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PATH: home / letacommog / letaweb / admin / classes / payments / paypal-sdk-core / lib / auth

<?php

//PayPal specific modification starts
//Method to be called for generating signature

class AuthSignature
{
    public function genSign($key, $secret, $token, $tokenSecret, $httpMethod, $endpoint)
    {
        $authServer = new OAuthServer(new MockOAuthDataStore());
        $hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
        $authServer->add_signature_method($hmac_method);

$sig_method = $hmac_method;
        $authConsumer = new OAuthConsumer($key, $secret, null);
        $authToken = null;
        $authToken = new OAuthToken($token, $tokenSecret);

//$params is the query param array which is required only in the httpMethod is "GET"
        $params = array();
        //TODO: set the Query parameters to $params if httpMethod is "GET"

$acc_req = OAuthRequest::from_consumer_and_token($authConsumer, $authToken, $httpMethod, $endpoint, $params);
        $acc_req->sign_request($sig_method, $authConsumer, $authToken);

return  OAuthutil::parseQueryString($acc_req);
    }

public static function generateFullAuthString($key, $secret, $token, $tokenSecret, $httpMethod, $endpoint)
    {
        $authSignature = new self();
        $response = $authSignature->genSign($key, $secret, $token, $tokenSecret, $httpMethod, $endpoint);

return 'token='.$token.
               ',signature='.$response['oauth_signature'].
               ',timestamp='.$response['oauth_timestamp'];
    }
}
//PayPal specific modification ends
/* Generic exception class
 */
class OAuthException extends Exception
{
    // pass
}

class OAuthConsumer
{
    public $key;
    public $secret;

public function __construct($key, $secret, $callback_url = null)
    {
        $this->key = $key;
        $this->secret = $secret;
        $this->callback_url = $callback_url;
    }

public function __toString()
    {
        return "OAuthConsumer[key=$this->key,secret=$this->secret]";
    }
}

class OAuthToken
{
    // access tokens and request tokens
    public $key;
    public $secret;

/**
     * key = the token
     * secret = the token secret.
     */
    public 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.
     */
    public function to_string()
    {
        return 'oauth_token='.
        OAuthUtil::urlencode_rfc3986($this->key).
           '&oauth_token_secret='.
        OAuthUtil::urlencode_rfc3986($this->secret);
    }

public 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();

/**
     * 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;
    }
}

/**
 * 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
{
    public function get_name()
    {
        return 'HMAC-SHA1';
    }

public function build_signature($request, $consumer, $token)
    {
        $base_string = $request->get_signature_base_string();
        $base_string = preg_replace_callback('/(%[A-Za-z0-9]{2})/', array($this, 'replace_callback'), $base_string);//convert base string to lowercase
        $request->base_string = $base_string;

$key_parts = array(
        $consumer->secret,
        ($token) ? $token->secret : '',
        );

$key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
        $key = implode('&', $key_parts);
        $key = preg_replace_callback('/(%[A-Za-z0-9]{2})/', array($this, 'replace_callback'), $key);//convert to lowercase
        return base64_encode(hash_hmac('sha1', $base_string, $key, true));
    }

/**
     * preg_replace_callback callback function.
     */
    private function replace_callback($match)
    {
        return strtolower($match[0]);
    }
}

/**
 * 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';
    }

/**
     * 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 : '',
        );

$key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
        $key = implode('&', $key_parts);
        $request->base_string = $key;

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';
    }

// 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
    abstract protected 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
    abstract protected 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);

// Pull the private key ID from the certificate
        $privatekeyid = openssl_get_privatekey($cert);

// Sign using the key
        $ok = openssl_sign($base_string, $signature, $privatekeyid);

// Release the key resource
        openssl_free_key($privatekeyid);

return base64_encode($signature);
    }

public function check_signature($request, $consumer, $token, $signature)
    {
        $decoded_sig = base64_decode($signature);

$base_string = $request->get_signature_base_string();

// Fetch the public key cert based on the request
        $cert = $this->fetch_public_cert($request);

// Pull the public key ID from the certificate
        $publickeyid = openssl_get_publickey($cert);

// Check the computed signature against the one passed in the query
        $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);

// Release the key resource
        openssl_free_key($publickeyid);

return $ok == 1;
    }
}

class OAuthRequest
{
    public $parameters;
    protected $http_method;
    protected $http_url;
    // for debug purposes
    public $base_string;
    public static $version = '1.0';
    public static $POST_INPUT = 'php://input';

public 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';
        $http_url = ($http_url) ? $http_url : $scheme.
                              '://'.$_SERVER['HTTP_HOST'].
                              ':'.
        $_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);
            }

// 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);
            }
        }

return new self($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)
    {
        $parameters = ($parameters) ?  $parameters : array();
        $defaults = array('oauth_version' => self::$version,
        // "oauth_nonce" => OAuthRequest::generate_nonce(),
        'oauth_timestamp' => self::generate_timestamp(),

'oauth_consumer_key' => $consumer->key, );
        if ($token) {
            $defaults['oauth_token'] = $token->key;
        }

$parameters = array_merge($defaults, $parameters);
        ksort($parameters);

return new self($http_method, $http_url, $parameters);
    }

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]);
            }

$this->parameters[$name][] = $value;
        } else {
            $this->parameters[$name] = $value;
        }
    }

public function get_parameter($name)
    {
        return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
    }

public function get_parameters()
    {
        return $this->parameters;
    }

public function unset_parameter($name)
    {
        unset($this->parameters[$name]);
    }

/**
     * The request parameters, sorted and concatenated into a normalized string.
     *
     * @return string
     */
    public function get_signable_parameters()
    {
        // Grab all parameters
        $params = $this->parameters;
        ksort($params);
        // 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']);
        }
        foreach ($params as $key => $value) {
            $res[] = $key.'='.$value;
        }

return implode('&', $res);
        //return OAuthUtil::build_http_query($params);
    }

/**
     * Returns the base string of this request.
     *
     * The base string defined as the method, the url
     * and the parameters (normalized), each urlencoded
     * and the concated with &.
     */
    public function get_signature_base_string()
    {
        $parts = array(
        $this->get_normalized_http_method(),
        $this->get_normalized_http_url(),
        $this->get_signable_parameters(),
        );

$parts = OAuthUtil::urlencode_rfc3986($parts);

return implode('&', $parts);
    }

/**
     * just uppercases the 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()
    {
        $parts = parse_url($this->http_url);

$scheme = (isset($parts['scheme'])) ? $parts['scheme'] : 'http';
        $port = (isset($parts['port'])) ? $parts['port'] : (($scheme == 'https') ? '443' : '80');
        $host = (isset($parts['host'])) ? $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()
    {
        $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($realm = null)
    {
        $first = true;
        if ($realm) {
            $out = 'Authorization: OAuth realm="'.OAuthUtil::urlencode_rfc3986($realm).'"';
            $first = false;
        } else {
            $out = 'Authorization: OAuth';
        }

$total = array();
        foreach ($this->parameters as $k => $v) {
            if (substr($k, 0, 5) != 'oauth') {
                continue;
            }
            if (is_array($v)) {
                throw new OAuthException('Arrays not supported in headers');
            }
            $out .= ($first) ? ' ' : ',';
            $out .= OAuthUtil::urlencode_rfc3986($k).
              '="'.
            OAuthUtil::urlencode_rfc3986($v).
              '"';
            $first = false;
        }

return $out;
    }

public function __toString()
    {
        return $this->to_url();
    }

public function sign_request($signature_method, $consumer, $token)
    {
        $empty = false;
        $msg = array();
        if ($token->key == null) {
            $msg[] = 'Token key';
        }
        if ($token->secret == null) {
            $msg[] = 'Token secret';
        }
        if ($consumer->key == null) {
            $msg[] = 'Consumer key';
        }
        if ($consumer->secret == null) {
            $msg[] = 'Consumer secret';
        }
        if ($this->http_url == null) {
            $msg[] = 'Endpoint';
        }
        if ($this->http_method == null) {
            $msg[] = 'HTTP method';
        }
        if (count($msg)) {
            throw new OAuthException('Enter valid '.implode(',', $msg));
        }
        $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 = array();

protected $data_store;

public 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);

// 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)
    {
        $this->get_version($request);

$consumer = $this->get_consumer($request);

// requires authorized request token
        $token = $this->get_token($request, $consumer, 'request');

$this->check_signature($request, $consumer, $token);

// 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)
    {
        $this->get_version($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)
    {
        $version = $request->get_parameter('oauth_version');
        if (!$version) {
            // 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 !== $this->version) {
            throw new OAuthException("OAuth version '$version' not supported");
        }

return $version;
    }

/**
     * figure out the signature with some defaults.
     */
    private function get_signature_method($request)
    {
        $signature_method = $request instanceof OAuthRequest
        ? $request->get_parameter('oauth_signature_method')
        : null;

if (!$signature_method) {
            // 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($signature_method,
        array_keys($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 instanceof OAuthRequest
        ? $request->get_parameter('oauth_consumer_key')
        : null;

if (!$consumer_key) {
            throw new OAuthException('Invalid consumer key');
        }

$consumer = $this->data_store->lookup_consumer($consumer_key);
        if (!$consumer) {
            throw new OAuthException('Invalid consumer');
        }

return $consumer;
    }

/**
     * try to find the token for the provided request's token key.
     */
    private function get_token($request, $consumer, $token_type = 'access')
    {
        $token_field = $request instanceof OAuthRequest
        ? $request->get_parameter('oauth_token')
        : null;

$token = $this->data_store->lookup_token(
        $consumer, $token_type, $token_field
        );
        if (!$token) {
            throw new OAuthException("Invalid $token_type token: $token_field");
        }

return $token;
    }

/**
     * 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
        $timestamp = $request instanceof OAuthRequest
        ? $request->get_parameter('oauth_timestamp')
        : null;
        $nonce = $request instanceof OAuthRequest
        ? $request->get_parameter('oauth_nonce')
        : null;

$this->check_timestamp($timestamp);
        $this->check_nonce($consumer, $token, $nonce, $timestamp);

$signature_method = $this->get_signature_method($request);

$signature = $request->get_parameter('oauth_signature');
        $valid_sig = $signature_method->check_signature(
        $request,
        $consumer,
        $token,
        $signature
        );

if (!$valid_sig) {
            throw new OAuthException('Invalid signature');
        }
    }

/**
     * check that the timestamp is new enough.
     */
    private function check_timestamp($timestamp)
    {
        if (!$timestamp) {
            throw new OAuthException(
        'Missing timestamp parameter. The parameter is required'
        );
        }

// verify that timestamp is recentish
        $now = time();
        if (abs($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, $timestamp)
    {
        if (!$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,
        $timestamp
        );
        if ($found) {
            throw new OAuthException("Nonce already used: $nonce");
        }
    }
}

class OAuthDataStore
{
    public function lookup_consumer($consumer_key)
    {
        // implement me
    }

public function lookup_token($consumer, $token_type, $token)
    {
        // implement me
    }

public function lookup_nonce($consumer, $token, $nonce, $timestamp)
    {
        // implement me
    }

public function new_request_token($consumer, $callback = null)
    {
        // return a new token attached to this consumer
    }

public 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
    }
}

class OAuthUtil
{
    public static function urlencode_rfc3986($input)
    {
        if (is_array($input)) {
            return array_map(array('OAuthUtil', 'urlencode_rfc3986'), $input);
        } elseif (is_scalar($input)) {
            $tmp1 = str_replace('%7E', '~', rawurlencode($input));
            $tmp2 = str_replace('.', '%2E', $tmp1);
            $tmp3 = str_replace('*', '%2A', $tmp2);
            $tmp4 = str_replace('+', ' ', $tmp3);
            $tmp = str_replace('-', '%2D', $tmp4);

return $tmp;
            /*$tmp1=str_replace('%7E', '~', rawurlencode($input));
             $tmp2= str_replace(".","%2E",$tmp1);
                 
                 
             return $tmp;*/
        } else {
            return '';
        }
    }
    public static function parseQueryString($str)
    {
        $op = array();
        $pairs = explode('&', $str);
        foreach ($pairs as $pair) {
            list($k, $v) = array_map('urldecode', explode('=', $pair));
            $op[$k] = $v;
        }

return $op;
    }
    //parses string to associative array -modified for PayPal Signature

// 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)
    // 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] = self::urldecode_rfc3986(empty($matches[3][$i]) ? $matches[4][$i] : $matches[3][$i]);
            }
            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
            $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 {
            // 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;
                }
            }
        }

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);
            $parameter = self::urldecode_rfc3986($split[0]);
            $value = isset($split[1]) ? self::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 $parsed_parameters;
    }

public static function build_http_query($params)
    {
        if (!$params) {
            return '';
        }

// Urlencode both keys and values
        $keys = self::urlencode_rfc3986(array_keys($params));
        $values = self::urlencode_rfc3986(array_values($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');

$pairs = array();
        foreach ($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);
    }
}

[+] ..
[-] IPPCredential.php [edit]
[-] PPSubjectAuthorization.php [edit]
[-] PPTokenAuthorization.php [edit]
[-] AuthUtil.php [edit]
[-] PPCertificateCredential.php [edit]
[-] PPAuth.php [edit]
[-] PPSignatureCredential.php [edit]
[+] openid
[-] IPPThirdPartyAuthorization.php [edit]