C# .Net + ACR112U Reader, can’t send transmit

[Alice]

Hi Guys,

I'm working with smart card and ACR112U Reader, using winscard.dll library to send APDU in C# code.
Here is an interface to send transmit

[DllImport("winscard.dll")]
public static extern int SCardTransmit(IntPtr hCard,
ref SCARD_IO_REQUEST pioSendRequest,
ref byte SendBuff,
int SendBuffLen,
ref SCARD_IO_REQUEST pioRecvRequest,
ref byte RecvBuff,
ref int RecvBuffLen);

---

+ 0  |  - 0

[Alice]

I can connect to the reader and card.
But when I try to send transmit for Load Authentication key, I always get RecvBuff empty and RecvLen is zero, nerver get "90 00". But the retCode is zero (that mean there is no problem to send APDU, right?).

---

+ 0  |  - 0

[Author]

Posts