Wi-Fi SSID and Passwords via CLI

    Two built-in MacOS CLI utilities can be used to obtain the currently connected SSID and stored password. airport gets information on currently connected Wi-Fi, security is used to obtain password.

    Using these tools I built a CLI in Rust that to quickly share Wi-Fi passwords and connection details, including QR codes that auto-configure iOS and Android devices, but below is how they work individually.

    Default MacOS airport utility location:


    Sample usage to obtain SSID:

    > airport -I | awk '/ SSID/ {print substr($0, index($0, $2))}'
    Guest WiFi

    security utility can obtain password associated with an SSID (details). Running security provides a login prompt to access keychain, as authentication is required in order to obtain the password.

    > security find-generic-password \
    -D 'AirPort network password' \
    -ga "Guest WiFi" \
    2>&1 >/dev/null
    password: "HelloFriends!"

    The System keychain record for that SSID can be updated so that security is always allowed access to the password. This requires sudo and should only be done for Wi-Fi passwords not considered secret, as will allow this app and others to read the password without being prompted for credentials.

    sudo security add-generic-password -U -a <ssid> -D "AirPort network password" -T "/usr/bin/security" -s "AirPort"  /Library/Keychains/System.keychain