| 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 | { |
| 59 | dsa_pyobj *g; |
| 60 | |
| 61 | g = PyObject_New(dsa_pyobj, ty); |
| 62 | if (GROUP_G(G) != GE_G(p) && !group_samep(GROUP_G(G), GE_G(p))) |
| 63 | TYERR("public key not from group"); |
| 64 | if (!u) { |
| 65 | g->d.u = 0; |
| 66 | u = Py_None; |
| 67 | } else if ((g->d.u = getmp(u)) == 0) |
| 68 | goto end; |
| 69 | g->d.g = GROUP_G(G); |
| 70 | g->d.p = GE_X(p); |
| 71 | g->d.r = GRAND_R(rng); |
| 72 | g->d.h = GCHASH_CH(hash); |
| 73 | g->G = G; Py_INCREF(G); g->u = u; Py_INCREF(u); g->p = p; Py_INCREF(p); |
| 74 | g->rng = rng; Py_INCREF(rng); g->hash = hash; Py_INCREF(hash); |
| 75 | return ((PyObject *)g); |
| 76 | end: |
| 77 | FREEOBJ(g); |
| 78 | return (0); |
| 79 | } |
| 80 | |
| 81 | static PyObject *dsapub_pynew(PyTypeObject *ty, |
| 82 | PyObject *arg, PyObject *kw) |
| 83 | { |
| 84 | PyObject *G, *p, *u = 0, *rng = rand_pyobj, *hash = sha_pyobj; |
| 85 | PyObject *rc = 0; |
| 86 | char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 }; |
| 87 | |
| 88 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|OO!O!:new", kwlist, |
| 89 | group_pytype, &G, |
| 90 | ge_pytype, &p, |
| 91 | &u, |
| 92 | gchash_pytype, &hash, |
| 93 | grand_pytype, &rng) || |
| 94 | (rc = dsa_setup(dsapub_pytype, G, u, p, rng, hash)) == 0) |
| 95 | goto end; |
| 96 | end: |
| 97 | return (rc); |
| 98 | } |
| 99 | |
| 100 | static PyObject *dsameth_beginhash(PyObject *me, PyObject *arg) |
| 101 | { |
| 102 | if (!PyArg_ParseTuple(arg, ":beginhash")) return (0); |
| 103 | return (ghash_pywrap(DSA_HASH(me), gdsa_beginhash(DSA_D(me)), f_freeme)); |
| 104 | } |
| 105 | |
| 106 | static PyObject *dsameth_endhash(PyObject *me, PyObject *arg) |
| 107 | { |
| 108 | ghash *h; |
| 109 | PyObject *rc; |
| 110 | if (!PyArg_ParseTuple(arg, "O&:endhash", convghash, &h)) return (0); |
| 111 | gdsa_endhash(DSA_D(me), h); |
| 112 | h = GH_COPY(h); |
| 113 | rc = bytestring_pywrap(0, GH_CLASS(h)->hashsz); |
| 114 | GH_DONE(h, PyString_AS_STRING(rc)); |
| 115 | GH_DESTROY(h); |
| 116 | return (rc); |
| 117 | } |
| 118 | |
| 119 | static PyObject *dsameth_sign(PyObject *me, PyObject *arg, PyObject *kw) |
| 120 | { |
| 121 | gdsa_sig s = GDSA_SIG_INIT; |
| 122 | char *p; |
| 123 | int n; |
| 124 | mp *k = 0; |
| 125 | PyObject *rc = 0; |
| 126 | char *kwlist[] = { "msg", "k", 0 }; |
| 127 | |
| 128 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:sign", kwlist, |
| 129 | &p, &n, convmp, &k)) |
| 130 | goto end; |
| 131 | if (n != DSA_D(me)->h->hashsz) |
| 132 | VALERR("bad message length (doesn't match hash size)"); |
| 133 | gdsa_sign(DSA_D(me), &s, p, k); |
| 134 | rc = Py_BuildValue("(NN)", mp_pywrap(s.r), mp_pywrap(s.s)); |
| 135 | end: |
| 136 | mp_drop(k); |
| 137 | return (rc); |
| 138 | } |
| 139 | |
| 140 | static PyObject *dsameth_verify(PyObject *me, PyObject *arg) |
| 141 | { |
| 142 | char *p; |
| 143 | int n; |
| 144 | gdsa_sig s = GDSA_SIG_INIT; |
| 145 | PyObject *rc = 0; |
| 146 | |
| 147 | if (!PyArg_ParseTuple(arg, "s#(O&O&):verify", |
| 148 | &p, &n, convmp, &s.r, convmp, &s.s)) |
| 149 | goto end; |
| 150 | if (n != DSA_D(me)->h->hashsz) |
| 151 | VALERR("bad message length (doesn't match hash size)"); |
| 152 | rc = getbool(!gdsa_verify(DSA_D(me), &s, p)); |
| 153 | end: |
| 154 | mp_drop(s.r); |
| 155 | mp_drop(s.s); |
| 156 | return (rc); |
| 157 | } |
| 158 | |
| 159 | static PyObject *dsapriv_pynew(PyTypeObject *ty, |
| 160 | PyObject *arg, PyObject *kw) |
| 161 | { |
| 162 | PyObject *G, *p, *u = Py_None, *rng = rand_pyobj, *hash = sha_pyobj; |
| 163 | PyObject *rc = 0; |
| 164 | char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 }; |
| 165 | |
| 166 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O|O!O!:new", kwlist, |
| 167 | group_pytype, &G, |
| 168 | ge_pytype, &p, |
| 169 | &u, |
| 170 | gchash_pytype, &hash, |
| 171 | grand_pytype, &rng) || |
| 172 | (rc = dsa_setup(dsapriv_pytype, G, u, p, rng, hash)) == 0) |
| 173 | goto end; |
| 174 | end: |
| 175 | return (rc); |
| 176 | } |
| 177 | |
| 178 | static PyMethodDef dsapub_pymethods[] = { |
| 179 | #define METHNAME(name) dsameth_##name |
| 180 | METH (beginhash, "D.beginhash() -> hash object") |
| 181 | METH (endhash, "D.endhash(H) -> BYTES") |
| 182 | METH (verify, "D.verify(MSG, (R, S)) -> true/false") |
| 183 | #undef METHNAME |
| 184 | { 0 } |
| 185 | }; |
| 186 | |
| 187 | static PyMethodDef dsapriv_pymethods[] = { |
| 188 | #define METHNAME(name) dsameth_##name |
| 189 | KWMETH(sign, "D.sign(MSG, k = K) -> R, S") |
| 190 | #undef METHNAME |
| 191 | { 0 } |
| 192 | }; |
| 193 | |
| 194 | static PyMemberDef dsapub_pymembers[] = { |
| 195 | #define MEMBERSTRUCT dsa_pyobj |
| 196 | MEMBER(G, T_OBJECT, READONLY, "D.G -> group to work in") |
| 197 | MEMBER(p, T_OBJECT, READONLY, "D.p -> public key (group element") |
| 198 | MEMBER(rng, T_OBJECT, READONLY, "D.rng -> random number generator") |
| 199 | MEMBER(hash, T_OBJECT, READONLY, "D.hash -> hash class") |
| 200 | #undef MEMBERSTRUCT |
| 201 | { 0 } |
| 202 | }; |
| 203 | |
| 204 | static PyMemberDef dsapriv_pymembers[] = { |
| 205 | #define MEMBERSTRUCT dsa_pyobj |
| 206 | MEMBER(u, T_OBJECT, READONLY, "D.u -> private key (exponent)") |
| 207 | #undef MEMBERSTRUCT |
| 208 | { 0 } |
| 209 | }; |
| 210 | |
| 211 | static PyTypeObject dsapub_pytype_skel = { |
| 212 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 213 | "DSAPub", /* @tp_name@ */ |
| 214 | sizeof(dsa_pyobj), /* @tp_basicsize@ */ |
| 215 | 0, /* @tp_itemsize@ */ |
| 216 | |
| 217 | dsa_pydealloc, /* @tp_dealloc@ */ |
| 218 | 0, /* @tp_print@ */ |
| 219 | 0, /* @tp_getattr@ */ |
| 220 | 0, /* @tp_setattr@ */ |
| 221 | 0, /* @tp_compare@ */ |
| 222 | 0, /* @tp_repr@ */ |
| 223 | 0, /* @tp_as_number@ */ |
| 224 | 0, /* @tp_as_sequence@ */ |
| 225 | 0, /* @tp_as_mapping@ */ |
| 226 | 0, /* @tp_hash@ */ |
| 227 | 0, /* @tp_call@ */ |
| 228 | 0, /* @tp_str@ */ |
| 229 | 0, /* @tp_getattro@ */ |
| 230 | 0, /* @tp_setattro@ */ |
| 231 | 0, /* @tp_as_buffer@ */ |
| 232 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 233 | Py_TPFLAGS_BASETYPE, |
| 234 | |
| 235 | /* @tp_doc@ */ |
| 236 | "DSA public key information.", |
| 237 | |
| 238 | 0, /* @tp_traverse@ */ |
| 239 | 0, /* @tp_clear@ */ |
| 240 | 0, /* @tp_richcompare@ */ |
| 241 | 0, /* @tp_weaklistoffset@ */ |
| 242 | 0, /* @tp_iter@ */ |
| 243 | 0, /* @tp_iternext@ */ |
| 244 | dsapub_pymethods, /* @tp_methods@ */ |
| 245 | dsapub_pymembers, /* @tp_members@ */ |
| 246 | 0, /* @tp_getset@ */ |
| 247 | 0, /* @tp_base@ */ |
| 248 | 0, /* @tp_dict@ */ |
| 249 | 0, /* @tp_descr_get@ */ |
| 250 | 0, /* @tp_descr_set@ */ |
| 251 | 0, /* @tp_dictoffset@ */ |
| 252 | 0, /* @tp_init@ */ |
| 253 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 254 | dsapub_pynew, /* @tp_new@ */ |
| 255 | 0, /* @tp_free@ */ |
| 256 | 0 /* @tp_is_gc@ */ |
| 257 | }; |
| 258 | |
| 259 | static PyTypeObject dsapriv_pytype_skel = { |
| 260 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 261 | "DSAPriv", /* @tp_name@ */ |
| 262 | sizeof(dsa_pyobj), /* @tp_basicsize@ */ |
| 263 | 0, /* @tp_itemsize@ */ |
| 264 | |
| 265 | 0, /* @tp_dealloc@ */ |
| 266 | 0, /* @tp_print@ */ |
| 267 | 0, /* @tp_getattr@ */ |
| 268 | 0, /* @tp_setattr@ */ |
| 269 | 0, /* @tp_compare@ */ |
| 270 | 0, /* @tp_repr@ */ |
| 271 | 0, /* @tp_as_number@ */ |
| 272 | 0, /* @tp_as_sequence@ */ |
| 273 | 0, /* @tp_as_mapping@ */ |
| 274 | 0, /* @tp_hash@ */ |
| 275 | 0, /* @tp_call@ */ |
| 276 | 0, /* @tp_str@ */ |
| 277 | 0, /* @tp_getattro@ */ |
| 278 | 0, /* @tp_setattro@ */ |
| 279 | 0, /* @tp_as_buffer@ */ |
| 280 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 281 | Py_TPFLAGS_BASETYPE, |
| 282 | |
| 283 | /* @tp_doc@ */ |
| 284 | "DSA private key information.", |
| 285 | |
| 286 | 0, /* @tp_traverse@ */ |
| 287 | 0, /* @tp_clear@ */ |
| 288 | 0, /* @tp_richcompare@ */ |
| 289 | 0, /* @tp_weaklistoffset@ */ |
| 290 | 0, /* @tp_iter@ */ |
| 291 | 0, /* @tp_iternext@ */ |
| 292 | dsapriv_pymethods, /* @tp_methods@ */ |
| 293 | dsapriv_pymembers, /* @tp_members@ */ |
| 294 | 0, /* @tp_getset@ */ |
| 295 | 0, /* @tp_base@ */ |
| 296 | 0, /* @tp_dict@ */ |
| 297 | 0, /* @tp_descr_get@ */ |
| 298 | 0, /* @tp_descr_set@ */ |
| 299 | 0, /* @tp_dictoffset@ */ |
| 300 | 0, /* @tp_init@ */ |
| 301 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 302 | dsapriv_pynew, /* @tp_new@ */ |
| 303 | 0, /* @tp_free@ */ |
| 304 | 0 /* @tp_is_gc@ */ |
| 305 | }; |
| 306 | |
| 307 | static PyObject *kcdsapub_pynew(PyTypeObject *ty, |
| 308 | PyObject *arg, PyObject *kw) |
| 309 | { |
| 310 | PyObject *G, *p, *u = 0, *rng = rand_pyobj, *hash = has160_pyobj; |
| 311 | PyObject *rc = 0; |
| 312 | char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 }; |
| 313 | |
| 314 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O|O!O!:new", kwlist, |
| 315 | group_pytype, &G, |
| 316 | ge_pytype, &p, |
| 317 | &u, |
| 318 | gchash_pytype, &hash, |
| 319 | grand_pytype, &rng) || |
| 320 | (rc = dsa_setup(kcdsapub_pytype, G, u, p, rng, hash)) == 0) |
| 321 | goto end; |
| 322 | end: |
| 323 | return (rc); |
| 324 | } |
| 325 | |
| 326 | static PyObject *kcdsapriv_pynew(PyTypeObject *ty, |
| 327 | PyObject *arg, PyObject *kw) |
| 328 | { |
| 329 | PyObject *G, *p, *u = Py_None, *rng = rand_pyobj, *hash = has160_pyobj; |
| 330 | PyObject *rc = 0; |
| 331 | char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 }; |
| 332 | |
| 333 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|OO!O!:new", kwlist, |
| 334 | group_pytype, &G, |
| 335 | ge_pytype, &p, |
| 336 | &u, |
| 337 | gchash_pytype, &hash, |
| 338 | grand_pytype, &rng) || |
| 339 | (rc = dsa_setup(kcdsapriv_pytype, G, u, p, rng, hash)) == 0) |
| 340 | goto end; |
| 341 | end: |
| 342 | return (rc); |
| 343 | } |
| 344 | |
| 345 | static PyObject *kcdsameth_beginhash(PyObject *me, PyObject *arg) |
| 346 | { |
| 347 | if (!PyArg_ParseTuple(arg, ":beginhash")) return (0); |
| 348 | return (ghash_pywrap(DSA_HASH(me), gkcdsa_beginhash(DSA_D(me)), f_freeme)); |
| 349 | } |
| 350 | |
| 351 | static PyObject *kcdsameth_endhash(PyObject *me, PyObject *arg) |
| 352 | { |
| 353 | ghash *h; |
| 354 | PyObject *rc; |
| 355 | if (!PyArg_ParseTuple(arg, "O&:endhash", convghash, &h)) return (0); |
| 356 | gkcdsa_endhash(DSA_D(me), h); |
| 357 | h = GH_COPY(h); |
| 358 | rc = bytestring_pywrap(0, GH_CLASS(h)->hashsz); |
| 359 | GH_DONE(h, PyString_AS_STRING(rc)); |
| 360 | GH_DESTROY(h); |
| 361 | return (rc); |
| 362 | } |
| 363 | |
| 364 | static PyObject *kcdsameth_sign(PyObject *me, PyObject *arg, PyObject *kw) |
| 365 | { |
| 366 | gkcdsa_sig s = GKCDSA_SIG_INIT; |
| 367 | char *p; |
| 368 | int n; |
| 369 | mp *k = 0; |
| 370 | PyObject *r = 0, *rc = 0; |
| 371 | char *kwlist[] = { "msg", "k", 0 }; |
| 372 | |
| 373 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#|O&:sign", kwlist, |
| 374 | &p, &n, convmp, &k)) |
| 375 | goto end; |
| 376 | if (n != DSA_D(me)->h->hashsz) |
| 377 | VALERR("bad message length (doesn't match hash size)"); |
| 378 | r = bytestring_pywrap(0, DSA_D(me)->h->hashsz); |
| 379 | s.r = (octet *)PyString_AS_STRING(r); |
| 380 | gkcdsa_sign(DSA_D(me), &s, p, k); |
| 381 | rc = Py_BuildValue("(ON)", r, mp_pywrap(s.s)); |
| 382 | end: |
| 383 | Py_XDECREF(r); |
| 384 | mp_drop(k); |
| 385 | return (rc); |
| 386 | } |
| 387 | |
| 388 | static PyObject *kcdsameth_verify(PyObject *me, PyObject *arg) |
| 389 | { |
| 390 | char *p; |
| 391 | int n, rn; |
| 392 | gkcdsa_sig s = GKCDSA_SIG_INIT; |
| 393 | PyObject *rc = 0; |
| 394 | |
| 395 | if (!PyArg_ParseTuple(arg, "s#(s#O&):verify", |
| 396 | &p, &n, &s.r, &rn, convmp, &s.s)) |
| 397 | goto end; |
| 398 | if (n != DSA_D(me)->h->hashsz) |
| 399 | VALERR("bad message length (doesn't match hash size)"); |
| 400 | if (rn != DSA_D(me)->h->hashsz) |
| 401 | VALERR("bad signature `r' length (doesn't match hash size)"); |
| 402 | rc = getbool(!gkcdsa_verify(DSA_D(me), &s, p)); |
| 403 | end: |
| 404 | mp_drop(s.s); |
| 405 | return (rc); |
| 406 | } |
| 407 | |
| 408 | static PyMethodDef kcdsapub_pymethods[] = { |
| 409 | #define METHNAME(name) kcdsameth_##name |
| 410 | METH (beginhash, "D.beginhash() -> hash object") |
| 411 | METH (endhash, "D.endhash(H) -> BYTES") |
| 412 | METH (verify, "D.verify(MSG, (R, S)) -> true/false") |
| 413 | #undef METHNAME |
| 414 | { 0 } |
| 415 | }; |
| 416 | |
| 417 | static PyMethodDef kcdsapriv_pymethods[] = { |
| 418 | #define METHNAME(name) kcdsameth_##name |
| 419 | KWMETH(sign, "D.sign(MSG, k = K) -> R, S") |
| 420 | #undef METHNAME |
| 421 | { 0 } |
| 422 | }; |
| 423 | |
| 424 | static PyTypeObject kcdsapub_pytype_skel = { |
| 425 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 426 | "KCDSAPub", /* @tp_name@ */ |
| 427 | sizeof(dsa_pyobj), /* @tp_basicsize@ */ |
| 428 | 0, /* @tp_itemsize@ */ |
| 429 | |
| 430 | dsa_pydealloc, /* @tp_dealloc@ */ |
| 431 | 0, /* @tp_print@ */ |
| 432 | 0, /* @tp_getattr@ */ |
| 433 | 0, /* @tp_setattr@ */ |
| 434 | 0, /* @tp_compare@ */ |
| 435 | 0, /* @tp_repr@ */ |
| 436 | 0, /* @tp_as_number@ */ |
| 437 | 0, /* @tp_as_sequence@ */ |
| 438 | 0, /* @tp_as_mapping@ */ |
| 439 | 0, /* @tp_hash@ */ |
| 440 | 0, /* @tp_call@ */ |
| 441 | 0, /* @tp_str@ */ |
| 442 | 0, /* @tp_getattro@ */ |
| 443 | 0, /* @tp_setattro@ */ |
| 444 | 0, /* @tp_as_buffer@ */ |
| 445 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 446 | Py_TPFLAGS_BASETYPE, |
| 447 | |
| 448 | /* @tp_doc@ */ |
| 449 | "KCDSA public key information.", |
| 450 | |
| 451 | 0, /* @tp_traverse@ */ |
| 452 | 0, /* @tp_clear@ */ |
| 453 | 0, /* @tp_richcompare@ */ |
| 454 | 0, /* @tp_weaklistoffset@ */ |
| 455 | 0, /* @tp_iter@ */ |
| 456 | 0, /* @tp_iternext@ */ |
| 457 | kcdsapub_pymethods, /* @tp_methods@ */ |
| 458 | dsapub_pymembers, /* @tp_members@ */ |
| 459 | 0, /* @tp_getset@ */ |
| 460 | 0, /* @tp_base@ */ |
| 461 | 0, /* @tp_dict@ */ |
| 462 | 0, /* @tp_descr_get@ */ |
| 463 | 0, /* @tp_descr_set@ */ |
| 464 | 0, /* @tp_dictoffset@ */ |
| 465 | 0, /* @tp_init@ */ |
| 466 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 467 | kcdsapub_pynew, /* @tp_new@ */ |
| 468 | 0, /* @tp_free@ */ |
| 469 | 0 /* @tp_is_gc@ */ |
| 470 | }; |
| 471 | |
| 472 | static PyTypeObject kcdsapriv_pytype_skel = { |
| 473 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 474 | "KCDSAPriv", /* @tp_name@ */ |
| 475 | sizeof(dsa_pyobj), /* @tp_basicsize@ */ |
| 476 | 0, /* @tp_itemsize@ */ |
| 477 | |
| 478 | 0, /* @tp_dealloc@ */ |
| 479 | 0, /* @tp_print@ */ |
| 480 | 0, /* @tp_getattr@ */ |
| 481 | 0, /* @tp_setattr@ */ |
| 482 | 0, /* @tp_compare@ */ |
| 483 | 0, /* @tp_repr@ */ |
| 484 | 0, /* @tp_as_number@ */ |
| 485 | 0, /* @tp_as_sequence@ */ |
| 486 | 0, /* @tp_as_mapping@ */ |
| 487 | 0, /* @tp_hash@ */ |
| 488 | 0, /* @tp_call@ */ |
| 489 | 0, /* @tp_str@ */ |
| 490 | 0, /* @tp_getattro@ */ |
| 491 | 0, /* @tp_setattro@ */ |
| 492 | 0, /* @tp_as_buffer@ */ |
| 493 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 494 | Py_TPFLAGS_BASETYPE, |
| 495 | |
| 496 | /* @tp_doc@ */ |
| 497 | "KCDSA private key information.", |
| 498 | |
| 499 | 0, /* @tp_traverse@ */ |
| 500 | 0, /* @tp_clear@ */ |
| 501 | 0, /* @tp_richcompare@ */ |
| 502 | 0, /* @tp_weaklistoffset@ */ |
| 503 | 0, /* @tp_iter@ */ |
| 504 | 0, /* @tp_iternext@ */ |
| 505 | kcdsapriv_pymethods, /* @tp_methods@ */ |
| 506 | dsapriv_pymembers, /* @tp_members@ */ |
| 507 | 0, /* @tp_getset@ */ |
| 508 | 0, /* @tp_base@ */ |
| 509 | 0, /* @tp_dict@ */ |
| 510 | 0, /* @tp_descr_get@ */ |
| 511 | 0, /* @tp_descr_set@ */ |
| 512 | 0, /* @tp_dictoffset@ */ |
| 513 | 0, /* @tp_init@ */ |
| 514 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 515 | kcdsapriv_pynew, /* @tp_new@ */ |
| 516 | 0, /* @tp_free@ */ |
| 517 | 0 /* @tp_is_gc@ */ |
| 518 | }; |
| 519 | |
| 520 | /*----- RSA ---------------------------------------------------------------*/ |
| 521 | |
| 522 | typedef struct rsapub_pyobj { |
| 523 | PyObject_HEAD |
| 524 | rsa_pub pub; |
| 525 | rsa_pubctx pubctx; |
| 526 | } rsapub_pyobj; |
| 527 | |
| 528 | #define RSA_PUB(o) (&((rsapub_pyobj *)(o))->pub) |
| 529 | #define RSA_PUBCTX(o) (&((rsapub_pyobj *)(o))->pubctx) |
| 530 | |
| 531 | typedef struct rsapriv_pyobj { |
| 532 | PyObject_HEAD |
| 533 | rsa_pub pub; |
| 534 | rsa_pubctx pubctx; |
| 535 | rsa_priv priv; |
| 536 | rsa_privctx privctx; |
| 537 | PyObject *rng; |
| 538 | } rsapriv_pyobj; |
| 539 | |
| 540 | #define RSA_PRIV(o) (&((rsapriv_pyobj *)(o))->priv) |
| 541 | #define RSA_PRIVCTX(o) (&((rsapriv_pyobj *)(o))->privctx) |
| 542 | #define RSA_RNG(o) (((rsapriv_pyobj *)(o))->rng) |
| 543 | |
| 544 | static PyTypeObject *rsapub_pytype, *rsapriv_pytype; |
| 545 | |
| 546 | static PyObject *rsapub_pynew(PyTypeObject *ty, |
| 547 | PyObject *arg, PyObject *kw) |
| 548 | { |
| 549 | rsa_pub rp = { 0 }; |
| 550 | rsapub_pyobj *o; |
| 551 | char *kwlist[] = { "n", "e", 0 }; |
| 552 | |
| 553 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:new", kwlist, |
| 554 | convmp, &rp.n, convmp, &rp.e)) |
| 555 | goto end; |
| 556 | if (!MP_ODDP(rp.n)) VALERR("RSA modulus must be even"); |
| 557 | o = (rsapub_pyobj *)ty->tp_alloc(ty, 0); |
| 558 | o->pub = rp; |
| 559 | rsa_pubcreate(&o->pubctx, &o->pub); |
| 560 | return ((PyObject *)o); |
| 561 | end: |
| 562 | rsa_pubfree(&rp); |
| 563 | return (0); |
| 564 | } |
| 565 | |
| 566 | static void rsapub_pydealloc(PyObject *me) |
| 567 | { |
| 568 | rsa_pubdestroy(RSA_PUBCTX(me)); |
| 569 | rsa_pubfree(RSA_PUB(me)); |
| 570 | FREEOBJ(me); |
| 571 | } |
| 572 | |
| 573 | static PyObject *rsaget_n(PyObject *me, void *hunoz) |
| 574 | { return mp_pywrap(MP_COPY(RSA_PUB(me)->n)); } |
| 575 | |
| 576 | static PyObject *rsaget_e(PyObject *me, void *hunoz) |
| 577 | { return mp_pywrap(MP_COPY(RSA_PUB(me)->e)); } |
| 578 | |
| 579 | static PyObject *rsameth_pubop(PyObject *me, PyObject *arg) |
| 580 | { |
| 581 | mp *x = 0; |
| 582 | PyObject *rc = 0; |
| 583 | |
| 584 | if (!PyArg_ParseTuple(arg, "O&:pubop", convmp, &x)) goto end; |
| 585 | rc = mp_pywrap(rsa_pubop(RSA_PUBCTX(me), MP_NEW, x)); |
| 586 | end: |
| 587 | mp_drop(x); |
| 588 | return (rc); |
| 589 | } |
| 590 | |
| 591 | static PyObject *rsapriv_dopywrap(PyTypeObject *ty, |
| 592 | rsa_priv *rp, PyObject *rng) |
| 593 | { |
| 594 | rsapriv_pyobj *o; |
| 595 | |
| 596 | o = (rsapriv_pyobj *)ty->tp_alloc(ty, 0); |
| 597 | o->priv = *rp; |
| 598 | o->pub.n = rp->n; |
| 599 | o->pub.e = rp->e; |
| 600 | rsa_privcreate(&o->privctx, &o->priv, &rand_global); |
| 601 | rsa_pubcreate(&o->pubctx, &o->pub); |
| 602 | if (!rng) { |
| 603 | rng = Py_None; |
| 604 | Py_INCREF(rng); |
| 605 | } |
| 606 | o->rng = rng; |
| 607 | return ((PyObject *)o); |
| 608 | } |
| 609 | |
| 610 | PyObject *rsapriv_pywrap(rsa_priv *rp) |
| 611 | { return rsapriv_dopywrap(rsapriv_pytype, rp, 0); } |
| 612 | |
| 613 | static PyObject *rsapriv_pynew(PyTypeObject *ty, |
| 614 | PyObject *arg, PyObject *kw) |
| 615 | { |
| 616 | rsa_priv rp = { 0 }; |
| 617 | PyObject *rng = Py_None; |
| 618 | char *kwlist[] = |
| 619 | { "n", "e", "d", "p", "q", "dp", "dq", "q_inv", "rng", 0 }; |
| 620 | |
| 621 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&O&O&O&O&O&O&O&O:new", kwlist, |
| 622 | convmp, &rp.n, convmp, &rp.e, |
| 623 | convmp, &rp.d, |
| 624 | convmp, &rp.p, convmp, &rp.q, |
| 625 | convmp, &rp.dp, convmp, &rp.dq, |
| 626 | convmp, &rp.q_inv, |
| 627 | &rng)) |
| 628 | goto end; |
| 629 | if ((rp.n && !MP_ODDP(rp.n)) || |
| 630 | (rp.p && !MP_ODDP(rp.p)) || |
| 631 | (rp.p && !MP_ODDP(rp.q))) |
| 632 | VALERR("RSA modulus and factors must be odd"); |
| 633 | if (rsa_recover(&rp)) VALERR("couldn't construct private key"); |
| 634 | if (rng != Py_None && !GRAND_PYCHECK(rng)) |
| 635 | TYERR("not a random number source"); |
| 636 | Py_INCREF(rng); |
| 637 | return (rsapriv_dopywrap(ty, &rp, rng)); |
| 638 | end: |
| 639 | rsa_privfree(&rp); |
| 640 | return (0); |
| 641 | } |
| 642 | |
| 643 | static void rsapriv_pydealloc(PyObject *me) |
| 644 | { |
| 645 | RSA_PRIVCTX(me)->r = &rand_global; |
| 646 | rsa_privdestroy(RSA_PRIVCTX(me)); |
| 647 | rsa_privfree(RSA_PRIV(me)); |
| 648 | Py_DECREF(RSA_RNG(me)); |
| 649 | FREEOBJ(me); |
| 650 | } |
| 651 | |
| 652 | static PyObject *rsaget_d(PyObject *me, void *hunoz) |
| 653 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->d)); } |
| 654 | |
| 655 | static PyObject *rsaget_p(PyObject *me, void *hunoz) |
| 656 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->p)); } |
| 657 | |
| 658 | static PyObject *rsaget_q(PyObject *me, void *hunoz) |
| 659 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q)); } |
| 660 | |
| 661 | static PyObject *rsaget_dp(PyObject *me, void *hunoz) |
| 662 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dp)); } |
| 663 | |
| 664 | static PyObject *rsaget_dq(PyObject *me, void *hunoz) |
| 665 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->dq)); } |
| 666 | |
| 667 | static PyObject *rsaget_q_inv(PyObject *me, void *hunoz) |
| 668 | { return mp_pywrap(MP_COPY(RSA_PRIV(me)->q_inv)); } |
| 669 | |
| 670 | static PyObject *rsaget_rng(PyObject *me, void *hunoz) |
| 671 | { RETURN_OBJ(RSA_RNG(me)); } |
| 672 | |
| 673 | static int rsaset_rng(PyObject *me, PyObject *val, void *hunoz) |
| 674 | { |
| 675 | int rc = -1; |
| 676 | if (!val) |
| 677 | val = Py_None; |
| 678 | else if (val != Py_None && !GRAND_PYCHECK(val)) |
| 679 | TYERR("expected grand or None"); |
| 680 | Py_DECREF(RSA_RNG(me)); |
| 681 | RSA_RNG(me) = val; |
| 682 | Py_INCREF(val); |
| 683 | rc = 0; |
| 684 | end: |
| 685 | return (rc); |
| 686 | } |
| 687 | |
| 688 | static PyObject *rsameth_privop(PyObject *me, PyObject *arg, PyObject *kw) |
| 689 | { |
| 690 | PyObject *rng = RSA_RNG(me); |
| 691 | mp *x = 0; |
| 692 | PyObject *rc = 0; |
| 693 | char *kwlist[] = { "x", "rng", 0 }; |
| 694 | |
| 695 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&|O:privop", kwlist, |
| 696 | convmp, &x, &rng)) |
| 697 | goto end; |
| 698 | if (rng != Py_None && !GRAND_PYCHECK(rng)) |
| 699 | TYERR("not a random number source"); |
| 700 | RSA_PRIVCTX(me)->r = (rng == Py_None) ? 0 : GRAND_R(rng); |
| 701 | rc = mp_pywrap(rsa_privop(RSA_PRIVCTX(me), MP_NEW, x)); |
| 702 | end: |
| 703 | mp_drop(x); |
| 704 | return (rc); |
| 705 | } |
| 706 | |
| 707 | static PyObject *meth__RSAPriv_generate(PyObject *me, |
| 708 | PyObject *arg, PyObject *kw) |
| 709 | { |
| 710 | grand *r = &rand_global; |
| 711 | unsigned nbits; |
| 712 | unsigned n = 0; |
| 713 | rsa_priv rp; |
| 714 | pgev evt = { 0 }; |
| 715 | char *kwlist[] = { "class", "nbits", "event", "rng", "nsteps", 0 }; |
| 716 | PyObject *rc = 0; |
| 717 | |
| 718 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&|O&O&O&:generate", kwlist, |
| 719 | &me, convuint, &nbits, convpgev, &evt, |
| 720 | convgrand, &r, convuint, &n)) |
| 721 | goto end; |
| 722 | if (rsa_gen(&rp, nbits, r, n, evt.proc, evt.ctx)) |
| 723 | PGENERR; |
| 724 | rc = rsapriv_pywrap(&rp); |
| 725 | end: |
| 726 | droppgev(&evt); |
| 727 | return (rc); |
| 728 | } |
| 729 | |
| 730 | static PyGetSetDef rsapub_pygetset[] = { |
| 731 | #define GETSETNAME(op, name) rsa##op##_##name |
| 732 | GET (n, "R.n -> N") |
| 733 | GET (e, "R.e -> E") |
| 734 | #undef GETSETNAME |
| 735 | { 0 } |
| 736 | }; |
| 737 | |
| 738 | static PyMethodDef rsapub_pymethods[] = { |
| 739 | #define METHNAME(name) rsameth_##name |
| 740 | METH (pubop, "R.pubop(X) -> X^E (mod N)") |
| 741 | #undef METHNAME |
| 742 | { 0 } |
| 743 | }; |
| 744 | |
| 745 | static PyGetSetDef rsapriv_pygetset[] = { |
| 746 | #define GETSETNAME(op, name) rsa##op##_##name |
| 747 | GET (d, "R.d -> D") |
| 748 | GET (p, "R.p -> P") |
| 749 | GET (q, "R.q -> Q") |
| 750 | GET (dp, "R.dp -> D mod (P - 1)") |
| 751 | GET (dq, "R.dq -> D mod (Q - 1)") |
| 752 | GET (q_inv, "R.q_inv -> Q^{-1} mod P") |
| 753 | GETSET(rng, "R.rng -> random number source for blinding") |
| 754 | #undef GETSETNAME |
| 755 | { 0 } |
| 756 | }; |
| 757 | |
| 758 | static PyMethodDef rsapriv_pymethods[] = { |
| 759 | #define METHNAME(name) rsameth_##name |
| 760 | KWMETH(privop, "R.privop(X, rng = None) -> X^D (mod N)") |
| 761 | #undef METHNAME |
| 762 | { 0 } |
| 763 | }; |
| 764 | |
| 765 | static PyTypeObject rsapub_pytype_skel = { |
| 766 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 767 | "RSAPub", /* @tp_name@ */ |
| 768 | sizeof(rsapub_pyobj), /* @tp_basicsize@ */ |
| 769 | 0, /* @tp_itemsize@ */ |
| 770 | |
| 771 | rsapub_pydealloc, /* @tp_dealloc@ */ |
| 772 | 0, /* @tp_print@ */ |
| 773 | 0, /* @tp_getattr@ */ |
| 774 | 0, /* @tp_setattr@ */ |
| 775 | 0, /* @tp_compare@ */ |
| 776 | 0, /* @tp_repr@ */ |
| 777 | 0, /* @tp_as_number@ */ |
| 778 | 0, /* @tp_as_sequence@ */ |
| 779 | 0, /* @tp_as_mapping@ */ |
| 780 | 0, /* @tp_hash@ */ |
| 781 | 0, /* @tp_call@ */ |
| 782 | 0, /* @tp_str@ */ |
| 783 | 0, /* @tp_getattro@ */ |
| 784 | 0, /* @tp_setattro@ */ |
| 785 | 0, /* @tp_as_buffer@ */ |
| 786 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 787 | Py_TPFLAGS_BASETYPE, |
| 788 | |
| 789 | /* @tp_doc@ */ |
| 790 | "RSA public key information.", |
| 791 | |
| 792 | 0, /* @tp_traverse@ */ |
| 793 | 0, /* @tp_clear@ */ |
| 794 | 0, /* @tp_richcompare@ */ |
| 795 | 0, /* @tp_weaklistoffset@ */ |
| 796 | 0, /* @tp_iter@ */ |
| 797 | 0, /* @tp_iternext@ */ |
| 798 | rsapub_pymethods, /* @tp_methods@ */ |
| 799 | 0, /* @tp_members@ */ |
| 800 | rsapub_pygetset, /* @tp_getset@ */ |
| 801 | 0, /* @tp_base@ */ |
| 802 | 0, /* @tp_dict@ */ |
| 803 | 0, /* @tp_descr_get@ */ |
| 804 | 0, /* @tp_descr_set@ */ |
| 805 | 0, /* @tp_dictoffset@ */ |
| 806 | 0, /* @tp_init@ */ |
| 807 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 808 | rsapub_pynew, /* @tp_new@ */ |
| 809 | 0, /* @tp_free@ */ |
| 810 | 0 /* @tp_is_gc@ */ |
| 811 | }; |
| 812 | |
| 813 | static PyTypeObject rsapriv_pytype_skel = { |
| 814 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 815 | "RSAPriv", /* @tp_name@ */ |
| 816 | sizeof(rsapriv_pyobj), /* @tp_basicsize@ */ |
| 817 | 0, /* @tp_itemsize@ */ |
| 818 | |
| 819 | rsapriv_pydealloc, /* @tp_dealloc@ */ |
| 820 | 0, /* @tp_print@ */ |
| 821 | 0, /* @tp_getattr@ */ |
| 822 | 0, /* @tp_setattr@ */ |
| 823 | 0, /* @tp_compare@ */ |
| 824 | 0, /* @tp_repr@ */ |
| 825 | 0, /* @tp_as_number@ */ |
| 826 | 0, /* @tp_as_sequence@ */ |
| 827 | 0, /* @tp_as_mapping@ */ |
| 828 | 0, /* @tp_hash@ */ |
| 829 | 0, /* @tp_call@ */ |
| 830 | 0, /* @tp_str@ */ |
| 831 | 0, /* @tp_getattro@ */ |
| 832 | 0, /* @tp_setattro@ */ |
| 833 | 0, /* @tp_as_buffer@ */ |
| 834 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 835 | Py_TPFLAGS_BASETYPE, |
| 836 | |
| 837 | /* @tp_doc@ */ |
| 838 | "RSA private key information.", |
| 839 | |
| 840 | 0, /* @tp_traverse@ */ |
| 841 | 0, /* @tp_clear@ */ |
| 842 | 0, /* @tp_richcompare@ */ |
| 843 | 0, /* @tp_weaklistoffset@ */ |
| 844 | 0, /* @tp_iter@ */ |
| 845 | 0, /* @tp_iternext@ */ |
| 846 | rsapriv_pymethods, /* @tp_methods@ */ |
| 847 | 0, /* @tp_members@ */ |
| 848 | rsapriv_pygetset, /* @tp_getset@ */ |
| 849 | 0, /* @tp_base@ */ |
| 850 | 0, /* @tp_dict@ */ |
| 851 | 0, /* @tp_descr_get@ */ |
| 852 | 0, /* @tp_descr_set@ */ |
| 853 | 0, /* @tp_dictoffset@ */ |
| 854 | 0, /* @tp_init@ */ |
| 855 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 856 | rsapriv_pynew, /* @tp_new@ */ |
| 857 | 0, /* @tp_free@ */ |
| 858 | 0 /* @tp_is_gc@ */ |
| 859 | }; |
| 860 | |
| 861 | /*----- RSA padding schemes -----------------------------------------------*/ |
| 862 | |
| 863 | static PyObject *meth__p1crypt_encode(PyObject *me, |
| 864 | PyObject *arg, PyObject *kw) |
| 865 | { |
| 866 | pkcs1 p1; |
| 867 | char *m, *ep; |
| 868 | int msz, epsz; |
| 869 | unsigned long nbits; |
| 870 | PyObject *rc = 0; |
| 871 | octet *b = 0; |
| 872 | size_t sz; |
| 873 | mp *x; |
| 874 | char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 }; |
| 875 | |
| 876 | p1.r = &rand_global; ep = 0; epsz = 0; |
| 877 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist, |
| 878 | &m, &msz, convulong, &nbits, |
| 879 | &ep, &epsz, convgrand, &p1.r)) |
| 880 | goto end; |
| 881 | sz = (nbits + 7)/8; |
| 882 | p1.ep = ep; p1.epsz = epsz; |
| 883 | if (epsz + msz + 11 > sz) VALERR("buffer underflow"); |
| 884 | b = xmalloc(sz); |
| 885 | x = pkcs1_cryptencode(MP_NEW, m, msz, b, sz, nbits, &p1); |
| 886 | rc = mp_pywrap(x); |
| 887 | end: |
| 888 | xfree(b); |
| 889 | return (rc); |
| 890 | } |
| 891 | |
| 892 | static PyObject *meth__p1crypt_decode(PyObject *me, |
| 893 | PyObject *arg, PyObject *kw) |
| 894 | { |
| 895 | pkcs1 p1; |
| 896 | char *ep; |
| 897 | int epsz; |
| 898 | unsigned long nbits; |
| 899 | int n; |
| 900 | PyObject *rc = 0; |
| 901 | octet *b = 0; |
| 902 | size_t sz; |
| 903 | mp *x = 0; |
| 904 | char *kwlist[] = { "ct", "nbits", "ep", "rng", 0 }; |
| 905 | |
| 906 | p1.r = &rand_global; ep = 0; epsz = 0; |
| 907 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|s#O&:decode", kwlist, |
| 908 | convmp, &x, convulong, &nbits, |
| 909 | &ep, &epsz, convgrand, &p1.r)) |
| 910 | goto end; |
| 911 | sz = (nbits + 7)/8; |
| 912 | p1.ep = ep; p1.epsz = epsz; |
| 913 | if (epsz + 11 > sz) VALERR("buffer underflow"); |
| 914 | b = xmalloc(sz); |
| 915 | if ((n = pkcs1_cryptdecode(x, b, sz, nbits, &p1)) < 0) |
| 916 | VALERR("decryption failed"); |
| 917 | rc = bytestring_pywrap(b, n); |
| 918 | end: |
| 919 | mp_drop(x); |
| 920 | xfree(b); |
| 921 | return (rc); |
| 922 | } |
| 923 | |
| 924 | static PyObject *meth__p1sig_encode(PyObject *me, |
| 925 | PyObject *arg, PyObject *kw) |
| 926 | { |
| 927 | pkcs1 p1; |
| 928 | char *m, *ep; |
| 929 | int msz, epsz; |
| 930 | unsigned long nbits; |
| 931 | PyObject *rc = 0; |
| 932 | octet *b = 0; |
| 933 | size_t sz; |
| 934 | mp *x; |
| 935 | char *kwlist[] = { "msg", "nbits", "ep", "rng", 0 }; |
| 936 | |
| 937 | p1.r = &rand_global; ep = 0; epsz = 0; |
| 938 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|s#O&:encode", kwlist, |
| 939 | &m, &msz, convulong, &nbits, |
| 940 | &ep, &epsz, convgrand, &p1.r)) |
| 941 | goto end; |
| 942 | sz = (nbits + 7)/8; |
| 943 | p1.ep = ep; p1.epsz = epsz; |
| 944 | if (epsz + msz + 11 > sz) VALERR("buffer underflow"); |
| 945 | b = xmalloc(sz); |
| 946 | x = pkcs1_sigencode(MP_NEW, m, msz, b, sz, nbits, &p1); |
| 947 | rc = mp_pywrap(x); |
| 948 | end: |
| 949 | xfree(b); |
| 950 | return (rc); |
| 951 | } |
| 952 | |
| 953 | static PyObject *meth__p1sig_decode(PyObject *me, |
| 954 | PyObject *arg, PyObject *kw) |
| 955 | { |
| 956 | pkcs1 p1; |
| 957 | char *ep; |
| 958 | int epsz; |
| 959 | unsigned long nbits; |
| 960 | int n; |
| 961 | PyObject *hukairz; |
| 962 | PyObject *rc = 0; |
| 963 | octet *b = 0; |
| 964 | size_t sz; |
| 965 | mp *x = 0; |
| 966 | char *kwlist[] = { "msg", "sig", "nbits", "ep", "rng", 0 }; |
| 967 | |
| 968 | p1.r = &rand_global; ep = 0; epsz = 0; |
| 969 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO&O&|s#O&:decode", kwlist, |
| 970 | &hukairz, convmp, &x, convulong, &nbits, |
| 971 | &ep, &epsz, convgrand, &p1.r)) |
| 972 | goto end; |
| 973 | sz = (nbits + 7)/8; |
| 974 | p1.ep = ep; p1.epsz = epsz; |
| 975 | if (epsz + 10 > sz) VALERR("buffer underflow"); |
| 976 | b = xmalloc(sz); |
| 977 | if ((n = pkcs1_sigdecode(x, 0, 0, b, sz, nbits, &p1)) < 0) |
| 978 | VALERR("verification failed"); |
| 979 | rc = bytestring_pywrap(b, n); |
| 980 | end: |
| 981 | mp_drop(x); |
| 982 | xfree(b); |
| 983 | return (rc); |
| 984 | } |
| 985 | |
| 986 | static PyObject *meth__oaep_encode(PyObject *me, |
| 987 | PyObject *arg, PyObject *kw) |
| 988 | { |
| 989 | oaep o; |
| 990 | char *m, *ep; |
| 991 | int msz, epsz; |
| 992 | unsigned long nbits; |
| 993 | PyObject *rc = 0; |
| 994 | octet *b = 0; |
| 995 | size_t sz; |
| 996 | mp *x; |
| 997 | char *kwlist[] = { "msg", "nbits", "mgf", "hash", "ep", "rng", 0 }; |
| 998 | |
| 999 | o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0; |
| 1000 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&s#O&:encode", kwlist, |
| 1001 | &m, &msz, convulong, &nbits, |
| 1002 | convgccipher, &o.cc, |
| 1003 | convgchash, &o.ch, |
| 1004 | &ep, &epsz, |
| 1005 | convgrand, &o.r)) |
| 1006 | goto end; |
| 1007 | sz = (nbits + 7)/8; |
| 1008 | o.ep = ep; o.epsz = epsz; |
| 1009 | if (2 * o.ch->hashsz + 2 + msz > sz) VALERR("buffer underflow"); |
| 1010 | b = xmalloc(sz); |
| 1011 | x = oaep_encode(MP_NEW, m, msz, b, sz, nbits, &o); |
| 1012 | rc = mp_pywrap(x); |
| 1013 | end: |
| 1014 | xfree(b); |
| 1015 | return (rc); |
| 1016 | } |
| 1017 | |
| 1018 | static PyObject *meth__oaep_decode(PyObject *me, |
| 1019 | PyObject *arg, PyObject *kw) |
| 1020 | { |
| 1021 | oaep o; |
| 1022 | char *ep; |
| 1023 | int epsz; |
| 1024 | unsigned long nbits; |
| 1025 | int n; |
| 1026 | PyObject *rc = 0; |
| 1027 | octet *b = 0; |
| 1028 | size_t sz; |
| 1029 | mp *x = 0; |
| 1030 | char *kwlist[] = { "ct", "nbits", "mgf", "hash", "ep", "rng", 0 }; |
| 1031 | |
| 1032 | o.r = &rand_global; o.cc = &sha_mgf; o.ch = &sha; ep = 0; epsz = 0; |
| 1033 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&|O&O&s#O&:decode", kwlist, |
| 1034 | convmp, &x, convulong, &nbits, |
| 1035 | convgccipher, &o.cc, |
| 1036 | convgchash, &o.ch, |
| 1037 | &ep, &epsz, |
| 1038 | convgrand, &o.r)) |
| 1039 | goto end; |
| 1040 | sz = (nbits + 7)/8; |
| 1041 | o.ep = ep; o.epsz = epsz; |
| 1042 | if (2 * o.ch->hashsz > sz) VALERR("buffer underflow"); |
| 1043 | b = xmalloc(sz); |
| 1044 | if ((n = oaep_decode(x, b, sz, nbits, &o)) < 0) |
| 1045 | VALERR("decryption failed"); |
| 1046 | rc = bytestring_pywrap(b, n); |
| 1047 | end: |
| 1048 | mp_drop(x); |
| 1049 | xfree(b); |
| 1050 | return (rc); |
| 1051 | } |
| 1052 | |
| 1053 | static PyObject *meth__pss_encode(PyObject *me, |
| 1054 | PyObject *arg, PyObject *kw) |
| 1055 | { |
| 1056 | pss p; |
| 1057 | char *m; |
| 1058 | int msz; |
| 1059 | unsigned long nbits; |
| 1060 | PyObject *rc = 0; |
| 1061 | octet *b = 0; |
| 1062 | size_t sz; |
| 1063 | mp *x = 0; |
| 1064 | char *kwlist[] = { "msg", "nbits", "mgf", "hash", "saltsz", "rng", 0 }; |
| 1065 | |
| 1066 | p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1; |
| 1067 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&|O&O&O&O&:encode", kwlist, |
| 1068 | &m, &msz, convulong, &nbits, |
| 1069 | convgccipher, &p.cc, |
| 1070 | convgchash, &p.ch, |
| 1071 | convszt, &p.ssz, |
| 1072 | convgrand, &p.r)) |
| 1073 | goto end; |
| 1074 | sz = (nbits + 7)/8; |
| 1075 | if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz; |
| 1076 | if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow"); |
| 1077 | b = xmalloc(sz); |
| 1078 | x = pss_encode(MP_NEW, m, msz, b, sz, nbits, &p); |
| 1079 | rc = mp_pywrap(x); |
| 1080 | end: |
| 1081 | xfree(b); |
| 1082 | return (rc); |
| 1083 | } |
| 1084 | |
| 1085 | static PyObject *meth__pss_decode(PyObject *me, |
| 1086 | PyObject *arg, PyObject *kw) |
| 1087 | { |
| 1088 | pss p; |
| 1089 | char *m; |
| 1090 | int msz; |
| 1091 | unsigned long nbits; |
| 1092 | PyObject *rc = 0; |
| 1093 | octet *b = 0; |
| 1094 | size_t sz; |
| 1095 | int n; |
| 1096 | mp *x = 0; |
| 1097 | char *kwlist[] = |
| 1098 | { "msg", "sig", "nbits", "mgf", "hash", "saltsz", "rng", 0 }; |
| 1099 | |
| 1100 | p.cc = &sha_mgf; p.ch = &sha; p.r = &rand_global; p.ssz = (size_t)-1; |
| 1101 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#O&O&|O&O&O&O&:decode", kwlist, |
| 1102 | &m, &msz, convmp, &x, convulong, &nbits, |
| 1103 | convgccipher, &p.cc, |
| 1104 | convgchash, &p.ch, |
| 1105 | convszt, &p.ssz, |
| 1106 | convgrand, &p.r)) |
| 1107 | goto end; |
| 1108 | sz = (nbits + 7)/8; |
| 1109 | if (p.ssz == (size_t)-1) p.ssz = p.ch->hashsz; |
| 1110 | if (p.ch->hashsz + p.ssz + 2 > sz) VALERR("buffer underflow"); |
| 1111 | b = xmalloc(sz); |
| 1112 | if ((n = pss_decode(x, m, msz, b, sz, nbits, &p)) < 0) |
| 1113 | VALERR("verification failed"); |
| 1114 | rc = Py_None; Py_INCREF(rc); |
| 1115 | end: |
| 1116 | mp_drop(x); |
| 1117 | xfree(b); |
| 1118 | return (rc); |
| 1119 | } |
| 1120 | |
| 1121 | /*----- Global stuff ------------------------------------------------------*/ |
| 1122 | |
| 1123 | static PyMethodDef methods[] = { |
| 1124 | #define METHNAME(name) meth_##name |
| 1125 | KWMETH(_p1crypt_encode, 0) |
| 1126 | KWMETH(_p1crypt_decode, 0) |
| 1127 | KWMETH(_p1sig_encode, 0) |
| 1128 | KWMETH(_p1sig_decode, 0) |
| 1129 | KWMETH(_oaep_encode, 0) |
| 1130 | KWMETH(_oaep_decode, 0) |
| 1131 | KWMETH(_pss_encode, 0) |
| 1132 | KWMETH(_pss_decode, 0) |
| 1133 | KWMETH(_RSAPriv_generate, "\ |
| 1134 | generate(NBITS, [event = pgen_nullev, rng = rand, nsteps = 0]) -> R") |
| 1135 | #undef METHNAME |
| 1136 | { 0 } |
| 1137 | }; |
| 1138 | |
| 1139 | void pubkey_pyinit(void) |
| 1140 | { |
| 1141 | INITTYPE(dsapub, root); |
| 1142 | INITTYPE(dsapriv, dsapub); |
| 1143 | INITTYPE(kcdsapub, root); |
| 1144 | INITTYPE(kcdsapriv, kcdsapub); |
| 1145 | INITTYPE(rsapub, root); |
| 1146 | INITTYPE(rsapriv, rsapub); |
| 1147 | addmethods(methods); |
| 1148 | } |
| 1149 | |
| 1150 | void pubkey_pyinsert(PyObject *mod) |
| 1151 | { |
| 1152 | INSERT("DSAPub", dsapub_pytype); |
| 1153 | INSERT("DSAPriv", dsapriv_pytype); |
| 1154 | INSERT("KCDSAPub", kcdsapub_pytype); |
| 1155 | INSERT("KCDSAPriv", kcdsapriv_pytype); |
| 1156 | INSERT("RSAPub", rsapub_pytype); |
| 1157 | INSERT("RSAPriv", rsapriv_pytype); |
| 1158 | } |
| 1159 | |
| 1160 | /*----- That's all, folks -------------------------------------------------*/ |