EC: Reverse the default asn1_flag in a new EC_GROUP
The default was OPENSSL_EC_NAMED_CURVE, but that's not true until a
curve name has been set, so we change the initial value to
OPENSSL_EC_EXPLICIT_CURVE and let EC_GROUP_set_curve_name() change it
to OPENSSL_EC_NAMED_CURVE.
Submitted by Matt Caswell
@@ -63,7 +63,7 @@ EC_GROUP *ec_group_new_ex(OSSL_LIB_CTX *libctx, const char *propq,
if (ret->cofactor == NULL)
goto err;
}
- ret->asn1_flag = OPENSSL_EC_NAMED_CURVE;
+ ret->asn1_flag = OPENSSL_EC_EXPLICIT_CURVE;
ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
if (!meth->group_init(ret))
goto err;
@@ -481,6 +481,10 @@ const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group)
void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
{
group->curve_name = nid;
+ group->asn1_flag =
+ (nid != NID_undef)
+ ? OPENSSL_EC_NAMED_CURVE
+ : OPENSSL_EC_EXPLICIT_CURVE;
}
int EC_GROUP_get_curve_name(const EC_GROUP *group)
