X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/92d255d3dc8fb9e567f3db035918249e6d083c35..d3a22c7dfa87bf5e21d228849a602194be4a0895:/client/loclass/cipher.c

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index 463ba9be..1c9dae8b 100644
--- a/client/loclass/cipher.c
+++ b/client/loclass/cipher.c
@@ -1,5 +1,17 @@
 /*****************************************************************************
- * This file is part of iClassCipher. It is a reconstructon of the cipher engine
+ * WARNING
+ *
+ * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY. 
+ * 
+ * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL 
+ * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL, 
+ * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES. 
+ * 
+ * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS. 
+ *
+ *****************************************************************************
+ *
+ * This file is part of loclass. It is a reconstructon of the cipher engine
  * used in iClass, and RFID techology.
  *
  * The implementation is based on the work performed by
@@ -203,7 +215,7 @@ 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);
-}
+}	 
 
 void doMAC(uint8_t *cc_nr_p, int length, uint8_t *div_key_p, uint8_t mac[4])
 {
@@ -212,17 +224,17 @@ void doMAC(uint8_t *cc_nr_p, int length, uint8_t *div_key_p, uint8_t mac[4])
     cc_nr=(uint8_t*)malloc(length+1);
     memcpy(cc_nr,cc_nr_p,length);
     memcpy(div_key,div_key_p,8);
-
-    reverse_arraybytes(cc_nr,length);
-    BitstreamIn bitstream = {cc_nr,length * 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);
+    
+	reverse_arraybytes(cc_nr,length);
+	BitstreamIn bitstream = {cc_nr,length * 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);
     //printf("Calculated_MAC\t%02x%02x%02x%02x\n", dest[0],dest[1],dest[2],dest[3]);
-    free(cc_nr);
+	free(cc_nr);
     return;
 }
 
@@ -248,8 +260,8 @@ int testMAC()
 		prnlog("[+] FAILED: MAC calculation failed:");
 		printarr("    Calculated_MAC", calculated_mac, 4);
 		printarr("    Correct_MAC   ", correct_MAC, 4);
-		return 1;
-	}
+	return 1;
+}
 
 	return 0;
 }