UserHelper.php
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<?php
/**
* Joomla! Content Management System
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\User;
defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Access\Access;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\Utilities\ArrayHelper;
/**
* Authorisation helper class, provides static methods to perform various tasks relevant
* to the Joomla user and authorisation classes
*
* This class has influences and some method logic from the Horde Auth package
*
* @since 1.7.0
*/
abstract class UserHelper
{
/**
* Method to add a user to a group.
*
* @param integer $userId The id of the user.
* @param integer $groupId The id of the group.
*
* @return boolean True on success
*
* @since 1.7.0
* @throws \RuntimeException
*/
public static function addUserToGroup($userId, $groupId)
{
// Get the user object.
$user = new User((int) $userId);
// Add the user to the group if necessary.
if (!in_array($groupId, $user->groups))
{
// Check whether the group exists.
$db = \JFactory::getDbo();
$query = $db->getQuery(true)
->select($db->quoteName('id'))
->from($db->quoteName('#__usergroups'))
->where($db->quoteName('id') . ' = ' . (int) $groupId);
$db->setQuery($query);
// If the group does not exist, return an exception.
if ($db->loadResult() === null)
{
throw new \RuntimeException('Access Usergroup Invalid');
}
// Add the group data to the user object.
$user->groups[$groupId] = $groupId;
// Store the user object.
$user->save();
}
// Set the group data for any preloaded user objects.
$temp = User::getInstance((int) $userId);
$temp->groups = $user->groups;
if (\JFactory::getSession()->getId())
{
// Set the group data for the user object in the session.
$temp = \JFactory::getUser();
if ($temp->id == $userId)
{
$temp->groups = $user->groups;
}
}
return true;
}
/**
* Method to get a list of groups a user is in.
*
* @param integer $userId The id of the user.
*
* @return array List of groups
*
* @since 1.7.0
*/
public static function getUserGroups($userId)
{
// Get the user object.
$user = User::getInstance((int) $userId);
return isset($user->groups) ? $user->groups : array();
}
/**
* Method to remove a user from a group.
*
* @param integer $userId The id of the user.
* @param integer $groupId The id of the group.
*
* @return boolean True on success
*
* @since 1.7.0
*/
public static function removeUserFromGroup($userId, $groupId)
{
// Get the user object.
$user = User::getInstance((int) $userId);
// Remove the user from the group if necessary.
$key = array_search($groupId, $user->groups);
if ($key !== false)
{
// Remove the user from the group.
unset($user->groups[$key]);
// Store the user object.
$user->save();
}
// Set the group data for any preloaded user objects.
$temp = \JFactory::getUser((int) $userId);
$temp->groups = $user->groups;
// Set the group data for the user object in the session.
$temp = \JFactory::getUser();
if ($temp->id == $userId)
{
$temp->groups = $user->groups;
}
return true;
}
/**
* Method to set the groups for a user.
*
* @param integer $userId The id of the user.
* @param array $groups An array of group ids to put the user in.
*
* @return boolean True on success
*
* @since 1.7.0
*/
public static function setUserGroups($userId, $groups)
{
// Get the user object.
$user = User::getInstance((int) $userId);
// Set the group ids.
$groups = ArrayHelper::toInteger($groups);
$user->groups = $groups;
// Get the titles for the user groups.
$db = \JFactory::getDbo();
$query = $db->getQuery(true)
->select($db->quoteName('id') . ', ' . $db->quoteName('title'))
->from($db->quoteName('#__usergroups'))
->where($db->quoteName('id') . ' = ' . implode(' OR ' . $db->quoteName('id') . ' = ', $user->groups));
$db->setQuery($query);
$results = $db->loadObjectList();
// Set the titles for the user groups.
for ($i = 0, $n = count($results); $i < $n; $i++)
{
$user->groups[$results[$i]->id] = $results[$i]->id;
}
// Store the user object.
$user->save();
if (session_id())
{
// Set the group data for any preloaded user objects.
$temp = \JFactory::getUser((int) $userId);
$temp->groups = $user->groups;
// Set the group data for the user object in the session.
$temp = \JFactory::getUser();
if ($temp->id == $userId)
{
$temp->groups = $user->groups;
}
}
return true;
}
/**
* Gets the user profile information
*
* @param integer $userId The id of the user.
*
* @return object
*
* @since 1.7.0
*/
public static function getProfile($userId = 0)
{
if ($userId == 0)
{
$user = \JFactory::getUser();
$userId = $user->id;
}
// Get the dispatcher and load the user's plugins.
$dispatcher = \JEventDispatcher::getInstance();
PluginHelper::importPlugin('user');
$data = new \JObject;
$data->id = $userId;
// Trigger the data preparation event.
$dispatcher->trigger('onContentPrepareData', array('com_users.profile', &$data));
return $data;
}
/**
* Method to activate a user
*
* @param string $activation Activation string
*
* @return boolean True on success
*
* @since 1.7.0
*/
public static function activateUser($activation)
{
$db = \JFactory::getDbo();
// Let's get the id of the user we want to activate
$query = $db->getQuery(true)
->select($db->quoteName('id'))
->from($db->quoteName('#__users'))
->where($db->quoteName('activation') . ' = ' . $db->quote($activation))
->where($db->quoteName('block') . ' = 1')
->where($db->quoteName('lastvisitDate') . ' = ' . $db->quote($db->getNullDate()));
$db->setQuery($query);
$id = (int) $db->loadResult();
// Is it a valid user to activate?
if ($id)
{
$user = User::getInstance((int) $id);
$user->set('block', '0');
$user->set('activation', '');
// Time to take care of business.... store the user.
if (!$user->save())
{
\JLog::add($user->getError(), \JLog::WARNING, 'jerror');
return false;
}
}
else
{
\JLog::add(\JText::_('JLIB_USER_ERROR_UNABLE_TO_FIND_USER'), \JLog::WARNING, 'jerror');
return false;
}
return true;
}
/**
* Returns userid if a user exists
*
* @param string $username The username to search on.
*
* @return integer The user id or 0 if not found.
*
* @since 1.7.0
*/
public static function getUserId($username)
{
// Initialise some variables
$db = \JFactory::getDbo();
$query = $db->getQuery(true)
->select($db->quoteName('id'))
->from($db->quoteName('#__users'))
->where($db->quoteName('username') . ' = ' . $db->quote($username));
$db->setQuery($query, 0, 1);
return $db->loadResult();
}
/**
* Hashes a password using the current encryption.
*
* @param string $password The plaintext password to encrypt.
* @param integer $algorithm The hashing algorithm to use, represented by `PASSWORD_*` constants.
* @param array $options The options for the algorithm to use.
*
* @return string The encrypted password.
*
* @since 3.2.1
*/
public static function hashPassword($password, $algorithm = PASSWORD_BCRYPT, array $options = array())
{
// \JCrypt::hasStrongPasswordSupport() includes a fallback for us in the worst case
\JCrypt::hasStrongPasswordSupport();
return password_hash($password, $algorithm, $options);
}
/**
* Formats a password using the current encryption. If the user ID is given
* and the hash does not fit the current hashing algorithm, it automatically
* updates the hash.
*
* @param string $password The plaintext password to check.
* @param string $hash The hash to verify against.
* @param integer $user_id ID of the user if the password hash should be updated
*
* @return boolean True if the password and hash match, false otherwise
*
* @since 3.2.1
*/
public static function verifyPassword($password, $hash, $user_id = 0)
{
$passwordAlgorithm = PASSWORD_BCRYPT;
// If we are using phpass
if (strpos($hash, '$P$') === 0)
{
// Use PHPass's portable hashes with a cost of 10.
$phpass = new \PasswordHash(10, true);
$match = $phpass->CheckPassword($password, $hash);
$rehash = true;
}
// Check for Argon2id hashes
elseif (strpos($hash, '$argon2id') === 0)
{
// This implementation is not supported through any existing polyfills
$match = password_verify($password, $hash);
$rehash = password_needs_rehash($hash, PASSWORD_ARGON2ID);
$passwordAlgorithm = PASSWORD_ARGON2ID;
}
// Check for Argon2i hashes
elseif (strpos($hash, '$argon2i') === 0)
{
// This implementation is not supported through any existing polyfills
$match = password_verify($password, $hash);
$rehash = password_needs_rehash($hash, PASSWORD_ARGON2I);
$passwordAlgorithm = PASSWORD_ARGON2I;
}
// Check for bcrypt hashes
elseif (strpos($hash, '$2') === 0)
{
// \JCrypt::hasStrongPasswordSupport() includes a fallback for us in the worst case
\JCrypt::hasStrongPasswordSupport();
$match = password_verify($password, $hash);
$rehash = password_needs_rehash($hash, PASSWORD_BCRYPT);
}
elseif (substr($hash, 0, 8) == '{SHA256}')
{
// Check the password
$parts = explode(':', $hash);
$salt = @$parts[1];
$testcrypt = static::getCryptedPassword($password, $salt, 'sha256', true);
$match = \JCrypt::timingSafeCompare($hash, $testcrypt);
$rehash = true;
}
else
{
// Check the password
$parts = explode(':', $hash);
$salt = @$parts[1];
$rehash = true;
// Compile the hash to compare
// If the salt is empty AND there is a ':' in the original hash, we must append ':' at the end
$testcrypt = md5($password . $salt) . ($salt ? ':' . $salt : (strpos($hash, ':') !== false ? ':' : ''));
$match = \JCrypt::timingSafeCompare($hash, $testcrypt);
}
// If we have a match and rehash = true, rehash the password with the current algorithm.
if ((int) $user_id > 0 && $match && $rehash)
{
$user = new User($user_id);
$user->password = static::hashPassword($password, $passwordAlgorithm);
$user->save();
}
return $match;
}
/**
* Formats a password using the old encryption methods.
*
* @param string $plaintext The plaintext password to encrypt.
* @param string $salt The salt to use to encrypt the password. []
* If not present, a new salt will be
* generated.
* @param string $encryption The kind of password encryption to use.
* Defaults to md5-hex.
* @param boolean $show_encrypt Some password systems prepend the kind of
* encryption to the crypted password ({SHA},
* etc). Defaults to false.
*
* @return string The encrypted password.
*
* @since 1.7.0
* @deprecated 4.0
*/
public static function getCryptedPassword($plaintext, $salt = '', $encryption = 'md5-hex', $show_encrypt = false)
{
// Get the salt to use.
$salt = static::getSalt($encryption, $salt, $plaintext);
// Encrypt the password.
switch ($encryption)
{
case 'plain':
return $plaintext;
case 'sha':
$encrypted = base64_encode(mhash(MHASH_SHA1, $plaintext));
return ($show_encrypt) ? '{SHA}' . $encrypted : $encrypted;
case 'crypt':
case 'crypt-des':
case 'crypt-md5':
case 'crypt-blowfish':
return ($show_encrypt ? '{crypt}' : '') . crypt($plaintext, $salt);
case 'md5-base64':
$encrypted = base64_encode(mhash(MHASH_MD5, $plaintext));
return ($show_encrypt) ? '{MD5}' . $encrypted : $encrypted;
case 'ssha':
$encrypted = base64_encode(mhash(MHASH_SHA1, $plaintext . $salt) . $salt);
return ($show_encrypt) ? '{SSHA}' . $encrypted : $encrypted;
case 'smd5':
$encrypted = base64_encode(mhash(MHASH_MD5, $plaintext . $salt) . $salt);
return ($show_encrypt) ? '{SMD5}' . $encrypted : $encrypted;
case 'aprmd5':
$length = strlen($plaintext);
$context = $plaintext . '$apr1$' . $salt;
$binary = static::_bin(md5($plaintext . $salt . $plaintext));
for ($i = $length; $i > 0; $i -= 16)
{
$context .= substr($binary, 0, ($i > 16 ? 16 : $i));
}
for ($i = $length; $i > 0; $i >>= 1)
{
$context .= ($i & 1) ? chr(0) : $plaintext[0];
}
$binary = static::_bin(md5($context));
for ($i = 0; $i < 1000; $i++)
{
$new = ($i & 1) ? $plaintext : substr($binary, 0, 16);
if ($i % 3)
{
$new .= $salt;
}
if ($i % 7)
{
$new .= $plaintext;
}
$new .= ($i & 1) ? substr($binary, 0, 16) : $plaintext;
$binary = static::_bin(md5($new));
}
$p = array();
for ($i = 0; $i < 5; $i++)
{
$k = $i + 6;
$j = $i + 12;
if ($j == 16)
{
$j = 5;
}
$p[] = static::_toAPRMD5((ord($binary[$i]) << 16) | (ord($binary[$k]) << 8) | (ord($binary[$j])), 5);
}
return '$apr1$' . $salt . '$' . implode('', $p) . static::_toAPRMD5(ord($binary[11]), 3);
case 'sha256':
$encrypted = ($salt) ? hash('sha256', $plaintext . $salt) . ':' . $salt : hash('sha256', $plaintext);
return ($show_encrypt) ? '{SHA256}' . $encrypted : '{SHA256}' . $encrypted;
case 'md5-hex':
default:
$encrypted = ($salt) ? md5($plaintext . $salt) : md5($plaintext);
return ($show_encrypt) ? '{MD5}' . $encrypted : $encrypted;
}
}
/**
* Returns a salt for the appropriate kind of password encryption using the old encryption methods.
* Optionally takes a seed and a plaintext password, to extract the seed
* of an existing password, or for encryption types that use the plaintext
* in the generation of the salt.
*
* @param string $encryption The kind of password encryption to use.
* Defaults to md5-hex.
* @param string $seed The seed to get the salt from (probably a
* previously generated password). Defaults to
* generating a new seed.
* @param string $plaintext The plaintext password that we're generating
* a salt for. Defaults to none.
*
* @return string The generated or extracted salt.
*
* @since 1.7.0
* @deprecated 4.0
*/
public static function getSalt($encryption = 'md5-hex', $seed = '', $plaintext = '')
{
// Encrypt the password.
switch ($encryption)
{
case 'crypt':
case 'crypt-des':
if ($seed)
{
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 2);
}
else
{
return substr(md5(mt_rand()), 0, 2);
}
break;
case 'sha256':
if ($seed)
{
return preg_replace('|^{sha256}|i', '', $seed);
}
else
{
return static::genRandomPassword(16);
}
break;
case 'crypt-md5':
if ($seed)
{
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 12);
}
else
{
return '$1$' . substr(md5(\JCrypt::genRandomBytes()), 0, 8) . '$';
}
break;
case 'crypt-blowfish':
if ($seed)
{
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 30);
}
else
{
return '$2y$10$' . substr(md5(\JCrypt::genRandomBytes()), 0, 22) . '$';
}
break;
case 'ssha':
if ($seed)
{
return substr(preg_replace('|^{SSHA}|', '', $seed), -20);
}
else
{
return mhash_keygen_s2k(MHASH_SHA1, $plaintext, substr(pack('h*', md5(\JCrypt::genRandomBytes())), 0, 8), 4);
}
break;
case 'smd5':
if ($seed)
{
return substr(preg_replace('|^{SMD5}|', '', $seed), -16);
}
else
{
return mhash_keygen_s2k(MHASH_MD5, $plaintext, substr(pack('h*', md5(\JCrypt::genRandomBytes())), 0, 8), 4);
}
break;
case 'aprmd5': // 64 characters that are valid for APRMD5 passwords.
$APRMD5 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
if ($seed)
{
return substr(preg_replace('/^\$apr1\$(.{8}).*/', '\\1', $seed), 0, 8);
}
else
{
$salt = '';
for ($i = 0; $i < 8; $i++)
{
$salt .= $APRMD5[mt_rand(0, 63)];
}
return $salt;
}
break;
default:
$salt = '';
if ($seed)
{
$salt = $seed;
}
return $salt;
break;
}
}
/**
* Generate a random password
*
* @param integer $length Length of the password to generate
*
* @return string Random Password
*
* @since 1.7.0
*/
public static function genRandomPassword($length = 8)
{
$salt = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$base = strlen($salt);
$makepass = '';
/*
* Start with a cryptographic strength random string, then convert it to
* a string with the numeric base of the salt.
* Shift the base conversion on each character so the character
* distribution is even, and randomize the start shift so it's not
* predictable.
*/
$random = \JCrypt::genRandomBytes($length + 1);
$shift = ord($random[0]);
for ($i = 1; $i <= $length; ++$i)
{
$makepass .= $salt[($shift + ord($random[$i])) % $base];
$shift += ord($random[$i]);
}
return $makepass;
}
/**
* Converts to allowed 64 characters for APRMD5 passwords.
*
* @param string $value The value to convert.
* @param integer $count The number of characters to convert.
*
* @return string $value converted to the 64 MD5 characters.
*
* @since 1.7.0
*/
protected static function _toAPRMD5($value, $count)
{
// 64 characters that are valid for APRMD5 passwords.
$APRMD5 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
$aprmd5 = '';
$count = abs($count);
while (--$count)
{
$aprmd5 .= $APRMD5[$value & 0x3f];
$value >>= 6;
}
return $aprmd5;
}
/**
* Converts hexadecimal string to binary data.
*
* @param string $hex Hex data.
*
* @return string Binary data.
*
* @since 1.7.0
*/
private static function _bin($hex)
{
$bin = '';
$length = strlen($hex);
for ($i = 0; $i < $length; $i += 2)
{
$tmp = sscanf(substr($hex, $i, 2), '%x');
$bin .= chr(array_shift($tmp));
}
return $bin;
}
/**
* Method to remove a cookie record from the database and the browser
*
* @param string $userId User ID for this user
* @param string $cookieName Series id (cookie name decoded)
*
* @return boolean True on success
*
* @since 3.2
* @deprecated 4.0 This is handled in the authentication plugin itself. The 'invalid' column in the db should be removed as well
*/
public static function invalidateCookie($userId, $cookieName)
{
$db = \JFactory::getDbo();
$query = $db->getQuery(true);
// Invalidate cookie in the database
$query
->update($db->quoteName('#__user_keys'))
->set($db->quoteName('invalid') . ' = 1')
->where($db->quoteName('user_id') . ' = ' . $db->quote($userId));
$db->setQuery($query)->execute();
// Destroy the cookie in the browser.
$app = \JFactory::getApplication();
$app->input->cookie->set($cookieName, '', 1, $app->get('cookie_path', '/'), $app->get('cookie_domain', ''));
return true;
}
/**
* Clear all expired tokens for all users.
*
* @return mixed Database query result
*
* @since 3.2
* @deprecated 4.0 This is handled in the authentication plugin itself
*/
public static function clearExpiredTokens()
{
$now = time();
$db = \JFactory::getDbo();
$query = $db->getQuery(true)
->delete('#__user_keys')
->where($db->quoteName('time') . ' < ' . $db->quote($now));
return $db->setQuery($query)->execute();
}
/**
* Method to get the remember me cookie data
*
* @return mixed An array of information from an authentication cookie or false if there is no cookie
*
* @since 3.2
* @deprecated 4.0 This is handled in the authentication plugin itself
*/
public static function getRememberCookieData()
{
// Create the cookie name
$cookieName = static::getShortHashedUserAgent();
// Fetch the cookie value
$app = \JFactory::getApplication();
$cookieValue = $app->input->cookie->get($cookieName);
if (!empty($cookieValue))
{
return explode('.', $cookieValue);
}
else
{
return false;
}
}
/**
* Method to get a hashed user agent string that does not include browser version.
* Used when frequent version changes cause problems.
*
* @return string A hashed user agent string with version replaced by 'abcd'
*
* @since 3.2
*/
public static function getShortHashedUserAgent()
{
$ua = \JFactory::getApplication()->client;
$uaString = $ua->userAgent;
$browserVersion = $ua->browserVersion;
$uaShort = str_replace($browserVersion, 'abcd', $uaString);
return md5(\JUri::base() . $uaShort);
}
/**
* Check if there is a super user in the user ids.
*
* @param array $userIds An array of user IDs on which to operate
*
* @return boolean True on success, false on failure
*
* @since 3.6.5
*/
public static function checkSuperUserInUsers(array $userIds)
{
foreach ($userIds as $userId)
{
foreach (static::getUserGroups($userId) as $userGroupId)
{
if (Access::checkGroup($userGroupId, 'core.admin'))
{
return true;
}
}
}
return false;
}
}