]> cvs.zerfleddert.de Git - proxmark3-svn/blobdiff - client/cmdhf15.c
Updated the README.txt
[proxmark3-svn] / client / cmdhf15.c
index 298e47e28b9973426878b455c1795fb46c5d7def..76e1ea9cd539cfc89495ba747a33ddd3ae8b0e98 100644 (file)
@@ -1,7 +1,6 @@
 //-----------------------------------------------------------------------------
 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
-// Modified 2010 by <adrian -at- atrox.at>
-// Modified 2010, 2011 by <adrian -at- atrox.at>
+// Modified 2010-2012 by <adrian -at- atrox.at>
 // Modified 2012 by <vsza at vsza.hu>
 //
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include "proxusb.h"
+//#include "proxusb.h"
+#include "proxmark3.h"
 #include "data.h"
 #include "graph.h"
 #include "ui.h"
 #include "cmdparser.h"
 #include "cmdhf15.h"
-#include "iso15693tools.h"
+#include "../common/iso15693tools.h"
 #include "cmdmain.h"
 
 #define FrameSOF              Iso15693FrameSOF
@@ -44,8 +44,7 @@
 #define Crc(data,datalen)     Iso15693Crc(data,datalen)
 #define AddCrc(data,datalen)  Iso15693AddCrc(data,datalen)
 #define sprintUID(target,uid)  Iso15693sprintUID(target,uid)
-
-static int CmdHelp(const char *Cmd);
+#define TRACE_BUFF_SIZE 12000
 
 // structure and database for uid -> tagtype lookups 
 typedef struct { 
@@ -56,17 +55,21 @@ typedef struct {
 
 
 const productName uidmapping[] = {
+       // UID, #significant Bits, "Vendor(+Product)"
        { 0xE001000000000000LL, 16, "Motorola" },
        { 0xE002000000000000LL, 16, "ST Microelectronics" },
        { 0xE003000000000000LL, 16, "Hitachi" },
-       { 0xE004000000000000LL, 16, "Philips" },
-       { 0xE004010000000000LL, 24, "Philips; IC SL2 ICS20" },
+       { 0xE004000000000000LL, 16, "NXP(Philips)" },
+       { 0xE004010000000000LL, 24, "NXP(Philips); IC SL2 ICS20/ICS21(SLI) ICS2002/ICS2102(SLIX)" },
+       { 0xE004020000000000LL, 24, "NXP(Philips); IC SL2 ICS53/ICS54(SLI-S) ICS5302/ICS5402(SLIX-S)" },
+       { 0xE004030000000000LL, 24, "NXP(Philips); IC SL2 ICS50/ICS51(SLI-L) ICS5002/ICS5102(SLIX-L)" },
        { 0xE005000000000000LL, 16, "Infineon" },
        { 0xE005400000000000LL, 24, "Infineon; 56x32bit" },
        { 0xE006000000000000LL, 16, "Cylinc" },
        { 0xE007000000000000LL, 16, "Texas Instrument; " },
        { 0xE007000000000000LL, 20, "Texas Instrument; Tag-it HF-I Plus Inlay; 64x32bit" },
        { 0xE007100000000000LL, 20, "Texas Instrument; Tag-it HF-I Plus Chip; 64x32bit" },
+       { 0xE007800000000000LL, 23, "Texas Instrument; Tag-it HF-I Plus (RF-HDT-DVBB tag or Third Party Products)" },
        { 0xE007C00000000000LL, 23, "Texas Instrument; Tag-it HF-I Standard; 8x32bit" },
        { 0xE007C40000000000LL, 23, "Texas Instrument; Tag-it HF-I Pro; 8x23bit; password" },   
        { 0xE008000000000000LL, 16, "Fujitsu" },
@@ -80,8 +83,10 @@ const productName uidmapping[] = {
        { 0xE010000000000000LL, 16, "LG-Semiconductors" },
        { 0xE012000000000000LL, 16, "HID Corporation" },
        { 0xE016000000000000LL, 16, "EM-Marin SA (Skidata)" },
-       { 0xE016040000000000LL, 24, "EM-Marin SA (Skidata Keycard-eco); no memory" },
+       { 0xE016040000000000LL, 24, "EM-Marin SA (Skidata Keycard-eco); EM4034? no 'read', just 'readmulti'" },
+       { 0xE0160c0000000000LL, 24, "EM-Marin SA; EM4035?" },
        { 0xE016100000000000LL, 24, "EM-Marin SA (Skidata); EM4135; 36x64bit start page 13" },
+       { 0xE016940000000000LL, 24, "EM-Marin SA (Skidata); 51x64bit" },
        { 0,0,"no tag-info available" } // must be the last entry
 };
 
@@ -91,7 +96,7 @@ const productName uidmapping[] = {
 // returns 1 if suceeded
 int getUID(uint8_t *buf) 
 {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -108,11 +113,9 @@ int getUID(uint8_t *buf)
        
                SendCommand(&c);
                
-               r=WaitForResponseTimeout(CMD_ACK,1000);
-               
-               if (r!=NULL) {
-                       recv = r->d.asBytes;
-                       if (r->arg[0]>=12 && ISO15_CRC_CHECK==Crc(recv,12)) {
+               if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
+                       recv = resp.d.asBytes;
+                       if (resp.arg[0]>=12 && ISO15_CRC_CHECK==Crc(recv,12)) {
                           memcpy(buf,&recv[2],8);
                           return 1;
                        } 
@@ -252,6 +255,17 @@ int CmdHF15Read(const char *Cmd)
 {
        UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693};
        SendCommand(&c);
+
+       uint8_t data[TRACE_BUFF_SIZE] = {0x00};
+       
+       GetFromBigBuf(data,TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
+       WaitForResponseTimeout(CMD_ACK,NULL, 1500);
+
+       for (int j = 0; j < TRACE_BUFF_SIZE; j++) {
+               GraphBuffer[j] = ((int)data[j]) ;
+       }
+       GraphTraceLen = TRACE_BUFF_SIZE;
+       RepaintGraphWindow();
        return 0;
 }
 
@@ -260,6 +274,17 @@ int CmdHF15Record(const char *Cmd)
 {
        UsbCommand c = {CMD_RECORD_RAW_ADC_SAMPLES_ISO_15693};
        SendCommand(&c);
+
+       uint8_t data[TRACE_BUFF_SIZE] = {0x00};
+       
+       GetFromBigBuf(data,TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
+       WaitForResponseTimeout(CMD_ACK,NULL, 1500);
+
+       for (int j = 0; j < TRACE_BUFF_SIZE; j++) {
+               GraphBuffer[j] = ((int)data[j]) ;
+       }
+       GraphTraceLen = TRACE_BUFF_SIZE;
+       RepaintGraphWindow();
        return 0;
 }
 
@@ -273,7 +298,28 @@ int CmdHF15Reader(const char *Cmd)
 // Simulation is still not working very good
 int CmdHF15Sim(const char *Cmd)
 {
-       UsbCommand c = {CMD_SIMTAG_ISO_15693, {strtol(Cmd, NULL, 0), 0, 0}};
+       char cmdp = param_getchar(Cmd, 0);
+       uint8_t uid[8] = {0x00};
+
+       //E0 16 24 00 00 00 00 00
+       if (cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  hf 15 sim <UID>");
+               PrintAndLog("");
+               PrintAndLog("     sample: hf 15 sim E016240000000000");
+               return 0;
+       }
+
+       if (param_gethex(Cmd, 0, uid, 16)) {
+               PrintAndLog("UID must include 16 HEX symbols");
+               return 0;
+       }
+       
+       PrintAndLog("Starting simulating UID %02X %02X %02X %02X %02X %02X %02X %02X",
+                       uid[0],uid[1],uid[2],uid[3],uid[4], uid[5], uid[6], uid[7]);
+
+       UsbCommand c = {CMD_SIMTAG_ISO_15693, {0, 0, 0}};
+       memcpy(c.d.asBytes,uid,8);
+       
        SendCommand(&c);
        return 0;
 }
@@ -289,7 +335,7 @@ int CmdHF15Afi(const char *Cmd)
 
 // Reads all memory pages
 int CmdHF15DumpMem(const char*Cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t uid[8]; 
        uint8_t *recv=NULL;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
@@ -318,20 +364,18 @@ int CmdHF15DumpMem(const char*Cmd) {
        
                SendCommand(&c);
                
-               r=WaitForResponseTimeout(CMD_ACK,1000);
-               
-               if (r!=NULL) {
-                       recv = r->d.asBytes;
-                       if (ISO15_CRC_CHECK==Crc(recv,r->arg[0])) {
+               if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
+                       recv = resp.d.asBytes;
+                       if (ISO15_CRC_CHECK==Crc(recv,resp.arg[0])) {
                                if (!(recv[0] & ISO15_RES_ERROR)) {
                                        retry=0;
                                        *output=0; // reset outputstring
-                                       sprintf(output, "Block %2i   ",blocknum);
-                                       for ( int i=1; i<r->arg[0]-2; i++) { // data in hex
-                                               sprintf(output+strlen(output),"%02hX ",recv[i]);                                        
+                                       sprintf(output, "Block %02x   ",blocknum);
+                                       for ( int i=1; i<resp.arg[0]-2; i++) { // data in hex
+                                               sprintf(output+strlen(output),"%02X ",recv[i]);
                                        }                                       
                                        strcat(output,"   "); 
-                                       for ( int i=1; i<r->arg[0]-2; i++) { // data in cleaned ascii
+                                       for ( int i=1; i<resp.arg[0]-2; i++) { // data in cleaned ascii
                                                sprintf(output+strlen(output),"%c",(recv[i]>31 && recv[i]<127)?recv[i]:'.');                                    
                                        }                                       
                                        PrintAndLog("%s",output);       
@@ -343,14 +387,14 @@ int CmdHF15DumpMem(const char*Cmd) {
                                }
                        } // else PrintAndLog("crc");
                } // else PrintAndLog("r null");
-               
        } // retry
-       if (r && r->arg[0]<3) 
-               PrintAndLog("Lost Connection");
-       else if (r && ISO15_CRC_CHECK!=Crc(r->d.asBytes,r->arg[0]))
-               PrintAndLog("CRC Failed");
-       else 
-               PrintAndLog("Tag returned Error %i: %s",recv[1],TagErrorStr(recv[1])); 
+  // TODO: need fix
+//     if (resp.arg[0]<3)
+//             PrintAndLog("Lost Connection");
+//     else if (ISO15_CRC_CHECK!=Crc(resp.d.asBytes,resp.arg[0]))
+//             PrintAndLog("CRC Failed");
+//     else 
+//             PrintAndLog("Tag returned Error %i: %s",recv[1],TagErrorStr(recv[1])); 
        return 0;
 }
 
@@ -389,7 +433,7 @@ int CmdHF15Help(const char *Cmd)
 
 int CmdHF15CmdInquiry(const char *Cmd) 
 {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -404,15 +448,13 @@ int CmdHF15CmdInquiry(const char *Cmd)
 
        SendCommand(&c);
        
-       r=WaitForResponseTimeout(CMD_ACK,1000);
-       
-       if (r!=NULL) {
-               if (r->arg[0]>=12) {
-                  recv = r->d.asBytes;
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
+               if (resp.arg[0]>=12) {
+                  recv = resp.d.asBytes;
                   PrintAndLog("UID=%s",sprintUID(NULL,&recv[2]));
                   PrintAndLog("Tag Info: %s",getTagInfo(&recv[2]));    
                } else {
-                       PrintAndLog("Response to short, just %i bytes. No tag?\n",r->arg[0]);           
+                       PrintAndLog("Response to short, just %i bytes. No tag?\n",resp.arg[0]);
                }
        } else {
                PrintAndLog("timeout.");
@@ -425,8 +467,9 @@ int CmdHF15CmdInquiry(const char *Cmd)
 int CmdHF15CmdDebug( const char *cmd) {
        int debug=atoi(cmd);
        if (strlen(cmd)<1) {
-               PrintAndLog("Usage: hf 15 cmd debug  <0/1>");
-               PrintAndLog("   0..no debugging output  1..turn debugging on"); 
+               PrintAndLog("Usage: hf 15 cmd debug  <0|1>");
+               PrintAndLog("   0 no debugging");
+               PrintAndLog("   1 turn debugging on");  
                return 0;
        }
 
@@ -437,7 +480,7 @@ int CmdHF15CmdDebug( const char *cmd) {
 
 
 int CmdHF15CmdRaw (const char *cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        int reply=1;
@@ -512,15 +555,13 @@ int CmdHF15CmdRaw (const char *cmd) {
        SendCommand(&c);
        
        if (reply) {
-               r=WaitForResponseTimeout(CMD_ACK,1000);
-       
-               if (r!=NULL) {
-                       recv = r->d.asBytes;
-                       PrintAndLog("received %i octets",r->arg[0]);
-                       hexout = (char *)malloc(r->arg[0] * 3 + 1);
+               if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
+                       recv = resp.d.asBytes;
+                       PrintAndLog("received %i octets",resp.arg[0]);
+                       hexout = (char *)malloc(resp.arg[0] * 3 + 1);
                        if (hexout != NULL) {
-                               for (int i = 0; i < r->arg[0]; i++) { // data in hex
-                                       sprintf(&hexout[i * 3], "%02hX ", recv[i]);
+                               for (int i = 0; i < resp.arg[0]; i++) { // data in hex
+                                       sprintf(&hexout[i * 3], "%02X ", recv[i]);
                                }
                                PrintAndLog("%s", hexout);
                                free(hexout);
@@ -534,10 +575,16 @@ int CmdHF15CmdRaw (const char *cmd) {
 }
 
 
+/**
+ * parses common HF 15 CMD parameters and prepares some data structures
+ * Parameters:
+ *  **cmd      command line
+ */
 int prepareHF15Cmd(char **cmd, UsbCommand *c, uint8_t iso15cmd[], int iso15cmdlen) {
        int temp;
-       uint8_t *req=c->d.asBytes, uid[8];
-       uint32_t reqlen=0;
+       uint8_t *req = c->d.asBytes;
+       uint8_t uid[8] = {0x00};
+       uint32_t reqlen = 0;
 
        // strip
        while (**cmd==' ' || **cmd=='\t') (*cmd)++;
@@ -622,14 +669,12 @@ int prepareHF15Cmd(char **cmd, UsbCommand *c, uint8_t iso15cmd[], int iso15cmdle
        return 1;
 }
 
-
-
 /**
  * Commandline handling: HF15 CMD SYSINFO
  * get system information from tag/VICC
  */
 int CmdHF15CmdSysinfo(const char *Cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -643,7 +688,7 @@ int CmdHF15CmdSysinfo(const char *Cmd) {
 
        // usage:
        if (strlen(cmd)<1) {
-               PrintAndLog("Usage:  hf 15 cmd sysinfo    [options] <uid|s|*>");
+               PrintAndLog("Usage:  hf 15 cmd sysinfo    [options] <uid|s|u|*>");
                PrintAndLog("           options:");
                PrintAndLog("               -2        use slower '1 out of 256' mode");
                PrintAndLog("           uid (either): ");
@@ -664,15 +709,13 @@ int CmdHF15CmdSysinfo(const char *Cmd) {
 
        SendCommand(&c);
 
-       r=WaitForResponseTimeout(CMD_ACK,1000);
-       
-       if (r!=NULL && r->arg[0]>2) {
-               recv = r->d.asBytes;
-               if (ISO15_CRC_CHECK==Crc(recv,r->arg[0])) {
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1000) && resp.arg[0]>2) {
+               recv = resp.d.asBytes;
+               if (ISO15_CRC_CHECK==Crc(recv,resp.arg[0])) {
                        if (!(recv[0] & ISO15_RES_ERROR)) {
                                *output=0; // reset outputstring
-                               for ( i=1; i<r->arg[0]-2; i++) {
-                                       sprintf(output+strlen(output),"%02hX ",recv[i]);                                        
+                               for ( i=1; i<resp.arg[0]-2; i++) {
+                                       sprintf(output+strlen(output),"%02X ",recv[i]);
                                }                                       
                                strcat(output,"\n\r");
                                strcat(output,"UID = ");
@@ -682,11 +725,11 @@ int CmdHF15CmdSysinfo(const char *Cmd) {
                                strcat(output,"\n\r");
                                i=10;
                                if (recv[1] & 0x01) 
-                                       sprintf(output+strlen(output),"DSFID supported, set to %02hX\n\r",recv[i++]);
+                                       sprintf(output+strlen(output),"DSFID supported, set to %02X\n\r",recv[i++]);
                                else 
                                        strcat(output,"DSFID not supported\n\r");
                                if (recv[1] & 0x02) 
-                                       sprintf(output+strlen(output),"AFI supported, set to %03hX\n\r",recv[i++]);
+                                       sprintf(output+strlen(output),"AFI supported, set to %03X\n\r",recv[i++]);
                                else 
                                        strcat(output,"AFI not supported\n\r");
                                if (recv[1] & 0x04) {
@@ -696,7 +739,7 @@ int CmdHF15CmdSysinfo(const char *Cmd) {
                                        i+=2;
                                } else 
                                        strcat(output,"Tag does not provide information on memory layout\n\r");
-                               if (recv[1] & 0x08) sprintf(output+strlen(output),"IC reference given: %02hX\n\r",recv[i++]);
+                               if (recv[1] & 0x08) sprintf(output+strlen(output),"IC reference given: %02X\n\r",recv[i++]);
                                        else strcat(output,"IC reference not given\n\r");
 
 
@@ -714,13 +757,12 @@ int CmdHF15CmdSysinfo(const char *Cmd) {
        return 0;
 }
 
-
 /**
  * Commandline handling: HF15 CMD READMULTI
  * Read multiple blocks at once (not all tags support this)
  */
 int CmdHF15CmdReadmulti(const char *Cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -733,7 +775,7 @@ int CmdHF15CmdReadmulti(const char *Cmd) {
 
        // usage:
        if (strlen(cmd)<3) {
-               PrintAndLog("Usage:  hf 15 cmd readmulti  [options] <uid|s|*> <start#> <count#>");
+               PrintAndLog("Usage:  hf 15 cmd readmulti  [options] <uid|s|u|*> <start#> <count#>");
                PrintAndLog("           options:");
                PrintAndLog("               -2        use slower '1 out of 256' mode");
                PrintAndLog("           uid (either): ");
@@ -767,19 +809,17 @@ int CmdHF15CmdReadmulti(const char *Cmd) {
        c.arg[0]=reqlen;
 
        SendCommand(&c);
-       r=WaitForResponseTimeout(CMD_ACK,1000);
-       
-       if (r!=NULL && r->arg[0]>2) {
-               recv = r->d.asBytes;
-               if (ISO15_CRC_CHECK==Crc(recv,r->arg[0])) {
+
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1000) && resp.arg[0]>2) {
+               recv = resp.d.asBytes;
+               if (ISO15_CRC_CHECK==Crc(recv,resp.arg[0])) {
                        if (!(recv[0] & ISO15_RES_ERROR)) {
                                *output=0; // reset outputstring
-                               for ( int i=1; i<r->arg[0]-2; i++) {
-                                       sprintf(output+strlen(output),"%02hX ",recv[i]);                                        
+                               for ( int i=1; i<resp.arg[0]-2; i++) {
+                                       sprintf(output+strlen(output),"%02X ",recv[i]);
                                }                                       
                                strcat(output,"   ");
-                               for ( int i=1; i<r->arg[0]-2; i++) {
+                               for ( int i=1; i<resp.arg[0]-2; i++) {
                                        sprintf(output+strlen(output),"%c",recv[i]>31 && recv[i]<127?recv[i]:'.');                                      
                                }                                       
                                PrintAndLog("%s",output);       
@@ -796,13 +836,12 @@ int CmdHF15CmdReadmulti(const char *Cmd) {
        return 0;
 }
 
-
 /**
  * Commandline handling: HF15 CMD READ
  * Reads a single Block
  */
 int CmdHF15CmdRead(const char *Cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -815,7 +854,7 @@ int CmdHF15CmdRead(const char *Cmd) {
 
        // usage:
        if (strlen(cmd)<3) {
-               PrintAndLog("Usage:  hf 15 cmd read    [options] <uid|s|*> <page#>");
+               PrintAndLog("Usage:  hf 15 cmd read    [options] <uid|s|u|*> <page#>");
                PrintAndLog("           options:");
                PrintAndLog("               -2        use slower '1 out of 256' mode");
                PrintAndLog("           uid (either): ");
@@ -844,19 +883,17 @@ int CmdHF15CmdRead(const char *Cmd) {
 
        SendCommand(&c);
 
-       r=WaitForResponseTimeout(CMD_ACK,1000);
-       
-       if (r!=NULL && r->arg[0]>2) {
-               recv = r->d.asBytes;
-               if (ISO15_CRC_CHECK==Crc(recv,r->arg[0])) {
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1000) && resp.arg[0]>2) {
+               recv = resp.d.asBytes;
+               if (ISO15_CRC_CHECK==Crc(recv,resp.arg[0])) {
                        if (!(recv[0] & ISO15_RES_ERROR)) {
                                *output=0; // reset outputstring
                                //sprintf(output, "Block %2i   ",blocknum);
-                               for ( int i=1; i<r->arg[0]-2; i++) {
-                                       sprintf(output+strlen(output),"%02hX ",recv[i]);                                        
+                               for ( int i=1; i<resp.arg[0]-2; i++) {
+                                       sprintf(output+strlen(output),"%02X ",recv[i]);
                                }                                       
                                strcat(output,"   ");
-                               for ( int i=1; i<r->arg[0]-2; i++) {
+                               for ( int i=1; i<resp.arg[0]-2; i++) {
                                        sprintf(output+strlen(output),"%c",recv[i]>31 && recv[i]<127?recv[i]:'.');                                      
                                }                                       
                                PrintAndLog("%s",output);       
@@ -879,7 +916,7 @@ int CmdHF15CmdRead(const char *Cmd) {
  * Writes a single Block - might run into timeout, even when successful
  */
 int CmdHF15CmdWrite(const char *Cmd) {
-       UsbCommand *r;  
+       UsbCommand resp;
        uint8_t *recv;
        UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
        uint8_t *req=c.d.asBytes;
@@ -892,7 +929,7 @@ int CmdHF15CmdWrite(const char *Cmd) {
 
        // usage:
        if (strlen(cmd)<3) {
-               PrintAndLog("Usage:  hf 15 cmd write    [options] <uid|s|*> <page#> <hexdata>");
+               PrintAndLog("Usage:  hf 15 cmd write    [options] <uid|s|u|*> <page#> <hexdata>");
                PrintAndLog("           options:");
                PrintAndLog("               -2        use slower '1 out of 256' mode");
                PrintAndLog("               -o        set OPTION Flag (needed for TI)");
@@ -939,11 +976,9 @@ int CmdHF15CmdWrite(const char *Cmd) {
 
        SendCommand(&c);
 
-       r=WaitForResponseTimeout(CMD_ACK,2000);
-       
-       if (r!=NULL && r->arg[0]>2) {
-               recv = r->d.asBytes;
-               if (ISO15_CRC_CHECK==Crc(recv,r->arg[0])) {
+       if (WaitForResponseTimeout(CMD_ACK,&resp,2000) && resp.arg[0]>2) {
+               recv = resp.d.asBytes;
+               if (ISO15_CRC_CHECK==Crc(recv,resp.arg[0])) {
                        if (!(recv[0] & ISO15_RES_ERROR)) {                                     
                                PrintAndLog("OK");      
                        } else {
@@ -971,7 +1006,7 @@ static command_t CommandTable15Cmd[] =
        {"read",    CmdHF15CmdRead,    0, "Read a block"},      
        {"write",   CmdHF15CmdWrite,    0, "Write a block"},    
        {"readmulti",CmdHF15CmdReadmulti,    0, "Reads multiple Blocks"},
-       {"sysinfo",      CmdHF15CmdSysinfo,     0,      "Get Card Information"},
+       {"sysinfo",CmdHF15CmdSysinfo,    0, "Get Card Information"},
        {"raw",          CmdHF15CmdRaw,         0,      "Send raw hex data to tag"}, 
        {"debug",    CmdHF15CmdDebug,    0, "Turn debugging on/off"},
        {NULL, NULL, 0, NULL}
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