63080a2001-10-09Martin Nilsson // This is a roxen module. Copyright © 2001, Roxen IS.
8487402001-10-09Per Hedbor #include <module.h> inherit UserDB;
7b43d22001-10-09Per Hedbor inherit "module"; //! A user database module should inherit @[UserDB].
8487402001-10-09Per Hedbor //! //! Which those are will be indicated in the documentation for those //! functions below. Also, please note that a userdb module has to //! have the thread_safe flag set to 1. constant name = "example"; //! The name of the userdatbase, used to identify it from modules or //! htaccess files or similar that wants to authenticate against a //! specific database instead of against any of them. //! //! The name should be reasonably short and should be unique, however, //! nothing will break if more than one database has the same name, it //! will be impossible to know which of them will be used when //! authentication is done, however..
2eab4a2002-10-24Martin Nilsson constant cvs_version = "$Id: userdb_ex.pike,v 1.5 2002/10/23 23:31:44 nilsson Exp $";
2831622002-06-14Martin Nilsson constant module_name = "RefDoc for MODULE_USERDB"; constant module_doc = ("This module does nothing special, it implements a simple " "user database with the passwords and usernames in a string list, " "but its inlined documentation gets imported into the Roxen " "programmer manual.\n" "You definetely don't want to use this module in your virtual " "servers, since anybody with access to your admin interface or " "server configuration file automatically gains access to all " "your passwords. For a budding roxen programmer, the module " "however does show the basics of making a user database module.");
8487402001-10-09Per Hedbor  static void create() // Define a variable that will hold all the users. Only the user id // (the short name) and the password are defined in this list, but it // could easily be extended to include more information. { defvar("users", Variable.StringList(({}), VAR_INITIAL,
2831622002-06-14Martin Nilsson  "Users and Passwords", "A list of username:password pairs."));
8487402001-10-09Per Hedbor } class ExUser //! Each user in the new userdatabase system is represented by a user //! object. { static string id; static string pw; // Passed when this object is created. This is not really enough to // implement all functions below, but it's enough to fulfill the // minimum implementation. inherit User; //! This inherit includes prototypes and some implementations of //! functions this object has to implement. The default //! implementations, if any, are noted below. static void create( string _id, string _pw ) // Set the variables from the constructor arguments and call the // create method in the parent class. { id = _id; pw = _pw; ::create( this_module() ); } string name() //! The name of the user. This is the short name that is used to log //! in. { return id; } string real_name() //! Return the real name of the user. // Since we do not have a real name in this module, the short name // is returned instead. { return id; } string homedir() //! The home directory of the user. Used as an examply by the user //! filesystem. // Since we do not have one here, simply return /. { return "/"; } string crypted_password() //! Used by compat_userinfo(). The default implementation returns //! "x". You do not really have to implement this function. { return "x"; } int uid() //! A numerical UID, or -1 if not applicable { return -1; } int gid() //! A numerical GID, or -1 if not applicable { return -1; } string shell() //! The shell, or 0 if not applicable { return 0; } string gecos() //! The gecos field, the default implementation returns the real //! name. { return real_name(); } int password_authenticate(string password) //! Return 1 if the password is correct, 0 otherwise. The default //! implementation uses the crypted_password() method. // Since our password is in clear text, simply compare it with the // specified one. { return password == pw; } array(string) groups() //! Return all groups this user is a member in. The default //! implementation returns ({}) { // We return a single group, this is the group that all users are // placed in by this module. return ({ "example" }); } } class ExGroup
2eab4a2002-10-24Martin Nilsson //! ExGroup.
8487402001-10-09Per Hedbor { inherit Group; //! All groups should inherit the group class. static void create() // Call the constructor in the parent class. { ::create( this_module() ); } string name() //! The group name { // Our one and only group is named example. return "example"; }
2eab4a2002-10-24Martin Nilsson 
8487402001-10-09Per Hedbor  int gid() //! A numerical GID, or -1 if not applicable { return -1; } array(string) members() //! All users that are members of this group. The default //! implementation loops over all users handled by the user database //! and looks for users with the same gid as this group. { // All our users are members of this group, the default // implementation would work, bit it would be rather inefficient.
63080a2001-10-09Martin Nilsson  return ::list_users();
8487402001-10-09Per Hedbor  } } static ExGroup the_one_and_only_group = ExGroup(); // There can be only one. array(string) list_users( RequestID id ) //! Return a list of all users handled by this database module. {
63080a2001-10-09Martin Nilsson  return column( map( query( "users" ), `/, ":" ), 0 );
8487402001-10-09Per Hedbor } array(string) list_groups( RequestID id ) //! Return a list of all groups handled by this database module. //! The default implementation returns the empty array. { return ({ "example" }); } User find_user( string s, RequestID id ) //! Find a user from her name. { foreach( query( "users" ), string user_line ) // This is not the most optimal implementation, but it will do for // this module. For a real module a cache would be useful. if( has_prefix( user_line, s+":" ) ) return ExUser( @user_line/":" ); return 0; } User find_user_from_uid( int id ) //! Find a user given a UID. The default implementation loops over //! list_users() and checks the uid() of each one. { // Since we do not have any uid:s, simply return 0. return 0; } Group find_group( string group ) //! Find a group object given a group name. //! The default implementation returns 0. { // This is easy in this module, since we only have one group. :-) if( group == "example" ) return the_one_and_only_group; } Group find_group_from_gid( int id ) //! Find a group given a GID. The default implementation loops over //! list_groups() and checks the gid() of each one. { // Again, we do not have gid:s either. return 0; }