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cvs.zerfleddert.de Git - proxmark3-svn/blob - client/nonce2key/nonce2key.c
70d874fe88600c2a8a60014306e480b3f04a42a2
1 //-----------------------------------------------------------------------------
6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
7 // at your option, any later version. See the LICENSE.txt file for the text of
9 //-----------------------------------------------------------------------------
10 // MIFARE Darkside hack
11 //-----------------------------------------------------------------------------
13 #define __STDC_FORMAT_MACROS
17 #include "nonce2key.h"
18 #include "mifarehost.h"
21 int compar_state(const void * a
, const void * b
) {
22 // didn't work: (the result is truncated to 32 bits)
23 //return (*(int64_t*)b - *(int64_t*)a);
26 if (*(int64_t*)b
== *(int64_t*)a
) return 0;
27 else if (*(int64_t*)b
> *(int64_t*)a
) return 1;
31 int nonce2key(uint32_t uid
, uint32_t nt
, uint32_t nr
, uint64_t par_info
, uint64_t ks_info
, uint64_t * key
) {
32 struct Crypto1State
*state
;
33 uint32_t i
, pos
, rr
, nr_diff
, key_count
;//, ks1, ks2;
34 byte_t bt
, ks3x
[8], par
[8][8];
35 uint64_t key_recovered
;
37 static uint32_t last_uid
;
38 static int64_t *last_keylist
;
41 if (last_uid
!= uid
&& last_keylist
!= NULL
)
48 // Reset the last three significant bits of the reader nonce
51 PrintAndLog("\nuid(%08x) nt(%08x) par(%016"llx
") ks(%016"llx
") nr(%08"llx
")\n\n",uid
,nt
,par_info
,ks_info
,nr
);
53 for (pos
=0; pos
<8; pos
++)
55 ks3x
[7-pos
] = (ks_info
>> (pos
*8)) & 0x0f;
56 bt
= (par_info
>> (pos
*8)) & 0xff;
59 par
[7-pos
][i
] = (bt
>> i
) & 0x01;
63 printf("|diff|{nr} |ks3|ks3^5|parity |\n");
64 printf("+----+--------+---+-----+---------------+\n");
67 nr_diff
= nr
| i
<< 5;
68 printf("| %02x |%08x|",i
<< 5, nr_diff
);
69 printf(" %01x | %01x |",ks3x
[i
], ks3x
[i
]^5);
70 for (pos
=0; pos
<7; pos
++) printf("%01x,", par
[i
][pos
]);
71 printf("%01x|\n", par
[i
][7]);
75 PrintAndLog("parity is all zero,try special attack!just wait for few more seconds...");
77 state
= lfsr_common_prefix(nr
, rr
, ks3x
, par
, par_info
==0);
78 state_s
= (int64_t*)state
;
81 //sprintf(filename, "nt_%08x_%d.txt", nt, nr);
82 //printf("name %s\n", filename);
83 //FILE* fp = fopen(filename,"w");
84 for (i
= 0; (state
) && ((state
+ i
)->odd
!= -1); i
++)
86 lfsr_rollback_word(state
+i
, uid
^nt
, 0);
87 crypto1_get_lfsr(state
+ i
, &key_recovered
);
88 *(state_s
+ i
) = key_recovered
;
89 //fprintf(fp, "%012llx\n",key_recovered);
96 qsort(state_s
, i
, sizeof(*state_s
), compar_state
);
99 //Create the intersection:
101 if ( last_keylist
!= NULL
)
103 int64_t *p1
, *p2
, *p3
;
104 p1
= p3
= last_keylist
;
106 while ( *p1
!= -1 && *p2
!= -1 ) {
107 if (compar_state(p1
, p2
) == 0) {
108 printf("p1:%"llx
" p2:%"llx
" p3:%"llx
" key:%012"llx
"\n",(uint64_t)(p1
-last_keylist
),(uint64_t)(p2
-state_s
),(uint64_t)(p3
-last_keylist
),*p1
);
113 while (compar_state(p1
, p2
) == -1) ++p1
;
114 while (compar_state(p1
, p2
) == 1) ++p2
;
117 key_count
= p3
- last_keylist
;;
123 last_keylist
= state_s
;
127 printf("key_count:%d\n", key_count
);
129 // The list may still contain several key candidates. Test each of them with mfCheckKeys
130 for (i
= 0; i
< key_count
; i
++) {
133 key64
= *(last_keylist
+ i
);
134 num_to_bytes(key64
, 6, keyBlock
);
136 if (!mfCheckKeys(0, 0, false, 1, keyBlock
, &key64
)) {
148 last_keylist
= state_s
;