check parity works
authormerlokk <olegmsn@gmail.com>
Tue, 13 Feb 2018 10:33:15 +0000 (12:33 +0200)
committermerlokk <olegmsn@gmail.com>
Tue, 13 Feb 2018 10:33:15 +0000 (12:33 +0200)
client/cmdhflist.c
client/cmdhflist.h

index a9691aa30e3683bd55e3e35c265efac8f49f752e..7059a223a38bc3fcc150ad5ebe0718f78cba865d 100644 (file)
@@ -431,29 +431,32 @@ bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize,
        
        crypto1_destroy(pcs);
        
-       if(!CheckCrc14443(CRC_14443_A, buf, cmdsize)) 
-               return false;
-       
        if (!CheckCrypto1Parity(cmd, cmdsize, buf, parity))
                return false;
 
+       if(!CheckCrc14443(CRC_14443_A, buf, cmdsize)) 
+               return false;
+       
        AuthData.ks2 = AuthData.ar_enc ^ ar;
        AuthData.ks3 = AuthData.at_enc ^ at;
 
        return true;
 }
 
-bool CheckCrypto1Parity(uint8_t *cmd, uint8_t cmdsize, uint8_t *cmd_enc, uint8_t *parity_enc) {
+bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc) {
+       uint8_t parity[16];
+       oddparitybuf(cmd, cmdsize, parity);
        printf("parity check. size=%d\n", cmdsize);
        printf("cmd    =%s\n", sprint_hex(cmd, cmdsize));
        printf("cmd_enc=%s\n", sprint_hex(cmd_enc, cmdsize));
-       printf("parity=%s\n", printBitsPar(parity_enc, cmdsize));
+       printf("parity    =%s\n", printBitsPar(parity, cmdsize));
+       printf("parity_enc=%s\n", printBitsPar(parity_enc, cmdsize));
 //     (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
+//     (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
        for (int i = 0; i < cmdsize - 1; i++) {
-               bool b = oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (6 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01);
-               printf("i=%d b=%d\n", i, b);
+               bool b = oddparity8(cmd[i]) ^ (cmd[i + 1] & 0x01) ^ ((parity_enc[i / 8] >> (7 - i % 8)) & 0x01) ^ (cmd_enc[i + 1] & 0x01);
                if (b)
-                       return false;
+                       printf("!!! i=%d \n", i);
        }
        
        return true;
index 977be288925b1afe6e18ecdcacd7f0107768d6c0..835b17e27e1b76bd69a2d116bb7f137205bf0b1a 100644 (file)
@@ -37,6 +37,6 @@ extern void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize
 extern bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, uint8_t *parity, bool isResponse, uint8_t *mfData, size_t *mfDataLen);
 extern bool NTParityChk(TAuthData *ad, uint32_t ntx);
 extern bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize, uint8_t *parity);
-extern bool CheckCrypto1Parity(uint8_t *cmd, uint8_t cmdsize, uint8_t *cmd_enc, uint8_t *parity_enc);
+extern bool CheckCrypto1Parity(uint8_t *cmd_enc, uint8_t cmdsize, uint8_t *cmd, uint8_t *parity_enc);
 
 #endif // CMDHFLIST
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