freeotp-cli
If you backup org.fedorahosted.freeotp and untar it via
( printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" ; tail -c +25 backup.ab ) | tar xfvz -
or just download the tokens.xml file from your phone, this utility will
allow you to read that file and generate a TOPT from it.
Give only the tokens.xml file, and the avaialble tokens will be listed.
give the tokens.xml file and the name of a token, and the TOTP will be
printed.