Add jwt crypto module, support unit test for config module

Signed-off-by:  Asai Neko<sugar@sne.moe>

internal/crypto/jwt/jwt.go

@@ -0,0 +1,77 @@
+package jwt
+
+import (
+	"net/http"
+	"nixcn-cms/config"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/google/uuid"
+)
+
+type Claims struct {
+	UserID uuid.UUID `json:"user_id"`
+	jwt.RegisteredClaims
+}
+
+func JWTAuth() gin.HandlerFunc {
+	var JwtSecret = []byte(config.Get("server.jwt_secret").(string))
+	return func(c *gin.Context) {
+		auth := c.GetHeader("Authorization")
+		if auth == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"error": "missing Authorization header",
+			})
+			return
+		}
+
+		parts := strings.SplitN(auth, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"error": "invalid Authorization header format",
+			})
+			return
+		}
+
+		tokenStr := parts[1]
+
+		token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+			return JwtSecret, nil
+		})
+
+		if err != nil || !token.Valid {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"error": "invalid or expired token",
+			})
+			return
+		}
+
+		claims, ok := token.Claims.(*Claims)
+		if !ok {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"error": "invalid token claims",
+			})
+			return
+		}
+
+		c.Set("user_id", claims.UserID)
+		c.Next()
+	}
+}
+
+func GenerateToken(userID uuid.UUID, application string) (string, error) {
+	var JwtSecret = []byte(config.Get("server.jwt_secret").(string))
+	claims := Claims{
+		UserID: userID,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    application,
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString(JwtSecret)
+}