lilliput-ae-reference-implementation

commit 8a8950699eb8bb9cd29311d32d003431a4472ae4
parent 156b597dbe5900635fd629fd95783917b7c964d8
Author: Kévin Le Gouguec <kevin.legouguec@airbus.com>
Date:   Mon,  3 Dec 2018 10:28:12 +0100

Nettoyage du code du key schedule

Diffstat:
M
src/tweakey.c
 | 
12
++++--------

1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/src/tweakey.c b/src/tweakey.c
@@ -47,8 +47,6 @@ static void _permute_state(tweakey_state *TK)
     uint8_t TK_old[TWEAKEY_BYTES];
     memcpy(TK_old, TK->TK, sizeof(TK_old));
 
-    /* TODO: homogenize indices; here j=lane; k=byte */
-
     for (size_t j=0; j<TWEAKEY_BYTES; j+=LANE_BYTES)
     {
         for (size_t k=0; k<LANE_BYTES; k++)
@@ -62,15 +60,13 @@ static void _multiply_state(tweakey_state *TK)
 {
     /* Lane 0 is multiplied by Id; lane 1 by P_0, lane 2 by P_1... */
 
-    for (size_t lane=1; lane<LANES_NB; lane++)
+    for (size_t j=1; j<LANES_NB; j++)
     {
-        const uint8_t* P_lane = P[lane-1];
-
-        /* TODO: homogenize indices; here b=byte */
+        const uint8_t *P_lane = P[j-1];
 
-        for (size_t b=0; b<LANE_BYTES; b++)
+        for (size_t k=0; k<LANE_BYTES; k++)
         {
-            size_t offset = lane*LANE_BYTES + b;
+            size_t offset = j*LANE_BYTES + k;
             TK->TK[offset] = P_lane[TK->TK[offset]];
         }
     }