JWT

create.sh

#! /usr/bin/env bash
# creates a JWT in bash

# Static header fields.
HEADER='{
	"type": "JWT",
	"alg": "RS256"
}'

# PAYLOAD=$1

PAYLOAD='{
  "uuid": "TEST",
  "role": "system"
}'

# # Use jq to set the dynamic `iat` and `exp`
# # fields on the payload using the current time.
# # `iat` is set to now, and `exp` is now + 1 second.
# PAYLOAD=$(
# 	echo "${payload}")

function b64enc() { openssl enc -base64 -A | tr '+/' '-_' | tr -d '='; }

function rs_sign() { openssl dgst -binary -sha256 -sign ./private.pem ; }

JWT_HDR_B64="$(echo -n "$HEADER" | b64enc)"
JWT_PAY_B64="$(echo -n "$PAYLOAD" | b64enc)"
UNSIGNED_JWT="$JWT_HDR_B64.$JWT_PAY_B64"
SIGNATURE=$(echo -n "$UNSIGNED_JWT" | rs_sign | b64enc)

echo "$UNSIGNED_JWT.$SIGNATURE"