Am 09.01.2015 um 01:11 schrieb Matt Caswell: 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 Actually i imported the internal header so the structure was known. I marked the import as HACK to access exactly that EC_POINT structure. The hack was carried out because of the lack of knowledge about how to access the public key. I yust did not understand the intention for hiding the EC_POINT structure and didn't find information about how to access the coordinate values which i need to compare with coordinates from other sources (XML Dsig, Element <ds:KeyValue>) or placing them elsewhere. So could you please give a hint or a pointer to where the intended access can be found? BTW: How does one find out which type of ECC is being used (binary or prime)? BTW2: Which compact representation of any public key would you recommend (for program internal comparisons)? Surely i will ban the internal header from my sources as they are not neccessary. Chris
