From 1e262141523bcda8b170cc42fb5bd8d6bb8d17f1 Mon Sep 17 00:00:00 2001 From: "dekoninggans@gmail.com" Date: Thu, 28 Jun 2012 13:38:40 +0000 Subject: [PATCH] Extended iClass support with Card and Reader emulation! --- armsrc/appmain.c | 6 + armsrc/apps.h | 14 + armsrc/iclass.c | 747 +++++++++++++++++++++++++++++++++++++++---- armsrc/iso14443a.c | 14 +- client/cmdhficlass.c | 63 ++++ client/cmdhficlass.h | 2 + include/usb_cmd.h | 2 + 7 files changed, 773 insertions(+), 75 deletions(-) diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 4ff1e811..362759a7 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -754,6 +754,12 @@ void UsbPacketReceived(uint8_t *packet, int len) case CMD_SNOOP_ICLASS: SnoopIClass(); break; + case CMD_SIMULATE_TAG_ICLASS: + SimulateIClass(c->arg[0], c->d.asBytes); + break; + case CMD_READER_ICLASS: + ReaderIClass(c->arg[0]); + break; #endif case CMD_SIMULATE_TAG_HF_LISTEN: diff --git a/armsrc/apps.h b/armsrc/apps.h index 5d943841..1dd7134d 100644 --- a/armsrc/apps.h +++ b/armsrc/apps.h @@ -19,6 +19,12 @@ typedef unsigned char byte_t; // The large multi-purpose buffer, typically used to hold A/D samples, // maybe processed in some way. uint32_t BigBuf[8000]; +extern const uint8_t OddByteParity[256]; +extern uint8_t *trace; // = (uint8_t *) BigBuf; +extern int traceLen; // = 0; +extern int rsamples; // = 0; +extern int tracing; // = TRUE; +extern uint8_t trigger; // This may be used (sparingly) to declare a function to be copied to // and executed from RAM @@ -109,6 +115,12 @@ void RAMFUNC SnoopIso14443(void); void RAMFUNC SnoopIso14443a(void); void SimulateIso14443aTag(int tagType, int TagUid); // ## simulate iso14443a tag void ReaderIso14443a(UsbCommand * c, UsbCommand * ack); +// Also used in iclass.c +int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader); +uint32_t GetParity(const uint8_t * pbtCmd, int iLen); +void iso14a_set_trigger(int enable); +void iso14a_clear_tracelen(void); +void iso14a_set_tracing(int enable); // mifarecmd.h void ReaderMifare(uint32_t parameter); @@ -135,6 +147,8 @@ void SetDebugIso15693(uint32_t flag); /// iclass.h void RAMFUNC SnoopIClass(void); +void SimulateIClass(uint8_t arg0, uint8_t *datain); +void ReaderIClass(uint8_t arg0); /// util.h diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 7a0f4030..37006e51 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -2,6 +2,7 @@ // Gerhard de Koning Gans - May 2008 // Hagen Fritsch - June 2010 // Gerhard de Koning Gans - May 2011 +// Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation // // 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 @@ -15,11 +16,6 @@ // Please feel free to contribute and extend iClass support!! //----------------------------------------------------------------------------- // -// TODO: -// ===== -// - iClass emulation -// - reader emulation -// // FIX: // ==== // We still have sometimes a demodulation error when snooping iClass communication. @@ -45,10 +41,12 @@ #include "util.h" #include "string.h" #include "common.h" +// Needed for CRC in emulation mode; +// same construction as in ISO 14443; +// different initial value (CRC_ICLASS) +#include "iso14443crc.h" -static uint8_t *trace = (uint8_t *) BigBuf; -static int traceLen = 0; -static int rsamples = 0; +static int timeout = 4096; // CARD TO READER // Sequence D: 11110000 modulation with subcarrier during first half @@ -58,42 +56,27 @@ static int rsamples = 0; // Sequence X: 00001100 drop after half a period // Sequence Y: 00000000 no drop // Sequence Z: 11000000 drop at start -#define SEC_D 0xf0 -#define SEC_E 0x0f -#define SEC_F 0x00 #define SEC_X 0x0c #define SEC_Y 0x00 #define SEC_Z 0xc0 -static const uint8_t OddByteParity[256] = { - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1 -}; - -//static const uint8_t MajorityNibble[16] = { 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1 }; -//static const uint8_t MajorityNibble[16] = { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; - -// BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT +// SAME AS IN iso14443a. #define RECV_CMD_OFFSET 3032 #define RECV_RES_OFFSET 3096 #define DMA_BUFFER_OFFSET 3160 #define DMA_BUFFER_SIZE 4096 #define TRACE_LENGTH 3000 +uint32_t SwapBits(uint32_t value, int nrbits) { + int i; + uint32_t newvalue = 0; + for(i = 0; i < nrbits; i++) { + newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i); + } + return newvalue; +} + +static int SendIClassAnswer(uint8_t *resp, int respLen, int delay); //----------------------------------------------------------------------------- // The software UART that receives commands from the reader, and its state @@ -113,8 +96,8 @@ static struct { int nOutOfCnt; int OutOfCnt; int syncBit; - int parityBits; - int samples; + int parityBits; + int samples; int highCnt; int swapper; int counter; @@ -123,7 +106,7 @@ static struct { uint8_t *output; } Uart; -static RAMFUNC int MillerDecoding(int bit) +static RAMFUNC int OutOfNDecoding(int bit) { //int error = 0; int bitright; @@ -375,7 +358,7 @@ static RAMFUNC int MillerDecoding(int bit) } //============================================================================= -// ISO 14443 Type A - Manchester +// Manchester //============================================================================= static struct { @@ -433,28 +416,6 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.syncBit = 0; //Demod.samples = 0; Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part - /* if(bit & 0x08) { Demod.syncBit = 0x08; } - if(!Demod.syncBit) { - if(bit & 0x04) { Demod.syncBit = 0x04; } - } - else if(bit & 0x04) { Demod.syncBit = 0x04; bit <<= 4; } - if(!Demod.syncBit) { - if(bit & 0x02) { Demod.syncBit = 0x02; } - } - else if(bit & 0x02) { Demod.syncBit = 0x02; bit <<= 4; } - if(!Demod.syncBit) { - if(bit & 0x01) { Demod.syncBit = 0x01; } - - if(Demod.syncBit && (Demod.buffer & 0x08)) { - Demod.syncBit = 0x08; - - // The first half bitperiod is expected in next sample - Demod.posCount = 0; - Demod.output[Demod.len] = 0xfb; - } - } - else if(bit & 0x01) { Demod.syncBit = 0x01; } - */ if(bit & 0x08) { Demod.syncBit = 0x08; @@ -710,7 +671,7 @@ static RAMFUNC int ManchesterDecoding(int v) } //============================================================================= -// Finally, a `sniffer' for ISO 14443 Type A +// Finally, a `sniffer' for iClass communication // Both sides of communication! //============================================================================= @@ -721,11 +682,12 @@ static RAMFUNC int ManchesterDecoding(int v) //----------------------------------------------------------------------------- void RAMFUNC SnoopIClass(void) { -// #define RECV_CMD_OFFSET 2032 // original (working as of 21/2/09) values -// #define RECV_RES_OFFSET 2096 // original (working as of 21/2/09) values -// #define DMA_BUFFER_OFFSET 2160 // original (working as of 21/2/09) values -// #define DMA_BUFFER_SIZE 4096 // original (working as of 21/2/09) values -// #define TRACE_LENGTH 2000 // original (working as of 21/2/09) values +// DEFINED ABOVE +// #define RECV_CMD_OFFSET 3032 +// #define RECV_RES_OFFSET 3096 +// #define DMA_BUFFER_OFFSET 3160 +// #define DMA_BUFFER_SIZE 4096 +// #define TRACE_LENGTH 3000 // We won't start recording the frames that we acquire until we trigger; // a good trigger condition to get started is probably when we see a @@ -743,7 +705,10 @@ void RAMFUNC SnoopIClass(void) // into trace, along with its length and other annotations. //uint8_t *trace = (uint8_t *)BigBuf; - traceLen = 0; // uncommented to fix ISSUE 15 - gerhard - jan2011 + // reset traceLen to 0 + iso14a_set_tracing(TRUE); + iso14a_clear_tracelen(); + iso14a_set_trigger(FALSE); // The DMA buffer, used to stream samples from the FPGA int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET; @@ -836,7 +801,7 @@ void RAMFUNC SnoopIClass(void) if((div + 1) % 2 == 0) { smpl = decbyter; - if(MillerDecoding((smpl & 0xF0) >> 4)) { + if(OutOfNDecoding((smpl & 0xF0) >> 4)) { rsamples = samples - Uart.samples; LED_C_ON(); //if(triggered) { @@ -916,7 +881,651 @@ done: Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]); LED_A_OFF(); LED_B_OFF(); - LED_C_OFF(); + LED_C_OFF(); + LED_D_OFF(); +} + + +void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN, int direction) { + int i; + int j = 0; + + if(direction == 0) { + for(i = 0; i < 8; i++) { + rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5); + } + } else { + for(i = 0; i < 8; i++) { + if(i == 0) { j = 7; } else { j = i - 1; } + originalCSN[i] = (rotatedCSN[i] << 3) | (rotatedCSN[j] >> 5); + } + } +} + +//----------------------------------------------------------------------------- +// Wait for commands from reader +// Stop when button is pressed +// Or return TRUE when command is captured +//----------------------------------------------------------------------------- +static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen) +{ + // Set FPGA mode to "simulated ISO 14443A tag", no modulation (listen + // only, since we are receiving, not transmitting). + // Signal field is off with the appropriate LED + LED_D_OFF(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); + + // Now run a `software UART' on the stream of incoming samples. + Uart.output = received; + Uart.byteCntMax = maxLen; + Uart.state = STATE_UNSYNCD; + + for(;;) { + WDT_HIT(); + + if(BUTTON_PRESS()) return FALSE; + + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + /*if(OutOfNDecoding((b & 0xf0) >> 4)) { + *len = Uart.byteCnt; + return TRUE; + }*/ + if(OutOfNDecoding(b & 0x0f)) { + *len = Uart.byteCnt; + return TRUE; + } + } + } +} + + +//----------------------------------------------------------------------------- +// Prepare tag messages +//----------------------------------------------------------------------------- +static void CodeIClassTagAnswer(const uint8_t *cmd, int len) +{ + int i; + + ToSendReset(); + + // Send SOF + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + + for(i = 0; i < len; i++) { + int j; + uint8_t b = cmd[i]; + + // Data bits + for(j = 0; j < 8; j++) { + if(b & 1) { + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + } else { + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0x00; + } + b >>= 1; + } + } + + // Send EOF + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + + // Convert from last byte pos to length + ToSendMax++; +} + +// Only SOF +static void CodeIClassTagSOF() +{ + ToSendReset(); + + // Send SOF + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0xff; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xff; + + // Convert from last byte pos to length + ToSendMax++; +} + +//----------------------------------------------------------------------------- +// Simulate iClass Card +// Only CSN (Card Serial Number) +// +//----------------------------------------------------------------------------- +void SimulateIClass(uint8_t arg0, uint8_t *datain) +{ + // DEFINED ABOVE + // #define RECV_CMD_OFFSET 3032 + // #define RECV_RES_OFFSET 3096 + // #define DMA_BUFFER_OFFSET 3160 + // #define DMA_BUFFER_SIZE 4096 + // #define TRACE_LENGTH 3000 + uint8_t simType = arg0; + int SMALL_BUFFER_OFFSET = 2000; + bool fullbuffer = FALSE; + uint32_t parityBits = 0; + + iso14a_set_tracing(TRUE); + iso14a_clear_tracelen(); + iso14a_set_trigger(FALSE); + + // PREPARE PROTOCOL MESSAGES FIRST + + // Pointers to tag answers that should be stored in the buffer + uint8_t *response; + int responselength; + + // CSN followed by two CRC bytes + uint8_t response1[] = { 0x0f }; // Tag SOF + uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t response3[] = { 0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0, 0x00, 0x00 }; + int response1length = 1; + int response2length = 10; + int response3length = 10; + + // e-Purse + uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + int response4length = 8; + + if(simType == 0) { + // Use the CSN from commandline + memcpy(response3, datain, 8); + } + + // Construct anticollision-CSN + rotateCSN(response3,response2,0); + + // Compute CRC on both CSNs + ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]); + ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]); + + // Reader 0a + // Tag 0f + // Reader 0c + // Tag anticoll. CSN + // Reader 81 anticoll. CSN + // Tag CSN + + uint8_t *resp; + int respLen; + + // Respond SOF -- takes 8 bytes + uint8_t *resp1 = (((uint8_t *)BigBuf)); + int resp1Len; + + // Anticollision CSN (rotated CSN) + // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit) + uint8_t *resp2 = (((uint8_t *)BigBuf) + 10 + SMALL_BUFFER_OFFSET); + int resp2Len; + + // CSN + // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit) + uint8_t *resp3 = (((uint8_t *)BigBuf) + 190 + SMALL_BUFFER_OFFSET); + //int resp3Len; // NOT USED + + // e-Purse + // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit) + uint8_t *resp4 = (((uint8_t *)BigBuf) + 270 + SMALL_BUFFER_OFFSET); + int resp4Len; + + // + 1720.. + //uint8_t *receivedCmd = (uint8_t *)BigBuf; + uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); + memset(receivedCmd, 0x44, 64); + int len; + + // Reset trace buffer + memset(trace, 0x44, RECV_CMD_OFFSET); + + // Prepare card messages + ToSendMax = 0; + + // First card answer: SOF + CodeIClassTagSOF(); + memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax; + + // Anticollision CSN + CodeIClassTagAnswer(response2, sizeof(response2)); + memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax; + + // CSN + CodeIClassTagAnswer(response3, sizeof(response3)); + memcpy(resp3, ToSend, ToSendMax); //resp3Len = ToSendMax; // NOT USED + + // e-Purse + CodeIClassTagAnswer(response4, sizeof(response4)); + memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax; + + // We need to listen to the high-frequency, peak-detected path. + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaSetupSsc(); + + // To control where we are in the protocol + //int order = 0; + // int lastorder; // NOT USED + int cmdsRecvd = 0; + resp = resp1; respLen = 0; + response = response1; responselength = response1length; + LED_A_ON(); + for(;;) { + LED_B_OFF(); + if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) { + DbpString("button press"); + break; + } + + // Okay, look at the command now. + //lastorder = order; // NOT USED + if(receivedCmd[0] == 0x0a) { + // Reader in anticollission phase + resp = resp1; respLen = resp1Len; //order = 1; + response = response1; responselength = response1length; + //resp = resp2; respLen = resp2Len; order = 2; + //DbpString("Hello request from reader:"); + } else if(receivedCmd[0] == 0x0c) { + // Reader asks for anticollission CSN + resp = resp2; respLen = resp2Len; //order = 2; + response = response2; responselength = response2length; + //DbpString("Reader requests anticollission CSN:"); + } else if(receivedCmd[0] == 0x81) { + // Reader selects anticollission CSN. + // Tag sends the corresponding real CSN + resp = resp3; respLen = resp2Len; //order = 3; + response = response3; responselength = response3length; + //DbpString("Reader selects anticollission CSN:"); + } else if(receivedCmd[0] == 0x88) { + // Read e-purse (88 02) + resp = resp4; respLen = resp4Len; //order = 4; + response = response4; responselength = response4length; + LED_B_ON(); + } else if(receivedCmd[0] == 0x05) { + // Reader random and reader MAC!!! + // Lets store this ;-) + Dbprintf(" CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + response3[0], response3[1], response3[2], + response3[3], response3[4], response3[5], + response3[6], response3[7]); + Dbprintf("READER AUTH (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x", + len, + receivedCmd[0], receivedCmd[1], receivedCmd[2], + receivedCmd[3], receivedCmd[4], receivedCmd[5], + receivedCmd[6], receivedCmd[7], receivedCmd[8]); + + // Do not respond + // We do not know what to answer, so lets keep quit + resp = resp1; respLen = 0; //order = 5; + } else if(receivedCmd[0] == 0x00 && len == 1) { + // Reader ends the session + resp = resp1; respLen = 0; //order = 0; + } else { + // Never seen this command before + Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", + len, + receivedCmd[0], receivedCmd[1], receivedCmd[2], + receivedCmd[3], receivedCmd[4], receivedCmd[5], + receivedCmd[6], receivedCmd[7], receivedCmd[8]); + // Do not respond + resp = resp1; respLen = 0; //order = 0; + response = response1; responselength = response1length; + } + + if(cmdsRecvd > 999) { + DbpString("1000 commands later..."); + break; + } + else { + cmdsRecvd++; + } + + if(respLen <= 0) continue; + + SendIClassAnswer(resp, respLen, 21); + + // Store commands and responses in buffer + // as long as there is room for it. + if(traceLen < (SMALL_BUFFER_OFFSET - 32)) { + if(tracing) { + LogTrace(receivedCmd,len,0,GetParity(receivedCmd,len),TRUE); + parityBits = SwapBits(GetParity(response,responselength),responselength); + LogTrace(response,responselength,0,parityBits,FALSE); + } + } else if(!fullbuffer) { + DbpString("Trace buffer is full now..."); + fullbuffer = TRUE; + } + + memset(receivedCmd, 0x44, 32); + } + + //Dbprintf("Commands received: %d", cmdsRecvd); + LED_A_OFF(); + LED_B_OFF(); +} + +static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) +{ + int i = 0, u = 0, d = 0; + uint8_t b = 0; + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD); + AT91C_BASE_SSC->SSC_THR = 0x00; + FpgaSetupSsc(); + + // send cycle + for(;;) { + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + (void)b; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + if(d < delay) { + b = 0x00; + d++; + } + else if(i >= respLen) { + b = 0x00; + u++; + } else { + b = resp[i]; + u++; + if(u > 1) { i++; u = 0; } + } + AT91C_BASE_SSC->SSC_THR = b; + + if(u > 4) break; + } + if(BUTTON_PRESS()) { + break; + } + } + + return 0; +} + +/// THE READER CODE + +//----------------------------------------------------------------------------- +// Transmit the command (to the tag) that was placed in ToSend[]. +//----------------------------------------------------------------------------- +static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) +{ + int c; + + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + AT91C_BASE_SSC->SSC_THR = 0x00; + FpgaSetupSsc(); + + if (wait) + if(*wait < 10) + *wait = 10; + + for(c = 0; c < *wait;) { + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! + c++; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; + (void)r; + } + WDT_HIT(); + } + + uint8_t sendbyte; + bool firstpart = TRUE; + c = 0; + for(;;) { + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + + // DOUBLE THE SAMPLES! + if(firstpart) { + sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); + } + else { + sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); + c++; + } + if(sendbyte == 0xff) { + sendbyte = 0xfe; + } + AT91C_BASE_SSC->SSC_THR = sendbyte; + firstpart = !firstpart; + + if(c >= len) { + break; + } + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; + (void)r; + } + WDT_HIT(); + } + if (samples) *samples = (c + *wait) << 3; +} + + +//----------------------------------------------------------------------------- +// Prepare iClass reader command to send to FPGA +//----------------------------------------------------------------------------- +void CodeIClassCommand(const uint8_t * cmd, int len) +{ + int i, j, k; + uint8_t b; + + ToSendReset(); + + // Start of Communication: 1 out of 4 + ToSend[++ToSendMax] = 0xf0; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x0f; + ToSend[++ToSendMax] = 0x00; + + // Modulate the bytes + for (i = 0; i < len; i++) { + b = cmd[i]; + for(j = 0; j < 4; j++) { + for(k = 0; k < 4; k++) { + if(k == (b & 3)) { + ToSend[++ToSendMax] = 0x0f; + } + else { + ToSend[++ToSendMax] = 0x00; + } + } + b >>= 2; + } + } + + // End of Communication + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xf0; + ToSend[++ToSendMax] = 0x00; + + // Convert from last character reference to length + ToSendMax++; +} + +void ReaderTransmitIClass(uint8_t* frame, int len) +{ + int wait = 0; + int samples = 0; + int par = 0; + + // This is tied to other size changes + // uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024; + CodeIClassCommand(frame,len); + + // Select the card + TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait); + if(trigger) + LED_A_ON(); + + // Store reader command in buffer + if (tracing) LogTrace(frame,len,0,par,TRUE); +} + +//----------------------------------------------------------------------------- +// Wait a certain time for tag response +// If a response is captured return TRUE +// If it takes too long return FALSE +//----------------------------------------------------------------------------- +static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer +{ + // buffer needs to be 512 bytes + int c; + + // Set FPGA mode to "reader listen mode", no modulation (listen + // only, since we are receiving, not transmitting). + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); + + // Now get the answer from the card + Demod.output = receivedResponse; + Demod.len = 0; + Demod.state = DEMOD_UNSYNCD; + + uint8_t b; + if (elapsed) *elapsed = 0; + + bool skip = FALSE; + + c = 0; + for(;;) { + WDT_HIT(); + + if(BUTTON_PRESS()) return FALSE; + + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! + if (elapsed) (*elapsed)++; + } + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + if(c < timeout) { c++; } else { return FALSE; } + b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + skip = !skip; + if(skip) continue; + /*if(ManchesterDecoding((b>>4) & 0xf)) { + *samples = ((c - 1) << 3) + 4; + return TRUE; + }*/ + if(ManchesterDecoding(b & 0x0f)) { + *samples = c << 3; + return TRUE; + } + } + } +} + +int ReaderReceiveIClass(uint8_t* receivedAnswer) +{ + int samples = 0; + if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE; + if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); + if(samples == 0) return FALSE; + return Demod.len; +} + +// Reader iClass Anticollission +void ReaderIClass(uint8_t arg0) { + int i = 0; + int length = 0; + bool csn_failure = FALSE; + + uint8_t act_all[] = { 0x0a }; + uint8_t identify[] = { 0x0c }; + uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t check_csn[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + + 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(;;) { + if(traceLen > TRACE_LENGTH || BUTTON_PRESS()) break; + + // Send act_all + ReaderTransmitIClass(act_all, 1); + // Card present? + if(ReaderReceiveIClass(resp)) { + ReaderTransmitIClass(identify, 1); + if((length = ReaderReceiveIClass(resp))) { + if(length == 10) { + // Select card + memcpy(&select[1],resp,8); + ReaderTransmitIClass(select, sizeof(select)); + + if((length = ReaderReceiveIClass(resp))) { + if(length == 10) { + rotateCSN(check_csn,&select[1],1); + csn_failure = FALSE; + for(i = 0; i < 8; i++) { + if(check_csn[i] != resp[i]) { + csn_failure = TRUE; + break; + } + } + + if(!csn_failure) { + Dbprintf(" Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + check_csn[0], check_csn[1], check_csn[2], + check_csn[3], check_csn[4], check_csn[5], + check_csn[6], check_csn[7]); + } + // Card selected, whats next... ;-) + + } + } + } + } + } + WDT_HIT(); + } + + LED_A_OFF(); + } diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index 54fbb246..13a00aba 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -20,11 +20,12 @@ #include "crapto1.h" #include "mifareutil.h" -static uint8_t *trace = (uint8_t *) BigBuf; -static int traceLen = 0; -static int rsamples = 0; -static int tracing = TRUE; static uint32_t iso14a_timeout; +uint8_t *trace = (uint8_t *) BigBuf; +int traceLen = 0; +int rsamples = 0; +int tracing = TRUE; +uint8_t trigger = 0; // CARD TO READER - manchester // Sequence D: 11110000 modulation with subcarrier during first half @@ -41,7 +42,7 @@ static uint32_t iso14a_timeout; #define SEC_Y 0x00 #define SEC_Z 0xc0 -static const uint8_t OddByteParity[256] = { +const uint8_t OddByteParity[256] = { 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, @@ -60,7 +61,7 @@ static const uint8_t OddByteParity[256] = { 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1 }; -uint8_t trigger = 0; + void iso14a_set_trigger(int enable) { trigger = enable; } @@ -99,6 +100,7 @@ void AppendCrc14443a(uint8_t* data, int len) ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1); } +// The function LogTrace() is also used by the iClass implementation in iClass.c int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader) { // Return when trace is full diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c index 03241467..cb4904fd 100644 --- a/client/cmdhficlass.c +++ b/client/cmdhficlass.c @@ -170,11 +170,74 @@ int CmdHFiClassSnoop(const char *Cmd) return 0; } +int CmdHFiClassSim(const char *Cmd) +{ + uint8_t simType = 0; + uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0}; + + if (strlen(Cmd)<2) { + PrintAndLog("Usage: hf iclass sim "); + PrintAndLog(" sample: hf iclass sim 0 031FEC8AF7FF12E0"); + return 0; + } + + simType = param_get8(Cmd, 0); + if (param_gethex(Cmd, 1, CSN, 16)) { + PrintAndLog("A CSN should consist of 16 HEX symbols"); + return 1; + } + PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8)); + + UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType}}; + 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(const char *Cmd) +{ + uint8_t readerType = 0; + + if (strlen(Cmd)<1) { + PrintAndLog("Usage: hf iclass reader "); + PrintAndLog(" sample: hf iclass reader 0"); + return 0; + } + + readerType = param_get8(Cmd, 0); + 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; +} + static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, {"list", CmdHFiClassList, 0, "List iClass history"}, {"snoop", CmdHFiClassSnoop, 0, "Eavesdrop iClass communication"}, + {"sim", CmdHFiClassSim, 0, "Simulate iClass tag"}, + {"reader", CmdHFiClassReader, 0, "Read an iClass tag"}, {NULL, NULL, 0, NULL} }; diff --git a/client/cmdhficlass.h b/client/cmdhficlass.h index a8ae4d3e..c1bf60c7 100644 --- a/client/cmdhficlass.h +++ b/client/cmdhficlass.h @@ -15,6 +15,8 @@ int CmdHFiClass(const char *Cmd); int CmdHFiClassSnoop(const char *Cmd); +int CmdHFiClassSim(const char *Cmd); int CmdHFiClassList(const char *Cmd); +int CmdHFiClassReader(const char *Cmd); #endif diff --git a/include/usb_cmd.h b/include/usb_cmd.h index 389df4a7..a9096154 100644 --- a/include/usb_cmd.h +++ b/include/usb_cmd.h @@ -94,6 +94,8 @@ typedef struct { #define CMD_WRITER_LEGIC_RF 0x0399 #define CMD_SNOOP_ICLASS 0x0392 +#define CMD_SIMULATE_TAG_ICLASS 0x0393 +#define CMD_READER_ICLASS 0x0394 // For measurements of the antenna tuning #define CMD_MEASURE_ANTENNA_TUNING 0x0400 -- 2.39.2