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 <PCSC/ifdhandler.h>

#include "defs.h"
#include "ccid_ifdhandler.h"
#include "config.h"
#include "debug.h"
#include "ccid.h"
#include "utils.h"
#include "commands.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)
         */
        /*@null@*/ 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[CCID_DRIVER_MAX_READERS];

/* unexported functions */
static int ReadChunk(unsigned int lun, unsigned char *buffer, int buffer_length,
        int min_length);

static int get_bytes(unsigned int lun, unsigned char *buffer, int length);


/*****************************************************************************
 * 
 *                              WriteSerial: Send bytes to the card reader
 *
 *****************************************************************************/
status_t WriteSerial(unsigned 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[] = "-> 123456 ";

        sprintf(debug_header, "-> %06X ", 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(unsigned int lun, /*@unused@*/ 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", c);
                }
        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(unsigned 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
 *
 *****************************************************************************/
static int ReadChunk(unsigned int lun, unsigned char *buffer,
        int buffer_length, int min_length)
{
        int fd = serialDevice[LunToReaderIndex(lun)].fd;
# ifndef S_SPLINT_S
        fd_set fdset;
# endif
        struct timeval t;
        int i, rv = 0;
        int already_read;
#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "<- 123456 ";

        sprintf(debug_header, "<- %06X ", 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(unsigned 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(unsigned int lun, char *dev_name)
{
        struct termios current_termios;
        int i;
        unsigned 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<CCID_DRIVER_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.bPINSupport = 0x0;
        serialDevice[reader].ccid.dwDefaultClock = 4000;
        serialDevice[reader].ccid.dwMaxDataRate = 344086;
        serialDevice[reader].ccid.bMaxSlotIndex = 0;
        serialDevice[reader].ccid.bCurrentSlotIndex = 0;

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

        /* perform a command to be sure a GemPC Twin reader is connected
         * get the reader firmware */
        {
                unsigned char tx_buffer[] = "\x02";
                unsigned char rx_buffer[50];
                unsigned int rx_length = sizeof(rx_buffer);

                if (IFD_SUCCESS != CmdEscape(lun, tx_buffer, sizeof(tx_buffer),
                        rx_buffer, &rx_length))
                {
                        DEBUG_CRITICAL("Get firmware failed. Maybe the reader is not co,,ected");
                        return STATUS_UNSUCCESSFUL;
                }

                rx_buffer[rx_length] = '\0';
                DEBUG_INFO2("Firmware: %s", rx_buffer);
        }

        return STATUS_SUCCESS;
} /* OpenSerialByName */


/*****************************************************************************
 * 
 *                              CloseSerial: close the port
 *
 *****************************************************************************/
status_t CloseSerial(unsigned int lun)
{
        unsigned 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(unsigned int lun)
{
        return &serialDevice[LunToReaderIndex(lun)].ccid;
} /* get_ccid_descriptor */


1	rousseau	414	/*
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	rousseau	1022	#include <PCSC/ifdhandler.h>
36	rousseau	414
37	rousseau	877	#include "defs.h"
38			#include "ccid_ifdhandler.h"
39	rousseau	414	#include "config.h"
40			#include "debug.h"
41			#include "ccid.h"
42			#include "utils.h"
43	rousseau	1022	#include "commands.h"
44	rousseau	414
45			/* communication timeout in seconds */
46	rousseau	453	#define SERIAL_TIMEOUT 2
47	rousseau	414
48			#define SYNC 0x03
49			#define CTRL_ACK 0x06
50			#define CTRL_NAK 0x15
51			#define RDR_to_PC_NotifySlotChange 0x50
52			#define CARD_ABSENT 0x02
53			#define CARD_PRESENT 0x03
54
55			/*
56			* normal command:
57			* 1 : SYNC
58			* 1 : CTRL
59			* 10 +data length : CCID command
60			* 1 : LRC
61			*
62			* SYNC : 0x03
63			* CTRL : ACK (0x06) or NAK (0x15)
64			* CCID command : see USB CCID specs
65			* LRC : xor of all the previous byes
66			*
67			* Error message:
68			* 1 : SYNC (0x03)
69			* 1 : CTRL (NAK: 0x15)
70			* 1 : LRC (0x16)
71			*
72			* Card insertion/withdrawal
73			* 1 : RDR_to_PC_NotifySlotChange (0x50)
74			* 1 : bmSlotIccState
75			* 0x02 if card absent
76			* 0x03 is card present
77			*
78			* Time request
79			* T=1 : normal CCID command
80			* T=0 : 1 byte (value between 0x80 and 0xFF)
81			*
82			*/
83
84	rousseau	453	/*
85			* You may get read timeout after a card movement.
86			* This is because you will get the echo of the CCID command
87			* but not the result of the command.
88			*
89			* This is not an applicative issue since the card is either removed (and
90			* powered off) or just inserted (and not yet powered on).
91			*/
92
93			/* 271 = max size for short APDU
94			* 2 bytes for header
95			* 1 byte checksum
96			* doubled for echo
97			*/
98			#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2
99
100	rousseau	414	typedef struct
101			{
102			/*
103			* File handle on the serial port
104			*/
105			int fd;
106
107			/*
108	rousseau	649	* device used ("/dev/ttyS?" under Linux)
109	rousseau	414	*/
110	rousseau	1054	/@null@/ char *device;
111	rousseau	414
112			/*
113	rousseau	453	* serial communication buffer
114			*/
115			unsigned char buffer[GEMPCTWIN_MAXBUF];
116
117			/*
118			* next available byte
119			*/
120			int buffer_offset;
121
122			/*
123			* number of available bytes
124			*/
125			int buffer_offset_last;
126
127			/*
128	rousseau	414	* CCID infos common to USB and serial
129			*/
130			_ccid_descriptor ccid;
131
132			} _serialDevice;
133
134			/* The _serialDevice structure must be defined before including ccid_serial.h */
135			#include "ccid_serial.h"
136
137	rousseau	892	/* no need to initialize to 0 since it is static */
138	rousseau	1077	static _serialDevice serialDevice[CCID_DRIVER_MAX_READERS];
139	rousseau	414
140	rousseau	1050	/* unexported functions */
141			static int ReadChunk(unsigned int lun, unsigned char *buffer, int buffer_length,
142			int min_length);
143
144			static int get_bytes(unsigned int lun, unsigned char *buffer, int length);
145
146
147	rousseau	414	/*****************************************************************************
148			*
149			* WriteSerial: Send bytes to the card reader
150			*
151			*****************************************************************************/
152	rousseau	1043	status_t WriteSerial(unsigned int lun, unsigned int length, unsigned char *buffer)
153	rousseau	414	{
154			int i;
155			unsigned char lrc;
156			unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];
157
158			#ifdef DEBUG_LEVEL_COMM
159	rousseau	1047	char debug_header[] = "-> 123456 ";
160	rousseau	414
161	rousseau	1043	sprintf(debug_header, "-> %06X ", lun);
162	rousseau	414	#endif
163
164			if (length > GEMPCTWIN_MAXBUF-3)
165			{
166	rousseau	608	DEBUG_CRITICAL3("command too long: %d for max %d",
167	rousseau	414	length, GEMPCTWIN_MAXBUF-3);
168			return STATUS_UNSUCCESSFUL;
169			}
170
171			/* header */
172			low_level_buffer[0] = 0x03; /* SYNC */
173			low_level_buffer[1] = 0x06; /* ACK */
174
175			/* CCID command */
176			memcpy(low_level_buffer+2, buffer, length);
177
178			/* checksum */
179			lrc = 0;
180			for(i=0; i<length+2; i++)
181			lrc ^= low_level_buffer[i];
182			low_level_buffer[length+2] = lrc;
183
184			#ifdef DEBUG_LEVEL_COMM
185			DEBUG_XXD(debug_header, low_level_buffer, length+3);
186			#endif
187
188	rousseau	453	if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
189			length+3) != length+3)
190	rousseau	414	{
191	rousseau	608	DEBUG_CRITICAL2("write error: %s", strerror(errno));
192	rousseau	414	return STATUS_UNSUCCESSFUL;
193			}
194
195			return STATUS_SUCCESS;
196			} /* WriteSerial */
197
198
199			/*****************************************************************************
200			*
201			* ReadSerial: Receive bytes from the card reader
202			*
203			*****************************************************************************/
204	rousseau	1053	status_t ReadSerial(unsigned int lun, /@unused@/ unsigned int *length,
205			unsigned char *buffer)
206	rousseau	414	{
207	rousseau	453	unsigned char c;
208			int rv;
209			int echo;
210			int to_read;
211			int i;
212	rousseau	414
213	rousseau	453	/* we get the echo first */
214			echo = TRUE;
215	rousseau	414
216	rousseau	453	start:
217	rousseau	462	DEBUG_COMM("start");
218	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
219			return rv;
220	rousseau	414
221	rousseau	453	if (c == RDR_to_PC_NotifySlotChange)
222			goto slot_change;
223	rousseau	414
224	rousseau	453	if (c == SYNC)
225			goto sync;
226	rousseau	414
227	rousseau	453	if (c >= 0x80)
228	rousseau	462	{
229			DEBUG_COMM2("time request: 0x%02X", c);
230	rousseau	453	goto start;
231	rousseau	462	}
232	rousseau	414
233	rousseau	453	DEBUG_CRITICAL2("Got 0x%02X", c);
234			return STATUS_COMM_ERROR;
235	rousseau	414
236	rousseau	453	slot_change:
237	rousseau	462	DEBUG_COMM("slot change");
238	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
239			return rv;
240	rousseau	414
241	rousseau	453	if (c == CARD_ABSENT)
242	rousseau	774	{
243	rousseau	453	DEBUG_COMM("Card removed");
244	rousseau	774	}
245	rousseau	453	else
246			if (c == CARD_PRESENT)
247	rousseau	774	{
248	rousseau	453	DEBUG_COMM("Card inserted");
249	rousseau	774	}
250	rousseau	453	else
251	rousseau	774	{
252	rousseau	1044	DEBUG_COMM2("Unknown card movement: %d", c);
253	rousseau	774	}
254	rousseau	453	goto start;
255	rousseau	414
256	rousseau	453	sync:
257	rousseau	462	DEBUG_COMM("sync");
258	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
259			return rv;
260	rousseau	414
261	rousseau	453	if (c == CTRL_ACK)
262			goto ack;
263	rousseau	414
264	rousseau	453	if (c == CTRL_NAK)
265			goto nak;
266	rousseau	414
267	rousseau	453	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
268			return STATUS_COMM_ERROR;
269	rousseau	414
270	rousseau	453	nak:
271	rousseau	462	DEBUG_COMM("nak");
272	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
273			return rv;
274	rousseau	414
275	rousseau	453	if (c != (SYNC ^ CTRL_NAK))
276	rousseau	414	{
277	rousseau	453	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
278			return STATUS_COMM_ERROR;
279	rousseau	414	}
280	rousseau	453	else
281			goto start;
282	rousseau	414
283	rousseau	453	ack:
284	rousseau	462	DEBUG_COMM("ack");
285	rousseau	453	/* normal CCID frame */
286			if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
287			return rv;
288	rousseau	414
289	rousseau	453	/* total frame size */
290			to_read = 10+dw2i(buffer, 1);
291	rousseau	414
292	rousseau	462	DEBUG_COMM2("frame size: %d", to_read);
293	rousseau	453	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
294			return rv;
295	rousseau	414
296	rousseau	462	#ifdef DEBUG_LEVEL_COMM
297			DEBUG_XXD("frame: ", buffer, to_read);
298			#endif
299
300	rousseau	453	/* lrc */
301	rousseau	462	DEBUG_COMM("lrc");
302	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
303			return rv;
304
305	rousseau	462	DEBUG_COMM2("lrc: 0x%02X", c);
306	rousseau	414	for (i=0; i<to_read; i++)
307	rousseau	453	c ^= buffer[i];
308	rousseau	414
309	rousseau	453	if (c != (SYNC ^ CTRL_ACK))
310			DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
311	rousseau	414
312	rousseau	453	if (echo)
313			{
314			echo = FALSE;
315			goto start;
316			}
317	rousseau	414
318			return STATUS_SUCCESS;
319			} /* ReadSerial */
320
321
322			/*****************************************************************************
323			*
324	rousseau	453	* get_bytes: get n bytes
325	rousseau	414	*
326			*****************************************************************************/
327	rousseau	1043	int get_bytes(unsigned int lun, unsigned char *buffer, int length)
328	rousseau	414	{
329	rousseau	453	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
330			int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
331	rousseau	414
332	rousseau	608	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
333	rousseau	462	length);
334	rousseau	453	/* enough data are available */
335			if (offset + length <= offset_last)
336	rousseau	414	{
337	rousseau	608	DEBUG_COMM("data available");
338	rousseau	453	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
339			serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
340	rousseau	414	}
341	rousseau	453	else
342	rousseau	414	{
343	rousseau	453	int present, rv;
344	rousseau	414
345	rousseau	453	/* copy available data */
346			present = offset_last - offset;
347	rousseau	414
348	rousseau	453	if (present > 0)
349	rousseau	462	{
350	rousseau	608	DEBUG_COMM2("some data available: %d", present);
351	rousseau	462	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
352			present);
353			}
354	rousseau	414
355	rousseau	453	/* get fresh data */
356	rousseau	608	DEBUG_COMM2("get more data: %d", length - present);
357	rousseau	453	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
358			if (rv < 0)
359			return STATUS_COMM_ERROR;
360	rousseau	414
361	rousseau	453	/* fill the buffer */
362			memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
363			length - present);
364			serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
365			serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
366	rousseau	608	DEBUG_COMM3("offset: %d, last_offset: %d",
367	rousseau	462	serialDevice[LunToReaderIndex(lun)].buffer_offset,
368			serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
369	rousseau	414	}
370
371	rousseau	453	return STATUS_SUCCESS;
372			} /* get_bytes */
373	rousseau	414
374	rousseau	453
375	rousseau	414	/*****************************************************************************
376			*
377			* ReadChunk: read a minimum number of bytes
378			*
379			*****************************************************************************/
380	rousseau	1050	static int ReadChunk(unsigned int lun, unsigned char *buffer,
381			int buffer_length, int min_length)
382	rousseau	414	{
383	rousseau	453	int fd = serialDevice[LunToReaderIndex(lun)].fd;
384	rousseau	1045	# ifndef S_SPLINT_S
385	rousseau	414	fd_set fdset;
386	rousseau	1045	# endif
387	rousseau	414	struct timeval t;
388	rousseau	462	int i, rv = 0;
389			int already_read;
390	rousseau	414	#ifdef DEBUG_LEVEL_COMM
391	rousseau	1047	char debug_header[] = "<- 123456 ";
392	rousseau	414
393	rousseau	1046	sprintf(debug_header, "<- %06X ", lun);
394	rousseau	414	#endif
395
396	rousseau	462	already_read = 0;
397			while (already_read < min_length)
398			{
399			/* use select() to, eventually, timeout */
400			FD_ZERO(&fdset);
401			FD_SET(fd, &fdset);
402			t.tv_sec = SERIAL_TIMEOUT;
403			t.tv_usec = 0;
404	rousseau	414
405	rousseau	462	i = select(fd+1, &fdset, NULL, NULL, &t);
406			if (i == -1)
407	rousseau	414	{
408	rousseau	462	DEBUG_CRITICAL2("select: %s", strerror(errno));
409	rousseau	414	return -1;
410			}
411	rousseau	462	else
412			if (i == 0)
413			{
414			DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
415			return -1;
416			}
417	rousseau	414
418	rousseau	462	rv = read(fd, buffer + already_read, buffer_length - already_read);
419			if (rv < 0)
420			{
421			DEBUG_COMM2("read error: %s", strerror(errno));
422			return -1;
423			}
424	rousseau	414
425	rousseau	453	#ifdef DEBUG_LEVEL_COMM
426	rousseau	462	DEBUG_XXD(debug_header, buffer + already_read, rv);
427	rousseau	453	#endif
428	rousseau	414
429	rousseau	462	already_read += rv;
430	rousseau	608	DEBUG_COMM3("read: %d, to read: %d", already_read,
431	rousseau	414	min_length);
432			}
433
434	rousseau	462	return already_read;
435	rousseau	414	} /* ReadChunk */
436
437
438			/*****************************************************************************
439			*
440			* OpenSerial: open the port
441			*
442			*****************************************************************************/
443	rousseau	1043	status_t OpenSerial(unsigned int lun, int channel)
444	rousseau	414	{
445			char dev_name[FILENAME_MAX];
446
447	rousseau	608	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
448	rousseau	414
449			/*
450			* Conversion of old-style ifd-hanler 1.0 CHANNELID
451			*/
452			if (channel == 0x0103F8)
453			channel = 1;
454			else
455			if (channel == 0x0102F8)
456			channel = 2;
457			else
458			if (channel == 0x0103E8)
459			channel = 3;
460			else
461			if (channel == 0x0102E8)
462			channel = 4;
463
464			if (channel < 0)
465			{
466			DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
467			return STATUS_UNSUCCESSFUL;
468			}
469
470			sprintf(dev_name, "/dev/pcsc/%d", (int) channel);
471
472	rousseau	649	return OpenSerialByName(lun, dev_name);
473			} /* OpenSerial */
474
475			/*****************************************************************************
476			*
477			* OpenSerialByName: open the port
478			*
479			*****************************************************************************/
480	rousseau	1043	status_t OpenSerialByName(unsigned int lun, char *dev_name)
481	rousseau	649	{
482			struct termios current_termios;
483			int i;
484	rousseau	1049	unsigned int reader = LunToReaderIndex(lun);
485	rousseau	649
486			DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);
487
488	rousseau	414	/* check if the same channel is not already used */
489	rousseau	1077	for (i=0; i<CCID_DRIVER_MAX_READERS; i++)
490	rousseau	414	{
491	rousseau	649	if (serialDevice[i].device &&
492			strcmp(serialDevice[i].device, dev_name) == 0)
493	rousseau	414	{
494	rousseau	649	DEBUG_CRITICAL2("Device %s already in use", dev_name);
495	rousseau	414	return STATUS_UNSUCCESSFUL;
496			}
497			}
498
499			serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
500
501	rousseau	892	if (-1 == serialDevice[reader].fd)
502	rousseau	414	{
503			DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
504			return STATUS_UNSUCCESSFUL;
505			}
506
507			/* set channel used */
508	rousseau	649	serialDevice[reader].device = strdup(dev_name);
509	rousseau	414
510			/* empty in and out serial buffers */
511			if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
512			DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
513
514			/* get config attributes */
515			if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
516			{
517			DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
518			close(serialDevice[reader].fd);
519			serialDevice[reader].fd = -1;
520
521			return STATUS_UNSUCCESSFUL;
522			}
523
524			/* IGNBRK: ignore BREAK condition on input
525			* IGNPAR: ignore framing errors and parity errors. */
526			current_termios.c_iflag = IGNBRK \| IGNPAR;
527			current_termios.c_oflag = 0; /* Raw output modes */
528			/* CS8: 8-bits character size
529			* CSTOPB: set two stop bits
530			* CREAD: enable receiver
531			* CLOCAL: ignore modem control lines */
532			current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
533
534			/* Do not echo characters because if you connect to a host it or your modem
535			* will echo characters for you. Don't generate signals. */
536			current_termios.c_lflag = 0;
537
538			/* set serial port speed to 115200 bauds */
539			cfsetspeed(&current_termios, B115200);
540
541			DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
542			if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
543			{
544			close(serialDevice[reader].fd);
545			serialDevice[reader].fd = -1;
546			DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
547
548			return STATUS_UNSUCCESSFUL;
549			}
550
551			serialDevice[reader].ccid.bSeq = 0;
552			serialDevice[reader].ccid.readerID = GEMPCTWIN;
553			serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
554	rousseau	672	serialDevice[reader].ccid.dwMaxIFSD = 254;
555	rousseau	414	serialDevice[reader].ccid.dwFeatures = 0x00010230;
556	rousseau	900	serialDevice[reader].ccid.bPINSupport = 0x0;
557	rousseau	694	serialDevice[reader].ccid.dwDefaultClock = 4000;
558			serialDevice[reader].ccid.dwMaxDataRate = 344086;
559	rousseau	1091	serialDevice[reader].ccid.bMaxSlotIndex = 0;
560			serialDevice[reader].ccid.bCurrentSlotIndex = 0;
561	rousseau	414
562	rousseau	453	serialDevice[reader].buffer_offset = 0;
563			serialDevice[reader].buffer_offset_last = 0;
564
565	rousseau	1022	/* perform a command to be sure a GemPC Twin reader is connected
566			* get the reader firmware */
567			{
568	rousseau	1048	unsigned char tx_buffer[] = "\x02";
569			unsigned char rx_buffer[50];
570			unsigned int rx_length = sizeof(rx_buffer);
571	rousseau	1022
572			if (IFD_SUCCESS != CmdEscape(lun, tx_buffer, sizeof(tx_buffer),
573			rx_buffer, &rx_length))
574			{
575			DEBUG_CRITICAL("Get firmware failed. Maybe the reader is not co,,ected");
576			return STATUS_UNSUCCESSFUL;
577			}
578
579			rx_buffer[rx_length] = '\0';
580			DEBUG_INFO2("Firmware: %s", rx_buffer);
581			}
582
583	rousseau	414	return STATUS_SUCCESS;
584	rousseau	649	} /* OpenSerialByName */
585	rousseau	414
586
587			/*****************************************************************************
588			*
589			* CloseSerial: close the port
590			*
591			*****************************************************************************/
592	rousseau	1043	status_t CloseSerial(unsigned int lun)
593	rousseau	414	{
594	rousseau	1049	unsigned int reader = LunToReaderIndex(lun);
595	rousseau	414
596			close(serialDevice[reader].fd);
597			serialDevice[reader].fd = -1;
598
599	rousseau	649	free(serialDevice[reader].device);
600			serialDevice[reader].device = NULL;
601
602	rousseau	414	return STATUS_SUCCESS;
603			} /* CloseSerial */
604
605
606			/*****************************************************************************
607			*
608			* get_ccid_descriptor
609			*
610			****************************************************************************/
611	rousseau	1043	_ccid_descriptor *get_ccid_descriptor(unsigned int lun)
612	rousseau	414	{
613			return &serialDevice[LunToReaderIndex(lun)].ccid;
614			} /* get_ccid_descriptor */
615
616
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision