// High frequency iClass commands
//-----------------------------------------------------------------------------
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
-#include "data.h"
-#include "proxmark3.h"
-#include "ui.h"
-#include "cmdparser.h"
#include "cmdhficlass.h"
-#include "common.h"
-#include "util.h"
-#include "cmdmain.h"
-#include "loclass/des.h"
-#include "loclass/cipherutils.h"
-#include "loclass/cipher.h"
-#include "loclass/ikeys.h"
-#include "loclass/elite_crack.h"
-#include "loclass/fileutils.h"
-#include "protocols.h"
-#include "usb_cmd.h"
-#include "cmdhfmfu.h"
-#include "cmdhf.h"
static int CmdHelp(const char *Cmd);
+#define NUM_CSNS 15
#define ICLASS_KEYS_MAX 8
static uint8_t iClass_Key_Table[ICLASS_KEYS_MAX][8] = {
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
uint8_t d[8];
} iclass_block_t;
+int usage_hf_iclass_sim(void) {
+ PrintAndLog("Usage: hf iclass sim <option> [CSN]");
+ PrintAndLog(" options");
+ PrintAndLog(" 0 <CSN> simulate the given CSN");
+ PrintAndLog(" 1 simulate default CSN");
+ PrintAndLog(" 2 Reader-attack, gather reader responses to extract elite key");
+ PrintAndLog(" 3 Full simulation using emulator memory (see 'hf iclass eload')");
+ PrintAndLog(" example: hf iclass sim 0 031FEC8AF7FF12E0");
+ PrintAndLog(" example: hf iclass sim 2");
+ PrintAndLog(" example: hf iclass eload 'tagdump.bin'");
+ PrintAndLog(" hf iclass sim 3");
+ return 0;
+}
+int usage_hf_iclass_eload(void) {
+ PrintAndLog("Loads iclass tag-dump into emulator memory on device");
+ PrintAndLog("Usage: hf iclass eload f <filename>");
+ PrintAndLog("");
+ PrintAndLog("Example: hf iclass eload f iclass_tagdump-aa162d30f8ff12f1.bin");
+ return 0;
+}
+int usage_hf_iclass_decrypt(void) {
+ PrintAndLog("Usage: hf iclass decrypt f <tagdump>");
+ PrintAndLog("");
+ PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
+ PrintAndLog("in the working directory. The file should be 16 bytes binary data");
+ PrintAndLog("");
+ PrintAndLog("example: hf iclass decrypt f tagdump_12312342343.bin");
+ PrintAndLog("");
+ PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
+ PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
+ PrintAndLog("which is defined by the configuration block.");
+ return 1;
+}
+int usage_hf_iclass_encrypt(void) {
+ PrintAndLog("Usage: hf iclass encrypt <BlockData>");
+ PrintAndLog("");
+ PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
+ PrintAndLog("in the working directory. The file should be 16 bytes binary data");
+ PrintAndLog("");
+ PrintAndLog("example: hf iclass encrypt 0102030405060708");
+ PrintAndLog("");
+ return 0;
+}
+int usage_hf_iclass_dump(void) {
+ PrintAndLog("Usage: hf iclass dump f <fileName> k <Key> c <CreditKey> e|r\n");
+ PrintAndLog("Options:");
+ PrintAndLog(" f <filename> : specify a filename to save dump to");
+ PrintAndLog(" k <Key> : *Access Key as 16 hex symbols or 1 hex to select key from memory");
+ PrintAndLog(" c <CreditKey>: Credit Key as 16 hex symbols or 1 hex to select key from memory");
+ PrintAndLog(" e : If 'e' is specified, the key is interpreted as the 16 byte");
+ PrintAndLog(" Custom Key (KCus), which can be obtained via reader-attack");
+ PrintAndLog(" See 'hf iclass sim 2'. This key should be on iclass-format");
+ PrintAndLog(" r : If 'r' is specified, the key is interpreted as raw block 3/4");
+ PrintAndLog(" NOTE: * = required");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass dump k 001122334455667B");
+ PrintAndLog(" hf iclass dump k AAAAAAAAAAAAAAAA c 001122334455667B");
+ PrintAndLog(" hf iclass dump k AAAAAAAAAAAAAAAA e");
+ return 0;
+}
+int usage_hf_iclass_clone(void) {
+ PrintAndLog("Usage: hf iclass clone f <tagfile.bin> b <first block> l <last block> k <KEY> c e|r");
+ PrintAndLog("Options:");
+ PrintAndLog(" f <filename>: specify a filename to clone from");
+ PrintAndLog(" b <Block> : The first block to clone as 2 hex symbols");
+ PrintAndLog(" l <Last Blk>: Set the Data to write as 16 hex symbols");
+ PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
+ PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
+ PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
+ PrintAndLog(" r : If 'r' is specified, no computations applied to key");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 06 l 1A k 1122334455667788 e");
+ PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 05 l 19 k 0");
+ PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 06 l 19 k 0 e");
+ return -1;
+}
+int usage_hf_iclass_writeblock(void) {
+ PrintAndLog("Options:");
+ PrintAndLog(" b <Block> : The block number as 2 hex symbols");
+ PrintAndLog(" d <data> : Set the Data to write as 16 hex symbols");
+ PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
+ PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
+ PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
+ PrintAndLog(" r : If 'r' is specified, no computations applied to key");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA k 001122334455667B");
+ PrintAndLog(" hf iclass writeblk b 1B d AAAAAAAAAAAAAAAA k 001122334455667B c");
+ PrintAndLog(" hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA n 0");
+ return 0;
+}
+int usage_hf_iclass_readblock(void) {
+ PrintAndLog("Usage: hf iclass readblk b <Block> k <Key> c e|r\n");
+ PrintAndLog("Options:");
+ PrintAndLog(" b <Block> : The block number as 2 hex symbols");
+ PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
+ PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
+ PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
+ PrintAndLog(" r : If 'r' is specified, no computations applied to key");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass readblk b 06 k 0011223344556677");
+ PrintAndLog(" hf iclass readblk b 1B k 0011223344556677 c");
+ PrintAndLog(" hf iclass readblk b 0A k 0");
+ return 0;
+}
+int usage_hf_iclass_readtagfile() {
+ PrintAndLog("Usage: hf iclass readtagfile <filename> [startblock] [endblock]");
+ return 1;
+}
+int usage_hf_iclass_calc_newkey(void) {
+ PrintAndLog("HELP : Manage iClass Keys in client memory:\n");
+ PrintAndLog("Usage: hf iclass calc_newkey o <Old key> n <New key> s [csn] e");
+ PrintAndLog(" Options:");
+ PrintAndLog(" o <oldkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
+ PrintAndLog(" n <newkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
+ PrintAndLog(" s <csn> : specify a card Serial number to diversify the key (if omitted will attempt to read a csn)");
+ PrintAndLog(" e : specify new key as elite calc");
+ PrintAndLog(" ee : specify old and new key as elite calc");
+ PrintAndLog("Samples:");
+ PrintAndLog(" e key to e key given csn : hf iclass calcnewkey o 1122334455667788 n 2233445566778899 s deadbeafdeadbeaf ee");
+ PrintAndLog(" std key to e key read csn: hf iclass calcnewkey o 1122334455667788 n 2233445566778899 e");
+ PrintAndLog(" std to std read csn : hf iclass calcnewkey o 1122334455667788 n 2233445566778899");
+ PrintAndLog("NOTE: * = required\n");
+ return 1;
+}
+int usage_hf_iclass_managekeys(void) {
+ PrintAndLog("HELP : Manage iClass Keys in client memory:\n");
+ PrintAndLog("Usage: hf iclass managekeys n [keynbr] k [key] f [filename] s l p\n");
+ PrintAndLog(" Options:");
+ PrintAndLog(" n <keynbr> : specify the keyNbr to set in memory");
+ PrintAndLog(" k <key> : set a key in memory");
+ PrintAndLog(" f <filename>: specify a filename to use with load or save operations");
+ PrintAndLog(" s : save keys in memory to file specified by filename");
+ PrintAndLog(" l : load keys to memory from file specified by filename");
+ PrintAndLog(" p : print keys loaded into memory\n");
+ PrintAndLog("Samples:");
+ PrintAndLog(" set key : hf iclass managekeys n 0 k 1122334455667788");
+ PrintAndLog(" save key file: hf iclass managekeys f mykeys.bin s");
+ PrintAndLog(" load key file: hf iclass managekeys f mykeys.bin l");
+ PrintAndLog(" print keys : hf iclass managekeys p\n");
+ return 0;
+}
+int usage_hf_iclass_reader(void) {
+ PrintAndLog("HELP : Act as a Iclass reader:\n");
+ PrintAndLog("Usage: hf iclass reader [h] [1]\n");
+ PrintAndLog("Options:");
+ PrintAndLog(" h This help text");
+ PrintAndLog(" 1 read only 1 tag");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass reader 1");
+ return 0;
+}
+int usage_hf_iclass_replay(void){
+ PrintAndLog("HELP: Replay a collected mac message");
+ PrintAndLog("Usage: hf iclass replay [h] <mac>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h This help text");
+ PrintAndLog(" <mac> Mac bytes to replay (8 hexsymbols)");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass replay 00112233");
+ return 0;
+}
+int usage_hf_iclass_snoop(void){
+ PrintAndLog("HELP: Snoops the communication between reader and tag");
+ PrintAndLog("Usage: hf iclass snoop [h]");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf iclass snoop");
+ return 0;
+}
int xorbits_8(uint8_t val) {
uint8_t res = val ^ (val >> 1); //1st pass
res = res ^ (res >> 1); // 2nd pass
}
int CmdHFiClassSnoop(const char *Cmd) {
+ char cmdp = param_getchar(Cmd, 0);
+ if (cmdp == 'h' || cmdp == 'H') return usage_hf_iclass_snoop();
+
UsbCommand c = {CMD_SNOOP_ICLASS};
SendCommand(&c);
return 0;
}
-int usage_hf_iclass_sim(void) {
- PrintAndLog("Usage: hf iclass sim <option> [CSN]");
- PrintAndLog(" options");
- PrintAndLog(" 0 <CSN> simulate the given CSN");
- PrintAndLog(" 1 simulate default CSN");
- PrintAndLog(" 2 Reader-attack, gather reader responses to extract elite key");
- PrintAndLog(" 3 Full simulation using emulator memory (see 'hf iclass eload')");
- PrintAndLog(" example: hf iclass sim 0 031FEC8AF7FF12E0");
- PrintAndLog(" example: hf iclass sim 2");
- PrintAndLog(" example: hf iclass eload 'tagdump.bin'");
- PrintAndLog(" hf iclass sim 3");
- return 0;
-}
-
-#define NUM_CSNS 15
int CmdHFiClassSim(const char *Cmd) {
uint8_t simType = 0;
uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
- if (strlen(Cmd)<1) {
- return usage_hf_iclass_sim();
- }
+ if (strlen(Cmd)<1) return usage_hf_iclass_sim();
+
simType = param_get8ex(Cmd, 0, 0, 10);
if(simType == 0)
PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
}
+
if(simType > 3)
{
PrintAndLog("Undefined simptype %d", simType);
0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
memcpy(c.d.asBytes, csns, 8*NUM_CSNS);
-
+ clearCommandBuffer();
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
PrintAndLog("Command timed out");
void* dump = malloc(datalen);
memset(dump,0,datalen);//<-- Need zeroes for the CC-field
uint8_t i = 0;
- for(i = 0 ; i < NUM_CSNS ; i++)
- {
- memcpy(dump+i*24, csns+i*8,8); //CSN
+ for(i = 0 ; i < NUM_CSNS ; i++) {
+ memcpy(dump+i*24, csns+i*8, 8); //CSN
//8 zero bytes here...
//Then comes NR_MAC (eight bytes from the response)
- memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
-
+ memcpy(dump+i*24+16, resp.d.asBytes+i*8, 8);
}
/** Now, save to dumpfile **/
- saveFile("iclass_mac_attack", "bin", dump,datalen);
+ saveFile("iclass_mac_attack", "bin", dump, datalen);
free(dump);
- }else
- {
+ } else {
UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
memcpy(c.d.asBytes, CSN, 8);
+ clearCommandBuffer();
SendCommand(&c);
}
-
return 0;
}
int HFiClassReader(const char *Cmd, bool loop, bool verbose) {
bool tagFound = false;
- UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN|
- FLAG_ICLASS_READER_CONF|FLAG_ICLASS_READER_AA}};
+ UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN |
+ FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_AA}};
// loop in client not device - else on windows have a communication error
c.arg[0] |= FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY;
UsbCommand resp;
while(!ukbhit()){
+ clearCommandBuffer();
SendCommand(&c);
if (WaitForResponseTimeout(CMD_ACK,&resp, 4500)) {
- uint8_t readStatus = resp.arg[0] & 0xff;
+ uint8_t readStatus = resp.arg[0] & 0xff;
uint8_t *data = resp.d.asBytes;
- if (verbose)
- PrintAndLog("Readstatus:%02x", readStatus);
+ if (verbose) PrintAndLog("Readstatus:%02x", readStatus);
if( readStatus == 0){
//Aborted
if (verbose) PrintAndLog("Quitting...");
PrintAndLog("CSN: %s",sprint_hex(data,8));
tagFound = true;
}
- if( readStatus & FLAG_ICLASS_READER_CC) PrintAndLog("CC: %s",sprint_hex(data+16,8));
- if( readStatus & FLAG_ICLASS_READER_CONF){
- printIclassDumpInfo(data);
- }
+ if( readStatus & FLAG_ICLASS_READER_CC) PrintAndLog("CC: %s", sprint_hex(data+16, 8));
+ if( readStatus & FLAG_ICLASS_READER_CONF) printIclassDumpInfo(data);
if (tagFound && !loop) return 1;
} else {
if (verbose) PrintAndLog("Command execute timeout");
return 0;
}
-int CmdHFiClassReader(const char *Cmd) {
- return HFiClassReader(Cmd, true, true);
+int CmdHFiClassReader(const char *Cmd) {
+ char cmdp = param_getchar(Cmd, 0);
+ if (cmdp == 'h' || cmdp == 'H') return usage_hf_iclass_reader();
+ bool findone = (cmdp == '1') ? FALSE : TRUE;
+ return HFiClassReader(Cmd, findone, true);
}
int CmdHFiClassReader_Replay(const char *Cmd) {
uint8_t readerType = 0;
uint8_t MAC[4]={0x00, 0x00, 0x00, 0x00};
- if (strlen(Cmd)<1) {
- PrintAndLog("Usage: hf iclass replay <MAC>");
- PrintAndLog(" sample: hf iclass replay 00112233");
- return 0;
- }
+ if (strlen(Cmd)<1) return usage_hf_iclass_replay();
if (param_gethex(Cmd, 0, MAC, 8)) {
PrintAndLog("MAC must include 8 HEX symbols");
UsbCommand c = {CMD_READER_ICLASS_REPLAY, {readerType}};
memcpy(c.d.asBytes, MAC, 4);
+ clearCommandBuffer();
SendCommand(&c);
-
return 0;
}
int iclassEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
memcpy(c.d.asBytes, data, blocksCount * 16);
+ clearCommandBuffer();
SendCommand(&c);
return 0;
}
-int hf_iclass_eload_usage(void) {
- PrintAndLog("Loads iclass tag-dump into emulator memory on device");
- PrintAndLog("Usage: hf iclass eload f <filename>");
- PrintAndLog("");
- PrintAndLog("Example: hf iclass eload f iclass_tagdump-aa162d30f8ff12f1.bin");
- return 0;
-}
-
int CmdHFiClassELoad(const char *Cmd) {
char opt = param_getchar(Cmd, 0);
- if (strlen(Cmd)<1 || opt == 'h')
- return hf_iclass_eload_usage();
+ if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_eload();
//File handling and reading
FILE *f;
if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0) {
f = fopen(filename, "rb");
} else {
- return hf_iclass_eload_usage();
+ return usage_hf_iclass_eload();
}
if(!f) {
printIclassDumpInfo(dump);
//Validate
- if (bytes_read < fsize)
- {
+ if (bytes_read < fsize) {
prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
free(dump);
return 1;
uint32_t bytes_in_packet = MIN(USB_CMD_DATA_SIZE, bytes_remaining);
UsbCommand c = {CMD_ICLASS_EML_MEMSET, {bytes_sent,bytes_in_packet,0}};
memcpy(c.d.asBytes, dump, bytes_in_packet);
+ clearCommandBuffer();
SendCommand(&c);
bytes_remaining -= bytes_in_packet;
bytes_sent += bytes_in_packet;
fseek(f, 0, SEEK_SET);
size_t bytes_read = fread(buffer, 1, len, f);
fclose(f);
- if(fsize != len)
- {
+
+ if(fsize != len) {
PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
return 1;
}
- if(bytes_read != len)
- {
+
+ if(bytes_read != len) {
PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
return 1;
}
return 0;
}
-int usage_hf_iclass_decrypt(void) {
- PrintAndLog("Usage: hf iclass decrypt f <tagdump>");
- PrintAndLog("");
- PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
- PrintAndLog("in the working directory. The file should be 16 bytes binary data");
- PrintAndLog("");
- PrintAndLog("example: hf iclass decrypt f tagdump_12312342343.bin");
- PrintAndLog("");
- PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
- PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
- PrintAndLog("which is defined by the configuration block.");
- return 1;
-}
-
int CmdHFiClassDecrypt(const char *Cmd) {
- uint8_t key[16] = { 0 };
- if(readKeyfile("iclass_decryptionkey.bin", 16, key))
- {
- usage_hf_iclass_decrypt();
- return 1;
- }
- PrintAndLog("Decryption file found... ");
+
char opt = param_getchar(Cmd, 0);
- if (strlen(Cmd)<1 || opt == 'h')
- return usage_hf_iclass_decrypt();
+ if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_decrypt();
+
+ uint8_t key[16] = { 0 };
+ if(readKeyfile("iclass_decryptionkey.bin", 16, key)) return usage_hf_iclass_decrypt();
+
+ PrintAndLog("Decryption key loaded from file [ok]");
//Open the tagdump-file
FILE *f;
char filename[FILE_PATH_SIZE];
if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0) {
- if ( (f = fopen(filename, "rb")) == NULL) {
+ f = fopen(filename, "rb");
+ if (!f) {
PrintAndLog("Could not find file %s", filename);
return 1;
- }
-
+ }
} else {
return usage_hf_iclass_decrypt();
}
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
- uint8_t enc_dump[8] = {0};
+
+ if ( fsize < 0 ) {
+ PrintAndLog("Error, when getting filesize");
+ fclose(f);
+ return 2;
+ }
+
uint8_t *decrypted = malloc(fsize);
- des3_context ctx = { DES_DECRYPT ,{ 0 } };
- des3_set2key_dec( &ctx, key);
- size_t bytes_read = fread(enc_dump, 1, 8, f);
+
+ size_t bytes_read = fread(decrypted, 1, fsize, f);
+ fclose(f);
+ if ( bytes_read == 0) {
+ PrintAndLog("File reading error");
+ free(decrypted);
+ return 3;
+ }
+ picopass_hdr *hdr = (picopass_hdr *)decrypted;
+
+ uint8_t mem = hdr->conf.mem_config;
+ uint8_t chip = hdr->conf.chip_config;
+ uint8_t applimit = hdr->conf.app_limit;
+ uint8_t kb = 2;
+ uint8_t app_areas = 2;
+ uint8_t max_blk = 31;
+ getMemConfig(mem, chip, &max_blk, &app_areas, &kb);
+
//Use the first block (CSN) for filename
- char outfilename[FILE_PATH_SIZE] = { 0 };
- snprintf(outfilename,FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
- enc_dump[0],enc_dump[1],enc_dump[2],enc_dump[3],
- enc_dump[4],enc_dump[5],enc_dump[6],enc_dump[7]);
+ char outfilename[FILE_PATH_SIZE] = {0};
+ snprintf(outfilename, FILE_PATH_SIZE, "iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
+ hdr->csn[0],hdr->csn[1],hdr->csn[2],hdr->csn[3],
+ hdr->csn[4],hdr->csn[5],hdr->csn[6],hdr->csn[7]);
- size_t blocknum =0;
- while(bytes_read == 8)
- {
- if(blocknum < 7)
- {
- memcpy(decrypted+(blocknum*8), enc_dump, 8);
- }else{
- des3_crypt_ecb(&ctx, enc_dump,decrypted +(blocknum*8) );
+ // tripledes
+ des3_context ctx = { DES_DECRYPT ,{ 0 } };
+ des3_set2key_dec( &ctx, key);
+
+ uint8_t enc_dump[8] = {0};
+ uint8_t empty[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
+ for(uint16_t blocknum=0; blocknum < applimit; ++blocknum) {
+
+ uint8_t idx = blocknum*8;
+ memcpy(enc_dump, decrypted + idx, 8);
+
+ // block 7 or higher, and not empty 0xFF
+ if(blocknum > 6 && memcmp(enc_dump, empty, 8) != 0 ) {
+ des3_crypt_ecb(&ctx, enc_dump, decrypted + idx );
}
- printvar("decrypted block", decrypted +(blocknum*8), 8);
- bytes_read = fread(enc_dump, 1, 8, f);
- blocknum++;
+ //printvar("decrypted block", decrypted + idx, 8);
}
- fclose(f);
-
- saveFile(outfilename,"bin", decrypted, blocknum*8);
-
+
+ saveFile(outfilename, "bin", decrypted, fsize);
free(decrypted);
- return 0;
-}
-
-int usage_hf_iclass_encrypt(void) {
- PrintAndLog("Usage: hf iclass encrypt <BlockData>");
- PrintAndLog("");
- PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
- PrintAndLog("in the working directory. The file should be 16 bytes binary data");
- PrintAndLog("");
- PrintAndLog("example: hf iclass encrypt 0102030405060708");
- PrintAndLog("");
+
+ printIclassDumpContents(decrypted, 1, (fsize/8), fsize);
return 0;
}
static int iClassEncryptBlkData(uint8_t *blkData) {
uint8_t key[16] = { 0 };
- if(readKeyfile("iclass_decryptionkey.bin", 16, key))
- {
+ if(readKeyfile("iclass_decryptionkey.bin", 16, key)) {
usage_hf_iclass_encrypt();
return 1;
}
PrintAndLog("Decryption file found... ");
-
uint8_t encryptedData[16];
uint8_t *encrypted = encryptedData;
des3_context ctx = { DES_DECRYPT ,{ 0 } };
int CmdHFiClassEncryptBlk(const char *Cmd) {
uint8_t blkData[8] = {0};
char opt = param_getchar(Cmd, 0);
- if (strlen(Cmd)<1 || opt == 'h')
- return usage_hf_iclass_encrypt();
+ if (strlen(Cmd)<1 || opt == 'h' || opt == 'H') return usage_hf_iclass_encrypt();
//get the bytes to encrypt
- if (param_gethex(Cmd, 0, blkData, 16))
- {
+ if (param_gethex(Cmd, 0, blkData, 16)) {
PrintAndLog("BlockData must include 16 HEX symbols");
return 0;
}
clearCommandBuffer();
SendCommand(&c);
- if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
- {
+ if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
PrintAndLog("Command execute timeout");
return false;
}
uint8_t *data = resp.d.asBytes;
memcpy(CSN,data,8);
- if (CCNR!=NULL)memcpy(CCNR,data+16,8);
- if(isOK > 0)
- {
+
+ if (CCNR!=NULL)
+ memcpy(CCNR,data+16,8);
+
+ if(isOK > 0) {
if (verbose) PrintAndLog("CSN: %s",sprint_hex(CSN,8));
}
+
if(isOK <= 1){
PrintAndLog("Failed to obtain CC! Aborting");
return false;
if(rawkey)
memcpy(div_key, KEY, 8);
else
- HFiClassCalcDivKey(CSN, KEY, div_key, elite);
+ HFiClassCalcDivKey(CSN, KEY, div_key, elite);
+
PrintAndLog("Authing with %s: %02x%02x%02x%02x%02x%02x%02x%02x", rawkey ? "raw key" : "diversified key", div_key[0],div_key[1],div_key[2],div_key[3],div_key[4],div_key[5],div_key[6],div_key[7]);
doMAC(CCNR, div_key, MAC);
memcpy(d.d.asBytes, MAC, 4);
clearCommandBuffer();
SendCommand(&d);
- if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
- {
+ if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
PrintAndLog("Auth Command execute timeout");
return false;
}
- uint8_t isOK = resp.arg[0] & 0xff;
+ uint8_t isOK = resp.arg[0] & 0xff;
if (!isOK) {
PrintAndLog("Authentication error");
return false;
return true;
}
-int usage_hf_iclass_dump(void) {
- PrintAndLog("Usage: hf iclass dump f <fileName> k <Key> c <CreditKey> e|r\n");
- PrintAndLog("Options:");
- PrintAndLog(" f <filename> : specify a filename to save dump to");
- PrintAndLog(" k <Key> : *Access Key as 16 hex symbols or 1 hex to select key from memory");
- PrintAndLog(" c <CreditKey>: Credit Key as 16 hex symbols or 1 hex to select key from memory");
- PrintAndLog(" e : If 'e' is specified, the key is interpreted as the 16 byte");
- PrintAndLog(" Custom Key (KCus), which can be obtained via reader-attack");
- PrintAndLog(" See 'hf iclass sim 2'. This key should be on iclass-format");
- PrintAndLog(" r : If 'r' is specified, the key is interpreted as raw block 3/4");
- PrintAndLog(" NOTE: * = required");
- PrintAndLog("Samples:");
- PrintAndLog(" hf iclass dump k 001122334455667B");
- PrintAndLog(" hf iclass dump k AAAAAAAAAAAAAAAA c 001122334455667B");
- PrintAndLog(" hf iclass dump k AAAAAAAAAAAAAAAA e");
- return 0;
-}
-
int CmdHFiClassReader_Dump(const char *Cmd) {
uint8_t MAC[4] = {0x00,0x00,0x00,0x00};
return 0;
}
uint8_t readStatus = resp.arg[0] & 0xff;
- uint8_t * data = resp.d.asBytes;
+ uint8_t * data = resp.d.asBytes;
if(readStatus == 0){
PrintAndLog("No tag found...");
ul_switch_off_field();
- return 0;
-}
- if( readStatus & (FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CONF|FLAG_ICLASS_READER_CC)){
+ return 0;
+ }
+
+ if( readStatus & (FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_CC)){
memcpy(tag_data, data, 8*3);
- blockno+=2; // 2 to force re-read of block 2 later. (seems to respond differently..)
+ blockno += 2; // 2 to force re-read of block 2 later. (seems to respond differently..)
numblks = data[8];
getMemConfig(data[13], data[12], &maxBlk, &app_areas, &kb);
// large memory - not able to dump pages currently
if (numblks > maxBlk) numblks = maxBlk;
}
+
ul_switch_off_field();
// authenticate debit key and get div_key - later store in dump block 3
if (!select_and_auth(KEY, MAC, div_key, use_credit_key, elite, rawkey, false)){
// add diversified keys to dump
if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
+
+ printf("Num of bytes: %zu\n", gotBytes);
+
// print the dump
- printf("CSN |00| %02X %02X %02X %02X %02X %02X %02X %02X |\n",tag_data[0],tag_data[1],tag_data[2]
- ,tag_data[3],tag_data[4],tag_data[5],tag_data[6],tag_data[7]);
- printIclassDumpContents(tag_data, 1, (gotBytes/8)-1, gotBytes-8);
+ printf("------+--+-------------------------+\n");
+ printf("CSN |00| %s|\n", sprint_hex(tag_data, 8));
+ //printIclassDumpContents(tag_data, 1, (gotBytes/8)-1, gotBytes-8);
+ printIclassDumpContents(tag_data, 1, (gotBytes/8), gotBytes);
if (filename[0] == 0){
snprintf(filename, FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
clearCommandBuffer();
SendCommand(&w);
- if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
- {
+ if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
PrintAndLog("Write Command execute timeout");
return 0;
}
return 1;
}
-int usage_hf_iclass_writeblock(void) {
- PrintAndLog("Options:");
- PrintAndLog(" b <Block> : The block number as 2 hex symbols");
- PrintAndLog(" d <data> : Set the Data to write as 16 hex symbols");
- PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
- PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
- PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
- PrintAndLog(" r : If 'r' is specified, no computations applied to key");
- PrintAndLog("Samples:");
- PrintAndLog(" hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA k 001122334455667B");
- PrintAndLog(" hf iclass writeblk b 1B d AAAAAAAAAAAAAAAA k 001122334455667B c");
- PrintAndLog(" hf iclass writeblk b 0A d AAAAAAAAAAAAAAAA n 0");
- return 0;
-}
-
int CmdHFiClass_WriteBlock(const char *Cmd) {
uint8_t blockno=0;
uint8_t bldata[8]={0,0,0,0,0,0,0,0};
return ans;
}
-int usage_hf_iclass_clone(void) {
- PrintAndLog("Usage: hf iclass clone f <tagfile.bin> b <first block> l <last block> k <KEY> c e|r");
- PrintAndLog("Options:");
- PrintAndLog(" f <filename>: specify a filename to clone from");
- PrintAndLog(" b <Block> : The first block to clone as 2 hex symbols");
- PrintAndLog(" l <Last Blk>: Set the Data to write as 16 hex symbols");
- PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
- PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
- PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
- PrintAndLog(" r : If 'r' is specified, no computations applied to key");
- PrintAndLog("Samples:");
- PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 06 l 1A k 1122334455667788 e");
- PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 05 l 19 k 0");
- PrintAndLog(" hf iclass clone f iclass_tagdump-121345.bin b 06 l 19 k 0 e");
- return -1;
-}
-
int CmdHFiClassCloneTag(const char *Cmd) {
char filename[FILE_PATH_SIZE] = { 0x00 };
char tempStr[50]={0};
// else we have to create a share memory
int i;
fseek(f,startblock*8,SEEK_SET);
- if ( fread(tag_data,sizeof(iclass_block_t),endblock - startblock + 1,f) == 0){
+ size_t bytes_read = fread(tag_data,sizeof(iclass_block_t),endblock - startblock + 1,f);
+ if ( bytes_read == 0){
PrintAndLog("File reading error.");
fclose(f);
return 2;
printf(" MAC |%02x%02x%02x%02x|\n",p[8],p[9],p[10],p[11]);
}
UsbCommand resp;
+ clearCommandBuffer();
SendCommand(&w);
- if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
- {
+ if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
PrintAndLog("Command execute timeout");
return 0;
}
UsbCommand w = {CMD_ICLASS_READBLOCK, {blockno}};
clearCommandBuffer();
SendCommand(&w);
- if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
- {
+ if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
PrintAndLog("Command execute timeout");
return 0;
}
+
uint8_t isOK = resp.arg[0] & 0xff;
if (!isOK) {
PrintAndLog("Read Block Failed");
return 1;
}
-int usage_hf_iclass_readblock(void) {
- PrintAndLog("Usage: hf iclass readblk b <Block> k <Key> c e|r\n");
- PrintAndLog("Options:");
- PrintAndLog(" b <Block> : The block number as 2 hex symbols");
- PrintAndLog(" k <Key> : Access Key as 16 hex symbols or 1 hex to select key from memory");
- PrintAndLog(" c : If 'c' is specified, the key set is assumed to be the credit key\n");
- PrintAndLog(" e : If 'e' is specified, elite computations applied to key");
- PrintAndLog(" r : If 'r' is specified, no computations applied to key");
- PrintAndLog("Samples:");
- PrintAndLog(" hf iclass readblk b 06 k 0011223344556677");
- PrintAndLog(" hf iclass readblk b 1B k 0011223344556677 c");
- PrintAndLog(" hf iclass readblk b 0A k 0");
- return 0;
-}
-
int CmdHFiClass_ReadBlock(const char *Cmd) {
uint8_t blockno=0;
uint8_t keyType = 0x88; //debit key
PrintAndLog("f <filename> Bruteforce iclass dumpfile");
PrintAndLog(" An iclass dumpfile is assumed to consist of an arbitrary number of");
PrintAndLog(" malicious CSNs, and their protocol responses");
- PrintAndLog(" The the binary format of the file is expected to be as follows: ");
+ PrintAndLog(" The binary format of the file is expected to be as follows: ");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
PrintAndLog(" <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
return 0;
}
char fileName[255] = {0};
- if(opt == 'f')
- {
- if(param_getstr(Cmd, 1, fileName) > 0)
- {
+ if(opt == 'f') {
+ if(param_getstr(Cmd, 1, fileName) > 0) {
return bruteforceFileNoKeys(fileName);
- }else
- {
+ } else {
PrintAndLog("You must specify a filename");
+ // no return?
}
}
- else if(opt == 't')
- {
+ else if(opt == 't') {
int errors = testCipherUtils();
errors += testMAC();
errors += doKeyTests(0);
errors += testElite();
- if(errors)
- {
- prnlog("OBS! There were errors!!!");
- }
+ if(errors) prnlog("OBS! There were errors!!!");
return errors;
}
-
return 0;
}
void printIclassDumpContents(uint8_t *iclass_dump, uint8_t startblock, uint8_t endblock, size_t filesize) {
- uint8_t blockdata[8];
uint8_t mem_config;
memcpy(&mem_config, iclass_dump + 13,1);
uint8_t maxmemcount;
+
uint8_t filemaxblock = filesize / 8;
+
if (mem_config & 0x80)
maxmemcount = 255;
else
maxmemcount = 31;
- //PrintAndLog ("endblock: %d, filesize: %d, maxmemcount: %d, filemaxblock: %d", endblock,filesize, maxmemcount, filemaxblock);
if (startblock == 0)
startblock = 6;
+
if ((endblock > maxmemcount) || (endblock == 0))
endblock = maxmemcount;
- if (endblock > filemaxblock)
- endblock = filemaxblock;
+
+ // remember endblock needs to relate to zero-index arrays.
+ if (endblock > filemaxblock-1)
+ endblock = filemaxblock-1;
+
+ //PrintAndLog ("startblock: %d, endblock: %d, filesize: %d, maxmemcount: %d, filemaxblock: %d",startblock, endblock,filesize, maxmemcount, filemaxblock);
+
int i = startblock;
- int j;
+ printf("------+--+-------------------------+\n");
while (i <= endblock){
- printf("Block |%02X| ",i);
- memcpy(blockdata,iclass_dump + (i * 8),8);
- for (j = 0;j < 8;j++)
- printf("%02X ",blockdata[j]);
- printf("|\n");
+ uint8_t *blk = iclass_dump + (i * 8);
+ printf("Block |%02X| %s\n", i, sprint_hex_ascii(blk, 8) );
i++;
}
-}
-
-int usage_hf_iclass_readtagfile() {
- PrintAndLog("Usage: hf iclass readtagfile <filename> [startblock] [endblock]");
- return 1;
+ printf("------+--+-------------------------+\n");
}
int CmdHFiClassReadTagFile(const char *Cmd) {
char filename[FILE_PATH_SIZE];
if (param_getstr(Cmd, 0, filename) < 1)
return usage_hf_iclass_readtagfile();
+
if (param_getstr(Cmd,1,(char *)&tempnum) < 1)
startblock = 0;
else
endblock = 0;
else
sscanf(tempnum,"%d",&endblock);
+
// file handling and reading
f = fopen(filename,"rb");
if(!f) {
}
uint8_t *dump = malloc(fsize);
-
size_t bytes_read = fread(dump, 1, fsize, f);
fclose(f);
+
uint8_t *csn = dump;
- printf("CSN [00] | %02X %02X %02X %02X %02X %02X %02X %02X |\n",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
- // printIclassDumpInfo(dump);
- printIclassDumpContents(dump,startblock,endblock,bytes_read);
+ printf("------+--+-------------------------+\n");
+ printf("CSN |00| %s|\n", sprint_hex(csn, 8) );
+ printIclassDumpContents(dump, startblock, endblock, bytes_read);
free(dump);
return 0;
}
-/*
-uint64_t xorcheck(uint64_t sdiv,uint64_t hdiv) {
- uint64_t new_div = 0x00;
- new_div ^= sdiv;
- new_div ^= hdiv;
- return new_div;
-}
-
-uint64_t hexarray_to_uint64(uint8_t *key) {
- char temp[17];
- uint64_t uint_key;
- for (int i = 0;i < 8;i++)
- sprintf(&temp[(i *2)],"%02X",key[i]);
- temp[16] = '\0';
- if (sscanf(temp,"%016"llX,&uint_key) < 1)
- return 0;
- return uint_key;
-}
-*/
void HFiClassCalcDivKey(uint8_t *CSN, uint8_t *KEY, uint8_t *div_key, bool elite){
uint8_t keytable[128] = {0};
uint8_t key_index[8] = {0};
xor_div_key[i] = old_div_key[i] ^ new_div_key[i];
}
if (verbose) {
- printf("Old Div Key : %s\n",sprint_hex(old_div_key,8));
- printf("New Div Key : %s\n",sprint_hex(new_div_key,8));
- printf("Xor Div Key : %s\n",sprint_hex(xor_div_key,8));
+ printf("Old div key : %s\n",sprint_hex(old_div_key,8));
+ printf("New div key : %s\n",sprint_hex(new_div_key,8));
+ printf("Xor div key : %s\n",sprint_hex(xor_div_key,8));
}
}
-int usage_hf_iclass_calc_newkey(void) {
- PrintAndLog("HELP : Manage iClass Keys in client memory:\n");
- PrintAndLog("Usage: hf iclass calc_newkey o <Old key> n <New key> s [csn] e");
- PrintAndLog(" Options:");
- PrintAndLog(" o <oldkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
- PrintAndLog(" n <newkey> : *specify a key as 16 hex symbols or a key number as 1 symbol");
- PrintAndLog(" s <csn> : specify a card Serial number to diversify the key (if omitted will attempt to read a csn)");
- PrintAndLog(" e : specify new key as elite calc");
- PrintAndLog(" ee : specify old and new key as elite calc");
- PrintAndLog("Samples:");
- PrintAndLog(" e key to e key given csn : hf iclass calcnewkey o 1122334455667788 n 2233445566778899 s deadbeafdeadbeaf ee");
- PrintAndLog(" std key to e key read csn: hf iclass calcnewkey o 1122334455667788 n 2233445566778899 e");
- PrintAndLog(" std to std read csn : hf iclass calcnewkey o 1122334455667788 n 2233445566778899");
- PrintAndLog("NOTE: * = required\n");
-
- return 1;
-}
-
int CmdHFiClassCalcNewKey(const char *Cmd) {
uint8_t OLDKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uint8_t NEWKEY[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
return 0;
}
uint8_t i = 0;
- for (; i < bytes_read/8; i++){
+ for (; i < bytes_read/8; i++)
memcpy(iClass_Key_Table[i],dump+(i*8),8);
- }
+
free(dump);
PrintAndLog("%u keys loaded", i);
return 1;
static int saveKeys(char *filename) {
FILE *f;
f = fopen(filename,"wb");
- if (f == NULL) {
+ if (!f) {
printf("error opening file %s\n",filename);
return 0;
}
static int printKeys(void) {
PrintAndLog("");
- for (uint8_t i = 0; i < ICLASS_KEYS_MAX; i++){
- PrintAndLog("%u: %s",i,sprint_hex(iClass_Key_Table[i],8));
- }
+ for (uint8_t i = 0; i < ICLASS_KEYS_MAX; i++)
+ PrintAndLog("%u: %s", i, sprint_hex(iClass_Key_Table[i],8));
PrintAndLog("");
return 0;
}
-int usage_hf_iclass_managekeys(void) {
- PrintAndLog("HELP : Manage iClass Keys in client memory:\n");
- PrintAndLog("Usage: hf iclass managekeys n [keynbr] k [key] f [filename] s l p\n");
- PrintAndLog(" Options:");
- PrintAndLog(" n <keynbr> : specify the keyNbr to set in memory");
- PrintAndLog(" k <key> : set a key in memory");
- PrintAndLog(" f <filename>: specify a filename to use with load or save operations");
- PrintAndLog(" s : save keys in memory to file specified by filename");
- PrintAndLog(" l : load keys to memory from file specified by filename");
- PrintAndLog(" p : print keys loaded into memory\n");
- PrintAndLog("Samples:");
- PrintAndLog(" set key : hf iclass managekeys n 0 k 1122334455667788");
- PrintAndLog(" save key file: hf iclass managekeys f mykeys.bin s");
- PrintAndLog(" load key file: hf iclass managekeys f mykeys.bin l");
- PrintAndLog(" print keys : hf iclass managekeys p\n");
- return 0;
-}
-
int CmdHFiClassManageKeys(const char *Cmd) {
uint8_t keyNbr = 0;
uint8_t dataLen = 0;
return 0;
}
-static command_t CommandTable[] =
-{
- {"help", CmdHelp, 1, "This help"},
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
{"calcnewkey", CmdHFiClassCalcNewKey, 1, "[options..] Calc Diversified keys (blocks 3 & 4) to write new keys"},
{"clone", CmdHFiClassCloneTag, 0, "[options..] Authenticate and Clone from iClass bin file"},
{"decrypt", CmdHFiClassDecrypt, 1, "[f <fname>] Decrypt tagdump" },
{"loclass", CmdHFiClass_loclass, 1, "[options..] Use loclass to perform bruteforce of reader attack dump"},
{"managekeys", CmdHFiClassManageKeys, 1, "[options..] Manage the keys to use with iClass"},
{"readblk", CmdHFiClass_ReadBlock, 0, "[options..] Authenticate and Read iClass block"},
- {"reader",CmdHFiClassReader, 0, "Read an iClass tag"},
+ {"reader", CmdHFiClassReader, 0, "Read an iClass tag"},
{"readtagfile", CmdHFiClassReadTagFile, 1, "[options..] Display Content from tagfile"},
{"replay", CmdHFiClassReader_Replay, 0, "<mac> Read an iClass tag via Reply Attack"},
{"sim", CmdHFiClassSim, 0, "[options..] Simulate iClass tag"},
{NULL, NULL, 0, NULL}
};
-int CmdHFiClass(const char *Cmd)
-{
+int CmdHFiClass(const char *Cmd) {
+ clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
-int CmdHelp(const char *Cmd)
-{
+int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
projects / proxmark3-svn / blobdiff