Simplify EC_GROUP_get_basis_type()

The remaining EC_METHODs in libcrypto all have a field type of
NID_X9_62_prime_field, so this function always returns 0. Make
that more obvious.

ok jsing

diff --git a/lib/libcrypto/ec/ec_asn1.c b/lib/libcrypto/ec/ec_asn1.c
index 36a413a..6aedab9 100644 (file)
--- a/lib/libcrypto/ec/ec_asn1.c
+++ b/lib/libcrypto/ec/ec_asn1.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_asn1.c,v 1.45 2023/05/04 05:59:38 tb Exp $ */
+/* $OpenBSD: ec_asn1.c,v 1.46 2023/06/27 07:28:57 tb Exp $ */
 /*
  * Written by Nils Larsch for the OpenSSL project.
  */
@@ -70,23 +70,7 @@
 int
 EC_GROUP_get_basis_type(const EC_GROUP *group)
 {
-       int i = 0;
-
-       if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
-           NID_X9_62_characteristic_two_field)
-               /* everything else is currently not supported */
-               return 0;
-
-       while (group->poly[i] != 0)
-               i++;
-
-       if (i == 4)
-               return NID_X9_62_ppBasis;
-       else if (i == 2)
-               return NID_X9_62_tpBasis;
-       else
-               /* everything else is currently not supported */
-               return 0;
+       return 0;
 }
 
 /* some structures needed for the asn1 encoding */