// the license.
//-----------------------------------------------------------------------------
// Low frequency HID commands (known)
+//
+// Useful resources:
+// RF interface, programming a T55x7 clone, 26-bit HID H10301 encoding:
+// http://www.proxmark.org/files/Documents/125%20kHz%20-%20HID/HID_format_example.pdf
+//
+// "Understanding Card Data Formats"
+// https://www.hidglobal.com/sites/default/files/hid-understanding_card_data_formats-wp-en.pdf
+//
+// "What Format Do You Need?"
+// https://www.hidglobal.com/sites/default/files/resource_files/hid-prox-br-en.pdf
//-----------------------------------------------------------------------------
#include "cmdlfhid.h"
#include "cmdparser.h"
#include "cmddata.h" //for g_debugMode, demodbuff cmds
#include "lfdemod.h" // for HIDdemodFSK
+#include "parity.h" // for parity
+#include "util.h" // for param_get8,32
static int CmdHelp(const char *Cmd);
+
+/**
+ * Packs a "short" (<38-bit) HID ID from component parts.
+ *
+ * This only works with 26, 34, 35 and 37 bit card IDs.
+ *
+ * NOTE: Parity calculation is only supported on 26-bit tags. Other card lengths
+ * may have invalid parity.
+ *
+ * Returns false on invalid inputs.
+ */
+bool pack_short_hid(/* out */ uint32_t *hi, /* out */ uint32_t *lo, /* in */ const short_hid_info *info) {
+ uint32_t high = 0, low = 0;
+
+ switch (info->fmtLen) {
+ case 26: // HID H10301
+ low |= (info->cardnum & 0xffff) << 1;
+ low |= (info->fc & 0xff) << 17;
+
+ if (info->parityValid) {
+ // Calculate parity
+ low |= oddparity32((low >> 1) & 0xfff) & 1;
+ low |= (evenparity32((low >> 13) & 0xfff) & 1) << 25;
+ }
+ break;
+
+ case 34:
+ low |= (info->cardnum & 0xffff) << 1;
+ low |= (info->fc & 0x7fff) << 17;
+ high |= (info->fc & 0x8000) >> 15;
+ // TODO: Calculate parity
+ break;
+
+ case 35:
+ low |= (info->cardnum & 0xfffff) << 1;
+ low |= (info->fc & 0x7ff) << 21;
+ high |= (info->fc & 0x800) >> 11;
+ // TODO: Calculate parity
+ break;
+
+ case 37:
+ low |= (info->cardnum & 0x7ffff) << 1;
+ low |= (info->fc & 0xfff) << 20;
+ high |= (info->fc & 0xf000) >> 12;
+ // TODO: Calculate parity
+ break;
+
+ default:
+ // Invalid / unsupported length
+ return false;
+ }
+
+ // Set the highest bit
+ if (info->fmtLen != 37) {
+ // Bit 37 is always set
+ high |= 0x20;
+
+ // Set the bit corresponding to the length.
+ if (info->fmtLen < 32) {
+ low |= 1 << info->fmtLen;
+ } else {
+ high |= 1 << (info->fmtLen - 32);
+ }
+ }
+
+ // Return result only if successful.
+ *hi = high;
+ *lo = low;
+ return true;
+}
+
+
+/**
+ * Unpacks a "short" (<38-bit) HID ID into its component parts.
+ *
+ * This only works with 26, 34, 35 and 37 bit card IDs.
+ *
+ * NOTE: Parity checking is only supported on 26-bit tags.
+ *
+ * Returns false on invalid inputs.
+ */
+bool unpack_short_hid(short_hid_info *out, uint32_t hi, uint32_t lo) {
+ memset(out, 0, sizeof(short_hid_info));
+
+ if (((hi >> 5) & 1) == 1) {
+ // if bit 38 is set then < 37 bit format is used
+ uint32_t lo2 = 0;
+ // get bits 21-37 to check for format len bit
+ lo2 = (((hi & 31) << 12) | (lo >> 20));
+ uint8_t idx3 = 1;
+ // find last bit set to 1 (format len bit)
+ while (lo2 > 1) {
+ lo2 = lo2 >> 1;
+ idx3++;
+ }
+
+ out->fmtLen = idx3 + 19;
+
+ switch (out->fmtLen) {
+ case 26: // HID H10301
+ out->cardnum = (lo >> 1) & 0xFFFF;
+ out->fc = (lo >> 17) & 0xFF;
+
+ if (g_debugMode) {
+ PrintAndLog("oddparity : input=%x, calculated=%d, provided=%d",
+ (lo >> 1) & 0xFFF, oddparity32((lo >> 1) & 0xFFF), lo & 1);
+ PrintAndLog("evenparity: input=%x, calculated=%d, provided=%d",
+ (lo >> 13) & 0xFFF, evenparity32((lo >> 13) & 0xFFF) & 1, (lo >> 25) & 1);
+ }
+
+ out->parityValid =
+ (oddparity32((lo >> 1) & 0xFFF) == (lo & 1)) &&
+ ((evenparity32((lo >> 13) & 0xFFF) & 1) == ((lo >> 25) & 1));
+ break;
+
+ case 34:
+ out->cardnum = (lo >> 1) & 0xFFFF;
+ out->fc = ((hi & 1) << 15) | (lo >> 17);
+ // TODO: Calculate parity
+ break;
+
+ case 35:
+ out->cardnum = (lo >> 1) & 0xFFFFF;
+ out->fc = ((hi & 1) << 11) | (lo >> 21);
+ // TODO: Calculate parity
+ break;
+
+ default:
+ return false;
+ }
+ } else {
+ // If bit 38 is not set, then 37 bit format is used
+ out->fmtLen = 37;
+ out->cardnum = (lo >> 1) & 0x7FFFF;
+ out->fc = ((hi & 0xF) << 12) | (lo >> 20);
+ // TODO: Calculate parity
+ }
+ return true;
+}
+
+
+/**
+ * Converts a hex string to component "hi" and "lo" 32-bit integers, one nibble
+ * at a time.
+ *
+ * Returns the number of nibbles (4 bits) entered.
+ */
+int hexstring_to_int64(/* out */ uint32_t* hi, /* out */ uint32_t* lo, const char* str) {
+ // TODO: Replace this with param_gethex when it supports arbitrary length
+ // inputs.
+ int n = 0, i = 0;
+
+ while (sscanf(&str[i++], "%1x", &n ) == 1) {
+ *hi = (*hi << 4) | (*lo >> 28);
+ *lo = (*lo << 4) | (n & 0xf);
+ }
+
+ return i - 1;
+}
+
//by marshmellow (based on existing demod + holiman's refactor)
//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
//print full HID Prox ID and some bit format details if found
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
}
else { //standard HID tags <38 bits
- uint8_t fmtLen = 0;
- uint32_t fc = 0;
- uint32_t cardnum = 0;
- if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
- uint32_t lo2=0;
- lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
- uint8_t idx3 = 1;
- while(lo2>1){ //find last bit set to 1 (format len bit)
- lo2=lo2>>1;
- idx3++;
- }
- fmtLen =idx3+19;
- fc =0;
- cardnum=0;
- if(fmtLen==26){
- cardnum = (lo>>1)&0xFFFF;
- fc = (lo>>17)&0xFF;
- }
- if(fmtLen==34){
- cardnum = (lo>>1)&0xFFFF;
- fc= ((hi&1)<<15)|(lo>>17);
- }
- if(fmtLen==35){
- cardnum = (lo>>1)&0xFFFFF;
- fc = ((hi&1)<<11)|(lo>>21);
- }
+ short_hid_info card_info;
+ bool ret = unpack_short_hid(&card_info, (uint32_t)hi, (uint32_t)lo);
+ PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %u bits - FC: %u - Card: %u",
+ (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
+ card_info.fmtLen, card_info.fc, card_info.cardnum);
+
+ if (card_info.fmtLen == 26) {
+ PrintAndLog("Parity: %s", card_info.parityValid ? "valid" : "invalid");
}
- else { //if bit 38 is not set then 37 bit format is used
- fmtLen = 37;
- fc = 0;
- cardnum = 0;
- if(fmtLen == 37){
- cardnum = (lo>>1)&0x7FFFF;
- fc = ((hi&0xF)<<12)|(lo>>20);
- }
+
+ if (!ret) {
+ PrintAndLog("Invalid or unsupported tag length.");
}
- PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
- (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
- (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
}
setDemodBuf(BitStream,BitLen,idx);
setClockGrid(50, waveIdx + (idx*50));
int CmdHIDReadFSK(const char *Cmd)
{
int findone=0;
- if(Cmd[0]=='1') findone=1;
+ if(Cmd[0]=='1') findone=1;
UsbCommand c={CMD_HID_DEMOD_FSK};
c.arg[0]=findone;
SendCommand(&c);
int CmdHIDSim(const char *Cmd)
{
- uint32_t hi = 0, lo = 0;
- int n = 0, i = 0;
-
- while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
- hi = (hi << 4) | (lo >> 28);
- lo = (lo << 4) | (n & 0xf);
- }
+ uint32_t hi = 0, lo = 0;
+ hexstring_to_int64(&hi, &lo, Cmd);
+ if (hi >= 0x40) {
+ PrintAndLog("This looks like a long tag ID. Use 'lf simfsk' for long tags. Aborting!");
+ return 0;
+ }
- PrintAndLog("Emulating tag with ID %x%08x", hi, lo);
- PrintAndLog("Press pm3-button to abort simulation");
+ PrintAndLog("Emulating tag with ID %x%08x", hi, lo);
+ PrintAndLog("Press pm3-button to abort simulation");
- UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
- SendCommand(&c);
- return 0;
+ UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
+ SendCommand(&c);
+ return 0;
}
int CmdHIDClone(const char *Cmd)
{
unsigned int hi2 = 0, hi = 0, lo = 0;
- int n = 0, i = 0;
UsbCommand c;
if (strchr(Cmd,'l') != 0) {
- while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
+ int n = 0, i = 0;
+
+ while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
hi2 = (hi2 << 4) | (hi >> 28);
hi = (hi << 4) | (lo >> 28);
lo = (lo << 4) | (n & 0xf);
c.d.asBytes[0] = 1;
}
else {
- while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
- hi = (hi << 4) | (lo >> 28);
- lo = (lo << 4) | (n & 0xf);
+ hexstring_to_int64(&hi, &lo, Cmd);
+ if (hi >= 0x40) {
+ PrintAndLog("This looks like a long tag ID. Aborting!");
+ return 0;
}
PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
return 0;
}
+
+int CmdHIDPack(const char *Cmd) {
+ uint32_t hi = 0, lo = 0;
+ short_hid_info card_info;
+
+ if (strlen(Cmd)<3) {
+ PrintAndLog("Usage: lf hid pack <length> <facility code (decimal)> <card number (decimal)>");
+ PrintAndLog(" sample: lf hid pack 26 123 4567");
+ return 0;
+ }
+
+ card_info.fmtLen = param_get8(Cmd, 0);
+ card_info.fc = param_get32ex(Cmd, 1, 0, 10);
+ card_info.cardnum = param_get32ex(Cmd, 2, 0, 10);
+ card_info.parityValid = true;
+
+ // TODO
+ if (card_info.fmtLen != 26) {
+ PrintAndLog("Warning: Parity bits are only calculated for 26 bit IDs -- this may be invalid!");
+ }
+
+ bool ret = pack_short_hid(&hi, &lo, &card_info);
+
+ if (ret) {
+ PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %u bits - FC: %u - Card: %u",
+ (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
+ card_info.fmtLen, card_info.fc, card_info.cardnum);
+ } else {
+ PrintAndLog("Invalid or unsupported tag length.");
+ }
+ return 0;
+}
+
+
+int CmdHIDUnpack(const char *Cmd)
+{
+ uint32_t hi = 0, lo = 0;
+ if (strlen(Cmd)<1) {
+ PrintAndLog("Usage: lf hid unpack <ID>");
+ PrintAndLog(" sample: lf hid unpack 2006f623ae");
+ return 0;
+ }
+
+ hexstring_to_int64(&hi, &lo, Cmd);
+ if (hi >= 0x40) {
+ PrintAndLog("This looks like a long tag ID. Aborting!");
+ return 0;
+ }
+
+ short_hid_info card_info;
+ bool ret = unpack_short_hid(&card_info, hi, lo);
+
+ PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %u bits - FC: %u - Card: %u",
+ (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
+ card_info.fmtLen, card_info.fc, card_info.cardnum);
+
+ if (card_info.fmtLen == 26) {
+ PrintAndLog("Parity: %s", card_info.parityValid ? "valid" : "invalid");
+ }
+
+ if (!ret) {
+ PrintAndLog("Invalid or unsupported tag length.");
+ }
+ return 0;
+}
+
+
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"read", CmdHIDReadFSK, 0, "['1'] Realtime HID FSK Read from antenna (option '1' for one tag only)"},
{"sim", CmdHIDSim, 0, "<ID> -- HID tag simulator"},
{"clone", CmdHIDClone, 0, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
+ {"pack", CmdHIDPack, 1, "<len> <fc> <num> -- packs a <38 bit (short) HID ID from its length, facility code and card number"},
+ {"unpack", CmdHIDUnpack, 1, "<ID> -- unpacks a <38 bit (short) HID ID to its length, facility code and card number"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / commitdiff