JWS Loading
Signed tokens are loaded by a serializer or the serializer manager and verified by the
JWSVerifier
object. This JWSVerifier object just requires an algorithm manager.In the following example, we will try to load a signed token. We will only use the
HS256
algorithm.<?php
use Jose\Component\Core\AlgorithmManager;
use Jose\Component\Signature\Algorithm\HS256;
use Jose\Component\Signature\JWSVerifier;
// The algorithm manager with the HS256 algorithm.
$algorithmManager = new AlgorithmManager([
new HS256(),
]);
// We instantiate our JWS Verifier.
$jwsVerifier = new JWSVerifier(
$algorithmManager
);
Now we can deserialize the input we receive and check the signature using our key. We will continue with the data we got in the JWS creation section.
We do not check header parameters here, but it is very important to do it. This step is described in the Header Checker section.
Note: we do not check header parameters here, but it is very important to do it. This step is described in the Header Checker section.
<?php
use Jose\Component\Core\JWK;
use Jose\Component\Signature\Serializer\JWSSerializerManager;
use Jose\Component\Signature\Serializer\CompactSerializer;
// Our key.
$jwk = new JWK([
'kty' => 'oct',
'k' => 'dzI6nbW4OcNF-AtfxGAmuyz7IpHRudBI0WgGjZWgaRJt6prBn3DARXgUR8NVwKhfL43QBIU2Un3AvCGCHRgY4TbEqhOi8-i98xxmCggNjde4oaW6wkJ2NgM3Ss9SOX9zS3lcVzdCMdum-RwVJ301kbin4UtGztuzJBeg5oVN00MGxjC2xWwyI0tgXVs-zJs5WlafCuGfX1HrVkIf5bvpE0MQCSjdJpSeVao6-RSTYDajZf7T88a2eVjeW31mMAg-jzAWfUrii61T_bYPJFOXW8kkRWoa1InLRdG6bKB9wQs9-VdXZP60Q4Yuj_WZ-lO7qV9AEFrUkkjpaDgZT86w2g',
]);
// The serializer manager. We only use the JWS Compact Serialization Mode.
$serializerManager = new JWSSerializerManager([
new CompactSerializer(),
]);
// The input we want to check
$token = 'eyJhbGciOiJIUzI1NiJ9.eyJpYXQiOjE1MDc4OTY5OTIsIm5iZiI6MTUwNzg5Njk5MiwiZXhwIjoxNTA3OTAwNTkyLCJpc3MiOiJNeSBzZXJ2aWNlIiwiYXVkIjoiWW91ciBhcHBsaWNhdGlvbiJ9.eycp9PTdgO4WA-68-AMoHPwsKDr68NhjIQKz4lUkiI0';
// We try to load the token.
$jws = $serializerManager->unserialize($token);
// We verify the signature. This method does NOT check the header.
// The arguments are:
// - The JWS object,
// - The key,
// - The index of the signature to check. See
$isVerified = $jwsVerifier->verifyWithKey($jws, $jwk, 0);
The method
verifyWithKey
returns a boolean. If true, then your token signature is valid. You can then check the claims (if any) using the claim checker manager.To avoid duplication of code lines, you can create a
JWSLoader
object. This object contains a serializer, a verifier and an optional header checker (highly recommended).In the following example, the
JWSLoader
object will try to unserialize the token $token
, check the header parameters and verify the signature with the key $jwk
. The variable $payload
corresponds to the detached payload (null
by default).If the verification succeeded, the variable
$signature
will be set with the signature index and should be in case of multiple signatures. The method returns the JWS object.<?php
use Jose\Component\Signature\JWSLoader;
$jwsLoader = new JWSLoader(
$serializerManager,
$jwsVerifier,
$headerCheckerManager
);
$jws = $jwsLoader->loadAndVerifyWithKey($token, $jwk, $signature, $payload);
In case you use a key set, you can use the method
loadAndVerifyWithKeySet
.This feature was introduced in version 1.1.
The
JWSLoaderFactory
object is able to create JWSLoader
objects on demand. It requires the following factories:JWSSerializerManagerFactory
JWSVerifierFactory
HeaderCheckerManagerFactory
(optional)
<?php
use Jose\Component\Signature\JWSLoaderFactory;
$jwsLoaderFactory = new JWSLoaderFactory(
$jwsSerializerManagerFactory,
$jwsVerifierFactory,
$headerCheckerManagerFactory
);
$jwsLoader = $jwsLoaderFactory->create(
['jws_compact'], // List of serializer aliases
['HS256'], // List of signature algorithm aliases
['alg'] // Optional list of header checker aliases
);
Last modified 1yr ago