Decode JWT in bash (OpenShift authentication tokens)

jwt_decode.sh

# https://gist.github.com/thomasdarimont/46358bc8167fce059d83a1ebdb92b0e7?permalink_comment_id=5139846#gistcomment-5139846

function jwt_decode(){
    jq -R 'split(".") | .[1] | @base64d | fromjson |
      # you can replace the "localtime" with "gmttime" if that makes sense
      if .exp then (.expStr = (.exp | localtime | strftime("%Y-%m-%dT%H:%M:%S %Z"))) else . end |
      if .iat then (.iatStr = (.iat | localtime | strftime("%Y-%m-%dT%H:%M:%S %Z"))) else . end |
      if .nbf then (.nbfStr = (.nbf | localtime | strftime("%Y-%m-%dT%H:%M:%S %Z"))) else . end |
    .' <<< "$1"
}