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command to change fidi send by host

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This commit is contained in:
Christina Quast
2015-05-03 14:21:26 +02:00
parent 6246000b3a
commit cb646bc729
5 changed files with 79 additions and 252 deletions
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26
firmware/src_simtrace/host_communication.c
View File

@@ -1,14 +1,14 @@
#include "board.h"
static volatile bool write_to_host_in_progress = false;
static struct iso7816_3_handle ih = {0};
static bool check_for_pts = false;
static enum pts_state state;
static struct Usart_info usart_info = {.base = USART_PHONE, .id = ID_USART_PHONE, .state = USART_RCV};
void USB_write_callback(uint8_t *pArg, uint8_t status, uint32_t transferred, uint32_t remaining)
{
if (status != USBD_STATUS_SUCCESS) {
TRACE_ERROR("USB err status: %d (%s)\n", __FUNCTION__, status);
TRACE_ERROR("USB err status: %d(%s)\n", __FUNCTION__, status);
}
write_to_host_in_progress = false;
TRACE_DEBUG("WR_CB\n");
@@ -40,26 +40,6 @@ int check_data_from_phone()
if((rbuf_is_empty(&sim_rcv_buf) || write_to_host_in_progress == true)) {
return ret;
}
if ((check_for_pts == false) && (rbuf_peek(&sim_rcv_buf) == 0xff)) {
// FIXME: set var to false
check_for_pts = true;
ih = (struct iso7816_3_handle){0};
}
if (check_for_pts == true) {
while (!rbuf_is_empty(&sim_rcv_buf) && (ih.pts_state != PTS_END)) {
state = process_byte_pts(&ih, rbuf_read(&sim_rcv_buf));
}
if (ih.pts_bytes_processed > 6 && ih.pts_state != PTS_END) {
int i;
for (i = 0; i < ih.pts_bytes_processed; i++)
printf("s: %x", ih.pts_req[i]);
check_for_pts = false;
rbuf_write(&sim_rcv_buf, ih.pts_req[i]);
} else {
printf("fin pts\n", ih.pts_state);
check_for_pts = false;
}
}
ret = send_to_host();
return ret;
}

199
firmware/src_simtrace/iso7816_uart.c
View File

@@ -1,199 +0,0 @@
/* Driver for AT91SAM7 USART0 in ISO7816-3 mode for passive sniffing
* (C) 2010 by Harald Welte <hwelte@hmw-consulting.de>
*
* 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
*
*/
#include "board.h"
#include "errno.h"
#define _PTSS 0
#define _PTS0 1
#define _PTS1 2
#define _PTS2 3
#define _PTS3 4
#define _PCK 5
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
static struct Usart_info usart_info = {.base = USART_PHONE, .id = ID_USART_PHONE, .state = USART_RCV};
/* Table 6 from ISO 7816-3 */
static const uint16_t fi_table[] = {
0, 372, 558, 744, 1116, 1488, 1860, 0,
0, 512, 768, 1024, 1536, 2048, 0, 0
};
/* Table 7 from ISO 7816-3 */
static const uint8_t di_table[] = {
0, 1, 2, 4, 8, 16, 0, 0,
0, 0, 2, 4, 8, 16, 32, 64,
};
/* compute the F/D ratio based on Fi and Di values */
static int compute_fidi_ratio(uint8_t fi, uint8_t di)
{
uint16_t f, d;
int ret;
if (fi >= ARRAY_SIZE(fi_table) ||
di >= ARRAY_SIZE(di_table))
return -EINVAL;
f = fi_table[fi];
if (f == 0)
return -EINVAL;
d = di_table[di];
if (d == 0)
return -EINVAL;
if (di < 8)
ret = f / d;
else
ret = f * d;
return ret;
}
static void update_fidi(struct iso7816_3_handle *ih)
{
int rc;
rc = compute_fidi_ratio(ih->fi, ih->di);
if (rc > 0 && rc < 0x400) {
TRACE_INFO("computed Fi(%u) Di(%u) ratio: %d", ih->fi, ih->di, rc);
/* make sure UART uses new F/D ratio */
USART_PHONE->US_CR |= US_CR_RXDIS | US_CR_RSTRX;
USART_PHONE->US_FIDI = rc & 0x3ff;
USART_PHONE->US_CR |= US_CR_RXEN | US_CR_STTTO;
} else
TRACE_INFO("computed FiDi ratio %d unsupported", rc);
}
/* Update the ATR sub-state */
static void set_pts_state(struct iso7816_3_handle *ih, enum pts_state new_ptss)
{
//DEBUGPCR("PTS state %u -> %u", ih->pts_state, new_ptss);
ih->pts_state = new_ptss;
}
/* Determine the next PTS state */
static enum pts_state next_pts_state(struct iso7816_3_handle *ih)
{
uint8_t is_resp = ih->pts_state & 0x10;
uint8_t sstate = ih->pts_state & 0x0f;
uint8_t *pts_ptr;
if (ih->pts_state == PTS_END) {
return PTS_END;
}
if (!is_resp)
pts_ptr = ih->pts_req;
else
pts_ptr = ih->pts_resp;
switch (sstate) {
case PTS_S_WAIT_REQ_PTSS:
goto from_ptss;
case PTS_S_WAIT_REQ_PTS0:
goto from_pts0;
case PTS_S_WAIT_REQ_PTS1:
goto from_pts1;
case PTS_S_WAIT_REQ_PTS2:
goto from_pts2;
case PTS_S_WAIT_REQ_PTS3:
goto from_pts3;
}
if (ih->pts_state == PTS_S_WAIT_REQ_PCK)
return PTS_S_WAIT_RESP_PTSS;
from_ptss:
return PTS_S_WAIT_REQ_PTS0 | is_resp;
from_pts0:
if (pts_ptr[_PTS0] & (1 << 4))
return PTS_S_WAIT_REQ_PTS1 | is_resp;
from_pts1:
if (pts_ptr[_PTS0] & (1 << 5))
return PTS_S_WAIT_REQ_PTS2 | is_resp;
from_pts2:
if (pts_ptr[_PTS0] & (1 << 6))
return PTS_S_WAIT_REQ_PTS3 | is_resp;
from_pts3:
return PTS_S_WAIT_REQ_PCK | is_resp;
}
enum pts_state process_byte_pts(struct iso7816_3_handle *ih, uint8_t byte)
{
printf("PTS: %x, stat: %x\n", byte, ih->pts_state);
switch (ih->pts_state) {
case PTS_S_WAIT_REQ_PTSS:
ih->pts_req[_PTSS] = byte;
break;
case PTS_S_WAIT_REQ_PTS0:
ih->pts_req[_PTS0] = byte;
break;
case PTS_S_WAIT_REQ_PTS1:
ih->pts_req[_PTS1] = byte;
break;
case PTS_S_WAIT_REQ_PTS2:
ih->pts_req[_PTS2] = byte;
break;
case PTS_S_WAIT_REQ_PTS3:
ih->pts_req[_PTS3] = byte;
break;
case PTS_S_WAIT_REQ_PCK:
/* FIXME: check PCK */
ih->pts_req[_PCK] = byte;
break;
case PTS_S_WAIT_RESP_PTSS:
ih->pts_resp[_PTSS] = byte;
break;
case PTS_S_WAIT_RESP_PTS0:
ih->pts_resp[_PTS0] = byte;
break;
case PTS_S_WAIT_RESP_PTS1:
/* This must be TA1 */
ih->fi = byte >> 4;
ih->di = byte & 0xf;
TRACE_DEBUG("found Fi=%u Di=%u", ih->fi, ih->di);
ih->pts_resp[_PTS1] = byte;
break;
case PTS_S_WAIT_RESP_PTS2:
ih->pts_resp[_PTS2] = byte;
break;
case PTS_S_WAIT_RESP_PTS3:
ih->pts_resp[_PTS3] = byte;
break;
case PTS_S_WAIT_RESP_PCK:
ih->pts_resp[_PCK] = byte;
/* FIXME: check PCK */
for (int i = 0; ih->pts_resp != 0; i++)
ISO7816_SendChar(ih->pts_req[i], &usart_info);
/* update baud rate generator with Fi/Di */
update_fidi(ih);
//set_pts_state(ih, PTS_S_WAIT_REQ_PTSS);
/* Wait for the next APDU */
ih->pts_state = PTS_END;
case PTS_END:
TRACE_INFO("PTS state PTS_END reached");
}
/* calculate the next state and set it */
set_pts_state(ih, next_pts_state(ih));
printf("stat: %x\n", ih->pts_state);
return ih->pts_state;
}

16
firmware/src_simtrace/phone.c
View File

@@ -122,6 +122,7 @@ static struct Usart_info usart_info = {.base = USART_PHONE, .id = ID_USART_PHONE
* Internal variables
*-----------------------------------------------------------------------------*/
static uint8_t host_to_sim_buf[BUFLEN];
static bool change_fidi = false;
void receive_from_host( void );
void sendResponse_to_phone( uint8_t *pArg, uint8_t status, uint32_t transferred, uint32_t remaining)
@@ -135,12 +136,25 @@ void sendResponse_to_phone( uint8_t *pArg, uint8_t status, uint32_t transferred,
USART_SetReceiverEnabled(USART_PHONE, 0);
USART_SetTransmitterEnabled(USART_PHONE, 1);
for (uint32_t i = 0; i < transferred; i++ ) {
uint32_t i = 0;
if (host_to_sim_buf[0] == 0xff) {
printf("Change FIDI detected\n");
// PTS command, change FIDI after command
i = 2;
change_fidi = true;
}
for (; i < transferred; i++ ) {
ISO7816_SendChar(host_to_sim_buf[i], &usart_info);
}
USART_SetTransmitterEnabled(USART_PHONE, 0);
USART_SetReceiverEnabled(USART_PHONE, 1);
if (change_fidi == true) {
printf("Change FIDI: %x\n", host_to_sim_buf[2]);
update_fidi(host_to_sim_buf[2]);
change_fidi = false;
}
receive_from_host();
}

30
firmware/src_simtrace/simtrace.h
View File

@@ -58,36 +58,8 @@ typedef struct {
extern const USBConfigurationDescriptor *configurationDescriptorsArr[];
/*** PTS parsing ***/
/* detailed sub-states of ISO7816_S_IN_PTS */
enum pts_state {
PTS_S_WAIT_REQ_PTSS,
PTS_S_WAIT_REQ_PTS0,
PTS_S_WAIT_REQ_PTS1,
PTS_S_WAIT_REQ_PTS2,
PTS_S_WAIT_REQ_PTS3,
PTS_S_WAIT_REQ_PCK,
PTS_S_WAIT_RESP_PTSS = PTS_S_WAIT_REQ_PTSS | 0x10,
PTS_S_WAIT_RESP_PTS0 = PTS_S_WAIT_REQ_PTS0 | 0x10,
PTS_S_WAIT_RESP_PTS1 = PTS_S_WAIT_REQ_PTS1 | 0x10,
PTS_S_WAIT_RESP_PTS2 = PTS_S_WAIT_REQ_PTS2 | 0x10,
PTS_S_WAIT_RESP_PTS3 = PTS_S_WAIT_REQ_PTS3 | 0x10,
PTS_S_WAIT_RESP_PCK = PTS_S_WAIT_REQ_PCK | 0x10,
PTS_END
};
struct iso7816_3_handle {
uint8_t fi;
uint8_t di;
enum pts_state pts_state;
uint8_t pts_req[6];
uint8_t pts_resp[6];
uint8_t pts_bytes_processed;
};
int check_data_from_phone();
enum pts_state process_byte_pts(struct iso7816_3_handle *ih, uint8_t byte);
void update_fidi(uint8_t fidi);
void ISR_PhoneRST( const Pin *pPin);

60
firmware/src_simtrace/simtrace_iso7816.c
View File

@@ -34,6 +34,7 @@
#include "board.h"
#include <string.h>
#include <errno.h>
volatile uint32_t char_stat;
@@ -110,3 +111,62 @@ void USART1_IrqHandler( void )
char_stat = stat;
}
}
/* FIDI update functions */
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/* Table 6 from ISO 7816-3 */
static const uint16_t fi_table[] = {
0, 372, 558, 744, 1116, 1488, 1860, 0,
0, 512, 768, 1024, 1536, 2048, 0, 0
};
/* Table 7 from ISO 7816-3 */
static const uint8_t di_table[] = {
0, 1, 2, 4, 8, 16, 0, 0,
0, 0, 2, 4, 8, 16, 32, 64,
};
/* compute the F/D ratio based on Fi and Di values */
static int compute_fidi_ratio(uint8_t fi, uint8_t di)
{
uint16_t f, d;
int ret;
if (fi >= ARRAY_SIZE(fi_table) ||
di >= ARRAY_SIZE(di_table))
return -EINVAL;
f = fi_table[fi];
if (f == 0)
return -EINVAL;
d = di_table[di];
if (d == 0)
return -EINVAL;
if (di < 8)
ret = f / d;
else
ret = f * d;
return ret;
}
void update_fidi(uint8_t fidi)
{
int rc;
uint8_t fi = fidi >> 4;
uint8_t di = fidi & 0xf;
rc = compute_fidi_ratio(fi, di);
if (rc > 0 && rc < 0x400) {
TRACE_INFO("computed Fi(%u) Di(%u) ratio: %d", fi, di, rc);
/* make sure UART uses new F/D ratio */
USART_PHONE->US_CR |= US_CR_RXDIS | US_CR_RSTRX;
USART_PHONE->US_FIDI = rc & 0x3ff;
USART_PHONE->US_CR |= US_CR_RXEN | US_CR_STTTO;
} else
TRACE_INFO("computed FiDi ratio %d unsupported", rc);
}