const crypto = require('crypto')
const fs = require('fs')
const decrypt = require('./decrypt')

const receivedData = require('./signMessage').packageOfDataToSend

const hash = crypto.createHash(receivedData.algorithm)

const publicKey = fs.readFileSync(__dirname + '/id_rsa_pub.pem', 'utf-8')

// ReceivedData: Hash value
const decryptedMessage = decrypt.decryptWithPublicKey(publicKey, receivedData.signedAndEncryptedData)

const decryptedMessageHex = decryptedMessage.toString()

const hashOfOriginal = hash.update(JSON.stringify(receivedData.originalData))
const hashOfOriginalHex = hash.digest('hex')

if (hashOfOriginalHex === decryptedMessageHex) {
    console.log('Success! The data has not been tampered with and the sender is valid')
} else {
    console.log('Uh oh.. Someone is trying to manipulate the data or someone else is sending this!')
}