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algorithms.c (KECCAK.extract): Fix method name in keyword-args string.
[catacomb-python] / pubkey.c
CommitLineData
d7ab1bab 1/* -*-c-*-
2 *
d7ab1bab 3 * Public-key cryptography
4 *
5 * (c) 2004 Straylight/Edgeware
6 */
7
b2687a0a 8/*----- Licensing notice --------------------------------------------------*
d7ab1bab 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.
b2687a0a 16 *
d7ab1bab 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.
b2687a0a 21 *
d7ab1bab 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
31/*----- DSA and similar ---------------------------------------------------*/
32
33typedef struct dsa_pyobj {
34 PyObject_HEAD
35 PyObject *G, *u, *p, *rng, *hash;
36 gdsa d;
37} dsa_pyobj;
38
39static PyTypeObject *dsapub_pytype, *dsapriv_pytype;
40static PyTypeObject *kcdsapub_pytype, *kcdsapriv_pytype;
41#define DSA_D(o) (&((dsa_pyobj *)(o))->d)
42#define DSA_G(o) (((dsa_pyobj *)(o))->G)
43#define DSA_U(o) (((dsa_pyobj *)(o))->u)
44#define DSA_P(o) (((dsa_pyobj *)(o))->p)
45#define DSA_RNG(o) (((dsa_pyobj *)(o))->rng)
46#define DSA_HASH(o) (((dsa_pyobj *)(o))->hash)
47
48static void dsa_pydealloc(PyObject *me)
49{
50 dsa_pyobj *g = (dsa_pyobj *)me;
51 Py_DECREF(g->G); Py_DECREF(g->u); Py_DECREF(g->p);
52 Py_DECREF(g->rng); Py_DECREF(g->hash);
3aa33042 53 FREEOBJ(me);
d7ab1bab 54}
55
56static PyObject *dsa_setup(PyTypeObject *ty, PyObject *G, PyObject *u,
16178155
MW		 57 PyObject *p, PyObject *rng, PyObject *hash,
58 void (*calcpub)(group *, ge *, mp *))
d7ab1bab 59{
60 dsa_pyobj *g;
16178155 61 ge *pp;
d7ab1bab 62
63 g = PyObject_New(dsa_pyobj, ty);
16178155 64 if (p) Py_INCREF(p);
d7ab1bab 65 if (!u) {
66 g->d.u = 0;
67 u = Py_None;
ff672277
MW		 68 } else {
69 if ((g->d.u = getmp(u)) == 0)
70 goto end;
71 if (MP_PYCHECK(u)) Py_INCREF(u);
72 else u = mp_pywrap(g->d.u);
73 }
16178155
MW		 74 if (!p) {
75 assert(g->d.u); assert(calcpub);
76 pp = G_CREATE(GROUP_G(G));
77 calcpub(GROUP_G(G), pp, g->d.u);
78 p = ge_pywrap(G, pp);
79 } else if (GROUP_G(G) != GE_G(p) && !group_samep(GROUP_G(G), GE_G(p)))
80 TYERR("public key not from group");
d7ab1bab 81 g->d.g = GROUP_G(G);
82 g->d.p = GE_X(p);
83 g->d.r = GRAND_R(rng);
84 g->d.h = GCHASH_CH(hash);
ff672277 85 g->G = G; Py_INCREF(G); g->u = u; g->p = p;
9ca1789e 86 g->rng = rng; Py_INCREF(rng); g->hash = hash; Py_INCREF(hash);
d7ab1bab 87 return ((PyObject *)g);
88end:
16178155 89 if (p) Py_DECREF(p);
3aa33042 90 FREEOBJ(g);
d7ab1bab 91 return (0);
92}
93
94static PyObject *dsapub_pynew(PyTypeObject *ty,
95 PyObject *arg, PyObject *kw)
96{
16178155 97 PyObject *G, *p, *rng = rand_pyobj, *hash = sha_pyobj;
d7ab1bab 98 PyObject *rc = 0;
16178155 99 char *kwlist[] = { "G", "p", "hash", "rng", 0 };
d7ab1bab 100
16178155 101 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
d7ab1bab 102 group_pytype, &G,
103 ge_pytype, &p,
d7ab1bab 104 gchash_pytype, &hash,
105 grand_pytype, &rng) ||
16178155 106 (rc = dsa_setup(dsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
d7ab1bab 107 goto end;
108end:
109 return (rc);
110}
111
112static PyObject *dsameth_beginhash(PyObject *me, PyObject *arg)
113{
114 if (!PyArg_ParseTuple(arg, ":beginhash")) return (0);
115 return (ghash_pywrap(DSA_HASH(me), gdsa_beginhash(DSA_D(me)), f_freeme));
116}
117
118static PyObject *dsameth_endhash(PyObject *me, PyObject *arg)
119{
120 ghash *h;
121 PyObject *rc;
122 if (!PyArg_ParseTuple(arg, "O&:endhash", convghash, &h)) return (0);
123 gdsa_endhash(DSA_D(me), h);
124 h = GH_COPY(h);
125 rc = bytestring_pywrap(0, GH_CLASS(h)->hashsz);
126 GH_DONE(h, PyString_AS_STRING(rc));
127 GH_DESTROY(h);
128 return (rc);
129}
130
131static PyObject *dsameth_sign(PyObject *me, PyObject *arg, PyObject *kw)
132{
133 gdsa_sig s = GDSA_SIG_INIT;
134 char *p;
6b54260d 135 Py_ssize_t n;
d7ab1bab 136 mp *k = 0;
137 PyObject *rc = 0;
138 char *kwlist[] = { "msg", "k", 0 };
139
140 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:sign", kwlist,
141 &p, &n, convmp, &k))
142 goto end;
143 if (n != DSA_D(me)->h->hashsz)
144 VALERR("bad message length (doesn't match hash size)");
145 gdsa_sign(DSA_D(me), &s, p, k);
146 rc = Py_BuildValue("(NN)", mp_pywrap(s.r), mp_pywrap(s.s));
147end:
148 mp_drop(k);
149 return (rc);
150}
151
152static PyObject *dsameth_verify(PyObject *me, PyObject *arg)
153{
154 char *p;
6b54260d 155 Py_ssize_t n;
d7ab1bab 156 gdsa_sig s = GDSA_SIG_INIT;
157 PyObject *rc = 0;
158
159 if (!PyArg_ParseTuple(arg, "s#(O&O&):verify",
160 &p, &n, convmp, &s.r, convmp, &s.s))
161 goto end;
162 if (n != DSA_D(me)->h->hashsz)
163 VALERR("bad message length (doesn't match hash size)");
9ca1789e 164 rc = getbool(!gdsa_verify(DSA_D(me), &s, p));
d7ab1bab 165end:
166 mp_drop(s.r);
167 mp_drop(s.s);
168 return (rc);
169}
170
16178155
MW		 171static void dsa_calcpub(group *g, ge *p, mp *u) { G_EXP(g, p, g->g, u); }
172
d7ab1bab 173static PyObject *dsapriv_pynew(PyTypeObject *ty,
174 PyObject *arg, PyObject *kw)
175{
16178155 176 PyObject *G, *p = 0, *u, *rng = rand_pyobj, *hash = sha_pyobj;
d7ab1bab 177 PyObject *rc = 0;
16178155 178 char *kwlist[] = { "G", "u", "p", "hash", "rng", 0 };
d7ab1bab 179
16178155 180 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
d7ab1bab 181 group_pytype, &G,
d7ab1bab 182 &u,
16178155 183 ge_pytype, &p,
d7ab1bab 184 gchash_pytype, &hash,
185 grand_pytype, &rng) ||
16178155 186 (rc = dsa_setup(dsapriv_pytype, G, u, p, rng, hash, dsa_calcpub)) == 0)
d7ab1bab 187 goto end;
188end:
189 return (rc);
190}
191
192static PyMethodDef dsapub_pymethods[] = {
193#define METHNAME(name) dsameth_##name
194 METH (beginhash, "D.beginhash() -> hash object")
195 METH (endhash, "D.endhash(H) -> BYTES")
196 METH (verify, "D.verify(MSG, (R, S)) -> true/false")
197#undef METHNAME
198 { 0 }
199};
200
201static PyMethodDef dsapriv_pymethods[] = {
202#define METHNAME(name) dsameth_##name
1df8d5fe 203 KWMETH(sign, "D.sign(MSG, [k = K]) -> R, S")
d7ab1bab 204#undef METHNAME
205 { 0 }
206};
207
208static PyMemberDef dsapub_pymembers[] = {
209#define MEMBERSTRUCT dsa_pyobj
210 MEMBER(G, T_OBJECT, READONLY, "D.G -> group to work in")
211 MEMBER(p, T_OBJECT, READONLY, "D.p -> public key (group element")
212 MEMBER(rng, T_OBJECT, READONLY, "D.rng -> random number generator")
b2687a0a 213 MEMBER(hash, T_OBJECT, READONLY, "D.hash -> hash class")
d7ab1bab 214#undef MEMBERSTRUCT
215 { 0 }
216};
217
218static PyMemberDef dsapriv_pymembers[] = {
219#define MEMBERSTRUCT dsa_pyobj
220 MEMBER(u, T_OBJECT, READONLY, "D.u -> private key (exponent)")
221#undef MEMBERSTRUCT
222 { 0 }
223};
224
225static PyTypeObject dsapub_pytype_skel = {
6d4db0bf 226 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 227 "DSAPub", /* @tp_name@ */
d7ab1bab 228 sizeof(dsa_pyobj), /* @tp_basicsize@ */
229 0, /* @tp_itemsize@ */
230
231 dsa_pydealloc, /* @tp_dealloc@ */
232 0, /* @tp_print@ */
233 0, /* @tp_getattr@ */
234 0, /* @tp_setattr@ */
235 0, /* @tp_compare@ */
236 0, /* @tp_repr@ */
237 0, /* @tp_as_number@ */
238 0, /* @tp_as_sequence@ */
239 0, /* @tp_as_mapping@ */
240 0, /* @tp_hash@ */
241 0, /* @tp_call@ */
242 0, /* @tp_str@ */
243 0, /* @tp_getattro@ */
244 0, /* @tp_setattro@ */
245 0, /* @tp_as_buffer@ */
246 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
247 Py_TPFLAGS_BASETYPE,
248
249 /* @tp_doc@ */
250"DSA public key information.",
251
252 0, /* @tp_traverse@ */
253 0, /* @tp_clear@ */
254 0, /* @tp_richcompare@ */
255 0, /* @tp_weaklistoffset@ */
256 0, /* @tp_iter@ */
963a6148 257 0, /* @tp_iternext@ */
d7ab1bab 258 dsapub_pymethods, /* @tp_methods@ */
259 dsapub_pymembers, /* @tp_members@ */
260 0, /* @tp_getset@ */
261 0, /* @tp_base@ */
262 0, /* @tp_dict@ */
263 0, /* @tp_descr_get@ */
264 0, /* @tp_descr_set@ */
265 0, /* @tp_dictoffset@ */
266 0, /* @tp_init@ */
267 PyType_GenericAlloc, /* @tp_alloc@ */
268 dsapub_pynew, /* @tp_new@ */
3aa33042 269 0, /* @tp_free@ */
d7ab1bab 270 0 /* @tp_is_gc@ */
271};
272
273static PyTypeObject dsapriv_pytype_skel = {
6d4db0bf 274 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 275 "DSAPriv", /* @tp_name@ */
d7ab1bab 276 sizeof(dsa_pyobj), /* @tp_basicsize@ */
277 0, /* @tp_itemsize@ */
278
279 0, /* @tp_dealloc@ */
280 0, /* @tp_print@ */
281 0, /* @tp_getattr@ */
282 0, /* @tp_setattr@ */
283 0, /* @tp_compare@ */
284 0, /* @tp_repr@ */
285 0, /* @tp_as_number@ */
286 0, /* @tp_as_sequence@ */
287 0, /* @tp_as_mapping@ */
288 0, /* @tp_hash@ */
289 0, /* @tp_call@ */
290 0, /* @tp_str@ */
291 0, /* @tp_getattro@ */
292 0, /* @tp_setattro@ */
293 0, /* @tp_as_buffer@ */
294 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
295 Py_TPFLAGS_BASETYPE,
296
297 /* @tp_doc@ */
298"DSA private key information.",
299
300 0, /* @tp_traverse@ */
301 0, /* @tp_clear@ */
302 0, /* @tp_richcompare@ */
303 0, /* @tp_weaklistoffset@ */
304 0, /* @tp_iter@ */
963a6148 305 0, /* @tp_iternext@ */
d7ab1bab 306 dsapriv_pymethods, /* @tp_methods@ */
307 dsapriv_pymembers, /* @tp_members@ */
308 0, /* @tp_getset@ */
309 0, /* @tp_base@ */
310 0, /* @tp_dict@ */
311 0, /* @tp_descr_get@ */
312 0, /* @tp_descr_set@ */
313 0, /* @tp_dictoffset@ */
314 0, /* @tp_init@ */
315 PyType_GenericAlloc, /* @tp_alloc@ */
316 dsapriv_pynew, /* @tp_new@ */
3aa33042 317 0, /* @tp_free@ */
d7ab1bab 318 0 /* @tp_is_gc@ */
319};
320
321static PyObject *kcdsapub_pynew(PyTypeObject *ty,
322 PyObject *arg, PyObject *kw)
323{
16178155 324 PyObject *G, *p, *rng = rand_pyobj, *hash = has160_pyobj;
d7ab1bab 325 PyObject *rc = 0;
16178155 326 char *kwlist[] = { "G", "p", "hash", "rng", 0 };
d7ab1bab 327
16178155 328 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
d7ab1bab 329 group_pytype, &G,
330 ge_pytype, &p,
d7ab1bab 331 gchash_pytype, &hash,
332 grand_pytype, &rng) ||
16178155 333 (rc = dsa_setup(kcdsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
d7ab1bab 334 goto end;
335end:
336 return (rc);
337}
338
16178155
MW		 339static void kcdsa_calcpub(group *g, ge *p, mp *u)
340{
341 mp *uinv = mp_modinv(MP_NEW, u, g->r);
342 G_EXP(g, p, g->g, uinv);
343 mp_drop(uinv);
344}
345
d7ab1bab 346static PyObject *kcdsapriv_pynew(PyTypeObject *ty,
347 PyObject *arg, PyObject *kw)
348{
16178155 349 PyObject *G, *u, *p = 0, *rng = rand_pyobj, *hash = has160_pyobj;
d7ab1bab 350 PyObject *rc = 0;
c142539d 351 char *kwlist[] = { "G", "u", "p", "hash", "rng", 0 };
d7ab1bab 352
16178155 353 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
d7ab1bab 354 group_pytype, &G,
d7ab1bab 355 &u,
16178155 356 ge_pytype, &p,
d7ab1bab 357 gchash_pytype, &hash,
358 grand_pytype, &rng) ||
16178155
MW		 359 (rc = dsa_setup(kcdsapriv_pytype, G, u, p,
360 rng, hash, kcdsa_calcpub)) == 0)
d7ab1bab 361 goto end;
362end:
363 return (rc);
364}
365
366static PyObject *kcdsameth_beginhash(PyObject *me, PyObject *arg)
367{
368 if (!PyArg_ParseTuple(arg, ":beginhash")) return (0);
369 return (ghash_pywrap(DSA_HASH(me), gkcdsa_beginhash(DSA_D(me)), f_freeme));
370}
371
372static PyObject *kcdsameth_endhash(PyObject *me, PyObject *arg)
373{
374 ghash *h;
375 PyObject *rc;
376 if (!PyArg_ParseTuple(arg, "O&:endhash", convghash, &h)) return (0);
377 gkcdsa_endhash(DSA_D(me), h);
378 h = GH_COPY(h);
379 rc = bytestring_pywrap(0, GH_CLASS(h)->hashsz);
380 GH_DONE(h, PyString_AS_STRING(rc));
381 GH_DESTROY(h);
382 return (rc);
383}
384
385static PyObject *kcdsameth_sign(PyObject *me, PyObject *arg, PyObject *kw)
386{
387 gkcdsa_sig s = GKCDSA_SIG_INIT;
388 char *p;
6b54260d 389 Py_ssize_t n;
d7ab1bab 390 mp *k = 0;
391 PyObject *r = 0, *rc = 0;
392 char *kwlist[] = { "msg", "k", 0 };
393
394 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:sign", kwlist,
395 &p, &n, convmp, &k))
396 goto end;
397 if (n != DSA_D(me)->h->hashsz)
398 VALERR("bad message length (doesn't match hash size)");
399 r = bytestring_pywrap(0, DSA_D(me)->h->hashsz);
46e6ad89 400 s.r = (octet *)PyString_AS_STRING(r);
d7ab1bab 401 gkcdsa_sign(DSA_D(me), &s, p, k);
9ca1789e 402 rc = Py_BuildValue("(ON)", r, mp_pywrap(s.s));
d7ab1bab 403end:
404 Py_XDECREF(r);
405 mp_drop(k);
406 return (rc);
407}
408
409static PyObject *kcdsameth_verify(PyObject *me, PyObject *arg)
410{
411 char *p;
6b54260d 412 Py_ssize_t n, rn;
d7ab1bab 413 gkcdsa_sig s = GKCDSA_SIG_INIT;
414 PyObject *rc = 0;
415
416 if (!PyArg_ParseTuple(arg, "s#(s#O&):verify",
417 &p, &n, &s.r, &rn, convmp, &s.s))
418 goto end;
419 if (n != DSA_D(me)->h->hashsz)
420 VALERR("bad message length (doesn't match hash size)");
421 if (rn != DSA_D(me)->h->hashsz)
422 VALERR("bad signature `r' length (doesn't match hash size)");
9ca1789e 423 rc = getbool(!gkcdsa_verify(DSA_D(me), &s, p));
d7ab1bab 424end:
425 mp_drop(s.s);
426 return (rc);
427}
428
429static PyMethodDef kcdsapub_pymethods[] = {
430#define METHNAME(name) kcdsameth_##name
431 METH (beginhash, "D.beginhash() -> hash object")
432 METH (endhash, "D.endhash(H) -> BYTES")
433 METH (verify, "D.verify(MSG, (R, S)) -> true/false")
434#undef METHNAME
435 { 0 }
436};
437
438static PyMethodDef kcdsapriv_pymethods[] = {
439#define METHNAME(name) kcdsameth_##name
1df8d5fe 440 KWMETH(sign, "D.sign(MSG, [k = K]) -> R, S")
d7ab1bab 441#undef METHNAME
442 { 0 }
443};
444
445static PyTypeObject kcdsapub_pytype_skel = {
6d4db0bf 446 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 447 "KCDSAPub", /* @tp_name@ */
d7ab1bab 448 sizeof(dsa_pyobj), /* @tp_basicsize@ */
449 0, /* @tp_itemsize@ */
450
451 dsa_pydealloc, /* @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"KCDSA public key information.",
471
472 0, /* @tp_traverse@ */
473 0, /* @tp_clear@ */
474 0, /* @tp_richcompare@ */
475 0, /* @tp_weaklistoffset@ */
476 0, /* @tp_iter@ */
963a6148 477 0, /* @tp_iternext@ */
d7ab1bab 478 kcdsapub_pymethods, /* @tp_methods@ */
479 dsapub_pymembers, /* @tp_members@ */
480 0, /* @tp_getset@ */
481 0, /* @tp_base@ */
482 0, /* @tp_dict@ */
483 0, /* @tp_descr_get@ */
484 0, /* @tp_descr_set@ */
485 0, /* @tp_dictoffset@ */
486 0, /* @tp_init@ */
487 PyType_GenericAlloc, /* @tp_alloc@ */
488 kcdsapub_pynew, /* @tp_new@ */
3aa33042 489 0, /* @tp_free@ */
d7ab1bab 490 0 /* @tp_is_gc@ */
491};
492
493static PyTypeObject kcdsapriv_pytype_skel = {
6d4db0bf 494 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 495 "KCDSAPriv", /* @tp_name@ */
d7ab1bab 496 sizeof(dsa_pyobj), /* @tp_basicsize@ */
497 0, /* @tp_itemsize@ */
498
499 0, /* @tp_dealloc@ */
500 0, /* @tp_print@ */
501 0, /* @tp_getattr@ */
502 0, /* @tp_setattr@ */
503 0, /* @tp_compare@ */
504 0, /* @tp_repr@ */
505 0, /* @tp_as_number@ */
506 0, /* @tp_as_sequence@ */
507 0, /* @tp_as_mapping@ */
508 0, /* @tp_hash@ */
509 0, /* @tp_call@ */
510 0, /* @tp_str@ */
511 0, /* @tp_getattro@ */
512 0, /* @tp_setattro@ */
513 0, /* @tp_as_buffer@ */
514 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
515 Py_TPFLAGS_BASETYPE,
516
517 /* @tp_doc@ */
518"KCDSA private key information.",
519
520 0, /* @tp_traverse@ */
521 0, /* @tp_clear@ */
522 0, /* @tp_richcompare@ */
523 0, /* @tp_weaklistoffset@ */
524 0, /* @tp_iter@ */
963a6148 525 0, /* @tp_iternext@ */
d7ab1bab 526 kcdsapriv_pymethods, /* @tp_methods@ */
527 dsapriv_pymembers, /* @tp_members@ */
528 0, /* @tp_getset@ */
529 0, /* @tp_base@ */
530 0, /* @tp_dict@ */
531 0, /* @tp_descr_get@ */
532 0, /* @tp_descr_set@ */
533 0, /* @tp_dictoffset@ */
534 0, /* @tp_init@ */
535 PyType_GenericAlloc, /* @tp_alloc@ */
536 kcdsapriv_pynew, /* @tp_new@ */
3aa33042 537 0, /* @tp_free@ */
d7ab1bab 538 0 /* @tp_is_gc@ */
539};
540
541/*----- RSA ---------------------------------------------------------------*/
542
543typedef struct rsapub_pyobj {
544 PyObject_HEAD
545 rsa_pub pub;
546 rsa_pubctx pubctx;
547} rsapub_pyobj;
548
549#define RSA_PUB(o) (&((rsapub_pyobj *)(o))->pub)
550#define RSA_PUBCTX(o) (&((rsapub_pyobj *)(o))->pubctx)
551
552typedef struct rsapriv_pyobj {
553 PyObject_HEAD
554 rsa_pub pub;
555 rsa_pubctx pubctx;
556 rsa_priv priv;
557 rsa_privctx privctx;
558 PyObject *rng;
559} rsapriv_pyobj;
560
561#define RSA_PRIV(o) (&((rsapriv_pyobj *)(o))->priv)
562#define RSA_PRIVCTX(o) (&((rsapriv_pyobj *)(o))->privctx)
563#define RSA_RNG(o) (((rsapriv_pyobj *)(o))->rng)
564
565static PyTypeObject *rsapub_pytype, *rsapriv_pytype;
566
567static PyObject *rsapub_pynew(PyTypeObject *ty,
568 PyObject *arg, PyObject *kw)
569{
570 rsa_pub rp = { 0 };
571 rsapub_pyobj *o;
572 char *kwlist[] = { "n", "e", 0 };
573
574 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:new", kwlist,
575 convmp, &rp.n, convmp, &rp.e))
576 goto end;
61cc9665 577 if (!MP_ODDP(rp.n)) VALERR("RSA modulus must be even");
d7ab1bab 578 o = (rsapub_pyobj *)ty->tp_alloc(ty, 0);
579 o->pub = rp;
580 rsa_pubcreate(&o->pubctx, &o->pub);
581 return ((PyObject *)o);
582end:
583 rsa_pubfree(&rp);
584 return (0);
585}
586
587static void rsapub_pydealloc(PyObject *me)
588{
589 rsa_pubdestroy(RSA_PUBCTX(me));
590 rsa_pubfree(RSA_PUB(me));
3aa33042 591 FREEOBJ(me);
d7ab1bab 592}
593
594static PyObject *rsaget_n(PyObject *me, void *hunoz)
595 { return mp_pywrap(MP_COPY(RSA_PUB(me)->n)); }
596
597static PyObject *rsaget_e(PyObject *me, void *hunoz)
598 { return mp_pywrap(MP_COPY(RSA_PUB(me)->e)); }
599
600static PyObject *rsameth_pubop(PyObject *me, PyObject *arg)
601{
602 mp *x = 0;
603 PyObject *rc = 0;
604
605 if (!PyArg_ParseTuple(arg, "O&:pubop", convmp, &x)) goto end;
606 rc = mp_pywrap(rsa_pubop(RSA_PUBCTX(me), MP_NEW, x));
607end:
608 mp_drop(x);
609 return (rc);
610}
611
612static PyObject *rsapriv_dopywrap(PyTypeObject *ty,
613 rsa_priv *rp, PyObject *rng)
614{
615 rsapriv_pyobj *o;
616
617 o = (rsapriv_pyobj *)ty->tp_alloc(ty, 0);
618 o->priv = *rp;
619 o->pub.n = rp->n;
620 o->pub.e = rp->e;
621 rsa_privcreate(&o->privctx, &o->priv, &rand_global);
622 rsa_pubcreate(&o->pubctx, &o->pub);
623 if (!rng) {
624 rng = Py_None;
625 Py_INCREF(rng);
626 }
627 o->rng = rng;
628 return ((PyObject *)o);
629}
630
631PyObject *rsapriv_pywrap(rsa_priv *rp)
632 { return rsapriv_dopywrap(rsapriv_pytype, rp, 0); }
633
634static PyObject *rsapriv_pynew(PyTypeObject *ty,
635 PyObject *arg, PyObject *kw)
636{
637 rsa_priv rp = { 0 };
638 PyObject *rng = Py_None;
639 char *kwlist[] =
640 { "n", "e", "d", "p", "q", "dp", "dq", "q_inv", "rng", 0 };
641
642 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&O&O&O&O&O&O&O:new", kwlist,
643 convmp, &rp.n, convmp, &rp.e,
644 convmp, &rp.d,
645 convmp, &rp.p, convmp, &rp.q,
646 convmp, &rp.dp, convmp, &rp.dq,
647 convmp, &rp.q_inv,
648 &rng))
649 goto end;
61cc9665
MW		 650 if ((rp.n && !MP_ODDP(rp.n)) ||
651 (rp.p && !MP_ODDP(rp.p)) ||
652 (rp.p && !MP_ODDP(rp.q)))
653 VALERR("RSA modulus and factors must be odd");
d7ab1bab 654 if (rsa_recover(&rp)) VALERR("couldn't construct private key");
655 if (rng != Py_None && !GRAND_PYCHECK(rng))
656 TYERR("not a random number source");
657 Py_INCREF(rng);
658 return (rsapriv_dopywrap(ty, &rp, rng));
659end:
660 rsa_privfree(&rp);
661 return (0);
662}
663
664static void rsapriv_pydealloc(PyObject *me)
665{
666 RSA_PRIVCTX(me)->r = &rand_global;
667 rsa_privdestroy(RSA_PRIVCTX(me));
668 rsa_privfree(RSA_PRIV(me));
669 Py_DECREF(RSA_RNG(me));
3aa33042 670 FREEOBJ(me);
d7ab1bab 671}
672
673static PyObject *rsaget_d(PyObject *me, void *hunoz)
674 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->d)); }
675
676static PyObject *rsaget_p(PyObject *me, void *hunoz)
677 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->p)); }
678
679static PyObject *rsaget_q(PyObject *me, void *hunoz)
680 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q)); }
681
682static PyObject *rsaget_dp(PyObject *me, void *hunoz)
683 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dp)); }
684
685static PyObject *rsaget_dq(PyObject *me, void *hunoz)
686 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dq)); }
687
688static PyObject *rsaget_q_inv(PyObject *me, void *hunoz)
689 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q_inv)); }
690
691static PyObject *rsaget_rng(PyObject *me, void *hunoz)
692 { RETURN_OBJ(RSA_RNG(me)); }
693
694static int rsaset_rng(PyObject *me, PyObject *val, void *hunoz)
695{
696 int rc = -1;
f368b46e
MW		 697 if (!val)
698 val = Py_None;
699 else if (val != Py_None && !GRAND_PYCHECK(val))
d7ab1bab 700 TYERR("expected grand or None");
701 Py_DECREF(RSA_RNG(me));
702 RSA_RNG(me) = val;
703 Py_INCREF(val);
704 rc = 0;
705end:
706 return (rc);
707}
708
709static PyObject *rsameth_privop(PyObject *me, PyObject *arg, PyObject *kw)
710{
711 PyObject *rng = RSA_RNG(me);
712 mp *x = 0;
713 PyObject *rc = 0;
714 char *kwlist[] = { "x", "rng", 0 };
715
716 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:privop", kwlist,
717 convmp, &x, &rng))
718 goto end;
719 if (rng != Py_None && !GRAND_PYCHECK(rng))
720 TYERR("not a random number source");
721 RSA_PRIVCTX(me)->r = (rng == Py_None) ? 0 : GRAND_R(rng);
722 rc = mp_pywrap(rsa_privop(RSA_PRIVCTX(me), MP_NEW, x));
723end:
724 mp_drop(x);
725 return (rc);
726}
727
728static PyObject *meth__RSAPriv_generate(PyObject *me,
729 PyObject *arg, PyObject *kw)
730{
731 grand *r = &rand_global;
732 unsigned nbits;
733 unsigned n = 0;
734 rsa_priv rp;
084e6c29 735 mp *e = 0;
930d78e3
MW		 736 struct excinfo exc = EXCINFO_INIT;
737 pypgev evt = { { 0 } };
084e6c29 738 char *kwlist[] = { "class", "nbits", "event", "rng", "nsteps", "e", 0 };
d7ab1bab 739 PyObject *rc = 0;
740
930d78e3 741 evt.exc = &exc;
084e6c29 742 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&O&:generate", kwlist,
d7ab1bab 743 &me, convuint, &nbits, convpgev, &evt,
084e6c29
MW		 744 convgrand, &r, convuint, &n,
745 convmp, &e))
d7ab1bab 746 goto end;
084e6c29
MW		 747 if (e) MP_COPY(e);
748 else e = mp_fromulong(MP_NEW, 65537);
930d78e3
MW		 749 if (rsa_gen_e(&rp, nbits, e, r, n, evt.ev.proc, evt.ev.ctx))
750 PGENERR(&exc);
d7ab1bab 751 rc = rsapriv_pywrap(&rp);
752end:
753 droppgev(&evt);
084e6c29 754 mp_drop(e);
d7ab1bab 755 return (rc);
756}
757
758static PyGetSetDef rsapub_pygetset[] = {
759#define GETSETNAME(op, name) rsa##op##_##name
760 GET (n, "R.n -> N")
761 GET (e, "R.e -> E")
762#undef GETSETNAME
763 { 0 }
764};
765
766static PyMethodDef rsapub_pymethods[] = {
767#define METHNAME(name) rsameth_##name
768 METH (pubop, "R.pubop(X) -> X^E (mod N)")
769#undef METHNAME
770 { 0 }
771};
772
773static PyGetSetDef rsapriv_pygetset[] = {
774#define GETSETNAME(op, name) rsa##op##_##name
775 GET (d, "R.d -> D")
776 GET (p, "R.p -> P")
777 GET (q, "R.q -> Q")
778 GET (dp, "R.dp -> D mod (P - 1)")
779 GET (dq, "R.dq -> D mod (Q - 1)")
780 GET (q_inv, "R.q_inv -> Q^{-1} mod P")
781 GETSET(rng, "R.rng -> random number source for blinding")
782#undef GETSETNAME
783 { 0 }
784};
785
786static PyMethodDef rsapriv_pymethods[] = {
787#define METHNAME(name) rsameth_##name
1df8d5fe 788 KWMETH(privop, "R.privop(X, [rng = None]) -> X^D (mod N)")
d7ab1bab 789#undef METHNAME
790 { 0 }
791};
792
793static PyTypeObject rsapub_pytype_skel = {
6d4db0bf 794 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 795 "RSAPub", /* @tp_name@ */
d7ab1bab 796 sizeof(rsapub_pyobj), /* @tp_basicsize@ */
797 0, /* @tp_itemsize@ */
798
799 rsapub_pydealloc, /* @tp_dealloc@ */
800 0, /* @tp_print@ */
801 0, /* @tp_getattr@ */
802 0, /* @tp_setattr@ */
803 0, /* @tp_compare@ */
804 0, /* @tp_repr@ */
805 0, /* @tp_as_number@ */
806 0, /* @tp_as_sequence@ */
807 0, /* @tp_as_mapping@ */
808 0, /* @tp_hash@ */
809 0, /* @tp_call@ */
810 0, /* @tp_str@ */
811 0, /* @tp_getattro@ */
812 0, /* @tp_setattro@ */
813 0, /* @tp_as_buffer@ */
814 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
815 Py_TPFLAGS_BASETYPE,
816
817 /* @tp_doc@ */
818"RSA public key information.",
819
820 0, /* @tp_traverse@ */
821 0, /* @tp_clear@ */
822 0, /* @tp_richcompare@ */
823 0, /* @tp_weaklistoffset@ */
824 0, /* @tp_iter@ */
963a6148 825 0, /* @tp_iternext@ */
d7ab1bab 826 rsapub_pymethods, /* @tp_methods@ */
827 0, /* @tp_members@ */
828 rsapub_pygetset, /* @tp_getset@ */
829 0, /* @tp_base@ */
830 0, /* @tp_dict@ */
831 0, /* @tp_descr_get@ */
832 0, /* @tp_descr_set@ */
833 0, /* @tp_dictoffset@ */
834 0, /* @tp_init@ */
835 PyType_GenericAlloc, /* @tp_alloc@ */
836 rsapub_pynew, /* @tp_new@ */
3aa33042 837 0, /* @tp_free@ */
d7ab1bab 838 0 /* @tp_is_gc@ */
839};
840
841static PyTypeObject rsapriv_pytype_skel = {
6d4db0bf 842 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 843 "RSAPriv", /* @tp_name@ */
d7ab1bab 844 sizeof(rsapriv_pyobj), /* @tp_basicsize@ */
845 0, /* @tp_itemsize@ */
846
847 rsapriv_pydealloc, /* @tp_dealloc@ */
848 0, /* @tp_print@ */
849 0, /* @tp_getattr@ */
850 0, /* @tp_setattr@ */
851 0, /* @tp_compare@ */
852 0, /* @tp_repr@ */
853 0, /* @tp_as_number@ */
854 0, /* @tp_as_sequence@ */
855 0, /* @tp_as_mapping@ */
856 0, /* @tp_hash@ */
857 0, /* @tp_call@ */
858 0, /* @tp_str@ */
859 0, /* @tp_getattro@ */
860 0, /* @tp_setattro@ */
861 0, /* @tp_as_buffer@ */
862 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
863 Py_TPFLAGS_BASETYPE,
864
865 /* @tp_doc@ */
866"RSA private key information.",
867
868 0, /* @tp_traverse@ */
869 0, /* @tp_clear@ */
870 0, /* @tp_richcompare@ */
871 0, /* @tp_weaklistoffset@ */
872 0, /* @tp_iter@ */
963a6148 873 0, /* @tp_iternext@ */
d7ab1bab 874 rsapriv_pymethods, /* @tp_methods@ */
875 0, /* @tp_members@ */
876 rsapriv_pygetset, /* @tp_getset@ */
877 0, /* @tp_base@ */
878 0, /* @tp_dict@ */
879 0, /* @tp_descr_get@ */
880 0, /* @tp_descr_set@ */
881 0, /* @tp_dictoffset@ */
882 0, /* @tp_init@ */
883 PyType_GenericAlloc, /* @tp_alloc@ */
884 rsapriv_pynew, /* @tp_new@ */
3aa33042 885 0, /* @tp_free@ */
d7ab1bab 886 0 /* @tp_is_gc@ */
887};
888
889/*----- RSA padding schemes -----------------------------------------------*/
890
891static PyObject *meth__p1crypt_encode(PyObject *me,
892 PyObject *arg, PyObject *kw)
893{
894 pkcs1 p1;
895 char *m, *ep;
6b54260d 896 Py_ssize_t msz, epsz;
d7ab1bab 897 unsigned long nbits;
898 PyObject *rc = 0;
899 octet *b = 0;
900 size_t sz;
901 mp *x;
902 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
903
904 p1.r = &rand_global; ep = 0; epsz = 0;
905 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
906 &m, &msz, convulong, &nbits,
907 &ep, &epsz, convgrand, &p1.r))
908 goto end;
909 sz = (nbits + 7)/8;
910 p1.ep = ep; p1.epsz = epsz;
911 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
912 b = xmalloc(sz);
913 x = pkcs1_cryptencode(MP_NEW, m, msz, b, sz, nbits, &p1);
914 rc = mp_pywrap(x);
915end:
916 xfree(b);
917 return (rc);
918}
919
920static PyObject *meth__p1crypt_decode(PyObject *me,
921 PyObject *arg, PyObject *kw)
922{
923 pkcs1 p1;
924 char *ep;
6b54260d 925 Py_ssize_t epsz;
d7ab1bab 926 unsigned long nbits;
927 int n;
928 PyObject *rc = 0;
929 octet *b = 0;
930 size_t sz;
931 mp *x = 0;
932 char *kwlist[] = { "ct", "nbits", "ep", "rng", 0 };
933
934 p1.r = &rand_global; ep = 0; epsz = 0;
935 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|s#O&:decode", kwlist,
936 convmp, &x, convulong, &nbits,
937 &ep, &epsz, convgrand, &p1.r))
938 goto end;
939 sz = (nbits + 7)/8;
940 p1.ep = ep; p1.epsz = epsz;
941 if (epsz + 11 > sz) VALERR("buffer underflow");
942 b = xmalloc(sz);
943 if ((n = pkcs1_cryptdecode(x, b, sz, nbits, &p1)) < 0)
944 VALERR("decryption failed");
945 rc = bytestring_pywrap(b, n);
946end:
947 mp_drop(x);
948 xfree(b);
949 return (rc);
950}
951
952static PyObject *meth__p1sig_encode(PyObject *me,
953 PyObject *arg, PyObject *kw)
954{
955 pkcs1 p1;
956 char *m, *ep;
6b54260d 957 Py_ssize_t msz, epsz;
d7ab1bab 958 unsigned long nbits;
959 PyObject *rc = 0;
960 octet *b = 0;
961 size_t sz;
962 mp *x;
963 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
964
965 p1.r = &rand_global; ep = 0; epsz = 0;
966 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
967 &m, &msz, convulong, &nbits,
968 &ep, &epsz, convgrand, &p1.r))
969 goto end;
970 sz = (nbits + 7)/8;
971 p1.ep = ep; p1.epsz = epsz;
972 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
973 b = xmalloc(sz);
974 x = pkcs1_sigencode(MP_NEW, m, msz, b, sz, nbits, &p1);
975 rc = mp_pywrap(x);
976end:
977 xfree(b);
978 return (rc);
979}
980
981static PyObject *meth__p1sig_decode(PyObject *me,
982 PyObject *arg, PyObject *kw)
983{
984 pkcs1 p1;
985 char *ep;
6b54260d 986 Py_ssize_t epsz;
d7ab1bab 987 unsigned long nbits;
988 int n;
989 PyObject *hukairz;
990 PyObject *rc = 0;
991 octet *b = 0;
992 size_t sz;
993 mp *x = 0;
994 char *kwlist[] = { "msg", "sig", "nbits", "ep", "rng", 0 };
995
996 p1.r = &rand_global; ep = 0; epsz = 0;
997 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&|s#O&:decode", kwlist,
998 &hukairz, convmp, &x, convulong, &nbits,
999 &ep, &epsz, convgrand, &p1.r))
1000 goto end;
1001 sz = (nbits + 7)/8;
1002 p1.ep = ep; p1.epsz = epsz;
1003 if (epsz + 10 > sz) VALERR("buffer underflow");
1004 b = xmalloc(sz);
1005 if ((n = pkcs1_sigdecode(x, 0, 0, b, sz, nbits, &p1)) < 0)
1006 VALERR("verification failed");
1007 rc = bytestring_pywrap(b, n);
1008end:
1009 mp_drop(x);
1010 xfree(b);
1011 return (rc);
1012}
1013
1014static PyObject *meth__oaep_encode(PyObject *me,
1015 PyObject *arg, PyObject *kw)
1016{
1017 oaep o;
1018 char *m, *ep;
6b54260d 1019 Py_ssize_t msz, epsz;
d7ab1bab 1020 unsigned long nbits;
1021 PyObject *rc = 0;
1022 octet *b = 0;
1023 size_t sz;
1024 mp *x;
1025 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "ep", "rng", 0 };
1026
1027 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1028 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&s#O&:encode", kwlist,
1029 &m, &msz, convulong, &nbits,
1030 convgccipher, &o.cc,
1031 convgchash, &o.ch,
1032 &ep, &epsz,
1033 convgrand, &o.r))
1034 goto end;
1035 sz = (nbits + 7)/8;
1036 o.ep = ep; o.epsz = epsz;
1037 if (2 * o.ch->hashsz + 2 + msz > sz) VALERR("buffer underflow");
1038 b = xmalloc(sz);
1039 x = oaep_encode(MP_NEW, m, msz, b, sz, nbits, &o);
1040 rc = mp_pywrap(x);
1041end:
1042 xfree(b);
1043 return (rc);
1044}
1045
1046static PyObject *meth__oaep_decode(PyObject *me,
1047 PyObject *arg, PyObject *kw)
1048{
1049 oaep o;
1050 char *ep;
6b54260d 1051 Py_ssize_t epsz;
d7ab1bab 1052 unsigned long nbits;
1053 int n;
1054 PyObject *rc = 0;
1055 octet *b = 0;
1056 size_t sz;
1057 mp *x = 0;
1058 char *kwlist[] = { "ct", "nbits", "mgf", "hash", "ep", "rng", 0 };
1059
1060 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1061 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&s#O&:decode", kwlist,
1062 convmp, &x, convulong, &nbits,
1063 convgccipher, &o.cc,
1064 convgchash, &o.ch,
1065 &ep, &epsz,
1066 convgrand, &o.r))
1067 goto end;
1068 sz = (nbits + 7)/8;
1069 o.ep = ep; o.epsz = epsz;
1070 if (2 * o.ch->hashsz > sz) VALERR("buffer underflow");
1071 b = xmalloc(sz);
1072 if ((n = oaep_decode(x, b, sz, nbits, &o)) < 0)
1073 VALERR("decryption failed");
1074 rc = bytestring_pywrap(b, n);
1075end:
1076 mp_drop(x);
1077 xfree(b);
1078 return (rc);
1079}
1080
1081static PyObject *meth__pss_encode(PyObject *me,
1082 PyObject *arg, PyObject *kw)
1083{
1084 pss p;
1085 char *m;
6b54260d 1086 Py_ssize_t msz;
d7ab1bab 1087 unsigned long nbits;
1088 PyObject *rc = 0;
1089 octet *b = 0;
1090 size_t sz;
1091 mp *x = 0;
1092 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1093
1094 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1095 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&O&O&:encode", kwlist,
1096 &m, &msz, convulong, &nbits,
1097 convgccipher, &p.cc,
1098 convgchash, &p.ch,
1099 convszt, &p.ssz,
1100 convgrand, &p.r))
1101 goto end;
1102 sz = (nbits + 7)/8;
1103 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1104 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1105 b = xmalloc(sz);
1106 x = pss_encode(MP_NEW, m, msz, b, sz, nbits, &p);
1107 rc = mp_pywrap(x);
1108end:
1109 xfree(b);
1110 return (rc);
1111}
1112
1113static PyObject *meth__pss_decode(PyObject *me,
1114 PyObject *arg, PyObject *kw)
1115{
1116 pss p;
1117 char *m;
6b54260d 1118 Py_ssize_t msz;
d7ab1bab 1119 unsigned long nbits;
1120 PyObject *rc = 0;
1121 octet *b = 0;
1122 size_t sz;
1123 int n;
1124 mp *x = 0;
1125 char *kwlist[] =
1126 { "msg", "sig", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1127
1128 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1129 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&O&|O&O&O&O&:decode", kwlist,
1130 &m, &msz, convmp, &x, convulong, &nbits,
1131 convgccipher, &p.cc,
1132 convgchash, &p.ch,
1133 convszt, &p.ssz,
1134 convgrand, &p.r))
1135 goto end;
1136 sz = (nbits + 7)/8;
1137 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1138 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1139 b = xmalloc(sz);
1140 if ((n = pss_decode(x, m, msz, b, sz, nbits, &p)) < 0)
1141 VALERR("verification failed");
1142 rc = Py_None; Py_INCREF(rc);
1143end:
1144 mp_drop(x);
1145 xfree(b);
1146 return (rc);
1147}
1148
eb8aa4ec 1149/*----- X25519 and related algorithms -------------------------------------*/
848ba392 1150
34bea186
MW		 1151#define XDHS(_) \
1152 _(X25519, x25519) \
1153 _(X448, x448)
1154
1155#define DEFXDH(X, x) \
1156 static PyObject *meth_##x(PyObject *me, PyObject *arg) \
1157 { \
1158 const char *k, *p; \
1159 Py_ssize_t ksz, psz; \
1160 PyObject *rc = 0; \
1161 if (!PyArg_ParseTuple(arg, "s#s#:" #x, &k, &ksz, &p, &psz)) \
1162 goto end; \
1163 if (ksz != X##_KEYSZ) VALERR("bad key length"); \
1164 if (psz != X##_PUBSZ) VALERR("bad public length"); \
1165 rc = bytestring_pywrap(0, X##_OUTSZ); \
1166 x((octet *)PyString_AS_STRING(rc), \
1167 (const octet *)k, (const octet *)p); \
1168 return (rc); \
1169 end: \
1170 return (0); \
1171 }
1172XDHS(DEFXDH)
1173#undef DEFXDH
eb8aa4ec 1174
dca3bdfd 1175/*----- Ed25519 and related algorithms ------------------------------------*/
dafb2da4 1176
dca3bdfd 1177#define EDDSAS(_) \
eee202c3
MW		 1178 _(ED25519, ed25519, -1, ctx) \
1179 _(ED448, ed448, 0, )
dafb2da4 1180
5c4c0231 1181#define DEFEDDSA(ED, ed, phdflt, sigver) \
dca3bdfd
MW		 1182 \
1183 static PyObject *meth_##ed##_pubkey(PyObject *me, PyObject *arg) \
1184 { \
1185 const char *k; \
1186 Py_ssize_t ksz; \
1187 PyObject *rc = 0; \
1188 if (!PyArg_ParseTuple(arg, "s#:" #ed "_pubkey", &k, &ksz)) \
1189 goto end; \
1190 rc = bytestring_pywrap(0, ED##_PUBSZ); \
1191 ed##_pubkey((octet *)PyString_AS_STRING(rc), k, ksz); \
1192 return (rc); \
1193 end: \
1194 return (0); \
1195 } \
1196 \
1197 static PyObject *meth_##ed##_sign(PyObject *me, PyObject *arg, \
1198 PyObject *kw) \
1199 { \
5c4c0231
MW		 1200 const char *k, *p = 0, *c = 0, *m; \
1201 Py_ssize_t ksz, psz, csz = 0, msz; \
1202 int ph = phdflt; \
dca3bdfd
MW		 1203 PyObject *rc = 0; \
1204 octet pp[ED##_PUBSZ]; \
5c4c0231 1205 char *kwlist[] = { "key", "msg", "pub", "perso", "phflag", 0 }; \
dca3bdfd 1206 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
5c4c0231 1207 "s#s#|s#s#O&:" #ed "_sign", \
dca3bdfd 1208 kwlist, \
5c4c0231
MW		 1209 &k, &ksz, &m, &msz, &p, &psz, \
1210 &c, &csz, convbool, &ph)) \
dca3bdfd
MW		 1211 goto end; \
1212 if (p && psz != ED##_PUBSZ) VALERR("bad public length"); \
5c4c0231
MW		 1213 if (c && csz > ED##_MAXPERSOSZ) \
1214 VALERR("personalization string too long"); \
1215 if (c && ph == -1) ph = 0; \
dca3bdfd
MW		 1216 if (!p) { p = (const char *)pp; ed##_pubkey(pp, k, ksz); } \
1217 rc = bytestring_pywrap(0, ED##_SIGSZ); \
5c4c0231
MW		 1218 ed##sigver##_sign((octet *)PyString_AS_STRING(rc), k, ksz, \
1219 (const octet *)p, ph, c, csz, m, msz); \
dca3bdfd
MW		 1220 return (rc); \
1221 end: \
1222 return (0); \
1223 } \
1224 \
1225 static PyObject *meth_##ed##_verify(PyObject *me, \
1226 PyObject *arg, PyObject *kw) \
1227 { \
5c4c0231
MW		 1228 const char *p, *c = 0, *m, *s; \
1229 Py_ssize_t psz, csz = 0, msz, ssz; \
1230 int ph = phdflt; \
dca3bdfd 1231 PyObject *rc = 0; \
5c4c0231 1232 char *kwlist[] = { "pub", "msg", "sig", "perso", "phflag", 0 }; \
dca3bdfd 1233 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
5c4c0231 1234 "s#s#s#|s#O&:" #ed "_verify", \
dca3bdfd 1235 kwlist, \
5c4c0231
MW		 1236 &p, &psz, &m, &msz, &s, &ssz, \
1237 &c, &csz, convbool, &ph)) \
dca3bdfd
MW		 1238 goto end; \
1239 if (psz != ED##_PUBSZ) VALERR("bad public length"); \
1240 if (ssz != ED##_SIGSZ) VALERR("bad signature length"); \
5c4c0231
MW		 1241 if (c && csz > ED##_MAXPERSOSZ) \
1242 VALERR("personalization string too long"); \
1243 if (c && ph == -1) ph = 0; \
1244 rc = getbool(!ed##sigver##_verify((const octet *)p, ph, c, csz, \
1245 m, msz, (const octet *)s)); \
dca3bdfd
MW		 1246 return (rc); \
1247 end: \
1248 return (0); \
1249 }
1250EDDSAS(DEFEDDSA)
1251#undef DEFEDDSA
dafb2da4 1252
d7ab1bab 1253/*----- Global stuff ------------------------------------------------------*/
1254
1255static PyMethodDef methods[] = {
1256#define METHNAME(name) meth_##name
1257 KWMETH(_p1crypt_encode, 0)
1258 KWMETH(_p1crypt_decode, 0)
1259 KWMETH(_p1sig_encode, 0)
1260 KWMETH(_p1sig_decode, 0)
1261 KWMETH(_oaep_encode, 0)
1262 KWMETH(_oaep_decode, 0)
1263 KWMETH(_pss_encode, 0)
1264 KWMETH(_pss_decode, 0)
1265 KWMETH(_RSAPriv_generate, "\
1df8d5fe 1266generate(NBITS, [event = pgen_nullev], [rng = rand], [nsteps = 0]) -> R")
34bea186
MW		 1267#define DEFMETH(X, x) \
1268 METH (x, "\
1269" #x "(KEY, PUBLIC) -> SHARED")
1270 XDHS(DEFMETH)
1271#undef DEFMETH
5c4c0231 1272#define DEFMETH(ED, ed, phdflt, sigver) \
dca3bdfd
MW		 1273 METH (ed##_pubkey, "\
1274" #ed "_pubkey(KEY) -> PUBLIC") \
1275 KWMETH(ed##_sign, "\
1df8d5fe
MW		 1276" #ed "_sign(KEY, MSG, [pub = PUBLIC], " \
1277 "[perso = STRING], [phflag = BOOL]) -> SIG") \
dca3bdfd
MW		 1278 KWMETH(ed##_verify, "\
1279" #ed "_verify(PUBLIC, MSG, SIG, " \
1df8d5fe 1280 "[perso = STRING], [phflag = BOOL]) -> BOOL")
dca3bdfd
MW		 1281 EDDSAS(DEFMETH)
1282#undef DEFMETH
d7ab1bab 1283#undef METHNAME
1284 { 0 }
1285};
1286
1287void pubkey_pyinit(void)
1288{
1289 INITTYPE(dsapub, root);
1290 INITTYPE(dsapriv, dsapub);
1291 INITTYPE(kcdsapub, root);
1292 INITTYPE(kcdsapriv, kcdsapub);
1293 INITTYPE(rsapub, root);
1294 INITTYPE(rsapriv, rsapub);
1295 addmethods(methods);
1296}
1297
1298void pubkey_pyinsert(PyObject *mod)
1299{
1300 INSERT("DSAPub", dsapub_pytype);
1301 INSERT("DSAPriv", dsapriv_pytype);
1302 INSERT("KCDSAPub", kcdsapub_pytype);
1303 INSERT("KCDSAPriv", kcdsapriv_pytype);
1304 INSERT("RSAPub", rsapub_pytype);
1305 INSERT("RSAPriv", rsapriv_pytype);
1306}
1307
1308/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings