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apache / httpd / ad0cbd766acc7a31cff9ac75beb2c38a6ab79f84 / . / modules / aaa / mod_authnz_ldap.c
blob: 2de813f69eae138096db0e2b0d9710b0645013ee [file] [log] [blame]
/* 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.
*/
#include "ap_provider.h"
#include "httpd.h"
#include "http_config.h"
#include "ap_provider.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
#include "http_request.h"
#include "util_ldap.h"
#include "mod_auth.h"
#include "apr_strings.h"
#include "apr_xlate.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "apr_lib.h"
#include <ctype.h>
#if !APR_HAS_LDAP
#error mod_authnz_ldap requires APR-util to have LDAP support built in. To fix add --with-ldap to ./configure.
#endif
static char *default_attributes[3] = { "member", "uniqueMember", NULL };
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
/* 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 bind_authoritative; /* If true, will return errors when bind fails */
int user_is_dn; /* If true, r->user is replaced by DN during authn */
char *remote_user_attribute; /* If set, r->user is replaced by this attribute during authn */
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 identifying user members. Default:"member uniqueMember" */
int group_attrib_is_dn; /* If true, the group attribute is the DN, otherwise,
it's the exact string passed by the HTTP client */
char **sgAttributes; /* Array of strings constructed (post-config) from subgroupattrs. Last entry is NULL. */
apr_array_header_t *subgroupclasses; /* List of object classes of sub-groups. Default:"groupOfNames groupOfUniqueNames" */
int maxNestingDepth; /* Maximum recursive nesting depth permitted during subgroup processing. Default: 10 */
int secure; /* True if SSL connections are requested */
char *authz_prefix; /* Prefix for environment variables added during authz */
int initial_bind_as_user; /* true if we should try to bind (to lookup DN) directly with the basic auth username */
ap_regex_t *bind_regex; /* basic auth -> bind'able username regex */
const char *bind_subst; /* basic auth -> bind'able username substitution */
int search_as_user; /* true if authz searches should be done with the users credentials (when we did authn) */
int compare_as_user; /* true if authz compares should be done with the users credentials (when we did authn) */
} authn_ldap_config_t;
typedef struct {
char *dn; /* The saved dn from a successful search */
char *user; /* The username provided by the client */
const char **vals; /* The additional values pulled during the DN search*/
char *password; /* if this module successfully authenticates, the basic auth password, else null */
apr_pool_t *ldc_pool; /* a short-lived pool to trigger cleanups on any acquired LDCs */
} authn_ldap_request_t;
enum auth_ldap_phase {
LDAP_AUTHN, LDAP_AUTHZ
};
enum auth_ldap_optype {
LDAP_SEARCH, LDAP_COMPARE, LDAP_COMPARE_AND_SEARCH /* nested groups */
};
/* maximum group elements supported */
#define GROUPATTR_MAX_ELTS 10
module AP_MODULE_DECLARE_DATA authnz_ldap_module;
static APR_OPTIONAL_FN_TYPE(uldap_connection_close) *util_ldap_connection_close;
static APR_OPTIONAL_FN_TYPE(uldap_connection_find) *util_ldap_connection_find;
static APR_OPTIONAL_FN_TYPE(uldap_cache_comparedn) *util_ldap_cache_comparedn;
static APR_OPTIONAL_FN_TYPE(uldap_cache_compare) *util_ldap_cache_compare;
static APR_OPTIONAL_FN_TYPE(uldap_cache_check_subgroups) *util_ldap_cache_check_subgroups;
static APR_OPTIONAL_FN_TYPE(uldap_cache_checkuserid) *util_ldap_cache_checkuserid;
static APR_OPTIONAL_FN_TYPE(uldap_cache_getuserdn) *util_ldap_cache_getuserdn;
static APR_OPTIONAL_FN_TYPE(uldap_ssl_supported) *util_ldap_ssl_supported;
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)
{
char *charset;
if (!language) /* our default codepage */
return apr_pstrdup(p, "ISO-8859-1");
charset = (char*) apr_hash_get(charset_conversions, language, APR_HASH_KEY_STRING);
/*
* Test if language values like 'en-US' return a match from the charset
* conversion map when shortened to 'en'.
*/
if (!charset && strlen(language) > 3 && language[2] == '-') {
char *language_short = apr_pstrndup(p, language, 2);
charset = (char*) apr_hash_get(charset_conversions, language_short, 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;
}
static const char* authn_ldap_xlate_password(request_rec *r,
const char* sent_password)
{
apr_xlate_t *convset = NULL;
apr_size_t inbytes;
apr_size_t outbytes;
char *outbuf;
if (charset_conversions && (convset = get_conv_set(r)) ) {
inbytes = strlen(sent_password);
outbytes = (inbytes+1)*3;
outbuf = apr_pcalloc(r->pool, outbytes);
/* Convert the password to UTF-8. */
if (apr_xlate_conv_buffer(convset, sent_password, &inbytes, outbuf,
&outbytes) == APR_SUCCESS)
return outbuf;
}
return sent_password;
}
/*
* Build the search filter, or at least as much of the search filter that
* will fit in the buffer, and return APR_EGENERAL if it won't fit, otherwise
* APR_SUCCESS.
*
* 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
static apr_status_t authn_ldap_build_filter(char *filtbuf,
request_rec *r,
const char *user,
const char *filter,
authn_ldap_config_t *sec)
{
char *q;
const char *p, *filtbuf_end;
apr_xlate_t *convset = NULL;
apr_size_t inbytes;
apr_size_t outbytes;
char *outbuf;
int nofilter = 0, len;
if (!filter) {
filter = sec->filter;
}
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 = outbuf;
}
}
/*
* Create the first part of the filter, which consists of the
* config-supplied portions.
*/
if ((nofilter = (filter && !strcasecmp(filter, "none")))) {
len = apr_snprintf(filtbuf, FILTER_LENGTH, "(%s=", sec->attribute);
}
else {
len = apr_snprintf(filtbuf, FILTER_LENGTH, "(&(%s)(%s=", 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;
#if APR_HAS_MICROSOFT_LDAPSDK
for (p = user, q=filtbuf + len;
*p && q < filtbuf_end; ) {
if (strchr("*()\\", *p) != NULL) {
if ( q + 3 >= filtbuf_end)
break; /* Don't write part of escape sequence if we can't write all of it */
*q++ = '\\';
switch ( *p++ )
{
case '*':
*q++ = '2';
*q++ = 'a';
break;
case '(':
*q++ = '2';
*q++ = '8';
break;
case ')':
*q++ = '2';
*q++ = '9';
break;
case '\\':
*q++ = '5';
*q++ = 'c';
break;
}
}
else
*q++ = *p++;
}
#else
for (p = user, q=filtbuf + len;
*p && q < filtbuf_end; *q++ = *p++) {
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 (nofilter) {
if (q + 1 <= filtbuf_end) {
strcat(filtbuf, ")");
}
else {
return APR_EGENERAL;
}
}
else {
if (q + 2 <= filtbuf_end) {
strcat(filtbuf, "))");
}
else {
return APR_EGENERAL;
}
}
return APR_SUCCESS;
}
static void *create_authnz_ldap_dir_config(apr_pool_t *p, char *d)
{
authn_ldap_config_t *sec =
(authn_ldap_config_t *)apr_pcalloc(p, sizeof(authn_ldap_config_t));
sec->pool = p;
#if APR_HAS_THREADS
apr_thread_mutex_create(&sec->lock, APR_THREAD_MUTEX_DEFAULT, p);
#endif
/*
sec->authz_enabled = 1;
*/
sec->groupattr = apr_array_make(p, GROUPATTR_MAX_ELTS,
sizeof(struct mod_auth_ldap_groupattr_entry_t));
sec->subgroupclasses = 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->bind_authoritative = 1;
sec->deref = always;
sec->group_attrib_is_dn = 1;
sec->secure = -1; /*Initialize to unset*/
sec->maxNestingDepth = 0;
sec->sgAttributes = apr_pcalloc(p, sizeof (char *) * GROUPATTR_MAX_ELTS + 1);
sec->user_is_dn = 0;
sec->remote_user_attribute = NULL;
sec->compare_dn_on_server = 0;
sec->authz_prefix = AUTHZ_PREFIX;
return sec;
}
static apr_status_t authnz_ldap_cleanup_connection_close(void *param)
{
util_ldap_connection_t *ldc = param;
ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, ldc->r, "Release ldc %pp", ldc);
util_ldap_connection_close(ldc);
return APR_SUCCESS;
}
static int set_request_vars(request_rec *r, enum auth_ldap_phase phase, const char **vals)
{
char *prefix = NULL;
int prefix_len;
int remote_user_attribute_set = 0;
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
prefix = (phase == LDAP_AUTHN) ? AUTHN_PREFIX : sec->authz_prefix;
prefix_len = strlen(prefix);
if (sec->attributes && vals) {
apr_table_t *e = r->subprocess_env;
int i = 0;
while (sec->attributes[i]) {
char *str = apr_pstrcat(r->pool, prefix, sec->attributes[i], NULL);
int j = prefix_len;
while (str[j]) {
str[j] = apr_toupper(str[j]);
j++;
}
apr_table_setn(e, str, vals[i] ? vals[i] : "");
/* handle remote_user_attribute, if set */
if ((phase == LDAP_AUTHN) &&
sec->remote_user_attribute &&
!strcmp(sec->remote_user_attribute, sec->attributes[i])) {
r->user = (char *)apr_pstrdup(r->pool, vals[i]);
remote_user_attribute_set = 1;
}
i++;
}
}
return remote_user_attribute_set;
}
static const char *ldap_determine_binddn(request_rec *r, const char *user)
{
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
const char *result = user;
ap_regmatch_t regm[AP_MAX_REG_MATCH];
if (NULL == user || NULL == sec || !sec->bind_regex || !sec->bind_subst) {
return result;
}
if (!ap_regexec(sec->bind_regex, user, AP_MAX_REG_MATCH, regm, 0)) {
char *substituted = ap_pregsub(r->pool, sec->bind_subst, user, AP_MAX_REG_MATCH, regm);
if (NULL != substituted) {
result = substituted;
}
}
apr_table_set(r->subprocess_env, "LDAP_BINDASUSER", result);
return result;
}
/**
* Some LDAP servers restrict who can search or compare, and the hard-coded ID
* might be good for the DN lookup but not for later operations.
* Requires the per-request config be set to ensure the connection is cleaned up
*/
static util_ldap_connection_t *get_connection_for_authz(request_rec *r, enum auth_ldap_optype type)
{
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
char *binddn = sec->binddn;
char *bindpw = sec->bindpw;
if (!req) {
ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(02659)
"module error: get_connection_for_authz without "
"per-request config");
return NULL;
}
/* If the password isn't set in the per-request config, we didn't
* authenticate this user, and leave the default credentials */
if (req->password &&
((type == LDAP_SEARCH && sec->search_as_user) ||
(type == LDAP_COMPARE && sec->compare_as_user) ||
(type == LDAP_COMPARE_AND_SEARCH && sec->compare_as_user && sec->search_as_user))) {
binddn = req->dn;
bindpw = req->password;
}
ldc = util_ldap_connection_find(r, sec->host, sec->port,
binddn, bindpw,
sec->deref, sec->secure);
ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, r, "Obtain ldc %pp for authz", ldc);
apr_pool_cleanup_register(req->ldc_pool, ldc,
authnz_ldap_cleanup_connection_close,
apr_pool_cleanup_null);
return ldc;
}
static authn_ldap_request_t* build_request_config(request_rec *r)
{
authn_ldap_request_t *req =
(authn_ldap_request_t *)apr_pcalloc(r->pool, sizeof(authn_ldap_request_t));
ap_set_module_config(r->request_config, &authnz_ldap_module, req);
apr_pool_create(&(req->ldc_pool), r->pool);
apr_pool_tag(req->ldc_pool, "authn_ldap_req_ldc");
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01740)
"ldap authorize: Creating LDAP req structure");
return req;
}
static void release_ldc(request_rec *r, util_ldap_connection_t *ldc)
{
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
if (req) {
apr_pool_cleanup_kill(req->ldc_pool, ldc, authnz_ldap_cleanup_connection_close);
}
authnz_ldap_cleanup_connection_close(ldc);
}
/*
* 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.
*
*/
static authn_status authn_ldap_check_password(request_rec *r, const char *user,
const char *password)
{
char filtbuf[FILTER_LENGTH];
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
authn_ldap_request_t *req = NULL;
int result = 0;
int remote_user_attribute_set = 0;
const char *dn = NULL;
const char *utfpassword;
/*
if (!sec->enabled) {
return AUTH_USER_NOT_FOUND;
}
*/
/*
* Basic sanity checks before any LDAP operations even happen.
*/
if (!sec->have_ldap_url) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02558)
"no AuthLDAPURL");
return AUTH_GENERAL_ERROR;
}
/* Get the password that the client sent */
if (password == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01692)
"auth_ldap authenticate: no password specified");
return AUTH_GENERAL_ERROR;
}
if (user == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01693)
"auth_ldap authenticate: no user specified");
return AUTH_GENERAL_ERROR;
}
/*
* 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 (!(*password)) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(10263)
"auth_ldap authenticate: empty password specified");
return AUTH_DENIED;
}
/* There is a good AuthLDAPURL, right? */
if (sec->host) {
const char *binddn = sec->binddn;
const char *bindpw = sec->bindpw;
if (sec->initial_bind_as_user) {
bindpw = password;
binddn = ldap_determine_binddn(r, user);
}
req = build_request_config(r);
ldc = util_ldap_connection_find(r, sec->host, sec->port,
binddn, bindpw,
sec->deref, sec->secure);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01690)
"auth_ldap authenticate: no sec->host - weird...?");
return AUTH_GENERAL_ERROR;
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01691)
"auth_ldap authenticate: using URL %s", sec->url);
/* build the username filter */
if (APR_SUCCESS != authn_ldap_build_filter(filtbuf, r, user, NULL, sec)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02622)
"auth_ldap authenticate: ldap filter too long (>%d): %s",
FILTER_LENGTH, filtbuf);
release_ldc(r, ldc);
return AUTH_GENERAL_ERROR;
}
ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r,
"auth_ldap authenticate: final authn filter is %s", filtbuf);
/* convert password to utf-8 */
utfpassword = authn_ldap_xlate_password(r, password);
/* do the user search */
result = util_ldap_cache_checkuserid(r, ldc, sec->url, sec->basedn, sec->scope,
sec->attributes, filtbuf, utfpassword,
&dn, &(req->vals));
release_ldc(r, ldc);
/* handle bind failure */
if (result != LDAP_SUCCESS) {
if (!sec->bind_authoritative) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01694)
"auth_ldap authenticate: user %s authentication failed; "
"URI %s [%s][%s] (not authoritative)",
user, r->uri, ldc->reason, ldap_err2string(result));
return AUTH_USER_NOT_FOUND;
}
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01695)
"auth_ldap authenticate: "
"user %s authentication failed; URI %s [%s][%s]",
user, r->uri, ldc->reason, ldap_err2string(result));
/* talking to a primitive LDAP server (like RACF-over-LDAP) that doesn't return specific errors */
if (!strcasecmp(sec->filter, "none") && LDAP_OTHER == result) {
return AUTH_USER_NOT_FOUND;
}
return (LDAP_NO_SUCH_OBJECT == result) ? AUTH_USER_NOT_FOUND
#ifdef LDAP_SECURITY_ERROR
: (LDAP_SECURITY_ERROR(result)) ? AUTH_DENIED
#else
: (LDAP_INAPPROPRIATE_AUTH == result) ? AUTH_DENIED
: (LDAP_INVALID_CREDENTIALS == result) ? AUTH_DENIED
#ifdef LDAP_INSUFFICIENT_ACCESS
: (LDAP_INSUFFICIENT_ACCESS == result) ? AUTH_DENIED
#endif
#ifdef LDAP_INSUFFICIENT_RIGHTS
: (LDAP_INSUFFICIENT_RIGHTS == result) ? AUTH_DENIED
#endif
#endif
#ifdef LDAP_CONSTRAINT_VIOLATION
/* At least Sun Directory Server sends this if a user is
* locked. This is not covered by LDAP_SECURITY_ERROR.
*/
: (LDAP_CONSTRAINT_VIOLATION == result) ? AUTH_DENIED
#endif
: AUTH_GENERAL_ERROR;
}
/* mark the user and DN */
req->dn = apr_pstrdup(r->pool, dn);
req->user = apr_pstrdup(r->pool, user);
req->password = apr_pstrdup(r->pool, password);
if (sec->user_is_dn) {
r->user = req->dn;
}
/* add environment variables */
remote_user_attribute_set = set_request_vars(r, LDAP_AUTHN, req->vals);
/* sanity check */
if (sec->remote_user_attribute && !remote_user_attribute_set) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01696)
"auth_ldap authenticate: "
"REMOTE_USER was to be set with attribute '%s', "
"but this attribute was not requested for in the "
"LDAP query for the user. REMOTE_USER will fall "
"back to username or DN as appropriate.",
sec->remote_user_attribute);
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01697)
"auth_ldap authenticate: accepting %s", user);
return AUTH_GRANTED;
}
static authz_status get_dn_for_nonldap_authn(request_rec *r, util_ldap_connection_t *ldc)
{
apr_status_t result = APR_SUCCESS;
char filtbuf[FILTER_LENGTH];
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
const char *dn = NULL;
int remote_user_attribute_set = 0;
/* Build the username filter */
if (APR_SUCCESS != authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02623)
"auth_ldap authorize: ldap filter too long (>%d): %s",
FILTER_LENGTH, filtbuf);
return AUTHZ_DENIED;
}
/* Search for the user DN */
result = util_ldap_cache_getuserdn(r, ldc, sec->url, sec->basedn,
sec->scope, sec->attributes, filtbuf, &dn, &(req->vals));
/* Search failed, log error and return failure */
if (result != LDAP_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01701)
"auth_ldap authorise: User DN not found, %s", ldc->reason);
return AUTHZ_DENIED;
}
req->dn = apr_pstrdup(r->pool, dn);
req->user = r->user;
/* add environment variables */
remote_user_attribute_set = set_request_vars(r, LDAP_AUTHN, req->vals);
/* sanity check */
if (sec->remote_user_attribute && !remote_user_attribute_set) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(10450)
"auth_ldap non-ldap authenticate: "
"REMOTE_USER was to be set with attribute '%s', "
"but this attribute was not requested for in the "
"LDAP query for the user. REMOTE_USER will fall "
"back to username or DN as appropriate.",
sec->remote_user_attribute);
}
return AUTHZ_GRANTED;
}
static authz_status ldapuser_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
char *w;
if (!r->user) {
return AUTHZ_DENIED_NO_USER;
}
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (!sec->host) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01698)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
if (!req) {
authz_status rv = AUTHZ_DENIED;
req = build_request_config(r);
ldc = get_connection_for_authz(r, LDAP_COMPARE);
if (AUTHZ_GRANTED != (rv = get_dn_for_nonldap_authn(r, ldc))) {
return rv;
}
}
else {
ldc = get_connection_for_authz(r, LDAP_COMPARE);
}
/*
* If we have been authenticated by some other module than mod_authnz_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
if (!*r->user) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01699)
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
if (req->dn == NULL || !*req->dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01702)
"auth_ldap authorize: require user: user's DN has not "
"been defined; failing authorization");
return AUTHZ_DENIED;
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02585)
"auth_ldap authorize: require user: Can't evaluate expression: %s",
err);
return AUTHZ_DENIED;
}
/*
* 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, require);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01703)
"auth_ldap authorize: require user: authorization "
"successful");
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01704)
"auth_ldap authorize: require user: "
"authorization failed [%s][%s]",
ldc->reason, ldap_err2string(result));
}
}
/*
* Now break apart the line and compare each word on it
*/
t = require;
while ((w = ap_getword_conf(r->pool, &t)) && w[0]) {
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, 0, r, APLOGNO(01705)
"auth_ldap authorize: "
"require user: authorization successful");
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01706)
"auth_ldap authorize: "
"require user: authorization failed [%s][%s]",
ldc->reason, ldap_err2string(result));
}
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01707)
"auth_ldap authorize user: authorization denied for "
"user %s to %s",
r->user, r->uri);
return AUTHZ_DENIED;
}
static authz_status ldapgroup_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
struct mod_auth_ldap_groupattr_entry_t *ent;
int i;
if (!r->user) {
return AUTHZ_DENIED_NO_USER;
}
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (!sec->host) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01708)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
if (!req) {
authz_status rv = AUTHZ_DENIED;
req = build_request_config(r);
ldc = get_connection_for_authz(r, LDAP_COMPARE);
if (AUTHZ_GRANTED != (rv = get_dn_for_nonldap_authn(r, ldc))) {
return rv;
}
}
else {
ldc = get_connection_for_authz(r, LDAP_COMPARE);
}
/*
* 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 there are no elements in the sub group classes array, the default
* should be groupOfNames and groupOfUniqueNames; populate the array now.
*/
if (sec->subgroupclasses->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->subgroupclasses);
grp->name = "groupOfNames";
grp = apr_array_push(sec->subgroupclasses);
grp->name = "groupOfUniqueNames";
#if APR_HAS_THREADS
apr_thread_mutex_unlock(sec->lock);
#endif
}
/*
* If we have been authenticated by some other module than mod_auth_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
if (!*r->user) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01709)
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
ent = (struct mod_auth_ldap_groupattr_entry_t *) sec->groupattr->elts;
if (sec->group_attrib_is_dn) {
if (req->dn == NULL || !*req->dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01712)
"auth_ldap authorize: require group: user's DN has "
"not been defined; failing authorization for user %s",
r->user);
return AUTHZ_DENIED;
}
}
else {
if (req->user == NULL || !*req->user) {
/* 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;
}
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02586)
"auth_ldap authorize: require group: Can't evaluate expression: %s",
err);
return AUTHZ_DENIED;
}
t = require;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01713)
"auth_ldap authorize: require group: testing for group "
"membership in \"%s\"",
t);
/* PR52464 exhaust attrs in base group before checking subgroups */
for (i = 0; i < sec->groupattr->nelts; i++) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01714)
"auth_ldap authorize: require group: testing for %s: "
"%s (%s)",
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);
if (result == LDAP_COMPARE_TRUE) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01715)
"auth_ldap authorize: require group: "
"authorization successful (attribute %s) "
"[%s][%d - %s]",
ent[i].name, ldc->reason, result,
ldap_err2string(result));
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01719)
"auth_ldap authorize: require group \"%s\": "
"didn't match with attr %s [%s][%d - %s]",
t, ent[i].name, ldc->reason, result,
ldap_err2string(result));
}
}
/* nested groups need searches and compares, so grab a new handle */
if (sec->groupattr->nelts > 0) {
release_ldc(r, ldc);
ldc = get_connection_for_authz(r, LDAP_COMPARE_AND_SEARCH);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01716)
"auth_ldap authorise: require group \"%s\": "
"failed [%s][%d - %s], checking sub-groups",
t, ldc->reason, result, ldap_err2string(result));
}
for (i = 0; i < sec->groupattr->nelts; i++) {
result = util_ldap_cache_check_subgroups(r, ldc, sec->url, t, ent[i].name,
sec->group_attrib_is_dn ? req->dn : req->user,
sec->sgAttributes[0] ? sec->sgAttributes : default_attributes,
sec->subgroupclasses,
0, sec->maxNestingDepth);
if (result == LDAP_COMPARE_TRUE) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01717)
"auth_ldap authorise: require group "
"(sub-group): authorisation successful "
"(attribute %s) [%s][%d - %s]",
ent[i].name, ldc->reason, result,
ldap_err2string(result));
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01718)
"auth_ldap authorise: require group "
"(sub-group) \"%s\": didn't match with attr %s "
"[%s][%d - %s]",
t, ldc->reason, ent[i].name, result,
ldap_err2string(result));
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01720)
"auth_ldap authorize group: authorization denied for "
"user %s to %s",
r->user, r->uri);
return AUTHZ_DENIED;
}
static authz_status ldapdn_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
if (!r->user) {
return AUTHZ_DENIED_NO_USER;
}
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (!sec->host) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01721)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
/*
* If we have been authenticated by some other module than mod_auth_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
if (!*r->user) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01722)
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
if (!req) {
authz_status rv = AUTHZ_DENIED;
req = build_request_config(r);
ldc = get_connection_for_authz(r, LDAP_SEARCH); /* comparedn is a search */
if (AUTHZ_GRANTED != (rv = get_dn_for_nonldap_authn(r, ldc))) {
return rv;
}
}
else {
ldc = get_connection_for_authz(r, LDAP_SEARCH); /* comparedn is a search */
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02587)
"auth_ldap authorize: require dn: Can't evaluate expression: %s",
err);
return AUTHZ_DENIED;
}
t = require;
if (req->dn == NULL || !*req->dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01725)
"auth_ldap authorize: require dn: user's DN has not "
"been defined; failing authorization");
return AUTHZ_DENIED;
}
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, 0, r, APLOGNO(01726)
"auth_ldap authorize: "
"require dn: authorization successful");
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01727)
"auth_ldap authorize: "
"require dn \"%s\": LDAP error [%s][%s]",
t, ldc->reason, ldap_err2string(result));
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01728)
"auth_ldap authorize dn: authorization denied for "
"user %s to %s",
r->user, r->uri);
return AUTHZ_DENIED;
}
static authz_status ldapattribute_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
char *w, *value;
if (!r->user) {
return AUTHZ_DENIED_NO_USER;
}
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (!sec->host) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01729)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
/*
* If we have been authenticated by some other module than mod_auth_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
if (!*r->user) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01730)
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
if (!req) {
authz_status rv = AUTHZ_DENIED;
req = build_request_config(r);
ldc = get_connection_for_authz(r, LDAP_COMPARE);
if (AUTHZ_GRANTED != (rv = get_dn_for_nonldap_authn(r, ldc))) {
return rv;
}
}
else {
ldc = get_connection_for_authz(r, LDAP_COMPARE);
}
if (req->dn == NULL || !*req->dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01733)
"auth_ldap authorize: require ldap-attribute: user's DN "
"has not been defined; failing authorization");
return AUTHZ_DENIED;
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02588)
"auth_ldap authorize: require ldap-attribute: Can't "
"evaluate expression: %s", err);
return AUTHZ_DENIED;
}
t = require;
while (t[0]) {
w = ap_getword(r->pool, &t, '=');
value = ap_getword_conf(r->pool, &t);
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01734)
"auth_ldap authorize: checking attribute %s has value %s",
w, value);
result = util_ldap_cache_compare(r, ldc, sec->url, req->dn, w, value);
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01735)
"auth_ldap authorize: "
"require attribute: authorization successful");
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01736)
"auth_ldap authorize: require attribute: "
"authorization failed [%s][%s]",
ldc->reason, ldap_err2string(result));
}
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01737)
"auth_ldap authorize attribute: authorization denied for "
"user %s to %s",
r->user, r->uri);
return AUTHZ_DENIED;
}
static authz_status ldapfilter_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
char filtbuf[FILTER_LENGTH];
const char *dn = NULL;
if (!r->user) {
return AUTHZ_DENIED_NO_USER;
}
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (!sec->host) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01738)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
/*
* If we have been authenticated by some other module than mod_auth_ldap,
* the req structure needed for authorization needs to be created
* and populated with the userid and DN of the account in LDAP
*/
if (!*r->user) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01739)
"ldap authorize: Userid is blank, AuthType=%s",
r->ap_auth_type);
}
if (!req) {
authz_status rv = AUTHZ_DENIED;
req = build_request_config(r);
ldc = get_connection_for_authz(r, LDAP_SEARCH);
if (AUTHZ_GRANTED != (rv = get_dn_for_nonldap_authn(r, ldc))) {
return rv;
}
}
else {
ldc = get_connection_for_authz(r, LDAP_SEARCH);
}
if (req->dn == NULL || !*req->dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01742)
"auth_ldap authorize: require ldap-filter: user's DN "
"has not been defined; failing authorization");
return AUTHZ_DENIED;
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02589)
"auth_ldap authorize: require ldap-filter: Can't "
"evaluate require expression: %s", err);
return AUTHZ_DENIED;
}
t = require;
if (t[0]) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01743)
"auth_ldap authorize: checking filter %s", t);
/* Build the username filter */
if (APR_SUCCESS != authn_ldap_build_filter(filtbuf, r, req->user, t, sec)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02628)
"auth_ldap authorize: ldap filter too long (>%d): %s",
FILTER_LENGTH, filtbuf);
return AUTHZ_DENIED;
}
/* Search for the user DN */
result = util_ldap_cache_getuserdn(r, ldc, sec->url, sec->basedn,
sec->scope, sec->attributes, filtbuf, &dn, &(req->vals));
/* Make sure that the filtered search returned the correct user dn */
if (result == LDAP_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01744)
"auth_ldap authorize: checking dn match %s", dn);
if (sec->compare_as_user) {
/* ldap-filter is the only authz that requires a search and a compare */
release_ldc(r, ldc);
ldc = get_connection_for_authz(r, LDAP_COMPARE);
}
result = util_ldap_cache_comparedn(r, ldc, sec->url, req->dn, dn,
sec->compare_dn_on_server);
}
switch(result) {
case LDAP_COMPARE_TRUE: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01745)
"auth_ldap authorize: require ldap-filter: "
"authorization successful");
set_request_vars(r, LDAP_AUTHZ, req->vals);
return AUTHZ_GRANTED;
}
case LDAP_FILTER_ERROR: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01746)
"auth_ldap authorize: require ldap-filter: "
"%s authorization failed [%s][%s]",
filtbuf, ldc->reason, ldap_err2string(result));
break;
}
default: {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01747)
"auth_ldap authorize: require ldap-filter: "
"authorization failed [%s][%s]",
ldc->reason, ldap_err2string(result));
}
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01748)
"auth_ldap authorize filter: authorization denied for "
"user %s to %s",
r->user, r->uri);
return AUTHZ_DENIED;
}
static authz_status ldapsearch_check_authorization(request_rec *r,
const char *require_args,
const void *parsed_require_args)
{
int result = 0;
authn_ldap_config_t *sec =
(authn_ldap_config_t *)ap_get_module_config(r->per_dir_config, &authnz_ldap_module);
util_ldap_connection_t *ldc = NULL;
const char *err = NULL;
const ap_expr_info_t *expr = parsed_require_args;
const char *require;
const char *t;
const char *dn = NULL;
if (!sec->have_ldap_url) {
return AUTHZ_DENIED;
}
if (sec->host) {
ldc = get_connection_for_authz(r, LDAP_SEARCH);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02636)
"auth_ldap authorize: no sec->host - weird...?");
return AUTHZ_DENIED;
}
require = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02629)
"auth_ldap authorize: require ldap-search: Can't "
"evaluate require expression: %s", err);
return AUTHZ_DENIED;
}
t = require;
if (t[0]) {
const char **vals;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02630)
"auth_ldap authorize: checking filter %s", t);
/* Search for the user DN */
result = util_ldap_cache_getuserdn(r, ldc, sec->url, sec->basedn,
sec->scope, sec->attributes, t, &dn, &vals);
/* Make sure that the filtered search returned a single dn */
if (result == LDAP_SUCCESS && dn) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02631)
"auth_ldap authorize: require ldap-search: "
"authorization successful");
return AUTHZ_GRANTED;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02632)
"auth_ldap authorize: require ldap-search: "
"%s authorization failed [%s][%s]",
t, ldc->reason, ldap_err2string(result));
}
}
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02633)
"auth_ldap authorize search: authorization denied for "
"to %s", r->uri);
return AUTHZ_DENIED;
}
static const char *ldap_parse_config(cmd_parms *cmd, const char *require_line,
const void **parsed_require_line)
{
const char *expr_err = NULL;
ap_expr_info_t *expr;
expr = ap_expr_parse_cmd(cmd, require_line, AP_EXPR_FLAG_STRING_RESULT,
&expr_err, NULL);
if (expr_err)
return apr_pstrcat(cmd->temp_pool,
"Cannot parse expression in require line: ",
expr_err, NULL);
*parsed_require_line = expr;
return NULL;
}
/*
* 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,
const char *mode)
{
int rc;
apr_ldap_url_desc_t *urld;
apr_ldap_err_t *result;
authn_ldap_config_t *sec = config;
rc = apr_ldap_url_parse(cmd->pool, url, &(urld), &(result));
if (rc != APR_SUCCESS) {
return result->reason;
}
sec->url = apr_pstrdup(cmd->pool, url);
/* Set all the values, or at least some sane defaults */
if (sec->host) {
sec->host = apr_pstrcat(cmd->pool, urld->lud_host, " ", sec->host, NULL);
}
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_pstrmemdup(cmd->pool, urld->lud_filter+1,
strlen(urld->lud_filter)-2);
}
else {
sec->filter = apr_pstrdup(cmd->pool, urld->lud_filter);
}
}
else {
sec->filter = "objectclass=*";
}
if (mode) {
if (0 == strcasecmp("NONE", mode)) {
sec->secure = APR_LDAP_NONE;
}
else if (0 == strcasecmp("SSL", mode)) {
sec->secure = APR_LDAP_SSL;
}
else if (0 == strcasecmp("TLS", mode) || 0 == strcasecmp("STARTTLS", mode)) {
sec->secure = APR_LDAP_STARTTLS;
}
else {
return "Invalid LDAP connection mode setting: must be one of NONE, "
"SSL, or TLS/STARTTLS";
}
}
/* "ldaps" indicates secure ldap connections desired
*/
if (strncasecmp(url, "ldaps", 5) == 0)
{
sec->secure = APR_LDAP_SSL;
sec->port = urld->lud_port? urld->lud_port : LDAPS_PORT;
}
else
{
sec->port = urld->lud_port? urld->lud_port : LDAP_PORT;
}
sec->have_ldap_url = 1;
ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, cmd->server,
"auth_ldap url parse: `%s', Host: %s, Port: %d, DN: %s, "
"attrib: %s, scope: %s, filter: %s, connection mode: %s",
url,
urld->lud_host,
urld->lud_port,
urld->lud_dn,
urld->lud_attrs? urld->lud_attrs[0] : "(null)",
(urld->lud_scope == LDAP_SCOPE_SUBTREE? "subtree" :
urld->lud_scope == LDAP_SCOPE_BASE? "base" :
urld->lud_scope == LDAP_SCOPE_ONELEVEL? "onelevel" : "unknown"),
urld->lud_filter,
sec->secure == APR_LDAP_SSL ? "using SSL": "not using SSL"
);
return NULL;
}
static const char *mod_auth_ldap_set_deref(cmd_parms *cmd, void *config, const char *arg)
{
authn_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 AuthLDAPDereferenceAliases directive";
}
return NULL;
}
static const char *mod_auth_ldap_add_subgroup_attribute(cmd_parms *cmd, void *config, const char *arg)
{
int i;
authn_ldap_config_t *sec = config;
for (i = 0; sec->sgAttributes[i]; i++) {
;
}
if (i == GROUPATTR_MAX_ELTS)
return "Too many AuthLDAPSubGroupAttribute values";
sec->sgAttributes[i] = apr_pstrdup(cmd->pool, arg);
return NULL;
}
static const char *mod_auth_ldap_add_subgroup_class(cmd_parms *cmd, void *config, const char *arg)
{
struct mod_auth_ldap_groupattr_entry_t *new;
authn_ldap_config_t *sec = config;
if (sec->subgroupclasses->nelts > GROUPATTR_MAX_ELTS)
return "Too many AuthLDAPSubGroupClass values";
new = apr_array_push(sec->subgroupclasses);
new->name = apr_pstrdup(cmd->pool, arg);
return NULL;
}
static const char *mod_auth_ldap_set_subgroup_maxdepth(cmd_parms *cmd,
void *config,
const char *max_depth)
{
authn_ldap_config_t *sec = config;
sec->maxNestingDepth = atol(max_depth);
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;
authn_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, &authnz_ldap_module,
(void *)arg);
return NULL;
}
static const char *set_bind_pattern(cmd_parms *cmd, void *_cfg, const char *exp, const char *subst)
{
authn_ldap_config_t *sec = _cfg;
ap_regex_t *regexp;
regexp = ap_pregcomp(cmd->pool, exp, AP_REG_EXTENDED);
if (!regexp) {
return apr_pstrcat(cmd->pool, "AuthLDAPInitialBindPattern: cannot compile regular "
"expression '", exp, "'", NULL);
}
sec->bind_regex = regexp;
sec->bind_subst = subst;
return NULL;
}
static const char *set_bind_password(cmd_parms *cmd, void *_cfg, const char *arg)
{
authn_ldap_config_t *sec = _cfg;
int arglen = strlen(arg);
char **argv;
char *result;
if ((arglen > 5) && strncmp(arg, "exec:", 5) == 0) {
if (apr_tokenize_to_argv(arg+5, &argv, cmd->temp_pool) != APR_SUCCESS) {
return apr_pstrcat(cmd->pool,
"Unable to parse exec arguments from ",
arg+5, NULL);
}
argv[0] = ap_server_root_relative(cmd->temp_pool, argv[0]);
if (!argv[0]) {
return apr_pstrcat(cmd->pool,
"Invalid AuthLDAPBindPassword exec location:",
arg+5, NULL);
}
result = ap_get_exec_line(cmd->pool,
(const char*)argv[0], (const char * const *)argv);
if (!result) {
return apr_pstrcat(cmd->pool,
"Unable to get bind password from exec of ",
arg+5, NULL);
}
sec->bindpw = result;
}
else {
sec->bindpw = (char *)arg;
}
if (!(*sec->bindpw)) {
return "Empty passwords are invalid for AuthLDAPBindPassword";
}
return NULL;
}
static const command_rec authnz_ldap_cmds[] =
{
AP_INIT_TAKE12("AuthLDAPURL", mod_auth_ldap_parse_url, NULL, OR_AUTHCFG,
"URL to define LDAP connection. This should be an RFC 2255 compliant\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(authn_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", set_bind_password, NULL, OR_AUTHCFG,
"Password to use to bind to LDAP server. If not provided, will do an anonymous bind."),
AP_INIT_FLAG("AuthLDAPBindAuthoritative", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, bind_authoritative), OR_AUTHCFG,
"Set to 'on' to return failures when user-specific bind fails - defaults to on."),
AP_INIT_FLAG("AuthLDAPRemoteUserIsDN", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_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_TAKE1("AuthLDAPRemoteUserAttribute", ap_set_string_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, remote_user_attribute), OR_AUTHCFG,
"Override the user supplied username and place the "
"contents of this attribute in the REMOTE_USER "
"environment variable."),
AP_INIT_FLAG("AuthLDAPCompareDNOnServer", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_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("AuthLDAPSubGroupAttribute", mod_auth_ldap_add_subgroup_attribute, NULL, OR_AUTHCFG,
"Attribute labels used to define sub-group (or nested group) membership in groups - "
"defaults to member and uniqueMember"),
AP_INIT_ITERATE("AuthLDAPSubGroupClass", mod_auth_ldap_add_subgroup_class, NULL, OR_AUTHCFG,
"LDAP objectClass values used to identify sub-group instances - "
"defaults to groupOfNames and groupOfUniqueNames"),
AP_INIT_TAKE1("AuthLDAPMaxSubGroupDepth", mod_auth_ldap_set_subgroup_maxdepth, NULL, OR_AUTHCFG,
"Maximum subgroup nesting depth to be evaluated - defaults to 10 (top-level group = 0)"),
AP_INIT_ITERATE("AuthLDAPGroupAttribute", mod_auth_ldap_add_group_attribute, NULL, OR_AUTHCFG,
"A list of attribute labels used to identify the user members of groups - defaults to "
"member and uniquemember"),
AP_INIT_FLAG("AuthLDAPGroupAttributeIsDN", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_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 be one of the "
"values \"never\", \"searching\", \"finding\", or \"always\". "
"Defaults to always."),
AP_INIT_TAKE1("AuthLDAPCharsetConfig", set_charset_config, NULL, RSRC_CONF,
"Character set conversion configuration file. If omitted, character set "
"conversion is disabled."),
AP_INIT_TAKE1("AuthLDAPAuthorizePrefix", ap_set_string_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, authz_prefix), OR_AUTHCFG,
"The prefix to add to environment variables set during "
"successful authorization, default '" AUTHZ_PREFIX "'"),
AP_INIT_FLAG("AuthLDAPInitialBindAsUser", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, initial_bind_as_user), OR_AUTHCFG,
"Set to 'on' to perform the initial DN lookup with the basic auth credentials "
"instead of anonymous or hard-coded credentials"),
AP_INIT_TAKE2("AuthLDAPInitialBindPattern", set_bind_pattern, NULL, OR_AUTHCFG,
"The regex and substitution to determine a username that can bind based on an HTTP basic auth username"),
AP_INIT_FLAG("AuthLDAPSearchAsUser", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, search_as_user), OR_AUTHCFG,
"Set to 'on' to perform authorization-based searches with the users credentials, when this module "
"has also performed authentication. Does not affect nested groups lookup."),
AP_INIT_FLAG("AuthLDAPCompareAsUser", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_ldap_config_t, compare_as_user), OR_AUTHCFG,
"Set to 'on' to perform authorization-based compares with the users credentials, when this module "
"has also performed authentication. Does not affect nested groups lookups."),
{NULL}
};
static int authnz_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,
&authnz_ldap_module);
apr_status_t status;
/*
authn_ldap_config_t *sec = (authn_ldap_config_t *)
ap_get_module_config(s->module_config,
&authnz_ldap_module);
if (sec->secure)
{
if (!util_ldap_ssl_supported(s))
{
ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(03159)
"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, 0, s, APLOGNO(01749)
"Module mod_ldap missing. Mod_ldap (aka. util_ldap) "
"must be loaded in order for mod_authnz_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, APLOGNO(01750)
"Invalid charset conversion config path %s",
(const char *)ap_get_module_config(s->module_config,
&authnz_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, APLOGNO(01751)
"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, APLOGNO(01752)
"could not find the UTF-8 charset in the file %s.",
charset_confname);
return HTTP_INTERNAL_SERVER_ERROR;
}
return OK;
}
static const authn_provider authn_ldap_provider =
{
&authn_ldap_check_password,
NULL,
};
static const authz_provider authz_ldapuser_provider =
{
&ldapuser_check_authorization,
&ldap_parse_config,
};
static const authz_provider authz_ldapgroup_provider =
{
&ldapgroup_check_authorization,
&ldap_parse_config,
};
static const authz_provider authz_ldapdn_provider =
{
&ldapdn_check_authorization,
&ldap_parse_config,
};
static const authz_provider authz_ldapattribute_provider =
{
&ldapattribute_check_authorization,
&ldap_parse_config,
};
static const authz_provider authz_ldapfilter_provider =
{
&ldapfilter_check_authorization,
&ldap_parse_config,
};
static const authz_provider authz_ldapsearch_provider =
{
&ldapsearch_check_authorization,
&ldap_parse_config,
};
static void ImportULDAPOptFn(void)
{
util_ldap_connection_close = APR_RETRIEVE_OPTIONAL_FN(uldap_connection_close);
util_ldap_connection_find = APR_RETRIEVE_OPTIONAL_FN(uldap_connection_find);
util_ldap_cache_comparedn = APR_RETRIEVE_OPTIONAL_FN(uldap_cache_comparedn);
util_ldap_cache_compare = APR_RETRIEVE_OPTIONAL_FN(uldap_cache_compare);
util_ldap_cache_checkuserid = APR_RETRIEVE_OPTIONAL_FN(uldap_cache_checkuserid);
util_ldap_cache_getuserdn = APR_RETRIEVE_OPTIONAL_FN(uldap_cache_getuserdn);
util_ldap_ssl_supported = APR_RETRIEVE_OPTIONAL_FN(uldap_ssl_supported);
util_ldap_cache_check_subgroups = APR_RETRIEVE_OPTIONAL_FN(uldap_cache_check_subgroups);
}
/** Cleanup LDAP connections before EOR. Note, if the authorization is unsuccessful,
* this will not run, but EOR is unlikely to be delayed as in a successful request.
*/
static apr_status_t authnz_ldap_fixups(request_rec *r)
{
authn_ldap_request_t *req =
(authn_ldap_request_t *)ap_get_module_config(r->request_config, &authnz_ldap_module);
if (req && req->ldc_pool) {
apr_pool_destroy(req->ldc_pool);
}
return OK;
}
static void register_hooks(apr_pool_t *p)
{
/* Register authn provider */
ap_register_auth_provider(p, AUTHN_PROVIDER_GROUP, "ldap",
AUTHN_PROVIDER_VERSION,
&authn_ldap_provider, AP_AUTH_INTERNAL_PER_CONF);
/* Register authz providers */
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-user",
AUTHZ_PROVIDER_VERSION,
&authz_ldapuser_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-group",
AUTHZ_PROVIDER_VERSION,
&authz_ldapgroup_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-dn",
AUTHZ_PROVIDER_VERSION,
&authz_ldapdn_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-attribute",
AUTHZ_PROVIDER_VERSION,
&authz_ldapattribute_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-filter",
AUTHZ_PROVIDER_VERSION,
&authz_ldapfilter_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "ldap-search",
AUTHZ_PROVIDER_VERSION,
&authz_ldapsearch_provider,
AP_AUTH_INTERNAL_PER_CONF);
ap_hook_post_config(authnz_ldap_post_config,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_fixups(authnz_ldap_fixups,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_optional_fn_retrieve(ImportULDAPOptFn,NULL,NULL,APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(authnz_ldap) =
{
STANDARD20_MODULE_STUFF,
create_authnz_ldap_dir_config, /* dir config creater */
NULL, /* dir merger --- default is to override */
NULL, /* server config */
NULL, /* merge server config */
authnz_ldap_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};