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.
if ($user->uid == $uid) {
drupal_set_message(t('You are logged in as %user. <a href="!user_edit">Change your password.</a>', array(
'%user' => $user->name,
'!user_edit' => url("user/{$user->uid}/edit"),
)));
}
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'),
)));
}
else {
// Invalid one-time link specifies an unknown user.
drupal_set_message(t('The one-time login link you clicked is invalid.'));
}
}
drupal_goto();
}
else {
// Time out, in seconds, until login URL expires.
$timeout = config('user.settings')
->get('password_reset_timeout');
$current = REQUEST_TIME;
$account = user_load($uid);
// Verify that the user exists and is active.
if ($timestamp <= $current && $account && $account->status) {
// No time out for first time login.
if ($account->login && $current - $timestamp > $timeout) {
drupal_set_message(t('You have tried to use a one-time login link that has expired. Please request a new one using the form below.'));
drupal_goto('user/password');
}
elseif ($account->uid && $timestamp >= $account->login && $timestamp <= $current && $hashed_pass == user_pass_rehash($account->pass, $timestamp, $account->login)) {
// First stage is a confirmation form, then login
if ($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_hash_base64(drupal_random_bytes(55));
$_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.'));
drupal_goto('user/password');
}
}
else {
// Deny access, no more clues.
// Everything will be in the watchdog's URL for the administrator to check.
throw new AccessDeniedHttpException();
}
}
}