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https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 15:26:13 +08:00
CRC optional, replaced by magic on USB
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parent
482db05741
commit
9ff841efb2
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@ -1452,11 +1452,7 @@ static void PacketReceived(PacketCommandNG *packet) {
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if (packet->ng) {
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reply_ng(CMD_PING, PM3_SUCCESS, packet->data.asBytes, packet->length);
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} else {
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#ifdef WITH_FPC_HOST
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reply_old(CMD_ACK, reply_via_fpc, 0, 0, 0, 0);
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#else
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reply_old(CMD_ACK, 0, 0, 0, 0, 0);
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#endif
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}
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break;
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#ifdef WITH_LCD
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@ -222,7 +222,9 @@ void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data);
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void iClass_ReadCheck(uint8_t blockno, uint8_t keytype);
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// cmd.h
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uint8_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len);
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int16_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len);
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int16_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len);
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int16_t receive_ng(PacketCommandNG *rx);
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// util.h
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void HfSniff(int, int);
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@ -18,6 +18,11 @@ static char *serial_port_name = NULL;
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// If TRUE, then there is no active connection to the PM3, and we will drop commands sent.
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static bool offline;
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// Flags to tell where to add CRC on sent replies
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bool send_with_crc_on_usb = false;
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bool send_with_crc_on_fpc = true;
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// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART
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bool send_via_fpc = false;
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static communication_arg_t conn;
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@ -120,9 +125,16 @@ void SendCommandNG(uint16_t cmd, uint8_t *data, size_t len) {
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txBufferNG.pre.length = len;
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txBufferNG.pre.cmd = cmd;
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memcpy(&txBufferNG.data, data, len);
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&txBufferNG, sizeof(PacketCommandNGPreamble) + len, &first, &second);
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tx_post->crc = (first << 8) + second;
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if ((send_via_fpc && send_with_crc_on_fpc) || ((!send_via_fpc) && send_with_crc_on_usb)) {
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&txBufferNG, sizeof(PacketCommandNGPreamble) + len, &first, &second);
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tx_post->crc = (first << 8) + second;
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} else {
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tx_post->crc = USB_COMMANDNG_POSTAMBLE_MAGIC;
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}
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txBufferNGLen = sizeof(PacketCommandNGPreamble) + len + sizeof(PacketCommandNGPostamble);
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txBuffer_pending = true;
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@ -316,13 +328,15 @@ __attribute__((force_align_arg_pointer))
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error = true;
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}
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}
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if (!error) { // Check CRC
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if (!error) { // Check CRC, accept MAGIC as placeholder
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rx.crc = rx_raw.foopost.crc;
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&rx_raw, sizeof(PacketResponseNGPreamble) + rx.length, &first, &second);
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if ((first << 8) + second != rx.crc) {
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PrintAndLogEx(WARNING, "Received packet frame CRC error %02X%02X <> %04X", first, second, rx.crc);
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error = true;
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if (rx.crc != USB_REPLYNG_POSTAMBLE_MAGIC) {
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&rx_raw, sizeof(PacketResponseNGPreamble) + rx.length, &first, &second);
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if ((first << 8) + second != rx.crc) {
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PrintAndLogEx(WARNING, "Received packet frame CRC error %02X%02X <> %04X", first, second, rx.crc);
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error = true;
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}
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}
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}
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if (!error) {
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@ -463,7 +477,8 @@ int TestProxmark(void) {
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PacketCommandOLD c = {CMD_PING, {0, 0, 0}, {{0}}};
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SendCommand(&c);
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if (WaitForResponseTimeout(CMD_ACK, &resp, 5000)) {
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PrintAndLogEx(INFO, "Communicating with PM3 over %s.", resp.oldarg[0] == 1 ? "FPC" : "USB");
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send_via_fpc = resp.oldarg[0] == 1;
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PrintAndLogEx(INFO, "Communicating with PM3 over %s.", send_via_fpc ? "FPC" : "USB");
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return 1;
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} else {
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return 0;
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@ -44,6 +44,11 @@ typedef struct {
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bool block_after_ACK; // if true, block after receiving an ACK package
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} communication_arg_t;
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// Flags to tell where to add CRC on sent replies
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extern bool send_with_crc_on_usb;
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extern bool send_with_crc_on_fpc;
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// "Session" flag, to tell via which interface next msgs are sent: USB or FPC USART
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extern bool send_via_fpc;
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void SetOffline(bool value);
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bool IsOffline(void);
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55
common/cmd.c
55
common/cmd.c
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@ -32,18 +32,22 @@
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#include "cmd.h"
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#include "crc16.h"
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#ifdef WITH_FPC_HOST
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// Flags to tell where to add CRC on sent replies
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bool reply_with_crc_on_usb = false;
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bool reply_with_crc_on_fpc = true;
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// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART
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bool reply_via_fpc = false;
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#ifdef WITH_FPC_HOST
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extern void Dbprintf(const char *fmt, ...);
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#define Dbprintf_usb(...) {\
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bool tmp = reply_via_fpc;\
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reply_via_fpc = false;\
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Dbprintf(__VA_ARGS__);\
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reply_via_fpc = true;}
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reply_via_fpc = tmp;}
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#endif
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uint8_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
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int16_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
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PacketResponseOLD txcmd;
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for (size_t i = 0; i < sizeof(PacketResponseOLD); i++)
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@ -66,21 +70,21 @@ uint8_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, voi
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uint32_t sendlen = 0;
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// Send frame and make sure all bytes are transmitted
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#ifdef WITH_FPC_HOST
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if (reply_via_fpc) {
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#ifdef WITH_FPC_HOST
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sendlen = usart_writebuffer((uint8_t *)&txcmd, sizeof(PacketResponseOLD));
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// Dbprintf_usb("Sent %i bytes over usart", len);
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#else
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return PM3_EDEVNOTSUPP;
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#endif
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} else {
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sendlen = usb_write((uint8_t *)&txcmd, sizeof(PacketResponseOLD));
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}
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#else
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sendlen = usb_write((uint8_t *)&txcmd, sizeof(PacketResponseOLD));
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#endif
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return sendlen;
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}
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uint8_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len) {
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int16_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len) {
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PacketResponseNGRaw txBufferNG;
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size_t txBufferNGLen;
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// for (size_t i = 0; i < sizeof(txBufferNG); i++)
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@ -104,26 +108,29 @@ uint8_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len) {
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}
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}
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&txBufferNG, sizeof(PacketResponseNGPreamble) + len, &first, &second);
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PacketResponseNGPostamble *tx_post = (PacketResponseNGPostamble *)((uint8_t *)&txBufferNG + sizeof(PacketResponseNGPreamble) + len);
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tx_post->crc = (first << 8) + second;
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if ((reply_via_fpc && reply_with_crc_on_fpc) || ((!reply_via_fpc) && reply_with_crc_on_usb)) {
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&txBufferNG, sizeof(PacketResponseNGPreamble) + len, &first, &second);
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tx_post->crc = (first << 8) + second;
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} else {
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tx_post->crc = USB_REPLYNG_POSTAMBLE_MAGIC;
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}
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txBufferNGLen = sizeof(PacketResponseNGPreamble) + len + sizeof(PacketResponseNGPostamble);
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uint32_t sendlen = 0;
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// Send frame and make sure all bytes are transmitted
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#ifdef WITH_FPC_HOST
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if (reply_via_fpc) {
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#ifdef WITH_FPC_HOST
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sendlen = usart_writebuffer((uint8_t *)&txBufferNG, txBufferNGLen);
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// Dbprintf_usb("Sent %i bytes over usart", len);
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#else
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return PM3_EDEVNOTSUPP;
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#endif
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} else {
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sendlen = usb_write((uint8_t *)&txBufferNG, txBufferNGLen);
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}
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#else
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sendlen = usb_write((uint8_t *)&txBufferNG, txBufferNGLen);
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#endif
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return sendlen;
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}
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@ -148,15 +155,15 @@ int16_t receive_ng(PacketCommandNG *rx) {
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bytes = usb_read_ng((uint8_t *)&rx_raw.foopost, sizeof(PacketCommandNGPostamble));
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if (bytes != sizeof(PacketCommandNGPostamble))
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return PM3_EIO;
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// Check CRC
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// Check CRC, accept MAGIC as placeholder
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rx->crc = rx_raw.foopost.crc;
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&rx_raw, sizeof(PacketCommandNGPreamble) + rx->length, &first, &second);
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if ((first << 8) + second != rx->crc)
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return PM3_EIO;
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#ifdef WITH_FPC_HOST
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if (rx->crc != USB_COMMANDNG_POSTAMBLE_MAGIC) {
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uint8_t first, second;
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compute_crc(CRC_14443_A, (uint8_t *)&rx_raw, sizeof(PacketCommandNGPreamble) + rx->length, &first, &second);
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if ((first << 8) + second != rx->crc)
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return PM3_EIO;
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}
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reply_via_fpc = false;
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#endif
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rx->ng = true;
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} else { // Old style command
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PacketCommandOLD rx_old;
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@ -164,9 +171,7 @@ int16_t receive_ng(PacketCommandNG *rx) {
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bytes = usb_read_ng(((uint8_t *)&rx_old) + sizeof(PacketCommandNGPreamble), sizeof(PacketCommandOLD) - sizeof(PacketCommandNGPreamble));
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if (bytes != sizeof(PacketCommandOLD) - sizeof(PacketCommandNGPreamble))
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return PM3_EIO;
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#ifdef WITH_FPC_HOST
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reply_via_fpc = false;
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#endif
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rx->ng = false;
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rx->magic = 0;
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rx->crc = 0;
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10
common/cmd.h
10
common/cmd.h
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@ -39,9 +39,15 @@
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#include "usart.h"
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#include "proxmark3.h"
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uint8_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len);
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uint8_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len);
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int16_t reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len);
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int16_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len);
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int16_t receive_ng(PacketCommandNG *rx);
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// Flags to tell where to add CRC on sent replies
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extern bool reply_with_crc_on_usb;
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extern bool reply_with_crc_on_fpc;
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// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART
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extern bool reply_via_fpc;
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#endif // _PROXMARK_CMD_H_
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@ -41,7 +41,8 @@ typedef struct {
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uint16_t cmd;
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} PACKED PacketCommandNGPreamble;
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#define USB_COMMANDNG_PREAMBLE_MAGIC 0x61334d50 // PM3a
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#define USB_COMMANDNG_PREAMBLE_MAGIC 0x61334d50 // PM3a
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#define USB_COMMANDNG_POSTAMBLE_MAGIC 0x3361 // a3
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typedef struct {
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uint16_t crc;
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uint16_t cmd;
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} PACKED PacketResponseNGPreamble;
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#define USB_REPLYNG_PREAMBLE_MAGIC 0x62334d50 // PM3b
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#define USB_REPLYNG_PREAMBLE_MAGIC 0x62334d50 // PM3b
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#define USB_REPLYNG_POSTAMBLE_MAGIC 0x3362 // b3
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typedef struct {
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uint16_t crc;
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@ -112,11 +114,6 @@ typedef struct {
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PacketResponseNGPostamble foopost; // Probably not at that offset!
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} PACKED PacketResponseNGRaw;
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#ifdef WITH_FPC_HOST
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// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART
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extern bool reply_via_fpc;
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#endif
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// A struct used to send sample-configs over USB
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typedef struct {
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uint8_t decimation;
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