#include "../common/protocols.h"
#include "data.h"
-#define MAX_UL_BLOCKS 0x0f
-#define MAX_ULC_BLOCKS 0x2b
-#define MAX_ULEV1a_BLOCKS 0x13
-#define MAX_ULEV1b_BLOCKS 0x28
-#define MAX_NTAG_203 0x29
-#define MAX_NTAG_210 0x13
-#define MAX_NTAG_212 0x28
-#define MAX_NTAG_213 0x2c
-#define MAX_NTAG_215 0x86
-#define MAX_NTAG_216 0xe6
+#define MAX_UL_BLOCKS 0x0f
+#define MAX_ULC_BLOCKS 0x2b
+#define MAX_ULEV1a_BLOCKS 0x13
+#define MAX_ULEV1b_BLOCKS 0x28
+#define MAX_NTAG_203 0x29
+#define MAX_NTAG_210 0x13
+#define MAX_NTAG_212 0x28
+#define MAX_NTAG_213 0x2c
+#define MAX_NTAG_215 0x86
+#define MAX_NTAG_216 0xe6
#define KEYS_3DES_COUNT 7
uint8_t default_3des_keys[KEYS_3DES_COUNT][16] = {
{ 0x49,0x45,0x4D,0x4B,0x41,0x45,0x52,0x42,0x21,0x4E,0x41,0x43,0x55,0x4F,0x59,0x46 },// NFC-key
{ 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 },// all ones
{ 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF },// all FF
- { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF },// 11 22 33
- };
+ { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF } // 11 22 33
+};
#define KEYS_PWD_COUNT 10
uint8_t default_pwd_pack[KEYS_PWD_COUNT][4] = {
{0xFF,0xFF,0xFF,0xFF}, // PACK 0x00,0x00 -- factory default
-
+
{0x4A,0xF8,0x4B,0x19}, // PACK 0xE5,0xBE -- italian bus (sniffed)
{0x33,0x6B,0xA1,0x19}, // PACK 0x9c,0x2d -- italian bus (sniffed)
{0xFF,0x90,0x6C,0xB2}, // PACK 0x12,0x9e -- italian bus (sniffed)
{0x46,0x1c,0xA3,0x19}, // PACK 0xE9,0x5A -- italian bus (sniffed)
{0x35,0x1C,0xD0,0x19}, // PACK 0x9A,0x5a -- italian bus (sniffed)
-
+
{0x05,0x22,0xE6,0xB4}, // PACK 0x80,0x80 -- Amiiboo (sniffed) pikachu-b UID:
{0x7E,0x22,0xE6,0xB4}, // PACK 0x80,0x80 -- AMiiboo (sniffed)
{0x02,0xE1,0xEE,0x36}, // PACK 0x80,0x80 -- AMiiboo (sniffed) sonic UID: 04d257 7ae33e8027
{0x32,0x0C,0x16,0x17}, // PACK 0x80,0x80 -- AMiiboo (sniffed)
-};
-
+};
+
#define MAX_UL_TYPES 16
uint16_t UL_TYPES_ARRAY[MAX_UL_TYPES] = {UNKNOWN, UL, UL_C, UL_EV1_48, UL_EV1_128, NTAG, NTAG_203,
NTAG_210, NTAG_212, NTAG_213, NTAG_215, NTAG_216, MY_D, MY_D_NFC, MY_D_MOVE, MY_D_MOVE_NFC};
static int CmdHelp(const char *Cmd);
-char* getProductTypeStr( uint8_t id){
+char *getProductTypeStr( uint8_t id){
- static char buf[20];
+ static char buf[20];
char *retStr = buf;
switch(id) {
the LSBit is set to '0' if the size is exactly 2^n
and set to '1' if the storage size is between 2^n and 2^(n+1).
*/
-char* getUlev1CardSizeStr( uint8_t fsize ){
-
- static char buf[40];
+char *getUlev1CardSizeStr( uint8_t fsize ){
+
+ static char buf[40];
char *retStr = buf;
- memset(buf, 0, sizeof(buf));
-
+ memset(buf, 0, sizeof(buf));
+
uint16_t usize = 1 << ((fsize >>1) + 1);
uint16_t lsize = 1 << (fsize >>1);
// is LSB set?
- if ( fsize & 1 )
- sprintf(retStr, "%02X, (%u <-> %u bytes)", fsize, usize, lsize);
+ if ( fsize & 1 )
+ sprintf(retStr, "%02X, (%u <-> %u bytes)",fsize, usize, lsize);
else
sprintf(retStr, "%02X, (%u bytes)", fsize, lsize);
return buf;
memcpy(c.d.asBytes, cmd, cmdlen);
SendCommand(&c);
UsbCommand resp;
- if ( !WaitForResponseTimeout(CMD_ACK, &resp, 1500) ) return -1;
- if ( !resp.arg[0] && responseLength) return -1;
-
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) return -1;
+ if (!resp.arg[0] && responseLength) return -1;
+
uint16_t resplen = (resp.arg[0] < responseLength) ? resp.arg[0] : responseLength;
memcpy(response, resp.d.asBytes, resplen);
return resplen;
UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_NO_DISCONNECT , cmdlen, 0}};
if (append_crc)
c.arg[0] |= ISO14A_APPEND_CRC;
-
+
memcpy(c.d.asBytes, cmd, cmdlen);
SendCommand(&c);
UsbCommand resp;
if (!resp.arg[0] && responseLength) return -1;
uint16_t resplen = (resp.arg[0] < responseLength) ? resp.arg[0] : responseLength;
- memcpy(response, resp.d.asBytes, resplen );
+ memcpy(response, resp.d.asBytes, resplen);
return resplen;
}
*/
static int ul_select( iso14a_card_select_t *card ){
-
+
ul_switch_on_field();
UsbCommand resp;
ul_switch_off_field();
return 0;
}
+
+ memcpy(card, resp.d.asBytes, sizeof(iso14a_card_select_t));
+ return 1;
+}
+
+// This read command will at least return 16bytes.
+static int ul_read( uint8_t page, uint8_t *response, uint16_t responseLength ){
+
+ uint8_t cmd[] = {ISO14443A_CMD_READBLOCK, page};
+ int len = ul_send_cmd_raw(cmd, sizeof(cmd), response, responseLength);
+ return len;
+}
+
+static int ul_comp_write( uint8_t page, uint8_t *data, uint8_t datalen ){
+
+ uint8_t cmd[18];
+ memset(cmd, 0x00, sizeof(cmd));
+ datalen = ( datalen > 16) ? 16 : datalen;
+
+ cmd[0] = ISO14443A_CMD_WRITEBLOCK;
+ cmd[1] = page;
+ memcpy(cmd+2, data, datalen);
+
+ uint8_t response[1] = {0xff};
+ ul_send_cmd_raw(cmd, 2+datalen, response, sizeof(response));
+ // ACK
+ if ( response[0] == 0x0a ) return 0;
+ // NACK
+ return -1;
+}
+
+static int ulc_requestAuthentication( uint8_t *nonce, uint16_t nonceLength ){
+
+ uint8_t cmd[] = {MIFARE_ULC_AUTH_1, 0x00};
+ int len = ul_send_cmd_raw(cmd, sizeof(cmd), nonce, nonceLength);
+ return len;
+}
+
+static int ulc_authentication( uint8_t *key, bool switch_off_field ){
+
+ UsbCommand c = {CMD_MIFAREUC_AUTH, {switch_off_field}};
+ memcpy(c.d.asBytes, key, 16);
+ SendCommand(&c);
+ UsbCommand resp;
+ if ( !WaitForResponseTimeout(CMD_ACK, &resp, 1500) ) return 0;
+ if ( resp.arg[0] == 1 ) return 1;
+
+ return 0;
+}
+
+static int ulev1_requestAuthentication( uint8_t *pwd, uint8_t *pack, uint16_t packLength ){
+
+ uint8_t cmd[] = {MIFARE_ULEV1_AUTH, pwd[0], pwd[1], pwd[2], pwd[3]};
+ int len = ul_send_cmd_raw(cmd, sizeof(cmd), pack, packLength);
+ return len;
+}
+
+static int ul_auth_select( iso14a_card_select_t *card, TagTypeUL_t tagtype, bool hasAuthKey, uint8_t *authenticationkey, uint8_t *pack, uint8_t packSize){
+ if ( hasAuthKey && (tagtype & UL_C)) {
+ //will select card automatically and close connection on error
+ if (!ulc_authentication(authenticationkey, false)) {
+ PrintAndLog("Error: Authentication Failed UL-C");
+ return 0;
+ }
memcpy(card, resp.d.asBytes, sizeof(iso14a_card_select_t));
return 1;
}
static int ulev1_getVersion( uint8_t *response, uint16_t responseLength ){
-
+
uint8_t cmd[] = {MIFARE_ULEV1_VERSION};
int len = ul_send_cmd_raw(cmd, sizeof(cmd), response, responseLength);
return len;
}
static int ul_print_default( uint8_t *data){
-
+
uint8_t uid[7];
uid[0] = data[0];
uid[1] = data[1];
uid[6] = data[7];
PrintAndLog(" UID : %s ", sprint_hex(uid, 7));
- PrintAndLog(" UID[0] : %02X, %s", uid[0], getTagInfo(uid[0]) );
+ PrintAndLog(" UID[0] : %02X, Manufacturer: %s", uid[0], getTagInfo(uid[0]) );
if ( uid[0] == 0x05 ) {
uint8_t chip = (data[8] & 0xC7); // 11000111 mask, bit 3,4,5 RFU
switch (chip){
PrintAndLog(" BCC0 : %02X, Ok", data[3]);
else
PrintAndLog(" BCC0 : %02X, crc should be %02X", data[3], crc0);
-
+
int crc1 = data[4] ^ data[5] ^ data[6] ^data[7];
if ( data[8] == crc1 )
PrintAndLog(" BCC1 : %02X, Ok", data[8]);
else
PrintAndLog(" BCC1 : %02X, crc should be %02X", data[8], crc1 );
-
+
PrintAndLog(" Internal : %02X, %sdefault", data[9], (data[9]==0x48)?"":"not " );
PrintAndLog(" Lock : %s - %s",
printBits(2, data+10)
);
- PrintAndLog("OneTimePad : %s - %s\n",
- sprint_hex(data + 12, 4),
- printBits(4, data+12)
- );
+ PrintAndLog("OneTimePad : %s - %s\n",
+ sprint_hex(data + 12, 4),
+ printBits(4, data+12)
+ );
+
+ return 0;
+}
+
+static int ndef_print_CC(uint8_t *data) {
+ // no NDEF message
+ if(data[0] != 0xe1)
+ return -1;
+
+ PrintAndLog("--- NDEF Message");
+ PrintAndLog("Capability Container: %s", sprint_hex(data,4) );
+ PrintAndLog(" %02X : NDEF Magic Number", data[0]);
+ PrintAndLog(" %02X : version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
+ PrintAndLog(" %02X : Physical Memory Size: %d bytes", data[2], (data[2] + 1) * 8);
+ if ( data[2] == 0x12 )
+ PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 144);
+ else if ( data[2] == 0x3e )
+ PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 496);
+ else if ( data[2] == 0x6d )
+ PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 872);
+
+ PrintAndLog(" %02X : %s / %s", data[3],
+ (data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security",
+ (data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
+ return 0;
+}
+
+int ul_print_type(uint32_t tagtype, uint8_t spaces){
+ char spc[11] = " ";
+ spc[10]=0x00;
+ char *spacer = spc + (10-spaces);
+
+ if ( tagtype & UL )
+ PrintAndLog("%sTYPE : MIFARE Ultralight (MF0ICU1) %s", spacer, (tagtype & MAGIC) ? "<magic>" : "" );
+ else if ( tagtype & UL_C)
+ PrintAndLog("%sTYPE : MIFARE Ultralight C (MF0ULC) %s", spacer, (tagtype & MAGIC) ? "<magic>" : "" );
+ else if ( tagtype & UL_EV1_48)
+ PrintAndLog("%sTYPE : MIFARE Ultralight EV1 48bytes (MF0UL1101)", spacer);
+ else if ( tagtype & UL_EV1_128)
+ PrintAndLog("%sTYPE : MIFARE Ultralight EV1 128bytes (MF0UL2101)", spacer);
+ else if ( tagtype & NTAG )
+ PrintAndLog("%sTYPE : NTAG UNKNOWN", spacer);
+ else if ( tagtype & NTAG_203 )
+ PrintAndLog("%sTYPE : NTAG 203 144bytes (NT2H0301F0DT)", spacer);
+ else if ( tagtype & NTAG_210 )
+ PrintAndLog("%sTYPE : NTAG 210 48bytes (NT2L1011G0DU)", spacer);
+ else if ( tagtype & NTAG_212 )
+ PrintAndLog("%sTYPE : NTAG 212 128bytes (NT2L1211G0DU)", spacer);
+ else if ( tagtype & NTAG_213 )
+ PrintAndLog("%sTYPE : NTAG 213 144bytes (NT2H1311G0DU)", spacer);
+ else if ( tagtype & NTAG_215 )
+ PrintAndLog("%sTYPE : NTAG 215 504bytes (NT2H1511G0DU)", spacer);
+ else if ( tagtype & NTAG_216 )
+ PrintAndLog("%sTYPE : NTAG 216 888bytes (NT2H1611G0DU)", spacer);
+ else if ( tagtype & NTAG_I2C_1K )
+ PrintAndLog("%sTYPE : NTAG I%sC 888bytes (NT3H1101FHK)", spacer, "\xFD");
+ else if ( tagtype & NTAG_I2C_2K )
+ PrintAndLog("%sTYPE : NTAG I%sC 1904bytes (NT3H1201FHK)", spacer, "\xFD");
+ else if ( tagtype & MY_D )
+ PrintAndLog("%sTYPE : INFINEON my-d\x99", spacer);
+ else if ( tagtype & MY_D_NFC )
+ PrintAndLog("%sTYPE : INFINEON my-d\x99 NFC", spacer);
+ else if ( tagtype & MY_D_MOVE )
+ PrintAndLog("%sTYPE : INFINEON my-d\x99 move", spacer);
+ else if ( tagtype & MY_D_MOVE_NFC )
+ PrintAndLog("%sTYPE : INFINEON my-d\x99 move NFC", spacer);
+ else
+ PrintAndLog("%sTYPE : Unknown %06x", spacer, tagtype);
+ return 0;
+}
+
+static int ulc_print_3deskey( uint8_t *data){
+ PrintAndLog(" deskey1 [44/0x2C] : %s [%.4s]", sprint_hex(data ,4),data);
+ PrintAndLog(" deskey1 [45/0x2D] : %s [%.4s]", sprint_hex(data+4 ,4),data+4);
+ PrintAndLog(" deskey2 [46/0x2E] : %s [%.4s]", sprint_hex(data+8 ,4),data+8);
+ PrintAndLog(" deskey2 [47/0x2F] : %s [%.4s]", sprint_hex(data+12,4),data+12);
+ PrintAndLog("\n 3des key : %s", sprint_hex(SwapEndian64(data, 16, 8), 16));
+ return 0;
+}
+
+static int ulc_print_configuration( uint8_t *data){
+
+ PrintAndLog("--- UL-C Configuration");
+ PrintAndLog(" Higher Lockbits [40/0x28] : %s - %s", sprint_hex(data, 4), printBits(2, data));
+ PrintAndLog(" Counter [41/0x29] : %s - %s", sprint_hex(data+4, 4), printBits(2, data+4));
+
+ bool validAuth = (data[8] >= 0x03 && data[8] <= 0x30);
+ if ( validAuth )
+ PrintAndLog(" Auth0 [42/0x2A] : %s page %d/0x%02X and above need authentication", sprint_hex(data+8, 4), data[8],data[8] );
+ else{
+ if ( data[8] == 0){
+ PrintAndLog(" Auth0 [42/0x2A] : %s default", sprint_hex(data+8, 4) );
+ } else {
+ PrintAndLog(" Auth0 [42/0x2A] : %s auth byte is out-of-range", sprint_hex(data+8, 4) );
+ }
+ }
+ PrintAndLog(" Auth1 [43/0x2B] : %s %s",
+ sprint_hex(data+12, 4),
+ (data[12] & 1) ? "write access restricted": "read and write access restricted"
+ );
+ return 0;
+}
+
+static int ulev1_print_configuration( uint8_t *data, uint8_t startPage){
+
+ PrintAndLog("\n--- Tag Configuration");
+
+ bool strg_mod_en = (data[0] & 2);
+ uint8_t authlim = (data[4] & 0x07);
+ bool cfglck = (data[4] & 0x40);
+ bool prot = (data[4] & 0x80);
+ uint8_t vctid = data[5];
+
+ PrintAndLog(" cfg0 [%u/0x%02X] : %s", startPage, startPage, sprint_hex(data, 4));
+ if ( data[3] < 0xff )
+ PrintAndLog(" - page %d and above need authentication",data[3]);
+ else
+ PrintAndLog(" - pages don't need authentication");
+ PrintAndLog(" - strong modulation mode %s", (strg_mod_en) ? "enabled":"disabled");
+ PrintAndLog(" cfg1 [%u/0x%02X] : %s", startPage + 1, startPage + 1, sprint_hex(data+4, 4) );
+ if ( authlim == 0)
+ PrintAndLog(" - Unlimited password attempts");
+ else
+ PrintAndLog(" - Max number of password attempts is %d", authlim);
+ PrintAndLog(" - user configuration %s", cfglck ? "permanently locked":"writeable");
+ PrintAndLog(" - %s access is protected with password", prot ? "read and write":"write");
+ PrintAndLog(" - %02X, Virtual Card Type Identifier is %s default", vctid, (vctid==0x05)? "":"not");
+ PrintAndLog(" PWD [%u/0x%02X] : %s- (cannot be read)", startPage + 2, startPage + 2, sprint_hex(data+8, 4));
+ PrintAndLog(" PACK [%u/0x%02X] : %s - (cannot be read)", startPage + 3, startPage + 3, sprint_hex(data+12, 2));
+ PrintAndLog(" RFU [%u/0x%02X] : %s- (cannot be read)", startPage + 3, startPage + 3, sprint_hex(data+12, 2));
+ return 0;
+}
+
+static int ulev1_print_counters(){
+ PrintAndLog("--- Tag Counters");
+ uint8_t tear[1] = {0};
+ uint8_t counter[3] = {0,0,0};
+ uint16_t len = 0;
+ for ( uint8_t i = 0; i<3; ++i) {
+ ulev1_readTearing(i,tear,sizeof(tear));
+ len = ulev1_readCounter(i,counter, sizeof(counter) );
+ if (len == 3) {
+ PrintAndLog(" [%0d] : %s", i, sprint_hex(counter,3));
+ PrintAndLog(" - %02X tearing %s", tear[0], ( tear[0]==0xBD)?"Ok":"failure");
+ }
+ }
+ return len;
+}
+
+static int ulev1_print_signature( uint8_t *data, uint8_t len){
+ PrintAndLog("\n--- Tag Signature");
+ //PrintAndLog("IC signature public key name : NXP NTAG21x 2013"); // don't know if there is other NXP public keys.. :(
+ PrintAndLog("IC signature public key value : 04494e1a386d3d3cfe3dc10e5de68a499b1c202db5b132393e89ed19fe5be8bc61");
+ PrintAndLog(" Elliptic curve parameters : secp128r1");
+ PrintAndLog(" Tag ECC Signature : %s", sprint_hex(data, len));
+ //to do: verify if signature is valid
+ //PrintAndLog("IC signature status: %s valid", (iseccvalid() )?"":"not");
+ return 0;
+}
+
+static int ulev1_print_version(uint8_t *data){
+ PrintAndLog("\n--- Tag Version");
+ PrintAndLog(" Raw bytes : %s",sprint_hex(data, 8) );
+ PrintAndLog(" Vendor ID : %02X, %s", data[1], getTagInfo(data[1]));
+ PrintAndLog(" Product type : %s", getProductTypeStr(data[2]));
+ PrintAndLog(" Product subtype : %02X, %s", data[3], (data[3]==1) ?"17 pF":"50pF");
+ PrintAndLog(" Major version : %02X", data[4]);
+ PrintAndLog(" Minor version : %02X", data[5]);
+ PrintAndLog(" Size : %s", getUlev1CardSizeStr(data[6]));
+ PrintAndLog(" Protocol type : %02X", data[7]);
+ return 0;
+}
+
+/*
+static int ulc_magic_test(){
+ // Magic Ultralight test
+ // Magic UL-C, by observation,
+ // 1) it seems to have a static nonce response to 0x1A command.
+ // 2) the deskey bytes is not-zero:d out on as datasheet states.
+ // 3) UID - changeable, not only, but pages 0-1-2-3.
+ // 4) use the ul_magic_test ! magic tags answers specially!
+ int returnValue = UL_ERROR;
+ iso14a_card_select_t card;
+ uint8_t nonce1[11] = {0x00};
+ uint8_t nonce2[11] = {0x00};
+ int status = ul_select(&card);
+ if ( !status ){
+ return UL_ERROR;
+ }
+ status = ulc_requestAuthentication(nonce1, sizeof(nonce1));
+ if ( status > 0 ) {
+ status = ulc_requestAuthentication(nonce2, sizeof(nonce2));
+ returnValue = ( !memcmp(nonce1, nonce2, 11) ) ? UL_C_MAGIC : UL_C;
+ } else {
+ returnValue = UL;
+ }
+ ul_switch_off_field();
+ return returnValue;
+}
+*/
+static int ul_magic_test(){
+
+ // Magic Ultralight tests
+ // 1) take present UID, and try to write it back. OBSOLETE
+ // 2) make a wrong length write to page0, and see if tag answers with ACK/NACK:
+ iso14a_card_select_t card;
+ if ( !ul_select(&card) )
+ return UL_ERROR;
+ int status = ul_comp_write(0, NULL, 0);
+ ul_switch_off_field();
+ if ( status == 0 )
+ return MAGIC;
+ return 0;
+}
+
+uint32_t GetHF14AMfU_Type(void){
+
+ TagTypeUL_t tagtype = UNKNOWN;
+ iso14a_card_select_t card;
+ uint8_t version[10] = {0x00};
+ int status = 0;
+ int len;
+
+ if (!ul_select(&card)) return UL_ERROR;
+
+ // Ultralight - ATQA / SAK
+ if ( card.atqa[1] != 0x00 || card.atqa[0] != 0x44 || card.sak != 0x00 ) {
+ PrintAndLog("Tag is not Ultralight | NTAG | MY-D [ATQA: %02X %02X SAK: %02X]\n", card.atqa[1], card.atqa[0], card.sak);
+ ul_switch_off_field();
+ return UL_ERROR;
+ }
+
+ if ( card.uid[0] != 0x05) {
+
+ len = ulev1_getVersion(version, sizeof(version));
+ ul_switch_off_field();
+
+ switch (len) {
+ case 0x0A: {
+
+ if ( version[2] == 0x03 && version[6] == 0x0B )
+ tagtype = UL_EV1_48;
+ else if ( version[2] == 0x03 && version[6] != 0x0B )
+ tagtype = UL_EV1_128;
+ else if ( version[2] == 0x04 && version[3] == 0x01 && version[6] == 0x0B )
+ tagtype = NTAG_210;
+ else if ( version[2] == 0x04 && version[3] == 0x01 && version[6] == 0x0E )
+ tagtype = NTAG_212;
+ else if ( version[2] == 0x04 && version[3] == 0x02 && version[6] == 0x0F )
+ tagtype = NTAG_213;
+ else if ( version[2] == 0x04 && version[3] == 0x02 && version[6] == 0x11 )
+ tagtype = NTAG_215;
+ else if ( version[2] == 0x04 && version[3] == 0x02 && version[6] == 0x13 )
+ tagtype = NTAG_216;
+ else if ( version[2] == 0x04 && version[3] == 0x05 && version[6] == 0x13 )
+ tagtype = NTAG_I2C_1K;
+ else if ( version[2] == 0x04 && version[3] == 0x05 && version[6] == 0x15 )
+ tagtype = NTAG_I2C_2K;
+ else if ( version[2] == 0x04 )
+ tagtype = NTAG;
+
+ break;
+ }
+ case 0x01: tagtype = UL_C; break;
+ case 0x00: tagtype = UL; break;
+ case -1 : tagtype = (UL | UL_C | NTAG_203); break; // could be UL | UL_C magic tags
+ default : tagtype = UNKNOWN; break;
+ }
+ // UL vs UL-C vs ntag203 test
+ if (tagtype & (UL | UL_C | NTAG_203)) {
+ if ( !ul_select(&card) ) return UL_ERROR;
+
+ // do UL_C check first...
+ uint8_t nonce[11] = {0x00};
+ status = ulc_requestAuthentication(nonce, sizeof(nonce));
+ ul_switch_off_field();
+ if (status > 1) {
+ tagtype = UL_C;
+ } else {
+ // need to re-select after authentication error
+ if ( !ul_select(&card) ) return UL_ERROR;
+
+ uint8_t data[16] = {0x00};
+ // read page 0x26-0x29 (last valid ntag203 page)
+ status = ul_read(0x26, data, sizeof(data));
+ if ( status <= 1 ) {
+ tagtype = UL;
+ } else {
+ // read page 0x30 (should error if it is a ntag203)
+ status = ul_read(0x30, data, sizeof(data));
+ if ( status <= 1 ){
+ tagtype = NTAG_203;
+ } else {
+ tagtype = UNKNOWN;
+ }
+ }
+ ul_switch_off_field();
+ }
+ }
+ } else {
+ // Infinition MY-D tests Exam high nibble
+ uint8_t nib = (card.uid[1] & 0xf0) >> 4;
+ switch ( nib ){
+ case 1: tagtype = MY_D; break;
+ case 2: tagtype = (MY_D | MY_D_NFC); break; //notice: we can not currently distinguish between these two
+ case 3: tagtype = (MY_D_MOVE | MY_D_MOVE_NFC); break; //notice: we can not currently distinguish between these two
+ }
+ }
+
+ tagtype |= ul_magic_test();
+ if (tagtype == (UNKNOWN | MAGIC)) tagtype = (UL_MAGIC);
+ return tagtype;
+}
+
+int CmdHF14AMfUInfo(const char *Cmd){
+
+ uint8_t authlim = 0xff;
+ uint8_t data[16] = {0x00};
+ iso14a_card_select_t card;
+ int status;
+ bool errors = false;
+ bool hasAuthKey = false;
+ bool locked = false;
+ bool swapEndian = false;
+ uint8_t cmdp = 0;
+ uint8_t dataLen = 0;
+ uint8_t authenticationkey[16] = {0x00};
+ uint8_t *authkeyptr = authenticationkey;
+ uint8_t *key;
+ uint8_t pack[4] = {0,0,0,0};
+ int len = 0;
+ char tempStr[50];
+
+ while(param_getchar(Cmd, cmdp) != 0x00)
+ {
+ switch(param_getchar(Cmd, cmdp))
+ {
+ case 'h':
+ case 'H':
+ return usage_hf_mfu_info();
+ case 'k':
+ case 'K':
+ dataLen = param_getstr(Cmd, cmdp+1, tempStr);
+ if (dataLen == 32 || dataLen == 8) { //ul-c or ev1/ntag key length
+ errors = param_gethex(tempStr, 0, authenticationkey, dataLen);
+ dataLen /= 2; // handled as bytes from now on
+ } else {
+ PrintAndLog("\nERROR: Key is incorrect length\n");
+ errors = true;
+ }
+ cmdp += 2;
+ hasAuthKey = true;
+ break;
+ case 'l':
+ case 'L':
+ swapEndian = true;
+ cmdp++;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = true;
+ break;
+ }
+ if(errors) break;
+ }
+
+ //Validations
+ if(errors) return usage_hf_mfu_info();
+
+ TagTypeUL_t tagtype = GetHF14AMfU_Type();
+ if (tagtype == UL_ERROR) return -1;
+
+ PrintAndLog("\n--- Tag Information ---------");
+ PrintAndLog("-------------------------------------------------------------");
+ ul_print_type(tagtype, 6);
+
+ // Swap endianness
+ if (swapEndian && hasAuthKey) authkeyptr = SwapEndian64(authenticationkey, dataLen, (dataLen == 16) ? 8 : 4 );
+
+ if (!ul_auth_select( &card, tagtype, hasAuthKey, authkeyptr, pack, sizeof(pack))) return -1;
+
+ // read pages 0,1,2,3 (should read 4pages)
+ status = ul_read(0, data, sizeof(data));
+ if ( status == -1 ) {
+ ul_switch_off_field();
+ PrintAndLog("Error: tag didn't answer to READ");
+ return status;
+ } else if (status == 16) {
+ ul_print_default(data);
+ ndef_print_CC(data+12);
+ } else {
+ locked = true;
+ }
+
+ // UL_C Specific
+ if ((tagtype & UL_C)) {
- return 0;
-}
+ // read pages 0x28, 0x29, 0x2A, 0x2B
+ uint8_t ulc_conf[16] = {0x00};
+ status = ul_read(0x28, ulc_conf, sizeof(ulc_conf));
+ if ( status == -1 ){
+ PrintAndLog("Error: tag didn't answer to READ UL-C");
+ ul_switch_off_field();
+ return status;
+ }
+ if (status == 16) ulc_print_configuration(ulc_conf);
+ else locked = true;
-static int ndef_print_CC(uint8_t *data) {
- // no NDEF message
- if(data[0] != 0xe1)
- return -1;
+ if ((tagtype & MAGIC)) {
+ //just read key
+ uint8_t ulc_deskey[16] = {0x00};
+ status = ul_read(0x2C, ulc_deskey, sizeof(ulc_deskey));
+ if ( status == -1 ) {
+ ul_switch_off_field();
+ PrintAndLog("Error: tag didn't answer to READ magic");
+ return status;
+ }
+ if (status == 16) ulc_print_3deskey(ulc_deskey);
- PrintAndLog("--- NDEF Message");
- PrintAndLog("Capability Container: %s", sprint_hex(data,4) );
- PrintAndLog(" %02X : NDEF Magic Number", data[0]);
- PrintAndLog(" %02X : version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
- PrintAndLog(" %02X : Physical Memory Size: %d bytes", data[2], (data[2] + 1) * 8);
- if ( data[2] == 0x12 )
- PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 144);
- else if ( data[2] == 0x3e )
- PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 496);
- else if ( data[2] == 0x6d )
- PrintAndLog(" %02X : NDEF Memory Size: %d bytes", data[2], 872);
-
- PrintAndLog(" %02X : %s / %s", data[3],
- (data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security",
- (data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
- return 0;
-}
+ } else {
+ ul_switch_off_field();
+ // if we called info with key, just return
+ if ( hasAuthKey ) return 1;
-int ul_print_type(uint32_t tagtype, uint8_t spaces){
- char spc[11] = " ";
- spc[10]=0x00;
- char *spacer = spc + (10-spaces);
+ // also try to diversify default keys.. look into CmdHF14AMfuGenDiverseKeys
+ PrintAndLog("Trying some default 3des keys");
+ for (uint8_t i = 0; i < KEYS_3DES_COUNT; ++i ) {
+ key = default_3des_keys[i];
+ if (ulc_authentication(key, true)) {
+ PrintAndLog("Found default 3des key: ");
+ uint8_t keySwap[16];
+ memcpy(keySwap, SwapEndian64(key,16,8), 16);
+ ulc_print_3deskey(keySwap);
+ return 1;
+ }
+ }
+ return 1;
+ }
+ }
- if ( tagtype & UL )
- PrintAndLog("%sTYPE : MIFARE Ultralight (MF0ICU1) %s", spacer, (tagtype & MAGIC) ? "<magic>" : "" );
- else if ( tagtype & UL_C)
- PrintAndLog("%sTYPE : MIFARE Ultralight C (MF0ULC) %s", spacer, (tagtype & MAGIC) ? "<magic>" : "" );
- else if ( tagtype & UL_EV1_48)
- PrintAndLog("%sTYPE : MIFARE Ultralight EV1 48bytes (MF0UL1101)", spacer);
- else if ( tagtype & UL_EV1_128)
- PrintAndLog("%sTYPE : MIFARE Ultralight EV1 128bytes (MF0UL2101)", spacer);
- else if ( tagtype & NTAG )
- PrintAndLog("%sTYPE : NTAG UNKNOWN", spacer);
- else if ( tagtype & NTAG_203 )
- PrintAndLog("%sTYPE : NTAG 203 144bytes (NT2H0301F0DT)", spacer);
- else if ( tagtype & NTAG_210 )
- PrintAndLog("%sTYPE : NTAG 210 48bytes (NT2L1011G0DU)", spacer);
- else if ( tagtype & NTAG_212 )
- PrintAndLog("%sTYPE : NTAG 212 128bytes (NT2L1211G0DU)", spacer);
- else if ( tagtype & NTAG_213 )
- PrintAndLog("%sTYPE : NTAG 213 144bytes (NT2H1311G0DU)", spacer);
- else if ( tagtype & NTAG_215 )
- PrintAndLog("%sTYPE : NTAG 215 504bytes (NT2H1511G0DU)", spacer);
- else if ( tagtype & NTAG_216 )
- PrintAndLog("%sTYPE : NTAG 216 888bytes (NT2H1611G0DU)", spacer);
- else if ( tagtype & NTAG_I2C_1K )
- PrintAndLog("%sTYPE : NTAG I%sC 888bytes (NT3H1101FHK)", spacer, "\xFD");
- else if ( tagtype & NTAG_I2C_2K )
- PrintAndLog("%sTYPE : NTAG I%sC 1904bytes (NT3H1201FHK)", spacer, "\xFD");
- else if ( tagtype & MY_D )
- PrintAndLog("%sTYPE : INFINEON my-d\x99", spacer);
- else if ( tagtype & MY_D_NFC )
- PrintAndLog("%sTYPE : INFINEON my-d\x99 NFC", spacer);
- else if ( tagtype & MY_D_MOVE )
- PrintAndLog("%sTYPE : INFINEON my-d\x99 move", spacer);
- else if ( tagtype & MY_D_MOVE_NFC )
- PrintAndLog("%sTYPE : INFINEON my-d\x99 move NFC", spacer);
- else
- PrintAndLog("%sTYPE : Unknown %06x", spacer, tagtype);
- return 0;
-}
+ // do counters and signature first (don't neet auth)
-static int ulc_print_3deskey( uint8_t *data){
- PrintAndLog(" deskey1 [44/0x2C] : %s [%.4s]", sprint_hex(data ,4),data);
- PrintAndLog(" deskey1 [45/0x2D] : %s [%.4s]", sprint_hex(data+4 ,4),data+4);
- PrintAndLog(" deskey2 [46/0x2E] : %s [%.4s]", sprint_hex(data+8 ,4),data+8);
- PrintAndLog(" deskey2 [47/0x2F] : %s [%.4s]", sprint_hex(data+12,4),data+12);
- PrintAndLog("\n 3des key : %s", sprint_hex(SwapEndian64(data, 16, 8), 16));
- return 0;
-}
+ // ul counters are different than ntag counters
+ if ((tagtype & (UL_EV1_48 | UL_EV1_128))) {
+ if (ulev1_print_counters() != 3) {
+ // failed - re-select
+ if (!ul_auth_select( &card, tagtype, hasAuthKey, authkeyptr, pack, sizeof(pack))) return -1;
+ }
+ }
-static int ulc_print_configuration( uint8_t *data){
-
- PrintAndLog("--- UL-C Configuration");
- PrintAndLog(" Higher Lockbits [40/0x28] : %s - %s", sprint_hex(data, 4), printBits(2, data));
- PrintAndLog(" Counter [41/0x29] : %s - %s", sprint_hex(data+4, 4), printBits(2, data+4));
+ if ((tagtype & (UL_EV1_48 | UL_EV1_128 | NTAG_213 | NTAG_215 | NTAG_216 | NTAG_I2C_1K | NTAG_I2C_2K ))) {
+ uint8_t ulev1_signature[32] = {0x00};
+ status = ulev1_readSignature( ulev1_signature, sizeof(ulev1_signature));
+ if ( status == -1 ) {
+ PrintAndLog("Error: tag didn't answer to READ SIGNATURE");
+ ul_switch_off_field();
+ return status;
+ }
+ if (status == 32) ulev1_print_signature( ulev1_signature, sizeof(ulev1_signature));
+ else {
+ // re-select
+ if (!ul_auth_select( &card, tagtype, hasAuthKey, authkeyptr, pack, sizeof(pack))) return -1;
+ }
+ }
- bool validAuth = (data[8] >= 0x03 && data[8] <= 0x30);
- if ( validAuth )
- PrintAndLog(" Auth0 [42/0x2A] : %s page %d/0x%02X and above need authentication", sprint_hex(data+8, 4), data[8],data[8] );
- else{
- if ( data[8] == 0){
- PrintAndLog(" Auth0 [42/0x2A] : %s default", sprint_hex(data+8, 4) );
+ if ((tagtype & (UL_EV1_48 | UL_EV1_128 | NTAG_210 | NTAG_212 | NTAG_213 | NTAG_215 | NTAG_216 | NTAG_I2C_1K | NTAG_I2C_2K))) {
+ uint8_t version[10] = {0x00};
+ status = ulev1_getVersion(version, sizeof(version));
+ if ( status == -1 ) {
+ PrintAndLog("Error: tag didn't answer to GETVERSION");
+ ul_switch_off_field();
+ return status;
+ } else if (status == 10) {
+ ulev1_print_version(version);
} else {
- PrintAndLog(" Auth0 [42/0x2A] : %s auth byte is out-of-range", sprint_hex(data+8, 4) );
+ locked = true;
+ if (!ul_auth_select( &card, tagtype, hasAuthKey, authkeyptr, pack, sizeof(pack))) return -1;
+ }
+
+ uint8_t startconfigblock = 0;
+ uint8_t ulev1_conf[16] = {0x00};
+ // config blocks always are last 4 pages
+ for (uint8_t idx = 0; idx < MAX_UL_TYPES; idx++)
+ if (tagtype & UL_TYPES_ARRAY[idx])
+ startconfigblock = UL_MEMORY_ARRAY[idx]-3;
+
+ if (startconfigblock){ // if we know where the config block is...
+ status = ul_read(startconfigblock, ulev1_conf, sizeof(ulev1_conf));
+ if ( status == -1 ) {
+ PrintAndLog("Error: tag didn't answer to READ EV1");
+ ul_switch_off_field();
+ return status;
+ } else if (status == 16) {
+ // save AUTHENTICATION LIMITS for later:
+ authlim = (ulev1_conf[4] & 0x07);
+ ulev1_print_configuration(ulev1_conf, startconfigblock);
+ }
+ }
+
+ // AUTHLIMIT, (number of failed authentications)
+ // 0 = limitless.
+ // 1-7 = limit. No automatic tries then.
+ // hasAuthKey, if we was called with key, skip test.
+ if ( !authlim && !hasAuthKey ) {
+ PrintAndLog("\n--- Known EV1/NTAG passwords.");
+ len = 0;
+ for (uint8_t i = 0; i < KEYS_PWD_COUNT; ++i ) {
+ key = default_pwd_pack[i];
+ len = ulev1_requestAuthentication(key, pack, sizeof(pack));
+ if (len >= 1) {
+ PrintAndLog("Found a default password: %s || Pack: %02X %02X",sprint_hex(key, 4), pack[0], pack[1]);
+ break;
+ } else {
+ if (!ul_auth_select( &card, tagtype, hasAuthKey, authkeyptr, pack, sizeof(pack))) return -1;
+ }
+ }
+ if (len < 1) PrintAndLog("password not known");
}
}
- PrintAndLog(" Auth1 [43/0x2B] : %s %s",
- sprint_hex(data+12, 4),
- (data[12] & 1) ? "write access restricted": "read and write access restricted"
- );
- return 0;
+
+ ul_switch_off_field();
+ if (locked) PrintAndLog("\nTag appears to be locked, try using the key to get more info");
+ PrintAndLog("");
+ return 1;
}
-static int ulev1_print_configuration( uint8_t *data){
+//
+// Mifare Ultralight Write Single Block
+//
+int CmdHF14AMfUWrBl(const char *Cmd){
+ uint8_t blockNo = -1;
+ bool chinese_card = FALSE;
+ uint8_t bldata[16] = {0x00};
+ UsbCommand resp;
PrintAndLog("\n--- Tag Configuration");
return 0;
}
-uint32_t GetHF14AMfU_Type(void){
-
- TagTypeUL_t tagtype = UNKNOWN;
- iso14a_card_select_t card;
- uint8_t version[10] = {0x00};
- int status = 0;
- int len;
-
- if (!ul_select(&card)) return UL_ERROR;
-
- // Ultralight - ATQA / SAK
- if ( card.atqa[1] != 0x00 || card.atqa[0] != 0x44 || card.sak != 0x00 ) {
- PrintAndLog("Tag is not Ultralight | NTAG | MY-D [ATQA: %02X %02X SAK: %02X]\n", card.atqa[1], card.atqa[0], card.sak);
- ul_switch_off_field();
- return UL_ERROR;
+ if (blockNo > MAX_UL_BLOCKS){
+ PrintAndLog("Error: Maximum number of blocks is 15 for Ultralight Cards!");
+ return 1;
}
if ( card.uid[0] != 0x05) {
//Validations
if(errors) return usage_hf_mfu_rdbl();
}
-
if ( blockNo == -1 ) return usage_hf_mfu_rdbl();
// Swap endianness
}
SendCommand(&c);
- UsbCommand resp;
+
if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
uint8_t isOK = resp.arg[0] & 0xff;
if (isOK) {
} else {
PrintAndLog("Command execute time-out");
}
+
return 0;
}
FILE *fout;
char filename[FILE_PATH_SIZE] = {0x00};
- char * fnameptr = filename;
+ char *fnameptr = filename;
uint8_t *lockbytes_t = NULL;
uint8_t lockbytes[2] = {0x00};
uint8_t *lockbytes_t2 = NULL;
int i = 0;
int Pages = 16;
bool tmplockbit = false;
- uint8_t dataLen=0;
- uint8_t cmdp =0;
+ uint8_t dataLen = 0;
+ uint8_t cmdp = 0;
uint8_t authenticationkey[16] = {0x00};
- uint8_t *authKeyPtr = authenticationkey;
+ uint8_t *authKeyPtr = authenticationkey;
size_t fileNlen = 0;
bool errors = false;
bool swapEndian = false;
//Validations
if(errors) return usage_hf_mfu_dump();
-
+
if (swapEndian && hasAuthKey)
authKeyPtr = SwapEndian64(authenticationkey, dataLen, (dataLen == 16) ? 8 : 4);
TagTypeUL_t tagtype = GetHF14AMfU_Type();
if (tagtype == UL_ERROR) return -1;
-
+
if (!manualPages)
for (uint8_t idx = 0; idx < MAX_UL_TYPES; idx++)
if (tagtype & UL_TYPES_ARRAY[idx])
ul_print_type(tagtype, 0);
PrintAndLog("Reading tag memory...");
UsbCommand c = {CMD_MIFAREU_READCARD, {startPage,Pages}};
- if ( hasAuthKey ) {
+ if ( hasAuthKey ) {
if (tagtype & UL_C)
c.arg[2] = 1; //UL_C auth
else
}
SendCommand(&c);
UsbCommand resp;
- if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
+ if (!WaitForResponseTimeout(CMD_ACK, &resp,1500)) {
PrintAndLog("Command execute time-out");
return 1;
}
Pages = bufferSize/4;
// Load lock bytes.
int j = 0;
-
+
lockbytes_t = data + 8;
lockbytes[0] = lockbytes_t[2];
lockbytes[1] = lockbytes_t[3];
for(j = 0; j < 16; j++){
bit[j] = lockbytes[j/8] & ( 1 <<(7-j%8));
- }
-
+ }
+
// Load bottom lockbytes if available
// TODO -- FIGURE OUT LOCK BYTES FOR TO EV1 and/or NTAG
if ( Pages == 44 ) {
// add keys to block dump
if (hasAuthKey) {
- if (!swapEndian) {
+ if (!swapEndian){
authKeyPtr = SwapEndian64(authenticationkey, dataLen, (dataLen == 16) ? 8 : 4);
- memcpy(data + Pages*4, authKeyPtr, dataLen);
} else {
- memcpy(data + Pages*4, authenticationkey, dataLen);
+ authKeyPtr = authenticationkey;
+ }
+
+ if (tagtype & UL_C){ //add 4 pages
+ memcpy(data + Pages*4, authKeyPtr, dataLen);
+ Pages += dataLen/4;
+ } else { // 2nd page from end
+ memcpy(data + (Pages*4) - 8, authenticationkey, dataLen);
}
- Pages += dataLen/4; //not sure output is in correct location for all tag types.
}
-
+
for (i = 0; i < Pages; ++i) {
if ( i < 3 ) {
PrintAndLog("Block %02x:%s ", i,sprint_hex(data + i * 4, 4));
case 24:
case 25:
case 26:
- case 27: tmplockbit = bit2[4]; break;
+ case 27: tmplockbit = bit2[4]; break;
case 28:
case 29:
case 30:
case 43: tmplockbit = bit2[9]; break; //auth1
default: break;
}
- PrintAndLog("Block %02x:%s [%d] {%.4s}", i, sprint_hex(data + i * 4, 4), tmplockbit, data+i*4);
- }
-
+ PrintAndLog("Block %02X:%s [%d] {%.4s}", i, sprint_hex(data + i * 4, 4), tmplockbit, data+i*4);
+ }
+
// user supplied filename?
if (fileNlen < 1) {
// UID = data 0-1-2 4-5-6-7 (skips a beat)
sprintf(fnameptr,"%02X%02X%02X%02X%02X%02X%02X.bin",
- data[0], data[1], data[2], data[4], data[5], data[6], data[7]);
+ data[0],data[1], data[2], data[4],data[5],data[6], data[7]);
} else {
sprintf(fnameptr + fileNlen,".bin");
}
if ((fout = fopen(filename,"wb")) == NULL) {
PrintAndLog("Could not create file name %s", filename);
- return 1;
+ return 1;
}
fwrite( data, 1, Pages*4, fout );
fclose(fout);
//
int CmdHF14AMfucAuth(const char *Cmd){
- uint8_t keyNo = 0;
+ uint8_t keyNo = 3;
bool errors = false;
char cmdp = param_getchar(Cmd, 0);
PrintAndLog("Authentication successful. 3des key: %s",sprint_hex(key, 16));
else
PrintAndLog("Authentication failed");
-
+
return 0;
}
uint8_t pwd[16] = {0x00};
+ uint8_t key[16];
char cmdp = param_getchar(Cmd, 0);
-
+
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: hf mfu setpwd <password (32 hex symbols)>");
PrintAndLog(" [password] - (32 hex symbols)");
PrintAndLog("Password must include 32 HEX symbols");
return 1;
}
+
+ if (blockNo > MAX_ULC_BLOCKS ){
+ PrintAndLog("Error: Maximum number of blocks is 47 for Ultralight-C");
+ return 1;
+ }
UsbCommand c = {CMD_MIFAREUC_SETPWD};
memcpy( c.d.asBytes, pwd, 16);
PrintAndLog("Command execute timeout");
return 2;
}
-
+
// save old block2.
uint8_t oldblock2[4] = {0x00};
memcpy(resp.d.asBytes, oldblock2, 4);
PrintAndLog("Command execute timeout");
return 3;
}
-
+
// block 1.
c.arg[0] = 1;
c.d.asBytes[0] = uid[3];
projects / proxmark3-svn / blobdiff