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<?php |
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/****************************************************************************** |
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* Wikipedia Account Creation Assistance tool * |
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* * |
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* All code in this file is released into the public domain by the ACC * |
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* Development Team. Please see team.json for a list of contributors. * |
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******************************************************************************/ |
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namespace Waca\Helpers; |
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use PDO; |
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use Waca\DataObjects\Ban; |
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use Waca\DataObjects\Request; |
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use Waca\DataObjects\User; |
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use Waca\Helpers\Interfaces\IBanHelper; |
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use Waca\PdoDatabase; |
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use Waca\Providers\Interfaces\IXffTrustProvider; |
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use Waca\Security\SecurityManager; |
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class BanHelper implements IBanHelper |
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{ |
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/** @var PdoDatabase */ |
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private $database; |
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/** @var IXffTrustProvider */ |
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private $xffTrustProvider; |
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/** @var Ban[][] */ |
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private $banCache = []; |
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/** |
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* @var null|SecurityManager |
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*/ |
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private $securityManager; |
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public function __construct( |
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PdoDatabase $database, |
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IXffTrustProvider $xffTrustProvider, |
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?SecurityManager $securityManager |
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) { |
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$this->database = $database; |
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$this->xffTrustProvider = $xffTrustProvider; |
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$this->securityManager = $securityManager; |
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} |
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public function isBlockBanned(Request $request): bool |
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{ |
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if (!isset($this->banCache[$request->getId()])) { |
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$this->banCache[$request->getId()] = $this->getBansForRequestFromDatabase($request); |
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} |
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foreach ($this->banCache[$request->getId()] as $ban) { |
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if ($ban->getAction() === Ban::ACTION_BLOCK) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param Request $request |
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* |
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* @return Ban[] |
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*/ |
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public function getBans(Request $request): array |
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{ |
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if (!isset($this->banCache[$request->getId()])) { |
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$this->banCache[$request->getId()] = $this->getBansForRequestFromDatabase($request); |
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} |
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return $this->banCache[$request->getId()]; |
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} |
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public function getBansByTarget(?string $name, ?string $email, ?string $ip, ?int $mask, ?string $useragent) |
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{ |
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/** @noinspection SqlConstantCondition */ |
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$query = <<<SQL |
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SELECT * FROM ban |
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WHERE 1 = 1 |
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AND ((name is null and :nname is null) OR name = :name) |
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AND ((email is null and :nemail is null) OR email = :email) |
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AND ((useragent is null and :nuseragent is null) OR useragent = :useragent) |
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AND ((ip is null and :nip is null) OR ip = inet6_aton(:ip)) |
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AND ((ipmask is null and :nipmask is null) OR ipmask = :ipmask) |
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AND (duration > UNIX_TIMESTAMP() OR duration is null) |
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AND active = 1; |
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SQL; |
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$statement = $this->database->prepare($query); |
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$statement->execute([ |
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':name' => $name, |
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':nname' => $name, |
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':email' => $email, |
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':nemail' => $email, |
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':ip' => $ip, |
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':nip' => $ip, |
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':ipmask' => $mask, |
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':nipmask' => $mask, |
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':useragent' => $useragent, |
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':nuseragent' => $useragent, |
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]); |
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$result = array(); |
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/** @var Ban $v */ |
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foreach ($statement->fetchAll(PDO::FETCH_CLASS, Ban::class) as $v) { |
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$v->setDatabase($this->database); |
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$result[] = $v; |
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} |
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return $result; |
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} |
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public function isActive(Ban $ban): bool |
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{ |
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if (!$ban->isActive()) { |
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return false; |
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} |
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if ($ban->getDuration() !== null && $ban->getDuration() < time()) { |
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return false; |
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} |
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return true; |
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} |
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public function canUnban(Ban $ban): bool |
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{ |
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if ($this->securityManager === null) { |
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return false; |
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} |
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if (!$this->isActive($ban)) { |
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return false; |
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} |
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$user = User::getCurrent($this->database); |
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$allowed = true; |
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$allowed = $allowed && ($ban->getName() === null || $this->securityManager->allows('BanType', 'name', $user) === SecurityManager::ALLOWED); |
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$allowed = $allowed && ($ban->getEmail() === null || $this->securityManager->allows('BanType', 'email', $user) === SecurityManager::ALLOWED); |
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$allowed = $allowed && ($ban->getIp() === null || $this->securityManager->allows('BanType', 'ip', $user) === SecurityManager::ALLOWED); |
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$allowed = $allowed && ($ban->getUseragent() === null || $this->securityManager->allows('BanType', 'useragent', $user) === SecurityManager::ALLOWED); |
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$allowed = $allowed && $this->securityManager->allows('BanVisibility', $ban->getVisibility(), $user) === SecurityManager::ALLOWED; |
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return $allowed; |
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} |
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/** |
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* @param Request $request |
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* |
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* @return Ban[] |
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*/ |
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private function getBansForRequestFromDatabase(Request $request): array |
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{ |
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/** @noinspection SqlConstantCondition - included for clarity of code */ |
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$query = <<<SQL |
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select b.* from ban b |
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left join netmask n on 1 = 1 |
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and n.cidr = b.ipmask |
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and n.protocol = case length(b.ip) when 4 then 4 when 16 then 6 end |
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where 1 = 1 |
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and coalesce(:name rlike name, true) |
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and coalesce(:email rlike email, true) |
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and coalesce(:useragent rlike useragent, true) |
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and case |
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when length(b.ip) = 4 then |
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(conv(hex(b.ip), 16, 10) & n.maskl) = (conv(hex(inet6_aton(:ip4)), 16, 10) & n.maskl) |
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when length(b.ip) = 16 then |
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(conv(left(hex(b.ip), 16), 16, 10) & n.maskh) = (conv(left(hex(inet6_aton(:ip6h)), 16), 16, 10) & n.maskh) |
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and (conv(right(hex(b.ip), 16), 16, 10) & n.maskl) = (conv(right(hex(inet6_aton(:ip6l)), 16), 16, 10) & n.maskl) |
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when length(b.ip) is null then true |
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end |
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and active = 1 |
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and (duration > UNIX_TIMESTAMP() or duration is null) |
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SQL; |
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$statement = $this->database->prepare($query); |
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$trustedIp = $this->xffTrustProvider->getTrustedClientIp($request->getIp(), $request->getForwardedIp()); |
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$statement->execute([ |
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':name' => $request->getName(), |
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':email' => $request->getEmail(), |
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':useragent' => $request->getUserAgent(), |
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':ip4' => $trustedIp, |
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':ip6h' => $trustedIp, |
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':ip6l' => $trustedIp, |
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]); |
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/** @var Ban[] $result */ |
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$result = []; |
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/** @var Ban $v */ |
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foreach ($statement->fetchAll(PDO::FETCH_CLASS, Ban::class) as $v) { |
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$v->setDatabase($this->database); |
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$result[] = $v; |
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} |
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return $result; |
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} |
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} |
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enwikipedia-acc /
waca
