+//-----------------------------------------------------------------------------
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency Presco tag commands
+//-----------------------------------------------------------------------------
+#include <string.h>
+#include <inttypes.h>
+#include "cmdlfpresco.h"
+static int CmdHelp(const char *Cmd);
+
+int usage_lf_presco_clone(void){
+ PrintAndLog("clone a Presco tag to a T55x7 tag.");
+ PrintAndLog("Usage: lf presco clone <Card ID - 9 digits> <Q5>");
+ PrintAndLog("Options :");
+ PrintAndLog(" <Card Number> : 9 digit presco card number");
+ //PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf presco clone 123456789");
+ return 0;
+}
+
+int usage_lf_presco_sim(void) {
+ PrintAndLog("Enables simulation of presco card with specified card number.");
+ PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
+ PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
+ PrintAndLog("");
+ PrintAndLog("Usage: lf presco sim <Card-Number>");
+ PrintAndLog("Options :");
+ PrintAndLog(" <Card Number> : 9 digit presco card number");
+ PrintAndLog("");
+ PrintAndLog("Sample : lf presco sim 123456789");
+ return 0;
+}
+
+// calc checksum
+int GetWiegandFromPresco(const char *id, uint32_t *sitecode, uint32_t *usercode) {
+
+ uint8_t val = 0;
+ for (int index =0; index < strlen(id); ++index) {
+
+ // Get value from number string.
+ if ( id[index] == '*' ) val = 10;
+ if ( id[index] == '#') val = 11;
+ if ( id[index] >= 0x30 && id[index] <= 0x39 )
+ val = id[index] - 0x30;
+
+ *sitecode += val;
+
+ // last digit is only added, not multipled.
+ if ( index < strlen(id)-1 )
+ *sitecode *= 12;
+ }
+ *usercode = *sitecode % 65536;
+ *sitecode /= 16777216;
+ return 0;
+}
+
+int GetPrescoBits(uint32_t sitecode, uint32_t usercode, uint8_t *prescoBits) {
+ uint8_t pre[66];
+ memset(pre, 0, sizeof(pre));
+ prescoBits[7]=1;
+ num_to_bytebits(26, 8, pre);
+
+ uint8_t wiegand[24];
+ num_to_bytebits(sitecode, 8, wiegand);
+ num_to_bytebits(usercode, 16, wiegand+8);
+
+ wiegand_add_parity(pre+8, wiegand, 24);
+ size_t bitLen = addParity(pre, prescoBits+8, 66, 4, 1);
+
+ if (bitLen != 88) return 0;
+ return 1;
+}
+
+//see ASKDemod for what args are accepted
+int CmdPrescoRead(const char *Cmd) {
+ PrintAndLog("Number: 123456789 --> Sitecode 30 | usercode 8665");
+// GetWiegandFromPresco("123456789");
+
+ // read lf silently
+ //CmdLFRead("s");
+ // get samples silently
+ //getSamples("30000",false);
+ // demod and output viking ID
+ //return CmdVikingDemod(Cmd);
+ return 0;
+}
+
+int CmdPrescoClone(const char *Cmd) {
+
+ char cmdp = param_getchar(Cmd, 0);
+ if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_presco_clone();
+
+ uint32_t sitecode=0, usercode=0;
+ uint8_t bits[96];
+ uint8_t *bs = bits;
+ memset(bs,0,sizeof(bits));
+ uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
+
+ if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
+ blocks[0] = T5555_MODULATION_MANCHESTER | 32<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
+
+ // get wiegand from printed number.
+ GetWiegandFromPresco(Cmd, &sitecode, &usercode);
+
+ if ((sitecode & 0xFF) != sitecode) {
+ sitecode &= 0xFF;
+ PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
+ }
+
+ if ((usercode & 0xFFFF) != usercode) {
+ usercode &= 0xFFFF;
+ PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
+ }
+
+ if ( !GetPrescoBits(sitecode, usercode, bs)) {
+ PrintAndLog("Error with tag bitstream generation.");
+ return 1;
+ }
+
+ blocks[1] = bytebits_to_byte(bs,32);
+ blocks[2] = bytebits_to_byte(bs+32,32);
+ blocks[3] = bytebits_to_byte(bs+64,32);
+ blocks[4] = bytebits_to_byte(bs+96,32);
+
+ PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u", sitecode, usercode);
+ PrintAndLog("Blk | Data ");
+ PrintAndLog("----+------------");
+ PrintAndLog(" 00 | 0x%08x", blocks[0]);
+ PrintAndLog(" 01 | 0x%08x", blocks[1]);
+ PrintAndLog(" 02 | 0x%08x", blocks[2]);
+ PrintAndLog(" 03 | 0x%08x", blocks[3]);
+ PrintAndLog(" 04 | 0x%08x", blocks[4]);
+
+ // UsbCommand resp;
+ // UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
+
+ // for (uint8_t i=0; i<5; i++) {
+ // c.arg[0] = blocks[i];
+ // c.arg[1] = i;
+ // clearCommandBuffer();
+ // SendCommand(&c);
+ // if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
+ // PrintAndLog("Error occurred, device did not respond during write operation.");
+ // return -1;
+ // }
+ // }
+ return 0;
+}
+
+int CmdPrescoSim(const char *Cmd) {
+ // uint32_t id = 0;
+ // uint64_t rawID = 0;
+ // uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
+
+ // char cmdp = param_getchar(Cmd, 0);
+ // if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_presco_sim();
+
+ // id = param_get32ex(Cmd, 0, 0, 16);
+ // if (id == 0) return usage_lf_presco_sim();
+
+ //rawID = getVikingBits(id);
+
+ // uint16_t arg1, arg2;
+ // size_t size = 64;
+ // arg1 = clk << 8 | encoding;
+ // arg2 = invert << 8 | separator;
+
+ // PrintAndLog("Simulating - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));
+
+ // UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
+ // num_to_bytebits(rawID, size, c.d.asBytes);
+ // clearCommandBuffer();
+ // SendCommand(&c);
+ return 0;
+}
+
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
+ {"read", CmdPrescoRead, 0, "Attempt to read and Extract tag data"},
+ {"clone", CmdPrescoClone, 0, "<8 digit ID number> clone presco tag"},
+// {"sim", CmdPrescoSim, 0, "<8 digit ID number> simulate presco tag"},
+ {NULL, NULL, 0, NULL}
+};
+
+int CmdLFPresco(const char *Cmd) {
+ CmdsParse(CommandTable, Cmd);
+ return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+ CmdsHelp(CommandTable);
+ return 0;
+}
projects / proxmark3-svn / commitdiff