cmd: add handling of HS keys

[greenpau]

cmd: add handling of HS keys

Signed-off-by: Paul Greenberg greenpau@outlook.com

[AlexanderYastrebov]

IMO HS already works as expected:

echo '{"foo":"bar"}' | jwt -alg HS512 -key <(echo -n foobar) -sign - | jwt -verify - -key <(echo -n foobar)

The only thing this change adds is splitting the key on the first whitespace for no reason. If one would like to have the key without whitespace or a newline at the end they should just create it:

echo -n foobarbaz > ~/experimental/jwt/token.key

[greenpau]

IMO HS already works as expected:

@AlexanderYastrebov , it very well may be 😄 But, in imho, <(echo -n foobar) is not a super user-friendly way to pass keys.