using System;

using System.Linq;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        Encoding ascii = Encoding.ASCII;

​

        // THIS IS THE FULL URL RECEIVED BY THE FUNCTION: 

        // https://robofilefunction2.azurewebsites.net/api/HttpTriggerCSharp1?code=7QlyJ7VNRyUYwV/Btoo1XVcdLsgqhWfEaNTBImn/kDp5Xp8nOu6QXA==&hash=WYoJBphUQc+jdkwv6amXpJWxBmqMX3I22dGbuK8vcus=&secret=1617666146730x499209949986422800&epoch=1618594736&backendURI=https://graph.microsoft.com/v1.0/drives/b!zqQECMNv4UmKUnm4PzVglT2NNyP-10pOoOrAZ1IpYin3fhu94xNLTa4_qYzNVy0R/items/01HIWRJHMZGAJCRGA6QVG2N4E4THZ3PRCB/content

​

               String passphrase = "blahs"; // I also stored this passphrase value in keyvault as a secret called bubbleHashPassphrase

        // For the input for the hash, it's easier in bubble to just string together all the query parameters after the hash like below and use that as the input for the hash on bubble's side. Can you just use this instead of using pipe separators? 

        String input_for_hash = "&secret=1617666146730x499209949986422800&epoch=1618594736&backendURI=https://graph.microsoft.com/v1.0/drives/b!zqQECMNv4UmKUnm4PzVglT2NNyP-10pOoOrAZ1IpYin3fhu94xNLTa4_qYzNVy0R/items/01HIWRJHMZGAJCRGA6QVG2N4E4THZ3PRCB/content";

               String hash_received_in_URL = "WYoJBphUQc+jdkwv6amXpJWxBmqMX3I22dGbuK8vcus="; // extract this from the hash query parameter received by the function

​

               HMACSHA256 hmac = new HMACSHA256(ascii.GetBytes(passphrase));

​

               String calculated_hash = Convert.ToBase64String(hmac.ComputeHash(ascii.GetBytes(input_for_hash)));

​

               if (hash_received_in_URL == calculated_hash) {

​

                    Console.WriteLine("Matches");

​

               } else {

​

                    Console.WriteLine("Does not match");

​

               }

    }

}