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<?php |
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/****************************************************************************** |
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* Wikipedia Account Creation Assistance tool * |
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* ACC Development Team. Please see team.json for a list of contributors. * |
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* * |
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* This is free and unencumbered software released into the public domain. * |
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* Please see LICENSE.md for the full licencing statement. * |
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******************************************************************************/ |
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namespace Waca\Security\CredentialProviders; |
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use ParagonIE\ConstantTime\Base32; |
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use Waca\DataObjects\User; |
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use Waca\Exceptions\ApplicationLogicException; |
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use Waca\Exceptions\OptimisticLockFailedException; |
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use Waca\PdoDatabase; |
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use Waca\Security\EncryptionHelper; |
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use Waca\SessionAlert; |
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use Waca\SiteConfiguration; |
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use Waca\WebRequest; |
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class ScratchTokenCredentialProvider extends CredentialProviderBase |
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{ |
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/** @var EncryptionHelper */ |
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private $encryptionHelper; |
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/** @var array the tokens generated in the last generation round. */ |
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private $generatedTokens; |
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/** |
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* ScratchTokenCredentialProvider constructor. |
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* |
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* @param PdoDatabase $database |
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* @param SiteConfiguration $configuration |
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*/ |
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public function __construct(PdoDatabase $database, SiteConfiguration $configuration) |
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{ |
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parent::__construct($database, $configuration, 'scratch'); |
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$this->encryptionHelper = new EncryptionHelper($configuration); |
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} |
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/** |
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* Validates a user-provided credential |
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* |
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* @param User $user The user to test the authentication against |
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* @param string $data The raw credential data to be validated |
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* |
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* @return bool |
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* @throws ApplicationLogicException|OptimisticLockFailedException |
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*/ |
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public function authenticate(User $user, $data) |
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{ |
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if (is_array($data)) { |
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return false; |
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} |
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$storedData = $this->getCredentialData($user->getId()); |
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if ($storedData === null) { |
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throw new ApplicationLogicException('Credential data not found'); |
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} |
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$scratchTokens = unserialize($this->encryptionHelper->decryptData($storedData->getData())); |
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$usedToken = null; |
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foreach ($scratchTokens as $scratchToken) { |
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if (password_verify($data, $scratchToken)) { |
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$usedToken = $scratchToken; |
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SessionAlert::quick("Hey, it looks like you used a scratch token to log in. Would you like to change your multi-factor authentication configuration?", 'alert-warning'); |
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WebRequest::setPostLoginRedirect($this->getConfiguration()->getBaseUrl() . "/internal.php/multiFactor"); |
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break; |
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} |
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} |
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if ($usedToken === null) { |
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return false; |
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} |
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$scratchTokens = array_diff($scratchTokens, [$usedToken]); |
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$storedData->setData($this->encryptionHelper->encryptData(serialize($scratchTokens))); |
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$storedData->save(); |
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return true; |
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} |
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/** |
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* @param User $user The user the credential belongs to |
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* @param int $factor The factor this credential provides |
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* @param string $data Unused. |
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* |
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* @throws OptimisticLockFailedException |
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*/ |
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public function setCredential(User $user, $factor, $data) |
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{ |
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$plaintextScratch = array(); |
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$storedScratch = array(); |
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for ($i = 0; $i < 5; $i++) { |
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$token = Base32::encodeUpper(openssl_random_pseudo_bytes(10)); |
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$plaintextScratch[] = $token; |
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$storedScratch[] = password_hash( |
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$token, |
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PasswordCredentialProvider::PASSWORD_ALGO, |
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array('cost' => PasswordCredentialProvider::PASSWORD_COST) |
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); |
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} |
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$storedData = $this->getCredentialData($user->getId(), null); |
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if ($storedData !== null) { |
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$storedData->delete(); |
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} |
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$storedData = $this->createNewCredential($user); |
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$storedData->setData($this->encryptionHelper->encryptData(serialize($storedScratch))); |
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$storedData->setFactor($factor); |
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$storedData->setVersion(1); |
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$storedData->setPriority(9); |
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$storedData->save(); |
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$this->generatedTokens = $plaintextScratch; |
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} |
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/** |
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* Gets the count of remaining valid tokens |
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* |
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* @param int $userId |
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* |
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* @return int |
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*/ |
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public function getRemaining($userId) |
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{ |
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$storedData = $this->getCredentialData($userId); |
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if ($storedData === null) { |
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return 0; |
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} |
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$scratchTokens = unserialize($this->encryptionHelper->decryptData($storedData->getData())); |
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return count($scratchTokens); |
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} |
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/** |
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* @return array |
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*/ |
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public function getTokens() |
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{ |
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if ($this->generatedTokens != null) { |
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return $this->generatedTokens; |
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} |
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return array(); |
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} |
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} |
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enwikipedia-acc /
waca
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