+++ /dev/null
-/* Copyright 2001-2004 The Apache Software Foundation
- *
- * 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.
- */
-
-/*
- * mod_auth_ldap.c: LDAP authentication module
- *
- * Original code from auth_ldap module for Apache v1.3:
- * Copyright 1998, 1999 Enbridge Pipelines Inc.
- * Copyright 1999-2001 Dave Carrigan
- */
-
-#include <apr_ldap.h>
-#include <apr_strings.h>
-#include <apr_xlate.h>
-#define APR_WANT_STRFUNC
-#include <apr_want.h>
-
-#include "ap_config.h"
-#if APR_HAVE_UNISTD_H
-/* for getpid() */
-#include <unistd.h>
-#endif
-#include <ctype.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 "util_ldap.h"
-
-#if !APR_HAS_LDAP
-#error mod_auth_ldap requires APR-util to have LDAP support built in
-#endif
-
-/* per directory configuration */
-typedef struct {
- apr_pool_t *pool; /* Pool that this config is allocated from */
-#if APR_HAS_THREADS
- apr_thread_mutex_t *lock; /* Lock for this config */
-#endif
- int auth_authoritative; /* Is this auth method the one and only? */
- int enabled; /* Is auth_ldap enabled in this directory? */
-
- /* These parameters are all derived from the AuthLDAPURL directive */
- char *url; /* String representation of the URL */
-
- char *host; /* Name of the LDAP server (or space separated list) */
- int port; /* Port of the LDAP server */
- char *basedn; /* Base DN to do all searches from */
- char *attribute; /* Attribute to search for */
- char **attributes; /* Array of all the attributes to return */
- int scope; /* Scope of the search */
- char *filter; /* Filter to further limit the search */
- deref_options deref; /* how to handle alias dereferening */
- char *binddn; /* DN to bind to server (can be NULL) */
- char *bindpw; /* Password to bind to server (can be NULL) */
-
- int frontpage_hack; /* Hack for frontpage support */
- int user_is_dn; /* If true, connection->user is DN instead of userid */
- int compare_dn_on_server; /* If true, will use server to do DN compare */
-
- int have_ldap_url; /* Set if we have found an LDAP url */
-
- apr_array_header_t *groupattr; /* List of Group attributes */
- int group_attrib_is_dn; /* If true, the group attribute is the DN, otherwise,
- it's the exact string passed by the HTTP client */
-
- int secure; /* True if SSL connections are requested */
-} mod_auth_ldap_config_t;
-
-typedef struct mod_auth_ldap_request_t {
- char *dn; /* The saved dn from a successful search */
- char *user; /* The username provided by the client */
-} mod_auth_ldap_request_t;
-
-/* maximum group elements supported */
-#define GROUPATTR_MAX_ELTS 10
-
-struct mod_auth_ldap_groupattr_entry_t {
- char *name;
-};
-
-module AP_MODULE_DECLARE_DATA auth_ldap_module;
-
-/* function prototypes */
-void mod_auth_ldap_build_filter(char *filtbuf,
- request_rec *r,
- mod_auth_ldap_config_t *sec);
-int mod_auth_ldap_check_user_id(request_rec *r);
-int mod_auth_ldap_auth_checker(request_rec *r);
-void *mod_auth_ldap_create_dir_config(apr_pool_t *p, char *d);
-
-/* ---------------------------------------- */
-
-static apr_hash_t *charset_conversions = NULL;
-static char *to_charset = NULL; /* UTF-8 identifier derived from the charset.conv file */
-
-/* Derive a code page ID give a language name or ID */
-static char* derive_codepage_from_lang (apr_pool_t *p, char *language)
-{
- int lang_len;
- char *charset;
-
- if (!language) /* our default codepage */
- return apr_pstrdup(p, "ISO-8859-1");
- else
- lang_len = strlen(language);
-
- charset = (char*) apr_hash_get(charset_conversions, language, APR_HASH_KEY_STRING);
-
- if (!charset) {
- language[2] = '\0';
- charset = (char*) apr_hash_get(charset_conversions, language, APR_HASH_KEY_STRING);
- }
-
- if (charset) {
- charset = apr_pstrdup(p, charset);
- }
-
- return charset;
-}
-
-static apr_xlate_t* get_conv_set (request_rec *r)
-{
- char *lang_line = (char*)apr_table_get(r->headers_in, "accept-language");
- char *lang;
- apr_xlate_t *convset;
-
- if (lang_line) {
- lang_line = apr_pstrdup(r->pool, lang_line);
- for (lang = lang_line;*lang;lang++) {
- if ((*lang == ',') || (*lang == ';')) {
- *lang = '\0';
- break;
- }
- }
- lang = derive_codepage_from_lang(r->pool, lang_line);
-
- if (lang && (apr_xlate_open(&convset, to_charset, lang, r->pool) == APR_SUCCESS)) {
- return convset;
- }
- }
-
- return NULL;
-}
-
-
-/*
- * Build the search filter, or at least as much of the search filter that
- * will fit in the buffer. We don't worry about the buffer not being able
- * to hold the entire filter. If the buffer wasn't big enough to hold the
- * filter, ldap_search_s will complain, but the only situation where this
- * is likely to happen is if the client sent a really, really long
- * username, most likely as part of an attack.
- *
- * The search filter consists of the filter provided with the URL,
- * combined with a filter made up of the attribute provided with the URL,
- * and the actual username passed by the HTTP client. For example, assume
- * that the LDAP URL is
- *
- * ldap://ldap.airius.com/ou=People, o=Airius?uid??(posixid=*)
- *
- * Further, assume that the userid passed by the client was `userj'. The
- * search filter will be (&(posixid=*)(uid=userj)).
- */
-#define FILTER_LENGTH MAX_STRING_LEN
-void mod_auth_ldap_build_filter(char *filtbuf,
- request_rec *r,
- mod_auth_ldap_config_t *sec)
-{
- char *p, *q, *filtbuf_end;
- char *user;
- apr_xlate_t *convset = NULL;
- apr_size_t inbytes;
- apr_size_t outbytes;
- char *outbuf;
-
- if (r->user != NULL) {
- user = apr_pstrdup (r->pool, r->user);
- }
- else
- return;
-
- if (charset_conversions) {
- convset = get_conv_set(r);
- }
-
- if (convset) {
- inbytes = strlen(user);
- outbytes = (inbytes+1)*3;
- outbuf = apr_pcalloc(r->pool, outbytes);
-
- /* Convert the user name to UTF-8. This is only valid for LDAP v3 */
- if (apr_xlate_conv_buffer(convset, user, &inbytes, outbuf, &outbytes) == APR_SUCCESS) {
- user = apr_pstrdup(r->pool, outbuf);
- }
- }
-
- /*
- * Create the first part of the filter, which consists of the
- * config-supplied portions.
- */
- apr_snprintf(filtbuf, FILTER_LENGTH, "(&(%s)(%s=", sec->filter, sec->attribute);
-
- /*
- * Now add the client-supplied username to the filter, ensuring that any
- * LDAP filter metachars are escaped.
- */
- filtbuf_end = filtbuf + FILTER_LENGTH - 1;
- for (p = user, q=filtbuf + strlen(filtbuf);
- *p && q < filtbuf_end; *q++ = *p++) {
-#if APR_HAS_MICROSOFT_LDAPSDK
- /* Note: The Microsoft SDK escapes for us, so is not necessary */
-#else
- if (strchr("*()\\", *p) != NULL) {
- *q++ = '\\';
- if (q >= filtbuf_end) {
- break;
- }
- }
-#endif
- }
- *q = '\0';
-
- /*
- * Append the closing parens of the filter, unless doing so would
- * overrun the buffer.
- */
- if (q + 2 <= filtbuf_end)
- strcat(filtbuf, "))");
-}
-
-static apr_status_t mod_auth_ldap_cleanup_connection_close(void *param)
-{
- util_ldap_connection_t *ldc = param;
- util_ldap_connection_close(ldc);
- return APR_SUCCESS;
-}
-
-
-/*
- * Authentication Phase
- * --------------------
- *
- * This phase authenticates the credentials the user has sent with
- * the request (ie the username and password are checked). This is done
- * by making an attempt to bind to the LDAP server using this user's
- * DN and the supplied password.
- *
- */
-int mod_auth_ldap_check_user_id(request_rec *r)
-{
- int failures = 0;
- const char **vals = NULL;
- char filtbuf[FILTER_LENGTH];
- mod_auth_ldap_config_t *sec =
- (mod_auth_ldap_config_t *)ap_get_module_config(r->per_dir_config, &auth_ldap_module);
-
- util_ldap_connection_t *ldc = NULL;
- const char *sent_pw;
- int result = 0;
- const char *dn = NULL;
-
- mod_auth_ldap_request_t *req =
- (mod_auth_ldap_request_t *)apr_pcalloc(r->pool, sizeof(mod_auth_ldap_request_t));
- ap_set_module_config(r->request_config, &auth_ldap_module, req);
-
- if (!sec->enabled) {
- return DECLINED;
- }
-
- /*
- * Basic sanity checks before any LDAP operations even happen.
- */
- if (!sec->have_ldap_url) {
- return DECLINED;
- }
-
-start_over:
-
- /* There is a good AuthLDAPURL, right? */
- if (sec->host) {
- ldc = util_ldap_connection_find(r, sec->host, sec->port,
- sec->binddn, sec->bindpw, sec->deref,
- sec->secure);
- }
- else {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: no sec->host - weird...?", getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
-
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: using URL %s", getpid(), sec->url);
-
- /* Get the password that the client sent */
- if ((result = ap_get_basic_auth_pw(r, &sent_pw))) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: "
- "ap_get_basic_auth_pw() returns %d", getpid(), result);
- util_ldap_connection_close(ldc);
- return result;
- }
-
- if (r->user == NULL) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: no user specified", getpid());
- util_ldap_connection_close(ldc);
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
-
- /* build the username filter */
- mod_auth_ldap_build_filter(filtbuf, r, sec);
-
- /* do the user search */
- result = util_ldap_cache_checkuserid(r, ldc, sec->url, sec->basedn, sec->scope,
- sec->attributes, filtbuf, sent_pw, &dn, &vals);
- util_ldap_connection_close(ldc);
-
- /* sanity check - if server is down, retry it up to 5 times */
- if (result == LDAP_SERVER_DOWN) {
- if (failures++ <= 5) {
- goto start_over;
- }
- }
-
- /* handle bind failure */
- if (result != LDAP_SUCCESS) {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: "
- "user %s authentication failed; URI %s [%s][%s]",
- getpid(), r->user, r->uri, ldc->reason, ldap_err2string(result));
- if ((LDAP_INVALID_CREDENTIALS == result) || sec->auth_authoritative) {
- ap_note_basic_auth_failure(r);
- return HTTP_UNAUTHORIZED;
- }
- else {
- return DECLINED;
- }
- }
-
- /* mark the user and DN */
- req->dn = apr_pstrdup(r->pool, dn);
- req->user = r->user;
- if (sec->user_is_dn) {
- r->user = req->dn;
- }
-
- /* add environment variables */
- if (sec->attributes && vals) {
- apr_table_t *e = r->subprocess_env;
- int i = 0;
- while (sec->attributes[i]) {
- char *str = apr_pstrcat(r->pool, "AUTHENTICATE_", sec->attributes[i], NULL);
- int j = 13;
- while (str[j]) {
- if (str[j] >= 'a' && str[j] <= 'z') {
- str[j] = str[j] - ('a' - 'A');
- }
- j++;
- }
- apr_table_setn(e, str, vals[i]);
- i++;
- }
- }
-
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authenticate: accepting %s", getpid(), r->user);
-
- return OK;
-}
-
-
-/*
- * Authorisation Phase
- * -------------------
- *
- * After checking whether the username and password are correct, we need
- * to check whether that user is authorised to view this resource. The
- * require directive is used to do this:
- *
- * require valid-user Any authenticated is allowed in.
- * require user <username> This particular user is allowed in.
- * require group <groupname> The user must be a member of this group
- * in order to be allowed in.
- * require dn <dn> The user must have the following DN in the
- * LDAP tree to be let in.
- *
- */
-int mod_auth_ldap_auth_checker(request_rec *r)
-{
- int result = 0;
- mod_auth_ldap_request_t *req =
- (mod_auth_ldap_request_t *)ap_get_module_config(r->request_config,
- &auth_ldap_module);
- mod_auth_ldap_config_t *sec =
- (mod_auth_ldap_config_t *)ap_get_module_config(r->per_dir_config,
- &auth_ldap_module);
-
- util_ldap_connection_t *ldc = NULL;
- int m = r->method_number;
-
- const apr_array_header_t *reqs_arr = ap_requires(r);
- require_line *reqs = reqs_arr ? (require_line *)reqs_arr->elts : NULL;
-
- register int x;
- const char *t;
- char *w;
- int method_restricted = 0;
-
- if (!sec->enabled) {
- return DECLINED;
- }
-
- if (!sec->have_ldap_url) {
- return DECLINED;
- }
-
- if (sec->host) {
- ldc = util_ldap_connection_find(r, sec->host, sec->port,
- sec->binddn, sec->bindpw, sec->deref,
- sec->secure);
- apr_pool_cleanup_register(r->pool, ldc,
- mod_auth_ldap_cleanup_connection_close,
- apr_pool_cleanup_null);
- }
- else {
- ap_log_rerror(APLOG_MARK, APLOG_WARNING|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: no sec->host - weird...?", getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
-
- /*
- * If there are no elements in the group attribute array, the default should be
- * member and uniquemember; populate the array now.
- */
- if (sec->groupattr->nelts == 0) {
- struct mod_auth_ldap_groupattr_entry_t *grp;
-#if APR_HAS_THREADS
- apr_thread_mutex_lock(sec->lock);
-#endif
- grp = apr_array_push(sec->groupattr);
- grp->name = "member";
- grp = apr_array_push(sec->groupattr);
- grp->name = "uniquemember";
-#if APR_HAS_THREADS
- apr_thread_mutex_unlock(sec->lock);
-#endif
- }
-
- if (!reqs_arr) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: no requirements array", getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
-
- /* Loop through the requirements array until there's no elements
- * left, or something causes a return from inside the loop */
- for(x=0; x < reqs_arr->nelts; x++) {
- if (! (reqs[x].method_mask & (1 << m))) {
- continue;
- }
- method_restricted = 1;
-
- t = reqs[x].requirement;
- w = ap_getword_white(r->pool, &t);
-
- if (strcmp(w, "valid-user") == 0) {
- /*
- * Valid user will always be true if we authenticated with ldap,
- * but when using front page, valid user should only be true if
- * he exists in the frontpage password file. This hack will get
- * auth_ldap to look up the user in the the pw file to really be
- * sure that he's valid. Naturally, it requires mod_auth to be
- * compiled in, but if mod_auth wasn't in there, then the need
- * for this hack wouldn't exist anyway.
- */
- if (sec->frontpage_hack) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "deferring authorisation to mod_auth (FP Hack)",
- getpid());
- return OK;
- }
- else {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "successful authorisation because user "
- "is valid-user", getpid());
- return OK;
- }
- }
- else if (strcmp(w, "user") == 0) {
- if (req->dn == NULL || strlen(req->dn) == 0) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require user: user's DN has not been defined; failing authorisation",
- getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
- /*
- * First do a whole-line compare, in case it's something like
- * require user Babs Jensen
- */
- result = util_ldap_cache_compare(r, ldc, sec->url, req->dn, sec->attribute, t);
- switch(result) {
- case LDAP_COMPARE_TRUE: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require user: authorisation successful", getpid());
- return OK;
- }
- default: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require user: "
- "authorisation failed [%s][%s]", getpid(),
- ldc->reason, ldap_err2string(result));
- }
- }
- /*
- * Now break apart the line and compare each word on it
- */
- while (t[0]) {
- w = ap_getword_conf(r->pool, &t);
- result = util_ldap_cache_compare(r, ldc, sec->url, req->dn, sec->attribute, w);
- switch(result) {
- case LDAP_COMPARE_TRUE: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require user: authorisation successful", getpid());
- return OK;
- }
- default: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require user: authorisation failed [%s][%s]",
- getpid(), ldc->reason, ldap_err2string(result));
- }
- }
- }
- }
- else if (strcmp(w, "dn") == 0) {
- if (req->dn == NULL || strlen(req->dn) == 0) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require dn: user's DN has not been defined; failing authorisation",
- getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
-
- result = util_ldap_cache_comparedn(r, ldc, sec->url, req->dn, t, sec->compare_dn_on_server);
- switch(result) {
- case LDAP_COMPARE_TRUE: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require dn: authorisation successful", getpid());
- return OK;
- }
- default: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: "
- "require dn \"%s\": LDAP error [%s][%s]",
- getpid(), t, ldc->reason, ldap_err2string(result));
- }
- }
- }
- else if (strcmp(w, "group") == 0) {
- struct mod_auth_ldap_groupattr_entry_t *ent = (struct mod_auth_ldap_groupattr_entry_t *) sec->groupattr->elts;
- int i;
-
- if (sec->group_attrib_is_dn) {
- if (req->dn == NULL || strlen(req->dn) == 0) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require group: user's DN has not been defined; failing authorisation",
- getpid());
- return sec->auth_authoritative? HTTP_UNAUTHORIZED : DECLINED;
- }
- }
- else {
- if (req->user == NULL || strlen(req->user) == 0) {
- /* We weren't called in the authentication phase, so we didn't have a
- * chance to set the user field. Do so now. */
- req->user = r->user;
- }
- }
-
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require group: testing for group membership in \"%s\"",
- getpid(), t);
-
- for (i = 0; i < sec->groupattr->nelts; i++) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require group: testing for %s: %s (%s)", getpid(),
- ent[i].name, sec->group_attrib_is_dn ? req->dn : req->user, t);
-
- result = util_ldap_cache_compare(r, ldc, sec->url, t, ent[i].name,
- sec->group_attrib_is_dn ? req->dn : req->user);
- switch(result) {
- case LDAP_COMPARE_TRUE: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require group: "
- "authorisation successful (attribute %s) [%s][%s]",
- getpid(), ent[i].name, ldc->reason, ldap_err2string(result));
- return OK;
- }
- default: {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: require group \"%s\": "
- "authorisation failed [%s][%s]",
- getpid(), t, ldc->reason, ldap_err2string(result));
- }
- }
- }
- }
- }
-
- if (!method_restricted) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: agreeing because non-restricted",
- getpid());
- return OK;
- }
-
- if (!sec->auth_authoritative) {
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: declining to authorise", getpid());
- return DECLINED;
- }
-
- ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
- "[%d] auth_ldap authorise: authorisation denied", getpid());
- ap_note_basic_auth_failure (r);
-
- return HTTP_UNAUTHORIZED;
-}
-
-
-/* ---------------------------------------- */
-/* config directives */
-
-
-void *mod_auth_ldap_create_dir_config(apr_pool_t *p, char *d)
-{
- mod_auth_ldap_config_t *sec =
- (mod_auth_ldap_config_t *)apr_pcalloc(p, sizeof(mod_auth_ldap_config_t));
-
- sec->pool = p;
-#if APR_HAS_THREADS
- apr_thread_mutex_create(&sec->lock, APR_THREAD_MUTEX_DEFAULT, p);
-#endif
- sec->auth_authoritative = 1;
- sec->enabled = 1;
- sec->groupattr = apr_array_make(p, GROUPATTR_MAX_ELTS,
- sizeof(struct mod_auth_ldap_groupattr_entry_t));
-
- sec->have_ldap_url = 0;
- sec->url = "";
- sec->host = NULL;
- sec->binddn = NULL;
- sec->bindpw = NULL;
- sec->deref = always;
- sec->group_attrib_is_dn = 1;
-
- sec->frontpage_hack = 0;
- sec->secure = 0;
-
- sec->user_is_dn = 0;
- sec->compare_dn_on_server = 0;
-
- return sec;
-}
-
-/*
- * Use the ldap url parsing routines to break up the ldap url into
- * host and port.
- */
-static const char *mod_auth_ldap_parse_url(cmd_parms *cmd,
- void *config,
- const char *url)
-{
- int rc;
- apr_ldap_url_desc_t *urld;
- apr_ldap_err_t *result;
-
- mod_auth_ldap_config_t *sec = config;
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: `%s'",
- getpid(), url);
-
- rc = apr_ldap_url_parse(cmd->pool, url, &(urld), &(result));
- if (rc != APR_SUCCESS) {
- return result->reason;
- }
- sec->url = apr_pstrdup(cmd->pool, url);
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: Host: %s", getpid(), urld->lud_host);
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: Port: %d", getpid(), urld->lud_port);
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: DN: %s", getpid(), urld->lud_dn);
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: attrib: %s", getpid(), urld->lud_attrs? urld->lud_attrs[0] : "(null)");
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: scope: %s", getpid(),
- (urld->lud_scope == LDAP_SCOPE_SUBTREE? "subtree" :
- urld->lud_scope == LDAP_SCOPE_BASE? "base" :
- urld->lud_scope == LDAP_SCOPE_ONELEVEL? "onelevel" : "unknown"));
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0,
- cmd->server, "[%d] auth_ldap url parse: filter: %s", getpid(), urld->lud_filter);
-
- /* Set all the values, or at least some sane defaults */
- if (sec->host) {
- char *p = apr_palloc(cmd->pool, strlen(sec->host) + strlen(urld->lud_host) + 2);
- strcpy(p, urld->lud_host);
- strcat(p, " ");
- strcat(p, sec->host);
- sec->host = p;
- }
- else {
- sec->host = urld->lud_host? apr_pstrdup(cmd->pool, urld->lud_host) : "localhost";
- }
- sec->basedn = urld->lud_dn? apr_pstrdup(cmd->pool, urld->lud_dn) : "";
- if (urld->lud_attrs && urld->lud_attrs[0]) {
- int i = 1;
- while (urld->lud_attrs[i]) {
- i++;
- }
- sec->attributes = apr_pcalloc(cmd->pool, sizeof(char *) * (i+1));
- i = 0;
- while (urld->lud_attrs[i]) {
- sec->attributes[i] = apr_pstrdup(cmd->pool, urld->lud_attrs[i]);
- i++;
- }
- sec->attribute = sec->attributes[0];
- }
- else {
- sec->attribute = "uid";
- }
-
- sec->scope = urld->lud_scope == LDAP_SCOPE_ONELEVEL ?
- LDAP_SCOPE_ONELEVEL : LDAP_SCOPE_SUBTREE;
-
- if (urld->lud_filter) {
- if (urld->lud_filter[0] == '(') {
- /*
- * Get rid of the surrounding parens; later on when generating the
- * filter, they'll be put back.
- */
- sec->filter = apr_pstrdup(cmd->pool, urld->lud_filter+1);
- sec->filter[strlen(sec->filter)-1] = '\0';
- }
- else {
- sec->filter = apr_pstrdup(cmd->pool, urld->lud_filter);
- }
- }
- else {
- sec->filter = "objectclass=*";
- }
-
- /* "ldaps" indicates secure ldap connections desired
- */
- if (strncasecmp(url, "ldaps", 5) == 0)
- {
- sec->secure = 1;
- sec->port = urld->lud_port? urld->lud_port : LDAPS_PORT;
- ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, cmd->server,
- "LDAP: auth_ldap using SSL connections");
- }
- else
- {
- sec->secure = 0;
- sec->port = urld->lud_port? urld->lud_port : LDAP_PORT;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server,
- "LDAP: auth_ldap not using SSL connections");
- }
-
- sec->have_ldap_url = 1;
- return NULL;
-}
-
-static const char *mod_auth_ldap_set_deref(cmd_parms *cmd, void *config, const char *arg)
-{
- mod_auth_ldap_config_t *sec = config;
-
- if (strcmp(arg, "never") == 0 || strcasecmp(arg, "off") == 0) {
- sec->deref = never;
- }
- else if (strcmp(arg, "searching") == 0) {
- sec->deref = searching;
- }
- else if (strcmp(arg, "finding") == 0) {
- sec->deref = finding;
- }
- else if (strcmp(arg, "always") == 0 || strcasecmp(arg, "on") == 0) {
- sec->deref = always;
- }
- else {
- return "Unrecognized value for AuthLDAPAliasDereference directive";
- }
- return NULL;
-}
-
-static const char *mod_auth_ldap_add_group_attribute(cmd_parms *cmd, void *config, const char *arg)
-{
- struct mod_auth_ldap_groupattr_entry_t *new;
-
- mod_auth_ldap_config_t *sec = config;
-
- if (sec->groupattr->nelts > GROUPATTR_MAX_ELTS)
- return "Too many AuthLDAPGroupAttribute directives";
-
- new = apr_array_push(sec->groupattr);
- new->name = apr_pstrdup(cmd->pool, arg);
-
- return NULL;
-}
-
-static const char *set_charset_config(cmd_parms *cmd, void *config, const char *arg)
-{
- ap_set_module_config(cmd->server->module_config, &auth_ldap_module,
- (void *)arg);
- return NULL;
-}
-
-
-command_rec mod_auth_ldap_cmds[] = {
- AP_INIT_TAKE1("AuthLDAPURL", mod_auth_ldap_parse_url, NULL, OR_AUTHCFG,
- "URL to define LDAP connection. This should be an RFC 2255 complaint\n"
- "URL of the form ldap://host[:port]/basedn[?attrib[?scope[?filter]]].\n"
- "<ul>\n"
- "<li>Host is the name of the LDAP server. Use a space separated list of hosts \n"
- "to specify redundant servers.\n"
- "<li>Port is optional, and specifies the port to connect to.\n"
- "<li>basedn specifies the base DN to start searches from\n"
- "<li>Attrib specifies what attribute to search for in the directory. If not "
- "provided, it defaults to <b>uid</b>.\n"
- "<li>Scope is the scope of the search, and can be either <b>sub</b> or "
- "<b>one</b>. If not provided, the default is <b>sub</b>.\n"
- "<li>Filter is a filter to use in the search. If not provided, "
- "defaults to <b>(objectClass=*)</b>.\n"
- "</ul>\n"
- "Searches are performed using the attribute and the filter combined. "
- "For example, assume that the\n"
- "LDAP URL is <b>ldap://ldap.airius.com/ou=People, o=Airius?uid?sub?(posixid=*)</b>. "
- "Searches will\n"
- "be done using the filter <b>(&((posixid=*))(uid=<i>username</i>))</b>, "
- "where <i>username</i>\n"
- "is the user name passed by the HTTP client. The search will be a subtree "
- "search on the branch <b>ou=People, o=Airius</b>."),
-
- AP_INIT_TAKE1("AuthLDAPBindDN", ap_set_string_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, binddn), OR_AUTHCFG,
- "DN to use to bind to LDAP server. If not provided, will do an anonymous bind."),
-
- AP_INIT_TAKE1("AuthLDAPBindPassword", ap_set_string_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, bindpw), OR_AUTHCFG,
- "Password to use to bind to LDAP server. If not provided, will do an anonymous bind."),
-
- AP_INIT_FLAG("AuthLDAPRemoteUserIsDN", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, user_is_dn), OR_AUTHCFG,
- "Set to 'on' to set the REMOTE_USER environment variable to be the full "
- "DN of the remote user. By default, this is set to off, meaning that "
- "the REMOTE_USER variable will contain whatever value the remote user sent."),
-
- AP_INIT_FLAG("AuthLDAPAuthoritative", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, auth_authoritative), OR_AUTHCFG,
- "Set to 'off' to allow access control to be passed along to lower modules if "
- "the UserID and/or group is not known to this module"),
-
- AP_INIT_FLAG("AuthLDAPCompareDNOnServer", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, compare_dn_on_server), OR_AUTHCFG,
- "Set to 'on' to force auth_ldap to do DN compares (for the \"require dn\" "
- "directive) using the server, and set it 'off' to do the compares locally "
- "(at the expense of possible false matches). See the documentation for "
- "a complete description of this option."),
-
- AP_INIT_ITERATE("AuthLDAPGroupAttribute", mod_auth_ldap_add_group_attribute, NULL, OR_AUTHCFG,
- "A list of attributes used to define group membership - defaults to "
- "member and uniquemember"),
-
- AP_INIT_FLAG("AuthLDAPGroupAttributeIsDN", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, group_attrib_is_dn), OR_AUTHCFG,
- "If set to 'on', auth_ldap uses the DN that is retrieved from the server for"
- "subsequent group comparisons. If set to 'off', auth_ldap uses the string"
- "provided by the client directly. Defaults to 'on'."),
-
- AP_INIT_TAKE1("AuthLDAPDereferenceAliases", mod_auth_ldap_set_deref, NULL, OR_AUTHCFG,
- "Determines how aliases are handled during a search. Can bo one of the"
- "values \"never\", \"searching\", \"finding\", or \"always\". "
- "Defaults to always."),
-
- AP_INIT_FLAG("AuthLDAPEnabled", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, enabled), OR_AUTHCFG,
- "Set to off to disable auth_ldap, even if it's been enabled in a higher tree"),
-
- AP_INIT_FLAG("AuthLDAPFrontPageHack", ap_set_flag_slot,
- (void *)APR_OFFSETOF(mod_auth_ldap_config_t, frontpage_hack), OR_AUTHCFG,
- "Set to 'on' to support Microsoft FrontPage"),
-
- AP_INIT_TAKE1("AuthLDAPCharsetConfig", set_charset_config, NULL, RSRC_CONF,
- "Character set conversion configuration file. If omitted, character set"
- "conversion is disabled."),
-
- {NULL}
-};
-
-static int auth_ldap_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
-{
- ap_configfile_t *f;
- char l[MAX_STRING_LEN];
- const char *charset_confname = ap_get_module_config(s->module_config,
- &auth_ldap_module);
- apr_status_t status;
-
- /*
- mod_auth_ldap_config_t *sec = (mod_auth_ldap_config_t *)
- ap_get_module_config(s->module_config,
- &auth_ldap_module);
-
- if (sec->secure)
- {
- if (!util_ldap_ssl_supported(s))
- {
- ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s,
- "LDAP: SSL connections (ldaps://) not supported by utilLDAP");
- return(!OK);
- }
- }
- */
-
- /* make sure that mod_ldap (util_ldap) is loaded */
- if (ap_find_linked_module("util_ldap.c") == NULL) {
- ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, s,
- "Module mod_ldap missing. Mod_ldap (aka. util_ldap) "
- "must be loaded in order for mod_auth_ldap to function properly");
- return HTTP_INTERNAL_SERVER_ERROR;
-
- }
-
- if (!charset_confname) {
- return OK;
- }
-
- charset_confname = ap_server_root_relative(p, charset_confname);
- if (!charset_confname) {
- ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
- "Invalid charset conversion config path %s",
- (const char *)ap_get_module_config(s->module_config,
- &auth_ldap_module));
- return HTTP_INTERNAL_SERVER_ERROR;
- }
- if ((status = ap_pcfg_openfile(&f, ptemp, charset_confname))
- != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, s,
- "could not open charset conversion config file %s.",
- charset_confname);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- charset_conversions = apr_hash_make(p);
-
- while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
- const char *ll = l;
- char *lang;
-
- if (l[0] == '#') {
- continue;
- }
- lang = ap_getword_conf(p, &ll);
- ap_str_tolower(lang);
-
- if (ll[0]) {
- char *charset = ap_getword_conf(p, &ll);
- apr_hash_set(charset_conversions, lang, APR_HASH_KEY_STRING, charset);
- }
- }
- ap_cfg_closefile(f);
-
- to_charset = derive_codepage_from_lang (p, "utf-8");
- if (to_charset == NULL) {
- ap_log_error(APLOG_MARK, APLOG_ERR, status, s,
- "could not find the UTF-8 charset in the file %s.",
- charset_confname);
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- return OK;
-}
-
-static void mod_auth_ldap_register_hooks(apr_pool_t *p)
-{
- ap_hook_post_config(auth_ldap_post_config,NULL,NULL,APR_HOOK_MIDDLE);
- ap_hook_check_user_id(mod_auth_ldap_check_user_id, NULL, NULL, APR_HOOK_MIDDLE);
- ap_hook_auth_checker(mod_auth_ldap_auth_checker, NULL, NULL, APR_HOOK_MIDDLE);
-}
-
-module auth_ldap_module = {
- STANDARD20_MODULE_STUFF,
- mod_auth_ldap_create_dir_config, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- NULL, /* server config */
- NULL, /* merge server config */
- mod_auth_ldap_cmds, /* command table */
- mod_auth_ldap_register_hooks, /* set up request processing hooks */
-};
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