In order to simplify the setup of the library, we provide the class Lcobucci\JWT\Configuration
.
It's meant for:
- Configuring the default algorithm (signer) and key(s) to be used
- Configuring the default set of validation constraints
- Providing custom implementation for the extension points
- Retrieving components (encoder, decoder, parser, validator, and builder)
In order to use it, you must:
- Initialise the configuration object
- Customise the configuration object
- Retrieve components
The Lcobucci\JWT\Signer\Key\InMemory
object is used for symmetric/asymmetric signature.
To initialise it, you can pass the key content as a plain text:
use Lcobucci\JWT\Signer\Key\InMemory;
$key = InMemory::plainText('my-key-as-plaintext');
Provide a base64 encoded string:
use Lcobucci\JWT\Signer\Key\InMemory;
$key = InMemory::base64Encoded('YSB2ZXJ5IGxvbmcgYSB2ZXJ5IHVsdHJhIHNlY3VyZSBrZXkgZm9yIG15IGFtYXppbmcgdG9rZW5z');
Or provide a file path:
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\Key\LocalFileReference;
$key = InMemory::file(__DIR__ . '/path-to-my-key-stored-in-a-file.pem'); // this reads the file and keeps its contents in memory
$key = LocalFileReference::file(__DIR__ . '/path-to-my-key-stored-in-a-file.pem'); // this just keeps a reference to file
Symmetric algorithms use the same key for both signature creation and verification. This means that it's really important that your key remains secret.
!!! Tip It is recommended that you use a key with lots of entropy, preferably generated using a cryptographically secure pseudo-random number generator (CSPRNG). You can use the CryptoKey tool to do this for you.
use Lcobucci\JWT\Configuration;
use Lcobucci\JWT\Signer\Hmac\Sha256;
use Lcobucci\JWT\Signer\Key\InMemory;
$configuration = Configuration::forSymmetricSigner(
// You may use any HMAC variations (256, 384, and 512)
new Sha256(),
// replace the value below with a key of your own!
InMemory::base64Encoded('mBC5v1sOKVvbdEitdSBenu59nfNfhwkedkJVNabosTw=')
// You may also override the JOSE encoder/decoder if needed by providing extra arguments here
);
Asymmetric algorithms use a private key for signature creation and a public key for verification. This means that it's fine to distribute your public key. However, the private key should remain secret.
use Lcobucci\JWT\Configuration;
use Lcobucci\JWT\Signer;
use Lcobucci\JWT\Signer\Key\LocalFileReference;
use Lcobucci\JWT\Signer\Key\InMemory;
$configuration = Configuration::forAsymmetricSigner(
// You may use RSA or ECDSA and all their variations (256, 384, and 512)
new Signer\Rsa\Sha256(),
LocalFileReference::file(__DIR__ . '/my-private-key.pem'),
InMemory::base64Encoded('mBC5v1sOKVvbdEitdSBenu59nfNfhwkedkJVNabosTw=')
// You may also override the JOSE encoder/decoder if needed by providing extra arguments here
);
!!! Important
The implementation of ECDSA algorithms have a constructor dependency.
Use the create()
named constructor to avoid having to handle it (e.g.: Lcobucci\JWT\Signer\Ecdsa\Sha256::create()
).
!!! Warning This configuration type is NOT recommended for production environments. It's only provided to allow people to have a simpler and faster setup for tests, avoiding any kind of signature creation/verification.
use Lcobucci\JWT\Configuration;
$configuration = Configuration::forUnsecuredSigner(
// You may also override the JOSE encoder/decoder if needed by providing extra arguments here
);
By using the setters of the Lcobucci\JWT\Configuration
you may customise the setup of this library.
!!! Important If you want to use a customised configuration, please make sure you call the setters before of invoking any getter. Otherwise, the default implementations will be used.
These are the available setters:
Lcobucci\JWT\Configuration#setBuilderFactory()
: configures how the token builder should be createdLcobucci\JWT\Configuration#setParser()
: configures a custom token parserLcobucci\JWT\Configuration#setValidator()
: configures a custom validatorLcobucci\JWT\Configuration#setValidationConstraints()
: configures the default set of validation constraints
Once you've made all the necessary configuration you can pass the configuration object around your code and use the getters to retrieve the components:
These are the available getters:
Lcobucci\JWT\Configuration#builder()
: retrieves the token builder (always creating a new instance)Lcobucci\JWT\Configuration#parser()
: retrieves the token parserLcobucci\JWT\Configuration#signer()
: retrieves the signerLcobucci\JWT\Configuration#signingKey()
: retrieves the key for signature creationLcobucci\JWT\Configuration#verificationKey()
: retrieves the key for signature verificationLcobucci\JWT\Configuration#validator()
: retrieves the token validatorLcobucci\JWT\Configuration#validationConstraints()
: retrieves the default set of validation constraints