@base64d fails with base64 encoded string without padding

[sebthom]

Describe the bug
I am trying to use yq to decode the payload of a JWT token.

While this works with jq using

$ jq -R 'split(".") | .[1] | @base64d | fromjson' <<< "$MY_TOKEN"
{
  //...
}

It fails with yq:

$ yq 'split(".") | .[1] | @base64d | fromjson' <<< "$MY_TOKEN"
Error: unexpected EOF

yq fails because JWT tokens consist of base64 components that are not padded using equals signs.

$ echo "dGVzdA==" | yq "@base64d"
test
$ echo "dGVzdA" | yq "@base64d"
Error: unexpected EOF

Version of yq: 4.30.8
Operating systems: mac/linux/windows
Installed via: binary release

Actual behavior

$ echo "dGVzdA" | yq "@base64d"
Error: unexpected EOF

Expected behavior

yq can handle base64 strings that are not padded.

$ echo "dGVzdA" | yq "@base64d"
test # this should be returned

Additional context
Add any other context about the problem here.

[mikefarah]

Released in 4.32.1 - Thanks again @teejaded :)