From 8578ea82cc7b537961ae4f02d00eb63d5845a330 Mon Sep 17 00:00:00 2001 From: pwpiwi Date: Thu, 18 Apr 2019 17:22:00 +0200 Subject: [PATCH] fix hf mf sim * use DMA to receive reader command * switch earlier from send to listen mode * move ADC initializer to iso14443_setup * remove remainders of incomplete Mifare 10Byte UID simulation * show 'short' bytes (7Bits or 8Bits without parity) in 'hf list mf' and 'hf list 14a' * whitespace --- armsrc/iso14443a.c | 844 +++++++++++++++++++++++--------------------- armsrc/iso14443a.h | 1 - armsrc/mifaresim.c | 62 ++-- armsrc/mifareutil.c | 270 +++++++------- client/cmdhflist.c | 15 +- client/cmdhfmf.c | 12 +- include/usb_cmd.h | 11 +- 7 files changed, 618 insertions(+), 597 deletions(-) diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c index c40f9999..0ca9873b 100644 --- a/armsrc/iso14443a.c +++ b/armsrc/iso14443a.c @@ -68,7 +68,7 @@ typedef struct { // DROP_FIRST_HALF, } state; uint16_t shiftReg; - int16_t bitCount; + int16_t bitCount; uint16_t len; uint16_t byteCntMax; uint16_t posCnt; @@ -77,7 +77,7 @@ typedef struct { uint8_t parityLen; uint32_t fourBits; uint32_t startTime, endTime; - uint8_t *output; + uint8_t *output; uint8_t *parity; } tUart; @@ -94,8 +94,8 @@ static uint8_t iso14_pcb_blocknum = 0; // // minimum time between the start bits of consecutive transfers from reader to tag: 7000 carrier (13.56Mhz) cycles #define REQUEST_GUARD_TIME (7000/16 + 1) -// minimum time between last modulation of tag and next start bit from reader to tag: 1172 carrier cycles -#define FRAME_DELAY_TIME_PICC_TO_PCD (1172/16 + 1) +// minimum time between last modulation of tag and next start bit from reader to tag: 1172 carrier cycles +#define FRAME_DELAY_TIME_PICC_TO_PCD (1172/16 + 1) // bool LastCommandWasRequest = false; // @@ -107,8 +107,8 @@ static uint8_t iso14_pcb_blocknum = 0; // 8 ticks until bit_to_arm is assigned from curbit // 8*16 ticks for the transfer from FPGA to ARM // 4*16 ticks until we measure the time -// - 8*16 ticks because we measure the time of the previous transfer -#define DELAY_AIR2ARM_AS_READER (3 + 16 + 8 + 8*16 + 4*16 - 8*16) +// - 8*16 ticks because we measure the time of the previous transfer +#define DELAY_AIR2ARM_AS_READER (3 + 16 + 8 + 8*16 + 4*16 - 8*16) // When the PM acts as a reader and is sending, it takes // 4*16 ticks until we can write data to the sending hold register @@ -125,10 +125,10 @@ static uint8_t iso14_pcb_blocknum = 0; // 8 ticks until the SSC samples the first data // 7*16 ticks to complete the transfer from FPGA to ARM // 8 ticks until the next ssp_clk rising edge -// 4*16 ticks until we measure the time -// - 8*16 ticks because we measure the time of the previous transfer +// 4*16 ticks until we measure the time +// - 8*16 ticks because we measure the time of the previous transfer #define DELAY_AIR2ARM_AS_TAG (2 + 3 + 8 + 8 + 7*16 + 8 + 4*16 - 8*16) - + // The FPGA will report its internal sending delay in uint16_t FpgaSendQueueDelay; // the 5 first bits are the number of bits buffered in mod_sig_buf @@ -150,16 +150,16 @@ uint16_t FpgaSendQueueDelay; // 8 ticks (on average) until the result is stored in to_arm // + the delays in transferring data - which is the same for // sniffing reader and tag data and therefore not relevant -#define DELAY_TAG_AIR2ARM_AS_SNIFFER (3 + 14 + 8) - +#define DELAY_TAG_AIR2ARM_AS_SNIFFER (3 + 14 + 8) + // When the PM acts as sniffer and is receiving reader data, it takes -// 2 ticks delay in analogue RF receiver (for the falling edge of the +// 2 ticks delay in analogue RF receiver (for the falling edge of the // start bit, which marks the start of the communication) // 3 ticks A/D conversion // 8 ticks on average until the data is stored in to_arm. // + the delays in transferring data - which is the same for // sniffing reader and tag data and therefore not relevant -#define DELAY_READER_AIR2ARM_AS_SNIFFER (2 + 3 + 8) +#define DELAY_READER_AIR2ARM_AS_SNIFFER (2 + 3 + 8) //variables used for timing purposes: //these are in ssp_clk cycles: @@ -177,12 +177,12 @@ static uint32_t LastProxToAirDuration; // 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 +#define SEC_D 0xf0 +#define SEC_E 0x0f +#define SEC_F 0x00 +#define SEC_X 0x0c +#define SEC_Y 0x00 +#define SEC_Z 0xc0 void iso14a_set_trigger(bool enable) { trigger = enable; @@ -214,8 +214,8 @@ void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) // Generate the parity bits parityBits |= ((oddparity8(pbtCmd[i])) << (7-paritybit_cnt)); if (paritybit_cnt == 7) { - par[paritybyte_cnt] = parityBits; // save 8 Bits parity - parityBits = 0; // and advance to next Parity Byte + par[paritybyte_cnt] = parityBits; // save 8 Bits parity + parityBits = 0; // and advance to next Parity Byte paritybyte_cnt++; paritybit_cnt = 0; } else { @@ -225,7 +225,7 @@ void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par) // save remaining parity bits par[paritybyte_cnt] = parityBits; - + } void AppendCrc14443a(uint8_t* data, int len) @@ -244,14 +244,14 @@ static void AppendCrc14443b(uint8_t* data, int len) //============================================================================= // Basics: // This decoder is used when the PM3 acts as a tag. -// The reader will generate "pauses" by temporarily switching of the field. -// At the PM3 antenna we will therefore measure a modulated antenna voltage. +// The reader will generate "pauses" by temporarily switching of the field. +// At the PM3 antenna we will therefore measure a modulated antenna voltage. // The FPGA does a comparison with a threshold and would deliver e.g.: // ........ 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 ....... // The Miller decoder needs to identify the following sequences: -// 2 (or 3) ticks pause followed by 6 (or 5) ticks unmodulated: pause at beginning - Sequence Z ("start of communication" or a "0") -// 8 ticks without a modulation: no pause - Sequence Y (a "0" or "end of communication" or "no information") -// 4 ticks unmodulated followed by 2 (or 3) ticks pause: pause in second half - Sequence X (a "1") +// 2 (or 3) ticks pause followed by 6 (or 5) ticks unmodulated: pause at beginning - Sequence Z ("start of communication" or a "0") +// 8 ticks without a modulation: no pause - Sequence Y (a "0" or "end of communication" or "no information") +// 4 ticks unmodulated followed by 2 (or 3) ticks pause: pause in second half - Sequence X (a "1") // Note 1: the bitstream may start at any time. We therefore need to sync. // Note 2: the interpretation of Sequence Y and Z depends on the preceding sequence. //----------------------------------------------------------------------------- @@ -274,19 +274,19 @@ static void UartReset() { Uart.state = STATE_UNSYNCD; Uart.bitCount = 0; - Uart.len = 0; // number of decoded data bytes - Uart.parityLen = 0; // number of decoded parity bytes - Uart.shiftReg = 0; // shiftreg to hold decoded data bits - Uart.parityBits = 0; // holds 8 parity bits - Uart.startTime = 0; - Uart.endTime = 0; + Uart.len = 0; // number of decoded data bytes + Uart.parityLen = 0; // number of decoded parity bytes + Uart.shiftReg = 0; // shiftreg to hold decoded data bits + Uart.parityBits = 0; // holds 8 parity bits } static void UartInit(uint8_t *data, uint8_t *parity) { Uart.output = data; Uart.parity = parity; - Uart.fourBits = 0x00000000; // clear the buffer for 4 Bits + Uart.fourBits = 0x00000000; // clear the buffer for 4 Bits + Uart.startTime = 0; + Uart.endTime = 0; UartReset(); } @@ -295,17 +295,17 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) { Uart.fourBits = (Uart.fourBits << 8) | bit; - - if (Uart.state == STATE_UNSYNCD) { // not yet synced - - Uart.syncBit = 9999; // not set + + if (Uart.state == STATE_UNSYNCD) { // not yet synced + + Uart.syncBit = 9999; // not set // The start bit is one ore more Sequence Y followed by a Sequence Z (... 11111111 00x11111). We need to distinguish from // Sequence X followed by Sequence Y followed by Sequence Z (111100x1 11111111 00x11111) - // we therefore look for a ...xx11111111111100x11111xxxxxx... pattern + // we therefore look for a ...xx11111111111100x11111xxxxxx... pattern // (12 '1's followed by 2 '0's, eventually followed by another '0', followed by 5 '1's) - #define ISO14443A_STARTBIT_MASK 0x07FFEF80 // mask is 00000111 11111111 11101111 10000000 - #define ISO14443A_STARTBIT_PATTERN 0x07FF8F80 // pattern is 00000111 11111111 10001111 10000000 - if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7; + #define ISO14443A_STARTBIT_MASK 0x07FFEF80 // mask is 00000111 11111111 11101111 10000000 + #define ISO14443A_STARTBIT_PATTERN 0x07FF8F80 // pattern is 00000111 11111111 10001111 10000000 + if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7; else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 1)) == ISO14443A_STARTBIT_PATTERN >> 1) Uart.syncBit = 6; else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 2)) == ISO14443A_STARTBIT_PATTERN >> 2) Uart.syncBit = 5; else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 3)) == ISO14443A_STARTBIT_PATTERN >> 3) Uart.syncBit = 4; @@ -314,7 +314,7 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 6)) == ISO14443A_STARTBIT_PATTERN >> 6) Uart.syncBit = 1; else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0; - if (Uart.syncBit != 9999) { // found a sync bit + if (Uart.syncBit != 9999) { // found a sync bit Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8); Uart.startTime -= Uart.syncBit; Uart.endTime = Uart.startTime; @@ -324,97 +324,97 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) } else { - if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) { - if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error + if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) { + if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation in both halves - error LED_B_OFF(); UartReset(); - } else { // Modulation in first half = Sequence Z = logic "0" - if (Uart.state == STATE_MILLER_X) { // error - must not follow after X + } else { // Modulation in first half = Sequence Z = logic "0" + if (Uart.state == STATE_MILLER_X) { // error - must not follow after X LED_B_OFF(); UartReset(); } else { Uart.bitCount++; - Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg + Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg Uart.state = STATE_MILLER_Z; Uart.endTime = Uart.startTime + 8*(9*Uart.len + Uart.bitCount + 1) - 6; - if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) + if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); - Uart.parityBits <<= 1; // make room for the parity bit - Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit + Uart.parityBits <<= 1; // make room for the parity bit + Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit Uart.bitCount = 0; Uart.shiftReg = 0; - if((Uart.len&0x0007) == 0) { // every 8 data bytes - Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits + if((Uart.len&0x0007) == 0) { // every 8 data bytes + Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits Uart.parityBits = 0; } } } } } else { - if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation second half = Sequence X = logic "1" + if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) { // Modulation second half = Sequence X = logic "1" Uart.bitCount++; - Uart.shiftReg = (Uart.shiftReg >> 1) | 0x100; // add a 1 to the shiftreg + Uart.shiftReg = (Uart.shiftReg >> 1) | 0x100; // add a 1 to the shiftreg Uart.state = STATE_MILLER_X; Uart.endTime = Uart.startTime + 8*(9*Uart.len + Uart.bitCount + 1) - 2; - if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) + if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); - Uart.parityBits <<= 1; // make room for the new parity bit - Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit + Uart.parityBits <<= 1; // make room for the new parity bit + Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit Uart.bitCount = 0; Uart.shiftReg = 0; - if ((Uart.len&0x0007) == 0) { // every 8 data bytes - Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits + if ((Uart.len&0x0007) == 0) { // every 8 data bytes + Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits Uart.parityBits = 0; } } - } else { // no modulation in both halves - Sequence Y - if (Uart.state == STATE_MILLER_Z || Uart.state == STATE_MILLER_Y) { // Y after logic "0" - End of Communication + } else { // no modulation in both halves - Sequence Y + if (Uart.state == STATE_MILLER_Z || Uart.state == STATE_MILLER_Y) { // Y after logic "0" - End of Communication LED_B_OFF(); Uart.state = STATE_UNSYNCD; - Uart.bitCount--; // last "0" was part of EOC sequence - Uart.shiftReg <<= 1; // drop it - if(Uart.bitCount > 0) { // if we decoded some bits - Uart.shiftReg >>= (9 - Uart.bitCount); // right align them - Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); // add last byte to the output - Uart.parityBits <<= 1; // add a (void) parity bit - Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align parity bits - Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store it + Uart.bitCount--; // last "0" was part of EOC sequence + Uart.shiftReg <<= 1; // drop it + if(Uart.bitCount > 0) { // if we decoded some bits + Uart.shiftReg >>= (9 - Uart.bitCount); // right align them + Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); // add last byte to the output + Uart.parityBits <<= 1; // add a (void) parity bit + Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align parity bits + Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store it return true; - } else if (Uart.len & 0x0007) { // there are some parity bits to store - Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align remaining parity bits - Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store them + } else if (Uart.len & 0x0007) { // there are some parity bits to store + Uart.parityBits <<= (8 - (Uart.len&0x0007)); // left align remaining parity bits + Uart.parity[Uart.parityLen++] = Uart.parityBits; // and store them } if (Uart.len) { - return true; // we are finished with decoding the raw data sequence + return true; // we are finished with decoding the raw data sequence } else { - UartReset(); // Nothing received - start over + UartReset(); // Nothing received - start over } } - if (Uart.state == STATE_START_OF_COMMUNICATION) { // error - must not follow directly after SOC + if (Uart.state == STATE_START_OF_COMMUNICATION) { // error - must not follow directly after SOC LED_B_OFF(); UartReset(); - } else { // a logic "0" + } else { // a logic "0" Uart.bitCount++; - Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg + Uart.shiftReg = (Uart.shiftReg >> 1); // add a 0 to the shiftreg Uart.state = STATE_MILLER_Y; - if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) + if(Uart.bitCount >= 9) { // if we decoded a full byte (including parity) Uart.output[Uart.len++] = (Uart.shiftReg & 0xff); - Uart.parityBits <<= 1; // make room for the parity bit - Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit + Uart.parityBits <<= 1; // make room for the parity bit + Uart.parityBits |= ((Uart.shiftReg >> 8) & 0x01); // store parity bit Uart.bitCount = 0; Uart.shiftReg = 0; - if ((Uart.len&0x0007) == 0) { // every 8 data bytes - Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits + if ((Uart.len&0x0007) == 0) { // every 8 data bytes + Uart.parity[Uart.parityLen++] = Uart.parityBits; // store 8 parity bits Uart.parityBits = 0; } } } } } - - } - return false; // not finished yet, need more data + } + + return false; // not finished yet, need more data } @@ -428,10 +428,10 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time) // at the reader antenna will be modulated as well. The FPGA detects the modulation for us and would deliver e.g. the following: // ........ 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ....... // The Manchester decoder needs to identify the following sequences: -// 4 ticks modulated followed by 4 ticks unmodulated: Sequence D = 1 (also used as "start of communication") -// 4 ticks unmodulated followed by 4 ticks modulated: Sequence E = 0 -// 8 ticks unmodulated: Sequence F = end of communication -// 8 ticks modulated: A collision. Save the collision position and treat as Sequence D +// 4 ticks modulated followed by 4 ticks unmodulated: Sequence D = 1 (also used as "start of communication") +// 4 ticks unmodulated followed by 4 ticks modulated: Sequence E = 0 +// 8 ticks unmodulated: Sequence F = end of communication +// 8 ticks modulated: A collision. Save the collision position and treat as Sequence D // Note 1: the bitstream may start at any time. We therefore need to sync. // Note 2: parameter offset is used to determine the position of the parity bits (required for the anticollision command only) static tDemod Demod; @@ -450,12 +450,12 @@ const bool Mod_Manchester_LUT[] = { static void DemodReset() { Demod.state = DEMOD_UNSYNCD; - Demod.len = 0; // number of decoded data bytes + Demod.len = 0; // number of decoded data bytes Demod.parityLen = 0; - Demod.shiftReg = 0; // shiftreg to hold decoded data bits - Demod.parityBits = 0; // - Demod.collisionPos = 0; // Position of collision bit - Demod.twoBits = 0xffff; // buffer for 2 Bits + Demod.shiftReg = 0; // shiftreg to hold decoded data bits + Demod.parityBits = 0; // + Demod.collisionPos = 0; // Position of collision bit + Demod.twoBits = 0xffff; // buffer for 2 Bits Demod.highCnt = 0; Demod.startTime = 0; Demod.endTime = 0; @@ -473,18 +473,18 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non { Demod.twoBits = (Demod.twoBits << 8) | bit; - + if (Demod.state == DEMOD_UNSYNCD) { - if (Demod.highCnt < 2) { // wait for a stable unmodulated signal + if (Demod.highCnt < 2) { // wait for a stable unmodulated signal if (Demod.twoBits == 0x0000) { Demod.highCnt++; } else { Demod.highCnt = 0; } } else { - Demod.syncBit = 0xFFFF; // not set - if ((Demod.twoBits & 0x7700) == 0x7000) Demod.syncBit = 7; + Demod.syncBit = 0xFFFF; // not set + if ((Demod.twoBits & 0x7700) == 0x7000) Demod.syncBit = 7; else if ((Demod.twoBits & 0x3B80) == 0x3800) Demod.syncBit = 6; else if ((Demod.twoBits & 0x1DC0) == 0x1C00) Demod.syncBit = 5; else if ((Demod.twoBits & 0x0EE0) == 0x0E00) Demod.syncBit = 4; @@ -495,7 +495,7 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non if (Demod.syncBit != 0xFFFF) { Demod.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8); Demod.startTime -= Demod.syncBit; - Demod.bitCount = offset; // number of decoded data bits + Demod.bitCount = offset; // number of decoded data bits Demod.state = DEMOD_MANCHESTER_DATA; LED_C_ON(); } @@ -503,66 +503,66 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non } else { - if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half - if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // ... and in second half = collision + if (IsManchesterModulationNibble1(Demod.twoBits >> Demod.syncBit)) { // modulation in first half + if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // ... and in second half = collision if (!Demod.collisionPos) { Demod.collisionPos = (Demod.len << 3) + Demod.bitCount; } - } // modulation in first half only - Sequence D = 1 + } // modulation in first half only - Sequence D = 1 Demod.bitCount++; - Demod.shiftReg = (Demod.shiftReg >> 1) | 0x100; // in both cases, add a 1 to the shiftreg - if(Demod.bitCount == 9) { // if we decoded a full byte (including parity) + Demod.shiftReg = (Demod.shiftReg >> 1) | 0x100; // in both cases, add a 1 to the shiftreg + if(Demod.bitCount == 9) { // if we decoded a full byte (including parity) Demod.output[Demod.len++] = (Demod.shiftReg & 0xff); - Demod.parityBits <<= 1; // make room for the parity bit - Demod.parityBits |= ((Demod.shiftReg >> 8) & 0x01); // store parity bit + Demod.parityBits <<= 1; // make room for the parity bit + Demod.parityBits |= ((Demod.shiftReg >> 8) & 0x01); // store parity bit Demod.bitCount = 0; Demod.shiftReg = 0; - if((Demod.len&0x0007) == 0) { // every 8 data bytes - Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits + if((Demod.len&0x0007) == 0) { // every 8 data bytes + Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits Demod.parityBits = 0; } } Demod.endTime = Demod.startTime + 8*(9*Demod.len + Demod.bitCount + 1) - 4; - } else { // no modulation in first half - if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // and modulation in second half = Sequence E = 0 + } else { // no modulation in first half + if (IsManchesterModulationNibble2(Demod.twoBits >> Demod.syncBit)) { // and modulation in second half = Sequence E = 0 Demod.bitCount++; - Demod.shiftReg = (Demod.shiftReg >> 1); // add a 0 to the shiftreg - if(Demod.bitCount >= 9) { // if we decoded a full byte (including parity) + Demod.shiftReg = (Demod.shiftReg >> 1); // add a 0 to the shiftreg + if(Demod.bitCount >= 9) { // if we decoded a full byte (including parity) Demod.output[Demod.len++] = (Demod.shiftReg & 0xff); - Demod.parityBits <<= 1; // make room for the new parity bit + Demod.parityBits <<= 1; // make room for the new parity bit Demod.parityBits |= ((Demod.shiftReg >> 8) & 0x01); // store parity bit Demod.bitCount = 0; Demod.shiftReg = 0; - if ((Demod.len&0x0007) == 0) { // every 8 data bytes - Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits1 + if ((Demod.len&0x0007) == 0) { // every 8 data bytes + Demod.parity[Demod.parityLen++] = Demod.parityBits; // store 8 parity bits1 Demod.parityBits = 0; } } Demod.endTime = Demod.startTime + 8*(9*Demod.len + Demod.bitCount + 1); - } else { // no modulation in both halves - End of communication + } else { // no modulation in both halves - End of communication LED_C_OFF(); - if(Demod.bitCount > 0) { // there are some remaining data bits - Demod.shiftReg >>= (9 - Demod.bitCount); // right align the decoded bits - Demod.output[Demod.len++] = Demod.shiftReg & 0xff; // and add them to the output - Demod.parityBits <<= 1; // add a (void) parity bit - Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits - Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them + if(Demod.bitCount > 0) { // there are some remaining data bits + Demod.shiftReg >>= (9 - Demod.bitCount); // right align the decoded bits + Demod.output[Demod.len++] = Demod.shiftReg & 0xff; // and add them to the output + Demod.parityBits <<= 1; // add a (void) parity bit + Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits + Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them return true; - } else if (Demod.len & 0x0007) { // there are some parity bits to store - Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits - Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them + } else if (Demod.len & 0x0007) { // there are some parity bits to store + Demod.parityBits <<= (8 - (Demod.len&0x0007)); // left align remaining parity bits + Demod.parity[Demod.parityLen++] = Demod.parityBits; // and store them } if (Demod.len) { - return true; // we are finished with decoding the raw data sequence - } else { // nothing received. Start over + return true; // we are finished with decoding the raw data sequence + } else { // nothing received. Start over DemodReset(); } } } - - } - return false; // not finished yet, need more data + } + + return false; // not finished yet, need more data } //============================================================================= @@ -579,7 +579,7 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { // param: // bit 0 - trigger from first card answer // bit 1 - trigger from first reader 7-bit request - + LEDsoff(); LED_A_ON(); @@ -592,11 +592,11 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { // The command (reader -> tag) that we're receiving. uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE); - + // The response (tag -> reader) that we're receiving. uint8_t *receivedResponse = BigBuf_malloc(MAX_FRAME_SIZE); uint8_t *receivedResponsePar = BigBuf_malloc(MAX_PARITY_SIZE); - + // The DMA buffer, used to stream samples from the FPGA uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); @@ -610,26 +610,26 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { int dataLen = 0; bool TagIsActive = false; bool ReaderIsActive = false; - + // Set up the demodulator for tag -> reader responses. DemodInit(receivedResponse, receivedResponsePar); - + // Set up the demodulator for the reader -> tag commands UartInit(receivedCmd, receivedCmdPar); - + // Setup and start DMA. FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); - + // 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 // response from the tag. // triggered == false -- to wait first for card - bool triggered = !(param & 0x03); - - // And now we loop, receiving samples. - for(uint32_t rsamples = 0; true; ) { + bool triggered = !(param & 0x03); - if(BUTTON_PRESS()) { + // And now we loop, receiving samples. + for (uint32_t rsamples = 0; true; ) { + + if (BUTTON_PRESS()) { DbpString("cancelled by button"); break; } @@ -665,9 +665,9 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; } - if (rsamples & 0x01) { // Need two samples to feed Miller and Manchester-Decoder + if (rsamples & 0x01) { // Need two samples to feed Miller and Manchester-Decoder - if(!TagIsActive) { // no need to try decoding reader data if the tag is sending + if(!TagIsActive) { // no need to try decoding reader data if the tag is sending uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4); if (MillerDecoding(readerdata, (rsamples-1)*4)) { // check - if there is a short 7bit request from reader @@ -675,11 +675,11 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { triggered = true; } if(triggered) { - if (!LogTrace(receivedCmd, - Uart.len, + if (!LogTrace(receivedCmd, + Uart.len, Uart.startTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, - Uart.parity, + Uart.parity, true)) break; } /* And ready to receive another command. */ @@ -691,12 +691,12 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { ReaderIsActive = (Uart.state != STATE_UNSYNCD); } - if (!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time + if (!ReaderIsActive) { // no need to try decoding tag data if the reader is sending - and we cannot afford the time uint8_t tagdata = (previous_data << 4) | (*data & 0x0F); if (ManchesterDecoding(tagdata, 0, (rsamples-1)*4)) { - if (!LogTrace(receivedResponse, - Demod.len, - Demod.startTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER, + if (!LogTrace(receivedResponse, + Demod.len, + Demod.startTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER, Demod.endTime*16 - DELAY_TAG_AIR2ARM_AS_SNIFFER, Demod.parity, false)) break; @@ -705,7 +705,7 @@ void RAMFUNC SnoopIso14443a(uint8_t param) { DemodReset(); // And reset the Miller decoder including itS (now outdated) input buffer UartInit(receivedCmd, receivedCmdPar); - } + } TagIsActive = (Demod.state != DEMOD_UNSYNCD); } } @@ -742,16 +742,16 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *par ToSendStuffBit(0); ToSendStuffBit(0); ToSendStuffBit(0); - + // Send startbit ToSend[++ToSendMax] = SEC_D; LastProxToAirDuration = 8 * ToSendMax - 4; - for(uint16_t i = 0; i < len; i++) { + for (uint16_t i = 0; i < len; i++) { uint8_t b = cmd[i]; // Data bits - for(uint16_t j = 0; j < 8; j++) { + for (uint16_t j = 0; j < 8; j++) { if(b & 1) { ToSend[++ToSendMax] = SEC_D; } else { @@ -798,7 +798,7 @@ static void Code4bitAnswerAsTag(uint8_t cmd) ToSend[++ToSendMax] = SEC_D; uint8_t b = cmd; - for(i = 0; i < 4; i++) { + for (i = 0; i < 4; i++) { if(b & 1) { ToSend[++ToSendMax] = SEC_D; LastProxToAirDuration = 8 * ToSendMax - 4; @@ -839,7 +839,7 @@ static void FixLastReaderTraceTime(uint32_t tag_StartTime) { LastReaderTraceTime[3] = (reader_StartTime >> 24) & 0xff; } - + static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Parity, uint32_t ProxToAirDuration) { uint32_t tag_StartTime = LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG; uint32_t tag_EndTime = (LastTimeProxToAirStart + ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG; @@ -855,38 +855,38 @@ static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Pari //----------------------------------------------------------------------------- static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) { - // Set FPGA mode to "simulated ISO 14443 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); + // Set FPGA mode to "simulated ISO 14443 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. + // Now run a `software UART' on the stream of incoming samples. UartInit(received, parity); // clear RXRDY: - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - for(;;) { - WDT_HIT(); + for (;;) { + WDT_HIT(); - if(BUTTON_PRESS()) return false; - - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + if(BUTTON_PRESS()) return false; + + if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; if(MillerDecoding(b, 0)) { *len = Uart.len; EmLogTraceReader(); return true; } - } - } + } + } } int EmSend4bit(uint8_t resp); static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par); -int EmSendCmdEx(uint8_t *resp, uint16_t respLen); +int EmSendCmd(uint8_t *resp, uint16_t respLen); int EmSendPrecompiledCmd(tag_response_info_t *response_info); @@ -901,32 +901,32 @@ static bool prepare_tag_modulation(tag_response_info_t* response_info, size_t ma // ----------- + // 166 bytes, since every bit that needs to be send costs us a byte // - - + + // Prepare the tag modulation bits from the message GetParity(response_info->response, response_info->response_n, &(response_info->par)); CodeIso14443aAsTagPar(response_info->response,response_info->response_n, &(response_info->par)); - + // Make sure we do not exceed the free buffer space if (ToSendMax > max_buffer_size) { - Dbprintf("Out of memory, when modulating bits for tag answer:"); - Dbhexdump(response_info->response_n, response_info->response, false); - return false; + Dbprintf("Out of memory, when modulating bits for tag answer:"); + Dbhexdump(response_info->response_n, response_info->response, false); + return false; } - + // Copy the byte array, used for this modulation to the buffer position memcpy(response_info->modulation, ToSend, ToSendMax); - + // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them response_info->modulation_n = ToSendMax; response_info->ProxToAirDuration = LastProxToAirDuration; - + return true; } // "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit. -// Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) +// Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) // 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits for the modulation // -> need 273 bytes buffer #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273 @@ -935,15 +935,15 @@ bool prepare_allocated_tag_modulation(tag_response_info_t* response_info, uint8_ // Retrieve and store the current buffer index response_info->modulation = *buffer; - + // Forward the prepare tag modulation function to the inner function if (prepare_tag_modulation(response_info, *max_buffer_size)) { - // Update the free buffer offset and the remaining buffer size - *buffer += ToSendMax; + // Update the free buffer offset and the remaining buffer size + *buffer += ToSendMax; *max_buffer_size -= ToSendMax; - return true; + return true; } else { - return false; + return false; } } @@ -957,7 +957,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) // The first response contains the ATQA (note: bytes are transmitted in reverse order). uint8_t response1[2]; - + switch (tagType) { case 1: { // MIFARE Classic // Says: I am Mifare 1k - original line @@ -988,19 +988,19 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) response1[0] = 0x01; response1[1] = 0x0f; sak = 0x01; - } break; + } break; default: { Dbprintf("Error: unkown tagtype (%d)",tagType); return; } break; } - + // The second response contains the (mandatory) first 24 bits of the UID uint8_t response2[5] = {0x00}; // Check if the uid uses the (optional) part uint8_t response2a[5] = {0x00}; - + if (uid_2nd) { response2[0] = 0x88; num_to_bytes(uid_1st,3,response2+1); @@ -1031,8 +1031,8 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce - uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS: - // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, + uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS: + // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, // TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1 // TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us) // TC(1) = 0x02: CID supported, NAD not supported @@ -1061,7 +1061,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) .modulation = dynamic_modulation_buffer, .modulation_n = 0 }; - + // We need to listen to the high-frequency, peak-detected path. iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN); @@ -1097,7 +1097,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) tag_response_info_t* p_response; LED_A_ON(); - for(;;) { + for (;;) { // Clean receive command buffer if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) { DbpString("Button press"); @@ -1105,32 +1105,32 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) } p_response = NULL; - + // Okay, look at the command now. lastorder = order; if(receivedCmd[0] == 0x26) { // Received a REQUEST p_response = &responses[0]; order = 1; } else if(receivedCmd[0] == 0x52) { // Received a WAKEUP p_response = &responses[0]; order = 6; - } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // Received request for UID (cascade 1) + } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // Received request for UID (cascade 1) p_response = &responses[1]; order = 2; - } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x95) { // Received request for UID (cascade 2) + } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x95) { // Received request for UID (cascade 2) p_response = &responses[2]; order = 20; - } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x93) { // Received a SELECT (cascade 1) + } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x93) { // Received a SELECT (cascade 1) p_response = &responses[3]; order = 3; - } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) { // Received a SELECT (cascade 2) + } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) { // Received a SELECT (cascade 2) p_response = &responses[4]; order = 30; - } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ - EmSendCmdEx(data+(4*receivedCmd[1]),16); + } else if(receivedCmd[0] == 0x30) { // Received a (plain) READ + EmSendCmd(data+(4*receivedCmd[1]),16); // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]); // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below p_response = NULL; - } else if(receivedCmd[0] == 0x50) { // Received a HALT + } else if(receivedCmd[0] == 0x50) { // Received a HALT p_response = NULL; - } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) { // Received an authentication request + } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) { // Received an authentication request p_response = &responses[5]; order = 7; - } else if(receivedCmd[0] == 0xE0) { // Received a RATS request - if (tagType == 1 || tagType == 2) { // RATS not supported + } else if(receivedCmd[0] == 0xE0) { // Received a RATS request + if (tagType == 1 || tagType == 2) { // RATS not supported EmSend4bit(CARD_NACK_NA); p_response = NULL; } else { @@ -1164,7 +1164,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) dynamic_response_info.response[0] = receivedCmd[0] ^ 0x11; dynamic_response_info.response_n = 2; } break; - + case 0xBA: { // memcpy(dynamic_response_info.response,"\xAB\x00",2); dynamic_response_info.response_n = 2; @@ -1184,7 +1184,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) dynamic_response_info.response_n = 0; } break; } - + if (dynamic_response_info.response_n > 0) { // Copy the CID from the reader query dynamic_response_info.response[1] = receivedCmd[1]; @@ -1192,7 +1192,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) // Add CRC bytes, always used in ISO 14443A-4 compliant cards AppendCrc14443a(dynamic_response_info.response,dynamic_response_info.response_n); dynamic_response_info.response_n += 2; - + if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) { Dbprintf("Error preparing tag response"); break; @@ -1216,7 +1216,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) if (p_response != NULL) { EmSendPrecompiledCmd(p_response); } - + if (!get_tracing()) { Dbprintf("Trace Full. Simulation stopped."); break; @@ -1236,7 +1236,7 @@ static void PrepareDelayedTransfer(uint16_t delay) uint8_t bitmask = 0; uint8_t bits_to_shift = 0; uint8_t bits_shifted = 0; - + delay &= 0x07; if (delay) { for (uint16_t i = 0; i < delay; i++) { @@ -1257,8 +1257,8 @@ static void PrepareDelayedTransfer(uint16_t delay) // Transmit the command (to the tag) that was placed in ToSend[]. // Parameter timing: // if NULL: transfer at next possible time, taking into account -// request guard time, startup frame guard time and frame delay time -// if == 0: transfer immediately and return time of transfer +// request guard time, startup frame guard time and frame delay time +// if == 0: transfer immediately and return time of transfer // if != 0: delay transfer until time specified //------------------------------------------------------------------------------------- static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing) @@ -1270,25 +1270,25 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing uint32_t ThisTransferTime = 0; if (timing) { - if(*timing == 0) { // Measure time + if(*timing == 0) { // Measure time *timing = (GetCountSspClk() + 8) & 0xfffffff8; } else { - PrepareDelayedTransfer(*timing & 0x00000007); // Delay transfer (fine tuning - up to 7 MF clock ticks) + PrepareDelayedTransfer(*timing & 0x00000007); // Delay transfer (fine tuning - up to 7 MF clock ticks) } if(MF_DBGLEVEL >= 4 && GetCountSspClk() >= (*timing & 0xfffffff8)) Dbprintf("TransmitFor14443a: Missed timing"); - while(GetCountSspClk() < (*timing & 0xfffffff8)); // Delay transfer (multiple of 8 MF clock ticks) + while (GetCountSspClk() < (*timing & 0xfffffff8)); // Delay transfer (multiple of 8 MF clock ticks) LastTimeProxToAirStart = *timing; } else { ThisTransferTime = ((MAX(NextTransferTime, GetCountSspClk()) & 0xfffffff8) + 8); - while(GetCountSspClk() < ThisTransferTime); + while (GetCountSspClk() < ThisTransferTime); LastTimeProxToAirStart = ThisTransferTime; } - + // clear TXRDY AT91C_BASE_SSC->SSC_THR = SEC_Y; uint16_t c = 0; - for(;;) { + for (;;) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = cmd[c]; c++; @@ -1297,7 +1297,7 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing } } } - + NextTransferTime = MAX(NextTransferTime, LastTimeProxToAirStart + REQUEST_GUARD_TIME); LED_B_OFF(); } @@ -1392,76 +1392,93 @@ static void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, cons //----------------------------------------------------------------------------- int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) { + uint32_t field_off_time = -1; + uint32_t samples = 0; + int ret = 0; + uint8_t b = 0;; + uint8_t dmaBuf[DMA_BUFFER_SIZE]; + uint8_t *upTo = dmaBuf; + *len = 0; - uint32_t timer = 0, vtime = 0; - int analogCnt = 0; - int analogAVG = 0; - - // Set ADC to read field strength - AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST; - AT91C_BASE_ADC->ADC_MR = - ADC_MODE_PRESCALE(63) | - ADC_MODE_STARTUP_TIME(1) | - ADC_MODE_SAMPLE_HOLD_TIME(15); - AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF_LOW); - // start ADC - AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; - // Run a 'software UART' on the stream of incoming samples. UartInit(received, parity); + // start ADC + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; + // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN - while (GetCountSspClk() < LastTimeProxToAirStart + LastProxToAirDuration + (FpgaSendQueueDelay>>3)) /* wait */ ; + while (GetCountSspClk() < LastTimeProxToAirStart + LastProxToAirDuration + (FpgaSendQueueDelay>>3) - 8 - 3) /* wait */ ; // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen // only, since we are receiving, not transmitting). FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - - // Clear RXRDY - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; (void)b; + + // clear receive register, measure time of next transfer + uint32_t temp = AT91C_BASE_SSC->SSC_RHR; (void) temp; + while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ; + uint32_t start_time = GetCountSspClk() & 0xfffffff8; + + // Setup and start DMA. + FpgaSetupSscDma(dmaBuf, DMA_BUFFER_SIZE); for(;;) { - WDT_HIT(); + uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (DMA_BUFFER_SIZE-1); - if (BUTTON_PRESS()) return 1; + if (behindBy == 0) continue; - // test if the field exists - if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF_LOW)) { - analogCnt++; - analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF_LOW]; - AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; - if (analogCnt >= 32) { - if ((MAX_ADC_HF_VOLTAGE_LOW * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) { - vtime = GetTickCount(); - if (!timer) timer = vtime; - // 50ms no field --> card to idle state - if (vtime - timer > 50) return 2; - } else - if (timer) timer = 0; - analogCnt = 0; - analogAVG = 0; + b = *upTo++; + + if(upTo >= dmaBuf + 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*DMA_BUFFER_SIZE/10)) { + Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy); + ret = 1; + break; } } + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated. + AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and + AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; // DMA Next Counter registers + } - // receive and test the miller decoding - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - if(MillerDecoding(b, 0)) { - *len = Uart.len; - EmLogTraceReader(); - return 0; + if (BUTTON_PRESS()) { + ret = 1; + break; + } + + // check reader's HF field + if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF_LOW)) { + if ((MAX_ADC_HF_VOLTAGE_LOW * AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF_LOW]) >> 10 < MF_MINFIELDV) { + if (GetTickCount() - field_off_time > 50) { + ret = 2; // reader has switched off HF field for more than 50ms. Timeout + break; + } + } else { + field_off_time = GetTickCount(); // HF field is still there. Reset timer } - } + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; // restart ADC + } + if (MillerDecoding(b, start_time + samples*8)) { + *len = Uart.len; + EmLogTraceReader(); + ret = 0; + break; + } + + samples++; } + + FpgaDisableSscDma(); + return ret; } static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen) { LED_C_ON(); - + uint8_t b; uint16_t i = 0; bool correctionNeeded; @@ -1481,34 +1498,33 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen) correctionNeeded = Uart.parity[(Uart.len-1)/8] & (0x80 >> ((Uart.len-1) & 7)); } - if(correctionNeeded) { + if (correctionNeeded) { // 1236, so correction bit needed i = 0; } else { i = 1; } - // clear receiving shift register and holding register - while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); + // clear receiving shift register and holding register b = AT91C_BASE_SSC->SSC_RHR; (void) b; - while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); + while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); b = AT91C_BASE_SSC->SSC_RHR; (void) b; - + // wait for the FPGA to signal fdt_indicator == 1 (the FPGA is ready to queue new data in its delay line) - for (uint16_t j = 0; j < 5; j++) { // allow timeout - better late than never - while(!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); + for (uint16_t j = 0; j < 5; j++) { // allow timeout - better late than never + while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)); if (AT91C_BASE_SSC->SSC_RHR) break; } LastTimeProxToAirStart = (GetCountSspClk() & 0xfffffff8) + (correctionNeeded?8:0); // send cycle - for(; i < respLen; ) { + for (; i < respLen; ) { if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = resp[i++]; FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR; } - + if(BUTTON_PRESS()) { break; } @@ -1522,7 +1538,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen) int EmSend4bit(uint8_t resp){ Code4bitAnswerAsTag(resp); int res = EmSendCmd14443aRaw(ToSend, ToSendMax); - // do the tracing for the previous reader request and this tag answer: + // Log this tag answer and fix timing of previous reader command: EmLogTraceTag(&resp, 1, NULL, LastProxToAirDuration); return res; } @@ -1531,19 +1547,12 @@ int EmSend4bit(uint8_t resp){ static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par){ CodeIso14443aAsTagPar(resp, respLen, par); int res = EmSendCmd14443aRaw(ToSend, ToSendMax); - // do the tracing for the previous reader request and this tag answer: + // Log this tag answer and fix timing of previous reader command: EmLogTraceTag(resp, respLen, par, LastProxToAirDuration); return res; } -int EmSendCmdEx(uint8_t *resp, uint16_t respLen){ - uint8_t par[MAX_PARITY_SIZE]; - GetParity(resp, respLen, par); - return EmSendCmdExPar(resp, respLen, par); -} - - int EmSendCmd(uint8_t *resp, uint16_t respLen){ uint8_t par[MAX_PARITY_SIZE]; GetParity(resp, respLen, par); @@ -1558,7 +1567,7 @@ int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par){ int EmSendPrecompiledCmd(tag_response_info_t *response_info) { int ret = EmSendCmd14443aRaw(response_info->modulation, response_info->modulation_n); - // do the tracing for the previous reader request and this tag answer: + // Log this tag answer and fix timing of previous reader command: EmLogTraceTag(response_info->response, response_info->response_n, &(response_info->par), response_info->ProxToAirDuration); return ret; } @@ -1572,21 +1581,21 @@ int EmSendPrecompiledCmd(tag_response_info_t *response_info) { static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset) { uint32_t c; - + // Set FPGA mode to "reader listen mode", no modulation (listen // only, since we are receiving, not transmitting). // Signal field is on with the appropriate LED LED_D_ON(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); - + // Now get the answer from the card DemodInit(receivedResponse, receivedResponsePar); // clear RXRDY: - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; + uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; c = 0; - for(;;) { + for (;;) { WDT_HIT(); if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { @@ -1595,7 +1604,7 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive NextTransferTime = MAX(NextTransferTime, Demod.endTime - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/16 + FRAME_DELAY_TIME_PICC_TO_PCD); return true; } else if (c++ > iso14a_timeout && Demod.state == DEMOD_UNSYNCD) { - return false; + return false; } } } @@ -1605,12 +1614,12 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing) { CodeIso14443aBitsAsReaderPar(frame, bits, par); - + // Send command to tag TransmitFor14443a(ToSend, ToSendMax, timing); if(trigger) LED_A_ON(); - + // Log reader command in trace buffer LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, true); } @@ -1659,24 +1668,24 @@ int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity) static void iso14a_set_ATS_times(uint8_t *ats) { uint8_t tb1; - uint8_t fwi, sfgi; + uint8_t fwi, sfgi; uint32_t fwt, sfgt; - - if (ats[0] > 1) { // there is a format byte T0 - if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1) - if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1) + + if (ats[0] > 1) { // there is a format byte T0 + if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1) + if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1) tb1 = ats[3]; } else { tb1 = ats[2]; } - fwi = (tb1 & 0xf0) >> 4; // frame waiting time integer (FWI) + fwi = (tb1 & 0xf0) >> 4; // frame waiting time integer (FWI) if (fwi != 15) { - fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc + fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc iso14a_set_timeout(fwt/(8*16)); } - sfgi = tb1 & 0x0f; // startup frame guard time integer (SFGI) + sfgi = tb1 & 0x0f; // startup frame guard time integer (SFGI) if (sfgi != 0 && sfgi != 15) { - sfgt = 256 * 16 * (1 << sfgi); // startup frame guard time (SFGT) in 1/fc + sfgt = 256 * 16 * (1 << sfgi); // startup frame guard time (SFGT) in 1/fc NextTransferTime = MAX(NextTransferTime, Demod.endTime + (sfgt - DELAY_AIR2ARM_AS_READER - DELAY_ARM2AIR_AS_READER)/16); } } @@ -1686,15 +1695,15 @@ static void iso14a_set_ATS_times(uint8_t *ats) { static int GetATQA(uint8_t *resp, uint8_t *resp_par) { -#define WUPA_RETRY_TIMEOUT 10 // 10ms +#define WUPA_RETRY_TIMEOUT 10 // 10ms uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP uint32_t save_iso14a_timeout = iso14a_get_timeout(); - iso14a_set_timeout(1236/(16*8)+1); // response to WUPA is expected at exactly 1236/fc. No need to wait longer. - + iso14a_set_timeout(1236/(16*8)+1); // response to WUPA is expected at exactly 1236/fc. No need to wait longer. + uint32_t start_time = GetTickCount(); int len; - + // we may need several tries if we did send an unknown command or a wrong authentication before... do { // Broadcast for a card, WUPA (0x52) will force response from all cards in the field @@ -1702,7 +1711,7 @@ static int GetATQA(uint8_t *resp, uint8_t *resp_par) { // Receive the ATQA len = ReaderReceive(resp, resp_par); } while (len == 0 && GetTickCount() <= start_time + WUPA_RETRY_TIMEOUT); - + iso14a_set_timeout(save_iso14a_timeout); return len; } @@ -1711,7 +1720,7 @@ static int GetATQA(uint8_t *resp, uint8_t *resp_par) { // performs iso14443a anticollision (optional) and card select procedure // fills the uid and cuid pointer unless NULL // fills the card info record unless NULL -// if anticollision is false, then the UID must be provided in uid_ptr[] +// if anticollision is false, then the UID must be provided in uid_ptr[] // and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID) // requests ATS unless no_rats is true int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) { @@ -1753,11 +1762,11 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u if ((resp[0] & 0x1F) == 0) { return 3; } - + // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in // which case we need to make a cascade 2 request and select - this is a long UID // While the UID is not complete, the 3rd bit (from the right) is set in the SAK. - for(; sak & 0x04; cascade_level++) { + for (; sak & 0x04; cascade_level++) { // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97) sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2; @@ -1768,21 +1777,21 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u return 0; } - if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit + if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit memset(uid_resp, 0, 4); uint16_t uid_resp_bits = 0; uint16_t collision_answer_offset = 0; // anti-collision-loop: while (Demod.collisionPos) { Dbprintf("Multiple tags detected. Collision after Bit %d", Demod.collisionPos); - for (uint16_t i = collision_answer_offset; i < Demod.collisionPos; i++, uid_resp_bits++) { // add valid UID bits before collision point + for (uint16_t i = collision_answer_offset; i < Demod.collisionPos; i++, uid_resp_bits++) { // add valid UID bits before collision point uint16_t UIDbit = (resp[i/8] >> (i % 8)) & 0x01; uid_resp[uid_resp_bits / 8] |= UIDbit << (uid_resp_bits % 8); } - uid_resp[uid_resp_bits/8] |= 1 << (uid_resp_bits % 8); // next time select the card(s) with a 1 in the collision position + uid_resp[uid_resp_bits/8] |= 1 << (uid_resp_bits % 8); // next time select the card(s) with a 1 in the collision position uid_resp_bits++; // construct anticollosion command: - sel_uid[1] = ((2 + uid_resp_bits/8) << 4) | (uid_resp_bits & 0x07); // length of data in bytes and bits + sel_uid[1] = ((2 + uid_resp_bits/8) << 4) | (uid_resp_bits & 0x07); // length of data in bytes and bits for (uint16_t i = 0; i <= uid_resp_bits/8; i++) { sel_uid[2+i] = uid_resp[i]; } @@ -1798,7 +1807,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u uid_resp[uid_resp_bits/8] |= UIDbit << (uid_resp_bits % 8); } - } else { // no collision, use the response to SELECT_ALL as current uid + } else { // no collision, use the response to SELECT_ALL as current uid memcpy(uid_resp, resp, 4); } } else { @@ -1817,10 +1826,10 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u } // Construct SELECT UID command - sel_uid[1] = 0x70; // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC) - memcpy(sel_uid+2, uid_resp, 4); // the UID received during anticollision, or the provided UID - sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate and add BCC - AppendCrc14443a(sel_uid, 7); // calculate and add CRC + sel_uid[1] = 0x70; // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC) + memcpy(sel_uid+2, uid_resp, 4); // the UID received during anticollision, or the provided UID + sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate and add BCC + AppendCrc14443a(sel_uid, 7); // calculate and add CRC ReaderTransmit(sel_uid, sizeof(sel_uid), NULL); // Receive the SAK @@ -1828,14 +1837,14 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u return 0; } sak = resp[0]; - + // Test if more parts of the uid are coming if ((sak & 0x04) /* && uid_resp[0] == 0x88 */) { // Remove first byte, 0x88 is not an UID byte, it CT, see page 3 of: // http://www.nxp.com/documents/application_note/AN10927.pdf uid_resp[0] = uid_resp[1]; uid_resp[1] = uid_resp[2]; - uid_resp[2] = uid_resp[3]; + uid_resp[2] = uid_resp[3]; uid_resp_len = 3; } @@ -1854,7 +1863,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u } // PICC compilant with iso14443a-4 ---> (SAK & 0x20 != 0) - if( (sak & 0x20) == 0) return 2; + if( (sak & 0x20) == 0) return 2; if (!no_rats) { // Request for answer to select @@ -1875,9 +1884,9 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u // set default timeout and delay next transfer based on ATS iso14a_set_ATS_times(resp); - + } - return 1; + return 1; } @@ -1897,11 +1906,22 @@ void iso14443a_setup(uint8_t fpga_minor_mode) { } FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode); + // Set ADC to read field strength + AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST; + AT91C_BASE_ADC->ADC_MR = + ADC_MODE_PRESCALE(63) | + ADC_MODE_STARTUP_TIME(1) | + ADC_MODE_SAMPLE_HOLD_TIME(15); + AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF_LOW); + // Start the timer StartCountSspClk(); - + DemodReset(); UartReset(); + LastTimeProxToAirStart = 0; + FpgaSendQueueDelay = 0; + LastProxToAirDuration = 20; // arbitrary small value. Avoid lock in EmGetCmd() NextTransferTime = 2*DELAY_ARM2AIR_AS_READER; iso14a_set_timeout(1060); // 10ms default } @@ -1926,17 +1946,17 @@ b8 b7 b6 b5 b4 b3 b2 b1 b5 = ACK/NACK Coding of S-block: b8 b7 b6 b5 b4 b3 b2 b1 -1 1 x x x 0 1 0 +1 1 x x x 0 1 0 b5,b6 = 00 - DESELECT - 11 - WTX -*/ + 11 - WTX +*/ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, uint8_t *res) { uint8_t parity[MAX_PARITY_SIZE]; uint8_t real_cmd[cmd_len + 4]; - + if (cmd_len) { // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02 - real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00) + real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00) if (send_chaining) { real_cmd[0] |= 0x10; } @@ -1945,11 +1965,11 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, u memcpy(real_cmd + 1, cmd, cmd_len); } else { // R-block. ACK - real_cmd[0] = 0xA2; // r-block + ACK + real_cmd[0] = 0xA2; // r-block + ACK real_cmd[0] |= iso14_pcb_blocknum; } AppendCrc14443a(real_cmd, cmd_len + 1); - + ReaderTransmit(real_cmd, cmd_len + 3, NULL); size_t len = ReaderReceive(data, parity); @@ -1957,20 +1977,20 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, u if (!len) { return 0; //DATA LINK ERROR - } else{ - // S-Block WTX - while(len && ((data_bytes[0] & 0xF2) == 0xF2)) { + } else { + // S-Block WTX + while (len && ((data_bytes[0] & 0xF2) == 0xF2)) { uint32_t save_iso14a_timeout = iso14a_get_timeout(); // temporarily increase timeout iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT)); - // Transmit WTX back + // Transmit WTX back // byte1 - WTXM [1..59]. command FWT=FWT*WTXM data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b // now need to fix CRC. AppendCrc14443a(data_bytes, len - 2); // transmit S-Block ReaderTransmit(data_bytes, len, NULL); - // retrieve the result again (with increased timeout) + // retrieve the result again (with increased timeout) len = ReaderReceive(data, parity); data_bytes = data; // restore timeout @@ -1980,13 +2000,13 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, u // if we received an I- or R(ACK)-Block with a block number equal to the // current block number, toggle the current block number if (len >= 3 // PCB+CRC = 3 bytes - && ((data_bytes[0] & 0xC0) == 0 // I-Block - || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0 - && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers + && ((data_bytes[0] & 0xC0) == 0 // I-Block + || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0 + && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers { iso14_pcb_blocknum ^= 1; } - + // if we received I-block with chaining we need to send ACK and receive another block of data if (res) *res = data_bytes[0]; @@ -1995,9 +2015,9 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, u if (len >= 3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) { return -1; } - + } - + if (len) { // cut frame byte len -= 1; @@ -2005,7 +2025,7 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, u for (int i = 0; i < len; i++) data_bytes[i] = data_bytes[i + 1]; } - + return len; } @@ -2025,9 +2045,9 @@ void ReaderIso14443a(UsbCommand *c) byte_t buf[USB_CMD_DATA_SIZE] = {0}; uint8_t par[MAX_PARITY_SIZE]; bool cantSELECT = false; - + set_tracing(true); - + if(param & ISO14A_CLEAR_TRACE) { clear_trace(); } @@ -2078,29 +2098,29 @@ void ReaderIso14443a(UsbCommand *c) len += 2; if (lenbits) lenbits += 16; } - if(lenbits>0) { // want to send a specific number of bits (e.g. short commands) + if(lenbits>0) { // want to send a specific number of bits (e.g. short commands) if(param & ISO14A_TOPAZMODE) { int bits_to_send = lenbits; uint16_t i = 0; - ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity + ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL); // first byte is always short (7bits) and no parity bits_to_send -= 7; while (bits_to_send > 0) { - ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL); // following bytes are 8 bit and no parity + ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL); // following bytes are 8 bit and no parity bits_to_send -= 8; } } else { GetParity(cmd, lenbits/8, par); - ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity + ReaderTransmitBitsPar(cmd, lenbits, par, NULL); // bytes are 8 bit with odd parity } - } else { // want to send complete bytes only + } else { // want to send complete bytes only if(param & ISO14A_TOPAZMODE) { uint16_t i = 0; - ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy + ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL); // first byte: 7 bits, no paritiy while (i < len) { - ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL); // following bytes: 8 bits, no paritiy + ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL); // following bytes: 8 bits, no paritiy } } else { - ReaderTransmit(cmd,len, NULL); // 8 bits, odd parity + ReaderTransmit(cmd,len, NULL); // 8 bits, odd parity } } arg0 = ReaderReceive(buf, par); @@ -2136,14 +2156,14 @@ static int32_t dist_nt(uint32_t nt1, uint32_t nt2) { nttmp1 = nt1; nttmp2 = nt2; - + for (i = 1; i < 32768; i++) { nttmp1 = prng_successor(nttmp1, 1); if (nttmp1 == nt2) return i; nttmp2 = prng_successor(nttmp2, 1); if (nttmp2 == nt1) return -i; } - + return(-99999); // either nt1 or nt2 are invalid nonces } @@ -2165,15 +2185,15 @@ void ReaderMifare(bool first_try) uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); - + // free eventually allocated BigBuf memory. We want all for tracing. BigBuf_free(); - + clear_trace(); set_tracing(true); uint8_t nt_diff = 0; - uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough + uint8_t par[1] = {0}; // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough static uint8_t par_low = 0; bool led_on = true; uint8_t uid[10] ={0}; @@ -2194,10 +2214,10 @@ void ReaderMifare(bool first_try) uint16_t consecutive_resyncs = 0; int isOK = 0; - if (first_try) { + if (first_try) { mf_nr_ar3 = 0; par[0] = par_low = 0; - sync_cycles = PRNG_SEQUENCE_LENGTH; // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the tag nonces). + sync_cycles = PRNG_SEQUENCE_LENGTH; // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the tag nonces). nt_attacked = 0; } else { @@ -2210,13 +2230,13 @@ void ReaderMifare(bool first_try) LED_A_ON(); LED_B_OFF(); LED_C_OFF(); - - #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up. - #define MAX_SYNC_TRIES 32 - #define SYNC_TIME_BUFFER 16 // if there is only SYNC_TIME_BUFFER left before next planned sync, wait for next PRNG cycle - #define NUM_DEBUG_INFOS 8 // per strategy - #define MAX_STRATEGY 3 + + #define MAX_UNEXPECTED_RANDOM 4 // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up. + #define MAX_SYNC_TRIES 32 + #define SYNC_TIME_BUFFER 16 // if there is only SYNC_TIME_BUFFER left before next planned sync, wait for next PRNG cycle + #define NUM_DEBUG_INFOS 8 // per strategy + #define MAX_STRATEGY 3 uint16_t unexpected_random = 0; uint16_t sync_tries = 0; int16_t debug_info_nr = -1; @@ -2224,9 +2244,9 @@ void ReaderMifare(bool first_try) int32_t debug_info[MAX_STRATEGY][NUM_DEBUG_INFOS]; uint32_t select_time; uint32_t halt_time; - - for(uint16_t i = 0; true; i++) { - + + for (uint16_t i = 0; true; i++) { + LED_C_ON(); WDT_HIT(); @@ -2235,7 +2255,7 @@ void ReaderMifare(bool first_try) isOK = -1; break; } - + if (strategy == 2) { // test with additional hlt command halt_time = 0; @@ -2252,9 +2272,9 @@ void ReaderMifare(bool first_try) iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); SpinDelay(100); } - + if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card"); + if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Can't select card"); continue; } select_time = GetCountSspClk(); @@ -2270,11 +2290,11 @@ void ReaderMifare(bool first_try) sync_time = (sync_time & 0xfffffff8) + sync_cycles; } - // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) + // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time); } else { // collect some information on tag nonces for debugging: - #define DEBUG_FIXED_SYNC_CYCLES PRNG_SEQUENCE_LENGTH + #define DEBUG_FIXED_SYNC_CYCLES PRNG_SEQUENCE_LENGTH if (strategy == 0) { // nonce distances at fixed time after card select: sync_time = select_time + DEBUG_FIXED_SYNC_CYCLES; @@ -2289,11 +2309,11 @@ void ReaderMifare(bool first_try) sync_time = DEBUG_FIXED_SYNC_CYCLES; } ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time); - } + } // Receive the (4 Byte) "random" nonce if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Couldn't receive tag nonce"); + if (MF_DBGLEVEL >= 1) Dbprintf("Mifare: Couldn't receive tag nonce"); continue; } @@ -2311,17 +2331,17 @@ void ReaderMifare(bool first_try) if (nt_distance == -99999) { // invalid nonce received unexpected_random++; if (unexpected_random > MAX_UNEXPECTED_RANDOM) { - isOK = -3; // Card has an unpredictable PRNG. Give up + isOK = -3; // Card has an unpredictable PRNG. Give up break; } else { - continue; // continue trying... + continue; // continue trying... } } if (++sync_tries > MAX_SYNC_TRIES) { if (strategy > MAX_STRATEGY || MF_DBGLEVEL < 3) { - isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly + isOK = -4; // Card's PRNG runs at an unexpected frequency or resets unexpectedly break; - } else { // continue for a while, just to collect some debug info + } else { // continue for a while, just to collect some debug info debug_info[strategy][debug_info_nr] = nt_distance; debug_info_nr++; if (debug_info_nr == NUM_DEBUG_INFOS) { @@ -2342,9 +2362,9 @@ void ReaderMifare(bool first_try) } } - if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again... + if ((nt != nt_attacked) && nt_attacked) { // we somehow lost sync. Try to catch up again... catch_up_cycles = -dist_nt(nt_attacked, nt); - if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one. + if (catch_up_cycles == 99999) { // invalid nonce received. Don't resync on that one. catch_up_cycles = 0; continue; } @@ -2354,12 +2374,12 @@ void ReaderMifare(bool first_try) } else { last_catch_up = catch_up_cycles; - consecutive_resyncs = 0; + consecutive_resyncs = 0; } if (consecutive_resyncs < 3) { if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d. nt_distance=%d. Consecutive Resyncs = %d. Trying one time catch up...\n", i, -catch_up_cycles, consecutive_resyncs); } - else { + else { sync_cycles = sync_cycles + catch_up_cycles; if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles); last_catch_up = 0; @@ -2368,13 +2388,13 @@ void ReaderMifare(bool first_try) } continue; } - + consecutive_resyncs = 0; - + // Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding if (ReaderReceive(receivedAnswer, receivedAnswerPar)) { - catch_up_cycles = 8; // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer - + catch_up_cycles = 8; // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer + if (nt_diff == 0) { par_low = par[0] & 0xE0; // there is no need to check all parities for other nt_diff. Parity Bits for mf_nr_ar[0..2] won't change } @@ -2398,7 +2418,7 @@ void ReaderMifare(bool first_try) if (nt_diff == 0 && first_try) { par[0]++; - if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK. + if (par[0] == 0x00) { // tried all 256 possible parities without success. Card doesn't send NACK. isOK = -2; break; } @@ -2414,13 +2434,13 @@ void ReaderMifare(bool first_try) if (isOK == -4) { if (MF_DBGLEVEL >= 3) { for (uint16_t i = 0; i <= MAX_STRATEGY; i++) { - for(uint16_t j = 0; j < NUM_DEBUG_INFOS; j++) { + for (uint16_t j = 0; j < NUM_DEBUG_INFOS; j++) { Dbprintf("collected debug info[%d][%d] = %d", i, j, debug_info[i][j]); } } } } - + FpgaDisableTracing(); uint8_t buf[32]; @@ -2429,7 +2449,7 @@ void ReaderMifare(bool first_try) memcpy(buf + 8, par_list, 8); memcpy(buf + 16, ks_list, 8); memcpy(buf + 24, mf_nr_ar, 8); - + cmd_send(CMD_ACK, isOK, 0, 0, buf, 32); // Thats it... @@ -2441,8 +2461,8 @@ void ReaderMifare(bool first_try) //----------------------------------------------------------------------------- -// MIFARE sniffer. -// +// MIFARE sniffer. +// //----------------------------------------------------------------------------- void RAMFUNC SniffMifare(uint8_t param) { // param: @@ -2452,7 +2472,7 @@ void RAMFUNC SniffMifare(uint8_t param) { // C(red) A(yellow) B(green) LEDsoff(); LED_A_ON(); - + // init trace buffer clear_trace(); set_tracing(true); @@ -2492,19 +2512,19 @@ void RAMFUNC SniffMifare(uint8_t param) { MfSniffInit(); // And now we loop, receiving samples. - for(uint32_t sniffCounter = 0; true; ) { - + for (uint32_t sniffCounter = 0; true; ) { + if(BUTTON_PRESS()) { DbpString("Canceled by button."); break; } WDT_HIT(); - - if ((sniffCounter & 0x0000FFFF) == 0) { // from time to time + + if ((sniffCounter & 0x0000FFFF) == 0) { // from time to time // check if a transaction is completed (timeout after 2000ms). // if yes, stop the DMA transfer and send what we have so far to the client - if (MfSniffSend(2000)) { + if (MfSniffSend(2000)) { // Reset everything - we missed some sniffed data anyway while the DMA was stopped sniffCounter = 0; data = dmaBuf; @@ -2514,17 +2534,17 @@ void RAMFUNC SniffMifare(uint8_t param) { FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer. } } - - int register readBufDataP = data - dmaBuf; // number of bytes we have processed so far + + int register readBufDataP = data - dmaBuf; // number of bytes we have processed so far int register dmaBufDataP = DMA_BUFFER_SIZE - AT91C_BASE_PDC_SSC->PDC_RCR; // number of bytes already transferred - if (readBufDataP <= dmaBufDataP){ // we are processing the same block of data which is currently being transferred - dataLen = dmaBufDataP - readBufDataP; // number of bytes still to be processed - } else { + if (readBufDataP <= dmaBufDataP){ // we are processing the same block of data which is currently being transferred + dataLen = dmaBufDataP - readBufDataP; // number of bytes still to be processed + } else { dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP; // number of bytes still to be processed } // test for length of buffer - if(dataLen > maxDataLen) { // we are more behind than ever... - maxDataLen = dataLen; + if(dataLen > maxDataLen) { // we are more behind than ever... + maxDataLen = dataLen; if(dataLen > (9 * DMA_BUFFER_SIZE / 10)) { Dbprintf("blew circular buffer! dataLen=0x%x", dataLen); break; @@ -2546,7 +2566,7 @@ void RAMFUNC SniffMifare(uint8_t param) { if (sniffCounter & 0x01) { - if(!TagIsActive) { // no need to try decoding tag data if the reader is sending + if(!TagIsActive) { // no need to try decoding tag data if the reader is sending uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4); if(MillerDecoding(readerdata, (sniffCounter-1)*4)) { @@ -2554,14 +2574,14 @@ void RAMFUNC SniffMifare(uint8_t param) { /* And ready to receive another command. */ UartInit(receivedCmd, receivedCmdPar); - + /* And also reset the demod code */ DemodReset(); } ReaderIsActive = (Uart.state != STATE_UNSYNCD); } - - if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending + + if(!ReaderIsActive) { // no need to try decoding tag data if the reader is sending uint8_t tagdata = (previous_data << 4) | (*data & 0x0F); if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) { @@ -2592,6 +2612,6 @@ void RAMFUNC SniffMifare(uint8_t param) { DbpString("COMMAND FINISHED."); MfSniffEnd(); - + Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len); } diff --git a/armsrc/iso14443a.h b/armsrc/iso14443a.h index 6954a29b..df2dcbea 100644 --- a/armsrc/iso14443a.h +++ b/armsrc/iso14443a.h @@ -41,7 +41,6 @@ extern void ReaderMifare(bool first_try); extern int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity); extern int EmSendCmd(uint8_t *resp, uint16_t respLen); -extern int EmSendCmdEx(uint8_t *resp, uint16_t respLen); extern int EmSend4bit(uint8_t resp); extern int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par); extern int EmSendPrecompiledCmd(tag_response_info_t *response_info); diff --git a/armsrc/mifaresim.c b/armsrc/mifaresim.c index 15d96cf8..6f97e1b4 100644 --- a/armsrc/mifaresim.c +++ b/armsrc/mifaresim.c @@ -25,19 +25,19 @@ #include "apps.h" //mifare emulator states -#define MFEMUL_NOFIELD 0 -#define MFEMUL_IDLE 1 -#define MFEMUL_SELECT1 2 -#define MFEMUL_SELECT2 3 -#define MFEMUL_SELECT3 4 -#define MFEMUL_AUTH1 5 -#define MFEMUL_AUTH2 6 -#define MFEMUL_WORK 7 -#define MFEMUL_WRITEBL2 8 -#define MFEMUL_INTREG_INC 9 -#define MFEMUL_INTREG_DEC 10 -#define MFEMUL_INTREG_REST 11 -#define MFEMUL_HALTED 12 +#define MFEMUL_NOFIELD 0 +#define MFEMUL_IDLE 1 +#define MFEMUL_SELECT1 2 +#define MFEMUL_SELECT2 3 +#define MFEMUL_SELECT3 4 +#define MFEMUL_AUTH1 5 +#define MFEMUL_AUTH2 6 +#define MFEMUL_WORK 7 +#define MFEMUL_WRITEBL2 8 +#define MFEMUL_INTREG_INC 9 +#define MFEMUL_INTREG_DEC 10 +#define MFEMUL_INTREG_REST 11 +#define MFEMUL_HALTED 12 #define AC_DATA_READ 0 #define AC_DATA_WRITE 1 @@ -277,7 +277,7 @@ static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t ** }; // Prepare ("precompile") the responses of the anticollision phase. There will be not enough time to do this at the moment the reader sends its REQA or SELECT - // There are 7 predefined responses with a total of 18 bytes data to transmit. Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) + // There are 5 predefined responses with a total of 18 bytes data to transmit. Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) // 18 * 8 data bits, 18 * 1 parity bits, 5 start bits, 5 stop bits, 5 correction bits -> need 177 bytes buffer #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 177 // number of bytes required for precompiled responses @@ -313,7 +313,6 @@ static bool HasValidCRC(uint8_t *receivedCmd, uint16_t receivedCmd_len) { * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that - * FLAG_10B_UID_IN_DATA - use 10-byte UID in the data-section not finished * FLAG_NR_AR_ATTACK - means we should collect NR_AR responses for bruteforcing later * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack) *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ... @@ -335,18 +334,15 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t uint32_t cardINTREG = 0; uint8_t cardINTBLOCK = 0; struct Crypto1State mpcs = {0, 0}; - struct Crypto1State *pcs; - pcs = &mpcs; - uint32_t numReads = 0;//Counts numer of times reader reads a block + struct Crypto1State *pcs = &mpcs; + uint32_t numReads = 0; //Counts numer of times reader reads a block uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedCmd_dec[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE]; uint16_t receivedCmd_len; uint8_t response[MAX_MIFARE_FRAME_SIZE]; uint8_t response_par[MAX_MIFARE_PARITY_SIZE]; - - uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04}; - uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00}; + uint8_t fixed_nonce[] = {0x01, 0x02, 0x03, 0x04}; int num_blocks = ParamCardSizeBlocks(cardsize); @@ -371,7 +367,7 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t if (flags & FLAG_RANDOM_NONCE) { nonce = prand(); } else { - nonce = bytes_to_num(rAUTH_NT, 4); + nonce = bytes_to_num(fixed_nonce, 4); } // free eventually allocated BigBuf memory but keep Emulator Memory @@ -394,8 +390,8 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t while (!button_pushed && !finished && !usb_poll_validate_length()) { WDT_HIT(); - // find reader field if (cardSTATE == MFEMUL_NOFIELD) { + // wait for reader HF field int vHf = (MAX_ADC_HF_VOLTAGE_LOW * AvgAdc(ADC_CHAN_HF_LOW)) >> 10; if (vHf > MF_MINFIELDV) { LED_D_ON(); @@ -409,7 +405,7 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t FpgaEnableTracing(); int res = EmGetCmd(receivedCmd, &receivedCmd_len, receivedCmd_par); - if (res == 2) { //Field is off! + if (res == 2) { // Reader has dropped the HF field. Power off. FpgaDisableTracing(); LED_D_OFF(); cardSTATE = MFEMUL_NOFIELD; @@ -522,8 +518,8 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY)); if (!encrypted_data) { // first authentication crypto1_word(pcs, cuid ^ nonce, 0); // Update crypto state - num_to_bytes(nonce, 4, rAUTH_AT); // Send unencrypted nonce - EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT)); + num_to_bytes(nonce, 4, response); // Send unencrypted nonce + EmSendCmd(response, sizeof(nonce)); FpgaDisableTracing(); if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d", receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY); } else { // nested authentication @@ -545,7 +541,7 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t cardSTATE = MFEMUL_HALTED; break; } - + if(receivedCmd_dec[0] == ISO14443A_CMD_READBLOCK || receivedCmd_dec[0] == ISO14443A_CMD_WRITEBLOCK || receivedCmd_dec[0] == MIFARE_CMD_INC @@ -645,8 +641,10 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t } // command not allowed - if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Received command not allowed, nacking"); EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA)); + FpgaDisableTracing(); + if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Received command not allowed, nacking"); + cardSTATE = MFEMUL_IDLE; break; } @@ -727,6 +725,7 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t // test if auth OK if (cardRr != prng_successor(nonce, 64)){ + FpgaDisableTracing(); if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x", cardAUTHSC, cardAUTHKEY == AUTHKEYA ? 'A' : 'B', cardRr, prng_successor(nonce, 64)); @@ -787,8 +786,8 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t break; } cardINTREG = cardINTREG + ans; + cardSTATE = MFEMUL_WORK; } - cardSTATE = MFEMUL_WORK; break; } @@ -800,9 +799,9 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t cardSTATE = MFEMUL_IDLE; break; } + cardINTREG = cardINTREG - ans; + cardSTATE = MFEMUL_WORK; } - cardINTREG = cardINTREG - ans; - cardSTATE = MFEMUL_WORK; break; } @@ -818,6 +817,7 @@ void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t } } // end of switch + FpgaDisableTracing(); button_pushed = BUTTON_PRESS(); diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c index 5ffdd60a..36e29721 100644 --- a/armsrc/mifareutil.c +++ b/armsrc/mifareutil.c @@ -27,9 +27,9 @@ int MF_DBGLEVEL = MF_DBG_INFO; // crypto1 helpers void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){ - uint8_t bt = 0; + uint8_t bt = 0; int i; - + if (len != 1) { for (i = 0; i < len; i++) data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i]; @@ -37,7 +37,7 @@ void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, u bt = 0; for (i = 0; i < 4; i++) bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i; - + data_out[0] = bt; } return; @@ -51,14 +51,14 @@ void mf_crypto1_encryptEx(struct Crypto1State *pcs, uint8_t *data, uint8_t *in, uint8_t bt = 0; int i; par[0] = 0; - + for (i = 0; i < len; i++) { bt = data[i]; data[i] = crypto1_byte(pcs, in==NULL?0x00:in[i], 0) ^ data[i]; - if((i&0x0007) == 0) + if((i&0x0007) == 0) par[i>>3] = 0; par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007))); - } + } return; } @@ -72,7 +72,7 @@ uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) { for (i = 0; i < 4; i++) bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i; - + return bt; } @@ -98,20 +98,20 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, { uint8_t dcmd[4], ecmd[4]; uint16_t pos, res; - uint8_t par[1]; // 1 Byte parity is enough here + uint8_t par[1]; // 1 Byte parity is enough here dcmd[0] = cmd; dcmd[1] = data; AppendCrc14443a(dcmd, 2); - + memcpy(ecmd, dcmd, sizeof(dcmd)); - + if (crypted) { par[0] = 0; for (pos = 0; pos < 4; pos++) { ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos]; par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos)); - } + } ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing); @@ -120,17 +120,17 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, } int len = ReaderReceive(answer, par); - + if (answer_parity) *answer_parity = par[0]; - + if (crypted == CRYPT_ALL) { if (len == 1) { res = 0; for (pos = 0; pos < 4; pos++) res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos; - + answer[0] = res; - + } else { for (pos = 0; pos < len; pos++) { @@ -138,41 +138,41 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, } } } - + return len; } // mifare classic commands -int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested) +int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested) { return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL, NULL); } -int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing) +int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint8_t isNested, uint32_t *ntptr, uint32_t *timing) { // variables - int len; + int len; uint32_t pos; uint8_t tmp4[4]; uint8_t par[1] = {0x00}; byte_t nr[4]; uint32_t nt, ntpp; // Supplied tag nonce - + uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; - + // Transmit MIFARE_CLASSIC_AUTH len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer, receivedAnswerPar, timing); - if (MF_DBGLEVEL >= 4) Dbprintf("rand tag nonce len: %x", len); + if (MF_DBGLEVEL >= 4) Dbprintf("rand tag nonce len: %x", len); if (len != 4) return 1; - + // "random" reader nonce: nr[0] = 0x55; nr[1] = 0x41; nr[2] = 0x49; - nr[3] = 0x92; - + nr[3] = 0x92; + // Save the tag nonce (nt) nt = bytes_to_num(receivedAnswer, 4); @@ -184,7 +184,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN crypto1_create(pcs, ui64Key); if (isNested == AUTH_NESTED) { - // decrypt nt with help of new key + // decrypt nt with help of new key nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt; } else { // Load (plain) uid^nt into the cipher @@ -193,8 +193,8 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN // some statistic if (!ntptr && (MF_DBGLEVEL >= 3)) - Dbprintf("auth uid: %08x nt: %08x", uid, nt); - + Dbprintf("auth uid: %08x nt: %08x", uid, nt); + // save Nt if (ntptr) *ntptr = nt; @@ -205,8 +205,8 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN { mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos]; par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos)); - } - + } + // Skip 32 bits in pseudo random generator nt = prng_successor(nt,32); @@ -216,8 +216,8 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN nt = prng_successor(nt,8); mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff); par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos)); - } - + } + // Transmit reader nonce and reader answer ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL); @@ -225,48 +225,48 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN len = ReaderReceive(receivedAnswer, receivedAnswerPar); if (!len) { - if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout."); + if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout."); return 2; } - + memcpy(tmp4, receivedAnswer, 4); ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0); - + if (ntpp != bytes_to_num(tmp4, 4)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response."); + if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response."); return 3; } return 0; } -int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) +int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) { // variables - int len; - uint8_t bt[2]; - + int len; + uint8_t bt[2]; + uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; - + // command MIFARE_CLASSIC_READBLOCK len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL); if (len == 1) { - if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); + if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); return 1; } if (len != 18) { - if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len); + if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len); return 2; } memcpy(bt, receivedAnswer + 16, 2); AppendCrc14443a(receivedAnswer, 16); if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) { - if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error."); + if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error."); return 3; } - + memcpy(blockData, receivedAnswer, 16); return 0; } @@ -281,7 +281,7 @@ int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){ memcpy(key, keybytes, 4); if (MF_DBGLEVEL >= MF_DBG_EXTENDED) - Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]); + Dbprintf("EV1 Auth : %02x%02x%02x%02x", key[0], key[1], key[2], key[3]); len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL); //len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL); if (len != 4) { @@ -326,12 +326,12 @@ int mifare_ultra_auth(uint8_t *keybytes){ // decrypt nonce. // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV ); mbedtls_des3_set2key_dec(&ctx, key); - mbedtls_des3_crypt_cbc(&ctx // des3_context - , MBEDTLS_DES_DECRYPT // int mode - , sizeof(random_b) // length - , IV // iv[8] - , enc_random_b // input - , random_b // output + mbedtls_des3_crypt_cbc(&ctx // des3_context + , MBEDTLS_DES_DECRYPT // int mode + , sizeof(random_b) // length + , IV // iv[8] + , enc_random_b // input + , random_b // output ); rol(random_b,8); @@ -355,12 +355,12 @@ int mifare_ultra_auth(uint8_t *keybytes){ // encrypt out, in, length, key, iv //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b); mbedtls_des3_set2key_enc(&ctx, key); - mbedtls_des3_crypt_cbc(&ctx // des3_context - , MBEDTLS_DES_ENCRYPT // int mode - , sizeof(rnd_ab) // length - , enc_random_b // iv[8] - , rnd_ab // input - , rnd_ab // output + mbedtls_des3_crypt_cbc(&ctx // des3_context + , MBEDTLS_DES_ENCRYPT // int mode + , sizeof(rnd_ab) // length + , enc_random_b // iv[8] + , rnd_ab // input + , rnd_ab // output ); //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL); @@ -374,15 +374,15 @@ int mifare_ultra_auth(uint8_t *keybytes){ uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 }; memcpy(enc_resp, resp+1, 8); - // decrypt out, in, length, key, iv + // decrypt out, in, length, key, iv // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b); mbedtls_des3_set2key_dec(&ctx, key); - mbedtls_des3_crypt_cbc(&ctx // des3_context - , MBEDTLS_DES_DECRYPT // int mode - , 8 // length - , enc_random_b // iv[8] - , enc_resp // input - , resp_random_a // output + mbedtls_des3_crypt_cbc(&ctx // des3_context + , MBEDTLS_DES_DECRYPT // int mode + , 8 // length + , enc_random_b // iv[8] + , enc_resp // input + , resp_random_a // output ); if ( memcmp(resp_random_a, random_a, 8) != 0 ) { if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication"); @@ -390,7 +390,7 @@ int mifare_ultra_auth(uint8_t *keybytes){ } if (MF_DBGLEVEL >= MF_DBG_EXTENDED) { - Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", + Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3], rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]); @@ -414,7 +414,7 @@ int mifare_ultra_auth(uint8_t *keybytes){ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) { uint16_t len; - uint8_t bt[2]; + uint8_t bt[2]; uint8_t receivedAnswer[MAX_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_PARITY_SIZE]; uint8_t retries; @@ -455,55 +455,55 @@ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) return 0; } -int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) +int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) { // variables - uint16_t len, i; + uint16_t len, i; uint32_t pos; - uint8_t par[3] = {0}; // enough for 18 Bytes to send + uint8_t par[3] = {0}; // enough for 18 Bytes to send byte_t res; - + uint8_t d_block[18], d_block_enc[18]; uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; - + // command MIFARE_CLASSIC_WRITEBLOCK len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL); if ((len != 1) || (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK - if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); + if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); return 1; } - + memcpy(d_block, blockData, 16); AppendCrc14443a(d_block, 16); - + // crypto for (pos = 0; pos < 18; pos++) { d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos]; par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007))); - } + } ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL); // Receive the response - len = ReaderReceive(receivedAnswer, receivedAnswerPar); + len = ReaderReceive(receivedAnswer, receivedAnswerPar); res = 0; for (i = 0; i < 4; i++) res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i; if ((len != 1) || (res != 0x0A)) { - if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res); + if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res); return 2; } - + return 0; } /* // command not needed, but left for future testing -int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData) +int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData) { uint16_t len; uint8_t par[3] = {0}; // enough for 18 parity bits @@ -557,16 +557,16 @@ int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData) return 0; } -int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) +int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) { - uint16_t len; + uint16_t len; uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; len = mifare_sendcmd_short(pcs, pcs == NULL ? false:true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL); if (len != 0) { if (MF_DBGLEVEL >= MF_DBG_ERROR) - Dbprintf("halt error. response len: %x", len); + Dbprintf("halt error. response len: %x", len); return 1; } @@ -578,7 +578,7 @@ int mifare_ultra_halt() uint16_t len; uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; - + len = mifare_sendcmd_short(NULL, true, 0x50, 0x00, receivedAnswer, receivedAnswerPar, NULL); if (len != 0) { if (MF_DBGLEVEL >= MF_DBG_ERROR) @@ -591,21 +591,21 @@ int mifare_ultra_halt() // Mifare Memory Structure: up to 32 Sectors with 4 blocks each (1k and 2k cards), // plus evtl. 8 sectors with 16 blocks each (4k cards) -uint8_t NumBlocksPerSector(uint8_t sectorNo) +uint8_t NumBlocksPerSector(uint8_t sectorNo) { - if (sectorNo < 32) + if (sectorNo < 32) return 4; else return 16; } -uint8_t FirstBlockOfSector(uint8_t sectorNo) +uint8_t FirstBlockOfSector(uint8_t sectorNo) { if (sectorNo < 32) return sectorNo * 4; else return 32*4 + (sectorNo - 32) * 16; - + } uint8_t SectorTrailer(uint8_t blockNo) @@ -648,7 +648,7 @@ int emlCheckValBl(int blockNum) { (data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) || (data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) || (data[12] != (data[15] ^ 0xff)) - ) + ) return 1; return 0; } @@ -656,11 +656,11 @@ int emlCheckValBl(int blockNum) { int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) { uint8_t* emCARD = BigBuf_get_EM_addr(); uint8_t* data = emCARD + blockNum * 16; - + if (emlCheckValBl(blockNum)) { return 1; } - + memcpy(blReg, data, 4); *blBlock = data[12]; return 0; @@ -669,41 +669,41 @@ int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) { int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) { uint8_t* emCARD = BigBuf_get_EM_addr(); uint8_t* data = emCARD + blockNum * 16; - + memcpy(data + 0, &blReg, 4); memcpy(data + 8, &blReg, 4); blReg = blReg ^ 0xffffffff; memcpy(data + 4, &blReg, 4); - + data[12] = blBlock; data[13] = blBlock ^ 0xff; data[14] = blBlock; data[15] = blBlock ^ 0xff; - + return 0; } uint64_t emlGetKey(int sectorNum, int keyType) { uint8_t key[6]; uint8_t* emCARD = BigBuf_get_EM_addr(); - + memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6); return bytes_to_num(key, 6); } void emlClearMem(void) { int b; - + const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; const uint8_t uid[] = {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04}; uint8_t* emCARD = BigBuf_get_EM_addr(); - + memset(emCARD, 0, CARD_MEMORY_SIZE); - + // fill sectors trailer data for(b = 3; b < 256; b<127?(b+=4):(b+=16)) { emlSetMem((uint8_t *)trailer, b , 1); - } + } // uid emlSetMem((uint8_t *)uid, 0, 1); @@ -714,35 +714,35 @@ void emlClearMem(void) { // Mifare desfire commands int mifare_sendcmd_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing) { - uint8_t dcmd[5] = {0x00}; - dcmd[0] = cmd; - memcpy(dcmd+1,data,2); + uint8_t dcmd[5] = {0x00}; + dcmd[0] = cmd; + memcpy(dcmd+1,data,2); AppendCrc14443a(dcmd, 3); - + ReaderTransmit(dcmd, sizeof(dcmd), NULL); int len = ReaderReceive(answer, answer_parity); if(!len) { - if (MF_DBGLEVEL >= MF_DBG_ERROR) + if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed. Card timeout."); return 1; - } + } return len; } int mifare_sendcmd_special2(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer,uint8_t *answer_parity, uint32_t *timing) { - uint8_t dcmd[20] = {0x00}; - dcmd[0] = cmd; - memcpy(dcmd+1,data,17); + uint8_t dcmd[20] = {0x00}; + dcmd[0] = cmd; + memcpy(dcmd+1,data,17); AppendCrc14443a(dcmd, 18); ReaderTransmit(dcmd, sizeof(dcmd), NULL); int len = ReaderReceive(answer, answer_parity); if(!len){ - if (MF_DBGLEVEL >= MF_DBG_ERROR) + if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed. Card timeout."); return 1; - } + } return len; } @@ -753,23 +753,23 @@ int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){ uint8_t data[2]={0x0a, 0x00}; uint8_t receivedAnswer[MAX_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_PARITY_SIZE]; - + len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL); if (len == 1) { if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); return 1; } - + if (len == 12) { - if (MF_DBGLEVEL >= MF_DBG_EXTENDED) { + if (MF_DBGLEVEL >= MF_DBG_EXTENDED) { Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4], receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9], receivedAnswer[10],receivedAnswer[11]); } memcpy(blockData, receivedAnswer, 12); - return 0; + return 0; } return 1; } @@ -780,18 +780,18 @@ int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){ uint8_t data[17] = {0x00}; data[0] = 0xAF; memcpy(data+1,key,16); - + uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE]; - + len = mifare_sendcmd_special2(NULL, 1, 0x03, data, receivedAnswer, receivedAnswerPar ,NULL); - + if ((receivedAnswer[0] == 0x03) && (receivedAnswer[1] == 0xae)) { if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Auth Error: %02x %02x", receivedAnswer[0], receivedAnswer[1]); return 1; } - + if (len == 12){ if (MF_DBGLEVEL >= MF_DBG_EXTENDED) { Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", @@ -820,7 +820,7 @@ int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uin if (*cascade_levels == 0) { // need a full select cycle to get the uid first iso14a_card_select_t card_info; if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) { - if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card"); + if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card"); return 1; } switch (card_info.uidlen) { @@ -831,26 +831,26 @@ int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uin } } else { // no need for anticollision. We can directly select the card if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) { - if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels); + if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels); return 1; } } - + if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) { -// SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout() +// SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout() return 2; } else { -/* // let it be here. it like halt command, but maybe it will work in some strange cases +/* // let it be here. it like halt command, but maybe it will work in some strange cases uint8_t dummy_answer = 0; ReaderTransmit(&dummy_answer, 1, NULL); - int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT; + int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT; // wait for the card to become ready again while(GetCountSspClk() < timeout) {}; */ // it needs after success authentication mifare_classic_halt(pcs, *cuid); } - + return 0; } @@ -865,14 +865,14 @@ int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t for (uint8_t i = 0; i < keyCount; i++) { // Allow button press / usb cmd to interrupt device - if (BUTTON_PRESS() && !usb_poll_validate_length()) { + if (BUTTON_PRESS() && !usb_poll_validate_length()) { Dbprintf("ChkKeys: Cancel operation. Exit..."); return -2; } ui64Key = bytes_to_num(keys + i * 6, 6); int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel); - + // can't select if (res == 1) { retryCount++; @@ -883,10 +883,10 @@ int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t --i; // try the same key once again SpinDelay(20); -// Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType); +// Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType); continue; } - + // can't authenticate if (res == 2) { retryCount = 0; @@ -895,15 +895,15 @@ int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t return i + 1; } - + return 0; } // multisector multikey check int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) { int res = 0; - -// int clk = GetCountSspClk(); + +// int clk = GetCountSspClk(); for(int sc = 0; sc < SectorCount; sc++){ WDT_HIT(); @@ -919,9 +919,9 @@ int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, u } } while(--keyAB > 0); } - -// Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1))); - + +// Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1))); + return 0; } diff --git a/client/cmdhflist.c b/client/cmdhflist.c index 1aa501e6..4499cd0d 100644 --- a/client/cmdhflist.c +++ b/client/cmdhflist.c @@ -937,7 +937,6 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui char line[16][110]; for (int j = 0; j < data_len && j/16 < 16; j++) { - uint8_t parityBits = parityBytes[j>>3]; if (protocol != ISO_14443B && protocol != ISO_15693 @@ -948,7 +947,6 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui } else { snprintf(line[j/16]+(( j % 16) * 4), 110, " %02x ", frame[j]); } - } if (markCRCBytes) { @@ -961,6 +959,13 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui } } + // mark short bytes (less than 8 Bit + Parity) + if (protocol == ISO_14443A || protocol == PROTO_MIFARE) { + if (duration < 128 * (9 * data_len)) { + line[(data_len-1)/16][((data_len-1)%16) * 4 + 3] = '\''; + } + } + if (data_len == 0) { sprintf(line[0]," "); } @@ -990,7 +995,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui int num_lines = MIN((data_len - 1)/16 + 1, 16); for (int j = 0; j < num_lines ; j++) { if (j == 0) { - PrintAndLog(" %10d | %10d | %s |%-64s | %s| %s", + PrintAndLog(" %10" PRIu32 " | %10" PRIu32 " | %s |%-64s | %s| %s", (timestamp - first_timestamp), (EndOfTransmissionTimestamp - first_timestamp), (isResponse ? "Tag" : "Rdr"), @@ -1004,7 +1009,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui (j == num_lines-1) ? explanation : ""); } } - + if (DecodeMifareData(frame, data_len, parityBytes, isResponse, mfData, &mfDataLen)) { memset(explanation, 0x00, sizeof(explanation)); if (!isResponse) { @@ -1222,7 +1227,7 @@ int CmdHFList(const char *Cmd) PrintAndLog("iso14443a - All times are in carrier periods (1/13.56Mhz)"); PrintAndLog("iClass - Timings are not as accurate"); PrintAndLog(""); - PrintAndLog(" Start | End | Src | Data (! denotes parity error) | CRC | Annotation |"); + PrintAndLog(" Start | End | Src | Data (! denotes parity error, ' denotes short bytes) | CRC | Annotation |"); PrintAndLog("------------|------------|-----|-----------------------------------------------------------------|-----|--------------------|"); ClearAuthData(); diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c index 4ba000f3..903e8575 100644 --- a/client/cmdhfmf.c +++ b/client/cmdhfmf.c @@ -1445,7 +1445,7 @@ int usage_hf14_mfsim(void) { int CmdHF14AMfSim(const char *Cmd) { UsbCommand resp; - uint8_t uid[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + uint8_t uid[7] = {0}; uint8_t exitAfterNReads = 0; uint8_t flags = 0; int uidlen = 0; @@ -1563,7 +1563,6 @@ int CmdHF14AMfSim(const char *Cmd) { uidlen = strlen(buf)-1; switch(uidlen) { - case 20: flags |= FLAG_10B_UID_IN_DATA; break; //not complete case 14: flags |= FLAG_7B_UID_IN_DATA; break; case 8: flags |= FLAG_4B_UID_IN_DATA; break; default: @@ -1581,8 +1580,7 @@ int CmdHF14AMfSim(const char *Cmd) { cardsize == '2' ? "2K" : cardsize == '4' ? "4K" : "1K", flags & FLAG_4B_UID_IN_DATA ? sprint_hex(uid,4): - flags & FLAG_7B_UID_IN_DATA ? sprint_hex(uid,7): - flags & FLAG_10B_UID_IN_DATA ? sprint_hex(uid,10): "N/A", + flags & FLAG_7B_UID_IN_DATA ? sprint_hex(uid,7): "N/A", exitAfterNReads, flags, flags); @@ -1592,7 +1590,7 @@ int CmdHF14AMfSim(const char *Cmd) { clearCommandBuffer(); SendCommand(&c); - while(! WaitForResponseTimeout(CMD_ACK,&resp,1500)) { + while (! WaitForResponseTimeout(CMD_ACK,&resp,1500)) { //We're waiting only 1.5 s at a time, otherwise we get the // annoying message about "Waiting for a response... " } @@ -1609,6 +1607,7 @@ int CmdHF14AMfSim(const char *Cmd) { count++; } fclose(f); + } else { //not from file PrintAndLog("mf sim cardsize: %s, uid: %s, numreads:%d, flags:%d (0x%02x) ", @@ -1616,8 +1615,7 @@ int CmdHF14AMfSim(const char *Cmd) { cardsize == '2' ? "2K" : cardsize == '4' ? "4K" : "1K", flags & FLAG_4B_UID_IN_DATA ? sprint_hex(uid,4): - flags & FLAG_7B_UID_IN_DATA ? sprint_hex(uid,7): - flags & FLAG_10B_UID_IN_DATA ? sprint_hex(uid,10): "N/A", + flags & FLAG_7B_UID_IN_DATA ? sprint_hex(uid,7): "N/A", exitAfterNReads, flags, flags); diff --git a/include/usb_cmd.h b/include/usb_cmd.h index ef282256..9ef929b9 100644 --- a/include/usb_cmd.h +++ b/include/usb_cmd.h @@ -226,12 +226,11 @@ typedef struct{ //Mifare simulation flags -#define FLAG_INTERACTIVE 0x01 -#define FLAG_4B_UID_IN_DATA 0x02 -#define FLAG_7B_UID_IN_DATA 0x04 -#define FLAG_10B_UID_IN_DATA 0x08 -#define FLAG_NR_AR_ATTACK 0x10 -#define FLAG_RANDOM_NONCE 0x20 +#define FLAG_INTERACTIVE (1<<0) +#define FLAG_4B_UID_IN_DATA (1<<1) +#define FLAG_7B_UID_IN_DATA (1<<2) +#define FLAG_NR_AR_ATTACK (1<<4) +#define FLAG_RANDOM_NONCE (1<<5) //Iclass reader flags