Chat client serveur non securisé

.idea/workspace.xml

@@ -1,8 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" name="Changes" comment="" />
+    <list default="true" id="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" name="Changes" comment="">
-    <list id="84fd72d2-dba6-4275-83d3-958fab491b17" name="Changes by burgu" comment="" />
+      <change afterPath="$PROJECT_DIR$/src/reseau/AES.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/client/Client.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/client/Client.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/serveur/Serveur.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/serveur/Serveur.java" afterDir="false" />
+    </list>
+    <list id="84fd72d2-dba6-4275-83d3-958fab491b17" name="Changes by burgu" comment="">
+      <change beforePath="$PROJECT_DIR$/src/client/Client.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/client/Client.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/serveur/Serveur.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/serveur/Serveur.java" afterDir="false" />
+    </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
@@ -18,6 +26,42 @@
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
+  <component name="LineStatusTrackerManager">
+    <file path="$PROJECT_DIR$/src/serveur/Serveur.java">
+      <ranges>
+        <range start1="5" end1="5" start2="5" end2="6" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
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+        <range start1="49" end1="50" start2="52" end2="59" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="55" end1="56" start2="64" end2="64" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+      </ranges>
+    </file>
+    <file path="$PROJECT_DIR$/src/client/Client.java">
+      <ranges>
+        <range start1="8" end1="8" start2="8" end2="9" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="10" end1="10" start2="11" end2="14" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="11" end1="12" start2="15" end2="16" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="14" end1="14" start2="18" end2="19" changelist="84fd72d2-dba6-4275-83d3-958fab491b17" />
+        <range start1="15" end1="15" start2="20" end2="21" changelist="84fd72d2-dba6-4275-83d3-958fab491b17" />
+        <range start1="16" end1="17" start2="22" end2="23" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="18" end1="20" start2="24" end2="26" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="28" end1="35" start2="34" end2="47" changelist="79e91d13-7d5f-4b9a-954b-9bc7cde074fc" />
+        <range start1="36" end1="36" start2="48" end2="50" changelist="84fd72d2-dba6-4275-83d3-958fab491b17" />
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+      </ranges>
+    </file>
+  </component>
   <component name="MarkdownSettingsMigration">
     <option name="stateVersion" value="1" />
   </component>
@@ -34,10 +78,26 @@
     "RunOnceActivity.OpenProjectViewOnStart": "true",
     "RunOnceActivity.ShowReadmeOnStart": "true",
     "WebServerToolWindowFactoryState": "false",
-    "codeWithMe.voiceChat.enabledByDefault": "false"
+    "codeWithMe.voiceChat.enabledByDefault": "false",
+    "project.structure.last.edited": "Project",
+    "project.structure.proportion": "0.0",
+    "project.structure.side.proportion": "0.0"
   }
 }]]></component>
-  <component name="RunManager" selected="Application.Client">
+  <component name="RunManager" selected="Application.AES">
+    <configuration name="AES" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="reseau.AES" />
+      <module name="projet-mini-chat" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="reseau.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
     <configuration name="Client" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
       <option name="MAIN_CLASS_NAME" value="client.Client" />
       <module name="projet-mini-chat" />
@@ -51,6 +111,19 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
+    <configuration name="Client2" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="client.Client2" />
+      <module name="projet-mini-chat" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="client.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
     <configuration name="Serveur" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
       <option name="MAIN_CLASS_NAME" value="serveur.Serveur" />
       <module name="projet-mini-chat" />
@@ -64,14 +137,33 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
+    <configuration name="Serveur2" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="serveur.Serveur2" />
+      <module name="projet-mini-chat" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="serveur.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
     <list>
+      <item itemvalue="Application.AES" />
+      <item itemvalue="Application.Client2" />
+      <item itemvalue="Application.Serveur2" />
       <item itemvalue="Application.Client" />
       <item itemvalue="Application.Serveur" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="Application.AES" />
         <item itemvalue="Application.Client" />
         <item itemvalue="Application.Serveur" />
+        <item itemvalue="Application.Client2" />
+        <item itemvalue="Application.Serveur2" />
       </list>
     </recent_temporary>
   </component>
@@ -84,6 +176,7 @@
       <option name="presentableId" value="Default" />
       <updated>1668515473737</updated>
       <workItem from="1668515476841" duration="6049000" />
+      <workItem from="1669119772164" duration="6834000" />
     </task>
     <servers />
   </component>

src/client/Client.java

@@ -6,18 +6,24 @@ import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.rmi.UnknownHostException;
+import java.util.Scanner;
 
 public class Client {
+
+    public static final Scanner scan = new Scanner(System.in);
+
     public static void main(String[] args) throws IOException {
-        Socket echoSocket = null;
+        Socket serverSocket = null;
         PrintWriter out = null;
         BufferedReader in = null;
+        boolean ecoute = false;
 
+        // Création des Sockets
         try {
-            echoSocket = new Socket("localhost", 4444);
+            serverSocket = new Socket("localhost", 4444);
             System.out.println("Connecté au serveur");
-            out = new PrintWriter(echoSocket.getOutputStream(), true);
+            out = new PrintWriter(serverSocket.getOutputStream(), true);
-            in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
+            in = new BufferedReader(new InputStreamReader(serverSocket.getInputStream()));
         } catch (UnknownHostException e) {
             System.out.println("Destination unknown");
             System.exit(-1);
@@ -26,17 +32,24 @@ public class Client {
             System.exit(-1);
         }
 
-        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
+        String message = null;
-        String userInput;
+        do {
-
+            //ecoute d'un message
-        while ((userInput = stdIn.readLine()) != null) {
+            if (ecoute) {
-            out.println(userInput);
+                message = in.readLine();
-            System.out.println("echo: " + userInput);
+                System.out.printf("serveur > %s\n", message);
-        }
+            } else {
+                System.out.print("client > ");
+                message = scan.nextLine();
+                out.println(message);
+            }
+            ecoute = !ecoute;
+        } while (!message.equals("bye"));
 
+        //deconnexion
+        //fermeture des Sockets
         out.close();
         in.close();
-        stdIn.close();
+        serverSocket.close();
-        echoSocket.close();
     }
 }

src/reseau/AES.java

@@ -0,0 +1,62 @@
+package reseau;
+
+import javax.crypto.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.*;
+import java.util.Arrays;
+
+public class AES {
+
+    public static byte[] genererCle() {
+        byte[] data;
+        byte[] result;
+        byte[] original = null;
+        try {
+            KeyGenerator kg = KeyGenerator.getInstance("DES");
+            Key key = kg.generateKey();
+            return key.getEncoded();
+//            Cipher cipher = Cipher.getInstance("DES") ;
+//            cipher.init(Cipher.ENCRYPT_MODE, key) ;
+//            data = "Hello World".getBytes() ;
+//            result = cipher.doFinal(data) ;
+//            cipher.init(Cipher.DECRYPT_MODE, key) ;
+//            original = cipher.doFinal(result) ;
+//            System.out.println("Decrypted data :" + Arrays.toString(original)) ;
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return original;
+    }
+
+    public static byte[] decrypter(byte[] msg, Key key) {
+        try {
+            Cipher cipher = Cipher.getInstance("DES") ;
+            cipher.init(Cipher.DECRYPT_MODE, key);
+            return cipher.doFinal(msg);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static byte[] encrypter(String msg, Key key){
+        try {
+            Cipher cipher = Cipher.getInstance("DES") ;
+            cipher.init(Cipher.ENCRYPT_MODE, key) ;
+            return cipher.doFinal(msg.getBytes());
+        } catch(Exception e){
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static void sauvegarderFichier(Key key) {
+        Path fileName = Path.of("./cle.txt");
+        Files.writeString(fileName, new String(key));
+    }
+
+    public static void main(String[] args) {
+
+    }
+}

src/serveur/Serveur.java

@@ -3,56 +3,64 @@ package serveur;
 import java.io.*;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.util.Scanner;
 
 public class Serveur {
+
+    private static final int PORT = 4444;
+    private static final Scanner scan = new Scanner(System.in);
+
     public static void main(String[] args) {
         ServerSocket serverSocket = null;
-        try {
-            serverSocket = new ServerSocket(4444);
-        } catch (IOException e) {
-            System.out.println("Could not listen on port 4444");
-            System.exit(-1);
-        }
-
         Socket clientSocket = null;
+
+        // Connexion
         try {
-            clientSocket = serverSocket.accept();
+            serverSocket = new ServerSocket(PORT); // Crée le serveur
+            clientSocket = serverSocket.accept();  // On recherche un client
         } catch (IOException e) {
-            System.out.println("Accept failed on port 4444");
+            System.out.printf("Erreur de connexion sur le port: %d\n", PORT);
             System.exit(-1);
         }
 
+        // Un client a été trouvé
         System.out.println("Client connecté");
-        boolean quitte = false;
+
+        boolean connectee = true;
         boolean reception = true;
 
-        DataOutputStream envoi = null;
+        BufferedReader in = null;
-        BufferedReader recevoir = null;
+
+        PrintWriter out = null;
 
         try {
-            OutputStream outputStream = clientSocket.getOutputStream();
+            in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
-            envoi = new DataOutputStream(outputStream);
-            recevoir = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
 
-            while (!quitte) {
+            out = new PrintWriter(clientSocket.getOutputStream(), true);
+
+            String message = null;
+            do {
                 if (reception) {
-                    String message = null;
+                    message = in.readLine();
-                    while (message == null){
+                    System.out.printf("client > %s\n", message);
-                        message = recevoir.readLine();
+                } else {
-                    }
+                    System.out.print("serveur > ");
-                    while(message != null){
+                    message = scan.nextLine();
-                        System.out.println(message);
+                    out.println(message);
-                        message= recevoir.readLine();
-                    }
-
                 }
+
                 reception = !reception;
-            }
+            } while (!message.equals("bye"));
+
+            in.close();
+            out.close();
+            clientSocket.close();
+            serverSocket.close();
+
         } catch (IOException e) {
             e.printStackTrace();
         }
 
 
-
     }
 }