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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#ifndef UTIL_LDAP_H
#define UTIL_LDAP_H
#include <apr_ldap.h>
/* this whole thing disappears if LDAP is not enabled */
#ifdef APU_HAS_LDAP
/* APR header files */
#include <apr_thread_mutex.h>
#include <apr_thread_rwlock.h>
#include <apr_tables.h>
#include <apr_time.h>
/* Apache header files */
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
#include "http_request.h"
/* Create a set of LDAP_DECLARE(type), LDLDAP_DECLARE(type) and
* LDAP_DECLARE_DATA with appropriate export and import tags for the platform
*/
#if !defined(WIN32)
#define LDAP_DECLARE(type) type
#define LDAP_DECLARE_NONSTD(type) type
#define LDAP_DECLARE_DATA
#elif defined(LDAP_DECLARE_STATIC)
#define LDAP_DECLARE(type) type __stdcall
#define LDAP_DECLARE_NONSTD(type) type
#define LDAP_DECLARE_DATA
#elif defined(LDAP_DECLARE_EXPORT)
#define LDAP_DECLARE(type) __declspec(dllexport) type __stdcall
#define LDAP_DECLARE_NONSTD(type) __declspec(dllexport) type
#define LDAP_DECLARE_DATA __declspec(dllexport)
#else
#define LDAP_DECLARE(type) __declspec(dllimport) type __stdcall
#define LDAP_DECLARE_NONSTD(type) __declspec(dllimport) type
#define LDAP_DECLARE_DATA __declspec(dllimport)
#endif
/*
* LDAP Connections
*/
/* Values that the deref member can have */
typedef enum {
never=LDAP_DEREF_NEVER,
searching=LDAP_DEREF_SEARCHING,
finding=LDAP_DEREF_FINDING,
always=LDAP_DEREF_ALWAYS
} deref_options;
/* Structure representing an LDAP connection */
typedef struct util_ldap_connection_t {
LDAP *ldap;
apr_pool_t *pool; /* Pool from which this connection is created */
#if APR_HAS_THREADS
apr_thread_mutex_t *lock; /* Lock to indicate this connection is in use */
#endif
int bound; /* Flag to indicate whether this connection is bound yet */
const char *host; /* Name of the LDAP server (or space separated list) */
int port; /* Port of the LDAP server */
deref_options deref; /* how to handle alias dereferening */
const char *binddn; /* DN to bind to server (can be NULL) */
const char *bindpw; /* Password to bind to server (can be NULL) */
int secure; /* True if use SSL connection */
const char *reason; /* Reason for an error failure */
struct util_ldap_connection_t *next;
} util_ldap_connection_t;
/* LDAP cache state information */
typedef struct util_ldap_state_t {
apr_pool_t *pool; /* pool from which this state is allocated */
#if APR_HAS_THREADS
apr_thread_mutex_t *mutex; /* mutex lock for the connection list */
#endif
apr_size_t cache_bytes; /* Size (in bytes) of shared memory cache */
long search_cache_ttl; /* TTL for search cache */
long search_cache_size; /* Size (in entries) of search cache */
long compare_cache_ttl; /* TTL for compare cache */
long compare_cache_size; /* Size (in entries) of compare cache */
struct util_ldap_connection_t *connections;
char *cert_auth_file;
int cert_file_type;
int ssl_support;
} util_ldap_state_t;
/**
* Open a connection to an LDAP server
* @param ldc A structure containing the expanded details of the server
* to connect to. The handle to the LDAP connection is returned
* as ldc->ldap.
* @tip This function connects to the LDAP server and binds. It does not
* connect if already connected (ldc->ldap != NULL). Does not bind
* if already bound.
* @return If successful LDAP_SUCCESS is returned.
* @deffunc int util_ldap_connection_open(request_rec *r,
* util_ldap_connection_t *ldc)
*/
LDAP_DECLARE(int) util_ldap_connection_open(request_rec *r,
util_ldap_connection_t *ldc);
/**
* Close a connection to an LDAP server
* @param ldc A structure containing the expanded details of the server
* that was connected.
* @tip This function unbinds from the LDAP server, and clears ldc->ldap.
* It is possible to rebind to this server again using the same ldc
* structure, using apr_ldap_open_connection().
* @deffunc util_ldap_close_connection(util_ldap_connection_t *ldc)
*/
LDAP_DECLARE(void) util_ldap_connection_close(util_ldap_connection_t *ldc);
/**
* Destroy a connection to an LDAP server
* @param ldc A structure containing the expanded details of the server
* that was connected.
* @tip This function is registered with the pool cleanup to close down the
* LDAP connections when the server is finished with them.
* @deffunc apr_status_t util_ldap_connection_destroy(util_ldap_connection_t *ldc)
*/
LDAP_DECLARE_NONSTD(apr_status_t) util_ldap_connection_destroy(void *param);
/**
* Find a connection in a list of connections
* @param r The request record
* @param host The hostname to connect to (multiple hosts space separated)
* @param port The port to connect to
* @param binddn The DN to bind with
* @param bindpw The password to bind with
* @param deref The dereferencing behavior
* @param secure use SSL on the connection
* @tip Once a connection is found and returned, a lock will be acquired to
* lock that particular connection, so that another thread does not try and
* use this connection while it is busy. Once you are finished with a connection,
* apr_ldap_connection_close() must be called to release this connection.
* @deffunc util_ldap_connection_t *util_ldap_connection_find(request_rec *r, const char *host, int port,
* const char *binddn, const char *bindpw, deref_options deref,
* int netscapessl, int starttls)
*/
LDAP_DECLARE(util_ldap_connection_t *) util_ldap_connection_find(request_rec *r, const char *host, int port,
const char *binddn, const char *bindpw, deref_options deref,
int secure);
/**
* Compare two DNs for sameness
* @param r The request record
* @param ldc The LDAP connection being used.
* @param url The URL of the LDAP connection - used for deciding which cache to use.
* @param dn The first DN to compare.
* @param reqdn The DN to compare the first DN to.
* @param compare_dn_on_server Flag to determine whether the DNs should be checked using
* LDAP calls or with a direct string comparision. A direct
* string comparison is faster, but not as accurate - false
* negative comparisons are possible.
* @tip Two DNs can be equal and still fail a string comparison. Eg "dc=example,dc=com"
* and "dc=example, dc=com". Use the compare_dn_on_server unless there are serious
* performance issues.
* @deffunc int util_ldap_cache_comparedn(request_rec *r, util_ldap_connection_t *ldc,
* const char *url, const char *dn, const char *reqdn,
* int compare_dn_on_server)
*/
LDAP_DECLARE(int) util_ldap_cache_comparedn(request_rec *r, util_ldap_connection_t *ldc,
const char *url, const char *dn, const char *reqdn,
int compare_dn_on_server);
/**
* A generic LDAP compare function
* @param r The request record
* @param ldc The LDAP connection being used.
* @param url The URL of the LDAP connection - used for deciding which cache to use.
* @param dn The DN of the object in which we do the compare.
* @param attrib The attribute within the object we are comparing for.
* @param value The value of the attribute we are trying to compare for.
* @tip Use this function to determine whether an attribute/value pair exists within an
* object. Typically this would be used to determine LDAP group membership.
* @deffunc int util_ldap_cache_compare(request_rec *r, util_ldap_connection_t *ldc,
* const char *url, const char *dn, const char *attrib, const char *value)
*/
LDAP_DECLARE(int) util_ldap_cache_compare(request_rec *r, util_ldap_connection_t *ldc,
const char *url, const char *dn, const char *attrib, const char *value);
/**
* Checks a username/password combination by binding to the LDAP server
* @param r The request record
* @param ldc The LDAP connection being used.
* @param url The URL of the LDAP connection - used for deciding which cache to use.
* @param basedn The Base DN to search for the user in.
* @param scope LDAP scope of the search.
* @param attrs LDAP attributes to return in search.
* @param filter The user to search for in the form of an LDAP filter. This filter must return
* exactly one user for the check to be successful.
* @param bindpw The user password to bind as.
* @param binddn The DN of the user will be returned in this variable.
* @param retvals The values corresponding to the attributes requested in the attrs array.
* @tip The filter supplied will be searched for. If a single entry is returned, an attempt
* is made to bind as that user. If this bind succeeds, the user is not validated.
* @deffunc int util_ldap_cache_checkuserid(request_rec *r, util_ldap_connection_t *ldc,
* char *url, const char *basedn, int scope, char **attrs,
* char *filter, char *bindpw, char **binddn, char ***retvals)
*/
LDAP_DECLARE(int) util_ldap_cache_checkuserid(request_rec *r, util_ldap_connection_t *ldc,
const char *url, const char *basedn, int scope, char **attrs,
const char *filter, const char *bindpw, const char **binddn, const char ***retvals);
/**
* Checks if SSL support is available in mod_ldap
* @deffunc int util_ldap_ssl_supported(request_rec *r)
*/
LDAP_DECLARE(int) util_ldap_ssl_supported(request_rec *r);
/* from apr_ldap_cache.c */
/**
* Init the LDAP cache
* @param pool The pool to use to initialise the cache
* @param reqsize The size of the shared memory segement to request. A size
* of zero requests the max size possible from
* apr_shmem_init()
* @deffunc void util_ldap_cache_init(apr_pool_t *p)
* @return The status code returned is the status code of the
* apr_smmem_init() call. Regardless of the status, the cache
* will be set up at least for in-process or in-thread operation.
*/
apr_status_t util_ldap_cache_init(apr_pool_t *pool, apr_size_t reqsize);
/**
* Display formatted stats for cache
* @param The pool to allocate the returned string from
* @tip This function returns a string allocated from the provided pool that describes
* various stats about the cache.
* @deffunc char *util_ald_cache_display(apr_pool_t *pool)
*/
char *util_ald_cache_display(apr_pool_t *pool);
/* from apr_ldap_cache_mgr.c */
/**
* Display formatted stats for cache
* @param The pool to allocate the returned string from
* @tip This function returns a string allocated from the provided pool that describes
* various stats about the cache.
* @deffunc char *util_ald_cache_display(apr_pool_t *pool)
*/
char *util_ald_cache_display(apr_pool_t *pool);
#endif /* APU_HAS_LDAP */
#endif /* UTIL_LDAP_H */
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