */
2167 0, /* @tp_weaklistoffset@ */
2168 0, /* @tp_iter@ */
2169 0, /* @tp_iternext@ */
2170 PYMETHODS(ghash), /* @tp_methods@ */
2171 0, /* @tp_members@ */
2172 0, /* @tp_getset@ */
2173 0, /* @tp_base@ */
2174 0, /* @tp_dict@ */
2175 0, /* @tp_descr_get@ */
2176 0, /* @tp_descr_set@ */
2177 0, /* @tp_dictoffset@ */
2178 0, /* @tp_init@ */
2179 PyType_GenericAlloc, /* @tp_alloc@ */
2180 abstract_pynew, /* @tp_new@ */
2181 0, /* @tp_free@ */
2182 0 /* @tp_is_gc@ */
2183 };
2184
2185 /*----- Message authentication --------------------------------------------*/
2186
2187 static PyTypeObject *gcmac_pytype, *gmac_pytype, *gmhash_pytype;
2188
2189 typedef struct gcmac_pyobj {
2190 PyHeapTypeObject ty;
2191 gcmac *cm;
2192 } gcmac_pyobj;
2193
2194 #define GCMAC_PYCHECK(o) PyObject_TypeCheck((o), gcmac_pytype)
2195 #define GCMAC_CM(o) (((gcmac_pyobj *)(o))->cm)
2196 #define GCMAC_F(o) (((gcmac_pyobj *)(o))->f)
2197 CONVFUNC(gcmac, gcmac *, GCMAC_CM)
2198 static PyObject *gmac_pywrap(PyObject *, gmac *);
2199
2200 typedef struct gmac_pyobj {
2201 PyHeapTypeObject ty;
2202 gmac *m;
2203 } gmac_pyobj;
2204
2205 extern PyTypeObject *gmac_pytype;
2206 #define GMAC_PYCHECK(o) PyObject_TypeCheck((o), gmac_pytype)
2207 #define GMAC_M(o) (((gmac_pyobj *)(o))->m)
2208 #define GMAC_F(o) (((gmac_pyobj *)(o))->f)
2209 extern PyObject *gmac_pywrap(PyObject *, gmac *);
2210 extern int convgmac(PyObject *, void *);
2211
2212 static PyObject *gmac_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2213 {
2214 static const char *const kwlist[] = { "k", 0 };
2215 char *k;
2216 Py_ssize_t sz;
2217
2218 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2219 goto end;
2220 if (keysz(sz, GCMAC_CM(ty)->keysz) != sz) VALERR("bad key length");
2221 return (gmac_pywrap((PyObject *)ty,
2222 GM_KEY(GCMAC_CM(ty), k, sz)));
2223 end:
2224 return (0);
2225 }
2226
2227 static PyObject *gmhash_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2228 {
2229 static const char *const kwlist[] = { 0 };
2230 ghash_pyobj *g;
2231
2232 if (!PyArg_ParseTupleAndKeywords(arg, kw, ":new", KWLIST)) return (0);
2233 g = PyObject_NEW(ghash_pyobj, ty);
2234 g->h = GM_INIT(GMAC_M(ty));
2235 Py_INCREF(ty);
2236 return ((PyObject *)g);
2237 }
2238
2239 static PyObject *gcmac_pywrap(gcmac *cm)
2240 {
2241 gcmac_pyobj *g = newtype(gcmac_pytype, 0, cm->name);
2242 g->cm = cm;
2243 g->ty.ht_type.tp_basicsize = sizeof(gmac_pyobj);
2244 g->ty.ht_type.tp_base = gmac_pytype;
2245 Py_INCREF(gmac_pytype);
2246 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2247 Py_TPFLAGS_BASETYPE |
2248 Py_TPFLAGS_HEAPTYPE);
2249 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2250 g->ty.ht_type.tp_free = 0;
2251 g->ty.ht_type.tp_new = gmac_pynew;
2252 typeready(&g->ty.ht_type);
2253 return ((PyObject *)g);
2254 }
2255
2256 static PyObject *gmac_pywrap(PyObject *cobj, gmac *m)
2257 {
2258 gmac_pyobj *g;
2259 if (!cobj) cobj = gcmac_pywrap((/*unconst*/ gcmac *)GM_CLASS(m));
2260 else Py_INCREF(cobj);
2261 g = newtype((PyTypeObject *)cobj, 0, 0);
2262 g->ty.ht_type.tp_basicsize = sizeof(ghash_pyobj);
2263 g->ty.ht_name = PyString_FromFormat("%s(keyed)", m->ops->c->name);
2264 g->ty.ht_type.tp_name = PyString_AS_STRING(g->ty.ht_name);
2265 g->ty.ht_type.tp_base = gmhash_pytype;
2266 Py_INCREF(gmac_pytype);
2267 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2268 Py_TPFLAGS_BASETYPE |
2269 Py_TPFLAGS_HEAPTYPE);
2270 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2271 g->ty.ht_type.tp_free = 0;
2272 g->ty.ht_type.tp_new = gmhash_pynew;
2273 typeready(&g->ty.ht_type);
2274 g->m = m;
2275 return ((PyObject *)g);
2276 }
2277
2278 static void gmac_pydealloc(PyObject *me)
2279 {
2280 GM_DESTROY(GMAC_M(me));
2281 Py_DECREF(me->ob_type);
2282 PyType_Type.tp_dealloc(me);
2283 }
2284
2285 static PyObject *gcmget_name(PyObject *me, void *hunoz)
2286 { return (PyString_FromString(GCMAC_CM(me)->name)); }
2287
2288 static PyObject *gcmget_keysz(PyObject *me, void *hunoz)
2289 { return (keysz_pywrap(GCMAC_CM(me)->keysz)); }
2290
2291 static PyObject *gcmget_tagsz(PyObject *me, void *hunoz)
2292 { return (PyInt_FromLong(GCMAC_CM(me)->hashsz)); }
2293
2294 static const PyGetSetDef gcmac_pygetset[] = {
2295 #define GETSETNAME(op, name) gcm##op##_##name
2296 GET (keysz, "CM.keysz -> acceptable key sizes")
2297 GET (tagsz, "CM.tagsz -> MAC output size")
2298 GET (name, "CM.name -> name of this kind of MAC")
2299 #undef GETSETNAME
2300 { 0 }
2301 };
2302
2303 static PyTypeObject gcmac_pytype_skel = {
2304 PyObject_HEAD_INIT(0) 0, /* Header */
2305 "GCMAC", /* @tp_name@ */
2306 sizeof(gchash_pyobj), /* @tp_basicsize@ */
2307 0, /* @tp_itemsize@ */
2308
2309 0, /* @tp_dealloc@ */
2310 0, /* @tp_print@ */
2311 0, /* @tp_getattr@ */
2312 0, /* @tp_setattr@ */
2313 0, /* @tp_compare@ */
2314 0, /* @tp_repr@ */
2315 0, /* @tp_as_number@ */
2316 0, /* @tp_as_sequence@ */
2317 0, /* @tp_as_mapping@ */
2318 0, /* @tp_hash@ */
2319 0, /* @tp_call@ */
2320 0, /* @tp_str@ */
2321 0, /* @tp_getattro@ */
2322 0, /* @tp_setattro@ */
2323 0, /* @tp_as_buffer@ */
2324 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2325 Py_TPFLAGS_BASETYPE,
2326
2327 /* @tp_doc@ */
2328 "Message authentication code metametaclass.",
2329
2330 0, /* @tp_traverse@ */
2331 0, /* @tp_clear@ */
2332 0, /* @tp_richcompare@ */
2333 0, /* @tp_weaklistoffset@ */
2334 0, /* @tp_iter@ */
2335 0, /* @tp_iternext@ */
2336 0, /* @tp_methods@ */
2337 0, /* @tp_members@ */
2338 PYGETSET(gcmac), /* @tp_getset@ */
2339 0, /* @tp_base@ */
2340 0, /* @tp_dict@ */
2341 0, /* @tp_descr_get@ */
2342 0, /* @tp_descr_set@ */
2343 0, /* @tp_dictoffset@ */
2344 0, /* @tp_init@ */
2345 PyType_GenericAlloc, /* @tp_alloc@ */
2346 abstract_pynew, /* @tp_new@ */
2347 0, /* @tp_free@ */
2348 0 /* @tp_is_gc@ */
2349 };
2350
2351 static PyTypeObject gmac_pytype_skel = {
2352 PyObject_HEAD_INIT(0) 0, /* Header */
2353 "GMAC", /* @tp_name@ */
2354 sizeof(gmac_pyobj), /* @tp_basicsize@ */
2355 0, /* @tp_itemsize@ */
2356
2357 gmac_pydealloc, /* @tp_dealloc@ */
2358 0, /* @tp_print@ */
2359 0, /* @tp_getattr@ */
2360 0, /* @tp_setattr@ */
2361 0, /* @tp_compare@ */
2362 0, /* @tp_repr@ */
2363 0, /* @tp_as_number@ */
2364 0, /* @tp_as_sequence@ */
2365 0, /* @tp_as_mapping@ */
2366 0, /* @tp_hash@ */
2367 0, /* @tp_call@ */
2368 0, /* @tp_str@ */
2369 0, /* @tp_getattro@ */
2370 0, /* @tp_setattro@ */
2371 0, /* @tp_as_buffer@ */
2372 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2373 Py_TPFLAGS_BASETYPE,
2374
2375 /* @tp_doc@ */
2376 "Message authentication code metaclass, abstract base class.",
2377
2378 0, /* @tp_traverse@ */
2379 0, /* @tp_clear@ */
2380 0, /* @tp_richcompare@ */
2381 0, /* @tp_weaklistoffset@ */
2382 0, /* @tp_iter@ */
2383 0, /* @tp_iternext@ */
2384 0, /* @tp_methods@ */
2385 0, /* @tp_members@ */
2386 0, /* @tp_getset@ */
2387 0, /* @tp_base@ */
2388 0, /* @tp_dict@ */
2389 0, /* @tp_descr_get@ */
2390 0, /* @tp_descr_set@ */
2391 0, /* @tp_dictoffset@ */
2392 0, /* @tp_init@ */
2393 PyType_GenericAlloc, /* @tp_alloc@ */
2394 abstract_pynew, /* @tp_new@ */
2395 0, /* @tp_free@ */
2396 0 /* @tp_is_gc@ */
2397 };
2398
2399 static PyTypeObject gmhash_pytype_skel = {
2400 PyObject_HEAD_INIT(0) 0, /* Header */
2401 "GMACHash", /* @tp_name@ */
2402 sizeof(ghash_pyobj), /* @tp_basicsize@ */
2403 0, /* @tp_itemsize@ */
2404
2405 ghash_pydealloc, /* @tp_dealloc@ */
2406 0, /* @tp_print@ */
2407 0, /* @tp_getattr@ */
2408 0, /* @tp_setattr@ */
2409 0, /* @tp_compare@ */
2410 0, /* @tp_repr@ */
2411 0, /* @tp_as_number@ */
2412 0, /* @tp_as_sequence@ */
2413 0, /* @tp_as_mapping@ */
2414 0, /* @tp_hash@ */
2415 0, /* @tp_call@ */
2416 0, /* @tp_str@ */
2417 0, /* @tp_getattro@ */
2418 0, /* @tp_setattro@ */
2419 0, /* @tp_as_buffer@ */
2420 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2421 Py_TPFLAGS_BASETYPE,
2422
2423 /* @tp_doc@ */
2424 "Message authentication code, abstract base class.",
2425
2426 0, /* @tp_traverse@ */
2427 0, /* @tp_clear@ */
2428 0, /* @tp_richcompare@ */
2429 0, /* @tp_weaklistoffset@ */
2430 0, /* @tp_iter@ */
2431 0, /* @tp_iternext@ */
2432 0, /* @tp_methods@ */
2433 0, /* @tp_members@ */
2434 0, /* @tp_getset@ */
2435 0, /* @tp_base@ */
2436 0, /* @tp_dict@ */
2437 0, /* @tp_descr_get@ */
2438 0, /* @tp_descr_set@ */
2439 0, /* @tp_dictoffset@ */
2440 0, /* @tp_init@ */
2441 PyType_GenericAlloc, /* @tp_alloc@ */
2442 abstract_pynew, /* @tp_new@ */
2443 0, /* @tp_free@ */
2444 0 /* @tp_is_gc@ */
2445 };
2446
2447 /*----- Special snowflake for Poly1305 ------------------------------------*/
2448
2449 PyTypeObject *poly1305cls_pytype, *poly1305key_pytype, *poly1305hash_pytype;
2450
2451 typedef struct poly1305key_pyobj {
2452 PyHeapTypeObject ty;
2453 poly1305_key k;
2454 } poly1305key_pyobj;
2455
2456 typedef struct poly1305hash_pyobj {
2457 PyObject_HEAD
2458 unsigned f;
2459 #define f_mask 1u
2460 poly1305_ctx ctx;
2461 } poly1305hash_pyobj;
2462
2463 #define P1305_F(o) (((poly1305hash_pyobj *)(o))->f)
2464 #define P1305_CTX(o) (&((poly1305hash_pyobj *)(o))->ctx)
2465 CONVFUNC(poly1305hash, poly1305_ctx *, P1305_CTX)
2466
2467 static PyObject *poly1305hash_pynew(PyTypeObject *ty,
2468 PyObject *arg, PyObject *kw)
2469 {
2470 static const char *const kwlist[] = { "mask", 0 };
2471 poly1305key_pyobj *pk = (poly1305key_pyobj *)ty;
2472 poly1305hash_pyobj *ph;
2473 char *m = 0;
2474 Py_ssize_t sz;
2475
2476 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#:new", KWLIST, &m, &sz))
2477 return (0);
2478 if (m && sz != POLY1305_MASKSZ) VALERR("bad mask length");
2479 ph = PyObject_NEW(poly1305hash_pyobj, ty);
2480 ph->f = 0;
2481 if (m) ph->f |= f_mask;
2482 poly1305_macinit(&ph->ctx, &pk->k, m);
2483 Py_INCREF(ty);
2484 return ((PyObject *)ph);
2485 end:
2486 return (0);
2487 }
2488
2489 static PyObject *poly1305key_pynew(PyTypeObject *ty,
2490 PyObject *arg, PyObject *kw)
2491 {
2492 static const char *const kwlist[] = { "k", 0 };
2493 poly1305key_pyobj *pk;
2494 char *k;
2495 Py_ssize_t sz;
2496
2497 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
2498 goto end;
2499 if (keysz(sz, poly1305_keysz) != sz) VALERR("bad key length");
2500
2501 pk = newtype(ty, 0, 0);
2502 pk->ty.ht_name = PyString_FromString("poly1305(keyed)");
2503 pk->ty.ht_type.tp_basicsize = sizeof(poly1305hash_pyobj);
2504 pk->ty.ht_type.tp_name = PyString_AS_STRING(pk->ty.ht_name);
2505 pk->ty.ht_type.tp_base = poly1305hash_pytype;
2506 Py_INCREF(poly1305key_pytype);
2507 pk->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
2508 Py_TPFLAGS_BASETYPE |
2509 Py_TPFLAGS_HEAPTYPE);
2510 pk->ty.ht_type.tp_alloc = PyType_GenericAlloc;
2511 pk->ty.ht_type.tp_free = 0;
2512 pk->ty.ht_type.tp_new = poly1305hash_pynew;
2513 typeready(&pk->ty.ht_type);
2514
2515 poly1305_keyinit(&pk->k, k, sz);
2516 return ((PyObject *)pk);
2517
2518 end:
2519 return (0);
2520 }
2521
2522 static PyObject *poly1305clsget_name(PyObject *me, void *hunoz)
2523 { return (PyString_FromString("poly1305")); }
2524
2525 static PyObject *poly1305clsget_keysz(PyObject *me, void *hunoz)
2526 { return (keysz_pywrap(poly1305_keysz)); }
2527
2528 static PyObject *poly1305clsget_masksz(PyObject *me, void *hunoz)
2529 { return (PyInt_FromLong(POLY1305_MASKSZ)); }
2530
2531 static PyObject *poly1305clsget_tagsz(PyObject *me, void *hunoz)
2532 { return (PyInt_FromLong(POLY1305_TAGSZ)); }
2533
2534 static PyObject *polymeth_copy(PyObject *me)
2535 {
2536 poly1305hash_pyobj *ph;
2537 ph = PyObject_NEW(poly1305hash_pyobj, me->ob_type);
2538 poly1305_copy(&ph->ctx, P1305_CTX(me));
2539 Py_INCREF(me->ob_type);
2540 return ((PyObject *)ph);
2541 }
2542
2543 static PyObject *polymeth_hash(PyObject *me, PyObject *arg)
2544 {
2545 char *p;
2546 Py_ssize_t sz;
2547 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
2548 poly1305_hash(P1305_CTX(me), p, sz);
2549 RETURN_ME;
2550 }
2551
2552 #define POLYMETH_HASHU_(n, W, w) \
2553 static PyObject *polymeth_hashu##w(PyObject *me, PyObject *arg) \
2554 { \
2555 uint##n x; \
2556 octet b[SZ_##W]; \
2557 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
2558 STORE##W(b, x); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2559 RETURN_ME; \
2560 }
2561 DOUINTCONV(POLYMETH_HASHU_)
2562
2563 #define POLYMETH_HASHBUF_(n, W, w) \
2564 static PyObject *polymeth_hashbuf##w(PyObject *me, PyObject *arg) \
2565 { \
2566 char *p; \
2567 Py_ssize_t sz; \
2568 octet b[SZ_##W]; \
2569 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
2570 if (sz > MASK##n) TYERR("string too long"); \
2571 STORE##W(b, sz); poly1305_hash(P1305_CTX(me), b, sizeof(b)); \
2572 poly1305_hash(P1305_CTX(me), p, sz); \
2573 RETURN_ME; \
2574 end: \
2575 return (0); \
2576 }
2577 DOUINTCONV(POLYMETH_HASHBUF_)
2578
2579 static PyObject *polymeth_hashstrz(PyObject *me, PyObject *arg)
2580 {
2581 char *p;
2582 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
2583 poly1305_hash(P1305_CTX(me), p, strlen(p) + 1);
2584 RETURN_ME;
2585 }
2586
2587 static PyObject *polymeth_flush(PyObject *me)
2588 { poly1305_flush(P1305_CTX(me)); RETURN_ME; }
2589
2590 static PyObject *polymeth_flushzero(PyObject *me)
2591 { poly1305_flushzero(P1305_CTX(me)); RETURN_ME; }
2592
2593 static PyObject *polymeth_concat(PyObject *me, PyObject *arg)
2594 {
2595 PyObject *pre, *suff;
2596 if (!PyArg_ParseTuple(arg, "OO:concat", &pre, &suff)) return (0);
2597 if (!PyObject_TypeCheck(pre, poly1305hash_pytype) ||
2598 !PyObject_TypeCheck(suff, poly1305hash_pytype))
2599 TYERR("wanted a poly1305hash");
2600 if (me->ob_type != pre->ob_type || me->ob_type != suff->ob_type)
2601 TYERR("key mismatch");
2602 if (P1305_CTX(pre)->nbuf) VALERR("prefix is not block-aligned");
2603 poly1305_concat(P1305_CTX(me), P1305_CTX(pre), P1305_CTX(suff));
2604 RETURN_ME;
2605 end:
2606 return (0);
2607 }
2608
2609 static PyObject *polymeth_done(PyObject *me)
2610 {
2611 PyObject *rc;
2612 if (!(P1305_F(me) & f_mask)) VALERR("no mask");
2613 rc = bytestring_pywrap(0, POLY1305_TAGSZ);
2614 poly1305_done(P1305_CTX(me), PyString_AS_STRING(rc));
2615 return (rc);
2616 end:
2617 return (0);
2618 }
2619
2620 static const PyGetSetDef poly1305cls_pygetset[] = {
2621 #define GETSETNAME(op, name) poly1305cls##op##_##name
2622 GET (keysz, "PC.keysz -> acceptable key sizes")
2623 GET (masksz, "PC.masksz -> mask size")
2624 GET (tagsz, "PC.tagsz -> MAC output size")
2625 GET (name, "PC.name -> name of this kind of MAC")
2626 #undef GETSETNAME
2627 { 0 }
2628 };
2629
2630 static const PyMethodDef poly1305hash_pymethods[] = {
2631 #define METHNAME(name) polymeth_##name
2632 NAMETH(copy, "P.copy() -> PP")
2633 METH (hash, "P.hash(M)")
2634 #define METHU_(n, W, w) METH(hashu##w, "P.hashu" #w "(WORD)")
2635 DOUINTCONV(METHU_)
2636 #undef METHU_
2637 #define METHBUF_(n, W, w) METH(hashbuf##w, "P.hashbuf" #w "(BYTES)")
2638 DOUINTCONV(METHBUF_)
2639 #undef METHBUF_
2640 METH (hashstrz, "P.hashstrz(STRING)")
2641 NAMETH(flush, "P.flush()")
2642 NAMETH(flushzero, "P.flushzero()")
2643 METH (concat, "P.concat(PREFIX, SUFFIX)")
2644 NAMETH(done, "P.done() -> TAG")
2645 #undef METHNAME
2646 { 0 }
2647 };
2648
2649 static PyTypeObject poly1305cls_pytype_skel = {
2650 PyObject_HEAD_INIT(0) 0, /* Header */
2651 "Poly1305Class", /* @tp_name@ */
2652 sizeof(PyHeapTypeObject), /* @tp_basicsize@ */
2653 0, /* @tp_itemsize@ */
2654
2655 0, /* @tp_dealloc@ */
2656 0, /* @tp_print@ */
2657 0, /* @tp_getattr@ */
2658 0, /* @tp_setattr@ */
2659 0, /* @tp_compare@ */
2660 0, /* @tp_repr@ */
2661 0, /* @tp_as_number@ */
2662 0, /* @tp_as_sequence@ */
2663 0, /* @tp_as_mapping@ */
2664 0, /* @tp_hash@ */
2665 0, /* @tp_call@ */
2666 0, /* @tp_str@ */
2667 0, /* @tp_getattro@ */
2668 0, /* @tp_setattro@ */
2669 0, /* @tp_as_buffer@ */
2670 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2671 Py_TPFLAGS_BASETYPE,
2672
2673 /* @tp_doc@ */
2674 "Poly1305 metametaclass. Best not to ask.",
2675
2676 0, /* @tp_traverse@ */
2677 0, /* @tp_clear@ */
2678 0, /* @tp_richcompare@ */
2679 0, /* @tp_weaklistoffset@ */
2680 0, /* @tp_iter@ */
2681 0, /* @tp_iternext@ */
2682 0, /* @tp_methods@ */
2683 0, /* @tp_members@ */
2684 PYGETSET(poly1305cls), /* @tp_getset@ */
2685 0, /* @tp_base@ */
2686 0, /* @tp_dict@ */
2687 0, /* @tp_descr_get@ */
2688 0, /* @tp_descr_set@ */
2689 0, /* @tp_dictoffset@ */
2690 0, /* @tp_init@ */
2691 PyType_GenericAlloc, /* @tp_alloc@ */
2692 abstract_pynew, /* @tp_new@ */
2693 0, /* @tp_free@ */
2694 0 /* @tp_is_gc@ */
2695 };
2696
2697 static PyTypeObject poly1305key_pytype_skel = {
2698 PyObject_HEAD_INIT(0) 0, /* Header */
2699 "poly1305", /* @tp_name@ */
2700 sizeof(poly1305key_pyobj), /* @tp_basicsize@ */
2701 0, /* @tp_itemsize@ */
2702
2703 0, /* @tp_dealloc@ */
2704 0, /* @tp_print@ */
2705 0, /* @tp_getattr@ */
2706 0, /* @tp_setattr@ */
2707 0, /* @tp_compare@ */
2708 0, /* @tp_repr@ */
2709 0, /* @tp_as_number@ */
2710 0, /* @tp_as_sequence@ */
2711 0, /* @tp_as_mapping@ */
2712 0, /* @tp_hash@ */
2713 0, /* @tp_call@ */
2714 0, /* @tp_str@ */
2715 0, /* @tp_getattro@ */
2716 0, /* @tp_setattro@ */
2717 0, /* @tp_as_buffer@ */
2718 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2719 Py_TPFLAGS_BASETYPE,
2720
2721 /* @tp_doc@ */
2722 "poly1305(K): Poly1305 key.",
2723
2724 0, /* @tp_traverse@ */
2725 0, /* @tp_clear@ */
2726 0, /* @tp_richcompare@ */
2727 0, /* @tp_weaklistoffset@ */
2728 0, /* @tp_iter@ */
2729 0, /* @tp_iternext@ */
2730 0, /* @tp_methods@ */
2731 0, /* @tp_members@ */
2732 0, /* @tp_getset@ */
2733 0, /* @tp_base@ */
2734 0, /* @tp_dict@ */
2735 0, /* @tp_descr_get@ */
2736 0, /* @tp_descr_set@ */
2737 0, /* @tp_dictoffset@ */
2738 0, /* @tp_init@ */
2739 PyType_GenericAlloc, /* @tp_alloc@ */
2740 poly1305key_pynew, /* @tp_new@ */
2741 0, /* @tp_free@ */
2742 0 /* @tp_is_gc@ */
2743 };
2744
2745 static PyTypeObject poly1305hash_pytype_skel = {
2746 PyObject_HEAD_INIT(0) 0, /* Header */
2747 "Poly1305Hash", /* @tp_name@ */
2748 sizeof(poly1305hash_pyobj), /* @tp_basicsize@ */
2749 0, /* @tp_itemsize@ */
2750
2751 0, /* @tp_dealloc@ */
2752 0, /* @tp_print@ */
2753 0, /* @tp_getattr@ */
2754 0, /* @tp_setattr@ */
2755 0, /* @tp_compare@ */
2756 0, /* @tp_repr@ */
2757 0, /* @tp_as_number@ */
2758 0, /* @tp_as_sequence@ */
2759 0, /* @tp_as_mapping@ */
2760 0, /* @tp_hash@ */
2761 0, /* @tp_call@ */
2762 0, /* @tp_str@ */
2763 0, /* @tp_getattro@ */
2764 0, /* @tp_setattro@ */
2765 0, /* @tp_as_buffer@ */
2766 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2767 Py_TPFLAGS_BASETYPE,
2768
2769 /* @tp_doc@ */
2770 "Poly1305 MAC context base class.",
2771
2772 0, /* @tp_traverse@ */
2773 0, /* @tp_clear@ */
2774 0, /* @tp_richcompare@ */
2775 0, /* @tp_weaklistoffset@ */
2776 0, /* @tp_iter@ */
2777 0, /* @tp_iternext@ */
2778 PYMETHODS(poly1305hash), /* @tp_methods@ */
2779 0, /* @tp_members@ */
2780 0, /* @tp_getset@ */
2781 0, /* @tp_base@ */
2782 0, /* @tp_dict@ */
2783 0, /* @tp_descr_get@ */
2784 0, /* @tp_descr_set@ */
2785 0, /* @tp_dictoffset@ */
2786 0, /* @tp_init@ */
2787 PyType_GenericAlloc, /* @tp_alloc@ */
2788 abstract_pynew, /* @tp_new@ */
2789 0, /* @tp_free@ */
2790 0 /* @tp_is_gc@ */
2791 };
2792
2793 /*----- Special snowflake for HSalsa and HChaCha --------------------------*/
2794
2795 #define DEF_HDANCE(DANCE, HDANCE, dance, hdance) \
2796 static PyObject *meth_##hdance##_prf(PyObject *me, PyObject *arg) \
2797 { \
2798 dance##_ctx dance; \
2799 char *k, *n; \
2800 Py_ssize_t ksz, nsz; \
2801 PyObject *rc; \
2802 if (!PyArg_ParseTuple(arg, "s#s#:" #hdance "_prf", \
2803 &k, &ksz, &n, &nsz)) \
2804 goto end; \
2805 if (ksz != keysz(ksz, dance##_keysz)) VALERR("bad key length"); \
2806 if (nsz != HDANCE##_INSZ) VALERR("bad input length"); \
2807 rc = bytestring_pywrap(0, HSALSA20_OUTSZ); \
2808 dance##_init(&dance, k, ksz, 0); \
2809 hdance##_prf(&dance, n, PyString_AS_STRING(rc)); \
2810 return (rc); \
2811 end: \
2812 return (0); \
2813 }
2814
2815 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa20)
2816 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa2012)
2817 DEF_HDANCE(SALSA20, HSALSA20, salsa20, hsalsa208)
2818
2819 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha20)
2820 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha12)
2821 DEF_HDANCE(CHACHA, HCHACHA, chacha, hchacha8)
2822
2823 /*----- Keccak-p[1600, n] -------------------------------------------------*/
2824
2825 static PyTypeObject *kxvik_pytype;
2826
2827 typedef struct kxvik_pyobj {
2828 PyObject_HEAD
2829 keccak1600_state s;
2830 unsigned n;
2831 } kxvik_pyobj;
2832
2833 static PyObject *kxvik_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
2834 {
2835 unsigned n = 24;
2836 kxvik_pyobj *rc = 0;
2837 static const char *const kwlist[] = { "nround", 0 };
2838 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
2839 convuint, &n))
2840 goto end;
2841 rc = (kxvik_pyobj *)ty->tp_alloc(ty, 0);
2842 rc->n = n;
2843 keccak1600_init(&rc->s);
2844 end:
2845 return ((PyObject *)rc);
2846 }
2847
2848 static PyObject *kxvikmeth_copy(PyObject *me)
2849 {
2850 kxvik_pyobj *k = (kxvik_pyobj *)me, *rc = 0;
2851 rc = (kxvik_pyobj *)k->ob_type->tp_alloc(k->ob_type, 0);
2852 rc->s = k->s; rc->n = k->n;
2853 return ((PyObject *)rc);
2854 }
2855
2856 static PyObject *kxvikmeth_mix(PyObject *me, PyObject *arg)
2857 {
2858 kxvik_pyobj *k = (kxvik_pyobj *)me;
2859 kludge64 t[25];
2860 const octet *q;
2861 octet buf[8];
2862 unsigned i;
2863 char *p; Py_ssize_t n;
2864
2865 if (!PyArg_ParseTuple(arg, "s#:mix", &p, &n)) goto end;
2866 if (n > 200) VALERR("out of range");
2867 q = (const octet *)p;
2868 i = 0;
2869 while (n > 8) { LOAD64_L_(t[i], q); i++; q += 8; n -= 8; }
2870 if (n) {
2871 memcpy(buf, q, n); memset(buf + n, 0, 8 - n);
2872 LOAD64_L_(t[i], buf); i++;
2873 }
2874 keccak1600_mix(&k->s, t, i);
2875 RETURN_ME;
2876 end:
2877 return (0);
2878 }
2879
2880 static PyObject *kxvikmeth_extract(PyObject *me, PyObject *arg)
2881 {
2882 kxvik_pyobj *k = (kxvik_pyobj *)me;
2883 PyObject *rc = 0;
2884 kludge64 t[25];
2885 octet *q, buf[8];
2886 unsigned i;
2887 unsigned n;
2888
2889 if (!PyArg_ParseTuple(arg, "O&:extract", convuint, &n)) goto end;
2890 if (n > 200) VALERR("out of range");
2891 rc = bytestring_pywrap(0, n);
2892 q = (octet *)PyString_AS_STRING(rc);
2893 keccak1600_extract(&k->s, t, (n + 7)/8);
2894 i = 0;
2895 while (n > 8) { STORE64_L_(q, t[i]); i++; q += 8; n -= 8; }
2896 if (n) { STORE64_L_(buf, t[i]); memcpy(q, buf, n); }
2897 end:
2898 return (rc);
2899 }
2900
2901 static PyObject *kxvikmeth_step(PyObject *me)
2902 {
2903 kxvik_pyobj *k = (kxvik_pyobj *)me;
2904 keccak1600_p(&k->s, &k->s, k->n);
2905 RETURN_ME;
2906 }
2907
2908 static PyObject *kxvikget_nround(PyObject *me, void *hunoz)
2909 {
2910 kxvik_pyobj *k = (kxvik_pyobj *)me;
2911 return (PyInt_FromLong(k->n));
2912 }
2913
2914 static int kxvikset_nround(PyObject *me, PyObject *val, void *hunoz)
2915 {
2916 kxvik_pyobj *k = (kxvik_pyobj *)me;
2917 unsigned n;
2918 int rc = -1;
2919
2920 if (!val) NIERR("__del__");
2921 if (!convuint(val, &n)) goto end;
2922 k->n = n;
2923 rc = 0;
2924 end:
2925 return (rc);
2926 }
2927
2928 static const PyGetSetDef kxvik_pygetset[] = {
2929 #define GETSETNAME(op, name) kxvik##op##_##name
2930 GETSET(nround, "KECCAK.nround -> number of rounds")
2931 #undef GETSETNAME
2932 { 0 }
2933 };
2934
2935 static const PyMethodDef kxvik_pymethods[] = {
2936 #define METHNAME(func) kxvikmeth_##func
2937 NAMETH(copy, "KECCAK.copy() -> KECCAK'")
2938 METH (mix, "KECCAK.mix(DATA)")
2939 METH (extract, "KECCAK.extract(NOCTETS)")
2940 NAMETH(step, "KECCAK.step()")
2941 #undef METHNAME
2942 { 0 }
2943 };
2944
2945 static PyTypeObject kxvik_pytype_skel = {
2946 PyObject_HEAD_INIT(0) 0, /* Header */
2947 "Keccak1600", /* @tp_name@ */
2948 sizeof(kxvik_pyobj), /* @tp_basicsize@ */
2949 0, /* @tp_itemsize@ */
2950
2951 0, /* @tp_dealloc@ */
2952 0, /* @tp_print@ */
2953 0, /* @tp_getattr@ */
2954 0, /* @tp_setattr@ */
2955 0, /* @tp_compare@ */
2956 0, /* @tp_repr@ */
2957 0, /* @tp_as_number@ */
2958 0, /* @tp_as_sequence@ */
2959 0, /* @tp_as_mapping@ */
2960 0, /* @tp_hash@ */
2961 0, /* @tp_call@ */
2962 0, /* @tp_str@ */
2963 0, /* @tp_getattro@ */
2964 0, /* @tp_setattro@ */
2965 0, /* @tp_as_buffer@ */
2966 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
2967 Py_TPFLAGS_BASETYPE,
2968
2969 /* @tp_doc@ */
2970 "Keccak1600([nround = 24]): Keccak-p[1600, n] state.",
2971
2972 0, /* @tp_traverse@ */
2973 0, /* @tp_clear@ */
2974 0, /* @tp_richcompare@ */
2975 0, /* @tp_weaklistoffset@ */
2976 0, /* @tp_iter@ */
2977 0, /* @tp_iternext@ */
2978 PYMETHODS(kxvik), /* @tp_methods@ */
2979 0, /* @tp_members@ */
2980 PYGETSET(kxvik), /* @tp_getset@ */
2981 0, /* @tp_base@ */
2982 0, /* @tp_dict@ */
2983 0, /* @tp_descr_get@ */
2984 0, /* @tp_descr_set@ */
2985 0, /* @tp_dictoffset@ */
2986 0, /* @tp_init@ */
2987 PyType_GenericAlloc, /* @tp_alloc@ */
2988 kxvik_pynew, /* @tp_new@ */
2989 0, /* @tp_free@ */
2990 0 /* @tp_is_gc@ */
2991 };
2992
2993 static PyTypeObject *shake_pytype, *shake128_pytype, *shake256_pytype;
2994
2995 typedef struct shake_pyobj {
2996 PyObject_HEAD
2997 int st;
2998 shake_ctx h;
2999 } shake_pyobj;
3000
3001 #define SHAKE_H(o) (&((shake_pyobj *)(o))->h)
3002 #define SHAKE_ST(o) (((shake_pyobj *)(o))->st)
3003
3004 static PyObject *shake_dopynew(void (*initfn)(shake_ctx *,
3005 const void *, size_t,
3006 const void *, size_t),
3007 PyTypeObject *ty,
3008 PyObject *arg, PyObject *kw)
3009 {
3010 shake_pyobj *rc = 0;
3011 char *p = 0, *f = 0;
3012 Py_ssize_t psz = 0, fsz = 0;
3013 static const char *const kwlist[] = { "perso", "func", 0 };
3014
3015 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|s#s#:new", KWLIST,
3016 &p, &psz, &f, &fsz))
3017 goto end;
3018 rc = (shake_pyobj *)ty->tp_alloc(ty, 0);
3019 initfn(&rc->h, f, fsz, p, psz);
3020 rc->st = 0;
3021 end:
3022 return ((PyObject *)rc);
3023 }
3024
3025 static PyObject *shake128_pynew(PyTypeObject *ty,
3026 PyObject *arg, PyObject *kw)
3027 { return (shake_dopynew(cshake128_init, ty, arg, kw)); }
3028
3029 static PyObject *shake256_pynew(PyTypeObject *ty,
3030 PyObject *arg, PyObject *kw)
3031 { return (shake_dopynew(cshake256_init, ty, arg, kw)); }
3032
3033 static int shake_check(PyObject *me, int st)
3034 {
3035 if (SHAKE_ST(me) != st) VALERR("wrong state");
3036 return (0);
3037 end:
3038 return (-1);
3039 }
3040
3041 static PyObject *shakemeth_hash(PyObject *me, PyObject *arg)
3042 {
3043 char *p;
3044 Py_ssize_t sz;
3045 if (!PyArg_ParseTuple(arg, "s#:hash", &p, &sz)) return (0);
3046 if (shake_check(me, 0)) return (0);
3047 shake_hash(SHAKE_H(me), p, sz);
3048 RETURN_ME;
3049 }
3050
3051 #define SHAKEMETH_HASHU_(n, W, w) \
3052 static PyObject *shakemeth_hashu##w(PyObject *me, PyObject *arg) \
3053 { \
3054 uint##n x; \
3055 octet b[SZ_##W]; \
3056 if (!PyArg_ParseTuple(arg, "O&:hashu" #w, convu##n, &x)) return (0); \
3057 if (shake_check(me, 0)) return (0); \
3058 STORE##W(b, x); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3059 RETURN_ME; \
3060 }
3061 DOUINTCONV(SHAKEMETH_HASHU_)
3062
3063 #define SHAKEMETH_HASHBUF_(n, W, w) \
3064 static PyObject *shakemeth_hashbuf##w(PyObject *me, PyObject *arg) \
3065 { \
3066 char *p; \
3067 Py_ssize_t sz; \
3068 octet b[SZ_##W]; \
3069 if (!PyArg_ParseTuple(arg, "s#:hashbuf" #w, &p, &sz)) goto end; \
3070 if (sz > MASK##n) TYERR("string too long"); \
3071 if (shake_check(me, 0)) goto end; \
3072 STORE##W(b, sz); shake_hash(SHAKE_H(me), b, sizeof(b)); \
3073 shake_hash(SHAKE_H(me), p, sz); \
3074 RETURN_ME; \
3075 end: \
3076 return (0); \
3077 }
3078 DOUINTCONV(SHAKEMETH_HASHBUF_)
3079
3080 static PyObject *shakemeth_hashstrz(PyObject *me, PyObject *arg)
3081 {
3082 char *p;
3083 if (!PyArg_ParseTuple(arg, "s:hashstrz", &p)) return (0);
3084 if (shake_check(me, 0)) return (0);
3085 shake_hash(SHAKE_H(me), p, strlen(p) + 1);
3086 RETURN_ME;
3087 }
3088
3089 static PyObject *shakemeth_xof(PyObject *me)
3090 {
3091 if (shake_check(me, 0)) goto end;
3092 shake_xof(SHAKE_H(me));
3093 SHAKE_ST(me) = 1;
3094 RETURN_ME;
3095 end:
3096 return (0);
3097 }
3098
3099 static PyObject *shakemeth_done(PyObject *me, PyObject *arg)
3100 {
3101 PyObject *rc = 0;
3102 size_t n;
3103 if (!PyArg_ParseTuple(arg, "O&:done", convszt, &n)) goto end;
3104 if (shake_check(me, 0)) goto end;
3105 rc = bytestring_pywrap(0, n);
3106 shake_done(SHAKE_H(me), PyString_AS_STRING(rc), n);
3107 SHAKE_ST(me) = -1;
3108 end:
3109 return (rc);
3110 }
3111
3112 static PyObject *shakemeth_copy(PyObject *me)
3113 {
3114 shake_pyobj *rc = 0;
3115
3116 rc = PyObject_NEW(shake_pyobj, me->ob_type);
3117 rc->h = *SHAKE_H(me);
3118 rc->st = SHAKE_ST(me);
3119 return ((PyObject *)rc);
3120 }
3121
3122 static PyObject *shakemeth_get(PyObject *me, PyObject *arg)
3123 {
3124 PyObject *rc = 0;
3125 size_t sz;
3126
3127 if (!PyArg_ParseTuple(arg, "O&:get", convszt, &sz)) goto end;
3128 if (shake_check(me, 1)) goto end;
3129 rc = bytestring_pywrap(0, sz);
3130 shake_get(SHAKE_H(me), PyString_AS_STRING(rc), sz);
3131 end:
3132 return (rc);
3133 }
3134
3135 static PyObject *shakemeth_mask(PyObject *me, PyObject *arg)
3136 {
3137 PyObject *rc = 0;
3138 char *p; Py_ssize_t sz;
3139
3140 if (!PyArg_ParseTuple(arg, "s#:mask", &p, &sz)) goto end;
3141 if (shake_check(me, 1)) goto end;
3142 rc = bytestring_pywrap(0, sz);
3143 shake_mask(SHAKE_H(me), p, PyString_AS_STRING(rc), sz);
3144 end:
3145 return (rc);
3146 }
3147
3148 static PyObject *shakeget_rate(PyObject *me, void *hunoz)
3149 { return (PyInt_FromLong(SHAKE_H(me)->h.r)); }
3150
3151 static PyObject *shakeget_buffered(PyObject *me, void *hunoz)
3152 { return (PyInt_FromLong(SHAKE_H(me)->h.n)); }
3153
3154 static PyObject *shakeget_state(PyObject *me, void *hunoz)
3155 {
3156 int st = SHAKE_ST(me);
3157 return (PyString_FromString(st == 0 ? "absorb" :
3158 st == 1 ? "squeeze" : "dead"));
3159 }
3160
3161 static const PyGetSetDef shake_pygetset[] = {
3162 #define GETSETNAME(op, name) shake##op##_##name
3163 GET (rate, "S.rate -> rate, in bytes")
3164 GET (buffered, "S.buffered -> amount currently buffered")
3165 GET (state, "S.state -> `absorb', `squeeze', `dead'")
3166 #undef GETSETNAME
3167 { 0 }
3168 };
3169
3170 static const PyMethodDef shake_pymethods[] = {
3171 #define METHNAME(func) shakemeth_##func
3172 NAMETH(copy, "S.copy() -> SS")
3173 METH (hash, "S.hash(M)")
3174 #define METHU_(n, W, w) METH(hashu##w, "S.hashu" #w "(WORD)")
3175 DOUINTCONV(METHU_)
3176 #undef METHU_
3177 #define METHBUF_(n, W, w) METH(hashbuf##w, "S.hashbuf" #w "(BYTES)")
3178 DOUINTCONV(METHBUF_)
3179 #undef METHBUF_
3180 METH (hashstrz, "S.hashstrz(STRING)")
3181 NAMETH(xof, "S.xof()")
3182 METH (done, "S.done(LEN) -> H")
3183 METH (get, "S.get(LEN) -> H")
3184 METH (mask, "S.mask(M) -> C")
3185 #undef METHNAME
3186 { 0 }
3187 };
3188
3189 static PyTypeObject shake_pytype_skel = {
3190 PyObject_HEAD_INIT(0) 0, /* Header */
3191 "Shake", /* @tp_name@ */
3192 sizeof(shake_pyobj), /* @tp_basicsize@ */
3193 0, /* @tp_itemsize@ */
3194
3195 0, /* @tp_dealloc@ */
3196 0, /* @tp_print@ */
3197 0, /* @tp_getattr@ */
3198 0, /* @tp_setattr@ */
3199 0, /* @tp_compare@ */
3200 0, /* @tp_repr@ */
3201 0, /* @tp_as_number@ */
3202 0, /* @tp_as_sequence@ */
3203 0, /* @tp_as_mapping@ */
3204 0, /* @tp_hash@ */
3205 0, /* @tp_call@ */
3206 0, /* @tp_str@ */
3207 0, /* @tp_getattro@ */
3208 0, /* @tp_setattro@ */
3209 0, /* @tp_as_buffer@ */
3210 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3211 Py_TPFLAGS_BASETYPE,
3212
3213 /* @tp_doc@ */
3214 "SHAKE/cSHAKE/KMAC base class.",
3215
3216 0, /* @tp_traverse@ */
3217 0, /* @tp_clear@ */
3218 0, /* @tp_richcompare@ */
3219 0, /* @tp_weaklistoffset@ */
3220 0, /* @tp_iter@ */
3221 0, /* @tp_iternext@ */
3222 PYMETHODS(shake), /* @tp_methods@ */
3223 0, /* @tp_members@ */
3224 PYGETSET(shake), /* @tp_getset@ */
3225 0, /* @tp_base@ */
3226 0, /* @tp_dict@ */
3227 0, /* @tp_descr_get@ */
3228 0, /* @tp_descr_set@ */
3229 0, /* @tp_dictoffset@ */
3230 0, /* @tp_init@ */
3231 PyType_GenericAlloc, /* @tp_alloc@ */
3232 abstract_pynew, /* @tp_new@ */
3233 0, /* @tp_free@ */
3234 0 /* @tp_is_gc@ */
3235 };
3236
3237 static PyTypeObject shake128_pytype_skel = {
3238 PyObject_HEAD_INIT(0) 0, /* Header */
3239 "Shake128", /* @tp_name@ */
3240 0, /* @tp_basicsize@ */
3241 0, /* @tp_itemsize@ */
3242
3243 0, /* @tp_dealloc@ */
3244 0, /* @tp_print@ */
3245 0, /* @tp_getattr@ */
3246 0, /* @tp_setattr@ */
3247 0, /* @tp_compare@ */
3248 0, /* @tp_repr@ */
3249 0, /* @tp_as_number@ */
3250 0, /* @tp_as_sequence@ */
3251 0, /* @tp_as_mapping@ */
3252 0, /* @tp_hash@ */
3253 0, /* @tp_call@ */
3254 0, /* @tp_str@ */
3255 0, /* @tp_getattro@ */
3256 0, /* @tp_setattro@ */
3257 0, /* @tp_as_buffer@ */
3258 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3259 Py_TPFLAGS_BASETYPE,
3260
3261 /* @tp_doc@ */
3262 "Shake128([perso = STR], [func = STR]): SHAKE128/cSHAKE128 XOF.",
3263
3264 0, /* @tp_traverse@ */
3265 0, /* @tp_clear@ */
3266 0, /* @tp_richcompare@ */
3267 0, /* @tp_weaklistoffset@ */
3268 0, /* @tp_iter@ */
3269 0, /* @tp_iternext@ */
3270 0, /* @tp_methods@ */
3271 0, /* @tp_members@ */
3272 0, /* @tp_getset@ */
3273 0, /* @tp_base@ */
3274 0, /* @tp_dict@ */
3275 0, /* @tp_descr_get@ */
3276 0, /* @tp_descr_set@ */
3277 0, /* @tp_dictoffset@ */
3278 0, /* @tp_init@ */
3279 PyType_GenericAlloc, /* @tp_alloc@ */
3280 shake128_pynew, /* @tp_new@ */
3281 0, /* @tp_free@ */
3282 0 /* @tp_is_gc@ */
3283 };
3284
3285 static PyTypeObject shake256_pytype_skel = {
3286 PyObject_HEAD_INIT(0) 0, /* Header */
3287 "Shake256", /* @tp_name@ */
3288 0, /* @tp_basicsize@ */
3289 0, /* @tp_itemsize@ */
3290
3291 0, /* @tp_dealloc@ */
3292 0, /* @tp_print@ */
3293 0, /* @tp_getattr@ */
3294 0, /* @tp_setattr@ */
3295 0, /* @tp_compare@ */
3296 0, /* @tp_repr@ */
3297 0, /* @tp_as_number@ */
3298 0, /* @tp_as_sequence@ */
3299 0, /* @tp_as_mapping@ */
3300 0, /* @tp_hash@ */
3301 0, /* @tp_call@ */
3302 0, /* @tp_str@ */
3303 0, /* @tp_getattro@ */
3304 0, /* @tp_setattro@ */
3305 0, /* @tp_as_buffer@ */
3306 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3307 Py_TPFLAGS_BASETYPE,
3308
3309 /* @tp_doc@ */
3310 "Shake256([perso = STR], [func = STR]): SHAKE256/cSHAKE256 XOF.",
3311
3312 0, /* @tp_traverse@ */
3313 0, /* @tp_clear@ */
3314 0, /* @tp_richcompare@ */
3315 0, /* @tp_weaklistoffset@ */
3316 0, /* @tp_iter@ */
3317 0, /* @tp_iternext@ */
3318 0, /* @tp_methods@ */
3319 0, /* @tp_members@ */
3320 0, /* @tp_getset@ */
3321 0, /* @tp_base@ */
3322 0, /* @tp_dict@ */
3323 0, /* @tp_descr_get@ */
3324 0, /* @tp_descr_set@ */
3325 0, /* @tp_dictoffset@ */
3326 0, /* @tp_init@ */
3327 PyType_GenericAlloc, /* @tp_alloc@ */
3328 shake256_pynew, /* @tp_new@ */
3329 0, /* @tp_free@ */
3330 0 /* @tp_is_gc@ */
3331 };
3332
3333 /*----- Pseudorandom permutations -----------------------------------------*/
3334
3335 static PyTypeObject *gcprp_pytype, *gprp_pytype;
3336
3337 typedef struct prpinfo {
3338 const char *name;
3339 const octet *keysz;
3340 size_t ctxsz;
3341 size_t blksz;
3342 void (*init)(void *, const void *, size_t);
3343 void (*eblk)(void *, const void *, void *);
3344 void (*dblk)(void *, const void *, void *);
3345 } prpinfo;
3346
3347 #define PRP_DEF(PRE, pre) \
3348 static void pre##_prpinit(void *ctx, const void *k, size_t ksz) \
3349 { pre##_init(ctx, k, ksz); } \
3350 static void pre##_prpeblk(void *ctx, const void *in, void *out) \
3351 { \
3352 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3353 pre##_eblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3354 } \
3355 static void pre##_prpdblk(void *ctx, const void *in, void *out) \
3356 { \
3357 uint32 w[PRE##_BLKSZ/4]; BLKC_LOAD(PRE, w, in); \
3358 pre##_dblk(ctx, w, w); BLKC_STORE(PRE, out, w); \
3359 } \
3360 static const prpinfo pre##_prpinfo = { \
3361 #pre, pre##_keysz, sizeof(pre##_ctx), PRE##_BLKSZ, \
3362 pre##_prpinit, pre##_prpeblk, pre##_prpdblk \
3363 };
3364 PRPS(PRP_DEF)
3365
3366 static const struct prpinfo *const gprptab[] = {
3367 #define PRP_ENTRY(PRE, pre) &pre##_prpinfo,
3368 PRPS(PRP_ENTRY)
3369 0
3370 };
3371
3372 typedef struct gcprp_pyobj {
3373 PyHeapTypeObject ty;
3374 const prpinfo *prp;
3375 } gcprp_pyobj;
3376 #define GCPRP_PRP(o) (((gcprp_pyobj *)(o))->prp)
3377
3378 typedef struct gprp_pyobj {
3379 PyObject_HEAD
3380 const prpinfo *prp;
3381 } gprp_pyobj;
3382 #define GPRP_PRP(o) (((gprp_pyobj *)(o))->prp)
3383 #define GPRP_CTX(o) (((gprp_pyobj *)(o)) + 1)
3384
3385 typedef struct prp {
3386 const prpinfo *prp;
3387 void *ctx;
3388 } prp;
3389
3390 static PyObject *gprp_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
3391 {
3392 static const char *const kwlist[] = { "key", 0 };
3393 char *k;
3394 Py_ssize_t sz;
3395 const prpinfo *prp = GCPRP_PRP(ty);
3396 PyObject *me;
3397
3398 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &k, &sz))
3399 goto end;
3400 if (keysz(sz, prp->keysz) != sz) VALERR("bad key length");
3401 me = (PyObject *)ty->tp_alloc(ty, 0);
3402 GPRP_PRP(me) = prp;
3403 prp->init(GPRP_CTX(me), k, sz);
3404 Py_INCREF(me);
3405 return (me);
3406 end:
3407 return (0);
3408 }
3409
3410 static void gprp_pydealloc(PyObject *me)
3411 { Py_DECREF(me->ob_type); FREEOBJ(me); }
3412
3413 static PyObject *gcprp_pywrap(const prpinfo *prp)
3414 {
3415 gcprp_pyobj *g = newtype(gcprp_pytype, 0, prp->name);
3416 g->prp = prp;
3417 g->ty.ht_type.tp_basicsize = sizeof(gprp_pyobj) + prp->ctxsz;
3418 g->ty.ht_type.tp_base = gprp_pytype;
3419 Py_INCREF(gprp_pytype);
3420 g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
3421 Py_TPFLAGS_BASETYPE |
3422 Py_TPFLAGS_HEAPTYPE);
3423 g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
3424 g->ty.ht_type.tp_free = 0;
3425 g->ty.ht_type.tp_new = gprp_pynew;
3426 typeready(&g->ty.ht_type);
3427 return ((PyObject *)g);
3428 }
3429
3430 static PyObject *gcpget_name(PyObject *me, void *hunoz)
3431 { return (PyString_FromString(GCPRP_PRP(me)->name)); }
3432 static PyObject *gcpget_keysz(PyObject *me, void *hunoz)
3433 { return (keysz_pywrap(GCPRP_PRP(me)->keysz)); }
3434 static PyObject *gcpget_blksz(PyObject *me, void *hunoz)
3435 { return (PyInt_FromLong(GCPRP_PRP(me)->blksz)); }
3436
3437 static PyObject *gpmeth_encrypt(PyObject *me, PyObject *arg)
3438 {
3439 char *p;
3440 Py_ssize_t n;
3441 PyObject *rc = 0;
3442
3443 if (!PyArg_ParseTuple(arg, "s#:encrypt", &p, &n)) goto end;
3444 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3445 rc = bytestring_pywrap(0, n);
3446 GPRP_PRP(me)->eblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3447 end:
3448 return (rc);
3449 }
3450
3451 static PyObject *gpmeth_decrypt(PyObject *me, PyObject *arg)
3452 {
3453 char *p;
3454 Py_ssize_t n;
3455 PyObject *rc = 0;
3456
3457 if (!PyArg_ParseTuple(arg, "s#:decrypt", &p, &n)) goto end;
3458 if (n != GPRP_PRP(me)->blksz) VALERR("incorrect block length");
3459 rc = bytestring_pywrap(0, n);
3460 GPRP_PRP(me)->dblk(GPRP_CTX(me), p, PyString_AS_STRING(rc));
3461 end:
3462 return (rc);
3463 }
3464
3465 static const PyGetSetDef gcprp_pygetset[] = {
3466 #define GETSETNAME(op, name) gcp##op##_##name
3467 GET (keysz, "CP.keysz -> acceptable key sizes")
3468 GET (blksz, "CP.blksz -> block size")
3469 GET (name, "CP.name -> name of this kind of PRP")
3470 #undef GETSETNAME
3471 { 0 }
3472 };
3473
3474 static const PyMethodDef gprp_pymethods[] = {
3475 #define METHNAME(name) gpmeth_##name
3476 METH (encrypt, "P.encrypt(PT) -> CT")
3477 METH (decrypt, "P.decrypt(CT) -> PT")
3478 #undef METHNAME
3479 { 0 }
3480 };
3481
3482 static PyTypeObject gcprp_pytype_skel = {
3483 PyObject_HEAD_INIT(0) 0, /* Header */
3484 "GCPRP", /* @tp_name@ */
3485 sizeof(gcprp_pyobj), /* @tp_basicsize@ */
3486 0, /* @tp_itemsize@ */
3487
3488 0, /* @tp_dealloc@ */
3489 0, /* @tp_print@ */
3490 0, /* @tp_getattr@ */
3491 0, /* @tp_setattr@ */
3492 0, /* @tp_compare@ */
3493 0, /* @tp_repr@ */
3494 0, /* @tp_as_number@ */
3495 0, /* @tp_as_sequence@ */
3496 0, /* @tp_as_mapping@ */
3497 0, /* @tp_hash@ */
3498 0, /* @tp_call@ */
3499 0, /* @tp_str@ */
3500 0, /* @tp_getattro@ */
3501 0, /* @tp_setattro@ */
3502 0, /* @tp_as_buffer@ */
3503 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3504 Py_TPFLAGS_BASETYPE,
3505
3506 /* @tp_doc@ */
3507 "Pseudorandom permutation metaclass.",
3508
3509 0, /* @tp_traverse@ */
3510 0, /* @tp_clear@ */
3511 0, /* @tp_richcompare@ */
3512 0, /* @tp_weaklistoffset@ */
3513 0, /* @tp_iter@ */
3514 0, /* @tp_iternext@ */
3515 0, /* @tp_methods@ */
3516 0, /* @tp_members@ */
3517 PYGETSET(gcprp), /* @tp_getset@ */
3518 0, /* @tp_base@ */
3519 0, /* @tp_dict@ */
3520 0, /* @tp_descr_get@ */
3521 0, /* @tp_descr_set@ */
3522 0, /* @tp_dictoffset@ */
3523 0, /* @tp_init@ */
3524 PyType_GenericAlloc, /* @tp_alloc@ */
3525 abstract_pynew, /* @tp_new@ */
3526 0, /* @tp_free@ */
3527 0 /* @tp_is_gc@ */
3528 };
3529
3530 static PyTypeObject gprp_pytype_skel = {
3531 PyObject_HEAD_INIT(0) 0, /* Header */
3532 "GPRP", /* @tp_name@ */
3533 sizeof(gprp_pyobj), /* @tp_basicsize@ */
3534 0, /* @tp_itemsize@ */
3535
3536 gprp_pydealloc, /* @tp_dealloc@ */
3537 0, /* @tp_print@ */
3538 0, /* @tp_getattr@ */
3539 0, /* @tp_setattr@ */
3540 0, /* @tp_compare@ */
3541 0, /* @tp_repr@ */
3542 0, /* @tp_as_number@ */
3543 0, /* @tp_as_sequence@ */
3544 0, /* @tp_as_mapping@ */
3545 0, /* @tp_hash@ */
3546 0, /* @tp_call@ */
3547 0, /* @tp_str@ */
3548 0, /* @tp_getattro@ */
3549 0, /* @tp_setattro@ */
3550 0, /* @tp_as_buffer@ */
3551 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
3552 Py_TPFLAGS_BASETYPE,
3553
3554 /* @tp_doc@ */
3555 "Pseudorandom permutation, abstract base class.",
3556
3557 0, /* @tp_traverse@ */
3558 0, /* @tp_clear@ */
3559 0, /* @tp_richcompare@ */
3560 0, /* @tp_weaklistoffset@ */
3561 0, /* @tp_iter@ */
3562 0, /* @tp_iternext@ */
3563 PYMETHODS(gprp), /* @tp_methods@ */
3564 0, /* @tp_members@ */
3565 0, /* @tp_getset@ */
3566 0, /* @tp_base@ */
3567 0, /* @tp_dict@ */
3568 0, /* @tp_descr_get@ */
3569 0, /* @tp_descr_set@ */
3570 0, /* @tp_dictoffset@ */
3571 0, /* @tp_init@ */
3572 PyType_GenericAlloc, /* @tp_alloc@ */
3573 abstract_pynew, /* @tp_new@ */
3574 0, /* @tp_free@ */
3575 0 /* @tp_is_gc@ */
3576 };
3577
3578 /*----- Main code ---------------------------------------------------------*/
3579
3580 static const PyMethodDef methods[] = {
3581 #define METHNAME(func) meth_##func
3582 #define METH_HDANCE(hdance, HDance) METH(hdance##_prf, \
3583 "" #hdance "_prf(K, N) -> H: calculate " HDance " hash of N with K")
3584 METH_HDANCE(hsalsa20, "HSalsa20")
3585 METH_HDANCE(hsalsa2012, "HSalsa20/12")
3586 METH_HDANCE(hsalsa208, "HSalsa20/8")
3587 METH_HDANCE(hchacha20, "HChaCha20")
3588 METH_HDANCE(hchacha12, "HChaCha12")
3589 METH_HDANCE(hchacha8, "HChaCha8")
3590 #undef METH_DANCE
3591 #undef METHNAME
3592 { 0 }
3593 };
3594
3595 void algorithms_pyinit(void)
3596 {
3597 INITTYPE(keysz, root);
3598 INITTYPE(keyszany, keysz);
3599 INITTYPE(keyszrange, keysz);
3600 INITTYPE(keyszset, keysz);
3601 INITTYPE(gccipher, type);
3602 INITTYPE(gcipher, root);
3603 INITTYPE(gcaead, type);
3604 INITTYPE(gaeadkey, root);
3605 INITTYPE(gcaeadaad, type);
3606 INITTYPE(gaeadaad, root);
3607 INITTYPE(gcaeadenc, type);
3608 INITTYPE(gaeadenc, root);
3609 INITTYPE(gcaeaddec, type);
3610 INITTYPE(gaeaddec, root);
3611 INITTYPE(gchash, type);
3612 INITTYPE(ghash, root);
3613 INITTYPE(gcmac, type);
3614 INITTYPE(gmac, type);
3615 INITTYPE(gmhash, ghash);
3616 INITTYPE(poly1305cls, type);
3617 INITTYPE_META(poly1305key, type, poly1305cls);
3618 INITTYPE(poly1305hash, root);
3619 INITTYPE(kxvik, root);
3620 INITTYPE(shake, root);
3621 INITTYPE(shake128, shake);
3622 INITTYPE(shake256, shake);
3623 INITTYPE(gcprp, type);
3624 INITTYPE(gprp, root);
3625 addmethods(methods);
3626 }
3627
3628 GEN(gcciphers, cipher)
3629 GEN(gcaeads, aead)
3630 GEN(gchashes, hash)
3631 GEN(gcmacs, mac)
3632 #define gcprp prpinfo
3633 GEN(gcprps, prp)
3634
3635 void algorithms_pyinsert(PyObject *mod)
3636 {
3637 PyObject *d;
3638 INSERT("KeySZ", keysz_pytype);
3639 INSERT("KeySZAny", keyszany_pytype);
3640 INSERT("KeySZRange", keyszrange_pytype);
3641 INSERT("KeySZSet", keyszset_pytype);
3642 INSERT("GCCipher", gccipher_pytype);
3643 INSERT("GCipher", gcipher_pytype);
3644 INSERT("gcciphers", gcciphers());
3645 INSERT("GCAEAD", gcaead_pytype);
3646 INSERT("GAEKey", gaeadkey_pytype);
3647 INSERT("GAEAADClass", gcaeadaad_pytype);
3648 INSERT("GAEAAD", gaeadaad_pytype);
3649 INSERT("GAEEncClass", gcaeadenc_pytype);
3650 INSERT("GAEEnc", gaeadenc_pytype);
3651 INSERT("GAEDecClass", gcaeaddec_pytype);
3652 INSERT("GAEDec", gaeaddec_pytype);
3653 INSERT("gcaeads", gcaeads());
3654 INSERT("GCHash", gchash_pytype);
3655 INSERT("GHash", ghash_pytype);
3656 INSERT("gchashes", d = gchashes());
3657 sha_pyobj = PyDict_GetItemString(d, "sha"); Py_INCREF(sha_pyobj);
3658 has160_pyobj = PyDict_GetItemString(d, "has160"); Py_INCREF(has160_pyobj);
3659 INSERT("GCMAC", gcmac_pytype);
3660 INSERT("GMAC", gmac_pytype);
3661 INSERT("GMACHash", gmhash_pytype);
3662 INSERT("gcmacs", gcmacs());
3663 INSERT("Poly1305Class", poly1305cls_pytype);
3664 INSERT("poly1305", poly1305key_pytype);
3665 INSERT("Poly1305Hash", poly1305hash_pytype);
3666 INSERT("Keccak1600", kxvik_pytype);
3667 INSERT("Shake", shake_pytype);
3668 INSERT("Shake128", shake128_pytype);
3669 INSERT("Shake256", shake256_pytype);
3670 INSERT("GCPRP", gcprp_pytype);
3671 INSERT("GPRP", gprp_pytype);
3672 INSERT("gcprps", gcprps());
3673 }
3674
3675 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings