using System;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string result = ComputeSha1Hash("B7E84624B45D8D124456E78D2C33026487c3ac0c1337473c2f6a41f4c612c7d4");

        result = BCrypt.Net.BCrypt.HashPassword(result, workFactor: 10);

        Console.WriteLine(result);

    }

    private static string ComputeSha1Hash(string input)

    {

        using (SHA1 sha1 = SHA1.Create())

        {

            byte[] inputBytes = Encoding.UTF8.GetBytes(input);

            byte[] hashBytes = sha1.ComputeHash(inputBytes);

​

            StringBuilder sb = new StringBuilder();

            foreach (var b in hashBytes)

            {

                sb.Append(b.ToString("x2"));

            }

            return sb.ToString();

        }

    }

}