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Fixed OIDC handling when no JWKS 'use' prop exists

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Now assume, based on OIDC discovery spec, that keys without 'use' are
'sig' keys. Should not affect existing use-cases since existance of such
keys would have throw exceptions in prev. versions of bookstack.

For #3869
This commit is contained in:
Dan Brown 2022-11-23 11:50:59 +00:00
parent 85b7b10c01
commit e20c944350
No known key found for this signature in database
GPG Key ID: 46D9F943C24A2EF9
4 changed files with 45 additions and 38 deletions
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9
app/Auth/Access/Oidc/OidcJwtSigningKey.php
View File

@ -67,11 +67,10 @@ class OidcJwtSigningKey
throw new OidcInvalidKeyException("Only RS256 keys are currently supported. Found key using {$alg}");
}
if (empty($jwk['use'])) {
throw new OidcInvalidKeyException('A "use" parameter on the provided key is expected');
}
if ($jwk['use'] !== 'sig') {
// 'use' is optional for a JWK but we assume 'sig' where no value exists since that's what
// the OIDC discovery spec infers since 'sig' MUST be set if encryption keys come into play.
$use = $jwk['use'] ?? 'sig';
if ($use !== 'sig') {
throw new OidcInvalidKeyException("Only signature keys are currently supported. Found key for use {$jwk['use']}");
}

42
app/Auth/Access/Oidc/OidcProviderSettings.php
View File

@ -15,40 +15,17 @@ use Psr\Http\Client\ClientInterface;
*/
class OidcProviderSettings
{
/**
* @var string
*/
public $issuer;
/**
* @var string
*/
public $clientId;
/**
* @var string
*/
public $clientSecret;
/**
* @var string
*/
public $redirectUri;
/**
* @var string
*/
public $authorizationEndpoint;
/**
* @var string
*/
public $tokenEndpoint;
public string $issuer;
public string $clientId;
public string $clientSecret;
public ?string $redirectUri;
public ?string $authorizationEndpoint;
public ?string $tokenEndpoint;
/**
* @var string[]|array[]
*/
public $keys = [];
public ?array $keys = [];
public function __construct(array $settings)
{
@ -164,9 +141,10 @@ class OidcProviderSettings
protected function filterKeys(array $keys): array
{
return array_filter($keys, function (array $key) {
$alg = $key['alg'] ?? null;
$alg = $key['alg'] ?? 'RS256';
$use = $key['use'] ?? 'sig';
return $key['kty'] === 'RSA' && $key['use'] === 'sig' && (is_null($alg) || $alg === 'RS256');
return $key['kty'] === 'RSA' && $use === 'sig' && $alg === 'RS256';
});
}

1
app/Auth/Access/Oidc/OidcService.php
View File

@ -52,7 +52,6 @@ class OidcService
{
$settings = $this->getProviderSettings();
$provider = $this->getProvider($settings);
return [
'url' => $provider->getAuthorizationUrl(),
'state' => $provider->getState(),

31
tests/Auth/OidcTest.php
View File

@ -360,6 +360,37 @@ class OidcTest extends TestCase
$this->assertTrue(auth()->check());
}
public function test_auth_login_with_autodiscovery_with_keys_that_do_not_have_use_property()
{
// Based on reading the OIDC discovery spec:
// > This contains the signing key(s) the RP uses to validate signatures from the OP. The JWK Set MAY also
// > contain the Server's encryption key(s), which are used by RPs to encrypt requests to the Server. When
// > both signing and encryption keys are made available, a use (Key Use) parameter value is REQUIRED for all
// > keys in the referenced JWK Set to indicate each key's intended usage.
// We can assume that keys without use are intended for signing.
$this->withAutodiscovery();
$keyArray = OidcJwtHelper::publicJwkKeyArray();
unset($keyArray['use']);
$this->mockHttpClient([
$this->getAutoDiscoveryResponse(),
new Response(200, [
'Content-Type' => 'application/json',
'Cache-Control' => 'no-cache, no-store',
'Pragma' => 'no-cache',
], json_encode([
'keys' => [
$keyArray,
],
])),
]);
$this->assertFalse(auth()->check());
$this->runLogin();
$this->assertTrue(auth()->check());
}
public function test_login_group_sync()
{
config()->set([