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proxmark3/client/cmdlfhitag.c
Philippe Teuwen 9b3cc10e0b fix Coverity string overflow
2019-03-15 00:27:26 +01:00

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//-----------------------------------------------------------------------------
// Copyright (C) 2012 Roel Verdult
//
// 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.
//-----------------------------------------------------------------------------
// Low frequency Hitag support
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "proxmark3.h"
#include "ui.h"
#include "cmdparser.h"
#include "common.h"
#include "util.h"
#include "parity.h"
#include "hitag.h"
#include "util_posix.h"
#include "comms.h"
#include "cmddata.h"
#include "loclass/fileutils.h" // savefile
static int CmdHelp(const char *Cmd);
size_t nbytes(size_t nbits) {
return (nbits / 8) + ((nbits % 8) > 0);
}
int usage_hitag_sniff(void) {
PrintAndLogEx(NORMAL, "Sniff traffic between Hitag reader and tag. Use " _YELLOW_("`lf hitag list`")" to view collected data.");
PrintAndLogEx(NORMAL, "Usage: lf hitag sniff [h] ");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
// PrintAndLogEx(NORMAL, " p <pwd> Password");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf hitag sniff");
return 0;
}
int usage_hitag_sim(void) {
PrintAndLogEx(NORMAL, "Simulate " _YELLOW_("Hitag2 / HitagS")" transponder");
PrintAndLogEx(NORMAL, "Usage: lf hitag sim [h] [2|s] e|j|b <filename w/o extension>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " [2|s] 2 = hitag2, s = hitagS");
PrintAndLogEx(NORMAL, " e <filename> Load data from EML file");
PrintAndLogEx(NORMAL, " j <filename> Load data from JSON file");
PrintAndLogEx(NORMAL, " b <filename> Load data from BIN file");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf hitag sim 2 b lf-hitag-dump");
return 0;
}
int usage_hitag_info(void) {
PrintAndLogEx(NORMAL, "Usage: lf hitag info [h] p <pwd>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " p <pwd> password");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf hitag info");
return 0;
}
int usage_hitag_dump(void) {
PrintAndLogEx(NORMAL, "Usage: lf hitag dump [h] p <pwd> f <name>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
// PrintAndLogEx(NORMAL, " p <pwd> password");
// PrintAndLogEx(NORMAL, " f <name> data filename, if no <name> given, UID will be used as filename");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf hitag dump f mydump");
PrintAndLogEx(NORMAL, " lf hitag dump p 4D494B52 f mydump");
return 0;
}
int usage_hitag_reader(void) {
PrintAndLogEx(NORMAL, "Hitag reader functions");
PrintAndLogEx(NORMAL, "Usage: lf hitag reader [h] <reader function #>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " HitagS (0*)");
PrintAndLogEx(NORMAL, " 01 <nr> <ar> Challenge, read all pages from a Hitag S tag");
PrintAndLogEx(NORMAL, " 02 <key> Set to 0 if no authentication is needed. Read all pages from a Hitag S tag");
PrintAndLogEx(NORMAL, " Hitag1 (1*)");
PrintAndLogEx(NORMAL, " Hitag2 (2*)");
PrintAndLogEx(NORMAL, " 21 <password> Password mode");
PrintAndLogEx(NORMAL, " 22 <nr> <ar> Authentication");
PrintAndLogEx(NORMAL, " 23 <key> Authentication, key is in format: ISK high + ISK low");
PrintAndLogEx(NORMAL, " 25 Test recorded authentications");
PrintAndLogEx(NORMAL, " 26 Just read UID");
return 0;
}
int usage_hitag_writer(void) {
PrintAndLogEx(NORMAL, "Hitag writer functions");
PrintAndLogEx(NORMAL, "Usage: lf hitag write [h] <reader function #>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " HitagS (0*)");
PrintAndLogEx(NORMAL, " 03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
PrintAndLogEx(NORMAL, " 04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
PrintAndLogEx(NORMAL, " Hitag1 (1*)");
PrintAndLogEx(NORMAL, " Hitag2 (2*)");
PrintAndLogEx(NORMAL, " 24 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag2 tag");
return 0;
}
int usage_hitag_checkchallenges(void) {
PrintAndLogEx(NORMAL, "Check challenges, load a file with save hitag crypto challenges and test them all.");
PrintAndLogEx(NORMAL, "The file should be 8 * 60 bytes long, the file extension defaults to " _YELLOW_("`.cc`"));
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Usage: lf hitag cc [h] f <filename w/o extension>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " f <filename> Load data from BIN file");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf hitag cc f lf-hitag-challenges");
return 0;
}
int CmdLFHitagList(const char *Cmd) {
CmdTraceList("hitag");
return 0;
/*
uint8_t *got = calloc(USB_CMD_DATA_SIZE, sizeof(uint8_t));
if (!got) {
PrintAndLogEx(WARNING, "Cannot allocate memory for trace");
return 2;
}
// Query for the actual size of the trace
UsbCommand response;
if (!GetFromDevice(BIG_BUF, got, USB_CMD_DATA_SIZE, 0, &response, 2500, false)) {
PrintAndLogEx(WARNING, "command execution time out");
free(got);
return 2;
}
uint16_t traceLen = response.arg[2];
if (traceLen > USB_CMD_DATA_SIZE) {
uint8_t *p = realloc(got, traceLen);
if (p == NULL) {
PrintAndLogEx(WARNING, "Cannot allocate memory for trace");
free(got);
return 2;
}
got = p;
if (!GetFromDevice(BIG_BUF, got, traceLen, 0, NULL, 2500, false)) {
PrintAndLogEx(WARNING, "command execution time out");
free(got);
return 2;
}
}
PrintAndLogEx(NORMAL, "recorded activity (TraceLen = %d bytes):");
PrintAndLogEx(NORMAL, " ETU :nbits: who bytes");
PrintAndLogEx(NORMAL, "---------+-----+----+-----------");
int i = 0;
int prev = -1;
int len = strlen(Cmd);
char filename[FILE_PATH_SIZE] = { 0x00 };
FILE *f = NULL;
if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
memcpy(filename, Cmd, len);
if (strlen(filename) > 0) {
f = fopen(filename, "wb");
if (!f) {
PrintAndLogEx(WARNING, "Error: Could not open file [%s]", filename);
return 1;
}
}
for (;;) {
if (i >= traceLen) { break; }
bool isResponse;
int timestamp = *((uint32_t *)(got + i));
if (timestamp & 0x80000000) {
timestamp &= 0x7fffffff;
isResponse = 1;
} else {
isResponse = 0;
}
int parityBits = *((uint32_t *)(got + i + 4));
// 4 bytes of additional information...
// maximum of 32 additional parity bit information
//
// TODO:
// at each quarter bit period we can send power level (16 levels)
// or each half bit period in 256 levels.
int bits = got[i + 8];
int len = nbytes(got[i + 8]);
if (len > 100) {
break;
}
if (i + len > traceLen) { break;}
uint8_t *frame = (got + i + 9);
// Break and stick with current result if buffer was not completely full
if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
char line[1000] = "";
int j;
for (j = 0; j < len; j++) {
//if((parityBits >> (len - j - 1)) & 0x01) {
if (isResponse && (oddparity8(frame[j]) != ((parityBits >> (len - j - 1)) & 0x01))) {
sprintf(line + (j * 4), "%02x! ", frame[j]);
} else {
sprintf(line + (j * 4), "%02x ", frame[j]);
}
}
PrintAndLogEx(NORMAL, " +%7d: %3d: %s %s",
(prev < 0 ? 0 : (timestamp - prev)),
bits,
(isResponse ? "TAG" : " "),
line);
if (f) {
fprintf(f, " +%7d: %3d: %s %s\n",
(prev < 0 ? 0 : (timestamp - prev)),
bits,
(isResponse ? "TAG" : " "),
line);
}
prev = timestamp;
i += (len + 9);
}
if (f) {
fclose(f);
PrintAndLogEx(NORMAL, "Recorded activity succesfully written to file: %s", filename);
}
free(got);
return 0;
*/
}
int CmdLFHitagSniff(const char *Cmd) {
char ctmp = tolower(param_getchar(Cmd, 0));
if (ctmp == 'h') return usage_hitag_sniff();
UsbCommand c = {CMD_SNIFF_HITAG, {0, 0, 0}};
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLFHitagSim(const char *Cmd) {
bool errors = false;
bool tag_mem_supplied = false;
uint8_t cmdp = 0;
size_t maxdatalen = 48;
uint8_t *data = calloc(4 * 64, sizeof(uint8_t));
size_t datalen = 0;
int res = 0;
char filename[FILE_PATH_SIZE] = { 0x00 };
UsbCommand c = {CMD_SIMULATE_HITAG, {0, 0, 0}};
while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
switch (tolower(param_getchar(Cmd, cmdp))) {
case 'h':
free(data);
return usage_hitag_sim();
case '2':
maxdatalen = 48;
cmdp++;
break;
case 's':
c.cmd = CMD_SIMULATE_HITAG_S;
maxdatalen = 4 * 64;
cmdp++;
break;
case 'e':
param_getstr(Cmd, cmdp + 1, filename, sizeof(filename));
res = loadFileEML(filename, "eml", data, &datalen);
if (res > 0 || datalen != maxdatalen) {
PrintAndLogDevice(FAILED, "error, bytes read mismatch file size");
errors = true;
break;
}
tag_mem_supplied = true;
cmdp += 2;
break;
case 'j':
param_getstr(Cmd, cmdp + 1, filename, sizeof(filename));
res = loadFileJSON(filename, "json", data, maxdatalen, &datalen);
if (res > 0) {
errors = true;
break;
}
tag_mem_supplied = true;
cmdp += 2;
break;
case 'b':
param_getstr(Cmd, cmdp + 1, filename, sizeof(filename));
res = loadFile(filename, "bin", data, maxdatalen, &datalen);
if (res > 0) {
errors = true;
break;
}
tag_mem_supplied = true;
cmdp += 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
}
//Validations
if (errors || cmdp == 0) {
free(data);
return usage_hitag_sim();
}
c.arg[0] = (uint32_t)tag_mem_supplied;
if (tag_mem_supplied) {
memcpy(c.d.asBytes, data, datalen);
}
clearCommandBuffer();
SendCommand(&c);
free(data);
return 0;
}
static void printHitagConfiguration(uint8_t config) {
char msg[100];
memset(msg, 0, sizeof(msg));
// encoding
if (config & 0x1) {
strcat(msg, "Biphase encoding");
} else {
strcat(msg, "Manchester encoding");
}
PrintAndLogEx(SUCCESS, "%s", msg);
memset(msg, 0, sizeof(msg));
// version
strcat(msg, "Coding in HITAG 2 operation: %s");
uint8_t foo = (config & 0x6) >> 1;
switch (foo) {
case 0:
PrintAndLogEx(SUCCESS, "Version: public mode B, Coding: biphase");
PrintAndLogEx(SUCCESS, msg, (config & 0x1) ? "biphase" : "manchester");
break;
case 1:
PrintAndLogEx(SUCCESS, "Version: public mode A, Coding: manchester");
PrintAndLogEx(SUCCESS, msg, (config & 0x1) ? "biphase" : "manchester");
break;
case 2:
PrintAndLogEx(SUCCESS, "Version: public mode C, Coding: biphase");
PrintAndLogEx(SUCCESS, msg, (config & 0x1) ? "biphase" : "manchester");
break;
case 3:
PrintAndLogEx(SUCCESS, "Version: Hitag2");
PrintAndLogEx(SUCCESS, msg, (config & 0x1) ? "biphase" : "manchester");
break;
}
memset(msg, 0, sizeof(msg));
// mode
if (config & 0x8) {
strcat(msg, "Tag is in : " _YELLOW_("Crypto mode"));
} else {
strcat(msg, "Tag is in : " _YELLOW_("Password mode"));
}
PrintAndLogEx(SUCCESS, "%s", msg);
memset(msg, 0, sizeof(msg));
// page access
if (config & 0x10) {
strcat(msg, "Page 6,7 : read only");
} else {
strcat(msg, "Page 6,7 : " _GREEN_("read write"));
}
PrintAndLogEx(SUCCESS, "%s", msg);
memset(msg, 0, sizeof(msg));
// page access
if (config & 0x20) {
strcat(msg, "Page 4,5 : read only");
} else {
strcat(msg, "Page 4,5 : " _GREEN_("read write"));
}
PrintAndLogEx(SUCCESS, "%s", msg);
memset(msg, 0, sizeof(msg));
// OTP
if (config & 0x40) {
strcat(msg, "Page 3 : read only. Configuration byte and password tag " _RED_("FIXED / IRREVERSIBLE"));
} else {
strcat(msg, "Page 3 : " _GREEN_("read write"));
}
PrintAndLogEx(SUCCESS, "%s", msg);
memset(msg, 0, sizeof(msg));
// OTP
if (config & 0x80) {
strcat(msg, "Page 1 " _RED_("locked") "\n");
if (config & 0x8) {
strcat(msg + strlen(msg), "Page 2 : " _RED_("locked"));
} else {
strcat(msg + strlen(msg), "Page 2 : read only");
}
} else {
strcat(msg, "Page 1,2 : " _GREEN_("read write"));
}
PrintAndLogEx(SUCCESS, "%s", msg);
PrintAndLogEx(INFO, "------------------------------------");
}
int CmdLFHitagInfo(const char *Cmd) {
PrintAndLogEx(INFO, "Hitag2 tag information ");
PrintAndLogEx(INFO, "To be done!");
PrintAndLogEx(INFO, "------------------------------------");
char ctmp = tolower(param_getchar(Cmd, 0));
if (ctmp == 'h') return usage_hitag_info();
// read block3, get configuration byte.
// common configurations.
printHitagConfiguration(0x06);
//printHitagConfiguration( 0x0E );
//printHitagConfiguration( 0x02 );
//printHitagConfiguration( 0x00 );
//printHitagConfiguration( 0x04 );
return 0;
}
int CmdLFHitagReader(const char *Cmd) {
UsbCommand c = {CMD_READER_HITAG, {0, 0, 0} };
hitag_data *htd = (hitag_data *)c.d.asBytes;
hitag_function htf = param_get32ex(Cmd, 0, 0, 10);
switch (htf) {
case RHTSF_CHALLENGE: {
c.cmd = CMD_READ_HITAG_S;
num_to_bytes(param_get32ex(Cmd, 1, 0, 16), 4, htd->auth.NrAr);
num_to_bytes(param_get32ex(Cmd, 2, 0, 16), 4, htd->auth.NrAr + 4);
break;
}
case RHTSF_KEY: {
c.cmd = CMD_READ_HITAG_S;
num_to_bytes(param_get64ex(Cmd, 1, 0, 16), 6, htd->crypto.key);
break;
}
case RHT2F_PASSWORD: {
num_to_bytes(param_get32ex(Cmd, 1, 0, 16), 4, htd->pwd.password);
break;
}
case RHT2F_AUTHENTICATE: {
num_to_bytes(param_get32ex(Cmd, 1, 0, 16), 4, htd->auth.NrAr);
num_to_bytes(param_get32ex(Cmd, 2, 0, 16), 4, htd->auth.NrAr + 4);
break;
}
case RHT2F_CRYPTO: {
num_to_bytes(param_get64ex(Cmd, 1, 0, 16), 6, htd->crypto.key);
break;
}
case RHT2F_TEST_AUTH_ATTEMPTS: {
// No additional parameters needed
break;
}
case RHT2F_UID_ONLY: {
// No additional parameters needed
break;
}
default: {
return usage_hitag_reader();
}
}
c.arg[0] = htf;
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
PrintAndLogEx(WARNING, "timeout while waiting for reply.");
return 1;
}
if (resp.arg[0] == false) {
PrintAndLogEx(DEBUG, "DEBUG: Error - hitag failed");
return 1;
}
uint32_t id = bytes_to_num(resp.d.asBytes, 4);
if (htf == RHT2F_UID_ONLY) {
PrintAndLogEx(SUCCESS, "Valid Hitag2 tag found - UID: %08x", id);
} else {
uint8_t *data = resp.d.asBytes;
char filename[FILE_PATH_SIZE];
char *fnameptr = filename;
fnameptr += sprintf(fnameptr, "lf-hitag-");
FillFileNameByUID(fnameptr, data, "-dump", 4);
saveFile(filename, "bin", data, 48);
saveFileEML(filename, "eml", data, 48, 4);
saveFileJSON(filename, "json", jsfHitag, (uint8_t *)data, 48);
}
return 0;
}
int CmdLFHitagCheckChallenges(const char *Cmd) {
UsbCommand c = { CMD_TEST_HITAGS_TRACES, {0, 0, 0}};
char filename[FILE_PATH_SIZE] = { 0x00 };
size_t datalen = 0;
int res = 0;
bool file_given = false;
bool errors = false;
uint8_t cmdp = 0;
uint8_t *data = calloc(8 * 60, sizeof(uint8_t));
while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
switch (tolower(param_getchar(Cmd, cmdp))) {
case 'h':
free(data);
return usage_hitag_checkchallenges();
case 'f':
param_getstr(Cmd, cmdp + 1, filename, sizeof(filename));
res = loadFile(filename, "cc", data, 8 * 60, &datalen);
if (res > 0) {
errors = true;
break;
}
memcpy(c.d.asBytes, data, datalen);
file_given = true;
cmdp += 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
}
//Validations
if (errors) {
free(data);
return usage_hitag_checkchallenges();
}
//file with all the challenges to try
c.arg[0] = (uint32_t)file_given;
clearCommandBuffer();
SendCommand(&c);
free(data);
return 0;
}
int CmdLFHitagWriter(const char *Cmd) {
UsbCommand c = { CMD_WR_HITAG_S, {0, 0, 0}};
hitag_data *htd = (hitag_data *)c.d.asBytes;
hitag_function htf = param_get32ex(Cmd, 0, 0, 10);
switch (htf) {
case WHTSF_CHALLENGE: {
num_to_bytes(param_get64ex(Cmd, 1, 0, 16), 8, htd->auth.NrAr);
c.arg[2] = param_get32ex(Cmd, 2, 0, 10);
num_to_bytes(param_get32ex(Cmd, 3, 0, 16), 4, htd->auth.data);
break;
}
case WHTSF_KEY:
case WHT2F_CRYPTO: {
num_to_bytes(param_get64ex(Cmd, 1, 0, 16), 6, htd->crypto.key);
c.arg[2] = param_get32ex(Cmd, 2, 0, 10);
num_to_bytes(param_get32ex(Cmd, 3, 0, 16), 4, htd->crypto.data);
break;
}
default: {
return usage_hitag_writer();
}
}
c.arg[0] = htf;
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
PrintAndLogEx(WARNING, "timeout while waiting for reply.");
return 1;
}
if (resp.arg[0] == false) {
PrintAndLogEx(DEBUG, "DEBUG: Error - hitag write failed");
return 1;
}
return 0;
}
int CmdLFHitagDump(const char *Cmd) {
PrintAndLogEx(INFO, "Dumping of tag memory");
PrintAndLogEx(INFO, "To be done!");
char ctmp = tolower(param_getchar(Cmd, 0));
if (ctmp == 'h') return usage_hitag_dump();
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help" },
{"list", CmdLFHitagList, 0, "List Hitag trace history" },
{"info", CmdLFHitagInfo, 1, "Tag information" },
{"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader" },
{"sim", CmdLFHitagSim, 1, "Simulate Hitag transponder" },
{"sniff", CmdLFHitagSniff, 1, "Eavesdrop Hitag communication" },
{"writer", CmdLFHitagWriter, 1, "Act like a Hitag Writer" },
{"cc", CmdLFHitagCheckChallenges, 1, "Test all challenges" },
{ NULL, NULL, 0, NULL }
};
int CmdLFHitag(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
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