Proxmark/proxmark3
1
1
Fork 0
mirror of https://github.com/Proxmark/proxmark3.git synced 2024-11-11 09:59:45 +08:00
Code Issues Projects Releases Packages Wiki Activity
proxmark3/client/cmdhf14b.c
pwpiwi 51d4f6f114 fixing iso14443b (issue #103): 
- fix: IQ demodulator (FPGA)
- fix: approximately align reader signal delay to tag response delay (FPGA)
- fix: remove deprecated RSSI calculation to improve decoder speed (iso14443b.c)
- fix: better approximation of signal amplitude to avoid false carrier detection (iso14443b.c)
- fix: remove initial power off in iso14443b raw command (iso14443b.c)
- add: enable tracing for iso14443b raw command (iso14443b.c)
- fix: client crashed when checking CRC for incomplete responses (iso14433b.c)
- speeding up snoop to avoid circular buffer overflow
- added some comments for better documentation
- rename functions (iso14443 -> iso14443b)
- remove unused code in hi_read_rx_xcorr.v
2015-06-17 20:27:36 +02:00

413 lines
11 KiB
C
Raw Blame History

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency ISO14443B commands
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <stdint.h>
#include "iso14443crc.h"
#include "proxmark3.h"
#include "data.h"
#include "graph.h"
#include "util.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdhf14b.h"
#include "cmdmain.h"
static int CmdHelp(const char *Cmd);
int CmdHF14BDemod(const char *Cmd)
{
int i, j, iold;
int isum, qsum;
int outOfWeakAt;
bool negateI, negateQ;
uint8_t data[256];
int dataLen = 0;
// As received, the samples are pairs, correlations against I and Q
// square waves. So estimate angle of initial carrier (or just
// quadrant, actually), and then do the demod.
// First, estimate where the tag starts modulating.
for (i = 0; i < GraphTraceLen; i += 2) {
if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
break;
}
}
if (i >= GraphTraceLen) {
PrintAndLog("too weak to sync");
return 0;
}
PrintAndLog("out of weak at %d", i);
outOfWeakAt = i;
// Now, estimate the phase in the initial modulation of the tag
isum = 0;
qsum = 0;
for (; i < (outOfWeakAt + 16); i += 2) {
isum += GraphBuffer[i + 0];
qsum += GraphBuffer[i + 1];
}
negateI = (isum < 0);
negateQ = (qsum < 0);
// Turn the correlation pairs into soft decisions on the bit.
j = 0;
for (i = 0; i < GraphTraceLen / 2; i++) {
int si = GraphBuffer[j];
int sq = GraphBuffer[j + 1];
if (negateI) si = -si;
if (negateQ) sq = -sq;
GraphBuffer[i] = si + sq;
j += 2;
}
GraphTraceLen = i;
i = outOfWeakAt / 2;
while (GraphBuffer[i] > 0 && i < GraphTraceLen)
i++;
if (i >= GraphTraceLen) goto demodError;
iold = i;
while (GraphBuffer[i] < 0 && i < GraphTraceLen)
i++;
if (i >= GraphTraceLen) goto demodError;
if ((i - iold) > 23) goto demodError;
PrintAndLog("make it to demod loop");
for (;;) {
iold = i;
while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
i++;
if (i >= GraphTraceLen) goto demodError;
if ((i - iold) > 6) goto demodError;
uint16_t shiftReg = 0;
if (i + 20 >= GraphTraceLen) goto demodError;
for (j = 0; j < 10; j++) {
int soft = GraphBuffer[i] + GraphBuffer[i + 1];
if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
PrintAndLog("weak bit");
}
shiftReg >>= 1;
if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
shiftReg |= 0x200;
}
i+= 2;
}
if ((shiftReg & 0x200) && !(shiftReg & 0x001))
{
// valid data byte, start and stop bits okay
PrintAndLog(" %02x", (shiftReg >> 1) & 0xff);
data[dataLen++] = (shiftReg >> 1) & 0xff;
if (dataLen >= sizeof(data)) {
return 0;
}
} else if (shiftReg == 0x000) {
// this is EOF
break;
} else {
goto demodError;
}
}
uint8_t first, second;
ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
(first == data[dataLen-2] && second == data[dataLen-1]) ?
"ok" : "****FAIL****");
RepaintGraphWindow();
return 0;
demodError:
PrintAndLog("demod error");
RepaintGraphWindow();
return 0;
}
int CmdHF14BList(const char *Cmd)
{
PrintAndLog("Deprecated command, use 'hf list 14b' instead");
return 0;
}
int CmdHF14BRead(const char *Cmd)
{
UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
SendCommand(&c);
return 0;
}
int CmdHF14Sim(const char *Cmd)
{
UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
SendCommand(&c);
return 0;
}
int CmdHFSimlisten(const char *Cmd)
{
UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
SendCommand(&c);
return 0;
}
int CmdHF14BSnoop(const char *Cmd)
{
UsbCommand c = {CMD_SNOOP_ISO_14443};
SendCommand(&c);
return 0;
}
/* New command to read the contents of a SRI512 tag
* SRI512 tags are ISO14443-B modulated memory tags,
* this command just dumps the contents of the memory
*/
int CmdSri512Read(const char *Cmd)
{
UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
SendCommand(&c);
return 0;
}
/* New command to read the contents of a SRIX4K tag
* SRIX4K tags are ISO14443-B modulated memory tags,
* this command just dumps the contents of the memory/
*/
int CmdSrix4kRead(const char *Cmd)
{
UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
SendCommand(&c);
return 0;
}
int CmdHF14BCmdRaw (const char *cmd) {
UsbCommand resp;
uint8_t *recv;
UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
uint8_t reply=1;
uint8_t crc=0;
uint8_t power=0;
char buf[5]="";
int i=0;
uint8_t data[100] = {0x00};
unsigned int datalen=0, temp;
char *hexout;
if (strlen(cmd)<3) {
PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
PrintAndLog(" -r do not read response");
PrintAndLog(" -c calculate and append CRC");
PrintAndLog(" -p leave the field on after receive");
return 0;
}
// strip
while (*cmd==' ' || *cmd=='\t') cmd++;
while (cmd[i]!='\0') {
if (cmd[i]==' ' || cmd[i]=='\t') { i++; continue; }
if (cmd[i]=='-') {
switch (cmd[i+1]) {
case 'r':
case 'R':
reply=0;
break;
case 'c':
case 'C':
crc=1;
break;
case 'p':
case 'P':
power=1;
break;
default:
PrintAndLog("Invalid option");
return 0;
}
i+=2;
continue;
}
if ((cmd[i]>='0' && cmd[i]<='9') ||
(cmd[i]>='a' && cmd[i]<='f') ||
(cmd[i]>='A' && cmd[i]<='F') ) {
buf[strlen(buf)+1]=0;
buf[strlen(buf)]=cmd[i];
i++;
if (strlen(buf)>=2) {
sscanf(buf,"%x",&temp);
data[datalen]=(uint8_t)(temp & 0xff);
datalen++;
*buf=0;
}
continue;
}
PrintAndLog("Invalid char on input");
return 1;
}
if (datalen == 0)
{
PrintAndLog("Missing data input");
return 0;
}
if(crc)
{
uint8_t first, second;
ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
data[datalen++] = first;
data[datalen++] = second;
}
c.arg[0] = datalen;
c.arg[1] = reply;
c.arg[2] = power;
memcpy(c.d.asBytes,data,datalen);
SendCommand(&c);
if (reply) {
if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
recv = resp.d.asBytes;
PrintAndLog("received %i octets",resp.arg[0]);
if(resp.arg[0] == 0)
return 0;
hexout = (char *)malloc(resp.arg[0] * 3 + 1);
if (hexout != NULL) {
uint8_t first, second;
for (int i = 0; i < resp.arg[0]; i++) { // data in hex
sprintf(&hexout[i * 3], "%02X ", recv[i]);
}
PrintAndLog("%s", hexout);
free(hexout);
if (resp.arg[0] > 2) {
ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
PrintAndLog("CRC OK");
} else {
PrintAndLog("CRC failed");
}
}
} else {
PrintAndLog("malloc failed your client has low memory?");
}
} else {
PrintAndLog("timeout while waiting for reply.");
}
} // if reply
return 0;
}
int CmdHF14BWrite( const char *Cmd){
/*
* For SRIX4K blocks 00 - 7F
* hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
*
* For SR512 blocks 00 - 0F
* hf 14b raw -c -p 09 $sr512wblock $sr512wdata
*
* Special block FF = otp_lock_reg block.
* Data len 4 bytes-
*/
char cmdp = param_getchar(Cmd, 0);
uint8_t blockno = -1;
uint8_t data[4] = {0x00};
bool isSrix4k = true;
char str[20];
if (strlen(Cmd) < 1 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: hf 14b write <1|2> <BLOCK> <DATA>");
PrintAndLog(" [1 = SRIX4K]");
PrintAndLog(" [2 = SRI512]");
PrintAndLog(" [BLOCK number depends on tag, special block == FF]");
PrintAndLog(" sample: hf 14b write 1 7F 11223344");
PrintAndLog(" : hf 14b write 1 FF 11223344");
PrintAndLog(" : hf 14b write 2 15 11223344");
PrintAndLog(" : hf 14b write 2 FF 11223344");
return 0;
}
if ( cmdp == '2' )
isSrix4k = false;
//blockno = param_get8(Cmd, 1);
if ( param_gethex(Cmd,1, &blockno, 2) ) {
PrintAndLog("Block number must include 2 HEX symbols");
return 0;
}
if ( isSrix4k ){
if ( blockno > 0x7f && blockno != 0xff ){
PrintAndLog("Block number out of range");
return 0;
}
} else {
if ( blockno > 0x0f && blockno != 0xff ){
PrintAndLog("Block number out of range");
return 0;
}
}
if (param_gethex(Cmd, 2, data, 8)) {
PrintAndLog("Data must include 8 HEX symbols");
return 0;
}
if ( blockno == 0xff)
PrintAndLog("[%s] Write special block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512" , blockno, sprint_hex(data,4) );
else
PrintAndLog("[%s] Write block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512", blockno, sprint_hex(data,4) );
sprintf(str, "-c 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
CmdHF14BCmdRaw(str);
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"},
{"list", CmdHF14BList, 0, "[Deprecated] List ISO 14443b history"},
{"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"},
{"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"},
{"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"},
{"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"},
{"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
{"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
{"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
{"write", CmdHF14BWrite, 0, "Write data to a SRI512 | SRIX4K tag"},
{NULL, NULL, 0, NULL}
};
int CmdHF14B(const char *Cmd)
{
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd)
{
CmdsHelp(CommandTable);
return 0;
}
Reference in a new issue View git blame Copy permalink