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<?php namespace Myth\Api\Auth; |
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/** |
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* Sprint |
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* |
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* A set of power tools to enhance the CodeIgniter framework and provide consistent workflow. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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* |
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* @package Sprint |
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* @author Lonnie Ezell |
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* @copyright Copyright 2014-2015, New Myth Media, LLC (http://newmythmedia.com) |
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* @license http://opensource.org/licenses/MIT (MIT) |
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* @link http://sprintphp.com |
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* @since Version 1.0 |
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*/ |
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use Myth\Auth\LocalAuthentication; |
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use Myth\Events; |
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/** |
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* Class APIAuthentication |
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* |
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* @package Myth\Api\Auth |
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*/ |
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class APIAuthentication extends LocalAuthentication { |
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protected $logged_in = false; |
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protected $realm = 'WallyWorld'; |
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protected $email = null; |
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//-------------------------------------------------------------------- |
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public function __construct($ci=null) |
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{ |
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parent::__construct($ci); |
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$this->ci->config->load('api'); |
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$this->ci->lang->load('api'); |
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// Has the IP address been blacklisted? |
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if (config_item('auth.ip_blacklist_enabled')) |
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{ |
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$this->checkIPBlacklist(); |
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} |
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// Do we need to do whitelisting? |
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if (config_item('auth.ip_whitelist_enabled')) |
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{ |
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$this->checkIPWhitelist(); |
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} |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Sets the realm used by the authentication. The system truly only |
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* supports a single realm across the entire application, but this |
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* allows it to be set by the controller. |
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* |
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* @param $realm |
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* |
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* @return $this |
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*/ |
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public function setRealm($realm) |
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{ |
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$this->realm = $realm; |
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return $this; |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Checks to see if someone is authorized via HTTP Basic Authentication. |
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* |
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* @return bool |
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*/ |
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public function tryBasicAuthentication() |
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{ |
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$username = null; |
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$password = null; |
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// mod_php |
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if ($this->ci->input->server('PHP_AUTH_USER')) { |
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$username = $this->ci->input->server('PHP_AUTH_USER'); |
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$password = $this->ci->input->server('PHP_AUTH_PW'); |
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} |
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// most other servers |
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elseif ($this->ci->input->server('HTTP_AUTHENTICATION')) { |
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if (strpos(strtolower($this->ci->input->server('HTTP_AUTHENTICATION')), 'basic') === 0) { |
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list($username, $password) = explode(':', base64_decode(substr($this->ci->input->server('HTTP_AUTHORIZATION'), 6))); |
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} |
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} |
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// If credentials weren't provided, we can't do anything |
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// so request authorization by the client. |
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if (empty($username) || empty($password)) |
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{ |
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$this->ci->output->set_header('WWW-Authenticate: Basic realm="'. config_item('api.realm') .'"'); |
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return false; |
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} |
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$data = [ |
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config_item('api.auth_field') => $username, |
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'password' => $password |
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]; |
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// Set email for later throttling check |
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if (config_item('api.auth_field') === 'email') |
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{ |
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$this->email = $username; |
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} |
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$user = $this->validate($data, true); |
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$this->user = $user; |
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return $user; |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Checks to see if someone is authorized via HTTP Digest Authentication. |
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* |
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* NOTE: This requires that a new field, 'digest_key', be added to the user's |
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* table and, during new user creation, or password reset, that the digest_key |
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* be calculated as md5({username}:{realm}:{password}) |
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* |
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* References: |
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* - http://www.faqs.org/rfcs/rfc2617.html |
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* - http://www.sitepoint.com/understanding-http-digest-access-authentication/ |
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*/ |
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public function tryDigestAuthentication() |
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{ |
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$digest_string = ''; |
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// We need to test which server authentication variable to use |
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// because the PHP ISAPI module in IIS acts different from CGI |
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if ($this->ci->input->server('PHP_AUTH_DIGEST')) |
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{ |
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$digest_string = $this->ci->input->server('PHP_AUTH_DIGEST'); |
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} |
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elseif ($this->ci->input->server('HTTP_AUTHORIZATION')) |
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{ |
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$digest_string = $this->ci->input->server('HTTP_AUTHORIZATION'); |
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} |
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$nonce = md5(uniqid()); |
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$opaque = md5(uniqid()); |
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// No digest string? Then you're done. Go home. |
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if (empty($digest_string)) |
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{ |
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$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) ); |
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return false; |
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} |
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// Grab the parts from the digest string. |
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// They will be provided as an array of the parts: username, nonce, uri, nc, cnonce, qop, response |
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$matches = []; |
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preg_match_all('@(username|nonce|uri|nc|cnonce|qop|response)=[\'"]?([^\'",]+)@', $digest_string, $matches); |
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$digest = (empty($matches[1]) || empty($matches[2])) ? array() : array_combine($matches[1], $matches[2]); |
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View Code Duplication |
if (! array_key_exists('username', $digest)) |
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{ |
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$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) ); |
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return false; |
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} |
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// Set email for later throttling check |
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if (config_item('api.auth_field') === 'email') |
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{ |
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$this->email = $digest['username']; |
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} |
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// Grab the user that corresponds to that "username" |
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// exact field determined in the api config file - api.auth_field setting. |
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$user = $this->user_model->as_array()->find_by( config_item('api.auth_field'), $digest['username'] ); |
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if (! $user) |
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{ |
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$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) ); |
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return false; |
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} |
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// Calc the correct response |
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$A1 = $user['digest_key']; |
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if ($digest['qop'] == 'auth') |
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{ |
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$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] ); |
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} else { |
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$body = file_get_contents('php://input'); |
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$A2 = md5( strtoupper( $_SERVER['REQUEST_METHOD'] ) .':'. $digest['uri'] .':'. md5($body) ); |
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} |
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$valid_response = md5($A1 .':'. $digest['nonce'].':'. $digest['nc'] .':'. $digest['cnonce'] .':'. $digest['qop'] .':'. $A2); |
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View Code Duplication |
if ($digest['response'] != $valid_response) |
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{ |
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$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) ); |
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return false; |
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} |
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$this->user = $user; |
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return $user; |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Attempts to log a user into the API via the configured 'api.auth_type' |
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* config variable in config/api.php. |
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* |
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* NOTE: Since this is intended for API use, it is a STATELESS implementation |
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* and does not support remember me functionality. |
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* |
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* This basically replaces the login() method due to the way the AuthTrait |
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* works. |
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* |
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* @return bool |
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*/ |
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public function viaRemember() |
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{ |
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$user = false; |
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switch (config_item('api.auth_type')) |
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{ |
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case 'basic': |
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$user = $this->tryBasicAuthentication(); |
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break; |
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case 'digest': |
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$user = $this->tryDigestAuthentication(); |
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break; |
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} |
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// If the user is throttled due to too many invalid logins |
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// or the system is under attack, kick them back. |
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// We need to test for this after validation because we |
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// don't want it to affect a valid login. |
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if ($this->email) |
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{ |
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// If throttling time is above zero, we can't allow |
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// logins now. |
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if ($time = (int)$this->isThrottled($this->email) > 0) |
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{ |
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$this->error = sprintf(lang('api.throttled'), $time); |
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return false; |
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} |
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$this->email = null; |
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} |
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if (! $user) |
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{ |
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$this->user = null; |
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return $user; |
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} |
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$this->loginUser($user); |
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Events::trigger('didLogin', [$user]); |
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return true; |
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} |
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//-------------------------------------------------------------------- |
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//-------------------------------------------------------------------- |
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// Protected Methods |
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//-------------------------------------------------------------------- |
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/** |
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* Checks the client's IP address against any IP addresses specified |
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* in the api config file. If any are found, the client is refused |
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* access immediately. |
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*/ |
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View Code Duplication |
public function checkIPBlacklist() |
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{ |
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$blacklist = explode(',', config_item('api.ip_blacklist')); |
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array_walk($blacklist, function (&$item, $key) { |
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$item = trim($item); |
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}); |
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if (in_array($this->ci->input->ip_address(), $blacklist)) |
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{ |
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throw new \Exception( lang('api.ip_denied'), 401); |
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} |
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return true; |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Checks the client's IP address against any IP addresses specified |
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* in the api config file. If the client is not accessing the site |
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* from one of those addresses then their access is denied. |
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*/ |
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View Code Duplication |
public function checkIPWhitelist() |
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{ |
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$whitelist = explode(',', config_item('api.ip_whitelist')); |
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array_push($whitelist, '127.0.0.1', '0.0.0.0'); |
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array_walk($whitelist, function (&$item, $key) { |
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$item = trim($item); |
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}); |
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if (! in_array($this->ci->input->ip_address(), $whitelist)) |
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{ |
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throw new \Exception( lang('api.ip_denied'), 401); |
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} |
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return true; |
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} |
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//-------------------------------------------------------------------- |
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/** |
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* Handles the nitty gritty of actually logging our user into the system. |
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* Does NOT perform the authentication, just sets the system up so that |
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* it knows we're here. |
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* |
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* @param $user |
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*/ |
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protected function loginUser($user) |
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{ |
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// Save the user for later access |
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$this->user = $user; |
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// Clear our login attempts |
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$this->ci->login_model->purgeLoginAttempts($user['email']); |
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// We'll give a 20% chance to need to do a purge since we |
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// don't need to purge THAT often, it's just a maintenance issue. |
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// to keep the table from getting out of control. |
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if (mt_rand(1, 100) < 20) |
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{ |
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$this->ci->login_model->purgeOldRememberTokens(); |
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} |
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} |
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//-------------------------------------------------------------------- |
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//-------------------------------------------------------------------- |
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|
|
// UNUSED METHOD OVERRIDES |
368
|
|
|
//-------------------------------------------------------------------- |
369
|
|
|
|
370
|
|
|
/** |
371
|
|
|
* Attempt to log a user into the system. |
372
|
|
|
* |
373
|
|
|
* $credentials is an array of key/value pairs needed to log the user in. |
374
|
|
|
* This is often email/password, or username/password. |
375
|
|
|
* |
376
|
|
|
* NOTE: Since this is intended for API use, it is a STATELESS implementation |
377
|
|
|
* and does not support remember me functionality. |
378
|
|
|
* |
379
|
|
|
* Valid credentials: |
380
|
|
|
* - username |
381
|
|
|
* - email |
382
|
|
|
* - realm |
383
|
|
|
* |
384
|
|
|
* @param $credentials |
385
|
|
|
* @param bool $remember |
386
|
|
|
* |
387
|
|
|
* @return bool|mixed|void |
388
|
|
|
*/ |
389
|
|
|
public function login($credentials, $remember=false) |
390
|
|
|
{ |
391
|
|
|
throw new \BadMethodCallException( lang('api.unused_method') ); |
392
|
|
|
} |
393
|
|
|
|
394
|
|
|
//-------------------------------------------------------------------- |
395
|
|
|
|
396
|
|
|
/** |
397
|
|
|
* Logs a user out and removes all session information. |
398
|
|
|
* |
399
|
|
|
* NOTE: Since this is intended for API use, it is a STATELESS implementation |
400
|
|
|
* and does not support remember me functionality. |
401
|
|
|
* |
402
|
|
|
* @return mixed |
403
|
|
|
*/ |
404
|
|
|
public function logout() |
405
|
|
|
{ |
406
|
|
|
throw new \BadMethodCallException( lang('api.unused_method') ); |
407
|
|
|
} |
408
|
|
|
|
409
|
|
|
//-------------------------------------------------------------------- |
410
|
|
|
|
411
|
|
|
/** |
412
|
|
|
* Checks whether a user is logged in or not. |
413
|
|
|
* |
414
|
|
|
* @return bool |
415
|
|
|
*/ |
416
|
|
|
public function isLoggedIn() |
417
|
|
|
{ |
418
|
|
|
return $this->logged_in; |
419
|
|
|
} |
420
|
|
|
|
421
|
|
|
//-------------------------------------------------------------------- |
422
|
|
|
|
423
|
|
|
} |
424
|
|
|
|