In-memory credential store with yubikey auth

## Project description

In-memory credential store with yubikey authorization.

Stores a set of ID and VALUE for each KEY. Usually ID is the username and VALUE is the password. Neither field may contain newlines.

## Command line interface

Usage:

salvus serve [daemon] [noauth] [-p PORT] [-e EXPIRY]
salvus auth [-p PORT]
salvus get <KEY> [-a]
salvus set <KEY> <ID> [-a]
salvus list [-a]
salvus kill

Options:

-h, --help

This help

-p PORT

Port to listen to (always on localhost) [default: 59999]

-e EXPIRY

Auth expiry in seconds, if 0 then get, set and list requires -a [default: 3600]

-a

Add auth to each command, so requires yubikey OTP

## Interpreting the output

All errors are printed on stderr and the exit code will be non-zero.

If exit code is zero, the output will either be blank or in the case of get two lines, first the ID and second the secret.

When yubikey OTP (one time password) is needed, the prompt is output on stderr, so it can be separated from the desired output.

## Examples

Starting the server:

salvus server

Touch the yubikey and the server starts on the default port.

Setting a credential:

salvus set github philipbergen

You will be prompted on stdout to enter the secret, press enter when you are done.

Getting a credential:

salvus get github

First line in the output on stdout is the ID (username) and the second is the secret (password).

If you have set up zero expiry (auth on each request), then you need to add -a to each call to get, set or list. In the case of get, you can separate prompts from results easily, since results are the only thing on stdout:

salvus get github -a > userpass

That will output Please touch the yubikey: on stderr, and the file userpass will contain two lines, the first is the username and the second line is password.

Killing the server:

salvus kill

This obviously requires yubikey OTP.

## Obvious flaw

TODO:

If the server is killed and a logger is started in its place, there will be no way for the user to determine that. Some phrase known only to the user could be set during server start and returned for verification upon presentation of yubikey OTP.

## Project details

Uploaded source