i>key</i> is NULL or the group parameters are missing, and 0 otherwise.</p>

<p>EC_KEY_precompute_mult() stores multiples of the underlying EC_GROUP generator for faster point multiplication. See also <a href="../man3/EC_POINT_add.html">EC_POINT_add(3)</a>. Modern versions should instead switch to named curves which OpenSSL has hardcoded lookup tables for.</p>

<p>EC_KEY_oct2key() and EC_KEY_key2buf() are identical to the functions EC_POINT_oct2point() and EC_POINT_point2buf() except they use the public key