使用PN532板。为了简化与基于Arduino的主机的工作,请使用
this library。
定义连接。
#include <Arduino.h>
#include <SPI.h>
#include <PN532_SPI.h>
#include <PN532.h>
PN532_SPI intfc(SPI,5);
PN532 nfc(intfc);
检查卡/手机是否存在:
success = nfc.inListPassiveTarget()
if (success) { ...
定义通信缓冲区:
uint8_t apdubuffer[255] = {};
uint8_t apdulen;
并发送SELECT PPSE命令:
apdulen = 255;
success2 = sendAPDU(0x00, 0xA4, 0x04, 0x00, "2PAY.SYS.DDF01", 0x00, &apdubuffer[0], &apdulen);
如果成功,则:
//fromHEX("A0000000031010") - VISA
//fromHEX("A0000000041010") - MC
success2 = sendAPDU(0x00, 0xA4, 0x04, 0x00, fromHEX("A0000000031010"), 0x00, &apdubuffer[0], &apdulen);
而且您可以读取卡片的内部文件(SFI / RECs),例如:
success2 = sendAPDU(0x00, 0xB2, rec_num, (sfi_num << 3)+4, 0x00, &apdubuffer[0], &apdulen);
最好找到PAN / ICC公钥,因为它是卡的唯一标识,但在PAN / ICC之前会有许多字节呈现,我认为这些字节相当独特且足以执行身份验证。
毕竟,您需要这些重载:
bool sendAPDU(byte cla, byte ins, byte p1, byte p2, String aid, byte le, uint8_t *response, uint8_t *resp_len)
{
uint8_t cmdbuf[255];
memset(&cmdbuf[0],0,255);
cmdbuf[0] = cla;
cmdbuf[1] = ins;
cmdbuf[2] = p1;
cmdbuf[3] = p2;
cmdbuf[4] = aid.length();
int i;
for (i=0;i<aid.length();i++)
cmdbuf[5+i] = aid[i];
cmdbuf[6+i] = le;
return nfc.inDataExchange(&cmdbuf[0], 5+aid.length(), response, resp_len);
}
bool sendAPDU(byte cla, byte ins, byte p1, byte p2, uint8_t* aid, byte le, uint8_t *response, uint8_t *resp_len)
{
uint8_t cmdbuf[255];
memset(&cmdbuf[0],0,255);
cmdbuf[0] = cla;
cmdbuf[1] = ins;
cmdbuf[2] = p1;
cmdbuf[3] = p2;
cmdbuf[4] = aid[0];
int i;
for (i=0;i<aid[0];i++)
cmdbuf[5+i] = aid[i+1];
cmdbuf[6+i] = le;
return nfc.inDataExchange(&cmdbuf[0], 5+cmdbuf[4], response, resp_len);
}
bool sendAPDU(byte cla, byte ins, byte p1, byte p2, byte le, uint8_t *response, uint8_t *resp_len)
{
uint8_t cmdbuf[255];
memset(&cmdbuf[0],0,255);
cmdbuf[0] = cla;
cmdbuf[1] = ins;
cmdbuf[2] = p1;
cmdbuf[3] = p2;
cmdbuf[4] = le;
return nfc.inDataExchange(&cmdbuf[0], 5, response, resp_len);
}
还有这个:
uint8_t fromHexBuf[255];
uint8_t* fromHEX(String hexs) {
int i = hexs.length()/2;
fromHexBuf[0] = i;
int x=0;
while (i) {
char buf[3];
char *tmp;
buf[0] = hexs[2*x];
buf[1] = hexs[2*x+1];
buf[2] = 0;
uint8_t v = strtol(&buf[0], &tmp, 16);
fromHexBuf[x+1] = v;
x=x+1;
i--;
}
return &fromHexBuf[0];
}