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.
18 * Security options etc.
20 * Module derived from code originally written by Rob McCool
24 #include "apr_strings.h"
25 #include "apr_network_io.h"
28 #define APR_WANT_STRFUNC
29 #define APR_WANT_BYTEFUNC
32 #include "ap_config.h"
34 #include "http_core.h"
35 #include "http_config.h"
37 #include "http_protocol.h"
38 #include "http_request.h"
42 #if APR_HAVE_NETINET_IN_H
43 #include <netinet/in.h>
61 enum allowdeny_type type;
64 /* things in the 'order' array */
65 #define DENY_THEN_ALLOW 0
66 #define ALLOW_THEN_DENY 1
67 #define MUTUAL_FAILURE 2
71 apr_array_header_t *allows;
72 apr_array_header_t *denys;
73 int *satisfy; /* for every method one */
74 } access_compat_dir_conf;
76 module AP_MODULE_DECLARE_DATA access_compat_module;
78 static void *create_access_compat_dir_config(apr_pool_t *p, char *dummy)
81 access_compat_dir_conf *conf =
82 (access_compat_dir_conf *)apr_pcalloc(p, sizeof(access_compat_dir_conf));
84 for (i = 0; i < METHODS; ++i) {
85 conf->order[i] = DENY_THEN_ALLOW;
87 conf->allows = apr_array_make(p, 1, sizeof(allowdeny));
88 conf->denys = apr_array_make(p, 1, sizeof(allowdeny));
89 conf->satisfy = apr_palloc(p, sizeof(*conf->satisfy) * METHODS);
90 for (i = 0; i < METHODS; ++i) {
91 conf->satisfy[i] = SATISFY_NOSPEC;
97 static const char *order(cmd_parms *cmd, void *dv, const char *arg)
99 access_compat_dir_conf *d = (access_compat_dir_conf *) dv;
102 if (!strcasecmp(arg, "allow,deny"))
104 else if (!strcasecmp(arg, "deny,allow"))
106 else if (!strcasecmp(arg, "mutual-failure"))
109 return "unknown order";
111 for (i = 0; i < METHODS; ++i)
112 if (cmd->limited & (AP_METHOD_BIT << i))
118 static const char *satisfy(cmd_parms *cmd, void *dv, const char *arg)
120 access_compat_dir_conf *d = (access_compat_dir_conf *) dv;
121 int satisfy = SATISFY_NOSPEC;
124 if (!strcasecmp(arg, "all")) {
125 satisfy = SATISFY_ALL;
127 else if (!strcasecmp(arg, "any")) {
128 satisfy = SATISFY_ANY;
131 return "Satisfy either 'any' or 'all'.";
134 for (i = 0; i < METHODS; ++i) {
135 if (cmd->limited & (AP_METHOD_BIT << i)) {
136 d->satisfy[i] = satisfy;
143 static const char *allow_cmd(cmd_parms *cmd, void *dv, const char *from,
146 access_compat_dir_conf *d = (access_compat_dir_conf *) dv;
148 char *where = apr_pstrdup(cmd->pool, where_c);
152 if (strcasecmp(from, "from"))
153 return "allow and deny must be followed by 'from'";
155 a = (allowdeny *) apr_array_push(cmd->info ? d->allows : d->denys);
157 a->limited = cmd->limited;
159 if (!strncasecmp(where, "env=!", 5)) {
164 else if (!strncasecmp(where, "env=", 4)) {
169 else if (!strcasecmp(where, "all")) {
172 else if ((s = ap_strchr(where, '/'))) {
174 rv = apr_ipsubnet_create(&a->x.ip, where, s, cmd->pool);
175 if(APR_STATUS_IS_EINVAL(rv)) {
176 /* looked nothing like an IP address */
177 return "An IP address was expected";
179 else if (rv != APR_SUCCESS) {
180 return apr_psprintf(cmd->pool, "%pm", &rv);
184 else if (!APR_STATUS_IS_EINVAL(rv = apr_ipsubnet_create(&a->x.ip, where,
186 if (rv != APR_SUCCESS)
187 return apr_psprintf(cmd->pool, "%pm", &rv);
190 else if (ap_strchr(where, '#')) {
191 return "No comments are allowed here";
193 else { /* no slash, didn't look like an IP address => must be a host */
200 static char its_an_allow;
202 static const command_rec access_compat_cmds[] =
204 AP_INIT_TAKE1("order", order, NULL, OR_LIMIT,
205 "'allow,deny', 'deny,allow', or 'mutual-failure'"),
206 AP_INIT_ITERATE2("allow", allow_cmd, &its_an_allow, OR_LIMIT,
207 "'from' followed by hostnames or IP-address wildcards"),
208 AP_INIT_ITERATE2("deny", allow_cmd, NULL, OR_LIMIT,
209 "'from' followed by hostnames or IP-address wildcards"),
210 AP_INIT_TAKE1("Satisfy", satisfy, NULL, OR_AUTHCFG,
211 "access policy if both allow and require used ('all' or 'any')"),
215 static int in_domain(const char *domain, const char *what)
217 int dl = strlen(domain);
218 int wl = strlen(what);
220 if ((wl - dl) >= 0) {
221 if (strcasecmp(domain, &what[wl - dl]) != 0) {
225 /* Make sure we matched an *entire* subdomain --- if the user
226 * said 'allow from good.com', we don't want people from nogood.com
227 * to be able to get in.
231 return 1; /* matched whole thing */
234 return (domain[0] == '.' || what[wl - dl - 1] == '.');
242 static int find_allowdeny(request_rec *r, apr_array_header_t *a, int method)
245 allowdeny *ap = (allowdeny *) a->elts;
246 apr_int64_t mmask = (AP_METHOD_BIT << method);
249 const char *remotehost = NULL;
251 for (i = 0; i < a->nelts; ++i) {
252 if (!(mmask & ap[i].limited)) {
256 switch (ap[i].type) {
258 if (apr_table_get(r->subprocess_env, ap[i].x.from)) {
264 if (!apr_table_get(r->subprocess_env, ap[i].x.from)) {
273 if (apr_ipsubnet_test(ap[i].x.ip, r->useragent_addr)) {
280 int remotehost_is_ip;
282 remotehost = ap_get_useragent_host(r, REMOTE_DOUBLE_REV,
285 if ((remotehost == NULL) || remotehost_is_ip) {
293 if ((gothost == 2) && in_domain(ap[i].x.from, remotehost)) {
307 static int access_compat_ap_satisfies(request_rec *r)
309 access_compat_dir_conf *conf = (access_compat_dir_conf *)
310 ap_get_module_config(r->per_dir_config, &access_compat_module);
312 return conf->satisfy[r->method_number];
315 static int check_dir_access(request_rec *r)
317 int method = r->method_number;
319 access_compat_dir_conf *a = (access_compat_dir_conf *)
320 ap_get_module_config(r->per_dir_config, &access_compat_module);
322 if (a->order[method] == ALLOW_THEN_DENY) {
323 ret = HTTP_FORBIDDEN;
324 if (find_allowdeny(r, a->allows, method)) {
327 if (find_allowdeny(r, a->denys, method)) {
328 ret = HTTP_FORBIDDEN;
331 else if (a->order[method] == DENY_THEN_ALLOW) {
332 if (find_allowdeny(r, a->denys, method)) {
333 ret = HTTP_FORBIDDEN;
335 if (find_allowdeny(r, a->allows, method)) {
340 if (find_allowdeny(r, a->allows, method)
341 && !find_allowdeny(r, a->denys, method)) {
345 ret = HTTP_FORBIDDEN;
349 if (ret == HTTP_FORBIDDEN) {
350 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01797)
351 "client denied by server configuration: %s%s",
352 r->filename ? "" : "uri ",
353 r->filename ? r->filename : r->uri);
359 static void register_hooks(apr_pool_t *p)
361 APR_REGISTER_OPTIONAL_FN(access_compat_ap_satisfies);
363 /* This can be access checker since we don't require r->user to be set. */
364 ap_hook_check_access(check_dir_access, NULL, NULL, APR_HOOK_MIDDLE,
365 AP_AUTH_INTERNAL_PER_CONF);
368 AP_DECLARE_MODULE(access_compat) =
370 STANDARD20_MODULE_STUFF,
371 create_access_compat_dir_config, /* dir config creater */
372 NULL, /* dir merger --- default is to override */
373 NULL, /* server config */
374 NULL, /* merge server config */
376 register_hooks /* register hooks */