How do I install jwt-cpp with vcpkg?

jwt-cpp is available in vcpkg; you can install it via 'vcpkg install jwt-cpp'. Ensure OpenSSL dependencies are met, and refer to the package's documentation for platform-specific setup.

Can jwt-cpp work with Boost.JSON?

Yes, jwt-cpp supports flexible JSON integration through traits. You can use or create a trait for Boost.JSON by following the instructions in the traits documentation, allowing seamless use.

What's the performance of jwt-cpp compared to other C++ JWT libraries?

jwt-cpp is header-only, which may increase compile times but reduces runtime dependencies. Performance depends on the chosen JSON library and algorithm; it's optimized for flexibility rather than raw speed.

How to validate a JWT with ECDSA in jwt-cpp?

Use the jwt::verify class with ECDSA algorithms like ES256. Load your elliptic curve keys, set the algorithm in the verifier, and verify the decoded token—examples are provided in the repository.

Is jwt-cpp thread-safe for multi-threaded applications?

The library's verifier and creator are stateless, so they can be reused across threads safely. However, you must manage shared resources like key storage and token decoding with proper synchronization.

jwt-cpp vs libjwt: which is better for C++ projects?

jwt-cpp offers a header-only design and flexible JSON integration, making it easier to embed without linking. Libjwt may have more features out-of-the-box but ties you to specific dependencies and JSON libraries.

Open-Awesome

jwt-cpp

MITC++v0.7.2

A header-only C++11 library for creating and validating JSON Web Tokens (JWT) with comprehensive algorithm support.

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1.1k stars306 forks0 contributors

What is jwt-cpp?

jwt-cpp is a header-only C++ library for creating and validating JSON Web Tokens (JWT). It provides a comprehensive implementation of JWT standards, enabling developers to handle authentication and secure data exchange in C++ applications with support for all standard signature algorithms.

Target Audience

C++ developers building applications that require JWT-based authentication, such as web services, APIs, or microservices, especially those needing a lightweight, header-only solution.

Value Proposition

Developers choose jwt-cpp for its header-only design, comprehensive algorithm support, and flexibility in JSON library integration, making it easy to embed into existing C++ projects without external dependencies.

Overview

A header only library for creating and validating json web tokens in c++

Use Cases

Best For

Adding JWT authentication to C++ web servers or APIs
Securing microservices communication with signed tokens
Implementing single sign-on (SSO) in C++ applications
Validating third-party JWT tokens in backend services
Creating signed tokens for mobile or desktop app authentication
Integrating JWT into existing C++ projects with minimal overhead

Not Ideal For

Applications targeting C++98 or earlier standards, as it requires C++11 or later.
Teams needing out-of-the-box authentication frameworks with built-in user management and session handling.
Projects with strict dependency minimization that aim to avoid external libraries like OpenSSL.
Developers unfamiliar with cryptographic concepts who prefer higher-level, abstraction-heavy solutions.

Pros & Cons

Pros

Comprehensive Algorithm Support

Implements all standard JWT signature algorithms including HMAC, RSA, ECDSA, PSS, and EdDSA, as detailed in the README's algorithm table, ensuring versatility for various security needs.

Header-Only Integration

As a header-only library, it eliminates complex build steps, allowing easy inclusion in existing C++ projects without linking against external binaries, simplifying deployment.

Flexible JSON Integration

Uses generic traits to work with any JSON library, avoiding lock-in; the README provides instructions for integrating with custom libraries, enhancing adaptability.

Modular and Extensible

Supports adding custom signature algorithms and base64 implementations, as highlighted in the modular design, enabling tailored solutions for specific requirements.

Cons

OpenSSL Dependency

Requires libcrypto and libssl-dev, which can complicate setup in environments without these libraries or where dependency management is strict, adding overhead.

Steep Learning Curve

Assumes familiarity with JWT standards and cryptographic implementation; the low-level approach and trait-based configuration may deter beginners or those seeking quick integration.

Limited High-Level Features

Focuses solely on JWT creation and validation, lacking built-in support for common authentication flows like token refresh or revocation, requiring additional custom code.

Frequently Asked Questions

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