Basic Authentication for http.FileServer

auth_file_server.go

package main

import (
    "fmt"
    "net/http"
    auth "github.com/abbot/go-http-auth"
)

func Secret(user, realm string) string {
    if user == "john" {
		// password is "hello"
		return "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1"
	}
	return ""
}

func main() {
    fmt.Println("-----> Starting HTTP server...")
    
    authenticator := auth.NewBasicAuthenticator("secret.com", Secret)
    http.HandleFunc("/", authenticator.Wrap(func(res http.ResponseWriter, req *auth.AuthenticatedRequest) {
        http.FileServer(http.Dir(".")).ServeHTTP(res, &req.Request)
    }))

    http.ListenAndServe(":5042", nil)
}

How can I generate my own hash and perform comparison between original and requested pass phrase ?

What is the encryption algorithm?