move idteck to its own file

client/src/cmdlfidteck.c

@@ -0,0 +1,136 @@
+//-----------------------------------------------------------------------------
+// Iceman,
+//
+// 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 Idteck tag commands
+// PSK
+//-----------------------------------------------------------------------------
+#include "cmdlfidteck.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "common.h"
+
+#include "cmdparser.h"    // command_t
+#include "comms.h"
+#include "ui.h"
+#include "cmddata.h"
+#include "cmdlf.h"
+#include "lfdemod.h"
+#include "commonutil.h"     // num_to_bytes
+
+static int CmdHelp(const char *Cmd);
+
+int demodIdteck(bool verbose) {
+    (void) verbose; // unused so far
+    if (PSKDemod(0, 0, 100, false) != PM3_SUCCESS) {
+        PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck PSKDemod failed");
+        return PM3_ESOFT;
+    }
+    size_t size = DemodBufferLen;
+
+    //get binary from PSK1 wave
+    int idx = detectIdteck(DemodBuffer, &size);
+    if (idx < 0) {
+
+        if (idx == -1)
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: not enough samples");
+        else if (idx == -2)
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: just noise");
+        else if (idx == -3)
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: preamble not found");
+        else if (idx == -4)
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: size not correct: %zu", size);
+        else
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: idx: %d", idx);
+
+        // if didn't find preamble try again inverting
+        if (PSKDemod(0, 1, 100, false) != PM3_SUCCESS) {
+            PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck PSKDemod failed");
+            return PM3_ESOFT;
+        }
+        idx = detectIdteck(DemodBuffer, &size);
+        if (idx < 0) {
+
+            if (idx == -1)
+                PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: not enough samples");
+            else if (idx == -2)
+                PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: just noise");
+            else if (idx == -3)
+                PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: preamble not found");
+            else if (idx == -4)
+                PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: size not correct: %zu", size);
+            else
+                PrintAndLogEx(DEBUG, "DEBUG: Error - Idteck: idx: %d", idx);
+
+            return PM3_ESOFT;
+        }
+    }
+    setDemodBuff(DemodBuffer, 64, idx);
+
+    //got a good demod
+    uint32_t id = 0;
+    uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
+    uint32_t raw2 = bytebits_to_byte(DemodBuffer + 32, 32);
+
+    //parity check (TBD)
+    //checksum check (TBD)
+
+    //output
+    PrintAndLogEx(SUCCESS, "IDTECK Tag Found: Card ID %u ,  Raw: %08X%08X", id, raw1, raw2);
+    return PM3_SUCCESS;
+}
+
+static int CmdIdteckDemod(const char *Cmd) {
+    (void)Cmd; // Cmd is not used so far
+    return demodIdteck(true);
+}
+
+static int CmdIdteckRead(const char *Cmd) {
+    (void)Cmd;
+    lf_read(false, 5000);
+    return demodIdteck(true);
+}
+
+static command_t CommandTable[] = {
+    {"help",    CmdHelp,        AlwaysAvailable, "This help"},
+    {"demod",   CmdIdteckDemod, AlwaysAvailable, "Demodulate an Idteck tag from the GraphBuffer"},
+    {"read",    CmdIdteckRead,  IfPm3Lf,         "Attempt to read and Extract tag data from the antenna"},
+    {NULL, NULL, NULL, NULL}
+};
+
+static int CmdHelp(const char *Cmd) {
+    (void)Cmd; // Cmd is not used so far
+    CmdsHelp(CommandTable);
+    return PM3_SUCCESS;
+}
+
+int CmdLFIdteck(const char *Cmd) {
+    clearCommandBuffer();
+    return CmdsParse(CommandTable, Cmd);
+}
+
+// Find IDTEC PSK1, RF  Preamble == 0x4944544B, Demodsize 64bits
+// by iceman
+int detectIdteck(uint8_t *dest, size_t *size) {
+    //make sure buffer has data
+    if (*size < 64 * 2) return -1;
+
+    if (getSignalProperties()->isnoise) return -2;
+
+    size_t start_idx = 0;
+    uint8_t preamble[] = {0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1};
+
+    //preamble not found
+    if (!preambleSearch(dest, preamble, sizeof(preamble), size, &start_idx))
+        return -3;
+
+    // wrong demoded size
+    if (*size != 64) return -4;
+    return (int)start_idx;
+}