Created File_Encryption tool

File_Encryption.Java

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+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.security.Key;
+import java.security.MessageDigest;
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class FileEncryptionDecryptionTool {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter the file path: ");
+        String filePath = scanner.nextLine();
+
+        System.out.print("Enter the encryption key (16 characters): ");
+        String encryptionKey = scanner.nextLine();
+
+        try {
+            byte[] key = encryptionKey.getBytes();
+            key = Arrays.copyOf(key, 16); // Ensure the key is exactly 16 bytes
+
+            SecretKey secretKey = new SecretKeySpec(key, "AES");
+            Cipher cipher = Cipher.getInstance("AES");
+
+            // Encrypt the file
+            byte[] fileData = Files.readAllBytes(Paths.get(filePath));
+            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
+            byte[] encryptedData = cipher.doFinal(fileData);
+
+            Path encryptedFilePath = Paths.get(filePath + ".enc");
+            Files.write(encryptedFilePath, encryptedData, StandardOpenOption.CREATE);
+
+            System.out.println("File encrypted successfully to: " + encryptedFilePath);
+
+            // Decrypt the file
+            System.out.print("Do you want to decrypt the file (Y/N)? ");
+            String choice = scanner.nextLine();
+
+            if (choice.equalsIgnoreCase("Y")) {
+                cipher.init(Cipher.DECRYPT_MODE, secretKey);
+                byte[] decryptedData = cipher.doFinal(encryptedData);
+                Path decryptedFilePath = Paths.get(filePath + ".dec");
+                Files.write(decryptedFilePath, decryptedData, StandardOpenOption.CREATE);
+
+                System.out.println("File decrypted successfully to: " + decryptedFilePath);
+            }
+        } catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+    }
+}