github/proxmark3
1
0
Fork 0
mirror of https://github.com/Proxmark/proxmark3.git synced 2025-08-14 02:26:59 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

Check keys in hf mf nested and hf mf chk (#414)

Browse source 
Improve hf mf chk and hf mf nested
* hf mf chk. added interrupt of procedure by usb
* extract mifare default keys into separate module
* arm side multisector `hf mf chk`
* hf mf nested. change key search procedure
* hf mf nested. added key check after we have found a key.
* small fix hf list f
* hf mf chk. add timeout (arm side) and some tweaks.
This commit is contained in:
Oleg Moiseenko 2017-10-15 22:19:34 +03:00 • committed by pwpiwi
commit 275d9e61c2
14 changed files with 375 additions and 218 deletions
Download patch file Download diff file Expand all files Collapse all files

122
armsrc/mifareutil.c
View file

@ -764,3 +764,125 @@ int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
}
return 1;
}
//-----------------------------------------------------------------------------
// MIFARE check keys
//
//-----------------------------------------------------------------------------
// one key check
int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
struct Crypto1State mpcs = {0, 0};
struct Crypto1State *pcs;
pcs = &mpcs;
// Iceman: use piwi's faster nonce collecting part in hardnested.
if (*cascade_levels == 0) { // need a full select cycle to get the uid first
iso14a_card_select_t card_info;
if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card");
return 1;
}
switch (card_info.uidlen) {
case 4 : *cascade_levels = 1; break;
case 7 : *cascade_levels = 2; break;
case 10: *cascade_levels = 3; break;
default: break;
}
} else { // no need for anticollision. We can directly select the card
if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
return 1;
}
}
if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
// SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
return 2;
} else {
/* // let it be here. it like halt command, but maybe it will work in some strange cases
uint8_t dummy_answer = 0;
ReaderTransmit(&dummy_answer, 1, NULL);
int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
// wait for the card to become ready again
while(GetCountSspClk() < timeout) {};
*/
// it needs after success authentication
mifare_classic_halt(pcs, *cuid);
}
return 0;
}
// multi key check
int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
uint8_t uid[10];
uint32_t cuid = 0;
uint8_t cascade_levels = 0;
uint64_t ui64Key = 0;
int retryCount = 0;
for (uint8_t i = 0; i < keyCount; i++) {
// Allow button press / usb cmd to interrupt device
if (BUTTON_PRESS() && !usb_poll_validate_length()) {
Dbprintf("ChkKeys: Cancel operation. Exit...");
return -2;
}
ui64Key = bytes_to_num(keys + i * 6, 6);
int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
// can't select
if (res == 1) {
retryCount++;
if (retryCount >= 5) {
Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
return -1;
}
--i; // try the same key once again
SpinDelay(20);
// Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
continue;
}
// can't authenticate
if (res == 2) {
retryCount = 0;
continue; // can't auth. wrong key.
}
return i + 1;
}
return 0;
}
// multisector multikey check
int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
int res = 0;
// int clk = GetCountSspClk();
for(int sc = 0; sc < SectorCount; sc++){
WDT_HIT();
int keyAB = keyType;
do {
res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
if (res < 0){
return res;
}
if (res > 0){
(*keyIndex)[keyAB & 0x01][sc] = res;
}
} while(--keyAB > 0);
}
// Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
return 0;
}