static int CmdHelp(const char *Cmd);
-#define SESSION_IV 0x55
#define MAX_LENGTH 1024
int usage_legic_calccrc8(void){
PrintAndLog(" h : this help");
PrintAndLog(" <offset> : offset in data array to start download from");
PrintAndLog(" <length> : number of bytes to download");
- PrintAndLog(" <IV> : (optional) Initialization vector to use");
+ PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic read");
PrintAndLog(" h : this help");
PrintAndLog(" <offset> : offset in data array to start writing from");
PrintAndLog(" <length> : number of bytes to write");
- PrintAndLog(" <IV> : (optional) Initialization vector to use");
+ PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic write");
PrintAndLog(" h : this help");
PrintAndLog(" <address> : address to write to");
PrintAndLog(" <value> : value to write");
- PrintAndLog(" <IV> : (optional) Initialization vector to use");
+ PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic writeraw");
PrintAndLog("Missing help text.");
return 0;
}
-
+int usage_legic_info(void){
+ PrintAndLog("Read info from a legic tag.");
+ PrintAndLog("Usage: hf legic info [h]");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic info");
+ return 0;
+}
/*
* Output BigBuf and deobfuscate LEGIC RF tag data.
* This is based on information given in the talk held
int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
int crc = 0, wrp = 0, wrc = 0;
uint8_t stamp_len = 0;
- uint8_t data_buf[1052]; // receiver buffer
+ uint8_t data_buf[1024]; // receiver buffer
char token_type[5] = {0,0,0,0,0};
int dcf = 0;
int bIsSegmented = 0;
- // download EML memory, where the "legic read" command puts the data.
- GetEMLFromBigBuf(data_buf, sizeof(data_buf), 0);
+ // copy data from proxmark into buffer
+ GetFromBigBuf(data_buf,sizeof(data_buf),0);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
PrintAndLog("Command execute timeout");
return 1;
int CmdLegicRFRead(const char *Cmd) {
// params:
- // offset in data
- // number of bytes.
+ // offset in data memory
+ // number of bytes to read
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read();
- uint32_t offset = 0, len = 0, IV = 0;
+ uint32_t offset = 0, len = 0, IV = 1;
sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
// OUT-OF-BOUNDS check
- if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
+ if ( len + offset > MAX_LENGTH ) {
+ len = MAX_LENGTH - offset;
+ PrintAndLog("Out-of-bound, shorten len to %d", len);
+ }
- IV &= 0x7F;
- PrintAndLog("Current IV: 0x%02x", IV);
+ if ( (IV & 0x7F) != IV ){
+ IV &= 0x7F;
+ PrintAndLog("Truncating IV to 7bits");
+ }
+
+ if ( (IV & 1) == 0 ){
+ IV |= 0x01;
+ PrintAndLog("LSB of IV must be SET");
+ }
+
+ //PrintAndLog("Using IV: 0x%02x | Offset: 0x%02x | Len: 0x%02x ", IV, offset, len);
- UsbCommand c= {CMD_READER_LEGIC_RF, {offset, len, IV}};
+ UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
clearCommandBuffer();
SendCommand(&c);
+ UsbCommand resp;
+ if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ uint16_t len = resp.arg[1] & 0x3FF;
+ if ( isOK ) {
+ PrintAndLog("use 'hf legic decode'");
+
+ uint8_t *data = resp.d.asBytes;
+ PrintAndLog("\nData |");
+ PrintAndLog("-----------------------------");
+ PrintAndLog(" %s|\n", sprint_hex(data, len));
+ } else {
+ PrintAndLog("failed reading tag");
+ }
+ } else {
+ PrintAndLog("command execution time out");
+ return 1;
+ }
return 0;
}
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_write();
- uint32_t offset = 0, len = 0, IV = SESSION_IV;
+ uint32_t offset = 0, len = 0, IV = 0;
UsbCommand c = {CMD_WRITER_LEGIC_RF, {0,0,0}};
int res = sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
// OUT-OF-BOUNDS check
if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
+ if ( (IV & 0x7F) != IV ){
+ IV &= 0x7F;
+ PrintAndLog("Truncating IV to 7bits");
+ }
+ if ( (IV & 1) == 0 ){
+ IV |= 0x01; // IV must be odd
+ PrintAndLog("LSB of IV must be SET");
+ }
- IV &= 0x7F;
PrintAndLog("Current IV: 0x%02x", IV);
c.arg[0] = offset;
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rawwrite();
- uint32_t address = 0, data = 0, IV = SESSION_IV;
+ uint32_t address = 0, data = 0, IV = 0;
char answer;
UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} };
if(address > MAX_LENGTH)
return usage_legic_rawwrite();
- IV &= 0x7F;
+ if ( (IV & 0x7F) != IV ){
+ IV &= 0x7F;
+ PrintAndLog("Truncating IV to 7bits");
+ }
+ if ( (IV & 1) == 0 ){
+ IV |= 0x01; // IV must be odd
+ PrintAndLog("LSB of IV must be SET");
+ }
PrintAndLog("Current IV: 0x%02x", IV);
c.arg[0] = address;
return 0;
}
+void static calc4(uint8_t *cmd, uint8_t len){
+ crc_t crc;
+ //crc_init_ref(&crc, 4, 0x19 >> 1, 0x5, 0, TRUE, TRUE);
+ crc_init(&crc, 4, 0x19 >> 1, 0x5, 0);
+
+ crc_clear(&crc);
+ crc_update(&crc, 1, 1); /* CMD_READ */
+ crc_update(&crc, cmd[0], 8);
+ crc_update(&crc, cmd[1], 8);
+ printf("crc4 %X\n", reflect(crc_finish(&crc), 4) ) ;
+
+ crc_clear(&crc);
+ crc_update(&crc, 1, 1); /* CMD_READ */
+ crc_update(&crc, cmd[0], 8);
+ crc_update(&crc, cmd[1], 8);
+ printf("crc4 %X\n", crc_finish(&crc) ) ;
+
+ printf("---- old ---\n");
+ crc_update2(&crc, 1, 1); /* CMD_READ */
+ crc_update2(&crc, cmd[0], 8);
+ crc_update2(&crc, cmd[1], 8);
+ printf("crc4 %X \n", reflect(crc_finish(&crc), 4) ) ;
+
+
+ crc_clear(&crc);
+ crc_update2(&crc, 1, 1); /* CMD_READ */
+ crc_update2(&crc, cmd[0], 8);
+ crc_update2(&crc, cmd[1], 8);
+ printf("crc4 %X\n", crc_finish(&crc) ) ;
+}
+
int CmdLegicCalcCrc8(const char *Cmd){
uint8_t *data = NULL;
switch (type){
case 16:
- PrintAndLog("LEGIC CRC16: %X", CRC16Legic(data, len, uidcrc));
+ PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
+ break;
+ case 4:
+ calc4(data, 0);
break;
default:
- PrintAndLog("LEGIC CRC8: %X", CRC8Legic(data, len) );
+ PrintAndLog("Legic crc8: %X", CRC8Legic(data, len) );
break;
}
return 0;
}
+int HFLegicInfo(const char *Cmd, bool verbose) {
+
+ char cmdp = param_getchar(Cmd, 0);
+ if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info();
+
+ UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}};
+ clearCommandBuffer();
+ SendCommand(&c);
+ UsbCommand resp;
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 500)) {
+ if ( verbose ) PrintAndLog("command execution time out");
+ return 1;
+ }
+
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ if ( verbose ) PrintAndLog("legic card select failed");
+ return 1;
+ }
+
+ legic_card_select_t card;
+ memcpy(&card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
+
+ PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid)));
+ switch(card.cardsize) {
+ case 22:
+ case 256:
+ case 1024:
+ PrintAndLog(" TYPE : MIM%d card (%d bytes)", card.cardsize, card.cardsize); break;
+ default: {
+ PrintAndLog("Unknown card format: %d", card.cardsize);
+ return 1;
+ }
+ }
+ return 0;
+}
+int CmdLegicInfo(const char *Cmd){
+ return HFLegicInfo(Cmd, TRUE);
+}
+
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
{"writeraw",CmdLegicRfRawWrite, 0, "<address> <value> <iv> -- Write direct to address"},
{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
{"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
+ {"info", CmdLegicInfo, 1, "Information"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff