Joomla encrypted passwords should be stored in user meta key “joomlapass”.
When user is authenticated first time after migration
password provided by user is encrypted by “joomla way”
and compared with value in “joomlapass” meta key.
If password is correct WP user is udated – password encrypted by “wordpress way”
is stored to “user_pass” field.
Then user can be authenticated by standart wordpress authentication plugin.
Meta key “joomlapass” is renamed to “joomlapassbak” to avoid repeatedly updating WP password.
plugin is free for any purpose…
Put question here: http://lovelyland.info/1/joomla2wp-mig-auth-plugin/
No questions at this moment…
I was able to get this to work to successfully import a Joomla 2.5 database, but it required that I add code to support Joomla's newer PHPass-based hashing method. I've posted the updated version of this plugin here if anyone else would also find it helpful!
19.3.2011 – 1.0.0 – first release
27.3.2011 – 1.0.1 – links correction