How do I find the preshared key value on an ASA Firewall?

Thanks to: https://community.cisco.com/

You most likely have the following command enabled:

key config-key password-encryption

you can remove it by using the no version of the command but you will need the "master passphrase" password that was used to create the encryption to be able to decrypt it.

ciscoasa(config)# more system:running-config | in key
 key CISCO

ciscoasa(config)# key config-key password-encryption
New key: ********
Confirm key: ********
ciscoasa(config)#
ciscoasa(config)# more system:running-config | in key
 key 8 J3z3YkeRt3Ciw/ZIpRu93MGHEMM2

There is no easy way to remove it if you do not have the master key...If you MUST have the aaa key you will need to backup your configuration, issue a write erase, and reload.  Then load your configuration again.

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