Provide method specific functions for EC POINT infinity.

Provide method specific functions for EC_POINT_set_to_infinity() and
EC_POINT_is_at_infinity(). These are not always the same thing and
will depend on the coordinate system in use.

ok beck@ tb@

1 files changed, 3 insertions, 8 deletions

diff --git a/src/lib/libcrypto/ec/ec_lib.c b/src/lib/libcrypto/ec/ec_lib.c
index d760ecfb95..7cc7efe73f 100644
--- a/src/lib/libcrypto/ec/ec_lib.c
+++ b/src/lib/libcrypto/ec/ec_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_lib.c,v 1.124 2025/05/10 05:54:38 tb Exp $ */
+/* $OpenBSD: ec_lib.c,v 1.125 2025/05/24 08:25:58 jsing Exp $ */
 /*
  * Originally written by Bodo Moeller for the OpenSSL project.
  */
@@ -894,11 +894,7 @@ EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point)
                 ECerror(EC_R_INCOMPATIBLE_OBJECTS);
                 return 0;
         }
-
-        BN_zero(point->Z);
-        point->Z_is_one = 0;
-
-        return 1;
+        return point->meth->point_set_to_infinity(group, point);
 }
 LCRYPTO_ALIAS(EC_POINT_set_to_infinity);
 
@@ -1200,8 +1196,7 @@ EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
                 ECerror(EC_R_INCOMPATIBLE_OBJECTS);
                 return 0;
         }
-
-        return BN_is_zero(point->Z);
+        return point->meth->point_is_at_infinity(group, point);
 }
 LCRYPTO_ALIAS(EC_POINT_is_at_infinity);