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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This is the API for handling users.
*
* Note: by design, this class does not do any permission checking.
*/
class user_Core {
public static function get_edit_form($user, $action = NULL) {
$form = new Forge("users/$user->id?_method=put", "", "post", array("id" => "gUserForm"));
$group = $form->group("edit_user")->label(_("Edit User"));
$group->input("uname")->label(_("Name"))->id("gName")->value($user->name);
$group->input("full_name")->label(_("Full Name"))->id("gFullName")->value($user->full_name);
$group->password("password")->label(_("Password"))->id("gPassword");
$group->input("email")->label(_("Email"))->id("gEmail")->value($user->email);
$group->submit(_("Modify"));
$form->add_rules_from($user);
return $form;
}
public static function get_edit_form_admin($user, $action = NULL) {
$form = new Forge("admin/users/edit/$user->id", "", "post", array("id" => "gUserForm"));
$group = $form->group("edit_user")->label(_("Edit User"));
$group->input("uname")->label(_("Name"))->id("gName")->value($user->name);
$group->input("full_name")->label(_("Full Name"))->id("gFullName")->value($user->full_name);
$group->password("password")->label(_("Password"))->id("gPassword");
$group->input("email")->label(_("Email"))->id("gEmail")->value($user->email);
$group->submit(_("Modify"));
$form->add_rules_from($user);
return $form;
}
public static function get_add_form_admin($action = NULL) {
$form = new Forge("admin/users/create");
$group = $form->group("add_user")->label(_("Add User"));
$group->input("name")->label(_("Name"))->id("gName");
$group->input("full_name")->label(_("Full Name"))->id("gFullName");
$group->password("password")->label(_("Password"))->id("gPassword");
$group->input("email")->label(_("Email"))->id("gEmail");
$group->submit(_("Add"));
$user = ORM::factory("user");
$form->add_rules_from($user);
return $form;
}
public static function get_delete_form_admin($user, $action = NULL) {
$form = new Forge($action);
$group = $form->group("delete_user")->label(_("Delete User"));
$group->label(sprintf(_("Are you sure you want to delete %s?"), $user->name));
$group->submit(_("Delete"));
return $form;
}
/**
* Make sure that we have a session and group_ids cached in the session.
*/
public static function load_user() {
// This is one of the first session operations that we'll do, so it may fail if there's no
// install yet. Try to handle this situation gracefully expecting that the scaffolding will
// Do The Right Thing.
//
// @todo get rid of this extra error checking when we have an installer.
try {
$session = Session::instance();
} catch (Exception $e) {
return;
}
if (!($user = $session->get("user"))) {
$session->set("user", $user = user::guest());
}
if (!$session->get("group_ids")) {
$ids = array();
foreach ($user->groups as $group) {
$ids[] = $group->id;
}
$session->set("group_ids", $ids);
}
}
/**
* Return the array of group ids this user belongs to
*
* @return array
*/
public static function group_ids() {
return Session::instance()->get("group_ids", array(1));
}
/**
* Return the active user. If there's no active user, return the guest user.
*
* @return User_Model
*/
public static function active() {
return Session::instance()->get("user", self::guest());
}
/**
* Return the guest user.
*
* @todo consider caching
*
* @return User_Model
*/
public static function guest() {
return model_cache::get("user", 1);
}
/**
* Change the active user.
*
* @return User_Model
*/
public static function set_active($user) {
$session = Session::instance();
$session->set("user", $user);
$session->delete("group_ids");
self::load_user();
}
/**
* Create a new user.
*
* @param string $name
* @param string $full_name
* @param string $password
* @return User_Model
*/
public static function create($name, $full_name, $password) {
$user = ORM::factory("user")->where("name", $name)->find();
if ($user->loaded) {
throw new Exception("@todo USER_ALREADY_EXISTS $name");
}
$user->name = $name;
$user->full_name = $full_name;
$user->password = $password;
// Required groups
$user->add(group::everybody());
$user->add(group::registered_users());
$user->save();
module::event("user_created", $user);
return $user;
}
/**
* Is the password provided correct?
*
* @param user User Model
* @param string $password a plaintext password
* @return boolean true if the password is correct
*/
public static function is_correct_password($user, $password) {
$valid = $user->password;
$salt = substr($valid, 0, 4);
/* Support both old (G1 thru 1.4.0; G2 thru alpha-4) and new password schemes: */
$guess = (strlen($valid) == 32) ? md5($password) : ($salt . md5($salt . $password));
if (!strcmp($guess, $valid)) {
return true;
}
/* Passwords with <&"> created by G2 prior to 2.1 were hashed with entities */
$sanitizedPassword = html::specialchars($password, false);
$guess = (strlen($valid) == 32) ? md5($sanitizedPassword)
: ($salt . md5($salt . $sanitizedPassword));
if (!strcmp($guess, $valid)) {
return true;
}
/* Also support hashes generated by phpass for interoperability with other applications */
if (strlen($valid) == 34) {
$hashGenerator = new PasswordHash(10, true);
return $hashGenerator->CheckPassword($password, $valid);
}
return false;
}
/**
* Create the hashed passwords.
* @param string $password a plaintext password
* @return string hashed password
*/
public static function hash_password($password) {
return user::_md5Salt($password);
}
/**
* Perform the post authentication processing
* @param object $user the user object.
*/
public static function login($user) {
$user->login_count += 1;
$user->last_login = time();
$user->save();
user::set_active($user);
module::event("user_login", $user);
}
public static function logout() {
$user = user::active();
if (!$user->guest) {
try {
Session::instance()->destroy();
} catch (Exception $e) {
Kohana::log("error", $e);
}
module::event("user_logout", $user);
}
}
/**
* Create a hashed password using md5 plus salt.
* @param string $password plaintext password
* @param string $salt (optional) salt or hash containing salt (randomly generated if omitted)
* @return string hashed password
*/
private static function _md5Salt($password, $salt="") {
if (empty($salt)) {
for ($i = 0; $i < 4; $i++) {
$char = mt_rand(48, 109);
$char += ($char > 90) ? 13 : ($char > 57) ? 7 : 0;
$salt .= chr($char);
}
} else {
$salt = substr($salt, 0, 4);
}
return $salt . md5($salt . $password);
}
}
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