function PhpassHashedPassword::generateSalt

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

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.

Return value

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

File

core/lib/Drupal/Core/Password/PhpassHashedPassword.php, line 106

Class

PhpassHashedPassword

Secure password hashing functions based on the Portable PHP password hashing framework.

Namespace

Code

protected function generateSalt() {
    $output = '$S$';
    // We encode the final log2 iteration count in base 64.
    $output .= static::$ITOA64[$this->countLog2];
    // 6 bytes is the standard salt for a portable phpass hash.
    $output .= $this->base64Encode(random_bytes(6), 6);
    return $output;
}