Initial commit: 网络验证平台

backend/internal/router/app/app_crypto_helper.go

@@ -0,0 +1,100 @@
+package app
+
+import (
+	"fmt"
+	"verification-platform-backend/internal/database"
+	"verification-platform-backend/internal/model"
+	"verification-platform-backend/pkg/crypto"
+
+	"github.com/gin-gonic/gin"
+)
+
+func AppCryptoMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		fmt.Printf("[AppCrypto] Middleware called\n")
+		appKey := c.Param("appKey")
+		fmt.Printf("[AppCrypto] AppKey from param: %s\n", appKey)
+
+		if appKey == "" {
+			fmt.Printf("[AppCrypto] AppKey is empty, skipping\n")
+			c.Next()
+			return
+		}
+
+		var app model.Application
+		if err := database.DB.Where("app_key = ?", appKey).First(&app).Error; err != nil {
+			fmt.Printf("[AppCrypto] Database error: %v\n", err)
+			c.Next()
+			return
+		}
+
+		fmt.Printf("[AppCrypto] App found: %+v\n", app)
+
+		var encryptType crypto.EncryptType
+		switch app.EncryptType {
+		case "aes":
+			encryptType = crypto.EncryptTypeAES
+		case "rc4":
+			encryptType = crypto.EncryptTypeRC4
+		default:
+			encryptType = crypto.EncryptTypeNone
+		}
+
+		shouldEncrypt := encryptType != crypto.EncryptTypeNone
+
+		fmt.Printf("[AppCrypto] AppKey: %s, EncryptType: %s, SecretKey: %s, ShouldEncrypt: %v\n",
+			appKey, app.EncryptType, app.SecretKey, shouldEncrypt)
+
+		c.Set("should_encrypt_response", shouldEncrypt)
+		c.Set("crypto_manager", crypto.NewCryptoManager(encryptType, app.SecretKey))
+
+		c.Next()
+	}
+}
+
+func getAppCryptoManager(appKey string) (*crypto.CryptoManager, error) {
+	var app model.Application
+	if err := database.DB.Where("app_key = ?", appKey).First(&app).Error; err != nil {
+		return nil, err
+	}
+
+	var encryptType crypto.EncryptType
+	switch app.EncryptType {
+	case "aes":
+		encryptType = crypto.EncryptTypeAES
+	case "rc4":
+		encryptType = crypto.EncryptTypeRC4
+	default:
+		encryptType = crypto.EncryptTypeNone
+	}
+
+	return crypto.NewCryptoManager(encryptType, app.SecretKey), nil
+}
+
+func decryptRequest(c *gin.Context, appKey string) ([]byte, error) {
+	encryptedData := c.GetHeader("X-Encrypted-Data")
+	if encryptedData == "" {
+		return nil, nil
+	}
+
+	cryptoManager, err := getAppCryptoManager(appKey)
+	if err != nil {
+		return nil, err
+	}
+
+	decrypted, err := cryptoManager.Decrypt(encryptedData)
+	if err != nil {
+		return nil, err
+	}
+
+	return []byte(decrypted), nil
+}
+
+func encryptResponse(c *gin.Context, appKey string, data []byte) (string, error) {
+	cryptoManager, err := getAppCryptoManager(appKey)
+	if err != nil {
+		return "", err
+	}
+
+	return cryptoManager.Encrypt(string(data))
+}