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/* ====================================================================
* Copyright (c) 1995-1998 The Apache Group. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
/*
* http_auth: authentication
*
* Rob McCool & Brian Behlendorf.
*
* Adapted to Apache by rst.
*
* dirkx - Added Authoritative control to allow passing on to lower
* modules if and only if the user-id is not known to this
* module. A known user with a faulty or absent password still
* causes an AuthRequired. The default is 'Authoritative', i.e.
* no control is passed along.
*/
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
#include <ndbm.h>
/*
* Module definition information - the part between the -START and -END
* lines below is used by Configure. This could be stored in a separate
* instead.
*
* MODULE-DEFINITION-START
* Name: dbm_auth_module
* ConfigStart
. ./helpers/find-dbm-lib
* ConfigEnd
* MODULE-DEFINITION-END
*/
typedef struct {
char *auth_dbmpwfile;
char *auth_dbmgrpfile;
int auth_dbmauthoritative;
} dbm_auth_config_rec;
static void *create_dbm_auth_dir_config(pool *p, char *d)
{
dbm_auth_config_rec *sec
= (dbm_auth_config_rec *) ap_pcalloc(p, sizeof(dbm_auth_config_rec));
sec->auth_dbmpwfile = NULL;
sec->auth_dbmgrpfile = NULL;
sec->auth_dbmauthoritative = 1; /* fortress is secure by default */
return sec;
}
static const char *set_dbm_slot(cmd_parms *cmd, void *offset, char *f, char *t)
{
if (!t || strcmp(t, "dbm"))
return DECLINE_CMD;
return ap_set_file_slot(cmd, offset, f);
}
static const command_rec dbm_auth_cmds[] =
{
{"AuthDBMUserFile", ap_set_file_slot,
(void *) XtOffsetOf(dbm_auth_config_rec, auth_dbmpwfile),
OR_AUTHCFG, TAKE1, NULL},
{"AuthDBMGroupFile", ap_set_file_slot,
(void *) XtOffsetOf(dbm_auth_config_rec, auth_dbmgrpfile),
OR_AUTHCFG, TAKE1, NULL},
{"AuthUserFile", set_dbm_slot,
(void *) XtOffsetOf(dbm_auth_config_rec, auth_dbmpwfile),
OR_AUTHCFG, TAKE12, NULL},
{"AuthGroupFile", set_dbm_slot,
(void *) XtOffsetOf(dbm_auth_config_rec, auth_dbmgrpfile),
OR_AUTHCFG, TAKE12, NULL},
{"AuthDBMAuthoritative", ap_set_flag_slot,
(void *) XtOffsetOf(dbm_auth_config_rec, auth_dbmauthoritative),
OR_AUTHCFG, FLAG, "Set to 'no' to allow access control to be passed along to lower modules, if the UserID is not known in this module"},
{NULL}
};
module dbm_auth_module;
static char *get_dbm_pw(request_rec *r, char *user, char *auth_dbmpwfile)
{
DBM *f;
datum d, q;
char *pw = NULL;
q.dptr = user;
#ifndef NETSCAPE_DBM_COMPAT
q.dsize = strlen(q.dptr);
#else
q.dsize = strlen(q.dptr) + 1;
#endif
if (!(f = dbm_open(auth_dbmpwfile, O_RDONLY, 0664))) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"could not open dbm auth file: %s", auth_dbmpwfile);
return NULL;
}
d = dbm_fetch(f, q);
if (d.dptr) {
pw = ap_palloc(r->pool, d.dsize + 1);
strncpy(pw, d.dptr, d.dsize);
pw[d.dsize] = '\0'; /* Terminate the string */
}
dbm_close(f);
return pw;
}
/* We do something strange with the group file. If the group file
* contains any : we assume the format is
* key=username value=":"groupname [":"anything here is ignored]
* otherwise we now (0.8.14+) assume that the format is
* key=username value=groupname
* The first allows the password and group files to be the same
* physical DBM file; key=username value=password":"groupname[":"anything]
*
* mark@telescope.org, 22Sep95
*/
static char *get_dbm_grp(request_rec *r, char *user, char *auth_dbmgrpfile)
{
char *grp_data = get_dbm_pw(r, user, auth_dbmgrpfile);
char *grp_colon;
char *grp_colon2;
if (grp_data == NULL)
return NULL;
if ((grp_colon = strchr(grp_data, ':')) != NULL) {
grp_colon2 = strchr(++grp_colon, ':');
if (grp_colon2)
*grp_colon2 = '\0';
return grp_colon;
}
return grp_data;
}
static int dbm_authenticate_basic_user(request_rec *r)
{
dbm_auth_config_rec *sec =
(dbm_auth_config_rec *) ap_get_module_config(r->per_dir_config,
&dbm_auth_module);
conn_rec *c = r->connection;
const char *sent_pw;
char *real_pw, *colon_pw;
int res;
if ((res = ap_get_basic_auth_pw(r, &sent_pw)))
return res;
if (!sec->auth_dbmpwfile)
return DECLINED;
if (!(real_pw = get_dbm_pw(r, c->user, sec->auth_dbmpwfile))) {
if (!(sec->auth_dbmauthoritative))
return DECLINED;
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"DBM user %s not found: %s", c->user, r->filename);
ap_note_basic_auth_failure(r);
return AUTH_REQUIRED;
}
/* Password is up to first : if exists */
colon_pw = strchr(real_pw, ':');
if (colon_pw)
*colon_pw = '\0';
/* anyone know where the prototype for crypt is? */
if (strcmp(real_pw, (char *) crypt(sent_pw, real_pw))) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"user %s: password mismatch: %s", c->user, r->uri);
ap_note_basic_auth_failure(r);
return AUTH_REQUIRED;
}
return OK;
}
/* Checking ID */
static int dbm_check_auth(request_rec *r)
{
dbm_auth_config_rec *sec =
(dbm_auth_config_rec *) ap_get_module_config(r->per_dir_config,
&dbm_auth_module);
char *user = r->connection->user;
int m = r->method_number;
const array_header *reqs_arr = ap_requires(r);
require_line *reqs = reqs_arr ? (require_line *) reqs_arr->elts : NULL;
register int x;
const char *t;
char *w;
if (!sec->auth_dbmgrpfile)
return DECLINED;
if (!reqs_arr)
return DECLINED;
for (x = 0; x < reqs_arr->nelts; x++) {
if (!(reqs[x].method_mask & (1 << m)))
continue;
t = reqs[x].requirement;
w = ap_getword_white(r->pool, &t);
if (!strcmp(w, "group") && sec->auth_dbmgrpfile) {
const char *orig_groups, *groups;
char *v;
if (!(groups = get_dbm_grp(r, user, sec->auth_dbmgrpfile))) {
if (!(sec->auth_dbmauthoritative))
return DECLINED;
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"user %s not in DBM group file %s: %s",
user, sec->auth_dbmgrpfile, r->filename);
ap_note_basic_auth_failure(r);
return AUTH_REQUIRED;
}
orig_groups = groups;
while (t[0]) {
w = ap_getword_white(r->pool, &t);
groups = orig_groups;
while (groups[0]) {
v = ap_getword(r->pool, &groups, ',');
if (!strcmp(v, w))
return OK;
}
}
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
"user %s not in right group: %s",
user, r->filename);
ap_note_basic_auth_failure(r);
return AUTH_REQUIRED;
}
}
return DECLINED;
}
module dbm_auth_module =
{
STANDARD_MODULE_STUFF,
NULL, /* initializer */
create_dbm_auth_dir_config, /* dir config creater */
NULL, /* dir merger --- default is to override */
NULL, /* server config */
NULL, /* merge server config */
dbm_auth_cmds, /* command table */
NULL, /* handlers */
NULL, /* filename translation */
dbm_authenticate_basic_user, /* check_user_id */
dbm_check_auth, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* fixups */
NULL, /* logger */
NULL, /* header parser */
NULL, /* child_init */
NULL, /* child_exit */
NULL /* post read-request */
};
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