Function botan_sys::botan_kdf

pub unsafe extern "C" fn botan_kdf(
    kdf_algo: *const c_char, 
    out: *mut u8, 
    out_len: usize, 
    secret: *const u8, 
    secret_len: usize, 
    salt: *const u8, 
    salt_len: usize, 
    label: *const u8, 
    label_len: usize
) -> c_int