traylinx-auth-client/SECURITY.md

Enterprise-grade authentication client with Agent-to-Agent (A2A) Protocol support for Traylinx Sentinel API and agent-to-agent communication

# Security Policy

## Supported Versions

We actively support the following versions of TraylinxAuthClient with security updates:

| Version | Supported          |
| ------- | ------------------ |
| 1.0.x   | :white_check_mark: |
| < 1.0   | :x:                |

## Security Features

TraylinxAuthClient implements several security measures to protect your authentication credentials and communications:

### Input Validation
- **Comprehensive Parameter Validation**: All configuration parameters are validated using Joi to prevent injection attacks
- **URL Sanitization**: API URLs are validated and sanitized to prevent malicious redirects
- **UUID Format Validation**: Agent User IDs must be valid UUIDs to prevent format-based attacks

### Credential Protection
- **No Credential Logging**: Tokens, secrets, and passwords are never logged or exposed in error messages
- **Secure Memory Handling**: Sensitive data is handled securely in memory and cleaned up appropriately
- **Error Message Sanitization**: Error messages are sanitized to prevent accidental credential exposure

### Network Security
- **HTTPS Enforcement**: All communications use HTTPS with proper certificate validation
- **Timeout Protection**: Configurable timeouts prevent hanging connections and resource exhaustion
- **Rate Limit Handling**: Built-in rate limiting protection with exponential backoff

### Token Security
- **Automatic Token Refresh**: Tokens are automatically refreshed before expiration
- **Async-Safe Token Management**: Token access is protected for concurrent async operations
- **Secure Token Storage**: Tokens are stored securely in memory with appropriate cleanup

## Reporting a Vulnerability

We take security vulnerabilities seriously. If you discover a security vulnerability in TraylinxAuthClient, please report it responsibly.

### How to Report

**DO NOT** create a public GitHub issue for security vulnerabilities.

Instead, please report security vulnerabilities through one of these channels:

1. **Email**: Send details to `security@traylinx.com`
2. **GitHub Security Advisory**: Use GitHub's private vulnerability reporting feature
3. **Direct Contact**: Contact the maintainers directly through secure channels

### What to Include

When reporting a vulnerability, please include:

- **Description**: Clear description of the vulnerability
- **Impact**: Potential impact and attack scenarios
- **Reproduction**: Step-by-step instructions to reproduce the issue
- **Environment**: Node.js version, library version, and operating system
- **Proof of Concept**: Code or commands that demonstrate the vulnerability (if applicable)
- **Suggested Fix**: If you have ideas for fixing the issue

### Example Report Template

```
Subject: [SECURITY] Vulnerability in TraylinxAuthClient v1.0.x

Description:
[Clear description of the vulnerability]

Impact:
[What could an attacker do with this vulnerability?]

Steps to Reproduce:
1. [First step]
2. [Second step]
3. [Additional steps...]

Environment:
- TraylinxAuthClient version: 1.0.x
- Node.js version: v18.x.x
- Operating System: [OS and version]

Proof of Concept:
[Code or commands that demonstrate the issue]

Suggested Fix:
[Your ideas for fixing the vulnerability]
```

## Response Process

### Timeline

We aim to respond to security reports according to the following timeline:

- **Initial Response**: Within 24 hours of receiving the report
- **Vulnerability Assessment**: Within 72 hours of initial response
- **Fix Development**: Depends on complexity, typically 1-2 weeks
- **Security Release**: Within 1 week of fix completion
- **Public Disclosure**: 30 days after fix release (coordinated disclosure)

### Our Commitment

When you report a vulnerability, we commit to:

1. **Acknowledge Receipt**: Confirm we received your report within 24 hours
2. **Regular Updates**: Provide status updates at least weekly during investigation
3. **Credit**: Acknowledge your contribution in the security advisory (if desired)
4. **Coordinated Disclosure**: Work with you on appropriate disclosure timing
5. **Fix Priority**: Treat security issues as high priority

### Severity Classification

We classify vulnerabilities using the following severity levels:

#### Critical (CVSS 9.0-10.0)
- Remote code execution
- Authentication bypass
- Credential theft
- **Response Time**: Immediate (within hours)

#### High (CVSS 7.0-8.9)
- Privilege escalation
- Information disclosure of sensitive data
- Denial of service attacks
- **Response Time**: Within 24 hours

#### Medium (CVSS 4.0-6.9)
- Limited information disclosure
- Input validation issues
- Configuration vulnerabilities
- **Response Time**: Within 72 hours

#### Low (CVSS 0.1-3.9)
- Minor information leaks
- Non-exploitable issues
- **Response Time**: Within 1 week

## Security Best Practices

### For Users

When using TraylinxAuthClient, follow these security best practices:

#### Credential Management
```javascript
// ✅ Good: Use environment variables
const { TraylinxAuthClient } = require('traylinx-auth-client');

const client = new TraylinxAuthClient({
    clientId: process.env.TRAYLINX_CLIENT_ID,
    clientSecret: process.env.TRAYLINX_CLIENT_SECRET,
    apiBaseUrl: process.env.TRAYLINX_API_BASE_URL,
    agentUserId: process.env.TRAYLINX_AGENT_USER_ID
});

// ❌ Bad: Hard-coded credentials
const client = new TraylinxAuthClient({
    clientId: 'hardcoded_id',
    clientSecret: 'hardcoded_secret',  // Never do this!
    // ...
});
```

#### Secure Configuration
```javascript
// ✅ Good: Secure configuration
const client = new TraylinxAuthClient({
    // ... credentials from environment
    timeout: 30000,  // Reasonable timeout (30 seconds)
    maxRetries: 3,   // Limited retries
    logLevel: 'INFO' // Don't use DEBUG in production
});

// ❌ Bad: Insecure configuration
const client = new TraylinxAuthClient({
    // ... credentials
    timeout: 300000,  // Too long (5 minutes), resource exhaustion risk
    maxRetries: 100,  // Too many, potential DoS
    logLevel: 'DEBUG' // May expose sensitive data in production
});
```

#### Error Handling
```javascript
// ✅ Good: Secure error handling
const { TraylinxAuthError } = require('traylinx-auth-client');

try {
    const result = await client.authenticate();
} catch (error) {
    if (error instanceof TraylinxAuthError) {
        console.error(`Authentication failed: ${error.code}`);
        // Don't log the full error (may contain sensitive data)
    }
}

// ❌ Bad: Insecure error handling
try {
    const result = await client.authenticate();
} catch (error) {
    console.error(`Error: ${error.message}`);  // May expose credentials
    console.log('Full error:', error);         // Never log full errors
}
```

#### Express Middleware Security
```javascript
// ✅ Good: Secure middleware usage
const { authMiddleware } = require('traylinx-auth-client');

app.use('/api', authMiddleware({
    clientId: process.env.TRAYLINX_CLIENT_ID,
    clientSecret: process.env.TRAYLINX_CLIENT_SECRET,
    apiBaseUrl: process.env.TRAYLINX_API_BASE_URL,
    agentUserId: process.env.TRAYLINX_AGENT_USER_ID,
    timeout: 30000,
    logLevel: 'INFO'
}));

// ❌ Bad: Insecure middleware usage
app.use('/api', authMiddleware({
    clientId: 'hardcoded_id',      // Never hardcode credentials
    clientSecret: 'hardcoded_secret',
    // ... other hardcoded values
    logLevel: 'DEBUG'              // Don't use DEBUG in production
}));
```

### For Developers

#### Secure Development
- Always validate input parameters using Joi schemas
- Never log sensitive data (tokens, secrets, passwords)
- Use secure defaults for all configuration options
- Implement proper error handling without information leakage
- Follow the principle of least privilege

#### Async Security
```javascript
// ✅ Good: Secure async handling
async function handleRequest(req, res) {
    try {
        const result = await client.authenticate();
        // Process result securely
        res.json({ success: true });
    } catch (error) {
        // Log error securely (no sensitive data)
        console.error('Auth failed:', error.code);
        res.status(401).json({ error: 'Authentication failed' });
    }
}

// ❌ Bad: Insecure async handling
async function handleRequest(req, res) {
    const result = await client.authenticate(); // No error handling
    res.json(result); // May expose sensitive data
}
```

#### Testing Security
- Include security test cases in your test suite
- Test with invalid and malicious inputs
- Verify that sensitive data is not logged or exposed
- Test timeout and rate limiting behavior
- Use static analysis tools (ESLint security plugins)

## Security Updates

### Notification

Security updates are announced through:
- GitHub Security Advisories
- Release notes in CHANGELOG.md
- npm release notifications
- Email notifications to registered users (if applicable)

### Applying Updates

Always update to the latest version promptly when security updates are released:

```bash
# Update to latest version
npm update traylinx-auth-client

# Or with Yarn
yarn upgrade traylinx-auth-client

# Check for security vulnerabilities
npm audit
npm audit fix
```

### Package Security

Regularly audit your dependencies:
```bash
# Check for known vulnerabilities
npm audit

# Fix automatically fixable vulnerabilities
npm audit fix

# Check for outdated packages
npm outdated
```

## Vulnerability Disclosure Policy

### Coordinated Disclosure

We follow responsible disclosure practices:

1. **Private Reporting**: Vulnerabilities are reported privately first
2. **Investigation Period**: We investigate and develop fixes privately
3. **Coordinated Release**: Security fixes are released with advance notice
4. **Public Disclosure**: Details are disclosed after fixes are available

### Hall of Fame

We maintain a security hall of fame to recognize researchers who help improve our security:

- [Researcher Name] - [Vulnerability Type] - [Date]
- [Add your name by reporting a valid security issue!]

## Node.js Security Considerations

### Version Support
- Use supported Node.js versions (14+)
- Keep Node.js updated to latest LTS versions
- Monitor Node.js security advisories

### Environment Variables
```javascript
// ✅ Good: Secure environment variable usage
const config = {
    clientId: process.env.TRAYLINX_CLIENT_ID,
    clientSecret: process.env.TRAYLINX_CLIENT_SECRET,
    // Validate environment variables exist
};

if (!config.clientId || !config.clientSecret) {
    throw new Error('Missing required environment variables');
}

// ❌ Bad: No validation
const config = {
    clientId: process.env.TRAYLINX_CLIENT_ID, // May be undefined
    clientSecret: process.env.TRAYLINX_CLIENT_SECRET,
};
```

### Memory Management
```javascript
// ✅ Good: Proper cleanup
class SecureClient {
    constructor(config) {
        this.client = new TraylinxAuthClient(config);
    }
    
    async cleanup() {
        // Clear sensitive data
        if (this.client) {
            await this.client.cleanup();
            this.client = null;
        }
    }
}

// ❌ Bad: No cleanup
const client = new TraylinxAuthClient(config);
// Client and tokens remain in memory indefinitely
```

## Contact Information

### Security Team
- **Email**: security@traylinx.com
- **PGP Key**: [Link to public key if available]
- **Response Hours**: Monday-Friday, 9 AM - 5 PM UTC

### Maintainers
- **Primary**: [@maintainer1](https://github.com/maintainer1)
- **Secondary**: [@maintainer2](https://github.com/maintainer2)

## Additional Resources

- [Node.js Security Best Practices](https://nodejs.org/en/docs/guides/security/)
- [OWASP Top 10](https://owasp.org/www-project-top-ten/)
- [npm Security Guidelines](https://docs.npmjs.com/security)
- [GitHub Security Best Practices](https://docs.github.com/en/code-security)
- [CVE Database](https://cve.mitre.org/)

---

Thank you for helping keep TraylinxAuthClient secure!