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<?php |
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/** |
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* SocialConnect project |
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* @author: Patsura Dmitry https://github.com/ovr <[email protected]> |
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*/ |
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namespace SocialConnect\OAuth2; |
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use InvalidArgumentException; |
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use SocialConnect\OAuth2\Exception\InvalidState; |
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use SocialConnect\OAuth2\Exception\Unauthorized; |
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use SocialConnect\OAuth2\Exception\UnknownAuthorization; |
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use SocialConnect\OAuth2\Exception\UnknownState; |
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use SocialConnect\Provider\AbstractBaseProvider; |
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use SocialConnect\Provider\Exception\InvalidAccessToken; |
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use SocialConnect\Provider\Exception\InvalidResponse; |
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use SocialConnect\Common\Http\Client\Client; |
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abstract class AbstractProvider extends AbstractBaseProvider |
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{ |
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/** |
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* HTTP method for access token request |
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* |
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* @var string |
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*/ |
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protected $requestHttpMethod = Client::POST; |
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/** |
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* @return string |
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*/ |
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abstract public function getAuthorizeUri(); |
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/** |
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* @return string |
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*/ |
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abstract public function getRequestTokenUri(); |
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/** |
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* Default parameters for auth url, can be redeclared inside implementation of the Provider |
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* |
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* @return array |
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*/ |
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public function getAuthUrlParameters() |
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{ |
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return [ |
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'client_id' => $this->consumer->getKey(), |
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'redirect_uri' => $this->getRedirectUrl(), |
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'response_type' => 'code', |
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]; |
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} |
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/** |
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* 16 bytes / 128 bit / 16 symbols / 32 symbols in hex |
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*/ |
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const STATE_BYTES = 16; |
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/** |
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* @return string |
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*/ |
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protected function generateState() |
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{ |
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return bin2hex(random_bytes(self::STATE_BYTES)); |
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} |
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/** |
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* @return string |
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*/ |
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public function makeAuthUrl() |
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{ |
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$urlParameters = $this->getAuthUrlParameters(); |
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$this->session->set( |
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'oauth2_state', |
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$urlParameters['state'] = $this->generateState() |
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); |
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if (count($this->scope) > 0) { |
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$urlParameters['scope'] = $this->getScopeInline(); |
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} |
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if (count($this->fields) > 0) { |
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$urlParameters['fields'] = $this->getFieldsInline(); |
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} |
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return $this->getAuthorizeUri() . '?' . http_build_query($urlParameters); |
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} |
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/** |
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* Parse access token from response's $body |
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* |
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* @param string|bool $body |
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* @return AccessToken |
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* @throws InvalidAccessToken |
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*/ |
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public function parseToken($body) |
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{ |
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if (empty($body)) { |
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throw new InvalidAccessToken('Provider response with empty body'); |
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} |
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parse_str($body, $token); |
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if (!is_array($token) || !isset($token['access_token'])) { |
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throw new InvalidAccessToken('Provider API returned an unexpected response'); |
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} |
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return new AccessToken($token); |
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} |
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/** |
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* @param string $code |
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* @return \SocialConnect\Common\Http\Request |
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*/ |
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protected function makeAccessTokenRequest($code) |
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{ |
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$parameters = [ |
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'client_id' => $this->consumer->getKey(), |
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'client_secret' => $this->consumer->getSecret(), |
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'code' => $code, |
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'grant_type' => 'authorization_code', |
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'redirect_uri' => $this->getRedirectUrl() |
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]; |
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return new \SocialConnect\Common\Http\Request( |
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$this->getRequestTokenUri(), |
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$parameters, |
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$this->requestHttpMethod, |
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[ |
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'Content-Type' => 'application/x-www-form-urlencoded' |
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] |
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); |
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} |
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/** |
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* @param string $code |
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* @return AccessToken |
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* @throws InvalidResponse |
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*/ |
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public function getAccessToken($code) |
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{ |
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if (!is_string($code)) { |
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throw new InvalidArgumentException('Parameter $code must be a string'); |
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} |
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$response = $this->httpClient->fromRequest( |
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$this->makeAccessTokenRequest($code) |
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); |
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if (!$response->isSuccess()) { |
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throw new InvalidResponse( |
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'API response with error code', |
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$response |
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); |
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} |
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$body = $response->getBody(); |
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return $this->parseToken($body); |
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} |
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/** |
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* @param array $parameters |
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* @return AccessToken |
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* @throws \SocialConnect\OAuth2\Exception\InvalidState |
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* @throws \SocialConnect\OAuth2\Exception\UnknownState |
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* @throws \SocialConnect\OAuth2\Exception\UnknownAuthorization |
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*/ |
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public function getAccessTokenByRequestParameters(array $parameters) |
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{ |
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$state = $this->session->get('oauth2_state'); |
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if (!$state) { |
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throw new UnknownAuthorization(); |
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} |
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if (isset($parameters['error']) && $parameters['error'] === 'access_denied') { |
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throw new Unauthorized(); |
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} |
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if (!isset($parameters['state'])) { |
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throw new UnknownState(); |
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} |
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if ($state !== $parameters['state']) { |
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throw new InvalidState(); |
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} |
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if (!isset($parameters['code'])) { |
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throw new Unauthorized('Unknown code'); |
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} |
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return $this->getAccessToken($parameters['code']); |
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} |
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} |
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SocialConnect /
auth
