simplesamlphp /
simplesamlphp-module-metarefresh
| Total Complexity | 118 |
| Total Lines | 667 |
| Duplicated Lines | 0 % |
| Changes | 3 | ||
| Bugs | 0 | Features | 0 |
Complex classes like MetaLoader often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use MetaLoader, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 17 | class MetaLoader |
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| 18 | { |
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| 19 | /** @var int|null */ |
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| 20 | private ?int $expire; |
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| 21 | |||
| 22 | /** @var array */ |
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| 23 | private array $metadata = []; |
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| 24 | |||
| 25 | /** @var object|null */ |
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| 26 | private ?object $oldMetadataSrc; |
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| 27 | |||
| 28 | /** @var string|null */ |
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| 29 | private ?string $stateFile = null; |
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| 30 | |||
| 31 | /** @var bool */ |
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| 32 | private bool $changed = false; |
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| 33 | |||
| 34 | /** @var array */ |
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| 35 | private array $state = []; |
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| 36 | |||
| 37 | /** @var array */ |
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| 38 | private array $types = [ |
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| 39 | 'saml20-idp-remote', |
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| 40 | 'saml20-sp-remote', |
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| 41 | 'attributeauthority-remote' |
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| 42 | ]; |
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| 43 | |||
| 44 | |||
| 45 | /** |
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| 46 | * Constructor |
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| 47 | * |
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| 48 | * @param int|null $expire |
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| 49 | * @param string|null $stateFile |
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| 50 | * @param object|null $oldMetadataSrc |
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| 51 | */ |
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| 52 | public function __construct(int $expire = null, string $stateFile = null, object $oldMetadataSrc = null) |
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| 53 | { |
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| 54 | $this->expire = $expire; |
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| 55 | $this->oldMetadataSrc = $oldMetadataSrc; |
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| 56 | $this->stateFile = $stateFile; |
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| 57 | |||
| 58 | // Read file containing $state from disk |
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| 59 | /** @psalm-var array|null */ |
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| 60 | $state = null; |
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| 61 | if (!is_null($stateFile) && is_readable($stateFile)) { |
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| 62 | include($stateFile); |
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| 63 | } |
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| 64 | |||
| 65 | if (!empty($state)) { |
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|
introduced
by
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| 66 | $this->state = $state; |
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| 67 | } |
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| 68 | } |
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| 69 | |||
| 70 | |||
| 71 | /** |
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| 72 | * Get the types of entities that will be loaded. |
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| 73 | * |
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| 74 | * @return array The entity types allowed. |
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| 75 | */ |
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| 76 | public function getTypes(): array |
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| 77 | { |
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| 78 | return $this->types; |
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| 79 | } |
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| 80 | |||
| 81 | |||
| 82 | /** |
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| 83 | * Set the types of entities that will be loaded. |
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| 84 | * |
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| 85 | * @param string|array $types Either a string with the name of one single type allowed, or an array with a list of |
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| 86 | * types. Pass an empty array to reset to all types of entities. |
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| 87 | */ |
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| 88 | public function setTypes($types): void |
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| 89 | { |
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| 90 | if (!is_array($types)) { |
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| 91 | $types = [$types]; |
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| 92 | } |
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| 93 | $this->types = $types; |
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| 94 | } |
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| 95 | |||
| 96 | |||
| 97 | /** |
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| 98 | * This function processes a SAML metadata file. |
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| 99 | * |
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| 100 | * @param array $source |
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| 101 | */ |
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| 102 | public function loadSource(array $source): void |
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| 103 | { |
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| 104 | if (preg_match('@^https?://@i', $source['src'])) { |
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| 105 | // Build new HTTP context |
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| 106 | $context = $this->createContext($source); |
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| 107 | |||
| 108 | $httpUtils = new Utils\HTTP(); |
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| 109 | // GET! |
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| 110 | try { |
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| 111 | /** @var array $response We know this because we set the third parameter to `true` */ |
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| 112 | $response = $httpUtils->fetch($source['src'], $context, true); |
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| 113 | list($data, $responseHeaders) = $response; |
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| 114 | } catch (Exception $e) { |
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| 115 | Logger::warning('metarefresh: ' . $e->getMessage()); |
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| 116 | } |
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| 117 | |||
| 118 | // We have response headers, so the request succeeded |
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| 119 | if (!isset($responseHeaders)) { |
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| 120 | // No response headers, this means the request failed in some way, so re-use old data |
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| 121 | Logger::info('No response from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 122 | $this->addCachedMetadata($source); |
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| 123 | return; |
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| 124 | } elseif (preg_match('@^HTTP/1\.[01]\s304\s@', $responseHeaders[0])) { |
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| 125 | // 304 response |
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| 126 | Logger::debug('Received HTTP 304 (Not Modified) - attempting to re-use cached metadata'); |
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| 127 | $this->addCachedMetadata($source); |
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| 128 | return; |
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| 129 | } elseif (!preg_match('@^HTTP/1\.[01]\s200\s@', $responseHeaders[0])) { |
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| 130 | // Other error |
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| 131 | Logger::info('Error from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 132 | $this->addCachedMetadata($source); |
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| 133 | return; |
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| 134 | } |
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| 135 | } else { |
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| 136 | // Local file. |
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| 137 | $data = file_get_contents($source['src']); |
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| 138 | $responseHeaders = null; |
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| 139 | } |
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| 140 | |||
| 141 | // Everything OK. Proceed. |
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| 142 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 143 | // Stale or no metadata, so a fresh copy |
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| 144 | Logger::debug('Downloaded fresh copy'); |
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| 145 | } |
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| 146 | |||
| 147 | try { |
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| 148 | $entities = $this->loadXML($data, $source); |
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| 149 | } catch (Exception $e) { |
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| 150 | Logger::notice( |
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| 151 | 'XML parser error when parsing ' . $source['src'] . ' - attempting to re-use cached metadata' |
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| 152 | ); |
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| 153 | Logger::debug('XML parser returned: ' . $e->getMessage()); |
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| 154 | $this->addCachedMetadata($source); |
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| 155 | return; |
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| 156 | } |
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| 157 | |||
| 158 | foreach ($entities as $entity) { |
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| 159 | if (!$this->processBlacklist($entity, $source)) { |
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| 160 | continue; |
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| 161 | } |
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| 162 | if (!$this->processWhitelist($entity, $source)) { |
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| 163 | continue; |
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| 164 | } |
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| 165 | if (!$this->processAttributeWhitelist($entity, $source)) { |
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| 166 | continue; |
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| 167 | } |
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| 168 | if (!$this->processCertificates($entity, $source)) { |
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| 169 | continue; |
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| 170 | } |
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| 171 | |||
| 172 | $template = null; |
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| 173 | if (array_key_exists('template', $source)) { |
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| 174 | $template = $source['template']; |
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| 175 | } |
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| 176 | |||
| 177 | if (array_key_exists('regex-template', $source)) { |
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| 178 | foreach ($source['regex-template'] as $e => $t) { |
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| 179 | if (preg_match($e, $entity->getEntityID())) { |
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| 180 | if (is_array($template)) { |
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| 181 | $template = array_merge($template, $t); |
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| 182 | } else { |
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| 183 | $template = $t; |
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| 184 | } |
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| 185 | } |
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| 186 | } |
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| 187 | } |
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| 188 | |||
| 189 | if (in_array('saml20-sp-remote', $this->types, true)) { |
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| 190 | $this->addMetadata($source['src'], $entity->getMetadata20SP(), 'saml20-sp-remote', $template); |
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| 191 | } |
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| 192 | if (in_array('saml20-idp-remote', $this->types, true)) { |
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| 193 | $this->addMetadata($source['src'], $entity->getMetadata20IdP(), 'saml20-idp-remote', $template); |
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| 194 | } |
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| 195 | if (in_array('attributeauthority-remote', $this->types, true)) { |
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| 196 | $attributeAuthorities = $entity->getAttributeAuthorities(); |
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| 197 | if (!empty($attributeAuthorities)) { |
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| 198 | $this->addMetadata( |
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| 199 | $source['src'], |
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| 200 | $attributeAuthorities, |
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| 201 | 'attributeauthority-remote', |
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| 202 | $template |
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| 203 | ); |
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| 204 | } |
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| 205 | } |
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| 206 | } |
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| 207 | |||
| 208 | Logger::debug(sprintf('Found %d entities', count($entities))); |
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| 209 | $this->saveState($source, $responseHeaders); |
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| 210 | } |
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| 211 | |||
| 212 | |||
| 213 | /** |
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| 214 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 215 | * @param array $source |
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| 216 | * @bool |
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| 217 | */ |
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| 218 | private function processCertificates(Metadata\SAMLParser $entity, array $source): bool |
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| 219 | { |
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| 220 | if (array_key_exists('certificates', $source) && ($source['certificates'] !== null)) { |
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| 221 | if (!$entity->validateSignature($source['certificates'])) { |
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| 222 | $entityId = $entity->getEntityId(); |
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| 223 | Logger::notice( |
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| 224 | 'Skipping "' . $entityId . '" - could not verify signature using certificate.' . "\n" |
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| 225 | ); |
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| 226 | return false; |
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| 227 | } |
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| 228 | } |
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| 229 | return true; |
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| 230 | } |
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| 231 | |||
| 232 | |||
| 233 | /** |
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| 234 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 235 | * @param array $source |
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| 236 | * @bool |
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| 237 | */ |
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| 238 | private function processBlacklist(Metadata\SAMLParser $entity, array $source): bool |
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| 239 | { |
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| 240 | if (isset($source['blacklist'])) { |
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| 241 | if (!empty($source['blacklist']) && in_array($entity->getEntityId(), $source['blacklist'], true)) { |
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| 242 | Logger::info('Skipping "' . $entity->getEntityId() . '" - blacklisted.' . "\n"); |
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| 243 | return false; |
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| 244 | } |
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| 245 | } |
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| 246 | return true; |
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| 247 | } |
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| 248 | |||
| 249 | |||
| 250 | /** |
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| 251 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 252 | * @param array $source |
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| 253 | * @bool |
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| 254 | */ |
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| 255 | private function processWhitelist(Metadata\SAMLParser $entity, array $source): bool |
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| 256 | { |
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| 257 | if (isset($source['whitelist'])) { |
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| 258 | if (!empty($source['whitelist']) && !in_array($entity->getEntityId(), $source['whitelist'], true)) { |
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| 259 | Logger::info('Skipping "' . $entity->getEntityId() . '" - not in the whitelist.' . "\n"); |
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| 260 | return false; |
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| 261 | } |
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| 262 | } |
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| 263 | return true; |
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| 264 | } |
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| 265 | |||
| 266 | |||
| 267 | /** |
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| 268 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 269 | * @param array $source |
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| 270 | * @bool |
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| 271 | */ |
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| 272 | private function processAttributeWhitelist(Metadata\SAMLParser $entity, array $source): bool |
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| 273 | { |
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| 274 | /* Do we have an attribute whitelist? */ |
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| 275 | if (isset($source['attributewhitelist']) && !empty($source['attributewhitelist'])) { |
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| 276 | $idpMetadata = $entity->getMetadata20IdP(); |
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| 277 | if (!isset($idpMetadata)) { |
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| 278 | /* Skip non-IdPs */ |
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| 279 | return false; |
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| 280 | } |
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| 281 | |||
| 282 | /** |
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| 283 | * Do a recursive comparison for each whitelist of the attributewhitelist with the idpMetadata for this |
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| 284 | * IdP. At least one of these whitelists should match |
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| 285 | */ |
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| 286 | $match = false; |
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| 287 | foreach ($source['attributewhitelist'] as $whitelist) { |
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| 288 | if ($this->containsArray($whitelist, $idpMetadata)) { |
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| 289 | $match = true; |
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| 290 | break; |
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| 291 | } |
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| 292 | } |
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| 293 | if (!$match) { |
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| 294 | /* No match found -> next IdP */ |
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| 295 | return false; |
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| 296 | } |
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| 297 | Logger::debug('Whitelisted entityID: ' . $entity->getEntityID()); |
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| 298 | } |
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| 299 | return true; |
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| 300 | } |
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| 301 | |||
| 302 | |||
| 303 | /** |
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| 304 | * @param array|string $src |
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| 305 | * @param array|string $dst |
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| 306 | * @return bool |
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| 307 | * |
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| 308 | * Recursively checks whether array $dst contains array $src. If $src |
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| 309 | * is not an array, a literal comparison is being performed. |
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| 310 | */ |
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| 311 | private function containsArray($src, $dst): bool |
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| 312 | { |
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| 313 | if (is_array($src)) { |
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| 314 | if (!is_array($dst)) { |
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| 315 | return false; |
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| 316 | } |
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| 317 | $dstKeys = array_keys($dst); |
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| 318 | |||
| 319 | /* Loop over all src keys */ |
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| 320 | foreach ($src as $srcKey => $srcval) { |
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| 321 | if (is_int($srcKey)) { |
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| 322 | /* key is number, check that the key appears as one |
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| 323 | * of the destination keys: if not, then src has |
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| 324 | * more keys than dst */ |
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| 325 | if (!array_key_exists($srcKey, $dst)) { |
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| 326 | return false; |
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| 327 | } |
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| 328 | |||
| 329 | /* loop over dest keys, to find value: we don't know |
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| 330 | * whether they are in the same order */ |
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| 331 | $submatch = false; |
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| 332 | foreach ($dstKeys as $dstKey) { |
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| 333 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 334 | $submatch = true; |
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| 335 | break; |
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| 336 | } |
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| 337 | } |
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| 338 | if (!$submatch) { |
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| 339 | return false; |
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| 340 | } |
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| 341 | } else { |
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| 342 | /* key is regexp: find matching keys */ |
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| 343 | /** @var array|false $matchingDstKeys */ |
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| 344 | $matchingDstKeys = preg_grep($srcKey, $dstKeys); |
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| 345 | if (!is_array($matchingDstKeys)) { |
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| 346 | return false; |
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| 347 | } |
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| 348 | |||
| 349 | $match = false; |
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| 350 | foreach ($matchingDstKeys as $dstKey) { |
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| 351 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 352 | /* Found a match */ |
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| 353 | $match = true; |
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| 354 | break; |
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| 355 | } |
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| 356 | } |
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| 357 | if (!$match) { |
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| 358 | /* none of the keys has a matching value */ |
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| 359 | return false; |
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| 360 | } |
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| 361 | } |
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| 362 | } |
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| 363 | /* each src key/value matches */ |
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| 364 | return true; |
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| 365 | } else { |
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| 366 | /* src is not an array, do a regexp match against dst */ |
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| 367 | return (preg_match($src, strval($dst)) === 1); |
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| 368 | } |
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| 369 | } |
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| 370 | |||
| 371 | /** |
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| 372 | * Create HTTP context, with any available caches taken into account |
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| 373 | * |
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| 374 | * @param array $source |
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| 375 | * @return array |
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| 376 | */ |
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| 377 | private function createContext(array $source): array |
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| 378 | { |
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| 379 | $config = Configuration::getInstance(); |
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| 380 | $name = $config->getOptionalString('technicalcontact_name', null); |
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| 381 | $mail = $config->getOptionalString('technicalcontact_email', null); |
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| 382 | |||
| 383 | $rawheader = "User-Agent: SimpleSAMLphp metarefresh, run by $name <$mail>\r\n"; |
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| 384 | |||
| 385 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 386 | if (array_key_exists($source['src'], $this->state)) { |
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| 387 | $sourceState = $this->state[$source['src']]; |
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| 388 | |||
| 389 | if (isset($sourceState['last-modified'])) { |
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| 390 | $rawheader .= 'If-Modified-Since: ' . $sourceState['last-modified'] . "\r\n"; |
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| 391 | } |
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| 392 | |||
| 393 | if (isset($sourceState['etag'])) { |
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| 394 | $rawheader .= 'If-None-Match: ' . $sourceState['etag'] . "\r\n"; |
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| 395 | } |
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| 396 | } |
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| 397 | } |
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| 398 | |||
| 399 | return ['http' => ['header' => $rawheader]]; |
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| 400 | } |
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| 401 | |||
| 402 | private function addCachedMetadata(array $source): void |
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| 403 | { |
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| 404 | if (!isset($this->oldMetadataSrc)) { |
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| 405 | Logger::info('No oldMetadataSrc, cannot re-use cached metadata'); |
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| 406 | return; |
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| 407 | } |
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| 408 | |||
| 409 | foreach ($this->types as $type) { |
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| 410 | foreach ($this->oldMetadataSrc->getMetadataSet($type) as $entity) { |
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| 411 | if (array_key_exists('metarefresh:src', $entity)) { |
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| 412 | if ($entity['metarefresh:src'] == $source['src']) { |
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| 413 | $this->addMetadata($source['src'], $entity, $type); |
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| 414 | } |
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| 415 | } |
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| 416 | } |
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| 417 | } |
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| 418 | } |
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| 419 | |||
| 420 | |||
| 421 | /** |
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| 422 | * Store caching state data for a source |
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| 423 | * |
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| 424 | * @param array $source |
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| 425 | * @param array|null $responseHeaders |
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| 426 | */ |
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| 427 | private function saveState(array $source, ?array $responseHeaders): void |
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| 445 | } |
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| 446 | } |
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| 447 | } |
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| 448 | |||
| 449 | |||
| 450 | /** |
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| 451 | * Parse XML metadata and return entities |
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| 452 | * |
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| 453 | * @param string $data |
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| 454 | * @param array $source |
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| 455 | * @return \SimpleSAML\Metadata\SAMLParser[] |
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| 456 | * @throws \Exception |
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| 457 | */ |
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| 458 | private function loadXML(string $data, array $source): array |
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| 459 | { |
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| 460 | try { |
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| 461 | $doc = DOMDocumentFactory::fromString($data); |
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| 462 | } catch (Exception $e) { |
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| 463 | throw new Exception('Failed to read XML from ' . $source['src']); |
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| 464 | } |
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| 465 | return Metadata\SAMLParser::parseDescriptorsElement($doc->documentElement); |
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| 466 | } |
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| 467 | |||
| 468 | |||
| 469 | /** |
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| 470 | * This function writes the state array back to disk |
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| 471 | * |
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| 472 | */ |
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| 473 | public function writeState(): void |
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| 474 | { |
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| 475 | if ($this->changed && !is_null($this->stateFile)) { |
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| 476 | Logger::debug('Writing: ' . $this->stateFile); |
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| 477 | $sysUtils = new Utils\System(); |
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| 478 | $sysUtils->writeFile( |
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| 479 | $this->stateFile, |
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| 480 | "<?php\n/* This file was generated by the metarefresh module at " . $this->getTime() . ".\n" . |
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| 481 | " Do not update it manually as it will get overwritten. */\n" . |
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| 482 | '$state = ' . var_export($this->state, true) . ";\n", |
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| 483 | 0644 |
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| 484 | ); |
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| 485 | } |
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| 486 | } |
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| 487 | |||
| 488 | |||
| 489 | /** |
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| 490 | * This function writes the metadata to stdout. |
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| 491 | * |
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| 492 | */ |
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| 493 | public function dumpMetadataStdOut(): void |
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| 510 | } |
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| 511 | } |
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| 512 | private function addMetaData($filename, $metadata, $type, array $template = null) |
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| 513 | { |
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| 514 | if ($metadata === null) { |
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| 515 | return; |
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| 516 | } |
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| 517 | |||
| 518 | if (isset($template)) { |
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| 519 | $metadata = array_merge($metadata, $template); |
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| 520 | } |
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| 521 | |||
| 522 | $metadata['metarefresh:src'] = $filename; |
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| 523 | $entityId = $metadata['entityid']; |
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| 524 | if (!array_key_exists($type, $this->metadata)) { |
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| 525 | $this->metadata[$type] = []; |
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| 526 | } |
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| 527 | |||
| 528 | // If metadata with the same entity ID already exists, merge the keys arrays |
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| 529 | $existingMetadataIndex = $this->findMetadataIndexByEntityId($entityId); |
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| 530 | if ($existingMetadataIndex !== false) { |
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| 531 | $existingMetadata = $this->metadata[$type][$existingMetadataIndex]['metadata']; |
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| 532 | $existingKeys = $existingMetadata['keys']; |
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| 533 | $newKeys = $metadata['keys']; |
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| 534 | $mergedKeys = array_merge($existingKeys, $newKeys); |
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| 535 | $metadata['keys'] = $mergedKeys; |
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| 536 | |||
| 537 | // Replace the existing metadata with the merged metadata |
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| 538 | $this->metadata[$type][$existingMetadataIndex] = ['filename' => $filename, 'metadata' => $metadata]; |
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| 539 | } else { |
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| 540 | // If expire is defined in constructor... |
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| 541 | if (!empty($this->expire)) { |
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| 542 | // If expire is already in metadata |
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| 543 | if (array_key_exists('expire', $metadata)) { |
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| 544 | // Override metadata expire with more restrictive global config |
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| 545 | if ($this->expire < $metadata['expire']) { |
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| 546 | $metadata['expire'] = $this->expire; |
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| 547 | } |
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| 548 | |||
| 549 | // If expire is not already in metadata use global config |
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| 550 | } else { |
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| 551 | $metadata['expire'] = $this->expire; |
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| 552 | } |
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| 553 | } |
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| 554 | $this->metadata[$type][] = ['filename' => $filename, 'metadata' => $metadata]; |
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| 555 | } |
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| 556 | } |
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| 557 | |||
| 558 | private function findMetadataIndexByEntityId($entityId) |
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| 559 | { |
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| 560 | foreach ($this->metadata as $type => $metadataList) { |
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| 561 | foreach ($metadataList as $index => $metadata) { |
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| 562 | if ($metadata['metadata']['entityid'] === $entityId) { |
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| 563 | return $index; |
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| 564 | } |
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| 565 | } |
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| 566 | } |
||
| 567 | return false; |
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| 568 | } |
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| 569 | |||
| 570 | |||
| 571 | /** |
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| 572 | * This function writes the metadata to an ARP file |
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| 573 | * |
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| 574 | * @param \SimpleSAML\Configuration $config |
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| 575 | */ |
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| 576 | public function writeARPfile(Configuration $config): void |
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| 577 | { |
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| 578 | $arpfile = $config->getString('arpfile'); |
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| 579 | $types = ['saml20-sp-remote']; |
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| 580 | |||
| 581 | $md = []; |
||
| 582 | foreach ($this->metadata as $category => $elements) { |
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| 583 | if (!in_array($category, $types, true)) { |
||
| 584 | continue; |
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| 585 | } |
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| 586 | $md = array_merge($md, $elements); |
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| 587 | } |
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| 588 | |||
| 589 | // $metadata, $attributemap, $prefix, $suffix |
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| 590 | $arp = new ARP( |
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| 591 | $md, |
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| 592 | $config->getOptionalString('attributemap', ''), |
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| 593 | $config->getOptionalString('prefix', ''), |
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| 594 | $config->getOptionalString('suffix', '') |
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| 595 | ); |
||
| 596 | |||
| 597 | |||
| 598 | $arpxml = $arp->getXML(); |
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| 599 | |||
| 600 | Logger::info('Writing ARP file: ' . $arpfile . "\n"); |
||
| 601 | file_put_contents($arpfile, $arpxml); |
||
| 602 | } |
||
| 603 | |||
| 604 | |||
| 605 | /** |
||
| 606 | * This function writes the metadata to to separate files in the output directory. |
||
| 607 | * |
||
| 608 | * @param string $outputDir |
||
| 609 | */ |
||
| 610 | public function writeMetadataFiles(string $outputDir): void |
||
| 647 | } |
||
| 648 | } |
||
| 649 | } |
||
| 650 | } |
||
| 651 | |||
| 652 | |||
| 653 | /** |
||
| 654 | * Save metadata for loading with the 'serialize' metadata loader. |
||
| 655 | * |
||
| 656 | * @param string $outputDir The directory we should save the metadata to. |
||
| 657 | */ |
||
| 658 | public function writeMetadataSerialize(string $outputDir): void |
||
| 672 | } |
||
| 673 | } |
||
| 674 | } |
||
| 675 | |||
| 676 | |||
| 677 | /** |
||
| 678 | * @return string |
||
| 679 | */ |
||
| 680 | private function getTime(): string |
||
| 686 |
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