lucasvbr/data-encryption-standard
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test crypte decrypte, permutation, recollage, decale, ...

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Lucàs
2022-11-04 17:48:06 +01:00
parent 46b6849c93
commit f56ffc4c48
3 changed files with 167 additions and 83 deletions
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src/cryptography/Des.java
+27 -22
View File
@@ -44,13 +44,13 @@ public class Des {
};
*/
/* private static final int[][] S = {
{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7},
{0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8},
{4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0},
{15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}
};
*/
/* private static final int[][] S = {
{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7},
{0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8},
{4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0},
{15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}
};
*/
private static final int[] E = {
32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
@@ -61,15 +61,14 @@ public class Des {
24, 25, 26, 27, 28, 29,
28, 29, 30, 31, 32, 1,
};
public ArrayList<int[]> table_cles;
private final ArrayList<int[][]> table_S;
public ArrayList<int[]> table_cles;
private int[] masterKey = new int[64];
public Des() {
Random random = new Random();
for (int i = 0; i < masterKey.length; i++) {
for (int i = 0; i < masterKey.length; i++)
this.masterKey[i] = random.nextInt(2);
}
this.table_cles = new ArrayList<>();
this.table_S = new ArrayList<>();
}
@@ -224,25 +223,29 @@ public class Des {
}
/* Permutations */
public static void permutation(int[] tab_permutation, int[] bloc) {
int[] newTab = new int[bloc.length];
for (int i = 0; i < bloc.length; i++) {
public static int[] permutation(int[] tableauPermutation, int[] bloc) {
if (tableauPermutation.length != bloc.length)
throw new IllegalArgumentException("tableauPermutation et bloc n'ont pas la même taille");
newTab[i] = bloc[tab_permutation[i] % tab_permutation.length];
int[] resultat = new int[bloc.length];
for (int i = 0; i < bloc.length; i++) {
resultat[i] = bloc[tableauPermutation[i] % tableauPermutation.length];
}
System.arraycopy(newTab, 0, bloc, 0, newTab.length);
System.arraycopy(resultat, 0, bloc, 0, resultat.length);
return resultat;
}
public static void invPermutation(int[] tab_permutation, int[] bloc) {
int[] newTab = new int[bloc.length];
public static int[] invPermutation(int[] tableauPermutation, int[] bloc) {
if (tableauPermutation.length != bloc.length)
throw new IllegalArgumentException("tableauPermutation et bloc n'ont pas la même taille");
int[] resultat = new int[bloc.length];
for (int i = 0; i < bloc.length; i++) {
newTab[tab_permutation[i] % tab_permutation.length] = bloc[i];
resultat[tableauPermutation[i] % tableauPermutation.length] = bloc[i];
}
System.arraycopy(newTab, 0, bloc, 0, newTab.length);
System.arraycopy(resultat, 0, bloc, 0, resultat.length);
return resultat;
}
public static int[] generePermutation(int taille) {
@@ -309,7 +312,7 @@ public class Des {
}
/* Genere */
public void genereCle(int n) {
public int[][] genereCle(int n) {
int[] newCle = new int[56];
int[] lastCle = new int[48];
int[] permInit = generePermutation(newCle.length);
@@ -327,6 +330,8 @@ public class Des {
System.arraycopy(newCle, 0, lastCle, 0, lastCle.length);
permutation(lastPerm, lastCle);
this.table_cles.add(lastCle);
return table_cles.toArray(new int[][]{});
}
public void genereS(int n) {
src/cryptography/temp/testDes.java
+3 -4
View File
@@ -89,13 +89,12 @@ public class testDes {
}
public static void testFonctionS() {
// System.out.println(Arrays.toString(Des.fonction_S(new int[]{1, 1, 1, 1, 1, 1})));
//System.out.println(Arrays.toString(Des.fonction_S(new int[]{1, 1, 1, 1, 1, 1})));
}
public static void testFonctionF() {
Des des = new Des();
// System.out.println(Arrays.toString(des.fonction_F()));
//Des des = new Des();
//System.out.println(Arrays.toString(des.fonction_F()));
}
private static void testCrypte() {