gnu-social/actions/recoverpassword.php

<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('LACONICA')) { exit(1); }

# You have 24 hours to claim your password

define(MAX_RECOVERY_TIME, 24 * 60 * 60);

class RecoverpasswordAction extends Action
{

    function handle($args)
    {
        parent::handle($args);
        if (common_logged_in()) {
            $this->client_error(_('You are already logged in!'));
            return;
        } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
            if ($this->arg('recover')) {
                $this->recover_password();
            } else if ($this->arg('reset')) {
                $this->reset_password();
            } else {
                $this->client_error(_('Unexpected form submission.'));
            }
        } else {
            if ($this->trimmed('code')) {
                $this->check_code();
            } else {
                $this->show_form();
            }
        }
    }

    function check_code()
    {

        $code = $this->trimmed('code');
        $confirm = Confirm_address::staticGet('code', $code);

        if (!$confirm) {
            $this->client_error(_('No such recovery code.'));
            return;
        }
        if ($confirm->address_type != 'recover') {
            $this->client_error(_('Not a recovery code.'));
            return;
        }

        $user = User::staticGet($confirm->user_id);

        if (!$user) {
            $this->server_error(_('Recovery code for unknown user.'));
            return;
        }

        $touched = strtotime($confirm->modified);
        $email = $confirm->address;

        # Burn this code

        $result = $confirm->delete();

        if (!$result) {
            common_log_db_error($confirm, 'DELETE', __FILE__);
            common_server_error(_('Error with confirmation code.'));
            return;
        }

        # These should be reaped, but for now we just check mod time
        # Note: it's still deleted; let's avoid a second attempt!

        if ((time() - $touched) > MAX_RECOVERY_TIME) {
            common_log(LOG_WARNING, 
                       'Attempted redemption on recovery code ' .
                       'that is ' . $touched . ' seconds old. ');
            $this->client_error(_('This confirmation code is too old. ' .
                                   'Please start again.'));
            return;
        }

        # If we used an outstanding confirmation to send the email,
        # it's been confirmed at this point.

        if (!$user->email) {
            $orig = clone($user);
            $user->email = $email;
            $result = $user->updateKeys($orig);
            if (!$result) {
                common_log_db_error($user, 'UPDATE', __FILE__);
                $this->server_error(_('Could not update user with confirmed email address.'));
                return;
            }
        }

        # Success!

        $this->set_temp_user($user);
        $this->show_password_form();
    }

    function set_temp_user(&$user)
    {
        common_ensure_session();
        $_SESSION['tempuser'] = $user->id;
    }

    function get_temp_user()
    {
        common_ensure_session();
        $user_id = $_SESSION['tempuser'];
        if ($user_id) {
            $user = User::staticGet($user_id);
        }
        return $user;
    }

    function clear_temp_user()
    {
        common_ensure_session();
        unset($_SESSION['tempuser']);
    }

    function show_top($msg=null)
    {
        if ($msg) {
            $this->element('div', 'error', $msg);
        } else {
            $this->elementStart('div', 'instructions');
            $this->element('p', null, 
                           _('If you\'ve forgotten or lost your' .
                              ' password, you can get a new one sent to' .
                              ' the email address you have stored ' .
                              ' in your account.'));
            $this->elementEnd('div');
        }
    }

    function show_password_top($msg=null)
    {
        if ($msg) {
            $this->element('div', 'error', $msg);
        } else {
            $this->element('div', 'instructions',
                           _('You\'ve been identified. Enter a ' .
                              ' new password below. '));
        }
    }

    function show_form($msg=null)
    {

        common_show_header(_('Recover password'), null,
        $msg, array($this, 'show_top'));

        $this->elementStart('form', array('method' => 'post',
                                           'id' => 'recoverpassword',
                                           'action' => common_local_url('recoverpassword')));
        $this->input('nicknameoremail', _('Nickname or email'),
                     $this->trimmed('nicknameoremail'),
                     _('Your nickname on this server, ' .
                        'or your registered email address.'));
        $this->submit('recover', _('Recover'));
        $this->elementEnd('form');
        common_show_footer();
    }

    function show_password_form($msg=null)
    {

        common_show_header(_('Reset password'), null,
        $msg, array($this, 'show_password_top'));

        $this->elementStart('form', array('method' => 'post',
                                           'id' => 'recoverpassword',
                                           'action' => common_local_url('recoverpassword')));
        $this->hidden('token', common_session_token());
        $this->password('newpassword', _('New password'),
                        _('6 or more characters, and don\'t forget it!'));
        $this->password('confirm', _('Confirm'),
                        _('Same as password above'));
        $this->submit('reset', _('Reset'));
        $this->elementEnd('form');
        common_show_footer();
    }

    function recover_password()
    {
        $nore = $this->trimmed('nicknameoremail');
        if (!$nore) {
            $this->show_form(_('Enter a nickname or email address.'));
            return;
        }

        $user = User::staticGet('email', common_canonical_email($nore));

        if (!$user) {
            $user = User::staticGet('nickname', common_canonical_nickname($nore));
        }

        # See if it's an unconfirmed email address

        if (!$user) {
            $confirm_email = Confirm_address::staticGet('address', common_canonical_email($nore));
            if ($confirm_email && $confirm_email->address_type == 'email') {
                $user = User::staticGet($confirm_email->user_id);
            }
        }

        if (!$user) {
            $this->show_form(_('No user with that email address or username.'));
            return;
        }

        # Try to get an unconfirmed email address if they used a user name

        if (!$user->email && !$confirm_email) {
            $confirm_email = Confirm_address::staticGet('user_id', $user->id);
            if ($confirm_email && $confirm_email->address_type != 'email') {
                # Skip non-email confirmations
                $confirm_email = null;
            }
        }

        if (!$user->email && !$confirm_email) {
            $this->client_error(_('No registered email address for that user.'));
            return;
        }

        # Success! We have a valid user and a confirmed or unconfirmed email address

        $confirm = new Confirm_address();
        $confirm->code = common_confirmation_code(128);
        $confirm->address_type = 'recover';
        $confirm->user_id = $user->id;
        $confirm->address = (isset($user->email)) ? $user->email : $confirm_email->address;

        if (!$confirm->insert()) {
            common_log_db_error($confirm, 'INSERT', __FILE__);
            $this->server_error(_('Error saving address confirmation.'));
            return;
        }

        $body = "Hey, $user->nickname.";
        $body .= "\n\n";
        $body .= 'Someone just asked for a new password ' .
                 'for this account on ' . common_config('site', 'name') . '.';
        $body .= "\n\n";
        $body .= 'If it was you, and you want to confirm, use the URL below:';
        $body .= "\n\n";
        $body .= "\t".common_local_url('recoverpassword',
                                   array('code' => $confirm->code));
        $body .= "\n\n";
        $body .= 'If not, just ignore this message.';
        $body .= "\n\n";
        $body .= 'Thanks for your time, ';
        $body .= "\n";
        $body .= common_config('site', 'name');
        $body .= "\n";

        mail_to_user($user, _('Password recovery requested'), $body, $confirm->address);

        common_show_header(_('Password recovery requested'));
        $this->element('p', null,
                       _('Instructions for recovering your password ' .
                          'have been sent to the email address registered to your ' .
                          'account.'));
        common_show_footer();
    }

    function reset_password()
    {

        # CSRF protection
        $token = $this->trimmed('token');
        if (!$token || $token != common_session_token()) {
            $this->show_form(_('There was a problem with your session token. Try again, please.'));
            return;
        }

        $user = $this->get_temp_user();

        if (!$user) {
            $this->client_error(_('Unexpected password reset.'));
            return;
        }

        $newpassword = $this->trimmed('newpassword');
        $confirm = $this->trimmed('confirm');

        if (!$newpassword || strlen($newpassword) < 6) {
            $this->show_password_form(_('Password must be 6 chars or more.'));
            return;
        }
        if ($newpassword != $confirm) {
            $this->show_password_form(_('Password and confirmation do not match.'));
            return;
        }

        # OK, we're ready to go

        $original = clone($user);

        $user->password = common_munge_password($newpassword, $user->id);

        if (!$user->update($original)) {
            common_log_db_error($user, 'UPDATE', __FILE__);
            common_server_error(_('Can\'t save new password.'));
            return;
        }

        $this->clear_temp_user();

        if (!common_set_user($user->nickname)) {
            common_server_error(_('Error setting user.'));
            return;
        }

        common_real_login(true);

        common_show_header(_('Password saved.'));
        $this->element('p', null, _('New password successfully saved. ' .
                                     'You are now logged in.'));
        common_show_footer();
    }
}