JWKs Validation in Golang

jwks_parser.go

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"time"

	"github.com/MicahParks/keyfunc"
	"github.com/golang-jwt/jwt"
)

func main() {
  
	// Get a JWT to parse.
	jwtB64 := "OIDC_ACCESS_TOKEN"

	//################
	// Get the JWKs URL from an environment variable.
	// jwksURL := "OIDC_JWKS_URL"

	// Create the JWKs from the resource at the given URL.
	// jwks, err := keyfunc.Get(jwksURL)
	// if err != nil {
	// 	log.Fatalf("Failed to get the JWKs from the given URL.\nError:%s\n", err.Error())
	// }

	//################

	//********
	// Get the JWKS as JSON.
	var jwksJSON json.RawMessage = []byte("JWKS_URI_KEYS_JSON")

	// //Create the JWKS from the resource at the given URL.
	jwks, err := keyfunc.New(jwksJSON)
	if err != nil {
		log.Fatalf("Failed to create JWKS from resource at the given URL.\nError: %s", err.Error())
	}
	//********
  
	// Parse the JWT.
	token, err := jwt.Parse(jwtB64, jwks.KeyFunc)
	if err != nil {
		log.Fatalf("Failed to parse the JWT.\nError: %s", err.Error())
	}

	// Check if the token is valid.
	if !token.Valid {
		log.Fatalf("The token is not valid.")
	}
	log.Println("The token is valid.")
}