ccid/src/ccid_serial.c

/*
 * ccid_serial.c: communicate with a GemPC Twin smart card reader
 * Copyright (C) 2001-2003 Ludovic Rousseau <ludovic.rousseau@free.fr>
 *
 * Thanks to Niki W. Waibel <niki.waibel@gmx.net> for a prototype version
 * 
 * This program is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along 
 * with this program; if not, write to the Free Software Foundation, Inc., 
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */

/*
 * $Id$
 */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>

#include "defs.h"
#include "ccid_ifdhandler.h"
#include "config.h"
#include "debug.h"
#include "ccid.h"
#include "utils.h"

/* communication timeout in seconds */
#define SERIAL_TIMEOUT 2

#define SYNC 0x03
#define CTRL_ACK 0x06
#define CTRL_NAK 0x15
#define RDR_to_PC_NotifySlotChange 0x50
#define CARD_ABSENT 0x02
#define CARD_PRESENT 0x03

/*
 * normal command:
 * 1 : SYNC
 * 1 : CTRL
 * 10 +data length : CCID command
 * 1 : LRC
 *
 * SYNC : 0x03
 * CTRL : ACK (0x06) or NAK (0x15)
 * CCID command : see USB CCID specs
 * LRC : xor of all the previous byes
 *
 * Error message:
 * 1 : SYNC (0x03)
 * 1 : CTRL (NAK: 0x15)
 * 1 : LRC (0x16)
 *
 * Card insertion/withdrawal
 * 1 : RDR_to_PC_NotifySlotChange (0x50)
 * 1 : bmSlotIccState
 *     0x02 if card absent
 *     0x03 is card present
 *
 * Time request
 * T=1 : normal CCID command
 * T=0 : 1 byte (value between 0x80 and 0xFF)
 *
 */

/*
 * You may get read timeout after a card movement.
 * This is because you will get the echo of the CCID command
 * but not the result of the command.
 *
 * This is not an applicative issue since the card is either removed (and
 * powered off) or just inserted (and not yet powered on).
 */

/* 271 = max size for short APDU
 * 2 bytes for header
 * 1 byte checksum
 * doubled for echo
 */
#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2

typedef struct
{
        /*
         * File handle on the serial port
         */
        int fd;

        /*
         * device used ("/dev/ttyS?" under Linux)
         */
        char *device;

        /*
         * serial communication buffer
         */
        unsigned char buffer[GEMPCTWIN_MAXBUF];

        /*
         * next available byte
         */
        int buffer_offset;

        /*
         * number of available bytes
         */
        int buffer_offset_last;

        /*
         * CCID infos common to USB and serial
         */
        _ccid_descriptor ccid;

} _serialDevice;

/* The _serialDevice structure must be defined before including ccid_serial.h */
#include "ccid_serial.h"

/* no need to initialize to 0 since it is static */
static _serialDevice serialDevice[PCSCLITE_MAX_READERS];

/*****************************************************************************
 * 
 *                              WriteSerial: Send bytes to the card reader
 *
 *****************************************************************************/
status_t WriteSerial(int lun, unsigned int length, unsigned char *buffer)
{
        int i;
        unsigned char lrc;
        unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];

#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "-> 121234 ";

        sprintf(debug_header, "-> %06X ", (int)lun);
#endif

        if (length > GEMPCTWIN_MAXBUF-3)
        {
                DEBUG_CRITICAL3("command too long: %d for max %d",
                        length, GEMPCTWIN_MAXBUF-3);
                return STATUS_UNSUCCESSFUL;
        }

        /* header */
        low_level_buffer[0] = 0x03;     /* SYNC */
        low_level_buffer[1] = 0x06;     /* ACK */

        /* CCID command */
        memcpy(low_level_buffer+2, buffer, length);

        /* checksum */
        lrc = 0;
        for(i=0; i<length+2; i++)
                lrc ^= low_level_buffer[i];
        low_level_buffer[length+2] = lrc;

#ifdef DEBUG_LEVEL_COMM
        DEBUG_XXD(debug_header, low_level_buffer, length+3);
#endif

        if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
                length+3) != length+3)
        {
                DEBUG_CRITICAL2("write error: %s", strerror(errno));
                return STATUS_UNSUCCESSFUL;
        }

        return STATUS_SUCCESS;
} /* WriteSerial */


/*****************************************************************************
 * 
 *                              ReadSerial: Receive bytes from the card reader
 *
 *****************************************************************************/
status_t ReadSerial(int lun, unsigned int *length, unsigned char *buffer)
{
        unsigned char c;
        int rv;
        int echo;
        int to_read;
        int i;

        /* we get the echo first */
        echo = TRUE;

start:
        DEBUG_COMM("start");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == RDR_to_PC_NotifySlotChange)
                goto slot_change;

        if (c == SYNC)
                goto sync;

        if (c >= 0x80)
        {       
                DEBUG_COMM2("time request: 0x%02X", c);
                goto start;
        }

        DEBUG_CRITICAL2("Got 0x%02X", c);
        return STATUS_COMM_ERROR;

slot_change:
        DEBUG_COMM("slot change");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == CARD_ABSENT)
        {
                DEBUG_COMM("Card removed");
        }
        else
                if (c == CARD_PRESENT)
                {
                        DEBUG_COMM("Card inserted");
                }
                else
                {
                        DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
                }
        goto start;

sync:
        DEBUG_COMM("sync");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == CTRL_ACK)
                goto ack;

        if (c == CTRL_NAK)
                goto nak;

        DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
        return STATUS_COMM_ERROR;

nak:
        DEBUG_COMM("nak");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c != (SYNC ^ CTRL_NAK))
        {
                DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
                return STATUS_COMM_ERROR;
        }
        else
                goto start;

ack:
        DEBUG_COMM("ack");
        /* normal CCID frame */
        if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
                return rv;

        /* total frame size */
        to_read = 10+dw2i(buffer, 1);

        DEBUG_COMM2("frame size: %d", to_read);
        if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
                return rv;

#ifdef DEBUG_LEVEL_COMM
                DEBUG_XXD("frame: ", buffer, to_read);
#endif

        /* lrc */
        DEBUG_COMM("lrc");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        DEBUG_COMM2("lrc: 0x%02X", c);
        for (i=0; i<to_read; i++)
                c ^= buffer[i];

        if (c != (SYNC ^ CTRL_ACK))
                DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);

        if (echo)
        {
                echo = FALSE;
                goto start;
        }

        return STATUS_SUCCESS;
} /* ReadSerial */


/*****************************************************************************
 * 
 *                              get_bytes: get n bytes
 *
 *****************************************************************************/
int get_bytes(int lun, unsigned char *buffer, int length)
{
        int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
        int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;

        DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
                length);
        /* enough data are available */
        if (offset + length <= offset_last)
        {
                DEBUG_COMM("data available");
                memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
                serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
        }
        else
        {
                int present, rv;

                /* copy available data */
                present = offset_last - offset;

                if (present > 0)
                {
                        DEBUG_COMM2("some data available: %d", present);
                        memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
                                present);
                }

                /* get fresh data */
                DEBUG_COMM2("get more data: %d", length - present);
                rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
                if (rv < 0)
                        return STATUS_COMM_ERROR;

                /* fill the buffer */
                memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
                        length - present);
                serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
                serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
                DEBUG_COMM3("offset: %d, last_offset: %d",
                        serialDevice[LunToReaderIndex(lun)].buffer_offset,
                        serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
        }

        return STATUS_SUCCESS;
} /* get_bytes */


/*****************************************************************************
 * 
 *                              ReadChunk: read a minimum number of bytes
 *
 *****************************************************************************/
int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
{
        int fd = serialDevice[LunToReaderIndex(lun)].fd;
        fd_set fdset;
        struct timeval t;
        int i, rv = 0;
        int already_read;
#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "<- 121234 ";

        sprintf(debug_header, "<- %06X ", (int)lun);
#endif

        already_read = 0;
        while (already_read < min_length)
        {
                /* use select() to, eventually, timeout */
                FD_ZERO(&fdset);
                FD_SET(fd, &fdset);
                t.tv_sec = SERIAL_TIMEOUT;
                t.tv_usec = 0;

                i = select(fd+1, &fdset, NULL, NULL, &t);
                if (i == -1)
                {
                        DEBUG_CRITICAL2("select: %s", strerror(errno));
                        return -1;
                }
                else
                        if (i == 0)
                        {
                                DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
                                return -1;
                        }

                rv = read(fd, buffer + already_read, buffer_length - already_read);
                if (rv < 0)
                {
                        DEBUG_COMM2("read error: %s", strerror(errno));
                        return -1;
                }

#ifdef DEBUG_LEVEL_COMM
                DEBUG_XXD(debug_header, buffer + already_read, rv);
#endif

                already_read += rv;
                DEBUG_COMM3("read: %d, to read: %d", already_read,
                        min_length);
        }

        return already_read;
} /* ReadChunk */


/*****************************************************************************
 * 
 *                              OpenSerial: open the port
 *
 *****************************************************************************/
status_t OpenSerial(int lun, int channel)
{
        char dev_name[FILENAME_MAX];

        DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);

        /*
         * Conversion of old-style ifd-hanler 1.0 CHANNELID 
         */
        if (channel == 0x0103F8)
                channel = 1;
        else
                if (channel == 0x0102F8)
                        channel = 2;
                else
                        if (channel == 0x0103E8)
                                channel = 3;
                        else
                                if (channel == 0x0102E8)
                                        channel = 4;

        if (channel < 0)
        {
                DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
                return STATUS_UNSUCCESSFUL;
        }

        sprintf(dev_name, "/dev/pcsc/%d", (int) channel);

        return OpenSerialByName(lun, dev_name);
} /* OpenSerial */

/*****************************************************************************
 * 
 *                              OpenSerialByName: open the port
 *
 *****************************************************************************/
status_t OpenSerialByName(int lun, char *dev_name)
{
        struct termios current_termios;
        int i;
        int reader = LunToReaderIndex(lun);

        DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);

        /* check if the same channel is not already used */
        for (i=0; i<PCSCLITE_MAX_READERS; i++)
        {
                if (serialDevice[i].device &&
                        strcmp(serialDevice[i].device, dev_name) == 0)
                {
                        DEBUG_CRITICAL2("Device %s already in use", dev_name);
                        return STATUS_UNSUCCESSFUL;
                }
        }

        serialDevice[reader].fd = open(dev_name, O_RDWR | O_NOCTTY);

        if (-1 == serialDevice[reader].fd)
        {
                DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
                return STATUS_UNSUCCESSFUL;
        }

        /* set channel used */
        serialDevice[reader].device = strdup(dev_name);

        /* empty in and out serial buffers */
        if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
                        DEBUG_INFO2("tcflush() function error: %s", strerror(errno));

        /* get config attributes */
        if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
        {
                DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
                close(serialDevice[reader].fd);
                serialDevice[reader].fd = -1;

                return STATUS_UNSUCCESSFUL;
        }

        /* IGNBRK: ignore BREAK condition on input
         * IGNPAR: ignore framing errors and parity errors. */
        current_termios.c_iflag = IGNBRK | IGNPAR;
        current_termios.c_oflag = 0;    /* Raw output modes */
        /* CS8: 8-bits character size
         * CSTOPB: set two stop bits
         * CREAD: enable receiver
         * CLOCAL: ignore modem control lines */
        current_termios.c_cflag = CS8 | CSTOPB | CREAD | CLOCAL;

        /* Do not echo characters because if you connect to a host it or your modem
         * will echo characters for you.  Don't generate signals. */
        current_termios.c_lflag = 0;

        /* set serial port speed to 115200 bauds */
        cfsetspeed(&current_termios, B115200);

        DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
        if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
        {
                close(serialDevice[reader].fd);
                serialDevice[reader].fd = -1;
                DEBUG_INFO2("tcsetattr error: %s", strerror(errno));

                return STATUS_UNSUCCESSFUL;
        }

        serialDevice[reader].ccid.bSeq = 0;
        serialDevice[reader].ccid.readerID = GEMPCTWIN;
        serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
        serialDevice[reader].ccid.dwMaxIFSD = 254;
        serialDevice[reader].ccid.dwFeatures = 0x00010230;
        serialDevice[reader].ccid.dwDefaultClock = 4000;
        serialDevice[reader].ccid.dwMaxDataRate = 344086;

        serialDevice[reader].buffer_offset = 0;
        serialDevice[reader].buffer_offset_last = 0;

        return STATUS_SUCCESS;
} /* OpenSerialByName */


/*****************************************************************************
 * 
 *                              CloseSerial: close the port
 *
 *****************************************************************************/
status_t CloseSerial(int lun)
{
        int reader = LunToReaderIndex(lun);

        close(serialDevice[reader].fd);
        serialDevice[reader].fd = -1;

        free(serialDevice[reader].device);
        serialDevice[reader].device = NULL;

        return STATUS_SUCCESS;
} /* CloseSerial */


/*****************************************************************************
 *
 *                                      get_ccid_descriptor
 *
 ****************************************************************************/
_ccid_descriptor *get_ccid_descriptor(int lun)
{
        return &serialDevice[LunToReaderIndex(lun)].ccid;
} /* get_ccid_descriptor */


1	/*
2	* ccid_serial.c: communicate with a GemPC Twin smart card reader
3	* Copyright (C) 2001-2003 Ludovic Rousseau <ludovic.rousseau@free.fr>
4	*
5	* Thanks to Niki W. Waibel <niki.waibel@gmx.net> for a prototype version
6	*
7	* This program is free software; you can redistribute it and/or modify it
8	* under the terms of the GNU General Public License as published by the
9	* Free Software Foundation; either version 2 of the License, or (at your
10	* option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful, but
13	* WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License along
18	* with this program; if not, write to the Free Software Foundation, Inc.,
19	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20	*/
21
22	/*
23	* $Id$
24	*/
25
26	#include <stdio.h>
27	#include <stdlib.h>
28	#include <fcntl.h>
29	#include <unistd.h>
30	#include <termios.h>
31	#include <string.h>
32	#include <errno.h>
33	#include <sys/time.h>
34	#include <sys/types.h>
35
36	#include "defs.h"
37	#include "ccid_ifdhandler.h"
38	#include "config.h"
39	#include "debug.h"
40	#include "ccid.h"
41	#include "utils.h"
42
43	/* communication timeout in seconds */
44	#define SERIAL_TIMEOUT 2
45
46	#define SYNC 0x03
47	#define CTRL_ACK 0x06
48	#define CTRL_NAK 0x15
49	#define RDR_to_PC_NotifySlotChange 0x50
50	#define CARD_ABSENT 0x02
51	#define CARD_PRESENT 0x03
52
53	/*
54	* normal command:
55	* 1 : SYNC
56	* 1 : CTRL
57	* 10 +data length : CCID command
58	* 1 : LRC
59	*
60	* SYNC : 0x03
61	* CTRL : ACK (0x06) or NAK (0x15)
62	* CCID command : see USB CCID specs
63	* LRC : xor of all the previous byes
64	*
65	* Error message:
66	* 1 : SYNC (0x03)
67	* 1 : CTRL (NAK: 0x15)
68	* 1 : LRC (0x16)
69	*
70	* Card insertion/withdrawal
71	* 1 : RDR_to_PC_NotifySlotChange (0x50)
72	* 1 : bmSlotIccState
73	* 0x02 if card absent
74	* 0x03 is card present
75	*
76	* Time request
77	* T=1 : normal CCID command
78	* T=0 : 1 byte (value between 0x80 and 0xFF)
79	*
80	*/
81
82	/*
83	* You may get read timeout after a card movement.
84	* This is because you will get the echo of the CCID command
85	* but not the result of the command.
86	*
87	* This is not an applicative issue since the card is either removed (and
88	* powered off) or just inserted (and not yet powered on).
89	*/
90
91	/* 271 = max size for short APDU
92	* 2 bytes for header
93	* 1 byte checksum
94	* doubled for echo
95	*/
96	#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2
97
98	typedef struct
99	{
100	/*
101	* File handle on the serial port
102	*/
103	int fd;
104
105	/*
106	* device used ("/dev/ttyS?" under Linux)
107	*/
108	char *device;
109
110	/*
111	* serial communication buffer
112	*/
113	unsigned char buffer[GEMPCTWIN_MAXBUF];
114
115	/*
116	* next available byte
117	*/
118	int buffer_offset;
119
120	/*
121	* number of available bytes
122	*/
123	int buffer_offset_last;
124
125	/*
126	* CCID infos common to USB and serial
127	*/
128	_ccid_descriptor ccid;
129
130	} _serialDevice;
131
132	/* The _serialDevice structure must be defined before including ccid_serial.h */
133	#include "ccid_serial.h"
134
135	/* no need to initialize to 0 since it is static */
136	static _serialDevice serialDevice[PCSCLITE_MAX_READERS];
137
138	/*****************************************************************************
139	*
140	* WriteSerial: Send bytes to the card reader
141	*
142	*****************************************************************************/
143	status_t WriteSerial(int lun, unsigned int length, unsigned char *buffer)
144	{
145	int i;
146	unsigned char lrc;
147	unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];
148
149	#ifdef DEBUG_LEVEL_COMM
150	char debug_header[] = "-> 121234 ";
151
152	sprintf(debug_header, "-> %06X ", (int)lun);
153	#endif
154
155	if (length > GEMPCTWIN_MAXBUF-3)
156	{
157	DEBUG_CRITICAL3("command too long: %d for max %d",
158	length, GEMPCTWIN_MAXBUF-3);
159	return STATUS_UNSUCCESSFUL;
160	}
161
162	/* header */
163	low_level_buffer[0] = 0x03; /* SYNC */
164	low_level_buffer[1] = 0x06; /* ACK */
165
166	/* CCID command */
167	memcpy(low_level_buffer+2, buffer, length);
168
169	/* checksum */
170	lrc = 0;
171	for(i=0; i<length+2; i++)
172	lrc ^= low_level_buffer[i];
173	low_level_buffer[length+2] = lrc;
174
175	#ifdef DEBUG_LEVEL_COMM
176	DEBUG_XXD(debug_header, low_level_buffer, length+3);
177	#endif
178
179	if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
180	length+3) != length+3)
181	{
182	DEBUG_CRITICAL2("write error: %s", strerror(errno));
183	return STATUS_UNSUCCESSFUL;
184	}
185
186	return STATUS_SUCCESS;
187	} /* WriteSerial */
188
189
190	/*****************************************************************************
191	*
192	* ReadSerial: Receive bytes from the card reader
193	*
194	*****************************************************************************/
195	status_t ReadSerial(int lun, unsigned int length, unsigned char buffer)
196	{
197	unsigned char c;
198	int rv;
199	int echo;
200	int to_read;
201	int i;
202
203	/* we get the echo first */
204	echo = TRUE;
205
206	start:
207	DEBUG_COMM("start");
208	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
209	return rv;
210
211	if (c == RDR_to_PC_NotifySlotChange)
212	goto slot_change;
213
214	if (c == SYNC)
215	goto sync;
216
217	if (c >= 0x80)
218	{
219	DEBUG_COMM2("time request: 0x%02X", c);
220	goto start;
221	}
222
223	DEBUG_CRITICAL2("Got 0x%02X", c);
224	return STATUS_COMM_ERROR;
225
226	slot_change:
227	DEBUG_COMM("slot change");
228	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
229	return rv;
230
231	if (c == CARD_ABSENT)
232	{
233	DEBUG_COMM("Card removed");
234	}
235	else
236	if (c == CARD_PRESENT)
237	{
238	DEBUG_COMM("Card inserted");
239	}
240	else
241	{
242	DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
243	}
244	goto start;
245
246	sync:
247	DEBUG_COMM("sync");
248	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
249	return rv;
250
251	if (c == CTRL_ACK)
252	goto ack;
253
254	if (c == CTRL_NAK)
255	goto nak;
256
257	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
258	return STATUS_COMM_ERROR;
259
260	nak:
261	DEBUG_COMM("nak");
262	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
263	return rv;
264
265	if (c != (SYNC ^ CTRL_NAK))
266	{
267	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
268	return STATUS_COMM_ERROR;
269	}
270	else
271	goto start;
272
273	ack:
274	DEBUG_COMM("ack");
275	/* normal CCID frame */
276	if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
277	return rv;
278
279	/* total frame size */
280	to_read = 10+dw2i(buffer, 1);
281
282	DEBUG_COMM2("frame size: %d", to_read);
283	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
284	return rv;
285
286	#ifdef DEBUG_LEVEL_COMM
287	DEBUG_XXD("frame: ", buffer, to_read);
288	#endif
289
290	/* lrc */
291	DEBUG_COMM("lrc");
292	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
293	return rv;
294
295	DEBUG_COMM2("lrc: 0x%02X", c);
296	for (i=0; i<to_read; i++)
297	c ^= buffer[i];
298
299	if (c != (SYNC ^ CTRL_ACK))
300	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
301
302	if (echo)
303	{
304	echo = FALSE;
305	goto start;
306	}
307
308	return STATUS_SUCCESS;
309	} /* ReadSerial */
310
311
312	/*****************************************************************************
313	*
314	* get_bytes: get n bytes
315	*
316	*****************************************************************************/
317	int get_bytes(int lun, unsigned char *buffer, int length)
318	{
319	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
320	int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
321
322	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
323	length);
324	/* enough data are available */
325	if (offset + length <= offset_last)
326	{
327	DEBUG_COMM("data available");
328	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
329	serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
330	}
331	else
332	{
333	int present, rv;
334
335	/* copy available data */
336	present = offset_last - offset;
337
338	if (present > 0)
339	{
340	DEBUG_COMM2("some data available: %d", present);
341	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
342	present);
343	}
344
345	/* get fresh data */
346	DEBUG_COMM2("get more data: %d", length - present);
347	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
348	if (rv < 0)
349	return STATUS_COMM_ERROR;
350
351	/* fill the buffer */
352	memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
353	length - present);
354	serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
355	serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
356	DEBUG_COMM3("offset: %d, last_offset: %d",
357	serialDevice[LunToReaderIndex(lun)].buffer_offset,
358	serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
359	}
360
361	return STATUS_SUCCESS;
362	} /* get_bytes */
363
364
365	/*****************************************************************************
366	*
367	* ReadChunk: read a minimum number of bytes
368	*
369	*****************************************************************************/
370	int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
371	{
372	int fd = serialDevice[LunToReaderIndex(lun)].fd;
373	fd_set fdset;
374	struct timeval t;
375	int i, rv = 0;
376	int already_read;
377	#ifdef DEBUG_LEVEL_COMM
378	char debug_header[] = "<- 121234 ";
379
380	sprintf(debug_header, "<- %06X ", (int)lun);
381	#endif
382
383	already_read = 0;
384	while (already_read < min_length)
385	{
386	/* use select() to, eventually, timeout */
387	FD_ZERO(&fdset);
388	FD_SET(fd, &fdset);
389	t.tv_sec = SERIAL_TIMEOUT;
390	t.tv_usec = 0;
391
392	i = select(fd+1, &fdset, NULL, NULL, &t);
393	if (i == -1)
394	{
395	DEBUG_CRITICAL2("select: %s", strerror(errno));
396	return -1;
397	}
398	else
399	if (i == 0)
400	{
401	DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
402	return -1;
403	}
404
405	rv = read(fd, buffer + already_read, buffer_length - already_read);
406	if (rv < 0)
407	{
408	DEBUG_COMM2("read error: %s", strerror(errno));
409	return -1;
410	}
411
412	#ifdef DEBUG_LEVEL_COMM
413	DEBUG_XXD(debug_header, buffer + already_read, rv);
414	#endif
415
416	already_read += rv;
417	DEBUG_COMM3("read: %d, to read: %d", already_read,
418	min_length);
419	}
420
421	return already_read;
422	} /* ReadChunk */
423
424
425	/*****************************************************************************
426	*
427	* OpenSerial: open the port
428	*
429	*****************************************************************************/
430	status_t OpenSerial(int lun, int channel)
431	{
432	char dev_name[FILENAME_MAX];
433
434	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
435
436	/*
437	* Conversion of old-style ifd-hanler 1.0 CHANNELID
438	*/
439	if (channel == 0x0103F8)
440	channel = 1;
441	else
442	if (channel == 0x0102F8)
443	channel = 2;
444	else
445	if (channel == 0x0103E8)
446	channel = 3;
447	else
448	if (channel == 0x0102E8)
449	channel = 4;
450
451	if (channel < 0)
452	{
453	DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
454	return STATUS_UNSUCCESSFUL;
455	}
456
457	sprintf(dev_name, "/dev/pcsc/%d", (int) channel);
458
459	return OpenSerialByName(lun, dev_name);
460	} /* OpenSerial */
461
462	/*****************************************************************************
463	*
464	* OpenSerialByName: open the port
465	*
466	*****************************************************************************/
467	status_t OpenSerialByName(int lun, char *dev_name)
468	{
469	struct termios current_termios;
470	int i;
471	int reader = LunToReaderIndex(lun);
472
473	DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);
474
475	/* check if the same channel is not already used */
476	for (i=0; i<PCSCLITE_MAX_READERS; i++)
477	{
478	if (serialDevice[i].device &&
479	strcmp(serialDevice[i].device, dev_name) == 0)
480	{
481	DEBUG_CRITICAL2("Device %s already in use", dev_name);
482	return STATUS_UNSUCCESSFUL;
483	}
484	}
485
486	serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
487
488	if (-1 == serialDevice[reader].fd)
489	{
490	DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
491	return STATUS_UNSUCCESSFUL;
492	}
493
494	/* set channel used */
495	serialDevice[reader].device = strdup(dev_name);
496
497	/* empty in and out serial buffers */
498	if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
499	DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
500
501	/* get config attributes */
502	if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
503	{
504	DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
505	close(serialDevice[reader].fd);
506	serialDevice[reader].fd = -1;
507
508	return STATUS_UNSUCCESSFUL;
509	}
510
511	/* IGNBRK: ignore BREAK condition on input
512	* IGNPAR: ignore framing errors and parity errors. */
513	current_termios.c_iflag = IGNBRK \| IGNPAR;
514	current_termios.c_oflag = 0; /* Raw output modes */
515	/* CS8: 8-bits character size
516	* CSTOPB: set two stop bits
517	* CREAD: enable receiver
518	* CLOCAL: ignore modem control lines */
519	current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
520
521	/* Do not echo characters because if you connect to a host it or your modem
522	* will echo characters for you. Don't generate signals. */
523	current_termios.c_lflag = 0;
524
525	/* set serial port speed to 115200 bauds */
526	cfsetspeed(&current_termios, B115200);
527
528	DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
529	if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
530	{
531	close(serialDevice[reader].fd);
532	serialDevice[reader].fd = -1;
533	DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
534
535	return STATUS_UNSUCCESSFUL;
536	}
537
538	serialDevice[reader].ccid.bSeq = 0;
539	serialDevice[reader].ccid.readerID = GEMPCTWIN;
540	serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
541	serialDevice[reader].ccid.dwMaxIFSD = 254;
542	serialDevice[reader].ccid.dwFeatures = 0x00010230;
543	serialDevice[reader].ccid.dwDefaultClock = 4000;
544	serialDevice[reader].ccid.dwMaxDataRate = 344086;
545
546	serialDevice[reader].buffer_offset = 0;
547	serialDevice[reader].buffer_offset_last = 0;
548
549	return STATUS_SUCCESS;
550	} /* OpenSerialByName */
551
552
553	/*****************************************************************************
554	*
555	* CloseSerial: close the port
556	*
557	*****************************************************************************/
558	status_t CloseSerial(int lun)
559	{
560	int reader = LunToReaderIndex(lun);
561
562	close(serialDevice[reader].fd);
563	serialDevice[reader].fd = -1;
564
565	free(serialDevice[reader].device);
566	serialDevice[reader].device = NULL;
567
568	return STATUS_SUCCESS;
569	} /* CloseSerial */
570
571
572	/*****************************************************************************
573	*
574	* get_ccid_descriptor
575	*
576	****************************************************************************/
577	_ccid_descriptor *get_ccid_descriptor(int lun)
578	{
579	return &serialDevice[LunToReaderIndex(lun)].ccid;
580	} /* get_ccid_descriptor */
581
582
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svn:keywords	Author Date Id Revision