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[catacomb-python] / pubkey.c
CommitLineData
d7ab1bab 1/* -*-c-*-
d7ab1bab 2 *
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
203 KWMETH(sign, "D.sign(MSG, k = K) -> R, S")
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
440 KWMETH(sign, "D.sign(MSG, k = K) -> R, S")
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;
d7ab1bab 736 pgev evt = { 0 };
084e6c29 737 char *kwlist[] = { "class", "nbits", "event", "rng", "nsteps", "e", 0 };
d7ab1bab 738 PyObject *rc = 0;
739
084e6c29 740 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&O&:generate", kwlist,
d7ab1bab 741 &me, convuint, &nbits, convpgev, &evt,
084e6c29
MW		 742 convgrand, &r, convuint, &n,
743 convmp, &e))
d7ab1bab 744 goto end;
084e6c29
MW		 745 if (e) MP_COPY(e);
746 else e = mp_fromulong(MP_NEW, 65537);
747 if (rsa_gen_e(&rp, nbits, e, r, n, evt.proc, evt.ctx))
d7ab1bab 748 PGENERR;
749 rc = rsapriv_pywrap(&rp);
750end:
751 droppgev(&evt);
084e6c29 752 mp_drop(e);
d7ab1bab 753 return (rc);
754}
755
756static PyGetSetDef rsapub_pygetset[] = {
757#define GETSETNAME(op, name) rsa##op##_##name
758 GET (n, "R.n -> N")
759 GET (e, "R.e -> E")
760#undef GETSETNAME
761 { 0 }
762};
763
764static PyMethodDef rsapub_pymethods[] = {
765#define METHNAME(name) rsameth_##name
766 METH (pubop, "R.pubop(X) -> X^E (mod N)")
767#undef METHNAME
768 { 0 }
769};
770
771static PyGetSetDef rsapriv_pygetset[] = {
772#define GETSETNAME(op, name) rsa##op##_##name
773 GET (d, "R.d -> D")
774 GET (p, "R.p -> P")
775 GET (q, "R.q -> Q")
776 GET (dp, "R.dp -> D mod (P - 1)")
777 GET (dq, "R.dq -> D mod (Q - 1)")
778 GET (q_inv, "R.q_inv -> Q^{-1} mod P")
779 GETSET(rng, "R.rng -> random number source for blinding")
780#undef GETSETNAME
781 { 0 }
782};
783
784static PyMethodDef rsapriv_pymethods[] = {
785#define METHNAME(name) rsameth_##name
786 KWMETH(privop, "R.privop(X, rng = None) -> X^D (mod N)")
787#undef METHNAME
788 { 0 }
789};
790
791static PyTypeObject rsapub_pytype_skel = {
6d4db0bf 792 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 793 "RSAPub", /* @tp_name@ */
d7ab1bab 794 sizeof(rsapub_pyobj), /* @tp_basicsize@ */
795 0, /* @tp_itemsize@ */
796
797 rsapub_pydealloc, /* @tp_dealloc@ */
798 0, /* @tp_print@ */
799 0, /* @tp_getattr@ */
800 0, /* @tp_setattr@ */
801 0, /* @tp_compare@ */
802 0, /* @tp_repr@ */
803 0, /* @tp_as_number@ */
804 0, /* @tp_as_sequence@ */
805 0, /* @tp_as_mapping@ */
806 0, /* @tp_hash@ */
807 0, /* @tp_call@ */
808 0, /* @tp_str@ */
809 0, /* @tp_getattro@ */
810 0, /* @tp_setattro@ */
811 0, /* @tp_as_buffer@ */
812 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
813 Py_TPFLAGS_BASETYPE,
814
815 /* @tp_doc@ */
816"RSA public key information.",
817
818 0, /* @tp_traverse@ */
819 0, /* @tp_clear@ */
820 0, /* @tp_richcompare@ */
821 0, /* @tp_weaklistoffset@ */
822 0, /* @tp_iter@ */
963a6148 823 0, /* @tp_iternext@ */
d7ab1bab 824 rsapub_pymethods, /* @tp_methods@ */
825 0, /* @tp_members@ */
826 rsapub_pygetset, /* @tp_getset@ */
827 0, /* @tp_base@ */
828 0, /* @tp_dict@ */
829 0, /* @tp_descr_get@ */
830 0, /* @tp_descr_set@ */
831 0, /* @tp_dictoffset@ */
832 0, /* @tp_init@ */
833 PyType_GenericAlloc, /* @tp_alloc@ */
834 rsapub_pynew, /* @tp_new@ */
3aa33042 835 0, /* @tp_free@ */
d7ab1bab 836 0 /* @tp_is_gc@ */
837};
838
839static PyTypeObject rsapriv_pytype_skel = {
6d4db0bf 840 PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3 841 "RSAPriv", /* @tp_name@ */
d7ab1bab 842 sizeof(rsapriv_pyobj), /* @tp_basicsize@ */
843 0, /* @tp_itemsize@ */
844
845 rsapriv_pydealloc, /* @tp_dealloc@ */
846 0, /* @tp_print@ */
847 0, /* @tp_getattr@ */
848 0, /* @tp_setattr@ */
849 0, /* @tp_compare@ */
850 0, /* @tp_repr@ */
851 0, /* @tp_as_number@ */
852 0, /* @tp_as_sequence@ */
853 0, /* @tp_as_mapping@ */
854 0, /* @tp_hash@ */
855 0, /* @tp_call@ */
856 0, /* @tp_str@ */
857 0, /* @tp_getattro@ */
858 0, /* @tp_setattro@ */
859 0, /* @tp_as_buffer@ */
860 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
861 Py_TPFLAGS_BASETYPE,
862
863 /* @tp_doc@ */
864"RSA private key information.",
865
866 0, /* @tp_traverse@ */
867 0, /* @tp_clear@ */
868 0, /* @tp_richcompare@ */
869 0, /* @tp_weaklistoffset@ */
870 0, /* @tp_iter@ */
963a6148 871 0, /* @tp_iternext@ */
d7ab1bab 872 rsapriv_pymethods, /* @tp_methods@ */
873 0, /* @tp_members@ */
874 rsapriv_pygetset, /* @tp_getset@ */
875 0, /* @tp_base@ */
876 0, /* @tp_dict@ */
877 0, /* @tp_descr_get@ */
878 0, /* @tp_descr_set@ */
879 0, /* @tp_dictoffset@ */
880 0, /* @tp_init@ */
881 PyType_GenericAlloc, /* @tp_alloc@ */
882 rsapriv_pynew, /* @tp_new@ */
3aa33042 883 0, /* @tp_free@ */
d7ab1bab 884 0 /* @tp_is_gc@ */
885};
886
887/*----- RSA padding schemes -----------------------------------------------*/
888
889static PyObject *meth__p1crypt_encode(PyObject *me,
890 PyObject *arg, PyObject *kw)
891{
892 pkcs1 p1;
893 char *m, *ep;
6b54260d 894 Py_ssize_t msz, epsz;
d7ab1bab 895 unsigned long nbits;
896 PyObject *rc = 0;
897 octet *b = 0;
898 size_t sz;
899 mp *x;
900 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
901
902 p1.r = &rand_global; ep = 0; epsz = 0;
903 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
904 &m, &msz, convulong, &nbits,
905 &ep, &epsz, convgrand, &p1.r))
906 goto end;
907 sz = (nbits + 7)/8;
908 p1.ep = ep; p1.epsz = epsz;
909 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
910 b = xmalloc(sz);
911 x = pkcs1_cryptencode(MP_NEW, m, msz, b, sz, nbits, &p1);
912 rc = mp_pywrap(x);
913end:
914 xfree(b);
915 return (rc);
916}
917
918static PyObject *meth__p1crypt_decode(PyObject *me,
919 PyObject *arg, PyObject *kw)
920{
921 pkcs1 p1;
922 char *ep;
6b54260d 923 Py_ssize_t epsz;
d7ab1bab 924 unsigned long nbits;
925 int n;
926 PyObject *rc = 0;
927 octet *b = 0;
928 size_t sz;
929 mp *x = 0;
930 char *kwlist[] = { "ct", "nbits", "ep", "rng", 0 };
931
932 p1.r = &rand_global; ep = 0; epsz = 0;
933 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|s#O&:decode", kwlist,
934 convmp, &x, convulong, &nbits,
935 &ep, &epsz, convgrand, &p1.r))
936 goto end;
937 sz = (nbits + 7)/8;
938 p1.ep = ep; p1.epsz = epsz;
939 if (epsz + 11 > sz) VALERR("buffer underflow");
940 b = xmalloc(sz);
941 if ((n = pkcs1_cryptdecode(x, b, sz, nbits, &p1)) < 0)
942 VALERR("decryption failed");
943 rc = bytestring_pywrap(b, n);
944end:
945 mp_drop(x);
946 xfree(b);
947 return (rc);
948}
949
950static PyObject *meth__p1sig_encode(PyObject *me,
951 PyObject *arg, PyObject *kw)
952{
953 pkcs1 p1;
954 char *m, *ep;
6b54260d 955 Py_ssize_t msz, epsz;
d7ab1bab 956 unsigned long nbits;
957 PyObject *rc = 0;
958 octet *b = 0;
959 size_t sz;
960 mp *x;
961 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
962
963 p1.r = &rand_global; ep = 0; epsz = 0;
964 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
965 &m, &msz, convulong, &nbits,
966 &ep, &epsz, convgrand, &p1.r))
967 goto end;
968 sz = (nbits + 7)/8;
969 p1.ep = ep; p1.epsz = epsz;
970 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
971 b = xmalloc(sz);
972 x = pkcs1_sigencode(MP_NEW, m, msz, b, sz, nbits, &p1);
973 rc = mp_pywrap(x);
974end:
975 xfree(b);
976 return (rc);
977}
978
979static PyObject *meth__p1sig_decode(PyObject *me,
980 PyObject *arg, PyObject *kw)
981{
982 pkcs1 p1;
983 char *ep;
6b54260d 984 Py_ssize_t epsz;
d7ab1bab 985 unsigned long nbits;
986 int n;
987 PyObject *hukairz;
988 PyObject *rc = 0;
989 octet *b = 0;
990 size_t sz;
991 mp *x = 0;
992 char *kwlist[] = { "msg", "sig", "nbits", "ep", "rng", 0 };
993
994 p1.r = &rand_global; ep = 0; epsz = 0;
995 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&|s#O&:decode", kwlist,
996 &hukairz, convmp, &x, convulong, &nbits,
997 &ep, &epsz, convgrand, &p1.r))
998 goto end;
999 sz = (nbits + 7)/8;
1000 p1.ep = ep; p1.epsz = epsz;
1001 if (epsz + 10 > sz) VALERR("buffer underflow");
1002 b = xmalloc(sz);
1003 if ((n = pkcs1_sigdecode(x, 0, 0, b, sz, nbits, &p1)) < 0)
1004 VALERR("verification failed");
1005 rc = bytestring_pywrap(b, n);
1006end:
1007 mp_drop(x);
1008 xfree(b);
1009 return (rc);
1010}
1011
1012static PyObject *meth__oaep_encode(PyObject *me,
1013 PyObject *arg, PyObject *kw)
1014{
1015 oaep o;
1016 char *m, *ep;
6b54260d 1017 Py_ssize_t msz, epsz;
d7ab1bab 1018 unsigned long nbits;
1019 PyObject *rc = 0;
1020 octet *b = 0;
1021 size_t sz;
1022 mp *x;
1023 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "ep", "rng", 0 };
1024
1025 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1026 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&s#O&:encode", kwlist,
1027 &m, &msz, convulong, &nbits,
1028 convgccipher, &o.cc,
1029 convgchash, &o.ch,
1030 &ep, &epsz,
1031 convgrand, &o.r))
1032 goto end;
1033 sz = (nbits + 7)/8;
1034 o.ep = ep; o.epsz = epsz;
1035 if (2 * o.ch->hashsz + 2 + msz > sz) VALERR("buffer underflow");
1036 b = xmalloc(sz);
1037 x = oaep_encode(MP_NEW, m, msz, b, sz, nbits, &o);
1038 rc = mp_pywrap(x);
1039end:
1040 xfree(b);
1041 return (rc);
1042}
1043
1044static PyObject *meth__oaep_decode(PyObject *me,
1045 PyObject *arg, PyObject *kw)
1046{
1047 oaep o;
1048 char *ep;
6b54260d 1049 Py_ssize_t epsz;
d7ab1bab 1050 unsigned long nbits;
1051 int n;
1052 PyObject *rc = 0;
1053 octet *b = 0;
1054 size_t sz;
1055 mp *x = 0;
1056 char *kwlist[] = { "ct", "nbits", "mgf", "hash", "ep", "rng", 0 };
1057
1058 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1059 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&s#O&:decode", kwlist,
1060 convmp, &x, convulong, &nbits,
1061 convgccipher, &o.cc,
1062 convgchash, &o.ch,
1063 &ep, &epsz,
1064 convgrand, &o.r))
1065 goto end;
1066 sz = (nbits + 7)/8;
1067 o.ep = ep; o.epsz = epsz;
1068 if (2 * o.ch->hashsz > sz) VALERR("buffer underflow");
1069 b = xmalloc(sz);
1070 if ((n = oaep_decode(x, b, sz, nbits, &o)) < 0)
1071 VALERR("decryption failed");
1072 rc = bytestring_pywrap(b, n);
1073end:
1074 mp_drop(x);
1075 xfree(b);
1076 return (rc);
1077}
1078
1079static PyObject *meth__pss_encode(PyObject *me,
1080 PyObject *arg, PyObject *kw)
1081{
1082 pss p;
1083 char *m;
6b54260d 1084 Py_ssize_t msz;
d7ab1bab 1085 unsigned long nbits;
1086 PyObject *rc = 0;
1087 octet *b = 0;
1088 size_t sz;
1089 mp *x = 0;
1090 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1091
1092 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1093 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&O&O&:encode", kwlist,
1094 &m, &msz, convulong, &nbits,
1095 convgccipher, &p.cc,
1096 convgchash, &p.ch,
1097 convszt, &p.ssz,
1098 convgrand, &p.r))
1099 goto end;
1100 sz = (nbits + 7)/8;
1101 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1102 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1103 b = xmalloc(sz);
1104 x = pss_encode(MP_NEW, m, msz, b, sz, nbits, &p);
1105 rc = mp_pywrap(x);
1106end:
1107 xfree(b);
1108 return (rc);
1109}
1110
1111static PyObject *meth__pss_decode(PyObject *me,
1112 PyObject *arg, PyObject *kw)
1113{
1114 pss p;
1115 char *m;
6b54260d 1116 Py_ssize_t msz;
d7ab1bab 1117 unsigned long nbits;
1118 PyObject *rc = 0;
1119 octet *b = 0;
1120 size_t sz;
1121 int n;
1122 mp *x = 0;
1123 char *kwlist[] =
1124 { "msg", "sig", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1125
1126 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1127 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&O&|O&O&O&O&:decode", kwlist,
1128 &m, &msz, convmp, &x, convulong, &nbits,
1129 convgccipher, &p.cc,
1130 convgchash, &p.ch,
1131 convszt, &p.ssz,
1132 convgrand, &p.r))
1133 goto end;
1134 sz = (nbits + 7)/8;
1135 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1136 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1137 b = xmalloc(sz);
1138 if ((n = pss_decode(x, m, msz, b, sz, nbits, &p)) < 0)
1139 VALERR("verification failed");
1140 rc = Py_None; Py_INCREF(rc);
1141end:
1142 mp_drop(x);
1143 xfree(b);
1144 return (rc);
1145}
1146
eb8aa4ec 1147/*----- X25519 and related algorithms -------------------------------------*/
848ba392 1148
34bea186
MW		 1149#define XDHS(_) \
1150 _(X25519, x25519) \
1151 _(X448, x448)
1152
1153#define DEFXDH(X, x) \
1154 static PyObject *meth_##x(PyObject *me, PyObject *arg) \
1155 { \
1156 const char *k, *p; \
1157 Py_ssize_t ksz, psz; \
1158 PyObject *rc = 0; \
1159 if (!PyArg_ParseTuple(arg, "s#s#:" #x, &k, &ksz, &p, &psz)) \
1160 goto end; \
1161 if (ksz != X##_KEYSZ) VALERR("bad key length"); \
1162 if (psz != X##_PUBSZ) VALERR("bad public length"); \
1163 rc = bytestring_pywrap(0, X##_OUTSZ); \
1164 x((octet *)PyString_AS_STRING(rc), \
1165 (const octet *)k, (const octet *)p); \
1166 return (rc); \
1167 end: \
1168 return (0); \
1169 }
1170XDHS(DEFXDH)
1171#undef DEFXDH
eb8aa4ec 1172
dca3bdfd 1173/*----- Ed25519 and related algorithms ------------------------------------*/
dafb2da4 1174
dca3bdfd 1175#define EDDSAS(_) \
eee202c3
MW		 1176 _(ED25519, ed25519, -1, ctx) \
1177 _(ED448, ed448, 0, )
dafb2da4 1178
5c4c0231 1179#define DEFEDDSA(ED, ed, phdflt, sigver) \
dca3bdfd
MW		 1180 \
1181 static PyObject *meth_##ed##_pubkey(PyObject *me, PyObject *arg) \
1182 { \
1183 const char *k; \
1184 Py_ssize_t ksz; \
1185 PyObject *rc = 0; \
1186 if (!PyArg_ParseTuple(arg, "s#:" #ed "_pubkey", &k, &ksz)) \
1187 goto end; \
1188 rc = bytestring_pywrap(0, ED##_PUBSZ); \
1189 ed##_pubkey((octet *)PyString_AS_STRING(rc), k, ksz); \
1190 return (rc); \
1191 end: \
1192 return (0); \
1193 } \
1194 \
1195 static PyObject *meth_##ed##_sign(PyObject *me, PyObject *arg, \
1196 PyObject *kw) \
1197 { \
5c4c0231
MW		 1198 const char *k, *p = 0, *c = 0, *m; \
1199 Py_ssize_t ksz, psz, csz = 0, msz; \
1200 int ph = phdflt; \
dca3bdfd
MW		 1201 PyObject *rc = 0; \
1202 octet pp[ED##_PUBSZ]; \
5c4c0231 1203 char *kwlist[] = { "key", "msg", "pub", "perso", "phflag", 0 }; \
dca3bdfd 1204 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
5c4c0231 1205 "s#s#|s#s#O&:" #ed "_sign", \
dca3bdfd 1206 kwlist, \
5c4c0231
MW		 1207 &k, &ksz, &m, &msz, &p, &psz, \
1208 &c, &csz, convbool, &ph)) \
dca3bdfd
MW		 1209 goto end; \
1210 if (p && psz != ED##_PUBSZ) VALERR("bad public length"); \
5c4c0231
MW		 1211 if (c && csz > ED##_MAXPERSOSZ) \
1212 VALERR("personalization string too long"); \
1213 if (c && ph == -1) ph = 0; \
dca3bdfd
MW		 1214 if (!p) { p = (const char *)pp; ed##_pubkey(pp, k, ksz); } \
1215 rc = bytestring_pywrap(0, ED##_SIGSZ); \
5c4c0231
MW		 1216 ed##sigver##_sign((octet *)PyString_AS_STRING(rc), k, ksz, \
1217 (const octet *)p, ph, c, csz, m, msz); \
dca3bdfd
MW		 1218 return (rc); \
1219 end: \
1220 return (0); \
1221 } \
1222 \
1223 static PyObject *meth_##ed##_verify(PyObject *me, \
1224 PyObject *arg, PyObject *kw) \
1225 { \
5c4c0231
MW		 1226 const char *p, *c = 0, *m, *s; \
1227 Py_ssize_t psz, csz = 0, msz, ssz; \
1228 int ph = phdflt; \
dca3bdfd 1229 PyObject *rc = 0; \
5c4c0231 1230 char *kwlist[] = { "pub", "msg", "sig", "perso", "phflag", 0 }; \
dca3bdfd 1231 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
5c4c0231 1232 "s#s#s#|s#O&:" #ed "_verify", \
dca3bdfd 1233 kwlist, \
5c4c0231
MW		 1234 &p, &psz, &m, &msz, &s, &ssz, \
1235 &c, &csz, convbool, &ph)) \
dca3bdfd
MW		 1236 goto end; \
1237 if (psz != ED##_PUBSZ) VALERR("bad public length"); \
1238 if (ssz != ED##_SIGSZ) VALERR("bad signature length"); \
5c4c0231
MW		 1239 if (c && csz > ED##_MAXPERSOSZ) \
1240 VALERR("personalization string too long"); \
1241 if (c && ph == -1) ph = 0; \
1242 rc = getbool(!ed##sigver##_verify((const octet *)p, ph, c, csz, \
1243 m, msz, (const octet *)s)); \
dca3bdfd
MW		 1244 return (rc); \
1245 end: \
1246 return (0); \
1247 }
1248EDDSAS(DEFEDDSA)
1249#undef DEFEDDSA
dafb2da4 1250
d7ab1bab 1251/*----- Global stuff ------------------------------------------------------*/
1252
1253static PyMethodDef methods[] = {
1254#define METHNAME(name) meth_##name
1255 KWMETH(_p1crypt_encode, 0)
1256 KWMETH(_p1crypt_decode, 0)
1257 KWMETH(_p1sig_encode, 0)
1258 KWMETH(_p1sig_decode, 0)
1259 KWMETH(_oaep_encode, 0)
1260 KWMETH(_oaep_decode, 0)
1261 KWMETH(_pss_encode, 0)
1262 KWMETH(_pss_decode, 0)
1263 KWMETH(_RSAPriv_generate, "\
1264generate(NBITS, [event = pgen_nullev, rng = rand, nsteps = 0]) -> R")
34bea186
MW		 1265#define DEFMETH(X, x) \
1266 METH (x, "\
1267" #x "(KEY, PUBLIC) -> SHARED")
1268 XDHS(DEFMETH)
1269#undef DEFMETH
5c4c0231 1270#define DEFMETH(ED, ed, phdflt, sigver) \
dca3bdfd
MW		 1271 METH (ed##_pubkey, "\
1272" #ed "_pubkey(KEY) -> PUBLIC") \
1273 KWMETH(ed##_sign, "\
1274" #ed "_sign(KEY, MSG, [pub = PUBLIC, " \
1275 "perso = STRING, phflag = BOOL]) -> SIG") \
1276 KWMETH(ed##_verify, "\
1277" #ed "_verify(PUBLIC, MSG, SIG, " \
1278 "[perso = STRING, phflag = BOOL]) -> BOOL")
1279 EDDSAS(DEFMETH)
1280#undef DEFMETH
d7ab1bab 1281#undef METHNAME
1282 { 0 }
1283};
1284
1285void pubkey_pyinit(void)
1286{
1287 INITTYPE(dsapub, root);
1288 INITTYPE(dsapriv, dsapub);
1289 INITTYPE(kcdsapub, root);
1290 INITTYPE(kcdsapriv, kcdsapub);
1291 INITTYPE(rsapub, root);
1292 INITTYPE(rsapriv, rsapub);
1293 addmethods(methods);
1294}
1295
1296void pubkey_pyinsert(PyObject *mod)
1297{
1298 INSERT("DSAPub", dsapub_pytype);
1299 INSERT("DSAPriv", dsapriv_pytype);
1300 INSERT("KCDSAPub", kcdsapub_pytype);
1301 INSERT("KCDSAPriv", kcdsapriv_pytype);
1302 INSERT("RSAPub", rsapub_pytype);
1303 INSERT("RSAPriv", rsapriv_pytype);
1304}
1305
1306/*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings