CHG: Adding clarity to the command helptext.

[proxmark3-svn] / client / loclass / cipher.c

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index 7c9cc873a019f1ae67c9c84ba8cabd789d4e88bd..6333b4b056642831abcc682b1e2f2e8ea206fc5d 100644 (file)
--- a/client/loclass/cipher.c
+++ b/client/loclass/cipher.c
@@ -219,7 +219,7 @@ void MAC(uint8_t* k, BitstreamIn input, BitstreamOut out)
        BitstreamIn input_32_zeroes = {zeroes_32,sizeof(zeroes_32)*8,0};
        State initState = suc(k,init(k),&input);
        output(k,initState,&input_32_zeroes,&out);
        BitstreamIn input_32_zeroes = {zeroes_32,sizeof(zeroes_32)*8,0};
        State initState = suc(k,init(k),&input);
        output(k,initState,&input_32_zeroes,&out);

-}
+}       

 
 void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
 {
 
 void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
 {


@@ -229,18 +229,39 @@ void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
 
        memcpy(cc_nr,cc_nr_p,12);
     memcpy(div_key,div_key_p,8);
 
        memcpy(cc_nr,cc_nr_p,12);
     memcpy(div_key,div_key_p,8);

-
+    

        reverse_arraybytes(cc_nr,12);
        BitstreamIn bitstream = {cc_nr,12 * 8,0};
        reverse_arraybytes(cc_nr,12);
        BitstreamIn bitstream = {cc_nr,12 * 8,0};

-    uint8_t dest []= {0,0,0,0,0,0,0,0};
-    BitstreamOut out = { dest, sizeof(dest)*8, 0 };
-    MAC(div_key,bitstream, out);
-    //The output MAC must also be reversed
-    reverse_arraybytes(dest, sizeof(dest));
-    memcpy(mac, dest, 4);
+       uint8_t dest []= {0,0,0,0,0,0,0,0};
+       BitstreamOut out = { dest, sizeof(dest)*8, 0 };
+       MAC(div_key,bitstream, out);
+       //The output MAC must also be reversed
+       reverse_arraybytes(dest, sizeof(dest));
+       memcpy(mac,dest,4);

        //free(cc_nr);
     return;
 }
        //free(cc_nr);
     return;
 }

+void doMAC_N(uint8_t *address_data_p, uint8_t address_data_size, uint8_t *div_key_p, uint8_t mac[4])
+{
+       uint8_t *address_data;
+       uint8_t div_key[8];
+       address_data = (uint8_t*) malloc(address_data_size);
+
+       memcpy(address_data, address_data_p, address_data_size);
+       memcpy(div_key, div_key_p, 8);
+
+       reverse_arraybytes(address_data, address_data_size);
+       BitstreamIn bitstream = {address_data, address_data_size * 8, 0};
+       uint8_t dest []= {0,0,0,0,0,0,0,0};
+       BitstreamOut out = { dest, sizeof(dest)*8, 0 };
+       MAC(div_key, bitstream, out);
+       //The output MAC must also be reversed
+       reverse_arraybytes(dest, sizeof(dest));
+       memcpy(mac, dest, 4);
+       free(address_data);
+       return;
+}
+

 #ifndef ON_DEVICE
 int testMAC()
 {
 #ifndef ON_DEVICE
 int testMAC()
 {


@@ -264,8 +285,8 @@ int testMAC()
                prnlog("[+] FAILED: MAC calculation failed:");
                printarr("    Calculated_MAC", calculated_mac, 4);
                printarr("    Correct_MAC   ", correct_MAC, 4);
                prnlog("[+] FAILED: MAC calculation failed:");
                printarr("    Calculated_MAC", calculated_mac, 4);
                printarr("    Correct_MAC   ", correct_MAC, 4);

-               return 1;
-       }
+       return 1;
+}

 
        return 0;
 }
 
        return 0;
 }