X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/be09ea86035044f67e0419b067ac54ee055ad9ee..df7b80fecce977455a542e6a0a82a17e62521301:/armsrc/iso15693.c diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c index 9c50c036..9f6516aa 100644 --- a/armsrc/iso15693.c +++ b/armsrc/iso15693.c @@ -58,7 +58,7 @@ #include "string.h" #include "iso15693tools.h" #include "protocols.h" -#include "cmd.h" +#include "usb_cdc.h" #include "BigBuf.h" #include "fpgaloader.h" @@ -75,6 +75,12 @@ #define DELAY_TAG_TO_ARM_SNOOP 32 #define DELAY_READER_TO_ARM_SNOOP 32 +// times in samples @ 212kHz when acting as reader +//#define ISO15693_READER_TIMEOUT 80 // 80/212kHz = 378us, nominal t1_max=313,9us +#define ISO15693_READER_TIMEOUT 330 // 330/212kHz = 1558us, should be even enough for iClass tags responding to ACTALL +#define ISO15693_READER_TIMEOUT_WRITE 4700 // 4700/212kHz = 22ms, nominal 20ms + + static int DEBUG = 0; @@ -84,7 +90,7 @@ static int DEBUG = 0; /////////////////////////////////////////////////////////////////////// // buffers -#define ISO15693_DMA_BUFFER_SIZE 128 // must be a power of 2 +#define ISO15693_DMA_BUFFER_SIZE 256 // must be a power of 2 #define ISO15693_MAX_RESPONSE_LENGTH 36 // allows read single block with the maximum block size of 256bits. Read multiple blocks not supported yet #define ISO15693_MAX_COMMAND_LENGTH 45 // allows write single block with the maximum block size of 256bits. Write multiple blocks not supported yet @@ -140,6 +146,15 @@ void CodeIso15693AsReader(uint8_t *cmd, int n) { ToSendMax++; } + +// Encode EOF only +static void CodeIso15693AsReaderEOF() { + ToSendReset(); + ToSend[++ToSendMax] = 0x20; + ToSendMax++; +} + + // encode data using "1 out of 256" scheme // data rate is 1,66 kbit/s (fc/8192) // is designed for more robust communication over longer distances @@ -341,11 +356,6 @@ void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t *start_time, } -static void jam(void) { - // send a short burst to jam the reader signal -} - - //============================================================================= // An ISO 15693 decoder for tag responses (one subcarrier only). // Uses cross correlation to identify each bit and EOF. @@ -392,7 +402,7 @@ typedef struct DecodeTag { } DecodeTag_t; -static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint16_t amplitude, DecodeTag_t *restrict DecodeTag) { +static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint16_t amplitude, DecodeTag_t *DecodeTag) { switch (DecodeTag->state) { case STATE_TAG_SOF_LOW: // waiting for a rising edge @@ -745,7 +755,8 @@ typedef struct DecodeReader { STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF, STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4, STATE_READER_RECEIVE_DATA_1_OUT_OF_4, - STATE_READER_RECEIVE_DATA_1_OUT_OF_256 + STATE_READER_RECEIVE_DATA_1_OUT_OF_256, + STATE_READER_RECEIVE_JAMMING } state; enum { CODING_1_OUT_OF_4, @@ -781,7 +792,7 @@ static void DecodeReaderReset(DecodeReader_t* DecodeReader) { } -static int inline __attribute__((always_inline)) Handle15693SampleFromReader(bool bit, DecodeReader_t *restrict DecodeReader) { +static int inline __attribute__((always_inline)) Handle15693SampleFromReader(bool bit, DecodeReader_t *DecodeReader) { switch (DecodeReader->state) { case STATE_READER_UNSYNCD: // wait for unmodulated carrier @@ -920,12 +931,6 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(boo } if (DecodeReader->bitCount == 15) { // we have a full byte DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg; - if (DecodeReader->byteCount == DecodeReader->jam_search_len) { - if (!memcmp(DecodeReader->output, DecodeReader->jam_search_string, DecodeReader->jam_search_len)) { - jam(); // send a jamming signal - Dbprintf("JAMMING!"); - } - } if (DecodeReader->byteCount > DecodeReader->byteCountMax) { // buffer overflow, give up LED_B_OFF(); @@ -933,6 +938,13 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(boo } DecodeReader->bitCount = 0; DecodeReader->shiftReg = 0; + if (DecodeReader->byteCount == DecodeReader->jam_search_len) { + if (!memcmp(DecodeReader->output, DecodeReader->jam_search_string, DecodeReader->jam_search_len)) { + LED_D_ON(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_JAM); + DecodeReader->state = STATE_READER_RECEIVE_JAMMING; + } + } } else { DecodeReader->bitCount++; } @@ -968,11 +980,42 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(boo LED_B_OFF(); DecodeReaderReset(DecodeReader); } + if (DecodeReader->byteCount == DecodeReader->jam_search_len) { + if (!memcmp(DecodeReader->output, DecodeReader->jam_search_string, DecodeReader->jam_search_len)) { + LED_D_ON(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_JAM); + DecodeReader->state = STATE_READER_RECEIVE_JAMMING; + } + } } DecodeReader->bitCount++; } break; + case STATE_READER_RECEIVE_JAMMING: + DecodeReader->posCount++; + if (DecodeReader->Coding == CODING_1_OUT_OF_4) { + if (DecodeReader->posCount == 7*16) { // 7 bits jammed + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE); // stop jamming + // FpgaDisableTracing(); + LED_D_OFF(); + } else if (DecodeReader->posCount == 8*16) { + DecodeReader->posCount = 0; + DecodeReader->output[DecodeReader->byteCount++] = 0x00; + DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_4; + } + } else { + if (DecodeReader->posCount == 7*256) { // 7 bits jammend + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE); // stop jamming + LED_D_OFF(); + } else if (DecodeReader->posCount == 8*256) { + DecodeReader->posCount = 0; + DecodeReader->output[DecodeReader->byteCount++] = 0x00; + DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_256; + } + } + break; + default: LED_B_OFF(); DecodeReaderReset(DecodeReader); @@ -1077,16 +1120,12 @@ int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eo } -// Encode (into the ToSend buffers) an identify request, which is the first +// Construct an identify (Inventory) request, which is the first // thing that you must send to a tag to get a response. -static void BuildIdentifyRequest(void) -{ - uint8_t cmd[5]; - +static void BuildIdentifyRequest(uint8_t *cmd) { uint16_t crc; // one sub-carrier, inventory, 1 slot, fast rate - // AFI is at bit 5 (1<<4) when doing an INVENTORY - cmd[0] = (1 << 2) | (1 << 5) | (1 << 1); + cmd[0] = ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1 | ISO15693_REQ_DATARATE_HIGH; // inventory command code cmd[1] = 0x01; // no mask @@ -1095,8 +1134,6 @@ static void BuildIdentifyRequest(void) crc = Iso15693Crc(cmd, 3); cmd[3] = crc & 0xff; cmd[4] = crc >> 8; - - CodeIso15693AsReader(cmd, sizeof(cmd)); } @@ -1105,8 +1142,7 @@ static void BuildIdentifyRequest(void) // for the response. The response is not demodulated, just left in the buffer // so that it can be downloaded to a PC and processed there. //----------------------------------------------------------------------------- -void AcquireRawAdcSamplesIso15693(void) -{ +void AcquireRawAdcSamplesIso15693(void) { LED_A_ON(); uint8_t *dest = BigBuf_get_addr(); @@ -1117,7 +1153,9 @@ void AcquireRawAdcSamplesIso15693(void) FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - BuildIdentifyRequest(); + uint8_t cmd[5]; + BuildIdentifyRequest(cmd); + CodeIso15693AsReader(cmd, sizeof(cmd)); // Give the tags time to energize SpinDelay(100); @@ -1212,7 +1250,7 @@ void SnoopIso15693(uint8_t jam_search_len, uint8_t *jam_search_string) { if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. upTo = dmaBuf; // start reading the circular buffer from the beginning if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { - FpgaDisableTracing(); + // FpgaDisableTracing(); Dbprintf("About to blow circular buffer - aborted! behindBy=%d, samples=%d", behindBy, samples); break; } @@ -1305,8 +1343,6 @@ void SnoopIso15693(uint8_t jam_search_len, uint8_t *jam_search_string) { FpgaDisableSscDma(); - LEDsoff(); - DbpString("Snoop statistics:"); Dbprintf(" ExpectTagAnswer: %d, TagIsActive: %d, ReaderIsActive: %d", ExpectTagAnswer, TagIsActive, ReaderIsActive); Dbprintf(" DecodeTag State: %d", DecodeTag.state); @@ -1345,10 +1381,7 @@ void Iso15693InitReader() { // uid is in transmission order (which is reverse of display order) -static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber ) -{ - uint8_t cmd[13]; - +static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber, uint8_t *cmd) { uint16_t crc; // If we set the Option_Flag in this request, the VICC will respond with the security status of the block // followed by the block data @@ -1372,13 +1405,11 @@ static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber ) cmd[11] = crc & 0xff; cmd[12] = crc >> 8; - CodeIso15693AsReader(cmd, sizeof(cmd)); } // Now the VICC>VCD responses when we are simulating a tag -static void BuildInventoryResponse(uint8_t *uid) -{ +static void BuildInventoryResponse(uint8_t *uid) { uint8_t cmd[12]; uint16_t crc; @@ -1407,7 +1438,7 @@ static void BuildInventoryResponse(uint8_t *uid) // speed ... 0 low speed, 1 hi speed // *recv will contain the tag's answer // return: length of received data, or -1 for timeout -int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint32_t *eof_time) { +int SendDataTag(uint8_t *send, int sendlen, bool init, bool speed_fast, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint16_t timeout, uint32_t *eof_time) { if (init) { Iso15693InitReader(); @@ -1416,19 +1447,40 @@ int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t *recv, int answerLen = 0; - if (!speed) { - // low speed (1 out of 256) - CodeIso15693AsReader256(send, sendlen); - } else { + if (speed_fast) { // high speed (1 out of 4) CodeIso15693AsReader(send, sendlen); + } else { + // low speed (1 out of 256) + CodeIso15693AsReader256(send, sendlen); } TransmitTo15693Tag(ToSend, ToSendMax, &start_time); + uint32_t end_time = start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF + LogTrace_ISO15693(send, sendlen, start_time*4, end_time*4, NULL, true); // Now wait for a response if (recv != NULL) { - answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, ISO15693_READER_TIMEOUT, eof_time); + answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, timeout, eof_time); + } + + return answerLen; +} + + +int SendDataTagEOF(uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint16_t timeout, uint32_t *eof_time) { + + int answerLen = 0; + + CodeIso15693AsReaderEOF(); + + TransmitTo15693Tag(ToSend, ToSendMax, &start_time); + uint32_t end_time = start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF + LogTrace_ISO15693(NULL, 0, start_time*4, end_time*4, NULL, true); + + // Now wait for a response + if (recv != NULL) { + answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, timeout, eof_time); } return answerLen; @@ -1520,7 +1572,6 @@ void ReaderIso15693(uint32_t parameter) { set_tracing(true); - int answerLen = 0; uint8_t TagUID[8] = {0x00}; FpgaDownloadAndGo(FPGA_BITSTREAM_HF); @@ -1546,17 +1597,14 @@ void ReaderIso15693(uint32_t parameter) { // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME // Now send the IDENTIFY command - BuildIdentifyRequest(); + uint8_t cmd[5]; + BuildIdentifyRequest(cmd); uint32_t start_time = 0; - TransmitTo15693Tag(ToSend, ToSendMax, &start_time); - - // Now wait for a response uint32_t eof_time; - answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2, &eof_time) ; + int answerLen = SendDataTag(cmd, sizeof(cmd), true, true, answer, sizeof(answer), start_time, ISO15693_READER_TIMEOUT, &eof_time); start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER; - if (answerLen >=12) // we should do a better check than this - { + if (answerLen >= 12) { // we should do a better check than this TagUID[0] = answer[2]; TagUID[1] = answer[3]; TagUID[2] = answer[4]; @@ -1565,7 +1613,6 @@ void ReaderIso15693(uint32_t parameter) { TagUID[5] = answer[7]; TagUID[6] = answer[8]; // IC Manufacturer code TagUID[7] = answer[9]; // always E0 - } Dbprintf("%d octets read from IDENTIFY request:", answerLen); @@ -1578,21 +1625,12 @@ void ReaderIso15693(uint32_t parameter) { TagUID[7],TagUID[6],TagUID[5],TagUID[4], TagUID[3],TagUID[2],TagUID[1],TagUID[0]); - - // Dbprintf("%d octets read from SELECT request:", answerLen2); - // DbdecodeIso15693Answer(answerLen2,answer2); - // Dbhexdump(answerLen2,answer2,true); - - // Dbprintf("%d octets read from XXX request:", answerLen3); - // DbdecodeIso15693Answer(answerLen3,answer3); - // Dbhexdump(answerLen3,answer3,true); - // read all pages if (answerLen >= 12 && DEBUG) { for (int i = 0; i < 32; i++) { // sanity check, assume max 32 pages - BuildReadBlockRequest(TagUID, i); - TransmitTo15693Tag(ToSend, ToSendMax, &start_time); - int answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2, &eof_time); + uint8_t cmd[13]; + BuildReadBlockRequest(TagUID, i, cmd); + answerLen = SendDataTag(cmd, sizeof(cmd), false, true, answer, sizeof(answer), start_time, ISO15693_READER_TIMEOUT, &eof_time); start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER; if (answerLen > 0) { Dbprintf("READ SINGLE BLOCK %d returned %d octets:", i, answerLen); @@ -1603,7 +1641,7 @@ void ReaderIso15693(uint32_t parameter) { } } - // for the time being, switch field off to protect rdv4.0 + // for the time being, switch field off to protect RDV4 // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_D_OFF(); @@ -1654,8 +1692,7 @@ void SimTagIso15693(uint32_t parameter, uint8_t *uid) { // Since there is no standardized way of reading the AFI out of a tag, we will brute force it // (some manufactures offer a way to read the AFI, though) -void BruteforceIso15693Afi(uint32_t speed) -{ +void BruteforceIso15693Afi(uint32_t speed) { LED_A_ON(); uint8_t data[6]; @@ -1671,7 +1708,7 @@ void BruteforceIso15693Afi(uint32_t speed) data[2] = 0; // mask length datalen = Iso15693AddCrc(data,3); uint32_t start_time = GetCountSspClk(); - recvlen = SendDataTag(data, datalen, true, speed, recv, sizeof(recv), 0, &eof_time); + recvlen = SendDataTag(data, datalen, true, speed, recv, sizeof(recv), 0, ISO15693_READER_TIMEOUT, &eof_time); start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER; WDT_HIT(); if (recvlen>=12) { @@ -1688,7 +1725,7 @@ void BruteforceIso15693Afi(uint32_t speed) for (int i = 0; i < 256; i++) { data[2] = i & 0xFF; datalen = Iso15693AddCrc(data,4); - recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time, &eof_time); + recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time, ISO15693_READER_TIMEOUT, &eof_time); start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER; WDT_HIT(); if (recvlen >= 12) { @@ -1712,13 +1749,35 @@ void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH]; uint32_t eof_time; + uint16_t timeout; + bool request_answer = false; + + switch (data[1]) { + case ISO15693_WRITEBLOCK: + case ISO15693_LOCKBLOCK: + case ISO15693_WRITE_MULTI_BLOCK: + case ISO15693_WRITE_AFI: + case ISO15693_LOCK_AFI: + case ISO15693_WRITE_DSFID: + case ISO15693_LOCK_DSFID: + timeout = ISO15693_READER_TIMEOUT_WRITE; + request_answer = data[0] & ISO15693_REQ_OPTION; + break; + default: + timeout = ISO15693_READER_TIMEOUT; + } + if (DEBUG) { Dbprintf("SEND:"); Dbhexdump(datalen, data, false); } - recvlen = SendDataTag(data, datalen, true, speed, (recv?recvbuf:NULL), sizeof(recvbuf), 0, &eof_time); + recvlen = SendDataTag(data, datalen, true, speed, (recv?recvbuf:NULL), sizeof(recvbuf), 0, timeout, &eof_time); + if (request_answer) { // send a single EOF to get the tag response + recvlen = SendDataTagEOF((recv?recvbuf:NULL), sizeof(recvbuf), 0, ISO15693_READER_TIMEOUT, &eof_time); + } + // for the time being, switch field off to protect rdv4.0 // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); @@ -1746,16 +1805,16 @@ void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint // //----------------------------------------------------------------------------- -// Set the UID to the tag (based on Iceman work). +// Set the UID on Magic ISO15693 tag (based on Iceman's LUA-script). void SetTag15693Uid(uint8_t *uid) { LED_A_ON(); uint8_t cmd[4][9] = { - {0x02, 0x21, 0x3e, 0x00, 0x00, 0x00, 0x00}, - {0x02, 0x21, 0x3f, 0x69, 0x96, 0x00, 0x00}, - {0x02, 0x21, 0x38}, - {0x02, 0x21, 0x39} + {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x3e, 0x00, 0x00, 0x00, 0x00}, + {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x3f, 0x69, 0x96, 0x00, 0x00}, + {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x38}, + {ISO15693_REQ_DATARATE_HIGH, ISO15693_WRITEBLOCK, 0x39} }; uint16_t crc; @@ -1776,30 +1835,35 @@ void SetTag15693Uid(uint8_t *uid) { cmd[3][5] = uid[1]; cmd[3][6] = uid[0]; + uint32_t start_time = 0; + for (int i = 0; i < 4; i++) { // Add the CRC crc = Iso15693Crc(cmd[i], 7); cmd[i][7] = crc & 0xff; cmd[i][8] = crc >> 8; + recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), i==0?true:false, true, recvbuf, sizeof(recvbuf), start_time, ISO15693_READER_TIMEOUT_WRITE, &eof_time); + start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER; if (DEBUG) { Dbprintf("SEND:"); Dbhexdump(sizeof(cmd[i]), cmd[i], false); - } - - recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), true, 1, recvbuf, sizeof(recvbuf), 0, &eof_time); - - if (DEBUG) { Dbprintf("RECV:"); if (recvlen > 0) { Dbhexdump(recvlen, recvbuf, false); DbdecodeIso15693Answer(recvlen, recvbuf); } } - - cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH); + // Note: need to know if we expect an answer from one of the magic commands + // if (recvlen < 0) { + // break; + // } } + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + + cmd_send(CMD_ACK, recvlen, 0, 0, recvbuf, recvlen); LED_A_OFF(); }