//-----------------------------------------------------------------------------
// Low frequency Presco tag commands
//-----------------------------------------------------------------------------
+
#include "cmdlfjablotron.h"
static int CmdHelp(const char *Cmd);
PrintAndLog(" <card ID> : jablotron card ID");
PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
PrintAndLog("");
- PrintAndLog("Sample: lf jablotron clone d 112233");
+ PrintAndLog("Sample: lf jablotron clone 112233");
return 0;
}
PrintAndLog(" h : This help");
PrintAndLog(" <card ID> : jablotron card ID");
PrintAndLog("");
- PrintAndLog("Sample: lf jablotron sim d 112233");
+ PrintAndLog("Sample: lf jablotron sim 112233");
return 0;
}
+static uint8_t jablontron_chksum(uint8_t *bits){
+ uint8_t chksum = 0;
+ for (int i=16; i < 56; i += 8) {
+ chksum += bytebits_to_byte(bits+i,8);
+ }
+ chksum ^= 0x3A;
+ return chksum;
+}
+
int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
//preamp
num_to_bytebits(0xFFFF, 16, bits);
num_to_bytebits(fullcode, 40, bits+16);
//chksum byte
- uint8_t crc = 0;
- for (int i=16; i < 56; i += 8) {
- crc += bytebits_to_byte(bits+i,8);
- }
- crc ^= 0x3A;
- num_to_bytebits(crc, 8, bits+56);
-
+ uint8_t chksum = jablontron_chksum(bits);
+ num_to_bytebits(chksum, 8, bits+56);
return 1;
}
+static uint64_t getJablontronCardId( uint64_t rawcode ){
+ uint64_t id = 0;
+ uint8_t bytes[] = {0,0,0,0,0};
+ num_to_bytes(rawcode, 5, bytes);
+ for ( int i = 4, j = 0; i > -1; --i, j += 2 ) {
+ id += NIBBLE_LOW( bytes[i] ) * (int)pow(10,j);
+ id += NIBBLE_HIGH( bytes[i] ) * (int)pow(10,j+1);
+ }
+ return id;
+}
+
//see ASKDemod for what args are accepted
int CmdJablotronDemod(const char *Cmd) {
if (g_debugMode){
// if (ans == -5)
// PrintAndLog("DEBUG: Error - not enough samples");
- // else if (ans == -1)
- // PrintAndLog("DEBUG: Error - only noise found");
+ if (ans == -1)
+ PrintAndLog("DEBUG: Error - Jablotron too few bits found");
// else if (ans == -2)
// PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
- if (ans == -3)
- PrintAndLog("DEBUG: Error - Size not correct: %d", size);
+ else if (ans == -3)
+ PrintAndLog("DEBUG: Error - Jablotron Size not correct: %d", size);
else if (ans == -4)
PrintAndLog("DEBUG: Error - Jablotron preamble not found");
+ else if (ans == -5)
+ PrintAndLog("DEBUG: Error - Jablotron checksum failed");
else
PrintAndLog("DEBUG: Error - ans: %d", ans);
}
return 0;
}
- //got a good demod
- uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
- uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
- uint64_t cardid = (raw1 & 0x0000FFFF);
- cardid <<= 32;
- cardid |= (raw2 >> 8);
-
- PrintAndLog("Jablotron Tag Found: Card ID %012X", cardid);
- PrintAndLog("Raw: %08X%08X", raw1 ,raw2);
setDemodBuf(DemodBuffer+ans, 64, 0);
- //PrintAndLog("1410-%u-%u-%08X-%02X", fullcode);
+ //got a good demod
+ uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
+ uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
+
+ uint64_t rawid = bytebits_to_byte(DemodBuffer+16, 40);
+ uint64_t id = getJablontronCardId(rawid);
+
+ PrintAndLog("Jablotron Tag Found: Card ID %u", id);
+ PrintAndLog("Raw: %08X%08X", raw1 ,raw2);
+
+ uint8_t chksum = raw2 & 0xFF;
+ PrintAndLog("Checksum: %02X [%s]",
+ chksum,
+ (chksum == jablontron_chksum(DemodBuffer)) ? "OK":"FAIL"
+ );
+
+ id = DEC2BCD(id);
+ // Printed format: 1410-nn-nnnn-nnnn
+ PrintAndLog("Printed: 1410-%02X-%04X-%04X",
+ (uint8_t)(id >> 32) & 0xFF,
+ (uint16_t)(id >> 16) & 0xFFFF,
+ (uint16_t)id & 0xFFFF
+ );
return 1;
}
blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 2<<T5555_MAXBLOCK_SHIFT;
}
- if ((fullcode & 0xFFFFFFFFFFFF) != fullcode) {
- fullcode &= 0xFFFFFFFFFFFF;
- PrintAndLog("Card Number Truncated to 40-bits: %u", fullcode);
+ // clearing the topbit needed for the preambl detection.
+ if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
+ fullcode &= 0x7FFFFFFFFF;
+ PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
}
-
+
if ( !getJablotronBits(fullcode, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
blocks[1] = bytebits_to_byte(bs,32);
blocks[2] = bytebits_to_byte(bs+32,32);
- PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %012X", fullcode);
+ PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
PrintAndLog("Blk | Data ");
PrintAndLog("----+------------");
PrintAndLog(" 00 | 0x%08x", blocks[0]);
UsbCommand resp;
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
- for (int i=4; i>=0; i--) {
+ for (int i = 2; i >= 0; --i) {
c.arg[0] = blocks[i];
c.arg[1] = i;
clearCommandBuffer();
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_sim();
fullcode = param_get64ex(Cmd, 0, 0, 16);
+
+ // clearing the topbit needed for the preambl detection.
+ if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
+ fullcode &= 0x7FFFFFFFFF;
+ PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
+ }
uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
uint16_t arg1, arg2;
arg1 = clk << 8 | encoding;
arg2 = invert << 8 | separator;
- PrintAndLog("Simulating Jablotron - FullCode: %012X", fullcode);
+ PrintAndLog("Simulating Jablotron - FullCode: %"PRIx64, fullcode);
UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
getJablotronBits(fullcode, c.d.asBytes);
projects / proxmark3-svn / blobdiff