Function mbedtls_sys::ecdsa_sign

pub unsafe extern "C" fn ecdsa_sign(
    grp: *mut ecp_group,
    r: *mut mpi,
    s: *mut mpi,
    d: *const mpi,
    buf: *const c_uchar,
    blen: usize,
    f_rng: Option<unsafe extern "C" fn(arg1: *mut c_void, arg2: *mut c_uchar, arg3: usize) -> c_int>,
    p_rng: *mut c_void
) -> c_int