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Remove old MAC output type

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This commit is contained in:
Alex Bilbie 2016-03-15 21:20:46 +00:00
parent 6e74de50e5
commit e946c1e106
1 changed files with 0 additions and 146 deletions
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146
src/ResponseTypes/MAC.php
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@ -1,146 +0,0 @@
<?php
/**
* OAuth 2.0 MAC Token Type.
*
* @author Alex Bilbie <hello@alexbilbie.com>
* @copyright Copyright (c) Alex Bilbie
* @license http://mit-license.org/
*
* @link https://github.com/thephpleague/oauth2-server
*/
namespace League\OAuth2\Server\TokenTypes;
use League\OAuth2\Server\Util\SecureKey;
use Symfony\Component\HttpFoundation\ParameterBag;
use Symfony\Component\HttpFoundation\Request;
/**
* MAC Token Type.
*/
class MAC extends AbstractTokenType implements TokenTypeInterface
{
/**
* {@inheritdoc}
*/
public function generateResponse()
{
$macKey = SecureKey::generate();
$this->server->getMacStorage()->create($macKey, $this->getParam('access_token'));
$response = [
'access_token' => $this->getParam('access_token'),
'token_type' => 'mac',
'expires_in' => $this->getParam('expires_in'),
'mac_key' => $macKey,
'mac_algorithm' => 'hmac-sha-256',
];
return $response;
}
/**
* {@inheritdoc}
*/
public function validateAccessToken(Request $request)
{
if ($request->headers->has('Authorization') === false) {
return;
}
$header = $request->headers->get('Authorization');
if (substr($header, 0, 4) !== 'MAC ') {
return;
}
// Find all the parameters expressed in the header
$paramsRaw = explode(',', substr($header, 4));
$params = new ParameterBag();
array_map(function ($param) use (&$params) {
$param = trim($param);
preg_match_all('/([a-zA-Z]*)="([\w=]*)"/', $param, $matches);
// @codeCoverageIgnoreStart
if (count($matches) !== 3) {
return;
}
// @codeCoverageIgnoreEnd
$key = reset($matches[1]);
$value = trim(reset($matches[2]));
if (empty($value)) {
return;
}
$params->set($key, $value);
}, $paramsRaw);
// Validate parameters
if ($params->has('id') === false || $params->has('ts') === false || $params->has('nonce') === false || $params->has('mac') === false) {
return;
}
if ((int) $params->get('ts') !== time()) {
return;
}
$accessToken = $params->get('id');
$timestamp = (int) $params->get('ts');
$nonce = $params->get('nonce');
$signature = $params->get('mac');
// Try to find the MAC key for the access token
$macKey = $this->server->getMacStorage()->getByAccessToken($accessToken);
if ($macKey === null) {
return;
}
// Calculate and compare the signature
$calculatedSignatureParts = [
$timestamp,
$nonce,
strtoupper($request->getMethod()),
$request->getUri(),
$request->getHost(),
$request->getPort(),
];
if ($params->has('ext')) {
$calculatedSignatureParts[] = $params->get('ext');
}
$calculatedSignature = base64_encode(hash_hmac('sha256', implode("\n", $calculatedSignatureParts), $macKey));
// Return the access token if the signature matches
return ($this->hash_equals($calculatedSignature, $signature)) ? $accessToken : null;
}
/**
* Prevent timing attack.
*
* @param string $knownString
* @param string $userString
*
* @return bool
*/
private function hash_equals($knownString, $userString)
{
if (function_exists('\hash_equals')) {
return \hash_equals($knownString, $userString);
}
if (strlen($knownString) !== strlen($userString)) {
return false;
}
$len = strlen($knownString);
$result = 0;
for ($i = 0; $i < $len; $i++) {
$result |= (ord($knownString[$i]) ^ ord($userString[$i]));
}
// They are only identical strings if $result is exactly 0...
return 0 === $result;
}
}