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#!/usr/bin/perl -wT
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Terry Weissman <terry@mozilla.org>
# Gervase Markham <gerv@gerv.net>
# A. Karl Kornel <karl@kornel.name>
use strict;
use lib qw(. lib);
use Bugzilla;
use Bugzilla::Mailer;
use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Token;
use Bugzilla::User;
use Bugzilla::Util;
use Date::Format;
my $template = Bugzilla->template;
my $cgi = Bugzilla->cgi;
my $action = $cgi->param('action') || '';
my $vars = {};
my $target;
if (!$action) {
# redirect to index.cgi if no action is defined.
print $cgi->redirect(correct_urlbase() . 'index.cgi');
exit;
}
# prepare-sudo: Display the sudo information & login page
elsif ($action eq 'prepare-sudo') {
# We must have a logged-in user to do this
# That user must be in the 'bz_sudoers' group
my $user = Bugzilla->login(LOGIN_REQUIRED);
unless ($user->in_group('bz_sudoers')) {
ThrowUserError('auth_failure', { group => 'bz_sudoers',
action => 'begin',
object => 'sudo_session' }
);
}
# Do not try to start a new session if one is already in progress!
if (defined(Bugzilla->sudoer)) {
ThrowUserError('sudo_in_progress', { target => $user->login });
}
# Keep a temporary record of the user visiting this page
$vars->{'token'} = issue_session_token('sudo_prepared');
if ($user->authorizer->can_login) {
my $value = generate_random_password();
my %args;
$args{'-secure'} = 1 if Bugzilla->params->{ssl_redirect};
$cgi->send_cookie(-name => 'Bugzilla_login_request_cookie',
-value => $value,
-httponly => 1,
%args);
# The user ID must not be set when generating the token, because
# that information will not be available when validating it.
local Bugzilla->user->{userid} = 0;
$vars->{'login_request_token'} = issue_hash_token(['login_request', $value]);
}
# Show the sudo page
$vars->{'target_login_default'} = $cgi->param('target_login');
$vars->{'reason_default'} = $cgi->param('reason');
$target = 'admin/sudo.html.tmpl';
}
# begin-sudo: Confirm login and start sudo session
elsif ($action eq 'begin-sudo') {
# We must be sure that the user is authenticating by providing a login
# and password.
# We only need to do this for authentication methods that involve Bugzilla
# directly obtaining a login (i.e. normal CGI login), as opposed to other
# methods (like Environment vars login).
# First, record if Bugzilla_login and Bugzilla_password were provided
my $credentials_provided;
if (defined($cgi->param('Bugzilla_login'))
&& defined($cgi->param('Bugzilla_password')))
{
$credentials_provided = 1;
}
# Next, log in the user
my $user = Bugzilla->login(LOGIN_REQUIRED);
my $target_login = $cgi->param('target_login');
my $reason = $cgi->param('reason') || '';
# At this point, the user is logged in. However, if they used a method
# where they could have provided a username/password (i.e. CGI), but they
# did not provide a username/password, then throw an error.
if ($user->authorizer->can_login && !$credentials_provided) {
ThrowUserError('sudo_password_required',
{ target_login => $target_login, reason => $reason });
}
# The user must be in the 'bz_sudoers' group
unless ($user->in_group('bz_sudoers')) {
ThrowUserError('auth_failure', { group => 'bz_sudoers',
action => 'begin',
object => 'sudo_session' }
);
}
# Do not try to start a new session if one is already in progress!
if (defined(Bugzilla->sudoer)) {
ThrowUserError('sudo_in_progress', { target => $user->login });
}
# Did the user actually go trough the 'sudo-prepare' action? Do some
# checks on the token the action should have left.
my ($token_user, $token_timestamp, $token_data) =
Bugzilla::Token::GetTokenData($cgi->param('token'));
unless (defined($token_user)
&& defined($token_data)
&& ($token_user == $user->id)
&& ($token_data eq 'sudo_prepared'))
{
ThrowUserError('sudo_preparation_required',
{ target_login => $target_login, reason => $reason });
}
delete_token($cgi->param('token'));
# Get & verify the target user (the user who we will be impersonating)
my $target_user = new Bugzilla::User({ name => $target_login });
unless (defined($target_user)
&& $target_user->id
&& $user->can_see_user($target_user))
{
ThrowUserError('user_match_failed', { name => $target_login });
}
if ($target_user->in_group('bz_sudo_protect')) {
ThrowUserError('sudo_protected', { login => $target_user->login });
}
# Calculate the session expiry time (T + 6 hours)
my $time_string = time2str('%a, %d-%b-%Y %T %Z', time + MAX_SUDO_TOKEN_AGE, 'GMT');
# For future sessions, store the unique ID of the target user
my $token = Bugzilla::Token::_create_token($user->id, 'sudo', $target_user->id);
my %args;
if (Bugzilla->params->{ssl_redirect}) {
$args{'-secure'} = 1;
}
$cgi->send_cookie('-name' => 'sudo',
'-expires' => $time_string,
'-value' => $token,
'-httponly' => 1,
%args);
# For the present, change the values of Bugzilla::user & Bugzilla::sudoer
Bugzilla->sudo_request($target_user, $user);
# NOTE: If you want to log the start of an sudo session, do it here.
# If we have a reason passed in, keep it under 200 characters
$reason = substr($reason, 0, 200);
# Go ahead and send out the message now
my $message;
my $mail_template = Bugzilla->template_inner($target_user->setting('lang'));
$mail_template->process('email/sudo.txt.tmpl', { reason => $reason }, \$message);
MessageToMTA($message);
$vars->{'message'} = 'sudo_started';
$vars->{'target'} = $target_user->login;
$target = 'global/message.html.tmpl';
}
# end-sudo: End the current sudo session (if one is in progress)
elsif ($action eq 'end-sudo') {
# Regardless of our state, delete the sudo cookie if it exists
my $token = $cgi->cookie('sudo');
$cgi->remove_cookie('sudo');
# Are we in an sudo session?
Bugzilla->login(LOGIN_OPTIONAL);
my $sudoer = Bugzilla->sudoer;
if (defined($sudoer)) {
Bugzilla->sudo_request($sudoer, undef);
}
# Now that the session is over, remove the token from the DB.
delete_token($token);
# NOTE: If you want to log the end of an sudo session, so it here.
$vars->{'message'} = 'sudo_ended';
$target = 'global/message.html.tmpl';
}
# No valid action found
else {
Bugzilla->login(LOGIN_OPTIONAL);
ThrowUserError('unknown_action', {action => $action});
}
# Display the template
print $cgi->header();
$template->process($target, $vars)
|| ThrowTemplateError($template->error());
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