In-memory credential store with yubikey auth

yubikey, auth
pip install salvus==0.1.14



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


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


-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.


Starting the server:

salvus server

Enter a recognition phrase used to identify that this is the server you trust.

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.

Pinging the server:

salvus ping

Never needs yubikey OTP. The only relevant output is the exit code, zero for server running, non-zero (and a reason on stderr) for connect failed.