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Apache 1.3.9 baseline for the Apache 2.0 repository.
Obtained from: Apache 1.3.9 (minus unused files), tag APACHE_1_3_9 Submitted by: Apache Group git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83751 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Roy T. Fielding
333
modules/aaa/mod_auth.c
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333
modules/aaa/mod_auth.c
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@ -0,0 +1,333 @@
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/* ====================================================================
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* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* 4. The names "Apache Server" and "Apache Group" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Group and was originally based
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* on public domain software written at the National Center for
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* Supercomputing Applications, University of Illinois, Urbana-Champaign.
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* For more information on the Apache Group and the Apache HTTP server
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* project, please see <http://www.apache.org/>.
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*
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*/
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/*
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* http_auth: authentication
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*
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* Rob McCool
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*
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* Adapted to Apache by rst.
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*
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* dirkx - Added Authoritative control to allow passing on to lower
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* modules if and only if the user-id is not known to this
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* module. A known user with a faulty or absent password still
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* causes an AuthRequired. The default is 'Authoritative', i.e.
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* no control is passed along.
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*/
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#include "httpd.h"
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#include "http_config.h"
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#include "http_core.h"
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#include "http_log.h"
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#include "http_protocol.h"
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typedef struct auth_config_struct {
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char *auth_pwfile;
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char *auth_grpfile;
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int auth_authoritative;
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} auth_config_rec;
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static void *create_auth_dir_config(pool *p, char *d)
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{
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auth_config_rec *sec =
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(auth_config_rec *) ap_pcalloc(p, sizeof(auth_config_rec));
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sec->auth_pwfile = NULL; /* just to illustrate the default really */
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sec->auth_grpfile = NULL; /* unless you have a broken HP cc */
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sec->auth_authoritative = 1; /* keep the fortress secure by default */
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return sec;
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}
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static const char *set_auth_slot(cmd_parms *cmd, void *offset, char *f, char *t)
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{
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if (t && strcmp(t, "standard"))
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return ap_pstrcat(cmd->pool, "Invalid auth file type: ", t, NULL);
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return ap_set_file_slot(cmd, offset, f);
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}
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static const command_rec auth_cmds[] =
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{
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{"AuthUserFile", set_auth_slot,
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(void *) XtOffsetOf(auth_config_rec, auth_pwfile), OR_AUTHCFG, TAKE12,
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"text file containing user IDs and passwords"},
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{"AuthGroupFile", set_auth_slot,
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(void *) XtOffsetOf(auth_config_rec, auth_grpfile), OR_AUTHCFG, TAKE12,
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"text file containing group names and member user IDs"},
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{"AuthAuthoritative", ap_set_flag_slot,
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(void *) XtOffsetOf(auth_config_rec, auth_authoritative),
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OR_AUTHCFG, FLAG,
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"Set to 'no' to allow access control to be passed along to lower modules if the UserID is not known to this module"},
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{NULL}
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};
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module MODULE_VAR_EXPORT auth_module;
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static char *get_pw(request_rec *r, char *user, char *auth_pwfile)
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{
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configfile_t *f;
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char l[MAX_STRING_LEN];
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const char *rpw, *w;
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if (!(f = ap_pcfg_openfile(r->pool, auth_pwfile))) {
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ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
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"Could not open password file: %s", auth_pwfile);
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return NULL;
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}
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while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
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if ((l[0] == '#') || (!l[0]))
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continue;
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rpw = l;
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w = ap_getword(r->pool, &rpw, ':');
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if (!strcmp(user, w)) {
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ap_cfg_closefile(f);
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return ap_getword(r->pool, &rpw, ':');
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}
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}
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ap_cfg_closefile(f);
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return NULL;
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}
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static table *groups_for_user(pool *p, char *user, char *grpfile)
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{
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configfile_t *f;
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table *grps = ap_make_table(p, 15);
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pool *sp;
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char l[MAX_STRING_LEN];
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const char *group_name, *ll, *w;
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if (!(f = ap_pcfg_openfile(p, grpfile))) {
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/*add? aplog_error(APLOG_MARK, APLOG_ERR, NULL,
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"Could not open group file: %s", grpfile);*/
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return NULL;
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}
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sp = ap_make_sub_pool(p);
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while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
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if ((l[0] == '#') || (!l[0]))
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continue;
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ll = l;
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ap_clear_pool(sp);
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group_name = ap_getword(sp, &ll, ':');
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while (ll[0]) {
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w = ap_getword_conf(sp, &ll);
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if (!strcmp(w, user)) {
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ap_table_setn(grps, ap_pstrdup(p, group_name), "in");
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break;
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}
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}
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}
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ap_cfg_closefile(f);
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ap_destroy_pool(sp);
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return grps;
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}
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/* These functions return 0 if client is OK, and proper error status
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* if not... either AUTH_REQUIRED, if we made a check, and it failed, or
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* SERVER_ERROR, if things are so totally confused that we couldn't
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* figure out how to tell if the client is authorized or not.
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*
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* If they return DECLINED, and all other modules also decline, that's
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* treated by the server core as a configuration error, logged and
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* reported as such.
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*/
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/* Determine user ID, and check if it really is that user, for HTTP
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* basic authentication...
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*/
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static int authenticate_basic_user(request_rec *r)
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{
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auth_config_rec *sec =
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(auth_config_rec *) ap_get_module_config(r->per_dir_config, &auth_module);
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conn_rec *c = r->connection;
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const char *sent_pw;
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char *real_pw;
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char *invalid_pw;
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int res;
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if ((res = ap_get_basic_auth_pw(r, &sent_pw)))
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return res;
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if (!sec->auth_pwfile)
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return DECLINED;
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if (!(real_pw = get_pw(r, c->user, sec->auth_pwfile))) {
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if (!(sec->auth_authoritative))
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return DECLINED;
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ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
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"user %s not found: %s", c->user, r->uri);
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ap_note_basic_auth_failure(r);
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return AUTH_REQUIRED;
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}
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invalid_pw = ap_validate_password(sent_pw, real_pw);
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if (invalid_pw != NULL) {
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ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
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"user %s: authentication failure for \"%s\": %s",
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c->user, r->uri, invalid_pw);
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ap_note_basic_auth_failure(r);
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return AUTH_REQUIRED;
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}
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return OK;
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}
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/* Checking ID */
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static int check_user_access(request_rec *r)
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{
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auth_config_rec *sec =
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(auth_config_rec *) ap_get_module_config(r->per_dir_config, &auth_module);
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char *user = r->connection->user;
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int m = r->method_number;
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int method_restricted = 0;
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register int x;
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const char *t, *w;
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table *grpstatus;
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const array_header *reqs_arr = ap_requires(r);
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require_line *reqs;
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/* BUG FIX: tadc, 11-Nov-1995. If there is no "requires" directive,
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* then any user will do.
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*/
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if (!reqs_arr)
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return (OK);
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reqs = (require_line *) reqs_arr->elts;
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if (sec->auth_grpfile)
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grpstatus = groups_for_user(r->pool, user, sec->auth_grpfile);
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else
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grpstatus = NULL;
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for (x = 0; x < reqs_arr->nelts; x++) {
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if (!(reqs[x].method_mask & (1 << m)))
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continue;
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method_restricted = 1;
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t = reqs[x].requirement;
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w = ap_getword_white(r->pool, &t);
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if (!strcmp(w, "valid-user"))
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return OK;
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if (!strcmp(w, "user")) {
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while (t[0]) {
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w = ap_getword_conf(r->pool, &t);
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if (!strcmp(user, w))
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return OK;
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}
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}
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else if (!strcmp(w, "group")) {
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if (!grpstatus)
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return DECLINED; /* DBM group? Something else? */
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while (t[0]) {
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w = ap_getword_conf(r->pool, &t);
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if (ap_table_get(grpstatus, w))
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return OK;
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}
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} else if (sec->auth_authoritative) {
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/* if we aren't authoritative, any require directive could be
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* valid even if we don't grok it. However, if we are
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* authoritative, we can warn the user they did something wrong.
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* That something could be a missing "AuthAuthoritative off", but
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* more likely is a typo in the require directive.
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*/
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ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
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"access to %s failed, reason: unknown require directive:"
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"\"%s\"", r->uri, reqs[x].requirement);
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}
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}
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if (!method_restricted)
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return OK;
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if (!(sec->auth_authoritative))
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return DECLINED;
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ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
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"access to %s failed, reason: user %s not allowed access",
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r->uri, user);
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ap_note_basic_auth_failure(r);
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return AUTH_REQUIRED;
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}
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module MODULE_VAR_EXPORT auth_module =
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{
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STANDARD_MODULE_STUFF,
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NULL, /* initializer */
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create_auth_dir_config, /* dir config creater */
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NULL, /* dir merger --- default is to override */
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NULL, /* server config */
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NULL, /* merge server config */
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auth_cmds, /* command table */
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NULL, /* handlers */
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NULL, /* filename translation */
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authenticate_basic_user, /* check_user_id */
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check_user_access, /* check auth */
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NULL, /* check access */
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NULL, /* type_checker */
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NULL, /* fixups */
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NULL, /* logger */
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NULL, /* header parser */
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NULL, /* child_init */
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NULL, /* child_exit */
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NULL /* post read-request */
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};
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