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*.c: Spruce up class docstrings.
[catacomb-python] / pubkey.c
1 /* -*-c-*-
2 *
3 * Public-key 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
31 /*----- DSA and similar ---------------------------------------------------*/
32
33 typedef struct dsa_pyobj {
34 PyObject_HEAD
35 PyObject *G, *u, *p, *rng, *hash;
36 gdsa d;
37 } dsa_pyobj;
38
39 static PyTypeObject *dsapub_pytype, *dsapriv_pytype;
40 static 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
48 static 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);
53 FREEOBJ(me);
54 }
55
56 static PyObject *dsa_setup(PyTypeObject *ty, PyObject *G, PyObject *u,
57 PyObject *p, PyObject *rng, PyObject *hash,
58 void (*calcpub)(group *, ge *, mp *))
59 {
60 dsa_pyobj *g;
61 ge *pp;
62
63 g = PyObject_New(dsa_pyobj, ty);
64 if (p) Py_INCREF(p);
65 if (!u) {
66 g->d.u = 0;
67 u = Py_None;
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 }
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");
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);
85 g->G = G; Py_INCREF(G); g->u = u; g->p = p;
86 g->rng = rng; Py_INCREF(rng); g->hash = hash; Py_INCREF(hash);
87 return ((PyObject *)g);
88 end:
89 if (p) Py_DECREF(p);
90 FREEOBJ(g);
91 return (0);
92 }
93
94 static PyObject *dsapub_pynew(PyTypeObject *ty,
95 PyObject *arg, PyObject *kw)
96 {
97 PyObject *G, *p, *rng = rand_pyobj, *hash = sha_pyobj;
98 PyObject *rc = 0;
99 char *kwlist[] = { "G", "p", "hash", "rng", 0 };
100
101 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
102 group_pytype, &G,
103 ge_pytype, &p,
104 gchash_pytype, &hash,
105 grand_pytype, &rng) ||
106 (rc = dsa_setup(dsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
107 goto end;
108 end:
109 return (rc);
110 }
111
112 static 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
118 static 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
131 static PyObject *dsameth_sign(PyObject *me, PyObject *arg, PyObject *kw)
132 {
133 gdsa_sig s = GDSA_SIG_INIT;
134 char *p;
135 Py_ssize_t n;
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));
147 end:
148 mp_drop(k);
149 return (rc);
150 }
151
152 static PyObject *dsameth_verify(PyObject *me, PyObject *arg)
153 {
154 char *p;
155 Py_ssize_t n;
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)");
164 rc = getbool(!gdsa_verify(DSA_D(me), &s, p));
165 end:
166 mp_drop(s.r);
167 mp_drop(s.s);
168 return (rc);
169 }
170
171 static void dsa_calcpub(group *g, ge *p, mp *u) { G_EXP(g, p, g->g, u); }
172
173 static PyObject *dsapriv_pynew(PyTypeObject *ty,
174 PyObject *arg, PyObject *kw)
175 {
176 PyObject *G, *p = 0, *u, *rng = rand_pyobj, *hash = sha_pyobj;
177 PyObject *rc = 0;
178 char *kwlist[] = { "G", "u", "p", "hash", "rng", 0 };
179
180 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
181 group_pytype, &G,
182 &u,
183 ge_pytype, &p,
184 gchash_pytype, &hash,
185 grand_pytype, &rng) ||
186 (rc = dsa_setup(dsapriv_pytype, G, u, p, rng, hash, dsa_calcpub)) == 0)
187 goto end;
188 end:
189 return (rc);
190 }
191
192 static 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
201 static 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
208 static 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")
213 MEMBER(hash, T_OBJECT, READONLY, "D.hash -> hash class")
214 #undef MEMBERSTRUCT
215 { 0 }
216 };
217
218 static 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
225 static PyTypeObject dsapub_pytype_skel = {
226 PyObject_HEAD_INIT(0) 0, /* Header */
227 "DSAPub", /* @tp_name@ */
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 "DSAPub(GROUP, P, [hash = sha], [rng = rand]): DSA public key.",
251
252 0, /* @tp_traverse@ */
253 0, /* @tp_clear@ */
254 0, /* @tp_richcompare@ */
255 0, /* @tp_weaklistoffset@ */
256 0, /* @tp_iter@ */
257 0, /* @tp_iternext@ */
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@ */
269 0, /* @tp_free@ */
270 0 /* @tp_is_gc@ */
271 };
272
273 static PyTypeObject dsapriv_pytype_skel = {
274 PyObject_HEAD_INIT(0) 0, /* Header */
275 "DSAPriv", /* @tp_name@ */
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 "DSAPriv(GROUP, U, [p = u G], [hash = sha], [rng = rand]): DSA private key.",
299
300 0, /* @tp_traverse@ */
301 0, /* @tp_clear@ */
302 0, /* @tp_richcompare@ */
303 0, /* @tp_weaklistoffset@ */
304 0, /* @tp_iter@ */
305 0, /* @tp_iternext@ */
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@ */
317 0, /* @tp_free@ */
318 0 /* @tp_is_gc@ */
319 };
320
321 static PyObject *kcdsapub_pynew(PyTypeObject *ty,
322 PyObject *arg, PyObject *kw)
323 {
324 PyObject *G, *p, *rng = rand_pyobj, *hash = has160_pyobj;
325 PyObject *rc = 0;
326 char *kwlist[] = { "G", "p", "hash", "rng", 0 };
327
328 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
329 group_pytype, &G,
330 ge_pytype, &p,
331 gchash_pytype, &hash,
332 grand_pytype, &rng) ||
333 (rc = dsa_setup(kcdsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
334 goto end;
335 end:
336 return (rc);
337 }
338
339 static 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
346 static PyObject *kcdsapriv_pynew(PyTypeObject *ty,
347 PyObject *arg, PyObject *kw)
348 {
349 PyObject *G, *u, *p = 0, *rng = rand_pyobj, *hash = has160_pyobj;
350 PyObject *rc = 0;
351 char *kwlist[] = { "G", "u", "p", "hash", "rng", 0 };
352
353 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
354 group_pytype, &G,
355 &u,
356 ge_pytype, &p,
357 gchash_pytype, &hash,
358 grand_pytype, &rng) ||
359 (rc = dsa_setup(kcdsapriv_pytype, G, u, p,
360 rng, hash, kcdsa_calcpub)) == 0)
361 goto end;
362 end:
363 return (rc);
364 }
365
366 static 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
372 static 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
385 static PyObject *kcdsameth_sign(PyObject *me, PyObject *arg, PyObject *kw)
386 {
387 gkcdsa_sig s = GKCDSA_SIG_INIT;
388 char *p;
389 Py_ssize_t n;
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);
400 s.r = (octet *)PyString_AS_STRING(r);
401 gkcdsa_sign(DSA_D(me), &s, p, k);
402 rc = Py_BuildValue("(ON)", r, mp_pywrap(s.s));
403 end:
404 Py_XDECREF(r);
405 mp_drop(k);
406 return (rc);
407 }
408
409 static PyObject *kcdsameth_verify(PyObject *me, PyObject *arg)
410 {
411 char *p;
412 Py_ssize_t n, rn;
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)");
423 rc = getbool(!gkcdsa_verify(DSA_D(me), &s, p));
424 end:
425 mp_drop(s.s);
426 return (rc);
427 }
428
429 static 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
438 static 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
445 static PyTypeObject kcdsapub_pytype_skel = {
446 PyObject_HEAD_INIT(0) 0, /* Header */
447 "KCDSAPub", /* @tp_name@ */
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 "KCDSAPub(GROUP, P, [hash = sha], [rng = rand]): KCDSA public key.",
471
472 0, /* @tp_traverse@ */
473 0, /* @tp_clear@ */
474 0, /* @tp_richcompare@ */
475 0, /* @tp_weaklistoffset@ */
476 0, /* @tp_iter@ */
477 0, /* @tp_iternext@ */
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@ */
489 0, /* @tp_free@ */
490 0 /* @tp_is_gc@ */
491 };
492
493 static PyTypeObject kcdsapriv_pytype_skel = {
494 PyObject_HEAD_INIT(0) 0, /* Header */
495 "KCDSAPriv", /* @tp_name@ */
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 "KCDSAPriv(GROUP, U, [p = u G], [hash = sha], [rng = rand]): KCDSA private key.",
519
520 0, /* @tp_traverse@ */
521 0, /* @tp_clear@ */
522 0, /* @tp_richcompare@ */
523 0, /* @tp_weaklistoffset@ */
524 0, /* @tp_iter@ */
525 0, /* @tp_iternext@ */
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@ */
537 0, /* @tp_free@ */
538 0 /* @tp_is_gc@ */
539 };
540
541 /*----- RSA ---------------------------------------------------------------*/
542
543 typedef 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
552 typedef 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
565 static PyTypeObject *rsapub_pytype, *rsapriv_pytype;
566
567 static 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;
577 if (!MP_ODDP(rp.n)) VALERR("RSA modulus must be even");
578 o = (rsapub_pyobj *)ty->tp_alloc(ty, 0);
579 o->pub = rp;
580 rsa_pubcreate(&o->pubctx, &o->pub);
581 return ((PyObject *)o);
582 end:
583 rsa_pubfree(&rp);
584 return (0);
585 }
586
587 static void rsapub_pydealloc(PyObject *me)
588 {
589 rsa_pubdestroy(RSA_PUBCTX(me));
590 rsa_pubfree(RSA_PUB(me));
591 FREEOBJ(me);
592 }
593
594 static PyObject *rsaget_n(PyObject *me, void *hunoz)
595 { return mp_pywrap(MP_COPY(RSA_PUB(me)->n)); }
596
597 static PyObject *rsaget_e(PyObject *me, void *hunoz)
598 { return mp_pywrap(MP_COPY(RSA_PUB(me)->e)); }
599
600 static 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));
607 end:
608 mp_drop(x);
609 return (rc);
610 }
611
612 static 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
631 PyObject *rsapriv_pywrap(rsa_priv *rp)
632 { return rsapriv_dopywrap(rsapriv_pytype, rp, 0); }
633
634 static 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;
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");
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));
659 end:
660 rsa_privfree(&rp);
661 return (0);
662 }
663
664 static 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));
670 FREEOBJ(me);
671 }
672
673 static PyObject *rsaget_d(PyObject *me, void *hunoz)
674 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->d)); }
675
676 static PyObject *rsaget_p(PyObject *me, void *hunoz)
677 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->p)); }
678
679 static PyObject *rsaget_q(PyObject *me, void *hunoz)
680 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q)); }
681
682 static PyObject *rsaget_dp(PyObject *me, void *hunoz)
683 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dp)); }
684
685 static PyObject *rsaget_dq(PyObject *me, void *hunoz)
686 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dq)); }
687
688 static PyObject *rsaget_q_inv(PyObject *me, void *hunoz)
689 { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q_inv)); }
690
691 static PyObject *rsaget_rng(PyObject *me, void *hunoz)
692 { RETURN_OBJ(RSA_RNG(me)); }
693
694 static int rsaset_rng(PyObject *me, PyObject *val, void *hunoz)
695 {
696 int rc = -1;
697 if (!val)
698 val = Py_None;
699 else if (val != Py_None && !GRAND_PYCHECK(val))
700 TYERR("expected grand or None");
701 Py_DECREF(RSA_RNG(me));
702 RSA_RNG(me) = val;
703 Py_INCREF(val);
704 rc = 0;
705 end:
706 return (rc);
707 }
708
709 static 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));
723 end:
724 mp_drop(x);
725 return (rc);
726 }
727
728 static 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;
735 mp *e = 0;
736 pgev evt = { 0 };
737 char *kwlist[] = { "class", "nbits", "event", "rng", "nsteps", "e", 0 };
738 PyObject *rc = 0;
739
740 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&O&:generate", kwlist,
741 &me, convuint, &nbits, convpgev, &evt,
742 convgrand, &r, convuint, &n,
743 convmp, &e))
744 goto end;
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))
748 PGENERR;
749 rc = rsapriv_pywrap(&rp);
750 end:
751 droppgev(&evt);
752 mp_drop(e);
753 return (rc);
754 }
755
756 static 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
764 static 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
771 static 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
784 static 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
791 static PyTypeObject rsapub_pytype_skel = {
792 PyObject_HEAD_INIT(0) 0, /* Header */
793 "RSAPub", /* @tp_name@ */
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 "RSAPub(N, E): RSA public key.",
817
818 0, /* @tp_traverse@ */
819 0, /* @tp_clear@ */
820 0, /* @tp_richcompare@ */
821 0, /* @tp_weaklistoffset@ */
822 0, /* @tp_iter@ */
823 0, /* @tp_iternext@ */
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@ */
835 0, /* @tp_free@ */
836 0 /* @tp_is_gc@ */
837 };
838
839 static PyTypeObject rsapriv_pytype_skel = {
840 PyObject_HEAD_INIT(0) 0, /* Header */
841 "RSAPriv", /* @tp_name@ */
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 "RSAPriv(..., [rng = rand]): RSA private key.\n\
865 Keywords: n, e, d, p, q, dp, dq, q_inv; must provide enough",
866
867 0, /* @tp_traverse@ */
868 0, /* @tp_clear@ */
869 0, /* @tp_richcompare@ */
870 0, /* @tp_weaklistoffset@ */
871 0, /* @tp_iter@ */
872 0, /* @tp_iternext@ */
873 rsapriv_pymethods, /* @tp_methods@ */
874 0, /* @tp_members@ */
875 rsapriv_pygetset, /* @tp_getset@ */
876 0, /* @tp_base@ */
877 0, /* @tp_dict@ */
878 0, /* @tp_descr_get@ */
879 0, /* @tp_descr_set@ */
880 0, /* @tp_dictoffset@ */
881 0, /* @tp_init@ */
882 PyType_GenericAlloc, /* @tp_alloc@ */
883 rsapriv_pynew, /* @tp_new@ */
884 0, /* @tp_free@ */
885 0 /* @tp_is_gc@ */
886 };
887
888 /*----- RSA padding schemes -----------------------------------------------*/
889
890 static PyObject *meth__p1crypt_encode(PyObject *me,
891 PyObject *arg, PyObject *kw)
892 {
893 pkcs1 p1;
894 char *m, *ep;
895 Py_ssize_t msz, epsz;
896 unsigned long nbits;
897 PyObject *rc = 0;
898 octet *b = 0;
899 size_t sz;
900 mp *x;
901 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
902
903 p1.r = &rand_global; ep = 0; epsz = 0;
904 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
905 &m, &msz, convulong, &nbits,
906 &ep, &epsz, convgrand, &p1.r))
907 goto end;
908 sz = (nbits + 7)/8;
909 p1.ep = ep; p1.epsz = epsz;
910 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
911 b = xmalloc(sz);
912 x = pkcs1_cryptencode(MP_NEW, m, msz, b, sz, nbits, &p1);
913 rc = mp_pywrap(x);
914 end:
915 xfree(b);
916 return (rc);
917 }
918
919 static PyObject *meth__p1crypt_decode(PyObject *me,
920 PyObject *arg, PyObject *kw)
921 {
922 pkcs1 p1;
923 char *ep;
924 Py_ssize_t epsz;
925 unsigned long nbits;
926 int n;
927 PyObject *rc = 0;
928 octet *b = 0;
929 size_t sz;
930 mp *x = 0;
931 char *kwlist[] = { "ct", "nbits", "ep", "rng", 0 };
932
933 p1.r = &rand_global; ep = 0; epsz = 0;
934 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|s#O&:decode", kwlist,
935 convmp, &x, convulong, &nbits,
936 &ep, &epsz, convgrand, &p1.r))
937 goto end;
938 sz = (nbits + 7)/8;
939 p1.ep = ep; p1.epsz = epsz;
940 if (epsz + 11 > sz) VALERR("buffer underflow");
941 b = xmalloc(sz);
942 if ((n = pkcs1_cryptdecode(x, b, sz, nbits, &p1)) < 0)
943 VALERR("decryption failed");
944 rc = bytestring_pywrap(b, n);
945 end:
946 mp_drop(x);
947 xfree(b);
948 return (rc);
949 }
950
951 static PyObject *meth__p1sig_encode(PyObject *me,
952 PyObject *arg, PyObject *kw)
953 {
954 pkcs1 p1;
955 char *m, *ep;
956 Py_ssize_t msz, epsz;
957 unsigned long nbits;
958 PyObject *rc = 0;
959 octet *b = 0;
960 size_t sz;
961 mp *x;
962 char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 };
963
964 p1.r = &rand_global; ep = 0; epsz = 0;
965 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist,
966 &m, &msz, convulong, &nbits,
967 &ep, &epsz, convgrand, &p1.r))
968 goto end;
969 sz = (nbits + 7)/8;
970 p1.ep = ep; p1.epsz = epsz;
971 if (epsz + msz + 11 > sz) VALERR("buffer underflow");
972 b = xmalloc(sz);
973 x = pkcs1_sigencode(MP_NEW, m, msz, b, sz, nbits, &p1);
974 rc = mp_pywrap(x);
975 end:
976 xfree(b);
977 return (rc);
978 }
979
980 static PyObject *meth__p1sig_decode(PyObject *me,
981 PyObject *arg, PyObject *kw)
982 {
983 pkcs1 p1;
984 char *ep;
985 Py_ssize_t epsz;
986 unsigned long nbits;
987 int n;
988 PyObject *hukairz;
989 PyObject *rc = 0;
990 octet *b = 0;
991 size_t sz;
992 mp *x = 0;
993 char *kwlist[] = { "msg", "sig", "nbits", "ep", "rng", 0 };
994
995 p1.r = &rand_global; ep = 0; epsz = 0;
996 if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&|s#O&:decode", kwlist,
997 &hukairz, convmp, &x, convulong, &nbits,
998 &ep, &epsz, convgrand, &p1.r))
999 goto end;
1000 sz = (nbits + 7)/8;
1001 p1.ep = ep; p1.epsz = epsz;
1002 if (epsz + 10 > sz) VALERR("buffer underflow");
1003 b = xmalloc(sz);
1004 if ((n = pkcs1_sigdecode(x, 0, 0, b, sz, nbits, &p1)) < 0)
1005 VALERR("verification failed");
1006 rc = bytestring_pywrap(b, n);
1007 end:
1008 mp_drop(x);
1009 xfree(b);
1010 return (rc);
1011 }
1012
1013 static PyObject *meth__oaep_encode(PyObject *me,
1014 PyObject *arg, PyObject *kw)
1015 {
1016 oaep o;
1017 char *m, *ep;
1018 Py_ssize_t msz, epsz;
1019 unsigned long nbits;
1020 PyObject *rc = 0;
1021 octet *b = 0;
1022 size_t sz;
1023 mp *x;
1024 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "ep", "rng", 0 };
1025
1026 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1027 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&s#O&:encode", kwlist,
1028 &m, &msz, convulong, &nbits,
1029 convgccipher, &o.cc,
1030 convgchash, &o.ch,
1031 &ep, &epsz,
1032 convgrand, &o.r))
1033 goto end;
1034 sz = (nbits + 7)/8;
1035 o.ep = ep; o.epsz = epsz;
1036 if (2 * o.ch->hashsz + 2 + msz > sz) VALERR("buffer underflow");
1037 b = xmalloc(sz);
1038 x = oaep_encode(MP_NEW, m, msz, b, sz, nbits, &o);
1039 rc = mp_pywrap(x);
1040 end:
1041 xfree(b);
1042 return (rc);
1043 }
1044
1045 static PyObject *meth__oaep_decode(PyObject *me,
1046 PyObject *arg, PyObject *kw)
1047 {
1048 oaep o;
1049 char *ep;
1050 Py_ssize_t epsz;
1051 unsigned long nbits;
1052 int n;
1053 PyObject *rc = 0;
1054 octet *b = 0;
1055 size_t sz;
1056 mp *x = 0;
1057 char *kwlist[] = { "ct", "nbits", "mgf", "hash", "ep", "rng", 0 };
1058
1059 o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0;
1060 if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&s#O&:decode", kwlist,
1061 convmp, &x, convulong, &nbits,
1062 convgccipher, &o.cc,
1063 convgchash, &o.ch,
1064 &ep, &epsz,
1065 convgrand, &o.r))
1066 goto end;
1067 sz = (nbits + 7)/8;
1068 o.ep = ep; o.epsz = epsz;
1069 if (2 * o.ch->hashsz > sz) VALERR("buffer underflow");
1070 b = xmalloc(sz);
1071 if ((n = oaep_decode(x, b, sz, nbits, &o)) < 0)
1072 VALERR("decryption failed");
1073 rc = bytestring_pywrap(b, n);
1074 end:
1075 mp_drop(x);
1076 xfree(b);
1077 return (rc);
1078 }
1079
1080 static PyObject *meth__pss_encode(PyObject *me,
1081 PyObject *arg, PyObject *kw)
1082 {
1083 pss p;
1084 char *m;
1085 Py_ssize_t msz;
1086 unsigned long nbits;
1087 PyObject *rc = 0;
1088 octet *b = 0;
1089 size_t sz;
1090 mp *x = 0;
1091 char *kwlist[] = { "msg", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1092
1093 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1094 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&O&O&:encode", kwlist,
1095 &m, &msz, convulong, &nbits,
1096 convgccipher, &p.cc,
1097 convgchash, &p.ch,
1098 convszt, &p.ssz,
1099 convgrand, &p.r))
1100 goto end;
1101 sz = (nbits + 7)/8;
1102 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1103 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1104 b = xmalloc(sz);
1105 x = pss_encode(MP_NEW, m, msz, b, sz, nbits, &p);
1106 rc = mp_pywrap(x);
1107 end:
1108 xfree(b);
1109 return (rc);
1110 }
1111
1112 static PyObject *meth__pss_decode(PyObject *me,
1113 PyObject *arg, PyObject *kw)
1114 {
1115 pss p;
1116 char *m;
1117 Py_ssize_t msz;
1118 unsigned long nbits;
1119 PyObject *rc = 0;
1120 octet *b = 0;
1121 size_t sz;
1122 int n;
1123 mp *x = 0;
1124 char *kwlist[] =
1125 { "msg", "sig", "nbits", "mgf", "hash", "saltsz", "rng", 0 };
1126
1127 p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1;
1128 if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&O&|O&O&O&O&:decode", kwlist,
1129 &m, &msz, convmp, &x, convulong, &nbits,
1130 convgccipher, &p.cc,
1131 convgchash, &p.ch,
1132 convszt, &p.ssz,
1133 convgrand, &p.r))
1134 goto end;
1135 sz = (nbits + 7)/8;
1136 if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz;
1137 if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow");
1138 b = xmalloc(sz);
1139 if ((n = pss_decode(x, m, msz, b, sz, nbits, &p)) < 0)
1140 VALERR("verification failed");
1141 rc = Py_None; Py_INCREF(rc);
1142 end:
1143 mp_drop(x);
1144 xfree(b);
1145 return (rc);
1146 }
1147
1148 /*----- X25519 and related algorithms -------------------------------------*/
1149
1150 #define XDHS(_) \
1151 _(X25519, x25519) \
1152 _(X448, x448)
1153
1154 #define DEFXDH(X, x) \
1155 static PyObject *meth_##x(PyObject *me, PyObject *arg) \
1156 { \
1157 const char *k, *p; \
1158 Py_ssize_t ksz, psz; \
1159 PyObject *rc = 0; \
1160 if (!PyArg_ParseTuple(arg, "s#s#:" #x, &k, &ksz, &p, &psz)) \
1161 goto end; \
1162 if (ksz != X##_KEYSZ) VALERR("bad key length"); \
1163 if (psz != X##_PUBSZ) VALERR("bad public length"); \
1164 rc = bytestring_pywrap(0, X##_OUTSZ); \
1165 x((octet *)PyString_AS_STRING(rc), \
1166 (const octet *)k, (const octet *)p); \
1167 return (rc); \
1168 end: \
1169 return (0); \
1170 }
1171 XDHS(DEFXDH)
1172 #undef DEFXDH
1173
1174 /*----- Ed25519 and related algorithms ------------------------------------*/
1175
1176 #define EDDSAS(_) \
1177 _(ED25519, ed25519, -1, ctx) \
1178 _(ED448, ed448, 0, )
1179
1180 #define DEFEDDSA(ED, ed, phdflt, sigver) \
1181 \
1182 static PyObject *meth_##ed##_pubkey(PyObject *me, PyObject *arg) \
1183 { \
1184 const char *k; \
1185 Py_ssize_t ksz; \
1186 PyObject *rc = 0; \
1187 if (!PyArg_ParseTuple(arg, "s#:" #ed "_pubkey", &k, &ksz)) \
1188 goto end; \
1189 rc = bytestring_pywrap(0, ED##_PUBSZ); \
1190 ed##_pubkey((octet *)PyString_AS_STRING(rc), k, ksz); \
1191 return (rc); \
1192 end: \
1193 return (0); \
1194 } \
1195 \
1196 static PyObject *meth_##ed##_sign(PyObject *me, PyObject *arg, \
1197 PyObject *kw) \
1198 { \
1199 const char *k, *p = 0, *c = 0, *m; \
1200 Py_ssize_t ksz, psz, csz = 0, msz; \
1201 int ph = phdflt; \
1202 PyObject *rc = 0; \
1203 octet pp[ED##_PUBSZ]; \
1204 char *kwlist[] = { "key", "msg", "pub", "perso", "phflag", 0 }; \
1205 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
1206 "s#s#|s#s#O&:" #ed "_sign", \
1207 kwlist, \
1208 &k, &ksz, &m, &msz, &p, &psz, \
1209 &c, &csz, convbool, &ph)) \
1210 goto end; \
1211 if (p && psz != ED##_PUBSZ) VALERR("bad public length"); \
1212 if (c && csz > ED##_MAXPERSOSZ) \
1213 VALERR("personalization string too long"); \
1214 if (c && ph == -1) ph = 0; \
1215 if (!p) { p = (const char *)pp; ed##_pubkey(pp, k, ksz); } \
1216 rc = bytestring_pywrap(0, ED##_SIGSZ); \
1217 ed##sigver##_sign((octet *)PyString_AS_STRING(rc), k, ksz, \
1218 (const octet *)p, ph, c, csz, m, msz); \
1219 return (rc); \
1220 end: \
1221 return (0); \
1222 } \
1223 \
1224 static PyObject *meth_##ed##_verify(PyObject *me, \
1225 PyObject *arg, PyObject *kw) \
1226 { \
1227 const char *p, *c = 0, *m, *s; \
1228 Py_ssize_t psz, csz = 0, msz, ssz; \
1229 int ph = phdflt; \
1230 PyObject *rc = 0; \
1231 char *kwlist[] = { "pub", "msg", "sig", "perso", "phflag", 0 }; \
1232 if (!PyArg_ParseTupleAndKeywords(arg, kw, \
1233 "s#s#s#|s#O&:" #ed "_verify", \
1234 kwlist, \
1235 &p, &psz, &m, &msz, &s, &ssz, \
1236 &c, &csz, convbool, &ph)) \
1237 goto end; \
1238 if (psz != ED##_PUBSZ) VALERR("bad public length"); \
1239 if (ssz != ED##_SIGSZ) VALERR("bad signature length"); \
1240 if (c && csz > ED##_MAXPERSOSZ) \
1241 VALERR("personalization string too long"); \
1242 if (c && ph == -1) ph = 0; \
1243 rc = getbool(!ed##sigver##_verify((const octet *)p, ph, c, csz, \
1244 m, msz, (const octet *)s)); \
1245 return (rc); \
1246 end: \
1247 return (0); \
1248 }
1249 EDDSAS(DEFEDDSA)
1250 #undef DEFEDDSA
1251
1252 /*----- Global stuff ------------------------------------------------------*/
1253
1254 static PyMethodDef methods[] = {
1255 #define METHNAME(name) meth_##name
1256 KWMETH(_p1crypt_encode, 0)
1257 KWMETH(_p1crypt_decode, 0)
1258 KWMETH(_p1sig_encode, 0)
1259 KWMETH(_p1sig_decode, 0)
1260 KWMETH(_oaep_encode, 0)
1261 KWMETH(_oaep_decode, 0)
1262 KWMETH(_pss_encode, 0)
1263 KWMETH(_pss_decode, 0)
1264 KWMETH(_RSAPriv_generate, "\
1265 generate(NBITS, [event = pgen_nullev, rng = rand, nsteps = 0]) -> R")
1266 #define DEFMETH(X, x) \
1267 METH (x, "\
1268 " #x "(KEY, PUBLIC) -> SHARED")
1269 XDHS(DEFMETH)
1270 #undef DEFMETH
1271 #define DEFMETH(ED, ed, phdflt, sigver) \
1272 METH (ed##_pubkey, "\
1273 " #ed "_pubkey(KEY) -> PUBLIC") \
1274 KWMETH(ed##_sign, "\
1275 " #ed "_sign(KEY, MSG, [pub = PUBLIC, " \
1276 "perso = STRING, phflag = BOOL]) -> SIG") \
1277 KWMETH(ed##_verify, "\
1278 " #ed "_verify(PUBLIC, MSG, SIG, " \
1279 "[perso = STRING, phflag = BOOL]) -> BOOL")
1280 EDDSAS(DEFMETH)
1281 #undef DEFMETH
1282 #undef METHNAME
1283 { 0 }
1284 };
1285
1286 void pubkey_pyinit(void)
1287 {
1288 INITTYPE(dsapub, root);
1289 INITTYPE(dsapriv, dsapub);
1290 INITTYPE(kcdsapub, root);
1291 INITTYPE(kcdsapriv, kcdsapub);
1292 INITTYPE(rsapub, root);
1293 INITTYPE(rsapriv, rsapub);
1294 addmethods(methods);
1295 }
1296
1297 void pubkey_pyinsert(PyObject *mod)
1298 {
1299 INSERT("DSAPub", dsapub_pytype);
1300 INSERT("DSAPriv", dsapriv_pytype);
1301 INSERT("KCDSAPub", kcdsapub_pytype);
1302 INSERT("KCDSAPriv", kcdsapriv_pytype);
1303 INSERT("RSAPub", rsapub_pytype);
1304 INSERT("RSAPriv", rsapriv_pytype);
1305 }
1306
1307 /*----- That's all, folks -------------------------------------------------*/
Catacomb cryptographic library -- Python bindings