Throwpass allows you to easily and safely transport passwords from your phone's password manager to a shared computer, such as at a library.
Go to https://throwpass.com on the shared computer, scan the QR code there with the app, paste your password into the app and click send. Then it's right there on the computer for you to copy.
It's end to end encrypted using an asymmetric key generated in the browser. The QR code contains the public key.
Only needs internet and camera permissions.