function user_needs_new_hash

Check whether a user's hashed password needs to be replaced with a new hash.

This is typically called during the login process when the plain text password is available. A new hash is needed when the desired iteration count has changed through a change in the variable password_count_log2 or DRUPAL_HASH_COUNT or if the user's password hash was generated in an update like user_update_7000().

Alternative implementations of this function might use other criteria based on the fields in $account.


$account: A user object with at least the fields from the {users} table.

Return value


2 calls to user_needs_new_hash()
PasswordHashingTest::testPasswordHashing in drupal/modules/simpletest/tests/password.test
Test password hashing.
user_authenticate in drupal/modules/user/user.module
Try to validate the user's login credentials locally.


drupal/includes/, line 282
Secure password hashing functions for user authentication.


function user_needs_new_hash($account) {

  // Check whether this was an updated password.
  if (substr($account->pass, 0, 3) != '$S$' || strlen($account->pass) != DRUPAL_HASH_LENGTH) {
    return TRUE;

  // Ensure that $count_log2 is within set bounds.
  $count_log2 = _password_enforce_log2_boundaries(variable_get('password_count_log2', DRUPAL_HASH_COUNT));

  // Check whether the iteration count used differs from the standard number.
  return _password_get_count_log2($account->pass) !== $count_log2;