检查 Restler API 框架上的标头授权

Question

我想扩展 Restler 以检查是否通过了自定义标头授权的有效值。我在解决这个问题时遇到了麻烦，我尝试了这个，但没有机会：

class AuthenticateMe implements iAuthenticate() {

function __isAuthenticated() {
    //return isset($_SERVER['HTTP_AUTH_KEY']) && $_SERVER['HTTP_AUTH_KEY']==AuthenticateMe::KEY ? TRUE : FALSE;
    $headers = apache_request_headers();
    foreach ($headers as $header => $value) {
        if($header == "Authorization") {
            return TRUE;
        } else {
            //return FALSE;
            throw new RestException(404);
        }
    }
}
}

Answer 1

让我快速修复您的自定义身份验证标头示例，

class HeaderAuth implements iAuthenticate{
    function __isAuthenticated(){
        //we are only looking for a custom header called 'Auth'
        //but $_SERVER prepends HTTP_ and makes it all uppercase
        //thats why we need to look for 'HTTP_AUTH' instead
        //also do not use header 'Authorization'. It is not
        //included in PHP's $_SERVER variable
        return isset($_SERVER['HTTP_AUTH']) && $_SERVER['HTTP_AUTH']=='password';
    }
}

我已经对其进行了测试以确保其有效！

以下是如何使其与 Authorization 标头一起工作，它仅适用于 apache 服务器

 class Authorization implements iAuthenticate{
    function __isAuthenticated(){
        $headers =  apache_request_headers();
        return isset($headers['Authorization']) && $headers['Authorization']=='password';
    }
}

我发现 PHP 将 Authorization 标头转换为 $_SERVER['PHP_AUTH_DIGEST'] 或 $_SERVER['PHP_AUTH_USER'] 和 $_SERVER['PHP_AUTH_PW'] 取决于类型auth 请求（摘要或基本），我们可以使用以下 .htaccess 文件来启用 $_SERVER['HTTP_AUTHORIZATION'] 标头

DirectoryIndex index.php

DirectoryIndex index.php
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteRule ^$ index.php [QSA,L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php [QSA,L]
    RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]
</IfModule>

重要部分是 RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]

现在我们的示例可以简化为：

class Authorization implements iAuthenticate{
    function __isAuthenticated(){
        return isset($_SERVER['HTTP_AUTHORIZATION']) && $_SERVER['HTTP_AUTHORIZATION']=='password';
    }
}

Answer 2

标头身份验证

有三种方法可以实现

1. HTTP 基本身份验证
2. HTTP 摘要身份验证
3. 使用自定义 HTTP 标头自行推出

您可以从 PHP 手册

Restler 1.0 有一个摘要式身份验证示例。我进行了修改以使其与 Restler 2.0 一起使用

class DigestAuthentication implements iAuthenticate
{
    public $realm = 'Restricted API';
    public static $user;
    public $restler;


    public function __isAuthenticated()
    {
        //user => password hardcoded for convenience
        $users = array('admin' => 'mypass', 'guest' => 'guest');
        if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
            header('HTTP/1.1 401 Unauthorized');
            header('WWW-Authenticate: Digest realm="'.$this->realm.'",qop="auth",nonce="'.
            uniqid().'",opaque="'.md5($this->realm).'"');
            throw new RestException(401, 'Digest Authentication Required');
        }

        // analyze the PHP_AUTH_DIGEST variable
        if (!($data = DigestAuthentication::http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) ||
        !isset($users[$data['username']]))
        {
            throw new RestException(401, 'Wrong Credentials!');
        }


        // generate the valid response
        $A1 = md5($data['username'] . ':' . $this->realm . ':' . $users[$data['username']]);
        $A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
        $valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

        if ($data['response'] != $valid_response)
        {
            throw new RestException(401, 'Wrong Credentials!');
        }
        // ok, valid username & password
        DigestAuthentication::$user=$data['username'];
        return true;
    }

    /**
     * Logs user out of the digest authentication by bringing the login dialog again
     * ignore the dialog to logout
     *
     * @url GET /user/login
     * @url GET /user/logout
     */
    public function logout()
    {
        header('HTTP/1.1 401 Unauthorized');
        header('WWW-Authenticate: Digest realm="'.$this->realm.'",qop="auth",nonce="'.
        uniqid().'",opaque="'.md5($this->realm).'"');
        die('Digest Authorisation Required');
    }


    // function to parse the http auth header
    private function http_digest_parse($txt)
    {
        // protect against missing data
        $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
        $data = array();
        $keys = implode('|', array_keys($needed_parts));

        preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);

        foreach ($matches as $m) {
            $data[$m[1]] = $m[3] ? $m[3] : $m[4];
            unset($needed_parts[$m[1]]);
        }

        return $needed_parts ? false : $data;
    }
}