Adding upstream version 2.4.57.upstream/2.4.57

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1977 insertions, 0 deletions

diff --git a/modules/aaa/mod_authnz_ldap.c b/modules/aaa/mod_authnz_ldap.c
new file mode 100644
index 0000000..a7b4939
--- /dev/null
+++ b/modules/aaa/mod_authnz_ldap.c
@@ -0,0 +1,1977 @@
+/* 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 */
+} 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. 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
+static void authn_ldap_build_filter(char *filtbuf,
+                             request_rec *r,
+                             const char* sent_user,
+                             const char* sent_filter,
+                             authn_ldap_config_t *sec)
+{
+    char *p, *q, *filtbuf_end;
+    char *user, *filter;
+    apr_xlate_t *convset = NULL;
+    apr_size_t inbytes;
+    apr_size_t outbytes;
+    char *outbuf;
+    int nofilter = 0;
+
+    if (sent_user != NULL) {
+        user = apr_pstrdup (r->pool, sent_user);
+    }
+    else
+        return;
+
+    if (sent_filter != NULL) {
+        filter = apr_pstrdup (r->pool, sent_filter);
+    }
+    else
+        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 = apr_pstrdup(r->pool, outbuf);
+        }
+    }
+
+    /*
+     * Create the first part of the filter, which consists of the
+     * config-supplied portions.
+     */
+
+    if ((nofilter = (filter && !strcasecmp(filter, "none")))) { 
+        apr_snprintf(filtbuf, FILTER_LENGTH, "(%s=", sec->attribute);
+    }
+    else { 
+        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 + strlen(filtbuf);
+         *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 + strlen(filtbuf);
+         *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 { 
+        if (q + 2 <= filtbuf_end)
+            strcat(filtbuf, "))");
+    }
+
+}
+
+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 = 10;
+    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;
+    util_ldap_connection_close(ldc);
+    return APR_SUCCESS;
+}
+
+static int set_request_vars(request_rec *r, enum auth_ldap_phase phase) {
+    char *prefix = NULL;
+    int prefix_len;
+    int remote_user_attribute_set = 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);
+    const char **vals = req->vals;
+
+    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.
+ */
+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);
+
+    char *binddn = sec->binddn;
+    char *bindpw = sec->bindpw;
+
+    /* If the per-request config isn't set, we didn't authenticate this user, and leave the default credentials */
+    if (req && 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;
+    }
+
+    return util_ldap_connection_find(r, sec->host, sec->port,
+                                     binddn, bindpw,
+                                     sec->deref, sec->secure);
+}
+/*
+ * 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;
+    int result = 0;
+    int remote_user_attribute_set = 0;
+    const char *dn = NULL;
+    const char *utfpassword;
+
+    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);
+
+/*
+    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);
+        }
+
+        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 */
+    authn_ldap_build_filter(filtbuf, r, user, NULL, sec);
+
+    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));
+    util_ldap_connection_close(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);
+
+    /* 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 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;
+
+    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) {
+        ldc = get_connection_for_authz(r, LDAP_COMPARE);
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+    }
+    else {
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01698)
+                      "auth_ldap authorize: no sec->host - weird...?");
+        return AUTHZ_DENIED;
+    }
+
+    /*
+     * 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 (!strlen(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) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01700)
+            "ldap authorize: Creating LDAP req structure");
+
+        req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
+            sizeof(authn_ldap_request_t));
+
+        /* Build the username filter */
+        authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
+
+        /* 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;
+        }
+
+        ap_set_module_config(r->request_config, &authnz_ldap_module, req);
+        req->dn = apr_pstrdup(r->pool, dn);
+        req->user = r->user;
+
+    }
+
+    if (req->dn == NULL || strlen(req->dn) == 0) {
+        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);
+            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);
+                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;
+
+    char filtbuf[FILTER_LENGTH];
+    const char *dn = NULL;
+    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) {
+        ldc = get_connection_for_authz(r, LDAP_COMPARE); /* for the top-level group only */
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+    }
+    else {
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01708)
+                      "auth_ldap authorize: no sec->host - weird...?");
+        return AUTHZ_DENIED;
+    }
+
+    /*
+     * 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 (!strlen(r->user)) {
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01709)
+            "ldap authorize: Userid is blank, AuthType=%s",
+            r->ap_auth_type);
+    }
+
+    if(!req) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01710)
+            "ldap authorize: Creating LDAP req structure");
+
+        req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
+            sizeof(authn_ldap_request_t));
+        /* Build the username filter */
+        authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
+
+        /* 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(01711)
+                "auth_ldap authorise: User DN not found, %s", ldc->reason);
+            return AUTHZ_DENIED;
+        }
+
+        ap_set_module_config(r->request_config, &authnz_ldap_module, req);
+        req->dn = apr_pstrdup(r->pool, dn);
+        req->user = r->user;
+    }
+
+    ent = (struct mod_auth_ldap_groupattr_entry_t *) sec->groupattr->elts;
+
+    if (sec->group_attrib_is_dn) {
+        if (req->dn == NULL || strlen(req->dn) == 0) {
+            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 || 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;
+        }
+    }
+
+    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);
+            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));
+        }
+    }
+    
+    for (i = 0; i < sec->groupattr->nelts; i++) {
+        /* nested groups need searches and compares, so grab a new handle */
+        authnz_ldap_cleanup_connection_close(ldc);
+        apr_pool_cleanup_kill(r->pool, ldc,authnz_ldap_cleanup_connection_close);
+
+        ldc = get_connection_for_authz(r, LDAP_COMPARE_AND_SEARCH);
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+
+        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));
+
+        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);
+            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;
+
+    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) {
+        ldc = get_connection_for_authz(r, LDAP_SEARCH); /* _comparedn is a searche */
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+    }
+    else {
+        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 (!strlen(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) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01723)
+            "ldap authorize: Creating LDAP req structure");
+
+        req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
+            sizeof(authn_ldap_request_t));
+        /* Build the username filter */
+        authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
+
+        /* 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(01724)
+                "auth_ldap authorise: User DN not found with filter %s: %s", filtbuf, ldc->reason);
+            return AUTHZ_DENIED;
+        }
+
+        ap_set_module_config(r->request_config, &authnz_ldap_module, req);
+        req->dn = apr_pstrdup(r->pool, dn);
+        req->user = r->user;
+    }
+
+    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 || strlen(req->dn) == 0) {
+        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);
+            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;
+
+    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) {
+        ldc = get_connection_for_authz(r, LDAP_COMPARE);
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+    }
+    else {
+        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 (!strlen(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) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01731)
+            "ldap authorize: Creating LDAP req structure");
+
+        req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
+            sizeof(authn_ldap_request_t));
+        /* Build the username filter */
+        authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
+
+        /* 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(01732)
+                "auth_ldap authorise: User DN not found with filter %s: %s", filtbuf, ldc->reason);
+            return AUTHZ_DENIED;
+        }
+
+        ap_set_module_config(r->request_config, &authnz_ldap_module, req);
+        req->dn = apr_pstrdup(r->pool, dn);
+        req->user = r->user;
+    }
+
+    if (req->dn == NULL || strlen(req->dn) == 0) {
+        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);
+                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) {
+        ldc = get_connection_for_authz(r, LDAP_SEARCH);
+        apr_pool_cleanup_register(r->pool, ldc,
+                                  authnz_ldap_cleanup_connection_close,
+                                  apr_pool_cleanup_null);
+    }
+    else {
+        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 (!strlen(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) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01740)
+            "ldap authorize: Creating LDAP req structure");
+
+        req = (authn_ldap_request_t *)apr_pcalloc(r->pool,
+            sizeof(authn_ldap_request_t));
+        /* Build the username filter */
+        authn_ldap_build_filter(filtbuf, r, r->user, NULL, sec);
+
+        /* 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(01741)
+                "auth_ldap authorise: User DN not found with filter %s: %s", filtbuf, ldc->reason);
+            return AUTHZ_DENIED;
+        }
+
+        ap_set_module_config(r->request_config, &authnz_ldap_module, req);
+        req->dn = apr_pstrdup(r->pool, dn);
+        req->user = r->user;
+    }
+
+    if (req->dn == NULL || strlen(req->dn) == 0) {
+        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 */
+        authn_ldap_build_filter(filtbuf, r, req->user, t, sec);
+
+        /* 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 */
+                apr_pool_cleanup_kill(r->pool, ldc, authnz_ldap_cleanup_connection_close);
+                authnz_ldap_cleanup_connection_close(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);
+                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 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 = 0;
+
+    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 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);
+}
+
+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_hook_post_config(authnz_ldap_post_config,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 */
+};