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edit xor and xor tests

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Lucàs
2022-10-26 17:52:14 +02:00
parent 7d91d4bc01
commit 08b83ec675
2 changed files with 68 additions and 46 deletions
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src/cryptography/Des.java
+27 -27
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@@ -186,7 +186,7 @@ public class Des {
public static int[] xor(int[] tab1, int[] tab2) {
int[] resultat = new int[tab1.length];
for (int i = 0; i < resultat.length; i++) {
resultat[i] = (tab1[i] + tab2[i]) % 2;
resultat[i] = tab1[i] ^ tab2[i];
}
return resultat;
@@ -278,6 +278,32 @@ public class Des {
return resultat;
}
/**
* Remove the last character if it contains only zeros
*
* @param message_decrypte
* @return int[] = array without the last 8 bits if they were all zeroes
*/
public static int[] removeCharNull(int[] message_decrypte) {
int[][] blocsOfOctet = decoupage(message_decrypte, message_decrypte.length / 8);
int[] octet = blocsOfOctet[blocsOfOctet.length - 1];
StringBuilder stringBuilderOctet = new StringBuilder();
for (int i : octet) stringBuilderOctet.append(i);
String stringOctet = stringBuilderOctet.toString();
int c = Integer.parseInt(stringOctet, 2);
if ((char) c == 0) {
int[] newTab = new int[message_decrypte.length - 8];
System.arraycopy(message_decrypte, 0, newTab, 0, newTab.length);
return newTab;
} else {
return message_decrypte;
}
}
/* Genere */
public void genereCle(int n) {
int[] newCle = new int[56];
@@ -364,32 +390,6 @@ public class Des {
return recollageBloc(msg_crypte_bit);
}
/**
* Remove the last character if it contains only zeros
* @param message_decrypte
*
* @return int[] = array without the last 8 bits if they were all zeroes
*/
public static int[] removeCharNull (int[] message_decrypte){
int[][] blocsOfOctet = decoupage(message_decrypte, message_decrypte.length / 8);
int[] octet = blocsOfOctet[blocsOfOctet.length-1];
StringBuilder stringBuilderOctet = new StringBuilder();
for (int i : octet) stringBuilderOctet.append(i);
String stringOctet = stringBuilderOctet.toString();
int c = Integer.parseInt(stringOctet, 2);
if ((char) c == 0){
int[] newTab = new int[message_decrypte.length-8];
System.arraycopy(message_decrypte, 0, newTab, 0, newTab.length);
return newTab;
}else{
return message_decrypte;
}
}
public String decrypte(int[] messageCode) {
int[][] decoupe = decoupage(messageCode, messageCode.length / TAILLE_BLOC);