diff -up ccid-1.4.26/src/ccid.c.omnikey ccid-1.4.26/src/ccid.c

--- ccid-1.4.26/src/ccid.c.omnikey	2017-02-24 10:04:25.742132234 +0100

+++ ccid-1.4.26/src/ccid.c	2017-02-24 10:07:26.145976335 +0100

@@ -55,8 +55,16 @@ int ccid_open_hack_pre(unsigned int read

 {

 	_ccid_descriptor *ccid_descriptor = get_ccid_descriptor(reader_index);

+	ccid_descriptor->dwNonStandardFlags = 0;

+

 	switch (ccid_descriptor->readerID)

 	{

+		case CARDMAN3121:

+			ccid_descriptor->dwNonStandardFlags = CCID_NON_STAND_OMK_3121_T1;

+			ccid_descriptor->dwFeatures &= ~CCID_CLASS_EXCHANGE_MASK;

+			ccid_descriptor->dwFeatures |= CCID_CLASS_TPDU;

+			break;

+

 		case MYSMARTPAD:

 			ccid_descriptor->dwMaxIFSD = 254;

 			break;

diff -up ccid-1.4.26/src/ccid.h.omnikey ccid-1.4.26/src/ccid.h

--- ccid-1.4.26/src/ccid.h.omnikey	2017-01-07 15:50:47.000000000 +0100

+++ ccid-1.4.26/src/ccid.h	2017-02-24 10:04:25.742132234 +0100

@@ -137,6 +137,7 @@ typedef struct

 	 */

 	char zlp;

 #endif

+	unsigned int dwNonStandardFlags;

 } _ccid_descriptor;

 /* Features from dwFeatures */

@@ -153,6 +154,9 @@ typedef struct

 #define CCID_CLASS_EXTENDED_APDU	0x00040000

 #define CCID_CLASS_EXCHANGE_MASK	0x00070000

+/* Features from the swNonStandardFlags */

+#define CCID_NON_STAND_OMK_3121_T1	0x00000001

+

 /* Features from bPINSupport */

 #define CCID_CLASS_PIN_VERIFY		0x01

 #define CCID_CLASS_PIN_MODIFY		0x02

diff -up ccid-1.4.26/src/commands.c.omnikey ccid-1.4.26/src/commands.c

--- ccid-1.4.26/src/commands.c.omnikey	2017-01-07 15:50:47.000000000 +0100

+++ ccid-1.4.26/src/commands.c	2017-02-24 10:11:21.297778870 +0100

@@ -1292,6 +1292,39 @@ RESPONSECODE CmdXfrBlock(unsigned int re

 	return return_value;

 } /* CmdXfrBlock */

+static RESPONSECODE omnikey_transmit_tpdu(unsigned int reader_index,

+        _ccid_descriptor *ccid_descriptor, unsigned int tx_length,

+        const unsigned char *tx_buffer)

+{

+	unsigned char cmd[11+CMD_BUF_SIZE];	 /* CCID + APDU buffer */

+	status_t ret;

+

+	cmd[0] = 0x6B; 				/* 3121 escape */

+	i2dw(tx_length+1, cmd+1); 	/* APDU length */

+	cmd[5] = ccid_descriptor->bCurrentSlotIndex;	/* slot number */

+	cmd[6] = (*ccid_descriptor->pbSeq)++;

+	cmd[7] = 0;

+	cmd[8] = 0;

+	cmd[9] = 0;

+	cmd[10] = 0x1A;

+

+	/* check that the command is not too large */

+	if (tx_length > CMD_BUF_SIZE)

+	{

+		DEBUG_CRITICAL2("TX Length too big: %d", tx_length);

+		return IFD_NOT_SUPPORTED;

+	}

+

+	memcpy(cmd+11, tx_buffer, tx_length);

+

+	ret = WritePort(reader_index, 11+tx_length, cmd);

+	if (STATUS_NO_SUCH_DEVICE == ret)

+		return IFD_NO_SUCH_DEVICE;

+	if (ret != STATUS_SUCCESS)

+		return IFD_COMMUNICATION_ERROR;

+

+	return IFD_SUCCESS;

+} /* omnikey_transmit_tpdu */

 /*****************************************************************************

  *

@@ -1348,6 +1381,13 @@ RESPONSECODE CCID_Transmit(unsigned int

 	}

 #endif

+	/* hack for Onmikey 3121 */

+	if ((ccid_descriptor->dwNonStandardFlags & CCID_NON_STAND_OMK_3121_T1) &&

+		(ccid_descriptor->cardProtocol == SCARD_PROTOCOL_T1)) {

+		return omnikey_transmit_tpdu(reader_index, ccid_descriptor, tx_length, 

+				tx_buffer);

+	}

+

 	cmd[0] = 0x6F; /* XfrBlock */

 	i2dw(tx_length, cmd+1);	/* APDU length */

 	cmd[5] = ccid_descriptor->bCurrentSlotIndex;	/* slot number */

@@ -1373,8 +1413,9 @@ RESPONSECODE CCID_Transmit(unsigned int

 RESPONSECODE CCID_Receive(unsigned int reader_index, unsigned int *rx_length,

 	unsigned char rx_buffer[], unsigned char *chain_parameter)

 {

-	unsigned char cmd[10+CMD_BUF_SIZE];	/* CCID + APDU buffer */

+	unsigned char cmd[11+CMD_BUF_SIZE];	/* CCID + APDU buffer */

 	unsigned int length;

+	unsigned char *rx_ptr = cmd+10;

 	RESPONSECODE return_value = IFD_SUCCESS;

 	status_t ret;

 	_ccid_descriptor *ccid_descriptor = get_ccid_descriptor(reader_index);

@@ -1565,6 +1606,14 @@ time_request:

 	}

 	length = dw2i(cmd, 1);

+

+	if (length && 

+	  (ccid_descriptor->dwNonStandardFlags & CCID_NON_STAND_OMK_3121_T1) &&

+	  (ccid_descriptor->cardProtocol == SCARD_PROTOCOL_T1)) {

+		length--;

+		rx_ptr = cmd+11;

+	}

+

 	if (length <= *rx_length)

 		*rx_length = length;

 	else

@@ -1581,7 +1630,7 @@ time_request:

 		return_value = IFD_COMMUNICATION_ERROR;

 	}

 	else

-		memcpy(rx_buffer, cmd+10, length);

+		memcpy(rx_buffer, rx_ptr, length);

 	/* Extended case?

 	 * Only valid for RDR_to_PC_DataBlock frames */