我正在尝试阅读爱沙尼亚身份证的个人文件。WinSCard SCARD_E_PROTO_MISMATCH连接到爱沙尼亚身份证时
我需要把下面的数据(从 here)发送到卡,以读取个人文件记录(即身份证号码,姓名等):
00 A4 00 0C # We choose root folder
00 A4 01 0C 02 EE EE # We choose folder EEEE
00 A4 02 04 02 50 44 # We choose file 5044, which contains personal data
00 B2 XX 04 # We read record XX (see table) from the personal data file
# The card responds 61 YY, where YY denotes the number of bytes waiting to be read
00 C0 00 00 YY # We read YY bytes from the card
# Card responds ... 90 00, where ... is the requested data and 90 00 means status OK
然而,原始字节在T = 0协议中,并且卡在接受T = 0之前不合理地长时间卡在T = 1中。事件的顺序如下:
- 卡连接到读卡器
- 程序返回从
SCardStatusChange
并开始处理卡 - 在尝试连接到存储卡(
SCardConnect
或SCardReconnect
)收到SCARD_E_SHARING_VIOLATION
错误一遍又一遍,大约5秒 - 然后,在尝试连接时,错误
SCARD_E_PROTO_MISMATCH
接收到3到30秒之间的任何地方,也许更多。 - 之后,卡成功连接并读取数据。
我可以在T = 0协议中以某种方式更快地连接到它吗?
的我的源代码的简化版本如下:
// NOTE: this is approximately what I do.
// I haven't tested this code yet - it's almost 1 AM here.
#include <winscard.h>
void readSmartCard() {
LONG sCardErrorCode;
SCARDCONTEXT sCardContext;
DWORD sCardReaderStrLen = 1024;
wchar_t sCardReaderStr[1024];
SCARDHANDLE sCardHandle;
DWORD sCardActiveProtocol;
SCARD_READERSTATE readerState;
sCardErrorCode = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &sCardContext);
// error handling macro
ZeroMemory(&sCardReaderState, sizeof(sCardReaderState));
sCardReaderState.szReader = L"\\\\?PnP?\\Notification";
sCardReaderState.pvUserData = nullptr;
sCardReaderState.dwEventState = SCARD_STATE_PRESENT;
sCardErrorCode = SCardGetStatusChange(sCardContext, INFINITE, &readerState, 1);
// e.h.m
if (readerState.dwCurrentState == 65538) {
sCardErrorCode = SCardListReaders(sCardContext, NULL, sCardReaderStr, &sCardReaderStrLen);
// e.h.m
readerState.szReader = sCardReaderStr;
}
sCardErrorCode = SCardGetStatusChange(sCardContext, INFINITE, &readerState, 1);
// e.h.m
if (sCardReaderState.dwEventState & SCARD_STATE_PRESENT) {
while (true) {
sCardErrorCode = SCardConnect(sCardContext, readerState.szReader, SCARD_SHARE_EXCLUSIVE,
SCARD_PROTOCOL_T0, &sCardHandle, &sCardActiveProtocol);
// e.h.m
printf("%x", sCardErrorCode);
// this will print:
// 8010000b (for around 5s)
// 8010000f (for around 20s)
if (sCardErrorCode == SCARD_S_SUCCESS) {
break;
}
Sleep(1000);
}
// open personal file and read data, yay!
}
}
1)做一个连接所使用的协议不应该使在性能上noticable差。 2)支持T = 0以及T = 1的卡足够不寻常3)如果有疑问,总是使用T = 1,它在应用程序中更容易并且在安全消息传递方面更加健壮。 – guidot