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chg: prng detection now takes in consideration if detection fails.

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This commit is contained in:
iceman1001 2018-02-20 21:20:17 +01:00
commit 4e915d2eb4
5 changed files with 21 additions and 14 deletions
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10
client/mifarehost.c
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@ -851,7 +851,7 @@ int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data,
* TRUE if tag uses WEAK prng (ie Now the NACK bug also needs to be present for Darkside attack)
* FALSE is tag uses HARDEND prng (ie hardnested attack possible, with known key)
*/
bool detect_classic_prng(void){
int detect_classic_prng(void){
UsbCommand resp, respA;
uint8_t cmd[] = {MIFARE_AUTH_KEYA, 0x00};
@ -865,23 +865,23 @@ bool detect_classic_prng(void){
if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
PrintAndLog("[!] PRNG UID: Reply timeout.");
return false;
return -1;
}
// if select tag failed.
if ( resp.arg[0] == 0 ) {
printf("[!] error: selecting tag failed, can't detect prng\n");
return false;
return -2;
}
if (!WaitForResponseTimeout(CMD_ACK, &respA, 2500)) {
PrintAndLog("[!] PRNG data: Reply timeout.");
return false;
return -3;
}
// check respA
if (respA.arg[0] != 4) {
PrintAndLog("[!] PRNG data error: Wrong length: %d", respA.arg[0]);
return false;
return -4;
}
uint32_t nonce = bytes_to_num(respA.d.asBytes, respA.arg[0]);