├── .gitignore
├── CONTRIBUTING.md
├── phpunit.xml
├── src
    └── IndieAuth
    │   ├── ErrorResponse.php
    │   └── Client.php
├── composer.json
├── tests
    ├── bootstrap.php
    ├── NormalizeTest.php
    ├── ScopeTest.php
    ├── DiscoveryTest.php
    ├── ClientTest.php
    └── MetadataTest.php
├── .github
    └── workflows
    │   └── main.yml
├── LICENSE.txt
├── README.md
└── composer.lock


/.gitignore:
--------------------------------------------------------------------------------
1 | /vendor/
2 | .DS_Store
3 | 


--------------------------------------------------------------------------------
/CONTRIBUTING.md:
--------------------------------------------------------------------------------
1 | By contributing to this project, you agree to irrevocably release your contributions under the same licenses as this project. See README.md for more details.
2 | 


--------------------------------------------------------------------------------
/phpunit.xml:
--------------------------------------------------------------------------------
1 | <phpunit bootstrap="tests/bootstrap.php">
2 |   <testsuites>
3 |     <testsuite name="Tests">
4 |       <directory>tests/</directory>
5 |     </testsuite>
6 |   </testsuites>
7 | </phpunit>
8 | 


--------------------------------------------------------------------------------
/src/IndieAuth/ErrorResponse.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | 
 3 | namespace IndieAuth;
 4 | 
 5 | class ErrorResponse
 6 | {
 7 |   private $code;
 8 |   private $description;
 9 |   private $debug;
10 | 
11 |   public function __construct($code, $description, $debug = null)
12 |   {
13 |     $this->code = $code;
14 |     $this->description = $description;
15 |     $this->debug = $debug;
16 |   }
17 | 
18 |   /**
19 |    * @return array
20 |    */
21 |   public function getArray()
22 |   {
23 |     $response = [
24 |       'error' => $this->code,
25 |       'error_description' => $this->description,
26 |     ];
27 | 
28 |     if ($this->debug) {
29 |       $response['debug'] = $this->debug;
30 |     }
31 | 
32 |     return [false, $response];
33 |   }
34 | }
35 | 
36 | 


--------------------------------------------------------------------------------
/composer.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "indieauth/client",
 3 |   "description": "IndieAuth Client Library",
 4 |   "require": {
 5 |     "php": ">5.6.0",
 6 |     "mf2/mf2": "^0.5",
 7 |     "p3k/http": "^0.1",
 8 |     "indieweb/representative-h-card": "^0.1.2"
 9 |   },
10 |   "license": "Apache-2.0",
11 |   "authors": [
12 |     {
13 |       "name": "Aaron Parecki",
14 |       "homepage": "https://aaronparecki.com"
15 |     }
16 |   ],
17 |   "funding": [
18 |     {
19 |       "type": "opencollective",
20 |       "url": "https://opencollective.com/indieweb"
21 |     }
22 |   ],
23 |   "autoload": {
24 |     "psr-4": {
25 |       "IndieAuth\\": "src/IndieAuth/"
26 |     }
27 |   },
28 |   "require-dev": {
29 |     "yoast/phpunit-polyfills": "^1.0"
30 |   }
31 | }
32 | 


--------------------------------------------------------------------------------
/tests/bootstrap.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | const TESTING = true;
 3 | require __DIR__ . '/../vendor/autoload.php';
 4 | 
 5 | use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 6 | 
 7 | class IndieAuthTestCase extends TestCase {
 8 | 
 9 |   protected function _invokeMethod(&$object, $methodName, $params=[]) {
10 |     $reflection = new \ReflectionClass(get_class($object));
11 |     $method = $reflection->getMethod($methodName);
12 |     $method->setAccessible(true);
13 |     return $method->invokeArgs($object, $params);
14 |   }
15 | 
16 |   protected function _invokeStaticMethod($class, $methodName, $params=[]) {
17 |     $reflection = new \ReflectionClass($class);
18 |     $method = $reflection->getMethod($methodName);
19 |     $method->setAccessible(true);
20 |     return $method->invokeArgs(null, $params);
21 |   }
22 | 
23 | }
24 | 


--------------------------------------------------------------------------------
/.github/workflows/main.yml:
--------------------------------------------------------------------------------
 1 | name: Unit Tests
 2 | 
 3 | on:
 4 |   push:
 5 |     branches: [ "main" ]
 6 |   pull_request:
 7 |     branches: [ "main" ]
 8 |   workflow_dispatch:
 9 | 
10 | permissions:
11 |   contents: read
12 | 
13 | jobs:
14 |   build:
15 | 
16 |     strategy:
17 |       matrix:
18 |         php: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
19 | 
20 |     runs-on: ubuntu-latest
21 | 
22 |     steps:
23 |     - uses: actions/checkout@v3
24 | 
25 |     - name: Validate composer.json and composer.lock
26 |       run: composer validate --strict
27 | 
28 |     - name: Cache Composer packages
29 |       id: composer-cache
30 |       uses: actions/cache@v3
31 |       with:
32 |         path: vendor
33 |         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
34 |         restore-keys: |
35 |           ${{ runner.os }}-php-
36 | 
37 |     - name: Install dependencies
38 |       run: composer install --prefer-dist --no-progress
39 | 
40 |     - name: Run test suite
41 |       run: ./vendor/bin/phpunit
42 | 
43 | 


--------------------------------------------------------------------------------
/tests/NormalizeTest.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | 
 3 | class NormalizeTest extends IndieAuthTestCase {
 4 | 
 5 |   public function testBareDomain() {
 6 |     $url = 'aaronpk.com';
 7 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
 8 |     $this->assertEquals('http://aaronpk.com/', $normalized);
 9 |   }
10 | 
11 |   public function testNoSchemeWithPath() {
12 |     $url = 'aaronpk.com/me';
13 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
14 |     $this->assertEquals('http://aaronpk.com/me', $normalized);
15 |   }
16 | 
17 |   public function testNoSlash() {
18 |     $url = 'https://aaronpk.com';
19 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
20 |     $this->assertEquals('https://aaronpk.com/', $normalized);
21 |   }
22 | 
23 |   public function testRejectsInvalidScheme() {
24 |     $url = 'mailto:me@example.com';
25 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
26 |     $this->assertEquals(false, $normalized);
27 |   }
28 | 
29 |   public function testAllowsQueryString() {
30 |     $url = 'https://aaronpk.com?foo';
31 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
32 |     $this->assertEquals('https://aaronpk.com/?foo', $normalized);
33 |   }
34 | 
35 |   public function testRejectsFragment() {
36 |     $url = 'https://aaronpk.com/#me';
37 |     $normalized = IndieAuth\Client::normalizeMeURL($url);
38 |     $this->assertEquals(false, $normalized);
39 |   }
40 | 
41 | }
42 | 
43 | 


--------------------------------------------------------------------------------
/tests/ScopeTest.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | 
 3 | class ScopeTest extends IndieAuthTestCase {
 4 | 
 5 |   public function testFindsProfileScopes() {
 6 |     $scopes = IndieAuth\Client::parseNonProfileScopes('profile email create update');
 7 |     $this->assertTrue(is_array($scopes));
 8 |     $this->assertContains('create', $scopes);
 9 |     $this->assertContains('update', $scopes);
10 |     $this->assertNotContains('profile', $scopes);
11 |     $this->assertNotContains('email', $scopes);
12 |   }
13 | 
14 |   public function testWorksWithEmptyScope() {
15 |     $scopes = IndieAuth\Client::parseNonProfileScopes('');
16 |     $this->assertTrue(is_array($scopes));
17 |     $this->assertNotContains('profile', $scopes);
18 |     $this->assertNotContains('email', $scopes);
19 |   }
20 | 
21 |   public function testAcceptsFalseInput() {
22 |     $scopes = IndieAuth\Client::parseNonProfileScopes(false);
23 |     $this->assertTrue(is_array($scopes));
24 |     $this->assertNotContains('profile', $scopes);
25 |     $this->assertNotContains('email', $scopes);
26 |   }
27 | 
28 |   public function testExcludesOneScope() {
29 |     $scopes = IndieAuth\Client::parseNonProfileScopes('profile');
30 |     $this->assertTrue(is_array($scopes));
31 |     $this->assertNotContains('profile', $scopes);
32 |   }
33 | 
34 |   public function testIncludesOneScope() {
35 |     $scopes = IndieAuth\Client::parseNonProfileScopes('create');
36 |     $this->assertTrue(is_array($scopes));
37 |     $this->assertContains('create', $scopes);
38 |   }
39 | 
40 | }
41 | 


--------------------------------------------------------------------------------
/tests/DiscoveryTest.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | 
 3 | class DiscoveryTest extends IndieAuthTestCase {
 4 | 
 5 |   public function testExtractEndpointFromHTML() {
 6 |     $html = '<html><head><link rel="micropub" href="/micropub"></head><body><h1>Hello World</h1></body></html>';
 7 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
 8 |       '_extractEndpointFromHTML', [$html, 'https://example.com/foo', 'micropub']);
 9 |     $this->assertEquals('https://example.com/micropub', $result);
10 |   }
11 | 
12 |   public function testExtractRelativeEndpointFromHTML() {
13 |     $html = '<html><head><link rel="micropub" href="micropub"></head><body><h1>Hello World</h1></body></html>';
14 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
15 |       '_extractEndpointFromHTML', [$html, 'https://example.com/foo/', 'micropub']);
16 |     $this->assertEquals('https://example.com/foo/micropub', $result);
17 |   }
18 | 
19 |   public function testExtractEmptyStringEndpointFromHTML() {
20 |     $html = '<html><head><link rel="micropub" href=""></head><body><h1>Hello World</h1></body></html>';
21 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
22 |       '_extractEndpointFromHTML', [$html, 'https://example.com/micropub', 'micropub']);
23 |     $this->assertEquals('https://example.com/micropub', $result);
24 |   }
25 | 
26 |   public function testExtractEndpointFromHeaders() {
27 |     $headers = 'HTTP/1.1 200 Ok
28 | Content-Type: text/html; charset=UTF-8
29 | Cache-Control: no-cache
30 | Link: <https://switchboard.p3k.io/>; rel="hub"
31 | Link: </auth>; rel="authorization_endpoint"
32 | Link: </micropub>; rel="micropub"
33 | Link: </token>; rel="token_endpoint"';
34 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
35 |       '_extractEndpointFromHeaders', [$headers, 'https://example.com/foo', 'micropub']);
36 |     $this->assertEquals('https://example.com/micropub', $result);
37 |   }  
38 | 
39 |   public function testExtractRelativeEndpointFromHeaders() {
40 |     $headers = 'HTTP/1.1 200 Ok
41 | Content-Type: text/html; charset=UTF-8
42 | Cache-Control: no-cache
43 | Link: <https://switchboard.p3k.io/>; rel="hub"
44 | Link: </auth>; rel="authorization_endpoint"
45 | Link: <micropub>; rel="micropub"
46 | Link: </token>; rel="token_endpoint"';
47 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
48 |       '_extractEndpointFromHeaders', [$headers, 'https://example.com/foo/', 'micropub']);
49 |     $this->assertEquals('https://example.com/foo/micropub', $result);
50 |   }  
51 | 
52 |   public function testExtractEmptyStringEndpointFromHeaders() {
53 |     $headers = 'HTTP/1.1 200 Ok
54 | Content-Type: text/html; charset=UTF-8
55 | Cache-Control: no-cache
56 | Link: <https://switchboard.p3k.io/>; rel="hub"
57 | Link: <>; rel="authorization_endpoint"
58 | Link: <>; rel="micropub"
59 | Link: <>; rel="token_endpoint"';
60 |     $result = $this->_invokeStaticMethod(IndieAuth\Client::class, 
61 |       '_extractEndpointFromHeaders', [$headers, 'https://example.com/micropub', 'micropub']);
62 |     $this->assertEquals('https://example.com/micropub', $result);
63 |   }  
64 | 
65 | }
66 | 


--------------------------------------------------------------------------------
/tests/ClientTest.php:
--------------------------------------------------------------------------------
  1 | <?php  
  2 | /**
  3 |  * General IndieAuth Client tests
  4 |  */
  5 | 
  6 | use IndieAuth\Client;
  7 | use IndieAuth\ErrorResponse;
  8 | 
  9 | class ClientTest extends IndieAuthTestCase
 10 | {
 11 |   public function setUp(): void
 12 |   {
 13 |     if (!isset($_SESSION)) {
 14 |       $_SESSION = [];
 15 |     }
 16 |   }
 17 | 
 18 |   public function testErrorResponse()
 19 |   {
 20 |     $object = new ErrorResponse('missing_state', 'The state is missing', 'debug information');
 21 |     $result = $object->getArray();
 22 | 
 23 |     $this->assertIsArray($result);
 24 |     $this->assertCount(2, $result);
 25 | 
 26 |     if (isset($result[1])) {
 27 |       $error = $result[1];
 28 |       $this->assertIsArray($error);
 29 |       $this->assertCount(3, $error);
 30 | 
 31 |       $this->assertArrayHasKey('error', $error);
 32 |       $this->assertArrayHasKey('error_description', $error);
 33 |       $this->assertArrayHasKey('debug', $error);
 34 | 
 35 |       $this->assertEquals('missing_state', $error['error']);
 36 |       $this->assertEquals('The state is missing', $error['error_description']);
 37 |       $this->assertEquals('debug information', $error['debug']);
 38 |     }
 39 |   }
 40 | 
 41 |   public function testValidateState()
 42 |   {
 43 |     $expected_state = 'example_state';
 44 |     $params = ['state' => $expected_state];
 45 |     $response = Client::validateStateMatch($params, $expected_state);
 46 |     $this->assertNull($response);
 47 |   }
 48 | 
 49 |   public function testValidateStateCase()
 50 |   {
 51 |     $params = ['state' => 'example_state'];
 52 |     $response = Client::validateStateMatch($params, 'Example_State');
 53 |     $this->assertInstanceOf(ErrorResponse::class, $response);
 54 |   }
 55 | 
 56 |   public function testValidateStateMissing()
 57 |   {
 58 |     $params = [];
 59 |     $response = Client::validateStateMatch($params, 'state');
 60 |     $this->assertInstanceOf(ErrorResponse::class, $response);
 61 |   }
 62 | 
 63 |   public function testValidateStateMismatch()
 64 |   {
 65 |     $params = ['state' => 'example_state'];
 66 |     $response = Client::validateStateMatch($params, 'unexpected_state');
 67 |     $this->assertInstanceOf(ErrorResponse::class, $response);
 68 |   }
 69 | 
 70 |   public function testValidateIssuer()
 71 |   {
 72 |     $expected_issuer = 'https://issuer.example.com/';
 73 |     $params = ['iss' => $expected_issuer];
 74 |     $response = Client::validateIssuerMatch($params, $expected_issuer);
 75 |     $this->assertNull($response);
 76 |   }
 77 | 
 78 |   public function testValidateIssuerNormalizes()
 79 |   {
 80 |     $expected_issuer = 'https://issuer.example.com';
 81 |     $params = ['iss' => $expected_issuer];
 82 |     $response = Client::validateIssuerMatch($params, $expected_issuer.'/');
 83 |     $this->assertNull($response);
 84 |   }
 85 | 
 86 |   public function testValidateIssuerMissing()
 87 |   {
 88 |     $expected_issuer = 'https://issuer.example.com/';
 89 |     $params = [];
 90 |     $response = Client::validateIssuerMatch($params, $expected_issuer);
 91 |     $this->assertInstanceOf(ErrorResponse::class, $response);
 92 |   }
 93 | 
 94 |   public function testValidateIssuerMismatch()
 95 |   {
 96 |     $params = ['iss' => 'https://issuer.example.com/'];
 97 |     $response = Client::validateIssuerMatch($params, 'https://example.org/');
 98 |     $this->assertInstanceOf(ErrorResponse::class, $response);
 99 |   }
100 | 
101 | }
102 | 
103 | 


--------------------------------------------------------------------------------
/tests/MetadataTest.php:
--------------------------------------------------------------------------------
  1 | <?php  
  2 | 
  3 | use IndieAuth\Client;
  4 | use IndieAuth\ErrorResponse;
  5 | 
  6 | class MetadataTest extends IndieAuthTestCase {
  7 | 
  8 |   private $default_metadata = '{"issuer":"https://example.com/","authorization_endpoint":"https://example.com/authorization-endpoint","token_endpoint":"https://example.com/token-endpoint","revocation_endpoint":"https://example.com/revocation-endpoint","introspection_endpoint":"https://example.com/introspection-endpoint","userinfo_endpoint":"https://example.com/userinfo-endpoint"}';
  9 | 
 10 |   public function testSetAndGetMetadata() {
 11 |     Client::setMetadata('https://example.com/', $this->default_metadata);
 12 |     $metadata = Client::getMetadata();
 13 | 
 14 |     $this->assertIsArray($metadata);
 15 |     $this->assertArrayHasKey('issuer', $metadata);
 16 |     $this->assertArrayHasKey('authorization_endpoint', $metadata);
 17 |     $this->assertArrayHasKey('token_endpoint', $metadata);
 18 |     $this->assertArrayHasKey('revocation_endpoint', $metadata);
 19 |     $this->assertArrayHasKey('introspection_endpoint', $metadata);
 20 |   }
 21 | 
 22 |   public function testSetMetadataInvalid() {
 23 |     # malfored JSON
 24 |     Client::setMetadata('https://example.com/', '{"issuer":"https://example.com/');
 25 |     $metadata = Client::getMetadata();
 26 |     $this->assertNull($metadata);
 27 | 
 28 |     # other content like HTML
 29 |     Client::setMetadata('https://example.com/', '<p> invalid metdata </p>');
 30 |     $metadata = Client::getMetadata();
 31 |     $this->assertNull($metadata);
 32 |   }
 33 | 
 34 |   public function testDiscoverFromMetadata() {
 35 |     Client::setMetadata('https://example.com/', $this->default_metadata);
 36 | 
 37 |     $result = $this->_invokeStaticMethod(
 38 |       Client::class,
 39 |       '_discoverFromMetadata',
 40 |       ['issuer']
 41 |     );
 42 | 
 43 |     $this->assertEquals('https://example.com/', $result);
 44 | 
 45 |     $result = $this->_invokeStaticMethod(
 46 |       Client::class,
 47 |       '_discoverFromMetadata',
 48 |       ['authorization_endpoint']
 49 |     );
 50 | 
 51 |     $this->assertEquals($result, 'https://example.com/authorization-endpoint');
 52 | 
 53 |     $result = $this->_invokeStaticMethod(
 54 |       Client::class,
 55 |       '_discoverFromMetadata',
 56 |       ['token_endpoint']
 57 |     );
 58 | 
 59 |     $this->assertEquals('https://example.com/token-endpoint', $result);
 60 | 
 61 |     $result = $this->_invokeStaticMethod(
 62 |       Client::class,
 63 |       '_discoverFromMetadata',
 64 |       ['revocation_endpoint']
 65 |     );
 66 | 
 67 |     $this->assertEquals('https://example.com/revocation-endpoint', $result);
 68 | 
 69 |     $result = $this->_invokeStaticMethod(
 70 |       Client::class,
 71 |       '_discoverFromMetadata',
 72 |       ['introspection_endpoint']
 73 |     );
 74 | 
 75 |     $this->assertEquals('https://example.com/introspection-endpoint', $result);
 76 | 
 77 |     $result = $this->_invokeStaticMethod(
 78 |       Client::class,
 79 |       '_discoverFromMetadata',
 80 |       ['userinfo_endpoint']
 81 |     );
 82 | 
 83 |     $this->assertEquals('https://example.com/userinfo-endpoint', $result);
 84 |   }
 85 | 
 86 |   public function testIsIssuerValid() {
 87 |     # scheme must be https
 88 |     $result = $this->_invokeStaticMethod(
 89 |       Client::class,
 90 |       '_isIssuerValid',
 91 |       ['http://example.com/', 'https://example.com/indieauth-metadata-endpoint']
 92 |     );
 93 | 
 94 |     $this->assertFalse($result);
 95 | 
 96 |     # no query string allowed
 97 |     $result = $this->_invokeStaticMethod(
 98 |       Client::class,
 99 |       '_isIssuerValid',
100 |       ['https://example.com/?foo=bar', 'https://example.com/indieauth-metadata-endpoint']
101 |     );
102 | 
103 |     $this->assertFalse($result);
104 | 
105 |     # no fragment allowed
106 |     $result = $this->_invokeStaticMethod(
107 |       Client::class,
108 |       '_isIssuerValid',
109 |       ['https://example.com/#issuer', 'https://example.com/indieauth-metadata-endpoint']
110 |     );
111 | 
112 |     $this->assertFalse($result);
113 | 
114 |     # issuer must be prefix of metadata endpoint
115 |     $result = $this->_invokeStaticMethod(
116 |       Client::class,
117 |       '_isIssuerValid',
118 |       ['https://example.com/foo', 'https://example.com/indieauth-metadata-endpoint']
119 |     );
120 | 
121 |     $this->assertFalse($result);
122 | 
123 |     # valid issuer
124 |     $result = $this->_invokeStaticMethod(
125 |       Client::class,
126 |       '_isIssuerValid',
127 |       ['https://example.com/', 'https://example.com/indieauth-metadata-endpoint']
128 |     );
129 | 
130 |     $this->assertTrue($result);
131 |   }
132 | 
133 |   public function testDiscoverIssuer()
134 |   {
135 |     Client::setMetadata('https://example.com/', $this->default_metadata);
136 | 
137 |     $result = $this->_invokeStaticMethod(
138 |       Client::class,
139 |       'discoverIssuer',
140 |       ['https://example.com/indieauth-metadata-endpoint']
141 |     );
142 | 
143 |     $this->assertEquals('https://example.com/', $result);
144 |   }
145 | 
146 |   /**
147 |    * `issuer` must be provided in indieauth-metadata
148 |    */
149 |   public function testDiscoverIssuerMissing()
150 |   {
151 |     Client::setMetadata('https://example.com/', '{"authorization_endpoint":"https://example.com/authorization-endpoint"}');
152 |     $metadata_endpoint = 'https://example.com/indieauth-metadata-endpoint';
153 | 
154 |     $result = $this->_invokeStaticMethod(
155 |       Client::class,
156 |       'discoverIssuer',
157 |       [$metadata_endpoint]
158 |     );
159 |     $this->assertInstanceOf(ErrorResponse::class, $result);
160 |   }
161 | 
162 |   /**
163 |    * `issuer` must be a prefix of the metadata endpoint
164 |    */
165 |   public function testDiscoverIssuerNotAPrefix()
166 |   {
167 |     Client::setMetadata('https://example.org/', $this->default_metadata);
168 |     $metadata_endpoint = 'https://example.org/indieauth-metadata-endpoint';
169 | 
170 |     $result = $this->_invokeStaticMethod(
171 |       Client::class,
172 |       'discoverIssuer',
173 |       [$metadata_endpoint]
174 |     );
175 |     $this->assertInstanceOf(ErrorResponse::class, $result);
176 |   }
177 | 
178 |   public function testDiscoverRevocationEndpoint() {
179 |     Client::setMetadata('https://example.com/', $this->default_metadata);
180 | 
181 |     $result = $this->_invokeStaticMethod(
182 |       Client::class,
183 |       'discoverRevocationEndpoint',
184 |       ['https://example.com/']
185 |     );
186 | 
187 |     $this->assertEquals('https://example.com/revocation-endpoint', $result);
188 |   }
189 | 
190 |   public function testDiscoverIntrospectionEndpoint() {
191 |     Client::setMetadata('https://example.com/', $this->default_metadata);
192 | 
193 |     $result = $this->_invokeStaticMethod(
194 |       Client::class,
195 |       'discoverIntrospectionEndpoint',
196 |       ['https://example.com/']
197 |     );
198 | 
199 |     $this->assertEquals('https://example.com/introspection-endpoint', $result);
200 |   }
201 | 
202 |   public function testDiscoverUserinfoEndpoint() {
203 |     Client::setMetadata('https://example.com/', $this->default_metadata);
204 | 
205 |     $result = $this->_invokeStaticMethod(
206 |       Client::class,
207 |       'discoverUserinfoEndpoint',
208 |       ['https://example.com/']
209 |     );
210 | 
211 |     $this->assertEquals('https://example.com/userinfo-endpoint', $result);
212 |   }
213 | 
214 | }
215 | 


--------------------------------------------------------------------------------
/LICENSE.txt:
--------------------------------------------------------------------------------
  1 | MIT License
  2 | 
  3 | Copyright (c) 2017 Aaron Parecki and contributors
  4 | 
  5 | Permission is hereby granted, free of charge, to any person obtaining a copy
  6 | of this software and associated documentation files (the "Software"), to deal
  7 | in the Software without restriction, including without limitation the rights
  8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  9 | copies of the Software, and to permit persons to whom the Software is
 10 | furnished to do so, subject to the following conditions:
 11 | 
 12 | The above copyright notice and this permission notice shall be included in all
 13 | copies or substantial portions of the Software.
 14 | 
 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 21 | SOFTWARE.
 22 | 
 23 | -------------------------------------------------------------------------------------
 24 | 
 25 | Apache License
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--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # IndieAuth Client
  2 | 
  3 | This is a simple library to help with IndieAuth. There are two ways you may want to use it, either when developing an application that signs people in using IndieAuth, or when developing your own endpoint for issuing access tokens and you need to verify auth codes.
  4 | 
  5 | ![Build Status](https://github.com/indieweb/indieauth-client-php/actions/workflows/main.yml/badge.svg)
  6 | 
  7 | ## Installation
  8 | 
  9 | To install using [Composer](http://getcomposer.org), run:
 10 | 
 11 | ```
 12 | composer require indieauth/client
 13 | ```
 14 | 
 15 | This library follows [PSR-4](https://www.php-fig.org/psr/psr-4/) for autoloading. To autoload, ensure that your application requires the Composer autoload file:
 16 | 
 17 | ```php 
 18 | <?php
 19 | 
 20 | require __DIR__ . '/vendor/autoload.php';
 21 | ```
 22 | 
 23 | ## Quick Start
 24 | 
 25 | If you want to get started quickly, and if you're okay with letting the library store things in the PHP session itself, then you can follow the examples below. If you need more control or want to step into the details of the IndieAuth flow, see the [Detailed Usage for Clients](#detailed-usage-for-clients) below.
 26 | 
 27 | ### Create a Login Form
 28 | 
 29 | You'll first need to create a login form to prompt the user to enter their website address. This might look something like the HTML below.
 30 | 
 31 | ```html
 32 | <form action="/login.php" method="post">
 33 |   <input type="url" name="url">
 34 |   <input type="submit" value="Log In">
 35 | </form>
 36 | ```
 37 | 
 38 | ### Begin the Login Flow
 39 | 
 40 | In the `login.php` file, you'll need to initialize the session, and tell this library to discover the user's endpoints. If everything succeeds, the library will return a URL that you can use to redirect the user to begin the flow.
 41 | 
 42 | The example below will have some really basic error handling, which you'll probably want to replace with something nicer looking.
 43 | 
 44 | Example `login.php` file:
 45 | 
 46 | ```php
 47 | <?php
 48 | 
 49 | if(!isset($_POST['url'])) {
 50 |   die('Missing URL');
 51 | }
 52 | 
 53 | // Start a session for the library to be able to save state between requests.
 54 | session_start();
 55 | 
 56 | // You'll need to set up two pieces of information before you can use the client,
 57 | // the client ID and and the redirect URL.
 58 | 
 59 | // The client ID should be the home page of your app.
 60 | IndieAuth\Client::$clientID = 'https://example.com/';
 61 | 
 62 | // The redirect URL is where the user will be returned to after they approve the request.
 63 | IndieAuth\Client::$redirectURL = 'https://example.com/redirect.php';
 64 | 
 65 | // Pass the user's URL and your requested scope to the client.
 66 | // If you are writing a Micropub client, you should include at least the "create" scope.
 67 | // If you are just trying to log the user in, you can omit the second parameter.
 68 | 
 69 | list($authorizationURL, $error) = IndieAuth\Client::begin($_POST['url'], 'create');
 70 | // or list($authorizationURL, $error) = IndieAuth\Client::begin($_POST['url']);
 71 | 
 72 | // Check whether the library was able to discover the necessary endpoints
 73 | if($error) {
 74 |   echo "<p>Error: ".$error['error']."</p>";
 75 |   echo "<p>".$error['error_description']."</p>";
 76 | } else {
 77 |   // Redirect the user to their authorization endpoint
 78 |   header('Location: '.$authorizationURL);
 79 | }
 80 | ```
 81 | 
 82 | The following scopes have special meaning to the authorization server and will request the user's full profile info instead of just verifying their profile URL:
 83 | 
 84 | * `profile`
 85 | * `email`
 86 | 
 87 | Any other scopes requested are assumed to be scopes that will request an access token be returned and the library will request an access token from the token endpoint in the next step.
 88 | 
 89 | 
 90 | ### Handling the Redirect
 91 | 
 92 | In your redirect file, pass all the query string parameters to the library and it will take care of things! It will use the authorization or token endpoint it found in the initial step, and will use the authorization code to verify the profile information or get an access token depending on whether you've requested any scopes.
 93 | 
 94 | The result will be the response from the authorization endpoint or token, which will contain the user's final `me` URL as well as the access token if you requested one or more scopes.
 95 | 
 96 | If there were any problems, the error information will be returned to you as well.
 97 | 
 98 | The library takes care of verifying the final returned profile URL has the same authorization endpoint as the entered URL.
 99 | 
100 | Example `redirect.php` file:
101 | 
102 | ```php
103 | <?php
104 | session_start();
105 | IndieAuth\Client::$clientID = 'https://example.com/';
106 | IndieAuth\Client::$redirectURL = 'https://example.com/redirect.php';
107 | 
108 | list($response, $error) = IndieAuth\Client::complete($_GET);
109 | 
110 | if($error) {
111 |   echo "<p>Error: ".$error['error']."</p>";
112 |   echo "<p>".$error['error_description']."</p>";
113 | } else {
114 |   // Login succeeded!
115 |   // The library will return the user's profile URL in the property "me"
116 |   // It will also return the full response from the authorization or token endpoint, as well as debug info
117 |   echo "URL: ".$response['me']."<br>";
118 |   if(isset($response['response']['access_token'])) {
119 |     echo "Access Token: ".$response['response']['access_token']."<br>";
120 |     echo "Scope: ".$response['response']['scope']."<br>";
121 |   }
122 | 
123 |   // The full parsed response from the endpoint will be available as:
124 |   // $response['response']
125 | 
126 |   // The raw response:
127 |   // $response['raw_response']
128 | 
129 |   // The HTTP response code:
130 |   // $response['response_code']
131 | 
132 |   // You'll probably want to save the user's URL in the session
133 |   $_SESSION['user'] = $user['me'];
134 | }
135 | ```
136 | 
137 | 
138 | ## Detailed Usage for Clients
139 | 
140 | The first thing an IndieAuth client needs to do is to prompt the user to enter their web address. This is the basis of IndieAuth, where user identifiers are URLs. A typical IndieAuth sign-in form may look something like the following.
141 | 
142 | ```
143 | Your URL: [ example.com ]
144 | 
145 |        [ Sign In ]
146 | ```
147 | 
148 | This form will make a POST request to your app's server, at which point you can begin the IndieAuth discovery.
149 | 
150 | ### Discovering the required endpoints
151 | 
152 | The user will need to define endpoints for their URL before a client can perform authorization. These endpoints should be specified in the [IndieAuth Server Metadata](https://indieauth.spec.indieweb.org/#discovery-by-clients) endpoint using either an HTTP `Link` header or a `<link>` tag with relation `indieauth-metadata`:
153 | 
154 | ```html
155 | <link rel="indieauth-metadata" href="https://example.com/auth-metadata">
156 | ```
157 | 
158 | These discovery methods can be run all sequentially and the library will avoid making duplicate HTTP requests if it has already fetched the page once.
159 | 
160 | #### Metadata Endpoint
161 | 
162 | You should first attempt to discover the metadata endpoint.
163 | 
164 | ```php
165 | // Normalize whatever the user entered to be a URL, e.g. "example.com" to "https://example.com/"
166 | $url = IndieAuth\Client::normalizeMeURL($url);
167 | $metadataEndpoint = IndieAuth\Client::discoverMetadataEndpoint($url);
168 | ```
169 | 
170 | If it is found, then discover and verify the `issuer` parameter in the metadata:
171 | 
172 | ```php
173 | if ($metadataEndpoint) {
174 |   $response = self::discoverIssuer($metadataEndpoint);
175 |   if ($response instanceof IndieAuth\ErrorResponse) {
176 |     // handle the error response, array with keys `error` and `error_description`
177 |     die(json_encode($response->getArray()));
178 |   }
179 | 
180 |   $_SESSION['indieauth_issuer'] = $response;
181 | }
182 | ```
183 | 
184 | The `issuer` value should be stored in the session to verify the Authorization Response later in the process (see below).
185 | 
186 | If the metadata endpoint is not found, the methods below will try to discover the individual `<link>` relations for backwards compability.
187 | 
188 | #### Authorization Endpoint
189 | 
190 | In IndieAuth Server Metadata:
191 | ```json
192 | {
193 |   "authorization_endpoint": "https://indieauth.example.com/auth"
194 | }
195 | ```
196 | 
197 | Or backwards compatible relations:
198 | ```html
199 | <link rel="authorization_endpoint" href="https://example.com/auth">
200 | ```
201 | 
202 | ```
203 | Link: <https://example.com/auth>; rel="authorization_endpoint"
204 | ```
205 | 
206 | The authorization endpoint allows a website to specify the location to direct the user's browser to when performing the initial authorization request.
207 | 
208 | Since this can be a full URL, this allows a website to use an external server as its authorization endpoint. This allows people to delegate the handling and verification of authorization and authentication to an external service to speed up development. Of course at any point, the authorization server can be changed, and API clients and users will not need any modifications.
209 | 
210 | The following function will fetch the user's home page and return the authorization endpoint, or `false` if none was found.
211 | 
212 | ```php
213 | // Normalize whatever the user entered to be a URL, e.g. "example.com" to "http://example.com/"
214 | $url = IndieAuth\Client::normalizeMeURL($url);
215 | $authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($url);
216 | ```
217 | 
218 | #### Token Endpoint
219 | 
220 | In IndieAuth Server Metadata:
221 | ```json
222 | {
223 |   "token_endpoint": "https://indieauth.example.com/token"
224 | }
225 | ```
226 | 
227 | Or backwards compatible relations:
228 | ```html
229 | <link rel="token_endpoint" href="https://example.com/token">
230 | ```
231 | 
232 | ```
233 | Link: <https://example.com/token>; rel="token_endpoint"
234 | ```
235 | 
236 | The token endpoint is where API clients will request access tokens. This will typically be a URL on the user's own website, although this can delegated to an external service as well.
237 | 
238 | The token endpoint is responsible for issuing an access token.
239 | 
240 | The following function will fetch the user's home page and return the token endpoint, or `false` if none was found.
241 | 
242 | ```php
243 | $url = IndieAuth\Client::normalizeMeURL($url);
244 | $tokenEndpoint = IndieAuth\Client::discoverTokenEndpoint($url);
245 | ```
246 | 
247 | #### Micropub Endpoint
248 | 
249 | ```html
250 | <link rel="micropub" href="https://example.com/micropub">
251 | ```
252 | 
253 | ```
254 | Link: <https://example.com/micropub>; rel="micropub"
255 | ```
256 | 
257 | The [Micropub](https://indieweb.org/Micropub) endpoint defines where Micropub clients will make POST requests to create new posts on the user's website. When a Micropub client makes a request, the request will contain the previously-issued access token in the header, and the micropub endpoint will be able to validate the request given that access token.
258 | 
259 | The following function will fetch the user's home page and return the Micropub endpoint, or `false` if none was found.
260 | 
261 | ```php
262 | $url = IndieAuth\Client::normalizeMeURL($url);
263 | $micropubEndpoint = IndieAuth\Client::discoverMicropubEndpoint($url);
264 | ```
265 | 
266 | The client may wish to discover all endpoints at the beginning, and cache the values in a session for later use.
267 | 
268 | #### Microsub Endpoint
269 | 
270 | ```html
271 | <link rel="microsub" href="https://example.com/microsub">
272 | ```
273 | 
274 | ```
275 | Link: <https://example.com/microsub>; rel="microsub"
276 | ```
277 | 
278 | The [Microsub](https://indieweb.comorg/Microsub) endpoint is for [readers](https://indieweb.org/reader). When a Micropub client makes a request, the request will contain the previously-issued access token in the header, and the endpoint will be able to validate the request given that access token.
279 | 
280 | The following function will fetch the user's home page and return the Microsub endpoint, or `false` if none was found.
281 | 
282 | ```php
283 | $url = IndieAuth\Client::normalizeMeURL($url);
284 | $microsubEndpoint = IndieAuth\Client::discoverMicrosubEndpoint($url);
285 | ```
286 | 
287 | The client may wish to discover all endpoints at the beginning, and cache the values in a session for later use.
288 | 
289 | #### Additional Endpoints
290 | 
291 | IndieAuth Server Metadata allows defining some additional endpoints:
292 | 
293 | **Token Revocation**
294 | 
295 | Return the `revocation_endpoint` or false if none was found:
296 | ```php
297 | $url = IndieAuth\Client::normalizeMeURL($url);
298 | $revocationEndpoint = IndieAuth\Client::discoverRevocationEndpoint($url);
299 | ```
300 | 
301 | **Token Introspection**
302 | 
303 | Return the `introspection_endpoint` or false if none was found:
304 | ```php
305 | $url = IndieAuth\Client::normalizeMeURL($url);
306 | $introspectionEndpoint = IndieAuth\Client::discoverIntrospectionEndpoint($url);
307 | ```
308 | 
309 | **Userinfo**
310 | 
311 | Return the `userinfo_endpoint` or false if none was found:
312 | ```php
313 | $url = IndieAuth\Client::normalizeMeURL($url);
314 | $userinfoEndpoint = IndieAuth\Client::discoverUserinfoEndpoint($url);
315 | ```
316 | 
317 | ### Building the authorization URL
318 | 
319 | Once the client has discovered the authorization server, it will need to build the authorization URL and direct the user's browser there.
320 | 
321 | For web sites, the client should send a 301 redirect to the authorization URL, or can open a new browser window. Native apps must launch a native browser window to the authorization URL and handle the redirect back to the native app appropriately.
322 | 
323 | #### Authorization Endpoint Parameters
324 | * `me` - the URL the user entered to begin the flow.
325 | * `redirect_uri` - where the authorization server should redirect after authorization is complete.
326 | * `client_id` - the full URL to a web page of the application. This is used by the authorization server to discover the app's name and icon, and to validate the redirect URI.
327 | * `state` - the "state" parameter can be whatever the client wishes, and must also be sent to the token endpoint when the client exchanges the authorization code for an access token.
328 | * `scope` - the "scope" value is a space-separated list of permissions the client is requesting.
329 | * `code_challenge` - for [PKCE](https://oauth.net/2/pkce/) support, this is the hashed version of a secret the client generates when it starts.
330 | * `code_challenge_method` - this library will always use S256 as the hash method.
331 | 
332 | The following function will build the authorization URL given all the required parameters. If the authorization endpoint contains a query string, this function handles merging the existing query string parameters with the new parameters.
333 | 
334 | The following scopes have special meaning to the authorization server and will request the user's full profile info instead of just verifying their profile URL:
335 | 
336 | * `profile`
337 | * `email`
338 | 
339 | ```php
340 | $url = IndieAuth\Client::normalizeMeURL($url);
341 | 
342 | $scope = 'profile create'; // Request profile info as well as an access token with the "create" scope
343 | 
344 | // These are two random strings. The helper methods in the library will use an available random number generaton depending on the PHP version.
345 | $_SESSION['state'] = IndieAuth\Client::generateStateParameter();
346 | $_SESSION['code_verifier'] = IndieAuth\Client::generatePKCECodeVerifier();
347 | 
348 | // you'll need to verify these later
349 | $_SESSION['user_entered_url'] = $url;
350 | $_SESSION['authorization_endpoint'] = $authorizationEndpoint;
351 | 
352 | $authorizationURL = IndieAuth\Client::buildAuthorizationURL($authorizationEndpoint, [
353 |   'me' => $url,
354 |   'redirect_uri' => $redirect_uri,
355 |   'client_id' => $client_id,
356 |   'scope' => $scope,
357 |   'state' => $_SESSION['state'],
358 |   'code_verifier' => $_SESSION['code_verifier'],
359 | ]);
360 | ```
361 | 
362 | Note: Your code should include the plaintext random code verifier, the `IndieAuth\Client` library will deal with hashing it for you in the request.
363 | 
364 | ### Getting authorization from the user
365 | 
366 | At this point, the authorization server interacts with the user, presenting them with a description of the request. This will look something like the following typical OAuth prompt:
367 | 
368 | ```
369 | An application, "Quill" is requesting access to your website, "aaronparecki.com"
370 | 
371 | This application would like to be able to
372 | * **create** new entries on your website
373 | 
374 | [ Approve ]   [ Deny ]
375 | ```
376 | 
377 | If the user approves the request, the authorization server will redirect back to the redirect URL specified, with the following parameters added to the query string:
378 | 
379 | * `code` - the authorization code
380 | * `state` - the state value provided in the request
381 | * `iss` - the issuer identifier for client validation
382 | 
383 | 
384 | ### Validate the Authorization Response
385 | 
386 | Next, the `state` and `iss` parameters must be verified to match the authorization request:
387 | 
388 | ```php
389 | $response = self::validateStateMatch($_GET, $_SESSION['indieauth_state']);
390 | if ($response instanceof IndieAuth\ErrorResponse) {
391 |   // handle the error response, array with keys `error` and `error_description`
392 |   die(json_encode($response->getArray()));
393 | }
394 | 
395 | if (isset($_SESSION['indieauth_issuer'])) {
396 |   $response = self::validateIssuerMatch($_GET, $_SESSION['indieauth_issuer']);
397 |   if ($response instanceof IndieAuth\ErrorResponse) {
398 |     // handle the error response, array with keys `error` and `error_description`
399 |     die(json_encode($response->getArray()));
400 |   }
401 | }
402 | ```
403 | 
404 | If both are valid, you can continue to exchange the authorization code.
405 | 
406 | 
407 | ### Exchanging the authorization code for profile info
408 | 
409 | If the client is not trying to get an access token, just trying to verify the user's URL, then it will need to exchange the authorization code for profile information at the authorization endpoint.
410 | 
411 | The following function will make a POST request to the authorization endpoint and parse the result.
412 | 
413 | ```php
414 | $response = IndieAuth\Client::exchangeAuthorizationCode($authorizationEndpoint, [
415 |   'code' => $_GET['code'],
416 |   'redirect_uri' => $redirect_uri,
417 |   'client_id' => $client_id,
418 |   'code_verifier' => $_SESSION['code_verifier'],
419 | ]);
420 | ```
421 | 
422 | The `$response` variable will include the response from the endpoint, such as the following:
423 | 
424 | ```php
425 | array(
426 |   'me' => 'https://aaronparecki.com/',
427 |   'response' => [
428 |     'me' => 'https://aaronparecki.com/',
429 |     'profile' => [
430 |       'name' => 'Aaron Parecki',
431 |       'url' => 'https://aaronparecki.com/',
432 |       'photo' => 'https://aaronparecki.com/images/profile.jpg'
433 |     ]
434 |   ],
435 |   'raw_response' => '{"me":"https://aaronparecki.com/","profile":{"name":"Aaron Parecki","url":"https://aaronparecki.com/","photo":"https://aaronparecki.com/images/profile.jpg"}}',
436 |   'response_code' => 200
437 | );
438 | ```
439 | 
440 | 
441 | ### Exchanging the authorization code for an access token
442 | 
443 | If the client requested any scopes beyond profile scopes and is expecting an access token, it needs to exchange the authorization code for an access token at the token endpoint.
444 | 
445 | To get an access token, the client makes a POST request to the token endpoint, passing in the authorization code as well as the following parameters:
446 | 
447 | * `code` - the authorization code obtained
448 | * `me` - the user's URL
449 | * `redirect_uri` - must match the redirect URI used in the request to obtain the authorization code
450 | * `client_id` - must match the client ID used in the initial request
451 | * `code_verifier` - if the client included a code challenge in the authorization request, then it must include the plaintext secret in the code exchange step here
452 | 
453 | The following function will make a POST request to the token endpoint and parse the result.
454 | 
455 | ```php
456 | $response = IndieAuth\Client::exchangeAuthorizationCode($tokenEndpoint, [
457 |   'code' => $_GET['code'],
458 |   'redirect_uri' => $redirect_uri,
459 |   'client_id' => $client_id,
460 |   'code_verifier' => $_SESSION['code_verifier'],
461 | ]);
462 | ```
463 | 
464 | The `$response` variable will include the response from the token endpoint, such as the following:
465 | 
466 | ```php
467 | array(
468 |   'response' => [
469 |     'me' => 'https://aaronparecki.com/',
470 |     'access_token' => 'xxxxxxxxx',
471 |     'scope' => 'create'
472 |   ],
473 |   'raw_response' => '{"me":"https://aaronparecki.com/","access_token":"xxxxxxxxx","scope":"create"}',
474 |   'response_code' => 200
475 | );
476 | ```
477 | 
478 | 
479 | ### Verifying the Authorization Server
480 | 
481 | If you are using the individual methods instead of the begin/complete wrapper, then you'll need to double check that the URL returned has the same authorization endpoint as the one you used to begin the flow.
482 | 
483 | ```php
484 | if($response['me'] != $_SESSION['user_entered_url']) {
485 |   $authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($response['me']);
486 |   if($authorizationEndpoint != $_SESSION['authorization_endpoint']) {
487 |     die("The authorization endpoint at the profile URL is not the same as the one used to begin the flow!");
488 |   }
489 | }
490 | ```
491 | 
492 | 
493 | ### Making API requests
494 | 
495 | At this point, you are done using the IndieAuth client library and can begin making API requests directly to the user's website and micropub endpoint.
496 | 
497 | To make an API request, include the access token in an HTTP "Authorization" header like the following:
498 | 
499 | ```
500 | Authorization: Bearer xxxxxxxx
501 | ```
502 | 
503 | ### Additional Settings
504 | 
505 | There are a couple settings you can update if necessary:
506 | 
507 | **HTTP User Agent**
508 | 
509 | The default UA mimics a browser by default. You can customize this by calling:
510 | 
511 | ```php
512 | IndieAuth\Client::$http->set_user_agent('Your User Agent String');
513 | ```
514 | 
515 | **Number of bytes in state parameter**
516 | 
517 | The default state parameter is generated with 8 random bytes. You can change the number of bytes by calling:
518 | 
519 | ```php
520 | IndieAuth\Client::$random_byte_count = 16;
521 | ```
522 | 
523 | 
524 | # License
525 | 
526 | Copyright 2013-2022 by Aaron Parecki and contributors
527 | 
528 | Available under the MIT and Apache 2.0 licenses. See LICENSE.txt
529 | 


--------------------------------------------------------------------------------
/src/IndieAuth/Client.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | 
  3 | namespace IndieAuth;
  4 | 
  5 | class Client {
  6 |   const VERSION = '1.1.6';
  7 | 
  8 |   private static $_headers = array();
  9 |   private static $_body = array();
 10 |   private static $_parsed = null;
 11 |   private static $_parsedHash = null;
 12 |   private static $_metadata_body = array();
 13 |   private static $_metadata = null;
 14 | 
 15 |   public static $http;
 16 | 
 17 |   public static $clientID;
 18 |   public static $redirectURL;
 19 |   public static $random_byte_count = 8;
 20 | 
 21 |   // Handles everything you need to start the authorization process.
 22 |   // Discovers the user's auth endpoints, generates and stores a state in the session.
 23 |   // Returns an authorization URL or an error array.
 24 |   // Note: the third parameter $authorizationEndpoint is a nonstandard parameter only used
 25 |   // when this client is used with services like indielogin.com
 26 |   public static function begin($url, $scope=false, $authorizationEndpoint=false) {
 27 |     if(!isset(self::$clientID) || !isset(self::$redirectURL)) {
 28 |       return self::_errorResponse('not_configured', 'Before you can begin, you need to configure the clientID and redirectURL of the IndieAuth client');
 29 |     }
 30 | 
 31 |     $errorCode = false;
 32 | 
 33 |     $url = self::normalizeMeURL($url);
 34 | 
 35 |     $_SESSION['indieauth_entered_url'] = $url;
 36 | 
 37 |     if(!$url) {
 38 |       return self::_errorResponse('invalid_url', 'The URL provided was invalid');
 39 |     }
 40 | 
 41 |     $metadataEndpoint = self::discoverMetadataEndpoint($url);
 42 |     if ($metadataEndpoint) {
 43 |       $response = self::discoverIssuer($metadataEndpoint);
 44 |       if ($response instanceof ErrorResponse) {
 45 |         return $response->getArray();
 46 |       }
 47 | 
 48 |       $_SESSION['indieauth_issuer'] = $response;
 49 |     }
 50 | 
 51 |     if(!$authorizationEndpoint) {
 52 |       $authorizationEndpoint = static::discoverAuthorizationEndpoint($url);
 53 |     }
 54 | 
 55 |     if(!$authorizationEndpoint) {
 56 |       return self::_errorResponse('missing_authorization_endpoint', 'Could not find your authorization endpoint');
 57 |     }
 58 | 
 59 |     $scopes = self::parseNonProfileScopes($scope);
 60 |     if(count($scopes)) {
 61 |       $tokenEndpoint = static::discoverTokenEndpoint($url);
 62 | 
 63 |       if(!$tokenEndpoint) {
 64 |         return self::_errorResponse('missing_token_endpoint', 'Could not find your token endpoint. The token endpoint is required when requesting non-profile scopes');
 65 |       }
 66 |     }
 67 | 
 68 |     $state = self::generateStateParameter();
 69 |     $codeVerifier = self::generatePKCECodeVerifier();
 70 | 
 71 |     $_SESSION['indieauth_state'] = $state;
 72 |     $_SESSION['indieauth_code_verifier'] = $codeVerifier;
 73 |     $_SESSION['indieauth_authorization_endpoint'] = $authorizationEndpoint;
 74 |     if(isset($tokenEndpoint))
 75 |       $_SESSION['indieauth_token_endpoint'] = $tokenEndpoint;
 76 | 
 77 |     $authorizationURL = self::buildAuthorizationURL($authorizationEndpoint, [
 78 |       'me' => $url,
 79 |       'redirect_uri' => self::$redirectURL,
 80 |       'client_id' => self::$clientID,
 81 |       'state' => $state,
 82 |       'code_verifier' => $codeVerifier,
 83 |       'scope' => $scope,
 84 |     ]);
 85 | 
 86 |     return [$authorizationURL, false];
 87 |   }
 88 | 
 89 |   public static function complete($params) {
 90 |     $requiredSessionKeys = ['indieauth_entered_url', 'indieauth_state', 'indieauth_authorization_endpoint'];
 91 |     foreach($requiredSessionKeys as $key) {
 92 |       if(!isset($_SESSION[$key])) {
 93 |         return self::_errorResponse('invalid_session',
 94 |           'The session was missing data. Ensure that you are initializing the session before using this library');
 95 |       }
 96 |     }
 97 | 
 98 |     if(isset($params['error'])) {
 99 |       return self::_errorResponse($params['error'], isset($params['error_description']) ? $params['error_description'] : '');
100 |     }
101 | 
102 |     if(!isset($params['code'])) {
103 |       return self::_errorResponse('invalid_response',
104 |         'The response from the authorization server did not return an authorization code or error information');
105 |     }
106 | 
107 |     $response = self::validateStateMatch($params, $_SESSION['indieauth_state']);
108 |     if ($response instanceof ErrorResponse) {
109 |       return $response->getArray();
110 |     }
111 | 
112 |     if (isset($_SESSION['indieauth_issuer'])) {
113 |       $response = self::validateIssuerMatch($params, $_SESSION['indieauth_issuer']);
114 |       if ($response instanceof ErrorResponse) {
115 |         return $response->getArray();
116 |       }
117 |     }
118 | 
119 |     if(isset($_SESSION['indieauth_token_endpoint'])) {
120 |       $data = self::exchangeAuthorizationCode($_SESSION['indieauth_token_endpoint'], [
121 |         'code' => $params['code'],
122 |         'redirect_uri' => self::$redirectURL,
123 |         'client_id' => self::$clientID,
124 |         'code_verifier' => $_SESSION['indieauth_code_verifier'],
125 |       ]);
126 |     } else {
127 |       $data = self::exchangeAuthorizationCode($_SESSION['indieauth_authorization_endpoint'], [
128 |         'code' => $params['code'],
129 |         'redirect_uri' => self::$redirectURL,
130 |         'client_id' => self::$clientID,
131 |         'code_verifier' => $_SESSION['indieauth_code_verifier'],
132 |       ]);
133 |     }
134 | 
135 |     if(!isset($data['response']['me'])) {
136 |       $error = 'indieauth_error';
137 |       if(!empty($data['response_details']['error']))
138 |         $error = $data['response_details']['error'];
139 |       elseif(!empty($data['response']['error']))
140 |         $error = $data['response']['error'];
141 | 
142 |       $error_description = 'The authorization server did not return a valid response';
143 |       if(!empty($data['response_details']['error_description']))
144 |         $error_description = $data['response_details']['error_description'];
145 |       elseif(!empty($data['response']['error_description']))
146 |         $error_description = $data['response']['error_description'];
147 | 
148 |       return self::_errorResponse($error, $error_description, $data);
149 |     }
150 | 
151 |     // If the returned "me" is not the same as the entered "me", check that the authorization endpoint linked to
152 |     // by the returned URL is the same as the one used
153 |     if($_SESSION['indieauth_entered_url'] != $data['response']['me']) {
154 |       // Discover and populate metadata if the returned "me" has a metadata endpoint
155 |       $metadataEndpoint = self::discoverMetadataEndpoint($data['response']['me']);
156 | 
157 |       // Go find the authorization endpoint that the returned "me" URL declares
158 |       $authorizationEndpoint = static::discoverAuthorizationEndpoint($data['response']['me']);
159 | 
160 |       if($authorizationEndpoint != $_SESSION['indieauth_authorization_endpoint']) {
161 |         return self::_errorResponse('invalid_authorization_endpoint',
162 |           'The authorization server of the returned profile URL did not match the initial authorization server', $data);
163 |       }
164 |     }
165 | 
166 |     $data['me'] = self::normalizeMeURL($data['response']['me']);
167 | 
168 |     self::_clearSessionData();
169 | 
170 |     return [$data, false];
171 |   }
172 | 
173 |   /**
174 |    * Wrapper to create an ErrorResponse and return the array
175 |    * @return array
176 |    */
177 |   private static function _errorResponse($error_code, $description, $debug = null) {
178 |     self::_clearSessionData();
179 |     $error = new ErrorResponse($error_code, $description, $debug);
180 |     return $error->getArray();
181 |   }
182 | 
183 |   private static function _clearSessionData() {
184 |     unset($_SESSION['indieauth_entered_url']);
185 |     unset($_SESSION['indieauth_state']);
186 |     unset($_SESSION['indieauth_code_verifier']);
187 |     unset($_SESSION['indieauth_authorization_endpoint']);
188 |     unset($_SESSION['indieauth_token_endpoint']);
189 |     unset($_SESSION['indieauth_issuer']);
190 |   }
191 | 
192 |   public static function setUpHTTP() {
193 |     // Unfortunately I've seen a bunch of websites return different content when the user agent is set to something like curl or other server-side libraries, so we have to pretend to be a browser to successfully get the real HTML
194 |     if(!isset(self::$http)) {
195 |       self::$http = new \p3k\HTTP();
196 |       self::$http->set_user_agent('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36 indieauth-client/' . self::VERSION);
197 |       self::$http->_timeout = 10;
198 |       // You can customize the user agent for your application by calling
199 |       // IndieAuth\Client::$http->set_user_agent('Your User Agent String');
200 |     }
201 |   }
202 | 
203 |   private static function _urlIsValid($url) {
204 |     $url = parse_url($url);
205 | 
206 |     if($url == false
207 |       || !array_key_exists('scheme', $url)
208 |       || !in_array($url['scheme'], array('http','https'))
209 |       || !array_key_exists('host', $url)
210 |     ) {
211 |       // Invalid url
212 |       return false;
213 |     }
214 | 
215 |     return true;
216 |   }
217 | 
218 |   /**
219 |    * @see https://indieauth.spec.indieweb.org/#indieauth-server-metadata
220 |    */
221 |   private static function _isIssuerValid($issuer, $metadata_endpoint) {
222 |     $issuer = self::normalizeMeURL($issuer);
223 |     if (!$issuer) {
224 |       return false;
225 |     }
226 | 
227 |     $parts = parse_url($issuer);
228 | 
229 |     if (!array_key_exists('scheme', $parts) || $parts['scheme'] != 'https') {
230 |       return false;
231 |     }
232 | 
233 |     if (array_key_exists('query', $parts) || array_key_exists('fragment', $parts)) {
234 |       return false;
235 |     }
236 | 
237 |     $metadata_endpoint = self::normalizeMeURL($metadata_endpoint);
238 | 
239 |     if (strpos($metadata_endpoint, $issuer) !== 0) {
240 |       return false;
241 |     }
242 | 
243 |     return true;
244 |   }
245 | 
246 |   private static function _fetchHead($url) {
247 |     self::setUpHTTP();
248 | 
249 |     if(array_key_exists($url, self::$_headers)) {
250 |       return self::$_headers[$url];
251 |     } else {
252 |       $headers = self::$http->head($url);
253 |       self::$_headers[$url] = $headers['header'];
254 |       return self::$_headers[$url];
255 |     }
256 |   }
257 | 
258 |   private static function _fetchBody($url) {
259 |     self::setUpHTTP();
260 | 
261 |     if(array_key_exists($url, self::$_body)) {
262 |       return self::$_body[$url];
263 |     } else {
264 |       $response = self::$http->get($url);
265 |       self::$_body[$url] = $response['body'];
266 |       return self::$_body[$url];
267 |     }
268 |   }
269 | 
270 |   private static function _fetchMetadata($url) {
271 |     self::setUpHTTP();
272 | 
273 |     if(array_key_exists($url, self::$_metadata_body)) {
274 |       return self::$_metadata_body[$url];
275 |     } else {
276 |       $response = self::$http->get($url);
277 |       self::setMetadata($url, $response['body']);
278 |       return self::$_metadata_body[$url];
279 |     }
280 |   }
281 | 
282 |   private static function resetMetadata() {
283 |     self::$_metadata_body = array();
284 |     self::$_metadata = null;
285 |   }
286 | 
287 |   /**
288 |    * Set metadata body
289 |    * $body is expected to be JSON and will attempt
290 |    * to decode to array in self::$_metadata
291 |    */
292 |   public static function setMetadata($url, $body) {
293 |     self::resetMetadata();
294 | 
295 |     self::$_metadata_body[$url] = $body;
296 |     $metadata_array = json_decode($body, true);
297 |     if (!is_null($metadata_array)) {
298 |       self::$_metadata = $metadata_array;
299 |     }
300 |   }
301 | 
302 |   public static function getMetadata() {
303 |     return self::$_metadata;
304 |   }
305 | 
306 |   private static function _discoverEndpoint($url, $name) {
307 |     if(!self::_urlIsValid($url)) {
308 |       return null;
309 |     }
310 | 
311 |     // First check the parsed metadata for the endpoint
312 |     if ($endpoint = self::_discoverFromMetadata($name)) {
313 |       return $endpoint;
314 |     }
315 | 
316 |     // If not found, check the HTTP headers for the endpoint
317 |     $headerString = self::_fetchHead($url);
318 | 
319 |     if($endpoint = self::_extractEndpointFromHeaders($headerString, $url, $name)) {
320 |       return $endpoint;
321 |     }
322 | 
323 |     // If not found, check the body for a rel value
324 |     $html = self::_fetchBody($url);
325 | 
326 |     return self::_extractEndpointFromHTML($html, $url, $name);
327 |   }
328 | 
329 |   private static function _discoverFromMetadata($name) {
330 |     if (!self::$_metadata) {
331 |       return null;
332 |     }
333 | 
334 |     if (array_key_exists($name, self::$_metadata)) {
335 |       return self::$_metadata[$name];
336 |     }
337 | 
338 |     return null;
339 |   }
340 | 
341 |   private static function _extractEndpointFromHeaders($headerString, $url, $name) {
342 |     $headers = \IndieWeb\http_rels($headerString);
343 | 
344 |     if(isset($headers[$name][0])) {
345 |       return \Mf2\resolveUrl($url, $headers[$name][0]);
346 |     }
347 | 
348 |     return false;
349 |   }
350 | 
351 |   private static function _extractEndpointFromHTML($html, $url, $name) {
352 |     if(self::$_parsedHash != ($h=md5($html))) {
353 |       $parser = new \Mf2\Parser($html);
354 |       $parser->enableAlternates = true;
355 |       self::$_parsed = $parser->parse();
356 |       self::$_parsedHash = $h;
357 |     }
358 | 
359 |     if(isset(self::$_parsed['rels'][$name][0])) {
360 |       return \Mf2\resolveUrl($url, self::$_parsed['rels'][$name][0]);
361 |     }
362 | 
363 |     return false;
364 |   }
365 | 
366 |   public static function discoverMetadataEndpoint($url) {
367 |     if ($endpoint = self::_discoverEndpoint($url, 'indieauth-metadata')) {
368 |       self::_fetchMetadata($endpoint);
369 |     }
370 | 
371 |     return $endpoint;
372 |   }
373 | 
374 |   /**
375 |    * @param string $metadataEndpoint
376 |    * @return IndieAuth\ErrorResponse if error, string of `issuer` if valid
377 |    */
378 |   public static function discoverIssuer($metadataEndpoint) {
379 |     $issuer = self::_discoverFromMetadata('issuer');
380 |     if (!$issuer) {
381 |       return new ErrorResponse('invalid_issuer', 'No issuer found in metadata endpoint');
382 |     }
383 | 
384 |     if (!(self::_isIssuerValid($issuer, $metadataEndpoint))) {
385 |       return new ErrorResponse('invalid_issuer', 'Issuer in metadata endpoint is not valid');
386 |     }
387 | 
388 |     return $issuer;
389 |   }
390 | 
391 |   public static function discoverAuthorizationEndpoint($url) {
392 |     return self::_discoverEndpoint($url, 'authorization_endpoint');
393 |   }
394 | 
395 |   public static function discoverTokenEndpoint($url) {
396 |     return self::_discoverEndpoint($url, 'token_endpoint');
397 |   }
398 | 
399 |   public static function discoverRevocationEndpoint($url) {
400 |     return self::_discoverEndpoint($url, 'revocation_endpoint');
401 |   }
402 | 
403 |   public static function discoverIntrospectionEndpoint($url) {
404 |     return self::_discoverEndpoint($url, 'introspection_endpoint');
405 |   }
406 | 
407 |   public static function discoverUserinfoEndpoint($url) {
408 |     return self::_discoverEndpoint($url, 'userinfo_endpoint');
409 |   }
410 | 
411 |   public static function discoverMicropubEndpoint($url) {
412 |     return self::_discoverEndpoint($url, 'micropub');
413 |   }
414 | 
415 |   public static function discoverMicrosubEndpoint($url) {
416 |     return self::_discoverEndpoint($url, 'microsub');
417 |   }
418 | 
419 |   // Build the authorization URL for the given url and endpoint
420 |   public static function buildAuthorizationURL($authorizationEndpoint, $params) {
421 |     $required = ['me', 'redirect_uri', 'client_id', 'state'];
422 |     foreach($required as $r) {
423 |       if(!isset($params[$r])) {
424 |         throw new \Exception('Missing parameter to buildAuthorizationURL: '.$r);
425 |       }
426 |     }
427 | 
428 |     $url = parse_url($authorizationEndpoint);
429 | 
430 |     $request = array();
431 |     if(array_key_exists('query', $url)) {
432 |       parse_str($url['query'], $request);
433 |     }
434 | 
435 |     $request['response_type'] = 'code';
436 |     $request['me'] = $params['me'];
437 |     $request['redirect_uri'] = $params['redirect_uri'];
438 |     $request['client_id'] = $params['client_id'];
439 |     $request['state'] = $params['state'];
440 |     if(!empty($params['scope'])) {
441 |       $request['scope'] = $params['scope'];
442 |     }
443 |     if(isset($params['code_verifier'])) {
444 |       $request['code_challenge'] = self::generatePKCECodeChallenge($params['code_verifier']);
445 |       $request['code_challenge_method'] = 'S256';
446 |     }
447 | 
448 |     $url['query'] = http_build_query($request);
449 | 
450 |     return self::build_url($url);
451 |   }
452 | 
453 |   // Input: Any URL or string like "aaronparecki.com"
454 |   // Output: Normlized URL (default to http if no scheme, default "/" path)
455 |   //         or return false if not a valid IndieAuth URL (has a fragment)
456 |   public static function normalizeMeURL($url) {
457 |     $me = parse_url($url);
458 | 
459 |     if(array_key_exists('path', $me) && $me['path'] == '')
460 |       return false;
461 | 
462 |     // parse_url returns just "path" for naked domains, so
463 |     // move that into the "host" instead
464 |     if(count($me) == 1 && array_key_exists('path', $me)) {
465 |       if(preg_match('/([^\/]+)(\/.+)/', $me['path'], $match)) {
466 |         $me['host'] = $match[1];
467 |         $me['path'] = $match[2];
468 |       } else {
469 |         $me['host'] = $me['path'];
470 |         unset($me['path']);
471 |       }
472 |     }
473 | 
474 |     if(!array_key_exists('scheme', $me))
475 |       $me['scheme'] = 'http';
476 | 
477 |     if(!array_key_exists('path', $me))
478 |       $me['path'] = '/';
479 | 
480 |     // Invalid scheme
481 |     if(!in_array($me['scheme'], array('http','https')))
482 |       return false;
483 | 
484 |     // fragment not allowed
485 |     if(array_key_exists('fragment', $me))
486 |       return false;
487 | 
488 |     return self::build_url($me);
489 |   }
490 | 
491 |   public static function build_url($parsed_url) {
492 |     $scheme   = isset($parsed_url['scheme']) ? strtolower($parsed_url['scheme']) . '://' : '';
493 |     $host     = isset($parsed_url['host']) ? strtolower($parsed_url['host']) : '';
494 |     $port     = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
495 |     $user     = isset($parsed_url['user']) ? $parsed_url['user'] : '';
496 |     $pass     = isset($parsed_url['pass']) ? ':' . $parsed_url['pass']  : '';
497 |     $pass     = ($user || $pass) ? "$pass@" : '';
498 |     $path     = isset($parsed_url['path']) ? $parsed_url['path'] : '';
499 |     $query    = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
500 |     $fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
501 |     return "$scheme$user$pass$host$port$path$query$fragment";
502 |   }
503 | 
504 |   public static function parseNonProfileScopes($scope) {
505 |     $scopes = explode(' ', $scope);
506 |     return array_filter(array_diff($scopes, ['profile','email']));
507 |   }
508 | 
509 |   /**
510 |    * @param array $params
511 |    * @param string $expected_state
512 |    * @return IndieAuth\ErrorResponse if error, void (null) if valid
513 |    */
514 |   public static function validateStateMatch($params, $expected_state = '') {
515 |     if (!isset($params['state'])) {
516 |       return new ErrorResponse('missing_state', 'The authorization server did not return the state parameter');
517 |     }
518 | 
519 |     if ($params['state'] !== $expected_state) {
520 |       return new ErrorResponse('invalid_state', 'The authorization server returned an invalid state parameter');
521 |     }
522 |   }
523 | 
524 |   /**
525 |    * @param array $params
526 |    * @param string $expected_issuer
527 |    * @return IndieAuth\ErrorResponse if error, void (null) if valid
528 |    */
529 |   public static function validateIssuerMatch($params, $expected_issuer = '') {
530 |     if (!$expected_issuer) {
531 |       return;
532 |     }
533 | 
534 |     if (!isset($params['iss'])) {
535 |       return new ErrorResponse('missing_iss', 'The authorization server did not return the iss parameter');
536 |     }
537 | 
538 |     if (self::normalizeMeURL($params['iss']) !== self::normalizeMeURL($expected_issuer)) {
539 |       return new ErrorResponse('invalid_iss', 'The authorization server returned an invalid iss parameter');
540 |     }
541 |   }
542 | 
543 |   public static function exchangeAuthorizationCode($endpoint, $params) {
544 |     $required = ['code', 'redirect_uri', 'client_id'];
545 |     foreach($required as $r) {
546 |       if(!isset($params[$r])) {
547 |         throw new \Exception('Missing parameter to exchangeAuthorizationCode: '.$r);
548 |       }
549 |     }
550 | 
551 |     self::setUpHTTP();
552 | 
553 |     $request = [
554 |       'grant_type' => 'authorization_code',
555 |       'code' => $params['code'],
556 |       'redirect_uri' => $params['redirect_uri'],
557 |       'client_id' => $params['client_id'],
558 |     ];
559 |     if(isset($params['code_verifier'])) {
560 |       $request['code_verifier'] = $params['code_verifier'];
561 |     }
562 | 
563 |     $response = self::$http->post($endpoint, http_build_query($request), [
564 |       'Accept: application/json, application/x-www-form-urlencoded;q=0.8'
565 |     ]);
566 | 
567 |     $data = json_decode($response['body'], true);
568 |     if(!$data) {
569 |       // Parse as form-encoded for legacy server support
570 |       $data = array();
571 |       parse_str($response['body'], $data);
572 |     }
573 | 
574 |     return [
575 |       'response' => $data,
576 |       'raw_response' => $response['body'],
577 |       'response_code' => $response['code'],
578 |       'response_details' => $response,
579 |     ];
580 |   }
581 | 
582 |   public static function representativeHCard($url) {
583 |     $html = self::_fetchBody($url);
584 |     $parsed = \Mf2\parse($html, $url);
585 |     return \Mf2\HCard\representative($parsed, $url);
586 |   }
587 | 
588 |   // Support legacy PHP random string generation methods
589 |   private static function generateRandomString($numBytes) {
590 |     if(function_exists('random_bytes')) {
591 |       $bytes = random_bytes($numBytes);
592 |     } elseif(function_exists('openssl_random_pseudo_bytes')){
593 |       $bytes = openssl_random_pseudo_bytes($numBytes);
594 |     } else {
595 |       $bytes = '';
596 |       for($i=0, $bytes=''; $i < $numBytes; $i++) {
597 |         $bytes .= chr(mt_rand(0, 255));
598 |       }
599 |     }
600 |     return bin2hex($bytes);
601 |   }
602 | 
603 |   // Optional helper method to generate a state parameter. You can just as easily do this yourself some other way.
604 |   public static function generateStateParameter() {
605 |     return self::generateRandomString(self:: $random_byte_count);
606 |   }
607 | 
608 |   /** PKCE Helpers **/
609 | 
610 |   public static function generatePKCECodeVerifier() {
611 |     return self::generateRandomString(32);
612 |   }
613 | 
614 |   private static function generatePKCECodeChallenge($plaintext) {
615 |     return self::base64_urlencode(hash('sha256', $plaintext, true));
616 |   }
617 | 
618 |   private static function base64_urlencode($string) {
619 |     return rtrim(strtr(base64_encode($string), '+/', '-_'), '=');
620 |   }
621 | 
622 | }
623 | 
624 | 


--------------------------------------------------------------------------------
/composer.lock:
--------------------------------------------------------------------------------
   1 | {
   2 |     "_readme": [
   3 |         "This file locks the dependencies of your project to a known state",
   4 |         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
   5 |         "This file is @generated automatically"
   6 |     ],
   7 |     "content-hash": "1d221f852b9b766467b14242355a1296",
   8 |     "packages": [
   9 |         {
  10 |             "name": "indieweb/link-rel-parser",
  11 |             "version": "0.1.3",
  12 |             "source": {
  13 |                 "type": "git",
  14 |                 "url": "https://github.com/indieweb/link-rel-parser-php.git",
  15 |                 "reference": "295420e4f16d9a9d262a3c25a7a583794428f055"
  16 |             },
  17 |             "dist": {
  18 |                 "type": "zip",
  19 |                 "url": "https://api.github.com/repos/indieweb/link-rel-parser-php/zipball/295420e4f16d9a9d262a3c25a7a583794428f055",
  20 |                 "reference": "295420e4f16d9a9d262a3c25a7a583794428f055",
  21 |                 "shasum": ""
  22 |             },
  23 |             "require": {
  24 |                 "php": ">=5.3.0"
  25 |             },
  26 |             "type": "library",
  27 |             "autoload": {
  28 |                 "files": [
  29 |                     "src/IndieWeb/link_rel_parser.php"
  30 |                 ]
  31 |             },
  32 |             "notification-url": "https://packagist.org/downloads/",
  33 |             "license": [
  34 |                 "Apache-2.0"
  35 |             ],
  36 |             "authors": [
  37 |                 {
  38 |                     "name": "Aaron Parecki",
  39 |                     "homepage": "http://aaronparecki.com"
  40 |                 },
  41 |                 {
  42 |                     "name": "Tantek Çelik",
  43 |                     "homepage": "http://tantek.com"
  44 |                 }
  45 |             ],
  46 |             "description": "Parse rel values from HTTP headers",
  47 |             "homepage": "https://github.com/indieweb/link-rel-parser-php",
  48 |             "keywords": [
  49 |                 "http",
  50 |                 "indieweb",
  51 |                 "microformats2"
  52 |             ],
  53 |             "support": {
  54 |                 "issues": "https://github.com/indieweb/link-rel-parser-php/issues",
  55 |                 "source": "https://github.com/indieweb/link-rel-parser-php/tree/master"
  56 |             },
  57 |             "time": "2017-01-11T17:14:49+00:00"
  58 |         },
  59 |         {
  60 |             "name": "indieweb/representative-h-card",
  61 |             "version": "0.1.2",
  62 |             "source": {
  63 |                 "type": "git",
  64 |                 "url": "https://github.com/indieweb/representative-h-card-php.git",
  65 |                 "reference": "b70b01bd0dd7f2a940602137335dbf46ab6e2e38"
  66 |             },
  67 |             "dist": {
  68 |                 "type": "zip",
  69 |                 "url": "https://api.github.com/repos/indieweb/representative-h-card-php/zipball/b70b01bd0dd7f2a940602137335dbf46ab6e2e38",
  70 |                 "reference": "b70b01bd0dd7f2a940602137335dbf46ab6e2e38",
  71 |                 "shasum": ""
  72 |             },
  73 |             "require": {
  74 |                 "php": ">=5.4"
  75 |             },
  76 |             "require-dev": {
  77 |                 "mf2/mf2": "0.2.*",
  78 |                 "phpunit/phpunit": "*"
  79 |             },
  80 |             "type": "library",
  81 |             "autoload": {
  82 |                 "files": [
  83 |                     "src/mf2/representative-h-card.php"
  84 |                 ]
  85 |             },
  86 |             "notification-url": "https://packagist.org/downloads/",
  87 |             "license": [
  88 |                 "Apache-2.0"
  89 |             ],
  90 |             "authors": [
  91 |                 {
  92 |                     "name": "Aaron Parecki",
  93 |                     "homepage": "http://aaronparecki.com"
  94 |                 }
  95 |             ],
  96 |             "keywords": [
  97 |                 "h-card",
  98 |                 "indieweb",
  99 |                 "mf2",
 100 |                 "microformats"
 101 |             ],
 102 |             "support": {
 103 |                 "issues": "https://github.com/indieweb/representative-h-card-php/issues",
 104 |                 "source": "https://github.com/indieweb/representative-h-card-php/tree/0.1.2"
 105 |             },
 106 |             "time": "2015-12-23T18:11:19+00:00"
 107 |         },
 108 |         {
 109 |             "name": "mf2/mf2",
 110 |             "version": "v0.5.0",
 111 |             "source": {
 112 |                 "type": "git",
 113 |                 "url": "https://github.com/microformats/php-mf2.git",
 114 |                 "reference": "ddc56de6be62ed4a21f569de9b80e17af678ca50"
 115 |             },
 116 |             "dist": {
 117 |                 "type": "zip",
 118 |                 "url": "https://api.github.com/repos/microformats/php-mf2/zipball/ddc56de6be62ed4a21f569de9b80e17af678ca50",
 119 |                 "reference": "ddc56de6be62ed4a21f569de9b80e17af678ca50",
 120 |                 "shasum": ""
 121 |             },
 122 |             "require": {
 123 |                 "php": ">=5.6.0"
 124 |             },
 125 |             "require-dev": {
 126 |                 "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
 127 |                 "mf2/tests": "dev-master#e9e2b905821ba0a5b59dab1a8eaf40634ce9cd49",
 128 |                 "phpcompatibility/php-compatibility": "^9.3",
 129 |                 "phpunit/phpunit": "^5.7",
 130 |                 "squizlabs/php_codesniffer": "^3.6.2"
 131 |             },
 132 |             "suggest": {
 133 |                 "barnabywalters/mf-cleaner": "To more easily handle the canonical data php-mf2 gives you",
 134 |                 "masterminds/html5": "Alternative HTML parser for PHP, for better HTML5 support."
 135 |             },
 136 |             "bin": [
 137 |                 "bin/fetch-mf2",
 138 |                 "bin/parse-mf2"
 139 |             ],
 140 |             "type": "library",
 141 |             "autoload": {
 142 |                 "files": [
 143 |                     "Mf2/Parser.php"
 144 |                 ]
 145 |             },
 146 |             "notification-url": "https://packagist.org/downloads/",
 147 |             "license": [
 148 |                 "CC0-1.0"
 149 |             ],
 150 |             "authors": [
 151 |                 {
 152 |                     "name": "Barnaby Walters",
 153 |                     "homepage": "http://waterpigs.co.uk"
 154 |                 }
 155 |             ],
 156 |             "description": "A pure, generic microformats2 parser — makes HTML as easy to consume as a JSON API",
 157 |             "keywords": [
 158 |                 "html",
 159 |                 "microformats",
 160 |                 "microformats 2",
 161 |                 "parser",
 162 |                 "semantic"
 163 |             ],
 164 |             "support": {
 165 |                 "issues": "https://github.com/microformats/php-mf2/issues",
 166 |                 "source": "https://github.com/microformats/php-mf2/tree/v0.5.0"
 167 |             },
 168 |             "time": "2022-02-10T01:05:27+00:00"
 169 |         },
 170 |         {
 171 |             "name": "p3k/http",
 172 |             "version": "0.1.12",
 173 |             "source": {
 174 |                 "type": "git",
 175 |                 "url": "https://github.com/aaronpk/p3k-http.git",
 176 |                 "reference": "cf9c5b7cdbe1800bfb9587a20953ed8d20322e0b"
 177 |             },
 178 |             "dist": {
 179 |                 "type": "zip",
 180 |                 "url": "https://api.github.com/repos/aaronpk/p3k-http/zipball/cf9c5b7cdbe1800bfb9587a20953ed8d20322e0b",
 181 |                 "reference": "cf9c5b7cdbe1800bfb9587a20953ed8d20322e0b",
 182 |                 "shasum": ""
 183 |             },
 184 |             "require": {
 185 |                 "indieweb/link-rel-parser": "0.1.*",
 186 |                 "mf2/mf2": ">=0.3.2"
 187 |             },
 188 |             "type": "library",
 189 |             "autoload": {
 190 |                 "psr-4": {
 191 |                     "p3k\\": "src/p3k"
 192 |                 }
 193 |             },
 194 |             "notification-url": "https://packagist.org/downloads/",
 195 |             "license": [
 196 |                 "MIT"
 197 |             ],
 198 |             "authors": [
 199 |                 {
 200 |                     "name": "Aaron Parecki",
 201 |                     "homepage": "https://aaronparecki.com"
 202 |                 }
 203 |             ],
 204 |             "description": "A simple wrapper API around the PHP curl functions",
 205 |             "homepage": "https://github.com/aaronpk/p3k-http",
 206 |             "support": {
 207 |                 "issues": "https://github.com/aaronpk/p3k-http/issues",
 208 |                 "source": "https://github.com/aaronpk/p3k-http/tree/0.1.12"
 209 |             },
 210 |             "time": "2021-10-12T14:12:29+00:00"
 211 |         }
 212 |     ],
 213 |     "packages-dev": [
 214 |         {
 215 |             "name": "doctrine/instantiator",
 216 |             "version": "1.4.1",
 217 |             "source": {
 218 |                 "type": "git",
 219 |                 "url": "https://github.com/doctrine/instantiator.git",
 220 |                 "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc"
 221 |             },
 222 |             "dist": {
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 224 |                 "url": "https://api.github.com/repos/doctrine/instantiator/zipball/10dcfce151b967d20fde1b34ae6640712c3891bc",
 225 |                 "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc",
 226 |                 "shasum": ""
 227 |             },
 228 |             "require": {
 229 |                 "php": "^7.1 || ^8.0"
 230 |             },
 231 |             "require-dev": {
 232 |                 "doctrine/coding-standard": "^9",
 233 |                 "ext-pdo": "*",
 234 |                 "ext-phar": "*",
 235 |                 "phpbench/phpbench": "^0.16 || ^1",
 236 |                 "phpstan/phpstan": "^1.4",
 237 |                 "phpstan/phpstan-phpunit": "^1",
 238 |                 "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
 239 |                 "vimeo/psalm": "^4.22"
 240 |             },
 241 |             "type": "library",
 242 |             "autoload": {
 243 |                 "psr-4": {
 244 |                     "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
 245 |                 }
 246 |             },
 247 |             "notification-url": "https://packagist.org/downloads/",
 248 |             "license": [
 249 |                 "MIT"
 250 |             ],
 251 |             "authors": [
 252 |                 {
 253 |                     "name": "Marco Pivetta",
 254 |                     "email": "ocramius@gmail.com",
 255 |                     "homepage": "https://ocramius.github.io/"
 256 |                 }
 257 |             ],
 258 |             "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
 259 |             "homepage": "https://www.doctrine-project.org/projects/instantiator.html",
 260 |             "keywords": [
 261 |                 "constructor",
 262 |                 "instantiate"
 263 |             ],
 264 |             "support": {
 265 |                 "issues": "https://github.com/doctrine/instantiator/issues",
 266 |                 "source": "https://github.com/doctrine/instantiator/tree/1.4.1"
 267 |             },
 268 |             "funding": [
 269 |                 {
 270 |                     "url": "https://www.doctrine-project.org/sponsorship.html",
 271 |                     "type": "custom"
 272 |                 },
 273 |                 {
 274 |                     "url": "https://www.patreon.com/phpdoctrine",
 275 |                     "type": "patreon"
 276 |                 },
 277 |                 {
 278 |                     "url": "https://tidelift.com/funding/github/packagist/doctrine%2Finstantiator",
 279 |                     "type": "tidelift"
 280 |                 }
 281 |             ],
 282 |             "time": "2022-03-03T08:28:38+00:00"
 283 |         },
 284 |         {
 285 |             "name": "myclabs/deep-copy",
 286 |             "version": "1.11.0",
 287 |             "source": {
 288 |                 "type": "git",
 289 |                 "url": "https://github.com/myclabs/DeepCopy.git",
 290 |                 "reference": "14daed4296fae74d9e3201d2c4925d1acb7aa614"
 291 |             },
 292 |             "dist": {
 293 |                 "type": "zip",
 294 |                 "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/14daed4296fae74d9e3201d2c4925d1acb7aa614",
 295 |                 "reference": "14daed4296fae74d9e3201d2c4925d1acb7aa614",
 296 |                 "shasum": ""
 297 |             },
 298 |             "require": {
 299 |                 "php": "^7.1 || ^8.0"
 300 |             },
 301 |             "conflict": {
 302 |                 "doctrine/collections": "<1.6.8",
 303 |                 "doctrine/common": "<2.13.3 || >=3,<3.2.2"
 304 |             },
 305 |             "require-dev": {
 306 |                 "doctrine/collections": "^1.6.8",
 307 |                 "doctrine/common": "^2.13.3 || ^3.2.2",
 308 |                 "phpunit/phpunit": "^7.5.20 || ^8.5.23 || ^9.5.13"
 309 |             },
 310 |             "type": "library",
 311 |             "autoload": {
 312 |                 "files": [
 313 |                     "src/DeepCopy/deep_copy.php"
 314 |                 ],
 315 |                 "psr-4": {
 316 |                     "DeepCopy\\": "src/DeepCopy/"
 317 |                 }
 318 |             },
 319 |             "notification-url": "https://packagist.org/downloads/",
 320 |             "license": [
 321 |                 "MIT"
 322 |             ],
 323 |             "description": "Create deep copies (clones) of your objects",
 324 |             "keywords": [
 325 |                 "clone",
 326 |                 "copy",
 327 |                 "duplicate",
 328 |                 "object",
 329 |                 "object graph"
 330 |             ],
 331 |             "support": {
 332 |                 "issues": "https://github.com/myclabs/DeepCopy/issues",
 333 |                 "source": "https://github.com/myclabs/DeepCopy/tree/1.11.0"
 334 |             },
 335 |             "funding": [
 336 |                 {
 337 |                     "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
 338 |                     "type": "tidelift"
 339 |                 }
 340 |             ],
 341 |             "time": "2022-03-03T13:19:32+00:00"
 342 |         },
 343 |         {
 344 |             "name": "nikic/php-parser",
 345 |             "version": "v4.15.1",
 346 |             "source": {
 347 |                 "type": "git",
 348 |                 "url": "https://github.com/nikic/PHP-Parser.git",
 349 |                 "reference": "0ef6c55a3f47f89d7a374e6f835197a0b5fcf900"
 350 |             },
 351 |             "dist": {
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 354 |                 "reference": "0ef6c55a3f47f89d7a374e6f835197a0b5fcf900",
 355 |                 "shasum": ""
 356 |             },
 357 |             "require": {
 358 |                 "ext-tokenizer": "*",
 359 |                 "php": ">=7.0"
 360 |             },
 361 |             "require-dev": {
 362 |                 "ircmaxell/php-yacc": "^0.0.7",
 363 |                 "phpunit/phpunit": "^6.5 || ^7.0 || ^8.0 || ^9.0"
 364 |             },
 365 |             "bin": [
 366 |                 "bin/php-parse"
 367 |             ],
 368 |             "type": "library",
 369 |             "extra": {
 370 |                 "branch-alias": {
 371 |                     "dev-master": "4.9-dev"
 372 |                 }
 373 |             },
 374 |             "autoload": {
 375 |                 "psr-4": {
 376 |                     "PhpParser\\": "lib/PhpParser"
 377 |                 }
 378 |             },
 379 |             "notification-url": "https://packagist.org/downloads/",
 380 |             "license": [
 381 |                 "BSD-3-Clause"
 382 |             ],
 383 |             "authors": [
 384 |                 {
 385 |                     "name": "Nikita Popov"
 386 |                 }
 387 |             ],
 388 |             "description": "A PHP parser written in PHP",
 389 |             "keywords": [
 390 |                 "parser",
 391 |                 "php"
 392 |             ],
 393 |             "support": {
 394 |                 "issues": "https://github.com/nikic/PHP-Parser/issues",
 395 |                 "source": "https://github.com/nikic/PHP-Parser/tree/v4.15.1"
 396 |             },
 397 |             "time": "2022-09-04T07:30:47+00:00"
 398 |         },
 399 |         {
 400 |             "name": "phar-io/manifest",
 401 |             "version": "2.0.3",
 402 |             "source": {
 403 |                 "type": "git",
 404 |                 "url": "https://github.com/phar-io/manifest.git",
 405 |                 "reference": "97803eca37d319dfa7826cc2437fc020857acb53"
 406 |             },
 407 |             "dist": {
 408 |                 "type": "zip",
 409 |                 "url": "https://api.github.com/repos/phar-io/manifest/zipball/97803eca37d319dfa7826cc2437fc020857acb53",
 410 |                 "reference": "97803eca37d319dfa7826cc2437fc020857acb53",
 411 |                 "shasum": ""
 412 |             },
 413 |             "require": {
 414 |                 "ext-dom": "*",
 415 |                 "ext-phar": "*",
 416 |                 "ext-xmlwriter": "*",
 417 |                 "phar-io/version": "^3.0.1",
 418 |                 "php": "^7.2 || ^8.0"
 419 |             },
 420 |             "type": "library",
 421 |             "extra": {
 422 |                 "branch-alias": {
 423 |                     "dev-master": "2.0.x-dev"
 424 |                 }
 425 |             },
 426 |             "autoload": {
 427 |                 "classmap": [
 428 |                     "src/"
 429 |                 ]
 430 |             },
 431 |             "notification-url": "https://packagist.org/downloads/",
 432 |             "license": [
 433 |                 "BSD-3-Clause"
 434 |             ],
 435 |             "authors": [
 436 |                 {
 437 |                     "name": "Arne Blankerts",
 438 |                     "email": "arne@blankerts.de",
 439 |                     "role": "Developer"
 440 |                 },
 441 |                 {
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