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|
/* Copyright 2001-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed 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.
*/
/*
* util_ldap.c: LDAP things
*
* Original code from auth_ldap module for Apache v1.3:
* Copyright 1998, 1999 Enbridge Pipelines Inc.
* Copyright 1999-2001 Dave Carrigan
*/
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
#include "http_request.h"
#include "util_ldap.h"
#include "util_ldap_cache.h"
#include <apr_strings.h>
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if !APR_HAS_LDAP
#error mod_ldap requires APR-util to have LDAP support built in
#endif
#ifdef AP_NEED_SET_MUTEX_PERMS
#include "unixd.h"
#endif
/* defines for certificate file types
*/
#define LDAP_CA_TYPE_UNKNOWN 0
#define LDAP_CA_TYPE_DER 1
#define LDAP_CA_TYPE_BASE64 2
#define LDAP_CA_TYPE_CERT7_DB 3
module AP_MODULE_DECLARE_DATA ldap_module;
#define LDAP_CACHE_LOCK() do { \
if (st->util_ldap_cache_lock) \
apr_global_mutex_lock(st->util_ldap_cache_lock); \
} while (0)
#define LDAP_CACHE_UNLOCK() do { \
if (st->util_ldap_cache_lock) \
apr_global_mutex_unlock(st->util_ldap_cache_lock); \
} while (0)
static void util_ldap_strdup (char **str, const char *newstr)
{
if (*str) {
free(*str);
*str = NULL;
}
if (newstr) {
*str = strdup(newstr);
}
}
/*
* Status Handler
* --------------
*
* This handler generates a status page about the current performance of
* the LDAP cache. It is enabled as follows:
*
* <Location /ldap-status>
* SetHandler ldap-status
* </Location>
*
*/
static int util_ldap_handler(request_rec *r)
{
util_ldap_state_t *st = (util_ldap_state_t *)
ap_get_module_config(r->server->module_config,
&ldap_module);
r->allowed |= (1 << M_GET);
if (r->method_number != M_GET)
return DECLINED;
if (strcmp(r->handler, "ldap-status")) {
return DECLINED;
}
ap_set_content_type(r, "text/html");
if (r->header_only)
return OK;
ap_rputs(DOCTYPE_HTML_3_2
"<html><head><title>LDAP Cache Information</title></head>\n", r);
ap_rputs("<body bgcolor='#ffffff'><h1 align=center>LDAP Cache Information"
"</h1>\n", r);
util_ald_cache_display(r, st);
return OK;
}
/* ------------------------------------------------------------------ */
/*
* Closes an LDAP connection by unlocking it. The next time
* uldap_connection_find() is called this connection will be
* available for reuse.
*/
static void uldap_connection_close(util_ldap_connection_t *ldc)
{
/*
* QUESTION:
*
* Is it safe leaving bound connections floating around between the
* different modules? Keeping the user bound is a performance boost,
* but it is also a potential security problem - maybe.
*
* For now we unbind the user when we finish with a connection, but
* we don't have to...
*/
/* mark our connection as available for reuse */
#if APR_HAS_THREADS
apr_thread_mutex_unlock(ldc->lock);
#endif
}
/*
* Destroys an LDAP connection by unbinding and closing the connection to
* the LDAP server. It is used to bring the connection back to a known
* state after an error, and during pool cleanup.
*/
static apr_status_t uldap_connection_unbind(void *param)
{
util_ldap_connection_t *ldc = param;
if (ldc) {
if (ldc->ldap) {
ldap_unbind_s(ldc->ldap);
ldc->ldap = NULL;
}
ldc->bound = 0;
}
return APR_SUCCESS;
}
/*
* Clean up an LDAP connection by unbinding and unlocking the connection.
* This function is registered with the pool cleanup function - causing
* the LDAP connections to be shut down cleanly on graceful restart.
*/
static apr_status_t uldap_connection_cleanup(void *param)
{
util_ldap_connection_t *ldc = param;
if (ldc) {
/* unbind and disconnect from the LDAP server */
uldap_connection_unbind(ldc);
/* free the username and password */
if (ldc->bindpw) {
free((void*)ldc->bindpw);
}
if (ldc->binddn) {
free((void*)ldc->binddn);
}
/* unlock this entry */
uldap_connection_close(ldc);
}
return APR_SUCCESS;
}
/*
* Connect to the LDAP server and binds. Does not connect if already
* connected (i.e. ldc->ldap is non-NULL.) Does not bind if already bound.
*
* Returns LDAP_SUCCESS on success; and an error code on failure
*/
static int uldap_connection_open(request_rec *r,
util_ldap_connection_t *ldc)
{
int rc = 0;
int failures = 0;
int version = LDAP_VERSION3;
apr_ldap_err_t *result = NULL;
struct timeval timeOut = {10,0}; /* 10 second connection timeout */
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(r->server->module_config,
&ldap_module);
/* sanity check for NULL */
if (!ldc) {
return -1;
}
/* If the connection is already bound, return
*/
if (ldc->bound)
{
ldc->reason = "LDAP: connection open successful (already bound)";
return LDAP_SUCCESS;
}
/* create the ldap session handle
*/
if (NULL == ldc->ldap)
{
/* Since the host will include a port if the default port is not used,
* always specify the default ports for the port parameter. This will
* allow a host string that contains multiple hosts the ability to mix
* some hosts with ports and some without. All hosts which do not
* specify a port will use the default port.
*/
apr_ldap_init(ldc->pool, &(ldc->ldap),
ldc->host,
APR_LDAP_SSL == ldc->secure ? LDAPS_PORT : LDAP_PORT,
APR_LDAP_NONE,
&(result));
if (result != NULL && result->rc) {
ldc->reason = result->reason;
}
if (NULL == ldc->ldap)
{
ldc->bound = 0;
if (NULL == ldc->reason) {
ldc->reason = "LDAP: ldap initialization failed";
}
else {
ldc->reason = result->reason;
}
return(result->rc);
}
/* always default to LDAP V3 */
ldap_set_option(ldc->ldap, LDAP_OPT_PROTOCOL_VERSION, &version);
/* set client certificates */
if (!apr_is_empty_array(ldc->client_certs)) {
apr_ldap_set_option(ldc->pool, ldc->ldap, APR_LDAP_OPT_TLS_CERT,
ldc->client_certs, &(result));
if (LDAP_SUCCESS != result->rc) {
ldap_unbind_s(ldc->ldap);
ldc->ldap = NULL;
ldc->bound = 0;
ldc->reason = result->reason;
return(result->rc);
}
}
/* switch on SSL/TLS */
if (APR_LDAP_NONE != ldc->secure) {
apr_ldap_set_option(ldc->pool, ldc->ldap,
APR_LDAP_OPT_TLS, &ldc->secure, &(result));
if (LDAP_SUCCESS != result->rc) {
ldap_unbind_s(ldc->ldap);
ldc->ldap = NULL;
ldc->bound = 0;
ldc->reason = result->reason;
return(result->rc);
}
}
/* Set the alias dereferencing option */
ldap_set_option(ldc->ldap, LDAP_OPT_DEREF, &(ldc->deref));
/*XXX All of the #ifdef's need to be removed once apr-util 1.2 is released */
#ifdef APR_LDAP_OPT_VERIFY_CERT
apr_ldap_set_option(ldc->pool, ldc->ldap,
APR_LDAP_OPT_VERIFY_CERT, &(st->verify_svr_cert), &(result));
#else
#if defined(LDAPSSL_VERIFY_SERVER)
if (st->verify_svr_cert) {
result->rc = ldapssl_set_verify_mode(LDAPSSL_VERIFY_SERVER);
}
else {
result->rc = ldapssl_set_verify_mode(LDAPSSL_VERIFY_NONE);
}
#elif defined(LDAP_OPT_X_TLS_REQUIRE_CERT)
/* This is not a per-connection setting so just pass NULL for the
Ldap connection handle */
if (st->verify_svr_cert) {
int i = LDAP_OPT_X_TLS_DEMAND;
result->rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &i);
}
else {
int i = LDAP_OPT_X_TLS_NEVER;
result->rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &i);
}
#endif
#endif
#ifdef LDAP_OPT_NETWORK_TIMEOUT
if (st->connectionTimeout > 0) {
timeOut.tv_sec = st->connectionTimeout;
}
if (st->connectionTimeout >= 0) {
rc = apr_ldap_set_option(ldc->pool, ldc->ldap, LDAP_OPT_NETWORK_TIMEOUT,
(void *)&timeOut, &(result));
if (APR_SUCCESS != rc) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
"LDAP: Could not set the connection timeout");
}
}
#endif
}
/* loop trying to bind up to 10 times if LDAP_SERVER_DOWN error is
* returned. Break out of the loop on Success or any other error.
*
* NOTE: Looping is probably not a great idea. If the server isn't
* responding the chances it will respond after a few tries are poor.
* However, the original code looped and it only happens on
* the error condition.
*/
for (failures=0; failures<10; failures++)
{
rc = ldap_simple_bind_s(ldc->ldap,
(char *)ldc->binddn,
(char *)ldc->bindpw);
if (LDAP_SERVER_DOWN != rc) {
break;
}
}
/* free the handle if there was an error
*/
if (LDAP_SUCCESS != rc)
{
ldap_unbind_s(ldc->ldap);
ldc->ldap = NULL;
ldc->bound = 0;
ldc->reason = "LDAP: ldap_simple_bind_s() failed";
}
else {
ldc->bound = 1;
ldc->reason = "LDAP: connection open successful";
}
return(rc);
}
/*
* Compare client certificate arrays.
*
* Returns 1 on compare failure, 0 otherwise.
*/
static int compare_client_certs(apr_array_header_t *srcs,
apr_array_header_t *dests)
{
int i = 0;
struct apr_ldap_opt_tls_cert_t *src, *dest;
/* arrays both NULL? if so, then equal */
if (srcs == NULL && dests == NULL) {
return 0;
}
/* arrays different length or either NULL? If so, then not equal */
if (srcs == NULL || dests == NULL || srcs->nelts != dests->nelts) {
return 1;
}
/* run an actual comparison */
src = (struct apr_ldap_opt_tls_cert_t *)srcs->elts;
dest = (struct apr_ldap_opt_tls_cert_t *)dests->elts;
for (i = 0; i < srcs->nelts; i++) {
if (strcmp(src[i].path, dest[i].path) ||
strcmp(src[i].password, dest[i].password) ||
src[i].type != dest[i].type) {
return 1;
}
}
/* if we got here, the cert arrays were identical */
return 0;
}
/*
* Find an existing ldap connection struct that matches the
* provided ldap connection parameters.
*
* If not found in the cache, a new ldc structure will be allocated
* from st->pool and returned to the caller. If found in the cache,
* a pointer to the existing ldc structure will be returned.
*/
static 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)
{
struct util_ldap_connection_t *l, *p; /* To traverse the linked list */
int secureflag = secure;
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(r->server->module_config,
&ldap_module);
#if APR_HAS_THREADS
/* mutex lock this function */
apr_thread_mutex_lock(st->mutex);
#endif
if (secure < APR_LDAP_NONE) {
secureflag = st->secure;
}
/* Search for an exact connection match in the list that is not
* being used.
*/
for (l=st->connections,p=NULL; l; l=l->next) {
#if APR_HAS_THREADS
if (APR_SUCCESS == apr_thread_mutex_trylock(l->lock)) {
#endif
if ( (l->port == port) && (strcmp(l->host, host) == 0)
&& ((!l->binddn && !binddn) || (l->binddn && binddn
&& !strcmp(l->binddn, binddn)))
&& ((!l->bindpw && !bindpw) || (l->bindpw && bindpw
&& !strcmp(l->bindpw, bindpw)))
&& (l->deref == deref) && (l->secure == secureflag)
&& !compare_client_certs(st->client_certs, l->client_certs))
{
break;
}
#if APR_HAS_THREADS
/* If this connection didn't match the criteria, then we
* need to unlock the mutex so it is available to be reused.
*/
apr_thread_mutex_unlock(l->lock);
}
#endif
p = l;
}
/* If nothing found, search again, but we don't care about the
* binddn and bindpw this time.
*/
if (!l) {
for (l=st->connections,p=NULL; l; l=l->next) {
#if APR_HAS_THREADS
if (APR_SUCCESS == apr_thread_mutex_trylock(l->lock)) {
#endif
if ((l->port == port) && (strcmp(l->host, host) == 0) &&
(l->deref == deref) && (l->secure == secureflag) &&
!compare_client_certs(st->client_certs, l->client_certs))
{
/* the bind credentials have changed */
l->bound = 0;
util_ldap_strdup((char**)&(l->binddn), binddn);
util_ldap_strdup((char**)&(l->bindpw), bindpw);
break;
}
#if APR_HAS_THREADS
/* If this connection didn't match the criteria, then we
* need to unlock the mutex so it is available to be reused.
*/
apr_thread_mutex_unlock(l->lock);
}
#endif
p = l;
}
}
/* artificially disable cache */
/* l = NULL; */
/* If no connection what found after the second search, we
* must create one.
*/
if (!l) {
/*
* Add the new connection entry to the linked list. Note that we
* don't actually establish an LDAP connection yet; that happens
* the first time authentication is requested.
*/
/* create the details to the pool in st */
l = apr_pcalloc(st->pool, sizeof(util_ldap_connection_t));
#if APR_HAS_THREADS
apr_thread_mutex_create(&l->lock, APR_THREAD_MUTEX_DEFAULT, st->pool);
apr_thread_mutex_lock(l->lock);
#endif
l->pool = st->pool;
l->bound = 0;
l->host = apr_pstrdup(st->pool, host);
l->port = port;
l->deref = deref;
util_ldap_strdup((char**)&(l->binddn), binddn);
util_ldap_strdup((char**)&(l->bindpw), bindpw);
/* The security mode after parsing the URL will always be either
* APR_LDAP_NONE (ldap://) or APR_LDAP_SSL (ldaps://).
* If the security setting is NONE, override it to the security
* setting optionally supplied by the admin using LDAPTrustedMode
*/
l->secure = secureflag;
/* save away a copy of the client cert list that is presently valid */
l->client_certs = apr_array_copy_hdr(l->pool, st->client_certs);
/* add the cleanup to the pool */
apr_pool_cleanup_register(l->pool, l,
uldap_connection_cleanup,
apr_pool_cleanup_null);
if (p) {
p->next = l;
}
else {
st->connections = l;
}
}
#if APR_HAS_THREADS
apr_thread_mutex_unlock(st->mutex);
#endif
return l;
}
/* ------------------------------------------------------------------ */
/*
* Compares two DNs to see if they're equal. The only way to do this correctly
* is to search for the dn and then do ldap_get_dn() on the result. This should
* match the initial dn, since it would have been also retrieved with
* ldap_get_dn(). This is expensive, so if the configuration value
* compare_dn_on_server is false, just does an ordinary strcmp.
*
* The lock for the ldap cache should already be acquired.
*/
static 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)
{
int result = 0;
util_url_node_t *curl;
util_url_node_t curnode;
util_dn_compare_node_t *node;
util_dn_compare_node_t newnode;
int failures = 0;
LDAPMessage *res, *entry;
char *searchdn;
util_ldap_state_t *st = (util_ldap_state_t *)
ap_get_module_config(r->server->module_config,
&ldap_module);
/* get cache entry (or create one) */
LDAP_CACHE_LOCK();
curnode.url = url;
curl = util_ald_cache_fetch(st->util_ldap_cache, &curnode);
if (curl == NULL) {
curl = util_ald_create_caches(st, url);
}
LDAP_CACHE_UNLOCK();
/* a simple compare? */
if (!compare_dn_on_server) {
/* unlock this read lock */
if (strcmp(dn, reqdn)) {
ldc->reason = "DN Comparison FALSE (direct strcmp())";
return LDAP_COMPARE_FALSE;
}
else {
ldc->reason = "DN Comparison TRUE (direct strcmp())";
return LDAP_COMPARE_TRUE;
}
}
if (curl) {
/* no - it's a server side compare */
LDAP_CACHE_LOCK();
/* is it in the compare cache? */
newnode.reqdn = (char *)reqdn;
node = util_ald_cache_fetch(curl->dn_compare_cache, &newnode);
if (node != NULL) {
/* If it's in the cache, it's good */
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
ldc->reason = "DN Comparison TRUE (cached)";
return LDAP_COMPARE_TRUE;
}
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
}
start_over:
if (failures++ > 10) {
/* too many failures */
return result;
}
/* make a server connection */
if (LDAP_SUCCESS != (result = uldap_connection_open(r, ldc))) {
/* connect to server failed */
return result;
}
/* search for reqdn */
if ((result = ldap_search_ext_s(ldc->ldap, (char *)reqdn, LDAP_SCOPE_BASE,
"(objectclass=*)", NULL, 1,
NULL, NULL, NULL, -1, &res))
== LDAP_SERVER_DOWN)
{
ldc->reason = "DN Comparison ldap_search_ext_s() "
"failed with server down";
uldap_connection_unbind(ldc);
goto start_over;
}
if (result != LDAP_SUCCESS) {
/* search for reqdn failed - no match */
ldc->reason = "DN Comparison ldap_search_ext_s() failed";
return result;
}
entry = ldap_first_entry(ldc->ldap, res);
searchdn = ldap_get_dn(ldc->ldap, entry);
ldap_msgfree(res);
if (strcmp(dn, searchdn) != 0) {
/* compare unsuccessful */
ldc->reason = "DN Comparison FALSE (checked on server)";
result = LDAP_COMPARE_FALSE;
}
else {
if (curl) {
/* compare successful - add to the compare cache */
LDAP_CACHE_LOCK();
newnode.reqdn = (char *)reqdn;
newnode.dn = (char *)dn;
node = util_ald_cache_fetch(curl->dn_compare_cache, &newnode);
if ( (node == NULL)
|| (strcmp(reqdn, node->reqdn) != 0)
|| (strcmp(dn, node->dn) != 0))
{
util_ald_cache_insert(curl->dn_compare_cache, &newnode);
}
LDAP_CACHE_UNLOCK();
}
ldc->reason = "DN Comparison TRUE (checked on server)";
result = LDAP_COMPARE_TRUE;
}
ldap_memfree(searchdn);
return result;
}
/*
* Does an generic ldap_compare operation. It accepts a cache that it will use
* to lookup the compare in the cache. We cache two kinds of compares
* (require group compares) and (require user compares). Each compare has a different
* cache node: require group includes the DN; require user does not because the
* require user cache is owned by the
*
*/
static int uldap_cache_compare(request_rec *r, util_ldap_connection_t *ldc,
const char *url, const char *dn,
const char *attrib, const char *value)
{
int result = 0;
util_url_node_t *curl;
util_url_node_t curnode;
util_compare_node_t *compare_nodep;
util_compare_node_t the_compare_node;
apr_time_t curtime = 0; /* silence gcc -Wall */
int failures = 0;
util_ldap_state_t *st = (util_ldap_state_t *)
ap_get_module_config(r->server->module_config,
&ldap_module);
/* get cache entry (or create one) */
LDAP_CACHE_LOCK();
curnode.url = url;
curl = util_ald_cache_fetch(st->util_ldap_cache, &curnode);
if (curl == NULL) {
curl = util_ald_create_caches(st, url);
}
LDAP_CACHE_UNLOCK();
if (curl) {
/* make a comparison to the cache */
LDAP_CACHE_LOCK();
curtime = apr_time_now();
the_compare_node.dn = (char *)dn;
the_compare_node.attrib = (char *)attrib;
the_compare_node.value = (char *)value;
the_compare_node.result = 0;
compare_nodep = util_ald_cache_fetch(curl->compare_cache,
&the_compare_node);
if (compare_nodep != NULL) {
/* found it... */
if (curtime - compare_nodep->lastcompare > st->compare_cache_ttl) {
/* ...but it is too old */
util_ald_cache_remove(curl->compare_cache, compare_nodep);
}
else {
/* ...and it is good */
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
if (LDAP_COMPARE_TRUE == compare_nodep->result) {
ldc->reason = "Comparison true (cached)";
return compare_nodep->result;
}
else if (LDAP_COMPARE_FALSE == compare_nodep->result) {
ldc->reason = "Comparison false (cached)";
return compare_nodep->result;
}
else if (LDAP_NO_SUCH_ATTRIBUTE == compare_nodep->result) {
ldc->reason = "Comparison no such attribute (cached)";
return compare_nodep->result;
}
else {
ldc->reason = "Comparison undefined (cached)";
return compare_nodep->result;
}
}
}
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
}
start_over:
if (failures++ > 10) {
/* too many failures */
return result;
}
if (LDAP_SUCCESS != (result = uldap_connection_open(r, ldc))) {
/* connect failed */
return result;
}
if ((result = ldap_compare_s(ldc->ldap,
(char *)dn,
(char *)attrib,
(char *)value))
== LDAP_SERVER_DOWN) {
/* connection failed - try again */
ldc->reason = "ldap_compare_s() failed with server down";
uldap_connection_unbind(ldc);
goto start_over;
}
ldc->reason = "Comparison complete";
if ((LDAP_COMPARE_TRUE == result) ||
(LDAP_COMPARE_FALSE == result) ||
(LDAP_NO_SUCH_ATTRIBUTE == result)) {
if (curl) {
/* compare completed; caching result */
LDAP_CACHE_LOCK();
the_compare_node.lastcompare = curtime;
the_compare_node.result = result;
/* If the node doesn't exist then insert it, otherwise just update
* it with the last results
*/
compare_nodep = util_ald_cache_fetch(curl->compare_cache,
&the_compare_node);
if ( (compare_nodep == NULL)
|| (strcmp(the_compare_node.dn, compare_nodep->dn) != 0)
|| (strcmp(the_compare_node.attrib,compare_nodep->attrib) != 0)
|| (strcmp(the_compare_node.value, compare_nodep->value) != 0))
{
util_ald_cache_insert(curl->compare_cache, &the_compare_node);
}
else {
compare_nodep->lastcompare = curtime;
compare_nodep->result = result;
}
LDAP_CACHE_UNLOCK();
}
if (LDAP_COMPARE_TRUE == result) {
ldc->reason = "Comparison true (adding to cache)";
return LDAP_COMPARE_TRUE;
}
else if (LDAP_COMPARE_FALSE == result) {
ldc->reason = "Comparison false (adding to cache)";
return LDAP_COMPARE_FALSE;
}
else {
ldc->reason = "Comparison no such attribute (adding to cache)";
return LDAP_NO_SUCH_ATTRIBUTE;
}
}
return result;
}
static 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)
{
const char **vals = NULL;
int numvals = 0;
int result = 0;
LDAPMessage *res, *entry;
char *dn;
int count;
int failures = 0;
util_url_node_t *curl; /* Cached URL node */
util_url_node_t curnode;
util_search_node_t *search_nodep; /* Cached search node */
util_search_node_t the_search_node;
apr_time_t curtime;
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(r->server->module_config,
&ldap_module);
/* Get the cache node for this url */
LDAP_CACHE_LOCK();
curnode.url = url;
curl = (util_url_node_t *)util_ald_cache_fetch(st->util_ldap_cache,
&curnode);
if (curl == NULL) {
curl = util_ald_create_caches(st, url);
}
LDAP_CACHE_UNLOCK();
if (curl) {
LDAP_CACHE_LOCK();
the_search_node.username = filter;
search_nodep = util_ald_cache_fetch(curl->search_cache,
&the_search_node);
if (search_nodep != NULL) {
/* found entry in search cache... */
curtime = apr_time_now();
/*
* Remove this item from the cache if its expired. If the sent
* password doesn't match the storepassword, the entry will
* be removed and readded later if the credentials pass
* authentication.
*/
if ((curtime - search_nodep->lastbind) > st->search_cache_ttl) {
/* ...but entry is too old */
util_ald_cache_remove(curl->search_cache, search_nodep);
}
else if ( (search_nodep->bindpw)
&& (search_nodep->bindpw[0] != '\0')
&& (strcmp(search_nodep->bindpw, bindpw) == 0))
{
/* ...and entry is valid */
*binddn = search_nodep->dn;
*retvals = search_nodep->vals;
LDAP_CACHE_UNLOCK();
ldc->reason = "Authentication successful (cached)";
return LDAP_SUCCESS;
}
}
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
}
/*
* At this point, there is no valid cached search, so lets do the search.
*/
/*
* If LDAP operation fails due to LDAP_SERVER_DOWN, control returns here.
*/
start_over:
if (failures++ > 10) {
return result;
}
if (LDAP_SUCCESS != (result = uldap_connection_open(r, ldc))) {
return result;
}
/* try do the search */
if ((result = ldap_search_ext_s(ldc->ldap,
(char *)basedn, scope,
(char *)filter, attrs, 0,
NULL, NULL, NULL, -1, &res))
== LDAP_SERVER_DOWN)
{
ldc->reason = "ldap_search_ext_s() for user failed with server down";
uldap_connection_unbind(ldc);
goto start_over;
}
/* if there is an error (including LDAP_NO_SUCH_OBJECT) return now */
if (result != LDAP_SUCCESS) {
ldc->reason = "ldap_search_ext_s() for user failed";
return result;
}
/*
* We should have found exactly one entry; to find a different
* number is an error.
*/
count = ldap_count_entries(ldc->ldap, res);
if (count != 1)
{
if (count == 0 )
ldc->reason = "User not found";
else
ldc->reason = "User is not unique (search found two "
"or more matches)";
ldap_msgfree(res);
return LDAP_NO_SUCH_OBJECT;
}
entry = ldap_first_entry(ldc->ldap, res);
/* Grab the dn, copy it into the pool, and free it again */
dn = ldap_get_dn(ldc->ldap, entry);
*binddn = apr_pstrdup(r->pool, dn);
ldap_memfree(dn);
/*
* A bind to the server with an empty password always succeeds, so
* we check to ensure that the password is not empty. This implies
* that users who actually do have empty passwords will never be
* able to authenticate with this module. I don't see this as a big
* problem.
*/
if (!bindpw || strlen(bindpw) <= 0) {
ldap_msgfree(res);
ldc->reason = "Empty password not allowed";
return LDAP_INVALID_CREDENTIALS;
}
/*
* Attempt to bind with the retrieved dn and the password. If the bind
* fails, it means that the password is wrong (the dn obviously
* exists, since we just retrieved it)
*/
if ((result = ldap_simple_bind_s(ldc->ldap,
(char *)*binddn,
(char *)bindpw)) == LDAP_SERVER_DOWN) {
ldc->reason = "ldap_simple_bind_s() to check user credentials "
"failed with server down";
ldap_msgfree(res);
uldap_connection_unbind(ldc);
goto start_over;
}
/* failure? if so - return */
if (result != LDAP_SUCCESS) {
ldc->reason = "ldap_simple_bind_s() to check user credentials failed";
ldap_msgfree(res);
uldap_connection_unbind(ldc);
return result;
}
else {
/*
* We have just bound the connection to a different user and password
* combination, which might be reused unintentionally next time this
* connection is used from the connection pool. To ensure no confusion,
* we mark the connection as unbound.
*/
ldc->bound = 0;
}
/*
* Get values for the provided attributes.
*/
if (attrs) {
int k = 0;
int i = 0;
while (attrs[k++]);
vals = apr_pcalloc(r->pool, sizeof(char *) * (k+1));
numvals = k;
while (attrs[i]) {
char **values;
int j = 0;
char *str = NULL;
/* get values */
values = ldap_get_values(ldc->ldap, entry, attrs[i]);
while (values && values[j]) {
str = str ? apr_pstrcat(r->pool, str, "; ", values[j], NULL)
: apr_pstrdup(r->pool, values[j]);
j++;
}
ldap_value_free(values);
vals[i] = str;
i++;
}
*retvals = vals;
}
/*
* Add the new username to the search cache.
*/
if (curl) {
LDAP_CACHE_LOCK();
the_search_node.username = filter;
the_search_node.dn = *binddn;
the_search_node.bindpw = bindpw;
the_search_node.lastbind = apr_time_now();
the_search_node.vals = vals;
the_search_node.numvals = numvals;
/* Search again to make sure that another thread didn't ready insert
* this node into the cache before we got here. If it does exist then
* update the lastbind
*/
search_nodep = util_ald_cache_fetch(curl->search_cache,
&the_search_node);
if ((search_nodep == NULL) ||
(strcmp(*binddn, search_nodep->dn) != 0)) {
/* Nothing in cache, insert new entry */
util_ald_cache_insert(curl->search_cache, &the_search_node);
}
else if ((!search_nodep->bindpw) ||
(strcmp(bindpw, search_nodep->bindpw) != 0)) {
/* Entry in cache is invalid, remove it and insert new one */
util_ald_cache_remove(curl->search_cache, search_nodep);
util_ald_cache_insert(curl->search_cache, &the_search_node);
}
else {
/* Cache entry is valid, update lastbind */
search_nodep->lastbind = the_search_node.lastbind;
}
LDAP_CACHE_UNLOCK();
}
ldap_msgfree(res);
ldc->reason = "Authentication successful";
return LDAP_SUCCESS;
}
/*
* This function will return the DN of the entry matching userid.
* It is used to get the DN in case some other module than mod_auth_ldap
* has authenticated the user.
* The function is basically a copy of uldap_cache_checkuserid
* with password checking removed.
*/
static 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)
{
const char **vals = NULL;
int numvals = 0;
int result = 0;
LDAPMessage *res, *entry;
char *dn;
int count;
int failures = 0;
util_url_node_t *curl; /* Cached URL node */
util_url_node_t curnode;
util_search_node_t *search_nodep; /* Cached search node */
util_search_node_t the_search_node;
apr_time_t curtime;
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(r->server->module_config,
&ldap_module);
/* Get the cache node for this url */
LDAP_CACHE_LOCK();
curnode.url = url;
curl = (util_url_node_t *)util_ald_cache_fetch(st->util_ldap_cache,
&curnode);
if (curl == NULL) {
curl = util_ald_create_caches(st, url);
}
LDAP_CACHE_UNLOCK();
if (curl) {
LDAP_CACHE_LOCK();
the_search_node.username = filter;
search_nodep = util_ald_cache_fetch(curl->search_cache,
&the_search_node);
if (search_nodep != NULL) {
/* found entry in search cache... */
curtime = apr_time_now();
/*
* Remove this item from the cache if its expired.
*/
if ((curtime - search_nodep->lastbind) > st->search_cache_ttl) {
/* ...but entry is too old */
util_ald_cache_remove(curl->search_cache, search_nodep);
}
else {
/* ...and entry is valid */
*binddn = search_nodep->dn;
*retvals = search_nodep->vals;
LDAP_CACHE_UNLOCK();
ldc->reason = "Search successful (cached)";
return LDAP_SUCCESS;
}
}
/* unlock this read lock */
LDAP_CACHE_UNLOCK();
}
/*
* At this point, there is no valid cached search, so lets do the search.
*/
/*
* If LDAP operation fails due to LDAP_SERVER_DOWN, control returns here.
*/
start_over:
if (failures++ > 10) {
return result;
}
if (LDAP_SUCCESS != (result = uldap_connection_open(r, ldc))) {
return result;
}
/* try do the search */
if ((result = ldap_search_ext_s(ldc->ldap,
(char *)basedn, scope,
(char *)filter, attrs, 0,
NULL, NULL, NULL, -1, &res))
== LDAP_SERVER_DOWN)
{
ldc->reason = "ldap_search_ext_s() for user failed with server down";
uldap_connection_unbind(ldc);
goto start_over;
}
/* if there is an error (including LDAP_NO_SUCH_OBJECT) return now */
if (result != LDAP_SUCCESS) {
ldc->reason = "ldap_search_ext_s() for user failed";
return result;
}
/*
* We should have found exactly one entry; to find a different
* number is an error.
*/
count = ldap_count_entries(ldc->ldap, res);
if (count != 1)
{
if (count == 0 )
ldc->reason = "User not found";
else
ldc->reason = "User is not unique (search found two "
"or more matches)";
ldap_msgfree(res);
return LDAP_NO_SUCH_OBJECT;
}
entry = ldap_first_entry(ldc->ldap, res);
/* Grab the dn, copy it into the pool, and free it again */
dn = ldap_get_dn(ldc->ldap, entry);
*binddn = apr_pstrdup(r->pool, dn);
ldap_memfree(dn);
/*
* Get values for the provided attributes.
*/
if (attrs) {
int k = 0;
int i = 0;
while (attrs[k++]);
vals = apr_pcalloc(r->pool, sizeof(char *) * (k+1));
numvals = k;
while (attrs[i]) {
char **values;
int j = 0;
char *str = NULL;
/* get values */
values = ldap_get_values(ldc->ldap, entry, attrs[i]);
while (values && values[j]) {
str = str ? apr_pstrcat(r->pool, str, "; ", values[j], NULL)
: apr_pstrdup(r->pool, values[j]);
j++;
}
ldap_value_free(values);
vals[i] = str;
i++;
}
*retvals = vals;
}
/*
* Add the new username to the search cache.
*/
if (curl) {
LDAP_CACHE_LOCK();
the_search_node.username = filter;
the_search_node.dn = *binddn;
the_search_node.bindpw = NULL;
the_search_node.lastbind = apr_time_now();
the_search_node.vals = vals;
the_search_node.numvals = numvals;
/* Search again to make sure that another thread didn't ready insert
* this node into the cache before we got here. If it does exist then
* update the lastbind
*/
search_nodep = util_ald_cache_fetch(curl->search_cache,
&the_search_node);
if ((search_nodep == NULL) ||
(strcmp(*binddn, search_nodep->dn) != 0)) {
/* Nothing in cache, insert new entry */
util_ald_cache_insert(curl->search_cache, &the_search_node);
}
/*
* Don't update lastbind on entries with bindpw because
* we haven't verified that password. It's OK to update
* the entry if there is no password in it.
*/
else if (!search_nodep->bindpw) {
/* Cache entry is valid, update lastbind */
search_nodep->lastbind = the_search_node.lastbind;
}
LDAP_CACHE_UNLOCK();
}
ldap_msgfree(res);
ldc->reason = "Search successful";
return LDAP_SUCCESS;
}
/*
* Reports if ssl support is enabled
*
* 1 = enabled, 0 = not enabled
*/
static int uldap_ssl_supported(request_rec *r)
{
util_ldap_state_t *st = (util_ldap_state_t *)ap_get_module_config(
r->server->module_config, &ldap_module);
return(st->ssl_supported);
}
/* ---------------------------------------- */
/* config directives */
static const char *util_ldap_set_cache_bytes(cmd_parms *cmd, void *dummy,
const char *bytes)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
st->cache_bytes = atol(bytes);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap cache: Setting shared memory "
" cache size to %" APR_SIZE_T_FMT " bytes.",
getpid(), st->cache_bytes);
return NULL;
}
static const char *util_ldap_set_cache_file(cmd_parms *cmd, void *dummy,
const char *file)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
if (file) {
st->cache_file = ap_server_root_relative(st->pool, file);
}
else {
st->cache_file = NULL;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"LDAP cache: Setting shared memory cache file to %s bytes.",
st->cache_file);
return NULL;
}
static const char *util_ldap_set_cache_ttl(cmd_parms *cmd, void *dummy,
const char *ttl)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
st->search_cache_ttl = atol(ttl) * 1000000;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap cache: Setting cache TTL to %ld microseconds.",
getpid(), st->search_cache_ttl);
return NULL;
}
static const char *util_ldap_set_cache_entries(cmd_parms *cmd, void *dummy,
const char *size)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
st->search_cache_size = atol(size);
if (st->search_cache_size < 0) {
st->search_cache_size = 0;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap cache: Setting search cache size to %ld entries.",
getpid(), st->search_cache_size);
return NULL;
}
static const char *util_ldap_set_opcache_ttl(cmd_parms *cmd, void *dummy,
const char *ttl)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
st->compare_cache_ttl = atol(ttl) * 1000000;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap cache: Setting operation cache TTL to %ld microseconds.",
getpid(), st->compare_cache_ttl);
return NULL;
}
static const char *util_ldap_set_opcache_entries(cmd_parms *cmd, void *dummy,
const char *size)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
st->compare_cache_size = atol(size);
if (st->compare_cache_size < 0) {
st->compare_cache_size = 0;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap cache: Setting operation cache size to %ld "
"entries.", getpid(), st->compare_cache_size);
return NULL;
}
/**
* Parse the certificate type.
*
* The type can be one of the following:
* CA_DER, CA_BASE64, CA_CERT7_DB, CA_SECMOD, CERT_DER, CERT_BASE64,
* CERT_KEY3_DB, CERT_NICKNAME, KEY_DER, KEY_BASE64
*
* If no matches are found, APR_LDAP_CA_TYPE_UNKNOWN is returned.
*/
static int util_ldap_parse_cert_type(const char *type)
{
/* Authority file in binary DER format */
if (0 == strcasecmp("CA_DER", type)) {
return APR_LDAP_CA_TYPE_DER;
}
/* Authority file in Base64 format */
else if (0 == strcasecmp("CA_BASE64", type)) {
return APR_LDAP_CA_TYPE_BASE64;
}
/* Netscape certificate database file/directory */
else if (0 == strcasecmp("CA_CERT7_DB", type)) {
return APR_LDAP_CA_TYPE_CERT7_DB;
}
/* Netscape secmod file/directory */
else if (0 == strcasecmp("CA_SECMOD", type)) {
return APR_LDAP_CA_TYPE_SECMOD;
}
/* Client cert file in DER format */
else if (0 == strcasecmp("CERT_DER", type)) {
return APR_LDAP_CERT_TYPE_DER;
}
/* Client cert file in Base64 format */
else if (0 == strcasecmp("CERT_BASE64", type)) {
return APR_LDAP_CERT_TYPE_BASE64;
}
/* Client cert file in PKCS#12 format */
else if (0 == strcasecmp("CERT_PFX", type)) {
return APR_LDAP_CERT_TYPE_PFX;
}
/* Netscape client cert database file/directory */
else if (0 == strcasecmp("CERT_KEY3_DB", type)) {
return APR_LDAP_CERT_TYPE_KEY3_DB;
}
/* Netscape client cert nickname */
else if (0 == strcasecmp("CERT_NICKNAME", type)) {
return APR_LDAP_CERT_TYPE_NICKNAME;
}
/* Client cert key file in DER format */
else if (0 == strcasecmp("KEY_DER", type)) {
return APR_LDAP_KEY_TYPE_DER;
}
/* Client cert key file in Base64 format */
else if (0 == strcasecmp("KEY_BASE64", type)) {
return APR_LDAP_KEY_TYPE_BASE64;
}
/* Client cert key file in PKCS#12 format */
else if (0 == strcasecmp("KEY_PFX", type)) {
return APR_LDAP_KEY_TYPE_PFX;
}
else {
return APR_LDAP_CA_TYPE_UNKNOWN;
}
}
/**
* Set LDAPTrustedGlobalCert.
*
* This directive takes either two or three arguments:
* - certificate type
* - certificate file / directory / nickname
* - certificate password (optional)
*
* This directive may only be used globally.
*/
static const char *util_ldap_set_trusted_global_cert(cmd_parms *cmd,
void *dummy,
const char *type,
const char *file,
const char *password)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
apr_finfo_t finfo;
apr_status_t rv;
int cert_type = 0;
apr_ldap_opt_tls_cert_t *cert;
if (err != NULL) {
return err;
}
/* handle the certificate type */
if (type) {
cert_type = util_ldap_parse_cert_type(type);
if (APR_LDAP_CA_TYPE_UNKNOWN == cert_type) {
return apr_psprintf(cmd->pool, "The certificate type %s is "
"not recognised. It should be one "
"of CA_DER, CA_BASE64, CA_CERT7_DB, "
"CA_SECMOD, CERT_DER, CERT_BASE64, "
"CERT_KEY3_DB, CERT_NICKNAME, "
"KEY_DER, KEY_BASE64", type);
}
}
else {
return "Certificate type was not specified.";
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"LDAP: SSL trusted global cert - %s (type %s)",
file, type);
/* add the certificate to the global array */
cert = (apr_ldap_opt_tls_cert_t *)apr_array_push(st->global_certs);
cert->type = cert_type;
cert->path = file;
cert->password = password;
/* if file is a file or path, fix the path */
if (cert_type != APR_LDAP_CA_TYPE_UNKNOWN &&
cert_type != APR_LDAP_CERT_TYPE_NICKNAME) {
cert->path = ap_server_root_relative(cmd->pool, file);
if (cert->path &&
((rv = apr_stat (&finfo, cert->path, APR_FINFO_MIN, cmd->pool))
!= APR_SUCCESS))
{
ap_log_error(APLOG_MARK, APLOG_ERR, rv, cmd->server,
"LDAP: Could not open SSL trusted certificate "
"authority file - %s",
cert->path == NULL ? file : cert->path);
return "Invalid global certificate file path";
}
}
return(NULL);
}
/**
* Set LDAPTrustedClientCert.
*
* This directive takes either two or three arguments:
* - certificate type
* - certificate file / directory / nickname
* - certificate password (optional)
*/
static const char *util_ldap_set_trusted_client_cert(cmd_parms *cmd,
void *config,
const char *type,
const char *file,
const char *password)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
apr_finfo_t finfo;
apr_status_t rv;
int cert_type = 0;
apr_ldap_opt_tls_cert_t *cert;
/* handle the certificate type */
if (type) {
cert_type = util_ldap_parse_cert_type(type);
if (APR_LDAP_CA_TYPE_UNKNOWN == cert_type) {
return apr_psprintf(cmd->pool, "The certificate type \"%s\" is "
"not recognised. It should be one "
"of CERT_DER, CERT_BASE64, "
"CERT_NICKNAME, CERT_PFX,"
"KEY_DER, KEY_BASE64, KEY_PFX",
type);
}
else if (APR_LDAP_CA_TYPE_DER == cert_type ||
APR_LDAP_CA_TYPE_BASE64 == cert_type ||
APR_LDAP_CA_TYPE_CERT7_DB == cert_type ||
APR_LDAP_CA_TYPE_SECMOD == cert_type ||
APR_LDAP_CERT_TYPE_PFX == cert_type ||
APR_LDAP_CERT_TYPE_KEY3_DB == cert_type) {
return apr_psprintf(cmd->pool, "The certificate type \"%s\" is "
"only valid within a "
"LDAPTrustedGlobalCert directive. "
"Only CERT_DER, CERT_BASE64, "
"CERT_NICKNAME, KEY_DER, and "
"KEY_BASE64 may be used.", type);
}
}
else {
return "Certificate type was not specified.";
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"LDAP: SSL trusted client cert - %s (type %s)",
file, type);
/* add the certificate to the global array */
cert = (apr_ldap_opt_tls_cert_t *)apr_array_push(st->global_certs);
cert->type = cert_type;
cert->path = file;
cert->password = password;
/* if file is a file or path, fix the path */
if (cert_type != APR_LDAP_CA_TYPE_UNKNOWN &&
cert_type != APR_LDAP_CERT_TYPE_NICKNAME) {
cert->path = ap_server_root_relative(cmd->pool, file);
if (cert->path &&
((rv = apr_stat (&finfo, cert->path, APR_FINFO_MIN, cmd->pool))
!= APR_SUCCESS))
{
ap_log_error(APLOG_MARK, APLOG_ERR, rv, cmd->server,
"LDAP: Could not open SSL client certificate "
"file - %s",
cert->path == NULL ? file : cert->path);
return "Invalid client certificate file path";
}
}
return(NULL);
}
/**
* Set LDAPTrustedMode.
*
* This directive sets what encryption mode to use on a connection:
* - None (No encryption)
* - SSL (SSL encryption)
* - STARTTLS (TLS encryption)
*/
static const char *util_ldap_set_trusted_mode(cmd_parms *cmd, void *dummy,
const char *mode)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"LDAP: SSL trusted mode - %s",
mode);
if (0 == strcasecmp("NONE", mode)) {
st->secure = APR_LDAP_NONE;
}
else if (0 == strcasecmp("SSL", mode)) {
st->secure = APR_LDAP_SSL;
}
else if ( (0 == strcasecmp("TLS", mode))
|| (0 == strcasecmp("STARTTLS", mode))) {
st->secure = APR_LDAP_STARTTLS;
}
else {
return "Invalid LDAPTrustedMode setting: must be one of NONE, "
"SSL, or TLS/STARTTLS";
}
st->secure_set = 1;
return(NULL);
}
static const char *util_ldap_set_verify_srv_cert(cmd_parms *cmd,
void *dummy,
int mode)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"LDAP: SSL verify server certificate - %s",
mode?"TRUE":"FALSE");
st->verify_svr_cert = mode;
return(NULL);
}
static const char *util_ldap_set_connection_timeout(cmd_parms *cmd,
void *dummy,
const char *ttl)
{
util_ldap_state_t *st =
(util_ldap_state_t *)ap_get_module_config(cmd->server->module_config,
&ldap_module);
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
#ifdef LDAP_OPT_NETWORK_TIMEOUT
st->connectionTimeout = atol(ttl);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
"[%" APR_PID_T_FMT "] ldap connection: Setting connection timeout to "
"%ld seconds.", getpid(), st->connectionTimeout);
#else
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, cmd->server,
"LDAP: Connection timout option not supported by the "
"LDAP SDK in use." );
#endif
return NULL;
}
static void *util_ldap_create_config(apr_pool_t *p, server_rec *s)
{
util_ldap_state_t *st =
(util_ldap_state_t *)apr_pcalloc(p, sizeof(util_ldap_state_t));
/* Create a pool for mod_ldap to use */
apr_pool_create(&st->pool, p);
#if APR_HAS_THREADS
apr_thread_mutex_create(&st->mutex, APR_THREAD_MUTEX_DEFAULT, st->pool);
#endif
st->cache_bytes = 100000;
st->search_cache_ttl = 600000000;
st->search_cache_size = 1024;
st->compare_cache_ttl = 600000000;
st->compare_cache_size = 1024;
st->connections = NULL;
st->ssl_supported = 0;
st->global_certs = apr_array_make(p, 10, sizeof(apr_ldap_opt_tls_cert_t));
st->client_certs = apr_array_make(p, 10, sizeof(apr_ldap_opt_tls_cert_t));
st->secure = APR_LDAP_NONE;
st->secure_set = 0;
st->connectionTimeout = 10;
st->verify_svr_cert = 1;
return st;
}
static void *util_ldap_merge_config(apr_pool_t *p, void *basev,
void *overridesv)
{
util_ldap_state_t *st = apr_pcalloc(p, sizeof(util_ldap_state_t));
util_ldap_state_t *base = (util_ldap_state_t *) basev;
util_ldap_state_t *overrides = (util_ldap_state_t *) overridesv;
st->pool = base->pool;
#if APR_HAS_THREADS
st->mutex = base->mutex;
#endif
st->cache_bytes = base->cache_bytes;
st->search_cache_ttl = base->search_cache_ttl;
st->search_cache_size = base->search_cache_size;
st->compare_cache_ttl = base->compare_cache_ttl;
st->compare_cache_size = base->compare_cache_size;
st->connections = base->connections;
st->ssl_supported = base->ssl_supported;
st->global_certs = apr_array_append(p, base->global_certs,
overrides->global_certs);
st->client_certs = apr_array_append(p, base->client_certs,
overrides->client_certs);
st->secure = (overrides->secure_set == 0) ? base->secure
: overrides->secure;
return st;
}
static apr_status_t util_ldap_cleanup_module(void *data)
{
server_rec *s = data;
util_ldap_state_t *st = (util_ldap_state_t *)ap_get_module_config(
s->module_config, &ldap_module);
if (st->ssl_supported) {
apr_ldap_ssl_deinit();
}
return APR_SUCCESS;
}
static int util_ldap_post_config(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s)
{
apr_status_t result;
server_rec *s_vhost;
util_ldap_state_t *st_vhost;
util_ldap_state_t *st = (util_ldap_state_t *)
ap_get_module_config(s->module_config,
&ldap_module);
void *data;
const char *userdata_key = "util_ldap_init";
apr_ldap_err_t *result_err = NULL;
int rc;
/* util_ldap_post_config() will be called twice. Don't bother
* going through all of the initialization on the first call
* because it will just be thrown away.*/
apr_pool_userdata_get(&data, userdata_key, s->process->pool);
if (!data) {
apr_pool_userdata_set((const void *)1, userdata_key,
apr_pool_cleanup_null, s->process->pool);
#if APR_HAS_SHARED_MEMORY
/* If the cache file already exists then delete it. Otherwise we are
* going to run into problems creating the shared memory. */
if (st->cache_file) {
char *lck_file = apr_pstrcat(ptemp, st->cache_file, ".lck",
NULL);
apr_file_remove(lck_file, ptemp);
}
#endif
return OK;
}
#if APR_HAS_SHARED_MEMORY
/* initializing cache if shared memory size is not zero and we already
* don't have shm address
*/
if (!st->cache_shm && st->cache_bytes > 0) {
#endif
result = util_ldap_cache_init(p, st);
if (result != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, result, s,
"LDAP cache: could not create shared memory segment");
return DONE;
}
#if APR_HAS_SHARED_MEMORY
if (st->cache_file) {
st->lock_file = apr_pstrcat(st->pool, st->cache_file, ".lck",
NULL);
}
#endif
result = apr_global_mutex_create(&st->util_ldap_cache_lock,
st->lock_file, APR_LOCK_DEFAULT,
st->pool);
if (result != APR_SUCCESS) {
return result;
}
#ifdef AP_NEED_SET_MUTEX_PERMS
result = unixd_set_global_mutex_perms(st->util_ldap_cache_lock);
if (result != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, result, s,
"LDAP cache: failed to set mutex permissions");
return result;
}
#endif
/* merge config in all vhost */
s_vhost = s->next;
while (s_vhost) {
st_vhost = (util_ldap_state_t *)
ap_get_module_config(s_vhost->module_config,
&ldap_module);
#if APR_HAS_SHARED_MEMORY
st_vhost->cache_shm = st->cache_shm;
st_vhost->cache_rmm = st->cache_rmm;
st_vhost->cache_file = st->cache_file;
ap_log_error(APLOG_MARK, APLOG_DEBUG, result, s,
"LDAP merging Shared Cache conf: shm=0x%pp rmm=0x%pp "
"for VHOST: %s", st->cache_shm, st->cache_rmm,
s_vhost->server_hostname);
#endif
st_vhost->lock_file = st->lock_file;
s_vhost = s_vhost->next;
}
#if APR_HAS_SHARED_MEMORY
}
else {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"LDAP cache: LDAPSharedCacheSize is zero, disabling "
"shared memory cache");
}
#endif
/* log the LDAP SDK used
*/
{
apr_ldap_err_t *result = NULL;
apr_ldap_info(p, &(result));
if (result != NULL) {
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, "%s", result->reason);
}
}
apr_pool_cleanup_register(p, s, util_ldap_cleanup_module,
util_ldap_cleanup_module);
/*
* Initialize SSL support, and log the result for the benefit of the admin.
*
* If SSL is not supported it is not necessarily an error, as the
* application may not want to use it.
*/
rc = apr_ldap_ssl_init(p,
NULL,
0,
&(result_err));
if (APR_SUCCESS == rc) {
rc = apr_ldap_set_option(p, NULL, APR_LDAP_OPT_TLS_CERT,
(void *)st->global_certs, &(result_err));
}
if (APR_SUCCESS == rc) {
st->ssl_supported = 1;
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"LDAP: SSL support available" );
}
else {
st->ssl_supported = 0;
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"LDAP: SSL support unavailable%s%s",
result_err ? ": " : "",
result_err ? result_err->reason : "");
}
return(OK);
}
static void util_ldap_child_init(apr_pool_t *p, server_rec *s)
{
apr_status_t sts;
util_ldap_state_t *st = ap_get_module_config(s->module_config,
&ldap_module);
if (!st->util_ldap_cache_lock) return;
sts = apr_global_mutex_child_init(&st->util_ldap_cache_lock,
st->lock_file, p);
if (sts != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, sts, s,
"Failed to initialise global mutex %s in child process %"
APR_PID_T_FMT ".",
st->lock_file, getpid());
}
}
static const command_rec util_ldap_cmds[] = {
AP_INIT_TAKE1("LDAPSharedCacheSize", util_ldap_set_cache_bytes,
NULL, RSRC_CONF,
"Set the size of the shared memory cache (in bytes). Use "
"0 to disable the shared memory cache. (default: 100000)"),
AP_INIT_TAKE1("LDAPSharedCacheFile", util_ldap_set_cache_file,
NULL, RSRC_CONF,
"Set the file name for the shared memory cache."),
AP_INIT_TAKE1("LDAPCacheEntries", util_ldap_set_cache_entries,
NULL, RSRC_CONF,
"Set the maximum number of entries that are possible in the "
"LDAP search cache. Use 0 for no limit. "
"-1 disables the cache. (default: 1024)"),
AP_INIT_TAKE1("LDAPCacheTTL", util_ldap_set_cache_ttl,
NULL, RSRC_CONF,
"Set the maximum time (in seconds) that an item can be "
"cached in the LDAP search cache. Use 0 for no limit. "
"(default 600)"),
AP_INIT_TAKE1("LDAPOpCacheEntries", util_ldap_set_opcache_entries,
NULL, RSRC_CONF,
"Set the maximum number of entries that are possible "
"in the LDAP compare cache. Use 0 for no limit. "
"Use -1 to disable the cache. (default: 1024)"),
AP_INIT_TAKE1("LDAPOpCacheTTL", util_ldap_set_opcache_ttl,
NULL, RSRC_CONF,
"Set the maximum time (in seconds) that an item is cached "
"in the LDAP operation cache. Use 0 for no limit. "
"(default: 600)"),
AP_INIT_TAKE23("LDAPTrustedGlobalCert", util_ldap_set_trusted_global_cert,
NULL, RSRC_CONF,
"Takes three args; the file and/or directory containing "
"the trusted CA certificates (and global client certs "
"for Netware) used to validate the LDAP server. Second "
"arg is the cert type for the first arg, one of CA_DER, "
"CA_BASE64, CA_CERT7_DB, CA_SECMOD, CERT_DER, CERT_BASE64, "
"CERT_KEY3_DB, CERT_NICKNAME, KEY_DER, or KEY_BASE64. "
"Third arg is an optional passphrase if applicable."),
AP_INIT_TAKE23("LDAPTrustedClientCert", util_ldap_set_trusted_client_cert,
NULL, RSRC_CONF,
"Takes three args; the file and/or directory containing "
"the client certificate, or certificate ID used to "
"validate this LDAP client. Second arg is the cert type "
"for the first arg, one of CA_DER, CA_BASE64, CA_CERT7_DB, "
"CA_SECMOD, CERT_DER, CERT_BASE64, CERT_KEY3_DB, "
"CERT_NICKNAME, KEY_DER, or KEY_BASE64. Third arg is an "
"optional passphrase if applicable."),
AP_INIT_TAKE1("LDAPTrustedMode", util_ldap_set_trusted_mode,
NULL, RSRC_CONF,
"Specify the type of security that should be applied to "
"an LDAP connection. One of; NONE, SSL or STARTTLS."),
AP_INIT_FLAG("LDAPVerifyServerCert", util_ldap_set_verify_srv_cert,
NULL, RSRC_CONF,
"Set to 'ON' requires that the server certificate be verified "
"before a secure LDAP connection can be establish. Default 'ON'"),
AP_INIT_TAKE1("LDAPConnectionTimeout", util_ldap_set_connection_timeout,
NULL, RSRC_CONF,
"Specify the LDAP socket connection timeout in seconds "
"(default: 10)"),
{NULL}
};
static void util_ldap_register_hooks(apr_pool_t *p)
{
APR_REGISTER_OPTIONAL_FN(uldap_connection_open);
APR_REGISTER_OPTIONAL_FN(uldap_connection_close);
APR_REGISTER_OPTIONAL_FN(uldap_connection_unbind);
APR_REGISTER_OPTIONAL_FN(uldap_connection_cleanup);
APR_REGISTER_OPTIONAL_FN(uldap_connection_find);
APR_REGISTER_OPTIONAL_FN(uldap_cache_comparedn);
APR_REGISTER_OPTIONAL_FN(uldap_cache_compare);
APR_REGISTER_OPTIONAL_FN(uldap_cache_checkuserid);
APR_REGISTER_OPTIONAL_FN(uldap_cache_getuserdn);
APR_REGISTER_OPTIONAL_FN(uldap_ssl_supported);
ap_hook_post_config(util_ldap_post_config,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_handler(util_ldap_handler, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_child_init(util_ldap_child_init, NULL, NULL, APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA ldap_module = {
STANDARD20_MODULE_STUFF,
NULL, /* create dir config */
NULL, /* merge dir config */
util_ldap_create_config, /* create server config */
util_ldap_merge_config, /* merge server config */
util_ldap_cmds, /* command table */
util_ldap_register_hooks, /* set up request processing hooks */
};
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