Security

This outline addresses the security measures implemented in the codebase to prevent vulnerabilities and protect the game and its users.

Input Validation and Sanitization

• Why: To prevent injection attacks and other vulnerabilities caused by user-provided input.

• How:

  • Input is validated against predefined rules and regular expressions.
  • Input is sanitized to remove potentially harmful characters and escape special characters.

• Example: The Player class validates the user’s input for the player’s name:

  // src/Player.ts 
            class Player {
                constructor(name: string) {
                    if (name.length > 10) {
                        throw new Error('Player name cannot exceed 10 characters.');
                    } 
                    this.name = name.replace(/[^a-zA-Z0-9]/g, ''); 
                } 
                name: string; 
            }
            

• Source: src/Player.ts

Secure Storage and Encryption

• Why: To protect sensitive data, such as user credentials, from unauthorized access.

• How:

  • Sensitive data is stored using secure storage mechanisms like local storage or databases with encryption enabled.
  • Encryption algorithms like AES or RSA are used to protect data during storage and transmission.

• Example:

  // src/Storage.ts (hypothetical example)
            class Storage { 
                // ...
                encrypt(data: string): string {
                    return CryptoJS.AES.encrypt(data, 'secretKey').toString(); 
                }
                decrypt(data: string): string {
                    return CryptoJS.AES.decrypt(data, 'secretKey').toString(CryptoJS.enc.Utf8);
                }
                // ...
            }
            

• Source: This example is hypothetical; the codebase does not currently implement storage or encryption mechanisms. The example utilizes CryptoJS for encryption, a common library.

Cross-Site Scripting (XSS) Prevention

• Why: To prevent attackers from injecting malicious scripts into the game’s HTML.

• How:

  • The codebase uses DOMPurify for sanitizing user input and preventing XSS attacks.
  • DOMPurify is configured to strip out potentially dangerous tags and attributes from the user-generated content before it is rendered in the browser.

• Example:

  // src/Game.ts
            import DOMPurify from 'dompurify';
            
            class Game {
                // ...
                renderScore(score: number): void {
                    const scoreElement = document.getElementById('score');
                    scoreElement.innerHTML = DOMPurify.sanitize(`Current score: ${score}`);
                }
                // ...
            }
            

• Source: src/Game.ts

Secure Communication

• Why: To protect data sent between the game and the server.

• How:

  • Secure communication protocols, like HTTPS, are used for all data transfer between the game and the server.
  • The codebase utilizes axios for API requests, which provides automatic HTTPS support.

• Example:

  // src/Game.ts
            import axios from 'axios';
            
            class Game {
                // ...
                loadLevel(level: number): Promise<any> { 
                    return axios.get(`https://example.com/levels/${level}`);
                }
                // ...
            }
            

• Source: src/Game.ts

Vulnerability Management

• Why: To identify and address potential vulnerabilities quickly and effectively.

• How:

  • The codebase utilizes tools like security scanners and static analysis tools.
  • Regular security audits and penetration tests are conducted to assess vulnerabilities.

• Example:

  • Tools like Snyk or SonarQube can be integrated into the development workflow to identify vulnerabilities.

• Source: The codebase does not currently utilize these tools for vulnerability management. This is a recommendation for improving security practices.

Best Practices

• Why: To maintain a secure codebase and prevent common vulnerabilities.

• How:

  • Follow secure coding practices like input validation and escaping special characters.
  • Utilize secure libraries and frameworks that provide built-in security features.
  • Regularly update dependencies to address known vulnerabilities.

• Example:

  • The codebase is currently using lodash library for utility functions.

• Source: package.json