/* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file util_ldap.h * @brief Apache LDAP library */ #ifndef UTIL_LDAP_H #define UTIL_LDAP_H /* APR header files */ #include "apr.h" #include "apr_thread_mutex.h" #include "apr_thread_rwlock.h" #include "apr_tables.h" #include "apr_time.h" #include "apr_ldap.h" #if APR_HAS_MICROSOFT_LDAPSDK #define AP_LDAP_IS_SERVER_DOWN(s) ((s) == LDAP_SERVER_DOWN \ ||(s) == LDAP_UNAVAILABLE) #else #define AP_LDAP_IS_SERVER_DOWN(s) ((s) == LDAP_SERVER_DOWN) #endif #if APR_HAS_SHARED_MEMORY #include "apr_rmm.h" #include "apr_shm.h" #endif /* this whole thing disappears if LDAP is not enabled */ #if APR_HAS_LDAP /* 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" #include "apr_optional.h" /* Create a set of LDAP_DECLARE macros 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 #ifdef __cplusplus extern "C" { #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; /* SSL/TLS mode of the connection */ apr_array_header_t *client_certs; /* Client certificates on this 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_global_mutex_t *util_ldap_cache_lock; apr_size_t cache_bytes; /* Size (in bytes) of shared memory cache */ char *cache_file; /* filename for shm */ 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; int ssl_supported; apr_array_header_t *global_certs; /* Global CA certificates */ apr_array_header_t *client_certs; /* Client certificates */ int secure; int secure_set; #if APR_HAS_SHARED_MEMORY apr_shm_t *cache_shm; apr_rmm_t *cache_rmm; #endif /* cache ald */ void *util_ldap_cache; char *lock_file; /* filename for shm lock mutex */ long connectionTimeout; int verify_svr_cert; } 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) */ APR_DECLARE_OPTIONAL_FN(int,uldap_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) */ APR_DECLARE_OPTIONAL_FN(void,uldap_connection_close,(util_ldap_connection_t *ldc)); /** * Unbind a connection to an LDAP server * @param ldc A structure containing the expanded details of the server * that was connected. * @tip This function unbinds the LDAP connection, and disconnects from * the server. It is used during error conditions, to bring the LDAP * connection back to a known state. * @deffunc apr_status_t util_ldap_connection_unbind(util_ldap_connection_t *ldc) */ APR_DECLARE_OPTIONAL_FN(apr_status_t,uldap_connection_unbind,(void *param)); /** * Cleanup 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_cleanup(util_ldap_connection_t *ldc) */ APR_DECLARE_OPTIONAL_FN(apr_status_t,uldap_connection_cleanup,(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) */ APR_DECLARE_OPTIONAL_FN(util_ldap_connection_t *,uldap_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) */ APR_DECLARE_OPTIONAL_FN(int,uldap_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) */ APR_DECLARE_OPTIONAL_FN(int,uldap_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) */ APR_DECLARE_OPTIONAL_FN(int,uldap_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)); /** * Searches for a specified user object in an LDAP directory * @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 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_getuserdn(request_rec *r, util_ldap_connection_t *ldc, * char *url, const char *basedn, int scope, char **attrs, * char *filter, char **binddn, char ***retvals) */ APR_DECLARE_OPTIONAL_FN(int,uldap_cache_getuserdn,(request_rec *r, util_ldap_connection_t *ldc, const char *url, const char *basedn, int scope, char **attrs, const char *filter, const char **binddn, const char ***retvals)); /** * Checks if SSL support is available in mod_ldap * @deffunc int util_ldap_ssl_supported(request_rec *r) */ APR_DECLARE_OPTIONAL_FN(int,uldap_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, util_ldap_state_t *st) * @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, util_ldap_state_t *st); /* 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, util_ldap_state_t *st) */ char *util_ald_cache_display(request_rec *r, util_ldap_state_t *st); #ifdef __cplusplus } #endif #endif /* APR_HAS_LDAP */ #endif /* UTIL_LDAP_H */