On 09/01/15 00:05, Christian Weber wrote: > Thanks Matt, i just assumed the BIGNUMs were the coordinates without any projection - obviously that assumption was wrong - mislead by the funtions name. > What interests me is to how you accessed the BIGNUMs in the first place! The EC_POINT structure is opaque and is defined in an internal header file!! Applications shouldn't be reaching into those. Matt