Ajout de Des.bitsToString et Des.stringToBits(erreur) + tests

2026-05-13 17:12:10 +00:00 · 2022-09-20 15:12:57 +02:00
parent a829ea3cdd
commit e9221ca5f9
3 changed files with 102 additions and 46 deletions
@@ -1,46 +0,0 @@
-/*
- * Des.java, 13/09/2022
- * INU Champollion 2022-2023, L3 INFO
- * pas de copyright, aucun droits
- */
-
-import java.util.ArrayList;
-import java.util.Random;
-
-/**
- * @author Lucàs VABRE
- */
-public class Des {
-
-    private static final int taille_bloc = 64;
-    private static final int taille_sous_bloc = 32;
-    private static final int nb_round = 1;
-    private static final int[] tab_decalage = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};
-    private static final int[] perm_initiale = {58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7};
-    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, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1};
-
-    private int[] masterKey = new int[64];
-    private ArrayList<int[]> table_cles;
-
-    public Des() {
-        Random random = new Random();
-        for (int i = 0; i < masterKey.length; i++) {
-            this.masterKey[0] = random.nextInt(2);
-        }
-        this.table_cles = new ArrayList<int[]>();
-
-    }
-
-    private int[] crypte(String message_clair) {
-//        int[] msg_crypte = message_clair.byt
-        return null;
-
-    }
-
-    private int[] stringToBits(String message) {
-
-
-        return null;
-    }
-}
@@ -0,0 +1,80 @@
+/*
+ * cryptography.Des.java, 13/09/2022
+ * INU Champollion 2022-2023, L3 INFO
+ * pas de copyright, aucun droits
+ */
+package cryptography;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Random;
+
+/**
+ * @author Lucàs VABRE
+ */
+public class Des {
+
+    private static final int TAILLE_BLOC = 64;
+    private static final int TAILLE_SOUS_BLOC = 32;
+    private static final int NB_ROUND = 1;
+    private static final int[] TAB_DECALAGE = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};
+    private static final int[] PERM_INITIALE = {58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7};
+    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, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1};
+
+    private int[] masterKey = new int[64];
+    private ArrayList<int[]> table_cles;
+
+    public Des() {
+        Random random = new Random();
+        for (int i = 0; i < masterKey.length; i++) {
+            this.masterKey[0] = random.nextInt(2);
+        }
+        this.table_cles = new ArrayList<>();
+    }
+
+    public static int[] stringToBits(String message) {
+        char[] bitsInCharList = new BigInteger(message.getBytes())
+                .toString(2)
+                .toCharArray();
+        int[] bits = new int[bitsInCharList.length];
+        for (int i = 0; i < bitsInCharList.length; i++) {
+            bits[i] = Integer.parseInt(String.valueOf(bitsInCharList[i]));
+        }
+        return bits;
+    }
+
+    private static int[] generePermutation(int taille) {
+
+        return null; //Todo Bouchon
+    }
+
+    public static String bitsToString(int[] blocs) {
+
+        StringBuilder bit = new StringBuilder();
+        for (int b : blocs) {
+            bit.append(b);
+        }
+
+        System.out.println(bit);
+
+        byte[] octets = bit.toString().getBytes();
+
+        StringBuilder message = new StringBuilder();
+        for (byte octet : octets) {
+            int charactere = Byte.toUnsignedInt(octet);
+            message.append(charactere);
+        }
+
+        return message.toString();
+    }
+
+    private static int[] crypte(String message_clair) {
+//        int[] msg_crypte = message_clair.byt
+        return null; // Todo Bouchon
+    }
+
+
+}
+
@@ -0,0 +1,22 @@
+package cryptography.test;
+
+import cryptography.Des;
+
+import java.util.Arrays;
+
+public class testDes {
+
+    public static void testStringToBits() {
+        System.out.println(Arrays.toString(Des.stringToBits("Bonjour")));
+    }
+
+    public static void testBitsToString() {
+
+        System.out.println(Des.bitsToString(Des.stringToBits("Bonjour")));
+    }
+
+    public static void main(String[] args) {
+        testStringToBits();
+        testBitsToString();
+    }
+}