Password Validation Plugin Development

Implementation guide specifically for developers creating logic to intercept and validate password changes in the server.

This page contains background information for MariaDB developers.

Plugin API

Password validation plugin API is very simple. A plugin must implement only one method — validate_password(). This method takes two arguments — user name and the plain-text password. It returns 0 when the password has passed the validation; otherwise, 1.

See also mysql/plugin_password_validation.h and password validation plugins in plugin/simple_password_check/ and plugins/cracklib_password_check/.