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|
// +build ignore
package main
import (
"crypto/x509"
"fmt"
"log"
"git.sr.ht/~adnano/go-gemini"
)
type user struct {
password string // TODO: use hashes
admin bool
}
type session struct {
username string
authorized bool // whether or not the password was supplied
}
var (
// Map of usernames to user data
logins = map[string]user{
"admin": {"p@ssw0rd", true}, // NOTE: These are bad passwords!
"user1": {"password1", false},
"user2": {"password2", false},
}
// Map of certificate fingerprints to sessions
sessions = map[string]*session{}
)
func main() {
var mux gemini.ServeMux
mux.HandleFunc("/", login)
mux.HandleFunc("/password", loginPassword)
mux.HandleFunc("/profile", profile)
mux.HandleFunc("/admin", admin)
mux.HandleFunc("/logout", logout)
var server gemini.Server
if err := server.CertificateStore.Load("/var/lib/gemini/certs"); err != nil {
log.Fatal(err)
}
server.Register("localhost", &mux)
if err := server.ListenAndServe(); err != nil {
log.Fatal(err)
}
}
func getSession(crt *x509.Certificate) (*session, bool) {
fingerprint := gemini.Fingerprint(crt)
session, ok := sessions[fingerprint]
return session, ok
}
func login(w *gemini.ResponseWriter, r *gemini.Request) {
cert, ok := gemini.Certificate(w, r)
if !ok {
return
}
username, ok := gemini.Input(w, r, "Username")
if !ok {
return
}
fingerprint := gemini.Fingerprint(cert)
sessions[fingerprint] = &session{
username: username,
}
gemini.Redirect(w, "/password")
}
func loginPassword(w *gemini.ResponseWriter, r *gemini.Request) {
cert, ok := gemini.Certificate(w, r)
if !ok {
return
}
session, ok := getSession(cert)
if !ok {
w.WriteStatus(gemini.StatusCertificateNotAuthorized)
return
}
password, ok := gemini.SensitiveInput(w, r, "Password")
if !ok {
return
}
expected := logins[session.username].password
if password == expected {
session.authorized = true
gemini.Redirect(w, "/profile")
} else {
gemini.SensitiveInput(w, r, "Wrong password. Try again")
}
}
func logout(w *gemini.ResponseWriter, r *gemini.Request) {
cert, ok := gemini.Certificate(w, r)
if !ok {
return
}
fingerprint := gemini.Fingerprint(cert)
delete(sessions, fingerprint)
fmt.Fprintln(w, "Successfully logged out.")
}
func profile(w *gemini.ResponseWriter, r *gemini.Request) {
cert, ok := gemini.Certificate(w, r)
if !ok {
return
}
session, ok := getSession(cert)
if !ok {
w.WriteStatus(gemini.StatusCertificateNotAuthorized)
return
}
user := logins[session.username]
fmt.Fprintln(w, "Username:", session.username)
fmt.Fprintln(w, "Admin:", user.admin)
fmt.Fprintln(w, "=> /logout Logout")
}
func admin(w *gemini.ResponseWriter, r *gemini.Request) {
cert, ok := gemini.Certificate(w, r)
if !ok {
return
}
session, ok := getSession(cert)
if !ok {
w.WriteStatus(gemini.StatusCertificateNotAuthorized)
return
}
user := logins[session.username]
if !user.admin {
w.WriteStatus(gemini.StatusCertificateNotAuthorized)
return
}
fmt.Fprintln(w, "Welcome to the admin portal.")
}
|