Upgrading or modifying your ASA and need to see the crypto shared secret. Here is the quick and easy way to do that. From the enable prompt.
pei-hq-fw01# more system:running-config
This will print out the whole running configuration, just like a show running-config, but the shared secrets are in plain text.
tunnel-group 184.108.40.206 type ipsec-l2l
tunnel-group 220.127.116.11 ipsec-attributes
That is all there is to being able to pull the concealed shared secret from an ASA.
Jason Howe, PEI