PrintAndLog(" hf legic esave 2 myfile");
return 0;
}
-
+int usage_legic_wipe(void){
+ PrintAndLog("Fills a legic tag memory with zeros. From byte7 and to the end.");
+ PrintAndLog(" Usage: hf legic wipe [h]");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic wipe");
+ return 0;
+}
/*
* Output BigBuf and deobfuscate LEGIC RF tag data.
* This is based on information given in the talk held
return 1;
}
- PrintAndLog("\n ## | Data");
- PrintAndLog("-----+-----");
+ PrintAndLog("\n ## | 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
+ PrintAndLog("-----+------------------------------------------------------------------------------------------------");
print_hex_break( data, readlen, 32);
free(data);
return 0;
errors = true;
break;
}
+
+ // limit number of bytes to write. This is not a 'restore' command.
+ if ( (len>>1) > 100 ){
+ PrintAndLog("Max bound on 100bytes to write a one time.");
+ PrintAndLog("Use the 'hf legic restore' command if you want to write the whole tag at once");
+ errors = true;
+ }
// it's possible for user to accidentally enter "b" parameter
// more than once - we have to clean previous malloc
if (data)
free(data);
+
data = malloc(len >> 1);
if ( data == NULL ) {
PrintAndLog("Can't allocate memory. exiting");
legic_print_type(card.cardsize, 0);
// OUT-OF-BOUNDS checks
- // UID 4 bytes can't be written to.
- if ( offset < 4 ) {
- PrintAndLog("Out-of-bounds, UID 4bytes can't be written to. Offset = %d", offset);
+ // UID 4+1 bytes can't be written to.
+ if ( offset < 5 ) {
+ PrintAndLog("Out-of-bounds, bytes 0-1-2-3-4 can't be written to. Offset = %d", offset);
return -2;
}
- if ( len + offset + 4 >= card.cardsize ) {
- PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset + 4);
+ if ( len + offset >= card.cardsize ) {
+ PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset);
return -2;
}
+ if (offset == 5 || offset == 6) {
+ PrintAndLog("############# DANGER ################");
+ PrintAndLog("# changing the DCF is irreversible #");
+ PrintAndLog("#####################################");
+ char *answer = NULL;
+ answer = readline("do you really want to continue? y(es) n(o) : ");
+ bool overwrite = (answer[0] == 'y' || answer[0] == 'Y');
+ if (!overwrite){
+ PrintAndLog("command cancelled");
+ return 0;
+ }
+ }
+
legic_chk_iv(&IV);
PrintAndLog("Writing to tag");
- UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
- memcpy(c.d.asBytes, data, len);
-
- clearCommandBuffer();
- SendCommand(&c);
+
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
+ memcpy(c.d.asBytes, data, len);
UsbCommand resp;
- if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
PrintAndLog("command execution time out");
return 1;
}
PrintAndLog("failed writing tag");
return 1;
}
-
+
return 0;
}
-/*
- PrintAndLog("############# DANGER !! #############");
- PrintAndLog("# changing the DCF is irreversible #");
- PrintAndLog("#####################################");
- PrintAndLog("do youe really want to continue? y(es) n(o)");
- // if (scanf(" %c", &answer) > 0 && (answer == 'y' || answer == 'Y')) {
- // return 0;
- // }
-*/
-
int CmdLegicCalcCrc(const char *Cmd){
uint8_t *data = NULL;
char filename[FILE_PATH_SIZE] = {0x00};
char *fnameptr = filename;
size_t fileNlen = 0;
- bool errors = false;
+ bool errors = true;
uint16_t numofbytes;
uint8_t cmdp = 0;
case 'I':
fileNlen = param_getstr(Cmd, cmdp+1, filename);
if (!fileNlen)
- errors = true;
+ errors = true;
+ else
+ errors = false;
+
if (fileNlen > FILE_PATH_SIZE-5)
fileNlen = FILE_PATH_SIZE-5;
- cmdp += 2;
+ cmdp += 2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
- if(errors) break;
+ if (errors) break;
}
//Validations
uint8_t *data = malloc(numofbytes);
if (!data) {
PrintAndLog("Fail, cannot allocate memory");
- return 3;
+ return 2;
}
memset(data, 0, numofbytes);
// set up file
fnameptr += fileNlen;
sprintf(fnameptr, ".bin");
-
- PrintAndLog("Reading binary file...");
if ((f = fopen(filename,"rb")) == NULL) {
PrintAndLog("File %s not found or locked", filename);
- return 2;
+ return 3;
}
- // verify size of dumpfile is the same as card.
+ // verify size of dumpfile is the same as card.
+ fseek(f, 0, SEEK_END); // seek to end of file
+ size_t filesize = ftell(f); // get current file pointer
+ fseek(f, 0, SEEK_SET); // seek back to beginning of file
+
+ if ( filesize != numofbytes) {
+ PrintAndLog("Fail, filesize and cardsize is not equal. [%u != %u]", filesize, numofbytes);
+ free(data);
+ fclose(f);
+ return 4;
+ }
// load file
size_t bytes_read = fread(data, 1, numofbytes, f);
}
fclose(f);
- PrintAndLog("Restoring %s to card", filename);
+ PrintAndLog("Restoring to card");
- //loop writing :)
-
- //endloop
+ // transfer to device
+ size_t len = 0;
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+ UsbCommand resp;
+ for(size_t i = 7; i < numofbytes; i += USB_CMD_DATA_SIZE) {
+
+ len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);
+ c.arg[0] = i; // offset
+ c.arg[1] = len; // number of bytes
+ memcpy(c.d.asBytes, data+i, len);
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+ PrintAndLog("command execution time out");
+ free(data);
+ return 1;
+ }
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+ free(data);
+ return 1;
+ }
+ PrintAndLog("Wrote chunk [offset %d | len %d | total %d", i, len, i+len);
+ }
free(data);
- PrintAndLog("\nLoaded %d bytes from file: %s to emulator memory", numofbytes, filename);
+ PrintAndLog("\nWrote %d bytes to card from file %s", numofbytes, filename);
return 0;
}
return 0;
}
+int CmdLegicWipe(const char *Cmd){
+
+ char cmdp = param_getchar(Cmd, 0);
+
+ if ( cmdp == 'h' || cmdp == 'H') return usage_legic_wipe();
+
+ // tagtype
+ legic_card_select_t card;
+ if (legic_get_type(&card)) {
+ PrintAndLog("Failed to identify tagtype");
+ return 1;
+ }
+
+ // set up buffer
+ uint8_t *data = malloc(card.cardsize);
+ if (!data) {
+ PrintAndLog("Fail, cannot allocate memory");
+ return 2;
+ }
+ memset(data, 0, card.cardsize);
+
+ legic_print_type(card.cardsize, 0);
+
+ printf("Erasing");
+
+ // transfer to device
+ size_t len = 0;
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+ UsbCommand resp;
+ for(size_t i = 7; i < card.cardsize; i += USB_CMD_DATA_SIZE) {
+
+ printf(".");
+ len = MIN((card.cardsize - i), USB_CMD_DATA_SIZE);
+ c.arg[0] = i; // offset
+ c.arg[1] = len; // number of bytes
+ memcpy(c.d.asBytes, data+i, len);
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+ PrintAndLog("command execution time out");
+ free(data);
+ return 3;
+ }
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+ free(data);
+ return 4;
+ }
+ }
+ printf("ok\n");
+ return 0;
+}
+
int CmdLegicList(const char *Cmd) {
CmdHFList("legic");
return 0;
{"eload", CmdLegicELoad, 1, "Load binary dump to emulator memory"},
{"esave", CmdLegicESave, 1, "Save emulator memory to binary file"},
{"list", CmdLegicList, 1, "[Deprecated] List LEGIC history"},
+ {"wipe", CmdLegicWipe, 1, "Wipe a LEGIC Prime tag"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff