X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/fb6e631fbb573765120d330eb7e83f44bdbde508..f6e01a34931850973012854318ac25a8cf623f06:/armsrc/legicrf.c?ds=inline diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c index 86e42c17..19f12a95 100644 --- a/armsrc/legicrf.c +++ b/armsrc/legicrf.c @@ -1,5 +1,6 @@ //----------------------------------------------------------------------------- // (c) 2009 Henryk Plötz +// 2016 Iceman // // 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 @@ -85,7 +86,7 @@ static void setup_timer(void) { #define FUZZ_EQUAL(value, target, fuzz) ((value) > ((target)-(fuzz)) && (value) < ((target)+(fuzz))) #ifndef SHORT_COIL -# define SHORT_COIL LOW(GPIO_SSC_DOUT); +# define SHORT_COIL LOW(GPIO_SSC_DOUT); #endif #ifndef OPEN_COIL # define OPEN_COIL HIGH(GPIO_SSC_DOUT); @@ -102,7 +103,7 @@ static void setup_timer(void) { WaitTicks( (RWD_TIME_PAUSE) ); \ OPEN_COIL; \ WaitTicks((x)); \ - } while (0) + } while (0); #endif // ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces. @@ -140,14 +141,13 @@ static void frame_clean(struct legic_frame * const f) { /* Generate Keystream */ uint32_t get_key_stream(int skip, int count) { - uint32_t key = 0; + int i; // Use int to enlarge timer tc to 32bit legic_prng_bc += prng_timer->TC_CV; // reset the prng timer. - ResetTimer(prng_timer); /* If skip == -1, forward prng time based */ if(skip == -1) { @@ -161,55 +161,41 @@ uint32_t get_key_stream(int skip, int count) { i = (count == 6) ? -1 : legic_read_count; - /* Write Time Data into LOG */ - // uint8_t *BigBuf = BigBuf_get_addr(); - // BigBuf[OFFSET_LOG+128+i] = legic_prng_count(); - // BigBuf[OFFSET_LOG+256+i*4] = (legic_prng_bc >> 0) & 0xff; - // BigBuf[OFFSET_LOG+256+i*4+1] = (legic_prng_bc >> 8) & 0xff; - // BigBuf[OFFSET_LOG+256+i*4+2] = (legic_prng_bc >>16) & 0xff; - // BigBuf[OFFSET_LOG+256+i*4+3] = (legic_prng_bc >>24) & 0xff; - // BigBuf[OFFSET_LOG+384+i] = count; + // log + //uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1), BYTEx(send, 0), BYTEx(send, 1), legic_prng_count()}; + //LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, TRUE); /* Generate KeyStream */ - for(i=0; iPIO_OER = GPIO_SSC_DOUT; AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT; - /* Use time to crypt frame */ - if(crypt) { - legic_prng_forward(2); /* TAG_FRAME_WAIT -> shift by 2 */ - response ^= legic_prng_get_bits(bits); - } + /* TAG_FRAME_WAIT -> shift by 2 */ + legic_prng_forward(2); + response ^= legic_prng_get_bits(bits); /* Wait for the frame start */ - WaitUS( TAG_FRAME_WAIT ); - - uint8_t bit = 0; - for(int i = 0; i < bits; i++) { + WaitTicks( TAG_FRAME_WAIT ); - bit = response & 1; - response >>= 1; - - if (bit) - HIGH(GPIO_SSC_DOUT); + for (; mask < BITMASK(bits); mask <<= 1) { + if (response & mask) + OPEN_COIL else - LOW(GPIO_SSC_DOUT); - - WaitUS(100); + SHORT_COIL + WaitTicks(TAG_BIT_PERIOD); } - LOW(GPIO_SSC_DOUT); + SHORT_COIL; } /* Send a frame in reader mode, the FPGA must have been set up by @@ -225,9 +211,9 @@ void frame_sendAsReader(uint32_t data, uint8_t bits){ for (; mask < BITMASK(bits); mask <<= 1) { if (send & mask) - COIL_PULSE(RWD_TIME_1); + COIL_PULSE(RWD_TIME_1) else - COIL_PULSE(RWD_TIME_0); + COIL_PULSE(RWD_TIME_0) } // Final pause to mark the end of the frame @@ -421,19 +407,15 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) { * - wait until the tag sends back an ACK ('1' bit unencrypted) * - forward the prng based on the timing */ -//int legic_write_byte(int byte, int addr, int addr_sz, int PrngCorrection) { -int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) { - - //do not write UID, CRC at offset 0-4. - if (addr <= 4) return 0; +int legic_write_byte(uint16_t index, uint8_t byte, uint8_t addr_sz) { // crc crc_clear(&legic_crc); crc_update(&legic_crc, 0, 1); /* CMD_WRITE */ - crc_update(&legic_crc, addr, addr_sz); + crc_update(&legic_crc, index, addr_sz); crc_update(&legic_crc, byte, 8); uint32_t crc = crc_finish(&legic_crc); - uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1); + uint32_t crc2 = legic4Crc(LEGIC_WRITE, index, byte, addr_sz+1); if ( crc != crc2 ) { Dbprintf("crc is missmatch"); return 1; @@ -441,25 +423,26 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) { // send write command uint32_t cmd = ((crc <<(addr_sz+1+8)) //CRC |(byte <<(addr_sz+1)) //Data - |(addr <<1) //Address - | LEGIC_WRITE); //CMD = Write + |(index <<1) //index + | LEGIC_WRITE); //CMD = Write uint32_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd - legic_prng_forward(2); /* we wait anyways */ + legic_prng_forward(2); WaitTicks(330); frame_sendAsReader(cmd, cmd_sz); - + + // wait for ack AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; - // wait for ack int t, old_level = 0, edges = 0; int next_bit_at = 0; - WaitUS(TAG_FRAME_WAIT); + // ACK 3.6ms = 3600us * 1.5 = 5400ticks. + WaitTicks(5360); for( t = 0; t < 80; ++t) { edges = 0; @@ -471,7 +454,8 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) { old_level = level; } - if(edges > 20 ) { /* expected are 42 edges */ + /* expected are 42 edges (ONE) */ + if(edges > 20 ) { int t = timer->TC_CV; int c = t / TAG_BIT_PERIOD; @@ -481,7 +465,6 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) { } } - ResetTimer(timer); return -1; } @@ -526,51 +509,16 @@ OUT: return 0; } -/*int _LegicRfWriter(int offset, int bytes, int addr_sz, uint8_t *BigBuf, int RoundBruteforceValue) { - int byte_index=0; - - LED_B_ON(); - setup_phase_reader(iv); - //legic_prng_forward(2); - while(byte_index < bytes) { - int r; - - //check if the DCF should be changed - if ( (offset == 0x05) && (bytes == 0x02) ) { - //write DCF in reverse order (addr 0x06 before 0x05) - r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz, RoundBruteforceValue); - //legic_prng_forward(1); - if(r == 0) { - byte_index++; - r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz, RoundBruteforceValue); - } - //legic_prng_forward(1); - } - else { - r = legic_write_byte(BigBuf[byte_index+offset], byte_index+offset, addr_sz, RoundBruteforceValue); - } - if((r != 0) || BUTTON_PRESS()) { - Dbprintf("operation aborted @ 0x%03.3x", byte_index); - switch_off_tag_rwd(); - LED_B_OFF(); - LED_C_OFF(); - return -1; - } - - WDT_HIT(); - byte_index++; - if(byte_index & 0x10) LED_C_ON(); else LED_C_OFF(); - } - LED_B_OFF(); - LED_C_OFF(); - DbpString("write successful"); - return 0; -}*/ - -void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) { +void LegicRfWriter(uint16_t offset, uint16_t len, uint8_t iv, uint8_t *data) { - int byte_index = 0; uint8_t isOK = 1; + + // UID not is writeable. + if ( offset <= 4 ) { + isOK = 0; + goto OUT; + } + legic_card_select_t card; LegicCommonInit(); @@ -580,63 +528,40 @@ void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) { goto OUT; } - switch_off_tag_rwd(); - - switch(card.tagtype) { - case 0x0d: - if(offset+bytes > 22) { - Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset + bytes); - return; - } - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes); - break; - case 0x1d: - if(offset+bytes > 0x100) { - Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset + bytes); - return; - } - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes); - break; - case 0x3d: - if(offset+bytes > 0x400) { - Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset + bytes); - return; - } - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset + bytes); - break; - default: - return; - } + if (len + offset >= card.cardsize) + len = card.cardsize - offset; - LED_B_ON(); setup_phase_reader(iv); - - int r = 0; - while(byte_index < bytes) { - //check if the DCF should be changed - if ( ((byte_index+offset) == 0x05) && (bytes >= 0x02) ) { - //write DCF in reverse order (addr 0x06 before 0x05) - r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize); - - // write second byte on success - if(r == 0) { - byte_index++; - r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize); - } - } - else { - r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, card.addrsize); - } + LED_B_ON(); + int r = 0; + // how about we write backwards instead. no need for this extra DCF check. + // index = len - cardsize + // stops uid 01234, + /* + len = 20 + offset = 5 + + index = 20+5 = 25 + if ( index > cardsize ) return -1; + + loop + write( cardmem[index], index , card.addrsize); + --index; + end loop + */ + uint16_t index = len; + while(index > 4) { + + r = legic_write_byte( index, cardmem[ index ], card.addrsize); - if ((r != 0) || BUTTON_PRESS()) { - Dbprintf("operation aborted @ 0x%03.3x", byte_index); + if ( r ) { + Dbprintf("operation aborted @ 0x%03.3x", index); isOK = 0; goto OUT; } - - WDT_HIT(); - byte_index++; + --index; + WDT_HIT(); } OUT: @@ -645,66 +570,6 @@ OUT: LEDsoff(); } -void LegicRfRawWriter(int address, int byte, uint8_t iv) { - - int byte_index = 0, addr_sz = 0; - - LegicCommonInit(); - - if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card"); - - uint32_t tag_type = setup_phase_reader(iv); - - switch_off_tag_rwd(); - - switch(tag_type) { - case 0x0d: - if(address > 22) { - Dbprintf("Error: can not write to 0x%03.3x on MIM22", address); - return; - } - addr_sz = 5; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); - break; - case 0x1d: - if(address > 0x100) { - Dbprintf("Error: can not write to 0x%03.3x on MIM256", address); - return; - } - addr_sz = 8; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); - break; - case 0x3d: - if(address > 0x400) { - Dbprintf("Error: can not write to 0x%03.3x on MIM1024", address); - return; - } - addr_sz = 10; - if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing at addr 0x%03.3x - value 0x%03.3x ...", address, byte); - break; - default: - Dbprintf("No or unknown card found, aborting"); - return; - } - - Dbprintf("integer value: %d address: %d addr_sz: %d", byte, address, addr_sz); - LED_B_ON(); - - setup_phase_reader(iv); - - int r = legic_write_byte(byte, address, addr_sz); - - if((r != 0) || BUTTON_PRESS()) { - Dbprintf("operation aborted @ 0x%03.3x (%1d)", byte_index, r); - switch_off_tag_rwd(); - LEDsoff(); - return; - } - - LEDsoff(); - if ( MF_DBGLEVEL >= 1) DbpString("write successful"); -} - int legic_select_card_iv(legic_card_select_t *p_card, uint8_t iv){ if ( p_card == NULL ) return 1; @@ -739,8 +604,42 @@ int legic_select_card(legic_card_select_t *p_card){ return legic_select_card_iv(p_card, 0x01); } +//----------------------------------------------------------------------------- +// Work with emulator memory +// +// Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_HF) here although FPGA is not +// involved in dealing with emulator memory. But if it is called later, it might +// destroy the Emulator Memory. +//----------------------------------------------------------------------------- +// arg0 = offset +// arg1 = num of bytes +void LegicEMemSet(uint32_t arg0, uint32_t arg1, uint8_t *data) { + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + legic_emlset_mem(data, arg0, arg1); +} +// arg0 = offset +// arg1 = num of bytes +void LegicEMemGet(uint32_t arg0, uint32_t arg1) { + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + uint8_t buf[USB_CMD_DATA_SIZE] = {0x00}; + legic_emlget_mem(buf, arg0, arg1); + LED_B_ON(); + cmd_send(CMD_ACK, arg0, arg1, 0, buf, USB_CMD_DATA_SIZE); + LED_B_OFF(); +} +void legic_emlset_mem(uint8_t *data, int offset, int numofbytes) { + cardmem = BigBuf_get_EM_addr(); + memcpy(cardmem + offset, data, numofbytes); +} +void legic_emlget_mem(uint8_t *data, int offset, int numofbytes) { + cardmem = BigBuf_get_EM_addr(); + memcpy(data, cardmem + offset, numofbytes); +} + void LegicRfInfo(void){ + int r; + uint8_t buf[sizeof(legic_card_select_t)] = {0x00}; legic_card_select_t *card = (legic_card_select_t*) buf; @@ -753,7 +652,7 @@ void LegicRfInfo(void){ // read UID bytes for ( uint8_t i = 0; i < sizeof(card->uid); ++i) { - int r = legic_read_byte(i, card->cmdsize); + r = legic_read_byte(i, card->cmdsize); if ( r == -1 ) { cmd_send(CMD_ACK,0,0,0,0,0); goto OUT; @@ -761,6 +660,15 @@ void LegicRfInfo(void){ card->uid[i] = r & 0xFF; } + // MCC byte. + r = legic_read_byte(4, card->cmdsize); + uint32_t calc_mcc = CRC8Legic(card->uid, 4);; + if ( r != calc_mcc) { + cmd_send(CMD_ACK,0,0,0,0,0); + goto OUT; + } + + // OK cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t)); OUT: @@ -775,26 +683,26 @@ static void frame_handle_tag(struct legic_frame const * const f) { uint8_t *BigBuf = BigBuf_get_addr(); - /* First Part of Handshake (IV) */ - if(f->bits == 7) { + /* First Part of Handshake (IV) */ + if(f->bits == 7) { + + LED_C_ON(); - LED_C_ON(); - // Reset prng timer ResetTimer(prng_timer); - - legic_prng_init(f->data); - frame_send_tag(0x3d, 6, 1); /* 0x3d^0x26 = 0x1B */ - legic_state = STATE_IV; - legic_read_count = 0; - legic_prng_bc = 0; - legic_prng_iv = f->data; - - + + legic_prng_init(f->data); + frame_send_tag(0x3d, 6); /* 0x3d^0x26 = 0x1B */ + legic_state = STATE_IV; + legic_read_count = 0; + legic_prng_bc = 0; + legic_prng_iv = f->data; + + ResetTimer(timer); WaitUS(280); - return; - } + return; + } /* 0x19==??? */ if(legic_state == STATE_IV) { @@ -828,7 +736,7 @@ static void frame_handle_tag(struct legic_frame const * const f) //Dbprintf("Data:%03.3x, key:%03.3x, addr: %03.3x, read_c:%u", f->data, key, addr, read_c); legic_prng_forward(legic_reqresp_drift); - frame_send_tag(hash | data, 12, 1); + frame_send_tag(hash | data, 12); ResetTimer(timer); legic_prng_forward(2);