<?php
/**
* URI normalization routines.
*
* @package OpenID
* @author JanRain, Inc. <openid@janrain.com>
* @copyright 2005-2008 Janrain, Inc.
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache
*/
require_once 'Auth/Yadis/Misc.php';
// from appendix B of rfc 3986 (http://www.ietf.org/rfc/rfc3986.txt)
function Auth_OpenID_getURIPattern()
{
return '&^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?&';
}
function Auth_OpenID_getAuthorityPattern()
{
return '/^([^@]*@)?([^:]*)(:.*)?/';
}
function Auth_OpenID_getEncodedPattern()
{
return '/%([0-9A-Fa-f]{2})/';
}
# gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@"
#
# sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
# / "*" / "+" / "," / ";" / "="
#
# unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
function Auth_OpenID_getURLIllegalCharRE()
{
return "/([^-A-Za-z0-9:\/\?#\[\]@\!\$&'\(\)\*\+,;=\._~\%])/";
}
function Auth_OpenID_getUnreserved()
{
$_unreserved = array();
for ($i = 0; $i < 256; $i++) {
$_unreserved[$i] = false;
}
for ($i = ord('A'); $i <= ord('Z'); $i++) {
$_unreserved[$i] = true;
}
for ($i = ord('0'); $i <= ord('9'); $i++) {
$_unreserved[$i] = true;
}
for ($i = ord('a'); $i <= ord('z'); $i++) {
$_unreserved[$i] = true;
}
$_unreserved[ord('-')] = true;
$_unreserved[ord('.')] = true;
$_unreserved[ord('_')] = true;
$_unreserved[ord('~')] = true;
return $_unreserved;
}
function Auth_OpenID_getEscapeRE()
{
$parts = array();
foreach (array_merge(Auth_Yadis_getUCSChars(),
Auth_Yadis_getIPrivateChars()) as $pair) {
list($m, $n) = $pair;
$parts[] = sprintf("%s-%s", chr($m), chr($n));
}
return sprintf('[%s]', implode('', $parts));
}
function Auth_OpenID_pct_encoded_replace_unreserved($mo)
{
$_unreserved = Auth_OpenID_getUnreserved();
$i = intval($mo[1], 16);
if ($_unreserved[$i]) {
return chr($i);
} else {
return strtoupper($mo[0]);
}
return $mo[0];
}
function Auth_OpenID_pct_encoded_replace($mo)
{
return chr(intval($mo[1], 16));
}
function Auth_OpenID_remove_dot_segments($path)
{
$result_segments = array();
while ($path) {
if (Auth_Yadis_startswith($path, '../')) {
$path = substr($path, 3);
} else if (Auth_Yadis_startswith($path, './')) {
$path = substr($path, 2);
} else if (Auth_Yadis_startswith($path, '/./')) {
$path = substr($path, 2);
} else if ($path == '/.') {
$path = '/';
} else if (Auth_Yadis_startswith($path, '/../')) {
$path = substr($path, 3);
if ($result_segments) {
array_pop($result_segments);
}
} else if ($path == '/..') {
$path = '/';
if ($result_segments) {
array_pop($result_segments);
}
} else if (($path == '..') ||
($path == '.')) {
$path = '';
} else {
$i = 0;
if ($path[0] == '/') {
$i = 1;
}
$i = strpos($path, '/', $i);
if ($i === false) {
$i = strlen($path);
}
$result_segments[] = substr($path, 0, $i);
$path = substr($path, $i);
}
}
return implode('', $result_segments);
}
function Auth_OpenID_urinorm($uri)
{
$uri_matches = array();
preg_match(Auth_OpenID_getURIPattern(), $uri, $uri_matches);
if (count($uri_matches) < 9) {
for ($i = count($uri_matches); $i <= 9; $i++) {
$uri_matches[] = '';
}
}
$illegal_matches = array();
preg_match(Auth_OpenID_getURLIllegalCharRE(),
$uri, $illegal_matches);
if ($illegal_matches) {
return null;
}
$scheme = $uri_matches[2];
if ($scheme) {
$scheme = strtolower($scheme);
}
$scheme = $uri_matches[2];
if ($scheme === '') {
// No scheme specified
return null;
}
$scheme = strtolower($scheme);
if (!in_array($scheme, array('http', 'https'))) {
// Not an absolute HTTP or HTTPS URI
return null;
}
$authority = $uri_matches[4];
if ($authority === '') {
// Not an absolute URI
return null;
}
$authority_matches = array();
preg_match(Auth_OpenID_getAuthorityPattern(),
$authority, $authority_matches);
if (count($authority_matches) === 0) {
// URI does not have a valid authority
return null;
}
if (count($authority_matches) < 4) {
for ($i = count($authority_matches); $i <= 4; $i++) {
$authority_matches[] = '';
}
}
list($_whole, $userinfo, $host, $port) = $authority_matches;
if ($userinfo === null) {
$userinfo = '';
}
if (strpos($host, '%') !== -1) {
$host = strtolower($host);
$host = preg_replace_callback(
Auth_OpenID_getEncodedPattern(),
'Auth_OpenID_pct_encoded_replace', $host);
// NO IDNA.
// $host = unicode($host, 'utf-8').encode('idna');
} else {
$host = strtolower($host);
}
if ($port) {
if (($port == ':') ||
($scheme == 'http' && $port == ':80') ||
($scheme == 'https' && $port == ':443')) {
$port = '';
}
} else {
$port = '';
}
$authority = $userinfo . $host . $port;
$path = $uri_matches[5];
$path = preg_replace_callback(
Auth_OpenID_getEncodedPattern(),
'Auth_OpenID_pct_encoded_replace_unreserved', $path);
$path = Auth_OpenID_remove_dot_segments($path);
if (!$path) {
$path = '/';
}
$query = $uri_matches[6];
if ($query === null) {
$query = '';
}
$fragment = $uri_matches[8];
if ($fragment === null) {
$fragment = '';
}
return $scheme . '://' . $authority . $path . $query . $fragment;
}
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