/usr/share/php/Auth/HTTP.php is in php-auth-http 2.1.6-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 | <?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Martin Jansen <mj@php.net> |
// | Rui Hirokawa <hirokawa@php.net> |
// | David Costa <gurugeek@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: Auth_HTTP.php,v 1.27 2005/04/04 12:48:33 hirokawa Exp $
//
require_once "Auth/Auth.php";
define('AUTH_HTTP_NONCE_TIME_LEN', 16);
define('AUTH_HTTP_NONCE_HASH_LEN', 32);
// {{{ class Auth_HTTP
/**
* PEAR::Auth_HTTP
*
* The PEAR::Auth_HTTP class provides methods for creating an
* HTTP authentication system based on RFC-2617 using PHP.
*
* Instead of generating an HTML driven form like PEAR::Auth
* does, this class sends header commands to the clients which
* cause them to present a login box like they are e.g. used
* in Apache's .htaccess mechanism.
*
* This class requires the PEAR::Auth package.
*
* @notes The HTTP Digest Authentication part is based on
* authentication class written by Tom Pike <tom.pike@xiven.com>
*
* @author Martin Jansen <mj@php.net>
* @author Rui Hirokawa <hirokawa@php.net>
* @author David Costa <gurugeek@php.net>
* @package Auth_HTTP
* @extends Auth
* @version $Revision: 1.27 $
*/
class Auth_HTTP extends Auth
{
// {{{ properties
/**
* Authorization method: 'basic' or 'digest'
*
* @access public
* @var string
*/
var $authType = 'basic';
/**
* Name of the realm for Basic Authentication
*
* @access public
* @var string
* @see drawLogin()
*/
var $realm = "protected area";
/**
* Text to send if user hits cancel button
*
* @access public
* @var string
* @see drawLogin()
*/
var $CancelText = "Error 401 - Access denied";
/**
* option array
*
* @access public
* @var array
*/
var $options = array();
/**
* flag to indicate the nonce was stale.
*
* @access public
* @var bool
*/
var $stale = false;
/**
* opaque string for digest authentication
*
* @access public
* @var string
*/
var $opaque = 'dummy';
/**
* digest URI
*
* @access public
* @var string
*/
var $uri = '';
/**
* authorization info returned by the client
*
* @access public
* @var array
*/
var $auth = array();
/**
* next nonce value
*
* @access public
* @var string
*/
var $nextNonce = '';
/**
* nonce value
*
* @access public
* @var string
*/
var $nonce = '';
/**
* Holds a reference to the global server variable
* @var array
*/
var $server;
/**
* Holds a reference to the global post variable
* @var array
*/
var $post;
/**
* Holds a reference to the global cookie variable
* @var array
*/
var $cookie;
// }}}
// {{{ Constructor
/**
* Constructor
*
* @param string Type of the storage driver
* @param mixed Additional options for the storage driver
* (example: if you are using DB as the storage
* driver, you have to pass the dsn string here)
*
* @return void
*/
function Auth_HTTP($storageDriver, $options = '')
{
/* set default values for options */
$this->options = array('cryptType' => 'md5',
'algorithm' => 'MD5',
'qop' => 'auth-int,auth',
'opaquekey' => 'moo',
'noncekey' => 'moo',
'digestRealm' => 'protected area',
'forceDigestOnly' => false,
'nonceLife' => 300,
'sessionSharing' => true,
);
if (!empty($options['authType'])) {
$this->authType = strtolower($options['authType']);
}
if (is_array($options)) {
foreach($options as $key => $value) {
if (array_key_exists( $key, $this->options)) {
$this->options[$key] = $value;
}
}
if (!empty($this->options['opaquekey'])) {
$this->opaque = md5($this->options['opaquekey']);
}
}
$this->Auth($storageDriver, $options);
}
// }}}
// {{{ assignData()
/**
* Assign values from $PHP_AUTH_USER and $PHP_AUTH_PW or 'Authorization' header
* to internal variables and sets the session id based
* on them
*
* @access public
* @return void
*/
function assignData()
{
if (method_exists($this, '_importGlobalVariable')) {
$this->server = &$this->_importGlobalVariable('server');
}
if ($this->authType == 'basic') {
if (!empty($this->server['PHP_AUTH_USER'])) {
$this->username = $this->server['PHP_AUTH_USER'];
}
if (!empty($this->server['PHP_AUTH_PW'])) {
$this->password = $this->server['PHP_AUTH_PW'];
}
/**
* Try to get authentication information from IIS
*/
if (empty($this->username) && empty($this->password)) {
if (!empty($this->server['HTTP_AUTHORIZATION'])) {
list($this->username, $this->password) =
explode(':', base64_decode(substr($this->server['HTTP_AUTHORIZATION'], 6)));
}
}
} elseif ($this->authType == 'digest') {
$this->username = '';
$this->password = '';
$this->digest_header = null;
if (!empty($this->server['PHP_AUTH_DIGEST'])) {
$this->digest_header = substr($this->server['PHP_AUTH_DIGEST'],
strpos($this->server['PHP_AUTH_DIGEST'],' ')+1);
} else {
$headers = getallheaders();
if(isset($headers['Authorization']) && !empty($headers['Authorization'])) {
$this->digest_header = substr($headers['Authorization'],
strpos($headers['Authorization'],' ')+1);
}
}
if($this->digest_header) {
$authtemp = explode(',', $this->digest_header);
$auth = array();
foreach($authtemp as $key => $value) {
$value = trim($value);
if(strpos($value,'=') !== false) {
$lhs = substr($value,0,strpos($value,'='));
$rhs = substr($value,strpos($value,'=')+1);
if(substr($rhs,0,1) == '"' && substr($rhs,-1,1) == '"') {
$rhs = substr($rhs,1,-1);
}
$auth[$lhs] = $rhs;
}
}
}
if (!isset($auth['uri']) || !isset($auth['realm'])) {
return;
}
if ($this->selfURI() == $auth['uri']) {
$this->uri = $auth['uri'];
if (substr($headers['Authorization'],0,7) == 'Digest ') {
$this->authType = 'digest';
if (!isset($auth['nonce']) || !isset($auth['username']) ||
!isset($auth['response']) || !isset($auth['qop']) ||
!isset($auth['nc']) || !isset($auth['cnonce'])){
return;
}
if ($auth['qop'] != 'auth' && $auth['qop'] != 'auth-int') {
return;
}
$this->stale = $this->_judgeStale($auth['nonce']);
if ($this->nextNonce == false) {
return;
}
$this->username = $auth['username'];
$this->password = $auth['response'];
$this->auth['nonce'] = $auth['nonce'];
$this->auth['qop'] = $auth['qop'];
$this->auth['nc'] = $auth['nc'];
$this->auth['cnonce'] = $auth['cnonce'];
if (isset($auth['opaque'])) {
$this->auth['opaque'] = $auth['opaque'];
}
} elseif (substr($headers['Authorization'],0,6) == 'Basic ') {
if ($this->options['forceDigestOnly']) {
return; // Basic authentication is not allowed.
}
$this->authType = 'basic';
list($username, $password) =
explode(':',base64_decode(substr($headers['Authorization'],6)));
$this->username = $username;
$this->password = $password;
}
}
} else {
return PEAR::raiseError('authType is invalid.');
}
if ($this->options['sessionSharing'] &&
isset($this->username) && isset($this->password)) {
session_id(md5('Auth_HTTP' . $this->username . $this->password));
}
/**
* set sessionName for AUTH, so that the sessionName is different
* for distinct realms
*/
$this->_sessionName = "_authhttp".md5($this->realm);
}
// }}}
// {{{ login()
/**
* Login function
*
* @access private
* @return void
*/
function login()
{
$login_ok = false;
if (method_exists($this, '_loadStorage')) {
$this->_loadStorage();
}
$this->storage->_auth_obj->_sessionName =& $this->_sessionName;
/**
* When the user has already entered a username,
* we have to validate it.
*/
if (!empty($this->username) && !empty($this->password)) {
if ($this->authType == 'basic' && !$this->options['forceDigestOnly']) {
if (true === $this->storage->fetchData($this->username, $this->password)) {
$login_ok = true;
}
} else { /* digest authentication */
if (!$this->getAuth() || $this->getAuthData('a1') == null) {
/*
* note:
* - only PEAR::DB is supported as container.
* - password should be stored in container as plain-text
* (if $options['cryptType'] == 'none') or
* A1 hashed form (md5('username:realm:password'))
* (if $options['cryptType'] == 'md5')
*/
$dbs = $this->storage;
if (!DB::isConnection($dbs->db)) {
$dbs->_connect($dbs->options['dsn']);
}
$query = 'SELECT '.$dbs->options['passwordcol']." FROM ".$dbs->options['table'].
' WHERE '.$dbs->options['usernamecol']." = '".
$dbs->db->quoteString($this->username)."' ";
$pwd = $dbs->db->getOne($query); // password stored in container.
if (DB::isError($pwd)) {
return PEAR::raiseError($pwd->getMessage(), $pwd->getCode());
}
if ($this->options['cryptType'] == 'none') {
$a1 = md5($this->username.':'.$this->options['digestRealm'].':'.$pwd);
} else {
$a1 = $pwd;
}
$this->setAuthData('a1', $a1, true);
} else {
$a1 = $this->getAuthData('a1');
}
$login_ok = $this->validateDigest($this->password, $a1);
if ($this->nextNonce == false) {
$login_ok = false;
}
}
if (!$login_ok && is_callable($this->loginFailedCallback)) {
call_user_func($this->loginFailedCallback,$this->username, $this);
}
}
if (!empty($this->username) && $login_ok) {
$this->setAuth($this->username);
if (is_callable($this->loginCallback)) {
call_user_func($this->loginCallback,$this->username, $this);
}
}
/**
* If the login failed or the user entered no username,
* output the login screen again.
*/
if (!empty($this->username) && !$login_ok) {
$this->status = AUTH_WRONG_LOGIN;
}
if ((empty($this->username) || !$login_ok) && $this->showLogin) {
$this->drawLogin($this->storage->activeUser);
return;
}
if (!empty($this->username) && $login_ok && $this->authType == 'digest'
&& $this->auth['qop'] == 'auth') {
$this->authenticationInfo();
}
}
// }}}
// {{{ drawLogin()
/**
* Launch the login box
*
* @param string $username Username
* @return void
* @access private
*/
function drawLogin($username = "")
{
/**
* Send the header commands
*/
if ($this->authType == 'basic') {
header("WWW-Authenticate: Basic realm=\"".$this->realm."\"");
header('HTTP/1.0 401 Unauthorized');
} else if ($this->authType == 'digest') {
$this->nonce = $this->_getNonce();
$wwwauth = 'WWW-Authenticate: Digest ';
$wwwauth .= 'qop="'.$this->options['qop'].'", ';
$wwwauth .= 'algorithm='.$this->options['algorithm'].', ';
$wwwauth .= 'realm="'.$this->options['digestRealm'].'", ';
$wwwauth .= 'nonce="'.$this->nonce.'", ';
if ($this->stale) {
$wwwauth .= 'stale=true, ';
}
if (!empty($this->opaque)) {
$wwwauth .= 'opaque="'.$this->opaque.'"' ;
}
$wwwauth .= "\r\n";
if (!$this->options['forceDigestOnly']) {
$wwwauth .= 'WWW-Authenticate: Basic realm="'.$this->realm.'"';
}
header($wwwauth);
header('HTTP/1.0 401 Unauthorized');
}
/**
* This code is only executed if the user hits the cancel
* button or if he enters wrong data 3 times.
*/
if ($this->stale) {
echo 'Stale nonce value, please re-authenticate.';
} else {
echo $this->CancelText;
}
exit;
}
// }}}
// {{{ setRealm()
/**
* Set name of the current realm
*
* @access public
* @param string $realm Name of the realm
* @param string $digestRealm Name of the realm for digest authentication
* @return void
*/
function setRealm($realm, $digestRealm = '')
{
$this->realm = $realm;
if (!empty($digestRealm)) {
$this->options['digestRealm'] = $digestRealm;
}
}
// }}}
// {{{ setCancelText()
/**
* Set the text to send if user hits the cancel button
*
* @access public
* @param string $text Text to send
* @return void
*/
function setCancelText($text)
{
$this->CancelText = $text;
}
// }}}
// {{{ validateDigest()
/**
* judge if the client response is valid.
*
* @access private
* @param string $response client response
* @param string $a1 password or hashed password stored in container
* @return bool true if success, false otherwise
*/
function validateDigest($response, $a1)
{
if (method_exists($this, '_importGlobalVariable')) {
$this->server = &$this->_importGlobalVariable('server');
}
$a2unhashed = $this->server['REQUEST_METHOD'].":".$this->selfURI();
if($this->auth['qop'] == 'auth-int') {
if(isset($GLOBALS["HTTP_RAW_POST_DATA"])) {
// In PHP < 4.3 get raw POST data from this variable
$body = $GLOBALS["HTTP_RAW_POST_DATA"];
} else if($lines = @file('php://input')) {
// In PHP >= 4.3 get raw POST data from this file
$body = implode("\n", $lines);
} else {
if (method_exists($this, '_importGlobalVariable')) {
$this->post = &$this->_importGlobalVariable('post');
}
$body = '';
foreach($this->post as $key => $value) {
if($body != '') $body .= '&';
$body .= rawurlencode($key) . '=' . rawurlencode($value);
}
}
$a2unhashed .= ':'.md5($body);
}
$a2 = md5($a2unhashed);
$combined = $a1.':'.
$this->auth['nonce'].':'.
$this->auth['nc'].':'.
$this->auth['cnonce'].':'.
$this->auth['qop'].':'.
$a2;
$expectedResponse = md5($combined);
if(!isset($this->auth['opaque']) || $this->auth['opaque'] == $this->opaque) {
if($response == $expectedResponse) { // password is valid
if(!$this->stale) {
return true;
} else {
$this->drawLogin();
}
}
}
return false;
}
// }}}
// {{{ _judgeStale()
/**
* judge if nonce from client is stale.
*
* @access private
* @param string $nonce nonce value from client
* @return bool stale
*/
function _judgeStale($nonce)
{
$stale = false;
if(!$this->_decodeNonce($nonce, $time, $hash_cli)) {
$this->nextNonce = false;
$stale = true;
return $stale;
}
if ($time < time() - $this->options['nonceLife']) {
$this->nextNonce = $this->_getNonce();
$stale = true;
} else {
$this->nextNonce = $nonce;
}
return $stale;
}
// }}}
// {{{ _nonceDecode()
/**
* decode nonce string
*
* @access private
* @param string $nonce nonce value from client
* @param string $time decoded time
* @param string $hash decoded hash
* @return bool false if nonce is invalid
*/
function _decodeNonce($nonce, &$time, &$hash)
{
if (method_exists($this, '_importGlobalVariable')) {
$this->server = &$this->_importGlobalVariable('server');
}
if (strlen($nonce) != AUTH_HTTP_NONCE_TIME_LEN + AUTH_HTTP_NONCE_HASH_LEN) {
return false;
}
$time = base64_decode(substr($nonce, 0, AUTH_HTTP_NONCE_TIME_LEN));
$hash_cli = substr($nonce, AUTH_HTTP_NONCE_TIME_LEN, AUTH_HTTP_NONCE_HASH_LEN);
$hash = md5($time . $this->server['HTTP_USER_AGENT'] . $this->options['noncekey']);
if ($hash_cli != $hash) {
return false;
}
return true;
}
// }}}
// {{{ _getNonce()
/**
* return nonce to detect timeout
*
* @access private
* @return string nonce value
*/
function _getNonce()
{
if (method_exists($this, '_importGlobalVariable')) {
$this->server = &$this->_importGlobalVariable('server');
}
$time = time();
$hash = md5($time . $this->server['HTTP_USER_AGENT'] . $this->options['noncekey']);
return base64_encode($time) . $hash;
}
// }}}
// {{{ authenticationInfo()
/**
* output HTTP Authentication-Info header
*
* @notes md5 hash of contents is required if 'qop' is 'auth-int'
*
* @access private
* @param string MD5 hash of content
*/
function authenticationInfo($contentMD5 = '') {
if($this->getAuth() && ($this->getAuthData('a1') != null)) {
$a1 = $this->getAuthData('a1');
// Work out authorisation response
$a2unhashed = ":".$this->selfURI();
if($this->auth['qop'] == 'auth-int') {
$a2unhashed .= ':'.$contentMD5;
}
$a2 = md5($a2unhashed);
$combined = $a1.':'.
$this->nonce.':'.
$this->auth['nc'].':'.
$this->auth['cnonce'].':'.
$this->auth['qop'].':'.
$a2;
// Send authentication info
$wwwauth = 'Authentication-Info: ';
if($this->nonce != $this->nextNonce) {
$wwwauth .= 'nextnonce="'.$this->nextNonce.'", ';
}
$wwwauth .= 'qop='.$this->auth['qop'].', ';
$wwwauth .= 'rspauth="'.md5($combined).'", ';
$wwwauth .= 'cnonce="'.$this->auth['cnonce'].'", ';
$wwwauth .= 'nc='.$this->auth['nc'].'';
header($wwwauth);
}
}
// }}}
// {{{ setOption()
/**
* set authentication option
*
* @access public
* @param mixed $name key of option
* @param mixed $value value of option
* @return void
*/
function setOption($name, $value = null)
{
if (is_array($name)) {
foreach($name as $key => $value) {
if (array_key_exists( $key, $this->options)) {
$this->options[$key] = $value;
}
}
} else {
if (array_key_exists( $name, $this->options)) {
$this->options[$name] = $value;
}
}
}
// }}}
// {{{ getOption()
/**
* get authentication option
*
* @access public
* @param string $name key of option
* @return mixed option value
*/
function getOption($name)
{
if (array_key_exists( $name, $this->options)) {
return $this->options[$name];
}
if ($name == 'CancelText') {
return $this->CancelText;
}
if ($name == 'Realm') {
return $this->realm;
}
return false;
}
// }}}
// {{{ selfURI()
/**
* get self URI
*
* @access public
* @return string self URI
*/
function selfURI()
{
if (method_exists($this, '_importGlobalVariable')) {
$this->server = &$this->_importGlobalVariable('server');
}
if (preg_match("/MSIE/",$this->server['HTTP_USER_AGENT'])) {
// query string should be removed for MSIE
$uri = preg_replace("/^(.*)\?/","\\1",$this->server['REQUEST_URI']);
} else {
$uri = $this->server['REQUEST_URI'];
}
return $uri;
}
// }}}
}
// }}}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>
|