gnoma/TODO.md

Gnoma ELF Support - TODO List

Overview

This document outlines the steps to add ELF (Executable and Linkable Format) support to Gnoma, enabling features like ELF parsing, disassembly, security analysis, and binary manipulation.

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📌 Goals

• Add ELF-specific tools to Gnoma’s toolset.
• Enable users to analyze, disassemble, and manipulate ELF binaries.
• Integrate with Gnoma’s existing permission and security systems.

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✅ Implementation Steps

1. Design ELF Tools

• elf.parse: Parse and display ELF headers, sections, and segments.
• elf.disassemble: Disassemble code sections (e.g., .text) using objdump or a pure-Go disassembler.
• elf.analyze: Perform security analysis (e.g., check for packed binaries, missing security flags).
• elf.patch: Modify binary bytes or inject code (advanced feature).
• elf.symbols: Extract and list symbols from the symbol table.

2. Implement ELF Tools

• Create a new package: internal/tool/elf.
• Implement each tool as a struct with Name() and Run(args map[string]interface{}) methods.
• Use debug/elf (standard library) or third-party libraries like github.com/xyproto/elf for parsing.
• Add support for external tools like objdump and radare2 for disassembly.

Example: elf.Parse Tool

package elf

import (
    "debug/elf"
    "fmt"
    "os"
)

type ParseTool struct{}

func NewParseTool() *ParseTool {
    return &ParseTool{}
}

func (t *ParseTool) Name() string {
    return "elf.parse"
}

func (t *ParseTool) Run(args map[string]interface{}) (string, error) {
    filePath, ok := args["file"].(string)
    if !ok {
        return "", fmt.Errorf("missing 'file' argument")
    }

    f, err := os.Open(filePath)
    if err != nil {
        return "", fmt.Errorf("failed to open file: %v", err)
    }
    defer f.Close()

    ef, err := elf.NewFile(f)
    if err != nil {
        return "", fmt.Errorf("failed to parse ELF: %v", err)
    }
    defer ef.Close()

    // Extract and format ELF headers
    output := fmt.Sprintf("ELF Header:\n%s\n", ef.FileHeader)
    output += fmt.Sprintf("Sections:\n")
    for _, s := range ef.Sections {
        output += fmt.Sprintf("  - %s (size: %d)\n", s.Name, s.Size)
    }
    output += fmt.Sprintf("Program Headers:\n")
    for _, p := range ef.Progs {
        output += fmt.Sprintf("  - Type: %s, Offset: %d, Vaddr: %x\n", p.Type, p.Off, p.Vaddr)
    }

    return output, nil
}

3. Integrate ELF Tools with Gnoma

• Update buildToolRegistry() in cmd/gnoma/main.go to register ELF tools:

  func buildToolRegistry() *tool.Registry {
      reg := tool.NewRegistry()
      reg.Register(bash.New())
      reg.Register(fs.NewReadTool())
      reg.Register(fs.NewWriteTool())
      reg.Register(fs.NewEditTool())
      reg.Register(fs.NewGlobTool())
      reg.Register(fs.NewGrepTool())
      reg.Register(fs.NewLSTool())
      reg.Register(elf.NewParseTool())      // New ELF tool
      reg.Register(elf.NewDisassembleTool()) // New ELF tool
      reg.Register(elf.NewAnalyzeTool())    // New ELF tool
      return reg
  }
  

4. Add Documentation

• Add usage examples to docs/elf-tools.md.
• Update CLAUDE.md with ELF tool capabilities.

5. Testing

• Test ELF tools on sample binaries (e.g., /bin/ls, /bin/bash).
• Test edge cases (e.g., stripped binaries, packed binaries).
• Ensure integration with Gnoma’s permission and security systems.

6. Security Considerations

• Sandbox ELF tools to prevent malicious binaries from compromising the system.
• Validate file paths and arguments to avoid directory traversal or arbitrary file writes.
• Use Gnoma’s firewall to scan ELF tool outputs for suspicious patterns.

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🛠️ Dependencies

• Go Libraries:
  • debug/elf (standard library).
  • github.com/xyproto/elf (third-party).
  • github.com/anchore/go-elf (third-party).
• External Tools:
  • objdump (for disassembly).
  • readelf (for detailed ELF analysis).
  • radare2 (for advanced reverse engineering).

---

📝 Example Usage

Interactive Mode

> Use the elf.parse tool to analyze /bin/ls
> elf.parse --file /bin/ls

Pipe Mode

echo '{"file": "/bin/ls"}' | gnoma --tool elf.parse

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🚀 Future Enhancements

• Add support for PE (Portable Executable) and Mach-O formats.
• Integrate with Ghidra or IDA Pro for advanced analysis.
• Add automated exploit detection for binaries.