If I recall correctly Wordpress uses MD5 encryption (which is not terrible secure)
The salts can be found in the wp-config.php file in the root directory of your installation. You will see something like this:
/**#@+
* Authentication Unique Keys and Salts.
*
* Change these to different unique phrases!
* You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
* You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
*
* @since 2.6.0
*/
define('AUTH_KEY', 'LA4pEuC6IWcV9EjAyzi3FCyXBUeKURhPi3wbMcD5RHv4jBZFXWbb2km7FtydjLV3');
define('SECURE_AUTH_KEY', '2UL3b5e0sFgefRtHW40K2jcg3kTshdRvNhV8mRES3twA00U57qKCrF6c0GIGmQ1S');
define('LOGGED_IN_KEY', 'pGBxMNbsVGq8NvHxNRthhyeFXgONMjLFunOC9nNKAz7UxLIpE87zE6FtrpjH6m0X');
define('NONCE_KEY', 'L9TjZqlA0vRJNLpy5o43uckmiumgQ2Awyzb2EOb32Zq08bOTvBTqmVjxidmm9eUd');
define('AUTH_SALT', '7al1GNnKsVMkTQZa1T08Y0QqJPnEx6RqGSZtfnlxlZehFAoNnlpomeTtRTYiDnP8');
define('SECURE_AUTH_SALT', 'w9wRLYZvPqY7t1Oxd6ylpRmPPon9aMOMSOD0GuiZFbd20QsrxER5HkO6cNNj2zYn');
define('LOGGED_IN_SALT', 'iqzHyAgX98Zed0A6qyxtwxGvV2PImFgtEgV32xQr2mHBscYoq0aiGRHHDJEBWmXb');
define('NONCE_SALT', 'eYvJ2L5yv3we9xJXeMEkiH1EdXf51bUPWO9Iy0aggdXab1hrTkXtFGTv8kmzFEcr');
I have never actually tried to do what you are looking to do but sure it wont be too difficult to work out which salt to use and when