License 校验示例

服务端签名密钥不下发前端。客户端只拿到授权码和公开校验逻辑示例。

func VerifyLicense(licenseKey string, secret string) bool {
    parts := strings.Split(licenseKey, ".")
    if len(parts) != 2 {
        return false
    }
    payload, signature := parts[0], parts[1]
    mac := hmac.New(sha256.New, []byte(secret))
    mac.Write([]byte(payload))
    expected := hex.EncodeToString(mac.Sum(nil))
    return hmac.Equal([]byte(expected), []byte(signature))
}