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<?php |
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namespace Tomaj\NetteApi\Authorization; |
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use Tomaj\NetteApi\Misc\BearerTokenRepositoryInterface; |
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use Tomaj\NetteApi\Misc\IpDetectorInterface; |
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class BearerTokenAuthorization implements ApiAuthorizationInterface |
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{ |
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/** |
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* @var BearerTokenRepositoryInterface |
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*/ |
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private $tokenRepository; |
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/** |
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* @var string|null |
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*/ |
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private $errorMessage = null; |
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/** |
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* @var IpDetectorInterface |
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*/ |
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private $ipDetector; |
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/** |
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* BearerTokenAuthorization constructor. |
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* |
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* @param BearerTokenRepositoryInterface $tokenRepository |
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* @param IpDetectorInterface $ipDetector |
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*/ |
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public function __construct(BearerTokenRepositoryInterface $tokenRepository, IpDetectorInterface $ipDetector) |
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{ |
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$this->tokenRepository = $tokenRepository; |
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$this->ipDetector = $ipDetector; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function authorized(): bool |
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{ |
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$token = $this->readAuthorizationToken(); |
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if ($token === null) { |
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return false; |
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} |
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$result = $this->tokenRepository->validToken($token); |
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if (!$result) { |
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$this->errorMessage = 'Token doesn\'t exists or isn\'t active'; |
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return false; |
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} |
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if (!$this->isValidIp($this->tokenRepository->ipRestrictions($token))) { |
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$this->errorMessage = 'Invalid IP'; |
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return false; |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getErrorMessage(): ?string |
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{ |
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return $this->errorMessage; |
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} |
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/** |
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* Check if actual IP from detector satisfies @ipRestristions |
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* $ipRestrictions should contains multiple formats: |
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* '*' - accessible from anywhare |
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* '127.0.0.1' - accessible from single IP |
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* '127.0.0.1,127.0.02' - accessible from multiple IP, separator could be new line or space |
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* '127.0.0.1/32' - accessible from ip range |
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* null - disabled access |
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* |
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* @return boolean |
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*/ |
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private function isValidIp(?string $ipRestrictions): bool |
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{ |
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if ($ipRestrictions === null) { |
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return false; |
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} |
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if ($ipRestrictions === '*' || $ipRestrictions === '') { |
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return true; |
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} |
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$ip = $this->ipDetector->getRequestIp(); |
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$ipWhiteList = str_replace([',', ' ', "\n"], '#', $ipRestrictions); |
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$ipWhiteList = explode('#', $ipWhiteList); |
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foreach ($ipWhiteList as $whiteIp) { |
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if ($whiteIp === $ip) { |
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return true; |
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} |
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if (strpos($whiteIp, '/') !== false) { |
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return $this->ipInRange($ip, $whiteIp); |
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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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* Check if IP is in $range |
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* |
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* @param string $ip this ip will be verified |
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* @param string $range is in IP/CIDR format eg 127.0.0.1/24 |
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* @return boolean |
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*/ |
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private function ipInRange(string $ip, string $range): bool |
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{ |
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list($range, $netmask) = explode('/', $range, 2); |
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$range_decimal = ip2long($range); |
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$ipDecimal = ip2long($ip); |
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$wildcard_decimal = pow(2, (32 - (int)$netmask)) - 1; |
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$netmask_decimal = ~ $wildcard_decimal; |
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return (($ipDecimal & $netmask_decimal) === ($range_decimal & $netmask_decimal)); |
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} |
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/** |
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* Read HTTP reader with authorization token |
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* If everything is ok, it return token. In other situations returns false and set errorMessage. |
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* |
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* @return string|null |
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*/ |
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private function readAuthorizationToken(): ?string |
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{ |
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if (!isset($_SERVER['HTTP_AUTHORIZATION'])) { |
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$this->errorMessage = 'Authorization header HTTP_Authorization is not set'; |
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return null; |
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} |
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$parts = explode(' ', $_SERVER['HTTP_AUTHORIZATION']); |
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if (count($parts) !== 2) { |
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$this->errorMessage = 'Authorization header contains invalid structure'; |
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return null; |
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} |
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if (strtolower($parts[0]) !== 'bearer') { |
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$this->errorMessage = 'Authorization header doesn\'t contains bearer token'; |
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return null; |
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} |
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return $parts[1]; |
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} |
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} |
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tomaj /
nette-api
