-//-----------------------------------------------------------------------------
-// Merlok - June 2011
-// Roel - Dec 2009
-// Unknown author
-//
-// This code is licensed to you under the terms of the GNU GPL, version 2 or,
-// at your option, any later version. See the LICENSE.txt file for the text of
-// the license.
-//-----------------------------------------------------------------------------
-// MIFARE Darkside hack
-//-----------------------------------------------------------------------------
-
-#include "nonce2key.h"
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "mifarehost.h"
-#include "util.h"
-#include "crapto1/crapto1.h"
-
-// recover key from 2 different reader responses on same tag challenge
-bool mfkey32(nonces_t data, uint64_t *outputkey) {
- struct Crypto1State *s,*t;
- uint64_t outkey = 0;
- uint64_t key = 0; // recovered key
- bool isSuccess = false;
- uint8_t counter = 0;
-
- uint64_t t1 = msclock();
-
- s = lfsr_recovery32(data.ar ^ prng_successor(data.nonce, 64), 0);
-
- for(t = s; t->odd | t->even; ++t) {
- lfsr_rollback_word(t, 0, 0);
- lfsr_rollback_word(t, data.nr, 1);
- lfsr_rollback_word(t, data.cuid ^ data.nonce, 0);
- crypto1_get_lfsr(t, &key);
- crypto1_word(t, data.cuid ^ data.nonce, 0);
- crypto1_word(t, data.nr2, 1);
- if (data.ar2 == (crypto1_word(t, 0, 0) ^ prng_successor(data.nonce, 64))) {
- //PrintAndLog("Found Key: [%012" PRIx64 "]",key);
- outkey = key;
- counter++;
- if (counter == 20) break;
- }
- }
- isSuccess = (counter == 1);
- t1 = msclock() - t1;
- //if ( t1 > 0 ) PrintAndLog("Time in mfkey32: %.1f seconds \nFound %d possible keys", (float)t1/1000.0, counter);
- *outputkey = ( isSuccess ) ? outkey : 0;
- crypto1_destroy(s);
- /* //un-comment to save all keys to a stats.txt file
- FILE *fout;
- if ((fout = fopen("stats.txt","ab")) == NULL) {
- PrintAndLog("Could not create file name stats.txt");
- return 1;
- }
- fprintf(fout, "mfkey32,%d,%08x,%d,%s,%04x%08x,%.0Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t)(outkey>>32) & 0xFFFF,(uint32_t)(outkey&0xFFFFFFFF),(long double)t1);
- fclose(fout);
- */
- return isSuccess;
-}
-
-// recover key from 2 reader responses on 2 different tag challenges
-bool mfkey32_moebius(nonces_t data, uint64_t *outputkey) {
- struct Crypto1State *s, *t;
- uint64_t outkey = 0;
- uint64_t key = 0; // recovered key
- bool isSuccess = false;
- int counter = 0;
-
- //PrintAndLog("Enter mfkey32_moebius");
- uint64_t t1 = msclock();
-
- s = lfsr_recovery32(data.ar ^ prng_successor(data.nonce, 64), 0);
-
- for(t = s; t->odd | t->even; ++t) {
- lfsr_rollback_word(t, 0, 0);
- lfsr_rollback_word(t, data.nr, 1);
- lfsr_rollback_word(t, data.cuid ^ data.nonce, 0);
- crypto1_get_lfsr(t, &key);
-
- crypto1_word(t, data.cuid ^ data.nonce2, 0);
- crypto1_word(t, data.nr2, 1);
- if (data.ar2 == (crypto1_word(t, 0, 0) ^ prng_successor(data.nonce2, 64))) {
- //PrintAndLog("Found Key: [%012" PRIx64 "]",key);
- outkey=key;
- ++counter;
- if (counter==20)
- break;
- }
- }
- isSuccess = (counter == 1);
- t1 = msclock() - t1;
- // PrintAndLog("Time in mfkey32_moebius: %.1f seconds \nFound %d possible keys", (float)t1/1000.0, counter);
- *outputkey = ( isSuccess ) ? outkey : 0;
- crypto1_destroy(s);
- /* // un-comment to output all keys to stats.txt
- FILE *fout;
- if ((fout = fopen("stats.txt","ab")) == NULL) {
- PrintAndLog("Could not create file name stats.txt");
- return 1;
- }
- fprintf(fout, "moebius,%d,%08x,%d,%s,%04x%08x,%0.Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t) (outkey>>32),(uint32_t)(outkey&0xFFFFFFFF),(long double)t1);
- fclose(fout);
- */
- return isSuccess;
-}
-
-// recover key from reader response and tag response of one authentication sequence
-int mfkey64(nonces_t data, uint64_t *outputkey){
- uint64_t key = 0; // recovered key
- uint32_t ks2; // keystream used to encrypt reader response
- uint32_t ks3; // keystream used to encrypt tag response
- struct Crypto1State *revstate;
-
- // PrintAndLog("Enter mfkey64");
- uint64_t t1 = msclock();
-
- // Extract the keystream from the messages
- ks2 = data.ar ^ prng_successor(data.nonce, 64);
- ks3 = data.at ^ prng_successor(data.nonce, 96);
- revstate = lfsr_recovery64(ks2, ks3);
- lfsr_rollback_word(revstate, 0, 0);
- lfsr_rollback_word(revstate, 0, 0);
- lfsr_rollback_word(revstate, data.nr, 1);
- lfsr_rollback_word(revstate, data.cuid ^ data.nonce, 0);
- crypto1_get_lfsr(revstate, &key);
- // PrintAndLog("Found Key: [%012" PRIx64 "]", key);
- crypto1_destroy(revstate);
- *outputkey = key;
-
- t1 = msclock() - t1;
- // PrintAndLog("Time in mfkey64: %.1f seconds \n", (float)t1/1000.0);
- return 0;
-}
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