JWT Test

auth0jwttest.kt

package foo

import com.auth0.jwt.JWT
import com.auth0.jwt.algorithms.Algorithm
import com.auth0.jwt.exceptions.JWTVerificationException
import org.apache.commons.codec.binary.Base64
import org.junit.Test
import java.security.interfaces.RSAPublicKey
import java.security.spec.RSAPublicKeySpec
import java.math.BigInteger
import java.security.KeyFactory

class AuthTest {

    @Test
    fun testAuth() {
        val token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJzY3AiOlsid3JpdGU6L3N0dWZmIiwicmVhZDpteXNxbDovL2xzc3QtcX" +
            "NlcnY6NDA0MC8iXSwiYXVkIjoiIiwic3ViIjoiYnZhbiIsImlzcyI6Imh0dHBzOi8vZGVtby5zY2l0b2tlbnMub3JnIiwiZXhwIjoxN" +
            "TI3ODAyODE1LCJpYXQiOjE1Mjc4MDIyMTUsIm5iZiI6MTUyNzgwMjIxNSwianRpIjoiZDVkNDA2MGUtOGQ3MS00OThjLTgxYWItZTVk" +
            "ODQyYjVlNWM1In0.oQnL_tRjsu2t3mrNaIyKHIqie7vOyoUQP-drqbEpfUe_nA5RlbWchdo13k07IE-_z-tuaELDzkKJhVY2lYaqc7s" +
            "UiREpa1fakHCh0v9skgvuq_hTf7R3UPcO7AN0D0du1tMx34VbUfMUGJ4nIGUsK6NJnlBzADjxpe5tLU_hJzcnMp2ObETiXqnhMFCoWU" +
            "EDxA4lZl-GeSnQ6k9qKzNXAo2DxOCsMNWszUTKeLgWZgqvTAGerTYwTMzfXfKt6Ul5Ok_TO51Ivwao88tkGuufV2GwsHVsvbK3fDz7W" +
            "BPLpKAo9ofYi28pCfe6cUWAir8j0WfEEL3ggoMfQ0_xWCl9eQ"
        var authenticated = false
        try {
            val publicKey = getDemoPublicKey()

            println(JWT.decode(token).issuer)
            val verifier = JWT
                .require(Algorithm.RSA256(publicKey))
                .withIssuer("https://demo.scitokens.org")
                .acceptLeeway(50000)
                .build()
            val jwt = verifier.verify(token)
            val subject = jwt.subject
            authenticated = true
        } catch (exception: JWTVerificationException) {
            //Invalid signature/claims
            exception.printStackTrace()
        }
    }

    fun getDemoPublicKey(): RSAPublicKey {
        val keyE = "AQAB"
        val keyN = "uGDGTLXnqh3mfopjys6sFUBvFl3F4Qt6NEYphq_u_aBhtN1X9NEyb78uB_I1KjciJNGLIQU0ECsJiFx6qV1hR9xE1dPyrS3bU" +
            "92AVtnBrvzUtTU-aUZAmZQiuAC_rC0-z_TOQr6qJkkUgZtxR9n9op55ZBpRfZD5dzhkW4Dm146vfTKt0D4cIMoMNJS5xQx9nibeB4E8h" +
            "ryZDW_fPeD0XZDcpByNyP0jFDYkxdUtQFvyRpz4WMZ4ejUfvW3gf4LRAfGZJtMnsZ7ZW4RfoQbhiXKMfWeBEjQDiXh0r-KuZLykxhYJt" +
            "pf7fTnPna753IzMgRMmW3F69iQn2LQN3LoSMw=="
        val kf = KeyFactory.getInstance("RSA")
        val modulus = BigInteger(1, Base64.decodeBase64(keyN))
        val exponent = BigInteger(1, Base64.decodeBase64(keyE))
        val key = kf.generatePublic(RSAPublicKeySpec(modulus, exponent))
        return key as RSAPublicKey
    }
}