我的应用程序的AID是F239856324897348
,我已经为其构造了一个SelectAID APDU。现在,我如何实际将其发送到使用主机卡仿真的接收Android设备。
我已经创建了我的HCE服务以使用以下线程中的响应APDU进行响应:How to define an APDU for STORE DATA for Host Card Emulation?
public static byte[] SelectAID = new byte[]{
(byte) 0xF2, (byte) 0x39, (byte) 0x85, (byte) 0x63,
(byte) 0x24, (byte) 0x89, (byte) 0x73, (byte) 0x48};
private void commandAPDU(byte[] apdu){
//where do I go from here...
}
commandAPDU(SelectAID);
最佳答案
APDU的格式在ISO / IEC 7816-4中定义。一个典型的SELECT(通过AID)命令如下所示:
+-----+-----+-----+-----+-----+-------------------------+-----+ | CLA | INS | P1 | P2 | Lc | DATA | Le | +-----+-----+-----+-----+-----+-------------------------+-----+ | 00 | A4 | 04 | 00 | XX | AID | 00 | +-----+-----+-----+-----+-----+-------------------------+-----+
You could create it like this:
private byte[] selectApdu(byte[] aid) {
byte[] commandApdu = new byte[6 + aid.length];
commandApdu[0] = (byte)0x00; // CLA
commandApdu[1] = (byte)0xA4; // INS
commandApdu[2] = (byte)0x04; // P1
commandApdu[3] = (byte)0x00; // P2
commandApdu[4] = (byte)(aid.length & 0x0FF); // Lc
System.arraycopy(aid, 0, commandApdu, 5, aid.length);
commandApdu[commandApdu.length - 1] = (byte)0x00; // Le
return commandApdu;
}
然后,您可以将这样的APDU命令发送到通过阅读器模式API发现的标签/ HCE设备:
public abstract void onTagDiscovered(Tag tag) {
IsoDep isoDep = IsoDep.get(tag);
if (isoDep != null) {
try {
isoDep.connect();
byte[] result = isoDep.transceive(selectApdu(SelectAID));
} except (IOException ex) {
} finally {
try {
isoDep.close();
} except (Exception ignored) {}
}
}
}