Data Leak Detector

Scan skills, files, and folders for potential data leaks and privacy risks.

Features

• 🔍 Static Analysis: Scan SKILL.md for suspicious patterns
• 🌐 Network Detection: Detect external API calls
• 📁 File Access: Detect file read/write operations
• 🔄 Process Detection: Detect subprocess spawning
• 🔐 Env Access: Detect environment variable access
• 📊 Risk Scoring: 0-100 risk score with recommendations

Risk Levels

Detection Patterns

Network Risks

• curl/wget calls
• requests/httpx usage
• External API endpoints
• WebSocket connections

File Risks

• File read/write operations
• Directory traversal
• Sensitive file access
• Temporary file creation

Process Risks

• subprocess calls
• os.system usage
• Shell command execution
• Process spawning

Environment Risks

• Environment variable access
• Config file reading
• Credential access

Trigger Conditions

• "检查这个skill安全吗" / "Check if this skill is safe"
• "扫描数据泄露" / "Scan for data leaks"
• "这个skill有没有风险" / "Does this skill have risks"
• "data-leak-detector"

Python Code

import os
import re
import json
from pathlib import Path

class DataLeakDetector:
    def __init__(self):
        self.patterns = {
            'network': {
                'high': [
                    r'curl\s+',
                    r'wget\s+',
                    r'requests\.(get|post|put|delete)',
                    r'http[s]?://',
                    r'urllib\.request',
                    r'httpx\.',
                    r'websocket',
                ],
                'medium': [
                    r'fetch\(',
                    r'axios\.',
                ]
            },
            'file_access': {
                'high': [
                    r'open\s*\(',
                    r'os\.remove',
                    r'os\.rmdir',
                    r'shutil\.rmtree',
                ],
                'medium': [
                    r'readFile',
                    r'writeFile',
                    r'os\.path\.exists',
                    r'glob\.',
                ]
            },
            'process': {
                'high': [
                    r'subprocess\.',
                    r'os\.system',
                    r'os\.popen',
                    r'exec\(',
                    r'eval\(',
                ],
                'medium': [
                    r'Popen',
                    r'call\(',
                ]
            },
            'env_access': {
                'high': [
                    r'os\.environ',
                    r'os\.getenv',
                    r'\$[A-Z_]+',
                ],
                'medium': [
                    r'config\[',
                    r'secrets\[',
                ]
            }
        }
    
    def scan_file(self, filepath):
        """Scan a single file for risks"""
        
        risks = []
        
        try:
            with open(filepath, 'r', encoding='utf-8') as f:
                content = f.read()
        except:
            return risks
        
        for category, levels in self.patterns.items():
            for level, patterns in levels.items():
                for pattern in patterns:
                    matches = re.finditer(pattern, content, re.IGNORECASE)
                    for match in matches:
                        line_num = content[:match.start()].count('\n') + 1
                        risks.append({
                            'category': category,
                            'level': level,
                            'pattern': pattern,
                            'line': line_num,
                            'match': match.group()[:50]
                        })
        
        return risks
    
    def scan_skill(self, skill_path):
        """Scan entire skill for risks"""
        
        skill_path = Path(skill_path)
        
        all_risks = []
        files_scanned = 0
        
        for ext in ['.md', '.py', '.js', '.ts']:
            for filepath in skill_path.rglob(f'*{ext}'):
                risks = self.scan_file(str(filepath))
                for risk in risks:
                    risk['file'] = str(filepath.relative_to(skill_path))
                all_risks.extend(risks)
                files_scanned += 1
        
        return all_risks, files_scanned
    
    def calculate_risk_score(self, risks):
        """Calculate overall risk score (0-100)"""
        
        if not risks:
            return 0
        
        score = 0
        for risk in risks:
            if risk['level'] == 'high':
                score += 20
            elif risk['level'] == 'medium':
                score += 10
        
        return min(score, 100)
    
    def generate_report(self, skill_path, risks, files_scanned):
        """Generate risk assessment report"""
        
        risk_score = self.calculate_risk_score(risks)
        
        if risk_score <= 20:
            risk_level = "🟢 LOW"
            recommendation = "Safe to use"
        elif risk_score <= 50:
            risk_level = "🟡 MEDIUM"
            recommendation = "Review before installing"
        else:
            risk_level = "🔴 HIGH"
            recommendation = "Caution required"
        
        # Group by category
        by_category = {}
        for risk in risks:
            cat = risk['category']
            if cat not in by_category:
                by_category[cat] = []
            by_category[cat].append(risk)
        
        report = []
        report.append(f"{'='*60}")
        report.append(f"DATA LEAK DETECTOR - SECURITY REPORT")
        report.append(f"{'='*60}")
        report.append(f"")
        report.append(f"Skill: {os.path.basename(skill_path)}")
        report.append(f"Files Scanned: {files_scanned}")
        report.append(f"Total Risks Found: {len(risks)}")
        report.append(f"")
        report.append(f"RISK SCORE: {risk_score}/100 ({risk_level})")
        report.append(f"RECOMMENDATION: {recommendation}")
        report.append(f"")
        
        # Category breakdown
        report.append(f"{'='*60}")
        report.append(f"RISK BREAKDOWN")
        report.append(f"{'='*60}")
        
        for category, category_risks in by_category.items():
            high = len([r for r in category_risks if r['level'] == 'high'])
            medium = len([r for r in category_risks if r['level'] == 'medium'])
            report.append(f"")
            report.append(f"{category.upper()}:")
            report.append(f"  High: {high} | Medium: {medium}")
            
            for risk in category_risks[:3]:  # Show top 3
                report.append(f"  - [{risk['level'].upper()}] {risk['match']} (line {risk['line']})")
        
        # Recommendations
        report.append(f"")
        report.append(f"{'='*60}")
        report.append(f"RECOMMENDATIONS")
        report.append(f"{'='*60}")
        
        if 'network' in by_category:
            report.append(f"- Review network calls: verify destinations")
        if 'file_access' in by_category:
            report.append(f"- Review file access: check for sensitive files")
        if 'process' in by_category:
            report.append(f"- Review subprocess calls: verify commands")
        if 'env_access' in by_category:
            report.append(f"- Review env access: check for credential access")
        
        return '\n'.join(report)

# Example usage
detector = DataLeakDetector()

# Scan skill
risks, files_scanned = detector.scan_skill('/path/to/skill')
report = detector.generate_report('/path/to/skill', risks, files_scanned)
print(report)

Usage Examples

User: "检查这个skill安全吗"
Agent: Scan SKILL.md and generate risk report

User: "扫描我的skills有没有数据泄露"
Agent: Scan all installed skills

User: "这个skill有没有网络访问"
Agent: Focus on network risks

Notes

• Static analysis only (no runtime monitoring)
• Fast scanning (seconds)
• No external API calls
• Cross-platform compatible