Decryption code using aes key

AES Descyption/Background Script.JS

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+decryptEncodedResponse: function(encryptedData) {
+
+        var AESCBCPKCPadding = 'AES/CBC/PKCS5Padding';
+        var clientSecret = gs.getProperty('decrypt_key');
+        var probe = new JavascriptProbe("MID_Server_NAME"); //
+        probe.setName("probeName");
+        probe.setJavascript("var dt=new Packages.com.DecryptionUTIL.CodeUTIL();dt.decrypt(" + "'" + AESCBCPKCPadding + "'" + ", " + "'" + encryptedData + "'" + ", " + "'" + clientSecret + "'" + ");");
+        var id = probe.create();
+        while (true) {
+            var checkEccRecord = new GlideRecord('ecc_queue');
+            checkEccRecord.addEncodedQuery('topic=JavascriptProbe^response_to=' + id);
+            checkEccRecord.query();
+            if (checkEccRecord.next()) {
+                break;
+            }
+        }
+        return this.parseXMLforAESDecryption(id);
+    }

AES Descyption/Decrypt.Java

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+package com.DecryptionUTIL.CodeUTIL();
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.spec.InvalidKeySpecException;
+import java.util.Base64;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+
+
+public class CSBUtil {
+
+	public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, NoSuchPaddingException, InvalidAlgorithmParameterException, BadPaddingException, IllegalBlockSizeException {
+
+	    String cipherText = "TmD/I7qMnzJFNa/eTT2CdiNao6TPtznoVh4P+Kgp07oqY7yzXPfgRx7ApKAGwl5VSANvo+5E71Gki13hwgRKAcDBCnhtz1w7ShRVt7WtF5PXBVOx6NPZvuwVrZAZF7lQWwIJCk9jYEgxaZLRFEdBC/km//jmlmwkrsV7i+SHnqNhvY+A8BUlx+/fvae+wNCHWkf1YbbG/TXwj9rRiZhklm0Wuw0UgknleFo4tcCNxrm0o14Wspw+tSfGwR8OXzRKfU3eF+YuBP+p+eYI5FYT2oj8B5g0PUwBp3PinBdUFp9zxJ7s5+GeYDUXxf/u98uecIln5VIYXkJt3HWZwz6l6oRsXf54KQYPvMYMoKH88FzxWEnGs6eDWSCLDbs89Rk9tt/mwnihmzjFUqkPDSJ2rQ==";
+	    SecretKey key = getKeyFromPassword("f4f35fe3ed13641d07cf7f21913b4682");
+	    IvParameterSpec ivParameterSpec = generateIv();
+	    String algorithm = "AES/CBC/PKCS5Padding";
+
+	    String plainText = decrypt(algorithm, cipherText, key, ivParameterSpec);	   
+	    System.out.println("Ciphertext : " + cipherText + "\nPlain Text :" + plainText.substring(16,plainText.length()));
+
+	}
+
+	public static IvParameterSpec generateIv() {
+	    byte[] iv = new byte[16];
+	    new SecureRandom().nextBytes(iv);
+	    return new IvParameterSpec(iv);
+	}
+
+	public static SecretKey getKeyFromPassword(String password)
+		    throws NoSuchAlgorithmException, InvalidKeySpecException {
+
+		    SecretKey secret1 = new SecretKeySpec("samplekey".getBytes(), "AES");		   
+		    return secret1;
+		}
+
+	public static String decrypt(String algorithm, String cipherText, SecretKey key,
+		    IvParameterSpec iv) throws NoSuchPaddingException, NoSuchAlgorithmException,
+		    InvalidAlgorithmParameterException, InvalidKeyException,
+		    BadPaddingException, IllegalBlockSizeException {
+
+		Cipher cipher = Cipher.getInstance(algorithm);
+		cipher.init(Cipher.DECRYPT_MODE, key, iv);
+		byte[] plainText = cipher.doFinal(Base64.getDecoder().decode(cipherText));
+		return new String(plainText);
+	}
+}

AES Descyption/Readme.md

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+This repository contains code to decrypt payload which is encrypted using AES 256
+Decryption to be done using AES key stored in system property named 'decrypt_key'
+The file background script.js contains the code to call jar via ECC- Mid Server
+decrypt.java contains java code utilized for decryption