function _password_generate_salt in Simple LDAP 7.2

Same name and namespace in other branches

1. 7 simple_ldap_user/simple_ldap_user.password.inc \_password_generate_salt()

Generates a random base 64-encoded salt prefixed with settings for the hash.

Proper use of salts may defeat a number of attacks, including:

• The ability to try candidate passwords against multiple hashes at once.
• The ability to use pre-hashed lists of candidate passwords.
• The ability to determine whether two users have the same (or different) password without actually having to guess one of the passwords.

Parameters

integer $count_log2: Integer that determines the number of iterations used in the hashing process. A larger value is more secure, but takes more time to complete.

Return value

string A 12 character string containing the iteration count and a random salt.

1 call to _password_generate_salt()

user_hash_password in simple_ldap_user/simple_ldap_user.password.inc

Hash a password using a secure hash.

File

simple_ldap_user/simple_ldap_user.password.inc, line 99

Secure password hashing functions for user authentication.

Code

function _password_generate_salt($count_log2) {
  $output = '$S$';

  // Ensure that $count_log2 is within set bounds.
  $count_log2 = _password_enforce_log2_boundaries($count_log2);

  // We encode the final log2 iteration count in base 64.
  $itoa64 = _password_itoa64();
  $output .= $itoa64[$count_log2];

  // 6 bytes is the standard salt for a portable phpass hash.
  $output .= _password_base64_encode(drupal_random_bytes(6), 6);
  return $output;
}