Encabezados de seguridad
Es importante utilizar cabeceras de seguridad para proteger su aplicación web de vulnerabilidades de seguridad comunes. Este ejemplo le muestra cómo añadir cabeceras de seguridad a su aplicación Gin y también cómo evitar ataques relacionados con Host Header Injection (SSRF, Open Redirection).
package main
import (
"net/http"
"github.com/gin-gonic/gin"
)
func main() {
r := gin.Default()
expectedHost := "localhost:8080"
// Setup Security Headers
r.Use(func(c *gin.Context) {
if c.Request.Host != expectedHost {
c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": "Invalid host header"})
return
}
c.Header("X-Frame-Options", "DENY")
c.Header("Content-Security-Policy", "default-src 'self'; connect-src *; font-src *; script-src-elem * 'unsafe-inline'; img-src * data:; style-src * 'unsafe-inline';")
c.Header("X-XSS-Protection", "1; mode=block")
c.Header("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload")
c.Header("Referrer-Policy", "strict-origin")
c.Header("X-Content-Type-Options", "nosniff")
c.Header("Permissions-Policy", "geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()")
c.Next()
})
r.GET("/ping", func(c *gin.Context) {
c.JSON(200, gin.H{
"message": "pong",
})
})
r.Run() // listen and serve on 0.0.0.0:8080
}
Puede probarlo mediante curl:
// ヘッダーのチェック
curl localhost:8080/ping -I
HTTP/1.1 404 Not Found
Content-Security-Policy: default-src 'self'; connect-src *; font-src *; script-src-elem * 'unsafe-inline'; img-src * data:; style-src * 'unsafe-inline';
Content-Type: text/plain
Permissions-Policy: geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()
Referrer-Policy: strict-origin
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-Xss-Protection: 1; mode=block
Date: Sat, 30 Mar 2024 08:20:44 GMT
Content-Length: 18
// ホスト・ヘッダー・インジェクションのチェック
curl localhost:8080/ping -I -H "Host:neti.ee"
HTTP/1.1 400 Bad Request
Content-Type: application/json; charset=utf-8
Date: Sat, 30 Mar 2024 08:21:09 GMT
Content-Length: 31