/mantisbt-1.2.8/core/ldap_api.php
PHP | 527 lines | 436 code | 27 blank | 64 comment | 20 complexity | 76f1ebd87051d9ee2ccbba915e7cde92 MD5 | raw file
Possible License(s): LGPL-2.1, GPL-2.0
- <?php
- # MantisBT - a php based bugtracking system
- # MantisBT is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, either version 2 of the License, or
- # (at your option) any later version.
- #
- # MantisBT is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with MantisBT. If not, see <http://www.gnu.org/licenses/>.
- /**
- * LDAP API
- * @package CoreAPI
- * @subpackage LDAPAPI
- * @copyright Copyright (C) 2000 - 2002 Kenzaburo Ito - kenito@300baud.org
- * @copyright Copyright (C) 2002 - 2011 MantisBT Team - mantisbt-dev@lists.sourceforge.net
- * @link http://www.mantisbt.org
- */
- /**
- * Logs the most recent LDAP error
- * @param resource $p_ds LDAP resource identifier returned by ldap_connect
- */
- function ldap_log_error( $p_ds ) {
- log_event( LOG_LDAP, "ERROR #" . ldap_errno( $p_ds ) . ": " . ldap_error( $p_ds ) );
- }
- /**
- * Connect and bind to the LDAP directory
- * @param string $p_binddn
- * @param string $p_password
- * @return resource or false
- */
- function ldap_connect_bind( $p_binddn = '', $p_password = '' ) {
- if( !extension_loaded( 'ldap' ) ) {
- log_event( LOG_LDAP, "Error: LDAP extension missing in php" );
- trigger_error( ERROR_LDAP_EXTENSION_NOT_LOADED, ERROR );
- }
- $t_ldap_server = config_get( 'ldap_server' );
- # Connect to LDAP server
- log_event( LOG_LDAP, "Attempting connection to LDAP URI '{$t_ldap_server}'." );
- $t_ds = @ldap_connect( $t_ldap_server );
-
- if ( $t_ds !== false && $t_ds > 0 ) {
- log_event( LOG_LDAP, "Connection accepted by LDAP server" );
- $t_protocol_version = config_get( 'ldap_protocol_version' );
- if( $t_protocol_version > 0 ) {
- log_event( LOG_LDAP, "Setting LDAP protocol version to " . $t_protocol_version );
- $t_result = @ldap_set_option( $t_ds, LDAP_OPT_PROTOCOL_VERSION, $t_protocol_version );
- if( !$t_result ) {
- ldap_log_error( $t_ds );
- }
- }
- # Set referrals flag.
- $t_follow_referrals = ON == config_get( 'ldap_follow_referrals' );
- $t_result = @ldap_set_option( $t_ds, LDAP_OPT_REFERRALS, $t_follow_referrals );
- if( !$t_result ) {
- ldap_log_error( $t_ds );
- }
- # If no Bind DN and Password is set, attempt to login as the configured
- # Bind DN.
- if( is_blank( $p_binddn ) && is_blank( $p_password ) ) {
- $p_binddn = config_get( 'ldap_bind_dn', '' );
- $p_password = config_get( 'ldap_bind_passwd', '' );
- }
- if( !is_blank( $p_binddn ) && !is_blank( $p_password ) ) {
- log_event( LOG_LDAP, "Attempting bind to ldap server with username and password" );
- $t_br = @ldap_bind( $t_ds, $p_binddn, $p_password );
- } else {
- # Either the Bind DN or the Password are empty, so attempt an anonymous bind.
- log_event( LOG_LDAP, "Attempting anonymous bind to ldap server" );
- $t_br = @ldap_bind( $t_ds );
- }
- if ( !$t_br ) {
- ldap_log_error( $t_ds );
- log_event( LOG_LDAP, "Bind to ldap server failed" );
- trigger_error( ERROR_LDAP_SERVER_CONNECT_FAILED, ERROR );
- } else {
- log_event( LOG_LDAP, "Bind to ldap server successful" );
- }
- } else {
- log_event( LOG_LDAP, "Connection to ldap server failed" );
- trigger_error( ERROR_LDAP_SERVER_CONNECT_FAILED, ERROR );
- }
- return $t_ds;
- }
- $g_cache_ldap_email = array();
- /**
- * returns an email address from LDAP, given a userid
- * @param int $p_user_id
- * @return string
- */
- function ldap_email( $p_user_id ) {
- global $g_cache_ldap_email;
- if( isset( $g_cache_ldap_email[ (int)$p_user_id ] ) ) {
- return $g_cache_ldap_email[ (int)$p_user_id ];
- }
- $t_username = user_get_field( $p_user_id, 'username' );
- $t_email = ldap_email_from_username( $t_username );
- $g_cache_ldap_email[ (int)$p_user_id ] = $t_email;
- return $t_email;
- }
- /**
- * Return an email address from LDAP, given a username
- * @param string $p_username
- * @return string
- */
- function ldap_email_from_username( $p_username ) {
- if ( ldap_simulation_is_enabled() ) {
- return ldap_simulation_email_from_username( $p_username );
- }
- $t_email = ldap_get_field_from_username( $p_username, 'mail' );
- if ( $t_email === null ) {
- return '';
- }
- return $t_email;
- }
- /**
- * Gets a user's real name (common name) given the id.
- *
- * @param int $p_user_id The user id.
- * @return string real name.
- */
- function ldap_realname( $p_user_id ) {
- $t_username = user_get_field( $p_user_id, 'username' );
- return ldap_realname_from_username( $t_username );
- }
- /**
- * Gets a user real name given their user name.
- *
- * @param string $p_username The user's name.
- * @return string The user's real name.
- */
- function ldap_realname_from_username( $p_username ) {
- if ( ldap_simulation_is_enabled() ) {
- return ldap_simulatiom_realname_from_username( $p_username );
- }
- $t_ldap_realname_field = config_get( 'ldap_realname_field' );
- $t_realname = ldap_get_field_from_username( $p_username, $t_ldap_realname_field );
- if ( $t_realname === null ) {
- return '';
- }
- return $t_realname;
- }
- /**
- * Escapes the LDAP string to disallow injection.
- *
- * @param string $p_string The string to escape.
- * @return string The escaped string.
- */
- function ldap_escape_string( $p_string ) {
- $t_find = array( '\\', '*', '(', ')', '/', "\x00" );
- $t_replace = array( '\5c', '\2a', '\28', '\29', '\2f', '\00' );
- $t_string = str_replace( $t_find, $t_replace, $p_string );
- return $t_string;
- }
- /**
- * Gets the value of a specific field from LDAP given the user name
- * and LDAP field name.
- *
- * @todo Implement caching by retrieving all needed information in one query.
- * @todo Implement logging to LDAP queries same way like DB queries.
- *
- * @param string $p_username The user name.
- * @param string $p_field The LDAP field name.
- * @return string The field value or null if not found.
- */
- function ldap_get_field_from_username( $p_username, $p_field ) {
- $t_ldap_organization = config_get( 'ldap_organization' );
- $t_ldap_root_dn = config_get( 'ldap_root_dn' );
- $t_ldap_uid_field = config_get( 'ldap_uid_field' );
- $c_username = ldap_escape_string( $p_username );
- log_event( LOG_LDAP, "Retrieving field '$p_field' for '$p_username'" );
- # Bind
- log_event( LOG_LDAP, "Binding to LDAP server" );
- $t_ds = @ldap_connect_bind();
- if ( $t_ds === false ) {
- ldap_log_error( $t_ds );
- return null;
- }
- # Search
- $t_search_filter = "(&$t_ldap_organization($t_ldap_uid_field=$c_username))";
- $t_search_attrs = array( $t_ldap_uid_field, $p_field, 'dn' );
- log_event( LOG_LDAP, "Searching for $t_search_filter" );
- $t_sr = @ldap_search( $t_ds, $t_ldap_root_dn, $t_search_filter, $t_search_attrs );
- if ( $t_sr === false ) {
- ldap_log_error( $t_ds );
- ldap_unbind( $t_ds );
- log_event( LOG_LDAP, "ldap search failed" );
- return null;
- }
- # Get results
- $t_info = ldap_get_entries( $t_ds, $t_sr );
- if ( $t_info === false ) {
- ldap_log_error( $t_ds );
- log_event( LOG_LDAP, "ldap_get_entries() returned false." );
- return null;
- }
- # Free results / unbind
- log_event( LOG_LDAP, "Unbinding from LDAP server" );
- ldap_free_result( $t_sr );
- ldap_unbind( $t_ds );
- # If no matches, return null.
- if ( count( $t_info ) == 0 ) {
- log_event( LOG_LDAP, "No matches found." );
- return null;
- }
- # Make sure the requested field exists
- if( is_array($t_info[0]) && array_key_exists( $p_field, $t_info[0] ) ) {
- $t_value = $t_info[0][$p_field][0];
- log_event( LOG_LDAP, "Found value '{$t_value}' for field '{$p_field}'." );
- } else {
- log_event( LOG_LDAP, "WARNING: field '$p_field' does not exist" );
- return null;
- }
- return $t_value;
- }
- /**
- * Return true if the $uid has an assigngroup=$p_group tag, false otherwise
- * @param int $p_user_id
- * @param string $p_group
- * @return bool
- */
- function ldap_has_group( $p_user_id, $p_group ) {
- $t_ldap_organization = config_get( 'ldap_organization' );
- $t_ldap_root_dn = config_get( 'ldap_root_dn' );
- $t_username = user_get_field( $p_user_id, 'username' );
- $t_ldap_uid_field = config_get( 'ldap_uid_field', 'uid' );
- $t_search_filter = "(&$t_ldap_organization($t_ldap_uid_field=$t_username)(assignedgroup=$p_group))";
- $t_search_attrs = array(
- $t_ldap_uid_field,
- 'dn',
- 'assignedgroup',
- );
- $t_ds = ldap_connect_bind();
- log_event( LOG_LDAP, "Searching for $t_search_filter" );
- $t_sr = @ldap_search( $t_ds, $t_ldap_root_dn, $t_search_filter, $t_search_attrs );
- if( $t_sr === false ) {
- ldap_log_error( $t_ds );
- log_event( LOG_LDAP, "ldap search failed" );
- $t_entries = 0;
- } else {
- $t_entries = ldap_count_entries( $t_ds, $t_sr );
- if( $t_entries === false ) {
- ldap_log_error( $t_ds );
- $t_entries = 0;
- }
- ldap_free_result( $t_sr );
- }
- ldap_unbind( $t_ds );
- if( $t_entries > 0 ) {
- return true;
- } else {
- return false;
- }
- }
- /**
- * Attempt to authenticate the user against the LDAP directory
- * return true on successful authentication, false otherwise
- * @param int $p_user_id
- * @param string $p_password
- * @return bool
- */
- function ldap_authenticate( $p_user_id, $p_password ) {
- # if password is empty and ldap allows anonymous login, then
- # the user will be able to login, hence, we need to check
- # for this special case.
- if ( is_blank( $p_password ) ) {
- return false;
- }
- $t_username = user_get_field( $p_user_id, 'username' );
- return ldap_authenticate_by_username( $t_username, $p_password );
- }
- /**
- * Authenticates an user via LDAP given the username and password.
- *
- * @param string $p_username The user name.
- * @param string $p_password The password.
- * @return true: authenticated, false: failed to authenticate.
- */
- function ldap_authenticate_by_username( $p_username, $p_password ) {
- if ( ldap_simulation_is_enabled() ) {
- log_event( LOG_LDAP, "Authenticating via LDAP simulation" );
- $t_authenticated = ldap_simulation_authenticate_by_username( $p_username, $p_password );
- } else {
- $c_username = ldap_escape_string( $p_username );
- $t_ldap_organization = config_get( 'ldap_organization' );
- $t_ldap_root_dn = config_get( 'ldap_root_dn' );
- $t_ldap_uid_field = config_get( 'ldap_uid_field', 'uid' );
- $t_search_filter = "(&$t_ldap_organization($t_ldap_uid_field=$c_username))";
- $t_search_attrs = array(
- $t_ldap_uid_field,
- 'dn',
- );
- # Bind
- log_event( LOG_LDAP, "Binding to LDAP server" );
- $t_ds = ldap_connect_bind();
- if ( $t_ds === false ) {
- ldap_log_error( $t_ds );
- trigger_error( ERROR_LDAP_AUTH_FAILED, ERROR );
- }
- # Search for the user id
- log_event( LOG_LDAP, "Searching for $t_search_filter" );
- $t_sr = ldap_search( $t_ds, $t_ldap_root_dn, $t_search_filter, $t_search_attrs );
- if ( $t_sr === false ) {
- ldap_log_error( $t_ds );
- ldap_unbind( $t_ds );
- log_event( LOG_LDAP, "ldap search failed" );
- trigger_error( ERROR_LDAP_AUTH_FAILED, ERROR );
- }
- $t_info = @ldap_get_entries( $t_ds, $t_sr );
- if ( $t_info === false ) {
- ldap_log_error( $t_ds );
- ldap_free_result( $t_sr );
- ldap_unbind( $t_ds );
- trigger_error( ERROR_LDAP_AUTH_FAILED, ERROR );
- }
- $t_authenticated = false;
- if ( $t_info['count'] > 0 ) {
- # Try to authenticate to each until we get a match
- for ( $i = 0; $i < $t_info['count']; $i++ ) {
- $t_dn = $t_info[$i]['dn'];
- log_event( LOG_LDAP, "Checking {$t_info[$i]['dn']}" );
- # Attempt to bind with the DN and password
- if ( @ldap_bind( $t_ds, $t_dn, $p_password ) ) {
- $t_authenticated = true;
- break;
- }
- }
- } else {
- log_event( LOG_LDAP, "No matching entries found" );
- }
-
- log_event( LOG_LDAP, "Unbinding from LDAP server" );
- ldap_free_result( $t_sr );
- ldap_unbind( $t_ds );
- }
- # If user authenticated successfully then update the local DB with information
- # from LDAP. This will allow us to use the local data after login without
- # having to go back to LDAP. This will also allow fallback to DB if LDAP is down.
- if ( $t_authenticated ) {
- $t_user_id = user_get_id_by_name( $p_username );
- if ( false !== $t_user_id ) {
- user_set_field( $t_user_id, 'password', md5( $p_password ) );
- if ( ON == config_get( 'use_ldap_realname' ) ) {
- $t_realname = ldap_realname( $t_user_id );
- user_set_field( $t_user_id, 'realname', $t_realname );
- }
- if ( ON == config_get( 'use_ldap_email' ) ) {
- $t_email = ldap_email_from_username( $p_username );
- user_set_field( $t_user_id, 'email', $t_email );
- }
- }
- log_event( LOG_LDAP, "User '$p_username' authenticated" );
- } else {
- log_event( LOG_LDAP, "Authentication failed" );
- }
- return $t_authenticated;
- }
- /**
- * Checks if the LDAP simulation mode is enabled.
- *
- * @return bool true if enabled, false otherwise.
- */
- function ldap_simulation_is_enabled() {
- $t_filename = config_get( 'ldap_simulation_file_path' );
- return !is_blank( $t_filename );
- }
- /**
- * Gets a user from LDAP simulation mode given the username.
- *
- * @param string $p_username The user name.
- * @return mixed an associate array with user information or null if not found.
- */
- function ldap_simulation_get_user( $p_username ) {
- $t_filename = config_get( 'ldap_simulation_file_path' );
- $t_lines = file( $t_filename );
- if ( $t_lines === false ) {
- log_event( LOG_LDAP, "ldap_simulation_get_user: could not read simulation data from $t_filename." );
- trigger_error( ERROR_LDAP_SERVER_CONNECT_FAILED, ERROR );
- }
- foreach ( $t_lines as $t_line ) {
- $t_line = trim( $t_line, " \t\r\n" );
- $t_row = explode( ',', $t_line );
- if ( $t_row[0] != $p_username ) {
- continue;
- }
- $t_user = array();
- $t_user['username'] = $t_row[0];
- $t_user['realname'] = $t_row[1];
- $t_user['email'] = $t_row[2];
- $t_user['password'] = $t_row[3];
- return $t_user;
- }
- log_event( LOG_LDAP, "ldap_simulation_get_user: user '$p_username' not found." );
- return null;
- }
- /**
- * Given a username, gets the email address or empty address if user is not found.
- *
- * @param string $p_username The user name.
- * @return The email address or blank if user is not found.
- */
- function ldap_simulation_email_from_username( $p_username ) {
- $t_user = ldap_simulation_get_user( $p_username );
- if ( $t_user === null ) {
- log_event( LOG_LDAP, "ldap_simulation_email_from_username: user '$p_username' not found." );
- return '';
- }
- log_event( LOG_LDAP, "ldap_simulation_email_from_username: user '$p_username' has email '{$t_user['email']}'." );
- return $t_user['email'];
- }
- /**
- * Given a username, this methods gets the realname or empty string if not found.
- *
- * @param string $p_username The username.
- * @return string The real name or an empty string if not found.
- */
- function ldap_simulatiom_realname_from_username( $p_username ) {
- $t_user = ldap_simulation_get_user( $p_username );
- if ( $t_user === null ) {
- log_event( LOG_LDAP, "ldap_simulatiom_realname_from_username: user '$p_username' not found." );
- return '';
- }
- log_event( LOG_LDAP, "ldap_simulatiom_realname_from_username: user '$p_username' has email '{$t_user['realname']}'." );
- return $t_user['realname'];
- }
- /**
- * Authenticates the specified user id / password based on the simulation data.
- *
- * @param string $p_username The username.
- * @param string $p_password The password.
- * @return bool true for authenticated, false otherwise.
- */
- function ldap_simulation_authenticate_by_username( $p_username, $p_password ) {
- $c_username = ldap_escape_string( $p_username );
- $t_user = ldap_simulation_get_user( $c_username );
- if ( $t_user === null ) {
- log_event( LOG_LDAP, "ldap_simulation_authenticate: user '$p_username' not found." );
- return false;
- }
- if ( $t_user['password'] != $p_password ) {
- log_event( LOG_LDAP, "ldap_simulation_authenticate: expected password '{$t_user['password']}' and got '$p_password'." );
- return false;
- }
- log_event( LOG_LDAP, "ldap_simulation_authenticate: authentication successful for user '$p_username'." );
- return true;
- }