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1public static String md5(String input) throws NoSuchAlgorithmException {
2    MessageDigest md = MessageDigest.getInstance("MD5");
3    byte[] messageDigest = md.digest(input.getBytes());
4    BigInteger number = new BigInteger(1, messageDigest);
5    return number.toString(16);
6}
7
8public String decrypt(String encryptedData, String initialVectorString, String secretKey) {
9    String decryptedData = null;
10    try {
11        SecretKeySpec skeySpec = new SecretKeySpec(md5(secretKey).getBytes(), "AES");
12        IvParameterSpec initialVector = new IvParameterSpec(initialVectorString.getBytes());
13        Cipher cipher = Cipher.getInstance("AES/CFB8/NoPadding");
14        cipher.init(Cipher.DECRYPT_MODE, skeySpec, initialVector);
15        byte[] encryptedByteArray = (new org.apache.commons.codec.binary.Base64()).decode(encryptedData.getBytes());
16        byte[] decryptedByteArray = cipher.doFinal(encryptedByteArray);
17        decryptedData = new String(decryptedByteArray, "UTF8");
18    } catch (Exception e) {
19        LOGGER.debug("Problem decrypting the data", e);
20    }
21    return decryptedData;
22}