CHG: this timing should be quite good. needs to be verified.

[proxmark3-svn] / client / cmdhflegic.c

diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index f23f7da0c29094aaf6bf827e0f76aeb149d137b5..bbdd091ee18756ef09fecf0bdaf67dd471ad0603 100644 (file)
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -11,11 +11,15 @@
 
 static int CmdHelp(const char *Cmd);
 
 
 static int CmdHelp(const char *Cmd);
 

+#define SESSION_IV 0x55
+#define MAX_LENGTH 1024        
+

 int usage_legic_calccrc8(void){
        PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
        PrintAndLog("There must be an even number of hexsymbols as input.");
        PrintAndLog("Usage:  hf legic crc8 [h] b <hexbytes> u <uidcrc> c <crc type>");
        PrintAndLog("Options:");
 int usage_legic_calccrc8(void){
        PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
        PrintAndLog("There must be an even number of hexsymbols as input.");
        PrintAndLog("Usage:  hf legic crc8 [h] b <hexbytes> u <uidcrc> c <crc type>");
        PrintAndLog("Options:");

+       PrintAndLog("      h             : this help");

        PrintAndLog("      b <hexbytes>  : hex bytes");
        PrintAndLog("      u <uidcrc>    : MCC hexbyte");
        PrintAndLog("      c <crc type>  : 8|16 bit crc size");
        PrintAndLog("      b <hexbytes>  : hex bytes");
        PrintAndLog("      u <uidcrc>    : MCC hexbyte");
        PrintAndLog("      c <crc type>  : 8|16 bit crc size");


@@ -25,35 +29,65 @@ int usage_legic_calccrc8(void){
        PrintAndLog("      hf legic crc8 b deadbeef1122 u 9A c 16");
        return 0;
 }
        PrintAndLog("      hf legic crc8 b deadbeef1122 u 9A c 16");
        return 0;
 }

-

 int usage_legic_load(void){
        PrintAndLog("It loads datasamples from the file `filename` to device memory");
 int usage_legic_load(void){
        PrintAndLog("It loads datasamples from the file `filename` to device memory");

-       PrintAndLog("Usage:  hf legic load <file name>");
+       PrintAndLog("Usage:  hf legic load [h] <file name>");
+       PrintAndLog("Options:");
+       PrintAndLog("  h             : this help");
+       PrintAndLog("  <filename>    : Name of file to load");

        PrintAndLog("");
        PrintAndLog("Samples:");
        PrintAndLog("      hf legic load filename");
        return 0;
 }
        PrintAndLog("");
        PrintAndLog("Samples:");
        PrintAndLog("      hf legic load filename");
        return 0;
 }

-

 int usage_legic_read(void){    
        PrintAndLog("Read data from a legic tag.");
 int usage_legic_read(void){    
        PrintAndLog("Read data from a legic tag.");

-       PrintAndLog("Usage:  hf legic read <offset> <num of bytes>");
+       PrintAndLog("Usage:  hf legic read [h] <offset> <length> <IV>");

        PrintAndLog("Options:");
        PrintAndLog("Options:");

-       PrintAndLog("  <offset>        : offset in data array to start download from");
-       PrintAndLog("  <num of bytes>  : number of bytes to download");
+       PrintAndLog("  h             : this help");
+       PrintAndLog("  <offset>      : offset in data array to start download from");
+       PrintAndLog("  <length>      : number of bytes to download");
+       PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");

        PrintAndLog("");
        PrintAndLog("Samples:");
        PrintAndLog("      hf legic read");
        PrintAndLog("");
        PrintAndLog("Samples:");
        PrintAndLog("      hf legic read");

+       PrintAndLog("      hf legic read 10 4");

        return 0;
 }
        return 0;
 }

-

 int usage_legic_sim(void){
 int usage_legic_sim(void){

+       PrintAndLog("Missing help text.");
+       return 0;
+}
+int usage_legic_write(void){
+       PrintAndLog(" Write sample buffer to a legic tag. (use after load or read)");
+       PrintAndLog("Usage:  hf legic write [h] <offset> <length> <IV>");
+       PrintAndLog("Options:");
+       PrintAndLog("  h             : this help");
+       PrintAndLog("  <offset>      : offset in data array to start writing from");
+       PrintAndLog("  <length>      : number of bytes to write");
+       PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic write");
+       PrintAndLog("      hf legic write 10 4");

        return 0;
 }
 int usage_legic_rawwrite(void){
        return 0;
 }
 int usage_legic_rawwrite(void){

+       PrintAndLog("Write raw data direct to a specific address on legic tag.");
+       PrintAndLog("Usage:  hf legic writeraw [h] <address> <value> <IV>");
+       PrintAndLog("Options:");
+       PrintAndLog("  h             : this help");
+       PrintAndLog("  <address>     : address to write to");
+       PrintAndLog("  <value>       : value to write");
+       PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic writeraw");
+       PrintAndLog("      hf legic writeraw 10 4");

        return 0;
 }
 int usage_legic_fill(void){
        return 0;
 }
 int usage_legic_fill(void){

+       PrintAndLog("Missing help text.");

        return 0;
 }
 
        return 0;
 }
 


@@ -67,13 +101,13 @@ int CmdLegicDecode(const char *Cmd) {
        int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
        int crc = 0, wrp = 0, wrc = 0;
        uint8_t stamp_len = 0;
        int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
        int crc = 0, wrp = 0, wrc = 0;
        uint8_t stamp_len = 0;

-       uint8_t data_buf[1052]; // receiver buffer
+       uint8_t data_buf[1024]; // receiver buffer

        char token_type[5] = {0,0,0,0,0};
        int dcf = 0;
        int bIsSegmented = 0;
 
        char token_type[5] = {0,0,0,0,0};
        int dcf = 0;
        int bIsSegmented = 0;
 

-       // download EML memory, where the "legic read" command puts the data.
-       GetEMLFromBigBuf(data_buf, sizeof(data_buf), 0);
+       // copy data from proxmark into buffer
+       GetFromBigBuf(data_buf,sizeof(data_buf),0);

        if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
                PrintAndLog("Command execute timeout");
                return 1;
        if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
                PrintAndLog("Command execute timeout");
                return 1;


@@ -346,25 +380,60 @@ int CmdLegicDecode(const char *Cmd) {
 }
 
 int CmdLegicRFRead(const char *Cmd) {
 }
 
 int CmdLegicRFRead(const char *Cmd) {

-       
+

        // params:
        // offset in data
        // number of bytes.
        char cmdp = param_getchar(Cmd, 0);
        if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read();
        
        // params:
        // offset in data
        // number of bytes.
        char cmdp = param_getchar(Cmd, 0);
        if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read();
        

-       int byte_count = 0, offset = 0;
-       sscanf(Cmd, "%i %i", &offset, &byte_count);
-       if(byte_count == 0) byte_count = -1;
-       if(byte_count + offset > 1024) byte_count = 1024 - offset;
+       uint32_t offset = 0, len = 0, IV = 1;
+       sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
+
+       // OUT-OF-BOUNDS check
+       if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
+       
+       if ( (IV & 0x7F) != IV ){
+               IV &= 0x7F;
+               PrintAndLog("Truncating IV to 7bits");
+       }
+       if ( (IV & 1) == 0 ){
+               IV |= 0x01;  // IV must be odd
+               PrintAndLog("LSB of IV must be SET");   
+       }
+       PrintAndLog("Current IV: 0x%02x", IV);
+       
+       // get some  prng bytes from 
+       uint8_t temp[12];
+       legic_prng_init(IV);
+       for ( uint8_t j = 0; j < sizeof(temp); ++j)
+               temp[j] = legic_prng_get_bits(8);

 
 

-       UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
+       PrintAndLog("PRNG: %s", sprint_hex(temp, sizeof(temp)));
+       
+       UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};

        clearCommandBuffer();
        SendCommand(&c);
        clearCommandBuffer();
        SendCommand(&c);

+       UsbCommand resp;
+       if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+               uint8_t isOK = resp.arg[0] & 0xFF;
+               uint16_t len = resp.arg[1] & 0x3FF;
+               if ( isOK ) {
+                       PrintAndLog("OK : %d", isOK);
+                       PrintAndLog("use 'hf legic decode' or");
+                       PrintAndLog("'data hexsamples %d' to view results", len);       
+               }
+       } else {
+               PrintAndLog("command execution time out");
+               return 1;
+       }
+
+       //uint8_t got[12000];
+       //GetFromBigBuf(got,sizeof(got),0);
+       //WaitForResponse(CMD_ACK,NULL);

        return 0;
 }
 
        return 0;
 }
 

-

 int CmdLegicLoad(const char *Cmd) {
 
 // iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)  
 int CmdLegicLoad(const char *Cmd) {
 
 // iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)  


@@ -505,28 +574,78 @@ int CmdLegicRfSim(const char *Cmd) {
        return 0;
 }
 
        return 0;
 }
 

-//TODO: write a help text (iceman)

 int CmdLegicRfWrite(const char *Cmd) {
 int CmdLegicRfWrite(const char *Cmd) {

+
+       // params:
+       // offset - in tag memory
+       // length - num of bytes to be written
+       // IV - initialisation vector
+       
+       char cmdp = param_getchar(Cmd, 0);
+       if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_write();
+       
+       uint32_t offset = 0, len = 0, IV = 0;
+       

     UsbCommand c = {CMD_WRITER_LEGIC_RF, {0,0,0}};
     UsbCommand c = {CMD_WRITER_LEGIC_RF, {0,0,0}};

-    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
-       if(res != 2) {
-               PrintAndLog("Please specify the offset and length as two hex strings");
+    int res = sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
+       if(res < 2) {
+               PrintAndLog("Please specify the offset and length as two hex strings and, optionally, the IV also as an hex string");

         return -1;
     }
         return -1;
     }

+
+       // OUT-OF-BOUNDS check
+       if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
+
+       if ( (IV & 0x7F) != IV ){
+               IV &= 0x7F;
+               PrintAndLog("Truncating IV to 7bits");
+       }
+       if ( (IV & 1) == 0 ){
+               IV |= 0x01;  // IV must be odd
+               PrintAndLog("LSB of IV must be SET");   
+       }
+       
+       PrintAndLog("Current IV: 0x%02x", IV);
+       
+       c.arg[0] = offset;
+       c.arg[1] = len;
+    c.arg[2] = IV;
+       

        clearCommandBuffer();
     SendCommand(&c);
     return 0;
 }
 
        clearCommandBuffer();
     SendCommand(&c);
     return 0;
 }
 

-//TODO: write a help text (iceman)

 int CmdLegicRfRawWrite(const char *Cmd) {
 int CmdLegicRfRawWrite(const char *Cmd) {

+
+       char cmdp = param_getchar(Cmd, 0);
+       if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rawwrite();
+       
+       uint32_t address = 0, data = 0, IV = 0; 

        char answer;
        char answer;

+

     UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} };
     UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} };

-    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
-       if(res != 2) {
-               PrintAndLog("Please specify the offset and value as two hex strings");
-        return -1;
-    }
+    int res = sscanf(Cmd, "%x %x %x", &address, &data, &IV);
+       if(res < 2)
+               return usage_legic_rawwrite();
+
+       // OUT-OF-BOUNDS check
+       if(address > MAX_LENGTH)
+               return usage_legic_rawwrite();
+       
+       if ( (IV & 0x7F) != IV ){
+               IV &= 0x7F;
+               PrintAndLog("Truncating IV to 7bits");
+       }
+       if ( (IV & 1) == 0 ){
+               IV |= 0x01;  // IV must be odd
+               PrintAndLog("LSB of IV must be SET");   
+       }
+       PrintAndLog("Current IV: 0x%02x", IV);
+
+       c.arg[0] = address;
+       c.arg[1] = data;
+    c.arg[2] = IV;

        
        if (c.arg[0] == 0x05 || c.arg[0] == 0x06) {
                PrintAndLog("############# DANGER !! #############");
        
        if (c.arg[0] == 0x05 || c.arg[0] == 0x06) {
                PrintAndLog("############# DANGER !! #############");


@@ -659,12 +778,12 @@ int CmdLegicCalcCrc8(const char *Cmd){
 static command_t CommandTable[] =  {
        {"help",        CmdHelp,        1, "This help"},
        {"decode",      CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
 static command_t CommandTable[] =  {
        {"help",        CmdHelp,        1, "This help"},
        {"decode",      CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},

-       {"read",        CmdLegicRFRead, 0, "[offset][length] -- read bytes from a LEGIC card"},
+       {"read",        CmdLegicRFRead, 0, "[offset][length] <iv> -- read bytes from a LEGIC card"},

        {"save",        CmdLegicSave,   0, "<filename> [<length>] -- Store samples"},
        {"load",        CmdLegicLoad,   0, "<filename> -- Restore samples"},
        {"sim",         CmdLegicRfSim,  0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
        {"save",        CmdLegicSave,   0, "<filename> [<length>] -- Store samples"},
        {"load",        CmdLegicLoad,   0, "<filename> -- Restore samples"},
        {"sim",         CmdLegicRfSim,  0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},

-       {"write",       CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
-       {"writeRaw",CmdLegicRfRawWrite, 0, "<address> <value> -- Write direct to address"},
+       {"write",       CmdLegicRfWrite,0, "<offset> <length> <iv> -- Write sample buffer (user after load or read)"},
+       {"writeraw",CmdLegicRfRawWrite, 0, "<address> <value> <iv> -- Write direct to address"},

        {"fill",        CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
        {"crc8",        CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
        {NULL, NULL, 0, NULL}
        {"fill",        CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
        {"crc8",        CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
        {NULL, NULL, 0, NULL}