+ uint8_t resp[19] = {0x00};\r
+ uint8_t respPar[3] = {0,0,0};\r
+\r
+ // REQUEST AUTHENTICATION\r
+ len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);\r
+ if (len != 11) {\r
+ if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);\r
+ OnError(1);\r
+ return 1;\r
+ }\r
+\r
+ // tag nonce.\r
+ memcpy(enc_random_b,resp+1,8);\r
+\r
+ // decrypt nonce.\r
+ tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );\r
+ rol(random_b,8);\r
+ memcpy(rnd_ab ,random_a,8);\r
+ memcpy(rnd_ab+8,random_b,8);\r
+ \r
+ if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {\r
+ Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",\r
+ enc_random_b[0],enc_random_b[1],enc_random_b[2],enc_random_b[3],enc_random_b[4],enc_random_b[5],enc_random_b[6],enc_random_b[7]);\r
+ \r
+ Dbprintf(" B: %02x %02x %02x %02x %02x %02x %02x %02x",\r
+ random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);\r
+\r
+ Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",\r
+ rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);\r
+ \r
+ Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",\r
+ rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );\r
+ }\r