pub unsafe extern "C" fn CRYPTO_tls1_prf(
digest: *const EVP_MD,
out: *mut u8,
out_len: usize,
secret: *const u8,
secret_len: usize,
label: *const c_char,
label_len: usize,
seed1: *const u8,
seed1_len: usize,
seed2: *const u8,
seed2_len: usize,
) -> c_int