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Json Web Tokens for Unreal Engine 4/5

EasyJwt subsystem

EasyJwt is a JSON web tokens engine sub-system for Unreal Engine 4/5, that provides a c++ and bluprint interface to Generate, Sign, Verify and manage claims of JWT.

Supported Platforms

• Windows x86_64
• Hololens 2 (Windows ARM64)
• Linux x86_64
• Linux ARM64

C++ Modules Link

Link the plugin modules to your project through <YourModule>.build.cs:

bEnableExceptions = true;//we are using exceptions

 PrivateDependencyModuleNames.AddRange( new string[]
{
    "EasyJwt",
    "JwtCpp",
    "JwtVerifier",
    "JwtGenerator"
});

JWT Generator Basic Usage

C++

Initialize the Generator

#include "EasyJwtSubsystem.h"

TSharedPtr<FEasyJwtModule> EasyJwt = GEngine->GetEngineSubsystem<UEasyJwtSubsystem>()->GetEasyJwt();
EasyJwt->GetGenerator()->InitGenerator(`<SIGNING_KEY>`, EGeneratorAlgorithm::HS256);

Generate Signed Token Basic Example:

#include "EasyJwtSubsystem.h"

TSharedPtr<FEasyJwtModule> EasyJwt = GEngine->GetEngineSubsystem<UEasyJwtSubsystem>()->GetEasyJwt();

TMap<FString, FString> Claims =
{
	{"Claim1","34235"},
	{"Claim2","dfgds"}
};

TMap<FString, FString> HeaderClaims =
{
	{"HeaderClaim1","345343"},
	{"HeaderClaim2","jhgfdrtt"}
};
/*
Valid since generating it and for 900sec with the givem claims.
*/
FString JwtToken = EasyJwt->GetGenerator()->GenerateJwtToken(true, 0, 900, Claims, HeaderClaims);

Blueprint

Initialize the Generator

Generate Signed Toker

Blueprint API

JWT Verifier Basic Usage

C++

Initialize the Verifier

#include "EasyJwtSubsystem.h"

TSharedPtr<FEasyJwtModule> EasyJwt = GEngine->GetEngineSubsystem<UEasyJwtSubsystem>()->GetEasyJwt();

EasyJwt->GetVerifier()->InitVerifier(`<SIGNING_KEY>`, EVerifierAlgorithm::HS256);

Verify a Token

#include "EasyJwtSubsystem.h"

TSharedPtr<FEasyJwtModule> EasyJwt = GEngine->GetEngineSubsystem<UEasyJwtSubsystem>()->GetEasyJwt();

bool bValid = EasyJwt->GetVerifier()->VerifyJWT(`<TOKEN_TO_VERIFY>`);

Get Claims From JWT

#include "EasyJwtSubsystem.h"

TSharedPtr<FEasyJwtModule> EasyJwt = GEngine->GetEngineSubsystem<UEasyJwtSubsystem>()->GetEasyJwt();

TMap<FString, FString> Claims = EasyJwt->GetVerifier()->GetClaims(`<JWT>`);

Blueprint

Initialize the Verifier

Verify a Token

Extract Claims From a JWT

Blueprint API

Supported Algorithms

• HS256
• HS348
• HS512
• RS256
• RS384
• RS512

More to come soon!!

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