On 26/11/15 20:18, Matt Loah wrote: > While the public key in the context of OpenSSL Elliptic Curves algorithm is > stored as a EC_POINT pointer... and the private key as a BIGNUM pointer... > which functions (or which kind of them) should be called to encrypt & to > decrypt a message in C/C++ ? OpenSSL doesn't support it out of the box. What you're looking for is something akin to https://en.wikipedia.org/wiki/Integrated_Encryption_Scheme. Ladar Levison has written an implementation which uses OpenSSL as a backend. I tried finding it for you, but my connection (mobile, on train) is so bad that I couldn't be bothered to keep trying. If you google for it I'm sure you'll find it pretty easily. If you can't find it -- it's not difficult to do it from scratch using that wikipedia page and the OpenSSL reference manuals. /Jan
