Algorithm Management (JWA)
The algorithm management is part of the
composer require web-token/jwt-core
For each cryptographic operation you will perform, you will need at least one algorithm.
These algorithms are managed by an Algorithm Manager.
In the following example, we will create an algorithm manager that will handle two algorithms:
use Jose\Component\Core\AlgorithmManager; use Jose\Component\Signature\Algorithm\PS256; use Jose\Component\Signature\Algorithm\ES512; $algorithm_manager = AlgorithmManager::create([ new PS256(), new ES512(), ]);
It is not possible to set the same algorithm twice in the same algorithm manager.
Algorithm Manager Factory
Your application may need several algorithm managers for several use cases. Let say:
- Your application issues signed events to a platform
- Your application issues authentication tokens for registered users.
To avoid mixing algorithms in one algorithm manager or instantiate several times the algorithms for several algorithm managers, this framework provides an Algorithm Manager Factory.
This factory will create algorithm managers on demand. It also allows the same algorithm to be instantiated multiple times but with different configuration options.
Each algorithm is identified using an alias. We recommend to use the algorithm name as an alias.
use Jose\Component\Core\AlgorithmManagerFactory; use Jose\Component\Signature\Algorithm\PS256; use Jose\Component\Encryption\Algorithm\KeyEncryption\PBES2HS512A256KW; use Jose\Component\Encryption\Algorithm\ContentEncryption\A128CBCHS256; $algorithm_manager_factory = new AlgorithmManagerFactory(); $algorithm_manager_factory ->add('PS256', new PS256()) ->add('A128CBC-HS256', new A128CBCHS256()) ->add('PBES2-HS512+A256KW', new PBES2HS512A256KW()) ->add('PBES2-HS512+A256KW with custom configuration', new PBES2HS512A256KW(128, 8192)) ;
The first argument of the method
add is the alias for the algorithm. It must be unique.
As you can see in the example, we added the algorithm
PBES2-HS512+A256KW twice: with the default configuration and with custom arguments.
Now that our algorithm manager factory is ready, we can create several algorithm managers by passing a list of aliases to the method
'PS256']); $encryption_algorithm_manager = $algorithm_manager_factory->create(['A128CBC-HS256', 'PBES2-HS512+A256KW']); $encryption_algorithm_manager_for_paranoid = $algorithm_manager_factory->create(['A128CBC-HS256', 'PBES2-HS512+A256KW with custom configuration']);$signature_algorithm_manager = $algorithm_manager_factory->create([