pub unsafe extern "C" fn RSA_sign_pss_mgf1(
rsa: *mut RSA,
out_len: *mut usize,
out: *mut u8,
max_out: usize,
digest: *const u8,
digest_len: usize,
md: *const EVP_MD,
mgf1_md: *const EVP_MD,
salt_len: c_int,
) -> c_int