services

services 4/tiktak/server/auth/auth.go

@@ -0,0 +1,28 @@
+package auth
+
+import (
+	"crypto/sha256"
+	"fmt"
+)
+
+var Salt = ""
+
+func SetSalt(s string) {
+	Salt = s
+}
+
+func Validate(id string, hash string) bool {
+	return Generate(id) == hash
+}
+
+func Generate(id string) string {
+	return hashSha(Salt, id)
+}
+
+func hashSha(strings ...string) string {
+	h := sha256.New()
+	for _, s := range strings {
+		h.Write([]byte(s))
+	}
+	return fmt.Sprintf("%x", h.Sum(nil))
+}

services 4/tiktak/server/auth/context.go

@@ -0,0 +1,36 @@
+package auth
+
+import (
+	"github.com/labstack/echo"
+	"net/http"
+	"strconv"
+)
+
+const HashCookieName = "hash"
+const IdCookieName = "user_id"
+
+func Cookies(id int64) (*http.Cookie, *http.Cookie) {
+	ids := strconv.FormatInt(id, 10)
+	return &http.Cookie{Value: ids, Name: IdCookieName}, &http.Cookie{Value: Generate(ids), Name: HashCookieName}
+}
+
+type Context struct {
+	echo.Context
+}
+
+func (uc *Context) GetId() (uid int64) {
+	idc, err := uc.Cookie(IdCookieName)
+	if err != nil {
+		return
+	}
+	hashc, err := uc.Cookie(HashCookieName)
+	if err != nil {
+		return
+	}
+
+	v, err := strconv.ParseInt(idc.Value, 10, 64)
+	if Validate(idc.Value, hashc.Value) && err == nil {
+		uid = v
+	}
+	return
+}

services 4/tiktak/server/auth/middleware.go

@@ -0,0 +1,16 @@
+package auth
+
+import (
+	"github.com/labstack/echo"
+	"net/http"
+)
+
+func RequiredMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		ac := c.(*Context)
+		if ac == nil || ac.GetId() == 0 {
+			return c.Redirect(http.StatusFound, "/login")
+		}
+		return next(c)
+	}
+}