git.zerfleddert.de Git - proxmark3-svn/blob - client/mifarehost.c

   1 // Merlok, 2011
   2 // people from mifare@nethemba.com, 2010
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // High frequency ISO14443A commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include "mifarehost.h"
  15
  16
  17 int compar_int(const void * a, const void * b) {
  18         return (*(uint64_t*)b - *(uint64_t*)a);
  19 }
  20
  21 // Compare countKeys structure
  22 int compar_special_int(const void * a, const void * b) {
  23         return (((countKeys *)b)->count - ((countKeys *)a)->count);
  24 }
  25
  26 countKeys * uniqsort(uint64_t * possibleKeys, uint32_t size) {
  27         int i, j = 0;
  28         int count = 0;
  29         countKeys *our_counts;
  30
  31         qsort(possibleKeys, size, sizeof (uint64_t), compar_int);
  32
  33         our_counts = calloc(size, sizeof(countKeys));
  34         if (our_counts == NULL) {
  35                 PrintAndLog("Memory allocation error for our_counts");
  36                 return NULL;
  37         }
  38
  39         for (i = 0; i < size; i++) {
  40         if (possibleKeys[i+1] == possibleKeys[i]) {
  41                         count++;
  42                 } else {
  43                         our_counts[j].key = possibleKeys[i];
  44                         our_counts[j].count = count;
  45                         j++;
  46                         count=0;
  47                 }
  48         }
  49         qsort(our_counts, j, sizeof(countKeys), compar_special_int);
  50         return (our_counts);
  51 }
  52
  53 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKeys)
  54 {
  55         int i, m, len;
  56         uint8_t isEOF;
  57         uint32_t uid;
  58         fnVector * vector = NULL;
  59         countKeys       *ck;
  60         int lenVector = 0;
  61         UsbCommand * resp = NULL;
  62
  63         memset(resultKeys, 0x00, 16 * 6);
  64
  65         // flush queue
  66         while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ;
  67
  68   UsbCommand c = {CMD_MIFARE_NESTED, {blockNo, keyType, trgBlockNo + trgKeyType * 0x100}};
  69         memcpy(c.d.asBytes, key, 6);
  70   SendCommand(&c);
  71
  72         PrintAndLog("\n");
  73
  74         // wait cycle
  75         while (true) {
  76                 printf(".");
  77                 if (ukbhit()) {
  78                         getchar();
  79                         printf("\naborted via keyboard!\n");
  80                         break;
  81                 }
  82
  83                 resp = WaitForResponseTimeout(CMD_ACK, 1500);
  84
  85                 if (resp != NULL) {
  86                         isEOF  = resp->arg[0] & 0xff;
  87
  88                         if (isEOF) break;
  89
  90                         len = resp->arg[1] & 0xff;
  91                         if (len == 0) continue;
  92
  93                         memcpy(&uid, resp->d.asBytes, 4);
  94                         PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, resp->arg[2] & 0xff, (resp->arg[2] >> 8) & 0xff);
  95                         vector = (fnVector *) realloc((void *)vector, (lenVector + len) * sizeof(fnVector) + 200);
  96                         if (vector == NULL) {
  97                                 PrintAndLog("Memory allocation error for fnVector. len: %d bytes: %d", lenVector + len, (lenVector + len) * sizeof(fnVector));
  98                                 break;
  99                         }
 100
 101                         for (i = 0; i < len; i++) {
 102                                 vector[lenVector + i].blockNo = resp->arg[2] & 0xff;
 103                                 vector[lenVector + i].keyType = (resp->arg[2] >> 8) & 0xff;
 104                                 vector[lenVector + i].uid = uid;
 105
 106                                 memcpy(&vector[lenVector + i].nt,  (void *)(resp->d.asBytes + 8 + i * 8 + 0), 4);
 107                                 memcpy(&vector[lenVector + i].ks1, (void *)(resp->d.asBytes + 8 + i * 8 + 4), 4);
 108                         }
 109
 110                         lenVector += len;
 111                 }
 112         }
 113
 114         if (!lenVector) {
 115                 PrintAndLog("Got 0 keys from proxmark.");
 116                 return 1;
 117         }
 118         printf("------------------------------------------------------------------\n");
 119
 120         // calc keys
 121         struct Crypto1State* revstate = NULL;
 122         struct Crypto1State* revstate_start = NULL;
 123         uint64_t lfsr;
 124         int kcount = 0;
 125         pKeys           *pk;
 126
 127         if ((pk = (void *) malloc(sizeof(pKeys))) == NULL) return 1;
 128         memset(pk, 0x00, sizeof(pKeys));
 129
 130         for (m = 0; m < lenVector; m++) {
 131                 // And finally recover the first 32 bits of the key
 132                 revstate = lfsr_recovery32(vector[m].ks1, vector[m].nt ^ vector[m].uid);
 133                 if (revstate_start == NULL) revstate_start = revstate;
 134
 135                 while ((revstate->odd != 0x0) || (revstate->even != 0x0)) {
 136                         lfsr_rollback_word(revstate, vector[m].nt ^ vector[m].uid, 0);
 137                         crypto1_get_lfsr(revstate, &lfsr);
 138
 139                         // Allocate a new space for keys
 140                         if (((kcount % MEM_CHUNK) == 0) || (kcount >= pk->size)) {
 141                                 pk->size += MEM_CHUNK;
 142 //fprintf(stdout, "New chunk by %d, sizeof %d\n", kcount, pk->size * sizeof(uint64_t));
 143                                 pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t));
 144                                 if (pk->possibleKeys == NULL) {
 145                                         PrintAndLog("Memory allocation error for pk->possibleKeys");
 146                                         return 1;
 147                                 }
 148                         }
 149                         pk->possibleKeys[kcount] = lfsr;
 150                         kcount++;
 151                         revstate++;
 152                 }
 153         free(revstate_start);
 154         revstate_start = NULL;
 155
 156         }
 157
 158         // Truncate
 159         if (kcount != 0) {
 160                 pk->size = --kcount;
 161                 if ((pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t))) == NULL) {
 162                         PrintAndLog("Memory allocation error for pk->possibleKeys");
 163                         return 1;
 164                 }
 165         }
 166
 167         PrintAndLog("Total keys count:%d", kcount);
 168         ck = uniqsort(pk->possibleKeys, pk->size);
 169
 170         // fill key array
 171         for (i = 0; i < 16 ; i++) {
 172                 num_to_bytes(ck[i].key, 6, (uint8_t*)(resultKeys + i * 6));
 173         }
 174
 175         // finalize
 176         free(pk->possibleKeys);
 177         free(pk);
 178         free(ck);
 179         free(vector);
 180
 181         return 0;
 182 }
 183
 184 int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){
 185         *key = 0;
 186
 187   UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};
 188         memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
 189
 190   SendCommand(&c);
 191
 192         UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 3000);
 193
 194         if (resp == NULL) return 1;
 195         if ((resp->arg[0] & 0xff) != 0x01) return 2;
 196         *key = bytes_to_num(resp->d.asBytes, 6);
 197         return 0;
 198 }
 199
 200 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 201   UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};
 202
 203   SendCommand(&c);
 204
 205         UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
 206
 207         if (resp == NULL) return 1;
 208         memcpy(data, resp->d.asBytes, blocksCount * 16);
 209         return 0;
 210 }
 211
 212 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
 213   UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
 214         memcpy(c.d.asBytes, data, blocksCount * 16);
 215   SendCommand(&c);
 216         return 0;
 217 }
 218
 219 int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {
 220         uint8_t isOK = 0;
 221         uint8_t block0[16];
 222         memset(block0, 0, 16);
 223         memcpy(block0, uid, 4);
 224         block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC
 225
 226   UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, 1, 0}};
 227         memcpy(c.d.asBytes, block0, 16);
 228   SendCommand(&c);
 229
 230         UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
 231
 232         if (resp != NULL) {
 233                 isOK  = resp->arg[0] & 0xff;
 234                 PrintAndLog("isOk:%02x", isOK);
 235                 memcpy(oldUID, resp->d.asBytes, 4);
 236                 if (!isOK) return 2;
 237         } else {
 238                 PrintAndLog("Command execute timeout");
 239                 return 1;
 240         }
 241         return 0;
 242 }