Initial commit: docker compose config

server/web/auth/auth.go

@@ -0,0 +1,105 @@
+package auth
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"net/http"
+	"os"
+	"path/filepath"
+	"unsafe"
+
+	"github.com/gin-gonic/gin"
+
+	"server/log"
+	"server/settings"
+)
+
+func SetupAuth(engine *gin.Engine) {
+	if !settings.HttpAuth {
+		return
+	}
+	accs := getAccounts()
+	if accs == nil {
+		return
+	}
+	engine.Use(BasicAuth(accs))
+}
+
+func getAccounts() gin.Accounts {
+	buf, err := os.ReadFile(filepath.Join(settings.Path, "accs.db"))
+	if err != nil {
+		return nil
+	}
+	var accs gin.Accounts
+	err = json.Unmarshal(buf, &accs)
+	if err != nil {
+		log.TLogln("Error parse accs.db", err)
+	}
+	return accs
+}
+
+type authPair struct {
+	value string
+	user  string
+}
+type authPairs []authPair
+
+func (a authPairs) searchCredential(authValue string) (string, bool) {
+	if authValue == "" {
+		return "", false
+	}
+	for _, pair := range a {
+		if pair.value == authValue {
+			return pair.user, true
+		}
+	}
+	return "", false
+}
+
+func BasicAuth(accounts gin.Accounts) gin.HandlerFunc {
+	pairs := processAccounts(accounts)
+	return func(c *gin.Context) {
+		c.Set("auth_required", true)
+
+		user, found := pairs.searchCredential(c.Request.Header.Get("Authorization"))
+		if found {
+			c.Set(gin.AuthUserKey, user)
+		}
+	}
+}
+
+func CheckAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if !settings.HttpAuth {
+			return
+		}
+
+		if _, ok := c.Get(gin.AuthUserKey); ok {
+			return
+		}
+
+		c.Header("WWW-Authenticate", "Basic realm=Authorization Required")
+		c.AbortWithStatus(http.StatusUnauthorized)
+	}
+}
+
+func processAccounts(accounts gin.Accounts) authPairs {
+	pairs := make(authPairs, 0, len(accounts))
+	for user, password := range accounts {
+		value := authorizationHeader(user, password)
+		pairs = append(pairs, authPair{
+			value: value,
+			user:  user,
+		})
+	}
+	return pairs
+}
+
+func authorizationHeader(user, password string) string {
+	base := user + ":" + password
+	return "Basic " + base64.StdEncoding.EncodeToString(StringToBytes(base))
+}
+
+func StringToBytes(s string) (b []byte) {
+	return unsafe.Slice(unsafe.StringData(s), len(s))
+}