capsicum

包含令人惊叹的功能！

Rust 为 FreeBSD 的 capsicum 框架提供的 OS 能力和沙盒绑定的 Rust 绑定

先决条件

Rust，Cargo 和 FreeBSD。

注意： 目前仅在 FreeBSD 上编译

入门

获取代码

git clone https://github.com/danlrobertson/capsicum-rs
cd capsicum-rs
cargo build

使用 capsicum-rs 编写代码

进入能力模式

    use capsicum::{enter, sandboxed};
    use std::fs::File;
    use std::io::Read;

    let mut ok_file = File::open("/tmp/foo").unwrap();
    let mut s = String::new();

    enter().expect("enter failed!");
    assert!(sandboxed(), "application is not sandboxed!");

    match File::create("/tmp/cant_touch_this") {
        Ok(_) => panic!("application is not properly sandboxed!"),
        Err(e) => println!("properly sandboxed: {:?}", e)
    }

    match ok_file.read_to_string(&mut s) {
        Ok(_) => println!("This is okay since we opened the descriptor before sandboxing"),
        Err(_) => panic!("application is not properly sandboxed!")
    }

限制文件的能力权限

    use capsicum::{CapRights, Right, RightsBuilder};
    use std::fs::File;
    use std::io::Read;

    let x = rand::random::<bool>();
    
    let mut ok_file = File::open("/tmp/foo").unwrap();
    let mut s = String::new();
    
    let mut builder = RightsBuilder::new(Right::Seek);
    
    if x {
        builder.add(Right::Read);
    }

    let rights = builder.finalize().unwrap();

    rights.limit(&ok_file).unwrap();
    
    match ok_file.read_to_string(&mut s) {
        Ok(_) if x => println!("Allowed reading: x = {} ", x),
        Err(_) if !x => println!("Did not allow reading: x = {}", x),
        _ => panic!("Not properly sandboxed"),
    }