Create Enc.java

vault-test/Enc.java

@@ -0,0 +1,51 @@
+import javax.crypto.Cipher;
+import javax.crypto.spec.SecretKeySpec;
+import javax.crypto.spec.IvParameterSpec;
+import java.util.Base64;
+public class Enc {
+  public static void main(String[] args) throws Exception {
+    if(args == null){
+      System.err.println("args is null");
+      System.exit(1);
+    }
+    if(args.length < 3){
+      System.err.println("args needs to provide key, iv and text to encrypt");
+      System.exit(1);
+    }
+    // Your AES-256 key (32 bytes)
+    String key = args[0];
+
+    // The initialization vector (IV) (16 bytes)
+    String iv = args[1];
+
+    // The string to be encrypted
+    String plaintext = args[2];
+
+    // Encrypt the string
+    byte[] encryptedBytes = encrypt(plaintext, key, iv);
+    String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);
+    System.out.println("Encrypted: " + encryptedText);
+    System.out.println("\n");
+
+    // Decrypt the string
+    String decryptedText = decrypt(Base64.getDecoder().decode(encryptedText), key, iv);
+    System.out.println("Decrypted: " + decryptedText);
+  }
+
+  public static byte[] encrypt(String plaintext, String key, String iv) throws Exception {
+    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+    SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
+    IvParameterSpec initVector = new IvParameterSpec(iv.getBytes());
+    cipher.init(Cipher.ENCRYPT_MODE, secretKey, initVector);
+    return cipher.doFinal(plaintext.getBytes());
+  }
+
+  public static String decrypt(byte[] encryptedBytes, String key, String iv) throws Exception {
+    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+    SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), "AES");
+    IvParameterSpec initVector = new IvParameterSpec(iv.getBytes());
+    cipher.init(Cipher.DECRYPT_MODE, secretKey, initVector);
+    byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
+    return new String(decryptedBytes);
+  }
+}