I am able to convert the ECC key from compressed to uncompressed (and vice versa) using the "EC_KEY_set_conv_form" call .
On Sun, Jul 17, 2011 at 10:30 AM, Erwin Himawan <ehima...@gmail.com> wrote: > Marti, thanks for your response. > > Erwin > > ------------------------------**-------------------- > From: "Martin Boßlet" <martin.boss...@googlemail.com**> > Sent: Sunday, July 17, 2011 7:21 AM > To: <openssl-users@openssl.org> > Subject: Re: Converting ECC public key point-compressed and uncompressed > > > My understanding is that to convert the form of ecc key from compressed to >>> uncompressed and from uncompressed to compressed require the knowledge of >>> the ECC private key. >>> Is my understanding correct? >>> >> >> You might want to have a look at sections 2.3.3 and 2.3.4 in >> >> http://www.secg.org/download/**aid-780/sec1-v2.pdf<http://www.secg.org/download/aid-780/sec1-v2.pdf> >> >> No knowledge of the private key is needed. >> >> Regards, >> Martin >> ______________________________**______________________________** >> __________ >> OpenSSL Project http://www.openssl.org >> User Support Mailing List openssl-users@openssl.org >> Automated List Manager majord...@openssl.org >> > >
