894 lines
26 KiB
PHP
894 lines
26 KiB
PHP
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<?php
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// vim: foldmethod=marker
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$OAuth_last_computed_signature = false;
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if (!class_exists('OAuthException')) {
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/* Generic exception class
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*/
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class OAuthException extends Exception
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{
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// pass
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}
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}
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class OAuthConsumer
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{
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public $key;
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public $secret;
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function __construct($key, $secret, $callback_url = null)
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{
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$this->key = $key;
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$this->secret = $secret;
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$this->callback_url = $callback_url;
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}
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function __toString()
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{
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return "OAuthConsumer[key=$this->key,secret=$this->secret]";
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}
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}
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class OAuthToken
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{
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// access tokens and request tokens
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public $key;
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public $secret;
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/**
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* key = the token
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* secret = the token secret
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*/
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function __construct($key, $secret)
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{
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$this->key = $key;
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$this->secret = $secret;
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}
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/**
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* generates the basic string serialization of a token that a server
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* would respond to request_token and access_token calls with
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*/
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function to_string()
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{
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return "oauth_token=" .
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OAuthUtil::urlencode_rfc3986($this->key) .
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"&oauth_token_secret=" .
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OAuthUtil::urlencode_rfc3986($this->secret);
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}
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function __toString()
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{
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return $this->to_string();
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}
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}
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class OAuthSignatureMethod
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{
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public function check_signature(&$request, $consumer, $token, $signature)
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{
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$built = $this->build_signature($request, $consumer, $token);
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return $built == $signature;
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}
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}
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class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod
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{
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function get_name()
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{
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return "HMAC-SHA1";
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}
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public function build_signature($request, $consumer, $token)
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{
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global $OAuth_last_computed_signature;
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$OAuth_last_computed_signature = false;
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$base_string = $request->get_signature_base_string();
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$request->base_string = $base_string;
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$key_parts = [
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$consumer->secret,
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($token) ? $token->secret : ""
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];
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$key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
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$key = implode('&', $key_parts);
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$computed_signature = base64_encode(hash_hmac('sha1', $base_string, $key, true));
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$OAuth_last_computed_signature = $computed_signature;
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return $computed_signature;
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}
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}
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class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod
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{
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public function get_name()
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{
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return "PLAINTEXT";
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}
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public function build_signature($request, $consumer, $token)
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{
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$sig = [
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OAuthUtil::urlencode_rfc3986($consumer->secret)
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];
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if ($token) {
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array_push($sig, OAuthUtil::urlencode_rfc3986($token->secret));
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} else {
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array_push($sig, '');
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}
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$raw = implode("&", $sig);
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// for debug purposes
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$request->base_string = $raw;
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return OAuthUtil::urlencode_rfc3986($raw);
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}
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}
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class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod
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{
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public function get_name()
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{
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return "RSA-SHA1";
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}
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protected function fetch_public_cert(&$request)
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{
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// not implemented yet, ideas are:
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// (1) do a lookup in a table of trusted certs keyed off of consumer
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// (2) fetch via http using a url provided by the requester
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// (3) some sort of specific discovery code based on request
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//
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// either way should return a string representation of the certificate
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throw Exception("fetch_public_cert not implemented");
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}
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protected function fetch_private_cert(&$request)
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{
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// not implemented yet, ideas are:
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// (1) do a lookup in a table of trusted certs keyed off of consumer
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//
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// either way should return a string representation of the certificate
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throw Exception("fetch_private_cert not implemented");
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}
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public function build_signature(&$request, $consumer, $token)
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{
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$base_string = $request->get_signature_base_string();
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$request->base_string = $base_string;
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// Fetch the private key cert based on the request
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$cert = $this->fetch_private_cert($request);
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// Pull the private key ID from the certificate
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$privatekeyid = openssl_get_privatekey($cert);
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// Sign using the key
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$ok = openssl_sign($base_string, $signature, $privatekeyid);
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// Release the key resource
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openssl_free_key($privatekeyid);
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return base64_encode($signature);
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}
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public function check_signature(&$request, $consumer, $token, $signature)
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{
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$decoded_sig = base64_decode($signature);
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$base_string = $request->get_signature_base_string();
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// Fetch the public key cert based on the request
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$cert = $this->fetch_public_cert($request);
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// Pull the public key ID from the certificate
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$publickeyid = openssl_get_publickey($cert);
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// Check the computed signature against the one passed in the query
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$ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
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// Release the key resource
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openssl_free_key($publickeyid);
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return $ok == 1;
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}
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}
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class OAuthRequest
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{
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private $parameters;
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private $http_method;
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private $http_url;
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// for debug purposes
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public $base_string;
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public static $version = '1.0';
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public static $POST_INPUT = 'php://input';
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function __construct($http_method, $http_url, $parameters = null)
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{
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@$parameters or $parameters = [];
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$this->parameters = $parameters;
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$this->http_method = $http_method;
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$this->http_url = $http_url;
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}
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/**
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* attempt to build up a request from what was passed to the server
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*/
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public static function from_request($http_method = null, $http_url = null, $parameters = null)
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{
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$scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on")
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? 'http'
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: 'https';
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$port = "";
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if (
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$_SERVER['SERVER_PORT'] != "80" && $_SERVER['SERVER_PORT'] != "443" &&
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strpos(':', $_SERVER['HTTP_HOST']) < 0
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) {
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$port = ':' . $_SERVER['SERVER_PORT'] ;
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}
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@$http_url or $http_url = $scheme .
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'://' . $_SERVER['HTTP_HOST'] .
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$port .
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$_SERVER['REQUEST_URI'];
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@$http_method or $http_method = $_SERVER['REQUEST_METHOD'];
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// We weren't handed any parameters, so let's find the ones relevant to
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// this request.
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// If you run XML-RPC or similar you should use this to provide your own
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// parsed parameter-list
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if (!$parameters) {
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// Find request headers
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$request_headers = OAuthUtil::get_headers();
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// Parse the query-string to find GET parameters
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$parameters = OAuthUtil::parse_parameters($_SERVER['QUERY_STRING']);
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$ourpost = $_POST;
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// Deal with magic_quotes
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// http://www.php.net/manual/en/security.magicquotes.disabling.php
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if (get_magic_quotes_gpc()) {
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$outpost = [];
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foreach ($_POST as $k => $v) {
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$v = stripslashes($v);
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$ourpost[$k] = $v;
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}
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}
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// Add POST Parameters if they exist
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$parameters = array_merge($parameters, $ourpost);
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// We have a Authorization-header with OAuth data. Parse the header
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// and add those overriding any duplicates from GET or POST
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if (@substr($request_headers['Authorization'], 0, 6) == "OAuth ") {
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$header_parameters = OAuthUtil::split_header(
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$request_headers['Authorization']
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);
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$parameters = array_merge($parameters, $header_parameters);
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}
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}
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return new OAuthRequest($http_method, $http_url, $parameters);
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}
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/**
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* pretty much a helper function to set up the request
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*/
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public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters = null)
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{
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@$parameters or $parameters = [];
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$defaults = ["oauth_version" => OAuthRequest::$version,
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"oauth_nonce" => OAuthRequest::generate_nonce(),
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"oauth_timestamp" => OAuthRequest::generate_timestamp(),
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"oauth_consumer_key" => $consumer->key];
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if ($token) {
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$defaults['oauth_token'] = $token->key;
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}
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$parameters = array_merge($defaults, $parameters);
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// Parse the query-string to find and add GET parameters
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$parts = parse_url($http_url);
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if (isset($parts['query'])) {
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$qparms = OAuthUtil::parse_parameters($parts['query']);
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$parameters = array_merge($qparms, $parameters);
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}
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return new OAuthRequest($http_method, $http_url, $parameters);
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}
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public function set_parameter($name, $value, $allow_duplicates = true)
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{
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if ($allow_duplicates && isset($this->parameters[$name])) {
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// We have already added parameter(s) with this name, so add to the list
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if (is_scalar($this->parameters[$name])) {
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// This is the first duplicate, so transform scalar (string)
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// into an array so we can add the duplicates
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$this->parameters[$name] = [$this->parameters[$name]];
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}
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$this->parameters[$name][] = $value;
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} else {
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$this->parameters[$name] = $value;
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}
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}
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public function get_parameter($name)
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{
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return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
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}
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public function get_parameters()
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{
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return $this->parameters;
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}
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public function unset_parameter($name)
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{
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unset($this->parameters[$name]);
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}
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/**
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* The request parameters, sorted and concatenated into a normalized string.
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* @return string
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*/
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public function get_signable_parameters()
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{
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// Grab all parameters
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$params = $this->parameters;
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// Remove oauth_signature if present
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// Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
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if (isset($params['oauth_signature'])) {
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unset($params['oauth_signature']);
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}
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return OAuthUtil::build_http_query($params);
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}
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/**
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* Returns the base string of this request
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*
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* The base string defined as the method, the url
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* and the parameters (normalized), each urlencoded
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* and the concated with &.
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*/
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public function get_signature_base_string()
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{
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$parts = [
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$this->get_normalized_http_method(),
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$this->get_normalized_http_url(),
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$this->get_signable_parameters()
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];
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$parts = OAuthUtil::urlencode_rfc3986($parts);
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return implode('&', $parts);
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}
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/**
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* just uppercases the http method
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*/
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public function get_normalized_http_method()
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{
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return strtoupper($this->http_method);
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}
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/**
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* parses the url and rebuilds it to be
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* scheme://host/path
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*/
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public function get_normalized_http_url()
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{
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$parts = parse_url($this->http_url);
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$port = @$parts['port'];
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$scheme = $parts['scheme'];
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$host = $parts['host'];
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$path = @$parts['path'];
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$port or $port = ($scheme == 'https') ? '443' : '80';
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if (
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($scheme == 'https' && $port != '443')
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|| ($scheme == 'http' && $port != '80')
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) {
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$host = "$host:$port";
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}
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return "$scheme://$host$path";
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||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* builds a url usable for a GET request
|
||
|
|
*/
|
||
|
|
public function to_url()
|
||
|
|
{
|
||
|
|
$post_data = $this->to_postdata();
|
||
|
|
$out = $this->get_normalized_http_url();
|
||
|
|
if ($post_data) {
|
||
|
|
$out .= '?' . $post_data;
|
||
|
|
}
|
||
|
|
return $out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* builds the data one would send in a POST request
|
||
|
|
*/
|
||
|
|
public function to_postdata()
|
||
|
|
{
|
||
|
|
return OAuthUtil::build_http_query($this->parameters);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* builds the Authorization: header
|
||
|
|
*/
|
||
|
|
public function to_header()
|
||
|
|
{
|
||
|
|
$out = 'Authorization: OAuth realm=""';
|
||
|
|
$total = [];
|
||
|
|
foreach ($this->parameters as $k => $v) {
|
||
|
|
if (substr($k, 0, 5) != "oauth") {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (is_array($v)) {
|
||
|
|
throw new OAuthException('Arrays not supported in headers');
|
||
|
|
}
|
||
|
|
$out .= ',' .
|
||
|
|
OAuthUtil::urlencode_rfc3986($k) .
|
||
|
|
'="' .
|
||
|
|
OAuthUtil::urlencode_rfc3986($v) .
|
||
|
|
'"';
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* util function: current timestamp
|
||
|
|
*/
|
||
|
|
private static function generate_timestamp()
|
||
|
|
{
|
||
|
|
return time();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* util function: current nonce
|
||
|
|
*/
|
||
|
|
private static function generate_nonce()
|
||
|
|
{
|
||
|
|
$mt = microtime();
|
||
|
|
$rand = mt_rand();
|
||
|
|
|
||
|
|
return md5($mt . $rand); // md5s look nicer than numbers
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class OAuthServer
|
||
|
|
{
|
||
|
|
protected $timestamp_threshold = 300; // in seconds, five minutes
|
||
|
|
protected $version = 1.0; // hi blaine
|
||
|
|
protected $signature_methods = [];
|
||
|
|
|
||
|
|
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()] =
|
||
|
|
$signature_method;
|
||
|
|
}
|
||
|
|
|
||
|
|
// high level functions
|
||
|
|
|
||
|
|
/**
|
||
|
|
* process a request_token request
|
||
|
|
* returns the request token on success
|
||
|
|
*/
|
||
|
|
public function fetch_request_token(&$request)
|
||
|
|
{
|
||
|
|
$this->get_version($request);
|
||
|
|
|
||
|
|
$consumer = $this->get_consumer($request);
|
||
|
|
|
||
|
|
// no token required for the initial token request
|
||
|
|
$token = null;
|
||
|
|
|
||
|
|
$this->check_signature($request, $consumer, $token);
|
||
|
|
|
||
|
|
$new_token = $this->data_store->new_request_token($consumer);
|
||
|
|
|
||
|
|
return $new_token;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* process an access_token request
|
||
|
|
* returns the access token on success
|
||
|
|
*/
|
||
|
|
public function fetch_access_token(&$request)
|
||
|
|
{
|
||
|
|
$this->get_version($request);
|
||
|
|
|
||
|
|
$consumer = $this->get_consumer($request);
|
||
|
|
|
||
|
|
// requires authorized request token
|
||
|
|
$token = $this->get_token($request, $consumer, "request");
|
||
|
|
|
||
|
|
|
||
|
|
$this->check_signature($request, $consumer, $token);
|
||
|
|
|
||
|
|
$new_token = $this->data_store->new_access_token($token, $consumer);
|
||
|
|
|
||
|
|
return $new_token;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* verify an api call, checks all the parameters
|
||
|
|
*/
|
||
|
|
public function verify_request(&$request)
|
||
|
|
{
|
||
|
|
global $OAuth_last_computed_signature;
|
||
|
|
$OAuth_last_computed_signature = false;
|
||
|
|
$this->get_version($request);
|
||
|
|
$consumer = $this->get_consumer($request);
|
||
|
|
$token = $this->get_token($request, $consumer, "access");
|
||
|
|
$this->check_signature($request, $consumer, $token);
|
||
|
|
return [$consumer, $token];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Internals from here
|
||
|
|
/**
|
||
|
|
* version 1
|
||
|
|
*/
|
||
|
|
private function get_version(&$request)
|
||
|
|
{
|
||
|
|
$version = $request->get_parameter("oauth_version");
|
||
|
|
if (!$version) {
|
||
|
|
$version = 1.0;
|
||
|
|
}
|
||
|
|
if ($version && $version != $this->version) {
|
||
|
|
throw new OAuthException("OAuth version '$version' not supported");
|
||
|
|
}
|
||
|
|
return $version;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* figure out the signature with some defaults
|
||
|
|
*/
|
||
|
|
private function get_signature_method(&$request)
|
||
|
|
{
|
||
|
|
$signature_method =
|
||
|
|
@$request->get_parameter("oauth_signature_method");
|
||
|
|
if (!$signature_method) {
|
||
|
|
$signature_method = "PLAINTEXT";
|
||
|
|
}
|
||
|
|
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];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* try to find the consumer for the provided request's consumer key
|
||
|
|
*/
|
||
|
|
private function get_consumer(&$request)
|
||
|
|
{
|
||
|
|
$consumer_key = @$request->get_parameter("oauth_consumer_key");
|
||
|
|
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 $consumer;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* try to find the token for the provided request's token key
|
||
|
|
*/
|
||
|
|
private function get_token(&$request, $consumer, $token_type = "access")
|
||
|
|
{
|
||
|
|
$token_field = @$request->get_parameter('oauth_token');
|
||
|
|
if (!$token_field) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
$token = $this->data_store->lookup_token(
|
||
|
|
$consumer,
|
||
|
|
$token_type,
|
||
|
|
$token_field
|
||
|
|
);
|
||
|
|
if (!$token) {
|
||
|
|
throw new OAuthException("Invalid $token_type token: $token_field");
|
||
|
|
}
|
||
|
|
return $token;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* all-in-one function to check the signature on a request
|
||
|
|
* should guess the signature method appropriately
|
||
|
|
*/
|
||
|
|
private function check_signature(&$request, $consumer, $token)
|
||
|
|
{
|
||
|
|
// this should probably be in a different method
|
||
|
|
global $OAuth_last_computed_signature;
|
||
|
|
$OAuth_last_computed_signature = false;
|
||
|
|
|
||
|
|
$timestamp = @$request->get_parameter('oauth_timestamp');
|
||
|
|
$nonce = @$request->get_parameter('oauth_nonce');
|
||
|
|
|
||
|
|
$this->check_timestamp($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) {
|
||
|
|
$ex_text = "Invalid signature";
|
||
|
|
if ($OAuth_last_computed_signature) {
|
||
|
|
$ex_text = $ex_text . " ours= $OAuth_last_computed_signature yours=$signature";
|
||
|
|
}
|
||
|
|
throw new OAuthException($ex_text);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* check that the timestamp is new enough
|
||
|
|
*/
|
||
|
|
private function check_timestamp($timestamp)
|
||
|
|
{
|
||
|
|
// verify that timestamp is recentish
|
||
|
|
$now = time();
|
||
|
|
if ($now - $timestamp > $this->timestamp_threshold) {
|
||
|
|
throw new OAuthException(
|
||
|
|
"Expired timestamp, yours $timestamp, ours $now"
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* check that the nonce is not repeated
|
||
|
|
*/
|
||
|
|
private function check_nonce($consumer, $token, $nonce, $timestamp)
|
||
|
|
{
|
||
|
|
// verify that the nonce is uniqueish
|
||
|
|
$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)
|
||
|
|
{
|
||
|
|
// implement me
|
||
|
|
}
|
||
|
|
|
||
|
|
function lookup_token($consumer, $token_type, $token)
|
||
|
|
{
|
||
|
|
// implement me
|
||
|
|
}
|
||
|
|
|
||
|
|
function lookup_nonce($consumer, $token, $nonce, $timestamp)
|
||
|
|
{
|
||
|
|
// implement me
|
||
|
|
}
|
||
|
|
|
||
|
|
function new_request_token($consumer)
|
||
|
|
{
|
||
|
|
// return a new token attached to this consumer
|
||
|
|
}
|
||
|
|
|
||
|
|
function new_access_token($token, $consumer)
|
||
|
|
{
|
||
|
|
// return a new access token attached to this consumer
|
||
|
|
// for the user associated with this token if the request token
|
||
|
|
// is authorized
|
||
|
|
// should also invalidate the request token
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class OAuthUtil
|
||
|
|
{
|
||
|
|
public static function urlencode_rfc3986($input)
|
||
|
|
{
|
||
|
|
if (is_array($input)) {
|
||
|
|
return array_map(['OAuthUtil', 'urlencode_rfc3986'], $input);
|
||
|
|
} elseif (is_scalar($input)) {
|
||
|
|
return str_replace(
|
||
|
|
'+',
|
||
|
|
' ',
|
||
|
|
str_replace('%7E', '~', rawurlencode($input))
|
||
|
|
);
|
||
|
|
} else {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// This decode function isn't taking into consideration the above
|
||
|
|
// modifications to the encoding process. However, this method doesn't
|
||
|
|
// seem to be used anywhere so leaving it as is.
|
||
|
|
public static function urldecode_rfc3986($string)
|
||
|
|
{
|
||
|
|
return urldecode($string);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Utility function for turning the Authorization: header into
|
||
|
|
// parameters, has to do some unescaping
|
||
|
|
// Can filter out any non-oauth parameters if needed (default behaviour)
|
||
|
|
public static function split_header($header, $only_allow_oauth_parameters = true)
|
||
|
|
{
|
||
|
|
$pattern = '/(([-_a-z]*)=("([^"]*)"|([^,]*)),?)/';
|
||
|
|
$offset = 0;
|
||
|
|
$params = [];
|
||
|
|
while (preg_match($pattern, $header, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) {
|
||
|
|
$match = $matches[0];
|
||
|
|
$header_name = $matches[2][0];
|
||
|
|
$header_content = (isset($matches[5])) ? $matches[5][0] : $matches[4][0];
|
||
|
|
if (preg_match('/^oauth_/', $header_name) || !$only_allow_oauth_parameters) {
|
||
|
|
$params[$header_name] = OAuthUtil::urldecode_rfc3986($header_content);
|
||
|
|
}
|
||
|
|
$offset = $match[1] + strlen($match[0]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($params['realm'])) {
|
||
|
|
unset($params['realm']);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $params;
|
||
|
|
}
|
||
|
|
|
||
|
|
// helper to try to sort out headers for people who aren't running apache
|
||
|
|
public static function get_headers()
|
||
|
|
{
|
||
|
|
if (function_exists('apache_request_headers')) {
|
||
|
|
// we need this to get the actual Authorization: header
|
||
|
|
// because apache tends to tell us it doesn't exist
|
||
|
|
return apache_request_headers();
|
||
|
|
}
|
||
|
|
// otherwise we don't have apache and are just going to have to hope
|
||
|
|
// that $_SERVER actually contains what we need
|
||
|
|
$out = [];
|
||
|
|
foreach ($_SERVER as $key => $value) {
|
||
|
|
if (substr($key, 0, 5) == "HTTP_") {
|
||
|
|
// this is chaos, basically it is just there to capitalize the first
|
||
|
|
// letter of every word that is not an initial HTTP and strip HTTP
|
||
|
|
// code from przemek
|
||
|
|
$key = str_replace(
|
||
|
|
" ",
|
||
|
|
"-",
|
||
|
|
ucwords(strtolower(str_replace("_", " ", substr($key, 5))))
|
||
|
|
);
|
||
|
|
$out[$key] = $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $out;
|
||
|
|
}
|
||
|
|
|
||
|
|
// This function takes a input like a=b&a=c&d=e and returns the parsed
|
||
|
|
// parameters like this
|
||
|
|
// array('a' => array('b','c'), 'd' => 'e')
|
||
|
|
public static function parse_parameters($input)
|
||
|
|
{
|
||
|
|
if (!isset($input) || !$input) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
$pairs = split('&', $input);
|
||
|
|
|
||
|
|
$parsed_parameters = [];
|
||
|
|
foreach ($pairs as $pair) {
|
||
|
|
$split = split('=', $pair, 2);
|
||
|
|
$parameter = OAuthUtil::urldecode_rfc3986($split[0]);
|
||
|
|
$value = isset($split[1]) ? OAuthUtil::urldecode_rfc3986($split[1]) : '';
|
||
|
|
|
||
|
|
if (isset($parsed_parameters[$parameter])) {
|
||
|
|
// We have already recieved parameter(s) with this name, so add to the list
|
||
|
|
// of parameters with this name
|
||
|
|
|
||
|
|
if (is_scalar($parsed_parameters[$parameter])) {
|
||
|
|
// This is the first duplicate, so transform scalar (string) into an array
|
||
|
|
// so we can add the duplicates
|
||
|
|
$parsed_parameters[$parameter] = [$parsed_parameters[$parameter]];
|
||
|
|
}
|
||
|
|
|
||
|
|
$parsed_parameters[$parameter][] = $value;
|
||
|
|
} else {
|
||
|
|
$parsed_parameters[$parameter] = $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $parsed_parameters;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function build_http_query($params)
|
||
|
|
{
|
||
|
|
if (!$params) {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
// Urlencode both keys and values
|
||
|
|
$keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
|
||
|
|
$values = OAuthUtil::urlencode_rfc3986(array_values($params));
|
||
|
|
$params = array_combine($keys, $values);
|
||
|
|
|
||
|
|
// Parameters are sorted by name, using lexicographical byte value ordering.
|
||
|
|
// Ref: Spec: 9.1.1 (1)
|
||
|
|
uksort($params, 'strcmp');
|
||
|
|
|
||
|
|
$pairs = [];
|
||
|
|
foreach ($params as $parameter => $value) {
|
||
|
|
if (is_array($value)) {
|
||
|
|
// If two or more parameters share the same name, they are sorted by their value
|
||
|
|
// Ref: Spec: 9.1.1 (1)
|
||
|
|
natsort($value);
|
||
|
|
foreach ($value as $duplicate_value) {
|
||
|
|
$pairs[] = $parameter . '=' . $duplicate_value;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$pairs[] = $parameter . '=' . $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// For each parameter, the name is separated from the corresponding value by an '=' character (ASCII code 61)
|
||
|
|
// Each name-value pair is separated by an '&' character (ASCII code 38)
|
||
|
|
return implode('&', $pairs);
|
||
|
|
}
|
||
|
|
}
|