1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 /* This module is triggered by an
19 * AuthGroupFile standard /path/to/file
21 * and the presense of a
23 * require group <list-of-groups>
25 * In an applicable limit/directory block for that method.
27 * If there are no AuthGroupFile directives valid for
28 * the request; we DECLINED.
30 * If the AuthGroupFile is defined; but somehow not
31 * accessible: we SERVER_ERROR (was DECLINED).
33 * If there are no 'require ' directives defined for
34 * this request then we DECLINED (was OK).
36 * If there are no 'require ' directives valid for
37 * this request method then we DECLINED. (was OK)
39 * If there are any 'require group' blocks and we
40 * are not in any group - we HTTP_UNAUTHORIZE
44 #include "apr_strings.h"
45 #include "apr_lib.h" /* apr_isspace */
47 #include "ap_config.h"
48 #include "ap_provider.h"
50 #include "http_config.h"
51 #include "http_core.h"
53 #include "http_protocol.h"
54 #include "http_request.h"
55 #include "util_varbuf.h"
58 #include "mod_authz_owner.h"
62 } authz_groupfile_config_rec;
64 static void *create_authz_groupfile_dir_config(apr_pool_t *p, char *d)
66 authz_groupfile_config_rec *conf = apr_palloc(p, sizeof(*conf));
68 conf->groupfile = NULL;
72 static const command_rec authz_groupfile_cmds[] =
74 AP_INIT_TAKE1("AuthGroupFile", ap_set_file_slot,
75 (void *)APR_OFFSETOF(authz_groupfile_config_rec, groupfile),
77 "text file containing group names and member user IDs"),
81 module AP_MODULE_DECLARE_DATA authz_groupfile_module;
83 #define VARBUF_INIT_LEN 512
84 #define VARBUF_MAX_LEN (16*1024*1024)
85 static apr_status_t groups_for_user(apr_pool_t *p, char *user, char *grpfile,
89 apr_table_t *grps = apr_table_make(p, 15);
92 const char *group_name, *ll, *w;
96 if ((status = ap_pcfg_openfile(&f, p, grpfile)) != APR_SUCCESS) {
100 apr_pool_create(&sp, p);
101 ap_varbuf_init(p, &vb, VARBUF_INIT_LEN);
103 while (!(ap_varbuf_cfg_getline(&vb, f, VARBUF_MAX_LEN))) {
104 if ((vb.buf[0] == '#') || (!vb.buf[0])) {
110 group_name = ap_getword(sp, &ll, ':');
111 group_len = strlen(group_name);
113 while (group_len && apr_isspace(*(group_name + group_len - 1))) {
118 w = ap_getword_conf(sp, &ll);
119 if (!strcmp(w, user)) {
120 apr_table_setn(grps, apr_pstrmemdup(p, group_name, group_len),
127 apr_pool_destroy(sp);
134 static authz_status group_check_authorization(request_rec *r,
135 const char *require_args,
136 const void *parsed_require_args)
138 authz_groupfile_config_rec *conf = ap_get_module_config(r->per_dir_config,
139 &authz_groupfile_module);
140 char *user = r->user;
142 const char *err = NULL;
143 const ap_expr_info_t *expr = parsed_require_args;
147 apr_table_t *grpstatus = NULL;
151 return AUTHZ_DENIED_NO_USER;
154 /* If there is no group file - then we are not
155 * configured. So decline.
157 if (!(conf->groupfile)) {
158 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01664)
159 "No group file was specified in the configuration");
163 status = groups_for_user(r->pool, user, conf->groupfile,
166 if (status != APR_SUCCESS) {
167 ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(01665)
168 "Could not open group file: %s",
173 if (apr_is_empty_table(grpstatus)) {
174 /* no groups available, so exit immediately */
175 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01666)
176 "Authorization of user %s to access %s failed, reason: "
177 "user doesn't appear in group file (%s).",
178 r->user, r->uri, conf->groupfile);
182 require = ap_expr_str_exec(r, expr, &err);
184 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02592)
185 "authz_groupfile authorize: require group: Can't "
186 "evaluate require expression: %s", err);
191 while ((w = ap_getword_conf(r->pool, &t)) && w[0]) {
192 if (apr_table_get(grpstatus, w)) {
193 return AUTHZ_GRANTED;
197 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01667)
198 "Authorization of user %s to access %s failed, reason: "
199 "user is not part of the 'require'ed group(s).",
205 static APR_OPTIONAL_FN_TYPE(authz_owner_get_file_group) *authz_owner_get_file_group;
207 static authz_status filegroup_check_authorization(request_rec *r,
208 const char *require_args,
209 const void *parsed_require_args)
211 authz_groupfile_config_rec *conf = ap_get_module_config(r->per_dir_config,
212 &authz_groupfile_module);
213 char *user = r->user;
214 apr_table_t *grpstatus = NULL;
216 const char *filegroup = NULL;
219 return AUTHZ_DENIED_NO_USER;
222 /* If there is no group file - then we are not
223 * configured. So decline.
225 if (!(conf->groupfile)) {
226 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01668)
227 "No group file was specified in the configuration");
231 status = groups_for_user(r->pool, user, conf->groupfile,
233 if (status != APR_SUCCESS) {
234 ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(01669)
235 "Could not open group file: %s",
240 if (apr_is_empty_table(grpstatus)) {
241 /* no groups available, so exit immediately */
242 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01670)
243 "Authorization of user %s to access %s failed, reason: "
244 "user doesn't appear in group file (%s).",
245 r->user, r->uri, conf->groupfile);
249 filegroup = authz_owner_get_file_group(r);
252 if (apr_table_get(grpstatus, filegroup)) {
253 return AUTHZ_GRANTED;
257 /* No need to emit a error log entry because the call
258 to authz_owner_get_file_group already did it
264 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01671)
265 "Authorization of user %s to access %s failed, reason: "
266 "user is not part of the 'require'ed file group.",
272 static const char *groupfile_parse_config(cmd_parms *cmd, const char *require_line,
273 const void **parsed_require_line)
275 const char *expr_err = NULL;
276 ap_expr_info_t *expr;
278 expr = ap_expr_parse_cmd(cmd, require_line, AP_EXPR_FLAG_STRING_RESULT,
282 return apr_pstrcat(cmd->temp_pool,
283 "Cannot parse expression in require line: ",
286 *parsed_require_line = expr;
291 static const authz_provider authz_group_provider =
293 &group_check_authorization,
294 &groupfile_parse_config,
297 static const authz_provider authz_filegroup_provider =
299 &filegroup_check_authorization,
304 static void authz_groupfile_getfns(void)
306 authz_owner_get_file_group = APR_RETRIEVE_OPTIONAL_FN(authz_owner_get_file_group);
309 static void register_hooks(apr_pool_t *p)
311 ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "group",
312 AUTHZ_PROVIDER_VERSION,
313 &authz_group_provider,
314 AP_AUTH_INTERNAL_PER_CONF);
315 ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "file-group",
316 AUTHZ_PROVIDER_VERSION,
317 &authz_filegroup_provider,
318 AP_AUTH_INTERNAL_PER_CONF);
319 ap_hook_optional_fn_retrieve(authz_groupfile_getfns, NULL, NULL, APR_HOOK_MIDDLE);
322 AP_DECLARE_MODULE(authz_groupfile) =
324 STANDARD20_MODULE_STUFF,
325 create_authz_groupfile_dir_config,/* dir config creater */
326 NULL, /* dir merger -- default is to override */
327 NULL, /* server config */
328 NULL, /* merge server config */
329 authz_groupfile_cmds, /* command apr_table_t */
330 register_hooks /* register hooks */