From: couturie <you@example.com>
Date: Tue, 17 Apr 2018 05:36:10 +0000 (+0200)
Subject: code improvement
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/Cipher_code.git/commitdiff_plain/18a162a51aa2e5a34b4a341c9747ae61e5f4ec4a

code improvement
---

diff --git a/OneRoundIoT/OneRound/one_round_hash_new.cpp b/OneRoundIoT/OneRound/one_round_hash_new.cpp
index 03242cd..84e1ee6 100644
--- a/OneRoundIoT/OneRound/one_round_hash_new.cpp
+++ b/OneRoundIoT/OneRound/one_round_hash_new.cpp
@@ -171,8 +171,14 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
 
 
     Y[0]=X[0]^X[h-1];
-    for(int a=1;a<h;a++) {
+    Y[1]=Y[0]^X[0];
+    Y[2]=Y[1]^X[1];
+    Y[3]=Y[2]^X[2];
+    for(int a=4;a<h;a+=4) {
       Y[a]=Y[a-1]^X[a-1];
+      Y[a+1]=Y[a]^X[a];
+      Y[a+2]=Y[a+1]^X[a+1];
+      Y[a+3]=Y[a+2]^X[a+2];
     }
 
     for(int a=0;a<h;a+=4) {
@@ -183,23 +189,47 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
     }
   
 
+    RM1[h-1]=Y[h-1]^Y[0];
+    RM1[h-2]=RM1[h-1]^Y[h-1];
+    RM1[h-3]=RM1[h-2]^Y[h-2];
+    RM1[h-4]=RM1[h-3]^Y[h-3];
+    for(int a=h-4;a>0;a-=4) {
+      RM1[a-1]=RM1[a]^Y[a];
+      RM1[a-2]=RM1[a-1]^Y[a-1];
+      RM1[a-3]=RM1[a-2]^Y[a-2];
+      RM1[a-4]=RM1[a-3]^Y[a-3];
+    }
+    
 
     
+    // Z[h-1]=Y[h-1]^Y[0];
+    // Z[h-2]=Z[h-1]^Y[h-1];
+    // for(int a=h-2;a>0;a-=2) {
+    //   Z[a-1]=Z[a]^Y[a];
+    //   Z[a-2]=Z[a-1]^Y[a-1];
+    // }
     
-    Z[h-1]=Y[h-1]^Y[0];
-    for(int a=h-1;a>0;a--) {
-      Z[a-1]=Z[a]^Y[a];
-    }
-
+    // /*
+    // Z[h-1]=Y[h-1]^Y[0];
+    // Z[h-2]=Z[h-1]^Y[h-1];
+    // Z[h-3]=Z[h-2]^Y[h-2];
+    // Z[h-4]=Z[h-3]^Y[h-3];
+    // for(int a=h-4;a>0;a-=4) {
+    //   Z[a-1]=Z[a]^Y[a];
+    //   Z[a]=Z[a+1]^Y[a+1];
+    //   Z[a+1]=Z[a+2]^Y[a+2];
+    //   Z[a+2]=Z[a+3]^Y[a+3];
+    // }
+    // */
     
-    for(int a=0;a<h;a+=4) {
-      RM1[a]=Z[a];
-      RM1[a+1]=Z[a+1];
-      RM1[a+2]=Z[a+2];
-      RM1[a+3]=Z[a+3];
+    // for(int a=0;a<h;a+=4) {
+    //   RM1[a]=Z[a];
+    //   RM1[a+1]=Z[a+1];
+    //   RM1[a+2]=Z[a+2];
+    //   RM1[a+3]=Z[a+3];
       
 
-    }
+    // }
     
   }