Question 1

How to install CPP-JWT with CMake?

Accepted Answer

Use find_package(cpp-jwt) after installation or add_subdirectory for vendoring, then link with target_link_libraries, as detailed in the README's Consuming the library section. You can also use conan or vcpkg for package management.

Question 2

Does CPP-JWT support RS256 algorithm?

Accepted Answer

Yes, it fully supports RS256 along with RS384 and RS512 for RSA-based signing and verification, as confirmed in the Key Features and Support sections of the README.

Question 3

CPP-JWT vs libjwt for C++: which should I use?

Accepted Answer

CPP-JWT offers a more modern C++14 API with dual error handling and parameter-based design, while libjwt is C-based and may be simpler but less type-safe. Choose based on your project's need for modern features versus minimalism.

Question 4

How to handle JWT expiration with CPP-JWT?

Accepted Answer

Use the add_claim API to set the 'exp' claim with a chrono time point, then decode with verify(true) to automatically validate expiration, as shown in the Advanced Examples section for error handling.

Question 5

Can I use CPP-JWT without OpenSSL?

Accepted Answer

No, OpenSSL is mandatory for all cryptographic operations except the 'none' algorithm; the library relies on it for signing and verification, as stated in the External Dependencies.

Question 6

What JSON library does CPP-JWT depend on?

Accepted Answer

It exclusively uses the nlohmann JSON library, and the README notes there's no support for other JSON libraries, which can be a constraint if your project uses a different one.

CPP-JWT

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