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