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fix MFP check with defines and easier logic

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This commit is contained in:
iceman1001 2023-04-15 20:44:52 +02:00
commit 1bb78e02a4
2 changed files with 11 additions and 8 deletions
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13
client/src/cmdhfmfp.c
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@ -1023,8 +1023,8 @@ static int MFPKeyCheck(uint8_t startSector, uint8_t endSector, uint8_t startKeyA
keyn[1] = uKeyNum & 0xff;
for (int retry = 0; retry < 4; retry++) {
res = MifareAuth4(NULL, keyn, keyList[i], selectCard, true, false, false, true);
if (res != 2)
res = MifareAuth4(NULL, keyn, keyList[i], selectCard, true, false, false, true);
if (res == PM3_SUCCESS || PM3_EWRONGANSWER)
break;
if (verbose)
@ -1041,7 +1041,7 @@ static int MFPKeyCheck(uint8_t startSector, uint8_t endSector, uint8_t startKeyA
PrintAndLogEx(WARNING, "\nsector %02d key %d [%s] res: %d", sector, keyAB, sprint_hex_inrow(keyList[i], 16), res);
// key for [sector,keyAB] found
if (res == 0) {
if (res == PM3_SUCCESS) {
if (verbose)
PrintAndLogEx(INFO, "\nFound key for sector %d key %s [%s]", sector, keyAB == 0 ? "A" : "B", sprint_hex_inrow(keyList[i], 16));
else
@ -1055,9 +1055,10 @@ static int MFPKeyCheck(uint8_t startSector, uint8_t endSector, uint8_t startKeyA
break;
}
// 5 - auth error (rnd not equal)
// PM3 client says that RND not equal is -16. Corrected. Seems to work.
if (res != -16) {
// RES can be:
// PM3_ERFTRANS -7
// PM3_EWRONGANSWER -16
if (res == PM3_ERFTRANS) {
if (verbose)
PrintAndLogEx(ERR, "\nExchange error. Aborted.");
else

6
client/src/mifare/mifare4.c
View file

@ -289,8 +289,9 @@ int MifareAuth4(mf4Session_t *mf4session, uint8_t *keyn, uint8_t *key, bool acti
uint8_t kenc[16] = {0};
memcpy(&kenc[0], &RndA[11], 5);
memcpy(&kenc[5], &RndB[11], 5);
for (int i = 0; i < 5; i++)
for (int i = 0; i < 5; i++) {
kenc[10 + i] = RndA[4 + i] ^ RndB[4 + i];
}
kenc[15] = 0x11;
aes_encode(NULL, key, kenc, kenc, 16);
@ -301,8 +302,9 @@ int MifareAuth4(mf4Session_t *mf4session, uint8_t *keyn, uint8_t *key, bool acti
uint8_t kmac[16] = {0};
memcpy(&kmac[0], &RndA[7], 5);
memcpy(&kmac[5], &RndB[7], 5);
for (int i = 0; i < 5; i++)
for (int i = 0; i < 5; i++) {
kmac[10 + i] = RndA[0 + i] ^ RndB[0 + i];
}
kmac[15] = 0x22;
aes_encode(NULL, key, kmac, kmac, 16);