emarref / jwt
A JWT implementation
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This package is auto-updated.
Last update: 2024-10-23 13:59:00 UTC
README
An implementation of the JSON Web Token (JWT) draft in PHP. See jwt.io for more information on JWT.
Features include:
- Token serialization
- Token deserialization
- Token verification
aud
,exp
,iss
,nbf
,sub
claims are verified
- Symmetric Encryption
NONE
,HS256
,HS384
,HS512
algorithms supported
- Asymmetric Encryption
RS256
,RS384
,RS512
algorithms supportedES256
,ES384
,ES512
,PS256
,PS384
,PS512
algorithms are planned
⚠️ Versions of this library up to and including v1.0.2 are susceptible to timing attacks when using Symmetric encryption. See #20 for more information. Please update to >= v1.0.3 as soon as possible to address this vulnerability.
This library is not susceptible to a common encryption vulnerability.
Installation
composer require emarref/jwt
Usage
Create an instance of the Emarref\Jwt\Token
class, then configure it.
use Emarref\Jwt\Claim; $token = new Emarref\Jwt\Token(); // Standard claims are supported $token->addClaim(new Claim\Audience(['audience_1', 'audience_2'])); $token->addClaim(new Claim\Expiration(new \DateTime('30 minutes'))); $token->addClaim(new Claim\IssuedAt(new \DateTime('now'))); $token->addClaim(new Claim\Issuer('your_issuer')); $token->addClaim(new Claim\JwtId('your_id')); $token->addClaim(new Claim\NotBefore(new \DateTime('now'))); $token->addClaim(new Claim\Subject('your_subject')); // Custom claims are supported $token->addClaim(new Claim\PublicClaim('claim_name', 'claim_value')); $token->addClaim(new Claim\PrivateClaim('claim_name', 'claim_value'));
To use a token, create a JWT instance.
$jwt = new Emarref\Jwt\Jwt();
To retrieve the encoded token for transfer, call the serialize()
method.
$algorithm = new Emarref\Jwt\Algorithm\None(); $encryption = Emarref\Jwt\Encryption\Factory::create($algorithm); $serializedToken = $jwt->serialize($token, $encryption);
The $serializedToken
variable now contains the unencrypted base64 encoded string representation of your token. To encrypt a token, pass an instance of Emarref\Jwt\Encryption\EncryptionInterface
to the serialize()
method as the second argument.
$algorithm = new Emarref\Jwt\Algorithm\Hs256('verysecret'); $encryption = Emarref\Jwt\Encryption\Factory::create($algorithm); $serializedToken = $jwt->serialize($token, $encryption);
An example of using Rs256 encryption with a key pair can be found in the wiki - Using RS256 Encryption.
To use a serialized token, first deserialize it into a Emarref\Jwt\Token
object using a Jwt
instance.
$token = $jwt->deserialize($serializedToken);
To verify a token's claims, first set up the context that should be used to verify the token against. Encryption is the only required verification.
$context = new Emarref\Jwt\Verification\Context($encryption); $context->setAudience('audience_1'); $context->setIssuer('your_issuer');
Then use the verify()
method on a Jwt
instance.
try { $jwt->verify($token, $context); } catch (Emarref\Jwt\Exception\VerificationException $e) { echo $e->getMessage(); }
Testing
This library uses PHPUnit for unit testing. Make sure you've run composer install
then call:
./bin/phpunit ./test