Function mbedtls_sys::mbedtls_ecdsa_write_signature

pub unsafe extern "C" fn mbedtls_ecdsa_write_signature(
    ctx: *mut mbedtls_ecdsa_context, 
    md_alg: mbedtls_md_type_t, 
    hash: *const c_uchar, 
    hlen: size_t, 
    sig: *mut c_uchar, 
    slen: *mut size_t, 
    f_rng: Option<unsafe extern "C" fn(_: *mut c_void, _: *mut c_uchar, _: size_t) -> c_int>, 
    p_rng: *mut c_void
) -> c_int