ecc_point_get: Allow NULL x or y.

2dfae9f3 · Niels Möller · c8c37f89 · 2dfae9f3 · 2dfae9f3
Commit 2dfae9f3 authored Apr 04, 2013 by Niels Möller
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ChangeLog ChangeLog +3 -0

ecc-point.c ecc-point.c +4 -2

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--- a/ChangeLog
+++ b/ChangeLog
 2013-04-04  Niels Möller  <nisse@lysator.liu.se>

+	* ecc-point.c (ecc_point_get): Allow NULL x or y, ignore
+	corresponding coordinate.
+
 	* nettle.texinfo (Elliptic curves): Document high-level ECDSA
 	support.


--- a/ecc-point.c
+++ b/ecc-point.c
@@ -84,6 +84,8 @@ void
 ecc_point_get (const struct ecc_point *p, mpz_t x, mpz_t y)
 {
  mp_size_t size = p->ecc->size;
-  mpz_set_n (x, p->p, size);
-  mpz_set_n (y, p->p + size, size);
+  if (x)
+    mpz_set_n (x, p->p, size);
+  if (y)
+    mpz_set_n (y, p->p + size, size);
 }