Its generating 64 bytes when I print with ECDSA_size(eckey) But i neeed 56 bytes signature.
On 17 December 2012 12:26, jeetendra gangele <gangele...@gmail.com> wrote: > Can anybody guide me how can I generate the digital signature of 56 > bytes for ecdsa. > I am using the curve NID_secp224r1. > Thanks > jeetendra > > On 17 December 2012 09:26, jeetendra gangele <gangele...@gmail.com> wrote: >> Actaully I was trying to generate the signature of lenght 56 bytes but >> its failing. >> When I check the code it said lenght of the sig should not lessa than 56. >> can anybody help me how can I generate the signature of lenght 56 bytes?. >> >> >> On 14 December 2012 19:11, Matt Caswell (fr...@baggins.org) >> <fr...@baggins.org> wrote: >>> >>> On 14 December 2012 13:36, jeetendra gangele <gangele...@gmail.com> wrote: >>>> >>>> Ok, >>>> So is there any way after setting these parameters I can get the >>>> public key(point) on curve.? >>> >>> >>> Setting the parameters just gets you a curve, not a private/public key pair. >>> To create a private/public key pair create an EC_KEY object (passing in the >>> curve as a parameter), and then call EC_KEY_generate_key. Then you can get >>> the public key from the EC_KEY object. >>> >>>> 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? >>>> >>> As far as I know you can't use custom curves from the command line - but I >>> am not an expert on the command line tool so others on this list may be able >>> to answer that. >>> >>> Matt ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
