Merge pull request #884 from pwpiwi/fix_iclass_snoop

[proxmark3-svn] / armsrc / optimized_cipher.h

diff --git a/armsrc/optimized_cipher.h b/armsrc/optimized_cipher.h
index 6a4e2641b8b3694143828e37f40938b6cc6489f1..be77a25011794a98a70dd8a50555c7f2dd89230a 100644 (file)
--- a/armsrc/optimized_cipher.h
+++ b/armsrc/optimized_cipher.h
@@ -35,17 +35,18 @@
  *
  ****************************************************************************/
 
- #ifndef OPTIMIZED_CIPHER_H
-#define OPTIMIZED_CIPHER_H
+#ifndef OPTIMIZED_CIPHER_H__
+#define OPTIMIZED_CIPHER_H__
+
 #include <stdint.h>
 
 /**
 * Definition 1 (Cipher state). A cipher state of iClass s is an element of F 40/2
 * consisting of the following four components:
-*      1. the left register l = (l 0 . . . l 7 ) ∈ F 8/2 ;
-*      2. the right register r = (r 0 . . . r 7 ) ∈ F 8/2 ;
-*      3. the top register t = (t 0 . . . t 15 ) ∈ F 16/2 .
-*      4. the bottom register b = (b 0 . . . b 7 ) ∈ F 8/2 .
+*   1. the left register l = (l 0 . . . l 7 ) ∈ F 8/2 ;
+*   2. the right register r = (r 0 . . . r 7 ) ∈ F 8/2 ;
+*   3. the top register t = (t 0 . . . t 15 ) ∈ F 16/2 .
+*   4. the bottom register b = (b 0 . . . b 7 ) ∈ F 8/2 .
 **/
 typedef struct {
        uint8_t l;
@@ -57,6 +58,7 @@ typedef struct {
 /** The reader MAC is MAC(key, CC * NR )
  **/
 void opt_doReaderMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4]);
+
 /**
  * The tag MAC is MAC(key, CC * NR * 32x0))
  */
@@ -71,6 +73,7 @@ void opt_doTagMAC(uint8_t *cc_p, const uint8_t *div_key_p, uint8_t mac[4]);
  * @return the cipher state
  */
 State opt_doTagMAC_1(uint8_t *cc_p, const uint8_t *div_key_p);
+
 /**
  * The second part of the tag MAC calculation, since the CC is already calculated into the state,
  * this function is fed only the NR, and internally feeds the remaining 32 0-bits to generate the tag
@@ -80,6 +83,6 @@ State opt_doTagMAC_1(uint8_t *cc_p, const uint8_t *div_key_p);
  * @param mac - where to store the MAC
  * @param div_key_p - the key to use
  */
-void opt_doTagMAC_2(State _init, uint8_t* nr, uint8_t mac[4], const uint8_t* div_key_p);
+void opt_doTagMAC_2(State _init, uint8_t *nr, uint8_t mac[4], const uint8_t *div_key_p);
 
-#endif // OPTIMIZED_CIPHER_H
+#endif // OPTIMIZED_CIPHER_H__