Android NFC:当APDU命令发送到智能卡时,标签丢失 [英] Android NFC : Tag lost when APDU command sent to a smart card

查看:222
本文介绍了Android NFC:当APDU命令发送到智能卡时,标签丢失的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在Android OS(三星Galaxy)上做一个EMV应用程序.

I am doing an EMV application on Android OS (Samsung Galaxy).

我能够毫无问题地发送多个APDU命令,但是当我尝试发送内部身份验证命令时.我有此错误:标记丢失.您对此错误的目的有任何想法吗?我不是在Android上经过实验的开发人员,可能我忘记了一些东西.

I am able to send several APDU commands without problem but when I am trying to send the internal authentication command. I have this error : Tag lost. Have you got any idea concerning the purpose of this error ? I am not an experimented developer on Android, It may I have forgotten some stuff.

  • 命令正确.
  • 我可以用另一个命令代替,它可以工作(我的意思是我可以恢复响应).

在哪种情况下,可以在Android上中断NFC通信?

In which cases a NFC communication can be broken on Android?

在这里,发送命令时您会看到我的问题:

Here, you can see my problem when the command is sent :

D/ECInfoGrabber(14088):发送:00 88 00 00 04 14 16 67 3D
D/OpenGLRenderer(14088):刷新缓存(模式0)D/dalvikvm(14088):GC_FOR_ALLOC释放227K,4%释放14298K/14855K,暂停29ms I/dalvikvm-heap(14088):将堆(片段大小写)增加到14.142MB 115216字节分配D/dalvikvm(14088):GC_FOR_ALLOC释放了3K,4% 免费14408K/14983K,暂停15ms

D/ECInfoGrabber(14088): Send: 00 88 00 00 04 14 16 67 3D
D/OpenGLRenderer(14088): Flushing caches (mode 0) D/dalvikvm(14088): GC_FOR_ALLOC freed 227K, 4% free 14298K/14855K, paused 29ms I/dalvikvm-heap(14088): Grow heap (frag case) to 14.142MB for 115216-byte allocation D/dalvikvm(14088): GC_FOR_ALLOC freed 3K, 4% free 14408K/14983K, paused 15ms

谢谢

推荐答案

一种可能性是,卡的响应所花费的时间比默认超时设置要长.当卡必须进行一些内部计算时,通常会发生这种情况.通常在进行身份验证之类的加密操作的情况下.

One possibility is that the response from the card takes more time than the default time-out setting. This often occurs when the card has to do some internal calculations; typically in case of cryptographic operations such as authentication.

您可以使用 IsoDep.setTimeout() :

You can change the time-out value using IsoDep.setTimeout():

 IsoDep iso = IsoDep.get(tag);
 iso.connect();
 iso.setTimeOut(5000); // 5 sec time out
 iso.transceive(apduCommand); // now send your command 

这篇关于Android NFC:当APDU命令发送到智能卡时,标签丢失的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆