//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
-// Modified 2010 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,
// at your option, any later version. See the LICENSE.txt file for the text of
#include <stdlib.h>
#include <string.h>
#include <stdint.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
#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 {
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" },
{ 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
};
// 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;
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;
}
{
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;
}
{
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;
}
// 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;
}
// 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?
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);
}
} // 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;
}
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;
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.");
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;
}
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;
int i=0;
uint8_t data[100];
unsigned int datalen=0, temp;
+ char *hexout;
if (strlen(cmd)<3) {
SendCommand(&c);
if (reply) {
- r=WaitForResponseTimeout(CMD_ACK,1000);
-
- if (r!=NULL) {
- recv = r->d.asBytes;
- PrintAndLog("received %i octets",r->arg[0]);
- // TODO: output
+ 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 < resp.arg[0]; i++) { // data in hex
+ sprintf(&hexout[i * 3], "%02X ", recv[i]);
+ }
+ PrintAndLog("%s", hexout);
+ free(hexout);
+ }
} else {
PrintAndLog("timeout while waiting for reply.");
}
}
+/**
+ * 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)++;
if (strstr(*cmd,"-2")==*cmd) {
- c->arg[1]=0; // quse 1of256
+ c->arg[1]=0; // use 1of256
(*cmd)+=2;
}
reqlen+=iso15cmdlen;
break;
case '*':
+ // we scan for the UID ourself
req[reqlen++]|= ISO15_REQ_SUBCARRIER_SINGLE | ISO15_REQ_DATARATE_HIGH |
ISO15_REQ_NONINVENTORY | ISO15_REQ_ADDRESS;
memcpy(&req[reqlen],&iso15cmd[0],iso15cmdlen);
return 1;
}
+/**
+ * Commandline handling: HF15 CMD SYSINFO
+ * get system information from tag/VICC
+ */
+int CmdHF15CmdSysinfo(const char *Cmd) {
+ UsbCommand resp;
+ uint8_t *recv;
+ UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
+ uint8_t *req=c.d.asBytes;
+ int reqlen=0;
+ char cmdbuf[100];
+ char *cmd=cmdbuf;
+ char output[2048]="";
+ int i;
+
+ strncpy(cmd,Cmd,99);
+
+ // usage:
+ if (strlen(cmd)<1) {
+ PrintAndLog("Usage: hf 15 cmd sysinfo [options] <uid|s|u|*>");
+ PrintAndLog(" options:");
+ PrintAndLog(" -2 use slower '1 out of 256' mode");
+ PrintAndLog(" uid (either): ");
+ PrintAndLog(" <8B hex> full UID eg E011223344556677");
+ PrintAndLog(" s selected tag");
+ PrintAndLog(" u unaddressed mode");
+ PrintAndLog(" * scan for tag");
+ PrintAndLog(" start#: page number to start 0-255");
+ PrintAndLog(" count#: number of pages");
+ return 0;
+ }
+
+ prepareHF15Cmd(&cmd, &c,(uint8_t[]){ISO15_CMD_SYSINFO},1);
+ reqlen=c.arg[0];
+
+ reqlen=AddCrc(req,reqlen);
+ c.arg[0]=reqlen;
+
+ SendCommand(&c);
+
+ 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<resp.arg[0]-2; i++) {
+ sprintf(output+strlen(output),"%02X ",recv[i]);
+ }
+ strcat(output,"\n\r");
+ strcat(output,"UID = ");
+ strcat(output,sprintUID(NULL,recv+2));
+ strcat(output,"\n\r");
+ strcat(output,getTagInfo(recv+2)); //ABC
+ strcat(output,"\n\r");
+ i=10;
+ if (recv[1] & 0x01)
+ 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 %03X\n\r",recv[i++]);
+ else
+ strcat(output,"AFI not supported\n\r");
+ if (recv[1] & 0x04) {
+ strcat(output,"Tag provides info on memory layout (vendor dependent)\n\r");
+ sprintf(output+strlen(output)," %i (or %i) bytes/page x %i pages \n\r",
+ (recv[i+1]&0x1F)+1, (recv[i+1]&0x1F), recv[i]+1);
+ 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: %02X\n\r",recv[i++]);
+ else strcat(output,"IC reference not given\n\r");
+
+
+ PrintAndLog("%s",output);
+ } else {
+ PrintAndLog("Tag returned Error %i: %s",recv[0],TagErrorStr(recv[0]));
+ }
+ } else {
+ PrintAndLog("CRC failed");
+ }
+ } else {
+ PrintAndLog("timeout: no answer");
+ }
+
+ return 0;
+}
+
+/**
+ * Commandline handling: HF15 CMD READMULTI
+ * Read multiple blocks at once (not all tags support this)
+ */
+int CmdHF15CmdReadmulti(const char *Cmd) {
+ UsbCommand resp;
+ uint8_t *recv;
+ UsbCommand c = {CMD_ISO_15693_COMMAND, {0, 1, 1}}; // len,speed,recv?
+ uint8_t *req=c.d.asBytes;
+ int reqlen=0, pagenum,pagecount;
+ char cmdbuf[100];
+ char *cmd=cmdbuf;
+ char output[2048]="";
+
+ strncpy(cmd,Cmd,99);
+
+ // usage:
+ if (strlen(cmd)<3) {
+ 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): ");
+ PrintAndLog(" <8B hex> full UID eg E011223344556677");
+ PrintAndLog(" s selected tag");
+ PrintAndLog(" u unaddressed mode");
+ PrintAndLog(" * scan for tag");
+ PrintAndLog(" start#: page number to start 0-255");
+ PrintAndLog(" count#: number of pages");
+ return 0;
+ }
+
+ prepareHF15Cmd(&cmd, &c,(uint8_t[]){ISO15_CMD_READMULTI},1);
+ reqlen=c.arg[0];
+
+ pagenum=strtol(cmd,NULL,0);
+
+ // skip to next space
+ while (*cmd!=' ' && *cmd!='\t') cmd++;
+ // skip over the space
+ while (*cmd==' ' || *cmd=='\t') cmd++;
+
+ pagecount=strtol(cmd,NULL,0);
+ if (pagecount>0) pagecount--; // 0 means 1 page, 1 means 2 pages, ...
+
+ req[reqlen++]=(uint8_t)pagenum;
+ req[reqlen++]=(uint8_t)pagecount;
+
+ reqlen=AddCrc(req,reqlen);
+
+ c.arg[0]=reqlen;
+ SendCommand(&c);
+ 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<resp.arg[0]-2; i++) {
+ sprintf(output+strlen(output),"%02X ",recv[i]);
+ }
+ strcat(output," ");
+ 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);
+ } else {
+ PrintAndLog("Tag returned Error %i: %s",recv[0],TagErrorStr(recv[0]));
+ }
+ } else {
+ PrintAndLog("CRC failed");
+ }
+ } else {
+ PrintAndLog("no answer");
+ }
+
+ 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;
// 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): ");
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=2; 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);
}
+/**
+ * Commandline handling: HF15 CMD WRITE
+ * 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;
// 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)");
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 {
PrintAndLog("CRC failed");
}
} else {
- PrintAndLog("no answer");
+ PrintAndLog("timeout: no answer - data may be written anyway");
}
return 0;
*/
{"read", CmdHF15CmdRead, 0, "Read a block"},
{"write", CmdHF15CmdWrite, 0, "Write a block"},
-/*
{"readmulti",CmdHF15CmdReadmulti, 0, "Reads multiple Blocks"},
-*/
+ {"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}
projects / proxmark3-svn / blobdiff