PwCalc is an app built with Flask to generate passwords.
The app combines 2 strings and generates a SHA512 hash. The hash then gets converted to a BASE64 string of which only the first 16 characters are used.
The application is containerized and runs on Port 3333 to where the user connects via the webbrowser.
See more Info in the chapter Container versions.
The main application is written in Python and uses Flask for the web interface and the Docker API to make requests to the Docker Engine.
The user sends two values via a form to the back-end. The application then sends the values via a post request to the runner container. The runner then sends back the resulting password to the web interface where the user can access it.
The runner is written in Golang and generates a "password" from the two values it gets from the web interface. It exposes the password in its output where the main application can read it and pass it back to the user. The runner itself is a container too.
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ckevi/pwcalc:1.0 : This version doesn't use a runner. Instead it does all the work in the same application. This is generally faster. Also the container does not run as root. This version can also be run in Kubernetes and OpenShift since it doesn't rely on the Docker API.
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ckevi/pwcalc:2.2-root : This version uses the runner (ckevi/pwcalc-runner) to create the password. It must run as root since the Docker UNIX-Socket can only be accessed by a root user in the container.
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ckevi/pwcalc:3.0-root : This version sends post requests to ckevi/pwcalc-runner:2.0. Note that this verison requires version 2.0 of the runner container. This version is theoretically can work w/o root since it doesn't rely on the docker UNIX socket anymore.