Naaturel/masi-symmetric-cypher
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This commit is contained in:
Laurent
2025-10-24 15:13:18 +02:00
parent eb11b9da05
commit e967383845
1 changed files with 7 additions and 5 deletions
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12
src/main/java/step1/Main.java
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@@ -9,11 +9,13 @@ import java.io.*;
import java.net.*; import java.net.*;
import java.nio.charset.StandardCharsets; import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException; import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom; import java.security.SecureRandom;
import java.util.Base64; import java.util.Base64;
public class Main { public class Main {
private static final String PROVIDER = "SunJCE";
private static final String ALGORITHM = "DESede"; private static final String ALGORITHM = "DESede";
private static final String TRANSFORMATION = "DESede/ECB/PKCS5Padding"; private static final String TRANSFORMATION = "DESede/ECB/PKCS5Padding";
@@ -65,9 +67,9 @@ public class Main {
} }
} }
public static void send(Socket socket, String message) throws IOException { public static void send(Socket socket, String data) throws IOException {
OutputStream output = socket.getOutputStream(); OutputStream output = socket.getOutputStream();
output.write(String.format("%s\r\n", message).getBytes(StandardCharsets.UTF_8)); output.write(String.format("%s\r\n", data).getBytes(StandardCharsets.UTF_8));
output.flush(); output.flush();
} }
@@ -75,9 +77,9 @@ public class Main {
return reader.readLine(); return reader.readLine();
} }
public static SecretKey get3DESKey() throws NoSuchAlgorithmException { public static SecretKey get3DESKey() throws NoSuchAlgorithmException, NoSuchProviderException {
KeyGenerator keyGen = KeyGenerator.getInstance(ALGORITHM); KeyGenerator keyGen = KeyGenerator.getInstance(ALGORITHM, PROVIDER);
keyGen.init(168); keyGen.init(new SecureRandom());
return keyGen.generateKey(); return keyGen.generateKey();
} }