jwt-cli command-line tool

This program is based on the original jwt-cli tool that is a part of the "github.com/golang-jwt/jwt/v4" package. There have been a huge number of improvements and changes.

This is a simple tool to sign, verify and show JSON Web Tokens from the command line.

The following will create and sign a token, then verify it and output the original claims:

     echo {\"foo\":\"bar\"} | ./jwt -key ../../test/sample_key -alg RS256 -sign - | ./jwt -key ../../test/sample_key.pub -alg RS256 -verify -

Key files should be in PEM format. Other formats are not supported by this tool.

To simply display a token, use:

    echo $JWT | ./jwt -show -

You can install this tool with the following command:

     go install github.com/dgrijalva/jwt-go/cmd/jwt