list and get password for wifi networks

.bashrc

# Retreive all wifi network
alias listWifiSSID='defaults read /Library/Preferences/SystemConfiguration/com.apple.airport.preferences |grep SSIDString'

# Get the password for that pamater
getWifiPasswordFor(){ security find-generic-password -wa $1}

> security find-generic-password -h
Usage: find-generic-password [-a account] [-s service] [options...] [-g] [keychain...]
    -a  Match "account" string
    -c  Match "creator" (four-character code)
    -C  Match "type" (four-character code)
    -D  Match "kind" string
    -G  Match "value" string (generic attribute)
    -j  Match "comment" string
    -l  Match "label" string
    -s  Match "service" string
    -g  Display the password for the item found
    -w  Display only the password on stdout
If no keychains are specified to search, the default search list is used.
        Find a generic password item.