| /* 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_version.h" |
| #if APR_MAJOR_VERSION < 2 |
| /* The LDAP API is currently only present in APR 1.x */ |
| #include "apr_ldap.h" |
| #include "apr_ldap_rebind.h" |
| #else |
| #define APR_HAS_LDAP 0 |
| #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 |
| |
| #if defined(LDAP_UNAVAILABLE) || 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 |
| |
| /* 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 |
| |
| #if APR_HAS_MICROSOFT_LDAPSDK |
| #define timeval l_timeval |
| #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 |
| |
| 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 bound; /* Flag to indicate whether this connection is bound yet */ |
| |
| 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; |
| struct util_ldap_state_t *st; /* The LDAP vhost config this connection belongs to */ |
| int keep; /* Will this connection be kept when it's unlocked */ |
| |
| int ChaseReferrals; /* [on|off] (default = AP_LDAP_CHASEREFERRALS_ON)*/ |
| int ReferralHopLimit; /* # of referral hops to follow (default = AP_LDAP_DEFAULT_HOPLIMIT) */ |
| apr_time_t freed; /* the time this conn was placed back in the pool */ |
| apr_pool_t *rebind_pool; /* frequently cleared pool for rebind data */ |
| int must_rebind; /* The connection was last bound with other then binddn/bindpw */ |
| request_rec *r; /* request_rec used to find this util_ldap_connection_t */ |
| apr_time_t last_backend_conn; /* the approximate time of the last backend LDAP requst */ |
| } util_ldap_connection_t; |
| |
| typedef struct util_ldap_config_t { |
| int ChaseReferrals; |
| int ReferralHopLimit; |
| apr_array_header_t *client_certs; /* Client certificates */ |
| } util_ldap_config_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; |
| apr_array_header_t *global_certs; /* Global CA certificates */ |
| int ssl_supported; |
| int secure; |
| int secure_set; |
| int verify_svr_cert; |
| |
| #if APR_HAS_SHARED_MEMORY |
| apr_shm_t *cache_shm; |
| apr_rmm_t *cache_rmm; |
| #endif |
| |
| /* cache ald */ |
| void *util_ldap_cache; |
| |
| long connectionTimeout; |
| struct timeval *opTimeout; |
| |
| int debug_level; /* SDK debug level */ |
| apr_interval_time_t connection_pool_ttl; |
| int retries; /* number of retries for failed bind/search/compare */ |
| apr_interval_time_t retry_delay; /* delay between retries of failed bind/search/compare */ |
| } util_ldap_state_t; |
| |
| /* Used to store arrays of attribute labels/values. */ |
| struct mod_auth_ldap_groupattr_entry_t { |
| char *name; |
| }; |
| |
| /** |
| * 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. |
| * @fn 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(). |
| * @fn 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. |
| * @fn apr_status_t util_ldap_connection_unbind(util_ldap_connection_t *ldc) |
| */ |
| APR_DECLARE_OPTIONAL_FN(apr_status_t,uldap_connection_unbind,(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. |
| * @fn 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. |
| * @fn 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 top-level group |
| * membership. |
| * @fn 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)); |
| |
| /** |
| * An LDAP function that checks if the specified user is a member of a subgroup. |
| * @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 find subgroups to search within. |
| * @param attrib The attribute within group objects that identify users. |
| * @param value The user attribute value we are trying to compare for. |
| * @param subgroupAttrs The attributes within group objects that identify subgroups. |
| * Array of strings. |
| * @param subgroupclasses The objectClass values used to identify groups (and |
| * subgroups). apr_array_header_t *. |
| * @param cur_subgroup_depth Current recursive depth during subgroup processing. |
| * @param max_subgroup_depth Maximum depth of recursion allowed during subgroup |
| * processing. |
| * @tip Use this function to determine whether an attribute/value pair exists within a |
| * starting group object or one of its nested subgroups. Typically this would be |
| * used to determine LDAP nested group membership. |
| * @deffunc int util_ldap_cache_check_subgroups(request_rec *r, util_ldap_connection_t |
| * *ldc, const char *url, const char *dn, |
| * const char *attrib, const char value, |
| * char **subgroupAttrs, apr_array_header_t |
| * *subgroupclasses, int cur_subgroup_depth, int |
| * max_subgroup_depth ) |
| */ |
| APR_DECLARE_OPTIONAL_FN(int,uldap_cache_check_subgroups,(request_rec *r, util_ldap_connection_t *ldc, |
| const char *url, const char *dn, const char *attrib, const char *value, |
| char **subgroupAttrs, apr_array_header_t *subgroupclasses, |
| int cur_subgroup_depth, int max_subgroup_depth)); |
| |
| /** |
| * 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. |
| * @fn 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. |
| * @fn 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 |
| * @fn 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 segment to request. A size |
| * of zero requests the max size possible from |
| * apr_shmem_init() |
| * @fn 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. |
| * @fn 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 */ |
