| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2002 The Apache Software Foundation. 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" 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 name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``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 SOFTWARE FOUNDATION 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 Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * originally written at the National Center for Supercomputing Applications, |
| * University of Illinois, Urbana-Champaign. |
| */ |
| |
| /* |
| * 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 userid 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. |
| */ |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| #include "apr_strings.h" |
| #include "apr_dbm.h" |
| #include "apr_md5.h" |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_core.h" |
| #include "http_log.h" |
| #include "http_protocol.h" |
| #include "http_request.h" /* for ap_hook_(check_user_id | auth_checker)*/ |
| |
| typedef struct { |
| char *grpfile; |
| char *dbmtype; |
| int authoritative; |
| } authz_dbm_config_rec; |
| |
| /* This should go into APR; perhaps with some nice |
| * caching/locking/flocking of the open dbm file. |
| * |
| * Duplicated in mod_auth_dbm.c |
| */ |
| static apr_status_t get_dbm_entry_as_str(request_rec *r, char *user, |
| char *auth_dbmfile, char *dbtype, |
| char ** str) |
| { |
| apr_dbm_t *f; |
| apr_datum_t d, q; |
| char *pw = NULL; |
| apr_status_t retval; |
| q.dptr = user; |
| |
| #ifndef NETSCAPE_DBM_COMPAT |
| q.dsize = strlen(q.dptr); |
| #else |
| q.dsize = strlen(q.dptr) + 1; |
| #endif |
| |
| retval = apr_dbm_open_ex(&f, dbtype, auth_dbmfile, APR_DBM_READONLY, |
| APR_OS_DEFAULT, r->pool); |
| |
| if (retval != APR_SUCCESS) { |
| return retval; |
| } |
| |
| *str = NULL; |
| |
| if (apr_dbm_fetch(f, q, &d) == APR_SUCCESS && d.dptr) { |
| *str = apr_palloc(r->pool, d.dsize + 1); |
| strncpy(pw, d.dptr, d.dsize); |
| *str[d.dsize] = '\0'; /* Terminate the string */ |
| } |
| |
| apr_dbm_close(f); |
| |
| return retval; |
| } |
| |
| static void *create_authz_dbm_dir_config(apr_pool_t *p, char *d) |
| { |
| authz_dbm_config_rec *conf = apr_palloc(p, sizeof(*conf)); |
| |
| conf->grpfile = NULL; |
| conf->dbmtype = "default"; |
| conf->authoritative = 1; /* fortress is secure by default */ |
| |
| return conf; |
| } |
| |
| static const command_rec authz_dbm_cmds[] = |
| { |
| AP_INIT_TAKE1("AuthDBMGroupFile", ap_set_file_slot, |
| (void *)APR_OFFSETOF(authz_dbm_config_rec, grpfile), |
| OR_AUTHCFG, "database file containing group names and member user IDs"), |
| AP_INIT_TAKE1("AuthzDBMType", ap_set_string_slot, |
| (void *)APR_OFFSETOF(authz_dbm_config_rec, dbmtype), |
| OR_AUTHCFG, "what type of DBM file the group file is"), |
| AP_INIT_FLAG("AuthzDBMAuthoritative", ap_set_flag_slot, |
| (void *)APR_OFFSETOF(authz_dbm_config_rec, authoritative), |
| OR_AUTHCFG, "Set to 'no' to allow access control to be passed along to " |
| "lower modules, if the group required is not found or empty, or the user " |
| " is not in the required groups. (default is yes.)"), |
| {NULL} |
| }; |
| |
| module AP_MODULE_DECLARE_DATA authz_dbm_module; |
| |
| /* 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 apr_status_t get_dbm_grp(request_rec *r, char *user, char *dbmgrpfile, |
| char *dbtype, const char ** out) |
| { |
| char *grp_data; |
| char *grp_colon; |
| char *grp_colon2; |
| |
| apr_status_t status = get_dbm_entry_as_str(r, user, dbmgrpfile, |
| dbtype, &grp_data); |
| |
| if (status != APR_SUCCESS) { |
| return status; |
| } |
| |
| *out = NULL; |
| |
| if (grp_data == NULL) { |
| return APR_SUCCESS; |
| } |
| |
| if ((grp_colon = strchr(grp_data, ':')) != NULL) { |
| grp_colon2 = strchr(++grp_colon, ':'); |
| if (grp_colon2) { |
| *grp_colon2 = '\0'; |
| } |
| *out = grp_colon; |
| return APR_SUCCESS; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| /* Checking ID */ |
| static int dbm_check_auth(request_rec *r) |
| { |
| authz_dbm_config_rec *conf = ap_get_module_config(r->per_dir_config, |
| &authz_dbm_module); |
| char *user = r->user; |
| int m = r->method_number; |
| int required = 0; |
| const apr_array_header_t *reqs_arr = ap_requires(r); |
| require_line *reqs = reqs_arr ? (require_line *) reqs_arr->elts : NULL; |
| register int x; |
| const char *t; |
| char *w; |
| apr_status_t status; |
| |
| if (!conf->grpfile) { |
| return DECLINED; |
| } |
| |
| if (!reqs_arr) { |
| return DECLINED; |
| } |
| |
| for (x = 0; x < reqs_arr->nelts; x++) { |
| |
| required |= 1; |
| |
| if (!(reqs[x].method_mask & (AP_METHOD_BIT << m))) { |
| continue; |
| } |
| |
| t = reqs[x].requirement; |
| w = ap_getword_white(r->pool, &t); |
| |
| if (!strcmp(w, "group")) { |
| const char *orig_groups, *groups; |
| char *v; |
| |
| required |= 2; |
| |
| status = get_dbm_grp(r, user, conf->grpfile, conf->dbmtype, |
| &groups); |
| |
| if (status != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, |
| "could not open dbm (type %s) group access file: %s", |
| conf->dbmtype, conf->grpfile); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (groups == NULL) { |
| if (!conf->authoritative) { |
| return DECLINED; |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, |
| "user %s not in DBM group file %s: %s", |
| user, conf->grpfile, r->filename); |
| |
| ap_note_basic_auth_failure(r); |
| return HTTP_UNAUTHORIZED; |
| } |
| |
| 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_ERR, 0, r, |
| "user %s not in right group: %s", |
| user, r->filename); |
| ap_note_basic_auth_failure(r); |
| return HTTP_UNAUTHORIZED; |
| } |
| } |
| |
| return DECLINED; |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| ap_hook_auth_checker(dbm_check_auth, NULL, NULL, APR_HOOK_MIDDLE); |
| } |
| |
| module AP_MODULE_DECLARE_DATA authz_dbm_module = |
| { |
| STANDARD20_MODULE_STUFF, |
| create_authz_dbm_dir_config, /* dir config creater */ |
| NULL, /* dir merger --- default is to override */ |
| NULL, /* server config */ |
| NULL, /* merge server config */ |
| authz_dbm_cmds, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |
