MCP Servers

hexforge-mcp

A hex computation MCP server for binary security and reverse engineering, providing precise arithmetic, bitwise operations, and data conversion tools.

README

hexforge-mcp

专为二进制安全 / 逆向工程场景打造的十六进制计算 MCP 服务器。让 AI 大模型把精确计算交给工具完成,不再靠"心算"做地址运算、进制转换和位操作。

特性

机器字语义:所有运算按 2^bits 取模回绕,模拟真实 CPU 寄存器溢出
双解释输出:每个结果同时给出 hex / 无符号十进制 / 有符号十进制 / 二进制
输入宽容:接受 0x41、4142、41 42、\x41\x42 等常见格式
安全求值:表达式基于 AST 白名单解析,杜绝代码注入
零依赖启动:只需 Python ≥ 3.10 和 mcp 包

工具一览

工具	用途	示例
`evaluate`	算术/位运算表达式(`+ - * / % ** & \| ^ ~ << >>`、括号),按位宽回绕	`(0x400000 + 0x1234) & ~0xfff` → `0x401000`
`convert`	进制转换(hex/dec/bin/oct),可选位宽有符号解释	`0xff` @8位 → 有符号 `-1`
`bit_rotate`	循环移位 ROL / ROR	`rol(0x12345678, 8)` → `0x34567812`
`bytes_swap`	字节序翻转(大小端互换)	`0x11223344` → `0x44332211`
`pack_value`	数值打包为字节(u8~u64 / i8~i64 / f32 / f64,大小端)	`0x11223344` as u32 LE → `44332211`
`unpack_value`	字节解包为数值(pack 的逆操作)	`44332211` as u32 LE → `0x11223344`
`xor_data`	循环密钥 XOR(Shellcode 解码、混淆字符串还原)	`68656c6c6f` ⊕ `00` → `hello`
`align`	地址对齐(向上/向下/检查)	`0x1234` @ `0x1000` 向上 → `0x2000`

evaluate 语义说明

/ 与 // 均为无符号整除(操作数按无符号机器字处理)
>> 为逻辑右移;<< 移位超位宽时结果为 0(回绕语义)
一元 -x 等价于 (-x) & mask,~x 等价于 mask ^ x
bits 参数 1~4096,默认 64

安装与配置

依赖:Python ≥ 3.10,pip install mcp(本项目仅用此一个依赖)。

Claude Desktop

在 claude_desktop_config.json 中加入:

{
  "mcpServers": {
    "hexforge": {
      "command": "python",
      "args": ["path/to/hexforge-mcp/hexforge_mcp/server.py"]
    }
  }
}

Kimi Code / 其他 MCP 客户端

同上,command 为 python,args 指向 hexforge_mcp/server.py 的绝对路径即可。也可以在仓库根目录使用模块方式启动:

{
  "mcpServers": {
    "hexforge": {
      "command": "python",
      "args": ["-m", "hexforge_mcp.server"],
      "cwd": "path/to/hexforge-mcp"
    }
  }
}

安装为命令后也可以使用:pip install . 然后 command 填 hexforge-mcp。

开发与测试

# 单元测试(66 个用例)
python -m pytest -q

# 端到端冒烟测试:通过 stdio 真实启动 server 并调用工具
python tests/smoke_client.py

项目结构

hexforge-mcp/
├── hexforge_mcp/
│   ├── core.py      # 纯计算逻辑(不依赖 mcp,可独立测试)
│   └── server.py    # FastMCP 入口,将 core 包装为 8 个 MCP 工具
├── pyproject.toml
└── README.md

License

MIT

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