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AbstractProvider.php
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AbstractProvider.php
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<?php
/**
* SocialConnect project
* @author: Patsura Dmitry https://github.com/ovr <[email protected]>
*/
declare(strict_types=1);
namespace SocialConnect\OpenID;
use SocialConnect\Common\Exception\Unsupported;
use SocialConnect\OpenID\Exception\Unauthorized;
use SocialConnect\Provider\AbstractBaseProvider;
use SocialConnect\Provider\Consumer;
use SocialConnect\Provider\Exception\InvalidAccessToken;
use SocialConnect\Provider\Exception\InvalidResponse;
abstract class AbstractProvider extends AbstractBaseProvider
{
/**
* @return string
*/
abstract public function getOpenIdUrl();
/**
* @var int
*/
protected $version;
/**
* @var string
*/
protected $loginEntrypoint;
/**
* @param bool $immediate
* @return string
*/
protected function makeAuthUrlV2($immediate)
{
$params = [
'openid.ns' => 'http://specs.openid.net/auth/2.0',
'openid.mode' => $immediate ? 'checkid_immediate' : 'checkid_setup',
'openid.return_to' => $this->getRedirectUrl(),
'openid.realm' => $this->getRedirectUrl()
];
$params['openid.ns.sreg'] = 'http://openid.net/extensions/sreg/1.1';
$params['openid.identity'] = $params['openid.claimed_id'] = 'http://specs.openid.net/auth/2.0/identifier_select';
return $this->loginEntrypoint . '?' . http_build_query($params, '', '&');
}
/**
* @param string $url
* @return string
* @throws InvalidResponse
* @throws \Psr\Http\Client\ClientExceptionInterface
*/
protected function discover(string $url)
{
$response = $this->executeRequest(
$this->httpStack->createRequest('GET', $url)
);
$contentType = $response->getHeaderLine('Content-Type');
if (strpos($contentType, 'application/xrds+xml;charset=utf-8') === false) {
throw new InvalidResponse(
'Unexpected Content-Type',
$response
);
}
$xml = new \SimpleXMLElement($response->getBody()->getContents());
$this->version = 2;
$this->loginEntrypoint = $xml->XRD->Service->URI;
return $this->getOpenIdUrl();
}
/**
* {@inheritdoc}
*/
public function makeAuthUrl(): string
{
$this->discover($this->getOpenIdUrl());
return $this->makeAuthUrlV2(false);
}
/**
* @param string $identity
* @return string
*/
abstract protected function parseUserIdFromIdentity($identity): string;
protected function getRequiredRequestParameter(array $requestParameters, string $key)
{
if (isset($requestParameters[$key])) {
return $requestParameters[$key];
}
throw new Unauthorized("There is no required parameter called: '${key}'");
}
/**
* @param string $nonce
* @return int
* @throws Unauthorized
*/
protected function splitNonce(string $nonce): int
{
$result = preg_match('/(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)Z(.*)/', $nonce, $matches);
if ($result !== 1 || count($matches) !== 8) {
throw new Unauthorized('Unexpected nonce format');
}
list(,$year, $month, $day, $hour, $min, $sec) = $matches;
try {
$timestamp = new \DateTime();
$timestamp->setDate((int) $year, (int) $month, (int) $day);
$timestamp->setTime((int) $hour, (int) $min, (int) $sec);
} catch (\Throwable $e) {
throw new Unauthorized('Timestamp from nonce is not valid', $e->getCode(), $e);
}
return $timestamp->getTimestamp();
}
/**
* @param string $nonce
* @return void
* @throws Unauthorized
*/
protected function checkNonce(string $nonce): void
{
$stamp = $this->splitNonce($nonce);
$skew = 60;
$now = time();
if ($stamp <= $now - $skew) {
throw new Unauthorized("Timestamp from nonce is earlier then time() - {$skew}s");
}
if ($stamp >= $now + $skew) {
throw new Unauthorized("Timestamp from nonce is older then time() + {$skew}s");
}
}
/**
* @link http://openid.net/specs/openid-authentication-2_0.html#verification
*
* @param array $requestParameters
* @return AccessToken
* @throws InvalidAccessToken
* @throws InvalidResponse
* @throws Unauthorized
* @throws \Psr\Http\Client\ClientExceptionInterface
*/
public function getAccessTokenByRequestParameters(array $requestParameters)
{
$nonce = $this->getRequiredRequestParameter($requestParameters, 'openid_response_nonce');
$this->checkNonce($nonce);
$params = [
'openid.assoc_handle' => $this->getRequiredRequestParameter($requestParameters, 'openid_assoc_handle'),
'openid.signed' => $this->getRequiredRequestParameter($requestParameters, 'openid_signed'),
'openid.sig' => $this->getRequiredRequestParameter($requestParameters, 'openid_sig'),
'openid.ns' => $this->getRequiredRequestParameter($requestParameters, 'openid_ns'),
'openid.op_endpoint' => $requestParameters['openid_op_endpoint'],
'openid.claimed_id' => $requestParameters['openid_claimed_id'],
'openid.identity' => $requestParameters['openid_identity'],
'openid.return_to' => $this->getRedirectUrl(),
'openid.response_nonce' => $nonce,
'openid.mode' => 'check_authentication'
];
if (isset($requestParameters['openid_claimed_id'])) {
$claimedId = $requestParameters['openid_claimed_id'];
} else {
$claimedId = $requestParameters['openid_identity'];
}
$this->discover($claimedId);
$response = $this->executeRequest(
$this->httpStack->createRequest('POST', $this->loginEntrypoint)
->withHeader('Content-Type', 'application/x-www-form-urlencoded')
->withBody($this->httpStack->createStream(http_build_query($params, '', '&')))
);
$content = $response->getBody()->getContents();
if (preg_match('/is_valid\s*:\s*true/i', $content)) {
return new AccessToken(
$requestParameters['openid_identity'],
$this->parseUserIdFromIdentity(
$requestParameters['openid_identity']
)
);
}
throw new InvalidAccessToken;
}
/**
* {@inheritDoc}
*/
protected function createConsumer(array $parameters): Consumer
{
return new Consumer(
$this->getRequiredStringParameter('applicationId', $parameters),
''
);
}
/**
* {@inheritDoc}
*/
public function createAccessToken(array $information)
{
throw new Unsupported('It\'s usefull to use this method for OpenID, are you sure?');
}
}