+ case 1:{
+ if (algo == 1) {
+
+ uint8_t keybytes[8];
+ uint8_t RndA[8] = {0x00};
+ uint8_t RndB[8] = {0x00};
+
+ if (datain[1] == 0xff){
+ memcpy(keybytes,null_key_data8,8);
+ } else{
+ memcpy(keybytes, datain+1, datalen);
+ }
+
+ struct desfire_key defaultkey = {0};
+ desfirekey_t key = &defaultkey;
+ Desfire_des_key_new(keybytes, key);
+
+ cmd[0] = AUTHENTICATE;
+ cmd[1] = keyno; //keynumber
+ len = DesfireAPDU(cmd, 2, resp);
+ if ( !len ) {
+ if (MF_DBGLEVEL >= 1) {
+ DbpString("Authentication failed. Card timeout.");
+ }
+ OnError();
+ return;
+ }
+
+ if ( resp[2] == 0xaf ){
+ } else {
+ DbpString("Authetication failed. Invalid key number.");
+ OnError();
+ return;
+ }
+
+ memcpy( encRndB, resp+3, 8);
+
+ des_dec(&decRndB, &encRndB, key->data);
+ memcpy(RndB, decRndB, 8);
+ rol(decRndB,8);
+
+ // This should be random
+ uint8_t decRndA[8] = {0x00};
+ memcpy(RndA, decRndA, 8);
+ uint8_t encRndA[8] = {0x00};
+
+ des_dec(&encRndA, &decRndA, key->data);
+
+ memcpy(both, encRndA, 8);
+
+ for (int x = 0; x < 8; x++) {
+ decRndB[x] = decRndB[x] ^ encRndA[x];
+
+ }
+
+ 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 >= 1) {
+ DbpString("Authentication failed. Card timeout.");
+ }
+ OnError();
+ 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);
+ 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();
+ return;
+ }
+ }
+
+ //Change the selected key to a new value.
+ /*
+
+ 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);
+
+ 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();
+ cmd_send(CMD_ACK,1,0,0,skey->data,8);
+
+ } else {
+ DbpString("Authetication failed.");
+ OnError();
+ return;
+ }
+
+ }
+ }
projects / proxmark3-svn / blobdiff