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BUSINESS POSTURE

Business Priorities and Goals:

  • Provide a free, open-source, cross-platform game development framework.
  • Maintain a large and active community of developers.
  • Ensure ease of use and rapid development capabilities.
  • Support a wide range of platforms and devices.
  • Enable developers to create high-performance 2D games.
  • Facilitate the creation of games that can be easily monetized.

Business Risks:

  • Malicious actors could exploit vulnerabilities in the framework to compromise games built with it, potentially impacting a large number of users.
  • The open-source nature of the project makes it susceptible to malicious contributions or forks that could harm the reputation and trustworthiness of the framework.
  • Lack of robust security practices could lead to intellectual property theft or unauthorized modification of the framework.
  • Failure to address security concerns could lead to decreased adoption by developers and damage the project's reputation.
  • Inability to secure the build and distribution process could lead to compromised releases.

SECURITY POSTURE

Existing Security Controls:

  • security control: Code reviews are performed, although the consistency and depth may vary (mentioned throughout the repository's contribution guidelines).
  • security control: Community involvement in identifying and reporting issues (implicit in the open-source nature).
  • security control: Use of CMake for build configuration, which can help manage dependencies (described in build documentation).

Accepted Risks:

  • accepted risk: Reliance on community contributions for security improvements and vulnerability identification.
  • accepted risk: Potential for vulnerabilities due to the complexity of the codebase and the wide range of supported platforms.
  • accepted risk: Limited formal security testing and auditing.

Recommended Security Controls:

  • Implement static application security testing (SAST) tools in the CI/CD pipeline.
  • Implement dynamic application security testing (DAST) for runtime vulnerability analysis.
  • Conduct regular security audits and penetration testing.
  • Establish a formal vulnerability disclosure program.
  • Provide security training for core contributors.
  • Implement Software Composition Analysis (SCA) to manage vulnerabilities in third-party dependencies.
  • Use code signing for releases.

Security Requirements:

  • Authentication: Not directly applicable to the framework itself, but guidance should be provided to developers on implementing secure authentication mechanisms in their games.
  • Authorization: Not directly applicable to the framework itself, but guidance should be provided to developers on implementing secure authorization mechanisms in their games.
  • Input Validation: The framework should provide robust input validation mechanisms to prevent common vulnerabilities like buffer overflows and injection attacks. This is crucial for handling user input, file loading, and network communication.
  • Cryptography: The framework should provide secure cryptographic primitives for common tasks like data encryption, hashing, and digital signatures. Guidance should be provided on using these primitives securely.

DESIGN

C4 CONTEXT

graph LR
    User["User/Player"] -- Plays --> Cocos2d_X_Game["Cocos2d-x Game"]
    Cocos2d_X_Game -- Uses --> Cocos2d_X["Cocos2d-x Framework"]
    Cocos2d_X -- Depends on --> Third_Party_Libraries["Third-Party Libraries\n(e.g., OpenGL, Box2D)"]
    Developer["Developer"] -- Develops --> Cocos2d_X_Game
    Developer -- Uses --> Cocos2d_X
    Cocos2d_X -- Interacts with --> Operating_Systems["Operating Systems\n(e.g., iOS, Android, Windows)"]
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Element Descriptions:

  • Element:

    • Name: User/Player
    • Type: Person
    • Description: The end-user who plays games created with Cocos2d-x.
    • Responsibilities: Interacts with the game.
    • Security controls: None directly applicable. Relies on the security of the game and the underlying platform.

  • Element:

    • Name: Cocos2d-x Game
    • Type: Software System
    • Description: A game built using the Cocos2d-x framework.
    • Responsibilities: Provides game logic, rendering, and user interaction.
    • Security controls: Implemented by the game developer, using Cocos2d-x's features and following security best practices.

  • Element:

    • Name: Cocos2d-x Framework
    • Type: Software System
    • Description: The core game development framework.
    • Responsibilities: Provides APIs for graphics, audio, input, physics, and other game development functionalities.
    • Security controls: Input validation, secure use of third-party libraries, secure coding practices (as much as possible within the framework).

  • Element:

    • Name: Third-Party Libraries
    • Type: Software System
    • Description: External libraries used by Cocos2d-x (e.g., OpenGL, Box2D).
    • Responsibilities: Provide specific functionalities like graphics rendering or physics simulation.
    • Security controls: Relies on the security of the individual libraries. Cocos2d-x should use secure versions and configurations.

  • Element:

    • Name: Developer
    • Type: Person
    • Description: The person who creates games using Cocos2d-x.
    • Responsibilities: Develops the game logic, integrates assets, and uses the Cocos2d-x framework.
    • Security controls: Follows secure coding practices, uses secure development tools, and implements appropriate security measures within the game.

  • Element:

    • Name: Operating Systems
    • Type: Software System
    • Description: The underlying operating systems on which the games run (iOS, Android, Windows, etc.).
    • Responsibilities: Provides the platform and environment for the game to execute.
    • Security controls: Relies on the security features of the operating system. Cocos2d-x should be compatible with the security models of supported OSes.

C4 CONTAINER

graph LR
    User["User/Player"] -- Interacts with --> Game["Game Application"]
    Game -- Uses --> Cocos2d_X_Engine["Cocos2d-x Engine\n(C++)"]
    Cocos2d_X_Engine -- Uses --> Graphics_API["Graphics API\n(OpenGL ES)"]
    Cocos2d_X_Engine -- Uses --> Audio_Engine["Audio Engine\n(OpenAL, etc.)"]
    Cocos2d_X_Engine -- Uses --> Physics_Engine["Physics Engine\n(Box2D, Chipmunk)"]
    Cocos2d_X_Engine -- Uses --> Input_Handling["Input Handling"]
    Cocos2d_X_Engine -- Uses --> Platform_Specific_Code["Platform-Specific Code\n(iOS, Android, etc.)"]
    Developer["Developer"] -- Writes Code --> Game
    Developer -- Uses --> Cocos2d_X_Engine
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Element Descriptions:

  • Element:

    • Name: User/Player
    • Type: Person
    • Description: The end-user who plays the game.
    • Responsibilities: Interacts with the game application.
    • Security controls: None directly applicable.

  • Element:

    • Name: Game Application
    • Type: Container (Application)
    • Description: The specific game built using Cocos2d-x.
    • Responsibilities: Implements game logic, user interface, and overall game experience.
    • Security controls: Implemented by the game developer, following secure coding practices and utilizing Cocos2d-x's security features.

  • Element:

    • Name: Cocos2d-x Engine (C++)
    • Type: Container (Library)
    • Description: The core engine of Cocos2d-x, written in C++.
    • Responsibilities: Provides the main framework functionalities for game development.
    • Security controls: Input validation, secure handling of resources, safe memory management.

  • Element:

    • Name: Graphics API (OpenGL ES)
    • Type: Container (Library)
    • Description: The graphics rendering API used by Cocos2d-x.
    • Responsibilities: Handles rendering of 2D and 3D graphics.
    • Security controls: Relies on the security of the OpenGL ES implementation. Cocos2d-x should use it securely.

  • Element:

    • Name: Audio Engine (OpenAL, etc.)
    • Type: Container (Library)
    • Description: The audio engine used for playing sounds and music.
    • Responsibilities: Manages audio playback and effects.
    • Security controls: Relies on the security of the underlying audio engine.

  • Element:

    • Name: Physics Engine (Box2D, Chipmunk)
    • Type: Container (Library)
    • Description: The physics engine used for simulating physics interactions.
    • Responsibilities: Handles collision detection, physics calculations, and object movement.
    • Security controls: Relies on the security of the chosen physics engine.

  • Element:

    • Name: Input Handling
    • Type: Container (Component)
    • Description: Module for handling user input (touch, keyboard, mouse, etc.).
    • Responsibilities: Processes user input events and passes them to the game logic.
    • Security controls: Input validation to prevent injection attacks and other input-related vulnerabilities.

  • Element:

    • Name: Platform-Specific Code (iOS, Android, etc.)
    • Type: Container (Component)
    • Description: Code that interacts directly with the underlying operating system.
    • Responsibilities: Provides platform-specific implementations for certain functionalities.
    • Security controls: Adheres to the security guidelines and best practices of each platform.

  • Element:

    • Name: Developer
    • Type: Person
    • Description: The person developing the game.
    • Responsibilities: Writes the game code and uses the Cocos2d-x engine.
    • Security controls: Follows secure coding practices.

DEPLOYMENT

Possible Deployment Solutions:

  1. Mobile (iOS/Android): Games are packaged as IPA (iOS) or APK (Android) files and distributed through app stores (Apple App Store, Google Play Store) or through ad-hoc distribution methods.
  2. Desktop (Windows/macOS/Linux): Games are packaged as executables or platform-specific installers.
  3. Web (HTML5): Games are compiled to JavaScript and WebAssembly, and deployed to a web server.

Chosen Deployment Solution (Mobile - Android):

graph LR
    Developer_Machine["Developer Machine"] -- APK File --> Google_Play_Store["Google Play Store"]
    Google_Play_Store -- Installs --> Android_Device["Android Device"]
    Android_Device -- Runs --> Cocos2d_X_Game["Cocos2d-x Game"]
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Element Descriptions:

  • Element:

    • Name: Developer Machine
    • Type: Infrastructure Node
    • Description: The computer used by the developer to build and package the game.
    • Responsibilities: Compiles the code, packages assets, and creates the APK file.
    • Security controls: Secure development environment, code signing, secure build process.

  • Element:

    • Name: Google Play Store
    • Type: Infrastructure Node
    • Description: The official app store for Android devices.
    • Responsibilities: Distributes the game to users, handles updates, and provides a platform for discovery.
    • Security controls: Google Play Store's security measures (app scanning, developer verification, etc.).

  • Element:

    • Name: Android Device
    • Type: Infrastructure Node
    • Description: A mobile device running the Android operating system.
    • Responsibilities: Runs the Cocos2d-x game.
    • Security controls: Android operating system security features (sandboxing, permissions, etc.).

  • Element:

    • Name: Cocos2d-x Game
    • Type: Software System
    • Description: The game running on the Android device.
    • Security controls: Implemented by the game developer, following secure coding practices and utilizing Cocos2d-x's security features.

BUILD

graph LR
    Developer["Developer"] -- Commits Code --> Git_Repository["Git Repository\n(GitHub)"]
    Git_Repository -- Triggers --> CI_Server["CI Server\n(GitHub Actions, etc.)"]
    CI_Server -- Runs --> Build_Script["Build Script\n(CMake, etc.)"]
    Build_Script -- Uses --> Compiler["Compiler\n(GCC, Clang, etc.)"]
    Build_Script -- Uses --> Third_Party_Libraries["Third-Party Libraries"]
    Build_Script -- Performs --> SAST["SAST Tools"]
    Build_Script -- Performs --> SCA["SCA Tools"]
    Build_Script -- Generates --> Build_Artifacts["Build Artifacts\n(APK, IPA, Executable)"]
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Build Process Description:

  1. Code Commit: The developer commits code changes to the Git repository (GitHub).
  2. CI Trigger: The commit triggers a build process on a CI server (e.g., GitHub Actions, Jenkins).
  3. Build Script Execution: The CI server executes a build script (e.g., CMake).
  4. Compilation: The build script uses a compiler (e.g., GCC, Clang) to compile the source code.
  5. Dependency Management: The build script manages and links third-party libraries.
  6. Security Analysis:
    • SAST: Static Application Security Testing tools are run to analyze the source code for vulnerabilities.
    • SCA: Software Composition Analysis tools are run to identify vulnerabilities in third-party dependencies.
  7. Artifact Generation: The build script generates the final build artifacts (e.g., APK for Android, IPA for iOS, executable for desktop platforms).

Security Controls in Build Process:

  • Version Control (Git): Tracks code changes and allows for auditing.
  • CI/CD (GitHub Actions, Jenkins): Automates the build process and ensures consistency.
  • SAST Tools: Identify vulnerabilities in the source code.
  • SCA Tools: Identify vulnerabilities in third-party dependencies.
  • Code Signing (Recommended): Ensures the integrity and authenticity of the build artifacts.

RISK ASSESSMENT

Critical Business Processes:

  • Game development and distribution.
  • Community engagement and support.
  • Maintenance and updates of the framework.

Data to Protect:

  • Source Code (Sensitivity: Medium): The framework's source code is publicly available, but unauthorized modifications or malicious forks could harm the project's reputation.
  • Third-Party Library Dependencies (Sensitivity: Medium to High): Vulnerabilities in these dependencies could be exploited in games built with Cocos2d-x.
  • User Data (Sensitivity: Varies): This depends on the specific games built with Cocos2d-x. The framework itself doesn't directly handle user data, but games built with it might. Developers are responsible for securing user data within their games.
  • Build Artifacts (Sensitivity: High): Compromised build artifacts could lead to widespread distribution of malicious code.

QUESTIONS & ASSUMPTIONS

Questions:

  • What is the current level of security awareness among the core contributors and the wider community?
  • Are there any existing security audits or penetration tests that have been performed on Cocos2d-x?
  • What is the process for handling security vulnerabilities reported by the community?
  • Are there any specific platform security requirements that need to be considered (e.g., iOS App Store Review Guidelines)?
  • What is the budget and resource allocation for security improvements?

Assumptions:

  • BUSINESS POSTURE: The project prioritizes being open-source and community-driven.
  • SECURITY POSTURE: There is a basic level of security awareness, but formal security practices are limited.
  • DESIGN: The framework relies heavily on C++ and third-party libraries. The build process is automated to some extent, but security checks may not be comprehensive.