pub unsafe extern "C" fn PEM_ASN1_write(
i2d: Option<unsafe extern "C" fn(*const c_void, *mut *mut u8) -> i32>,
name: *const i8,
fp: *mut _IO_FILE,
x: *const c_void,
enc: *const evp_cipher_st,
kstr: *const u8,
klen: i32,
callback: Option<unsafe extern "C" fn(*mut i8, i32, i32, *mut c_void) -> i32>,
u: *mut c_void,
) -> i32