On Fri, Jul 15, 2011, Kenneth Goldman wrote: > I have to extract a binary (unsigned char *) representation of a public > key from an ECDSA openssl key structure. Later, I want to use that binary > to reconstruct an openssl public key structure that I can use to verify a > signature. The curve is fixed - P521. > > I don't need any certificates, just a public key that I can embed in the > verifier. > > Can someone point me toward sample code? Or, can someone give me some > hints? >
One way that works with all key types is to encode as a SubjectPublicKeyInfo structure (as used by certificates). The functions i2d_EC_PUBKEY() and d2i_EC_PUBKEY() will do the trick for EC keys. Steve. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
