Keychain bruteforce

[Alis_Klar]

Hi,

 

I have forgotten my MBA admin password!! Have got back into it but locked out of old keychain!

 

I have supervised 33 iPads using that keychain so not sure what to do? Can I re-supervise with a new keychain or can I bruteforce the old keychain password. There is a tool for Leopard but no trace of a tool that works on Yosemite.

 

The only thing I need the old keychain for in the iPad supervision otherwise I can blow it away.

 

I am using find my iPad / iclould lock on these iPads also. Also using Lightspeed MDM.

 

Advice?