Created JWTService and related classes

module/Rest/test/Authentication/JWTServiceTest.php

@@ -0,0 +1,93 @@
+<?php
+namespace ShlinkioTest\Shlink\Rest\Authentication;
+
+use Firebase\JWT\JWT;
+use PHPUnit_Framework_TestCase as TestCase;
+use Shlinkio\Shlink\Core\Options\AppOptions;
+use Shlinkio\Shlink\Rest\Authentication\JWTService;
+use Shlinkio\Shlink\Rest\Entity\ApiKey;
+
+class JWTServiceTest extends TestCase
+{
+    /**
+     * @var JWTService
+     */
+    protected $service;
+
+    public function setUp()
+    {
+        $this->service = new JWTService(new AppOptions([
+            'name' => 'ShlinkTest',
+            'version' => '10000.3.1',
+            'secret_key' => 'foo',
+        ]));
+    }
+
+    /**
+     * @test
+     */
+    public function tokenIsProperlyCreated()
+    {
+        $id = 34;
+        $token = $this->service->create((new ApiKey())->setId($id));
+        $payload = (array) JWT::decode($token, 'foo', [JWTService::DEFAULT_ENCRYPTION_ALG]);
+        $this->assertGreaterThanOrEqual($payload['iat'], time());
+        $this->assertGreaterThan(time(), $payload['exp']);
+        $this->assertEquals($id, $payload['key']);
+        $this->assertEquals('auth', $payload['sub']);
+        $this->assertEquals('ShlinkTest:v10000.3.1', $payload['iss']);
+    }
+
+    /**
+     * @test
+     */
+    public function refreshIncreasesExpiration()
+    {
+        $originalLifetime = 10;
+        $newLifetime = 30;
+        $originalPayload = ['exp' => time() + $originalLifetime];
+        $token = JWT::encode($originalPayload, 'foo');
+        $newToken = $this->service->refresh($token, $newLifetime);
+        $newPayload = (array) JWT::decode($newToken, 'foo', [JWTService::DEFAULT_ENCRYPTION_ALG]);
+
+        $this->assertGreaterThan($originalPayload['exp'], $newPayload['exp']);
+    }
+
+    /**
+     * @test
+     */
+    public function verifyReturnsTrueWhenTheTokenIsCorrect()
+    {
+        $this->assertTrue($this->service->verify(JWT::encode([], 'foo')));
+    }
+
+    /**
+     * @test
+     */
+    public function verifyReturnsFalseWhenTheTokenIsCorrect()
+    {
+        $this->assertFalse($this->service->verify('invalidToken'));
+    }
+
+    /**
+     * @test
+     */
+    public function getPayloadWorksWithCorrectTokens()
+    {
+        $originalPayload = [
+            'exp' => time() + 10,
+            'sub' => 'testing',
+        ];
+        $token = JWT::encode($originalPayload, 'foo');
+        $this->assertEquals($originalPayload, $this->service->getPayload($token));
+    }
+
+    /**
+     * @test
+     * @expectedException \Shlinkio\Shlink\Rest\Exception\AuthenticationException
+     */
+    public function getPayloadThrowsExceptionWithIncorrectTokens()
+    {
+        $this->service->getPayload('invalidToken');
+    }
+}