From 3fbd7b35e2a1ab0574ec4fc209d3a261a98c563d Mon Sep 17 00:00:00 2001
From: couturie <you@example.com>
Date: Sun, 18 Feb 2018 20:23:04 +0100
Subject: [PATCH] improvement

---
 OneRoundIoT/OneRound/one_round_hash.cpp     | 97 ++++++++++++++++++++-
 OneRoundIoT/OneRound/one_round_hash_new.cpp |  4 +-
 2 files changed, 96 insertions(+), 5 deletions(-)

diff --git a/OneRoundIoT/OneRound/one_round_hash.cpp b/OneRoundIoT/OneRound/one_round_hash.cpp
index 74a08a7..44773bc 100644
--- a/OneRoundIoT/OneRound/one_round_hash.cpp
+++ b/OneRoundIoT/OneRound/one_round_hash.cpp
@@ -135,6 +135,7 @@ void prga(uchar *sc, int ldata, uchar *r) {
   }
 }
 
+inline uchar  circ(uchar x,int n) {return (x << n) | (x >> (8 - n));}
 
 void diff(uchar *Y, uchar *X, int h) { 
 
@@ -145,7 +146,7 @@ void diff(uchar *Y, uchar *X, int h) {
     Y[3] = X[0]^X[1]^X[2];
   }
   else if(h==8) {
-    Y[0] = X[0]^X[2]^X[3]^X[5]^X[6]^X[7];
+    /*Y[0] = X[0]^X[2]^X[3]^X[5]^X[6]^X[7];
     Y[1] = X[0]^X[1]^X[3]^X[4]^X[6]^X[7];
     Y[2] = X[0]^X[1]^X[2]^X[4]^X[5]^X[7];
     Y[3] = X[1]^X[2]^X[3]^X[4]^X[5]^X[6];
@@ -153,10 +154,32 @@ void diff(uchar *Y, uchar *X, int h) {
     Y[5] = X[1]^X[2]^X[4]^X[6]^X[7];
     Y[6] = X[2]^X[3]^X[4]^X[5]^X[7];
     Y[7] = X[0]^X[3]^X[4]^X[5]^X[6];
+    */
+
+
+    uchar X0=X[0];
+    uchar X1=X[1];
+    uchar X2=X[2];
+    uchar X3=X[3];
+    uchar X4=X[4];
+    uchar X5=X[5];
+    uchar X6=X[6];
+    uchar X7=X[7];
+    
+    Y[0] = X0^X2^X3^X5^X6^X7;
+    Y[1] = X0^X1^X3^X4^X6^X7;
+    Y[2] = X0^X1^X2^X4^X5^X7;
+    Y[3] = X1^X2^X3^X4^X5^X6;
+    Y[4] = X0^X1^X5^X6^X7;
+    Y[5] = X1^X2^X4^X6^X7;
+    Y[6] = X2^X3^X4^X5^X7;
+    Y[7] = X0^X3^X4^X5^X6;
+
+    
   }
   else if(h==16) {
   
-  Y[0] = X[3] ^ X[4] ^ X[6] ^ X[8] ^ X[9] ^ X[13] ^ X[14];
+    Y[0] = X[3] ^ X[4] ^ X[6] ^ X[8] ^ X[9] ^ X[13] ^ X[14];
   Y[1] = X[2] ^ X[5] ^ X[7] ^ X[8] ^ X[9] ^ X[12] ^ X[15]; 
   Y[2] = X[1] ^ X[4] ^ X[6] ^ X[10] ^ X[11] ^ X[12] ^ X[15]; 
   Y[3] = X[0] ^ X[5] ^ X[7] ^ X[10] ^ X[11] ^ X[13] ^ X[14];
@@ -171,7 +194,46 @@ void diff(uchar *Y, uchar *X, int h) {
   Y[12] = X[1] ^ X[2] ^ X[6] ^ X[7] ^ X[9] ^ X[11] ^ X[12]; 
   Y[13] = X[0] ^ X[3] ^ X[6] ^ X[7] ^ X[8] ^ X[10] ^ X[13]; 
   Y[14] = X[0] ^ X[3] ^ X[4] ^ X[5] ^ X[9] ^ X[11] ^ X[14]; 
-  Y[15] = X[1] ^ X[2] ^ X[4] ^ X[5] ^ X[8] ^ X[10] ^ X[15]; 
+  Y[15] = X[1] ^ X[2] ^ X[4] ^ X[5] ^ X[8] ^ X[10] ^ X[15];
+    
+
+/*    uchar X0=X[0];
+    uchar X1=X[1];
+    uchar X2=X[2];
+    uchar X3=X[3];
+    uchar X4=X[4];
+    uchar X5=X[5];
+    uchar X6=X[6];
+    uchar X7=X[7];
+    uchar X8=X[8];
+    uchar X9=X[9];
+    uchar X10=X[10];
+    uchar X11=X[11];
+    uchar X12=X[12];
+    uchar X13=X[13];
+    uchar X14=X[14];
+    uchar X15=X[15]; 
+
+    
+  Y[0] = X3 ^ X4 ^ X6 ^ X8 ^ X9 ^ X13 ^ X14;
+  Y[1] = X2 ^ X5 ^ X7 ^ X8 ^ X9 ^ X12 ^ X15; 
+  Y[2] = X1 ^ X4 ^ X6 ^ X10 ^ X11 ^ X12 ^ X15; 
+  Y[3] = X0 ^ X5 ^ X7 ^ X10 ^ X11 ^ X13 ^ X14;
+  Y[4] = X0 ^ X2 ^ X5 ^ X8 ^ X11 ^ X14 ^ X15; 
+  Y[5] = X1 ^ X3 ^ X4 ^ X9 ^ X10 ^ X14 ^ X15; 
+  Y[6] = X0 ^ X2 ^ X7 ^ X9 ^ X10 ^ X12 ^ X13; 
+  Y[7] = X1 ^ X3 ^ X6 ^ X8 ^ X11 ^ X12 ^ X13; 
+  Y[8] = X0 ^ X1 ^ X4 ^ X7 ^ X10 ^ X13 ^ X15; 
+  Y[9] = X0 ^ X1 ^ X5 ^ X6 ^ X11 ^ X12 ^ X14; 
+  Y[10] = X2 ^ X3 ^ X5 ^ X6 ^ X8 ^ X13 ^ X15; 
+  Y[11] = X2 ^ X3 ^ X4 ^ X7 ^ X9 ^ X12 ^ X14;
+  Y[12] = X1 ^ X2 ^ X6 ^ X7 ^ X9 ^ X11 ^ X12; 
+  Y[13] = X0 ^ X3 ^ X6 ^ X7 ^ X8 ^ X10 ^ X13; 
+  Y[14] = X0 ^ X3 ^ X4 ^ X5 ^ X9 ^ X11 ^ X14; 
+  Y[15] = X1 ^ X2 ^ X4 ^ X5 ^ X8 ^ X10 ^ X15; 
+*/
+
+  
   }
   else if(h==32) {
 
@@ -257,6 +319,13 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
     }
     
     // Second Diffusion Operation
+
+    /*for(int a=0;a<h;a+=4) {
+      fX2[a]=circ(X[a],3);
+      fX2[a+1]=circ(X[a+1],5);
+      fX2[a+2]=circ(X[a+2],1);
+      fX2[a+3]=circ(X[a+3],6);
+      }*/
     
     diff(fX2,fX,h);
     
@@ -266,7 +335,24 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
       RM1[a+1]=fX2[a+1]^RM1[PboxRM[a+1]];
       RM1[a+2]=fX2[a+2]^RM1[PboxRM[a+2]];
       RM1[a+3]=fX2[a+3]^RM1[PboxRM[a+3]];
+      }
+/*
+     for(int a=0;a<h;a+=4) {
+      RM1[a]=RM1[PboxRM[a]];
+      RM1[a+1]=RM1[PboxRM[a+1]];
+      RM1[a+2]=RM1[PboxRM[a+2]];
+      RM1[a+3]=RM1[PboxRM[a+3]];
     }
+
+     for(int a=0;a<h;a+=4) {
+      RM1[a]=fX2[a]^RM1[a];
+      RM1[a+1]=fX2[a+1]^RM1[a+1];
+      RM1[a+2]=fX2[a+2]^RM1[a+2];
+      RM1[a+3]=fX2[a+3]^RM1[a+3];
+    } 
+*/
+
+    
     
   }
 
@@ -370,7 +456,10 @@ int main(int argc, char** argv) {
     
     seq[4]++;
   }
-
+  if(change==2) {
+    
+    seq[9]++;
+  }
 
   
   
diff --git a/OneRoundIoT/OneRound/one_round_hash_new.cpp b/OneRoundIoT/OneRound/one_round_hash_new.cpp
index 59ec22d..fbb517f 100644
--- a/OneRoundIoT/OneRound/one_round_hash_new.cpp
+++ b/OneRoundIoT/OneRound/one_round_hash_new.cpp
@@ -135,7 +135,7 @@ void prga(uchar *sc, int ldata, uchar *r) {
   }
 }
 
-
+inline uchar  circ(uchar x,int n) {return (x << n) | (x >> (8 - n));}
 
 
 //the proposed hash function, which is based on DSD structure. Sensitivity is ensured by employing the binary diffusion
@@ -186,6 +186,7 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
 
     for(int a=0;a<h;a+=4) {
       Y[a]=Sbox1[Y[a]];
+      //Y[a]=circ(Y[a],3);
     }
     
     Z[h-1]=Y[h-1]^Y[0];
@@ -195,6 +196,7 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
 
     for(int a=0;a<h;a+=4) {
       Z[a]=Sbox2[Z[a]];
+      //Z[a]=circ(Z[a],7);
     }
 
     
-- 
2.39.5