Function esp_idf_sys::mbedtls_ecp_export

pub unsafe extern "C" fn mbedtls_ecp_export(
    key: *const mbedtls_ecp_keypair,
    grp: *mut mbedtls_ecp_group,
    d: *mut mbedtls_mpi,
    Q: *mut mbedtls_ecp_point
) -> c_int

\brief This function exports generic key-pair parameters.

\param key The key pair to export from. \param grp Slot for exported ECP group. It must point to an initialized ECP group. \param d Slot for the exported secret value. It must point to an initialized mpi. \param Q Slot for the exported public value. It must point to an initialized ECP point.

\return \c 0 on success, \return #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory-allocation failure. \return #MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE if key id doesn’t correspond to a known group. \return Another negative error code on other kinds of failure.