OpenSSL::PKey::EC.new

static VALUE ossl_ec_key_initialize(int argc, VALUE *argv, VALUE self)
{
    EVP_PKEY *pkey;
    EC_KEY *ec;
    VALUE arg, pass;

    GetPKey(self, pkey);
    if (EVP_PKEY_base_id(pkey) != EVP_PKEY_NONE)
        ossl_raise(eECError, "EC_KEY already initialized");

    rb_scan_args(argc, argv, "02", &arg, &pass);

    if (NIL_P(arg)) {
        if (!(ec = EC_KEY_new()))
            ossl_raise(eECError, NULL);
    } else if (rb_obj_is_kind_of(arg, cEC)) {
        EC_KEY *other_ec = NULL;

        GetEC(arg, other_ec);
        if (!(ec = EC_KEY_dup(other_ec)))
            ossl_raise(eECError, NULL);
    } else if (rb_obj_is_kind_of(arg, cEC_GROUP)) {
        ec = ec_key_new_from_group(arg);
    } else {
        BIO *in;

        pass = ossl_pem_passwd_value(pass);
        in = ossl_obj2bio(&arg);

        ec = PEM_read_bio_ECPrivateKey(in, NULL, ossl_pem_passwd_cb, (void *)pass);
        if (!ec) {
            OSSL_BIO_reset(in);
            ec = PEM_read_bio_EC_PUBKEY(in, NULL, ossl_pem_passwd_cb, (void *)pass);
        }
        if (!ec) {
            OSSL_BIO_reset(in);
            ec = d2i_ECPrivateKey_bio(in, NULL);
        }
        if (!ec) {
            OSSL_BIO_reset(in);
            ec = d2i_EC_PUBKEY_bio(in, NULL);
        }
        BIO_free(in);

        if (!ec) {
            ossl_clear_error();
            ec = ec_key_new_from_group(arg);
        }
    }

    if (!EVP_PKEY_assign_EC_KEY(pkey, ec)) {
        EC_KEY_free(ec);
        ossl_raise(eECError, "EVP_PKEY_assign_EC_KEY");
    }

    return self;
}