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<?php declare(strict_types=1);
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namespace jschreuder\MiddleAuth\Abac;
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use jschreuder\MiddleAuth\AuthorizationHandlerInterface;
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use jschreuder\MiddleAuth\AuthorizationMiddlewareInterface;
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use jschreuder\MiddleAuth\AuthorizationRequestInterface;
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use jschreuder\MiddleAuth\AuthorizationResponseInterface;
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use jschreuder\MiddleAuth\Basic\AuthorizationResponse;
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use jschreuder\MiddleAuth\Util\AuthLoggerInterface;
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use jschreuder\MiddleAuth\Util\NullAuthLogger;
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final class AbacMiddleware implements AuthorizationMiddlewareInterface
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{
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private AuthLoggerInterface $logger;
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public function __construct(
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private PolicyProviderInterface $policyProvider,
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?AuthLoggerInterface $logger = null
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)
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{
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$this->logger = $logger ?? new NullAuthLogger();
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}
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public function process(
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AuthorizationRequestInterface $request,
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AuthorizationHandlerInterface $handler
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): AuthorizationResponseInterface
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{
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$actor = $request->getSubject();
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$resource = $request->getResource();
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$action = $request->getAction();
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$context = $request->getContext();
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$policies = $this->policyProvider->getPolicies($actor, $resource, $action, $context);
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$this->logger->debug('ABAC middleware evaluating request', [
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'subject_type' => $actor->getType(),
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'subject_id' => $actor->getId(),
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'resource_type' => $resource->getType(),
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'resource_id' => $resource->getId(),
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'action' => $action,
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'policies_count' => $policies->count(),
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'context_keys' => array_keys($context),
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]);
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foreach ($policies as $policy) {
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$policyDescription = $policy->getDescription();
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$this->logger->debug('Evaluating policy', ['policy_description' => $policyDescription]);
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if ($policy->evaluate($actor, $resource, $action, $context)) {
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$this->logger->debug('Policy granted access', ['policy_description' => $policyDescription ?? $policy->getDescription()]);
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return new AuthorizationResponse(
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true,
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'Access granted by ' . self::class,
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self::class
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);
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}
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}
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$this->logger->debug('No policies granted access, delegating to next handler');
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return $handler->handle($request);
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}
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}
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jschreuder /
MiddleAuth
