Menu callback; process one time login link and redirects to the user page on success.
function user_pass_reset($form, &$form_state, $uid, $timestamp, $hashed_pass, $action = NULL) {
global $user;
// When processing the one-time login link, we have to make sure that a user
// isn't already logged in.
if ($user->uid) {
// The existing user is already logged in. Log them out and reload the
// current page so the password reset process can continue.
if ($user->uid == $uid) {
// Preserve the current destination (if any) and ensure the redirect goes
// back to the current page; any custom destination set in
// hook_user_logout() and intended for regular logouts would not be
// appropriate here.
$destination = array();
if (isset($_GET['destination'])) {
$destination = drupal_get_destination();
}
user_logout_current_user();
unset($_GET['destination']);
drupal_goto(current_path(), array(
'query' => drupal_get_query_parameters() + $destination,
));
}
else {
$reset_link_account = user_load($uid);
if (!empty($reset_link_account)) {
drupal_set_message(t('Another user (%other_user) is already logged into the site on this computer, but you tried to use a one-time link for user %resetting_user. Please <a href="!logout">logout</a> and try using the link again.', array(
'%other_user' => $user->name,
'%resetting_user' => $reset_link_account->name,
'!logout' => url('user/logout'),
)), 'warning');
}
else {
// Invalid one-time link specifies an unknown user.
drupal_set_message(t('The one-time login link you clicked is invalid.'), 'error');
}
drupal_goto();
}
}
else {
// Time out, in seconds, until login URL expires. Defaults to 24 hours =
// 86400 seconds.
$timeout = variable_get('user_password_reset_timeout', 86400);
$current = REQUEST_TIME;
// Some redundant checks for extra security ?
$users = user_load_multiple(array(
$uid,
), array(
'status' => '1',
));
if ($timestamp <= $current && ($account = reset($users))) {
// No time out for first time login.
if ($account->login && $current - $timestamp > $timeout) {
drupal_set_message(t('You have tried to use a one-time login link that has expired. Please request a new one using the form below.'), 'error');
drupal_goto('user/password');
}
elseif ($account->uid && $timestamp >= $account->login && $timestamp <= $current && $hashed_pass == user_pass_rehash($account->pass, $timestamp, $account->login, $account->uid)) {
// First stage is a confirmation form, then login
if ($action == 'login') {
// Set the new user.
$user = $account;
// user_login_finalize() also updates the login timestamp of the
// user, which invalidates further use of the one-time login link.
user_login_finalize();
watchdog('user', 'User %name used one-time login link at time %timestamp.', array(
'%name' => $account->name,
'%timestamp' => $timestamp,
));
drupal_set_message(t('You have just used your one-time login link. It is no longer necessary to use this link to log in. Please change your password.'));
// Let the user's password be changed without the current password check.
$token = drupal_random_key();
$_SESSION['pass_reset_' . $user->uid] = $token;
drupal_goto('user/' . $user->uid . '/edit', array(
'query' => array(
'pass-reset-token' => $token,
),
));
}
else {
$form['message'] = array(
'#markup' => t('<p>This is a one-time login for %user_name and will expire on %expiration_date.</p><p>Click on this button to log in to the site and change your password.</p>', array(
'%user_name' => $account->name,
'%expiration_date' => format_date($timestamp + $timeout),
)),
);
$form['help'] = array(
'#markup' => '<p>' . t('This login can be used only once.') . '</p>',
);
$form['actions'] = array(
'#type' => 'actions',
);
$form['actions']['submit'] = array(
'#type' => 'submit',
'#value' => t('Log in'),
);
$form['#action'] = url("user/reset/{$uid}/{$timestamp}/{$hashed_pass}/login");
return $form;
}
}
else {
drupal_set_message(t('You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.'), 'error');
drupal_goto('user/password');
}
}
else {
// Deny access, no more clues.
// Everything will be in the watchdog's URL for the administrator to check.
drupal_access_denied();
drupal_exit();
}
}
}