context.go
func (ctx *Context) GetSuperSecureCookie(secret, name string) (string, bool) {
	val := ctx.GetCookie(name)
	if val == "" {
		return "", false
	}

	text, err := hex.DecodeString(val)
	if err != nil {
		return "", false
	}

	key := pbkdf2.Key([]byte(secret), []byte(secret), 1000, 16, sha256.New)
	text, err = com.AESGCMDecrypt(key, text)
	return string(text), err == nil
}
func (ctx *Context) GetSuperSecureCookie(secret, name string) (string, bool) {
	val := ctx.GetCookie(name)
	if val == "" {
		return "", false
	}

	text, err := hex.DecodeString(val)
	if err != nil {
		return "", false
	}

	key := pbkdf2.Key([]byte(secret), []byte(secret), 1000, 16, sha256.New)
	text, err = com.AESGCMDecrypt(key, text)
	return string(text), err == nil
}
// GetSuperSecureCookie returns given cookie value from request header with secret string.