new hash version

[Cipher_code.git] / OneRoundIoT / OneRound / one_round_hash_new.cpp

diff --git a/OneRoundIoT/OneRound/one_round_hash_new.cpp b/OneRoundIoT/OneRound/one_round_hash_new.cpp
index 03242cde27df92ac40078621593989cab7fe88d3..0bd5788a22481663ae73bb12fd46de6a3bfcd4ac 100644 (file)
--- 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 +189,19 @@ void hash_DSD_BIN(uchar* seq_in, uchar* RM1,int len, int *PboxRM, uchar *Sbox1,
     }
   
 
-
-    
-    
-    Z[h-1]=Y[h-1]^Y[0];
-    for(int a=h-1;a>0;a--) {
-      Z[a-1]=Z[a]^Y[a];
+    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];
     }
-
     
-    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];
-      
 
-    }
+    
     
   }
 
@@ -226,7 +228,6 @@ int main(int argc, char** argv) {
   
   for(int i=1; i<argc; i++){
     if(strncmp(argv[i],"nb",2)==0)    nb_test = atoi(&(argv[i][2]));    //nb of test         
-    if(strncmp(argv[i],"ctr",3)==0) ctr = atoi(&(argv[i][3]));          //CTR ? 1  otherwise CBC like
     if(strncmp(argv[i],"h",1)==0) h = atoi(&(argv[i][1]));          //size of block
     if(strncmp(argv[i],"sizebuf",7)==0) size_buf = atoi(&(argv[i][7]));          //SIZE of the buffer
     if(strncmp(argv[i],"lena",4)==0) lena = atoi(&(argv[i][4]));          //Use Lena or buffer