RfidResearchGroup/proxmark3
1
1
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-03-20 20:18:17 +08:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request #1805 from jmichelp/master

Browse source 
Modified logic to also try key B on MF cards.
This commit is contained in:
Iceman 2022-11-02 14:25:14 +01:00 • committed by GitHub
commit 835a028420
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
client/src/cmdhfmf.c
View file

@ -842,14 +842,17 @@ static int CmdHF14AMfDump(const char *Cmd) {
uint8_t tries;
mf_readblock_t payload;
uint8_t current_key;
for (sectorNo = 0; sectorNo < numSectors; sectorNo++) {
current_key = MF_KEY_A;
for (tries = 0; tries < MIFARE_SECTOR_RETRY; tries++) {
PrintAndLogEx(NORMAL, "." NOLF);
fflush(stdout);
payload.blockno = mfFirstBlockOfSector(sectorNo) + mfNumBlocksPerSector(sectorNo) - 1;
payload.keytype = MF_KEY_A;
memcpy(payload.key, keyA[sectorNo], sizeof(payload.key));
payload.keytype = current_key;
memcpy(payload.key, current_key == MF_KEY_A ? keyA[sectorNo] : keyB[sectorNo], sizeof(payload.key));
clearCommandBuffer();
SendCommandNG(CMD_HF_MIFARE_READBL, (uint8_t *)&payload, sizeof(mf_readblock_t));
@ -863,7 +866,10 @@ static int CmdHF14AMfDump(const char *Cmd) {
rights[sectorNo][2] = ((data[7] & 0x40) >> 4) | ((data[8] & 0x4) >> 1) | ((data[8] & 0x40) >> 6); // C1C2C3 for data area 2
rights[sectorNo][3] = ((data[7] & 0x80) >> 5) | ((data[8] & 0x8) >> 2) | ((data[8] & 0x80) >> 7); // C1C2C3 for sector trailer
break;
} else if (tries == 2) { // on last try set defaults
} else if (tries == (MIFARE_SECTOR_RETRY / 2)) { // after half unsuccessful tries, give key B a go
PrintAndLogEx(FAILED, "\ntrying with key B instead...", sectorNo);
current_key = MF_KEY_B;
} else if (tries == (MIFARE_SECTOR_RETRY - 1)) { // on last try set defaults
PrintAndLogEx(FAILED, "\ncould not get access rights for sector %2d. Trying with defaults...", sectorNo);
rights[sectorNo][0] = rights[sectorNo][1] = rights[sectorNo][2] = 0x00;
rights[sectorNo][3] = 0x01;
@ -882,13 +888,13 @@ static int CmdHF14AMfDump(const char *Cmd) {
for (sectorNo = 0; sectorNo < numSectors; sectorNo++) {
for (blockNo = 0; blockNo < mfNumBlocksPerSector(sectorNo); blockNo++) {
bool received = false;
current_key = MF_KEY_A;
for (tries = 0; tries < MIFARE_SECTOR_RETRY; tries++) {
if (blockNo == mfNumBlocksPerSector(sectorNo) - 1) { // sector trailer. At least the Access Conditions can always be read with key A.
payload.blockno = mfFirstBlockOfSector(sectorNo) + blockNo;
payload.keytype = MF_KEY_A;
memcpy(payload.key, keyA[sectorNo], sizeof(payload.key));
payload.keytype = current_key;
memcpy(payload.key, current_key == MF_KEY_A ? keyA[sectorNo] : keyB[sectorNo], sizeof(payload.key));
clearCommandBuffer();
SendCommandNG(CMD_HF_MIFARE_READBL, (uint8_t *)&payload, sizeof(mf_readblock_t));
@ -898,7 +904,7 @@ static int CmdHF14AMfDump(const char *Cmd) {
if ((rights[sectorNo][data_area] == 0x03) || (rights[sectorNo][data_area] == 0x05)) { // only key B would work
payload.blockno = mfFirstBlockOfSector(sectorNo) + blockNo;
payload.keytype = 1;
payload.keytype = MF_KEY_B;
memcpy(payload.key, keyB[sectorNo], sizeof(payload.key));
clearCommandBuffer();
@ -911,8 +917,8 @@ static int CmdHF14AMfDump(const char *Cmd) {
} else { // key A would work
payload.blockno = mfFirstBlockOfSector(sectorNo) + blockNo;
payload.keytype = MF_KEY_A;
memcpy(payload.key, keyA[sectorNo], sizeof(payload.key));
payload.keytype = current_key;
memcpy(payload.key, current_key == MF_KEY_A ? keyA[sectorNo] : keyB[sectorNo], sizeof(payload.key));
clearCommandBuffer();
SendCommandNG(CMD_HF_MIFARE_READBL, (uint8_t *)&payload, sizeof(mf_readblock_t));
@ -924,6 +930,10 @@ static int CmdHF14AMfDump(const char *Cmd) {
// break the re-try loop
break;
}
if ((current_key == MF_KEY_A) && (tries == (MIFARE_SECTOR_RETRY / 2))) {
// Half the tries failed with key A. Swap for key B
current_key = MF_KEY_B;
}
}
}