Computes the double of a EC_POINT \param group underlying EC_GROUP object \param r EC_POINT object for the result (r = 2 * a) \param a EC_POINT object \param ctx BN_CTX object (optional) \return 1 on success and 0 if an error occured
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Computes the double of a EC_POINT \param group underlying EC_GROUP object \param r EC_POINT object for the result (r = 2 * a) \param a EC_POINT object \param ctx BN_CTX object (optional) \return 1 on success and 0 if an error occured