simplesamlphp /
simplesamlphp-module-metarefresh
| Total Complexity | 116 |
| Total Lines | 676 |
| Duplicated Lines | 0 % |
| Changes | 14 | ||
| 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 $expire; |
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| 21 | |||
| 22 | /** @var array */ |
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| 23 | private $metadata = []; |
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| 24 | |||
| 25 | /** @var object|null */ |
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| 26 | private $oldMetadataSrc; |
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| 27 | |||
| 28 | /** @var string|null */ |
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| 29 | private $stateFile = null; |
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| 30 | |||
| 31 | /** @var bool*/ |
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| 32 | private $changed = false; |
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| 33 | |||
| 34 | /** @var array */ |
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| 35 | private $state = []; |
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| 36 | |||
| 37 | /** @var array */ |
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| 38 | private $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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| 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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| 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 | // GET! |
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| 109 | try { |
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| 110 | /** @var array $response We know this because we set the third parameter to `true` */ |
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| 111 | $response = Utils\HTTP::fetch($source['src'], $context, true); |
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| 112 | list($data, $responseHeaders) = $response; |
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| 113 | } catch (Exception $e) { |
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| 114 | Logger::warning('metarefresh: ' . $e->getMessage()); |
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| 115 | } |
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| 116 | |||
| 117 | // We have response headers, so the request succeeded |
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| 118 | if (!isset($responseHeaders)) { |
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| 119 | // No response headers, this means the request failed in some way, so re-use old data |
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| 120 | Logger::debug('No response from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 121 | $this->addCachedMetadata($source); |
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| 122 | return; |
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| 123 | } elseif (preg_match('@^HTTP/1\.[01]\s304\s@', $responseHeaders[0])) { |
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| 124 | // 304 response |
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| 125 | Logger::debug('Received HTTP 304 (Not Modified) - attempting to re-use cached metadata'); |
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| 126 | $this->addCachedMetadata($source); |
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| 127 | return; |
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| 128 | } elseif (!preg_match('@^HTTP/1\.[01]\s200\s@', $responseHeaders[0])) { |
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| 129 | // Other error |
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| 130 | Logger::debug('Error from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 131 | $this->addCachedMetadata($source); |
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| 132 | return; |
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| 133 | } |
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| 134 | } else { |
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| 135 | // Local file. |
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| 136 | $data = file_get_contents($source['src']); |
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| 137 | $responseHeaders = null; |
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| 138 | } |
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| 139 | |||
| 140 | // Everything OK. Proceed. |
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| 141 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 142 | // Stale or no metadata, so a fresh copy |
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| 143 | Logger::debug('Downloaded fresh copy'); |
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| 144 | } |
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| 145 | |||
| 146 | try { |
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| 147 | $entities = $this->loadXML($data, $source); |
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| 148 | } catch (Exception $e) { |
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| 149 | Logger::debug( |
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| 150 | 'XML parser error when parsing ' . $source['src'] . ' - attempting to re-use cached metadata' |
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| 151 | ); |
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| 152 | Logger::debug('XML parser returned: ' . $e->getMessage()); |
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| 153 | $this->addCachedMetadata($source); |
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| 154 | return; |
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| 155 | } |
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| 156 | |||
| 157 | foreach ($entities as $entity) { |
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| 158 | if (!$this->processBlacklist($entity, $source)) { |
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| 159 | continue; |
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| 160 | } |
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| 161 | if (!$this->processWhitelist($entity, $source)) { |
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| 162 | continue; |
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| 163 | } |
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| 164 | if (!$this->processAttributeWhitelist($entity, $source)) { |
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| 165 | continue; |
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| 166 | } |
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| 167 | |||
| 168 | if (array_key_exists('certificates', $source) && ($source['certificates'] !== null)) { |
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| 169 | if (!$entity->validateSignature($source['certificates'])) { |
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| 170 | $entityId = $entity->getEntityId(); |
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| 171 | Logger::info( |
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| 172 | 'Skipping "' . $entityId . '" - could not verify signature using certificate.' . "\n" |
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| 173 | ); |
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| 174 | continue; |
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| 175 | } |
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| 176 | } |
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| 177 | |||
| 178 | $template = null; |
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| 179 | if (array_key_exists('template', $source)) { |
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| 180 | $template = $source['template']; |
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| 181 | } |
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| 182 | |||
| 183 | if (in_array('saml20-sp-remote', $this->types, true)) { |
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| 184 | $this->addMetadata($source['src'], $entity->getMetadata20SP(), 'saml20-sp-remote', $template); |
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| 185 | } |
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| 186 | if (in_array('saml20-idp-remote', $this->types, true)) { |
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| 187 | $this->addMetadata($source['src'], $entity->getMetadata20IdP(), 'saml20-idp-remote', $template); |
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| 188 | } |
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| 189 | if (in_array('attributeauthority-remote', $this->types, true)) { |
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| 190 | $attributeAuthorities = $entity->getAttributeAuthorities(); |
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| 191 | if (!empty($attributeAuthorities)) { |
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| 192 | $this->addMetadata( |
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| 193 | $source['src'], |
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| 194 | $attributeAuthorities, |
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| 195 | 'attributeauthority-remote', |
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| 196 | $template |
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| 197 | ); |
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| 198 | } |
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| 199 | } |
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| 200 | } |
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| 201 | |||
| 202 | $this->saveState($source, $responseHeaders); |
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| 203 | } |
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| 204 | |||
| 205 | |||
| 206 | /** |
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| 207 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 208 | * @param array $source |
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| 209 | * @bool |
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| 210 | */ |
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| 211 | private function processCertificates(Metadata\SAMLParser $entity, array $source): bool |
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| 212 | { |
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| 213 | if (array_key_exists('certificates', $source) && ($source['certificates'] !== null)) { |
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| 214 | if (!$entity->validateSignature($source['certificates'])) { |
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| 215 | $entityId = $entity->getEntityId(); |
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| 216 | Logger::info( |
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| 217 | 'Skipping "' . $entityId . '" - could not verify signature using certificate.' . "\n" |
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| 218 | ); |
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| 219 | return false; |
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| 220 | } |
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| 221 | } |
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| 222 | return true; |
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| 223 | } |
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| 224 | |||
| 225 | |||
| 226 | /** |
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| 227 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 228 | * @param array $source |
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| 229 | * @bool |
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| 230 | */ |
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| 231 | private function processBlacklist(Metadata\SAMLParser $entity, array $source): bool |
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| 232 | { |
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| 233 | if (isset($source['blacklist'])) { |
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| 234 | if (!empty($source['blacklist']) && in_array($entity->getEntityId(), $source['blacklist'], true)) { |
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| 235 | Logger::info('Skipping "' . $entity->getEntityId() . '" - blacklisted.' . "\n"); |
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| 236 | return false; |
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| 237 | } |
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| 238 | } |
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| 239 | return true; |
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| 240 | } |
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| 241 | |||
| 242 | |||
| 243 | /** |
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| 244 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 245 | * @param array $source |
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| 246 | * @bool |
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| 247 | */ |
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| 248 | private function processWhitelist(Metadata\SAMLParser $entity, array $source): bool |
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| 249 | { |
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| 250 | if (isset($source['whitelist'])) { |
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| 251 | if (!empty($source['whitelist']) && !in_array($entity->getEntityId(), $source['whitelist'], true)) { |
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| 252 | Logger::info('Skipping "' . $entity->getEntityId() . '" - not in the whitelist.' . "\n"); |
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| 253 | return false; |
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| 254 | } |
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| 255 | } |
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| 256 | return true; |
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| 257 | } |
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| 258 | |||
| 259 | |||
| 260 | /** |
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| 261 | * @param \SimpleSAML\Metadata\SAMLParser $entity |
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| 262 | * @param array $source |
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| 263 | * @bool |
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| 264 | */ |
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| 265 | private function processAttributeWhitelist(Metadata\SAMLParser $entity, array $source): bool |
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| 293 | } |
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| 294 | |||
| 295 | |||
| 296 | /** |
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| 297 | * @param array|string $src |
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| 298 | * @param array|string $dst |
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| 299 | * @return bool |
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| 300 | * |
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| 301 | * Recursively checks whether array $dst contains array $src. If $src |
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| 302 | * is not an array, a literal comparison is being performed. |
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| 303 | */ |
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| 304 | private function containsArray($src, $dst): bool |
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| 305 | { |
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| 306 | if (is_array($src)) { |
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| 307 | if (!is_array($dst)) { |
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| 308 | return false; |
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| 309 | } |
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| 310 | $dstKeys = array_keys($dst); |
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| 311 | |||
| 312 | /* Loop over all src keys */ |
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| 313 | foreach ($src as $srcKey => $srcval) { |
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| 314 | if (is_int($srcKey)) { |
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| 315 | /* key is number, check that the key appears as one |
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| 316 | * of the destination keys: if not, then src has |
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| 317 | * more keys than dst */ |
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| 318 | if (!array_key_exists($srcKey, $dst)) { |
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| 319 | return false; |
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| 320 | } |
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| 321 | |||
| 322 | /* loop over dest keys, to find value: we don't know |
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| 323 | * whether they are in the same order */ |
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| 324 | $submatch = false; |
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| 325 | foreach ($dstKeys as $dstKey) { |
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| 326 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 327 | $submatch = true; |
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| 328 | break; |
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| 329 | } |
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| 330 | } |
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| 331 | if (!$submatch) { |
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| 332 | return false; |
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| 333 | } |
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| 334 | } else { |
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| 335 | /* key is regexp: find matching keys */ |
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| 336 | /** @var array|false $matchingDstKeys */ |
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| 337 | $matchingDstKeys = preg_grep($srcKey, $dstKeys); |
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| 338 | if (!is_array($matchingDstKeys)) { |
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| 339 | return false; |
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| 340 | } |
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| 341 | |||
| 342 | $match = false; |
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| 343 | foreach ($matchingDstKeys as $dstKey) { |
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| 344 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 345 | /* Found a match */ |
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| 346 | $match = true; |
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| 347 | break; |
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| 348 | } |
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| 349 | } |
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| 350 | if (!$match) { |
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| 351 | /* none of the keys has a matching value */ |
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| 352 | return false; |
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| 353 | } |
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| 354 | } |
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| 355 | } |
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| 356 | /* each src key/value matches */ |
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| 357 | return true; |
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| 358 | } else { |
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| 359 | /* src is not an array, do a regexp match against dst */ |
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| 360 | return (preg_match($src, strval($dst)) === 1); |
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| 361 | } |
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| 362 | } |
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| 363 | |||
| 364 | /** |
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| 365 | * Create HTTP context, with any available caches taken into account |
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| 366 | * |
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| 367 | * @param array $source |
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| 368 | * @return array |
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| 369 | */ |
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| 370 | private function createContext(array $source): array |
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| 371 | { |
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| 372 | $config = Configuration::getInstance(); |
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| 373 | $name = $config->getString('technicalcontact_name', null); |
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| 374 | $mail = $config->getString('technicalcontact_email', null); |
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| 375 | |||
| 376 | $rawheader = "User-Agent: SimpleSAMLphp metarefresh, run by $name <$mail>\r\n"; |
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| 377 | |||
| 378 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 379 | if (array_key_exists($source['src'], $this->state)) { |
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| 380 | $sourceState = $this->state[$source['src']]; |
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| 381 | |||
| 382 | if (isset($sourceState['last-modified'])) { |
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| 383 | $rawheader .= 'If-Modified-Since: ' . $sourceState['last-modified'] . "\r\n"; |
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| 384 | } |
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| 385 | |||
| 386 | if (isset($sourceState['etag'])) { |
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| 387 | $rawheader .= 'If-None-Match: ' . $sourceState['etag'] . "\r\n"; |
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| 388 | } |
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| 389 | } |
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| 390 | } |
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| 391 | |||
| 392 | return ['http' => ['header' => $rawheader]]; |
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| 393 | } |
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| 394 | |||
| 395 | |||
| 396 | /** |
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| 397 | * @param array $source |
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| 398 | */ |
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| 399 | private function addCachedMetadata(array $source): void |
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| 400 | { |
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| 401 | if (isset($this->oldMetadataSrc)) { |
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| 402 | foreach ($this->types as $type) { |
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| 403 | foreach ($this->oldMetadataSrc->getMetadataSet($type) as $entity) { |
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| 404 | if (array_key_exists('metarefresh:src', $entity)) { |
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| 405 | if ($entity['metarefresh:src'] == $source['src']) { |
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| 406 | $this->addMetadata($source['src'], $entity, $type); |
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| 407 | } |
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| 408 | } |
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| 409 | } |
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| 410 | } |
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| 411 | } |
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| 412 | } |
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| 413 | |||
| 414 | |||
| 415 | /** |
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| 416 | * Store caching state data for a source |
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| 417 | * |
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| 418 | * @param array $source |
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| 419 | * @param array|null $responseHeaders |
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| 420 | */ |
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| 421 | private function saveState(array $source, ?array $responseHeaders): void |
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| 439 | } |
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| 440 | } |
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| 441 | } |
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| 442 | |||
| 443 | |||
| 444 | /** |
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| 445 | * Parse XML metadata and return entities |
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| 446 | * |
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| 447 | * @param string $data |
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| 448 | * @param array $source |
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| 449 | * @return \SimpleSAML\Metadata\SAMLParser[] |
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| 450 | * @throws \Exception |
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| 451 | */ |
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| 452 | private function loadXML(string $data, array $source): array |
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| 453 | { |
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| 454 | try { |
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| 455 | $doc = DOMDocumentFactory::fromString($data); |
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| 456 | } catch (Exception $e) { |
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| 457 | throw new Exception('Failed to read XML from ' . $source['src']); |
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| 458 | } |
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| 459 | return Metadata\SAMLParser::parseDescriptorsElement($doc->documentElement); |
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| 460 | } |
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| 461 | |||
| 462 | |||
| 463 | /** |
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| 464 | * This function writes the state array back to disk |
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| 465 | * |
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| 466 | */ |
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| 467 | public function writeState(): void |
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| 468 | { |
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| 469 | if ($this->changed && !is_null($this->stateFile)) { |
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| 470 | Logger::debug('Writing: ' . $this->stateFile); |
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| 471 | Utils\System::writeFile( |
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| 472 | $this->stateFile, |
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| 473 | "<?php\n/* This file was generated by the metarefresh module at " . $this->getTime() . ".\n" . |
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| 474 | " Do not update it manually as it will get overwritten. */\n" . |
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| 475 | '$state = ' . var_export($this->state, true) . ";\n?>\n", |
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| 476 | 0644 |
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| 477 | ); |
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| 478 | } |
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| 479 | } |
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| 480 | |||
| 481 | |||
| 482 | /** |
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| 483 | * This function writes the metadata to stdout. |
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| 484 | * |
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| 485 | */ |
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| 486 | public function dumpMetadataStdOut(): void |
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| 487 | { |
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| 488 | foreach ($this->metadata as $category => $elements) { |
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| 489 | echo '/* The following data should be added to metadata/' . $category . '.php. */' . "\n"; |
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| 490 | |||
| 491 | foreach ($elements as $m) { |
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| 492 | $filename = $m['filename']; |
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| 493 | $entityID = $m['metadata']['entityid']; |
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| 494 | $time = $this->getTime(); |
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| 495 | echo "\n"; |
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| 496 | echo '/* The following metadata was generated from ' . $filename . ' on ' . $time . '. */' . "\n"; |
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| 497 | echo '$metadata[\'' . addslashes($entityID) . '\'] = ' . var_export($m['metadata'], true) . ';' . "\n"; |
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| 498 | } |
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| 499 | |||
| 500 | echo "\n"; |
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| 501 | echo '/* End of data which should be added to metadata/' . $category . '.php. */' . "\n"; |
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| 502 | echo "\n"; |
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| 503 | } |
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| 504 | } |
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| 505 | |||
| 506 | |||
| 507 | /** |
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| 508 | * This function adds metadata from the specified file to the list of metadata. |
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| 509 | * This function will return without making any changes if $metadata is NULL. |
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| 510 | * |
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| 511 | * @param string $filename The filename the metadata comes from. |
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| 512 | * @param \SAML2\XML\md\AttributeAuthorityDescriptor[]|null $metadata The metadata. |
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| 513 | * @param string $type The metadata type. |
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| 514 | * @param array|null $template The template. |
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| 515 | */ |
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| 516 | private function addMetadata(string $filename, ?array $metadata, string $type, array $template = null): void |
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| 517 | { |
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| 518 | if ($metadata === null) { |
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| 519 | return; |
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| 520 | } |
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| 521 | |||
| 522 | if (isset($template)) { |
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| 523 | $metadata = array_merge($metadata, $template); |
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| 524 | } |
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| 525 | |||
| 526 | $metadata['metarefresh:src'] = $filename; |
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| 527 | if (!array_key_exists($type, $this->metadata)) { |
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| 528 | $this->metadata[$type] = []; |
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| 529 | } |
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| 530 | |||
| 531 | // If expire is defined in constructor... |
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| 532 | if (!empty($this->expire)) { |
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| 533 | // If expire is already in metadata |
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| 534 | if (array_key_exists('expire', $metadata)) { |
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| 535 | // Override metadata expire with more restrictive global config |
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| 536 | if ($this->expire < $metadata['expire']) { |
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| 537 | $metadata['expire'] = $this->expire; |
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| 538 | } |
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| 539 | |||
| 540 | // If expire is not already in metadata use global config |
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| 541 | } else { |
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| 542 | $metadata['expire'] = $this->expire; |
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| 543 | } |
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| 544 | } |
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| 545 | $this->metadata[$type][] = ['filename' => $filename, 'metadata' => $metadata]; |
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| 546 | } |
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| 547 | |||
| 548 | |||
| 549 | /** |
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| 550 | * This function writes the metadata to an ARP file |
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| 551 | * |
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| 552 | * @param \SimpleSAML\Configuration $config |
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| 553 | */ |
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| 554 | public function writeARPfile(Configuration $config): void |
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| 555 | { |
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| 556 | $arpfile = $config->getValue('arpfile'); |
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| 557 | $types = ['saml20-sp-remote']; |
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| 558 | |||
| 559 | $md = []; |
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| 560 | foreach ($this->metadata as $category => $elements) { |
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| 561 | if (!in_array($category, $types, true)) { |
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| 562 | continue; |
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| 563 | } |
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| 564 | $md = array_merge($md, $elements); |
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| 565 | } |
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| 566 | |||
| 567 | // $metadata, $attributemap, $prefix, $suffix |
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| 568 | $arp = new ARP( |
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| 569 | $md, |
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| 570 | $config->getValue('attributemap', ''), |
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| 571 | $config->getValue('prefix', ''), |
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| 572 | $config->getValue('suffix', '') |
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| 573 | ); |
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| 574 | |||
| 575 | |||
| 576 | $arpxml = $arp->getXML(); |
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| 577 | |||
| 578 | Logger::info('Writing ARP file: ' . $arpfile . "\n"); |
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| 579 | file_put_contents($arpfile, $arpxml); |
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| 580 | } |
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| 581 | |||
| 582 | |||
| 583 | /** |
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| 584 | * This function writes the metadata to to separate files in the output directory. |
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| 585 | * |
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| 586 | * @param string $outputDir |
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| 587 | */ |
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| 588 | public function writeMetadataFiles(string $outputDir): void |
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| 626 | } |
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| 627 | } |
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| 628 | } |
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| 629 | } |
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| 630 | |||
| 631 | |||
| 632 | /** |
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| 633 | * Save metadata for loading with the 'serialize' metadata loader. |
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| 634 | * |
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| 635 | * @param string $outputDir The directory we should save the metadata to. |
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| 636 | */ |
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| 637 | public function writeMetadataSerialize(string $outputDir): void |
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| 680 | } |
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| 681 | } |
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| 682 | } |
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| 683 | |||
| 684 | |||
| 685 | /** |
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| 686 | * @return string |
||
| 687 | */ |
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| 688 | private function getTime(): string |
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| 689 | { |
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| 690 | // The current date, as a string |
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| 695 |
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