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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/>.
- *
- */
-
- /********
- Add to Configuration file:
- Module external_auth_module mod_auth_external.o
-
- Add to server configuration file:
- AddExternalAuth <keyword> <path-to-authenticator>
- AddExternalGroup <keyword> <path-to-group-checker>
-
- Usage in auth config files:
-
- AuthExternal <keyword>
- AuthExternal afs
- GroupExternal <keyword>
- GroupExternal unix
-
- AuthExternals are passed the userid and passwd in the USER and PASS
- environment variables, and return a success code of 0 to indicate
- successful authentication. Non-zero result indicates either a failure to
- authenticate, or a failure to execute the authenticator.
-
- GroupExternals are passed the userid and desired group in the USER and GROUP
- environment variables, and return a success code of 0 to indicate successful
- authentication. Non-zero result indicates non-membersip or a failure
- to execute the group checker.
-
- The need for this module arises from difficulties I have had linking
- apache with other libraries (such as AFS, and database access libs).
-
- Comments/questions/etc. to nneul@umr.edu
-
- ********/
-
- /*
- * External authentication module by nneul@umr.edu
- */
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_core.h"
- #include "http_log.h"
- #include "http_protocol.h"
- #include <sys/wait.h>
-
- /*
- * Structure for the module itself
- */
-
- module external_auth_module;
-
- /*
- * Data types for per-dir and server configuration
- */
- typedef struct
- {
- char *auth_extname;
- char *group_extname;
- } extauth_dir_config_rec;
-
- typedef struct
- {
- table *auth_externals;
- table *group_externals;
- } extauth_server_config_rec;
-
- /*
- * Creators for per-dir and server configurations
- */
-
- void *create_extauth_dir_config (pool *p, char *d)
- {
- return pcalloc (p, sizeof(extauth_dir_config_rec));
- }
-
-
- void *create_extauth_server_config ( pool *p, server_rec *s)
- {
- extauth_server_config_rec *scr;
-
- scr = (extauth_server_config_rec *) palloc(p,
- sizeof(extauth_server_config_rec) );
-
- scr->auth_externals = make_table(p, 4);
- scr->group_externals = make_table(p, 4);
-
- return (void *)scr;
- }
-
- /*
- * Handler for a server config line - add a external type to the
- * server configuration
- */
-
- char *add_extauth(cmd_parms *cmd, void *dummy, char *keyword, char *path)
- {
- extauth_server_config_rec *sc_rec;
-
- sc_rec = get_module_config( cmd->server->module_config,
- &external_auth_module);
-
- table_set ( sc_rec->auth_externals, keyword, path );
-
- return NULL;
- }
-
- /*
- * Handler for a server config line - add a external type to the
- * server configuration
- */
-
- char *add_extgroup(cmd_parms *cmd, void *dummy, char *keyword, char *path)
- {
- extauth_server_config_rec *sc_rec;
-
- sc_rec = get_module_config( cmd->server->module_config,
- &external_auth_module);
-
- table_set ( sc_rec->group_externals, keyword, path );
-
- return NULL;
- }
-
-
- /*
- * Commands that this module can handle
- */
-
- command_rec extauth_cmds[] = {
- { "AuthExternal", set_string_slot,
- (void*)XtOffsetOf(extauth_dir_config_rec,auth_extname),
- OR_AUTHCFG, TAKE1, "a keyword indicating which authenticator to use" },
-
- { "AddExternalAuth", add_extauth, NULL, RSRC_CONF, TAKE2,
- "a keyword followed by a path to the authenticator program" },
-
- { "GroupExternal", set_string_slot,
- (void*)XtOffsetOf(extauth_dir_config_rec,group_extname),
- OR_AUTHCFG, TAKE1, "a keyword indicating which group checker to use" },
-
- { "AddExternalGroup", add_extgroup, NULL, RSRC_CONF, TAKE2,
- "a keyword followed by a path to the group check program" },
- { NULL }
- };
-
-
-
-
- /*
- * Authenticate a user
- */
-
- int extauth_basic_user (request_rec *r)
- {
- extauth_dir_config_rec *dir_config_rec =
- (extauth_dir_config_rec *)get_module_config (r->per_dir_config,
- &external_auth_module);
-
- extauth_server_config_rec *server_config_rec =
- (extauth_server_config_rec *)get_module_config (r->server->module_config,
- &external_auth_module);
-
- char *sent_pw;
-
- char errstr[MAX_STRING_LEN];
- char env_user[MAX_STRING_LEN];
- char env_pass[MAX_STRING_LEN];
- int res, code;
- char *external, *extname, *extpath;
-
- conn_rec *c = r->connection;
-
- /* Get the password, exit if can't get */
- if ((res = get_basic_auth_pw (r, &sent_pw)))
- return res;
-
- /* Extract which external was chosen */
- extname = dir_config_rec->auth_extname;
-
- /* Check if we are supposed to handle this authentication */
- if ( !extname )
- {
- return DECLINED;
- }
-
-
- /* Get the path associated with that external */
- if (extpath = table_get (server_config_rec->auth_externals, extname))
- {
- /* Set envir vars for the userid and password */
- sprintf(env_user, "%s=%s", "USER", c->user);
- sprintf(env_pass, "%s=%s", "PASS", sent_pw);
- putenv(env_user);
- putenv(env_pass);
-
- code = system(extpath);
-
- if(code)
- {
- sprintf(errstr, "External Auth (%s): Failed (%d) for user %s pass %s",
- extname, code, c->user, sent_pw);
- log_reason(errstr, r->filename, r);
- note_basic_auth_failure(r);
- return AUTH_REQUIRED;
- }
- return OK;
- }
- else
- {
- sprintf(errstr, "External Auth: Invalid external keyword (%s)", extname);
- log_reason(errstr, r->filename, r);
- note_basic_auth_failure(r);
- return AUTH_REQUIRED;
- }
-
-
- /* shouldn't get here */
- return OK;
- }
-
-
- int extauth_check_auth(request_rec *r)
- {
- extauth_dir_config_rec *dir_config_rec =
- (extauth_dir_config_rec *)get_module_config (r->per_dir_config,
- &external_auth_module);
-
- extauth_server_config_rec *server_config_rec =
- (extauth_server_config_rec *)get_module_config (r->server->module_config,
- &external_auth_module);
-
- conn_rec *c = r->connection;
-
- int m = r->method_number;
- char errstr[MAX_STRING_LEN];
-
- char env_user[MAX_STRING_LEN];
- char env_group[MAX_STRING_LEN];
- int res, code;
- char *external, *extname, *extpath;
-
- array_header *reqs_arr = requires (r);
- require_line *reqs = reqs_arr ? (require_line *)reqs_arr->elts : NULL;
-
- int x;
- char *t, *w;
-
- /* Extract which external was chosen */
- extname = dir_config_rec->group_extname;
-
- /* Check if we are supposed to handle this authentication */
- if ( !extname )
- {
- 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 = 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(c->user,w))
- return OK;
- }
- }
- else if( !strcmp(w,"group") )
- {
- while(t[0])
- {
- w = getword(r->pool, &t, ' ');
-
- /* Get the path associated with that external */
- if (extpath = table_get (server_config_rec->group_externals, extname))
- {
- /* Set envir vars for the userid and password */
- sprintf(env_user, "%s=%s", "USER", c->user);
- sprintf(env_group, "%s=%s", "GROUP", w);
- putenv(env_user);
- putenv(env_group);
-
- code = system(extpath);
- if ( !code ) return OK;
- }
- else
- {
- sprintf(errstr, "External Group: Invalid external keyword (%s)", extname);
- log_reason(errstr, r->filename, r);
- note_basic_auth_failure(r);
- return AUTH_REQUIRED;
- }
- }
- }
- }
-
- return DECLINED;
- }
-
-
-
-
- module external_auth_module = {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- create_extauth_dir_config, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- create_extauth_server_config, /* server config */
- NULL, /* merge server config */
- extauth_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- extauth_basic_user, /* check_user_id */
- extauth_check_auth, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- NULL, /* fixups */
- NULL /* logger */
- };
-