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BUSINESS POSTURE

  • Business Priorities and Goals:
    • Provide a free, open-source, and community-driven game engine.
    • Offer a performant and modular engine for game development.
    • Foster a thriving ecosystem around the Bevy Engine.
    • Enable game developers to create high-quality games efficiently.
    • Promote the Rust programming language in game development.
  • Business Risks:
    • Community trust erosion due to security vulnerabilities in the engine.
    • Negative impact on adoption if the engine is perceived as unstable or insecure.
    • Reputational damage if games built with Bevy are easily exploitable.
    • Risk of malicious contributions to the open-source project compromising the engine.
    • Dependence on volunteer contributors and maintainers for security upkeep.

SECURITY POSTURE

  • Existing Security Controls:

    • security control: Code reviews are conducted by maintainers for pull requests (described in GitHub repository contribution guidelines).
    • security control: Automated testing is in place, including unit and integration tests (evident from GitHub Actions workflows).
    • security control: Dependency management using Cargo, Rust's package manager, which includes vulnerability scanning (crates.io and Cargo features).
    • security control: Open-source nature of the project allows for community security audits and vulnerability reporting (implicit in open-source model).
    • accepted risk: Reliance on community contributions, which may introduce vulnerabilities.
    • accepted risk: Limited resources dedicated specifically to dedicated security audits.
    • accepted risk: Potential vulnerabilities in third-party dependencies.

  • Recommended Security Controls:

    • security control: Implement static application security testing (SAST) tools in the CI/CD pipeline to automatically detect potential vulnerabilities in code changes.
    • security control: Introduce dependency scanning tools that specifically check for known vulnerabilities in dependencies and alert maintainers.
    • security control: Establish a clear vulnerability reporting and response process, including a security policy and contact information.
    • security control: Conduct periodic security audits, potentially engaging external security experts, especially before major releases.
    • security control: Implement fuzz testing to identify potential crash bugs and vulnerabilities in input handling and parsing.

  • Security Requirements:

    • Authentication:
      • Requirement: No direct user authentication is required within the Bevy Engine itself, as it is a development library.
      • Requirement: Authentication is relevant for contributors to the project via GitHub accounts.
    • Authorization:
      • Requirement: Authorization is managed by GitHub's role-based access control for repository contributors and maintainers.
      • Requirement: Within the engine, ensure proper authorization mechanisms are in place if features are added that require access control (currently not a primary concern for a game engine library).
    • Input Validation:
      • Requirement: Implement robust input validation for all external data sources processed by the engine, such as asset files, configuration files, and network inputs (if networking features are added).
      • Requirement: Sanitize user-provided data within game code examples and tutorials to prevent common vulnerabilities like cross-site scripting (XSS) if web-based demos are provided.
    • Cryptography:
      • Requirement: Use cryptography appropriately for features that require it, such as secure networking (if implemented) or secure storage of sensitive game data (though this is typically the game developer's responsibility, the engine should provide secure primitives if needed).
      • Requirement: Ensure proper handling of cryptographic keys and avoid hardcoding secrets in the engine's codebase.

DESIGN

C4 Context

flowchart LR
    subgraph "Game Developers"
        GD[/"Game Developer"/]
    end
    subgraph "End Users"
        EU[/"End User"/]
    end
    center_node[/"Bevy Engine"/]
    subgraph "Development Tools"
        RustC[/"Rust Compiler"/]
        Cargo[/"Cargo Package Manager"/]
        IDE[/"Integrated Development Environment"/]
        Git[/"Git Version Control"/]
    end
    subgraph "Ecosystem"
        CratesIO[/"Crates.io"/]
        GitHub[/"GitHub"/]
        OS[/"Operating Systems (Windows, Linux, macOS, Web)"/]
        GraphicsDrivers[/"Graphics Drivers (Vulkan, WebGPU, OpenGL)"/]
    end

    GD --> RustC
    GD --> Cargo
    GD --> IDE
    GD --> Git
    GD --> center_node
    center_node --> RustC
    center_node --> Cargo
    center_node --> CratesIO
    center_node --> GitHub
    center_node --> OS
    center_node --> GraphicsDrivers
    center_node --> EU

    linkStyle 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 stroke:#333,stroke-width:2px;
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  • Context Diagram Elements:
      • Name: Game Developer
      • Type: Person
      • Description: Software developers who use Bevy Engine to create games and interactive applications.
      • Responsibilities: Develop games using Bevy Engine, contribute to the engine's development, report issues, and participate in the community.
      • Security controls: Responsible for secure game development practices, including input validation, secure asset handling, and protecting game data.
      • Name: End User
      • Type: Person
      • Description: Players who run and interact with games built using Bevy Engine.
      • Responsibilities: Play games, provide feedback to game developers.
      • Security controls: Relies on game developers and Bevy Engine to provide secure and stable games. Security controls are primarily on the game developer and engine side.
      • Name: Bevy Engine
      • Type: Software System
      • Description: A data-driven game engine built in Rust, providing a framework and tools for game development.
      • Responsibilities: Provide core engine functionalities, rendering capabilities, asset management, input handling, and a plugin system. Ensure engine stability, performance, and security.
      • Security controls: Code reviews, automated testing, dependency management, vulnerability scanning, and community security audits.
      • Name: Rust Compiler (RustC)
      • Type: Software System
      • Description: The Rust programming language compiler, used to compile Bevy Engine and games built with it.
      • Responsibilities: Compile Rust code into executable binaries. Ensure compiler security and stability.
      • Security controls: Compiler security is maintained by the Rust project. Bevy Engine relies on the security of the Rust compiler.
      • Name: Cargo Package Manager
      • Type: Software System
      • Description: Rust's package manager and build tool, used to manage dependencies and build Bevy Engine and games.
      • Responsibilities: Dependency management, build automation, package publishing. Ensure secure dependency resolution and build processes.
      • Security controls: Cargo's built-in security features, such as checksum verification and vulnerability scanning of dependencies.
      • Name: Integrated Development Environment (IDE)
      • Type: Software System
      • Description: Software applications used by game developers to write, debug, and manage Bevy Engine projects (e.g., VS Code, IntelliJ IDEA).
      • Responsibilities: Provide a development environment for game developers. IDE security is the responsibility of the IDE provider.
      • Security controls: IDE security features, such as plugin security and code scanning. Bevy Engine development relies on the security of the chosen IDEs.
      • Name: Git Version Control
      • Type: Software System
      • Description: Distributed version control system used to manage the Bevy Engine source code and game projects.
      • Responsibilities: Source code management, version tracking, collaboration. Ensure repository integrity and access control.
      • Security controls: Git's built-in security features, such as commit signing and access control. GitHub provides platform-level security for Git repositories.
      • Name: Crates.io
      • Type: Software System
      • Description: The official package registry for Rust crates, used to distribute Bevy Engine crates and dependencies.
      • Responsibilities: Host and distribute Rust crates. Ensure crate integrity and security.
      • Security controls: Crates.io's security measures, such as crate verification and malware scanning. Bevy Engine relies on the security of Crates.io for dependency distribution.
      • Name: GitHub
      • Type: Software System
      • Description: Web-based platform for version control and collaboration, hosting the Bevy Engine repository and issue tracking.
      • Responsibilities: Host the Bevy Engine source code, manage issues and pull requests, facilitate community collaboration. Ensure platform security and access control.
      • Security controls: GitHub's platform-level security controls, including access control, authentication, and security scanning.
      • Name: Operating Systems (Windows, Linux, macOS, Web)
      • Type: Software System
      • Description: Operating systems on which Bevy Engine and games built with it run.
      • Responsibilities: Provide a runtime environment for applications. OS security is the responsibility of the OS vendor.
      • Security controls: Operating system security features, such as sandboxing, process isolation, and access control. Bevy Engine relies on the security of the underlying operating systems.
      • Name: Graphics Drivers (Vulkan, WebGPU, OpenGL)
      • Type: Software System
      • Description: Software that allows Bevy Engine to communicate with graphics hardware.
      • Responsibilities: Provide an interface to graphics hardware. Driver security and stability are the responsibility of the driver vendor.
      • Security controls: Graphics driver security is maintained by driver vendors. Bevy Engine relies on the security of graphics drivers for rendering.

C4 Container

flowchart LR
    subgraph "Bevy Engine System"
        subgraph "Core Engine"
            Core[/"Bevy Core Crate"/]
            App[/"Bevy App Crate"/]
            ECS[/"Bevy ECS Crate"/]
            Reflect[/"Bevy Reflect Crate"/]
            TypeRegistry[/"Bevy TypeRegistry Crate"/]
        end
        subgraph "Rendering Engine"
            Render[/"Bevy Render Crate"/]
            Wgpu[/"Bevy Wgpu Crate"/]
            Asset[/"Bevy Asset Crate"/]
            Scene[/"Bevy Scene Crate"/]
            Sprite[/"Bevy Sprite Crate"/]
            Text[/"Bevy Text Crate"/]
            UI[/"Bevy UI Crate"/]
            Pbr[/"Bevy PBR Crate"/]
            Gltf[/"Bevy GLTF Crate"/]
        end
        subgraph "Input & Windowing"
            Input[/"Bevy Input Crate"/]
            Window[/"Bevy Window Crate"/]
            Winit[/"Bevy Winit Crate"/]
        end
        subgraph "Audio & Networking (Optional)"
            Audio[/"Bevy Audio Crate"/]
            Networking[/"Bevy Networking Crate"/(Optional)/]
        end
        Plugins[/"Bevy Plugins"/]
        Examples[/"Bevy Examples"/]
        Documentation[/"Bevy Documentation"/]
    end

    GameDeveloper[/"Game Developer"/] --> Core
    GameDeveloper --> Render
    GameDeveloper --> Input
    GameDeveloper --> Audio
    GameDeveloper --> Plugins
    GameDeveloper --> Examples
    GameDeveloper --> Documentation

    Core --> App
    Core --> ECS
    Core --> Reflect
    Core --> TypeRegistry

    Render --> Wgpu
    Render --> Asset
    Render --> Scene
    Render --> Sprite
    Render --> Text
    Render --> UI
    Render --> Pbr
    Render --> Gltf

    Input --> Window
    Window --> Winit

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  • Container Diagram Elements:
      • Name: Bevy Core Crate
      • Type: Library
      • Description: Provides the foundational components of the engine, including the App runner, ECS (Entity Component System) core, reflection, and type registry.
      • Responsibilities: Manages application lifecycle, provides the ECS framework for game logic, enables reflection for dynamic behavior, and handles type registration for serialization and runtime type information.
      • Security controls: Memory safety provided by Rust, code reviews, automated testing.
      • Name: Bevy App Crate
      • Type: Library
      • Description: Provides the application building blocks and plugin system for Bevy Engine.
      • Responsibilities: Defines the application structure, manages plugins, and provides the main loop and event handling.
      • Security controls: Plugin isolation (to some extent via Rust modules), code reviews, automated testing.
      • Name: Bevy ECS Crate
      • Type: Library
      • Description: Implements the Entity Component System architecture, a core pattern in Bevy for managing game entities and logic.
      • Responsibilities: Provides the ECS framework for creating and managing entities, components, and systems.
      • Security controls: Memory safety provided by Rust, system isolation (to some extent), code reviews, automated testing.
      • Name: Bevy Reflect Crate
      • Type: Library
      • Description: Provides reflection capabilities for Rust types, allowing for runtime inspection and manipulation of data.
      • Responsibilities: Enables serialization, deserialization, and dynamic access to data within the engine.
      • Security controls: Type safety provided by Rust, careful handling of reflected data, code reviews, automated testing.
      • Name: Bevy TypeRegistry Crate
      • Type: Library
      • Description: Manages the registration of types used within the engine, crucial for reflection and serialization.
      • Responsibilities: Provides a central registry for types, enabling runtime type lookup and management.
      • Security controls: Type safety provided by Rust, registry integrity, code reviews, automated testing.
      • Name: Bevy Render Crate
      • Type: Library
      • Description: Handles the rendering pipeline of Bevy Engine, from scene graph management to rendering commands.
      • Responsibilities: Manages the rendering process, scene graph, camera system, and rendering resources.
      • Security controls: Vulkan/WebGPU API usage (security of underlying graphics APIs), shader compilation and execution (potential shader vulnerabilities), asset loading and handling (potential for malicious assets), code reviews, automated testing.
      • Name: Bevy Wgpu Crate
      • Type: Library
      • Description: Provides a backend for Bevy Render using the wgpu graphics library, supporting Vulkan, WebGPU, and OpenGL.
      • Responsibilities: Interface with the wgpu library to perform rendering operations on different graphics APIs.
      • Security controls: Reliance on wgpu library security, careful handling of graphics API calls, code reviews, automated testing.
      • Name: Bevy Asset Crate
      • Type: Library
      • Description: Manages asset loading, caching, and hot-reloading in Bevy Engine.
      • Responsibilities: Loads assets from various sources, manages asset lifecycle, and provides hot-reloading capabilities.
      • Security controls: Asset validation (file format checks, size limits), protection against path traversal vulnerabilities, handling of untrusted asset sources, code reviews, automated testing.
      • Name: Bevy Scene Crate
      • Type: Library
      • Description: Handles scene management and serialization in Bevy Engine.
      • Responsibilities: Loads, saves, and manages game scenes, including entity hierarchies and component data.
      • Security controls: Scene file format validation, protection against malicious scene files, secure scene serialization/deserialization, code reviews, automated testing.
      • Name: Bevy Sprite Crate
      • Type: Library
      • Description: Provides 2D sprite rendering capabilities in Bevy Engine.
      • Responsibilities: Renders 2D sprites, manages sprite sheets and animations.
      • Security controls: Image loading and handling (potential image format vulnerabilities), sprite rendering pipeline security, code reviews, automated testing.
      • Name: Bevy Text Crate
      • Type: Library
      • Description: Handles text rendering in Bevy Engine.
      • Responsibilities: Renders text using various fonts and styles.
      • Security controls: Font loading and handling (potential font format vulnerabilities), text rendering pipeline security, protection against text-based injection attacks (if applicable), code reviews, automated testing.
      • Name: Bevy UI Crate
      • Type: Library
      • Description: Provides a user interface system for Bevy Engine.
      • Responsibilities: Manages UI elements, layout, and event handling.
      • Security controls: UI input handling (protection against UI-based exploits), UI rendering pipeline security, code reviews, automated testing.
      • Name: Bevy PBR Crate
      • Type: Library
      • Description: Implements physically based rendering (PBR) for 3D models in Bevy Engine.
      • Responsibilities: Renders 3D models with PBR materials, handles lighting and shading.
      • Security controls: Shader code security, PBR rendering pipeline security, code reviews, automated testing.
      • Name: Bevy GLTF Crate
      • Type: Library
      • Description: Loads and renders glTF (GL Transmission Format) 3D models in Bevy Engine.
      • Responsibilities: Parses and loads glTF files, integrates glTF models into the rendering pipeline.
      • Security controls: glTF file format validation (protection against malicious glTF files), glTF parsing security, asset loading security, code reviews, automated testing.
      • Name: Bevy Input Crate
      • Type: Library
      • Description: Handles user input events, such as keyboard, mouse, and gamepad input.
      • Responsibilities: Captures and processes input events, provides input mapping and actions.
      • Security controls: Input sanitization (protection against input injection attacks, though less relevant for local input), input event handling security, code reviews, automated testing.
      • Name: Bevy Window Crate
      • Type: Library
      • Description: Manages window creation, events, and window properties in Bevy Engine.
      • Responsibilities: Creates and manages application windows, handles window events, and provides window configuration options.
      • Security controls: Window system API usage (security of underlying windowing system), window event handling security, code reviews, automated testing.
      • Name: Bevy Winit Crate
      • Type: Library
      • Description: Provides a backend for Bevy Window using the winit windowing library.
      • Responsibilities: Interface with the winit library to create and manage windows across different platforms.
      • Security controls: Reliance on winit library security, careful handling of window system API calls, code reviews, automated testing.
      • Name: Bevy Audio Crate
      • Type: Library
      • Description: Handles audio playback and management in Bevy Engine.
      • Responsibilities: Plays audio files, manages audio sources and listeners, provides audio effects.
      • Security controls: Audio file format validation (protection against malicious audio files), audio playback pipeline security, code reviews, automated testing.
      • Name: Bevy Networking Crate (Optional)
      • Type: Library
      • Description: (Optional) Provides networking capabilities for Bevy Engine (if implemented).
      • Responsibilities: Handles network communication, provides networking protocols and APIs.
      • Security controls: Network protocol security (if implemented), secure communication channels (TLS/SSL if applicable), input validation for network data, protection against network-based attacks, code reviews, automated testing.
      • Name: Bevy Plugins
      • Type: Collection
      • Description: A collection of official and community-contributed plugins that extend Bevy Engine's functionality.
      • Responsibilities: Provide additional features and integrations for Bevy Engine. Plugin security depends on individual plugin implementations.
      • Security controls: Plugin review process (community-driven, maintainer review), plugin isolation (to some extent), encourage secure plugin development practices.
      • Name: Bevy Examples
      • Type: Application
      • Description: A collection of example games and applications built with Bevy Engine, demonstrating engine features and usage.
      • Responsibilities: Showcase engine capabilities, provide learning resources for developers. Example security is primarily for demonstration purposes, but should avoid obvious vulnerabilities.
      • Security controls: Code reviews for examples, avoid including intentionally vulnerable code, provide disclaimers about example code security.
      • Name: Bevy Documentation
      • Type: Documentation
      • Description: Official documentation for Bevy Engine, including tutorials, API reference, and guides.
      • Responsibilities: Provide comprehensive and accurate documentation for engine users. Documentation security is about preventing malicious content injection.
      • Security controls: Documentation hosting platform security, content review process, protection against content injection attacks (if applicable).

DEPLOYMENT

Bevy Engine itself is not "deployed" in the traditional sense of a web application or service. Instead, it is a library that game developers use to build their games. The "deployment" context here refers to how games built with Bevy Engine are deployed to end-users.

Deployment Options for Games Built with Bevy:

  1. Native Desktop Applications (Windows, macOS, Linux): Games are compiled into platform-specific executables and distributed directly to users (e.g., via game stores, direct download).
  2. Web Applications (WebAssembly): Games are compiled to WebAssembly and deployed as web applications, playable in web browsers.
  3. Mobile Applications (Android, iOS): (Less common currently, but potentially future target) Games could be compiled for mobile platforms and deployed via app stores.

Detailed Deployment Architecture (Native Desktop Application - Example):

flowchart LR
    subgraph "Developer Environment"
        GameCode[/"Game Code (Rust)"/]
        BevyEngineLib[/"Bevy Engine Libraries"/]
        Assets[/"Game Assets"/]
        RustCompiler[/"Rust Compiler"/]
    end
    subgraph "Build Process"
        ExecutableBuilder[/"Executable Builder (Cargo)"/]
    end
    subgraph "Target Environment (End User)"
        OperatingSystem[/"Operating System (Windows, macOS, Linux)"/]
        GraphicsHardware[/"Graphics Hardware"/]
        GameExecutable[/"Game Executable"/]
        GameAssetsDeployed[/"Game Assets"/]
    end

    GameCode --> BevyEngineLib
    GameCode --> Assets
    RustCompiler --> ExecutableBuilder
    BevyEngineLib --> ExecutableBuilder
    Assets --> ExecutableBuilder
    ExecutableBuilder --> GameExecutable
    Assets --> GameAssetsDeployed
    GameExecutable --> OperatingSystem
    GameExecutable --> GraphicsHardware
    GameAssetsDeployed --> OperatingSystem

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  • Deployment Diagram Elements:
      • Name: Game Code (Rust)
      • Type: Code
      • Description: The game-specific Rust code developed by the game developer, utilizing Bevy Engine libraries.
      • Responsibilities: Implements game logic, scenes, and assets. Game developers are responsible for the security of their game code.
      • Security controls: Secure coding practices by game developers, input validation, secure asset handling within game code.
      • Name: Bevy Engine Libraries
      • Type: Libraries
      • Description: The compiled Bevy Engine libraries used by the game code.
      • Responsibilities: Provide engine functionalities to the game code. Security is managed during the Bevy Engine development and build process.
      • Security controls: Security controls implemented within Bevy Engine libraries (as described in Container section).
      • Name: Game Assets
      • Type: Data Files
      • Description: Game assets such as images, models, audio files, and configuration files.
      • Responsibilities: Provide game content. Game developers are responsible for managing and securing their game assets.
      • Security controls: Asset validation during loading, protection against malicious assets, secure asset storage and distribution.
      • Name: Rust Compiler
      • Type: Tool
      • Description: The Rust compiler used to compile the game code and Bevy Engine libraries.
      • Responsibilities: Compile Rust code into executable binaries. Compiler security is maintained by the Rust project.
      • Security controls: Compiler security is maintained by the Rust project.
      • Name: Executable Builder (Cargo)
      • Type: Tool
      • Description: Cargo, the Rust package manager and build tool, used to build the game executable.
      • Responsibilities: Build automation, dependency management, linking game code and Bevy Engine libraries. Cargo's build process security is important.
      • Security controls: Cargo's built-in security features, secure dependency resolution, build process integrity.
      • Name: Game Executable
      • Type: Executable
      • Description: The compiled game executable, ready to be run on the target operating system.
      • Responsibilities: Run the game logic and rendering on the end-user's system. Game executable security depends on the security of game code and Bevy Engine.
      • Security controls: Code signing (optional, for distribution platforms), protection against reverse engineering (obfuscation, anti-tampering - typically game developer responsibility).
      • Name: Game Assets Deployed
      • Type: Data Files
      • Description: Game assets packaged and deployed with the game executable.
      • Responsibilities: Provide game content to the running game. Asset security is important to prevent tampering or malicious assets.
      • Security controls: Asset integrity checks (checksums, signatures - typically game developer responsibility), asset encryption (if sensitive data).
      • Name: Operating System (Windows, macOS, Linux)
      • Type: Environment
      • Description: The operating system on which the game executable runs.
      • Responsibilities: Provide a runtime environment for the game. OS security is the responsibility of the OS vendor.
      • Security controls: Operating system security features (sandboxing, process isolation, access control).
      • Name: Graphics Hardware
      • Type: Hardware
      • Description: The graphics processing unit (GPU) used to render the game.
      • Responsibilities: Perform graphics rendering operations. Graphics hardware security and driver security are important for game execution.
      • Security controls: Graphics driver security, hardware security features (limited scope for game developers).

BUILD

Bevy Engine's build process is automated using GitHub Actions for continuous integration.

Build Process Diagram:

flowchart LR
    subgraph "Developer"
        DeveloperPC[/"Developer PC"/]
        DeveloperCodeChanges[/"Code Changes"/]
    end
    subgraph "GitHub"
        GitHubRepo[/"GitHub Repository"/]
        GitHubActions[/"GitHub Actions CI"/]
        BuildArtifacts[/"Build Artifacts"/]
    end
    subgraph "Crates.io"
        CratesIOregistry[/"Crates.io Registry"/]
    end

    DeveloperPC --> DeveloperCodeChanges
    DeveloperCodeChanges --> GitHubRepo
    GitHubRepo --> GitHubActions
    GitHubActions --> BuildArtifacts
    BuildArtifacts --> CratesIOregistry

    subgraph "Build Artifacts Details"
        Crates[/"Rust Crates (.crate files)"/]
        DocumentationBuild[/"Documentation (HTML)"/]
        ExamplesBuild[/"Example Binaries"/]
    end
    BuildArtifacts --> Crates
    BuildArtifacts --> DocumentationBuild
    BuildArtifacts --> ExamplesBuild

    subgraph "GitHub Actions CI Steps"
        CheckoutCode[/"Checkout Code"/]
        RunTests[/"Run Tests"/]
        RunLinters[/"Run Linters"/]
        RunSAST[/"Run SAST Scanners"/]
        BuildCrates[/"Build Crates"/]
        PublishCrates[/"Publish Crates (Crates.io)"/]
        BuildDocumentation[/"Build Documentation"/]
        PublishDocumentation[/"Publish Documentation (GitHub Pages)"/]
        BuildExamples[/"Build Examples"/]
    end
    GitHubActions --> CheckoutCode
    CheckoutCode --> RunTests
    RunTests --> RunLinters
    RunLinters --> RunSAST
    RunSAST --> BuildCrates
    BuildCrates --> PublishCrates
    BuildCrates --> BuildDocumentation
    BuildDocumentation --> PublishDocumentation
    BuildCrates --> BuildExamples

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  • Build Diagram Elements:
      • Name: Developer PC
      • Type: Environment
      • Description: The local development machine used by Bevy Engine developers.
      • Responsibilities: Code development, local testing, committing code changes. Developer PC security is the responsibility of the developer.
      • Security controls: Developer workstation security practices, code editor security, local development environment security.
      • Name: Developer Code Changes
      • Type: Code
      • Description: Code modifications made by developers.
      • Responsibilities: Implementing new features, bug fixes, security patches. Code change security relies on developer secure coding practices and code review.
      • Security controls: Secure coding practices, code reviews, developer training on security.
      • Name: GitHub Repository
      • Type: Repository
      • Description: The central Git repository hosted on GitHub, storing the Bevy Engine source code.
      • Responsibilities: Source code management, version control, collaboration. GitHub repository security is managed by GitHub and project maintainers.
      • Security controls: GitHub's platform security, access control, branch protection, pull request reviews, commit signing (optional).
      • Name: GitHub Actions CI
      • Type: CI/CD System
      • Description: GitHub's built-in CI/CD service, used to automate the Bevy Engine build, test, and release process.
      • Responsibilities: Automated build, testing, linting, security scanning, and publishing of Bevy Engine. GitHub Actions security is crucial for supply chain security.
      • Security controls: Secure CI/CD pipeline configuration, secret management in CI/CD, dependency scanning in CI/CD, SAST scanning in CI/CD, access control to CI/CD workflows.
      • Name: Build Artifacts
      • Type: Files
      • Description: The output of the build process, including Rust crates, documentation, and example binaries.
      • Responsibilities: Distributable packages of Bevy Engine. Build artifact integrity is important for preventing supply chain attacks.
      • Security controls: Artifact signing (crates.io handles crate signing), checksum generation, secure artifact storage.
      • Name: Crates.io Registry
      • Type: Package Registry
      • Description: The official Rust package registry, used to host and distribute Bevy Engine crates.
      • Responsibilities: Crate hosting and distribution, crate verification. Crates.io security is crucial for the Rust ecosystem.
      • Security controls: Crates.io's platform security, crate verification, malware scanning, crate signing.
      • Name: Checkout Code
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to retrieve the source code from the GitHub repository.
      • Responsibilities: Obtain the latest code for building. Ensure secure code retrieval from the repository.
      • Security controls: GitHub Actions secure checkout process, access control to the repository.
      • Name: Run Tests
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to execute automated tests (unit, integration, etc.).
      • Responsibilities: Verify code correctness and functionality. Identify potential bugs and regressions.
      • Security controls: Comprehensive test suite, test environment security, prevent malicious tests from compromising the build process.
      • Name: Run Linters
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to run code linters and style checkers.
      • Responsibilities: Enforce code quality and style guidelines. Identify potential code quality issues.
      • Security controls: Use of secure and up-to-date linters, configuration of linters to detect security-related code patterns.
      • Name: Run SAST Scanners
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to run Static Application Security Testing (SAST) tools.
      • Responsibilities: Automatically detect potential security vulnerabilities in the source code.
      • Security controls: Integration of SAST tools into the CI pipeline, configuration of SAST tools to detect relevant vulnerability types, regular updates of SAST tools.
      • Name: Build Crates
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to compile the Rust crates of Bevy Engine using Cargo.
      • Responsibilities: Compile the engine code into distributable crates. Ensure secure build process and dependency resolution.
      • Security controls: Secure build environment, Cargo's built-in security features, dependency scanning during build, reproducible builds (desirable).
      • Name: Publish Crates (Crates.io)
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to publish the built Rust crates to Crates.io.
      • Responsibilities: Distribute Bevy Engine crates to the Rust ecosystem. Ensure secure publishing process and crate integrity.
      • Security controls: Secure credentials management for Crates.io publishing, crate signing by Crates.io, verification of published crates.
      • Name: Build Documentation
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to build the Bevy Engine documentation from the source code.
      • Responsibilities: Generate up-to-date documentation for the engine. Ensure documentation build process security.
      • Security controls: Secure documentation build tools, prevent injection of malicious content into documentation.
      • Name: Publish Documentation (GitHub Pages)
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to publish the built documentation to GitHub Pages.
      • Responsibilities: Host and serve the Bevy Engine documentation. Ensure secure documentation hosting.
      • Security controls: GitHub Pages platform security, access control to documentation publishing, content security of documentation website.
      • Name: Build Examples
      • Type: CI Step
      • Description: Step in GitHub Actions workflow to build example games and applications.
      • Responsibilities: Compile example code to demonstrate engine features. Ensure example build process security.
      • Security controls: Secure build environment for examples, avoid including intentionally vulnerable code in examples.

RISK ASSESSMENT

  • Critical Business Processes to Protect:
    • Maintaining the integrity and security of the Bevy Engine codebase.
    • Ensuring the availability and reliability of Bevy Engine crates on Crates.io.
    • Preserving community trust in the Bevy Engine project.
    • Protecting the reputation of the Bevy Engine as a secure and stable game engine.
  • Data to Protect and Sensitivity:
    • Source Code: Highly sensitive. Confidentiality and integrity are critical to prevent unauthorized access, modification, or leakage of engine source code.
    • Build Artifacts (Crates, Documentation, Examples): Sensitive. Integrity is crucial to prevent supply chain attacks and ensure users download and use genuine, untampered artifacts.
    • Community Data (Issues, Discussions, Contributions): Moderately sensitive. Integrity and availability are important for maintaining a healthy and collaborative community.
    • User Game Projects: Low sensitivity from Bevy Engine's perspective (game developers are responsible for their own project data). However, vulnerabilities in Bevy could indirectly impact the security of user projects.

QUESTIONS & ASSUMPTIONS

  • Questions:
    • What is the target risk appetite for the Bevy Engine project? (e.g., startup vs. Fortune 500 context).
    • Are there any specific compliance requirements or security standards that Bevy Engine needs to adhere to?
    • Are there any known past security incidents or vulnerabilities related to Bevy Engine or similar game engines that should be considered?
    • What is the process for handling vulnerability reports from the community?
    • Is there a dedicated security team or individual responsible for security within the Bevy Engine project?
  • Assumptions:
    • BUSINESS POSTURE: The primary business goal is to provide a secure and reliable open-source game engine to the community. Security is important for adoption and community trust.
    • SECURITY POSTURE: Current security controls are primarily based on standard open-source development practices (code reviews, testing). There is room for improvement in proactive security measures like SAST and dependency scanning.
    • DESIGN: The design is modular and crate-based, which allows for some level of isolation between components. The build process is automated using GitHub Actions, providing a good foundation for implementing CI/CD security controls.
    • The threat model will primarily focus on risks related to code vulnerabilities, supply chain security, and community contributions, rather than traditional application security concerns like user data protection or authentication within the engine itself.