simplesamlphp /
simplesamlphp-module-metarefresh
| Total Complexity | 105 |
| Total Lines | 609 |
| Duplicated Lines | 0 % |
| Changes | 6 | ||
| 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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| 14 | class MetaLoader |
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| 15 | { |
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| 16 | /** @var int|null */ |
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| 17 | private $expire; |
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| 18 | |||
| 19 | /** @var array */ |
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| 20 | private $metadata = []; |
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| 21 | |||
| 22 | /** @var object|null */ |
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| 23 | private $oldMetadataSrc; |
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| 24 | |||
| 25 | /** @var string|null */ |
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| 26 | private $stateFile = null; |
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| 27 | |||
| 28 | /** @var bool*/ |
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| 29 | private $changed = false; |
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| 30 | |||
| 31 | /** @var array */ |
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| 32 | private $state = []; |
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| 33 | |||
| 34 | /** @var array */ |
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| 35 | private $types = [ |
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| 36 | 'saml20-idp-remote', |
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| 37 | 'saml20-sp-remote', |
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| 38 | 'attributeauthority-remote' |
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| 39 | ]; |
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| 40 | |||
| 41 | |||
| 42 | /** |
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| 43 | * Constructor |
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| 44 | * |
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| 45 | * @param int|null $expire |
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| 46 | * @param string|null $stateFile |
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| 47 | * @param object|null $oldMetadataSrc |
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| 48 | */ |
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| 49 | public function __construct(int $expire = null, string $stateFile = null, object $oldMetadataSrc = null) |
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| 50 | { |
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| 51 | $this->expire = $expire; |
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| 52 | $this->oldMetadataSrc = $oldMetadataSrc; |
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| 53 | $this->stateFile = $stateFile; |
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| 54 | |||
| 55 | // Read file containing $state from disk |
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| 56 | /** @psalm-var array|null */ |
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| 57 | $state = null; |
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| 58 | if (!is_null($stateFile) && is_readable($stateFile)) { |
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| 59 | include($stateFile); |
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| 60 | } |
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| 61 | |||
| 62 | if (!empty($state)) { |
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|
introduced
by
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| 63 | $this->state = $state; |
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| 64 | } |
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| 65 | } |
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| 66 | |||
| 67 | |||
| 68 | /** |
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| 69 | * Get the types of entities that will be loaded. |
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| 70 | * |
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| 71 | * @return array The entity types allowed. |
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| 72 | */ |
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| 73 | public function getTypes(): array |
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| 76 | } |
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| 77 | |||
| 78 | |||
| 79 | /** |
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| 80 | * Set the types of entities that will be loaded. |
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| 81 | * |
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| 82 | * @param string|array $types Either a string with the name of one single type allowed, or an array with a list of |
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| 83 | * types. Pass an empty array to reset to all types of entities. |
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| 84 | * @return void |
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| 85 | */ |
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| 86 | public function setTypes($types): void |
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| 92 | } |
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| 93 | |||
| 94 | |||
| 95 | /** |
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| 96 | * This function processes a SAML metadata file. |
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| 97 | * |
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| 98 | * @param $source array |
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| 99 | * @return void |
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| 100 | */ |
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| 101 | public function loadSource(array $source): void |
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| 102 | { |
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| 103 | if (preg_match('@^https?://@i', $source['src'])) { |
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| 104 | // Build new HTTP context |
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| 105 | $context = $this->createContext($source); |
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| 106 | |||
| 107 | // GET! |
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| 108 | try { |
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| 109 | list($data, $responseHeaders) = \SimpleSAML\Utils\HTTP::fetch($source['src'], $context, true); |
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| 110 | } catch (\Exception $e) { |
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| 111 | Logger::warning('metarefresh: ' . $e->getMessage()); |
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| 112 | } |
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| 113 | |||
| 114 | // We have response headers, so the request succeeded |
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| 115 | if (!isset($responseHeaders)) { |
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| 116 | // No response headers, this means the request failed in some way, so re-use old data |
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| 117 | Logger::debug('No response from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 118 | $this->addCachedMetadata($source); |
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| 119 | return; |
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| 120 | } elseif (preg_match('@^HTTP/1\.[01]\s304\s@', $responseHeaders[0])) { |
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| 121 | // 304 response |
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| 122 | Logger::debug('Received HTTP 304 (Not Modified) - attempting to re-use cached metadata'); |
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| 123 | $this->addCachedMetadata($source); |
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| 124 | return; |
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| 125 | } elseif (!preg_match('@^HTTP/1\.[01]\s200\s@', $responseHeaders[0])) { |
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| 126 | // Other error |
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| 127 | Logger::debug('Error from ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 128 | $this->addCachedMetadata($source); |
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| 129 | return; |
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| 130 | } |
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| 131 | } else { |
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| 132 | // Local file. |
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| 133 | $data = file_get_contents($source['src']); |
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| 134 | $responseHeaders = null; |
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| 135 | } |
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| 136 | |||
| 137 | // Everything OK. Proceed. |
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| 138 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 139 | // Stale or no metadata, so a fresh copy |
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| 140 | Logger::debug('Downloaded fresh copy'); |
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| 141 | } |
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| 142 | |||
| 143 | try { |
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| 144 | $entities = $this->loadXML($data, $source); |
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| 145 | } catch (\Exception $e) { |
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| 146 | Logger::debug('XML parser error when parsing ' . $source['src'] . ' - attempting to re-use cached metadata'); |
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| 147 | Logger::debug('XML parser returned: ' . $e->getMessage()); |
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| 148 | $this->addCachedMetadata($source); |
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| 149 | return; |
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| 150 | } |
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| 151 | |||
| 152 | foreach ($entities as $entity) { |
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| 153 | if (isset($source['blacklist'])) { |
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| 154 | if (!empty($source['blacklist']) && in_array($entity->getEntityId(), $source['blacklist'], true)) { |
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| 155 | Logger::info('Skipping "' . $entity->getEntityId() . '" - blacklisted.' . "\n"); |
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| 156 | continue; |
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| 157 | } |
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| 158 | } |
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| 159 | |||
| 160 | if (isset($source['whitelist'])) { |
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| 161 | if (!empty($source['whitelist']) && !in_array($entity->getEntityId(), $source['whitelist'], true)) { |
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| 162 | Logger::info('Skipping "' . $entity->getEntityId() . '" - not in the whitelist.' . "\n"); |
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| 163 | continue; |
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| 164 | } |
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| 165 | } |
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| 166 | |||
| 167 | /* Do we have an attribute whitelist? */ |
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| 168 | if (isset($source['attributewhitelist']) && !empty($source['attributewhitelist'])) { |
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| 169 | $idpMetadata = $entity->getMetadata20IdP(); |
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| 170 | if (!isset($idpMetadata)) { |
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| 171 | /* Skip non-IdPs */ |
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| 172 | continue; |
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| 173 | } |
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| 174 | |||
| 175 | /* Do a recursive comparison for each whitelist of the attributewhitelist with the idpMetadata for this |
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| 176 | * IdP. At least one of these whitelists should match */ |
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| 177 | $match = false; |
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| 178 | foreach ($source['attributewhitelist'] as $whitelist) { |
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| 179 | if ($this->containsArray($whitelist, $idpMetadata)) { |
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| 180 | $match = true; |
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| 181 | break; |
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| 182 | } |
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| 183 | } |
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| 184 | if (!$match) { |
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| 185 | /* No match found -> next IdP */ |
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| 186 | continue; |
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| 187 | } |
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| 188 | Logger::debug('Whitelisted entityID: '. $entity->getEntityID()); |
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| 189 | } |
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| 190 | |||
| 191 | if (array_key_exists('certificates', $source) && ($source['certificates'] !== null)) { |
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| 192 | if (!$entity->validateSignature($source['certificates'])) { |
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| 193 | Logger::info( |
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| 194 | 'Skipping "' . $entity->getEntityId() . '" - could not verify signature using certificate.' . "\n" |
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| 195 | ); |
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| 196 | continue; |
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| 197 | } |
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| 198 | } |
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| 199 | |||
| 200 | $template = null; |
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| 201 | if (array_key_exists('template', $source)) { |
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| 202 | $template = $source['template']; |
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| 203 | } |
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| 204 | |||
| 205 | if (in_array('saml20-sp-remote', $this->types, true)) { |
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| 206 | $this->addMetadata($source['src'], $entity->getMetadata20SP(), 'saml20-sp-remote', $template); |
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| 207 | } |
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| 208 | if (in_array('saml20-idp-remote', $this->types, true)) { |
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| 209 | $this->addMetadata($source['src'], $entity->getMetadata20IdP(), 'saml20-idp-remote', $template); |
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| 210 | } |
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| 211 | if (in_array('attributeauthority-remote', $this->types, true)) { |
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| 212 | $attributeAuthorities = $entity->getAttributeAuthorities(); |
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| 213 | if (!empty($attributeAuthorities)) { |
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| 214 | $this->addMetadata( |
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| 215 | $source['src'], |
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| 216 | $attributeAuthorities, |
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| 217 | 'attributeauthority-remote', |
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| 218 | $template |
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| 219 | ); |
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| 220 | } |
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| 221 | } |
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| 222 | } |
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| 223 | |||
| 224 | $this->saveState($source, $responseHeaders); |
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| 225 | } |
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| 226 | |||
| 227 | |||
| 228 | /* |
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| 229 | * Recursively checks whether array $dst contains array $src. If $src |
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| 230 | * is not an array, a literal comparison is being performed. |
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| 231 | */ |
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| 232 | private function containsArray($src, $dst): bool |
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| 233 | { |
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| 234 | if (is_array($src)) { |
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| 235 | if (!is_array($dst)) { |
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| 236 | return false; |
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| 237 | } |
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| 238 | $dstKeys = array_keys($dst); |
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| 239 | |||
| 240 | /* Loop over all src keys */ |
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| 241 | foreach ($src as $srcKey => $srcval) { |
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| 242 | if (is_int($srcKey)) { |
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| 243 | /* key is number, check that the key appears as one |
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| 244 | * of the destination keys: if not, then src has |
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| 245 | * more keys than dst */ |
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| 246 | if (!array_key_exists($srcKey, $dst)) { |
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| 247 | return false; |
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| 248 | } |
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| 249 | |||
| 250 | /* loop over dest keys, to find value: we don't know |
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| 251 | * whether they are in the same order */ |
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| 252 | $submatch = false; |
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| 253 | foreach ($dstKeys as $dstKey) { |
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| 254 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 255 | $submatch = true; |
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| 256 | break; |
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| 257 | } |
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| 258 | } |
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| 259 | if (!$submatch) { |
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| 260 | return false; |
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| 261 | } |
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| 262 | } else { |
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| 263 | /* key is regexp: find matching keys */ |
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| 264 | $matchingDstKeys = preg_grep($srcKey, $dstKeys); |
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| 265 | if (!is_array($matchingDstKeys)) { |
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| 266 | return false; |
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| 267 | } |
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| 268 | |||
| 269 | $match = false; |
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| 270 | foreach ($matchingDstKeys as $dstKey) { |
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| 271 | if ($this->containsArray($srcval, $dst[$dstKey])) { |
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| 272 | /* Found a match */ |
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| 273 | $match = true; |
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| 274 | break; |
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| 275 | } |
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| 276 | } |
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| 277 | if (!$match) { |
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| 278 | /* none of the keys has a matching value */ |
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| 279 | return false; |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | /* each src key/value matches */ |
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| 284 | return true; |
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| 285 | } else { |
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| 286 | /* src is not an array, do a regexp match against dst */ |
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| 287 | return (preg_match($src, $dst) === 1); |
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| 288 | } |
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| 289 | } |
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| 290 | |||
| 291 | /** |
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| 292 | * Create HTTP context, with any available caches taken into account |
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| 293 | * |
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| 294 | * @param array $source |
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| 295 | * @return array |
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| 296 | */ |
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| 297 | private function createContext(array $source): array |
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| 298 | { |
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| 299 | $config = Configuration::getInstance(); |
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| 300 | $name = $config->getString('technicalcontact_name', null); |
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| 301 | $mail = $config->getString('technicalcontact_email', null); |
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| 302 | |||
| 303 | $rawheader = "User-Agent: SimpleSAMLphp metarefresh, run by $name <$mail>\r\n"; |
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| 304 | |||
| 305 | if (isset($source['conditionalGET']) && $source['conditionalGET']) { |
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| 306 | if (array_key_exists($source['src'], $this->state)) { |
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| 307 | $sourceState = $this->state[$source['src']]; |
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| 308 | |||
| 309 | if (isset($sourceState['last-modified'])) { |
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| 310 | $rawheader .= 'If-Modified-Since: ' . $sourceState['last-modified'] . "\r\n"; |
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| 311 | } |
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| 312 | |||
| 313 | if (isset($sourceState['etag'])) { |
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| 314 | $rawheader .= 'If-None-Match: ' . $sourceState['etag'] . "\r\n"; |
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| 315 | } |
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| 316 | } |
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| 317 | } |
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| 318 | |||
| 319 | return ['http' => ['header' => $rawheader]]; |
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| 320 | } |
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| 321 | |||
| 322 | |||
| 323 | /** |
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| 324 | * @param array $source |
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| 325 | * @return void |
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| 326 | */ |
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| 327 | private function addCachedMetadata(array $source): void |
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| 328 | { |
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| 329 | if (isset($this->oldMetadataSrc)) { |
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| 330 | foreach ($this->types as $type) { |
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| 331 | foreach ($this->oldMetadataSrc->getMetadataSet($type) as $entity) { |
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| 332 | if (array_key_exists('metarefresh:src', $entity)) { |
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| 333 | if ($entity['metarefresh:src'] == $source['src']) { |
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| 334 | $this->addMetadata($source['src'], $entity, $type); |
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| 335 | } |
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| 336 | } |
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| 337 | } |
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| 338 | } |
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| 339 | } |
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| 340 | } |
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| 341 | |||
| 342 | |||
| 343 | /** |
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| 344 | * Store caching state data for a source |
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| 345 | * |
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| 346 | * @param array $source |
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| 347 | * @param array|null $responseHeaders |
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| 348 | * @return void |
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| 349 | */ |
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| 350 | private function saveState(array $source, ?array $responseHeaders): void |
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| 368 | } |
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| 369 | } |
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| 370 | } |
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| 371 | |||
| 372 | |||
| 373 | /** |
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| 374 | * Parse XML metadata and return entities |
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| 375 | * |
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| 376 | * @param string $data |
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| 377 | * @param array $source |
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| 378 | * @return \SimpleSAML\Metadata\SAMLParser[] |
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| 379 | * @throws \Exception |
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| 380 | */ |
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| 381 | private function loadXML(string $data, array $source): array |
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| 382 | { |
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| 383 | try { |
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| 384 | $doc = \SAML2\DOMDocumentFactory::fromString($data); |
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| 385 | } catch (\Exception $e) { |
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| 386 | throw new \Exception('Failed to read XML from ' . $source['src']); |
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| 387 | } |
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| 388 | return \SimpleSAML\Metadata\SAMLParser::parseDescriptorsElement($doc->documentElement); |
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| 389 | } |
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| 390 | |||
| 391 | |||
| 392 | /** |
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| 393 | * This function writes the state array back to disk |
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| 394 | * |
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| 395 | * @return void |
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| 396 | */ |
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| 397 | public function writeState(): void |
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| 398 | { |
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| 399 | if ($this->changed && !is_null($this->stateFile)) { |
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| 400 | Logger::debug('Writing: ' . $this->stateFile); |
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| 401 | \SimpleSAML\Utils\System::writeFile( |
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| 402 | $this->stateFile, |
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| 403 | "<?php\n/* This file was generated by the metarefresh module at " . $this->getTime() . ".\n" . |
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| 404 | " Do not update it manually as it will get overwritten. */\n" . |
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| 405 | '$state = ' . var_export($this->state, true) . ";\n?>\n", |
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| 406 | 0644 |
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| 407 | ); |
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| 408 | } |
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| 409 | } |
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| 410 | |||
| 411 | |||
| 412 | /** |
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| 413 | * This function writes the metadata to stdout. |
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| 414 | * |
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| 415 | * @return void |
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| 416 | */ |
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| 417 | public function dumpMetadataStdOut(): void |
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| 418 | { |
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| 419 | foreach ($this->metadata as $category => $elements) { |
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| 420 | echo '/* The following data should be added to metadata/' . $category . '.php. */' . "\n"; |
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| 421 | |||
| 422 | foreach ($elements as $m) { |
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| 423 | $filename = $m['filename']; |
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| 424 | $entityID = $m['metadata']['entityid']; |
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| 425 | |||
| 426 | echo "\n"; |
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| 427 | echo '/* The following metadata was generated from ' . $filename . ' on ' . $this->getTime() . '. */' . "\n"; |
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| 428 | echo '$metadata[\'' . addslashes($entityID) . '\'] = ' . var_export($m['metadata'], true) . ';' . "\n"; |
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| 429 | } |
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| 430 | |||
| 431 | echo "\n"; |
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| 432 | echo '/* End of data which should be added to metadata/' . $category . '.php. */' . "\n"; |
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| 433 | echo "\n"; |
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| 434 | } |
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| 435 | } |
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| 436 | |||
| 437 | |||
| 438 | /** |
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| 439 | * This function adds metadata from the specified file to the list of metadata. |
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| 440 | * This function will return without making any changes if $metadata is NULL. |
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| 441 | * |
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| 442 | * @param string $filename The filename the metadata comes from. |
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| 443 | * @param \SAML2\XML\md\AttributeAuthorityDescriptor[]|null $metadata The metadata. |
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| 444 | * @param string $type The metadata type. |
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| 445 | * @param array|null $template The template. |
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| 446 | * @return void |
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| 447 | */ |
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| 448 | private function addMetadata(string $filename, ?array $metadata, string $type, array $template = null): void |
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| 449 | { |
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| 450 | if ($metadata === null) { |
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| 451 | return; |
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| 452 | } |
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| 453 | |||
| 454 | if (isset($template)) { |
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| 455 | $metadata = array_merge($metadata, $template); |
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| 456 | } |
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| 457 | |||
| 458 | $metadata['metarefresh:src'] = $filename; |
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| 459 | if (!array_key_exists($type, $this->metadata)) { |
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| 460 | $this->metadata[$type] = []; |
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| 461 | } |
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| 462 | |||
| 463 | // If expire is defined in constructor... |
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| 464 | if (!empty($this->expire)) { |
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| 465 | // If expire is already in metadata |
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| 466 | if (array_key_exists('expire', $metadata)) { |
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| 467 | // Override metadata expire with more restrictive global config |
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| 468 | if ($this->expire < $metadata['expire']) { |
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| 469 | $metadata['expire'] = $this->expire; |
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| 470 | } |
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| 471 | |||
| 472 | // If expire is not already in metadata use global config |
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| 473 | } else { |
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| 474 | $metadata['expire'] = $this->expire; |
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| 475 | } |
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| 476 | } |
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| 477 | $this->metadata[$type][] = ['filename' => $filename, 'metadata' => $metadata]; |
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| 478 | } |
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| 479 | |||
| 480 | |||
| 481 | /** |
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| 482 | * This function writes the metadata to an ARP file |
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| 483 | * |
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| 484 | * @param \SimpleSAML\Configuration $config |
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| 485 | * @return void |
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| 486 | */ |
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| 487 | public function writeARPfile(Configuration $config): void |
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| 488 | { |
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| 489 | $arpfile = $config->getValue('arpfile'); |
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| 490 | $types = ['saml20-sp-remote']; |
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| 491 | |||
| 492 | $md = []; |
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| 493 | foreach ($this->metadata as $category => $elements) { |
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| 494 | if (!in_array($category, $types, true)) { |
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| 495 | continue; |
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| 496 | } |
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| 497 | $md = array_merge($md, $elements); |
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| 498 | } |
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| 499 | |||
| 500 | // $metadata, $attributemap, $prefix, $suffix |
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| 501 | $arp = new \SimpleSAML\Module\metarefresh\ARP( |
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| 502 | $md, |
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| 503 | $config->getValue('attributemap', ''), |
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| 504 | $config->getValue('prefix', ''), |
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| 505 | $config->getValue('suffix', '') |
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| 506 | ); |
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| 507 | |||
| 508 | |||
| 509 | $arpxml = $arp->getXML(); |
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| 510 | |||
| 511 | Logger::info('Writing ARP file: ' . $arpfile . "\n"); |
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| 512 | file_put_contents($arpfile, $arpxml); |
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| 513 | } |
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| 514 | |||
| 515 | |||
| 516 | /** |
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| 517 | * This function writes the metadata to to separate files in the output directory. |
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| 518 | * |
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| 519 | * @param string $outputDir |
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| 520 | * @return void |
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| 521 | */ |
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| 522 | public function writeMetadataFiles(string $outputDir): void |
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| 560 | } |
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| 561 | } |
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| 562 | } |
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| 563 | } |
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| 564 | |||
| 565 | |||
| 566 | /** |
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| 567 | * Save metadata for loading with the 'serialize' metadata loader. |
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| 568 | * |
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| 569 | * @param string $outputDir The directory we should save the metadata to. |
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| 570 | * @return void |
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| 571 | */ |
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| 572 | public function writeMetadataSerialize(string $outputDir): void |
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| 610 | } |
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| 611 | } |
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| 612 | } |
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| 613 | |||
| 614 | |||
| 615 | /** |
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| 616 | * @return string |
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| 617 | */ |
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| 618 | private function getTime(): string |
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| 625 |
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