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Commit 82682598 by Paul Klimov
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OpenID client created as draft.

parent cdae9b60
Showing with 758 additions and 0 deletions
extensions/yii/authclient/openid/Client.php
...@@ -8,16 +8,773 @@ ...@@ -8,16 +8,773 @@
namespace yii\authclient\openid; namespace yii\authclient\openid;
use yii\base\Component; use yii\base\Component;
use yii\base\Exception;
use yii\base\NotSupportedException;
/** /**
* Class Client * Class Client
* *
* @see http://openid.net/ * @see http://openid.net/
* *
* @property string $returnUrl ???
* @property mixed $identity ???
* @property string $trustRoot ???
* @property string $realm alias of [[trustRoot]].
* @property mixed $mode ??? This property is read-only.
*
* @author Paul Klimov <klimov.paul@gmail.com> * @author Paul Klimov <klimov.paul@gmail.com>
* @since 2.0 * @since 2.0
*/ */
class Client extends Component class Client extends Component
{ {
public $required = [];
public $optional = [];
public $verify_peer;
public $capath;
public $cainfo;
private $_returnUrl;
private $_identity;
private $claimed_id;
private $_trustRoot;
protected $server;
protected $version;
protected $aliases;
protected $identifier_select = false;
protected $ax = false;
protected $sreg = false;
protected $data;
public static $axToSregMap = [
'namePerson/friendly' => 'nickname',
'contact/email' => 'email',
'namePerson' => 'fullname',
'birthDate' => 'dob',
'person/gender' => 'gender',
'contact/postalCode/home' => 'postcode',
'contact/country/home' => 'country',
'pref/language' => 'language',
'pref/timezone' => 'timezone',
];
/**
* @inheritdoc
*/
public function init()
{
$this->data = $_POST + $_GET; # OPs may send data as POST or GET.
}
public function setIdentity($value)
{
if (strlen($value = trim((String) $value))) {
if (preg_match('#^xri:/*#i', $value, $m)) {
$value = substr($value, strlen($m[0]));
} elseif (!preg_match('/^(?:[=@+\$!\(]|https?:)/i', $value)) {
$value = "http://$value";
}
if (preg_match('#^https?://[^/]+$#i', $value, $m)) {
$value .= '/';
}
}
$this->_identity = $value;
$this->claimed_id = $value;
}
public function setReturnUrl($returnUrl)
{
$this->_returnUrl = $returnUrl;
}
public function getReturnUrl()
{
if ($this->_returnUrl === null) {
$uri = rtrim(preg_replace('#((?<=\?)|&)openid\.[^&]+#', '', $_SERVER['REQUEST_URI']), '?');
$this->_returnUrl = $this->getTrustRoot() . $uri;
}
return $this->_returnUrl;
}
public function getIdentity()
{
# We return claimed_id instead of identity,
# because the developer should see the claimed identifier,
# i.e. what he set as identity, not the op-local identifier (which is what we verify)
return $this->claimed_id;
}
public function setTrustRoot($value)
{
$this->_trustRoot = trim($value);
}
public function getTrustRoot()
{
if ($this->_trustRoot === null) {
$this->_trustRoot = (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'];
}
return $this->_trustRoot;
}
public function setRealm($value)
{
$this->setTrustRoot($value);
}
public function getRealm()
{
return $this->getTrustRoot();
}
public function getMode()
{
return empty($this->data['openid_mode']) ? null : $this->data['openid_mode'];
}
/**
* Checks if the server specified in the url exists.
* @param string $url URL to check
* @return boolean true, if the server exists; false otherwise
*/
public function hostExists($url)
{
if (strpos($url, '/') === false) {
$server = $url;
} else {
$server = @parse_url($url, PHP_URL_HOST);
}
if (!$server) {
return false;
}
$ips = gethostbynamel($server);
return !empty($ips);
}
protected function sendCurlRequest($url, $method = 'GET', $params = [])
{
$params = http_build_query($params, '', '&');
$curl = curl_init($url . ($method == 'GET' && $params ? '?' . $params : ''));
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*'));
if ($this->verify_peer !== null) {
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verify_peer);
if($this->capath) {
curl_setopt($curl, CURLOPT_CAPATH, $this->capath);
}
if($this->cainfo) {
curl_setopt($curl, CURLOPT_CAINFO, $this->cainfo);
}
}
if ($method == 'POST') {
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
} elseif ($method == 'HEAD') {
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_NOBODY, true);
} else {
curl_setopt($curl, CURLOPT_HTTPGET, true);
}
$response = curl_exec($curl);
if ($method == 'HEAD') {
$headers = [];
foreach (explode("\n", $response) as $header) {
$pos = strpos($header,':');
$name = strtolower(trim(substr($header, 0, $pos)));
$headers[$name] = trim(substr($header, $pos+1));
}
# Updating claimed_id in case of redirections.
$effective_url = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
if ($effective_url != $url) {
$this->identity = $this->claimed_id = $effective_url;
}
return $headers;
}
if (curl_errno($curl)) {
throw new Exception(curl_error($curl), curl_errno($curl));
}
return $response;
}
protected function sendStreamRequest($url, $method = 'GET', $params = [])
{
if (!$this->hostExists($url)) {
throw new Exception('Invalid request.');
}
$params = http_build_query($params, '', '&');
switch ($method) {
case 'GET':
$options = [
'http' => [
'method' => 'GET',
'header' => 'Accept: application/xrds+xml, */*',
'ignore_errors' => true,
]
];
$url = $url . ($params ? '?' . $params : '');
break;
case 'POST':
$options = [
'http' => [
'method' => 'POST',
'header' => 'Content-type: application/x-www-form-urlencoded',
'content' => $params,
'ignore_errors' => true,
]
];
break;
case 'HEAD':
# We want to send a HEAD request,
# but since get_headers doesn't accept $context parameter,
# we have to change the defaults.
$default = stream_context_get_options(stream_context_get_default());
stream_context_get_default([
'http' => [
'method' => 'HEAD',
'header' => 'Accept: application/xrds+xml, */*',
'ignore_errors' => true,
]
]);
$url = $url . ($params ? '?' . $params : '');
$headers_tmp = get_headers($url);
if (!$headers_tmp) {
return [];
}
# Parsing headers.
$headers = [];
foreach ($headers_tmp as $header) {
$pos = strpos($header, ':');
$name = strtolower(trim(substr($header, 0, $pos)));
$headers[$name] = trim(substr($header, $pos+1));
# Following possible redirections. The point is just to have
# claimed_id change with them, because get_headers() will
# follow redirections automatically.
# We ignore redirections with relative paths.
# If any known provider uses them, file a bug report.
if ($name == 'location') {
if (strpos($headers[$name], 'http') === 0) {
$this->identity = $this->claimed_id = $headers[$name];
} elseif($headers[$name][0] == '/') {
$parsed_url = parse_url($this->claimed_id);
$this->identity =
$this->claimed_id = $parsed_url['scheme'] . '://'
. $parsed_url['host']
. $headers[$name];
}
}
}
# And restore them.
stream_context_get_default($default);
return $headers;
default:
throw new NotSupportedException("Method {$method} not supported");
}
if ($this->verify_peer) {
$options = array_merge(
$options,
[
'ssl' => [
'verify_peer' => true,
'capath' => $this->capath,
'cafile' => $this->cainfo,
]
]
);
}
$context = stream_context_create($options);
return file_get_contents($url, false, $context);
}
protected function sendRequest($url, $method = 'GET', $params = [])
{
if (function_exists('curl_init') && !ini_get('safe_mode')) {
return $this->sendCurlRequest($url, $method, $params);
}
return $this->sendStreamRequest($url, $method, $params);
}
protected function buildUrl($url, $parts)
{
if (isset($url['query'], $parts['query'])) {
$parts['query'] = $url['query'] . '&' . $parts['query'];
}
$url = $parts + $url;
$url = $url['scheme'] . '://'
. (empty($url['username']) ? ''
:(empty($url['password']) ? "{$url['username']}@"
:"{$url['username']}:{$url['password']}@"))
. $url['host']
. (empty($url['port']) ? '' : ":{$url['port']}")
. (empty($url['path']) ? '' : $url['path'])
. (empty($url['query']) ? '' : "?{$url['query']}")
. (empty($url['fragment']) ? '' : "#{$url['fragment']}");
return $url;
}
/**
* Helper function used to scan for <meta>/<link> tags and extract information
* from them
*/
protected function extractHtmlTagValue($content, $tag, $attrName, $attrValue, $valueName)
{
preg_match_all("#<{$tag}[^>]*$attrName=['\"].*?$attrValue.*?['\"][^>]*$valueName=['\"](.+?)['\"][^>]*/?>#i", $content, $matches1);
preg_match_all("#<{$tag}[^>]*$valueName=['\"](.+?)['\"][^>]*$attrName=['\"].*?$attrValue.*?['\"][^>]*/?>#i", $content, $matches2);
$result = array_merge($matches1[1], $matches2[1]);
return empty($result) ? false : $result[0];
}
/**
* Performs Yadis and HTML discovery. Normally not used.
* @param string $url Identity URL.
* @return string OP Endpoint (i.e. OpenID provider address).
* @throws Exception
*/
public function discover($url)
{
if (!$url) {
throw new Exception('No identity supplied.');
}
# Use xri.net proxy to resolve i-name identities
if (!preg_match('#^https?:#', $url)) {
$url = "https://xri.net/$url";
}
# We save the original url in case of Yadis discovery failure.
# It can happen when we'll be lead to an XRDS document
# which does not have any OpenID2 services.
$originalUrl = $url;
# A flag to disable yadis discovery in case of failure in headers.
$yadis = true;
# We'll jump a maximum of 5 times, to avoid endless redirections.
for ($i = 0; $i < 5; $i ++) {
if ($yadis) {
$headers = $this->sendRequest($url, 'HEAD');
$next = false;
if (isset($headers['x-xrds-location'])) {
$url = $this->buildUrl(parse_url($url), parse_url(trim($headers['x-xrds-location'])));
$next = true;
}
if (isset($headers['content-type'])
&& (strpos($headers['content-type'], 'application/xrds+xml') !== false
|| strpos($headers['content-type'], 'text/xml') !== false)
) {
# Apparently, some providers return XRDS documents as text/html.
# While it is against the spec, allowing this here shouldn't break
# compatibility with anything.
# ---
# Found an XRDS document, now let's find the server, and optionally delegate.
$content = $this->sendRequest($url, 'GET');
preg_match_all('#<Service.*?>(.*?)</Service>#s', $content, $m);
foreach ($m[1] as $content) {
$content = ' ' . $content; # The space is added, so that strpos doesn't return 0.
# OpenID 2
$ns = preg_quote('http://specs.openid.net/auth/2.0/');
if (preg_match('#<Type>\s*'.$ns.'(server|signon)\s*</Type>#s', $content, $type)) {
if ($type[1] == 'server') {
$this->identifier_select = true;
}
preg_match('#<URI.*?>(.*)</URI>#', $content, $server);
preg_match('#<(Local|Canonical)ID>(.*)</\1ID>#', $content, $delegate);
if (empty($server)) {
return false;
}
# Does the server advertise support for either AX or SREG?
$this->ax = (bool) strpos($content, '<Type>http://openid.net/srv/ax/1.0</Type>');
$this->sreg = strpos($content, '<Type>http://openid.net/sreg/1.0</Type>')
|| strpos($content, '<Type>http://openid.net/extensions/sreg/1.1</Type>');
$server = $server[1];
if (isset($delegate[2])) {
$this->identity = trim($delegate[2]);
}
$this->version = 2;
$this->server = $server;
return $server;
}
# OpenID 1.1
$ns = preg_quote('http://openid.net/signon/1.1');
if (preg_match('#<Type>\s*'.$ns.'\s*</Type>#s', $content)) {
preg_match('#<URI.*?>(.*)</URI>#', $content, $server);
preg_match('#<.*?Delegate>(.*)</.*?Delegate>#', $content, $delegate);
if (empty($server)) {
return false;
}
# AX can be used only with OpenID 2.0, so checking only SREG
$this->sreg = strpos($content, '<Type>http://openid.net/sreg/1.0</Type>')
|| strpos($content, '<Type>http://openid.net/extensions/sreg/1.1</Type>');
$server = $server[1];
if (isset($delegate[1])) {
$this->identity = $delegate[1];
}
$this->version = 1;
$this->server = $server;
return $server;
}
}
$next = true;
$yadis = false;
$url = $originalUrl;
$content = null;
break;
}
if ($next) {
continue;
}
# There are no relevant information in headers, so we search the body.
$content = $this->sendRequest($url, 'GET');
$location = $this->extractHtmlTagValue($content, 'meta', 'http-equiv', 'X-XRDS-Location', 'content');
if ($location) {
$url = $this->buildUrl(parse_url($url), parse_url($location));
continue;
}
}
if (!isset($content)) {
$content = $this->sendRequest($url, 'GET');
}
# At this point, the YADIS Discovery has failed, so we'll switch
# to openid2 HTML discovery, then fallback to openid 1.1 discovery.
$server = $this->extractHtmlTagValue($content, 'link', 'rel', 'openid2.provider', 'href');
$delegate = $this->extractHtmlTagValue($content, 'link', 'rel', 'openid2.local_id', 'href');
$this->version = 2;
if (!$server) {
# The same with openid 1.1
$server = $this->extractHtmlTagValue($content, 'link', 'rel', 'openid.server', 'href');
$delegate = $this->extractHtmlTagValue($content, 'link', 'rel', 'openid.delegate', 'href');
$this->version = 1;
}
if ($server) {
# We found an OpenID2 OP Endpoint
if ($delegate) {
# We have also found an OP-Local ID.
$this->identity = $delegate;
}
$this->server = $server;
return $server;
}
throw new Exception('No servers found!');
}
throw new Exception('Endless redirection!');
}
protected function sregParams()
{
$params = [];
# We always use SREG 1.1, even if the server is advertising only support for 1.0.
# That's because it's fully backwards compatibile with 1.0, and some providers
# advertise 1.0 even if they accept only 1.1. One such provider is myopenid.com
$params['openid.ns.sreg'] = 'http://openid.net/extensions/sreg/1.1';
if ($this->required) {
$params['openid.sreg.required'] = [];
foreach ($this->required as $required) {
if (!isset(self::$axToSregMap[$required])) {
continue;
}
$params['openid.sreg.required'][] = self::$axToSregMap[$required];
}
$params['openid.sreg.required'] = implode(',', $params['openid.sreg.required']);
}
if ($this->optional) {
$params['openid.sreg.optional'] = [];
foreach ($this->optional as $optional) {
if (!isset(self::$axToSregMap[$optional])) {
continue;
}
$params['openid.sreg.optional'][] = self::$axToSregMap[$optional];
}
$params['openid.sreg.optional'] = implode(',', $params['openid.sreg.optional']);
}
return $params;
}
protected function axParams()
{
$params = [];
if ($this->required || $this->optional) {
$params['openid.ns.ax'] = 'http://openid.net/srv/ax/1.0';
$params['openid.ax.mode'] = 'fetch_request';
$this->aliases = [];
$counts = [];
$required = [];
$optional = [];
foreach (['required', 'optional'] as $type) {
foreach ($this->$type as $alias => $field) {
if (is_int($alias)) {
$alias = strtr($field, '/', '_');
}
$this->aliases[$alias] = 'http://axschema.org/' . $field;
if (empty($counts[$alias])) {
$counts[$alias] = 0;
}
$counts[$alias] += 1;
${$type}[] = $alias;
}
}
foreach ($this->aliases as $alias => $ns) {
$params['openid.ax.type.' . $alias] = $ns;
}
foreach ($counts as $alias => $count) {
if ($count == 1) {
continue;
}
$params['openid.ax.count.' . $alias] = $count;
}
# Don't send empty ax.requied and ax.if_available.
# Google and possibly other providers refuse to support ax when one of these is empty.
if ($required) {
$params['openid.ax.required'] = implode(',', $required);
}
if ($optional) {
$params['openid.ax.if_available'] = implode(',', $optional);
}
}
return $params;
}
protected function authUrlV1()
{
$returnUrl = $this->returnUrl;
# If we have an openid.delegate that is different from our claimed id,
# we need to somehow preserve the claimed id between requests.
# The simplest way is to just send it along with the return_to url.
if ($this->identity != $this->claimed_id) {
$returnUrl .= (strpos($returnUrl, '?') ? '&' : '?') . 'openid.claimed_id=' . $this->claimed_id;
}
$params = array_merge(
$this->sregParams(),
[
'openid.return_to' => $returnUrl,
'openid.mode' => 'checkid_setup',
'openid.identity' => $this->identity,
'openid.trust_root' => $this->trustRoot,
]
);
return $this->buildUrl(parse_url($this->server), ['query' => http_build_query($params, '', '&')]);
}
protected function authUrlV2($identifierSelect)
{
$params = [
'openid.ns' => 'http://specs.openid.net/auth/2.0',
'openid.mode' => 'checkid_setup',
'openid.return_to' => $this->returnUrl,
'openid.realm' => $this->trustRoot,
];
if ($this->ax) {
$params = array_merge($this->axParams(), $params);
}
if ($this->sreg) {
$params = array_merge($this->sregParams(), $params);
}
if (!$this->ax && !$this->sreg) {
# If OP doesn't advertise either SREG, nor AX, let's send them both
# in worst case we don't get anything in return.
$params = array_merge($this->sregParams(), $this->axParams(), $params);
}
if ($identifierSelect) {
$url = 'http://specs.openid.net/auth/2.0/identifier_select';
$params['openid.identity'] = $url;
$params['openid.claimed_id']= $url;
} else {
$params['openid.identity'] = $this->identity;
$params['openid.claimed_id'] = $this->claimed_id;
}
return $this->buildUrl(parse_url($this->server), ['query' => http_build_query($params, '', '&')]);
}
/**
* Returns authentication URL. Usually, you want to redirect your user to it.
* @param string $identifier_select Whether to request OP to select identity for an user in OpenID 2. Does not affect OpenID 1.
* @return string the authentication URL.
* @throws Exception
*/
public function authUrl($identifier_select = null)
{
if (!$this->server) {
$this->discover($this->identity);
}
if ($this->version == 2) {
if ($identifier_select === null) {
return $this->authUrlV2($this->identifier_select);
}
return $this->authUrlV2($identifier_select);
}
return $this->authUrlV1();
}
/**
* Performs OpenID verification with the OP.
* @return boolean whether the verification was successful.
* @throws Exception
*/
public function validate()
{
$this->claimed_id = isset($this->data['openid_claimed_id']) ? $this->data['openid_claimed_id'] : $this->data['openid_identity'];
$params = [
'openid.assoc_handle' => $this->data['openid_assoc_handle'],
'openid.signed' => $this->data['openid_signed'],
'openid.sig' => $this->data['openid_sig'],
];
if (isset($this->data['openid_ns'])) {
# We're dealing with an OpenID 2.0 server, so let's set an ns
# Even though we should know location of the endpoint,
# we still need to verify it by discovery, so $server is not set here
$params['openid.ns'] = 'http://specs.openid.net/auth/2.0';
} elseif (isset($this->data['openid_claimed_id'])
&& $this->data['openid_claimed_id'] != $this->data['openid_identity']
) {
# If it's an OpenID 1 provider, and we've got claimed_id,
# we have to append it to the returnUrl, like authUrl_v1 does.
$this->returnUrl .= (strpos($this->returnUrl, '?') ? '&' : '?')
. 'openid.claimed_id=' . $this->claimed_id;
}
if ($this->data['openid_return_to'] != $this->returnUrl) {
# The return_to url must match the url of current request.
# I'm assuing that noone will set the returnUrl to something that doesn't make sense.
return false;
}
$server = $this->discover($this->claimed_id);
foreach (explode(',', $this->data['openid_signed']) as $item) {
# Checking whether magic_quotes_gpc is turned on, because
# the function may fail if it is. For example, when fetching
# AX namePerson, it might containg an apostrophe, which will be escaped.
# In such case, validation would fail, since we'd send different data than OP
# wants to verify. stripslashes() should solve that problem, but we can't
# use it when magic_quotes is off.
$value = $this->data['openid_' . str_replace('.', '_', $item)];
$params['openid.' . $item] = get_magic_quotes_gpc() ? stripslashes($value) : $value;
}
$params['openid.mode'] = 'check_authentication';
$response = $this->sendRequest($server, 'POST', $params);
return preg_match('/is_valid\s*:\s*true/i', $response);
}
protected function getAxAttributes()
{
$alias = null;
if (isset($this->data['openid_ns_ax']) && $this->data['openid_ns_ax'] != 'http://openid.net/srv/ax/1.0') {
# It's the most likely case, so we'll check it before
$alias = 'ax';
} else {
# 'ax' prefix is either undefined, or points to another extension,
# so we search for another prefix
foreach ($this->data as $key => $value) {
if (substr($key, 0, strlen('openid_ns_')) == 'openid_ns_' && $value == 'http://openid.net/srv/ax/1.0') {
$alias = substr($key, strlen('openid_ns_'));
break;
}
}
}
if (!$alias) {
# An alias for AX schema has not been found,
# so there is no AX data in the OP's response
return [];
}
$attributes = [];
foreach ($this->data as $key => $value) {
$keyMatch = 'openid_' . $alias . '_value_';
if (substr($key, 0, strlen($keyMatch)) != $keyMatch) {
continue;
}
$key = substr($key, strlen($keyMatch));
if (!isset($this->data['openid_' . $alias . '_type_' . $key])) {
# OP is breaking the spec by returning a field without
# associated ns. This shouldn't happen, but it's better
# to check, than cause an E_NOTICE.
continue;
}
$key = substr($this->data['openid_' . $alias . '_type_' . $key], strlen('http://axschema.org/'));
$attributes[$key] = $value;
}
return $attributes;
}
protected function getSregAttributes()
{
$attributes = array();
$sregToAx = array_flip(self::$axToSregMap);
foreach ($this->data as $key => $value) {
$keyMatch = 'openid_sreg_';
if (substr($key, 0, strlen($keyMatch)) != $keyMatch) {
continue;
}
$key = substr($key, strlen($keyMatch));
if (!isset($sregToAx[$key])) {
# The field name isn't part of the SREG spec, so we ignore it.
continue;
}
$attributes[$sregToAx[$key]] = $value;
}
return $attributes;
}
/**
* Gets AX/SREG attributes provided by OP. should be used only after successful validaton.
* Note that it does not guarantee that any of the required/optional parameters will be present,
* or that there will be no other attributes besides those specified.
* In other words. OP may provide whatever information it wants to.
* SREG names will be mapped to AX names.
* @return array array of attributes with keys being the AX schema names, e.g. 'contact/email'
* @see http://www.axschema.org/types/
*/
public function getAttributes()
{
if (isset($this->data['openid_ns']) && $this->data['openid_ns'] == 'http://specs.openid.net/auth/2.0') {
# OpenID 2.0
# We search for both AX and SREG attributes, with AX taking precedence.
return array_merge($this->getSregAttributes(), $this->getAxAttributes());
}
return $this->getSregAttributes();
}
} }
\ No newline at end of file
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