| /* ==================================================================== |
| * 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. |
| */ |
| |
| /* This module is triggered by an |
| * |
| * AuthGroupFile standard /path/to/file |
| * |
| * and the presense of a |
| * |
| * require group <list-of-groups> |
| * |
| * In an applicable limit/directory block for that method. |
| * |
| * If there are no AuthGroupFile directives valid for |
| * the request; we DECLINED. |
| * |
| * If the AuthGroupFile is defined; but somehow not |
| * accessible: we SERVER_ERROR (was DECLINED). |
| * |
| * If there are no 'require ' directives defined for |
| * this request then we DECLINED (was OK). |
| * |
| * If there are no 'require ' directives valid for |
| * this request method then we DECLINED. (was OK) |
| * |
| * If there are any 'require group' blocks and we |
| * are not in any group - we HTTP_UNAUTHORIZE |
| * unless we are non-authoritative; in which |
| * case we DECLINED. |
| * |
| */ |
| |
| #include "apr_strings.h" |
| #include "apr_md5.h" /* for apr_password_validate */ |
| |
| #include "ap_config.h" |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_core.h" |
| #include "http_log.h" |
| #include "http_protocol.h" |
| #include "http_request.h" |
| |
| typedef struct { |
| char *groupfile; |
| int authoritative; |
| } authz_groupfile_config_rec; |
| |
| static void *create_authz_groupfile_dir_config(apr_pool_t *p, char *d) |
| { |
| authz_groupfile_config_rec *conf = apr_palloc(p, sizeof(*conf)); |
| |
| conf->groupfile = NULL; |
| conf->authoritative = 1; /* keep the fortress secure by default */ |
| return conf; |
| } |
| |
| static const char *set_authz_groupfile_slot(cmd_parms *cmd, void *offset, const char *f, |
| const char *t) |
| { |
| if (t && strcmp(t, "standard")) { |
| return apr_pstrcat(cmd->pool, "Invalid auth file type: ", t, NULL); |
| } |
| |
| return ap_set_file_slot(cmd, offset, f); |
| } |
| |
| static const command_rec authz_groupfile_cmds[] = |
| { |
| AP_INIT_TAKE12("AuthGroupFile", set_authz_groupfile_slot, |
| (void *)APR_OFFSETOF(authz_groupfile_config_rec, groupfile), |
| OR_AUTHCFG, |
| "text file containing group names and member user IDs"), |
| AP_INIT_FLAG("AuthzGroupFileAuthoritative", ap_set_flag_slot, |
| (void *)APR_OFFSETOF(authz_groupfile_config_rec, |
| authoritative), |
| OR_AUTHCFG, |
| "Set to 'no' to allow access control to be passed along to " |
| "lower modules if the 'require group' fails. (default is " |
| "no)."), |
| {NULL} |
| }; |
| |
| module AP_MODULE_DECLARE_DATA authz_groupfile_module; |
| |
| static apr_status_t groups_for_user(apr_pool_t *p, char *user, char *grpfile, |
| apr_table_t ** out) |
| { |
| ap_configfile_t *f; |
| apr_table_t *grps = apr_table_make(p, 15); |
| apr_pool_t *sp; |
| char l[MAX_STRING_LEN]; |
| const char *group_name, *ll, *w; |
| apr_status_t status; |
| |
| if ((status = ap_pcfg_openfile(&f, p, grpfile)) != APR_SUCCESS) { |
| return status ; |
| } |
| |
| apr_pool_create(&sp, p); |
| |
| while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) { |
| if ((l[0] == '#') || (!l[0])) { |
| continue; |
| } |
| ll = l; |
| apr_pool_clear(sp); |
| |
| group_name = ap_getword(sp, &ll, ':'); |
| |
| while (ll[0]) { |
| w = ap_getword_conf(sp, &ll); |
| if (!strcmp(w, user)) { |
| apr_table_setn(grps, apr_pstrdup(p, group_name), "in"); |
| break; |
| } |
| } |
| } |
| ap_cfg_closefile(f); |
| apr_pool_destroy(sp); |
| |
| *out = grps; |
| return APR_SUCCESS; |
| } |
| |
| /* Checking ID */ |
| |
| static int check_user_access(request_rec *r) |
| { |
| authz_groupfile_config_rec *conf = ap_get_module_config(r->per_dir_config, |
| &authz_groupfile_module); |
| char *user = r->user; |
| int m = r->method_number; |
| int method_restricted = 0; |
| register int x,has_entries; |
| const char *t, *w; |
| apr_table_t *grpstatus; |
| const apr_array_header_t *reqs_arr = ap_requires(r); |
| require_line *reqs; |
| apr_status_t status; |
| |
| if (!reqs_arr) { |
| return DECLINED; /* XXX change from legacy */ |
| } |
| |
| reqs = (require_line *)reqs_arr->elts; |
| |
| /* If there is no group file - then we are not |
| * configured. So decline. |
| */ |
| if (!(conf->groupfile)) |
| return DECLINED; |
| |
| if ((status = groups_for_user(r->pool, user, conf->groupfile, |
| &grpstatus)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, |
| "Could not open group file: %s", conf->groupfile); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| }; |
| |
| has_entries = apr_table_elts(grpstatus)->nelts; |
| |
| for (x = 0; x < reqs_arr->nelts; x++) { |
| |
| if (!(reqs[x].method_mask & (AP_METHOD_BIT << m))) { |
| continue; |
| } |
| method_restricted |= 1; |
| |
| t = reqs[x].requirement; |
| w = ap_getword_white(r->pool, &t); |
| |
| if (!strcmp(w, "group")) { |
| method_restricted |= 2; |
| if (has_entries) { |
| while (t[0]) { |
| w = ap_getword_conf(r->pool, &t); |
| if (apr_table_get(grpstatus, w)) { |
| return OK; |
| } |
| } |
| } |
| } |
| } |
| |
| /* No applicable requires for this method seen at all */ |
| if (method_restricted == 0) { |
| return DECLINED; /* XXX change from legacy */ |
| } |
| |
| /* No applicable "requires group" for this method seen */ |
| if ((method_restricted & 2) == 0) { |
| return DECLINED; |
| } |
| |
| if (!(conf->authoritative)) { |
| return DECLINED; |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, |
| "access to %s failed, reason: user %s not part of the " |
| "'require'ed group(s).", r->uri, user); |
| |
| ap_note_basic_auth_failure(r); |
| return HTTP_UNAUTHORIZED; |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| ap_hook_auth_checker(check_user_access,NULL,NULL,APR_HOOK_MIDDLE); |
| } |
| |
| module AP_MODULE_DECLARE_DATA authz_groupfile_module = |
| { |
| STANDARD20_MODULE_STUFF, |
| create_authz_groupfile_dir_config,/* dir config creater */ |
| NULL, /* dir merger -- default is to override */ |
| NULL, /* server config */ |
| NULL, /* merge server config */ |
| authz_groupfile_cmds, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |
