/* -*-c-*-
- *
- * $Id$
*
* Elliptic curves
*
* (c) 2004 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of the Python interface to Catacomb.
*
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* Catacomb/Python is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with Catacomb/Python; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
static long ecpt_pyhash(PyObject *me)
{
- long i;
+ uint32 h;
+ buf b;
ec p = EC_INIT;
+ size_t sz = 2*ECPT_C(me)->f->noctets + 1;
+ octet *q = xmalloc(sz);
+ h = 0xe0fdd039 + ECPT_C(me)->f->ops->ty;
+ buf_init(&b, q, sz);
EC_OUT(ECPT_C(me), &p, ECPT_P(me));
- i = 0xe0fdd039; /* random perturbance */
- if (p.x) i ^= mp_tolong(p.x);
- if (p.y) i ^= mp_tolong(p.y);
- if (i == -1) i = -2;
+ ec_putraw(ECPT_C(me), &b, &p);
EC_DESTROY(&p);
- return (i);
+ h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
+ xfree(q);
+ return (h % LONG_MAX);
}
static PyObject *ecpt_pyrichcompare(PyObject *x, PyObject *y, int op)
static PyObject *epmeth_oncurvep(PyObject *me, PyObject *arg)
{
if (!PyArg_ParseTuple(arg, ":oncurvep")) return (0);
- return (getbool(!ec_check(ECPT_C(me), ECPT_P(me))));
+ return (getbool(EC_ATINF(ECPT_P(me)) ||
+ !EC_CHECK(ECPT_C(me), ECPT_P(me))));
}
static PyObject *epmeth_dbl(PyObject *me, PyObject *arg)
return (rc);
}
+static PyObject *epmeth_ec2osp(PyObject *me, PyObject *arg, PyObject *kw)
+{
+ buf b;
+ PyObject *rc;
+ char *p;
+ ec_curve *c = ECPT_C(me);
+ ec pp = EC_INIT;
+ int f = EC_EXPLY;
+ int len;
+ char *kwlist[] = { "flags", 0 };
+
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "|i:ectosp", kwlist, &f))
+ return (0);
+ len = c->f->noctets * 2 + 1;
+ rc = bytestring_pywrap(0, len);
+ p = PyString_AS_STRING(rc);
+ buf_init(&b, p, len);
+ EC_OUT(c, &pp, ECPT_P(me));
+ if (ec_ec2osp(c, f, &b, &pp)) {
+ Py_DECREF(rc); rc = 0;
+ VALERR("invalid flags");
+ }
+ EC_DESTROY(&pp);
+ _PyString_Resize(&rc, BLEN(&b));
+end:
+ return (rc);
+}
+
static PyObject *epget_curve(PyObject *me, void *hunoz)
{ RETURN_OBJ(ECPT_COBJ(me)); }
qd.p = q;
qd.e = 0;
if (!ec_ptparse(&qd, p))
- SYNERR(qd.e);
+ VALERR(qd.e);
goto fix;
} else if (c && (xx = tomp(x)) != 0) {
xx = F_IN(c->f, xx, xx);
PyObject *rc = 0;
if (EC_ATINF(ECPT_P(me))) VALERR("point at infinity");
getecptout(&p, me);
- if (mp_tolong_checked(p.x, &l)) goto end;
- rc = PyInt_FromLong(l);
+ if (!mp_tolong_checked(p.x, &l, 0)) rc = PyInt_FromLong(l);
+ else rc = mp_topylong(p.x);
end:
EC_DESTROY(&p);
return (rc);
static PyTypeObject ecpt_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECPt", /* @tp_name@ */
+ "ECPt", /* @tp_name@ */
sizeof(ecpt_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyMethodDef ecpt_pymethods[] = {
#define METHNAME(func) epmeth_##func
METH (toraw, "X.toraw() -> BIN")
+ KWMETH(ec2osp, "X.ec2osp([flags = EC_EXPLY]) -> BIN")
METH (dbl, "X.dbl() -> X + X")
METH (oncurvep, "X.oncurvep() -> BOOL")
#undef METHNAME
static PyTypeObject ecptcurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECPtCurve", /* @tp_name@ */
+ "ECPtCurve", /* @tp_name@ */
sizeof(ecpt_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
{
ec_mulfactor *f = pp;
+ EC_CREATE(&f->base);
if (getecpt(ECCURVE_C(me), &f->base, x) ||
(f->exp = getmp(m)) == 0)
return (-1);
- f->base = *ECPT_P(x);
return (0);
}
static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
{
char *p;
- int len;
+ Py_ssize_t len;
buf b;
PyObject *rc = 0;
ec_curve *cc;
buf_init(&b, p, len);
cc = ECCURVE_C(me);
if (ec_getraw(cc, &b, &pp))
- SYNERR("bad point");
+ VALERR("bad point");
+ EC_IN(cc, &pp, &pp);
+ rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
+end:
+ return (rc);
+}
+
+static PyObject *meth__ECPtCurve_os2ecp(PyObject *me,
+ PyObject *arg, PyObject *kw)
+{
+ char *p;
+ Py_ssize_t len;
+ buf b;
+ PyObject *rc = 0;
+ ec_curve *cc;
+ int f = EC_XONLY | EC_LSB | EC_SORT | EC_EXPLY;
+ ec pp = EC_INIT;
+ char *kwlist[] = { "buf", "flags", 0 };
+
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "Os#|f:os2ecp", kwlist,
+ &me, &p, &len, &f))
+ return (0);
+ buf_init(&b, p, len);
+ cc = ECCURVE_C(me);
+ if (ec_os2ecp(cc, f, &b, &pp)) VALERR("bad point");
EC_IN(cc, &pp, &pp);
rc = Py_BuildValue("(NN)", ecpt_pywrap(me, &pp), bytestring_pywrapbuf(&b));
end:
{
buf b;
char *p;
- int sz;
+ Py_ssize_t sz;
PyObject *rc = 0;
ec pp = EC_INIT;
if (!PyArg_ParseTuple(arg, "Os:parse", &me, &p)) goto end;
qd.p = p;
qd.e = 0;
- if (!ec_ptparse(&qd, &pp)) SYNERR(qd.e);
+ if (!ec_ptparse(&qd, &pp)) VALERR(qd.e);
rc = Py_BuildValue("(Ns)", ecpt_pywrapout(me, &pp), qd.p);
end:
return (rc);
cobj->ty.ht_type.tp_alloc = PyType_GenericAlloc;
cobj->ty.ht_type.tp_free = 0;
cobj->ty.ht_type.tp_new = ecpt_pynew;
- PyType_Ready(&cobj->ty.ht_type);
+ typeready(&cobj->ty.ht_type);
return ((PyObject *)cobj);
}
qd.p = p;
qd.e = 0;
if ((c = ec_curveparse(&qd)) == 0)
- SYNERR(qd.e);
+ VALERR(qd.e);
rc = eccurve_pywrap(0, c);
end:
return (rc);
static PyObject *ecget_a(PyObject *me, void *hunoz)
{ return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->a))); }
-static PyObject *ecget_b(PyObject *me, void *hunoz)
+static PyObject *ecget_b(PyObject *me, void *hunoz)
{ return (fe_pywrap(ECCURVE_FOBJ(me), MP_COPY(ECCURVE_C(me)->b))); }
static PyObject *ecget_field(PyObject *me, void *hunoz)
GET (inf, "E.inf -> point at infinity of this curve")
#undef GETSETNAME
{ 0 }
-};
+};
static PyMethodDef eccurve_pymethods[] = {
#define METHNAME(name) ecmeth_##name
static PyTypeObject eccurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECCurve", /* @tp_name@ */
+ "ECCurve", /* @tp_name@ */
sizeof(eccurve_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject ecprimecurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECPrimeCurve", /* @tp_name@ */
+ "ECPrimeCurve", /* @tp_name@ */
sizeof(eccurve_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject ecprimeprojcurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECPrimeProjCurve", /* @tp_name@ */
+ "ECPrimeProjCurve", /* @tp_name@ */
sizeof(eccurve_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject ecbincurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECBinCurve", /* @tp_name@ */
+ "ECBinCurve", /* @tp_name@ */
sizeof(eccurve_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject ecbinprojcurve_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECBinProjCurve", /* @tp_name@ */
+ "ECBinProjCurve", /* @tp_name@ */
sizeof(eccurve_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
TYERR("point not from this curve");
ei.c = ECCURVE_C(e);
EC_CREATE(&ei.g);
- EC_COPY(&ei.g, ECPT_P(g));
+ EC_OUT(ei.c, &ei.g, ECPT_P(g));
rc = (ecinfo_pyobj *)ty->tp_alloc(ty, 0);
rc->ei = ei;
rc->cobj = e;
qd.p = p;
qd.e = 0;
if (ec_infoparse(&qd, &ei))
- SYNERR(qd.e);
+ VALERR(qd.e);
rc = Py_BuildValue("(Ns)", ecinfo_pywrap(&ei), qd.p);
end:
return (rc);
static PyTypeObject ecinfo_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.ECInfo", /* @tp_name@ */
+ "ECInfo", /* @tp_name@ */
sizeof(ecinfo_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyMethodDef methods[] = {
#define METHNAME(func) meth_##func
- METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
- METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
- METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
- METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
- METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
- METH (_ECInfo__curven, "_curven(N) -> I")
+ METH (_ECPt_frombuf, "frombuf(E, STR) -> (P, REST)")
+ METH (_ECPtCurve_fromraw, "fromraw(E, STR) -> (P, REST)")
+ KWMETH(_ECPtCurve_os2ecp, "os2ecp(E, STR, [flags = ...]) -> (P, REST)")
+ METH (_ECPt_parse, "parse(E, STR) -> (P, REST)")
+ METH (_ECCurve_parse, "parse(STR) -> (E, REST)")
+ METH (_ECInfo_parse, "parse(STR) -> (I, REST)")
+ METH (_ECInfo__curven, "_curven(N) -> I")
#undef METHNAME
{ 0 }
};
}
c = PyInt_FromLong(i);
found:
- PyDict_SetItemString(d, (/*unconst*/ char *)ectab[i].name, c);
+ PyDict_SetItemString(d, (/*unconst*/ char *)p, c);
Py_DECREF(c);
}
ncurves = i;
~mdw / catacomb-python / blobdiff