Proof of concpet
Define the environment variable EiffelOpenSSL to point to the source code.
https://www.openssl.org/docs/man1.1.0/crypto/ECDSA_do_sign.html https://wiki.openssl.org/index.php/Elliptic_Curve_Cryptography https://wiki.openssl.org/index.php/Elliptic_Curve_Diffie_Hellman