+ if (algo == 2)
+ tdes_dec(&encRndA, &decRndA, key->data);
+ else if (algo == 1)
+ des_dec(&encRndA, &decRndA, key->data);
+
+ memcpy(both, encRndA, 8);
+
+ for (int x = 0; x < 8; x++) {
+ decRndB[x] = decRndB[x] ^ encRndA[x];
+
+ }
+
+ if (algo == 2)
+ tdes_dec(&encRndB, &decRndB, key->data);
+ else if (algo == 1)
+ des_dec(&encRndB, &decRndB, key->data);
+
+ memcpy(both + 8, encRndB, 8);
+
+ cmd[0] = ADDITIONAL_FRAME;
+ memcpy(cmd+1, both, 16 );
+
+ len = DesfireAPDU(cmd, 17, resp);
+ if ( !len ) {
+ if (MF_DBGLEVEL >= MF_DBG_ERROR) {
+ DbpString("Authentication failed. Card timeout.");
+ }
+ OnError(3);
+ return;
+ }
+
+ if ( resp[2] == 0x00 ){
+
+ struct desfire_key sessionKey = {0};
+ desfirekey_t skey = &sessionKey;
+ Desfire_session_key_new( RndA, RndB , key, skey );
+ //print_result("SESSION : ", skey->data, 8);
+
+ memcpy(encRndA, resp+3, 8);
+
+ if (algo == 2)
+ tdes_dec(&encRndA, &encRndA, key->data);
+ else if (algo == 1)
+ des_dec(&encRndA, &encRndA, key->data);
+
+ rol(decRndA,8);
+ for (int x = 0; x < 8; x++) {
+ if (decRndA[x] != encRndA[x]) {
+ DbpString("Authetication failed. Cannot varify PICC.");
+ OnError(4);
+ return;
+ }
+ }
+
+ //Change the selected key to a new value.
+ /*
+
+ // Current key is a 3DES key, change it to a DES key
+ if (algo == 2) {
+ cmd[0] = CHANGE_KEY;
+ cmd[1] = keyno;
+
+ uint8_t newKey[16] = {0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
+
+ uint8_t first, second;
+ uint8_t buff1[8] = {0x00};
+ uint8_t buff2[8] = {0x00};
+ uint8_t buff3[8] = {0x00};
+
+ memcpy(buff1,newKey, 8);
+ memcpy(buff2,newKey + 8, 8);
+
+ ComputeCrc14443(CRC_14443_A, newKey, 16, &first, &second);
+ memcpy(buff3, &first, 1);
+ memcpy(buff3 + 1, &second, 1);
+
+ tdes_dec(&buff1, &buff1, skey->data);
+ memcpy(cmd+2,buff1,8);
+
+ for (int x = 0; x < 8; x++) {
+ buff2[x] = buff2[x] ^ buff1[x];
+ }
+ tdes_dec(&buff2, &buff2, skey->data);
+ memcpy(cmd+10,buff2,8);
+
+ for (int x = 0; x < 8; x++) {
+ buff3[x] = buff3[x] ^ buff2[x];
+ }
+ tdes_dec(&buff3, &buff3, skey->data);
+ memcpy(cmd+18,buff3,8);
+
+ // The command always times out on the first attempt, this will retry until a response
+ // is recieved.
+ len = 0;
+ while(!len) {
+ len = DesfireAPDU(cmd,26,resp);
+ }
+
+ } else {
+ // Current key is a DES key, change it to a 3DES key
+ if (algo == 1) {
+ cmd[0] = CHANGE_KEY;
+ cmd[1] = keyno;
+
+ uint8_t newKey[16] = {0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f};
+
+ uint8_t first, second;
+ uint8_t buff1[8] = {0x00};
+ uint8_t buff2[8] = {0x00};
+ uint8_t buff3[8] = {0x00};
+
+ memcpy(buff1,newKey, 8);
+ memcpy(buff2,newKey + 8, 8);
+
+ ComputeCrc14443(CRC_14443_A, newKey, 16, &first, &second);
+ memcpy(buff3, &first, 1);
+ memcpy(buff3 + 1, &second, 1);
+
+ des_dec(&buff1, &buff1, skey->data);
+ memcpy(cmd+2,buff1,8);
+
+ for (int x = 0; x < 8; x++) {
+ buff2[x] = buff2[x] ^ buff1[x];
+ }
+ des_dec(&buff2, &buff2, skey->data);
+ memcpy(cmd+10,buff2,8);
+
+ for (int x = 0; x < 8; x++) {
+ buff3[x] = buff3[x] ^ buff2[x];
+ }
+ des_dec(&buff3, &buff3, skey->data);
+ memcpy(cmd+18,buff3,8);
+
+ // The command always times out on the first attempt, this will retry until a response
+ // is recieved.
+ len = 0;
+ while(!len) {
+ len = DesfireAPDU(cmd,26,resp);
+ }
+ }
+ }
+ */
+
+ OnSuccess();
+ if (algo == 2)
+ cmd_send(CMD_ACK,1,0,0,skey->data,16);
+ else if (algo == 1)
+ cmd_send(CMD_ACK,1,0,0,skey->data,8);
+ } else {
+ DbpString("Authetication failed.");
+ OnError(6);
+ return;
+ }
projects / proxmark3-svn / blobdiff