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- /* ====================================================================
- * Copyright (c) 1995-1999 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
- * 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/>.
- *
- */
-
- /*
- * mod_auth_db: authentication
- *
- * Original work by Rob McCool & Brian Behlendorf.
- *
- * Adapted to Apache by rst (mod_auth_dbm)
- *
- * Adapted for Berkeley DB by Andrew Cohen
- *
- * mod_auth_db was based on mod_auth_dbm.
- *
- * Warning, this is not a drop in replacement for mod_auth_dbm,
- * for people wanting to switch from dbm to Berkeley DB.
- * It requires the use of AuthDBUserFile and AuthDBGroupFile
- * instead of AuthDBMUserFile AuthDBMGroupFile
- *
- * Also, in the configuration file you need to specify
- * db_auth_module rather than dbm_auth_module
- *
- * On some BSD systems (e.g. FreeBSD and NetBSD) dbm is automatically
- * mapped to Berkeley DB. You can use either mod_auth_dbm or
- * mod_auth_db. The latter makes it more obvious that it's Berkeley.
- * On other platforms where you want to use the DB library you
- * usually have to install it first. See http://www.sleepycat.com/
- * for the distribution. The interface this module uses is the
- * one from DB version 1.85 and 1.86, but DB version 2.x
- * can also be used when compatibility mode is enabled.
- *
- * 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 <db.h>
-
- #if defined(DB_VERSION_MAJOR) && (DB_VERSION_MAJOR == 2)
- #define DB2
- #endif
-
- typedef struct {
-
- char *auth_dbpwfile;
- char *auth_dbgrpfile;
- int auth_dbauthoritative;
- } db_auth_config_rec;
-
- static void *create_db_auth_dir_config(pool *p, char *d)
- {
- db_auth_config_rec *sec
- = (db_auth_config_rec *) ap_pcalloc(p, sizeof(db_auth_config_rec));
- sec->auth_dbpwfile = NULL;
- sec->auth_dbgrpfile = NULL;
- sec->auth_dbauthoritative = 1; /* fortress is secure by default */
- return sec;
- }
-
- static const char *set_db_slot(cmd_parms *cmd, void *offset, char *f, char *t)
- {
- if (!t || strcmp(t, "db"))
- return DECLINE_CMD;
-
- return ap_set_file_slot(cmd, offset, f);
- }
-
- static const command_rec db_auth_cmds[] =
- {
- {"AuthDBUserFile", ap_set_file_slot,
- (void *) XtOffsetOf(db_auth_config_rec, auth_dbpwfile),
- OR_AUTHCFG, TAKE1, NULL},
- {"AuthDBGroupFile", ap_set_file_slot,
- (void *) XtOffsetOf(db_auth_config_rec, auth_dbgrpfile),
- OR_AUTHCFG, TAKE1, NULL},
- {"AuthUserFile", set_db_slot,
- (void *) XtOffsetOf(db_auth_config_rec, auth_dbpwfile),
- OR_AUTHCFG, TAKE12, NULL},
- {"AuthGroupFile", set_db_slot,
- (void *) XtOffsetOf(db_auth_config_rec, auth_dbgrpfile),
- OR_AUTHCFG, TAKE12, NULL},
- {"AuthDBAuthoritative", ap_set_flag_slot,
- (void *) XtOffsetOf(db_auth_config_rec, auth_dbauthoritative),
- OR_AUTHCFG, FLAG,
- "Set to 'no' to allow access control to be passed along to lower modules if the userID is not known to this module"},
- {NULL}
- };
-
- module db_auth_module;
-
- static char *get_db_pw(request_rec *r, char *user, const char *auth_dbpwfile)
- {
- DB *f;
- DBT d, q;
- char *pw = NULL;
-
- memset(&d, 0, sizeof(d));
- memset(&q, 0, sizeof(q));
-
- q.data = user;
- q.size = strlen(q.data);
-
- #ifdef DB2
- if (db_open(auth_dbpwfile, DB_HASH, DB_RDONLY, 0664, NULL, NULL, &f) != 0) {
- #else
- if (!(f = dbopen(auth_dbpwfile, O_RDONLY, 0664, DB_HASH, NULL))) {
- #endif
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "could not open db auth file: %s", auth_dbpwfile);
- return NULL;
- }
-
- #ifdef DB2
- if (!((f->get) (f, NULL, &q, &d, 0))) {
- #else
- if (!((f->get) (f, &q, &d, 0))) {
- #endif
- pw = ap_palloc(r->pool, d.size + 1);
- strncpy(pw, d.data, d.size);
- pw[d.size] = '\0'; /* Terminate the string */
- }
-
- #ifdef DB2
- (f->close) (f, 0);
- #else
- (f->close) (f);
- #endif
- 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 DB file; key=username value=password":"groupname[":"anything]
- *
- * mark@telescope.org, 22Sep95
- */
-
- static char *get_db_grp(request_rec *r, char *user, const char *auth_dbgrpfile)
- {
- char *grp_data = get_db_pw(r, user, auth_dbgrpfile);
- 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 db_authenticate_basic_user(request_rec *r)
- {
- db_auth_config_rec *sec =
- (db_auth_config_rec *) ap_get_module_config(r->per_dir_config,
- &db_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_dbpwfile)
- return DECLINED;
-
- if (!(real_pw = get_db_pw(r, c->user, sec->auth_dbpwfile))) {
- if (!(sec->auth_dbauthoritative))
- return DECLINED;
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "DB 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,
- "DB user %s: password mismatch: %s", c->user, r->uri);
- ap_note_basic_auth_failure(r);
- return AUTH_REQUIRED;
- }
- return OK;
- }
-
- /* Checking ID */
-
- static int db_check_auth(request_rec *r)
- {
- db_auth_config_rec *sec =
- (db_auth_config_rec *) ap_get_module_config(r->per_dir_config,
- &db_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_dbgrpfile)
- 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_dbgrpfile) {
- const char *orig_groups, *groups;
- char *v;
-
- if (!(groups = get_db_grp(r, user, sec->auth_dbgrpfile))) {
- if (!(sec->auth_dbauthoritative))
- return DECLINED;
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "user %s not in DB group file %s: %s",
- user, sec->auth_dbgrpfile, 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 db_auth_module =
- {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- create_db_auth_dir_config, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- NULL, /* server config */
- NULL, /* merge server config */
- db_auth_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- db_authenticate_basic_user, /* check_user_id */
- db_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 */
- };
-