80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
// Copyright (c) 2025 Nikolai Papin
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//
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// This file is part of Easywish
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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// the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package middleware
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import (
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"easywish/config"
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"easywish/internal/utils/enums"
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"errors"
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"fmt"
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"net/http"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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)
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type Claims struct {
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Username string `json:"username"`
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Role enums.Role `json:"role"`
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jwt.RegisteredClaims
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}
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func AuthMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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cfg := config.GetConfig()
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authHeader := c.GetHeader("Authorization")
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if authHeader == "" {
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c.Set("username", nil)
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c.Set("role", enums.GuestRole)
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c.Next()
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return
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}
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tokenString := authHeader
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token, err := jwt.ParseWithClaims(
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tokenString,
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&Claims{},
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func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(cfg.JwtSecret), nil
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},
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)
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if err != nil {
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if errors.Is(err, jwt.ErrTokenExpired) {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "Token expired"})
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} else {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
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}
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return
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}
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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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c.Set("username", claims.Username)
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c.Set("role", claims.Role)
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c.Next()
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} else {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "Invalid claims"})
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}
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}
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}
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