Ok, So is there any way after setting these parameters I can get the public key(point) on curve.? after setting the curve parameter I can ask for point in the curve there is one API I have seen right? GetPublicKey. Can u do that from command line?
thanks jeetendra On 14 December 2012 18:40, Matt Caswell (fr...@baggins.org) <fr...@baggins.org> wrote: > Yes there is a dependency. The curve parameters define what the curve is, > whilst the public key is a point on the curve. The public key is inherently > linked to the curve parameters. If you change the parameters then the public > key will no longer be valid. > > Matt > > On 14 December 2012 12:42, jeetendra gangele <gangele...@gmail.com> wrote: >> >> Ok Do you know if there any dependency between these curve parameters >> and private and public key.? >> >> I mean I am loading these parameters and generating private and public >> keys from Openssl command line tools. >> It did not worked for me . >> but when i use standard curve and load public and private keys it worked >> for me. >> So is there any relation between curve parameters and public and private >> keys. >> >> >> thanks >> >> >> >> On 14 December 2012 18:07, jeetendra gangele <gangele...@gmail.com> wrote: >> > I got these parameters from marlin and I wanted to load these parameter. >> > Its must for me to load these parameters. >> > >> > >> > On 14 December 2012 17:37, Matt Caswell (fr...@baggins.org) >> > <fr...@baggins.org> wrote: >> >> >> >> >> >> On 14 December 2012 11:47, jeetendra gangele <gangele...@gmail.com> >> >> wrote: >> >>> >> >>> Thanks >> >>> But i have these parameters and I wanted to load them p,a,b,q >> >>> Do u know how can i load them? >> >>> >> >> >> >> The parameters are related to the definition of the curve. Where did >> >> you get >> >> the parameters from? Are you sure they are not just the parameters from >> >> a >> >> standard curve? It is much better to use the standard built in curves >> >> that >> >> attempting to create your own. Can you ask the person that supplied you >> >> with >> >> these parameters to tell you which standard curve they are using? >> >> >> >> If you really *have* to use the parameters directly, and they are not >> >> from a >> >> standard curve then you will need to create the curve yourself. You can >> >> use >> >> EC_GROUP_new_curve_GFp for an Fp (NID_X9_62_prime_field) curve or >> >> EC_GROUP_new_curve_GF2m for an F2m (NID_X9_62_characteristic_two_field) >> >> curve. You will also need to call EC_GROUP_set_generator to set the >> >> generator point for the curve. >> >> >> >> Matt >> ______________________________________________________________________ >> OpenSSL Project http://www.openssl.org >> User Support Mailing List openssl-users@openssl.org >> Automated List Manager majord...@openssl.org > > ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
