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- <?php
- if (!class_exists('OAuthException')) {
- class OAuthException extends Exception {
-
- }
- }
- class OAuthConsumer {
- public $key;
- public $secret;
- function __construct($key, $secret, $callback_url=NULL) {
- $this->key = $key;
- $this->secret = $secret;
- $this->callback_url = $callback_url;
- }
- function __toString() {
- return "OAuthConsumer[key=$this->key,secret=$this->secret]";
- }
- }
- class OAuthToken {
-
- public $key;
- public $secret;
-
- function __construct($key, $secret) {
- $this->key = $key;
- $this->secret = $secret;
- }
-
- function to_string() {
- return "oauth_token=" .
- OAuthUtil::urlencode_rfc3986($this->key) .
- "&oauth_token_secret=" .
- OAuthUtil::urlencode_rfc3986($this->secret);
- }
- function __toString() {
- return $this->to_string();
- }
- }
- abstract class OAuthSignatureMethod {
-
- abstract public function get_name();
-
- abstract public function build_signature($request, $consumer, $token);
-
- public function check_signature($request, $consumer, $token, $signature) {
- $built = $this->build_signature($request, $consumer, $token);
-
- if (strlen($built) == 0 || strlen($signature) == 0) {
- return false;
- }
- if (strlen($built) != strlen($signature)) {
- return false;
- }
-
- $result = 0;
- for ($i = 0; $i < strlen($signature); $i++) {
- $result |= ord($built{$i}) ^ ord($signature{$i});
- }
- return $result == 0;
- }
- }
- class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod {
- function get_name() {
- return "HMAC-SHA1";
- }
- public function build_signature($request, $consumer, $token) {
- $base_string = $request->get_signature_base_string();
- $request->base_string = $base_string;
- $key_parts = array(
- $consumer->secret,
- ($token) ? $token->secret : ""
- );
- $key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
- $key = implode('&', $key_parts);
- return base64_encode(hash_hmac('sha1', $base_string, $key, true));
- }
- }
- class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod {
- public function get_name() {
- return "PLAINTEXT";
- }
-
- public function build_signature($request, $consumer, $token) {
- $key_parts = array(
- $consumer->secret,
- ($token) ? $token->secret : ""
- );
- $key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
- $key = implode('&', $key_parts);
- $request->base_string = $key;
- return $key;
- }
- }
- abstract class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod {
- public function get_name() {
- return "RSA-SHA1";
- }
-
-
-
-
-
-
- protected abstract function fetch_public_cert(&$request);
-
-
-
-
- protected abstract function fetch_private_cert(&$request);
- public function build_signature($request, $consumer, $token) {
- $base_string = $request->get_signature_base_string();
- $request->base_string = $base_string;
-
- $cert = $this->fetch_private_cert($request);
-
- $privatekeyid = openssl_get_privatekey($cert);
-
- $ok = openssl_sign($base_string, $signature, $privatekeyid);
-
- openssl_free_key($privatekeyid);
- return base64_encode($signature);
- }
- public function check_signature($request, $consumer, $token, $signature) {
- $decoded_sig = base64_decode($signature);
- $base_string = $request->get_signature_base_string();
-
- $cert = $this->fetch_public_cert($request);
-
- $publickeyid = openssl_get_publickey($cert);
-
- $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
-
- openssl_free_key($publickeyid);
- return $ok == 1;
- }
- }
- class OAuthRequest {
- protected $parameters;
- protected $http_method;
- protected $http_url;
-
- public $base_string;
- public static $version = '1.0';
- public static $POST_INPUT = 'php://input';
- function __construct($http_method, $http_url, $parameters=NULL) {
- $parameters = ($parameters) ? $parameters : array();
- $parameters = array_merge( OAuthUtil::parse_parameters(parse_url($http_url, PHP_URL_QUERY)), $parameters);
- $this->parameters = $parameters;
- $this->http_method = $http_method;
- $this->http_url = $http_url;
- }
-
- public static function from_request($http_method=NULL, $http_url=NULL, $parameters=NULL) {
- $scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on")
- ? 'http'
- : 'https';
- $http_url = ($http_url) ? $http_url : $scheme .
- '://' . $_SERVER['SERVER_NAME'] .
- ':' .
- $_SERVER['SERVER_PORT'] .
- $_SERVER['REQUEST_URI'];
- $http_method = ($http_method) ? $http_method : $_SERVER['REQUEST_METHOD'];
-
-
-
-
- if (!$parameters) {
-
- $request_headers = OAuthUtil::get_headers();
-
- $parameters = OAuthUtil::parse_parameters($_SERVER['QUERY_STRING']);
-
-
- if ($http_method == "POST"
- && isset($request_headers['Content-Type'])
- && strstr($request_headers['Content-Type'],
- 'application/x-www-form-urlencoded')
- ) {
- $post_data = OAuthUtil::parse_parameters(
- file_get_contents(self::$POST_INPUT)
- );
- $parameters = array_merge($parameters, $post_data);
- }
-
-
- if (isset($request_headers['Authorization']) && substr($request_headers['Authorization'], 0, 6) == 'OAuth ') {
- $header_parameters = OAuthUtil::split_header(
- $request_headers['Authorization']
- );
- $parameters = array_merge($parameters, $header_parameters);
- }
- }
- return new OAuthRequest($http_method, $http_url, $parameters);
- }
-
- public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters=NULL) {
- $parameters = ($parameters) ? $parameters : array();
- $defaults = array("oauth_version" => OAuthRequest::$version,
- "oauth_nonce" => OAuthRequest::generate_nonce(),
- "oauth_timestamp" => OAuthRequest::generate_timestamp(),
- "oauth_consumer_key" => $consumer->key);
- if ($token)
- $defaults['oauth_token'] = $token->key;
- $parameters = array_merge($defaults, $parameters);
- return new OAuthRequest($http_method, $http_url, $parameters);
- }
- public function set_parameter($name, $value, $allow_duplicates = true) {
- if ($allow_duplicates && isset($this->parameters[$name])) {
-
- if (is_scalar($this->parameters[$name])) {
-
-
- $this->parameters[$name] = array($this->parameters[$name]);
- }
- $this->parameters[$name][] = $value;
- } else {
- $this->parameters[$name] = $value;
- }
- }
- public function get_parameter($name) {
- return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
- }
- public function get_parameters() {
- return $this->parameters;
- }
- public function unset_parameter($name) {
- unset($this->parameters[$name]);
- }
-
- public function get_signable_parameters() {
-
- $params = $this->parameters;
-
-
- if (isset($params['oauth_signature'])) {
- unset($params['oauth_signature']);
- }
- return OAuthUtil::build_http_query($params);
- }
-
- public function get_signature_base_string() {
- $parts = array(
- $this->get_normalized_http_method(),
- $this->get_normalized_http_url(),
- $this->get_signable_parameters()
- );
- $parts = OAuthUtil::urlencode_rfc3986($parts);
- return implode('&', $parts);
- }
-
- public function get_normalized_http_method() {
- return strtoupper($this->http_method);
- }
-
- public function get_normalized_http_url() {
- $parts = parse_url($this->http_url);
- $scheme = (isset($parts['scheme'])) ? $parts['scheme'] : 'http';
- $port = (isset($parts['port'])) ? $parts['port'] : (($scheme == 'https') ? '443' : '80');
- $host = (isset($parts['host'])) ? strtolower($parts['host']) : '';
- $path = (isset($parts['path'])) ? $parts['path'] : '';
- if (($scheme == 'https' && $port != '443')
- || ($scheme == 'http' && $port != '80')) {
- $host = "$host:$port";
- }
- return "$scheme://$host$path";
- }
-
- public function to_url() {
- $post_data = $this->to_postdata();
- $out = $this->get_normalized_http_url();
- if ($post_data) {
- $out .= '?'.$post_data;
- }
- return $out;
- }
-
- public function to_postdata() {
- return OAuthUtil::build_http_query($this->parameters);
- }
-
- public function to_header($realm=null) {
- $first = true;
- if($realm) {
- $out = 'Authorization: OAuth realm="' . OAuthUtil::urlencode_rfc3986($realm) . '"';
- $first = false;
- } else
- $out = 'Authorization: OAuth';
- $total = array();
- foreach ($this->parameters as $k => $v) {
- if (substr($k, 0, 5) != "oauth") continue;
- if (is_array($v)) {
- throw new OAuthException('Arrays not supported in headers');
- }
- $out .= ($first) ? ' ' : ',';
- $out .= OAuthUtil::urlencode_rfc3986($k) .
- '="' .
- OAuthUtil::urlencode_rfc3986($v) .
- '"';
- $first = false;
- }
- return $out;
- }
- public function __toString() {
- return $this->to_url();
- }
- public function sign_request($signature_method, $consumer, $token) {
- $this->set_parameter(
- "oauth_signature_method",
- $signature_method->get_name(),
- false
- );
- $signature = $this->build_signature($signature_method, $consumer, $token);
- $this->set_parameter("oauth_signature", $signature, false);
- }
- public function build_signature($signature_method, $consumer, $token) {
- $signature = $signature_method->build_signature($this, $consumer, $token);
- return $signature;
- }
-
- private static function generate_timestamp() {
- return time();
- }
-
- private static function generate_nonce() {
- $mt = microtime();
- $rand = mt_rand();
- return md5($mt . $rand);
- }
- }
- class OAuthServer {
- protected $timestamp_threshold = 300;
- protected $version = '1.0';
- protected $signature_methods = array();
- protected $data_store;
- function __construct($data_store) {
- $this->data_store = $data_store;
- }
- public function add_signature_method($signature_method) {
- $this->signature_methods[$signature_method->get_name()] =
- $signature_method;
- }
-
-
- public function fetch_request_token(&$request) {
- $this->get_version($request);
- $consumer = $this->get_consumer($request);
-
- $token = NULL;
- $this->check_signature($request, $consumer, $token);
-
- $callback = $request->get_parameter('oauth_callback');
- $new_token = $this->data_store->new_request_token($consumer, $callback);
- return $new_token;
- }
-
- public function fetch_access_token(&$request) {
- $this->get_version($request);
- $consumer = $this->get_consumer($request);
-
- $token = $this->get_token($request, $consumer, "request");
- $this->check_signature($request, $consumer, $token);
-
- $verifier = $request->get_parameter('oauth_verifier');
- $new_token = $this->data_store->new_access_token($token, $consumer, $verifier);
- return $new_token;
- }
-
- public function verify_request(&$request) {
- $this->get_version($request);
- $consumer = $this->get_consumer($request);
- $token = $this->get_token($request, $consumer, "access");
- $this->check_signature($request, $consumer, $token);
- return array($consumer, $token);
- }
-
-
- private function get_version(&$request) {
- $version = $request->get_parameter("oauth_version");
- if (!$version) {
-
-
- $version = '1.0';
- }
- if ($version !== $this->version) {
- throw new OAuthException("OAuth version '$version' not supported");
- }
- return $version;
- }
-
- private function get_signature_method($request) {
- $signature_method = $request instanceof OAuthRequest
- ? $request->get_parameter("oauth_signature_method")
- : NULL;
- if (!$signature_method) {
-
-
- throw new OAuthException('No signature method parameter. This parameter is required');
- }
- if (!in_array($signature_method,
- array_keys($this->signature_methods))) {
- throw new OAuthException(
- "Signature method '$signature_method' not supported " .
- "try one of the following: " .
- implode(", ", array_keys($this->signature_methods))
- );
- }
- return $this->signature_methods[$signature_method];
- }
-
- private function get_consumer($request) {
- $consumer_key = $request instanceof OAuthRequest
- ? $request->get_parameter("oauth_consumer_key")
- : NULL;
- if (!$consumer_key) {
- throw new OAuthException("Invalid consumer key");
- }
- $consumer = $this->data_store->lookup_consumer($consumer_key);
- if (!$consumer) {
- throw new OAuthException("Invalid consumer");
- }
- return $consumer;
- }
-
- private function get_token($request, $consumer, $token_type="access") {
- $token_field = $request instanceof OAuthRequest
- ? $request->get_parameter('oauth_token')
- : NULL;
- $token = $this->data_store->lookup_token(
- $consumer, $token_type, $token_field
- );
- if (!$token) {
- throw new OAuthException("Invalid $token_type token: $token_field");
- }
- return $token;
- }
-
- private function check_signature($request, $consumer, $token) {
-
- $timestamp = $request instanceof OAuthRequest
- ? $request->get_parameter('oauth_timestamp')
- : NULL;
- $nonce = $request instanceof OAuthRequest
- ? $request->get_parameter('oauth_nonce')
- : NULL;
- $this->check_timestamp($timestamp);
- $this->check_nonce($consumer, $token, $nonce, $timestamp);
- $signature_method = $this->get_signature_method($request);
- $signature = $request->get_parameter('oauth_signature');
- $valid_sig = $signature_method->check_signature(
- $request,
- $consumer,
- $token,
- $signature
- );
- if (!$valid_sig) {
- throw new OAuthException("Invalid signature");
- }
- }
-
- private function check_timestamp($timestamp) {
- if( ! $timestamp )
- throw new OAuthException(
- 'Missing timestamp parameter. The parameter is required'
- );
-
- $now = time();
- if (abs($now - $timestamp) > $this->timestamp_threshold) {
- throw new OAuthException(
- "Expired timestamp, yours $timestamp, ours $now"
- );
- }
- }
-
- private function check_nonce($consumer, $token, $nonce, $timestamp) {
- if( ! $nonce )
- throw new OAuthException(
- 'Missing nonce parameter. The parameter is required'
- );
-
- $found = $this->data_store->lookup_nonce(
- $consumer,
- $token,
- $nonce,
- $timestamp
- );
- if ($found) {
- throw new OAuthException("Nonce already used: $nonce");
- }
- }
- }
- class OAuthDataStore {
- function lookup_consumer($consumer_key) {
-
- }
- function lookup_token($consumer, $token_type, $token) {
-
- }
- function lookup_nonce($consumer, $token, $nonce, $timestamp) {
-
- }
- function new_request_token($consumer, $callback = null) {
-
- }
- function new_access_token($token, $consumer, $verifier = null) {
-
-
-
-
- }
- }
- class OAuthUtil {
- public static function urlencode_rfc3986($input) {
- if (is_array($input)) {
- return array_map(array('OAuthUtil', 'urlencode_rfc3986'), $input);
- } else if (is_scalar($input)) {
- return str_replace(
- '+',
- ' ',
- str_replace('%7E', '~', rawurlencode($input))
- );
- } else {
- return '';
- }
- }
-
-
-
- public static function urldecode_rfc3986($string) {
- return urldecode($string);
- }
-
-
-
-
- public static function split_header($header, $only_allow_oauth_parameters = true) {
- $params = array();
- if (preg_match_all('/('.($only_allow_oauth_parameters ? 'oauth_' : '').'[a-z_-]*)=(:?"([^"]*)"|([^,]*))/', $header, $matches)) {
- foreach ($matches[1] as $i => $h) {
- $params[$h] = OAuthUtil::urldecode_rfc3986(empty($matches[3][$i]) ? $matches[4][$i] : $matches[3][$i]);
- }
- if (isset($params['realm'])) {
- unset($params['realm']);
- }
- }
- return $params;
- }
-
- public static function get_headers() {
- if (function_exists('apache_request_headers')) {
-
-
- $headers = apache_request_headers();
-
-
-
-
- $out = array();
- foreach ($headers AS $key => $value) {
- $key = str_replace(
- " ",
- "-",
- ucwords(strtolower(str_replace("-", " ", $key)))
- );
- $out[$key] = $value;
- }
- } else {
-
-
- $out = array();
- if( isset($_SERVER['CONTENT_TYPE']) )
- $out['Content-Type'] = $_SERVER['CONTENT_TYPE'];
- if( isset($_ENV['CONTENT_TYPE']) )
- $out['Content-Type'] = $_ENV['CONTENT_TYPE'];
- foreach ($_SERVER as $key => $value) {
- if (substr($key, 0, 5) == "HTTP_") {
-
-
-
- $key = str_replace(
- " ",
- "-",
- ucwords(strtolower(str_replace("_", " ", substr($key, 5))))
- );
- $out[$key] = $value;
- }
- }
- }
- return $out;
- }
-
-
-
- public static function parse_parameters( $input ) {
- if (!isset($input) || !$input) return array();
- $pairs = explode('&', $input);
- $parsed_parameters = array();
- foreach ($pairs as $pair) {
- $split = explode('=', $pair, 2);
- $parameter = OAuthUtil::urldecode_rfc3986($split[0]);
- $value = isset($split[1]) ? OAuthUtil::urldecode_rfc3986($split[1]) : '';
- if (isset($parsed_parameters[$parameter])) {
-
-
- if (is_scalar($parsed_parameters[$parameter])) {
-
-
- $parsed_parameters[$parameter] = array($parsed_parameters[$parameter]);
- }
- $parsed_parameters[$parameter][] = $value;
- } else {
- $parsed_parameters[$parameter] = $value;
- }
- }
- return $parsed_parameters;
- }
- public static function build_http_query($params) {
- if (!$params) return '';
-
- $keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
- $values = OAuthUtil::urlencode_rfc3986(array_values($params));
- $params = array_combine($keys, $values);
-
-
- uksort($params, 'strcmp');
- $pairs = array();
- foreach ($params as $parameter => $value) {
- if (is_array($value)) {
-
-
-
- sort($value, SORT_STRING);
- foreach ($value as $duplicate_value) {
- $pairs[] = $parameter . '=' . $duplicate_value;
- }
- } else {
- $pairs[] = $parameter . '=' . $value;
- }
- }
-
-
- return implode('&', $pairs);
- }
- }
- ?>
|