82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
package middlewares
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import (
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"GoMembership/internal/config"
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"GoMembership/pkg/logger"
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"net/http"
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"strings"
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"time"
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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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var (
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jwtKey = []byte(config.Auth.JWTSecret)
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jwtSigningMethod = jwt.SigningMethodHS256
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jwtParser = jwt.NewParser(jwt.WithValidMethods([]string{jwtSigningMethod.Alg()}))
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)
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func GenerateToken(userID int64) (string, error) {
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token := jwt.NewWithClaims(jwtSigningMethod, jwt.MapClaims{
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"user_id": userID,
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"exp": time.Now().Add(time.Minute * 15).Unix(), // Token expires in 15 Minutes
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})
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return token.SignedString(jwtKey)
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}
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func verifyToken(tokenString string) (*jwt.Token, error) {
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token, err := jwtParser.Parse(tokenString, func(_ *jwt.Token) (interface{}, error) {
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return jwtKey, nil
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})
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if err != nil {
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return nil, err
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}
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return token, nil
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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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authHeader := c.GetHeader("Authorization")
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if authHeader == "" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header is required"})
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c.Abort()
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return
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}
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bearerToken := strings.Split(authHeader, " ")
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if len(bearerToken) != 2 {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token format"})
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c.Abort()
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return
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}
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tokenString := bearerToken[1]
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token, err := verifyToken(tokenString)
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if err != nil {
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if err == jwt.ErrTokenSignatureInvalid {
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logger.Error.Printf("JWT NULL ATTACK: %#v", err)
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token signing method"})
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} else {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
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}
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c.Abort()
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return
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}
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if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
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userID := claims["user_id"].(string)
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c.Set("user_id", userID)
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c.Next()
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} else {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token claims"})
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c.Abort()
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return
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}
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}
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}
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