gamma-security-basics skill

---
name: gamma-security-basics
description: |
  Implement security best practices for Gamma integration.
  Use when securing API keys, implementing access controls,
  or auditing Gamma security configuration.
  Trigger with phrases like "gamma security", "gamma API key security",
  "gamma secure", "gamma credentials", "gamma access control".
allowed-tools: Read, Write, Edit, Grep
version: 1.0.0
license: MIT
author: Jeremy Longshore <[email protected]>
---

# Gamma Security Basics

## Overview
Security best practices for Gamma API integration to protect credentials and data.

## Prerequisites
- Active Gamma integration
- Environment variable support
- Understanding of secret management

## Instructions

### Step 1: Secure API Key Storage
```typescript
// NEVER do this
const gamma = new GammaClient({
  apiKey: 'gamma_live_abc123...', // Hardcoded - BAD!
});

// DO this instead
const gamma = new GammaClient({
  apiKey: process.env.GAMMA_API_KEY,
});
```

**Environment Setup:**
```bash
# .env (add to .gitignore!)
GAMMA_API_KEY=gamma_live_abc123...

# Load in application
import 'dotenv/config';
```

### Step 2: Key Rotation Strategy
```typescript
// Support multiple keys for rotation
const gamma = new GammaClient({
  apiKey: process.env.GAMMA_API_KEY_PRIMARY
    || process.env.GAMMA_API_KEY_SECONDARY,
});

// Rotation script
async function rotateApiKey() {
  // 1. Generate new key in Gamma dashboard
  // 2. Update GAMMA_API_KEY_SECONDARY
  // 3. Deploy and verify
  // 4. Swap PRIMARY and SECONDARY
  // 5. Revoke old key
}
```

### Step 3: Request Signing (if supported)
```typescript
import crypto from 'crypto';

function signRequest(payload: object, secret: string): string {
  const timestamp = Date.now().toString();
  const message = timestamp + JSON.stringify(payload);

  return crypto
    .createHmac('sha256', secret)
    .update(message)
    .digest('hex');
}

// Usage with webhook verification
function verifyWebhook(body: string, signature: string, secret: string): boolean {
  const expected = crypto
    .createHmac('sha256', secret)
    .update(body)
    .digest('hex');

  return crypto.timingSafeEqual(
    Buffer.from(signature),
    Buffer.from(expected)
  );
}
```

### Step 4: Access Control Patterns
```typescript
// Scoped API keys (if supported)
const readOnlyGamma = new GammaClient({
  apiKey: process.env.GAMMA_API_KEY_READONLY,
  scopes: ['presentations:read', 'exports:read'],
});

const fullAccessGamma = new GammaClient({
  apiKey: process.env.GAMMA_API_KEY_FULL,
});

// Permission check before operations
async function createPresentation(user: User, data: object) {
  if (!user.permissions.includes('gamma:create')) {
    throw new Error('Insufficient permissions');
  }
  return fullAccessGamma.presentations.create(data);
}
```

### Step 5: Audit Logging
```typescript
import { GammaClient } from '@gamma/sdk';

function createAuditedClient(userId: string) {
  return new GammaClient({
    apiKey: process.env.GAMMA_API_KEY,
    interceptors: {
      request: (config) => {
        console.log(JSON.stringify({
          timestamp: new Date().toISOString(),
          userId,
          action: `${config.method} ${config.path}`,
          type: 'gamma_api_request',
        }));
        return config;
      },
    },
  });
}
```

## Security Checklist

- [ ] API keys stored in environment variables
- [ ] .env files in .gitignore
- [ ] No keys in source code or logs
- [ ] Key rotation procedure documented
- [ ] Minimal permission scopes used
- [ ] Audit logging enabled
- [ ] Webhook signatures verified
- [ ] HTTPS enforced for all calls

## Error Handling
| Security Issue | Detection | Remediation |
|----------------|-----------|-------------|
| Exposed key | GitHub scanning | Rotate immediately |
| Key in logs | Log audit | Filter sensitive data |
| Unauthorized access | Audit logs | Revoke and investigate |
| Weak permissions | Access review | Apply least privilege |

## Resources
- [Gamma Security Guide](https://gamma.app/docs/security)
- [API Key Management](https://gamma.app/docs/api-keys)
- [OWASP API Security](https://owasp.org/API-Security/)

## Next Steps
Proceed to `gamma-prod-checklist` for production readiness.