133 lines
3.2 KiB
Go
133 lines
3.2 KiB
Go
// +build ignore
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package main
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import (
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"crypto/x509"
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"fmt"
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"log"
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"git.sr.ht/~adnano/gmi"
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)
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type user struct {
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password string // TODO: use hashes
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admin bool
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}
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type session struct {
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username string
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authorized bool // whether or not the password was supplied
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}
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var (
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// Map of usernames to user data
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logins = map[string]user{
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"admin": {"p@ssw0rd", true}, // NOTE: These are bad passwords!
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"user1": {"password1", false},
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"user2": {"password2", false},
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}
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// Map of certificate fingerprints to sessions
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sessions = map[string]*session{}
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)
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func main() {
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handler := &gmi.ServeMux{}
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handler.HandleFunc("/", welcome)
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handler.HandleFunc("/login", login)
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handler.HandleFunc("/login/password", loginPassword)
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handler.HandleFunc("/profile", profile)
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handler.HandleFunc("/admin", admin)
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handler.HandleFunc("/logout", logout)
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server := &gmi.Server{}
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if err := server.CertificateStore.Load("/var/lib/gemini/certs"); err != nil {
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log.Fatal(err)
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}
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server.Handle("localhost", handler)
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if err := server.ListenAndServe(); err != nil {
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log.Fatal(err)
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}
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}
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func getSession(crt *x509.Certificate) (*session, bool) {
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fingerprint := gmi.Fingerprint(crt)
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session, ok := sessions[fingerprint]
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return session, ok
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}
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func welcome(rw *gmi.ResponseWriter, req *gmi.Request) {
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rw.Write([]byte("Welcome to this example.\n=> /login Login\n"))
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}
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func login(rw *gmi.ResponseWriter, req *gmi.Request) {
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gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
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gmi.WithInput(rw, req, "Username", func(username string) {
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fingerprint := gmi.Fingerprint(cert)
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sessions[fingerprint] = &session{
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username: username,
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}
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gmi.Redirect(rw, req, "/login/password")
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})
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})
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}
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func loginPassword(rw *gmi.ResponseWriter, req *gmi.Request) {
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gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
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session, ok := getSession(cert)
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if !ok {
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gmi.CertificateNotAuthorized(rw, req)
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return
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}
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gmi.WithSensitiveInput(rw, req, "Password", func(password string) {
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expected := logins[session.username].password
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if password == expected {
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session.authorized = true
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gmi.Redirect(rw, req, "/profile")
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} else {
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gmi.SensitiveInput(rw, req, "Wrong password. Try again")
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}
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})
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})
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}
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func logout(rw *gmi.ResponseWriter, req *gmi.Request) {
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gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
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fingerprint := gmi.Fingerprint(cert)
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delete(sessions, fingerprint)
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})
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rw.Write([]byte("Successfully logged out.\n"))
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}
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func profile(rw *gmi.ResponseWriter, req *gmi.Request) {
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gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
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session, ok := getSession(cert)
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if !ok {
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gmi.CertificateNotAuthorized(rw, req)
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return
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}
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user := logins[session.username]
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profile := fmt.Sprintf("Username: %s\nAdmin: %t\n=> /logout Logout", session.username, user.admin)
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rw.Write([]byte(profile))
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})
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}
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func admin(rw *gmi.ResponseWriter, req *gmi.Request) {
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gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
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session, ok := getSession(cert)
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if !ok {
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gmi.CertificateNotAuthorized(rw, req)
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return
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}
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user := logins[session.username]
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if !user.admin {
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gmi.CertificateNotAuthorized(rw, req)
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return
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}
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rw.Write([]byte("Welcome to the admin portal.\n"))
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})
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}
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