https://github.com/o8x/cc

https://github.com/o8x/cc

Last synced: 3 months ago
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• Host: GitHub
• URL: https://github.com/o8x/cc
• Owner: o8x
• License: mit
• Created: 2022-10-14T02:10:22.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-11-08T09:42:42.000Z (over 2 years ago)
• Last Synced: 2025-01-17T12:16:16.557Z (5 months ago)
• Language: Go
• Homepage:
• Size: 8.79 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
CryptConn

======

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net.Conn 的封装，采用 cc1 协议进行加密数据传输

# CC1

CC1 是 CC(CryptConn) 协议族的 1.0 版本，本质上是使用 aes 对传输进行加解密的一种 socks like 协议

# CC1 RFC

## 协议握手：

```text

+-------------------------------------+

| protocol | version | cipher |  type |

|-----------------------------|--------

|   2byte  |  1byte  |  1byte | 1byte |

+-------------------------------------+

protocol：协议

    - cc: 0x00cc

version: 版本号

    - 0x10: 1.0

cipher: 加密方法

    - 0x00: 明文

    - 0x01: aes-128-cfb

    - 0x02: aes-192-cfb

    - 0x03: aes-256-cfb

    - 0x11: aes-128-ctr

    - 0x12: aes-192-ctr

    - 0x13: aes-256-ctr

type: 类型

    - 0x02: 客户端

    - 0x05: 服务端

```

示例

```text

        00cc100102

client ---------------> server

        00cc100105

client <--------------- server

```

## 权限验证

```text

+--------------------------------------------------------------------+

|  cmd  | method | username-len | username | password-len | password |

+--------------------------------------------------------------------+

| 1byte | 1byte  |     1byte    |   -bit   |     1byte    |   -bit   |

+--------------------------------------------------------------------+

cmd: 命令类型

    - 0x01：权限验证

    - 0x02：CONNECT

method: 认证方法

    - 0x00: 无权限认证

    - 0x01: USERNAME/PASSWORD 认证

username-len: 用户名长度

username: 用户名

password-len: 密码长度

password: 密码

```

### 响应

```text

+--------------------------+

|  cmd  |  method |  reply |

+--------------------------+

| 1byte |  1byte  |  1byte |

+--------------------------+

method: 认证方法

    - 0x00: 无权限认证

    - 0x01: USERNAME/PASSWORD 认证

reply: 响应

    - 0x01: CMD成功

    - 0x02: CMD失败

    - 0x03: CMD错误

```

## CONNECT

类似 socks5 的 Requests 部分

```text

+------------------------+

|  cmd  | ATYP  | target |

+------------------------+

| 1byte | 1byte |  -byte  |

+------------------------+

ATYP: target 的类型

    - 0x01: 域名

    - 0x02: IP

target: 目标地址

```

### 响应

```text

+------------------------+

|  cmd  |  ATYP  | reply |

+------------------------+

| 1byte | 1byte | 1byte  |

+------------------------+

ATYP: target 的类型

    - 0x01: 域名

    - 0x02: IP

reply: 响应

    - 0x01: CMD成功

    - 0x02: CMD失败

    - 0x03: CMD错误

    - 0x04: 不允许连接

    - 0x05: 找不到主机

    - 0x06: 不支持的 ATYP

```

# Golang Example

- Server [example/server.go](./example/server/main.go)

- Client [example/client.go](./example/client/main.go)