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- <?php
- // +----------------------------------------------------------------------+
- // | PEAR :: File :: Passwd :: Unix |
- // +----------------------------------------------------------------------+
- // | This source file is subject to version 3.0 of the PHP license, |
- // | that is available at http://www.php.net/license/3_0.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. |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 2003-2004 Michael Wallner <mike@iworks.at> |
- // +----------------------------------------------------------------------+
- //
- // $Id: Unix.php,v 1.15 2004/06/07 19:19:47 mike Exp $
-
- /**
- * Manipulate standard Unix passwd files.
- *
- * @author Michael Wallner <mike@php.net>
- * @package File_Passwd
- */
-
- /**
- * Requires File::Passwd::Common
- */
- require_once 'File/Passwd/Common.php';
-
- /**
- * Manipulate standard Unix passwd files.
- *
- * <kbd><u>Usage Example:</u></kbd>
- * <code>
- * $passwd = &File_Passwd::factory('Unix');
- * $passwd->setFile('/my/passwd/file');
- * $passwd->load();
- * $passwd->addUser('mike', 'secret');
- * $passwd->save();
- * </code>
- *
- *
- * <kbd><u>Output of listUser()</u></kbd>
- * # using the 'name map':
- * <pre>
- * array
- * + user => array
- * + pass => crypted_passwd or 'x' if shadowed
- * + uid => user id
- * + gid => group id
- * + gecos => comments
- * + home => home directory
- * + shell => standard shell
- * </pre>
- * # without 'name map':
- * <pre>
- * array
- * + user => array
- * + 0 => crypted_passwd
- * + 1 => ...
- * + 2 => ...
- * </pre>
- *
- * @author Michael Wallner <mike@php.net>
- * @package File_Passwd
- * @version $Revision: 1.15 $
- * @access public
- */
- class File_Passwd_Unix extends File_Passwd_Common
- {
- /**
- * A 'name map' wich refer to the extra properties
- *
- * @var array
- * @access private
- */
- var $_map = array('uid', 'gid', 'gecos', 'home', 'shell');
-
- /**
- * Whether to use the 'name map' or not
- *
- * @var boolean
- * @access private
- */
- var $_usemap = true;
-
- /**
- * Whether the passwords of this passwd file are shadowed in another file
- *
- * @var boolean
- * @access private
- */
- var $_shadowed = false;
-
- /**
- * Encryption mode, either md5 or des
- *
- * @var string
- * @access private
- */
- var $_mode = 'des';
-
- /**
- * Supported encryption modes
- *
- * @var array
- * @access private
- */
- var $_modes = array('md5' => 'md5', 'des' => 'des');
-
- /**
- * Constructor
- *
- * @access public
- * @param string $file path to passwd file
- */
- function File_Passwd_Unix($file = 'passwd')
- {
- parent::__construct($file);
- }
-
- /**
- * Fast authentication of a certain user
- *
- * Returns a PEAR_Error if:
- * o file doesn't exist
- * o file couldn't be opened in read mode
- * o file couldn't be locked exclusively
- * o file couldn't be unlocked (only if auth fails)
- * o file couldn't be closed (only if auth fails)
- * o invalid encryption mode <var>$mode</var> was provided
- *
- * @static call this method statically for a reasonable fast authentication
- * @access public
- * @return mixed true if authenticated, false if not or PEAR_Error
- * @param string $file path to passwd file
- * @param string $user user to authenticate
- * @param string $pass plaintext password
- * @param string $mode encryption mode to use (des or md5)
- */
- function staticAuth($file, $user, $pass, $mode)
- {
- $line = File_Passwd_Common::_auth($file, $user);
- if (!$line || PEAR::isError($line)) {
- return $line;
- }
- list(,$real)= explode(':', $line);
- $crypted = File_Passwd_Unix::_genPass($pass, $real, $mode);
- if (PEAR::isError($crypted)) {
- return $crypted;
- }
- return ($crypted === $real);
- }
-
- /**
- * Apply changes an rewrite passwd file
- *
- * Returns a PEAR_Error if:
- * o directory in which the file should reside couldn't be created
- * o file couldn't be opened in write mode
- * o file couldn't be locked exclusively
- * o file couldn't be unlocked
- * o file couldn't be closed
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- */
- function save()
- {
- $content = '';
- foreach ($this->_users as $user => $array){
- $pass = array_shift($array);
- $extra = implode(':', $array);
- $content .= $user . ':' . $pass;
- if (!empty($extra)) {
- $content .= ':' . $extra;
- }
- $content .= "\n";
- }
- return $this->_save($content);
- }
-
- /**
- * Parse the Unix password file
- *
- * Returns a PEAR_Error if passwd file has invalid format.
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- */
- function parse()
- {
- $this->_users = array();
- foreach ($this->_contents as $line){
- $parts = explode(':', $line);
- if (count($parts) < 2) {
- return PEAR::raiseError(
- FILE_PASSWD_E_INVALID_FORMAT_STR,
- FILE_PASSWD_E_INVALID_FORMAT
- );
- }
- $user = array_shift($parts);
- $pass = array_shift($parts);
- if ($pass == 'x') {
- $this->_shadowed = true;
- }
- $values = array();
- if ($this->_usemap) {
- $values['pass'] = $pass;
- foreach ($parts as $i => $value){
- if (isset($this->_map[$i])) {
- $values[$this->_map[$i]] = $value;
- } else {
- $values[$i+1] = $value;
- }
- }
- } else {
- $values = array_merge(array($pass), $parts);
- }
- $this->_users[$user] = $values;
-
- }
- $this->_contents = array();
- return true;
- }
-
- /**
- * Set the encryption mode
- *
- * Supported encryption modes are des and md5.
- *
- * Returns a PEAR_Error if supplied encryption mode is not supported.
- *
- * @see setMode()
- * @see listModes()
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on succes or PEAR_Error
- * @param string $mode encryption mode to use; either md5 or des
- */
- function setMode($mode)
- {
- $mode = strToLower($mode);
- if (!isset($this->_modes[$mode])) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_ENC_MODE_STR, $mode),
- FILE_PASSWD_E_INVALID_ENC_MODE
- );
- }
- $this->_mode = $mode;
- return true;
- }
-
- /**
- * Get supported encryption modes
- *
- * <pre>
- * array
- * + md5
- * + des
- * </pre>
- *
- * @see setMode()
- * @see getMode()
- *
- * @access public
- * @return array
- */
- function listModes()
- {
- return $this->_modes;
- }
-
- /**
- * Get actual encryption mode
- *
- * @see listModes()
- * @see setMode()
- *
- * @access public
- * @return string
- */
- function getMode()
- {
- return $this->_mode;
- }
-
- /**
- * Whether to use the 'name map' of the extra properties or not
- *
- * Default Unix passwd files look like:
- * <pre>
- * user:password:user_id:group_id:gecos:home_dir:shell
- * </pre>
- *
- * The default 'name map' for properties except user and password looks like:
- * o uid
- * o gid
- * o gecos
- * o home
- * o shell
- *
- * If you want to change the naming of the standard map use
- * File_Passwd_Unix::setMap(array()).
- *
- * @see setMap()
- * @see getMap()
- *
- * @access public
- * @return boolean always true if you set a value (true/false) OR
- * the actual value if called without param
- *
- * @param boolean $bool whether to use the 'name map' or not
- */
- function useMap($bool = null)
- {
- if (is_null($bool)) {
- return $this->_usemap;
- }
- $this->_usemap = (bool) $bool;
- return true;
- }
-
- /**
- * Set the 'name map' to use with the extra properties of the user
- *
- * This map is used for naming the associative array of the extra properties.
- *
- * Returns a PEAR_Error if <var>$map</var> was not of type array.
- *
- * @see getMap()
- * @see useMap()
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- */
- function setMap($map = array())
- {
- if (!is_array($map)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_PARAM_MUST_BE_ARRAY_STR, '$map'),
- FILE_PASSWD_E_PARAM_MUST_BE_ARRAY
- );
- }
- $this->_map = $map;
- return true;
- }
-
- /**
- * Get the 'name map' which is used for the extra properties of the user
- *
- * @see setMap()
- * @see useMap()
- *
- * @access public
- * @return array
- */
- function getMap()
- {
- return $this->_map;
- }
-
- /**
- * If the passwords of this passwd file are shadowed in another file.
- *
- * @access public
- * @return boolean
- */
- function isShadowed()
- {
- return $this->_shadowed;
- }
-
- /**
- * Add an user
- *
- * The username must start with an alphabetical character and must NOT
- * contain any other characters than alphanumerics, the underline and dash.
- *
- * If you use the 'name map' you should also use these naming in
- * the supplied extra array, because your values would get mixed up
- * if they are in the wrong order, which is always true if you
- * DON'T use the 'name map'!
- *
- * So be warned and USE the 'name map'!
- *
- * If the passwd file is shadowed, the user will be added though, but
- * with an 'x' as password, and a PEAR_Error will be returned, too.
- *
- * Returns a PEAR_Error if:
- * o user already exists
- * o user contains illegal characters
- * o encryption mode is not supported
- * o passwords are shadowed in another file
- * o any element of the <var>$extra</var> array contains a colon (':')
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- * @param string $user the name of the user to add
- * @param string $pass the password of the user to add
- * @param array $extra extra properties of user to add
- */
- function addUser($user, $pass, $extra = array())
- {
- if ($this->userExists($user)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_EXISTS_ALREADY_STR, 'User ', $user),
- FILE_PASSWD_E_EXISTS_ALREADY
- );
- }
- if (!preg_match($this->_pcre, $user)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_CHARS_STR, 'User ', $user),
- FILE_PASSWD_E_INVALID_CHARS
- );
- }
- if (!is_array($extra)) {
- setType($extra, 'array');
- }
- foreach ($extra as $e){
- if (strstr($e, ':')) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_CHARS_STR, 'Property ', $e),
- FILE_PASSWD_E_INVALID_CHARS
- );
- }
- }
-
- /**
- * If passwords of the passwd file are shadowed,
- * the password of the user will be set to 'x'.
- */
- if ($this->_shadowed) {
- $pass = 'x';
- } else {
- $pass = $this->_genPass($pass);
- if (PEAR::isError($pass)) {
- return $pass;
- }
- }
-
- /**
- * If you don't use the 'name map' the user array will be numeric.
- */
- if (!$this->_usemap) {
- array_unshift($extra, $pass);
- $this->_users[$user] = $extra;
- } else {
- $map = $this->_map;
- array_unshift($map, 'pass');
- $extra['pass'] = $pass;
- foreach ($map as $key){
- $this->_users[$user][$key] = @$extra[$key];
- }
- }
-
- /**
- * Raise a PEAR_Error if passwords are shadowed.
- */
- if ($this->_shadowed) {
- return PEAR::raiseError(
- 'Password has been set to \'x\' because they are '.
- 'shadowed in another file.', 0
- );
- }
- return true;
- }
-
- /**
- * Modify properties of a certain user
- *
- * # DON'T MODIFY THE PASSWORD WITH THIS METHOD!
- *
- * You should use this method only if the 'name map' is used, too.
- *
- * Returns a PEAR_Error if:
- * o user doesn't exist
- * o any property contains a colon (':')
- *
- * @see changePasswd()
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- * @param string $user the user to modify
- * @param array $properties an associative array of
- * properties to modify
- */
- function modUser($user, $properties = array())
- {
- if (!$this->userExists($user)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_EXISTS_NOT_STR, 'User ', $user),
- FILE_PASSWD_E_EXISTS_NOT
- );
- }
-
- if (!is_array($properties)) {
- setType($properties, 'array');
- }
-
- foreach ($properties as $key => $value){
- if (strstr($value, ':')) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_CHARS_STR, 'User ', $user),
- FILE_PASSWD_E_INVALID_CHARS
- );
- }
- $this->_users[$user][$key] = $value;
- }
-
- return true;
- }
-
- /**
- * Change the password of a certain user
- *
- * Returns a PEAR_Error if:
- * o user doesn't exists
- * o passwords are shadowed in another file
- * o encryption mode is not supported
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true on success or PEAR_Error
- * @param string $user the user whose password should be changed
- * @param string $pass the new plaintext password
- */
- function changePasswd($user, $pass)
- {
- if ($this->_shadowed) {
- return PEAR::raiseError(
- 'Passwords of this passwd file are shadowed.',
- 0
- );
- }
-
- if (!$this->userExists($user)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_EXISTS_NOT_STR, 'User ', $user),
- FILE_PASSWD_E_EXISTS_NOT
- );
- }
-
- $pass = $this->_genPass($pass);
- if (PEAR::isError($pass)) {
- return $pass;
- }
-
- if ($this->_usemap) {
- $this->_users[$user]['pass'] = $pass;
- } else {
- $this->_users[$user][0] = $pass;
- }
-
- return true;
- }
-
- /**
- * Verify the password of a certain user
- *
- * Returns a PEAR_Error if:
- * o user doesn't exist
- * o encryption mode is not supported
- *
- * @throws PEAR_Error
- * @access public
- * @return mixed true if passwors equal, false if they don't or PEAR_Error
- * @param string $user the user whose password should be verified
- * @param string $pass the password to verify
- */
- function verifyPasswd($user, $pass)
- {
- if (!$this->userExists($user)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_EXISTS_NOT_STR, 'User ', $user),
- FILE_PASSWD_E_EXISTS_NOT
- );
- }
- $real =
- $this->_usemap ?
- $this->_users[$user]['pass'] :
- $this->_users[$user][0]
- ;
- return ($real === $this->_genPass($pass, $real));
- }
-
- /**
- * Generate crypted password from the plaintext password
- *
- * Returns a PEAR_Error if actual encryption mode is not supported.
- *
- * @throws PEAR_Error
- * @access private
- * @return mixed the crypted password or PEAR_Error
- * @param string $pass the plaintext password
- * @param string $salt the crypted password from which to gain the salt
- * @param string $mode the encryption mode to use; don't set, because
- * it's usually taken from File_Passwd_Unix::_mode
- */
- function _genPass($pass, $salt = null, $mode = null)
- {
- static $crypters;
- if (!isset($crypters)) {
- $crypters = get_class_methods('File_Passwd');
- }
-
- $mode = !isset($mode) ? strToLower($this->_mode) : strToLower($mode);
- $func = 'crypt_' . $mode;
-
- if (!in_array($func, $crypters)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_ENC_MODE_STR, $mode),
- FILE_PASSWD_E_INVALID_ENC_MODE
- );
- }
-
- return call_user_func(array('File_Passwd', $func), $pass, $salt);
- }
-
- /**
- * Generate Password
- *
- * Returns PEAR_Error FILE_PASSD_E_INVALID_ENC_MODE if the supplied
- * encryption mode is not supported.
- *
- * @see File_Passwd
- * @static
- * @access public
- * @return mixed The crypted password on success or PEAR_Error on failure.
- * @param string $pass The plaintext password.
- * @param string $mode The encryption mode to use.
- * @param string $salt The salt to use.
- */
- function generatePassword($pass, $mode = 'md5', $salt = null)
- {
- if (!isset($mode)) {
- return PEAR::raiseError(
- sprintf(FILE_PASSWD_E_INVALID_ENC_MODE_STR, '<NULL>'),
- FILE_PASSWD_E_INVALID_ENC_MODE
- );
- }
- return File_Passwd_Unix::_genPass($pass, $salt, $mode);
- }
-
- }
- ?>