예제 #1
0
func MakeCookie(context echo.Context, name string, value string) {
	cookie := new(echo.Cookie)
	cookie.SetName(name)
	cookie.SetValue(value)
	cookie.SetExpires(time.Now().Add(24 * 365 * time.Hour)) // Make the cookie good for a year
	context.SetCookie(cookie)
}
예제 #2
0
// CSRFWithConfig returns a CSRF middleware from config.
// See `CSRF()`.
func CSRFWithConfig(config CSRFConfig) echo.MiddlewareFunc {
	// Defaults
	if config.Secret == nil {
		panic("csrf secret must be provided")
	}
	if config.TokenLookup == "" {
		config.TokenLookup = DefaultCSRFConfig.TokenLookup
	}
	if config.ContextKey == "" {
		config.ContextKey = DefaultCSRFConfig.ContextKey
	}
	if config.CookieName == "" {
		config.CookieName = DefaultCSRFConfig.CookieName
	}
	if config.CookieExpires.IsZero() {
		config.CookieExpires = DefaultCSRFConfig.CookieExpires
	}

	// Initialize
	parts := strings.Split(config.TokenLookup, ":")
	extractor := csrfTokenFromHeader(parts[1])
	switch parts[0] {
	case "form":
		extractor = csrfTokenFromForm(parts[1])
	case "query":
		extractor = csrfTokenFromQuery(parts[1])
	}

	return func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) error {
			req := c.Request()

			// Set CSRF token
			salt, err := generateSalt(8)
			if err != nil {
				return err
			}
			token := generateCSRFToken(config.Secret, salt)
			c.Set(config.ContextKey, token)
			cookie := new(echo.Cookie)
			cookie.SetName(config.CookieName)
			cookie.SetValue(token)
			if config.CookiePath != "" {
				cookie.SetPath(config.CookiePath)
			}
			if config.CookieDomain != "" {
				cookie.SetDomain(config.CookieDomain)
			}
			cookie.SetExpires(config.CookieExpires)
			cookie.SetSecure(config.CookieSecure)
			cookie.SetHTTPOnly(config.CookieHTTPOnly)
			c.SetCookie(cookie)

			switch req.Method() {
			case echo.GET, echo.HEAD, echo.OPTIONS, echo.TRACE:
			default:
				token, err := extractor(c)
				if err != nil {
					return err
				}
				ok, err := validateCSRFToken(token, config.Secret)
				if err != nil {
					return err
				}
				if !ok {
					return echo.NewHTTPError(http.StatusForbidden, "invalid csrf token")
				}
			}
			return next(c)
		}
	}
}
예제 #3
0
파일: csrf.go 프로젝트: mtojek/echo
// CSRFWithConfig returns a CSRF middleware from config.
// See `CSRF()`.
func CSRFWithConfig(config CSRFConfig) echo.MiddlewareFunc {
	// Defaults
	if config.Skipper == nil {
		config.Skipper = DefaultCSRFConfig.Skipper
	}
	if config.TokenLength == 0 {
		config.TokenLength = DefaultCSRFConfig.TokenLength
	}
	if config.TokenLookup == "" {
		config.TokenLookup = DefaultCSRFConfig.TokenLookup
	}
	if config.ContextKey == "" {
		config.ContextKey = DefaultCSRFConfig.ContextKey
	}
	if config.CookieName == "" {
		config.CookieName = DefaultCSRFConfig.CookieName
	}
	if config.CookieMaxAge == 0 {
		config.CookieMaxAge = DefaultCSRFConfig.CookieMaxAge
	}

	// Initialize
	parts := strings.Split(config.TokenLookup, ":")
	extractor := csrfTokenFromHeader(parts[1])
	switch parts[0] {
	case "form":
		extractor = csrfTokenFromForm(parts[1])
	case "query":
		extractor = csrfTokenFromQuery(parts[1])
	}

	return func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) error {
			if config.Skipper(c) {
				return next(c)
			}

			req := c.Request()
			k, err := c.Cookie(config.CookieName)
			token := ""

			if err != nil {
				// Generate token
				token = random.String(config.TokenLength)
			} else {
				// Reuse token
				token = k.Value()
			}

			switch req.Method() {
			case echo.GET, echo.HEAD, echo.OPTIONS, echo.TRACE:
			default:
				// Validate token only for requests which are not defined as 'safe' by RFC7231
				clientToken, err := extractor(c)
				if err != nil {
					return err
				}
				if !validateCSRFToken(token, clientToken) {
					return echo.NewHTTPError(http.StatusForbidden, "csrf token is invalid")
				}
			}

			// Set CSRF cookie
			cookie := new(echo.Cookie)
			cookie.SetName(config.CookieName)
			cookie.SetValue(token)
			if config.CookiePath != "" {
				cookie.SetPath(config.CookiePath)
			}
			if config.CookieDomain != "" {
				cookie.SetDomain(config.CookieDomain)
			}
			cookie.SetExpires(time.Now().Add(time.Duration(config.CookieMaxAge) * time.Second))
			cookie.SetSecure(config.CookieSecure)
			cookie.SetHTTPOnly(config.CookieHTTPOnly)
			c.SetCookie(cookie)

			// Store token in the context
			c.Set(config.ContextKey, token)

			// Protect clients from caching the response
			c.Response().Header().Add(echo.HeaderVary, echo.HeaderCookie)

			return next(c)
		}
	}
}