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/* 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.
*/
/*
* http_auth: authentication
*
* Rob McCool & Brian Behlendorf.
*
* Adapted to Apache by rst.
*
* Version 0.5 May 1996
*
* Modified by Dirk.vanGulik@jrc.it to
*
* Adapted to allow anonymous logins, just like with Anon-FTP, when
* one gives the magic user name 'anonymous' and ones email address
* as the password.
*
* Just add the following tokes to your <directory> setup:
*
* Anonymous magic-userid [magic-userid]...
*
* Anonymous_MustGiveEmail [ on | off ] default = on
* Anonymous_LogEmail [ on | off ] default = on
* Anonymous_VerifyEmail [ on | off ] default = off
* Anonymous_NoUserId [ on | off ] default = off
* Anonymous_Authoritative [ on | off ] default = off
*
* The magic user id is something like 'anonymous', it is NOT case sensitive.
*
* The MustGiveEmail flag can be used to force users to enter something
* in the password field (like an email address). Default is on.
*
* Furthermore the 'NoUserID' flag can be set to allow completely empty
* usernames in as well; this can be is convenient as a single return
* in broken GUIs like W95 is often given by the user. The Default is off.
*
* Dirk.vanGulik@jrc.it; http://ewse.ceo.org; http://me-www.jrc.it/~dirkx
*
*/
#include "apr_strings.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_request.h"
#include "http_protocol.h"
typedef struct anon_auth {
char *password;
struct anon_auth *next;
} anon_auth;
typedef struct {
anon_auth *anon_auth_passwords;
int anon_auth_nouserid;
int anon_auth_logemail;
int anon_auth_verifyemail;
int anon_auth_mustemail;
int anon_auth_authoritative;
} anon_auth_config_rec;
static void *create_anon_auth_dir_config(apr_pool_t *p, char *d)
{
anon_auth_config_rec *conf = apr_palloc(p, sizeof(*conf));
/* just to illustrate the defaults really. */
conf->anon_auth_passwords = NULL;
conf->anon_auth_nouserid = 0;
conf->anon_auth_logemail = 1;
conf->anon_auth_verifyemail = 0;
conf->anon_auth_mustemail = 1;
conf->anon_auth_authoritative = 0;
return conf;
}
static const char *anon_set_string_slots(cmd_parms *cmd,
void *my_config, const char *arg)
{
anon_auth_config_rec *conf = my_config;
anon_auth *first;
if (!(*arg))
return "Anonymous string cannot be empty, use Anonymous_NoUserId instead";
/* squeeze in a record */
first = conf->anon_auth_passwords;
if (!(conf->anon_auth_passwords = apr_palloc(cmd->pool, sizeof(anon_auth))) ||
!(conf->anon_auth_passwords->password = apr_pstrdup(cmd->pool, arg)))
return "Failed to claim memory for an anonymous password...";
/* and repair the next */
conf->anon_auth_passwords->next = first;
return NULL;
}
static const command_rec anon_auth_cmds[] =
{
AP_INIT_ITERATE("Anonymous", anon_set_string_slots, NULL, OR_AUTHCFG,
"a space-separated list of user IDs"),
AP_INIT_FLAG("Anonymous_MustGiveEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(anon_auth_config_rec, anon_auth_mustemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_NoUserId", ap_set_flag_slot,
(void *)APR_OFFSETOF(anon_auth_config_rec, anon_auth_nouserid),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_VerifyEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(anon_auth_config_rec, anon_auth_verifyemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_LogEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(anon_auth_config_rec, anon_auth_logemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_Authoritative", ap_set_flag_slot,
(void *)APR_OFFSETOF(anon_auth_config_rec, anon_auth_authoritative),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
{NULL}
};
module AP_MODULE_DECLARE_DATA auth_anon_module;
static int anon_authenticate_basic_user(request_rec *r)
{
anon_auth_config_rec *conf = ap_get_module_config(r->per_dir_config,
&auth_anon_module);
const char *sent_pw;
int res = DECLINED;
if ((res = ap_get_basic_auth_pw(r, &sent_pw))) {
return res;
}
/* Ignore if we are not configured */
if (!conf->anon_auth_passwords) {
return DECLINED;
}
/* Do we allow an empty userID and/or is it the magic one
*/
if ((!(r->user[0])) && (conf->anon_auth_nouserid)) {
res = OK;
}
else {
anon_auth *p = conf->anon_auth_passwords;
res = DECLINED;
while ((res == DECLINED) && (p != NULL)) {
if (!(strcasecmp(r->user, p->password))) {
res = OK;
}
p = p->next;
}
}
if (
/* username is OK */
(res == OK)
/* password been filled out ? */
&& ((!conf->anon_auth_mustemail) || strlen(sent_pw))
/* does the password look like an email address ? */
&& ((!conf->anon_auth_verifyemail)
|| ((strpbrk("@", sent_pw) != NULL)
&& (strpbrk(".", sent_pw) != NULL)))) {
if (conf->anon_auth_logemail && ap_is_initial_req(r)) {
ap_log_rerror(APLOG_MARK, APLOG_INFO, APR_SUCCESS, r,
"Anonymous: Passwd <%s> Accepted",
sent_pw ? sent_pw : "\'none\'");
}
return OK;
}
else {
if (conf->anon_auth_authoritative) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_SUCCESS, r,
"Anonymous: Authoritative, Passwd <%s> not accepted",
sent_pw ? sent_pw : "\'none\'");
return HTTP_UNAUTHORIZED;
}
/* Drop out the bottom to return DECLINED */
}
return DECLINED;
}
static int check_anon_access(request_rec *r)
{
#ifdef NOTYET
conn_rec *c = r->connection;
anon_auth_config_rec *conf = ap_get_module_config(r->per_dir_config,
&auth_anon_module);
if (!conf->anon_auth) {
return DECLINED;
}
if (strcasecmp(r->connection->user, conf->anon_auth)) {
return DECLINED;
}
return OK;
#endif
return DECLINED;
}
static void register_hooks(apr_pool_t *p)
{
ap_hook_check_user_id(anon_authenticate_basic_user,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_auth_checker(check_anon_access,NULL,NULL,APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA auth_anon_module =
{
STANDARD20_MODULE_STUFF,
create_anon_auth_dir_config, /* dir config creater */
NULL, /* dir merger ensure strictness */
NULL, /* server config */
NULL, /* merge server config */
anon_auth_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};
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