Function bearssl_sys::br_tls12_sha256_prf

pub unsafe extern "C" fn br_tls12_sha256_prf(
    dst: *mut c_void, 
    len: usize, 
    secret: *const c_void, 
    secret_len: usize, 
    label: *const c_char, 
    seed_num: usize, 
    seed: *const br_tls_prf_seed_chunk
)