pub unsafe extern "C" fn PEM_read_bio_PrivateKey_ex(
out: *mut bio_st,
x: *mut *mut evp_pkey_st,
cb: Option<unsafe extern "C" fn(_: *mut i8, _: i32, _: i32, _: *mut c_void) -> i32>,
u: *mut c_void,
libctx: *mut ossl_lib_ctx_st,
propq: *const i8,
) -> *mut evp_pkey_st