mirror of
https://github.com/Proxmark/proxmark3.git
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264 lines
8.1 KiB
C
264 lines
8.1 KiB
C
//-----------------------------------------------------------------------------
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Low frequency Presco tag commands
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// ASK/Manchester, rf/32, 128 bits (complete)
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//-----------------------------------------------------------------------------
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#include <string.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include "cmdlfpresco.h"
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#include "proxmark3.h"
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#include "ui.h"
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#include "util.h"
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#include "graph.h"
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#include "cmdparser.h"
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#include "cmddata.h"
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#include "cmdmain.h"
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#include "cmdlf.h"
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#include "protocols.h" // for T55xx config register definitions
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#include "lfdemod.h" // parityTest
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static int CmdHelp(const char *Cmd);
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int usage_lf_presco_clone(void){
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PrintAndLog("clone a Presco tag to a T55x7 tag.");
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PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
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PrintAndLog("Options :");
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PrintAndLog(" d <Card-ID> : 9 digit presco card ID");
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PrintAndLog(" H <hex-ID> : 8 digit hex card number");
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PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
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PrintAndLog("");
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PrintAndLog("Sample : lf presco clone d 123456789");
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return 0;
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}
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int usage_lf_presco_sim(void) {
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PrintAndLog("Enables simulation of presco card with specified card number.");
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PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
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PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
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PrintAndLog("");
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PrintAndLog("Usage: lf presco sim d <Card-ID> or H <hex-ID>");
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PrintAndLog("Options :");
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PrintAndLog(" d <Card-ID> : 9 digit presco card number");
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PrintAndLog(" H <hex-ID> : 8 digit hex card number");
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PrintAndLog("");
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PrintAndLog("Sample : lf presco sim d 123456789");
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return 0;
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}
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// convert base 12 ID to sitecode & usercode & 8 bit other unknown code
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int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
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uint8_t val = 0;
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bool hex = false, errors = false;
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uint8_t cmdp = 0;
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char id[11];
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int stringlen = 0;
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while(param_getchar(Cmd, cmdp) != 0x00) {
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switch(param_getchar(Cmd, cmdp)) {
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case 'h':
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return -1;
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case 'H':
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hex = true;
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//get hex
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*fullcode = param_get32ex(Cmd, cmdp+1, 0, 10);
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cmdp+=2;
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break;
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case 'P':
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case 'p':
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//param get string int param_getstr(const char *line, int paramnum, char * str)
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stringlen = param_getstr(Cmd, cmdp+1, id);
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if (stringlen < 2) return -1;
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cmdp+=2;
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break;
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case 'Q':
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case 'q':
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*Q5 = true;
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cmdp++;
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break;
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default:
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PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
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errors = 1;
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break;
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}
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if(errors) break;
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}
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// No args
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if(cmdp == 0) errors = 1;
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//Validations
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if(errors) return -1;
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if (!hex) {
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for (int index =0; index < strlen(id); ++index) {
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// Get value from number string.
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if ( id[index] == '*' ) val = 10;
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if ( id[index] == '#') val = 11;
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if ( id[index] >= 0x30 && id[index] <= 0x39 )
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val = id[index] - 0x30;
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*fullcode += val;
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// last digit is only added, not multipled.
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if ( index < strlen(id)-1 )
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*fullcode *= 12;
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}
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}
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*usercode = *fullcode & 0x0000FFFF; //% 65566
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*sitecode = (*fullcode >> 24) & 0x000000FF; // /= 16777216;
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return 0;
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}
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// calc not certain - intended to get bitstream for programming / sim
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int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
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num_to_bytebits(0x10D00000, 32, prescoBits);
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num_to_bytebits(0x00000000, 32, prescoBits+32);
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num_to_bytebits(0x00000000, 32, prescoBits+64);
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num_to_bytebits(fullcode , 32, prescoBits+96);
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return 1;
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}
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//see ASKDemod for what args are accepted
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int CmdPrescoDemod(const char *Cmd) {
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if (!ASKDemod(Cmd, false, false, 1)) {
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if (g_debugMode) PrintAndLog("ASKDemod failed");
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return 0;
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}
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size_t size = DemodBufferLen;
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//call lfdemod.c demod for presco
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int ans = PrescoDemod(DemodBuffer, &size);
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if (ans < 0) {
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if (g_debugMode) PrintAndLog("Error Presco_Demod %d", ans);
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return 0;
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}
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//got a good demod
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uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
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uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
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uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
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uint32_t raw4 = bytebits_to_byte(DemodBuffer+ans+96, 32);
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uint32_t cardid = raw4;
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PrintAndLog("Presco Tag Found: Card ID %08X", cardid);
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PrintAndLog("Raw: %08X%08X%08X%08X", raw1,raw2,raw3,raw4);
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setDemodBuf(DemodBuffer, 128, ans);
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setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
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uint32_t sitecode = 0, usercode = 0, fullcode = 0;
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bool Q5=false;
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char cmd[12] = {0};
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sprintf(cmd, "H %08X", cardid);
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GetWiegandFromPresco(cmd, &sitecode, &usercode, &fullcode, &Q5);
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PrintAndLog("SiteCode %u, UserCode %u, FullCode, %08X", sitecode, usercode, fullcode);
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return 1;
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}
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//see ASKDemod for what args are accepted
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int CmdPrescoRead(const char *Cmd) {
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// Presco Number: 123456789 --> Sitecode 30 | usercode 8665
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// read lf silently
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lf_read(true, 10000);
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// demod and output Presco ID
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return CmdPrescoDemod(Cmd);
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}
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// takes base 12 ID converts to hex
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// Or takes 8 digit hex ID
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int CmdPrescoClone(const char *Cmd) {
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bool Q5 = false;
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uint32_t sitecode=0, usercode=0, fullcode=0;
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uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
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// get wiegand from printed number.
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if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
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if (Q5)
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blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1)<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
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if ((sitecode & 0xFF) != sitecode) {
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sitecode &= 0xFF;
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PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
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}
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if ((usercode & 0xFFFF) != usercode) {
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usercode &= 0xFFFF;
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PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
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}
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blocks[1] = 0x10D00000; //preamble
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blocks[2] = 0x00000000;
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blocks[3] = 0x00000000;
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blocks[4] = fullcode;
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PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u, FullCode: %08x", sitecode, usercode, fullcode);
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PrintAndLog("Blk | Data ");
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PrintAndLog("----+------------");
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PrintAndLog(" 00 | 0x%08x", blocks[0]);
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PrintAndLog(" 01 | 0x%08x", blocks[1]);
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PrintAndLog(" 02 | 0x%08x", blocks[2]);
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PrintAndLog(" 03 | 0x%08x", blocks[3]);
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PrintAndLog(" 04 | 0x%08x", blocks[4]);
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UsbCommand resp;
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UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
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for (int i=4; i>=0; i--) {
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c.arg[0] = blocks[i];
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c.arg[1] = i;
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clearCommandBuffer();
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SendCommand(&c);
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if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
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PrintAndLog("Error occurred, device did not respond during write operation.");
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return -1;
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}
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}
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return 0;
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}
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// takes base 12 ID converts to hex
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// Or takes 8 digit hex ID
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int CmdPrescoSim(const char *Cmd) {
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uint32_t sitecode=0, usercode=0, fullcode=0;
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bool Q5=false;
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// get wiegand from printed number.
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if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_sim();
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uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
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uint16_t arg1, arg2;
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size_t size = 128;
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arg1 = clk << 8 | encoding;
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arg2 = invert << 8 | separator;
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PrintAndLog("Simulating Presco - SiteCode: %u, UserCode: %u, FullCode: %08X",sitecode, usercode, fullcode);
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UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
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GetPrescoBits(fullcode, c.d.asBytes);
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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static command_t CommandTable[] = {
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{"help", CmdHelp, 1, "This help"},
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{"read", CmdPrescoRead, 0, "Attempt to read and Extract tag data"},
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{"clone", CmdPrescoClone, 0, "d <9 digit ID> or h <hex> [Q5] clone presco tag"},
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{"sim", CmdPrescoSim, 0, "d <9 digit ID> or h <hex> simulate presco tag"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFPresco(const char *Cmd) {
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clearCommandBuffer();
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd) {
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CmdsHelp(CommandTable);
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return 0;
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}
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