dbakit/corplink-rs

使用 rust 实现的飞连客户端

corplink-rs

使用 rust 实现的 飞连 客户端

安装

ArchLinux

下载 release 中的安装包，并安装

pacman -U corplink-rs-2.1-1-x86_64.pkg.tar.zst

欢迎贡献其它包管理器的打包脚本

手动编译

git clone https://github.com/PinkD/corplink-rs --depth 1
cd corplink-rs
cargo build --release
# install corplink-rs to your PATH
mv target/release/corplink-rs /usr/bin/
cd ..
git clone https://github.com/PinkD/wireguard-go --depth 1
cd wireguard-go
# you can build with `go build` on windows maunally
make
# install wg-corplink to your PATH
# your can also install it to somewhere else and use wg_binary config to tell corplink-rs where it is
mv wireguard-go /usr/bin/wg-corplink

用法

该程序需要 root 权限来启动 wg-go (windows 上需要管理员权限)

# direct
corplink-rs config.json
# systemd
# config is /etc/corplink/config.json
systemctl start corplink-rs.service
# auto start
systemctl enable corplink-rs.service

# systemd with custom config
# config is /etc/corplink/test.json
# NOTE: cookies.json is reserved by cookie storage
systemctl start corplink-rs@test.service

windows 特殊说明

windows 中启动 wg-go 需要 wintun 支持，请到官网下载，并将 wintun.dll 与 wg-go 放到同一目录下(或者环境变量下)

windows 中 wg-go 默认使用的 pipe 来实现 ipc ，但是我发现权限有问题，所以改成了 Windows AF_UNIX

配置文件实例

最小配置

{
  "company_name": "company code name",
  "username": "your_name"
}

推荐配置(自用配置)

{
  "company_name": "company code name",
  "username": "your_name",
  "password": "your_pass",
  "platform": "ldap"
}

完整配置

{
  "company_name": "company code name",
  "username": "your_name",
  // support sha256sum hashed pass if you don't use ldap, will ask email for code if not provided
  "password": "your_pass",
  // default is feilian, can be feilian/ldap/feishu, feishu is not supported yet
  "platform": "ldap",
  "code": "totp code",
  // default is DollarOS(not CentOS)
  "device_name": "any string to describe your device",
  "device_id": "md5 of device_name or any string with same format",
  "public_key": "wg public key, can be generated from private key",
  "private_key": "wg private key",
  "server": "server link",
  // will use corplink as interface name
  "interface_name": "corplink",
  // will use wg-corplink as wireguard-go
  "wg_binary": "wg-corplink"
}

原理和分析

飞连 是基于 wg-go 魔改的企业级 VPN 产品

配置原理

魔改了配置的方式，加了鉴权

猜测是：

• 动态管理 peer
• 客户端通过验证后，使用 public key 来请求连接，然后服务端就将客户端的 key 加到 peer 库里，然后将配置返回给客户端，等待客户端连接
  • wg 是支持同一个接口上连多个 peer ，所以这样是 OK 的
• 定时将不活跃的客户端清理，释放分配的 IP
• ...

因此，我们只需要生成 wg 的 key ，然后去找服务端拿配置，然后写到 wg 配置里，启动 wg ，就能连上服务端了

后续改动

2.0.9 版本(或者更早)新增了 protocol_version 字段，需要使用魔改后的 wg-corplink 才能连接

请求流程

Linux

graph TD;
    A[Password Login];
    B[Request Email Code];
    C[Email Login];
    D[Verify 2-FA];
    E[List VPN];
    F[Ping VPN];
    G[Connect VPN];
    A-->D;
    B-->C-->D;
    D-->E-->F-->G;

Android

graph TD;
    A[Password Login];
    B[Request Email Code];
    C[Email Login];
    D[List VPN];
    E[Ping VPN];
    F[Connect VPN With 2-FA Code];
    A-->D;
    B-->C;
    C-->D-->E-->F;

otp 实现

飞连的 otp 是使用的标准的 totp ，在 ua 为 Android 时，会在登录时返回 totp 的 token ，然后使用 totp 算法就能生成出当前时间的验证码了，然后在获取连接信息时传输该验证码，就不需要单独验证验证码了

TODO

• windows/mac 实现
• 为不同配置生成不同的 cookie.json
• 自动使用从服务器返回的请求中的时间戳同步时间
• 自动生成 wg key
• 修复服务端异常断开连接后客户端不会退出的问题

Changelog

• 0.3.0
  • add windows/mac support
• 0.2.3
  • fix empty protocol_version
  • add privilege check
• 0.2.2
  • fix wg-corplink not exit if corplink-rs exit accidently
• 0.2.1
  • use modified wireguard-go
    • don't generate config anymore
  • remove conf_name/conf_dir and add interface_name/wg_binary in config
• 0.1.4
  • get company name from company code automatically
  • support ldap
  • check and skip tcp wg server
  • optimize config
• 0.1.3
  • disconnect if wireguard handshake timeout
• 0.1.2
  • support time correction for totp
• 0.1.1
  • support generate wg key
• 0.1.0
  • first version

参考链接

• wg-go
• totp
• python 版本
• wg-corplink
• wintun
• Windows AF_UNIX

License

 Copyright (C) 2022  PinkD

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.