+ \r
+ // authenticate here.\r
+ if ( usePwd ) {\r
+\r
+ uint8_t a[8] = { 0x01 };\r
+ uint8_t b[8] = { 0x00 };\r
+ uint8_t enc_b[8] = { 0x00 };\r
+ uint8_t ab[16] = { 0x00 };\r
+ \r
+ uint8_t transKey[8] = { 0x00 };\r
+ \r
+ uint16_t len;\r
+ uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];\r
+ uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];\r
+ \r
+ len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, receivedAnswer,receivedAnswerPar ,NULL);\r
+ if (len == 1) {\r
+ if (MF_DBGLEVEL >= MF_DBG_ERROR)\r
+ Dbprintf("Cmd Error: %02x", receivedAnswer[0]);\r
+ OnError(1);\r
+ return;\r
+ }\r
+ \r
+// memcpy(dataout, receivedAnswer, 11);\r
+ \r
+ // tag nonce.\r
+ memcpy(enc_b,receivedAnswer+1,8);\r
+\r
+ // decrypt nonce.\r
+ des_dec(enc_b, b, key );\r
+\r
+ Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x", enc_b[0],enc_b[1],enc_b[2],enc_b[3],enc_b[4],enc_b[5],enc_b[6],enc_b[7] );\r
+\r
+ rol(b,8);\r
+ \r
+ memcpy(ab ,a,8);\r
+ memcpy(ab+8,b,8);\r
+\r
+ Dbprintf("AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[0],ab[1],ab[2],ab[3],ab[4],ab[5],ab[6],ab[7] );\r
+ Dbprintf("AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[8],ab[9],ab[10],ab[11],ab[12],ab[13],ab[14],ab[15] );\r
+\r
+ // encrypt\r
+ des_enc(ab, ab, key);\r
+\r
+ Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[0],ab[1],ab[2],ab[3],ab[4],ab[5],ab[6],ab[7] );\r
+ Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", ab[8],ab[9],ab[10],ab[11],ab[12],ab[13],ab[14],ab[15] );\r
+\r
+ len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, ab, receivedAnswer, receivedAnswerPar, NULL);\r
+ if (len == 1) {\r
+ if (MF_DBGLEVEL >= MF_DBG_ERROR)\r
+ Dbprintf("Cmd Error: %02x", receivedAnswer[0]);\r
+ OnError(1);\r
+ return;\r
+ }\r
+ \r
+ // \r
+ memcpy(transKey, receivedAnswer+1, 8);\r
+ Dbprintf("TRANSACTIONKEY: %02x %02x %02x %02x %02x %02x %02x %02x", transKey[0],transKey[1],transKey[2],transKey[3],\r
+ transKey[4],transKey[5],transKey[6],transKey[7] );\r
+ }\r
+ \r