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<?php |
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/** |
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* @copyright Copyright (c) 2016 Joas Schilling <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OCA\WorkflowEngine\Check; |
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use OCP\IL10N; |
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use OCP\IRequest; |
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use OCP\WorkflowEngine\ICheck; |
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class RequestRemoteAddress implements ICheck { |
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/** @var IL10N */ |
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protected $l; |
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/** @var IRequest */ |
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protected $request; |
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/** |
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* @param IL10N $l |
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* @param IRequest $request |
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*/ |
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public function __construct(IL10N $l, IRequest $request) { |
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$this->l = $l; |
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$this->request = $request; |
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} |
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/** |
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* @param string $operator |
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* @param string $value |
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* @return bool |
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*/ |
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public function executeCheck($operator, $value) { |
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$actualValue = $this->request->getRemoteAddress(); |
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$decodedValue = explode('/', $value); |
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if ($operator === 'matchesIPv4') { |
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return $this->matchIPv4($actualValue, $decodedValue[0], $decodedValue[1]); |
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} else if ($operator === '!matchesIPv4') { |
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return !$this->matchIPv4($actualValue, $decodedValue[0], $decodedValue[1]); |
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} else if ($operator === 'matchesIPv6') { |
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return $this->matchIPv6($actualValue, $decodedValue[0], $decodedValue[1]); |
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} else { |
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return !$this->matchIPv6($actualValue, $decodedValue[0], $decodedValue[1]); |
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} |
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} |
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/** |
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* @param string $operator |
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* @param string $value |
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* @throws \UnexpectedValueException |
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*/ |
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public function validateCheck($operator, $value) { |
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if (!in_array($operator, ['matchesIPv4', '!matchesIPv4', 'matchesIPv6', '!matchesIPv6'])) { |
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throw new \UnexpectedValueException($this->l->t('The given operator is invalid'), 1); |
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} |
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$decodedValue = explode('/', $value); |
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if (count($decodedValue) !== 2) { |
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throw new \UnexpectedValueException($this->l->t('The given IP range is invalid'), 2); |
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} |
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if (in_array($operator, ['matchesIPv4', '!matchesIPv4'])) { |
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if (!filter_var($decodedValue[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { |
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throw new \UnexpectedValueException($this->l->t('The given IP range is not valid for IPv4'), 3); |
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} |
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if ($decodedValue[1] > 32 || $decodedValue[1] <= 0) { |
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throw new \UnexpectedValueException($this->l->t('The given IP range is not valid for IPv4'), 4); |
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} |
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} else { |
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if (!filter_var($decodedValue[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) { |
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throw new \UnexpectedValueException($this->l->t('The given IP range is not valid for IPv6'), 3); |
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} |
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if ($decodedValue[1] > 128 || $decodedValue[1] <= 0) { |
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throw new \UnexpectedValueException($this->l->t('The given IP range is not valid for IPv6'), 4); |
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} |
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} |
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} |
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/** |
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* Based on http://stackoverflow.com/a/594134 |
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* @param string $ip |
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* @param string $rangeIp |
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* @param int $bits |
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* @return bool |
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*/ |
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protected function matchIPv4($ip, $rangeIp, $bits) { |
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$rangeDecimal = ip2long($rangeIp); |
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$ipDecimal = ip2long($ip); |
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$mask = -1 << (32 - $bits); |
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return ($ipDecimal & $mask) === ($rangeDecimal & $mask); |
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} |
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/** |
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* Based on http://stackoverflow.com/a/7951507 |
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* @param string $ip |
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* @param string $rangeIp |
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* @param int $bits |
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* @return bool |
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*/ |
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protected function matchIPv6($ip, $rangeIp, $bits) { |
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$ipNet = inet_pton($ip); |
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$binaryIp = $this->ipv6ToBits($ipNet); |
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$ipNetBits = substr($binaryIp, 0, $bits); |
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$rangeNet = inet_pton($rangeIp); |
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$binaryRange = $this->ipv6ToBits($rangeNet); |
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$rangeNetBits = substr($binaryRange, 0, $bits); |
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return $ipNetBits === $rangeNetBits; |
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} |
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/** |
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* Based on http://stackoverflow.com/a/7951507 |
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* @param string $packedIp |
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* @return string |
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*/ |
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protected function ipv6ToBits($packedIp) { |
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$unpackedIp = unpack('A16', $packedIp); |
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$unpackedIp = str_split($unpackedIp[1]); |
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$binaryIp = ''; |
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foreach ($unpackedIp as $char) { |
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$binaryIp .= str_pad(decbin(ord($char)), 8, '0', STR_PAD_LEFT); |
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} |
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return str_pad($binaryIp, 128, '0', STR_PAD_RIGHT); |
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} |
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/** |
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* returns a list of Entities the checker supports. The values must match |
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* the class name of the entity. |
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* |
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* An empty result means the check is universally available. |
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* |
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* @since 18.0.0 |
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*/ |
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public function supportedEntities(): array { |
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return []; |
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} |
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/** |
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* returns whether the operation can be used in the requested scope. |
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* |
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* Scope IDs are defined as constants in OCP\WorkflowEngine\IManager. At |
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* time of writing these are SCOPE_ADMIN and SCOPE_USER. |
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* |
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* For possibly unknown future scopes the recommended behaviour is: if |
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* user scope is permitted, the default behaviour should return `true`, |
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* otherwise `false`. |
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* |
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* @since 18.0.0 |
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*/ |
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public function isAvailableForScope(int $scope): bool { |
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return true; |
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} |
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} |
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nextcloud /
server
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