X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb-python/blobdiff_plain/dc0757504af5097a4bb323d64e429a99f86d1076..1c6b925f0cf913ce3100c2ae3bcaed26a3f34bc1:/ec.c

diff --git a/ec.c b/ec.c
index d27036e..7fd369d 100644
--- a/ec.c
+++ b/ec.c
@@ -188,6 +188,7 @@ static PyObject *ecpt_pymul(PyObject *x, PyObject *y)
   if (ECPT_PYCHECK(x)) { PyObject *t; t = x; x = y; y = t; }
   if (!ECPT_PYCHECK(y) || (xx = tomp(x)) == 0) RETURN_NOTIMPL;
   ec_imul(ECPT_C(y), &zz, ECPT_P(y), xx);
+  MP_DROP(xx);
   return (ecpt_pywrap(ECPT_COBJ(y), &zz));
 }
 
@@ -204,8 +205,8 @@ static long ecpt_pyhash(PyObject *me)
   EC_OUT(ECPT_C(me), &p, ECPT_P(me));
   ec_putraw(ECPT_C(me), &b, &p);
   EC_DESTROY(&p);
-  xfree(q);
   h = unihash_hash(&unihash_global, h, BBASE(&b), BLEN(&b));
+  xfree(q);
   return (h % LONG_MAX);
 }
 
@@ -290,6 +291,34 @@ static PyObject *epmeth_toraw(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:ec2osp", 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)); }
 
@@ -391,9 +420,9 @@ static int ecptxl_3(ec_curve *c, ec *p,
 
   if (!x || !y || !z) TYERR("missing argument");
   if (!c) VALERR("internal form with no curve!");
-  if ((p->x == coord_in(c->f, x)) == 0 ||
-      (p->y == coord_in(c->f, y)) == 0 ||
-      (z != Py_None && (p->z = coord_in(c->f, z))) == 0)
+  if ((p->x = coord_in(c->f, x)) == 0 ||
+      (p->y = coord_in(c->f, y)) == 0 ||
+      (z != Py_None && (p->z = coord_in(c->f, z)) == 0))
     goto end;
   if (!p->z) p->z = MP_COPY(c->f->one); /* just in case */
   rc = 0;
@@ -436,7 +465,7 @@ static int ecptxl_1(ec_curve *c, ec *p, PyObject *x)
     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);
@@ -497,8 +526,8 @@ static PyObject *ecpt_pyint(PyObject *me)
   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);
@@ -656,6 +685,7 @@ static PyGetSetDef ecpt_pygetset[] = {
 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
@@ -758,10 +788,14 @@ static PyTypeObject ecptcurve_pytype_skel = {
 
 static PyObject *eccurve_pyrichcompare(PyObject *x, PyObject *y, int op)
 {
-  int b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
+  int b;
+
+  assert(ECCURVE_PYCHECK(x));
+  if (!ECCURVE_PYCHECK(y)) RETURN_NOTIMPL;
+  b = ec_samep(ECCURVE_C(x), ECCURVE_C(y));
   switch (op) {
     case Py_EQ: break;
-    case Py_NE: b = !b;
+    case Py_NE: b = !b; break;
     default: TYERR("can't order elliptic curves");
   }
   return (getbool(b));
@@ -806,7 +840,7 @@ static PyObject *ecmeth_mmul(PyObject *me, PyObject *arg)
 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;
@@ -817,7 +851,31 @@ static PyObject *meth__ECPtCurve_fromraw(PyObject *me, PyObject *arg)
   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[] = { "class", "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:
@@ -828,7 +886,7 @@ static PyObject *meth__ECPt_frombuf(PyObject *me, PyObject *arg)
 {
   buf b;
   char *p;
-  int sz;
+  Py_ssize_t sz;
   PyObject *rc = 0;
   ec pp = EC_INIT;
 
@@ -851,7 +909,7 @@ static PyObject *meth__ECPt_parse(PyObject *me, PyObject *arg)
   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);
@@ -975,7 +1033,7 @@ static PyObject *meth__ECCurve_parse(PyObject *me, PyObject *arg)
   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);
@@ -1355,7 +1413,7 @@ static PyObject *meth__ECInfo_parse(PyObject *me, PyObject *arg)
   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);
@@ -1492,6 +1550,7 @@ static PyMethodDef methods[] = {
 #define METHNAME(func) meth_##func
   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)")