79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package web
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import (
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"errors"
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"fmt"
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"net/http"
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"time"
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"github.com/google/uuid"
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"golang.org/x/crypto/bcrypt"
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)
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var sessions map[string]time.Time
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func init() {
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sessions = make(map[string]time.Time)
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}
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func auth(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case "POST":
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password := r.FormValue("password")
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if bcrypt.CompareHashAndPassword([]byte("$2a$04$i4bdOiia2YFN7JXfXLgO4ONCffC67ECyzPEcTLzoP3Lzse/sZT5EC"), []byte(password)) != nil {
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w.WriteHeader(401)
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w.Write([]byte("Wrong Password"))
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return
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}
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token := uuid.New().String()
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sessions[token] = time.Now().Add(time.Hour * 24)
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w.Header().Add("Set-Cookie", fmt.Sprintf("session=%s; Path=/; SameSite=Strict; HttpOnly; Secure", token))
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http.Redirect(w, r, "/device", http.StatusTemporaryRedirect)
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default:
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w.WriteHeader(http.StatusMethodNotAllowed) // Method not Allowed
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}
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}
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func deauth(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case "POST":
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cookie, err := r.Cookie("session")
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if err != nil {
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w.WriteHeader(400)
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return
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}
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token := cookie.Value
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if isAuthenticated(token) == nil {
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delete(sessions, token)
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}
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default:
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w.WriteHeader(405)
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}
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}
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func checkAuthentication(w http.ResponseWriter, r *http.Request) error {
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sCookie, err := r.Cookie("")
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if err == nil && isAuthenticated(sCookie.Value) == nil {
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return nil
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}
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http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
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return errors.New("authentication error")
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}
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func isAuthenticated(token string) error {
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for sToken, expiree := range sessions {
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// Expire old sessions
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if time.Now().After(expiree) {
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delete(sessions, sToken)
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continue
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}
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// Check for valid session of token
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if token == sToken {
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return nil
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}
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}
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return errors.New("this token is not associated with a valid session")
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}
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