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Celestin Apprentice 4
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Apache 1.0
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mod_auth.c
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1995-12-04
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/* ====================================================================
* Copyright (c) 1995 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.
*
* 5. 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
* IT'S 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
*
* Adapted to Shambhala by rst.
*/
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_protocol.h"
typedef struct auth_config_struct {
char *auth_pwfile;
char *auth_grpfile;
} auth_config_rec;
void *create_auth_dir_config (pool *p, char *d)
{
return pcalloc (p, sizeof(auth_config_rec));
}
command_rec auth_cmds[] = {
{ "AuthUserFile", set_string_slot,
(void*)XtOffsetOf(auth_config_rec,auth_pwfile), OR_AUTHCFG, TAKE1, NULL },
{ "AuthGroupFile", set_string_slot,
(void*)XtOffsetOf(auth_config_rec,auth_grpfile), OR_AUTHCFG, TAKE1, NULL },
{ NULL }
};
module auth_module;
char *get_pw(request_rec *r, char *user, char *auth_pwfile)
{
FILE *f;
char l[MAX_STRING_LEN];
char *rpw, *w;
if(!(f=pfopen(r->pool, auth_pwfile, "r"))) {
log_reason ("Could not open password file", auth_pwfile, r);
return NULL;
}
while(!(cfg_getline(l,MAX_STRING_LEN,f))) {
if((l[0] == '#') || (!l[0])) continue;
rpw = l;
w = getword(r->pool, &rpw, ':');
if(!strcmp(user,w)) {
pfclose(r->pool, f);
return pstrdup (r->pool, rpw);
}
}
pfclose(r->pool, f);
return NULL;
}
table *groups_for_user (pool *p, char *user, char *grpfile) {
FILE *f;
table *grps = make_table (p, 15);
pool *sp;
char l[MAX_STRING_LEN];
char *group_name, *ll, *w;
if(!(f=pfopen(p, grpfile, "r")))
return NULL;
sp = make_sub_pool (p);
while(!(cfg_getline(l,MAX_STRING_LEN,f))) {
if((l[0] == '#') || (!l[0])) continue;
ll = l;
clear_pool (sp);
group_name = getword(sp, &ll, ':');
while(ll[0]) {
w = getword_conf (sp, &ll);
if(!strcmp(w,user)) {
table_set (grps, group_name, "in");
break;
}
}
}
pfclose(p, f);
destroy_pool (sp);
return grps;
}
/* These functions return 0 if client is OK, and proper error status
* if not... either AUTH_REQUIRED, if we made a check, and it failed, or
* SERVER_ERROR, if things are so totally confused that we couldn't
* figure out how to tell if the client is authorized or not.
*
* If they return DECLINED, and all other modules also decline, that's
* treated by the server core as a configuration error, logged and
* reported as such.
*/
/* Determine user ID, and check if it really is that user, for HTTP
* basic authentication...
*/
int authenticate_basic_user (request_rec *r)
{
auth_config_rec *sec =
(auth_config_rec *)get_module_config (r->per_dir_config, &auth_module);
conn_rec *c = r->connection;
char *sent_pw, *real_pw;
char errstr[MAX_STRING_LEN];
int res;
if ((res = get_basic_auth_pw (r, &sent_pw))) return res;
if(!sec->auth_pwfile)
return DECLINED;
if (!(real_pw = get_pw(r, c->user, sec->auth_pwfile))) {
sprintf(errstr,"user %s not found",c->user);
log_reason (errstr, r->uri, r);
note_basic_auth_failure (r);
return AUTH_REQUIRED;
}
/* anyone know where the prototype for crypt is? */
if(strcmp(real_pw,(char *)crypt(sent_pw,real_pw))) {
sprintf(errstr,"user %s: password mismatch",c->user);
log_reason (errstr, r->uri, r);
note_basic_auth_failure (r);
return AUTH_REQUIRED;
}
return OK;
}
/* Checking ID */
int check_user_access (request_rec *r) {
auth_config_rec *sec =
(auth_config_rec *)get_module_config (r->per_dir_config, &auth_module);
char *user = r->connection->user;
int m = r->method_number;
register int x;
char *t, *w;
table *grpstatus;
array_header *reqs_arr = requires (r);
require_line *reqs;
/* BUG FIX: tadc, 11-Nov-1995. If there is no "requires" directive,
* then any user will do.
*/
if (!reqs_arr)
return (OK);
reqs = (require_line *)reqs_arr->elts;
if(sec->auth_grpfile)
grpstatus = groups_for_user (r->pool, user, sec->auth_grpfile);
else
grpstatus = NULL;
for(x=0; x < reqs_arr->nelts; x++) {
if (! (reqs[x].method_mask & (1 << m))) continue;
t = reqs[x].requirement;
w = getword(r->pool, &t, ' ');
if(!strcmp(w,"valid-user"))
return OK;
if(!strcmp(w,"user")) {
while(t[0]) {
w = getword_conf (r->pool, &t);
if(!strcmp(user,w))
return OK;
}
}
else if(!strcmp(w,"group")) {
if(!grpstatus)
return DECLINED; /* DBM group? Something else? */
while(t[0]) {
w = getword_conf(r->pool, &t);
if(table_get (grpstatus, w))
return OK;
}
}
}
note_basic_auth_failure (r);
return AUTH_REQUIRED;
}
module auth_module = {
STANDARD_MODULE_STUFF,
NULL, /* initializer */
create_auth_dir_config, /* dir config creater */
NULL, /* dir merger --- default is to override */
NULL, /* server config */
NULL, /* merge server config */
auth_cmds, /* command table */
NULL, /* handlers */
NULL, /* filename translation */
authenticate_basic_user, /* check_user_id */
check_user_access, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* fixups */
NULL /* logger */
};