/* Generic exception class
*/
-class OAuthException extends Exception {/*{{{*/
- // pass
-}/*}}}*/
+if (!class_exists('OAuthException')) {
+ class OAuthException extends Exception {
+ // pass
+ }
+}
-class OAuthConsumer {/*{{{*/
+class OAuthConsumer {
public $key;
public $secret;
- function __construct($key, $secret, $callback_url=NULL) {/*{{{*/
+ function __construct($key, $secret, $callback_url=NULL) {
$this->key = $key;
$this->secret = $secret;
$this->callback_url = $callback_url;
- }/*}}}*/
+ }
- function __toString() {/*{{{*/
+ function __toString() {
return "OAuthConsumer[key=$this->key,secret=$this->secret]";
- }/*}}}*/
-}/*}}}*/
+ }
+}
-class OAuthToken {/*{{{*/
+class OAuthToken {
// access tokens and request tokens
public $key;
public $secret;
* key = the token
* secret = the token secret
*/
- function __construct($key, $secret) {/*{{{*/
+ function __construct($key, $secret) {
$this->key = $key;
$this->secret = $secret;
- }/*}}}*/
+ }
/**
* generates the basic string serialization of a token that a server
* would respond to request_token and access_token calls with
*/
- function to_string() {/*{{{*/
- return "oauth_token=" . OAuthUtil::urlencode_rfc3986($this->key) .
- "&oauth_token_secret=" . OAuthUtil::urlencode_rfc3986($this->secret);
- }/*}}}*/
+ function to_string() {
+ return "oauth_token=" .
+ OAuthUtil::urlencode_rfc3986($this->key) .
+ "&oauth_token_secret=" .
+ OAuthUtil::urlencode_rfc3986($this->secret);
+ }
- function __toString() {/*{{{*/
+ function __toString() {
return $this->to_string();
- }/*}}}*/
-}/*}}}*/
+ }
+}
+
+/**
+ * A class for implementing a Signature Method
+ * See section 9 ("Signing Requests") in the spec
+ */
+abstract class OAuthSignatureMethod {
+ /**
+ * Needs to return the name of the Signature Method (ie HMAC-SHA1)
+ * @return string
+ */
+ abstract public function get_name();
-class OAuthSignatureMethod {/*{{{*/
- public function check_signature(&$request, $consumer, $token, $signature) {
+ /**
+ * Build up the signature
+ * NOTE: The output of this function MUST NOT be urlencoded.
+ * the encoding is handled in OAuthRequest when the final
+ * request is serialized
+ * @param OAuthRequest $request
+ * @param OAuthConsumer $consumer
+ * @param OAuthToken $token
+ * @return string
+ */
+ abstract public function build_signature($request, $consumer, $token);
+
+ /**
+ * Verifies that a given signature is correct
+ * @param OAuthRequest $request
+ * @param OAuthConsumer $consumer
+ * @param OAuthToken $token
+ * @param string $signature
+ * @return bool
+ */
+ public function check_signature($request, $consumer, $token, $signature) {
$built = $this->build_signature($request, $consumer, $token);
- return $built == $signature;
- }
-}/*}}}*/
-class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod {/*{{{*/
- function get_name() {/*{{{*/
+ // Check for zero length, although unlikely here
+ if (strlen($built) == 0 || strlen($signature) == 0) {
+ return false;
+ }
+
+ if (strlen($built) != strlen($signature)) {
+ return false;
+ }
+
+ // Avoid a timing leak with a (hopefully) time insensitive compare
+ $result = 0;
+ for ($i = 0; $i < strlen($signature); $i++) {
+ $result |= ord($built{$i}) ^ ord($signature{$i});
+ }
+
+ return $result == 0;
+ }
+}
+
+/**
+ * The HMAC-SHA1 signature method uses the HMAC-SHA1 signature algorithm as defined in [RFC2104]
+ * where the Signature Base String is the text and the key is the concatenated values (each first
+ * encoded per Parameter Encoding) of the Consumer Secret and Token Secret, separated by an '&'
+ * character (ASCII code 38) even if empty.
+ * - Chapter 9.2 ("HMAC-SHA1")
+ */
+class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod {
+ function get_name() {
return "HMAC-SHA1";
- }/*}}}*/
+ }
- public function build_signature($request, $consumer, $token) {/*{{{*/
+ public function build_signature($request, $consumer, $token) {
$base_string = $request->get_signature_base_string();
$request->base_string = $base_string;
$key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
$key = implode('&', $key_parts);
- return base64_encode( hash_hmac('sha1', $base_string, $key, true));
- }/*}}}*/
-}/*}}}*/
+ return base64_encode(hash_hmac('sha1', $base_string, $key, true));
+ }
+}
-class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod {/*{{{*/
- public function get_name() {/*{{{*/
+/**
+ * The PLAINTEXT method does not provide any security protection and SHOULD only be used
+ * over a secure channel such as HTTPS. It does not use the Signature Base String.
+ * - Chapter 9.4 ("PLAINTEXT")
+ */
+class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod {
+ public function get_name() {
return "PLAINTEXT";
- }/*}}}*/
+ }
- public function build_signature($request, $consumer, $token) {/*{{{*/
- $sig = array(
- OAuthUtil::urlencode_rfc3986($consumer->secret)
+ /**
+ * oauth_signature is set to the concatenated encoded values of the Consumer Secret and
+ * Token Secret, separated by a '&' character (ASCII code 38), even if either secret is
+ * empty. The result MUST be encoded again.
+ * - Chapter 9.4.1 ("Generating Signatures")
+ *
+ * Please note that the second encoding MUST NOT happen in the SignatureMethod, as
+ * OAuthRequest handles this!
+ */
+ public function build_signature($request, $consumer, $token) {
+ $key_parts = array(
+ $consumer->secret,
+ ($token) ? $token->secret : ""
);
- if ($token) {
- array_push($sig, OAuthUtil::urlencode_rfc3986($token->secret));
- } else {
- array_push($sig, '');
- }
-
- $raw = implode("&", $sig);
- // for debug purposes
- $request->base_string = $raw;
-
- return OAuthUtil::urlencode_rfc3986($raw);
- }/*}}}*/
-}/*}}}*/
+ $key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
+ $key = implode('&', $key_parts);
+ $request->base_string = $key;
-class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod {/*{{{*/
- public function get_name() {/*{{{*/
+ return $key;
+ }
+}
+
+/**
+ * The RSA-SHA1 signature method uses the RSASSA-PKCS1-v1_5 signature algorithm as defined in
+ * [RFC3447] section 8.2 (more simply known as PKCS#1), using SHA-1 as the hash function for
+ * EMSA-PKCS1-v1_5. It is assumed that the Consumer has provided its RSA public key in a
+ * verified way to the Service Provider, in a manner which is beyond the scope of this
+ * specification.
+ * - Chapter 9.3 ("RSA-SHA1")
+ */
+abstract class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod {
+ public function get_name() {
return "RSA-SHA1";
- }/*}}}*/
-
- protected function fetch_public_cert(&$request) {/*{{{*/
- // not implemented yet, ideas are:
- // (1) do a lookup in a table of trusted certs keyed off of consumer
- // (2) fetch via http using a url provided by the requester
- // (3) some sort of specific discovery code based on request
- //
- // either way should return a string representation of the certificate
- throw Exception("fetch_public_cert not implemented");
- }/*}}}*/
-
- protected function fetch_private_cert(&$request) {/*{{{*/
- // not implemented yet, ideas are:
- // (1) do a lookup in a table of trusted certs keyed off of consumer
- //
- // either way should return a string representation of the certificate
- throw Exception("fetch_private_cert not implemented");
- }/*}}}*/
-
- public function build_signature(&$request, $consumer, $token) {/*{{{*/
+ }
+
+ // Up to the SP to implement this lookup of keys. Possible ideas are:
+ // (1) do a lookup in a table of trusted certs keyed off of consumer
+ // (2) fetch via http using a url provided by the requester
+ // (3) some sort of specific discovery code based on request
+ //
+ // Either way should return a string representation of the certificate
+ protected abstract function fetch_public_cert(&$request);
+
+ // Up to the SP to implement this lookup of keys. Possible ideas are:
+ // (1) do a lookup in a table of trusted certs keyed off of consumer
+ //
+ // Either way should return a string representation of the certificate
+ 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;
-
+
// Fetch the private key cert based on the request
$cert = $this->fetch_private_cert($request);
$privatekeyid = openssl_get_privatekey($cert);
// Sign using the key
- $ok = openssl_sign($base_string, $signature, $privatekeyid);
+ $ok = openssl_sign($base_string, $signature, $privatekeyid);
// Release the key resource
openssl_free_key($privatekeyid);
-
+
return base64_encode($signature);
- } /*}}}*/
+ }
- public function check_signature(&$request, $consumer, $token, $signature) {/*{{{*/
+ public function check_signature($request, $consumer, $token, $signature) {
$decoded_sig = base64_decode($signature);
$base_string = $request->get_signature_base_string();
-
+
// Fetch the public key cert based on the request
$cert = $this->fetch_public_cert($request);
$publickeyid = openssl_get_publickey($cert);
// Check the computed signature against the one passed in the query
- $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
+ $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
// Release the key resource
openssl_free_key($publickeyid);
-
+
return $ok == 1;
- } /*}}}*/
-}/*}}}*/
+ }
+}
-class OAuthRequest {/*{{{*/
- private $parameters;
- private $http_method;
- private $http_url;
+class OAuthRequest {
+ protected $parameters;
+ protected $http_method;
+ protected $http_url;
// for debug purposes
public $base_string;
public static $version = '1.0';
+ public static $POST_INPUT = 'php://input';
- function __construct($http_method, $http_url, $parameters=NULL) {/*{{{*/
- @$parameters or $parameters = array();
+ function __construct($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 = $http_url;
- }/*}}}*/
+ }
/**
* attempt to build up a request from what was passed to the server
*/
- public static function from_request($http_method=NULL, $http_url=NULL, $parameters=NULL) {/*{{{*/
- $scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on") ? 'http' : 'https';
- @$http_url or $http_url = $scheme . '://' . $_SERVER['HTTP_HOST'] . ':' . $_SERVER['SERVER_PORT'] . $_SERVER['REQUEST_URI'];
- @$http_method or $http_method = $_SERVER['REQUEST_METHOD'];
-
- $request_headers = OAuthRequest::get_headers();
+ public static function from_request($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 : $_SERVER['REQUEST_METHOD'];
+
+ // We weren't handed any parameters, so let's find the ones relevant to
+ // this request.
+ // If you run XML-RPC or similar you should use this to provide your own
+ // parsed parameter-list
+ if (!$parameters) {
+ // Find request headers
+ $request_headers = OAuthUtil::get_headers();
+
+ // Parse the query-string to find GET parameters
+ $parameters = OAuthUtil::parse_parameters($_SERVER['QUERY_STRING']);
+
+ // It's a POST request of the proper content-type, so parse POST
+ // parameters and add those overriding any duplicates from GET
+ 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, $post_data);
+ }
- // let the library user override things however they'd like, if they know
- // which parameters to use then go for it, for example XMLRPC might want to
- // do this
- if ($parameters) {
- $req = new OAuthRequest($http_method, $http_url, $parameters);
- } else {
- // collect request parameters from query string (GET) and post-data (POST) if appropriate (note: POST vars have priority)
- $req_parameters = $_GET;
- if ($http_method == "POST" &&
- ( @strstr($request_headers["Content-Type"], "application/x-www-form-urlencoded") || @strstr($_ENV["CONTENT_TYPE"], "application/x-www-form-urlencoded") )) {
- $req_parameters = array_merge($req_parameters, $_POST);
+ // We have a Authorization-header with OAuth data. Parse the header
+ // and add those overriding any duplicates from GET or POST
+ if (isset($request_headers['Authorization']) && substr($request_headers['Authorization'], 0, 6) == 'OAuth ') {
+ $header_parameters = OAuthUtil::split_header(
+ $request_headers['Authorization']
+ );
+ $parameters = array_merge($parameters, $header_parameters);
}
- // next check for the auth header, we need to do some extra stuff
- // if that is the case, namely suck in the parameters from GET or POST
- // so that we can include them in the signature
- if (@substr($request_headers['Authorization'], 0, 6) == "OAuth ") {
- $header_parameters = OAuthRequest::split_header($request_headers['Authorization']);
- $parameters = array_merge($req_parameters, $header_parameters);
- $req = new OAuthRequest($http_method, $http_url, $parameters);
- } else $req = new OAuthRequest($http_method, $http_url, $req_parameters);
}
- return $req;
- }/*}}}*/
+ return new OAuthRequest($http_method, $http_url, $parameters);
+ }
/**
* pretty much a helper function to set up the request
*/
- public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters=NULL) {/*{{{*/
- @$parameters or $parameters = array();
+ public static function from_consumer_and_token($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, $parameters);
- if ($token) {
- $parameters['oauth_token'] = $token->key;
- }
return new OAuthRequest($http_method, $http_url, $parameters);
- }/*}}}*/
+ }
- public function set_parameter($name, $value) {/*{{{*/
- $this->parameters[$name] = $value;
- }/*}}}*/
+ public function set_parameter($name, $value, $allow_duplicates = true) {
+ if ($allow_duplicates && isset($this->parameters[$name])) {
+ // We have already added parameter(s) with this name, so add to the list
+ if (is_scalar($this->parameters[$name])) {
+ // This is the first duplicate, so transform scalar (string)
+ // into an array so we can add the duplicates
+ $this->parameters[$name] = array($this->parameters[$name]);
+ }
- public function get_parameter($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() {/*{{{*/
+ public function get_parameters() {
return $this->parameters;
- }/*}}}*/
+ }
+
+ public function unset_parameter($name) {
+ unset($this->parameters[$name]);
+ }
/**
- * Returns the normalized parameters of the request
- *
- * This will be all (except oauth_signature) parameters,
- * sorted first by key, and if duplicate keys, then by
- * value.
- *
- * The returned string will be all the key=value pairs
- * concated by &.
- *
+ * The request parameters, sorted and concatenated into a normalized string.
* @return string
*/
- public function get_signable_parameters() {/*{{{*/
+ public function get_signable_parameters() {
// Grab all parameters
$params = $this->parameters;
-
+
// Remove oauth_signature if present
+ // Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
if (isset($params['oauth_signature'])) {
unset($params['oauth_signature']);
}
-
- // Urlencode both keys and values
- $keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
- $values = OAuthUtil::urlencode_rfc3986(array_values($params));
- $params = array_combine($keys, $values);
-
- // Sort by keys (natsort)
- uksort($params, 'strcmp');
- // Generate key=value pairs
- $pairs = array();
- foreach ($params as $key=>$value ) {
- if (is_array($value)) {
- // If the value is an array, it's because there are multiple
- // with the same key, sort them, then add all the pairs
- natsort($value);
- foreach ($value as $v2) {
- $pairs[] = $key . '=' . $v2;
- }
- } else {
- $pairs[] = $key . '=' . $value;
- }
- }
-
- // Return the pairs, concated with &
- return implode('&', $pairs);
- }/*}}}*/
+ return OAuthUtil::build_http_query($params);
+ }
/**
* Returns the base string of this request
* and the parameters (normalized), each urlencoded
* and the concated with &.
*/
- public function get_signature_base_string() {/*{{{*/
+ public function get_signature_base_string() {
$parts = array(
$this->get_normalized_http_method(),
$this->get_normalized_http_url(),
$parts = OAuthUtil::urlencode_rfc3986($parts);
return implode('&', $parts);
- }/*}}}*/
+ }
/**
* just uppercases the http method
*/
- public function get_normalized_http_method() {/*{{{*/
+ public function get_normalized_http_method() {
return strtoupper($this->http_method);
- }/*}}}*/
+ }
/**
* parses the url and rebuilds it to be
* scheme://host/path
*/
- public function get_normalized_http_url() {/*{{{*/
+ public function get_normalized_http_url() {
$parts = parse_url($this->http_url);
- $port = @$parts['port'];
- $scheme = $parts['scheme'];
- $host = $parts['host'];
- $path = @$parts['path'];
-
- $port or $port = ($scheme == 'https') ? '443' : '80';
+ $scheme = (isset($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";
- }/*}}}*/
+ }
/**
* builds a url usable for a GET request
*/
- public function to_url() {/*{{{*/
- $out = $this->get_normalized_http_url() . "?";
- $out .= $this->to_postdata();
+ 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
- *
- * TODO(morten.fangel):
- * this function might be easily replaced with http_build_query()
- * and corrections for rfc3986 compatibility.. but not sure
*/
- public function to_postdata() {/*{{{*/
- $total = array();
- foreach ($this->parameters as $k => $v) {
- if (is_array($v)) {
- foreach ($v as $va) {
- $total[] = OAuthUtil::urlencode_rfc3986($k) . "[]=" . OAuthUtil::urlencode_rfc3986($va);
- }
- } else {
- $total[] = OAuthUtil::urlencode_rfc3986($k) . "=" . OAuthUtil::urlencode_rfc3986($v);
- }
- }
- $out = implode("&", $total);
- return $out;
- }/*}}}*/
+ public function to_postdata() {
+ return OAuthUtil::build_http_query($this->parameters);
+ }
/**
* builds the Authorization: header
*/
- public function to_header() {/*{{{*/
- $out ='Authorization: OAuth realm=""';
+ public function to_header($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');
- $out .= ',' . OAuthUtil::urlencode_rfc3986($k) . '="' . OAuthUtil::urlencode_rfc3986($v) . '"';
+ if (is_array($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() {/*{{{*/
+ public function __toString() {
return $this->to_url();
- }/*}}}*/
+ }
- public function sign_request($signature_method, $consumer, $token) {/*{{{*/
- $this->set_parameter("oauth_signature_method", $signature_method->get_name());
+ public function sign_request($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);
- }/*}}}*/
+ $this->set_parameter("oauth_signature", $signature, false);
+ }
- public function build_signature($signature_method, $consumer, $token) {/*{{{*/
+ public function build_signature($signature_method, $consumer, $token) {
$signature = $signature_method->build_signature($this, $consumer, $token);
return $signature;
- }/*}}}*/
+ }
/**
* util function: current timestamp
*/
- private static function generate_timestamp() {/*{{{*/
+ private static function generate_timestamp() {
return time();
- }/*}}}*/
+ }
/**
* util function: current nonce
*/
- private static function generate_nonce() {/*{{{*/
+ private static function generate_nonce() {
$mt = microtime();
$rand = mt_rand();
return md5($mt . $rand); // md5s look nicer than numbers
- }/*}}}*/
-
- /**
- * util function for turning the Authorization: header into
- * parameters, has to do some unescaping
- */
- private static function split_header($header) {/*{{{*/
- $pattern = '/(([-_a-z]*)=("([^"]*)"|([^,]*)),?)/';
- $offset = 0;
- $params = array();
- while (preg_match($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];
- $params[$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
- */
- private 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
- $out = array();
- foreach ($_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;
- }/*}}}*/
-}/*}}}*/
+ }
+}
-class OAuthServer {/*{{{*/
+class OAuthServer {
protected $timestamp_threshold = 300; // in seconds, five minutes
- protected $version = 1.0; // hi blaine
+ protected $version = '1.0'; // hi blaine
protected $signature_methods = array();
protected $data_store;
- function __construct($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()] =
+ $signature_method;
+ }
- public function add_signature_method($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) {/*{{{*/
+ public function fetch_request_token(&$request) {
$this->get_version($request);
$consumer = $this->get_consumer($request);
$this->check_signature($request, $consumer, $token);
- $new_token = $this->data_store->new_request_token($consumer);
+ // Rev A change
+ $callback = $request->get_parameter('oauth_callback');
+ $new_token = $this->data_store->new_request_token($consumer, $callback);
return $new_token;
- }/*}}}*/
+ }
/**
* process an access_token request
* returns the access token on success
*/
- public function fetch_access_token(&$request) {/*{{{*/
+ 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);
+ // Rev A change
+ $verifier = $request->get_parameter('oauth_verifier');
+ $new_token = $this->data_store->new_access_token($token, $consumer, $verifier);
return $new_token;
- }/*}}}*/
+ }
/**
* verify an api call, checks all the parameters
*/
- public function verify_request(&$request) {/*{{{*/
+ 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, $token);
- }/*}}}*/
+ }
// Internals from here
/**
* version 1
*/
- private function get_version(&$request) {/*{{{*/
+ private function get_version(&$request) {
$version = $request->get_parameter("oauth_version");
if (!$version) {
- $version = 1.0;
+ // Service Providers MUST assume the protocol version to be 1.0 if this parameter is not present.
+ // Chapter 7.0 ("Accessing Protected Ressources")
+ $version = '1.0';
}
- if ($version && $version != $this->version) {
+ if ($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");
+ private function get_signature_method($request) {
+ $signature_method = $request instanceof OAuthRequest
+ ? $request->get_parameter("oauth_signature_method")
+ : NULL;
+
if (!$signature_method) {
- $signature_method = "PLAINTEXT";
+ // According to chapter 7 ("Accessing Protected Ressources") the signature-method
+ // parameter is required, and we can't just fallback to PLAINTEXT
+ throw new OAuthException('No signature method parameter. This parameter is required');
}
- if (!in_array($signature_method,
+
+ 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))
- );
+ "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");
+ 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");
}
}
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');
+ 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
);
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, $token) {/*{{{*/
+ private function check_signature($request, $consumer, $token) {
// this should probably be in a different method
- $timestamp = @$request->get_parameter('oauth_timestamp');
- $nonce = @$request->get_parameter('oauth_nonce');
+ $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');
+ $signature = $request->get_parameter('oauth_signature');
$valid_sig = $signature_method->check_signature(
- $request,
- $consumer,
- $token,
+ $request,
+ $consumer,
+ $token,
$signature
);
if (!$valid_sig) {
throw new OAuthException("Invalid signature");
}
- }/*}}}*/
+ }
/**
* check that the timestamp is new enough
*/
- private function check_timestamp($timestamp) {/*{{{*/
+ private function check_timestamp($timestamp) {
+ if( ! $timestamp )
+ throw new OAuthException(
+ 'Missing timestamp parameter. The parameter is required'
+ );
+
// verify that timestamp is recentish
$now = time();
- if ($now - $timestamp > $this->timestamp_threshold) {
- throw new OAuthException("Expired timestamp, yours $timestamp, ours $now");
+ if (abs($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, $timestamp) {/*{{{*/
+ private function check_nonce($consumer, $token, $nonce, $timestamp) {
+ if( ! $nonce )
+ throw new OAuthException(
+ 'Missing nonce parameter. The parameter is required'
+ );
+
// verify that the nonce is uniqueish
- $found = $this->data_store->lookup_nonce($consumer, $token, $nonce, $timestamp);
+ $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) {/*{{{*/
+class OAuthDataStore {
+ function lookup_consumer($consumer_key) {
// implement me
- }/*}}}*/
+ }
- function lookup_token($consumer, $token_type, $token) {/*{{{*/
+ function lookup_token($consumer, $token_type, $token) {
// implement me
- }/*}}}*/
+ }
- function lookup_nonce($consumer, $token, $nonce, $timestamp) {/*{{{*/
+ function lookup_nonce($consumer, $token, $nonce, $timestamp) {
// implement me
- }/*}}}*/
+ }
- function new_request_token($consumer) {/*{{{*/
+ function new_request_token($consumer, $callback = null) {
// return a new token attached to this consumer
- }/*}}}*/
+ }
- function new_access_token($token, $consumer) {/*{{{*/
+ function new_access_token($token, $consumer, $verifier = null) {
// 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
- }/*}}}*/
-
-}/*}}}*/
-
-
-/* A very naive dbm-based oauth storage
- */
-class SimpleOAuthDataStore extends OAuthDataStore {/*{{{*/
- private $dbh;
+ }
- function __construct($path = "oauth.gdbm") {/*{{{*/
- $this->dbh = dba_popen($path, 'c', 'gdbm');
- }/*}}}*/
+}
+
+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($input))
+ );
+ } else {
+ return '';
+ }
+}
- function __destruct() {/*{{{*/
- dba_close($this->dbh);
- }/*}}}*/
- function lookup_consumer($consumer_key) {/*{{{*/
- $rv = dba_fetch("consumer_$consumer_key", $this->dbh);
- if ($rv === FALSE) {
- return NULL;
- }
- $obj = unserialize($rv);
- if (!($obj instanceof OAuthConsumer)) {
- return NULL;
- }
- return $obj;
- }/*}}}*/
+ // This decode function isn't taking into consideration the above
+ // modifications to the encoding process. However, this method doesn't
+ // seem to be used anywhere so leaving it as is.
+ public static function urldecode_rfc3986($string) {
+ return urldecode($string);
+ }
- function lookup_token($consumer, $token_type, $token) {/*{{{*/
- $rv = dba_fetch("${token_type}_${token}", $this->dbh);
- if ($rv === FALSE) {
- return NULL;
- }
- $obj = unserialize($rv);
- if (!($obj instanceof OAuthToken)) {
- return NULL;
+ // Utility function for turning the Authorization: header into
+ // parameters, has to do some unescaping
+ // Can filter out any non-oauth parameters if needed (default behaviour)
+ // May 28th, 2010 - method updated to tjerk.meesters for a speed improvement.
+ // see http://code.google.com/p/oauth/issues/detail?id=163
+ public static function split_header($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 $obj;
- }/*}}}*/
+ return $params;
+ }
- function lookup_nonce($consumer, $token, $nonce, $timestamp) {/*{{{*/
- if (dba_exists("nonce_$nonce", $this->dbh)) {
- return TRUE;
+ // 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
+ $headers = apache_request_headers();
+
+ // sanitize the output of apache_request_headers because
+ // we always want the keys to be Cased-Like-This and arh()
+ // returns the headers in the same case as they are in the
+ // request
+ $out = array();
+ foreach ($headers AS $key => $value) {
+ $key = str_replace(
+ " ",
+ "-",
+ ucwords(strtolower(str_replace("-", " ", $key)))
+ );
+ $out[$key] = $value;
+ }
} else {
- dba_insert("nonce_$nonce", "1", $this->dbh);
- return FALSE;
+ // otherwise we don't have apache and are just going to have to hope
+ // that $_SERVER actually contains what we need
+ $out = array();
+ if( isset($_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_") {
+ // 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] = $value;
+ }
+ }
}
- }/*}}}*/
-
- function new_token($consumer, $type="request") {/*{{{*/
- $key = md5(time());
- $secret = time() + time();
- $token = new OAuthToken($key, md5(md5($secret)));
- if (!dba_insert("${type}_$key", serialize($token), $this->dbh)) {
- throw new OAuthException("doooom!");
+ 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 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[$parameter])) {
+ // We have already recieved parameter(s) with this name, so add to the list
+ // of parameters with this name
+
+ if (is_scalar($parsed_parameters[$parameter])) {
+ // This is the first duplicate, so transform scalar (string) into an array
+ // so we can add the duplicates
+ $parsed_parameters[$parameter] = array($parsed_parameters[$parameter]);
+ }
+
+ $parsed_parameters[$parameter][] = $value;
+ } else {
+ $parsed_parameters[$parameter] = $value;
+ }
}
- return $token;
- }/*}}}*/
+ return $parsed_parameters;
+ }
- function new_request_token($consumer) {/*{{{*/
- return $this->new_token($consumer, "request");
- }/*}}}*/
+ public static function build_http_query($params) {
+ if (!$params) return '';
- function new_access_token($token, $consumer) {/*{{{*/
+ // Urlencode both keys and values
+ $keys = OAuthUtil::urlencode_rfc3986(array_keys($params));
+ $values = OAuthUtil::urlencode_rfc3986(array_values($params));
+ $params = array_combine($keys, $values);
- $token = $this->new_token($consumer, 'access');
- dba_delete("request_" . $token->key, $this->dbh);
- return $token;
- }/*}}}*/
-}/*}}}*/
-
-class OAuthUtil {/*{{{*/
- public static function urlencode_rfc3986($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($input)));
- } else {
- return '';
- }
- }/*}}}*/
-
+ // Parameters are sorted by name, using lexicographical byte value ordering.
+ // Ref: Spec: 9.1.1 (1)
+ uksort($params, 'strcmp');
- // 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($string) {/*{{{*/
- return rawurldecode($string);
- }/*}}}*/
-}/*}}}*/
+ $pairs = array();
+ foreach ($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)
+ // June 12th, 2010 - changed to sort because of issue 164 by hidetaka
+ sort($value, SORT_STRING);
+ foreach ($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);
+ }
+}
?>
projects / quix0rs-gnu-social.git / blobdiff