Make binary curve ASN.1 work in FIPS mode.

Don't check for binary curves by checking methods: the values will
be different in FIPS mode as they are redirected to the validated module
version.

crypto/ec/ec_ameth.c

@@ -88,7 +88,7 @@ static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key)
 		if (!pstr)
 			return 0;
 		pstr->length = i2d_ECParameters(ec_key, &pstr->data);
-		if (pstr->length < 0)
+		if (pstr->length <= 0)
 			{
 			ASN1_STRING_free(pstr);
 			ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);

crypto/ec/ec_asn1.c

@@ -89,7 +89,8 @@ int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
 	if (group == NULL)
 		return 0;
 
-	if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
+	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
+	    NID_X9_62_characteristic_two_field
 	    || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0)))
 		{
 		ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
@@ -107,7 +108,8 @@ int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
 	if (group == NULL)
 		return 0;
 
-	if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
+	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
+	    NID_X9_62_characteristic_two_field
 	    || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0)))
 		{
 		ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);