/
authentication_api.php
1179 lines (1019 loc) · 34.2 KB
/
authentication_api.php
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<?php
# MantisBT - A PHP based bugtracking system
# MantisBT 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.
#
# MantisBT 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 MantisBT. If not, see <http://www.gnu.org/licenses/>.
/**
* Authentication API
*
* @package CoreAPI
* @subpackage AuthenticationAPI
* @copyright Copyright 2000 - 2002 Kenzaburo Ito - kenito@300baud.org
* @copyright Copyright 2002 MantisBT Team - mantisbt-dev@lists.sourceforge.net
* @link http://www.mantisbt.org
*
* @uses access_api.php
* @uses config_api.php
* @uses constant_inc.php
* @uses crypto_api.php
* @uses current_user_api.php
* @uses database_api.php
* @uses error_api.php
* @uses gpc_api.php
* @uses helper_api.php
* @uses html_api.php
* @uses lang_api.php
* @uses ldap_api.php
* @uses print_api.php
* @uses session_api.php
* @uses string_api.php
* @uses tokens_api.php
* @uses user_api.php
* @uses utility_api.php
*/
require_api( 'access_api.php' );
require_api( 'config_api.php' );
require_api( 'constant_inc.php' );
require_api( 'crypto_api.php' );
require_api( 'current_user_api.php' );
require_api( 'database_api.php' );
require_api( 'error_api.php' );
require_api( 'gpc_api.php' );
require_api( 'helper_api.php' );
require_api( 'html_api.php' );
require_api( 'lang_api.php' );
require_api( 'ldap_api.php' );
require_api( 'print_api.php' );
require_api( 'session_api.php' );
require_api( 'string_api.php' );
require_api( 'tokens_api.php' );
require_api( 'user_api.php' );
require_api( 'utility_api.php' );
# @global array $g_script_login_cookie
$g_script_login_cookie = null;
# @global array $g_cache_anonymous_user_cookie_string
$g_cache_anonymous_user_cookie_string = null;
# @global array $g_cache_cookie_valid
$g_cache_cookie_valid = null;
# @global int $g_cache_current_user_id
$g_cache_current_user_id = null;
/**
* Gets set of flags for authentication for the specified user.
* @param int|null|bool $p_user_id The user id or null for logged in user or NO_USER/false for user that doesn't exist
* in the system, that may be auto-provisioned.
* @param string $p_username The username or email
* @return AuthFlags The auth flags object to use.
*/
function auth_flags( $p_user_id = null, $p_username = '' ) {
if( is_null( $p_user_id ) ) {
# If user id is not provided and user is not authenticated return default flags.
# Otherwise, we can get into a loop as in #22740
if( !auth_is_user_authenticated() ) {
return new AuthFlags();
}
$t_user_id = auth_get_current_user_id();
} else {
$t_user_id = (int)$p_user_id;
}
if( !$t_user_id && is_blank( $p_username ) ) {
# If user is not in db, must supply the name.
trigger_error( ERROR_GENERIC, ERROR );
}
if( $t_user_id ) {
$t_username = user_get_name( $t_user_id );
$t_email = user_get_email( $t_user_id );
} else {
$t_username = $p_username;
# If the plugin cares about email, then it can check if user typed the email address
# as the username.
$t_email = '';
}
$t_event_arguments = array(
'user_id' => $t_user_id,
'username' => $t_username,
'email' => $t_email,
);
static $s_flags_cache = array();
if( !isset( $s_flags_cache[$t_user_id] ) ) {
$t_flags = event_signal( 'EVENT_AUTH_USER_FLAGS', array( $t_event_arguments ) );
# Don't cache in case of user not in db.
if( $t_user_id ) {
$s_flags_cache[$t_user_id] = $t_flags;
}
} else {
$t_flags = $s_flags_cache[$t_user_id];
}
if( is_null( $t_flags ) ) {
$t_flags = new AuthFlags();
}
return $t_flags;
}
/**
* The message to show to indicate to user that password is managed elsewhere.
* @return string The message.
*/
function auth_password_managed_elsewhere_message() {
$t_auth_flags = auth_flags();
return $t_auth_flags->getPasswordManagedExternallyMessage();
}
/**
* Check if permanent login is enabled.
* @param int|bool $p_user_id The user id, or NO_USER/false for unknown user.
* @param string $p_username The username user typed in sign-in form.
* @return boolean true: yes, false: otherwise.
*/
function auth_allow_perm_login( $p_user_id, $p_username ) {
$t_auth_flags = auth_flags( $p_user_id, $p_username );
return $t_auth_flags->getPermSessionEnabled();
}
/**
* Check if signup is enabled.
* @return bool true: enabled, false otherwise.
*/
function auth_signup_enabled() {
return config_get_global( 'allow_signup' );
}
/**
* Get the access level for users that signup.
* @return integer The access level to use.
*/
function auth_signup_access_level() {
return config_get( 'default_new_account_access_level' );
}
/**
* Anonymous login enabled.
* @return bool true: enabled; false: otherwise.
*/
function auth_anonymous_enabled() {
return config_get_global( 'allow_anonymous_login' );
}
/**
* Get the anonymous account username.
* @return string Anonymous account username.
*/
function auth_anonymous_account() {
return config_get_global( 'anonymous_account' );
}
/**
* Get the auth cookie expiry time.
* @param boolean $p_perm_login Use permanent login.
* @return integer cookie lifetime or 0 for browser session.
*/
function auth_session_expiry( $p_perm_login ) {
$t_auth_flags = auth_flags();
$t_perm_login = $p_perm_login;
if( !$t_auth_flags->getPermSessionEnabled() ) {
$t_perm_login = false;
}
if( $t_perm_login ) {
$t_lifetime = $t_auth_flags->getPermSessionLifetime();
} else {
$t_lifetime = $t_auth_flags->getSessionLifetime();
}
return $t_lifetime == 0 ? 0 : time() + $t_lifetime;
}
/**
* Gets the login page to redirect to when login is needed, it will return a relative url.
* @param string $p_query_string query string parameters.
* @return string login page (e.g. 'login_page.php' )
*/
function auth_login_page( $p_query_string = '' ) {
$t_auth_flags = auth_flags();
$t_login_page = $t_auth_flags->getLoginPage();
return helper_url_combine( $t_login_page, $p_query_string );
}
/**
* Gets the page that asks the user for credentials based on the user's authentication model.
*
* @param string $p_query_string The query string, can be empty.
* @param int|null $p_user_id The user id or null for current logged in user.
* @param string $p_username The username
* @return string The credentials page with query string.
*/
function auth_credential_page( $p_query_string, $p_user_id = null, $p_username = '' ) {
$t_auth_flags = auth_flags( $p_user_id, $p_username );
return $t_auth_flags->getCredentialsPage( $p_query_string );
}
/**
* Gets the logout page to redirect to for logging out the user, it will return a relative url
* @return string logout page (e.g. 'logout_page.php' )
*/
function auth_logout_page() {
$t_auth_flags = auth_flags();
return $t_auth_flags->getLogoutPage();
}
/**
* Gets the page to redirect to after logout.
* @return string the logout redirect page.
*/
function auth_logout_redirect_page() {
$t_auth_flags = auth_flags();
return $t_auth_flags->getLogoutRedirectPage();
}
/**
* Checks if specified user can set their own password.
* @param integer|null $p_user_id The user id or null for logged in user or 0 for signup scenarios.
* @return bool true: can set password, false: otherwise.
*/
function auth_can_set_password( $p_user_id = null ) {
$t_auth_flags = auth_flags( $p_user_id );
if( !$t_auth_flags->getCanUseStandardLogin() ) {
return false;
}
return helper_call_custom_function( 'auth_can_change_password', array() );
}
/**
* Checks if specified user can use standard login (e.g. username and password).
* @param integer|null $p_user_id The user id or null for logged in user.
* @return bool true: can login using username and passord, false otherwise.
*/
function auth_can_use_standard_login( $p_user_id = null ) {
$t_auth_flags = auth_flags( $p_user_id );
return $t_auth_flags->getCanUseStandardLogin();
}
/**
* Check that there is a user logged-in and authenticated
* If the user's account is disabled they will be logged out
* If there is no user logged in, redirect to the login page
* If parameter is given it is used as a URL to redirect to following
* successful login. If none is given, the URL of the current page is used
* @param string $p_return_page Page to redirect to following successful logon, defaults to current page.
* @access public
* @return void
*/
function auth_ensure_user_authenticated( $p_return_page = '' ) {
# if logged in
if( auth_is_user_authenticated() ) {
# check for access enabled
# This also makes sure the cookie is valid
if( OFF == current_user_get_field( 'enabled' ) ) {
print_header_redirect( auth_logout_page() );
}
} else {
# not logged in
if( is_blank( $p_return_page ) ) {
if( !isset( $_SERVER['REQUEST_URI'] ) ) {
$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . '?' . $_SERVER['QUERY_STRING'];
}
$p_return_page = $_SERVER['REQUEST_URI'];
}
$p_return_page = string_url( $p_return_page );
print_header_redirect( auth_login_page( 'return=' . $p_return_page ) );
}
}
/**
* Return true if there is a currently logged in and authenticated user, false otherwise
*
* @return boolean
* @access public
*/
function auth_is_user_authenticated() {
global $g_cache_cookie_valid, $g_login_anonymous;
if( $g_cache_cookie_valid == true ) {
return $g_cache_cookie_valid;
}
$g_cache_cookie_valid = auth_is_cookie_valid( auth_get_current_user_cookie( $g_login_anonymous ) );
return $g_cache_cookie_valid;
}
/**
* prepare/override the username provided from logon form (if necessary)
* @todo when we rewrite authentication api for plugins, this should be merged with prepare_password and return some object
* @param string $p_username Username.
* @return string|null prepared username
* @access public
*/
function auth_prepare_username( $p_username ) {
$t_username = null;
switch( config_get( 'login_method' ) ) {
case BASIC_AUTH:
$t_username = $_SERVER['REMOTE_USER'];
break;
case HTTP_AUTH:
if( !auth_http_is_logout_pending() ) {
if( isset( $_SERVER['PHP_AUTH_USER'] ) ) {
$t_username = $_SERVER['PHP_AUTH_USER'];
}
} else {
auth_http_set_logout_pending( false );
auth_http_prompt();
}
break;
default:
$t_username = $p_username;
break;
}
if( !is_null( $t_username ) ) {
$t_username = user_is_name_valid( $t_username ) ? $t_username : null;
}
return $t_username;
}
/**
* prepare/override the password provided from logon form (if necessary)
* @todo when we rewrite authentication api for plugins, this should be merged with prepare_username and return some object
* @param string $p_password Password.
* @return string prepared password
* @access public
*/
function auth_prepare_password( $p_password ) {
switch( config_get( 'login_method' ) ) {
case BASIC_AUTH:
$f_password = $_SERVER['PHP_AUTH_PW'];
break;
case HTTP_AUTH:
if( !auth_http_is_logout_pending() ) {
# this will never get hit - see auth_prepare_username
if( isset( $_SERVER['PHP_AUTH_PW'] ) ) {
$f_password = $_SERVER['PHP_AUTH_PW'];
}
} else {
auth_http_set_logout_pending( false );
auth_http_prompt();
# calls exit
return null;
}
break;
default:
$f_password = $p_password;
break;
}
return $f_password;
}
/**
* In the case where a user is attempting to authenticate but doesn't exist.
* Check if the authentication provider supports auto-creation of users and
* whether the password matches.
*
* @param string $p_username A prepared username.
* @param string $p_password A prepared password.
* @return int|boolean user id or false in case of failure.
* @access private
*/
function auth_auto_create_user( $p_username, $p_password ) {
$t_login_method = config_get( 'login_method' );
if( $t_login_method == BASIC_AUTH ) {
$t_auto_create = true;
} else if( $t_login_method == LDAP && ldap_authenticate_by_username( $p_username, $p_password ) ) {
$t_auto_create = true;
} else {
$t_auto_create = false;
}
if( $t_auto_create ) {
# attempt to create the user
$t_cookie_string = user_create( $p_username, md5( $p_password ) );
if( $t_cookie_string === false ) {
# it didn't work
return false;
}
# ok, we created the user, get the row again
return user_get_id_by_name( $p_username );
}
return false;
}
/**
* Given a login username provided by the user via the web UI or our API,
* get the user id. The login username can be a username or an email address.
* The email address will work as long there is a single enabled account with
* such address and it is not blank.
*
* @param string $p_login_name The login name.
* @return integer|boolean user id or false.
*/
function auth_get_user_id_from_login_name( $p_login_name ) {
$t_user_id = user_get_id_by_name( $p_login_name );
# If user is not found by name, check by email as long as there is only
# a single match.
if( $t_user_id === false &&
!is_blank( $p_login_name ) &&
config_get_global( 'email_login_enabled' ) &&
email_is_valid( $p_login_name ) ) {
$t_user_ids_by_email = user_get_enabled_ids_by_email( $p_login_name );
if ( count( $t_user_ids_by_email ) == 1 ) {
$t_user_id = $t_user_ids_by_email[0];
}
}
return $t_user_id;
}
/**
* Attempt to login the user with the given password
* If the user fails validation, false is returned
* If the user passes validation, the cookies are set and
* true is returned. If $p_perm_login is true, the long-term
* cookie is created.
* @param string $p_username A prepared username.
* @param string $p_password A prepared password.
* @param boolean $p_perm_login Whether to create a long-term cookie.
* @return boolean indicates if authentication was successful
* @access public
*/
function auth_attempt_login( $p_username, $p_password, $p_perm_login = false ) {
$t_user_id = auth_get_user_id_from_login_name( $p_username );
if( $t_user_id === false ) {
$t_user_id = auth_auto_create_user( $p_username, $p_password );
if( $t_user_id === false ) {
return false;
}
}
# max. failed login attempts achieved...
if( !user_is_login_request_allowed( $t_user_id ) ) {
return false;
}
# check for anonymous login
if( !user_is_anonymous( $t_user_id ) ) {
# anonymous login didn't work, so check the password
if( !auth_does_password_match( $t_user_id, $p_password ) ) {
user_increment_failed_login_count( $t_user_id );
return false;
}
}
return auth_login_user( $t_user_id, $p_perm_login );
}
/**
* Login the user with the specified id, if enabled. This is typically used by auth plugins.
* @param integer $p_user_id The user id.
* @param boolean $p_perm_login Whether to create a long-term cookie.
* @return bool true: success; false; otherwise.
*/
function auth_login_user( $p_user_id, $p_perm_login = false ) {
# check for disabled account
if( !user_is_enabled( $p_user_id ) ) {
return false;
}
# ok, we're good to login now
# increment login count
user_increment_login_count( $p_user_id );
user_reset_failed_login_count_to_zero( $p_user_id );
user_reset_lost_password_in_progress_count_to_zero( $p_user_id );
# set the cookies
auth_set_cookies( $p_user_id, $p_perm_login );
auth_set_tokens( $p_user_id );
return true;
}
/**
* Impersonates the specified user by logging in.
*
* @param int $p_user_id The user id.
* @return void
*/
function auth_impersonate( $p_user_id ) {
auth_ensure_can_impersonate( $p_user_id );
auth_set_cookies( $p_user_id, /* perm_login */ false );
auth_set_tokens( $p_user_id );
}
/**
* Check whether the logged in user can impersonate the specified user.
*
* @param int $p_user_id The user id to be impersonated.
* @return bool true: can impersonate, false: can't.
*/
function auth_can_impersonate( $p_user_id ) {
if( !access_has_global_level( config_get( 'impersonate_user_threshold' ) ) ) {
return false;
}
# User can't impersonate themselves
if( $p_user_id == auth_get_current_user_id() ) {
return false;
}
return true;
}
/**
* Ensure that the logged in user can impersonate the specified user. If not,
* then an error page will be generated.
*
* @param int $p_user_id The user id to be impersonated.
* @return void.
*/
function auth_ensure_can_impersonate( $p_user_id ) {
if( !auth_can_impersonate( $p_user_id ) ) {
access_denied();
}
}
/**
* Allows scripts to login using a login name or ( login name + password )
*
* There are multiple scenarios where this is used:
* - Anonymous login (blank username supplied).
* - Anonymous login with anonymous user name specified.
* - Anonymous login with account not existing or disabled.
* - Pre-authenticated user via some secret hash from email verify or rss feed, where username
* is specified but password is null.
* - Standard authentication with username and password specified.
*
* @param string $p_username Username.
* @param string $p_password Password.
* @return boolean indicates if authentication was successful
* @access public
*/
function auth_attempt_script_login( $p_username, $p_password = null ) {
global $g_script_login_cookie;
$t_username = $p_username;
$t_password = $p_password;
$t_anon_allowed = auth_anonymous_enabled();
if( $t_anon_allowed == ON ) {
$t_anonymous_account = auth_anonymous_account();
} else {
$t_anonymous_account = '';
}
# if no user name supplied, then attempt to login as anonymous user.
if( is_blank( $t_username ) || ( strcasecmp( $t_username, $t_anonymous_account ) == 0 ) ) {
if( $t_anon_allowed == OFF ) {
return false;
}
$t_username = $t_anonymous_account;
# do not use password validation.
$t_password = null;
}
$t_user_id = auth_get_user_id_from_login_name( $t_username );
if( $t_user_id === false ) {
$t_user_id = auth_auto_create_user( $t_username, $p_password );
if( $t_user_id === false ) {
return false;
}
}
$t_user = user_get_row( $t_user_id );
# check for disabled account
if( OFF == $t_user['enabled'] ) {
return false;
}
# validate password if supplied
if( null !== $t_password ) {
if( !auth_does_password_match( $t_user_id, $t_password ) ) {
return false;
}
}
# ok, we're good to login now
# With cases like RSS feeds and MantisConnect there is a login per operation, hence, there is no
# real significance of incrementing login count.
# increment login count
# user_increment_login_count( $t_user_id );
# set the cookies
$g_script_login_cookie = $t_user['cookie_string'];
# cache user id for future reference
current_user_set( $t_user_id );
return true;
}
/**
* Logout the current user and remove any remaining cookies from their browser
* Returns true on success, false otherwise
* @access public
* @return void
*/
function auth_logout() {
global $g_cache_current_user_id, $g_cache_cookie_valid;
# clear cached userid
user_clear_cache( $g_cache_current_user_id );
current_user_set( null );
$g_cache_cookie_valid = null;
# clear cookies, if they were set
if( auth_clear_cookies() ) {
helper_clear_pref_cookies();
}
if( HTTP_AUTH == config_get( 'login_method' ) ) {
auth_http_set_logout_pending( true );
}
session_clean();
}
/**
* Identicates whether to bypass logon form e.g. when using http authentication
* @return boolean true: by pass, false: show form.
* @access public
*/
function auth_automatic_logon_bypass_form() {
return config_get( 'login_method' ) == HTTP_AUTH;
}
/**
* Return the user's password maximum length for the current login method
*
* @return integer
* @access public
*/
function auth_get_password_max_size() {
switch( config_get( 'login_method' ) ) {
# Max password size cannot be bigger than the database field
case PLAIN:
case BASIC_AUTH:
case HTTP_AUTH:
return DB_FIELD_SIZE_PASSWORD;
# All other cases, i.e. password is stored as a hash
default:
return PASSWORD_MAX_SIZE_BEFORE_HASH;
}
}
/**
* Return true if the password for the user id given matches the given
* password (taking into account the global login method)
* @param integer $p_user_id User id to check password against.
* @param string $p_test_password Password.
* @return boolean indicating whether password matches given the user id
* @access public
*/
function auth_does_password_match( $p_user_id, $p_test_password ) {
$t_configured_login_method = config_get( 'login_method' );
if( LDAP == $t_configured_login_method ) {
return ldap_authenticate( $p_user_id, $p_test_password );
}
if( !auth_can_use_standard_login( $p_user_id ) ) {
return false;
}
$t_password = user_get_field( $p_user_id, 'password' );
$t_login_methods = array(
MD5,
CRYPT,
PLAIN,
BASIC_AUTH,
);
foreach( $t_login_methods as $t_login_method ) {
# pass the stored password in as the salt
if( auth_process_plain_password( $p_test_password, $t_password, $t_login_method ) == $t_password ) {
# Do not support migration to PLAIN, since this would be a crazy thing to do.
# Also if we do, then a user will be able to login by providing the MD5 value
# that is copied from the database. See #8467 for more details.
if( ( $t_configured_login_method != PLAIN && $t_login_method == PLAIN ) ||
( $t_configured_login_method != BASIC_AUTH && $t_login_method == BASIC_AUTH ) ) {
continue;
}
# Check for migration to another login method and test whether the password was encrypted
# with our previously insecure implementation of the CRYPT method
if( ( $t_login_method != $t_configured_login_method ) || (( CRYPT == $t_configured_login_method ) && utf8_substr( $t_password, 0, 2 ) == utf8_substr( $p_test_password, 0, 2 ) ) ) {
user_set_password( $p_user_id, $p_test_password, true );
}
return true;
}
}
return false;
}
/**
* Encrypt and return the plain password given, as appropriate for the current
* global login method.
*
* When generating a new password, no salt should be passed in.
* When encrypting a password to compare to a stored password, the stored
* password should be passed in as salt. If the authentication method is CRYPT then
* crypt() will extract the appropriate portion of the stored password as its salt
*
* @param string $p_password Password.
* @param string $p_salt Salt, defaults to null.
* @param string $p_method Logon method, defaults to null (use configuration login method).
* @return string processed password, maximum DB_FIELD_SIZE_PASSWORD chars in length
* @access public
*/
function auth_process_plain_password( $p_password, $p_salt = null, $p_method = null ) {
$t_login_method = config_get( 'login_method' );
if( $p_method !== null ) {
$t_login_method = $p_method;
}
switch( $t_login_method ) {
case CRYPT:
# a null salt is the same as no salt, which causes a salt to be generated
# otherwise, use the salt given
$t_processed_password = crypt( $p_password, $p_salt );
break;
case MD5:
$t_processed_password = md5( $p_password );
break;
case BASIC_AUTH:
case PLAIN:
default:
$t_processed_password = $p_password;
break;
}
# cut this off to DB_FIELD_SIZE_PASSWORD characters which the largest possible string in the database
return utf8_substr( $t_processed_password, 0, DB_FIELD_SIZE_PASSWORD );
}
/**
* Generate a random 16 character password.
* @todo create memorable passwords?
* @return string 16 character random password
* @access public
*/
function auth_generate_random_password() {
return crypto_generate_uri_safe_nonce( 16 );
}
/**
* Generate a confirmation code to validate password reset requests.
* @param integer $p_user_id User ID to generate a confirmation code for.
* @return string Confirmation code (384bit) encoded according to the base64 with URI safe alphabet approach described in RFC4648
* @access public
*/
function auth_generate_confirm_hash( $p_user_id ) {
$t_password = user_get_field( $p_user_id, 'password' );
$t_last_visit = user_get_field( $p_user_id, 'last_visit' );
$t_confirm_hash_raw = hash( 'whirlpool', 'confirm_hash' . config_get_global( 'crypto_master_salt' ) . $t_password . $t_last_visit, true );
# Note: We truncate the last 8 bits from the hash output so that base64
# encoding can be performed without any trailing padding.
$t_confirm_hash_base64_encoded = base64_encode( substr( $t_confirm_hash_raw, 0, 63 ) );
$t_confirm_hash = strtr( $t_confirm_hash_base64_encoded, '+/', '-_' );
return $t_confirm_hash;
}
/**
* Set login cookies for the user
* If $p_perm_login is true, a long-term cookie is created
* @param integer $p_user_id An user identifier.
* @param boolean $p_perm_login Indicates whether to generate a long-term cookie.
* @access public
* @return void
*/
function auth_set_cookies( $p_user_id, $p_perm_login = false ) {
$t_cookie_string = user_get_field( $p_user_id, 'cookie_string' );
$t_cookie_name = config_get( 'string_cookie' );
gpc_set_cookie( $t_cookie_name, $t_cookie_string, auth_session_expiry( $p_perm_login ) );
}
/**
* Clear login cookies, return true if they were cleared
* @return boolean indicating whether cookies were cleared
* @access public
*/
function auth_clear_cookies() {
global $g_script_login_cookie, $g_cache_cookie_valid;
$t_cookies_cleared = false;
$g_cache_cookie_valid = null;
# clear cookie, if not logged in from script
if( $g_script_login_cookie == null ) {
$t_cookie_name = config_get( 'string_cookie' );
$t_cookie_path = config_get( 'cookie_path' );
gpc_clear_cookie( $t_cookie_name, $t_cookie_path );
$t_cookies_cleared = true;
} else {
$g_script_login_cookie = null;
}
return $t_cookies_cleared;
}
/**
* Generate a random and unique string to use as the identifier for the login
* cookie.
* @return string Random and unique 384bit cookie string of encoded according to the base64 with URI safe alphabet approach described in RFC4648
* @access public
*/
function auth_generate_unique_cookie_string() {
do {
$t_cookie_string = crypto_generate_uri_safe_nonce( 64 );
} while( !auth_is_cookie_string_unique( $t_cookie_string ) );
return $t_cookie_string;
}
/**
* Return true if the cookie login identifier is unique, false otherwise
* @param string $p_cookie_string Cookie string.
* @return boolean indicating whether cookie string is unique
* @access public
*/
function auth_is_cookie_string_unique( $p_cookie_string ) {
db_param_push();
$t_query = 'SELECT COUNT(*) FROM {user} WHERE cookie_string=' . db_param();
$t_result = db_query( $t_query, array( $p_cookie_string ) );
$t_count = db_result( $t_result );
if( $t_count > 0 ) {
return false;
} else {
return true;
}
}
/**
* Return the current user login cookie string,
* note that the cookie cached by a script login superceeds the cookie provided by
* the browser. This shouldn't normally matter, except that the password verification uses
* this routine to bypass the normal authentication, and can get confused when a normal user
* logs in, then runs the verify script. the act of fetching config variables may get the wrong
* userid.
* if no user is logged in and anonymous login is enabled, returns cookie for anonymous user
* otherwise returns '' (an empty string)
*
* @param boolean $p_login_anonymous Auto-login anonymous user.
* @return string current user login cookie string
* @access public
*/
function auth_get_current_user_cookie( $p_login_anonymous = true ) {
global $g_script_login_cookie, $g_cache_anonymous_user_cookie_string;
# if logging in via a script, return that cookie
if( $g_script_login_cookie !== null ) {
return $g_script_login_cookie;
}
# fetch user cookie
$t_cookie_name = config_get( 'string_cookie' );
$t_cookie = gpc_get_cookie( $t_cookie_name, '' );
# if cookie not found, and anonymous login enabled, use cookie of anonymous account.
if( is_blank( $t_cookie ) ) {
if( $p_login_anonymous && auth_anonymous_enabled() ) {
if( $g_cache_anonymous_user_cookie_string === null ) {
if( function_exists( 'db_is_connected' ) && db_is_connected() ) {
# get anonymous information if database is available
db_param_push();
$t_query = 'SELECT id, cookie_string FROM {user} WHERE username = ' . db_param();
$t_result = db_query( $t_query, array( auth_anonymous_account() ) );
if( $t_row = db_fetch_array( $t_result ) ) {
$t_cookie = $t_row['cookie_string'];
$g_cache_anonymous_user_cookie_string = $t_cookie;
current_user_set( $t_row['id'] );
}
}
} else {
$t_cookie = $g_cache_anonymous_user_cookie_string;
}
}
}
return $t_cookie;
}
/**
* Set authentication tokens for secure session.
* @param integer $p_user_id User identifier.
* @access public
* @return void
*/
function auth_set_tokens( $p_user_id ) {
$t_auth_token = token_get( TOKEN_AUTHENTICATED, $p_user_id );
if( null == $t_auth_token ) {
token_set( TOKEN_AUTHENTICATED, true, auth_reauthentication_expiry(), $p_user_id );
} else {
token_touch( $t_auth_token['id'], auth_reauthentication_expiry() );
}
}
/**
* Checks if reauthentication is enabled.
* @return bool true: enabled; false: otherwise.
*/
function auth_reauthentication_enabled() {
$t_auth_flags = auth_flags();
return $t_auth_flags->getReauthenticationEnabled();
}
/**
* Gets the reauthentication timeout/expiry.
* @return integer The re-authentication expiry in seconds.
*/
function auth_reauthentication_expiry() {
$t_auth_flags = auth_flags();
return $t_auth_flags->getReauthenticationLifetime();
}
/**
* Check for authentication tokens, and redirect to login page for re-authentication.
* Currently, if using BASIC or HTTP authentication methods, or if logged in anonymously,
* this function will always "authenticate" the user (do nothing).
*
* @return boolean
* @access public
*/
function auth_reauthenticate() {
if( !auth_reauthentication_enabled() || BASIC_AUTH == config_get( 'login_method' ) || HTTP_AUTH == config_get( 'login_method' ) ) {
return true;
}
$t_auth_token = token_get( TOKEN_AUTHENTICATED );
if( null != $t_auth_token ) {
token_touch( $t_auth_token['id'], auth_reauthentication_expiry() );
return true;
} else {
$t_anon_account = auth_anonymous_account();
$t_anon_allowed = auth_anonymous_enabled();
$t_user_id = auth_get_current_user_id();