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<?php
/**
* OAuthSimple - A simpler version of OAuth
*
* https://github.com/jrconlin/oauthsimple
*
* @author jr conlin <src@jrconlin.com>
* @copyright unitedHeroes.net 2011
* @version 1.3
* @license See license.txt
*
*/
class OAuthSimple {
private $_secrets;
private $_default_signature_method;
private $_action;
private $_nonce_chars;
/**
* Constructor
*
* @access public
* @param api_key (String) The API Key (sometimes referred to as the consumer key) This value is usually supplied by the site you wish to use.
* @param shared_secret (String) The shared secret. This value is also usually provided by the site you wish to use.
* @return OAuthSimple (Object)
*/
function __construct ($APIKey = "", $sharedSecret=""){
if (!empty($APIKey))
{
$this->_secrets['consumer_key'] = $APIKey;
}
if (!empty($sharedSecret))
{
$this->_secrets['shared_secret'] = $sharedSecret;
}
$this->_default_signature_method = "HMAC-SHA1";
$this->_action = "GET";
$this->_nonce_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
return $this;
}
/**
* Reset the parameters and URL
*
* @access public
* @return OAuthSimple (Object)
*/
public function reset() {
$this->_parameters = Array();
$this->path = NULL;
$this->sbs = NULL;
return $this;
}
/**
* Set the parameters either from a hash or a string
*
* @access public
* @param(string, object) List of parameters for the call, this can either be a URI string (e.g. "foo=bar&gorp=banana" or an object/hash)
* @return OAuthSimple (Object)
*/
public function setParameters ($parameters=Array()) {
if (is_string($parameters))
{
$parameters = $this->_parseParameterString($parameters);
}
if (empty($this->_parameters))
{
$this->_parameters = $parameters;
}
else if (!empty($parameters))
{
$this->_parameters = array_merge($this->_parameters,$parameters);
}
if (empty($this->_parameters['oauth_nonce']))
{
$this->_getNonce();
}
if (empty($this->_parameters['oauth_timestamp']))
{
$this->_getTimeStamp();
}
if (empty($this->_parameters['oauth_consumer_key']))
{
$this->_getApiKey();
}
if (empty($this->_parameters['oauth_token']))
{
$this->_getAccessToken();
}
if (empty($this->_parameters['oauth_signature_method']))
{
$this->setSignatureMethod();
}
if (empty($this->_parameters['oauth_version']))
{
$this->_parameters['oauth_version']="1.0";
}
return $this;
}
/**
* Convenience method for setParameters
*
* @access public
* @see setParameters
*/
public function setQueryString ($parameters)
{
return $this->setParameters($parameters);
}
/**
* Set the target URL (does not include the parameters)
*
* @param path (String) the fully qualified URI (excluding query arguments) (e.g "http://example.org/foo")
* @return OAuthSimple (Object)
*/
public function setURL ($path)
{
if (empty($path))
{
throw new OAuthSimpleException('No path specified for OAuthSimple.setURL');
}
$this->_path=$path;
return $this;
}
/**
* Convenience method for setURL
*
* @param path (String)
* @see setURL
*/
public function setPath ($path)
{
return $this->_path=$path;
}
/**
* Set the "action" for the url, (e.g. GET,POST, DELETE, etc.)
*
* @param action (String) HTTP Action word.
* @return OAuthSimple (Object)
*/
public function setAction ($action)
{
if (empty($action))
{
$action = 'GET';
}
$action = strtoupper($action);
if (preg_match('/[^A-Z]/',$action))
{
throw new OAuthSimpleException('Invalid action specified for OAuthSimple.setAction');
}
$this->_action = $action;
return $this;
}
/**
* Set the signatures (as well as validate the ones you have)
*
* @param signatures (object) object/hash of the token/signature pairs {api_key:, shared_secret:, oauth_token: oauth_secret:}
* @return OAuthSimple (Object)
*/
public function signatures ($signatures)
{
if (!empty($signatures) && !is_array($signatures))
{
throw new OAuthSimpleException('Must pass dictionary array to OAuthSimple.signatures');
}
if (!empty($signatures))
{
if (empty($this->_secrets))
{
$this->_secrets=Array();
}
$this->_secrets=array_merge($this->_secrets,$signatures);
}
if (isset($this->_secrets['api_key']))
{
$this->_secrets['consumer_key'] = $this->_secrets['api_key'];
}
if (isset($this->_secrets['access_token']))
{
$this->_secrets['oauth_token'] = $this->_secrets['access_token'];
}
if (isset($this->_secrets['access_secret']))
{
$this->_secrets['oauth_secret'] = $this->_secrets['access_secret'];
}
if (isset($this->_secrets['access_token_secret']))
{
$this->_secrets['oauth_secret'] = $this->_secrets['access_token_secret'];
}
if (empty($this->_secrets['consumer_key']))
{
throw new OAuthSimpleException('Missing required consumer_key in OAuthSimple.signatures');
}
if (empty($this->_secrets['shared_secret']))
{
throw new OAuthSimpleException('Missing requires shared_secret in OAuthSimple.signatures');
}
if (!empty($this->_secrets['oauth_token']) && empty($this->_secrets['oauth_secret']))
{
throw new OAuthSimpleException('Missing oauth_secret for supplied oauth_token in OAuthSimple.signatures');
}
return $this;
}
public function setTokensAndSecrets($signatures)
{
return $this->signatures($signatures);
}
/**
* Set the signature method (currently only Plaintext or SHA-MAC1)
*
* @param method (String) Method of signing the transaction (only PLAINTEXT and SHA-MAC1 allowed for now)
* @return OAuthSimple (Object)
*/
public function setSignatureMethod ($method="")
{
if (empty($method))
{
$method = $this->_default_signature_method;
}
$method = strtoupper($method);
switch($method)
{
case 'PLAINTEXT':
case 'HMAC-SHA1':
$this->_parameters['oauth_signature_method']=$method;
break;
default:
throw new OAuthSimpleException ("Unknown signing method $method specified for OAuthSimple.setSignatureMethod");
break;
}
return $this;
}
/** sign the request
*
* note: all arguments are optional, provided you've set them using the
* other helper functions.
*
* @param args (Array) hash of arguments for the call {action, path, parameters (array), method, signatures (array)} all arguments are optional.
* @return (Array) signed values
*/
public function sign($args=array())
{
if (!empty($args['action']))
{
$this->setAction($args['action']);
}
if (!empty($args['path']))
{
$this->setPath($args['path']);
}
if (!empty($args['method']))
{
$this->setSignatureMethod($args['method']);
}
if (!empty($args['signatures']))
{
$this->signatures($args['signatures']);
}
if (empty($args['parameters']))
{
$args['parameters']=array();
}
$this->setParameters($args['parameters']);
$normParams = $this->_normalizedParameters();
$this->_parameters['oauth_signature'] = $this->_generateSignature($normParams);
return Array (
'parameters' => $this->_parameters,
'signature' => self::_oauthEscape($this->_parameters['oauth_signature']),
'signed_url' => $this->_path . '?' . $this->_normalizedParameters(),
'header' => $this->getHeaderString(),
'sbs'=> $this->sbs
);
}
/**
* Return a formatted "header" string
*
* NOTE: This doesn't set the "Authorization: " prefix, which is required.
* It's not set because various set header functions prefer different
* ways to do that.
*
* @param args (Array)
* @return $result (String)
*/
public function getHeaderString ($args=array())
{
if (empty($this->_parameters['oauth_signature']))
{
$this->sign($args);
}
$result = 'OAuth ';
foreach ($this->_parameters as $pName => $pValue)
{
if (strpos($pName,'oauth_') !== 0)
{
continue;
}
if (is_array($pValue))
{
foreach ($pValue as $val)
{
$result .= $pName .'="' . self::_oauthEscape($val) . '", ';
}
}
else
{
$result .= $pName . '="' . self::_oauthEscape($pValue) . '", ';
}
}
return preg_replace('/, $/','',$result);
}
private function _parseParameterString ($paramString)
{
$elements = explode('&',$paramString);
$result = array();
foreach ($elements as $element)
{
list ($key,$token) = explode('=',$element);
if ($token)
{
$token = urldecode($token);
}
if (!empty($result[$key]))
{
if (!is_array($result[$key]))
{
$result[$key] = array($result[$key],$token);
}
else
{
array_push($result[$key],$token);
}
}
else
$result[$key]=$token;
}
return $result;
}
private static function _oauthEscape($string)
{
if ($string === 0) { return 0; }
if ($string == '0') { return '0'; }
if (strlen($string) == 0) { return ''; }
if (is_array($string)) {
throw new OAuthSimpleException('Array passed to _oauthEscape');
}
$string = rawurlencode($string);
//FIX: rawurlencode of ~
$string = str_replace('%7E','~', $string);
$string = str_replace('+','%20',$string);
$string = str_replace('!','%21',$string);
$string = str_replace('*','%2A',$string);
$string = str_replace('\'','%27',$string);
$string = str_replace('(','%28',$string);
$string = str_replace(')','%29',$string);
return $string;
}
private function _getNonce($length=5)
{
$result = '';
$cLength = strlen($this->_nonce_chars);
for ($i=0; $i < $length; $i++)
{
$rnum = rand(0,$cLength);
$result .= substr($this->_nonce_chars,$rnum,1);
}
$this->_parameters['oauth_nonce'] = $result;
return $result;
}
private function _getApiKey()
{
if (empty($this->_secrets['consumer_key']))
{
throw new OAuthSimpleException('No consumer_key set for OAuthSimple');
}
$this->_parameters['oauth_consumer_key']=$this->_secrets['consumer_key'];
return $this->_parameters['oauth_consumer_key'];
}
private function _getAccessToken()
{
if (!isset($this->_secrets['oauth_secret']))
{
return '';
}
if (!isset($this->_secrets['oauth_token']))
{
throw new OAuthSimpleException('No access token (oauth_token) set for OAuthSimple.');
}
$this->_parameters['oauth_token'] = $this->_secrets['oauth_token'];
return $this->_parameters['oauth_token'];
}
private function _getTimeStamp()
{
return $this->_parameters['oauth_timestamp'] = time();
}
private function _normalizedParameters()
{
$normalized_keys = array();
$return_array = array();
foreach ( $this->_parameters as $paramName=>$paramValue) {
if (!preg_match('/\w+_secret/',$paramName) OR (strpos($paramValue, '@') !== 0 && !file_exists(substr($paramValue, 1))) )
{
if (is_array($paramValue))
{
$normalized_keys[self::_oauthEscape($paramName)] = array();
foreach($paramValue as $item)
{
array_push($normalized_keys[self::_oauthEscape($paramName)], self::_oauthEscape($item));
}
}
else
{
$normalized_keys[self::_oauthEscape($paramName)] = self::_oauthEscape($paramValue);
}
}
}
ksort($normalized_keys);
foreach($normalized_keys as $key=>$val)
{
if (is_array($val))
{
sort($val);
foreach($val as $element)
{
array_push($return_array, $key . "=" . $element);
}
}
else
{
array_push($return_array, $key .'='. $val);
}
}
return join("&", $return_array);
}
private function _generateSignature ()
{
$secretKey = '';
if(isset($this->_secrets['shared_secret']))
{
$secretKey = self::_oauthEscape($this->_secrets['shared_secret']);
}
$secretKey .= '&';
if(isset($this->_secrets['oauth_secret']))
{
$secretKey .= self::_oauthEscape($this->_secrets['oauth_secret']);
}
switch($this->_parameters['oauth_signature_method'])
{
case 'PLAINTEXT':
return urlencode($secretKey);;
case 'HMAC-SHA1':
$this->sbs = self::_oauthEscape($this->_action).'&'.self::_oauthEscape($this->_path).'&'.self::_oauthEscape($this->_normalizedParameters());
return base64_encode(hash_hmac('sha1',$this->sbs,$secretKey,TRUE));
default:
throw new OAuthSimpleException('Unknown signature method for OAuthSimple');
break;
}
}
}
class OAuthSimpleException extends Exception {
public function __construct($err, $isDebug = FALSE)
{
self::log_error($err);
if ($isDebug)
{
self::display_error($err, TRUE);
}
}
public static function log_error($err)
{
error_log($err, 0);
}
public static function display_error($err, $kill = FALSE)
{
print_r($err);
if ($kill === FALSE)
{
die();
}
}
}
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