Overview

This is a command line util for generating the 6 digit One Time Pin code used commonly in 2 factor auth.

Justification Two factor auth = what you know (password) + what you have (laptop/dev machine).

History

I use to use a docker container for this but my Chromebook can't run docker (no Crostini support yet).

A golang binary is much faster in generating the OTP code and doesn't require a running instance of docker.

Build

I'm using glide for the dependency management. You should too.

Testing

make build

./otp-codegen sweetOTPSecret 123432

Recommendations

• Run the make install command and have $GOPATH/bin in your $PATH, else
• Put the binary somewhere on your $PATH if you want to call it from any shell location.
• Use a script installed on your $PATH (e.g. a github one called github-otp) which contains your OTP secret and call the otp-codegen binary from that to spit out 6 digits to STDOUT.

I like the one liner github-otp | pbcopy on a Macbook which simplifies the login process.